Desulfurization and denitrification treatment equipment

Abstract

The utility model discloses desulfurization and denitrification treatment equipment, which belongs to the technical field of desulfurization and denitrification treatment and comprises a desulfurization tower, a first fan is mounted on one side of the desulfurization tower, a spraying structure is arranged at the upper end in the desulfurization tower, the lower end of a protective cover is connected with a circulating pump water pipe, and a rotating structure is mounted at the lower end in the desulfurization tower. According to the waste gas desulfurization and denitrification device, the heat collection assembly is arranged, cold water enters the spiral water pipes in the first mounting box and the second mounting box, and the heat conduction plate and the heat conduction cotton conduct heat generated during the desulfurization and denitrification reaction of waste gas, so that heat exchange with the cold water in the spiral water pipes can be carried out, and the reaction heat can be conveniently utilized; the filtering assembly is arranged, the filtering cylinder is inserted and fixed to the outer side of the circulating pump water pipe through the positioning insertion rod, a fine filtering net in the filtering cylinder can filter a solution, and the phenomenon that calcium sulfite and calcium sulfate paste enter the circulating pump water pipe along with the solution to block the spraying structure is avoided.

Description

Technical Field

[0001] This utility model belongs to the field of desulfurization and denitrification treatment technology, specifically relating to a desulfurization and denitrification treatment device. Background Technology

[0002] Flue gas desulfurization and denitrification technology is a boiler flue gas purification technology applied in the chemical industry, which generates nitrogen oxides and sulfur oxides. Nitrogen oxides and sulfur oxides are among the main sources of air pollution. Therefore, the application of this technology has many benefits for environmental air purification. Currently known flue gas desulfurization and denitrification technologies include PAFP, ACFP, pyrolusite method, electron beam ammonia method, pulsed corona method, gypsum wet method, catalytic oxidation method, and microbial degradation method.

[0003] Chinese patent application number 202020040773.3 discloses a flue gas desulfurization and denitrification treatment device; it can effectively prevent the accumulation of dirt on the inner wall of the desulfurization tower, while extending the residence time of flue gas in the first cavity, and allowing gases such as sulfur dioxide in the flue gas to fully contact with lime water, resulting in better desulfurization effect; it includes a desulfurization tower, a catalytic oxidation box, an alkaline absorption box, a circulating pump, a spray pipe group, a three-way pipe, a first fan, a first connecting pipe and a second fan. A discharge pipe is provided at the bottom of the desulfurization tower, a catalyst reaction bed is provided in the second cavity, an ozone inlet pipe is provided at the right end of the catalytic oxidation box, and alkaline solution is provided in the third cavity; it also includes a reduction motor, a steering gearbox, a first rotating shaft, a second rotating shaft, a third rotating shaft and a turntable. Multiple sets of connecting rods are provided on the second rotating shaft, and scrapers are fixedly provided on the ends of the multiple sets of connecting rods near the inner wall of the first cavity. Multiple sets of evenly distributed fan blades are provided on the turntable.

[0004] In the aforementioned patents, 1. when the desulfurization tower, catalytic oxidation box, and alkaline absorption box treat flue gas, the chemical reaction produced will release heat, and the generated heat will diffuse into the air, causing a waste of resources; 2. when lime water is reused, calcium sulfite and calcium sulfate paste may enter the pipeline, which needs to be filtered. Utility Model Content

[0005] To address the problems mentioned in the background section, this invention provides a desulfurization and denitrification treatment device, which features convenient heat collection and filtration.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a desulfurization and denitrification treatment device, including a desulfurization tower, a first fan installed on one side of the desulfurization tower, a spray structure installed at the upper end of the interior of the desulfurization tower, a circulating pump water pipe connected to the lower end of the protective cover, a rotating structure installed at the lower end of the interior of the desulfurization tower, an alkaline absorption tank installed on one side of the desulfurization tower, a catalytic oxidation tank installed at the upper end of the alkaline absorption tank, a denitrification structure installed between the catalytic oxidation tank and the alkaline absorption tank, a water vapor absorption structure installed on one side of the catalytic oxidation tank, a first connecting pipe connecting the desulfurization tower and the water vapor absorption structure, a heat collection component installed on the outside of the desulfurization tower, the catalytic oxidation tank and the alkaline absorption tank, and a filter component installed inside the desulfurization tower at a position corresponding to the circulating pump water pipe.

[0007] Preferably, the heat collection assembly includes an inlet pipe, a connecting pipe, a second mounting box, a first mounting box, an outlet pipe, and a heat exchange structure. The first mounting box is located outside the desulfurization tower, and the second mounting box is located outside the catalytic oxidation box and the alkaline absorption box. The heat exchange structure is installed inside the second mounting box and the first mounting box. The inlet pipe is connected to the upper end of one side of the first mounting box, and the outlet pipe is connected to the lower end of one side of the second mounting box. A connecting pipe connects the second mounting box and the first mounting box.

[0008] Preferably, the heat exchange structure includes thermally conductive cotton, a thermally conductive plate, and a spiral water pipe, wherein the spiral water pipe is wound inside the second mounting box and the first mounting box, the thermally conductive plate is installed on the inner wall of the second mounting box and the first mounting box, and the interior of the second mounting box and the first mounting box is filled with thermally conductive cotton.

[0009] Preferably, the heat collection assembly further includes a protective cover and a vacuum insulation plate, wherein the second mounting box and the first mounting box are provided with vacuum insulation plates on their outer sides, and the protective cover is attached to the outer side of the vacuum insulation plate.

[0010] Preferably, the filter assembly includes a filter cylinder, a fine filter screen, a positioning rod, and a mounting plate. The filter cylinder is installed inside the desulfurization tower and outside the circulating pump water pipe. The fine filter screen is connected inside the filter cylinder. A positioning rod is fixed to one side of the filter cylinder, and a mounting plate is fixed to the upper end of the filter cylinder.

[0011] Preferably, the filter assembly further includes an acid and alkali resistant layer and a flow guide tube, wherein the flow guide tube is disposed inside the filter tube and between the filter screen and the circulating pump water pipe, and the surface of the flow guide tube is provided with an acid and alkali resistant layer.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] 1. This utility model is equipped with a heat collection component, which allows cold water to enter the spiral water pipes in the first and second installation boxes. The heat-conducting plate and heat-conducting cotton conduct the heat generated during the desulfurization and denitrification reaction of the waste gas, thereby exchanging heat with the cold water in the spiral water pipes, and making it convenient to utilize the heat of reaction.

[0014] 2. This utility model is equipped with a filter assembly. The filter cylinder is inserted and fixed to the outside of the circulating pump water pipe through a positioning rod. The fine filter screen inside can filter the solution and prevent calcium sulfite and calcium sulfate paste from entering the circulating pump water pipe with the solution and clogging the spray structure. Attached Figure Description

[0015] Figure 1 This is a perspective view of the present utility model;

[0016] Figure 2 This is the front view of the present invention;

[0017] Figure 3 This is a perspective view of the heat collection component of this utility model;

[0018] Figure 4 This is a perspective view of the filter assembly of this utility model;

[0019] In the diagram: 1. Desulfurization tower; 2. Heat collection assembly; 21. Protective cover; 22. Water inlet pipe; 23. Connecting pipe; 24. Second mounting box; 25. First mounting box; 26. Water outlet pipe; 27. Vacuum insulation plate; 28. Heat exchange structure; 281. Thermal conductive cotton; 282. Thermal conductive plate; 283. Spiral water pipe; 3. First fan; 4. Rotating structure; 5. Catalytic oxidation box; 6. Water vapor absorption structure; 7. First connecting pipe; 8. Filter assembly; 81. Filter cylinder; 82. Filter mesh; 83. Acid and alkali resistant layer; 84. Flow guide cylinder; 85. Positioning rod; 86. Mounting plate; 9. Circulating pump water pipe; 10. Denitrification structure; 11. Alkali absorption box; 12. Spray structure. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] Example 1

[0022] Please see Figure 1-4The present invention provides the following technical solution: a desulfurization and denitrification treatment device, including a desulfurization tower 1, a first fan 3 installed on one side of the desulfurization tower 1, a spray structure 12 installed at the upper end of the interior of the desulfurization tower 1, a circulating pump water pipe 9 connected to the lower end of the protective cover 21, a rotating structure 4 installed at the lower end of the interior of the desulfurization tower 1, an alkaline absorption tank 11 installed on one side of the desulfurization tower 1, a catalytic oxidation tank 5 installed at the upper end of the alkaline absorption tank 11, a denitrification structure 10 installed between the catalytic oxidation tank 5 and the alkaline absorption tank 11, a water vapor absorption structure 6 installed on one side of the catalytic oxidation tank 5, a first connecting pipe 7 connecting the desulfurization tower 1 and the water vapor absorption structure 6, a heat collection component 2 installed on the outside of the desulfurization tower 1, the catalytic oxidation tank 5 and the alkaline absorption tank 11, and a filter component 8 installed inside the desulfurization tower 1 at a position corresponding to the circulating pump water pipe 9.

[0023] Specifically, the heat collection assembly 2 includes an inlet pipe 22, a connecting pipe 23, a second mounting box 24, a first mounting box 25, an outlet pipe 26, and a heat exchange structure 28. The first mounting box 25 is located outside the desulfurization tower 1, and the second mounting box 24 is located outside the catalytic oxidation tank 5 and the alkaline absorption tank 11. The heat exchange structure 28 is installed inside both the second mounting box 24 and the first mounting box 25. The inlet pipe 22 is connected to the upper end of one side of the first mounting box 25, and the outlet pipe 26 is connected to the lower end of one side of the second mounting box 24. A connecting pipe 23 connects the second mounting box 24 and the first mounting box 25.

[0024] By adopting the above technical solution, the first installation box 25 is installed outside the desulfurization tower 1, and the second installation box 24 is installed outside the catalytic oxidation box 5 and the alkaline absorption box 11. Cold water enters the heat exchange structure 28 in the first installation box 25 through the inlet pipe 22, and then enters the heat exchange structure 28 in the second installation box 24 through the connecting pipe 23. Finally, it is discharged through the outlet pipe 26. This can effectively absorb the heat generated during the desulfurization and denitrification reaction of the waste gas, and effectively save resources.

[0025] Specifically, the heat exchange structure 28 includes thermally conductive cotton 281, a thermally conductive plate 282, and a spiral water pipe 283. The spiral water pipe 283 is wound inside the second mounting box 24 and the first mounting box 25. The thermally conductive plate 282 is installed on the inner walls of the second mounting box 24 and the first mounting box 25. The interiors of the second mounting box 24 and the first mounting box 25 are filled with thermally conductive cotton 281.

[0026] By adopting the above technical solution, the heat-conducting cotton 281 and the heat-conducting plate 282 work together to facilitate heat transfer, thereby enabling the cold water in the spiral water pipe 283 to easily exchange heat with the heat in the desulfurization tower 1, the catalytic oxidation box 5 and the alkaline absorption box 11.

[0027] Specifically, the heat collection assembly 2 also includes a protective cover 21 and a vacuum insulation plate 27. The vacuum insulation plate 27 is installed on the outer side of the second mounting box 24 and the first mounting box 25, and the protective cover 21 is attached to the outer side of the vacuum insulation plate 27.

[0028] By adopting the above technical solution, the vacuum insulation plate 27 can achieve the effect of heat insulation and prevent heat loss, and the protective cover 21 can protect the insulation plate.

[0029] In this embodiment, the flue gas is pressurized by the first fan 3 and blown into the desulfurization tower 1. The spray structure 12 and the rotating structure 4 are activated to desulfurize the exhaust gas. The treated flue gas then enters the water vapor absorption structure 6 through the first connecting pipe 7 for water vapor removal, and then enters the catalytic oxidation tank 5 for oxidation. The denitrification structure 10 in the alkaline absorption tank 11 denitrifies the exhaust gas, thus preventing air pollution during flue gas emission. The first installation box 25 is installed outside the desulfurization tower 1, and the second installation box 24 is installed outside the catalytic oxidation tank 5 and the alkaline absorption tank 11. Cold water is supplied through the inlet pipe 22. The water enters the heat exchange structure 28 in the first installation box 25, then enters the heat exchange structure 28 in the second installation box 24 through the connecting pipe 23, and finally is discharged through the outlet pipe 26. It can effectively absorb the heat generated during the desulfurization and denitrification reaction of the exhaust gas, effectively saving resources. The heat-conducting cotton 281 and the heat-conducting plate 282 work together to facilitate heat transfer, so that the cold water in the spiral water pipe 283 can easily exchange heat with the heat in the desulfurization tower 1, the catalytic oxidation box 5 and the alkaline absorption box 11. The vacuum insulation plate 27 can play a heat insulation role to prevent heat loss, and the protective cover 21 can protect the insulation plate.

[0030] Example 2

[0031] The difference between this embodiment and Embodiment 1 is that the filter assembly 8 includes a filter cylinder 81, a fine filter screen 82, a positioning rod 85, and a mounting plate 86. The filter cylinder 81 is located inside the desulfurization tower 1 and outside the circulating pump water pipe 9. The fine filter screen 82 is connected inside the filter cylinder 81. A positioning rod 85 is fixed to one side of the filter cylinder 81, and a mounting plate 86 is fixed to the upper end of the filter cylinder 81.

[0032] By adopting the above technical solution, the filter cylinder 81 is inserted into the inner surface of the desulfurization tower 1 by the positioning rod 85, and then fixed by the mounting plate 86. The filter screen 82 can filter the solution and prevent calcium sulfite and calcium sulfate paste from entering the circulating pump water pipe 9 with the solution and causing blockage of the spray structure 12.

[0033] Specifically, the filter assembly 8 also includes an acid and alkali resistant layer 83 and a flow guide tube 84. The flow guide tube 84 is disposed inside the filter tube 81 and between the filter screen 82 and the circulating pump water pipe 9. The surface of the flow guide tube 84 is provided with an acid and alkali resistant layer 83.

[0034] By adopting the above technical solution, the guide tube 84 facilitates the flow of the solution, and the acid and alkali resistant layer 83 can play a protective role.

[0035] In this embodiment, the filter cylinder 81 is inserted into the inner surface of the desulfurization tower 1 by the positioning rod 85, and then fixed by the mounting plate 86. The fine filter screen 82 can filter the solution and prevent calcium sulfite and calcium sulfate paste from entering the circulating pump water pipe 9 with the solution and causing blockage of the spray structure 12. The guide tube 84 facilitates the flow of the solution, and the acid and alkali resistant layer 83 can play a protective role.

[0036] The structure and working principle of the first fan 3, the rotating structure 4 consisting of a geared motor, a steering gearbox, a first rotating shaft, a second rotating shaft, a third rotating shaft, a turntable, a first connecting support, a connecting rod, a scraper, a bearing seat, a second connecting support, a spiral conveying blade, a conical protective cover, and a fan blade in this utility model, the water vapor absorption structure 6 consisting of a water vapor absorption box, a hydraulic cylinder, a moving plate, a water vapor absorption sponge layer, and through holes, the denitrification structure 10 consisting of a second fan, a catalyst reaction bed, an ozone inlet pipe, a gas equalization pipe group, an outlet pipe, a conical cover, and an outlet hole, and the spray structure 12 consisting of a circulating pump, a spray pipe group, and a three-way pipe are described in Chinese Patent Application No. 202020040773.The flue gas desulfurization and denitrification treatment equipment disclosed in 3 has the following working principle: the first fan 3 converts rotational mechanical energy into gas pressure energy and kinetic energy, and transports the gas. The rotating structure 4 works by a reduction motor driving the first rotating shaft to rotate, which, through the transmission of the steering gearbox, causes the second rotating shaft to rotate, thereby causing the connecting rod to drive the scraper to rotate. The scraper scrapes off the calcium sulfite and calcium sulfate adhering to the inner wall of the first cavity, thereby reducing the adhesion and solidification of calcium sulfate and calcium sulfite on the inner wall of the first cavity to form scale, which provides a certain degree of protection for the desulfurization tower 1. The steering gearbox drives the third rotating shaft, which in turn drives the turntable and fan blades to rotate. The fan blades agitate the first... The gas inside the first cavity forms a swirling flow, causing the exhaust gas entering the first cavity to spiral upwards, prolonging the residence time of the flue gas in the first cavity, and allowing the exhaust gas to fully contact the lime water sprayed from the spray pipe assembly, thereby fully absorbing sulfur dioxide and other substances in the exhaust gas, resulting in better desulfurization. When not unloading, the reduction motor rotates forward, and after being driven by the steering gearbox, the second shaft rotates in reverse. This causes the calcium sulfite and calcium sulfate paste accumulated in the discharge pipe to be lifted by the spiral conveyor blades, preventing the calcium sulfite and calcium sulfate paste from accumulating and solidifying in the discharge pipe and clogging it. Conversely, the calcium sulfite and calcium sulfate paste can be conveyed and discharged. Water vapor absorption structure The working principle of structure 6 is that the water vapor absorption sponge in the water vapor absorption box adsorbs water vapor in the exhaust gas. After the water vapor absorption sponge has adsorbed a certain amount of water vapor, the hydraulic cylinder is activated, causing the output end of the hydraulic cylinder to extend, thereby causing the moving plate to move upward. The moving plate squeezes the water vapor absorption sponge layer, causing the water inside the water vapor absorption sponge layer to be squeezed out. After the hydraulic cylinder is reset, the water vapor absorption sponge layer can absorb water vapor again. The working principle of denitrification structure 10 is that a certain amount of ozone is blown in through the ozone inlet pipe, causing gases such as nitrogen monoxide in the flue gas to be oxidized to nitrogen dioxide on the catalytic reaction bed. The oxidized nitrogen dioxide and other gases enter the alkaline absorption tank 11 to react and produce nitrates. The nitrates can be absorbed through the gas equalization pipe group. The gas injected into the third cavity is evenly dispersed, ensuring sufficient contact between nitrogen dioxide and the alkaline solution. Simultaneously, the conical hood causes the gas exiting through the outlet to first move downwards into the lower part of the third cavity and then back upwards, prolonging the residence time of nitrogen dioxide and other gases in the alkaline solution. This enhances the absorption effect of nitrogen dioxide and other gases. The spray structure 12 works by introducing lime water into the right end of the three-way pipe, which is then sprayed into the first cavity through the spray pipe assembly. The lime water falling into the first cavity is then pressurized by a circulating pump and sprayed out again through the spray pipe assembly, causing the sulfur dioxide in the flue gas to react with the lime water to form calcium sulfite and calcium sulfate, which are insoluble in water.

[0037] The working principle and usage process of this utility model are as follows: When in use, the flue gas is pressurized by the first fan 3 and blown into the desulfurization tower 1. The spray structure 12 and rotating structure 4 are activated to desulfurize the waste gas. The treated flue gas then enters the water vapor absorption structure 6 through the first connecting pipe 7 for water vapor removal, and then enters the catalytic oxidation tank 5 for oxidation treatment. The denitrification structure 10 in the alkaline absorption tank 11 can denitrify the waste gas, thus preventing air pollution during flue gas emission. The first installation box 25 is installed outside the desulfurization tower 1, and the second installation box 24 is installed outside the catalytic oxidation tank 5 and the alkaline absorption tank 11. Cold water enters the heat exchange structure 28 in the first installation box 25 through the inlet pipe 22, then enters the heat exchange structure 28 in the second installation box 24 through the connecting pipe 23, and finally exits through the outlet water... The pipe 26 discharges heat, which can effectively absorb the heat generated during the desulfurization and denitrification reaction of the waste gas, thus saving resources. The heat-conducting cotton 281 and the heat-conducting plate 282 work together to facilitate heat transfer, so that the cold water in the spiral water pipe 283 can easily exchange heat with the heat in the desulfurization tower 1, the catalytic oxidation box 5 and the alkaline absorption box 11. The vacuum insulation plate 27 can provide heat insulation and prevent heat loss. The protective cover 21 can protect the insulation plate. The filter cylinder 81 is inserted into the inner surface of the desulfurization tower 1 by the positioning rod 85 and then fixed by the mounting plate 86. The fine filter screen 82 can filter the solution and prevent calcium sulfite and calcium sulfate paste from entering the circulating pump water pipe 9 with the solution and clogging the spray structure 12. The guide tube 84 facilitates the flow of the solution, and the acid and alkali resistant layer 83 can provide protection.

[0038] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A desulfurization and denitrification treatment device, comprising a desulfurization tower (1), wherein a first fan (3) is installed on one side of the desulfurization tower (1), a spray structure (12) is provided at the upper end of the interior of the desulfurization tower (1), a circulating pump water pipe (9) is connected to the lower end of a protective cover (21), a rotating structure (4) is installed at the lower end of the interior of the desulfurization tower (1), an alkaline absorption tank (11) is provided on one side of the desulfurization tower (1), a catalytic oxidation tank (5) is installed at the upper end of the alkaline absorption tank (11), a denitrification structure (10) is provided between the catalytic oxidation tank (5) and the alkaline absorption tank (11), a water vapor absorption structure (6) is provided on one side of the catalytic oxidation tank (5), and a first connecting pipe (7) is connected between the desulfurization tower (1) and the water vapor absorption structure (6), characterized in that: The desulfurization tower (1), the catalytic oxidation box (5) and the lye absorption box (11) are provided with heat collection assemblies (2) outside, and the desulfurization tower (1) is provided with a filter assembly (8) inside and at a position corresponding to the circulating pump water pipe (9).

2. The desulfurization and denitrification treatment apparatus according to claim 1, characterized by: The heat collection assembly (2) comprises a water inlet pipe (22), a connecting pipe (23), a second mounting box (24), a first mounting box (25), a water outlet pipe (26) and a heat exchange structure (28), wherein the desulfurization tower (1) is provided with the first mounting box (25) outside, the catalytic oxidation box (5) and the lye absorption box (11) are provided with the second mounting box (24) outside, the second mounting box (24) and the first mounting box (25) are internally provided with the heat exchange structure (28), the first mounting box (25) is connected with the water inlet pipe (22) on one side and at an upper end, the second mounting box (24) is connected with the water outlet pipe (26) on one side and at a lower end, and the second mounting box (24) and the first mounting box (25) are connected with the connecting pipe (23).

3. The desulfurization and denitrification treatment apparatus according to claim 2, characterized by: The heat exchange structure (28) comprises heat-conducting cotton (281), heat-conducting plates (282) and spiral water pipes (283), wherein the second mounting box (24) and the first mounting box (25) are internally wound with the spiral water pipes (283), the second mounting box (24) and the first mounting box (25) are internally provided with the heat-conducting plates (282), and the second mounting box (24) and the first mounting box (25) are internally filled with the heat-conducting cotton (281).

4. The desulfurization and denitrification treatment apparatus according to claim 2, characterized by: The heat collection assembly (2) further comprises a protective cover (21) and vacuum heat insulation plates (27), wherein the second mounting box (24) and the first mounting box (25) are provided with the vacuum heat insulation plates (27) outside, and the vacuum heat insulation plates (27) are externally pasted with the protective cover (21).

5. The desulfurization and denitrification treatment device according to claim 1, characterized by: The filter assembly (8) comprises a filter cylinder (81), a filter fine mesh (82), a positioning plug rod (85) and a mounting plate (86), wherein the desulfurization tower (1) is provided with the filter cylinder (81) inside and outside the circulating pump water pipe (9), the filter cylinder (81) is internally connected with the filter fine mesh (82), the filter cylinder (81) is fixed with the positioning plug rod (85) on one side, and the filter cylinder (81) is fixed with the mounting plate (86) at an upper end.

6. The desulfurization and denitrification treatment apparatus according to claim 5, characterized by: The filter assembly (8) further comprises an acid-alkali resistant layer (83) and a flow guide cylinder (84), wherein the filter cylinder (81) is provided with the flow guide cylinder (84) inside and between the filter fine mesh (82) and the circulating pump water pipe (9), and the flow guide cylinder (84) is provided with the acid-alkali resistant layer (83) on a surface.

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