JPS6222068B2 - - Google Patents

Description

[Detailed Description of the Invention] A. Technical Field This invention relates to an absorber used in an absorption heat pump, etc., and particularly relates to a plurality of absorbers that are attached to each other to form alternate cooling and absorption channels between them. This invention relates to a plate type absorber made of plates.

B. Prior Art A conventional plate-type absorber is known in which a small hole is formed in the plate facing the absorption channel, and the absorbed gas is blown into the solution flowing inside the absorption channel through the small hole and absorbed by the solution. It is being However, in this case, it is necessary to dispose of the absorbed surplus gas because it is ejected into the solution from a small hole, and a high-pressure absorbed gas is required, resulting in a large amount of energy loss.

C. Purpose of the Invention The present invention aims to solve the above-mentioned drawbacks of conventional absorbers of this type. That is, an object of the present invention is to provide a plate type absorber that does not require a high absorption gas supply pressure and is therefore highly effective in saving energy.

D. Structure of the Invention In order to achieve the above object, the plate type absorber of the present invention is provided with a steam supply port 2 in the upper part, a solution discharge port 3 in the lower part, and a cooling water supply port 4 and a discharge port 5. shell 1 with gaskets 13, 14 ₁ to 14;
14 ₃ and communicate with the internal space C of the shell 1 through openings 15 ₁ to 15 ₄ at the top, both sides, and bottom, while connecting the cooling water supply port 4 and the discharge port 5 with each other. The first blockage
passage A and the internal space C of the shell 1 are blocked, and the cooling water supply port 4 and the discharge port 5 are closed.
_a plurality of vertically _extending plates 9 alternately forming second passages B communicating with the passages; It includes 16 groups of nozzles arranged in multiple stages for spraying the solution.

E. Effect of the Invention By injecting the solution from the nozzle 16 into the passage A, a thin falling liquid film is formed by the droplets on the heat transfer surface of the plate 9, and at the same time, from the steam supply port 2 to the shell 1. The steam supplied inside flows into each passage A, and the steam and the solution come into contact with each other, resulting in an absorption exothermic effect. Due to this heat generation, the cooling water flowing from the supply port 4 through the through hole 11 into the adjacent passage B is evaporated. The generated high-temperature water vapor reaches the outlet 5 through the through hole 12 together with unevaporated cooling water.

The water vapor is taken out from the outlet 22 through the gas-liquid separator 20, and the cooling water separated from the water vapor is recycled.

F. Effects of the Invention According to the present invention, since the solution is in the form of a thin film, it has no hydraulic pressure, and therefore, the desired performance can be obtained by feeding the absorbed gas at a relatively low pressure. Furthermore, since it is sufficient to supply the solution in the form of a thin film on the heat transfer surface and because a plate with a short heat transfer length is used, the pump power required for supplying the solution can be considerably small. Thus, the present invention can provide a plate-type absorber with high energy-saving effects.

G. Embodiments Hereinafter, embodiments of the present invention shown in the drawings will be described in detail.

First, referring to FIG. 1, the shell 1 has a cylindrical shape with an elliptical cross section extending in the horizontal direction, and is equipped with a steam supply port 2 at the top and a solution discharge port 3 at the bottom. A cooling water supply port 4 and a discharge port 5 are provided on an end face 6 of the shell 1. The other end of the shell 1 is open as indicated by the reference numeral 7, and the end plate 8
is closed by flanging it to shell 1.

A plurality of plates 9 are clamped between the shell 1 and the end plate 8. As can be seen from FIG. 2, each plate 9 is approximately rectangular and has a heat transfer surface with a short heat transfer length (preferably 4 m or less), and has through holes 11 and 12 that allow cooling water to flow therethrough. have The plate 9 extends vertically, and when the plates 9 are in the palm-to-peer position, all of the through holes 11 and 12 are aligned, with the through hole 11 being the cooling water supply port 4 and the through hole 12 being the cooling water discharge port. It communicates with exit 5.

When these plurality of plates 9 come into contact with each other via gaskets, alternate passages A and B are formed between the plates. To explain in detail, as can be clearly seen from Figure 3, the solution path A
are partially cut out gaskets 14 ₁ to 14
₃ , it is disconnected from the through holes 11, 12, and communicates with the internal space C of the shell 1 through openings ₁₅₁ to ₁₅₄ in the cutout portions of the gasket, that is, the upper, both sides, and lower portions. The cooling water passage B is formed by a gasket 13 extending along the outer periphery of the plate 9.
While the inner space C of the shell 1 is closed off, it communicates with the through holes 11 and 12, and thus also with the cooling water supply port 4 and the discharge port 5.

Nozzle 16 for injecting solution into each passage A
Groups of headers 17 are arranged, respectively, in the upper opening 15 ₁ and in the side openings 15 ₂ , 15 of the passage A.
It is located so that the nozzle 16 is facing ₃ . In the illustrated example, the nozzle groups are provided in three stages, but two or four or more stages may be provided as necessary.

Referring again to FIG. 1, the cooling water supply port 4 and the discharge port 5 are connected to a gas-liquid separator 20 via pipes 18 and 19, respectively, and a water supply nozzle 21 is attached to the pipe 18. be. 22 is a water vapor outlet.

Next, the operation of the plate type absorber constructed as described above will be described.

First, a concentrated solution is poured from the nozzle 16 through the openings 15 at the top and both sides, as shown by the broken line in FIG.
₁ to 15 ₃ into the passage A. A thin falling liquid film is thus formed by the droplets of the concentrated solution on the heat transfer surface of the plate 9 facing the passage A. Furthermore, the steam supplied into the shell 1 from the steam supply port 2 flows into the passage A from the openings 15 ₁ and 15 ₃ at the top and both sides. As a result, the concentrated solution absorbs vapor and becomes a dilute solution, and an exothermic effect of absorption occurs. The dilute solution flows down along the heat transfer surface, falls to the bottom of the shell 1 through the lower opening ₁₅₄ , and is taken out of the vessel through the solution outlet 3.

On the other hand, the cooling water supplied from the supply port 4 is
As shown by solid lines in the figure, the water flows from the through hole 11 into each passage B and heads toward 12. At this time, it is heated by the absorption heat generation effect in the adjacent passage A, and high-temperature steam is generated. The generated water vapor and unevaporated cooling water reach the gas-liquid separator 20 via the through hole 12, the outlet 5, and the pipe line 19. Water vapor and cooling water are separated by the gas-liquid separator 20, and the water vapor is taken out from the outlet 22. Cooling water is recirculated through line 18.

Note that a certain amount of new cooling water is supplied from the water supply nozzle 21 to replenish the evaporated water, or independently thereof, and this promotes the circulation effect of the cooling water.

[Brief explanation of the drawing]

The drawings show one embodiment of the plate type absorber of the present invention, and FIG. 1 is a longitudinal sectional view, and FIG.
FIG. 3 is an exploded perspective view showing how the plates overlap and the state of fluid flow. 1... Shell, 2... Steam supply port, 3... Solution outlet, 4... Cooling water supply port, 5... Cooling water outlet, 9... Plate, 11, 12... Through hole, 1
3, 14 ₁ ~ 14 ₃ ... Gasket, 15 ₁ ~ 1
5 ₄ ... Opening, 16... Nozzle, 20... Gas-liquid separator, A... Solution passage, B... Cooling water passage.

Claims (1)

[Scope of Claims] 1. A shell having a steam supply port at the top, a solution discharge port at the bottom, and a cooling water supply and discharge port; housed within the shell and connected to each other via a gasket. and alternately forming second passages communicating with the internal space of the shell through openings in the upper part, both sides, and the lower part, and communicating with the cooling water supply port and the discharge port.
a plurality of plates extending vertically; and a group of nozzles arranged in multiple stages for injecting a solution from openings at the top and sides of the first passage toward the inside of the passage;
A plate type absorber that includes: 2. The plate type absorber according to claim 1, wherein the cooling water supply port and the discharge port are connected to a gas-liquid separator, so that the cooling water is circulated.