Vacuum energy-saving complete device

Abstract

The utility model relates to a vacuum pump technical field, it is a kind of vacuum energy-saving complete device, it includes air-cooled roots pump, gas condenser, vacuum pump unit, PLC controller, air-cooled roots pump left side first import fixed communication has air inlet pipeline, air-cooled roots pump bottom outlet and gas condenser top import between fixed communication have first gas pipeline, gas condenser top outlet and vacuum pump unit first import between fixed communication have second gas pipeline, vacuum pump unit outlet fixed communication has exhaust pipe line, gas condenser bottom outlet and vacuum pump unit second import between fixed communication have water delivery pipeline, air-cooled roots pump adopts variable-frequency speed-regulating motor, air-cooled roots pump, vacuum pump unit all are electrically connected with PLC controller.The utility model is reasonable and compact in structure, convenient to use, and it realizes the accurate control of vacuum energy-saving complete device, improves equipment operation effect by setting gas condenser, multi-parameter monitoring system.

Description

Technical Field

[0001] This utility model relates to the field of vacuum pump technology and is a complete set of vacuum energy-saving devices. Background Technology

[0002] Roots vacuum pump units possess a series of outstanding performance advantages, making them stand out in the vacuum pump market. Their unique rotor structure and working principle enable highly efficient pumping. Roots vacuum pump units can achieve high vacuum levels, reaching 150 mbar in single-pump mode. Through multi-stage series configuration, they can meet even higher vacuum requirements, providing strong support for precision manufacturing and scientific research experiments with extremely high vacuum requirements. The cycloidal structure and high-precision machining processes employed in Roots vacuum pump units effectively reduce vibration and noise during operation, ensuring stable performance under long-term, high-load operation. Simultaneously, advanced gas cooling technology allows for timely dissipation of heat generated during gas compression, preventing equipment failure due to overheating and ensuring production continuity.

[0003] In existing technologies, the cooling structure of Roots vacuum pump units is simple. Early series units only have a single-stage cooler (such as a tubular heat exchanger), which cannot simultaneously meet the cooling and steam condensation requirements of the air-cooled Roots pump. The air-cooled Roots pump is prone to overheating due to high pressure differential overload. In addition, when the air-cooled Roots pump is started at a traditional fixed frequency, the motor starts directly at full voltage, which cannot effectively adapt to the application scenario. The starting current can reach 5 to 7 times the rated current, causing the air-cooled Roots pump rotor to be subjected to instantaneous impact force, which can easily damage the equipment.

[0004] Therefore, it is essential to invent a complete set of vacuum energy-saving devices. Summary of the Invention

[0005] This utility model provides a vacuum energy-saving complete set of equipment, which overcomes the shortcomings of the above-mentioned prior art. It can effectively solve the problems of low operating efficiency, poor heat exchange effect and easy damage to equipment caused by rated start-up in the existing Roots vacuum pump units.

[0006] The technical solution of this utility model is achieved through the following measures: A vacuum energy-saving complete set of equipment includes an air-cooled Roots pump, a gas condenser, a vacuum pump unit, and a PLC controller. An air inlet pipeline is fixedly connected to the first inlet on the left side of the air-cooled Roots pump. A first gas pipeline is fixedly connected between the bottom outlet of the air-cooled Roots pump and the top inlet of the gas condenser. A second gas pipeline is fixedly connected between the top outlet of the gas condenser and the first inlet of the vacuum pump unit. An exhaust pipeline is fixedly connected to the outlet of the vacuum pump unit. A water supply pipeline is fixedly connected between the bottom outlet of the gas condenser and the second inlet of the vacuum pump unit. Both the air-cooled Roots pump and the vacuum pump unit are electrically connected to the PLC controller.

[0007] The following are further optimizations and / or improvements to the above-mentioned utility model technical solution: The aforementioned air-cooled Roots pump uses a variable frequency speed control motor.

[0008] The above-mentioned air intake pipeline is fixedly equipped with a filter, a regulating valve, and a first pressure gauge in sequence according to the direction of medium flow.

[0009] The first cooling water supply pipeline is fixedly connected to the second inlet on the left side of the aforementioned air-cooled Roots pump, and the first cooling water return pipeline is fixedly connected to the left outlet of the air-cooled Roots pump. The second cooling water supply pipeline is fixedly connected to the left inlet of the gas condenser, and the second cooling water return pipeline is fixedly connected to the left outlet of the gas condenser.

[0010] The aforementioned vacuum pump unit includes a water ring vacuum pump, a gas-liquid separator, and a heat exchanger. A second gas pipeline is fixedly connected between the first inlet on the left side of the water ring vacuum pump and the top outlet of the gas condenser. A water pipeline is fixedly connected between the second inlet on the left side of the water ring vacuum pump and the bottom outlet of the gas condenser. A third gas pipeline is fixedly connected between the right outlet of the water ring vacuum pump and the upper inlet of the gas-liquid separator. A first working water pipeline is fixedly connected between the lower outlet of the gas-liquid separator and the upper inlet of the heat exchanger. A second working water pipeline is fixedly connected between the upper outlet of the heat exchanger and the third inlet on the left side of the water ring vacuum pump.

[0011] A vacuum breaking pipeline is fixedly connected to the aforementioned second gas pipeline, and a vacuum breaking valve is fixedly installed on the vacuum breaking pipeline. A check valve and a second pressure gauge are fixedly installed on the second gas pipeline between the vacuum breaking pipeline and the water ring vacuum pump in sequence according to the flow direction of the medium. A third pressure gauge is fixedly installed on the exhaust pipeline.

[0012] The bottom outlet of the aforementioned water ring vacuum pump is fixedly connected to a first drainage pipeline, the top outlet of the gas-water separator is fixedly connected to an exhaust pipeline, the middle outlet of the gas-water separator is fixedly connected to a second drainage pipeline between the first drainage pipeline, and the middle inlet of the gas-water separator is fixedly connected to a water replenishment pipeline.

[0013] The gas-liquid separator is fixedly equipped with a first level gauge and a second level gauge, a water supply valve is fixedly installed on the water supply pipeline, and a level regulating valve is fixedly installed on the second drainage pipeline.

[0014] The heat exchanger is fixedly connected to a third cooling water supply pipeline on the left side inlet and a third cooling water return pipeline on the right side outlet. A first temperature gauge and a fourth pressure gauge are fixedly installed on the second working water pipeline in sequence according to the flow direction of the medium.

[0015] The aforementioned regulating valve, first pressure gauge, vacuum breaking valve, second pressure gauge, first level gauge, second level gauge, water supply valve, level regulating valve, third pressure gauge, first temperature gauge, and fourth pressure gauge are all electrically connected to the PLC controller. An interlock is provided between the regulating valve, the air-cooled Roots pump, and the second pressure gauge. An interlock is also provided between the first level gauge, the second level gauge, the water supply valve, and the level regulating valve.

[0016] This utility model has a reasonable and compact structure and is easy to use. Through multi-parameter monitoring and variable frequency speed control motor, it realizes precise control of vacuum energy-saving complete set of equipment, extends the service life of equipment, and sets up a gas condenser to cool the mixed gas, reduce heat transfer, and make the water vapor in the mixed gas at the outlet of the gas-cooled Roots pump quickly condense into water, thereby greatly improving the operating effect of the vacuum pump. Attached Figure Description

[0017] Appendix Figure 1 This is a schematic diagram of the process flow of this utility model.

[0018] The codes in the attached diagram are as follows: 1 for air-cooled Roots pump, 2 for gas condenser, 3 for inlet line, 4 for first gas line, 5 for second gas line, 6 for exhaust line, 7 for water supply line, 8 for filter, 9 for regulating valve, 10 for first pressure gauge, 11 for vacuum breaking line, 12 for vacuum breaking valve, 13 for check valve, 14 for second pressure gauge, 15 for third pressure gauge, 16 for first cooling water supply line, 17 for first cooling water return line, 18 for second cooling water supply line, and 19 for the second... 20 is the cooling water return pipeline, 21 is the water ring vacuum pump, 22 is the gas-water separator, 23 is the heat exchanger, 24 is the third gas pipeline, 25 is the first working water pipeline, 26 is the second working water pipeline, 27 is the water supply pipeline, 28 is the second drainage pipeline, 29 is the first level gauge, 30 is the second level gauge, 31 is the water supply valve, 32 is the level regulating valve, 33 is the third cooling water supply pipeline, 34 is the third cooling water return pipeline, 35 is the first temperature gauge, and 36 is the fourth pressure gauge. Detailed Implementation

[0019] This utility model is not limited to the following embodiments, and the specific implementation method can be determined according to the technical solution of this utility model and the actual situation.

[0020] Unless otherwise specified, all equipment and devices used in this invention are existing, publicly known, and commonly used equipment and devices in the field.

[0021] In this utility model, for ease of description, the description of the relative positions of the components is based on the appendix to the specification. Figure 1 The layout is described using a diagrammatic method, such as the positional relationships of front, back, top, bottom, left, and right, which are based on the instructions attached. Figure 1The orientation of the layout is determined by the direction of the map.

[0022] The present invention will be further described below with reference to the embodiments and accompanying drawings: Example 1: As shown in the attached document Figure 1 As shown, the vacuum energy-saving complete set of equipment includes an air-cooled Roots pump 1, a gas condenser 2, a vacuum pump unit, and a PLC controller. The first inlet on the left side of the air-cooled Roots pump 1 is fixedly connected to an inlet pipe 3. The bottom outlet of the air-cooled Roots pump 1 is fixedly connected to the top inlet of the gas condenser 2 via a first gas pipe 4. The top outlet of the gas condenser 2 is fixedly connected to the first inlet of the vacuum pump unit via a second gas pipe 5. The outlet of the vacuum pump unit is fixedly connected to an exhaust pipe 6. The bottom outlet of the gas condenser 2 is fixedly connected to the second inlet of the vacuum pump unit via a water supply pipe 7. Both the air-cooled Roots pump 1 and the vacuum pump unit are electrically connected to the PLC controller.

[0023] In this invention, the vacuum pump unit first pumps the inlet pressure of the air-cooled Roots pump 1 to its permissible inlet pressure before starting the air-cooled Roots pump 1, thus forming a series operation of the air-cooled Roots pump 1 and the vacuum pump unit in the vacuum energy-saving complete set of equipment. After the air-cooled Roots pump 1 starts, the medium to be processed enters the air-cooled Roots pump 1 through the inlet pipeline 3. The gas discharged from the air-cooled Roots pump 1 enters the gas condenser 2 through the first gas pipeline 4. After gas-water separation, the gas is discharged through the second gas pipeline 5 and enters the vacuum pump unit. After being processed by the vacuum pump unit, it is sent out through the exhaust pipeline 6. The condensate on the gas side is automatically extracted by the negative pressure of the vacuum pump unit through the water supply pipeline 7.

[0024] The above-mentioned vacuum energy-saving complete set of equipment can be further optimized and / or improved according to actual needs: Example 2: Its difference from Example 1 is as follows: (See attached) Figure 1 As shown, the air-cooled Roots pump 1 uses a variable frequency speed control motor.

[0025] As needed, the first gas line 4 can be made of metal bellows. The air-cooled Roots pump 1 is equipped with a dual rotor, which is known in the art. Relying on the volume change formed by the synchronous counter-rotation of the dual rotors, the rotors draw in gas from the suction port and squeeze the gas to the exhaust port as they rotate. The pumping rate is linearly positively correlated with the rotor speed (the higher the speed, the more times the rotor volume changes per unit time, and the greater the pumping rate). The air-cooled Roots pump 1 uses a variable frequency speed control motor. The PLC controller adjusts the output frequency of the variable frequency speed control motor as needed to control the dynamic matching between the rotor speed and the pumping rate of the air-cooled Roots pump 1, thereby achieving precise control.

[0026] Example 3: Its difference from Examples 1 to 2 is as follows: (See attached) Figure 1 As shown, the intake pipeline 3 is fixedly equipped with a filter 8, a regulating valve 9, and a first pressure gauge 10 in sequence according to the direction of medium flow.

[0027] As needed, the medium to be processed entering the air-cooled Roots pump 1 is filtered by filter 8, and the medium delivery rate entering the air-cooled Roots pump 1 is adjusted by regulating valve 9.

[0028] Example 4: Its difference from Examples 1 to 3 is as follows: (See attached) Figure 1 As shown, the second inlet on the left side of the air-cooled Roots pump 1 is fixedly connected to the first cooling water supply line 16, the outlet on the left side of the air-cooled Roots pump 1 is fixedly connected to the first cooling water return line 17, the inlet on the left side of the gas condenser 2 is fixedly connected to the second cooling water supply line 18, and the outlet on the left side of the gas condenser 2 is fixedly connected to the second cooling water return line 19.

[0029] As needed, before starting the air-cooled Roots pump 1, cooling water is introduced into the air-cooled Roots pump 1 through the first cooling water supply line 16 to fully cool the rotor and pump body installed inside the air-cooled Roots pump 1; before starting the air-cooled Roots pump 1, cooling water is introduced into the gas condenser 2 through the second cooling water supply line 18, firstly to cool the mixed gas discharged from the air-cooled Roots pump 1 and reduce heat transfer; secondly, to cause the water vapor in the mixed gas to condense into water quickly, thereby greatly improving the efficiency of the air-cooled Roots pump 1.

[0030] Example 5: It differs from Examples 1 to 4 in that, as shown in the appendix... Figure 1 As shown, the vacuum pump unit includes a water ring vacuum pump 20, a gas-water separator 21, and a heat exchanger 22. A second gas pipeline 5 is fixedly connected between the first inlet on the left side of the water ring vacuum pump 20 and the top outlet of the gas condenser 2. A water supply pipeline 7 is fixedly connected between the second inlet on the left side of the water ring vacuum pump 20 and the bottom outlet of the gas condenser 2. An exhaust pipeline 6 is fixedly connected to the top outlet of the gas-water separator 21. A third gas pipeline 23 is fixedly connected between the right outlet of the water ring vacuum pump 20 and the upper inlet of the gas-water separator 21. A first working water pipeline 24 is fixedly connected between the lower outlet of the gas-water separator 21 and the upper inlet of the heat exchanger 22. A second working water pipeline 25 is fixedly connected between the upper outlet of the heat exchanger 22 and the third inlet on the left side of the water ring vacuum pump 20.

[0031] As needed, the gas after gas-liquid separation in the gas condenser 2 enters the water ring vacuum pump 20 through the second gas pipeline 5. After being processed by the water ring vacuum pump 20, it enters the gas-liquid separator 21 through the third gas pipeline 23. After further gas-liquid separation, the gas is sent out through the exhaust pipeline 6, and the liquid enters the heat exchanger 22 through the first working water pipeline 24 for heat exchange and cooling. Then, it flows back to the water ring vacuum pump 20 through the second working water pipeline 25 for recycling.

[0032] Example 6: Its difference from Examples 1 to 5 is as follows: (See attached) Figure 1As shown, a vacuum breaking pipeline 11 is fixedly connected to the second gas pipeline 5, a vacuum breaking valve 12 is fixedly installed on the vacuum breaking pipeline 11, a check valve 13 and a second pressure gauge 14 are fixedly installed on the second gas pipeline 5 between the vacuum breaking pipeline 11 and the water ring vacuum pump 20 in sequence according to the medium flow direction, and a third pressure gauge 15 is fixedly installed on the exhaust pipeline 6.

[0033] As needed, stop the air-cooled Roots pump 1, close the regulating valve 9, open the vacuum breaking valve 12 to break the vacuum, and then stop the water ring vacuum pump 20 after a 30-second delay. By introducing atmospheric air into the second gas line 5, gradually balance the pressure at the "inlet (high vacuum)" and "outlet (water ring vacuum pump 20 side)" of the air-cooled Roots pump 1 until the entire system pressure is close to atmospheric pressure. At this point, stop the water ring vacuum pump 20 to eliminate the pressure difference of the air-cooled Roots pump 1. The rotor of the air-cooled Roots pump 1 will not be squeezed in the reverse direction, and the core components (rotor, pump chamber, seals) are protected. The system pressure is balanced with the atmosphere, there is no negative pressure suction, and the working fluid of the water ring vacuum pump 20 and the external atmosphere cannot flow back, ensuring the cleanliness of the system. The system pressure is close to atmospheric pressure, and the water ring vacuum pump 20 can be started directly next time without overcoming the pressure difference, avoiding motor overload, and meeting the requirement of "low inlet pressure start" for Roots pumps, leaving safe conditions for the next start.

[0034] Before the water ring vacuum pump 20 starts and begins to intake, the differential pressure between the inlet and outlet of the water ring vacuum pump 20 (the difference between the second pressure gauge 14 and the third pressure gauge 15) shall not be lower than -60 kPa.

[0035] Example 7: Its difference from Examples 1 to 6 is as follows: (See attached) Figure 1 As shown, the bottom outlet of the water ring vacuum pump 20 is fixedly connected to the first drainage pipeline 26, the middle outlet of the gas-water separator 21 is fixedly connected to the first drainage pipeline 26, and the middle inlet of the gas-water separator 21 is fixedly connected to the water supply pipeline 27.

[0036] As needed, before the water ring vacuum pump 20 is started, water is added to the gas-water separator 21 through the water supply line 27. When the water level in the gas-water separator 21 is high, it is discharged through the second drain line 28.

[0037] Example 8: It differs from Examples 1 to 7 in that: as shown in the appendix Figure 1 As shown, a first level gauge 29 and a second level gauge 30 are fixedly installed on the gas-liquid separator 21, a water supply valve 31 is fixedly installed on the water supply line 27, and a level regulating valve 32 is fixedly installed on the second drainage line 28.

[0038] As needed, a magnetic float level gauge can also be installed on the gas-water separator 21 to directly observe the liquid level of the gas-water separator 21 on site. The second level gauge 30 can be a differential pressure level gauge.

[0039] Example 9: It differs from Examples 1 to 8 in that: as shown in the appendix Figure 1 As shown, the left inlet of heat exchanger 22 is fixedly connected to the third cooling water supply pipeline 33, and the right outlet of heat exchanger 22 is fixedly connected to the third cooling water return pipeline 34. The second working water pipeline 25 is fixedly equipped with a first temperature gauge 35 and a fourth pressure gauge 36 in sequence according to the flow direction of the medium.

[0040] As needed, cooling water is supplied to the heat exchanger 22 through the third cooling water supply pipeline 33 to cool the circulating working water of the water ring vacuum pump 20, ensuring that the working water can be circulated and used at a lower temperature.

[0041] Based on the data detected by the first temperature gauge 35 and the operating conditions of the water ring vacuum pump 20, the anti-cavitation threshold of the water ring vacuum pump 20 is set. If the data detected by the fourth pressure gauge 36 is lower than the anti-cavitation threshold, the cooling water flow of the heat exchanger 22 can be increased, or the operating parameters of the water ring vacuum pump 20 can be adjusted to quickly increase the local pressure inside the water ring vacuum pump 20 and prevent cavitation from occurring.

[0042] Example 10: It differs from Examples 1 to 9 in that, as shown in the appendix... Figure 1 As shown, regulating valve 9, first pressure gauge 10, vacuum breaking valve 12, second pressure gauge 14, first level gauge 29, second level gauge 30, water supply valve 31, level regulating valve 32, third pressure gauge 15, first temperature gauge 35, and fourth pressure gauge 36 are all electrically connected to the PLC controller. An interlock is provided between regulating valve 9, air-cooled Roots pump 1, and second pressure gauge 14. An interlock is also provided between first level gauge 29, second level gauge 30, water supply valve 31, and level regulating valve 32.

[0043] As needed, after the water ring vacuum pump 20 is started, when the suction pressure (i.e. the pressure of the second pressure gauge 14) reaches 10 kPa (this value can be adjusted according to the on-site working conditions), the air-cooled Roots pump 1 is started. When the second pressure gauge 14 reaches 7 kPa, the regulating valve 9 is opened, and the vacuum energy-saving complete set of equipment is connected to the system for operation.

[0044] The liquid level of the gas-water separator 21 is detected by the dual liquid level gauges 29 and 30. By comparing the values ​​detected by the two gauges, when the liquid level of the gas-water separator 21 is lower than 15%, the water supply valve 31 is opened to supply water. When the liquid level of the gas-water separator 21 is higher than 80%, the liquid level regulating valve 32 is opened.

[0045] Depending on the needs, the various pipelines and equipment of this vacuum energy-saving complete set of equipment can also be equipped with conventional valves, thermometers, and pressure gauges that are known and commonly used in the field, according to production requirements. The PLC controller can be a Siemens S7-1500, which is equipped with a Yokogawa CS3000 DCS control system.

[0046] The above technical features constitute various embodiments of this utility model, which have strong adaptability and implementation effect. Unnecessary technical features can be added or removed according to actual needs to meet the needs of different situations.

[0047] The usage process of this utility model is as follows: First, the required amount of liquid is added to the gas-liquid separator 21 through the water supply line 27, and cooling water is introduced into the heat exchanger 22, gas condenser 2, and air-cooled Roots pump 1 through the third cooling water supply line 33, the second cooling water supply line 18, and the first cooling water supply line 16, respectively. Working water is introduced into the water ring vacuum pump 20 through the first working water line 24 and the second working water line 25. Next, the water ring vacuum pump 20 is started, and the inlet pressure of the water ring vacuum pump 20 is drawn to the allowable inlet pressure of the air-cooled Roots pump 1, and then the air-cooled Roots pump 1 is started. Finally, the regulating valve 9 is opened, and the medium to be treated enters the air-cooled Roots pump 1 through the air inlet line 3, and the vacuum energy-saving complete set of equipment is connected to the system for operation.

Claims

1. A vacuum energy-saving complete set of equipment, characterized in that... The system includes an air-cooled Roots pump, a gas condenser, a vacuum pump unit, and a PLC controller. The first inlet on the left side of the air-cooled Roots pump is fixedly connected to an inlet pipeline. The bottom outlet of the air-cooled Roots pump is fixedly connected to the top inlet of the gas condenser, and the top outlet of the gas condenser is fixedly connected to the first inlet of the vacuum pump unit. The outlet of the vacuum pump unit is fixedly connected to an exhaust pipeline, and the bottom outlet of the gas condenser is fixedly connected to the second inlet of the vacuum pump unit. Both the air-cooled Roots pump and the vacuum pump unit are electrically connected to the PLC controller.

2. The vacuum energy-saving complete set of equipment according to claim 1, characterized in that... The air-cooled Roots pump uses a variable frequency speed control motor.

3. The vacuum energy-saving complete set of equipment according to claim 1 or 2, characterized in that... A filter, regulating valve, and first pressure gauge are fixedly installed on the air intake pipeline in sequence according to the direction of medium flow.

4. The vacuum energy-saving complete set of equipment according to claim 3, characterized in that... The second inlet on the left side of the air-cooled Roots pump is fixedly connected to the first cooling water supply line, and the outlet on the left side of the air-cooled Roots pump is fixedly connected to the first cooling water return line. The inlet on the left side of the gas condenser is fixedly connected to the second cooling water supply line, and the outlet on the left side of the gas condenser is fixedly connected to the second cooling water return line.

5. The vacuum energy-saving complete set of equipment according to claim 1, 2, or 4, characterized in that... The vacuum pump unit includes a water ring vacuum pump, a gas-liquid separator, and a heat exchanger. A second gas pipeline is fixedly connected between the first inlet on the left side of the water ring vacuum pump and the top outlet of the gas condenser. A water pipeline is fixedly connected between the second inlet on the left side of the water ring vacuum pump and the bottom outlet of the gas condenser. A third gas pipeline is fixedly connected between the right outlet of the water ring vacuum pump and the upper inlet of the gas-liquid separator. A first working water pipeline is fixedly connected between the lower outlet of the gas-liquid separator and the upper inlet of the heat exchanger. A second working water pipeline is fixedly connected between the upper outlet of the heat exchanger and the third inlet on the left side of the water ring vacuum pump.

6. The vacuum energy-saving complete set of equipment according to claim 5, characterized in that... A vacuum breaking line is fixedly connected to the second gas pipeline, and a vacuum breaking valve is fixedly installed on the vacuum breaking line. A check valve and a second pressure gauge are fixedly installed on the second gas pipeline between the vacuum breaking line and the water ring vacuum pump in sequence according to the flow direction of the medium. A third pressure gauge is fixedly installed on the exhaust line.

7. The vacuum energy-saving complete set of equipment according to claim 6, characterized in that... The bottom outlet of the water ring vacuum pump is fixedly connected to the first drainage pipeline, the top outlet of the gas-water separator is fixedly connected to the exhaust pipeline, the middle outlet of the gas-water separator is fixedly connected to the first drainage pipeline, and the middle inlet of the gas-water separator is fixedly connected to the water replenishment pipeline.

8. The vacuum energy-saving complete set of equipment according to claim 6 or 7, characterized in that... The gas-liquid separator is fixedly equipped with a first level gauge and a second level gauge, a water supply valve is fixedly installed on the water supply pipeline, and a level regulating valve is fixedly installed on the second drainage pipeline.

9. The vacuum energy-saving complete set of equipment according to claim 8, characterized in that... The heat exchanger has a fixed connection to a third cooling water supply pipeline on the left inlet and a fixed connection to a third cooling water return pipeline on the right outlet. A first temperature gauge and a fourth pressure gauge are fixedly installed on the second working water pipeline in sequence according to the flow direction of the medium.

10. The vacuum energy-saving complete set of equipment according to claim 9, characterized in that... The regulating valve, the first pressure gauge, the vacuum breaking valve, the second pressure gauge, the first level gauge, the second level gauge, the water supply valve, the level regulating valve, the third pressure gauge, the first temperature gauge, and the fourth pressure gauge are all electrically connected to the PLC controller. An interlock is set between the regulating valve, the air-cooled Roots pump, and the second pressure gauge. An interlock is set between the first level gauge, the second level gauge, the water supply valve, and the level regulating valve.

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