JP3001298U - Cremator - Google Patents

Abstract

(57) [Summary] [Purpose] In a cremation furnace in which a main combustion chamber and a re-combustion chamber for re-combusting exhaust gas from the main combustion chamber are installed in parallel, the combustion processing capacity of the main combustion chamber is improved. , Re-combustion process is reduced and exhaust gas is completely re-combusted. [Structure] A front ceiling 14 of a main combustion chamber 12 is raised, a flue portion 2 communicating with a recombustion chamber portion 3 is formed at a step with a rear ceiling 13, and a rear ceiling surface is provided on a rear wall of the main combustion chamber. Is provided with a secondary combustion air supply unit 19 that blows out along with the secondary combustion air so that the main combustion burner flame reaches the inner part of the combustion chamber when the secondary air is blown, and the volume of the main combustion chamber is increased (upper front portion).
Secondary combustion at.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a structure of a cremation furnace having a reburn chamber.

[0002]

[Prior art]

 The cremation furnace is equipped with a re-combustion chamber that re-combusts the exhaust gas after the main combustion of the cremation body has been performed in order to deodorize the exhaust gas. In other words, the main combustion chamber that houses the cremation object is equipped with a combustion burner that uses gaseous fuel or liquid fuel to burn the cremation object, and the unburned gas and black smoke generated are reburned in the re-combustion chamber. It is burned with the reburning burner.

Specifically, for example, a device provided with a flue portion which is provided in a horizontal direction and which connects a main combustion chamber, a front part and a rear part of the re-combustion chamber (Japanese Utility Model Publication No. 1-33936, Japanese Patent Laid-Open No. 64-36-). 6610), a device having a vertical flue portion on the back wall side (JP-A-3-1006), and a device having a vertical flue portion on the front surface (JP-A-2-195108). Etc. are known.

By the way, the cremation object has a combustible substance and a flame-retardant substance, and a large amount of exhaust gas requiring re-combustion is discharged from the main combustion chamber due to the rapid combustion of the combustible substance, and the re-combustion. If the processing capacity of the chamber is exceeded, the exhaust gas cannot be completely deodorized and smokeless.Therefore, combustion in the main combustion chamber is limited to the processing capacity in the recombustion chamber, which is an obstacle to shortening the cremation time. There is. Of course, if the capacity of the re-combustion chamber is improved, the above-mentioned problem can be solved, but it can also be solved by reducing the amount of exhaust gas that requires re-combustion treatment from the main combustion chamber. Therefore, as a means that has been widely used in the past, it is known that secondary combustion is performed by secondary air in the main combustion chamber to reduce the re-combustion process.

When the volume of the main combustion chamber is further increased, the residence time of the exhaust gas generated from the cremation body in the main combustion chamber becomes longer, and accordingly, the combustion (secondary combustion) of the exhaust gas is promoted. A cremation furnace in which the volume of the main combustion chamber is increased is disclosed in JP-A-3-1006 and JP-B-23937. In the cremation furnace, a smoke exhaust passage is provided in a front wall facing the main combustion burner or a rear wall portion provided with the main combustion burner, and a hanging wall is provided at an inlet of the smoke exhaust passage.

[0006]

[Problems to be solved by the device]

 If the volume of the main combustion chamber is increased as in the conventional device described above, the processing capacity of the main combustion chamber is increased and the burden of the re-combustion process is reduced. It is not preferable because the cremation furnace itself increases. Furthermore, when introducing exhaust gas into the smoke exhaust channel by the hanging wall, the flow of exhaust gas in the main combustion chamber may become turbulent, which makes combustion control complicated. In view of this, the present invention proposes a cremation furnace having a conventional horizontal smoke road, in which the combustion processing capacity of the main combustion chamber is improved without enlarging the entire furnace.

[0007]

[Means for Solving the Problems]

 The cremation furnace according to the present invention includes a main combustion chamber having a main combustion burner on the rear wall thereof and a recombustion chamber having a reburn burner for reburning exhaust gas from the main combustion chamber. In the cremation furnace that was set up, the front ceiling of the main combustion chamber was raised to form a flue part communicating with the re-combustion chamber at the step of the rear ceiling and the rear ceiling surface on the rear wall of the main combustion chamber. A secondary combustion air supply unit is provided to blow out along with the above.

[0008]

[Action]

 Combustion in the main combustion chamber is due to the main combustion burner.When the secondary air is blown along the rear ceiling and supplied, the flame of the main combustion burner is not immediately sucked into the smoke road and the front part of the main combustion chamber The exhaust gas returns to the smoke road by returning to the high front ceiling and enters the smoke road.Secondary combustion of the exhaust gas by the secondary air is performed near the front ceiling of the main combustion chamber immediately before entering the smoke road. The combustion capacity of the combustion chamber is improved. Next, the exhaust gas passes through the smoke road and is reburned by the burner for reburning in the reburning chamber.

[0009]

【Example】

 Next, an embodiment of the present invention will be described. The cremation furnace shown in the embodiment is composed of a main combustion chamber portion 1 and a re-combustion chamber portion 3 which are the furnace body having an inner wall formed with a refractory brick a, a ceramic block b, etc., and smoke between the two chambers. The road 2 is formed.

The main combustion chamber part 1 is provided with a main combustion chamber 12 having a fireproof opening / closing door 11 provided at a front part thereof, and the main combustion chamber 12 has a rear ceiling 13 less than 1 m from a rear wall and a front ceiling higher than the rear ceiling. It is provided with a partial ceiling 14 and the side wall and the front ceiling are formed of a heat-resistant ceramics block b surface excellent in heat reflection ability, and the rear ceiling 13 is formed of a fire-resistant brick a having a high heat storage capacity. A trolley 15 for mounting the casket A and a rail 16 for the trolley are laid, a primary combustion air supply unit 17 for cooling the trolley 15 is provided on the bottom surface, and a main combustion burner 18 and a rear portion are provided on the rear wall. An air supply nozzle 19 for secondary combustion that blows along the surface of the ceiling 13 is provided.

The flue portion 2 is provided inside a step portion between the front ceiling 14 and the rear ceiling 13 of the main combustion chamber portion 1, and the flue inlet 21 is opened at the rear end of the front ceiling 14. The flue 22 is formed on the back surface of the rear ceiling 13, and the upper portion of the rear wall is opened to communicate with the reburn chamber 3. The re-combustion chamber section 3 is arranged immediately above the main combustion chamber section 1. The re-combustion burner 31 is arranged on the rear wall surface, and the partition section 33 having a large exhaust gas passage hole 32 is used for the rear combustion chamber section 3. It is divided into a combustion chamber 34 and a front re-combustion chamber 35, and a side wall and a ceiling of the front re-combustion chamber 35 are formed of ceramic blocks b, and a smoke exhaust passage 36 is connected to the front ceiling.

Then, the trolley 15 on which the casket is placed is placed in the main combustion chamber 12, and cooling air to the trolley 15 which becomes the primary air A for combustion from the air supply part 17 and a secondary air from the secondary air supply part 19 are supplied. While the secondary air B is being supplied to the main combustion chamber 12, the main combustion burner 18 and the reburning burner 31 are ignited to start combustion and complete combustion of the cremation object.

The combustion control in the main combustion chamber 12 is performed based on the fuel supply amount of the main combustion burner 18 and the supply control of the primary air and the secondary air. Specifically, the combustion control is performed at the start of combustion. If it is easy to do, it may burn temporarily and a large amount of exhaust gas to be treated may be emitted, which may exceed the treatment capacity in the re-combustion chamber 3. Therefore, reduce the primary air amount A and reduce the secondary air amount B. To increase. Then, the temporary excess combustion of combustible substances at the start of combustion can be suppressed, and the secondary air B is blown out along the rear ceiling 13 to be supplied. Therefore, in the volume increasing portion near the front ceiling 14. Secondary combustion is performed by the contact between the exhaust gas and the secondary air B, and the exhaust gas treatment in the re-combustion chamber section 3 can be completed (see FIG. 4).

When the combustion further progresses, the supply amount of the temporary air A is increased to burn the flame-retardant material, and the secondary air B is not immediately sucked into the smoke road because the flame of the main combustion burner 18 is not immediately sucked into the smoke road. It acts to reach the front of the baking chamber 12 (see FIG. 5). Further, since the ceramic block b having an excellent heat reflecting function is adopted for the side wall portion of the main combustion chamber 12 and the front ceiling 14, the main combustion chamber can be quickly heated and cooled, and the rear ceiling 13 can store heat. By adopting a large refractory brick a, the temperature rise of the secondary air at the start of combustion is limited to suppress the abnormal temperature rise in the main combustion chamber 12 at the initial combustion which is combustible matter combustion, and after the heat storage, It contributes to the temperature rise of the secondary air and contributes to the secondary combustion in the main combustion chamber 12.

[0015]

[Effect of device]

 As described above, according to the present invention, in the cremation furnace having the reburn chamber, the front ceiling of the main combustion chamber is raised, and the flue part communicating with the reburn chamber is formed in the step portion with the rear ceiling. In addition, the rear wall of the main combustion chamber is provided with a secondary combustion air supply unit that blows out along the rear ceiling surface.There is a flue part that connects the front part of the main combustion chamber and the rear part of the re-combustion chamber. Compared to the cremation furnace equipped with it, it was possible to increase the volume of the main combustion chamber without increasing the volume of the entire furnace, improving the combustion processing capacity of the main combustion chamber and adding secondary air to the rear part. By supplying by blowing along the ceiling, the flame of the main combustion burner is not immediately sucked into the smoke road and reaches the front part of the main combustion chamber to achieve complete incineration of the cremation body and increase the combustion chamber. Part of the secondary combustion of exhaust gas by secondary air, and the burden of combustion processing in the re-combustion chamber Reduce to, those that achieves complete combustion of the exhaust gas.

[Brief description of drawings]

FIG. 1 is a simplified side sectional view of a cremation furnace according to an embodiment of the present invention.

FIG. 2 is a front and rear cross-sectional view for explaining the furnace body constituent member.

FIG. 3 is a front and rear cross-sectional view for explaining the furnace body constituent member.

FIG. 4 is an explanatory diagram of the same combustion state (initial combustion).

FIG. 5 is an explanatory view of the same combustion state (main combustion).

[Explanation of symbols]

 1 Main Combustion Chamber Section 13 Rear Ceiling 14 Front Ceiling 18 Main Combustion Burner 19 Secondary Air Supply Section 2 Flue Section 3 Recombustion Chamber Section 31 Recombustion Burner

Claims (3)

[Scope of utility model registration request] 1. A cremation furnace in which a main combustion chamber having a main combustion burner disposed on a rear wall thereof and a reburn chamber having a reburn burner for reburning exhaust gas from the main combustion chamber are arranged in parallel. In this case, the front ceiling of the main combustion chamber is raised, a flue part communicating with the re-combustion chamber is formed at the step with the rear ceiling, and the air is blown out along the rear ceiling surface to the rear wall of the main combustion chamber. A cremation furnace characterized by being provided with an air supply for secondary combustion. 2. The cremation furnace according to claim 1, wherein the rear ceiling of the main combustion chamber is less than 1 m. 3. The cremation furnace according to claim 1 or 2, wherein:
A cremation furnace characterized in that a side wall portion and a front ceiling portion of the main combustion chamber are covered with a ceramic body having a heat reflecting function, and a rear ceiling constituting a flue portion is formed of a heat storage member.