CN2495363Y

CN2495363Y - Apparatus for purifying and drying pressed air

Info

Publication number: CN2495363Y
Application number: CN 01210737
Authority: CN
Inventors: 李平
Original assignee: HANYE AIR SOURCE PURIFYING EQUIPMENT CO Ltd HENGZHOU
Current assignee: HANYE AIR SOURCE PURIFYING EQUIPMENT CO Ltd HENGZHOU
Priority date: 2001-02-26
Filing date: 2001-02-26
Publication date: 2002-06-19
Anticipated expiration: 2011-02-26

Abstract

An equipment for purifying and drying compressed air includes a freeze drying component, an absorbing drying component and a connecting pipe, which are mounted in s shell body. The freeze drying component comprises a precooler, an evaporator, a separating filter, an automatic drainer, a compressor, a condenser, a drying filter, an expansion valve, a bypass valve and a gas-liquid separator and the absorbing drying component comprises an absorbing tube which is controlled by a switching valve to work alternatively, a regeneration gas control valve, a check valve and a throttle orifice. The equipment has a compact structure, low cost, long service life and makes little noise, the compressed air purified and dried by which has a good quality and the amount of the energy consumed by which is only 1/3 of that consumed by the prior equipment.

Description

Compressed-air actuated purge drying device

The utility model relates to a kind of compressed-air actuated equipment of purge drying that is used for.It can remove moisture, dust, impurity in the compressed air, and the deterioration machine oil of bringing in the air compressor machine compression process, corrosion thing etc., thereby makes compressed air can be widely used as the power source of senior spraying, chemical fibre dyeing, the contour technological requirement of pneumatic instrument.

Chinese patent 92238580.7 disclosed purification of compressed air drying devices, include freeze drying assembly and adsorption dry assembly in its housing, wherein the freeze drying assembly contains forecooler, evaporimeter, automatic water trap, compressor, condenser, expansion valve, bypass valve, moisture trap, the used heat warmer, filter, the adsorption dry assembly contains two absorbing cylinders of being done alternation by transfer valve control, the regeneration gas control valve, check-valves, restricting orifice, and before the air inlet of absorbed type drying assembly, connected an accurate filter that cost is higher; The shortcoming of existing this device is: 1) needn't be up to 0.01 μ because of the used compressed air precision of the overwhelming majority's user, therefore this device is for this part user, accurate filter becomes unnecessary, and its existence can increase the cost of this device on the contrary, and makes structure numerous and jumbled; Even there is the user of only a few to need the compressed air of precision up to 0.01 μ, then also can on the outlet pipe of this purge drying device, accurate filter be installed, its effect is identical, and easily; 2) the used heat warmer that it had, also because the required regeneration tolerance of activation processing adsorbent only accounts for 2～3% of total tolerance, even and this regeneration gas does not heat, its dried dew point also can reach-40 ℃～-70 ℃, so it is unnecessary that it also becomes, otherwise also make complex structure, and waste energy; 3) its filter and moisture trap all are arranged on separately in the pipeline, also be cause that structure is disperseed, one of numerous and jumbled reason; 4) noise during this device busy is bigger.

The purpose of this utility model is to overcome the shortcoming that exists in the above-mentioned prior art, a kind of compressed-air actuated purge drying device is provided, so that it have compact conformation rationally, low cost of manufacture, long service life, and characteristics such as working stability effective and efficient reliable, purge drying is high, energy consumption is few.

The compressed-air actuated purge drying device of the utility model, it includes freeze drying assembly, the adsorption dry assembly of installing in housing, and connecting line, be characterized in that the freeze drying assembly contains forecooler, evaporimeter, separator-filter, automatic water trap, compressor, condenser, device for drying and filtering, expansion valve, bypass valve, gas-liquid separator, the adsorption dry assembly contains two absorbing cylinder, regeneration gas control valve, check-valves, the restricting orifices of being done alternation by transfer valve control.

The compressed-air actuated purge drying device of the utility model, it also can have silencer, the noise that produces during with minimizing work.

The work of the compressed-air actuated purge drying device of the utility model, comprise two aspects: at first make compressed air enter the freeze drying assembly, to realize compressed-air actuated freeze drying, making its pressure leak source is 2～5 ℃, oil-containing≤5ppm, dust-laden≤3 μ, and moisture, the mist of oil impurity of about 90% in it are eliminated, temperature is lowered; And then the compressed air of this freeze drying introduced the adsorption dry assembly, after adsorption dry, thoroughly finish compressed-air actuated purge drying.Its process is as follows: the thick gas of high temperature compressed air that compressor produces enters evaporimeter behind condenser, device for drying and filtering, expansion valve, its temperature is reduced to 0 ℃, then through separator-filter draining and elimination dust impurity, under the control of transfer valve, alternately enter in two absorbing cylinders again, by the activated alumina in the tube moisture in this gas is carried out brute force absorption, realizes purifying, meanwhile, dried compressed air after sub-fraction purifies is gone into another absorbing cylinder from its outlet by-pass flow, and the activated alumina in the tube is carried out regeneration activating; The drying of two absorbing cylinders, regeneration activating are handled when finishing when setting-up time, and transfer valve exchanges their work; Alternately working of two absorbing cylinders can be realized compressed-air actuated further drying and prolonged service life of activated alumina in the absorbing cylinder, thereby guaranteed carrying out continuously of compressed air purge drying process.

The utility model has the advantages that: after 1) in the purification equipment for drying of air compression, having removed the accurate filter, used heat warmer of 0.01 μ and filter and moisture trap being merged into separator-filter, make the compact conformation of this device reasonable, manufacturing cost reduces greatly; 2) the utility model when improving GAS QUALITY, greatly reduces energy consumption reducing dew point (reaching below-70 ℃), compares with the device with treating capacity of the prior art, and the utility model device energy consumption only is 1/3rd of an existing apparatus; 3) after the utility model device has been installed silencer, reduced the noise sound pollution of environment widely, improved condition of work.

To and contrast accompanying drawing by embodiment below, the utility model will be further described below.Accompanying drawing thes contents are as follows:

Fig. 1 is the structure diagram of the inside whole assembly of the compressed-air actuated purge drying device of the utility model after having removed housing;

Fig. 2 is that the structure of the freeze drying assembly in the compressed-air actuated purge drying device of the utility model is amplified sketch;

Fig. 3 is that the structure of the adsorption dry assembly in the compressed-air actuated purge drying device of the utility model is amplified sketch;

From Fig. 1, can see the compressed-air actuated purge drying device of the utility model, it contains freeze drying assembly, the adsorption dry assembly of installing in housing (all being omitted) in all figure, and one group can be with assembly by setting the connecting line that requirement is linked to be an integral body; Wherein the freeze drying assembly also can be seen from Fig. 2, and it contains forecooler 10, evaporimeter 11, separator-filter 12, automatic water trap 13, compressor 14, condenser 15, device for drying and filtering 16, expansion valve 17, bypass valve 18, gas-liquid separator 19; The purge drying device also can see from Fig. 3, and it contains two and makes absorbing cylinder 3a, 3b, regeneration gas control valve 6, check-valves 7, the restricting orifice 8 of alternation and air inlet pipe 1 and escape pipe 2 by transfer valve 5 controls.

The course of work of the compressed-air actuated purge drying device of the utility model is as follows: the thick gas of high temperature compressed air that compressor 14 produces enters evaporimeter 11 behind condenser 15, device for drying and filtering 16, expansion valve 17, compressed air with the drying to be clean of coming out in the forecooler 10 carries out heat exchange, and its temperature is reduced to 0 ℃; Through separator-filter 19 drainings and elimination dust impurity, realize the freeze drying of the thick gas of compressed air then, at this moment its pressure leak source is more than 2 ℃, and moisture, oil and the dust of about 90% in it are removed, but power consumption is very little and stable, fault is few; After this, gas after the freeze drying enters from air inlet pipe 1, and under the control of transfer valve 5, alternately enter among two absorbing cylinder 3a, the 3b one, for example enter absorbing cylinder 3a, in this, the moisture in the gas is carried out brute force absorption, realizes purge drying by activated alumina, meanwhile, the dried compressed air after part purifies is gone into another absorbing cylinder 3b from its outlet by-pass flow, and the activated alumina in the tube is carried out regeneration activating; Drying, regeneration activating in two absorbing cylinder 3a, the 3b are handled when reaching setting-up time, and transfer valve exchanges their work, that is carries out in the absorbing cylinder 3b carrying out activation processing in drying, the absorbing cylinder 3a; The alternately property ground work of two absorbing cylinders can realize compressed-air actuated adsorption dry, and both prolong the service life of absorbing cylinder activated alumina, and compressed air purge drying process can be carried out continuously.Purge drying compressed air confess continuously from escape pipe 2.

Purge drying compressed air come out from the adsorption dry assembly after, also can it be introduced forecooler 10, evaporimeter 11 successively by pipeline, carry out heat exchange with the thick gas of compressed air of drying to be clean, so that after reclaiming its cold, outwards confess again.In addition, 2～3% of its total tolerance will be drawn the attached dry component of resorption again, be used for the activated alumina in regeneration activating absorbing cylinder 3a or the 3b.

The utility model also can fix a silencer 9 on the air inlet pipeline of adsorption dry assembly, to reduce noise sound.

Claims

1, a kind of compressed-air actuated purge drying device, it includes the freeze drying assembly of installing in housing, the adsorption dry assembly, and connecting line, it is characterized in that the freeze drying assembly contains forecooler (10), evaporimeter (11), separator-filter (12), automatic water trap (13), compressor (14), condenser (15), device for drying and filtering (16), expansion valve (17), bypass valve (18), gas-liquid separator (19), adsorption dry assembly contain two absorbing cylinder (3a that done alternation by transfer valve control, 3b), regeneration gas control valve (6), check-valves (7), restricting orifice (8).

2, compressed-air actuated purge drying device as claimed in claim 1 is characterized in that: silencer (9) is housed on the said adsorption dry assembly.