JPH01121663A - Absorption chiller and its operating method - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an absorption refrigerating machine in which a corrosion protective film is preliminarily formed on the surface of main structural members, and a method of operating the same.

[Conventional technology]

A closed circulation absorption refrigerator uses a concentrated LiBr aqueous solution as an absorption liquid and water as a refrigerant. Generally, since absorption refrigerators are operated at high temperatures, the absorption liquid becomes highly concentrated and is highly corrosive to metal members. For this reason, inhibitors are added to the absorption liquid to prevent corrosion.

Conventional absorption refrigerating machines include a high temperature regenerator, a low temperature regenerator, a condenser, an evaporator, an absorber, a heat exchanger,
The high-temperature regenerator was equipped with supply and return piping for concentrated absorption liquid and dilute absorption liquid, respectively, as an absorption liquid circulation system.

[Problem that the invention seeks to solve]

The above-mentioned conventional technology does not take into consideration the operation of the high-temperature regenerator alone in an absorption refrigerator, and there is a problem in that it is difficult to form a corrosion protective film in advance on the highly corroded inner wall of the high-temperature regenerator.

An object of the present invention is to provide a highly corrosion-resistant absorption refrigerating machine that can be operated only in high-temperature regenerators with severe corrosion conditions, since a protective film can be formed by operating the refrigerator in advance.

[Means for solving problems]

The above purpose is to connect the absorbent recirculation system to the high temperature regenerator.

This is achieved by providing a refrigerant supply line.

[Effect]

When the high-temperature regenerator is operated alone, the absorption liquid recirculation line of the high-temperature regenerator circulates and flows the absorbed liquid to be heated and concentrated, and the absorption liquid recirculates the high-temperature regenerator and associated piping. Forms a corrosion protective film on surfaces that come into contact with liquid.

The absorption liquid is concentrated by the operation of the high-temperature regenerator, and the water vapor is separated.
The absorption liquid concentration in the high-temperature regenerator is maintained constant by supplying it again to the high-temperature regenerator. 6 [Example] Hereinafter, an example of the present invention will be described with reference to the drawings.

The absorption liquid 6 is heated and concentrated in the high-temperature regenerator 1a to produce water vapor 1
Separate 4. The steam 14 passes through the heat exchanger of the low temperature regenerator 1b, heats and concentrates the dilute solution 6b, and enters the condenser 2.
Here, it is cooled by the cooling water 15 and becomes water. This water becomes the refrigerant 11. The refrigerant 11 is force-fed to the evaporator 3 by the refrigerant pump 8b and is sprayed onto the evaporator tube 9. The sprayed refrigerant 11 evaporates and becomes water vapor again because the inside of the evaporator is maintained at a reduced pressure of several mHg. The latent heat of evaporation at this time cools the cold water 10 passing through the evaporation tube 9 and is used for air conditioning. The water vapor of the evaporated refrigerant 11 enters the absorber 4, where the concentrated liquid 6a concentrated in the high temperature regenerator 1a is dispersed and absorbed therein. Concentrated liquid 6a
generates heat when absorbing water vapor, but this is caused by the cooling pipe 12
It is cooled by the cooling water 13 passing through it and becomes a diluted liquid 6b. The diluted liquid 6b is sent by the pump 8a, passes through the heat exchanger 5, and returns to the high temperature regenerator 1a and the low temperature regenerator 1b.

During normal operation, the recirculation piping 16 of the high-temperature regenerator is not used with the valve 17b closed. When the high-temperature regenerator 1a is operated alone to form a corrosion protection film on the inner wall,
Valves 17a and 17c are closed, and then valve 17b is opened to circulate the absorption liquid 6 using recirculation piping 16. At this time, the water vapor 14 generated is returned to water in the condenser 2 and used as the refrigerant 11. This refrigerant 11 is transferred to the refrigerant supply pipe 18
, open the valve 17b and supply it to the high temperature regenerator la. This keeps the concentration of the absorbent in the high temperature regenerator la constant and forms a corrosion protective film on the inner wall of the high temperature regenerator 1a.

〔Effect of the invention〕

According to the present invention, since a corrosion protective film can be formed by operating only the high temperature regenerator under the most severe corrosion conditions in advance, an absorption refrigerator with high corrosion resistance can be obtained.

[Brief explanation of the drawing]

The figure is a system diagram of an absorption refrigerator according to an embodiment of the present invention. 1... Regenerator, 2... Condenser, 3... Evaporator, 4
...Absorber, 5...Heat exchanger, 6...Absorption liquid, 8
... pump, 11 ... refrigerant, 16 ... absorption liquid recirculation system piping, 17 ... valve, 18 ... refrigerant supply piping.

Claims (1)

[Claims] 1. Circulating the absorption liquid in the regenerator using a recirculation system,
Preliminarily operating only the regenerator while supplying the refrigerant in an amount commensurate with the evaporation amount of the absorption liquid from the refrigerant supply line,
Absorption refrigeration, characterized in that after forming a corrosion protection film on the surface of the iron-based structural member in contact with the absorption liquid, the recirculation system path and the refrigerant supply system path are closed to perform a predetermined operation. How to operate the machine. 2. In an absorption refrigerator whose main components include a regenerator, a condenser, an evaporator, an absorber, and a heat exchanger, and which is filled with an absorption liquid mainly consisting of an aqueous lithium bromide solution, the regenerator is filled with the absorption liquid. An absorption chiller characterized by having a recirculation system path and a refrigerant supply system path.