Tank-type solid-liquid separation device for recrystallization mother liquor

Abstract

The utility model relates to the technical field of filtering and separating devices, and discloses a tank-type solid-liquid separating device for recrystallization mother liquor, which comprises a solid-liquid separating tank, the top of the solid-liquid separating tank is provided with a feed pipe, a water adding pipe and a communicating pipe, and the bottom of the solid-liquid separating tank is provided with a discharge hole and a circulating liquid outlet; a distribution disc is arranged on the upper portion of an inner cavity of the solid-liquid separation tank, the feeding pipe, the water adding pipe and the communicating pipe extend into the solid-liquid separation tank, outlets of the feeding pipe and the communicating pipe are located below the distribution disc, and an outlet of the water adding pipe is located above the distribution disc; a metal porous baffle is arranged at the lower part of the inner cavity of the solid-liquid separation tank; the communicating pipe is connected with the circulating liquid outlet after passing through the communicating pipe liquid pump; and the discharge hole is respectively communicated with the filtrate storage tank and the product storage tank after passing through a tee joint. A product solution can be directly obtained by adding water to dissolve a filter cake solid, only the filter cloth needs to be replaced, the filtering cost is low, the equipment is convenient to operate, maintain and clean, and the device does not need to be detached.

Description

Technical Field

[0001] The utility model belongs to the technical field of filtering and separating devices, and in particular relates to a tank-type solid-liquid separation device for recrystallizing mother liquor. Background Art

[0002] Chemical companies need to separate the solid and liquid of the mother liquor during the treatment of the recrystallization mother liquor. The solid-liquid separation methods used include centrifugal filtration, plate filter press, natural filtration and other methods. For example, patent No. 202323599918.6 "Solid-Liquid Separation Device" includes a stirring device and a hot gas conveying pipe, and uses the method of falling solid-liquid mixture and countercurrent contact of hot gas to separate solid and liquid. Another example is the patent No. 202323262184.2 "A Solid-Liquid Separation Device", which uses a solid-liquid mixture squeezed by spiral blades, squeezes the solid to the front end of the separation tank, and discharges the liquid to the back side of the separation tank.

[0003] However, the filtration devices in the prior art have the following disadvantages when used in the treatment of mother liquor with high viscosity: (1) The filtration devices in the prior art have the disadvantages of unsatisfactory filtration effect and unsatisfactory solid-liquid encapsulation separation effect. (2) The existing filter press device is cumbersome to operate, the amount of filtration is small at a time, and repeated disassembly and assembly are required. (3) After filtration and centrifugation, the filter cake needs to be dissolved at a certain concentration, and the product solution cannot be directly obtained. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a tank type device which has a simple structure and is convenient to use and is used for solid-liquid separation of recrystallization mother liquor.

[0005] In order to solve the above technical problems, the utility model provides a tank-type solid-liquid separation device for recrystallization mother liquor, comprising a solid-liquid separation tank, a feeding pipe, a water feeding pipe and a connecting pipe are arranged on the top of the solid-liquid separation tank, and a discharge port and a circulating liquid outlet are arranged on the bottom of the solid-liquid separation tank;

[0006] A distribution plate is provided at the upper part of the inner cavity of the solid-liquid separation tank, and the feed pipe, water pipe and connecting pipe all extend into the solid-liquid separation tank, and the outlets of the feed pipe and the connecting pipe are both located below the distribution plate, and the outlet of the water pipe is located above the distribution plate;

[0007] A metal porous baffle is provided at the lower part of the inner cavity of the solid-liquid separation tank;

[0008] The connecting pipe is connected to the circulating liquid outlet after passing through the connecting pipe liquid pump, and the discharge port is respectively connected to the filtrate storage tank and the product storage tank after passing through a tee.

[0009] As an improvement of a tank-type solid-liquid separation device for recrystallization mother liquor of the utility model:

[0010] At least two circles of buckles are arranged around the inner wall of the solid-liquid separation tank, and the metal porous baffle is connected to the solid-liquid separation tank through the buckles.

[0011] As a further improvement of the tank-type solid-liquid separation device of a recrystallization mother liquor of the utility model:

[0012] The buckle is fixedly connected to the solid-liquid separation tank.

[0013] As a further improvement of the tank-type solid-liquid separation device of a recrystallization mother liquor of the utility model:

[0014] The distribution plate is fixedly connected to the inner wall of the solid-liquid separation tank.

[0015] As a further improvement of the tank-type solid-liquid separation device of a recrystallization mother liquor of the utility model:

[0016] The metal porous baffle is provided with a detachable filter cloth.

[0017] As a further improvement of the tank-type solid-liquid separation device of a recrystallization mother liquor of the utility model:

[0018] A vacuum pump is provided outside the filtrate storage tank, and the vacuum pump is connected to the filtrate storage tank.

[0019] As a further improvement of the tank-type solid-liquid separation device of a recrystallization mother liquor of the utility model:

[0020] A second switch valve is provided on the feeding pipe, a first switch valve is provided on the water adding pipe, a third switch valve is provided on the connecting pipe, a fourth switch valve is provided between the discharge port and the tee, a fifth switch valve is provided between the tee and the filtrate storage tank, and a sixth switch valve is provided between the tee and the product storage tank.

[0021] The beneficial effects of the utility model are mainly reflected in:

[0022] The tank-type solid-liquid separation device described in the utility model has a unique design structure, high filtration efficiency, large filtration volume, and no material consumption. Only the filter cloth needs to be replaced regularly, so the filtration cost is very low, and the equipment is easy to operate, maintain, and clean. There is no need to disassemble the device, and the product solution can be directly obtained by adding water to dissolve the filter cake solid. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The specific implementation of the utility model is further described in detail below with reference to the accompanying drawings.

[0024] Figure 1 This is a schematic structural diagram of a tank-type solid-liquid separation device for recrystallizing mother liquor according to the utility model;

[0025] Figure 2 for Figure 1 A schematic diagram of the structure of the metal porous baffle;

[0026] Figure 3 for Figure 1 Schematic diagram of the structure of the distribution disk. DETAILED DESCRIPTION

[0027] The present invention is further described below in conjunction with specific embodiments, but the protection scope of the present invention is not limited thereto:

[0028] Example 1: A tank-type solid-liquid separation device for recrystallizing mother liquor, such as Figure 1-3 As shown, it includes a solid-liquid separation tank 1, a filtrate storage tank 2 and a product storage tank 3.

[0029] The solid-liquid separation tank 1 is a closed container including a tank cover and a tank body, the tank cover and the tank body are sealed and connected, and are made of 316L steel and are installed on the ground through a bracket.

[0030] The bottom of the solid-liquid separation tank 1 is provided with a discharge port 21 and a circulating liquid outlet 22. A feed port, a water port and a connecting pipe port are provided on the tank cover of the solid-liquid separation tank 1. The feed pipe 4, the water pipe 5 and the connecting pipe 6 respectively pass through the feed port, the water port and the connecting pipe port and extend downward into the inner cavity of the solid-liquid separation tank 1 at the lower part. The feed pipe 4 is used to add the solid-liquid mixture to be filtered into the solid-liquid separation tank 1, and the water pipe 5 is used to add deionized hot water used for washing the filter cake into the solid-liquid separation tank 1. The connecting pipe 6 is connected to the circulating liquid outlet 22 after passing through the connecting pipe pump 13, thereby forming a circulating liquid passage. The feed pipe 4 and the feed port, the water pipe 5 and the water port, and the connecting pipe 6 and the connecting pipe port are all sealed to ensure the overall sealing of the interior of the solid-liquid separation tank 1.

[0031] A second switch valve 112 is provided on the feeding pipe 4, a first switch valve 111 is provided on the water adding pipe 5, and a third switch valve 113 is provided on the connecting pipe 6. The first switch valve 111, the second switch valve 112 and the third switch valve 113 are all located outside the solid-liquid separation tank 1, and the third switch valve 113 is located between the connecting pipe mouth and the connecting pipe liquid pump 13.

[0032] A distribution plate 7 is provided at the upper part of the inner cavity of the solid-liquid separation tank 1. The distribution plate 7 adopts a disc-type or tube-type liquid distributor to achieve uniform distribution of the liquid. Figure 3As shown, two through-holes are provided on the distribution plate 7, namely, a feed pipe through-hole 72 and a connecting pipe through-hole 73. After the feed pipe 4 extending into the solid-liquid separation tank 1 passes through the feed pipe through-hole 72, the outlet of the feed pipe 4 is located below the distribution plate 7. Similarly, after the connecting pipe 6 passes through the connecting pipe through-hole 73, the outlet of the connecting pipe 6 is located below the distribution plate 7. The outlet of the water adding pipe 5 extending into the solid-liquid separation tank 1 is located above the distribution plate 7, so that the added solid-liquid mixture and circulating liquid fall directly from the bottom of the distribution plate 7, and the deionized hot water falls after being evenly distributed by the distribution plate 7. The distribution plate 7 is fixedly connected to the inner wall of the solid-liquid separation tank 1 by welding.

[0033] A metal porous baffle 8 is provided at the lower part of the inner cavity of the solid-liquid separation tank 1. Figure 2 As shown, the metal porous baffle 8 is evenly and densely covered with fine through holes 81, and a removable filter cloth 10 is laid on the metal porous baffle 8. The metal porous baffle 8 has reserved screw holes, and the removable filter cloth 10 is fixed to the metal porous baffle 8 by PTFE screws. By replacing the removable filter cloth 10 with different mesh sizes, the solid and liquid can be separated to achieve different filtering effects. At the lower part of the solid-liquid separation tank 1, a circle of buckles 9 is provided around the inner wall of the solid-liquid separation tank 1. The buckles 9 are fixedly connected to the solid-liquid separation tank 1 by screws. After the metal porous baffle 8 is laid flat, the buckles 9 can be snapped into the buckles for a detachable connection, thereby facilitating the removal of the metal porous baffle 8 and the replacement of the removable filter cloth 10. Multiple circles of buckles 9 can be set at different heights around the inner wall of the solid-liquid separation tank 1. By snapping into the buckles 9 at different heights, the height of the metal porous baffle 8 can be adjusted to suit the different amounts of liquid produced after filtration.

[0034] A tee is provided below the discharge port 21, and the discharge port 21 is connected to the inlet of the filtrate storage tank 2 and the inlet of the product storage tank 3 respectively through the tee. A fourth switch valve 114 is provided on the pipeline between the discharge port 21 and the tee, a fifth switch valve 115 is provided on the pipeline between the tee and the filtrate storage tank 2, and a sixth switch valve 116 is provided on the pipeline between the tee and the product storage tank 3, so as to control the connectivity of the passages between the solid-liquid separation tank 1 and the filtrate storage tank 2 and the product storage tank 3 respectively.

[0035] The vacuum pump 12 is connected to the filtrate storage tank 2 through a pipeline. The vacuum pump 12 is connected to the solid-liquid separation tank 1 through the filtrate storage tank 2, the fifth switch valve 115, the three-way valve, and the fourth switch valve 114. After the vacuum pump 12 and the fifth switch valve 115 and the fourth switch valve 114 are turned on, a negative pressure is formed in the filtrate storage tank 2, so that the liquid in the solid-liquid separation tank 1 flows into the filtrate storage tank 2.

[0036] The specific method of using the utility model is as follows:

[0037] 1. Fix the detachable filter cloth 10 on the metal porous baffle 8 by screws, and then insert the metal porous baffle 8 into the buckle 9 of a suitable height according to the amount of liquid to be filtered;

[0038] 2. Close the tank cover, close the first switch valve 111, the third switch valve 113 and the sixth switch valve 116; open the second switch valve 112, the fourth switch valve 114 and the fifth switch valve 115, add the solid-liquid mixture to be filtered from the feeding pipe 4 at the top of the solid-liquid separation tank 1, and the solid-liquid mixture falls on the detachable filter cloth 10. The filtrate falls through the detachable filter cloth 10, and the solid remains on the detachable filter cloth 10 to form a filter cake, thereby achieving preliminary separation of solid and liquid;

[0039] Then, the second switch valve 112 is closed, the vacuum pump 12 is turned on, and the reduced pressure filtration is started, and the filtrate enters the filtrate storage tank 2 through the pipeline;

[0040] 3. When the filter position in the filtrate storage tank 2 does not increase within half an hour, turn off the vacuum pump 12, the fifth switch valve 115, the fourth switch valve 114, and the sixth switch valve 116, and open the first switch valve 111, the third switch valve 113, and the connecting pipe pump 13; then add deionized hot water at a temperature of 70°C from the water inlet 5 at the top of the solid-liquid separation tank 1, and the deionized hot water is dispersed and washed onto the filter cake through the distribution plate 7. Driven by the connecting pipe pump 13, the solution after the deionized hot water partially dissolves the filter cake flows out from the circulating liquid outlet 22 and is transported into the solid-liquid separation tank 1 through the connecting pipe 6, and falls on the filter cake again to continue dissolving the filter cake. After a period of circulation, the filter cake is completely dissolved;

[0041] Then, the fourth switch valve 114 and the sixth switch valve 116 are opened to introduce the solution into the finished product storage tank 3, thereby directly obtaining the product.

[0042] Finally, it should be noted that the above examples are only some specific embodiments of the present invention. Obviously, the present invention is not limited to the above examples, and there are many variations. All variations that can be directly derived or associated with the content disclosed by a person skilled in the art should be considered as the protection scope of the present invention.

Claims

1. A tank-type solid-liquid separation device for recrystallization mother liquor, characterized in that : comprising a solid-liquid separation tank (1), wherein a feeding pipe (4), a water feeding pipe (5) and a connecting pipe (6) are arranged at the top of the solid-liquid separation tank (1), and a discharge port (21) and a circulating liquid outlet (22) are arranged at the bottom of the solid-liquid separation tank (1); A distribution plate (7) is provided at the upper part of the inner cavity of the solid-liquid separation tank (1), the feed pipe (4), the water feed pipe (5) and the connecting pipe (6) all extend into the solid-liquid separation tank (1), and the outlet of the feed pipe (4) and the outlet of the connecting pipe (6) are both located below the distribution plate (7), and the outlet of the water feed pipe (5) is located above the distribution plate (7); A metal porous baffle (8) is provided at the lower part of the inner cavity of the solid-liquid separation tank (1); The connecting pipe (6) is connected to the circulating liquid outlet (22) through the connecting pipe liquid pump (13), and the discharge port (21) is respectively connected to the filtrate storage tank (2) and the product storage tank (3) through a tee.

2. The tank-type solid-liquid separation device for recrystallization mother liquor according to claim 1, characterized in that: At least two circles of buckles (9) are provided around the inner wall of the solid-liquid separation tank (1), and the metal porous baffle (8) is connected to the solid-liquid separation tank (1) via the buckles (9).

3. The tank-type solid-liquid separation device for recrystallization mother liquor according to claim 2, characterized in that: The buckle (9) is fixedly connected to the solid-liquid separation tank (1).

4. The tank-type solid-liquid separation device for recrystallization mother liquor according to claim 3, characterized in that: The distribution plate (7) is fixedly connected to the inner wall of the solid-liquid separation tank (1).

5. The tank-type solid-liquid separation device for recrystallization mother liquor according to claim 4, characterized in that: A detachable filter cloth (10) is laid on the metal porous baffle (8).

6. The tank-type solid-liquid separation device for recrystallization mother liquor according to claim 5, characterized in that: The filtrate storage tank (2) is provided with a vacuum pump (12) outside the filtrate storage tank (2), and the vacuum pump (12) is connected to the filtrate storage tank (2).

7. The tank-type solid-liquid separation device for recrystallization mother liquor according to claim 6, characterized in that: The feed pipe (4) is provided with a second switch valve (112), the water feed pipe (5) is provided with a first switch valve (111), the connecting pipe (6) is provided with a third switch valve (113), a fourth switch valve (114) is provided between the discharge port (21) and the tee, a fifth switch valve (115) is provided between the tee and the filtrate storage tank (2), and a sixth switch valve (116) is provided between the tee and the product storage tank (3).

Images