Epoxy chloropropane fluidized bed reaction system catalyst filtering device

Abstract

An epoxy chloropropane fluidized bed reaction system catalyst filtering device, which comprises a fluidized bed reaction discharge pipeline, a fluidized bed reactor and a reactor heat extractor, the outer side of the fluidized bed reactor is provided with the reactor heat extractor, the top end of the fluidized bed reactor is connected with the fluidized bed reaction discharge pipeline, one end of the fluidized bed reaction discharge pipeline is connected with a filter, the top end of the filter is provided with a filter flange, the top end of the filter flange is installed with a filter core fixing disc, the top end of the filter core fixing disc is installed with a filter upper end cover with a filter flange at the bottom, and the middle part of the top end of the filter upper end cover is connected with a reaction gas phase discharge pipeline, the device is novel in structure and ingenious in design, the setting of the device greatly reduces the volume of the liquid-solid separation device, can reduce to about 1 / 20 of the natural sedimentation volume, greatly reduces the residence time of the reaction mixture in the high-concentration catalyst environment, and reduces the side reaction.

Description

Technical Field

[0001] This utility model relates to a catalyst filtration system, specifically a catalyst filtration device for an epichlorohydrin fluidized bed reaction system. Background Technology

[0002] Patent CN115501824A discloses a liquid-solid circulating fluidized bed reaction-regeneration system and its operation method for olefin epoxidation reaction. This new process can achieve efficient production of epichlorohydrin, significantly improve the effective utilization rate of hydrogen peroxide, greatly shorten the reaction time, and greatly improve the selectivity of epichlorohydrin. At the same time, it can also realize online replacement of catalyst. The comprehensive advantages of this process are outstanding.

[0003] However, the solid-liquid separation device in this process is large in size, contains a large amount of catalyst with a high concentration, and has a long material residence time. The mixture produces a lot of by-products in the presence of high-concentration catalyst, which affects the overall yield of the device and the quality of the product. Summary of the Invention

[0004] In order to overcome the shortcomings of the prior art, this utility model provides a catalyst filtration device for an epichlorohydrin fluidized bed reaction system. It effectively solves the problems of large volume of solid-liquid separation devices in the prior art, large amount of catalyst, high concentration, long material residence time, and large amount of by-products generated in the presence of high concentration catalyst, which affect the overall yield and product quality of the device.

[0005] To achieve the above objectives, this utility model provides the following technical solution: This utility model includes a fluidized bed reactor discharge pipeline, a filter, a filter element fixing plate, a filter flange, a filter upper end cap, a reaction gas phase discharge pipeline, a reaction liquid phase discharge pipeline, a filter element, a filter lower end cap, a catalyst feeding pipeline, a reaction liquid phase discharge regulating valve, a reaction gas phase discharge regulating valve, a nitrogen inlet pipeline, a nitrogen inlet regulating valve, a remote level gauge, a remote pressure gauge, a remote thermometer, a catalyst silo, a fluidized bed reactor, and a reactor heat exchanger. A reactor heat exchanger is installed on the outside of the fluidized bed reactor, and a fluidized bed reactor is connected to the top of the fluidized bed reactor. The fluidized bed reactor discharge pipeline has a filter connected to one end. A filter flange is installed at the top of the filter, and a filter element fixing plate is installed at the top of the filter flange. A filter top end with a filter flange at the bottom is installed at the top of the filter element fixing plate. A reaction gas phase discharge pipeline is connected to the middle of the top of the filter top end, and a reaction liquid phase discharge pipeline is connected to one side of the filter top end. A filter element is installed on the filter element fixing plate. A filter bottom end is installed at the bottom of the filter, and a catalyst feed pipeline is connected to the bottom of the filter bottom end. A nitrogen inlet pipeline is connected to one side of the top of the filter top end.

[0006] Preferably, a reaction liquid discharge regulating valve is installed on the reaction liquid discharge pipeline.

[0007] Preferably, the bottom end of the catalyst feeding pipeline is connected to a catalyst silo.

[0008] Preferably, a nitrogen inlet regulating valve is installed on the nitrogen inlet pipeline, and a reaction gas phase discharge regulating valve is installed on the reaction gas phase discharge pipeline.

[0009] Preferably, a remote level gauge is installed on one side of the filter upper end cap, a remote temperature gauge is installed on the other side of the filter upper end cap, and a remote pressure gauge is installed on one side of the top of the filter upper end cap.

[0010] Preferably, the filter element is made of PTFE material, and two or more filters can be used in parallel or in series.

[0011] Beneficial effects: This utility model has a novel structure and ingenious design. The device significantly reduces the volume of the liquid-solid separation device, to about 1 / 20 of the natural sedimentation volume, greatly reducing the residence time of the reaction mixture in a high-concentration catalyst environment and reducing side reactions. The filter element is made of PTFE material, which reduces the corrosion problems that may be caused by other materials in a water-containing organic environment, and prevents metal ions generated by corrosion from entering the catalyst channels, affecting the catalyst activity and service life. Attached Figure Description

[0012] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0014] Labels in the diagram: 1. Fluidized bed reactor discharge line; 2. Filter; 3. Filter element fixing plate; 4. Filter flange; 5. Filter upper end cap; 6. Reactor gas phase discharge line; 7. Reactor liquid phase discharge line; 8. Filter element; 9. Filter lower end cap; 10. Catalyst discharge line; 11. Reactor liquid phase discharge regulating valve; 12. Reactor gas phase discharge regulating valve; 13. Nitrogen inlet line; 14. Nitrogen inlet regulating valve; 15. Remote level gauge; 16. Remote pressure gauge; 17. Remote thermometer; 18. Catalyst silo; 19. Fluidized bed reactor; 20. Reactor heat exchanger. Detailed Implementation

[0015] The following is in conjunction with the appendix Figure 1 The specific embodiments of this utility model will be described in further detail.

[0016] Example 1, by Figure 1 This invention provides a catalyst filtration device for an epichlorohydrin fluidized bed reaction system, comprising a fluidized bed reaction discharge pipeline 1, a filter 2, a filter element fixing plate 3, a filter flange 4, a filter upper end cap 5, a reaction gas phase discharge pipeline 6, a reaction liquid phase discharge pipeline 7, a filter element 8, a filter lower end cap 9, a catalyst feeding pipeline 10, a reaction liquid phase discharge regulating valve 11, a reaction gas phase discharge regulating valve 12, a nitrogen inlet pipeline 13, a nitrogen inlet regulating valve 14, a remote level gauge 15, a remote pressure gauge 16, a remote thermometer 17, a catalyst silo 18, a fluidized bed reactor 19, and a reactor heat exchanger 20. The reactor heat exchanger 20 is installed on the outside of the fluidized bed reactor 19. The top of the filter is connected to a fluidized bed reaction discharge line 1. One end of the fluidized bed reaction discharge line 1 is connected to a filter 2. The top of the filter 2 is equipped with a filter flange 4. The top of the filter flange 4 is equipped with a filter element fixing plate 3. The top of the filter element fixing plate 3 is equipped with a filter upper end cap 5 with a filter flange 4 at the bottom. The middle of the top of the filter upper end cap 5 is connected to a reaction gas phase discharge line 6. One side of the filter upper end cap 5 is connected to a reaction liquid phase discharge line 7. A filter element 8 is installed on the filter element fixing plate 3. The bottom of the filter 2 is equipped with a filter lower end cap 9. The bottom of the filter lower end cap 9 is connected to a catalyst feeding line 10. One side of the top of the filter upper end cap 5 is connected to a nitrogen inlet line 13.

[0017] A reaction liquid discharge regulating valve 11 is installed on the reaction liquid discharge pipeline 7 to facilitate the control of the reaction liquid discharge pipeline 7.

[0018] The catalyst feed line 10 is connected to a catalyst hopper 18 at its bottom end for easy connection and use.

[0019] A nitrogen inlet regulating valve 14 is installed on the nitrogen inlet pipeline 13, and a reaction gas phase discharge regulating valve 12 is installed on the reaction gas phase discharge pipeline 6, so as to facilitate the control and regulation of the nitrogen inlet pipeline 13 and the reaction gas phase discharge pipeline 6.

[0020] A remote level gauge 15 is installed on one side of the filter head 5, a remote thermometer 17 is installed on the other side of the filter head 5, and a remote pressure gauge 16 is installed on one side of the top of the filter head 5, which facilitates the remote transmission of liquid level, pressure and temperature.

[0021] The filter element 8 is made of PTFE, which gives it good corrosion resistance. Filters 2 can be used in parallel or in series to ensure filtration effect and facilitate commissioning according to load or usage needs.

[0022] Working Principle: In use, the mixture of reactants and catalyst in the fluidized bed reactor 19 enters the filter 2 through the fluidized bed reactor discharge pipeline 1. The liquid phase passes through the filter element 8 and then enters the filter upper end cap 5. The pore size of the filter element 8 is smaller than the minimum diameter of the catalyst. The filter upper end cap 5 is equipped with a remote level gauge 15, a remote pressure gauge 16, and a remote thermometer 17. The liquid level in the filter 2 is controlled by the reaction liquid phase discharge regulating valve 11 on the reaction liquid phase discharge pipeline 7. CS remote automatic control adjustment (this is existing technology and will not be described in detail). The reaction system pressure is adjusted by the nitrogen inlet regulating valve 14 on the nitrogen inlet pipeline 13 and the reaction gas phase discharge regulating valve 12 on the reaction gas phase discharge pipeline 6 (DCS remote automatic control adjustment is existing technology). The temperature of the reaction liquid phase material is monitored by the remote thermometer 17. When the remote thermometer 17 of the filter shows too high, the fluidized bed reaction material is suspended, the hot water flow rate of the reactor heat exchanger 20 is increased, and the hot water temperature is reduced to cool the system.

[0023] Beneficial effects: This utility model has a novel structure and ingenious design. The device significantly reduces the volume of the liquid-solid separation device, to about 1 / 20 of the natural sedimentation volume, greatly reducing the residence time of the reaction mixture in a high-concentration catalyst environment and reducing side reactions. The filter element is made of PTFE material, which reduces the corrosion problems that may be caused by other materials in a water-containing organic environment, and prevents metal ions generated by corrosion from entering the catalyst channels, affecting the catalyst activity and service life.

[0024] Those skilled in the art should connect all electrical components and their compatible power supplies in this case via wires. Appropriate controllers and encoders should be selected according to the actual situation to meet control requirements. The specific connection and control sequence should refer to the working principle described below, where the electrical components are connected in sequence. The detailed connection methods are well-known in the art. The following mainly introduces the working principle and process, and will not describe the electrical control further.

[0025] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A catalyst filtration device for an epichlorohydrin fluidized bed reaction system, comprising a fluidized bed reaction discharge pipeline (1), a filter (2), a filter element fixing plate (3), a filter flange (4), a filter upper end cap (5), a reaction gas phase discharge pipeline (6), a reaction liquid phase discharge pipeline (7), a filter element (8), a filter lower end cap (9), a catalyst feeding pipeline (10), a reaction liquid phase discharge regulating valve (11), a reaction gas phase discharge regulating valve (12), a nitrogen inlet pipeline (13), a nitrogen inlet regulating valve (14), a remote level gauge (15), a remote pressure gauge (16), a remote thermometer (17), a catalyst silo (18), a fluidized bed reactor (19), and a reactor heat exchanger (20), characterized in that: A reactor heat exchanger (20) is installed on the outside of the fluidized bed reactor (19). A fluidized bed reaction discharge pipeline (1) is connected to the top of the fluidized bed reactor (19). A filter (2) is connected to one end of the fluidized bed reaction discharge pipeline (1). A filter flange (4) is installed at the top of the filter (2). A filter element fixing plate (3) is installed at the top of the filter flange (4). A filter upper end cap (5) with a filter flange (4) at the bottom is installed at the top of the filter element fixing plate (3). A reaction gas phase discharge pipeline (6) is connected to the middle of the top of the filter upper end cap (5). A reaction liquid phase discharge pipeline (7) is connected to one side of the filter upper end cap (5). A filter element (8) is installed on the filter element fixing plate (3). A filter lower end cap (9) is installed at the bottom of the filter (2). A catalyst feeding pipeline (10) is connected to the bottom of the filter lower end cap (9). A nitrogen inlet pipeline (13) is connected to one side of the top of the filter upper end cap (5).

2. The catalyst filtration device for an epichlorohydrin fluidized bed reaction system according to claim 1, characterized in that: A reaction liquid discharge regulating valve (11) is installed on the reaction liquid discharge pipeline (7).

3. The catalyst filtration device for an epichlorohydrin fluidized bed reaction system according to claim 1, characterized in that: The catalyst feed line (10) is connected to a catalyst silo (18) at its bottom end.

4. The catalyst filtration device for an epichlorohydrin fluidized bed reaction system according to claim 1, characterized in that: A nitrogen inlet regulating valve (14) is installed on the nitrogen inlet pipeline (13), and a reaction gas phase discharge regulating valve (12) is installed on the reaction gas phase discharge pipeline (6).

5. The catalyst filtration device for an epichlorohydrin fluidized bed reaction system according to claim 1, characterized in that: A remote level gauge (15) is installed on one side of the filter head (5), a remote thermometer (17) is installed on the other side of the filter head (5), and a remote pressure gauge (16) is installed on one side of the top of the filter head (5).

6. The catalyst filtration device for an epichlorohydrin fluidized bed reaction system according to claim 1, characterized in that: The filter element (8) is made of PTFE.

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