JPH0245622Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a circular reburning furnace having a furnace wall having a circular cross section.

Conventional reburning furnaces have a furnace wall with a single-wall structure made of only heat insulating material and have a rectangular cross-section. The wall was configured to accommodate a single rekindling burner. However, since the furnace walls are vertical and horizontal, the radiant heat is dispersed horizontally and vertically, respectively, resulting in poor thermal efficiency.In addition, with one reburner, the flame cannot directly hit all of the exhaust gas from the crematorium. Moreover, since the flame hits the exhaust gas from only one direction, it is necessary to wait until the temperature inside the furnace reaches a high temperature, resulting in poor reburning efficiency, which requires a large amount of fuel and a long reburning time. It was uneconomical. In addition, since the weight of the upper wall of the furnace wall is concentrated in one place at the top of both end walls, furnace clamps are required to support the stress that tries to expand both walls outward, or In order to support the stress of crushing the furnace, it is necessary to make the walls on both sides thicker than necessary. This combined with the fact that the brick construction of the furnace wall is difficult and there are problems with durability, as well as problems with spalling resistance due to expansion and contraction.Furthermore, it has poor vibration resistance. However, it was impossible to manufacture or transport the bricks in a factory, and the brickwork for the furnace walls had to be done on-site, making installation difficult.

This idea was devised to solve the above-mentioned problems, and was created by creating a furnace with a double structure and a circular cross section, with refractory bricks arranged in a row on the inner circumferential surface of a cylindrical insulating material. A reburning chamber is provided on the front and rear sides of the furnace wall, which is long in the longitudinal direction of the cylinder core, and has a reburning chamber through partition walls. An eye-shaped smoke inlet hole is provided that flows in through the duct, and an eye-shaped smoke outlet is provided at the bottom of the rear bulkhead that allows the reburned gas reburned in the reburning chamber to flow out to the rear flue. Inside the smoke vent, a large number of small-diameter ceramic refractory bricks containing fireclay are arranged in parallel in a honeycomb shape, and on the furnace wall above the reburning chamber are two reburning burners with adjustable oil and electricity levels. 45 so that their flames intersect at right angles.
It is installed facing downward at a degree angle, and a communication hole is provided at the bottom of the flue on the front side of the furnace wall to communicate with the inside of the crematorium, and a communication hole is provided at the top of the flue on the rear side to communicate with the inside of the hood. By removably fitting an inspection lid into the inspection hole drilled into the rear wall, during cremation, radiant heat is collected from all sides to the center, improving thermal efficiency, and all of the exhaust gas from the crematorium is The flame of each reburning burner is applied from two directions at right angles to improve the reburning efficiency, saving fuel and shortening the reburning time, making it extremely economical, and dispersing the stress caused by the weight of the upper part of the furnace wall. In addition, the circular re-burning structure does not cause strain on the brick construction of the furnace wall, has excellent durability, resistance to spalling due to expansion and contraction, vibration resistance, etc., and can be manufactured in a factory and transported, making installation extremely easy. It provides a furnace.

An embodiment of this invention will be described below with reference to the drawings.

As shown in the figure, a furnace wall 3 with a circular cross section in which refractory bricks 2 are arranged in a line is formed on the inner peripheral surface of a cylindrical heat insulating material 1, and the furnace wall 3 is long in the longitudinal direction. A reburning chamber 6 is provided approximately in the center via partition walls 4 and 5 on the front and rear sides, and above the partition wall 4 on the front side,
A smoke inlet hole 8 is provided through which exhaust gas flows from the crematorium H through the flue 7 on the front side, and a smoke inlet hole 8 is provided at the bottom of the partition wall 5 on the rear side.
A smoke outlet 10 is bored through which reburned gas reburned in the reburning chamber 6 flows out to a flue 9 on the rear side.

Inside the smoke vent 10, a large number of small-diameter fireproof pipes 11 made of ceramic containing fireclay or the like are arranged in parallel in a honeycomb shape. Further, a fireproof pipe 11 similar to this may be similarly arranged within the smoke inlet hole 8.

Two reburn burners 12 are installed on the furnace wall 3 above the reburn chamber 6, and the amount of oil and electricity can be adjusted freely.
(gun type) mounted downward at a 45 degree angle so that their flames intersect at right angles.

Further, a communication hole 13 communicating with the inside of the cremator H is provided in the lower part of the flue 7 on the front side of the furnace wall 3, and a communication hole 15 communicating with the inside of the hood 14 is provided in the upper part of the flue 9 on the rear side. to drill. Reference numeral 16 denotes an inspection lid made of refractory castable that is removably fitted into an inspection hole 17 formed in the rear wall of the furnace wall 3.

Incidentally, numeral 18 is a furnace support stand for supporting the circular reburning furnace of this invention (indicated by a chain line in FIG. 2). If the reburning furnace is placed on this furnace support stand 18,
Since the weight of the reburning furnace is no longer applied to the lower crematorium H, damage to the crematorium H can be prevented.

Since this device is constructed as described above, during cremation, the exhaust gas from the crematorium H flows from the front communication hole 13 through the front flue 7 and the smoke inlet hole 8 in order into the reburning chamber 6. In this reburning chamber 6, 2
The reburned gas, which has been reburned in the reburner 12 on the stand and has become almost smokeless and odorless, passes through each fireproof pipe 11 arranged in the smoke outlet 10 and communicates with the lower part of the flue 9 on the rear side. It sequentially passes through the holes 15 and flows out to the hood 14 side, forming a furnace wall with a circular cross section above the reburning chamber 6. By installing two reburning burners 12 with adjustable oil and electricity quantities on the 3rd floor at a 45 degree angle so that their flames intersect at right angles,
During cremation, the flame of each rekindling burner 12 directly hits all of the exhaust gas from the cremator H at right angles from two directions, so there is no need to wait until the temperature inside the furnace reaches a high temperature as in the past, and Even soot and smoke is oxidized and burned to become almost smokeless and odorless, resulting in extremely good reburning efficiency. Also, by forming the furnace wall 3 with a circular cross-section, it can be used like a conventional furnace wall 3 with a rectangular cross-section. The radiant heat is not dispersed horizontally or vertically, but is concentrated in the center from all sides, resulting in extremely good thermal efficiency, which together with the fact that it significantly saves fuel and shortens the reburn time. It is extremely economical.

In this case, the circular reburning furnace of this invention is equipped with two reburners 12 that can freely adjust the amount of oil and electricity. Compared to,
It seems to require twice as much fuel and twice as much electricity, but according to experimental results, one reburn burner conventionally required 30-40KW of fuel and 0.75KW of electricity. In this design, two rekindling burners 1
Add 2 to half the fuel, 15, and the amount of electricity to 0.5KW.
That's all you need. In addition, while conventional methods required 20 to 30 minutes to regenerate, this new design cuts the relapse time in half to 10 to 15 minutes.

Furthermore, an eye-shaped smoke inlet 8 is provided at the top of the partition wall 4 on the front side of the reburning chamber 6, through which exhaust gas flows from the cremator H through the flue 7 on the front side, and a reburning chamber 6 is provided at the bottom of the partition wall 5 on the rear side. By providing an eye-shaped smoke outlet 10 through which the reburned gas reburned inside the crematorium flows out to the flue 9 on the rear side, the exhaust gas from the cremator H flows into the shape of the smoke inlet 8 and the smoke outlet 10. Correspondingly, it is thought that the exhaust gas flows in a meandering manner in the reburning chamber 6 with a cross-sectional shape, and the flame of the reburning burner 12 in the reburning chamber 6 is effective at the central most bulging part of the upper arcuate part of the exhaust gas in the cross-sectional shape. , the reburning efficiency is even better.

In addition, by arranging a large number of ceramic fireproof pipes 11 containing fireclay in parallel in a honeycomb shape in the smoke outlet 10 of the reburning chamber 6, the reburning burner 12 in the reburning chamber 6 prevents reburning during cremation. Since the reburned gas, which has become almost smokeless and odorless, passes through the heated refractory pipes 11 in the smoke outlet 10 and the gaps between the refractory pipes 11, the reburning efficiency is further improved. It further saves fuel and shortens reburn time, and since it is made of ceramic with fireclay, it has excellent heat resistance and is extremely robust.

In addition, the refractory bricks 2 are arranged in a row on the inner peripheral surface of the cylindrical heat insulating material 1, making the furnace wall 3 a single-layer structure, and the fact that the furnace wall 3 has a circular cross section is compatible. In addition, in order to support the stress that occurs when the weight of the upper wall is concentrated at one place on both side walls, as in the case of the conventional furnace wall 3, a furnace clamping tool is required, or the wall thickness of both side walls is increased. Since the stresses caused by the weight of the upper part of the furnace wall 3 are dispersed without causing any damage, the brick construction of the furnace wall 3 is easier compared to the conventional single-layered structure, and it has improved mechanical durability and expansion. It has excellent spalling resistance due to shrinkage, vibration resistance, etc., and can be manufactured in a factory and transported, making installation extremely easy.

Furthermore, by forming the furnace wall 3 with a circular cross-section, the structure is not only simpler and easier to repair than the conventional furnace wall 3 with a rectangular cross-section, but also the overall structure is sleek. The appearance is also very good.

In addition, an inspection port 17 drilled in the rear wall of the furnace wall 3
By removably fitting the inspection lid 16 to the reburning chamber 6 and the flue 9, it is possible to inspect the inside of the reburning chamber 6 and the flue 9, and to inspect the fireproof pipe 1.
1 can be easily replaced.

As explained above, the circular reburning furnace of this invention has extremely good reburning efficiency and thermal efficiency, saves fuel and shortens the reburning time, and is extremely economical.Moreover, it is mechanically It also has excellent durability, resistance to spalling due to expansion and contraction, vibration resistance, etc., and has various effects such as being able to be manufactured in a factory and transported, and installation extremely easy.

[Brief explanation of drawings]

The drawing shows one embodiment of this invention.
The figure is a longitudinal side view, and FIG. 2 is a cross-sectional view along the - arrow line in FIG. 1. 1... Insulation material, 2... Firebrick, 3... Furnace wall, 4, 5... Partition wall, 6... Reburning chamber, 7, 9...
Flue, 8...Smoke inlet, 10...Smoke outlet, 11...
Fireproof pipe, 12...Rekindling burner, 13, 15
...Communication hole, 14...Hood, 16...Inspection lid,
17...Inspection port, 18...Furnace support stand, H...Crematorium.

Claims (1)

[Scope of utility model registration request] A furnace wall with a circular cross section is formed by a double structure in which refractory bricks are arranged in a row on the inner peripheral surface of a cylindrical heat insulating material. Reburning chambers are provided on the front and rear sides through partition walls, and an eye-shaped smoke inlet is provided in the upper part of the front partition wall through which exhaust gas flows from the crematorium through the front flue, and in the lower part of the rear partition wall. is equipped with an eye-shaped smoke outlet that allows the reburned gas reburned in the reburning chamber to flow out to the rear flue, and inside this smoke outlet, a small diameter fireproof brick made of ceramic containing fireclay is installed in a honeycomb shape. Two reburn burners with adjustable oil and electricity levels are installed on the furnace wall above the reburn chamber, facing downward at a 45 degree angle so that their flames intersect at right angles. A communication hole was provided at the bottom of the flue on the front side of the wall to communicate with the inside of the crematorium, and a communication hole was provided at the top of the flue on the rear side to communicate with the inside of the hood. A circular reburning furnace characterized by a removable inspection lid fitted into the inspection opening.