A boiler flue gas desulfurization and denitrification energy-saving and environmentally friendly device

Abstract

The present application discloses a boiler flue gas desulfurization and denitrification energy-saving and environmental protection device, which belongs to the technical field of boiler flue gas treatment. It includes a zigzag shell, the inner wall of which is fixedly provided with a concave seat and an arc-shaped plate, and the two side surfaces of the zigzag shell are both threadedly installed with a U-shaped sealing plate, one of the U-shaped sealing plates is fixedly connected with an air inlet pipe and a liquid outlet pipe, and the end of the air inlet pipe away from the U-shaped sealing plate is threadedly connected to the combustion furnace, and the boiler flue gas is first burned by the combustion furnace to convert SO, CO and NO in the flue gas into carbon dioxide and NOX for treatment, and the high-temperature flue gas flows through the Z-shaped airway, and is desulfurized and denitrified by a corrugated filter plate, and the flue gas flow rate is slowed down, and the oxidation absorption liquid of chloric acid for atomized desulfurization and denitrification is sprayed in opposite directions by two rows of vertical pipes arranged side by side, so that the flue gas forms convection, slows down the escape of high-temperature flue gas, and effectively saves energy and reduces consumption, and the flue gas treated by desulfurization and denitrification can be treated by dust filtration by adsorption cotton, so as to achieve energy-saving and environmental protection treatment.

Description

Technical Field

[0001] The present application relates to the technical field of boiler flue gas treatment, and more specifically, to an energy-saving and environmentally friendly device for desulfurization and denitrification of boiler flue gas. Background Art

[0002] During the production of boilers, high-temperature flue gas is generated, which is often accompanied by a large amount of harmful gases such as SO2, SO, CO and NOx. In order to prevent excessive SO2, SO and NOx in the high-temperature flue gas generated by the boiler from polluting the environment, the flue gas should be denitrated and desulfurized to achieve the purpose of environmentally friendly emissions. The existing public technology number CN115845601A proposes an industrial boiler flue gas desulfurization and denitrification energy-saving and environmentally friendly device. The device uses electrostatic dust removal components and bag dust removal components to adsorb and filter dust, and can clean the dust to improve the dust removal efficiency. The result is that the flue gas is fully in contact with the denitration catalyst and the desulfurizer through the purification mechanism to improve the purification efficiency. In view of the above-mentioned related technologies, the utility model author believes that the following defects still exist: the flue gas treatment device in the comparative literature uses a denitration catalyst and a desulfurizer to carry out desulfurization and denitrification treatment. Because the high-temperature flue gas has strong fluidity and the buffering time in the treatment equipment is very short, the desulfurization and denitrification will not be thorough enough. Usually, the desulfurization and denitrification work needs to be repeated, resulting in large consumables and poor energy-saving and environmental protection effects. In view of this, we propose a boiler flue gas desulfurization and denitrification energy-saving and environmental protection device. Utility Model Content

[0003] 1. Technical issues to be solved

[0004] The purpose of the present application is to provide an energy-saving and environmentally friendly device for desulfurization and denitrification of boiler flue gas, which solves the problem that the flue gas treatment device in the comparative literature in the above-mentioned background technology uses a denitrification catalyst and a desulfurizer for desulfurization and denitrification treatment. Because the fluidity of the high-temperature flue gas is very strong and the buffering time in the treatment equipment is very short, the desulfurization and denitrification will not be thorough enough, and the desulfurization and denitrification work usually needs to be repeated, resulting in large consumables and poor energy-saving and environmental protection effects. The boiler flue gas is first burned through a combustion furnace to burn SO, CO and NO in the flue gas and convert them into carbon dioxide and NOX for treatment. The high-temperature flue gas flows through a Z-shaped airway and is desulfurized and denitrified by a corrugated filter plate, and the flue gas flow rate is slowed down. The two rows of vertical pipes arranged side by side spray out the oxidizing absorption liquid of chloric acid for atomized desulfurization and denitrification in opposite directions, so that the flue gas forms convection, slows down the escape of the high-temperature flue gas, and effectively saves energy and reduces consumption. The flue gas treated with desulfurization and denitrification can be filtered by adsorption cotton to filter dust, thereby achieving the technical effect of energy-saving and environmental protection treatment.

[0005] 2. Technical solution

[0006] The technical solution of the present application provides an energy-saving and environmentally friendly device for desulfurization and denitration of boiler flue gas, comprising: a jigsaw shell, the inner wall of which is fixedly provided with a concave seat and an arc plate, both side surfaces of the jigsaw shell are threadedly installed with U-shaped sealing plates, an air inlet pipe and a liquid outlet pipe are fixedly connected to one of the U-shaped sealing plates, one end of the air inlet pipe away from the U-shaped sealing plate is threadedly connected to the combustion furnace, a desulfurization and denitration tank is provided on the concave seat, one end of the liquid outlet pipe is connected to the desulfurization and denitration tank, two first baffles and two second baffles are fixedly provided between the jigsaw shell and the concave seat, and the second baffles are respectively provided at two At both sides of the first partition, corrugated filter plates are plug-in installed on both sides of the second partition, the concave seat is located between the second partition and the inner wall of the several-shaped shell and has a plurality of air inlet grooves, the upper end of the several-shaped shell is fixedly connected with an exhaust pipe, and adsorption cotton is detachably plug-in installed on the exhaust pipe, and a dust collecting box is threadedly installed on the bottom end of the arc plate through a threaded structure, and an atomizing desulfurization and denitrification mechanism is installed on the several-shaped shell, and the atomizing desulfurization and denitrification mechanism includes two transverse pipes, which are arranged between the two first partitions, and the transverse pipes are respectively fixedly connected with a plurality of vertical pipes, and the vertical pipes extend into the several-shaped shell.

[0007] By adopting the above technical scheme, the boiler flue gas first enters the combustion furnace for combustion treatment, so that SO, CO and NO in the flue gas are burned and converted into carbon dioxide and NOX for treatment. The high-temperature flue gas enters the arc plate through the air intake pipe, and enters between the second partition plate and the several-shaped shell through the air intake grooves opened on both sides of the concave seat. The sulfur dioxide and NOX in the high-temperature flue gas can be desulfurized and denitrified by the corrugated filter plate, and the corrugated filter plate can slow down the flow rate of the flue gas, so that the effect of desulfurization and denitrification is significantly improved, and energy saving and consumption reduction are effectively achieved. Part of the high-temperature flue gas that has not been desulfurized and denitrified enters the first partition plate In between, multiple vertical pipes connected by horizontal pipes spray atomized chloric acid oxidation absorption liquid for desulfurization and denitrification in opposite directions. The opposite spraying form can make the high-temperature flue gas form convection between the first baffles, and slow down the escape of high-temperature flue gas, thereby effectively saving energy and reducing consumption, further desulfurization and denitrification treatment, and forming a liquid form to be retained in the desulfurization and denitrification pool, and the purpose of collection can be achieved through the liquid outlet pipe. The flue gas after desulfurization and denitrification treatment enters the exhaust pipe, and can be filtered by adsorption cotton for dust treatment. Then, the high-temperature flue gas after desulfurization and denitrification treatment is subsequently cooled through the exhaust pipe, thereby achieving energy-saving and environmental protection treatment.

[0008] Optionally, a plurality of mounting holes are provided at the bottom end of the U-shaped shell, and the U-shaped sealing plate is sealed and connected to the U-shaped shell via a sealing gasket.

[0009] By adopting the above technical solution, the Ji-shaped shell is fixed and installed by using bolts through the installation holes, and the U-shaped sealing plate is sealed and connected to the Ji-shaped shell. By removing the U-shaped sealing plate, the corrugated filter plate can be replaced and maintained.

[0010] Optionally, air passages are provided between the second partition plate and the inner wall of the quadrilateral shell and between the second partition plate and the first partition plate, and the air passages are in a Z-shaped structure and are connected to the exhaust pipe.

[0011] By adopting the above technical solution, the flue gas treated by combustion in the combustion furnace will flow along the air passage of the Z-shaped structure to between the first partitions, and then escape into the exhaust pipe.

[0012] Optionally, an activated carbon plate is arranged on the corrugated filter plate, the horizontal pipe is connected to a tank body through a pipeline and a pump device, and an oxidizing absorption liquid containing chloric acid is stored in the tank body, and a plurality of atomizing spray holes are arranged on the vertical pipe.

[0013] By adopting the above technical solution, two rows of vertical pipes arranged side by side can spray out the chloric acid oxidation absorption liquid with an atomization structure, so that the high-temperature flue gas between the first partitions forms convection, thereby extending the retention time of the high-temperature flue gas.

[0014] Optionally, a stop valve is rotatably mounted on the liquid outlet pipe, and the liquid outlet pipe is threadedly connected to a liquid pump via a threaded structure.

[0015] By adopting the above technical solution, the liquid outlet pipe is provided with a stop valve, so that the treated liquid inside the desulfurization and denitrification tank can be centrally treated.

[0016] 3. Beneficial effects

[0017] One or more technical solutions provided in the technical solution of the present application have at least the following technical effects or advantages: the boiler flue gas is first treated by combustion in a combustion furnace, so that SO, CO and NO in the flue gas are burned and converted into carbon dioxide and NOX for treatment, and the high-temperature flue gas flows through a Z-shaped airway, and is treated by desulfurization and denitrification using a corrugated filter plate, and the flue gas flow rate is slowed down, and the oxidation absorption liquid of chloric acid for atomized desulfurization and denitrification is sprayed in opposite directions by two rows of vertical pipes arranged side by side, so that the flue gas forms convection, and the escape of high-temperature flue gas is slowed down, which effectively saves energy and reduces consumption, and the flue gas treated with desulfurization and denitrification can be treated by filtering dust with adsorption cotton to achieve energy-saving and environmentally friendly treatment. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the overall structure of a boiler flue gas desulfurization and denitrification energy-saving and environmentally friendly device disclosed in a preferred embodiment of the present application;

[0019] Figure 2 A schematic diagram of the atomizing desulfurization and denitrification mechanism and the corrugated filter plate structure of a boiler flue gas desulfurization and denitrification energy-saving and environmentally friendly device disclosed in a preferred embodiment of the present application;

[0020] Figure 3 A boiler flue gas desulfurization and denitrification energy-saving and environmentally friendly device disclosed in a preferred embodiment of the present application Figure 2 The enlarged structural diagram at A in the middle;

[0021] Figure 4 A schematic diagram of the internal structure of a geometric shell of a boiler flue gas desulfurization and denitration energy-saving and environmentally friendly device disclosed in a preferred embodiment of the present application;

[0022] Explanation of the numbers in the figure: 1. Geometric shell; 11. Mounting hole; 12. Concave seat; 121. Desulfurization and denitrification tank; 122. Air inlet groove; 13. Arc plate; 14. First partition plate; 15. Second partition plate; 2. U-shaped sealing plate; 3. Air inlet pipe; 4. Liquid outlet pipe; 5. Dust collecting box; 6. Atomization desulfurization and denitrification mechanism; 61. Horizontal pipe; 62. Vertical pipe; 7. Exhaust pipe; 71. Adsorption cotton; 8. Corrugated filter plate. DETAILED DESCRIPTION

[0023] The present application is further described in detail below in conjunction with the accompanying drawings.

[0024] Reference Figures 1 to 4The embodiment of the present application provides a boiler flue gas desulfurization and denitrification energy-saving and environmental protection device, comprising: a jigsaw shell 1, a concave seat 12 and an arc plate 13 are fixedly provided on the inner wall of the jigsaw shell 1, and U-shaped sealing plates 2 are threadedly installed on both side surfaces of the jigsaw shell 1, an air inlet pipe 3 and a liquid outlet pipe 4 are fixedly connected to one U-shaped sealing plate 2, and one end of the air inlet pipe 3 away from the U-shaped sealing plate 2 is threadedly connected to the combustion furnace, a desulfurization and denitrification tank 121 is opened on the concave seat 12, and one end of the liquid outlet pipe 4 is connected to the desulfurization and denitrification tank 121, and two first baffles 14 and two second baffles 15 are fixedly provided between the jigsaw shell 1 and the concave seat 12, and the second baffles 1 5 are respectively arranged at both sides of the two first partitions 14, and the corrugated filter plates 8 are installed on both sides of the second partition 15 in a plug-in manner. The concave seat 12 is located between the second partition 15 and the inner wall of the several-shaped shell 1 and has a plurality of air inlet grooves 122. The upper end of the several-shaped shell 1 is fixedly connected with an exhaust pipe 7, and the exhaust pipe 7 is detachably plugged and installed with adsorption cotton 71. The bottom end of the arc plate 13 is threadedly installed with a dust collecting box 5 through a threaded structure. The several-shaped shell 1 is installed with an atomizing desulfurization and denitrification mechanism 6, which includes two transverse pipes 61, which are arranged between the two first partitions 14, and the transverse pipes 61 are respectively fixedly connected with a plurality of vertical The vertical pipe 62 extends into the several-shaped shell 1. The boiler flue gas first enters the combustion furnace for combustion treatment, so that SO, CO and NO in the flue gas are burned and converted into carbon dioxide and NOX. The high-temperature flue gas enters the arc plate 13 through the air inlet pipe 3, and enters between the second partition plate 15 and the several-shaped shell 1 through the air inlet grooves 122 opened on both sides of the concave seat 12. The sulfur dioxide and NOX in the high-temperature flue gas can be desulfurized and denitrified by the corrugated filter plate 8, and the corrugated filter plate 8 can slow down the flow rate of the flue gas, so that the effect of desulfurization and denitrification is significantly improved, and energy saving and consumption reduction are effectively achieved. Part of the high-temperature flue gas that has not been desulfurized and denitrified enters the first partition plate 15. Between the plates 14, a plurality of vertical pipes 62 connected by a horizontal pipe 61 spray out oxidative absorption liquid of chloric acid for atomized desulfurization and denitrification in opposite directions. The opposite spraying form can make the high-temperature flue gas form convection between the first partition plates 14, and slow down the escape of the high-temperature flue gas, thereby effectively saving energy and reducing consumption, further desulfurization and denitrification treatment, and forming a liquid form to be retained inside the desulfurization and denitrification pool 121, and the purpose of collection can be achieved through the liquid outlet pipe 4. The flue gas after the desulfurization and denitrification treatment enters the exhaust pipe 7, and can be filtered by the adsorption cotton 71 for dust treatment. Then, the high-temperature flue gas after the desulfurization and denitrification treatment is subsequently cooled through the exhaust pipe 7, so as to achieve energy-saving and environmental protection treatment.

[0025] Reference Figure 1 and Figure 2 A plurality of mounting holes 11 are provided at the bottom end of the jigsaw-shaped shell 1, and the U-shaped sealing plate 2 is sealed and connected to the jigsaw-shaped shell 1 through a sealing gasket. The jigsaw-shaped shell 1 is fixed and installed by limiting positions using bolts through the mounting holes 11. The U-shaped sealing plate 2 is sealed and connected to the jigsaw-shaped shell 1. By disassembling the U-shaped sealing plate 2, the corrugated filter plate 8 can be replaced and maintained.

[0026] Reference Figure 2 and Figure 4 Airways are arranged between the second partition plate 15 and the inner wall of the hollow shell 1 and between the second partition plate 15 and the first partition plate 14, and the airways are in a Z-shaped structure and are connected to the exhaust pipe 7. The flue gas treated by combustion in the combustion furnace will flow along the Z-shaped airway to the first partition plate 14, and then escape into the exhaust pipe 7.

[0027] Reference Figure 1 and Figure 2 An activated carbon plate is arranged on the corrugated filter plate 8, the horizontal pipe 61 is connected to a tank body through a pipeline and a pump device, and an oxidizing absorption liquid containing chloric acid is stored in the tank body, and a plurality of atomizing spray holes are arranged on the vertical pipes 62. The two rows of vertical pipes 62 arranged side by side can spray out the oxidizing absorption liquid of chloric acid with an atomizing structure, so that the high-temperature flue gas between the first partition plates 14 forms convection, thereby prolonging the retention time of the high-temperature flue gas.

[0028] Reference Figure 1 and Figure 2 A stop valve is rotatably mounted on the liquid outlet pipe 4, and the liquid outlet pipe 4 is threadedly connected to a liquid pump through a threaded structure. By setting the stop valve on the liquid outlet pipe 4, the treated liquid inside the desulfurization and denitrification pool 121 can be centrally treated.

[0029] Working principle: The boiler flue gas first enters the combustion furnace for combustion treatment, so that SO, CO and NO in the flue gas are burned and converted into carbon dioxide and NOX. The high-temperature flue gas enters the arc plate 13 through the air inlet pipe 3, and enters between the second partition plate 15 and the several-shaped shell 1 through the air inlet grooves 122 opened on both sides of the concave seat 12. The sulfur dioxide and NOX in the high-temperature flue gas can be desulfurized and denitrified by the corrugated filter plate 8, and the corrugated filter plate 8 can slow down the flow rate of the flue gas, so that the effect of desulfurization and denitrification is significantly improved, and energy saving and consumption reduction are effectively achieved. Part of the high-temperature flue gas that has not been desulfurized and denitrified enters between the first partition plate 14. A plurality of vertical pipes 62 connected by a horizontal pipe 61 spray out oxidative absorption liquid of chloric acid for atomized desulfurization and denitrification in opposite directions. The opposite spraying form can form convection of high-temperature flue gas between the first partition plate 14, and slow down the escape of high-temperature flue gas, thereby effectively saving energy and reducing consumption, further desulfurization and denitrification treatment, and forming a liquid form to be retained inside the desulfurization and denitrification pool 121, and the purpose of collection can be achieved through the liquid outlet pipe 4. The flue gas after desulfurization and denitrification treatment enters the exhaust pipe 7, and can be filtered by the adsorption cotton 71 for dust treatment. Then, the high-temperature flue gas after desulfurization and denitrification treatment is subsequently cooled through the exhaust pipe 7, so as to achieve energy-saving and environmental protection treatment.

Claims

1. A boiler flue gas desulfurization and denitrification energy-saving and environmental protection device, characterized in that: The invention comprises: a jigsaw-shaped shell (1), the inner wall of which is fixedly provided with a concave seat (12) and an arc-shaped plate (13), the two side surfaces of the jigsaw-shaped shell (1) are both threadedly installed with U-shaped sealing plates (2), one of the U-shaped sealing plates (2) is fixedly connected with an air inlet pipe (3) and a liquid outlet pipe (4), one end of the air inlet pipe (3) away from the U-shaped sealing plate (2) is threadedly connected to a combustion furnace, a desulfurization and denitrification pool (121) is provided on the concave seat (12), one end of the liquid outlet pipe (4) is connected to the desulfurization and denitrification pool (121), two first baffles (14) and two second baffles (15) are fixedly provided between the jigsaw-shaped shell (1) and the concave seat (12), the second baffles (15) are respectively arranged at the two sides of the two first baffles (14), and the second baffles (15) are respectively arranged at the two sides of the two first baffles (14). 5) Both sides are plug-in-mounted with corrugated filter plates (8), the concave seat (12) is located between the second partition plate (15) and the inner wall of the several-shaped shell (1) and is provided with a plurality of air inlet grooves (122), the upper end of the several-shaped shell (1) is fixedly connected with an exhaust pipe (7), and the exhaust pipe (7) is detachably plug-in-mounted with adsorption cotton (71), the bottom end of the arc plate (13) is threadedly mounted with a dust collecting box (5) through a threaded structure, and the several-shaped shell (1) is installed with an atomizing desulfurization and denitrification mechanism (6), and the atomizing desulfurization and denitrification mechanism (6) includes two transverse tubes (61), the transverse tubes (61) are arranged between the two first partition plates (14), and the transverse tubes (61) are respectively fixedly connected with a plurality of vertical tubes (62), and the vertical tubes (62) extend into the several-shaped shell (1).

2. The boiler flue gas desulfurization and denitrification energy-saving and environmental protection device according to claim 1 is characterized by: A plurality of mounting holes (11) are provided at the bottom end of the U-shaped shell (1), and the U-shaped sealing plate (2) is sealedly connected to the U-shaped shell (1) via a sealing gasket.

3. The boiler flue gas desulfurization and denitrification energy-saving and environmental protection device according to claim 1 is characterized by: Air passages are provided between the second partition plate (15) and the inner wall of the quadrangular shell (1) and between the second partition plate (15) and the first partition plate (14), and the air passages are in a Z-shaped structure and are connected to the exhaust pipe (7).

4. The boiler flue gas desulfurization and denitrification energy-saving and environmental protection device according to claim 1 is characterized by: An activated carbon plate is arranged on the corrugated filter plate (8), the horizontal pipe (61) is connected to a tank body through a pipeline and a pump device, and an oxidizing absorption liquid containing chloric acid is stored in the tank body, and a plurality of atomizing spray holes are arranged on the vertical pipe (62).

5. The boiler flue gas desulfurization and denitrification energy-saving and environmental protection device according to claim 1 is characterized by: A stop valve is rotatably mounted on the liquid outlet pipe (4), and the liquid outlet pipe (4) is threadedly connected to a liquid pump via a threaded structure.

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