JPH0581255U - Lattice dust remover for coke dry fire extinguishing equipment - Google Patents

Abstract

(57) [Abstract] [Purpose] While suppressing the thermal expansion of the lattice bricks of the lattice type dust remover of the coke dry fire extinguisher in the high temperature gas atmosphere,
Prevents wear and breakage due to deterioration of hanging hardware. [Structure] In a lattice type dust remover provided in a passage of high temperature gas introduced into a boiler from a cooling tower of a coke dry fire extinguisher, a ceramic brick having a collection groove on an upstream side surface and a recess on a downstream side upper surface Brick 3 and brick 4 having convex portions on the upper and lower surfaces on the downstream side and brick 5 having concave portions on the lower surface on the downstream side
And the grid bricks 1 that are sequentially stacked, and penetrate the grid bricks 1,
A double metal pipe 6 which is divided into two parts in the vertical direction by a partition plate.
It consists of a water supply pipe 12 and a drain pipe 13 which are connected to the upper end. [Effect] It is possible to reduce the coefficient of thermal expansion of the lattice brick, prevent breakage due to elongation and thermal deterioration of the hanging metal, and suppress wear of the heat tube of the waste heat boiler due to falling of the lattice brick.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a lattice type dust remover installed in a passage for hot gas introduced into a boiler from a cooling tower of a coke dry fire extinguisher.

[0002]

[Prior Art]

 As shown in FIG. 5, the coke dry fire extinguishing equipment has a pre-chamber 32 having a charging port 31 for red hot coke at the top, a circulating gas blowing device 33 for cooling, and a coke outlet 34 at the bottom. The cooling chamber 35 has a cooling tower 36. Inside the peripheral wall of the pre-chamber 32, there is provided an annular flue 38 that communicates with a large number of small flues 37 that open along the peripheral wall surface of the pre-chamber 32 and the cooling chamber 35. The circular flue 38 is connected to a waste heat boiler 41 via a flue 40 having a primary dust remover 39. The outlet side of the waste heat boiler 41 is connected to a blower 43 via a dust collector 42 such as a cyclone, and the outlet side of the blower 43 is connected to a circulating gas blowing device 33 below the cooling chamber 35.

The red hot coke charged from the charging port 31 into the pre-chamber 32 is blown from the circulating gas blowing device 33 while descending the cooling tower 36, and the inert gas and the heat rising in the cooling chamber 35. It is replaced, cooled, and discharged from the coke cutout 34 at the bottom. The inert gas heated by exchanging heat with the red hot coke enters the annular flue 38 from the small flue 37, and the coke dust that accompanies the flue 40 is removed by the primary dust remover 39, and then the waste heat boiler 39. After being introduced into 41, heat is recovered, dust is removed again by the dust collector 42, the pressure is increased by the blower 43, and the gas is blown again from the circulating gas blowing device 33 below the cooling chamber 35.

As a primary dust remover installed in the flue of the above-mentioned coke dry fire extinguisher, a grid type dust remover is often adopted. As shown in FIG. 6 and FIG. 7, the lattice type dust remover has lattice bricks 51 having collection grooves on the upstream side, which are stacked with heat-resistant bricks, etc., and are vertically staggered at predetermined intervals in the flue with the hanging hardware 52. Structure in which the powder coke in the high temperature inert gas from the circular flue is collected in the collection groove of the lattice brick 51 and then lowered along the collection groove to be collected on the lower side. Has become.

The lattice brick 51 of the lattice type dust remover is curved as shown by a chain double-dashed line in FIG. 6 due to the thermal expansion of the surface promoted by the hot gas and corrosive and oxidizing atmospheres during operation. As a result, the joints between the bricks are opened, and wear progresses sequentially from that portion. In addition, the hanging metal object 52 holding the lattice brick 51 gradually undergoes thermal strain and wear as the lattice brick 51 is worn, and finally the hanging metal object 52 is broken and the lattice brick 51 comes off. .. If the grid bricks 51 fall out, the boiler tube of the waste heat boiler installed on the downstream side of the grid type dust remover frequently breaks, which may lead to a serious accident.

[0006] As a measure for preventing the joint from opening due to the wear of the lattice bricks and the thermal expansion of the bricks of the lattice type dust remover of the coke dry fire extinguishing equipment, the lower end bricks are screwed to the tip of the metal pipe internally cooled by the refrigerant, Hollow bricks are stacked on top of each other by fitting the concave and convex portions on the upper and lower surfaces, and the side surfaces of each brick row are joined in a stepwise manner (collision plate (Japanese Utility Model Publication No. 62-37060)), which is connected to a heat recovery device. Lattice dust remover of dust removal grid (Japanese Utility Model Publication No. 1-36897), which includes a water pipe and a heat-resistant and wear-resistant protector (stainless steel) that surrounds the water pipe and has a dust collecting groove. Etc. have been proposed.

[0007]

[Problems to be solved by the device]

 In the collision plate disclosed in Japanese Utility Model Laid-Open No. 62-37060, the lattice brick is changed to a plane shape and the suspension pipe is water-cooled. However, the weight of the brick and the expansion of the brick are caused by the aerial method. It is facing downward, it is difficult to prevent the opening of joints, and it is not possible to prevent the abrasion of lattice bricks. In addition, the lattice type dust eliminator disclosed in Japanese Utility Model Publication No. 1-36897 is susceptible to deterioration due to corrosive gas because the protector is made of stainless steel, and because it has a welded structure, it is joined by factors such as stress concentration. It has the drawback of frequent cracks in the part and water leaks from the water-cooled pipe.

The object of the present invention is to suppress the thermal expansion of the lattice bricks of the lattice type dust remover of the coke dry fire extinguisher in a high temperature gas atmosphere, and to prevent the wear and breakage of the hanging metal due to deterioration of the hanging metal. It is to provide a lattice type dust remover for fire extinguishing equipment.

[0009]

[Means for Solving the Problems]

 The present inventors have conducted extensive studies to achieve the above object. As a result, by combining bricks made of ceramics with concaves on the upper surface of the downstream side, bricks with convex portions on the upper and lower surfaces of the downstream side, and bricks with concave portions on the lower surface of the downstream side, the high temperature of the lattice bricks can be improved. It was concluded that the thermal expansion in the gas atmosphere can be suppressed and that the lattice brick suspension rod is housed in the center of the water-cooled double pipe to prevent the joint opening after bending due to the thermal expansion of the lattice brick. I reached this idea.

That is, the invention is a lattice type dust remover provided in a passage of high temperature gas introduced into a boiler from a cooling tower of a coke dry fire extinguisher, and a ceramic brick having a collection groove on an upstream side surface, A brick that has a concave portion on the upper surface of the downstream side, a brick that has a convex portion on the upper and lower surfaces of the downstream side, and a brick that has a concave portion on the lower surface of the downstream side, and a partition plate that penetrates the lattice brick. This is a grid-type dust remover with coke dry fire extinguishing equipment consisting of a hanging metal fitting with a hanging rod built in the center of the heavy pipe, and a water supply pipe and a drain pipe connected to the double pipe.

[0011]

[Action]

 In this invention, a ceramic brick having a collection groove on the upstream side surface, a brick having a concave portion on the upper surface on the downstream side, a brick having a convex portion on the upper and lower surfaces on the downstream side, and a brick having a concave portion on the lower surface on the downstream side are sequentially combined. Since the bricks are constructed by stacking the bricks, the expansion coefficient of the brick surface on the hot gas flow side decreases, and the convex parts on the upper and lower sides of the downstream side of the bricks engage with the concave parts of the upper and lower bricks, so that the force that bends upstream is generated. Suppressed. Also, since the suspension rod is built into the center of the water-cooled double pipe that penetrates the lattice brick, it is shielded from the high temperature gas atmosphere, extension of the suspension rod and surface corrosion are prevented, and the joint opening after bending due to thermal expansion of the lattice brick Can be prevented.

In this invention, the material of the lattice brick is ceramic because the coefficient of thermal expansion and contraction is the smallest even in a high temperature gas atmosphere, and wear resistance and joint opening are prevented. In addition, the reason why the suspension rod made of lattice bricks is built in the center of the water-cooled double pipe is to shield the suspension rod from the high temperature gas atmosphere and prevent elongation and surface corrosion.

[0013]

【Example】

 The details of the present invention will be described below with reference to FIGS. 1 is a partially cutaway side view of the lattice type dust remover of the present invention, FIG. 2 is a view taken along line AA of FIG. 1, FIG. 3 is a development view of a hanging metal fitting, and FIG. 4 is a water supply pipe and a drain pipe of the hanging metal fitting. It is a cross-sectional view of a connection part. 1 to 4, reference numeral 1 denotes a ceramic brick having a collection groove 2 on the upstream side, a brick 3 having a recess on the upper surface on the downstream side, a brick 4 having convex portions on the upper and lower surfaces on the downstream side, and a recess on the lower surface on the downstream side. Lattice bricks in which the bricks 5 that have been combined are sequentially stacked using ceramic joint materials, 6 is a hanging metal that penetrates the lattice brick 1, and is divided into two parts in the vertical direction by a partition plate 7 from an outer pipe 8 and an inner pipe 9. The double tube 10 and the hanging rod 11 built in the center of the double tube 10. A water supply pipe 12 and a drain pipe 13 are connected to the upper end of the double pipe 10 so as to be freely water-cooled. The lattice bricks 1 pass through the flue which guides the high temperature gas from the cooling tower of the coke dry fire extinguisher to the exhaust heat boiler, with the collection grooves 2 extending in a zigzag pattern toward the upstream side at predetermined intervals. The coke powder in the high-temperature gas is collected in the collection groove 2 and moved down along the collection groove 2 to the dust pool below.

Since it is configured as described above, the lattice brick 1 includes a brick 3 having a concave portion on the upper surface of the downstream side of the ceramic brick, a brick 4 having convex portions on the upper and lower surfaces of the downstream side, and a brick 5 having a concave portion on the lower surface of the downstream side. Since the ceramic joint materials are sequentially stacked in combination with each other, the surface expansion coefficient of the bricks on the high temperature gas flow side is reduced, and the convex portion on the downstream upper and lower surfaces of the brick 4 suppresses the force of bending forward. it can. Further, since the suspension rod 11 of the dust-removing grid brick 1 is built in the center of the water-cooled double tube 10 and shielded from the high temperature gas atmosphere, the suspension rod 11 is prevented from expanding and surface corrosion, and the thermal expansion of the grid brick 1 is prevented. It is possible to prevent the joint from opening due to the bending due to the bending, and to prevent breakage due to thermal deterioration of the hanging hardware.

[0015]

[Effect of the device]

 As described above, according to the present invention, it is possible to reduce the coefficient of thermal expansion of the lattice brick, and to prevent breakage due to elongation and thermal deterioration of the hanging metal, and to prevent the lattice brick from falling off. It is possible to suppress wear of the heat tube of the waste heat boiler.

[Brief description of drawings]

FIG. 1 is a partially cutaway side view of a lattice type dust remover of the present invention.

FIG. 2 is an AA view of FIG.

FIG. 3 is a development view of the hanging metal article of the present invention.

FIG. 4 is a cross-sectional view of a water supply pipe and drain pipe connection portion of the hanging hardware of the present invention.

FIG. 5 is a schematic explanatory diagram of a coke dry fire extinguishing facility.

FIG. 6 is a side view of a conventional lattice brick.

FIG. 7 is a detailed cross-sectional top view of a conventional hanging rod of lattice brick.

[Explanation of symbols]

 1,51 Lattice bricks 2 Collection grooves 3,4,5 Bricks 6 Hanging hardware 7 Partition plates 8 Outer pipes 9 Inner pipes 10 Double pipes 11,52 Hanging rods 12 Water supply pipes 13 Drain pipes 31 Pre-chamber 33 Circulation Gas blower 34 Coke outlet 35 Cooling chamber 36 Cooling tower 37 Small flue 38 Circular flue 39 Primary dust remover 40 Flue 41 Waste heat boiler 42 Dust collector 43 Blower

Claims (1)

[Scope of utility model registration request] 1. A lattice type dust remover provided in a passage of high temperature gas introduced into a boiler from a cooling tower of a coke dry fire extinguisher, wherein a ceramic brick having a collecting groove on an upstream side surface and a concave portion on a downstream side upper surface. A brick having a ridge, a brick having a convex portion on the upper and lower surfaces of the downstream side, and a brick having a concave portion on the lower surface of the downstream side, and a double brick that penetrates the lattice brick and is vertically divided into two by a partition plate. A lattice type dust remover for coke dry fire extinguishing equipment consisting of a hanging hardware with a hanging rod built in the center of the pipe, and a water supply pipe and a drain pipe connected to the upper end of the double pipe.