Gas configuration system and method

Abstract

The present invention relates to the field of gas configuration technology, and in particular to a gas configuration system and method. The gas configuration system provided by the present invention can reasonably utilize the gas energy in a double-shoulder bottle, specifically comprising at least two double-shoulder bottles, a filled gas cylinder, a weighing device and at least two accumulators, each double-shoulder bottle is connected to the filled gas cylinder through an accumulator, and the medium pressure is used to fill the accumulator to become a liquid medium, and then the accumulator's own capacity is used to discharge the stored liquid medium into the filled gas cylinder, so that the energy of the gas itself is effectively utilized for gas transmission.

Description

Technical Field

[0001] The present invention relates to the technical field of gas configuration, and in particular to a gas configuration system and method. Background Art

[0002] There are many types of liquefied gases. Gases such as ethane, ethylene, propane, propylene, and ammonia commonly used by chemical companies are all liquefied gases at different pressures. For the preparation of mixed gases containing liquefied gases with different gas components, if two conventional gas cylinders are directly connected and filled in an equalizing manner, the filling amounts of liquefied gases of different pressure levels will be different, or the low-pressure medium will not be able to be filled. This is because the vapor pressures of different gases at the same temperature can vary greatly, and the difference can be more than one order of magnitude. If the gas cylinder is first filled with a gas with a higher vapor pressure, and then the equalizing method is used to fill it with a gas with a lower vapor pressure, the filled gas cylinder may not be able to be filled with the gas with the lower vapor pressure. Therefore, it is necessary to provide a gas configuration system and method to solve the above-mentioned technical problems. Summary of the invention

[0003] The present invention provides a gas configuration system and method, which can be used to charge liquefiable gases with different vapor pressures into a gas cylinder.

[0004] In one embodiment, the present invention provides a gas configuration system, comprising at least two double-shoulder bottles, a filled gas cylinder, a weighing device and at least two accumulators, each of the double-shoulder bottles is connected to the filled gas cylinder via an accumulator, the saturated vapor pressure of the liquefied gas stored in each of the double-shoulder bottles is different, the filled gas cylinder is placed on the weighing device, and the state of the medium discharged from each of the double-shoulder bottles is a gas-liquid mixed state;

[0005] When configuring the gas, fill the gas in the order of saturated vapor pressure from low to high;

[0006] When each type of liquefied gas is filled, the medium discharged from the double-shoulder bottle first enters the corresponding accumulator to become a liquid medium and is stored to a preset mass, and then the accumulator is used to discharge the stored liquid medium into the filled gas cylinder. The above operation is repeated until the target mass of liquefied gas is configured in the filled gas cylinder.

[0007] Preferably, the accumulator is a piston accumulator.

[0008] Preferably, the weighing instrument is a balance.

[0009] Preferably, a pressure detection device and a safety valve are provided on the pipeline connecting the accumulator and the filled gas cylinder.

[0010] Preferably, it also includes at least two first one-way valves and at least two second one-way valves, each of the shoulder bottles is connected to the accumulator via one of the first one-way valves, and each of the accumulators is connected to the filled gas cylinder via one of the second one-way valves.

[0011] Preferably, it also includes a vacuum pump, which is used to evacuate the pipeline connecting the shoulder bottle, the filled gas cylinder, the accumulator and the accumulator.

[0012] Preferably, it also includes a switch valve, which is arranged on a pipeline connecting the shoulder bottle, the filled gas cylinder, and the accumulator.

[0013] Preferably, each of the accumulators is provided with a metering device for measuring the mass of the medium in the accumulator.

[0014] Preferably, the metering device is a position sensor.

[0015] In another embodiment, the present invention provides a gas configuration method, based on the gas configuration system described in the above embodiment, the method includes:

[0016] Step S1, using the vacuum pump to evacuate the pipeline connecting the shoulder bottle, the filled gas cylinder, the accumulator and the accumulator;

[0017] Step S2, filling the gas in order from low to high saturated vapor pressure, when each liquefied gas is filled, opening the switch valve at the outlet of the shoulder bottle, so that the liquefied gas discharged from the shoulder bottle first enters the corresponding accumulator through the first one-way valve and stores a preset mass; wherein the preset mass is determined by the metering device;

[0018] Step S3, closing the switch valve of the shoulder bottle outlet, and opening the switch valves of the accumulator outlet and the inlet of the filled gas cylinder, and using the accumulator to discharge the stored liquefied gas into the filled gas cylinder;

[0019] Step S4, repeating steps S2 to S3 until the target mass of liquefied gas is configured in the gas cylinder to be filled.

[0020] Beneficial effects:

[0021] The gas configuration system and method provided by the present invention can reasonably utilize the gas energy in the double-shoulder bottle, and specifically include at least two double-shoulder bottles, a filled gas cylinder, a scale and at least two accumulators. Each double-shoulder bottle is connected to the filled gas cylinder through an accumulator, and the medium pressure is used to fill the accumulator to become a liquid medium, and then the capacity of the accumulator itself is used to discharge the stored liquid medium into the filled gas cylinder, thereby effectively utilizing the energy of the gas itself for gas transmission. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] 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 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.

[0023] Figure 1 A schematic structural diagram of a gas configuration system according to an embodiment is shown. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the individual components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0025] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. 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.

[0026] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0027] In the description of the present invention, it should be noted that if the terms "upper", "lower", "inside", "outside", "middle" and the like appear to indicate directions or positional relationships, they are based on the directions or positional relationships shown in the accompanying drawings, or are the directions or positional relationships in which the product of the invention is usually placed when in use. These are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0028] like Figure 1 As shown, the present invention provides a gas configuration system, comprising at least two double-shoulder bottles 1, a filled gas cylinder 2, a weighing device 3 and at least two accumulators 4, each double-shoulder bottle 1 is connected to the filled gas cylinder 2 through an accumulator 4, the saturated vapor pressure of the liquefied gas stored in each double-shoulder bottle 1 is different, the filled gas cylinder 2 is placed on the weighing device 3, and the state of the medium discharged from each double-shoulder bottle 1 is a gas-liquid mixed state;

[0029] When configuring the gas, fill the gas in the order of saturated vapor pressure from low to high;

[0030] When each type of liquefied gas is filled, the medium discharged from the shoulder bottle 1 first enters the accumulator 4 to become a liquid medium and is stored to a preset mass, and then the accumulator 4 is used to discharge the stored liquid medium into the filled gas cylinder 2. The above operation is repeated until the target mass of liquefied gas is configured in the filled gas cylinder 2.

[0031] In the above scheme, the gas energy in the backpack bottle 1 can be reasonably utilized, specifically including at least two backpack bottles 1, a filled gas cylinder 2, a scale 3 and at least two accumulators 4. Each backpack bottle 1 is connected to the filled gas cylinder 2 through an accumulator 4, and the medium pressure is used to fill the accumulator 4 to become a liquid medium, and then the capacity of the accumulator 4 itself is used to discharge the stored liquid medium into the filled gas cylinder 2, thereby effectively utilizing the energy of the gas itself for gas transmission.

[0032] It is known that the double-shoulder bottle is well known to those skilled in the art. It is a term for a type of gas cylinder structure in the gas cylinder standard, with a liquefied gas in a gaseous state at its inlet and a gas-liquid mixture in a gas-liquid mixed state at its outlet. In order to configure the gas more accurately, it is possible to consider using an accumulator as an intermediate transition container to pressurize the gas-liquid mixture into a liquid medium (this is because the liquid side volume of the accumulator is relatively small, so the medium at the outlet of the double-shoulder bottle is pressurized into a liquid medium after entering the accumulator). In this way, the subsequent metering device can be used to accurately meter the liquid medium, thereby ensuring that the quality of each component gas in the filled gas cylinder is more accurate.

[0033] It should be noted that when using the pressure equalization method, the gas in the gas source cylinder will become a gas after being transported to the filled cylinder due to the large volume of the filled cylinder. For example, the commonly used ethane has a critical temperature of 32.2°C and a critical pressure of 4.87MPa. Traditional compressors require multi-stage compression. This method is feasible but uneconomical for preparing mixed gases. It is even more uneconomical to liquefy a variety of liquefiable gases using multiple compressors.

[0034] Another difficulty in pressurizing liquefiable gases with compressors is that the gases from the component gas source cylinders are under pressure. Generally, electrically driven compressors need to start without pressure. Rational use of the energy stored in the raw liquefied gas and rational use of it in the transportation of the component liquefied gases are engineering and technical issues that need to be studied.

[0035] The component gases in the mixed liquefied gas have different fugacity. To ensure that there is sufficient mixed gas in the mixed liquefied gas cylinder, there must be enough component liquid to ensure the normal use of the cylinder and the occasion of use. To ensure that the filled cylinder contains a certain amount of liquid, energy is consumed to pressurize the liquefiable gas filled into the cylinder.

[0036] The gas preparation device and method provided by the present invention can reasonably utilize the energy of the liquefied gas in the double-shoulder bottle to fill the filled gas cylinder with liquefiable gas with different vapor pressures in an energy-saving manner. That is, it can reasonably utilize the gas pressure in the double-shoulder bottle to fill the filled gas cylinder with multi-component liquefiable gas and permanent gas in an energy-saving manner.

[0037] In one embodiment, the accumulator 4 is a piston accumulator.

[0038] In one embodiment, the weighing device 3 is a balance.

[0039] In one embodiment, a pressure detection device 10 and a safety valve 11 are provided on the pipeline connecting the accumulator 4 and the gas cylinder 2 to be filled.

[0040] In one embodiment, it also includes at least two first one-way valves 5 and at least two second one-way valves 6. Each shoulder bottle 1 is connected to an accumulator 4 through a first one-way valve 5, and each accumulator 4 is connected to the filled gas cylinder 2 through a second one-way valve 6.

[0041] In one embodiment, a vacuum pump 7 is also included, and the vacuum pump 7 is used to evacuate the pipelines connecting the backpack bottle 1, the filled gas cylinder 2, and the accumulator 4, as well as the accumulator 4.

[0042] In one embodiment, it also includes a switch valve 8, which is arranged on a pipeline connecting the shoulder bottle 1, the filled gas cylinder 2, and the accumulator 4.

[0043] In one embodiment, each accumulator 4 is provided with a metering device 9 for metering the mass of the medium in the accumulator 4 .

[0044] In one embodiment, the metering device 9 is a position sensor.

[0045] In addition, an embodiment of the present invention further provides a gas configuration method. Based on the gas configuration system mentioned in the above embodiment, the method includes:

[0046] Step S1, using a vacuum pump 7 to evacuate the pipeline connecting the shoulder bottle 1, the filled gas cylinder 2, and the accumulator 4, as well as the accumulator 4;

[0047] Step S2, gas filling is performed in order from low to high saturated vapor pressure. When each liquefied gas is filled, the switch valve 8 at the outlet of the shoulder bottle 1 is opened, so that the medium discharged from the shoulder bottle 1 passes through the first one-way valve 5 and first enters the corresponding accumulator 4 to become a liquid medium and is stored to a preset mass; wherein the preset mass is determined by the metering device 9;

[0048] Step S3, closing the switch valve 8 at the outlet of the shoulder bottle 1, and opening the switch valves 8 at the outlet of the accumulator 4 and the inlet of the filled gas cylinder 2, and using the accumulator 4 to discharge the stored liquid medium into the filled gas cylinder 2;

[0049] Step S4, repeating steps S2 to S3 until the target mass of liquefied gas is configured in the gas cylinder 2.

[0050] For example, to fill a 10-liter gas cylinder with 4 liters of ethane and propane mixed gas, first evacuate the gas phase space related to the filled gas cylinder, the connecting pipeline, the accumulator and the filled gas, and first fill it with gas with low saturated vapor pressure at a fixed temperature. The saturated vapor pressure of ethane at 50°C is 125KPa, and the saturated vapor pressure of propane at 50°C is 1.71MPa. The vapor pressure of ethane is low at the same temperature. The volume of the vertically installed double-shoulder bottle for storing ethane and propane is 20 liters, and the volume of the two accumulators is 2 liters. The design pressure is 10MPa. After ensuring that there is enough ethane and propane liquefied gas stored in the double-shoulder bottle, open the switch valves between the double-shoulder bottle and the accumulator respectively, so that the medium in the double-shoulder bottle flows to the corresponding accumulator. When the amount of medium flowing to the accumulator reaches 2 liters through the metering device installed in the accumulator, the accumulator When the piston reaches the specified position, first open the switch valve of the liquefied ethane accumulator outlet connected to the pipeline on the filled gas cylinder, the accumulator automatically discharges the medium on its upper part to the filled gas cylinder, and the piston of the accumulator also rises. While the medium flows to or out of the accumulator, the amount of the medium in the accumulator is detected by a metering device. If the amount of medium flowing into the accumulator does not meet the liquefied ethane filling amount when the piston in the accumulator reaches the top, the liquefied ethane needs to be replenished to the accumulator again, and the medium is repeatedly filled into the filled gas cylinder until the required amount of component medium is checked in the filled gas cylinder by a scale. When the liquefied ethane gas with low saturated vapor pressure is filled, the propane gas with high saturated vapor pressure is filled, and the double-shoulder bottle containing high saturated vapor pressure gas and the accumulator connected thereto are activated twice, and the filled gas cylinder is filled in the same way as the gas with low saturated vapor pressure.

[0051] It can be understood that the gas configuration method provided in this embodiment and the gas configuration system provided in the above embodiment are based on the same inventive concept, so the two have the same beneficial effects and will not be described in detail here.

[0052] It should be noted that, in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0053] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A gas configuration system, characterized in that: It comprises at least two shoulder bottles, a filled gas cylinder, a weighing device and at least two accumulators, each of the shoulder bottles is connected to the filled gas cylinder through an accumulator, the saturated vapor pressure of the liquefied gas stored in each shoulder bottle is different, the filled gas cylinder is placed on the weighing device, the inlet of the shoulder bottle is gaseous liquefied gas, the outlet is a gas-liquid mixture in a gas-liquid mixed state, and the state of the medium discharged from each shoulder bottle is a gas-liquid mixed state; When configuring the gas, fill the gas in the order of saturated vapor pressure from low to high; When each type of liquefied gas is filled, the medium discharged from the double-shoulder bottle first enters the corresponding accumulator to become a liquid medium and is stored to a preset mass, and then the accumulator is used to discharge the stored liquid medium into the filled gas cylinder. The above operation is repeated until the target mass of liquefied gas is configured in the filled gas cylinder.

2. The gas configuration system according to claim 1, characterized in that: The accumulator is a piston accumulator.

3. The gas configuration system according to claim 1, characterized in that: The weighing instrument is a balance.

4. The gas configuration system according to claim 1, characterized in that: A pressure detection device and a safety valve are arranged on the pipeline connecting the accumulator and the filled gas cylinder.

5. The gas configuration system according to any one of claims 1 to 4, characterized in that: It also includes at least two first one-way valves and at least two second one-way valves, each of the shoulder bottles is connected to an accumulator via one of the first one-way valves, and each of the accumulators is connected to the filled gas cylinder via one of the second one-way valves.

6. The gas configuration system according to claim 5, characterized in that: It also includes a vacuum pump, which is used to evacuate the pipeline connecting the shoulder bottle, the filled gas cylinder, the accumulator and the accumulator.

7. The gas configuration system according to claim 6, characterized in that: It also includes a switch valve, which is arranged on a pipeline connecting the shoulder bottle, the filled gas cylinder, and the accumulator.

8. The gas configuration system according to claim 7, characterized in that: Each of the accumulators is provided with a metering device for measuring the mass of the medium in the accumulator.

9. The gas configuration system according to claim 8, characterized in that: The metering device is a position sensor.

10. A gas configuration method, characterized in that: Based on the gas configuration system according to claim 8, the method comprises: Step S1, using the vacuum pump to evacuate the pipeline connecting the shoulder bottle, the filled gas cylinder, the accumulator and the accumulator; Step S2, filling the gas in order from low to high saturated vapor pressure, when filling each liquefied gas, opening the switch valve at the outlet of the shoulder bottle, so that the medium discharged from the shoulder bottle passes through the first one-way valve and first enters the corresponding accumulator to become a liquid medium and is stored to a preset mass; wherein the preset mass is determined by the metering device; Step S3, closing the switch valve at the outlet of the shoulder bottle, and opening the switch valves at the outlet of the accumulator and the inlet of the filled gas cylinder, and using the accumulator to discharge the stored liquid medium into the filled gas cylinder through the second one-way valve; Step S4, repeating steps S2 to S3 until the target mass of liquefied gas is configured in the gas cylinder to be filled.

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