KR200485449Y1

KR200485449Y1 - Combustion apparatus

Info

Publication number: KR200485449Y1
Application number: KR2020150005675U
Authority: KR
Inventors: 김상권
Original assignee: 주식회사 롬스
Priority date: 2015-08-25
Filing date: 2015-08-25
Publication date: 2018-01-11
Also published as: KR20170000819U

Abstract

The combustion apparatus according to the present invention includes a combustion chamber that receives combustion air from the outside and combusts the fuel contained therein, and a combustion device that recovers heat by discharging the combustion gas generated by combustion of the fuel in the combustion chamber to a boiler A gas chamber mounted on an upper end of the combustion cylinder to flow into the boiler after the combustion gas generated in the combustion chamber flows into the boiler and a water tube is disposed on the inner peripheral surface of the combustion chamber, And an air blaster connected to the air blaster outside the gas chamber and through which compressed air is caused to flow by the air blaster is provided in the gas chamber and compressed air generated by the air blaster is introduced into the gas chamber A plurality of compressed air injection nozzles for jetting into the inner water tube are provided, It characterized in that to prevent the sticking of the clinker and fly ash in the water pipe is installed in the generation and removal.

Description

COMBUSTION APPARATUS

The present invention relates to a combustion apparatus for heat recovery, and more particularly, to a combustion apparatus for heat recovery using a combustion apparatus for recovering heat from a combustion gas generated by burning a solid fuel or the like in the combustion chamber.

Generally, in an industrial facility requiring industrial hot water, steam or high-temperature gas, a combustion apparatus for generating heat energy by igniting and burning fuel in a combustion cylinder for obtaining heat energy is used, and fuel Solid fuels such as RDF, which converts municipal waste into fuel, or RPF, biomass (wood pallet, wood chip, palm by-product pallet, rice husk pallet, etc.) that fuel waste plastics are widely used in terms of economy and resource recycling.

Such a combustion apparatus generally recovers heat by supplying a high-temperature combustion gas generated by burning fuel in a combustion chamber in a combustion cylinder to a boiler through a combustion gas discharge pipe of a 'shape.

However, in such a conventional combustion apparatus, the combustion gas discharge pipe is made of a refractory wall, which has a problem that it must be replaced without being used for a long time due to cracks due to continuous contact with a high temperature combustion gas, and The ash (ash) and the fine particles contained in the combustion gas are attached to the refractory wall and are difficult to remove.

In order to solve such a problem, a combustion apparatus of the registered utility model 20-445277 filed and registered by the present applicant has been developed (see Fig. 1). As shown in FIG. 1, the combustion apparatus 1 includes a combustion chamber 10 for burning fuel therein, a combustion gas discharge port for discharging a high temperature combustion gas from the combustion chamber 10 to the boiler 50, (10) comprises a combustion chamber (11) surrounded by an inner wall (12) and burning a solid fuel supplied from a fuel supply pipe (17a) onto a grate A swirl flow supply chamber 13 formed around the combustion chamber 11 for supplying combustion air to the inside of the combustion chamber 11 and a swirling flow supply chamber 13 formed between the middle wall 14 and the outer wall 16 of the combustion chamber 10, And an air cooling chamber 15 for supplying the air to the supply chamber 13. The swirl flow supply chamber 13 is formed in a spiral shape from top to bottom so that the supplied combustion air can be swirled more easily.

The combustion gas discharging portion 30 constituting the gas chamber is discharged from the combustion chamber 11 and discharged from the combustion chamber 11. The combustion gas discharging portion 30 is mounted on the combustion chamber 10 and has a hollow shape, The lower portion of the combustion gas discharge portion 30 communicates with the upper portion of the combustion cylinder 10 and the other side of the combustion gas discharge portion 30 communicates with the boiler 50 And a water pipe 34 interconnected in a zigzag form is installed inside the side wall 32 and the upper wall 33 of the body of the combustion gas discharge part 30. [ An outlet pipe 35 is provided between the water pipe 34 and the boiler 50 so that water circulating in the water pipe 34 flows into the boiler.

Since the combustion gas discharge portion 30 of the combustion apparatus 1 has such a configuration, the temperature can be lowered by the water pipe 34 inside the body even when the combustion gas is continuously in contact with the high temperature combustion gas, It is advantageous that the heat recovery rate can be improved by introducing the preheated water into the boiler 50 while being circulated by the heat exchanger 34. Further, the body of the combustion gas discharging unit 30 is made of a steel material, so that the adhesion of ashes or fine particles in the combustion gas can be lowered compared with a conventional combustion apparatus comprising a refractory wall.

1, the durability is improved as compared with the combustion gas discharge pipe made of the refractory wall of the prior art. However, during long-term use, the fly ash generated from the combustion of the solid fuel is discharged from the combustion gas discharge portion 30 The water pipe 34 and the body are attached to each other and clinker is generated.

The present invention has been made in order to solve the above problems of the prior art, and it is an object of the present invention to prevent the generation of clinker by adhering fly ash to a water pipe and a body of a combustion gas discharge portion for discharging a high- And to provide a combustion device capable of removing the combustion gas.

Also, a plurality of air blasters installed in the gas chamber are spaced apart from each other along the circumferential direction of the gas chamber.

Further, the air blaster installed in the gas chamber is periodically operated at a predetermined time interval.

Also, the injection pipe is formed of a U-shaped injection tube, and the plurality of compressed air injection nozzles are formed along the water pipe on two arms formed in parallel in the U-shaped injection tube.

According to the present invention, fly ash is adhered to the water pipe and the body of the combustion gas discharge part for discharging the high-temperature combustion gas from the combustion pipe to the boiler from the combustion device, thereby preventing and eliminating the clinker from being generated, thereby improving the durability, There is provided a combustion apparatus in which the recovery rate is improved.

1 is a view showing a conventional combustion device,
2 is a view showing a combustion apparatus according to the present invention,
Figure 3 is a cross-sectional view of the gas chamber in Figure 2;

Hereinafter, a combustion apparatus according to a preferred embodiment of the present invention will be described in detail with reference to the drawings.

FIG. 2 is a view showing a combustion apparatus according to the present invention, and FIG. 3 is a sectional view of a gas chamber in FIG.

The combustion apparatus of the present invention includes a combustion cylinder 100 having a combustion chamber 110 for burning a solid fuel therein, a fuel supply pipe 210 for supplying solid fuel into the combustion chamber 110, And a gas chamber 300 for discharging hot combustion gas to the boiler.

The combustion cylinder 100 has a cylindrical shape and accommodates and burns the solid fuel therein. The combustion cylinder 100 includes a combustion chamber 110 surrounded by an inner wall 120 to burn fuel, A cooling chamber 130 for cooling the inner wall 120 and a side combustion air supply chamber 150 formed on the side of the combustion chamber 110 for supplying combustion air from the outside to the combustion chamber 110.

The cooling chamber 130 serves to lower the temperature of the inner wall 120 continuously contacting the high temperature combustion gas. The cooling chamber 130 includes a middle wall 140 spaced apart from the inner wall 120, And a cooling water outlet and a cooling water inlet (not shown) are formed on the upper and lower sides of the middle wall 140 to allow the cooling water to flow in and out. The cooling water inlet is formed in the tangential direction of the cylindrical middle wall 140. A cooling water guide plate 131 formed in a spiral shape is provided inside the middle wall 140 of the cooling chamber 130 so that the cooling water introduced through the cooling water inlet moves up and down along the cooling water guide plate 131, And then flows out through a cooling water outlet formed on the upper side of the cooling pipe 140. The cooling water flowing out through the cooling water outlet flows into the boiler for use in recovering heat from the high temperature combustion gas generated in the combustion chamber 110 through a connection pipe (not shown).

The side combustion air supply chamber 150 is formed in a space between the outer wall 160 and the middle wall 140 formed apart from the middle wall 140 and is formed in the upper side of the outer wall 160 to supply air A supply port is formed, and a lower portion is opened. The air supply port is formed in a tangential direction of the cylindrical outer wall 160 so that the supplied combustion air is circulated downward into the side combustion air supply chamber 150 and then circulated into the combustion chamber 110 through the opened lower portion.

In addition, a rotating grate 170 is provided below the combustion chamber 110 to be rotatable. The rotary grate 170 is a disk-shaped burner for burning the solid fuel supplied to the upper surface thereof, and is rotated at a rotation speed of 1 rev / 1 minute to 1 rev / 3 minute. A fuel supply pipe 210 for supplying solid fuel is formed at the center of the rotary grate 170.

The fuel supply pipe 210 is vertically installed at the center of the lower portion of the combustion cylinder 100 and a transfer screw 220 for supplying the solid fuel into the combustion chamber 110 is installed therein.

The outer circumference of the fuel supply pipe 210 is formed to be larger in diameter than the fuel supply pipe 210 and formed concentrically with the lower combustion air supply pipe (not shown) for supplying the combustion air into the combustion chamber 110 from the lower portion of the combustion chamber 110 230 are formed.

At the upper end of the fuel supply pipe 210, a cone-shaped supply cone 211 is formed to protrude into the combustion chamber 110. The supply cone 211 is formed with a plurality of air supply nozzles 213 in the circumferential direction in which the combustion air supplied from the lower combustion air supply pipe 230 flows in order to supply the solid fuel supplied from the fuel supply pipe 210 to the supply cone 211 by the combustion air supplied through the air supply nozzle 213. The inclined guide portion 212 is further formed at an edge of the supply cone 211 so as to be bent downward along the circumferential direction and inclined downward and coupled to the rotary grate 170 to guide the solid fuel to the upper surface of the grate 170 Some combusted solid fuel is moved to the rotating grate 170 along the inclined guide portion 212 on the upper surface of the supply cone 211. In addition, since the inclined guide portion 212 is formed in combination with the rotary grate 170, the rotary grate 170 and the supply cone 211 rotate together.

The ash discharge passage 190 is formed at the lower edge of the combustion cylinder 100 to discharge the ash of the solid fuel burned in the circumferential direction of the rotary grate 170, And a drain pipe for discharging it to the outside is installed. A cooling air supply pipe 191 for supplying cooling air for cooling the re-discharge passageway 190 is formed on one side of the outer wall of the re-discharge passage 190 in the tangential direction of the outer wall of the re-discharge passage 190. Therefore, the cooling air supplied by the cooling air supply pipe 191 cools the re-discharge passage 190 heated by the material discharged while rotating the re-discharge passage 190.

The solid fuel (SRF) such as RDF that converts municipal waste into fuel through fuel supply pipe 210 or RPF that converts waste plastic into fuel, biomass (wood pallet, wood chip, palm by-product pallet, Is supplied to the supply cone 211 and the combustion air is directly supplied to the bottom surface of the solid fuel through the air supply nozzle 213 formed in the supply cone 211 of the fuel supply pipe 210.

The gas chamber 300 is mounted on the upper portion of the combustion cylinder 100 and has a hollow shape so that the high temperature combustion gas generated by the combustion of the solid fuel in the combustion chamber 110 flows into the gas chamber 300 . The lower part of the gas chamber 300 communicates with the upper part of the combustion cylinder 100 and the other side communicates with the boiler. A zigzag water pipe 320 is disposed inside the gas chamber 300. The water circulated in the water pipe 320 flows into the boiler. The wall 310 of the gas chamber 300 is made of a steel material.

By having such a configuration, the gas chamber 300 can lower the temperature by the water tube 320 even when it continuously contacts with the high temperature combustion gas discharged from the combustion cylinder, thereby improving the durability. By the water tube 320 It is advantageous to increase the heat recovery rate by introducing the first preheated water into the boiler while being circulated. In addition, since the body of the gas chamber 300 is made of a steel material, the binding property of ash or fine particles in the combustion gas can be greatly reduced due to the heterogeneity of the material as compared with the conventional device made of the conventional refractory wall.

In addition, in the gas chamber 300 according to the present invention, a clinker may be generated in the water pipe 320 due to fly ash that flows into the gas chamber 300 when the gas canister is removed for a long period of time. A plurality of air blasters 330 are installed on the outer side of the wall 310 of the air blaster 330 and a U-shaped spray tube 340 is installed as an air header for spraying compressed air from the air blaster 330 to the water pipe 320, A plurality of compressed air injection nozzles 350 are formed along the water pipe 320 at two parallel arms of the U-shaped spray pipe 340. 2 and 3, three air blasters 330 are arranged at an interval of 120 degrees along the circumferential direction of the gas chamber 300 on the outer side of the cylindrical gas chamber 300 in this embodiment. Accordingly, in the present invention, a plurality of compressed air injection nozzles (hereinafter referred to as " compressed air injection nozzles ") are installed along the two parallel arms of the U- 350 to the water pipe 320 to instantaneously form a shock wave inside the gas chamber 300 to prevent sticking of the fly ash to the water pipe 320 inside the gas chamber 300 and to prevent clinker from being generated And removed.

Hereinafter, a method of operating a combustion apparatus having a clinker removing apparatus according to a preferred embodiment of the present invention will be described.

First, the solid fuel supplied from the fuel hopper (not shown) is supplied into the combustion chamber 110 by the transfer screw 220 installed in the fuel supply pipe 210, and the solid fuel supplied into the combustion chamber 110 is supplied to the preheating burner It is preheated and ignited and burned by an ignition burner (not shown). The solid fuel supplied to the upper side of the rotating grate 170 is moved to the edge of the rotating grate 170 over time due to the continuous supply of the fuel while being burned. At the edge of the rotating grate 170, Is discharged through the cultivation outlet (190) while the rotatable grate (170) rotates.

Meanwhile, the solid fuel is combusted in the combustion chamber 110, and the cooling water is introduced through the cooling water inlet of the cooling chamber 130 formed on the outer circumference of the inner wall 120, and the introduced cooling water is rotated by the cooling water guide plate 131 Cooling the inner wall 120, and then flowing out through the cooling water outlet. Then, the cooling water exiting from the cooling chamber 130 flows into the boiler, and heat is recovered from the high-temperature combustion gas by heat exchange.

The combustion air necessary for the solid fuel to be burned is supplied from the outside to the combustion chamber 110 through the side combustion air supply chamber 150 and the lower combustion air supply pipe 230. In the side combustion air supply chamber 150, The combustion air supplied through the air supply port 161 formed in the tangential direction on the upper portion of the outer wall 160 is circulated downward in the side combustion air supply chamber 150 and then supplied into the combustion chamber 110 through the opened lower portion . Accordingly, since the combustion air is supplied while being rotated at the combustion chamber 110 side in the side combustion air supply chamber 150, combustion air is supplied to most of the fuel even if the combustion chamber 110 is smaller than when the combustion air is linearly supplied to the fuel Thereby making it possible to improve the thermal efficiency while lowering the manufacturing cost.

The combustion air supplied by the lower combustion air supply pipe 230 formed on the outer side of the fuel supply pipe 210 is supplied to the fuel supply pipe 210 through the lower combustion air supply pipe 230, The combustion air is supplied to the lower portion of the solid fuel that is supplied through the air supply nozzle 213 formed in the supply cone 211 and is buried in the combustion chamber 110 so that not only the outside of the loaded solid fuel but also the solid fuel In addition, it is burned smoothly and the thermal efficiency is improved.

Meanwhile, the high-temperature combustion gas generated by the combustion of the solid fuel in the combustion chamber 110 flows into the gas chamber 300 through the open top of the combustion chamber 110. At this time, the gas chamber 300 has a water pipe 320 installed therein to reduce the temperature of the wall body 310, thereby improving the durability. The preheated water circulated by the water pipe 320 flows into the boiler 50, The recovery rate can be improved.

As described above, when the combustion apparatus is operated for a long time, fly ash flowing into the gas chamber 300 is fixed to the water pipe 320 to generate clinker. In this embodiment, Air blower 330 through the plurality of compressed air injection nozzles 350 formed along the water pipe 320 via the U-shaped injection pipe 340 at regular intervals once every 6 hours The compressed air injected instantaneously forms a shock wave inside the gas chamber 300, thereby preventing fly ash from adhering to the water pipe 320 inside the gas chamber 300 and preventing clinker from being generated.

While the present invention has been described with reference to the preferred embodiments thereof, it will be apparent to those skilled in the art that various modifications and variations can be made therein without departing from the scope of the present invention as defined in the following claims. It will be easily understood.

100: Combustion tube 110: Combustion chamber
120: inner wall 130: cooling chamber
140: middle wall 160: outer wall
170: Rotating grate 210: Fuel supply pipe
230: Lower combustion air supply pipe 300: Gas chamber
320: Water pipe 330: Air blaster
340: Dispenser 350: Compressed air injection nozzle

Claims

1. A combustion apparatus for recovering heat by discharging combustion gas generated by burning a solid fuel in a combustion cylinder to a boiler, the combustion apparatus comprising a combustion cylinder for receiving combustion air from the outside and burning a solid fuel contained therein,
A gas chamber of a steel material mounted on an upper end of the combustion chamber and flowing into a boiler after a combustion gas generated in the combustion chamber flows into the boiler and a water tube is disposed on an inner circumferential surface of the combustion chamber, An air blaster for spraying air, and a spray pipe connected to the air blaster outside the gas chamber and through which the compressed air is caused to flow by the air blaster, wherein the compressed air from the air blaster is introduced into the spray pipe through the gas A plurality of compressed air injection nozzles for spraying into a water tube inside the chamber are provided,
A plurality of air blasters installed in the gas chamber are spaced apart from each other along the circumferential direction of the gas chamber,
The injection pipe is made up of a U-shaped spray tube, and the plurality of compressed air injection nozzles are formed along the water pipe on two arms formed in parallel in the U-shaped spray tube, Preventing the formation of clogging and clinker, lowering the temperature of the gas chamber of the steel material by the water tube of the gas chamber to improve the durability of the gas chamber, and preheated water circulated by the water tube of the gas chamber to the boiler And the heat recovery rate is improved,
Characterized in that the air blaster installed in the gas chamber periodically pulses compressed air at predetermined time intervals and instantaneously forms shock waves in the gas chamber to prevent and prevent clogging of the fly ash and the formation of clinker in the water tube .

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