A titanium tube heat exchanger

Abstract

The present invention relates to the technical field of heat exchange equipment, and specifically discloses a titanium tube heat exchanger, wherein a boost mechanism is arranged in an intermediate air cavity and includes an impact plate, a boost member, a pressure member and a power device, wherein the impact plate is rotatably attached to the tube plate, and the impact plate is provided with air leakage holes corresponding to the intake heat exchange tubes one by one; the boost member includes a support portion and a sealing portion formed on the support portion and corresponding to the intake heat exchange tubes one by one, and the free end of the sealing portion slides through the impact plate and extends into the intake heat exchange tube; the pressure member includes a rotating member rotatably arranged in the intermediate air cavity and an elastic member connecting the rotating member and the support portion; the power device is mounted on the shell and connected to the support portion through a snap-fit ​​mechanism. The titanium tube heat exchanger of the present invention utilizes the sealing effect of the sealing portion in the intake heat exchange tube to achieve boosted heat exchange of flue gas and improve the heat exchange efficiency of flue gas.

Description

Technical Field

[0001] The invention relates to the technical field of heat exchange equipment, and in particular to a titanium tube heat exchanger. Background Art

[0002] Tubular heat exchanger, also known as shell and tube or shell and tube heat exchanger, is the most typical partition wall heat exchanger, which is widely used in various industrial fields. It is mainly composed of shell, tube bundle, tube sheet and head. The shell is mostly circular, with parallel tube bundles inside. Both ends of the tube bundle are fixed on the tube sheet, and the wall of the tube bundle is the heat transfer surface. The working principle of tubular heat exchanger is based on the principle of partition wall heat exchange, that is, two fluids flow inside and outside the tube respectively, and heat exchange is achieved through heat transfer of the tube wall. Each time the fluid passes through the tube bundle in the heat exchanger is called a tube pass, and each time it passes through the shell is called a shell pass. By increasing the number of tube passes or shell passes, the heat exchange efficiency can be improved.

[0003] The Chinese patent document with the authorization announcement number CN116929111B discloses a tube bundle regulating heat exchanger for a drying tower, including a shell and a heat exchange tube. The heat exchange tube is axially arranged in the shell. A plurality of baffles are also arranged in the shell. The upper surface of the shell near the front end is connected to a liquid inlet pipe, and the lower surface near the rear end is connected to a liquid outlet pipe. The smoke inlet shell is connected to the input end of the shell at the heat exchange tube, and the surface of the smoke inlet shell is connected to the smoke inlet pipe. The smoke outlet shell is connected to the output end of the shell at the heat exchange tube, and the surface of the smoke outlet shell is connected to the smoke outlet pipe. When in use, smoke can be introduced into the heat exchange tube through the smoke inlet pipe, and heat exchange medium can be introduced into the shell through the liquid inlet pipe. Both use the tube wall of the heat exchange tube to achieve the effect of heat exchange.

[0004] However, when the boiler is working, the flue gas generated may be unstable. When the pressure and flow rate of the incoming flue gas are small, the flow density of the flue gas in the heat exchange tube is small and the convective heat transfer coefficient is low, which leads to poor heat exchange efficiency. Summary of the invention

[0005] The present invention provides a titanium tube heat exchanger, aiming to solve the problem of poor heat exchange efficiency when the flue gas pressure and flow rate are small in the related art.

[0006] The titanium tube heat exchanger of the present invention comprises a shell, a heat exchange mechanism and a boost mechanism, the heat exchange mechanism comprises tube sheets installed in the shell and arranged on both sides of the shell, a heat exchange tube bundle coaxially arranged in the shell and connected to the two tube sheets at both ends, the heat exchange tube bundle comprises an air intake heat exchange tube and an air outlet heat exchange tube, the spaces between the two tube sheets away from each other respectively form an external air cavity and an intermediate air cavity, the boost mechanism is arranged in the intermediate air cavity, the boost mechanism comprises an impact plate, a boost piece, a pressure piece and a power device, the impact plate can be rotatably attached to the tube sheet, and the impact plate is provided with a heat exchange tube bundle connected to the air intake heat exchange tube and the outlet heat exchange tube bundle. The heat pipes have corresponding air leakage holes; the supercharger includes a support portion and a sealing portion formed on the support portion and corresponding to the intake heat exchange pipe, and the free end of the sealing portion slides through the impact plate and extends into the intake heat exchange pipe; the pressure member includes a rotating member rotatably arranged in the intermediate air cavity and an elastic member connecting the rotating member and the support portion; the power device is mounted on the shell and connected to the support portion through a snap mechanism, and the snap mechanism is used to transmit the power of the power device to the support portion to rotate it when the support portion moves away from the intake heat exchange pipe.

[0007] The effect is that by setting the blocking part, low-pressure and low-flow flue gas can be blocked and accumulated, thereby increasing the pressure and density of the flue gas in the intake heat exchange tube, and increasing the convective heat transfer coefficient between the flue gas and the wall of the intake heat exchange tube, which helps to increase the heat transferred per unit time under the same heat exchange area, thereby improving the heat exchange efficiency of the flue gas. By rotating the impact plate, the air leakage hole and the intake heat exchange tube are aligned, and then the flue gas pressure is released. During the pressure release, the flue gas can flush out the impurities on the inner wall of the intake heat exchange tube, realize the internal cleaning of the intake heat exchange tube, and reduce the burden of manual cleaning.

[0008] Preferably, the engaging mechanism comprises a spline wheel mounted on the output end of the power device and a spline groove formed on the support portion, and when the support portion moves away from the intake heat exchange tube, the spline groove can engage with the spline wheel.

[0009] Preferably, the rotating member is located on the side of the support portion away from the intake heat exchange tube, and the boost mechanism also includes a sliding ring plate and a linear drive member, the sliding ring plate is installed in the middle air cavity along the axial direction of the intake heat exchange tube, and the rotating member is located in the sliding ring plate and is rotatably embedded in the sliding ring plate; the linear drive member is installed on the shell and is used to control the sliding of the sliding ring plate.

[0010] The effect is that the linear drive controls the sliding of the sliding ring plate to indirectly control the sliding of the plugging part, thereby controlling the insertion depth of the plugging part in the intake heat exchange tube, thereby adjusting the ultimate pressure of the flue gas in the intake heat exchange tube and improving the flexibility of the heat exchanger. The linear drive can also control the plugging part to completely disengage from the intake heat exchange tube and the impact plate to avoid affecting the flow of the flue gas, thus enabling the heat exchanger to have multiple working modes and improving the adaptability of the heat exchanger.

[0011] Preferably, the external air cavity includes an air inlet cavity for the entry of smoke and an air outlet cavity for the exhaust of smoke, which are separated from each other, the air inlet heat exchange tube is connected to the air inlet cavity, and the air outlet heat exchange tube is connected to the air outlet cavity. The titanium tube heat exchanger also includes a boosting mechanism arranged in the air outlet cavity, and the boosting mechanism includes a boosting member and an elastic member. The boosting member includes a connecting portion slidingly arranged in the air outlet cavity along the axial direction of the heat exchange tube bundle and a closing portion formed on the connecting portion. The closing portion corresponds one-to-one with the air outlet heat exchange tube and is slidably inserted in the corresponding air outlet heat exchange tube; the elastic member connects the connecting portion and the shell.

[0012] The effect is that the closed part is used to provide resistance to the flow of flue gas, thereby achieving the purpose of flue gas pressurization and heat exchange and improving the heat exchange efficiency.

[0013] Preferably, the boost mechanism also includes a linear drive component, which is mounted on the shell and connected to the connecting part through a telescopic rod. When the telescopic rod is in its longest state, the power on the linear drive component can be transmitted to the connecting part to make it slide away from the outlet heat exchange tube.

[0014] The effect is that the linear drive member enables the closed part to slide in the outlet heat exchange pipe through the telescopic rod and the elastic member, thereby adjusting the limit value of the flue gas pressure in the outlet heat exchange pipe and improving the flexibility of the heat exchanger. The linear drive member can also slide the closed part out of the outlet heat exchange pipe through the telescopic rod to avoid affecting the flow of flue gas, thereby increasing the working mode of the heat exchanger.

[0015] Preferably, the titanium tube heat exchanger also includes a first cleaning mechanism, which includes a sleeve, a threaded part and a cleaning part. The sleeve is rotatably installed on the connecting portion and extends along the axial direction of the heat exchange tube bundle. One end of the threaded part is slidably inserted into the sleeve, and the other end extends between the two tube sheets and is rotatably connected to the tube sheets. The cleaning part of the first cleaning mechanism is threadedly connected to the threaded part and is slidably penetrated by the outlet heat exchange tube, so that when the threaded part rotates, the cleaning part of the first cleaning mechanism can slide along the axial direction of the outlet heat exchange tube to scrape off impurities on the outer wall of the outlet heat exchange tube; a driving component that can drive the sleeve to rotate is provided on the shell.

[0016] Preferably, the titanium tube heat exchanger also includes a second cleaning mechanism, which is arranged between the intake heat exchange tube and the intake cavity and has the same structure as the first cleaning mechanism. The cleaning part of the second cleaning mechanism is used to scrape impurities on the outer wall of the intake heat exchange tube.

[0017] The effect is that the first cleaning mechanism and the second cleaning mechanism realize automatic cleaning of the outer wall of the heat exchange tube bundle, reducing the burden of manual cleaning.

[0018] Preferably, the driving assembly includes a transmission gear, a driving gear and a driving motor, there are two transmission gears, which are respectively mounted on the sleeves of the first cleaning mechanism and the second cleaning mechanism; the driving motor is installed on the shell, the driving gear is located in the shell and connected to the output shaft of the driving motor, in the initial state, the driving gear and the transmission gear are spaced apart, and when the sleeve slides away from the intake heat exchange tube and the outlet heat exchange tube, the transmission gear can engage with the driving gear.

[0019] Preferably, baffles arranged in a zigzag shape along the axial direction of the heat exchange tube bundle are provided in the shell.

[0020] By adopting the above technical solution, the beneficial effects of the present invention are as follows:

[0021] The present invention blocks the air intake heat exchange tube by the blocking part, so that low-pressure and low-flow smoke can be accumulated due to obstruction, thereby increasing the pressure and density of the smoke, and increasing the convective heat transfer coefficient between the smoke and the wall of the air intake heat exchange tube, which helps to increase the heat transferred per unit time under the same heat exchange area, thereby improving the heat exchange efficiency of the smoke. The rotation of the impact plate realizes the alignment of the air leakage hole and the air intake heat exchange tube, and then realizes the leakage of the smoke. When the air is leaked, the impact force of the smoke can bring out the impurities on the inner wall of the air intake heat exchange tube, and realize the internal cleaning of the air intake heat exchange tube, saving time and labor. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the appearance of the titanium tube heat exchanger of the present invention.

[0023] Figure 2 It is a cross-sectional schematic diagram of the titanium tube heat exchanger of the present invention.

[0024] Figure 3 The present invention Figure 2 A magnified schematic diagram of center A.

[0025] Figure 4 The present invention Figure 2 A magnified schematic diagram of point B in the middle.

[0026] Figure 5It is a three-dimensional schematic diagram of the power device to the impact plate portion of the present invention.

[0027] Figure 6 It is a schematic structural diagram of the cleaning element to baffle portion of the present invention.

[0028] Figure 7 It is a schematic diagram of the state when the air leakage hole and the heat exchange tube of the present invention are aligned.

[0029] Reference numerals:

[0030] 1. Shell; 11. Middle air cavity; 12. Partition plate; 121. Sliding port; 13. Air inlet cavity; 14. Air outlet cavity; 15. Heat exchange cavity; 16. Liquid inlet; 17. Liquid outlet;

[0031] 21. tube sheet; 22. heat exchange tube bundle; 222. air inlet heat exchange tube; 223. air outlet heat exchange tube; 23. baffle;

[0032] 31. impact plate; 311. vent hole; 32. booster; 321. support part; 321a. spline groove; 322. blocking part; 33. pressure part; 331. rotating part; 332. elastic part; 34. power device; 341. spline wheel; 35. sliding ring plate; 351. telescopic sleeve rod; 36. linear drive part;

[0033] 41, booster; 411, connecting portion; 411a, shielding portion; 412, closing portion; 42, elastic member; 43, linear driving member; 431, telescopic rod;

[0034] 51. sleeve; 52. threaded member; 53. cleaning member; 531. buffer spring;

[0035] 61. Transmission gear; 62. Driving gear; 63. Driving motor. DETAILED DESCRIPTION

[0036] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0037] Combine the following Figures 1 to 7 The titanium tube heat exchanger of the present invention is described.

[0038] like Figures 1 to 4 As shown, the titanium tube heat exchanger of the present invention includes a shell 1, a heat exchange mechanism, a pressure-increasing mechanism, a boosting mechanism, a first cleaning mechanism and a second cleaning mechanism.

[0039] The heat exchange mechanism includes a tube sheet 21 and a heat exchange tube bundle 22. There are two tube sheets 21 and both are installed in the shell 1. The two tube sheets 21 are arranged on both sides of the shell 1 in the axial direction. The spaces between the two tube sheets 21 that are separated from each other form an external air cavity and an intermediate air cavity 11 respectively. A partition plate 12 is fixed in the external air cavity to separate it into an air inlet cavity 13 for entering smoke and an air outlet cavity 14 for exhausting smoke.

[0040] Continue to refer Figures 2 to 4 The heat exchange tube bundle 22 is coaxially arranged in the shell 1 and its two ends are fixedly connected to the two tube sheets 21 respectively. The heat exchange tube bundle 22 includes an air inlet heat exchange tube 222 and an air outlet heat exchange tube 223. The two ends of the air inlet heat exchange tube 222 are respectively connected to the air inlet cavity 13 and the intermediate cavity 11, and the two ends of the air outlet heat exchange tube 223 are respectively connected to the air outlet cavity 14 and the intermediate cavity 11. The high-temperature flue gas flows to the intermediate cavity 11 through the air inlet cavity 13 and the air inlet heat exchange tube 222, thus completing the flow of the first tube pass, and then flows out of the titanium tube heat exchanger through the air outlet heat exchange tube 223 and the air outlet cavity 14, thus completing the flow of the second tube pass. The double-tube flow form can improve the heat exchange efficiency of the flue gas. A heat exchange cavity 15 is formed between the two tube sheets 21. The shell 1 is provided with a liquid inlet 16 and a liquid outlet 17 which are spaced apart along the axial direction of the heat exchange tube bundle 22 and are both connected to the heat exchange cavity 15. The liquid inlet 16 is located below the liquid outlet 17. The heat exchange medium enters through the liquid inlet 16 and is discharged from the liquid outlet 17 after filling the heat exchange cavity 15. During the flow, the heat exchange medium exchanges heat with the flue gas through the tube wall of the heat exchange tube bundle 22, thereby cooling the flue gas. The flow mode of the heat exchange medium entering from the bottom and exiting from the top allows the heat exchange cavity 15 to be filled with the heat exchange medium, thus making the heat exchange more sufficient. The heat exchange medium in this embodiment can directly use cooling water.

[0041] Continue to refer Figure 2 and Figure 6 A plurality of baffles 23 are arranged in a zigzag shape along the axial direction of the heat exchange tube bundle 22 in the shell 1. It can be understood that the heat exchange tube bundle 22 passes through the baffles 23. The baffles 23 are used to reduce the flow velocity of the heat exchange medium in the shell side and promote the heat exchange medium to cross-flow through the heat exchange tube bundle 22 multiple times, while forming turbulence to improve the heat exchange effect.

[0042] Continue to refer Figure 2 , Figure 3 , Figure 5 and Figure 7The supercharging mechanism is arranged in the middle air cavity 11, and includes an impact plate 31, a supercharging member 32, a pressure member 33 and a power device 34. The impact plate 31 is attached to the tube plate 21 and rotatably mounted on the inner wall of the housing 1. The impact plate 31 is provided with air leakage holes 311 corresponding to the intake heat exchange tube 222. Under normal conditions, the air leakage holes 311 and the intake heat exchange tube 222 are misaligned. The supercharging member 32 includes a supporting portion 321 and a blocking portion 322. The blocking portion 322 is formed on the supporting portion 321 and corresponds to the intake heat exchange tube 222. The free end of the blocking portion 322 slides through the impact plate 31 and extends into the intake heat exchange tube 222, thereby blocking the intake heat exchange tube 222. The pressure member 33 includes a rotating member 331 and an elastic member 332. The rotating member 331 is located on the side of the blocking portion 322 away from the intake heat exchange tube 222. There is a gap between the rotating member 322 and the support portion 321, and the rotating member 322 can rotate. The elastic member 332 is located between the rotating member 331 and the support portion 321 and connects the rotating member 331 and the support portion 321. In this embodiment, the elastic member 332 can be a spring rod, etc. The power device 34 is installed on the housing 1 and connected to the support portion 321 through a clamping mechanism. The clamping mechanism includes a spline wheel 341 and a spline groove 321a. The output end of the power device 34 passes through the axis of the rotating member 331 and extends between the rotating member 331 and the support portion 321. The spline wheel 341 is installed at the output end of the power device 34, and the spline groove 321a is opened on the support portion 321. The power device 34 in this embodiment can directly use a power motor.

[0043] When the pressure and flow rate of the flue gas entering the intake heat exchange tube 222 are relatively low, the flue gas will be blocked by the blocking portion 322 and gradually accumulate in the intake heat exchange tube 222, so that the density of the flue gas in the intake heat exchange tube 222 will gradually increase, and the convection heat transfer coefficient between the flue gas and the tube wall of the intake heat exchange tube 222 will increase, which will help to increase the heat transferred per unit time under the same heat exchange area, thereby improving the heat exchange efficiency of the flue gas. When the flue gas accumulates, the pressure will gradually increase and push the blocking portion 322 to slide to the outside of the intake heat exchange tube 222, the support portion 321 moves away from the intake heat exchange tube 222, and the spline groove 321a gradually approaches the spline wheel 341 until it engages with the spline wheel 341, and at this time the blocking portion 322 is separated from the intake heat exchange tube 222 and enters the impact plate 31. Then, the power device 34 drives the support part 321 to rotate through the spline wheel 341 and the spline groove 321a, and the blocking part 322 drives the impact plate 31 to rotate. When the air leakage hole 311 of the impact plate 31 is aligned with the intake heat exchange tube 222, the flue gas accumulated in the intake heat exchange tube 222 will be impacted out under the action of pressure to achieve pressure relief. As the flue gas flows and exchanges heat in the intake heat exchange tube 222, some impurities will adhere to the inner wall of the intake heat exchange tube 222. When the flue gas rushes out from the air leakage hole 311, these impurities can be flushed down and taken out of the intake heat exchange tube 222, thereby achieving internal cleaning of the intake heat exchange tube 222. Using the air leakage hole 311 to achieve pressure relief can extend the pressure relief time of the flue gas and ensure sufficient pressure relief of the flue gas. The elastic member 332 is used to provide an elastic blocking force for the blocking part 322, thereby ensuring the pressurization effect of the flue gas in the intake heat exchange tube 222. After the flue gas is depressurized, the power device 34 can control the impact plate 31 to continue rotating until the next blocking portion 322 is aligned with the intake heat exchange tube 222. At this time, the blocking portion 322 is inserted into the intake heat exchange tube 222 under the action of the elastic member 332, thereby re-blocking the intake heat exchange tube 222. The above process is then repeated, and the blocking portion 322 can achieve the process of continuously pressurizing and depressurizing the flue gas, thereby improving the heat exchange efficiency of the low-pressure and low-flow flue gas.

[0044] When the pressure and flow rate of the flue gas entering the intake heat exchange tube 222 are relatively large, the blocking portion 322 can be easily pressed to the impact plate 31 by the flue gas. At this time, the power device 34 can control the alignment of the air leakage hole 311 and the intake heat exchange tube 222 by the rotation of the impact plate 31, so as to achieve the pressure relief and internal cleaning of the intake heat exchange tube 222. Thereafter, the air leakage hole 311 can maintain the state of being connected with the intake heat exchange tube 222, or when the impurities on the inner wall of the intake heat exchange tube 222 accumulate to a certain extent, the impact plate 31 can rotate again to make the air leakage hole 311 and the intake heat exchange tube 222 misaligned, so as to help the flue gas accumulate for a period of time, and then the impact plate 31 makes the next air leakage hole 311 and the intake heat exchange tube 222 align to achieve the pressure relief of the flue gas, thereby taking out the impurities on the inner wall of the intake heat exchange tube 222. It should be noted that in the present embodiment, the opening and closing and operation of the power device 34 are all controlled by electronic control equipment and sensors. For example, a position sensor (not shown in the figure) can be installed on the spline wheel 341 or the support portion 321, and a controller can be installed on the housing 1. The controller is electrically connected to the position sensor and the power device 34, respectively. After the position sensor detects that the spline groove 321a and the spline wheel 341 are engaged, the controller controls the operation of the power device 34. These are conventional technologies in the field and will not be elaborated here.

[0045] Continue to refer Figure 3 and Figure 5 The boost mechanism further includes a sliding ring plate 35 and a linear drive member 36. The sliding ring plate 35 is disposed in the middle air cavity 11 and connected to the housing 1 through a telescopic sleeve rod 351. The telescopic sleeve rod 351 is disposed along the axial direction of the heat exchange tube bundle 22. The rotating member 331 is located in the sliding ring plate 35. The outer edge of the rotating member 331 is rotatably embedded in the sliding ring plate 35. The linear drive member 36 is mounted on the housing 1 and is used to control the sliding of the sliding ring plate 35. In this embodiment, the linear drive member 36 can be a hydraulic rod, an electric push rod, a cylinder, etc.

[0046] When the linear drive 36 controls the sliding ring plate 35 to slide, the sliding ring plate 35 can drive the support part 321 and the blocking part 322 to slide through the rotating part 331, thereby controlling the insertion depth of the blocking part 322 in the intake heat exchange tube 222, and then controlling the pressure on the blocking part 322 when it moves to the impact plate 31, thereby adjusting the ultimate pressure of the flue gas in the intake heat exchange tube 222, that is, the pressure when the flue gas begins to release pressure, thereby improving the flexibility of the heat exchanger. In addition, the linear drive 36 can also control the blocking part 322 to completely disengage from the intake heat exchange tube 222 and the impact plate 31, so that the blocking part 322 no longer provides resistance to the flow of the flue gas, and the flue gas can flow normally. This form is suitable for the flow of flue gas under high pressure and high speed, and improves the adaptability of the heat exchanger.

[0047] Continue to refer Figure 2 , Figure 4 and Figure 7The titanium tube heat exchanger also includes a boosting mechanism disposed in the air outlet cavity 14, and the boosting mechanism includes a boosting member 41 and an elastic member 42. The boosting member 41 includes a connecting portion 411 and a closing portion 412. The connecting portion 411 is slidably disposed in the air outlet cavity 14 along the axial direction of the heat exchange tube bundle 22. The closing portion 412 is formed on the connecting portion 411 and corresponds to the air outlet heat exchange tube 223 one by one. The closing portion 412 is slidably inserted in the corresponding air outlet heat exchange tube 223. The elastic member 42 connects the connecting portion 411 and the housing 1. In this embodiment, the elastic member 42 may be a compression spring. The flue gas leaking from the air leakage hole 311 can flow into the outlet heat exchange pipe 223 through the middle air cavity 11, and is blocked by the sealing part 412 and accumulates pressure, thereby achieving the purpose of pressurized heat exchange again and improving the heat exchange efficiency. At the same time, the sealing part 412 will be gradually moved out of the outlet heat exchange pipe 223 due to the pressure of the flue gas. When the sealing part 412 is completely moved out of the outlet heat exchange pipe 223, the flue gas rushes into the air outlet cavity 14 and is discharged externally. When the flue gas rushes out, it can bring out impurities on the inner wall of the outlet heat exchange pipe 223, thereby achieving internal cleaning of the outlet heat exchange pipe 223.

[0048] Continue to refer Figure 4 The boost mechanism further includes a linear drive member 43, which is mounted on the housing 1 and connected to the connecting portion 411 via a telescopic rod 431, which extends along the axial direction of the heat exchange tube bundle 22. Under normal conditions, the telescopic rod 431 is generally in its longest state under the action of the elastic member 42. In this embodiment, the linear drive member 43 may be a hydraulic rod, an electric push rod, a cylinder, etc.

[0049] When the closing part 412 slides away from the outlet heat exchange pipe 223 due to the pressure of the flue gas, the closing part 412 can push the telescopic rod 431 to contract through the connecting part 411, and the telescopic rod 431 is used to avoid the sliding of the closing part 412 and the connecting part 411 at this time. When the linear drive 43 controls the telescopic rod 431 to slide in the direction away from the outlet heat exchange pipe 223, the telescopic rod 431 in the longest state can transmit power to the connecting part 411, so that the connecting part 411 slides away from the outlet heat exchange pipe 223, and then the closing part 412 slides away from the outlet heat exchange pipe 223, thereby reducing the opening pressure of the closing part 412, so that the limit value of the flue gas pressure in the outlet heat exchange pipe 223 is lowered. On the contrary, when the linear drive 43 controls the telescopic rod 431 to slide in the direction close to the outlet heat exchange pipe 223, under the action of the compression spring, the telescopic rod 431 is always in the longest state, and the blocking part 322 is gradually inserted into the depth of the outlet heat exchange pipe 223, thereby increasing the opening pressure of the sealing part 412, so that the limit value of the flue gas pressure in the outlet heat exchange pipe 223 is increased, and the flexibility of the heat exchanger is improved. In addition, the linear drive 43 can also control the sealing part 412 to completely escape from the outlet heat exchange pipe 223, so that the flue gas can circulate normally, and increase the working mode of the heat exchanger.

[0050] Continue to refer Figure 2 , Figure 4 and Figure 6 The titanium tube heat exchanger also includes a first cleaning mechanism, which includes a sleeve 51, a threaded member 52 and a cleaning member 53. The sleeve 51 is rotatably mounted on the connecting portion 411 and extends along the axial direction of the heat exchange tube bundle 22. It should be noted that the telescopic rod 431 can be indirectly connected to the connecting portion 411 through the sleeve 51. One end of the threaded member 52 is slidably inserted into the sleeve 51, and the other end extends into the heat exchange chamber 15. The threaded member 52 is rotatably connected to both tube sheets 21. In this embodiment, the threaded member 52 can directly use a lead screw. The cleaning member 53 is threadedly connected to the threaded member 52 and is slidably penetrated by the outlet heat exchange tube 223. In this embodiment, the cleaning member 53 can be a semicircular cleaning plate. When the threaded member 52 rotates, the cleaning member 53 can slide along the axial direction of the outlet heat exchange tube 223 to scrape off impurities on the outer wall of the outlet heat exchange tube 223, thereby achieving external cleaning of the outlet heat exchange tube 223.

[0051] Continue to refer Figure 2 , Figure 4 and Figure 6 The titanium tube heat exchanger also includes a second cleaning mechanism, which is arranged between the air intake heat exchange tube 222 and the air intake chamber 13, and has the same structure as the first cleaning mechanism. The cleaning member 53 of the second cleaning mechanism is used to scrape off impurities on the outer wall of the air intake heat exchange tube 222. It should be noted that a sliding port 121 is provided on the partition 12, and part of the connecting portion 411 passes through the sliding port 121 and extends into the air intake chamber 13, thereby realizing a rotational connection with the sleeve 51 of the second cleaning mechanism, and providing support for the sleeve 51 of the second cleaning mechanism. The part of the connecting portion 411 passing through the sliding port 121 is provided with two shielding portions 411a, which are respectively arranged on both sides of the connecting portion 411 along the axial direction of the heat exchange tube bundle 22, and the shielding portion 411a is used for the connecting portion 411 to maintain the shielding state of the sliding port 121 when sliding, so as to prevent the flue gas in the air intake chamber 13 and the air outlet chamber 14 from flowing to each other and avoiding turbulence.

[0052] Continue to refer Figure 2 , Figure 4 and Figure 6The housing 1 is provided with a driving assembly capable of driving the sleeve 51 to rotate, and the driving assembly includes a transmission gear 61, a driving gear 62 and a driving motor 63. There are two transmission gears 61, which are respectively mounted on the sleeves 51 of the first cleaning mechanism and the second cleaning mechanism. The driving motor 63 is mounted on the housing 1, and the output shaft of the driving motor 63 extends into the housing 1. The driving gear 62 is connected to the output shaft of the driving motor 63. In the initial state, the driving gear 62 and the transmission gear 61 are spaced apart along the axial direction of the heat exchange tube bundle 22. When the heat exchange tube bundle 22 is to be cleaned externally, the linear driving member 43 can control the connecting portion 411 to slide away from the outlet heat exchange tube 223. When the closing portion 412 is disengaged from the outlet heat exchange tube 223, the connecting portion 411 continues to slide, and drives the transmission gear 61 through the sleeve 51 to continue to approach the driving gear 62 until the transmission gear 61 is meshed with the driving gear 62. Then, the driving motor 63 controls the sleeve 51 to rotate through the driving gear 62 and the transmission gear 61 , and the sleeve 51 drives the threaded member 52 to rotate, thereby achieving sliding decontamination of the cleaning member 53 .

[0053] It is worth noting that continuing to refer to Figure 2 and Figure 6 The cleaning member 53 is located between two adjacent baffles 23. The cleaning member 53 is provided with buffer springs 531 on both sides of the axial direction of the heat exchange tube bundle 22. When the cleaning member 53 slides, it is easy to touch the baffle 23. The buffer spring 531 is used to buffer the cleaning member 53, reduce the collision damage of the cleaning member 53, and extend its service life.

[0054] In this embodiment, the support portion 321 and the connecting portion 411 may be in the shape of a plate, a table, a disk, etc. The blocking portion 322 and the closing portion 412 may be in the shape of an axis, a column, a strip, etc. The rotating member 331 may be in the shape of a circular plate, a circular ring, a circular disk, etc., without limitation.

[0055] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" 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 should not be understood as limiting the present invention.

[0056] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0057] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A titanium tube heat exchanger, comprising a shell (1) and a heat exchange mechanism, the heat exchange mechanism comprising tube sheets (21) installed in the shell (1) and arranged on both sides of the shell (1), a heat exchange tube bundle (22) coaxially arranged in the shell (1) and connected to the two tube sheets (21) at both ends, the heat exchange tube bundle (22) comprising an inlet heat exchange tube (222) and an outlet heat exchange tube (223), characterized in that: The spaces between the two tube sheets (21) which are separated from each other respectively form an external air cavity and an intermediate air cavity (11), and also include a supercharging mechanism arranged in the intermediate air cavity (11), the supercharging mechanism including an impact plate (31), a supercharging member (32), a pressure member (33) and a power device (34); the impact plate (31) is rotatably attached to the tube sheet (21), and the impact plate (31) is provided with air leakage holes (311) which correspond one-to-one with the air intake heat exchange tubes (222); the supercharging member (32) includes a support portion (321) and a sealing portion (311) which is formed on the support portion (321) and corresponds one-to-one with the air intake heat exchange tubes (222); 22, the free end of the blocking portion (322) slides through the impact plate (31) and extends into the intake heat exchange tube (222); the pressure member (33) comprises a rotating member (331) rotatably arranged in the middle air cavity (11) and an elastic member (332) connecting the rotating member (331) and the support portion (321); the power device (34) is mounted on the housing (1) and connected to the support portion (321) via a snap-fit ​​mechanism, the snap-fit ​​mechanism being used to transmit the power of the power device (34) to the support portion (321) when the support portion (321) moves away from the intake heat exchange tube (222) to cause it to rotate.

2. The titanium tube heat exchanger according to claim 1, characterized in that: The engaging mechanism comprises a spline wheel (341) mounted on the output end of the power device (34) and a spline groove (321a) provided on the support portion (321); when the support portion (321) moves away from the intake heat exchange tube (222), the spline groove (321a) can engage with the spline wheel (341).

3. The titanium tube heat exchanger according to claim 1, characterized in that: The rotating member (331) is located on a side of the support portion (321) away from the intake heat exchange tube (222). The supercharging mechanism further comprises a sliding ring plate (35) and a linear drive member (36). The sliding ring plate (35) is slidably mounted in the middle air cavity (11) along the axial direction of the heat exchange tube bundle (22). The rotating member (331) is located in the sliding ring plate (35) and is rotatably embedded in the sliding ring plate (35). The linear drive member (36) is mounted on the housing (1) and is used to control the sliding of the sliding ring plate (35).

4. The titanium tube heat exchanger according to claim 1, characterized in that: The external air cavity comprises an air inlet cavity (13) for smoke to enter and an air outlet cavity (14) for smoke to be discharged, which are separated from each other; the air inlet heat exchange pipe (222) is in communication with the air inlet cavity (13); the air outlet heat exchange pipe (223) is in communication with the air outlet cavity (14); the titanium tube heat exchanger further comprises a pressure-boosting mechanism disposed in the air outlet cavity (14); the pressure-boosting mechanism comprises: A booster (41), the booster (41) comprising a connecting portion (411) slidably disposed in the air outlet cavity (14) along the axial direction of the heat exchange tube bundle (22) and a closing portion (412) formed on the connecting portion (411), the closing portion (412) corresponding one-to-one to the air outlet heat exchange tube (223) and slidably inserted in the corresponding air outlet heat exchange tube (223); An elastic member (42), wherein the elastic member (42) connects the connecting portion (411) and the housing (1).

5. The titanium tube heat exchanger according to claim 4, characterized in that: The boost mechanism further comprises a linear drive member (43), wherein the linear drive member (43) is mounted on the housing (1) and connected to the connecting portion (411) via a telescopic rod (431); when the telescopic rod (431) is in its longest state, power on the linear drive member (43) can be transmitted to the connecting portion (411), so as to cause the linear drive member to slide away from the outlet heat exchange pipe (223).

6. The titanium tube heat exchanger according to claim 5, characterized in that: The titanium tube heat exchanger also includes a first cleaning mechanism, which includes a sleeve (51), a threaded member (52) and a cleaning member (53); the sleeve (51) is rotatably mounted on the connecting portion (411) and extends along the axial direction of the heat exchange tube bundle (22); one end of the threaded member (52) is slidably inserted into the sleeve (51), and the other end extends between the two tube sheets (21) and is rotatably connected to the tube sheets (21); the cleaning member (53) of the first cleaning mechanism is threadedly connected to the threaded member (52) and is slidably penetrated by the outlet heat exchange tube (223), so that when the threaded member (52) rotates, the cleaning member (53) of the first cleaning mechanism can slide along the axial direction of the outlet heat exchange tube (223) to scrape off impurities on the outer wall of the outlet heat exchange tube (223); and the shell (1) is provided with a driving component capable of driving the sleeve (51) to rotate.

7. The titanium tube heat exchanger according to claim 6, characterized in that: The titanium tube heat exchanger also includes a second cleaning mechanism, which is arranged between the air intake heat exchange tube (222) and the air intake cavity (13) and has the same structure as the first cleaning mechanism. The cleaning member (53) of the second cleaning mechanism is used to scrape off impurities on the outer wall of the air intake heat exchange tube (222).

8. The titanium tube heat exchanger according to claim 7, characterized in that: The drive assembly comprises: Transmission gears (61), two of which are respectively sleeved on the sleeves (51) of the first cleaning mechanism and the second cleaning mechanism; A driving gear (62) and a driving motor (63), wherein the driving motor (63) is mounted on the housing (1), and the driving gear (62) is located inside the housing (1) and connected to an output shaft of the driving motor (63); in an initial state, the driving gear (62) and the transmission gear (61) are spaced apart, and when the sleeve (51) slides away from the inlet heat exchange tube (222) and the outlet heat exchange tube (223), the transmission gear (61) can mesh with the driving gear (62).

9. The titanium tube heat exchanger according to claim 1, characterized in that: The shell (1) is provided with baffles (23) arranged in a zigzag shape along the axial direction of the heat exchange tube bundle (22).

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