KR101204756B1 - Solid fuel combusting boiler apparatus by pyrolysis and gasification - Google Patents

Abstract

PURPOSE: An integrated combustion boiler system for pyrolyzing and gasifying solid fuel products is provided to increase the efficiency of heat energy by immediately collecting the heat energy radiated from a combustion chamber and an exhaust port since a heat recovery unit is installed above the combustion chamber and in the exhaust port. CONSTITUTION: An integrated combustion boiler system for pyrolyzing and gasifying solid fuel products comprises a combustion unit(100), a fuel feeding unit(200), and a heat recovery unit(300). The combustion unit comprises a combustion chamber(110) and a rotary grate(120). The rotary grate is installed on the bottom of the combustion chamber and rotates in place. A vertical screw conveyor(210) of the fuel feeding unit penetrates the bottom of the combustion chamber and the rotary grate in order and is installed up to the peak of the rotary grate. The fuel feeding unit feeds solid fuel to the exterior of the rotary grate through the bottom of the combustion chamber. The heat recovery unit absorbs heat above the combustion chamber and inside an exhaust port with pipe bodies(310).

Description

SOLID FUEL COMBUSTING BOILER APPARATUS BY PYROLYSIS AND GASIFICATION

The present invention relates to a pyrolysis and gasification-integrated combustion boiler device for a solid fuel product, and in particular, the heat recovery means for integrally installing the heat recovery means to perform a boiler function in the upper part and the exhaust port of the combustion chamber to increase the utilization of thermal energy, the solid fuel is rotated The present invention relates to a pyrolysis and gasification-integrated combustion boiler device for a solid fuel product, which is made of a detachable and assembleable form to facilitate manufacture, repair, and replacement.

Korean Patent Publication No. 10-0808140 discloses a technique for burning high calorific value solid fuel in order to utilize high calorific value solid fuel of circulating resources as useful energy. have. The prior art achieves complete combustion by combustion of solid fuel through pyrolysis and gasification.

In this prior art, a boiler device is connected to recover heat energy that is radiated. The boiler device is provided separately from the combustion equipment and is connected to the end of the exhaust port of the combustion chamber to recover heat energy radiated through the exhaust port of the combustion chamber to produce hot water or generate steam.

However, since the boiler device is provided separately from the combustion equipment and is installed with the exhaust port of the combustion chamber interposed, a considerable amount of heat is lost through the combustion chamber and the exhaust port during the movement of the combustion chamber to the boiler device, and the heat recovery capacity of the boiler device is extremely low. There is a problem falling.

In addition, it is difficult to manufacture because the rotating grate that burns the solid fuel is made of a single cylinder as a casting, and there is a problem of large economic losses because the rotating grate has to be replaced with a cylinder even when some parts are damaged or damaged. .

Korean Patent Publication No. 10-0808140 "Multifunctional combustion facility for burning solid fuel of circulating resources"

An object of the present invention is to increase the utilization rate of the heat energy radiated from the combustion chamber and the exhaust port, and to form and disassemble the rotary grate that is the combustion of the solid fuel can be easily manufactured, repaired, replaced, unburned exhaust The present invention provides a pyrolysis and gasification integrated combustion boiler device for solid fuel products that can reburn gas and neutralize pollutants.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory and are not intended to limit the invention to the particular embodiments that are described. It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory and are not restrictive of the invention, There will be.

The present invention for achieving the above object comprises a combustion chamber, a rotating shape having a conical shape having a step-shaped outer periphery is installed on the bottom of the combustion chamber to rotate in place, and combusting solid fuel; A vertical screw conveyor which penetrates the bottom of the combustion chamber, passes through the inside of the rotating grate, and reaches the apex of the rotating grate, and supplies the solid fuel to the outer periphery of the rotating grate through the bottom of the combustion chamber. Supply means; And a plurality of tubes arranged inside the upper wall of the combustion chamber and inside the wall of the exhaust port extending from the upper wall of the combustion chamber to form a fluid flow path, thereby absorbing and recovering heat from the upper portion of the combustion chamber and the exhaust port. It includes a heat recovery means.

Specifically, the rotating great of the combustion means is composed of a plurality of separable segments, the segments may have a form in which the rotating great is divided into a plurality in the circumferential direction.

The tubes of the heat recovery means are arranged at a distance from each other in the vertical direction in the interior of the upper wall of the combustion chamber and the interior of the wall of the exhaust port, and at the lower and upper ends of the tubes, horizontally inside the wall of the upper wall of the combustion chamber and the exhaust port. A water supply pipe and a water collecting pipe installed in a direction are respectively connected, and the water supply pipe branches the fluid flowing from the outside into each of the pipe bodies, and the water collecting pipe collects the fluid flowing from each of the pipe bodies and discharges the fluid to the outside. have.

A water supply drum connected to the water supply pipe may be further installed below the exhaust port.

A steam supply drum may be further installed at an upper portion of the exhaust port to supply one or both of steam and hot water to be connected to the collecting pipe.

Inside the exhaust port, a plurality of guide walls may be installed to guide the exhaust gas to flow in a zigzag form.

The water supply pipe, the pipe body and the water collecting pipe may be installed in the guide wall.

An exhaust pipe may be connected to a rear end of the exhaust port, and a water supply preheating means may be further installed in the middle of the exhaust pipe to recover heat in the exhaust pipe and preheat the fluid flowing into the water supply pipe.

The water supply preheating means includes a tubular body connected to the middle of the exhaust pipe, a plurality of vertical tubes arranged at intervals from each other in a vertical direction in the wall of the tubular body, and the tubular body inside the wall of the tubular body with the vertical tubes interposed therebetween. It is composed of a pair of horizontal pipes are installed in the horizontal direction and connected to the upper and lower ends of the vertical pipes, one of the horizontal pipes is connected to the water supply pipe and the other is inflow of fluid from the outside of the vertical pipes Can be supplied to each.

According to the present invention, it is possible to increase the utilization rate of the heat energy by integrally installing the heat recovery means for performing the boiler function in the upper part and the exhaust port of the combustion chamber to immediately recover the heat energy radiated from the combustion chamber and the exhaust port.

In addition, it is convenient to manufacture, repair, and replace because the rotating grate, which is the combustion of the solid fuel, is made of a detachable and assembled form. This can yield significant economic benefits.

In addition, since the solid fuel is introduced into the rotating grate through the bottom (bottom) of the combustion chamber, the solid fuel is injected from the upper part of the combustion chamber and falls, so that it does not land on the rotating grate and blows into the air to form a crank or a part of the exhaust chamber. By flying to the rear stage and blocking the passage of the exhaust gas treatment apparatus installed at the rear end of the exhaust port, the problem of deteriorating the function of the combustion chamber or losing the value of the solid fuel can be solved.
In addition, the unburned exhaust gas is re-burned and the pollutants are neutralized and exhausted, thereby greatly reducing environmental pollution.

1 is a view showing a pyrolysis and gasification integrated combustion boiler device of a solid fuel product of the present invention.
2 is a view of the pyrolysis and gasification integrated combustion boiler device of the solid fuel product of the present invention from top to bottom.
3 is an enlarged view illustrating a portion A of FIG. 1.
4 is a view showing one segment constituting a rotating great in the present invention.
5 is an enlarged view illustrating a portion B of FIG. 1.
6 is an enlarged view illustrating a portion C of FIG. 1.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. Like elements in the figures are denoted by the same reference numerals wherever possible. In the following description, well-known functions or constructions are not described in detail since they would obscure the invention in unnecessary detail.

As shown in the figure, the pyrolysis and gasification integrated combustion boiler device of the solid fuel product of the present invention includes a combustion means (100). Combustion means 100 is a structure that burns the solid fuel, and includes a combustion chamber 110 and the rotary great 120.

Combustion chamber 110 is made of a cylindrical shape, the rotary great 120 is installed on the inner bottom of the combustion chamber 110 to burn the solid fuel. The blower tube 130 is installed to penetrate the bottom of the combustion chamber 110, and the rotary great 120 is coupled to the blower tube 130 to rotate in place along the blower tube 130.

The blower tube 130 supplies the air flowing from the outside to the rotary grate 120, and the rotary grate 120 injects air to the solid fuel combusted through a plurality of nozzle holes (not shown). The blower tube 130 is connected to the motor 131 through a chain or the like to obtain rotational force.

Rotating Great 120 is a conical shape having a step-like outer circumference to produce a large amount of flammable pyrolysis gas due to the solid-liquid-gasification process occurs while the solid fuel melts from the upper step to the lower step. The rotating great 120 is made of a removable and assembled form is easy to manufacture, repair, replacement.

As shown in FIG. 4, the rotating great 120 may be composed of a plurality of separable segments 121, and the segments 121 may be formed by dividing the rotating great 120 into a plurality of segments along the circumferential direction. Can be.

Segments 121 form a plurality of bolt holes 121a in the left and right sidewalls, so that the bolts are fastened to the bolt holes 121a so as to be firmly fixed to each other to form a rotating grate 120. If removed, they are separated from each other to facilitate the manufacture, repair, and replacement of the rotating great 120.

By rotating the rotary grate 120 injects the air supplied from the blower tube 130, a swirling flame is naturally formed in the combustion chamber 110. The swirling flame is soared to the upper portion of the combustion chamber 110 by the air injected by the air injection nozzle 140 to form a tornado swirling flame.

The air injection nozzle 140 is arranged at regular intervals along the height of the combustion chamber 110 to make a tornado swirling flame from the swirling flame formed by the rotating great 120 by injecting the air inclined in one direction.

Although not shown, a decatalytic oxidation combustion means equipped with an ammonia inlet and a cooling air inlet for reburning unburned exhaust gas and neutralizing contaminants may be installed at an upper portion of the combustion chamber 110. The upper part of the combustion chamber 110 performs the function of the secondary combustion chamber by the decatalytic oxidation combustion means.

The decatalytic oxidation combustion means simultaneously injects ammonia and cooling air to cool down and decompose nitrogen oxides (NOX) generated at high temperature at the same time as rising residence, and sulfur oxides (SOX) formed from inorganic materials are cold air. And by adsorbing the film on the surface of the decatalytic oxidation combustion means by the hot heat temperature difference generated in the combustion chamber 110, the adsorbed inorganic material forms an oxide shear layer having a temperature difference according to thickness and time, and is removed by dropping to its own weight. . The high temperature exhaust gas, which is reburned and purified by the decatalytic oxidation combustion means, is discharged through the exhaust port 150 protruding from the upper wall of the combustion chamber 110.

The pyrolysis and gasification integrated combustion boiler device of the solid fuel product of the present invention includes a fuel supply means (200). The fuel supply means 200 penetrates the solid fuel through the lower portion (bottom) of the combustion chamber 110 and enters the rotary grate 120, so that the solid fuel is injected from the upper portion of the combustion chamber 110 and falls down. It does not land on the air and blows into the air to form a crank on the inner wall of the combustion chamber 110 or partly to the rear end of the exhaust port 150 to block the passage of the exhaust gas treatment device installed at the rear end of the exhaust port 150 to function as the combustion chamber 110. It solves the problem of lowering or losing the value of solid fuel.

The fuel supply means 200 includes a vertical screw conveyor 210 installed through the bottom of the combustion chamber 110 and passing through the inside of the rotary grate 120 to the peak of the rotary grate 120 to thereby burn the solid fuel in the combustion chamber ( Penetrating through the bottom of the 110 may be added to the rotating great 120.

The vertical screw conveyor 210 may penetrate the inside of the blower tube 130 to penetrate the bottom of the combustion chamber 110, and the front end of the vertical screw conveyor 210 may be installed to expose the tip of the rotary grate 120. Penetrating through the bottom of the) may be supplied to the outer periphery of the rotary great 120. The vertical screw conveyor 210 rotates under the power of the motor 211.

A horizontal screw conveyor 220 may be connected to the middle of the vertical screw conveyor 210. The horizontal screw conveyor 220 receives the solid fuel from the fuel supply hopper 230 and transfers it to the vertical screw conveyor 210 and rotates under the power of the motor 221.

The vertical screw conveyor 210 transfers the solid fuel conveyed from the horizontal screw conveyor 220 vertically toward the combustion chamber 110 and passes through the bottom of the combustion chamber 110 to supply to the outer periphery of the rotating great 120.

Pyrolysis and gasification integrated combustion boiler device of the solid fuel product of the present invention includes a heat recovery means (300). The heat recovery means 300 includes a plurality of tubular bodies 310 arranged inside the upper wall of the combustion chamber 110 and inside the wall of the exhaust port 150 to form a flow path of a fluid such as water, so that the combustion chamber 110 And immediately recover the heat energy radiated from the exhaust port 150 to increase the utilization rate of the heat energy.

The tubular bodies 310 are densely arranged vertically in the upper wall of the combustion chamber 110 and in the wall of the exhaust port 150 such that fluid flowing through the tubular bodies 310 is discharged from the combustion chamber 110 and the exhaust port 150. It effectively absorbs and radiates heat energy that radiates heat.

The tubes 310 arranged on the upper wall of the combustion chamber 110 immediately absorb the high temperature heat energy generated by the secondary combustion of the unburned exhaust gas in the upper portion of the combustion chamber 110, thereby greatly increasing the thermal energy recovery rate.

The tubular bodies 310 may be holes formed by vertically penetrating the interior of the upper wall of the combustion chamber 110 and the interior of the wall of the exhaust port 150. Shapes of the upper portion and the exhaust port 150 of the combustion chamber 110 may be formed in a square or a circle.

The existing secondary combustion chamber has a separate secondary combustion chamber formed of refractory materials. Conventionally, in order to maintain the statutory exit temperature of the secondary combustion chamber at 800 ° C, a separate combustion chamber is configured separately, and a second burner is operated by installing a separate device to increase the temperature by oil or gas.

Such a facility was a method of operating in an existing incinerator, but the present invention is to immediately reduce the temperature of the combustion gas generated at a high temperature of more than 1,200 ℃ in the process of burning solid fuel of high calorific value through the cooling process to drop the temperature higher than the proper The combustion chamber is configured so as not to use separate elevated fuels by configuring the device to increase the thermal energy efficiency by allowing the water cooling wall tubes 310 to be absorbed by the heat cooling device.

The water supply pipe 320 and the collecting pipe 330 are installed in the horizontal direction in the upper wall of the combustion chamber 110 and the wall of the exhaust port 150. The water supply pipe 320 and the water collecting pipe 330 are connected to the lower and upper ends of the pipe bodies 310, respectively. The water supply pipe 320 is installed across the lower ends of the tubes 310 to branch the fluid flowing from the outside into each of the tubes 310, and the collecting pipe 330 is installed across the upper ends of the tubes 310. Thus, the steam and hot fluid flowing from each of the tubes 310 are collected and discharged to the outside. The water supply pipe 320 and the water collection pipe 330 may be holes formed through the inside of the upper wall of the combustion chamber 110 and the inside of the wall of the exhaust port 150 in a horizontal direction.

A water supply drum 340 connected to the water supply pipe 320 may be installed below the exhaust port 150. The water supply drum 340 stores the fluid pumped from the outside and stably supplies the water supply pipe 320. A steam supply drum 350 connected to the collecting pipe 330 may be installed at an upper portion of the exhaust port 150. The steam supply drum 350 stores steam introduced from the water collecting pipe 330 and hot water at a high temperature to stably supply any or all of steam and hot water to a place of use.

Inside the exhaust port 150, a plurality of guide walls 151 for inducing exhaust gas in a zigzag form may be installed to delay an exhaust gas passing time for the exhaust port 150, and the guide wall 151 may be used. The water supply pipe 320, pipes 310 and the collection pipe 330 is also installed in the interior of the heat energy can be recovered more effectively. The guide walls 151 may be installed in a circular and square or multivariate angle.

An exhaust pipe 170 may be connected to the rear end of the exhaust port 150 to transfer the exhaust gas to the rear facility, and a water supply preheating means 400 may be installed in the middle of the exhaust pipe 170 to further recover heat in the exhaust pipe. . The water supply preheating means 400 preheats the fluid flowing into the water supply drum 340 to increase the recovery rate of the thermal energy and shorten the time for the fluid to turn into steam and hot water.

The water supply preheating means 400 is connected to the middle of the exhaust pipe 170 and arranged to be spaced apart from each other in the vertical direction in the interior of the wall of the cylinder 410 and the structure that the exhaust gas can flow without being blocked. A plurality of vertical pipes 420 and a pair of horizontal horizontally installed in the wall of the cylinder 410 with the vertical pipes 420 interposed therebetween and connected to the top and bottom of the vertical pipes 420, respectively. It consists of tubes 430 and 440. One of the horizontal tubes 430 and 440 is connected to the water supply drum 340, and the other one of the horizontal tubes 430 and 440 supplies the fluid from the outside to each of the vertical tubes 420.

The fluid from the outside supplied to the horizontal tube 430 is heated by absorbing the heat energy of the exhaust gas passing through the cylinder 410 while passing through the vertical tubes 420, the heated fluid in the horizontal tube 440 The water is collected and moved to the water supply drum 340. The preheated fluid of the water supply drum 340 absorbs the heat energy from the upper part of the combustion chamber 110 and the exhaust port 150 while moving the respective tubes 310 through the water supply pipe 320, and turns into steam and high temperature hot water. The fluid changed to steam and high temperature is collected in the collection pipe 330 and moved to the steam supply drum 350 and then moved to each use place.

The present invention has been described with reference to the preferred embodiments, and those skilled in the art to which the present invention pertains to the detailed description of the present invention and other forms of embodiments within the essential technical scope of the present invention. Could be. Here, the essential technical scope of the present invention is shown in the claims, and all differences within the equivalent range will be construed as being included in the present invention.

100: combustion means 110: combustion chamber
120: rotating great 121: segment
121a: bolt hole 130: blower
131: motor 140: air spray nozzle
150: exhaust port 151: guide wall
170: exhaust pipe 200: fuel supply means
210: vertical screw conveyor 211: motor
220: horizontal screw conveyor 221: motor
230: fuel supply hopper 300: heat recovery means
310: tube 320: water pipe
330: collecting pipe 340: water drum
350: steam supply drum 400: water supply preheating means
410: cylinder 420: vertical tube
430,440 horizontal pipe

Claims (9)

Combustion means having a conical shape having a combustion chamber, and a stepped outer periphery is installed on the bottom of the combustion chamber to rotate in place, the combustion means for burning solid fuel;
A vertical screw conveyor which penetrates the bottom of the combustion chamber, passes through the inside of the rotating grate, and reaches the apex of the rotating grate, and supplies the solid fuel to the outer periphery of the rotating grate through the bottom of the combustion chamber. Supply means; And
A plurality of pipes are arranged inside the upper wall of the combustion chamber and inside the wall of the exhaust port extending from the upper wall of the combustion chamber to form a fluid flow path, thereby absorbing and recovering heat from the upper portion of the combustion chamber and the exhaust port. Including heat recovery means,
The rotating grate of the combustion means is composed of a plurality of separable segments, the segments are divided into a plurality of the rotating grate along the circumferential direction,
The deoxidation combustion means equipped with an ammonia inlet and a cooling air inlet is installed in the upper part of the combustion chamber.
Tubes of the heat recovery means are arranged at intervals in the vertical direction in the interior of the upper wall of the combustion chamber and the interior of the wall of the exhaust port, horizontally in the upper wall of the combustion chamber and the wall of the exhaust port at the lower and upper ends of the tubes. A water supply pipe installed in a direction and a water collecting pipe are connected to each other, and the water supply pipe branches the fluid flowing from the outside into each of the pipes, and the water collecting pipe collects the fluid flowing from each of the pipes, and discharges it to the outside.
Inside the exhaust port is provided a plurality of guide walls for guiding the exhaust gas in a zigzag form, the water supply pipe, the pipe and the water collecting pipe is installed in the inside of the guide wall,
An exhaust pipe is connected to a rear end of the exhaust port, and a water supply preheating means is installed in the middle of the exhaust pipe to recover heat in the exhaust pipe and preheat the fluid flowing into the water supply pipe.
The water supply preheating means includes a tubular body connected to the middle of the exhaust pipe, a plurality of vertical tubes arranged at intervals from each other in a vertical direction in the wall of the tubular body, and the tubular body inside the wall of the tubular body with the vertical tubes interposed therebetween. It is composed of a pair of horizontal pipes are installed in the horizontal direction and connected to the upper and lower ends of the vertical pipes, one of the horizontal pipes is connected to the water supply pipe and the other is inflow of fluid from the outside of the vertical pipes A pyrolysis and gasification integral combustion boiler device for a solid fuel product, characterized in that the supply to each.
delete delete The method of claim 1,
Pyrolysis and gasification integrated combustion boiler device of a solid fuel product is further installed in the lower part of the exhaust port is connected to the water supply pipe.
The method of claim 1,
A pyrolysis and gasification integral combustion boiler apparatus for a solid fuel product further connected to the water collecting pipe and configured to supply a steam supply drum for supplying any or all of steam and hot water.
delete delete delete delete

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