Conduction oil heating system

Abstract

The utility model discloses a conduction oil heating system which comprises a heating unit, an expansion tank unit, a heat utilization device and a low-position oil storage tank, the expansion tank unit is communicated with the upper position of the heating unit, and the output end of the heating unit is communicated with the input end of the heat utilization device through an oil supply pipe. The output end of the heat utilization device is communicated with the input end of the heating unit through an oil return pipe, the low-position oil storage tank is communicated with an oil supply pipe, an oil supplementing pipe is communicated between the oil supply pipe and the oil return pipe, an oil supplementing control valve is communicated with the oil supplementing pipe, and the input end and the output end of the heat utilization device are both communicated with heat utilization control valves. By arranging the low-level oil storage tank in the system, when the temperature of heat conduction oil in the system is detected to be too high and the heat conduction oil is insufficient, heat utilization control valves at the input end and the output end of heat utilization equipment can be closed, meanwhile, an oil supplementing control valve on an oil supplementing pipe is opened, and the low-temperature heat conduction oil in the low-level oil storage tank is added into the system; the purpose of reducing the temperature of heat-conducting oil in the system is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of electric heating, in particular to a thermal oil heating system. Background Art

[0002] An electric heating thermal oil circulation system refers to a system in which the heat transfer oil is continuously transferred from the heat source to the equipment that needs to be heated through an external force such as a high-temperature heat pump, and then circulated back to the heating system, thus forming a relatively complete and independent circulation system. Due to its good sealing performance, it can play a very good energy-saving role compared to other commonly used heating methods in industry, so it is widely used in the field of thermal oil heating. The prior art with patent number CN114508855A discloses an electric thermal oil furnace system that can achieve wide-range adjustment of output power. By setting up two electric heaters and two thermal oil pumps, combined with the use of valves between the various devices, the optional operating modes of the electric thermal oil furnace system can be greatly increased. However, when the thermal oil is running in parallel with two pumps, it is easy for the temperature of the thermal oil to rise too high. Once the system leaks or encounters an open flame, it is easy to cause a fire, posing a major safety hazard. Summary of the Invention

[0003] The present invention aims to solve at least one of the above-mentioned technical problems and provides a thermal oil heating system, which can replenish low-temperature thermal oil into the system in time through a low-level oil storage tank to prevent the thermal oil temperature from being too high.

[0004] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0005] A thermal oil heating system comprises a heating unit, an expansion tank unit, a heat-using device and a low-level oil storage tank, wherein the expansion tank unit is connected at a position above the heating unit, the output end of the heating unit is connected to the input end of the heat-using device through an oil supply pipe, the output end of the heat-using device is connected to the input end of the heating unit through an oil return pipe, the low-level oil storage tank is connected to the oil supply pipe, an oil replenishment pipe is connected between the oil supply pipe and the oil return pipe, an oil replenishment control valve is connected to the oil replenishment pipe, and the input and output ends of the heat-using device are both connected to the heat-using control valve.

[0006] As an improvement to the above technical solution, the output end of the low-level oil storage tank is connected to a first control valve and a first safety valve.

[0007] As an improvement of the above technical solution, the heating unit includes an oil-gas separator, a circulation pump module and an organic heat carrier furnace. The oil-gas separator is connected to the expansion tank unit through an expansion pipe. The oil outlet end of the oil-gas separator is connected to the input end of the circulation pump module. The output end of the circulation pump module is connected to the input end of the organic heat carrier furnace. The output end of the organic heat carrier furnace is connected to the oil supply pipe.

[0008] As an improvement of the above technical solution, the circulation pump module includes a circulation pump, and two groups of the circulation pumps are respectively arranged in parallel between the oil outlet end of the oil-gas separator and the input end of the organic heat carrier furnace through circulation pipes. All the circulation pipes are connected to a Y-type filter at the position of the circulation pump input end.

[0009] As an improvement of the above technical solution, all the circulation pipes are connected to a second control valve at both ends of the circulation pump.

[0010] As an improvement of the above technical solution, the expansion tank unit includes an expansion tank and an overflow oil tank, the oil-gas separator is connected to the expansion tank through an expansion pipe, and the expansion tank is connected to the overflow oil tank through an overflow pipe.

[0011] As an improvement to the above technical solution, a liquid level gauge is provided on the expansion tank.

[0012] As an improvement to the above technical solution, a pressure gauge and a temperature gauge are provided on the oil supply pipe.

[0013] As an improvement to the above technical solution, a second safety valve is provided on the input end of the two groups of circulating pumps.

[0014] Compared with the prior art, the beneficial effects of this application are:

[0015] The utility model provides a thermal oil heating system, which provides a low-level oil storage tank in the system. When it is detected that the temperature of the thermal oil inside the system is too high or the thermal oil is insufficient, the heat control valves on the input and output ends of the heat-using equipment can be closed, and the oil supply control valve on the oil supply pipe can be opened at the same time to add the low-temperature thermal oil in the low-level oil storage tank into the system, so as to achieve the purpose of lowering the temperature of the thermal oil inside the system without affecting the operation of the heat-using equipment and the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The following is a further detailed description of the specific embodiments of the present invention with reference to the accompanying drawings, wherein:

[0017] Figure 1 This is a schematic diagram of the system structure of an embodiment of the utility model;

[0018] Figure 2 This is a schematic diagram of part of the structure of the system in the embodiment of the utility model Figure 1 ;

[0019] Figure 3 This is a schematic diagram of part of the structure of the system in the embodiment of the utility model Figure 2 . DETAILED DESCRIPTION

[0020] 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 embodiments described 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 making creative efforts are within the scope of protection of the present invention.

[0021] It should be noted that when a component is referred to as being "fixed to" another component, it may be directly on the other component or there may also be a central component. When a component is considered to be "connected" to another component, it may be directly connected to the other component or there may also be a central component. When a component is considered to be "set on" another component, it may be directly set on the other component or there may also be a central component. When a component is referred to as being "set in the middle", it does not only mean being set in the exact middle position, but also means being within the range defined by the middle as long as both ends are not set. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0022] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this invention pertains. The terms used herein in the specification of this invention are for the purpose of describing specific embodiments only and are not intended to limit the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0023] like Figures 1 to 3 As shown, the present invention provides a thermal oil heating system, comprising a heating unit 10, an expansion tank unit 20, a heat-using device 30, and a low-level oil storage tank 40. The expansion tank unit 20 is connected to a position above the heating unit 10. The output end of the heating unit 10 is connected to the input end of the heat-using device 30 via an oil supply pipe 11. The output end of the heat-using device 30 is connected to the input end of the heating unit 10 via an oil return pipe 31. The low-level oil storage tank 40 is connected to the oil supply pipe 11. An oil replenishment pipe 41 is connected between the oil supply pipe 11 and the oil return pipe 31. The oil replenishment pipe 41 is connected to an oil replenishment control valve 42. The heat-using control valve 32 is connected to both the input and output ends of the heat-using device 30. The low-level oil storage tank 40 is located at a low position in the system, separated from the heating unit 10 by a firewall, and the oil storage tank 40 is at a low liquid level during normal operation. Furthermore, a pressure gauge and a temperature gauge are provided on the oil supply pipe 11. The output end of the low-level oil storage tank 40 is connected to a first control valve 43 and a first safety valve 44 so as to control the output state of the low-level oil storage tank 40 and safely adjust the pressure inside the low-level oil storage tank 40 .

[0024] In a specific embodiment of the present application, the heating unit 10 includes an oil-gas separator 12, a circulation pump module, and an organic heat carrier furnace 13. The oil-gas separator 11 is connected to the expansion tank unit 20 via an expansion tube 14. The oil outlet of the oil-gas separator 12 is connected to the input of the circulation pump module, and the output of the circulation pump module is connected to the input of the organic heat carrier furnace 13. The output of the organic heat carrier furnace 13 is connected to the oil supply pipe 12. The organic heat carrier furnace 13 is a thermal oil furnace, which is used to heat thermal oil and transport the thermal oil to the heat-consuming equipment 30 via the circulation pump module. The oil-gas separator 12 is used to separate bubbles generated during the circulation of the thermal oil and discharge them to the expansion tank unit 20 via the expansion tube 14.

[0025] See Figure 2 The circulation pump module includes two circulating pumps 15, each connected in parallel via a circulation pipe 16 between the oil outlet of the oil-gas separator 12 and the input of the organic heat transfer furnace 13. Each of the circulating pipes 16 is connected to a Y-type filter 17 at the input of the circulating pumps 15. This arrangement allows for the use of two circulating pumps 15 in parallel, enabling single or dual pump operation to be adjusted to achieve varying thermal oil flow rates. The Y-type filter 17, a conventional technology, is installed at the input of the circulating pumps 15 to remove impurities from the thermal oil. Furthermore, each of the circulating pipes 16, located at both ends of the circulating pumps 15, is connected to a second control valve 18. A second safety valve 19 is installed at the input of both circulating pumps 15 to enhance safety.

[0026] Furthermore, the expansion tank unit 20 includes an expansion tank 21 and an overflow oil tank 22. The oil-gas separator 12 is connected to the expansion tank 21 via an expansion pipe 14, and the expansion tank 21 is connected to the overflow oil tank 22 via an overflow pipe 23. The bubbles separated by the oil-gas separator 12 are discharged into the expansion tank 21. A liquid level gauge 24 is provided on the expansion tank 21.

[0027] The utility model provides a thermal oil heating system, which provides a low-level oil storage tank 40 in the system. When it is detected that the temperature of the thermal oil inside the system is too high or the thermal oil is insufficient, the heat control valve 32 on the input and output ends of the heat-using device 30 can be closed, and the oil replenishment control valve 42 on the oil replenishment pipe can be opened at the same time to add the thermal oil in the low-level oil storage tank 40 into the system, so as to achieve the purpose of lowering the temperature of the thermal oil inside the system without affecting the operation of the heat-using device 30 and the system.

[0028] The above embodiments are only used to illustrate the technical solution of the present invention and are not intended to limit the present invention. Any modification or equivalent replacement that does not depart from the spirit and scope of the present invention shall be included in the scope of the technical solution of the present invention.

Claims

1. A thermal oil heating system, characterized in that: It includes a heating unit, an expansion tank unit, a heat-using device and a low-level oil storage tank. The expansion tank unit is connected to a position above the heating unit. The output end of the heating unit is connected to the input end of the heat-using device through an oil supply pipe. The output end of the heat-using device is connected to the input end of the heating unit through an oil return pipe. The low-level oil storage tank is connected to the oil supply pipe. An oil replenishment pipe is connected between the oil supply pipe and the oil return pipe. An oil replenishment control valve is connected to the oil replenishment pipe. The input and output ends of the heat-using device are both connected to the heat control valve.

2. A thermal oil heating system according to claim 1, characterized in that: The output end of the low-level oil storage tank is connected to a first control valve and a first safety valve.

3. A thermal oil heating system according to claim 2, characterized in that: The heating unit includes an oil-gas separator, a circulation pump module and an organic heat carrier furnace. The oil-gas separator is connected to the expansion tank unit through an expansion pipe. The oil outlet end of the oil-gas separator is connected to the input end of the circulation pump module. The output end of the circulation pump module is connected to the input end of the organic heat carrier furnace. The output end of the organic heat carrier furnace is connected to the oil supply pipe.

4. A thermal oil heating system according to claim 3, characterized in that: The circulation pump module includes a circulation pump. Two groups of the circulation pumps are respectively arranged in parallel between the oil outlet end of the oil-gas separator and the input end of the organic heat carrier furnace through circulation pipes. All the circulation pipes are connected to a Y-type filter at the position of the circulation pump input end.

5. A thermal oil heating system according to claim 4, characterized in that: All the circulation pipes are connected to the second control valve at the positions at both ends of the circulation pump.

6. The thermal oil heating system according to claim 3, characterized in that: The expansion tank unit includes an expansion tank and an overflow oil tank. The oil-gas separator is connected to the expansion tank through an expansion pipe, and the expansion tank is connected to the overflow oil tank through an overflow pipe.

7. A thermal oil heating system according to claim 6, characterized in that: A liquid level gauge is provided on the expansion tank.

8. The thermal oil heating system according to claim 1, characterized in that: The oil supply pipe is provided with a pressure gauge and a temperature gauge.

9. The thermal oil heating system according to claim 4, characterized in that: A second safety valve is provided on the input ends of the two groups of circulating pumps.

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