Accurate temperature control system for jacket of liquid preparation tank

Abstract

The utility model discloses an accurate temperature control system for a jacket of a liquid preparation tank, and belongs to the related technical field of temperature control systems. Comprising a liquid preparation tank, a chilled water return interface, a chilled water inlet interface, a steam inlet, a compressed air inlet, a pure water inlet, a heat exchanger, a circulating pump, a drain valve group, a safety valve, a pressure gauge, a temperature sensor, a liquid level sensor, a pipeline sight glass, a check valve and a pneumatic valve, the liquid preparation tank is provided with an open containing cavity, liquid is contained in the containing cavity, a jacket is arranged on the outer side of the liquid preparation tank, and a medium flows in the jacket; the chilled water return connector and the chilled water inlet connector are connected to the two ends of the jacket respectively. The compressed air inlet is connected to the other end of the jacket; the pure water inlet is connected to the other end of the jacket; the heat exchanger comprises a first heat exchanger and a second heat exchanger; one end of the circulating pump is connected to the first heat exchanger, and the other end is connected to the second heat exchanger. The utility model is used for solving the technical problem of large temperature deviation in the prior art.

Description

Technical Field

[0001] The utility model belongs to the technical field related to temperature control systems, in particular to a precise temperature control system for a liquid dispensing tank jacket. Background Art

[0002] The liquid preparation tank is a commonly used equipment in the pharmaceutical industry, which is used to prepare solutions of different concentrations and components, such as solvents, buffers, culture media, etc. The temperature control of the liquid preparation tank is an important part of the pharmaceutical process. Different solutions need to be prepared, stored or reacted at different temperatures to ensure the quality and stability of the solution.

[0003] With the development of the industry, the temperature requirements of the liquid mixing tank are getting higher and higher. The conventional temperature control method is to heat up the jacket steam, cool down the cooling water, and supply constant temperature hot water by the hot water system. This method has a large temperature deviation and cannot meet the needs of production. Therefore, it is necessary to develop a precise temperature control system for the jacket of the liquid mixing tank to solve the above technical problems. Utility Model Content

[0004] In view of the above problems, the utility model provides a precise temperature control system for a liquid preparation tank jacket, which is used to solve the technical problem of large temperature deviation in the prior art.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0006] The liquid dispensing tank jacket precise temperature control system comprises a liquid dispensing tank, wherein the liquid dispensing tank has an open receiving chamber, in which liquid is contained, a jacket is arranged on the outside of the liquid dispensing tank, and medium flows in the jacket; one end of the jacket is respectively connected with a chilled water return interface and a chilled water inlet interface; one end of the jacket and one end of the heat exchanger are both provided with a steam inlet; the other end of the jacket is provided with a compressed air inlet, a pure water inlet, a liquid level sensor, a safety valve and a pressure gauge;

[0007] A heat exchanger is provided at one end of the steam inlet, and the heat exchanger is divided into a first heat exchanger and a second heat exchanger. One end of the first heat exchanger is connected to the steam inlet, and the other end of the first heat exchanger is connected to one end of the circulation pump. One end of the second heat exchanger is connected to the chilled water inlet interface, and the other end of the second heat exchanger is connected to the other end of the circulation pump. A check valve is provided at the outlet of the circulation pump.

[0008] A steam trap group is provided at one end of the jacket, the steam trap group includes a first steam trap and a second steam trap, the first steam trap is connected to one end of the jacket, and the second steam trap is connected to one end of the heat exchanger;

[0009] Temperature sensors are provided at one end of the liquid distribution tank and one end of the circulation pump.

[0010] Compared with the prior art, the beneficial effects of the utility model are as follows: the utility model can realize accurate temperature control of the jacket of the liquid preparation tank, improve the quality and efficiency of liquid preparation, reduce energy consumption and cost, and has good practicality and economy.

[0011] As a further improvement of the above scheme, the check valve is divided into a first check valve and a second check valve. The first check valve is connected to the chilled water inlet interface and the heat exchanger to control the inflow direction of the chilled water; the second check valve is connected to the first steam inlet and the heat exchanger to control the inflow direction of the steam.

[0012] The technical effect of the above improvements is that they prevent the backflow of chilled water and steam in the pipeline and ensure the normal operation of the system.

[0013] As a further improvement of the above solution, a pipeline sight glass is provided between the first heat exchanger and the second heat exchanger, and a pipeline sight glass is provided between the liquid level sensor and the eighth pneumatic valve.

[0014] The technical effect of the above improvement is: it is used to observe the flow of the medium.

[0015] As a further improvement of the above solution, the steam inlet is divided into a first steam inlet and a second steam inlet, the first steam inlet is connected to one end of the jacket, and the second steam inlet is connected to one end of the heat exchanger.

[0016] The technical effect of the above improvement is: it is used to access industrial steam.

[0017] As a further improvement of the above scheme, the pneumatic valve includes a first pneumatic valve to an eleventh pneumatic valve, the first pneumatic valve, the second pneumatic valve and the third pneumatic valve are respectively connected to the first heat exchanger, the second heat exchanger and the chilled water return interface, for controlling the flow rate of the refrigerant, the fourth pneumatic valve, the fifth pneumatic valve and the sixth pneumatic valve are respectively connected to the compressed air inlet, the pure water inlet and one end of the circulating pump, for controlling the inflow of compressed air and pure water, the seventh pneumatic valve, the eighth pneumatic valve and the ninth pneumatic valve are respectively connected to the first steam inlet, the second steam inlet and the first steam trap, for controlling the inflow of steam and the discharge of condensate, the tenth pneumatic valve and the eleventh pneumatic valve are respectively connected to the safety valve and the second steam trap, for controlling the switching of the safety valve and the steam trap.

[0018] As a further improvement of the above solution, the temperature sensor includes a first temperature sensor and a second temperature sensor, the first temperature sensor is connected to one end of the liquid mixing tank, and the second temperature sensor is connected to one end of the circulation pump.

[0019] The technical effects of the above improvement are: it is used to detect the temperature inside the liquid distribution tank and to detect the medium temperature at the outlet of the circulation pump.

[0020] As a further improvement of the above scheme, the switching states of the first pneumatic valve, the second pneumatic valve, the third pneumatic valve, the fourth pneumatic valve, the fifth pneumatic valve, the sixth pneumatic valve, the seventh pneumatic valve, the eighth pneumatic valve, the ninth pneumatic valve, the tenth pneumatic valve and the eleventh pneumatic valve are jointly controlled by the first temperature sensor and the second temperature sensor.

[0021] The technical effects of the above improvements are: it can further improve the accuracy and sensitivity of the temperature control of the liquid preparation tank jacket, enhance the intelligence and automation of the system, reduce manual intervention and errors, and improve the reliability and safety of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the utility model.

[0023] In the figure: 1. Liquid distribution tank; 2. Chilled water return interface; 3. Chilled water inlet interface; 4. Steam inlet; 4-1. First steam inlet; 4-2. Second steam inlet; 5. Compressed air inlet; 6. Pure water inlet; 7. Heat exchanger; 7-1. First heat exchanger; 7-2. Second heat exchanger; 8. Circulating pump; 9. Steam trap group; 9-1. First steam trap; 9-2. Second steam trap; 10. Safety valve; 11. Pressure gauge; 12. Temperature sensor; 12-1. First temperature sensor; 12-2, second temperature sensor; 13, liquid level sensor; 14, pipeline sight glass; 15, check valve; 15-1, first check valve; 15-2, second check valve; V1, first pneumatic valve; V2, second pneumatic valve; V3, third pneumatic valve; V4, fourth pneumatic valve; V5, fifth pneumatic valve; V6, sixth pneumatic valve; V7, seventh pneumatic valve; V8, eighth pneumatic valve; V9, ninth pneumatic valve; V10, tenth pneumatic valve; V11, eleventh pneumatic valve. DETAILED DESCRIPTION

[0024] In order to enable those skilled in the art to better understand the technical solution, the technical solution is described in detail below in conjunction with the embodiments. The description in this section is only exemplary and explanatory and should not have any limiting effect on the protection scope of the present utility model.

[0025] Embodiment 1:

[0026] like Figure 1 As shown, the specific structure of this embodiment is: a precise temperature control system for a liquid dispensing tank jacket, including a liquid dispensing tank 1, a chilled water return interface 2, a chilled water inlet interface 3, a steam inlet 4, a compressed air inlet 5, a pure water inlet 6, a heat exchanger 7, a circulating pump 8, a steam trap group 9, a safety valve 10, a pressure gauge 11, a temperature sensor 12, a liquid level sensor 13, a pipeline sight glass 14, a check valve 15 and a pneumatic valve;

[0027] The liquid preparation tank 1 has an open receiving chamber, in which liquid is contained, and a jacket is provided on the outer side of the liquid preparation tank, in which a medium flows;

[0028] The chilled water return interface 2 and the chilled water inlet interface 3 are respectively connected to the two ends of the jacket for connecting to the external refrigerant;

[0029] The steam inlet 4 is divided into a first steam inlet 4-1 and a second steam inlet 4-2. The first steam inlet 4-1 is connected to one end of the jacket, and the second steam inlet 4-2 is connected to one end of the heat exchanger 7 for receiving industrial steam.

[0030] The compressed air inlet 5 is connected to the other end of the jacket for receiving compressed air;

[0031] A pure water inlet 6 is connected to the other end of the jacket for receiving pure water;

[0032] The heat exchanger 7 is divided into a first heat exchanger 7-1 and a second heat exchanger 7-2. One end of the first heat exchanger 7-1 is connected to the steam inlet 4-2, and the other end of the first heat exchanger 7-1 is connected to one end of the circulation pump 8. One end of the second heat exchanger 7-2 is connected to the chilled water inlet interface 3, and the other end of the second heat exchanger 7-2 is connected to the other end of the circulation pump 8.

[0033] One end of the circulation pump 8 is connected to the first heat exchanger 7-1, and the other end of the circulation pump 8 is connected to the second heat exchanger 7-2. A check valve 15 is provided at the outlet of the circulation pump to prevent the medium from flowing back.

[0034] The steam trap group 9 includes a first steam trap 9-1 and a second steam trap 9-2. The first steam trap 9-1 is connected to one end of the jacket, and the second steam trap 9-2 is connected to one end of the heat exchanger 7, for discharging condensed water in the jacket and the heat exchanger 7.

[0035] A safety valve 10 is connected to one end of the jacket to prevent excessive pressure in the jacket;

[0036] A pressure gauge 11 is connected to one end of the jacket and is used to display the pressure inside the jacket;

[0037] The temperature sensor 12 includes a first temperature sensor 12-1 and a second temperature sensor 12-2. The first temperature sensor 12-1 is connected to one end of the liquid dispensing tank 1 to detect the temperature inside the liquid dispensing tank. The second temperature sensor 12-2 is connected to one end of the circulation pump 8 to detect the medium temperature at the outlet of the circulation pump 8.

[0038] The liquid level sensor 13 is connected to one end of the jacket and is used to detect the liquid level in the jacket;

[0039] The pneumatic valves include the first pneumatic valve V1 to the eleventh pneumatic valve V11. The first pneumatic valve V1, the second pneumatic valve V2 and the third pneumatic valve V3 are respectively connected to the first heat exchanger 7-1, the second heat exchanger 7-2 and the chilled water return interface 2 for controlling the flow of the refrigerant. The fourth pneumatic valve V4, the fifth pneumatic valve V5 and the sixth pneumatic valve V6 are respectively connected to the compressed air inlet 5, the pure water inlet 6 and one end of the circulating pump 8 for controlling the inflow of compressed air and pure water. The seventh pneumatic valve V7, the eighth pneumatic valve V8 and the ninth pneumatic valve V9 are respectively connected to the first steam inlet 4-1, the second steam inlet 4-2 and the first steam trap 9-1 for controlling the inflow of steam and the discharge of condensed water. The tenth pneumatic valve V10 and the eleventh pneumatic valve V11 are respectively connected to the safety valve 10 and the second steam trap 9-2 for controlling the switching of the safety valve and the steam trap.

[0040] Specifically, the working process of the precise temperature control system of the liquid preparation tank jacket of this embodiment is as follows:

[0041] (1) Sterilization temperature rise process: Open the ninth pneumatic valve V9 and the eleventh pneumatic valve V11, close the fourth pneumatic valve V4, the fifth pneumatic valve V5, the eighth pneumatic valve V8, the seventh pneumatic valve V7, and the tenth pneumatic valve V10, and enter the sterilization temperature rise process. The first temperature sensor 12-1 determines that the temperature inside the liquid preparation tank 1 meets the sterilization requirements. After the tank body is sterilized, close the ninth pneumatic valve V9 and the eleventh pneumatic valve V11, open the fourth pneumatic valve V4, connect compressed air, and blow dry the jacket. After the purge is completed, close the fourth pneumatic valve V4, open the fifth pneumatic valve V5, the fifth pneumatic valve V6, the sixth pneumatic valve V7, and the tenth pneumatic valve V10, and inject pure water into the jacket. The liquid level sensor 13 and the pipeline sight glass 14 determine the water level in the jacket. Close V5 and V6, start the circulation pump 8, and the jacket medium circulates automatically. The first temperature sensor 12-1 and the second temperature sensor 12-2 jointly control the first pneumatic valve V1, the second pneumatic valve V2 and the third pneumatic valve V3 to ensure accurate temperature control of the liquid dispensing tank jacket.

[0042] (2) Liquid preparation and temperature control process: According to the requirements of liquid preparation, the temperature range in the liquid preparation tank 1 is set, and the first temperature sensor 12-1 and the second temperature sensor 12-2 jointly control the switching states of the first pneumatic valve V1, the second pneumatic valve V2 and the third pneumatic valve V3. According to the changes in the temperature in the liquid preparation tank 1 and the medium temperature at the outlet of the circulating pump 8, the flow rates of the refrigerant, compressed air, pure water and steam are automatically adjusted to ensure that the temperature of the jacket of the liquid preparation tank 1 is stable within the set range.

[0043] Embodiment 2:

[0044] like Figure 1As shown, as a preferred embodiment of the above embodiment, the switch states of the first pneumatic valve V1, the second pneumatic valve V2, the third pneumatic valve V3, the fourth pneumatic valve V4, the fifth pneumatic valve V5, the sixth pneumatic valve V6, the seventh pneumatic valve V7, the eighth pneumatic valve V8, the ninth pneumatic valve V9, the tenth pneumatic valve V10 and the eleventh pneumatic valve V11 are controlled by the first temperature sensor 12-1 and the second temperature sensor 12-2. The first temperature sensor 12-1 and the second temperature sensor 12-2 are connected to the controller, and the controller is also connected to the liquid level sensor 13, the pressure gauge 11, the safety valve 10 and the first pneumatic valve V1, the second pneumatic valve V2, the third pneumatic valve V3, the fourth pneumatic valve V4, the fifth pneumatic valve V5, the sixth pneumatic valve V6, the seventh pneumatic valve V7, the eighth pneumatic valve V8, the ninth pneumatic valve V9, the tenth pneumatic valve V10 and the eleventh pneumatic valve V11, and is used to receive the temperature sensor 12-1, the temperature sensor 12-2, the signals of the liquid level sensor 13 and the pressure gauge 11 output control signals according to the set temperature range and liquid level range, so as to control the switching states of the safety valve 10 and the first pneumatic valve V1, the second pneumatic valve V2, the third pneumatic valve V3, the fourth pneumatic valve V4, the fifth pneumatic valve V5, the sixth pneumatic valve V6, the seventh pneumatic valve V7, the eighth pneumatic valve V8, the ninth pneumatic valve V9, the tenth pneumatic valve V10 and the eleventh pneumatic valve V11, so as to realize the automatic control of the precise temperature control system of the liquid dispensing tank jacket.

[0045] The display is connected to the controller to display various parameters of the precise temperature control system of the liquid dispensing tank jacket, such as the temperature inside the liquid dispensing tank, the liquid level inside the jacket, the pressure inside the jacket, the medium temperature at the outlet of the circulating pump, the flow of refrigerant, compressed air, pure water and steam, etc., so that operators can monitor and adjust the operating status of the system more conveniently. It can more intuitively display the working status of the system, improve the visualization and human-computer interaction of the system, and facilitate operators to perform data analysis and fault diagnosis.

[0046] Embodiment 3:

[0047] like Figure 1 As shown, as a preferred embodiment of the above embodiment, the check valve 15 is divided into a first check valve 15-1 and a second check valve 15-2. The first check valve 15-1 is connected to the chilled water inlet interface 3 and the heat exchanger 7 to control the inflow direction of the chilled water; the second check valve 15-2 is connected to the first steam inlet 4-1 and the heat exchanger 7 to control the inflow direction of the steam.

[0048] Embodiment 4:

[0049] like Figure 1 As shown, as a preferred embodiment of the above embodiment, a pipeline sight glass 14 is provided between the first heat exchanger 7-1 and the second heat exchanger 7-2, and a pipeline sight glass 14 is provided between the liquid level sensor 13 and the eighth pneumatic valve V8 for observing the flow of the medium.

[0050] It should be noted that, in this article, the terms "include", "comprises" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. Specific examples are used in this article to illustrate the principle and implementation of the technical solution of the utility model. The above examples are only used to help understand the method and core idea of ​​the utility model. The above are only preferred implementations of the utility model. It should be pointed out that due to the limitations of textual expression and the objective existence of infinite specific structures, for ordinary technicians in this technical field, without departing from the principle of the utility model, several improvements, modifications or changes can be made, and the above technical features can also be combined in an appropriate manner; these improvements, modifications, changes or combinations, or the direct application of the concept and technical solution of the utility model to other occasions without improvement, should be regarded as the protection scope of the utility model.

Claims

1. A precise temperature control system for a liquid preparation tank jacket, comprising a liquid preparation tank (1), characterized in that: The liquid dispensing tank (1) has an open receiving chamber, in which liquid is contained, and a jacket is provided on the outer side of the liquid dispensing tank, in which a medium flows; one end of the jacket is respectively connected to a chilled water return interface (2) and a chilled water inlet interface (3); one end of the jacket and one end of the heat exchanger (7) are both provided with a steam inlet (4); the other end of the jacket is provided with a compressed air inlet (5), a pure water inlet (6), a liquid level sensor (13), a safety valve (10) and a pressure gauge (11); A heat exchanger (7) is provided at one end of the steam inlet (4), and the heat exchanger (7) is divided into a first heat exchanger (7-1) and a second heat exchanger (7-2), one end of the first heat exchanger (7-1) is connected to the steam inlet (4), the other end of the first heat exchanger (7-1) is connected to one end of a circulation pump (8), one end of the second heat exchanger (7-2) is connected to a chilled water inlet interface (3), and the other end of the second heat exchanger (7-2) is connected to the other end of the circulation pump (8); a check valve (15) is provided at the outlet of the circulation pump; A steam trap group (9) is provided at one end of the jacket, the steam trap group (9) comprises a first steam trap (9-1) and a second steam trap (9-2), the first steam trap (9-1) is connected to one end of the jacket, and the second steam trap (9-2) is connected to one end of the heat exchanger (7); One end of the liquid preparation tank (1) and one end of the circulation pump (8) are both provided with temperature sensors (12).

2. The precise temperature control system for the jacket of the liquid preparation tank according to claim 1 is characterized in that: The check valve (15) is divided into a first check valve (15-1) and a second check valve (15-2). The first check valve (15-1) is connected to the chilled water inlet interface (3) and the heat exchanger (7) to control the inflow direction of the chilled water; the second check valve (15-2) is connected to the first steam inlet (4-1) and the heat exchanger (7) to control the inflow direction of the steam.

3. The precise temperature control system for the jacket of the liquid preparation tank according to claim 1 is characterized in that: A pipeline sight glass (14) is provided between the first heat exchanger (7-1) and the second heat exchanger (7-2), and a pipeline sight glass (14) is provided between the liquid level sensor (13) and the eighth pneumatic valve V8.

4. The precise temperature control system for the jacket of the liquid preparation tank according to claim 1 is characterized in that: The steam inlet (4) is divided into a first steam inlet (4-1) and a second steam inlet (4-2). The first steam inlet (4-1) is connected to one end of the jacket, and the second steam inlet (4-2) is connected to one end of the heat exchanger (7).

5. The precise temperature control system for the jacket of the liquid preparation tank according to claim 1 is characterized in that: The pneumatic valves include a first pneumatic valve V1 to an eleventh pneumatic valve V11. The first pneumatic valve V1, the second pneumatic valve V2 and the third pneumatic valve V3 are respectively connected to the first heat exchanger (7-1), the second heat exchanger (7-2) and the chilled water return interface (2) for controlling the flow of the refrigerant. The fourth pneumatic valve V4, the fifth pneumatic valve V5 and the sixth pneumatic valve V6 are respectively connected to the compressed air inlet (5), the pure water inlet (6) and one end of the circulating pump (8) for controlling the inflow of compressed air and pure water. The seventh pneumatic valve V7, the eighth pneumatic valve V8 and the ninth pneumatic valve V9 are respectively connected to the first steam inlet (4-1), the second steam inlet (4-2) and the first steam trap (9-1) for controlling the inflow of steam and the discharge of condensed water. The tenth pneumatic valve V10 and the eleventh pneumatic valve V11 are respectively connected to the safety valve (10) and the second steam trap (9-2) for controlling the switching of the safety valve and the steam trap.

6. The precise temperature control system for the jacket of the liquid preparation tank according to claim 1 is characterized in that: The temperature sensor (12) comprises a first temperature sensor (12-1) and a second temperature sensor (12-2), wherein the first temperature sensor (12-1) is connected to one end of the liquid mixing tank (1), and the second temperature sensor (12-2) is connected to one end of the circulation pump (8).

7. The precise temperature control system for the jacket of the liquid preparation tank according to claim 6 is characterized in that: The switching states of the first pneumatic valve V1, the second pneumatic valve V2, the third pneumatic valve V3, the fourth pneumatic valve V4, the fifth pneumatic valve V5, the sixth pneumatic valve V6, the seventh pneumatic valve V7, the eighth pneumatic valve V8, the ninth pneumatic valve V9, the tenth pneumatic valve V10 and the eleventh pneumatic valve V11 are jointly controlled by the first temperature sensor (12-1) and the second temperature sensor (12-2).

Images