Flat plate filter washing system for chlorinated polyethylene production

Abstract

The utility model discloses a flat plate filter washing system for chlorinated polyethylene production, which comprises a flat plate filter, a heat exchanger and a temperature controller, the heat exchanger is provided with a heating medium inlet, a heating medium outlet, a washing water inlet and a washing water outlet, the heating medium inlet is connected with a heating medium inlet pipe, a flow regulating valve is mounted on the heating medium inlet pipe, and the temperature controller is connected with the temperature controller. The heating medium outlet is connected with a heating medium return pipe; the washing water inlet is connected with a washing water inlet pipe, the washing water outlet is connected with a washing water outlet pipe, a water outlet of the washing water outlet pipe is located above the flat plate filter, a temperature sensor is installed on the washing water outlet pipe, and the signal output end of the temperature sensor is connected to the temperature controller. And the temperature controller is in control connection with the flow regulating valve. The temperature of washing water can be accurately controlled, the stable washing effect is guaranteed, meanwhile, energy consumption is reduced, and the problem of product caking caused by the fact that the temperature difference between the washing water and materials is too large is solved.

Description

Technical Field

[0001] This utility model belongs to the field of chlorinated polyethylene production technology, specifically relating to a flat plate filter washing system for chlorinated polyethylene production. Background Technology

[0002] There are two methods for producing chlorinated polyethylene in China: one is the aqueous phase method, in which polyethylene is suspended in water and chlorinated; the other is the acid phase method, in which polyethylene is suspended in concentrated hydrochloric acid of about 20% and chlorinated.

[0003] In the acid phase process of chlorinated polyethylene, a flat plate filter is used to remove concentrated hydrochloric acid from the reacted material, followed by washing with a large amount of water to further remove hydrochloric acid from the product. Traditional washing methods typically use tap water at room temperature, but this method suffers from poor washing efficiency, product clumping, and low hydrochloric acid recovery rates.

[0004] To address the aforementioned problems, existing solutions primarily focus on improving washing effectiveness by altering the temperature of the washing water. For example, one method involves heating the washing water to a specific temperature before rinsing the chlorinated polyethylene material. This method can improve washing efficiency, reduce product clumping, and increase hydrochloric acid recovery.

[0005] However, existing solutions still have some problems: First, current washing water heating methods typically consume a large amount of energy, which not only increases production costs but also has a certain impact on the environment. Second, existing washing water heating methods often cannot precisely control the temperature of the washing water, which may lead to unstable washing results and affect product quality. In addition, existing washing water heating methods cannot effectively solve the temperature difference problem between the washing water and the material, which may cause the product to clump, affecting its appearance and performance. Utility Model Content

[0006] The technical problem to be solved by this utility model is to provide a flat plate filter washing system for the production of chlorinated polyethylene that helps to ensure stable washing effect, reduce energy consumption, and avoid product agglomeration caused by temperature difference between washing water and materials.

[0007] To solve the above-mentioned technical problems, the technical solution of this utility model is: a flat plate filter washing system for chlorinated polyethylene production, comprising a flat plate filter, a heat exchanger, and a temperature controller. The heat exchanger is provided with a heat medium inlet, a heat medium outlet, a washing water inlet, and a washing water outlet. The heat medium inlet is connected to a heat medium inlet pipe, and a flow regulating valve is installed on the heat medium inlet pipe. The heat medium outlet is connected to a heat medium return pipe. The washing water inlet is connected to a washing water inlet pipe, and the washing water outlet is connected to a washing water outlet pipe. The outlet of the washing water outlet pipe is located above the flat plate filter. A temperature sensor is installed on the washing water outlet pipe, and the signal output terminal of the temperature sensor is connected to the temperature controller. The temperature controller controls the flow regulating valve.

[0008] As a preferred technical solution, a washing water bypass pipe is connected between the washing water inlet pipe and the washing water outlet pipe, and a bypass inlet control valve is installed on the washing water bypass pipe; a heat exchanger inlet control valve is installed on the washing water inlet pipe. Thus, the flow direction of the washing water can be selected and controlled by opening and closing the bypass inlet control valve and the heat exchanger inlet control valve as needed, thereby achieving free switching between heated washing water and room temperature washing water.

[0009] As a preferred technical solution, the heat exchanger is a plate heat exchanger.

[0010] As a preferred technical solution, the flow regulating valve is an electrically controlled valve.

[0011] As a preferred technical solution, the heat medium return pipe is connected to the heat medium storage tank.

[0012] Compared with the prior art, the present invention has at least the following beneficial effects:

[0013] (1) Energy saving and environmental protection: This utility model replaces the ambient temperature washing water in the plate filter with heated washing water, which is then transported via pipeline to the plate heat exchanger to heat the flowing washing water to a temperature between 35-45℃. This method not only increases the temperature of the washing water and improves the washing effect, but also avoids the large amount of energy consumed by using a large amount of ambient temperature washing water, thus achieving the goal of energy saving. At the same time, the use of heated washing water reduces the amount of washing water used, thereby reducing the amount of wastewater discharged, which also has a positive effect on environmental protection.

[0014] (2) Precise Temperature Control: This invention heats the washing water to between 35-45℃ using hot water supplied through pipelines. A temperature controller and flow regulating valve precisely control the flow rate of the hot water, thereby precisely controlling the washing water temperature. This results in a more stable washing effect and improves product quality. The washing water temperature can be adjusted appropriately according to actual needs to maintain it in the optimal washing state.

[0015] (3) Solving the temperature difference problem: The temperature of the washing water is precisely controlled by adjusting the flow rate of the heat transfer medium, which effectively solves the temperature difference problem between the washing water and the material. Since the temperature of the washing water has been preheated to 35-45℃, it can effectively prevent the chlorinated polyethylene material from clumping due to the large temperature difference between the washing water and the material, thereby ensuring the appearance and performance of the product. Attached Figure Description

[0016] The following figures are intended only to illustrate and explain the present invention and do not limit the scope of the present invention. Wherein:

[0017] Figure 1 This is a structural schematic diagram of an embodiment of the present utility model;

[0018] Figure 2 This is a schematic diagram showing the flow direction of the washing water as it passes through the heat exchanger;

[0019] Figure 3 This is a schematic diagram showing the flow direction of the washing water when it does not pass through the heat exchanger.

[0020] In the diagram: 1-Plate filter; 2-Heat exchanger; 21-Heat medium inlet; 22-Heat medium outlet; 23-Wash water inlet; 24-Wash water outlet; 3-Temperature controller; 4-Heat medium inlet pipe; 5-Flow regulating valve; 6-Heat medium return pipe; 7-Wash water inlet pipe; 8-Wash water outlet pipe; 9-Temperature sensor; 10-Wash water bypass pipe; 11-Bypass inlet control valve; 12-Heat exchanger inlet control valve; 13-Check valve; 14-Water pump; 15-Chlorination reactor. Detailed Implementation

[0021] The present invention will be further described below with reference to the accompanying drawings and embodiments. In the following detailed description, only certain exemplary embodiments of the present invention are described by way of illustration. Undoubtedly, those skilled in the art will recognize that various modifications can be made to the described embodiments without departing from the spirit and scope of the present invention. Therefore, the drawings and description are illustrative in nature and not intended to limit the scope of the claims.

[0022] like Figure 1 As shown, the plate filter washing system for chlorinated polyethylene production includes a plate filter 1, a heat exchanger 2, and a temperature controller 3. In this embodiment, the heat exchanger 2 is a plate heat exchanger, which, through its efficient heat transfer design, enables rapid and effective heat transfer. Of course, other types of heat exchangers can also be used, and all of them should fall within the protection scope of this utility model.

[0023] refer to Figure 1The heat exchanger 2 is equipped with a heat medium inlet 21, a heat medium outlet 22, a washing water inlet 23, and a washing water outlet 24. The heat medium inlet 21 is connected to a heat medium inlet pipe 4, and a flow regulating valve 5 is installed on the heat medium inlet pipe 4. The flow regulating valve 5 is preferably an electric control valve for convenient automatic control and adjustment. The heat medium outlet 22 is connected to a heat medium return pipe 6, which is connected to a heat medium storage tank (not shown in the figure). The heat medium water, after exchanging heat with the washing water through the heat exchanger, is recovered to the heat medium storage tank through the heat medium return pipe 6, thereby achieving the purpose of repeated recycling. The washing water inlet 23 is connected to a washing water inlet pipe 7, which is connected to a water pump 14. The washing water outlet 24 is connected to a washing water outlet pipe 8, and the outlet of the washing water outlet pipe 8 is located above the flat plate filter 1. The material (chlorinated polyethylene slurry containing acid water) that has completed the reaction and cooled to the set temperature in the chlorination reactor 15 is discharged into the flat plate filter 1 for deacidification and washing. A temperature sensor 9 is installed on the washing water outlet pipe 8. The signal output terminal of the temperature sensor 9 is connected to the temperature controller 3, which in turn controls the flow regulating valve 5. In this way, the temperature sensor 9 detects the temperature of the washing water at the outlet, and the flow rate of the heat transfer fluid entering the plate heat exchanger is controlled based on this temperature. This precisely controls the washing water temperature, maintaining it between 35-45℃, resulting in a more stable washing effect and improved product quality. In actual production, the washing water temperature can be adjusted appropriately according to actual needs to maintain it in the optimal washing state.

[0024] See again Figure 1 In this embodiment, a washing water bypass pipe 10 is connected between the washing water inlet pipe 7 and the washing water outlet pipe 8. A bypass inlet control valve 11 is installed on the washing water bypass pipe 10. A heat exchanger inlet control valve 12 and a one-way valve 13 are installed on the washing water inlet pipe 7. Thus, the flow direction of the washing water can be selected and controlled by opening and closing the bypass inlet control valve 11 and the heat exchanger inlet control valve 12 as needed, thereby realizing the free switching between heated washing water and room temperature washing water.

[0025] refer to Figure 2 When the heat exchanger inlet control valve 12 is opened and the bypass inlet control valve 11 is closed, the washing water flows through the heat exchanger 2 and exchanges heat with the heat medium water. By controlling the flow rate of the heat medium water, the washing water is heated to the set temperature and then used to wash the material on the flat plate filter 1. This can effectively solve the temperature difference problem between the washing water and the material, and avoid caking caused by a large temperature difference between the washing water and the material in the cold season.

[0026] refer to Figure 3When the heat exchanger inlet water control valve 12 is closed and the bypass inlet water control valve 11 is opened, the washing water does not flow through the heat exchanger 2, but directly enters through the washing water bypass pipe 10 to wash the material on the flat plate filter 1. In this way, in hot summer or when the ambient temperature is high, the washing water at a higher indoor temperature can be used directly to wash the material on the flat plate filter, making the process switching operation flexible and convenient.

[0027] This washing system has wide applications in chlorinated polyethylene production, washing equipment manufacturing, and environmental engineering, and has broad market demand and good application prospects.

[0028] Firstly, for chlorinated polyethylene manufacturers, using this system can effectively improve the washing effect of the product, reduce product clumping, increase the recovery rate of hydrochloric acid, thereby improving product quality, reducing production costs, and enhancing market competitiveness.

[0029] Secondly, for washing equipment manufacturers, this can provide more innovative points and selling points for their product lines, which will help improve their market image and market share.

[0030] Finally, in the field of environmental engineering, the implementation of this plan can reduce energy consumption, reduce environmental pollution, and help promote the green development of the industry.

[0031] The above description is merely an illustrative embodiment of this utility model and is not intended to limit the scope of this utility model. Any equivalent changes and modifications made by those skilled in the art without departing from the concept and principles of this utility model should fall within the protection scope of this utility model.

Claims

1. A flat plate filter washing system for chlorinated polyethylene production, characterized in that: The device includes a flat plate filter, a heat exchanger, and a temperature controller. The heat exchanger has a heat medium inlet, a heat medium outlet, a washing water inlet, and a washing water outlet. The heat medium inlet is connected to a heat medium inlet pipe, and a flow regulating valve is installed on the heat medium inlet pipe. The heat medium outlet is connected to a heat medium return pipe. The washing water inlet is connected to a washing water inlet pipe, and the washing water outlet is connected to a washing water outlet pipe. The outlet of the washing water outlet pipe is located above the flat plate filter. A temperature sensor is installed on the washing water outlet pipe, and the signal output terminal of the temperature sensor is connected to the temperature controller. The temperature controller controls the flow regulating valve.

2. The flat plate filter washing system for chlorinated polyethylene production as described in claim 1, characterized in that: A washing water bypass pipe is connected between the washing water inlet pipe and the washing water outlet pipe, and a bypass inlet control valve is installed on the washing water bypass pipe; a heat exchanger inlet control valve is installed on the washing water inlet pipe.

3. The flat plate filter washing system for chlorinated polyethylene production as described in claim 1, characterized in that: The heat exchanger is a plate heat exchanger.

4. The flat plate filter washing system for chlorinated polyethylene production as described in claim 1, characterized in that: The flow regulating valve is an electrically controlled valve.

5. The flat plate filter washing system for chlorinated polyethylene production as described in any one of claims 1 to 4, characterized in that: The heat medium return pipe is connected to the heat medium storage tank.

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