CN217926226U - Energy-saving air compression system - Google Patents

Abstract

The utility model discloses an energy-saving air compression system, which has the technical proposal that the energy-saving air compression system comprises a first air compressor, a second air compressor, a buffer tank, a main pressure reducing valve and a pressure relief valve; the main pressure reducing valve is arranged at an outlet of the first air compressor, an air outlet of the main pressure reducing valve is communicated with the buffer tank, the buffer tank is communicated with an outlet of the second air compressor, and the pressure relief valve is arranged on the buffer tank; the first air compressor rated pressure is higher than the second air compressor rated pressure. The utility model discloses be in the same place two air compressor bridges, when first air compressor exit gas pressure surpassed the limiting value, can carry out the air feed for second air compressor's exit jointing equipment with unnecessary gas outgoing to the buffer tank, reduce second air compressor's energy consumption.

Description

Energy-saving air compression system

Technical Field

The utility model relates to an air compression field, more specifically the saying so, it relates to an energy-saving air compression system.

Background

Air separation, referred to as air separation for short, is a process of separating oxygen and nitrogen from air or simultaneously extracting rare gases such as helium and argon by using methods such as deep freezing, adsorption, membrane separation and the like by utilizing different physical properties of components in air. The specific flow of air separation is as follows: after the compressed air from air compressor is passed through molecular sieve to remove water, carbon dioxide and hydrocarbon impurities, one portion of air is directly fed into upper tower of rectification tower, and another portion is fed into expansion machine, expanded and refrigerated, and fed into lower tower. In the rectifying tower, after heat exchange between ascending steam and falling liquid, nitrogen with high purity can be obtained at the top of the upper tower, and oxygen with high purity can be obtained at the bottom of the upper tower.

When air is treated, an air compressor is used. Typically, air compressors have two uses in air separation plants, one to provide a source of power and the other to provide compressed air. The air compressors for the two purposes are separated and independently operated. The pressure of an air compressor, which provides compressed air, is typically low. The air compressor providing the power source is generally high in pressure, and during working, the situation that the pressure is too high often occurs, and emptying and pressure reduction treatment is needed to be carried out so as to prevent explosion caused by too high pressure. However, in the process of emptying and decompressing, a large amount of compressed air needs to be discharged to achieve the effect of decompressing, which causes serious waste of compressed air, and also causes serious waste of power sources (such as steam and electric energy) of the air compressor.

For the above working scenario, if the compressed air discharged by the air compressor providing the power source can be collected and used as the auxiliary air supply source of the air compressor providing the compressed air, the waste of the compressed air and the power source of the air compressor can be effectively improved.

Therefore, in the air compression field, in order to effectively utilize compressed air discharged by emptying and decompressing an air compressor providing a power source, an energy-saving air compression system has been developed, and compressed air discharged by emptying is used as an auxiliary air supply source of the air compressor providing compressed air, which is a problem to be solved in the field at present.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing an energy-saving air compression system, it is through bridging two air compressor together, when the higher first air compressor exit gas pressure of rated pressure surpassed the limit value, can be with unnecessary gas discharge to the buffer tank in, for the exit jointing equipment of second air compressor carries out the air feed, reduces second air compressor's energy consumption.

In order to achieve the above purpose, the utility model provides a following technical scheme: an energy-saving air compression system comprises a first air compressor, a second air compressor, a buffer tank, a main pressure reducing valve and a pressure relief valve; the main pressure reducing valve is installed at the outlet of the first air compressor, the air outlet of the main pressure reducing valve is communicated with the buffer tank, the buffer tank is communicated with the outlet of the second air compressor, and the pressure relief valve is installed on the buffer tank. The first air compressor rated pressure is higher than the second air compressor rated pressure.

Through adopting above-mentioned technical scheme, two air compressor bridges together in this embodiment, when first air compressor exit gas pressure surpassed the limit value, can discharge unnecessary gas to the buffer tank in, for the exit jointing equipment of second air compressor carries out the air feed, reduces second air compressor's energy consumption.

The utility model discloses further set up to: the pressure sensor is arranged on the buffer tank and is electrically connected with the second air compressor; when the pressure in the buffer tank is lower than a set value, the pressure sensor feeds back an electric signal to the second air compressor, and the second air compressor is started.

By adopting the technical scheme, when the gas in the buffer tank cannot meet the service pressure of the connecting equipment at the outlet of the second air compressor, the pressure sensor feeds back an electric signal to the second air compressor, so that the second air compressor in a closed state is started to supply gas for the equipment connected at the outlet of the second air compressor.

The utility model discloses further set up to: the buffer tank is provided with a first interface and a second interface, the air outlet of the main pressure reducing valve is communicated with the first interface, the outlet of the second air compressor is communicated with the second interface, and the first interface is lower than the second interface.

Through adopting above-mentioned technical scheme, the compressed air that gets into in the buffer tank from first interface can sink to the buffer tank bottom, follows supreme whole buffer tank that is full of down to satisfy second air compressor exit jointing equipment's service pressure.

The utility model discloses further set up to: the second interface is located buffer tank top surface.

The utility model discloses further set up to: the safety valve is arranged on the buffer tank.

Through adopting above-mentioned technical scheme, play the effect of the pressure in the supplementary relief valve control buffer tank, further improve the utility model discloses a security.

The utility model discloses further set up to: the pressure relief valve is installed between the buffer tank and the safety valve.

The utility model discloses further set up to: the safety valve is arranged on the top surface of the buffer tank.

The utility model discloses further set up to: the pressure relief valve is installed on the top surface of the buffer tank.

The utility model discloses further set up to: the air inlet and the air outlet of the auxiliary pressure reducing valve are respectively connected with the air inlet and the air outlet of the auxiliary pressure reducing valve in parallel, and the auxiliary pressure reducing valve is normally closed.

Through adopting above-mentioned technical scheme, when main relief pressure valve became invalid, can start vice relief pressure valve to guarantee the gas circuit connection between first air compressor exit and the buffer tank.

To sum up, the utility model discloses compare in prior art and have following beneficial effect: the utility model discloses be in the same place two air compressor bridges, when first air compressor exit gas pressure surpassed the limiting value, can carry out the air feed for second air compressor's exit jointing equipment with unnecessary gas outgoing to the buffer tank, reduce second air compressor's energy consumption.

Drawings

Fig. 1 is a schematic overall structure diagram of the embodiment.

In the figure: 1. a first air compressor; 2. a second air compressor; 3. a buffer tank; 4. a primary pressure relief valve; 5. a pressure relief valve; 6. a pressure sensor; 7. a safety valve; 8. and a secondary pressure reducing valve.

Detailed Description

The technical solution of the present invention will be described clearly with reference to the accompanying drawings, and it is obvious that the described embodiments are not all embodiments of the present invention, and all other embodiments obtained by those skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that the terms "center", "upper", "lower", "horizontal", "left", "right", "front", "rear", "transverse", "longitudinal", and the like indicate orientations or positional relationships based on orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.

Examples

As shown in fig. 1, which is a basic structure of the preferred embodiment of the present invention, an energy-saving air compression system includes a first air compressor 1, a second air compressor 2, a buffer tank 3, a main pressure reducing valve 4, and a pressure relief valve 5. A main pressure reducing valve 4 is installed at the outlet of the first air compressor 1 in order to prevent the explosion of excessive pressure at the outlet of the first air compressor 1. The gas outlet and the buffer tank 3 intercommunication of main relief pressure valve 4, the exit intercommunication of buffer tank 3 and second air compressor 2, relief valve 5 are installed on buffer tank 3 to 3 too big explosions of buffer tank pressure are avoided.

In this embodiment, when the pressure at the outlet of the first air compressor 1 is greater than the set value of the main pressure reducing valve 4, the main pressure reducing valve 4 is automatically opened, and the redundant gas at the outlet of the first air compressor 1 is sent to the buffer tank 3, so as to reduce the pressure at the outlet of the first air compressor 1. The gas in the buffer tank 3 can be directly output to the outlet of the second air compressor 2 to provide compressed air for the equipment connected to the outlet of the second air compressor 2. When the gas output by the buffer tank 3 meets the use pressure of the connecting equipment at the outlet of the second air compressor 2, the second air compressor 2 can be closed to save electric energy. When the pressure at the outlet of the first air compressor 1 is smaller than the set value of the main pressure reducing valve 4, the main pressure reducing valve 4 is automatically closed, and the air is preferentially supplied to equipment connected at the outlet of the first air compressor 1.

Specifically, the first air compressor 1 rated pressure is higher than the second air compressor 2 rated pressure. In this embodiment, the first air compressor 1 is a steam turbine type air compressor, and is used to provide a power source for equipment connected to an outlet of the first air compressor, and the pressure at the outlet of the first air compressor is 3.2Mpa. The second air compressor 2 is an electric air compressor for supplying compressed air to the equipment connected at its outlet, the pressure at its outlet being 0.8Mpa.

The air compressor further comprises a pressure sensor 6, wherein the pressure sensor 6 is arranged on the buffer tank 3 and used for detecting the gas pressure in the buffer tank 3, and the pressure sensor 6 is electrically connected with the second air compressor 2; when the pressure in the buffer tank 3 is lower than a set value, that is, the gas in the buffer tank 3 cannot meet the use pressure of the equipment connected to the outlet of the second air compressor 2, the pressure sensor 6 feeds back an electric signal to the second air compressor 2, so that the second air compressor 2 in a closed state is started to supply gas to the equipment connected to the outlet of the second air compressor. In the embodiment, the pressure of the buffer tank 3 does not exceed 1MPa.

Specifically, a first connector and a second connector are arranged on the buffer tank 3, an air outlet of the main pressure reducing valve 4 is communicated with the first connector, an outlet of the second air compressor 2 is communicated with the second connector, and the first connector is lower than the second connector.

The buffer tank 3 is provided with a first connector and a second connector, the air outlet of the main pressure reducing valve 4 is communicated with the first connector, the outlet of the second air compressor 2 is communicated with the second connector, and the first connector is lower than the second connector. The first air compressor 1 has a higher nominal pressure than the second air compressor 2, so that the air density delivered by the first air compressor 1 is higher than the air density delivered by the second air compressor 2. That is to say, the compressed air entering the buffer tank 3 from the first interface sinks to the bottom of the buffer tank 3, and fills the whole buffer tank 3 from bottom to top, so as to satisfy the service pressure of the connection device at the outlet of the second air compressor 2.

Specifically, the second port is located on the top surface of the buffer tank 3.

This embodiment still includes relief valve 7, and relief valve 7 is installed on buffer tank 3, plays the effect of the pressure of supplementary relief valve 5 control buffer tank 3, further improves the security of this embodiment. In this embodiment, the relief valve 5 and the relief valve 7 are both installed on the top surface of the buffer tank 3.

Specifically, the relief valve 5 is installed between the buffer tank 3 and the relief valve 7.

The embodiment also comprises an auxiliary pressure reducing valve 8, wherein the air inlet and the air outlet of the auxiliary pressure reducing valve 8 are respectively connected with the air inlet and the air outlet of the auxiliary pressure reducing valve 8 in parallel, and the auxiliary pressure reducing valve 8 is normally closed. When the primary pressure reducing valve 4 fails, the secondary pressure reducing valve 8 can be activated to ensure the air path connection between the outlet of the first air compressor 1 and the buffer tank 3.

In summary, in the present embodiment, the two air compressors are bridged together, when the gas pressure at the outlet of the first air compressor 1 with higher rated pressure exceeds the limit value, the excess gas can be discharged into the buffer tank 3 to supply gas for the connection device at the outlet of the second air compressor 2, thereby reducing the energy consumption of the second air compressor 2.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (9)

1. An energy-saving air compression system which characterized in that: the system comprises a first air compressor (1), a second air compressor (2), a buffer tank (3), a main reducing valve (4) and a pressure release valve (5); the main pressure reducing valve (4) is arranged at an outlet of the first air compressor (1), an air outlet of the main pressure reducing valve (4) is communicated with the buffer tank (3), the buffer tank (3) is communicated with an outlet of the second air compressor (2), and the pressure relief valve (5) is arranged on the buffer tank (3); the rated pressure of the first air compressor (1) is higher than that of the second air compressor (2).

2. An energy efficient air compression system as recited in claim 1 wherein: the air compressor further comprises a pressure sensor (6), the pressure sensor (6) is installed on the buffer tank (3), and the pressure sensor (6) is electrically connected with the second air compressor (2); when the pressure in the buffer tank (3) is lower than a set value, the pressure sensor (6) feeds back an electric signal to the second air compressor (2), and the second air compressor (2) is started.

3. An energy efficient air compression system as recited in claim 1 wherein: the buffer tank (3) is provided with a first connector and a second connector, an air outlet of the main pressure reducing valve (4) is communicated with the first connector, an outlet of the second air compressor (2) is communicated with the second connector, and the position of the first connector is lower than that of the second connector.

4. An energy efficient air compression system as recited in claim 3 wherein: the second interface is positioned on the top surface of the buffer tank (3).

5. An energy efficient air compression system as recited in claim 1 wherein: the safety valve (7) is further included, and the safety valve (7) is installed on the buffer tank (3).

6. An energy efficient air compression system as recited in claim 5 wherein: the pressure release valve (5) is arranged between the buffer tank (3) and the safety valve (7).

7. An energy efficient air compression system as recited in claim 5 wherein: the safety valve (7) is arranged on the top surface of the buffer tank (3).

8. An energy efficient air compression system as recited in claim 1 wherein: the pressure release valve (5) is arranged on the top surface of the buffer tank (3).

9. An energy efficient air compression system as recited in claim 1 wherein: the air inlet and the air outlet of the auxiliary pressure reducing valve (8) are respectively connected with the air inlet and the air outlet of the auxiliary pressure reducing valve (8) in parallel, and the auxiliary pressure reducing valve (8) is normally closed.

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