Coal-fired boiler flue gas denitration and dust removal device

Abstract

The utility model discloses a coal-fired boiler flue gas denitration and dust removal device which comprises a working table, a dust removal box is arranged in the center of the top end of the working table, a filter screen is installed in the dust removal box, a drain outlet is formed in the bottom of the dust removal box at the position of the filter screen, a denitration box is arranged at the top end of the working table on one side of the dust removal box, and denitration liquid is filled in the denitration box. A temperature meter is mounted on one side of the surface of the heat exchange box; a water outlet is formed in the outer wall of one side, far away from the dust removal box, of the heat exchange box; a water filling nozzle is formed in one side of the top end of the heat exchange box; a snake-shaped heat exchange pipe is arranged in the heat exchange box; according to the utility model, not only is the phenomenon of environmental pollution caused by emission of heat energy in the flue gas into air reduced, but also the phenomenon of resource waste caused by heat energy loss can be effectively reduced, the purpose of automatically and efficiently denitrifying and dedusting the flue gas of the coal-fired boiler is achieved, and the phenomenon of blockage of the filter screen is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of flue gas treatment of coal-fired boilers, and specifically relates to a denitration and dust removal device for coal-fired boiler flue gas. Background Technique

[0002] The flue gas of coal-fired boilers contains a large amount of pollutants such as dust, sulfur dioxide and nitrogen oxides, which have a serious impact on the environment and human health. Therefore, denitration and dust removal treatment of coal-fired boiler flue gas to reduce pollutant emissions and protect the environment and human health has become an urgent problem to be solved.

[0003] A coal-fired boiler flue gas desulfurization, denitration and dust removal device with the reference publication number CN214597867U includes a gas guide pipe, a filtering mechanism, a discharging mechanism and a dust scraping mechanism; the filtering mechanism is used for filtering gas and is arranged inside the gas guide pipe, and includes a sliding plate slidably connected inside the gas guide pipe, and the sliding plate is provided with air holes; the dust scraping mechanism is used for cleaning the dust accumulated outside the sliding plate and includes a scraping plate slidably connected to the side wall of the gas guide pipe; the discharging mechanism is used for storing the dust scraped off by the dust scraping mechanism and is arranged on one side of the gas guide pipe away from the dust scraping mechanism. This coal-fired boiler flue gas desulfurization, denitration and dust removal device realizes the self-cleaning effect of the whole device by setting a filtering mechanism and a dust scraping mechanism that slide left and right to cooperate, so that when the filtering mechanism adheres to more dust, the dust scraping mechanism will clean the filtering mechanism. According to the above, although this device can be well applied, it is usually not convenient to recover and utilize the heat energy in the flue gas, resulting in the phenomenon that the heat energy in the flue gas is easily discharged into the air and pollutes the environment, and the waste of resources due to heat energy loss often troubles users. Summary of the Invention

[0004] The purpose of the utility model is to provide a denitration and dust removal device for coal-fired boiler flue gas to solve the problems raised in the above background technique that although the device can be well applied, it is usually not convenient to recover and utilize the heat energy in the flue gas, resulting in the phenomenon that the heat energy in the flue gas is easily discharged into the air and pollutes the environment, and the waste of resources due to heat energy loss.

[0005] To achieve the above object, the present utility model provides the following technical solutions: A denitrification and dust removal device for the flue gas of a coal-fired boiler, including a workbench. At the center position of the top end of the workbench, there is a dust removal box. Inside the dust removal box, a filter screen is installed. At the bottom of the dust removal box at the position of the filter screen, there is a sewage discharge port. At the top end of the workbench on one side of the dust removal box, there is a denitrification box. The inside of the denitrification box is filled with denitrification liquid. At the top end of the workbench on the other side of the dust removal box, there is a heat exchange box. On one side of the surface of the heat exchange box, a temperature gauge is installed. On the outer wall of the heat exchange box far from the dust removal box, there is a drain port. On one side of the top end of the heat exchange box, there is a water injection port. Inside the heat exchange box, there is a serpentine heat exchange tube. One end of the serpentine heat exchange tube is provided with an intake pipe, and the top end of the intake pipe extends to the outside of the heat exchange box. The other end of the serpentine heat exchange tube is provided with an exhaust pipe, and the top end of the exhaust pipe extends to the outside of the heat exchange box and is provided with a circulation pipe. The end of the circulation pipe far from the exhaust pipe is communicated with the outer wall of the dust removal box. The surface of the dust removal box is provided with a control panel. The input end of the single-chip microcomputer inside the control panel is electrically connected to the output end of the temperature gauge.

[0006] Preferably, a vertical plate is provided at the top end of the dust removal box, and a limiting rail is provided on the inner wall of the vertical plate. Through the setting of the limiting rail, it is convenient to place the rail seat.

[0007] Preferably, a blower unit is installed at the top end of the workbench in front of the dust removal box. The input end of the blower unit is electrically connected to the output end of the single-chip microcomputer inside the control panel. One end of the blower unit is communicated with the surface of the dust removal box through a conduit, and the other end of the blower unit extends to the bottom of the denitrification box through a conduit. Through the setting of the blower unit, it is convenient to suck the initially filtered flue gas inside the dust removal box into the denitrification liquid inside the denitrification box.

[0008] Preferably, a rail seat is slidably connected to the outer wall of the upper end of the limiting rail, and a lifting plate is provided on the outer wall of the rail seat. Through the setting of the rail seat, it is convenient to limit the movement range of the lifting plate in cooperation with the limiting rail.

[0009] Preferably, a scraper is provided on the outer wall of the lifting plate on the side far from the rail seat. The bottom end of the scraper extends into the dust removal box. An L-shaped connecting seat is fixed on the outer wall of the lifting plate above the scraper. Through the setting of the scraper, it is convenient to scrape and clean the outer wall of the filter screen.

[0010] Preferably, an electric push rod is installed on the outer wall of the vertical plate above the limiting rail through a bracket. The input end of the electric push rod is electrically connected to the output end of the single-chip microcomputer inside the control panel. The bottom end of the electric push rod is connected to the top end of the L-shaped connecting seat. Through the setting of the electric push rod, it is convenient to drive the scraper to lift.

[0011] Compared with the prior art, the beneficial effects of the present utility model are as follows: The flue gas denitration and dust removal device for the coal-fired boiler not only reduces the phenomenon of environmental pollution caused by the emission of heat energy in the flue gas into the air, but also can effectively reduce the phenomenon of resource waste caused by heat energy loss. It also achieves the purpose of efficiently denitrifying and removing dust from the flue gas of the coal-fired boiler automatically, and reduces the phenomenon of blockage of the filter screen.

[0012] The flue gas enters the inside of the serpentine heat exchange tube through the air inlet pipe and circulates, so that the heat energy in the flue gas is exchanged to the water source inside the heat exchange box. Since the thermometer monitors the temperature of the water source inside the heat exchange box, when the water source reaches the set temperature, the drainage mechanism discharges and collects the hot water, and the water supply mechanism injects new cold water into the heat exchange box, thus achieving the purpose of recycling the heat energy in the flue gas. Thereby, the phenomenon of environmental pollution caused by the emission of heat energy in the flue gas into the air is reduced, and the phenomenon of resource waste caused by heat energy loss can be effectively reduced.

[0013] Through the setting of the filter screen, the dust in the flue gas is filtered. Subsequently, the exhaust fan group sucks the preliminarily filtered flue gas into the denitration liquid inside the denitration box, and the denitration liquid performs denitration treatment on this part of the flue gas, thereby achieving the purpose of efficiently denitrifying and removing dust from the flue gas of the coal-fired boiler automatically.

[0014] The electric push rod drives the lifting plate to move downward through the L-shaped connecting seat, so that the lifting plate drives the scraper to move downward. Then, the scraper can scrape and clean the outer wall of the filter screen, so that the dust attached to the outer wall of the filter screen falls to the bottom of the dust removal box and can be discharged through the sewage outlet, thereby reducing the phenomenon of blockage of the filter screen. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a three-dimensional structural schematic diagram of the present utility model;

[0016] Figure 2 is a structural schematic diagram of the serpentine heat exchange tube of the present utility model;

[0017] Figure 3 is a front view sectional structural schematic diagram of the dust removal box of the present utility model;

[0018] Figure 4 is a side view enlarged structural schematic diagram of the lifting plate of the present utility model.

[0019] In the figure: 1, workbench; 2, dust removal box; 3, control panel; 4, heat exchange box; 5, thermometer; 6, drain port; 7, water injection port; 8, air inlet pipe; 9, air outlet pipe; 10, circulation pipe; 11, scraper; 12, vertical plate; 13, lifting plate; 14, denitration box; 15, denitration liquid; 16, exhaust fan group; 17, serpentine heat exchange tube; 18, filter screen; 19, sewage outlet; 20, rail seat; 21, limit rail; 22, electric push rod; 23, L-shaped connecting seat. Specific embodiments

[0020] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0021] Please refer to Figures 1-4 , an embodiment provided by the present invention: a denitration and dust removal device for flue gas of a coal-fired boiler, including a workbench 1. At the center of the top of the workbench 1, a dust removal box 2 is provided. At the top of the dust removal box 2, a vertical plate 12 is provided, and a limiting rail 21 is provided on the inner wall of the vertical plate 12;

[0022] During use, through the setting of the limiting rail 21, the rail seat 20 can be placed and processed;

[0023] The outer wall of the upper end of the limiting rail 21 is slidably connected with a rail seat 20, and a lifting plate 13 is provided on the outer wall of the rail seat 20;

[0024] During use, through the setting of the rail seat 20, the movement amplitude of the lifting plate 13 can be limited in cooperation with the limiting rail 21;

[0025] A scraper 11 is provided on the outer wall of the lifting plate 13 away from the rail seat 20. The bottom end of the scraper 11 extends into the dust removal box 2, and an L-shaped connecting seat 23 is fixed on the outer wall of the lifting plate 13 above the scraper 11;

[0026] During use, through the setting of the scraper 11, the outer wall of the filter screen 18 can be scraped and cleaned;

[0027] An electric push rod 22 is installed on the outer wall of the vertical plate 12 above the limiting rail 21 through a bracket. The input end of the electric push rod 22 is electrically connected to the output end of the single-chip microcomputer inside the control panel 3, and the bottom end of the electric push rod 22 is connected to the top end of the L-shaped connecting seat 23;

[0028] During use, through the setting of the electric push rod 22, the scraper 11 can be driven to lift;

[0029] A suction fan group 16 is installed on the top of the workbench 1 in front of the dust removal box 2. The input end of the suction fan group 16 is electrically connected to the output end of the single-chip microcomputer inside the control panel 3. One end of the suction fan group 16 is communicated with the surface of the dust removal box 2 through a conduit, and the other end of the suction fan group 16 extends to the bottom of the denitration box 14 through a conduit;

[0030] During use, through the setting of the suction fan group 16, the initially filtered flue gas inside the dust removal box 2 can be sucked into the denitration liquid 15 inside the denitration box 14;

[0031] A filter screen 18 is installed inside the dust removal box 2. A sewage discharge port 19 is provided at the bottom of the dust removal box 2 at the position of the filter screen 18. A denitration box 14 is provided at the top of the workbench 1 on one side of the dust removal box 2. The denitration liquid 15 is filled inside the denitration box 14. A heat exchange box 4 is provided at the top of the workbench 1 on the other side of the dust removal box 2. A temperature gauge 5 is installed on one side of the surface of the heat exchange box 4. A drain port 6 is provided on the outer wall of the heat exchange box 4 away from the dust removal box 2. A water injection port 7 is provided on one side of the top of the heat exchange box 4. A serpentine heat exchange tube 17 is provided inside the heat exchange box 4. One end of the serpentine heat exchange tube 17 is provided with an air inlet pipe 8. The top end of the air inlet pipe 8 extends to the outside of the heat exchange box 4. The other end of the serpentine heat exchange tube 17 is provided with an air outlet pipe 9. The top end of the air outlet pipe 9 extends to the outside of the heat exchange box 4 and is provided with a circulation pipe 10. One end of the circulation pipe 10 away from the air outlet pipe 9 is communicated with the outer wall of the dust removal box 2. A control panel 3 is installed on the surface of the dust removal box 2. The input end of the single-chip microcomputer inside the control panel 3 is electrically connected with the output end of the temperature gauge 5.

[0032] When the embodiment of the present application is in use, first, an external water supply mechanism is connected through the water injection port 7, and an external drainage mechanism is connected through the drain port 6, and a flue gas emission mechanism of a coal-fired boiler is connected through the air inlet pipe 8. Then, water is first injected into the heat exchange box 4. When the flue gas generated by the coal-fired boiler enters the inside of the serpentine heat exchange tube 17 for circulation through the air inlet pipe 8, the heat energy in the flue gas is exchanged to the water source inside the heat exchange box 4. Since the temperature gauge 5 monitors the temperature of the water source inside the heat exchange box 4, when the water source reaches the set temperature, the hot water is discharged and collected by the drainage mechanism, and the water supply mechanism injects new cold water into the heat exchange box 4 to achieve the purpose of recycling the heat energy in the flue gas. After that, the flue gas after circulating inside the serpentine heat exchange tube 17 flows into the inside of the dust removal box 2 through the air outlet pipe 9 and the circulation pipe 10. Through the setting of the filter screen 18, the dust in the flue gas is preliminarily filtered. Then, the exhaust fan group 16 sucks the preliminarily filtered flue gas into the denitration liquid 15 inside the denitration box 14, and the denitration liquid 15 performs denitration treatment on this part of the flue gas to achieve the purpose of denitration and dust removal of the flue gas of the coal-fired boiler. Finally, the electric push rod 22 drives the lifting plate 13 to move downward through the L-shaped connecting seat 23, so that the lifting plate 13 drives the scraper 11 to move downward, and then the outer wall of the filter screen 18 can be scraped and cleaned by the scraper 11, so that the dust attached to the outer wall of the filter screen 18 falls to the bottom of the dust removal box 2 and can be discharged through the sewage discharge port 19, thereby effectively reducing the phenomenon of blockage of the filter screen 18. After the outer wall of the filter screen 18 is cleaned, the scraper 11 moves upward and resets to its original position to facilitate the filter screen 18 to continue filtering and purifying the flue gas. In addition, when the lifting plate 13 moves up and down, the lifting plate 13 drives the rail seat 20 to slide on the outer wall of the limit rail 21 to ensure that the lifting plate 13 is relatively stable during the lifting process, thus completing the use of the denitration and dust removal device.

Claims

1. A coal-fired boiler flue gas denitrification and dust removal device, characterized in that: The invention comprises a workbench (1), wherein a dust removal box (2) is provided at the center position of the top of the workbench (1), a filter screen (18) is installed inside the dust removal box (2), a sewage outlet (19) is provided at the bottom of the dust removal box (2) at the position of the filter screen (18), a denitration box (14) is provided at the top of the workbench (1) on one side of the dust removal box (2), the interior of the denitration box (14) is filled with denitration liquid (15), a heat exchange box (4) is provided at the top of the workbench (1) on the other side of the dust removal box (2), a temperature meter (5) is installed on one side of the surface of the heat exchange box (4), a drainage outlet (6) is provided on the outer wall of the heat exchange box (4) on the side away from the dust removal box (2), and the top of the heat exchange box (4) is provided with a denitration box (14). A water inlet (7) is provided on one side of the heat exchange box (4); a serpentine heat exchange tube (17) is provided inside the heat exchange box (4); an air inlet pipe (8) is provided at one end of the serpentine heat exchange tube (17); the top end of the air inlet pipe (8) extends to the outside of the heat exchange box (4); an air outlet pipe (9) is provided at the other end of the serpentine heat exchange tube (17); the top end of the air outlet pipe (9) extends to the outside of the heat exchange box (4) and is provided with a circulation pipe (10); the end of the circulation pipe (10) away from the air outlet pipe (9) is connected to the outer wall of the dust removal box (2); a control panel (3) is installed on the surface of the dust removal box (2); the input end of the single-chip microcomputer inside the control panel (3) is electrically connected to the output end of the temperature meter (5).

2. A coal-fired boiler flue gas denitrification and dust removal device according to claim 1, characterized in that: A vertical plate (12) is provided at the top of the dust removal box (2), and a limiting rail (21) is provided on the inner wall of the vertical plate (12).

3. A coal-fired boiler flue gas denitrification and dust removal device according to claim 1, characterized in that: An exhaust fan unit (16) is installed on the top of the workbench (1) in front of the dust removal box (2); an input end of the exhaust fan unit (16) is electrically connected to an output end of a single-chip microcomputer inside the control panel (3); one end of the exhaust fan unit (16) is connected to the surface of the dust removal box (2) through a conduit; and the other end of the exhaust fan unit (16) extends to the bottom of the denitration box (14) through a conduit.

4. A coal-fired boiler flue gas denitrification and dust removal device according to claim 2, characterized in that: A rail seat (20) is slidably connected to the outer wall of the upper end of the limiting rail (21), and a lifting plate (13) is provided on the outer wall of the rail seat (20).

5. A coal-fired boiler flue gas denitrification and dust removal device according to claim 4, characterized in that: A scraper (11) is provided on the outer wall of the lifting plate (13) on the side away from the rail seat (20), the bottom end of the scraper (11) extends into the interior of the dust removal box (2), and an L-shaped connecting seat (23) is fixed on the outer wall of the lifting plate (13) above the scraper (11).

6. A coal-fired boiler flue gas denitrification and dust removal device according to claim 5, characterized in that: An electric push rod (22) is mounted on the outer wall of the vertical plate (12) above the limit rail (21) via a bracket, the input end of the electric push rod (22) is electrically connected to the output end of the single chip microcomputer inside the control panel (3), and the bottom end of the electric push rod (22) is connected to the top end of the L-shaped connecting seat (23).

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