Negative pressure separator with drainage function

Abstract

The invention relates to a negative pressure separator with a drainage function. The device comprises a vapor-liquid separator, a low-level liquid level meter, a high-level liquid level meter, a small water pump, a large water pump, a small one-way valve, a large one-way valve and a liquid storage and drainage tank. The vapor-liquid separator is divided into a filtering tank body and a liquid storage tank body which are both closed spaces, a medium inlet is formed in the side wall, close to the bottom, of the filtering tank body, a medium outlet is formed in the top of the filtering tank body, and filiform filtering substances are arranged in the filtering tank body. The combination portion of the lower portion of the filtering tank body and the liquid storage tank body is provided with a liquid drainage through hole, the right side of the liquid storage tank body is provided with a high-level liquid level meter and a low-level liquid level meter, and the bottom of the liquid storage tank body is provided with a large liquid drainage hole and a small liquid drainage hole which are connected to inlets of a small water pump and a large water pump through liquid communicating pipes. A large liquid inlet and a small liquid inlet are formed in the side wall, close to the bottom, of the liquid storage and drainage tank, a liquid outlet is formed in the side wall, close to the top, of the liquid storage and drainage tank, outlets of the large and small water pumps are connected with the large and small liquid inlets of the liquid storage and drainage tank through liquid communicating pipes, and large and small one-way valves are installed in the pipelines. By arranging the large water pump, the small water pump, the liquid communicating pipe, the large one-way valve, the small one-way valve and the liquid storage and drainage tank, the air pressure of the vapor-liquid separator is changed, the large water pump and the small water pump are controlled to be started and stopped through the high-level liquid level meter and the low-level liquid level meter respectively, and liquid in a liquid storage tank body of the vapor-liquid separator is pumped into the liquid storage and drainage tank; and the liquid is automatically discharged through the liquid outlet of the liquid storage and discharge box, thereby being safer and more reliable.

Description

Technical Field

[0001] The invention relates to the technical field of gas-liquid separation, and in particular to a negative pressure separator with a liquid discharge function. Background Art

[0002] At present, as a relatively clean fuel, natural gas is increasingly used. In the process of natural gas extraction and liquefaction, in order to reduce the moisture content, the raw gas collected from the gas well needs to be processed by a specific device to separate the raw gas from the gas and liquid to meet the requirements of the subsequent process. In the raw gas extraction unit in the industry, the raw gas is mainly separated from the raw gas buffer tank for gas and liquid, but considering that the extraction unit is operated under negative pressure, there is a phenomenon that the liquid separated from the raw gas buffer tank cannot be discharged.

[0003] Gas sampling and testing are required in living and working environments. The detection instruments have high requirements for gas humidity. Therefore, the sampled gas must control the water vapor content in the gas. The commonly used one is the refrigerated dehumidification and drying system. When the refrigerated dehumidification and drying system is in operation, it is more sensitive to the ambient temperature. Generally, it cannot operate effectively when it exceeds 38°C and is lower than 0°C. The refrigerated dehumidification and drying system uses refrigeration technology, so the refrigerant evaporation temperature is not allowed to be lower than 2°C, otherwise it will freeze and block the pipeline, resulting in the sampled gas being unable to pass through the gas supply. The dew point can only reach about 3°C ​​(pressure dew point), and it is greatly affected by the inlet temperature of the sampled gas. For every 5°C increase in the inlet temperature of the sampled gas, the refrigeration efficiency will decrease by 30%. The dew point of the sampled gas after drying will increase significantly, which is greatly affected by the ambient temperature. The refrigerated dehumidification and drying system also has the phenomenon of high-humidity gas cold precipitation and aggregation in the incoming pipeline, forming a large water flow to impact the refrigerated dehumidification and drying system and the detection instrument, causing failure. Summary of the invention

[0004] The purpose of the present invention is to provide a negative pressure separator with a liquid discharge function. By setting a small water pump, a large water pump, a small one-way valve, a large one-way valve and a liquid storage and discharge box, the gas pressure of the gas-liquid separator is changed and the liquid is automatically discharged through the liquid discharge port of the liquid storage and discharge box, which is safer and more reliable.

[0005] The above-mentioned object of the present invention is achieved through the following technical solutions: A negative pressure separator with a liquid discharge function comprises a gas-liquid separator, a low-level liquid gauge, a high-level liquid gauge, a small water pump, a large water pump, a small one-way valve, a large one-way valve, and a liquid storage and discharge tank.

[0006] The gas-liquid separator is divided into a filter tank body and a liquid storage tank body, both of which are closed spaces. A medium inlet is arranged on the side wall of the filter tank body near the bottom, a medium outlet is arranged on the top of the filter tank body, and filamentous filter material is contained in the filter tank body. A drainage hole is opened at the joint part between the lower part of the filter tank body and the liquid storage tank body, a high-level liquid level gauge and a low-level liquid level gauge are installed on the right side of the liquid storage tank body, and a small drainage hole and a large drainage hole are opened at the bottom of the liquid storage tank body.

[0007] A small liquid inlet and a large liquid inlet are arranged on the side wall of the liquid storage and drainage box near the bottom, and a liquid discharge port is arranged on the side wall of the liquid storage and drainage box near the top.

[0008] Preferably, the gas enters the filter tank body of the gas-water separator through the medium inlet, and the filter tank body is filled with filamentary filter material. The gas flows out from the medium outlet at the top of the filter tank body after being filtered by the filamentary filter material, and the liquid produced by the filtration flows into the liquid storage tank body of the gas-liquid separator through the drainage hole at the lower part of the tank body.

[0009] Preferably, a low-level liquid gauge and a high-level liquid gauge are installed on the right side of the liquid storage tank of the gas-liquid separator, and the start and stop of the small water pump are controlled by the low-level liquid gauge, and the start and stop of the large water pump are controlled by the high-level liquid gauge.

[0010] Preferably, the small water pump is connected to the small liquid inlet of the storage and drainage liquid tank through a liquid connecting pipe, and a small one-way valve is installed in the pipe. The large water pump is connected to the large liquid inlet of the storage and drainage liquid tank through a liquid connecting pipe, and a large one-way valve is installed in the pipe. The large and small one-way valves can prevent the liquid from the storage and drainage liquid tank from backflowing into the water pump.

[0011] Preferably, the side wall of the storage and drainage liquid box near the bottom is provided with two large and small liquid inlets, and the side wall of the storage and drainage liquid box near the top is provided with a liquid discharge port. The discharge position is higher than the liquid inlet, and the liquid level in the storage and drainage liquid box is higher than the position of the liquid discharge port, and can overflow and discharge automatically. At the same time, the liquid in the storage and drainage liquid box can form a seal for the large and small water pumps to prevent air from entering.

[0012] In summary, the beneficial technical effects of the present invention are: A negative pressure separator with a drainage function includes: a vapor-liquid separator, a low-level liquid level gauge, a high-level liquid level gauge, a small water pump, a large water pump, a small one-way valve, a large one-way valve, and a liquid storage tank. The vapor-liquid separator is divided into a filter tank body and a liquid storage tank body, both of which are closed spaces. A medium inlet is arranged on the side wall of the filter tank body near the bottom, a medium outlet is arranged on the top of the filter tank body, and filamentous filter material is contained in the filter tank body. A drainage through hole is opened at the joint part between the lower part of the filter tank body and the liquid storage tank body, a high-level liquid level gauge and a low-level liquid level gauge are installed on the right side of the liquid storage tank body, two large and small drainage holes are opened at the bottom of the liquid storage tank body, and the large and small drainage holes are connected to the inlet of the small water pump and the large water pump through a liquid connecting pipe, two large and small liquid inlets are arranged on the side wall of the liquid storage tank near the bottom, and a drainage port is arranged on the side wall of the liquid storage tank near the top, and the large and small water pump outlets are connected to the large and small liquid inlets of the liquid storage tank through a liquid connecting pipe, and large and small one-way valves are installed in this pipeline. The present invention changes the air pressure of the gas-liquid separator by arranging large and small water pumps, large and small one-way valves, and a storage and drainage liquid tank. The high-level liquid gauge and the low-level liquid gauge are used to control the start and stop of the large water pump and the small water pump respectively, so that the liquid in the liquid storage tank of the gas-liquid separator is pumped to the storage and drainage liquid tank, and the liquid is automatically discharged through the drainage port of the storage and drainage liquid tank, which is safer and more reliable.

[0013] In order to make the above and other purposes, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are specifically cited below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0015] Figure 1 It is a schematic diagram of the structure of a negative pressure separator with a liquid discharge function implemented in the present invention.

[0017] The figure markings of the above drawings are: 1, medium inlet; 2, medium outlet; 3, gas-liquid separator; 3-1, filter tank body; 3-2, liquid storage tank body; 3-3, drainage hole; 3-4, small drainage hole; 3-5, large drainage hole; 4, low-level liquid level gauge; 5, high-level liquid level gauge; 6, small water pump; 7, large water pump; 8, small one-way valve; 9, large one-way valve; 10 storage and drainage box, 10-1, drainage port; 10-2, small liquid inlet; 10-3, large liquid inlet. Implementation

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] Example: See Figure 1 As shown, a negative pressure separator with a liquid discharge function comprises a gas-liquid separator 3, a low-level liquid gauge 4, a high-level liquid gauge 5, a small water pump 6, a large water pump 7, a small one-way valve 8, a large one-way valve 9, and a liquid storage and discharge tank 10.

[0020] The gas-liquid separator 3 is divided into a filter tank body 3-1 and a liquid storage tank body 3-2, both of which are closed spaces. A medium inlet 1 is provided on the side wall of the filter tank body 3-1 near the bottom, and the medium used for gas-liquid separation can be fed into the upper filter tank body 3-1 from the medium inlet 1. A medium outlet 2 is provided on the top of the filter tank body. There is a filamentary filter material in the filter tank body 3-1. After the separated gas is filtered by the filamentary filter material in the filter tank body 3-1, it can be discharged from the medium outlet 2 and enter the subsequent processing process. A drainage hole 3-3 is opened at the joint part of the lower part of the filter tank body 3-1 and the liquid storage tank body 3-2, and the filtered liquid flows into the liquid storage tank body 3-2 from the drainage hole 3-3 at the lower part of the filter tank body 3-1. A low level gauge 4 and a high level gauge 5 are installed on the right side of the liquid storage tank body 3-2. The low level gauge 4 is used to connect and control the start and stop of the small water pump 6; the high level gauge 5 is used to connect and control the start and stop of the small water pump 7; a small drainage hole 3-4 and a large drainage hole 3-5 are opened at the bottom of the liquid storage tank body.

[0021] The inlet of the small water pump 6 is connected to the small drainage hole 3-4 through a liquid connecting pipe, and the outlet of the small water pump 6 is connected to the small liquid inlet 10-2 of the storage and drainage tank 10 through a liquid connecting pipe. A small one-way valve 8 is installed in this pipeline to prevent the liquid in the storage and drainage tank 10 from backflowing into the small water pump 6. The inlet of the large water pump 7 is connected to the large drainage hole 3-5 through a liquid connecting pipe, and the outlet of the large water pump 7 is connected to the large liquid inlet 10-3 of the storage and drainage tank 10 through a liquid connecting pipe. A large one-way valve 9 is installed in this pipeline to prevent the liquid in the storage and drainage tank 10 from flowing back into the large water pump 7. The side wall of the liquid storage and drainage box 10 near the bottom is provided with a small liquid inlet 10-2 and a large liquid inlet 10-3, and the side wall of the liquid storage and drainage box 10 near the top is provided with a liquid discharge port 10-1.

[0022] The implementation principle of the above embodiment is: in the working state, when the liquid level height in the liquid storage tank body 3-2 of the vapor-liquid separator 3 is higher than the upper limit set by the high-level liquid gauge 5, the large water pump 7 is turned on, and the liquid is pumped from the large discharge hole 3-5 of the vapor-liquid separator 3 to flow through the large one-way valve 9 and then into the storage and discharge tank 10 through the large liquid inlet 10-3; when the liquid level height in the liquid storage tank body 3-2 of the vapor-liquid separator 3 is lower than the lower limit set by the high-level liquid gauge 5, the large water pump 7 stops. When the liquid level in the liquid storage tank 3-2 of the gas-liquid separator 3 is lower than the lower limit set by the high-level liquid gauge 5 and higher than the upper limit set by the low-level liquid gauge 4, the small water pump 6 is turned on, and the liquid is pumped from the small drainage hole 3-4 of the gas-liquid separator 3 to flow through the small one-way valve 8 and then into the storage and drainage tank 10 through the small liquid inlet 10-2; when the liquid level in the liquid storage tank 3-2 of the gas-liquid separator 3 is lower than the lower limit set by the low-level liquid gauge 4, the small water pump 6 stops. When the large water pump 7 and the small water pump 6 are turned on, the filter tank 3-1 and the liquid storage tank 3-2 of the gas-liquid separator 3 are both under negative pressure. Then, the gas-liquid separation medium is introduced into the filter tank 3-1 through the medium inlet 1 for gas-liquid separation, and the separated gas enters the next processing step through the medium outlet 2. The separated liquid flows into the liquid storage tank 3-2 through the drainage hole 3-3 at the lower part of the filter tank 3-1 of the gas-liquid separator 3. As the separated liquid accumulates in the liquid storage tank body 3-2 of the gas-liquid separator 3, the liquid level gradually rises. When the set liquid level is reached, the low-level liquid level gauge 4 controls the start and stop of the small water pump 6, and the high-level liquid level gauge 5 controls the start and stop of the large water pump 7; the liquid pumped by the small water pump 6 and the large water pump 7 flows into the storage and drainage liquid tank 10 through the small liquid inlet 10-2 and the large liquid inlet 10-3 of the storage and drainage liquid tank 10. As the liquid in the storage and drainage liquid tank 10 accumulates, it gradually rises. When the liquid level height of the drainage port 10-1 of the storage and drainage liquid tank 10 is reached, the liquid is automatically discharged through the drainage port 10-1, and this cycle is repeated.

[0023] Obviously, the above embodiments are merely examples for clearly explaining the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. However, these obvious changes or modifications derived from the spirit of the present invention are still within the scope of protection of the present invention.

Claims

1. A negative pressure separator with drainage function. It includes a gas-liquid separator, a low-level liquid level gauge, a high-level liquid level gauge, a small water pump, a large water pump, a small one-way valve, a large one-way valve, and a liquid storage and drainage tank; The gas-liquid separator includes a filter tank body and a liquid storage tank body, both of which are closed spaces. A medium inlet is arranged on the side wall of the filter tank body near the bottom, a medium outlet is arranged on the top of the filter tank body, and filamentous filter material is arranged in the filter tank body. A drainage through hole is opened at the joint part between the lower part of the filter tank body and the liquid storage tank body, and a small drainage hole and a large drainage hole are opened at the bottom of the liquid storage tank body.

2. A small liquid inlet and a large liquid inlet are arranged on the side wall of the liquid storage and drainage box near the bottom, and a liquid discharge port is arranged on the side wall of the liquid storage and drainage box near the top.

3. A negative pressure separator with drainage function as claimed in claim 1, characterized in that: The gas enters the filter tank body of the gas-water separator through the medium inlet, and the filter tank body is filled with filamentary filter material. The gas flows out from the medium outlet at the top of the filter tank body after being filtered by the filamentary filter material, and the liquid produced by the filtration flows into the liquid storage tank body of the gas-liquid separator through the drainage hole at the bottom of the tank body.

4. A negative pressure separator with drainage function as claimed in claim 1, characterized in that: A low-level liquid gauge and a high-level liquid gauge are installed on the right side of the liquid storage tank of the gas-liquid separator. The start and stop of the small water pump are controlled by the low-level liquid gauge, and the start and stop of the large water pump are controlled by the high-level liquid gauge.

5. A negative pressure separator with drainage function as claimed in claim 1, characterized in that: The small water pump is connected to the small liquid inlet of the storage and drainage liquid tank through a liquid connecting pipe, and a small one-way valve is installed in the pipe. The large water pump is connected to the large liquid inlet of the storage and drainage liquid tank through a liquid connecting pipe, and a large one-way valve is installed in the pipe. The large and small one-way valves can prevent the liquid from the storage and drainage liquid tank from backflowing into the water pump.

6. A negative pressure separator with drainage function as claimed in claim 1, characterized in that: The side wall of the storage and drainage liquid box near the bottom is provided with two large and small liquid inlets, and the side wall of the storage and drainage liquid box near the top is provided with a liquid discharge port. The discharge position is higher than the liquid inlet, and the liquid level in the storage and drainage liquid box is higher than the position of the liquid discharge port, and can overflow and discharge automatically. At the same time, the liquid in the storage and drainage liquid box can form a seal for the large and small water pumps to prevent air from entering.

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