A steam condensation return water heat utilization device and use method thereof

Abstract

The invention discloses a steam condensation return water heat utilization device and a use method thereof, and relates to the technical field of high-temperature condensation return water heat mass utilization, comprising a return water tank, the return water tank, a water storage tank on one side of the return water tank, a preheating component between the return water tank and the water storage tank, a pressure relief component on the side of the return water tank, an upper adapter on the middle of the return water tank, a return pipe on the top of the upper adapter, and an output pipe on the end of the return pipe away from the return water tank. The invention can utilize high-temperature condensation return water to circulate and heat raw water at room temperature, effectively meet the water replenishment demand of the boiler, and reduce the generation of scale at the same time, and can perform secondary heating on the cooled condensation return water, and save energy at the same time, and can filter the high-temperature condensation return water to remove impurities, and in addition, when the filter component is blocked, it can be cleared in time to prevent affecting the filtering effect, and the dirt attached to the filter component can be effectively removed.

Description

Technical Field

[0001] The present invention relates to the technical field of high-temperature condensation return water heat mass utilization, and in particular to a steam condensation return water heat utilization device and a use method thereof. Background Art

[0002] Industrial boilers are important thermal power equipment, widely used in chemical, petroleum, textile, printing and dyeing, papermaking, food, restaurants, hospitals, schools, power and energy fields, and are also widely used in the manufacture of corrugated paper. A considerable part of the use of industrial boiler steam is used for indirect heating. The temperature of the high-temperature condensate return water generated after indirect heating can reach above 100°C. The high-temperature condensate return water after leaving the heat-using equipment still contains about 25% of the steam heat, which is a considerable waste heat resource.

[0003] The patent document with the publication number CN213207822U discloses a closed high-temperature condensate return water recovery system. The high-temperature steam generated by the boiler is transmitted through the steam delivery pipeline → heat equipment in the production workshop → condensate return pipe → condensate water recovery device → high-temperature water pump → boiler, forming a closed cycle. The system has a high recovery rate of condensate return water and obvious energy-saving effect. The 100℃ high-temperature condensate water is directly delivered to the boiler through the high-temperature water pump, forming another water supply system outside the normal boiler water supply system. The secondary flash steam generated by the condensate water after expansion and pressure reduction enters the thermal deaerator in the boiler room as the primary heat source for thermal deaeration, further improving the recovery rate. However, due to the limited amount of high-temperature condensate return water generated, it cannot meet the boiler water replenishment needs, and it is still necessary to add more room temperature raw water to the boiler for water replenishment.

[0004] Moreover, high-temperature condensate return water contains more impurities. When it is directly added to the boiler for use, more dirt will be formed in the boiler. When raw water is added to the boiler for replenishment, more scale will be generated in the boiler, affecting the normal use of the boiler. In addition, when some existing technologies filter high-temperature condensate return water, impurities will cause clogging of the filter components, affecting the filtration effect, and it is inconvenient to clear the blockage. Moreover, more scale is easily generated on the filter components, which is inconvenient to clean. Therefore, it is necessary to invent a steam condensate return water heat utilization device and a method of using the same to solve the above problems. Summary of the invention

[0005] The purpose of the present invention is to provide a steam condensation return water heat utilization device and a method of using the same, which can utilize high-temperature condensation return water to circulate and heat raw water at room temperature, effectively meet the water replenishment demand of the boiler, and reduce the generation of scale. The cooled condensation return water can be heated up again, saving energy at the same time, and the high-temperature condensation return water can be filtered to remove impurities. In addition, when the filter component is blocked, it can be cleared in time to prevent affecting the filtering effect, and the dirt attached to the filter component can be effectively removed to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a steam condensation return water heat utilization device, comprising a return water tank, the return water tank, a water storage tank is provided on one side of the return water tank, a preheating component is provided between the return water tank and the water storage tank, and a pressure relief component is provided on the side of the return water tank;

[0007] An upper adapter is provided in the middle of the return water tank, a return pipe is provided on the top of the upper adapter, an output pipe is provided at the end of the return pipe away from the return water tank, a lower adapter is provided at the bottom of the side of the return water tank, the end of the lower adapter is connected to a first water pump, and an input pipe is provided at the output end of the first water pump;

[0008] A water inlet pipe is provided in the middle of the top surface of the water storage tank, a water supply pipe is provided on the upper middle side of the water inlet pipe, a second water pump is provided at the bottom of the side of the water storage tank, and a water outlet pipe is provided at the output port of the second water pump;

[0009] The preheating assembly comprises a preheating box, wherein heat conducting pipes are horizontally arranged at equal intervals in the vertical direction inside the preheating box, and water inlet side pipes and water discharge side pipes are respectively arranged on both sides of the outer side of the preheating box, and heat conducting plates are symmetrically arranged on the upper and lower sides of each heat conducting pipe, and the side of the heat conducting plate is slidably connected to the inner wall of the preheating box, and flow guide holes are evenly opened on the side of the heat conducting plate, and metal plates are symmetrically arranged at both ends of the heat conducting plate located on one side of the heat conducting pipe, and electromagnets are symmetrically arranged at both ends of the heat conducting plate located on the other side of the heat conducting pipe, and rubber tubes are respectively arranged between the two sides of the heat conducting pipe and the heat conducting plates on both sides;

[0010] The pressure relief assembly comprises a pressure relief pipe, an air guide pipe is arranged at the top of the pressure relief pipe, a pressure relief valve is arranged at the inner top of the pressure relief pipe, and an elastic bag is arranged at the bottom of the pressure relief valve.

[0011] Preferably, a first liquid level gauge is provided on one side of the top of the return water tank, a return water pipe connected to a storage container of external condensed return water is provided on the side of the upper adapter, a return water valve is provided on the return water pipe, a first electric valve is provided on the return pipe, a flow meter is provided on the return pipe, and a first temperature sensor is provided on the bottom of the side of the return water tank.

[0012] Preferably, a water supply pipe is provided on one side of the top of the water storage tank, a valve is provided on the water supply pipe, a water injection pipe is provided on the top of the water storage tank, a second liquid level gauge is provided on the other side of the top of the water storage tank, and a second temperature sensor is provided at the bottom of the side of the water storage tank.

[0013] Preferably, a second electric valve is provided in the middle of the water supply pipe, one end of the water supply pipe away from the water inlet pipe is connected to the middle top side of the output pipe, and a third electric valve is provided at the end of the water inlet pipe near the water supply pipe.

[0014] Preferably, the heat conduction pipe is arranged in an "S" shape, the water inlet side pipe is connected to the input port of each heat conduction pipe in the vertical direction, and the water discharge side pipe is connected to the output port of each heat conduction pipe in the vertical direction.

[0015] Preferably, a groove is provided on the side of the heat conducting plate, and the groove corresponds to the heat conducting pipe. A guide block is provided in the middle of the guide hole, and guide grooves are symmetrically provided on both sides of the guide block.

[0016] Preferably, the end of the rubber tube is connected to the heat conduction tube, an air intake pipe is provided on the side of the top connecting pipe of the preheating box, an air intake valve is provided on the air intake pipe, and a sealing door is detachably connected to the side of the preheating box.

[0017] Preferably, the end of the top connecting pipe of the preheating box is connected to the end of the output pipe away from the return pipe, the end of the bottom connecting pipe of the preheating box is connected to the end of the input pipe, the bottom end of the water inlet side pipe is connected to the end of the water outlet pipe, and the top of the drainage side pipe is connected to the end of the water inlet pipe away from the water storage tank.

[0018] Preferably, the air guide pipe passes through the top of the side of the return water tank, a solenoid valve is provided at one end of the air guide pipe located inside the return water tank, an exhaust pipe is provided at the top of the pressure relief pipe, and the end of the exhaust pipe is connected to the end of the intake pipe.

[0019] A method for using a steam condensation return water heat utilization device comprises the following steps:

[0020] S1. Inject high-temperature condensed return water from an external high-temperature condensed return water storage container into the return water tank for storage, and inject normal-temperature water into the water storage tank for storage;

[0021] S2, injecting the normal temperature water in the water storage tank into the heat transfer pipe in the preheating box through the water outlet pipe and the water inlet side pipe, and returning to the water storage tank through the drainage side pipe and the water inlet pipe;

[0022] S3, extracting the high-temperature condensed return water in the return water tank and inputting it into the preheating box, and returning it to the return water tank through the output pipe and the return pipe, heating the normal-temperature water flowing in the heat transfer pipe, and cooling the high-temperature condensed return water in the return water tank;

[0023] S4, after the normal temperature water in the water storage tank is heated to the specified temperature, water is added to the external boiler. After the water is added, normal temperature water is added to the water storage tank and the water in the return water tank is added to the water storage tank, and then high temperature condensed return water is added to the return water tank;

[0024] S5. When the heat transfer plate is blocked, the drainage side pipe is closed, the second water pump works alternately forward and reverse, the rubber tube is elastically stretched, and the heat transfer plates on both sides of the heat transfer pipe are separated from each other. When the second water pump works in the reverse direction, the rubber tube drives the heat transfer plate to shrink and reset, realizing high-frequency reciprocating motion of the heat transfer plate, and shaking off the impurities blocked in the diversion hole;

[0025] S6. When there is a lot of scale on the heat transfer plate, heat the water in the water storage tank and repeat the above steps. At this time, due to the high temperature of the water entering the heat transfer tube, the rubber tube drives the heat transfer plate to further extend, and the heat transfer plates between two adjacent heat transfer tubes collide, breaking and falling off the scale attached to the heat transfer plate.

[0026] Technical effects and advantages of the present invention:

[0027] 1. The present invention can pass the normal temperature water in the water storage tank into the heat conduction pipe and return it to the water storage tank, and then use the high temperature condensed return water in the return water tank to enter the preheating box and return it to the return water tank. The high temperature condensed return water can be used to heat the normal temperature water circulating in the heat conduction pipe, so as to preheat the water to be added to the boiler, save energy, improve environmental protection effects, and realize the reuse of high temperature condensed return water. The high temperature condensed return water can be filtered by the heat conduction plate to remove impurities.

[0028] 2. When the flow guide hole is clogged with a lot of impurities, the present invention stops the circulating heating of the normal temperature water in the water storage tank, makes the preheating box hollow, and then makes the second water pump work alternately in the forward and reverse directions to achieve alternating drainage and pumping into the water inlet side pipe, and at the same time stops the electromagnet from working and no longer adsorbs the metal plate. When the second water pump works in the forward direction, the rubber tube is stretched and pushes the heat conduction plates on both sides to move in the directions away from the two sides of the heat conduction pipe respectively. When the second water pump rotates in the reverse direction, the stretched rubber tube contracts under the action of negative pressure and drives the heat conduction plates on both sides of the heat conduction pipe to close quickly. The high-frequency forward and reverse alternating work of the second water pump is used to achieve high-frequency reciprocating vibration of the heat conduction plate, so as to shake off the impurities attached to the flow guide hole.

[0029] 3. The present invention can close the second electric valve and the first electric valve, open the air intake valve intermittently, and open the air intake valve when the heat conduction plate moves to the side away from the heat conduction tube during the high-frequency reciprocating vibration of the heat conduction plate. The expanded elastic bag contracts, and the high-pressure gas in the elastic bag is discharged into the top of the preheating box. The high-pressure airflow impacts the heat conduction plate in opposite directions. The intermittent opening of the air intake valve is used to achieve intermittent impact on the guide hole, so that the impurities tightly adhered in the guide hole are impacted and fall off by the high-pressure gas, thereby achieving complete unblocking of the heat conduction plate.

[0030] 4. When a large amount of scale stains are condensed on the heat conducting plate, the present invention can first circulate and heat the water in the water storage tank, and repeat the action of clearing the blockage. Since the temperature of the water in the heat conducting pipe is relatively high at this time, the ductility of the rubber pipe is improved, and the water pressure in the heat conducting pipe causes the rubber pipe to be further elastically stretched. When the heat conducting plates on both sides of the heat conducting pipe move away from each other, the heat conducting plates between two adjacent heat conducting pipes collide, so that the dirt attached to the surface of the heat conducting plate is shattered and falls off, thereby removing the dirt on the surface of the heat conducting plate. When the second water pump works in the reverse direction, the opposite sides of the heat conducting plates on both sides of the same heat conducting pipe collide, thereby realizing secondary vibration removal of scale stains on the heat conducting plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0032] Figure 2 It is a schematic diagram of the internal structure of the preheating box of the present invention.

[0033] Figure 3 It is a schematic diagram of the structure of the preheating component of the present invention.

[0034] Figure 4 It is a schematic diagram of the structure of the heat conducting pipe and the heat conducting plate of the present invention.

[0035] Figure 5 For the present invention Figure 4 Enlarged structural diagram at A in the middle.

[0036] Figure 6 It is a schematic diagram of the structure of the preheating box of the present invention.

[0037] Figure 7 It is a schematic diagram of the cross-sectional structure of the pressure relief pipe of the present invention.

[0038] In the figure: 1. water return tank; 101. first liquid level gauge; 102. upper adapter; 103. water return pipe; 104. water return valve; 105. return pipe; 106. first electric valve; 107. output pipe; 108. lower adapter; 109. first water pump; 110. input pipe; 111. flow meter; 112. first temperature sensor; 2. water storage tank; 201. water supply pipe; 202. valve; 203. water injection pipe; 204. second liquid level gauge; 205. water inlet pipe; 206. water supply pipe; 207. second electric valve; 208. third electric valve; 209. water outlet pipe; 21 0. Second water pump; 211. Second temperature sensor; 3. Preheating assembly; 301. Preheating box; 302. Heat pipe; 303. Water inlet side pipe; 304. Drain side pipe; 305. Heat conduction plate; 306. Groove; 307. Guide hole; 308. Guide block; 309. Guide groove; 310. Metal plate; 311. Electromagnet; 312. Rubber tube; 313. Intake pipe; 314. Intake valve; 315. Sealing door; 4. Pressure relief assembly; 401. Pressure relief pipe; 402. Air guide pipe; 403. Solenoid valve; 404. Pressure relief valve; 405. Elastic bag; 406. Exhaust pipe. DETAILED DESCRIPTION

[0039] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0040] First embodiment

[0041] like Figure 1-6 As shown, the present invention provides a steam condensation return water heat utilization device, including a return water tank 1, a return water tank 1, a water storage tank 2 is provided on one side of the return water tank 1, a preheating component 3 is provided between the return water tank 1 and the water storage tank 2, and a pressure relief component 4 is provided on the side of the return water tank 1.

[0042] A first liquid level gauge 101 is provided on one side of the top of the return water tank 1, and a first temperature sensor 112 is provided on the bottom of the side of the return water tank 1. Specifically, the first liquid level gauge 101 is used to monitor the liquid level of the condensed return water in the return water tank 1, and the first temperature sensor 112 is used to monitor the temperature of the condensed return water in the return water tank 1.

[0043] An upper adapter 102 is provided in the middle of the return water tank 1, and a return water pipe 103 connected to an external condensed return water storage container is provided on the side of the upper adapter 102. A return water valve 104 is provided on the return water pipe 103. Specifically, the return water pipe 103 can replenish condensed return water into the return water tank 1 by being connected to an external condensed return water container, and the return water valve 104 is in an open state when replenishing condensed return water, and is evenly closed at other times.

[0044] A return pipe 105 is provided on the top of the upper adapter 102, a flow meter 111 is provided on the return pipe 105, a first electric valve 106 is provided on the return pipe 105, an output pipe 107 is provided at the end of the return pipe 105 away from the return water tank 1, a lower adapter 108 is provided at the bottom of the side of the return water tank 1, the end of the lower adapter 108 is connected to the first water pump 109, and an input pipe 110 is provided at the output end of the first water pump 109. Specifically, the flow meter 111 is used to monitor the amount of condensed return water passing through the return pipe 105, and the first water pump 109 is used to extract the condensed return water in the return water tank 1 and send it into the preheating box 301.

[0045] A water supply pipe 201 is provided on one side of the top of the water tank 2, a valve 202 is provided on the water supply pipe 201, a water injection pipe 203 is provided on the top of the water tank 2, a second liquid level gauge 204 is provided on the other side of the top of the water tank 2, and a second temperature sensor 211 is provided on the bottom of the side of the water tank 2. Specifically, the water supply pipe 201 is used to replenish the heated water in the water tank 2 into the boiler, the valve 202 is used to switch the opening and closing between the water supply pipe 201 and the water injection pipe 203, and the water injection pipe 203 is used to add normal temperature water to the water tank 2.

[0046] A water inlet pipe 205 is provided in the middle of the top surface of the water storage tank 2, a water replenishment pipe 206 is provided on the upper middle side of the water inlet pipe 205, a second electric valve 207 is provided in the middle of the water replenishment pipe 206, one end of the water replenishment pipe 206 away from the water inlet pipe 205 is connected to the middle top side of the output pipe 107, a third electric valve 208 is provided at the end of the water inlet pipe 205 near the water replenishment pipe 206, a second water pump 210 is provided at the bottom of the side of the water storage tank 2, and a water outlet pipe 209 is provided at the output port of the second water pump 210. Specifically, the water replenishment pipe 206 is used to replenish the condensed return water in the return water tank 1 that has been cooled into the water storage tank 2 for secondary heating, and the second water pump 210 is used to provide power for the circulation of normal temperature water.

[0047] The preheating assembly 3 includes a preheating box 301, inside of which heat pipes 302 are horizontally arranged at equal intervals along the vertical direction, and the heat pipes 302 are arranged in an "S" shape. Water inlet side pipes 303 and water discharge side pipes 304 are respectively arranged on both sides of the outer side of the preheating box 301. The water inlet side pipe 303 is connected to the input port of each heat conduction pipe 302 in the vertical direction, and the water discharge side pipe 304 is connected to the output port of each heat conduction pipe 302 in the vertical direction. The bottom end of the water inlet side pipe 303 is connected to the end of the water outlet pipe 209, and the top of the water discharge side pipe 304 is connected to the end of the water inlet pipe 205 away from the water storage tank 2. Specifically, the second water pump 210 pumps water out of the water storage tank 2 and discharges it into the water side pipe 303 through the water outlet pipe 209, and then enters each heat conduction pipe 302 in the preheating box 301, and is discharged through the water discharge side pipe 304 and flows back to the water storage tank 2 through the water inlet pipe 205.

[0048] The end of the top connecting pipe of the preheating box 301 is connected to the end of the output pipe 107 away from the return pipe 105, and the end of the bottom connecting pipe of the preheating box 301 is connected to the end of the input pipe 110. Specifically, the first water pump 109 sends the water pumped out of the return water tank 1 into the preheating box 301 through the input pipe 110, and returns to the return water tank 1 through the output pipe 107 and the return pipe 105.

[0049] Heat conducting plates 305 are symmetrically provided on the upper and lower sides of each heat conducting tube 302. The sides of the heat conducting plates 305 are slidably connected to the inner wall of the preheating box 301. A groove 306 is provided on the side of the heat conducting plate 305. The groove 306 corresponds to the heat conducting tube 302. Guide holes 307 are evenly provided on the side of the heat conducting plate 305. A guide block 308 is provided in the middle of the guide hole 307. Guide grooves 309 are symmetrically provided on both sides of the guide block 308. Specifically, the temperature of the high-temperature condensed return water in the preheating box 301 can heat the heat conducting plate 305, and the heat conducting plate 305 is used to slow down the flow rate of the high-temperature condensed return water, so that the normal temperature water in the heat conducting tube 302 is fully heated.

[0050] The pressure relief assembly 4 includes a pressure relief pipe 401, an air guide pipe 402 is provided at the top of the pressure relief pipe 401, a pressure relief valve 404 is provided at the inner top of the pressure relief pipe 401, and the air guide pipe 402 passes through the side top of the return water tank 1. Specifically, when high-temperature condensed water is added to the return water tank 1, since the return water tank 1 is in a closed state, the air pressure in the return water tank 1 will increase. When the threshold value set by the pressure relief valve 404 is reached, the pressure relief valve 404 opens to relieve pressure.

[0051] When the device of this embodiment is in use, especially when it is used for the first time, high-temperature condensed return water is injected from the external high-temperature condensed return water storage container into the return water tank 1 through the return water pipe 103 for storage. At the same time, normal temperature water is injected into the water storage tank 2 through the water injection pipe 203 for storage. When high-temperature condensed water is added to the return water tank 1, since the return water tank 1 is in a closed state, the air pressure in the return water tank 1 increases, and is passed into the pressure relief pipe 401 through the air guide pipe 402. When the set threshold of the pressure relief valve 404 is reached, the pressure relief valve 404 opens and the pressure is relieved through the bottom of the pressure relief pipe 401.

[0052] Secondly, start the second water pump 210, and inject the normal temperature water in the water storage tank 2 into the heat transfer pipe 302 in the preheating box 301 through the outlet pipe 209 and the water inlet side pipe 303, and return to the water storage tank 2 through the drain side pipe 304 and the water inlet pipe 205. During this process, the second electric valve 207 is closed and the third electric valve 208 is opened.

[0053] Then, the first water pump 109 is started to extract the high-temperature condensed return water in the return water tank 1 and input it into the preheating box 301 through the input pipe 110, and passes through each heat conducting pipe 302 and the heat conducting plate 305 from bottom to top in sequence through the guide hole 307. The high-temperature condensed return water is used to heat the normal-temperature water circulating in the heat conducting pipe 302, and the heat conducting plate 305 is used to slow down the flow of the high-temperature condensed water so that the normal-temperature water in the heat conducting pipe 302 is fully heated. At the same time, the guide hole 307 and the guide block 308 are used to filter the high-temperature condensed water to remove impurities in the high-temperature condensed water. The high-temperature condensed water passes through the top of the preheating box 301 and flows back to the return water tank 1 through the output pipe 107 and the return pipe 105. At the same time, the temperature of the high-temperature condensed return water flowing back to the return water tank 1 is reduced. In this process, the first electric valve 106 is opened.

[0054] The second temperature sensor 211 detects that the room temperature water in the water tank 2 is heated to the set threshold value, so that the valve 202 is opened, the external pump body is started, and the room temperature water heated in the water tank 2 is injected into the boiler through the water supply pipe 201 for water replenishment. After the water replenishment is completed, the room temperature water is added to the water tank 2 to half of the volume of the water tank 2, and then the first water pump 109 is started to extract the cooled water in the return water tank 1 and inject it into the water tank 2 through the preheating box 301, the output pipe 107, the water replenishment pipe 206 and the water inlet pipe 205. In this process, the first electric valve 106 is closed and the first electric valve 106 is closed. The second electric valve 207 is opened, and the third electric valve 208 is closed. After all the water in the return water tank 1 is added to the water storage tank 2, the return water valve 104 is opened, and high-temperature condensed return water continues to be injected into the return water tank 1 from the external high-temperature condensed return water storage container, and the water in the water storage tank 2 is heated again through the above circulation steps, so that the high-temperature condensed return water can be used to preheat the water to be added to the boiler, saving energy, improving environmental protection effects, and realizing the reuse of high-temperature condensed return water. The high-temperature condensed return water can also be filtered to remove impurities to prevent impurities from entering the boiler.

[0055] Second embodiment

[0056] like Figure 1-7 As shown, based on a steam condensation return water heat utilization device provided in the first embodiment, in actual use, especially when the high-temperature condensation return water enters the preheating box 301, impurities accumulate more and more in the preheating box 301, which will lead to the blockage of the guide hole 307, affecting the fluidity of the high-temperature condensation return water, and further affecting the heating effect of the normal temperature water in the heat pipe 302. Moreover, after long-term use, more scale stains will condense on the surface of the heat conduction plate 305, affecting the heat conduction effect of the heat conduction plate 305, and further affecting the heating effect of the normal temperature water in the heat conduction pipe 302. In order to solve the above problems:

[0057] An air intake pipe 313 is provided on the side of the top connecting pipe of the preheating box 301, and an air intake valve 314 is provided on the air intake pipe 313. A sealing door 315 is detachably connected to the side of the preheating box 301. Specifically, the connection between the air intake pipe 313 and the exhaust pipe 406 can realize the connection between the top of the preheating box 301 and the pressure relief pipe 401. The sealing door 315 can be conveniently discharged after the scale stains and blockages on the heat conduction plate 305 are cleaned.

[0058] Metal plates 310 are symmetrically provided at both ends of the heat conducting plate 305 located on one side of the heat conducting pipe 302, and electromagnets 311 are symmetrically provided at both ends of the heat conducting plate 305 located on the other side of the heat conducting pipe 302. Rubber tubes 312 are respectively provided between the two sides of the heat conducting pipe 302 and the heat conducting plates 305 on both sides, and the ends of the rubber tubes 312 are connected to the heat conducting pipe 302. Specifically, in the initial state, the electromagnet 311 is in the starting state, and the magnetic attraction of the electromagnet 311 can be used to adsorb the metal plate 310, so as to realize the suction and fixation between the heat conducting plates 305 on both sides. The rubber tube 312 is connected to the heat conducting pipe 302, and when pressurized water enters the rubber tube 312 through the heat conducting pipe 302, the rubber tube 312 can be stretched, and the heat conducting plates 305 on both sides can be separated at the same time.

[0059] An electromagnetic valve 403 is provided at one end of the air guide pipe 402 located inside the return water tank 1, an elastic bag 405 is provided at the bottom of the pressure relief valve 404, and an exhaust pipe 406 is provided at the top of the pressure relief pipe 401. Specifically, by closing the air intake valve 314 and opening the electromagnetic valve 403, when high-temperature condensed return water is added to the return water tank 1, the elastic bag 405 can expand downward through the air guide pipe 402 and the pressure relief valve 404.

[0060] When this embodiment is in use, during the process of adding high-temperature condensed return water into the return water tank 1, the solenoid valve 403 is opened and the air inlet valve 314 is closed. As more and more high-temperature condensed return water is added, the pressure relief valve 404 is opened to allow the elastic bag 405 to expand downward to relieve pressure. After the high-temperature condensed water is injected, the solenoid valve 403 is closed, so that the elastic bag 405 can remain in an expanded state.

[0061] In the normal process of preheating the normal temperature water in the water storage tank 2, the first electric valve 106 and the third electric valve 208 are opened, the return valve 104, the second electric valve 207 and the air inlet valve 314 are closed, and when there are many impurities in the guide hole 307 of the heat conduction plate 305, the resistance of the condensed return water passing through the preheating box 301 is increased, and then in the process of returning to the return water tank 1 through the output pipe 107, the liquid flow through the return pipe 105 will be reduced. Therefore, when the flow meter 111 detects that the liquid flows through When the flow value of the condensed return water in the return pipe 105 is less than the set threshold, it is actively determined that there are more impurities blocking the diversion hole 307. At this time, the circulation heating of the normal temperature water in the water storage tank 2 is stopped, and the first water pump 109 is reversed to reversely pump the high-temperature condensed return water remaining in the preheating box 301, the output pipe 107 and the return pipe 105 back to the return water tank 1, and then the first electric valve 106 is closed. At this time, the preheating box 301 is in a hollow state, and then the third electric valve 208 is closed. The second water pump 210 works alternately in the forward and reverse directions, thereby realizing alternate drainage and pumping of water into the water inlet pipe 303, and at the same time, the electromagnet 311 stops working and no longer adsorbs the metal plate 310. When the second water pump 210 works in the forward direction, high-pressure water is discharged into the water inlet pipe 303. Due to the closure of the third electric valve 208, the water in the heat conduction pipe 302 is discharged into the rubber tubes 312 on both sides. The rubber tubes 312 are stretched, and at the same time, the heat conduction plates 305 on both sides of the heat conduction pipe 302 are pushed away from the heat conduction pipe 302. The heat pipe 302 moves in opposite directions on both sides. When the second water pump 210 rotates in the opposite direction, the water in the heat pipe 302 is discharged through the water outlet pipe 209. At the same time, the heat pipe 302 is in a negative pressure state. The stretched rubber tube 312 shrinks under the action of the negative pressure, and at the same time drives the heat conducting plates 305 on both sides of the heat conducting pipe 302 to close quickly. Then, the high-frequency forward and reverse alternating operation of the second water pump 210 is used to achieve high-frequency reciprocating vibration of the heat conducting plates 305, so that impurities attached to the guide holes 307 can be shaken off.

[0062] However, some impurities are tightly attached in the flow guide hole 307, and the vibration of the heat conducting plate 305 cannot make some tightly adhered impurities fall off. Therefore, during the high-frequency reciprocating vibration of the heat conducting plate 305, the second electric valve 207 and the first electric valve 106 are closed, and the air intake valve 314 is opened intermittently. In the process that the heat conducting plate 305 moves to the side away from the heat conducting pipe 302, the air intake valve 314 is opened. When the air intake valve 314 is opened, the expanded elastic bag 405 contracts, and the high-pressure gas in the elastic bag 405 is discharged from top to bottom into the preheating box 301 through the exhaust pipe 406 and the air intake pipe 313, so that the high-pressure airflow impacts the heat conducting plate 305 in the opposite direction, and the intermittent opening of the air intake valve 314 is used to achieve intermittent impact on the flow guide hole 307, so that the impurities tightly adhered in the flow guide hole 307 are impacted and fall off, and the heat conducting plate 305 is completely cleared.

[0063] In addition, during long-term use, more scale stains will condense on the surface of the heat conducting plate 305, affecting the heat conducting effect of the heat conducting plate 305, and further affecting the heating effect of the normal temperature water in the heat conducting pipe 302. During the process of circulating and heating the water in the water storage tank 2, when the second temperature sensor 211 detects that the temperature increase rate in the water storage tank 2 is less than the set threshold, it is actively determined that more scale stains are condensed on the heat conducting plate 305. At this time, the water in the water storage tank 2 is first circulated and heated to make the temperature of the water in the water storage tank 2 reach the second temperature sensor 211. The threshold value set by the temperature sensor 211 is set. At this time, when the first electric valve 106 is opened again, the high-temperature condensed return water remaining in the preheating box 301, the output pipe 107 and the return pipe 105 is reversely pumped back to the return water tank 1, and the electromagnet 311 is turned off, and the second water pump 210 is again made to work alternately in the forward and reverse directions, so as to realize the alternating drainage and pumping into the water inlet side pipe 303, so that the heat conducting plates 305 on both sides of the heat conducting pipe 302 reciprocate. It should be noted that the temperature of the water in the heat conducting pipe 302 is relatively high at this time, so The rubber tube 312 becomes soft and its ductility increases. The water pressure in the heat conducting tube 302 causes the rubber tube 312 to be further elastically stretched, so that the stretched length of the rubber tube 312 becomes longer. Then, during the reciprocating motion of the heat conducting plates 305 on both sides of the heat conducting tube 302, especially when the heat conducting plates 305 on both sides of the heat conducting tube 302 move away from each other, the heat conducting plates 305 between two adjacent heat conducting tubes 302 will collide, so that the dirt attached to the surface of the heat conducting plates 305 is broken and falls off, thereby achieving the cleaning of the dirt on the surface of the heat conducting plates 305. In addition, when the second water pump 210 works in the reverse direction, the elastically stretched rubber tube 312 is quickly contracted, causing the opposite sides of the heat-conducting plates 305 on both sides of the same heat-conducting tube 302 to collide, thereby achieving secondary vibration cleaning of scale stains on the heat-conducting plates 305, and by heating the water in the water storage tank 2 to different temperatures, the rubber tube 312 can be softened to different degrees, so that the rubber tube 312 has different ductility, thereby achieving different degrees of collision between the heat-conducting plates 305, achieving different degrees of cleaning effects on scale stains.

[0064] It should be noted that after the flow guide hole 307 is unblocked and the scale stains on the surface of the heat conduction plate 305 are cleaned, the sealing door 315 is removed, the air intake valve 314, the second electric valve 207 and the first electric valve 106 are closed, the return valve 104 is opened, and the first water pump 109 is started to pump the water in the return tank 1 into the preheating box 301, so that the impurities and scale stains cleaned on the heat conduction plate 305 can be flushed out from one side of the preheating box 301.

[0065] Third embodiment

[0066] This embodiment provides a method for using a steam condensation return water heat utilization device, comprising the following steps:

[0067] S1, injecting high-temperature condensed return water from an external high-temperature condensed return water storage container into the return water tank 1 for storage, and injecting normal-temperature water into the water storage tank 2 for storage;

[0068] S2, start the second water pump 210, inject the room temperature water in the water storage tank 2 into the heat transfer pipe 302 in the preheating box 301 through the water outlet pipe 209 and the water inlet pipe 303, and return to the water storage tank 2 through the water outlet pipe 304 and the water inlet pipe 205;

[0069] S3, start the first water pump 109 to pump out the high-temperature condensed return water in the return water tank 1 and input it into the preheating box 301 through the input pipe 110, and return it to the return water tank 1 through the output pipe 107 and the return pipe 105, while the normal temperature water circulating in the heat transfer pipe 302 is heated and the high-temperature condensed return water in the return water tank 1 is cooled;

[0070] S4, after the normal temperature water in the water storage tank 2 is heated to the specified temperature, water is replenished into the external boiler. After the replenishment is completed, normal temperature water is replenished into the water storage tank 2 to one half of the volume of the water storage tank 2. Then, the first water pump 109 is started to replenish all the cooled water in the return water tank 1 into the water storage tank 2, and then the high temperature condensed return water is replenished into the return water tank 1 from the external high temperature condensed return water storage container;

[0071] S5. When the heat conducting plate 305 is blocked, the drainage side pipe 304 is closed, and the second water pump 210 works alternately in forward and reverse directions. When the second water pump 210 works in the forward direction, the water in the water storage tank 2 is input into the heat conducting pipe 302. At the same time, the electromagnet 311 is turned off, and the water in the heat conducting pipe 302 enters the rubber tube 312. The rubber tube 312 is elastically stretched, and the heat conducting plates 305 on both sides of the heat conducting pipe 302 are separated from each other. When the second water pump 210 works in the reverse direction, the rubber tube 312 drives the heat conducting plate 305 to shrink and reset, so as to realize high-frequency reciprocating motion of the heat conducting plate 305, and shake off the impurities blocked in the flow guide hole 307;

[0072] S6. When there is a lot of scale on the heat conducting plate 305, the drainage side pipe 304 is closed, and the water in the water storage tank 2 is heated and heated, and the preheating box 301 is in a hollow state, and the second water pump 210 is operated alternately forward and reverse again, and the electromagnet 311 is turned off at the same time. At this time, due to the high temperature of the water entering the heat conducting pipe 302, the ductility of the rubber tube 312 increases, and the rubber tube 312 can drive the heat conducting plate 305 to further extend. At this time, the heat conducting plates 305 between the two adjacent heat conducting pipes 302 collide, and the scale attached to the heat conducting plate 305 can be broken and fallen off.

[0073] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A steam condensation return water heat utilization device, characterized in that: It comprises a return water tank, a water storage tank is arranged on one side of the return water tank, a preheating component is arranged between the return water tank and the water storage tank, and a pressure relief component is arranged on the side of the return water tank; An upper adapter is provided in the middle of the return water tank, a return pipe is provided on the top of the upper adapter, an output pipe is provided at the end of the return pipe away from the return water tank, a lower adapter is provided at the bottom of the side of the return water tank, the end of the lower adapter is connected to a first water pump, and an input pipe is provided at the output end of the first water pump; A water inlet pipe is provided in the middle of the top surface of the water storage tank, a water supply pipe is provided on the upper middle side of the water inlet pipe, a second water pump is provided at the bottom of the side of the water storage tank, and a water outlet pipe is provided at the output port of the second water pump; The preheating assembly comprises a preheating box, wherein heat conducting pipes are horizontally arranged at equal intervals in the vertical direction inside the preheating box, and water inlet side pipes and water discharge side pipes are respectively arranged on both sides of the outer side of the preheating box, and heat conducting plates are symmetrically arranged on the upper and lower sides of each heat conducting pipe, and flow guide holes are evenly opened on the sides of the heat conducting plates, and metal plates are symmetrically arranged on both ends of the heat conducting plate located on one side of the heat conducting pipe, and electromagnets are symmetrically arranged on both ends of the heat conducting plate located on the other side of the heat conducting pipe, and rubber tubes are respectively arranged between the two sides of the heat conducting pipe and the heat conducting plates on both sides; The pressure relief assembly comprises a pressure relief pipe, an air guide pipe is arranged at the top of the pressure relief pipe, a pressure relief valve is arranged at the inner top of the pressure relief pipe, and an elastic bag is arranged at the bottom of the pressure relief valve; A second electric valve is provided in the middle of the water supply pipe, one end of the water supply pipe away from the water inlet pipe is connected to the middle top side of the output pipe, and a third electric valve is provided at the end of the water inlet pipe near the water supply pipe; The side of the heat conducting plate is slidably connected to the inner wall of the preheating box, a groove is provided on the side of the heat conducting plate, and the groove is correspondingly matched with the heat conducting pipe, a guide block is provided in the middle of the guide hole, and guide grooves are symmetrically provided on both sides of the guide block; The end of the rubber tube is connected to the heat conduction tube, an air intake pipe is arranged on the side of the top connecting pipe of the preheating box, an air intake valve is arranged on the air intake pipe, and a sealing door is detachably connected to the side of the preheating box.

2. A steam condensation return water heat utilization device according to claim 1, characterized in that: A first liquid level gauge is provided on one side of the top of the return water tank, a return water pipe connected to a storage container of external condensed return water is provided on the side of the upper adapter, a return water valve is provided on the return water pipe, a first electric valve is provided on the return pipe, a flow meter is provided on the return pipe, and a first temperature sensor is provided on the bottom of the side of the return water tank.

3. The steam condensation return water heat utilization device according to claim 1, characterized in that: A water supply pipe is provided on one side of the top of the water storage tank, a valve is provided on the water supply pipe, a water injection pipe is provided on the top of the water storage tank, a second liquid level gauge is provided on the other side of the top of the water storage tank, and a second temperature sensor is provided at the bottom of the side of the water storage tank.

4. The steam condensation return water heat utilization device according to claim 1, characterized in that: The heat conduction pipe is arranged in an "S" shape, the water inlet side pipe is connected to the input port of each heat conduction pipe in the vertical direction, and the water discharge side pipe is connected to the output port of each heat conduction pipe in the vertical direction.

5. The steam condensation return water heat utilization device according to claim 1, characterized in that: The end of the top connecting pipe of the preheating box is connected to the end of the output pipe away from the return pipe, the end of the bottom connecting pipe of the preheating box is connected to the end of the input pipe, the bottom end of the water inlet side pipe is connected to the end of the water outlet pipe, and the top of the drainage side pipe is connected to the end of the water inlet pipe away from the water storage tank.

6. The steam condensation return water heat utilization device according to claim 1, characterized in that: The air guide pipe passes through the top of the side of the return water tank, and a solenoid valve is provided at one end of the air guide pipe located inside the return water tank. An exhaust pipe is provided at the top of the pressure relief pipe, and the end of the exhaust pipe is connected to the end of the intake pipe.

7. A method for using a steam condensation return water heat utilization device, characterized in that: The following steps are involved: S1. Inject high-temperature condensed return water from an external high-temperature condensed return water storage container into the return water tank for storage, and inject normal-temperature water into the water storage tank for storage; S2, injecting the normal temperature water in the water storage tank into the heat transfer pipe in the preheating box through the water outlet pipe and the water inlet side pipe, and returning to the water storage tank through the drainage side pipe and the water inlet pipe; S3, extracting the high-temperature condensed return water in the return water tank and inputting it into the preheating box, and returning it to the return water tank through the output pipe and the return pipe, heating the normal-temperature water flowing in the heat transfer pipe, and cooling the high-temperature condensed return water in the return water tank; S4, after the normal temperature water in the water storage tank is heated to the specified temperature, water is added to the external boiler. After the water is added, normal temperature water is added to the water storage tank and the water in the return water tank is added to the water storage tank, and then high temperature condensed return water is added to the return water tank; S5. When the heat transfer plate is blocked, the drainage side pipe is closed, the second water pump works alternately forward and reverse, the rubber tube is elastically stretched, and the heat transfer plates on both sides of the heat transfer pipe are separated from each other. When the second water pump works in the reverse direction, the rubber tube drives the heat transfer plate to shrink and reset, and the impurities blocked in the guide hole are shaken off; S6. When there is a lot of scale on the heat transfer plate, heat the water in the water storage tank and repeat the above steps. At this time, due to the high temperature of the water entering the heat transfer tube, the rubber tube drives the heat transfer plate to further extend, and the heat transfer plates between two adjacent heat transfer tubes collide, breaking and falling off the scale attached to the heat transfer plate.

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