Alkali residue recycling device
By designing an alkali slag recycling device, using an absorption tower and a spray tower to absorb hydrogen sulfide and generate sodium hydrosulfide, the problem of high treatment cost of alkaline liquids in the prior art is solved, and the recovery of hydrogen sulfide and the resource utilization of hazardous waste are realized.
Patent Information
- Application Number
- CN202422249885.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-13
- Publication Date
- 2025-07-04
- Estimated Expiration
- 2034-09-13
AI Technical Summary
In the prior art, after the alkaline drug solution in the dosing device is used to remove the hydrogen sulfide component in the waste gas, the alkaline drug solution after absorbing the hydrogen sulfide needs to be treated according to hazardous waste, which is relatively costly.
A alkali residue recycling device is designed, and a combination of an absorption tower and a spray tower is used to absorb hydrogen sulfide using 32% NAOH solution to produce sodium hydrosulfide, and further absorb it in the spray tower. When the concentration reaches more than 30%, solid sodium hydrosulfide is produced as raw material.
Effectively recover hydrogen sulfide, reduce exhaust odor, reduce the difficulty and cost of sewage treatment, and convert hazardous waste product alkali slag into product raw materials.
Smart Images
Figure CN223055396U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of waste gas treatment, in particular to a device for recycling alkali residue. Background Art
[0002] Hydrogen sulfide is a gas often encountered in industrial production. It has a very unpleasant smell, similar to that of rotten eggs in our daily life, and is highly toxic. Hydrogen sulfide is a flammable gas. If it meets air or oxygen and reaches a certain proportion, it will explode, which is very dangerous. Since hydrogen sulfide is soluble in water, for the treatment of hydrogen sulfide waste gas, the common method is to use an acid mist purification tower, and use the alkaline liquid medicine in the dosing device to remove the hydrogen sulfide component in the waste gas, and then discharge it into the atmosphere. The alkaline liquid medicine after absorbing hydrogen sulfide needs to be treated as hazardous waste, but this treatment cost is relatively high. In view of the above problems, the inventor proposes a device for recycling alkali residue to solve the above problems. Content of the Utility Model
[0003] In order to solve the problem that the alkaline liquid medicine in the dosing device is used to remove the hydrogen sulfide component in the waste gas, and the alkaline liquid medicine after absorbing hydrogen sulfide needs to be treated as hazardous waste, with a relatively high cost; the purpose of the utility model is to provide a device for recycling alkali residue.
[0004] To solve the above technical problems, the utility model adopts the following technical scheme: A device for recycling alkali residue, including an absorption tower, a spray tower is arranged on one side of the absorption tower, a feed pipe is fixedly connected through the lower part of the side wall of the absorption tower, a liquid outlet pipe is fixedly connected through the bottom surface of the absorption tower, a pump body is arranged between the absorption tower and the spray tower, the pipe orifice of the liquid outlet pipe is fixedly connected with the input end of the pump body, the output end of the pump body is fixedly connected with a communicating pipe, a branch pipe is fixedly connected through the side wall of the communicating pipe, the output end of the branch pipe extends into the spray tower, the output end of the side wall of the communicating pipe is fixedly connected with a horizontal pipe, the output end of the horizontal pipe is fixedly connected with a spray head, the spray head is located inside the absorption tower, and a filter cylinder is fixedly connected through the middle part of the top surface of the absorption tower.
[0005] Preferably, NAOH solution is arranged inside the absorption tower, and the concentration of the NAOH solution is 32%. The tail gas containing hydrogen sulfide and the tail gas volatilized from the sewage treatment plant containing hydrogen sulfide enter the absorption tower through the feed pipe. In the absorption tower, hydrogen sulfide can be absorbed by 32% NAOH solution. As the alkaline liquid circulates to absorb hydrogen sulfide, the concentration of sodium hydrosulfide gradually increases. When it rises above 18%, it is sent into the spray tower. In the spray tower, the remaining NAOH continues to absorb hydrogen sulfide in the waste gas of the solid sodium hydrosulfide device, and the concentration of the sodium hydrosulfide solution further increases. When it rises above 30%, it enters the solid sodium hydrosulfide device as a raw material to produce solid sodium hydrosulfide.
[0006] Preferably, a first leg is fixedly connected to the lower part of the side wall of the absorption tower, and a second leg is fixedly connected to the lower part of the side wall of the spray tower. The first leg is used to support the absorption tower, and the second leg is used to support the spray tower. A second flow valve is arranged on the side wall of the branch pipe, and a first flow valve is arranged on the side wall of the connecting pipe. A flow stabilizer plate is fixedly connected to the inner side wall of the absorption tower. The spray head is located directly above the outlet of the flow stabilizer plate. When the pump body is started, the alkali liquid in the absorption tower can flow into the connecting pipe from the liquid outlet pipe. Then, the first flow valve is opened and the second flow valve is closed, so that the connecting pipe is unblocked and the branch pipe is closed. At this time, the alkali liquid is pumped to the horizontal pipe at the top of the tower and can be circulated and sprayed through the spray head to react with hydrogen sulfide in the tower gas to generate sodium hydrosulfide. The arranged flow stabilizer plate is used to reduce the gas flow rate, so as to extend the reaction time and improve the reaction effect.
[0007] Preferably, a base is arranged on the side wall of the pump body, and the pump body is installed through the base. A filter element is arranged inside the filter cylinder. A plug is detachably arranged at the mouth of the filter cylinder, and honeycomb holes are arranged through the top surface of the plug. A convex plate is fixedly connected to the outer side wall of the filter cylinder, a vertical rod is fixedly connected to the top surface of the convex plate, and a cover is fixedly connected to the top surface of the vertical rod and corresponds to the filter cylinder. The gas after reaction will enter the filter cylinder, and the gas can be filtered through the filter element to remove harmful substances and avoid polluting the air. The arranged plug is used to press the filter element, and the filtered gas can be discharged externally through the honeycomb holes. The arranged cover is used to protect the filter cylinder and prevent rainwater from pouring into the filter cylinder.
[0008] Compared with the prior art, the beneficial effects of the present utility model are as follows: it can effectively recover hydrogen sulfide, reduce the odor of the tail gas, reduce the difficulty and cost of sewage treatment, and can also recycle the hazardous waste product alkali residue and turn it into product raw materials. BRIEF DESCRIPTION OF THE DRAWINGS
[0009] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.
[0010] Figure 1 It is a schematic diagram of the overall structure of the present utility model.
[0011] Figure 2 It is a schematic diagram of the internal structure of the absorption tower of the present utility model.
[0012] Figure 3 It is an enlarged view of part A of the present utility model.
[0013] Figure 4 This is an enlarged view of part B of the present utility model.
[0014] In the figure: 1, absorption tower; 2, first leg; 3, feed pipe; 4, liquid outlet pipe; 5, pump body; 6, base; 7, connecting pipe; 8, first flow valve; 9, horizontal pipe; 10, spray head; 11, branch pipe; 12, second flow valve; 13, spray tower; 14, second leg; 15, flow stabilizer plate; 16, filter cartridge; 17, filter element; 18, plug; 19, honeycomb holes; 20, convex plate; 21, vertical rod; 22, retaining cover. Specific embodiments
[0015] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model.
[0016] Embodiment: As Figures 1-4 shown, the present utility model provides an alkali residue recycling device, including an absorption tower 1. A spray tower 13 is arranged on one side of the absorption tower 1. A feed pipe 3 is fixedly connected through the lower part of the side wall of the absorption tower 1. A liquid outlet pipe 4 is fixedly connected through the bottom surface of the absorption tower 1. A pump body 5 is arranged between the absorption tower 1 and the spray tower 13. The pipe orifice of the liquid outlet pipe 4 is fixedly connected to the input end of the pump body 5. The output end of the pump body 5 is fixedly connected to a connecting pipe 7. A branch pipe 11 is fixedly connected through the side wall of the connecting pipe 7. The output end of the branch pipe 11 extends into the spray tower 13. The output end of the side wall of the connecting pipe 7 is fixedly connected to a horizontal pipe 9. The output end of the horizontal pipe 9 is fixedly connected to a spray head 10. The spray head 10 is located inside the absorption tower 1. A filter cartridge 16 is fixedly connected through the middle part of the top surface of the absorption tower 1.
[0017] The interior of the absorption tower 1 is provided with a NAOH solution, and the concentration of the NAOH solution is 32%.
[0018] By adopting the above technical solution, the tail gas containing hydrogen sulfide and the tail gas volatilized from the sewage treatment plant containing hydrogen sulfide enter the absorption tower 1 through the feed pipe 3. In the absorption tower 1, hydrogen sulfide can be absorbed by the 32% NAOH solution. As the alkaline solution circulates to absorb hydrogen sulfide, the concentration of sodium hydrosulfide gradually increases. When it rises above 18%, it is sent into the spray tower 13. In the spray tower 13, the remaining NAOH continues to absorb hydrogen sulfide in the waste gas of the solid sodium hydrosulfide device, and the concentration of the sodium hydrosulfide solution further increases. When it rises above 30%, it enters the solid sodium hydrosulfide device as a raw material to produce solid sodium hydrosulfide.
[0019] The lower part of the side wall of the absorption tower 1 is fixedly connected with a first support leg 2, and the lower part of the side wall of the spray tower 13 is fixedly connected with a second support leg 14.
[0020] By adopting the above technical solution, the first support leg 2 is used to support the absorption tower 1, and the second support leg 14 is used to support the spray tower 13.
[0021] A second flow valve 12 is arranged on the side wall of the branch pipe 11, a first flow valve 8 is arranged on the side wall of the connecting pipe 7, a flow stabilizing plate 15 is fixedly connected to the inner side wall of the absorption tower 1, and the spray head 10 is located directly above the outlet of the flow stabilizing plate 15.
[0022] By adopting the above technical solution, when the pump body 5 is started, the lye in the absorption tower 1 can flow from the liquid outlet pipe 4 into the connecting pipe 7, the first flow valve 8 is opened, and the second flow valve 12 is closed, so that the connecting pipe 7 is unblocked and the branch pipe 11 is closed. At this time, the lye is pumped to the horizontal pipe 9 at the top of the tower, and can be circulated and sprayed through the spray head 10 to react with hydrogen sulfide in the tower gas to generate sodium hydrosulfide. The arranged flow stabilizing plate 15 is used to reduce the gas flow rate to extend the reaction time and improve the reaction effect.
[0023] A base 6 is arranged on the side wall of the pump body 5.
[0024] By adopting the above technical solution, the pump body 5 is installed through the base 6.
[0025] A filter element 17 is arranged inside the filter cylinder 16. A plug 18 is detachably arranged at the mouth of the filter cylinder 16, and honeycomb holes 19 are arranged through the top surface of the plug 18. A convex plate 20 is fixedly connected to the outer side wall of the filter cylinder 16, a vertical rod 21 is fixedly connected to the top surface of the convex plate 20, and a cover 22 is fixedly connected to the top surface of the vertical rod 21, and the cover 22 corresponds to the filter cylinder 16.
[0026] By adopting the above technical solution, the gas after the reaction will enter the filter cylinder 16, and the gas can be filtered through the filter element 17 to remove harmful substances and avoid polluting the air. The arranged plug 18 is used to press the filter element 17, and the filtered gas can be discharged externally through the honeycomb holes 19. The arranged cover 22 is used to protect the filter cylinder 16 to prevent rainwater from pouring into the filter cylinder 16.
[0027] Working principle: When the present utility model is in use, the tail gas containing hydrogen sulfide and the tail gas volatilized from the sewage treatment plant containing hydrogen sulfide enter the absorption tower 1 through the feed pipe 3, and hydrogen sulfide can be absorbed by 32% NaOH solution in the absorption tower 1;
[0028] Meanwhile, start the pump body 5. The lye in the absorption tower 1 can flow from the liquid outlet pipe 4 into the connecting pipe 7. Then, open the first flow valve 8 and close the second flow valve 12 to make the connecting pipe 7 unobstructed and the branch pipe 11 closed. At this time, the lye is pumped to the horizontal pipe 9 at the top of the tower and can be circulated and sprayed through the spray head 10 to react with hydrogen sulfide in the tower gas to generate sodium hydrosulfide;
[0029] The gas after the reaction will enter the filter cartridge 16, and the gas can be filtered through the filter element 17 to remove harmful substances and avoid polluting the air. The plug 18 is provided to press the filter element 17, and the filtered gas can be discharged externally through the honeycomb holes 19;
[0030] Moreover, as the lye circulates to absorb hydrogen sulfide, the concentration of sodium hydrosulfide gradually increases. When it rises above 18%, it is sent to the spray tower 13. In the spray tower 13, the remaining NaOH continues to absorb hydrogen sulfide in the waste gas of the solid sodium hydrosulfide device, and the concentration of the sodium hydrosulfide solution further increases. When it rises above 30%, it can be used as a raw material to enter the solid sodium hydrosulfide device to produce solid sodium hydrosulfide.
[0031] Obviously, those skilled in the art can make various changes and modifications to the present utility model without departing from the spirit and scope of the present utility model. Thus, if these modifications and variations of the present utility model fall within the scope of the claims of the present utility model and its equivalent technologies, the present utility model also intends to include these changes and modifications.
Claims
1. An alkali residue recycling device, comprising an absorption tower (1), characterized in that: On one side of the absorption tower (1), a spray tower (13) is provided. At the lower part of the side wall of the absorption tower (1), a feed pipe (3) is fixedly connected in an inserted manner. At the bottom surface of the absorption tower (1), a liquid outlet pipe (4) is fixedly connected in an inserted manner. A pump body (5) is arranged between the absorption tower (1) and the spray tower (13). The pipe orifice of the liquid outlet pipe (4) is fixedly connected to the input end of the pump body (5). The output end of the pump body (5) is fixedly connected to a connecting pipe (7). A branch pipe (11) is fixedly connected in an inserted manner to the side wall of the connecting pipe (7). The output end of the branch pipe (11) extends into the spray tower (13). The output end of the side wall of the connecting pipe (7) is fixedly connected to a horizontal pipe (9). The output end of the horizontal pipe (9) is fixedly connected to a spray head (10). The spray head (10) is located inside the absorption tower (1). In the middle of the top surface of the absorption tower (1), a filter cylinder (16) is fixedly connected in an inserted manner.
2. The alkali residue recycling device according to claim 1, characterized in that, The interior of the absorption tower (1) is provided with a NAOH solution, and the concentration of the NAOH solution is 32%.
3. The alkali residue recycling device according to claim 1, characterized in that, At the lower part of the side wall of the absorption tower (1), a first leg (2) is fixedly connected. At the lower part of the side wall of the spray tower (13), a second leg (14) is fixedly connected.
4. The alkali residue recycling device according to claim 1, characterized in that, A second flow valve (12) is arranged on the side wall of the branch pipe (11), and a first flow valve (8) is arranged on the side wall of the connecting pipe (7).
5. The alkali residue recycling device according to claim 1, characterized in that, A flow stabilizing plate (15) is fixedly connected to the inner side wall of the absorption tower (1), and the spray head (10) is directly above the outlet of the flow stabilizing plate (15).
6. An alkali residue recycling device according to claim 1, characterized in that, A base (6) is arranged on the side wall of the pump body (5).
7. An alkali residue recycling device according to claim 1, characterized in that, A filter element (17) is arranged inside the filter cylinder (16). A plug (18) is detachably arranged at the orifice of the filter cylinder (16), and honeycomb holes (19) are arranged through the top surface of the plug (18).
8. An alkali residue recycling device according to claim 1, characterized in that, A convex plate (20) is fixedly connected to the outer side wall of the filter cylinder (16). A vertical rod (21) is fixedly connected to the top surface of the convex plate (20). A shielding cover (22) is fixedly connected to the top surface of the vertical rod (21), and the shielding cover (22) corresponds to the filter cylinder (16).