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Dust removing device and flue gas dust removing method

A dust removal device, flue gas technology, applied in separation methods, chemical instruments and methods, electrostatic effect separation, etc., to achieve the effects of controlling corrosion, avoiding reduction, and avoiding service life

Inactive Publication Date: 2016-12-07
CHINA HUADIAN ENG +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is how to effectively reduce the formation of acid mist, reduce the adhesion of acid mist and dust, reduce the corrosion and pollution of equipment by acid mist, reduce the discharge of pollutants, and ensure the service life of equipment

Method used

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  • Dust removing device and flue gas dust removing method
  • Dust removing device and flue gas dust removing method
  • Dust removing device and flue gas dust removing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Such as figure 1 As shown, the present invention provides a dust removal device 100, including an electric precipitator 101, a cooler 102 connected to the inlet section 1011 of the electric precipitator, an alkaline absorbent injection system 103, and the alkaline absorbent injection The injection ports of the system 103 are arranged on the cooler inlet section 1021 . The alkaline absorbent fully absorbs SO3 in the flue gas entering the cooler 102, and when the flue gas is cooled, it prevents the formation of excessive acid mist, thereby reducing the adhesion of acid mist and dust, and avoiding equipment blockage. Furthermore, in order to more fully absorb the acid mist and prevent the acid mist from corroding the equipment in the dust collector, the injection port of the alkaline absorbent injection system 103 can also be arranged on the inlet section 1011 of the electrostatic precipitator. In order to ensure the reliability of the supply of alkaline absorbents and en...

Embodiment 2

[0048] Such as figure 1 As shown, the dust removal device of the present invention includes an electric precipitator 101, a cooler 102 connected to the inlet section 1011 of the electric precipitator, and an alkaline absorbent injection system 103, and the injection port of the alkaline absorbent injection system 103 is set On the inlet section 1021 of the cooler, in this embodiment of the present invention, calcium hydroxide powder is used as the alkaline absorbent, and the cooler 102 is an air preheater or a dust collector smoke cooler, and the dust collector The air precipitator is arranged at the front end of the electrostatic precipitator, and the air preheater is arranged at the front end of the electrostatic precipitator. The air preheater performs heat exchange on the flue gas, which reduces energy consumption, and the strong oxidation Calcium is injected in front of the air preheater or in front of the smoke cooler of the precipitator to reduce SO3 to below 5PPM, and ...

Embodiment 3

[0052] Such as figure 1 As shown, the dust removal device in the embodiment of the present invention includes an electric precipitator 101, a cooler 102 connected to the inlet port 1011 of the electric precipitator, an alkaline absorbent injection system 103, and the alkaline absorbent injection system 103 The injection port is arranged on the inlet section of the cooler 102, such as Figure 6 As shown, the dedusting device 300 in the embodiment of the present invention also includes a destocking reactor (SCR) 305, and the cooler 102 in the embodiment of the present invention is Figure 6 The air preheater 302 in the air preheater 302, the alkaline absorbent can be injected into the SCR reactor outlet section 3052 before the air preheater 302 after the SCR reactor 305, and can also be set on the air preheater before the dust collector 301 after the air preheater 302 On the outlet section 3021 of the SCR reactor, in order to reduce the SO3 content entering the SCR reactor 305,...

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Abstract

The invention relates to a dust removing device which comprises an electric precipitator, a cooler and an alkalinity absorbent injection system, wherein the cooler and the alkalinity absorbent injection system are connected with an inlet section of the electric precipitator. An injection nozzle of the alkalinity absorbent injection system is formed in an inlet section of the cooler. The invention further relates to a flue gas dust removing method. The flue gas dust removing method comprises the steps of injecting an alkalinity absorbent to flue gas, cooling the flue gas and removing dust of the cooled flue gas. By adoption of the technical scheme of the embodiment of the invention, the SO3 content in the flue gas is effectively decreased, acid mist generated by the cooled flue gas is reduced, and the situation that blocking objects are formed by attaching of the acid mist and dust, and consequently failure of subsequent equipment such as dust removing equipment is caused is reduced. Further, the acid content in the flue gas is decreased, and the corrosion effect of acid on the equipment is effectively controlled accordingly.

Description

technical field [0001] The invention relates to the field of coal power pollutant control, in particular to a dust removal device and a flue gas dust removal method. Background technique [0002] Electrostatic precipitator technology is based on mature and reliable electrostatic precipitator, which can jointly remove multiple pollutants, and it is increasingly adopted by coal-fired power plants. The types of coal used by coal-fired power plants in the market are changeable, the situation is complicated, and the sulfur content is not the same. During the implementation process, the sulfur in the high-sulfur coal often forms acid after burning, causing corrosion damage to the equipment. Then the pipes are blocked, making the production unsafe and reliable; on the other hand, due to the use of electrostatic precipitator technology, it is necessary to effectively control energy consumption. Therefore, there is a need for a dust removal technology that can effectively remove dus...

Claims

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Application Information

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IPC IPC(8): B03C3/013B01D53/78B01D53/50
Inventor 汪洋付丽辉耿宣
Owner CHINA HUADIAN ENG
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