Cleaning device for chlorinated paraffin heat exchanger

Abstract

The utility model discloses a chlorinated paraffin heat exchanger cleaning device which comprises a liquid preparation circulating tank, a small circulating loop and a large circulating loop, one end of the small circulating loop is connected to the liquid preparation circulating tank, and the other end of the small circulating loop is connected to one end of the large circulating loop. The other end of the large circulation loop is connected to the liquid preparation circulation tank, and the small circulation loop is also connected with a waste liquid discharge pipeline; wherein the liquid preparation circulating tank is connected with a temperature detection unit, the liquid preparation circulating tank is used for storing and loading a cleaning agent, and the small circulating loop is used for uniformly mixing the cleaning agent in the liquid preparation circulating tank. And the large circulation loop is used for introducing the cleaning agent into the heat exchanger and enabling the cleaning agent in the heat exchanger to flow back into the liquid preparation circulation tank so as to complete cleaning of the heat exchanger, and the problem of how to clean the heat exchanger in the chlorinated paraffin production process in the prior art can be solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of chlorinated paraffin production, and particularly relates to a chlorinated paraffin heat exchanger cleaning device. Background Art

[0002] Chlorinated paraffin, also known as chlorinated alkanes, is obtained by reacting liquid paraffin and chlorine. In the process of producing chlorinated paraffin using liquid paraffin and chlorine, the chlorination reaction will release a large amount of heat, so an external circulation heat exchanger is used to cool the reaction materials. As a key device for achieving heat transfer, the heat exchanger is often used in the production of chlorinated paraffin to control the reaction temperature. It is a key device to ensure product quality and effectively utilize heat. Its performance directly affects production efficiency and energy consumption. In the production of chlorinated paraffin, the traditional heat exchanger system often has a decrease in heat transfer efficiency due to the deposition of dirt on the heat exchange surface during use, and needs to be regularly dismantled, cleaned and maintained, which increases operating costs and manpower investment. Therefore, there is an urgent need for a cleaning device that can clean the heat exchanger to improve production efficiency. Utility Model Content

[0003] In view of the deficiencies of the prior art, the purpose of the utility model is to provide a chlorinated paraffin heat exchanger cleaning device to solve the problem of how to clean the heat exchanger in the chlorinated paraffin production process in the prior art.

[0004] A chlorinated paraffin heat exchanger cleaning device comprises a liquid distribution circulation tank, a small circulation loop and a large circulation loop, wherein one end of the small circulation loop is connected to the liquid distribution circulation tank, the other end of the small circulation loop is connected to one end of the large circulation loop, the other end of the large circulation loop is connected to the liquid distribution circulation tank, and the small circulation loop is also connected to a waste liquid discharge pipeline.

[0005] Among them, a temperature detection unit is connected to the liquid distribution circulation tank, the liquid distribution circulation tank is used to store and load the cleaning agent, the temperature detection unit is used to detect the temperature of the cleaning agent, the small circulation loop is used to evenly mix the cleaning agent in the liquid distribution circulation tank, and the large circulation loop is used to pass the cleaning agent into the heat exchanger and return the cleaning agent in the heat exchanger to the liquid distribution circulation tank to complete the cleaning of the heat exchanger.

[0006] Preferably, the small circulation loop includes a first pipeline, a circulation pump, a second pipeline and a third pipeline, one end of the first pipeline is connected to the liquid distribution circulation tank, the other end of the first pipeline is connected to the circulation pump, the circulation pump is connected to the second pipeline, the second pipeline is connected to the third pipeline, the third pipeline is connected to the large circulation loop, and the waste liquid discharge pipeline is connected to the second pipeline.

[0007] Preferably, a first valve is connected to the first pipeline between the circulation pump and the liquid distribution circulation tank.

[0008] Preferably, a second valve is connected to the second pipeline between the circulation pump and the third pipeline.

[0009] Preferably, a third valve is connected to the third pipeline between the second pipeline and the large circulation loop.

[0010] Preferably, the large circulation loop includes a fourth pipeline, multiple first branches, multiple second branches, and a fifth pipeline, the fourth pipeline is connected to the small circulation loop, multiple first branches are connected to the fourth pipeline, the first branch is connected to the heat exchanger, the fifth pipeline is connected to the liquid distribution circulation tank, and multiple second branches are connected to the heat exchanger.

[0011] Preferably, a fourth valve is connected to the first branch pipe.

[0012] Preferably, a fifth valve is connected to the second branch pipe.

[0013] Preferably, the waste liquid discharge pipeline includes a waste liquid discharge pipe and a sixth valve connected to the waste liquid discharge pipe, and the waste liquid discharge pipe is connected to the small circulation loop.

[0014] The cleaning device provided by the utility model first adds various solutions constituting cleaning agents into a liquid distribution circulation tank and then circulates the various solutions through a small circulation loop to achieve the purpose of evenly mixing the various solutions. After the cleaning agents are evenly mixed, the cleaning agents are introduced into a heat exchanger in a chlorinated paraffin production process through a large circulation loop. The cleaning agents flow back into the liquid distribution circulation tank through the large circulation loop and then flow into the heat exchanger. In this way, the purpose of fully cleaning the heat exchanger is achieved, and the problem of how to clean the heat exchanger in a chlorinated paraffin production process in the prior art can be solved. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. In all drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn according to the actual scale.

[0016] Figure 1 It is a structural schematic diagram of the cleaning device provided by the utility model;

[0017] Figure 2 It is a structural schematic diagram of the heat exchanger provided by the utility model. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0019] In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "top", "bottom", "top surface", "bottom surface", "inside", "outside", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0020] In the description of the present utility model, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed" etc. are understood to exclude the number itself, and "above", "below", "within" etc. are understood to include the number itself. If the terms "first", "second", "third" are described, they are only used for the purpose of description and distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0021] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "set" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. The following is a description of the embodiments of the present invention based on its overall structure.

[0022] See also Figure 1 and Figure 2 A chlorinated paraffin heat exchanger cleaning device comprises a liquid distribution circulation tank 1, a small circulation loop 2 and a large circulation loop 3, one end of the small circulation loop 2 is connected to the liquid distribution circulation tank 1, the other end of the small circulation loop 2 is connected to one end of the large circulation loop 3, the other end of the large circulation loop 3 is connected to the liquid distribution circulation tank 1, and the small circulation loop 2 is also connected to a waste liquid discharge pipeline 4.

[0023] Among them, the liquid preparation circulation tank 1 is connected to a temperature detection unit 5, the liquid preparation circulation tank 1 is used to store and load the cleaning agent, the small circulation loop 2 is used to evenly mix the cleaning agent in the liquid preparation circulation tank 1, and the large circulation loop 3 is used to pass the cleaning agent into the heat exchanger and return the cleaning agent in the heat exchanger to the liquid preparation circulation tank 1 to complete the cleaning of the heat exchanger.

[0024] The cleaning device provided above first adds various solutions constituting the cleaning agent into the liquid preparation circulation tank 1 and then circulates the various solutions through the small circulation loop 2 to achieve the purpose of evenly mixing the various solutions. When the cleaning agent is evenly mixed, the cleaning agent is introduced into the heat exchanger in the chlorinated paraffin production process through the large circulation loop 3. The cleaning agent flows back to the liquid preparation circulation tank 1 through the large circulation loop 3, and then flows into the heat exchanger. In this way, the purpose of fully cleaning the heat exchanger is achieved, which can solve the problem of how to clean the heat exchanger in the chlorinated paraffin production process in the prior art.

[0025] Specifically, the cleaning device can be connected in parallel with multiple heat exchangers to achieve the purpose of cleaning multiple heat exchangers at the same time, or a heat exchanger can be cleaned separately. Therefore, the cleaning device can be flexibly used in the production process of chlorinated paraffin to clean a certain, part or all of the heat exchangers.

[0026] Specifically, the cleaning agent is prepared by mixing citric acid and hydrochloric acid corrosion inhibitor. The cleaning agent can be prepared by adding 10% citric acid and 0.5% hydrochloric acid corrosion inhibitor. The cleaning agent is prepared for the specific dirt on the heat exchanger in the production process of chlorinated paraffin. In order to ensure the cleaning effect, the temperature of the cleaning agent is controlled at 60°C to 80°C during the cleaning process, and the large circulation loop circulates for 2 to 3 hours. Through the above cleaning device and the above cleaning process, the output of chlorinated paraffin is increased by 20%-30% compared with before cleaning.

[0027] The heat exchanger used in the production process of chlorinated paraffin is a graphite heat exchanger. The traditional graphite heat exchanger only has upper and lower head material inlet and outlet, external circulation cooling water inlet and outlet and a small sewage outlet. To clean the heat exchanger, the external circulation pipeline needs to be removed and the external circulation inlet and outlet need to be used for cleaning, which is complicated. Therefore, the graphite heat exchanger is improved in the utility model, and a cleaning flange is reserved on the graphite heat exchanger, so that it can be cleaned under normal production conditions.

[0028] See also Figure 2 The heat exchanger provided by the utility model is as follows Figure 2As shown, the heat exchanger 7 is provided with a chlorinated paraffin inlet 71, a chlorinated paraffin outlet 72, a cooling water inlet 76, a cooling water outlet 73, a cleaning inlet 75, a cleaning outlet 74, a sewage outlet 77, and an exhaust outlet 78. Compared with the existing heat exchanger, the reserved cleaning flange can form the cleaning inlet 75 and the cleaning outlet 74, and the cooling water inlet 76 and the cooling water outlet 73 are no longer used for cleaning, and there is no need to remove the external circulation pipeline. The external circulation inlet and outlet are used for cleaning, which makes the cleaning operation simple.

[0029] Specifically, the temperature detection unit 5 is a temperature sensor, which displays the temperature of the cleaning agent so as to control the cleaning agent at an optimal cleaning temperature through the external circulation amount of chlorinated paraffin.

[0030] See also Figure 1 In a preferred embodiment, the small circulation loop 2 includes a first pipeline 21, a circulation pump 22, a second pipeline 23 and a third pipeline 24, one end of the first pipeline 21 is connected to the liquid distribution circulation tank 1, the other end of the first pipeline 21 is connected to the circulation pump 22, the circulation pump 22 is connected to the second pipeline 23, the second pipeline 23 is connected to the third pipeline 24, the third pipeline 24 is connected to the large circulation loop 3, and the waste liquid discharge pipeline 4 is connected to the second pipeline 23.

[0031] Specifically, as a preferred implementation scheme, the first pipeline 21, the second pipeline 23, and the third pipeline 24 are made of corrosion-resistant materials, such as corrosion-resistant fiberglass materials, which can prevent the cleaning agent from corroding the pipeline and increase the service life and service life of the pipeline.

[0032] Specifically, as a preferred embodiment, the cleaning agent in the liquid preparation circulation tank 1 can be sequentially introduced into the first pipe 21, the second pipe 23 and the third pipe 24 through the circulation pump 22, and then refluxed into the liquid preparation circulation tank 1, so as to achieve the purpose of preparing the cleaning agent, and there is no need to prepare the cleaning agent externally. This method of not needing to prepare the cleaning agent externally and then loading the prepared cleaning agent into the liquid preparation circulation tank 1 improves the preparation efficiency of the cleaning agent. Figure 1 In a preferred embodiment, a first valve 61 is connected to the first pipe 21 between the circulation pump 22 and the liquid circulation tank 1. Specifically, the first valve 61 can control the preparation rate of the cleaning agent during the preparation process to improve the uniform mixing effect of the cleaning agent.

[0033] See also Figure 1In a preferred embodiment, a second valve 62 is connected to the second pipe 23 between the circulation pump 22 and the third pipe 24. Specifically, the second valve 62 can control the amount of cleaning agent from the second pipe 23 to the third pipe 24.

[0034] See also Figure 1 In a preferred embodiment, a third valve 63 is connected to the third pipeline 24 between the second pipeline 23 and the large circulation loop 3. The third valve 63 can control the amount of cleaning agent that flows back from the third pipeline 24 to the liquid distribution circulation tank 1.

[0035] See also Figure 1 In a preferred embodiment, the large circulation loop 3 includes a fourth pipeline 31, multiple first branch pipes 32, multiple second branch pipes 33, and a fifth pipeline 34. The fourth pipeline 31 is connected to the small circulation loop 2, multiple first branch pipes 32 are connected to the fourth pipeline 31, the first branch pipe 32 is connected to the heat exchanger, the fifth pipeline 34 is connected to the liquid distribution circulation tank 1, and multiple second branch pipes 33 are connected to the heat exchanger.

[0036] Specifically, as a preferred embodiment, the fourth pipe 31 is connected to the small circulation loop 2, and the cleaning agent in the liquid distribution circulation tank 1 is passed into the second branch pipe 33 through the circulation pump 22 in the small circulation loop 2, and the second branch pipe 33 then passes the cleaning agent into the heat exchanger, and the cleaning agent in the heat exchanger flows out through the second branch pipe 33, and then flows into the fifth pipe 34, and flows back to the liquid distribution circulation tank 1 through the fifth pipe 34. The circulation pump 22 can realize the circulation of the cleaning agent between the liquid distribution circulation tank 1 and the heat exchanger, thereby enhancing the cleaning efficiency and cleaning effect. And multiple first branches 32 and multiple second branches 33 can realize the parallel connection of the cleaning device with multiple heat exchangers, so as to achieve the purpose of cleaning multiple heat exchangers at the same time.

[0037] See also Figure 1 In a preferred embodiment, a fourth valve 64 is connected to the first branch pipe 32. Specifically, the fourth valve 64 can control the amount of the cleaning agent entering the heat exchanger.

[0038] See also Figure 1 In a preferred embodiment, a fifth valve 65 is connected to the second branch pipe 33. Specifically, the fifth valve 65 can control the amount of the cleaning agent that flows back to the liquid circulation tank 1 in the heat exchanger.

[0039] See also Figure 1In a preferred embodiment, the waste liquid discharge pipeline 4 includes a waste liquid discharge pipe 41 and a sixth valve 66 connected to the waste liquid discharge pipe 41. Specifically, the waste liquid discharge pipe 41 is connected to the small circulation loop 2, and the cleaning agent after recycling in the liquid distribution circulation tank 1 can be discharged through the waste liquid discharge pipe 41. The recycled cleaning agent contains dirt on the heat exchanger, so it needs to be discharged to the sewage pool through the waste liquid discharge pipe 41 for subsequent treatment. The sixth valve 66 can control the discharge volume.

[0040] The cleaning device provided in the above embodiment, when cleaning the graphite heat exchanger during the production process of chlorinated paraffin, uses a circulating pump to mix the solution of the cleaning agent evenly through a small circulation loop. Then stop the chlorinated paraffin external circulation pump, close the cooling water inlet and outlet valves, open the sewage outlet and the exhaust port to drain the water in the graphite heat exchanger, and close the sewage outlet and the exhaust port. Open the cleaning inlet and outlet valves, start the circulation pump and use the large circulation loop to clean the graphite heat exchanger. At the same time, the cleaning temperature can be observed. The temperature of the cleaning agent can be controlled at 60°C to 80°C by the circulation amount of the chlorinated paraffin external circulation, and the cleaning is completed in about 2 hours. Stop the cleaning circulation pump, let the cleaning agent flow back to the liquid distribution circulation tank, open the cooling water inlet and outlet valves to resume normal production, and the output of chlorinated paraffin after cleaning is increased by 20%-30% compared with before cleaning.

[0041] In summary, the cleaning device provided by the utility model can realize the cleaning of the heat exchanger with chlorinated paraffin under normal production conditions, and has the advantages of simple operation, high cleaning efficiency and good cleaning effect.

[0042] The foregoing descriptions of specific exemplary embodiments of the present invention are for the purpose of explanation and illustration. These descriptions are not intended to limit the present invention to the precise form disclosed, and it is obvious that many changes and variations can be made based on the above teachings. Although an embodiment of the present invention has been shown and described, this specific embodiment is merely an explanation of the present invention and is not a limitation of the present invention. The specific features, structures, materials or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. The purpose of selecting and describing the exemplary embodiments is to explain the specific principles of the present invention and its practical application, so that those skilled in the art can make modifications, substitutions, variations and various selections and changes to the embodiments without creative contribution as needed after reading this specification without departing from the principles and purpose of the present invention, but they are protected by patent law as long as they are within the scope of the claims of the present invention.

Claims

1. A chlorinated paraffin heat exchanger cleaning device, characterized in that: It comprises a liquid preparation circulation tank (1), a small circulation loop (2) and a large circulation loop (3), wherein one end of the small circulation loop (2) is connected to the liquid preparation circulation tank (1), the other end of the small circulation loop (2) is connected to one end of the large circulation loop (3), the other end of the large circulation loop (3) is connected to the liquid preparation circulation tank (1), and the small circulation loop (2) is also connected to a waste liquid discharge pipeline (4); The liquid distribution circulation tank (1) is connected to a temperature detection unit (5), the liquid distribution circulation tank (1) is used to store and load the cleaning agent, the temperature detection unit (5) is used to detect the temperature of the cleaning agent, the small circulation loop (2) is used to evenly mix the cleaning agent in the liquid distribution circulation tank (1), and the large circulation loop (3) is used to pass the cleaning agent into the heat exchanger and return the cleaning agent in the heat exchanger to the liquid distribution circulation tank (1), so as to complete the cleaning of the heat exchanger.

2. The chlorinated paraffin heat exchanger cleaning device according to claim 1, characterized in that: The small circulation loop (2) comprises a first pipeline (21), a circulation pump (22), a second pipeline (23) and a third pipeline (24); one end of the first pipeline (21) is connected to the liquid distribution circulation tank (1); the other end of the first pipeline (21) is connected to the circulation pump (22); the circulation pump (22) is connected to the second pipeline (23); the second pipeline (23) is connected to the third pipeline (24); the third pipeline (24) is connected to the large circulation loop (3); and the waste liquid discharge pipeline (4) is connected to the second pipeline (23).

3. The chlorinated paraffin heat exchanger cleaning device according to claim 2, characterized in that: A first valve (61) is connected to the first pipeline (21) between the circulation pump (22) and the liquid distribution circulation tank (1).

4. The chlorinated paraffin heat exchanger cleaning device according to claim 2, characterized in that: A second valve (62) is connected to the second pipeline (23) between the circulation pump (22) and the third pipeline (24).

5. The chlorinated paraffin heat exchanger cleaning device according to claim 2, characterized in that: A third valve (63) is connected to the third pipeline (24) between the second pipeline (23) and the large circulation loop (3).

6. The chlorinated paraffin heat exchanger cleaning device according to claim 1, characterized in that: The large circulation loop (3) comprises a fourth pipeline (31), a plurality of first branch pipes (32), a plurality of second branch pipes (33), and a fifth pipeline (34); the fourth pipeline (31) is connected to the small circulation loop (2); a plurality of the first branch pipes (32) are connected to the fourth pipeline (31); the first branch pipe (32) is connected to a heat exchanger; the fifth pipeline (34) is connected to the liquid distribution circulation tank (1); and a plurality of the second branch pipes (33) are connected to the heat exchanger.

7. The chlorinated paraffin heat exchanger cleaning device according to claim 6, characterized in that: The first branch pipe (32) is connected to a fourth valve (64).

8. The chlorinated paraffin heat exchanger cleaning device according to claim 6, characterized in that: The second branch pipe (33) is connected to a fifth valve (65).

9. The chlorinated paraffin heat exchanger cleaning device according to claim 1, characterized in that: The waste liquid discharge pipeline (4) comprises a waste liquid discharge pipe (41) and a sixth valve (66) connected to the waste liquid discharge pipe (41), and the waste liquid discharge pipe (41) is connected to the small circulation loop (2).

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