KR101560714B1 - Production method of water cooling type fire grate, and structure produced using the same - Google Patents

Production method of water cooling type fire grate, and structure produced using the same Download PDF

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Publication number
KR101560714B1
KR101560714B1 KR1020150072944A KR20150072944A KR101560714B1 KR 101560714 B1 KR101560714 B1 KR 101560714B1 KR 1020150072944 A KR1020150072944 A KR 1020150072944A KR 20150072944 A KR20150072944 A KR 20150072944A KR 101560714 B1 KR101560714 B1 KR 101560714B1
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South Korea
Prior art keywords
flow
cooling
base body
cooling water
water
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KR1020150072944A
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Korean (ko)
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박도원
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지이큐솔루션 주식회사
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23H—GRATES; CLEANING OR RAKING GRATES
    • F23H3/00—Grates with hollow bars
    • F23H3/04—Grates with hollow bars externally cooled, e.g. with water, steam or air
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D25/00—Special casting characterised by the nature of the product
    • B22D25/06—Special casting characterised by the nature of the product by its physical properties
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23H—GRATES; CLEANING OR RAKING GRATES
    • F23H2700/00—Grates characterised by special features or applications
    • F23H2700/009—Grates specially adapted for incinerators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23H—GRATES; CLEANING OR RAKING GRATES
    • F23H2900/00—Special features of combustion grates
    • F23H2900/03021—Liquid cooled grates

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • General Engineering & Computer Science (AREA)
  • Incineration Of Waste (AREA)

Abstract

The present invention relates to a water-cooled grate, and more particularly, to a water-cooled grate for improving the efficiency of product manufacturing and cooling efficiency by improving the manufacturing process (structure) of a water-cooled grate for the complete combustion of waste in a waste treatment process using a stoker type incinerator. And a water-cooled grate made by the method.
The water-cooled grate of the present invention for this purpose is a water-cooled grate for performing the function of completely burning the waste put into the combustion chamber in the state of being mounted in the combustion chamber of the stoker type incinerator, A base body which is a metal plate having a metal plate and is bent at one end in the longitudinal direction to form a space open to the lower side; A metal plate-like cross cover having one end tip bent in an "a " shape so as to be connected to the lower portion of the base body to shield the space portion; And a cooling flow passage provided between the base body and the cross cover in accordance with the assembling and joining of the base body and the cross cover so that a flow of flow of cooling water for circulation, circulation, and outflow for cooling the image surface is continued .

Description

[0001] The present invention relates to a method of producing a water-cooled grate and a water-cooled grate produced by the method,

The present invention relates to a water-cooled grate, and more particularly, to a water-cooled grate for improving the efficiency of product manufacturing and cooling efficiency by improving the manufacturing process (structure) of a water-cooled grate for the complete combustion of waste in a waste treatment process using a stoker type incinerator. And a water-cooled grate made by the method.

Domestic waste (municipal waste, hereinafter referred to as "wastes") is a waste that is mostly discharged from the household. In the Waste Management Act (Law 13038), wastes are defined as wastes other than workplace wastes. According to the 2008 Ministry of Environment statistics, 52,072 tons (1.04 kg / person · day) of waste is generated per day, and it is disposed of as incineration, landfill and recycling.

However, the landfill rate is decreasing due to the difficulty in securing landfill sites, and the incineration rate, which can extend the life of the landfill, is increasing. In addition, incineration facilities are gradually increasing in each municipality by promoting the installation of waste incineration facilities. Currently, there are 35 waste incineration facilities in operation in Korea, which can incinerate 12,710 tons (t) a day.

On the other hand, the wastes brought into the incineration facilities are changed due to changes in the waste management policy such as the waste amount system, producer responsibility recycling system, separate collection, and prohibition of bringing in garbage. Especially, the moisture content decreased due to the separation of food waste and the heating value increased accordingly.

On the other hand, incineration facilities operated before 2000 among the waste incinerators of the whole country have a heat value of 2,300 kcal / kg or less. This is thought to be due to the low calorific value of the waste at the time of installation of the incineration facility. However, current waste has been increased to 2,794 kcal / kg annually due to high calorific value, which is different from the existing design values, causing various problems in incineration facilities.

For example, high-calorific waste increases the heat load of the incinerator, causing damage to the incinerator and downstream equipment, requiring frequent repair. In addition, since the incineration capacity is lowered, it leads to a low operation rate. Therefore, it is necessary to operate the facilities stably by improving the incineration capacity by supplementing the facility structure.

Meanwhile, the waste disposal method using the incinerator is classified into a Stoker incinerator, a rotary kiln incinerator, a fluidized bed incinerator, and a liquid injection incinerator depending on the kind of waste and throughput. The stoker type incinerator is advantageous in that it can be easily constructed by disposing the waste on a fire grate and incinerating a wide range of waste from low calorific value to high calorific value.

In addition, it can process a large amount of waste in comparison with various other processing methods described above, and is widely used in a large incinerator. In the domestic, the stoker type incinerator is generally used in the waste treatment, and the cooling of the overheated grate during the combustion of waste using high temperature and high temperature is an air-cooling type in which the grate is cooled by the combustion air and a water cooling type in which the grate is cooled by the cooling water circulation .

The air-cooling type grate causes a problem that the damage to the grate (high-temperature corrosion) is fast due to the lack of cooling function due to the limitation of the cooling efficiency by the combustion air, which greatly affects the durability of the product. Alternatively, the water-cooled grate may circulate the cooling water continuously to maintain the surface (image plane) temperature at a constant level, thereby reducing durability deterioration and prolonging the life of the product.

Based on these technical ideas, Korean Patent Laid-Open Publication No. 10-2006-0126127 discloses a method of burning waste in a high-temperature combustion temperature state while minimizing contaminants generated from the combustion gas, and using a movable water-cooling jacket or a water- A fixed water-cooled grate has been disclosed which is capable of preventing abrasion due to the movement of the grate itself and rupture of the water-cooled pipe when the grate is used.

However, the fixed water-cooled grate according to the related art has a structure in which the grate surface of the grate is cooled by circulating the cooling water in a zigzag manner along the diaphragm installed inside the grate, so that the circulation efficiency Has not been able to support as much cooling efficiency as needed in an incinerator facility.

As a result, damage to the grate due to the high-temperature corrosion caused by the conventional air-cooled type grate and the shortening of the life time of the product resulted in lowering the entire life of the incineration facility. Thus, the incineration facility, Which is a major obstacle to the control of pollutants in the exhaust gas generated during the burning waste treatment process.

Furthermore, due to the above-described problems, nickel-chrome steel, which is expensive and resistant to high temperature corrosion due to the inability to cool the grate to 400 ° C or less, is inevitably employed as the main material of the grate Technological limitations in production have led to an increase in the cost of construction of incineration plants, as well as an increase in the economic burden of rising waste treatment costs.

Korean Patent Publication No. 10-2006-0126127 (published date: December 07, 2006)

It is an object of the present invention to solve the above-mentioned problems, and it is an object of the present invention to provide a method of separating a grate structure into a base body and a cross cover, The present invention provides a water-cooled grate manufacturing method which can greatly improve the functionality and durability of a product while reducing the material cost by differentiating the material of the base body directly affected by the heat and the cross cover of the other body.

Another object of the present invention is to provide a cooling passage for cooling water circulation between the base body and the cross cover so that the flow of the cooling water in the cooling passage forms a pattern in the order of inflow, So that the cooling water retention time and the circulation water amount can be sufficiently secured.

In order to accomplish the above object, the present invention provides a method of manufacturing a water-cooled grate for performing a function of causing waste to be injected into the combustion chamber to be completely burned while being mounted in a combustion chamber of a stoker type incinerator, A first step of fabricating a metal plate type base body having a flat image surface on which the waste is placed, and one end of which is bent in a "⊃" shape so that an open space is provided on the lower side; A second step of fabricating a metal plate-shaped cross cover having one end folded in an " a "shape so as to be connected to the lower portion of the base body so as to shield the space portion; And a third step of joining the base body and the cross cover to each other and joining them together by welding after assembling the base body and the cross cover manufactured in the first and second steps, .

In addition, the base body manufactured in the first step has a high heat-resisting abrasion resistant steel (SCH11 to SCH22 kind) that can withstand high temperature and high heat generated when waste is burned.

In addition, the cross cover manufactured in the second step differs from the base body and the material in heat-resistant wear-resistant steel (SCH01 to SCH02) in consideration of the characteristics that are not directly affected by high temperature and high heat.

The present invention also provides a water-cooled grate for performing a function of causing waste to be injected into the combustion chamber to be completely burned while being mounted in a combustion chamber of a stoker type incinerator. The water-cooled grate is a metal plate having a flat image surface, A base body having a space opened to the lower side by being bent in a "⊃" shape at one end in the longitudinal direction; A metal plate-shaped cross cover having one end folded in an "a " shape so as to be connected to the lower portion of the base body to shield the space portion; And a cooling flow passage provided between the base body and the cross cover in accordance with the assembling and joining of the base body and the cross cover so that a flow of flow of cooling water for circulation, circulation, and outflow for cooling the image surface is continued .

The base body includes a flat plate portion having the image surface and a plurality of bent portions bent in a "? "Shape from one end in the longitudinal direction of the flat plate portion to support a vertical end of the cross cover, And a plurality of side wall portions bent downward from both ends in the width direction of the flat plate portion so as to cover both the lower space of the flat plate portion and both ends of the bending portion inner space at the same time A partition wall for partitioning the cooling flow passage into a plurality of cooling passages so as to divide the flow of the cooling water is formed in the center of the lower surface of the flat plate portion corresponding to the image plane, And the plurality of spaces in the cooling passage divided in both directions by the partition wall are communicated with each other Such that the other space is further formed.

In addition, the cooling passage includes a first induction zone for guiding an initial flow immediately after the inflow of the cooling water and the inflow of the cooling water into the partition according to the projection of the partition wall, and a second induction zone for guiding the cooling water movement flow from the first induction zone to the inflow- And a third induction zone for guiding the circulation flow of the cooling water in the second induction zone to the flow immediately before the outflow and to the final flow of the outflow.

In addition, the cross cover is formed by bending one end in the longitudinal direction in the shape of the letter "A " and passing through a hole adjacent to the end of the horizontal part for the entrance and exit of the cooling water, thereby improving the flatness and the strength of suppressing warpage, An inner rib protruding along the longitudinal direction on the upper surface of the horizontal portion so as to form a moving flow in which cooling water is homogenized by a plurality of routes in each space in the cooling passage divided by the partition, And is further protruded along the longitudinal direction on the lower surface of the horizontal portion facing the rib.

In addition, the flat plate portion is provided with at least one positioning protrusion formed at a predetermined height protruding from the image surface on the other side opposite to the bent portion, for positioning and preventing flow of other grate, In the bent portion, at least one projection receiving groove in which the positioning projections are internally held and held is formed at a predetermined interval on the bottom surface of the outermost flat plate portion.

A guide portion extended in a "T" shape is formed at an end portion of the partition wall to induce a pressure rise and a pressure relief action of the cooling water passing through the cooling passage.

In addition, the through hole is combined with an inflow hole penetrated to allow the cooling water to flow into the cooling passage and an outflow hole penetrating the cooling water flowing through the inflow hole so as to be finally discharged after the circulating flow.

The inner rib is provided with a curved portion that controls the flow of cooling water outwardly from the end portion and is disposed at a position for evenly dividing the space between the inner wall surface of the side wall portion and the end of the guide portion, Do not induce the phenomenon.

In addition, each of the corner inner side portions of the guide portion is formed of a curved surface in the form of a round, which prevents a vortex phenomenon that may occur due to the fluctuation of the flow of the cooling water.

As can be clearly understood from the above description, the water-cooled grate manufacturing method and the water-cooled grate manufactured by this method maximize the efficiency of the manufacturing process due to the easy removal of the residues during casting by achieving a structure in which the base body and the cross cover are separated from each other By differentiating the material considering the characteristics of each part, it is possible to reduce the production cost, further reduce the construction cost of the incineration facility in the short term, and greatly reduce the cost of maintenance and operation of the incineration facility in the long term Effect.

In addition, since the flow of the cooling water (inflow, circulation, and outflow) in the cooling passages provided in the inside of the base body and the cross cover is concretely and efficiently formed, the superheated surface The surface of the substrate is sufficiently heated to prevent corrosion at a high temperature, thereby increasing the durability of the product.

In addition, by solving the problem of grate failure caused by achieving various effects as described above, stability of operation of incineration facility is reduced through reduction of manpower for maintenance and reduction of time, and operation time of incineration equipment This is a very useful invention that can contribute greatly to lead the industry that is related to waste disposal as well as the eco-friendly industry.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing a step-by-step process for producing a water-cooled grate according to the present invention;
Figs. 2 to 3B Exploded perspective view, side sectional view and bottom view showing the coupling relationship and constitutional relationship of the water-cooled type grate according to the present invention. Fig.
4A and 4B are a side sectional view and a bottom view showing the structure of the base body in the water-cooled type grate according to the present invention.
5A to 5C are bottom, side and rear views of the structure of a cross cover in the water-cooled type grate according to the present invention.
6 is an exemplary view showing a cooling passage provided inside the base body and the cross cover assembly in the water-cooled type grate according to the present invention.
7 and 8 are use state diagrams showing an embodiment of a water-cooled grate according to the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily carry out the present invention. First, in adding reference numerals to the constituents of the drawings, it is to be noted that the same constituents are denoted by the same reference numerals as much as possible even if they are displayed on different drawings. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

FIG. 1 is a block diagram showing a step-by-step method for manufacturing a water-cooled type grate according to the present invention, and FIGS. 2 to 3B are an exploded perspective view, a side sectional view and a bottom view showing an engaging relationship and a constitutional relationship of the water- FIGS. 4A and 4B are a side sectional view and a bottom view showing the structure of the base body in the water-cooled type grate according to the present invention, FIGS. 5A to 5C are views showing the bottom surface of the cross cover in the water- FIG. 6 is an exemplary view illustrating a cooling passage provided inside the base body and the cross cover assembly in the water-cooled type grate according to the present invention, and FIGS. 7 and 8 are views showing examples of the water- Fig. 10 is a use state diagram showing an embodiment of a grate.

As shown in FIG. 1, the method of manufacturing a water-cooled grate according to the present invention is a method of manufacturing a water-cooled grate for performing a function of completely burning a waste put into the combustion chamber in a state of being mounted inside a combustion chamber of a stoker type incinerator A casting process for casting a metal plate type base body having a flat image surface on which input waste is placed and having one end portion bent in a "⊃" shape so that an open space is provided on the lower side A second step (S200) of fabricating a metal plate-type cross cover having one end folded in an " a "shape so as to cover the space portion by being connected to the lower portion of the base body by a casting method, And the base body and the cross cover manufactured in the first and second steps S100 and S200 are assembled together and welded to each other by a welding process, 'S are joined to each other in close contact area between the cover and a second stage 3 (S300), which are integrated.

The base body manufactured through the first step S100 includes a high heat-resisting wear-resistant steel (SCH11) which can withstand the high temperature and high heat generated when the waste put into the combustion chamber is burnt on a horizontally flat image surface ~ SCH22 species) as the material, it is desirable to prevent deformation of the product due to overheating.

The cross cover manufactured through the second step (S200) adopts a heat-resistant wear-resistant steel (SCH01 to SCH02) different from the material of the base body in consideration of characteristics not directly affected by high temperature and high temperature .

This solves the causes of the cost and cost of the unit cost due to the adoption of expensive high-temperature wear-resistant steel (SCH11 to SCH22), which is an expensive material, as well as an internal structure The production of products using casting methods is complicated and the removal of the residues at casting, that is, the molding sand (elimination) is desperately needed.

In the third step S300, the base body and the cross cover, which are separately manufactured through the first and second steps S100 and S200, respectively, The cross cover is positioned on the lower side of the base body and welding is performed to the portions where the cross covers are in close contact with each other. Thus, the process can be completed, and thus the inner space between the base body and the cross cover An enclosed internal space through which cooling water can be circulated is provided.

2 to 3B, the water-cooled grate A according to the present invention manufactured by the above-described manufacturing method is a metal plate having an image surface on which solid waste put into the combustion chamber is placed, And a cross cover (1) bent at one end in the longitudinal direction so as to shield the lower portion of the base body (1) 2 and a cooling flow path 3 (hereinafter, referred to as " cooling water flow path ") provided so that the flow of cooling water flowing, circulating and flowing out for cooling of the image surface is continued between the base body 1 and the cross cover 2 ).

4A and 4B, the base body 1 serves to perform the function of allowing the waste to be completely burned by agitating the waste in a state in which a plurality of the waste are arranged and fixed on the stocker in the incinerator. A flat plate portion 11 having a horizontally flat image surface 10 which is capable of supporting a flat surface portion 11 of the flat plate portion 11 and a flat plate portion 11 which is supported by a vertical end of the cross cover 2 by being bent in a " A folded portion 12 which is provided on the inner side of the cross cover 2 so as to provide a closed space portion when the cross cover 2 is assembled and joined together, and a bent portion 12 which is bent downward from both ends in the width direction of the flat plate portion 11, A plurality of sidewall portions 13 for covering the lower space and both ends of the space inside the bending portion 12 are formed.

The flat plate portion 11 is formed with a predetermined height protruding from the image surface 10 on the other side opposite to the bent portion 12 so that the position of another grate that is continuously stacked and the position of the other grate , One or more positioning projections (111) for preventing rightward flow are arranged at regular intervals.

It is preferable that a first step 112 capable of fitting the horizontal end of the cross cover 2 is formed at an inner edge of a portion protruding downward from the lower surface so as to face the positioning projection 111.

In addition, a partition wall 113 partitioning the cooling passage 3 into a plurality of cooling passages to divide the flow of the cooling water is formed at the lower center of the lower surface corresponding to the image plane 10, (12). This is so that a third other space communicating with a plurality of spaces divided in both directions of the partition wall 113 is further provided so that the flow of the flow of the cooling water through the circulation and circulation flows.

In addition, the finishing end portion of the partition wall 113 has a "T" -shaped shape extending to both sides, so that the pressure of the cooling water having the movement flow after the flow in the cooling channel 3 and the pressure A guiding portion 113-1 is formed to increase the residence time of the cooling water and to secure the circulation water so that the heat absorption for the cooling of the base body 11 is sufficient.

In addition, the corner inner side portions along the "T" shape extending to both sides are formed with rounded curved surfaces 113-11 preventing turbulence, which may occur due to abrupt fluctuations of the flow of the cooling water, (113-12).

At least one or more protrusion receiving grooves 121 are formed in the bent portion 12 at predetermined intervals on the bottom surface of the outermost flat plate portion so that the positioning protrusion 111 can be internally received and restrained, A second step 122 is formed at an upper end of the flat plate portion on which the projection receiving groove 121 is formed. The second step 122 can fit the other end of the cross cover 2.

A shaft receiving groove 131 surrounding the support bar b provided on the stocker for supporting the grate is formed on the side wall part 13 on the opposite side of the bending part 12, A cutout groove 132 for passing the cooling water supply hose for supplying cooling water to other adjacent grateers is formed in the middle between the cutout groove 132 and the shaft receiving groove 131, On both sides thereof, an assembly hole 133 for fastening bolts and nuts for closely assembling gates to each other is formed (see Fig. 7).

The cross cover 2 is for bonding the lower portion of the base body 1 to the lower body so that the cooling channel 3 is provided below the base body 1. In the cross cover 2 shown in Figures 5A to 5C Likewise, the one end in the longitudinal direction is bent in the shape of "a " while the through hole 2a for passing the cooling water in and out is formed in the vicinity of the end of the horizontal part to improve the oblateness and suppress the bending deflection And an inner rib 21 for allowing the cooling water to form a homogenized flow of the cooling water in a plurality of roots in each space in the cooling passage 3 divided by the partition 113, And an outer rib 22 for further reinforcing the strength is further formed on the lower surface of the horizontal portion facing the inner ribs 21 along the longitudinal direction.

It is preferable that a tube coupler 23 for connecting a supply hose for connecting cooling water circulated for cooling the base body 1 to another grate is further tightened to the through hole 2a.

The through hole 2a-1 is formed so as to allow cooling water to flow into the cooling passage 3, and the cooling water introduced through the inlet hole 2a- And an outlet hole 2a-1 penetrated so as to be finally discharged after continuing the flow.

Like the guide portion 113-1 of the partition 113, the curved portion 211 for controlling the flow of the cooling water is bent outward from the end portion of the inner rib 21, Is disposed at a position where the space between the inner surface of the side wall portion 13 of the base body 1 and the end portion of the guide portion 113-1 is evenly divided, A cross sectional area c-1 from the side wall portion 13 to the inner rib 21 and the curved surfaces 113-11 and 113-12 of the inner rib 21 and the guide portion 113-1, (C-2) are equal to each other so that channeling (drifting) phenomenon does not occur when passing through the cooling water.

The cooling flow path 3 is formed by connecting the flow of the cooling water for cooling the base body 1 in the internal space between the base body 1 and the cross cover 2 to the flows of flowing, As shown in FIG. 3B and FIG. 6, the cooling water is divided in accordance with the protrusion of the partition 113 of the base body 1, A second induction zone (31) for guiding the initial flow immediately after the introduction, a second induction zone (32) for connecting the flow of the cooling water from the first induction zone (31) to the circulation flow before the outflow, And a third induction zone 33 for guiding the circulation flow of the cooling water in the second induction zone 34 to the flow immediately before the outflow and to the final flow of the outflow.

Hereinafter, the operation of the water-cooled grate A according to the present invention will be described in detail.

8, the stoker type incinerator 800 is provided with a hopper 810 for charging wastes, and has a discharge port 830 for discharging waste incinerated in the combustion chamber 820 And a water-cooled grate A of the present invention is disposed below the combustion chamber 820 for performing a function of completely burning the waste put into the combustion chamber 820 by the hopper 810.

The water-cooled grate A of the present invention reciprocates by the stocker 810 and transports the waste disposed thereon to the discharge port 830. The waste to be transported is transferred to the discharge port 830 through the combustion chamber Is completely burned by the radiant heat of the flame generated inside the burner 820, and the remaining ash is finally exhausted through the exhaust port 830.

During the process, the base body 1 of the water-cooled type grate A of the present invention is overheated due to radiant heat (high temperature and high temperature) and heat source generated in the process of burning the waste. The base body 1 is supplied from a supply hose connected to a tube coupler 23 fastened and assembled to the cross cover 2 and has a cooling channel 3 provided between the base body 1 and the cross cover 2 It can be cooled by passing cooling water.

More specifically, as shown in Fig. 6, the cooling water supplied from the supply hose is introduced into the cooling passage 3 through the inflow hole 2a-1 in which the tube coupler 23 is fastened and assembled , And the cooling water thus entered continues the cyclic movement flow by the second induction zone 32 in the movement flow along the first induction zone 31 of the cooling channel 3 and moves along the third induction zone 33 And flows out through the tube coupler 23 fastened and assembled to the outflow hole 2b-2.

At this time, it is possible to homogenize the flow by forming a plurality of routes by the inner ribs 21 of the cross cover 2 in the process of moving the cooling water along the first induction zone 31, (113-11) 113-12 of the guide portion 113-1 formed at the end of the partition wall 113 of the base body 1 and the curved surface 113-11 of the inner rib 21 The vortex phenomenon is prevented as the direction of the moving flow is gently guided by the curved portion 211 formed in the curved portion 211.

On the other hand, since the lateral area of the end point of the first induction zone 31 becomes narrow due to the formation of the guide portion 113-1, the flow of the cooling water is slowed down, The circulating water quantity is sufficiently secured.

The cooling water having passed through the first induction zone 31 enters the third induction zone 33 through the second induction zone 32. The cooling water flowing in the lateral direction The pressure is relaxed by the acceleration of the flow of the cooling water passing through the starting point of the third induction zone 33 having a narrow area, whereby the circulation efficiency of the cooling water is improved.

In summary, the first and second and third induction zones 31, 32, and 33, which divide the cooling passage 3, are used to secure the residence time and the circulation amount of the cooling water, So that the grate surface of the base body 1 can be effectively cooled.

As a result, the water-cooled grate manufacturing method according to the present invention and the water-cooled grate manufactured by this method can be manufactured by easily changing the structure of the grate separated from each other by the base body 1 and the cross cover 2 The efficiency of the process can be maximized, but the division of the material considering the functional characteristics of each part can greatly reduce the production cost of the product as well as the cost of constructing the incineration facility.

In addition, since the flow of the cooling water in the cooling channel 3 provided inside the base body 1 and the cross cover 2 is concretely and efficiently performed by flowing, circulating, and flowing out, As the heat absorbing power for lowering the temperature of the image plane 10 of the overheated base body 1 during combustion is sufficient, high temperature corrosion of the grate can be prevented and the durability of the product can be increased.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit and scope of the invention as defined by the appended claims. will be. Therefore, the embodiments disclosed in the present invention and the accompanying drawings are intended to illustrate and not to limit the technical spirit of the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments and the accompanying drawings . The scope of protection of the present invention should be construed according to the following claims, and all technical ideas within the scope of the claims should be construed as being included in the scope of the present invention.

A: Grate, 1: Base body, 2: Cross cover
2a: Through hole, 2a-1: Inlet hole, 2a-2: Outlet hole
3: cooling flow path, 10: image surface, 11:
12: bent portion, 13: side wall portion, 21: inner rib
22: outer rib, 23: tube coupler, 31: first induction zone
32: second induction zone, 33: third induction zone, 111: positioning projection
112: first step, 113: partition, 113-1: guide part
113-11, 113-12: curved surface, 121: projection receiving groove, 122: second step
131: shaft receiving groove, 132: cutting groove, 133:
211: Bend, S100: First step, S200: Second step
S300: Step 3

Claims (12)

A method of manufacturing a water-cooled grate for performing a function of causing waste to be injected into the combustion chamber to be completely burned while being mounted inside a combustion chamber of a stoker type incinerator,
A first step of fabricating a metal plate type base body having one end portion bent in a "⊃" shape so that an open space is provided on the lower side with a flat image surface on which the input waste is placed;
A second step of fabricating a metal plate-shaped cross cover having one end bent in an "a " shape so as to shield the open space of the base body by being connected to the lower portion of the base body by casting; And
Wherein the base body and the cross cover are integrally assembled and welded together so that the base body and the cross cover are adhered to each other to form an integrated body, And a third step of forming a cooling flow path between the cover and the cooling flow path for allowing the flow of the cooling water for cooling the image surface to continue,
In the first step,
Wherein the base body comprises:
A flat plate portion having the image surface,
A bending portion which is bent in a "⊃" shape from one end in the longitudinal direction of the flat plate portion to support a vertical end of the cross cover so as to support the cross, and a closed space portion is provided inside when the cross cover is assembled and joined;
A plurality of side wall portions bent downward from both ends in the width direction of the flat plate portion so as to cover both the lower space of the flat plate portion and both ends of the bending portion inner space,
Wherein a partition wall for partitioning the cooling passage into a plurality of cooling passages so as to divide the flow of the cooling water is formed in the center of the lower surface of the flat plate portion corresponding to the image plane, Wherein the space is divided into two directions by the partition so as to form another space communicating with a plurality of spaces in the cooling passage.
The method according to claim 1,
Wherein the base body manufactured in the first step is made of a high-temperature resistant wear-resistant steel which is resistant to high temperature and high heat generated when waste is burned.
The method according to claim 1,
Wherein the cross cover made in the second step is different from the base body and the material in the presence of heat resistant abrasion resistant steel in consideration of characteristics that are not directly affected by high temperature and high temperature.
A water-cooled grate for performing a function of causing waste to be injected into the combustion chamber to be completely burned by being mounted inside a combustion chamber of a stoker type incinerator,
A base body which is a metal plate body having a flat image surface on which the waste wastes are placed and in which one end in the longitudinal direction is bent in a "
A metal plate-shaped cross cover having one end bent in an "a " shape so as to be shielded from the open space of the base body by being connected to a lower portion of the base body; And
And a cooling flow passage provided between the base body and the cross cover in accordance with assembly and joining between the base body and the cross cover so that a flow of flow of cooling water for circulation, circulation, and outflow for cooling the image surface is continued ,
Wherein the base body includes a flat plate portion having the image plane,
A bending portion that is bent in a "⊃" shape from one end in the longitudinal direction of the flat plate portion to support a vertical end of the cross cover so as to support the cross support, and a closed space portion is provided inside when the cross cover is assembled and joined;
A plurality of sidewall portions that are bent downward from both ends in the width direction of the flat plate portion and which block the lower space of the flat plate portion and both ends of the bent portion inner space at the same time,
Wherein a partition wall for partitioning the cooling passage into a plurality of cooling passages so as to divide the flow of the cooling water is formed in the center of the lower surface of the flat plate portion corresponding to the image plane, So that another space communicating with the plurality of spaces in the cooling passage divided in both directions by the partition is further formed.
delete 5. The method of claim 4,
Wherein the cooling passage includes a first induction zone for guiding an initial flow immediately after inflow of the cooling water and immediately after the inflow of the cooling water,
A second induction zone connecting the cooling water movement flow from the first induction zone to the preflow flow circulation flow,
And a third induction zone for guiding the circulation flow of the cooling water in the second induction zone to the flow immediately before the outflow and to the final flow of the outflow.
5. The method of claim 4,
The cross cover has one end in the longitudinal direction and is bent in an "a" shape,
A through hole for allowing the cooling water to flow in and out is formed in the vicinity of the horizontal portion leading end,
An inner rib which is formed so as to form a moving flow in which cooling water is homogenized by a plurality of routes in each space in the cooling passage divided by the partition wall is formed on the upper surface of the horizontal portion so as to protrude along the longitudinal direction Lt; / RTI &
Wherein an outer rib for further reinforcing the strength is further formed along the longitudinal direction on the lower surface of the horizontal portion facing the inner rib.
5. The method of claim 4,
The flat plate portion is provided with at least one positioning protrusion formed at a predetermined height protruding from the image surface on the other side opposite to the bent portion so as to position and prevent flow of other grate,
Wherein the bending portion is formed with at least one projection receiving recess in which the positioning protrusions are internally contained and constrained at regular intervals on the bottom surface of the outermost flat plate portion.
8. The method of claim 7,
Wherein a guide portion extended in a "T" shape is formed at an end of the partition wall so as to cause a pressure rise and a pressure relief action of the cooling water passing through the cooling passage.
8. The method of claim 7,
The through hole includes an inlet hole penetrating the cooling passage to allow cooling water to flow into the cooling passage,
Wherein the cooling water flowing through the inflow hole is combined with an outflow hole penetrated to be finally discharged after the circulating flow.
10. The method of claim 9,
A curved portion for controlling the flow of the cooling water is bent outward from an end portion of the inner rib,
Wherein the cooling water is disposed at a position where the space between the inner wall surface of the side wall part and the end of the guide part is evenly divided so that no drift phenomenon is caused when the cooling water passes through.
10. The method of claim 9,
Wherein each of the corner inner side portions of the guide portion is formed of a rounded curved surface that prevents a vortex phenomenon that may occur due to fluctuations in the flow of the cooling water.
KR1020150072944A 2015-05-26 2015-05-26 Production method of water cooling type fire grate, and structure produced using the same KR101560714B1 (en)

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KR101616747B1 (en) * 2016-03-21 2016-04-29 주식회사 세원특수금속 Mold for the production of master alloy
KR101701720B1 (en) * 2016-06-20 2017-02-03 지이큐솔루션 주식회사 Water cooling type fire grate and incinerator with storker for water cooling type fire grate
KR101922835B1 (en) * 2018-03-07 2018-11-27 남창호 Water-cooled stocker apparatus with cooling path
CN109306269A (en) * 2018-11-19 2019-02-05 中冶焦耐(大连)工程技术有限公司 A kind of upright furnace cooling equipment of special-shaped guide
KR20210073127A (en) 2019-12-10 2021-06-18 (주)영신특수강 Fabricating method of water-cooled grate with integrated cooling channel
KR102460508B1 (en) 2022-05-19 2022-10-31 (주)이씨티 Improved water cooling efficiency water cooling grate
KR20230027552A (en) * 2021-08-19 2023-02-28 박준형 Water Cooled Fire Grate Bar for Stoker Combustion Furnace
KR102535956B1 (en) 2022-11-23 2023-05-30 주식회사 성광이엔에프 Large water-cooled grate of heat-resistant for incinerator

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KR101277484B1 (en) * 2012-11-22 2013-06-21 (주)태종 A grate
KR101438578B1 (en) * 2014-05-22 2014-09-12 지이큐솔루션 주식회사 Grate bar and stoker and incinerator having the same

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KR101277484B1 (en) * 2012-11-22 2013-06-21 (주)태종 A grate
KR101438578B1 (en) * 2014-05-22 2014-09-12 지이큐솔루션 주식회사 Grate bar and stoker and incinerator having the same

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101616747B1 (en) * 2016-03-21 2016-04-29 주식회사 세원특수금속 Mold for the production of master alloy
KR101701720B1 (en) * 2016-06-20 2017-02-03 지이큐솔루션 주식회사 Water cooling type fire grate and incinerator with storker for water cooling type fire grate
KR101922835B1 (en) * 2018-03-07 2018-11-27 남창호 Water-cooled stocker apparatus with cooling path
CN109306269A (en) * 2018-11-19 2019-02-05 中冶焦耐(大连)工程技术有限公司 A kind of upright furnace cooling equipment of special-shaped guide
CN109306269B (en) * 2018-11-19 2024-03-19 中冶焦耐(大连)工程技术有限公司 Abnormal shape guide cooling arrangement for vertical furnace
KR20210073127A (en) 2019-12-10 2021-06-18 (주)영신특수강 Fabricating method of water-cooled grate with integrated cooling channel
KR20230027552A (en) * 2021-08-19 2023-02-28 박준형 Water Cooled Fire Grate Bar for Stoker Combustion Furnace
KR102508354B1 (en) * 2021-08-19 2023-03-09 박준형 Water Cooled Fire Grate Bar for Stoker Combustion Furnace
KR102460508B1 (en) 2022-05-19 2022-10-31 (주)이씨티 Improved water cooling efficiency water cooling grate
KR102535956B1 (en) 2022-11-23 2023-05-30 주식회사 성광이엔에프 Large water-cooled grate of heat-resistant for incinerator

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