Ultrasonic cleaning pool for denitration catalyst module
By using a combination technology of ultrasonic generator and water flow erosion in the ultrasonic cleaning tank of the catalyst module, the problem of difficult removal of strong impurities in the catalyst channel is solved, and the activation effect and service life of the catalyst is significantly improved.
Patent Information
- Application Number
- CN202421283880.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-06
- Publication Date
- 2025-03-04
- Estimated Expiration
- 2034-06-06
AI Technical Summary
The prior art is difficult to effectively remove strong impurities attached to the catalyst pores during the catalyst activation process, resulting in a decrease in catalyst activity and physical inactivation.
An ultrasonic cleaning tank using a denitrification catalyst module is used to install an ultrasonic generator at the bottom and side walls of the cleaning tank body, and the impurities in the catalyst channel are peeled off by ultrasonic, and the impurities are washed away by the water flow generated by the cleaning tube to drain them.
It effectively removes impurities with strong adhesion in the catalyst pores, improves the activation effect of the catalyst and extends the service life of the catalyst.
Smart Images
Figure CN222551560U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of denitration catalyst activation, in particular to an ultrasonic cleaning pool 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 fly ash particles 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 velocity is too fast, and the residence time is insufficient, causing the pressure drop to increase and the wear to increase, resulting in physical deactivation of the catalyst.
[0004] During the catalyst activation process, water washing, acid washing and alkali washing are necessary steps for catalyst activation. However, after water washing, acid washing and alkali washing, some impurities still adhere to the pores of the catalyst and are difficult to remove, which reduces the catalyst activation effect. Utility Model Content
[0005] In order to solve the above technical problems, the utility model provides an ultrasonic cleaning tank for a denitration catalyst module which has a good effect of removing impurities with strong adhesion to catalyst pores.
[0006] The technical solution of the utility model is:
[0007] An ultrasonic cleaning tank for a denitration catalyst module comprises a cleaning tank body and an ultrasonic generating assembly, wherein each ultrasonic generator of the ultrasonic generating assembly is arranged at the bottom and side wall of the cleaning tank body;
[0008] A support frame is provided at the bottom of the cleaning pool body, a plurality of cleaning pipes are provided at the lower part of the support frame, a plurality of liquid outlets are provided at each of the cleaning pipes, each of the cleaning pipes intersects with the interior of the cleaning pool body through a conduit, and a booster pump is provided at the conduit;
[0009] The bottom of the cleaning pool body is arranged in an inclined plate shape, and the discharge port is arranged at the lowest point of the bottom.
[0010] Preferably, a groove is provided on the side wall of the cleaning tank body, and the groove is used to accommodate the ultrasonic generator.
[0011] Preferably, a sealing cover is provided on the upper part of the support frame, and the area of the sealing cover located above each liquid outlet is open.
[0012] Preferably, a flexible gasket is provided at the contact portion between the sealing cover and the catalyst module.
[0013] Preferably, the flexible gasket is arranged in a hollow shape.
[0014] Preferably, a filter screen is provided at the open portion of the sealing cover.
[0015] Preferably, the sealing cover is provided with a plurality of through slots, and a plurality of blocking pieces are hingedly connected to the through slots.
[0016] Preferably, the density of the baffle is less than the density of the cleaning liquid.
[0017] Preferably, a heating component is also included, and the heating component is used to heat the cleaning liquid.
[0018] Compared with the prior art, the ultrasonic cleaning tank of the denitration catalyst module of the utility model comprises a cleaning tank body and an ultrasonic generating assembly, wherein the ultrasonic generators of the ultrasonic generating assembly are arranged at the bottom and side walls of the cleaning tank body. During use, the ultrasonic waves emitted by the ultrasonic generators can effectively strip off impurities with strong adsorption capacity in the catalyst pores; the water flow generated at the cleaning pipe can flush the catalyst pores so that the impurities can be discharged, thus having the beneficial effect of removing impurities with strong adhesion to the catalyst pores. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 It is a schematic diagram of an embodiment of an ultrasonic cleaning tank for a denitration catalyst module of the utility model.
[0020] Figure 2 It is a schematic diagram of the bottom structure of the ultrasonic cleaning tank of the denitration catalyst module of the utility model.
[0021] Figure 3 It is a schematic diagram of an embodiment of the cooperation between the cleaning pipe and the cleaning tank body of the ultrasonic cleaning tank of the denitration catalyst module of the utility model.
[0022] Figure 4 It is a schematic diagram of an embodiment of the cooperation between the bracket of the ultrasonic cleaning tank of the denitration catalyst module and the cleaning tank body of the utility model.
[0023] Figure 5 It is a schematic diagram of a preferred embodiment of the cooperation between the bracket and the sealing cover of the ultrasonic cleaning tank of the denitration catalyst module of the utility model.
[0024] Description of the numbers in the figure:
[0025] 101-cleaning tank body; 102-conduit; 103-discharge port; 104-ultrasonic generator; 105-cleaning pipe; 106-support frame; 107-through groove; 108-filter screen; 109-sealing cover; 110-blocking piece. DETAILED DESCRIPTION
[0026] 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.
[0027] Embodiment 1:
[0028] like Figure 1-4 In the illustrated embodiment, the cleaning tank body 101 is used to contain cleaning liquid, wherein, in order to ensure the strength of the cleaning tank body 101, each cleaning tank body 101 includes a frame, and the outside of the frame in contact with 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.
[0029] The ultrasonic generator 104 of the ultrasonic generating assembly is arranged at the bottom and side of the cleaning tank body 101 to ensure that the ultrasound is transmitted to the inside of the catalyst module as much as possible. During operation, the ultrasound emitted by each ultrasonic generator 104 is transmitted to the pores of the catalyst, and the impurities adhering to the pores of the catalyst module are peeled off through the cavitation effect. Wherein, in order to prevent the ultrasonic generators 104 at the bottom and the side from interfering when working at the same time, a control unit may be provided at the ultrasonic generating assembly, and specifically, a plurality of I / O interfaces are provided at the control unit, and each ultrasonic generator 104 is respectively connected in parallel with the mains through a bidirectional thyristor switch, and the gate G of each bidirectional thyristor switch is electrically connected to the I / O interface at the control unit, and through the clock function at the control unit, the I / O interface at the control unit sends a high level to the gate G at each bidirectional thyristor switch, and the sequential opening of each ultrasonic generator 104 can be realized.
[0030] In order to prevent the catalyst module from colliding with the ultrasonic generator 104 when the catalyst module is placed in the cleaning tank body 101 , a groove is provided at the side wall of the cleaning tank body 101 , and the groove is used to accommodate the ultrasonic generator 104 .
[0031] The support frame 106 at the bottom of the cleaning tank body 101 is used to support the catalyst module to prevent the catalyst module from contacting the cleaning pipe 105. A plurality of cleaning pipes 105 arranged at the lower part of the support frame 106 intersect with the conduit 102 through the water diversion valve, and the upper end of the conduit 102 intersects with the interior of the cleaning tank. Under the action of the booster pump at the conduit 102, the upper cleaning liquid can be extracted and distributed to the cleaning pipe 105, and discharged through each liquid outlet to form a water flow inside the cleaning tank body 101, so as to flush out the impurities peeled off in the catalyst pores.
[0032] The bottom of the cleaning tank body 101 is arranged in an inclined plate state, and the discharge port 103 is arranged at the lowest point of the bottom, so as to facilitate flushing of the cleaning tank body 101 .
[0033] Embodiment 2:
[0034] On the basis of Example 1, Figure 4 , 5 In the illustrated embodiment, in order to further enhance the flushing effect on the catalyst pores, a sealing cover 109 is provided on the upper part of the support frame 106, and the sealing cover 109 is provided in an open area above each liquid outlet. The sealing cover 109 is fixed to the upper part of the support frame 106, and the side of the sealing cover 109 is welded to the inner wall of the cleaning tank body 101. It can be understood that the structure of the catalyst module includes a catalytic pore, and a shield is provided on the outside of the catalytic pore, and ports are provided at both ends of the shield. When the catalyst module is placed on the bracket, the port just blocks the open area of the sealing cover 109. When working, the water flow generated by the cleaning pipe 105 flows through the open area and enters the catalyst pore.
[0035] In this embodiment, in order to enhance the airtightness between the port of the catalyst module and the sealing cover 109, a flexible gasket is provided at the contacting portion between the sealing cover 109 and the catalyst module. The material of the flexible gasket can be silicone or rubber.
[0036] In order to further enhance the sealing effect, the flexible gasket is provided in a hollow shape. When in use, a proper amount of air can be filled into the hollow part of the flexible gasket.
[0037] Embodiment 3:
[0038] On the basis of Example 2, Figure 5 In the illustrated embodiment, during the flushing process, in order to prevent larger particles of impurities from entering the pores of the catalyst module again, a filter 108 is provided at the open portion of the sealing cover 109, and the filter 108 is used to intercept larger particles of impurities.
[0039] Embodiment 4:
[0040] On the basis of Example 1 or 3, Figure 5In the illustrated embodiment, in order to flush the bottom of the cleaning tank body 101, a plurality of through slots 107 are provided at the sealing cover 109, a plurality of baffles 110 are hinged at the through slots 107, and a torsion spring is provided between each baffle 110 and the sealing cover 109. After the cleaning liquid in the cleaning tank body 101 is drained, the baffles 110 sag under the action of gravity, and clean water can reach the bottom of the cleaning tank body 101 from the through slots 107, so as to flush the bottom dead corner of the cleaning tank body 101.
[0041] The baffle 110 can be made of plastic material to ensure that the density of the baffle 110 is less than the density of the cleaning liquid. When the cleaning pool body 101 is filled with cleaning liquid, the baffle 110 can float under the action of its own buoyancy to seal the through groove 107.
[0042] Embodiment 5:
[0043] Based on any one of the embodiments 1-4, a heating component is added inside the cleaning tank body 101, and the heating component is used to heat the cleaning liquid to enhance the ultrasonic component's stripping effect on impurities in the catalyst module pores. The heating component can be in the form of a resistive heating rod.
[0044] 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. An ultrasonic cleaning tank for a denitration catalyst module, comprising a cleaning tank body (101) and an ultrasonic generating assembly, characterized in that: The ultrasonic generators (104) of the ultrasonic generating assembly are arranged at the bottom and side walls of the cleaning tank body (101); A support frame (106) is provided at the bottom of the cleaning pool body (101), a plurality of cleaning pipes (105) are provided at the lower part of the support frame (106), a plurality of liquid outlets are provided at each cleaning pipe (105), each cleaning pipe (105) intersects with the interior of the cleaning pool body (101) via a conduit (102), and a booster pump is provided at the conduit (102); The bottom of the cleaning tank body (101) is arranged in an inclined plate shape, and the discharge port (103) is arranged at the lowest point of the bottom.
2. The ultrasonic cleaning tank for the denitration catalyst module according to claim 1, characterized in that: A groove is provided on the side wall of the cleaning tank body (101), and the groove is used to accommodate the ultrasonic generator (104).
3. The ultrasonic cleaning tank for the denitration catalyst module according to claim 1, characterized in that: A sealing cover (109) is arranged on the upper part of the support frame (106), and the area of the sealing cover (109) located above each liquid outlet is open.
4. The ultrasonic cleaning tank for the denitration catalyst module according to claim 3, characterized in that: A flexible gasket is provided at the contact portion between the sealing cover (109) and the catalyst module.
5. The ultrasonic cleaning tank for the denitration catalyst module according to claim 4, characterized in that: The flexible gasket is arranged in a hollow shape.
6. The ultrasonic cleaning tank for the denitration catalyst module according to claim 3, characterized in that: A filter screen (108) is provided at the open portion of the sealing cover (109).
7. The ultrasonic cleaning tank for the denitration catalyst module according to claim 3, characterized in that: A plurality of through slots (107) are provided at the sealing cover (109), and a plurality of blocking pieces (110) are hingedly connected to the through slots (107).
8. The ultrasonic cleaning tank for the denitration catalyst module according to claim 7, characterized in that: The density of the baffle (110) is lower than the density of the cleaning liquid.
9. The ultrasonic cleaning tank for the denitration catalyst module according to claim 1, characterized in that: Also included is a heating component, which is used to heat the cleaning fluid.