阅读说明：本技术 一种低温气体供应系统 (Low-temperature gas supply system ) 是由 王俊杰 高诏诏 季伟 郭璐娜 陈六彪 郭嘉 于 2019-10-11 设计创作，主要内容包括：本发明涉及工业生产供气技术领域,提供一种低温气体供应系统,包括：低温储罐、气化器、缓冲罐和旁通管道,低温储罐的出口与气化器的入口连通,气化器的出口与缓冲罐的下部连通；旁通管道的一端与第一管道连通,旁通管道的另一端与缓冲罐的上部连通；旁通管道上装设有第一流量调节部件,第二管道上装设有第二流量调节部件。本发明提供的低温气体供应系统,利用自身的气化器将低温液体汽化为低温气体,同时通过旁通管道引出低温液体对低温气体进行降温,结合第一流量调节部件和第二流量调节部件的流量控制,可实现低温气体的温度和压力的精确控制,同时也能满足低温气体流量的精确输出,可间歇供应低温气体,系统操作简单,成本较低,能耗较少。(The invention relates to the technical field of industrial production gas supply, and provides a low-temperature gas supply system, which comprises: the low-temperature storage tank is communicated with the inlet of the gasifier, and the outlet of the gasifier is communicated with the lower part of the buffer tank; one end of the bypass pipeline is communicated with the first pipeline, and the other end of the bypass pipeline is communicated with the upper part of the buffer tank; the bypass pipeline is provided with a first flow regulating component, and the second pipeline is provided with a second flow regulating component. According to the low-temperature gas supply system provided by the invention, the low-temperature liquid is vaporized into the low-temperature gas by using the gasifier, the low-temperature liquid is led out through the bypass pipeline to cool the low-temperature gas, the flow control of the first flow regulating component and the second flow regulating component is combined, the accurate control of the temperature and the pressure of the low-temperature gas can be realized, the accurate output of the flow of the low-temperature gas can be met, the low-temperature gas can be intermittently supplied, the system is simple to operate, the cost is lower, and the energy consumption is less.)

1. A cryogenic gas supply system comprising: the low-temperature storage tank is used for containing low-temperature liquid;

an outlet of the low-temperature storage tank is communicated with an inlet of the gasifier through a first pipeline, and an outlet of the gasifier is communicated with the lower part of the buffer tank through a second pipeline;

one end of the bypass pipeline is communicated with the first pipeline, and the other end of the bypass pipeline is communicated with the upper part of the buffer tank;

the bypass pipeline is provided with a first flow regulating component, the second pipeline is provided with a second flow regulating component, and the buffer tank is provided with a low-temperature gas outlet.

2. A cryogenic gas supply system according to claim 1, wherein an atomisation device is arranged inside the upper part of the buffer tank, the atomisation device being connected to the bypass conduit.

3. A cryogenic gas supply system according to claim 1 or 2, wherein a fan is arranged inside the lower part of the buffer tank, the fan being in abutment with the air outlet of the second conduit.

4. A cryogenic gas supply system according to claim 3, further comprising: the booster pump and the stop valve are sequentially arranged on the first pipeline along the flowing direction of the low-temperature liquid;

the connection of the bypass pipeline and the first pipeline is positioned between the stop valve and the gasifier.

5. The cryogenic gas supply system of claim 1 further comprising: the buffer tank comprises a temperature detection component, a pressure detection component and a control component, wherein the temperature detection component and the pressure detection component are both connected with the control component and are both arranged inside the buffer tank;

the first flow regulating member and the second flow regulating member are both connected to the control member.

6. A cryogenic gas supply system according to claim 1 or 5, wherein the first and second flow regulating components are both flow control valves.

7. A cryogenic gas supply system according to claim 5, further comprising a wireless transmission module connected to the control component for enabling communication of the control component with an external device.

8. A cryogenic gas supply system according to claim 1 wherein the gasifier is an air temperature gasifier, a circulating hot water gasifier, a steam heated water gasifier or an electrically heated gasifier.

9. A cryogenic gas supply system according to claim 3 wherein the fan is a centrifugal fan or an axial fan.

10. A cryogenic gas supply system according to claim 3 wherein the temperature of the gas in the buffer tank is in the range-100 ℃ to-190 ℃The pressure range is 2-70 bar, the flow range is 0-100000 Nm³/h。

Technical Field

The invention relates to the technical field of industrial production gas supply, in particular to a low-temperature gas supply system.

Background

The method is widely applied to low-temperature gas in the fields of low-temperature zone chemical process, research and development test process, aerospace low-temperature system and the like. The conventional low-temperature gas supply uses a refrigerator to directly cool the normal-temperature gas. At present, the supply of low-temperature gas is mainly realized by gas-liquid mixing or heat exchange and other modes, such as mixed low-temperature gas prepared by mixing two gases with different temperatures by an ejector mechanism.

The refrigerator is used for directly cooling the normal temperature gas, so that the energy consumption is large, the equipment cost is high, the temperature fluctuation of the low temperature gas is large, and the intermittent supply of the low temperature gas is not suitable. The low-temperature liquid is gasified by using the gasifier, but the temperature of the gas at the outlet of the existing gasifier is near the room temperature, so that the temperature requirement of the low-temperature gas in industrial production cannot be met.

Disclosure of Invention

Technical problem to be solved

The invention aims to provide a low-temperature gas supply system to solve or partially solve the problem that the existing low-temperature gas supply mode cannot accurately control the temperature and the pressure of output low-temperature gas.

(II) technical scheme

In order to solve the above technical problem, an embodiment of the present invention provides a cryogenic gas supply system, including: the low-temperature storage tank is used for containing low-temperature liquid;

an outlet of the low-temperature storage tank is communicated with an inlet of the gasifier through a first pipeline, and an outlet of the gasifier is communicated with the lower part of the buffer tank through a second pipeline;

one end of the bypass pipeline is communicated with the first pipeline, and the other end of the bypass pipeline is communicated with the upper part of the buffer tank;

the bypass pipeline is provided with a first flow regulating component, the second pipeline is provided with a second flow regulating component, and the buffer tank is provided with a low-temperature gas outlet.

Preferably, an atomization device is arranged on the inner side of the upper part of the buffer tank, and the atomization device is connected with the bypass pipeline.

Preferably, a fan is arranged on the inner side of the lower part of the buffer tank, and the fan is in butt joint with an air outlet of the second pipeline.

Preferably, the cryogenic gas supply system further comprises: the booster pump and the stop valve are sequentially arranged on the first pipeline along the flowing direction of the low-temperature liquid;

the connection of the bypass pipeline and the first pipeline is positioned between the stop valve and the gasifier.

Preferably, the cryogenic gas supply system further comprises: the buffer tank comprises a temperature detection component, a pressure detection component and a control component, wherein the temperature detection component and the pressure detection component are both connected with the control component and are both arranged inside the buffer tank;

the first flow regulating member and the second flow regulating member are both connected to the control member.

Preferably, the first flow regulating member and the second flow regulating member are both flow control valves.

Preferably, the low-temperature gas supply system further comprises a wireless transmission module, and the wireless transmission module is connected with the control component and is used for realizing communication connection between the control component and external equipment.

Preferably, the gasifier is an air-temperature gasifier, a circulating hot water gasifier, a steam heating water gasifier or an electric heating gasifier.

Preferably, the fan is a centrifugal fan or an axial fan.

Preferably, the gas in the tank is bufferedThe temperature of the body is-100 to-190 ℃, the pressure is 2 to 70bar, and the flow is 0 to 100000Nm³/h。

(III) advantageous effects

According to the low-temperature gas supply system provided by the embodiment of the invention, the low-temperature liquid in the low-temperature storage tank is vaporized by utilizing the gasifier of the low-temperature gas supply system to generate the low-temperature gas, the low-temperature liquid is led out through the bypass pipeline to cool the low-temperature gas, and the temperature and the pressure of the low-temperature gas can be accurately controlled by combining the flow control of the first flow regulating component and the flow control of the second flow regulating component, so that the temperature and the pressure requirements of industrial production on the low-temperature gas are met; meanwhile, the system can meet the requirement of accurate output of low-temperature gas flow, can intermittently supply low-temperature gas, and is simple in system operation, low in cost and low in energy consumption.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a schematic diagram of the connection of a cryogenic gas supply system according to an embodiment of the present invention;

in the figure: 1-a low-temperature storage tank; 2-a flow indicator; 3, a booster pump; 4. a stop valve; 5-a gasifier; 6-a second flow regulating component; 7-a first flow regulating component; 8-an atomizing device; 9-a fan; 10-a buffer tank; 11-a first conduit; 12-a second conduit; 13-a bypass conduit; 14-cryogenic gas outlet.

Detailed Description

The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring to fig. 1, an embodiment of the present invention provides a cryogenic gas supply system, including: the low-temperature storage tank 1 is filled with low-temperature liquid, the low-temperature liquid is used as a source of low-temperature gas, and meanwhile, the control of the temperature and the pressure of the low-temperature gas is facilitated.

The vaporizer 5 is used for converting low-temperature liquid in the low-temperature storage tank 1 into gas through heat exchange of a heat source, the vaporizer comprises an inlet and an outlet, the liquid enters the vaporizer 5 from the inlet, and the vaporized gas is discharged from the outlet. In this embodiment, the outlet of the low-temperature storage tank 1 is communicated with the inlet of the vaporizer 5 through the first pipe 11, and the outlet of the vaporizer 5 is communicated with the buffer tank 10 through the second pipe 12, but since the density of the gas is small compared to the liquid, the second pipe 12 needs to be communicated with the lower portion of the buffer tank 10 in order to ensure the mixing effect.

Meanwhile, the low-temperature gas supply system further comprises a bypass pipeline 13, one end of the bypass pipeline 13 is communicated with the first pipeline 11, and the low-temperature gas supply system can be realized through pipe fittings such as a tee joint. The other end of bypass pipeline 13 communicates with the upper portion of buffer tank 10, guarantees that the liquid that flows out from bypass pipeline 13 can free fall under the action of gravity, is convenient for carry out cooling to the gas of following exhaust in the second pipeline.

The buffer tank 10 serves as a container for precisely controlling the temperature and pressure of the low-temperature gas, and the mixing of the liquid and the gas can be performed inside the buffer tank. The side of the buffer tank 10 is provided with a low-temperature gas outlet 14, and the low-temperature gas outlet 14 is connected with external gas equipment, so that the external gas equipment is provided.

In order to strictly control the pressure and temperature in the buffer tank 10 in the embodiment, the bypass pipeline 13 is provided with the first flow regulating component 7, the second pipeline 12 is provided with the second flow regulating component 6, the temperature and pressure of certain flow of low-temperature gas can be accurately controlled by matching the first flow regulating component 7 and the second flow regulating component 6, and the low-temperature gas can be supplied intermittently.

Specifically, the cryogenic liquid in the cryogenic storage tank 1 is divided into two streams by a first pipeline 11, wherein one stream is vaporized into gas by a vaporizer 5, enters a buffer tank 10 by a second pipeline 12, and enters the buffer tank 10 from the bottom of the buffer tank 10 through a fan 9 for enhancing heat exchange.

The other fluid enters the buffer tank 10 from the top of the buffer tank 10 through a bypass pipeline 13, the temperature in the buffer tank 10 deviates from a set value, and the first flow regulating component 7 controls the flow of the low-temperature liquid in the bypass pipeline 13, so that the temperature of the buffer tank 10 reaches the set value; when the pressure in the buffer tank 10 deviates from the set value, the second flow rate adjustment part 6 controls the flow rate of the vaporized gas, thereby achieving that the pressure of the buffer tank 10 reaches the set value. The total output flow of the cryogenic liquid can be characterized by installing a flow indicator 2 on the first pipeline 11, and the flow indicator 2 can specifically adopt a flow meter or a flow control valve with a flow reading function.

According to the low-temperature gas supply system provided by the embodiment, the low-temperature liquid in the low-temperature storage tank is vaporized by the gasifier to generate the low-temperature gas, the low-temperature liquid is led out through the bypass pipeline to cool the low-temperature gas, and the temperature and the pressure of the low-temperature gas can be accurately controlled by combining the flow control of the first flow regulating component and the flow control of the second flow regulating component, so that the temperature and the pressure requirements of industrial production on the low-temperature gas are met; meanwhile, the system can meet the requirement of accurate output of low-temperature gas flow, can intermittently supply low-temperature gas, and is simple in system operation, low in cost and low in energy consumption.

On the basis of the above-mentioned embodiment, atomizing device 8 has been arranged to the top inboard of buffer tank 10, and atomizing device 8's entry and bypass pipe 13 are close to the one end of buffer tank 10 and are connected, and atomizing device 8's export is down for the cryogenic liquids who flows out from bypass pipe 13 can atomize and with gaseous abundant heat transfer, thereby improve the cooling heat exchange efficiency to cryogenic gases.

Further, in order to strengthen the mixing uniformity of low-temperature gas in the buffer tank 10, the fan 9 is arranged on the inner side of the bottom of the buffer tank 10, the fan 9 is in butt joint with the outlet of the second pipeline 12, namely, the outlet of the second pipeline 12 faces the blade of the fan 9, the low-temperature gas flowing out of the second pipeline 12 can be blown away by the fan 9 in time, the heat exchange effect is strengthened, and the generation of accumulated liquid is prevented. The fan 9 may be a centrifugal fan or an axial fan.

Specifically, the low-temperature liquid in the low-temperature storage tank 1 is divided into two streams through a first pipeline 11, wherein one stream is vaporized into gas through a vaporizer 5, and then enters a buffer tank 10 from the bottom of the buffer tank 10 through a second pipeline 12 by enhancing heat exchange through a fan 9; the other stream enters the buffer tank 10 from the top of the buffer tank 10 through the atomization device 8 through a bypass pipe 13.

On the basis of the above embodiments, further, in order to ensure that the cryogenic liquid is delivered and prevent the cryogenic liquid and the gas from flowing backwards, in this embodiment, the first pipeline is further provided with the booster pump 3 and the stop valve 4, and the booster pump 3 and the stop valve 4 are sequentially arranged along the flow direction of the cryogenic liquid. Meanwhile, in order to enable the shut-off valve 4 to control the cryogenic liquid output of the entire system, the junction of the bypass pipe 13 and the first pipe 11 is located between the shut-off valve 4 and the vaporizer 5. In addition, the booster pump 3 in the cryogenic gas supply system is preferably a cryogenic pump, but it is also possible to use a self-pressurization device of the cryogenic tank 1 to achieve pressurization of the entire system.

In addition to the above embodiments, in order to monitor and control the temperature and the pressure in the buffer tank 10, a temperature detecting component, a pressure detecting component, and a control component are further included in the present embodiment. Wherein, temperature-detecting element and pressure detection component both arrange in the inside of buffer tank 10 for detect the temperature and the pressure in buffer tank 10.

Meanwhile, the temperature detection part and the pressure detection part are both connected with the control part, and the first flow regulation part 7 and the second flow regulation part 6 are also both connected with the control part, in which a target temperature and a target pressure value can be stored in advance.

Specifically, when the control component detects that the temperature in the buffer tank 10 deviates from a set value, the control component drives the first flow regulating component 7 to control the flow of the low-temperature liquid in the bypass pipeline 13, so that the temperature of the buffer tank 10 reaches the set value; when the control part detects that the pressure in the buffer tank 10 deviates from the set value, the second flow regulating part 6 is driven to control the flow of the vaporized gas, so that the pressure of the buffer tank 10 reaches the set value.

Wherein, the control component includes but is not limited to an integrated circuit chip or a programmable logic controller, and the regulation and control of the gas temperature and pressure in the buffer tank are performed through PID (proportional, integral, differential) control of the first flow regulating component 7 and the second flow regulating component 6, so as to reach the preset temperature and pressure; the temperature detection means is a low temperature sensor, the pressure detection means is an air pressure sensor (for example, BA5803, BP5607, BT5611, etc.), and the first flow rate adjustment means 7 and the second flow rate adjustment means 6 are flow rate control valves. The temperature range of the gas in the buffer tank 10 is-100 to-190 ℃, the pressure range is 2 to 70bar, and the flow range is 0 to 100000Nm³/h。

On the basis of the above embodiment, further, the low-temperature gas supply system in this embodiment further includes a wireless transmission module, the wireless transmission module is connected with the control component, and the control module can also send information such as pressure, temperature and flow information of the buffer tank 10 and current control conditions to peripheral equipment in real time through the wireless transmission module, for example, a WIFI module, so that an administrator can know the information in real time. The peripheral equipment comprises but is not limited to a mobile phone and a computer, and the peripheral equipment can monitor the pressure and the temperature in the buffer tank 10 in real time through the wireless transmission module and participate in direct control through the wireless transmission module.

The manager can monitor the information of the control module in real time through peripheral equipment, remotely control the command of the control module, drive the first flow regulating component 7 and the second flow regulating component 6 to generate actions to realize the regulation and control of the temperature and the pressure in the buffer tank 10, simplify the operation and improve the safety of the operation.

In addition to the above embodiments, the vaporizer 5 may be an air-temperature vaporizer, a circulating hot water vaporizer, a steam-heated water vaporizer, or an electric heating vaporizer. Wherein, the air-temperature type gasifier is preferably selected, and the air-temperature type gasifier can greatly reduce the energy consumption and the thermal pollution to the environment.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.