JP3883688B2 - High temperature regenerator - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a configuration of a high-temperature regenerator of an absorption refrigerator.
[0002]
[Prior art]
As this type of high-temperature regenerator, a large number of liquid pipes are installed in the heating chamber, and the refrigerant that evaporates is heated by the high-temperature flame and combustion gas generated by a planar flame burner, etc. It is well known that it is separated and supplied to a condenser or the like, and the concentration of the absorbing liquid is increased and supplied to a low-temperature regenerator or the like.
[0003]
[Problems to be solved by the invention]
Inside the liquid pipe located on the burner side, the absorbing liquid boils violently and the amount of bubbles (water vapor) generated increases. When the heat conduction from the tube wall to the absorbing liquid is significantly reduced due to the presence of bubbles, the temperature of the part may exceed 200 ° C., the absorbing liquid is the electrolyte, and the high temperature part is the anode. There is a problem that a primary battery is formed in which the low temperature portion becomes the cathode, and the anode portion, that is, the high temperature portion is severely corroded. However, it is necessary to make it difficult to corrode, and the solution of this point has been a problem.
[0004]
[Means for Solving the Invention]
In order to solve the above-described problems, the present invention provides a steam generation unit disposed above a heating chamber, a liquid circulation unit disposed below the heating chamber, and a vapor generation unit and a liquid circulation unit provided upright in the heating chamber. And a burner installed sideways facing the liquid tube in front of the heating chamber, and the burner absorbs the liquid injected up to a height exceeding the upper end of the liquid tube. In the high-temperature regenerator of the absorption refrigerator that heats the generated flame and the combustion gas generated from this flame and flows through the heating chamber to evaporate and separate the refrigerant contained in the absorbing liquid, the liquid pipe is made of iron or cast iron The upper tube plate constituting the bottom of the steam generating part and the upper end of the liquid pipe being welded and the lower tube plate constituting the ceiling part of the liquid circulating part and the lower end of the liquid pipe being welded joined, as different stainless steel or the like to the liquid pipe, upon heating in the burner A liquid pipe made of the iron or cast iron, and at least one of the tube plates made of the stainless steel, the high temperature of the first configuration has a configuration comprising an anode and a cathode of a primary cell that the absorbing solution and an electrolyte A container is provided.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of a high-temperature regenerator 100 according to the present invention will be described with reference to the drawings.
[0009]
Reference numeral 1 denotes a heating chamber, which is provided with a steam generation unit 2 above and a liquid circulation unit 3 below and surrounded by an iron plate or the like. The steam generation unit 2 and the liquid circulation unit 3 are composed of a large number of liquid pipes 4 erected in the heating chamber 1 and a right side gap 5 and a left side gap 6 between double walls provided on the sides of the heating chamber 1. And communicate with each other. In addition, a burner installation port 7 is opened in front of the heating chamber 1 and an exhaust port 8 is opened in the rear. The burner installation port 7 itself has a well-known planar flame type burner 9, and the combustion surface is a liquid pipe. It is installed towards 4.
[0010]
The liquid pipe 4 has a small number of first liquid pipe groups 4X that are densely arranged in a staggered manner on the burner installation port 7 side, and a number of liquid pipes 4 that are arranged in a staggered manner on the exhaust port 8 side. A combustion promoting space 10 in which the liquid pipe 4 is not erected at all is provided between the first liquid pipe group 4X and the second liquid pipe group 4Y. It has been.
[0011]
By disposing the liquid pipe 4 in this way, the flame and combustion gas generated by the planar flame type burner 9 quickly dissipate heat to the absorbing liquid in the liquid pipe in the first liquid pipe group 4X to lower the temperature. Therefore, the amount of NOx generated, which is said to increase during high-temperature combustion, is remarkably reduced, and thereafter, further reduction in temperature is suppressed in the combustion promotion space 10 to promote combustion, and the generation of CO, which is said to increase during low-temperature combustion, is suppressed. After that, the second liquid pipe group 4Y can be radiated and exhausted.
[0012]
An absorbing liquid header 11 is disposed below the liquid circulation part 3 on the burner installation port 7 side, and the absorbing liquid concentration is reduced by absorbing refrigerant from an absorber (not shown) of the absorption refrigerator in the absorbing liquid header. Dilute liquid is injected.
[0013]
In addition, an outlet 12 for refrigerant vapor is opened above the exhaust port 8 side of the steam generator 2, and an outlet 13 for absorbing liquid is opened on the side of the steam generator 2 below.
[0014]
For example, all the liquid tubes 4 in the first liquid tube group 4X standing on the burner installation port 7 side, or the liquid tubes 4 standing in a range from the burner installation port 7 to a predetermined distance, for example, 50 cm. 3, for example, as shown in FIG. 3, an iron (including cast iron, the same applies hereinafter) pipe 4 a that is approximately half the length of the liquid pipe 4 is made of, for example, a short stainless steel pipe (for example, made of SUS-304). ) The liquid pipe 4A welded and connected via 4a1 is used.
[0015]
In the liquid pipe 4A having this configuration, when the lithium bromide aqueous solution is filled therein as the refrigerant (water) absorption liquid, the stainless pipe 4a1 portion becomes the cathode of the primary battery using the absorption liquid as an electrolyte, and the iron pipe 4a. Since this portion becomes the anode, the corrosion resistance is inferior, but the cost is low. Therefore, the portion of the iron pipe 4a used in a large amount is in the form of full-surface corrosion and the local corrosion is prevented.
[0016]
Therefore, even if the liquid pipe 4A is erected close to the planar flame type burner 9, the absorption liquid boils violently therein and a part of the liquid pipe may be overheated to 200 ° C. or higher. Even if the entire surface is corroded little by little, the inconvenience that a part of the surface corrodes deeply and a hole is opened and the absorbing liquid leaks hardly occurs.
[0017]
Further, as shown in FIG. 4, a backing material 14 is applied from the inside to the through holes 4b1 dispersedly arranged in places of the iron pipe 4b having the same length as the liquid pipe 4, and arc welding or the like is performed from the front side. A stainless steel weld metal 4b2 such as SUS-304 is welded so as to be in contact with the absorbing liquid passing through the inside of the pipe, and the liquid pipe 4B is formed so as to be located on the whole of the first liquid pipe group 4X or the burner installation port 7 side. Even if the liquid pipe of the part is formed, the same effect as described in FIG. 3, that is, the local corrosion of the iron pipe 4b part of the liquid pipe 4B can be prevented.
[0018]
Further, as shown in FIG. 5, the first liquid pipe group 4X is formed by a liquid pipe 4C formed by welding and fixing a small piece 4c of stainless steel such as SUS-304 on the inner surface near the end of the iron pipe 4b. 3 or a part of the liquid pipe located on the burner installation port 7 side, the same effect as described in FIG. 3, that is, local corrosion of the iron pipe 4b portion of the liquid pipe 4C can be prevented. .
[0019]
Further, as shown in FIG. 6, one end of a stainless steel rod-like member 4d such as SUS-304 is welded to the inner surface of the iron pipe 4b to form a liquid pipe 4D, whereby the entire first liquid pipe group 4X is formed. Alternatively, even if a part of the liquid pipe located on the burner installation port 7 side is formed, the same effect as described in FIG. 3 can be obtained, and local corrosion of the iron pipe 4b can be prevented.
[0020]
Further, as shown in FIG. 7, the iron liquid pipe 4 is made up of an iron upper tube plate 15 constituting the bottom of the steam generating unit 2, and an iron lower tube plate 16 constituting the ceiling portion of the liquid circulating unit 3. When attaching so that the absorbing liquid does not leak into the pipe, all of the first liquid pipe group 4X or a part of the liquid pipes located on the burner installation port 7 side is welded with stainless steel such as SUS-304. Even if welding is performed depending on the material and the stainless weld metal 17 is disposed at the end of the liquid pipe 4, the same effect as described in FIG. 3, that is, the iron portion of the liquid pipe 4, in this case the liquid pipe The local corrosion can be prevented over the entire inner surface. The stainless steel weld metal 17 can be configured to be provided only on either the upper or lower side of the liquid pipe 4.
[0021]
Further, as shown in FIG. 8, at least one of the upper tube plate 15 and the lower tube plate 16, for example, the upper tube plate 15 having a higher temperature is made of, for example, a stainless steel plate such as SUS-304, and this is made of an iron liquid tube. Also in the high-temperature regenerator 100 in which 4 is fixed by welding, it is possible to prevent the same effect as described in FIG. 7, that is, local corrosion over the entire inner surface of the liquid pipe 4.
[0022]
Further, as shown in FIG. 9, the other end of the linear member 4e made of stainless steel such as SUS-304, for example, attached to the inner surface of the iron liquid pipe 4 is connected to the liquid pipe as in FIG. Also in the high temperature regenerator 100 in which the steam outlet 12 is opened by being pulled out from the welding pipe and fixed to the outer plate 18 of the steam generating section 2 having a temperature much lower than that of the liquid pipe 4. 3 is obtained, and local corrosion of the liquid pipe 4 made of iron can be prevented. The stainless steel linear member 4e may be fixed by welding to the outer plate 19 of the liquid circulation section 3.
[0023]
By the way, the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the spirit described in the claims.
[0024]
For example, in addition to the SUS-304, SUS-316, SUS-430, titanium, or the like may be used as a member for connecting the dissimilar metal disposed in a part of the liquid pipe or the inner surface of the liquid pipe to the low temperature member. good.
[0025]
It is also possible to form the dissimilar metal by a method of partially coating (plating).
[0026]
【The invention's effect】
As described above, in the high-temperature regenerator of the present invention, the iron pipe portion of the liquid pipe used in large quantities is in a general corrosion form because it is inexpensive, and therefore, inside the liquid pipe installed near the burner. Even when the absorbing liquid boils vigorously and a part of the liquid pipe is heated to 200 ° C. or higher, local corrosion hardly occurs and inconvenience due to corrosion hardly occurs.
[0027]
Therefore, it is possible to further reduce the size of the high-temperature regenerator by bringing the liquid pipe and the burner closer.
[Brief description of the drawings]
FIG. 1 is an explanatory view of a high-temperature regenerator as viewed from the side.
FIG. 2 is an explanatory view of a high temperature regenerator as viewed from above.
FIG. 3 is an explanatory view showing a main part of a high temperature regenerator.
FIG. 4 is an explanatory view showing a main part of a high temperature regenerator.
FIG. 5 is an explanatory view showing a main part of a high temperature regenerator.
FIG. 6 is an explanatory view showing a main part of a high temperature regenerator.
FIG. 7 is an explanatory view showing a main part of a high temperature regenerator.
FIG. 8 is an explanatory view showing a main part of a high temperature regenerator.
FIG. 9 is an explanatory view showing a main part of a high temperature regenerator.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Heating chamber 2 Steam generation part 3 Liquid circulation part 4, 4A, 4B, 4C, 4D Liquid pipe 4a, 4b Iron pipe 4a1 Stainless steel pipe 4b1 Through-hole 4b2 Weld metal 4c Small piece 4d Rod-like member 4e Linear member 4X 1st linear member Liquid tube group 4Y Second liquid tube group 5 Right side gap 6 Left side gap 7 Burner installation port 8 Exhaust port 9 Planar flame type burner 10 Combustion promoting space 11 Absorbing liquid header 12 Steam outlet 13 Absorbing liquid outlet 14 Back This material 15 Upper tube plate 16 Lower tube plate 17 Stainless steel weld metal 18/19 Outer plate 100 High temperature regenerator

Claims (1)

A steam generator disposed above the heating chamber, a liquid circulation section disposed below the heating chamber, and a plurality of metal liquids standing in the heating chamber and communicating with the steam generation section and the liquid circulation section A flame formed by the burner in the front of the heating chamber and facing the liquid pipe and installed sideways, and the burner generates absorbed liquid injected to a height exceeding the upper end of the liquid pipe. In the high-temperature regenerator of the absorption refrigerator that heats the generated combustion gas flowing in the heating chamber and evaporates and separates the refrigerant contained in the absorption liquid,
The liquid pipe is made of iron or cast iron, and the upper tube plate that forms the bottom of the steam generation part and the upper end of the liquid pipe is welded, and the ceiling of the liquid circulation part and the lower end of the liquid pipe is welded at least one of the lower tube plate, as different stainless steel or the like and the liquid pipe, upon heating in the burner, a liquid pipe made of the iron or cast iron, at least one of the tube plate consisting of the stainless steel The high-temperature regenerator has a configuration in which the anode and cathode of a primary battery using the absorbent as an electrolyte are used.

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