Conduction oil heat supply system
By designing the thermal oil heating system, combined with the main circulation system and the low-temperature heating system, the demand for high- and low-temperature heating in the production of waterproof materials is solved, saving energy and reducing consumption and improving production convenience.
Patent Information
- Application Number
- CN202310876126.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2023-07-18
- Publication Date
- 2025-01-21
AI Technical Summary
During the production process of existing waterproof materials, it is necessary to provide heat supply of high and low temperature thermal oils at the same time, resulting in inconvenient production and high economic costs.
A thermal oil heating system is designed, which combines the main circulation system and the low-temperature heating system, uses natural pressure and circulation pumps to achieve high- and low-temperature heating, and installs a flue gas waste heat recovery device on the heating furnace to save energy and reduce costs. Consumption.
It achieves the provision of two different heating temperatures in the lowest cost form, saving energy, reducing pollution emissions, and improving the convenience and economy of production.
Smart Images
Figure CN119333970A_ABST
Abstract
Description
Technical Field
[0001] The invention belongs to the field of waterproof material production, and in particular relates to a heating technology in the waterproof material production process. Background Art
[0002] The production of waterproof coatings or waterproof membranes requires the use of heat transfer oil to heat asphalt and modified asphalt. The heating temperature of heat transfer oil is usually around 240°C. At the same time, because asphalt and modified asphalt are solid or gel at room temperature, they need to be heated to a certain temperature during storage or pipeline transportation to reduce their viscosity or melt them into liquid before they can be smoothly transported to avoid condensation in the equipment. The heating temperature of the pipeline for transporting raw materials should not be too high, generally 120°C, just enough to maintain the fluidity of asphalt to avoid excessive energy consumption. Therefore, two different temperatures of high temperature of about 240°C and low temperature of 120°C are required in production. In the previous production process, they were first heated to high temperature and then lowered to low temperature, or two different sets of heating furnace equipment were used to provide different temperatures, which was inconvenient and uneconomical. Summary of the invention
[0003] The object of the present invention is to overcome the above-mentioned deficiencies of the prior art and to provide a heat supply system of thermal oil, which can provide two different heating temperatures in a form of lowest cost.
[0004] To achieve the above object, the present invention adopts the following technical solutions:
[0005] A heat transfer oil heating system comprises an oil injection and discharge system, a main circulation system and a low-temperature heating system connected by pipelines. The main circulation system and the low-temperature heating system are respectively connected to heat-using equipment requiring different heating temperatures.
[0006] The oil filling and draining system comprises a connected oil storage tank, an expansion tank and an oil filling pump, wherein the expansion tank is installed at the highest position of the system and the oil storage tank is installed at the lowest position of the system;
[0007] The expansion tank is connected to the oil storage tank via an oil filling pipe and an overflow pipe. The upper end of the oil filling pipe is connected to the expansion tank, one of the branches at the lower end is connected to the external oil filling port through an oil filling pump and an oil filter, and the other branch at the lower end is connected to the oil storage tank; the oil filling pipe is also connected to an oil row pipe, and the bottom of the expansion tank is connected to an expansion pipe, and the expansion pipe is connected to the main circulation system via an oil-gas separator.
[0008] The main circulation system includes a heating furnace, a circulation pump connected to the front end of the heating furnace inlet, an oil supply pipe connected to the outlet end of the main circulation system, and an oil return pipe connected to the inlet end of the main circulation system. The outlets of the return oil pipe and the oil supply pipe are connected to a heating device, and the other end is connected to an oil-gas separator. A Y-type oil filter is also connected to the front end entering the circulation pump.
[0009] The low-temperature heating system includes a low-temperature oil supply pipe connected to the oil supply pipe, a low-temperature oil return pipe connected to the oil return pipe, an electric three-way valve installed on the low-temperature oil supply pipe and the low-temperature oil return pipe, and a secondary circulation pump installed on the low-temperature oil supply pipe. The other ends of the low-temperature oil supply pipe and the low-temperature oil return pipe are connected to a heating device.
[0010] After adopting the above technical scheme, the present invention has the following advantages compared with the background technology: in addition to providing high-temperature heat transfer oil through the main circulation system, the system can also provide low-temperature heat transfer oil through the low-temperature heating system, while meeting different heating temperature requirements, and a flue gas waste heat recovery device is also provided in the heating furnace, which can recycle the waste heat of combustion, thereby saving energy and reducing emission pollution. BRIEF DESCRIPTION OF THE DRAWINGS
[0011] Figure 1 It is a schematic diagram of the overall structure of the present invention;
[0012] Figure 2 It is a schematic diagram of the low temperature heating part of the present invention; DETAILED DESCRIPTION
[0013] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.
[0014] Example
[0015] See also Figure 1 As shown, the present invention discloses a heat supply system of heat transfer oil, including an oil injection and discharge system, a main circulation system and a low-temperature heating system connected by pipelines.
[0016] The oil filling and draining system includes a connected oil storage tank 11, an expansion tank 12, and an oil filling pump 13. The expansion tank 12 is installed at the highest position of the system to maintain a high liquid level during normal operation. The oil storage tank 11 is installed at the lowest position of the system to maintain a low liquid level during normal operation.
[0017] The expansion tank 12 is connected to the oil storage tank 11 through an oil filling pipe 14 and an overflow pipe 15. The upper end of the oil filling pipe 14 is connected to the expansion tank 12, one of the branches at the lower end is connected to the external oil filling port through an oil filling pump 13 and an oil filter, and the other branch 16 at the lower end is connected to the oil storage tank 11.
[0018] When filling oil, new oil enters the oil storage tank 11 from the branch 16 through the oil filling pump 13 from the outside, and then is injected into the expansion tank 12 from the pipeline at the bottom of the oil storage tank 11 through the oil filling pump 13 along the oil filling pipe 14. The heat transfer oil in the expansion tank 12 enters the main circulation system using the natural pressure of the high and low position difference.
[0019] If there is heat transfer oil in the oil storage tank 11 originally, the newly added heat transfer oil can also be directly injected into the expansion tank 12 from the outside through the oil injection pump 13 and the oil injection pipe 14 without passing through the oil storage tank 11.
[0020] The oil filling pipe 14 is also connected to an oil drain pipe 17 . When the heat transfer oil in the system needs to be replaced, the heat transfer oil in the system is discharged through the oil filling pump 13 and the oil drain pipe 17 .
[0021] The excess heat transfer oil in the expansion tank 12 can flow into the oil storage tank 11 through the overflow pipe 15, and the gas in the expansion tank 12 and the oil storage tank 11 is discharged through the vent pipe. The bottom of the expansion tank 12 is connected to an expansion pipe 25, and the expansion pipe 25 is connected to the main circulation system through the oil-gas separator 26.
[0022] The main circulation system includes a heating furnace 21, a circulation pump 22 connected to the front end of the inlet of the heating furnace 21, an oil supply pipe 23 connected to the outlet end of the heating furnace 21, and a return oil pipe 24 connected to the inlet end of the main circulation system. The outlets of the return oil pipe 24 and the oil supply pipe 23 are connected to the heat-using equipment. The return oil pipe 24 returns from the heat-using equipment to the oil-gas separator 26. A Y-type oil filter 27 is also connected to the front end entering the circulation pump 22.
[0023] The heat transfer oil enters the main circulation system from the expansion tank 12 along the expansion pipe 25, passes through the oil-gas separator 26 and the Y-type oil filter 27 in sequence, and then enters the circulation pump 22. It is forced to circulate in the heating furnace 21 and heated to a specified high temperature. It is then transported from the oil supply pipe 23 to the heat-using equipment 28. After providing heat energy, the heat transfer oil returns to the main circulation system along the return oil pipe 24 and is reheated to a specified temperature.
[0024] The main circulation system in this embodiment has two sets of heating furnaces, circulation pumps and Y-type oil filters, and a spare circulation pump is also provided.
[0025] The heating furnace 21 is provided with a burner 29 and a waste heat recovery device. After the natural gas is burned by the burner 29, heat exchange is carried out in the furnace body of the heating furnace 21 to heat the heat transfer oil. Nitrogen has a quick fire extinguishing safety device in an emergency. The high-temperature flue gas generated by the burner 29 enters the air preheater 41 of the waste heat recovery device. The blower 42 of the waste heat recovery device can draw cold air into the air preheater 41 to exchange heat with the flue gas. A part of the low-temperature flue gas after heat exchange is discharged from the chimney, and the other part returns to the burner 29 for combustion.
[0026] See Figure 2 As shown, a low-temperature heating system is also connected between the oil supply pipe 23 and the oil return pipe 24. The low-temperature heating system includes a low-temperature oil supply pipe 31 connected to the oil supply pipe 23, a low-temperature oil return pipe 32 connected to the oil return pipe 24, an electric three-way valve 33 and other valves installed on the low-temperature oil supply pipe 31 and the low-temperature oil return pipe 32, and a secondary circulation pump 34 and a temperature sensor 35 installed on the low-temperature oil supply pipe 31. The other ends of the low-temperature oil supply pipe 31 and the low-temperature oil return pipe 32 are connected to a heat-using device 36.
[0027] When the temperature sensor 35 detects that the heating temperature in the low-temperature heating system exceeds or does not reach 120°C, the opening and closing degree of the electric three-way valve 33 and the valve can be adjusted so that the high-temperature oil in the main circulation system and the low-temperature oil in the low-temperature system are mixed to the specified temperature, and then the valve is closed, so that the heat transfer oil temperature of the low-temperature heating system can be maintained.
[0028] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.
Claims
1. A thermal oil heating system, characterized in that: It includes an oil injection and discharge system, a main circulation system and a low-temperature heating system connected by pipelines. The main circulation system and the low-temperature heating system are respectively connected to heat-using equipment requiring different heating temperatures.
2. A thermal oil heating system according to claim 1, characterized in that: The oil filling and draining system comprises a connected oil storage tank, an expansion tank and an oil filling pump, wherein the expansion tank is installed at the highest position of the system and the oil storage tank is installed at the lowest position of the system; The expansion tank is connected to the oil storage tank via an oil filling pipe and an overflow pipe. The upper end of the oil filling pipe is connected to the expansion tank, one of the branches at the lower end is connected to the external oil filling port through an oil filling pump and an oil filter, and the other branch at the lower end is connected to the oil storage tank; the oil filling pipe is also connected to an oil row pipe, and the bottom of the expansion tank is connected to an expansion pipe, and the expansion pipe is connected to the main circulation system via an oil-gas separator.
3. A thermal oil heating system according to claim 2, characterized in that: The main circulation system includes a heating furnace, a circulation pump connected to the front end of the heating furnace inlet, an oil supply pipe connected to the outlet end of the main circulation system, and an oil return pipe connected to the inlet end of the main circulation system. The outlets of the return oil pipe and the oil supply pipe are connected to a heating device, and the other end is connected to an oil-gas separator. A Y-type oil filter is also connected to the front end entering the circulation pump.
4. A thermal oil heating system according to claim 3, characterized in that: The low-temperature heating system includes a low-temperature oil supply pipe connected to the oil supply pipe, a low-temperature oil return pipe connected to the oil return pipe, an electric three-way valve installed on the low-temperature oil supply pipe and the low-temperature oil return pipe, and a secondary circulation pump installed on the low-temperature oil supply pipe. The other ends of the low-temperature oil supply pipe and the low-temperature oil return pipe are connected to a heating device.