A heat pipe type low-temperature economizer for power plants

Abstract

The present invention relates to the field of heat pipe low-temperature economizers, and in particular to a heat pipe type low-temperature economizer for power plants, comprising a water tank, on which a water inlet pipe and a water outlet pipe are respectively arranged, and rectangular plates are symmetrically arranged on one side of the water tank, a connecting plate is commonly arranged between the rectangular plates, and the rectangular plate on one side is connected to one side of the water tank, and a plurality of heat pipes are commonly slidably penetrated between the rectangular plates, and a heating element for heating water in the water tank is arranged on the heat pipe, and heat in hot air is collected and transferred to the water tank by the heat pipe in the heating element to heat the water in the water tank, and a driving unit drives the heat pipe to rotate through an installation component, so that the heat pipe drives the spiral blades to rotate, so as to increase the flow velocity and turbulence degree of the surrounding fluid to enhance the heat exchange efficiency, and at the same time, the driving unit synchronously drives the cleaning unit to synchronously clean the dust attached to the outer side of the spiral blade to prevent dust accumulation.

Description

Technical Field

[0001] The invention relates to the field of heat pipe low-temperature economizers, and in particular to a heat pipe low-temperature economizer used in power plants. Background Art

[0002] The heat pipe economizer consists of a sealed tube filled with a working fluid; one end of the heat pipe (evaporation section) contacts the high-temperature fluid, and the other end (condensation section) contacts the low-temperature fluid; when one end of the heat pipe is heated, the working fluid absorbs heat and evaporates in the evaporation section, and the steam flows to the condensation section under the action of the pressure difference in the tube; in the condensation section, the steam releases latent heat and condenses into liquid; the condensed liquid returns to the evaporation section, completing a cycle.

[0003] Most power plants use ordinary tubular low-temperature economizers. Under the dual corrosion of acid point and water dew point, the economizer tubes will be corroded through after running for about a year. Dew point corrosion is when the flue gas temperature is lower than the dew point temperature of water vapor, the water vapor in the flue gas will condense, and together with the sulfur dioxide and sulfur trioxide in the flue gas, the tubes will be chemically and electrochemically corroded. This is called dew point corrosion; and the acid dew point refers to when burning high-sulfur fuels, part of the sulfur dioxide formed after combustion will be further oxidized into sulfur trioxide, and combined with the water vapor in the flue gas to form sulfuric acid vapor. The condensation temperature of sulfuric acid vapor in the flue gas, the acid dew point, is much higher than the water dew point, which can reach 110 to 160 degrees, or even higher. The higher the sulfur content in the fuel, the lower the calorific value, the more sulfur dioxide is generated by combustion, and then the sulfur trioxide will also increase, causing the flue gas acid dew point to increase. At high temperatures (350-600 degrees), 2%-5% of sulfur dioxide is converted into sulfur trioxide under aerobic conditions. The low-temperature corrosion of flue gas on the heated surface is often expressed by the acid dew point. The higher the dew point, the wider the corrosion range and the more serious the corrosion.

[0004] With the development of science and technology, technicians in related fields have also made a lot of optimizations on the heat pipe economizer to solve some problems that different consumer groups are concerned about. In order to make a more accurate comparison, a Chinese patent with publication number CN103727522A discloses a heat pipe economizer.

[0005] It includes a water tank, a box body, and a heat pipe. Several heat pipes are arranged and combined longitudinally in the box body. The water tank is fixed on the top of the box body. The heat pipe is filled with liquid working medium. The width of the box body is larger than the width of the water tank. By utilizing heat pipe heat transfer, condensation corrosion and dust blockage can be avoided.

[0006] However, the above heat pipe economizer still has some shortcomings in actual use:

[0007] 1. Although the above-mentioned prior art can increase the contact area between the heat pipe and the flue gas by welding threaded blades, and then remove the dust on the surface of the heat pipe by a sonic soot blower, the sonic soot blower can only clean the dust on the heat pipe adjacent to it. The heat pipe away from the sonic soot blower has a reduced cleaning effect due to the reduction of the sound waves, and even if the dust falls, part of it will accumulate on the spiral blades and cannot be effectively removed, so the cleaning efficiency is low.

[0008] 2. During the long-term operation of the heat pipe in the above-mentioned prior art, the surface of the heat pipe is always at a fixed smoke-facing angle, so the surface will still corrode and cause leakage. After the leakage occurs, the above-mentioned prior art needs to be stopped immediately for maintenance because there is no quick-disassembly structure and response method. Therefore, the stability of the heat pipe during long-term operation cannot be ensured.

[0009] Therefore, based on the above-stated viewpoints, there is still room for improvement in the existing heat pipe low-temperature economizers. Summary of the invention

[0010] In order to solve the above problems, the present invention provides a heat pipe type low-temperature economizer for a power plant, including a water tank, on which a water inlet pipe and a water outlet pipe are respectively arranged, and rectangular plates are symmetrically arranged on one side of the water tank, connecting plates are commonly arranged between the rectangular plates, and the rectangular plates on one side are connected to one side of the water tank, and a plurality of heat pipes are slidably penetrated between the rectangular plates, and a heating element for heating the water in the water tank is arranged on the heat pipe.

[0011] The heating element includes a spiral blade arranged on the outside of the heat pipe. The water tank and the adjacent rectangular plate are jointly provided with a plurality of through grooves corresponding to the heat pipes, and one side of the plurality of heat pipes passes through the corresponding through grooves and is located in the water tank.

[0012] Preferably, a section of the heat pipe located between the rectangular plates is an evaporation section, a section of the heat pipe located in the water tank is a condensation section, and the spiral blades are located on the evaporation section.

[0013] Preferably, a sealing unit for sealing the through groove on the water tank is provided in the water tank, the sealing unit includes several arc plates arranged on the inner walls on both sides of the water tank, and the arc plates correspond one to one with the condensing sections of the heat pipes, an arc groove is opened on the arc plate, an arc cover is slidably arranged in the arc groove, the inner wall of the arc cover is tightly attached to the heat pipe, and the arc groove is provided with reset tension springs on both sides respectively connected to the inner wall of the arc groove and the arc cover.

[0014] Preferably, a plurality of blocking grooves corresponding to the through grooves are provided on one side of the water tank, and an annular rubber ring corresponding to the blocking grooves is provided on one side of the arc-shaped cover.

[0015] Preferably, a cleaning unit for cleaning dust from the spiral blades is commonly provided between the rectangular plates, the cleaning unit comprises a plurality of sliding grooves opened on the two rectangular plates, and the plurality of sliding grooves respectively correspond to two adjacent heat pipes, strip plates are slidably provided in the corresponding sliding grooves on both sides, a V-shaped plate is slidably provided on the strip plates, a pulling spring is commonly provided between the V-shaped plate and the rectangular plate, and semi-arc plates corresponding to the spiral blades on both sides are respectively provided on the extension sections on both sides of the V-shaped plate.

[0016] Preferably, a spiral block in contact with the spiral blade is provided on the inner side of the semi-arc plate, and a wiping brush in contact with the spiral blade is provided on the outer side of the spiral block. Drop grooves are also provided on both sides of the V-shaped plate, and a sliding groove extends from one side of the strip plate. A sealing cloth connected to the strip plate is provided in the corresponding sliding groove.

[0017] Preferably, a mounting assembly for mounting the heat pipe is provided on the rectangular plate on one side, and the mounting assembly includes a plurality of mounting grooves opened on the rectangular plate on one side and corresponding to the heat pipes one by one, a rotating ring is rotatably provided in the mounting groove, and a circular plate is sleeved on one side of the heat pipe, the circular plate is slidably inserted in the corresponding rotating ring, and the rotating ring and the circular plate are connected by keyway transmission, and a handle is provided on one side of the rotating ring of the heat pipe.

[0018] Preferably, a driving unit for providing power to the rotating ring and the strip plate is provided on the rectangular plate on one side, and the driving unit includes a bending plate arranged on the side wall of the rectangular plate on one side, and a plurality of driving screws corresponding to the longitudinal sliding grooves are threadedly connected on the bending plate, and a driving rod located between the corresponding two rotating rings is provided on the upper end of the driving screw, and the driving rod passes through the strip plate corresponding to the longitudinal column and is rotatably connected thereto.

[0019] Preferably, the rectangular plate is also provided with several limit plates corresponding to the sliding grooves one by one, a driving ring is rotatably provided at the lower end of the limit plate, and the corresponding driving rod passes through the driving ring of the corresponding vertical column and is connected thereto by keyway transmission, a plurality of ratchet grooves distributed around its axis are provided on the outside of the rotating ring, and spiral teeth matching the corresponding two ratchet grooves are provided on the outside of the driving ring.

[0020] Preferably, a plurality of drive rings corresponding to the drive screws are rotatably provided on one side of the bending plate, and the drive rings are connected to the corresponding drive screws by keyway transmission, and mutually meshing external gear rings are sleeved on the outer side of the drive rings.

[0021] In summary, the present application includes at least one of the following beneficial technical effects:

[0022] 1. The present invention collects heat from hot air through the heat pipe in the heating element and transfers it to the water tank to heat the water in the water tank. The driving unit drives the heat pipe to rotate through the installation component, so that the heat pipe drives the spiral blades to rotate, thereby increasing the flow speed and turbulence of the surrounding fluid to enhance the heat exchange efficiency. At the same time, the driving unit synchronously drives the cleaning unit to synchronously clean the dust attached to the outer side of the spiral blade to prevent dust accumulation.

[0023] 2. The present invention can fix the heat pipe on the rectangular plate and in the water tank through the installation unit. Similarly, the blocking unit in the water tank can block the through groove on the water tank when replacing the heat pipe to prevent the water in the water tank from leaking, so that there is no need to stop the furnace when replacing the heat pipe.

[0024] 3. During the reciprocating movement of the cleaning unit of the present invention, the scraping assembly can be driven by the cleaning unit to move synchronously, and during the movement, the scraping assembly can scrape off the dust on the inner wall of the boiler box, thereby achieving synchronous cleaning of the dust on the spiral blades and the inner wall of the boiler box, preventing excessive dust accumulation from affecting the hot air circulation and heat exchange of the spiral blades, and further improving the applicability of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0026] Figure 1 It is a schematic diagram of the main body structure of the present invention.

[0027] Figure 2 It is a schematic structural diagram of the heating element of the present invention.

[0028] Figure 3 It is a structural schematic diagram of the plugging unit of the present invention.

[0029] Figure 4 It is a plan cross-sectional view of the plugging unit of the present invention.

[0030] Figure 5 It is a structural schematic diagram of the cleaning unit of the present invention.

[0031] Figure 6 It is a partial structural schematic diagram of the cleaning unit of the present invention.

[0032] Figure 7 It is a plan cross-sectional view of the cleaning unit of the present invention.

[0033] Figure 8 It is a structural schematic diagram of the mounting assembly and the drive unit of the present invention.

[0034] Fig. 9 The present invention Figure 8 A partial enlarged view of the structure at point A.

[0035] Fig.10 It is a structural schematic diagram of the driving unit of the present invention from another perspective.

[0036] Fig.11 The present invention Fig.10 A magnified view of part of the structure at point B.

[0037] Fig.12 The present invention Fig.10 A magnified view of part of the structure at point C in the middle.

[0038] Fig.13 It is a structural schematic diagram of the boiler box of the present invention.

[0039] Fig.14 It is a schematic structural diagram of the scraping assembly of the present invention.

[0040] Fig.15 It is a plan cross-sectional view of the scraping assembly of the present invention.

[0041] In the figure, 1, water tank; 10, water inlet pipe; 11, water outlet pipe; 12, rectangular plate; 13, connecting plate; 14, heat pipe; 2, heating element; 20, spiral blade; 21, evaporation section; 22, condensation section; 3, blocking unit; 30, arc plate; 31, arc groove; 32, arc cover; 33, reset tension spring; 34, blocking groove; 35, annular rubber ring; 4, cleaning unit; 40, sliding groove; 41, strip plate; 42, V-shaped plate; 43, pulling spring; 44, semi-arc plate; 45, spiral block; 46. ​​Drop groove; 5. Mounting assembly; 50. Rotating ring; 51. Round plate; 52. Handle; 6. Driving unit; 60. Bending plate; 61. Driving screw; 62. Driving rod; 63. Limiting plate; 64. Driving ring; 65. Ratchet groove; 66. Spiral teeth; 67. Driving ring; 68. Outer gear ring; 7. Scraping assembly; 70. Boiler box; 71. Sliding groove; 72. Sliding strip; 73. Horizontal plate; 74. Spring rod; 75. Triangular scraper; 76. Receiving groove; 77. Sliding drive plate. DETAILED DESCRIPTION

[0042] The following combination Figures 1 to 15 Embodiments of the present invention are described in detail.

[0043] The embodiment of the present application discloses a heat pipe type low-temperature economizer for a power plant, which explains that the present invention is mainly used in the process of contacting the boiler hot gas through the heat pipe and transferring the heat to the water in the water tank. In terms of technical effect, the heat pipe can be separated into an evaporation section and a condensation section to avoid water dew corrosion, and the heat pipe can be driven to rotate so that the outer side of the heat pipe is in uniform contact with the hot gas to avoid one side of the heat pipe being in a high temperature state for a long time and being damaged; further, even if the heat pipe is damaged, the heat pipe can be separated separately without stopping the boiler.

[0044] Example 1: Reference Figure 1 As shown, it includes a water tank 1, a water inlet pipe 10, a water outlet pipe 11, a rectangular plate 12, a connecting plate 13, a heat pipe 14 and a heating element 2. The water tank 1 is respectively provided with a water inlet pipe 10 and a water outlet pipe 11. Water is injected into the water tank 1 through the water inlet pipe 10, and the water in the water tank 1 can be discharged through the water outlet pipe 11. Rectangular plates 12 are also symmetrically arranged on one side of the water tank 1, and connecting plates 13 are commonly arranged between the rectangular plates 12. The rectangular plate 12 on one side is connected to one side of the water tank 1, and the connecting plate 13 connects the two rectangular plates 12 to each other.

[0045] A plurality of heat pipes 14 are slidably inserted between the rectangular plates 12. The heat pipe 14 is a heat transfer element with extremely high thermal conductivity that transfers heat by evaporation and condensation of liquid in a fully enclosed vacuum tube. It has a series of advantages such as high thermal conductivity, excellent isothermal property, variability of heat flux density, reversibility of heat flow direction, long-distance heat transfer, constant temperature property, etc. The released heat is transferred to the surrounding water through the wall of the heat pipe 14, thereby heating the water. The heat pipe 14 is provided with a heating element 2 for heating the water in the water tank 1. The heat pipe 14 can transfer the remaining heat in the flue gas in the boiler to the water, so that the heating element 2 can heat the water in the water tank 1.

[0046] Reference Figure 2 As shown, the heating element 2 is used to heat the water in the water tank 1; specifically, the heating element 2 includes a spiral blade 20, an evaporation section 21 and a condensation section 22, the spiral blade 20 is arranged on the outside of the heat pipe 14, and the water tank 1 and the adjacent rectangular plate 12 are jointly provided with a plurality of through grooves corresponding to the heat pipes 14, and one end of the plurality of heat pipes 14 passes through the through grooves and is located inside the water tank 1.

[0047] A section of the heat pipe 14 located between the rectangular plates 12 is the evaporation section 21, and a section of the heat pipe 14 located in the water tank 1 is the condensation section 22. The spiral blades 20 are located on the evaporation section 21. The spiral blades 20 on the heat pipe 14 are mainly used to increase the contact area between the evaporation section 21 and the hot gas, so that the evaporation section 21 can fully absorb the heat in the hot gas and efficiently transfer it to the condensation section 22 through the phase change process of the internal working fluid; in addition, the spiral blades 20 can also promote the turbulent flow of hot gas around the heat pipe 14, reduce the thickness of the thermal boundary layer, and further improve the heat transfer efficiency, and finally contact the water in the water tank 1 through the outside of the condensation section 22 to heat the water.

[0048] Furthermore, when driven by external force, the heat pipe 14 can also drive the spiral blades 20 to rotate between the rectangular plates 12, thereby enhancing the heat exchange efficiency by increasing the flow velocity and turbulence of the surrounding fluid. The rotating spiral blades 20 not only expand the heat exchange area, but also promote the uniform distribution and mixing of the hot air, which helps to more effectively transfer the heat in the hot air to the heat pipe 14, thereby improving the overall heat transfer efficiency.

[0049] Reference Figure 3 and Figure 4 As shown, a blocking unit 3 for blocking the through groove on the water tank 1 is provided in the water tank 1; specifically, the blocking unit 3 includes an arc plate 30, an arc groove 31, an arc cover 32, a reset tension spring 33, a blocking groove 34 and an annular rubber ring 35, and several arc plates 30 are arranged on the inner walls on both sides of the water tank 1, and the arc plates 30 correspond to the condensing sections 22 of the heat pipes 14 one by one, and an arc groove 31 is opened on the arc plate 30, and an arc cover 32 is slidably provided in the arc groove 31, and the arc cover 32 can reciprocate under the limit of the arc groove 31 when driven by an external force; The inner wall of the arc cover 32 is tightly attached to the heat pipe 14, and a reset tension spring 33 is provided in the arc groove 31, which is connected to the inner wall of the arc groove 31 and the arc cover 32 on both sides respectively. A plurality of blocking grooves 34 corresponding to the through grooves are opened on one side of the water tank 1, and an annular rubber ring 35 corresponding to the blocking groove 34 is provided on one side of the arc cover 32. The reset tension spring 33 pulls the arc cover 32 to be tightly attached to one side of the water tank 1 in the initial state. At this time, the annular rubber ring 35 is located in the corresponding blocking groove 34 to block the corresponding through groove to prevent the water in the water tank 1 from being discharged through the through groove.

[0050] When the heat pipe 14 is inserted into the water tank 1 through the through groove, the condensing section 22 of the heat pipe 14 will contact the inner side of the arc cover 32 and push the arc cover 32 to move. At this time, the arc cover 32 no longer drives the annular rubber ring 35 to indirectly block the corresponding through groove. However, the outer wall of the heat pipe 14 is tightly attached to the inner wall of the through groove. Therefore, the water in the water tank 1 will not be discharged through the through groove. That is, when the heat pipe 14 is inserted into the water tank 1, the water in the water tank 1 will not leak.

[0051] Similarly, if the heat pipe 14 needs to be replaced at this time, the heat pipe 14 is pulled out from the through groove. During this process, the corresponding arc cover 32 will move synchronously with the condensing section 22 under the drive of the reset tension spring 33, and finally the arc cover 32 with the annular rubber ring 35 is inserted into the sealing groove 34 to seal the through groove, and then the heat pipe 14 is taken out from the through groove on the water tank 1, and the water in the water tank 1 will not leak.

[0052] Reference Figure 5 , Figure 6 and Figure 7 As shown, a cleaning unit 4 for cleaning dust from the spiral blades 20 is commonly provided between the rectangular plates 12; specifically, the cleaning unit 4 includes a sliding groove 40, a strip plate 41, a V-shaped plate 42, a pulling spring 43, a semi-arc plate 44, a spiral block 45 and a dropping groove 46, several sliding grooves 40 are provided on the two rectangular plates 12, and several sliding grooves 40 correspond to two adjacent heat pipes 14 respectively, strip plates 41 are slidably provided in the corresponding sliding grooves 40 on both sides, and V-shaped plates 42 are slidably provided on the strip plates 41, and a pulling spring 43 is commonly provided between the V-shaped plate 42 and the rectangular plate 12, that is, the strip plate 41 can drive the V-shaped plate 42 to move in the up and down directions under the limit of the corresponding two sliding grooves 40, and the V-shaped plate 42 can move in the left and right directions on the strip plate 41 when driven by external force, and in the initial state, the pulling spring 43 pulls the V-shaped plate 42 to be tightly attached to the rectangular plate 12 on one side.

[0053] The two side extensions of the V-shaped plate 42 are provided with semi-arc plates 44 corresponding to the spiral blades 20 on both sides, and the inner side of the semi-arc plates 44 is provided with a spiral block 45 in contact with the spiral blade 20, and the outer side of the spiral block 45 is provided with a wiping brush (not shown in the figure) in contact with the spiral blade 20, that is, the spiral block 45 is threadedly connected to the spiral blade 20. When the spiral blade 20 rotates, the V-shaped plate 42 can be driven by the spiral block 45 and the arc plate 30 to move in the left and right directions on the strip plate 41. The spiral block 45 is moved to the outside of the spiral blade 20, and the dust on the outside of the spiral blade 20 is wiped off. The V-shaped plate 42 moves to clean the dust on the outside of the entire spiral blade 20. When the V-shaped plate 42 moves to contact the rectangular plate 12, the strip plate 41 moves down so that the spiral block 45 is no longer in contact with the spiral blade 20. The V-shaped plate 42 is pulled back to the initial position by the pulling force of the pulling spring 43, and the reciprocating movement is achieved.

[0054] Drop grooves 46 are also provided on both sides of the V-shaped plate 42, and a sliding groove 40 extends from one side of the strip plate 41, and a sealing cloth (not shown in the figure) connected to the strip plate 41 is provided in the corresponding sliding groove 40, and the wiped dust can fall to the lower end through the drop groove 46. The present invention is installed inside the boiler, so the two sides of the rectangular plate 12 are located outside the boiler, and the sealing plate is used to prevent the gas between the rectangular plates 12 from leaking into the air from the sliding groove 40.

[0055] Reference Figure 8 and Fig. 9 As shown, a mounting assembly 5 for mounting a heat pipe 14 is provided on a rectangular plate 12 on one side; specifically, the mounting assembly 5 includes a rotating ring 50, a circular plate 51 and a handle 52. Several mounting grooves are provided on the rectangular plate 12 on one side and correspond to the heat pipe 14 one by one. A rotating ring 50 is rotatably provided in the mounting groove, and a circular plate 51 is sleeved on one side of the heat pipe 14. The circular plate 51 is slidably inserted into the corresponding rotating ring 50, and the rotating ring 50 and the circular plate 51 are connected by keyway transmission, and a handle 52 is provided on one side of the rotating ring 50 where the heat pipe 14 is located. That is, in the initial situation, the heat pipe 14 is inserted between the rectangular plates 12 through the mounting groove, and then enters the water tank 1 through the through groove. At this time, the circular plate 51 will be located in the rotating ring 50 and connected to the rotating ring 50 by a keyway.

[0056] The circular plate 51 can also seal the gap inside the rotating ring 50 to prevent hot air leakage, and a clamping device is provided at the keyway connection point between the heat pipe 14 and the rotating ring 50. The clamping device is a prior art. After the keyway connection is completed, the circular plate 51 is clamped on the rotating ring 50 to prevent the heat pipe 14 from accidentally slipping off. When the heat pipe 14 needs to be replaced, a pulling force is applied to the handle 52. At this time, the pulling force is greater than the clamping force of the clamping device, so that the circular plate 51 can be separated from the rotating ring 50 and the heat pipe 14 can be taken out of the installation groove.

[0057] Continue to refer to Figure 8 , Fig. 9 , Fig.10 , Fig.11 and Fig.12 As shown, the rectangular plate 12 on one side is provided with a driving unit 6 for providing power to the rotating ring 50 and the strip plate 41; specifically, the driving unit 6 includes a bending plate 60, a driving screw 61, a driving rod 62, a limiting plate 63, a driving ring 64, a ratchet groove 65, a spiral tooth 66, a driving ring 67 and an outer gear ring 68. The bending plate 60 is arranged on the side wall of the rectangular plate 12 on one side. A plurality of driving screws 61 corresponding to the longitudinal sliding grooves 40 are threadedly connected to the bending plate 60. The bending plate 60 is used to limit the driving screw 61, and when the driving screw 61 is driven by an external force to rotate on the bending plate 60, it can move in the up and down directions by different rotation directions.

[0058] A driving rod 62 located between the corresponding two rotating rings 50 is provided at the upper end of the driving screw 61, and the driving rod 62 passes through the strip plate 41 corresponding to the vertical column and is rotatably connected thereto. The driving rod 62 can move up and down and rotate with the driving screw 61, that is, the driving rod 62 can indirectly drive the spiral block 45 to contact the spiral blade 20 through the strip plate 41.

[0059] The rectangular plate 12 is also provided with several limit plates 63 corresponding to the sliding grooves 40 one by one, and a driving ring 64 is rotatably provided at the lower end of the limit plate 63, and the corresponding driving rod 62 passes through the driving ring 64 of the corresponding vertical column and is connected thereto by keyway transmission, that is, the driving rod 62 can drive the corresponding driving ring 64 to rotate by keyway transmission, and will not interfere with the driving ring 64 when the driving rod 62 moves in the up and down directions; the outer side of the rotating ring 50 is provided with several ratchet grooves 65 distributed around its axis, and the outer side of the driving ring 64 is provided with spiral teeth 66 matching the corresponding two ratchet grooves 65, that is, when the driving ring 64 rotates, it can also drive the rotating rings 50 on both sides to rotate through the corresponding spiral teeth 66 and ratchet grooves 65, so that the rotating ring 50 can indirectly drive the corresponding heat pipe 14 to rotate.

[0060] Several drive rings 67 corresponding to the drive screw 61 are rotatably arranged on one side of the bending plate 60, and the drive ring 67 is connected to the corresponding drive screw 61 by keyway transmission. The outer side of the drive ring 67 is provided with mutually meshing external gear rings 68, that is, the external gear ring 68 on one side is meshed with the external drive device and is driven to rotate by the external drive device, and the other external gear rings 68 will also drive the corresponding drive ring 67 to rotate, and the rotations between adjacent drive rings 67 are opposite, and the drive ring 67 drives the corresponding drive screw 61 to rotate by keyway transmission.

[0061] The driving screw 61 synchronously drives the spiral teeth 66 on the outside of the corresponding driving ring 64 to rotate, so that the spiral teeth 66 can drive the two adjacent rotating rings 50 to rotate in the opposite direction through the ratchet groove 65. The purpose of the gear rings engaging with each other to perform the reverse action is to prevent the two sides of the ratchet groove 65 from being engaged with the two spiral teeth 66. If the two spiral teeth 66 rotate in the same direction, interference problems will occur.

[0062] Then, the rotating ring 50 will indirectly drive the heat pipe 14 to rotate, and the spiral blades 20 on the outer sides of adjacent heat pipes 14 are also symmetrically distributed in opposite directions, and the spiral blocks 45 on both sides of the V-shaped plate 42 are also symmetrically distributed. In this way, when the spiral blades 20 on both sides rotate in opposite directions, the V-shaped plate 42 will also be driven to move in one direction without interfering with the spiral blades 20.

[0063] When the spiral blade 20 moves upward, the spiral block 45 can contact the spiral blade 20 and indirectly drive the V-shaped plate 42 to move. When the strip plate 41 moves to the top of the sliding groove 40, one side of the V-shaped plate 42 has contacted the rectangular plate 12 on one side. At this time, the driving screw 61 is indirectly driven by the external driving device to rotate in the opposite direction, so that the V-shaped plate 42 moves in the opposite direction. Finally, when the strip plate 41 moves to the bottom of the sliding groove 40, the spiral no longer contacts the spiral blade 20. At this time, the heat pipe 14 connected to the spiral blade 20 can be taken out of the installation groove.

[0064] Example 2: Reference Fig.13 , Fig.14 and Fig.15 As shown, on the basis of embodiment 1, it includes a boiler box 70, square grooves are opened on both sides of the boiler box 70, and two rectangular plates 12 are installed in the square grooves in a detachable manner, and a scraping assembly 7 for scraping dust on the inner wall of the boiler box 70 is provided on the connecting plate 13; specifically, the scraping assembly 7 includes a boiler box 70, a sliding groove 71, a sliding strip 72, a cross plate 73, a spring rod 74, a triangular scraper 75, a receiving groove 76 and a sliding drive plate 77, the sliding groove 71 is opened at the opposite ends of the upper and lower corresponding connecting plates 13, and a plurality of sliding strips 72 are slidably arranged between the upper and lower corresponding sliding grooves 71, and adjacent sliding strips 72 are connected by a cross plate 73, the sliding strips 72 can move back and forth in the sliding groove 71, and the cross plate 73 is used to connect multiple sliding strips 72 on one side.

[0065] A plurality of spring rods 74 are provided on one side of the sliding strip 72 facing the inner wall of the corresponding boiler box body 70, and a triangular scraper 75 is provided at the telescopic end of the corresponding spring rod 74, and the triangular scraper 75 is in close contact with the inner wall of the boiler box body 70. The spring rod 74 pushes the corresponding triangular scraper 75 to contact with the inner wall of the boiler box body 70, scraping off the dust attached to the inner wall of the boiler box body 70, so as to prevent too much dust from being attached to the inner wall of the boiler box body 70 when the boiler box body 70 is used for a long time.

[0066] A receiving groove 76 is provided on one side of the sliding strip 72, and a sliding drive plate 77 is provided between the receiving groove 76 and the adjacent V-shaped plate 42, and the sliding drive plate 77 is slidably connected to the receiving groove 76, that is, when the V-shaped plate 42 reciprocates on the strip plate 41, the corresponding V-shaped plate 42 can drive the sliding strip 72 to move through the sliding drive plate 77 and the receiving groove 76, so that the triangular scraper 75 is indirectly driven to scrape the side wall of the boiler, and when the V-shaped groove is driven to descend by the strip plate 41, the corresponding sliding drive plate 77 can move up and down in the receiving groove 76 without interfering with the sliding strip 72.

[0067] During operation: In the first step, when the hot air passes through the heating element 2, the heat pipe 14 in the heating element 2 collects the heat in the hot air and transfers it to the water tank 1 to heat the water in the water tank 1.

[0068] Step 2: The driving unit 6 drives the heat pipe 14 to rotate through the installation component 5, so that the heat pipe 14 drives the spiral blade 20 to rotate, so as to increase the flow speed and turbulence of the surrounding fluid to enhance the heat exchange efficiency. At the same time, the driving unit 6 synchronously drives the cleaning unit 4 to synchronously clean the dust attached to the outside of the spiral blade 20 to prevent dust accumulation.

[0069] Step 3: The heat pipe 14 can be fixed to the rectangular plate 12 and the water tank 1 through the installation unit. Similarly, the blocking unit 3 in the water tank 1 can block the through groove on the water tank 1 when replacing the heat pipe 14 to prevent the water in the water tank 1 from leaking.

[0070] Step 4: During the reciprocating movement of the cleaning unit 4, the scraping assembly 7 can be driven by the cleaning unit 4 to move synchronously, and during the movement, the scraping assembly 7 can scrape off the dust on the inner wall of the boiler box 70. In this way, the dust on the spiral blade 20 and the inner wall of the boiler box 70 can be cleaned synchronously, preventing excessive dust accumulation from affecting the hot air circulation and heat exchange of the spiral blade 20, thereby further improving the applicability of the present invention.

[0071] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be considered as exemplary and non-restrictive in all respects.

[0072] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A heat pipe type low-temperature economizer for a power plant, comprising a water tank (1), characterized in that: The water tank (1) is provided with a water inlet pipe (10) and a water outlet pipe (11), and rectangular plates (12) are symmetrically provided on one side of the water tank (1). A connecting plate (13) is provided between the rectangular plates (12), and the rectangular plates (12) on one side are connected to one side of the water tank (1). A plurality of heat pipes (14) are slidably provided between the rectangular plates (12), and a heating element (2) for heating water in the water tank (1) is provided on the heat pipe (14); The heating element (2) comprises a spiral blade (20) arranged outside the heat pipe (14); the water tank (1) and the adjacent rectangular plate (12) are provided with a plurality of through grooves corresponding to the heat pipes (14) one by one, and one end of the plurality of heat pipes (14) passes through the through grooves and is located inside the water tank (1); The section of the heat pipe (14) located between the rectangular plates (12) is the evaporation section (21), the section of the heat pipe (14) located inside the water tank (1) is the condensation section (22), and the spiral blade (20) is located on the evaporation section (21); The water tank (1) is provided with a blocking unit (3) for blocking the through groove on the water tank (1), the blocking unit (3) comprising a plurality of arc-shaped plates (30) arranged on the inner walls on both sides of the water tank (1), and the arc-shaped plates (30) correspond one to one with the condensing sections (22) of the heat pipe (14), the arc-shaped plates (30) are provided with an arc-shaped groove (31), an arc-shaped cover (32) is slidably arranged in the arc-shaped groove (31), the inner side wall of the arc-shaped cover (32) is tightly attached to the heat pipe (14), and a reset tension spring (33) is arranged on both sides of the arc-shaped groove (31) and is respectively connected to the inner wall of the arc-shaped groove (31) and the arc-shaped cover (32); A plurality of blocking grooves (34) corresponding to the through grooves are provided on one side of the water tank (1), and an annular rubber ring (35) corresponding to the blocking grooves (34) is provided on one side of the arc-shaped cover (32).

2. The heat pipe type low-temperature economizer for a power plant according to claim 1, characterized in that: A cleaning unit (4) for cleaning dust from the spiral blades (20) is provided between the rectangular plates (12). The cleaning unit (4) comprises a plurality of sliding grooves (40) provided on the two rectangular plates (12), and the plurality of sliding grooves (40) respectively correspond to two adjacent heat pipes (14). Strip plates (41) are slidably provided in the corresponding sliding grooves (40) on both sides, a V-shaped plate (42) is slidably provided on the strip plate (41), a pulling spring (43) is provided between the V-shaped plate (42) and the rectangular plate (12), and semi-arc plates (44) corresponding to the spiral blades (20) on both sides are provided on the extension sections on both sides of the V-shaped plate (42).

3. The heat pipe type low-temperature economizer for a power plant according to claim 2, characterized in that: A spiral block (45) in contact with the spiral blade (20) is arranged on the inner side of the semi-arc plate (44), and a wiping brush in contact with the spiral blade (20) is arranged on the outer side of the spiral block (45). Drop grooves (46) are also provided on both sides of the V-shaped plate (42), and a sliding groove (40) extends from one side of the strip plate (41), and a sealing cloth connected to the strip plate (41) is arranged in the corresponding sliding groove (40).

4. The heat pipe type low-temperature economizer for a power plant according to claim 1, characterized in that: A mounting assembly (5) for mounting a heat pipe (14) is provided on the rectangular plate (12) on one side. The mounting assembly (5) comprises a plurality of mounting grooves which are opened on the rectangular plate (12) on one side and correspond to the heat pipes (14) one by one. A rotating ring (50) is rotatably provided in the mounting groove. A circular plate (51) is sleeved on one side of the heat pipe (14). The circular plate (51) is slidably inserted into the corresponding rotating ring (50). The rotating ring (50) and the circular plate (51) are connected to each other by keyway transmission. A handle (52) is provided on one side of the heat pipe (14) located on the rotating ring (50).

5. The heat pipe type low-temperature economizer for a power plant according to claim 4, characterized in that: A driving unit (6) for providing power to the rotating ring (50) and the strip plate (41) is arranged on the rectangular plate (12) on one side, and the driving unit (6) comprises a bending plate (60) arranged on the side wall of the rectangular plate (12) on one side, and a plurality of driving screws (61) corresponding to the longitudinal sliding grooves (40) are threadedly connected on the bending plate (60), and a driving rod (62) located between the corresponding two rotating rings (50) is arranged at the upper end of the driving screw (61), and the driving rod (62) passes through the strip plate (41) corresponding to the longitudinal column and is rotatably connected thereto.

6. The heat pipe type low-temperature economizer for a power plant according to claim 5, characterized in that: The rectangular plate (12) is further provided with a plurality of limit plates (63) corresponding to the sliding grooves (40) one by one, and a driving ring (64) is rotatably provided at the lower end of the limit plate (63), and the corresponding driving rod (62) passes through the driving ring (64) of the corresponding longitudinal column and is connected thereto by keyway transmission. The outer side of the rotating ring (50) is provided with a plurality of ratchet grooves (65) distributed around its axis, and the outer side of the driving ring (64) is provided with spiral teeth (66) matching with the corresponding two ratchet grooves (65).

7. The heat pipe type low-temperature economizer for a power plant according to claim 5, characterized in that: A plurality of drive rings (67) corresponding to the drive screws (61) are rotatably arranged on one side of the bending plate (60), and the drive rings (67) are connected to the corresponding drive screws (61) by keyway transmission. The outer side of the drive rings (67) is sleeved with outer gear rings (68) that mesh with each other.

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