Method for removing harmful gases in boiler exhaust gas

A boiler flue gas and harmful gas technology, which is applied in the field of flue gas treatment, can solve problems such as high requirements for reaction parameters, complicated operation steps, and easy corrosion of equipment, and achieve the effects of simple and low-cost preparation, simple operation process, and low cost

Active Publication Date: 2015-03-04
内蒙古阜丰生物科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage is that the investment in process equipment is large, the flue gas needs to be preheated, and the equipment is easy to corrode, etc.
Dry flue gas desulfurization and denitrification integration technology includes four aspects: solid-phase absorption / regeneration method, gas / solid catalytic simultaneous desulfurization and denitrification technology, absorbent injection method and high-energy electron activation oxidation method; this method has higher requirements on reaction parameters, The operation steps are complicated and difficult to be mastered by general production enterprises

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] A method for removing harmful gases in boiler flue gas, the process comprises the steps of:

[0034] 1) Preparation of chemical preparations:

[0035] Get 5 parts of limestone, 4 parts of wheat bran, 3 parts of potassium humate, 2 parts of bentonite, 1 part of peat soil, and 15 parts of ammonia water according to parts by weight; use limestone, wheat bran, potassium humate, bentonite, and peat ash, Mix evenly, grind into a powder with a particle size of 100 mesh, then add ammonia water, and centrifuge at 100 rpm for 30 minutes to obtain the product;

[0036] 2) Preparation of biological agents:

[0037] According to volume percentage, mix and stir 40% of Nitrosoma, 20% of Paracoccus denitrificans, 20% of Bacillus cereus, and 20% of Alcaligenes faecalis; 8 a / ml;

[0038] Described nitrosative bacteria are nitrosative bacteria ( Nitrosomonas europaea ) CCTCC No: M 2010002 (see CN101955885 for example); the paracoccus denitrificans is Paracoccus denitrificans ATCC13543...

Embodiment 2

[0046] A method for removing harmful gases in boiler flue gas, the process comprises the steps of:

[0047] 1) Preparation of chemical preparations:

[0048] Get 8 parts of limestone, 6 parts of wheat bran, 5 parts of potassium humate, 3 parts of bentonite, 2 parts of peat soil, 20 parts of ammonia water in parts by weight, and set aside; limestone, wheat bran, potassium humate, bentonite, and peat ash, Mix evenly, grind into a powder with a particle size of 200 mesh, then add ammonia water, and centrifuge at 100 rpm for 30 minutes to obtain the product;

[0049] 2) Preparation of biological agents:

[0050] According to volume percentage, mix and stir 40% of Nitrosoma, 20% of Paracoccus denitrificans, 20% of Bacillus cereus, and 20% of Alcaligenes faecalis; 8 a / ml;

[0051] 3) Desulfurization and denitrification:

[0052] The boiler flue gas is firstly treated with chemical preparations for 20 minutes, then the flue gas is cooled to a temperature below 35°C, and finally e...

Embodiment 3

[0057] Removal effect test of harmful gases in boiler flue gas: choose the boiler flue gas of our company, and use the technical process of Example 1 to treat it. The specific results are shown in Table 1:

[0058] Table 1

[0059] Hazardous gas type NOx (mg / Nm 3 ) SO 2 (mg / Nm 3 ) Soot (mg / Nm 3 ) before processing 576 1417 129 after treatment 24 59 8

[0060] Conclusion: After treatment with chemical agents and biological agents, the concentration of nitrogen and sulfur oxides is greatly reduced, fully complying with the emission standards.

[0061]

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PUM

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Abstract

The invention belongs to the field of exhaust gas treatment and discloses a method for removing harmful gases in boiler exhaust gas. The method comprises the steps of 1) preparing a chemical agent, 2) preparing a biological agent, 3) desulfurizing and denitrifying, and 4) preparing a bacterial fertilizer. The method for removing harmful gases in boiler exhaust gas is simple and feasible, the cost of raw materials is low, nitrogen and sulfur oxides can be effectively removed, and the fertilizer is prepared from wastes, and therefore, waste materials are changed into things of value and the industrial value added is increased.

Description

technical field [0001] The invention belongs to the field of flue gas treatment, and in particular relates to a method for removing harmful gas in boiler flue gas. [0002] Background technique [0003] Boiler flue gas is a mixture of gas and smoke, which is the main cause of air pollution in residential areas. The composition of the flue gas is very complex. The gas includes water vapor, sulfur dioxide, hydrocarbons, and nitrogen oxides. The smoke includes fuel ash, coal particles, oil droplets, and high-temperature cracking products. Therefore, the pollution of flue gas to the environment is the compound pollution of various poisons. The harmfulness of smoke to the human body is related to the size of the particles. The most harmful to the human body is the floating dust with a diameter of less than 10 microns, especially the 1-2.5 micron floating dust is the most harmful. [0004] The integrated technology of desulfurization and denitrification widely used at home and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G3/00B01D53/60B01D53/84
CPCB01D53/60B01D53/84B01D2251/95B01D2257/302B01D2257/402B01D2257/404B01D2258/0283C05B7/00C05C1/00C05C3/00C05C5/04C05D1/02C05D3/00C05F5/002C05F11/02C05F11/08Y02A50/20Y02C20/10
Inventor 丁兆堂卢松宋玉丽徐彩凤邵风慧李晓永朱心双
Owner 内蒙古阜丰生物科技有限公司
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