KR101850120B1 - Waste burning apparatus and waste treating system using thereof - Google Patents

Abstract

According to the present invention, provided is a waste combustion apparatus comprising: a combustion chamber which receives dried sludge or waste supplied from an outlet gate or a waste supply means of a sludge drying device through an injection means, and combusts the dried sludge or waste in a combustion furnace through a burner for generating high-temperature heat; a reaction chamber which is communicated with an upper side of the combustion chamber, and provides a reaction space for reducing a harmful substance among combustion gases combusted in the combustion chamber through an adsorption or reduction reaction; a slaked lime spraying means which is formed in an upper part of the reaction chamber, sprays slaked lime in an inner space of the reaction chamber, and removes a chlorine material from the combustion gases; an SNCR spraying means which is formed in an upper part of the reaction chamber, sprays urea water into the inner space of the reaction chamber, and removes a nitrification material from the combustion gases; a spiral air supply means which is formed in the middle part of the reaction chamber, injects air into the inner space of the reaction chamber in a spiral shape, and rotates the combustion gases moving along the reaction chamber in a spiral shape; and a drain which is formed in the combustion chamber and discharges ash generated during combustion to the outside.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a waste combustion apparatus and a waste treatment system using the same,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a waste combustion apparatus and a waste disposal system using the same, and more particularly, to a waste incineration system for waste incineration And the waste gas can be spirally rotated so that the residence time of the combustion gas is prolonged, thereby improving the removal efficiency of harmful substances using the lime and urea water, and a waste treatment system using the same.

Generally, wastes such as tires, vinyl and plastic used in daily life, food wastes, sewage sludge and animal manure are only partially recycled and mostly buried or incinerated. Among them, the method of landfilling the wastes causes a problem that the landfill is secured and the groundwater and the land are contaminated by the wastes buried, and a method of disposing the wastes by incineration has been intensively disclosed.

Accordingly, the above-mentioned waste must be burned in a high-temperature combustion furnace, and a combustion apparatus for burning waste is disclosed in, for example, Japanese Patent Application Laid-Open No. 10-0060257.

Conventional waste combustion apparatuses include an incinerator for burning waste such as food wastes and the like which have been dewatered and dried in advance and one or more injection nozzles provided on the upper part of an incinerator and the like, So that harmful substances such as nitric oxide in the combustion gas are removed by the adsorption or reduction reaction.

However, since the conventional incineration furnace has a structure such as a cylinder, the incineration furnace has a high thermal energy in the case of the combustion gas generated in the combustion of the waste, so that the combustion space of the incinerator rises vertically, .

Therefore, even if the reducing material is injected from the upper part of the incinerator, the reaction time with the reducing material is very short, and when the direction of the flame is changed, it is not uniformly distributed over the whole area of the incinerator, The reaction area is not wide and the efficiency is greatly reduced.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a method and an apparatus for removing harmful substances from a lump of lime or urea by improving the residence time of a combustion gas by rotating a combustion gas spirally in a reaction chamber located in an upper portion of the combustion chamber And a waste disposal system using the same.

Meanwhile, the object of the present invention is not limited to the above-mentioned objects, and other objects not mentioned can be clearly understood by those skilled in the art from the following description.

To this end, according to the present invention, a sludge or waste supplied from an outlet gate of a sludge drying device or a waste supply means through a burner generating high-temperature heat is supplied through a charging means and burned in a combustion furnace; A reaction chamber communicating with the upper side of the combustion chamber and providing a reaction space for reducing harmful substances in the combustion gas burned in the combustion chamber through an adsorption or reduction reaction; A slaked lime injecting means disposed at an upper side of the reaction chamber for injecting slaked lime into the inner space of the reaction chamber to remove chlorine material from the combustion gas; An SNCR injection means configured at an upper portion of the reaction chamber for injecting urea water into the inner space of the reaction chamber to remove nitric oxide from the combustion gas; And a spiral air supply means disposed at an intermediate portion of the reaction chamber for injecting air spirally into the inner space of the reaction chamber so that the combustion gas moving along the reaction chamber rotates in a spiral manner; And a drain disposed in the combustion chamber and discharging the ash generated in the combustion to the outside.

Further, according to the present invention, there is provided a sludge drying apparatus comprising: A waste combustion apparatus as described above; And a selective catalytic reaction device for coagulating the harmful substances in the combustion gas by catalytically reacting the combustion gas generated during the combustion of the waste combustion device with hot air of the high temperature of the waste combustion device, / RTI >

Here, the sludge drying apparatus includes: a drying chamber for providing a space in which sludge is moved and dried; An outer steam chamber configured to surround the outside of the drying chamber and allowing the hot air to move to the outer surface of the drying chamber to indirectly dry the sludge; A central steam shaft rotatably installed in the center of the drying chamber so that the sludge is moved inside the drying chamber and hot air is moved in the center of the drying chamber to dry the sludge indirectly; A sludge supply means connected to one end of the drying chamber to supply a predetermined amount of sludge to the drying chamber; An outlet gate corresponding to a lower portion of the discharge silo formed at the other end of the drying chamber and discharging the dried sludge by indirect hot wind; An exhaust port corresponding to an upper portion of the discharge silo and discharging the combustion gas generated when the sludge is dried; And a hot air collecting pipe communicating with the outer steam chamber and the end portion of the central steam shaft to collect the hot air dried by the sludge.

The selective catalytic reaction apparatus may further include a cylindrical reaction tower for providing a space for catalytic reaction of the combustion gas while moving; A catalytic means configured in the reaction tower to allow catalytic reaction of the combustion gas so that the harmful substance is denitrified; A heat exchange steam layer configured to surround the outside of the reaction tower and to receive hot air at a high temperature from the waste combustion device to transfer hot air to the outer surface of the reaction tower to heat exchange the combustion gas to a predetermined temperature; A combustion gas injection means formed at the upper end of the reaction column for injecting a combustion gas into the reaction space in a spiral manner; An exhaust means formed at the lower end of the reaction tower for supplying a combustion gas, which is denitrified with harmful substances, to the cleaning and dust collecting apparatus by a catalytic reaction with the catalytic means; And a discharging means disposed at the lower end of the reaction tower for discharging the denitrifying substances, which have been denitrified by the catalytic reaction with the catalytic means, to the outside.

Therefore, according to the present invention, it is possible to remove not only the nitric oxide substances in the combustion gas but also the chlorine substances, and the adsorption or reduction reaction time is extended through the longest movement time of the combustion gas in the reaction chamber, So that the efficiency of removing harmful substances in the combustion gas can be improved.

On the other hand, the effects of the present invention are not limited to the effects mentioned above, and other effects not mentioned can be clearly understood by those skilled in the art from the description of the claims.

1 is a side view of an internal structure of a waste combustion apparatus according to a preferred embodiment of the present invention;
FIG. 2 is a plan view of the internal structure of the waste combustion apparatus of FIG. 1; FIG.
3 is a view illustrating a configuration of a waste treatment system using a waste combustion apparatus according to a preferred embodiment of the present invention; And
4 and 5 are views showing the construction of a sludge drying apparatus and a selective catalytic reaction apparatus in the waste treatment system of FIG. 3, respectively.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a side view of the internal structure of a waste combustion apparatus according to a preferred embodiment of the present invention, and FIG. 2 is a plan view of the internal structure of the waste combustion apparatus of FIG. FIG. 3 is a view showing the construction of a waste treatment system using a waste combustion apparatus according to a preferred embodiment of the present invention, and FIGS. 4 and 5 are graphs showing a sludge drying device and a selective catalytic reaction Fig.

1 to 5, a waste combustion apparatus 200 according to a preferred embodiment of the present invention includes a sludge drying apparatus 100, a sludge drying apparatus 100, The sludge drying apparatus 100 includes a burner 210 for generating heat at a high temperature and an outlet gate 170 for supplying the sludge to the sludge drying apparatus 100, A combustion chamber 230 for supplying the dried sludge or waste supplied from the means PS through the charging means 220 and for burning in the combustion furnace; A reaction chamber 240 for providing a reaction space in which harmful substances in the gas are reduced through an adsorption or reduction reaction, and a reaction chamber 240 formed at the upper side of the reaction chamber 240 for spraying calcium hydroxide into the inner space of the reaction chamber 240, A slurry injecting means 250 for removing chlorine in the gas, an SNCR injecting means 250 for injecting urea water into the inner space of the reaction chamber 240 at an upper portion of the reaction chamber 240 to remove nitric oxide in the combustion gas, The air is injected spirally into the inner space of the reaction chamber 240 at the middle portion of the reaction chamber 240 and the reaction chamber 240 to allow the combustion gas moving along the reaction chamber 240 to rotate in a spiral manner, 240 so that the residence time is increased and the contact area with the lime or urea water is increased evenly distributed over the entire surface of the reaction chamber 240 to improve the removal efficiency of the harmful substances through the adsorption or reduction reaction And a drain 280 formed in the combustion chamber 230 and discharging the ash generated during combustion to the outside.

The burner 210 is a means for generating high-temperature heat in the combustion furnace of the combustion chamber 230, and a known flame generating means can be used, and a detailed description thereof will be omitted.

The injecting means 220 is a means for injecting sludge or wastes into the combustion furnace of the combustion chamber 230. The injecting means 220 receives the dried sludge from the outlet gate 170 of the sludge drying apparatus 100, PS, and the like, such as an input conveyor or a metering feeder, for supplying the combustible waste to the inlet of the combustion chamber 230, and thus a detailed description thereof will be omitted.

The combustion chamber 230 provides a combustion space of a predetermined area as a means for causing sludge or waste to be disposed of while being burned by high-temperature heat in the combustion furnace.

The reaction chamber 240 is communicated on the upper side of the combustion chamber 230 and serves as a reaction space for reducing harmful substances in the combustion gas burned in the combustion chamber 230 through an adsorption or reduction reaction. Thereby providing a reaction space having a predetermined area having a cylindrical shape.

The slaked lime injecting means 250 is provided at an upper portion of the reaction chamber 240 and injects slaked lime into the inner space of the reaction chamber 240 to remove chlorine in the combustion gas through an adsorption or reduction reaction. An injection nozzle 251 installed at the upper side of the chamber 240 for injecting the slaked lime to the upper side of the reaction chamber 240 and a slaked lime storage silo 252 for storing the slaked lime and supplying the slaked lime to the injection nozzle 251. [ And the like.

Therefore, according to the slaked lime injecting means 250, the slaked lime is injected from the upper side to the lower side of the reaction chamber 240, and the combustion gas generated vertically rising in the combustion chamber 230 is subjected to the adsorption and reduction reaction The chlorine material in the combustion gas can be removed.

The SNCR injection means 260 is disposed at an upper portion of the reaction chamber 240 and injects urea water into the inner space of the reaction chamber 240 to remove nitric oxide from the combustion gas through an adsorption or reduction reaction. An injection nozzle 261 provided at an upper portion of the reaction chamber 240 for injecting urea water to the upper side of the reaction chamber 240 and an urea water storage 262 for storing urea water and supplying urea water to the injection nozzle 261. [ Tank 262 and the like.

In this connection, the connection pipe connecting the injection nozzle 261 and the urea water storage tank 262 is provided with a steam supply means (STEAM) provided with high temperature steam from a steam drum in which high temperature hot air is concentrated, It is preferable that the nitrogen oxide is injected into the inner space of the reaction chamber 240 in a heat exchanged state at about 800 ° C to 1000 ° C so that the adsorption or reduction reaction of the nitric oxide in the combustion gas and the urea water is further promoted.

Therefore, according to the SNCR injection means 260, the urea water is injected from the upper side to the lower side of the reaction chamber 240, and the combustion gas generated vertically rising in the combustion chamber 230 is adsorbed and reduced As the reaction proceeds, it is possible to remove the nitric oxide from the combustion gas.

The helical air supply means 270 is formed in the middle portion of the reaction chamber 240 and injects air spirally into the inner space of the reaction chamber 240 so that the combustion gas moving along the reaction chamber 240 is spirally rotated So that the residence time at the time of the movement in the reaction chamber 240 is made long and at the same time the contact area with the lime or urea water is increased evenly distributed over the whole area of the reaction chamber 240, As a means for improving the removal efficiency, there is provided a pipe-structured installation ring 271 which is installed in the middle part of the reaction chamber 240 so as to surround the outer circumferential surface of the reaction chamber 240, and an outer peripheral surface of the installation ring 271 An injection tube 272 for injecting air from an external air supply means (not shown) into the inside of the installation collar 271, and a reaction chamber 240 communicating with the inner circumferential surface of the installation collar 271 at a constant interval, Through to the inside of And a plurality of air injection pipes 273 for allowing the air to be injected into the reaction chamber 240 to delay the combustion gas without vertically rising.

The plurality of air injection pipes 273 may be configured to selectively adjust the air injection angle with respect to the installation collar 271 so that the combustion gas is supplied to the reaction chamber 271 in accordance with the flame direction of the combustion chamber 230 The time for the combustion gas to move inside the reaction chamber 240 is delayed so that the contact time with the slaked lime or urea water is made long and the combustion gas is supplied to the reaction chamber 240 So that the contact area with the slaked lime and urea water is increased to improve the removal efficiency of the harmful substances.

The spiral air supply means 270 injects air spirally into the inner space of the reaction chamber 240 so that the combustion gas moving along the reaction chamber 240 rotates in a spiral manner so that the residence time of the combustion gas And is distributed evenly over the entire surface of the reaction chamber 240, so that the removal efficiency of harmful substances using the lime slag or the urea water can be improved.

The drain 280 is formed at the lower end of the combustion chamber 230 and serves as a means for discharging the ash generated during combustion to the outside, so that a detailed description will be omitted.

Hereinafter, the operation of the waste combustion apparatus 200 according to the preferred embodiment of the present invention will be described in detail.

The combustion chamber 230 is heated by the burner 210 at a temperature of 1200 ° C. to 1400 ° C. through the inlet means 220 to the outlet gate 170 of the sludge drying apparatus 100 or the waste supply means PS), and the combustion proceeds.

The combustion gas generated as the combustion progresses in the combustion chamber 230 vertically rises into the reaction chamber 240 and the slurry injection means 250 and the SNCR injection means 260, respectively, so that chlorine and nitrate in the combustion gas are removed by adsorption or reduction reaction while contacting the combustion gas. At this time, the spiral air supply means The combustion gas vertically raised from the combustion chamber 230 to the reaction chamber 240 is spirally rotated by the rotation unit 270 to move toward the upper side of the reaction chamber 240.

Therefore, according to the waste combustion apparatus 200 of the present invention, it is possible to remove not only nitrification substances in the combustion gas but also chlorine substances, and at this time, the combustion gas is allowed to travel through the reaction chamber 240 for as long as possible, Or the reduction reaction time is made longer and the adsorption or reduction reaction area is increased, so that the efficiency of removing harmful substances in the combustion gas can be improved.

1 to 5, the waste disposal system using the waste disposal apparatus according to the preferred embodiment of the present invention mainly includes a sludge drying apparatus 100 for drying sludge, a sludge drying apparatus 100, A waste combustion device 200 that receives dry sludge from a waste supply unit PS and supplies various waste from the waste supply unit PS to the sludge drying device 100, A selective catalytic reaction unit 300 for catalytically reacting the combustion gas generated during combustion of the waste combustion apparatus 200 with heat at a high temperature of the waste combustion apparatus 200 to coagulate the nitrifying substance in the combustion gas, ) And the like.

The sludge drying apparatus 100 includes a cylindrical drying chamber 110 for providing a space for drying the sludge while being moved, a drying chamber 110 surrounding the drying chamber 110, An outer steam chamber 120 for supplying hot air to the outer surface of the drying chamber 110 so that the hot air is moved to indirectly dry the sludge, A refractory and heat insulating chamber 130 for preventing deterioration of the external steam chamber 120 in which the hot air is moved so that the sludge is rotatably installed in the center of the drying chamber 110 and moved through the screw 141 in the drying chamber 110; A central steam shaft 140 for supplying hot air at a high temperature from the waste combustion apparatus 200 to allow hot air to move inside the center of the drying chamber 110 to indirectly dry the sludge, A sludge supply unit 150 for supplying sludge in a predetermined amount to the drying chamber 110, a sludge drying unit 160 for discharging the sludge dried by the indirect hot air, which corresponds to a lower portion of the discharge silo 160 formed at the other end of the drying chamber 110, An exhaust gate 170 for supplying the waste gas to the waste combustion apparatus 200, a combustion gas such as an odor generated during drying of the sludge corresponding to the upper portion of the discharge silo 160, And the hot steam generated by drying the sludge is collected by the condensate tank of the boiler BO, which is connected to the outer steam chamber 120 and the end portion of the central steam shaft 140, A water pipe 190 and the like.

The sludge drying apparatus 100 has a structure in which the drying chamber 110, the outer steam chamber 120, the fireproof thermal insulation chamber 130 and the central steam shaft 140 have a quadruple cylindrical structure, The operation of moving the sludge through the screw 141 rotated during rotation of the central steam axis 140 is smoothly performed through the jack-up means that the position of the supply means 150 is higher than the position of the outlet gate 170 .

The drying chamber 110 provides a space for drying the sludge while the sludge is moved. The drying chamber 110 has a cylindrical shape, and the inner hollow provides a function of a moving space in which the sludge is indirectly dried by hot air.

The outer steam chamber 120 is configured to surround the outside of the drying chamber 110 with a predetermined gap therebetween to allow the hot air to move to the edge of the drying chamber 110 to dry the sludge indirectly, And has the shape of a cylinder having a diameter larger than that of the drying chamber 110 and provides a function of a hot air flow path for moving high temperature hot air to the outer surface of the drying chamber 110.

Therefore, the external steam chamber 120 does not allow the hot air to be directly supplied to the hollow of the drying chamber 110 to dry the sludge, but also to supply the hot air to the outside of the drying chamber 110, The sludge inside the sludge can be indirectly dried, and even if the sludge is dried, the sludge agglomerates in a predetermined size, the sludge can not be dried quickly but can be evenly dried to the inside. And combustion can be prevented.

The fire-proof and heat-insulating chamber 130 surrounds the outer steam chamber 120 with a predetermined gap therebetween to form an air layer so as to prevent deterioration of the outer steam chamber 120, The outer steam chamber 120 has a cylindrical shape having a diameter larger than that of the outer steam chamber 120 and the surface of the outer steam chamber 120 is heat exchanged by an air layer at a room temperature having a relatively low temperature to constitute a separate refractory member So that the refractory function can be provided.

The central steam shaft 140 is rotatably installed in the center of the drying chamber 110 so that the sludge is moved inside the drying chamber 110 through the screw 141 and hot air is moved to the center of the drying chamber 110 A rotary shaft having a cylindrical shape having a diameter which is 1/5 to 1/3 smaller than the diameter of the drying chamber 110 is rotatably installed in an inner center portion of the drying chamber 110 And provides a function of a hot air flow path for allowing movement of the sludge and moving hot air at a central portion of the drying chamber 110.

The central steam shaft 140 has a hollow portion 143 in which a screw 141 is spirally arranged on the outer circumferential surface of the rotary shaft 142 and hot air is moved on the inner circumferential surface of the rotary shaft 142.

Accordingly, the sludge supplied to one end of the drying chamber 110 can be moved to the other end by the central steam axis 140. At this time, by the high temperature hot air moving in the hollow of the central steam axis 140, The sludge inside the sludge dryer 110 can be indirectly dried. Even if the sludge is dried and solidified into a predetermined size, the sludge can be dried evenly to the inside of the sludge, So that it is not adsorbed and combustion can be prevented.

That is, according to the present invention, since the central steam shaft 140, the drying chamber 110, and the outer steam chamber 120 have a triple cylindrical structure, hot air is directly supplied to the drying chamber 110, The sludge can be indirectly heated and dried by the hot air which is respectively transferred to the hot air flow path formed at the central portion of the drying chamber 110 and the hot air flow path surrounding the outside of the drying chamber 110, , It is possible to prevent the combustion of the sludge and to suppress the generation of odor.

The sludge supplying means 150 is connected to one end of the drying chamber 110 to supply a predetermined amount of sludge to the drying chamber 110. The sludge conveyed from the sludge feeding hopper is conveyed by a dosing injector To be constantly supplied along the sludge supply pipe of the drying chamber 110.

The outlet gate 170 corresponds to the lower portion of the discharge silo 160 formed at the other end of the drying chamber 110 and is an outlet means for discharging the dried sludge by the indirect hot air, And disposed at the lower side of the discharge silo 160 constituted in a cylindrical shape so that the dried sludge is discharged into the dry sludge moving conveyor and supplied to the waste combustion apparatus 200.

The exhaust port 180 corresponds to an upper portion of the discharge silo 160 and is an exhaust means for discharging a combustion gas such as an odor or the like generated during drying of the sludge and has a cylindrical shape at the other end of the drying chamber 110 So that the gas is supplied to the combustion chamber 230 of the waste combustion apparatus 200.

The hot air collecting pipe 190 is a hot air collecting means that communicates with the outer steam chamber 120 and the end portion of the central steam shaft 140 to collect and reuse hot air dried by the sludge, Is supplied to the steam turbine after passing through a condensate tank of a boiler (BO) functioning with the incineration heat supplied from the waste combustion apparatus (200), and is recycled for power generation.

Hereinafter, the operation of the sludge drying apparatus 100 according to the preferred embodiment of the present invention will be described in detail.

First, the sludge is supplied in a predetermined amount to one end of the drying chamber 110 by the sludge supply means 150.

The hot steam from the waste combustion apparatus 200 is supplied to the outer steam chamber 120 surrounding the drying chamber 110 and the central steam shaft 140 rotatably installed in the center of the drying chamber 110.

The sludge supplied to the drying chamber 110 by the screw 141 moves to the other end of the drying chamber 110 as the central steam axis 140 rotates. At this time, Temperature hot air is supplied to the central steam shaft 140 and the outer steam chamber 120 surrounding the outside of the drying chamber 110 so that the high temperature heat is transferred to the inner space of the drying chamber 110, And then dried.

Thereafter, the dried sludge which has been moved to the other end of the drying chamber 110 in a dried state is discharged to the waste gas combustion apparatus 200 through the outlet gate 170, and the combustion gas such as odor generated during drying of the sludge The hot air in the heat exchanged state when the sludge is dried is collected by the hot air collector pipe 190 and discharged from the waste incinerator 200 to the combustion chamber 230 of the waste incinerator 200. [ It is supplied to the steam turbine after passing through the condensate tank of the boiler (BO) functioning with the incineration heat, and is recycled for power generation.

Therefore, the sludge drying apparatus 100 according to the present invention does not directly heat and dry the sludge while hot air is directly supplied to the drying chamber 110, but the hot air flow path formed in the center of the drying chamber 110 and the drying chamber The sludge can be indirectly heated and dried by the hot air which is respectively moved to the hot air flow path enclosing the outside of the sludge 110, thereby preventing the burning of the sludge and suppressing the generation of odor.

The waste combustion apparatus 200 is a device for supplying various sorts of waste from the sludge drying apparatus 100 or the waste supply means PS and burning the sludge and supplying the hot air generated by the combustion to the sludge drying apparatus 100 The sludge or waste supplied from the outlet gate 170 of the sludge drying apparatus 100 or the waste supply means PS is supplied through the input means 220 through the burner 210 which generates high- A reaction chamber 230 communicating with the upper side of the combustion chamber 230 for providing a reaction space for reducing harmful substances in the combustion gas burned in the combustion chamber 230 through an adsorption or reduction reaction, (240), an upper portion of the reaction chamber (240) to inject chlorite into the inner space of the reaction chamber (240) to remove chlorine substances in the combustion gas, On the side The SNCR injector 260 injects urea water into the inner space of the reaction chamber 240 to remove the nitric oxide in the combustion gas and the inner space of the reaction chamber 240, So that the combustion gas moving along the reaction chamber 240 rotates in a spiral manner so that the residence time of the gas in the reaction chamber 240 is increased, and at the same time, A spiral air supply means 270 for improving the removal efficiency of harmful substances through adsorption or reduction reaction so as to increase the contact area with the lime or urea water and the combustion chamber 230, And a drain 280 for discharging the gas to the atmosphere.

Here, since the waste combustion apparatus 200 has the above-described structure, a detailed description thereof will be omitted.

The waste disposal system of the present invention includes a boiler BO disposed at the rear end of the waste incinerator 200 to enable heating using high temperature hot air, A dust collecting device (GEN) provided at the rear end of the boiler (BO) for collecting fine dust in the combustion gas and spraying liquid slaked lime to treat the sulfated and chlorinated materials in the combustion gas A filtration device (FTAS) of a bag filter type which is formed between the rear end of the dust collecting device (INAS) and the selective catalytic reaction device (300) And a cleaning and dust collecting device (SNAS) disposed at the rear end of the catalytic reaction device 300 for discharging only colorless / odorless vapor or gas from which toxic substances in the combustion gas have been completely removed.

The boiler BO is installed at the rear end of the waste combustion apparatus 200 and is capable of heating using hot air of a high temperature. The boiler BO includes an evaporator, a superheater, a steam drum, a deaerator, a condensate tank, , Various pumps, and the like.

The steam turbine generator GEN is a device for generating electricity by receiving hot air from the boiler BO and may have a known configuration such as a plurality of steam turbines, a thermostat, an intermediate-pressure steam distributor, a steam condenser, .

The dust collecting device INAS is disposed at the rear end of the boiler BO and collects fine dust in the combustion gas to treat harmful substances. The dust collecting device INAS includes a dust collecting cyclone for collecting fine dust by centrifuging the combustion gas, A slaked lime injector constituted at the rear end of the cyclone for spraying the slaked lime of the liquid phase, SDR for treating the sulfated and chlorinated materials in the combustion gas, and the like.

The filtration unit FTAS is constructed between the rear end of the dust collecting unit INAS and the selective catalytic reaction unit 300 to suck up the finely pulverized lime powder from the lower part of the filtration unit while passing it through the upper part thereof. A compressor for supplying compressed air, a temperature regulator for regulating the temperature inside the filtration space, and the like.

The cleaning and dust collecting apparatus SNAS is an apparatus which is disposed at the rear end of the selective catalytic reaction apparatus 300 to exhaust only colorless / odorless vapor or gas from which harmful substances in the combustion gas have been completely removed, A fan, a damper, a sensor, a liquid ejection device, and the like.

The selective catalytic reaction apparatus 300 is an apparatus for performing a catalytic reaction with a combustion gas generated during combustion of the waste combustion apparatus 200 while exchanging heat with high temperature hot air of the waste combustion apparatus 200 to coagulate the nitrification substances in the combustion gas A reactor 310 in the form of a cylinder to provide a space for catalytic reaction of the combustion gas while moving, a catalytic unit 320 in the reaction tower 310 for allowing the combustion gas to catalyze and denit the harmful material ), And the outside of the reaction tower 310. The hot air is supplied from the waste combustion apparatus 200 to the outer surface of the reaction tower 310 so that the combustion gas is heat-exchanged to a predetermined temperature A heat-exchange steam layer (330) is formed by surrounding the outside of the heat-exchange steam layer (330) and an air layer is formed to prevent deterioration of the heat-exchange steam layer (330) A layer 340 and an upper end of the reaction tower 310 so that the combustion gas is injected spirally into the inner space of the reaction tower 310 so that the residence time at the time of movement in the reaction tower 310 becomes longer, A combustion gas injection means 350 for uniformly distributing the gas on the entire surface of the tower 310 to increase the contact area with the catalyst means 320 to improve the removal efficiency of the toxic substances through the catalytic reaction, An exhaust means 360 configured to supply the exhaust gas denitrified by the catalytic reaction with the catalytic means 320 to the cleaning and dust collecting apparatus SNAS and the lower end of the reaction tower 310, And a discharging means 370 for discharging the denitrifying substances, which have been denitrified by the catalytic reaction with the catalyst means 320, to the outside.

Here, in the selective catalytic reaction apparatus 300, the reaction tower 310, the heat exchange steam layer 330, and the refractory insulation layer 340 have a triple cylindrical structure.

The reaction tower 310 is a cylindrical shape means for providing a space for catalytic reaction of the combustion gas while moving, and can have a known SCR reaction tower structure, and thus a detailed description thereof will be omitted.

The catalyst means 320 is configured inside the reaction tower 310 and is a means for allowing the combustion gas to catalyze the reaction so that the harmful substances are denitrified. The catalyst means 320 has a laminated structure of a plurality of catalyst layers, such as titanium dioxide or vanadium pentoxide And may be constituted by a known catalyst layer, detailed description thereof will be omitted.

Here, the reaction tower 310 may further have a well-known structure in which a reducing agent such as ammonia or urea is injected at the upper end thereof.

The heat exchange steam layer 330 is configured to surround the outside of the reaction tower 310 and receives hot air at a high temperature from the waste combustion apparatus 200 to transfer hot air to the outer surface of the reaction tower 310, As a means for allowing heat to be exchanged at a predetermined temperature, the internal temperature of the reaction tower 310 has a temperature of about 270 ° C to 500 ° C due to high-temperature hot air having a cylindrical shape having a larger diameter than the reaction tower 310 So that an optimal denitrification reaction can be generated.

Here, the heat exchange steam layer 330 has a structure in which high-temperature hot air generated from the waste combustion apparatus 200 is supplied from the steam drum of the boiler BO and heat-exchanged steam (or hot air) .

Therefore, according to the heat exchange steam layer 330, the combustion gas is heated separately by using a burner or the like so as to have an optimum denitrification reaction temperature (in this configuration, the combustion gas is moved into the reaction tower 310, The heat of the combustion gas can be exchanged through the hot air generated from the waste combustion apparatus 200 by wrapping the outside of the reaction tower 310 so that energy can be saved by recycling waste heat , And the space in which the denitrification reaction is performed can always have the optimum denitrification reaction temperature.

The fireproof insulation layer 340 is a means for preventing the cooling and deterioration of the heat exchange steam layer 330 which is formed by surrounding the heat exchange steam layer 330 and in which an air layer is formed to move the hot air, And the surface of the heat exchange steam layer 330 is heat-exchanged by an air layer at a room temperature having a relatively low temperature so that the refractory function can be provided without forming a separate refractory member .

The combustion gas injecting means 350 is disposed at the upper end of the reaction tower 310 so that the combustion gas is injected spirally into the space inside the reaction tower 310 so that the residence time at the time of movement in the reaction tower 310 becomes longer And is disposed at the entire surface of the reaction tower 310 to increase the contact area with the catalyst unit 320 to improve the removal efficiency of the toxic substances through the catalytic reaction. An injection ring 351 having a pipe structure which is installed to surround the inner circumferential surface of the reaction tower 310 and an injection ring 351 connected to the outer circumferential surface of the injection ring 351 and connected to the waste combustion device 200 or the filtration device 351 in the injection ring 351, A supply pipe 352 for supplying the combustion gas from the FTAS and an inner circumferential surface of the injection ring 351 are communicated with each other at a predetermined interval to inject the combustion gas into the reaction tower 310, Even without delay And a plurality of combustion gas injection tubes 353 for locking the combustion gas.

The plurality of combustion gas injection tubes 353 may be configured to selectively adjust the injection angle with respect to the injection ring 351 so that the combustion gas is spirally rotated within the reaction tower 310 The time for the combustion gas to move inside the reaction tower 310 is delayed so that the contact time with the reducing agent or the catalyst layer is lengthened and the combustion gas spreads evenly over the entire surface of the reaction tower 310, The contact area with water can be increased to improve the removal efficiency of harmful substances.

Therefore, the combustion gas injecting means 350 injects the combustion gas spirally into the inner space of the reaction tower 310, so that the combustion gas traveling along the reaction tower 310 is rotated in a spiral manner, so that the residence time of the combustion gas And at the same time, it is evenly distributed over the entire surface of the reaction tower 310, so that the efficiency of removing toxic substances can be improved.

The exhaust means 360 is means provided at the lower end of the reaction tower 310 to supply the combustion gas, which is denitrated with harmful substances by the catalytic reaction with the catalyst means 320, to the cleaning and collecting device SNAS, And the detailed description thereof will be omitted.

The exhausting means 370 is a known means configured to be disposed at the lower end of the reaction tower 310 to exhaust the denitrified substances denitrified by the catalytic reaction with the catalytic means 320 to the outside, It will be omitted.

Hereinafter, the operation of the selective catalytic reaction apparatus 300 according to the preferred embodiment of the present invention will be described in detail.

First, the combustion gas generated by the waste combustion apparatus 200 is vertically injected into the reaction tower 310, and the combustion gas contacts the catalyst means 320 formed in the reaction tower 310, Denitrification is removed by the catalytic reaction.

At this time, the combustion gas injected into the reaction tower 310 is spirally rotated by the combustion gas injection means 350 formed at the upper end of the reaction tower 310 to move toward the lower side of the reaction tower 310, , And the space where the denitrification reaction of the reaction tower 310 is performed by the heat exchange steam layer 330 always has the optimum denitrification reaction temperature.

Therefore, according to the selective catalytic reaction apparatus 300 of the present invention, harmful substances such as nitric oxide in the combustion gas are denitrified and removed in the reaction tower 310 having the optimal denitrification reaction temperature, ), The catalytic reaction time and area are increased, so that the efficiency of removing toxic substances in the combustion gas can be improved.

Hereinafter, a waste treatment method of a waste treatment system using a waste combustion apparatus according to a preferred embodiment of the present invention will be described.

First, the sludge is supplied in a predetermined amount to one end of the drying chamber 110 by the sludge supply means 150.

The external steam chamber 120 surrounding the outside of the drying chamber 110 and the central steam shaft 140 rotatably installed in the center of the drying chamber 110 are respectively supplied with hot air from the waste combustion apparatus 200 .

The sludge supplied to the drying chamber 110 by the screw 141 moves to the other end of the drying chamber 110 as the central steam axis 140 rotates. At this time, Temperature hot air is supplied to the central steam shaft 140 and the outer steam chamber 120 surrounding the outside of the drying chamber 110 so that the high temperature heat is transferred to the inner space of the drying chamber 110, And then dried.

Thereafter, the dried sludge which has been moved to the other end of the drying chamber 110 in a dried state is discharged to the waste gas combustion apparatus 200 through the outlet gate 170, and the combustion gas such as odor generated during drying of the sludge The hot air in the heat exchanged state when the sludge is dried is collected by the hot air collector pipe 190 and discharged from the waste incinerator 200 to the combustion chamber 230 of the waste incinerator 200. [ It is supplied to the steam turbine after passing through the condensate tank of the boiler (BO) functioning with the incineration heat, and is recycled for power generation.

On the other hand, when the combustion chamber 230 is heated by the burner 210 at a temperature of 1200 ° C. to 1400 ° C., the outlet gate 170 of the sludge drying apparatus 100 or the waste supply means PS), and the combustion proceeds.

The combustion gas generated as the combustion progresses in the combustion chamber 230 vertically rises into the reaction chamber 240 and the slurry injection means 250 and the SNCR injection means 260, respectively, so that chlorine and nitrate in the combustion gas are removed by adsorption or reduction reaction while contacting the combustion gas.

The combustion gas vertically raised from the combustion chamber 230 to the reaction chamber 240 is spirally rotated by the helical air supply means 270 formed in the middle portion of the reaction chamber 240 so that the upper portion of the reaction chamber 240 As shown in Fig.

Meanwhile, the combustion gas generated by the waste combustion apparatus 200 is vertically injected into the reaction tower 310, and the combustion gas contacts the catalyst means 320 formed in the reaction tower 310, Denitrification is removed by the catalytic reaction.

Here, the combustion gas injected into the reaction tower 310 is spirally rotated by the combustion gas injection means 350 formed at the upper end of the reaction tower 310, and is moved toward the lower side of the reaction tower 310, , And the space where the denitrification reaction of the reaction tower 310 is performed by the heat exchange steam layer 330 always has the optimum denitrification reaction temperature.

Accordingly, not only nitrification substances in the combustion gas but also chlorine substances can be removed. In this case, the time required for the adsorption or reduction reaction is prolonged by maximizing the traveling time of the combustion gas in the reaction chamber 240 And the adsorption or reduction reaction area is increased, so that the efficiency of removing harmful substances in the combustion gas can be improved.

Although the present invention has been described with reference to the specific embodiments, various modifications may be made without departing from the scope of the present invention. Accordingly, the scope of the invention is not to be determined by the embodiments described, but should be determined by equivalents of the claims and the claims.

Claims (8)

A sludge drying device (100) for drying the sludge;
The dried sludge or waste supplied from the outlet gate 170 of the sludge drying apparatus 100 or the waste supply means PS is supplied through the input means 220 through the burner 210 generating high temperature heat, A combustion chamber 230 for burning in the furnace;
A reaction chamber 240 communicating with the upper side of the combustion chamber 230 and providing a reaction space for reducing harmful substances in the combustion gas burned in the combustion chamber 230 through an adsorption or reduction reaction;
A slaked lime injecting means 250 disposed at an upper portion of the reaction chamber 240 for injecting slaked lime into the inner space of the reaction chamber 240 to remove chlorine in the combustion gas;
An SNCR injection means 260 disposed at an upper portion of the reaction chamber 240 to inject urea water into the inner space of the reaction chamber 240 to remove nitric oxide from the combustion gas; And
A spiral air supply means 270 is provided in the middle of the reaction chamber 240 to inject spiral air into the inner space of the reaction chamber 240 to rotate the combustion gas moving along the reaction chamber 240 in a spiral manner, ; And
A waste combustion device (200) comprising a combustion chamber (230) and a drain (280) for discharging the ash generated during combustion to the outside; And
And a selective catalytic reaction apparatus 300 for performing a catalytic reaction while heat-exchanging combustion gas generated during combustion of the waste combustion apparatus 200 with hot air of a high temperature of the waste combustion apparatus 200 to coagulate harmful substances in the combustion gas A waste treatment system using a waste combustion device. 2. The system according to claim 1, wherein the SNCR injection means (260)
A spray nozzle 261 provided at an upper portion of the reaction chamber 240 for spraying urea water to the upper side of the reaction chamber 240;
A urea water storage tank 262 for storing the number of elements and supplying urea water to the injection nozzle 261; And
And a steam supply means (STEAM) configured in a connection pipe connecting the injection nozzle (261) and the urea water storage tank (262). 3. The apparatus of claim 1, wherein the helical air supply means (270)
An installation ring 271 installed at an intermediate portion of the reaction chamber 240 to surround the outer circumferential surface of the reaction chamber 240;
An injection pipe 272 communicating with the outer circumferential surface of the mounting collar 271 to inject air from an external air supply means (not shown) into the mounting collar 271; And
A plurality of reaction chambers 240 are formed in the reaction chamber 240 so that air is injected into the reaction chamber 240 and the injection angle is adjustable, (273). ≪ RTI ID = 0.0 > 27. < / RTI > delete The sludge drying apparatus (100) according to claim 1,
A drying chamber (110) for providing a space for drying while the sludge is moved;
An outer steam chamber 120 configured to surround the outside of the drying chamber 110 and allowing the hot air to move to the outer surface of the drying chamber 110 to indirectly dry the sludge;
A central steam shaft 140 rotatably installed in the center of the drying chamber 110 and allowing the sludge to move inside the drying chamber 110 and allowing hot air to move inside the drying chamber 110 to dry the sludge indirectly;
A sludge supply unit 150 connected to one end of the drying chamber 110 to supply a predetermined amount of sludge to the drying chamber 110;
An outlet gate 170 corresponding to a lower portion of the discharge silo 160 formed at the other end of the drying chamber 110 and allowing sludge dried by indirect hot air to be discharged; And
And an exhaust port (180) corresponding to an upper portion of the discharge silo (160) and discharging the combustion gas generated when the sludge is dried. The apparatus of claim 1, wherein the selective catalytic reaction apparatus (300)
A cylindrical reaction tower 310 for providing a space for catalytic reaction of the combustion gas while moving;
A catalyst means 320 formed in the reaction tower 310 and allowing the combustion gas to catalyze the reaction so that the harmful substance is denitrified;
A heat exchange steam is provided which surrounds the outside of the reaction tower 310 and receives hot air from the waste combustion apparatus 200 to transfer hot air to the outer surface of the reaction tower 310, A layer 330;
A combustion gas injection means 350 formed at an upper end of the reaction tower 310 to inject a combustion gas into the space inside the reaction tower 310 spirally;
An exhaust means 360 formed at the lower end of the reaction tower 310 for supplying a combustion gas denitrified by the catalytic reaction with the catalyst means 320 to the cleaning and dust collecting apparatus SNAS; And
And a discharging means (370) disposed at the lower end of the reaction tower (310) for discharging the denitrified substances, which have been denitrified by the catalytic reaction with the catalyst means (320), to the outside. Processing system. 7. The fuel cell system according to claim 6, wherein the combustion gas injection means (350)
An injection ring 351 having a pipe structure installed at the upper end of the reaction tower 310 so as to surround the inner peripheral surface of the reaction tower 310;
A supply pipe 352 communicating with the outer circumferential surface of the injection ring 351 to supply the combustion gas from the waste combustion device 200 or the filtration device FTAS to the inside of the injection ring 351; And
And a plurality of combustion gas injection tubes 353 having a predetermined interval and communicating with the inner circumferential surface of the injection ring 351 so that the combustion gas is injected into the reaction tower 310 and the injection angle can be adjusted Wherein the waste incinerator is a waste incinerator. The method according to claim 1,
A boiler (BO) configured at the rear end of the waste combustion apparatus (200) and capable of heating using hot hot air;
A steam turbine generator GEN for generating hot air from the boiler BO;
A dust collecting device (INAS) disposed at the rear end of the boiler (BO) for collecting fine dust in the combustion gas and spraying the liquid slag to treat sulfated and chlorinated substances in the combustion gas;
A filtration device (FTAS) of a bag filter type which is formed between the rear end of the dust collecting device INAS and the selective catalytic reaction device 300 and sucks the finely pulverized lime powder from below through the upper part and filters the filtrate; And
Further comprising a cleaning and dust collecting device (SNAS) disposed at the rear end of the selective catalytic reaction device (300) for discharging only the colorless / odorless vapor or gas from which harmful substances in the combustion gas have been completely removed to the outside Waste treatment system using waste combustion device.

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