SU893239A1 - Unit for drying compressed air - Google Patents

Description

one

The invention relates to a technique for treating gases in various sectors of the national economy, for example in the chemical, gas industry, where it is necessary to use purified gases, and is used primarily for drying and cleaning in drilling rigs.

A known installation for adsorption gas cleaning, comprising two adsorbers, a dry air outlet, an oil separator, and til.

A unit for drying compressed air is also known, which includes a compressor, a cooler, two adsorbers with cavities for the adsorbent and heat carrier, and nozzles for the heat transfer medium, moist and dry air, the dry air line, and the humid air line G2.

The disadvantages of the known installation are the need to use additional energy-intensive heaters and blowers, as well as the inability to regulate the degree of drying of compressed air to the consumer.

The purpose of the invention is to increase the efficiency of the installation.

This goal is achieved by the fact that the installation, which includes a compressor, a cooler, two adsorbers with inlet and outlet air ducts and a heat carrier and a humid and dried air line, is equipped with ejectors installed

10 on the humid air line in front of the refrigerator and on the dried air line, and the cavity for the adsorbent is connected to the humid air line.

15

It is advisable that the installation be equipped with a heater connected to the cavity for the heat carrier and to the compressor.

On. the drawing is a diagram

20 setanoeki.

The compressed air drying unit consists of compressor 1 with tank 2, end cooler 3, water / oil separator 4, collection of 5 dry air, adsorbers 6 and 7, line 8 of humid air with valves 9 and 10, line

11 dried air with valves

12 and 13, the regeneration air outlet Il with valves 15,

16 and 17 and an ejector 18, a preheater 19, a heating air line 20 with valves 21-24, an ejector 25, a compressed air consumer 26, a dry air line 27 with a valve 30 and an electrolyte segment.

The installation works as follows.

The air from the compressor 1 enters the tank 2, the end cooler 3, the oil / water separator 4, into the line 8, and from it into the adsorbers 6 and 7, which operate on an 8-hour cycle. In the case of compressed air drying in the adsorber 6, the compressed air enters the adsorption through the valve 9, the adsorbent passes and with a dew point of about -40 ° C through the valve 12 is injected into the air collector 5 of dry air, from which it is directed to the consumer 26.

Part of the compressed air after the compressor with a temperature of 120-140 ° C is sent to the heater 19, where it is heated up to 240-260 ° C, and further along the heating air line 20 through the valve 24 to the adsorber 7, where the passage through the tube space is convective Preheats the adsorbent and through the valve 21 and the ejector 25 is sent to the cooler 3. The adsorber 7 is regenerated by a part of the dried air that flows through the valve 13.

After desorption, air through valves 15 and 17 through line 14 and ejector 18 is sent to cooler 3. After three hours of regeneration, valve 17 closes, cooling the regenerated adsorbent layer with dry air, which after the adsorber passes through the cooling air line 29 through valve 30, ejector 31 and is mixed with the dried air of line 11.

After cooling the regenerated adsorbent to 20-25 ° C, adsorbers b and 7 are switched and the cycle is repeated. All valves are switched automatically with control of the air flow temperatures.

Highway 27 serves to mix undrained and dried air streams in adsorbers.

The proposed installation prevents the loss of compressed air for the regeneration and cooling of the adsorbent, so

as heating and regenerating air flows with the help of ejectors are returned to the refrigerator, and cooling to the dried air mainline.

The proposed installation allows to use for the regeneration of the adsorbent. The heat of compressed air leaving the compressor with a temperature of 120-140 ° C. The subsequent increase in the temperature of the heating air to 240-260 ° C is carried out in a preheater using electrical heating or heat of exhaust gases of a diesel compressor station, which leads to savings in regeneration energy.,

The adsorbents used make it possible to obtain air with a dew point of 40-70 s, which is not always required by drilling technology and, therefore, economically unjustified.

Q To improve efficiency in such cases, the proposed installation provides for the consumer to mix a stream of dry and dried air in the canister.

Claims (2)

1. Installation for drying compressed air, including a compressor, a cooler, two adsorbers with cavities for the adsorbent and heat carrier and nozzles for the heat inlet and outflow, moist and dry air, the air dry drain line 5 and the air intake manifold that is connected to the heat outlet inlet, which differs so that, in order to increase the efficiency of the installation, it is equipped with ejectors installed on the humid air line in front of the refrigerator and on the dried air line, and the cavity for the adsorbent connected to the highway humid air. 2. Installation according to claim 1, characterized in that it is provided with a preheater, connected with a cavity for the heat carrier and with a compressor. . Sources of information taken into account in the examination 1. Author's certificate of the USSR 321274, cl. B 01 D 53/26, 1975. 2. The patent of the USA 3568406, 5 кл. 53-33, 1968.