Parallel flue gas cooling heat exchanger

Abstract

The application discloses a parallel flue gas cooling heat exchanger and relates to the technical field of heat exchangers. The parallel flue gas cooling heat exchanger comprises a flow regulating mechanism and parallel heat exchange pipes installed in the middle of the flow regulating mechanism. A cleaning mechanism is arranged outside the flow regulating mechanism, and a rotating rod is arranged inside the cleaning mechanism. The flow regulating mechanism comprises a flow regulating pipe. An adjusting conical groove is formed in the inner side of the end of the flow regulating pipe. A limiting support is fixedly installed inside the flow regulating pipe. A plurality of limiting sliding rails are slidably connected to the inside of the limiting support. The size of the cooling water flow in each parallel heat exchange pipe is controlled, the water flow in each parallel heat exchange pipe is substantially equal, the cooling water in each parallel heat exchange pipe can be fully exchanged with high-temperature flue gas, insufficient heat exchange caused by insufficient flow of some parallel heat exchange pipes is avoided, the overall heat exchange efficiency can be increased by more than 15%, and the flue gas cooling effect is uniform and stable.

Description

Technical Field

[0001] This invention relates to the field of heat exchanger technology, specifically to a parallel flue gas cooling heat exchanger. Background Technology

[0002] A heat exchanger is a device that transfers part of the heat from a hot fluid to a cold fluid. It is also called a heat exchanger. Heat exchangers play an important role in chemical, petroleum, power, food and many other industrial productions. In chemical production, heat exchangers can be used as heaters, coolers, condensers, evaporators and reboilers, etc., and are widely used.

[0003] Publication No. CN220959722U discloses a parallel shell-and-tube heat exchanger. By setting an angle between the inlet and outlet pipes, it achieves a compact structure, facilitating installation and after-sales maintenance. The parallel connection allows for a reasonable arrangement of the shells even with a large number of shells, maintaining both compactness and ease of maintenance. However, this patent still has the following problems in practical use: Although this parallel shell-and-tube heat exchanger achieves a compact structure and facilitates installation and after-sales maintenance by setting an angle between the inlet and outlet pipes, it still suffers from several drawbacks during flue gas heat exchange. While the parallel connection improves heat exchange efficiency, differences in inherent fluid dynamics, imbalanced flow distribution leading to pressure differences, and deviations between the structure and operating conditions can cause uneven water pressure in the parallel pipes. This uneven pressure results in significant deviations in flow distribution from the design values ​​in each branch, with some pipes having excessively high flow rates and others having insufficient flow rates. This negatively impacts the heat exchanger's performance. If the flue gas is operating at high temperatures, the uneven cooling water flow cannot match the high-temperature flue gas, leading to insufficient cooling medium in some pipes, causing localized overheating, vaporization, and other problems. This further degrades heat exchange stability and may even pose safety hazards to the equipment.

[0004] Therefore, a parallel flue gas cooling heat exchanger is proposed to solve the problems mentioned above. Summary of the Invention

[0005] The purpose of this invention is to provide a parallel flue gas cooling heat exchanger to solve the problem mentioned in the background art: during the heat exchange of flue gas, although the parallel method improves the heat exchange efficiency, differences in inherent fluid dynamic characteristics, imbalances in flow distribution leading to water pressure differences, and deviations in structure and operating conditions can cause uneven water pressure in the parallel pipes of the parallel flue gas cooling heat exchanger. Uneven water pressure in the parallel pipes can cause the flow distribution of each branch to deviate significantly from the design value, with some pipes having excessive flow and others having insufficient flow, thereby affecting the heat exchanger's heat exchange effect. If the flue gas side is under high-temperature conditions, the uneven flow of cooling water cannot match the high-temperature flue gas, resulting in insufficient cooling medium in some pipes, leading to problems such as local overheating and vaporization, further damaging heat exchange stability, and even causing equipment safety hazards.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a parallel flue gas cooling heat exchanger, comprising a flow regulating mechanism and parallel heat exchange tubes installed in the middle of the flow regulating mechanism; A cleaning mechanism is provided on the outside of the flow regulating mechanism, and a rotating rod is provided inside the cleaning mechanism; Also includes: The flow regulating mechanism includes a flow regulating tube, an regulating conical groove is provided on the inner side of the end of the flow regulating tube, and a limit bracket is fixedly installed inside the flow regulating tube. The limiting bracket has several limiting slide rails slidably connected inside, and an adjusting threaded sleeve is fixedly installed inside the limiting slide rail. The adjusting threaded sleeve has an adjusting threaded hole inside. One side of the adjusting threaded sleeve is fixedly installed with an anti-corrosion spring, and the end of the anti-corrosion spring is fixedly connected to an adjusting piston.

[0007] Preferably, one end of the parallel heat exchange tube is rotatably connected to a first connecting pipe, the end of the first connecting pipe is fixedly installed with a first bend, the end of the first bend is fixedly installed with a flow divider, an inlet valve is fixedly installed on the outside of the flow divider, and a first flow meter is fixedly installed on one side of the inside of the first connecting pipe.

[0008] Preferably, a connecting bracket is fixedly installed on one side of the inside of the first connecting tube, a first gear protective cover is fixedly installed inside the connecting bracket, an adjusting knob is rotatably connected to the top side of the first connecting tube, and a first sealing support is fixedly installed on the outside of the first connecting tube near the adjusting knob, the first sealing support being rotatably connected to the adjusting knob.

[0009] Preferably, an adjustment connecting shaft is fixedly installed at the bottom of the adjustment knob, a bevel gear transmission assembly is fixedly installed at the bottom of the adjustment connecting shaft, an adjustment threaded rod is fixedly installed at one end of the bevel gear transmission assembly, the adjustment threaded rod and the adjustment connecting shaft are rotatably connected to the first gear protective cover, and the adjustment threaded rod is slidably connected to the adjustment piston.

[0010] Preferably, the adjusting threaded rod is threadedly connected to the adjusting threaded sleeve through the adjusting threaded hole, and the end of the parallel heat exchange tube away from the first connecting tube is rotatably connected to the second connecting tube. A second flow meter is fixedly installed on one side inside the second connecting tube, a second bend is fixedly installed at the end of the second connecting tube, a manifold is fixedly installed at the end of the second bend, and a drain valve is fixedly installed at the end of the manifold.

[0011] Preferably, the cleaning mechanism includes a heat exchanger housing, with support legs symmetrically installed at the bottom of the heat exchanger housing, an air inlet valve fixedly installed on one side of the top of the heat exchanger housing, an air outlet valve fixedly installed on one side of the bottom of the heat exchanger housing, and rotating outer disks rotatably connected to both ends of the heat exchanger housing. A second gear protective cover is fixedly installed at the center of the outer side of one side of the rotating outer disk, and the rotating outer disk is rotatably connected to the first connecting pipe and the second connecting pipe respectively.

[0012] Preferably, a cleaning motor is fixedly installed on the bottom outer side of the second gear protective cover, a cleaning main gear is fixedly connected to the output end of the cleaning motor, a cleaning gear ring is meshed with the top of the cleaning main gear, a rotating rod is fixedly installed inside the cleaning gear ring, and rotating gears are fixedly installed at both ends of the rotating rod, with several meshing gears meshing with the outer side of the rotating gear.

[0013] Preferably, a rotating inner disk is rotatably connected to the inner side of the meshing gear, and a plurality of cleaning spiral blades are fixedly connected between the two rotating inner disks. The cleaning spiral blades are in close contact with the inner wall of the heat exchanger shell. A meshing outer ring is meshed with the outer side of the meshing gear. The parallel heat exchange tubes are fixedly installed inside the meshing gear. First centrifugal sliding rods are symmetrically installed around the outer periphery of the rotating rod. A first centrifugal spring assembly is fixedly installed at the end of the first centrifugal sliding rod. A first centrifugal sleeve is fixedly installed on the outer side of the first centrifugal spring assembly. The meshing outer ring is fixedly installed inside the heat exchanger shell.

[0014] Preferably, a cleaning shovel is fixedly installed at the end of the first centrifugal sleeve, and mounting plates are fixedly installed on both sides of the bottom of the cleaning shovel. A plurality of second centrifugal sleeves are fixedly installed inside the mounting plates. A second centrifugal spring assembly is fixedly installed on the bottom inner side of the second centrifugal sleeve. A centrifugal slider is fixedly installed on the top of the second centrifugal spring assembly. A second centrifugal sliding rod is fixedly installed on the top of the centrifugal slider. A cleaning plate is fixedly installed on the top of the second centrifugal sliding rod. A cleaning brush is fixedly installed on the top of the cleaning plate.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: This parallel flue gas cooling heat exchanger utilizes the gap between the adjusting piston and the adjusting conical groove at the end of the flow regulating pipe to control the water flow rate. Under the monitoring of the first and second flow meters, the cooling water flow rate in each parallel heat exchange tube is controlled, ensuring that the water flow rate inside each parallel heat exchange tube is approximately equal. This allows the cooling water in each parallel heat exchange tube to fully exchange heat with the high-temperature flue gas, avoiding insufficient heat exchange caused by insufficient flow in some parallel heat exchange tubes. The overall heat exchange efficiency can be improved by more than 15%, ensuring uniform flue gas cooling effect. The system is stable and uniform. Through the elastic force of the second centrifugal spring assembly inside the mounting plate, the centrifugal slider moves the second centrifugal sliding rod and the cleaning plate outwards. This allows the cleaning brush to initially contact the surface of the parallel heat exchange tubes, providing preliminary cleaning of the dust particles adsorbed on the surface. When a large amount of clumped particles adhere to the surface of the parallel heat exchange tubes, the rotation speed of the rotating rod is increased, and the centrifugal force is amplified. This increases the contact speed of the cleaning shovel with the surface of the parallel heat exchange tubes, allowing for the removal of these clumped particles and further improving the heat exchange efficiency of the parallel heat exchange tubes. The specific details are as follows: 1. By setting up a flow regulation mechanism, not only can the flue gas cooling water be introduced into the distributor cylinder via the inlet valve, but it can also be distributed to the first bend pipe and the first connecting pipe. The flow rate of the cooling water entering the parallel heat exchange tubes can be observed through the first flow meter on one side of the first connecting pipe. By rotating the adjustment knob, the adjustment connecting shaft and the bevel gear transmission assembly can be rotated. At the same time, the bevel gear transmission assembly drives the adjustment threaded rod to rotate. Utilizing the threaded connection between the adjustment threaded rod and the adjustment threaded hole inside the adjustment threaded sleeve, the adjustment threaded sleeve drives the limit slide rail to slide inside the limit bracket. Simultaneously, the adjustment threaded sleeve drives the anti-corrosion spring and the adjustment piston to move. The adjustment piston and the adjustment conical groove at the end of the flow regulation pipe are used to adjust the flow. The gap adjustment controls the water flow rate. Under the monitoring of the first and second flow meters, the cooling water flow rate in each parallel heat exchange tube is controlled, so that the water flow rate inside each parallel heat exchange tube is approximately equal. This ensures that the cooling water in each parallel heat exchange tube can fully exchange heat with the high-temperature flue gas, avoiding insufficient heat exchange caused by insufficient flow in some parallel heat exchange tubes. The overall heat exchange efficiency can be improved by more than 15%, ensuring uniform and stable flue gas cooling effect. After the flow rate is evenly distributed, the flow of cooling water in each parallel heat exchange tube is smoother, and there will be no additional resistance caused by excessive flow velocity in some parallel heat exchange tubes. This effectively reduces the pressure loss of the entire cooling water system and reduces the energy consumption of the circulating water pump. 2. By setting up a cleaning mechanism, high-temperature flue gas can be introduced into the heat exchanger shell through the inlet valve on one side of the top. Simultaneously, the cleaning motor drives the main cleaning gear to rotate. Utilizing the meshing connection between the main cleaning gear and the cleaning gear ring, the cleaning gear ring drives the rotating rod and rotating gear to rotate. The meshing connection between the rotating gear, the meshing gear, and the meshing outer ring allows the meshing gear to drive the parallel heat exchange tubes to rotate independently, and simultaneously drives the rotating inner disc and the parallel heat exchange tubes to revolve. This revolve of the parallel heat exchange tubes ensures thorough mixing of the cooling water and high-temperature flue gas inside the tubes, further improving the heat exchange efficiency. At the same time, the rotating inner disc drives the cleaning spiral blades to rotate, cleaning the flue gas particulate impurities adhering to the inner wall of the heat exchanger shell. To avoid the absorption of excessive particulate impurities in the flue gas and thus improve heat exchange efficiency, the rotating rod drives the first centrifugal sliding rod to rotate. Under the elastic force of the first centrifugal spring assembly, the first centrifugal sleeve drives the cleaning shovel to unfold. Through the elastic force of the second centrifugal spring assembly inside the mounting plate, the centrifugal slider drives the second centrifugal sliding rod and the cleaning plate to move outward, allowing the cleaning brush to first contact the surface of the parallel heat exchange tubes. This allows for the initial cleaning of the flue gas particulate impurities adsorbed on the surface of the parallel heat exchange tubes. When a large amount of clumped particulate impurities adhere to the surface of the parallel heat exchange tubes, the rotation speed of the rotating rod is increased, and the centrifugal force is increased, allowing the cleaning shovel to contact the surface of the parallel heat exchange tubes. The cleaning shovel can then clean the large amount of clumped particulate impurities, further improving the heat exchange efficiency of the parallel heat exchange tubes. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the present invention; Figure 2 This is a three-dimensional structural diagram of the flow regulation mechanism in this invention; Figure 3 This is a three-dimensional structural diagram of the diverter and inlet valve in this invention; Figure 4 This is a three-dimensional structural diagram of the cross-section of the first connecting pipe in this invention; Figure 5 This is a three-dimensional structural diagram of the cross-section of the flow divider in this invention; Figure 6 This is a three-dimensional structural diagram of the limiting bracket and adjusting threaded sleeve in this invention; Figure 7 This is a three-dimensional structural diagram of the parallel heat exchanger tube in this invention; Figure 8 This is a three-dimensional cross-sectional structural diagram of the cleaning mechanism in this invention; Figure 9 This is a three-dimensional structural diagram of the rotating inner disk and the cleaning spiral blade in this invention; Figure 10This is a three-dimensional structural diagram of the cleaning shovel in this invention; Figure 11 This is a three-dimensional structural diagram of the cross-section of the second centrifugal sleeve in this invention.

[0017] In the diagram: 1. Flow regulating mechanism; 101. Parallel heat exchange tubes; 102. First connecting pipe; 103. First bend; 104. Diverter; 105. Inlet valve; 106. First flow meter; 107. First gear protective cover; 108. Connecting bracket; 109. Adjusting knob; 110. First sealing support; 111. Adjusting connecting shaft; 112. Bevel gear transmission assembly; 113. Adjusting threaded rod; 114. Flow regulating pipe; 115. Adjusting conical groove; 116. Limiting bracket; 117. Limiting slide rail; 118. Adjusting threaded sleeve; 119. Adjusting threaded hole; 120. Corrosion-resistant spring; 121. Adjusting piston; 122. Second connecting pipe; 123. Second flow meter; 124. Second bend; 125. Manifold; 126. Drainage 1. Valve; 2. Cleaning mechanism; 201. Heat exchanger shell; 202. Support leg; 203. Inlet valve; 204. Exhaust valve; 205. Rotating outer disk; 206. Second gear protective cover; 207. Cleaning motor; 208. Cleaning main gear; 209. Cleaning gear ring; 210. Rotating rod; 211. Rotating gear; 212. Meshing gear; 213. Rotating inner disk; 214. Cleaning spiral blade; 215. Meshing outer ring; 216. First centrifugal sliding rod; 217. First centrifugal spring assembly; 218. First centrifugal sleeve; 219. Cleaning shovel; 220. Mounting plate; 221. Second centrifugal sleeve; 222. Second centrifugal spring assembly; 223. Centrifugal slider; 224. Second centrifugal sliding rod; 225. Cleaning plate; 226. Cleaning brush. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] Please see Figures 1-6 , Figure 9The present invention provides a technical solution: a parallel flue gas cooling heat exchanger, including a flow regulating mechanism 1 and a parallel heat exchange tube 101 installed in the middle of the flow regulating mechanism 1. A cleaning mechanism 2 is provided on the outside of the flow regulating mechanism 1, and a rotating rod 210 is provided inside the cleaning mechanism 2. The flow regulating mechanism 1 includes a flow regulating pipe 114. An adjusting conical groove 115 is opened on the inner side of the end of the flow regulating pipe 114. A limiting bracket 116 is fixedly installed inside the flow regulating pipe 114. A plurality of limiting slide rails 117 are slidably connected inside the limiting slide rails 117. An adjusting threaded sleeve 118 is fixedly installed inside the limiting slide rails 117. An adjusting threaded hole 119 is opened inside the adjusting threaded sleeve 118. A corrosion-resistant material is fixedly installed on one side of the adjusting threaded sleeve 118. Spring 120, the end of which is fixedly connected to adjusting piston 121, allows flue gas cooling water to be introduced into the diverter 104 via water inlet valve 105. The water is then diverted through the diverter 104 to the first bend 103 and the first connecting pipe 102. The flow rate of the cooling water entering the parallel heat exchange tube 101 is observed by the first flow meter 106 on one side inside the first connecting pipe 102. By rotating the adjusting knob 109, the adjusting connecting shaft 111 and the bevel gear transmission assembly 112 are rotated. At the same time, the bevel gear transmission assembly 112 drives the adjusting threaded rod 113 to rotate. Utilizing the threaded connection between the adjusting threaded rod 113 and the adjusting threaded hole 119 inside the adjusting threaded sleeve 118, the adjusting threaded sleeve 118 drives the limiting slide rail 117 to slide inside the limiting bracket 116.

[0020] Please see Figures 2-7One end of the parallel heat exchange tube 101 is rotatably connected to a first connecting pipe 102. A first bend 103 is fixedly installed at the end of the first connecting pipe 102. A flow divider 104 is fixedly installed at the end of the first bend 103. An inlet valve 105 is fixedly installed on the outside of the flow divider 104. A first flow meter 106 is fixedly installed on one side of the inside of the first connecting pipe 102. A connecting bracket 108 is fixedly installed on one side of the inside of the first connecting pipe 102. A first gear protective cover 107 is fixedly installed inside the connecting bracket 108. An adjusting knob 109 is rotatably connected to one side of the top of the first connecting pipe 102. The first connecting pipe 102 is close to the adjusting knob 109. A first sealing support 110 is fixedly installed on the outer side of the first gear. The first sealing support 110 is rotatably connected to the adjusting knob 109. An adjusting connecting shaft 111 is fixedly installed at the bottom of the adjusting knob 109. A bevel gear transmission assembly 112 is fixedly installed at the bottom of the adjusting connecting shaft 111. An adjusting threaded rod 113 is fixedly installed at one end of the bevel gear transmission assembly 112. Both the adjusting threaded rod 113 and the adjusting connecting shaft 111 are rotatably connected to the first gear protective cover 107. The adjusting threaded rod 113 is slidably connected to the adjusting piston 121. The adjusting threaded rod 113 is threadedly connected to the adjusting threaded sleeve 118 through the adjusting threaded hole 119. The parallel heat exchange tube 101 is far away from the first gear protective cover 107. A second connecting pipe 122 is rotatably connected to one end of a connecting pipe 102. A second flow meter 123 is fixedly installed on one side inside the second connecting pipe 122. A second bend 124 is fixedly installed at the end of the second connecting pipe 122. A manifold 125 is fixedly installed at the end of the second bend 124. A drain valve 126 is fixedly installed at the end of the manifold 125. The anti-corrosion spring 120 and the adjusting piston 121 are moved by adjusting the threaded sleeve 118. The flow rate is adjusted by the gap between the adjusting piston 121 and the adjusting conical groove 115 at the end of the flow regulating pipe 114, thereby controlling the flow rate. Under the monitoring of the first flow meter 106 and the second flow meter 123... By controlling the flow rate of cooling water in each parallel heat exchanger tube 101, the internal water flow rate of each parallel heat exchanger tube 101 is made approximately equal, ensuring that the cooling water in each parallel heat exchanger tube 101 can fully exchange heat with the high-temperature flue gas. This avoids insufficient heat exchange caused by insufficient flow in some parallel heat exchanger tubes 101, and the overall heat exchange efficiency can be improved by more than 15%. This ensures uniform and stable cooling effect for the flue gas. After the flow rate is evenly distributed, the flow of cooling water in each parallel heat exchanger tube 101 is smoother, and there will be no additional resistance caused by excessive flow velocity in some parallel heat exchanger tubes 101. This effectively reduces the pressure loss of the entire cooling water system and reduces the energy consumption of the circulating water pump.

[0021] Please see Figure 1 , Figures 8-9The cleaning mechanism 2 includes a heat exchanger housing 201. Support legs 202 are symmetrically installed at the bottom of the heat exchanger housing 201. An inlet valve 203 is fixedly installed on one side of the top of the heat exchanger housing 201, and an exhaust valve 204 is fixedly installed on one side of the bottom of the heat exchanger housing 201. Rotating outer disks 205 are rotatably connected to both ends of the heat exchanger housing 201. A second gear protective cover 206 is fixedly installed at the center of the outer side of one rotating outer disk 205. The rotating outer disk 205 is rotatably connected to the first connecting pipe 102 and the second connecting pipe 122, respectively. A cleaning motor 207 is fixedly installed on the bottom outer side of the second gear protective cover 206. A cleaning main gear 208 is fixedly connected to the output end of the cleaning motor 207. A cleaning gear ring 209 is meshed with the top of the cleaning main gear 208. A rotating rod 210 is fixedly installed inside the cleaning gear ring 209. Rotating gears 211 are fixedly installed at both ends of the rotating rod 210. Several meshing gears 212 are connected to the side, and a rotating inner disk 213 is rotatably connected to the inner side of the meshing gears 212. High-temperature flue gas is introduced into the interior of the heat exchanger housing 201 through the air inlet valve 203 on one side of the top of the heat exchanger housing 201. At the same time, the cleaning motor 207 is started to drive the cleaning main gear 208 to rotate. Utilizing the meshing connection between the cleaning main gear 208 and the cleaning gear ring 209, the cleaning gear ring 209 drives the rotating rod 210 and the rotating gear 211 to rotate. Utilizing the meshing connection between the rotating gear 211, the meshing gear 212, and the meshing outer ring 215, the meshing gear 212 can drive the parallel heat exchange tube 101 to rotate on its own axis, and at the same time, the meshing gear 212 can drive the rotating inner disk 213 and the parallel heat exchange tube 101 to revolve. Through the revolve of the parallel heat exchange tube 101, the cooling water inside the parallel heat exchange tube 101 can be fully mixed with the high-temperature flue gas, further improving the heat exchange efficiency of the flue gas.

[0022] Please see Figures 9-11Several cleaning spiral blades 214 are fixedly connected between the two rotating inner disks 213. The cleaning spiral blades 214 are in close contact with the inner wall of the heat exchanger shell 201. A meshing outer ring 215 is meshed with the outer side of the meshing gear 212. The parallel heat exchange tube 101 is fixedly installed inside the meshing gear 212. First centrifugal sliding rods 216 are symmetrically installed around the outer periphery of the rotating rod 210. A first centrifugal spring assembly 217 is fixedly installed at the end of the first centrifugal sliding rod 216. A first centrifugal sleeve 218 is fixedly installed on the outer side of the first centrifugal spring assembly 217. The meshing outer ring 215 is fixedly installed. A cleaning shovel 219 is fixedly installed at the end of the first centrifugal sleeve 218 inside the heat exchanger shell 201. Mounting plates 220 are fixedly installed on both sides of the bottom of the cleaning shovel 219. Several second centrifugal sleeves 221 are fixedly installed inside the mounting plates 220. A second centrifugal spring assembly 222 is fixedly installed on the bottom inner side of each second centrifugal sleeve 221. A centrifugal slider 223 is fixedly installed on the top of the second centrifugal spring assembly 222. A second centrifugal sliding rod 224 is fixedly installed on the top of the centrifugal slider 223. A cleaning plate 219 is fixedly installed on the top of the second centrifugal sliding rod 224. 25. A cleaning brush 226 is fixedly installed on the top of the cleaning plate 225. Rotating the inner disc 213 drives the cleaning spiral blade 214 to rotate, which can clean the flue gas particulate impurities adhering to the inner wall of the heat exchanger shell 201, avoiding the absorption of too many invisible flue gas particulate impurities and thus improving the heat exchange effect. At the same time, the rotating rod 210 drives the first centrifugal sliding rod 216 to rotate. Under the elastic force of the first centrifugal spring assembly 217, the first centrifugal sleeve 218 drives the cleaning shovel 219 to unfold. Through the elastic force of the second centrifugal spring assembly 222 inside the mounting plate 220, the centrifugal slider 223 drives the first centrifugal sleeve 218 to unfold the cleaning shovel 219. The centrifugal sliding rod 224 and the cleaning plate 225 move outward, causing the cleaning brush 226 to first contact the surface of the parallel heat exchange tube 101. This allows for the initial cleaning of the dust particles adsorbed on the surface of the parallel heat exchange tube 101. When a large amount of clumped particles adhere to the surface of the parallel heat exchange tube 101, the rotation speed of the rotating rod 210 is increased, and the centrifugal force is increased, causing the cleaning shovel 219 to contact the surface of the parallel heat exchange tube 101. The cleaning shovel 219 can then clean the large amount of clumped particles, further improving the heat exchange effect of the parallel heat exchange tube 101.

[0023] Working principle: Before using this type of parallel flue gas cooling heat exchanger, it is necessary to check the overall condition of the device to ensure it can operate normally. Figures 1-11As shown, firstly, flue gas cooling water is introduced into the diverter 104 via the inlet valve 105. The water is then diverted through the diverter 104 to the first bend 103 and the first connecting pipe 102. The flow rate of the cooling water entering the parallel heat exchange tube 101 is observed by the first flow meter 106 inside the first connecting pipe 102. Rotating the adjusting knob 109 drives the adjusting connecting shaft 111 and the bevel gear transmission assembly 112 to rotate. Simultaneously, the bevel gear transmission assembly 112 drives the adjusting threaded rod 113 to rotate. Utilizing the threaded connection between the adjusting threaded rod 113 and the adjusting threaded hole 119 inside the adjusting threaded sleeve 118, the adjusting threaded sleeve 118 drives the limiting slide rail 117 to slide inside the limiting bracket 116. Simultaneously, the adjusting threaded sleeve 118 drives the anti-corrosion spring 120 and the adjusting piston 121 to move. The adjusting piston 121... The gap between the regulating conical groove 115 at the end of the flow regulating pipe 114 and the water flow rate is adjusted to control the water flow rate. Under the monitoring of the first flow meter 106 and the second flow meter 123, the cooling water flow rate in each parallel heat exchange tube 101 is controlled, so that the water flow rate inside each parallel heat exchange tube 101 is approximately equal. This ensures that the cooling water in each parallel heat exchange tube 101 can fully exchange heat with the high-temperature flue gas, avoiding insufficient heat exchange caused by insufficient flow in some parallel heat exchange tubes 101. The overall heat exchange efficiency can be improved by more than 15%, ensuring uniform and stable flue gas cooling effect. After the flow rate is evenly distributed, the flow of cooling water in each parallel heat exchange tube 101 is smoother, and there will be no additional resistance caused by excessive flow velocity in some parallel heat exchange tubes 101. This effectively reduces the pressure loss of the entire cooling water system and reduces the energy consumption of the circulating water pump.

[0024] Secondly, high-temperature flue gas is introduced into the interior of the heat exchanger shell 201 through the air inlet valve 203 on one side of the top of the heat exchanger shell 201. At the same time, the cleaning motor 207 is started to drive the cleaning main gear 208 to rotate. Taking advantage of the meshing connection between the cleaning main gear 208 and the cleaning gear ring 209, the cleaning gear ring 209 drives the rotating rod 210 and the rotating gear 211 to rotate. Taking advantage of the meshing connection between the rotating gear 211, the meshing gear 212 and the meshing outer ring 215, the meshing gear 212 can drive the parallel heat exchange tube 101 to rotate on its own axis, and at the same time, the meshing gear 212 can drive the rotating inner disk 213 and the parallel heat exchange tube 101 to revolve. Through the revolve of the parallel heat exchange tube 101, the cooling water inside the parallel heat exchange tube 101 can be fully mixed with the high-temperature flue gas, further improving the heat exchange efficiency of the flue gas.

[0025] Finally, rotating the inner disc 213 drives the cleaning spiral blade 214 to rotate, which can clean the flue gas particulate impurities adhering to the inner wall of the heat exchanger shell 201, avoiding the absorption of too many invisible flue gas particulate impurities and thus improving the heat exchange effect. At the same time, rotating the rod 210 drives the first centrifugal sliding rod 216 to rotate. Under the elastic force of the first centrifugal spring assembly 217, the first centrifugal sleeve 218 drives the cleaning shovel 219 to unfold. Through the elastic force of the second centrifugal spring assembly 222 inside the mounting plate 220, the centrifugal slider 223 drives the second centrifugal sliding rod 224 and the cleaning shovel 219 to unfold. The cleaning plate 225 moves outward, allowing the cleaning brush 226 to first contact the surface of the parallel heat exchange tube 101, thus performing preliminary cleaning of the dust particles adsorbed on the surface of the parallel heat exchange tube 101. When a large amount of clumped particles adhere to the surface of the parallel heat exchange tube 101, the rotation speed of the rotating rod 210 is increased, and the centrifugal force is increased, causing the cleaning shovel 219 to contact the surface of the parallel heat exchange tube 101. The cleaning shovel 219 can then clean the large amount of clumped particles, further improving the heat exchange effect of the parallel heat exchange tube 101.

[0026] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A parallel flue gas cooling heat exchanger, comprising a flow regulating mechanism (1) and a parallel heat exchange tube (101) installed in the middle of the flow regulating mechanism (1). A cleaning mechanism (2) is provided on the outside of the flow regulating mechanism (1), and a rotating rod (210) is provided inside the cleaning mechanism (2). Its features are: The flow regulating mechanism (1) includes a flow regulating pipe (114), and an regulating conical groove (115) is provided on the inner side of the end of the flow regulating pipe (114). A limit bracket (116) is fixedly installed inside the flow regulating pipe (114). Among them, the limiting bracket (116) has several limiting slide rails (117) slidably connected inside, and the limiting slide rails (117) have an adjusting threaded sleeve (118) fixedly installed inside, and the adjusting threaded sleeve (118) has an adjusting threaded hole (119) inside. Among them, an anti-corrosion spring (120) is fixedly installed on one side of the adjusting threaded sleeve (118), and an adjusting piston (121) is fixedly connected to the end of the anti-corrosion spring (120).

2. A parallel flue gas cooling heat exchanger according to claim 1, characterized in that: One end of the parallel heat exchange tube (101) is rotatably connected to a first connecting tube (102), and a first bend (103) is fixedly installed at the end of the first connecting tube (102). A flow divider (104) is fixedly installed at the end of the first bend (103), and an inlet valve (105) is fixedly installed on the outside of the flow divider (104). A first flow meter (106) is fixedly installed on one side inside the first connecting tube (102).

3. A parallel flue gas cooling heat exchanger according to claim 2, characterized in that: A connecting bracket (108) is fixedly installed on one side of the inside of the first connecting pipe (102). A first gear protective cover (107) is fixedly installed inside the connecting bracket (108). An adjusting knob (109) is rotatably connected to the top side of the first connecting pipe (102). A first sealing support (110) is fixedly installed on the outside of the first connecting pipe (102) near the adjusting knob (109). The first sealing support (110) is rotatably connected to the adjusting knob (109).

4. A parallel flue gas cooling heat exchanger according to claim 3, characterized in that: An adjusting connecting shaft (111) is fixedly installed at the bottom of the adjusting knob (109), and a bevel gear transmission assembly (112) is fixedly installed at the bottom of the adjusting connecting shaft (111). An adjusting threaded rod (113) is fixedly installed at one end of the bevel gear transmission assembly (112). The adjusting threaded rod (113) and the adjusting connecting shaft (111) are both rotatably connected to the first gear protective cover (107). The adjusting threaded rod (113) is slidably connected to the adjusting piston (121).

5. A parallel flue gas cooling heat exchanger according to claim 4, characterized in that: The adjusting threaded rod (113) is threadedly connected to the adjusting threaded sleeve (118) through the adjusting threaded hole (119). The parallel heat exchange tube (101) is rotatably connected to the end away from the first connecting tube (102) by a second connecting tube (122). A second flow meter (123) is fixedly installed on one side inside the second connecting tube (122). A second bend (124) is fixedly installed at the end of the second connecting tube (122). A manifold (125) is fixedly installed at the end of the second bend (124). A drain valve (126) is fixedly installed at the end of the manifold (125).

6. A parallel flue gas cooling heat exchanger according to claim 5, characterized in that: The cleaning mechanism (2) includes a heat exchanger housing (201), with support legs (202) symmetrically installed at the bottom of the heat exchanger housing (201), an air inlet valve (203) fixedly installed on one side of the top of the heat exchanger housing (201), and an exhaust valve (204) fixedly installed on one side of the bottom of the heat exchanger housing (201). Rotating outer disks (205) are rotatably connected to both ends of the heat exchanger housing (201), and a second gear protective cover (206) is fixedly installed at the center of the outer side of one side of the rotating outer disk (205). The rotating outer disk (205) is rotatably connected to the first connecting pipe (102) and the second connecting pipe (122) respectively.

7. A parallel flue gas cooling heat exchanger according to claim 6, characterized in that: A cleaning motor (207) is fixedly installed on the bottom outer side of the second gear protective cover (206). A cleaning main gear (208) is fixedly connected to the output end of the cleaning motor (207). A cleaning gear ring (209) is meshed with the top of the cleaning main gear (208). A rotating rod (210) is fixedly installed inside the cleaning gear ring (209). A rotating gear (211) is fixedly installed at both ends of the rotating rod (210). Several meshing gears (212) are meshed with the outer side of the rotating gear (211).

8. A parallel flue gas cooling heat exchanger according to claim 7, characterized in that: The inner side of the meshing gear (212) is rotatably connected to a rotating inner disk (213), and a plurality of cleaning spiral blades (214) are fixedly connected between the two rotating inner disks (213). The cleaning spiral blades (214) are in close contact with the inner wall of the heat exchanger shell (201). The outer side of the meshing gear (212) is meshed with an outer ring (215). The parallel heat exchange tube (101) is fixedly installed inside the meshing gear (212). The outer side of the rotating rod (210) is symmetrically equipped with a first centrifugal sliding rod (216). The end of the first centrifugal sliding rod (216) is fixedly installed with a first centrifugal spring assembly (217). The outer side of the first centrifugal spring assembly (217) is fixedly installed with a first centrifugal sleeve (218). The outer ring (215) is fixedly installed inside the heat exchanger shell (201).

9. A parallel flue gas cooling heat exchanger according to claim 8, characterized in that: A cleaning shovel (219) is fixedly installed at the end of the first centrifugal sleeve (218). A mounting plate (220) is fixedly installed on both sides of the bottom of the cleaning shovel (219). A plurality of second centrifugal sleeves (221) are fixedly installed inside the mounting plate (220). A second centrifugal spring assembly (222) is fixedly installed on the bottom inner side of the second centrifugal sleeve (221). A centrifugal slider (223) is fixedly installed on the top of the second centrifugal spring assembly (222). A second centrifugal sliding rod (224) is fixedly installed on the top of the second centrifugal sliding rod (224). A cleaning plate (225) is fixedly installed on the top of the second centrifugal sliding rod (224). A cleaning brush (226) is fixedly installed on the top of the cleaning plate (225).

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