CN111921338A

CN111921338A - Energy-saving equipment of PSA gas separation system

Info

Publication number: CN111921338A
Application number: CN202010755937.5A
Authority: CN
Inventors: 仇雪松; 杨开乔; 刘欣; 高峰
Original assignee: Suzhou Since Gas Technology Co Ltd
Current assignee: Suzhou Since Gas Technology Co Ltd
Priority date: 2020-07-31
Filing date: 2020-07-31
Publication date: 2020-11-13

Abstract

The invention discloses energy-saving equipment of a PSA gas separation system, which comprises a control module, an air compressor, a compressed air purification module, a PSA adsorption module, a flowmeter, an automatic flow regulating valve, a buffer tank, a ball valve and a pressure transmitter, wherein the control module is connected with the air compressor; control module with air compressor machine, compressed air purification module, PSA adsorption module, flowmeter, automatic flow control valve and pressure transmitter electric connection, air compressor machine, compressed air purification module, PSA adsorption module, flowmeter, automatic flow control valve, buffer tank, ball valve, pressure transmitter loop through the pipeline and link to each other. The invention adopts the variable frequency air compressor, when the actual gas consumption is reduced, the variable frequency air compressor can save the economic cost by frequency modulation, programs aiming at different working conditions can be set in advance according to the working conditions of a client on site, when the required gas production is less than the rated gas production of the equipment, the product gas outlet valve is automatically adjusted to reduce the gas output, and simultaneously, the corresponding program is called to ensure the purity of the product gas.

Description

Energy-saving equipment of PSA gas separation system

Technical Field

The invention belongs to the technical field of gas separation energy conservation, and particularly relates to energy-saving equipment of a PSA gas separation system.

Background

At present, when a customer purchases PSA gas separation equipment, the model of the gas separation equipment is generally selected according to the maximum gas demand, and after the operation condition of a PSA gas separation system is mostly the debugging of an initial supplier, the user continues initial debugging parameters to operate the equipment for a long time regardless of the change of factors such as the use working condition, the gas consumption, the electricity price and the like. However, the conditions in most customer sites are variable, and there are peak periods, low peak periods, or intermittent uses of gas.

Under the prior art (see fig. 1), a customer needs to move the opening of the manual valve 6 according to the field working condition (gas consumption peak time or intermittent gas consumption) to reduce the outlet gas quantity so as to meet the field use requirement. But the debugging parameters in the control module 1 are not changed at this time, because the actual gas production is less than the rated gas production of the equipment, the PSA adsorption module 4 will produce a product gas with higher purity, and under certain specific gas utilization processes, the increase of the product gas purity is unfavorable for normal production, thereby causing the reduction of production quality. Accordingly, at this time, the preceding stage fixed frequency air compressor 2 is automatically unloaded to empty the redundant air, resulting in a great loss of energy. Therefore, under such circumstances, it is necessary to consider how to achieve the best energy-saving operation of the system, which results in the lowest operation cost for the client.

Disclosure of Invention

The invention overcomes the defects of the prior art and provides energy-saving equipment of a PSA gas separation system to solve the problems in the prior art.

In order to achieve the purpose, the invention adopts the technical scheme that: an energy-saving device of a PSA gas separation system comprises a control module, an air compressor, a compressed air purification module, a PSA adsorption module, a flow meter, an automatic flow regulating valve, a buffer tank, a ball valve and a pressure transmitter; control module with air compressor machine, compressed air purification module, PSA adsorption module, flowmeter, automatic flow control valve and pressure transmitter electric connection, air compressor machine, compressed air purification module, PSA adsorption module, flowmeter, automatic flow control valve, buffer tank, ball valve, pressure transmitter loop through the pipeline and link to each other.

In a preferred embodiment of the present invention, the air compressor is a variable frequency air compressor.

In a preferred embodiment of the invention, the buffer tank is filled with gas.

The invention solves the defects in the background technology, and has the following beneficial effects:

the invention adopts the variable frequency air compressor, when the actual gas consumption is reduced, the variable frequency air compressor can reduce the energy consumption per se by frequency modulation, thereby saving the economic cost, and the invention can set programs aiming at different working conditions in advance according to the working conditions of a client on site, when the required gas production is less than the rated gas production of the equipment, the product gas outlet valve is automatically adjusted, so that the gas output is reduced, and simultaneously the corresponding program is called, thereby ensuring the purity of the product gas.

Drawings

The invention is further explained below with reference to the figures and examples;

FIG. 1 is a schematic diagram of the overall structure of the prior art;

FIG. 2 is a schematic overall structure of the preferred embodiment of the present invention;

in the figure: 1. a control module; 2. a fixed frequency air compressor; 3. a compressed air purification module; 4. a PSA adsorption module; 5. a flow meter; 6. a manual valve; 7. a buffer tank; 8. a ball valve; 9. a pressure gauge; 10. an air compressor; 11. an automatic flow regulating valve; 12. a pressure transmitter.

Detailed Description

The invention will now be described in further detail with reference to the accompanying drawings and examples, which are simplified schematic drawings and illustrate only the basic structure of the invention in a schematic manner, and thus show only the constituents relevant to the invention.

As shown in fig. 1 and fig. 2, an energy saving device of a PSA gas separation system includes a control module 1, an air compressor 10, a compressed air purification module 3, a PSA adsorption module 4, a flow meter 5, an automatic flow regulating valve 11, a buffer tank 7, a ball valve 8, and a pressure transmitter 12; control module 1 and air compressor machine 10, compressed air purification module 3, PSA adsorption module 4, flowmeter 5, automatic flow control valve 11 and pressure transmitter 12 electric connection, and air compressor machine 10, compressed air purification module 3, PSA adsorption module 4, flowmeter 5, automatic flow control valve 11, buffer tank 7, ball valve 8, pressure transmitter 12 loop through the pipeline and link to each other.

In this embodiment, the compressed air from the air compressor 10 passes through the compressed air purification module 3 to remove particle dust, water and oil, then the clean grinding air enters the PSA adsorption module 4 to be pressure swing adsorbed, the generated high-purity gas passes through the flow meter 5 to be detected to be qualified, then the flow of the product gas outlet is controlled by the automatic flow control valve 11 to enter the buffer tank 7, and the product gas from the buffer tank 7 is supplied to the rear-stage client for use.

In this embodiment, the control module 1 may set programs of different working conditions according to the working conditions of the field reaction, and generally includes two conditions of decreasing the gas consumption and decreasing the gas consumption, where the specific adjustment method is as follows:

(1) on-site gas consumption is reduced from big to small

At the moment, the pressure transmitter 12 displays high pressure in the buffer tank 7 to alarm, namely, the fact that the gas consumption of the later stage is reduced is detected, the pressure transmitter 12 feeds back the pressure to the control module 1 through an electric signal, and the control module 1 gives an instruction to the automatic flow regulating valve 11 to automatically reduce the opening degree of a valve port so as to reduce the flow of the product gas outlet. Then, the control module 1 calls a corresponding program to prolong the adsorption time of the PSA adsorption module 4 according to the actual flow fed back by the flow meter 5, so as to control the purity of the real-time product gas. Meanwhile, the control module 1 gives an instruction to the air compressor 10, so that the air volume of the compressed air is reduced and the energy consumption is reduced by adjusting the self frequency.

(2) The gas consumption on site is changed from small to big

At the moment, the pressure transmitter 12 displays that the pressure in the buffer tank 7 is low and gives an alarm, namely, the gas consumption of the later stage is detected to be increased, the pressure transmitter 12 feeds back the pressure to the control module 1 through an electric signal, and the control module 1 gives an instruction to the automatic flow regulating valve 11 to automatically increase the opening degree of a valve port so as to increase the flow of the product gas outlet. Then, the control module 1 calls a corresponding program to shorten the adsorption time of the PSA adsorption module 4 according to the actual flow fed back by the flow meter 5, thereby controlling the purity of the real-time product gas. Meanwhile, the control module 1 gives an instruction to the air compressor 10, so that the air compressor increases the air volume of the compressed air by adjusting the self frequency, and the normal operation of the equipment is ensured.

The invention can adjust the whole system in real time according to different working conditions of the client site to enable the system to operate under the condition of the optimal energy consumption ratio, thereby reducing the client operation cost and avoiding the waste of resources (electric energy); meanwhile, the process is simple and reliable, automatic operation is realized, and great convenience is brought to field use of customers.

Specifically, in the present embodiment, the air compressor 10 is an inverter air compressor.

Specifically, in the present embodiment, the buffer tank 7 is filled with a gas which is in accordance with the kind of gas produced by the present system.

In summary, the variable frequency air compressor 10 is adopted, when the actual gas consumption is reduced, the variable frequency air compressor 10 can reduce the energy consumption per se through frequency modulation, so that the economic cost is saved, programs aiming at different working conditions can be set in advance according to the working conditions of a client on site, when the required gas production is smaller than the rated gas production of the equipment, the product gas outlet valve is automatically adjusted, the gas output is reduced, and meanwhile, the corresponding program is called to ensure the purity of the product gas.

In light of the foregoing description of the preferred embodiment of the present invention, it is to be understood that various changes and modifications may be made by one skilled in the art without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.

Claims

1. The energy-saving equipment of the PSA gas separation system is characterized by comprising a control module, an air compressor, a compressed air purification module, a PSA adsorption module, a flowmeter, an automatic flow regulating valve, a buffer tank, a ball valve and a pressure transmitter; control module with air compressor machine, compressed air purification module, PSA adsorption module, flowmeter, automatic flow control valve and pressure transmitter electric connection, air compressor machine, compressed air purification module, PSA adsorption module, flowmeter, automatic flow control valve, buffer tank, ball valve, pressure transmitter loop through the pipeline and link to each other.

2. The energy-saving equipment of the PSA gas separation system according to claim 1, wherein the air compressor is a variable frequency air compressor.

3. The PSA gas separation system economizer of claim 1 wherein the surge tank contains gas.