SU1359596A1 - System for preparing compressed air - Google Patents

Abstract

The invention relates to refrigeration technology and may be used in compressor installations. The purpose of the invention is to reduce the specific energy consumption and improve the quality of compressed air. For this, the evaporator 7 of the second machine is installed after the first generator 5, the pneumatic line is connected to the consumer through the second cavity of the heat exchanger 3 and, moreover, before the first stage 1 nompeSums / no j h5ri with (Л

Description

Rmdn

with

ate

; D

SP

WITH

05

its amMocipepD /

pressor communicated with the atmosphere. The output from the first cavity of the heat exchanger 3 is connected to the inlet to the evaporator 6 of the first machine. The outlet of the evaporator 6 is connected to the inlet to the second stage 2 of the compressor. Such a system allows the use of the natural cold of atmospheric air. Cold dry compressed air enters the heat exchanger

one

The invention relates to refrigeration engineering, in particular to systems for the preparation of compressed air, and can be used in compressor installations.

The purpose of the invention is to reduce energy consumption and improve quality; - VA compressed air, as well as the reduction of specific energy consumption. by using the natural cold of atmospheric air.

The drawing shows a diagram of the compressed air preparation system.

The system contains two steps. Air compression 1 and 2, interstage two-cavity heat exchanger 3 and two absorption chillers, including generators 4 and 5 and evaporators 6 and 7. The first absorption refrigeration machine contains generator 5 and evaporator 6, the second is generator 4 and evaporator 7 “First stage inlet” i is connected to the outlet of the evaporator 6 of the first machine, and also via an inlet pipe with the atmosphere. The output of the first stage 1 compressed air through the generator 4 of the second yashina and the heat exchanger 3 is connected with the input of the second stage 2. compress the air. The output of the latter is connected through the generator 5 of the first machine and the evaporator 7 of the second machine with the heat exchanger .3, the output of which is connected to the inlet evaporator b of the first machine, the output of which is connected to the entrance of the second stage, 2 compressed air

The compressed air preparation system works as follows.

3 as a cooling agent, utilizing the compression tag of the first stage of the installation, while increasing its temperature. Then the cold compressed air enters the second stage, into the generator 5 and the evaporator 7, Moisture condensed with terminal cooling, is separated in the evaporator 7, 1 hp, f-ly, 1 sludge.

Under conditions of low temperatures, air is drawn in by the first stage 1 of compression through the pipeline from the atmosphere. In this case, the compression stage operates under economical conditions, since at negative ambient temperatures the atmospheric air has a low moisture content and the specific compression work of the stage is proportional to the absolute temperature of the intake air. The air compressed in the first stage 1 with a temperature of, for example, 160 C enters the generator 4 of the second machine, where the utilization takes place

parts of the heat compressed air. The energy released in generator 4 is used to produce cold by the second machine. The compressed air that has passed the first stage is cooled, goes to the heat exchanger 3, where the second stage is cooled with a stream of cold compressed air, j passed through the end cooling. In this case, in the heat exchanger 3, the moisture contained in the air condenses and separates. Next, the compressed air enters the evaporator 6 of the first machine, where deep cooling is performed with repeated release.

rsh moisture and its separation in the evaporator. The air is then supplied to the second stage 2, squeezing, with the specific energy consumption of stage c3, since it is proportional to -1-1

but the absolute temperature of the intake gas. After the second stage 2 of compression, end cooling of the compressed air is performed. The first stage of end cooling is carried out in the generator 5 of the first machine, where the heat recovery takes place.

-

compress the second stage of the compressor unit. The energy used for this is used to produce cold by the first machine. The second stage of terminal cooling is carried out in the evaporator 7 of the second machine, while the compressed air is cooled to ambient temperature with the separation of moisture from the compressed air and its separation in the vaporized oil, which ensures that condensate does not form in the compressed air pipeline. Next, the cold dry compressed air enters the heat exchanger 3 as a cooling agent, utilizes the heat of compression of the first stage of the compressor unit and increases its temperature, which is equivalent to an increase in the capacity of the installation, and is directed to the consumer,

Under the conditions of hot climate or in the warm season in the temperate zone, the air drawn in by the first stage 1 of compression is pre-cooled in the evaporator 6 of the first machine before; temperature below ambient temperature, which allows separation of moisture contained in the air in the evaporator 6, this significantly reduces the specific work of the compression stage, which depends on the temperature of the intake air. Next, two stages of cooling of the compressed air with utilization of the heat of compression are carried out. in generator 4 and heat exchanger Ze In the latter, air is cooled from below ambient temperature with a stream of compressed air coming from end cooling. After heat exchanger 3, cold This air flows to the second stage 2 of compression and then to the end cooling in the generator 5 and the evaporator 7. At the same time, the compressed air that passed the terminal cooling is cooled below the ambient temperature, which ensures that the moisture in the compressed air pipe does not leak. The moisture that has condensed. With end cooling is separated in an evaporator 7,

VISHPI Order 6141/40. Circulation 476

Random polygons pr-tie, Uzhgorod,. Project, 4

25

59596-4

At an average temperature of atmospheric air, for example 30 ° C, and 100% to ensure conditions

g failure of moisture in the pneumatic network and effective utilization of heat of compression, the working agent must be cooled before the first stage of compression to 2-5 ° C, and before the second stage - to

10 2-10 ° C. After the end cooling before the heat exchanger 3, the compressed air is sufficiently cooled, n, until. 20-30 ° C. The specified working conditions can be provided, for example, when using

15 two absorption refrigerated vans

machines like AFKHA-1000,

Claims (1)

Invention Formula 1, Compressed air preparation system, containing pneumograms 20, communicated at the inlet with the atmosphere, and at the outlet with the compressed air consumer, and installed a two-stage compressor B of the main line j first cavity of the double-cavity heat exchanger, generators and evaporators of two completely hollow .cyl machines, with the generator and icnapuTt - ;. rn. the first machine is installed respectively after the second and before the first compressor stages, and the generator (M5 of the second machine and the first cavity of the heat exchanger after its nepBoii stage, so that reducing the specific value of the current - 3S gas consumption and improving the quality of compressed air; the evaporator second: ma:; 1gny is installed after the first machine generator, and the pneumatic system is connected to the consumer after evaporation of the central machine, through the second cavity of the heat exchanger, 2, The system according to claim 1., About tl and h and icr and so that, in order to remove the specific energy consumption by not using the natural cold of atmospheric air, the pneumatic motor before the first stage of the compressor is additionally reported with the atmosphere, the output from the first cavity is heat - 0 of the exchanger is additionally connected to the inlet to the evaporator of the first ia line, the output of which, in turn, is also connected to the entrance to the second stage of the compressor. thirty Subscription