Hot water converter of polyvinyl chloride production device
By designing a closed forced circulation hot water converter, the problem of electrochemical corrosion caused by impurity deposition in the converter shell was solved, and the leakage risk and production costs were reduced.
Patent Information
- Application Number
- CN202422652981.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-31
- Publication Date
- 2025-09-23
- Estimated Expiration
- 2034-10-31
AI Technical Summary
Deposits in the converter shell of traditional polyvinyl chloride production equipment can easily lead to electrochemical corrosion, increase the risk of leakage, and increase maintenance and production costs.
A hot water converter for a polyvinyl chloride production plant is designed. A closed forced circulation system is adopted. Hot water enters the cylinder from three different directions through the inlet to avoid impurity deposition. The hot water is circulated through a hot water vapor-liquid separator to effectively remove impurities.
Effectively prevent impurities in hot water from depositing in the converter shell, reduce electrochemical corrosion, lower leakage risks, and reduce maintenance and production costs.
Smart Images
Figure CN223366920U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of vinyl chloride production, in particular to a hot water converter for a polyvinyl chloride production device. Background Art
[0002] In the process of synthesizing polyvinyl chloride by the calcium carbide method, hydrogen chloride and acetylene are converted into vinyl chloride monomer. In this chemical reaction, mercuric chloride is used as a catalyst for the synthesis of vinyl chloride. A large amount of reaction heat is generated in the production process. Hot water in the shell side of the fixed tube plate converter is used to remove the heat from the reaction to ensure that the synthesis temperature of vinyl chloride is controlled at 110℃-180℃. Sediments are easily accumulated on the opposite side of the hot water inlet of the shell side of the traditional converter, resulting in local high temperature in the converter tube side, causing mercuric chloride to sublime, affecting the service life of the catalyst, and the converter leaks seriously. The sediments in the shell side of the converter contain impurities such as rust, scale, and sludge, which are prone to electrochemical corrosion, resulting in serious leakage of the converter, increasing the cost of manual inspection and maintenance, and thus increasing production costs. Utility Model Content
[0003] In response to the above problems, the utility model provides a hot water converter for a polyvinyl chloride production device, which has the characteristics of simple structure and closed forced circulation. It is used to solve the problem that impurities such as rust, scale, sludge, etc. are contained in the sediments in the shell of the converter, which are prone to electrochemical corrosion, resulting in serious leakage of the converter, increased manual inspection and maintenance costs, and thus increased production costs.
[0004] In order to achieve the above-mentioned purpose, the technical solution of the present utility model is as follows:
[0005] A hot water converter for a polyvinyl chloride production device is characterized by comprising a converter cylinder, a first converter hot water inlet, a second converter hot water inlet, and a third converter hot water inlet; the converter cylinder is provided with openings uniformly distributed along the bottom of the converter shell side cylinder, with the first converter hot water inlet, the second converter hot water inlet, and the third converter hot water inlet.
[0006] It also includes a converter material inlet, a converter material outlet, a converter hot water outlet, a converter condensed water inlet, and a hot water vapor-liquid separator. The converter material inlet is provided at the top of the converter cylinder tube side, the converter material outlet is provided at the bottom of the converter cylinder tube side, the converter hot water outlet is provided at the top of the converter cylinder shell side, the converter hot water outlet is connected to the hot water vapor-liquid separator, and the hot water vapor-liquid separator is connected to the converter condensed water inlet.
[0007] The beneficial effects of the utility model are:
[0008] (1) When the utility model is used, the hot water inlet of the converter enters from three directions of the cylinder, and the water flow impact can prevent impurities such as rust, scale, and sludge in the hot water from being deposited at the bottom of the converter shell.
[0009] (2) The reaction materials of the converter can enter from the top of the converter, and after the reaction is completed, they flow out from the bottom of the converter and enter the downstream process, so that the materials and catalysts can be separated and used. The hot water forms a closed forced circulation through the hot water delivery pump, the hot water circulation tank, and the converter. BRIEF DESCRIPTION OF THE DRAWINGS
[0010] Figure 1 It is a structural diagram of the present utility model.
[0011] Figure numerals: converter cylinder 1, first converter hot water inlet 2, second converter hot water inlet 3, third converter hot water inlet 4, converter hot water outlet 5, converter condensate inlet 6, converter material inlet 7, converter material outlet 8, hot water vapor-liquid separator 9. DETAILED DESCRIPTION
[0012] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.
[0013] like Figure 1 As shown, it includes a converter cylinder 1, a first converter hot water inlet 2, a second converter hot water inlet 3, and a third converter hot water inlet 4. The converter cylinder 1 is evenly distributed with openings along the bottom of the converter shell cylinder, and the first converter hot water inlet 2, the second converter hot water inlet 3, and the third converter hot water inlet 4 are provided.
[0014] like Figure 1 As shown, it also includes a converter material inlet 7, a converter material outlet 8, a converter hot water outlet 5, a converter condensed water inlet 6, and a hot water vapor-liquid separator 9. The converter cylinder 1 is provided with a converter material inlet 7 at the top of the tube side, and a converter material outlet 8 is provided at the bottom of the tube side. The converter cylinder 1 is provided with a converter hot water outlet 5 at the top of the shell side. The converter hot water outlet 5 is connected to the hot water vapor-liquid separator 9, and the hot water vapor-liquid separator 9 is connected to the converter condensed water inlet 6.
[0015] When the utility model is used, all pipes and fittings in the device are pressure-tested to 0.1 MPa, and metal spiral wound gaskets are used at the pipe flange connections. The valves of the first converter hot water inlet 2, the second converter hot water inlet 3, the third converter hot water inlet 4, the converter hot water outlet 5, and the converter condensate inlet 6 are opened, and the hot water circulation pump is turned on to establish a converter shell-side hot water system circulation. The first converter hot water inlet 2, the second converter hot water inlet 3, and the third converter hot water inlet 4 are assembled in the center of the bottom of the converter cylinder 1 to form convection, preventing impurities such as rust, scale, and sludge carried in the hot water system from being deposited at the bottom of the converter shell. These impurities can flow out of the converter with the water flow. The converter reaction materials can enter from the top of the converter, flow out from the bottom of the converter after the reaction is completed, and enter the downstream process. The condensate of the hot water vapor-liquid separator 9 flows into the converter through the overflow port at the top of the converter shell. The excess hot water returns to the hot water circulation tank. The hot water forms a closed forced circulation through the hot water delivery pump, the hot water circulation tank, and the converter.
[0016] Finally, it should be noted that the above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art will be able to modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein with equivalents. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.
Claims
1. A hot water converter for a polyvinyl chloride production device, characterized in that: The converter comprises a converter cylinder (1), a first converter hot water inlet (2), a second converter hot water inlet (3), and a third converter hot water inlet (4); the converter cylinder (1) is provided with openings uniformly distributed along the bottom of the converter shell-side cylinder, the first converter hot water inlet (2), the second converter hot water inlet (3), and the third converter hot water inlet (4).
2. The hot water converter of a polyvinyl chloride production device according to claim 1, characterized in that: The converter further comprises a converter material inlet (7), a converter material outlet (8), a converter hot water outlet (5), a converter condensed water inlet (6), and a hot water vapor-liquid separator (9). The converter barrel (1) is provided with a converter material inlet (7) at the top of the tube side, a converter material outlet (8) at the bottom of the tube side, a converter hot water outlet (5) at the top of the shell side, the converter hot water outlet (5) is connected to the hot water vapor-liquid separator (9), and the hot water vapor-liquid separator (9) is connected to the converter condensed water inlet (6).