金沙国际登录网址【鼠年好运】

您好,欢迎光临金沙国际登录网址官网!为您提供完善的沼气生物脱硫、沼气提纯设备以及服务!欢迎来电!

金沙国际登录网址 - 新闻资讯 >

脱硫脱硝除尘一体化技术的研究!

时间:2020-02-11
网址:
阅读量:
法国LeGazIntegralEnterprise开发了以EDTA为配体的专利技术Sulfint法。ShellOil和DowChemical公司开发了Sulferox法,该法的关键技术在于配体,它容许运用高浓度的络合铁溶液,因此能下降溶液的循环量,还能够脱除气体中的有机硫。
Legaz integral enterprise of France has developed the patent technology sulfur method with EDTA as the ligand. Shell oil and Dow Chemical developed the sulferox method. The key technology of this method is the ligand. It allows the use of high concentration of complex iron solution, so it can reduce the circulation of the solution and remove the organic sulfur in the gas.
国内对络合铁法脱硫进程也进行了较多的研讨,开发了用氨为吸收剂,以磺基水扬酸为配体的FD法;以1-羟基乙川二膦酸(HEDP)和氨三乙酸(NTA)为配体的HEDP-NTA络合铁法;研讨了以三乙醇胺(TEA)作为Fe3+的络合剂和吸收剂,以柠檬酸作为Fe2+的络合剂的二元络合体系;此外还有龙胆酸作为配体的方法。安徽天然气脱硫报价
There are many studies on the process of desulfuration by complexation iron in China, such as FD method with ammonia as absorbent and sulfosalicylic acid as ligand; hedp-nta complexation iron method with HEDP and NTA as ligand; binary complexation system with triethanolamine (tea) as complexing agent and absorbent of Fe3 + and citric acid as complexing agent of Fe2 +; in addition, long Cholic acid as a ligand. Quotation of Anhui Natural Gas Desulfurization
间接石灰石-石膏法
Indirect limestone gypsum method
脱硫工艺技术及分析和特点
Desulfurization technology, analysis and characteristics
常见的间接石灰石-石膏法有:钠碱双碱法、碱性硫酸铝法和稀硫酸吸收法等。
Common indirect limestone gypsum methods include sodium alkali double alkali method, alkaline aluminum sulfate method and dilute sulfuric acid absorption method.
原理:
Principle:
钠碱、碱性氧化铝(Al2O3·nH2O)或稀硫酸(H2SO4)吸收SO2,生成的吸收液与石灰石反应而得以再生,并生成石膏。该法操作简单,二次污染少,无结垢和堵塞问题,脱硫效率高,但是生成的石膏产品质量较差。
Sodium alkali, alkaline alumina (Al2O3 · nH2O) or dilute sulfuric acid (H2SO4) absorb SO2, and the absorption liquid generated reacts with limestone to regenerate and generate gypsum. The method is simple in operation, less secondary pollution, no scaling and blocking problems, high desulfurization efficiency, but the quality of gypsum product is poor.
柠檬吸收法
Lemon absorption method
脱硫工艺技术及分析和特点
Desulfurization technology, analysis and characteristics
原理:
Principle:
柠檬酸(H3C6H5O7·H2O)溶液具有较好的缓冲性能,当SO2气体通过柠檬酸盐液体时,烟气中的SO2与水中H发生反应生成H2SO3络合物,SO2吸收率在99%以上。
Citric acid (h3c6h5o7 · H2O) solution has better buffer performance. When SO2 gas passes through citrate liquid, SO2 in flue gas reacts with h in water to form H2SO3 complex, and SO2 absorption rate is more than 99%.
优缺点:
Advantages and disadvantages:
这种方法仅适于低浓度SO2烟气,而不适于高浓度SO2气体吸收,应用范围比较窄。
This method is only suitable for the flue gas with low concentration of SO2, but not for the absorption of high concentration of SO2.
另外,还有海水脱硫法、磷铵复肥法、液相催化法等湿法烟气脱硫技术。
In addition, there are many wet flue gas desulfurization technologies, such as seawater desulfurization, ammonium phosphate compound fertilizer, liquid-phase catalysis, etc.
络合铁脱硫技术是一种以铁为催化剂的湿式氧化还原脱除硫化物的方法,它的特点是工艺简单、吸收剂无毒,能在液相将H2S转变成元素S,H2S的脱除率可达99%以上。它是一种环保无毒的脱硫技术,克服了传统脱硫工艺硫容量低、脱硫工艺复杂、副盐生成率高、环境污染等弊端,硫黄回收率达到99.99%,净化后的尾气焚烧后烟气二氧化硫含量降低到20mg/Nm3,可满足不断提升的环保指标。
The complex iron desulfurization technology is a wet oxidation-reduction method for sulfide removal with iron as catalyst. It is characterized by simple process, non-toxic absorbent, and the ability to transform H2S into elemental s in the liquid phase. The removal rate of H2S can reach more than 99%. It is an environment-friendly and non-toxic desulfurization technology, which overcomes the disadvantages of the traditional desulfurization process, such as low sulfur capacity, complex desulfurization process, high generation rate of by-salt, environmental pollution, etc. the sulfur recovery rate reaches 99.99%, and the sulfur dioxide content in the flue gas after the purified tail gas incineration is reduced to 20mg / Nm3, which can meet the increasing environmental protection index.
在硫产量<20t/d时,该工艺的设备投资和操作费用具有明显优势,更重要的优点是该工艺在脱除硫化物过程中,几乎不受气源中CO2含量的影响而能达到非常高的净化度。络合铁法处理H2S含量低的气体还有其它显著的优点:集脱硫与硫黄回收为一体,吸收与再生均可在常温下进行,H2S转化为硫氧化物的副反应少。
When the sulfur output is less than 20t / D, the equipment investment and operation cost of the process have obvious advantages, and the more important advantage is that the process can achieve a very high degree of purification in the process of sulfide removal without the influence of CO2 content in the gas source. There are other significant advantages of complex iron method in the treatment of gas with low H2S content: it integrates desulfurization and sulfur recovery, absorption and regeneration can be carried out at room temperature, and the side reaction of H2S conversion to sulfur oxide is less.
脱硫脱硝技术很多且大部分处于研究或工业示范阶段,其中石灰石-石膏湿法脱硫和选择性催化还原干法脱硝技术较为成熟,率先实现了商业化。由于SO2和NOX都是酸性氧化物,同时对他们进行脱除完全可行。由于设备投资小、运行费用低、操作难度小等优点,脱硫脱硝一体化技术成为研究热点。
There are many desulfurization and denitrification technologies and most of them are in the research or industrial demonstration stage. Among them, limestone gypsum wet desulfurization and selective catalytic reduction dry denitrification technologies are relatively mature and take the lead in commercialization. Because SO2 and NOx are acid oxides, it is feasible to remove them at the same time. Due to the advantages of small equipment investment, low operating cost and small operation difficulty, the integrated technology of desulfurization and denitrification has become a research hotspot.
脱硫脱硝一体化主要分为湿法、干法和半干法3种。总的来说:湿法脱除效果好,但废液污染严重;干法脱除效果好,但操作费用高;半干法无污染但操作不稳定。其中常见湿法主要有金属络合物吸收法和氧化剂氧化吸收法;干法包括活性炭吸附法、金属氧化物催化吸收法和等离子体法;半干法主要是吸收剂喷射法。
The integration of desulfurization and denitrification mainly includes wet process, dry process and semi dry process. In general, the wet method has good removal effect, but the waste liquid is seriously polluted; the dry method has good removal effect, but the operation cost is high; the semi dry method has no pollution but the operation is unstable. The main wet methods are metal complex absorption method and oxidant oxidation absorption method; the dry method includes activated carbon absorption method, metal oxide catalytic absorption method and plasma method; the semi dry method is mainly absorbent jet method.
各种各样的烟气脱硫技术在脱除SO2的过程中取得了一定的经济、社会和环保效益,但是还存在一些不足,随着生物技术及高新技术的不断发展,电子束脱硫技术和生物脱硫等一系列高新、适用性强的脱硫技术将会代替传统的脱硫方法。
A variety of flue gas desulfurization technologies have achieved certain economic, social and environmental benefits in the process of SO2 removal, but there are still some shortcomings. With the continuous development of biotechnology and high-tech, a series of high-tech and applicable desulfurization technologies such as electron beam desulfurization technology and biological desulfurization technology will replace the traditional desulfurization methods.
在化石燃料燃烧的过程中,会产生大量的酸性气体,比如二氧化硫、氮氧化物等,这些气体的产生将会对大气造成严重的污染。为了减少有害气体对大气的污染,采用烟气脱硫技术,在传统的烟气脱硫技术中,包含湿法、干法、半干法等,不过,经过多年的研究,一些新的脱硫脱硝技术已经出现,由此有了脱硫脱硝除尘一体化技术的研究。
In the process of fossil fuel combustion, there will be a lot of acid gases, such as sulfur dioxide, nitrogen oxides, etc., which will cause serious pollution to the atmosphere. In order to reduce the pollution of harmful gases to the atmosphere, the flue gas desulfurization technology is adopted. In the traditional flue gas desulfurization technology, including wet method, dry method, semi dry method, etc. However, after years of research, some new desulfurization and denitrification technologies have emerged, so there is the research on the integration of desulfurization, denitrification and dust removal technology.
XML 地图 | Sitemap 地图