JPH11153308A - Crematory furnace - Google Patents

Abstract

PROBLEM TO BE SOLVED: To incorporate necessary oxygen into discharging gas and discharge combustion gas under the condition of no smoke and no smell, by a method wherein a nozzle, discharging gas for promoting the combustion of unburnt gas from a main combustion chamber side toward a recombustion chamber, is provided in a flue. SOLUTION: A flue 9 is provided so as to be established upward from an open port 10 at the upper part of rear side near a main combustion burner 6 for a main combustion chamber 2 and extended so as to be intersected with flame discharged out of a re-combustion burner 7. An upward nozzle 13 is provided in the open port 10 of the flue 9 so as to be penetrated from the outer surface of rear wall 14 of a furnace body 1 into the inside of the furnace while outdoor air is supplied forcibly by a fan into the nozzle 13. According to this method, a pressure in the main combustion chamber is brought into the condition of a negative pressure without increasing the pressure at all times, to reduce the discharging amount of air from the main combustion burner and the recombustion burner whereby noise from the burners can be reduced and working atmosphere can be improved.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to cremation in a main combustion chamber, unburned gas generated during the cremation is sent to a reburning chamber through a flue, and the unburned gas is reburned cleanly in the reburning chamber. It relates to a cremation furnace that discharges to the outside world.

[0002]

2. Description of the Related Art The main combustion chamber of a cremation furnace is made to have a negative pressure to prevent the combustion generated gas from leaking out of the furnace during cremation, and conversely absorb outside air to contribute to the combustion of combustible combustible gas. It has become.

[0003]

However, a large amount of combustible gas is generated at the beginning of cremation, and the gas usually increases the pressure in the main combustion chamber and conversely decreases the amount of outside air sucked. At this time, a large amount of air (oxygen) is needed, but the amount of air (oxygen) is reduced, so unburned gas is generated as black smoke, and the combustion burden in the reburning chamber increases, resulting in incomplete combustion. In some cases, it was discharged into the open air. Therefore,
When a large amount of unburned gas is generated during the initial stage of cremation, forcibly flowing air into the main combustion chamber promotes combustion, but the pressure of the main combustion chamber increases due to the outside air that flows in The gas leaked out of the furnace, and the required amount of air could not be supplied.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and provides a gas necessary for burning unburned gas without increasing the pressure in the main combustion chamber, thereby making it possible to supply a necessary gas to the gas discharged from the reburning chamber. An object of the present invention is to allow oxygen to be released in a smokeless and odorless state.

[0005]

SUMMARY OF THE INVENTION According to the present invention, there is provided a cremation furnace having a main combustion chamber, a reburning chamber, and a flue connecting the both chambers, which promotes combustion of unburned gas in the flue. A nozzle for discharging the gas to be generated from the main combustion chamber side toward the re-combustion chamber side.

[0006] There are two types of means for providing the above-mentioned flue, one of which is provided from the front side of the main combustion chamber of the crematory furnace into and out of the coffin, and communicates with the reburning chamber;
Another type is of a type that is provided upright from the rear side of the main combustion chamber, that is, the side where the main combustion burner is provided, and communicates with the reburning chamber. The present invention can be adopted in both of the above embodiments. The gas that promotes the combustion of the unburned gas is most preferably external air from the viewpoint of maintenance costs and safety, and may be oxygen. Further, when the gas is released from the nozzle, the gas is forcibly or spontaneously flowing due to the suction force of the reburning chamber. It should be noted that the present invention is also applied to both the trolley type and the Rostor type cremation furnaces.

[0007]

As described above, since the gas is emitted toward the flue, especially when a large amount of unburned gas is generated in the early stage of the crematory, the gas is forced into the flue to flow into the flue. The unburned gas mixes with the gas to promote combustion.Moreover, the gas does not flow into the main combustion chamber, but the gas in the main combustion chamber is sucked into the flue, and the furnace pressure is reliably reduced. The pressure can be maintained.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment according to the present invention will be described. As shown in FIG. 1, a main combustion chamber 2 is provided at a lower portion of a furnace body 1 and a re-combustion chamber 3 is provided at an upper portion. In room 2,
A fire door 4 is provided on the front side thereof.
The main combustion burner 6 is further provided on the rear side. Further, a reburn burner 7 is provided on the rear side of the reburning chamber 3 and a smoke outlet 8 is provided on the front side.

In the furnace body 1, the flue 9 is provided with an opening 10 of the flue 9 in the upper rear portion of the main combustion chamber 2 near the main burner 6.
And is provided so as to rise upward from the opening 10 and extend upward to intersect with the flame emitted from the reburn burner 7. The entrance 12 facing the burner 7 is open. The hanging wall 11 is provided to extend into the main combustion chamber 2.

The flue 9 has an upwardly directed nozzle 13 in the opening 10 thereof.
It is provided so as to penetrate from the outer surface of the rear wall 14 of the furnace body 1 to the inside. Although not shown, external air is forcibly supplied to the nozzle 13 by a blower.

FIG. 2 shows only the main part of the furnace body 1.
The structure of the flue 9 and the structure of the flue 9 are the same as those in the above-mentioned example, and the nozzle 13 protrudes upward in the opening 10 of the flue 9 from the guide pipe 15 installed between both side walls of the furnace body 1. The number of the nozzles 13 is one or several. Further, both ends or one end of the guide tube 15 is opened outside the furnace. Further, also in this example, the outside air is forcibly supplied by a blower.

The example shown in FIG. 3 is a furnace 1 having a structure similar to that of the example shown in FIG. 1 except that the structure of a nozzle 13 for a flue 9 provided at the rear is different. 2 is provided with a nozzle 13 for discharging air toward the opening 10 of the flue 9 below the main burner 6 near the rear wall 14 side, and air is supplied to the nozzle 13 inside the rear wall 14. A space 16 communicating with a lower portion of the nozzle 13 is provided in the space, and a guide tube 15 is inserted into the space 16 from the side of the furnace body 1 and installed.
A plurality of through-holes 17 are formed in a portion located in the space 16 of the air passage. Air supplied to the guide pipe 15 by forced or natural flow is released from the through-holes 17 and supplied to the nozzle 13. is there.

In the example shown in FIG. 4, an opening 10 of the flue 9 is provided in the upper part on the front side of the main combustion chamber 2, and a cavity communicating with the opening 10 is provided between the main combustion chamber 2 and the reburning chamber 3. And the hollow portion is formed so as to communicate with the hollow portion between the hanging wall 11 of the reburning chamber 3 and the reburning burner 7. The nozzle 13 is provided on a front wall 18 of the flue gas 9 toward the inside of the cavity between the main combustion chamber 2 and the reburning chamber 3 of the flue 9.

In each of the above examples, the gas supplied to the nozzle 13 is appropriately controlled by a damper (not shown).

[0015]

According to the cremation furnace of the present invention, since the gas required for combustion is inserted toward the opening of the flue, there is no danger of increasing the pressure in the main combustion chamber. Can be cremated in a state.

Further, since the gas is inserted into the flue to promote the combustion of the unburned gas, the amount of air released from the main burner and the reburner is reduced as compared with the conventional cremation furnace. By reducing the noise, the noise generated from the burner can be reduced, and the work environment for cremation can be improved.

Further, by inserting the gas into the flue, the suction force of the unburned gas generated in the main combustion chamber to the flue acts, so that the resistance value in the main combustion chamber can be reduced. Also, in the case of a trolley-type crematorium, the amount of circulation of the high-temperature gas to the lower part of the trolley decreases, and the durability of the trolley can be improved.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a cremation furnace according to the present invention.

FIG. 2 is a sectional view of a principal part showing a first example of the same example.

FIG. 3 is a sectional view showing a second example of the same example.

FIG. 4 is a sectional view showing a third example of the same example.

[Explanation of symbols]

 Reference Signs List 1 furnace body 2 main combustion chamber 3 reburn chamber 6 main burner 7 reburn burner 9 flue 10 open port 13 nozzle

Claims (1)

[Claims] 1. A cremation furnace comprising a main combustion chamber (2), a reburning chamber (3) and a flue (9) connecting the two chambers (2, 3). A cremation furnace having a nozzle (13) for discharging a gas that promotes combustion of unburned gas from the main combustion chamber (2) side toward the reburning chamber (3) side.