摘要
目前煤气化渣尚未得到有效利用,多采用填埋或堆积处理。随着煤气化渣堆存量的增加,其伴随的资源浪费及环境污染问题越来越突出。因此,迫切需要寻找高效合理的气化渣利用方式。介绍了煤气化渣的形成过程,综述了煤气化渣在建筑材料、土壤改良、吸附材料、残炭利用和催化剂载体等方面的研究现状。其中,建筑材料按照胶凝材料、砖墙材料和陶粒3个部分展开综述。对吸附材料的综述包括废水处理和CO_(2)吸附。残炭利用介绍了用于掺烧和催化石墨化及吸收电磁波等。最后提出了一种综合利用思路:残炭与灰渣分开利用,残炭可作为活性炭和电磁波吸收剂原料,灰渣的利用根据浸出液中重金属含量来综合确认:若毒性超标可通过免烧法制陶粒,毒性不超标则可根据其组分选择制沸石或用作胶凝材料添加剂。
At present,coal gasification slag(CGS)has not been effectively utilized,and it is still mainly piled or landfilled.With the increase in CGS accumulation,the problems of resource waste and environmental pollution become more and more prominent.Therefore,it is urgent to find an efficient and reasonable utilization method for CGS.The formation process of CGS is introduced.The status quo of CGS applied in building materials,soil improvement,adsorption materials,utilization of residual carbon and catalyst carrier are reviewed.Among them,building materials are combed into three parts:cementitious materials,brick wall materials and ceramsite.The review of adsorption materials includes wastewater treatment and CO_(2)adsorption.Utilization of residual carbon includes blending burning,catalytic graphitization,and electromagnetic wave absorption.Finally,a proposal for comprehensive CGS utilization is put forward.The residual carbon can be used separately from the ash residue.The residual carbon can be used as the raw material of activated carbon and electromagnetic wave absorber.The utilization of ash can be divided into two categories based on the heavy metal content in the leaching solution:if the toxicity exceeds the standard,the ceramic particles can be produced by the non-burning method;if the toxicity does not exceed the standard,they can be used to make zeolite or as an additive for cementitious materials according to their composition.
作者
傅文煜
孙文强
王连勇
FU Wenyu;SUN Wenqiang;WANG Lianyong(Department of Thermal Engineering,Northeastern University,Shenyang 110819,China;State Environmental Protection Key Laboratory of Eco-Industry,Northeastern University,Shenyang 110819,China)
出处
《环境工程》
CAS
CSCD
北大核心
2023年第12期319-328,共10页
Environmental Engineering
基金
沈阳市自然科学基金专项(22315613)。
关键词
煤气化渣
建筑材料
土壤改良
吸附材料
残炭利用
催化剂载体
coal gasification slag
building material
soil improvement
adsorption material
utilization of carbon residue
catalyst carriers
