Water circulation system applied to chlorinated polyethylene device

Abstract

The utility model discloses a water circulation system of a chlorinated polyethylene device, and belongs to the technical field of fine chemical engineering. The system comprises a hot water pool and a cold water pool, the output end of the cold water pool is respectively connected with a jacket of a chlorination kettle, a jacket of a material waiting kettle, a drying system and a belt filter, the output end of heating steam is connected with the jacket of the chlorination kettle and the drying system, and the jacket of the chlorination kettle and the output end of the drying system are connected with the hot water pool. According to the utility model, the water resource at the jacket outlet of the chlorination reaction kettle is fully utilized.

Description

Technical Field

[0001] This utility model relates to the field of fine chemical technology, and specifically to a water circulation system for a chlorinated polyethylene device. Background Technology

[0002] Chlorinated polyethylene (CPE) is an important downstream product of chlorine. It is an excellent impact modifier for PVC plastics and a synthetic rubber with good overall performance, widely used in cables, wires, hoses, rubber sheets, rubber and plastic products, sealing materials, flame-retardant conveyor belts, waterproof membranes, films, and various profiles. Currently, the widely used CPE production processes include the acid-phase method and the aqueous-phase method. Both methods require steam heating, circulating cold water cooling, circulating hot water cooling, and the replenishment of fresh water. Chlorination reactors use enamel-lined reactors, but the enamel material cannot withstand large temperature differences, otherwise it will crack and be damaged. Therefore, the jacket temperature of the reactor must maintain a certain temperature difference with the reaction temperature. However, the chlorination reaction is a temperature-variable process, requiring different reaction temperatures at each stage. This results in three operating conditions in the chlorination reactor jacket: steam, circulating hot water, and circulating cold water, causing the outlet water temperature of the chlorination reactor jacket to fluctuate continuously. Therefore, how to fully utilize this water to achieve full water resource recovery and reuse in the CPE production process is crucial. Utility Model Content

[0003] The purpose of this invention is to provide a water circulation system for a chlorinated polyethylene (CPE) device, which is used to regulate the water balance of the CPE device, thereby achieving full utilization of water resources.

[0004] The objective of this utility model can be achieved through the following technical solutions:

[0005] A water circulation system for a chlorinated polyethylene plant includes a hot water tank and a cold water tank. The output end of the cold water tank is connected to the jacket of a chlorination reactor, the jacket of a waiting reactor, a drying system, and a belt filter, respectively. The output end of the heating steam is connected to the jacket of the chlorination reactor and the drying system, respectively. The output ends of the jacket of the chlorination reactor and the drying system are connected to the hot water tank.

[0006] In the above system, the top of the hot water tank is connected to the jacket of the chlorination reactor via a hot water circulation pump.

[0007] In the above system, the output end of the drying system and the jacket output end of the waiting vessel are both connected to the cooling tower.

[0008] In the above system, the hot water tank and the cold water tank are connected by an overflow hole.

[0009] In the above system, the bottom of the cooling tower is connected to the cold water pool.

[0010] In the above system, the cold water supply pipe is connected to the cold water tank.

[0011] The beneficial effects of this utility model are:

[0012] I. It has enabled full utilization of the water resources at the outlet of the chlorination reactor jacket;

[0013] Second, the source of circulating hot water was solved by utilizing steam condensate and the outlet water of the chlorination reactor jacket, which is subject to temperature changes.

[0014] Third, by using the method of overflowing the hot water tank into the cold water tank, a portion of the circulating cold water was supplemented, reducing the amount of circulating cold water to be added;

[0015] Fourth, the water storage functions of the hot water tank and cold water tank solve the instability of intermittent water use in the device. Attached Figure Description

[0016] Figure 1 This is a diagram of the water circulation system of a chlorinated polyethylene plant;

[0017] In the diagram, 1. Hot water tank, 2. Cold water tank, 3. Cooling tower, 4. Hot water circulation pump, 5. Cold water circulation pump, 6. Chlorination reactor, 7. Feeding vessel, 8. Drying system, 9. Belt filter, 10. Circulating hot water supply, 11. Circulating hot water return, 12. Circulating cold water supply, 13. Circulating cold water return, 14. Heating steam, 15. Cold water replenishment. Detailed Implementation

[0018] The present invention will be further described below with reference to embodiments, but the scope of protection of the present invention is not limited thereto:

[0019] like Figure 1 A water circulation system for a chlorinated polyethylene plant includes a hot water tank 1 and a cold water tank 2. The output end of the cold water tank 2 is connected to the jacket of the chlorination reactor 6 and the jacket of the waiting reactor 7, respectively.

[0020] The drying system 8 and belt filter 9 are connected. The output end of the heating steam 14 is connected to the jacket of the chlorination reactor 6 and the drying system 8, respectively. The output ends of the jacket of the chlorination reactor 6 and the drying system 8 are connected to the hot water tank 1. The top of the hot water tank 1 is connected to the jacket of the chlorination reactor 6 via a hot water circulation pump 4. The output ends of the drying system 8 and the jacket of the waiting tank 7 are both connected to the cooling tower 3. The hot water tank 1 and the cold water tank 2 are connected through an overflow hole. The bottom of the cooling tower 3 is connected to the cold water tank 2. The cold water makeup pipe 15 is connected to the cold water tank 2.

[0021] The specific process is as follows:

[0022] The circulating cold water in cold water tank 2 is pumped to the process unit via cold water circulation pump 5, and is divided into four pipelines, which are respectively sent to the jacket of chlorination reactor 6, the jacket of waiting reactor 7, the drying system 8, and the belt filter 9. This is used to cool chlorination reactor 6, waiting reactor 7, and drying system 8, and to replenish water for belt filter 9. The circulating cold water return from the jacket of waiting reactor 7 and drying system 8 is merged into one pipeline and sent to cooling tower 3. The cooled circulating cold water from cooling tower 3 flows directly into cold water tank 2. Low-pressure steam provides a heat source for drying system 8 and chlorination reactor 6, and finally forms steam condensate which is sent to hot water tank 1. The circulating hot water in hot water tank 1 is pumped to the jacket of chlorination reactor 6 via hot and cold water circulation pump 4 for cooling chlorination reactor 6. The circulating hot water return 11 from the jacket of chlorination reactor 6 is sent to hot water tank 1. The hot water in hot water tank 1 overflows into cold water tank 2.

Claims

1. A water circulation system for use in a chlorinated polyethylene plant, characterized in that, The system includes a hot water tank (1) and a cold water tank (2). The output end of the cold water tank (2) is connected to the jacket of the chlorination reactor (6), the jacket of the waiting tank (7), the drying system (8), and the belt filter (9), respectively. The output end of the heating steam (14) is connected to the jacket of the chlorination reactor (6) and the drying system (8), respectively. The output end of the jacket of the chlorination reactor (6) and the output end of the drying system (8) are connected to the hot water tank (1).

2. The water circulation system applied to a chlorinated polyethylene plant according to claim 1, characterized in that, The top of the hot water tank (1) is connected to the jacket of the chlorination vessel (6) via a hot water circulation pump (4).

3. The water circulation system applied to a chlorinated polyethylene plant according to claim 1, characterized in that, The output end of the drying system (8) and the jacket output end of the waiting vessel (7) are both connected to the cooling tower (3).

4. The water circulation system applied to a chlorinated polyethylene plant according to claim 1, characterized in that, The hot water pool (1) and the cold water pool (2) are connected by an overflow hole.

5. The water circulation system applied to a chlorinated polyethylene plant according to claim 3, characterized in that, The bottom of the cooling tower (3) is connected to the cold water pool (2).

6. The water circulation system applied to a chlorinated polyethylene plant according to claim 1, characterized in that, The cold water supply pipe (15) is connected to the cold water tank (2).

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