KR20070010500A - An incineration method of waste and its device, in that waste gas from incinerator is recycled, mixed with oxygen and applied for burning - Google Patents

Abstract

A waste incinerating method for recirculating and mixing exhaust gas with oxygen and a device thereof are provided to suppress emission of the exhaust gas generated in burning the wastes, to improve heating efficiency by drying wet waste and recollecting surplus heat, to maximize energy-converting efficiency by increasing oxygen ratio and heightening burning temperature, and to reduce the driving cost by reducing the amount of chemicals used in removing harmful gas. A waste incinerating device(1) for recirculating and mixing exhaust gas with oxygen comprises an incineration furnace(10) formed with a waste inputting hopper(13) on the upper end, combustion chambers(12) to burn wastes inside, and an ash outlet(14) on the lower end; a waste heat boiler(50) connected at one side of the incineration furnace by a pipe(5a) to produce steam by using hot recirculated gas from the incineration furnace as a heat source; a reaction tower(60) connected at one side of the waste heat boiler by a pipe(5b) to reduce temperature of recirculated gas from the waste heat boiler and to remove harmful gas; a back filter(70) connected at one side of the reaction tower and formed with a filter(71) inside to remove harmful substances in the recirculated gas out of the reaction tower; a recirculating means(100) having supply pipes(101,101a~101e) connected between the back filter and the combustion chambers to recirculate gas from the back filter to the combustion chambers of the incineration furnace, and a blower(102) installed on the supply pipes to send the gas; and an air supplementing unit(110) connected with the supply pipe to selectively add air according to the amount of recirculated gas. The air supplementing unit connects an air inflow pipe(111) with the supply pipe to insert outer air into the supply pipe when the gas amount is small.

Description

An incineration method of waste and its device, in that waste gas from incinerator is recycled, mixed with oxygen and applied for burning}

1 is a view showing the entire waste incineration apparatus according to the present invention,

2 is a view showing a combustion means in a waste incineration apparatus according to the present invention;

3 is a view showing a dryer in the waste incineration apparatus according to the present invention,

Figure 4 is a block diagram showing a central control panel for controlling the waste incineration apparatus according to the present invention,

5 is a process chart showing a waste incineration method according to the present invention.

<Description of Signs of Major Parts of Drawings>

1: incinerator 5a to 5e: piping

10: incinerator 11: first combustion chamber

11a: first auxiliary burner 12: second combustion chamber

12a: 2nd auxiliary burner 13: hopper

14: combustion material outlet 15: outlet

20: combustion means 20a: drying stage nozzle / grate

20b: combustion end nozzle / grate 20c: afterburner nozzle / grate

21a, 21b, 21c: Mixing chamber 22: Pressure regulating valve

23: grate 24: pressure chamber

25: nozzle

30: dryer 31: gas supply pressure chamber

32: drying nozzle

50: waste heat boiler 51: steam tank

52: turbine generator 60: reaction tower

70: bag filter 71: filter

80: catalyst deodorization tower 85,102b: manned blower

90: stack

100: recirculation gas recirculation means

101,101a, 101b, 101c, 101d, 101e: supply pipe

102: blower 102a, 102c: gas supply blower

110: air supplement means 111: air inlet pipe

115a to 115l: control damper 120: oxygen supply means

121a to 121d: oxygen supply pipe 122: oxygen storage tank

123: oxygen production apparatus 124a to 124d: oxygen supply control valve

130: sensor 131: gas amount detection sensor

132: temperature sensor 133: oxygen detection sensor in the gas

135: pressure regulator

140a, 140b: IR Infrared Temperature Sensor 140c ~ 140i: Temperature Gauge

150: central control panel 151: recirculating gas situation detection device

152: oxygen control device control unit 153: gas control device

154: damper control unit 155: PACKAGE equipment control unit

156: temperature controller

201: incineration process 201a: drying process

201b: first combustion process 201c: second combustion process

202: steam production process 203: temperature reduction and harmful gas removal process

204: process for removing harmful substances 205: recycle gas recirculation process

206: air replenishment step 206a: oxygen supply step

207: exhaust gas purification process 208: exhaust process

The present invention relates to a waste incineration method and a device in which an incinerator exhaust gas is recycled and mixed with oxygen, and more particularly, by recycling the exhaust of the exhaust gas during the waste incineration process into the atmosphere and reusing it by mixing with oxygen in the combustion of the waste. Reduction and restraint of exhaust gas, recovery of exhaust gas heat, rapid drying of waste to increase calorific value and increase oxygen enrichment rate in recycled exhaust gas. The present invention relates to a waste incineration method and apparatus in which an incinerator exhaust gas maximized energy conversion efficiency is recycled and mixed with oxygen.

In general, the incinerator is an incinerator for burning waste, a boiler for use as energy by using the high temperature of the exhaust gas discharged from the incinerator, and a reaction for removing harmful gases and foreign substances from the exhaust gas passing through the boiler. The tower and bag filter, and the stack to discharge the clean gas discharged from the atmosphere to the atmosphere,

The incinerator burns by introducing excess air, and has a limitation in increasing the calorific value due to the high moisture content of the waste.

In addition, when the waste is burned, various harmful gases are contained in the exhaust gas, and chemicals are used to remove the harmful gases. However, there is a limit in discharging the harmful gases as clean gas, and lime, activated carbon, ammonia, etc. Eggplant uses the drug, so there is a problem that requires a lot of operating costs.

On the other hand, social disputes are increasing day by day with the seriousness of environmental problems and the issue of environmental pollution. Is reaching.

An object of the present invention for solving the above-described problems is to incinerate and burn wastes by inhibiting and recycling the exhaust gas generated during the waste incineration process.

By increasing the amount of heat generated by incineration method by drying the wastes containing moisture by recovering the excess heat and increasing the oxygen enrichment rate, it maximizes the energy conversion efficiency due to the increase of the combustion temperature due to low air consumption and high temperature combustion, The present invention provides a waste incineration method and apparatus in which oxygen and mixed waste gas are recycled by recirculating incinerator exhaust gas, which can reduce operating costs by reducing the use of chemicals.

The present invention for achieving the above object is an incineration step of burning the waste into the combustion chamber inside the incinerator; A steam production process of supplying high temperature recycle gas discharged through the incineration process to a waste heat boiler to produce steam for conversion into energy; A temperature reduction and noxious gas removal step of reducing the temperature and removing the noxious gas by supplying the recycle gas passed through the steam production process to the reaction tower; A harmful substance removal step of removing the harmful substances contained in the recycle gas by supplying the recycle gas that has passed the temperature reduction and harmful gas removal process to a bag filter; A recycle gas recirculation process of recirculating the recycled gas that has passed through the harmful substances removal process to a combustion chamber of the incinerator; It characterized in that it comprises an air replenishment process for selectively replenishing the air according to the amount of recycled gas during the recirculation gas recirculation process applied to the combustion of the waste.

In addition, a waste inlet hopper is formed at the upper end and a combustion chamber is provided therein to burn the waste therein; A waste heat boiler installed at one side of the incinerator to be connected to a pipe and using the high temperature recycle gas discharged from the incinerator as a heat source; A reaction tower installed on one side of the waste heat boiler to reduce the temperature of the recycle gas discharged from the waste heat boiler and remove harmful gas; A bag filter installed at one side of the reaction tower to be connected to a pipe and having a filter therein to remove harmful substances contained in the recycle gas discharged from the reaction tower; Recirculation gas recirculation means including a supply pipe connecting the bag filter and the combustion chamber to recycle the recirculated gas discharged from the bag filter to the combustion chamber of the incinerator, and a blower installed on the supply pipe to blow the recirculation gas; It is installed to be connected to the supply pipe characterized in that it comprises an air supplement means for selectively replenishing the air in accordance with the amount of recycle gas to be recycled.

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

Detailed description of the same configuration and operation as in the prior art will be omitted.

1 is a view showing the entire waste incineration apparatus according to the present invention, Figure 2 is a view showing the combustion means in the waste incineration apparatus according to the invention, Figure 3 is a view showing a dryer in the waste incineration apparatus according to the present invention 4 is a block diagram showing a central control panel for controlling the waste incineration apparatus according to the present invention.

Prior to the description, in the present invention, since the entire amount of the exhaust gas generated during the combustion of the waste is recycled, it will be referred to as a recycle gas.

Incinerator 1 according to the invention is largely incinerator 10, waste heat boiler 50, reaction tower 60, bag filter 70, recirculation gas recirculation means 100, air replenishment means 110, oxygen Supply means 120, and the central control panel 150 for controlling the respective devices.

First, the incinerator 10 has a waste input hopper 13 is formed at the top and the combustion chamber (11) 12 is provided to combust the waste introduced through the input hopper 13 therein, one side lower The combustion material discharge port 14 is formed to discharge the combustion material generated after combustion of the waste to the outside.

In addition, an outlet 15 for discharging the recycle gas generated when the waste is burned is formed at one upper side of the combustion chambers 11 and 12 and is connected to the waste heat boiler 50.

In addition, the waste heat boiler 50 is installed at one side of the incinerator 10 and connected to the outlet 15 of the incinerator 10 and the pipe 5a, and the high temperature discharged from the incinerator 10 (about 1200 ° C.). The above-mentioned recycle gas is used as a heat source to produce steam. The steam produced in the waste heat boiler 50 is sent to the steam tank 51 to operate the turbine generator 52 to be used as energy, such as electricity production.

The recycled gas cooled to about 230 ° C. or less in the waste heat boiler 50 contains dust and harmful substances in various forms, so that the harmful substances must be discharged to the atmosphere by reducing the harmful substances within the emission allowance standard for environmental conservation. Recycle gas (exhaust gas) treatment equipment is divided into dust, hydrogen chloride (HCl), sulfur oxides (SOx) and dioxin removal equipment, in the present invention, semi-dry alkali absorption reaction tower (60) as dust, hydrogen chloride, sulfur oxides and dioxin removal equipment ) And a bag filter 70 are adopted.

Subsequently, the reaction tower 60 is installed on one side of the waste heat boiler 50 and is a semi-dry alkali absorption reaction tower 60 connected to the gas discharge pipe 5b of the waste heat boiler 50, and the waste heat boiler 50 Recirculation gas having a temperature of about 230 ° C.) is reduced to about 200 ° C. and harmful gas contained in the recycle gas is removed.

That is, the recycle gas passing through the waste heat boiler 50 flows into the reaction tower 60 at a temperature of about 230 ° C. to react hydrogen chloride and sulfur oxide with slaked lime (Ca (OH) ₂ ) slurry. In addition, the harmful acid gas contained in the recycle gas is completely removed by generating a harmless neutral salt (CaCl ₂ , CaSO ₃ ). Water in the slaked lime slurry is vaporized in contact with the recycle gas so that water does not occur in the reaction tower 60.

By reducing the recycle gas temperature in the reaction process of the reaction tower 60, it is possible to prevent dioxin regeneration and to reduce droplets, and to make it suitable for the operation temperature of the bag filter 70, which is a post-preventing facility, to increase the efficiency of removing harmful acid gases. Meanwhile, fly ash and neutralized salt are collected in the lower part of the reaction tower and then transferred to the reprocessing facility.

And, the bag filter 70 is installed on one side of the reaction tower 60 is connected to the gas discharge pipe (5c) of the reaction tower 60, the inside of the recirculation gas passed through the reaction tower 60 A filter 71 is installed to remove harmful substances such as dust.

On the other hand, since the waste heat boiler 50, the reaction tower 60, the bag filter 70 is well known, a detailed description thereof will be omitted.

In addition, the recirculation gas recirculation means 100 may recycle the recirculated gas discharged from the bag filter 70 to the combustion chambers 11 and 12 of the incinerator 10. Supply pipes 101 (101a to 101d) connecting the 12 and blowers 102 provided on the supply pipes 101 and 101d to blow recirculating gas.

Here, the outlet side of the supply pipe 101 is branched into a plurality, that is, the dry end gas supply pipe 101a, the combustion end gas supply pipe 101b, and the post combustion that connect the first combustion chamber 11 from the supply pipe 101. However, it consists of the gas supply pipe 101c, the 2nd combustion chamber gas supply pipe 101d which connects the 2nd combustion chamber 12, and the waste drying recirculation gas supply pipe 101e which connects the dryer mentioned below.

Therefore, the gas recycled through the supply pipe 101 is supplied to the first and second combustion chambers 11 and 12 and the dryer 30 to be described below by the respective supply pipes 101a to 101e. .

In addition, each of the supply pipes 101 (101a to 101e) has a recirculating gas supply control damper 115a and a gas control damper 115b at a predetermined position so that the amount of gas flowing through the internal passage can be finely controlled. , Air supply control damper 115c, gas induction supply control damper 115d, second combustion chamber gas supply control damper 115e, dry end gas control damper 115f, combustion end gas control damper 115g, post combustion stage The gas regulating damper 115h, the recirculating gas supply regulating damper 115i, and the first combustion chamber gas supply regulating damper 115j are provided.

As shown in the figure, the installation position of the control dampers 115a to 115j is preferably installed at the inlet and outlet sides of the supply pipes 101 and 101a to 101e, and the blower 102 is installed. Various changes are possible depending on the purpose.

Meanwhile, control dampers 115k and 115l are also installed in the pipes 5d and 5e connecting the bag filter 70 and the catalyst deodorization tower 80 and the stack 90 to be described below.

In addition, the blower 102 is installed at the inlet side of the supply pipe 101 and attracted blower 102b for attracting recycle gas discharged from the bag filter 70 to the supply pipe 101 side,

It is installed at the outlet side of the supply pipe 101 to supply recycle gas to the drying end gas supply pipe 101a, the combustion end gas supply pipe 101b, the post combustion end gas supply pipe 101c, and the waste drying recycle gas supply pipe 101e. A gas supply blower (102a)

It is comprised by the 2nd combustion chamber gas supply blower 102c installed in the said 2nd combustion chamber gas supply pipe 101d, and supplying recycle gas to the 2nd combustion chamber 12. As shown in FIG.

In addition, the air supplement means 110 is installed to be connected to the supply pipe 101 to selectively replenish air in accordance with the amount of recycle gas to be recycled.

The air supplement means 110 is connected to the air inlet pipe 111 to the supply pipe 101 is made to introduce external air when the amount of recirculated gas to be recycled is insufficient.

An air supply control damper 115c is also installed in the air inlet pipe 111.

That is, the amount of gas recirculated along the supply pipe 101 is detected by the gas amount detecting sensor 131 and the recirculating gas situation detecting device 151 which will be described below, and is burned through the control of the central control panel 150 receiving the data. The air supply control damper 115c is controlled to the amount of gas insufficient to supply air to the combustion chambers 11 and 12.

If the amount of gas recycled along the supply pipe 101 is large, the air supply control damper 115c is closed to stop supply of air.

As such, when the amount of recirculated gas recycled along the supply pipe 101 gradually increases, the amount of air supplied through the air inlet pipe 111 gradually decreases. On the contrary, when the amount of recirculated gas recycled gradually decreases, the amount of air supplied gradually increases. Will increase.

In addition, in order to recycle the recycled gas after combustion and use it for the combustion of waste, it is necessary to perform combustion by supplying insufficient oxygen in the gas phase. Accordingly, the oxygen supply means 120 is provided to communicate with the supply pipes (101a to 101d) so that the high-purity oxygen can be mixed and supplied to the recycle gas in which the air is selectively mixed.

The oxygen supply means 120 is the drying end gas supply pipe 101a, combustion stage gas supply pipe 101b to supply oxygen of 95% or more, more preferably 99% or more, to the recycle gas in which the air is selectively mixed. , The post combustion end gas supply pipe 101c, the second combustion chamber gas supply pipe 101d, the dry end oxygen supply pipe 121a, the combustion end oxygen supply pipe 121b, the post combustion end oxygen supply pipe 121c, and the second combustion chamber oxygen supply pipe ( 121d) is connected to each other to install an oxygen storage tank 122, the oxygen storage tank 122 is made by connecting / installing an oxygen manufacturing apparatus 123 for producing and supplying oxygen.

In addition, each of the oxygen supply pipe (121a to 121d), the drying stage oxygen supply control valve 124a, the combustion stage oxygen supply control valve at a predetermined position so as to finely control the amount of flowing oxygen by adjusting the opening and closing amount of the inner passage ( 124b), the post combustion stage oxygen supply control valve 124c, and the 2nd combustion chamber oxygen supply control valve 124d are provided, respectively.

Therefore, the high purity oxygen supplied from the oxygen production device 123 and the oxygen storage tank 122 is burned through the respective oxygen supply pipes 121a to 121d and the oxygen supply control valves 124a to 124d to be described below. The mixing stage 21a, the combustion stage mixing chamber 21b, the post combustion stage mixing chamber 21c, and the second combustion chamber supply pipe 101d of the means 20 are respectively supplied to the mixing stages 21a to 21c. ), The recycle gas and the high-purity oxygen are mixed to supply oxygen in the recycle gas to the combustion chambers 11 and 12 at a ratio of about 21% or more (adjust the oxygen ratio increase according to the combustion conditions).

Meanwhile, the combustion chambers 11 and 12 of the incinerator 10 are located above the first combustion chamber 11 that burns the waste and the first combustion chamber 11 and burn the gas generated by burning the waste again. Consisting of a second combustion chamber 12.

Here, the first and second combustion chambers 11 and 12 are respectively provided in the drying stage mixing chamber 21a, the combustion stage mixing chamber 21b, the post combustion stage mixing chamber 21c, and the second combustion chamber supply pipe 101d. Each is supplied with a recycle gas containing at least 21% oxygen and applied to combustion.

In addition, the grate of the first combustion chamber 11 includes the drying end gas supply pipe 101a, the combustion end gas supply pipe 101b, the post combustion end gas supply pipe 101c, the drying end oxygen supply pipe 121a, and the combustion end oxygen supply pipe. (121b) and the post-combustion stage oxygen supply pipe (121c) are respectively connected to the combustion means to supply the recycle gas mixed with pure oxygen to the first combustion chamber (11) to burn while stirring and moving the waste in a wave type 20 is provided.

The combustion means 20 is provided with a plurality of steps (three in the drawing) are provided stepwise in the grate of the first combustion chamber (11). That is, the plurality of combustion means 20 are provided with a stepped step is composed of a drying stage nozzle / grate 20a, a combustion stage nozzle / grate 20b, the post combustion stage nozzle / grate 20c from above.

Here, the drying stage nozzle / grate 20a, the combustion stage nozzle / grate 20b, the post-combustion stage nozzle / grate 20c is made of the same structure, respectively, the combustion means 20, the drying stage Connected to the gas supply pipe 101a, the combustion end gas supply pipe 101b, the post combustion end gas supply pipe 101c and the dry end oxygen supply pipe 121a, the combustion end oxygen supply pipe 121b, and the post combustion end oxygen supply pipe 121c. A dry stage mixing chamber 21a, a combustion stage mixing chamber 21b, a post combustion stage mixing chamber 21c, which is installed to mix recycle gas and oxygen of high purity;

The grate 23 having a plurality of independent pressure chambers 24 formed therein and spaced apart from the mixing chambers 21a to 21c, respectively, and having a plurality of nozzles 25 at one side of each of the pressure chambers 24. Wow,

It is installed to connect each of the mixing chambers 21a to 21c and the plurality of pressure chambers 24, and each pressure to inject the recycle gas mixed with pure oxygen through the nozzle 25 in a sequential wave type. It consists of a pressure regulating valve 22 for regulating the pressure of the gas supplied to the chamber 24.

Accordingly, the combustion means 20 controls the pressure regulating valve 22 to supply gas through the independent pressure chambers 24 and the nozzles 25 as shown in a, b, c, d, In order to e.f.g, the combustion is progressed by stirring / moving the waste in a wave form while supplying a deviation of the pressure of 50m / sec to 150m / sec sequentially.

On the other hand, most of the waste contains water, so if the amount of moisture is high, even if the waste heat is high, the calorific value does not come out.

Therefore, the dryer 30 is installed on the lower sidewall of the input hopper 13 so as to quickly dry the waste.

The dryer 30 is installed on the lower sidewall of the inlet hopper 13 so that the waste drying recycle gas supply pipe 101e is connected to receive the recycle gas and the gas supply pressure. Coupled to one side of the chamber 31 is composed of a drying nozzle 32 for injecting the recycle gas to the waste side.

That is, waste containing moisture introduced into the input hopper 13 of the incinerator 10 is rapidly dried while passing through the dryer 30 and then moved to the first combustion chamber 11 to induce rapid combustion to generate heat. It will increase the heat recovery at the same time.

In addition, the gas amount, temperature, and gas of the recycle gas in which air is selectively mixed at the supply pipe 101 at the point where the recycle gas and the air are mixed, that is, the supply pipe 101 and the air inlet pipe 111 are combined. A plurality of sensors 130 are installed to detect the amount of oxygen in the gas, that is, the sensor 130 is the gas amount detection sensor 131, the temperature detection sensor 132, the oxygen amount detection sensor 133 in the gas It is configured and sends the data of the detected gas flow situation in the gas to the place where the recycle gas situation detection device 151 is configured. The central control panel 150 is configured to receive data sensed by the recycle gas situation detection device 151 and send a signal to each device for control.

In addition, each of the devices constituting the incineration device 1 of the present invention has a temperature control device 156, the first combustion chamber of the incinerator 10 to receive the temperature of the recycle gas applied to the combustion and the temperature data of each device. The first combustion chamber IR infrared temperature sensor 140a provided in 11, the second combustion chamber IR infrared temperature sensor 140b provided in the second combustion chamber 12, and the temperature gauge 140c provided in the waste heat boiler 50. , The temperature gauge 140d provided in the waste heat boiler 50 gas discharge pipe 5b, the temperature gauge 140e provided in the gas discharge pipe 5c of the semi-dry alkali absorption tower 60, and the bag filter 70. Primary to tertiary temperature gauges 140f to 140h provided therein are provided.

Accordingly, in order to control the temperature of each device, a combustion temperature condition is set and input to the central control panel 150, and the temperature data of the IR infrared temperature sensors 140a and 140b and the temperature gauges 140c to 140h are input to the central control panel 150. 150 is sent to the configured place to calculate the data and control according to the temperature of the set value to derive the optimum combustion conditions.

On the other hand, the first combustion chamber IR infrared temperature sensor 140a and the second combustion chamber IR infrared temperature sensor 140b provided on the first and second combustion chambers 11 and 12 side of the incinerator 10 are sensors of a combustion control system. The quick response is made to measure the combustion temperature instantaneously to realize stable combustion, stabilize the evaporation fluctuations and improve the properties of the recycled gas.

In addition, the first auxiliary burner 11a and the second auxiliary burner 12a are installed in the first and second combustion chambers 11 and 12 to serve as auxiliary combustion.

In addition, in order to control the pressure of the facility as described above, the furnace internal pressure control device 135 is installed in the pipe 5a between the second combustion chamber 12 of the incinerator 10 and the waste heat boiler 50. It is desirable to check and regulate the pressure to ensure stable combustion.

And, if the amount of recycled gas discharged from the bag filter 70 exceeds the amount of gas to be applied for combustion, the pipe (5d) at the beginning of the supply pipe 101 to discharge the excess recycled gas to the outside after purification A catalyst deodorization tower 80 which is branched and connected / installed to purify recycle gas, and is connected to one side of the catalyst deodorization tower 80 by a pipe 5e and clean gas purified by the catalyst deodorization tower 80 The stack 90 is discharged to the outside is provided.

An important part of the catalyst deodorization tower 80 is the catalyst composition of a special SCR (Selective Catalytic Reduction) catalyst tower. That is, TiO ₂ , V ₂ O ₅ , WO ₃ and the like are made up of about 65% by weight. The catalyst is composed of three layers. In the first layer, NOx is removed and in the second and third layers, Dioxin is decomposed by CO ₂ , H ₂ O, HCl, and the like.

Therefore, in order to apply the recycle gas discharged from the bag filter 70 to the total amount of combustion, the recycle gas supply control damper 115a, the gas control damper 115b and the induction blower 102b are operated to attract the supply pipe 101. In addition to the recirculating gas applied to the combustion, the recirculating gas remaining in the catalyst deodorization tower 80, the flue (90) and the control dampers (115k) (115l) and the induced blower (85) installed in the pipe (5d) (5e) is connected. ) To be sent to the catalyst deodorization tower 80 to purify the clean gas to the stack 90 after purification.

In this case, when the recycle gas is recycled to the combustion chambers 11 and 12, the operation of the catalyst deodorization tower 80 is stopped while closing the control dampers 115k and 115l on the catalyst deodorization tower 80 side. Done.

In this way, when the amount of gas to be applied for combustion is large, the entire amount of recycled gas is used so that the exhaust gas is not discharged to the atmosphere.

4 is a configuration diagram showing the central control panel for controlling the incineration apparatus described above, and only important parts will be described.

The central control panel 150 is a circulating gas situation detection device 151, oxygen control device control unit 152, gas control device 153, damper control device 154, PACKAGE facility control device 155, temperature control It receives data from the device 156 and sends a signal to each device to control it.

First, the recirculating gas situation detecting device 151 is a gas amount, temperature, gas in the gas amount detection sensor 131, the temperature detection sensor 132, the oxygen amount detection sensor 133 in the gas installed in the supply pipe 101 Detects the amount of oxygen and the like and sends the data to the central control panel 150.

The oxygen control device control unit 152 is provided with the oxygen amount data detected by the oxygen amount sensor 133 in the gas, wherein the oxygen produced in the oxygen production apparatus 123 to the oxygen storage tank 122 When supplied, the drying stage oxygen supply control valve 124a, the combustion stage oxygen supply control valve 124b, the post combustion stage oxygen supply control valve 124c, and the second signal are signalized by the oxygen control device control unit 152. The oxygen amount programmed by controlling the combustion chamber oxygen supply control valve 124d is converted into the gas supply pressure chamber 31 of the dryer 30, the drying stage mixing chamber 21a, the combustion stage mixing chamber 21b, and the post combustion stage mixing chamber. It is an apparatus to supply to 21c.

The gas control device 153 is supplied to the drying stage mixing chamber 21a, the combustion stage mixing chamber 21b, and the post-combustion stage mixing chamber 21c to mix recycle gas and oxygen mixed with each other. 50 m / sec to 150 m by controlling the pressure regulating valve 22 to the set value given to the central control panel 150 when supplied to the grate 20a, the combustion end nozzle / grate 20b, and the post combustion end nozzle / grate 20c. It is a device that supplies the supply pressure and the gas amount in a wave form by giving a deviation of pressure in / sec so that the waste can be stirred, moved, and burned in a wave form.

The damper control device 154 is a program set in advance in the central control panel 150 receives the data of the gas flow situation from the gas amount sensor 131, the temperature sensor 132, the oxygen amount sensor 133 in the gas It is a device for adjusting the respective control dampers (115a to 115l) by receiving the converted signal.

The PACKAGE facility control device 155 is a device for controlling a hydraulic device, an air compressor, a truck scale, a garbage crane, a waste crusher, a gas discharge monitoring device, an odor removal adsorption tower, and the like.

The temperature control device 156 receives the temperature of the recycle gas and the temperature data of each device from the IR infrared temperature sensors 140a and 140b and the temperature gauges 140c to 140h installed in the respective devices. It is a device that induces the best combustion condition by calculating the data and controlling it according to the preset temperature.

Hereinafter, the operation of the incinerator 1 according to the present invention will be described.

First, the gas supply blower 102a and the control dampers 115f to 115j are operated at the same time to raise the temperature in the combustion chambers 11 and 12 to 600 ° C or more before the waste is introduced, and the air of the air inlet pipe 111 The supply control damper 115c is opened to inject air into the combustion chambers 11 and 12. Subsequently, the auxiliary burners 11a and 12a of the combustion chambers 11 and 12 are operated to raise the temperature of the combustion chambers 11 and 12, and then waste is introduced into the input hopper 13.

The waste introduced through the input hopper 13 is incinerated and burned while continuously conveying the drying stage nozzle / grate 20a, the combustion stage nozzle / grate 20b, and the post combustion stage nozzle / grate 20c in a wave form. Ash is discharged to the combustion material outlet 14.

The temperature of the recirculation gas of the outlet 15 of the incinerator 10 coming out by incineration of the waste is about 1200 ° C. or more, and the high temperature recycle gas is moved to the waste heat boiler 50, and in the waste heat boiler 50. The high temperature recycle gas is used as a heat source to produce steam to be sent to the steam tank 51, and the steam sent to the steam tank 51 operates the turbine generator 52 to be used as electricity production and energy. .

The temperature of the recycle gas discharged from the waste heat boiler 50 is about 230 ° C. and moves to the semi-dry alkaline absorption tower 60, and the recycle gas moved to the semi-dry alkali absorption tower 60 is about 200 ° C. At the same time as the harmful gas is removed and then moved to the bag filter 70.

Here, the semi-dry alkaline absorption tower 60 does not use chemicals when the recycle gas is recycled to the combustion chambers 11 and 12 in its entirety. In this case, only the water is sprayed to reduce the temperature of the recycle gas and then the bag filter. It is economical to reduce the use of the chemical because it is moved to (70), and the harmful gas is removed by using the chemical together with water only when it is desired to discharge the remaining recycle gas into the atmosphere in addition to the recycle gas applied to the combustion.

Subsequently, the recycle gas moved to the bag filter 70 passes through the filter 71 provided inside the bag filter 70 to remove dust and harmful substances contained in the gas phase.

Thereafter, the amount of gas required to apply to the combustion of the recycle gas discharged from the bag filter 70 is the blowers 102a to 102c, the respective control dampers 115a to 115j and the supply pipes 101 (101a to 101e). Through the recirculation to the combustion chamber 11, 12 of the incinerator 10 through, and the recirculation gas remaining in addition to the recirculation gas applied to the combustion to operate the control dampers (115k) (115l) and the induction blower (85) to deodorize the catalyst. After purifying the gas by moving to the tower 80, the clean gas is discharged to the stack 90.

Hereinafter, the process of recycling and simultaneously mixing oxygen to apply the recycle gas discharged from the bag filter 70 to the combustion will be described.

First, when the total amount of recycle gas is recycled, the operation of the catalyst deodorization tower 80 and the induced blower 85 is stopped and the control dampers 115k and 115l are closed.

Subsequently, the recycle gas discharged from the bag filter 70 is led to the supply pipe 101 by the recycle gas supply control damper 115a, the induction blower 102b, and the gas control damper 115b.

Here, the recycle gas required for combustion guided from the bag filter 70 to the supply pipe 101 sends the amount of gas applied to the combustion by controlling the recycle gas supply control damper 115a in the damper control device 154. .

In the above, when the amount of gas applied to combustion is large, the entire amount of gas is used, and the gas is not discharged to the atmosphere.

Subsequently, the recycle gas guided to the supply pipe 101 operates the first combustion chamber gas supply blower 102a and the first combustion chamber gas supply control damper 115j to dry-end gas supply pipe 101a and a combustion end gas supply pipe ( 101b), the gas is supplied to the post-combustion end gas supply pipe 101c.

The recycle gas supplied to each of the supply pipes 101a to 101c operates a drying stage gas control damper 115f, a combustion stage gas control damper 115g, and a post combustion stage gas control damper 115h to dry-end mixing chamber 21a. ), The combustion stage mixing chamber 21b and the post combustion stage mixing chamber 21c, respectively.

In the above, the amount of recycle gas, the temperature, the amount of oxygen in the gas is detected by the gas amount detection sensor 131, the temperature sensor 132, the oxygen amount sensor 133 in the gas to indicate the state of the gas flow to the recycle gas The data is sent to the situation detection device 151, and the central control panel 150 receives the data detected by the recycle gas situation detection device 151 and sends a signal to each device to control the mixed gas and the oxygen. It will create the conditions for the gas needed for combustion.

Here, the amount of recycled gas is sensed by the gas amount detection sensor 131 to control the air supply control damper 115c to the amount of gas insufficient for combustion to introduce air to the combustion.

On the other hand, the recycled gas supplied to the drying stage mixing chamber 21a, the combustion stage mixing chamber 21b, and the post-combustion stage mixing chamber 21c is replenished with gas after combustion to supplement the insufficient oxygen in the gas phase to combust the combustion. Should be implemented. That is, the recycle gas is supplied to the recycle gas by applying the ratio of oxygen in the original air (21%) and applied to combustion, and the oxygen enrichment rate is higher than that of oxygen (21%) in the existing air, and the recycle gas is applied to high temperature combustion at low air ratio. The amount of oxygen must be supplied uniformly.

Therefore, the oxygen amount detection sensor 133 in the gas detects the amount of oxygen in the recycle gas and transmits the data to the oxygen production apparatus control unit 152. At this time, when the oxygen produced in the oxygen production apparatus 123 is supplied to the oxygen storage tank 122, the oxygen production apparatus control unit 152 is a drying stage oxygen supply control valve as a signal signaled according to the detected oxygen amount 124a, the combustion stage oxygen supply control valve 124b and the post-combustion stage oxygen supply control valve 124c to control the programmed amount of oxygen in the dry stage mixing chamber 21a, the combustion stage mixing chamber 21b, and the post combustion. However, it is supplied to the mixing chamber 21c and mixed with the recycle gas supplied to each of the mixing chambers 21a to 21c to be applied to combustion.

In the above, the recycle gas and the pure oxygen supplied to the dry stage mixing chamber 21a, the combustion stage mixing chamber 21b, and the post-combustion stage mixing chamber 21c, respectively, are mixed with 21% or more of oxygen on the recycle gas (combustion). Adjusting the oxygen ratio increase according to the conditions) given to the drying stage nozzle / grate 20a, combustion stage nozzle / grate 20b, post-combustion stage nozzle / grate 20c is given to the central control panel 150 By controlling the pressure regulating valve 22 to a set value, the supply pressure and the gas amount are supplied in a wave form, and the waste is stirred, moved, and burned in a wave form.

That is, as shown in Figure 2 a, b, c, d, e, f, g by agitating / moving the waste in a sequential wave type while supplying a pressure deviation from 50 m / sec to 150 m / sec sequentially Combustion will proceed.

On the other hand, the second combustion chamber oxygen supply control valve 124d serves to supply pure oxygen in accordance with the ratio of the recycle gas supply amount supplied to the second combustion chamber 12.

In addition, the dryer 30 installed downstream of the input hopper 13 receives the recycle gas from the waste drying recycle gas supply pipe 101e and the recycle gas supply control damper 115i to dry the waste with hot gas. By reducing moisture, waste heat is increased and heat recovery is increased.

5 is a process chart showing a waste incineration method according to the present invention, and the repeated description of the incineration apparatus described above will be omitted.

As shown, the incineration method of the present invention is largely incineration step 201, steam production step 202, temperature and harmful gas removal step 203, hazardous material removal step 204, recycle gas recirculation step 205 And an air replenishment step 206 and an oxygen supply step 206a.

end. Incineration Process (201)

The incineration step 201 is a step of injecting waste into the combustion chambers 11 and 12 inside the incinerator 10 to combust it. That is, the waste introduced through the input hopper 13 of the incinerator 10 is burned in the combustion chambers 11 and 12, and the combustion material generated after the combustion of the waste is discharged to the outside through the combustion material outlet 14. And, the recycle gas generated during the combustion of the waste is discharged to the steam production process 202, which is the next process through the outlet (15).

Here, the incineration step 201 is a first combustion step 201b for burning waste in the first combustion chamber 11 of the incinerator 10, and the gas generated by burning the waste in the second combustion chamber 12 again. It consists of a second combustion process 201c to be combusted, the first and second combustion processes 201b and 201c are respectively applied to the recirculation gas mixed with pure oxygen to the combustion.

In addition, in the first combustion process 201b, the gas pressure supplied to the first combustion chamber 11 through the nozzle 25 is 50m / sec to 150m / sec when the recycled gas mixed with pure oxygen is applied to the combustion. By giving a deviation of the recycle gas is injected into the sequential wave type through a plurality of nozzles 25 to burn the waste while stirring and moving to the wave type.

Then, before the waste is introduced into the combustion chambers 11 and 12 of the incinerator 10, a drying process 201a is performed to dry the waste using the recycled high temperature recycle gas.

The drying process 201a is performed before the first combustion process 201b and induces rapid combustion by injecting a recycle gas to the waste side introduced into the first combustion chamber 11 through the charging hopper 13 to dry the waste. To increase the amount of heat generated and increase the heat recovery.

I. Steam Production Process (202)

The steam production process 202 is a process of producing steam for converting the high temperature recycle gas discharged through the incineration process 201 to the waste heat boiler 50 and converting it into energy.

That is, the high temperature recycle gas discharged from the incinerator 10 is supplied to the waste heat boiler 50, and the waste heat boiler 50 produces steam using the high temperature of the recycle gas and then sends it to the steam tank 51. Electricity is produced by operating the turbine generator 52, and thus the steam produced in the waste heat boiler 50 is sent to the place where it is used as energy, such as electricity production.

All. Temperature and harmful gas removal process (203)

The temperature reduction and noxious gas removal step 203 is a step of supplying the recycle gas passed through the steam production step 202 to the semi-dry alkali absorption tower 60 to reduce the temperature and remove the noxious gas.

That is, the temperature of the recycle gas from the waste heat boiler 50 of the steam production process 202 is about 230 ℃ and the temperature of the ionic temperature is reduced to about 200 ℃ in the reaction column (60). Therefore, the bag filter 70 of the next step of removing the harmful substances 204 is protected from high temperature.

In addition, as described above, when the recycle gas is supplied to the semi-dry alkali absorption tower 60, hydrogen chloride and sulfur oxides react with the slaked lime slurry to completely remove the harmful acid gas contained in the recycle gas as a harmless neutral salt. do.

On the other hand, the reaction tower 60, when recirculating the recycle gas to the combustion chamber (11) 12, the entire amount of chemicals are not used at this time, only water is sprayed to reduce the temperature of the recycle gas after the bag filter 70 It is economical because it can reduce the use of chemicals because it removes harmful gases by using chemicals together with water only when it is to be discharged to the atmosphere.

la. Hazardous Substance Removal Process (204)

The harmful substance removing step 204 is a process of removing the harmful substances contained in the recycle gas by supplying the recycle gas passed through the temperature reduction and harmful gas removing step 203 to the bag filter 70.

That is, the recycle gas discharged from the semi-dry alkali absorption tower 60 is supplied to the bag filter 70 to remove dust and harmful substances contained in the recycle gas while passing through the filter 71 in the bag filter 70. do.

hemp. Recycle gas recirculation process (205)

The recirculation gas recirculation process 205 is a process of recirculating the recirculating gas that has passed through the toxic substance removing step 204 to the combustion chambers 11 and 12 of the incinerator 10.

That is, the outlet of the bag filter 70 and the combustion chambers 11 and 12 of the incinerator 10 are connected to supply pipes 101 and 101a to 101e, and blowers 102 are supplied to the supply pipes 101 and 101a to 101e. ) And control dampers 115a to 115j are installed to recycle the recycled gas discharged from the bag filter 70 to the combustion chambers 11 and 12 of the incinerator 10 to be applied to the combustion of waste.

bar. Air Supplement Process (206)

The air replenishment process 206 is a process of selectively replenishing air to the recirculated gas recycled during the recirculation gas recirculation process 205 and applying it to the combustion of waste.

That is, the air replenishment process 206 does not supply air by closing the air supply control damper 115c of the air inlet pipe 111 when the amount of recirculated gas recycled through the supply pipe 101 is greater than or equal to the set value. Only when the amount of gas is less than the set value, the air supply control damper 115c of the air inlet pipe 111 is adjusted to supply air to the supply pipe 101 to mix the recycle gas and air.

four. Oxygen Supply Process (206a)

Oxygen supply process 206a is supplied to the recycle gas in which the air is selectively mixed by the air replenishment step 206 at the recycle gas recirculation step 205 supplying 95% or more of purity and more preferably 99% or more of oxygen to mix It is a process to do it.

That is, the sensor 130 is installed in the supply pipe 101 at the point where the recycle gas and the air are mixed to detect the amount of oxygen in the recycle gas, and the amount of oxygen insufficient in the recycle gas is preset / input in accordance with the amount of oxygen detected above. Is mixed with the recycle gas and applied to the combustion.

Here, it is preferable to adjust the oxygen ratio in the recycle gas to 21% or more, and further enriching the oxygen enrichment ratio by 5 to 6% at 21% oxygen ratio in the recycle gas enables high temperature combustion at a low air ratio.

On the other hand, in the incineration method of the present invention, when there is a large amount of recycle gas to be applied to waste combustion, the exhaust gas is not emitted to the atmosphere because all the recycle gas is used, but the amount of recycle gas in the recycle gas recycle process 205 is greater than the amount of gas to be applied for combustion. Exhaust gas purification step 207 and the exhaust gas purifying the purified clean gas in the exhaust gas purification step 207 to discharge the recycle gas remaining in addition to the recycle gas applied for combustion to the atmosphere after purification if exceeded. Process 208 is further included.

Therefore, in general, the total amount of recycle gas is recycled to the combustion chambers 11 and 12 of the incinerator 10 through the recycle gas recycle process 205, the air supplement process 206, and the oxygen supply process 206a to be applied to combustion. Therefore, the exhaust gas is not discharged to the atmosphere, and at this time, the exhaust gas purification process 207 and the exhaust process 208 are stopped.

In addition, since the recycled gas remaining only when the amount of recycled gas exceeds the amount of recycled gas to be applied for combustion is discharged after refining through the exhaust gas purification process 207 and the exhausting process 208, even if there is no emission or no exhaust gas, It will be reduced.

Table 1 shows a representative result value by analyzing the effects of the conventional incinerator and the incinerator of the present invention.

The results in Table 1 are based on the incineration amount: 4167kg / hr, operating time: 24hr / day, daily incineration: 100,000kg / day for the amount of waste properties as shown in Table 2 It is the result of mixing and reusing the waste incineration combustion, and the heat balance equation for obtaining the result of Table 1 is as follows.

■ Standard (example)

1.Incineration amount: 4167 kg / hr

2. Uptime: 24 hr / day

3. Daily incineration: 100,000kg / day

4. Set water content to 30%

Ⅰ.Calculation of element composition

1. Calorific value calculation: Dulong formula applied

H _WO = 8,100 [C] + 34,000 [H- (O / 8)] + 2,500 [S] dl / kg

= 8,100 x 0.7290 + 34,000 [0.1087- (0.1472 ÷ 8)] + 2,500 x 0.00035

= 8,977㎉ / kg (high calorific value on dry basis)

2. Low calorific value calculation (H _WL ): The calorific value of the combustion reaction uses the low calorific value based on the moisture level.

H _WL = H _WO x Flammable-600 [9H + W]

= 8,977 x 0.6593-600 x (9 x 0.0717 + 0.3000)

= 5,351 ㎉ / kg

2.Calculation of emissions: Application of mixed waste composition containing water

1) Theoretical air volume (A _WO )

A _WO = 8.89 [C] + 26.7 [HO / 8] + 3.33 [S] Nm 3 / kg

= 0.89 x 0.4807 + 26.7 x [0.0717- (0.0970 ÷ 8)] + 3.33 x 0.0002

= 5.86 Nm3 / kg

2) actual air volume (A)

A = mA _WO (excess air ratio = 1.7)

= 1.7 x 5.86

= 9.96 N㎥ / kg

※ Actual air volume (A ') at incineration of 4.167kg / hr

'A = 4.167kg / hr x 9.96 N㎥ / kg

= 41,500 N㎥ / hr

3) Actual wet combustion gas amount (G _W )

4) Actual Gun Combustion Gas (G _d )

G _d = (m-0.27) A _WO + 1.867 [C] + 0.7 [S] + 0.73 [N]

        = (1.7-0.21) x 5.86 +1.867 x 0.4870 + 0.7x 0.0002 + 0.8 x 0.0022

        = 9.63 Nm3 / kg

5) Actual Wet Emissions (G _W2 )

G _W2 = G _W1 x Incineration (kg / hr)

= 10.52 x 4,167

= 43.833 Nm 3 / hr

6) Actual Gun Emissions (G _d )

G _d1 = G _d x incineration (kg / hr)

= 9.63 x 4,167

= 40,125 Nm3 / hr

7) Combustion Water Vapor (W _g )

W _g = G _W1 -G _d1

= 43,833-40,125

= 3,708 Nm 3 / hr

II. Incinerator Passion Acid of the Invention

1. Design condition

① Incineration amount of waste [W _R ]: 4,167 ㎏ / hr

② Actual wet discharge gas amount [G _w2 ]: 43,833 N㎥ / hr

③ Average temperature of garbage input [T _w ]: 20 ℃

④ Specific pressure specific heat of air [CP _a ]: 0.310 ㎉ / N㎥ ℃

⑤ Recycle gas temperature [T _a ]: 170 ℃

⑥ Average specific heat of waste [CP _f ]: 0.475 ㎉ / N㎥ ℃ at

2.heating

① Sensible heat of garbage (Q _H )

Q _H = W _R x CP _f x T _w [㎉ / hr]

= 4,167 x 0.475 x 20

= 39,583 ㎉ / hr

② Combustion heat of garbage (Q _R )

Q _R = W _R x H _WL [㎉ / hr]

= 4,167 x 5,351

= 22,297,281 ㎉ / hr

③ Heat inflow of the supply air in the furnace (Q _A )

Q _A = A 'x C _Pa x T _a [㎉ / hr] (A' is 41,500 N㎥ / hr

= 41,500 x 0.310 x 170

= 2,187,047 ㎉ / hr

④ Total heat input

Q _1P = Q _H + Q _R + Q _A

= 39,583 + 22,297,281 = 2,187,047

= 24,523,911 ㎉ / hr

3. Output Heat (Q _OP )

① Combustion Recirculation Gas Emission Heat (Q _CT )

Q _CT = G _w2 x C _Pg x T _g [㎉ / hr]

= 43,833 C _Pg T _g

② Ignition Calorie (Q _W1 )

W Q _W1 = W _R x CP x T [㎉ / hr]

= 4,167 x 0.3 x 200

= 250,000 ㎉ / hr

③ Loss of heat due to radiant conduction in the secondary combustion chamber (Q _W2 )

∴ Q _W22 = 15% of heat input

= 3,678,587 ㎉ / ㎡hr

_W Q _W22 = 3,678,587 ㎉ / hr

④ Loss of residue (Q _r )

Unburned loss heat due to remaining carbon in the residue and loss heat due to sensible heat of the residue.

Q _r = 8,100 x α (n / (1-n)) x W _R + W _A x R _A xt _A

= (α / (1-n)) x W _R x (8,100 xn + R _A xt _A )

α: ash in 82 kg of waste 0.0582 [kg / kg]

n: Unburned carbon 0.03 in 1 kg of residue [kg / kg]

W _R : Incineration amount of garbage 1,467 [kg / hr]

W _A : Amount of residue W _A = (α / (1-n)) x W _R

r _A : Specific heat of residue ㎉ / kg ℃ = 0.25 [dl / kg ℃]

t _A : Temperature of residue ℃ = 500 ℃

∴ Qr = 92,000 ㎉ / hr

⑤ Sum of attendance

Q _OP = Q _CT + Q _W1 + Q _W2 + Qr

= 43,833 C _Pg T _g + 250,000 + 3,678,587 + 92,000

= 43,833 C _Pg T _g + 4,020,586

4. Recirculated gas outlet temperature

Heat input = heat output

24,523,911 = 48,833 C _Pg T _g + 4,20,586

P C _Pg T _g = 467,76

- trial and error

C _Pg t _g = 361.3 at 1,000 ° C

C _Pg t _g = 401.94 at 1,100 ° C

= (401.94-361.30) / (1,100-1,000)

= 0.406

Therefore = (467.76-361.30) / 0.406 = 262 ° C

Recycle gas temperature = 1,000 + 262 = 1,262 ℃

① Average static specific heat of main gas C _Pg ㎉ / N㎥ ℃

② Specific heat C _Pg1 of combustion gas at 1,262 ℃

1,000 ℃ C _Pg 0.361

1,100 ℃ C _Pg 0.365

According to the present invention as described above, by recycling the exhaust gas generated during the waste incineration process by mixing with oxygen in the incineration and combustion of the waste, by reducing the exhaust gas at a low air consumption and suppressing the emitted exhaust gas to prevent environmental pollution.

In addition, by recovering the residual heat of the recycled gas to quickly dry the waste to increase the calorific value and at the same time to mix the high-purity oxygen with the recycled gas applied to the combustion to increase the oxygen enrichment rate to the rapid complete combustion of the waste by low air ratio high temperature combustion Energy conversion efficiency is maximized with increasing temperature, which can be economically beneficial.

In addition, since the recycled gas is recycled and applied to combustion, it is possible to reduce the use of chemicals required for removing harmful gases, thereby reducing operating costs.

Claims (20)

An incineration step 201 in which waste is injected into the combustion chambers 11 and 12 inside the incinerator 10 and combusted; A steam production process 202 for supplying the high temperature recycle gas discharged through the incineration process 201 to the waste heat boiler 50 to produce steam for conversion into energy; A temperature reduction and noxious gas removal step (203) of reducing the temperature and removing the noxious gas by supplying the recycle gas passed through the steam production step (202) to the reaction tower (60); A toxic substance removal step 204 of supplying a recycle gas passed through the temperature reduction and toxic gas removal step 203 to the bag filter 70 to remove toxic substances contained in the recycle gas; A recycle gas recirculation process of recirculating the recycled gas passed through the toxic substance removing step 204 to the combustion chambers 11 and 12 of the incinerator 10; Air replenishment step 206 for selectively replenishing air according to the amount of recirculating gas in the recirculating gas recirculation process 205 and applying it to the combustion of waste materials Recycling the waste gas incinerator characterized in that it comprises a waste incineration method applied by mixing with oxygen. The method of claim 1, Wherein the air replenishment step 206, when the amount of recycled gas is small, the waste incineration method by recycling the incinerator exhaust gas mixed with oxygen, characterized in that the air is supplied to the supply pipe 101 to move the recycled gas. The method of claim 1, In the recirculation gas recirculation process 205 further comprises an oxygen supply step 206a to supply oxygen of 95% or more purity to the recirculated gas in which air is selectively mixed by the air replenishment step 206. Waste incineration method by recycling incinerator exhaust gas and mixing with oxygen. The method of claim 3, wherein The oxygen supply process 206a is provided with a sensor 130 in the supply pipe 101 at the point where the recycle gas and the air is mixed to detect the amount of oxygen in the recycle gas, the amount of oxygen insufficient in the recycle gas to the detected amount of oxygen A waste incineration method in which an incinerator exhaust gas is recycled and mixed and applied to an incinerator, wherein the amount of oxygen previously set / input is mixed with a recycle gas and applied to combustion. The method of claim 1, The incineration step 201 includes a first combustion step 201b for burning waste and a second combustion step 201c for burning the gas generated by burning the waste again. 201b) 201c is a waste incineration method in which an incinerator exhaust gas is recycled and mixed with oxygen to apply a recycle gas mixed with oxygen to combustion. The method of claim 5, The first combustion process 201b is a sequential wave type through the plurality of nozzles 25 by regulating the pressure of the recycle gas supplied to the combustion chamber 11 when the oxygen mixed recycle gas is applied to the combustion. Recycling the waste gas incinerator, characterized in that the combustion by stirring and moving the waste in a wave type to be injected into the waste incineration method. The method of claim 1, Before the waste is introduced into the combustion chamber (11, 12) of the incinerator 10, further comprising a drying step (201a) for drying the waste by using the recycle gas to recycle the incinerator exhaust gas by oxygen and Mixed waste incineration method. The method of claim 1, In the recirculating gas recirculation process 205, if the amount of recycled gas exceeds the amount of gas to be applied for combustion, the exhaust gas purification process 207 and the exhaust gas refining gas may be discharged to the outside after refining gas remaining in addition to the recycled gas applied for combustion. A waste incineration method in which an incinerator exhaust gas is recycled and mixed and applied to an incinerator exhaust gas, further comprising a discharge step 208 for discharging the clean gas purified in the gas purification step 207 to the outside. An incinerator 10 having a waste input hopper 13 formed at an upper end thereof, and having combustion chambers 11 and 12 formed therein so as to combust waste therein, and a combustion material outlet 14 formed at a lower end thereof; A waste heat boiler (50) installed on one side of the incinerator (10) so as to be connected to the pipe (5a) and producing steam by using a high temperature recycle gas discharged from the incinerator (10) as a heat source; A reaction tower (60) installed on one side of the waste heat boiler (50) to reduce the temperature of the recycle gas discharged from the waste heat boiler (50) and to remove harmful gas; The bag is installed on one side of the reaction tower 60 to be connected to the pipe (5c), the filter 71 is provided to remove the harmful substances contained in the recycle gas discharged from the reaction tower 60 therein Filter 70; A supply pipe 101 connecting the bag filter 70 and the combustion chambers 11 and 12 to recycle the recycled gas discharged from the bag filter 70 to the combustion chambers 11 and 12 of the incinerator 10 ( Recirculation gas recirculation means (100) composed of 101a to 101e and a blower (102) installed on the supply pipes (101) and (101d) to blow recirculating gas; Air replenishment means (110) installed to be connected to the supply pipe 101 to selectively replenish air in accordance with the amount of recycle gas to be recycled Recycling the incinerator exhaust gas, characterized in that consisting of waste incineration apparatus applied to mixed with oxygen. The method of claim 9, The air supplement means 110 is connected to the air inlet pipe 111 to the supply pipe 101 when the amount of recirculated gas is small to supply the outside air into the supply pipe 101, characterized in that the exhaust gas by recycling the incinerator exhaust gas Waste incinerator mixed with water. The method according to claim 9 or 10, Recirculating incinerator exhaust gas, characterized in that the oxygen supply means 120 is provided to be in communication with the supply pipe (101a to 101d) to supply the high-purity oxygen to the recycle gas mixed with the air selectively. Waste incinerator mixed with oxygen. The method of claim 11, The oxygen supply means 120 communicates with the oxygen supply pipes 121a to 121d to the supply pipes 101a to 101d to supply oxygen having a purity of 95% or more to the recycle gas in which air is selectively mixed. And an oxygen storage tank 122, in which an oxygen production apparatus 123 for producing and supplying oxygen is connected / installed to recycle the waste gas incinerator, and the waste incineration apparatus is mixed with oxygen. The method of claim 12, Combustion chambers 11 and 12 of the incinerator 10 are located in a first combustion chamber 11 that burns waste and an upper portion of the first combustion chamber 11 that burns the gas generated by burning the waste again. It consists of two combustion chambers 12, the first and second combustion chambers (11) (12) is recycled to the incinerator exhaust gas, characterized in that configured to be applied to the combustion by receiving a recycle gas mixed with oxygen, respectively, mixed with oxygen Applied waste incinerator. The method of claim 13, The bottom of the first combustion chamber 11 is installed to be connected to the supply pipes 101a to 101c and the oxygen supply pipes 121a to 121c to supply recycle gas mixed with oxygen to the first combustion chamber 11, but waste is wave-type. The waste incineration apparatus, which recycles the incinerator exhaust gas and mixes and applies oxygen to the combustion unit 20 so as to combust while stirring and moving. The method of claim 14, The combustion means 20 is connected to / installed with the supply pipes 101a to 101c and the oxygen supply pipes 121a to 121c, and mixing chambers 21a to 21c for mixing recycle gas and oxygen, A grate 23 spaced apart from the mixing chambers 21a to 21c and having a plurality of independent pressure chambers 24 formed therein, and a plurality of nozzles 25 provided at one side of each of the pressure chambers 24; The pressure chamber 24 is installed to connect the mixing chambers 21a to 21c and the plurality of pressure chambers 24, respectively, to inject the recycle gas mixed with oxygen through the nozzle 25 in a sequential wave type. 24. The waste incineration apparatus which recycles the incinerator exhaust gas and mixes it with oxygen to adjust the pressure of the gas supplied to the gas. The method of claim 15, The combustion means 20 is a waste incineration apparatus to recycle the incinerator exhaust gas is mixed and applied to the incinerator exhaust, characterized in that a plurality of stepped in the bottom of the first combustion chamber (11). The method of claim 12, The supply pipes 101 (101a to 101e) and the oxygen supply pipes (121a to 121d) have control dampers (115a to 115j) and oxygen supply control valves (124a to 124d) at predetermined positions to control the amount of opening and closing of the inner passage. A waste incineration apparatus, in which an incinerator exhaust gas is recycled and mixed and applied with oxygen. The method of claim 9, A dryer 30 is further installed on the lower sidewall of the input hopper 13 so as to quickly dry the waste, and the dryer 30 is installed on the side wall of the input hopper 13 to receive the recycle gas. Incinerator exhaust characterized in that it consists of a gas supply pressure chamber 31 to which the supply pipe 101e is connected, and a drying nozzle 32 coupled to one side of the gas supply pressure chamber 31 for injecting recycle gas to the waste side. Waste incinerator which recycles gas and mixes it with oxygen. The method of claim 17, In the supply pipe 101 at the point where the recycle gas and the air are mixed, a sensor 130 is installed to detect the gas amount, temperature, and gaseous oxygen amount of the recycle gas in which air is selectively mixed, and from the sensor 130 The central control panel 150 which receives the data recycles the waste gas mixed with oxygen by recycling the incinerator exhaust gas, characterized in that the respective control dampers 115a to 115j and the oxygen supply control valves 124a to 124d are controlled by data signals. Incinerator. The method of claim 9, When the amount of recycled gas that has passed through the bag filter 70 exceeds the amount of gas to be applied for combustion, the pipe 5d is branched at the start of the supply pipe 101 so as to discharge the excess recycled gas to the outside after purification. A catalyst deodorization tower 80 connected / installed to purify recycle gas, and one side of the catalyst deodorization tower 80 connected to a pipe 5e, and clean gas purified from the catalyst deodorization tower 80 to the outside. The waste incineration apparatus, which recycles the incinerator exhaust gas and mixes and applies the oxygen, further comprising a stack 90 for discharging.

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