A long-lasting filtering device for heat exchanger

Abstract

The invention discloses a long-acting filtering device for a heat exchanger, comprising a medium inlet pipe; a filter box, a collecting pipe and a supporting frame are sequentially arranged in the medium inlet pipe, and a plurality of filter holes are arranged on the end face of the filter box; the supporting frame is fixedly connected to the medium inlet pipe, a linear motor is fixedly arranged on the supporting frame, a filter is fixedly connected in the collecting pipe, an output shaft of the linear motor passes through the filter and is fixedly connected to a sliding frame in the medium inlet pipe, a motor is fixedly arranged on the sliding frame, an output shaft of the motor is connected to a cleaning plate through a swingable transmission member, and a plurality of columns are fixedly arranged at the outer end of the cleaning plate; a drain pipe is fixedly connected to the side wall of the collecting pipe, the drain pipe is located on the outer side of the filter in the axial direction of the collecting pipe, the outer end of the drain pipe passes through the side wall of the medium inlet pipe, and a valve is arranged on the drain pipe; the invention can effectively filter and clean impurities in the medium, can ensure heat exchange efficiency and long-term normal operation of the equipment, and does not require personnel to enter the equipment, disassemble the equipment and empty the medium, and has the advantage of low processing cost.

Description

Technical Field

[0001] The invention relates to a long-acting filtering device for a heat exchanger, in particular to a long-acting filtering device for an energy storage heat exchanger. Background Art

[0002] Heat exchanger, also known as heat exchanger, is a key equipment widely used in chemical, petroleum, power, food and many other industrial production. Its basic function is to realize heat transfer between fluids of different temperatures, that is, to effectively transfer part of the heat of hot fluid to cold fluid to achieve process purposes such as heating, cooling, evaporation or condensation. Heat exchangers play an indispensable role in improving production efficiency, optimizing energy utilization and ensuring product quality. Among them, shell and tube heat exchanger is a partition wall heat exchanger that uses the wall of the tube bundle enclosed in the shell as the heat transfer surface. Shell and tube heat exchanger has become one of the most widely used types of heat exchangers with its significant advantages such as simple structure, reliable operation, low cost, wide flow cross section and easy to clean scale.

[0003] With the development and green transformation of energy and chemical technology, the application of heat exchangers has been further promoted to new industries. Among them, heat exchangers play an important role in the air compression energy storage and molten salt energy storage industries. In traditional heat exchangers, water, oil, steam, synthesis gas, etc. are used as heat exchange media; the medium is usually processed by special medium treatment equipment and systems to remove impurities before entering the production and heat exchange system. However, in applications such as air compression and molten salt energy storage, the heat exchange medium simultaneously undertakes the functions of heat exchange and energy storage. During long-term storage, the medium inevitably contacts the environment outside the system and impurities are mixed into the medium. For example, the powdered dust on the surface of rock caves and artificial chambers in air compression energy storage, and the crystallization caused by air dust in molten salt. Compared with heat exchange equipment in traditional applications, more particulate / granular impurities will enter the heat exchanger in the above applications; however, existing heat exchangers are unable to filter impurities. When the heat exchange medium enters the heat exchanger, it is difficult to effectively filter impurities in the liquid or gas. This not only easily leads to thick accumulation of impurities inside the heat exchanger equipment, affecting the heat exchange efficiency, but also the impurity particles may cause unexpected wear of the equipment, affecting the service life and safety of the equipment. Summary of the invention

[0004] The purpose of the present invention is to provide a long-term filtering device for a heat exchanger in view of the above-mentioned deficiencies in the prior art, which can effectively filter and clean impurities in the medium, thereby ensuring the heat exchange efficiency and the long-term normal operation of the equipment, and does not require personnel to enter the equipment, disassemble the equipment and empty the medium, and has the advantage of low processing cost.

[0005] In order to achieve the above-mentioned purpose, a long-term filtering device of a heat exchanger of the present invention comprises a medium inlet pipe; it is characterized in that: a filter box, a collecting pipe and a supporting frame are arranged in sequence in the medium inlet pipe, a plurality of filter holes are arranged on the end face of the filter box, the outer diameter of the filter box and the collecting pipe is equal to the inner diameter of the medium inlet pipe, the supporting frame is fixedly connected to the medium inlet pipe, a linear motor is fixedly arranged on the supporting frame, a filter is fixedly connected in the collecting pipe, an output shaft of the linear motor passes through the filter and is fixedly connected to a sliding frame in the medium inlet pipe, a motor is fixedly arranged on the sliding frame, an output shaft of the motor is connected to a cleaning plate through a swingable transmission member, and a plurality of columns are fixedly arranged at the outer end of the cleaning plate; the filter, the sliding frame, the motor, the swingable transmission structure, the cleaning plate and the filter box are arranged in sequence from the inside to the outside, a drain pipe is fixedly connected to the side wall of the collecting pipe, the drain pipe is located on the outside of the filter in the axial direction of the collecting pipe, the outer end of the drain pipe passes through the side wall of the medium inlet pipe, and a valve is arranged on the drain pipe.

[0006] The swingable transmission mechanism may be a universal joint; the input shaft and output shaft of the universal joint are respectively connected to the output shaft of the motor and the cleaning plate; The swingable transmission mechanism can also be a joint bearing; the two end rods of the joint bearing are respectively connected to the output shaft of the motor and the cleaning plate; The filter screen box of the present invention can filter impurities in the medium of the inlet pipe; when it absorbs too many impurities / particles, the motor and the linear motor are started, and the motor drives the cleaning plate 10 to rotate and swing at a certain angle through the swingable transmission mechanism. At the same time, the linear motor 1 drives the motor and the cleaning plate to move axially through the sliding frame, and the filter screen box can be moved to scrape and clean the impurities on the filter screen box, so that the impurities fall into the collection pipe and are blocked in the collection pipe by the filter screen. At the same time, the valve of the sewage pipe is opened, and the impurity particles will be discharged from the sewage pipe along with part of the medium. In this process, the sliding frame driven by the linear motor to move axially generates disturbance in the collection pipe, which promotes the removal of impurity particles. It can be seen that the device can effectively filter and clean impurities in the medium, which can ensure the heat exchange efficiency and the long-term normal operation of the equipment, and there is no need for personnel to enter the equipment, disassemble the equipment and empty the medium, which has the advantage of low processing cost. As a further improvement of the present invention, the cleaning plate is provided with a plurality of connected blades, and a plurality of columns are fixedly provided at the outer end of each blade; the blade-type cleaning plate has a larger swing amplitude and has a better toggling effect; As a further improvement of the present invention, the sliding frame is a cross, and the inner wall of the medium inlet pipe is provided with four cross-shaped axial grooves, and the outer end of the cross is slidably arranged in the respective axial grooves; the movement of the cross can be guided to improve the cleaning and impurity removal effect; In summary, the present invention can effectively filter and clean impurities in the medium, ensure heat exchange efficiency and long-term normal operation of the equipment, and does not require personnel to enter the equipment, disassemble the equipment and empty the medium, which has the advantage of low processing cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] Figure 1 It is a three-dimensional diagram of a heat exchanger using an embodiment of the present invention.

[0008] Figure 2 It is a disassembled stereogram of an embodiment of the present invention.

[0009] Figure 3 for Figure 2 Exploded view of the parts inside the center tube. DETAILED DESCRIPTION

[0010] The present invention will be further described below with reference to the accompanying drawings, taking a BEU heat exchanger used in an air compression energy storage project as an example.

[0011] like Figure 1 The BEU type heat exchanger shown is a heat exchange device connecting the gas storage salt cavern outlet and the turbine equipment, and is used for preheating / preheating the high-pressure gas stored in the salt cavern before the turbine. The present invention can effectively filter the particulate matter brought out of the salt cavern, and at the same time protect the heat exchanger and the subsequent turbine equipment; the heat exchanger includes a shell 1, a pipe box 2 is provided on one side of the shell 1, a tube side medium inlet pipe 4 is provided on the top of the pipe box 2, and a tube side medium outlet pipe 3 is provided on the bottom, a shell side medium inlet pipe 5 is provided on the bottom of the shell 1, and a shell side medium outlet pipe 6 is provided on the top. The long-term filtering device of the present invention is arranged inside the tube side medium inlet pipe 4; like Figure 2 , Figure 3As shown, a long-term filtering device of a heat exchanger of this embodiment comprises a tube-side medium inlet pipe 4, a filter screen box 7, a collecting pipe 8 and a circular support frame 16 arranged in sequence in the pipe, a plurality of filter holes 17 are arranged on the end surface of the filter screen box 7, the outer diameters of the filter screen box 7 and the collecting pipe 8 are equal to the inner diameter of the medium inlet pipe 4, the support frame 16 is welded and fixedly connected to the medium inlet pipe 4, a linear motor 14 is fixedly arranged on the support frame 16, a filter screen (or filter plate) 15 is welded and fixedly connected in the collecting pipe 8, the aperture of the filter screen 15 is smaller than the aperture of the filter screen box 7, the output shaft of the linear motor 14 passes through the filter screen 15 and is fixedly connected to the cross 13 in the medium inlet pipe 4, the inner wall of the medium inlet pipe 4 is provided with four cross-shaped axial grooves 18, and the outer ends of the cross 13 are slidably arranged in the respective axial grooves 18; the cross 13 A motor 12 is fixedly arranged on the top, and the output shaft of the motor 12 is connected to the cleaning plate 10 through a universal joint 11 as a swingable transmission member, specifically: the input shaft of the universal joint 11 is connected to the output shaft of the motor, and the output shaft of the universal joint 11 is connected to the sleeve of the cleaning plate 10 through a pin shaft (not shown); the cleaning plate 10 is provided with three connected blades, and the outer end of each blade is fixed with a plurality of small-diameter columns 19; the support frame 16, the filter screen 15, the cross 13, the motor 12, the universal joint 11, the cleaning plate 10 and the filter screen box 7 are arranged in sequence from the inside to the outside in the medium inlet pipe 4, and the side wall of the collecting pipe 8 is fixedly connected with a drain pipe 9, and the drain pipe 9 is located on the outside of the filter screen 15 in the axial direction of the collecting pipe, and the outer end of the drain pipe 9 passes through the side wall of the medium inlet pipe 4, and a valve (not shown) is provided on the drain pipe 9.

[0012] During the normal operation of the heat exchanger, the filter box 7 can filter the impurities in the tube side medium inlet pipe 4, and the motor 12, linear motor 14, cleaning plate 10, etc. remain stationary and work; on the other hand, since the filter box 7 has completed the impurity filtering, the filter 15 does not perform the filtering function at this time; after the equipment has been running for a period of time, the filter box 7 will increase the resistance due to long-term filtering and adsorption of too many impurities or particles, and the equipment will discharge sewage at this time; under the sewage discharge condition, the valve in the system pipeline is adjusted to increase the tube side medium resistance, and the motor 12 and the linear motor 14 are started. The motor 12 drives the cleaning plate 10 to rotate and swing at a certain angle through the universal joint 11. At the same time, the linear motor 14 drives the motor 12, the universal joint 11 and the cleaning plate 10 to move axially through the cross 13, and the filter box 7 can be moved to scrape and clean the impurities on the filter box 7, so that the impurities fall into the collection In the collecting pipe 8, since the aperture of the filter screen 15 is smaller than that of the filter screen box 7, the impurities are blocked by the filter screen 15 in the collecting pipe 8. At the same time, the valve of the sewage pipe 20 is opened, and the impurity particles will be discharged from the sewage pipe 20 to the outside of the medium circuit along with part of the medium. In this process, the cross 13 driven by the linear motor 14 to move axially generates disturbance in the collecting pipe 8, which promotes the removal of impurity particles. After the impurities are cleaned from the filter box 7, the filter screen box 7 automatically restores the filtering function. It can be seen that the device can effectively filter and clean the impurities in the medium, ensure the heat exchange efficiency and the long-term normal operation of the equipment, and does not require personnel to enter the equipment, disassemble the equipment and empty the medium, which has the advantage of low processing cost; the blade-type cleaning plate 10 has a large swing amplitude and a better toggle effect, and the four cross-shaped axial grooves 18 can guide the movement of the cross 13 to improve the cleaning and impurity removal effect; If the present invention is used for liquid heat exchange medium, the linear motor 14 and the motor 12 need to be waterproof motors. If compressed air is used as the energy storage medium, the two motors do not need to be waterproof. In molten salt applications, a sealed high-temperature resistant motor must be used. The filter box 7 and the collection pipe 8 can be fixedly connected. The filter box 7 is a thin-walled part. When it is moved, the impurities on it are scraped off and cleaned through elastic deformation. The filter box 7 can also be placed only on the collection pipe 8. When it is moved, the filter box 7 can swing to a large extent, which is conducive to cleaning impurities. The present invention is not limited to the above-mentioned embodiments. For example, according to the working conditions of the two heat exchange media, the filter device can also be simultaneously arranged inside the shell-side medium inlet pipe 5; the above-mentioned swingable transmission mechanism is also replaced by a spherical bearing; The above embodiments have been described, but it should be understood that the above embodiments are only for the purpose of example and description, and are not intended to limit the present invention to the scope of the described embodiments.

Claims

1. A long-term filtering device for a heat exchanger, comprising a medium inlet pipe; characterized in that: A filter box, a collecting tube and a support frame are sequentially arranged in the medium inlet pipe. A plurality of filter holes are arranged on the end face of the filter box. The outer diameters of the filter box and the collecting tube are equal to the inner diameter of the medium inlet tube. The support frame is fixedly connected to the medium inlet tube. A linear motor is fixedly arranged on the support frame. A filter is fixedly connected in the collecting tube. The output shaft of the linear motor passes through the filter and is fixedly connected to the sliding frame in the medium inlet tube. A motor is fixedly arranged on the sliding frame. The output shaft of the motor is connected to a cleaning plate through a swingable transmission member. A plurality of columns are fixedly arranged at the outer end of the cleaning plate. The filter, sliding frame, motor, swingable transmission structure, cleaning plate and filter box are sequentially arranged from the inside to the outside. A drain pipe is fixedly connected to the side wall of the collecting tube. The drain pipe is located on the outside of the filter in the axial direction of the collecting tube. The outer end of the drain pipe passes through the side wall of the medium inlet tube. A valve is arranged on the drain pipe.

2. The long-lasting filtering device for a heat exchanger according to claim 1, characterized in that: The swingable transmission structure is a universal joint.

3. The long-lasting filtering device for a heat exchanger according to claim 1, characterized in that: The swingable transmission structure is a spherical bearing.

4. A long-lasting filtration device for a heat exchanger according to any one of claims 1 to 3, characterized in that: The cleaning plate is provided with a plurality of connected blades, and a plurality of columns are fixedly provided at the outer end of each blade.

5. The long-lasting filtering device for a heat exchanger according to claim 4, characterized in that: The sliding frame is a cross, and the inner wall of the medium inlet pipe is provided with four cross-shaped axial grooves, and the outer ends of the cross are slidably arranged in the respective axial grooves.

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