A multi-stage solid-liquid separation device for crude m-phenylenediamine

Abstract

The utility model relates to chemical solid -liquid separation device technical field, specifically a kind of multi-stage solid-liquid separation device of m-phenylenediamine crude product, including catalyst settling kettle, the lateral wall of catalyst settling kettle is equipped with first flow rate control valve;In the process that m-phenylenediamine carries out multi-stage separation, it sequentially passes through catalyst settling kettle, first flow rate control valve, first pump body, primary membrane filter kettle, second flow rate control valve, secondary membrane filter kettle and the pipeline intercommunication structure of second pump body and obtains m-phenylenediamine purified liquid to carry out multi-stage solid-liquid separation, in the process of separation, the flow rate of each pipeline is controlled by first flow rate control valve, second flow rate control valve and third flow rate control valve, to balance the air pressure balance between each kettle, reduce the situation that flow rate reduces even counterflow because of pressure problem occurs.

Description

Technical Field

[0001] This utility model relates to the technical field of chemical solid-liquid separation devices, specifically to a multi-stage solid-liquid separation device for crude m-phenylenediamine. Background Technology

[0002] m-Phenylenediamine is an important organic synthesis raw material, mainly used as a dye intermediate in the manufacture of dyes such as Basic Orange, Basic Brown G, and Direct Fast Black G, as well as fur dyes. It is an important intermediate in the production of pesticides, pharmaceuticals, and functional materials. It is used as a curing agent for epoxy resins, a setting accelerator for cement, a mordant, a color developer, and as a petroleum additive and raw material in the manufacture of pharmaceuticals. It is also used as a reagent for the photometric determination of nitrite and active chlorine in water.

[0003] Publication number CN208008699U discloses a multi-stage solid-liquid separation device for crude m-phenylenediamine, which achieves internal catalyst recycling, avoids catalyst loss and contact with air causing catalyst deactivation, and improves catalyst lifespan, enabling thorough separation of catalyst and liquid materials. However, this device cannot effectively control the flow rate between pipelines during use, and the pressure imbalance inside the tank can easily occur due to differences in reaction rates during the catalytic separation process. Therefore, we propose a multi-stage solid-liquid separation device for crude m-phenylenediamine. Utility Model Content

[0004] To address the problems in the existing technology, this utility model provides a multi-stage solid-liquid separation device for crude m-phenylenediamine.

[0005] The technical solution adopted by this utility model to solve its technical problem is a multi-stage solid-liquid separation device for crude m-phenylenediamine; it includes a catalyst settling tank, a first flow rate control valve is installed on the side wall of the catalyst settling tank, the end of the first flow rate control valve away from the catalyst settling tank is connected to a first pump body through a pipe, the liquid outlet end of the first pump body is connected to the bottom side of a first-stage membrane filter tank through a pipe, the top end of the first-stage membrane filter tank is connected to one end of a second flow rate control valve through a pipe, the end of the second flow rate control valve away from the first-stage membrane filter tank is connected to the top end of a second-stage membrane filter tank through a pipe, and the bottom end of the second-stage membrane filter tank is connected to a third flow rate control valve through a pipe;

[0006] The bottom of the primary membrane filter vessel is provided with mounting grooves on both sides. Solid-liquid filter screens are installed inside the two mounting grooves. The bottom of the solid-liquid filter screens is connected to an adapter. The adapter is installed on the end of the pipe on the liquid outlet side of the first pump body facing the primary membrane filter vessel.

[0007] By adopting the above technical solution, in the multi-stage separation process of m-phenylenediamine, it sequentially passes through a pipeline connection structure of a catalyst settling vessel, a first flow rate control valve, a first pump body, a first-stage membrane filtration vessel, a second flow rate control valve, a second-stage membrane filtration vessel, and a second pump body to obtain a purified m-phenylenediamine solution. During the separation process, the flow rate of each pipeline is controlled by the first flow rate control valve, the second flow rate control valve, and the third flow rate control valve to balance the gas pressure between each vessel and reduce the occurrence of flow rate reduction or even backflow due to pressure issues.

[0008] When the liquid to be separated enters the primary and secondary membrane filtration vessels, some solid impurities will still remain inside. By using an adapter installed at the pipeline interface and working with the solid-liquid filter screen installed in the installation tank, filtration and separation will be performed during input to avoid clogging.

[0009] Specifically, the bottom center of the primary membrane filter is connected to one end of the third flow rate control valve via a pipe, and the section of the third flow rate control valve away from the primary membrane filter is connected to the bottom center of the secondary membrane filter via a pipe.

[0010] By adopting the above technical solution, the rate of discharge of purified liquid is controlled by a third flow rate control valve.

[0011] Specifically, a second pump body with the same pipeline connection structure as the first pump body is provided between the primary membrane filter and the secondary membrane filter.

[0012] By adopting the above technical solution, the primary membrane filter and the secondary membrane filter are connected through the same pump body pipeline and solid-liquid filtration connection structure.

[0013] Specifically, the first flow rate control valve, the second flow rate control valve, and the third flow rate control valve can all be operated manually or remotely to control the valve body.

[0014] By adopting the above technical solution, the flow rate in the pipeline connected by the first flow rate control valve, the second flow rate control valve and the third flow rate control valve can be adjusted to a suitable rate through manual or remote operation of the control terminal, thereby balancing the gas pressure in each vessel and avoiding a decrease in separation rate due to pressure.

[0015] Specifically, both the solid-liquid filter screen and the adapter can be replaced by threaded disassembly.

[0016] By adopting the above technical solution, the solid-liquid filter screen and adapter are installed between the pipeline and the membrane filter vessel by replacing and using a sealing gasket, thereby separating the solution flowing into the membrane filter vessel.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. In the multi-stage separation process of m-phenylenediamine, it sequentially passes through a catalyst settling vessel, a first flow rate control valve, a first pump body, a first-stage membrane filtration vessel, a second flow rate control valve, a second-stage membrane filtration vessel, and a second pump body through a pipeline connection structure to obtain a purified m-phenylenediamine solution. During the separation process, the flow rate of each pipeline is controlled by the first flow rate control valve, the second flow rate control valve, and the third flow rate control valve to balance the gas pressure between each vessel and reduce the occurrence of flow rate reduction or even backflow due to pressure issues.

[0019] 2. When the liquid to be separated enters the primary membrane filter and the secondary membrane filter, some solid impurities will still remain inside. By using an adapter installed at the pipeline interface and working with the solid-liquid filter screen installed in the installation tank, filtration and separation will be performed during input to avoid clogging. Attached Figure Description

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0021] Figure 1 This is an isometric view of the present invention;

[0022] Figure 2 This is a schematic diagram of the connection structure between the primary membrane filter and the secondary membrane filter of this utility model.

[0023] Figure 3 This is a disassembled schematic diagram of the bottom pipe connection structure of the primary membrane filtration vessel of this utility model;

[0024] In the diagram: 1. Catalyst settling vessel; 2. First flow rate control valve; 3. First pump body; 4. Primary membrane filter vessel; 5. Second flow rate control valve; 6. Secondary membrane filter vessel; 7. Second pump body; 8. Third flow rate control valve; 9. Mounting slot; 10. Solid-liquid filter screen; 11. Adapter. Detailed Implementation

[0025] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0026] Please see Figure 1-3This utility model provides a technical solution: a multi-stage solid-liquid separation device for crude m-phenylenediamine, including a catalyst settling tank 1. A first flow rate control valve 2 is installed on the side wall of the catalyst settling tank 1. The end of the first flow rate control valve 2 away from the catalyst settling tank 1 is connected to a first pump body 3 through a pipe. The liquid outlet end of the first pump body 3 is connected to the bottom side of a first-stage membrane filter tank 4 through a pipe. The top end of the first-stage membrane filter tank 4 is connected to one end of a second flow rate control valve 5 through a pipe. The end of the second flow rate control valve 5 away from the first-stage membrane filter tank 4 is connected to the top end of a second-stage membrane filter tank 6 through a pipe. The bottom end of the second-stage membrane filter tank 6 is connected to a third flow rate control valve 8 through a pipe.

[0027] The bottom of the primary membrane filter vessel 4 is provided with mounting grooves 9 on both sides. Solid-liquid filter screens 10 are installed inside the two mounting grooves 9. The bottom of the solid-liquid filter screens 10 is connected to an adapter 11. The adapter 11 is installed on the end of the pipe on the outlet side of the first pump body 3 facing the primary membrane filter vessel 4.

[0028] In use, during the multi-stage separation of m-phenylenediamine, it sequentially passes through a pipeline connecting catalyst settling vessel 1, first flow rate control valve 2, first pump body 3, first-stage membrane filter vessel 4, second flow rate control valve 5, second-stage membrane filter vessel 6, and second pump body 7 to achieve multi-stage solid-liquid separation and obtain purified m-phenylenediamine solution. During the separation process, the flow rate of each pipeline is controlled by the first flow rate control valve 2, the second flow rate control valve 5, and the third flow rate control valve 8 to balance the gas pressure between each vessel and reduce the occurrence of flow rate reduction or even backflow due to pressure issues.

[0029] When the liquid to be separated enters the primary membrane filter 4 and the secondary membrane filter 6, some solid impurities will still remain inside. By using the adapter 11 installed at the pipeline interface and cooperating with the solid-liquid filter screen 10 installed in the installation tank 9, filtration and separation will be performed during input to avoid clogging.

[0030] like Figure 1-3 As shown, the bottom center of the primary membrane filter 4 is connected to one end of the third flow rate control valve 8 via a pipe, and the section of the third flow rate control valve 8 away from the primary membrane filter 4 is connected to the bottom center of the secondary membrane filter 6 via a pipe.

[0031] During use, the rate of discharge of purified solution is controlled by the third flow rate control valve 8.

[0032] like Figure 1-3 As shown, a second pump body 7 with the same pipeline connection structure as the first pump body 3 is provided between the primary membrane filter vessel 4 and the secondary membrane filter vessel 6.

[0033] In use, the primary membrane filter 4 and the secondary membrane filter 6 are connected through the same pump body pipeline and solid-liquid filtration connection structure.

[0034] like Figure 1-3 As shown, the first flow rate control valve 2, the second flow rate control valve 5, and the third flow rate control valve 8 can all be operated manually or remotely to control the valve body.

[0035] During use, the first flow rate control valve 2, the second flow rate control valve 5, and the third flow rate control valve 8 can be operated manually or remotely via the control terminal to adjust the flow rate in the pipeline connected to these three valves to a suitable rate, thereby balancing the gas pressure in each vessel and preventing the separation rate from decreasing due to pressure issues.

[0036] like Figure 2 As shown, both the solid-liquid filter screen 10 and the adapter 11 can be replaced by threaded disassembly.

[0037] In use, the solid-liquid filter screen 10 and the adapter 11 are installed between the pipeline and the membrane filter vessel by replacing and using a sealing gasket to separate the solution flowing into the membrane filter vessel.

[0038] The working principle and usage process of this utility model are as follows: During the multi-stage separation of m-phenylenediamine, it sequentially passes through a pipeline connecting catalyst settling vessel 1, first flow rate control valve 2, first pump body 3, first-stage membrane filter vessel 4, second flow rate control valve 5, second-stage membrane filter vessel 6, and second pump body 7 to achieve multi-stage solid-liquid separation and obtain purified m-phenylenediamine solution. During the separation process, the flow rate of each pipeline is controlled by the first flow rate control valve 2, the second flow rate control valve 5, and the third flow rate control valve 8 to balance the gas pressure between the vessels and reduce the occurrence of flow rate reduction or even backflow due to pressure issues. When the liquid to be separated enters the first-stage membrane filter vessel 4 and the second-stage membrane filter vessel 6, some solid impurities will still remain inside. By using an adapter 11 installed at the pipeline interface and cooperating with the solid-liquid filter screen 10 installed in the installation groove 9, filtration and separation are performed during input to avoid clogging.

[0039] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The descriptions of the above embodiments and specifications are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of protection claimed by this utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A multi-stage solid-liquid separation device for crude m-phenylenediamine, characterized in that, The system includes a catalyst settling vessel (1), a first flow rate control valve (2) is mounted on the side wall of the catalyst settling vessel (1), a first pump body (3) is connected to the end of the first flow rate control valve (2) away from the catalyst settling vessel (1) through a pipe, the liquid outlet end of the first pump body (3) is connected to the bottom side of the first-stage membrane filter vessel (4) through a pipe, the top end of the first-stage membrane filter vessel (4) is connected to one end of the second flow rate control valve (5) through a pipe, the end of the second flow rate control valve (5) away from the first-stage membrane filter vessel (4) is connected to the top end of the second-stage membrane filter vessel (6) through a pipe, and the bottom end of the second-stage membrane filter vessel (6) is connected to the third flow rate control valve (8) through a pipe. The bottom of the primary membrane filter vessel (4) is provided with mounting grooves (9) on both sides. The two mounting grooves (9) are equipped with solid-liquid filter screens (10). The bottom of the solid-liquid filter screens (10) is connected to an adapter (11). The adapter (11) is installed on the end of the pipe on the outlet side of the first pump body (3) facing the primary membrane filter vessel (4).

2. The multi-stage solid-liquid separation device for crude m-phenylenediamine according to claim 1, characterized in that, The bottom center of the primary membrane filter (4) is connected to one end of the third flow rate control valve (8) via a pipe, and the section of the third flow rate control valve (8) away from the primary membrane filter (4) is connected to the bottom center of the secondary membrane filter (6) via a pipe.

3. The multi-stage solid-liquid separation device for crude m-phenylenediamine according to claim 1, characterized in that, A second pump body (7) with the same pipeline connection structure as the first pump body (3) is provided between the primary membrane filter (4) and the secondary membrane filter (6).

4. The multi-stage solid-liquid separation device for crude m-phenylenediamine according to claim 1, characterized in that, The first flow rate control valve (2), the second flow rate control valve (5) and the third flow rate control valve (8) can all be operated manually or remotely to control the valve body.

5. The multi-stage solid-liquid separation device for crude m-phenylenediamine according to claim 1, characterized in that, Both the solid-liquid filter screen (10) and the adapter (11) can be replaced by threaded disassembly.

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