CN116407878A - A separation device for liquid containing polypropylene particles - Google Patents

Abstract

The invention relates to a separation device for liquid containing polypropylene particles, which comprises: the liquid storage tank is internally provided with a baffle, the height of the baffle is smaller than that of the liquid storage tank, and the liquid storage tank is separated into a water purifying chamber and a dust-containing water chamber; the dust-containing water chamber is provided with a dust-containing water outlet below, and the water purifying chamber is provided with a first purified water outlet below. The fluid filtration is realized by utilizing the characteristic that the density of impurities such as dust and the like contained in the process fluid is smaller than that of the process fluid and floats on the surface of the fluid.

Description

A separation device for liquid containing polypropylene particles

technical field

The invention relates to the technical field of solid-liquid separation in the polyolefin industry, in particular to a separation device for a liquid containing polypropylene particles.

Background technique

A large amount of fine powder will be produced during the underwater granulation of polypropylene. The fine powder enters the granulation water and circulates in the system with the granulation water. In order to prevent the accumulation of fine powder in the system and affect the normal operation of downstream equipment such as coolers, it is necessary Before entering the cooler, a filter device is added to remove the subdivided filter. Varicose sieves are generally used as separation devices in China. This device is used for one opening and one standby. It occupies a large area, and the screen needs to be cleaned and replaced regularly.

Contents of the invention

The object of the present invention is to provide a separation device for liquid containing polypropylene particles, so as to solve the problems in the prior art that the equipment occupies a large area, requires regular maintenance and is inconvenient to operate.

In order to achieve the above object, the present invention provides a separation device for liquid containing polypropylene particles, comprising: a liquid storage tank, a partition is arranged in the liquid storage tank, the height of the partition is smaller than the height of the liquid storage tank, and the The liquid storage tank is separated into a clean water chamber and a dusty water chamber; a dusty water outlet is provided below the dusty water chamber, and a first clean water outlet is provided below the clean water chamber.

The separation device for liquid containing polypropylene particles according to the present invention, wherein a heat exchanger is further arranged under the water purification chamber, and the water purification chamber and the heat exchanger are connected through a downcomer.

The separation device for liquid containing polypropylene particles according to the present invention, wherein, a down tube box is arranged below the heat exchanger.

The separation device for liquid containing polypropylene particles according to the present invention, wherein the dust-containing water chamber is provided with two liquid level gauges, upper and lower, and the dust-containing water outlet is connected with a dust-containing water drainage pipeline, and the dust-containing water is drained There is a valve on the pipeline.

The separation device for liquid containing polypropylene particles according to the present invention, wherein liquid level gauges are arranged on the clean water chamber and the downcomer.

The device for separating liquid containing polypropylene particles according to the present invention, wherein the liquid storage tank is provided with an upper head, and the upper head is provided with an inlet for dusty water at a position corresponding to the water purification chamber.

The separation device for liquid containing polypropylene particles according to the present invention, wherein the heat exchanger is a shell-and-tube heat exchanger, and the shell side is provided with a heat exchange medium inlet, a heat exchange medium outlet, a clean outlet and a vent.

The beneficial effects of the present invention are:

The density of dust and other impurities contained in the process fluid is lower than that of the process fluid, and the characteristics of floating on the surface of the fluid are used to realize fluid filtration. A heat exchanger is installed under the clean water chamber, and filtration cooling or filtration heating can also be completed in one device.

Description of drawings

Fig. 1 is the structural representation of the separation device containing polypropylene particle liquid of the present invention;

Fig. 2 is the process flow diagram of the integrated technology of polypropylene particle filtration and cooling in the present invention;

Fig. 3 is a process flow chart of the integrated technology of filtering and heating polypropylene particles according to the present invention.

Among them, reference signs:

1 liquid storage tank;

2 partitions;

3 clean water room;

4 dusty water chamber;

5 outlet of dusty water;

6 heat exchangers;

7 downcomer;

8 down tube box;

9 the second clean water outlet;

10 thermometer interface;

11-1, 11-2, 11-3 11-4 Liquid level gauge;

12 Dusty water drainage pipeline;

13 upper head;

14 Inlet for dusty water;

15 Heat exchange medium inlet and outlet 1;

16 Heat exchange medium inlet and outlet 2;

17 drain port;

18 vents;

19 transfer pump;

20 lugs.

Detailed ways

The present invention is specifically described below by way of examples. It is necessary to point out that the following examples are only used to further illustrate the present invention, and cannot be interpreted as limiting the protection scope of the present invention. Those skilled in the art can make some non-essential improvements and improvements to the present invention according to the above-mentioned content of the present invention. Adjustment.

Please refer to Fig. 1, a kind of separating device that contains polypropylene particle liquid according to the present invention, comprises: liquid storage tank 1, is provided with dividing plate 2 in described liquid storing tank 1, and described dividing plate 2 divides liquid storing tank 1 is separated into a clean water chamber 3 and a dusty water chamber 4; a dusty water outlet 5 is provided below the dusty water chamber 4, and a first clean water outlet is provided below the water purification chamber 3.

The height of the partition 2 is smaller than the height of the liquid storage tank 1, so that the adjacent clean water chamber 3 and the top of the dust-containing water chamber 4 communicate. The density of polypropylene particles in the medium is smaller than that of the liquid, and the polypropylene particles float on the surface of the liquid. When the liquid level gradually rises to the height of the partition 2, the liquid containing polypropylene particles in the upper layer will flow into the dust-containing water chamber 4, thereby realizing the separation of polypropylene particles into the dust-containing water chamber 4. For the separation of particles and liquid, the concentrated polypropylene particle waste liquid in the dusty water chamber 4 can be discharged through the dusty water outlet 5, and the liquid from which the polypropylene particles are removed is discharged through the first clean water outlet.

As a preferred embodiment, a heat exchanger 6 is further provided below the water purification chamber 3 , and the water purification chamber 3 and the heat exchanger 6 are connected through a downcomer 7 . The downcomer 7 should have a certain height, thereby increasing the buoyancy of the fine powder, and preventing the fine powder from being brought into the heat exchanger when the fluid enters the clean water chamber.

As a preferred embodiment, a lower tube box 8 is provided below the heat exchanger 6 , and a second clean water outlet 9 and a thermometer interface 10 are provided on the lower tube box 8 . The thermometer interface 10 can be equipped with a temperature detection instrument, and the temperature of the purified water can be maintained to meet the process requirements through the regulating valve on the control pipeline

Please refer to Fig. 1 and Fig. 2 at the same time. As a preferred embodiment, the dusty water chamber 4 is provided with upper and lower liquid level gauges 11-1 and 11-2, and the dusty water outlet 5 is connected with a dusty water The water drainage pipeline 12 is provided with a valve on the dusty water drainage pipeline 12. When the accumulation of dusty water in the dusty water chamber 4 reaches a high liquid level, the two-position valve on the dusty water drainage pipeline 12 of the locked drain is opened, and the dusty water is discharged from the equipment; when the water level reaches a low level, the locked drain is connected The two-position valve on the dust water drain line 12 is closed.

As a preferred embodiment, liquid level gauges 11-3 and 11-4 are respectively provided on the water purification chamber 3 and the downcomer 7. Keep the water level in the liquid storage tank 1 at a normal liquid level by controlling the liquid level gauge 11-3 on the clean water chamber 3 to control the regulating valve on the clean water discharge pipeline.

As a preferred embodiment, the liquid storage tank 1 is provided with an upper head 13 , and the upper head 13 is provided with a dusty water inlet 14 at a position corresponding to the clean water chamber 3 .

Please refer to Fig. 1, Fig. 2 and Fig. 3 at the same time. As a preferred embodiment, the heat exchanger 6 is a shell-and-tube heat exchanger, and the shell side is provided with a heat exchange medium inlet and outlet 15, a heat exchange medium inlet and outlet 16, Drain port 17 and vent port 18. The water in the clean water chamber 3 flows through the tube side of the heat exchanger 6 from top to bottom to exchange heat to the required temperature, and then discharges to the water point by self-flowing with a high head difference or sent to the water point by the transfer pump 19 as required. The heat exchange medium can be a cooling medium, such as circulating cooling water, low-temperature water, frozen brine, etc., or a heating medium, such as hot water, steam, etc., for heating and purifying water. During heat exchange, if the heat exchange medium is a cooling medium, the heat exchange medium enters the heat exchanger 6 from the heat exchange medium inlet and outlet 15, and flows out of the heat exchanger 6 from the heat exchange medium inlet and outlet 16; if the heat transfer medium is a heating medium, Then the heat exchange medium enters the heat exchanger 6 from the second heat exchange medium inlet and outlet 16, and flows out of the heat exchanger 6 from the first heat exchange medium inlet and outlet 15; the delivery pump 19 can be centrifugal, positive displacement or other pumps.

As a preferred embodiment, lugs 20 may also be provided on the side wall of the liquid storage tank for fixing the separation device.

Certainly, the present invention also can have other multiple embodiments, without departing from the spirit and essence of the present invention, those skilled in the art can make various corresponding changes and deformations according to the present invention, but these corresponding changes All changes and modifications should belong to the protection scope of the claims of the present invention.

Claims (7)

1. A separator for a polypropylene-containing particulate liquid, comprising: the liquid storage tank is internally provided with a baffle, the height of the baffle is smaller than that of the liquid storage tank, and the liquid storage tank is separated into a water purifying chamber and a dust-containing water chamber; the dust-containing water chamber is provided with a dust-containing water outlet below, and the water purifying chamber is provided with a first purified water outlet below.

2. The polypropylene particle-containing liquid separation device according to claim 1, wherein a heat exchanger is further provided below the clean water chamber, and the clean water chamber and the heat exchanger are connected through a downcomer.

3. The separation device of polypropylene-containing granular liquid according to claim 2, wherein a down tube box is provided below the heat exchanger.

4. The device for separating liquid containing polypropylene particles according to claim 1, wherein the dust-containing water chamber is provided with an upper liquid level meter and a lower liquid level meter, the dust-containing water outlet is connected with a dust-containing water drain line, and the dust-containing water drain line is provided with a valve.

5. The polypropylene particle-containing liquid separation device of claim 1, wherein the water purification chamber and the downcomer are provided with liquid level gauges.

6. The separation device of polypropylene-containing granular liquid according to claim 1, wherein an upper head is provided on the liquid storage tank, and a dust-containing water inlet is provided on the upper head at a position corresponding to the clean water chamber.

7. The separator of claim 2, wherein the heat exchanger is a shell-and-tube heat exchanger, and the shell side is provided with a heat exchange medium inlet, a heat exchange medium outlet, a purge port and a vent port.

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