CN112483884B - Liquid gas storage device for improving inflation purity of SF6 gas station - Google Patents

Liquid gas storage device for improving inflation purity of SF6 gas station Download PDF

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Publication number
CN112483884B
CN112483884B CN202011516945.0A CN202011516945A CN112483884B CN 112483884 B CN112483884 B CN 112483884B CN 202011516945 A CN202011516945 A CN 202011516945A CN 112483884 B CN112483884 B CN 112483884B
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liquid
gas
pipeline
tank
freezing room
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CN112483884A (en
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李建清
孙梁益
李蕴文
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Nantong Hongdeng Mechanical Equipment Co ltd
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Nantong Hongdeng Mechanical Equipment Co ltd
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C5/00—Methods or apparatus for filling containers with liquefied, solidified, or compressed gases under pressures
    • F17C5/02—Methods or apparatus for filling containers with liquefied, solidified, or compressed gases under pressures for filling with liquefied gases
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C13/00—Details of vessels or of the filling or discharging of vessels
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C13/00—Details of vessels or of the filling or discharging of vessels
    • F17C13/02—Special adaptations of indicating, measuring, or monitoring equipment
    • F17C13/023—Special adaptations of indicating, measuring, or monitoring equipment having the mass as the parameter
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C13/00—Details of vessels or of the filling or discharging of vessels
    • F17C13/02—Special adaptations of indicating, measuring, or monitoring equipment
    • F17C13/025—Special adaptations of indicating, measuring, or monitoring equipment having the pressure as the parameter
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C13/00—Details of vessels or of the filling or discharging of vessels
    • F17C13/04—Arrangement or mounting of valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C13/00—Details of vessels or of the filling or discharging of vessels
    • F17C13/12—Arrangements or mounting of devices for preventing or minimising the effect of explosion ; Other safety measures
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C7/00—Methods or apparatus for discharging liquefied, solidified, or compressed gases from pressure vessels, not covered by another subclass
    • F17C7/02—Discharging liquefied gases
    • F17C7/04—Discharging liquefied gases with change of state, e.g. vaporisation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17D—PIPE-LINE SYSTEMS; PIPE-LINES
    • F17D1/00—Pipe-line systems
    • F17D1/02—Pipe-line systems for gases or vapours
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17D—PIPE-LINE SYSTEMS; PIPE-LINES
    • F17D3/00—Arrangements for supervising or controlling working operations
    • F17D3/10—Arrangements for supervising or controlling working operations for taking out the product in the line
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17D—PIPE-LINE SYSTEMS; PIPE-LINES
    • F17D3/00—Arrangements for supervising or controlling working operations
    • F17D3/14—Arrangements for supervising or controlling working operations for eliminating water
    • F17D3/145—Arrangements for supervising or controlling working operations for eliminating water in gas pipelines
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2205/00—Vessel construction, in particular mounting arrangements, attachments or identifications means
    • F17C2205/03—Fluid connections, filters, valves, closure means or other attachments
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2221/00—Handled fluid, in particular type of fluid
    • F17C2221/03—Mixtures
    • F17C2221/037—Containing pollutant, e.g. H2S, Cl
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2227/00—Transfer of fluids, i.e. method or means for transferring the fluid; Heat exchange with the fluid
    • F17C2227/03—Heat exchange with the fluid
    • F17C2227/0337—Heat exchange with the fluid by cooling
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2227/00—Transfer of fluids, i.e. method or means for transferring the fluid; Heat exchange with the fluid
    • F17C2227/03—Heat exchange with the fluid
    • F17C2227/0367—Localisation of heat exchange
    • F17C2227/0369—Localisation of heat exchange in or on a vessel
    • F17C2227/0376—Localisation of heat exchange in or on a vessel in wall contact
    • F17C2227/0383—Localisation of heat exchange in or on a vessel in wall contact outside the vessel
    • F17C2227/0386—Localisation of heat exchange in or on a vessel in wall contact outside the vessel with a jacket
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2227/00—Transfer of fluids, i.e. method or means for transferring the fluid; Heat exchange with the fluid
    • F17C2227/04—Methods for emptying or filling
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2250/00—Accessories; Control means; Indicating, measuring or monitoring of parameters
    • F17C2250/04—Indicating or measuring of parameters as input values
    • F17C2250/0404—Parameters indicated or measured
    • F17C2250/0421—Mass or weight of the content of the vessel
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2250/00—Accessories; Control means; Indicating, measuring or monitoring of parameters
    • F17C2250/04—Indicating or measuring of parameters as input values
    • F17C2250/0404—Parameters indicated or measured
    • F17C2250/043—Pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2260/00—Purposes of gas storage and gas handling
    • F17C2260/04—Reducing risks and environmental impact
    • F17C2260/046—Enhancing energy recovery
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2265/00—Effects achieved by gas storage or gas handling
    • F17C2265/01—Purifying the fluid
    • F17C2265/015—Purifying the fluid by separating

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)

Abstract

The invention relates to a liquid gas storage device for improving the inflation purity of an SF6 gas station, which comprises a freezing room (1), a separation tank (8), liquid tanks (10), weighing devices (12) and evaporators (13), wherein the separation tank (8) and at least one liquid tank (10) are arranged in the freezing room (1), electromagnetic valves (9) are arranged on pipelines between the separation tank (8) and all the liquid tanks (10), a control panel is positioned outside the freezing room (1), and the weighing device (12) is arranged at the bottom of each liquid tank (10). The invention has the advantages that: the problem that the purity of the gas is poor in the process of recycling SF6 is solved, and SF6 gas can be used uninterruptedly; the manpower, material resources and financial resources are saved, the gas utilization efficiency of the user is greatly improved, and the greater production cost is saved; the structure is simple, the implementation is easy, the installation and the operation are easy, the cost is lower, and the requirement on the manufacturing technology is not high.

Description

Liquid gas storage device for improving inflation purity of SF6 gas station
Technical Field
The invention relates to a liquid gas storage device for improving the gas charging purity of an SF6 gas station, and relates to the technical field of fluid.
Background
For high-voltage electrical equipment manufacturers using SF6 as the insulating medium and the arc extinguishing medium, the amount of SF6 gas is large, so that it is not economical to charge the electrical equipment by using only a SF6 steel cylinder, and 50kg of SF6 liquid gas can be contained in only a 40L steel cylinder. The use of gas in this way has the following disadvantages:
1. the large electric appliance is charged with hundreds of to thousands of kg of SF6 once, the workload of bottle changing is very large, and the large electric appliance is not only uneconomical, but also unscientific, time-consuming and labor-consuming. And after the factory finishes the test of the charged electric products, the charged gas needs to be recovered and stored again to wait for the reuse of a second product. Normally, an electrical appliance manufacturer establishes an SF6 gas storage station, generally called as an SF6 centralized gas supply station, SF6 in an electrical appliance product is recovered and stored through an SF6 recovery machine, a second batch of products are inflated through equipment, and the SF6 centralized gas supply station plays a role in recovering, storing and refilling.
2. The high-voltage electric appliance has relatively high requirement on the purity of SF6 gas, and cannot contain excessive moisture and air, in the production process, because the electric appliance needs to be vacuumized before inflation, but the vacuum cannot be vacuumized absolutely, and the moisture cannot be completely pumped out, after the first inflation test, the recovered gas always carries the air and the moisture together to be recovered into a storage tank of the gas, and the air and the moisture also enter the test product during the second inflation test. Thus, after the gas is repeatedly recycled for a certain number of times, the gas can not meet the use requirement.
3. In the prior art, SF6 is liquefied by refrigerating SF6 gas through a purification device of the SF6 gas, so that air and water mixed in the SF6 gas are separated, and the air floats at the uppermost end of a liquid storage tank. The water floats on the upper end of the liquid level of SF6, SF6 is frozen into ice (solidified state) through a deep cooling machine, and then the mixed gas of SF6 floating on the upper end and air is exhausted through vacuum through a vacuum-pumping method. However, the water is also frozen and only a very small part of the water vapor is discharged. Such a treatment apparatus is expensive, has a long treatment time, requires a large amount of energy and manpower for the treatment, and the discharged mixed gas contains SF6 in a high proportion, which affects the environment. When the product needs to be inflated, the solidified SF6 needs to be heated and liquefied, the operation is complicated, the requirement on personnel is high, and certain potential safety hazards exist.
4. Manufacturers often need to purify the gas in the SF6 storage tank, and the gas cannot be used during the purification treatment, which affects the production. Especially, the purification workload of users with large gas consumption is large, the time is long, and the production period is delayed.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides a liquid gas storage device for improving the gas charging purity of an SF6 gas station, and the technical scheme of the invention is as follows:
a liquid gas storage device for improving the inflation purity of an SF6 gas station comprises a freezing room (1), a separating tank (8), liquid tanks (10), weighing devices (12) and evaporators (13), wherein the separating tank (8) and at least one liquid tank (10) are arranged inside the freezing room (1), electromagnetic valves (9) are arranged on pipelines between the separating tank (8) and all the liquid tanks (10), a control panel is positioned outside the freezing room (1), the weighing devices (12) are arranged at the bottom of each liquid tank (10), the evaporators (13) are positioned outside the freezing room (1), an inflation pipeline (15) is arranged at the air outlet of the evaporators (13), one end of the inflation pipeline is arranged at the air inlet of the evaporators (13), the other end of the inflation pipeline extends to the inside of the freezing room (1) and is communicated with a liquid taking main pipe (11), and the liquid taking main pipe (11) forms a plurality of liquid taking branch pipes (111), each liquid branch pipe of getting corresponds a liquid jar (10) knockout drum (8) on install waste gas output mechanism, each liquid jar (10) install pressure vessel pressure safety protection mechanism liquid jar (10) on still install and extend to the outside recovery pipeline (14) in freezer, solenoid valve (9), weighing device (12), evaporimeter (13), pressure vessel pressure safety protection mechanism and waste gas output mechanism all insert control panel.
An air cooler (3) is arranged in the freezing room (1), and the air cooler (3) blows cold air to enter the freezing room, so that the temperature in the freezing room is reduced; and a refrigerating machine (2) for refrigerating the air cooler is arranged outside the freezing room (1), and the refrigerating machine (2) is connected to the control panel.
Waste gas output mechanism include waste gas output pipeline, this waste gas output pipeline's one end with knockout drum (8) intercommunication, the other end extends to the outside formation exhaust outlet (7) of freezing room (1), install knockout drum relief valve (4), knockout drum manometer (5) and waste gas ball valve (6) on this waste gas pipeline in proper order.
Pressure vessel pressure safety protection mechanism include pipeline, liquid jar ball valve, liquid jar pressure relief valve and liquid jar manometer, install liquid jar ball valve (18), liquid jar pressure relief valve (17) and liquid jar manometer (16) on the pipeline with liquid jar (10) intercommunication in proper order, the one end of this pipeline with liquid jar (10) intercommunication, the other end extends to the outside of freezer room (1), the connection port of this pipeline and liquid jar (10) is located the upper portion of liquid jar liquid level (19).
Each liquid taking branch pipe (111) is arranged in the liquid tank (10) in a bent shape, and the pipe orifice of each liquid taking branch pipe (111) faces downwards.
The distance between the pipe orifice of the liquid taking branch pipe (111) and the bottom of the liquid tank (10) is 40mm-60 mm.
The invention has the advantages that:
1. when the electric product is aerated, the liquid SF6 is vaporized after passing through the evaporator, and then the electric product is aerated, so that the high purity and the very low water content of the aerated SF6 gas are ensured.
2. Install control panel in the outside of freezing room to avoid losing the function or reducing the function because of low temperature, the low temperature valve need be selected to the solenoid valve between knockout drum and the liquid jar, the installation is in order to ensure furthest's reservation SF6 gas like this, because of the knockout drum is also in freezing room, the gas that gets into the knockout drum through the cooling also can have a certain amount of liquefied SF6, through opening this solenoid valve of perpendicular installation, under the effect of gravity, SF6 flows into in the liquid gas holder by oneself.
3. The refrigerating room is refrigerated by the refrigerating unit and made of heat-insulating materials, so that the working time of the refrigerating machine is shortened, and the energy consumption is reduced.
4. The power of the refrigerating machine is selected according to the size of the refrigerating room, and the refrigerating room is determined according to the number and the size of the liquid tank and the separating tank, namely the device has great expansibility and applicability.
5. The recovery and the inflation of SF6 gas are not affected all the time, and the quality of the repeatedly used SF6 gas is effectively guaranteed; meanwhile, all gases do not need to be purified, the efficiency is improved, and the gas cost and the labor cost are reduced. Greatly reducing the influence of the discharged gas on the environment and greatly ensuring the safe use of the gas.
Drawings
Fig. 1 is a schematic view of the main structure of the present invention.
Detailed Description
The invention will be further described with reference to specific embodiments, and the advantages and features of the invention will become apparent as the description proceeds. These examples are illustrative only and do not limit the scope of the present invention in any way. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention, and that such changes and modifications may be made without departing from the spirit and scope of the invention.
Referring to fig. 1, the invention relates to a liquid gas storage device for improving the inflation purity of an SF6 gas station, which comprises a freezing room 1, separation tanks 8, liquid tanks 10, weighers 12 and evaporators 13, wherein a separation tank 8 and at least one liquid tank 10 are installed inside the freezing room 1, electromagnetic valves 9 are installed on the pipelines between the separation tank 8 and all the liquid tanks 10, a control panel is located outside the freezing room 1, the bottom of each liquid tank 10 is provided with a weigher 12, the evaporators 13 are located outside the freezing room 1, an inflation pipeline 15 is installed at the gas outlet of the evaporators 13, one end of the gas outlet pipeline is installed at the gas inlet of the evaporators 13, the other end of the gas outlet pipeline extends to the inside of the freezing room 1 and is communicated with a liquid taking main pipe 11, the liquid taking main pipe 11 forms a plurality of liquid taking branch pipes 111, each liquid taking branch pipe corresponds to one liquid tank 10, a waste gas output mechanism is installed on the separation tank 8, each liquid tank 10 is provided with a pressure container pressure safety protection mechanism, the liquid tank 10 is also provided with a recovery pipeline 14 extending to the outside of the freezing room, and the electromagnetic valve 9, the weighing device 12, the evaporator, the pressure container pressure safety protection mechanism and the waste gas output mechanism are all connected to a control panel.
An air cooler 3 is arranged in the freezing chamber 1, and the air cooler 3 blows cold air to enter the freezing chamber, so that the temperature in the freezing chamber is reduced; and a refrigerator 2 for refrigerating the air cooler is arranged outside the freezing room 1, and the refrigerator 2 is connected to the control panel.
The waste gas output mechanism comprises a waste gas output pipeline, one end of the waste gas output pipeline is communicated with the separating tank 8, the other end of the waste gas output pipeline extends to the outside of the freezing room 1 to form a waste gas outlet 7, and a separating tank safety valve 4, a separating tank pressure gauge 5 and a waste gas ball valve 6 are sequentially arranged on the waste gas pipeline.
The pressure safety protection mechanism of the pressure container comprises a pipeline, a liquid tank ball valve, a liquid tank pressure safety valve and a liquid tank pressure gauge, wherein the liquid tank ball valve 18, the liquid tank pressure safety valve 17 and the liquid tank pressure gauge 16 are sequentially installed on the pipeline communicated with the liquid tank 10, one end of the pipeline is communicated with the liquid tank 10, the other end of the pipeline extends to the outside of the freezing room 1, and a connecting port of the pipeline and the liquid tank 10 is located on the upper portion of a liquid level 19 of the liquid tank.
Each of the liquid-taking branch pipes 111 is disposed in the liquid tank 10 in a curved shape, and a pipe opening of the liquid-taking branch pipe 111 faces downward.
The distance between the pipe orifice of the liquid taking branch pipe 111 and the bottom of the liquid tank 10 is 40mm-60 mm.
The working principle of the invention is as follows: the liquid tank of SF6 is placed in a freezing chamber, the temperature in the freezing chamber is kept between-5 ℃ and-0 ℃, so that recovered SF6 gas enters the liquid tank and is cooled by a low-temperature environment and is rapidly liquefied, the liquid density is increased along with the reduction of the temperature, the moisture and the air contained in the SF6 gas are completely separated and enter a separation tank arranged at the upper part of the liquid tank, the higher the liquid level in the liquid tank is, the more mixed gas enters the separation tank, and the higher the purity of SF6 in the liquid tank is. As long as the SF6 does not fill the liquid tank, air and water exist at the upper end of the liquid level, high-purity SF6 gas below the liquid level of the liquid tank is obtained when the product is inflated, and because the SF6 is in a liquid state at the moment, the mixed gas at the upper end of the liquid level has pressure, the liquid SF6 can smoothly flow out through the liquid taking branch pipe and the liquid taking main pipe. The temperature of the SF6 gas flowing out at the moment is low, the density is high, if the SF6 is directly filled into the product, the temperature is increased due to heat exchange with pipelines and electrical products at the ambient temperature, the pressure is increased after the temperature is increased, and the inflation pressure cannot be accurately controlled, so that the evaporator for the liquid SF6 gas is designed, and the gas is heated and gasified when passing through the evaporator, and is safe and reliable. The temperature of the SF6 gas filled into the product is in exchange balance with the ambient temperature in a short time, and the accurate control of the pressure is ensured.
When recovering SF6 gas, closing the freezing chamber door, opening the refrigerator and the air cooler, cooling the freezing chamber, and keeping the temperature between minus 5 ℃ and 0 ℃; connecting a recovery device for recovering SF6 gas at a recovery pipeline for recovery, enabling the gas to enter a liquid tank, and when the pressure in the liquid tank rises to a certain range (generally about 40 bar), keeping the pressure rising continuously all the time, which indicates that the air content in the liquid tank is high; under the condition, opening the electromagnetic valve to enable the gas containing impurities such as air at the upper part of the liquid tank to enter the separation tank from the electromagnetic valve, and closing the electromagnetic valve when the pressure of the liquid tank and the separation tank reaches 40 bar; in this case, the separation tank is mainly contaminated gas such as air, and contains a very small amount of SF6 gas. If gas pressure in the separation tank does not exceed 30bar, do not need to move out the processing, can place and continue cooling in the separation tank, it is liquefied once more because of the temperature is low to have partial SF6 gas in the separation tank like this, obvious expression is the pressure reduction in the separation tank, when pressure no longer reduces in the separation tank, need pass through waste gas outlet with waste gas and insert waste gas bottler, open the waste gas ball valve, the exhaust gas steel bottle is impressed to the exhaust gas, perhaps irritate the steel bottle with waste gas bottler with waste gas into the steel bottle, pressure is less than 1bar in the separation tank, close the waste gas ball valve after the end, the steel bottle that will irritate waste gas is separated the waste gas and is irritated the bottle meter and later deliver to the gas factory and do further processing.

Claims (5)

1. The utility model provides an improve liquid gas storage device of SF6 gas station purity of aerifing, its characterized in that, including freezing room (1), knockout drum (8), liquid jar (10), weighing device (12) and evaporimeter (13), internally mounted has a knockout drum (8) and an at least liquid jar (10) in this freezing room (1), install solenoid valve (9) on the pipeline between this knockout drum (8) and all liquid jars (10), control panel is located the outside of freezing room (1), weighing device (12) are installed to the bottom of each liquid jar (10), evaporimeter (13) be located the outside of freezing room (1), gas pipeline (15) are installed to the gas outlet department of this evaporimeter (13), gas pipeline's one end is installed in the gas inlet department of evaporimeter (13), the other end extends to the inside of freezing room (1) and is responsible for (11) with getting liquid and is communicated, the liquid taking main pipe (11) forms a plurality of liquid taking branch pipes (111), each liquid taking branch pipe corresponds to one liquid tank (10), a waste gas output mechanism is installed on the separation tank (8), a pressure container pressure safety protection mechanism is installed on each liquid tank (10), a recovery pipeline (14) extending to the outside of the freezing room is further installed on each liquid tank (10), and the electromagnetic valve (9), the weighing device (12), the evaporator (13), the pressure container pressure safety protection mechanism and the waste gas output mechanism are all connected to a control panel;
an air cooler (3) is arranged in the freezing room (1), and the air cooler (3) blows cold air to enter the freezing room, so that the temperature in the freezing room is reduced; and a refrigerating machine (2) for refrigerating the air cooler is arranged outside the freezing room (1), and the refrigerating machine (2) is connected to the control panel.
2. The liquid gas storage device for improving the inflation purity of the SF6 gas station as claimed in claim 1, wherein the exhaust gas output mechanism comprises an exhaust gas output pipeline, one end of the exhaust gas output pipeline is connected to the separation tank (8), the other end of the exhaust gas output pipeline extends to the outside of the freezing chamber (1) to form an exhaust gas outlet (7), and a separation tank safety valve (4), a separation tank pressure gauge (5) and an exhaust gas ball valve (6) are sequentially installed on the exhaust gas output pipeline.
3. The liquid gas storage device for improving the inflation purity of the SF6 gas station as claimed in claim 1, wherein the pressure container pressure safety protection mechanism comprises a pipeline, a liquid tank ball valve, a liquid tank pressure safety valve and a liquid tank pressure gauge, the pipeline connected to the liquid tank (10) is sequentially provided with the liquid tank ball valve (18), the liquid tank pressure safety valve (17) and the liquid tank pressure gauge (16), one end of the pipeline is connected to the liquid tank (10), the other end of the pipeline extends to the outside of the freezer (1), and the connection port of the pipeline and the liquid tank (10) is located at the upper part of the liquid level (19) of the liquid tank.
4. The liquid gas storage device for improving the inflation purity of the SF6 gas station as claimed in claim 1, wherein each of said liquid taking branch pipes (111) is disposed in a curved shape in said liquid tank (10), and the mouth of said liquid taking branch pipe (111) faces downward.
5. The liquid gas storage device for improving the inflation purity of the SF6 gas station as claimed in claim 4, wherein the distance between the nozzle of the liquid taking branch pipe (111) and the bottom of the liquid tank (10) is 40mm-60 mm.
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