Gas-liquid separator and vacuum system using same
By designing specific filler baskets and gas-liquid-separable fillers, the complete separation of the gas phase and liquid phase is achieved when the inlet pressure of the liquid ring pump is high, and the problem of poor gas-liquid separation effect in the prior art is solved, which reduces liquid consumption and pollution, and improves system efficiency.
Patent Information
- Application Number
- CN202311669791.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-06
- Publication Date
- 2025-06-06
AI Technical Summary
The prior art cannot fully realize gas-liquid separation in the presence of high pressure on the inlet of the liquid ring pump, resulting in poor gas-liquid separation effect, increasing the consumption of working liquid and contamination caused by liquid discharge.
A gas-liquid separator is designed, using a specific filler basket and a gas-liquid separation filler. The filler in the filler basket is dispersed and recondensed liquid to achieve complete separation of the gas phase and the liquid phase.
In the case where the inlet pressure of the liquid ring pump is high, the complete separation of the gas phase and the liquid phase is achieved, reducing the consumption of working liquid and the pollution caused by liquid discharge, and improving the efficiency of the system.
Smart Images
Figure CN120094332A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to a gas-liquid separator, in particular to a gas-liquid separator and a vacuum system using the gas-liquid separator. Background Art
[0002] In the current application of vacuum systems with liquid ring pumps, when the liquid ring pump is exhausted, the working liquid in the liquid ring pump will be discharged along with the gas. After long-term use, the working liquid in the liquid ring pump will become less and less, resulting in the need to replenish the working liquid in the liquid ring pump in a timely manner, which not only increases the operating cost, but also reduces the working efficiency.
[0003] In order to solve the above problems, a gas-liquid separator that uses gravity to separate gas and liquid is commonly used in the prior art. Although the gas-liquid separator can meet the general requirements in current use, in some occasions where the inlet pressure of the liquid ring pump is high, this technology cannot completely achieve gas-liquid separation, so the gas-liquid separation effect is still very poor.
[0004] Therefore, the present invention hopes to provide a new gas-liquid separator and a vacuum system using the gas-liquid separator to solve the above-mentioned defects in the prior art. Summary of the invention
[0005] Therefore, the purpose of the present invention is to solve the above-mentioned problems in the prior art. The present invention proposes a gas-liquid separator and a vacuum system using the gas-liquid separator. The advantage of the present invention is that the gas-liquid separator has a special design structure of a specific filler basket and a gas-liquid separable filler. In some occasions where the inlet pressure of the liquid ring pump is high, the filler basket and the filler can be used to achieve complete separation of the gas phase and the liquid phase. Therefore, the consumption of working liquid is reduced, and the pollution caused by liquid discharge is also reduced. The present invention can be used in various vacuum systems, and the fluid extracted by the system passes through the gas-liquid separator of the present invention, and the working fluid of the liquid ring pump is supplemented after the liquid is separated, making the overall system more efficient.
[0006] In order to achieve the above-mentioned purpose, the present invention proposes a gas-liquid separator, comprising: a gas-liquid separator cylinder; a gas-liquid separator top cover for sealing the upper opening of the gas-liquid separator cylinder, wherein the gas-liquid separator top cover has a coverable opening as the exhaust port of the entire gas-liquid separator cylinder; a filler basket is a basket in the gas-liquid separator cylinder, which contains at least one filler; the filler is a filler that can separate gas and liquid; wherein the cylinder body of the gas-liquid separator cylinder forms a gas-liquid inlet, and its position corresponds to the bottom of the filler basket; the gas-liquid inlet is connected to the gas-liquid outlet of the upper-level device through a gas-liquid pipeline, and a liquid outlet is formed on the cylinder body of the gas-liquid separator cylinder and the liquid is output through a liquid circulation pipeline; The position of the liquid outlet is lower than the position of the gas-liquid inlet; during operation, the fluid from a fluid output device enters the gas-liquid separator cylinder through the gas-liquid inlet of the gas-liquid separator cylinder, wherein the liquid with larger particles in the fluid directly drips to the bottom of the gas-liquid separator cylinder, while the gas containing the liquid with tiny particles naturally floats upward and passes through the packing basket; when the gas containing the liquid with tiny particles contacts the packing basket, the liquid with tiny particles is dispersed by the packing in the packing basket and re-condenses on the surface of the packing to form a liquid, and then drips to the bottom of the gas-liquid separator cylinder and flows out from the liquid outlet below, while the gas containing almost no liquid floats upward and is discharged from the exhaust port.
[0007] Furthermore, it also includes a partition plate, which is located at the upper opening of the gas-liquid separator cylinder, and the partition plate does not contact the inner wall surface of the gas-liquid separator cylinder; the filling basket is placed above the partition plate.
[0008] Furthermore, the fluid is any form of fluid medium, including gas, saturated steam, and unsaturated steam.
[0009] Furthermore, the filler is made of polypropylene plastic.
[0010] Furthermore, the packing basket and the packing form a structure that prevents gas and liquid from passing directly and unhindered from any direction.
[0011] Furthermore, the filler is a spherical multi-faceted hollow filler ball; the appearance of the multi-faceted hollow filler ball is spherical, and it is divided into an upper hemisphere and a lower hemisphere, and each hemisphere is composed of a plurality of radial blades; and the radial blades are spaced apart from each other and are hollow, so that the fluid can enter from either end, and after passing through the obstruction of the radial blades, the fluid acts on the filler, so that the liquid and gas in the fluid can be separated.
[0012] Furthermore, a mounting hole is formed on the cylinder body of the gas-liquid separator cylinder, which is used to mount a liquid level meter.
[0013] Furthermore, the fluid output device is a condenser, the gas-liquid separator is connected to an output end of the condenser through the gas-liquid pipeline, and the gas-liquid separator separates the fluid output from the condenser into air and liquid water, and then outputs the air and liquid water.
[0014] The present invention also includes a vacuum system using the above-mentioned gas-liquid separator, and the vacuum system, in addition to the gas-liquid separator, also includes: a liquid ring pump, the liquid ring pump includes at least one inlet and at least one exhaust port; an inlet of the liquid ring pump is connected to an air intake pipeline; a Roots vacuum pump group, including at least one Roots vacuum pump, the at least one Roots vacuum pump of the Roots vacuum pump group includes an inlet and an exhaust port, the inlet of the first Roots vacuum pump is connected to the rear end of a vacuum mother pipe of the previous stage system; and when the exhaust port of the last Roots vacuum pump of the Roots vacuum pump group is connected to the inlet of the liquid ring pump through the air intake pipeline; wherein the gas-liquid inlet of the gas-liquid separator is connected to the exhaust port of the liquid ring pump through the gas-liquid pipeline, and in addition, a Roots vacuum pump formed on the cylinder body of the gas-liquid separator is connected to the inlet of the liquid ring pump through the gas-liquid pipeline. The liquid outlet is connected to the inlet of the liquid ring pump through the liquid circulation pipeline; and therefore the fluid from the liquid ring pump enters the gas-liquid separator cylinder through the gas-liquid inlet of the gas-liquid separator cylinder, wherein the liquid with larger particles in the fluid directly drips to the bottom of the gas-liquid separator cylinder, and the gas containing the liquid with tiny particles naturally floats upward and passes through the packing basket; wherein when the gas containing the liquid with tiny particles contacts the packing basket, the liquid with tiny particles is dispersed by the packing in the packing basket and re-condenses on the surface of the packing to form liquid, then drips to the bottom of the gas-liquid separator cylinder and flows out from the liquid outlet below, and then enters the circulation of the working liquid of the liquid ring pump through the liquid circulation pipeline to supplement the loss of the working liquid when the liquid ring pump is working. The gas containing almost no liquid floats upward and is discharged from the exhaust port.
[0015] Furthermore, the Roots vacuum pump group comprises a plurality of Roots vacuum pumps, which are connected in series. The plurality of Roots vacuum pumps connected in series are used to share the pressure difference that each stage of the Roots vacuum pump needs to withstand, thereby sharing the heat generated in the process of compressing air.
[0016] Furthermore, at least one exhaust port cooler or heat exchanger is connected in series between the exhaust port of the last Roots vacuum pump of the Roots vacuum pump group and the air inlet pipeline connected to the liquid ring pump to prevent the compressed gas of the previous stage vacuum pump from generating too high a temperature and affecting the safe operation of the next stage vacuum pump.
[0017] Further, the liquid ring pump is selected from a water ring vacuum pump, a large water ring vacuum pump, or a fore-stage vacuum pump of other forms other than a water ring that can be directly discharged into the atmosphere; A cooler is installed on the liquid circulation pipeline to cool the liquid; and The inlet pressure of the liquid ring pump reaches 10,000 Pa.
[0018] The present invention has at least the following beneficial effects: The inventor has proposed a high-efficiency gas-liquid separator suitable for use in some occasions where the inlet pressure of a liquid ring pump is high. This technology uses a specially designed structure and a filler that can separate the gas and liquid to achieve complete separation of the gas phase and the liquid phase, and prevents the gas from entraining the liquid and discharging it. This reduces the consumption of the working liquid and also reduces the pollution caused by the discharge of the working liquid.
[0019] The features and advantages of the present invention may be further understood from the following description, which is to be read with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] Figure 1 A structural diagram showing a gas-liquid separator of the present invention; Figure 2 A cross-sectional view showing a gas-liquid separator of the present invention; Figure 3 Shows the application examples of the filler of the present invention; Figure 4 A second application example of the gas-liquid separator and the vacuum system of the present invention is shown, wherein the Roots vacuum pump assembly includes only one Roots vacuum pump; Figure 5 The first application example of the gas-liquid separator of the present invention is shown; Figure 6 A second application example of the gas-liquid separator and the vacuum system of the present invention is shown, wherein the Roots vacuum pump group includes a plurality of the Roots vacuum pumps; Figure 7 A schematic diagram showing the working status of the gas-liquid separator of the present invention and the vacuum system.
[0021] Description of Reference Numerals Liquid ring pump 10; air inlet pipeline 11; inlet 12; delivery pipeline 13; inlet 14; exhaust port 16; Roots vacuum pump unit 20; Roots vacuum pump 22; inlet 24; exhaust port 26; Exhaust cooler or heat exchanger 30; Gas-liquid separator 40; filler 41; upper hemisphere 411; lower hemisphere 412; radial blades 413; gas-liquid separator cylinder 42; seat 421; mounting hole 422; gas-liquid inlet 43; gas-liquid separator top cover 44; exhaust port 45; gas-liquid pipeline 451; partition 46; liquid outlet 47; filler basket 48; liquid circulation pipeline 49; Cooler 55; Fluid output device 60; Condenser 80; output end 82. DETAILED DESCRIPTION
[0022] The structural composition of the present invention, as well as the effects and advantages it can produce, are now described in detail as follows with reference to the accompanying drawings, with a preferred embodiment of the present invention.
[0023] Please refer to Figures 1 to 7 As shown, the gas-liquid separator of the present invention and the vacuum system using the gas-liquid separator are shown. Figure 7 As shown, the gas-liquid separator 40 can be connected to a fluid output device 60 including gas and liquid. The gas-liquid separator 40 is used to separate the fluid output by the fluid output device 60 into air and liquid water, and then output the separated air and liquid water. The gas-liquid separator 40 can effectively prevent the gas from entraining a large amount of liquid to be discharged, saving the working circulation fluid in the fluid output device 60.
[0024] The fluid is any form of fluid medium, including gas, saturated steam, unsaturated steam, etc.
[0025] like Figure 1 and Figure 2 As shown, the gas-liquid separator 40 comprises: A gas-liquid separator cylinder 42 is a container of any form that can hold liquid; a seat 421 is provided at the bottom of the gas-liquid separator cylinder 42 .
[0026] A gas-liquid separator top cover 44 is used to seal the upper opening of the gas-liquid separator cylinder 42, wherein the gas-liquid separator top cover 44 has a coverable opening to serve as an exhaust port 45 of the entire gas-liquid separator cylinder 42, and the gas-liquid separator top cover 44 is a cover of any form that can seal a container.
[0027] A partition plate 46 is located in the gas-liquid separator cylinder 42 near its upper opening, and the partition plate 46 does not contact the inner wall surface of the gas-liquid separator cylinder 42 .
[0028] A packing basket 48 is a basket placed inside the gas-liquid separator cylinder 42 and above the partition 46, and contains at least one packing 41. Preferably, the packing 41 is made of polypropylene plastic. The packing basket 48 is a hollow basket in any form that can be filled with the packing 41; the packing 41 is a packing in any form that can separate gas and liquid. Preferably, the packing basket 48 and the packing 41 are any structure that can prevent gas and liquid from passing directly and unimpeded from any direction. For example Figure 3In the example shown, the filler 41 is a multi-faceted hollow filler ball similar to a sphere. The appearance of the multi-faceted hollow filler ball is slightly spherical, and it is divided into an upper hemisphere 411 and a lower hemisphere 412. Each hemisphere is composed of a plurality of radial blades 413. The radial blades 413 are spaced apart from each other and are permeable, so that the fluid can enter from either end. After being blocked by the radial blades 413, the fluid interacts with the filler 41, so that the liquid and gas in the fluid can be separated. A plurality of the fillers 41 are filled in the filler basket 48, so that the overall structure is formed so that the gas and liquid cannot pass directly and unimpeded from any direction.
[0029] like Figure 1 and Figure 4 As shown, the body of the gas-liquid separator cylinder 42 forms a gas-liquid inlet 43, and its position corresponds to the bottom of the packing basket 48. The gas-liquid inlet 43 is connected to the gas-liquid outlet of the upper device through a gas-liquid pipeline 451. In addition, a liquid outlet 47 is formed on the body of the gas-liquid separator cylinder 42 and outputs liquid through a liquid circulation pipeline 49. The position of the liquid outlet 47 is lower than the position of the gas-liquid inlet 43.
[0030] The present invention can also form two mounting holes 422 on the body of the gas-liquid separator cylinder 42 for mounting a liquid level meter (not shown), so that the liquid height in the gas-liquid separator cylinder 42 can be clearly known.
[0031] like Figure 7 As shown, during operation, the fluid from the fluid output device 60 can enter the gas-liquid separator cylinder 42 through the gas-liquid inlet 43 of the gas-liquid separator cylinder 42, wherein the liquid with larger particles in the fluid directly drips to the bottom of the gas-liquid separator cylinder 42, while the gas containing the liquid with tiny particles naturally floats upward and passes through the packing basket 48. When the gas containing the liquid with tiny particles contacts the packing basket 48, the liquid with tiny particles is dispersed by the packing 41 in the packing basket 48 and re-condenses and converges into liquid on the surface of the packing 41, and then drips to the bottom of the gas-liquid separator cylinder 42 and flows out from the liquid outlet 47 below, while the gas containing almost no liquid floats upward and is discharged from the exhaust port 45.
[0032] Figure 5 The first application example of the gas-liquid separator 40 of the present invention is shown, wherein the gas-liquid separator 40 is directly connected to an output end 82 of a condenser 80 through the gas-liquid pipeline 451, and the gas-liquid separator 40 separates the fluid output by the condenser 80 into air and liquid water, and then outputs the air and liquid water.
[0033] Figure 4 and Figure 6The second application example of the gas-liquid separator 40 of the present invention is shown, wherein the gas-liquid separator 40 is used in a vacuum system having a liquid ring pump 10. In addition to the gas-liquid separator 40, the vacuum system further includes the following components: A liquid ring pump 10, the liquid ring pump 10 includes two inlets, namely an inlet 12 and an inlet 14, and an exhaust port 16. The inlet 12 of the liquid ring pump 10 is connected to an air intake pipeline 11. The liquid ring pump 10 can be a water ring vacuum pump (such as a large water ring vacuum pump currently used in power plants, or a small water ring vacuum pump in other energy-saving vacuum units), or a non-water ring fore-stage vacuum pump that can be directly discharged into the atmosphere. The vacuum system with the liquid ring pump 10 is characterized in that the pressure of the inlet 12 of the liquid ring pump 10 reaches 10,000 Pa; A Roots vacuum pump assembly 20 includes at least one Roots vacuum pump 22. The at least one Roots vacuum pump 22 of the Roots vacuum pump assembly 20 includes an inlet 24 and an exhaust port 26. The inlet 24 of the first Roots vacuum pump 22 is connected to the rear end of a vacuum main pipe of the previous system (not shown). The vacuum system is a vacuum system in any form in which the liquid ring pump 10 is configured.
[0034] like Figure 4 As shown, when the Roots vacuum pump assembly 20 includes only one Roots vacuum pump 22 , the exhaust port 26 of the Roots vacuum pump 22 is connected to the inlet 12 of the liquid ring pump 10 through the intake pipe 11 .
[0035] like Figure 6 As shown, when the Roots vacuum pump group 20 is formed by connecting a plurality of Roots vacuum pumps 22 in series, the exhaust port 26 of the front-stage Roots vacuum pump 22 is connected to the inlet 24 of the rear-stage Roots vacuum pump 22 through a delivery pipeline 13, and the Roots vacuum pump group 20 is formed in series one by one. The application of a plurality of Roots vacuum pumps 22 in series can share the pressure difference that each stage of the Roots vacuum pump 22 needs to bear, thereby sharing the heat generated in the process of compressing air, so that each Roots vacuum pump 22 will not be stuck due to overheating, but can operate stably.
[0036] At least one exhaust cooler or heat exchanger 30 is connected in series between the delivery pipeline 13 of the last stage of the Roots vacuum pump group 20 and the air inlet pipeline 11 connected to the liquid ring pump 10 to prevent the compressed gas of the previous stage vacuum pump from generating too high a temperature and affecting the safe operation of the next stage vacuum pump.
[0037] The gas-liquid inlet 43 of the gas-liquid separator 40 is connected to the exhaust port 16 of the liquid ring pump 10 through the gas-liquid pipeline 451 , and the liquid outlet 47 formed on the body of the gas-liquid separator cylinder 42 is connected to the inlet 14 of the liquid ring pump 10 through the liquid circulation pipeline 49 .
[0038] Therefore, the fluid from the liquid ring pump 10 (the fluid extracted from the vacuum system) can enter the gas-liquid separator cylinder 42 through the gas-liquid inlet 43 of the gas-liquid separator cylinder 42, wherein the liquid with larger particles in the fluid directly drips to the bottom of the gas-liquid separator cylinder 42, while the gas containing the liquid with tiny particles naturally floats upward and passes through the packing basket 48. When the gas containing the liquid with tiny particles contacts the packing basket 48, the tiny particle liquid is broken up by the packing 41 in the packing basket 48 and re-condenses and converges into liquid on the surface of the packing 41, then drips to the bottom of the gas-liquid separator cylinder 42 and flows out from the liquid outlet 47 below, and then enters the circulation of the working liquid of the liquid ring pump 10 through the liquid circulation pipeline 49 to supplement the loss of the working liquid when the liquid ring pump 10 is working. The gas that contains almost no liquid floats upward and is discharged from the exhaust port 45. As shown in FIG. Figure 5 A cooler 55 can be installed on the liquid loop pipeline 49 to cool the liquid.
[0039] The system having the liquid ring pump 10 in the present invention may be single-stage or multi-stage, simple or complex, but the main content is that it contains the liquid ring pump 10.
[0040] The advantage of the present invention is that the gas-liquid separator 40 has a special design structure of a specific packing basket 48 and a packing 41 capable of separating gas and liquid. In some occasions where the inlet pressure of the liquid ring pump 10 is high, the packing basket 48 and the packing 41 can be used to achieve complete separation of the gas phase and the liquid phase. Therefore, the consumption of the working liquid is reduced, and the pollution caused by the discharge of the liquid is also reduced. The present invention can be used in various vacuum systems, and the fluid extracted by the system passes through the gas-liquid separator 40 of the present invention, and the working fluid of the liquid ring pump 10 is supplemented after the liquid is separated, making the overall system more efficient.
[0041] The above detailed description is a specific description of a feasible embodiment of the present invention. The embodiment is not intended to limit the patent scope of the present invention. Any equivalent implementation or modification that does not deviate from the technical spirit of the present invention should be included in the patent scope of the present invention.
Claims
1. A gas-liquid separator, It is characterized in that include: a gas-liquid separator cylinder; A gas-liquid separator top cover, used to seal the upper opening of the gas-liquid separator cylinder, wherein the gas-liquid separator top cover has a coverable opening serving as an exhaust port of the gas-liquid separator cylinder; A filler basket is a basket inside the gas-liquid separator cylinder, which contains at least one filler; the filler is a filler that can separate gas and liquid; The body of the gas-liquid separator cylinder forms a gas-liquid inlet, and its position corresponds to the bottom of the packing basket; the gas-liquid inlet is connected to the gas-liquid outlet of the fluid output device through a gas-liquid pipeline, and the body of the gas-liquid separator cylinder forms a liquid outlet and outputs liquid through a liquid circulation pipeline; wherein the position of the liquid outlet is lower than the position of the gas-liquid inlet; During operation, the fluid from the fluid output device enters the gas-liquid separator cylinder through the gas-liquid inlet of the gas-liquid separator cylinder, wherein the liquid with large particles in the fluid directly drips to the bottom of the gas-liquid separator cylinder, while the gas containing small particle liquid naturally floats upward and passes through the packing basket; the small particle liquid is broken up by the packing in the packing basket and re-condenses on the surface of the packing to merge into liquid, and then drips to the bottom of the gas-liquid separator cylinder and flows out from the liquid outlet below, while the gas without liquid floats upward and is discharged from the exhaust port of the gas-liquid separator cylinder.
2. The gas-liquid separator according to claim 1, It is characterized in that It also includes a partition plate, which is located at the upper opening of the gas-liquid separator cylinder. The partition plate does not contact the inner wall surface of the gas-liquid separator cylinder. The filling basket is placed above the partition plate.
3. The gas-liquid separator according to claim 1, It is characterized in that The fluid is any form of fluid medium, including gas, saturated steam, and unsaturated steam.
4. The gas-liquid separator according to claim 1, It is characterized in that The material of the filler is polypropylene plastic.
5. The gas-liquid separator according to claim 1, It is characterized in that The packing basket and the packing form a structure that prevents fluid from passing directly and unhindered from any direction.
6. The gas-liquid separator according to claim 1, It is characterized in that The filler is a spherical multi-faceted hollow filler ball; the appearance of the multi-faceted hollow filler ball is spherical, and it is divided into an upper hemisphere and a lower hemisphere, and each hemisphere is composed of a plurality of radial blades; and the radial blades are spaced apart from each other and are hollow, so that the fluid can enter from either end, and after passing through the obstruction of the radial blades, the fluid acts on the filler, so that the liquid and gas in the fluid can be separated.
7. The gas-liquid separator according to claim 1, It is characterized in that The cylinder body of the gas-liquid separator cylinder forms a mounting hole for mounting a liquid level meter.
8. The gas-liquid separator according to claim 1, It is characterized in that The fluid output device is a condenser, and the gas-liquid separator is connected to an output end of the condenser through the gas-liquid pipeline. The gas-liquid separator separates the fluid output from the condenser into air and liquid water, and then outputs the air and liquid water.
9. A vacuum system using the gas-liquid separator according to claim 1, It is characterized in that The vacuum system includes, in addition to the gas-liquid separator, the following: A liquid ring pump, the liquid ring pump comprising at least one inlet and at least one exhaust port; the inlet of the liquid ring pump is connected to an air intake pipeline; A Roots vacuum pump assembly, comprising at least one Roots vacuum pump, wherein the at least one Roots vacuum pump of the Roots vacuum pump assembly comprises an inlet and an exhaust port, wherein the inlet of the first Roots vacuum pump of the Roots vacuum pump assembly is connected to the rear end of a vacuum main pipe of a previous stage system; and The exhaust port of the last Roots vacuum pump of the Roots vacuum pump group is connected to the inlet of the liquid ring pump through the air inlet pipeline; The gas-liquid inlet of the gas-liquid separator is connected to the exhaust port of the liquid ring pump through the gas-liquid pipeline, and the liquid outlet formed by the cylinder of the gas-liquid separator cylinder is connected to the inlet of the liquid ring pump through the liquid circulation pipeline; and Therefore, the fluid from the liquid ring pump enters the gas-liquid separator cylinder through the gas-liquid inlet of the gas-liquid separator cylinder, wherein the liquid with large particles in the fluid directly drips to the bottom of the gas-liquid separator cylinder, while the gas containing small particle liquid naturally floats upward and passes through the packing basket; the small particle liquid is broken up by the packing in the packing basket and re-condenses on the surface of the packing to merge into liquid, and then drips to the bottom of the gas-liquid separator cylinder and flows out from the liquid outlet below, and then enters the circulation of the working liquid of the liquid ring pump through the liquid circulation pipeline to supplement the loss of working liquid when the liquid ring pump is working; and the gas without liquid floats upward and is discharged from the exhaust port of the gas-liquid separator cylinder.
10. The vacuum system according to claim 9, It is characterized in that The Roots vacuum pump group comprises a plurality of Roots vacuum pumps which are connected in series. The plurality of Roots vacuum pumps connected in series are used to share the pressure difference to be borne, thereby sharing the heat generated in the process of compressing air.
11. The vacuum system according to claim 9, It is characterized in that At least one exhaust port cooler or heat exchanger is connected in series between the exhaust port of the last Roots vacuum pump of the Roots vacuum pump group and the air inlet pipeline connected to the liquid ring pump to prevent the compressed gas of the Roots vacuum pump group from generating too high a temperature and affecting the safe operation of the liquid ring pump.
12. The vacuum system according to claim 9, It is characterized in that The liquid ring pump is selected from a water ring vacuum pump, a large water ring vacuum pump, or a fore-stage vacuum pump of other forms other than a water ring that can be directly discharged into the atmosphere; A cooler is installed on the liquid circulation pipeline to cool the liquid; and The inlet pressure of the liquid ring pump reaches 10,000 Pa.