JP2000234721A - Hot water boiler - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce generation of bad smell at the time of quenching irrespective of the combustion rate by inserting, from inside of a flue to a combustion chamber, a baffle plate supporting a catalyst for subjecting uncombusted gas components to adsorption and combustion. SOLUTION: When combustion gas is flowed from a combustion chamber 2, uncombusted gas components which have been flowed to a flue 3 without being completely combusted at the time of quenching, are activated and combusted by a platinum catalyst held by a baffle plate 14 which is inserted into the flue 3 to weaken the smell. In the case of minimum combustion operation, the temperature of large percentage of exhaust gas does not reach the temperature for the platinum catalyst to activate and combust the uncombusted gas, resulting in exhausting uncombusted gas at the time of quenching. However, as a flat plate 17 is protruded to the inside of the combustion chamber 2, heat in the chamber 2 is absorbed and transferred to raise the temperature of the entire baffle plate 14 and the platinum catalyst activates and combusts the uncombusted gas components with the transferred heat and the exhaust gas heat. Thus the smell ascribable to the uncombusted gas is reduced even when a burner is quenched.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hot water boiler for heating water by burning liquid fuel such as petroleum.

[0002]

2. Description of the Related Art Conventionally, this type of hot water boiler is, for example,
A combustion chamber and a flue are formed in the can body containing the heated hot water, and the combustion gas generated by the combustion of the burner is discharged to the outside of the can body through the combustion chamber and the flue. It is designed to exchange heat with the hot water inside the can.

[0003] In particular, exhaust gas generated at the time of fire extinguishing contains unburned gas that is not completely burned, and this unburned gas causes a bad smell outside the machine. In order to burn this unburned gas, a component carrying a catalyst in a flue was provided, and the unburned gas was activated by the catalyst, burned, and discharged to the outside.

[0004]

However, in a hot water boiler provided with a burner capable of changing the amount of combustion, the temperature of exhaust gas is low in the case of minimum combustion at the time of fire extinguishing, and the temperature is low enough to activate unburned gas by a catalyst. Since it did not reach, the unburned gas was directly discharged outside.

The present invention has been made in view of such circumstances, and has as its object to provide a hot water boiler that can reduce the generation of offensive odors when extinguishing a fire regardless of the amount of combustion. .

[0006]

According to the first aspect of the present invention,
A burner and a can body were built in the box-shaped main body, a combustion chamber and a flue were formed in the can body containing hot water, and the combustion gas generated by burning the burner was inserted into the combustion chamber and the baffle plate. A catalyst that adsorbs and burns unburned gas components in a combustion gas to the baffle plate in a hot water boiler configured to exchange heat between a combustion gas and hot water in the can while discharging the combustion gas to the outside of the can through a flue. And the baffle plate is inserted from the inside of the flue to the inside of the combustion chamber. As a result, a part of the baffle plate can absorb and conduct the heat in the combustion chamber to increase the temperature of the entire baffle plate and also increase the contact area with the unburned gas without deteriorating the thermal efficiency. .

According to a second aspect of the present invention, in the hot water boiler according to the first aspect, the baffle plate carries a catalyst for adsorbing and burning unburned gas components at least in a portion located in the flue.

According to a third aspect of the present invention, in the hot water boiler according to the first aspect, a smoke collector for collecting the combustion gas flowing out of the flue and guiding the collected combustion gas to an exhaust chimney is detachably mounted on a can body.
The baffle plate can be inserted and removed from the removed smoke collector side.

[0009]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a front view of a hot water boiler according to an embodiment of the present invention, which is partially cut away. FIG.
FIG. 2 is an enlarged view of a part of the can body shown in FIG.

As shown in FIGS. 1 and 2, a hot water boiler 1 according to the present invention has a box-shaped main body casing 15, and an upper part of the main body casing 15 has a can body 4 containing hot water. The combustion chamber 2 and a number of horizontal flues 3 connected to the combustion chamber 2 are formed in the can body 4. In the vicinity of the can 4, a cistern tank (not shown), a circulation pump 5, and the like are provided as a hot water circulation device. A water pipe 6 is connected to these hot water circulation devices,
By driving the circulation pump 5, the hot water in the water pipe 6 can be circulated.

On the other hand, on the right side of the can 4 is a vaporizing burner 7 capable of varying the amount of combustion. The flame of the burner 7 is guided to the combustion chamber 2 connected to the burner 7. Reference numeral 8 denotes a blower attached to the burner 7 for supplying combustion air. In addition, an oil leveler, an electromagnetic pump, a fuel supply pipe and the like (not shown) are provided below the burner 7 as a fuel supply device, and the fuel in the oil leveler is supplied to the burner 7 via the fuel supply pipe.

Further, a smoke collector 12 for collecting the combustion gas from the flue 3 and guiding it to an exhaust chimney 11 is detachably connected to the can body 4. The smoke collector 12 is screwed (not shown) to the can 4 via a packing 13, and the smoke collector 12 is
The baffle plate 14 is attached to each flue 3 with the
Are removably inserted.

An inspection opening (not shown) is provided in a part of the side wall of the main body casing 15 facing the smoke collector 12.
The cover 16 is detachably screwed to the main body casing 15 so as to cover the inspection opening.
By removing the lid 16 from the main casing 15, the smoke collector 12 can be removed through the opening for inspection, maintenance and inspection of the stack 3 can be performed, and the baffle plate 14 can be replaced.

FIG. 3 is an enlarged view showing the baffle plate of the present invention and a flue into which the baffle plate is inserted. The flue 3 is constituted by a cylindrical metal pipe, and the baffle plate 14 inserted into the flue 3 has a length longer than the length of the flue 3 and its tip protrudes into the combustion chamber 2 and has a thickness. Is about 1mm,
It is made of a heat-resistant stainless steel plate whose width is slightly smaller than the inner diameter of the flue 3. The overall shape of the baffle plate 14 includes a flat plate portion 17, a wavy portion 18, and a handle portion 19, and the wavy portion 18 is formed between the flat plate portion 17 and the handle portion 19. The wavy portion 18 has been subjected to a zigzag bending process,
Although the width of the zigzag is formed to be substantially the same as the inner diameter of the flue 3, and a large number of granular platinum catalysts 22 that adsorb and burn unburned gas are baked on the surface of the wavy portion 18. The platinum catalyst 22 may be supported on the surface of the flat plate portion 17. The corrugated portion 18 is formed on the baffle plate 14 so as to be located in the flue 3, the flat portion 17 is flat, and is located in the combustion chamber 2 from the end of the flue 3, and 2 conducts the heat to the wavy portion 18.
The handle portion 19 is formed at the end of the baffle plate 14 opposite to the flat plate portion 17, and the width thereof is formed wider than the wavy portion 18.
The baffle plate 14 is easily inserted and removed.

Since the hot water boiler according to the present invention has the above-described configuration, the fuel vaporized by the burner 7 is mixed with air and burns, the flame flows into the combustion chamber 2 and the combustion gas is discharged into the flue. 3 and the smoke stack 12 through the exhaust chimney 11
Is discharged from At this time, the combustion chamber 2 is 1200 to 1 degree Celsius.
Heated to 300 degrees, the flue 3 on the combustion chamber 2 side
The temperature is raised to about 00 degrees, and the temperature gradually decreases as heat exchanges warm water toward the smoke collector 12 side. The exhaust gas thus generated from the flame of the combustion chamber 2 flows through the flue 3 formed in the can body 4 while the baffle plate 14
As a result, the gas flows toward the smoke collector 12 while evenly hitting the inner wall of the flue 3, and during this time, the heat of the exhaust gas transfers the heat to the baffle plate 14 and the inner wall of the flue 3. When the burner 7 performs the standard combustion operation, the temperature distribution of the exhaust gas in the flue 3 is, for example, 1000 to 200 degrees Celsius from the rightmost combustion chamber 2 to the leftmost smoke collector 12.

In this way, the smoke collector 12 is removed from the combustion chamber 2.
Since the platinum catalyst 22 is carried on the baffle plate 14 inserted into each flue 3 when the combustion gas flows toward the flue 3, the baffle plate 14 is not completely burnt in the combustion chamber 2 at the time of fire extinguishing. The unburned gas component that has flowed in is 300 to 800 degrees Celsius.
Activated by the platinum catalyst 22 and burned in the active temperature range, thereby reducing the odor caused by unburned gas.

When the burner 7 performs the minimum combustion operation, the temperature distribution of the exhaust gas ranges from 1000 to 120 degrees Celsius from the rightmost combustion chamber 2 to the leftmost smoke collector 12. At this temperature, there are many portions where the platinum catalyst 22 does not reach the temperature at which the unburned gas is activated and burned, and most of the unburned gas is discharged to the outside as it is when the fire is extinguished during the minimum combustion operation. In the baffle plate 14 of the present invention, since the flat plate portion 17 protrudes into the combustion chamber 2, even when such a minimum combustion is performed,
7 absorbs and conducts the heat of the combustion chamber 2 to increase the temperature of the entire baffle plate 14. Utilizing the conduction heat and the heat of the exhaust gas, the platinum catalyst 22 activates and burns the unburned gas components in the exhaust gas. As a result, even when the burner 7 is extinguished during the minimum combustion operation, the odor caused by the unburned gas is reduced.

The baffle plate 14 extending into the combustion chamber 2
The flat plate portion 17 functions to absorb and conduct the heat of the combustion chamber 2, but does not affect the combustion performance of the burner 7 and does not adversely affect the heat exchange performance.

Further, the capacity of the platinum catalyst 22 baked and supported on the baffle plate 14 may be reduced over a long period of use. In this case, the lid 16 and the smoke collector 12 of the main casing 15 are removed, and the baffle plate 14 is removed so that inspection and replacement can be performed. In this case, the baffle plate 14 has a wide handle portion 19 formed at one end as described above, and the handle portion 19 facilitates the insertion and removal of the baffle plate 14. In addition to simplifying the operation of inserting 14, errors in insertion direction can be prevented. If the lengths of the baffle plates 14 are the same, parts can be shared and the operation of inserting the baffle plates 14 can be simplified.

FIG. 4 is an enlarged view showing another embodiment of the present invention, in which a part of a can body is cut away. In this embodiment, the length of the corrugated portion 18 is about half the length of the flue 3, and a flat plate portion 17 protruding into the combustion chamber 2 is formed ahead of the corrugated portion 18. Thereby, the heat of the combustion chamber 2 can be absorbed and conducted to the corrugated portion 18.

Although the present invention has been described based on the embodiment, the present invention is not limited to this.

[0023]

According to the first and second aspects of the present invention,
Since a baffle plate carrying a catalyst that adsorbs and burns unburned components is inserted from the flue to the combustion chamber, a part of the baffle plate protruding into the combustion chamber absorbs heat from the combustion chamber and conducts heat to the entire baffle plate. It is possible to raise the temperature, and not only when extinguishing with a large amount of combustion but also when extinguishing with a small amount of combustion, the unburned gas can be activated by a catalyst and burned. Irrespective of this, the generation of offensive odor at the time of fire extinguishing can be efficiently reduced.

According to the third aspect of the present invention, a smoke collecting plate for collecting the combustion gas flowing out of the flue and leading it to the exhaust chimney is detachably mounted on the can body, and the baffle plate is removed from the collected collecting plate. The baffle plate serving as a deodorizing device can be easily replaced when the catalyst loses its deodorizing effect due to long-term use because it can be operated from the smoke board side.

[Brief description of the drawings]

FIG. 1 is a front view in which a part of a hot water boiler according to the present invention is cut away.

FIG. 2 is a front view of the hot water boiler shown in FIG.

FIG. 3 is an enlarged view showing a baffle plate of the present invention and a flue into which the baffle plate is inserted.

FIG. 4 is a front view of another embodiment of the present invention in which a can body of a hot water boiler is partially cut away.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Hot-water boiler 2 Combustion chamber 3 Flue 4 Can body 7 Burner 11 Exhaust chimney 12 Smoke collector 14 Baffle board 15 Body casing

 ──────────────────────────────────────────────────続 き Continuing from the front page (72) Inventor Shinichiro Yanagida 2-5-5 Keihanhondori, Moriguchi-shi, Osaka Sanyo Electric Co., Ltd. (72) Haruo Kato 2-5-5 Keihanhondori, Moriguchi-shi, Osaka No. 5 Sanyo Electric Co., Ltd. F term (reference) 3K070 DA06 DA25

Claims (3)

[Claims] 1. A burner and a can body are built in a box-shaped main body, a combustion chamber and a flue are formed in a can body containing hot water, and a combustion gas generated by combustion of the burner is burned into the combustion chamber and a baffle. In a hot water boiler configured to exchange heat between combustion gas and hot water in a can body while discharging the combustion gas out of the can body through a flue into which a plate is inserted, an unburned gas component in the combustion gas is contained in the baffle plate. A hot water boiler, which carries a catalyst that adsorbs and burns the fuel, and inserts the baffle plate from inside the flue to inside the combustion chamber. 2. The hot water boiler according to claim 1, wherein the baffle plate carries a catalyst for adsorbing and burning unburned gas components at least in a portion located in the flue. 3. A smoke collecting plate for collecting the combustion gas flowing out of the flue and guiding it to an exhaust chimney is detachably mounted on a can body, and the baffle plate can be inserted and removed from the removed smoke collecting plate side. 2. The hot water boiler according to claim 1, wherein: