CN215783217U

CN215783217U - PVC polymerization cauldron is scribbled cauldron and is joined in marriage material feeding device

Info

Publication number: CN215783217U
Application number: CN202120775747.XU
Authority: CN
Inventors: 张宏发; 刘金刚; 周亚萍; 张建华; 曹建新
Original assignee: Tianjin Bohua Engineering Co ltd
Current assignee: Tianjin Bohua Engineering Co ltd
Priority date: 2021-04-16
Filing date: 2021-04-16
Publication date: 2022-02-11
Anticipated expiration: 2031-04-16

Abstract

The utility model discloses a PVC polymerization kettle coating agent feeding device which is characterized by comprising a steam pipeline, a kettle coating agent pipeline and a steam ejector, wherein the steam ejector is arranged at the communication position of the steam pipeline and the kettle coating agent pipeline, is communicated with the steam pipeline and the kettle coating agent and is simultaneously communicated with a feeding pipeline of a PVC polymerization kettle. This cauldron agent pan feeding device is scribbled to PVC polymeric kettle can promote to scribble the effective cauldron of going into of cauldron agent, improves and scribbles the cauldron effect, improves polymeric kettle working quality.

Description

PVC polymerization cauldron is scribbled cauldron and is joined in marriage material feeding device

Technical Field

The utility model relates to the field of chemical industry, in particular to a PVC polymerization kettle coating agent feeding device.

Technical Field

The polymerization of PVC (polyvinyl chloride) has a process of coating a kettle coating agent on the inner wall of a polymerization reaction kettle in the production process, and the function of the polymerization is to avoid the kettle sticking phenomenon in the polymerization production.

The existing polymerization reaction kettle has the design scheme that a steam pipe is directly communicated with the lower part of a kettle coating agent pipe, and then the steam pipe is atomized by a spray valve to coat the kettle. The design requirement is that the steam pipe and the kettle coating agent enter the PVC polymerization reaction kettle, and the steam pipe and the kettle coating agent are not mutually reversely connected. The original design scheme is as follows: the pipeline pressure of the kettle coating agent is controlled to be 1.2MPa (gauge pressure) and the steam pipe pressure is controlled to be 0.6-0.8 MPa (gauge pressure), and the pressure in the kettle is lower than the normal pressure, so that the expected design requirement is met. This seems to be feasible theoretically. However, in actual work, the phenomenon that the kettle coating agent cannot effectively enter the kettle is found, so that the kettle coating effect is influenced by the phenomenon of local kettle adhesion, and the temperature of a kettle coating agent pipeline is increased. The main reason is that steam enters a kettle coating agent pipeline, on one hand, the kettle coating agent cannot be completely fed, on the other hand, the atomization effect of the kettle coating agent is poor, and the conditions directly influence the production of a polymerization process.

SUMMERY OF THE UTILITY MODEL

Based on the above problems, the present invention is to modify a polymerization reactor so that a reactor coating agent can be smoothly and efficiently fed into the polymerization reactor. In order to achieve the purpose, the utility model adopts the following technical scheme:

the utility model provides a PVC polymerization cauldron scribbles cauldron agent pan feeding device, the device comprises steam conduit, scribbles cauldron agent pipeline, steam ejector installs in steam conduit and scribbles cauldron agent pipeline intercommunication department, with steam conduit, scribble cauldron agent intercommunication, simultaneously with polymerization cauldron's feed line intercommunication.

The steam ejector comprises a steam cavity communicated with a steam pipeline, a fluid cavity connected with a kettle coating agent pipeline, a steam power nozzle arranged at the terminal of the steam cavity and extending into the fluid cavity, a pressure control inlet part communicated with the outside of the fluid cavity, and a diffusion outlet part tightly sleeved with the pressure control inlet part through a connecting part, wherein the diffusion outlet part is communicated with a feeding pipeline of the polymerization reaction kettle.

Preferably, the diameter of the pressure control inlet part is gradually reduced from the end connected with the fluid chamber, the radius of the pressure expansion outlet part is gradually increased from the socket joint of the pressure control inlet part and the connecting part, and the pressure control inlet part and the pressure expansion outlet part have the same diameter at the connecting part and are hermetically connected through the connecting part.

Preferably, a flow rate valve, a pressure control valve and a one-way control valve are arranged on the steam pipeline.

Preferably, a flow rate valve and a pressure valve are arranged on the coating agent pipeline.

A PVC polymerization reactor comprising: polymerization reaction kettle and the charge-in pipeline who links to each other with polymerization reaction kettle, charge-in pipeline links to each other with the pan feeding device of this application, and charge-in pipeline still connects and leads to the spray valve in the polymerization reaction kettle. The spraying of the inner wall of the polymerization reaction kettle is finished through two spraying valves arranged on the polymerization reaction kettle.

The PVC polymerization kettle coating agent feeding device has the following advantages:

1. prevent steam from entering a pipeline for coating the kettle agent, so that the coating kettle agent effectively enters the PVC polymerization reaction kettle, and the utilization rate is improved. Meanwhile, the temperature of the kettle coating agent pipeline is not increased due to the entering of steam.

2. The premixing of steam and the kettle coating agent is well promoted, the steam carries the kettle coating agent to enter the spray valve, the atomization effect of the kettle coating agent is enhanced, the kettle coating effect is good, and the normal production of the polymerization reaction kettle is facilitated.

Description of the drawings:

in order to make the object, technical scheme and beneficial effect of the utility model more clear, the utility model provides the following drawings for explanation:

FIG. 1 is a schematic structural diagram of a PVC polymerization reactor kettle coating agent feeding device;

FIG. 2 is a schematic diagram of a steam ejector;

FIG. 3 is a schematic view of the overall structure of a polymerization reactor.

Description of the reference numerals

1. A steam line; 2. coating a kettle agent pipeline; 3. a steam ejector; 31. a steam chamber; 32. a steam powered nozzle; 33. a fluid chamber; 34. a pressure control inlet part; 35. a diffusion outlet part; 36. a connecting portion; 40. a polymerization reaction kettle; 41. a feed conduit; 42. and a spray valve.

Detailed Description

The utility model will now be further described by way of the following examples, which are not intended to limit the scope of the utility model in any way. It will be understood by those skilled in the art that equivalent substitutions for the technical features of the present invention, or corresponding modifications, can be made within the scope of the present invention. The components and relative positions set forth in the embodiments do not limit the scope of the present invention unless specifically stated otherwise.

Example 1

The PVC polymerization kettle coating agent feeding device shown in figures 1, 2 and 3 comprises a steam pipeline 1, a kettle coating agent pipeline 2 and a steam ejector 3, wherein the steam ejector is arranged at the communication position of the steam pipeline and the kettle coating agent pipeline, is communicated with the steam pipeline and the kettle coating agent and is simultaneously communicated with a feeding pipeline 41 of a polymerization reaction kettle 40.

The steam ejector 3 comprises a steam cavity 31 communicated with the steam pipeline 1, a fluid cavity 33 connected with the kettle coating agent pipeline 2, a steam power nozzle 32 arranged at the terminal of the steam cavity 31 and extending into the fluid cavity 33, a pressure control inlet part 34 communicated with the outside of the fluid cavity, and a diffusion outlet part 35 tightly sleeved with the pressure control inlet part through a connecting part 36, wherein the diffusion outlet part is communicated with a feeding pipeline of the polymerization reaction kettle. The steam injector is a closed container and is communicated with the steam pipeline and the kettle coating agent pipeline, steam drives kettle coating agent fluid to rapidly enter a feeding pipeline of the polymerization reaction kettle under the strong air pressure of the steam power nozzle by means of the pressure of the steam pipeline, and the kettle coating agent is atomized by a spray valve 42 arranged in the polymerization reaction kettle and then uniformly coated on the inner wall of the polymerization reaction kettle. The left side and the right side of the polymerization reaction kettle are respectively provided with 1 spray valve, the spray valves extend into the polymerization reaction kettle, the positions can be adjusted up and down, and the kettle coating agent on the inner wall of the polymerization reaction kettle is coated.

Preferably, in order to promote the collection and release of the air flow pressure, the outlet pipe cavity of the steam ejector is divided into a pressure control inlet part 34 and a pressure expansion outlet part 35 which are both in a trumpet shape and are hermetically sleeved through a connecting part 36, and the diameters of the pressure control inlet part and the pressure expansion outlet part are the same and the smallest at the connecting part 36.

In order to better control the atomization effect of the steam and the kettle coating agent fluid, preferably, a flow rate valve, a pressure control valve and a one-way control valve are arranged on the steam pipeline 1, and a flow rate valve and a pressure valve are arranged on the kettle coating agent pipeline 2.

The pan feeding device is before improving, and steam conduit and scribble cauldron agent pipeline lug connection back intercommunication pan feeding pipeline pass through the spray valve atomizing and get into polymerization reaction kettle again, and the intention is through setting up the smooth and easy pan feeding of the pressure differential realization of expecting between pipeline and the polymerization reaction kettle of putting into. However, as the steam is often connected in series with the kettle coating agent pipeline, the kettle coating agent cannot be completely fed, the temperature of the kettle coating agent pipeline is increased, damage and energy waste are caused, and finally the kettle coating agent and the steam cannot be well atomized, the atomization effect is poor, and the working effect of the whole equipment is influenced.

After the equipment is reformed, the PVC polymerization kettle coating agent feeding device can promote a steam pipeline to drive a coating agent to effectively enter a kettle through a steam ejector. Meanwhile, the flow is adjusted by adopting a pressure valve, a flow velocity valve and a one-way valve, so that the optimal atomization effect of the coating agent is realized, and the working effect of the PVC polymerization reactor is improved.

Claims

1. The PVC polymerization kettle coating agent feeding device is characterized by comprising a steam pipeline (1), a kettle coating agent pipeline (2) and a steam ejector (3), wherein the steam ejector is arranged at the communication position of the steam pipeline and the kettle coating agent pipeline and is simultaneously communicated with a feeding pipeline (41) of a polymerization reaction kettle (40).

2. The feeding device of the PVC polymerization kettle coating agent of claim 1, wherein the steam injector (3) comprises a steam chamber (31) communicated with a steam pipeline, a fluid chamber (33) connected with the kettle coating agent pipeline (2), a steam power nozzle (32) fixed at the terminal end of the steam chamber and extending into the fluid chamber (33), a pressure control inlet part (34) communicated with the outside of the fluid chamber, and a pressure expansion outlet part (35) tightly sleeved with the pressure control inlet part through a connecting part (36), and the pressure expansion outlet part is communicated with the feeding pipeline of the polymerization kettle.

3. The PVC polymerization reactor kettle coating agent feeding device as recited in claim 2, wherein the pressure control inlet part (34) and the pressure expansion outlet part (35) are both trumpet-shaped and are closely sleeved by a connecting part (36), and the diameters of the pressure control inlet part and the pressure expansion outlet part are the same and the smallest at the connecting part (36).

4. The PVC polymerization kettle coating agent feeding device as recited in any one of claims 1 to 3, wherein the steam pipeline (1) is provided with a flow rate valve, a pressure control valve and a one-way control valve.

5. The PVC polymerization kettle coating agent feeding device as recited in any one of claims 1 to 3, wherein the kettle coating agent pipeline (2) is provided with a flow rate valve and a pressure valve.

6. A PVC polymerization reactor comprising: a polymerization reactor (40) and a feed line (41) connected to the polymerization reactor, characterized in that the feed line (41) is connected to the feed device according to any one of claims 1 to 3, and the feed line (41) is further connected to a shower valve (42) leading into the polymerization reactor.