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Desulphurization and denitration agent based on waste biomass and preparation method thereof

A biomass and desulfurizer technology, applied in separation methods, chemical instruments and methods, physical/chemical process catalysts, etc., can solve problems such as high processing costs, ammonia leakage, and waste materials not being effectively used, so as to reduce pollution and The effect of emissions

Active Publication Date: 2014-01-08
北京绿洁美科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Pulse corona method, electron beam irradiation method and dry catalytic method are typical representatives of dry desulfurization and denitrification. Although dry method has the advantages of no secondary pollution, it also has high treatment cost, large investment and ammonia leakage. etc.
[0005] The more mature research in wet technology is calcium-based absorbent catalytic oxidation method, which is a technology developed on the basis of calcium-added wet desulfurization technology. Although it has the advantages of simple process, the by-product calcium sulfate There is no way to avoid the defects of secondary pollutants such as secondary pollutants and flue gas that need to be cooled.
[0006] Biological method is the use of microorganisms to treat SO in flue gas 2 with NO X Although the research shows that this method has the advantages of low investment and operating costs, but this method also requires the cooling of the flue gas. In addition, this method is still in the research stage
[0007] On the other hand, my country is a country rich in biomass resources, which also produces a large amount of biomass waste including crop straw, crop processing waste, forestry processing waste or municipal solid waste, most of which are are not being used effectively

Method used

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  • Desulphurization and denitration agent based on waste biomass and preparation method thereof
  • Desulphurization and denitration agent based on waste biomass and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] Preparation of desulfurization and denitrification agent with Cu-loaded molecular sieve, activated carbon, straw and biomass binder as raw materials and its effect on flue gas treatment

[0048] The preparation steps of the desulfurization and denitrification agent of this embodiment:

[0049] The first step is the preparation of raw materials.

[0050] (1) To prepare a biomass binder, soak straws with an average size of ≤3 mm in water for 2 days, add slaked lime accounting for 33% of the mass of the straws to the water, stir evenly to obtain a mixture, and then heat the mixture to 95-100°C , heat preservation for 4 hours, the obtained yellow viscous substance is the biomass binder; the quality of water is 8 to 10 times the weight of the straw.

[0051] In addition, the straw that has been dried to a moisture content of less than 10% is crushed to a size below 3 mm with a plant grinder.

[0052] (2) Preparation of powdery zeolite catalysts loaded with metal copper oxi...

Embodiment 2

[0066] Preparation of Fe-loaded molecular sieve, activated carbon, chaff (crop waste) and biomass binder as raw materials for desulfurization and denitrification agent and its effect on flue gas treatment

[0067] The preparation steps of the desulfurization and denitrification agent of this embodiment:

[0068] The first step is the preparation of raw materials.

[0069] (1) Prepare biomass binder with straw as raw material. The preparation process of the biomass binder is as follows: first, soak the straw crushed to a size of less than 3mm in a water pool for 3 days, and the water in the soaking pool is 8 times the weight of the straw; then, add the straw mass into the soaking pool 30% slaked lime; finally, use steam to heat the mixture in the immersion tank to above 95°C and keep it warm for 4 hours to obtain a yellow viscous biomass binder.

[0070] (2) Prepare powdered chaff. The chaff is crushed to below 3mm for subsequent use.

[0071] (3) Prepare a powdery zeolite ...

Embodiment 3

[0082] Preparation of Co-loaded molecular sieve, activated carbon, sawdust (forestry processing waste) and biomass binder as raw materials for desulfurization and denitrification agent and its effect on flue gas treatment

[0083] The preparation steps of the desulfurization and denitrification agent of this embodiment:

[0084] The first step is the preparation of raw materials.

[0085] (1) Using straw as raw material to prepare biomass binder, the preparation steps are the same as in Example 2.

[0086] (2) Crush the sawdust to below 3mm for later use.

[0087] (3) Preparation of a powdery zeolite catalyst loaded with cobalt oxide. First, prepare a concentration of 30% Co(NO 3 ) 2 , then crushed to 20-40 mesh HZSM-5 molecular sieves and soaked in the solution, the obtained powder was filtered and dried at 100°C for 2 hours, then calcined at 500°C for 4 hours, and finally weighed and calculated the weight gain of the powder, when the metal in the molecular sieve When th...

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Abstract

The invention discloses a desulphurization and denitration agent based on waste biomass and a preparation method thereof. The desulphurization and denitration agent contains zeolite catalysts loaded with metal oxides, modified active carbon, waste biomass and a biomass binder. The preparation method of the desulphurization and denitration agent based on the waste biomass comprises the following main steps: firstly, crushing the solid-state biomass waste, the zeolite catalysts and the active carbon to obtain powder; then, uniformly mixing the crushed materials in the biomass binder; and finally, drying and forming the mixed materials to obtain the desulphurization and denitration agent disclosed by the invention. The desulphurization and denitration agent disclosed by the invention not only can be directly used for purifying a high-temperature flue gas of over 600 DEG C, but also can be used for effectively realizing treatment of wastes with processes of wastes against one another, i.e., the biomass waste including crop straws, crop processing waste, timber processing waste or municipal domestic waste, and the like are effectively used to govern flue gas pollution.

Description

technical field [0001] The invention relates to a desulfurization and denitrification agent based on biomass waste and a preparation method thereof; it can directly purify high-temperature flue gas above 600°C, especially containing low-concentration SO 2 with NO X The invention relates to a flue gas denitrification and desulfurization agent and a preparation method thereof; it belongs to the flue gas desulfurization and denitrification technology basin. Background technique [0002] Low-concentration SO produced in fields such as metallurgy, thermal power generation and chemical industry 2 with NO X The flue gas has caused serious pollution to the environment, and it is imperative to implement desulfurization and denitrification of the flue gas. At present, more mature methods generally use multi-system separate removal technology (the so-called separate removal refers to denitrification and desulfurization step by step), this technology can achieve a higher removal rate...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/46B01D53/86B01D53/60
Inventor 张志敏周向清
Owner 北京绿洁美科技有限公司
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