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当前位置:六盒宝典资料免费大全 > 资讯动态 > 行业动态 > 燃煤热风炉生物质节能环保改造可行性分析

燃煤热风炉生物质节能环保改造可行性分析

文章出处:   发布时间:2018-11-17 08:59:05   浏览:10

我国拥有大量成都收账生活和工业燃煤热风炉,燃煤热风炉使用过程中产生成都找人企业SO2、烟尘等污染物,对大气环境造成较大成都收账污染。为加强大气环境收账综合整治,许多城市已逐步对巾小型燃煤热风炉进行淘汰或改造(改燃清洁燃料)。将运行中成都找人企业中小型燃煤热风炉改造成生物质成型燃料热风炉,一方面能有效降低SO2、烟尘的排放量,另一方面可避免改用燃油(气)热风炉带来的经济负担,还对促进可再生能源的发展、实现农业和林业有机废弃物的综合利用、优化能源结构具有重要作用。

China has a large number of living and industrial coal-fired hot blast furnace, the use of coal-fired hot air furnace SO2, smoke and other pollutants, causing great pollution to the atmosphere. In order to strengthen the comprehensive improvement of the atmospheric environment, many cities have gradually eliminated or reformed small coal-fired hot blast stoves (converted to clean fuel). On the one hand, it can effectively reduce the emission of SO2 and smoke, and on the other hand, it can avoid the economic burden of using the fuel (gas) hot blast stove on the one hand, and promote the development of renewable energy and the comprehensive utilization of organic waste in agriculture and forestry. The structure of the chemical energy has an important role. 二、热风炉改造大气污染物排放量分析

Two. Analysis of air pollutants emission from hot blast stove retrofit

(1)生物质成型燃料的特点

(1) characteristics of biomass briquette fuel

生物质成型燃料是指采用农作物剩余物(秸秆、稻壳等)、林业剩余物(采伐加工剩余物、枯枝等)等为原料,通过专门设备在特定工艺条件下压缩成棒状、块状或颗粒状等的燃料。

Biomass briquette is the use of crop residues (straw, rice husk, etc.), forestry remainder (cutting remainder, withered branch, etc.) as raw materials, and compressed into rod like, lumpy or granular fuel through special equipment.

生物质成型燃料与一般工业用煤的主要特性比较可以看出:生物质成犁燃料的热值稍低于煤,1吨生物质成型燃料相当于0.73—0.97吨煤的热值;生物质成型燃料的硫含量大大低于煤,氮和灰份的硫含量稍低于煤,燃烧时产生的SO2大大减少,NOx和烟尘较少。

The comparison of the main characteristics of the biomass briquette and the general industrial coal can be seen that the calorific value of the biomass plow fuel is slightly lower than that of the coal, and the 1 ton biomass briquette is equivalent to the calorific value of 0.73 to 0.97 tons of coal; the sulfur content of the biomass briquette is much lower than that of the coal, and the sulfur content of the nitrogen and ash is slightly lower than that of the coal, and the SO2 produced during the combustion is large. Large reduction, NOx and smoke less.

(2)热风炉改造大气污染物排放情况

(2) transformation of air pollutants by hot air furnace

以1台1t/h燃煤热风炉改造成生物质成型燃料成都找人企业为例,采用《环境统计手册》的成都***烟气中大气污染物排放理论计算公式,分别预测成都***在达到相同工作作出力情况下,热风炉改造前、后烟气中大气污染物排放情况,燃料特性取均值计算,并参考河南省环境枪测中心站对某0.8t/h燃煤热风炉改造成生物质成型燃料热风炉后,热风炉烟气经湿式喷淋除尘后大气污染物浓度监测结果。

Taking 1 1t/h coal-fired hot blast furnaces to transform into a biomass briquette hot blast stove as an example, using the theoretical calculation formula of air pollutant emission from the flue gas of the hot blast stove in the "Environmental Statistics Manual", the emission of air pollutants in the flue gas before and after the hot blast furnace is predicted respectively. The mean value was calculated, and the results of air pollutant concentration monitoring after a 0.8t/h coal fired hot blast stove was transformed into a biomass briquette hot blast stove in Henan Province, and the air pollutant concentration was monitored after the wet spray dust removal.

热风炉改造前、后的预测结果比较可以看出:热风炉在达到相同工作出力情况下,热风炉改造后燃用生物质成型燃料产生的SO2和烟尘均有一定程度的降低,SO2产生量和产生浓度分别减少93%和94%,烟尘产生蹙和产生浓度分别减少29%和42%;NOx污染与改造前相差不大。从热风炉改造后的预测结果和监测结果可以看出:热风炉改造后燃用生物质成型燃料,SO2浓度大大低于《热风炉大气污染物排放标准》(GB13271—2001)Ⅱ时段的最高允许排放浓度。

The comparison of the prediction results before and after the remolding of the hot blast stove shows that when the hot blast stove reaches the same working force, the SO2 and dust produced by the biomass briquette fuel are reduced to a certain extent, the production and concentration of SO2 are reduced by 93% and 94% respectively, and the production and concentration of smoke and dust are reduced by 29, respectively. % and 42%, and NOx pollution is not quite different from that before the transformation. The prediction results and monitoring results after the remolding of the hot blast stove show that the SO2 concentration is much lower than the maximum permissible concentration in the period of the air pollutant discharge standard (GB13271 - 2001) II of the hot blast stove after the remolding of the hot blast stove.

烟尘浓度超标4.86倍,经湿式喷淋除尘,除尘率达83%以上时。可达到排放标准。

The concentration of smoke and dust exceeded 4.86 times, and the dust removal rate reached more than 83% after wet spraying. The discharge standard can be reached.

三、热风炉改造技术性分析

Three. Technical analysis of hot blast furnace transformation

生物质成型燃料经压缩而成。密度高、挥发份溢出速度慢、水分含量人,若现运行中的燃煤热风炉不加改造直接使用生物质成型燃料,热风炉容易出现出力小稳、容易冒黑烟、粉,叠污染等现象。

The biomass briquette is compressed. High density, slow volatilization spillover speed, water content people, if the current operation of coal-fired hot blast furnace without modification directly use biomass briquette fuel, hot blast stove is easy to appear power and small stability, easy to take black smoke, powder, superimposed pollution and so on.

通过改造燃煤热风炉燃烧室和辅助供风系统,主要是采用强制机械通风方式,在热风炉下部增加布风室、增加炉膛二次供风、调节进料斗燃料层厚度等,町解决卜.述不良现象,满足牛物质成型燃料的充分燃烧。经试验,燃煤热风炉改造成生物质成型燃料热风炉后可达到相同的工作出力,热风炉热效率达58%以上。

By reforming the combustion chamber and auxiliary air supply system of the coal-fired hot stove, it is mainly to adopt the forced mechanical ventilation, increase the air distribution room in the lower part of the hot blast stove, increase the two air supply of the furnace, and adjust the thickness of the fuel layer of the hopper, so as to solve the bad phenomenon and satisfy the full combustion of the material of the material of the cow. The test results show that the same output can be achieved after the coal-fired hot blast stove is transformed into a biomass briquette hot blast stove, and the thermal efficiency of the hot blast stove is over 58%.

四、热风炉改造经济性分析

Four. Economic analysis of hot blast furnace transformation

热风炉在达到同力情况下运行的经济性主要取决于燃料的热值、价格和热风炉的热效率,比较热风炉分别以生物质成型燃料、煤、柴油和天然气为燃料的运行成本得出:天然气>柴油>生物质燃料>煤。虽然热风炉燃用生物质成型燃料的运行成本稍高于燃煤,考虑到燃用生物质燃料产生的SO2有较大程度的降低.可减少烟气脱硫的成本;另一方面,煤炭、柴油、天然气等化石能源随着需求持续增长,以及大量开采而逐步衰歇,必然导致价格不断上扬,会带来的一定经济负担。综合比较燃煤热风炉改造成生物质成型燃料热风炉在经济上有一定的竞争优势。

The economy of the hot air furnace running with the same force depends mainly on the calorific value of the fuel, the price and the heat efficiency of the hot air furnace. The comparison of the running cost of the hot blast stove with the fuel of biomass briquette, coal, diesel and natural gas can be compared with the natural gas > diesel > biomass fuel > coal. Although the cost of burning biomass fuel is slightly higher than that of coal, it is necessary to reduce the cost of FGD by taking into account that the SO2 produced by biomass fuel can be reduced greatly. On the other hand, fossil fuels such as coal, diesel and natural gas will continue to grow with the demand and gradually decline with a large amount of exploitation. The economic burden will be brought about by the rising prices. Comprehensive comparison of coal fired hot stove into biomass briquette stove has a certain economic competitive advantage.

五、生物质成型燃料的发展前景及存在问题

Five, development prospects and existing problems of biomass briquette fuel

日前我国农作物秸秆町收集量为6.87亿吨,约3.43亿吨可作为燃料使用;林业剩余物可获得量在8—10亿吨,约3亿吨可作为能源利用。将其两者压缩加工成生物质成型燃料折合可达约3.72亿吨标准煤,实现农业和林业有机废弃物的综合利用。具有一定的社会和经济效益。同时,促进可再生能源的发展,对缓解能源紧张、优化能源结构具有重要作用,资源潜力大、发展前景好。

The collection of crop straw in China is 6.87 billion tons, about 3.43 million tons can be used as fuel, and the availability of forestry residues is 8 to 10 million tons, and about 3 billion tons can be used as energy. Compressing the two into biomass briquette fuels yields about 372 million tons of standard coal, thus realizing the comprehensive utilization of agricultural and forestry organic wastes. It has certain social and economic benefits. At the same time, promoting the development of renewable energy plays an important role in alleviating the energy shortage and optimizing the energy structure, with great potential resources and good prospects for development.

但由于我国生物质成型燃料产业正处在发展初期,市场尚未成熟,质量、价格相差较人,供求不稳定,行业标准还小健全。需要国家有关部门制定相应的配套政策扶持和推动产业发展。

But because of our country's biomass fuel industry is in the early stage of development, the market is not mature, the difference of quality and price is relatively human, the supply and demand is not stable, and the industry standard is still small and sound. Relevant state departments are required to formulate corresponding supporting policies to support and promote industrial development.

六、结论

Six. Conclusion

将运行中的中小型燃煤热风炉改造成燃生物质成型燃料热风炉在经济和技术上可行;可有效降低SO2的排放,烟气经除尘可达到国家排放标准。具有明

It is economically and technically feasible to transform the small and medium coal-fired hot blast furnace into a burning biomass briquette hot blast stove, which can effectively reduce the emission of SO2, and the flue gas can reach the national emission standard by dust removal. Bright


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