JP3197843U - Cremation furnace - Google Patents

Abstract

Disclosed is a cremation furnace excellent in environmental sanitation by efficiently and completely burning unburned exhaust gas in a recombustion chamber so as to make the exhaust gas smokeless and non-brominated. A main combustion chamber 1 containing soot, a main combustion burner 5 installed on a rear wall surface of the main combustion chamber 1, a recombustion chamber 10 communicating with the main combustion chamber 1 through a flue 9, A recombustion burner 11 installed on the ceiling surface of the combustion chamber 10, a vortex flow guide hole device 13 having a quadrangular cross section made of a refractory stacked in the middle of the recombustion chamber 10, and the rear of the recombustion chamber 10 The third combustion chamber 17 communicates with the chamber 10b and is erected vertically with respect to the recombustion chamber 10, and the vortex flow guide hole device 13 is penetrated in the length direction and gradually moves from the exhaust gas inlet to the outlet. It has a circular eddy current conducting hole having a small diameter, and a square eddy current conducting path is formed by stacking the eddy current conducting device 13. [Selection] Figure 1

Description

  The present invention relates to a cremation furnace, and more particularly to a cremation furnace in which unburned gas is effectively and completely burned by an eddy current guide device provided in a recombustion chamber.

  In a general cremation furnace, a main combustion burner is installed on the rear wall of the main combustion chamber, and unburned gas generated in the main combustion chamber is also generated on the rear wall of the recombustion chamber corresponding to the main combustion burner. A reburning burner is installed to burn. Then, harmful substances such as dioxin and methane gas contained in the exhaust gas were removed, smokeless and brominated, and the exhaust gas was released into the atmosphere.

  However, in the above-mentioned cremation furnace, after burning the burner in the main combustion chamber, firewood, clothing, burial goods, etc. burn for about 20 minutes, which is higher than the average calorific value of 1035 kcal / kg when the corpse burns. Because it has a calorific value of 4000 kcal / kg or more, it cannot be burnt completely unless a large amount of combustion air is consumed, and when it ignites, it starts burning more rapidly than the dead body. Is big.

  For example, at the moment of ignition, a large amount of exhaust gas containing incomplete combustion gas is generated due to insufficient air necessary for combustion. In addition, since the atmosphere in the cremation furnace is low at the beginning of ignition, the reaction with the air in the main combustion chamber is reduced and the exhaust gas is released as incomplete combustion gas.

  For this reason, in the recombustion chamber, thermal energy is added to the exhaust gas generated in the main combustion chamber by the recombustion burner to perform thermal oxidation, i.e., complete combustion by burning, but the recombustion burner capacity, Due to its capacity, exhaust gas with smoke and offensive odor could not be completely combusted.

  Therefore, the applicant of the present invention is to install an eddy current heat introduction device, which is made of a refractory material having a rectangular cross section in the recombustion chamber of the cremation furnace and penetrates a circular eddy current conduction hole in the length direction, with gaps alternately. By stacking and adjoining a circular vortex current guide hole and a square vortex current guide path, exhaust gas is allowed to flow in and contact with the vortex current guide device, so that exhaust gas and hot air are efficiently mixed and completely burned. A cremation furnace has been proposed that is smokeless and non-brominated to suppress the occurrence of pollution (see, for example, Patent Document 1).

Japanese Utility Model Publication No. 4-356976

  However, the circular eddy current guide hole and the square eddy current guide path of Patent Document 1 are different in shape between a circular shape and a square shape, but the cross-sectional area does not change so much, so that the eddy current guide hole passes through the eddy current guide hole. The speed and momentum of the exhaust gas is almost the same as the speed and momentum of the exhaust gas passing through the vortex channel, there is little turbulence generated on the exhaust side, and there is a problem that the exhaust gas is not completely burned and the combustion efficiency is poor .

  The present invention was developed in view of the above-mentioned problems, and the unburned exhaust gas generated in the main combustion chamber is effectively completely burned in the recombustion chamber without causing smoke and odorless pollution. The purpose is to provide a cremation furnace with excellent energy saving.

  In order to solve the above-described problems and achieve the object, a cremation furnace according to the present invention includes a main combustion chamber for storing soot, a main combustion burner installed on a rear wall surface of the main combustion chamber, and the main combustion A recombustion chamber that communicates with the chamber through a flue, a recombustion burner installed on the ceiling surface of the recombustion chamber, and a refractory that is stacked with a gap in the middle of the recombustion chamber. A vortex flow guide hole device and a tertiary combustion chamber that communicates with the rear chamber of the recombustion chamber and stands upright with respect to the recombustion chamber. The vortex flow guide hole device is penetrated in the length direction. It has a circular eddy current guide hole that gradually decreases in diameter from the exhaust gas inlet to the exhaust port, and a rectangular eddy current guide path formed by stacking the eddy current guide device is formed. To do.

  According to this, when the firewood and the sub-funeral are burned by the main combustion burner in the main combustion chamber, exhaust gas containing smoke and bad odor is generated. The exhaust gas does not immediately flow into the recombustion chamber but stays in the main combustion chamber, and during that time, combustion is performed while controlling the amount of combustion of the burner, and insufficient combustion air is replenished from the combustion air port.

  Thereafter, the exhaust gas in the upper part flows through the flue to the recombustion chamber and is mixed with the combustion exhaust gas, and the unburned gas is thermally decomposed by the injection of the recombustion burner installed on the ceiling surface. In addition, the reburning burner has a flame that is jetted obliquely downward, collides with an eddy current guide device that reflects off the bottom plate and promotes combustion of unburned gas, and maintains a scorching state. By contacting the apparatus, the unburned exhaust gas, which could not be heated only by the combustion of the reburning burner, is heated and completely burned.

  Furthermore, in the middle of the re-combustion chamber in the direction of exhaust gas travel, there are circular vortex flow guide holes and square vortex flow guide channels of different shapes and sizes. However, since it passes spirally through the circular vortex current guide hole and the rectangular vortex current guide path, the contact area between the vortex current guide hole and the vortex current guide path increases. Since the exhaust gas flow is faster and more vigorous, the exhaust gas flow in the vortex flow channel is slower and has no momentum. The two types of exhaust gas collide and diffuse violently to generate intense turbulence, and the unburned exhaust gas is thoroughly mixed and heated to complete combustion.

  Further, the exhaust gas that has flown out to the rear of the recombustion chamber flows into the tertiary combustion chamber. However, since the tertiary combustion chamber is erected vertically with respect to the recombustion chamber, the force for sucking the exhaust gas increases and the tertiary combustion chamber Flows smoothly.

  Here, it is preferable that the recombustion burner heats the vortex flow guide hole device by reflecting a flame against a bottom plate of the recombustion chamber.

  As a result, the vortex flow guide device is in a scorching state, and the exhaust gas comes into contact with the vortex flow guide device or flows into a circular vortex guide hole or a rectangular vortex guide channel. Then, the temperature of the exhaust gas that could not be raised only by the combustion of the reburning burner is raised.

  Here, it is preferable that the tertiary combustion chamber is provided with baffle plates that protrude alternately from the left and right side wall surfaces toward the center.

  As a result, the flue gas that has entered the tertiary combustion chamber collides with the baffle plate and changes its flow, resulting in turbulent action, and the exhaust gas is completely burned by mixing the hot and cold gases evenly. , No harmful substances such as dioxin and methane gas are released outside the furnace body.

  As explained above, according to the cremation furnace of the present invention, the exhaust gas generated in the main combustion chamber is combusted by the burner of the recombustion chamber, and through the eddy current guide hole device that promotes the combustion of unburned gas components. As a result, exhaust gas can be heated to complete combustion.

It is a longitudinal cross-sectional view of the cremation furnace of this invention. It is a perspective view of an eddy current fire introduction device. It is a longitudinal cross-sectional view of FIG. It is a front view which shows the stacking state of an eddy current fire guide apparatus. It is explanatory drawing which shows the state which exhaust gas flows in into and passes through a vortex current guide hole and a vortex current guide channel.

  Hereinafter, an embodiment of a cremation furnace according to the present invention will be described with reference to the accompanying drawings. The front wall of the main combustion chamber 1 is provided with an inlet / outlet port 3 of the mounting carriage 2, and a heat insulating door 4 can be opened and closed in the vertical direction, and a main combustion burner 5 is installed on the rear wall surface. In addition, an inspection window 6 and a secondary combustion air port 7 are provided at the upper part, and a guide rail 8 for the mounting carriage 2 is provided at the bottom.

  In the upper part of the main combustion chamber 1, there is provided a recombustion chamber 10 that communicates with a flue 9 that is provided vertically in the upper front part of the main combustion chamber 1. The combustion burner 11 is installed so that a flame is ejected obliquely downward, the flame hits the bottom plate 12 and bounces back, and heats the vortex flow guide hole device 13 at a position substantially in the middle of the recombustion chamber 10. .

  The eddy current fire guide device 13 is formed of refractory bricks, and is intended to promote the combustion of unburned gas components in the recombustion chamber 10, and as shown in FIG. The eddy current conduction hole 14 is penetrated along the length direction of the center part. As shown in FIG. 3, the vortex flow guide hole 14 is formed in a tapered shape in which the hole diameter gradually decreases from the exhaust gas inlet 14 a toward the outlet 14 b.

  As shown in FIG. 4, the eddy current conducting hole device 13 includes a square eddy current conducting path 16 formed by alternately stacking gaps 15 and a circular eddy current conducting device penetrating the eddy current conducting hole device 13. The holes 14 are arranged adjacent to each other.

  In the rear chamber 10b of the recombustion chamber 10, a tertiary combustion chamber 17 is erected vertically with respect to the recombustion chamber 10, and a baffle plate 18 that protrudes horizontally from the inner wall surface toward the center is attached. .

  An example of the use of a cremation furnace having such a structure will be described. A corpse containing a corpse, a secondary funeral, and dry ice is placed on a pallet carriage 2, housed in the main combustion chamber 1, and the heat insulating door 4 is closed to perform cremation. .

  In the main combustion chamber 1, combustion is performed using the natural combustion and the main combustion burner 5 while controlling the combustion amount, and the combustion air that is deficient from the secondary combustion air port 7 is replenished. The exhaust gas generated by the combustion in the main combustion chamber 1 flows into the recombustion chamber 10 through the upper flue 9, and the unburned organic matter is effectively decomposed by the combustion of the recombustion burner 11.

  Further, in the middle of the recombustion chamber 10, there are a circular vortex flow guide hole 14 and a square vortex flow guide passage 16 having different shapes and sizes, and when the exhaust gas flows in, a vortex is generated and the vortex is wound. Since the circular eddy current guide hole 14 and the square eddy current guide path 16 spirally pass, the contact area between the eddy current guide hole 14 and the eddy current guide path 16 increases. Since the diameter is gradually reduced from the inlet 14a toward the outlet 14b, the flow velocity is fast and strong, and the flow velocity and momentum with the vortex flow guide passage 16 are extremely different. The types of exhaust gases G1 and G2 violently collide and diffuse to generate intense turbulence, and the unburned exhaust gas is sufficiently mixed and completely burned.

  Further, the organic matter such as dioxins that has not been thermally decomposed in the recombustion chamber 10 changes the flow of the exhaust gas by the baffle plate 18 provided in the tertiary combustion chamber 17 to become a spiral swirl flow, and the combustion exhaust gas The organic matter inside is removed efficiently in the tertiary combustion chamber.

  As mentioned above, although embodiment of this invention was described, this invention is not limited to these embodiment, For example, although the cross-sectional shape of the eddy current conducting hole was demonstrated circularly, another shape may be sufficient. The flue has been described as having a structure that leads from the front of the main combustion chamber to the rear of the recombustion chamber. However, the flue may have a structure that leads from the rear to the rear of the recombustion chamber. Needless to say, various design changes can be made without departing from the spirit of the present invention.

  According to the present invention, it is smokeless and odorless, does not cause pollution, and can be effectively used as a cremation furnace excellent in environmental conservation considering energy saving and labor saving.

DESCRIPTION OF SYMBOLS 1 Main combustion chamber 5 Main combustion burner 9 Flue 10 Recombustion chamber 10b Back chamber 11 Recombustion burner 12 Bottom plate 13 Eddy current guide hole device 14 Eddy current guide hole 14a Exhaust gas inlet 14b Exhaust gas outlet 15 Clearance 16 Eddy current guide 17 Tertiary combustion chamber 18 Baffle plate

Claims (3)

A main combustion chamber containing soot,
A main combustion burner installed on the rear wall surface of the main combustion chamber;
A recombustion chamber communicating with the main combustion chamber via a flue;
A reburning burner installed on the ceiling surface of the reburning chamber;
A vortex flow guide device with a square cross-section made of refractories stacked with a gap in the middle of the re-combustion chamber;
A tertiary combustion chamber that communicates with the rear chamber of the recombustion chamber and stands upright with respect to the recombustion chamber;
The eddy current guide hole device has a circular eddy current guide hole that gradually decreases in diameter from the exhaust gas inlet port penetrated in the length direction toward the discharge port,
A cremation furnace characterized in that a square eddy current conduit is formed by stacking the eddy current conduit devices. 2. The cremation furnace according to claim 1, wherein the reburning burner heats the vortex flow guide device by reflecting a flame against a bottom plate of the reburning chamber and reflecting the flame. 3. The cremation furnace according to claim 1, wherein a baffle plate is provided in the tertiary combustion chamber so as to alternately protrude from the left and right side wall surfaces toward the center portion. 4.