JP3263483B2 - Direct firing regenerator - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a direct-fired regenerator (hereinafter, referred to as a regenerator) used in an absorption refrigerator.

[0002]

2. Description of the Related Art As a regenerator used in a lithium bromide-water-based absorption refrigerator, for example, JP-A-63-2593 is known.
The technology disclosed in Japanese Patent No. 62 is well known. As shown in FIGS. 5 and 6, the regenerator proposed here incorporates a furnace 2 in which a body 1 can be equipped with a burner B, and a solution heat is generated by the combustion heat generated by the gas burned by the burner. The solution (dilute solution) flowing from the inlet 11 is heated, and the refrigerant absorbed in the solution is evaporated and separated, and the concentration itself increases to become an intermediate solution, and the solution outlet formed on the upper side wall of the body 1 A flue 4 communicating with the furnace 2 at the back so that the solution that has flowed in from the solution inlet 11 can be efficiently heated until it leaves the solution outlet 12. Furnace 2
A chimney 7 for exhausting burned gas
Is formed so as to be located above the burner mounting port 22, so that the solution flowing from the solution inlet 11 is directly heated through the furnace tube 21, and the flue gas 4 is also heated by the heat of the burned gas. The heating is performed via the solution pipe 5 installed in the apparatus, thereby increasing the efficiency of evaporating and separating the refrigerant.

[0003]

However, in the conventional regenerator having the above structure, the width W1 of the flue 4 is formed to be the same as the maximum width W2 of the furnace tube 21, and the upper portion of the furnace tube is relatively flat. Therefore, it is difficult to supply the solution to the solution pipe 5 located at the center, so that the temperature of the heat transfer surface in this part of the solution pipe rises abnormally and corrosion is likely to proceed. There was a problem, and solving this point was an issue.

In addition, since the number of the solution pipes 5 is large, the number of steps for piping by welding is increased, and there is a problem that productivity is not improved.

[0005]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems of the prior art, and includes a furnace tube, a flue, a solution flowing section surrounding them, and a solution communicating with the solution flowing section. In the regenerator consisting of a tube group and a steam flow section, the furnace tube has a circular vertical section, and the flue communicating with the downstream side of the combustion chamber in the furnace via the flue return chamber is located above the furnace tube. Provided, and a regenerator characterized in that the width of the flue is formed narrower than the width of the furnace tube,

Further, a furnace tube, a flue communicating with a downstream side of the combustion chamber in the furnace tube via a flue return chamber, a solution flowing section surrounding these, a solution pipe group communicating with the solution flowing section, and steam A regenerator comprising a circulation unit, wherein a baffle is provided in a flue return chamber.

[0007]

[0008]

In the part surrounding the furnace tube of the solution flow section, the furnace tube is formed to have a circular vertical cross section, so that the heated solution here rises quickly. In addition, since the flue formed above the furnace tube is formed to be narrower than the furnace tube, the solution is smoothly supplied to the solution pipe located at the center of the flue. Since the abnormal temperature rise of the solution tube in this portion is avoided, the effect of preventing the progress of corrosion is great. In a regenerator provided with a baffle in the flue return chamber, the combustion gas is agitated by the baffle, so that the temperature distribution of the combustion gas flowing into the flue is averaged, and the solution pipe provided in the flue is removed. The effect of the heating action is averaged out.

[0009]

Embodiment 1 Hereinafter, an embodiment of the present invention will be described in detail with reference to FIGS. In these drawings, the portions indicated by the same reference numerals as those in FIGS. 5 and 6 are portions having the same functions as the portions described with reference to the drawings, and will be described to the extent that the understanding of the present invention is not hindered. Was omitted.

In the regenerator of the present invention, the furnace tube 21 surrounding the furnace 2 is formed so that its vertical cross section is circular, and the flue 4 formed above it has a width W.
1 is smaller than the width W2 of the furnace tube 21, for example, W1
/W2=0.7. Reference numeral 3 denotes a flue return chamber communicating with both the furnace 2 and the flue 4 at the back thereof, and a baffle 31 is formed in the flue return chamber to intentionally disturb the flow of the combustion gas. The height of the vertically elongated portion is increased.

On the other hand, reference numeral 9 denotes a baffle provided before the steam inlet 81 of the steam chamber 8, and a solution heated and blown up from the solution pipe 5 or the like near the flue return chamber 3 is used for the steam chamber. 8 is not mixed.

In the regenerator having the above structure, when a gas burner (not shown) is attached to the burner mounting port 22 of the furnace tube 21 to burn gas, a flame is formed toward the interior of the furnace 2 and generated. The high-temperature combustion gas is reversed in the flue return chamber 3 toward the burner mounting port 22 and is discharged from the chimney 7 installed in the smoke chamber 6 via the flue 4.

In the course of the combustion and the exhaust, the solution flowing from the solution inlet 11 is heated, and the refrigerant vapor generated here flows into the vapor chamber 8 from the vapor inlet 81 and is discharged from the vapor outlet 82, and the refrigerant vapor is discharged. The solution whose concentration has increased due to evaporation of the solution is discharged from the solution outlet 12.
Since the vertical cross section of 1 is formed in a circular shape, the solution heated in the solution flowing section R1 surrounding the furnace tube 21 can quickly rise and flow into the solution pipe 5. Moreover, the width W1 of the flue 4 in which the solution pipe 5 is installed is equal to the width W of the furnace tube 21.
Since the solution heated in the solution flow section R1 flows into the solution pipe 5 at the center without difficulty, the solution pipe does not become overheated.

On the other hand, since the baffle 31 is provided in the flue return chamber 3, the high-temperature combustion gas is stirred here, and the temperature of the gas is averaged when flowing into the flue 4.
The solutions in all the solution tubes 5 are efficiently heated to almost the same state.

Incidentally, in the regenerator of the present invention, the furnace 2
Since the flame is formed toward the back of the furnace as described above, the highest temperature is at the rear tube sheet 23 of the furnace tube 21 which is directly hit by the flame. Therefore, the solution is most effectively heated in the solution flow section R2 formed between the rear tube plate 23 and the body rear plate 13, and then the solution close to the flue return chamber 3 where the hot combustion gas is reversed. In tube 5, the solution boils in the vicinity and blows up vigorously with the bubbles generated.

However, in the regenerator of the present invention, since the baffle plate 9 is provided, even if the heated solution blows up vigorously from the solution pipe 5 near the solution flow section R2 and the flue return chamber 3. The solution does not enter the steam chamber 8 from the steam inlet 81.

On the other hand, no flame is formed in the vicinity of the burner mounting port 22 in front of the furnace 2, so that the solution in this portion has a low liquid temperature and does not boil. Convection occurs due to the suction.

As described above, in the regenerator of the present invention, convection of the solution occurs from the front to the back, from the bottom to the top, and the solution is also supplied to the solution tube 5 located at the center without any difficulty, so that the solution is effectively supplied Heated. This not only makes it possible to reduce the size of the apparatus, but also prevents overheating of the solution tube 5 at the center, so that corrosion of this portion is significantly reduced.

Further, in the regenerator in which the baffle 31 is provided in the flue return chamber 3, the strength is improved. Therefore, if the regenerator is formed in a vertically long shape and the solution is heated by the solution tube 5 formed long, It is possible to reduce the number of solution tubes for which piping work is troublesome, and to improve productivity.

Since the present invention is not limited to the above embodiment, various modifications can be made without departing from the spirit of the appended claims.

[0021]

As described above, the regenerator according to the present invention is a regenerator comprising a furnace tube, a flue, a solution circulation section surrounding them, a solution pipe group communicating with the solution circulation section, and a vapor circulation section. , The vertical section of the furnace tube is formed in a circular shape, a flue communicating with the downstream side of the in-furnace combustion chamber via a flue return chamber is provided above the furnace tube, and the width of the flue is reduced. Since it is a regenerator formed narrower than the width of the furnace tube,

The solution is smoothly supplied to the solution pipe located at the center of the flue, and an abnormal rise in the temperature of the solution pipe in this portion is avoided, so that the effect of inhibiting the progress of corrosion is great. . Further, the number of solution pipes can be greatly reduced, so that the number of welding steps for providing the solution pipes can be reduced, and the work of mounting the weld pipes can be greatly simplified. Further, since the width of the regenerator is reduced, the filling amount of the absorbing liquid can be reduced.

In a regenerator provided with a baffle in the flue return chamber, the baffle stirs the high-temperature combustion gas and equalizes the temperature distribution of the combustion gas flowing into the flue. Since the heating action via the solution pipe is averaged and more effective heating is performed, the size of the apparatus can be reduced.

[0024]

[Brief description of the drawings]

FIG. 1 is an explanatory diagram of one embodiment.

FIG. 2 is an explanatory sectional view taken along line XX of FIG. 1;

FIG. 3 is an explanatory sectional view taken along line YY of FIG. 1;

FIG. 4 is an explanatory sectional view taken along line ZZ of FIG. 1;

FIG. 5 is a partially cutaway explanatory view of a conventional example.

FIG. 6 is an explanatory sectional view of a conventional example.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 body 11 solution inlet 12 solution outlet 13 body back plate 2 furnace 21 furnace tube 22 burner attachment port 23 rear tube sheet 3 flue return chamber 31 baffle 4 chimney 5 solution pipe 6 smoke chamber 7 chimney 8 steam chamber 81 steam Inlet 82 Steam outlet 9 Baffle plate B Burner R1, R2 Solution flow section W1, W2 Width

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int. Cl. ⁷ , DB name) F25B 33/00

Claims (2)

(57) [Claims] 1. A direct-fired regenerator comprising a furnace tube, a flue, a solution circulation part surrounding them, a solution pipe group communicating with the solution circulation part, and a vapor circulation part, wherein the furnace cylinder has a circular vertical cross section. And a flue communicating with the downstream side of the in-furnace combustion chamber via the flue return chamber is provided above the flue, and the flue is formed to have a width smaller than the width of the flue. A direct-fired regenerator characterized in that: 2. A furnace tube, a flue communicating with a downstream side of the combustion chamber in the furnace via a flue return chamber, a solution flowing part surrounding these, a solution pipe group communicating with the solution flowing part, and steam. A direct-fired regenerator comprising a distribution unit, wherein a baffle is provided in a flue return chamber.