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Multi-stage internal circulation semi-dry desulfurization, denitrification and mercury removal integrated device

A technology of semi-dry desulfurization and internal circulation, which is applied in the field of flue gas purification, can solve the problems of large power consumption and difficult implementation of ozone generating devices, large resistance of cyclone separators, and high operating costs, and achieves improved treatment effect, simple structure, and reduced cost. The effect of running costs

Active Publication Date: 2017-05-24
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This device can effectively desulfurize, denitrify and demercurate, but its disadvantages are complex structure, high resistance of the cyclone separator, and huge power consumption of the ozone generator, which is difficult to implement (for example, the amount of flue gas produced by a 20t / h boiler needs to be equipped with an ozone generator with a power of 110KW devices, huge power consumption, poor economy), large floor area, high construction costs, and high operating costs

Method used

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  • Multi-stage internal circulation semi-dry desulfurization, denitrification and mercury removal integrated device
  • Multi-stage internal circulation semi-dry desulfurization, denitrification and mercury removal integrated device
  • Multi-stage internal circulation semi-dry desulfurization, denitrification and mercury removal integrated device

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specific Embodiment approach 1

[0029] Specific implementation mode one: as Figure 1~Figure 8 As shown, the multi-stage internal circulation semi-dry desulfurization, denitrification and mercury removal integrated device includes flue gas inlet 1, small venturi tube 2, multi-stage internal circulation reactor 3, flue gas outlet 4, and multiple double lye atomizers Nozzle 5, ash hopper 6, ClO 2 Distributor 7, slurry pump 8, container filled with double lye 9, multiple U-shaped tank separators 10, bag filter 11, induced draft fan 12, ash storage tank 13, screw feeder 14, feeding pipe 15 and ash bins 16;

[0030]The multi-stage internal circulation reactor 3 is vertically arranged, and the multi-stage internal circulation reactor 3 is sequentially from the first-stage internal circulation reactor to the Nth-stage internal circulation reactor from bottom to top, N is a natural number, and N= 3~5; the lower part of the first-stage internal circulation reactor is a large venturi tube 17, and the large venturi t...

specific Embodiment approach 2

[0034] Specific implementation mode two: as figure 1 , figure 2 , Figure 4 , Figure 6~Figure 8 As shown, the specific embodiment one is the multi-stage internal circulation semi-dry desulfurization, denitrification and mercury removal integrated device, each of the U-shaped groove separators 10 includes a multi-layer U-shaped groove, and the side of the conical shell 20 Several ventilation holes 21 are processed on the wall, and the large-diameter end of the conical shell 20 is provided with an annular outer edge 22. The outside of the conical shell 20 is provided with multi-layer U-shaped grooves from the inside to the outside, and the inner U-shaped groove The lower end of the ring-shaped outer edge 22 is fixedly connected to the upper surface of the ring-shaped outer edge 22, and openings are processed on the ring-shaped outer edge 22 corresponding to the U-shaped groove in the inner layer. The upper end of the U-shaped groove is fixedly connected, and each layer of U...

specific Embodiment approach 3

[0036] Specific implementation mode three: as figure 1 As shown, the multi-stage internal circulation semi-dry integrated desulfurization, denitrification and mercury removal device described in Embodiment 1 or Two, the multi-stage internal circulation semi-dry integrated desulfurization, denitrification and mercury removal device also includes at least one horizontal guide plate 24 The at least one horizontal guide plate 24 is arranged inside the smoke inlet 1 parallel to the center line of the smoke inlet 1, and all the horizontal guide plates 24 are fixedly connected to the inner wall of the smoke inlet 1 (the purpose of setting the horizontal guide plate 24 is : used for evenly distributing the flue gas, after the flue gas passes through the horizontal guide plate 24, it is transported to the large venturi tube 17, and part of the solid particles fall into the ash hopper 6 under the action of gravity and centrifugal inertial force, and pass through the ash hopper 6's ash o...

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Abstract

The invention provides a multistage internal circulation semi-dry method desulfurization, denitrification and demercuration integrated device and belongs to the field of smoke purification. The integrated device can remove sulfur, nitrate and mercury in smoke in a combined mode. A large Venturi tube is arranged at the lower portion of a first-stage internal circulation reactor, a small Venturi tube is arranged in the large Venturi tube, the large Venturi tube is communicated with an ash bucket, the ash bucket is communicated with a smoke inlet, and a ClO2 distributor is installed in the smoke inlet. A dual-alkali liquid atomizing nozzle is arranged in each stage of internal circulation reactor, each dual-alkali liquid atomizing nozzle is communicated with a container containing dual-alkali liquid through a slurry pump, a U-shaped groove separator is fixed to the top of each stage of internal circulation reactor, the Nth-stage internal circulation reactor is communicated with a smoke outlet, the smoke outlet is communicated with a bag-type dust remover, the bag-type dust remover is communicated with an induced draft fan, the bag-type dust remover is communicated with an ash storage tank and an ash bin through an ash discharge pipeline, a spiral feeder is arranged in the lower port of the ash storage tank, and an ash discharge port of the spiral feeder is communicated with the small Venturi tube through a discharge pipe. The integrated device is used for removing sulfur, nitrate and mercury in smoke.

Description

technical field [0001] The invention relates to a multi-stage internal circulation semi-dry desulfurization, denitrification and mercury removal device. The invention belongs to the field of flue gas purification. Background technique [0002] Coal is the main energy source in my country, and the S0 produced by coal combustion 2 , N0 x And heavy metal pollutants such as Hg seriously pollute the atmosphere. Among them, S0 2 , NOx is the main source of pollution such as acid rain and photochemical smog. Hg is highly toxic and easy to deposit in organisms with strong hysteresis, which seriously damages human health. Therefore, it is necessary to control S0 in flue gas from the source. 2 , NOx and Hg emissions are imminent. [0003] There are many flue gas treatment technologies, among which the more mature and representative desulfurization technologies include wet method, semi-dry method and dry method, etc., low-temperature denitrification technologies include catalytic r...

Claims

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Application Information

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IPC IPC(8): B01D53/80B01D53/60B01D53/64B01D46/02
Inventor 别如山张芸宋兴飞纪晓瑜陈佩房点李鹏坤顾文波
Owner HARBIN INST OF TECH
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