JP2010054133A - Multistage absorption type absorption chiller and heater - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve a problem wherein conventionally, since a multistage absorption type absorption chiller and heater is reassembled at the installation site by welding work, this causes a risk of fire due to sparks during the welding work and requires a large facility for the welding work and skilled welding technical staff to respond to the requirement for achieving high air tightness. <P>SOLUTION: A first evaporator and a first absorber is stored in the same shell and a second evaporator and a second absorber are stored in the same shell. Both the shells and the evaporators and absorbers etc. stored in both the shells are constituted to be dividable into a plurality of portions in the longitudinal direction. Around the divided end faces of the shells, flanges having elastic seal members and fixation means arranged thereon are formed, and the flanges are fixed by the fixation means so as to be dividable. The evaporators and absorbers stored in the shells, respectively are communicated with each other by pipe line means having flange joints. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  This is a technology related to the structure of a multi-stage absorption type absorption chiller / heater.

Conventionally, a large absorption chiller / heater that cannot be accommodated in an elevator is installed using a crane or the like before the building that houses the absorption chiller / heater is completed. When the absorption chiller / heater was renewed due to aging, etc., the building walls and floor were broken and carried in, but the absorption chiller / heater was replaced by an elevator etc. for the purpose of eliminating the inconvenience. There has been known a technique of dividing into blocks of a size that can be accommodated and carrying them to the installation site, and then welding and assembling the blocks (see Patent Document 1).
Dividing into blocks that can be carried in this way, and the method of assembling the blocks by welding at the installation site is a technology that has already been performed even in the multistage absorption type absorption chiller / heater, although the division direction is not the longitudinal direction. (See Patent Document 2).
JP 2001-124438 A JP 2006-207896 A

In the prior art as shown in Patent Documents 1 and 2, since welding is performed at the time of assembly at the installation site, there is a risk of fire due to sparks during welding, and large-scale equipment is required. However, since high airtightness is required, there are problems such as securing skilled engineers.
Further, even in a multistage absorption type absorption chiller / heater as shown in Patent Document 2, when the dividing direction is not the longitudinal direction, the same problem occurs when the elevator is housed.

  The present invention has been made in order to solve the above-described problems, and can be easily assembled without performing welding at the time of assembly at the installation site, and has a high sealing performance and has a high sealing performance. The purpose is to provide.

Regenerator, condenser, first and second evaporators, first and second absorbers, heat exchanger, solution pump, refrigerant pump, pipe connecting each of the predetermined devices, the predetermined through the pipe Multistage absorption type absorption comprising a refrigerant circulating in equipment, an absorbing solution that absorbs the refrigerant, the regenerator, condenser, first and second evaporators, first and second absorbers, etc. In the cold water heater
The first evaporator and the first absorber are housed in the same shell, the second evaporator and the second absorber are housed in the same shell, and both the shells, the evaporators, the absorbers, and the like housed in both shells are A flange portion in which an elastic seal member and a fixing means are disposed is formed around the split end face of the shell, and the shell is opposed to the split end face by the fixing means. The other flange and the other flange are fixed in a severable manner, and the evaporators and the absorbers housed in the respective shells communicate with each other through a pipe means having a flange joint. .

As described above, the shell containing the regenerator, condenser, evaporator, absorber, etc. is configured to be divided into a plurality of parts in the longitudinal direction, and when installing the shell, the divided shell is carried into the installation site, Since welding is not used when assembling, there is no risk of fire, and there is an effect that it can be easily assembled without requiring extensive equipment and skilled technicians.
Furthermore, store the evaporator and absorber that require the lowest pressure during operation and require high sealing performance in the same shell, and store the low-temperature regenerator and condenser that do not require high sealing performance in the same shell. As a result, the effect of minimizing the length of the seal portion that must have high sealing performance can be obtained.

As an embodiment of the present invention, a two-stage absorption double effect absorption refrigerator will be described as an example with reference to FIGS.
1 is a schematic diagram of the configuration of a two-stage absorption double-effect absorption refrigerator, FIG. 2 is a partial front view of the two-stage absorption double-effect absorption refrigerator, and FIG. 3A is III-III in FIG. FIG. 3B is a cross-sectional view perpendicular to the longitudinal direction of the shell containing the low-temperature regenerator and the condenser, and FIG. 3C is a cross-sectional view perpendicular to the longitudinal direction of the shell containing the high-temperature regenerator. 4 is a partially enlarged view of FIG. 3A, and FIG. 5 is a VV arrow view of FIG.

First, the structure of a two-stage absorption double-effect absorption refrigerator will be described with reference to FIG.
The two-stage absorption double-effect absorption refrigerator includes a high-temperature regenerator 2 having a boiler 1, a low-temperature regenerator 3, a condenser 4, a first evaporator 5, a first eliminator 6, a first absorber 7, a second The evaporator 8, the second eliminator 9, the second absorber 10, the refrigerant pump 11, the solution pump 12, the low temperature heat exchanger 13, the high temperature heat exchanger 14, and pipelines that connect the predetermined devices. ing.

Next, the operation of each device will be described.
The high-temperature regenerator 2 heats an absorption solution that absorbs a refrigerant such as lithium bromide in the high-temperature regenerator 2 with the combustion heat of the boiler 1 to generate refrigerant vapor such as water. Hereinafter referred to as a “concentrated absorbent solution”).
The low-temperature regenerator 3 has a heating tube group 3A, and the refrigerant solution from the high-temperature regenerator 2 flowing into the heating tube group 3A heats the absorbing solution in the low-temperature regenerator 3 to generate refrigerant vapor. A thick absorbent solution is produced.

The condenser 4 has a cooling water pipe group 4A, and the refrigerant vapor generated in the low temperature regenerator 3 and flowing into the condenser 4 is cooled and liquefied by cooling water passing through the cooling water pipe group 4A.
The first evaporator 5 has a chilled water tube group 5A and a distribution header 5B. The refrigerant liquid liquefied by the condenser 4 is distributed from the distribution header 5B to the chilled water tube group 5A to evaporate the refrigerant liquid, and the chilled water tube group 5A. Cools by taking the latent heat of vaporization from the cold water passing through.
The first absorber 7 introduces the refrigerant vapor evaporated in the first evaporator 5 through the first eliminator 6, and distributes the refrigerant vapor from the distribution header 7B to the cooling water pipe group 7A. Absorbed in the concentrated absorbent solution of the regenerator 3, an absorbent solution with an increased refrigerant content (hereinafter referred to as “intermediate concentration absorbent solution”) is generated.

The second evaporator 8 distributes the refrigerant liquid passed through the first evaporator 5 from the distribution header 8B to the cold water pipe group 8A to evaporate the refrigerant liquid, and takes the latent heat of vaporization from the cold water passing through the cold water pipe group 8A. Cooling.
The second absorber 10 introduces the refrigerant vapor evaporated in the second evaporator 8 through the eliminator 9, and this refrigerant vapor is introduced from the first absorber 7 to the cooling water pipe group 10 </ b> A from the distribution header 10 </ b> B. Absorbed in the intermediate concentration absorbing solution to be distributed, an absorbing solution with a higher refrigerant content (hereinafter referred to as “dilute absorbing solution”) is produced.

The refrigerant pump 11 sucks the refrigerant liquid in the bottom liquid reservoir of the second evaporator 8 and distributes it to the cold water pipe group 5 </ b> A of the first evaporator 5.
The solution pump 12 sucks the absorbing solution in the bottom reservoir of the second absorber 10, distributes it to the cooling water tube group 7 </ b> A of the first absorber 7, and sends it to the low temperature regenerator 3 and the high temperature regenerator 2.
The low-temperature heat exchanger 13 and the high-temperature heat exchanger 14 return to the absorber 7 from the low-temperature regenerator 3 and the high-temperature regenerator 2, the diluted absorbent solution (temperature is low) sent to the low-temperature regenerator 3 and the high-temperature regenerator 2 by the solution pump 12. Heat exchange with concentrated absorbent solution (temperature is high).

  The low-temperature regenerator 3 and the condenser 4 are in the shell 15, the first evaporator 5 and the first absorber 7 are in the shell 16, the second evaporator 8 and the second absorber 10 are in the shell 17, The high-temperature regenerator 2 is individually stored in the shell.

The structure of the shell 16 and the shell 17 will be described with reference to FIGS. 2 and 3A.
As shown in FIG. 3 (A), which is a cross-sectional view taken along line III-III showing the splittable surface of FIG. 2, the shell 16 and the shell 17 have a substantially rectangular shape in the longitudinal direction, Flange 16 </ b> A, 16 </ b> B and flanges 17 </ b> A, 17 </ b> B extending outward are formed on the peripheral surfaces of the shell 16 and the shell 17.
The flanges 16A and 16B and the flanges 17A and 17B are provided with through-holes 23 for fixing the flanges 16A and 16B and the flanges 17A and 17B with bolts and nuts, and the flanges 16A and 16B. , And one of the opposing flange surfaces of the flanges 17A and 17B (here, referred to as the flange 16B and the flange 17B) has an elastic opening surrounding the shell 16 and the shell 17, as shown in FIG. A circumferential groove 18 into which the ring 19 is inserted is provided.

Moreover, the shell 16 and the shell 17 are arranged side by side in the vertical direction, and both communicate with each other through a pipe line 20 having flange joints at a plurality of locations.
As shown in FIG. 5, the pipe line 20 having the flange joint is formed with a flange extending outwardly surrounding the pipe peripheral surface. A through hole 23 for fixing the flange with bolts and nuts is provided, and one of the opposing flange surfaces (here, referred to as flange 20A) of the flange surrounds the pipe line 20 and is elastic. A circumferential groove 21 is provided in which an O-ring 22 having a diameter is inserted.

3B and 3C will be described.
FIG. 3B is a cross-sectional view in which the shell 15 that houses the low-temperature regenerator 3 and the condenser 4 is divided by a separable surface in the longitudinal direction, and has a substantially quadrangular shape in the longitudinal direction. A flange extending outward is formed on the peripheral surface of the shell 15.
Further, the flange is provided with a through-hole for fixing both flanges formed facing the split surface with bolts and nuts, and one of the facing flange surfaces (here) The flange 15B is provided with a circumferential groove 18 into which the elastic O-ring 19 is inserted so as to surround the shell 15.

FIG. 3C is a cross-sectional view in which the shell housing the high-temperature regenerator 2 is divided by a separable surface in the longitudinal direction, and has a substantially quadrangular shape in the longitudinal direction. An outwardly extending flange is formed on the circumferential surface of the shell.
Further, the flange is provided with a through hole for fixing both flanges formed to face the dividing surface with bolts and nuts, and either one of the flange surfaces facing the flange has a through hole. A circumferential groove 18 for inserting the elastic O-ring 19 is provided so as to surround the shell.
The elastic O-rings 19 and 22 may be made of metal such as copper, brass or aluminum which is softer and more elastic than the flanges 15A, 16A, 17A and 20A, in addition to rubber.

  According to the above embodiment, when the shell 11 containing the low-temperature regenerator 3, the condenser 4, the evaporator 5, and the absorber 7 is divided and brought into the installation site and assembled, the flange surface provided with the elastic seal member Are fixed with bolts and nuts so that they can be fixed easily, and unlike welding, there is an effect that there is no danger of a fire due to sparks and large-scale equipment is unnecessary.

  In addition, since the evaporator and absorber, which have the lowest pressure during operation and require high sealing performance, are housed in the same shell, the effect of minimizing the length of the seal location that must have high sealing performance Play.

It is a structure schematic diagram of a two-stage absorption type dual effect absorption refrigerator. It is a partial front view of a two-stage absorption type dual effect absorption refrigerator. FIG. 3 is a view taken along the line III-III in FIG. 2. It is sectional drawing orthogonal to the longitudinal direction of the shell which accommodates a low-temperature regenerator and a condenser. It is sectional drawing orthogonal to the longitudinal direction of the shell which accommodates a high temperature regenerator. FIG. 4 is a partially enlarged view of FIG. 3. It is a VV arrow figure of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Boiler 2 High temperature regenerator 3 Low temperature regenerator 3A Heating pipe group 4 Condenser 4A Cooling water pipe group 5 1st evaporator 5A Cold water pipe group 5B Spread header 6 First eliminator 7 First absorber 7A Cooling pipe group 7B Spread header 8 Second evaporator 8A Cold water tube group 8B Spread header 9 Second eliminator 10 Second absorber 10A Cooling water tube group 10B Spread header 11 Refrigerant pump 12 Solution pump 13 Low temperature heat exchanger 14 High temperature heat exchanger 15 Shell 16 Shell 16A Flange 16B Flange 17 Shell 17A Flange 17B Flange 18 Circulating groove 19 O-ring 20 Pipe line 20A Flange 21 Circulating groove 22 O-ring 23 Through hole

Claims (3)

Regenerator, condenser, first and second evaporators, first and second absorbers, heat exchanger, solution pump, refrigerant pump, pipe connecting each of the predetermined devices, the predetermined through the pipe Multistage absorption type absorption comprising a refrigerant circulating in equipment, an absorbing solution that absorbs the refrigerant, the regenerator, condenser, first and second evaporators, first and second absorbers, etc. In the cold water heater
The first evaporator and the first absorber are housed in the same shell, the second evaporator and the second absorber are housed in the same shell, and both the shells, the evaporators, the absorbers, and the like housed in both shells are A flange is formed around the split end surface of the shell, and an elastic seal member and a fixing means are disposed around the split end surface of the shell. A multistage absorption in which the flange and the other flange are fixed in a severable manner, and the evaporators and absorbers housed in the shells are communicated with each other via a pipe means having a flange joint. Type absorption cold / hot water machine. A high-temperature regenerator, a low-temperature regenerator, a condenser, first and second evaporators, first and second absorbers, a heat exchanger, a solution pump, a refrigerant pump, a pipe line connecting the predetermined devices, Refrigerant that circulates through the predetermined device through a pipeline, and an absorbing solution that absorbs the refrigerant, the high-temperature regenerator, the low-temperature regenerator, the condenser, the first and second evaporators, the first and second absorbers, and the like In a multistage absorption type absorption chiller / heater equipped with a shell for storing
The high temperature regenerator is the first shell, the low temperature regenerator and the condenser are the second shell, the first evaporator and the first absorber are the third shell, and the second evaporator and the second absorber are the fourth shell. And at least the third to fourth shells and the evaporators and absorbers housed in the third to fourth shells of the first shell to the fourth shell can be divided into a plurality of parts in the longitudinal direction. A flange in which an elastic seal member and a fixing means are disposed is formed around the split end surface of the shell, and one flange and the other flange facing each other at the split end surface are formed by the fixing means. Is a multi-stage absorption type absorption chiller / heater, in which the evaporators and the absorbers, which are housed in the respective shells, are connected to each other by pipe means having flange joints.   The first evaporator and the first absorber housed in the same shell are arranged in the shell in a state of being aligned in the horizontal direction, and are similarly housed in the same shell. The absorber is also arranged in the shell in a state of being aligned in the horizontal direction, and the shell containing the second evaporator and the second absorber is arranged below the shell containing the first evaporator and the first absorber. The multistage absorption type absorption chiller / heater according to claim 1 or 2.

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