CN203540255U

CN203540255U - Fume gas desulfurization defogging device in coal-fired power plant

Info

Publication number: CN203540255U
Application number: CN201320450555.7U
Authority: CN
Inventors: 郭天祥; 杜亚荣
Original assignee: North China Electric Power University
Current assignee: North China Electric Power University
Priority date: 2013-07-26
Filing date: 2013-07-26
Publication date: 2014-04-16
Anticipated expiration: 2023-07-26

Abstract

The utility model discloses a flue gas desulfurization and demisting device in a coal-fired power plant. Wire mesh demister, the second-stage demister is a Λ-type plate demister composed of multiple Λ-type plate demister modules, each Λ-type wire mesh demister module is composed of two inline wire The net demister module is fixed by the intermediate member; each module of each stage demister can be drawn and erected on the guide rail, and the guide rail is fixed on the horizontal support beam; between the first stage demister and the second stage The lower end and the upper end of the demister are respectively provided with the first layer, the second layer, the third layer and the fourth layer of cleaning devices. The utility model can reduce the critical separation particle size of the slurry droplet to below 5 μm, and at the same time, can effectively remove PM ₁₀ and part of PM _2.5 in the flue gas, thereby reducing the amount of slurry in the net flue gas and the desulfurization system of the coal-fired power plant. Effectively prevent GGH blockage.

Description

A kind of coal fired power plant flue gas desulfurization demister

Technical field

The utility model belongs to gas cleaning process field, relates to a kind of flue-gas purification equipment, relates in particular to a kind of coal fired power plant flue gas desulfurization demister.

Background technology

At present in coal-fired flue-gas, sulfur dioxide is administered conventionally to adopt and after deduster, is installed wet desulfurization system additional and carry out, and most of desulphurization system, in order to improve flue gas diffusion height, is all provided with flue gas heat-exchange unit GGH.GGH often blocks in application process, and Frequent Troubles has a strong impact on the even normal operation of unit of desulphurization system.The clean fume side cigarette of GGH gas carrying liquid slurry is the one of the main reasons that causes GGH to block.Existing desulphurization system is general adopts 2 grades of board-like demisters to remove the slurry drops in flue gas, prevention GGH blocks, demister adopts template more, at right angle setting mode, plate distance is at 20-40mm, overall separation particle diameter is larger, and to the critical separation particles of the slurry drops in flue gas, in 25 μ m left and right, to 25 μ m, especially the slurry drops separating power below 15 μ m is poor below.

Summary of the invention

The purpose of this utility model solves the above-mentioned problems in the prior art exactly, a kind of coal fired power plant flue gas desulfurization demister is provided, this system can make the critical separation particles of slurry drops be reduced to below 15 μ m, simultaneously the effective PM in cooperation-removal flue gas ₁₀remove PM with part _2.5thereby, reduce the clean flue gas band slurry of Desulphurization for Coal-fired Power Plant system and effectively prevent GGH to block.

For completing above-mentioned purpose, technical solution of the present utility model is: a kind of coal fired power plant flue gas desulfurization demister, and it is vertically mounted on the top of desulfuration absorbing tower, and it comprises the cleaning device of two-stage demister and 4 layers of demister; First order demister is from top to bottom the board-like demister being comprised of multiple board-like demister modules or the mesh mist eliminator being comprised of multiple mesh mist eliminator modules, second level demister is the Λ type mesh mist eliminator being comprised of multiple Λ type mesh mist eliminator modules, and each Λ type mesh mist eliminator module is fixedly formed by intermediate member by two yi word pattern mesh mist eliminator modules; The mesh of the mesh mist eliminator module of the first order is greater than the mesh of second level yi word pattern mesh mist eliminator module; Each module of every grade of demister can be erected on guide rail respectively pull, and guide rail is fixed on horizontal support beam, and horizontal support beam is fixed in the top inner wall of desulfuration absorbing tower; The sidepiece of desulfuration absorbing tower has the access hole of first order demister and second level demister; In the lower end of first order demister and upper end, be respectively arranged with just ground floor and the second layer cleaning device of the lower end to first order demister and upper end of nozzle, in the lower end of second level demister and upper end, be respectively arranged with just the 3rd layer and the 4th layer of cleaning device of the lower end to second level demister and upper end of nozzle; Ground floor, the second layer, the 3rd layer and the 4th layer of cleaning device are comprised of multiple nozzles and pipeline respectively, and multiple nozzles are evenly fixed on pipeline, and pipeline is fixed on bracing frame, and bracing frame is fixed on brace summer; The cleaning medium of ground floor, the second layer and the 3rd layer of cleaning device is that the cleaning medium of the 4th layer of cleaning device is air or steam through the fresh water (FW) of softening and film processing; Ground floor, the second layer, the 3rd layer cross with the device for cleaning pipeline of the 4th layer of cleaning device the input channel that the pipe outlet arranging on desulfuration absorbing tower wall is connected cleaning medium.

The utility model has been introduced mesh mist eliminator, it can separate the slurry drops of the following critical separation particles of 5 μ m, it can effectively reduce the clean flue gas band of Desulphurization for Coal-fired Power Plant system slurry amount and effectively prevent flue gas heat-exchange unit GGH to block, and under coal-fired flue-gas condition, 5 μ m and above slurry drops in flue gas is removed completely; The simultaneously effective PM in cooperation-removal flue gas ₁₀remove PM with part _2.5.The utility model is easy to maintenance, and expense is low, stable, easy to utilize, is not only suitable for large-sized boiler, and is applicable to medium or mini type boiler and other coal combustion equipment smoke processing system.

Accompanying drawing explanation

Fig. 1 is top view of the present utility model;

Fig. 2 is the AA cutaway view of the first embodiment of Fig. 1;

Fig. 3 is the AA cutaway view of the second embodiment of Fig. 1;

Fig. 4 is the AA cutaway view of the third embodiment of Fig. 1;

Fig. 5 is the AA cutaway view of the 4th kind of embodiment of Fig. 1;

Fig. 6 is the AA cutaway view of the 5th kind of embodiment of Fig. 1;

Fig. 7 is the AA cutaway view of the 6th kind of embodiment of Fig. 1.

The specific embodiment

Below in conjunction with the drawings and specific embodiments, the utility model is described further.

Embodiment 1, as depicted in figs. 1 and 2, the present embodiment is vertically mounted on the top of desulfuration absorbing tower, and it comprises the cleaning device of two-stage demister and 4 layers of demister.First order demister is the horizontal mesh mist eliminator 8 being comprised of multiple horizontal mesh mist eliminator modules 1 from top to bottom, and second level demister is the Λ type mesh mist eliminator 9 being comprised of multiple Λ type mesh mist eliminator modules 2.Each Λ type mesh mist eliminator module 2 is fixedly formed by intermediate member 15 by two yi word pattern mesh mist eliminator modules 14.The mesh of the horizontal mesh mist eliminator module 1 of the first order is greater than the mesh of second level yi word pattern mesh mist eliminator module 14.Each module of every grade of demister can be erected on guide rail 7 respectively pull, and guide rail 7 is fixed on horizontal support beam 3, and horizontal support beam 3 is fixed in the top inner wall 34 of desulfuration absorbing tower.The sidepiece of desulfuration absorbing tower has the access hole of first order demister and second level demister.In the lower end of first order demister and upper end, be respectively arranged with just ground floor and the second

layer cleaning device

10,11 of the lower end to first order demister and upper end of nozzle 6, in the lower end of second level demister and upper end, be respectively arranged with just the 3rd layer and the 4th layer of

cleaning device

12,13 of the lower end to second level demister and upper end of nozzle 6.Ground floor, the second layer, the 3rd layer and the 4th layer of

cleaning device

10,11,12 and 13 are comprised of multiple nozzles 6 and pipeline 4 respectively, and multiple nozzles 6 are evenly fixed on pipeline 4, and pipeline 4 is fixed on bracing frame 5, and bracing frame 5 is fixed on brace summer 3.The cleaning medium of ground floor, the second layer and the 3rd layer of

cleaning device

10,11 and 12 is that the cleaning medium of the 4th layer of cleaning device 13 is air or steam through the fresh water (FW) of softening and film processing.Ground floor, the second layer, the 3rd layer and the 4th layer of

cleaning device

10,11,12 and 13 pipeline 4 are connected the input channel of cleaning medium by the pipe outlet arranging on desulfuration absorbing tower wall.35 is the sealing plate between the top inner wall 34 of demister and desulfuration absorbing tower.

Embodiment 2, as shown in figures 1 and 3, other structure of the present embodiment and installation, with embodiment 1, are the board-like demister 17 that first order demister is comprised of multiple board-like demister modules 16.

Embodiment 3, as shown in Figure 1 and Figure 4, other structure of the present embodiment and installation are with embodiment 1, the Λ type mesh mist eliminator 19 that just first order demister is comprised of multiple Λ type mesh mist eliminator modules 18, each Λ type mesh mist eliminator module 18 is fixedly formed by intermediate member 21 by two yi word pattern mesh mist eliminator modules 20.

Embodiment 4, as shown in Figure 1 and Figure 5, other structure of the present embodiment and installation are with embodiment 1, the Λ plate-type demister 23 that just first order demister is comprised of multiple Λ plate-type demister modules 22, each Λ plate-type demister modules 22 is fixedly formed by intermediate member 25 by two board-like demister modules 24 of yi word pattern.

Embodiment 5, as shown in Fig. 1 and Fig. 6, other structure of the present embodiment and installation are with embodiment 1, the V-type mesh mist eliminator 27 that just first order demister is comprised of multiple V-type mesh mist eliminator modules 26, each V-type mesh mist eliminator module 26 is fixedly formed by intermediate member 29 by two yi word pattern mesh mist eliminator modules 28.

Embodiment 6, as shown in Figure 1 and Figure 7, other structure of the present embodiment and installation are with embodiment 1, the V-type plate formula demister 31 that just first order demister is comprised of multiple V-type plate formula demister modules 30, each Λ plate-type demister modules 30 is fixedly formed by intermediate member 33 by two board-like demister modules 32 of yi word pattern.

Above-described embodiment is only preferred and exemplary, and those skilled in the art for example can be according to the description of this patent, adopts one-level demister and the secondary demister of other version, and it is all in the protection domain of this patent.

Claims

1. A coal-fired power plant flue gas desulfurization and mist removal device, which is vertically installed on the top of the desulfurization absorption tower, which includes two-stage demisters, is characterized in that: it also includes cleaning devices for 4-layer demisters; The first-stage mist eliminator above is a plate type mist eliminator composed of multiple plate type mist eliminator modules or a wire mesh eliminator composed of multiple wire mesh eliminator modules, and the second-stage mist eliminator is composed of A Λ-shaped wire mesh demister composed of multiple Λ-shaped wire mesh demister modules, each Λ-shaped wire mesh demister module is composed of two inline wire mesh demister modules fixed by an intermediate member ; The mesh hole of the wire mesh demister module of the first stage is larger than the mesh hole of the second-stage inline wire mesh demister module; each module of each stage demister can be erected on the guide rail separately, and the guide rail It is fixed on the cross support beam, and the cross support beam is fixed on the top inner wall of the desulfurization absorption tower; the side of the desulfurization absorption tower has access ports for the first-stage mist eliminator and the second-stage mist eliminator; The lower end and the upper end of the mist device are respectively provided with the first-layer and second-layer cleaning devices with nozzles facing the lower and upper ends of the first-stage demister, and the lower and upper ends of the second-stage demister are respectively provided with nozzles facing The third and fourth layer cleaning devices at the lower and upper ends of the second stage demister; the first, second, third and fourth layer cleaning devices are respectively composed of multiple nozzles and pipes, and multiple nozzles Evenly fixed on the pipe, the pipe is fixed on the support frame, and the support frame is fixed on the support beam; the cleaning medium of the first, second and third layer cleaning devices is softened and membrane-treated process water, and the fourth layer The cleaning medium of the cleaning device is air or steam; the pipes of the first, second, third and fourth floor cleaning devices are connected to the input pipes of the cleaning medium through the pipe outlets set on the wall of the desulfurization absorption tower.

2. The flue gas desulfurization and demisting device of a coal-fired power plant according to claim 1, characterized in that: the first-stage demister is a horizontal wire mesh demister composed of a plurality of horizontal wire mesh demister modules device.

3. The coal-fired power plant flue gas desulfurization and demisting device according to claim 1, characterized in that: the first-stage demister is a Λ-shaped wire mesh composed of a plurality of Λ-shaped wire mesh demister modules Demister, each Λ-shaped wire mesh demister module is composed of two inline wire mesh demister modules fixed by intermediate members.

4. The flue gas desulfurization and demisting device of a coal-fired power plant according to claim 1, characterized in that: the first-stage demister is a Λ-type plate demister composed of a plurality of Λ-type plate demister modules Each Λ-shaped plate demister module is composed of two inline plate demister modules fixed by intermediate members.

5. The flue gas desulfurization and demisting device of a coal-fired power plant according to claim 1, wherein the first-stage demister is a V-shaped wire mesh composed of a plurality of V-shaped wire mesh eliminator modules Demister, each V-shaped wire mesh demister module is composed of two inline wire mesh demister modules fixed by intermediate members.

6. The flue gas desulfurization and demisting device of a coal-fired power plant according to claim 1, wherein the first-stage demister is a V-shaped plate demister composed of a plurality of V-shaped plate demister modules Each V-shaped plate demister module is composed of two inline plate demister modules fixed by intermediate members.