Efficient treatment device for chromic acid mist flue gas

Abstract

The utility model relates to an efficient treatment device for chromic acid mist flue gas, which is applied to the field of flue gas treatment and purification and comprises a treatment box, the upper end of the treatment box is fixedly connected with a gas outlet pipe, an inner cavity of the treatment box is fixedly connected with three spraying assemblies and four silk screen modules, and the three spraying assemblies and the four silk screen modules are distributed in a staggered manner. Each silk screen module sequentially comprises a large-diameter silk screen, a medium-diameter silk screen, a small-diameter silk screen and another medium-diameter silk screen from bottom to top, an axial flow fan is arranged in an inner cavity of the treatment box, and the left end and the right end of the axial flow fan are each fixedly connected with two fixing rods. And then the device is combined with the spraying assembly to form trapping of a multi-section structure, and fog drops with different particle sizes are removed through segmented design, so that blockage is prevented, meanwhile, the treatment capacity of the next stage is reduced, the spraying design is optimized, the trapping efficiency is improved, and the effect that emission reaches the standard is achieved.

Description

Technical Field

[0001] The utility model relates to a flue gas treatment device, in particular to an efficient treatment device for chromic acid mist flue gas applied to the field of flue gas treatment and purification. Background Technique

[0002] Chromic acid mist has always been a key issue that needs to be solved in the electroplating industry for collection and emission. Because the chromic acid mist flue gas generated during electroplating fills the workshop and then diffuses into the air outside the workshop, it pollutes the air in the workshop, causing great health hazards to the on-site operators and seriously corroding the equipment. The chromic acid mist diffused into the atmosphere combines with rainwater and seeps into the soil, causing long-term damage to the soil and making crops unable to grow for decades.

[0003] With the more stringent requirements of environmental protection policies and the continuous increase in the intensity of atmospheric environment governance, the emission index requirements for chromic acid mist in the electroplating industry are as follows: the emission standard for existing enterprises is 0.07 mg per cubic meter, and the emission standard for newly built enterprises is 0.05 mg per cubic meter. Currently, the traditional scrubbers with random packing and baffle demisters include venturi and vertical countercurrent types, which have reasonable treatment efficiency for liquid droplets or particulate matters with a size of 8 - 15 microns, but cannot effectively capture liquid droplets with a size of 1 - 3 microns and 3 - 8 microns, resulting in non-compliance of chromic acid mist emissions. Content of the Utility Model

[0004] Aiming at the above-mentioned existing technologies, the technical problem to be solved by the utility model is that the existing treatment device cannot effectively capture liquid droplets with a size of 1 - 3 microns and 3 - 8 microns, resulting in non-compliance of chromic acid mist emissions.

[0005] In order to solve the above problems, the utility model provides a high-efficiency treatment device for chromic acid mist and fume, including a treatment box, the upper end of the treatment box is fixedly connected with an air outlet pipe, the inner cavity of the treatment box is fixedly connected with three spray assemblies and four wire mesh modules, the three spray assemblies and the four wire mesh modules are staggered, the wire mesh modules are coarse-diameter wire mesh, medium-diameter wire mesh, fine-diameter wire mesh and another medium-diameter wire mesh from bottom to top, an axial flow fan is provided in the inner cavity of the treatment box, the left and right ends of the axial flow fan are fixedly connected with two fixing rods, the ends of the two fixing rods that are far away from each other are fixedly connected with the left and right inner walls of the treatment box respectively, an air inlet pipe is fixedly penetrated through the lower right end of the treatment box, and the air inlet pipe is located at the bottom Below the square wire mesh module, the spray assembly includes multiple nozzles, the right end of the nozzle is fixedly connected to the right inner wall of the treatment box, the left end of the nozzle is fixedly passed through the treatment box, the outer surface of the nozzle is fixedly connected with multiple nozzles, the left ends of the multiple nozzles are commonly fixedly connected with a diversion pipe, the lower end of the treatment box is fixedly connected with a water storage tank, the upper end of the water storage tank is fixedly connected with a water pump, the water outlet of the water pump is fixedly connected with a drain pipe, a fixed pipe is fixedly connected between the drain pipe and the diversion pipe, a water inlet pipe is fixedly connected between the water inlet of the water pump and the water storage tank, a circulation pipe is fixedly connected to the inner bottom wall of the treatment box, and the lower end of the circulation pipe is fixedly passed through the treatment box and the water storage tank in sequence and extends to the inner cavity of the water storage tank.

[0006] In the above-mentioned efficient treatment device for chromic acid mist flue gas, wire mesh modules with different wire diameters are arranged and combined, and then combined with spray components to form a multi-segment capture structure. The segmented design removes droplets of different particle sizes to prevent clogging, while reducing the processing capacity of the next stage, optimizing the spray design, and improving the capture efficiency, thereby achieving the effect of meeting emission standards.

[0007] As a further improvement of the present application, a triangular block is fixedly connected to the upper end of the air intake pipe, and a baffle is fixedly connected to the inclined surface of the triangular block.

[0008] As a further improvement of the present application, a guide plate is fixedly connected to the right inner wall of the processing box. The guide plate is located below the air inlet pipe, and the lower end of the guide plate is fixedly connected to the inner bottom wall of the processing box.

[0009] As a further improvement of the present application, a sealing plug is inserted into the upper end of the water tank, a water outlet pipe is fixedly connected to the lower right end of the water tank, and an electric valve is fixedly installed on the outer surface of the water outlet pipe.

[0010] As another improvement of the present application, a stirring assembly is provided in the water tank, and the stirring assembly includes a motor, which is fixedly mounted on the right end of the water tank. The output end of the motor passes through the inner cavity of the water tank and is fixedly connected to a rotating rod, and the left end of the rotating rod is rotatably connected to the left inner wall of the water tank.

[0011] As another improvement supplement of the present application, a plurality of positioning discs are sleeved on the outer surface of the rotating rod. The leftmost positioning disc is fixedly sleeved on the outer surface of the rotating rod, and the other positioning discs are all slidably sleeved on the outer surface of the rotating rod. Springs are fixedly connected between adjacent two positioning discs, and a plurality of hydrophobic holes are drilled on the surface of the positioning discs.

[0012] In summary, in the actual application process, the flue gas enters the inside of the treatment tank through the air inlet pipe. The water pump sends the liquid medicine into the spray pipe through the drain pipe, the fixed pipe and the shunt pipe, and then sprays it onto the surface of the wire mesh module through the spray head, so as to wash the substances in the chromic acid mist flue gas with the medicine. By arranging and combining the wire mesh modules with different wire diameters, and then combining with the spraying component, a multi-stage structure for trapping is formed, and the segmented design removes the droplets with different particle sizes, thereby preventing blockage, reducing the treatment capacity of the subsequent stage at the same time, optimizing the spraying design, improving the trapping efficiency, and further achieving the effect of meeting the emission standards. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 is a schematic structural diagram of the first embodiment of the present application;

[0014] Figure 2 is a schematic structural diagram of the treatment tank of the first embodiment of the present application;

[0015] Figure 3 is a front view of the structure of the first embodiment of the present application;

[0016] Figure 4 is a schematic structural diagram of the spraying component of the first embodiment of the present application;

[0017] Figure 5 is a front view of the structure of the second embodiment of the present application;

[0018] Figure 6 is a schematic structural diagram of the stirring component of the second embodiment of the present application.

[0019] Explanation of the reference numerals in the drawings:

[0020] 1 treatment tank, 2 wire mesh module, 3 spring, 4 axial flow fan, 5 fixed rod, 6 spray pipe, 7 shunt pipe, 8 water storage tank, 9 water pump, 10 drain pipe, 11 fixed pipe, 12 circulation pipe, 13 air inlet pipe, 14 baffle, 15 deflector, 16 motor, 17 rotating rod, 18 positioning disc. SPECIFIC EMBODIMENTS

[0021] The following describes in detail the two embodiments of the present application with reference to the drawings.

[0022] The first embodiment:

[0023] Figure 1 and Figure 2Shown: An efficient treatment device for chromic acid mist flue gas, including a treatment tank 1. An air outlet pipe is fixedly connected to the upper end of the treatment tank 1. Three spraying components and four wire mesh modules 2 are fixedly connected to the inner cavity of the treatment tank 1. The three spraying components and the four wire mesh modules 2 are distributed alternately. The wire mesh modules 2 are, from bottom to top, a thick-diameter wire mesh, a medium-diameter wire mesh, a fine-diameter wire mesh, and another medium-diameter wire mesh. By arranging and combining wire mesh modules 2 with different wire diameters, fog droplets with different particle sizes are removed in segments, improving the defogging efficiency. An axial flow fan 4 is provided in the inner cavity of the treatment tank 1. Those skilled in the art can select an appropriate model of the axial flow fan 4 according to actual needs. For example: HTF. The axial flow fan 4 can suck the treated flue gas into the air inlet pipe for easy discharge. Both the left and right ends of the axial flow fan 4 are fixedly connected with two fixing rods 5. The two ends of the two fixing rods 5 away from each other are respectively fixedly connected to the left and right inner walls of the treatment tank 1. The right lower end of the treatment tank 1 is fixedly penetrated by an air inlet pipe 13. The air inlet pipe 13 is located below the lowermost wire mesh module 2. A sealing plug is inserted into the upper end of the water storage tank 8. A water outlet pipe is fixedly connected to the right lower end of the water storage tank 8. An electric valve is fixedly installed on the outer surface of the water outlet pipe. Those skilled in the art can select an appropriate model of the electric valve according to actual needs. For example: D341X-10C. A guide plate 15 is fixedly connected to the right inner wall of the treatment tank 1. The guide plate 15 is located below the air inlet pipe 13. The lower end of the guide plate 15 is fixedly connected to the inner bottom wall of the treatment tank 1. The guide plate 15 facilitates the flow of the liquid medicine to the circulation pipe 12.

[0024] Figure 3 and Figure 4 Shown: The spraying component includes a plurality of spray pipes 6. The right end of the spray pipe 6 is fixedly connected to the right inner wall of the treatment tank 1. The left end of the spray pipe 6 fixedly penetrates the treatment tank 1. A plurality of spray heads are fixedly connected to the outer surface of the spray pipe 6. The left ends of the plurality of spray pipes 6 are commonly fixedly connected to a shunt pipe 7. The lower end of the treatment tank 1 is fixedly connected to a water storage tank 8. A water pump 9 is fixedly connected to the upper end of the water storage tank 8. Those skilled in the art can select an appropriate model of the water pump 9 according to actual needs. For example: XBD7.6 / 5W. The water outlet of the water pump 9 is fixedly connected to a drain pipe 10. A fixed pipe 11 is fixedly connected between the drain pipe 10 and the shunt pipe 7. An inlet pipe is fixedly connected between the water inlet of the water pump 9 and the water storage tank 8. A circulation pipe 12 is fixedly connected to the inner bottom wall of the treatment tank 1. The lower end of the circulation pipe 12 fixedly penetrates the treatment tank 1 and the water storage tank 8 in sequence and extends into the inner cavity of the water storage tank 8. A triangular block is fixedly connected to the upper end of the air inlet pipe 13. A baffle 14 is fixedly connected to the inclined surface of the triangular block. The baffle 14 can block the air inlet pipe 13, effectively preventing the liquid medicine from flowing into the air inlet pipe 13.

[0025] During use, the flue gas enters the treatment tank 1 through the intake pipe 13. The water pump 9 pumps the liquid medicine into the spray pipe 6 through the drain pipe 10, the fixed pipe 11 and the shunt pipe 7, and then sprays it onto the surface of the wire mesh module 2 through the spray head, so as to perform drug washing on the substances in the chromic acid mist flue gas. By arranging and combining the wire mesh modules 2 with different wire diameters and combining them with the spraying assembly, a multi-stage structure for trapping is formed, and the design of different segments is used to remove droplets with different particle sizes, thereby preventing blockage, reducing the treatment capacity of the subsequent stage at the same time, optimizing the spraying design, improving the trapping efficiency, and thus achieving the effect of meeting the emission standards.

[0026] The second implementation mode:

[0027] Based on the first implementation mode, a stirring assembly is newly added in this implementation mode, and the rest is the same as the first implementation mode.

[0028] Figure 5 and Figure 6 It is shown that a stirring assembly is provided in the water storage tank 8. By means of the stirring assembly, the liquid medicine in the water storage tank 8 is mixed more evenly. When the liquid medicine is sprayed onto the surface of the wire mesh module 2, the mixing effect of the liquid medicine and the chromic acid mist is improved, thereby effectively improving the treatment effect of the chromic acid mist. The stirring assembly includes a motor 16. Those skilled in the art can select a motor 16 with a suitable model according to actual needs. For example: Y2-63M1-2-0.18KW. The motor 16 is fixedly installed at the right end of the water storage tank 8. The output end of the motor 16 penetrates into the inner cavity of the water storage tank 8 and is fixedly connected with a rotating rod 17. The left end of the rotating rod 17 is rotatably connected to the left inner wall of the water storage tank 8. A plurality of positioning disks 18 are sleeved on the outer surface of the rotating rod 17. The leftmost positioning disk 18 is fixedly sleeved on the outer surface of the rotating rod 17, and the other positioning disks 18 are all slidably sleeved on the outer surface of the rotating rod 17. A spring 3 is fixedly connected between two adjacent positioning disks 18. When the spring 3 deforms, it can drive the positioning disk 18 to change its position, thereby improving the stirring efficiency. A plurality of hydrophobic holes are drilled on the surface of the positioning disk 18, and the hydrophobic holes facilitate the flow of water.

[0029] During use, start the motor 16 to drive the rotating rod 17 to rotate, so that the positioning disk 18 rotates, thereby stirring the liquid medicine in the water storage tank 8. While the positioning disk 18 rotates, the fluctuation of the water flow drives the spring 3 to deform, thereby driving the plurality of positioning disks 18 slidably connected to the rotating rod 17 to change their positions, thereby improving the stirring efficiency.

[0030] Combined with the current actual needs, the above implementation modes adopted in this application, the scope of protection is not limited to this. Within the knowledge scope of those skilled in the art, various changes made without departing from the concept of this application still fall within the protection scope of this utility model.

Claims

1. An efficient treatment device for chromic acid mist and fume, comprising a treatment box (1), characterized in that: The upper end of the processing box (1) is fixedly connected to an air outlet pipe, and the inner cavity of the processing box (1) is fixedly connected to three spray assemblies and four wire mesh modules (2), the three spray assemblies and the four wire mesh modules (2) are staggered, and the wire mesh modules (2) are, from bottom to top, a coarse-diameter wire mesh, a medium-diameter wire mesh, a fine-diameter wire mesh and another medium-diameter wire mesh. The inner cavity of the processing box (1) is provided with an axial flow fan (4), and the left and right ends of the axial flow fan (4) are fixedly connected to two fixing rods (5), and the ends of the two fixing rods (5) that are far away from each other are fixedly connected to the left and right inner walls of the processing box (1), respectively. The lower right end of the processing box (1) is fixedly penetrated by an air intake pipe (13), and the air intake pipe (13) is located below the lowest wire mesh module (2); The spray assembly comprises a plurality of spray pipes (6), the right end of the spray pipe (6) being fixedly connected to the right inner wall of the treatment box (1), the left end of the spray pipe (6) being fixedly passed through the treatment box (1), the outer surface of the spray pipe (6) being fixedly connected to a plurality of spray heads, the left ends of the plurality of spray pipes (6) being fixedly connected to a diversion pipe (7) in common, the lower end of the treatment box (1) being fixedly connected to a water storage tank (8), the upper end of the water storage tank (8) being fixedly connected to a water pump (9), the water outlet of the water pump (9) being fixedly connected to a drainage pipe (10), a fixed pipe (11) being fixedly connected between the drainage pipe (10) and the diversion pipe (7), a water inlet pipe being fixedly connected between the water inlet of the water pump (9) and the water storage tank (8), the inner bottom wall of the treatment box (1) being fixedly connected to a circulation pipe (12), the lower end of the circulation pipe (12) being fixedly passed through the treatment box (1) and the water storage tank (8) in sequence and extending to the inner cavity of the water storage tank (8).

2. The high-efficiency treatment device for chromic acid mist and fume according to claim 1 is characterized in that: The upper end of the air intake pipe (13) is fixedly connected to a triangular block, and the inclined surface of the triangular block is fixedly connected to a baffle (14).

3. The high-efficiency treatment device for chromic acid mist and fume according to claim 1 is characterized in that: A guide plate (15) is fixedly connected to the right inner wall of the processing box (1); the guide plate (15) is located below the air inlet pipe (13); and the lower end of the guide plate (15) is fixedly connected to the inner bottom wall of the processing box (1).

4. The high-efficiency treatment device for chromic acid mist and fume according to claim 1 is characterized in that: A sealing plug is inserted at the upper end of the water storage tank (8), a water outlet pipe is fixedly connected to the lower right end of the water storage tank (8), and an electric valve is fixedly installed on the outer surface of the water outlet pipe.

5. The high-efficiency treatment device for chromic acid mist and fume according to claim 1 is characterized in that: A stirring assembly is provided in the water tank (8), the stirring assembly comprising a motor (16), the motor (16) being fixedly mounted at the right end of the water tank (8), the output end of the motor (16) penetrating into the inner cavity of the water tank (8) and being fixedly connected to a rotating rod (17), the left end of the rotating rod (17) being rotatably connected to the left inner wall of the water tank (8).

6. The high-efficiency treatment device for chromic acid mist and fume according to claim 5 is characterized in that: The outer surface of the rotating rod (17) is sleeved with a plurality of positioning plates (18), the leftmost positioning plate (18) is fixedly sleeved on the outer surface of the rotating rod (17), and the other positioning plates (18) are slidably sleeved on the outer surface of the rotating rod (17), and a spring (3) is fixedly connected between two adjacent positioning plates (18), and a plurality of water-repellent holes are drilled on the surface of the positioning plates (18).

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