KR101575965B1 - Refining system for regenerating refrigerant - Google Patents

Abstract

The present invention provides a system for purifying and collecting Freon gas to reduce huge industry loss caused by abruptly stopping operation of freezing and cooling machines due to a ban on using Freon gas, and flexibly cope with the ban on using Freon gas by allowing sufficient time for machine replacement by replacement development. According to an aspect of the present invention, the purification system for recycling a refrigerant comprises: a collection tank to store refrigerant mixed gas containing two or more components including water collected from a freezer, and adjust an internal pressure changing with an inflow or an outflow of the refrigerant mixed gas to a constant level; a water collection filter and an oil separation tank to sequentially filter water and oil contained in the refrigerant mixed gas; an inert gas purification device to adsorb and separate a refrigerant only by passing the filtered refrigerant mixed gas through a purification filter containing activated carbon; a compressor, a heat exchanger, and a condenser sequentially installed to change the adsorbed and separated refrigerant into a liquefied gas; a low pressure separation tank to separate the refrigerant changed into a liquefied gas into a liquefied gas and a gasified gas to discharge the refrigerant while maintaining the refrigerant in a vacuum at zero degrees; an inert gas separation tank to collect the refrigerant separated into a gasified gas and discharged, and induce the refrigerant to liquefy or transfer the refrigerant in a gasified state, which is not liquefied back to the low pressure separation tank; and a service tank to accommodate the refrigerant liquefied through the low pressure separation tank or the inert gas separation tank.

Description

Refining System for Refrigerant Regeneration.

The present invention relates to a regeneration purification system, and more particularly, to a regeneration purification system that separates foreign substances contained in a regeneration refrigerant through a water collecting tank or the like to which a pressure condition of the present invention is applied, And to convert the refrigerant into a low pressure gaseous state.

Known examples of the refrigerator for using the Freon gas as a refrigerant include a compressor and an electric motor integrated with each other. The refrigerator includes a hermetically-closed hermetically sealed container, a semi-hermetic compressor and a semi-hermetically sealed condenser, .

Particularly, the sealed type is mixed with oils and the like that have passed through the cylinder under high temperature and high pressure conditions during the operation due to the mechanical characteristics of the freezer, and sulfurous acid gas is generated due to thermochemical action upon explosion and is mixed with the flour In semi-hermetic type, when oxygen is operated in a vacuum state, oxygen flows into the cylinder finely at the shaft portion (drive shaft, compressor, etc.), and explosion occurs at high temperature and high pressure, and inert gas and heterogeneous material are generated and mixed with freon gas .

In addition, this gas contains various kinds of impurities as it absorbs the inert gas such as oxygen, nitrogen, carbon dioxide, carbon monoxide and sulfur dioxide generated in the refrigerator and water, oxygen and the like in the atmosphere during the recovery of the CFC gas.

If the freon gas mixed with the heterogeneous material recovered from such a freezer is used as it is, the refrigerant function is significantly lowered, and there is a problem of repeating a vicious cycle of mechanical failure and occurrence of a major accident.

Registration Utility Model 1996-0006622 "Regeneration of waste refrigerant gas and automatic charger

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide a refrigeration system capable of reducing a huge industrial loss caused by abrupt stop of the refrigerating machine due to prohibition of use of the CFC, Purification and recovery system.

According to an aspect of the present invention,

A recovery tank for storing a refrigerant mixture gas of two or more components including moisture recovered from the refrigerator and regulating an internal pressure fluctuated by a suction and discharge of the refrigerant mixture gas to a predetermined state;

A moisture collection tank and an oil separation tank for sequentially filtering moisture and oil contained in the refrigerant mixture gas;

An inert gas refining tank for adsorbing and separating only the refrigerant from the filtered refrigerant mixture gas through a refining filter including activated carbon;

A compressor, a heat exchanger, and a condenser sequentially installed to convert the adsorbed and separated refrigerant into a liquefied gas state;

A separate low-pressure tank for separating the refrigerant converted into the liquefied gas state into a liquefied gas state and a gaseous gas state at a temperature of 0 ° C while maintaining a vacuum pressure;

 An inactive gas separation tank for collecting the refrigerant separated and taken out in the gaseous gaseous state to induce liquefaction or transfer the gaseous refrigerant that has not been liquefied to the separated low pressure tank again;

A service tank for receiving the refrigerant liquefied through the separate low-pressure tank or the inert gas separation tank; And a control unit.

Other objects and advantages of the present invention will become apparent from the detailed description given hereinafter and the detailed description and the examples that illustrate the preferred embodiments of the present invention are not intended to limit the scope of the present invention.

According to the refining system for regenerating the refrigerant according to the present invention, there is a risk that high pressure is occasionally applied to the low-temperature freezing point, while passing through the separate low-pressure tank, the inoperative gas separation tank and the service tank for changing the properties of the freon gas, The present invention has the effect of simplifying the problem that the inert gas, the sulfur dioxide gas, the oxygen and the like are separated from the liquefied freon gas by a very elaborate manual operation and removed from the inactive gas separation tank.

Freon gas, which is one example of a refrigerant, is a type of refrigerant that has a property to escape to the atmosphere due to its internal pressure (a property of escaping to the atmosphere by its own pressure) due to the nature of gas and a property that moisture in the air sucks oxygen in recovery, transportation, . Furthermore, when mixed with a heterogeneous mixed material generated by a thermochemical reaction due to high-temperature and high-pressure frictional heat generated during operation of the freezer, the function of the refrigerant is remarkably deteriorated so that it is disposable. Currently, there is no disposal facility It is inevitable to throw it away in the atmosphere. However, purification using the present invention can solve the problem of environmental pollution due to the treatment, the cost problem, and the problem of the machine operation due to the cease of the production of the CFC gas.

1 is an installation state diagram of a refill system for regenerating a refrigerant according to the present invention.
FIG. 2 is a flow chart of a refining process of the refrigerant reforming purification system according to the present invention.

Hereinafter, one preferred embodiment according to the present invention will be described in detail with reference to the accompanying drawings. First, functionally identical or similar portions are given the same reference numerals throughout the drawings.

1 is an installation state diagram of a refill system for regenerating a refrigerant according to the present invention.

The refrigerant applied to the present invention is recovered freon gas or ammonia and is a refrigerant mixture gas of two or more components including water and oil.

Particularly, the refrigerant applied by the temporary example of the present invention is a freon gas, and the present invention will be described based on the freon gas.

The refrigerant mixture gas is recovered through the recovery tank 100 and stored. Particularly, the gaseous refrigerant mixture gas flows from the recovery tank 100 through the water collecting tank 200, the oil separating tank 300, the inert gas refining tank 400, the compressor 500, the heat exchanger 600, the condenser 700 And is stored in the purified tank 1100 when the purified low-pressure tank 800, the inactive gas separation tank 900, and the service tank 1000 are cross-circulated while being refined.

The recovery tank 100 is a device for storing a refrigerant mixture gas of two or more components including moisture recovered from a refrigerator and regulating the internal pressure which varies according to the suction and discharge of the refrigerant mixture gas to a predetermined state.

The refrigerant mixture gas is mixed with an inert gas, a sulfur dioxide gas, oil, moisture, oxygen, flour, etc., and the refrigerant mixture gas stored in the recovery tank 100 is cooled in a vacuum state at a low temperature Stabilized and directed to the lower portion of the recovery tank 100, and the gaseous state gas is confined in the upper part of the recovery tank 100 while being directed upward, and they start to move by a pressure and a vacuum that increase with time.

The suction pressure of the recovery tank 100 according to the present invention is 0.1 MPa or less and the discharge pressure is maintained at 0.9 MPa or less so that it can perform a smooth and accurate refining operation in a stable state, So that complete purification can be achieved.

Such a pressure state is an optimal refining operation system in which the amount injected by the amount taken out from the recovery tank 100 to the water collecting tank 200 and the amount of the injection are constant.

If the balance of the above-mentioned pressure state is broken, the discharge pressure is lowered and the refining efficiency remarkably drops.

Subsequently, the water collecting tank 200 and the oil separating tank 300 sequentially filter the moisture and oil contained in the refrigerant mixture gas being conveyed.

The water collecting tank 200 collects moisture while passing the gaseous gas from the recovery tank 100 through the moisture collection filter 202 of the fine pulp material and transfers the gas to the oil separation tank 300.

In the present invention, in order to improve the accuracy of the moisture trapping filter 202, the moisture sensor 204 is used to exchange the amount of water after a certain amount of moisture is measured. The moisture trapping filter 202 can be reused after drying .

The oil is filtered through the oil separation tank 300 because the oil is mixed in the refrigerant mixture gas in which moisture is filtered through the water collection tank 200.

The oil contained in the gas is separated and adsorbed to the oil separation tank 300 through the oil purification filter 302 using the oil absorption paper as a material.

In addition, an oil temperature sensor 304 is provided in the oil separation tank 300 to check the amount of oil trapped in the oil purification filter 302 to determine a filter replacement cycle.

The inert gas refining tank 400 separates the refrigerant mixture gas filtered in the oil separation tank 300 by adsorbing the refrigerant only through the refining filter including the activated carbon.

Activated carbon which is used as a purification filter material in the inert gas purification tank 400 (a porous material having strong adsorption properties such as coconut, coconut shell, wood, etc., which is obtained by carbonization and then removing hydrocarbon and firing a carbon material) It is adsorbed and purified by a method in which only the refrigerant is adhered to the surface with silica gel or the like.

On the other hand, the limit pressure required for opening and closing the safety valve of the water collecting tank 200, the oil separating tank 300, and the inert gas refining tank 400 is set to 1.5 MPa to prevent an accident caused by pressure rise.

The compressor (500), the heat exchanger (600), and the condenser (700) are sequentially installed to convert the adsorbed and separated refrigerant into a liquefied gas state.

The compressor 500 is a device for compressing gas in the gaseous state to liquefy the gas. The heat exchanger 600 disperses the gas, which is carried by the liquefied gas flowing in the high-temperature heat generated when the compressor 500 performs the compression action And the condenser 700 is a device for condensing the liquefied gas that has passed through the heat exchanger 600 to make it a safe liquefied state gas that is the original state of the refrigerant that is the refrigerant.

When heat dissipation favorable to liquefaction is achieved to some extent, the liquefied gas is safely transferred through the condenser 700 to the separated low-pressure tank 800.

The separation low-pressure tank 800 separates the refrigerant converted into the liquefied gas state into a liquefied gas state and a gaseous gas state while maintaining a vacuum pressure at a temperature of 0 ° C.

The separation low-pressure tank 800 is provided with a cooling purification filter 802, and the position of the cooling purification filter 802 is provided such that an intermediate portion of the separation low-pressure tank 800 is located at an upper portion.

This is because the low-temperature freezing point state is most easily formed in the entire space of the isolated low-pressure tank 800, so that the gas in the gaseous state is easily separated from the gas in the liquid state and the gaseous state.

On the other hand, the level of the separated low-pressure tank 800 is normally operated between 70% and 80%, and stopped at 90% or higher. When the level is above 90%, the pressure in the separation low-pressure tank (800) is connected to the high pressure, which increases the risk of explosion due to pressure rise.

This separate low pressure tank 800 is very important in the present invention and is where the gaseous and liquefied gas separation takes place and on the other hand is where purification of the liquefied gas is taking place, The pressure rises frequently and the internal pressure control is very important due to the high pressure.

That is, it is absolutely required to form an appropriate vacuum pressure to send the gas to the inactive gas separation tank 900 and the service tank 1000, and it is a very important place to regenerate the completely liquefied freon gas at the completion of purification.

Therefore, if the refining operation is stopped when the external temperature is normal temperature, there is a risk of explosion due to an increase in the gas volume in the separation low-pressure tank 800, thereby increasing the pressure. You can be prepared for the situation.

For example, in case of sudden increase in pressure, the solenoid valve is installed in conjunction with the safety valve in case the safety valve can not be operated and the pressure switch is installed. A safety device that controls the pressure by opening a solenoid valve by sending a command signal is very important for ensuring safety in dangerous gas operation and can prevent accidents by various applications.

 This solenoid valve is operated to operate in conjunction with the pressure switch, so that when the pressure inside the tank rises above a certain value, the pressure switch will open the solenoid valve to open when the safety valve does not operate. If emergency measures are necessary, safety can be secured.

The inactive gas separation tank 900 collects the refrigerant separated and taken out in the gaseous gaseous state and induces liquefaction or transfers the gaseous refrigerant that has not been liquefied to the separation low-pressure tank 800 again.

The gaseous gas collected in the inactive gas separation tank 900 is liquefied through a gaseous gas film formed therein to induce liquefaction by making a low temperature state in which the freezing point is low.

 In the present invention, the low-temperature state in which the freezing point is low means that the gas in the tank is restrained and stabilized by suppressing the elasticity and denaturation of the material, and then an unstable substance trapped in the upper portion, such as inert gas and sulfur dioxide, , Which is not always fixed but must be set at a suitable low temperature every time it changes depending on the gas condition.

In addition, a certain amount (usually about 10% of the tank capacity) is kept for liquefaction, and a portion over 10% is directed to the separation low-pressure tank 800 through a sensor valve that is automatically opened and closed, The inert gas and the sulfur dioxide gas are filtered using a very fine pressure difference while moving these gases out.

If the pressure in the inactive gas separation tank 900 rises and exceeds 1.9 MPa, the pressure is adjusted through an opening / closing action of the safety valve in an emergency.

The liquefied gas state separated from the separate low-pressure tank 800 is injected into the service tank 1000 through the cooling and purifying filter 802 toward the lower portion of the tank, and the gaseous-state gas flows upwardly, The gas is transferred to the inactive gas separation tank 900 and injected.

The gas in the liquefied state directed downward is stabilized in a low-temperature vacuum state and is injected into the service tank 1000 via the lower part of the separation low-pressure tank 800 and stays there. The inert gas, the sulfur dioxide, The gas in the gaseous state remains trapped toward the upper portion due to inherent gas properties (freezing under the effect of low temperature), and is returned to the inert gas separation tank 900 using the pressure difference through the relief valve.

On the other hand, if the refining operation is continued, inert gas and sulfur dioxide which are not refined in the separation low-pressure tank 800 are gathered in the service tank 1000 although they are extremely small amounts of nitrogen and oxygen. And is moved to the separation tank 900 so that the purification operation can be continued to complete the purification.

In the present invention, the inert gas, the sulfur dioxide gas, the oxygen and the like are moved and discharged from the inert gas separation tank 900, and then the separated low-pressure tank 800, the inert gas separation tank 900, the service tank 1000, The pressure of the back pressure should be equalized immediately to maintain the stable state. If the time for maintaining the pressure equal to the pressure is low, the discharge pressure is lowered and the refining efficiency is lowered.

In addition, the critical pressure required for opening and closing the safety side of the separation low-pressure tank 800, the inoperative gas separation tank 900, and the service tank 1000 is set to 1.9 MPa to prevent an accident caused by a rise in pressure.

The refrigerant mixture gas is purified through the above process, and the purified refrigerant mixture gas is stored in the purified tank 1100.

Next, the refining process of the refrigerant refining system according to the present invention will be described.

FIG. 2 is a flow chart of a refining process of the refrigerant purifying system for purification according to the present invention.

First, the present invention is subjected to a water-oil separation and purification process (S100). That is, the process of stably refining the water from the water collecting tank 200 to the inactive gas refining tank 400 at a relatively small pressure, and selecting each refining filter material so that the basic process of the refining process can be faithfully performed. To improve the accuracy of the tablet.

Particularly, the limit pressure at which the safety valve of each of the tanks 200, 300, and 400 is opened and closed is 1.5 MPa. Since the increase in the internal pressure with respect to the external temperature change is not so large, The operation is also smooth, so check the condition of each filter and it will be very good if you exchange it.

The liquefaction and gas separation process S200 is a process of passing through the compressor 500, the heat exchanger 600, the condenser 700, the separation low-pressure tank 800, the inert gas separation tank 900, and the service tank 1000 They are the process of maintaining a steady state and continuing to refine.

The present invention may be embodied in many other forms without departing from the spirit or essential characteristics thereof. Therefore, the above-described embodiments are merely examples in all respects, and should not be construed restrictively. The scope of the present invention is indicated by the appended claims, and the present invention is not restricted by the specification. Modifications and variations falling within the scope of the appended claims all fall within the scope of the present invention.

100: Recovery tank 200: Moisture collection tank
300: Oil separation tank 400: Inert gas purification tank
500: compressor 600: heat exchanger
700: condenser 800: separation low-pressure tank
900: Inert gas separation tank 1000: Service tank
1100: Refined tank

Claims (3)

A recovery tank for storing a refrigerant mixture gas of two or more components including moisture recovered from the refrigerator and regulating the internal pressure fluctuated by the suction and discharge of the refrigerant mixture gas to a predetermined state;
A moisture collection tank and an oil separation tank for sequentially filtering moisture and oil contained in the refrigerant mixture gas;
An inert gas refining tank for adsorbing and separating only the refrigerant from the filtered refrigerant mixture gas through a refining filter including activated carbon;
A compressor, a heat exchanger, and a condenser sequentially installed to convert the adsorbed and separated refrigerant into a liquefied gas state;
A separate low-pressure tank for separating the refrigerant converted into the liquefied gas state into a liquefied gas state and a gaseous gas state at a temperature of 0 ° C while maintaining a vacuum pressure;
An inactive gas separation tank for collecting the refrigerant separated and taken out in the gaseous gaseous state to induce liquefaction or transfer the gaseous refrigerant that has not been liquefied to the separated low pressure tank again;
A service tank for receiving the refrigerant liquefied through the separate low-pressure tank or the inert gas separation tank; And the refrigerant is supplied to the refrigerant recovery system.
The method according to claim 1,
Wherein the moisture collection tank is provided with a moisture sensor and a moisture collection filter, and the oil separation tank is provided with an oil purification filter.
The method according to claim 1,
Wherein the limiting pressure for opening and closing the safety side of the water collecting tank, the oil separating tank and the inert gas refining tank is set to 1.5 MPa, and the separating low-pressure tank, the inoperative gas separating tank, Is set to 1.9 MPa.

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