Automatic temperature control system

Abstract

The utility model relates to an automatic temperature control system which is applied to the field of chemical plant temperature control. The device comprises a storage tank, a liquid inlet pipe and a liquid outlet pipe, a circulating pipe is arranged between the liquid inlet pipe and the liquid outlet pipe, and the circulating pipe is communicated with the liquid inlet pipe and the liquid outlet pipe; the storage tank comprises an inner-layer shell and an outer-layer shell, the outer-layer shell sleeves the inner-layer shell, a jacket is formed between the inner-layer shell and the outer-layer shell, and the liquid inlet pipe and the liquid outlet pipe are respectively communicated with the jacket; an adjusting assembly is arranged between the jacket and the liquid inlet pipe, a first one-way valve is arranged on the circulating pipe, and liquid in the circulating pipe flows to the storage tank through the first one-way valve; the adjusting assembly comprises a first valve group, a second valve group and a detection part, and the first valve group and the second valve group are arranged on the liquid inlet pipe to control on-off of the liquid inlet pipe. The system has the advantages that the structure is simplified, the occupied area can be reduced, and meanwhile, due to the fact that an independent heat preservation system is not needed, more energy is saved during use.

Description

Technical Field

[0001] The present application relates to the field of temperature control in chemical plants, and in particular to an automatic temperature control system. Background Art

[0002] With the development of chemical industries such as polyester resins and electronic chemicals, chemical plants will build public engineering systems in the early stages of construction, such as hot water, heat transfer oil, steam, chilled water, etc., for heating and cooling of plant equipment. However, the operating temperatures of these public engineering systems are fixed parameters. If some devices encounter some special situations during actual production, and the temperature of the heat transfer oil required is much lower than the temperature of the heat transfer oil provided by the public engineering system, the heat transfer oil used for the device cannot directly use the public engineering system of the plant, and it is necessary to build another set of heat transfer oil facilities dedicated to the device, which will increase the equipment footprint, increase construction costs, and increase energy consumption. Utility Model Content

[0003] In order to improve the problem of large equipment footprint and high energy consumption, the present application provides an automatic temperature control system.

[0004] The present application provides an automatic temperature control system, which adopts the following technical solution:

[0005] A temperature automatic control system comprises a storage tank, a liquid inlet pipe and a liquid outlet pipe, wherein a circulation pipe is arranged between the liquid inlet pipe and the liquid outlet pipe, and the circulation pipe is connected with the liquid inlet pipe and the liquid outlet pipe;

[0006] The storage tank comprises an inner shell and an outer shell, the outer shell is sleeved on the inner shell and a jacket is formed between the inner shell and the outer shell, and the liquid inlet pipe and the liquid outlet pipe are respectively connected to the jacket;

[0007] A regulating assembly is arranged between the jacket and the liquid inlet pipe, a first one-way valve is arranged on the circulation pipe, and the liquid in the circulation pipe flows to the storage tank through the first one-way valve;

[0008] The regulating component includes a first valve group, a second valve group and a detection unit. The first valve group and the second valve group are respectively arranged on the liquid inlet pipe to control the on and off of the liquid inlet pipe. The first valve group is arranged at an end of the liquid inlet pipe away from the storage tank, the second valve group is arranged at an end of the liquid inlet pipe close to the storage tank, and the circulation pipe is arranged between the first valve group and the second valve group.

[0009] By adopting the above technical solution, the detection unit is set to form a control loop with the first valve group and the second valve group to automatically adjust the temperature, making full use of the existing public engineering heating system in the factory area, and no independent heating device is needed. This reduces the size of the entire equipment, reduces energy consumption, and thus reduces land occupation.

[0010] Optionally, the detection unit includes a temperature detector, a probe of the temperature detector is inserted into the jacket to test the temperature of the liquid in the jacket, and the temperature detector respectively connects the first valve group and the second valve group to control the opening and closing of the first valve group and the second valve group.

[0011] By adopting the above technical solution, the temperature in the tank is detected by the temperature detector. When the temperature is lower than the required temperature, the first valve group and the second valve group can be controlled to open in time, so that the high-temperature liquid in the liquid inlet pipe enters the jacket. In this way, the temperature of the liquid in the jacket can be adjusted, and the existing public engineering heating system in the factory area can be fully utilized without the need to set up an independent heating device. This reduces the size of the entire equipment, reduces energy consumption, and thus reduces the footprint.

[0012] Optionally, the first valve group includes a regulating valve and a bypass valve, a bypass pipe is provided on the liquid inlet pipe, the bypass valve is arranged on the bypass pipe to control the on-off of the bypass pipe, the regulating valve is arranged on the liquid inlet pipe to control the on-off of the liquid inlet pipe, and the regulating valve and the bypass valve are respectively connected to the temperature detector by signals.

[0013] By adopting the above technical solution, the regulating valve is actually composed of multiple groups of ball valves to achieve flow control in the liquid inlet pipe to improve the regulation accuracy.

[0014] Optionally, the second valve group includes a shut-off valve, which is arranged on the liquid inlet pipe to control the on-off of the liquid inlet pipe, and the shut-off valve signal is connected to the temperature detector.

[0015] By adopting the above technical solution, the shut-off valve and the regulating valve are controlled by the temperature detector. When the regulating valve and the shut-off valve are opened, the heat transfer oil can be added to increase the temperature. When the regulating valve and the shut-off valve are closed, the heat transfer oil can maintain the jacket circulation all the time and will not flow back to the liquid inlet pipe or the liquid outlet pipe, thereby maintaining the temperature of the tank jacket.

[0016] Optionally, a circulating pump is further provided on the liquid inlet pipe to pump liquid into the jacket through the liquid inlet pipe, and a second one-way valve is provided at the liquid outlet of the circulating pump, and the liquid pumped by the circulating pump flows into the jacket via the second one-way valve.

[0017] By adopting the above technical scheme, the circulating pump and the valves returning to the liquid inlet pipe or the liquid outlet pipe are always kept open, so that the heat transfer oil can be kept circulating at all times; when the regulating valve and the shut-off valve are opened, the heat transfer oil can be supplemented to increase the temperature. Due to the first check valve and the second check valve, the supplemented heat transfer oil will not directly return to the liquid inlet pipe or the liquid outlet pipe, but will be fully supplemented to the tank jacket to increase the temperature, and the excess heat transfer oil will automatically overflow back to the liquid inlet pipe or the liquid outlet pipe; when the regulating valve and the shut-off valve are closed, the circulating pump is turned on, and the heat transfer oil can maintain the jacket circulation all the time, and will not flow back to the liquid inlet pipe or the liquid outlet pipe, so as to maintain the jacket temperature.

[0018] Optionally, a Y-shaped filter is provided at the liquid inlet of the circulation pump, the liquid inlet of the Y-shaped filter is connected to the liquid inlet pipe, the liquid outlet of the Y-shaped filter is connected to the liquid inlet of the pump, and the liquid in the liquid inlet pipe flows into the circulation pump after being filtered by the Y-shaped filter.

[0019] By adopting the above technical solution, the circulation pump is always kept open, and the heat transfer oil can always be circulated. The heat transfer oil will be filtered by a Y-shaped filter before entering the circulation pump to keep the oil pure and reduce the probability of clogging of the circulation pump.

[0020] Optionally, a pressure gauge is provided at the liquid outlet of the circulation pump, and a probe of the pressure gauge extends into the liquid outlet of the circulation pump to detect the liquid pressure at the liquid outlet.

[0021] By adopting the above technical solution, a pressure gauge is used to detect the pressure of the liquid inlet pipe, so that the pressure can be monitored in real time and the impact of excessive pressure can be reduced.

[0022] Optionally, a thermometer is provided at one end of the liquid inlet pipe close to the storage tank, and a probe of the thermometer is inserted into the liquid inlet pipe to test the temperature of the liquid in the liquid inlet pipe.

[0023] By adopting the above technical solution, a thermometer is added to the liquid inlet pipe so that the temperature entering the jacket is more accurate, reducing the impact of the transportation process on the liquid temperature.

[0024] In summary, the present application includes at least one of the following beneficial effects:

[0025] 1. The circulation pump is always kept open to keep the heat transfer oil circulating. When the regulating valve and the shut-off valve are opened, the heat transfer oil can be added to increase the temperature. Due to the check valve, the added heat transfer oil will not directly return to the inlet or outlet pipe, but will be added to the tank jacket to increase the temperature. The excess heat transfer oil will automatically overflow back to the inlet or outlet pipe. When the regulating valve and the shut-off valve are closed, the circulation pump is turned on, and the heat transfer oil can keep the jacket circulating and will not flow back to the inlet or outlet pipe to maintain the temperature of the tank jacket.

[0026] 2. Check valves are installed on the liquid inlet pipe and the liquid outlet pipe to control the liquid flow direction and ensure that the supplementary heat transfer oil always flows to the tank jacket. When the cut-off valve is closed, the liquid medium always keeps circulating in the jacket under the action of the circulating pump and will not flow back to the liquid inlet pipe or the liquid outlet pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a schematic diagram of the structure of the automatic temperature control system in the embodiment of the present application;

[0028] In the figure: 1. Storage tank; 2. Liquid inlet pipe; 21. Temperature detector; 22. Regulating valve; 23. Bypass pipe; 24. Bypass valve; 25. Shut-off valve; 3. Liquid outlet pipe; 4. Circulating pipe; 41. First one-way valve; 42. Second one-way valve; 5. Circulating pump; 6. Y-shaped filter; 7. Pressure gauge; 8. Thermometer. DETAILED DESCRIPTION

[0029] The following is combined with Figure 1 This application is described in further detail.

[0030] The present application embodiment discloses a temperature automatic control system, which is applied in a chemical plant, and uses the heat source medium in the chemical plant as the main medium. Figure 1 The system includes a storage tank 1, a storage tank 1, and a storage tank 1 including an outer shell and an inner shell. The inner shell is fitted inside the outer shell and a jacket for containing a medium is formed between the inner shell and the outer shell. The material to be insulated is placed in the inner shell. An inlet pipe 2 and an outlet pipe 3 are fixed on the outer shell. The inlet pipe 2 and the outlet pipe 3 are connected to the jacket respectively. The inlet pipe 2 transports the medium into the jacket and the medium circulates in the jacket. A circulation pipe 4 is installed between the inlet pipe 2 and the outlet pipe 3, so that the medium circulates in sequence between the inlet pipe 2, the jacket, and the outlet pipe 3 due to the connection effect of the circulation pipe 4.

[0031] When the required temperature of the material stored in the inner shell is lower than the medium temperature, temperature regulation is required. Specifically, an adjustment component is arranged between the jacket and the liquid inlet pipe 2, and a first one-way valve 41 is arranged on the circulation pipe 4. The liquid flow in the circulation pipe 4 flows to the storage tank 1 through the first one-way valve 41. The adjustment component includes a first valve group, a second valve group and a detection unit. The first valve group and the second valve group are respectively arranged on the liquid inlet pipe 2 to control the opening and closing of the liquid inlet pipe 2. The first valve group is arranged at one end of the liquid inlet pipe 2 away from the storage tank 1, and the second valve group is arranged at one end of the liquid inlet pipe 2 close to the storage tank 1, and the circulation pipe 4 is arranged between the first valve group and the second valve group. The detection unit includes a temperature detector 21. The probe of the temperature detector 21 is inserted into the jacket to test the temperature of the liquid in the jacket. The temperature detector 21 respectively connects the first valve group and the second valve group with signals to control the opening and closing of the first valve group and the second valve group. A circulating pump 5 is also provided on the liquid inlet pipe 2 to pump liquid into the jacket through the liquid inlet pipe 2 . A second one-way valve 42 is provided at the liquid outlet of the circulating pump 5 . The liquid pumped by the circulating pump 5 flows into the jacket via the second one-way valve 42 .

[0032] The detection unit includes a temperature detector 21. The probe of the temperature detector 21 is inserted into the jacket to test the temperature of the liquid in the jacket. The temperature detector 21 is connected to the first valve group and the second valve group by signal to control the opening and closing of the first valve group and the second valve group. The first valve group includes a regulating valve 22 and a bypass valve 24. A bypass pipe 23 is provided on the liquid inlet pipe 2. The bypass valve 24 is arranged on the bypass pipe 23 to control the on and off of the bypass pipe 23. The regulating valve 22 is arranged on the liquid inlet pipe 2 to control the on and off of the liquid inlet pipe 2. The regulating valve 22 and the bypass valve 24 are connected to the temperature detector 21 by signal. The second valve group includes a shut-off valve 25. The shut-off valve 25 is arranged on the liquid inlet pipe 2 to control the on and off of the liquid inlet pipe 2. The shut-off valve 25 is connected to the temperature detector 21 by signal. Take the example that the medium is the heat transfer oil of the chemical plant, the temperature of the heat transfer oil is 280°C, and the jacket needs to use the heat transfer oil temperature of 150°C. When the storage tank 1 is used for the first time and is initially operated, the regulating valve 22 and the shut-off valve are opened so that the jacket is filled with heat transfer oil. When the natural cooling temperature drops below 150°C, the detection unit detects that the temperature of the heat transfer oil in the jacket is lower than 150°C, and controls the opening of the regulating valve 22 and the shut-off valve to replenish the heat transfer oil until the temperature of the heat transfer oil in the jacket slowly increases to 150°C, and then closes the regulating valve 22 and the shut-off valve. At this time, due to the action of the first one-way valve 41 and the second one-way valve 42 and in conjunction with the circulating pump 5, the heat transfer oil that has reached the predetermined temperature of 150°C can only circulate in the jacket until the heat transfer oil in the jacket is lower than the preset temperature, and then the aforementioned steps are executed again to keep the temperature in the storage tank 1 constant.

[0033] Of course, the liquid inlet of the circulation pump 5 is provided with a Y-shaped filter 6, the liquid inlet of the Y-shaped filter 6 is connected to the liquid inlet pipe 2, and the liquid outlet of the Y-shaped filter 6 is connected to the liquid inlet of the pump. The liquid in the liquid inlet pipe 2 is filtered by the Y-shaped filter 6 and flows into the circulation pump 5. The circulation pump 5 is always kept open, and the heat transfer oil can always be kept circulating. The heat transfer oil will be filtered by the Y-shaped filter 6 before entering the circulation pump 5, so as to keep the oil pure and reduce the probability of blockage of the circulation pump 5. The liquid outlet of the circulation pump 5 is provided with a pressure gauge 7, and the probe of the pressure gauge 7 is extended into the liquid outlet of the circulation pump 5 to detect the liquid pressure at the liquid outlet, and a thermometer 8 can be added to the liquid inlet pipe 2 so that the temperature entering the jacket is more accurate, reducing the influence of the transportation process on the liquid temperature. An independent thermometer 8 is added to the end of the liquid inlet pipe 2 close to the storage tank 1, and the probe of the thermometer 8 is inserted into the liquid inlet pipe 2 to test the liquid temperature in the liquid inlet pipe 2.

[0034] The circulating pump 5 of the present application is always kept open, and the heat transfer oil can be kept circulating all the time. When the regulating valve 22 and the shut-off valve are opened, the heat transfer oil can be supplemented to increase the temperature. Due to the first check valve and the second check valve, the supplemented heat transfer oil will not flow back along the liquid inlet pipe 2 or the liquid outlet pipe 3, but will be fully supplemented to the jacket of the storage tank 1 to increase the temperature, and the excess heat transfer oil will automatically overflow back into the liquid inlet pipe 2 or the liquid outlet pipe 3. When the regulating valve 22 and the shut-off valve are closed, the circulating pump 5 is turned on, and the heat transfer oil can keep the jacket circulating all the time, and will not flow back into the liquid inlet pipe 2 or the liquid outlet pipe 3, so as to keep the jacket temperature of the storage tank 1 in a relatively constant state. The whole system only uses the loop change of the pipeline to achieve the constant temperature of the jacket, and there is no need to set up a separate set of independent insulation system for this purpose. Therefore, in addition to simplifying the structure, it can also reduce the floor space. At the same time, because there is no need for an independent set of insulation system, it is more energy-saving when used.

[0035] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A temperature automatic control system, comprising a storage tank (1), a liquid inlet pipe (2) and a liquid outlet pipe (3), characterized in that: A circulation pipe (4) is provided between the liquid inlet pipe (2) and the liquid outlet pipe (3), and the circulation pipe (4) is connected with the liquid inlet pipe (2) and the liquid outlet pipe (3); The storage tank (1) comprises an inner shell and an outer shell, the outer shell is sleeved on the inner shell and a jacket is formed between the inner shell and the outer shell, and the liquid inlet pipe (2) and the liquid outlet pipe (3) are respectively connected to the jacket; An adjusting assembly is arranged between the jacket and the liquid inlet pipe (2), a first one-way valve (41) is arranged on the circulation pipe (4), and the liquid in the circulation pipe (4) flows to the storage tank (1) through the first one-way valve (41); The regulating assembly comprises a first valve group, a second valve group and a detection unit, wherein the first valve group and the second valve group are respectively arranged on the liquid inlet pipe (2) to control the opening and closing of the liquid inlet pipe (2), the first valve group is arranged at an end of the liquid inlet pipe (2) away from the storage tank (1), the second valve group is arranged at an end of the liquid inlet pipe (2) close to the storage tank (1), and the circulation pipe (4) is arranged between the first valve group and the second valve group.

2. The automatic temperature control system according to claim 1, characterized in that: The detection unit comprises a temperature detector (21), a probe of the temperature detector (21) is inserted into the jacket to test the temperature of the liquid in the jacket, and the temperature detector (21) is connected to the first valve group and the second valve group through signals to control the opening and closing of the first valve group and the second valve group.

3. A temperature automatic control system according to claim 2, characterized in that: The first valve group comprises a regulating valve (22) and a bypass valve (24); a bypass pipe (23) is provided on the liquid inlet pipe (2); the bypass valve (24) is arranged on the bypass pipe (23) to control the on-off of the bypass pipe (23); the regulating valve (22) is arranged on the liquid inlet pipe (2) to control the on-off of the liquid inlet pipe (2); the regulating valve (22) and the bypass valve (24) are respectively connected to the temperature detector (21) by signals.

4. A temperature automatic control system according to claim 3, characterized in that: The second valve group comprises a cut-off valve (25), which is arranged on the liquid inlet pipe (2) to control the on-off of the liquid inlet pipe (2), and the signal of the cut-off valve (25) is connected to the temperature detector (21).

5. The automatic temperature control system according to claim 1, characterized in that: The liquid inlet pipe (2) is also provided with a circulation pump (5) for pumping liquid into the jacket through the liquid inlet pipe (2); a second one-way valve (42) is provided at the liquid outlet of the circulation pump (5); the liquid pumped by the circulation pump (5) flows into the jacket through the second one-way valve (42).

6. The automatic temperature control system according to claim 5, characterized in that: The liquid inlet of the circulation pump (5) is provided with a Y-shaped filter (6), the liquid inlet of the Y-shaped filter (6) is connected to the liquid inlet pipe (2), the liquid outlet of the Y-shaped filter (6) is connected to the liquid inlet of the pump, and the liquid in the liquid inlet pipe (2) is filtered by the Y-shaped filter (6) and then flows into the circulation pump (5).

7. The automatic temperature control system according to claim 5, characterized in that: A pressure gauge (7) is provided at the liquid outlet of the circulation pump (5), and a probe of the pressure gauge (7) extends into the liquid outlet of the circulation pump (5) to detect the liquid pressure at the liquid outlet.

8. The automatic temperature control system according to claim 1, characterized in that: A thermometer (8) is provided at one end of the liquid inlet pipe (2) close to the storage tank (1), and a probe of the thermometer (8) is inserted into the liquid inlet pipe (2) to test the temperature of the liquid in the liquid inlet pipe (2).

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