Low-temperature waste heat efficient recovery system

Abstract

The utility model discloses a low-temperature waste heat efficient recovery system which comprises a waste heat recovery mechanism, a filtering mechanism is arranged above the waste heat recovery mechanism, and a circulation structure is arranged on the surface of the waste heat recovery mechanism. The waste heat recovery mechanism comprises a heat preservation box, a heat exchange pipe penetrates through the surface of the heat preservation box, the top of the heat preservation box communicates with a liquid inlet flow dividing pipe, the surface of the liquid inlet flow dividing pipe communicates with a heat conduction pipe, the bottom of the heat conduction pipe communicates with a liquid outlet flow dividing pipe, and the liquid outlet flow dividing pipe penetrates out of the heat preservation box. A plurality of magnetic stirrers are fixed to the bottom of the heat preservation box, the heat preservation box is filled with heat conduction oil, and magnetic nanoparticles are added into the heat conduction oil; the filtering mechanism comprises a filtering box, the filtering box is fixed to the top of the heat preservation box, and the inner wall of the filtering box is slidably connected with two sealing discs. The utility model has the advantages that the filtering structure can be quickly replaced and cleaned, and the heat energy recovery efficiency can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of energy recovery, in particular to a high-efficiency low-temperature waste heat recovery system. Background Technique

[0002] Low-temperature waste heat includes waste heat such as flue gas waste heat, chemical reaction waste heat, and waste liquid waste heat. Low-temperature heat recovery is the recovery and utilization of relatively low thermal energy generally below 200°C, which is supplied to other energy-consuming units to achieve energy conservation and consumption reduction in industrial production, and to achieve the purpose of energy conservation and environmental protection. With the development of industry.

[0003] When the existing low-temperature waste heat recovery and utilization device recovers waste heat, it is necessary to filter the recovery medium before recovery. After the filtering structure arranged inside the recovery device is used for a period of time, it needs to be disassembled and cleaned. Generally, the filtering structure is fixed by fixing parts such as screws or bolts, and a thread cutter is needed for disassembly during disassembly, which is not convenient for users to quickly and conveniently disassemble, thus increasing the shutdown maintenance time and affecting the heat energy recovery efficiency. At the same time, when recovering waste heat, the waste heat is difficult to be concentrated and recovered, and the recovery equipment has low efficiency and is difficult to meet the use requirements. Content of the Utility Model

[0004] The purpose of the utility model is to provide a high-efficiency low-temperature waste heat recovery system, which has the advantages of being able to quickly replace and clean the filtering structure and improving the heat energy recovery efficiency.

[0005] To achieve the above purpose, the utility model provides the following technical solution: A high-efficiency low-temperature waste heat recovery system includes a waste heat recovery mechanism, a filtering mechanism is arranged above the waste heat recovery mechanism, and a circulation structure is arranged on the surface of the waste heat recovery mechanism;

[0006] The waste heat recovery mechanism includes a heat preservation box, a heat exchange tube penetrates through the surface of the heat preservation box, a liquid inlet shunt tube is connected to the top of the heat preservation box, a heat conduction tube is connected to the surface of the liquid inlet shunt tube, a liquid outlet shunt tube is connected to the bottom of the heat conduction tube, the liquid outlet shunt tube penetrates out of the heat preservation box, a plurality of magnetic stirrers are fixed to the bottom of the heat preservation box, and heat conduction oil is filled inside the heat preservation box, and magnetic nanoparticles are added to the heat conduction oil;

[0007] The filtering mechanism includes a filtering box, the filtering box is fixed to the top of the heat preservation box, two sealing discs are slidably connected to the inner wall of the filtering box, four receiving tubes are fixed to the surface of the sealing discs, filter elements are slidably connected to the inside of the receiving tubes, a conveying tube is connected to the bottom of the filtering box, the bottom of the conveying tube is connected to the top of the liquid inlet shunt tube, a driving structure is arranged on the top of the filtering box, and a cleaning door is hinged to the top of the filtering box.

[0008] Preferably, as a low-temperature waste heat efficient recovery system of the present utility model, the circulation structure includes a liquid extraction pipe, the liquid extraction pipe is connected to the bottom of the heat preservation box, one end of the liquid extraction pipe is connected to a delivery pump, one end of the delivery pump is connected to a liquid delivery pipe, and the liquid delivery pipe is connected to the top of the heat preservation box.

[0009] Preferably, as a low-temperature waste heat efficient recovery system of the present utility model, the driving structure on the top of the filtration box includes a driving shaft and a rotating shaft. The driving shaft is rotatably connected to the top of the heat preservation box. The rotating shaft passes through the filtration box and is fixedly connected to the top of the upper sealing disc. An active wheel is fixed on the surface of the driving shaft. A cam disc is fixed on the surface of the active wheel. A driven wheel is slidably connected to the surface of the cam disc. The driven wheel is fixed on the surface of the rotating shaft. A push rod is fixed on the surface of the active wheel. Four grooves are formed on the surface of the driven wheel.

[0010] Preferably, as a low-temperature waste heat efficient recovery system of the present utility model, a plurality of heat conducting sheets are fixed on the surface of the heat exchange pipe, and the heat conducting sheets are made of copper alloy.

[0011] Preferably, as a low-temperature waste heat efficient recovery system of the present utility model, the heat exchange pipe is arranged in a serpentine structure, and the heat conducting pipe is arranged in a spiral structure.

[0012] Preferably, a pressure gauge and a pressure relief valve are installed on the top of the heat preservation box.

[0013] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0014] 1. Through the setting of the waste heat recovery mechanism of the present utility model, the heat in the low-temperature waste liquid can be recovered and utilized. The low-temperature waste heat liquid is divided into multiple heat conducting pipes through the liquid inlet shunt pipe and discharged through the liquid outlet shunt pipe. The heat exchange medium to be heated enters from the upper end of the heat exchange pipe and flows out from the lower end of the heat exchange pipe. The low-temperature waste heat liquid inside the heat conducting pipe can transfer its own heat to the heat conducting oil through the heat conducting pipe, and the heat conducting oil can transfer the heat to the heat exchange pipe again, thereby completing the heat exchange effect and realizing waste heat recovery. At the same time, since magnetic nanoparticles are added to the heat conducting oil, the presence of the magnetic nanoparticles increases the heat conduction path of the fluid, making the heat easier to transfer, which can significantly improve the thermal conductivity of the heat conducting oil. At the same time, the magnetic stirrer can control the movement of the magnetic nanoparticles through the magnetic field, thereby stirring the heat conducting oil. This can increase the turbulence degree of the heat conducting oil, break the boundary layer, improve the heat exchange efficiency, help the temperature inside the heat conducting oil to be evenly distributed, and avoid local overheating or overcooling phenomena, realizing the effect of efficiently recovering waste heat.

[0015] 2. Through the setting of the filtering mechanism, the low-temperature waste heat liquid can enter the interior of the filtering box through the heat medium inlet. After being filtered by the filter element, the waste heat liquid enters the interior of the liquid inlet shunt pipe, enabling the heat conduction pipe to exchange heat with the heat conduction oil. The filter element can block impurities in the waste heat liquid. When the filter element needs to be replaced, the sealed disc is rotated 90 degrees through the driving structure, enabling the unused filter element to rotate to below the heat medium inlet and above the conveying pipe. In this way, the used filter element and the unused filter element can exchange positions, so that the new filter element can continue the filtering work, extending the entire replacement cycle of the filter elements of the device, reducing the manual replacement frequency. After all the filter elements need to be replaced, the cleaning door is opened, and then the filter element is directly pulled upward to take out and replace it from the storage pipe, thereby improving the convenience during filter element replacement, reducing the downtime for maintenance, and improving the waste heat recovery efficiency and replacement efficiency.

[0016] 3. Through the setting of the circulation structure, when the liquid extraction pipe is working, it can extract the heat conduction oil below the interior of the heat preservation box and re-transport it to the upper part of the interior of the heat preservation box through the liquid delivery pipe, thus realizing the forced circulation flow of the heat conduction oil. This forced circulation can increase the turbulence degree of the heat conduction oil, which is more conducive to the work of the magnetic stirrer, increasing the fluidity of the heat conduction oil and the uniformity of stirring. The combination of the two can further improve the heat transfer efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a three-dimensional structural schematic diagram of the present utility model;

[0018] Figure 2 is a sectional structural schematic diagram of the present utility model;

[0019] Figure 3 is a partial sectional structural schematic diagram of the present utility model;

[0020] Figure 4 is a partial structural schematic diagram of the present utility model;

[0021] Figure 5 is a sectional structural schematic diagram of the filtering mechanism in the present utility model;

[0022] Figure 6 is the present utility model Figure 5 The enlarged structural schematic diagram of part A in.

[0023] In the figure: 1. Waste heat recovery mechanism; 101. Insulation box; 102. Heat exchange tube; 103. Inlet liquid shunt tube; 104. Heat conduction tube; 105. Outlet liquid shunt tube; 106. Magnetic stirrer; 107. Pressure gauge; 108. Pressure relief valve; 2. Filtering mechanism; 201. Filter box; 202. Sealing disc; 203. Storage tube; 204. Filter element; 205. Cleaning door; 206. Delivery tube; 207. Rotating shaft; 208. Driven wheel; 209. Driving shaft; 210. Driving wheel; 211. Cam disc; 212. Push rod; 3. Circulation structure; 301. Liquid extraction tube; 302. Delivery pump; 303. Liquid supply tube. Detailed implementation manners

[0024] Please refer to Figures 1 - 6 , a low-temperature waste heat high-efficiency recovery system, including a waste heat recovery mechanism 1, a filtering mechanism 2 is arranged above the waste heat recovery mechanism 1, and a circulation structure 3 is arranged on the surface of the waste heat recovery mechanism 1;

[0025] The waste heat recovery mechanism 1 can recover and utilize the heat in the low-temperature waste liquid, the filtering mechanism 2 can intercept and filter the impurities in the low-temperature waste liquid, and the circulation structure 3 enables the heat-conducting oil inside the insulation box 101 to perform forced circulation.

[0026] The waste heat recovery mechanism 1 includes an insulation box 101, a heat exchange tube 102 penetrates through the surface of the insulation box 101, an inlet liquid shunt tube 103 is connected to the top of the insulation box 101, a heat conduction tube 104 is connected to the surface of the inlet liquid shunt tube 103, the heat conduction tube 104 is located inside the insulation box 101, an outlet liquid shunt tube 105 is connected to the bottom of the heat conduction tube 104, the outlet liquid shunt tube 105 penetrates out of the insulation box 101, a plurality of magnetic stirrers 106 are fixed to the bottom of the insulation box 101, heat-conducting oil is filled inside the insulation box 101, and magnetic nanoparticles are added to the heat-conducting oil;

[0027] The low-temperature waste heat waste liquid is shunted to a plurality of heat conduction tubes 104 through the inlet liquid shunt tube 103 and discharged through the outlet liquid shunt tube 105, while the heat exchange medium to be heated enters through the upper end of the heat exchange tube 102 and flows out through the lower end of the heat exchange tube 102. The low-temperature waste heat waste liquid inside the heat conduction tube 104 can transfer its own heat to the heat-conducting oil through the heat conduction tube 104, and the heat-conducting oil can transfer the heat to the heat exchange tube 102 again, thereby completing the heat exchange effect and realizing waste heat recovery. At the same time, since magnetic nanoparticles are added to the heat-conducting oil, the presence of magnetic nanoparticles increases the heat conduction path of the fluid, making the heat easier to transfer, which can significantly improve the thermal conductivity of the heat-conducting oil. At the same time, the magnetic stirrer 106 can control the movement of magnetic nanoparticles through the magnetic field, thereby agitating the heat-conducting oil. This can increase the turbulence degree of the heat-conducting oil, break the boundary layer, improve the heat exchange efficiency, help the temperature inside the heat-conducting oil to be evenly distributed, avoid local overheating or overcooling phenomena, and realize the effect of high-efficiency waste heat recovery.

[0028] The filtering mechanism 2 includes a filtering box 201. A hot medium inlet is connected to the top of the filtering box 201. The filtering box 201 is fixed to the top of the heat preservation box 101. Two sealed disks 202 are slidably connected to the inner wall of the filtering box 201. Four water channels are formed on the surface of the sealed disk 202. Four receiving pipes 203 are fixed to the surface of the sealed disk 202. A filter element 204 is slidably connected inside the receiving pipe 203. A delivery pipe 206 is connected to the bottom of the filtering box 201. The bottom of the delivery pipe 206 is connected to the top of the liquid inlet shunt pipe 103. A driving structure is arranged on the top of the filtering box 201. A cleaning door 205 is hinged to the top of the filtering box 201;

[0029] The low-temperature waste heat liquid enters the inside of the filtering box 201 through the hot medium inlet. After being filtered by the filter element 204, the waste heat liquid enters the inside of the liquid inlet shunt pipe 103, enabling the heat conduction pipe 104 to exchange heat with the heat conduction oil. The filter element 204 can block impurities in the waste heat liquid. When the filter element 204 needs to be replaced, the sealed disk 202 is rotated 90 degrees through the driving structure, so that the unused filter element 204 can rotate to below the hot medium inlet and above the delivery pipe 206. In this way, the used filter element 204 and the unused filter element 204 can exchange positions, enabling the new filter element 204 to continue the filtering work, extending the entire replacement cycle of the filter element 204 of the device, reducing the manual replacement frequency. After all the filter elements 204 are used up and need to be replaced, the cleaning door 205 is opened, and then the filter element 204 is directly pulled upward to take out and replace the filter element 204 from the inside of the receiving pipe 203, thereby improving the convenience during the replacement of the filter element 204, reducing the shutdown maintenance time, and improving the waste heat recovery efficiency and replacement efficiency.

[0030] Further, the circulation structure 3 includes a liquid extraction pipe 301. The liquid extraction pipe 301 is connected to the bottom of the heat preservation box 101. One end of the liquid extraction pipe 301 is connected to a delivery pump 302. One end of the delivery pump 302 is connected to a liquid delivery pipe 303. The liquid delivery pipe 303 is connected to the top of the heat preservation box 101;

[0031] During operation, the liquid extraction pipe 301 can extract the heat conduction oil below the inside of the heat preservation box 101 and re-transport it to the upper part inside the heat preservation box 101 through the liquid delivery pipe 303, thereby realizing the forced circulation flow of the heat conduction oil. This forced circulation can increase the turbulence degree of the heat conduction oil, thus being more conducive to the operation of the magnetic stirrer 106. This can increase the fluidity of the heat conduction oil and the uniformity of stirring. The combination of the two can further improve the heat transfer efficiency.

[0032] Further, the top drive structure of the filter box 201 includes a drive shaft 209 and a rotating shaft 207. The drive shaft 209 is rotatably connected to the top of the insulation box 101. The rotating shaft 207 passes through the filter box 201 and is fixedly connected to the top of the upper sealing disc 202. A driving wheel 210 is fixed on the surface of the drive shaft 209. A cam disc 211 is fixed on the surface of the driving wheel 210. A driven wheel 208 is slidably connected to the surface of the cam disc 211. The driven wheel 208 is fixed on the surface of the rotating shaft 207. A push rod 212 is fixed on the surface of the driving wheel 210. Four grooves are formed on the surface of the driven wheel 208;

[0033] When the drive shaft 209 rotates, the driving wheel 210 can drive the cam disc 211 to rotate. After the driven wheel 208 no longer fits the surface of the cam disc 211 during rotation, the push rod 212 will be able to enter the groove, so that the push rod 212 can drive the driven wheel 208 to rotate 90 degrees, enabling the rotating shaft 207 to perform a rotation operation on the sealing disc 202, and enabling the positions between the multiple storage tubes 203 to be swapped.

[0034] Further, a plurality of heat conducting fins 109 are fixed on the surface of the heat exchange tube 102. The heat conducting fins 109 are made of copper alloy;

[0035] The heat conducting fins 109 can increase the heat exchange area, enabling the heat exchange tube 102 to better absorb the heat of the heat conducting oil, thereby improving the heat exchange efficiency.

[0036] Further, the heat exchange tube 102 is arranged in a serpentine structure, and the heat conducting tube 104 is arranged in a spiral structure;

[0037] Both the spiral and serpentine structures can increase the pipe length, which can increase the heat exchange area, enable the fluid to stay in the pipe for a longer time, increase the contact time between the fluid and the pipe wall, and improve the heat exchange efficiency.

[0038] Further, a pressure gauge 107 and a pressure relief valve 108 are installed on the top of the insulation box 101;

[0039] The pressure relief valve 108 can automatically open when the pressure inside the insulation box 101 exceeds a predetermined safety threshold to release the excess pressure, while the pressure gauge 107 monitors the pressure inside the insulation box 101.

[0040] The above are only the preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A low-temperature waste heat high-efficiency recovery system, characterized by: It comprises a waste heat recovery mechanism (1), a filtering mechanism (2) is provided above the waste heat recovery mechanism (1), and a circulation structure (3) is provided on the surface of the waste heat recovery mechanism (1); The waste heat recovery mechanism (1) comprises an insulation box (101), a heat exchange tube (102) passing through the surface of the insulation box (101), a liquid inlet shunt tube (103) connected to the top of the insulation box (101), a heat conduction tube (104) connected to the surface of the liquid inlet shunt tube (103), a liquid outlet shunt tube (105) connected to the bottom of the heat conduction tube (104), the liquid outlet shunt tube (105) passing through the insulation box (101), a plurality of magnetic stirrers (106) fixed to the bottom of the insulation box (101), and the interior of the insulation box (101) is filled with heat conduction oil, and magnetic nanoparticles are added to the heat conduction oil; The filtering mechanism (2) comprises a filter box (201), the filter box (201) being fixed to the top of the heat preservation box (101), two sealed disks (202) being slidably connected to the inner wall of the filter box (201), four receiving tubes (203) being fixed to the surface of the sealed disk (202), a filter element (204) being slidably connected inside the receiving tube (203), a delivery tube (206) being connected to the bottom of the filter box (201), the bottom of the delivery tube (206) being connected to the top of the liquid inlet diversion tube (103), a driving structure being provided on the top of the filter box (201), and a cleaning door (205) being hingedly connected to the top of the filter box (201).

2. The low-temperature waste heat efficient recovery system according to claim 1, characterized in that: The circulation structure (3) comprises a liquid extraction pipe (301), the liquid extraction pipe (301) is connected to the bottom of the heat preservation box (101), one end of the liquid extraction pipe (301) is connected to a delivery pump (302), one end of the delivery pump (302) is connected to a liquid delivery pipe (303), and the liquid delivery pipe (303) is connected to the top of the heat preservation box (101).

3. The low-temperature waste heat efficient recovery system according to claim 1, characterized in that: The top driving structure of the filter box (201) comprises a driving shaft (209) and a rotating shaft (207); the driving shaft (209) is rotatably connected to the top of the heat preservation box (101); the rotating shaft (207) passes through the filter box (201) and is fixedly connected to the top of the upper sealing disk (202); a driving wheel (210) is fixed on the surface of the driving shaft (209); a cam disk (211) is fixed on the surface of the driving wheel (210); a driven wheel (208) is slidably connected to the surface of the cam disk (211); the driven wheel (208) is fixed to the surface of the rotating shaft (207); a push rod (212) is fixed on the surface of the driving wheel (210); and four grooves are provided on the surface of the driven wheel (208).

4. The low-temperature waste heat efficient recovery system according to claim 1, characterized in that: A plurality of heat conducting fins (109) are fixed on the surface of the heat exchange tube (102), and the heat conducting fins (109) are made of copper alloy.

5. The low-temperature waste heat efficient recovery system according to claim 1, characterized in that: The heat exchange tube (102) is arranged in a serpentine structure, and the heat conduction tube (104) is arranged in a spiral structure.

6. The low-temperature waste heat efficient recovery system according to claim 1, characterized in that: A pressure gauge (107) and a pressure relief valve (108) are installed on the top of the heat preservation box (101).

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