Wet flue gas desulfurization demister

Abstract

The utility model discloses a wet flue gas desulfurization demister which comprises a desulfurization tower body, a first-layer flushing pipe, a first-stage demister, a second-layer flushing pipe, a third-layer flushing pipe and a second-stage demister are sequentially arranged in the desulfurization tower body from bottom to top, and the bottom of the desulfurization tower body is supported by flat steel. Nozzles are uniformly arranged on the first-layer flushing pipe, the second-layer flushing pipe and the third-layer flushing pipe, a supporting beam is welded on the flat steel, and the first-stage demister and the second-stage demister are fixed on the supporting beam through pressing plates. The demister has the beneficial effects that the demister and the flushing pipe are reasonably arranged, and the demister is fixed and limited through the flat steel, the supporting beam and the pressing plate, so that the demister is convenient and rapid to install, convenient to disassemble, assemble and maintain and the like, and is stable in structure; the internal flue gas is sprayed and desulfurized in a multi-layer spraying manner, and a two-stage desulfurization and demisting manner is adopted, so that better and finer desulfurization and demisting can be realized, and the desulfurization and demisting effects are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of desulfurization equipment, in particular to a wet flue gas desulfurization demister. Background Art

[0002] The demister uses physical methods, namely gravity, inertia, centrifugal force, water film, etc. to remove the mist droplets. During the operation of the absorption tower, it is easy to produce "mist" with a particle size of 10-60 microns. The "mist" not only contains water, but also contains sulfuric acid, sulfate, sulfur dioxide, etc. It also causes contamination and serious corrosion of the fan, heat exchanger and flue. Therefore, the wet flue gas desulfurization process requires demisting of the absorption equipment, and the purified gas must be demisted before leaving the absorption tower.

[0003] When the existing desulfurization demister is installed in the desulfurization tower, it is cumbersome to disassemble and maintain. It is easy to loosen after long-term use and spraying. It is necessary to improve the stability of the demister installation to meet the requirements of easy disassembly and maintenance, and to improve the desulfurization and demisting effect. Utility Model Content

[0004] The embodiment of the present application provides a wet flue gas desulfurization demister, in which the demister and the flushing pipe are reasonably arranged to ensure that the pipe is firmly fixed. The interior is not only convenient and quick to install, but also easy to disassemble and repair, and the structure is stable. A multi-layer spraying method is used to spray desulfurize the internal flue gas, and a two-stage desulfurization and demisting method is used. First, simple desulfurization and demisting are carried out through a coarse demister, and then desulfurization and demisting are carried out through a fine demister. The desulfurization and demisting can be carried out better and more precisely, thereby improving the desulfurization and demisting effect.

[0005] The embodiment of the present application provides a wet flue gas desulfurization demister, including: a desulfurization tower body, in which a first-layer flushing pipe, a first-stage demister, a second-layer flushing pipe, a third-layer flushing pipe and a second-stage demister are arranged in sequence from bottom to top, and the bottom is supported by flat steel, and nozzles are evenly arranged on the first-layer flushing pipe, the second-layer flushing pipe and the third-layer flushing pipe, and a support beam is welded on the flat steel, and the first-stage demister and the second-stage demister are fixed to the support beam by a pressure plate, and the outer circles of the first-stage demister and the second-stage demister are limited by an arc pressure plate.

[0006] The flat steel and the desulfurization tower body are locked and fixed by supporting plates and bolts, and the supporting plates are connected and fixed to the desulfurization tower body by welding.

[0007] The first-layer flushing pipe, the second-layer flushing pipe and the third-layer flushing pipe are provided with flanges at their left ends, and are provided on the tail pipe support at their right ends. A sleeve is provided on the outer ring of the flange, and the sleeve is close to the outer wall of the desulfurization tower body. The first-layer flushing pipe, the second-layer flushing pipe and the third-layer flushing pipe are arranged in parallel and evenly in the desulfurization tower body, and are provided with auxiliary pipelines through connecting pipes. Tail pipe supports are provided at both ends of the auxiliary pipelines, and the tail pipe supports are arranged on the inner wall of the desulfurization tower body by welding. An L-shaped support frame is fixed to the flat steel by bolts, and fixing holes are provided on the L-shaped support frame and the tail pipe support. Pipe clamps are provided in matching manner on the fixing holes, and the pipe clamps lock and fix the first-layer flushing pipe, the second-layer flushing pipe, the third-layer flushing pipe and the auxiliary pipeline through nuts.

[0008] The auxiliary pipeline is connected to the center positions of the first layer flushing pipe, the second layer flushing pipe and the third layer flushing pipe, the connecting pipe is perpendicular to the auxiliary pipeline, and corresponding nozzles are arranged on the auxiliary pipeline.

[0009] The nozzles on the first-layer flushing pipe and the third-layer flushing pipe face upward, and the nozzles on the second-layer flushing pipe face downward.

[0010] The first-stage demister is a coarse demister, and the second-stage demister is a fine demister. The main bodies of the first-stage demister and the second-stage demister are composed of baffles. The baffles are folded at an angle of 133°. The folded edges are trapezoidal in shape. The baffle on the first-stage demister has one folded edge, and the baffle on the second-stage demister has two symmetrical folded edges. The distance between the baffles on the first-stage demister is greater than the distance between the baffles on the second-stage demister.

[0011] One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages:

[0012] 1. The layout between the demister and the flushing pipe is reasonable. The demister is fixed and limited by flat steel, support beam and pressure plate. It is not only convenient and quick to install, easy to disassemble and repair, but also has a stable structure.

[0013] 2. The L-shaped support frame and tail pipe support, as well as the pipe clamp and lock nut, ensure that the pipeline is firmly fixed, will not loosen, and is easy to disassemble and assemble.

[0014] 3. A multi-layer spraying method is used to spray desulfurization on the internal flue gas, and a two-stage desulfurization and demisting method is used. First, simple desulfurization and demisting are carried out through a coarse demister, and then desulfurization and demisting are carried out through a fine demister. This can perform desulfurization and demisting better and more finely, thereby improving the effect of desulfurization and demisting. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the utility model;

[0016] Figure 2 This is a schematic diagram of the connection of the flat steel in the utility model;

[0017] Figure 3 It is a transverse cross-sectional view of the first layer of flushing pipe in the utility model;

[0018] Figure 4 Based Figure 3 The enlarged view of point A in the middle;

[0019] Figure 5 Based Figure 3 The enlarged view of point B in the middle;

[0020] Figure 6 It is a structural schematic diagram of the first-stage demister in the utility model;

[0021] Figure 7 It is a structural schematic diagram of the second-stage demister in the utility model;

[0022] Figure 8 It is a structural schematic diagram of the flange in the utility model. DETAILED DESCRIPTION

[0023] The embodiment of the present application provides a wet flue gas desulfurization demister, in which the demister and the flushing pipe are reasonably arranged to ensure that the pipe is firmly fixed. The interior is not only convenient and quick to install, but also easy to disassemble and repair, and the structure is stable. A multi-layer spraying method is used to spray desulfurize the internal flue gas, and a two-stage desulfurization and demisting method is used. First, simple desulfurization and demisting are carried out through a coarse demister, and then desulfurization and demisting are carried out through a fine demister. The desulfurization and demisting can be carried out better and more precisely, thereby improving the desulfurization and demisting effect.

[0024] In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0025] A wet flue gas desulfurization demister comprises: a desulfurization tower body 1, wherein the first layer flushing pipe 6, the first stage demister 5, the second layer flushing pipe 4, the third layer flushing pipe 3 and the second stage demister 2 are arranged in sequence from bottom to top in the desulfurization tower body 1, and the bottom is supported by a flat steel 9, and nozzles 7 are evenly arranged on the first layer flushing pipe 6, the second layer flushing pipe 4 and the third layer flushing pipe 3, and a support beam 11 is welded on the flat steel 9, and the first stage demister 5 and the second stage demister 2 are fixed on the support beam 11 by a pressing plate 10, and the outer circles of the first stage demister 5 and the second stage demister 2 are limited by an arc pressing plate 10, and the flat steel 9 and the desulfurization tower body 1 are locked and fixed by a support sheet 9-1 with bolts, and the support sheet 9-1 is connected and fixed to the desulfurization tower body 1 by welding.

[0026] The internal flue gas is sprayed and desulfurized by a multi-layer spraying method to improve the desulfurization and demisting effect. The demister and the flushing pipe are arranged reasonably. The demister is fixed and limited by the flat steel 9, the support beam 11 and the pressing plate 10. It is not only convenient and quick to install, easy to disassemble and maintain, but also has a stable structure.

[0027] The flat steel 9 is supported by the welded support sheet 9 - 1 , which can not only effectively share the gravity on the flat steel 9 , but also facilitate replacement of the flat steel 9 when it is deformed or rusted.

[0028] A wet flue gas desulfurization demister, wherein the left ends of the first-layer flushing pipe 6, the second-layer flushing pipe 4 and the third-layer flushing pipe 3 are provided with flanges 8, and the right ends are provided on tail pipe supports 17, the outer ring of the flange 8 is provided with a sleeve 8-1, and the sleeve 8-1 is close to the outer wall of the desulfurization tower body 1, the first-layer flushing pipe 6, the second-layer flushing pipe 4 and the third-layer flushing pipe 3 are arranged in parallel and evenly in the desulfurization tower body 1, and are provided with auxiliary pipelines 16 through connecting pipes 15, and tail pipe supports 17 are provided at both ends of the auxiliary pipelines 16, and the tail pipe supports 17 are arranged on the inner wall of the desulfurization tower body 1 by welding, and an L-shaped support frame 14 is fixed to the flat steel 9 by bolts, and fixing holes are provided on the L-shaped support frame 14 and the tail pipe support 17, and the fixing holes are matched with pipe clamps 13, and the pipe clamps 13 lock and fix the first-layer flushing pipe 6, the second-layer flushing pipe 4, the third-layer flushing pipe 3 and the auxiliary pipeline 16 through nuts;

[0029] The auxiliary pipeline 16 is connected to the center of the first-layer flushing pipe 6, the second-layer flushing pipe 4 and the third-layer flushing pipe 3, the connecting pipe 15 is perpendicular to the auxiliary pipeline 16, and the auxiliary pipeline 16 is provided with corresponding nozzles 7;

[0030] The nozzles 7 on the first-layer flushing pipes 6 and the third-layer flushing pipes 3 face upward, and the nozzles 7 on the second-layer flushing pipes 4 face downward.

[0031] A sleeve 8-1 is provided at the flange 8 to protect the flange 8, prevent wear, and increase the service life of the flushing pipe. The first-layer flushing pipe 6, the second-layer flushing pipe 4, and the third-layer flushing pipe 3 are all provided with a secondary pipe 16, which receives water from the flange 8. Each water inlet pipe can pass water from two pipes, which reduces the cost of the pipes and improves the density and uniformity of the spray.

[0032] The orientation of the nozzle 7 is set to effectively spray the inside;

[0033] By means of the L-shaped support frame 14 and the tail pipe support 17 and the pipe clamp 13 locked and fixed with the lock nut, not only the first-layer flushing pipe 6, the second-layer flushing pipe 4, the third-layer flushing pipe 3 and the auxiliary pipeline 16 are securely installed, but also they can be quickly disassembled during maintenance.

[0034] A wet flue gas desulfurization demister, wherein the first-stage demister 5 is a coarse demister, and the second-stage demister 2 is a fine demister. The first-stage demister 5 and the second-stage demister 2 are mainly composed of baffles, and the baffles are folded at an angle of 133°. The folded edges are trapezoidal in shape as a whole. The baffle on the first-stage demister 5 has one folded edge, and the baffle on the second-stage demister 2 has two symmetrical folded edges. The distance between the baffles on the first-stage demister 5 is greater than the distance between the baffles on the second-stage demister 2.

[0035] A two-stage defogger is adopted. Since the incoming flue gas contains impurities such as particles, simple defogger is required first. The baffle plate constituting the first-stage defogger 5 is provided with only one folded edge, and the baffle plate on the second-stage defogger 2 is provided with two folded edges. There is also a gap between the two baffle plates. The distance between the baffle plates on the first-stage defogger 5 can be adjusted to 6 / 5-7 / 5 of the distance between the baffle plates on the second-stage defogger 2.

[0036] The second-stage demister 2 has two folded edges, which can perform desulfurization and demisting better and more precisely, thereby improving the desulfurization and demisting effect.

[0037] Although the preferred embodiments of the present invention have been described, those skilled in the art may make other changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications falling within the scope of the present invention.

[0038] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A wet flue gas desulfurization demister, comprising: The desulfurization tower body is characterized in that: the first-layer flushing pipe, the first-stage demister, the second-layer flushing pipe, the third-layer flushing pipe and the second-stage demister are arranged in sequence from bottom to top in the desulfurization tower body, and the bottom is supported by flat steel. Nozzles are evenly arranged on the first-layer flushing pipe, the second-layer flushing pipe and the third-layer flushing pipe. A support beam is welded on the flat steel. The first-stage demister and the second-stage demister are fixed on the support beam by a pressure plate, and the outer circles of the first-stage demister and the second-stage demister are limited by an arc pressure plate.

2. A wet flue gas desulfurization demister according to claim 1, characterized in that: The flat steel and the desulfurization tower body are locked and fixed by supporting plates and bolts, and the supporting plates are connected and fixed to the desulfurization tower body by welding.

3. A wet flue gas desulfurization demister according to claim 1, characterized in that: The first-layer flushing pipe, the second-layer flushing pipe and the third-layer flushing pipe are provided with flanges at their left ends, and are provided on the tail pipe support at their right ends. A sleeve is provided on the outer ring of the flange, and the sleeve is close to the outer wall of the desulfurization tower body. The first-layer flushing pipe, the second-layer flushing pipe and the third-layer flushing pipe are arranged in parallel and evenly in the desulfurization tower body, and are provided with auxiliary pipelines through connecting pipes. Tail pipe supports are provided at both ends of the auxiliary pipelines, and the tail pipe supports are arranged on the inner wall of the desulfurization tower body by welding. An L-shaped support frame is fixed to the flat steel by bolts, and fixing holes are provided on the L-shaped support frame and the tail pipe support. Pipe clamps are provided in matching manner on the fixing holes, and the pipe clamps lock and fix the first-layer flushing pipe, the second-layer flushing pipe, the third-layer flushing pipe and the auxiliary pipeline through nuts.

4. A wet flue gas desulfurization demister as claimed in claim 3, characterized in that: The auxiliary pipeline is connected to the center positions of the first layer flushing pipe, the second layer flushing pipe and the third layer flushing pipe, the connecting pipe is perpendicular to the auxiliary pipeline, and corresponding nozzles are arranged on the auxiliary pipeline.

5. A wet flue gas desulfurization demister according to claim 1, characterized in that: The nozzles on the first-layer flushing pipe and the third-layer flushing pipe face upward, and the nozzles on the second-layer flushing pipe face downward.

6. A wet flue gas desulfurization demister according to claim 1, characterized in that: The first-stage demister is a coarse demister, and the second-stage demister is a fine demister. The main bodies of the first-stage demister and the second-stage demister are composed of baffles. The baffles are folded at an angle of 133°. The folded edges are trapezoidal in shape. The baffle on the first-stage demister has one folded edge, and the baffle on the second-stage demister has two symmetrical folded edges. The distance between the baffles on the first-stage demister is greater than the distance between the baffles on the second-stage demister.

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