JPH11182976A - High temperature regenerator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To detect dropping of a heat insulating material constituting a shielding member in the early stage by disposing a temperature fuse, as means for detecting dropping of the heat insulating material, at a specified position of the shielding member. SOLUTION: A temperature fuse 20 is fixed to the inner circumferential surface of the casing 17 of a shielding member 7'. The temperature fuse 20 is made by coating a metal wire, e.g. an aluminum wire or a tin wire, being blown out at a specified temperature with a heat resistance insulating tube. Combustion gas from a burner 11 passes through a flue to strike against the shielding member 7'. During normal operation, a heat insulating maternal 16 of the shielding member 7' shields the combustion gas and the temperature fuse 20 does not reach the blow-out point. It the heat insulating material 16 drops, the combustion gas heats up the temperature fuse 20 which is thereby blown out. Blow-out of the temperature fuse 20 is detected by the controller for high temperature reheater and the operation thereof is interrupted before delivering an alarm.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a high temperature regenerator used in a furnace tube liquid heating apparatus, for example, an absorption refrigerator.

[0002]

2. Description of the Related Art FIGS. 7 and 8 are views showing an example of the structure of a furnace tube high-temperature regenerator used for heating an absorption liquid in an absorption refrigerator. In the figure, 1 is a cylindrical furnace tube, 3 is a cylindrical can body forming a jacket surrounding the outside of the furnace tube 1, and these are integrally formed with a front wall 4 and a liquid space 5 therein. The furnace body 6 has a double structure having the following structure. On the rear side of the furnace main body 6, a rear wall 14 on the other end side of the combustion chamber 2 is formed integrally with the furnace main body 6.

A plurality of smoke tubes 8 are arranged in the liquid space 5c at the ceiling of the combustion chamber 2 along the longitudinal direction of the furnace tube 1, and one end of each of the smoke tubes 8 is provided in a rear smoke chamber 9 on the rear side of the combustion chamber. The other end is open to a front smoke chamber 10 provided outside the front wall 4. An opening 15 is formed in the rear wall 14 at a position facing the smoke tube 8, and a flat shielding member 7 that covers the opening 15 is detachably attached by appropriate fastening means. A burner 11 for sending a combustion flame into the combustion chamber 2 is provided on the front wall 4. Reference numeral 12 denotes a plate that covers the liquid space 5c, and reference numeral 13 denotes a chimney provided in the front smoke chamber 10.

The liquid spaces 5a and 5b between the can body 3, the furnace tube 1 and the front wall 4 are jackets for cooling and heat exchange of these parts, and the liquid spaces 5a and 5b It communicates with the space 5c. The rear wall 14 has a double structure, and is connected to the liquid space 5 a of the furnace body 6.
d is formed. The liquid spaces 5a to 5d are connected to, for example, pipes for transferring liquid (absorbing liquid) with an absorption refrigerator.

FIG. 8 is a view taken along the line DD of FIG. As shown in the figure, the furnace tube 1 is formed in a substantially circular cross section, the can body 3 is formed in a vertically long elliptical shape, and the furnace tube 1 is arranged to be deviated downward with respect to the can body 3. I have. Opening 15
Is horizontally long according to the arrangement of the flue 8 and the opening 1
5 is formed in a pentagon so that the lower side is convex downward. The angle θ of the bottom of the pentagon is set to such an extent that no stagnation occurs when the liquid rises by convection in the liquid space 5 d below the opening 15.

FIG. 9 is a view showing the structure of the shut-off member 7. FIG. 9 (a) is a front view of the shut-off member (viewed from the combustion chamber 2 side), and FIG. 9 (b) is FIG. 9 (a). FIG.
The blocking member 7 has a structure in which a plurality of heat insulating materials 16 are stacked and accommodated in a plate shape in a casing 17.
6 is a direction orthogonal to the longitudinal direction of the furnace tube 1. That is, the structure is such that the surface of the blocking member 7 in contact with the combustion gas becomes the tomographic surface (laminated surface) of the heat insulating material 16. The heat insulating material 16 is fixed to the casing 17 by stat bolts 18.

In the conventional high-temperature regenerator, the burner 11
First, the combustion gas generated by heating the liquid in the liquid spaces 5a to 5d around the furnace tube 1 in the furnace tube 1 mainly by radiant heat transfer, then enters the smoke tube 8 through the rear smoke chamber 9, and then enters the liquid space 5c Heat the liquid. In the liquid spaces 5a to 5d,
Heat is transferred by convection heat transfer, and the heated liquid rises sequentially and is sent to an absorption refrigerator or the like by a pipe connected to the plate 12.

The temperature of the combustion gas is about 1500 in the combustion chamber 2.
The temperature is about 900 ° C. in the rear smoke chamber 9 and about 250 ° C. in the front smoke chamber 10 at the outlet of the smoke tube 8. The combustion gas is discharged from the chimney 13 to the outside through the front smoke chamber 10. When inspecting and cleaning the smoke tube 8, the fastening means is released from the rear wall 14 and the shielding member 7 covering the opening 15 is removed.

[0009]

However, the high-temperature regenerator having the above-mentioned structure has the following problems. Since the falling off of the heat insulating material 16 of the blocking member 7 is not detected, there is a risk that high-temperature combustion gas will flow out when burning after dropping.

[0010] In addition, a thermostat was sometimes attached to detect dropout, but since it was a point detection,
If dropping occurs at a location away from the mounting position, it cannot be detected,
As described above, there was a risk of outflow of the combustion gas.

The present invention has been made in view of the above points, and an object of the present invention is to provide a high-temperature regenerator capable of early detecting even if the heat insulating material 16 falls off.

[0012]

In order to solve the above-mentioned problems, the invention according to claim 1 comprises a cylindrical furnace tube, and one end of the furnace tube arranged substantially in parallel with the furnace tube through a smoke chamber at one end. A cylindrical canister connected to one end, a cylindrical can body arranged so as to surround the furnace tube and the smoke tube, and combustion gas from a combustion chamber in the furnace tube flows from one end of the furnace tube into the smoke chamber. A high-temperature regenerator configured to invert and flow through a smoke tube to a chimney, and to heat and concentrate an absorbing solution contained between a can body, a furnace tube and a smoke tube, and the outer wall of a smoke chamber in which combustion gas is inverted. In a high-temperature regenerator having a configuration in which an opening is provided and the opening is covered with a detachable shielding member, as a detecting means for detecting a drop of a heat insulating material constituting the shielding member, a temperature is set at a predetermined position of the shielding member. A fuse is provided.

The invention described in claim 2 is the first invention.
In the invention described in (1), the thermal fuse is a thermal fuse in which a plurality of thermal fuses are connected in series or a long thermal fuse.

[0014]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a view showing a configuration of a shielding member 7 'that covers an opening 15 of a rear smoke chamber 9 of the high-temperature regenerator according to the present invention. FIG. 1A is a front view of the shielding member 7' (combustion of FIG. 7). 1 (b) is a view from the side of the chamber 2), and FIG.
FIG. The configuration of the high-temperature regenerator according to the present invention is substantially the same as that of the above-described conventional high-temperature regenerator, and a description thereof will be omitted. In FIG. 1A, reference numeral 15 surrounded by a two-dot chain line indicates an opening.

The shielding member 7 ′ is connected to the opening 15 of the rear smoke chamber 9.
It has a structure in which a plurality of slightly larger plate-like heat insulating materials 16 are laminated, and the laminating direction coincides with the longitudinal direction of the furnace tube 1. That is, the surface of the shielding member 7 ′ in contact with the combustion gas is made to be the plane of the heat insulating material 16 on the inner side (the rear smoke chamber 9 side). The laminated body of the heat insulating material 16 is housed in a casing (made of iron) 17, and one end is fixed by a stud bolt 18 and a fastener 19 fixed to an inner wall of the casing 17.

A temperature fuse 20 is attached to the inner peripheral surface of the casing 17 of the shielding member 7 '. The thermal fuse 20 has a structure in which a metal wire that melts at a predetermined temperature, for example, an aluminum wire or a tin wire is covered with a heat-resistant insulating tube. The thermal fuse 20 is long and functions as a fuse over the entire circumference. The end 20a of the thermal fuse 20 is led to the outside through the casing 17, and is connected to a control device (not shown) of the high-temperature regenerator.

The combustion gas generated by the burner 11 passes through the furnace tube 1 and collides with the shielding member 7 ′ in the rear smoke chamber 9. During normal operation, the heat insulating material 16 of the shielding member 7 'shields the combustion gas and does not reach the temperature at which the thermal fuse 20 is disconnected. When the heat insulating material 16 falls off, the combustion gas heats the thermal fuse 20, so that the thermal fuse 20 is blown. The control device of the high-temperature regenerator detects that the thermal fuse 20 has blown, stops the operation of the high-temperature regenerator,
Raise an alarm.

FIG. 2 is a view showing another example of the structure of the shielding member 7 'for covering the opening 15 of the rear smoke chamber 9 of the high-temperature regenerator of the present invention, and FIG. 2 (a) is a front view of the shielding member 7'. FIG. 2B shows a side view (view from the combustion chamber 2 side). In this shielding member 7 ′, the thermal fuse 20 is attached along the outer peripheral surface of the casing 17. When the heat insulating material 16 falls off in the shielding member 7 ′ having this structure, the heat of the combustion gas is transmitted to the casing 17, and the thermal fuse 20 is heated to blow out.

FIG. 3 is a view showing another configuration example of the shielding member 7 'for covering the opening 15 of the rear smoke chamber 9 of the high-temperature regenerator of the present invention, and FIG. 3A is a front view of the shielding member 7'. 3 (b) is a view taken in the direction of arrows BB in FIG. 3 (a), and FIG. 3 (c) is an enlarged view of a thermal fuse mounting portion. As shown in FIG.
The mounting position of 0 is substantially the same as that of FIG. 2, but the temperature shoe 20 is fixed by a pin 21 fixed to the inner peripheral surface of the casing.

FIG. 4 is a view showing another example of the structure of the shielding member 7 'for covering the opening 15 of the rear smoke chamber 9 of the high-temperature regenerator of the present invention, and FIG. 4 (a) is a front view of the shielding member 7'. FIG. 4B is a side view (view from the combustion chamber 2 side). In this shielding member 7 ′, the temperature shoes 20 are attached through a pipe 22 fixed to the outer peripheral portion of the casing 17.

FIG. 5 is a view showing another example of the structure of the shielding member 7 'for covering the opening 15 of the rear smoke chamber 9 of the high-temperature regenerator of the present invention, and FIG. 5 (a) is a front view of the shielding member 7'. 5 (b) is a view as viewed from the combustion chamber 2 side, and FIG. The heat insulating material 16 of the present shielding member 7 ′ is a castable refractory (for example, a refractory cement made of SiO ₂ + Al ₂ O ₃ ). The heat insulating material 16 is constituted by disposing a large number of anchor metals (iron making) 23 inside a casing 17 and pouring a castable refractory into the casing 17 to solidify it.

Before the castable refractory is poured, the temperature fuse 20 is arranged in a meandering manner in the casing 17 so that the castable refractory is poured.
It is embedded in the heat insulating material 16. Further, the thermal fuse 20 may not be embedded in the heat insulating material 16 which is a castable refractory, but may be provided outside the casing 17 as shown in FIG.

In the above embodiment, the thermal fuse 20 has a long shape. However, the present invention is not limited to a fin, and is constituted by connecting a plurality of thermal fuses 20 in series. But it is good.

[0024]

As described above, according to the present invention, the following excellent effects can be obtained. By installing a plurality of thermal fuses or a long thermal fuse connected in series at a predetermined position of the shielding member, even if the heat insulating material falls off, it is possible to detect the falling off at an early stage by fusing the thermal fuse. Therefore, measures for preventing the outflow of the high-temperature combustion gas to the outside, such as stopping the operation of the high-temperature regenerator, can be taken at an early stage.

[Brief description of the drawings]

FIG. 1 is a diagram showing a configuration example of a shielding member that covers an opening of a rear smoke chamber of a high-temperature regenerator according to the present invention. FIG. 1A is a front view of the shielding member, and FIG. It is an AA arrow line view of a).

FIG. 2 is a view showing another configuration example of a shielding member that covers an opening of a rear smoke chamber of the high-temperature regenerator according to the present invention. FIG. 2 (a) is a front view of the shielding member, and FIG. FIG.

3A and 3B are diagrams showing another configuration example of a shielding member that covers an opening of a rear smoke chamber of the high-temperature regenerator according to the present invention. FIG. 3A is a front view of the shielding member, and FIG. FIG.
FIG. 3C is an enlarged view of the thermal fuse mounting portion.

4A and 4B are diagrams showing another configuration example of a shielding member that covers an opening of a rear smoke chamber of the high-temperature regenerator according to the present invention. FIG. 4A is a front view of the shielding member, and FIG. FIG.

5A and 5B are diagrams illustrating another configuration example of a shielding member that covers an opening of a rear smoke chamber of the high-temperature regenerator according to the present invention. FIG. 5A is a front view of the shielding member, and FIG. It is a CC arrow view of 5 (a).

FIG. 6 is a view showing another configuration example (a view taken in the direction of the arrows CC in FIG. 5A) of the shielding member that covers the opening of the rear smoke chamber of the high-temperature regenerator of the present invention.

FIG. 7 is a diagram showing a configuration example of a furnace tube high-temperature regenerator.

FIG. 8 is a view as viewed in the direction of arrows DD in FIG. 7;

9A and 9B are views showing a shielding member that covers an opening of a rear smoke chamber of a conventional high-temperature regenerator, FIG. 9A is a schematic diagram of the shielding member, and FIG. 9B is FIG. 9A. FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Furnace cylinder 2 Combustion chamber 3 Can body 4 Front wall 5 Liquid space 6 Furnace body 7, 7 'Shielding member 8 Smoke tube 9 Rear smoke chamber 10 Front smoke chamber 11 Burner 12 Plate 13 Chimney 14 Rear wall 15 Opening 16 Thermal insulation Material 17 Casing 18 Stud bolt 19 Stopper 20 Thermal fuse 21 Pin 22 Pipe 23 Anchor metal

Claims (2)

[Claims] 1. A tubular furnace tube, a tubular smoke tube arranged substantially in parallel with the furnace tube and having one end connected to one end of the furnace tube via a smoke chamber, so as to surround the furnace tube and the smoke tube. A cylindrical can body arranged therein, wherein combustion gas from a combustion chamber in the furnace tube is inverted from one end of the furnace tube in the smoke chamber, and flows to the chimney through the smoke tube; A high-temperature regenerator for heating and concentrating an absorbing solution contained between the can body and the furnace tube and the smoke tube, wherein an opening is provided on an outer wall of the smoke chamber where the combustion gas is inverted, and the opening is detachably attached. In a high-temperature regenerator configured to be covered with a shielding member, a high-temperature regeneration unit is provided with a temperature fuse at a predetermined position of the shielding member as a detection unit for detecting a drop of a heat-insulating material constituting the shielding member. vessel. 2. The high temperature regenerator according to claim 1, wherein
A high-temperature regenerator wherein the thermal fuse is a thermal fuse in which a plurality of thermal fuses are connected in series or a long thermal fuse.