A high-temperature tube heat exchanger capable of automatic cleaning

Abstract

The present application relates to a high-temperature tubular heat exchanger capable of automatic cleaning, which comprises a frame, a shell is arranged on the frame, a feed head and a discharge head are arranged at both ends of the shell, a tube sheet is arranged at the connection between the shell and the feed head, a tube sheet with the same structure is arranged at the connection between the shell and the discharge head, a feed cavity is formed between the feed head and the tube sheet, a discharge cavity is formed between the discharge head and the tube sheet, a cooling cavity for cold flow to pass through is formed between the two tube sheets and the shell, a plurality of guide pipes are arranged between the two tube sheets, a water inlet pipe is fixedly connected to one side of the shell near the discharge head, and a water outlet pipe is arranged on one side of the shell near the feed head; a descaling mechanism is arranged in the shell; the descaling mechanism comprises an ultrasonic generator arranged in the shell, a plurality of resonance plates are arranged in the shell, a plurality of wing plates are arranged on the resonance plate, and the resonance plate is an elastic steel plate. The present application has the effect of automatically removing scale from the inner wall of the shell and the inner and outer walls of the tube body without affecting the heat exchange efficiency.

Description

Technical Field

[0001] The present application relates to the technical field of heat exchangers, and in particular to a high-temperature tubular heat exchanger capable of automatic cleaning. Background Art

[0002] A high temperature heat exchanger is a device that can be used to cool and recover heat from large-flow high-temperature flue gas.

[0003] The tubular heat exchanger (also known as shell and tube, tube-in-tube) is the most typical partition-type heat exchanger. It has a long history of industrial application and still occupies a dominant position among all heat exchangers. The tubular heat exchanger is mainly composed of the shell, tube bundle, tube sheet and head. The shell is mostly circular, with parallel tube bundles inside, and the two ends of the tube bundle are fixed to the tube sheet. The two fluids that exchange heat in the tubular heat exchanger, one flows inside the tube, and its travel is called the tube side; the other flows outside the tube, and its travel is called the shell side.

[0004] After a long period of use, the cold fluid in the tubular heat exchanger will be heated and precipitated or debris will be precipitated. The precipitated precipitation will adhere to and accumulate on the inner wall of the shell and the inner and outer walls of the tube body. It is easy to scale on the inner wall of the shell and the inside and outside of the pipe. When the scale accumulates to a certain thickness, it will greatly affect the heat transfer efficiency. Therefore, designing a tubular heat exchanger that can automatically remove scale is an urgent problem to be solved. Summary of the invention

[0005] In order to automatically remove scale from the inner wall of the shell and the inner and outer walls of the tube body without affecting the heat exchange efficiency, the present application provides a high-temperature tubular heat exchanger that can be automatically cleaned.

[0006] The present application provides a high-temperature tubular heat exchanger capable of automatic cleaning, which adopts the following technical solution:

[0007] A high-temperature tube heat exchanger capable of automatic cleaning comprises a frame, a shell is arranged on the frame, a feed seal and a discharge seal are arranged at two ends of the shell respectively, a feed pipe is connected to the feed seal, a discharge pipe is connected to the discharge seal, a tube sheet is arranged at the connection between the shell and the feed seal, a tube sheet with the same structure is arranged at the connection between the shell and the discharge seal, a feed cavity is formed between the feed seal and the tube sheet, and a discharge cavity is formed between the discharge seal and the tube sheet; a cooling cavity for cold flow to pass through is formed between the two tube sheets and the shell, a plurality of guide pipes are arranged between the two tube sheets, and the two ends of the guide pipes are communicated with the feed cavity and the discharge cavity respectively, a water inlet pipe is fixedly connected to one side of the shell close to the discharge seal, and a water outlet pipe is arranged on one side of the shell close to the feed seal; a descaling mechanism is arranged in the shell; the descaling mechanism comprises an ultrasonic generator arranged in the shell, a plurality of resonance plates are arranged in the shell, a plurality of wing plates are arranged on the resonance plate, and the resonance plate is an elastic steel plate.

[0008] By adopting the above technical solution, when the user uses it, the hot flow is introduced into the feed cavity through the feed pipe, the hot flow in the feed cavity enters each guide pipe respectively, and the cold flow enters the cooling cavity through the water inlet pipe, and the cold flow in the cooling cavity and the hot flow in the guide pipe perform heat exchange, and the ultrasonic wave generated by the ultrasonic generator causes the fluid in the shell to produce cavitation, acceleration and straight flow effects to directly and indirectly affect the scale, that is, the ultrasonic wave generates a large number of tiny bubbles in the liquid, these bubbles grow rapidly and suddenly burst under the action of the ultrasonic wave, generating strong shock waves and high-speed microjets, thereby peeling off and dispersing the scale; in addition, when the ultrasonic wave propagates in the liquid, an acceleration force is generated, which can cause the liquid molecules to move violently, thereby enhancing the cleaning effect on the inner wall of the shell and the outer wall of the guide pipe, and the straight flow effect generated by the ultrasonic wave in the liquid can cause the cold flow to form a circulating flow in the shell, so that the scale is dispersed, emulsified and peeled off to achieve the cleaning purpose, further enhancing the scale The ultrasonic generator can achieve a good cleaning effect. Moreover, when the ultrasonic frequency emitted by the ultrasonic generator is close to the natural frequency of the resonance plate, the resonance plate can be caused to resonate, causing the resonance plate to vibrate strongly. The vibration of the resonance plate can stir the cold flow, causing the cold flow to churn in the shell and slap the inner wall of the shell and the outer wall of the guide tube, thereby flushing down the scale on the inner wall of the shell and the outer wall of the guide tube, so as to achieve a better descaling effect. In addition, the resonance plate resonates under the action of the ultrasonic wave, and the wing plate will vibrate along with the resonance plate, thereby vibrating and stirring the cold flow, further increasing the impact of the cold flow on the inner wall of the shell. When cleaning the inner wall of the shell, the impact force of the cold flow flushes down the scale on the inner wall of the shell, achieving the effect of cleaning the scale on the inner wall of the shell; through the cooperation of the ultrasonic generator, the resonance plate and the wing plate, when exchanging heat, the contact area between the cold flow and the guide tube can be increased, and the heat exchange efficiency can be improved. When cleaning scale, the scale on the inner wall of the shell and the outer wall of the guide tube can be cleaned efficiently and quickly without affecting the heat exchange efficiency.

[0009] Optionally, the number of the ultrasonic generators is two.

[0010] By adopting the above technical solution, when the user uses it, when the two waves emitted by the two ultrasonic generators meet, their amplitudes are added in some areas and subtracted in other areas, thereby forming a wave reinforcement area and a wave weakening area. Since the reinforcement area and the weakening area are not continuous areas, the cold flow in the shell forms turbulence in the shell, causing the cold flow to have a greater impact on the inner wall of the shell and the outer wall of the guide tube, flushing down the scale on the inner wall of the shell and the outer wall of the guide tube, so that the descaling effect is better.

[0011] Optionally, a step groove is provided at the position of the tube plate corresponding to the material guide tube, two arc-shaped elastic plates are clamped in the step groove, and two vibration plates are fixedly connected to the ends of the elastic plates, and the vibration plates are elastic steel plates.

[0012] By adopting the above technical solution, when the user uses it, the ultrasonic wave emitted by the ultrasonic generator causes the elastic plate and the vibration plate to resonate, causing the vibration plate to vibrate strongly. The vibration of the vibration plate can stir the heat source entering the material guide pipe, so that the kinetic energy of the heat flow entering the material guide pipe is converted into fluctuations in speed and pressure, thereby forming turbulence, causing the fluid entering the material guide pipe to hit the inner wall of the material guide pipe, causing an impact between the fluid and the inner wall of the material guide pipe, and then flushing down the scale on the inner wall of the material guide pipe, thereby achieving the effect of descaling the inner wall of the material guide pipe.

[0013] Optionally, a transmission rod is provided in the material guiding tube, the transmission rod is an elastic steel plate, the end of the transmission rod is fixedly connected to a limiting rod, and the limiting rod is clamped in the step groove.

[0014] By adopting the above technical solution, when the user uses it, the impact of the heat flow causes the transmission rod to vibrate, and the transmission rod stirs the heat flow in the guide tube, causing the heat flow to impact the inner wall of the guide tube. During heat exchange, the contact area between the heat flow and the inner wall of the guide tube is increased, thereby improving the heat exchange efficiency. When cleaning scale, the scale on the inner wall of the guide tube can be flushed off. During cleaning, the heat flow used can be replaced with water or other fluids.

[0015] Optionally, the outer sleeve of the material guide tube is provided with a fixing ring, which is rotatably connected to the outside of the material guide tube, and two stirring rods are arranged between the fixing rings, and the stirring rods are used to connect and fix the fixing rings. A plurality of spiral stirring shafts are arranged outside the stirring rods, and the stirring shaft sleeve is arranged outside the material guide tube. A reinforcing rod is fixedly connected to the stirring shaft, and the end of the reinforcing rod away from the stirring shaft is fixed to the stirring rod, and the reinforcing rod is used to connect and fix the stirring shaft and the stirring rod.

[0016] By adopting the above technical solution, when the user uses it, after the cold flow enters the shell, the cold flow impacts the stirring rod and the stirring shaft, causing the stirring shaft to rotate outside the guide tube. The stirring shaft automatically stirs the cold flow, causing the cold flow to churn in the shell. When cleaning scale, the scale on the inner wall of the shell and the outer wall of the guide tube is washed down. During heat exchange, the contact area between the cold flow and the outer wall of the guide tube is increased, resulting in a better heat exchange effect.

[0017] Optionally, the shell is provided with a plurality of deflector baffles which are arranged perpendicular to the axial direction of the material guide tube, one side of the deflector baffle is fixedly connected to the inner wall of the shell, and the other end is arranged as a free end, the center of the free end of the deflector baffle is located on the axial center line of the shell, and adjacent deflector baffles are respectively arranged on the symmetrical inner walls of the shell to form a serpentine flow channel between the deflector baffles.

[0018] By adopting the above technical solution, when the user uses it, a serpentine flow channel is formed between adjacent deflection baffles, which not only increases the flow path of the cold flow, but also increases the contact area between the cold flow and the guide tube, thereby improving the heat exchange efficiency.

[0019] Optionally, a positioning plate is fixedly connected to one end of the shell corresponding to the feed chamber, and a circular hole is opened on the positioning plate for the guide tube to pass through. A limiting ring is fixedly connected to the end of the guide tube, and the diameter of the limiting ring is larger than the diameter of the circular hole.

[0020] By adopting the above technical solution, when the user disassembles and installs the material guide pipe, the tube plate is removed, and the material guide pipe can be removed from the positioning plate, which is convenient for disassembly and installation of the material guide pipe, so that the material guide pipe can be removed to clean the scale on the material guide pipe, or a new material guide pipe can be directly replaced.

[0021] Optionally, the outer side wall of the shell is provided with a sound insulation layer.

[0022] By adopting the above technical solution, when the user uses it, the sound insulation layer is wrapped around the outer wall of the shell, which can reduce the outward propagation of noise generated by the impact of the fluid and the inner wall of the shell.

[0023] Optionally, a plurality of sewage outlets are provided at the bottom of the shell, plugs are inserted into the sewage outlets, and the plugs are fixed to the shell by bolts.

[0024] By adopting the above technical solution, when the user uses it, part of the scale cleaned is taken away by the fluid, and part of the scale will be deposited at the bottom of the shell. Opening the plug can facilitate the discharge of the scale deposited at the bottom of the shell.

[0025] In summary, the present application includes at least one of the following beneficial technical effects:

[0026] 1. By setting an ultrasonic sensor, a resonance plate is set in the shell, and a wing plate is set on the resonance plate. The ultrasonic wave generated by the ultrasonic generator causes the fluid in the shell to produce cavitation, acceleration and straight flow to directly and indirectly affect the scale. The straight flow effect generated by the ultrasonic wave in the liquid can make the cold flow form a circulation flow in the shell, so that the scale is dispersed, emulsified, and peeled off to achieve cleaning, and the inner wall of the shell and the inner and outer walls of the guide pipe are descaled. At the same time, the ultrasonic wave emitted by the ultrasonic generator causes the resonance of the resonance plate, which makes the resonance plate vibrate strongly, and the The vibration of the vibration plate can stir the cold flow, and the wing plate will vibrate along with the resonance plate, thereby vibrating and stirring the cold flow, further increasing the impact of the cold flow and the inner wall of the shell. When cleaning the inner wall of the shell, the impact force of the cold flow will wash down the scale on the inner wall of the shell, achieving the effect of cleaning the scale on the inner wall of the shell; through the cooperation of the ultrasonic generator, the resonance plate and the wing plate, during heat exchange, the contact area between the cold flow and the guide pipe can be increased, the heat exchange efficiency can be improved, and when cleaning the scale, the scale on the inner wall of the shell and the outer wall of the guide pipe can be cleaned efficiently and quickly without affecting the heat exchange efficiency;

[0027] 2. A step groove is arranged at the position of the tube sheet corresponding to the guide tube, and two arc-shaped elastic plates are clamped in the step groove. Two vibration plates are fixedly connected at the ends of the elastic plates. The vibration plates are elastic steel plates. When the ultrasonic waves emitted by the ultrasonic generator cause the elastic plates and the vibration plates to resonate, the vibration plates will vibrate strongly. The vibration of the vibration plates can stir the heat source entering the guide tube, so that the kinetic energy of the heat flow entering the guide tube is converted into the fluctuation of speed and pressure, thus forming turbulence, so that the fluid entering the guide tube beats the inner wall of the guide tube, so that the fluid and the inner wall of the guide tube are impacted, and then the scale on the inner wall of the guide tube is washed down, so as to achieve the effect of descaling the inner wall of the guide tube;

[0028] 3. A plurality of fixed rings are arranged on the outer sleeve of the material pipe, the fixed rings are rotatably connected to the outside of the material guide pipe, two stirring rods are arranged between the fixed rings, a plurality of spiral stirring shafts are arranged outside the stirring rods, and a reinforcing rod is fixedly connected to the stirring shafts. When the cold flow enters the shell, the impact of the cold flow on the stirring rods and the stirring shafts causes the stirring shafts to rotate outside the material guide pipe, and the stirring shafts automatically stir the cold flow, causing the cold flow to churn in the shell. When cleaning scale, the scale on the inner wall of the shell and the outer wall of the material guide pipe is washed down. When exchanging heat, the contact area between the cold flow and the outer wall of the material guide pipe is increased, and the heat exchange effect is better. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application;

[0030] Figure 2 is a cross-sectional view of an embodiment of the present application;

[0031] Figure 3 yes Figure 2 A magnified view of part A;

[0032] Figure 4 This is a cross-sectional view made to highlight the ultrasonic generator;

[0033] Figure 5 It is a schematic diagram of the structure of the baffle plate and the resonance plate;

[0034] Figure 6 This is an exploded view of the guide tube;

[0035] Figure 7 yes Figure 6 Enlarged view of part B.

[0036] Explanation of the reference numerals: 1. frame; 2. shell; 20. drain outlet; 201. plug; 21. feed head; 211. feed pipe; 22. discharge head; 221. discharge pipe; 23. tube sheet; 231. step groove; 24. feed chamber; 25. discharge chamber; 26. cooling chamber; 27. water inlet pipe; 28. water outlet pipe; 29. ​​deflector baffle; 291. through hole; 292. positioning plate; 293. circular hole; 3. guide pipe; 31. limit ring; 4. descaling mechanism; 41. ultrasonic generator; 42. resonance plate; 421. wing plate; 43. elastic plate; 431. vibration plate; 44. transmission rod; 441. limit rod; 45. fixing ring; 451. stirring rod; 452. stirring shaft; 453. reinforcing rod; 46. sound insulation layer. DETAILED DESCRIPTION

[0037] The following is combined with Figure 1-7 This application is described in further detail.

[0038] The present application embodiment discloses a high temperature tubular heat exchanger capable of automatic cleaning, referring to Figure 1 and Figure 2 , comprising a frame 1, a shell 2 is fixedly connected to the top of the frame 1, the shell 2 is cylindrical, the two ends of the shell 2 are hollow, the two ends of the shell 2 are respectively connected to a feed head 21 and a discharge head 22, the end of the feed head 21 away from the discharge head 22 is fixedly connected to a feed pipe 211, and the end of the discharge head 22 away from the feed head 21 is fixedly connected to a discharge pipe 221; a tube sheet 23 is provided at the connection between the shell 2 and the feed head 21, and a tube sheet 23 with the same structure is provided at the connection between the shell 2 and the discharge head 22, a feed cavity 24 is formed between the feed head 21 and the tube sheet 23, and the discharge head 22 and the tube sheet 23 are connected to each other. A discharge cavity 25 is formed between the two tube sheets 23; a cooling cavity 26 for cold flow to pass through is formed between the two tube sheets 23 and the shell 2; a plurality of guide pipes 3 are arranged between the two tube sheets 23; the axes of the guide pipes 3 are parallel to each other; both ends of the guide pipes 3 are respectively connected to the tube sheets 23, and the two ends of the tube sheets 23 are respectively connected to the feed cavity 24 and the discharge cavity 25; a water inlet pipe 27 is fixedly connected to one side of the shell 2 close to the discharge head 22, and a water outlet pipe 28 is arranged on one side of the shell 2 close to the feed head 21, wherein the water inlet pipe 27 and the water outlet pipe 28 are both connected to the cooling cavity 26, and the water outlet pipe 28 and the water inlet pipe 27 are respectively located on two symmetrical sides of the shell 2.

[0039] During heat exchange, the hot flow is introduced into the feed chamber 24 through the feed pipe 211, the hot flow in the feed chamber 24 enters each guide pipe 3 respectively, and the cold flow enters the cooling chamber 26 through the water inlet pipe 27. The cold flow in the cooling chamber 26 and the hot flow in the guide pipe 3 perform heat exchange to achieve the final heating or cooling.

[0040] A plurality of deflector baffles 29 are arranged in the shell 2. The deflector baffles 29 are arranged perpendicular to the axial direction of the material guide tube 3. A through hole 291 is opened on the deflector baffle 29 for the material guide tube 3 to pass through, so that there is no interference between the deflector and the material guide tube 3; wherein the deflector baffles 29 are semicircular, the arc portion of the deflector baffle 29 is fixedly connected to the inner wall of the shell 2, the center of the horizontal portion of the deflector baffle 29 is located on the axial line of the shell 2, and the deflector baffles 29 are respectively arranged on the symmetrical inner walls of the shell 2, so that a serpentine flow channel is formed between adjacent deflector baffles 29, which not only increases the flow path of the cold flow, but also increases the contact area between the cold flow and the material guide tube 3, thereby improving the heat exchange efficiency.

[0041] Among them, refer to Figure 3 In order to facilitate the replacement of the guide tube 3, a positioning plate 292 is fixedly connected to one end of the shell 2 corresponding to the feed chamber 24. The positioning plate 292 is provided with a circular hole 293 for the guide tube 3 to pass through at the position of the guide tube 3. The end of the guide tube 3 is fixedly connected to a limiting ring 31. The diameter of the limiting ring 31 is larger than the diameter of the circular hole 293, so that the guide tube 3 is conveniently clamped in the circular hole 293. Then, the tube sheet 23 is bolted to the positioning plate 292 to fix the guide tube 3. When disassembling and installing the guide tube 3, the tube sheet 23 is removed, and the guide tube 3 can be taken out from the positioning plate 292, which is convenient for disassembling and installing the guide tube 3, so that the guide tube 3 can be removed to clean the scale on the guide tube 3, or directly replace the guide tube 3 with a new one.

[0042] In addition, the feed head 21 is also fixedly connected to the shell 2 by bolts and nuts. By removing the bolts and nuts, the feed head 21 can be removed, and then the tube sheet 23 can be removed from the positioning plate 292 to facilitate the replacement of the guide tube 3.

[0043] Reference Figure 4 and Figure 5 Since scale is easily formed on the inner wall of the shell 2, precipitation or debris will be precipitated when the cold fluid is heated. The precipitated precipitation adheres and accumulates on the inner wall of the shell 2 and the inner and outer walls of the material guide tube 3. In order to facilitate the descaling of the inner wall of the shell 2 and the inner and outer walls of the material guide tube 3, a descaling mechanism 4 is provided in the shell 2, and the descaling mechanism 4 can automatically descale the inner wall of the shell 2.

[0044] The descaling mechanism 4 includes two ultrasonic generators 41 arranged in the shell 2. The ultrasonic generator 41 is fixedly connected to the positioning plate 292. The ultrasonic generator is located in the shell 2. The vibration generated by the ultrasonic wave causes the fluid in the shell 2 to produce cavitation, acceleration and straight flow effects to directly and indirectly affect the scale, that is, the ultrasonic wave generates a large number of tiny bubbles in the liquid. These bubbles grow rapidly and suddenly burst under the action of the ultrasonic wave, generating strong shock waves and high-speed microjets, thereby peeling off and dispersing the scale; in addition, when the ultrasonic wave propagates in the liquid, an acceleration force is generated. This force can cause the liquid molecules to move violently, thereby enhancing the cleaning effect on the inner wall of the shell 2 and the outer wall of the guide tube 3. The straight flow effect generated by the ultrasonic wave in the liquid can cause the cold flow to form a circulating flow in the shell 2, so that the scale is dispersed, emulsified and peeled off to achieve the cleaning purpose, further enhancing the cleaning effect of the scale.

[0045] Two ultrasonic generators with the same frequency are provided in the figure. When the two waves emitted by the two ultrasonic generators 41 meet, their amplitudes are added in some areas and subtracted in other areas, thereby forming a wave reinforcement area and a wave weakening area. Since the reinforcement area and the weakening area are not continuous areas, the cold flow in the shell 2 forms turbulence in the shell 2, causing the cold flow to have a greater impact on the inner wall of the shell 2 and the outer wall of the guide tube 3, flushing down the scale on the inner wall of the shell 2 and the outer wall of the guide tube 3, so that the descaling effect is better.

[0046] In order to increase the effect of the ultrasonic cleaner, a plurality of resonance plates 42 are provided on each deflection baffle 29. The resonance plates 42 are fixedly connected to the horizontal portion of the deflection baffle 29. The resonance plates 42 are elastic steel plates. When the ultrasonic frequency emitted by the ultrasonic generator 41 is close to the natural frequency of the resonance plates 42, the resonance of the resonance plates 42 can be caused, causing the resonance of the resonance plates 42 to vibrate strongly. The vibration of the resonance plates 42 can stir the cold flow, causing the cold flow to churn in the shell 2 and slap the inner wall of the shell 2 and the outer wall of the guide tube 3, thereby flushing down the scale on the inner wall of the shell 2 and the outer wall of the guide tube 3, thereby achieving a better descaling effect. A plurality of wing plates 421 are arranged on each resonance plate 42, and the wing plates 421 will vibrate along with the resonance plate 42, thereby vibrating and stirring the cold flow, further increasing the impact of the cold flow and the inner wall of the shell 2, and when cleaning the inner wall of the shell 2, the impact force of the cold flow will wash down the scale on the inner wall of the shell 2, thereby achieving the effect of cleaning the scale on the inner wall of the shell 2; during the heat exchange process, the vibration of the resonance plate 42 and the wing plates 421 stirs the cold flow, which can increase the contact area between the cold flow and the guide tube 3, making the heat exchange effect more thorough. Usually, during cleaning, the frequency of the ultrasonic generator 41 will be greater than the frequency during heat exchange, so that the ultrasonic generator 41 and the resonance plate 42 can play a role in the cleaning and heat exchange processes.

[0047] Reference Figure 6 and Figure 7 In order to remove scale from the inner wall of the guide pipe 3, a step groove 231 is provided at the position of the tube plate 23 corresponding to the guide pipe 3. Two arc-shaped elastic plates 43 are clamped in the step groove 231. Two vibration plates 431 are fixedly connected to the ends of the elastic plates 43. The vibration plates 431 are elastic steel plates. The vibration plates 431 and the elastic plates 43 are integrally formed. When the ultrasonic wave emitted by the ultrasonic generator 41 causes the elastic plate 43 and the vibration plate 431 to resonate, the vibration plate 431 vibrates strongly. The vibration of the vibration plate 431 can stir the heat source entering the guide pipe 3, so that the kinetic energy of the heat flow entering the guide pipe 3 is converted into the fluctuation of speed and pressure, forming turbulence, so that the fluid entering the guide pipe 3 beats the inner wall of the guide pipe 3, so that the fluid and the inner wall of the guide pipe 3 are impacted, and then the scale on the inner wall of the guide pipe 3 is washed down, so as to achieve the effect of removing scale from the inner wall of the guide pipe 3.

[0048] A transmission rod 44 is arranged in the material guide pipe 3. The transmission rod 44 is an elastic steel plate. The end of the transmission rod 44 is fixedly connected to a limit rod 441. The size of the limit rod 441 is between the inner diameter of the through hole 291 and the inner diameter of the step groove 231. The limit rod 441 is used to prevent the entire transmission rod 44 from entering the material guide pipe 3. The impact of the heat flow causes the transmission rod 44 to vibrate. The transmission rod 44 stirs the heat flow in the material guide pipe 3, so that the heat flow impacts the inner wall of the material guide pipe 3. During heat exchange, the contact area between the heat flow and the inner wall of the material guide pipe 3 is increased, and the heat exchange efficiency is improved. When cleaning scale, the scale on the inner wall of the material guide pipe 3 can be flushed down. During cleaning, the heat flow used can be replaced with water or other fluids.

[0049] In addition, a plurality of fixing rings 45 are provided on the outer cover of the part of the material guide pipe 3, and the fixing rings 45 are rotatably connected to the outside of the material guide pipe 3, and each two fixing rings 45 form a group, and each group of fixing rings 45 is located between two backflow baffles, and two stirring rods 451 are provided between the two fixing rings 45, and the stirring rods 451 are used to connect and fix the fixing rings 45, and a plurality of spiral stirring shafts 452 are provided outside the stirring rods 451, and the stirring shafts 452 are sleeved outside the material guide pipe 3, and a reinforcing rod 453 is fixedly connected to the stirring shaft 452, and the reinforcing rod 453 is away from the stirring rod 451. One end of the mixing shaft 452 is fixed to the stirring rod 451, and the reinforcing rod 453 is used to connect and fix the stirring shaft 452 and the stirring rod 451; when the cold flow enters the shell 2, the impact of the cold flow on the stirring rod 451 and the stirring shaft 452 causes the stirring shaft 452 to rotate outside the guide pipe 3, and the stirring shaft 452 automatically stirs the cold flow, causing the cold flow to churn in the shell 2. When cleaning scale, the scale on the inner wall of the shell 2 and the outer wall of the guide pipe 3 is washed down. During heat exchange, the contact area between the cold flow and the outer wall of the guide pipe 3 is increased, and the heat exchange effect is better.

[0050] Replay Figure 2Due to the turning of the stirring shaft 452 and the vibration of the ultrasonic generator 41 and the resonance plate 42, the impact of the fluid on the inner wall of the shell 2 can be increased, thereby generating noise. In order to reduce the noise from propagating outward, the outer wall of the shell 2 is provided with a sound insulation layer 46. The sound insulation layer 46 is wrapped around the outer wall of the shell 2, which can reduce the noise generated by the impact of the fluid and the inner wall of the shell 2 from propagating outward. The bottom of the shell 2 is provided with a plurality of sewage outlets 20, and the sewage outlets 20 are plugged with plugs 201. The plugs 201 are fixed to the shell by bolts. Opening the plugs 201 facilitates the discharge of scale deposited at the bottom of the shell 2.

[0051] The implementation principle of the high-temperature tubular heat exchanger capable of automatic cleaning in the embodiment of the present application is as follows: during heat exchange, the hot flow is introduced into the feed chamber 24 through the feed pipe 211, the hot flow in the feed chamber 24 enters each guide pipe 3 respectively, and the cold flow enters the cooling chamber 26 through the water inlet pipe 27, and the cold flow in the cooling chamber 26 and the hot flow in the guide pipe 3 perform heat exchange to achieve the final heating or cooling; the ultrasonic wave generated by the ultrasonic generator 41 can increase the oscillation of the hot flow and the cold flow, thereby increasing the exchange efficiency of the hot flow and the cold flow; the resonance plate 42 and the wing plate 421 caused by the ultrasonic generator 41 vibrate, thereby vibrating and stirring the cold flow, further increasing the contact area between the cold flow and the outer wall of the guide pipe 3, and making the heat exchange effect more thorough.

[0052] When cleaning the scale on the inner wall of the shell 2 and the inner wall and outer wall of the guide tube 3, first, increase the frequency of the ultrasonic generator 41. When the two waves emitted by the two ultrasonic generators 41 meet, a wave reinforcement area and a wave weakening area are formed. Since the reinforcement area and the weakening area are not continuous areas, the cold flow in the shell 2 forms turbulence in the shell 2, so that the cold flow has a greater impact on the inner wall of the shell 2 and the outer wall of the guide tube 3, and the scale on the inner wall of the shell 2 and the outer wall of the guide tube 3 is washed down; at the same time, the ultrasonic waves emitted by the ultrasonic generator 41 and the resonance plate 42, the vibration plate 431, etc. form resonance, so that the resonance plate 42 produces strong vibration. The vibration of the resonance plate 42 can stir the cold flow, so that the cold flow churns in the shell 2 and beats the inner wall of the shell 2 and the outer wall of the guide pipe 3, thereby flushing down the scale on the inner wall of the shell 2 and the outer wall of the guide pipe 3, so as to achieve a better descaling effect; the vibration plate 431 produces strong vibration, so that the fluid entering the guide pipe 3 forms turbulence, increases the impact of the fluid and the inner wall of the guide pipe 3, flushes down the scale on the inner wall of the guide pipe 3, and achieves the effect of removing scale.

[0053] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A high-temperature tubular heat exchanger capable of automatic cleaning, characterized in that: The invention comprises a frame (1), a shell (2) is arranged on the frame (1), a feed seal (21) and a discharge seal (22) are arranged at both ends of the shell (2), a feed pipe (211) is connected to the feed seal (21), and a discharge pipe (221) is connected to the discharge seal (22), a tube sheet (23) is arranged at the connection between the shell (2) and the feed seal (21), a tube sheet (23) with the same structure is arranged at the connection between the shell (2) and the discharge seal (22), and a feed seal (21) and a discharge seal (22) are formed between the feed seal (21) and the tube sheet (23). A discharge cavity (24) is formed between the discharge head (22) and the tube sheet (23); a cooling cavity (26) for cold flow to pass through is formed between the two tube sheets (23) and the shell (2); a plurality of material guide pipes (3) are arranged between the two tube sheets (23); two ends of the material guide pipes (3) are respectively connected to the feed cavity (24) and the discharge cavity (25); a water inlet pipe (27) is fixedly connected to one side of the shell (2) close to the discharge head (22); and a water outlet pipe (28) is arranged on one side of the shell (2) close to the feed head (21); The guide tube (3) is provided with a fixing ring (45) on its outer sleeve, the fixing ring (45) is rotatably connected to the outside of the guide tube (3), two stirring rods (451) are provided between the fixing rings (45), the stirring rods (451) are used to connect and fix the fixing rings (45), a plurality of spiral stirring shafts (452) are provided outside the stirring rods (451), the stirring shafts (452) are sleeved outside the guide tube (3), a reinforcing rod (453) is fixedly connected to the stirring shafts (452), one end of the reinforcing rod (453) away from the stirring shaft (452) is fixed to the stirring rod (451), and the reinforcing rod (453) is used to connect and fix the stirring shaft (452) and the stirring rod (451); A descaling mechanism (4) is provided in the housing (2); The descaling mechanism (4) comprises an ultrasonic generator (41) arranged in a housing (2), a plurality of resonance plates (42) are arranged in the housing (2), a plurality of wing plates (421) are arranged on the resonance plates (42), and the resonance plates (42) are elastic steel plates; The shell (2) is provided with a plurality of baffle plates (29) which are arranged perpendicular to the axial direction of the material guide tube (3); one side of the baffle plate (29) is fixedly connected to the inner wall of the shell (2), and the other end is arranged as a free end; the center of the free end of the baffle plate (29) is located on the axis line of the shell (2); adjacent baffle plates (29) are respectively arranged on the inner wall of the shell (2) symmetrically, so that a serpentine flow channel is formed between the baffle plates (29).

2. The high-temperature tubular heat exchanger capable of automatic cleaning according to claim 1, characterized in that: The number of the ultrasonic generators (41) is two.

3. The high-temperature tubular heat exchanger capable of automatic cleaning according to claim 1, characterized in that: The tube plate (23) is provided with a step groove (231) at a position corresponding to the material guide tube (3), two arc-shaped elastic plates (43) are clamped in the step groove (231), and two vibration plates (431) are fixedly connected to the ends of the elastic plates (43), and the vibration plates (431) are elastic steel plates.

4. The high-temperature tubular heat exchanger capable of automatic cleaning according to claim 3, characterized in that: A transmission rod (44) is arranged in the material guide tube (3). The transmission rod (44) is an elastic steel plate. The end of the transmission rod (44) is fixedly connected to a limit rod (441), and the limit rod (441) is clamped in the step groove (231).

5. The high-temperature tubular heat exchanger capable of automatic cleaning according to claim 1, characterized in that: A positioning plate (292) is fixedly connected to one end of the shell (2) corresponding to the feed chamber (24); a circular hole (293) for the material guide tube (3) to pass through is opened in the positioning plate (292) at the position of the material guide tube (3); a limiting ring (31) is fixedly connected to the end of the material guide tube (3); and the diameter of the limiting ring (31) is larger than the diameter of the circular hole (293).

6. The high-temperature tubular heat exchanger capable of automatic cleaning according to claim 1, characterized in that: The outer side wall of the housing (2) is provided with a sound insulation layer (46).

7. The high-temperature tubular heat exchanger capable of automatic cleaning according to claim 1, characterized in that: The bottom of the housing (2) is provided with a plurality of sewage outlets (20), plugs (201) are inserted into the sewage outlets (20), and the plugs (201) are fixed to the housing (2) by bolts.

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