KR20200002294U - Installation structure of falling stage of stoker-type incinerator - Google Patents

Abstract

The present invention relates to the installation structure of a stocker incinerator. The installation structure includes a castable refractory block; And a frame assembly fixed to an incinerator internal facility to support the castable refractory block, wherein the frame assembly and the castable refractory block accommodated therein are installed so as to cover the entire stepped portion of the falling end. do. In addition, the installation structure further includes a maintenance key, and the maintenance key is characterized in that it is removable and attachable to a recess provided in a lower portion of the frame assembly. According to the installation structure for the incinerator for the stocker type incinerator according to the present invention, the installation cost is reduced by configuring most of the steps of the free end with castable fireproof materials, except for the upper surface of the lower moving end and the minimum space. It can be greatly reduced, and nevertheless, by introducing a shelf-type frame assembly to firmly accommodate, fix, and support the castable refractory block, the durability of the entire fall block made of the castable refractory block is improved even in a high temperature and high vibration environment. Thus, operation and maintenance costs can also be reduced. In addition, it can be widely applied to general wastes, industrial wastes with a lot of clinker generation, and incinerators for the same, through improved durability against fall breaks. In addition, when most of the steps of the fall ends are made of castable refractory material that cannot be removed arbitrarily, the problem that it is difficult to replace the damaged grate at the bottom of the fall cuts is that a depression is formed in the lower part of the support frame, and the detachable part is possible. It can be effectively resolved by having at least one maintenance key.

Description

Installation structure of fall block of stocker incinerator {INSTALLATION STRUCTURE OF FALLING STAGE OF STOKER-TYPE INCINERATOR}

The present invention relates to an installation structure for a drop end forming the boundary of each incineration end in a stocker type incinerator.

In general, waste such as household or industrial waste is incinerated using the stocker type incinerator 1 of FIG. 1. Stocker type incinerator (1) is a device for transporting combusted waste and has a stocker in the incineration chamber (70), and such a stocker is divided into a fixed end (10F) and a moving end (10M), and a grate that is alternately arranged in a stepwise manner. (10) It is composed of rows and operates in a manner in which the moving end 10M moves back and forth between the fixed end 10F disposed above and below it, and moves the waste sequentially down the stairs. This stocker type incinerator (1) is suitable for large-capacity incineration, and the waste input from the upper hopper is continuously and gradually moved downward by the stocker, while convective heat from the hot air in the lower part of the stocker and the combustion gas in the furnace and radiant heat from the furnace wall are prevented. It is dried and ignited and incinerated.

Meanwhile, in such a stocker type incinerator (1), the entire incineration stage is designed by being divided into a drying stage (DS), a combustion stage (CS), and a post-burning stage (PCS) according to a sequential detailed incineration process, and each incineration stage As a result, the stocker is operated independently. In this case, the boundary of each incineration end constitutes the so-called free end (FS), and the height of the free end (FS) is usually set higher than the height of the grate constituting the fixed end or moving end at each incineration end, and the fall end (FS) The row of the grate 10 immediately above is set to the fixed end (10F), and the row of the grate 10 immediately below the drop end (FS) is set to the moving end (10M).

As one of the conventional stocker type incinerator installation structures, a method of using a heat-resistant steel grate 20 for a fall cut that can completely cover the exposed step of the fall cut FS is known when referring to FIG. 2. The fall-blocking installation structure using the heat-resistant steel grates 20 can be advantageously applied not only to general wastes but also to incinerators for industrial wastes with a lot of clinker generation because clinker is attached to the minimum as an incineration by-product, and partial replacement is advantageous. In the case of the illustrated round bar 22, the heat-resistant steel grate 20 for mounting type drop-off has the advantage of easy attachment and maintenance, but basically, the heat-resistant steel grate 20 is expensive, so installation and maintenance costs increase, and the metal material prevents corrosion. Because it is easy, durability or lifespan is lower than that of ordinary castable fireproof materials, and there is a risk of being easily dropped from the mounting round bar 22 due to self-damage or frictional shock during reciprocation of the lower moving end (10M) grate 10 row. .

As an example of a lower cost fall installation structure compared to the fall installation structure of FIG. 2, a method of using the general castable refractory material of FIG. 3 is known. In the fall installation structure of FIG. 3, some of the total height of the step portion of the fall block FS is composed of a castable refractory block 30, and the remaining height is hinged to the lower part of the castable refractory block 40. This is a method of configuring with a scraper 40. In this case, in order to replace the worn-out moving end (10M) grate 10, a predetermined space must be secured between the castable refractory block 30 and the row of the moving end (10M) grate 10 below it. , The scraper 40 shields the space between the castable refractory block 30 and the row of the moving end (10M) below it and the row of the grate 10, so that the waste in the reciprocating operation of the moving end (10M) grate 10 row It plays a role in preventing this from flowing in.

In the conventional fall-blocking installation structure of FIG. 3, a large part of the fall-blocking (FS) step is constructed with a low-cost castable refractory block 30, so that the incinerator for general waste with less clinker generation is constructed at a relatively low cost. There are advantages to this possible. However, in order to replace the damaged moving end (10M) grate (10) row, a space between the castable refractory block (30) and the moving end (10M) grate (10) row below it must be essentially secured, and to compensate for this Since the scraper 40 must be provided, there is always a problem of an increase in cost due to the scraper 40 made of heat-resistant steel. In addition, although the scraper 40 is heat-resistant steel, it is a simple plate-shaped structure that itself has poor durability, and even if it is installed inclined in the direction of waste movement, the castable refractory block 30 exposed to the high-temperature environment naturally sinks downwards. As abrasion occurs during the repetitive front and rear dynamics of the moving end (10M) grate 10, the phenomenon that the castable refractory block 30 and the moving end (10M) beneath it is caught between the rows of the grate 10 and falls off frequently. As a result, there is a problem that frequent maintenance is required, and accordingly, additional losses due to the downtime of the incinerator are increased along with the cost. Moreover, since the problem of the scraper 40 dropping is further accelerated when the clinker is attached to the castable refractory block 30, the application is inevitably limited to incinerators for industrial waste with a large amount of clinker, which is an incineration by-product.

The purpose of this design is for a stocker type incinerator that can reduce the installation, operation, and maintenance costs as much as possible through improved durability and material cost reduction while improving durability and thus can be applied regardless of the type of incinerator and waste to be incinerated. It is to provide a fall-off installation structure.

In the process of developing a fall-blocking installation structure for a stocker-type incinerator related to the above-described problem, the present inventors basically designed most of the stepped parts of the fall cut-off with castable refractory materials in order to reduce the cost. And a frame assembly that can firmly accommodate, fix, and support castable refractory blocks in a high-vibration environment to improve the durability of the falling end, and form a recess in the lower part of the frame and attachable to the recessed part. It has been found that by providing at least one maintenance key, it is possible to replace the damaged moving end grate under the drop end. The present invention was made by further embodiing the mechanical design based on such an idea, and the subject matter of the present invention based on the above-described problem and the idea is the same as described in the claims.

(1) An installation structure for a drop end forming a boundary between each incineration end of a stocker-type incinerator, comprising: a castable refractory block; And a frame assembly fixed to an incinerator internal facility to support the castable refractory block, wherein the frame assembly and the castable refractory block accommodated therein are installed so as to cover the entire stepped portion of the falling end. Installation structure of a stocker-type incinerator with a drop cutoff.

(2) The frame assembly includes a base plate; A back plate extending upward from a rear edge of the base plate; And a plurality of wall plates, wherein each of the plurality of wall plates is installed at a predetermined interval, and a lower end thereof is fixed to the base plate and a rear end thereof is fixed to the back plate, thereby giving the frame assembly a shelf-type structure. The installation structure of the stocker-type incinerator according to the above (1), characterized in that.

(3) The frame assembly is provided with an anchor for fixing the castable refractory block. The installation structure of the stocker type incinerator according to the above (1).

(4) a maintenance key; and the maintenance key of the stocker type incinerator of any one of (1) to (3) above, characterized in that it is detachable to the recessed portion provided in the lower portion of the frame assembly. Installation structure of fall cutoff.

(5) The installation structure of the stocker type incinerator according to (4), characterized in that a plurality of pairs of the maintenance key and the depression are provided.

(6) The installation structure of the stocker type incinerator according to (4), wherein the maintenance key is detachably mounted on the recessed portion in a sliding manner.

(7) The lateral width of the recessed portion is the same as or larger than the width of the unit grate located directly under the lower end of the drop end, wherein the stocker-type incinerator installation structure of (4) above.

According to the installation structure for the incinerator for the stocker type incinerator according to the present invention, the installation cost is reduced by configuring most of the steps of the free end with castable fireproof materials, except for the upper surface of the lower moving end and the minimum space. It can be significantly reduced, and nevertheless, by introducing a shelf-type frame assembly to firmly accommodate, fix, and support the castable refractory block, the durability of the entire fall block made of the castable refractory block is improved even in a high temperature and high vibration environment. Thus, operation and maintenance costs can also be reduced. In addition, it can be widely applied to general wastes, industrial wastes with a lot of clinker generation, and incinerators for the same, through improved durability against fall breaks. In addition, when most of the steps of the fall ends are made of castable refractory material that cannot be removed arbitrarily, the problem that it is difficult to replace the damaged grate at the bottom of the fall cuts is that a recess is formed in the lower part of the support frame, and the detachable part is possible It can be effectively resolved by having at least one maintenance key.

1 is a schematic structural diagram of a stocker type incinerator according to the prior art.
2 and 3 are the installation structure of the drop-off end of the stocker type incinerator according to the prior art.
Figure 4 is a front view of the installation structure of the drop-off end of the sorter type incinerator according to an embodiment of the present invention.
Figure 5 is a side cross-sectional view of Figure 4;
6 is a perspective view of a frame assembly according to an embodiment of the present invention.
7 is a perspective view of a maintenance key according to an embodiment of the present invention.

Hereinafter, the present invention will be described in detail through examples. Prior to this, terms or words used in the present specification and claims should not be construed as being limited to their usual or dictionary meanings, and the designer appropriately explains the concept of terms in order to explain his own design in the best way. Based on the principle that it can be defined, it should be interpreted as a meaning and concept consistent with the technical idea of the present invention. Therefore, the configuration of the embodiments described in the present specification is only one of the most preferred embodiments of the present invention, and does not represent all the technical ideas of the present invention, and various equivalents that can replace them at the time of filing of the present invention It is to be understood that there may be variations and variations. On the other hand, in the drawings, the same or similar reference numbers are given to the same or equivalent material, and in the entire specification, when a certain part "includes" a certain component, this is another component unless otherwise stated. It does not mean that other components may be further included.

Hereinafter, for convenience of explanation, with respect to the shape or installation orientation of each component element of the stocker-type incinerator, the lower part of the staircase is forward and the upper part is rearward based on the direction in which waste (not shown) moves down along the grate column staircase. To explain.

4 and 5 show a front view and a side cross-sectional view of a fall cut installation structure of a stocker type incinerator according to an embodiment of the present invention. 6 is a perspective view of a frame assembly 40 according to an embodiment of the present invention, Figure 6 is a perspective view of the maintenance key 50 according to the embodiment of the present invention, respectively.

The installation structure for a fall cut according to the present design is intended to be applied to a stocker type incinerator. In a stocker type incinerator, as described in FIG. 1 above, the entire incineration stage is designed to be divided into a drying stage (DS), a combustion stage (CS), and a post-burning stage (PCS) according to a sequential detailed incineration process, and each incineration stage The stocker operates independently in units of stages. This stocker is divided into a fixed end (10F) and a moving end (10M), and is composed of rows of grate (10) alternately arranged in a stepwise manner, so that the moving end (10M) is located between the fixed ends (10F) disposed above and below it. It operates in a way that it moves back and forth and moves the waste down the stairs in sequence. Based on the front and rear of the fall end (FS), the row of grate 10 directly above the fall end (FS) to the rear is the fixed end (10F), and the row of the grate 10 immediately below the fall end (FS) is Each is set to a moving end (10M).

The fall-blocking installation structure basically includes a castable refractory block 30; And a frame assembly 40 supporting the refractory material block 30, wherein the frame assembly 40 is fixed to an internal facility (not shown) such as a navigator casing constituting the incinerator. The castable refractory block 30 is formed by curing a refractory material obtained by adding a binder to a fire-resistant aggregate and curing the refractory material after placing the refractory material on-site while the frame assembly 40 is installed in an internal facility. .

In order to reduce the cost required for the installation of the fall cut, the present invention prevents the use of expensive heat-resistant steel such as the grate for fall cuts of Fig. 2 or the scraper of Fig. 2 as much as possible, and the castable refractory material block 30 is used for fall cuts. While it is configured to cover most of the height of the stepped part, the castable refractory block 30 can be supported instead of simply fixing the castable refractory block 30 to the incineration facility in order to improve the durability of the fall-blocking installation structure. One of the features is that the frame assembly 40 is installed as a medium.

To this end, the frame assembly 40 and the castable refractory block 30 accommodated therein cover the entire stepped portion of the falling end except for a minimum space between the lower moving end 10M and the upper surface of the grate 10. It is installed to do. In this case, the spacing space is designed to have a minimum size so as to minimize the inflow of foreign substances while minimizing the frictional resistance between the lower surface of the free end and the upper surface of the grate 10 of the moving end (10M), and preferably 10 to It has a height of 20 mm.

In order to enhance the receiving effect of the castable refractory material block 30 in terms of improving the durability of the drop-off installation structure, the frame assembly 40 is preferably a shelf-type structure. The frame assembly 40 of the shelf-type structure includes a base plate 42; A back plate 44 extending upward from the rear edge of the base plate 42; And a plurality of wall plates 46, wherein the plurality of wall plates 46 are installed at predetermined intervals, but the lower end thereof is fixed to the base plate 42 by welding or the like, and the rear end thereof is a back plate 44 ) Is fixed. The shelf-type frame assembly 40 may be installed in such a way that the back plate 44 is fixed to the incineration facility using separate fastening means (not shown) such as welding or bolts or rivets to the incineration facility.

In this case, the wall plate 46 reinforces the rigidity of the frame assembly itself, while dividing the virtual space above the base plate 42 by a predetermined space unit, and setting the total weight of the fireproof material block 30 to be poured and hardened. By distributing and receiving in a space unit, the flow of the refractory block 30 is suppressed and the concentrated load on the anchor 48 (to be described later) is reduced. Accordingly, the water receptivity to the castable refractory material block 30 and the integrity between the frame assembly 40 become more solid, and thus the durability of the drop-off installation structure is further improved.

Optionally, the frame assembly 40 may have an anchor 48 for fixing the castable refractory block 30, and in the embodiment, the anchor 48 is on the bottom surface of the base plate 42. It is illustrated as provided. The anchor 48 is of English'Y' type and may be welded to the base plate 42 or integrally cast. However, in spite of the embodiment, the anchor may be added to the back plate 44 or the wall plate 46 or provided as a substitute.

In this way, the introduction of the shelf-type frame assembly 40 improves the accommodation, fixation, and support for the castable refractory block 30, thereby improving the overall durability of the fall-off installation structure, and costs related to installation, operation and maintenance. Not only can it be reduced, it can be widely applied without being largely limited by the type of waste to be incinerated and the type of incinerator. For example, in the case of industrial waste, clinker, which is a by-product of incineration, is largely generated, so a large amount of clinker generated during the incineration process is highly likely to accumulate at the fall end where the height of the step is relatively large and adhere to the front wall of the fall end. The possibility of clinker attachment is higher in the castable refractory block 30 than in a metal material such as heat resistant steel. Therefore, in the case of configuring the entire stepped portion of the fall end with the castable refractory block 30 as in the present invention, the clinker is attached and fixed in front of the fall end, thereby preventing the front and rear motion of the lower moving end 10M grate 10 row. Interference and thus the non-uniform impact applied to the fall end may increase, but despite this, the overall durability of the fall cut installation structure is enhanced through the introduction of the shelf-type frame assembly 40 and fixing means such as the anchor 48 Because it is in the state of being damaged, it can withstand such external shocks sufficiently and the possibility of damage can be significantly reduced.

On the other hand, when most of the steps of the free fall ends are made of castable refractory material via the frame assembly 40, such a fall cut installation structure is a structure that cannot be disassembled arbitrarily for maintenance purposes, and the frame assembly 40 and the Since the castable refractory block 30 has only a minimum space from the upper surface of the lower moving end (10M) and the upper surface of the grate (10), the moving end (10M) grate 10 disposed in the lower front of the dropping end is worn out, etc. Even if it is damaged and needs to be replaced, the replacement operation may not be easy. Therefore, there is a need to solve this limitation and supplement the practicality of the above-described installation structure in which the range of use is extended through cost reduction and durability improvement.

To this end, the installation structure for a fall cut according to the present invention may optionally further include a maintenance key 50. The maintenance key 50 is provided in the form of being detachably mounted under the frame assembly 40 described above. In this case, in the state where the maintenance key 50 is mounted, the lower part of the frame assembly 40 is concave upward so that the minimum space between the lower surface of the free end and the upper surface of the moving end (10M) grate 10 is not damaged. It is preferable that the shape of the depression 49 is provided and the maintenance key 50 is mounted inside the depression 49. In the state of being mounted on the depression 49, the lower surface of the maintenance key 50 is located at the same height as the lower surface of the base plate 42 of the frame assembly 40.

When maintenance of the grate 10 of the moving end 10M located below the dropping end is required, the dent 49 removes the moving end 10M grate 10 with the maintenance key 50 removed. For this purpose, it is preferable that the width in the transverse direction of the depression 49 is greater than or at least the same as the width of the unit grate in order to secure sufficient space when the grate 10 is taken out of the moving end (10M). On the contrary, when the incinerator is operated, the maintenance key 50 is mounted on the depression 49 to prevent the inflow of waste, etc. through the depression 49. For this purpose, the maintenance key 50 and the depression ( It is preferable that the cross-sectional shape of 49) is the same.

Various methods may be applied as a detachable method between the maintenance key 50 and the recessed part 49, but the maintenance key 50 is a sliding method on the recessed part 49 as in the embodiment for easy detachment and installation work. It is preferable to be detached. To this end, wing portions 502 are provided at the upper left and right sides of the maintenance key 50, and grooves 492 are also provided in the depressions 49 corresponding to the wing portions 502.

The pair of the maintenance key 50 and the depression 49 is not necessarily limited to one, and may be installed in plural if the width standard of the incinerator increases. For example, if only one pair of the maintenance key 50 and the depression 49 is provided despite the relatively large width of the incinerator, the moving end 10M grate away from the depression 49 in the width direction of the incinerator In order to replace (10), since the number of the normal moving end (10M) grate (10) that must be carried out through the depression (49) increases, the time required for the replacement operation may increase, but the maintenance key (50) When a plurality of pairs of and recesses 49 are installed in proportion to the width of the incinerator, unnecessary carrying out work for the grate 10 of the normal moving end 10M during maintenance work can be greatly reduced.

As described above, according to the installation structure for the incinerator for a stocker-type incinerator, most of the steps of the free end are covered except for the minimum separation space from the lower moving end (10M) and the upper surface of the grate (10). It is possible to significantly reduce the installation cost by configuring it with a starble refractory material. Nevertheless, by introducing the support frame assembly 40 to firmly accommodate, fix and support the castable refractory material block 30, even in a high temperature and high vibration environment. By improving the durability of the entire fall block made of the castable refractory block 30, it is possible to reduce operation and maintenance costs. In addition, it can be widely applied to general wastes, industrial wastes with a lot of clinker generation, and incinerators for the same, through improved durability against fall breaks. In addition, when most of the steps of the fall ends are made of castable refractory material that cannot be attached or detached, the problem that it is difficult to replace the damaged grate under the fall ends is to form a recess 49 in the lower part of the support frame and the corresponding recess ( 49) can be effectively eliminated by providing at least one detachable maintenance key (50).

The above description relates to a specific embodiment of the present invention. As described above, the above embodiments according to the present invention are disclosed for the purpose of explanation and are not understood to limit the scope of the present invention, and those of ordinary skill in the art will not depart from the essence of the present invention. It should be understood that various changes and modifications are possible, and all such modifications and changes may be understood to correspond to the scope of the invention disclosed in the utility model registration claims or their equivalents.

DS: drying stage
CS: combustion stage
PCS: post combustion stage
FS: Fall break
10F: Fixed end
10M: moving end
10: grate
20: heat-resistant steel grate
22: mounting round bar
30: castable refractory block
40: scraper
40: frame assembly
42: base plate
44: back plate
46: wall plate
48: anchor
49: depression
492: Home
50: Manance Key
502: wing part

Claims (7)

An installation structure for a drop end forming a boundary of each incineration end of a stocker-type incinerator, comprising: a castable refractory block; And a frame assembly fixed to an incinerator internal facility to support the castable refractory block, wherein the frame assembly and the castable refractory block accommodated therein are installed so as to cover the entire stepped portion of the falling end. Installation structure of a stocker-type incinerator with a drop cutoff.
According to claim 1, The frame assembly comprises a base plate; A back plate extending upward from a rear edge of the base plate; And a plurality of wall plates, wherein each of the plurality of wall plates is installed at a predetermined interval, and a lower end thereof is fixed to the base plate and a rear end thereof is fixed to the back plate, thereby giving the frame assembly a shelf-type structure. A stocker-type incinerator installation structure, characterized in that the fall cut off.
The installation structure of a stocker type incinerator according to claim 1, wherein the frame assembly includes an anchor for fixing the castable refractory material block.
According to any one of claims 1 to 3, It further comprises a maintenance key; wherein the maintenance key is a stocker-type incinerator, characterized in that it is removable and detachable to the recessed portion provided in the lower portion of the frame assembly. Installation structure.
[5] The structure of claim 4, wherein a plurality of pairs of the maintenance key and the recessed part are provided.
[5] The structure of claim 4, wherein the maintenance key is detachably mounted on the recessed portion in a sliding manner.
The installation structure of a stocker-type incinerator according to claim 4, wherein the width of the recessed portion in the transverse direction is equal to or greater than the width of the unit grate located directly under the lower end of the drop end.

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