Honeycomb carrier pretreatment device
The pretreatment device for honeycomb carriers using physical abrasion method solves the problems of mechanical strength and safety of carriers caused by chemical pretreatment, achieves uniform distribution of active components and improves binding strength, and reduces environmental risks.
Patent Information
- Application Number
- CN202420863947.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-23
- Publication Date
- 2025-01-10
- Estimated Expiration
- 2034-04-23
AI Technical Summary
In existing technologies, the use of solutions such as HNO3, HCl, and NaOH to pretreat the honeycomb carrier can affect the carrier's mechanical strength and pose environmental and safety risks.
The pretreatment device for honeycomb carriers using physical abrasion method, through the design of pretreatment chambers A and B, utilizes abrasive solution to physically abrade the honeycomb carriers, increasing the specific surface area and surface roughness. Combined with ultrasonic treatment and heating devices, it ensures uniform flow and effective circulation of the abrasive solution.
It enhances the uniform distribution and binding strength of active components on the carrier, reduces the amount of chemical methods used, lowers environmental and safety risks, and improves the efficiency and safety of pretreatment.
Smart Images
Figure CN222325200U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of honeycomb carrier pretreatment, in particular to a honeycomb carrier pretreatment device. Background Art
[0002] Volatile organic compounds (VOCs) are a type of pollutant that not only causes a series of environmental problems, but also causes great harm to human health, which has attracted widespread attention. Therefore, it is urgent to control VOCs to reduce their emissions and control terminal treatment. Generally, VOC catalysts are used for catalytic oxidation. Catalytic oxidation has the advantages of low energy consumption, high safety factor, and no secondary pollution. It is considered to be a very promising VOC removal technology.
[0003] The VOC catalyst preparation process generally selects a suitable honeycomb carrier (common carriers include ceramics, metal honeycombs, carbon black and molecular sieves, hereinafter referred to as "carriers") and prepares the VOC catalyst by coating. In the process, the carrier is relatively smooth, basically has no micropores and mesoporous structures, and has a very small specific surface area. It is difficult for the active component (VOC active coating) to be evenly dispersed on the carrier surface, so the carrier needs to be pretreated.
[0004] The industry generally adopts chemical methods for pretreatment, that is, using acid and alkali to pretreat the carrier. In literature and industrial applications, HNO3, HCl, NaOH and other solutions are generally used for pretreatment. However, the chemical method has high requirements for equipment corrosion protection. When more or higher concentrations of acid and alkali are used, the mechanical strength of the carrier will be affected, and there will be greater environmental safety risks. Utility Model Content
[0005] The purpose of the utility model is to overcome the problem that the prior art uses HNO3, HCl, NaOH and other solutions to pre-treat the honeycomb carrier, which will affect the mechanical strength of the carrier and pose a greater environmental safety risk, and to provide a pre-treatment device for the honeycomb carrier. The pre-treatment device described in the utility model can increase the specific surface area of the honeycomb carrier and the surface roughness of the honeycomb carrier by physical wear, while enhancing the bonding strength between the active component coating and the carrier.
[0006] In order to achieve the above-mentioned purpose, the utility model provides a pretreatment device for a honeycomb carrier on one hand, the pretreatment device comprises a pretreatment chamber A and a pretreatment chamber B which are interconnected, the honeycomb carrier is placed in the pretreatment chamber A, a heating device and a flow balancing grid are arranged in the pretreatment chamber B, an abrasive solution inlet is arranged at one end of the pretreatment chamber B, and an abrasive solution outlet is arranged at one end of the pretreatment chamber A.
[0007] The abrasive solution supplied from the outside enters the pretreatment chamber B through the abrasive solution inlet, passes through the heating device and the flow equalizing grid in turn, and then enters the pretreatment chamber A to treat the honeycomb carrier. The abrasive solution flows out through the abrasive solution outlet and then enters the pretreatment chamber B again through the abrasive solution inlet for circulation.
[0008] Preferably, ultrasonic devices are arranged on both sides of the pretreatment chamber B, and the ultrasonic transducer comprises a vibration plate and an ultrasonic vibrator arranged on the vibration plate.
[0009] Preferably, the pre-processing device further comprises a frequency controller for adjusting the vibration frequency of the ultrasonic vibrator.
[0010] Preferably, soft sealing layers are provided on both sides of the inner wall of the pretreatment chamber A for fixing the honeycomb carrier.
[0011] Preferably, a bracket is provided in the pretreatment chamber A for placing or fixing the honeycomb carrier.
[0012] Preferably, the heating device is a plurality of heating rods distributed at equal distances.
[0013] Preferably, the abrasive solution inlet is a matrix inlet, and the abrasive solution outlet is a matrix outlet.
[0014] Preferably, the abrasive solution inlet and the abrasive solution outlet are arranged on the same horizontal plane, and have the same cross-sectional area.
[0015] Preferably, the pretreatment chamber B is provided with a drain port for discharging the abrasive solution.
[0016] Preferably, the pretreatment device further comprises a circulation pump for driving the abrasive solution to circulate.
[0017] Compared with the prior art, the utility model has at least the following advantages:
[0018] (1) The utility model sets a pretreatment chamber A and a pretreatment chamber B. The pretreatment chamber B pre-treats the abrasive solution, so that the abrasive solution can be more uniform, and evenly enters the pretreatment chamber A to perform uniform physical wear on the honeycomb carrier, which can not only evenly increase the specific surface area of the carrier, increase the loading amount of the active component on the carrier, and make the active component more evenly distributed on the carrier, but also evenly increase the surface roughness of the carrier, and enhance the bonding strength between the active component coating and the carrier;
[0019] (2) It is more convenient to implement the pretreatment device of the utility model;
[0020] (3) The pretreatment device of the utility model can be used alone for pretreatment, or it can be used in combination with chemical methods to reduce the concentration and time of chemical pretreatment, reduce pollution, and thus completely replace or partially replace chemical pretreatment.
[0021] (4) Preferably, the pretreatment device of the present invention can perform ultrasonic vibration treatment on abrasives that are easy to precipitate and abrasive solutions with high viscosity by arranging ultrasonic devices on both sides of the pretreatment chamber B, thereby being suitable for abrasive solutions with different properties and different viscosities. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] Figure 1 It is a top view of the pretreatment device of the honeycomb carrier described in the utility model.
[0023] Description of Reference Numerals
[0024] 1 pretreatment chamber A; 2 pretreatment chamber B; 3 honeycomb carrier; 4 heating device; 5 flow balancing grid; 6 abrasive solution inlet; 7 abrasive solution outlet; 8 vibration plate; 9 ultrasonic vibrator; 10 soft sealing layer; 11 circulation pump. DETAILED DESCRIPTION
[0025] The specific implementation of the present invention is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described here is only used to illustrate and explain the present invention, and is not used to limit the present invention.
[0026] The endpoints and any values of the ranges disclosed in this article are not limited to the precise ranges or values, and these ranges or values should be understood to include values close to these ranges or values. For numerical ranges, the endpoint values of each range, the endpoint values of each range and the individual point values, and the individual point values can be combined with each other to obtain one or more new numerical ranges, which should be considered as specifically disclosed in this article.
[0027] In the present invention, unless otherwise stated, the directional words "inside" and "outside" are used to distinguish according to the directions indicated in the schematic diagram of the present invention.
[0028] The utility model provides a pre-processing device for a honeycomb carrier, such as Figure 1 As shown, the pretreatment device comprises a pretreatment chamber A1 and a pretreatment chamber B2 which are interconnected, a honeycomb carrier 3 is placed in the pretreatment chamber A1, a heating device 4 and a flow grid 5 are arranged in the pretreatment chamber B2, an abrasive solution inlet 6 is arranged at one end of the pretreatment chamber B2, and an abrasive solution outlet 7 is arranged at one end of the pretreatment chamber A1.
[0029] The abrasive solution supplied from the outside enters the pretreatment chamber B2 through the abrasive solution inlet 6, and enters the pretreatment chamber A1 to treat the honeycomb carrier after being processed by the heating device 4 and the flow equalizing grid 5 in sequence. The abrasive solution flows out through the abrasive solution outlet 7 and then enters the pretreatment chamber B2 again through the abrasive solution inlet 6 to circulate.
[0030] In one embodiment, if Figure 1 As shown, the pretreatment device includes, from the inside to the outside, a pretreatment chamber A1 and a pretreatment chamber B2 which are interconnected. A honeycomb carrier 3 is placed in the pretreatment chamber A1, and a heating device 4 and a flow-balancing grid 5 are sequentially arranged in the pretreatment chamber B2 from the outside to the inside. An abrasive solution inlet 6 is arranged on the outside of the pretreatment chamber B2, and an abrasive solution outlet 7 is arranged on the inside of the pretreatment chamber A1.
[0031] In specific operation, the abrasive solution enters the pretreatment chamber B2 from the abrasive solution inlet 6, and then the abrasive solution is heated to the required temperature by the heating device 4, so that the abrasive solution can flow more smoothly and evenly. The heated abrasive solution obtains a rectifying effect through the equalizing effect of the flow grid 5, and the abrasive solution can smoothly and evenly enter the pretreatment chamber A1. As the abrasive solution flows, the honeycomb carrier 3 is physically worn, which can not only increase the loading amount of the active component on the carrier and make the active component more evenly distributed on the carrier, but also uniformly increase the surface roughness of the carrier and enhance the bonding strength between the active component coating and the carrier. Then the abrasive solution flows out from the abrasive solution outlet 7, thus forming a cycle. Then the abrasive solution enters the pretreatment chamber B2 from the abrasive solution inlet 6 again, passes through the heating device 4 and the flow grid 5 in turn, and then enters the pretreatment chamber A1, forming a second cycle, and so on. The cycle is repeated to improve the utilization rate of the abrasive solution.
[0032] In a specific embodiment, in order to prevent the surface of the abrasive in the abrasive solution from becoming smooth due to long-term circulation, which causes the surface of the carrier to become smooth, the time of the abrasive solution circulation physical wear cannot be too long. According to the active component formula and the different conditions of the carrier, the application time of the abrasive solution circulation physical wear method is generally not less than 5 minutes, but the circulation time should not be too long, generally not more than 40 minutes.
[0033] When the abrasive solution is not suitable for use, it needs to be discharged. In order to discharge the abrasive solution that is not suitable for use or the abrasive solution needs to be discharged after the pretreatment, a drain port can be provided in the pretreatment chamber B2 to discharge the abrasive solution.
[0034] In the present invention, the abrasive solution is composed of abrasive and water. In a specific embodiment, in order to achieve the purpose of physical wear, the abrasive can be selected from angular, sharp, hard materials, such as corundum, garnet or quartz.
[0035] In a preferred embodiment, in order to appropriately increase the surface roughness of the carrier, the particle size of the abrasive is greater than 26 μm. In a preferred embodiment, the concentration of the abrasive solution is generally not less than 5%.
[0036] In the present invention, the heating device 4 may be a common heating device in the art. In a specific embodiment, the heating device 4 may be a plurality of heating rods that are equidistantly distributed, such as a U-shaped heating rod.
[0037] In a specific implementation, the temperature of the abrasive solution can be adjusted to 35-90° C. by the heating device 4. In specific operations, the abrasive solution can be adjusted to a required temperature according to factors such as the type of abrasive and the concentration of the abrasive solution.
[0038] In the present invention, preferably, ultrasonic devices can be provided at positions corresponding to the heating device 4 on both sides of the pretreatment chamber B2. When the heating device 4 heats the abrasive solution, the abrasive solution is subjected to ultrasonic vibration treatment by the ultrasonic device, which can prevent abrasive precipitation in the abrasive solution and make the abrasive solution with higher viscosity more evenly distributed, thereby making abrasive solutions of different properties and different viscosities flow more smoothly.
[0039] In a specific embodiment, the ultrasonic transducer includes a vibration plate 8 and an ultrasonic vibrator 9 disposed on the vibration plate 8. A vibration plate 8 can be disposed on each side of the pretreatment chamber B2, and at least one ultrasonic vibrator 9 is disposed on each vibration plate 8 according to actual conditions. The vibration frequency of the ultrasonic vibrator 9 can be adjusted by a frequency controller according to the carrier and the abrasive. Generally, the frequency modulation range of the frequency controller can be 35-100 Hz.
[0040] In the present invention, there may be one or more honeycomb carriers 3 in the pretreatment chamber A1. The honeycomb carriers may be carriers of different shapes, such as circular, square, rectangular or irregular shapes. In a specific embodiment, a bracket may be provided in the pretreatment chamber A1 for placing or fixing the honeycomb carrier.
[0041] In a specific embodiment, both sides of the inner wall of the pretreatment chamber A1 may be provided with a soft sealing layer 10 for fixing the honeycomb carrier. In particular, when the honeycomb carrier 3 is an irregular carrier, the soft sealing layer 10 can clamp and fix the honeycomb carrier 3.
[0042] In the pretreatment device described in the utility model, the abrasive solution inlet 6 is a matrix inlet, and the abrasive solution outlet 7 is a matrix outlet. The abrasive solution inlet 6 and the abrasive solution outlet 7 are matrix inlets and outlets, which can play a flow balancing role and improve the physical wear effect of the abrasive on the honeycomb carrier in the pretreatment chamber A1.
[0043] In a specific embodiment, the abrasive solution inlet 6 and the abrasive solution outlet 7 are arranged on the same horizontal plane, and the cross-sectional areas of the two are the same. Such a design can make the abrasive solution flow into and out of the pretreatment device more smoothly and evenly.
[0044] In the pretreatment device described in the utility model, the pretreatment device also includes a circulation pump 11 for driving the abrasive solution to circulate.
[0045] In a more specific embodiment, Figure 1 As shown, the pretreatment device comprises, from the inside to the outside, a pretreatment chamber A1 and a pretreatment chamber B2 which are interconnected. A honeycomb carrier 3 is placed in the pretreatment chamber A1, and the honeycomb carrier 3 is placed on a bracket. Soft sealing layers 10 are arranged on both sides of the inner wall of the pretreatment chamber A1. A heating device 4 and a flow-equalizing grid 5 are arranged in sequence from the outside to the inside of the pretreatment chamber B2. The heating device 4 is a plurality of heating rods distributed at equal distances. An abrasive solution inlet 6 is arranged on the outside of the pretreatment chamber B2, and the abrasive solution inlet 6 is a matrix inlet. An abrasive solution outlet 7 is arranged on the inside of the pretreatment chamber A1, and the abrasive solution outlet 7 is a matrix outlet. The abrasive solution inlet 6 and the abrasive solution outlet 7 are arranged on the same horizontal plane, and the cross-sectional areas of the two are the same. Ultrasonic devices are arranged on both sides of the pretreatment chamber B2. The ultrasonic transposition comprises a vibration plate 8 and an ultrasonic vibrator 9 arranged on the vibration plate 8, and the vibration frequency of the ultrasonic vibrator 9 is adjusted by a frequency controller.
[0046] The abrasive solution supplied from the outside enters the pretreatment chamber B2 through the abrasive solution inlet 6, and enters the pretreatment chamber A1 to treat the honeycomb carrier after being processed by the heating device 4 and the flow equalizing grid 5 in sequence. The abrasive solution flows out through the abrasive solution outlet 7 and enters the pretreatment chamber B2 again through the abrasive solution inlet 6. The abrasive solution is driven to circulate by the circulating pump 11. After the pretreatment is completed, the abrasive solution is discharged through the drain port set in the pretreatment chamber B2.
[0047] The preferred embodiments of the present invention are described in detail above, but the present invention is not limited thereto. Within the technical concept of the present invention, the technical solution of the present invention can be subjected to a variety of simple modifications, including combining various technical features in any other suitable manner, and these simple modifications and combinations should also be regarded as the contents disclosed by the present invention and belong to the protection scope of the present invention.
Claims
1. A pretreatment device for a honeycomb carrier, characterized in that: The pretreatment device comprises a pretreatment chamber A (1) and a pretreatment chamber B (2) which are interconnected, wherein a honeycomb carrier (3) is placed in the pretreatment chamber A (1), a heating device (4) and a flow grid (5) are arranged in the pretreatment chamber B (2), an abrasive solution inlet (6) is arranged at one end of the pretreatment chamber B (2), and an abrasive solution outlet (7) is arranged at one end of the pretreatment chamber A (1), The abrasive solution supplied from the outside enters the pretreatment chamber B (2) through the abrasive solution inlet (6), and enters the pretreatment chamber A (1) to treat the honeycomb carrier after being processed by the heating device (4) and the flow equalizing grid (5) in sequence. The abrasive solution flows out through the abrasive solution outlet (7) and enters the pretreatment chamber B (2) again through the abrasive solution inlet (6) to circulate.
2. The pretreatment device according to claim 1, characterized in that: Ultrasonic devices are arranged on both sides of the pretreatment chamber B (2), and the ultrasonic devices include a vibration plate (8) and an ultrasonic vibrator (9) arranged on the vibration plate (8).
3. The pretreatment device according to claim 2, characterized in that: The pre-processing device also includes a frequency controller for adjusting the vibration frequency of the ultrasonic vibrator (9).
4. The pretreatment device according to claim 1 or 2, characterized in that: Soft sealing layers (10) are provided on both sides of the inner wall of the pretreatment chamber A (1) for fixing the honeycomb carrier.
5. The pretreatment device according to claim 1 or 2, characterized in that: The pretreatment chamber A (1) is provided with a support for placing or fixing the honeycomb carrier.
6. The pretreatment device according to claim 1 or 2, characterized in that: The heating device (4) is a plurality of heating rods distributed at equal distances.
7. The pretreatment device according to claim 1, characterized in that: The abrasive solution inlet (6) is a matrix inlet, and the abrasive solution outlet (7) is a matrix outlet.
8. The pretreatment device according to claim 1 or 7, characterized in that: The abrasive solution inlet (6) and the abrasive solution outlet (7) are arranged on the same horizontal plane, and the cross-sectional areas of the two are the same.
9. The pretreatment device according to claim 1 or 2, characterized in that: The pretreatment chamber B (2) is provided with a liquid discharge port for discharging the abrasive solution.
10. The pretreatment device according to claim 1 or 2, characterized in that: The pretreatment device also includes a circulation pump (11) for driving the abrasive solution to circulate.