JPH07120110A - Automatic bleeder for absorption chilled or warm water machine/refrigerator - Google Patents

Abstract

PURPOSE:To provide a cyclone system by combining an ejector and a vertical cylindrical casing and to reduce in size an automatic bleeder. CONSTITUTION:An automatic bleeder bleeds noncondensable gas in an absorber together with refrigerant vapor, separates the bled refrigerant vapor from the gas while absorbing to absorbent liquid and exhausts the separated gas by a bleed pump, and comprises a nozzle 88 for introducing the liquid and injecting it, a suction chamber 90 for feeding the gas and the vapor in the absorber to a periphery of the nozzle 88, and an ejector 84 communicating with the nozzle 88 and the chamber and having a diffuser 92 provided in an ejecting direction of the nozzle 88. The bleeder further comprises a casing 86 in which the ejector 84 is so mounted that the injecting direction of the ejector 84 is directed in a tangential direction of an inner wall of the casing 86, a noncondensable gas outlet provided at a top of the casing 86, and an absorbent liquid outlet provided at a lower part of the casing 86.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for automatically extracting and discharging non-condensable gas in an absorption refrigerator or an absorption chiller-heater, and more specifically, an automatic cyclone system in which an ejector and a vertical cylindrical casing are combined. It relates to an extraction device.

[0002]

2. Description of the Related Art Conventionally, an absorption chiller-heater using, for example, lithium bromide as an absorbent and water as a refrigerant is generally known. The conventional absorption chiller-heater has, for example, a configuration as shown in FIG. Reference numeral 1 denotes an upper low temperature cylinder, which is composed of a low temperature regenerator 2 and a condenser 3, and a refrigerant reservoir 4 is provided in the lower portion of the condenser 3. Reference numeral 5 denotes a lower cold cylinder, which is composed of an evaporator 6 and an absorber 7. 8 is a high temperature regenerator, which is a combustion chamber 9, a heat recovery device 10, a gas-liquid separator 1.
1, an exhaust stack 12 and a combustion device 13. In addition, the low temperature heat exchanger 14, the high temperature heat exchanger 15 and the like are constituent devices. The dilute liquid in the lower liquid pool 16 in the absorber 7 is
Pipes 18, 19 by the low-temperature pump 17, low-temperature heat exchanger 1
4, sent to the low temperature regenerator 2 via the pipe 20. This dilute liquid is heated by the high-temperature refrigerant vapor flowing from the pipe 21 and concentrated to an intermediate concentration.

The liquid having this intermediate concentration is divided into two. One of the two halves of the liquid is supplied by the high temperature pump 22 to the pipe lines 23, 24,
It is sent to the high temperature regenerator 8 via the high temperature heat exchanger 15 and the pipe 25. The intermediate concentration liquid is heated by the combustion device 13, rises in the heat recovery device 10, enters the gas-liquid separator 11, and is separated into a refrigerant vapor and a concentrated liquid. This concentrated liquid is a high temperature regenerator 8
Due to the pressure difference between the internal pressure of approximately 650 mmHg and the internal pressure of the lower low temperature cylinder 5 of approximately 6 mmHg, the concentrated liquid pipe line 26 and the high temperature heat exchanger 1
5. After passing through the pipe line 27, it is mixed with the intermediate liquid (the other of the two divided liquids) from the pipe line 28 which has been previously branched, and becomes a mixed concentrated liquid and enters the low temperature heat exchanger 14, and the pipe line 29 is passed. The passing spraying device 30 sprays the heat transfer tubes of the absorber 7 to form the liquid pool 1
The circulation returning to 6 is made.

On the other hand, the refrigerant vapor separated in the gas-liquid separator 11 enters the low temperature regenerator 2 via the pipe 21, heats the liquid to condense and liquefy, and then enters the condenser 3 from the pipe 46. Further, in the low temperature regenerator 2, the refrigerant vapor generated when the dilute liquid is concentrated to the intermediate concentration liquid enters the condenser 3 from the upper space and is condensed to become the refrigerant liquid. These condensed refrigerant waters are
It enters the evaporator 6 through the pipe line 31, and is stored in the lower pool 32. This refrigerant water is supplied to the pipelines 34 and 3 by the refrigerant pump 33.
After 5, the spraying device 36 sprays the heat on the heat transfer tubes of the evaporator 6.

Cold water to be used for cooling enters the evaporator 6 from the pipe 37, is cooled by the latent heat of vaporization of the dropping refrigerant, and flows out from the pipe 38. The cooling water is supplied to the pipes 39, 40,
After passing through 41, it flows out and the absorption heat in the absorber 7 and the condensation heat in the condenser 3 are taken away and taken out of the system. Further, by opening the cooling / heating switching valve 48 and further stopping the cooling water supplied to the pipeline 39, hot water can be obtained from the pipeline 38.
As shown in FIG. 6, the conventional low temperature regenerator 2 cools the refrigerant vapor generated in the high temperature regenerator 8 with the dilute solution flowing out from the absorber 7 to form the refrigerant liquid and at the same time heat the dilute solution. It was common to regenerate the refrigerant liquid by increasing the solution concentration.

In the above absorption chiller / heater, an automatic bleeder 50 is provided to discharge the non-condensable gases such as N ₂ , O ₂ and H ₂ accumulated in the system. This automatic bleeding device 50 uses the non-condensable gas in the absorber 7 together with the refrigerant vapor,
The extraction liquid is extracted into the extraction chamber 54 via the extraction pipe 52, while the absorption liquid is supplied to the extraction chamber 54 via the absorption liquid pipe 56, and the gas is absorbed together with the absorption liquid by the ejector action of the absorption liquid. It is made to flow into the gas-liquid separator 60 via 58. At this time, the refrigerant vapor is absorbed by the absorbing liquid.

The absorption liquid separated by the gas-liquid separator 60 is circulated to the absorber 7 through the absorption liquid pipe 62, while the non-condensed gas is guided to the collection chamber 66 through the non-condensed gas pipe 64. Get burned. 68 is a partition member. The non-condensable gas in the collection chamber 66 is discharged to the atmosphere by the extraction pump 74 via the extraction pipe 72 equipped with the extraction electromagnetic valve 70. H in the non-condensed gas
₂ may be released to the atmosphere via an extraction pipe 80 equipped with an extraction electromagnetic valve 76 and a palladium cell 78.

[0008]

In the conventional automatic bleeding apparatus 50 shown in FIG. 6, the absorption liquid absorbs the refrigerant vapor in the gas extracted from the absorber 7, and the non-condensed gas and the absorption liquid are separated from each other. In order to perform separation (gas-liquid separation) using the head, it is necessary to make the absorbing liquid / non-condensing gas pipe 58 a long pipe in the vertical direction. Further, a large amount of solution (absorption liquid) circulation amount is required for gas-liquid separation. For this reason,
There has been a problem that the height of the automatic bleeding apparatus becomes high and the automatic bleeding apparatus becomes large in size, and requires a large space for installation.

The present invention has been made in view of the above points,
It is an object of the present invention to provide an automatic bleeding device which is downsized and space-saving by combining an ejector and a vertical cylindrical casing into a cyclone system.

[0010]

In order to achieve the above-mentioned object, an automatic bleeder for an absorption chiller-heater / refrigerator of the present invention uses a non-condensable gas in the absorber of the absorption chiller-heater / refrigerator. Bleed with the refrigerant vapor, while absorbing the extracted refrigerant vapor with the absorbing liquid and separating it from the non-condensing gas, the separated non-condensing gas is discharged by a bleeding pump in an automatic bleeding device, introducing the absorbing liquid. A nozzle that ejects, a suction chamber that is provided around the nozzle so that the non-condensable gas and the refrigerant vapor in the absorber flow in, and a diffuser that is connected to the nozzle and the suction chamber and that is provided in the nozzle ejection direction. And a vertical cylindrical casing to which the ejector is attached so that the ejecting direction of the ejector faces the tangential direction of the inner wall of the vertical cylindrical casing, and the vertical cylindrical casing. A noncondensable gas outlet provided in the upper part, is characterized by comprising the absorbent liquid outlet provided at a lower portion of the vertical-type cylindrical casing.

In the above automatic bleeder, the center line in the ejecting direction of the ejector and the horizontal center line of the vertical cylindrical casing make an angle of 0 to 10 degrees upward or downward, preferably 1 to 4 °. It is preferable to configure as follows. The gas-liquid mixed fluid ejected into the casing creates a free-rotating liquid surface by the rotating centrifugal force, the central part is low, the liquid level rises outside, the non-condensed gas is centrifugally separated into the upper part and the solution into the lower part. However, in this case, as described above, by forming an angle in the mounting direction of the ejector, the gas and liquid can be separated more efficiently. Even if the angle is 0 °, that is, the ejector ejecting direction is horizontal, the efficiency is sufficiently exhibited, but it is preferable that the angle is 10 ° or less, preferably 1 to 4 °. If the angle exceeds 10 °, the difference between the central portion and the outer side of the freely rotating liquid surface becomes too large, which is not preferable. The ejection direction of the ejector can be either downward or upward from the horizontal direction, but downward direction is preferable because the gas-liquid contact efficiency is high.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described in detail below with reference to the drawings. However, the shape of the constituent members described in this embodiment, the relative arrangement, and the like, unless otherwise specified, are not intended to limit the scope of the present invention to only those, but merely illustrative examples. Nothing more. Example 1 FIG. 1 shows a state in which an automatic bleeder 82 of the present invention is incorporated in an absorption chiller-heater. 2 shows an enlarged view of the automatic air extraction device 82, and FIG. 3 shows a cross section taken along the line AA in FIG. The automatic bleeder 82 of this embodiment is provided with an ejector 84.
And a vertical cylindrical casing 86.

The ejector 84 stores the absorbing liquid in the absorbing liquid pipe 56.
A nozzle 88 that is introduced and jetted through
The non-condensable gas and refrigerant vapor in the absorber are drawn around the extraction pipe 5
The suction chamber 90 is provided so as to flow in through the nozzle 2, and the diffuser 92 is provided in the ejection direction of the nozzle 88. Reference numeral 93 is an absorbent inlet, and 95 is a gas inlet. Then, as shown in FIG. 3, the ejector 84 is attached to the casing 86 such that the ejecting direction of the ejector 84 faces the tangential direction of the inner wall of the vertical cylindrical casing 86. Moreover, as shown in FIG.
A non-condensable gas outlet 94 is provided in the upper part of 6, and an absorbing liquid outlet 96 is provided in the lower part of the casing 86. Other configurations are similar to those in the case of FIG.

Next, the operation of this embodiment will be described. As shown in FIGS. 1 and 3, the absorbing liquid from the absorber 7 (for example, the dilute liquid on the discharge side of the low temperature pump 17) is supplied to the absorbing liquid inlet 93 at one end of the nozzle 88 via the absorbing liquid pipe 56. , Is ejected from the other end of the nozzle 88. The non-condensable gas and the refrigerant vapor in the absorber 7 are sucked into the suction chamber 90 from the periphery of the nozzle 88 through the extraction pipe 52 from the periphery of the nozzle 88 and are jetted tangentially into the casing 86 from the periphery of the nozzle 88. It As shown in FIG. 2, the gas-liquid mixed fluid ejected into the casing 86 forms a free-rotating liquid surface 98 due to its rotational centrifugal force, and the central portion of the liquid surface 98 is low and becomes high toward the outer periphery. Therefore, the refrigerant vapor is efficiently absorbed by the absorbing liquid, and the noncondensable gas is centrifugally separated into the upper part of the liquid and the solution into the lower part of the liquid. The separated non-condensable gas is exhausted by the extraction pump (vacuum pump) 74 through the non-condensed gas outlet 94. The hydrogen in the non-condensed gas may be separated and exhausted by the palladium cell 78.

Embodiment 2 In this embodiment, as shown in FIG. 4, the angle θ formed by the center line 100 of the ejector 84 in the jet direction and the horizontal center line 102 of the casing 86 is 0 to 10 degrees. Desirably, the angle is set to 1 to 4 degrees, and the ejection direction of the ejector 84 is configured to incline obliquely downward. In this embodiment, since the gas-liquid mixed fluid is jetted obliquely downward, the difference in height between the central portion and the outer portion of the freely rotating liquid surface becomes large,
The gas-liquid separation efficiency is further improved. Other configurations are similar to those in the first embodiment.

Embodiment 3 In this embodiment, as shown in FIG. 5, the ejecting direction of the ejector 84 is inclined obliquely upward.
Other configurations are the same as those in the second embodiment.

[0017]

Since the present invention is configured as described above, it has the following effects. (1) Since the ejector is tangentially connected to the vertical cylindrical casing to form a cyclone system, a freely rotating liquid surface is formed by the rotating centrifugal force, the non-condensed gas is in the center of the liquid, and the solution is in the liquid. Centrifugal separation in the lower part enables efficient gas-liquid separation. (2) Therefore, unlike the conventional case, a long pipe is not required for gas-liquid separation and the amount of solution circulation is reduced, so that the apparatus can be downsized and the space can be saved. (3) When the ejector is provided at an angle of 0 to 10 degrees with respect to the horizontal direction, the effects of the above (1) and (2) can be further exerted.

[Brief description of drawings]

FIG. 1 is a flow sheet showing an embodiment of an absorption chiller-heater incorporating the automatic bleeder of the present invention.

FIG. 2 is a partially cutaway enlarged front view of the automatic air extraction device in FIG.

3 is a cross-sectional view taken along the line AA in FIG.

FIG. 4 is a partially cutaway front view showing another embodiment of the automatic air extraction device of the present invention.

FIG. 5 is a partially cutaway front view showing still another embodiment of the automatic air extraction device of the present invention.

FIG. 6 is a flow sheet showing an example of a conventional absorption chiller-heater incorporating a conventional automatic air extraction device.

[Explanation of symbols]

7 Absorber 52 Extraction pipe 56 Absorption liquid pipe 62 Absorption liquid pipe 74 Extraction pump 78 Palladium cell 82 Automatic extraction device 84 Ejector 86 Vertical cylindrical casing 88 Nozzle 90 Suction chamber 92 Diffuser 93 Absorption liquid inlet 94 Non-condensed gas outlet 95 Gas inlet 96 Absorbing liquid outlet 98 Liquid level 100 Center line in ejector ejection direction 102 Center line in casing horizontal direction θ Angle formed by center line in ejector ejection direction and casing center direction

Claims (2)

[Claims] 1. A non-condensable gas in an absorber of an absorption chiller / heater / refrigerator is extracted together with a refrigerant vapor, and the extracted refrigerant vapor is absorbed by an absorbing liquid and separated from the non-condensed gas. In an automatic bleeder that exhausts condensed gas with a bleeding pump, a nozzle that introduces and ejects an absorbing liquid, and a suction that is provided around this nozzle so that the non-condensing gas and refrigerant vapor in the absorber flow in And an ejector that is in communication with the nozzle and the suction chamber and that is provided in the ejection direction of the nozzle, and an ejector so that the ejection direction of the ejector is tangential to the inner wall of the vertical cylindrical casing. Vertical cylindrical casing to which is attached, non-condensable gas outlet provided in the upper part of the vertical cylindrical casing, and absorption liquid outlet provided in the lower part of the vertical cylindrical casing. The automatic bleed system of the absorption chiller-refrigerator characterized by comprising the. 2. The ejecting direction center line of the ejector and the horizontal center line of the vertical cylindrical casing form an angle of 0 to 10 degrees upward or downward. Automatic bleeder for absorption chiller / heater / refrigerator.