Assembly for reducing energy consumption of heat conduction oil system
By employing components operating with large temperature difference and small flow rate, and heat-using equipment with small temperature difference and large flow rate in the heat transfer oil system, combined with a second circulation pump controlled by frequency converter, the problem of high energy consumption in the heat transfer oil system was solved, and system stability and energy consumption were reduced.
Patent Information
- Application Number
- CN202423138877.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-19
- Publication Date
- 2025-12-02
- Estimated Expiration
- 2034-12-19
AI Technical Summary
The heat supply in the thermal oil system is not fully utilized, the small temperature difference in the boiler leads to increased energy consumption, and multiple devices need to be operated, resulting in wasted electricity.
The heat transfer oil system components operate with a large temperature difference and a small flow rate. Combined with the design of heat-using equipment with a small temperature difference and a large flow rate, the flow rate and head are adjusted by using a second circulation pump controlled by a variable frequency, thereby reducing the number of heat sources and the power of the circulation pump.
It improves the stability of system operation and the heating quality of heat-using equipment, reduces power consumption, reduces the number of heat sources used, and achieves the energy-saving effect of the heat transfer oil system.
Smart Images
Figure CN223623138U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of heat transfer oil circulation systems, and in particular relates to a component for reducing the energy consumption of heat transfer oil systems. Background Technology
[0002] Thermal oil systems offer strong heating capacity, high heating temperatures, and low operating pressures. They are widely used in industrial production.
[0003] However, currently, the heating capacity of the boilers is generally not fully utilized. The thermal oil boilers operate with a small temperature difference, with the temperature difference between the inlet and outlet of the thermal oil being only about 12℃-15℃. The designed inlet and outlet temperature difference for the thermal oil in boilers is typically around 25℃-30℃. As a result, the boiler's heating load is not fully utilized during normal operation. The actual output of the boiler is only about 50% of its rated output, requiring an additional boiler to be operated to meet production demands. This increases the power consumption of the main circulating pump and burners, thus increasing energy consumption. Utility Model Content
[0004] The main technical problem solved by this utility model is to provide a component that reduces the energy consumption of a heat transfer oil system. The component adopts a large temperature difference and small flow rate operation for the heat transfer oil system, heat source and main circulation system, and a small temperature difference and large flow rate operation for the heat-using equipment. After use, it can greatly increase the operational stability of the system, improve the heating quality of the heat-using equipment, improve the product efficiency of the heat-using equipment, reduce the number of heat sources used, reduce power consumption, and achieve the energy-saving purpose of the heat transfer oil system.
[0005] To solve the above-mentioned technical problems, the present invention provides a component for reducing the energy consumption of a heat transfer oil system, including a heat source, a burner, heat-using equipment, a circulating pump, pipelines, valves, and a circulation assembly. The burner is connected to the heat source. The heat-using equipment includes a first heat-using device and a second heat-using device. The circulating pump includes a first circulating pump. The pipeline includes a boiler outlet pipe, a boiler inlet pipe, a main oil supply pipe, a main oil return pipe, a bypass pipe, a first oil inlet pipe, a first oil outlet pipe, a second oil inlet pipe, and a second oil outlet pipe. The valves include a boiler outlet valve, a bypass valve, a first oil inlet valve, a first oil outlet valve, a second oil inlet valve, a second oil outlet valve, a circulating pump inlet valve, and a circulating pump outlet valve. The output end of the heat source is connected to a boiler outlet with a boiler outlet valve. The boiler inlet pipe is connected to the main oil supply pipe. A circulating pump inlet valve, a first circulating pump, and a circulating pump outlet valve are sequentially connected to the boiler inlet pipe. One end of the boiler inlet pipe is connected to the input end of the heat source, and the other end is connected to the main oil return pipe. A bypass valve is installed on the bypass pipe and connected to the main oil supply pipe and the main oil return pipe. The input end of the first heat-using equipment is connected to the main oil supply pipe through a first oil inlet pipe connected to a first oil inlet valve, and the output end is connected to the main oil return pipe through a first oil outlet pipe connected to a first oil outlet valve. The input end of the second heat-using equipment is connected to the main oil supply pipe through a second oil inlet pipe connected to a second oil inlet valve, and the output end is connected to the main oil return pipe through a second oil outlet pipe connected to a second oil outlet valve. A circulation assembly is connected between the first oil outlet pipe and the second oil inlet pipe.
[0006] In a preferred embodiment of the present invention, the circulation assembly includes a third oil inlet pipe, a third oil inlet valve, a fourth oil inlet pipe, a fourth oil inlet valve, a fifth oil inlet pipe, a fifth oil inlet valve, a second circulation pump, a third oil outlet pipe, and a third oil outlet valve.
[0007] In a preferred embodiment of this utility model, a third oil inlet valve is connected to the third oil inlet pipe, one end of the third oil inlet pipe is connected to the first oil outlet pipe, a fourth oil inlet valve is connected to the fourth oil inlet pipe, one end of the fourth oil inlet pipe is connected to the main oil supply pipe, the other ends of the third and fourth oil inlet pipes are connected to one end of the fifth oil inlet pipe, a fifth oil inlet valve is connected to the fifth oil inlet pipe, the other end of the fifth oil inlet pipe is connected to the input end of the second circulation pump, and the output end of the second circulation pump is connected to the second oil inlet pipe through the third oil outlet pipe connected to the third oil outlet valve.
[0008] In a preferred embodiment of this invention, the power of the second circulating pump is less than that of the first circulating pump.
[0009] In a preferred embodiment of this utility model, a frequency converter is provided on the second circulating pump.
[0010] The beneficial effects of this utility model are as follows: This utility model discloses a component for reducing the energy consumption of a heat transfer oil system. It adopts a large temperature difference and small flow rate operation for the heat transfer oil system, heat source and main circulation system, and a small temperature difference and large flow rate operation for the heat-using equipment. After use, it can greatly increase the operational stability of the system, improve the heating quality of the heat-using equipment, improve the product efficiency of the heat-using equipment, reduce the number of heat sources used, reduce power consumption, and achieve the energy-saving purpose of the heat transfer oil system. Attached Figure Description
[0011] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort, wherein:
[0012] Figure 1 This is a schematic diagram of a preferred embodiment of a component for reducing energy consumption in a heat transfer oil system according to the present invention. Detailed Implementation
[0013] The technical solutions in the embodiments of this utility model will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.
[0014] Please see Figure 1 As shown, the embodiments of this utility model include:
[0015] A component for reducing energy consumption in a heat transfer oil system includes a heat source 1, a burner 2, heat-using equipment, a circulating pump, pipelines, valves, and a circulation component.
[0016] The burner 2 is connected to the heat source 1.
[0017] The heat-using equipment includes a first heat-using device 3 and a second heat-using device 4.
[0018] The circulating pump includes a first circulating pump 5.
[0019] The pipeline includes a boiler outlet pipe 6, a boiler inlet pipe 7, a main oil supply pipe 8, a main oil return pipe 9, a bypass pipe 10, a first oil inlet pipe 11, a first oil outlet pipe 12, a second oil inlet pipe 13, and a second oil outlet pipe 14.
[0020] The valves include a boiler outlet valve 15, a bypass valve 16, a first oil inlet valve 17, a first oil outlet valve 18, a second oil inlet valve 19, a second oil outlet valve 20, a circulating pump inlet valve 21, and a circulating pump outlet valve 22.
[0021] The output end of the heat source 1 is connected to the boiler outlet pipe 6 with a boiler outlet valve 15 and the oil supply main pipe 8. The boiler inlet pipe 7 is sequentially connected to the circulation pump inlet valve 21, the first circulation pump 5 and the circulation pump outlet valve 22. One end of the boiler inlet pipe 7 is connected to the input end of the heat source 1 and the other end is connected to the return oil main pipe 9. The bypass pipe 10 is equipped with a bypass valve 16 and is connected to the oil supply main pipe 8 and the return oil main pipe 9. The input end of the first heat-using device 3 is connected to the oil supply main pipe 8 through the first oil inlet pipe 11 with the first oil inlet valve 17, and the output end is connected to the return oil main pipe 9 through the first oil outlet pipe 12 with the first oil outlet valve 18. The input end of the second heat-using device 4 is connected to the oil supply main pipe 8 through the second oil inlet pipe 13 with the second oil inlet valve 19, and the output end is connected to the return oil main pipe 9 through the second oil outlet pipe 14 with the second oil outlet valve 20.
[0022] This structure eliminates one heat source 1 compared to the original technical solution. Heat source 1 is a boiler, which operates with a large temperature difference, fully utilizing its output and increasing the heating capacity of the main circulation pipe. Reducing the number of operating boiler units lowers the power consumption of the circulation pump and burner 2, thereby saving energy.
[0023] Unlike the original technical solution, in this application, a circulation assembly is connected between the first oil outlet pipe 12 and the second oil inlet pipe 13. The heat-using equipment operates with a small temperature difference through the circulation assembly, improving heating stability and ensuring the pass rate of the produced products.
[0024] The circulation assembly includes a third oil inlet pipe 23, a third oil inlet valve 24, a fourth oil inlet pipe 25, a fourth oil inlet valve 26, a fifth oil inlet pipe 27, a fifth oil inlet valve 28, a second circulation pump 29, a third oil outlet pipe 30, and a third oil outlet valve 31.
[0025] A third oil inlet valve 24 is connected to the third oil inlet pipe 23. One end of the third oil inlet pipe 23 is connected to the first oil outlet pipe 12. A fourth oil inlet valve 26 is connected to the fourth oil inlet pipe 25. One end of the fourth oil inlet pipe 25 is connected to the main oil supply pipe 8. The other ends of the third oil inlet pipe 23 and the fourth oil inlet pipe 25 are connected to one end of the fifth oil inlet pipe 27. A fifth oil inlet valve 28 is connected to the fifth oil inlet pipe 27. The other end of the fifth oil inlet pipe 27 is connected to the input end of the second circulation pump 29. The output end of the second circulation pump 29 is connected to the second oil inlet pipe 13 through the third oil outlet pipe 30 connected to the third oil outlet valve 31.
[0026] The power of the second circulating pump 29 is less than that of the first circulating pump 5. The second circulating pump 29 is equipped with a frequency converter, which allows for real-time adjustment of its head and flow rate. The replenishment of high-temperature heat transfer oil is also adjusted in real-time via the fourth oil inlet valve 26, ensuring sufficient heat supply for the normal operation of the second heat-using equipment 4. This ensures that the head of the second circulating pump 29 just overcomes the inherent resistance of the second heat-using equipment 4. This improves the heat utilization stability of the second heat-using equipment 4, reduces the flow rate and head of the second circulating pump 29, lowers its power consumption, and saves electricity.
[0027] In the original technical solution, heat source 1 was set to 2 units (of course, 3, 4, 5 units, etc. are also possible), with a rated supply capacity of N = 6 million kcal and Q = 400m³. 3 / h, circulating pump Q=400m 3 / h, H=0.45MPa, N=110KW, burner 2N=45KW. Two heat-using devices, each with a heat load of N=2.12 million kcal and Q=300m³ / h. 3 / h.
[0028] The maximum allowable operating temperature of the heat transfer oil is set to 280℃.
[0029] Because the heat-using equipment operates with a small temperature difference, the inlet temperature of heat-using equipment #1 and #2 is 270℃ and the outlet temperature is 255℃, with a temperature difference of only 15℃ (assuming 15℃, possibly 12℃-16℃).
[0030] Because the outlet temperature of the heat transfer oil after passing through the heat-using equipment is too high (255℃), the heat of the heat transfer oil is not fully utilized at the same flow rate. After the return oil is heated by heat source 1, it can only be heated to 270℃-280℃ due to the limitation of the maximum temperature of the heat transfer oil, resulting in insufficient output of heat source 1. Since the power of the circulating pump and the power of burner 2 are fixed, heat source 1 uses the same amount of electricity but only provides about 30%-40% of the heat supply. This is a significant waste of electricity.
[0031] The improved version of this application adopts a combined energy-saving system consisting of a heat transfer oil heat source 1, a main pipe operating with a large temperature difference, and a heat-using equipment operating with a small temperature difference.
[0032] For ease of analysis, relevant parameters are set according to actual conditions, and the resistance of corresponding branch pipes and valves is ignored. The resistance of main pipelines, heat source 1, and heat-using equipment are marked on the diagram. This serves as the basis for qualitative analysis.
[0033] After being pressurized by the first circulating pump 5, the heat transfer oil passes through heat source 1 at a pressure value that is artificially set to an usable pressure of H = 0.35 MPa after pressure drop, with a pressure loss of 0.05 MPa through the pipeline. Therefore, the pressure head entering the first heat-using equipment 3 is 0.3 MPa, and Q = 300 m. 3 / h, the pressure loss of the first heat-using equipment 3 is 0.15MPa, and the heat consumption is 2.12 million kcal.
[0034] The first heat-using equipment 3 has an oil outlet pressure of 0.14 MPa and an oil outlet temperature of 255℃. The extracted portion of the oil has an output pressure of Q = 250 m³. 3 / h, and a portion of the oil supply from the main oil supply pipe 8 at 270℃, Q=52m 3 / h, directly pumped into the second heat-using equipment 4 through the second circulation pump 29.
[0035] The second circulating pump 29 adopts frequency conversion control, which can adjust the head and flow rate at any time to meet the heat consumption requirement of 2.12 million kcal for the second heat-using equipment 4.
[0036] Since the pressure head of the second circulating pump 29 only needs to overcome the resistance of the second heat-using equipment 4, the flow rate and head are very small. The power of the motor used is also much smaller. The third oil inlet valve 24 and the fourth oil inlet valve 26 can meet the oil supply to the second circulating pump 29 by adjusting their opening degree. The valves can be manually or automatically controlled.
[0037] This reduces the power consumption from the original two heat sources to just one, thus saving the power of the burner 2 and the first circulation pump 5 of heat source 1. Actual calculations show that this can essentially save the electrical power of one first circulation pump 5.
[0038] The comparison shows that the main piping system operates with a large temperature difference and a small flow rate, while the heat-using equipment operates with a small temperature difference and a large flow rate.
[0039] It can reduce the supply and return flow of oil in the main oil supply pipe 8 and the main oil return pipe 9, greatly increasing the heating load under the same flow rate. The capacity of heat source 1 and the first circulation pump 5 can be fully utilized, which can increase the heating load, meet the heating requirements, and has a large margin.
[0040] The heat-using equipment operates with a small temperature difference and a large flow rate, which improves the hydraulic stability of the entire heat transfer oil system. Furthermore, the high and low temperature oil inlet flow rate of the second circulation pump 29 can be adjusted according to the actual heat load and actual heat application temperature.
[0041] The second circulating pump 29 adopts frequency conversion control to ensure the pressure and flow rate of the second heat-using equipment 4 at all times, so as to meet the heat load of the equipment, and the hydraulic stability of the system is better.
[0042] In summary, the component for reducing energy consumption of a heat transfer oil system disclosed in this utility model adopts a technical solution and component that uses a large temperature difference and small flow rate for the heat transfer oil system, heat source and main circulation system, and a small temperature difference and large flow rate for the heat-using equipment. After use, it can greatly increase the operational stability of the system, improve the heating quality of the heat-using equipment, improve the product efficiency of the heat-using equipment, reduce the number of heat sources used, reduce power consumption, and achieve the energy-saving purpose of the heat transfer oil system.
[0043] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made using the content of this utility model specification, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.
Claims
1. A component for reducing energy consumption in a heat transfer oil system, characterized in that, The system includes a heat source, burner, heat-using equipment, circulating pump, pipelines, valves, and circulation components. The burner is connected to the heat source. The heat-using equipment includes a first heat-using device and a second heat-using device. The circulating pump includes a first circulating pump. The pipeline includes a boiler outlet pipe, a boiler inlet pipe, a main oil supply pipe, a main oil return pipe, a bypass pipe, a first oil inlet pipe, a first oil outlet pipe, a second oil inlet pipe, and a second oil outlet pipe. The valves include a boiler outlet valve, a bypass valve, a first oil inlet valve, a first oil outlet valve, a second oil inlet valve, a second oil outlet valve, a circulating pump inlet valve, and a circulating pump outlet valve. The output end of the heat source is connected to the boiler outlet pipe with a boiler outlet valve and connected to the main oil supply pipe. Circulating pump components are sequentially connected to the boiler inlet pipe. The system includes a circulating pump inlet valve, a first circulating pump, and a circulating pump outlet valve. One end of the boiler inlet pipe is connected to the input end of the heat source, and the other end is connected to the return oil main pipe. A bypass valve is installed on the bypass pipe and connected to the supply oil main pipe and the return oil main pipe. The input end of the first heat-using equipment is connected to the supply oil main pipe through a first oil inlet pipe connected to a first oil inlet valve, and the output end is connected to the return oil main pipe through a first oil outlet pipe connected to a first oil outlet valve. The input end of the second heat-using equipment is connected to the supply oil main pipe through a second oil inlet pipe connected to a second oil inlet valve, and the output end is connected to the return oil main pipe through a second oil outlet pipe connected to a second oil outlet valve. A circulation assembly is connected between the first oil outlet pipe and the second oil inlet pipe.
2. The component for reducing energy consumption of a heat transfer oil system according to claim 1, characterized in that, The circulation assembly includes a third oil inlet pipe, a third oil inlet valve, a fourth oil inlet pipe, a fourth oil inlet valve, a fifth oil inlet pipe, a fifth oil inlet valve, a second circulation pump, a third oil outlet pipe, and a third oil outlet valve.
3. The component for reducing energy consumption of a heat transfer oil system according to claim 2, characterized in that, A third oil inlet valve is connected to the third oil inlet pipe. One end of the third oil inlet pipe is connected to the first oil outlet pipe. A fourth oil inlet valve is connected to the fourth oil inlet pipe. One end of the fourth oil inlet pipe is connected to the main oil supply pipe. The other ends of the third and fourth oil inlet pipes are connected to one end of the fifth oil inlet pipe. A fifth oil inlet valve is connected to the fifth oil inlet pipe. The other end of the fifth oil inlet pipe is connected to the input end of the second circulation pump. The output end of the second circulation pump is connected to the second oil inlet pipe through the third oil outlet pipe connected to the third oil outlet valve.
4. The component for reducing energy consumption of a heat transfer oil system according to claim 3, characterized in that, The power of the second circulating pump is less than that of the first circulating pump.
5. The component for reducing energy consumption of a heat transfer oil system according to claim 3, characterized in that, The second circulating pump is equipped with a frequency converter.