JPS6148065B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an exhaust gas absorption refrigerator, and by combining an exhaust gas vacuum boiler, the absorption refrigerator and the exhaust gas vacuum boiler are used to recover the thermal energy of the exhaust gas, thereby obtaining a large refrigerating capacity. purpose.

When heat is recovered in two stages from exhaust gas discharged from a factory or the like using an absorption refrigerator, there is a method of arranging two exhaust gas recovery generators.

However, once the heat is recovered, the temperature of the exhaust gas decreases, and the generator that then recovers the heat requires many heat transfer surfaces, resulting in a larger shape and an increase in the amount of absorption liquid, which has the disadvantage of increasing costs. Ta.

The present invention has been made to solve the above-mentioned drawbacks, and an embodiment shown in the drawings will be described below. 1
is a hot water generator that uses hot water produced using exhaust gas as a heat source to heat and separate refrigerant from dilute absorption liquid.
2 is a high-temperature generator that heats and separates the refrigerant from the primary intermediate absorption liquid using exhaust gas as a heat source, and 3 uses the refrigerant vapor separated by the high-temperature generator 2 as a heat source to reheat the secondary intermediate absorption liquid and further heat and separate the refrigerant. low temperature generators; 4 and 5 are condensers that cool and condense the refrigerant flowing from the hot water generator 1, high temperature generator 2, and low temperature generator 3, respectively, in coolers 6 and 7; 8 is a condenser for both of the above condensers; An evaporator that obtains cold water for air conditioning from a water cooler 9 by utilizing the latent heat when the liquid refrigerant from the containers 4 and 5 is dispersed and vaporized;
By successively heating and separating the refrigerant in steps 2 and 3 and dispersing the concentrated concentrated absorption liquid to absorb the refrigerant vapor inside the vessel, the inside of the evaporator 8 can be maintained at a low pressure and a continuous supply of cold water can be performed. The absorbers 11 and 12 are a low-temperature heat exchanger and a high-temperature heat exchanger, and these include a refrigerant vapor pipe 13, a refrigerant liquid downflow pipe 14, 15,
A refrigerant circulation path 17 having a refrigerant pump 16, a dilute absorption liquid line 19 having an absorption liquid pump 18, a primary intermediate absorption liquid line 21 having an intermediate absorption liquid pump 20,
A secondary intermediate absorption liquid pipe line 22 and a concentrated absorption liquid pipe line 23 are connected to form an absorption refrigeration cycle.

Reference numeral 24 denotes an exhaust gas vacuum boiler installed in the exhaust gas path 25 after heating the high temperature generator 2, and hot water produced by the boiler passes through a hot water circuit 27 having a hot water circulation pump 26 to the hot water generator. 1.

Next, the operation will be explained.

First, the exhaust gas is heat-recovered by the high-temperature generator 2, and its temperature is lowered.Then, the exhaust gas enters the exhaust-gas vacuum boiler 24, where the heat is recovered. The hot water generator 1 is heated by the hot water taken out from the exhaust gas vacuum boiler 24 to separate the refrigerant from the dilute absorption liquid, and the high temperature generator 2 and the low temperature generator 3 are heated by the exhaust gas and refrigerant vapor to generate primary and secondary Each refrigerant is separated from the intermediate absorption liquid. These refrigerants are liquefied in condensers 4 and 5 and then transferred to an evaporator 8.
is dispersed and vaporized.

Cold water is obtained from the water cooler 9 by the heat of vaporization at this time. On the other hand, the refrigerant is sequentially separated and concentrated in the generators 1, 2, and 3, and the concentrated absorption liquid is distributed to the absorber 10 to absorb the vaporized refrigerant and become a dilute absorption liquid.

Note that the cooling water first flows to the absorber 10 and the condenser 4 of the hot water generator 1, and then to the condenser 5 adjacent to the low temperature generator 3.

As described above, the exhaust gas absorption refrigerator according to the present invention includes a high-temperature generator that uses exhaust gas as a heating source, a low-temperature generator that uses refrigerant vapor separated by the generator as a heating source, a condenser, an evaporator, an absorber, and a low-temperature heat generator. A refrigeration cycle is constructed by connecting the exchanger and the high-temperature heat exchanger with piping, and a hot water generator whose heat source is hot water heated by an exhaust gas vacuum boiler is provided in the solution circulation path from the absorber to the high-temperature generator. Because it is,
Thermal energy contained in exhaust gas can be effectively recovered and a large refrigerating capacity can be obtained in the exhaust gas absorption refrigerator.

It is also possible to supply hot water for hot water heating or reheating from the exhaust gas vacuum boiler.

[Brief explanation of the drawing]

The drawing is a circuit diagram of an exhaust gas absorption refrigerator according to the present invention. 1...Hot water generator, 2...High temperature generator, 3...
...Low temperature generator, 10...Absorber, 24...Exhaust gas vacuum boiler, 27...Hot water circuit.

Claims (1)

[Claims] 1. A high-temperature generator using exhaust gas as a heating source, a low-temperature generator using refrigerant vapor separated by the generator as a heating source, a condenser, an evaporator, and an absorber. A refrigeration cycle is constructed by connecting a low-temperature heat exchanger and a high-temperature heat exchanger with piping, and a hot water generator uses hot water heated by an exhaust gas vacuum boiler as a heat source in a solution circulation path from the absorber to a high-temperature generator. An exhaust gas absorption refrigerating machine characterized by being provided with. 2. The condenser described in paragraph 1 liquefies the refrigerant while cooling it from the low-temperature generator and the high-temperature generator, and the refrigerant from the hot water generator is cooled by cooling water at a lower temperature than the cooling water flowing into the condenser. An exhaust gas absorption refrigerator consists of a condenser that liquefies the refrigerant.