Device for cleaning inner cavity of tube bundle of tube type heat exchanger

Abstract

The utility model relates to a tube bundle inner cavity cleaning device for a tube type heat exchanger, which comprises a purging tube, the purging tube comprises an air inlet tube part, an air guide tube part and an air outlet tube part, the air inlet tube part, the air guide tube part and the air outlet tube part are detachably connected through tube joints, the peripheries of the tube joints are cylindrical, the tail part of the air inlet tube part is connected with an air inlet joint, and the tail part of the air outlet tube part is connected with an air outlet joint. The air inlet connector is connected with a steam source through a hose, and an air outlet is formed in the front end of the air outlet pipe part. According to the utility model, the inner cavity of the slender heat exchanger tube bundle can be cleaned and pushed and scraped along the inner cavity of the heat exchanger tube bundle, heat generated by steam can change the physical state of sediments, part of impurities are converted into liquid, part of liquid impurities are blown out in the pushing and sweeping process of steam under pressure, and the peripheries of the tube joints play a role of scraping blocks, so that solid sediments can be effectively scraped out. Scale in the heat exchanger tube bundle inner cavity is effectively removed, working efficiency of the heat exchanger is improved, and stable operation of the heat exchanger is guaranteed.

Description

Technical Field

[0001] The utility model relates to the field of cleaning heat exchangers, in particular to a device for cleaning the inner cavity of a tube bundle of a tube-in-tube heat exchanger. Background Art

[0002] The water ring vacuum pump relies on the change of the pump chamber volume to achieve suction, compression and exhaust. It is a variable volume vacuum pump. The condensate in the vacuum pump gas-liquid separator is used as the impeller working fluid in the pump body. When the impeller rotates clockwise, water is thrown around by the impeller. Due to the centrifugal force, the working fluid forms a closed circular ring of approximately equal thickness. The upper inner surface of the water ring is just tangent to the impeller hub, and the lower inner surface of the water ring is just in contact with the top of the blade. At this time, a crescent-shaped space is formed between the impeller hub and the water ring. When the impeller rotates 180 degrees, the volume surrounded by adjacent blades gradually increases, and the gas is sucked in from the outside. After continuing to rotate, the corresponding volume changes from large to small, and the gas is squeezed. When the pressure is greater than the pressure on the discharge side, the gas is discharged. As the temperature of the vacuum pump working fluid increases, the corresponding saturation pressure will also rise. When the vacuum pump suction pressure is less than or equal to the corresponding saturation pressure, vaporization will occur, and the liquid will be converted into a vapor state, resulting in increased gas accumulation in the pump chamber, and collisions in the pump chamber, resulting in low vacuum or the pumping volume cannot meet the required requirements. Once the vacuum pump cavitation phenomenon occurs, the vaporized bubbles formed will impact the vacuum pump impeller due to fragmentation, seriously affecting the equipment's operating efficiency and safety. Therefore, ensuring the working efficiency of the vacuum pump working fluid heat exchanger plays an important role in the operation of the vacuum pump.

[0003] The existing water ring vacuum pump heat exchanger has a tube bundle length of more than 4m and an inner diameter of less than 30mm. There are many impurities accumulated in the tube bundle. When overhauling, flushing the inner cavity of the tube bundle with steam or water cannot completely and effectively clean the impurities accumulated inside the heat exchanger tube bundle, affecting the operation of the heat exchanger. Summary of the invention

[0004] The technical problem to be solved by the utility model is to provide a cleaning device for the inner cavity of a tube bundle of a tube-in-tube heat exchanger, so as to solve the problem that it is difficult to clean the inner cavity of the tube bundle of the heat exchanger.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A device for cleaning the inner cavity of a tube bundle of a shell-and-tube heat exchanger comprises a purge pipe, wherein the purge pipe comprises an air inlet pipe portion, an air guide pipe portion, and an air outlet pipe portion. The air inlet pipe portion, the air guide pipe portion, and the air outlet pipe portion are detachably connected by pipe joints, the outer circumference of the pipe joints is cylindrical, the tail of the air inlet pipe portion is connected to the air inlet joint, the air inlet joint is connected to a steam source via a hose, and an air outlet is provided at the front end of the air outlet pipe portion.

[0007] The described pipe joint is fixedly connected to the ends of the air guide pipe section and the air outlet pipe section. The pipe joint is provided with an internal thread hole, and the air inlet pipe section, the air guide pipe section and the air outlet pipe section are connected by the external thread on the pipe body matching with the internal thread on the pipe joint.

[0008] The outer diameter of the described pipe joint is 2 - 3 mm smaller than the inner cavity diameter of the tube bundle of the shell-and-tube heat exchanger.

[0009] The outer peripheral surface of the described pipe joint is a rough surface.

[0010] The outer end of the described air inlet pipe section is connected to a handrail.

[0011] The described air guide pipe section is one section or multiple sections.

[0012] Compared with the existing technology, the beneficial effects of the present utility model are as follows:

[0013] The present utility model can clean the inner cavity of the slender heat exchanger tube bundle, scrape along the inner cavity of the heat exchanger tube bundle. The heat generated by the steam can change the physical state of the sediment, and part of the impurities turn into liquid state. During the pushing and sweeping process of the pressurized steam, some liquid impurities are blown out. The outer periphery of the pipe joint acts as a scraping block and can effectively scrape off the solid sediment. It can effectively remove the scale in the inner cavity of the heat exchanger tube bundle, improve the working efficiency of the heat exchanger, and ensure the stable operation of the heat exchanger.

[0014] The present utility model is assembled and used, and does not occupy space after disassembly, which is convenient for storage. Description of the Drawings

[0015] Figure 1 is a schematic structural diagram of the present utility model.

[0016] Figure 2 is a schematic structural diagram of the air outlet pipe section.

[0017] Figure 3 is an overall schematic diagram of the present utility model.

[0018] In the figure: air inlet pipe section 1, air guide pipe section 2, air outlet pipe section 3, pipe joint 4, air inlet joint 5, hose 6, air outlet 7, handrail 8. Detailed Embodiments

[0019] In the description of the present utility model, it should be understood that the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first", "second", etc. may explicitly or implicitly include one or more of such features. In the description of the present utility model, unless otherwise specified, the meaning of "a plurality" is two or more.

[0020] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", and "coupling" 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 an indirect connection through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0021] A cleaning device for the inner cavity of a tube bundle of a shell-and-tube heat exchanger, comprising a purging tube. The purging tube includes an air inlet pipe portion 1, a gas guiding pipe portion 2, and an air outlet pipe portion 3. The air inlet pipe portion 1, the gas guiding pipe portion 2, and the air outlet pipe portion 3 are detachably connected by a pipe joint 4. The outer periphery of the pipe joint is cylindrical. The tail of the air inlet pipe portion 1 is connected to an air inlet joint 5, and the air inlet joint 5 is connected to a steam source through a hose 6. An air outlet 7 is provided at the front end of the air outlet pipe portion 3.

[0022] The pipe joint 4 is fixedly connected to the ends of the gas guiding pipe portion 2 and the air outlet pipe portion 3. The pipe joint 4 is provided with an internal threaded hole. The air inlet pipe portion 1, the gas guiding pipe portion 2, and the air outlet pipe portion 3 are connected by the external thread on the pipe body and the internal thread on the pipe joint 4.

[0023] The outer diameter of the pipe joint 4 is 2 - 3 mm smaller than the inner diameter of the tube bundle of the shell-and-tube heat exchanger.

[0024] The outer peripheral surface of the pipe joint 4 is a rough surface, which is used to scrape off the sediment impurities in the inner cavity of the tube bundle of the shell-and-tube heat exchanger.

[0025] The outer end of the air inlet pipe portion 1 is connected to a handrail 8.

[0026] The gas guiding pipe portion 2 is one section or multiple sections.

[0027] Install the cleaning device according to the required length. After connecting the cleaning steam, insert it into the inner cavity of the heat exchanger tube bundle, and push and scrape from one side to the other side along the heat exchanger tube bundle. The heat generated by the steam can change the physical state of the sediment, and part of the impurities are transformed into a liquid state. During the pushing and sweeping process of the pressurized steam, a part of the liquid impurities are blown out. The outer periphery of the pipe joint acts as a scraping block, and can effectively scrape off the solid sediment.

[0028] To make the purpose, technical solution, and technical effects of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be described clearly and completely now. However, the embodiments described below are only a part of the embodiments of the present utility model, rather than all of the embodiments. Combining the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present utility model. Embodiment

[0029] A cleaning device for the inner cavity of a tube bundle of a shell-and-tube heat exchanger, comprising a purging tube with a length of 5200 mm. The purging tube includes an air inlet pipe portion 1, a gas guide pipe portion 2, and an air outlet pipe portion 3. A pipe joint 4 is fixedly connected to the ends of the gas guide pipe portion 2 and the air outlet pipe portion 3. The pipe joint 4 is provided with an internal thread hole, and the air inlet pipe portion 1, the gas guide pipe portion 2, and the air outlet pipe portion 3 are connected by the external thread on the pipe body cooperating with the internal thread on the pipe joint 4. The gas guide pipe portion 2 is divided into two detachably connected sections.

[0030] The outer periphery of the pipe joint 4 is cylindrical, and the outer diameter of the pipe joint 4 is 18 mm, which is 2 mm smaller than the inner diameter of the tube bundle of the shell-and-tube heat exchanger. The outer peripheral surface of the pipe joint 4 is machined with patterns.

[0031] The tail of the air inlet pipe portion 1 is connected to an air inlet joint 5, and the air inlet joint 5 is connected to a steam gas source through a hose 6. The outer end of the air inlet pipe portion 1 is connected to a handrail 8.

[0032] The front end of the air outlet pipe portion 3 is provided with an air outlet 7. Embodiment

[0033] A cleaning device for the inner cavity of a tube bundle of a shell-and-tube heat exchanger, comprising a purging tube with a length of 5000 mm. The purging tube includes an air inlet pipe portion 1, a gas guide pipe portion 2, and an air outlet pipe portion 3. A pipe joint 4 is fixedly connected to the ends of the gas guide pipe portion 2 and the air outlet pipe portion 3. The pipe joint 4 is provided with an internal thread hole, and the air inlet pipe portion 1, the gas guide pipe portion 2, and the air outlet pipe portion 3 are connected by the external thread on the pipe body cooperating with the internal thread on the pipe joint 4. The gas guide pipe portion 2 is divided into two detachably connected sections. The diameter of the pipe body at the tail of the air inlet pipe portion 1 is 45 mm and the length is 200 mm.

[0034] The outer periphery of the pipe joint 4 is cylindrical, and the outer diameter of the pipe joint 4 is 18 mm, which is 2 mm smaller than the inner diameter of the tube bundle of the shell-and-tube heat exchanger. The outer peripheral surface of the pipe joint 4 is machined with patterns.

[0035] The tail of the air inlet pipe portion 1 is connected to an air inlet joint 5, and the air inlet joint 5 is connected to a steam gas source through a hose 6. The outer end of the air inlet pipe portion 1 is connected to a handrail 8.

[0036] The front end of the air outlet pipe portion 3 is provided with an air outlet 7.

[0037] Although the embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A device for cleaning the inner cavity of a tube bundle of a shell-and-tube heat exchanger, characterized in that: It includes a purge pipe, which includes an air inlet pipe part, an air guide pipe part, and an air outlet pipe part. The air inlet pipe part, the air guide pipe part and the air outlet pipe part are detachably connected by pipe joints. The outer circumference of the pipe joint is cylindrical. The tail of the air inlet pipe part is connected to the air inlet joint. The air inlet joint is connected to a steam gas source through a hose. An air outlet is provided at the front end of the air outlet pipe part.

2. The device for cleaning the inner cavity of a tube bundle of a shell-and-tube heat exchanger according to claim 1, characterized in that: The pipe joint is fixedly connected to the ends of the air guide pipe and the air outlet pipe. An internal thread hole is provided on the pipe joint. The air inlet pipe, the air guide pipe and the air outlet pipe are connected through the external thread on the pipe body and the internal thread on the pipe joint.

3. The device for cleaning the inner cavity of a tube bundle of a shell-and-tube heat exchanger according to claim 1, characterized in that: The outer diameter of the pipe joint is 2-3 mm smaller than the inner diameter of the tube bundle of the shell-and-tube heat exchanger.

4. The device for cleaning the inner cavity of a tube bundle of a shell-and-tube heat exchanger according to claim 1, characterized in that: The outer peripheral surface of the pipe joint is a rough surface.

5. The device for cleaning the inner cavity of a tube bundle of a shell-and-tube heat exchanger according to claim 1, characterized in that: The outer end of the air inlet pipe portion is connected to the handrail.

6. The device for cleaning the inner cavity of a tube bundle of a shell-and-tube heat exchanger according to claim 1, characterized in that: The air guide tube portion is composed of one section or multiple sections.

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