RU2814143C1 - Air treatment device for compressors - Google Patents

Abstract

FIELD: mechanical engineering.

SUBSTANCE: invention relates to the field of energy, oil and gas, transport and chemical engineering, namely to air treatment devices for compressors, and can be used to purify air taken from the atmosphere and prepare it for supply to the compressor. The air preparation device for the compressor contains an air intake device 1 with a sediment-retaining visor 2, a cable heating system 3, a protective mesh 4 and nozzles with pneumatic spray 5, a device for purifying air from contaminants, consisting of a vertically oriented spiral channel 6 with liquid phase traps 7 and a cylindrical centrifugal separation package installed in it formed by the upper 8 and lower 9 covers, interconnected by vertical plates 10 of an S-shaped profile, having gaps between each other and liquid phase traps 11, and in the upper cover 8 there is a channel 12 for supplying purified air to the noise suppression device 13, in the bottom cover 9 has holes for draining the separated liquid phase with trapped contaminants into the settling tank 14. The noise suppression device 13 is connected to the air duct 15 for transporting air to the compressor.

EFFECT: reducing pressure losses during air preparation for compressors and maintaining their value during operation constant and practically independent of the state of the atmosphere; simplifying the design of air treatment devices for compressors; reducing operating costs and equipment downtime.

1 cl, 4 dwg

Description

The invention relates to the field of energy, oil and gas, transport and chemical engineering, namely to air treatment devices for compressors, and can be used to purify air taken from the atmosphere and prepare it for supply to the compressor.

There are known air treatment devices that include air intake devices with weatherproof canopies and protective nets, various types of moisture separation and contaminant removal devices with functions for accumulating and removing contaminants, air heating devices to prevent icing, noise suppression devices, a bypass channel and air transport ducts to compressor (RU 2651391, published 04/19/2018; RU 2344302, published 01/20/2009; RU 2289706, published 12/20/2006; RU 2414611, published 03/20/2011; RU 2758874, op. bl. 02.11.2021; RU 2761711, published 12/13/2021; RU 2745335, published 03/24/2021).

The disadvantages of these devices are:

- large pressure losses (from 400 to 700 Pa), which increase significantly during periods of high relative humidity, during snowfalls and snow storms, as well as with the accumulation of contaminants on the filter elements of air purification devices, which leads to a decrease in the efficiency of the compressor ;

- the need to heat the air in icing conditions, which leads to a decrease in the efficiency of the compressor and an increase in energy costs;

- the need to introduce additional measures to reduce the noise level when heating air in icing conditions, which complicates and increases the cost of air treatment devices for the compressor;

- the need to periodically replace filter elements of air purification devices, which increases operating costs and the duration of periods of equipment downtime.

An air purifying device for ship power plants is known, containing a humidification system for air taken from the atmosphere with subsequent separation of the humidified air (RU 2647171, published 03/14/2018).

This solution ensures that the filter elements are cleaned of salt deposits, which allows the pressure loss on them to remain unchanged during operation, but the disadvantages listed above are also characteristic of this air treatment device.

The closest to the proposed technical solution in terms of technical essence is the highly efficient liquid-gas separator "SCV-7", containing a system of channels with a separation package for imparting rotational motion to the gas-liquid flow and deposition of film, droplet, fine, aerosol liquid and solid particles in the field of centrifugal forces ( RU 2320395, published 03/27/2008).

The present invention is aimed at eliminating these disadvantages through the use of an irrigation system for air taken from the atmosphere.

The technical result of the proposed invention is:

- reducing pressure losses during air preparation for compressors to a minimum value and maintaining their value during operation constant and practically independent of the state of the atmosphere;

- simplification of the design of air treatment devices for compressors;

- reduction of operating costs and duration of equipment downtime.

This result is achieved by the fact that the air preparation device for the compressor contains an air intake device with a weatherproof canopy, a protective mesh and a heating system located along the air flow suction, at the inlet of which nozzles with pneumatic liquid spray are installed; a device for purifying air from contaminants tangentially connected to the air intake device, made in the form of a vertically oriented spiral channel with a cylindrical separation package installed inside it in the form of vertical plates of an S-shaped profile connected to the upper and lower covers, installed with a gap between each other, while the walls of the spiral The channel and plates are equipped with liquid phase traps, the top cover has a channel for supplying purified air through a noise suppression device into the air transport duct to the compressor, and the bottom cover has holes for removing the separated liquid phase with trapped contaminants.

Nozzles with pneumatic spray ensure that an air-liquid flow with a liquid droplet diameter of 10-15 microns at the input of the air purification device from contaminants is supplied at a concentration of 0.9-1.1 g/m ³ (corresponding to dense fog), in which atmospheric pollution (industrial and natural dust, insects, water content, pollen, fluff and fibers) larger than 0.1 microns increase in size and weight to ensure that they are captured by an air purification device. The separated liquid with captured contaminants is discharged into a settling tank, from which accumulated contaminants are periodically removed. In winter, non-freezing liquid (aqueous solutions of glycols) is used for irrigation, which ensures the dissolution of moisture coming from the atmosphere in it and the prevention of icing of downstream devices along the air flow suction. Elements of the air intake channel structure that are not exposed to air-liquid flow are protected from icing in winter by means of a heating system (for example, cable or using infrared radiation).

The air purification device ensures the separation of the liquid phase with captured atmospheric contaminants and the supply of purified air to the compressor through a noise suppression device and an air duct (cleaning efficiency is more than 99.95%), which reduces operating costs and lengthens equipment downtime due to the absence of consumables (filter elements with different fineness of cleaning) and the need for their timely replacement.

The value of pressure loss in this air treatment system for compressors is no more than 120 Pa at a flow rate in the system channels from 6 to 11 m/s and is practically independent of atmospheric conditions.

The absence of elements subject to icing or significant contamination and leading to an increase in pressure losses to unacceptable values allows us to exclude air heating devices from the air preparation device for the compressor to prevent icing, as well as a bypass channel that provides air supply to the compressor in the event of an emergency increase in pressure losses in the device air preparation, which simplifies the design of the device.

The proposed air treatment device for compressors is shown in the drawings, where in FIG. 1 shows a longitudinal section of an air treatment device for compressors (arrows indicate the direction of air flow); in fig. 2 shows section A-A in FIG. 1; in fig. 3 shows zone A in FIG. 1; in fig. 4 shows zone B in FIG. 2.

The air preparation device for the compressor contains an air intake device 1 with a weatherproof canopy 2, a heating system 3, a protective mesh 4 and nozzles with pneumatic spray 5; a device for purifying air from contaminants, consisting of a vertically oriented spiral channel 6 with liquid phase traps 7 and a cylindrical separation package installed in it, formed by the upper 8 and lower 9 covers, interconnected by vertical plates 10 of an S-shaped profile, having gaps between themselves and liquid phase traps 11, and in the top cover 8 there is a channel 12 for supplying purified air to the noise suppression device 13, in the bottom cover 9 there are holes for draining the separated liquid phase with captured contaminants into the settling tank 14. The noise suppression device 13 is connected to the air transport duct 15 to the compressor (not shown).

The proposed air treatment device for compressors works as follows.

When the compressor operates under the influence of a pressure difference between the compressor inlet and the atmosphere, the air flow enters under the weatherproof canopy 2, from where it enters the air intake device 1, where it is irrigated with liquid through nozzles with pneumatic spray 5 (in winter, non-freezing liquid is used for irrigation, which ensures dissolving moisture coming from the atmosphere in it and preventing icing of the devices underlying the air flow suction. The design elements of the channel of the air intake device 1, not exposed to the air-liquid flow, protect against icing through the heating system 3. After treatment with pneumatic atomized liquid, the air-liquid flow flows through the protective mesh 4 into a vertically oriented spiral channel 6, which ensures the rotational movement of the air-liquid flow and the action of centrifugal forces on it. In this case, part of the liquid phase with captured contaminants settles on the wall of the channel with liquid phase traps 7 and, under the influence of gravity, flows onto the bottom cover 9 to drain it into settling tank 14. Next, the air-liquid flow enters the internal cavity of the cylindrical separation package through the gaps between the vertical plates 10, where part of the liquid phase is deposited on the surface of the plates 10 and traps 11 and, under the influence of gravity, flows onto the bottom cover 9 to drain it into the tank. settling tank 14. From the internal cavity, a swirling air-liquid flow is directed to channel 12, made in the cover 8, with further separation of the liquid phase due to the action of centrifugal and gravitational forces, with its deposition on the surface of the plates 10 and its concentration in the area of the outer diameter of the internal cavity of the cylindrical separation package. Before the air-liquid flow leaves the internal cavity of the cylindrical separation package through channel 12, the remaining smallest fraction of the liquid phase is deposited on the back side of the upper cover 8 in the gap between the wall of the channel 12 and the plates 10, from where it flows down the vertical structural elements to the lower cover 9 to drain it into settling tank 14. The purified air flow enters through channel 12 into the noise suppression device 13, from where it is transported through the air duct 15 to the compressor.

Claims (1)

An air preparation device for a compressor, characterized in that it contains an air intake device with a weatherproof canopy, a protective mesh and a heating system located along the air flow suction, at the inlet of which nozzles with pneumatic liquid spray are installed; a device for purifying air from contaminants tangentially connected to the air intake device, made in the form of a vertically oriented spiral channel with a cylindrical separation package installed inside it in the form of vertical plates of an S-shaped profile connected to the upper and lower covers, installed with a gap between each other, while the walls of the spiral The channel and plates are equipped with liquid phase traps, the top cover has a channel for supplying purified air through a noise suppression device into the air transport duct to the compressor, and the bottom cover has holes for removing the separated liquid phase with trapped contaminants.