Continuous production system for composite catalyst
Through the use of composite catalyst continuous production systems in the production of load catalysts, combining the technology of improving machines, inclined vibration sieves and dry crushing boxes, the problem of low moisture absorption and impregnation efficiency of raw materials is solved. Improve and reduce production costs.
Patent Information
- Application Number
- CN202423184076.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-24
- Publication Date
- 2025-01-24
- Estimated Expiration
- 2034-12-24
AI Technical Summary
In the prior art, when producing a supported catalyst, metal compound raw materials are prone to agglomeration due to moisture absorption, resulting in blockage of the conveying pipeline, and difficulty in removing air during the impregnation process, large power consumption, which affects production continuity and efficiency.
The continuous production system is adopted by the composite catalyst. By the combination of the pipe, the tilt vibration sieve, and the dry crusher box, the raw materials of the moisture block are separated and shattered, and they are recycled. Premier and vacuum impregnation, improve impregnation efficiency and reduce production costs.
It effectively avoids pipeline blockage, improves raw material mixing efficiency and energy utilization, improves impregnation efficiency, reduces production costs, and realizes the recycling and reuse of organic gas phase.
Smart Images
Figure CN222384685U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of continuous production of catalysts, in particular to a continuous production system of composite catalysts. Background Art
[0002] A supported catalyst is a catalyst that supports the active components on the surface of a support material. Its structure mainly includes two key parts: the active component and the support. The active component is the part that actually plays a catalytic role and is responsible for accelerating the chemical reaction; the support plays the role of supporting the active component, so that the active component can be highly dispersed on its surface, thereby improving the utilization efficiency of the active component. As a type of supported catalyst, the supported SCR denitrification catalyst has a very good effect in the field of industrial flue gas denitrification.
[0003] In workshop production, metal compound raw materials may agglomerate due to moisture absorption, resulting in blockage of the conveying pipeline, which seriously affects the continuous production. The existing device solves this problem by directly crushing the whole raw material, but it is time-consuming and labor-intensive, and the wet raw materials after crushing cause great trouble to the subsequent mixing, which leads to uneven mixing; in the impregnation process, the existing device directly impregnates through negative pressure, but it is difficult to completely remove the air in the impregnation liquid, and the impregnation time is long and the power consumption is large. Utility Model Content
[0004] In view of the above deficiencies in the prior art, the purpose of the utility model is to provide a continuous production system for a composite catalyst, which separates the damp and agglomerated raw materials through the coordinated use of an elevator, an inclined vibrating screen and a drying and crushing box, first dries them by hot air in a roasting furnace, then crushes them, and then recycles them for reuse, thereby avoiding pipeline blockage and improving the raw material mixing efficiency and energy utilization rate; through the setting of a pre-impregnation tank, the raw materials are pre-impregnated, and a suitable pre-treatment liquid is selected to soak the carrier, preliminarily replacing part of the air in the pores of the carrier, and at the same time moistening the carrier. After soaking, the carrier and the pre-treatment liquid are directly placed in a vacuum impregnation box without draining or centrifuging, which greatly improves the impregnation efficiency and reduces the production cost; through the setting of a condenser, the organic gas phase volatilized during the drying process is recycled and reused.
[0005] The utility model is realized by adopting the following technical solutions:
[0006] The composite catalyst continuous production system comprises a lower hopper, which is connected to a pre-impregnation tank via a mixing and stirring box, which is connected to a centrifuge via a vacuum impregnation box, which is connected to a roasting furnace via a drying box, a drying and crushing box connected to the lower hopper, and a condenser on the drying box. All pipelines of the device are provided with insulation on the outside.
[0007] The composite catalyst continuous production system also includes an elevator, which is connected to a lower hopper, and an inclined vibrating screen and an arch breaker are arranged inside the lower hopper.
[0008] A material guide plate is arranged between the lower hopper and the drying and crushing box. The material guide plate is arranged tiltedly and is connected to the inclined vibrating screen.
[0009] A crushing knife is arranged at the bottom of the drying and crushing box, and a hot air inlet is arranged on the vertical wall of the drying and crushing box, and the hot air inlet is located above the crushing knife.
[0010] The mixing and stirring box is provided with a stirrer inside, the vacuum impregnation box is connected with a vacuum pump, and the centrifuge is connected with the impregnation liquid recovery tank through an impregnation liquid recovery pipeline.
[0011] A ventilation pipe is connected between the condenser and the drying box. A liquid phase recovery pipe is arranged on the outside of the ventilation pipe. The liquid phase recovery pipe is connected to the condenser but not to the drying box.
[0012] The height of the ventilation pipe is higher than the liquid phase recovery pipe, and the liquid phase recovery pipe is connected to the impregnation liquid recovery pipe through a connecting pipe.
[0013] The roasting furnace is connected with the hot air inlet through a hot air duct.
[0014] The pre-soaking method is adopted to select a suitable pre-treatment liquid (such as ethanol) to soak the carrier, preliminarily replace part of the air in the carrier pores, and at the same time make the carrier wet. After soaking, the carrier and the pre-treatment liquid are directly placed in a vacuum impregnation box without draining or centrifugation. Then vacuum treatment is carried out to further remove the air remaining in the carrier pores and the small amount of air dissolved in the pre-treatment liquid under low pressure. After the vacuum treatment is completed, since the container is in a negative pressure state, the impregnation liquid can enter the carrier pores more smoothly, mix with the pre-treatment liquid and further complete the impregnation process. The pre-soaking method can perform preliminary air replacement and wetting on the carrier, providing better conditions for subsequent vacuum treatment. During the vacuum treatment, since the carrier has been partially filled with the pre-treatment liquid, the removal of air is more efficient, and the vacuum treatment time can be reduced, and the operating cost of the equipment can be reduced. It can also make the impregnation liquid better penetrate into the carrier pores, improving the loading uniformity of the active components.
[0015] The working principle of the utility model is:
[0016] The raw materials enter the lower hopper through the elevator, and after separation by the inclined vibrating screen, the fine materials enter the mixing and stirring box, and the agglomerated raw materials enter the drying and crushing box for processing through the guide plate. The raw materials after mixing enter the pre-impregnation tank for pre-impregnation, and then are transferred to the vacuum impregnation box for impregnation; the raw materials after impregnation enter the centrifuge for liquid-solid separation, the liquid phase enters the impregnation liquid recovery tank for recovery, and the solid phase enters the drying box for drying. After drying, the solid phase passes through the roasting furnace and enters the granulator for processing. The condenser condenses and recovers the organic gas phase volatilized during the drying process, and the gas phase in the roasting furnace enters the drying and crushing box through the hot air duct.
[0017] Compared with the prior art, the beneficial effects of the utility model are:
[0018] The utility model composite catalyst continuous production system is adopted to separate damp and agglomerated raw materials through the coordinated use of an elevator, an inclined vibrating screen and a drying and crushing box, and firstly dry them by hot air in a roasting furnace, and then crush them, and finally recycle them for reuse, thereby avoiding pipeline blockage and improving raw material mixing efficiency and energy utilization rate; through the setting of a pre-impregnation tank, the raw materials are pre-impregnated, and a suitable pre-treatment liquid is selected to soak the carrier, and part of the air in the pores of the carrier is preliminarily replaced, and the carrier is moistened at the same time. After soaking, the carrier and the pre-treatment liquid are directly put into a vacuum impregnation box without draining or centrifuging, thereby greatly improving the impregnation efficiency and reducing the production cost; through the setting of a condenser, the organic gas phase volatilized in the drying process is recycled for reuse. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 This is a schematic diagram of the structure of the continuous production system of the composite catalyst of the utility model;
[0020] In the figure: 1. lower hopper; 2. mixing and stirring box; 3. pre-impregnation tank; 4. vacuum impregnation box; 5. centrifuge; 6. drying box; 7. roasting furnace; 8. granulator; 9. drying and crushing box; 10. impregnation liquid recovery tank; 11. elevator; 12. inclined vibrating screen; 13. crushing knife; 14. hot air inlet; 15. agitator; 16. vacuum pump; 17. condenser; 18. hot air duct; 19. ventilation pipe; 20. liquid phase recovery pipe; 21. impregnation liquid recovery pipe; 22. connecting pipe. DETAILED DESCRIPTION
[0021] In order to make the purpose and technical solution of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings.
[0022] Example 1
[0023] like Figure 1As shown, the continuous production system of composite catalyst includes a lower hopper 1, which is connected to a prepreg tank 3 through a mixing and stirring box 2, and the prepreg tank 3 is connected to a centrifuge 5 through a vacuum impregnation box 4, and the centrifuge 5 is connected to a roasting furnace 7 through a drying box 6. The lower hopper 1 is connected to a drying and crushing box 9, and a condenser 17 is provided on the drying box 6. It also includes an elevator 11, which is connected to the lower hopper 1, and an inclined vibrating screen 12 and an arch breaker are provided inside the lower hopper 1. The outer side of all pipelines of this device is provided with insulation. A guide plate is provided between the lower hopper 1 and the drying and crushing box 9, and the guide plate is inclined. The guide plate is connected to the inclined vibrating screen 12. A crushing knife 13 is provided at the bottom of the drying and crushing box 9, and a hot air inlet 14 is provided on the vertical wall of the drying and crushing box 9, and the hot air inlet 14 is located above the crushing knife 13. A stirrer 15 is provided inside the mixing and stirring box 2, a vacuum pump 16 is connected to the vacuum impregnation box 4, and the centrifuge 5 is connected to the impregnation liquid recovery tank 10 through the impregnation liquid recovery pipe 21. A vent pipe 19 is connected between the condenser 17 and the drying box 6, and a liquid phase recovery pipe 20 is provided on the outside of the vent pipe 19. The liquid phase recovery pipe 20 is connected to the condenser 17 and is not connected to the drying box 6. The height of the vent pipe 19 is higher than the liquid phase recovery pipe 20, and the liquid phase recovery pipe 20 is connected to the impregnation liquid recovery pipe 21 through the connecting pipe 22. The roasting furnace 7 is connected to the hot air inlet 14 through the hot air pipe 18.
[0024] The above composite catalyst continuous production system, when in operation, comprises the following steps:
[0025] (1) The raw materials enter the lower hopper 1 through the elevator 11, and after separation by the inclined vibrating screen 12, the fine materials enter the mixing and stirring box 2, and the agglomerated raw materials enter the drying and crushing box 9 for processing through the guide plate. The raw materials after mixing enter the pre-impregnation tank 3 for pre-impregnation, and then are transferred to the vacuum impregnation box 4 for impregnation; (2) The raw materials after impregnation enter the centrifuge 5 for liquid-solid separation, the liquid phase enters the impregnation liquid recovery tank 10 for recovery, and the solid phase enters the drying box 6 for drying. After drying, the solid phase is processed by the roasting furnace 7 and then enters the granulator 8 for processing. The condenser 17 condenses and recovers the organic gas phase volatilized during the drying process, and the gas phase in the roasting furnace 7 enters the drying and crushing box 9 through the hot air duct 18.
Claims
1. A composite catalyst continuous production system, characterized in that: The invention comprises a lower hopper (1), wherein the lower hopper (1) is connected to a prepreg tank (3) via a mixing and stirring box (2), the prepreg tank (3) is connected to a centrifuge (5) via a vacuum impregnation box (4), the centrifuge (5) is connected to a roasting furnace (7) via a drying box (6), the lower hopper (1) is connected to a drying and crushing box (9), and a condenser (17) is provided on the drying box (6).
2. The composite catalyst continuous production system according to claim 1, characterized in that: It also includes an elevator (11), which is connected to the lower hopper (1), and an inclined vibrating screen (12) and an arch breaker are provided inside the lower hopper (1).
3. The composite catalyst continuous production system according to claim 2, characterized in that: A material guide plate is provided between the lower hopper (1) and the drying and crushing box (9), the material guide plate is arranged at an inclination, and the material guide plate is connected to the inclined vibrating screen (12).
4. The composite catalyst continuous production system according to claim 1, characterized in that: A crushing knife (13) is provided at the bottom of the drying and crushing box (9), and a hot air inlet (14) is provided on the vertical wall of the drying and crushing box (9), and the hot air inlet (14) is located above the crushing knife (13).
5. The composite catalyst continuous production system according to claim 1, characterized in that: The mixing and stirring box (2) is provided with a stirrer (15) inside, the vacuum impregnation box (4) is connected to a vacuum pump (16), and the centrifuge (5) is connected to the impregnation liquid recovery tank (10) via an impregnation liquid recovery pipe (21).
6. The composite catalyst continuous production system according to claim 5, characterized in that: A ventilation pipe (19) is connected between the condenser (17) and the drying box (6). A liquid phase recovery pipe (20) is provided on the outside of the ventilation pipe (19). The liquid phase recovery pipe (20) is connected to the condenser (17) but not to the drying box (6).
7. The continuous production system of composite catalyst according to claim 6, characterized in that: The height of the ventilation pipe (19) is higher than that of the liquid phase recovery pipe (20), and the liquid phase recovery pipe (20) is connected to the impregnation liquid recovery pipe (21) via a connecting pipe (22).
8. The composite catalyst continuous production system according to claim 4, characterized in that: The roasting furnace (7) is connected to the hot air inlet (14) via a hot air duct (18).