Chemical agglomeration promoter

A technology of chemical agglomeration and accelerator, applied in the fields of energy and environment, can solve the problems of limited agglomeration efficiency of the agglomeration accelerator, unsuitable for large-scale industrial production, complex composition of the agglomeration agent formula, etc. Inexpensive effect

Active Publication Date: 2016-07-20
武汉天空蓝环保科技有限公司
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AI Technical Summary

Problems solved by technology

Chinese patent CN101513583B discloses "a coal-fired ultrafine particle chemical agglomeration flocculant". The agglomeration flocculant can promote the agglomeration of fine particles in front of the electrostatic precipitator to large particles within a certain range, but the agglomeration efficiency of the agglomeration accelerator is still relatively limited , is about 30%, and the formula contains acidic substances such as phosphoric acid, which will cause a certain degree of corrosion to the flue equipment.
[0005] In addition, Chinese patent CN104474830A discloses "a chemical agglomeration accelerator for removing coal-fired fine particles and its use method". Although the chemical agglomeration accelerator does not contain acidic substances, it overcomes the problem of corrosion damage to flue equipment. However, the agglomeration efficiency of the agglomeration accelerator is still relatively limited, less than 60%.

Method used

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  • Chemical agglomeration promoter

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] This example provides a chemical agglomeration accelerator, the formula ratio of which is polyethyleneimine: 0.001%, Tween 80: 0.001%, and the remaining amount is water; a coal-fired fly ash of a power plant is used as the experimental object, and the fly ash particles diameter of 20 μm, the chemical agglomeration promoter of this example is atomized into droplets with an average particle diameter of about 30 μm under the action of external air and sprayed into the agglomeration chamber. The two interact in the simulated flue environment in the agglomeration chamber. For about 10 seconds, the agglomeration accelerator promotes the agglomeration and growth of fly ash fine particles, which are then captured by the subsequent bag filter. The cloth bag adopts conventional chemical fiber filter material, and an isokinetic sampler is used to sample at the rear outlet of the bag dust removal device to measure the emission concentration of fly ash particles. The results show th...

Embodiment 2

[0027] This embodiment provides a chemical agglomeration accelerator, the formula ratio of which is polyethyleneimine: 0.01%, Tween 80: 0.1%, and the remaining amount is water; a coal-fired fly ash of a power plant is used as the experimental object, and the fly ash particles diameter of 20 μm, the chemical agglomeration accelerator of this example was subjected to an agglomeration experiment in the manner of Example 1, and the emission concentration of fly ash particles was measured. The results show that after spraying the agglomeration accelerator described in the formula of this embodiment, the fly ash particles produced obvious agglomeration, and the concentration of fly ash particles after the dust removal device was 280.6 mg m when the agglomeration accelerator was not sprayed. -3 down to 107.8mg·m -3 , the agglomeration efficiency was 61.6%.

Embodiment 3

[0029] In this example, the electric field fly ash of a power plant electrostatic precipitator is mixed with preheated air as simulated flue gas to enter the agglomeration chamber. The mass percentage of the formula is polyethyleneimine: 0.001%, Tween 80: 0.001%, and potassium chloride: 0.1%. The agglomeration accelerator is atomized into droplets with an average particle size of about 30 μm and sprayed into the agglomeration chamber under the action of external air. The two interact in the simulated flue environment in the agglomeration chamber. The particles agglomerate and grow, and then are captured by the subsequent bag filter. The cloth bag adopts conventional chemical fiber filter material, and isokinetic sampling is carried out at the outlet of the rear part of the bag dust removal device by an isokinetic sampler to measure the particle emission concentration. The results show that after spraying the chemical agglomeration accelerator described in the formula of this e...

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Abstract

The invention provides a chemical agglomeration promoter.The chemical agglomeration promoter is prepared from, by mass, 0.001%-0.01% of polyethyleneimine, 0.001%-0.1% of tween-80 and the balance water.The chemical agglomeration promoter is wide in raw material source, low in price, environmentally friendly, simple in chemical composition, simple and fast in synthesis process and free of harm to the environment; the agglomeration effect on fine particulate matter is significant, and the fine particulate matter emission of a coal-fired power plant can be reduced by 60% or above; besides, the chemical agglomeration promoter does not contain acid matter, and thus corrosion to flue equipment can be avoided; moreover, as most toxic heavy metals are gathered on fine particulate matter, heavy metals can be integrally removed with the chemical agglomeration promoter.

Description

technical field [0001] The invention belongs to the technical field of energy and environment, and in particular relates to a chemical agglomeration accelerator for removing coal-fired fly ash fine particles. Background technique [0002] my country is currently the world's largest coal producer and consumer, and coal-burning fly ash particles are one of the main sources of air pollutants in my country. Fine particulate matter (particles with an aerodynamic diameter of less than 2.5 μm, usually referred to as PM 2.5 Indicates) is an important air pollutant, easy to absorb heavy metals, organic matter, viruses and bacteria, etc., can enter the human body through the respiratory tract, and even affect the blood circulation system, which has attracted the attention of countries all over the world. PM 2.5 One of the main sources of fossil fuel combustion flue gas emissions, including civil and commercial small and medium-sized boilers, thermal power plants, etc. The "Emission...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D51/02B03D3/06
CPCB01D51/02B03D3/06
Inventor 张军营李志慧李湧
Owner 武汉天空蓝环保科技有限公司
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