Low-resistance flow guide uniform distribution device applied to denitration flue of coal-fired unit

Abstract

The utility model discloses a low-resistance flow guide uniform distribution device applied to a denitration flue of a coal-fired unit, which relates to the technical field of low-resistance flow guide uniform distribution and comprises a plurality of flow guide cylinders, the plurality of flow guide cylinders are sequentially connected in a sleeved mode with the same center shaft, each flow guide cylinder is provided with two opening ends, and the adjacent flow guide cylinders are fixedly connected together through a connecting frame. The flow guide cylinder has the advantages that the flow guide cylinder is placed at the corresponding position in a denitration flue of a coal-fired unit, the first air bag and the second air bag are inflated, so that the first air bag and the second air bag expand, the sealing gasket is driven to be tightly attached to the inner wall of a smoke pipe, the flow guide cylinder is fixedly installed on the inner wall of the smoke pipe, and the sealing gasket is tightly attached to the inner wall of the smoke pipe. Flue gas is shunted and decelerated through the gaps formed between the adjacent guide cylinders, uniform distribution of the flue gas is achieved, the installation mode is simple and rapid, operation is convenient, and the working efficiency of workers can be improved conveniently.

Description

Technical Field

[0001] The utility model relates to the field of low-resistance flow diversion and uniform distribution, in particular to a low-resistance flow diversion and uniform distribution device applied to a denitrification flue of a coal-fired unit. Background Art

[0002] The denitrification flue of the coal-fired unit is installed in a special flue at the tail end of the boiler of a coal-fired power plant. It is equipped with a denitrification device to convert nitrogen oxides in the flue gas into harmless substances, thereby reducing NOx emissions. This facility is of great significance for reducing the pollution of the atmosphere by coal-fired power plants and protecting the environment. A low-resistance diversion and uniform distribution device is set in this flue to reduce the flue resistance and achieve uniform distribution of the flue gas, thereby improving the denitrification efficiency.

[0003] In the prior art, the low-resistance flow diversion and uniform distribution device is mainly fixed in the flue by using connectors or flanges that match the piping system. However, there are certain limitations in the actual installation process. Since the structural parameters of the denitrification flue of different coal-fired units may be different, the low-resistance flow diversion and uniform distribution device may not be able to fully adapt to the flue conditions of the unit during installation, thereby causing flue gas leakage and affecting its diversion and uniform distribution effects. In addition, the low-resistance flow diversion and uniform distribution device needs to be regularly inspected and cleaned of accumulated dust and dirt inside the device to ensure its normal operation. The installation and disassembly of the existing low-resistance flow diversion and uniform distribution device takes a high amount of time and energy, and is inconvenient to use. Therefore, a low-resistance flow diversion and uniform distribution device applied to the denitrification flue of a coal-fired unit is proposed to solve the above problems. Utility Model Content

[0004] The purpose of the present utility model is to solve the problem in the prior art that due to certain differences in the structural parameters of the denitrification flues of different coal-fired units, the low-resistance flow diversion and uniform distribution device may not be able to fully adapt to the flue conditions of the unit during installation, thereby causing flue gas leakage, affecting its diversion and uniform distribution effects, and the low-resistance flow diversion and uniform distribution device needs to be regularly inspected and cleaned of dust and dirt inside the device to ensure its normal operation, while the installation and disassembly of the existing low-resistance flow diversion and uniform distribution device takes a high time and energy cost and is inconvenient to use. A low-resistance flow diversion and uniform distribution device applied to the denitrification flue of a coal-fired unit is proposed to solve the above problems.

[0005] In order to solve the problems existing in the prior art, the present invention adopts the following technical solutions:

[0006] A low-resistance flow diversion and uniform distribution device for use in a denitrification flue of a coal-fired unit, comprising:

[0007] A plurality of guide tubes are sleeved in sequence with the central axis, and each guide tube has two open ends. Adjacent guide tubes are fixedly connected together by a connecting frame, and gaps for airflow are formed between adjacent guide tubes. A first outer tube is fixedly provided on the outer wall of the lower open end of the guide tube, and the outer wall of the first outer tube is inserted into the smoke pipe. A limit assembly is provided on the outer wall of the first outer tube, and the limit assembly includes:

[0008] A first airbag and a sealing cushion, wherein the sealing cushion is fixedly arranged on the outer wall of the first airbag, and the first airbag is fixedly arranged on the outer wall of the first outer tube, and an inflation tube is fixedly arranged on the first airbag.

[0009] Preferably, a second outer tube is fixedly provided on the outer wall of the upper open end of the guide tube, and a second air bag is fixedly provided on the outer wall of the second outer tube. A telescopic tube is fixedly provided on the outer wall of the second air bag, and the inflation tube extends upward through the second outer tube.

[0010] Preferably, a closing cover for closing the telescopic tube is threadedly connected to the top of the telescopic tube, a placement opening is provided on the top of the second outer tube, and the closing cover is movably inserted into the placement opening.

[0011] Preferably, a push spring is fixedly provided on the inner wall of the placement opening, and the push spring is movably sleeved on the outer wall of the telescopic tube.

[0012] Preferably, a positioning opening is provided on the inner wall of the placement opening, a groove is provided on the outer wall of the closing cover, and a positioning block is movably engaged with the inner wall of the groove, and the positioning block is docked and engaged in the corresponding positioning opening.

[0013] Preferably, a spring bar is fixedly provided on the inner wall of the groove, and the other end of the spring bar is fixedly provided on the outer wall of the positioning block.

[0014] Preferably, a movable opening is provided on the top of the closing cover, and a push block is movably engaged with the inner wall of the movable opening, and the push block is fixedly connected to the positioning block.

[0015] Preferably, an adjustment slot is provided on the top of the push block.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] 1. In the present invention, a connection relationship among several guide tubes, a first outer tube, a first air bag, a second outer tube, a second air bag and a sealing gasket is set, so that by placing the guide tube at a corresponding position in the denitrification flue of the coal-fired unit, and by inflating the first air bag and the second air bag, the first air bag and the second air bag are expanded, so that the sealing gasket is driven to fit tightly against the inner wall of the smoke pipe, and the guide tube is fixedly installed on the inner wall of the smoke pipe. The smoke is diverted and decelerated through the gap formed between adjacent guide tubes, so that the smoke is evenly distributed. The installation method is simple and fast, easy to operate, and convenient to improve the work efficiency of workers. After the inflation is completed, the closing cover is pressed downward to insert the positioning block into and get stuck in the positioning port, so that the closing cover and the telescopic tube are restricted in the placement port, so that the surface of the second outer tube is flat, and the closing cover is prevented from bulging and affecting the subsequent connection of other equipment.

[0018] 2. In the present invention, a push spring is provided so that the positioning block can be disengaged from the positioning opening by pushing the push block. At this time, the pushing force of the push spring automatically pushes the telescopic tube upward, so that the telescopic tube and the closing cover are moved out of the placement opening, making it convenient for the user to contact and inflate or deflate them. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention.

[0020] In the attached figure:

[0021] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0022] Figure 2 This is a schematic diagram of the connecting frame structure of the present utility model;

[0023] Figure 3 This is a cross-sectional view of the guide tube assembly structure of the utility model;

[0024] Figure 4 This is a schematic structural diagram of the first outer cylinder of the present utility model;

[0025] Figure 5 This is a schematic structural diagram of the second outer cylinder of the present utility model;

[0026] Figure 6 This is a schematic diagram of the push spring structure of the utility model;

[0027] Figure 7 This is a cross-sectional view of the closure cover structure of the present invention.

[0028] Serial numbers in the figure: 1. guide tube; 101. connecting frame; 2. first outer tube; 201. first air bag; 202. inflation tube; 203. sealing gasket; 3. second outer tube; 301. second air bag; 302. telescopic tube; 303. placement port; 304. positioning port; 305. push spring; 4. closing cover; 401. spring bar; 402. positioning block; 403. moving port; 404. push block; 405. adjustment slot. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0030] Example: This example provides a low resistance flow distribution device for denitrification flue of coal-fired units, see Figure 1-7 , specifically, including:

[0031] A plurality of guide tubes 1 are sleeved in sequence on the same central axis, and each guide tube 1 has two open ends. Adjacent guide tubes 1 are fixedly connected together by a connecting frame 101, and a gap for airflow is formed between adjacent guide tubes 1. The flue gas in the denitrification flue of the coal-fired unit passes through the gap formed between the adjacent guide tubes 1 and is diverted and decelerated after being separated by the separation chamber separated by the rectifier connecting frame 101, so as to achieve uniform distribution of the flue gas. The upper part of the guide tube 1 is a straight tube and the lower part is a tapered tube, which minimizes the flow resistance of the flue gas and is convenient for application. A first outer tube 2 is fixedly provided on the outer wall of the lower open end of the guide tube 1, and the outer wall of the first outer tube 2 is inserted into the smoke pipe. A limiting component is provided on the outer wall of the first outer tube 2, which includes:

[0032] The first air bag 201 and the sealing gasket 203, the sealing gasket 203 is fixedly arranged on the outer wall of the first air bag 201, and the first air bag 201 is fixedly arranged on the outer wall of the first outer tube 2, and the first air bag 201 is fixedly arranged with an inflation tube 202. When in use, by placing the first outer tube 2 at the set position, connecting it to the inflation tube 202 through the inflation pump, and inflating the inflation tube 202, the gas enters the first air bag 201 through the inflation tube 202, causing the first air bag 201 to expand, thereby driving the sealing gasket 203 to fit tightly against the inner wall of the smoke tube, so that the first outer tube 2 is fixed to the inner wall of the smoke tube, and effectively preventing the airflow from leaking between the smoke tube wall and the outer wall of the first outer tube 2.

[0033] A second outer tube 3 is fixedly provided on the outer wall of the upper open end of the guide tube 1, and a second air bag 301 is fixedly provided on the outer wall of the second outer tube 3. A telescopic tube 302 is fixedly provided on the outer wall of the second air bag 301. The second air bag 301 is inflated through the telescopic tube 302 to expand the second air bag 301, and the use position of the second outer tube 3 is fixed, so that the guide tube 1 is installed at the use position. The installation method is simple, fast and convenient to use, and the inflation tube 202 extends upward through the second outer tube 3, which is convenient for the user to contact the inflation tube 202 and inflate the inflation tube 202.

[0034] The top of the telescopic tube 302 is connected with a closing cover 4 for closing the telescopic tube 302 through a threaded connection. After inflation is completed, the closing cover 4 is put on the top of the telescopic tube 302 and rotated to fix the closing cover 4 on the top of the telescopic tube 302 to seal the telescopic tube 302, thereby preventing gas leakage in the airbag and affecting the installation effect. A placement opening 303 is provided on the top of the second outer tube 3, and the closing cover 4 is movably inserted into the placement opening 303 to keep the surface of the second outer tube 3 flat, thereby preventing the closing cover 4 from bulging and affecting the subsequent connection of other equipment.

[0035] A push spring 305 is fixedly provided on the inner wall of the placement port 303, and the push spring 305 is movably sleeved on the outer wall of the telescopic tube 302. The pushing force of the push spring 305 automatically pushes the telescopic tube 302 upward, so that the telescopic tube 302 moves out of the placement port 303, making it convenient for the user to access it for inflating and deflating.

[0036] A positioning hole 304 is provided on the inner wall of the placement opening 303, and a groove is provided on the outer wall of the closing cover 4, and a positioning block 402 is movably connected to the inner wall of the groove, and the positioning block 402 is docked and clamped in the corresponding positioning hole 304, and a spring bar 401 is fixedly provided on the inner wall of the groove, and the other end of the spring bar 401 is fixedly provided on the outer wall of the positioning block 402. When the inflation is completed, the closing cover 4 is pressed downward to drive the positioning block 402 to move downward and be received in the placement opening 303. When the positioning block 402 moves to a position aligned with the positioning hole 304, the pushing force of the spring bar 401 pushes the positioning block 402 outward, so that the positioning block 402 moves outward and is inserted into and clamped in the positioning hole 304, so that the closing cover 4 and the telescopic tube 302 are restricted in the placement opening 303, and the surface of the second outer tube 3 is flat.

[0037] A movable opening 403 is provided on the top of the closing cover 4, and a push block 404 is movably connected to the inner wall of the movable opening 403. The push block 404 is fixedly connected to the positioning block 402. An adjustment slot 405 is provided on the top of the push block 404. When in use, the user pushes the push block 404 toward the center of the closing cover 4 through the adjustment slot 405, so that the moving push block 404 drives the positioning block 402 to move, so that the positioning block 402 is disengaged from the positioning opening 304, which is convenient for the subsequent removal of the closing cover 4 and the telescopic tube 302 from the placement opening 303.

[0038] Specifically, the working principle and operation method of the utility model are as follows:

[0039] When in use, the guide tube 1 is inserted into the denitrification flue of the coal-fired unit, and the air pump is connected to the air charging pipe 202 to inflate the air into the air charging pipe 202. The gas enters the first air bag 201 through the air charging pipe 202, causing the first air bag 201 to expand, thereby driving the sealing gasket 203 to fit tightly against the inner wall of the smoke pipe, thereby fixing the first outer tube 2 to the inner wall of the smoke pipe and effectively preventing the air flow from leaking between the smoke pipe wall and the outer wall of the first outer tube 2. Similarly, by connecting the air pump to the telescopic tube 302 and The telescopic tube 302 is inflated, and the gas enters the second airbag 301, causing the second airbag 301 to expand, thereby fixing the use position of the second outer tube 3, so that the guide tube 1 is installed in the use position. The installation method is simple, fast and convenient to use. After the inflation is completed, the closing cover 4 is put on the top of the telescopic tube 302 and rotated to fix the closing cover 4 on the top of the telescopic tube 302, thereby sealing the telescopic tube 302 and preventing the gas in the second airbag 301 from leaking and affecting the installation effect.

[0040] When inflation is completed, the closing cover 4 is pressed downward, so that the closing cover 4 drives the positioning block 402 to move downward and be received in the placement opening 303. When the positioning block 402 moves to a position aligned with the positioning opening 304, the pushing force of the spring bar 401 pushes the positioning block 402 outward, so that the positioning block 402 moves outward and is inserted into and stuck in the positioning opening 304, thereby restricting the closing cover 4 and the telescopic tube 302 in the placement opening 303, making the surface of the second outer tube 3 flat, avoiding the bulge of the closing cover 4 and affecting the subsequent connection of other equipment, and pushing the pushing block 404 toward the center direction of the closing cover 4 through the adjusting slot 405, so that the moving pushing block 404 drives the positioning block 402 to move, so that the positioning block 402 is separated from the positioning opening 304. At this time, the pushing force of the pushing spring 305 automatically pushes the telescopic tube 302 upward, so that the telescopic tube 302 and the closing cover 4 move out of the placement opening 303, making it convenient for the user to contact it for inflation and deflation.

[0041] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A low-resistance flow guide uniform distribution device for use in a denitrification flue of a coal-fired unit, comprising a plurality of flow guide tubes (1), wherein the plurality of flow guide tubes (1) are sequentially sleeved on a central axis, and each flow guide tube (1) has two open ends, adjacent flow guide tubes (1) are fixedly connected together by a connecting frame (101), and gaps for airflow are formed between adjacent flow guide tubes (1), characterized in that: A first outer cylinder (2) is fixedly provided on the outer wall of the lower open end of the guide cylinder (1), and the outer wall of the first outer cylinder (2) is inserted into the smoke pipe. A limiting component is provided on the outer wall of the first outer cylinder (2), and the limiting component comprises: A first airbag (201) and a sealing pad (203), wherein the sealing pad (203) is fixedly arranged on the outer wall of the first airbag (201), and the first airbag (201) is fixedly arranged on the outer wall of the first outer tube (2), and an inflation tube (202) is fixedly arranged on the first airbag (201).

2. The low-resistance flow diversion and uniform distribution device for a denitrification flue of a coal-fired unit according to claim 1, characterized in that: A second outer cylinder (3) is fixedly provided on the outer wall of the upper open end of the guide cylinder (1), and a second air bag (301) is fixedly provided on the outer wall of the second outer cylinder (3). A telescopic tube (302) is fixedly provided on the outer wall of the second air bag (301), and an inflation tube (202) passes through the second outer cylinder (3) and extends upward.

3. The low-resistance flow diversion and uniform distribution device for a denitrification flue of a coal-fired unit according to claim 2, characterized in that: The top of the telescopic tube (302) is connected to a closing cover (4) for closing the telescopic tube (302) via a thread, and a placement opening (303) is provided on the top of the second outer tube (3), and the closing cover (4) is movably inserted into the placement opening (303).

4. The low-resistance flow distribution device for denitrification flue of a coal-fired unit according to claim 3, characterized in that: A push spring (305) is fixedly provided on the inner wall of the placement opening (303), and the push spring (305) is movably sleeved on the outer wall of the telescopic tube (302).

5. The low-resistance flow diversion and uniform distribution device for a denitrification flue of a coal-fired unit according to claim 4, characterized in that: The inner wall of the placement opening (303) is provided with a positioning opening (304), the outer wall of the closing cover (4) is provided with a groove, and the inner wall of the groove is movably engaged with a positioning block (402), and the positioning block (402) is docked and engaged in the corresponding positioning opening (304).

6. The low-resistance flow distribution device for denitrification flue of a coal-fired unit according to claim 5, characterized in that: A spring bar (401) is fixedly arranged on the inner wall of the groove, and the other end of the spring bar (401) is fixedly arranged on the outer wall of the positioning block (402).

7. The low-resistance flow distribution device for denitrification flue of a coal-fired unit according to claim 5, characterized in that: The top of the closing cover (4) is provided with a movable opening (403), and the inner wall of the movable opening (403) is movably engaged with a push block (404), and the push block (404) is fixedly connected to the positioning block (402).

8. The low-resistance flow diversion and uniform distribution device for a denitrification flue of a coal-fired unit according to claim 7, characterized in that: An adjusting slot (405) is provided on the top of the push block (404).

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