CN106693624B

CN106693624B - Precooling evaporator for freezing type air dryer

Info

Publication number: CN106693624B
Application number: CN201510451896.XA
Authority: CN
Inventors: 江道兴
Original assignee: Chizhou Hannuowei Electromechanical Device Technology Co ltd
Current assignee: Chizhou Hannuowei Electromechanical Device Technology Co ltd
Priority date: 2015-07-24
Filing date: 2015-07-24
Publication date: 2023-05-12
Anticipated expiration: 2035-07-24
Also published as: CN106693624A

Abstract

The invention relates to a precooling evaporator for a freezing type air dryer, which comprises an air inlet (1), an air outlet (2), a precooling heat return area (3), an evaporation area (4) and an air return pipe (5), wherein the precooling heat return area (3) is connected with the evaporation area (4) in series, an air drainage pipe (31) for guiding the flow of humid air is arranged in the precooling heat return area (3), a refrigerant drainage pipe (43) for guiding the flow of a refrigerant is arranged in the evaporation area (4), a gas-water separator (34) is arranged at the tail part of the precooling heat return area (3), and a gas-water separator (45) is arranged at the tail part of the evaporation area (4). The precooling heat regenerator and the evaporator are integrally designed, so that the structure is compact; the serial connection mode enables air to flow more smoothly; the precooling heat return area and the evaporator are provided with independent gas-water separators, condensed water is separated in time, and the integral condensed water separation rate is improved.

Description

Precooling evaporator for freezing type air dryer

Technical Field

The invention relates to an evaporator, in particular to a precooling evaporator for a freezing type air dryer.

Background

The freezing type compressed air dryer is a compressed air dewatering and purifying device manufactured by utilizing a freezing principle, after compressed air containing a large amount of saturated water vapor from an upstream pipeline network is cooled, most of the water vapor is condensed into liquid water drops, and the liquid water drops are separated by gas and water and then discharged, so that the obtained dry compressed air can meet most of industrial requirements.

The pre-chill regenerator and evaporator are important components of a refrigerated compressed air dryer. At present, most precooling regenerators and evaporators of refrigeration type compressed air dryers are split, so that the connection and installation difficulties of pipelines are increased, and the whole structure is not compact. The compressed air generally flows out of the evaporator and then enters the gas-water separator, so that the moisture of the pre-cooled compressed air cannot be effectively separated, the load of the gas-water separator is increased, and the separation efficiency is reduced.

Disclosure of Invention

The technical problem to be solved by the invention is to provide a precooling evaporator for a freezing type air dryer, which solves the problems.

In order to solve the technical problems, the technical scheme of the invention is as follows:

a pre-chilled evaporator for a chilled air dryer, comprising: the device comprises an air inlet, an air outlet, a precooling heat return area, an evaporation area and an air return pipe, wherein the precooling heat return area is connected with the evaporation area in series, an air drainage pipe for guiding the flow of humid air is arranged in the precooling heat return area, a refrigerant drainage pipe for guiding the flow of a refrigerant is arranged in the evaporation area, the two ends of the refrigerant drainage pipe are provided with a refrigerant inlet and a refrigerant outlet, a gas-water separator is respectively arranged at the tail parts of the precooling heat return area and the evaporator, and an automatic drainage valve is arranged below the gas-water separator.

And two ends of the air drainage tube in the precooling and backheating area are respectively provided with an air baffle plate to prevent air from flowing into the external space of the air drainage tube.

An air drainage baffle is respectively arranged in the precooling heat return area and the evaporator.

The precooling heat regenerator and the evaporator are integrally designed, so that the structure is compact; the serial connection mode enables air to flow more smoothly; the precooling heat return area and the evaporator are provided with independent gas-water separators, condensed water is separated in time, and the integral condensed water separation rate is improved.

Drawings

Fig. 1 is a schematic structural view of the present invention.

Detailed Description

The invention will be described in further detail with reference to the drawings and the detailed description.

The saturated water content of the compressed air is temperature dependent and as the temperature decreases, the water content also decreases. Assuming a pressure of 0.7Mpa and a temperature of 40 c before entering the dryer, the water content per kg is about 5.7874 g; the temperature was lowered to 3℃and the water content of the compressed air was about 0.5899/Kg. About 5.1984 g of water vapor condenses into water when one kg of compressed air drops from 40 ℃ to 3 ℃. The freezing type compressed air dryer is used for cooling the compressed air to about 3 ℃, and the cooled condensed water is discharged through an automatic drain valve, so that the water content of the compressed air is greatly reduced.

The invention relates to a precooling evaporator for a freezing type air dryer, which is shown in figure 1 and comprises an air inlet 1, an air outlet 2, a precooling heat return area 3, an evaporation area 4 and an air return pipe 5, wherein the precooling heat return area 3 is connected with the evaporation area 4 in series, an air drainage pipe 31 for guiding the flow of moist air is arranged in the precooling heat return area 3, a refrigerant drainage pipe 43 for guiding the flow of a refrigerant is arranged in the evaporation area 4, a refrigerant inlet 41 and a refrigerant outlet 42 are arranged at two ends of the refrigerant drainage pipe 43, a gas-water separator 34 is arranged at the tail part of the precooling heat return area 3, an automatic drainage valve 35 is arranged below the gas-water separator 34, a gas-water separator 45 is arranged at the tail part of the evaporation area 4, and an automatic drainage valve 46 is arranged below the gas-water separator 45.

The two ends of the air draft tube 31 in the pre-cooling heat return area 3 are respectively provided with an air baffle 32 to prevent air from flowing into the external space of the air draft tube 31.

An air drainage baffle 33 is arranged in the precooling heat return area 3, and an air drainage baffle 44 is arranged in the evaporation area 4.

The moist air enters the precooling and heat-returning area 3 from the air inlet 1, and under the action of the air baffle 32, the moist air can only flow out of the precooling and heat-returning area 3 through the air drainage tube 31, part of condensed water is separated through the air-water separator 34, is discharged from the automatic drainage valve 35, and then enters the evaporation area 4. The refrigerant drainage tube 43 in the evaporation area 4 is filled with refrigerant, wherein the refrigerant flows in from the refrigerant inlet 41 of the evaporation area 4 and flows out from the refrigerant outlet 42, so that the air entering the evaporation area 4 flows up and down alternately under the action of the air drainage partition plate 44, the contact area with the refrigerant is increased, and the cooling efficiency is improved. The moisture in the air is cooled to condensed water, and enters the gas-water separator 45 along with the air, and the condensed water is separated and discharged from the automatic drain valve 46. The dried air returns to the pre-cooling heat returning area 3 through the air return pipe 5, and the dried air does not enter the air drainage pipe 31 under the action of the air baffle 32, and then flows up and down alternately under the action of the air drainage partition 33 in the outer space of the air drainage pipe 31, and is discharged from the air outlet 2. The dry air alternately flows up and down in the outer space of the air draft tube 31, and can serve to cool the humid air in the air draft tube 31.

The above description is only of specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that do not undergo the inventive work should be covered in the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope defined by the claims.

Claims

1. A pre-chilled evaporator for a chilled air dryer, comprising: including air inlet (1), air outlet (2), precooling back-to-heat area (3), evaporation zone (4), air return pipe (5), precooling back-to-heat area (3) and evaporation zone (4) serial connection, precooling back-to-heat area (3) inside has air drainage tube (31) of guide moist air flow direction, evaporation zone (4) inside has refrigerant drainage tube (43) of guide refrigerant flow, refrigerant drainage tube (43) both ends are refrigerant inlet (41) and refrigerant export (42), precooling back-to-heat area (3) afterbody installation gas-water separator (34), automatic drain valve (35) are installed to gas-water separator (34) below, evaporation zone (4) afterbody installation gas-water separator (45), automatic drain valve (46) are installed to gas-water separator (45) below, the both ends of air drainage tube (31) respectively are equipped with an air baffle (32) in precooling back-to-heat area (3), prevent that air from flowing into the outer space of air drainage tube (31), be equipped with air drainage baffle (33) in precooling back-to-heat area (3), be equipped with air drainage baffle (44) in evaporation zone (4).