CN212854732U - Solid-liquid separation device for refining plasticizer - Google Patents

Abstract

The utility model relates to a solid-liquid separation equipment for refining plasticizer, including reation kettle, reation kettle's bottom be provided with the outlet pipe, reation kettle's top be provided with liquid inlet pipe and active carbon particle import pipe, the last agitating unit that heats that is provided with of reation kettle, one side of reation kettle is provided with the hydrocyclone separator, the hydrocyclone separator includes liquid entrance point and clear liquid outlet end, be linked together through first liquid conveyer pipe between the liquid entrance point of hydrocyclone separator and the outlet pipe, the below of hydrocyclone separator is provided with the pressure filter, is linked together through second liquid conveyer pipe between the clear liquid outlet end of hydrocyclone separator and the pressure filter. The content of the activated carbon particles contained in the decolored crude ester is reduced through the suspension separator, the load of the filter press is reduced, the times of shutdown maintenance of the filter press are reduced, and therefore the production efficiency is improved. The utility model discloses adjust, convenient to use, have extensive market prospect.

Description

Solid-liquid separation device for refining plasticizer

Technical Field

The utility model relates to a solid-liquid separation field, concretely relates to solid-liquid separation equipment for refined plasticizer.

Background

The production process of the plasticizer dibutyl phthalate (DBP) comprises the following steps: consists of four production units of esterification reaction, neutralization and washing, dealcoholization, refining and filter pressing. The crude ester obtained after the existing dealcoholization is turbid oily liquid, a proper amount of adsorbents such as active carbon and the like are added into the crude ester, the crude ester is heated and stirred for refining, and the materials pass through a plate type closed filter press by taking a pump as power to remove the adsorbents and other impurities in the ester to obtain colorless transparent oily liquid, namely a finished product. The crude ester with color greater than or equal to 60# needs refining, and is decolorized and refined by utilizing the adsorbability of substances such as active carbon, argil, diatomite and the like, so that the crude ester meets the national standard and internal control indexes. The dosage of the adsorbent is very small, and is determined according to the color of the crude ester, and the dosage is generally 0.02-0.1%.

After decolorization is performed by using substances such as activated carbon or diatomite, the activated carbon or diatomite for adsorption decolorization in crude ester is usually required to be filtered and removed by using a filter press, the filter press is operated under a high-load condition for a long time, so that the filter press needs to be frequently backwashed and filter cloth is required to be replaced, the filter press needs to be stopped during replacement of the filter cloth, and the production efficiency is reduced.

Disclosure of Invention

The utility model provides a to prior art not enough, the utility model provides a can reduce the solid content of the active carbon or diatomaceous earth that contain in the coarse ester decoloration back coarse ester to reduce the load of pressure filter, be used for refined plasticizer solid-liquid separation's device, be arranged in overcoming prior art defect.

The utility model adopts the technical proposal that: the utility model provides a solid-liquid separation equipment for refining plasticizer, includes reation kettle, reation kettle's bottom be provided with the outlet pipe, reation kettle's top be provided with liquid inlet pipe and active carbon particle import pipe, the last agitating unit that heats that is provided with of reation kettle, one side of reation kettle is provided with the hydrocyclone, the hydrocyclone includes liquid entrance point and clear liquid outlet end, is linked together through first liquid conveyer pipe between the liquid entrance point of hydrocyclone and the outlet pipe, the below of hydrocyclone is provided with the pressure filter, is linked together through second liquid conveyer pipe between the clear liquid outlet end of hydrocyclone and the pressure filter.

Preferably, the stirring device that heats include heating coil, heating coil installs in reation kettle, and the cover is equipped with the (mixing) shaft on the reation kettle, is provided with stirring vane on the inboard (mixing) shaft of reation kettle, and reation kettle's top is provided with agitator motor, agitator motor's output and (mixing) shaft transmission are connected.

Preferably, the second liquid conveying pipe on be provided with first buffer tank, the suspension separator still include turbid liquid outlet end, the second liquid conveying pipe of turbid liquid outlet end and first buffer tank top of suspension separator is linked together through third liquid conveying pipeline, be provided with centrifuge on the third liquid conveying pipe.

Preferably, the first liquid delivery pipe is provided with a first stop valve and a first liquid delivery pump in sequence.

Preferably, an electronic temperature probe is arranged in the reaction kettle.

Preferably, the first buffer tank is positioned between the suspension separator and the filter press, and a second liquid conveying pump is arranged on a second liquid conveying pipe between the first buffer tank and the filter press.

Preferably, a second buffer tank is arranged on a third liquid conveying pipeline between a turbid liquid outlet end of the suspension separator and the centrifuge, a second stop valve is arranged on the third liquid conveying pipeline between the second buffer tank and the centrifuge, the centrifuge is positioned between the first buffer tank and the suspension separator, and the second buffer tank is positioned between the suspension separator and the centrifuge.

Preferably, reation kettle, first buffer tank and second buffer tank equally divide and be provided with the level gauge respectively.

The utility model has the advantages that: firstly, the utility model discloses a reduced through the suspension separator the coarse ester after the decoloration in the content of the active carbon granule that contains, reduced the load of pressure filter, and then reduced the number of times that the pressure filter shut down and maintained to production efficiency has been improved. Secondly, the utility model discloses a set up centrifuge and carry out solid-liquid separation with the turbid liquid that the suspension separator separates, further improvement the rate of recovery of coarse ester after the decoloration. Finally, first buffer tank be located between suspension separator and the pressure filter, centrifuge is located between first buffer tank and the suspension separator, the second buffer tank is located between suspension separator and the centrifuge, such equipment location sets up and is convenient for liquid utilizes gravity to carry out the material and shifts, has reduced energy consumption.

The utility model has the advantages of simple structure, convenient operation, design benefit has improved work efficiency greatly, has fine social and economic benefits, is the product of easily using widely.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a partially enlarged schematic view of detail a of fig. 1.

Detailed Description

As shown in figures 1 and 2, the solid-liquid separation device for refining the plasticizer comprises a reaction kettle 1, wherein an outlet pipe 2 is arranged at the bottom of the reaction kettle 1, a liquid inlet pipe 3 and an activated carbon particle inlet pipe 4 are arranged at the top of the reaction kettle 1, an electronic temperature probe 19 is arranged in the reaction kettle 1, and the electronic temperature probe 19 is fixedly connected with the inner wall of the reaction kettle 1. Be provided with the agitating unit that heats on reation kettle 1, the agitating unit that heats include heating coil 9, heating coil 9 installs in reation kettle 1, heating coil 9 and 1 inner wall fixed connection of reation kettle, reation kettle 1 is gone up the cover and is equipped with (mixing) shaft 10, rotary motion's round rod-shaped structure can be done around (mixing) shaft 10 axis to the (mixing) shaft 10 adoption, be provided with stirring vane 11 on the (mixing) shaft 10 of reation kettle 1 inboard, reation kettle 1's top is provided with agitator motor 12, agitator motor 12's output and (mixing) shaft 10 pass through shaft coupling or speed reducer transmission and connect. One side of reaction kettle 1 is provided with a suspension separator 5, suspension separator 5 comprises a liquid inlet end and a clear liquid outlet end, the liquid inlet end of suspension separator 5 is communicated with outlet pipe 2 through a first liquid conveying pipe 6, and first stop valve 16 and a first liquid conveying pump 17 are sequentially arranged on first liquid conveying pipe 6. A filter press 7 is arranged below the suspension separator 5, and the clear liquid outlet end of the suspension separator 5 is communicated with the filter press 7 through a second liquid conveying pipe 8.

For further improvement decolored crude ester's rate of recovery, this product is in second liquid conveyer pipe 8 on be provided with first buffer tank 13, suspension separator 5 still include turbid liquid outlet end, suspension separator 5's turbid liquid outlet end and the second liquid conveyer pipe 8 of first buffer tank 13 top are linked together through third liquid conveying pipeline 15, are provided with centrifuge 14 on the third liquid conveying pipeline 15. The first buffer tank 13 is positioned between the suspension separator 5 and the filter press 7, and a second liquid conveying pump 20 is arranged on the second liquid conveying pipe 8 between the first buffer tank 13 and the filter press 7. A second buffer tank 21 is arranged on a third liquid conveying pipeline 15 between the turbid liquid outlet end of the suspension separator 5 and the centrifuge 14, a second stop valve 22 is arranged on the third liquid conveying pipeline 15 between the second buffer tank 21 and the centrifuge 14, the centrifuge 14 is positioned between the first buffer tank 13 and the suspension separator 5, and the second buffer tank 21 is positioned between the suspension separator 5 and the centrifuge 14. Centrifuge 14 includes a liquid inlet end, a liquid outlet end, and a solids outlet end.

In order to observe the liquid level height conveniently, the liquid level meters 18 are respectively arranged on the reaction kettle 1, the first buffer tank 13 and the second buffer tank 21.

The use method of the product is as follows: as shown in FIGS. 1 and 2, firstly, a predetermined weight of crude ester to be decolorized is fed into the reaction kettle 1 through the liquid inlet pipe 3, the feeding of the crude ester to be decolorized into the reaction kettle 1 is stopped after the crude ester to be decolorized reaches a predetermined liquid level by observing the liquid level meter 18, and the preparation work before decolorization is completed after a predetermined weight of activated carbon particles is fed into the reaction kettle 1 through the activated carbon particle inlet pipe 4.

After the preparation work before decoloring is completed, firstly, the stirring motor 12 is turned on, and the stirring motor 12 drives the stirring shaft 10 to rotate so as to drive the stirring blades 11 to move, so that the crude ester to be decolored and the activated carbon particles in the reaction kettle 1 are driven to be uniformly mixed. Then, the heating coil 9 is opened, the heating coil 9 heats the crude ester to be decolorized and the activated carbon particles, when the value fed back by the electronic temperature probe 19 reaches a predetermined temperature, the predetermined temperature is 60-90 ℃, the heating coil 9 is closed, and when the stirring reaches a predetermined time, the stirring motor 12 is closed, so that a mixture of the decolorized crude ester and the activated carbon particles is obtained. Then correspondingly opening a first stop valve 16, a first liquid delivery pump 17 and the suspension separator 5, wherein after the decolored crude ester and the activated carbon particles pass through the suspension separator 5, a part of the decolored crude ester enters the first buffer tank 13 through a clear liquid outlet end of the suspension separator 5 and a second liquid delivery pipe 8; the other part of the decolored crude ester carries the activated carbon particles to enter the centrifuge 14 through a turbid liquid outlet end of the suspension separator 5 and the second buffer tank 21, then the centrifuge 14 is opened, the other part of the decolored crude ester enters the first buffer tank 13 through a liquid outlet end of the centrifuge 14, and the activated carbon particles are discharged through a solid outlet end of the centrifuge 14.

And finally, driving a second liquid conveying pump 20 to convey the decolored crude ester in the first buffer tank 13 to a filter press 7, and further filtering a small amount of activated carbon particles carried by the decolored crude ester by the filter press 7 to obtain a decolored finished product without the activated carbon particles.

By the embodiment, the content of the activated carbon particles contained in the decolored crude ester is reduced through the suspension separator 5, the load of the filter press 7 is reduced, the shutdown maintenance frequency of the filter press 7 is reduced, and the production efficiency is improved. In addition, the solid-liquid separation of the turbid liquid separated by the suspension separator 5 by the centrifuge 14 further improves the recovery rate of the decolorized crude ester.

The utility model discloses a satisfy in a solid-liquid separation field worker needs a solid-liquid separation equipment for refining plasticizer, make the utility model discloses extensive market prospect has.

Claims (8)

1. A solid-liquid separation equipment for refining plasticizer which is characterized in that: including reation kettle (1), the bottom of reation kettle (1) be provided with outlet pipe (2), the top of reation kettle (1) be provided with liquid import pipe (3) and active carbon particle import pipe (4), reation kettle (1) is last to be provided with the agitating unit that heats, one side of reation kettle (1) is provided with the hydrocyclone separator (5), hydrocyclone separator (5) are including liquid entrance point and clear liquid exit end, be linked together through first liquid conveyer pipe (6) between the liquid entrance point of hydrocyclone separator (5) and outlet pipe (2), the below of hydrocyclone separator (5) is provided with pressure filter (7), be linked together through second liquid conveyer pipe (8) between the clear liquid exit end of hydrocyclone separator (5) and pressure filter (7).

2. The solid-liquid separation apparatus according to claim 1, characterized in that: the heating and stirring device comprises a heating coil (9), wherein the heating coil (9) is installed in a reaction kettle (1), the reaction kettle (1) is sleeved with a stirring shaft (10), stirring blades (11) are arranged on the stirring shaft (10) on the inner side of the reaction kettle (1), a stirring motor (12) is arranged above the reaction kettle (1), and the output end of the stirring motor (12) is in transmission connection with the stirring shaft (10).

3. The solid-liquid separation apparatus according to claim 1, characterized in that: second liquid conveyer pipe (8) on be provided with first buffer tank (13), suspension separator (5) still include the turbid liquid exit end, the turbid liquid exit end of suspension separator (5) and second liquid conveyer pipe (8) of first buffer tank (13) top are linked together through third liquid conveying pipeline (15), are provided with centrifuge (14) on third liquid conveying pipeline (15).

4. The solid-liquid separation apparatus according to claim 1, characterized in that: the first liquid conveying pipe (6) is sequentially provided with a first stop valve (16) and a first liquid conveying pump (17).

5. The solid-liquid separation apparatus according to claim 1, characterized in that: an electronic temperature probe (19) is arranged in the reaction kettle (1).

6. The solid-liquid separation apparatus according to claim 3, characterized in that: the first buffer tank (13) is positioned between the suspension separator (5) and the filter press (7), and a second liquid conveying pump (20) is arranged on a second liquid conveying pipe (8) between the first buffer tank (13) and the filter press (7).

7. The solid-liquid separation apparatus according to claim 3, characterized in that: the centrifugal separator is characterized in that a second buffer tank (21) is arranged on a third liquid conveying pipeline (15) between a turbid liquid outlet end of the suspension separator (5) and the centrifugal machine (14), a second stop valve (22) is arranged on the third liquid conveying pipeline (15) between the second buffer tank (21) and the centrifugal machine (14), the centrifugal machine (14) is located between the first buffer tank (13) and the suspension separator (5), and the second buffer tank (21) is located between the suspension separator (5) and the centrifugal machine (14).

8. The solid-liquid separation apparatus according to claim 7, characterized in that: the reaction kettle (1), the first buffer tank (13) and the second buffer tank (21) are respectively provided with a liquid level meter (18).

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