JPH0435696Y2 - - Google Patents

Description

[Detailed explanation of the invention] [Industrial application field] This invention is a vortex flute device in a crematorium, specifically, it is installed in the reburning chamber of a crematorium to promote the combustion of unburned gas components. This invention relates to a vortex flute device.

[Prior art] Generally, this type of device is developed by, for example, the U.S. Pat.
As disclosed in Publication No. 181670, etc., refractory blocks with a rectangular cross section are alternately stacked in the combustion chamber, and rectangular gaps are formed on the top, bottom, left and right of each refractory block with respect to the exhaust gas traveling direction. While the exhaust gas passes through the rectangular gap, it becomes a vortex and burns. However, in this case, since this gap is formed by a square block, its cross section is square, and a vortex flow occurs in this gap.
When the vortex collides with a corner, its force weakens, resulting in poor eddy current conduction efficiency and smoke. In order to solve these drawbacks, for example, as disclosed in Japanese Utility Model Application Publication No. 53-34168, a plurality of circular refractory metal tubes are alternately stacked inside the combustion chamber, and the efficiency is increased by circular eddy current flame guide holes. A method has been proposed that brings out the eddy current conduction effect.

[Problem to be solved by the invention] In this conventional example, the exhaust gas swirls inside the circular vortex pipe and passes through it in a spiral shape, increasing the vortex pipe efficiency, but the momentum or speed is too fast. Because the exhaust gas passes through the combustion chamber in a short period of time, there is a risk that the exhaust gas may not be completely combusted before being exhausted, which may cause pollution such as odor and soot.

Therefore, the object of the present invention is to provide a vortex flame guide device for a crematorium that can increase the vortex flame conduction effect, lengthen the passage time in the reburning chamber, achieve complete combustion, and suppress the generation of pollution. .

[Means for Solving the Problems] The present invention provides a vortex flute in a crematorium in which a vortex flute is formed by stacking a plurality of refractories alternately in the middle of a reburning chamber that communicates with the top of the main combustion chamber. In the hole device, a circular vortex fire guide hole 3 is installed in a refractory 2 having a rectangular cross section.
The refractories 2 are stacked alternately with gaps between them to form a circular vortex fire guide hole 3 and a rectangular vortex fire guide path 4 adjacent to each other.

[Function] With the above configuration, construction can be carried out by simply stacking refractories alternately, and the exhaust gas G ₁ passing through the spaces of the vortex fire pipe 3 and the vortex fire pipe 4 which are adjacent to each other in the vortex fire pipe device. Because the speed and momentum of G ₂ are extremely different, on the exhaust side, the two types of exhaust gas flows G ₁ and G ₂ with extremely different speeds and momentum collide violently and spread, creating intense turbulence, and the exhaust gas flows into the re-combustion chamber. There is momentum within 1, but it stays for a long time and passes,
The fuel is efficiently and completely combusted, producing no odor or soot, and is exhausted without the risk of pollution.

[Example] Next, an example based on the above characteristics will be described with reference to the accompanying drawings.

As shown in FIG. 5, in a vortex flame guide device installed approximately in the middle of the re-combustion chamber 1 which is connected above the main combustion chamber 5 to promote combustion of unburned gas components, FIG. An elongated refractory brick 2 with a rectangular cross-section as shown in FIG. As shown in Fig. 5, it can be easily constructed by stacking the layers alternately with gaps so as to face the direction of movement of exhaust gas in the reburning chamber 1. Two circumferential rectangular vortex fire guides 4 are formed adjacent to each other. In this case, as shown in FIGS. 2 and 3, the corner portions 2a of the refractory bricks 2 having a rectangular cross section are engaged and stacked to form a rectangular swirl fire guide 4. Incidentally, chamfered portions may be formed in each part of the refractory brick 2, and instead of the refractory brick, it may be molded with a refractory material made of cement, asbestos, or the like.

Therefore, by equipping the vortex fire guide device A of this invention, each refractory brick 2 is heated by the flame and heat generated in the main combustion, and each of the elongated circular vortex fire guide holes 3 and the rectangular vortex fire guide are heated. 4, the exhaust gas and hot air are mixed and the re-combustion efficiency is increased. In this case, as shown in Fig. 6, the exhaust gas _G1 passes through the circular vortex fire guide hole 3 in a spiral manner, so the contact area with the refractory bricks 2 is large, increasing the vortex flow conduction effect. At the same time, the passage speed is fast and the force is strong, so that the absorption side of the refractory brick 2 absorbs the exhaust gas vigorously and the exhaust gas is vigorously exhausted on the exhaust side. On the other hand, as shown in Fig. 6, a vortex fire guiding effect occurs in the rectangular vortex fire guide 4 as well, but the momentum of the exhaust gas _G2 is weakened by colliding with the corners of the square, and its passage speed is slow and absorption is slow. The exhaust is also weak. Then, on the exhaust side of the refractory brick 2 in which a large number of these eddy current fire guide holes 3 and eddy current fire guide paths 4 are stacked adjacent to each other, gas flows G ₁ and G ₂ having different passing speeds and forces are intensively mixed and diffused. This causes severe turbulence and the time the exhaust gas remains in the reburning chamber 1 becomes longer.
Complete combustion reduces pollution. Further, in the latter half of the cremation, each refractory brick 2 is sufficiently scorched, so the re-combustion burner (not shown) can be stopped, resulting in a reduction in fuel consumption. Also, as shown in Fig. 7, part of the combustion gas from the main combustion chamber 5 is transferred to each refractory brick 2.
The fuel collides with the combustion gas, reflects backflow, collides with the combustion gas, and disperses, resulting in sufficient reburning. In addition, since the cross-sectional area of the vortex fuse 3 can be approximately 1/2 of the cross-sectional area of the passages before and after it, the gas velocity V passing through the vortex fuse 3 is approximately doubled to 2V. Therefore, at the outlet of the vortex flow guide hole 3, there is a sudden change from 2V to V, which further promotes turbulence and entrains the surrounding gas, causing diffusion and mixing.

This idea is as described above, so it increases the area of the vortex flute consisting of the circular vortex flute 3 and the square vortex 4 for gas flow in a narrow space, and reduces collisions, turbulence, and velocity. Sudden changes can be sufficiently eliminated and complete combustion can be promoted, and since the refractory bricks 2 are relatively thin, they are ignited in a short time, increasing the combustion efficiency, and the circular swirling fire guide hole 3 increases the exhaust pressure drop. There is no need to enlarge the exhaust cross section. Furthermore, since the corner portions 2a of the refractory bricks 2 are engaged and stacked, it is robust. In addition, since only a small number of refractory bricks 2 are used and construction and replacement are easy, it has practical effects such as low cost.

[Effects of the invention] As detailed above, according to the invention, a crematorium is provided in which a plurality of refractories are alternately stacked in the middle of a reburning chamber that communicates with the main combustion chamber to form a vortex flute. In the vortex fire guide device, a circular vortex fire guide is formed in a refractory with a rectangular cross section, and the refractories are stacked alternately with gaps between them to form a circular vortex fire guide and a square vortex fire guide. By forming these adjacent to each other, it is possible to provide a vortex flame guide hole device for a crematorium that can enhance the vortex flame guide effect, lengthen the residence time in the combustion chamber, achieve complete combustion, and suppress the occurrence of pollution.

[Brief explanation of drawings]

Figure 1 is a perspective view, Figure 2 is a perspective view of the stacked state,
3 and 4 are sectional views of the same as above, FIG. 5 is a usage state diagram, and FIGS. 6 and 7 are explanatory diagrams. 1... Reburning chamber, 2... Refractory brick (refractory),
3... Vortex fire guide, 4... Vortex fire guide.

Claims (1)

[Scope of utility model registration request] In a vortex fire guide device for a crematorium, in which a swirl flute is formed by stacking a plurality of refractories alternately in the middle of a reburning chamber that communicates with the top of the main combustion chamber, a circular A vortex fire in a crematorium, characterized in that a vortex fire guide is formed, and the refractories are stacked alternately with gaps between them to form a circular swirl fire guide and a square swirl fire guide adjacent to each other. Channel device.