Coating, drying and calcining system for tubular catalyst carriers
By designing a system integrating coating, drying and baking, using tank structure and non-contact heating technology, the problems of large equipment occupying a large area, difficulty in transportation and uneven impregnation layer in traditional technology are solved, and an efficient and compact catalyst treatment process is achieved.
Patent Information
- Application Number
- CN202520309547.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-26
- Publication Date
- 2025-04-01
- Estimated Expiration
- 2035-02-26
AI Technical Summary
The traditional coating, drying and calcining steps need to be carried out in separate equipment, resulting in frequent transportation of the tubular catalyst carrier, which increases the complexity of operation and the equipment footprint. At the same time, traditional direct contact heating can easily cause the impregnation layer to dry too quickly locally, resulting in cracks or peeling.
A system integrating coating, drying and calcination is designed. The tank structure is used to sequentially heated dry inner layer, coated calcination layer and heated dry outer layer from the inside to the outside. The first transmission pump and the second transmission pump are fully impregnated with the tubular catalyst carrier, and non-contact heating is used to prevent hot air from directly contacting the impregnated layer.
The coating, drying and calcining steps are achieved in the same equipment, avoiding intermediate transportation links, improving the impregnation effect and drying quality, reducing the equipment footprint, and avoiding cracks or peeling problems in the impregnation layer.
Smart Images
Figure CN222694777U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a drying device, in particular to a coating, drying and roasting system for a tubular catalyst carrier. Background Art
[0002] In the fields of chemical industry, environmental protection and energy, tubular catalyst carriers are widely used in various catalytic reaction processes. In order to ensure the high efficiency and stability of the catalyst, it is usually necessary to coat a layer of catalyst impregnation liquid on the surface of the carrier, followed by drying and calcination. However, the traditional coating, drying and calcination steps are usually carried out in independent equipment, resulting in the need for frequent transportation of tubular catalyst carriers between different equipment. This not only increases the complexity of the operation, but also easily causes damage or contamination of the catalyst carrier during transportation. The traditional drying process usually adopts direct contact heating, and the hot air is in direct contact with the impregnation layer. It is easy for the hot air flow rate to be too high or unevenly distributed, resulting in local drying of the impregnation layer too fast, cracking or peeling, and affecting the quality of the catalyst. Since the coating, drying and calcination steps need to be carried out in different equipment, the entire process occupies a large area, which increases equipment investment and operating costs.
[0003] In order to solve the above problems, there is an urgent need for an efficient and compact system that integrates coating, drying and roasting, which can complete all process steps in the same equipment, avoid intermediate transportation links, improve the impregnation effect and drying quality, and reduce the equipment footprint. Utility Model Content
[0004] The utility model provides a coating, drying and baking system for a tubular catalyst carrier to solve the problems that coating, drying and baking devices occupy a large area, are difficult to transport during the production process, and cracks or peeling occurs on the surface of a direct contact drying impregnation layer.
[0005] In order to solve the above problems, the technical solution of the utility model is:
[0006] The coating, drying and roasting system of the tubular catalyst carrier described in the utility model comprises a coating, drying and roasting device, the coating, drying and roasting device comprises a tank body and a sealing cover, the tank body comprises a heating and drying inner layer, a coating and roasting layer, and a heating and drying outer layer from the inside to the outside, the heating and drying outer layer is connected to a drying outer layer air inlet pipe and a drying outer layer air outlet pipe, the coating and roasting layer is connected to a roasting air inlet pipe and a roasting air outlet pipe, and also comprises an impregnation liquid storage tank, the impregnation liquid storage tank is connected to the coating and roasting layer through a first impregnation liquid pipeline and a second impregnation liquid pipeline, respectively.
[0007] A coating and baking sealing cover is arranged on the top of the coating and baking layer.
[0008] By opening the coating baking sealing cover on the top of the coating baking layer, the support equipped with the tubular catalyst carrier and adapted to the inner cavity of the annular coating baking layer can be put in and taken out.
[0009] The first impregnation liquid pipeline and the second impregnation liquid pipeline are respectively provided with a first transmission pump and a second transmission pump.
[0010] The first transmission pump and the second transmission pump are used to suck the impregnation liquid into the coated calcined layer to impregnate the tubular catalyst carrier. The first transmission pump and the second transmission pump are used to swap the direction of sucking the impregnation liquid to achieve full impregnation of the tubular catalyst carrier, which greatly improves the impregnation effect of the impregnation. The loading amount and uniformity of the catalyst impregnation liquid can be controlled by adjusting the pressure of the first transmission pump and the second transmission pump.
[0011] The dry outer layer air inlet pipe is connected to the top of the heated dry outer layer, and the dry outer layer air outlet pipe is connected to the bottom of the heated dry outer layer.
[0012] The hot air enters the heating and drying outer layer through the drying outer layer air inlet pipe, heats and dries the coating baking layer on the inner side thereof, and then leaves through the drying outer layer air outlet pipe, in a continuous cycle.
[0013] The baking air inlet pipe enters from the heated and dried outer layer or the heated and dried inner layer and is connected to the upper side of the coated baking layer from the side, and the baking air outlet pipe is connected to the bottom of the coated baking layer.
[0014] The first impregnation liquid pipeline enters from the heated and dried outer layer or the heated and dried inner layer and is connected to the upper side of the coated and baked layer from the side, and the second impregnation liquid pipeline is connected to the bottom of the coated and baked layer.
[0015] The baking air inlet pipe and the first impregnation liquid pipeline are connected to the upper side of the coating baking layer from the side, which can avoid being directly connected to the coating baking sealing cover, which makes it difficult to open and close the coating baking sealing cover.
[0016] The drying inner layer air inlet pipe is connected to the top of the heating drying inner layer, and the drying inner layer air outlet pipe is connected to the bottom of the heating drying inner layer.
[0017] The hot air enters the heating and drying inner layer through the drying inner layer air inlet pipe, heats and dries the coated baking layer on the outside thereof, and then leaves through the drying inner layer air outlet pipe, in a continuous cycle.
[0018] Non-contact heating is performed on the inside and outside of the coated calcined layer to avoid direct contact between the hot air and the impregnation layer on the tubular catalyst carrier, causing uneven impregnation layer, and to avoid excessively high or uneven distribution of the contacting hot air flow rate, which causes the surface of the impregnation layer to dry too quickly locally, resulting in cracks or peeling.
[0019] A bracket is arranged at the bottom of the tank body.
[0020] Working principle:
[0021] The coating and baking sealing cover on the top of the coating and baking layer is opened, and a support frame equipped with a tubular catalyst carrier and adapted to the inner cavity of the annular coating and baking layer is placed in the coating and baking layer, and the coating and baking sealing cover is closed. The impregnation liquid in the impregnation liquid storage tank is sucked into the coating and baking layer through the first transmission pump and the second transmission pump to impregnate the tubular catalyst carrier. The direction of sucking the impregnation liquid is exchanged by the first transmission pump and the second transmission pump to achieve full impregnation of the tubular catalyst carrier. The loading amount and uniformity of the catalyst impregnation liquid are controlled by adjusting the pressure of the first transmission pump and the second transmission pump. After the impregnation is completed, the impregnation liquid in the coating and calcining layer is drained, the coating and calcining sealing cover is opened, the valves on the drying outer layer air inlet pipe, the drying outer layer air outlet pipe, the drying inner layer air inlet pipe and the drying inner layer air outlet pipe are opened, and hot air is introduced into the heating and drying outer layer and the heating and drying inner layer to carry out non-contact drying of the impregnated tubular catalyst carrier in the coating and calcining layer. After the drying step is completed, the coating and calcining sealing cover is closed, the valves on the calcining air inlet pipe and the calcining air outlet pipe are opened, and high-temperature flue gas is introduced into the coating and calcining layer to calcine the dried tubular catalyst carrier.
[0022] The beneficial effects of the utility model are as follows:
[0023] (1) The utility model combines the coating, drying and calcining steps into one set of facilities, eliminating the need to unload and transport the tubular catalyst, thereby solving the problem of inconvenient transportation of the tubular catalyst and saving floor space.
[0024] (2) The utility model utilizes the first transmission pump and the second transmission pump to suck the impregnation liquid into the coating and calcining layer to impregnate the tubular catalyst carrier. By exchanging the direction of sucking the impregnation liquid by the first transmission pump and the second transmission pump, the tubular catalyst carrier can be fully impregnated, which greatly improves the impregnation effect. Moreover, by adjusting the pressure of the first transmission pump and the second transmission pump, the loading amount and uniformity of the catalyst impregnation liquid can be controlled.
[0025] (3) The utility model performs non-contact heating on the inside and outside of the coated calcined layer, thereby avoiding the unevenness of the impregnation layer caused by direct contact between the hot air and the impregnation layer on the tubular catalyst carrier, and avoiding the problem of excessively high or unevenly distributed hot air flow rate causing the surface of the impregnation layer to dry too quickly, resulting in cracks or peeling. BRIEF DESCRIPTION OF THE DRAWINGS
[0026] The accompanying drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. In the accompanying drawings:
[0027] Figure 1 It is a structural schematic diagram of the coating, drying and roasting system of the tubular catalyst carrier of the utility model;
[0028] Figure 2 This is a schematic diagram of the structure of the coating, drying and roasting device of the utility model;
[0029] In the figure: 1. tank body; 2. sealing cover; 3. heating and drying outer layer; 301. drying outer layer air inlet pipe; 302. drying outer layer air outlet pipe; 4. coating and baking layer; 401. baking air inlet pipe; 402. baking air outlet pipe; 403. first impregnation liquid pipeline; 404. second impregnation liquid pipeline; 5. heating and drying inner layer; 501. drying inner layer air inlet pipe; 502. drying inner layer air outlet pipe; 6. coating and baking sealing cover; 7. bracket; 8. impregnation liquid storage tank; 9. first transmission pump; 10. second transmission pump. DETAILED DESCRIPTION
[0030] The present invention will be described in detail below in conjunction with the embodiments.
[0031] Example 1
[0032] like Figure 1-2 As shown, the coating, drying and calcining system of the tubular catalyst carrier includes a coating, drying and calcining device, and the coating, drying and calcining device includes a tank body 1 and a cover 2. The tank body 1 is composed of a heated and dried inner layer 5, a coated and calcined layer 4, and a heated and dried outer layer 3 from the inside to the outside. The heated and dried outer layer 3 is connected to a dried outer layer air inlet pipe 301 and a dried outer layer air outlet pipe 302. The coated and calcined layer 4 is connected to a calcined air inlet pipe 401 and a calcined air outlet pipe 402. It also includes an impregnation liquid storage tank 8, and the impregnation liquid storage tank 8 is connected to the coated and calcined layer 4 through a first impregnation liquid pipeline 403 and a second impregnation liquid pipeline 404, respectively.
[0033] The top and bottom of the heating and drying inner layer 5 are ring-shaped, that is, the center of the tank body 1 is hollow, which can save volume and thus reduce the amount of hot air used.
[0034] A coating and baking sealing cover 6 is provided on the top of the coating and baking layer 4 .
[0035] By opening the coating and baking sealing cover 6 on the top of the coating and baking layer 4, the bracket 7 equipped with the tubular catalyst carrier and adapted to the inner cavity of the annular coating and baking layer 4 can be put in and taken out.
[0036] The first impregnation liquid pipeline 403 and the second impregnation liquid pipeline 404 are respectively provided with a first transmission pump 9 and a second transmission pump 10 .
[0037] The first transfer pump 9 and the second transfer pump 10 are used to suck the impregnation liquid into the coated calcined layer 4 to impregnate the tubular catalyst carrier. The first transfer pump 9 and the second transfer pump 10 exchange the direction of sucking the impregnation liquid to achieve full impregnation of the tubular catalyst carrier, which greatly improves the impregnation effect of the impregnation. By adjusting the pressure of the first transfer pump 9 and the second transfer pump 10, the loading amount and uniformity of the catalyst impregnation liquid can be controlled.
[0038] The drying outer layer air inlet pipe 301 is connected to the top of the heating and drying outer layer 3 , and the drying outer layer air outlet pipe 302 is connected to the bottom of the heating and drying outer layer 3 .
[0039] The hot air enters the drying outer layer 3 through the drying outer layer air inlet pipe 301 to heat and dry the coated baking layer 4 inside it, and then leaves through the drying outer layer air outlet pipe 302, in a continuous cycle.
[0040] The baking air inlet pipe 401 enters from the heated and dried outer layer 3 and is connected to the upper side of the coated baking layer 4 from the side, and the baking air outlet pipe 402 is connected to the bottom of the coated baking layer 4.
[0041] The first impregnation liquid pipeline 403 enters from the heated and dried outer layer 3 and is connected to the upper side of the coated and baked layer 4 from the side, and the second impregnation liquid pipeline 404 is connected to the bottom of the coated and baked layer 4.
[0042] The baking air inlet pipe 401 and the first impregnation liquid pipeline 403 are connected to the upper side of the coating baking layer 4 from the side, which can avoid being directly connected to the coating baking sealing cover 6, which makes it difficult to open and close the coating baking sealing cover 6.
[0043] The drying inner layer air inlet pipe 501 is connected to the top of the heating and drying inner layer 5 , and the drying inner layer air outlet pipe 502 is connected to the bottom of the heating and drying inner layer 5 .
[0044] The hot air enters the heating and drying inner layer 5 through the drying inner layer air inlet pipe 501, heats and dries the coated baking layer 4 on the outside thereof, and then leaves through the drying inner layer air outlet pipe 502, in a continuous cycle.
[0045] Non-contact heating is performed on the inside and outside of the coated calcined layer 4 to avoid direct contact between the hot air and the impregnation layer on the tubular catalyst carrier, causing uneven impregnation layer, and to avoid excessively high or unevenly distributed hot air flow rate, which causes the surface of the impregnation layer to dry too quickly locally, resulting in cracks or peeling.
[0046] A bracket 7 is provided at the bottom of the tank body 1 .
[0047] Working principle:
[0048] The coating and baking sealing cover 6 on the top of the coating and baking layer 4 is opened, and the support frame equipped with the tubular catalyst carrier and adapted to the inner cavity of the annular coating and baking layer 4 is placed in the coating and baking layer 4, and the coating and baking sealing cover 6 is covered. The impregnation liquid in the impregnation liquid storage tank 8 is sucked into the coating and baking layer 4 through the first transmission pump 9 and the second transmission pump 10 to impregnate the tubular catalyst carrier. The direction of sucking the impregnation liquid is exchanged by the first transmission pump 9 and the second transmission pump 10 to achieve full impregnation of the tubular catalyst carrier. The loading amount and uniformity of the catalyst impregnation liquid are controlled by adjusting the pressure of the first transmission pump 9 and the second transmission pump 10. After completion, the impregnation liquid in the coating and calcining layer 4 is drained, the coating and calcining sealing cover 6 is opened, and the valves on the drying outer layer air inlet pipe 301, the drying outer layer air outlet pipe 302, the drying inner layer air inlet pipe 501 and the drying inner layer air outlet pipe 502 are opened, and hot air is introduced into the heated and dried outer layer 3 and the heated and dried inner layer 5 to perform non-contact drying on the impregnated tubular catalyst carrier in the coating and calcining layer 4. After the drying step is completed, the coating and calcining sealing cover 6 is closed, and the valves on the roasting air inlet pipe 401 and the roasting air outlet pipe 402 are opened to introduce high-temperature flue gas into the coating and calcining layer 4 to roast the dried tubular catalyst carrier.
Claims
1. A coating, drying and roasting system for a tubular catalyst carrier, characterized in that: The invention comprises a coating, drying and roasting device, the coating, drying and roasting device comprising a can body (1) and a sealing cover (2), the can body (1) comprising, from the inside to the outside, a heated and dried inner layer (5), a coating and roasting layer (4), and a heated and dried outer layer (3), the heated and dried outer layer (3) being connected to a dried outer layer air inlet pipe (301) and a dried outer layer air outlet pipe (302), the coating and roasting layer (4) being connected to a roasting air inlet pipe (401) and a roasting air outlet pipe (402), the heated and dried inner layer (5) being connected to a dried inner layer air inlet pipe (501) and a dried inner layer air outlet pipe (502), and further comprising an impregnation liquid storage tank (8), the impregnation liquid storage tank (8) being connected to the coating and roasting layer (4) via a first impregnation liquid pipeline (403) and a second impregnation liquid pipeline (404), respectively.
2. The coating, drying and roasting system for a tubular catalyst carrier according to claim 1, characterized in that: A coating and baking sealing cover (6) is provided on the top of the coating and baking layer (4).
3. The coating, drying and roasting system for a tubular catalyst carrier according to claim 1, characterized in that: The first impregnation liquid pipeline (403) and the second impregnation liquid pipeline (404) are respectively provided with a first transmission pump (9) and a second transmission pump (10).
4. The coating, drying and roasting system for a tubular catalyst carrier according to claim 1, characterized in that: The drying outer layer air inlet pipe (301) is connected to the top of the heating and drying outer layer (3), and the drying outer layer air outlet pipe (302) is connected to the bottom of the heating and drying outer layer (3).
5. The coating, drying and roasting system for a tubular catalyst carrier according to claim 1, characterized in that: The baking air inlet pipe (401) enters from the heated and dried outer layer (3) or the heated and dried inner layer (5) and is connected to the upper side of the coated baking layer (4) from the side, and the baking air outlet pipe (402) is connected to the bottom of the coated baking layer (4).
6. The coating, drying and roasting system for a tubular catalyst carrier according to claim 1, characterized in that: The first impregnation liquid pipeline (403) enters from the heated and dried outer layer (3) or the heated and dried inner layer (5) and is connected to the upper side of the coated and baked layer (4) from the side, and the second impregnation liquid pipeline (404) is connected to the bottom of the coated and baked layer (4).
7. The coating, drying and roasting system for a tubular catalyst carrier according to claim 1, characterized in that: The drying inner layer air inlet pipe (501) is connected to the top of the heating and drying inner layer (5), and the drying inner layer air outlet pipe (502) is connected to the bottom of the heating and drying inner layer (5).
8. The coating, drying and roasting system for a tubular catalyst carrier according to claim 1, characterized in that: A bracket (7) is provided at the bottom of the tank body (1).