Combined cleaning tank for denitration catalyst module
By designing a joint cleaning tank for denitrification catalyst modules, the slideway and suspension equipment are used to achieve convenient cleaning of the catalyst modules, and the impurities are removed through air-water washing, which solves the problems of decreasing catalyst activity and cumbersome cleaning of the catalyst process, and achieves efficient catalyst cleaning and activity recovery.
Patent Information
- Application Number
- CN202421284284.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-06
- Publication Date
- 2025-02-28
- Estimated Expiration
- 2034-06-06
Smart Images
Figure 00000000_0000_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of denitration catalyst activation, in particular to a combined cleaning tank for a denitration catalyst module. Background Art
[0002] The selective catalytic reduction technology (NH3-SCR) with NH3 or urea as the reducing agent is currently the most widely used flue gas denitrification technology. Its core is the catalyst, which can directly affect the overall denitrification efficiency and stability. The industrial catalyst is mainly a vanadium-titanium catalyst with anatase-type titanium dioxide loaded with vanadium pentoxide and other additives. Its reaction temperature is 220-420℃ and is widely used in medium and high temperature denitrification systems such as coal-fired power plants.
[0003] During the use of the catalyst, the pores are blocked due to the adsorption and bridging of large particles of fly ash or deposited fly ash. Due to the blockage of the pores, the reactants in the flue gas cannot further enter the inner surface of the catalyst pores, resulting in a decrease in activity. At the same time, the local flue gas flow rate is too fast, and the insufficient residence time causes the pressure drop to increase and the wear to increase, resulting in physical deactivation of the catalyst. Since the flue gas fly ash contains more compounds of elements such as K, Na, P, and As, they react with the active sites of the catalyst accordingly, thereby reducing the number of active sites participating in the denitrification reaction, causing the catalyst to be chemically deactivated.
[0004] In the catalyst activation process, water washing, acid washing and alkali washing of the catalyst are necessary steps for catalyst activation. The existing water washing, acid washing and alkali washing of the catalyst need to be carried out in a separate cleaning tank. The cleaning process is extremely cumbersome and consumes a lot of manpower. Utility Model Content
[0005] In order to solve the above technical problems, the utility model provides a combined cleaning tank for a denitration catalyst module which is easy to use and has good cleaning effect.
[0006] The technical solution of the utility model is:
[0007] A combined cleaning tank for a denitration catalyst module, comprising a plurality of cleaning tank bodies, each of which is provided with a slideway on the side thereof, and a suspension device is provided at the slideway;
[0008] The bottom of each cleaning tank body is provided with an air pipe and a liquid pipe, and the air pipe and the liquid pipe are provided with a plurality of outlets. The air pipe is connected to an external fan, and the liquid pipe intersects with the upper part of the cleaning tank body through a circulation pipeline, and a circulation pump is provided at the circulation pipeline;
[0009] The bottom of each cleaning tank body is arranged in the shape of an inclined plate, and the discharge port at each cleaning tank body is arranged at the lowest end of the inclined plate.
[0010] Preferably, a fixing frame for fixing the air pipe and the liquid pipe is provided at the bottom of each cleaning tank body.
[0011] Preferably, a bracket is provided at the bottom of each cleaning tank body.
[0012] Preferably, a downwardly extending enclosure is provided at the bottom of the bracket, and a plurality of outlets at the air pipe and the liquid pipe are all arranged within the projection surface of the enclosure.
[0013] Preferably, a first support rod is disposed at the bottom of each bracket, a second support rod is disposed at the bottom of each cleaning tank body, the first support rod and the second support rod are sleeved with each other, and a spring is disposed between the first support rod and the second support rod.
[0014] Preferably, a sealing strip is provided at the bottom edge of the enclosure.
[0015] Preferably, a liquid guide groove is provided at the edge of the upper portion of each cleaning tank body.
[0016] Preferably, a bracket is provided on the side of each cleaning tank body, and a guardrail is provided on the bracket.
[0017] Preferably, a filter is provided at each of the circulation pipelines.
[0018] Preferably, the filter is a Y-shaped filter.
[0019] Compared with the prior art, the combined cleaning tank of the denitration catalyst module of the utility model is provided with a plurality of cleaning tank bodies for containing cleaning liquid, and a slide is provided on the side of each of the cleaning tank bodies. A suspension device is provided at the slide, and the catalyst module to be cleaned is sent into the designated cleaning tank through the suspension device, thereby having the beneficial effect of convenient use.
[0020] An air pipe and a liquid pipe are provided at the bottom of each cleaning tank body, and a plurality of outlets are provided at the air pipe and the liquid pipe. The air pipe is connected to an external fan, and the liquid pipe intersects with the upper part of the cleaning tank body through a circulation pipeline. A circulation pump is provided at the circulation pipeline. During use, impurities attached to the pores of the catalyst module can be easily removed by combined air and water washing, thereby having the beneficial effect of good cleaning effect. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] Figure 1 It is a schematic diagram of an embodiment of a combined cleaning tank for a denitration catalyst module of the present invention.
[0022] Figure 2 It is a schematic diagram of an embodiment of a cleaning tank body of a combined cleaning tank of a denitration catalyst module of the present invention.
[0023] Figure 3 It is a schematic diagram of an embodiment of the cooperation between any cleaning tank body and the liquid pipe and the gas pipe of the combined cleaning tank of the denitration catalyst module of the utility model.
[0024] Figure 4 It is a schematic diagram of a preferred embodiment of the cooperation between the bracket, the enclosure and the cleaning tank body of the combined cleaning tank of the denitration catalyst module of the utility model.
[0025] Description of the numbers in the figure:
[0026] 101-cleaning tank body; 102-slide; 103-guardrail; 104-bracket; 105-liquid inlet trough; 106-circulation pipeline; 107-liquid pipe; 108-fixed frame; 109-discharge port; 110-air pipe; 111-bracket; 112-first support rod; 113-enclosure; 114-spring; 115-second support rod. DETAILED DESCRIPTION
[0027] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0028] Embodiment 1:
[0029] like Figure 1 , 2 In the embodiment shown in Figure 3, the combined cleaning tank of the denitration catalyst module of the utility model is suitable for water washing, acid washing and alkali washing of the denitration catalyst module. The specific combined cleaning tank of the denitration catalyst module includes a plurality of cleaning tank bodies 101, wherein, in order to ensure the strength of the cleaning tank body 101, each cleaning tank body 101 includes a frame, and the part of the outside of the frame that contacts the cleaning liquid is coated with a corrosion-resistant layer, wherein the material of the corrosion-resistant layer can be 304, 316 stainless steel or polyethylene, ABS engineering plastics and other materials.
[0030] The slideway 102 arranged on the side of each cleaning tank is used for the sliding of the suspension equipment, wherein the suspension equipment can be in the form of a gantry crane, and the catalyst modules to be cleaned can be easily moved between the cleaning tank bodies 101 through each suspension equipment.
[0031] The air pipe 110 and the liquid pipe 107 arranged at the bottom of each cleaning tank body 101 are used to generate airflow and water flow when cleaning the catalyst module, so as to realize the flushing of the duct at the catalyst module by air-water combined washing, so as to realize the removal of impurities at the duct of the catalyst module. Specifically, a plurality of through holes are arranged at the side wall near the bottom of each cleaning tank body 101, and each air pipe 110 and the liquid pipe 107 enter the position installed at the bottom through the through hole at the bottom of each cleaning tank, wherein the water flow and the airflow are averaged to ensure the cleaning effect of the duct, and the air pipe 110 and the liquid pipe 107 are provided with multiple roots, and each air pipe 110 and the liquid pipe 107 are evenly distributed with a plurality of outlets. Each air pipe 110 is connected to the main air supply pipeline through an air distribution valve, and each liquid pipe 107 is connected to the circulation pipeline 106 through a water distribution valve. When the catalyst module is placed in the cleaning tank body 101 at this place, the circulation pump and the air valve at this place can be opened to realize the cleaning of the catalyst module placed there.
[0032] The bottom of each cleaning tank body 101 is arranged in an inclined plate shape, and the discharge port 109 at each cleaning tank body 101 is arranged at the lowest end of the inclined plate, so that when the cleaning liquid there is turbid, the cleaning liquid in the tank can be discharged and the cleaning tank body 101 can be flushed.
[0033] When in use, the catalyst module to be cleaned is hoisted to the cleaning tank body 101 by a suspension device, and the catalyst module is immersed in the cleaning liquid. The circulation pump and the air valve at the cleaning tank body 101 are turned on, and the gas-water washing of the catalyst module is achieved through the generated water flow and bubbles. When the specified cleaning time is reached, the catalyst module is removed by the hoisting equipment and sent to the next cleaning tank body 101.
[0034] Embodiment 2:
[0035] On the basis of Example 1, Figure 3 In the illustrated embodiment, in order to prevent the air pipe 110 and the liquid pipe 107 at each cleaning tank from being damaged due to vibration during operation, a fixing frame 108 is provided at the bottom of each cleaning tank body 101, and the air pipe 110 and the liquid pipe 107 exposed at the bottom of each cleaning tank body 101 are fixed by the fixing frame 108.
[0036] Embodiment 3:
[0037] On the basis of Example 1 or 2, Figure 4 In the illustrated embodiment, in order to prevent the catalyst module from contacting the air pipe 110 and the liquid pipe 107 at the bottom during the cleaning process, thereby damaging the air pipe 110 and the liquid pipe 107, a bracket 111 is provided at the bottom of each cleaning tank body 101. When the catalyst module is immersed in the cleaning liquid, the bracket 111 can support the catalyst module to prevent the catalyst module from hitting the air pipe 110 and the liquid pipe 107.
[0038] Embodiment 4:
[0039] On the basis of Example 3, Figure 4 In the illustrated embodiment, in order to better guide the bubbles generated at the air pipe 110 and the water flow generated at the liquid pipe 107 to flow into the channel at the catalyst module, a downwardly extending enclosure 113 is provided at the bottom of the bracket 111, and the multiple outlets at the air pipe 110 and the liquid pipe 107 are all provided within the projection surface of the enclosure 113. When in use, the upper edge of the enclosure 113 and the bottom of the bracket 111 are seamlessly welded. It can be understood that the structure of the catalyst module includes a channel with a catalytic effect, and a shield is provided outside the channel, and ports are provided at both ends of the shield. When the catalyst module is placed on the bracket 111, the contact surface between the port of the catalyst module and the bracket body is sealed, and the bubbles and water flow can be guided into the channel of the catalyst module under the action of the enclosure 113.
[0040] like Figure 4 In the illustrated embodiment, in order to further enhance the effect of gas-water combined washing, a first support rod 112 is provided at the bottom of each bracket 111, and a second support rod 115 is provided at the bottom of each cleaning tank body 101. The first support rod 112 and the second support rod 115 are mutually sleeved, and a spring 114 is provided between the first support rod 112 and the second support rod 115. When the catalyst module is placed on the upper part of the bracket 111, due to the pressure of the catalyst module, the bracket 111 moves downward until the enclosure 113 and the bottom of the cleaning tank body 101 are in contact, thereby forming a closed area between the enclosure 113, the bottom of the cleaning tank body 101, and the bracket 111. Therefore, in the process of gas-water combined washing, all the bubbles and water flow pass through the pores of the catalyst module, thereby achieving a better flushing effect on the catalyst module. On the other hand, after cleaning is completed, the catalyst module is removed, and the bracket 111 is propped up by the elastic force of the spring 114. At this time, a gap is generated between the enclosure 113 and the bottom of the cleaning tank body 101, which can facilitate the discharge of impurities in dead corners when flushing the cleaning tank body 101.
[0041] A sealing strip is provided at the bottom edge of the enclosing plate 113. When the enclosing plate 113 contacts the bottom of the cleaning tank body 101, the sealing strip further improves the sealing effect between the enclosing plate 113 and the bottom of the cleaning tank body 101.
[0042] Embodiment 5:
[0043] On the basis of any one of embodiments 1-4, Figure 2 In the illustrated embodiment, when the catalyst module is transferred to the next cleaning tank body 101 , a liquid guide groove 105 is provided at the edge of the upper portion of the cleaning tank body 101 to prevent the cleaning liquid dripping from the catalyst module from flowing out along the upper edge of the cleaning tank body 101 .
[0044] Embodiment 6:
[0045] On the basis of any one of embodiments 1-5, Figure 1 In the illustrated embodiment, in order to facilitate the operation of the staff, a bracket 104 is provided on the side of each cleaning tank body 101, and a guardrail 103 is provided at the bracket 104. When cleaning the catalyst module, flushing each cleaning tank body 101 and daily inspections, the staff can stand on the bracket 104 to carry out the cleaning operation.
[0046] Embodiment 7:
[0047] On the basis of any one of Examples 1-6, in order to prevent larger particles of impurities from entering the liquid pipe 107 and causing blockage of the outlet, a filter is provided at the circulation pipeline 106, wherein, in order to facilitate the removal of filtered impurities, the filter can be in the form of a Y-shaped filter.
[0048] The embodiments described above are only preferred specific implementation methods of the present utility model, but the protection scope of the present utility model is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present utility model according to the technical solution and utility model concept of the present utility model, which should be covered by the protection scope of the present utility model.
Claims
1. A combined cleaning tank for a denitration catalyst module, comprising a plurality of cleaning tank bodies (101), characterized in that: A slideway (102) is provided on the side of each cleaning tank body (101), and a suspension device is provided on the slideway (102); The bottom of each cleaning tank body (101) is provided with an air pipe (110) and a liquid pipe (107), and a plurality of outlets are provided at the air pipe (110) and the liquid pipe (107). The air pipe (110) is connected to an external fan, and the liquid pipe (107) intersects the upper part of the cleaning tank body (101) through a circulation pipeline (106), and a circulation pump is provided at the circulation pipeline (106); The bottom of each cleaning tank body (101) is arranged in the shape of an inclined plate, and the discharge port (109) at each cleaning tank body (101) is arranged at the lowest end of the inclined plate.
2. The combined cleaning tank for the denitration catalyst module according to claim 1, characterized in that: A fixing frame (108) for fixing the air pipe (110) and the liquid pipe (107) is arranged at the bottom of each cleaning tank body (101).
3. The combined cleaning tank for the denitration catalyst module according to claim 1, characterized in that: A bracket (111) is provided at the bottom of each cleaning tank body (101).
4. The combined cleaning tank for the denitration catalyst module according to claim 3, characterized in that: A downwardly extending enclosure (113) is provided at the bottom of the bracket (111), and a plurality of outlets at the gas pipe (110) and the liquid pipe (107) are arranged within the projection surface of the enclosure (113).
5. The combined cleaning tank for the denitration catalyst module according to claim 4, characterized in that: A first support rod (112) is disposed at the bottom of each bracket (111), and a second support rod (115) is disposed at the bottom of each cleaning tank body (101). The first support rod (112) and the second support rod (115) are sleeved with each other, and a spring (114) is disposed between the first support rod (112) and the second support rod (115).
6. The combined cleaning tank for the denitration catalyst module according to claim 5, characterized in that: A sealing strip is provided at the bottom edge of the enclosure plate (113).
7. The combined cleaning tank for the denitration catalyst module according to claim 1, characterized in that: A liquid introduction groove (105) is provided at the edge of the upper portion of each cleaning tank body (101).
8. The combined cleaning tank for the denitration catalyst module according to claim 1, characterized in that: A bracket (104) is provided on the side of each cleaning tank body (101), and a guardrail (103) is provided on the bracket (104).
9. The combined cleaning tank for the denitration catalyst module according to claim 1, characterized in that: A filter is provided at each circulation pipeline (106).
10. The combined cleaning tank for the denitration catalyst module according to claim 9, characterized in that: The filter is a Y-shaped filter.