JP2007085592A - Regenerative condenser - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To increase the overall heat exchanging coefficient by increasing local heat transfer coefficients of a falling absorbent film side and a heat source fluid side of a vertical heat transfer tube, reduce a volume of a device and improve regenerating performance. <P>SOLUTION: This regenerative condenser is provided with the plurality of heat transfer tubes 1 between upper and lower partitioning plates 7, 8 of a vertical body 1A, an absorbent pool 2 and an absorbent storing chamber 13 are formed on an upper portion and a lower portion of the heat transfer tubes 1, and the condensable heat source fluid 41 is supplied to a heating chamber 6 formed by the heat transfer tubes 1 and the body 1A, so that the falling liquid film-shaped absorbent 40a requiring regeneration is heated to be regenerated. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a regenerative condensing device (hereinafter referred to as a regenerative condensing device) for an absorption refrigerator and an absorption chiller / heater, and in particular, a falling absorption liquid film side flowing down to an inner wall side and an outer wall side of a vertical heat transfer tube; The present invention relates to a novel improvement for increasing the overall heat exchange coefficient due to the high local heat transfer coefficient on the side of the condensable heat source fluid, reducing the volume of the apparatus, and improving the absorption liquid regeneration capability.

Regarding conventional double- and triple-effect absorption refrigerators and absorption chiller / heaters, low and medium temperature regenerators have a technology in which the absorbent is regenerated by heating the refrigerant vapor from a higher temperature regeneration temperature stage, and The high temperature regenerator has a technique in which the absorbent is regenerated by heating high temperature steam from a boiler. In such a regenerator section, a pool heating method is generally adopted for regeneration of the absorbing liquid.
FIG. 14 shows a conventional regenerator pool heating system. That is, as shown in the figure, the pool heating method is characterized in that the regenerator heat transfer tube 1 is immersed in the absorption liquid pool 2 of the regenerator body 1A, and the high-temperature steam or refrigerant vapor 3 is placed in the heat transfer tube 1. The absorption liquid in the absorption liquid pool 2 outside the tube is heated and regenerated.

Since the conventional regenerative condensing device for absorption refrigerators is configured as described above, the following problems exist.
In other words, the absorption refrigerator is an aggregate of heat exchangers, and the heat exchange system of the regenerator part greatly affects the heat energy utilization efficiency.
In particular, the pool heating type regenerator has the following drawbacks.
(1) The liquid side local heat transfer coefficient in the pool is relatively small.
(2) General-purpose absorbent lithium bromide solution has a relatively high specific gravity and a relatively high viscosity. Therefore, the influence of the liquid level difference on the heat transfer outside the tube is large. That is, the larger the liquid level difference, the lower the heating capacity for the absorbing liquid.
(3) Since a horizontal heat transfer tube is used, the local heat transfer coefficient is often inferior due to the flow of condensate in the tube.
(4) Therefore, the heat transfer area required for the regenerator part heat exchanger is large, and the required materials are large.

  A regenerative condensing apparatus according to the present invention includes a plurality of heat transfer tubes supported by an upper partition plate and a lower partition plate that are spaced apart from each other at an upper portion and a lower portion of a vertically arranged body, and formed on the upper portion of the upper partition plate. And an absorption liquid pool for supplying the regenerative absorption liquid to each of the heat transfer tubes, and a heat source fluid introduction section formed between the upper partition plate and the lower partition plate for introducing and deriving a condensable heat source fluid And a heating chamber having a condensate outlet, a gas-liquid separation chamber and an absorption liquid storage chamber formed below the lower partition plate, and an entry prevention device provided inside the body of the gas-liquid separation chamber; The absorption liquid film flowing down the inner wall side of each heat transfer tube is regenerated by heating the condensable heat source fluid supplied to the outer wall side of each heat transfer tube, and the heat transfer tube , Composed of copper-based material or cupro-nickel material, and before A sprayer disposed above the absorption liquid pool and formed in a ring shape; and a plurality of liquid holes formed in a lower surface of the sprayer; The cooling liquid is supplied to the absorption liquid pool, and a falling liquid distributor is provided at the upper part of the heat transfer tube. The cylindrical part of the falling liquid distributor has a collar part and a lower part of the collar part. A support portion provided; a blending portion provided below the flange; and a gap channel provided below the blending portion; and provided on the outer surface of the body. The generated refrigerant vapor outlet section is provided with the anti-entrance device having a first eliminator, and a collision type splash separation device is provided at the center of the absorbing liquid distribution chamber at the upper portion of the fuselage. A flow guide plate and a second eliminator are provided in the collision type splash separation device. The flow guide plate is positioned below the sprayer and an annular gap channel is formed between the periphery of the flow guide plate and the body, and each eliminator is positioned above the sprayer, In the annular gap channel, the regeneration-requiring absorbent is allowed to flow down, and each heat transfer tube passes through the upper partition plate and the lower partition plate, and each heat transfer tube and each partition plate is The condensate storage chamber is provided in communication with a condensate passage formed on the outer surface of the body, and the condensate storage chamber is provided with the condensate outlet. It is the composition which is.

Since the regeneration condensing apparatus according to the present invention is configured as described above, the following effects can be obtained.
That is, the present invention has a function of an unprecedented absorption cold heat generating regenerator, and is not only affected by the liquid level in the absorption liquid heating, but also locally on the falling absorption liquid film side and the condensable heat source fluid side. By increasing the overall heat exchange coefficient due to the high heat transfer coefficient, it is possible to reduce the volume and improve the regeneration capacity of the absorption-type cold heat generation required apparatus.

  The present invention increases the overall heat exchange coefficient by reducing both the local heat transfer coefficient on the falling absorption liquid film side and the condensable heat source fluid side in the vertical heat transfer tube, thereby reducing the volume of the apparatus and improving the regeneration capacity. An object of the present invention is to provide a regenerative condensing apparatus that can obtain the above.

Hereinafter, preferred embodiments of a regeneration condensing apparatus according to the present invention will be described with reference to the drawings.
In addition, the same code | symbol is attached | subjected and demonstrated to a part the same as that of a prior art example, or an equivalent part.
1 to 3, each of them is distributed in a film form as an absorbing liquid film 40 in which the absorbing liquid flows down on the inner wall surface of the heat transfer tube 1, and a condensable heat source fluid 41 such as high-temperature steam or A state of heating the absorption liquid film 40 by flowing a refrigerant vapor and the temperature distribution of the absorption liquid film 40 and the condensable heat source fluid 41 are shown. As shown in the figure, the absorption liquid film 40 is heated, and the refrigerant component evaporates from the absorption liquid film 40. Such a temperature of the absorbing liquid film 40 changes to some extent due to a concentration change in the absorbing liquid film 40 due to refrigerant evaporation. Further, the condensable heat source fluid 41 condenses by radiating heat to the outer wall surface of the tube, and the condensate 41a flows down to the outer wall surface of the heat transfer tube 1 in the form of droplets or films. Moreover, the condensation heat dissipation is performed isothermally. Therefore, heat exchange by evaporation of the refrigerant component from the absorbing liquid film 40 and condensation of the condensable heat source fluid 41 can be performed under a relatively small temperature difference, for example, a temperature difference of several degrees Celsius.

FIGS. 4 to 8 show the condensing heat source fluid 41, for example, the configuration of the regeneration condensing method and apparatus applied to the heating of the high-temperature water vapor or the refrigerant vapor over the heating process, the structure of the sprayer 3, and the structure of the falling liquid distributor 4. Explain.
As shown in FIG. 4, the regeneration condensing apparatus 100 of the present invention distributes the regeneration-requiring absorbent (or dilute absorbent) on one side wall surface of the heat transfer tube 1 as shown in FIG. A condition in which the condensable heat source fluid 41 is provided from the other wall side flow path of the heat transfer tube 1 and heated through the wall of the heat transfer tube 1 so that the refrigerant in the absorbing liquid film 40 is not affected by the liquid level difference. Evaporating below, the absorbent liquid film 40 is regenerated to regenerate the absorbent liquid 40b, and basically the absorbent liquid distribution formed by dividing the vertical cylindrical body 1A by the upper partition plate 7 and the lower partition plate 8 The chamber 20 has a heating chamber 6 and a gas-liquid separation chamber 12.

  The absorbing liquid distribution chamber 20 is formed by a space between the upper part of the body 1A and the upper partition plate 7, and the absorbing liquid introducing portion 21 and the regeneration-requiring absorbing liquid 40a are placed around the tube bundle of each heat transfer tube 1. The sprayer 3 for spraying, the absorption liquid pool 2, and the regeneration-required absorption liquid 40a are distributed at an equal flow rate in each tube of each heat transfer tube 1 and are formed in a film shape on the inner wall surface of each heat transfer tube 1. A falling liquid distributor 4 having a function of distributing is provided. The sprayer 3 is installed in the body 1A above the absorbent pool 2, and the absorbent introduction part 21 is provided through the body 1A.

  The heating chamber 6 at the center position of the body 1A is formed by a space surrounded by the body 1A between the upper partition plate 7 and the lower partition plate 8, and the condensable heat source fluid 41 for heating and the absorbing liquid film 40, a heat exchanger tube 1 bundle forming a heat exchanging unit 40, a condensable heat source fluid introduction unit 10 and a condensate storage chamber 11 with a condensate outlet 11a are provided. The heat source fluid introduction part 10 and the condensate storage chamber 11 are provided at the upper end side and the lower end part of the body 1A of the heating chamber 6, respectively.

  Further, a gas-liquid separation chamber 12 is formed below the lower partition plate 8, and an entrance prevention device 16 with a first eliminator 16 a and a generated refrigerant vapor deriving portion 15 are provided at the side of the gas-liquid separation chamber 12. Is provided. The generated refrigerant vapor outlet 15 is provided on the inner wall surface of the body 1 </ b> A above the absorbing liquid storage chamber 13, and the absorbing liquid outlet 14 is provided at the bottom of the absorbing liquid storage chamber 13.

Accordingly, the regeneration-requiring absorbent 40a is sprayed from the sprayer 3 in the absorbent distribution chamber 20 to the absorbent pool 2 in the absorbent distribution chamber 20, and then flows down to the heat transfer tubes 1 by the falling liquid distributor 4. It flows down in the form of a film distributed on the inner wall surface of the tube, and is heated by the condensable heat source fluid 41 for heating introduced into the heating chamber 6 at that time, and the refrigerant component evaporates therefrom. Further, the regenerated absorbent 40b after exiting the bottom of the heat transfer tube 1 enters the lower absorbent reservoir 13 and temporarily accumulates. Further, the refrigerant vapor that has exited the bottom of the heat transfer tube 1 enters the entrainment prevention device 16, and the droplets held by the refrigerant vapor are captured by the first eliminator 16 a, and a low temperature (not shown) downstream from the generated refrigerant vapor deriving unit 15. It is introduced into the regenerator part or the condenser part.
Moreover, as a constituent material of the heat exchanger tube 1, a copper-type material or a cupronickel material is suitable.
FIG. 5 shows the configuration of the sprayer 3, and as shown in the figure, the sprayer 3 is composed of an annular cylinder 3a, and a liquid hole 3b is provided at the bottom thereof, and the side surface of the annular cylinder 3a is provided. The absorption liquid introduction part 21 is joined and configured. In this way, the regeneration-requiring absorbent 40a introduced into the absorbent introduction section 21 is sprayed into the absorbent pool 2 below from the bottom liquid hole when entering the sprayer 3.

6 to 8 show a specific configuration of the falling liquid distributor 4. As shown in the figure, the falling liquid distributor 4 has a support part 4a, a blending part 4b, a gap channel 4c, and a refrigerant vapor channel 4d in the flange 4e at the bottom of the cylindrical part 4A. That is, a support portion 4a is provided below the flange portion 4e, a blending portion 4b is provided below the flange portion 4e, and a gap channel 4c is provided below the blending portion 4b. The refrigerant in the cylinder portion 4A The generated refrigerant vapor flows in the vapor passage 4d to the gas-liquid separation chamber 12 together with the regeneration-requiring absorbent 40a.
The gap channel 4 c is formed by a gap between the outer wall surface of the functional part of the falling liquid distributor 4 and the inner wall surface of the heat transfer tube 1. Further, the support part 4a and the blending part 4b are for holding the gap flow path 4c, and the refrigerant vapor flow path 4d at the center of the falling liquid distributor 4 is provided in the absorption liquid distribution chamber 20 and below it. The gas-liquid separation chamber 12 is placed under steam pressure through the heat transfer tube 1.
Therefore, the regeneration-requiring absorbent 40a introduced into the falling liquid distributor 4 is easily distributed in the form of a film on the inner wall surface of the heat transfer tube 1 by the gap flow path 4c and flows down. Further, since the falling liquid distributor 4 installed in each heat transfer tube 1 has the same shape, the flow rate of the regeneration-absorbing liquid 40a required to be distributed to each heat transfer tube 1 is the same due to the same liquid level difference.

FIG. 9 shows the configuration of the entry prevention device 16. As shown in the figure, the entrainment prevention device 16 is mounted on the generated refrigerant vapor deriving section 15, in which a first eliminator 16a is placed in an overlapping manner, and a generated refrigerant vapor channel 16aA is formed between the first eliminators 16a. Is. Accordingly, the generated refrigerant vapor in the gas-liquid separation chamber 12 collides with the first eliminator 16a and is captured before leaving the generated refrigerant vapor deriving unit 15. This prevents the splash from entering the condensate of the generated refrigerant vapor.
The same parts as those in FIG. 4 are denoted by the same reference numerals, and the description thereof is omitted.

In addition, when the regeneration-requiring absorbent 40a is introduced into the absorbing liquid distribution chamber 20, a flash phenomenon due to the degree of superheat of the regeneration-requiring absorbent 40a appears due to the regeneration flow, accompanied by an entrainment (a droplet entrainment phenomenon). It's easy to do. Regarding this, it is one of the measures to provide the entrainment prevention device 16 in the generated refrigerant evaporation deriving portion 15 in the gas-liquid separation chamber 12 as described above, but as a further measure, the absorption liquid distribution chamber 20 is provided as described later. A splash separator (not shown) is provided inscribed.
10 and 11 show a configuration example of the collision type droplet separation device 18A of the present invention. As shown in the figure, the collision type droplet separation device 18A has a flow guide plate 18a at the bottom thereof fixed to the inner wall of the fuselage 1A in the fuselage 1A above the absorbent separation chamber 20, and an edge of the flow guide plate 18a. And an inner wall surface of the adjacent fuselage 1A form an annular gap channel 18c, and a second eliminator 18b is provided on the outer periphery of the flow guide plate 18a and the inner side of the adjacent fuselage 1A. .
Therefore, the generated refrigerant vapor when the regeneration-requiring absorbent 40a is introduced into the absorbent distribution chamber 20 by the sprayer 3 is a wide flow path between the second eliminators 18b provided above the sprayer 3. It is easily captured by the second eliminator 18b in which the entrained droplets overlap. Thereby, it is possible to prevent the generated splashes from entering the lower gas-liquid separation chamber 12 through the refrigerant vapor flow path 4d of the falling liquid distributor 4 of the heat transfer tube 1. The body 1A and the flow guide plate 18a are fixed by a plurality of fixing portions 18Ab.
In addition, the same code | symbol is used for the same part as FIG. 4, and the description is abbreviate | omitted.

FIG. 12 shows the form of the heating chamber 6. The space between the upper partition plate 7 of each heat transfer tube 1 is hermetically fixed by welding or the like, and the space between the lower portion of each heat transfer tube 1 and the lower partition plate 8. It is hermetically fixed by welding parts 7a, 8a and the like.
In addition, the same code | symbol is attached | subjected to the same part as FIG. 4, and the description is abbreviate | omitted.

FIG. 13 specifically shows the condensate storage chamber 11 of FIG. 4, and this condensate storage chamber 11 is provided on the outer surface of the body 1A in communication with a condensate passage 11A formed in the body 1A. The condensate outlet 11a is provided at the bottom 11b of the condensate reservoir 11 so as to hang downward.
The condensate at the bottom of each heat transfer tube 1 is introduced into the condensate storage chamber 11 through the condensate passage 11A, and is led out to the outside through the condensate outlet 11a.

Next, the case where it operates in the above structure is demonstrated.
The regeneration condensing device according to the present invention is the first inventor of a condensing device relating to a lithium bromide solution absorption refrigerator or an absorption chiller / heater, and the regeneration absorbing liquid 40a required is distributed in the form of a film on the inner wall surface of each heat transfer tube 1. Then, by supplying the condensable heat source fluid 41 to the outer wall surface of each heat transfer tube 1 and heating it, it can be regenerated into the absorption liquid 40b after regeneration.

  In FIG. 4, the regeneration-requiring absorbent 40a supplied from the sprayer 3 is supplied to the absorbent pool 2 through each liquid hole 3b, and the regeneration-requiring absorbent 40a supplied to the absorbent pool 2 is the falling liquid. It flows into the inner wall surface of each heat transfer tube 1 from the gap flow path 4c of the distributor 4, and flows down as an absorbing liquid film 40 as shown in FIG.

  As described above, when the regeneration-requiring absorbent 40a flows down to the inner wall surface of each heat transfer tube 1, the condensable heat source fluid 41 is introduced from the heat source fluid introduction section 10, so that The regeneration-requiring absorbent 40a is regenerated by heat exchange and stored in the absorbent storage chamber 13 below the body 1A.

  In the above-described case, the vapor component of the regenerated absorption liquid 40b in the absorption liquid storage chamber 13 is led out to the outside through the generated refrigerant vapor deriving unit 15, and the condensate 41a of the condensable heat source fluid 41 is transferred to the lower partition plate 8. Then, after entering the condensate storage chamber 11 and temporarily accumulating, it is led out from the condensate outlet 11a.

Therefore, the following operations can be achieved by the above-described configuration of the present invention.
(1) Heat transfer on the heated absorbent side is not affected by the liquid level difference.
(2) The local heat transfer coefficient on the falling film side in the pipe is high.
(3) High local condensation heat transfer coefficient.
(4) The required heat transfer area can be remarkably reduced for a certain absorption liquid regeneration capacity.

  INDUSTRIAL APPLICABILITY The present invention can be applied to the regeneration of absorption liquid in an absorption refrigerator or absorption cold / hot water machine and the regeneration of absorption liquid by heating a condensable heat source fluid.

It is principle explanatory drawing which shows the heat exchange operation | movement of the heat exchanger tube of the condensation apparatus for absorption refrigerators by this invention. It is sectional drawing of FIG. FIG. 2 is a temperature distribution diagram of a downstream flowing absorption liquid film and a heat source fluid outside the tube in the axial direction of the heat transfer tube of FIG. 1. 1 is an overall configuration diagram of a regeneration condenser according to the present invention. FIG. 5 is an enlarged back view of the sprayer 3 of FIG. 4. It is an expanded sectional view of the part shown with the code | symbol B of FIG. It is sectional drawing which shows the principal part of FIG. FIG. 8 is a bottom view of FIG. 7. FIG. 5 is an enlarged perspective view specifically showing the entry prevention device of FIG. 4. It is sectional drawing which shows the form of the absorption liquid distribution chamber 20 equipped with the droplet separation apparatus of FIG. It is A-A 'sectional drawing of FIG. It is an expanded sectional view which shows the other form of the heating chamber of FIG. It is an expansion perspective view which shows the condensate storage chamber of FIG. 4 concretely. It is a block diagram which shows the conventional regenerator.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Heat exchanger tube 1A Fuselage 2 Absorbing liquid pool 3 Sprinkler 3a Annular cylinder 3b Liquid hole 4 Falling liquid distributor 4A Cylindrical part 4a Support part 4b Mixing part 4c Gap channel 4d Refrigerant vapor channel 4e Eave part 6 Partition plate 8 Lower partition plate 10 Heat source fluid introduction section 11 Condensate storage chamber 11A Condensate passage 11a Condensate discharge section 12 Gas-liquid separation chamber 13 Absorbed liquid storage chamber 14 Absorbed liquid discharge section 15 Generated refrigerant vapor discharge section 16 Entreprevention device 16a 1st eliminator 18A Collision type droplet separation device 18a Flow guide plate 18b 2nd eliminator 18c Annular gap channel 20 Absorbing liquid distribution chamber 21 Absorbing liquid introducing part 40 Absorbing liquid film 40a Regenerating absorbing liquid 40b Regenerated absorbing liquid 41 Condensable Heat source fluid 41a Condensate of condensable heat source fluid

Claims (8)

A plurality of heat transfer tubes (1) supported by an upper partition plate (7) and a lower partition plate (8) that are spaced apart from each other at the upper and lower portions of the vertically arranged body (1A);
Absorbent liquid pool (2) formed on the upper partition plate (7) for supplying the regenerative absorbent (40a) to each heat transfer tube (1), the upper partition plate (7) and the lower partition A heating chamber (6) formed between the plate (8) and having a heat source fluid introduction part (10) for introducing and deriving a condensable heat source fluid (41) and a condensate outlet part (11a), A gas-liquid separation chamber (12) and an absorption liquid storage chamber (13) formed below the lower partition plate (8), and an entry provided inside the body (1A) of the gas-liquid separation chamber (12). A prevention device (16),
The absorbing liquid film (40) flowing down the inner wall side of each heat transfer tube (1) is configured to be regenerated by heating the condensable heat source fluid (41) supplied to the outer wall side of each heat transfer tube (1). A regenerative condensing device.   The regenerative condensing device according to claim 1, wherein the heat transfer tube (1) is made of a copper-based material or a cupronickel material.   A sprayer (3) disposed above the absorbent pool (2) and formed in a ring shape, and a plurality of liquid holes (3b) formed on the lower surface of the sprayer (3), The regeneration condensing apparatus according to claim 1 or 2, wherein the regeneration-required absorbent (40a) is supplied to the absorbent pool (2) through the liquid hole (3b).   In the upper part of the heat transfer tube (1), a falling liquid distributor (4) is provided, and the cylindrical part (4A) of the falling liquid distributor (4) has a flange part (4e) and the flange part ( 4e) a support part (4a) provided at the bottom, a blending part (4b) provided below the collar part (4e), and a gap channel (below the blending part (4b)) ( The regenerative condensing device according to any one of claims 1 to 3, wherein 4c) is formed.   2. The entrainment prevention device (16) having a first eliminator (16 a) is provided in a generated refrigerant vapor outlet portion (15) provided on an outer surface of the body (1 A). Thru | or 4, the reproduction | regeneration condensation apparatus in any one.   A collision type droplet separation device (18A) is provided in the center of the absorption liquid distribution chamber (20) at the upper part of the body (1A), and the collision type droplet separation device (18A) has a flow guide plate (18a). And a second eliminator (18b), the flow guide plate (18a) is positioned below the sprayer (3) and an annular gap channel (18c) between the periphery thereof and the body (1A). ), The second eliminator (18b) is positioned above the sprayer (3), and the regeneration-required absorbent (40a) flows down into the annular gap channel (18c). The regenerative condensing device according to any one of claims 1 to 5, wherein   The heat transfer tubes (1) pass through the upper partition plate (7) and the lower partition plate (8), and the heat transfer tubes (1) and the partition plates (7, 8) are hermetically fixed. The regeneration condensing device according to any one of claims 1 to 6.   A condensate reservoir (11) is provided in communication with a condensate passage (11A) formed on the outer surface of the body (1A), and the condensate reservoir (11) includes the condensate outlet (11a). The regenerative condensing device according to any one of claims 1 to 7, further comprising:

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