Ultrahigh-temperature oil heater with cooling control

Abstract

The application discloses a kind of with cooling control's ultrahigh temperature oil temperature machine, it is related to industrial temperature control equipment technical field, including circulating pumping device, organic heat carrier furnace, client, the output of organic heat carrier furnace is provided with proportional tee valve, two outlets of proportional tee valve are respectively communicated to the input of client by first pipeline, second pipeline;Second pipeline is provided with heat exchanger in series connection, heat exchanger is heat exchange connection with a cooling cycle unit, the output of client is communicated to the input of circulating pumping device by oil return pipe, gas holder is provided with on oil return pipe in series connection;The input of circulating pumping device is also communicated with high expansion tank by oil supplement pipe.The application adopts the above-mentioned one with cooling control's ultrahigh temperature oil temperature machine, heating and cooling function are integrated in the same system, temperature control precision is high, temperature stability is good, system operation is safe and reliable, can satisfy the ultrahigh temperature industrial temperature control demand of wide temperature range.

Description

Technical Field

[0001] This invention relates to the field of industrial temperature control equipment technology, and in particular to an ultra-high temperature oil temperature controller with cooling control. Background Technology

[0002] In modern industrial production, precise temperature control is a core element in ensuring product quality. Oil temperature controllers, which use heat transfer oil as a heat carrier, are widely used in various industrial temperature control scenarios due to their wide temperature control range and good thermal stability.

[0003] Conventional oil temperature controllers in existing technology are limited by system structure and the characteristics of heat transfer oil, with a maximum operating temperature generally only reaching 280℃. This cannot meet the process requirements of industries such as new materials and specialty chemicals, which require ultra-high temperature control above 300℃. Furthermore, most existing oil temperature controllers only have a single heating function, lacking cooling functionality, or they use separate cooling and heating systems, failing to achieve coordinated closed-loop control of heating and cooling within the same circulation loop. This results in low temperature control accuracy, large temperature fluctuations, and an inability to achieve continuous and precise temperature control over a wide temperature range. Summary of the Invention

[0004] The purpose of this invention is to provide an ultra-high temperature oil temperature controller with cooling control, which can meet the ultra-high temperature industrial temperature control requirements over a wide temperature range, and has the advantages of convenient operation and maintenance, long service life, and continuous uninterrupted operation.

[0005] This invention provides an ultra-high temperature oil temperature controller with cooling control, comprising a circulating pumping device, an organic heat carrier furnace, and a client. The output end of the organic heat carrier furnace is equipped with a proportional three-way valve, whose two outlets are connected to the input end of the client via a first pipe and a second pipe, respectively. A heat exchanger is connected in series on the second pipe and is connected to a cooling circulation unit for heat exchange. The output end of the client is connected to the input end of the circulating pumping device via a return oil pipe, and a gas collecting tank is connected in series on the return oil pipe. The input end of the circulating pumping device is also connected to a high-level expansion tank via a replenishment oil pipe. The high-level expansion tank is connected to a low-level oil storage tank via a first oil injection pipe. An oil injection pump is installed on the first oil injection pipe, the output end of which is connected to a main oil discharge pipe, and the input end of the oil injection pump is connected to the main oil injection pipe.

[0006] Preferably, the circulating pumping device includes two sets of circulating pumps connected in parallel. Each set of circulating pumps has a shut-off valve connected in series at both its input and output ends. The two sets of circulating pumps are configured with one in use and one on standby.

[0007] Preferably, a first pressure gauge and a first pressure switch are installed on the connecting pipe between the circulating pumping device and the organic heat carrier furnace; a second pressure switch, a second pressure gauge, and a pressure transmitter are installed on the connecting pipe between the organic heat carrier furnace and the proportional three-way valve.

[0008] Preferably, a first shut-off valve is connected in series on the second pipeline between the proportional three-way valve and the heat exchanger. The ends of the first pipeline and the second pipeline merge to form a main pipeline, which is then connected to the input end of the client. A first temperature sensor and a second shut-off valve are connected in series on the main pipeline. A system bypass pipeline is connected between the main pipeline and the return oil pipeline. A fourth shut-off valve is connected in series on the system bypass pipeline.

[0009] Preferably, the return oil pipe is located between the output end of the client and the gas collection tank, and the top of the gas collection tank is connected to the high-level expansion tank through the first exhaust pipe; the input end of the client is connected to the high-level expansion tank through the second exhaust pipe, and a fourteenth shut-off valve is connected in series on the second exhaust pipe.

[0010] Preferably, the cooling circulation unit includes a cooling water inlet pipe and a cooling water outlet pipe, which are respectively connected to the cooling medium flow channel of the heat exchanger. A fifth shut-off valve is connected in series on the cooling water inlet pipe. The heat exchanger is a spiral plate heat exchanger with an expansion joint in the shell.

[0011] Preferably, the bottom of the gas collecting tank is connected to a sampling cooling device via a pipe.

[0012] Preferably, the high-level expansion tank is equipped with a liquid level sensor and a pressure sensor. The high-level expansion tank is also connected to a nitrogen charging pipe and an exhaust pipe. A first solenoid valve and a check valve are connected in series on the nitrogen charging pipe, and a second solenoid valve is connected in series on the exhaust pipe. The bottom of the high-level expansion tank is connected to the low-level oil storage tank through a drain pipe, and a seventh shut-off valve is connected in series on the drain pipe.

[0013] Preferably, the return oil pipe is located between the gas collecting tank and the circulating pumping device, the second pipe is located between the proportional three-way valve and the heat exchanger, and the bottom of the low-level oil storage tank is connected to the fourth pipe through a pipe; a tenth shut-off valve is connected in series on the main oil discharge pipe, an eleventh shut-off valve is connected in series on the main oil injection pipe, the output end of the oil injection pump is also connected to the low-level oil storage tank through the second oil injection pipe, and a liquid level sensor is installed in the low-level oil storage tank.

[0014] Therefore, the present invention employs an ultra-high temperature oil temperature controller with cooling control, which can meet the ultra-high temperature industrial temperature control requirements over a wide temperature range, and also has the advantages of convenient operation and maintenance, long service life, and continuous uninterrupted operation.

[0015] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0016] picture This is an overall flow chart of an ultra-high temperature oil temperature controller with cooling control according to the present invention.

[0017] Figure Labels Circulating pumping device; Organic heat carrier furnace; , proportional three-way valve; Heat exchangers; Gas collection tank; High-level expansion tank; Low-level oil storage tank; Oil pump; Circulating pump; Carrier shut-off valve; First pressure gauge; First pressure switch; Second pressure switch; Second pressure gauge; Pressure transmitter; First shut-off valve; First temperature sensor; Second shut-off valve; Third shut-off valve; Second temperature sensor; Pressure gauge; Fourth shut-off valve; Fourteenth shut-off valve; The fifteenth shut-off valve; Cooling water inlet pipe; Cooling water outlet pipe; Fifth shut-off valve; Sampling and cooling device; Sixth shut-off valve; Liquid level sensor; Pressure sensor; First solenoid valve; One-way valve; Second solenoid valve; Seventh shut-off valve; Eighth shut-off valve; Ninth shut-off valve; 10th shut-off valve; Eleventh shut-off valve; 12th shut-off valve; Thirteenth shut-off valve; Client. Detailed Implementation

[0018] The technical solution of the present invention will be further described below with reference to the accompanying drawings and embodiments.

[0019] Unless otherwise defined, the technical or scientific terms used in this invention shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention pertains.

[0020] Example 1 like Figure 1 As shown, the present invention provides an ultra-high temperature oil temperature controller with cooling control, comprising a circulating pumping device connected in sequence via pipelines to form a heat transfer oil circulation loop. Organic heat carrier furnace Client Organic heat carrier furnace The organic heat carrier furnace is the core of the system, used to heat and raise the temperature of the circulating heat transfer oil. A proportional three-way valve is installed at the output end. Proportional three-way valve The two outlets are connected to the client via the first and second pipes, respectively. The input end. A heat exchanger is connected in series on the second pipe. heat exchanger It is connected to a cooling circulation unit for heat exchange and is used to cool the heat transfer oil in the second pipe.

[0021] Client For temperature-controlled industrial equipment or process units, the client The output end is connected to the circulating pump device via a return oil pipe. An air collection tank is connected in series on the input end and the return oil pipe. It is used to separate the gas released from the circulating heat transfer oil and prevent the gas from entering the circulating pumping device. This causes cavitation damage.

[0022] Circulating pumping device The input end is also connected to a high-level expansion tank via a replenishment oil pipe. High-level expansion tank This expansion tank is used to accommodate the volume of heat transfer oil as it expands due to heat, while also providing a stable pressure environment for the system. The heat transfer oil inside can be automatically replenished to the circulation loop via a make-up oil pipe to compensate for heat transfer oil losses within the system. A low-level oil storage tank is connected via the first oil injection pipe. An oil injection pump is installed on the first oil injection pipe. Oil pump Used to transfer low-level oil storage tanks The internal heat transfer oil is pumped to the high-level expansion tank. Internally, it enables automatic oil replenishment of the system. Oil pump. The output end is connected to the main oil drain pipe, and the oil injection pump... The input terminal is connected to the main oil injection pipe. These are used for the overall oil draining and initial oil injection operations of the system, respectively.

[0023] Circulating pumping device Includes two sets of circulating pumps connected in parallel. Each group of circulating pumps Both the input and output ends are equipped with carrier shut-off valves connected in series. Two sets of circulating pumps One set of pumps is in operation and one is on standby. During normal system operation, one set of circulating pumps... Open, corresponding front and rear carrier shut-off valves Turn on to power the circulation of the heat transfer oil. Another set of circulation pumps... When in standby mode, the corresponding front and rear carrier shut-off valves Shut down when the circulating pump is working. In case of malfunction, the backup circulating pump can be started immediately. Open the carrier shut-off valves before and after it. Simultaneously close the carrier shut-off valves before and after the faulty pump. This allows for the removal and repair of faulty pumps without stopping the entire system, ensuring the continuity of the production process.

[0024] Circulating pumping device With organic heat carrier furnace A first pressure gauge is installed on the connecting pipe between them. With the first pressure switch Organic heat carrier furnace proportional three-way valve A second pressure switch is installed on the connecting pipe between them. Second pressure gauge and pressure transmitter Second pressure gauge Second pressure switch used for real-time display of system outlet pressure. A preset overpressure protection threshold is set. When the system pressure exceeds the threshold, a shutdown protection mechanism is triggered to prevent the system from operating under overpressure. Pressure transmitter It can collect system outlet pressure data in real time and transmit it to the control system, providing real-time data support for nitrogen pressurization control under ultra-high temperature conditions and realizing closed-loop regulation of system pressure.

[0025] Proportional three-way valve With heat exchanger A first shut-off valve is connected in series on the second pipeline between them. This is used to control the on / off state of the second pipeline. The ends of the first and second pipelines merge to form a main pipeline, which then connects to the client. The input end of the pipeline is connected in series with a first temperature sensor. With the second shut-off valve First temperature sensor probe Used for real-time data collection from the client. The system monitors the temperature of the heat transfer oil and transmits the temperature data to the control system in real time. The control system automatically adjusts the proportional three-way valve based on the difference between the set temperature and the measured temperature. Two-way opening, organic heat carrier furnace The heating power and the start / stop of the cooling circulation unit are controlled to achieve closed-loop temperature control of the system. Second shut-off valve. Used to control the client By controlling the opening and closing of the oil inlet, in conjunction with the valve on the return oil pipe, the client can achieve [the desired outcome]. Complete isolation from the system facilitates client-side operations. Maintenance shutdown.

[0026] A system bypass pipe connects the main pipeline and the return oil pipe, and a fourth shut-off valve is connected in series on the system bypass pipe. When the client When system shutdown for maintenance, or when the system needs no-load commissioning or preheating, the second shut-off valve can be closed. With the client Open the fourth shut-off valve at the outlet. The heat transfer oil flows directly back to the oil pipe through the system bypass pipe, realizing the system's self-circulation and avoiding the heat transfer oil in the organic heat carrier furnace. Excessive dwell time can lead to localized overheating and deterioration, necessitating the protection of the system during debugging and maintenance.

[0027] The return oil pipe is located at the client The output end and the gas collection tank A third shut-off valve is connected in series between them. Second temperature probe With pressure gauge Gas collection tank The top is connected to the high-level expansion tank via the first exhaust pipe. Connected. Client The input end is connected to the high-level expansion tank via the second exhaust pipe. A fourteenth shut-off valve is connected in series on the second exhaust pipe. During the system's heating process, when the first temperature probe... The outlet temperature was detected to have reached At that time, open the fourteenth shut-off valve. The water vapor that has been heated and precipitated in the heat transfer oil is discharged through the second exhaust pipe, completing the dehydration process of the heat transfer oil. When the temperature rises to... At that time, continue to maintain the fourteenth shut-off valve. The system is activated to remove light fractions from the heat transfer oil, thus completing the removal of light fractions and preventing the light components from vaporizing at ultra-high temperatures, which could cause drastic fluctuations in system pressure and ensure system stability under ultra-high temperature conditions.

[0028] The cooling circulation unit includes a cooling water inlet pipe. With cooling water outlet pipe Cooling water inlet pipe With cooling water outlet pipe With heat exchangers respectively The cooling medium flow channel is connected, and the cooling water inlet pipe is connected. A fifth shut-off valve is connected in series at the top. Used to control the flow of cooling water. When the system needs cooling, the fifth shut-off valve is opened. Cooling water enters the heat exchanger through the cooling water inlet pipe. The cooling channel indirectly exchanges heat with the high-temperature heat transfer oil in the second pipe. The cooling water, after being heated by the heat exchange, is discharged through the cooling water outlet pipe, thus achieving precise cooling of the heat transfer oil.

[0029] heat exchanger It is a spiral plate heat exchanger with an expansion joint in the shell. The spiral plate structure can improve the heat exchange efficiency. At the same time, the expansion joint on the shell can effectively absorb the thermal expansion stress generated by the heat exchange of hot and cold media during the cooling process, buffer the severe thermal shock, reduce stress damage to pipes and equipment, and significantly extend the service life of the equipment.

[0030] Gas collection tank The bottom is connected to a sampling cooling device via a pipe. A sixth shut-off valve is connected in series on the pipeline. When it is necessary to perform quality testing on the heat transfer oil in the system to determine whether it has aged, coked, or deteriorated, open the sixth shut-off valve. High-temperature heat transfer oil enters the sampling cooling device. After internal cooling, sampling can be performed without stopping the system. The quality of the heat transfer oil can be monitored in real time, ensuring the safe operation of the system.

[0031] High-level expansion tank A liquid level sensor is installed on top. With pressure sensor Liquid level sensor Real-time monitoring of high-level expansion tank The system automatically starts the oil injection pump when the internal heat transfer oil level falls below the set lower limit. The low-level oil storage tank The internal heat transfer oil is pumped into the high-level expansion tank. The system automatically replenishes oil. When the liquid level reaches the set upper limit, the oil pump... Automatic shutdown to prevent heat transfer oil overflow. High-level expansion tank. It is also connected to a nitrogen filling pipe and an exhaust pipe, with the nitrogen filling pipe connected to an external high-pressure nitrogen source. A first solenoid valve is connected in series on the nitrogen filling pipe. With check valve A second solenoid valve is connected in series on the exhaust pipe. Pressure sensor Real-time monitoring of high-level expansion tank The internal pressure provides data support for nitrogen filling and venting control.

[0032] As the system temperature rises to When the above occurs, the control system automatically starts the nitrogen pressurization program, first simultaneously opening the first solenoid valve. With the second solenoid valve Delay the preset time to empty the high-level expansion tank. The air inside is then released, and the second solenoid valve is closed. High-pressure nitrogen enters the high-level expansion tank through the nitrogen filling pipe. Inside, when the pressure sensor Pressure was detected to have reached the set value (maximum value). When ), close the first solenoid valve. The pressurization process is completed, using high-pressure nitrogen to suppress the vaporization of the heat transfer oil at ultra-high temperatures, ensuring that the heat transfer oil remains in a liquid state. When the system pressure exceeds the set upper limit, the control system automatically opens the second solenoid valve. To release pressure and ensure the system pressure remains within a safe and stable range. (Check valve) Prevents high-level expansion tank The high-pressure nitrogen gas inside is prevented from leaking in the reverse direction, ensuring the safety and reliability of the pressurization system.

[0033] High-level expansion tank The bottom is connected to the low-level oil storage tank via a drain pipe. A seventh shut-off valve is connected in series on the sewage pipe. Open the seventh shut-off valve. The high-level expansion tank can be used Oil and impurities deposited at the bottom are discharged into the low-level oil storage tank. The interior is designed for easy cleaning and maintenance of the system.

[0034] The return oil pipe is located on the gas collection tank With circulating pumping device Between, on the second pipeline, there is a proportional three-way valve With heat exchanger Between, low-level oil storage tank The bottom of the main drain pipe is connected to the fourth drain pipe via a pipeline. A tenth shut-off valve is connected in series on the main drain pipe. An eleventh shut-off valve is connected in series on the main oil injection pipe. Oil pump The output end is also connected to the low-level oil reservoir via a second oil injection pipe. Connect the thirteenth shut-off valve in series on the second oil injection pipe. Then connect to the low-level oil storage tank Low-level oil storage tank It is equipped with a liquid level sensor for real-time monitoring of the low-level oil storage tank. The amount of heat transfer oil stored inside.

[0035] Therefore, the present invention adopts the above-mentioned ultra-high temperature oil temperature controller with cooling control, which integrates heating and cooling functions in the same system. It has high temperature control accuracy, good temperature stability, and safe and reliable system operation. It can meet the ultra-high temperature industrial temperature control requirements over a wide temperature range. At the same time, it has the advantages of convenient operation and maintenance, long service life, and continuous uninterrupted operation, effectively solving many defects in the prior art.

[0036] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the technical solutions of the present invention, and these modifications or equivalent substitutions cannot cause the modified technical solutions to deviate from the spirit and scope of the technical solutions of the present invention.

Claims

1. A high-temperature oil temperature controller with cooling control, characterized in that, The system includes a circulating pumping device, an organic heat carrier furnace, and a client. The output end of the organic heat carrier furnace is equipped with a proportional three-way valve. The two outlets of the proportional three-way valve are connected to the input end of the client through a first pipe and a second pipe, respectively. A heat exchanger is connected in series on the second pipe and is connected to the cooling circulation unit for heat exchange. The output end of the client is connected to the input end of the circulating pumping device through a return oil pipe. A gas collecting tank is connected in series on the return oil pipe. The input end of the circulating pumping device is also connected to a high-level expansion tank through a makeup oil pipe. The high-level expansion tank is connected to a low-level oil storage tank through a first oil injection pipe. An oil injection pump is installed on the first oil injection pipe. The output end of the oil injection pump is connected to a main oil discharge pipe, and the input end of the oil injection pump is connected to a main oil injection pipe.

2. A high-temperature oil temperature controller with cooling control according to claim 1, characterized in that, The circulating pumping device includes two sets of circulating pumps connected in parallel. Each set of circulating pumps has a shut-off valve connected in series at both the input and output ends. The two sets of circulating pumps are configured with one in use and one on standby.

3. A high-temperature oil temperature controller with cooling control according to claim 1, characterized in that, A first pressure gauge and a first pressure switch are installed on the connecting pipe between the circulating pumping device and the organic heat carrier furnace; a second pressure switch, a second pressure gauge, and a pressure transmitter are installed on the connecting pipe between the organic heat carrier furnace and the proportional three-way valve.

4. A high-temperature oil temperature controller with cooling control according to claim 1, characterized in that, A first shut-off valve is connected in series on the second pipeline between the proportional three-way valve and the heat exchanger. The ends of the first pipeline and the second pipeline merge to form a main pipeline, which is then connected to the input end of the client. A first temperature sensor and a second shut-off valve are connected in series on the main pipeline. A system bypass pipeline is connected between the main pipeline and the return oil pipeline. A fourth shut-off valve is connected in series on the system bypass pipeline.

5. A high-temperature oil temperature controller with cooling control according to claim 1, characterized in that, The return oil pipe is located between the output end of the client and the gas collection tank. The top of the gas collection tank is connected to the high-level expansion tank through the first exhaust pipe. The input end of the client is connected to the high-level expansion tank through the second exhaust pipe. A fourteenth shut-off valve is connected in series on the second exhaust pipe.

6. A high-temperature oil temperature controller with cooling control according to claim 1, characterized in that, The cooling circulation unit includes a cooling water inlet pipe and a cooling water outlet pipe, which are respectively connected to the cooling medium flow channel of the heat exchanger. A fifth shut-off valve is connected in series on the cooling water inlet pipe. The heat exchanger is a spiral plate heat exchanger with an expansion joint in the shell.

7. A high-temperature oil temperature controller with cooling control according to claim 1, characterized in that, The bottom of the gas collection tank is connected to a sampling and cooling device via a pipe.

8. A high-temperature oil temperature controller with cooling control according to claim 1, characterized in that, The high-level expansion tank is equipped with a liquid level sensor and a pressure sensor. The high-level expansion tank is also connected to a nitrogen filling pipe and an exhaust pipe. A first solenoid valve and a check valve are connected in series on the nitrogen filling pipe, and a second solenoid valve is connected in series on the exhaust pipe. The bottom of the high-level expansion tank is connected to the low-level oil storage tank through a drain pipe, and a seventh shut-off valve is connected in series on the drain pipe.

9. A high-temperature oil temperature controller with cooling control according to claim 1, characterized in that, The return oil pipe is located between the gas collecting tank and the circulating pumping device; the second pipe is located between the proportional three-way valve and the heat exchanger; the bottom of the low-level oil storage tank is connected to the fourth pipe through a pipe; a tenth shut-off valve is connected in series on the main oil discharge pipe; an eleventh shut-off valve is connected in series on the main oil injection pipe; the output end of the oil injection pump is also connected to the low-level oil storage tank through the second oil injection pipe; and a liquid level sensor is installed in the low-level oil storage tank.

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