Water washing neutralization kettle for chlorinated polyethylene

Abstract

The utility model discloses a washing neutralization kettle for chlorinated polyethylene. The washing neutralization kettle comprises a kettle body and a stirring device, wherein the kettle body is provided with an inner cavity; the stirring device extends into the inner cavity from the top of the kettle body; a layer of full-kettle type filter plate is arranged in the kettle body, filter holes are formed in the full-kettle type filter plate, and an inner cavity of the kettle body is divided into a washing neutralization cavity on the inner side and a drainage cavity on the outer side by the full-kettle type filter plate; the stirring device is located in the washing neutralization cavity, the top of the kettle body is provided with a feed port leading to the washing neutralization cavity and a backwash water inlet leading to the drainage cavity, and the bottom of the kettle body is provided with a discharge port leading to the washing neutralization cavity and a drainage port leading to the drainage cavity. According to the utility model, a full-kettle type filtering mode is adopted, so that the filtering area can be well increased, the filtering efficiency is improved, and meanwhile, the product quality is ensured. And the filter plate is cleaned in a back-flushing manner, so that automatic operation is conveniently realized, and the workload of manual cleaning is reduced.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of neutralization kettle, specifically relates to a water washing neutralization kettle for chlorinated polyethylene. BACKGROUND

[0002] In the chlorinated polyethylene (CPE) production field, the neutralization kettle is a common equipment, mainly used for water washing and neutralization treatment of chlorinated polyethylene slurry to reach the discharge standard. The filter screen is an important component of the neutralization kettle, which is used to filter the water in the neutralized material.

[0003] At present, the filter screen in the neutralization kettle usually adopts the filter core type design, and the water and soluble salt after neutralization are filtered out through the filter screen. However, this design has some problems. First, since the filter screen is of the filter core type, the filtering area is small, and the CPE material will adhere to the filter screen to block the filter screen, which not only reduces the filtering efficiency, but also causes a large amount of salt generated by neutralization to remain in the material due to insufficient filtration, thereby affecting the quality of the product. Secondly, if the filter screen is blocked for a long time, manual cleaning is required, which not only increases the workload, but also seriously affects the production efficiency. SUMMARY

[0004] The technical problem to be solved by the utility model is to provide a water washing neutralization kettle for chlorinated polyethylene, which is beneficial to improve the filtering efficiency and reduce the workload of manual cleaning of the filter screen.

[0005] To solve the above technical problems, the technical scheme of the utility model is as follows: a water washing neutralization kettle for chlorinated polyethylene, comprising a kettle body provided with an inner cavity and a stirring device extending into the inner cavity from the top of the kettle body; a full-kettle type filter plate is arranged in the kettle body, the full-kettle type filter plate is provided with filter holes, and the inner cavity of the kettle body is divided into a water washing and neutralization cavity on the inner side and a drainage cavity on the outer side by the full-kettle type filter plate; the stirring device is located in the water washing and neutralization cavity, the top of the kettle body is provided with a feeding port opening into the water washing and neutralization cavity and a backflushing water inlet opening into the drainage cavity, and the bottom of the kettle body is provided with a discharging port opening into the water washing and neutralization cavity and a drainage port opening into the drainage cavity.

[0006] As a preferred technical scheme, the full-kettle type filter plate comprises a vertical plate body on the circumferential side and a spherical plate body on the bottom, the vertical plate body and the spherical plate body are respectively provided with filter holes, and the filter holes on the vertical plate body are inclined holes inclined downward from outside to inside.

[0007] As a preferred technical scheme, the inclination angle of the inclined hole is 30-60°.

[0008] As a preferred technical scheme, a jacket is arranged on the outer wall of the kettle body, and the jacket is provided with a jacket water inlet and a jacket water outlet.

[0009] As a preferred technical scheme, the drainage port is provided with a flow sensor.

[0010] As a preferred technical scheme, the kettle body is provided with a pressure difference sensor for detecting the pressure difference between the water washing and neutralizing cavity and the drainage cavity.

[0011] Compared with the prior art, the utility model has at least the following beneficial effects:

[0012] (1) By adopting the full-kettle type filtering mode, the filtering area can be well increased, and the filtering efficiency can be improved; compared with the filter core type filter screen in the prior art, the full-kettle type filter plate can effectively prevent CPE material from adhering, and the filtering efficiency is greatly improved.

[0013] (2) The structure design is ingenious, the filter plate can be cleaned regularly or as required by adopting the backflushing mode, the blockage of the filter plate can be effectively avoided, thereby the workload of manually cleaning the filter screen is reduced, the production efficiency is improved, and the labor intensity of workers is reduced.

[0014] (3) The filter plate can effectively filter the neutralized water and soluble salt, thereby the product quality is ensured, and the production demand of high-quality products can be met.

[0015] (4) By adopting the backflushing mode to clean the filter plate, the automatic operation can be realized, the automation degree of the equipment is greatly improved, and the production efficiency is further improved. BRIEF DESCRIPTION OF DRAWINGS

[0016] The following drawings only aim to schematically illustrate and explain the utility model, and do not limit the range of the utility model. Among them:

[0017] Figure 1 is a structural schematic view of the utility model embodiment;

[0018] Figure 2 is a partial structural schematic view of the full-kettle type filter plate.

[0019] In the drawing: 10-kettle body; 11-water washing and neutralizing cavity; 12-drainage cavity; 13-feeding port; 14-backflushing water inlet; 15-discharging port; 16-drainage port; 17-jacket; 18-jacket water inlet; 19-jacket water outlet; 20-stirring device; 30-full-kettle type filter plate; 31-vertical plate body; 32-spherical plate body; 33-filter hole. DETAILED DESCRIPTION

[0020] The utility model is further described below in conjunction with the drawings and examples. In the following detailed description, certain exemplary embodiments of the utility model are described by way of illustration only. It is needless to say that those skilled in the art can realize that the described embodiments can be modified in various ways without departing from the spirit and scope of the utility model. Therefore, the drawings and description are illustrative in nature and are not used to limit the protection scope of the claims.

[0021] As Figure 1 And Figure 2 As shown in the figure, the chlorinated polyethylene is washed in the neutralization kettle with water, which comprises a kettle body 10 provided with an inner cavity and a stirring device 20 extending into the inner cavity from the top of the kettle body 10, and the kettle body is made of corrosion-resistant stainless steel or enamel glass; a full-kettle filter plate 30 is arranged in the kettle body 10, and the full-kettle filter plate 30 has a certain gap with the kettle wall, so that the inner cavity of the kettle body 10 is divided into an inner water washing and neutralization cavity 11 and an outer drainage cavity 12 by the full-kettle filter plate 30, and the stirring device 20 is located in the water washing and neutralization cavity 11; the full-kettle filter plate 30 is provided with a filter hole 33 with a diameter of 0.2 mm, which is used to filter out the water in the neutralized CPE slurry; the top of the kettle body 10 is provided with a feed inlet 13 leading to the water washing and neutralization cavity 11 and a backflushing water inlet 14 leading to the drainage cavity 12, and the bottom of the kettle body 10 is provided with a discharge outlet 15 leading to the water washing and neutralization cavity 11 and a drainage outlet 16 leading to the drainage cavity 12. In order to facilitate the control of the material temperature during water washing and neutralization, a jacket 17 is arranged on the outer wall of the kettle body 10, and the jacket 17 is provided with a jacket water inlet 18 and a jacket water outlet 19.

[0022] During water washing, the CPE slurry and the water washing alkali solution are added into the water washing and neutralization cavity 11 of the kettle body 10 from the feed inlet 13, and the CPE slurry and the water washing alkali solution are subjected to neutralization reaction in the water washing and neutralization cavity 11, and the water and the soluble salt in the neutralized CPE slurry are filtered out by the full-kettle filter plate 30 and discharged outside through the drainage outlet 16; in this way, the full-kettle filtration mode can well increase the filtration area and greatly improve the filtration efficiency while ensuring the quality of the product.

[0023] When the full-kettle filter plate 30 needs to be cleaned due to blockage, the drainage outlet 16 can be closed, and then backflushing water is injected through the backflushing water inlet 14 to backflush and clean the filter plate, which can greatly improve the work efficiency. Considering that the temperature of the backflushing water may affect the quality of the product, the temperature of the backflushing water is controlled between a certain temperature during design, generally between 30-60 degrees, which is basically the same as the temperature of the CPE slurry, so as to ensure that the material attached to the filter plate can be removed without any negative impact on the product.

[0024] Considering the water source problem of backwashing water, the backwashing water system can be composed of a water pump and a water pipe with a diameter of 50 mm, and the power of the water pump is 1 kW, which is used to provide the water source required by the backwashing filter plate to ensure the normal operation of the backwashing water pressure.

[0025] Reference Figure 1 And Figure 2 In this embodiment, the shape of the full-kettle filter plate 30 is adapted to the contour shape of the kettle body 10, including a vertical plate body 31 on the circumference and a spherical plate body 32 at the bottom, and the vertical plate body 31 and the spherical plate body 32 are respectively provided with filter holes 33, the filter holes 33 on the vertical plate body 31 are inclined holes inclined downward from outside to inside, and the inclination angle θ of the inclined holes is preferably 30-60°, which can effectively prevent CPE material from adhering to the filter plate, and also facilitates backwashing cleaning.

[0026] In order to realize automatic control, an automatic control system can be designed. The system is composed of a controller, a differential pressure sensor and a flow sensor. The differential pressure sensor is installed on both sides of the filter plate, and the flow sensor is installed at the drain outlet to detect the blockage of the filter plate. When the detected pressure difference exceeds the set value (for example, 0.5 MPa) or the flow is lower than the set value (for example, 1 cubic meter / hour), the controller will automatically control the start of the backwashing function to remove the material adhering to the filter plate.

[0027] In summary, by adopting the full-kettle filtering mode, the filtering area can be well increased, the filtering efficiency can be improved, and the product quality can be ensured. Compared with the filter core type filter screen in the prior art, the full-kettle filter plate can effectively prevent CPE material from adhering, and by using the backwashing mode to clean the filter plate, automatic operation is facilitated, the production automation degree is greatly improved, and the workload of manual cleaning is reduced.

[0028] The above description is only a specific embodiment of the utility model, and is not used to limit the scope of the utility model. Any equivalent changes and modifications made by any person skilled in the art without departing from the concept and principles of the utility model shall fall within the scope of protection of the utility model.

Claims

1. A water-washing neutralization vessel for chlorinated polyethylene, comprising a vessel body with an inner cavity and a stirring device extending from the top of the vessel body into the inner cavity; characterized in that: The kettle body is internally provided with a full-kettle filter plate, the full-kettle filter plate is provided with filter holes, and the internal cavity of the kettle body is divided into a water washing and neutralizing cavity on the inner side and a drainage cavity on the outer side by the full-kettle filter plate; the stirring device is located in the water washing and neutralizing cavity, the top of the kettle body is provided with a feeding port leading to the water washing and neutralizing cavity and a backflushing water inlet leading to the drainage cavity, and the bottom of the kettle body is provided with a discharging port leading to the water washing and neutralizing cavity and a drainage port leading to the drainage cavity.

2. The water scrubbing neutralizer for chlorinated polyethylene as claimed in claim 1, wherein: The full-kettle filter plate comprises a vertical plate body on the circumferential side and a spherical plate body on the bottom, the vertical plate body and the spherical plate body are respectively provided with filter holes, and the filter holes on the vertical plate body are inclined holes inclined downward from the outside to the inside.

3. The water scrubbing neutralizer for chlorinated polyethylene as claimed in claim 2, wherein: The inclination angle of the inclined holes is 30-60°.

4. The water scrubbing neutralizer for chlorinated polyethylene as claimed in claim 1, wherein: The outer wall of the kettle body is provided with a jacket, and the jacket is provided with a jacket water inlet and a jacket water outlet.

5. The water scrubbing neutralizer for chlorinated polyethylene as claimed in any one of claims 1 to 4, wherein: The drainage port is provided with a flow sensor.

6. The water scrubbing neutralizer for chlorinated polyethylene as claimed in any one of claims 1 to 4, wherein: The kettle body is provided with a pressure difference sensor for detecting the pressure difference between the water washing and neutralizing cavity and the drainage cavity.

Images