A heat transfer oil oxidation protection device

Abstract

The present application relates to the field of heat conducting oil oxidation protection, and more particularly to a heat conducting oil oxidation protection device, which comprises an oil injection pipeline, an oil storage tank, a boiler, an oil using mechanism group, an oil gas separator, a filter, a circulating pump and an expansion tank, the oil injection pipeline is communicated with the oil storage tank, the first outlet end of the oil gas separator is communicated with the inlet end of the filter, one end of the expansion tank is communicated with the second outlet end of the oil gas separator, a new oil supply pipeline is communicated with the inlet end of the expansion tank, an overflow pipe is arranged on the expansion tank, the free end of the overflow pipe extends into the oil storage tank and extends below the oil liquid surface of the oil storage tank, an oil communication pipe is arranged on the overflow pipe, the oil communication pipe is connected with the lower end of the expansion tank, a sixth stop valve is arranged on the oil communication pipe, an oil storage exhaust pipe is arranged on the oil storage tank, and an expansion exhaust pipe is arranged on the expansion tank. The device solves the technical problem of serious oxidation of the existing heat conducting oil.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of heat conducting oil oxidation protection, in particular to a heat conducting oil oxidation protection device. BACKGROUND

[0002] For a heat conducting oil system, due to design, operation and other factors, the heat conducting oil in the expansion tank or oil tank will be exposed to air, and if in contact with air, oxidation reaction will occur, especially when the system heat load fluctuates greatly, the oil temperature in the expansion tank will rise, and when it exceeds 60 degrees, the reaction speed will significantly increase, causing the heat conducting oil to oxidize, the kinematic viscosity to increase, the heat transfer to slow down, the cracking to intensify, and even serious safety accidents. At present, there are some heat conducting oil oxidation protection devices, such as the heat conducting oil oxidation protection device disclosed in Chinese Patent No. CN203345509U, which belongs to the field of oxidation protection and includes a PLC programmable controller, a pressure gauge installed on the top of the high storage tank of the heat conducting oil furnace, an exhaust valve, an air inlet valve, a breather valve, etc. The high storage tank of the heat conducting oil furnace is connected to the inert gas tank through the exhaust valve and the air inlet valve, the pressure gauge is connected to the input end of the PLC programmable controller, and the exhaust valve, the air inlet valve and the breather valve are respectively connected to the output end of the PLC programmable controller.

[0003] However, in actual application, the expansion tank is usually set at a high position, usually 1.5-2 meters higher than the oil return pipeline, and the temperature of the expansion tank is also relatively high during actual production, which can reach 135 degrees at the highest, resulting in serious oxidation of the heat conducting oil and deterioration of the heat conducting oil. Based on this, the applicant designs a new scheme for the oxidation protection of heat conducting oil to change the technical problem of serious oxidation of existing heat conducting oil. SUMMARY

[0004] Therefore, in view of the above problems, the present application provides a heat conducting oil oxidation protection device, which solves the technical problem of serious oxidation of existing heat conducting oil.

[0005] In order to achieve the above object, the present application adopts the following technical scheme: a heat conducting oil oxidation protection device, comprising an oil injection pipeline, an oil storage tank, a boiler, an oil using mechanism group, an oil gas separator, a filter, a circulating pump and an expansion tank, the oil injection pipeline is communicated with the oil storage tank, the lower end of the oil storage tank is communicated with the inlet end of the boiler, the inlet end of the oil using mechanism group is communicated with the outlet end of the boiler, the outlet end of the oil using mechanism group is communicated with the inlet end of the oil gas separator, the first outlet end of the oil gas separator is communicated with the inlet end of the filter, the outlet end of the filter is connected with the inlet end of the circulating pump, the outlet end of the circulating pump is connected with the inlet end of the boiler, a first stop valve is arranged on the oil injection pipeline, a second stop valve is arranged between the oil storage tank and the inlet end of the boiler, a third stop valve is arranged between the circulating pump and the inlet end of the boiler, one end of the expansion tank is communicated with the second outlet end of the oil gas separator, a new oil supply pipeline is communicated with the inlet end of the expansion tank, a fifth stop valve is arranged on the new oil supply pipeline, an overflow pipe is arranged on the expansion tank, the free end of the overflow pipe extends into the oil storage tank and extends below the oil liquid surface of the oil storage tank, an oil communication pipe is arranged on the overflow pipe, the oil communication pipe is connected with the lower end of the expansion tank, a sixth stop valve is arranged on the oil communication pipe, an oil storage exhaust pipe is arranged on the oil storage tank, and an expansion exhaust pipe is arranged on the expansion tank.

[0006] Further, a blowdown pipeline is arranged on the lower end of the oil storage tank, and a seventh stop valve is arranged on the blowdown pipeline.

[0007] Further, a pressure relief pipeline is arranged in parallel on the oil using mechanism group, and a pressure relief valve is arranged on the pressure relief pipeline.

[0008] Further, an eighth stop valve is arranged on the expansion exhaust pipe.

[0009] Further, a sampling pipeline is communicated between the filter and the oil gas separator, the other end of the sampling pipeline is connected to the pipeline between the third stop valve and the circulating pump, a sampling device is arranged on the sampling pipeline, and fourth stop valves are arranged at the front and rear ends of the sampling device on the sampling pipeline.

[0010] Further, a gas filled ball is arranged in the expansion tank, a gas inlet and a gas outlet are connected to the gas filled ball, the gas inlet and the gas outlet extend out of the expansion tank, and the gas inlet and the gas outlet are communicated with external gas lines.

[0011] Further, the gas filled ball is a double-layer structure, and nitrogen is filled in the double-layer structure.

[0012] Further, a flexible pipe body is arranged on the free end of the overflow pipe, and a porous material body is arranged on the outlet end of the flexible pipe body, and the porous material body is immersed in the liquid surface.

[0013] Further, a buoyancy device is arranged on the porous material body, and the buoyancy device ensures that the porous material body is always located 20-50 mm below the liquid surface.

[0014] By adopting the foregoing technical scheme, the beneficial effects of the present application are as follows: in the present scheme, the oil liquid in the oil storage tank is supplied to the boiler for heating, and then provided to the oil using mechanism group, and then flows out to the oil-gas separator for oil-gas separation, and then the oil liquid passes through the filter and the circulating pump to return to the boiler again, forming a cycle. The expansion tank is used to relieve the load of the heater and the pipeline, relieve the temperature fluctuation and the pressure change, and reduce the impact on the pipeline. After the overflow pipe of the expansion tank extends into the oil liquid in the oil storage tank, air can be prevented from entering the expansion tank, and the eighth stop valve arranged on the expansion exhaust pipe also prevents air from entering the expansion tank.

[0015] In addition, the inflatable ball, the inflation inlet, the inflation outlet and the elastic ring piece are all arranged to control the volume change in the expansion tank. The elastic ring piece can achieve passive expansion, the inflation inlet and the inflation outlet can achieve precise and controllable expansion, and the nitrogen gas is arranged to achieve better double-layer effect and reduce heat exchange.

[0016] The oil communication pipe is arranged to make the overflow pipe not only achieve the purpose of backflow, and the gas in the upper part of the expansion tank can enter the oil storage tank through the overflow pipe, and the oil liquid in the oil storage tank is in the intestine, and only a small liquid level difference pressure is needed for the gas to pass through the oil liquid and enter the atmosphere from the liquid exhaust pipe.

[0017] The eighth stop valve on the expansion exhaust pipe can be closed after normal heating, so as to ensure the temperature of the oil liquid in the system during circulation. The eighth stop valve is kept open during heating, so that the air in the pipeline can be effectively discharged during heating.

[0018] The oil storage tank is located at a low position, and the expansion tank is located at a high position. The height difference between the two is usually greater than 1.5 meters, and the preferred difference is between 1.5-2.5 meters.

[0019] The new oil supply pipeline is arranged to prevent the oil liquid in the expansion tank from being too little. Usually, a preferred state is to keep the volume at 1 / 5 to 1 / 2.

[0020] The porous material body can effectively filter impurities, and since the gas in the expansion tank also enters the oil storage tank from the porous material body, the impurities adhering to the porous material body can be removed, so that the porous material body is not blocked. BRIEF DESCRIPTION OF DRAWINGS

[0021] Fig. 1 is a structural schematic diagram of the present application;

[0022] Fig. 2 is a sectional structural schematic diagram of the cooperation of the porous material body and the buoyancy device;

[0023] Fig. 3 is a sectional structural schematic diagram of the inflatable ball body.

[0024] Reference signs:

[0025] 1, oil filling pipeline; 11, first stop valve; 2, oil storage tank; 21, second stop valve; 22, oil storage exhaust pipe; 23, blowdown pipeline; 24, seventh stop valve; 3, boiler; 4, oil using mechanism group; 41, pressure relief pipeline; 42, pressure relief valve; 5, oil-gas separator; 6, filter; 61, sampling pipeline; 62, sampling device; 63, fourth stop valve; 7, circulating pump; 71, third stop valve; 8, expansion tank; 81, new oil supply pipeline; 82, fifth stop valve; 83, overflow pipe; 831, flexible pipe body; 832, porous material body; 833, buoyancy device; 834, through hole; 84, oil communication pipe; 85, sixth stop valve; 86, expansion exhaust pipe; 87, eighth stop valve; 9, inflatable ball body; 91, inflation inlet; 92, inflation outlet; 93, nitrogen; 94, elastic ring piece. DETAILED DESCRIPTION

[0026] The present application will be further described in conjunction with the drawings and specific embodiments.

[0027] Reference Figs. 1 to 3The embodiment provides a heat conducting oil oxidation protection device which comprises an oil injection pipeline 1, an oil storage tank 2, a boiler 3, an oil using mechanism group 4, an oil gas separator 5, a filter 6, a circulating pump 7 and an expansion tank 8, the oil injection pipeline 1 is communicated with the oil storage tank 2, the lower end of the oil storage tank 2 is communicated with the inlet end of the boiler 3, the inlet end of the oil using mechanism group 4 is communicated with the outlet end of the boiler 3, the outlet end of the oil using mechanism group 4 is communicated with the inlet end of the oil gas separator 5, the first outlet end of the oil gas separator 5 is communicated with the inlet end of the filter 6, the outlet end of the filter 6 is connected with the inlet end of the circulating pump 7, the outlet end of the circulating pump 7 is connected with the inlet end of the boiler 3, a first stop valve 11 is arranged on the oil injection pipeline 1, a second stop valve 21 is arranged between the oil storage tank 2 and the inlet end of the boiler 3, a third stop valve 71 is arranged between the circulating pump 7 and the inlet end of the boiler 3, one end of the expansion tank 8 is communicated with the second outlet end of the oil gas separator 5, a new oil supply pipeline 81 is communicated with the inlet end of the expansion tank 8, a fifth stop valve 82 is arranged on the new oil supply pipeline 81, an overflow pipe 83 is arranged on the expansion tank 8, the free end of the overflow pipe 83 extends into the oil storage tank 2 and extends below the oil liquid surface of the oil storage tank 2, an oil communication pipe 84 is arranged on the overflow pipe 83, the oil communication pipe 84 is connected with the lower end of the expansion tank 8, a sixth stop valve 85 is arranged on the oil communication pipe 84, an oil storage exhaust pipe 22 is arranged on the oil storage tank 2, and an expansion exhaust pipe 86 is arranged on the expansion tank 8. A blowdown pipeline 23 is arranged on the lower end of the oil storage tank 2, and a seventh stop valve 24 is arranged on the blowdown pipeline 23. A pressure relief pipeline 41 is arranged in parallel on the oil using mechanism group 4, and a pressure relief valve 42 is arranged on the pressure relief pipeline 41. An eighth stop valve 87 is arranged on the expansion exhaust pipe 86. A sampling pipeline 61 is communicated between the filter 6 and the oil gas separator 5, the other end of the sampling pipeline 61 is connected to the pipeline between the third stop valve 71 and the circulating pump 7, a sampling device 62 is arranged on the sampling pipeline 61, and fourth stop valves 63 are arranged at the front and rear ends of the sampling device 62 on the sampling pipeline 61.

[0028] The oil communication pipe can make the overflow pipe not only achieve the purpose of backflow, and the gas in the upper part of the expansion tank can enter the oil storage tank through the overflow pipe, and the oil liquid in the oil storage tank belongs to the gastrointestinal tract, so that the gas can pass through the oil liquid and enter the atmosphere from the liquid exhaust pipe only by a small liquid level difference pressure.

[0029] The eighth stop valve on the expansion exhaust pipe can be closed after normal heating, so as to ensure the temperature of the oil liquid in the system during circulation. The eighth stop valve is kept open during the heating process, so that the air in the pipeline can be effectively discharged during the heating process.

[0030] The oil tank is located at a low position, and the expansion tank is located at a high position. The height difference between the two is usually greater than 1.5 meters, and the preferred difference is between 1.5-2.5 meters.

[0031] The new oil supply pipeline is arranged to prevent the oil in the expansion tank from being too little, and usually a preferred state is to maintain 1 / 5 to 1 / 2 of the volume.

[0032] The expansion tank 8 is provided with an inflatable ball 9, and the inflatable ball 9 is connected with an inflation inlet 91 and an inflation outlet 92. The inflation inlet 91 and the inflation outlet 92 respectively extend out of the expansion tank 8, and are respectively connected with an external gas path. The inner side of the inflatable ball 9 is provided with an elastic ring 94 for effectively maintaining the expansion of the inflatable ball 9. The inflatable ball 9 has a double-layer structure, and the middle of the double-layer structure is filled with nitrogen 93.

[0033] The free end of the overflow pipe 83 is provided with a flexible pipe body 831, and the outlet end of the flexible pipe body 831 is provided with a porous material body 832, which is immersed in the liquid surface. The porous material body 832 is provided with a buoyancy device 833, which ensures that the porous material body 832 is always located below the liquid surface by 20-50 mm, and the distance between the porous material body 832 and the bottom of the oil tank is greater than 100 mm. The buoyancy device 833 is a floating plate, and a plurality of through holes 834 are formed in the floating plate. The through holes 834 are mainly used for the upward movement of the porous material body 832, but due to the length limitation of the flexible pipe body 831, the upward movement is limited. As long as the oil tank 2 has a certain amount of oil, the porous material body 832 can always be kept below the liquid surface. The porous material body can effectively ensure the filtration of impurities, and the gas in the expansion tank can also enter the oil tank through the porous material body, so that the impurities adhered thereto can be removed, thereby ensuring that the porous material body is not blocked.

[0034] The first stop valve, the second stop valve, the third stop valve, the fourth stop valve, the fifth stop valve, the sixth stop valve, the seventh stop valve, the eighth stop valve and the pressure relief valve are all conventional products in the technical field, and will not be described here. The oil using mechanism group is an oil using device, such as an oil heating device, etc. The devices are connected in parallel, and appropriate switches can be provided. The boiler, the circulating pump, the filter and the oil-gas separator are all conventional products in the technical field.

[0035] In the scheme, the oil in the oil tank is supplied to the boiler for heating, and then provided to the oil using mechanism group, and then flows out to the oil-gas separator for oil-gas separation, and then the oil liquid passes through the filter and the circulating pump to return to the boiler again, forming a cycle. The expansion tank is used to relieve the load of the heater and the pipeline, relieve the temperature fluctuation and the pressure change, and reduce the impact on the pipeline. The overflow pipe of the expansion tank extends into the oil liquid in the oil tank, which can avoid air entering the expansion tank. In addition, the eighth stop valve is arranged on the expansion exhaust pipe to avoid air entering the expansion tank. In addition, the inflatable ball, the inflation inlet, the inflation outlet and the elastic ring piece are arranged to control the volume change in the expansion tank. The elastic ring piece can achieve passive expansion, the inflation inlet and the inflation outlet can achieve precise and controllable expansion, and the nitrogen gas is arranged to achieve better double-layer effect and reduce heat exchange.

[0036] Although the present application is specifically shown and described with reference to the preferred embodiments, it is understood that various changes in form and detail can be made therein without departing from the spirit and scope of the application as defined by the appended claims.

Claims

1. A heat transfer oil oxidation protection device, characterized by: The oil injection pipeline, oil tank, boiler, oil using mechanism group, oil gas separator, filter, circulating pump and expansion tank are communicated, the lower end of the oil tank is communicated with the inlet end of the boiler, the inlet end of the oil using mechanism group is communicated with the outlet end of the boiler, the outlet end of the oil using mechanism group is communicated with the inlet end of the oil gas separator, the first outlet end of the oil gas separator is communicated with the inlet end of the filter, the outlet end of the filter is connected with the inlet end of the circulating pump, the outlet end of the circulating pump is connected with the inlet end of the boiler, the first stop valve is arranged on the oil injection pipeline, the second stop valve is arranged between the oil tank and the inlet end of the boiler, the third stop valve is arranged between the circulating pump and the inlet end of the boiler, one end of the expansion tank is communicated with the second outlet end of the oil gas separator, a new oil supply pipeline is communicated with the inlet end of the expansion tank, the fifth stop valve is arranged on the new oil supply pipeline, an overflow pipe is arranged on the expansion tank, the free end of the overflow pipe extends into the oil tank and extends below the oil surface of the oil tank, an oil communication pipe is arranged on the overflow pipe, the oil communication pipe is connected with the lower end of the expansion tank, the sixth stop valve is arranged on the oil communication pipe, an oil storage exhaust pipe is arranged on the oil tank, an expansion exhaust pipe is arranged on the expansion tank. The expansion tank is provided with a gas-filled ball, the gas-filled ball is connected with a gas inlet and a gas outlet, the gas inlet and the gas outlet extend out of the expansion tank, and the gas inlet and the gas outlet are respectively communicated with external gas lines. The gas-filled ball is a double-layer structure, and nitrogen is filled in the double-layer structure. Elastic ring pieces are arranged on the inner side of the gas-filled ball, which are used for effectively maintaining the expansion of the gas-filled ball.

2. A heat transfer oil oxidation protection device according to claim 1, characterized in that: A blowdown pipeline is arranged on the lower end of the oil tank, and a seventh stop valve is arranged on the blowdown pipeline.

3. A heat transfer oil oxidation protection device according to claim 1, characterized in that: A pressure relief pipeline is arranged in parallel on the oil using mechanism group, and a pressure relief valve is arranged on the pressure relief pipeline.

4. The heat transfer oil oxidation protection device of claim 1, wherein: An eighth stop valve is arranged on the expansion exhaust pipe.

5. The heat transfer oil oxidation protection device of claim 1, wherein: A sampling pipeline is communicated between the filter and the oil gas separator, the other end of the sampling pipeline is connected to the pipeline between the third stop valve and the circulating pump, a sampling device is arranged on the sampling pipeline, and fourth stop valves are arranged at the front and rear ends of the sampling device on the sampling pipeline.

6. A heat transfer oil oxidation protection device according to claim 1, characterized in that: A flexible pipe body is arranged on the free end of the overflow pipe, a porous material body is arranged on the outlet end of the flexible pipe body, and the porous material body is immersed in the liquid surface.

7. A heat transfer oil oxidation protection device according to claim 6, characterised in that: A buoyancy device is arranged on the porous material body, and the buoyancy device ensures that the porous material body is always located below the liquid surface by 20-50 mm.

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