JPH0721363B2 - Direct-fired generator - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to an absorption refrigeration system of a type in which a combustion gas passage is horizontally arranged in a vessel and a solution pipe group is vertically arranged in the passage. Machine (for absorption heat pump device, absorption chiller / heater)
The present invention relates to an improvement in a direct-fired generator.

(B) Prior art In the above-mentioned direct-fired generator, the heat exchange between the liquid and the gas in the solution pipe arranged on the central side of the combustion gas passage is good, but on the other hand, near the inner wall of the passage. The liquid and gas in the arranged solution pipes tend to be inferior, and the combustion gas flowing near the inner wall of the passage tends to be discharged to the outside of the device at a high temperature.

In order to eliminate such disadvantages, as shown in, for example, Japanese Utility Model Laid-Open No. Sho 58-24649, a conventional technique for a direct-fired generator of the above-mentioned type, as shown in Japanese Utility Model Laid-Open No. 58-24649, both inner walls of the furnace tube (both sides of the passage for combustion gas The inner wall] is provided with a baffle, and the surface on the upstream side of this baffle is inclined in the downstream direction of the combustion gas.

(C) Problems to be Solved by the Invention In the conventional direct-fired generator as described above, the combustion gas that easily flows at high temperature along both inner walls of both sides of the furnace tube is Although there is an advantage that it can lead to the solution pipes arranged in the immediate vicinity and promote heat exchange between the absorbing liquid and the combustion gas in these pipes, the combustion gas flowing near the inner walls on both sides of the furnace pipe Since it does not have a function of guiding it to the central side, the combustion gas flowing near the inner walls on both sides of the furnace tube is liable to be discharged to the outside of the reactor at a high temperature. That is, there is a problem that the temperature unevenness of the gas in the furnace cylinder is not sufficiently reduced and the absorbent is likely to be unevenly heated and concentrated.

In view of such a problem, the present invention can further reduce the unevenness of the gas temperature in the furnace tube (combustion gas passage) compared with the conventional one, and further alleviate the unevenness of heating and concentration of the absorbing liquid. The purpose of the present invention is to provide a direct-fired generator that can be used.

(D) Means for Solving the Problems As a means for solving the above problems, the present invention is directed to solving the above-mentioned problems by using a direct-fired generator of the above-mentioned type, in which gas is provided on both inner walls and / or upper inner walls of the combustion gas passage. A plurality of baffles for the flow are provided, and the length of each baffle from the inner wall is made longer toward the downstream side of the combustion gas passage.

(E) Action In the direct-fired generator of the present invention, the baffle plate formed so as to extend to the downstream side of the combustion gas passage has a function of guiding the gas flow to the central portion side of the passage. That is, in the above-mentioned type of direct-burning generator, it is necessary to utilize the characteristic that the heat exchange between the absorbing liquid and the combustion gas in the solution pipe group arranged on the central side of the combustion gas passage is good. In addition, the baffle plate exerts an action of concentrating most of the combustion gas toward the central portion of the passage and flowing it. Therefore, in the direct-fired generator of the present invention, as compared with the conventional one, a part of the combustion gas remains at a high temperature and is less likely to be discharged to the outside of the device, and the temperature unevenness in the passage is also reduced. The non-uniformity of heating and concentration of the liquid is also alleviated.

(F) Example FIG. 1 is a longitudinal sectional view of an example of a direct-fired generator for an absorption refrigerator according to the present invention, and FIGS. 2 and 3 are the examples shown in FIG. 1, respectively. II-II, a cross-sectional view taken along the line II of FIG.
It is a plane sectional view of a line arrow. In these figures,
(1) is a body of a direct-fired generator for an absorption refrigerator, which has a solution storage section (2) and a vapor separation section (3) surrounded by an inner wall and an outer wall. Reference numeral (4) is a furnace tube formed by a part of the inner wall of the case body (1), and a smoke chamber (5) for reversing combustion gas is similarly formed on the downstream side thereof. Reference numeral (6) is a combustion gas passage horizontally arranged in the vessel so as to be located above the furnace tube (4). The upstream end of the passage is connected to the smoke chamber (5) while the downstream end is exhaust gas smoke. It communicates with the room (7). (8) is a chimney connected to the upper wall of the exhaust gas smoke chamber (7).

(9), (9) ... are solution tubes vertically arranged in the combustion gas passage (6). And (10a), (10b), (10
c) is a baffle provided on the upper inner wall of the passage (6), (11a),
(11b) and (11c) are baffle plates provided on both inner walls of the passage (6), and these are formed so that the length from the tip to the inner wall of the passage (6) becomes longer toward the downstream side of the combustion gas. ing.

In addition, (12) is a pipe for introducing the absorption liquid sent from the absorber (not shown) side of the absorption refrigerator, and (13) is steam for introducing the refrigerant vapor to the condenser (not shown) of the absorption refrigerator. Outlet pipe, (14)
Is a steam header, (15) is an insertion port of a gun type burner (not shown), and (16) is a mount for the body (1). Although not shown in the figure, the generator is of course provided with a lead-out pipe for the absorption liquid heated and concentrated here.

A direct-fired generator for an absorption refrigerator configured as described above (hereinafter,
In this generator), from the tube (4) to the smoke chamber (5)
Although the combustion gas which has been inverted and flown into the passage (6) for combustion gas flows upward while flowing from the upstream side to the downstream side of this passage, the increased gas flow is caused by the baffle plate (10).
It is blocked by a), (10b), and (10c) and returned to the lower position. Further, the combustion gas which tends to flow along the inner walls on both sides of the passageway (6) is blocked by the baffle plates (11a), (11b), (11c) and moves to the central portion side of the passageway (6). Moreover, since the baffle plate is formed such that the distance from the inner wall of the passage (6) to the leading edge of the plate becomes longer as the baffle plate is provided on the downstream side of the passage (6), the flow of the combustion gas passes through the passage ( It exerts the function of concentrating on the central part side of 6). For this reason, in this generator, the heat exchange characteristics of a direct-fired generator of the type in which the combustion gas passages are horizontally arranged and the solution tube groups are vertically arranged in the passages, that is, the combustion gas passages are arranged on the central portion side of the combustion gas passages. It is possible to utilize the characteristic that the heat exchange between the absorbing liquid and the combustion gas in the tubes of the solution pipe group is good, and it is possible to improve the efficiency of heating and concentrating the absorbing liquid.

Moreover, since the baffle plate changes the flow direction of the combustion gas and exerts its turbulent flow promoting function, the temperature unevenness of the gas in the passage (6) is reduced, and the unevenness of heating and concentration of the absorbing liquid is alleviated. .

(G) Effect of the Invention As described above, the present invention is directed to a direct-fired generator of a type in which a passage for combustion gas is horizontally arranged and a solution pipe group is vertically arranged in the passage, and the combustion gas is fed to the center of the passage. Flow toward the side of the chamber to promote the turbulent flow of the gas, reduce the temperature unevenness of the gas in the passage, and alleviate the uneven heating and concentration of the absorbing liquid. It is of high practical value as it can improve the efficiency of heating and concentrating the absorption liquid as compared with the generator.

[Brief description of drawings]

FIG. 1 is a longitudinal sectional view showing an embodiment of a direct-fired generator for an absorption refrigerator according to the present invention, and FIGS. 2 and 3 are I-of the embodiment shown in FIG. 1, respectively. A cross-sectional view taken along the line I,
It is a plane sectional view taken along the line II-II. (1) ... Body, (2) ... Solution storage section, (3) ... Steam separation section, (4) ... Furnace tube, (5) ... Smoke chamber, (6) ... Combustion gas passage, (7) ... Exhaust gas smoke chamber, (9) ... Solution tube, (G)
…guide.

Claims (2)

[Claims] 1. A direct-fired generator for horizontally arranging a combustion gas passage in a vessel and vertically arranging a solution tube group in the passage to heat and concentrate the absorption liquid in the tube, A direct-fired generator characterized in that a plurality of baffles for gas flow are provided on the inner wall of the passage, and the length of each baffle from the inner wall is made longer toward the downstream side of the combustion gas passage. 2. The direct-fired generator according to claim 1, wherein the inner walls are inner walls on both sides and an upper portion of the annual income gas passage.