CN1120033C - Method for removing sulfur dioxide from flue gas - Google Patents
Method for removing sulfur dioxide from flue gas Download PDFInfo
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- CN1120033C CN1120033C CN 01106635 CN01106635A CN1120033C CN 1120033 C CN1120033 C CN 1120033C CN 01106635 CN01106635 CN 01106635 CN 01106635 A CN01106635 A CN 01106635A CN 1120033 C CN1120033 C CN 1120033C
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- flue gas
- sulfur dioxide
- urea
- aluminum hydroxide
- removing sulfur
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- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 title claims abstract description 52
- 239000003546 flue gas Substances 0.000 title claims abstract description 27
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 26
- 238000000034 method Methods 0.000 title claims abstract description 16
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 claims abstract description 22
- 239000004202 carbamide Substances 0.000 claims abstract description 22
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 claims abstract description 11
- BFNBIHQBYMNNAN-UHFFFAOYSA-N ammonium sulfate Chemical compound N.N.OS(O)(=O)=O BFNBIHQBYMNNAN-UHFFFAOYSA-N 0.000 claims abstract description 7
- 229910052921 ammonium sulfate Inorganic materials 0.000 claims abstract description 7
- 235000011130 ammonium sulphate Nutrition 0.000 claims abstract description 7
- 239000003054 catalyst Substances 0.000 claims abstract description 7
- 238000006243 chemical reaction Methods 0.000 claims description 3
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 2
- 229910052717 sulfur Inorganic materials 0.000 claims description 2
- 239000011593 sulfur Substances 0.000 claims description 2
- 229910021502 aluminium hydroxide Inorganic materials 0.000 claims 3
- 239000000779 smoke Substances 0.000 claims 1
- 239000003337 fertilizer Substances 0.000 abstract description 6
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 abstract description 4
- 150000001875 compounds Chemical class 0.000 abstract description 4
- 229910052757 nitrogen Inorganic materials 0.000 abstract description 2
- 239000010881 fly ash Substances 0.000 description 4
- 238000010521 absorption reaction Methods 0.000 description 3
- 238000012271 agricultural production Methods 0.000 description 3
- 239000002689 soil Substances 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 2
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
- 229910052791 calcium Inorganic materials 0.000 description 2
- 239000011575 calcium Substances 0.000 description 2
- 239000003245 coal Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000000618 nitrogen fertilizer Substances 0.000 description 2
- 229910052698 phosphorus Inorganic materials 0.000 description 2
- 239000011574 phosphorus Substances 0.000 description 2
- 229910052700 potassium Inorganic materials 0.000 description 2
- 239000011591 potassium Substances 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 235000013619 trace mineral Nutrition 0.000 description 2
- 239000011573 trace mineral Substances 0.000 description 2
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- 235000019738 Limestone Nutrition 0.000 description 1
- MXRIRQGCELJRSN-UHFFFAOYSA-N O.O.O.[Al] Chemical compound O.O.O.[Al] MXRIRQGCELJRSN-UHFFFAOYSA-N 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
- 241000607479 Yersinia pestis Species 0.000 description 1
- AZDRQVAHHNSJOQ-UHFFFAOYSA-N alumane Chemical class [AlH3] AZDRQVAHHNSJOQ-UHFFFAOYSA-N 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 125000005521 carbonamide group Chemical group 0.000 description 1
- 238000009264 composting Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000006477 desulfuration reaction Methods 0.000 description 1
- 230000023556 desulfurization Effects 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 238000010894 electron beam technology Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000010440 gypsum Substances 0.000 description 1
- 229910052602 gypsum Inorganic materials 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000012774 insulation material Substances 0.000 description 1
- 238000011031 large-scale manufacturing process Methods 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- 239000006028 limestone Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 235000015097 nutrients Nutrition 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000013535 sea water Substances 0.000 description 1
- 239000008247 solid mixture Substances 0.000 description 1
- 239000002910 solid waste Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Treating Waste Gases (AREA)
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
Abstract
本发明涉及一种脱除烟气中二氧化硫的方法，以氢氧化铝为催化剂，在100～130℃下，使烟气通过尿素，在氢氧化铝的存在下，烟气中的二氧化硫与尿素反应生成硫酸铵而从烟气中脱除。本发明具有占地少、投资少、运行费用不高、无二次污染等优点，二氧化硫的脱除率可达97%以上。脱除产物是一种高含氮及含有多种元素的复合肥料。The invention relates to a method for removing sulfur dioxide in flue gas. Aluminum hydroxide is used as a catalyst to pass flue gas through urea at 100-130°C. In the presence of aluminum hydroxide, sulfur dioxide in flue gas reacts with urea. Generate ammonium sulfate and remove it from the flue gas. The invention has the advantages of less land occupation, less investment, low operating cost, no secondary pollution, etc., and the removal rate of sulfur dioxide can reach more than 97%. The removal product is a compound fertilizer with high nitrogen content and multiple elements.
Description
技术领域technical field
本发明涉及一种脱除烟气中二氧化硫的方法，尤其是从燃煤锅炉烟气中脱除二氧化硫的方法。The invention relates to a method for removing sulfur dioxide in flue gas, in particular to a method for removing sulfur dioxide from coal-fired boiler flue gas.
背景技术Background technique
我国目前的能源结构以煤炭为主。1995年煤炭消耗量为12.8亿吨，二氧化硫排放量达2370万吨。既造成严重的环境污染，又浪费了资源。有资料表明，电站锅炉和中小型锅炉是二氧化硫的排放大户，二者的排放量占整个二氧化硫排放量的80％以上。my country's current energy structure is dominated by coal. In 1995, coal consumption was 1.28 billion tons, and sulfur dioxide emissions reached 23.7 million tons. It not only causes serious environmental pollution, but also wastes resources. According to data, power plant boilers and small and medium-sized boilers are major emitters of sulfur dioxide, and their emissions account for more than 80% of the total sulfur dioxide emissions.
目前，燃煤锅炉烟气二氧化硫的脱除，主要是以石灰石(石灰)——石膏法为主。此外，还有氨吸收法、海水吸收法、电子束法、活性炭吸收法等，这些方法存在的共同缺点是运行费用高、投资费用大、占地面积大、存在二次污染、脱除率较低等。At present, the removal of sulfur dioxide from coal-fired boiler flue gas is mainly based on limestone (lime)-gypsum method. In addition, there are ammonia absorption method, seawater absorption method, electron beam method, activated carbon absorption method, etc. The common disadvantages of these methods are high operating cost, large investment cost, large floor area, secondary pollution, and low removal rate. inferior.
发明内容Contents of the invention
本发明的目的就是提供一种投资较少、运行费用不高、占地面积不大、无二次污染且脱除率较高的脱除烟气中二氧化硫的方法。The purpose of the present invention is to provide a method for removing sulfur dioxide in flue gas with less investment, low operating cost, small floor space, no secondary pollution and high removal rate.
本发明提供的技术方案是：一种脱除烟气中二氧化硫的方法，以氢氧化铝为催化剂，在100～130℃下，使烟气通过尿素，在氢氧化铝的存在下，烟气中的二氧化硫与尿素反应生成硫酸铵而从烟气中脱除；尿素与氢氧化铝投入的重量比为100∶1.5～10。The technical solution provided by the invention is: a method for removing sulfur dioxide in flue gas, using aluminum hydroxide as a catalyst, passing the flue gas through urea at 100-130°C, and in the presence of aluminum hydroxide, the sulfur dioxide in the flue gas The sulfur dioxide reacts with urea to generate ammonium sulfate and is removed from the flue gas; the weight ratio of urea to aluminum hydroxide input is 100:1.5-10.
尿素又称碳酰胺，是高含氮肥料，在常温常压下性质稳定，溶于水。我国有几十套大型生产装置，来源充足，目前市场是供过于求。氢氧化铝是一常见的化工产品，原料丰富、容易生产、价廉、易得。铝盐是土壤主要成分之一，无毒性。Urea, also known as carbonamide, is a high-nitrogen fertilizer that is stable at normal temperature and pressure and soluble in water. There are dozens of large-scale production facilities in our country with sufficient sources, and the current market is oversupplied. Aluminum hydroxide is a common chemical product with abundant raw materials, easy production, low price and easy access. Aluminum salt is one of the main components of soil and is non-toxic.
粉煤灰是燃煤锅炉特有的固体废物，用于农业生产已有几十年历史，可用作土壤改良剂、覆土造田、作物保温材料、制作磷、钾、钙、硅及微量元素肥料、堆肥、防治果树黄叶病等。每公顷施粉煤灰333～1666公斤，增产范围在7.1％～55％，平均10％以上。Fly ash is a solid waste specific to coal-fired boilers. It has been used in agricultural production for decades. It can be used as a soil improver, soil-covering, crop insulation material, phosphorus, potassium, calcium, silicon and trace element fertilizers, Composting, prevention and treatment of fruit tree yellow leaf disease, etc. Apply 333-1666 kg of fly ash per hectare, and the yield increase ranges from 7.1% to 55%, with an average of more than 10%.
尿素和二氧化硫反应生成的硫酸铵也是一种氮肥，其中的硫可被土壤中的微生物分解为农作物、植物所需的营养成分。The ammonium sulfate produced by the reaction of urea and sulfur dioxide is also a kind of nitrogen fertilizer, and the sulfur in it can be decomposed by microorganisms in the soil into nutrients needed by crops and plants.
因此，二氧化硫脱除产物(包括未反应完全剩余的尿素、粉煤灰)是一种含有磷、钾、钙、硅及其它微量元素的复合肥料，用于农业生产，可提高农作物产量，并且有防治病虫害的作用，不污染环境。Therefore, the sulfur dioxide removal product (including unreacted and completely remaining urea, fly ash) is a compound fertilizer containing phosphorus, potassium, calcium, silicon and other trace elements, which can be used in agricultural production to increase crop yields and has The role of pest control, does not pollute the environment.
由于采用催化剂，使得尿素在低于它的熔点下即能和二氧化硫反应生成硫酸铵，避免高温下尿素分解损失，又能在锅炉烟气温度条件下(一般为130℃左右)进行脱除反应，避免另设加温装置，使二氧化硫脱除装置简单，又能减少脱除能耗，降低运行费用。Due to the use of catalysts, urea can react with sulfur dioxide below its melting point to form ammonium sulfate, avoiding the loss of urea decomposition at high temperatures, and can also perform removal reactions at boiler flue gas temperature conditions (generally around 130°C). Avoid setting up another heating device, so that the sulfur dioxide removal device is simple, and can reduce the removal energy consumption and reduce operating costs.
本发明具有占地少、投资较少、运行费用不高、无二次污染等优点，且二氧化硫的脱除率可达97％以上。脱除产物硫酸铵、未作用完全剩余的尿素、以及沉积下来的粉煤灰是一种高含氮、含多种元素的复合肥料，可用于农业生产，从而解决了产生二次污染的问题，扣除可用作肥料的部分收入后，本发明每吨二氧化硫脱除费用低于700元。The invention has the advantages of less land occupation, less investment, low operating cost, no secondary pollution, etc., and the removal rate of sulfur dioxide can reach more than 97%. The ammonium sulfate removal product, the remaining urea that has not been fully used, and the deposited fly ash are a compound fertilizer with high nitrogen content and multiple elements, which can be used in agricultural production, thereby solving the problem of secondary pollution. After deducting part of the income that can be used as fertilizer, the cost of removing sulfur dioxide per ton of the present invention is less than 700 yuan.
综上所述，本发明既是一种新型的、先进的污染防治技术，也是一种资源综合利用技术。不仅具有明显的环境效益，也具有明显的经济效益和社会效益。本发明可用于锅炉烟气脱硫，也可用于脱除其它工业尾气中的二氧化硫。In summary, the present invention is not only a novel and advanced pollution prevention technology, but also a resource comprehensive utilization technology. It not only has obvious environmental benefits, but also has obvious economic and social benefits. The invention can be used for boiler flue gas desulfurization, and can also be used for removing sulfur dioxide in other industrial tail gases.
具体实施方式Detailed ways
下面给出本发明的实施例。Examples of the present invention are given below.
实施例1：将1000千克尿素和100千克氢氧化铝粉末混合均匀后(即尿素与催化剂重量比为100∶10)，放入烟气通道内，烟气的温度控制在100～130℃之间(燃煤锅炉的烟气一般在此范围内)烟气通过尿素时，烟气中的二氧化硫与尿素反应生成硫酸铵。经检测二氧化硫的脱除率为99.5％。Example 1: After mixing 1000 kg of urea and 100 kg of aluminum hydroxide powder evenly (that is, the weight ratio of urea to catalyst is 100:10), put them into the flue gas channel, and control the temperature of the flue gas between 100 and 130°C (The flue gas of coal-fired boilers is generally within this range) When the flue gas passes through urea, the sulfur dioxide in the flue gas reacts with urea to form ammonium sulfate. The removal rate of sulfur dioxide is 99.5%.
实施例2：将1000千克尿素和50千克氢氧化铝粉末混合均匀后(即尿素与催化剂的重量比为100∶5)，放入烟气通道内，其余过程同实施例1，经检测二氧化硫的脱除率为99.3％。Embodiment 2: after 1000 kilograms of urea and 50 kilograms of aluminum hydroxide powders are mixed evenly (that is, the weight ratio of urea and catalyst is 100: 5), put into flue gas channel, all the other processes are the same as embodiment 1, after detecting the concentration of sulfur dioxide The removal rate was 99.3%.
实施例3：将500千克尿素和7.5千克氢氧化铝粉末混合均匀后(即尿素与催化剂的重量比为100∶1.5)，放入烟气通道内，其余过程同实施例1，经检测二氧化硫的脱除率为99.1％。Embodiment 3: After 500 kilograms of urea and 7.5 kilograms of aluminum hydroxide powders are mixed evenly (that is, the weight ratio of urea and catalyst is 100: 1.5), put in the flue gas passage, all the other processes are the same as embodiment 1, after detecting the concentration of sulfur dioxide The removal rate was 99.1%.
经上述处理后所得的固体混合物可用作农用复合肥料，在处理上述烟气之前最好先进行除尘(实际上许多锅炉烟气排放前均作过除尘处理)。The solid mixture obtained after the above treatment can be used as an agricultural compound fertilizer. It is better to remove dust before treating the above-mentioned flue gas (in fact, many boiler flue gases have been dust-removed before being discharged).
Claims (1)
- A kind of method that removes sulfur dioxide in flue gas is a catalyst with aluminium hydroxide, under 100～130 ℃, makes flue gas pass through urea, and in the presence of aluminium hydroxide, sulfur in smoke and urea reaction generate ammonium sulfate and remove from flue gas; The weight ratio of urea and aluminium hydroxide input is 100: 1.5～10.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01106635 CN1120033C (en) | 2001-04-18 | 2001-04-18 | Method for removing sulfur dioxide from flue gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01106635 CN1120033C (en) | 2001-04-18 | 2001-04-18 | Method for removing sulfur dioxide from flue gas |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1321537A CN1321537A (en) | 2001-11-14 |
| CN1120033C true CN1120033C (en) | 2003-09-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 01106635 Expired - Fee Related CN1120033C (en) | 2001-04-18 | 2001-04-18 | Method for removing sulfur dioxide from flue gas |
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| Country | Link |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100344378C (en) * | 2005-11-30 | 2007-10-24 | 曹志德 | Desulfur denitrogen catalyst of fuel coal, fuel oil boiler smoke and its desulfur denitrogen method |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104722165B (en) * | 2015-03-03 | 2016-02-24 | 内蒙古阜丰生物科技有限公司 | A kind of environment-protective process purifying amino acids production tail gas |
| CN104923048A (en) * | 2015-07-01 | 2015-09-23 | 碧水蓝天环保集团有限公司 | Method for removing coal-fired flue gas pollutants and system for removing coal-fired flue gas pollutants |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN100344378C (en) * | 2005-11-30 | 2007-10-24 | 曹志德 | Desulfur denitrogen catalyst of fuel coal, fuel oil boiler smoke and its desulfur denitrogen method |
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| CN1321537A (en) | 2001-11-14 |
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