JP2012197991A - Indirect water cooling and direct air cooling type fire grate combustion apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fire grate combustion apparatus which has a simple structure, prevents burn damage in a high temperature part and has excellent durability.SOLUTION: The fire grate combustion apparatus includes a plate like body and is provided with a bent part bent downward in the front end of the plate like body and a bank part extending downward in the rear end of the plate like body, and a plurality of cooling clear-water pipes for circulating cooling clear-water as a heat medium are arranged side by side via air-cooled parts, respectively between the bent part and the bank part.

Description

  The present invention relates to an indirect cooling water cooling and direct air cooling grate combustion apparatus. More specifically, indirect cooling water cooling and direct air cooling that prevent burning in the high temperature part, prevent overcooling in the low temperature part, prevent the formation of unburned material, and prevent corrosion in the gas contact part. The present invention relates to a grate combustion apparatus.

  As a solid fuel-fired boiler combustion device and an incineration combustion device for incinerating industrial waste, a grate combustion / incineration device, a fluidized bed combustion / incineration device, a rotary furnace combustion / incineration device, etc. have been conventionally employed. . Of these, the grate-type combustion / incineration equipment has a grate arranged in multiple stages in the boiler / incinerator, and has a structure in which the combustible / incineration target combustibles are incinerated while moving along the grate. Yes.

  Industrial waste processed for boiler fuel (processed fuel) contains a lot of high-molecular substances year by year, and its calorific value increases year by year. And as the calorific value of industrial waste increases, the combustion device that burns industrial waste and processed fuel, especially the grate-type combustion device, has a variety of obstacles that have not existed before (for example, burnout due to high-temperature oxidation, Burning due to dripping combustion, high temperature corrosion due to chlorine, etc.) has occurred. More specifically, the chlorine contained in the polymer-based processing fuel is singly or as compound hydrogen chloride (HCl), and the combustion device is severely burned in the high temperature part, and a large amount of unburned matter is generated due to supercooling in the low temperature part. This causes a problem of corroding the gas contact part. A grate that can prevent damage to the combustion device due to these obstacles is desired.

  In order to prevent the grate from being damaged, for example, changing the grate material to expensive heat-resistant steel has some effect but is not satisfactory. However, industrial wastes processed for boiler fuels have recently increased in calorific value as more and more polymers are included in recent years. For this reason, the combustion temperature of the fire layer also rises more and more, and relying only on modifying the material of the grate is too expensive to deal with. By that time, the combustion temperature became high. In order to solve this problem, there are a method using a high-temperature heat-resistant material that does not consider material costs and a method using a low-temperature heat-resistant material as a consumable.

  However, in the former case, the actual situation is that the high-temperature heat-resistant material is not durable enough to meet the cost of the high-grade heat-resistant material, and in the latter case, it burns out in a short period of time, and the number of operation stops increases due to the replacement. In fact, it consumes a lot of wasteful energy (electric power, auxiliary oil, water, etc.) to start and stop the system and cannot be an effective solution.

  In the case of a grate-type combustion device, the incineration object is placed on the grate, so that the life of the grate to be burnt is extended and the generation of unburned material due to incomplete combustion due to overcooling of the grate is reduced. It is necessary to cool the grate by.

  As a grate cooling method, an air cooling method and a water cooling method are usually used. The air-cooled type is a method in which combustion air is supplied at the bottom of the grate and the waste and processed fuel are burned while cooling the grate. The water-cooled type is the biggest disadvantage of the air-cooled type in order to prevent high temperature burning. Is provided with a cooling water pipe and the grate is cooled by cooling water flowing inside the cooling water pipe.

  In order to solve the above-mentioned problem, a water cooling method for cooling the grate with water is becoming an effective means, but the water cooling method currently employed is that the grate body is hollow and cooling water is contained therein. It is a structure to pass through.

  As such a water-cooled grate-type combustion apparatus (hereinafter referred to as “grate-combustion apparatus”), Patent Document 1 describes that when burning low-calorie combustion products, the cooling effect is good. A water-cooled grate having a U-shaped pipe line on the front surface is disclosed for the purpose of solving the problem that the combustion rate is reduced by cooling the burned product.

  On the other hand, in the case of the grate described in Patent Document 2, as shown in FIG. 1, when industrial waste is put into the incinerator (10), the industrial waste is in a multistage stepped form. Are sequentially passed through the grate (100) constituted by the above, incinerated in the combustion chamber (20), and discharged through the incineration ash discharge section provided on the lower side of the incinerator. The grate industrial waste transfer is pressed by a rod (3) driven by a hydraulic device (40). Further, as shown in FIG. 2, the water-cooled grate (100) of Patent Document 2 includes a cooling water pipe (120) for guiding the flow of cooling water for cooling the grate, and a cooling water pipe (120). A cooling water pipe housing part (115) for housing is formed, and a main body (110) on which an incineration object is placed and incinerated, and fixed to the cooling water pipe housing part (115), the thermal of the main body (110) A heat transfer adjusting member (130) that thermally expands or contracts depending on the state is provided.

JP 2000-240926 A Special table 2009-500590

  However, in the case of the grate combustion apparatus of Patent Document 1, when the load on the boiler / incinerator decreases and the combustion decreases, or when the thermal load on the incinerator decreases, such as immediately before the boiler / incinerator stops, Water excessively cools the grate and lowers the grate surface temperature. As a result, the combustion temperature (fired layer temperature) on the grate also decreases more than necessary, resulting in incomplete combustion, resulting in a large amount of unburned matter and poor combustion efficiency. Further, if the grate is cooled more than necessary, the generated heat of combustion is taken away by the cooling water, so that the amount of heat that can be effectively used is reduced and the thermal efficiency of the entire apparatus is lowered.

Further, as indicated by reference numeral (130) in Patent Document 2, the heat transfer coefficient for eliminating the obstacle due to the difference in thermal expansion between the cooling pipe and the grate and bringing the cooling pipe and the grate into close contact so as not to impair the heat conduction. No need for excellent metal fittings. When such a metal fitting is inserted, a slight gap (film) is formed between the grate and the metal fitting, and between the metal fitting and the cooling pipe, and this gap significantly impedes heat transfer and lowers the cooling capacity. Further, according to Patent Document 2, the heat transfer adjusting member (130) includes a metal material having a high thermal expansion coefficient or linear expansion coefficient such as copper or aluminum and having good thermal conductivity, or such a metal material. It is made of an alloy and relies on expensive materials.

  As described above, the conventional grate apparatus has a problem that the temperature of the grate varies depending on the combustion temperature, and becomes high when combustion is high and the combustion temperature is high, and becomes low when combustion is slow.

  The present invention eliminates the problems of the above-described conventional grate combustion apparatus, has a simple structure, prevents burning at a high temperature part, has excellent durability, prevents overcooling at a low temperature part, An object of the present invention is to provide a grate combustion apparatus that suppresses generation and is low in cost.

The invention according to claim 1 comprises a plate-like body,
The front edge of the plate-like body is provided with a bent portion bent downward,
A bank portion extending downward is provided at the rear edge of the plate-like body,
The present invention relates to a grate combustion apparatus characterized in that a plurality of cooling fresh water pipes for circulating cooling fresh water as a heat medium are juxtaposed between the bent part and the bank part via air cooling parts.

  According to a second aspect of the present invention, the air cooling part is defined by two intermediate bank parts, a plurality of fins are provided between the two intermediate bank parts, and the ventilation holes are provided between the plurality of fins. 2. The grate combustion apparatus according to claim 1, wherein a vent hole is provided in the air cooling section.

  The invention according to claim 3 relates to the grate combustion apparatus according to claim 1 or 2, wherein the plurality of cooling fresh water pipes are in surface contact with a partial cylindrical surface formed on the plate-like body.

The invention according to claim 4 relates to the grate combustion apparatus according to claims 1 to 3, wherein the grate is manufactured from spheroidal graphite cast iron.
According to a fifth aspect of the present invention, the grate combustion apparatus according to any one of the first to fourth aspects, wherein the grate has a thickness of 10 to 20 mm and the fin has a thickness of 8 to 15 mm. About.

Claim 6 of the present invention is a solid fuel-fired boiler combustion apparatus and an incinerator apparatus for industrial waste,
A plurality of grate combustion apparatuses disposed in a combustion chamber of the boiler combustion apparatus and the incinerator apparatus in a multistage stepped form;
An incinerator ash discharge unit that is combusted in the combustion chamber and provided below the combustion device;
A hydraulic device that reciprocates the grate combustion device,
The grate combustion device is composed of a plate-like body,
The front edge of the plate-like body is provided with a bent portion bent downward,
A bank portion extending downward is provided at the rear edge of the plate-like body,
Between the bent part and the bank part, a plurality of cooling fresh water pipes for circulating cooling fresh water as a heat medium are juxtaposed via the air cooling part,
The present invention relates to an incinerator for industrial waste, wherein the air cooling part is provided with a vent hole.
According to a seventh aspect of the present invention, the boiler combustion apparatus includes a deaerator, and the cooling fresh water pipe is connected to the deaerator. The present invention relates to an incinerator device for industrial waste.

That is, the grate cooling apparatus according to the present invention combines cooling with cooling water in the cooling pipe and air cooling of the combustion air, and the cooling water absorbs radiant heat radiated from the high-temperature grate and grate. The cooling effect is reduced when the grate temperature is low, but the combustion air in the air cooling section cools the grate by contact heat transfer. In addition, a large number of cooling plates (cooling fins) are provided in a portion through which air passes so that air cooling can be performed effectively. Air cooling has a small heat capacity ((specific heat KCal / Nm ³ ° C.) and the amount of air is limited, so the amount of heat transferred from the grate is small. The basic radiant heat transfer amount on the object surface at different temperatures is expressed by the following equation, and the heat is transferred to the fourth power difference of the temperature difference between the two object surfaces.

  According to the first, second, third, fourth, and fifth aspects of the present invention, it is possible to provide a grate combustion apparatus that has a simple structure, prevents burning at a high temperature portion, and is excellent in durability.

  Since the water cooling part of the grate cooling device according to the present invention employs an indirect cooling method by radiant heat transfer, the amount of radiant heat transfer to the cooling water is high if the temperature of the grate (fire layer temperature of the combustion product) is high. The higher the temperature, the lower the temperature of the grate, the lower the amount of heat transfer. Therefore, when the combustion temperature is low in the low combustion region, the temperature of the fire layer is not lowered too much, and an appropriate combustion temperature (fire layer temperature) can be maintained and the generation of unburned matter can be prevented.

  The grate cooling apparatus according to the present invention does not require close contact between the cooling pipe and the grate because the grate and the cooling pipe are not a heat transfer system by heat conduction, and the gap is considerably increased. Heat transfer is not impaired. As a result, a sufficient gap can be provided so as not to cause a failure due to a difference in thermal expansion between the grate and the cooling pipe.

In the grate cooling apparatus according to the present invention, the air cooling unit performs radiant heat transfer in the same manner as the contact (convection) heat transfer and the water cooling cooling unit, but the air heat capacity (specific heat KCaI / Nm ³ ° C.) Since the required amount of combustion air is limited, the cooling air becomes high temperature with a small amount of contact heat transfer, and therefore does not reach the water cooling cooling heat transfer amount in the region where the combustion temperature is high (grate temperature is high). This does not overcool the grate in a low combustion zone with a low grate temperature.

  The basic formula of the contact (convection) heat transfer amount of the air cooling section is as follows.

  In the grate cooling apparatus according to the present invention, the amount of contact heat transfer in the air cooling unit is affected by the temperature difference and the surface area of the grate, and therefore, several fins are provided to increase the surface area of the grate. .

It is explanatory drawing which shows the structure of the conventional incinerator. It is a perspective view which shows the structure of the grate combustion apparatus applied to the incinerator of FIG. It is a perspective view which shows an example of the grate combustion apparatus which concerns on one Embodiment of this invention. It is a perspective view which shows the plate-shaped body which comprises the grate combustion apparatus of FIG. It is a top view of the plate-shaped body of FIG. It is explanatory drawing which shows the simulation result which computed the cooling effect when applying the grate combustion apparatus of this invention to the combustion apparatus arrange | positioned in multiple steps in step shape. When the grate combustion apparatus of the present invention is applied to a fixed fuel-fired boiler combustion apparatus, the calculation result of boiler efficiency when cooling fresh water heat-exchanged in the cooling fresh water piping of the grate apparatus is not used as feed water for the deaerator It is explanatory drawing which shows. When the grate combustion apparatus of the present invention is applied to a fixed fuel-fired boiler combustion apparatus, the calculation result of the boiler efficiency when the cooled fresh water heat-exchanged in the cooled fresh water piping of the grate apparatus is used as the feed water for the deaerator It is explanatory drawing which shows.

The grate combustion apparatus of the present invention will be described with reference to the accompanying drawings.
FIG. 3 is a perspective view showing an example of a grate combustion apparatus according to an embodiment of the present invention. 4 is a perspective view showing a plate-like body constituting the grate combustion apparatus of FIG. FIG. 5 is a plan view of the plate-like body of FIG. FIG. 6 is an explanatory diagram showing a simulation result of calculating a cooling effect when the grate combustion apparatus of the present invention is applied to a combustion apparatus in which a plurality of staircase combustion apparatuses are arranged stepwise. FIG. 7 shows the boiler efficiency in the case where the grate combustion apparatus of the present invention is applied to a fixed fuel-fired boiler combustion apparatus and the cooled fresh water heat-exchanged in the cooled fresh water piping of the grate apparatus is not used as feed water for the deaerator It is explanatory drawing which shows the calculation result. FIG. 8 shows the boiler efficiency when cooling fresh water heat-exchanged in the cooling fresh water piping of the grate device is used as feed water for the deaerator when the grate combustion device of the present invention is applied to a fixed fuel-fired boiler combustion device. It is explanatory drawing which shows the calculation result.

  3 to 5, reference numeral 1 indicates a grate combustion apparatus according to the present embodiment. Reference numeral (S) indicates a plate-like body, which has a shape like that of the alphabet L being defeated. Reference numeral (S1) indicates the front side of the plate-like body (S). Reference numeral (S2) indicates the back side of the plate-like body (S). Reference numeral (2) indicates a bent portion of the front edge of the plate-like body (S). Reference numeral (3) indicates a bank provided at the rear edge of the plate-like body (S). Reference numeral (P) indicates a cooling fresh water pipe. Reference numerals (4a), (4b), (4c) and (4d) are intermediate banks formed between the bent part (2) and the bank part (3) on the back side (S2) of the plate-like body (S). Shows the part. Reference numeral (5) denotes between the intermediate bank portion (4a) and the intermediate bank portion (4b), between the intermediate bank portion (4c) and the intermediate bank portion (4d), between the intermediate bank portion (4e) and the bank portion ( The fin provided between 3) is shown. The reference symbol (H) is formed between the intermediate bank portion (4a) and the intermediate bank portion (4b) of the plate-like body (S) and between the intermediate bank portion (4c) and the intermediate bank portion (4d). The ventilation hole provided between fins (5) is shown. Reference numeral (L) is an arrow indicating the lower side of the grate combustion apparatus (1). Reference sign (U) is an arrow indicating the upper side of the grate combustion apparatus (1).

  3-5 again, the grate combustion apparatus (1) of this embodiment is provided with the plate-shaped body (S). A bent portion (3) bent downward is provided at the front edge of the plate-like body (S). The rear edge (3) of the plate-like body (S) is provided with soil intermediate hands (4a), (4b), (4c) and (4d) extending downward. Between the bent part (2) and the bank part (3), a plurality of cooling fresh water pipes (P) through which cooling water as a heat medium (hereinafter referred to as “cooling fresh water”) is circulated as air cooling parts. Three of them are juxtaposed in parallel with each other through a site where a functioning fin (5) is formed.

  Here, fresh water is used as the heat medium because it is possible to use seawater as a refrigerant by adopting a corrosion-resistant material as a cooling pipe, but the cost increases, so seawater is used as the refrigerant. Excluded. Moreover, when fresh water is used as the heat medium, there is an advantage that the heat recovered from the plate-like body (S) of the grate combustion apparatus (1) can be secondarily used for heating, bathing, and house cultivation. In the present embodiment, the cooling section includes the intermediate bank section (4a) and the intermediate bank section (4b), the intermediate bank section (4c) and the intermediate bank section (4d), the intermediate bank section (4e) and the bank. Between the fin (5) provided between the part (3) and the intermediate bank part (4a) and the intermediate bank part (4b) of the plate-like body (S), the intermediate bank part (4c) and the intermediate bank It is comprised (defined) from the vent hole (H) provided between the fins (5) formed between the parts (4d). In the illustrated example, between the intermediate bank part (4a) and the intermediate bank part (4b), between the intermediate bank part (4c) and the intermediate bank part (4d), between the intermediate bank part (4e) and the bank part ( The four fins (5) are provided between each of the three (3), but the number is not limited to four. In the illustrated example, fins (5) formed between the intermediate bank portion (4a) and the intermediate bank portion (4b) and between the intermediate bank portion (4c) and the intermediate bank portion (4d). Three ventilation holes (H) are provided between each other, but the number is not limited to three. When the air holes (H) are thus provided and the cool air is blown in the direction of the arrow U, not only the high temperature heating of each surface including the upper surface (S1) and the lower surface (S2) of the plate-like body (S) is suppressed. There is an advantage of promoting drying and combustion of the incinerator to be incinerated.

The optimum value of the number of fins (5) is determined from variables such as the length, thickness, and spacing between the fins (5). In the present embodiment, the plate-like body (S) and the fin (5) are integrally formed by a mold, and the material is spheroidal graphite cast iron FCD500 and 0.5% Cr. It is possible to adopt a SUS casting if the cost is neglected. However, in the present invention, since the cost is emphasized, a SUS casting that is 3.5 times more expensive than a spheroidal graphite cast iron casting is used. Excluded. Moreover, in this embodiment, the thickness of a plate-shaped object (S) is 10-20 mm, and the thickness of a fin (5) is 8-15 mm.

  In the illustrated example, the plate-like body (S) is formed between the intermediate bank portion (4a) and the intermediate bank portion (4b), and between the intermediate bank portion (4c) and the intermediate bank portion (4d). A vent hole (H) is provided between the formed fins (5), but as a modification of the present embodiment, the intermediate bank (4a) and the intermediate bank (4b) are intermediate The present invention includes a case in which the air holes (H) are not provided between the fins (5) formed between the bank portion (4c) and the intermediate bank portion (4d).

  3-5 again, the plate-like body (S) of the grate combustion apparatus (1) of this embodiment is on the back side of the plate-like body (S) on the three cooling fresh water pipes (P). (S2) between the bent part (2) and the intermediate bank part (4a), between the intermediate bank part (4b) and the intermediate bank part (4c), between the intermediate bank part (4d) and the intermediate bank part (4e). Is placed in surface contact with the partial cylindrical surface formed in the receiving part (Sa) of the cooling fresh water pipe (P) between the two. As the material of the cooling fresh water pipe (P), a material having good thermal conductivity and low cost is adopted.

  The grate combustion apparatus (1) of this embodiment is employed in an incinerator for industrial waste. In that case, for example, in the combustion chamber (20) of the conventional incinerator (10) shown in FIG. 1) Four units are arranged in place of the conventional grate combustion apparatus (100). Needless to say, in the incinerator (10), in the same manner as in the example shown in FIG. 1, the incinerated ash discharged from the incinerator (20) is incinerated in the combustion chamber (20). Part (50) and a rod (30) driven by a hydraulic device (40) that reciprocates the grate combustion device (1).

  Here, with reference to FIG. 6, the simulation result of the predicted surface temperature of the grate combustion apparatus of the present invention as an effect when the grate combustion apparatus (1) of the present embodiment is applied to an actual incinerator is shown. explain. In FIG. 6, reference numeral (M) indicates a sliding grate combustion apparatus (1) capable of reciprocating movement by a rod (30) driven by a hydraulic apparatus (40), and reference numeral (F) is fixed grate combustion. The device (1) is shown. Reference numeral (1Ga) indicates a first grate combustion apparatus group arranged in four steps, and reference numeral (1Gb) indicates a second grate combustion apparatus group arranged in four steps. Show. Reference numeral (C) indicates a transport device.

  In the simulation, it was assumed that 580 ° C. fuel was introduced into the incinerator through the rotary kiln in consideration of the actual temperature. Further, it was assumed that cold air of 15 ° C. was blown to the first grate combustion device army (1Ga), the transfer device (C), and the second grate combustion device group (1Gb). The surface temperature of the uppermost sliding grate combustion device (1) of the first grate combustion device army (1Ga) is 400 ° C., and the surface temperature of the adjacent fixed grate combustion device (1) is 430 ° C. The surface temperature of the sliding grate combustion device (1) is 440 ° C., the surface temperature of the adjacent fixed grate combustion device (1) is 430 ° C., and the temperature of the fuel immediately after dropping on the transfer device (C) is The temperature of the fuel immediately before dropping from the transfer device (C) to the second grate combustion device group (1 Gb) was 260 ° C. Furthermore, the surface temperature of the uppermost sliding grate combustion device (1) of the second grate combustion device army (1Gb) is 280 ° C., and the surface temperature of the adjacent fixed grate combustion device (1) is 250 ° C. The surface temperature of the adjacent sliding grate combustion device (1) was 230 ° C., and the surface temperature of the adjacent fixed grate combustion device (1) was 220 ° C.

In the case of an incinerator using a water-cooled grate combustor, if the incinerator is operated at a partial load, the amount of incineration will decrease, and the thermal load of the incinerator will be reduced. The temperature of S) becomes low and may be cooled to the temperature of cooling water (about 70 ° C.) flowing through the cooling fresh water pipe (P). However, in the present invention, the fins (5) formed between the intermediate bank portion (4a) and the intermediate bank portion (4b) and between the intermediate bank portion (4c) and the intermediate bank portion (4d) Three air holes (H) are provided between them, and not only relying on cooling by cooling fresh water but also cooling by air is taken in, so that low-temperature corrosion is prevented and a plate-like body (S It is possible to achieve an excellent effect that it is possible to achieve efficient cooling.
Here, referring to FIGS. 7 and 8, FIG. 8 shows that when the grate combustion apparatus of the present invention is applied to a fixed fuel-fired boiler combustion apparatus, the cooled fresh water subjected to heat exchange by the cooling fresh water piping of the grate apparatus is removed. It shows the calculation results of boiler efficiency when used as water supply for air. 7 and 8, the symbol [No. 1 stoker] indicates the first stalker group, and the symbol [No. 2 stoker] indicates a second stalker group, the symbol “Heat-up steam” is superheated steam, the symbol “Fix grate U” is the upper fixed grate, the symbol “Fix rate L” is the lower fixed grate, the symbol “ “Move rate U” is the upper movable grate, “Move rate L” is the lower movable grate, “Heat-exchange” is the heat exchange, “Transfer” is the heat conduction, and “to Boiler” is the boiler. It shows that it is. In FIG. 8, reference signs P <b> 1 and P <b> 2 indicate a water supply piping system from the cooling fresh water piping of the first and second grate groups to the deaerator. On the other hand, in FIG. 7, there is no feed water piping system from the cooling fresh water pipes of the first and second grate groups to the feed water piping system to the deaerator. Comparing described in symbol "-to Boiler" of FIG. 7 and 8, whereas a 52.8h / ^{m 3} 7 a 53.1h / ^{m 3} 8, for cooling the grate It can be seen that heat was recovered from the used fresh water. Therefore, when the grate combustion device is applied to a fixed fuel-fired boiler combustion device, the fresh water in the cooling fresh water pipe of the grate device is supplied as deaerator water after heat exchange in the furnace. Is preferred.

  According to the present invention, it is possible to provide a grate combustion apparatus that has a simple structure, prevents burning at a high temperature portion, and is excellent in durability. In addition, it is possible to prevent the combustion apparatus from being damaged due to failures such as burning due to high temperature, burning due to dropping combustion, and high temperature corrosion due to chlorine.

DESCRIPTION OF SYMBOLS 1 Grate combustion apparatus 1Ga 1st grate combustion apparatus group 1Gb 2nd grate combustion apparatus group 2 Bending part 3 Bank part 4a, 4b, 4c, 4d, 4e Middle bank part 5 Fin H Ventilation hole P Cooling fresh water piping S1 Front side S2 Back side Sa Cooling fresh water pipe receiving part

Claims (7)

It consists of a plate-like body
The front edge of the plate-like body is provided with a bent portion bent downward,
A bank portion extending downward is provided at the rear edge of the plate-like body,
A grate combustion apparatus, wherein a plurality of cooling fresh water pipes for circulating cooling fresh water as a heat medium are juxtaposed between the bent part and the bank part via an air cooling part. The air cooling part is defined by two intermediate bank parts, a plurality of fins are provided between the two intermediate bank parts, the air holes are provided between the plurality of fins, and the air cooling part is provided with air holes. The grate combustion apparatus according to claim 1, further comprising:   The grate combustion apparatus according to claim 1 or 2, wherein the plurality of cooling fresh water pipes are in surface contact with a partial cylindrical surface formed on the plate-like body.   4. The grate combustion apparatus according to claim 1, wherein the grate is manufactured from spheroidal graphite cast iron.   4. The grate combustion apparatus according to claim 1, wherein the grate has a thickness of 10 to 20 mm, and the fin has a thickness of 8 to 15 mm. A solid fuel-fired boiler combustion device and an incinerator device for industrial waste,
A plurality of grate combustion apparatuses disposed in a combustion chamber of the boiler combustion apparatus and the incinerator apparatus in a multistage stepped form;
An incinerator ash discharge unit disposed below the incinerator and incinerated in the combustion chamber;
A hydraulic device that reciprocates the grate combustion device,
The grate combustion device is composed of a plate-like body,
The front edge of the plate-like body is provided with a bent portion bent downward,
A bank portion extending downward is provided at the rear edge of the plate-like body,
Between the bent part and the bank part, a plurality of cooling fresh water pipes for circulating cooling fresh water as a heat medium are juxtaposed via the air cooling part,
An incinerator for industrial waste, wherein the air cooling part is provided with a vent hole.   The solid fuel-fired boiler combustion apparatus and the incinerator apparatus for industrial waste according to claim 6, wherein the boiler combustion apparatus includes a deaerator, and the cooled fresh water pipe is connected to the deaerator. .

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