CN213895431U

CN213895431U - Centrifugation mother liquor retrieval and utilization device in chlorinated polyvinyl chloride production

Info

Publication number: CN213895431U
Application number: CN202022480633.0U
Authority: CN
Inventors: 侯顺祥; 王振辉; 侯林; 孙志强
Original assignee: Shandong Xiangsheng New Material Technology Co ltd
Current assignee: Shandong Xiangsheng New Material Technology Co ltd
Priority date: 2020-10-30
Filing date: 2020-10-30
Publication date: 2021-08-06
Anticipated expiration: 2030-10-30

Abstract

The utility model discloses a centrifugation mother liquor retrieval and utilization device in chlorinated polyvinyl chloride production, include the washing jar, neutralization tank, centrifuge and the return water jar that communicate in proper order through pipeline and valve, the discharge gate of washing jar communicates the feed inlet of neutralization tank, and the discharge gate of neutralization tank communicates centrifuge's feed inlet, and centrifuge's mother liquor export communicates the feed inlet of return water jar through the heat preservation pipeline, and the return water jar is equipped with agitating unit, and the discharge gate of return water jar communicates the feed inlet of washing jar through the heat preservation pipeline. The utility model discloses can furthest reduce the energy consumption, furthest retrieves the waste heat complementary energy, the using water wisely can improve the yield of end product.

Description

Centrifugation mother liquor retrieval and utilization device in chlorinated polyvinyl chloride production

Technical Field

The utility model belongs to the technical field of chemical production equipment, concretely relates to centrifugation mother liquor retrieval and utilization device in chlorinated polyvinyl chloride production.

Background

Chlorinated polyvinyl chloride (CPVC) resin is a chlorinated product of polyvinyl chloride (PVC) resin, has the chlorine content of generally 61-68 percent, is novel engineering plastic, is widely applied to chemical industry, electrical appliances, pipes, building and shipbuilding fields and other fields, and has very wide application prospect. The existing chlorinated polyvinyl chloride production process adopts an aqueous phase suspension method, and the aqueous phase suspension method has high requirements on the selection of raw material polyvinyl chloride (PVC), requires the raw material polyvinyl chloride (PVC) to be in a loose structure, and has a thin and loose resin skin layer, so that the gap between molecules of chlorinated polyvinyl chloride (CPVC) generated after reaction is large, and more hydrochloric acid is always present in the gap between the surface of the molecule and the inside of the molecule, thereby increasing the difficulty of washing. The hydrochloric acid in the material can not be removed by using the water with the lower temperature, the water conveyed to the washing kettle needs to be heated before water extraction, the molecular movement speed of the material in the water with the higher temperature is higher, the washing effect is better, after the water washing is finished, the material enters a neutralization tank, alkali is added for neutralization, and the material enters a centrifuge for centrifugation after the neutralization reaction. A large amount of centrifugal mother liquor can be generated when a device for producing chlorinated polyvinyl chloride (CPVC) by using a water phase suspension method is used for centrifuging, and most enterprises directly discharge the chlorinated polyvinyl chloride (CPVC) after simple treatment according to the traditional method. The temperature of the centrifugal mother liquor is about 80 ℃, and the centrifugal mother liquor is often discharged from a water discharge port with a certain amount of materials due to the large gaps and small particle diameters of the screen of the centrifugal machine. The waste heat and the complementary energy of the centrifugal mother liquor can not be timely and sufficiently recovered, the water resource can not be fully utilized, and the redundant materials in the centrifugal mother liquor can not be timely recovered, so that the resource utilization rate is reduced, and the production cost is increased. The problems of low material recycling rate, water resource waste, energy sources incapable of being recycled in time and the like exist.

Disclosure of Invention

The utility model discloses the technical problem that will solve is: aiming at the defects existing in the prior art, the centrifugal mother liquor recycling device in the chlorinated polyvinyl chloride production can solve the problems of low material recycling rate, water resource waste, energy sources incapable of being recycled in time and the like.

In order to solve the technical problem, the technical scheme of the utility model is that:

the utility model provides a centrifugation mother liquor retrieval and utilization device in chlorinated polyvinyl chloride production, includes water washing jar, neutralization jar, centrifuge and the return water jar that communicates in proper order through pipeline and valve, and the discharge gate of water washing jar communicates the feed inlet of neutralization jar, and the discharge gate of neutralization jar communicates the feed inlet of centrifuge, and centrifuge's mother liquor export communicates the feed inlet of return water jar through heat preservation pipeline, and the return water jar is equipped with agitating unit, and the discharge gate of return water jar communicates the feed inlet of water washing jar through heat preservation pipeline.

Preferably, the water washing tank is a rubber lining water washing tank. Since the system generates an acidic medium such as hydrogen chloride, all the rubber lined tanks are preferred.

Preferably, the neutralization tank is an enamel reaction tank. The acid-base solution is preferably an enamel reaction tank because it is corrosive and the acid-base reaction generates heat.

Preferably, the centrifuge is a LLW450 horizontal spiral discharge filter centrifuge. The manufacturer is Jiangsu Hua big centrifuge manufacturing limited company. Suspension liquid in the centrifuge enters the spiral inner cavity from the feeding hole, liquid phase in slurry is separated out through a screen arranged on the rotating wall under the action of a centrifugal force field, and solid phase particles are intercepted in the rotating drum, so that automatic and continuous separation of solid phase and liquid phase is realized.

Preferably, the water return tank is a rubber-lined water return tank, the water return tank is provided with a stirring device, the stirring device comprises a stirring motor, a speed reducer and a stirring shaft entering the tank body, the stirring motor and the speed reducer are arranged from top to bottom, the stirring shaft is symmetrically provided with a plurality of pairs of stirring paddles, and the stirring paddles are four-oblique-blade stirring paddles; the materials are uniformly distributed in water under the action of the stirring device to form turbid liquid with uniformly dispersed particles, and the turbid liquid is conveyed to the washing kettle through a heat insulation pipeline. So as to achieve the purposes of recycling partial materials and fully utilizing water resources.

The principle of the utility model is as follows:

this device design is for earlier carrying out preliminary washing with the centrifugal mother liquor about 80 ℃, remaining material recycle in with centrifugal mother liquor to the material that utilizes the mother liquor after alkali lye neutralization to washing the cauldron carries out preliminary washing material, then the reuse heats the deionized water about 85 ℃ and carries out further washing material, washes the material through this twice, has reached the effect of fully washing the material, has practiced thrift the washing material water, has still retrieved partial material.

Since the technical scheme is used, the beneficial effects of the utility model are that:

the utility model discloses to the recovery of the higher centrifugation mother liquor of temperature and recycle, its one of which is through the recovery with the higher centrifugation mother liquor of temperature, as washing water reuse, can furthest make full use of water resource, can reduce wastewater discharge, alleviateed sewage station treatment pressure simultaneously, the using water cost is practiced thrift. And secondly, materials can be effectively recovered, the centrifugal mother liquor with the materials is used as washing water to enter a washing tank for washing, and the waste of the materials is reduced. Thirdly, the centrifugal mother liquor can be effectively recycled, heat energy can be recovered, and pollution is eliminated. Not only saves the operating cost, but also reduces the fuel consumption and the gas emission generated by fuel combustion. The waste heat and the complementary energy of the centrifugal mother liquor can be recovered to the maximum extent, the waste of resources is reduced, and the influence degree on the environment is reduced, so that the construction of a resource-saving and environment-friendly society is promoted. Can reduce energy consumption to the utmost extent, and strives to obtain great economic benefit and social benefit on the link of saving energy.

In a word, the utility model discloses the utilization of resources is effectual, can furthest reduce the energy consumption, furthest retrieves the waste heat complementary energy, and the yield of final product can be improved to the using water wisely.

Drawings

Fig. 1 is a schematic flow chart of an apparatus according to an embodiment of the present invention;

in the figure, 1, a water washing tank; 2. a neutralization tank; 3. a centrifuge; 4. a water return tank; 5. and (4) a stirring device.

Detailed Description

The invention is further explained below with reference to the drawings and examples.

Example one

As shown in fig. 1, the utility model relates to a centrifugation mother liquor retrieval and utilization device in chlorinated polyvinyl chloride production, include washing jar 1, neutralization jar 2, centrifuge 3 and return water jar 4 that communicate in proper order through pipeline and valve, the discharge gate of washing jar 1 communicates the feed inlet of neutralization jar 2, and the discharge gate of neutralization jar 2 communicates centrifuge 3's feed inlet, and centrifuge 3's mother liquor export communicates the feed inlet of return water jar 4 through heat preservation pipeline, is equipped with agitating unit 5 in the return water jar 4, and the discharge gate of return water jar 4 communicates the feed inlet of washing jar 1 through heat preservation pipeline.

The backwater tank 4 is a rubber-lined backwater tank, the stirring device 5 of the backwater tank comprises a stirring motor (not marked), a speed reducer (not marked) and a stirring shaft (not marked) which are arranged from top to bottom, and a plurality of pairs of stirring paddles (not marked) are symmetrically arranged on the stirring shaft; the stirring paddles are four-oblique-blade stirring paddles and have the characteristics of light weight and excellent performance, and multiple groups of stirring paddles can be arranged.

It should be understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Furthermore, it should be understood that various changes and modifications of the present invention may be made by those skilled in the art after reading the teachings of the present invention, and these equivalents also fall within the scope of the appended claims.

Claims

1. The utility model provides a centrifugation mother liquor retrieval and utilization device in chlorinated polyvinyl chloride production which characterized in that: include washing jar, neutralization tank, centrifuge and the return water jar that communicates in proper order through pipeline and valve, the discharge gate of washing jar communicates the feed inlet of neutralization tank, the discharge gate of neutralization tank communicates the feed inlet of centrifuge, centrifuge's mother liquor export communicates the feed inlet of return water jar through the heat preservation pipeline, the return water jar is equipped with agitating unit, the discharge gate of return water jar communicates the feed inlet of washing jar through the heat preservation pipeline.

2. The recycling device of centrifugal mother liquor in chlorinated polyvinyl chloride production according to claim 1, characterized in that: the water washing tank is a rubber lining water washing tank.

3. The recycling device of centrifugal mother liquor in chlorinated polyvinyl chloride production according to claim 1, characterized in that: the neutralization tank is an enamel reaction tank.

4. The recycling device of centrifugal mother liquor in chlorinated polyvinyl chloride production according to claim 1, characterized in that: the centrifuge is a LLW450 horizontal spiral discharge filtering centrifuge.

5. The recycling device of centrifugal mother liquor in chlorinated polyvinyl chloride production according to claim 1, characterized in that: the water return tank is a rubber-lined water return tank.

6. The recycling device of centrifugal mother liquor in chlorinated polyvinyl chloride production according to claim 1, characterized in that: the stirring device comprises a stirring motor, a speed reducer and a stirring shaft which are arranged from top to bottom, wherein a plurality of pairs of stirring paddles are symmetrically arranged on the stirring shaft, and the stirring paddles are four-oblique-blade stirring paddles.