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生物質能源的應用技術研究

發布時間: 2017-08-17 22:28   59987 次瀏覽


化(hua)(hua)(hua)石能(neng)(neng)(neng)源(yuan)(yuan)(yuan)(yuan)的(de)(de)(de)日益緊(jin)缺及其衍生(sheng)(sheng)(sheng)(sheng)的(de)(de)(de)環(huan)境污染問題越來(lai)越嚴(yan)重。生(sheng)(sheng)(sheng)(sheng)物(wu)(wu)(wu)質(zhi)能(neng)(neng)(neng)源(yuan)(yuan)(yuan)(yuan)的(de)(de)(de)開(kai)發(fa)(fa)和應(ying)用(yong)(yong),以其可再生(sheng)(sheng)(sheng)(sheng)性和環(huan)保(bao)性,越來(lai)越受到(dao)人們的(de)(de)(de)重視。***目(mu)前的(de)(de)(de)應(ying)用(yong)(yong)現(xian)(xian)狀(zhuang)來(lai)看,其應(ying)用(yong)(yong)形態,主(zhu)(zhu)要(yao)分(fen)為(wei)固態生(sheng)(sheng)(sheng)(sheng)物(wu)(wu)(wu)質(zhi)能(neng)(neng)(neng)源(yuan)(yuan)(yuan)(yuan)、液態生(sheng)(sheng)(sheng)(sheng)物(wu)(wu)(wu)質(zhi)能(neng)(neng)(neng)源(yuan)(yuan)(yuan)(yuan)和氣(qi)(qi)態生(sheng)(sheng)(sheng)(sheng)物(wu)(wu)(wu)質(zhi)能(neng)(neng)(neng)源(yuan)(yuan)(yuan)(yuan)三種(zhong)。采用(yong)(yong)物(wu)(wu)(wu)理方(fang)法的(de)(de)(de)生(sheng)(sheng)(sheng)(sheng)物(wu)(wu)(wu)質(zhi)固態成型(xing)技(ji)術的(de)(de)(de)優勢在于設(she)備簡單,生(sheng)(sheng)(sheng)(sheng)產工(gong)藝簡便,利用(yong)(yong)方(fang)式(shi)簡潔,但也同樣存(cun)在著(zhu)加(jia)工(gong)方(fang)式(shi)粗放,能(neng)(neng)(neng)源(yuan)(yuan)(yuan)(yuan)轉換(huan)效率(lv)低下等劣勢。液態生(sheng)(sheng)(sheng)(sheng)物(wu)(wu)(wu)質(zhi)能(neng)(neng)(neng)源(yuan)(yuan)(yuan)(yuan)能(neng)(neng)(neng)夠直接替代現(xian)(xian)在化(hua)(hua)(hua)石能(neng)(neng)(neng)源(yuan)(yuan)(yuan)(yuan)的(de)(de)(de)可能(neng)(neng)(neng)性******,但是它的(de)(de)(de)生(sheng)(sheng)(sheng)(sheng)產工(gong)藝復(fu)雜(za),專業化(hua)(hua)(hua)集成度較高,推廣(guang)(guang)有一定的(de)(de)(de)限(xian)制。氣(qi)(qi)態生(sheng)(sheng)(sheng)(sheng)物(wu)(wu)(wu)質(zhi)能(neng)(neng)(neng)源(yuan)(yuan)(yuan)(yuan)利用(yong)(yong)***廣(guang)(guang)泛,主(zhu)(zhu)要(yao)有氣(qi)(qi)化(hua)(hua)(hua)發(fa)(fa)電和農(nong)用(yong)(yong)沼氣(qi)(qi)等方(fang)式(shi)。存(cun)在的(de)(de)(de)主(zhu)(zhu)要(yao)利用(yong)(yong)瓶頸***是氣(qi)(qi)態生(sheng)(sheng)(sheng)(sheng)物(wu)(wu)(wu)質(zhi)當中含(han)有多種(zhong)雜(za)質(zhi),去除雜(za)質(zhi)的(de)(de)(de)方(fang)法缺乏。經(jing)過研究發(fa)(fa)現(xian)(xian),雖然生(sheng)(sheng)(sheng)(sheng)物(wu)(wu)(wu)質(zhi)能(neng)(neng)(neng)源(yuan)(yuan)(yuan)(yuan)的(de)(de)(de)發(fa)(fa)展受到(dao)一些(xie)限(xian)制,但是隨著(zhu)其利用(yong)(yong)技(ji)術的(de)(de)(de)******和現(xian)(xian)代經(jing)濟社會的(de)(de)(de)發(fa)(fa)展,生(sheng)(sheng)(sheng)(sheng)物(wu)(wu)(wu)質(zhi)能(neng)(neng)(neng)源(yuan)(yuan)(yuan)(yuan)的(de)(de)(de)開(kai)發(fa)(fa)和利用(yong)(yong)前景很廣(guang)(guang)闊。

  隨(sui)著(zhu)經濟的(de)(de)迅速發展(zhan)(zhan),人(ren)們對(dui)能(neng)(neng)(neng)(neng)源(yuan)(yuan)(yuan)(yuan)(yuan)的(de)(de)依賴程(cheng)度越來(lai)(lai)越高(gao)。但(dan)人(ren)們也越來(lai)(lai)越清醒的(de)(de)認識到,以煤、石油、天然氣為(wei)主的(de)(de)化(hua)(hua)石能(neng)(neng)(neng)(neng)源(yuan)(yuan)(yuan)(yuan)(yuan)儲(chu)量有限,是************能(neng)(neng)(neng)(neng)源(yuan)(yuan)(yuan)(yuan)(yuan)。近(jin)百(bai)年來(lai)(lai),全球(qiu)各(ge)國(guo)不(bu)同程(cheng)度的(de)(de)對(dui)化(hua)(hua)石能(neng)(neng)(neng)(neng)源(yuan)(yuan)(yuan)(yuan)(yuan)進(jin)行了(le)(le)過渡(du)性開(kai)采,化(hua)(hua)石能(neng)(neng)(neng)(neng)源(yuan)(yuan)(yuan)(yuan)(yuan)的(de)(de)枯竭已是遲早(zao)之(zhi)事,已不(bu)能(neng)(neng)(neng)(neng)滿足人(ren)類(lei)飛速發展(zhan)(zhan)的(de)(de)需求。而且(qie)化(hua)(hua)石能(neng)(neng)(neng)(neng)源(yuan)(yuan)(yuan)(yuan)(yuan)的(de)(de)集中(zhong)大量消(xiao)耗,對(dui)人(ren)類(lei)居住的(de)(de)環境(jing)造成(cheng)嚴重(zhong)的(de)(de)污染,引發全球(qiu)氣溫升高(gao),從而影(ying)響(xiang)了(le)(le)生態環境(jing)。因此(ci),能(neng)(neng)(neng)(neng)源(yuan)(yuan)(yuan)(yuan)(yuan)緊缺問(wen)(wen)題(ti)(ti)、環境(jing)污染問(wen)(wen)題(ti)(ti)已成(cheng)為(wei)當(dang)今世(shi)界(jie)(jie)必須(xu)面(mian)對(dui)解決(jue)的(de)(de)重(zhong)要問(wen)(wen)題(ti)(ti),開(kai)發新的(de)(de)可(ke)再生綠色能(neng)(neng)(neng)(neng)源(yuan)(yuan)(yuan)(yuan)(yuan),便成(cheng)為(wei)各(ge)國(guo)面(mian)臨的(de)(de)重(zhong)要課題(ti)(ti)。世(shi)界(jie)(jie)能(neng)(neng)(neng)(neng)源(yuan)(yuan)(yuan)(yuan)(yuan)發展(zhan)(zhan)已進(jin)入新一(yi)輪戰略調整期。_1]生物(wu)(wu)質能(neng)(neng)(neng)(neng)源(yuan)(yuan)(yuan)(yuan)(yuan)是目前(qian)人(ren)類(lei)可(ke)利(li)用綠色可(ke)再生能(neng)(neng)(neng)(neng)源(yuan)(yuan)(yuan)(yuan)(yuan)之(zhi)一(yi),世(shi)界(jie)(jie)能(neng)(neng)(neng)(neng)源(yuan)(yuan)(yuan)(yuan)(yuan)委員會將生物(wu)(wu)質能(neng)(neng)(neng)(neng)源(yuan)(yuan)(yuan)(yuan)(yuan)列為(wei)可(ke)再生能(neng)(neng)(neng)(neng)源(yuan)(yuan)(yuan)(yuan)(yuan)的(de)(de)******。生物(wu)(wu)質能(neng)(neng)(neng)(neng)源(yuan)(yuan)(yuan)(yuan)(yuan)分布廣泛(fan),幾乎處(chu)(chu)處(chu)(chu)都有,各(ge)國(guo)對(dui)生物(wu)(wu)質能(neng)(neng)(neng)(neng)源(yuan)(yuan)(yuan)(yuan)(yuan)的(de)(de)開(kai)發與(yu)利(li)用早(zao)已如火如荼的(de)(de)展(zhan)(zhan)開(kai)了(le)(le),有些(xie)技(ji)術已經產業化(hua)(hua)。

  1生物質能源(yuan)概述

  1.1生物質能源的生成機理.

  生(sheng)物(wu)(wu)(wu)(wu)質(zhi)能(neng)(neng)(neng)源(yuan)是(shi)地球上***普遍的(de)一(yi)種(zhong)(zhong)可再生(sheng)能(neng)(neng)(neng)源(yuan),它是(shi)通(tong)過植物(wu)(wu)(wu)(wu)光合(he)作(zuo)用(yong),將太陽能(neng)(neng)(neng)以化學(xue)能(neng)(neng)(neng)的(de)形(xing)式貯存(cun)在生(sheng)物(wu)(wu)(wu)(wu)體內的(de)一(yi)種(zhong)(zhong)能(neng)(neng)(neng)量形(xing)式,被稱為綠(lv)色能(neng)(neng)(neng)源(yuan)。狹義的(de)生(sheng)物(wu)(wu)(wu)(wu)質(zhi)一(yi)般是(shi)指植物(wu)(wu)(wu)(wu)體在生(sheng)長過程中(zhong),將太陽能(neng)(neng)(neng)轉(zhuan)化為化學(xue)能(neng)(neng)(neng),并(bing)存(cun)儲(chu)在植物(wu)(wu)(wu)(wu)體各個器(qi)官內的(de)能(neng)(neng)(neng)源(yuan)物(wu)(wu)(wu)(wu)質(zhi)形(xing)式。廣義的(de)生(sheng)物(wu)(wu)(wu)(wu)質(zhi)還包括以植物(wu)(wu)(wu)(wu)體或某器(qi)官為食物(wu)(wu)(wu)(wu)而轉(zhuan)化至動物(wu)(wu)(wu)(wu)、微(wei)生(sheng)物(wu)(wu)(wu)(wu)等(deng)(deng)生(sheng)命(ming)體獲得(de)的(de)能(neng)(neng)(neng)源(yuan)物(wu)(wu)(wu)(wu)質(zhi)形(xing)式,包括利用(yong)現代技術(shu)加工(gong)生(sheng)物(wu)(wu)(wu)(wu)體或器(qi)官后剩余的(de)廢棄物(wu)(wu)(wu)(wu)等(deng)(deng)。因此,生(sheng)物(wu)(wu)(wu)(wu)質(zhi)能(neng)(neng)(neng)源(yuan)從根(gen)本上說,來源(yuan)于太陽能(neng)(neng)(neng),使所存(cun)儲(chu)的(de)能(neng)(neng)(neng)量轉(zhuan)移至生(sheng)物(wu)(wu)(wu)(wu)質(zhi)依賴于光合(he)作(zuo)用(yong),作(zuo)用(yong)如下:

           

因(yin)此(ci)生物質主(zhu)要為(wei)(wei)含(han)碳、氫(qing)有(you)機物,具有(you)含(han)硫(liu)、氮少,CO2排放(fang)幾乎為(wei)(wei)零的優點(dian),另(ling)外一般還含(han)有(you)少量的鉀、鈉等金屬元(yuan)素。

  1.2生物質能源開發研究(jiu)的(de)國內外現(xian)狀

  人類對生物質(zhi)能(neng)源(yuan)的(de)(de)利用不是剛(gang)剛(gang)開(kai)始,100多(duo)年前,人們對化石能(neng)源(yuan)的(de)(de)依賴(lai)程(cheng)度(du)還不高(gao),能(neng)源(yuan)便主(zhu)要來(lai)自于生物質(zhi)。19世(shi)紀末(mo)20世(shi)紀初,對能(neng)源(yuan)的(de)(de)需(xu)求急劇增加(jia),隨著煤炭(tan)開(kai)采業的(de)(de)發展(zhan),煤炭(tan)迅(xun)速替代生物質(zhi),成為(wei)人類主(zhu)要能(neng)源(yuan)來(lai)源(yuan),生物質(zhi)能(neng)源(yuan)在(zai)人類消耗的(de)(de)能(neng)源(yuan)中的(de)(de)比例逐步(bu)縮小。

  1.2.1國外研(yan)究現狀

  目前(qian),許多國家對生(sheng)物質能源開發利用(yong)已進行了大量(liang)研究(jiu)和實踐。生(sheng)物質固(gu)化成(cheng)型技術在歐(ou)美、日韓(han)等(deng)國家已比(bi)較成(cheng)熟(shu),生(sheng)物質固(gu)化燃料在日、美等(deng)國家已經商(shang)品化,工業生(sheng)產、家庭采暖等(deng)均有使用(yong)。

  日本和歐美(mei)等國(guo)家的小型生物(wu)質燃(ran)料設備已(yi)經產業化(hua),在供暖、發(fa)電(dian)領域得到普遍推廣(guang)。國(guo)外已(yi)有較******的流(liu)化(hua)床反(fan)應器、循環流(liu)化(hua)床反(fan)應器、真空熱裂解反(fan)應器等生物(wu)質制(zhi)備設備。美(mei)國(guo)在生物(wu)質氣(qi)化(hua)發(fa)電(dian)方(fang)面處于************地位,發(fa)電(dian)量(liang)已(yi)超(chao)過(guo)其利用(yong)風(feng)能、太陽能、地熱能發(fa)電(dian)的總(zong)和。1980年,美(mei)國(guo)提(ti)出以(yi)生物(wu)柴(chai)油(you)代替化(hua)石柴(chai)油(you)戰略,2005年成為(wei)世(shi)界******燃(ran)料乙醇(chun)(chun)生產大國(guo)。巴(ba)西(xi)長期(qi)以(yi)來將推廣(guang)乙醇(chun)(chun)燃(ran)料作為(wei)國(guo)家重(zhong)要能源政策之一。美(mei)國(guo)和巴(ba)西(xi)是世(shi)界上(shang)******的燃(ran)料乙醇(chun)(chun)生產國(guo)。

  1.2.2國內研究現(xian)狀

  我國生(sheng)(sheng)(sheng)(sheng)物(wu)質(zhi)(zhi)直燃(ran)發電和氣(qi)化(hua)(hua)發電已(yi)(yi)(yi)逐(zhu)步實(shi)現了產(chan)(chan)業(ye)化(hua)(hua),燃(ran)料乙(yi)醇技(ji)術正在起步應用,已(yi)(yi)(yi)建成燃(ran)料乙(yi)醇示(shi)(shi)范廠;生(sheng)(sheng)(sheng)(sheng)物(wu)柴油技(ji)術已(yi)(yi)(yi)進入產(chan)(chan)業(ye)示(shi)(shi)范階(jie)段(duan);大(da)中型制氣(qi)工程工藝技(ji)術已(yi)(yi)(yi)日(ri)趨成熟。生(sheng)(sheng)(sheng)(sheng)物(wu)質(zhi)(zhi)的(de)(de)直接(jie)、間(jian)接(jie)液化(hua)(hua)生(sheng)(sheng)(sheng)(sheng)產(chan)(chan)液體(ti)燃(ran)料技(ji)術準備進行工業(ye)示(shi)(shi)范。據估算,地球上每年光(guang)合(he)作用產(chan)(chan)生(sheng)(sheng)(sheng)(sheng)的(de)(de)生(sheng)(sheng)(sheng)(sheng)物(wu)質(zhi)(zhi)能量是世界主要燃(ran)料消(xiao)耗的(de)(de)10倍,而其利用量還不(bu)到1%。我國是一個農(nong)業(ye)大(da)國,具(ju)有(you)豐富的(de)(de)農(nong)林生(sheng)(sheng)(sheng)(sheng)物(wu)質(zhi)(zhi)資(zi)源,因此(ci),開發生(sheng)(sheng)(sheng)(sheng)物(wu)質(zhi)(zhi)能源具(ju)有(you)深(shen)遠(yuan)的(de)(de)意義(yi),應用前景廣闊。

  1.3生物質能源的(de)幾個主要來源途(tu)徑

  目前,用于生物(wu)(wu)(wu)質能(neng)源(yuan)開發的主要是(shi)非糧生物(wu)(wu)(wu)質,如作物(wu)(wu)(wu)秸稈(gan)、林場枝葉廢(fei)棄物(wu)(wu)(wu),畜(chu)牧糞便、動物(wu)(wu)(wu)產品下腳料,生活垃(la)圾,城市(shi)有(you)機廢(fei)水(shui)和(he)(he)污(wu)泥(ni)等(deng)。長期以來,人們對生物(wu)(wu)(wu)質資源(yuan)中的固體廢(fei)棄物(wu)(wu)(wu)常用的處理方法(fa)(fa)為堆(dui)肥、填埋(mai)、焚燒等(deng)。堆(dui)肥法(fa)(fa)和(he)(he)填埋(mai)法(fa)(fa)周(zhou)期長,且容易(yi)對土(tu)壤和(he)(he)水(shui)資源(yuan)造成(cheng)二次污(wu)染;焚燒法(fa)(fa)可(ke)以利用其熱值,但投資巨大,成(cheng)本高,容易(yi)造成(cheng)大氣(qi)污(wu)染。因此,這(zhe)些(xie)廢(fei)棄物(wu)(wu)(wu)的有(you)效利用不(bu)僅可(ke)以增(zeng)值形成(cheng)新能(neng)源(yuan),還可(ke)以解決環境污(wu)染問題(ti)。

  1.3.1作物秸稈

  農作(zuo)物秸稈(gan)是非常豐富的(de)(de)可(ke)(ke)再生生物質資源(yuan),包括(kuo)小麥、玉米、高粱、棉花、大豆、水稻等農作(zuo)物收獲后(hou)的(de)(de)廢(fei)棄(qi)部分(fen),還(huan)包括(kuo)農產(chan)品加(jia)工后(hou)的(de)(de)廢(fei)棄(qi)部分(fen),如甘(gan)蔗渣。我國(guo)每年(nian)產(chan)秸稈(gan)量(liang)相當于3.5億t標準煤,去除工業使(shi)用(yong)(yong)(yong)、粉碎還(huan)田、飼料、培養食用(yong)(yong)(yong)菌、農戶炊(chui)事及取暖焚(fen)燒(shao)等使(shi)用(yong)(yong)(yong)外(wai),至少剩余30%,常直接被焚(fen)燒(shao),不(bu)僅造(zao)成大量(liang)能源(yuan)資源(yuan)浪費,而且導致環境污(wu)染。因此,將廢(fei)棄(qi)的(de)(de)秸稈(gan)充分(fen)利用(yong)(yong)(yong),既可(ke)(ke)以(yi)提(ti)取所含能量(liang),又(you)可(ke)(ke)以(yi)改善農村環境,減少空氣污(wu)染,利用(yong)(yong)(yong)后(hou)的(de)(de)秸稈(gan)灰還(huan)可(ke)(ke)以(yi)直接返(fan)田增加(jia)土壤(rang)無機肥料。

  1.3.2畜(chu)禽糞(fen)便

  我國畜(chu)(chu)(chu)禽業比較發(fa)達(da),養(yang)殖(zhi)的(de)畜(chu)(chu)(chu)禽主(zhu)要(yao)為牛、豬、雞(ji)。家庭圈養(yang)、散養(yang)的(de)畜(chu)(chu)(chu)禽糞便搜集(ji)不(bu)便,且很多(duo)養(yang)殖(zhi)戶(hu)直接將糞便漚肥(fei)(fei)用于肥(fei)(fei)田;但規(gui)模(mo)化畜(chu)(chu)(chu)禽養(yang)殖(zhi)場,每年產生(sheng)大(da)量(liang)養(yang)殖(zhi)糞便和污(wu)水(shui),有(you)機(ji)物的(de)閑置對環境和地下水(shui)造成了極大(da)污(wu)染。我國每年有(you)25億(yi)(yi)(yi)(yi)t畜(chu)(chu)(chu)牧(mu)糞便和大(da)量(liang)有(you)機(ji)廢棄物閑置或(huo)浪費(fei),其(qi)熱值相(xiang)當于3億(yi)(yi)(yi)(yi)t標準(zhun)煤,理(li)論上(shang)可生(sheng)產約750億(yi)(yi)(yi)(yi)m3沼氣。據統計,2007年我國畜(chu)(chu)(chu)牧(mu)糞便實(shi)(shi)物量(liang)為12.47億(yi)(yi)(yi)(yi)t,其(qi)中可開發(fa)部分(fen)總量(liang)為8.84億(yi)(yi)(yi)(yi)t,預計2015年規(gui)模(mo)化糞便實(shi)(shi)物量(liang)將達(da)到32.5億(yi)(yi)(yi)(yi)t。畜(chu)(chu)(chu)牧(mu)糞便資源巨大(da),而且逐年增加,是沼氣產業重要(yao)的(de)原料(liao)來源。

  1.3.3園(yuan)林、林業(ye)廢棄物

  為改善城市(shi)(shi)(shi)(shi)生(sheng)態(tai)環境,我國非常重視(shi)城市(shi)(shi)(shi)(shi)綠(lv)化質(zhi)量(liang)。據資(zi)(zi)料顯示,2011年(nian),我國城市(shi)(shi)(shi)(shi)建成區綠(lv)化覆蓋面積(ji)已(yi)達(da)到161.2萬hm2,綠(lv)化覆蓋率為38.62%。隨(sui)著城市(shi)(shi)(shi)(shi)園林(lin)(lin)(lin)(lin)綠(lv)化業的繁榮,每年(nian)都(dou)有(you)大(da)量(liang)殘枝落葉和(he)草(cao)坪修(xiu)剪廢棄物(wu)(wu)。我國林(lin)(lin)(lin)(lin)地、林(lin)(lin)(lin)(lin)廠(chang)木材加(jia)工殘余料及(ji)樹林(lin)(lin)(lin)(lin)廢棄物(wu)(wu)每年(nian)約有(you)2億(yi)萬t未被利(li)用,不進行妥善處理,極易構成火(huo)災隱患。林(lin)(lin)(lin)(lin)業廢棄物(wu)(wu)、木材加(jia)工剩(sheng)余物(wu)(wu)、園林(lin)(lin)(lin)(lin)綠(lv)化剩(sheng)余物(wu)(wu)資(zi)(zi)源集(ji)中,收集(ji)方便,是可有(you)效開發的重要生(sheng)物(wu)(wu)質(zhi)資(zi)(zi)源。

  1.3.4其他生物(wu)質資源

  工(gong)(gong)業(ye)生(sheng)(sheng)(sheng)產(chan)(chan)有(you)(you)機(ji)廢(fei)棄物、污水及城市生(sheng)(sheng)(sheng)活(huo)餐廚垃(la)圾(ji)等(deng)蘊藏著大量的生(sheng)(sheng)(sheng)物質能(neng)源(yuan)。城市生(sheng)(sheng)(sheng)活(huo)垃(la)圾(ji)中約有(you)(you)30%為(wei)有(you)(you)機(ji)垃(la)圾(ji),我國生(sheng)(sheng)(sheng)活(huo)垃(la)圾(ji)年(nian)(nian)產(chan)(chan)量達2億t,且每(mei)年(nian)(nian)以10%速度增長,對環(huan)境產(chan)(chan)生(sheng)(sheng)(sheng)了嚴重危害。食品加工(gong)(gong)、畜(chu)禽屠殺、水產(chan)(chan)養殖(zhi)和漁業(ye)、制糖(tang)、釀酒、造紙(zhi)等(deng)行業(ye)每(mei)年(nian)(nian)產(chan)(chan)生(sheng)(sheng)(sheng)的有(you)(you)機(ji)廢(fei)棄物非常可觀(guan)。據(ju)不******統計,僅(jin)農產(chan)(chan)品加工(gong)(gong)行業(ye)每(mei)年(nian)(nian)產(chan)(chan)生(sheng)(sheng)(sheng)的廢(fei)棄物可產(chan)(chan)500億m3沼氣(qi)。城市垃(la)圾(ji)、工(gong)(gong)業(ye)生(sheng)(sheng)(sheng)產(chan)(chan)有(you)(you)機(ji)廢(fei)棄物相對比較(jiao)集中,非常利于(yu)搜集。

  另外,我國糧食主(zhu)產區(qu)的(de)陳化(hua)糧也是非(fei)常(chang)可(ke)觀的(de)生(sheng)物質資源(yuan)(yuan),除工(gong)業生(sheng)產外,必要時也可(ke)以(yi)(yi)作為能源(yuan)(yuan)資源(yuan)(yuan)使(shi)用,但(dan)要注意防止“與(yu)人(ren)爭(zheng)糧”。其他的(de)還有甘(gan)蔗、木(mu)薯、菊(ju)芋、高粱等(deng)。在貧瘠土地上可(ke)茂盛生(sheng)長的(de)各(ge)種植物,均為豐富可(ke)開發的(de)生(sheng)物質資源(yuan)(yuan)。吳志莊等(deng)還提出,可(ke)以(yi)(yi)利用我國資源(yuan)(yuan)豐富、分布廣泛(fan)的(de)竹類資源(yuan)(yuan),以(yi)(yi)竹類加(jia)工(gong)剩余物(約占60%)為原料可(ke)以(yi)(yi)生(sheng)產生(sheng)物乙醇,還可(ke)以(yi)(yi)進行(xing)發電。

  2生物質能源的主要(yao)應用技術

  生(sheng)(sheng)(sheng)物質能(neng)源的利用主(zhu)要通過物理法(fa)、化(hua)學(xue)法(fa)和生(sheng)(sheng)(sheng)物法(fa)等技(ji)術手(shou)段,將生(sheng)(sheng)(sheng)物質材料轉化(hua)為工(gong)農業(ye)生(sheng)(sheng)(sheng)產中可直接使(shi)用的能(neng)源物質。從轉化(hua)產品的狀態(tai)(tai)來看,可以有固(gu)態(tai)(tai)能(neng)源、液態(tai)(tai)能(neng)源、氣(qi)(qi)(qi)態(tai)(tai)能(neng)源。固(gu)態(tai)(tai)能(neng)源主(zhu)要為生(sheng)(sheng)(sheng)物質顆(ke)粒;液態(tai)(tai)能(neng)源有生(sheng)(sheng)(sheng)物乙醇、生(sheng)(sheng)(sheng)物柴油(you)、裂解油(you)等;氣(qi)(qi)(qi)態(tai)(tai)能(neng)源有沼氣(qi)(qi)(qi)、氫氣(qi)(qi)(qi)、生(sheng)(sheng)(sheng)物質燃氣(qi)(qi)(qi)等。

  2.1固(gu)態生物質能源(yuan)的(de)應用技術

  2.1.1固(gu)態生物(wu)質能源(yuan)的(de)成(cheng)型機理

  生(sheng)(sheng)(sheng)(sheng)(sheng)物(wu)質(zhi)(zhi)原(yuan)材(cai)料(liao)一般質(zhi)(zhi)地松(song)散(san),含(han)水量大(da),空(kong)間占用量大(da),不易倉儲和運輸,燃(ran)(ran)燒(shao)效(xiao)(xiao)率(lv)(lv)低(di),因(yin)此,大(da)部分生(sheng)(sheng)(sheng)(sheng)(sheng)物(wu)質(zhi)(zhi)原(yuan)材(cai)料(liao)使用前需要處理。一般將生(sheng)(sheng)(sheng)(sheng)(sheng)物(wu)質(zhi)(zhi)原(yuan)材(cai)料(liao)進行干燥、粉(fen)碎或切斷,或首(shou)先(xian)經過炭(tan)化(hua)(hua)工藝(yi),再壓縮,靠原(yuan)料(liao)內(nei)(nei)部的(de)(de)(de)粘結力互相嚙合(he)在一起而成(cheng)型(xing)(xing),從而使松(song)散(san)、多(duo)水分的(de)(de)(de)生(sheng)(sheng)(sheng)(sheng)(sheng)物(wu)質(zhi)(zhi)原(yuan)材(cai)料(liao)變為(wei)(wei)(wei)松(song)弛密(mi)度和強度均較高的(de)(de)(de)固體(ti)成(cheng)型(xing)(xing)燃(ran)(ran)料(liao)或顆(ke)粒(li)狀材(cai)料(liao),便于(yu)運輸,燃(ran)(ran)燒(shao)效(xiao)(xiao)率(lv)(lv)高。通常,生(sheng)(sheng)(sheng)(sheng)(sheng)物(wu)質(zhi)(zhi)材(cai)料(liao)中纖維(wei)素(su)和木質(zhi)(zhi)素(su)的(de)(de)(de)含(han)量影響常溫下顆(ke)粒(li)成(cheng)型(xing)(xing)的(de)(de)(de)難易,成(cheng)型(xing)(xing)燃(ran)(ran)料(liao)的(de)(de)(de)松(song)弛密(mi)度和耐(nai)久性(xing)可(ke)(ke)反映其(qi)性(xing)能(neng)。用于(yu)成(cheng)型(xing)(xing)的(de)(de)(de)生(sheng)(sheng)(sheng)(sheng)(sheng)物(wu)質(zhi)(zhi)原(yuan)材(cai)料(liao)多(duo)為(wei)(wei)(wei)秸稈(gan)、林(lin)場廢棄物(wu)等,也有將畜禽糞便加工為(wei)(wei)(wei)生(sheng)(sheng)(sheng)(sheng)(sheng)物(wu)質(zhi)(zhi)顆(ke)粒(li)物(wu)的(de)(de)(de)。齊菁等研究了稻殼(ke)生(sheng)(sheng)(sheng)(sheng)(sheng)物(wu)質(zhi)(zhi)顆(ke)粒(li)的(de)(de)(de)成(cheng)型(xing)(xing)機(ji)理,用電子顯(xian)微鏡(jing)觀察了顆(ke)粒(li)內(nei)(nei)部結構,成(cheng)型(xing)(xing)效(xiao)(xiao)果好,認為(wei)(wei)(wei)可(ke)(ke)以(yi)作為(wei)(wei)(wei)生(sheng)(sheng)(sheng)(sheng)(sheng)物(wu)質(zhi)(zhi)顆(ke)粒(li)。魏(wei)偉研究了以(yi)油茶(cha)果殼(ke)為(wei)(wei)(wei)原(yuan)料(liao)的(de)(de)(de)固體(ti)燃(ran)(ran)料(liao)成(cheng)型(xing)(xing)規律,并(bing)設計了一條理論上年產4萬(wan)t的(de)(de)(de)顆(ke)粒(li)燃(ran)(ran)料(liao)加工生(sheng)(sheng)(sheng)(sheng)(sheng)產線。錢新鋒提(ti)出,將園林(lin)修剪物(wu)等炭(tan)化(hua)(hua)處理制備生(sheng)(sheng)(sheng)(sheng)(sheng)物(wu)碳,還可(ke)(ke)用于(yu)改善土壤環境。

  2.1.2固態生(sheng)物(wu)質(zhi)能源(yuan)的生(sheng)產設備(bei)

  用于(yu)生(sheng)物質(zhi)原材料成型(xing)的(de)(de)設備有(you)(you)螺旋(xuan)擠壓(ya)(ya)式(shi)(shi)、活塞沖壓(ya)(ya)式(shi)(shi)和模(mo)(mo)壓(ya)(ya)式(shi)(shi)3類(lei)。國內(nei)大部分采(cai)用模(mo)(mo)壓(ya)(ya)式(shi)(shi)生(sheng)產(chan)工藝,主要有(you)(you)冷壓(ya)(ya)成型(xing)、熱壓(ya)(ya)成型(xing)和炭化(hua)成型(xing)。模(mo)(mo)壓(ya)(ya)成型(xing)的(de)(de)優點是(shi)生(sheng)產(chan)效率高(gao),原料適應性強。霍麗麗_2等的(de)(de)研(yan)究為生(sheng)物質(zhi)顆粒燃(ran)(ran)料成型(xing)機具的(de)(de)設計提供了理論(lun)依據(ju),目前,我(wo)國自主研(yan)發的(de)(de)成型(xing)設備已達國際******水平,2013年,江(jiang)蘇新(xin)能源技術有(you)(you)限(xian)公司(si)將(jiang)3.3×107t固體(ti)(ti)成型(xing)燃(ran)(ran)料出(chu)口(kou)至日本(ben),表明我(wo)國固體(ti)(ti)成型(xing)燃(ran)(ran)料已實現規模(mo)(mo)化(hua)生(sheng)產(chan),實現商品化(hua)。

  2.1.3固態(tai)生(sheng)物質能(neng)源(yuan)的缺點

  缺點主要有:常用成(cheng)型(xing)設備生(sheng)產效(xiao)率(lv)低(di)下,原料適應性低(di),能耗高(gao),設備關鍵部(bu)件(jian)(如模(mo)具)磨損快(kuai),因(yin)而發(fa)展速度(du)相對(dui)緩慢。另外(wai),產品(pin)標(biao)準(zhun)化程度(du)低(di),應盡(jin)快(kuai)完善相應生(sheng)產標(biao)準(zhun),使產品(pin)標(biao)準(zhun)化,同(tong)時發(fa)展相應的配套設備,如提供部(bu)件(jian)統一的燃燒爐(lu),以供標(biao)準(zhun)化的成(cheng)型(xing)生(sheng)物質(zhi)燃料得以高(gao)效(xiao)率(lv)地(di)燃燒。

  2.2液態生物質能源的應用技(ji)術

  根據聯合國(guo)能(neng)(neng)源組織(zhi)的(de)(de)(de)評估,地(di)球的(de)(de)(de)石油儲量正在(zai)急劇減少,尋找(zhao)新型液(ye)(ye)體(ti)燃料已日益受到世界各國(guo)的(de)(de)(de)重視。可再生(sheng)(sheng)(sheng)能(neng)(neng)源有太(tai)陽能(neng)(neng)、風(feng)能(neng)(neng)、水能(neng)(neng)、地(di)熱能(neng)(neng)和(he)生(sheng)(sheng)(sheng)物質能(neng)(neng),生(sheng)(sheng)(sheng)物質是可再生(sheng)(sheng)(sheng)能(neng)(neng)源中******可以制得(de)液(ye)(ye)態(tai)能(neng)(neng)源的(de)(de)(de)材料,因此生(sheng)(sheng)(sheng)物質液(ye)(ye)態(tai)能(neng)(neng)源的(de)(de)(de)發(fa)展應是能(neng)(neng)源戰略發(fa)展的(de)(de)(de)******。利用(yong)(yong)生(sheng)(sheng)(sheng)物技(ji)術,在(zai)酶(mei)等微生(sheng)(sheng)(sheng)物的(de)(de)(de)作用(yong)(yong)下,可將(jiang)某些(xie)生(sheng)(sheng)(sheng)物質轉(zhuan)化(hua)為生(sheng)(sheng)(sheng)物質乙(yi)醇及其他化(hua)工原料,也可以利用(yong)(yong)化(hua)學方(fang)法制得(de)生(sheng)(sheng)(sheng)物柴油等燃料,可廣泛應用(yong)(yong)于工農業生(sheng)(sheng)(sheng)產。

  2.2.1生物乙醇的形成機(ji)理(li)

  經歐美等國家的長(chang)期實踐證明(ming),生(sheng)(sheng)(sheng)物(wu)乙(yi)醇(chun)(chun)是(shi)替(ti)代石油的主(zhu)要(yao)選(xuan)擇(ze)。植物(wu)通過光(guang)合(he)作(zuo)(zuo)用(yong)(yong)(yong),將太陽能(neng)儲存于植物(wu)體內(nei),形成生(sheng)(sheng)(sheng)物(wu)質能(neng)。利用(yong)(yong)(yong)生(sheng)(sheng)(sheng)物(wu)技(ji)術,將生(sheng)(sheng)(sheng)物(wu)質能(neng)轉化為(wei)(wei)生(sheng)(sheng)(sheng)物(wu)乙(yi)醇(chun)(chun),作(zuo)(zuo)為(wei)(wei)能(neng)源使用(yong)(yong)(yong)。其(qi)循環(huan)如圖1所示。理論(lun)上(shang),光(guang)合(he)作(zuo)(zuo)用(yong)(yong)(yong)合(he)成1分子(zi)葡(pu)萄糖需(xu)要(yao)6分子(zi)CO2,酒精(jing)發酵和燃(ran)(ran)燒(shao)共(gong)釋放6分子(zi)CO2,所以(yi),酒精(jing)燃(ran)(ran)燒(shao)并不(bu)增加大(da)氣中CO2濃度。工業生(sheng)(sheng)(sheng)產(chan)中,首先將糖類(lei)降解(jie)為(wei)(wei)酸,并在各(ge)種酶(mei)的作(zuo)(zuo)用(yong)(yong)(yong)下轉變為(wei)(wei)乙(yi)醛及CO2,進而再轉變為(wei)(wei)乙(yi)醇(chun)(chun)。作(zuo)(zuo)為(wei)(wei)燃(ran)(ran)料用(yong)(yong)(yong)乙(yi)醇(chun)(chun),乙(yi)醇(chun)(chun)含量要(yao)求達到99.5%,所以(yi)生(sheng)(sheng)(sheng)物(wu)乙(yi)醇(chun)(chun)的生(sheng)(sheng)(sheng)產(chan)過程中對脫水處理要(yao)求嚴(yan)格(ge)。

                       

 

 

2.2.2生物(wu)乙(yi)醇的生產(chan)材料(liao)

  生(sheng)產生(sheng)物乙(yi)醇的材料主要有糖(tang)類、淀粉類和(he)纖維木質素類。在原料方面,美國主要采用玉米生(sheng)產生(sheng)物乙(yi)醇;巴西(xi)是全球******大生(sheng)物乙(yi)醇生(sheng)產國,幾乎(hu)所有生(sheng)物乙(yi)醇都(dou)是用甘蔗生(sheng)產;歐盟以小(xiao)麥和(he)甜(tian)菜為主,中(zhong)國則以玉米、小(xiao)麥、木薯為主。

  根據(ju)《國(guo)(guo)家能(neng)源科技(ji)“十二(er)五”規(gui)劃(hua)》,2010年,我國(guo)(guo)燃料(liao)乙(yi)(yi)醇產(chan)量(liang)為(wei)1.69×106t,2015年將(jiang)再增加3.0×106t。我國(guo)(guo)人(ren)多地少,基本國(guo)(guo)情決定了利(li)用玉米進(jin)(jin)行(xing)醇化(hua)加工生(sheng)(sheng)(sheng)成生(sheng)(sheng)(sheng)物乙(yi)(yi)醇(又(you)稱為(wei)******代(dai)(dai)生(sheng)(sheng)(sheng)物乙(yi)(yi)醇)必(bi)將(jiang)陷(xian)入“與(yu)人(ren)爭糧(liang)、與(yu)糧(liang)爭地”的困境。******代(dai)(dai)生(sheng)(sheng)(sheng)物乙(yi)(yi)醇是將(jiang)秸稈(gan)、木(mu)材中的纖(xian)維素(su)降解(jie)(jie)進(jin)(jin)行(xing)轉化(hua),目前(qian)有濃酸(suan)(suan)水(shui)解(jie)(jie)、稀酸(suan)(suan)水(shui)解(jie)(jie)、酶催化(hua)水(shui)解(jie)(jie)等方法。這些(xie)方法或條件要求苛刻,或效率低、速度慢,或高能(neng)耗、不綠色,所以******代(dai)(dai)生(sheng)(sheng)(sheng)物乙(yi)(yi)醇目前(qian)還停留在技(ji)術研究中試階段。可替代(dai)(dai)******代(dai)(dai)生(sheng)(sheng)(sheng)物乙(yi)(yi)醇原材料(liao)——玉米的甜(tian)高粱、木(mu)薯等非糧(liang)能(neng)源作(zuo)物,可以較好的生(sheng)(sheng)(sheng)成生(sheng)(sheng)(sheng)物乙(yi)(yi)醇,又(you)稱為(wei)1.5代(dai)(dai)生(sheng)(sheng)(sheng)物乙(yi)(yi)醇。

  甜高(gao)粱(liang)和木薯等(deng)可(ke)在(zai)鹽堿地(di)、沙地(di)等(deng)低質土(tu)(tu)地(di)生(sheng)長,產(chan)(chan)量(liang)較(jiao)高(gao),是當前發展(zhan)(zhan)燃料(liao)乙醇的(de)(de)較(jiao)好(hao)原(yuan)料(liao)。目前,我國(guo)(guo)(guo)生(sheng)物乙醇生(sheng)產(chan)(chan)原(yuan)料(liao)主要依(yi)賴陳化(hua)糧,成(cheng)本(ben)過高(gao),需要依(yi)賴國(guo)(guo)(guo)家(jia)補貼。而我國(guo)(guo)(guo)沿海(hai)等(deng)地(di)區尚有(you)大(da)(da)量(liang)低質土(tu)(tu)地(di)未開發利用,可(ke)以發展(zhan)(zhan)種植(zhi)甜高(gao)粱(liang)等(deng)能(neng)(neng)源(yuan)(yuan)作(zuo)物。清華大(da)(da)學研(yan)發的(de)(de)甜高(gao)粱(liang)連(lian)續固體發酵生(sheng)產(chan)(chan)乙醇技(ji)術(shu)具(ju)有(you)國(guo)(guo)(guo)際******水平,將(jiang)推動中國(guo)(guo)(guo)生(sheng)物乙醇能(neng)(neng)源(yuan)(yuan)的(de)(de)發展(zhan)(zhan)。因此,大(da)(da)力開發鹽堿地(di)、沙地(di)等(deng)荒(huang)地(di),研(yan)究種植(zhi)甜高(gao)粱(liang)等(deng)非糧能(neng)(neng)源(yuan)(yuan)作(zuo)物,將(jiang)可(ke)以有(you)效降低1.5代(dai)生(sheng)物乙醇生(sheng)產(chan)(chan)成(cheng)本(ben),促進(jin)產(chan)(chan)業早日商業化(hua)發展(zhan)(zhan)。

  生(sheng)物(wu)乙醇的迅猛發展,使得作(zuo)(zuo)為原料的農(nong)產品的******與能(neng)源(yuan)******緊密相連。能(neng)源(yuan)作(zuo)(zuo)物(wu)******優勢(shi)甚至(zhi)會使森林(lin)草(cao)地逐漸變為能(neng)源(yuan)作(zuo)(zuo)物(wu)的種植(zhi)地,從而對(dui)環境產生(sheng)不利影響。倪紅艷等研究(jiu)發現,當乙醇玉(yu)米需求占產量比(bi)重達到(dao)15%時(shi),玉(yu)米******會大(da)幅上漲(zhang),同時(shi)飼料、工業及(ji)食(shi)用玉(yu)米需求下降幅度也比(bi)較(jiao)大(da),此(ci)時(shi)會對(dui)我國的糧(liang)食(shi)安全形成較(jiao)大(da)壓力。

  若乙(yi)醇玉米占用(yong)耕地(di)過(guo)多(duo),必將影響糧食安(an)全,因此(ci)必須尋找其(qi)他生(sheng)(sheng)物(wu)(wu)質(zhi)原(yuan)(yuan)料(liao)。目前(qian),我國已經形成了“不(bu)與人爭(zheng)糧,不(bu)與糧爭(zheng)地(di)”的基本共識(shi),發(fa)展生(sheng)(sheng)物(wu)(wu)乙(yi)醇開始向“非糧”原(yuan)(yuan)料(liao)轉移,充分利用(yong)農副產品或其(qi)加工剩余物(wu)(wu)。牟曉(xiao)紅等(deng)以花(hua)生(sheng)(sheng)殼為(wei)(wei)原(yuan)(yuan)料(liao),用(yong)混合(he)菌種(zhong)發(fa)酵法提取(qu)生(sheng)(sheng)物(wu)(wu)乙(yi)醇,發(fa)酵得(de)到(dao)的乙(yi)醇轉化(hua)率為(wei)(wei)46.06%,乙(yi)醇得(de)率為(wei)(wei)14.65%。于洪久等(deng)以不(bu)同(tong)的處理方式和反應(ying)(ying)條件提高菊芋生(sheng)(sheng)產生(sheng)(sheng)物(wu)(wu)乙(yi)醇的生(sheng)(sheng)產率。與此(ci)同(tong)時,以海洋(yang)藻類為(wei)(wei)原(yuan)(yuan)料(liao)的第三代生(sheng)(sheng)物(wu)(wu)乙(yi)醇技術的研(yan)發(fa)也正在(zai)(zai)成為(wei)(wei)能源領域關注(zhu)的熱點。張志奇(qi)等(deng)采用(yong)發(fa)酵法,以海帶為(wei)(wei)原(yuan)(yuan)料(liao),在(zai)(zai)實驗室(shi)中(zhong)提取(qu)了生(sheng)(sheng)物(wu)(wu)乙(yi)醇。錢龍等(deng)認為(wei)(wei),篩選厭(yan)氧海藻酸降解菌,并(bing)進行基因工程(cheng)改造,強化(hua)乙(yi)醇生(sheng)(sheng)成途(tu)徑,是一種(zhong)頗(po)有(you)前(qian)景的方案。另外,劉政坤通過(guo)對(dui)甘(gan)蔗渣的酶(mei)解液進行發(fa)酵顯示,滸(hu)苔酶(mei)解液在(zai)(zai)還(huan)原(yuan)(yuan)糖(tang)(tang)利用(yong)率、葡萄(tao)糖(tang)(tang)利用(yong)率、乙(yi)醇產率方面都比甘(gan)蔗渣高。以滸(hu)苔為(wei)(wei)原(yuan)(yuan)料(liao)發(fa)酵生(sheng)(sheng)產乙(yi)醇展現了良好應(ying)(ying)用(yong)前(qian)景。

  2.2.3生(sheng)物(wu)乙醇的應用

  生物(wu)(wu)乙(yi)醇(chun)(chun)除了做燃料乙(yi)醇(chun)(chun)外,還(huan)可(ke)以(yi)用于工(gong)業(ye)生產。乙(yi)烯(xi)是(shi)一種重要的(de)化(hua)工(gong)產品,需(xu)求量很(hen)大。長期以(yi)來,乙(yi)烯(xi)的(de)生產嚴重依賴于化(hua)石(shi)能(neng)源。化(hua)石(shi)能(neng)源危機迫使(shi)乙(yi)烯(xi)的(de)生產選擇(ze)新的(de)生產原(yuan)料,而利(li)用生物(wu)(wu)乙(yi)醇(chun)(chun)制備乙(yi)烯(xi)則(ze)是(shi)一個(ge)很(hen)好的(de)方向(xiang)。生昌國等認為,生物(wu)(wu)乙(yi)醇(chun)(chun)制作(zuo)乙(yi)烯(xi)條件溫和,具有勢(shi)不可(ke)擋的(de)優勢(shi),成(cheng)本(ben)低,綠色環保,是(shi)一條可(ke)持續發展(zhan)的(de)化(hua)工(gong)路線。

  2.2.4生物柴油(you)的(de)生產(chan)技術

  生物(wu)柴油(you)的(de)(de)主(zhu)(zhu)要成(cheng)分是脂(zhi)肪酸甲酯(zhi)。工業(ye)上(shang)生產(chan)生物(wu)柴油(you)主(zhu)(zhu)要有物(wu)理(li)法和化(hua)(hua)學(xue)法。物(wu)理(li)法又有混合法和乳化(hua)(hua)法之(zhi)分,化(hua)(hua)學(xue)法主(zhu)(zhu)要有酯(zhi)交(jiao)換反應、高(gao)溫熱裂解及(ji)酶催化(hua)(hua)等(deng)方(fang)法。酯(zhi)交(jiao)換反應所需生物(wu)質原料要求(qiu)不(bu)(bu)高(gao),生產(chan)成(cheng)本相對較(jiao)低,應用廣泛,工業(ye)生產(chan)多采(cai)用這種(zhong)(zhong)方(fang)式。但(dan)酯(zhi)交(jiao)換反應過(guo)程存在副產(chan)物(wu)復雜(za)、可(ke)造成(cheng)二次(ci)污染等(deng)問題,生物(wu)柴油(you)替代燃料模型和反應機(ji)理(li)尚不(bu)(bu)明確,是生物(wu)柴油(you)發展的(de)(de)一個(ge)瓶頸。但(dan)生物(wu)柴油(you)在很多方(fang)面(mian)具有化(hua)(hua)石柴油(you)所不(bu)(bu)及(ji)的(de)(de)優勢,如潤滑性能,燃燒(shao)性能等(deng),是一種(zhong)(zhong)可(ke)再生清(qing)潔(jie)能源。

  2.2.5生物柴油(you)的生物質材料

  起(qi)初的(de)(de)(de)生(sheng)物(wu)(wu)(wu)柴油(you)(you)(you)(you)是以(yi)(yi)油(you)(you)(you)(you)料(liao)植物(wu)(wu)(wu)的(de)(de)(de)果實、種子、植物(wu)(wu)(wu)導(dao)管乳汁油(you)(you)(you)(you)酯(如大豆、菜籽(zi)(zi)(zi)(zi)、棉(mian)(mian)籽(zi)(zi)(zi)(zi)等)及部分(fen)(fen)含油(you)(you)(you)(you)量較(jiao)高的(de)(de)(de)******植物(wu)(wu)(wu)和餐廚垃(la)圾、動(dong)物(wu)(wu)(wu)油(you)(you)(you)(you)脂(zhi)等為原料(liao),通過酯交換反應(ying)工(gong)藝制成。生(sheng)物(wu)(wu)(wu)柴油(you)(you)(you)(you)的(de)(de)(de)原料(liao)可(ke)來自于(yu)動(dong)、植物(wu)(wu)(wu)油(you)(you)(you)(you)脂(zhi),也可(ke)來自于(yu)各種廢棄(qi)食用油(you)(you)(you)(you)、地溝油(you)(you)(you)(you)、化石柴油(you)(you)(you)(you)的(de)(de)(de)回收(shou)再利用。我(wo)國(guo)工(gong)業化生(sheng)產生(sheng)物(wu)(wu)(wu)柴油(you)(you)(you)(you)主要以(yi)(yi)菜籽(zi)(zi)(zi)(zi)油(you)(you)(you)(you)、棉(mian)(mian)籽(zi)(zi)(zi)(zi)油(you)(you)(you)(you)、烏桕油(you)(you)(you)(you)、木油(you)(you)(you)(you)、茶(cha)油(you)(you)(you)(you)和地溝油(you)(you)(you)(you)為原料(liao)制備。胡南(nan)方地區是我(wo)國(guo)非糧生(sheng)物(wu)(wu)(wu)柴油(you)(you)(you)(you)能源(yuan)植物(wu)(wu)(wu)的(de)(de)(de)分(fen)(fen)布(bu)中心,83.9%以(yi)(yi)上生(sheng)物(wu)(wu)(wu)柴油(you)(you)(you)(you)能源(yuan)植物(wu)(wu)(wu)分(fen)(fen)布(bu)在此。

  近些(xie)年(nian)又提(ti)出(chu)了微(wei)(wei)(wei)(wei)藻(zao)(zao)生(sheng)(sheng)(sheng)物(wu)(wu)柴油(you)(you)(you),利用海水培養的(de)微(wei)(wei)(wei)(wei)藻(zao)(zao)含油(you)(you)(you)量(liang)很(hen)高(gao),產(chan)(chan)(chan)量(liang)大(da),生(sheng)(sheng)(sheng)產(chan)(chan)(chan)綠色無污染,已成為(wei)生(sheng)(sheng)(sheng)物(wu)(wu)柴油(you)(you)(you)產(chan)(chan)(chan)業(ye)技術(shu)研究(jiu)的(de)熱(re)點。美國是(shi)(shi)(shi)開發(fa)微(wei)(wei)(wei)(wei)藻(zao)(zao)生(sheng)(sheng)(sheng)物(wu)(wu)柴油(you)(you)(you)起步(bu)***早的(de)國家。微(wei)(wei)(wei)(wei)藻(zao)(zao)為(wei)原(yuan)料制(zhi)(zhi)備(bei)生(sheng)(sheng)(sheng)物(wu)(wu)柴油(you)(you)(you)具有(you)培養周期短(duan)、產(chan)(chan)(chan)油(you)(you)(you)效率高(gao)、油(you)(you)(you)脂(zhi)質(zhi)量(liang)好、環保、節省(sheng)土(tu)地(di),改(gai)造空(kong)間大(da)等(deng)優(you)點。_5微(wei)(wei)(wei)(wei)藻(zao)(zao)易養易收,不(bu)與(yu)糧(liang)食作(zuo)物(wu)(wu)、經濟(ji)作(zuo)物(wu)(wu)爭地(di),含脂(zhi)肪酸等(deng)生(sheng)(sheng)(sheng)物(wu)(wu)質(zhi)能(neng)巨大(da),是(shi)(shi)(shi)新型生(sheng)(sheng)(sheng)物(wu)(wu)柴油(you)(you)(you)原(yuan)料油(you)(you)(you)源之(zhi)一(yi),也(ye)是(shi)(shi)(shi)未(wei)來生(sheng)(sheng)(sheng)物(wu)(wu)柴油(you)(you)(you)發(fa)展的(de)趨勢之(zhi)一(yi)。國內(nei)外微(wei)(wei)(wei)(wei)藻(zao)(zao)生(sheng)(sheng)(sheng)物(wu)(wu)柴油(you)(you)(you)大(da)多處于(yu)試驗階(jie)段,制(zhi)(zhi)約微(wei)(wei)(wei)(wei)藻(zao)(zao)生(sheng)(sheng)(sheng)產(chan)(chan)(chan)生(sheng)(sheng)(sheng)物(wu)(wu)柴油(you)(you)(you)工業(ye)化的(de)一(yi)個重要原(yuan)因是(shi)(shi)(shi)原(yuan)料成本高(gao),生(sheng)(sheng)(sheng)物(wu)(wu)柴油(you)(you)(you)生(sheng)(sheng)(sheng)產(chan)(chan)(chan)成本的(de)75%來自(zi)于(yu)原(yuan)料成本,在******上,利用微(wei)(wei)(wei)(wei)藻(zao)(zao)生(sheng)(sheng)(sheng)產(chan)(chan)(chan)的(de)生(sheng)(sheng)(sheng)物(wu)(wu)柴油(you)(you)(you)與(yu)化石柴油(you)(you)(you)相比沒有(you)優(you)勢。因此,降低微(wei)(wei)(wei)(wei)藻(zao)(zao)產(chan)(chan)(chan)油(you)(you)(you)成本仍是(shi)(shi)(shi)重要的(de)研究(jiu)方向。

  2.3氣(qi)態生物質能源的應用(yong)技術

  2.3.1氣態生(sheng)物質能(neng)源的(de)生(sheng)成(cheng)機理

  氣(qi)態生(sheng)(sheng)(sheng)(sheng)物(wu)(wu)質(zhi)能源(yuan)(yuan)生(sheng)(sheng)(sheng)(sheng)產(chan)方法(fa)包括生(sheng)(sheng)(sheng)(sheng)物(wu)(wu)發(fa)酵(jiao)法(fa)、生(sheng)(sheng)(sheng)(sheng)物(wu)(wu)質(zhi)氣(qi)化法(fa)。生(sheng)(sheng)(sheng)(sheng)物(wu)(wu)質(zhi)在厭氧或(huo)缺(que)氧的(de)條件(jian)下,添(tian)加合適的(de)酶、菌(jun)等,便可發(fa)酵(jiao)為(wei)沼(zhao)(zhao)氣(qi)。沼(zhao)(zhao)氣(qi)的(de)主要(yao)成(cheng)分是甲烷(wan),沼(zhao)(zhao)氣(qi)的(de)產(chan)生(sheng)(sheng)(sheng)(sheng)是微(wei)生(sheng)(sheng)(sheng)(sheng)物(wu)(wu)新陳代謝的(de)結果,微(wei)生(sheng)(sheng)(sheng)(sheng)物(wu)(wu)從生(sheng)(sheng)(sheng)(sheng)物(wu)(wu)質(zhi)材料中吸收(shou)能量,生(sheng)(sheng)(sheng)(sheng)成(cheng)甲烷(wan)、二氧化碳(tan)。生(sheng)(sheng)(sheng)(sheng)產(chan)沼(zhao)(zhao)氣(qi)的(de)原(yuan)材料主要(yao)為(wei)秸稈、畜禽糞便等。尹藝冉等對生(sheng)(sheng)(sheng)(sheng)物(wu)(wu)能源(yuan)(yuan)產(chan)生(sheng)(sheng)(sheng)(sheng)的(de)熱值進行了分析(xi),表明(ming)厭氧產(chan)甲烷(wan)過程(cheng)更適于水生(sheng)(sheng)(sheng)(sheng)植物(wu)(wu)的(de)資源(yuan)(yuan)化。

  對生(sheng)(sheng)物質(zhi)(zhi)進行高(gao)溫熱(re)解,即生(sheng)(sheng)物質(zhi)(zhi)在常壓或(huo)加壓的(de)條件下(xia),溫度(du)在700℃甚至更高(gao)時,通(tong)人適量的(de)氧(yang)(yang)氣(qi)(qi)或(huo)空氣(qi)(qi)介質(zhi)(zhi),生(sheng)(sheng)物質(zhi)(zhi)可(ke)(ke)熱(re)裂解,生(sheng)(sheng)成含有(you)一氧(yang)(yang)化(hua)碳(tan)、氫氣(qi)(qi)、甲烷、CmHn等可(ke)(ke)燃混合氣(qi)(qi)體(ti)和二(er)(er)氧(yang)(yang)化(hua)碳(tan)、氮氣(qi)(qi)等不可(ke)(ke)燃氣(qi)(qi)體(ti)。這(zhe)種氣(qi)(qi)體(ti)稱為生(sheng)(sheng)物質(zhi)(zhi)燃氣(qi)(qi),純化(hua)后(hou)可(ke)(ke)以供(gong)車輛驅動使用。生(sheng)(sheng)物質(zhi)(zhi)氣(qi)(qi)化(hua)制氫是(shi)由低品位(wei)的(de)一次(ci)能源(yuan)(yuan)(生(sheng)(sheng)物質(zhi)(zhi)能)向高(gao)品位(wei)的(de)二(er)(er)次(ci)能源(yuan)(yuan)(氫能)的(de)高(gao)效轉(zhuan)化(hua)。

  另外還有等離(li)子(zi)體熱解氣(qi)化生物(wu)質(zhi)、熔(rong)融金屬氣(qi)化生物(wu)質(zhi)等新技(ji)術(shu),制得的可燃氣(qi)體不含焦油,質(zhi)量優良,但有的能耗很高(gao),或(huo)部分生產技(ji)術(shu)問題(ti)未解決,目前(qian)仍在研發階段,未規模推廣。

  2.3.2氣態生物質能源的生產(chan)設備與工藝

  目前,生物質(zhi)氣(qi)(qi)(qi)(qi)(qi)化(hua)(hua)裝(zhuang)置主(zhu)要有固定床(chuang)(chuang)氣(qi)(qi)(qi)(qi)(qi)化(hua)(hua)爐(lu)、流(liu)化(hua)(hua)床(chuang)(chuang)氣(qi)(qi)(qi)(qi)(qi)化(hua)(hua)爐(lu)和氣(qi)(qi)(qi)(qi)(qi)流(liu)床(chuang)(chuang)氣(qi)(qi)(qi)(qi)(qi)化(hua)(hua)爐(lu),熱解(jie)氣(qi)(qi)(qi)(qi)(qi)化(hua)(hua)爐(lu)技術成(cheng)(cheng)熟的(de)主(zhu)要有固定床(chuang)(chuang)和流(liu)化(hua)(hua)床(chuang)(chuang)2種,工(gong)藝分單(dan)(dan)床(chuang)(chuang)工(gong)藝和雙床(chuang)(chuang)工(gong)藝,單(dan)(dan)床(chuang)(chuang)工(gong)藝較為簡(jian)單(dan)(dan),成(cheng)(cheng)本低(di),能耗低(di),但(dan)生成(cheng)(cheng)氣(qi)(qi)(qi)(qi)(qi)體在氣(qi)(qi)(qi)(qi)(qi)化(hua)(hua)爐(lu)內(nei)停(ting)留時(shi)間(jian)過短,焦油(you)(you)(you)裂(lie)解(jie)不充(chong)分,使(shi)得(de)生成(cheng)(cheng)氣(qi)(qi)(qi)(qi)(qi)體中所(suo)含(han)焦油(you)(you)(you)量(liang)大。焦油(you)(you)(you)通常在800℃以上2~3S內(nei)即可裂(lie)解(jie),因此,提高氣(qi)(qi)(qi)(qi)(qi)化(hua)(hua)爐(lu)溫度、增加含(han)焦油(you)(you)(you)氣(qi)(qi)(qi)(qi)(qi)體在氣(qi)(qi)(qi)(qi)(qi)化(hua)(hua)爐(lu)內(nei)停(ting)留時(shi)間(jian),可進一步減少所(suo)得(de)氣(qi)(qi)(qi)(qi)(qi)體的(de)焦油(you)(you)(you)含(han)量(liang)。雙床(chuang)(chuang)工(gong)藝則增加了一個(ge)氣(qi)(qi)(qi)(qi)(qi)化(hua)(hua)爐(lu),延長焦油(you)(you)(you)在氣(qi)(qi)(qi)(qi)(qi)化(hua)(hua)爐(lu)停(ting)留時(shi)間(jian),使(shi)得(de)焦油(you)(you)(you)進一步裂(lie)解(jie),但(dan)增加的(de)氣(qi)(qi)(qi)(qi)(qi)化(hua)(hua)爐(lu)需要單(dan)(dan)獨加熱升(sheng)溫,由(you)此也(ye)增加了能耗,使(shi)成(cheng)(cheng)本上升(sheng)。

  2.3.3氣(qi)態(tai)生物(wu)質(zhi)能源(yuan)的應(ying)用(yong)于推廣(guang)

  沼(zhao)氣(qi)和天然(ran)氣(qi)的主要成(cheng)分都(dou)是甲(jia)烷(wan)(wan),不(bu)同在于甲(jia)烷(wan)(wan)含量。沼(zhao)氣(qi)一般(ban)含甲(jia)烷(wan)(wan)60%,天然(ran)氣(qi)為(wei)90%,純化至97%即為(wei)車用天然(ran)氣(qi),因此沼(zhao)氣(qi)純化后可同天然(ran)氣(qi)相媲(pi)美,又(you)稱為(wei)生物天然(ran)氣(qi),用途廣泛。在國外,生物天然(ran)氣(qi)用于熱電聯產、汽車燃料均(jun)已多年(nian)。

  我(wo)國(guo)生(sheng)物質(zhi)(zhi)氣(qi)(qi)(qi)化(hua)(hua)(hua)產(chan)業(ye)(ye)(ye)在(zai)(zai)應(ying)(ying)用(yong)(yong)(yong)方面主要為氣(qi)(qi)(qi)化(hua)(hua)(hua)發電農(nong)村(cun)氣(qi)(qi)(qi)化(hua)(hua)(hua)供(gong)(gong)氣(qi)(qi)(qi)。沼(zhao)(zhao)(zhao)(zhao)氣(qi)(qi)(qi)生(sheng)產(chan)工藝簡單,原材(cai)料廣(guang)泛,因其生(sheng)產(chan)成本低而廣(guang)泛的(de)(de)應(ying)(ying)用(yong)(yong)(yong)于(yu)農(nong)村(cun)生(sheng)產(chan)生(sheng)活(huo)。我(wo)國(guo)多地農(nong)村(cun)都建有小型戶用(yong)(yong)(yong)沼(zhao)(zhao)(zhao)(zhao)氣(qi)(qi)(qi)池,如山東(dong)萊西、膠州等(deng)地,通過管道(dao)和專用(yong)(yong)(yong)沼(zhao)(zhao)(zhao)(zhao)氣(qi)(qi)(qi)爐(lu)進行(xing)炊事或取暖。另外(wai),沼(zhao)(zhao)(zhao)(zhao)氣(qi)(qi)(qi)池中的(de)(de)沼(zhao)(zhao)(zhao)(zhao)渣還(huan)可(ke)以肥田,沼(zhao)(zhao)(zhao)(zhao)液(ye)可(ke)以用(yong)(yong)(yong)作飼料添(tian)加劑等(deng),由此,在(zai)(zai)增加了農(nong)民(min)(min)收入(ru)的(de)(de)情況下,又有效(xiao)減少了農(nong)民(min)(min)化(hua)(hua)(hua)肥等(deng)的(de)(de)支出。生(sheng)物質(zhi)(zhi)氣(qi)(qi)(qi)化(hua)(hua)(hua)集中供(gong)(gong)氣(qi)(qi)(qi)技(ji)術在(zai)(zai)我(wo)國(guo)也被廣(guang)泛應(ying)(ying)用(yong)(yong)(yong),我(wo)國(guo)******個生(sheng)物質(zhi)(zhi)氣(qi)(qi)(qi)化(hua)(hua)(hua)集中供(gong)(gong)氣(qi)(qi)(qi)項目位于(yu)山東(dong)省桓臺縣東(dong)潘(pan)村(cun),1994年建成并投產(chan)。工業(ye)(ye)(ye)用(yong)(yong)(yong)大型沼(zhao)(zhao)(zhao)(zhao)氣(qi)(qi)(qi)廠(chang)可(ke)用(yong)(yong)(yong)于(yu)發電、規(gui)模(mo)供(gong)(gong)暖,效(xiao)益(yi)可(ke)觀(guan)。另外(wai),2011年,廣(guang)西南寧已進行(xing)了車用(yong)(yong)(yong)天(tian)然(ran)氣(qi)(qi)(qi)的(de)(de)商業(ye)(ye)(ye)化(hua)(hua)(hua)運行(xing)。曾中華還(huan)探索了將生(sheng)物質(zhi)(zhi)氣(qi)(qi)(qi)化(hua)(hua)(hua)技(ji)術應(ying)(ying)用(yong)(yong)(yong)在(zai)(zai)工業(ye)(ye)(ye)窯(yao)爐(lu)中。

  2.3.4氣態(tai)生物質能源的缺點

  在氣(qi)(qi)化過程中,因生物(wu)質(zhi)(zhi)材料中含(han)有少(shao)量的(de)氮(氣(qi)(qi)化爐(lu)中通入空氣(qi)(qi)作為介質(zhi)(zhi)時也會增加含(han)氮量)、硫(liu)及部分(fen)金屬元素,使(shi)氣(qi)(qi)化產生焦(jiao)油(you),從而(er)導致氣(qi)(qi)化爐(lu)或者使(shi)用氣(qi)(qi)態資源的(de)設備管道易被焦(jiao)油(you)堵(du)塞。雖然可通過提高(gao)熱解溫度(du)的(de)方式(shi)減(jian)少(shao)焦(jiao)油(you),但(dan)又(you)會造成高(gao)能耗,增加成本。

  發展生物(wu)質(zhi)(zhi)液(ye)態(tai)能(neng)源和氣態(tai)能(neng)源是化(hua)石能(neng)源替代的(de)(de)戰略******。氣態(tai)能(neng)源和液(ye)態(tai)能(neng)源產(chan)品中(zhong)常含有雜質(zhi)(zhi),不利于工農(nong)業生產(chan)中(zhong)能(neng)源的(de)(de)利用,如焦(jiao)油等,增(zeng)加了(le)生物(wu)質(zhi)(zhi)能(neng)源使(shi)用成本。目前已有很多(duo)研究來提(ti)高(gao)生物(wu)質(zhi)(zhi)產(chan)品的(de)(de)利用率,如對生物(wu)質(zhi)(zhi)進行(xing)預處理,改變其物(wu)理化(hua)學性(xing)質(zhi)(zhi),從而使(shi)各種反(fan)應向著有利方向進行(xing),以逐步提(ti)高(gao)氣態(tai)、液(ye)態(tai)能(neng)源的(de)(de)利用效率。

  3總結與(yu)展望

  將生(sheng)(sheng)(sheng)(sheng)物質(zhi)材料轉化(hua)為工(gong)農業生(sheng)(sheng)(sheng)(sheng)產中可(ke)直接使用的(de)能源物質(zhi),方(fang)法(fa)(fa)主要(yao)(yao)有物理法(fa)(fa)、化(hua)學(xue)法(fa)(fa)和生(sheng)(sheng)(sheng)(sheng)物法(fa)(fa)。物理法(fa)(fa)主要(yao)(yao)為粉碎和加(jia)熱,工(gong)藝簡單,但(dan)耗(hao)能較高,生(sheng)(sheng)(sheng)(sheng)物法(fa)(fa)是進(jin)行(xing)微(wei)生(sheng)(sheng)(sheng)(sheng)物降解(jie),處理時間相(xiang)對(dui)較長,化(hua)學(xue)法(fa)(fa)主要(yao)(yao)通(tong)過與酸或堿的(de)化(hua)學(xue)反應,相(xiang)對(dui)耗(hao)能低,反應快(kuai),但(dan)工(gong)藝相(xiang)對(dui)復雜,副產物復雜。

  生(sheng)(sheng)(sheng)物(wu)(wu)質能(neng)源(yuan)是綠色(se)、可再生(sheng)(sheng)(sheng)能(neng)源(yuan),蘊藏量巨大,分布廣泛。只要有(you)陽光(guang)照射,綠色(se)植物(wu)(wu)光(guang)合(he)作用***不會停止,生(sheng)(sheng)(sheng)物(wu)(wu)質能(neng)則不會枯竭。生(sheng)(sheng)(sheng)物(wu)(wu)質能(neng)源(yuan)又是可再生(sheng)(sheng)(sheng)能(neng)源(yuan)中******可以(yi)儲存與運輸(shu)的能(neng)源(yuan),這(zhe)給能(neng)源(yuan)轉換和連續(xu)利用帶(dai)來方(fang)便(bian)。我國生(sheng)(sheng)(sheng)物(wu)(wu)質資源(yuan)儲量豐(feng)富,但有(you)效利用率還很低。

  化石(shi)能(neng)(neng)源(yuan)正(zheng)一步步走向枯竭,而我(wo)國的(de)(de)能(neng)(neng)源(yuan)消費又逐年(nian)遞增,2010年(nian)中(zhong)(zhong)國煤炭消費量已(yi)占到全球消費總(zong)量的(de)(de)48.3%,能(neng)(neng)源(yuan)安全問題已(yi)經迫(po)在(zai)眉睫。化石(shi)能(neng)(neng)源(yuan)的(de)(de)集中(zhong)(zhong)大(da)量使用給(gei)環境(jing)和生(sheng)(sheng)(sheng)態帶來了巨大(da)的(de)(de)影響,近幾年(nian)霧霾天氣(qi)逐年(nian)增多(duo),日益(yi)嚴重,十(shi)八大(da)報告也(ye)已(yi)明確提(ti)出,要求大(da)力(li)推進生(sheng)(sheng)(sheng)態文明建設,因此(ci),尋找取代化石(shi)能(neng)(neng)源(yuan)的(de)(de)清潔的(de)(de)、可再生(sheng)(sheng)(sheng)能(neng)(neng)源(yuan)刻不容緩,發展生(sheng)(sheng)(sheng)物質能(neng)(neng)源(yuan)也(ye)是我(wo)國促進克霾減排(pai)、保護生(sheng)(sheng)(sheng)態環境(jing)的(de)(de)有效手(shou)段。

  發(fa)展生(sheng)(sheng)(sheng)(sheng)物(wu)質(zhi)能(neng)(neng)(neng)(neng)源,不僅可(ke)以部分替代(dai)化石(shi)能(neng)(neng)(neng)(neng)源,改(gai)善(shan)生(sheng)(sheng)(sheng)(sheng)態(tai)環(huan)境(jing),更在于生(sheng)(sheng)(sheng)(sheng)物(wu)質(zhi)能(neng)(neng)(neng)(neng)源產業(ye)(ye)的(de)發(fa)展可(ke)以形(xing)成(cheng)很長的(de)產業(ye)(ye)鏈。生(sheng)(sheng)(sheng)(sheng)物(wu)質(zhi)通(tong)常分散于各(ge)(ge)地,不集中(zhong),且與(yu)季節、氣候有關,這些因(yin)素(su)給生(sheng)(sheng)(sheng)(sheng)物(wu)質(zhi)原料的(de)集中(zhong)帶(dai)來了不少(shao)(shao)麻煩。因(yin)此,生(sheng)(sheng)(sheng)(sheng)物(wu)質(zhi)能(neng)(neng)(neng)(neng)源的(de)開(kai)發(fa)與(yu)利(li)用(yong)(yong),涉及(ji)到農(nong)業(ye)(ye)、交(jiao)通(tong)運(yun)輸、工(gong)業(ye)(ye)、通(tong)信、環(huan)保、能(neng)(neng)(neng)(neng)源等多行業(ye)(ye),使得(de)生(sheng)(sheng)(sheng)(sheng)物(wu)質(zhi)源材料的(de)種植與(yu)養殖(zhi)、收集、運(yun)輸、倉儲、管理等相關行業(ye)(ye)得(de)以相應發(fa)展,各(ge)(ge)環(huan)節都是生(sheng)(sheng)(sheng)(sheng)物(wu)質(zhi)能(neng)(neng)(neng)(neng)源開(kai)發(fa)利(li)用(yong)(yong)中(zhong)必(bi)不可(ke)少(shao)(shao)的(de)。因(yin)此,生(sheng)(sheng)(sheng)(sheng)物(wu)質(zhi)能(neng)(neng)(neng)(neng)源開(kai)發(fa)利(li)用(yong)(yong)必(bi)將帶(dai)動各(ge)(ge)產業(ye)(ye)協同統一發(fa)展。

  原材料大(da)量來(lai)源于(yu)農(nong)林畜牧(mu)業(ye)(ye),生(sheng)物質(zhi)資(zi)源的利用將是農(nong)業(ye)(ye)經(jing)(jing)濟(ji)(ji)一個(ge)(ge)新(xin)的經(jing)(jing)濟(ji)(ji)增(zeng)長點,必(bi)將直接帶(dai)動農(nong)村(cun)經(jing)(jing)濟(ji)(ji)迅速發(fa)展,推動新(xin)農(nong)村(cun)建設的進程。因此,積極發(fa)展生(sheng)物質(zhi)能源既可(ke)以(yi)解決國家(jia)能源安全(quan)問題,又可(ke)以(yi)有效改善生(sheng)態環(huan)境,還可(ke)以(yi)為農(nong)林畜牧(mu)業(ye)(ye)廢棄物增(zeng)值,增(zeng)加經(jing)(jing)濟(ji)(ji)收入,催生(sheng)新(xin)的產業(ye)(ye)鏈,是一個(ge)(ge)一舉(ju)多得的國家(jia)戰(zhan)略。