Conduction oil secondary circulation heat recovery device

Abstract

The utility model relates to the technical field of heat conduction oil furnaces, in particular to a heat conduction oil secondary circulation heat recovery device which not only can utilize residual heat in heat conduction oil and improve the energy utilization rate, but also can filter the heat conduction oil and prevent impurities in the heat conduction oil from influencing the service life of a circulation pipeline. Comprising a liquid storage mechanism; the device further comprises a filtering mechanism, a stirring mechanism, a centrifugal mechanism and a heat exchange mechanism, the filtering mechanism is installed on the liquid storage mechanism and conducts primary filtering on the heat conduction oil, the stirring mechanism is installed on the liquid storage mechanism and conducts stirring on the heat conduction oil, and the centrifugal mechanism is installed on the stirring mechanism and conducts centrifugal filtering on the heat conduction oil. The heat exchange mechanism is installed on the liquid storage mechanism and utilizes waste heat in the heat conduction oil.

Description

Technical Field

[0001] This utility model relates to the technical field of thermal oil furnaces, and in particular to a heat recovery device for secondary circulation of thermal oil. Background Technology

[0002] The thermal oil heater heats the thermal oil in the heating coil through a flame burner, and then uses a high-temperature oil pump to circulate the heated thermal oil to the heat-using equipment. The heated thermal oil then returns from the outlet of the heat-using equipment to the electric heating oil heater for reheating, thus forming a complete circulating heating system.

[0003] Existing heat recovery devices for secondary circulation of thermal oil, such as the heat recovery device for a thermal oil furnace disclosed in utility model patent application number 201821303836.9, mainly include a heat collection pipe installed on the furnace body and covering the heating coil located at the oil outlet end outside the furnace body, an air inlet pipe installed between the heat collection pipe and the air inlet of the furnace body, and a first induced draft fan installed between the heat collection pipe and the air inlet pipe. An air inlet is formed at the end of the heat collection pipe away from the furnace body. In use, the heat collection pipe covers the heating coil located at the oil outlet end outside the furnace body. At this time, the heat emitted by the heating coil can heat the air inside the heat collection pipe. Thus, when the first induced draft fan is turned on to provide air to the furnace body, the air enters the heat collection pipe from the air inlet. After being heated, the air is transported to the furnace body through the air inlet pipe, and finally the heat is recovered.

[0004] However, in existing processes, most of the heat transfer oil is directly returned to the heating furnace for reheating, resulting in a large amount of medium and low temperature waste heat not being utilized, causing energy waste. Moreover, there may be many impurities in the circulating heat transfer oil, and most existing devices do not filter it. Impurities in the pipeline can easily affect the service life of the pipeline. Utility Model Content

[0005] To solve the above-mentioned technical problems, this utility model provides a heat recovery device for secondary circulation of heat transfer oil, which can not only utilize the residual heat in the heat transfer oil and improve the energy utilization rate, but also filter the heat transfer oil to avoid impurities in the heat transfer oil affecting the service life of the circulation pipeline.

[0006] This utility model discloses a heat recovery device for secondary circulation of heat transfer oil, comprising a liquid storage mechanism; it also includes a filtration mechanism, a stirring mechanism, a centrifugal mechanism, and a heat exchange mechanism. The filtration mechanism is installed on the liquid storage mechanism to perform primary filtration of the heat transfer oil; the stirring mechanism is installed on the liquid storage mechanism to stir the heat transfer oil; the centrifugal mechanism is installed on the stirring mechanism to perform centrifugal filtration of the heat transfer oil; and the heat exchange mechanism is installed on the liquid storage mechanism to utilize the residual heat in the heat transfer oil. The heat transfer oil is transported into the liquid storage mechanism, the filtration mechanism filters the heat transfer oil, the stirring mechanism is activated to stir the heat transfer oil, accelerating the filtration process, and the filtered heat transfer oil enters the centrifugal mechanism. The stirring mechanism drives the centrifugal mechanism to rotate and centrifuge the heat transfer oil, and the heat transfer oil enters the liquid storage mechanism to heat the heat transfer oil in the heat exchange mechanism, utilizing the residual heat in the heat transfer oil.

[0007] Preferably, the liquid storage mechanism includes a heat-insulating tank, an oil inlet pipe, an oil outlet pipe, and a temperature control valve. The bottom of the heat-insulating tank is connected to the ground, and the inside of the heat-insulating tank is provided with a cavity. The bottom of the oil inlet pipe is connected to the inside of the top of the heat-insulating tank, and the top of the oil outlet pipe is connected to the inside of the bottom of the heat-insulating tank. The temperature control valve is installed on the oil outlet pipe. The oil inlet pipe and the oil outlet pipe are connected to a heat transfer oil circulation pipeline. The heat transfer oil is transported into the cavity of the heat-insulating tank through the oil inlet pipe. The temperature control valve detects the temperature of the heat transfer oil. When the heat in the heat transfer oil is completely exchanged by the heat exchange mechanism, the valve is opened, and the heat transfer oil is transported back to the heat transfer oil furnace through the oil outlet pipe.

[0008] Preferably, the filtration mechanism includes a guide bucket, a filter element, and a positioning seat. The guide bucket is installed at the top of the cavity inside the heat-insulating barrel, the top of the filter element is connected to the bottom of the guide bucket, and the positioning seat is installed on the guide bucket. After the heat transfer oil enters the cavity of the heat-insulating barrel, it flows to the filter element through the guide bucket. The filter element filters the heat transfer oil once, and the positioning seat positions the centrifugal mechanism to maintain its rotational stability.

[0009] Preferably, the inner surface of the insulation tank and the upper surface of the guide hopper are coated with a polytetrafluoroethylene (PTFE) coating. The PTFE coating is not only resistant to high temperature and chemical corrosion, preventing the heat transfer oil from corroding the device and extending the service life of the device, but also has an ultra-low surface energy, which can prevent the heat transfer oil from sticking to the inner surface of the insulation tank and the upper surface of the guide hopper.

[0010] Preferably, the stirring mechanism includes a motor, a reducer, a drive shaft, and a stirring scraper. The bottom end of the motor is connected to the top end of the insulation tank, and the bottom end of the reducer is also connected to the top end of the insulation tank. The drive shaft is rotatably installed in the cavity of the insulation tank and longitudinally connected to the reducer. The stirring scraper is installed on the drive shaft and positioned above the filter element. When the motor is started, it drives the drive shaft and the stirring scraper to rotate via the reducer. The rotating stirring scraper stirs the heat transfer oil, accelerating its passage through the filter element. Simultaneously, the stirring scraper can scrape off any residual heat transfer oil on the surface of the guide bucket, preventing waste caused by residual heat transfer oil inside the device.

[0011] Preferably, the centrifugal mechanism includes a centrifugal cylinder, a cone, a positioning ring, and three sets of baffles. The centrifugal cylinder is mounted on a drive shaft, the cone is installed inside the centrifugal cylinder, the positioning ring is mounted on the centrifugal cylinder and engages with a positioning seat, and all three sets of baffles are mounted on the drive shaft. The heat transfer oil after primary filtration by the filter element enters the centrifugal cylinder. The drive shaft drives the centrifugal cylinder to rotate, centrifugally filtering the heat transfer oil. The cone facilitates the accelerated ejection of the heat transfer oil. The positioning ring, in conjunction with the positioning seat, limits the top of the centrifugal cylinder, ensuring the rotational stability of the centrifugal cylinder. At the same time, the drive shaft drives the three sets of baffles to rotate, ensuring that the ejected heat transfer oil is evenly distributed.

[0012] Preferably, the heat exchange mechanism includes a water pump, a pumping pipe, a delivery pipe, a heat exchange tube, a drain pipe, and a thermometer. The water pump is installed on the insulated tank, the pumping pipe is installed on the water pump and communicates with the inside of the water source, the delivery pipe is installed on the water pump, the heat exchange tube is installed in the cavity of the insulated tank and communicates with the inside of the delivery pipe, the drain pipe communicates with the inside of the heat exchange tube, and the thermometer is installed on the drain pipe. When the water pump is started, the water pump draws water through the pumping pipe and delivers the water to the heat exchange tube through the delivery pipe. The heat transfer oil heats the water through the heat exchange tube, and the water is discharged through the drain pipe. The thermometer detects the temperature of the discharged water.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows: the heat transfer oil is transported to the liquid storage mechanism, the filtration mechanism filters the heat transfer oil, the stirring mechanism is started to stir the heat transfer oil, the heat transfer oil is accelerated to pass through the filtration mechanism, the heat transfer oil enters the centrifugal mechanism after filtration, the stirring mechanism drives the centrifugal mechanism to rotate to centrifuge and filter the heat transfer oil, the heat transfer oil enters the liquid storage mechanism to heat the heat transfer oil in the heat exchange mechanism, and the residual heat in the heat transfer oil is utilized. Attached Figure Description

[0014] Figure 1 This is a cross-sectional axonometric structural schematic diagram of this utility model;

[0015] Figure 2 This is a front view structural diagram of the liquid storage mechanism of this utility model;

[0016] Figure 3This is a cross-sectional isometric structural diagram of the filtration mechanism, stirring mechanism, and centrifugation mechanism of this utility model;

[0017] Figure 4 This is a front view cross-sectional structural diagram of the heat exchange mechanism of this utility model.

[0018] The attached diagram is labeled as follows: 01, liquid storage mechanism; 11, insulated tank; 12, oil inlet pipe; 13, oil outlet pipe; 14, temperature control valve; 02, filtration mechanism; 21, guide bucket; 22, filter element; 23, positioning seat; 03, stirring mechanism; 31, electric motor; 32, reducer; 33, drive shaft; 34, stirring scraper; 04, centrifugation mechanism; 41, centrifuge cylinder; 42, cone; 43, positioning ring; 44, baffle plate; 05, heat exchange mechanism; 51, water pump; 52, water suction pipe; 53, water delivery pipe; 54, heat exchange tube; 55, drain pipe; 56, thermometer. Detailed Implementation

[0019] To facilitate understanding of this utility model, a more complete description will be given below with reference to the accompanying drawings. This utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to make the disclosure of this utility model more thorough and complete. Example 1

[0020] This utility model discloses a heat recovery device for secondary circulation of heat transfer oil, comprising a liquid storage mechanism 01; it also includes a filtration mechanism 02, a stirring mechanism 03, a centrifugal mechanism 04, and a heat exchange mechanism 05. The filtration mechanism 02 is installed on the liquid storage mechanism 01 and performs primary filtration of the heat transfer oil; the stirring mechanism 03 is installed on the liquid storage mechanism 01 and stirs the heat transfer oil; the centrifugal mechanism 04 is installed on the stirring mechanism 03 and centrifugally filters the heat transfer oil; and the heat exchange mechanism 05 is installed on the liquid storage mechanism 01. The system utilizes the residual heat in the heat transfer oil. The liquid storage mechanism 01 includes an insulated tank 11, an oil inlet pipe 12, an oil outlet pipe 13, and a temperature control valve 14. The bottom of the insulated tank 11 is connected to the ground, and the inside of the insulated tank 11 has a cavity. The bottom of the oil inlet pipe 12 is connected to the top of the insulated tank 11, and the top of the oil outlet pipe 13 is connected to the bottom of the insulated tank 11. The temperature control valve 14 is installed on the oil outlet pipe 13. The filtration mechanism 02 includes a guide bucket 21, a filter element 22, and a positioning seat 23. The guide hopper 21 is installed at the top of the cavity inside the insulated bucket 11, the top of the filter element 22 is connected to the bottom of the guide hopper 21, and the positioning seat 23 is installed on the guide hopper 21; it also includes a polytetrafluoroethylene coating sprayed on the inner surface of the insulated bucket 11 and the upper surface of the guide hopper 21; the stirring mechanism 03 includes a motor 31, a reducer 32, a drive shaft 33, and a stirring scraper 34, the bottom of the motor 31 is connected to the top of the insulated bucket 11, and the bottom of the reducer 32 is connected to the top of the insulated bucket 11. The drive shaft 33 is rotatably installed in the cavity of the heat preservation tank 11 and longitudinally connected to the reducer 32. The stirring scraper 34 is installed on the drive shaft 33 and located above the filter element 22. The centrifugal mechanism 04 includes a centrifugal cylinder 41, a cone 42, a positioning ring 43 and three sets of baffles 44. The centrifugal cylinder 41 is installed on the drive shaft 33, the cone 42 is installed inside the centrifugal cylinder 41, the positioning ring 43 is installed on the centrifugal cylinder 41 and fits with the positioning seat 23, and the three sets of baffles 44 are all installed on the drive shaft 33.During operation, firstly, the oil inlet pipe 12 and the oil outlet pipe 13 are connected to form a uniform heat transfer oil circulation pipeline. The heat transfer oil is transported to the cavity of the insulation tank 11 through the oil inlet pipe 12. After entering the cavity of the insulation tank 11, the heat transfer oil flows to the filter element 22 through the guide bucket 21. The filter element 22 performs a primary filtration of the heat transfer oil. Then, the motor 31 is started. The motor 31 drives the transmission shaft 33 and the stirring scraper 34 to rotate through the reducer 32. The rotating stirring scraper 34 stirs the heat transfer oil, accelerating its passage through the filter element 22. At the same time, the stirring scraper 34 can scrape off the heat transfer oil remaining on the surface of the guide bucket 21, preventing waste caused by residual heat transfer oil in the device. After primary filtration, the heat transfer oil enters the centrifuge cylinder 41. The drive shaft 33 drives the centrifuge cylinder 41 to rotate, centrifuging and filtering the heat transfer oil. A cone 42 is provided to facilitate the accelerated ejection of the heat transfer oil. A positioning ring 43, in conjunction with a positioning seat 23, limits the top of the centrifuge cylinder 41, ensuring its rotational stability. Simultaneously, the drive shaft 33 drives three sets of baffles 44 to rotate, ensuring even distribution of the ejected heat transfer oil, facilitating heat exchange with the heat exchange mechanism 05 and utilizing residual heat. The temperature control valve 14 monitors the temperature of the heat transfer oil. Once the heat in the heat transfer oil has been completely exchanged by the heat exchange mechanism 05, the valve opens, and the heat transfer oil is transported back to the heat transfer oil furnace through the oil drain pipe 13. Example 2

[0021] like Figures 1 to 4As shown, this utility model discloses a heat recovery device for secondary circulation of heat transfer oil, based on Embodiment 1. The heat exchange mechanism 05 includes a water pump 51, a water suction pipe 52, a water delivery pipe 53, a heat exchange pipe 54, a drain pipe 55, and a thermometer 56. The water pump 51 is installed on the insulation tank 11, the water suction pipe 52 is installed on the water pump 51 and communicates with the water source, the water delivery pipe 53 is installed on the water pump 51, the heat exchange pipe 54 is installed in the cavity of the insulation tank 11 and communicates with the inside of the water delivery pipe 53, and the drain pipe 55 communicates with the inside of the heat exchange pipe 54. The system is connected, and thermometer 56 is installed on drain pipe 55. During operation, firstly, the oil inlet pipe 12 and oil outlet pipe 13 are connected to form a uniform heat transfer oil circulation pipeline. The heat transfer oil is transported through oil inlet pipe 12 into the cavity of the insulation tank 11. After entering the cavity of the insulation tank 11, the heat transfer oil flows through guide bucket 21 to filter element 22. Filter element 22 performs a first filtration of the heat transfer oil. Then, motor 31 is started. Motor 31 drives transmission shaft 33 and stirring scraper 34 to rotate through reducer 32. The rotating stirring scraper 34 moves the heat transfer oil... The stirring process accelerates the flow of heat transfer oil through filter element 22. Simultaneously, the stirring scraper 34 scrapes off any residual heat transfer oil on the surface of guide bucket 21, preventing waste. The heat transfer oil, filtered once by filter element 22, enters centrifuge cylinder 41. Drive shaft 33 rotates centrifuge cylinder 41, centrifuging and filtering the heat transfer oil. A cone 42 facilitates faster oil ejection. Positioning ring 43, in conjunction with positioning seat 23, limits the top of centrifuge cylinder 41, ensuring rotational stability. Simultaneously, the drive shaft... Shaft 33 drives three sets of baffles 44 to rotate, so that the ejected heat transfer oil is evenly distributed. Water pump 51 is started, and water pump 51 draws water through water pumping pipe 52 and delivers water to heat exchange pipe 54 through water delivery pipe 53. Heat transfer oil heats water through heat exchange pipe 54. Water is discharged through drain pipe 55. Thermometer 56 detects the temperature of the discharged water. Temperature control valve 14 detects the temperature of heat transfer oil. When the heat in the heat transfer oil is completely exchanged by heat exchange mechanism 05, it is opened, and heat transfer oil is transported back to heat transfer oil furnace through oil drain pipe 13.

[0022] The electric motor 31, reducer 32, and water pump 51 of this utility model are commercially available. Technical personnel in this industry only need to install and operate them according to the accompanying instruction manual, without requiring any creative work from those skilled in the art.

[0023] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A heat recovery device for secondary circulation of heat transfer oil, comprising a liquid storage mechanism (01); characterized in that, It also includes a filtration mechanism (02), a stirring mechanism (03), a centrifugal mechanism (04), and a heat exchange mechanism (05). The filtration mechanism (02) is installed on the liquid storage mechanism (01) and performs primary filtration of the heat transfer oil. The stirring mechanism (03) is installed on the liquid storage mechanism (01) and stirs the heat transfer oil. The centrifugal mechanism (04) is installed on the stirring mechanism (03) and performs centrifugal filtration of the heat transfer oil. The heat exchange mechanism (05) is installed on the liquid storage mechanism (01) and utilizes the residual heat in the heat transfer oil.

2. The heat recovery device for secondary circulation of heat transfer oil as described in claim 1, characterized in that, The liquid storage mechanism (01) includes a heat preservation tank (11), an oil inlet pipe (12), an oil outlet pipe (13), and a temperature control valve (14). The bottom end of the heat preservation tank (11) is connected to the ground. The inside of the heat preservation tank (11) is provided with a cavity. The bottom end of the oil inlet pipe (12) is connected to the inside of the top end of the heat preservation tank (11). The top end of the oil outlet pipe (13) is connected to the inside of the bottom end of the heat preservation tank (11). The temperature control valve (14) is installed on the oil outlet pipe (13).

3. The heat recovery device for secondary circulation of heat transfer oil as described in claim 2, characterized in that, The filtration mechanism (02) includes a flow guide (21), a filter element (22) and a positioning seat (23). The flow guide (21) is installed at the top of the cavity inside the heat preservation barrel (11). The top of the filter element (22) is connected to the bottom of the flow guide (21). The positioning seat (23) is installed on the flow guide (21).

4. The heat recovery device for secondary circulation of heat transfer oil as described in claim 3, characterized in that, It also includes a polytetrafluoroethylene coating sprayed on the inner surface of the insulated bucket (11) and the upper surface of the guide bucket (21).

5. The heat recovery device for secondary circulation of heat transfer oil as described in claim 3, characterized in that, The stirring mechanism (03) includes a motor (31), a reducer (32), a drive shaft (33), and a stirring scraper (34). The bottom end of the motor (31) is connected to the top end of the heat preservation barrel (11), the bottom end of the reducer (32) is connected to the top end of the heat preservation barrel (11), the drive shaft (33) is rotatably installed in the cavity of the heat preservation barrel (11) and longitudinally connected to the reducer (32), and the stirring scraper (34) is installed on the drive shaft (33) and located above the filter element (22).

6. The heat recovery device for secondary circulation of heat transfer oil as described in claim 5, characterized in that, The centrifugal mechanism (04) includes a centrifugal cylinder (41), a cone (42), a positioning ring (43), and three sets of baffles (44). The centrifugal cylinder (41) is mounted on the drive shaft (33), the cone (42) is mounted inside the centrifugal cylinder (41), the positioning ring (43) is mounted on the centrifugal cylinder (41) and fits with the positioning seat (23), and the three sets of baffles (44) are all mounted on the drive shaft (33).

7. The heat recovery device for secondary circulation of heat transfer oil as described in claim 2, characterized in that, The heat exchange mechanism (05) includes a water pump (51), a water pumping pipe (52), a water supply pipe (53), a heat exchange pipe (54), a drain pipe (55), and a thermometer (56). The water pump (51) is installed on the heat-insulating barrel (11), the water pumping pipe (52) is installed on the water pump (51) and connected to the inside of the water source, the water supply pipe (53) is installed on the water pump (51), the heat exchange pipe (54) is installed in the cavity of the heat-insulating barrel (11) and connected to the inside of the water supply pipe (53), the drain pipe (55) is connected to the inside of the heat exchange pipe (54), and the thermometer (56) is installed on the drain pipe (55).

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