WO2010053223A1

WO2010053223A1 - Waste incinerator and cogeneration system using the same

Info

Publication number: WO2010053223A1
Application number: PCT/KR2008/006774
Authority: WO
Inventors: Young Ho Kim
Original assignee: Young Ho Kim
Priority date: 2008-11-10
Filing date: 2008-11-18
Publication date: 2010-05-14
Also published as: KR20100051949A; KR101142953B1

Abstract

Provided are a waste incinerator and a cogeneration system using the same that are capable of smoothly incinerating various incinerable municipal and industrial wastes, and producing electric power and providing heating and warm water using heat generated during incineration of the wastes. The waste incinerator includes: a housing having a structure in which a triple iron plate is constituted by an inner wall, an intermediate wall and an outer wall to define an incineration chamber having a certain volume by surrounding side and upper parts of the incineration chamber, the upper part has a waste input port, and an empty space between the inner wall and the intermediate wall is filled with water to be used as heating water; a heating chamber installed under the incineration chamber to provide a certain volume and configured to heat the bottom of the incineration chamber using a burner installed at one side thereof to maintain the temperature in the incineration chamber at a predetermined level; an exhaust gas discharge port having a lower end vertically installed at a center part of the incineration chamber to be connected to the heating chamber, and a lower section in communication with a center lower part of the in¬ cineration chamber to guide discharge of a combustion gas generated in the incineration chamber and the heating chamber to the exterior; a steam generation chamber having a double-cylinder structure surrounding an outer periphery of the exhaust gas discharge port, and filled with water for receiving heat from the incineration chamber to generate steam; a first air supply means installed at an inner lower part of the incineration chamber and, and having an air supply pipe and a first blower installed at an outer end of the air supply pipe, wherein the air supply pipe has a plurality of small holes passing therethrough from the exterior of the housing toward the inner lower part of the incineration chamber to supply air required for combustion of waste; a second air supply means having a plurality of air passages installed around the housing surrounding the incineration chamber to supply air required for combustion of waste and disposed between the inner wall and the intermediate wall at predetermined intervals, and a second blower installed to forcedly supply air toward a space between the intermediate wall and the outer wall; a rotary rotatably installed to cross the incineration chamber to stir the waste input into the incineration chamber; an initial ignition burner installed at one side of the housing and initially igniting the waste input into the incineration chamber; and a residue discharge screw installed at the bottom of the incineration chamber to discharge ashes generated in the incineration chamber after in¬ cineration of the waste.

Description

WASTE INCINERATOR AND COGENERATION SYSTEM

USING THE SAME

Technical Field

[1] The present invention relates to a waste incinerator and a cogeneration system using the same, and more particularly, to a waste incinerator and a cogeneration system using the same that are capable of smoothly incinerating various incinerable municipal and industrial wastes, and producing electric power and providing heating and warm water using heat generated during incineration of the wastes. Background Art

[2] With rapid development of various industries, a large increase in various municipal and industrial wastes has became a huge social problem, and thus, methods and apparatus for processing municipal and industrial wastes have been continuously developed.

[3] For example, the applicant has filed Korean Patent Laid-open Publication No.

10-2004-111211, entitled Pyrolysis Apparatus having Screw Type Guidance System and Inner- Pipe Type Circulatory System of Combustion Heat, and Korean Patent Registration No. 10-777812, entitled Tunnel-type Apparatus for Recovering Pyrolysis Oil from Waste Plastics, and developed various apparatuses for processing wastes.

[4] In recent times, in order to prevent exhaustion of natural resources and contamination of environments, various efforts have been continuously performed to maximally recycle recyclable wastes and minimize environmental pollution during recycling of the wastes.

Disclosure of Invention Technical Problem

[5] Accordingly, the present invention has been made in an effort to solve the problems occurring in the related art, and an object of the present invention is to provide a waste incinerator and a cogeneration system using the same that are capable of smoothly incinerating various incinerable municipal and industrial wastes, and producing electric power and providing heating and warm water using heat generated during incineration of the wastes.

[6] In addition, it is another object of the present invention to provide a waste incinerator and a cogeneration system using the same that are capable of reducing the amount of an imperfectly combusted exhaust gas discharged during an incineration process of waste to reduce air pollution.

[7] Further, it is still another object of the present invention to provide a waste in- cinerator and a cogeneration system using the same that are capable of continuously incinerating wastes. Technical Solution

[8] In order to achieve the above objects, according to one aspect of the present invention, there is provided a waste incinerator including: a housing having a structure in which a triple iron plate is constituted by an inner wall, an intermediate wall and an outer wall to define an incineration chamber having a certain volume by surrounding side and upper parts of the incineration chamber, the upper part has a waste input port, and an empty space between the inner wall and the intermediate wall is filled with water to be used as heating water; a heating chamber installed under the incineration chamber to provide a certain volume and configured to heat the bottom of the incineration chamber using a burner installed at one side thereof to maintain the temperature in the incineration chamber at a predetermined level; an exhaust gas discharge port having a lower end vertically installed at a center part of the incineration chamber to be connected to the heating chamber, and a lower section in communication with a center lower part of the incineration chamber to guide discharge of a combustion gas generated in the incineration chamber and the heating chamber to the exterior; a steam generation chamber having a double-cylinder structure surrounding an outer periphery of the exhaust gas discharge port, and filled with water for receiving heat from the incineration chamber to generate steam; a first air supply means installed at an inner lower part of the incineration chamber and, and having an air supply pipe and a first blower installed at an outer end of the air supply pipe, wherein the air supply pipe has a plurality of small holes passing therethrough from the exterior of the housing toward the inner lower part of the incineration chamber to supply air required for combustion of waste; a second air supply means having a plurality of air passages installed around the housing surrounding the incineration chamber to supply air required for combustion of waste and disposed between the inner wall and the intermediate wall at predetermined intervals, and a second blower installed to forcedly supply air toward a space between the intermediate wall and the outer wall; a rotary rotatably installed to cross the incineration chamber to stir the waste input into the incineration chamber; an initial ignition burner installed at one side of the housing and initially igniting the waste input into the incineration chamber; and a residue discharge screw installed at the bottom of the incineration chamber to discharge ashes generated in the incineration chamber after incineration of the waste.

[9] In the incinerator, the incineration chamber may include a bottom surface inclined downward from a center to an outer circumference thereof, and the air supply pipe of the first air supply may be inclined along the inclination of the bottom surface of the incineration chamber.

[10] In the incinerator, a water level sensor may be installed at a center of a lower part of the steam generation chamber, and a water supply pipe may be installed to maintain a water level of the steam generation chamber at a certain level.

[11] According to another aspect of the present invention, there is provided a co- generation system including: a waste incinerator including a housing having a structure in which a triple iron plate is constituted by an inner wall, an intermediate wall and an outer wall to define an incineration chamber having a certain volume by surrounding side and upper parts of the incineration chamber, the upper part has a waste input port, and an empty space between the inner wall and the intermediate wall is filled with water to be used as heating water, a heating chamber installed under the incineration chamber to provide a certain volume and configured to heat the bottom of the incineration chamber using a burner installed at one side thereof to maintain the temperature in the incineration chamber at a predetermined level, an exhaust gas discharge port having a lower end vertically installed at a center part of the incineration chamber to be connected to the heating chamber, and a lower section in communication with a center lower part of the incineration chamber to guide discharge of a combustion gas generated in the incineration chamber and the heating chamber to the exterior, a steam generation chamber having a double-cylinder structure surrounding an outer periphery of the exhaust gas discharge port, and filled with water for receiving heat from the incineration chamber to generate steam, a first air supply means installed at an inner lower part of the incineration chamber and, and having an air supply pipe and a first blower installed at an outer end of the air supply pipe, wherein the air supply pipe has a plurality of small holes passing therethrough from the exterior of the housing toward the inner lower part of the incineration chamber to supply air required for combustion of waste, a second air supply means having a plurality of air passages installed around the housing surrounding the incineration chamber to supply air required for combustion of waste and disposed between the inner wall and the intermediate wall at predetermined intervals, and a second blower installed to forcedly supply air toward a space between the intermediate wall and the outer wall, a rotary rotatably installed to cross the incineration chamber to stir the waste input into the incineration chamber, an initial ignition burner installed at one side of the housing and initially igniting the waste input into the incineration chamber, and a residue discharge screw installed at the bottom of the incineration chamber to discharge ashes generated in the incineration chamber after incineration of the waste; a steam turbine driven by receiving steam generated from the steam generation chamber of the incinerator to generate electricity; and a heater for receiving the water filled and heated in the heating water chamber between the inner wall and the intermediate wall of the housing to heat a facility.

[12] The cogeneration system using an incinerator may further include: a residual gas separator for receiving a combustion gas discharged through an exhaust gas discharge port of the incinerator and supplying condensed water to decrease a temperature of the combustion gas so that oil contained in the combustion gas and particles including dust are collected by the condensed water and a portion of the combustion gas is separated into a separate line; a residual gas storage tank having a predetermined inner volume to separately store a residual gas separated in the residual gas separator; and a residual gas combustion furnace formed of a high strength heat-resistance concrete material and having a vertical cylindrical structure for receiving the residual gas in the residual gas storage tank to completely combust the residual gas.

[13] In the cogeneration system using an incinerator, a water heating pipe may be installed around a main wall of the residual gas combustion furnace to heat water using heat generated upon combustion of the residual gas.

[14] In the cogeneration system using an incinerator, a portion of warm water heated by the water heating pipe may be supplied into the heating water chamber.

Advantageous Effects

[15] According to a waste incinerator of the present invention, it is possible to continuously and completely incinerate various incinerable municipal and industrial wastes, provide power generation, heating, and warm water using heat generated during incineration of the wastes, and effectively use energy generated during the incineration.

[16] In addition, according to the waste incinerator of the present invention, it is possible to combust a waste using initial ignition in a state in which only the waste is input into an incineration chamber, without providing additional ignition fire.

[17] Further, according to a cogeneration system using a waste incinerator, particles contained in a combustion gas generated during incineration of the waste can be separated and a residual gas can be combusted again to minimize air pollution. Brief Description of Drawings

[18] The above and other objects, features and advantages of the present invention will be more apparent from the following detailed description taken in conjunction with the accompanying drawings, in which:

[19] FIG. 1 is a side cross-sectional view of a waste incinerator in accordance with an exemplary embodiment of the present invention;

[20] FIG. 2 is a front cross-sectional view of the waste incinerator in accordance with an exemplary embodiment of the present invention;

[21] FIG. 3 is a plan cross-sectional view of the waste incinerator in accordance with an exemplary embodiment of the present invention;

[22] FIG. 4 shows an operation state of the waste incinerator in accordance with an exemplary embodiment of the present invention;

[23] FIG. 5 shows the constitution of a cogeneration system to which the waste incinerator in accordance with an exemplary embodiment of the present invention is applied; and

[24] FIG. 6 shows an operation state of the cogeneration system to which the waste incinerator in accordance with an exemplary embodiment of the present invention is applied.

[25] * Description of Major Reference Numerals *

[26] 100: Waste incinerator 102: Incineration chamber

[27] 104: Waste input port 110: Housing

[28] 112: Inner wall 114: Intermediate wall

[29] 116: Outer wall 118: Warm water chamber

[30] 120: Heating chamber

[31] 122: Incineration chamber bottom

[32] 130: Combustion heat discharge port

[33] 140: Steam generation chamber

[34] 150: First air supply means 154: Air supply pipe

[35] 160: Second air supply means 164: Air supply chamber

[36] 166: Air passage 170: Rotary

[37] 180: Burner for initial ignition

[38] 190: Residue discharge screw

[39] 200: Cogeneration apparatus 210: Steam turbine

[40] 220: Heater

[41] 230: Residual gas separator

[42] 232: Condensed water shower apparatus

[43] 236: Condensed water collecting tank

[44] 240: Residual gas storage tank

[45] 250: Residual gas combustion furnace

Mode for the Invention

[46] Constitutions and operations of a waste incinerator and a cogeneration system using the same in accordance with exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[47] FIG. 1 is a side cross-sectional view of a waste incinerator in accordance with an exemplary embodiment of the present invention, FIG. 2 is a front cross-sectional view of the waste incinerator in accordance with an exemplary embodiment of the present invention, FIG. 3 is a plan cross-sectional view of the waste incinerator in accordance with an exemplary embodiment of the present invention, FIG. 4 shows an operation state of the waste incinerator in accordance with an exemplary embodiment of the present invention, FIG. 5 shows the constitution of a cogeneration system to which the waste incinerator in accordance with an exemplary embodiment of the present invention is applied, and FIG. 6 shows an operation state of the cogeneration system to which the waste incinerator in accordance with an exemplary embodiment of the present invention is applied.

[48] In the drawings, reference numeral 100 designates a waste incinerator in accordance with an exemplary embodiment of the present invention, and reference numeral 200 designates a cogeneration system including the waste incinerator in accordance with an exemplary embodiment of the present invention.

[49] The waste incinerator 100 shown in FIGS. 1 to 3 is configured to incinerate various incinerable municipal and industrial wastes, and includes a housing 110 configured to provide an incineration chamber 102 having a predetermined inner volume, a heating chamber 120 with a predetermined volume installed under the incineration chamber 102 to maintain the temperature in the incineration chamber 102 at a predetermined level and configured to heat a bottom of the incineration chamber 102 by operating a burner 124 installed at one side thereof, a combustion gas discharge port 130 installed to guide a combustion gas generated in the incineration chamber 102 and the heating chamber 120 to the exterior, a steam generation chamber 140 installed to surround an outer periphery of the combustion gas discharge port 130, a first air supply means 150 installed to provide air required to combust wastes into an inner lower part of the incineration chamber 102, a second air supply means 160 installed around an outer periphery of the incineration chamber 102 to supply air required to combust wastes, rotaries 170 installed to pass through the incineration chamber 102 so that the wastes input into the incineration chamber 102 can be smoothly combusted, an initial ignition burner 180 installed to ignite the wastes input into the incineration chamber 102, and a residue discharge screw 190 installed at a lower part of the incineration chamber 102 to discharge residues such as ashes after combustion of the wastes input into the incineration chamber 102 to the exterior.

[50] The housing 110 in accordance with the present invention has a triple iron plate structure constituted by an inner wall 112, an intermediate wall 114 and an outer wall 116 to surround upper and side surfaces, when seen from a cross-sectional view. Here, the inner wall 112, the intermediate wall 114 and the outer wall 116 are spaced apart predetermined intervals from each other. In particular, air passages 166 constituted by a plurality of small pipes are installed between the inner wall 112 and the intermediate wall 114 to make an air supply chamber 164 disposed between the intermediate wall 114 and the outer wall 116 in communication with the incineration chamber 102. That is, small holes are formed in the inner wall 112 and the intermediate wall to correspond to each other at predetermined intervals, and both ends of the air passages 166 are fixed between the small holes such that the combustion chamber 102 is in communication with the space between the intermediate wall 114 and the outer wall 116 through the air passage 166.

[51] Meanwhile, the space between the inner wall 112 and the intermediate wall 114 is isolated from the combustion chamber 102 and the space between the intermediate wall 114 and the outer wall 116. The space between the inner wall 112 and the intermediate wall 114 is used as a heating water chamber 118 filled with water to provide warm water and heating water.

[52] A waste input port 104 is installed at an upper part of the housing 110 as constituted above to input incinerable wastes into the incineration chamber 102. The waste input port 104 may have a structure through which wastes can be continuously input or in which opened and closed states thereof can be alternately and periodically changed by a separate apparatus. In addition, in order to prevent heating power in the incineration chamber 102 from being transmitted to the exterior through the waste input port 104, additional components may be installed around the waste input port 104.

[53] Meanwhile, in order to maintain the temperature in the incineration chamber 102 at a predetermined level or more, the heating chamber 120 is provided under the incineration chamber 102. As shown in the drawings, the incineration chamber 102 and the heating chamber 120 are partitioned by an incineration chamber bottom 122. A burner 124 is installed at one side of the heating chamber 120 to heat the incineration chamber bottom 122.

[54] In addition, the combustion gas discharge port 130 is installed to vertically cross a center part of the incineration chamber 102 to discharge combustion gases generated in the incineration chamber 102 and the heating chamber 120 to the exterior. That is, a lower end of the combustion gas discharge port 130 is installed to be in communication with an upper part of the heating chamber 120, and an upper end of the combustion gas discharge port 130 is installed to be exposed toward the upper part of the housing 110. Of course, a center lower section of the combustion gas discharge port 130 is in communication with the incineration chamber 102 such that a combustion gas generated in the incineration chamber 102 is guided through the combustion gas discharge port 130. For this purpose, a combustion gas guide pipe 132 is radially installed at a center section of the combustion gas discharge port 130 to cross the steam generation chamber 140 such that the incineration chamber 102 is in communication with the combustion gas discharge port 130.

[55] In particular, the steam generation chamber 140 having a double-cylinder structure is installed at an outer periphery of the combustion gas discharge port 130. As shown, the steam generation chamber 140 is configured to surround the combustion gas discharge port 130 from its lower part to its upper part, in which a certain level of water is stored. The water stored in the steam generation chamber 140 is heated by the heat generated during waste incineration in the incineration chamber 102 to be evaporated. Of course, a water level sensor 142 may be provided at one side of a lower center part of the steam generation chamber 140. In addition, a separate water supply pipe may be installed to maintain water at a certain level by measuring variation in level of the water using the water level sensor 142.

[56] In the waste incinerator 100 in accordance with the present invention, in order to more smoothly combust the waste input into the incineration chamber 102 during the waste incineration, the first air supply means 150 is provided at a lower side in the incineration chamber 102 to sufficiently supply air required for combustion thereinto. As shown, the first air supply means 150 includes air supply pipes 154 installed along an outer side surface of the housing 110 toward the inner lower part of the incineration chamber 102 and having air injection nozzles 154a having small holes formed at its outer periphery, and first blowers 152 for forcedly blowing air into the air supply pipes 154.

[57] In addition to the first air supply means 150, the second air supply means 160 is provided around the housing 110 surrounding the incineration chamber 102 to supply air required for waste combustion. As shown, the second air supply means 160 includes the plurality of air passages 166 formed between the inner wall 112 and the intermediate wall 114 of the housing 110 at predetermined intervals, the air supply chamber 164 disposed in a space between the intermediate wall 114 and the outer wall 116 of the housing 110, and a second blower 162 for forcedly blowing air into the air supply chamber 164.

[58] Further, the rotaries 170 are installed to cross the incineration chamber 102 to stir the waste input through the waste input port 104 so that the waste can be readily combusted. The rotaries 170 are rotated by a rotary driving motor 172 separately installed at the wall of the housing 110. The rotaries 170 may be integrally rotated by a single rotary driving motor 172, or may be alternately rotated by a plurality of rotary driving motors 172.

[59] As described above, since the initial ignition burner 180 is installed at a side surface of the housing 110 to initially ignite the waste input into the waste incinerator 100, there is no necessity of continuously operating the initial ignition burner 180 during the entire process of operating the waste incinerator 100 in accordance with the present invention. That is, in a state in which the waste initially input into the incineration chamber 102 is ignited, even when waste is continuously input through the waste input port 104, the waste can be continuously combusted by the heat in the incineration chamber 102 and heat transferred from the heating chamber 120.

[60] Meanwhile, as described above, the residue discharge screw 190 is installed at the incineration chamber bottom 122 to discharge residues such as ashes, etc., generated in the incineration chamber 102 after the waste combustion. The incineration chamber bottom 122 may be inclined to smoothly discharge the residues. That is, the incineration chamber bottom 122 is inclined from its center to its outer periphery.

[61] When the incineration chamber bottom 122 has an inclined structure as described above, the air supply pipes 154 of the air supply means 150 and the residue discharge screw 190 are also inclined along the inclined surface of the incineration chamber bottom 122.

[62] Meanwhile, as shown in FIGS. 2 and 3, a pair of combustion gas discharge ports 130 may be installed at the housing 110 of the waste incinerator 100 in accordance with the present invention. That is, the housing 110 has a larger length than a width thereof, and the pair of combustion gas discharge ports 130 are installed in the incineration chamber 102 at a predetermined interval. When the pair of combustion gas discharge ports 130 are installed in the housing 110, steam generation chambers 140 are installed around the combustion gas discharge ports 130, respectively. In addition, air supply pipes 154 of the first air supply means 150 are installed about the combustion gas discharge ports 130, respectively.

[63] The waste incinerator 100 in accordance with an exemplary embodiment of the present invention may be applied to a cogeneration system 200 as shown in FIGS. 5 and 6.

[64] That is, the cogeneration system 200 in accordance with an exemplary embodiment of the present invention includes the waste incinerator 100 as described above, a steam turbine 210 driven by receiving steam generated from the steam generation chamber 140 of the waste incinerator 100 to generate electricity, and a heater 220 for receiving water filled and heated in the heating water chamber 118 provided in a space between the inner wall 112 and the intermediate wall 114 of the housing 110 of the waste incinerator 100 to heat a facility such as a building, etc. Here, the steam turbine 210 and the heater 220 may employ conventional apparatuses, and thus detailed descriptions thereof will be omitted.

[65] In addition, the cogeneration system 200 in accordance with an exemplary embodiment of the present invention may further include a residual gas separator 230 receiving a combustion gas discharged through the combustion gas discharge port 130 of the waste incinerator 100, supplying condensed water to decrease the temperature of the combustion gas and simultaneously collecting particles such as oil and dust contained in the combustion gas using the condensed water, and separating some of the residual gas existing in the combustion gas into a separate line, a residual gas storage tank 240 spaced apart from the residual gas separator 230 and having a predetermined inner volume such that the residual gas separated by the residual gas separator 230 is separately stored, and a residual gas combustion furnace 250 having a vertical cylindrical structure formed of a high strength heat-resistance concrete material and receiving the residual gas in the residual gas storage tank 240 to perform perfect combustion.

[66] A condensed water shower apparatus 232 is installed at an inner upper part of the residual gas separator 230 to supply condensed water into the residual gas separator 230. In addition, a residual gas discharge port 234a is installed at a side surface of a center part of the residual gas separator 230 to discharge residual gases which is not captured by the condensed water. Further, a condensed water discharge port 234b is formed at a lower part of the residual gas separator 230 to discharge the captured material together with the condensed water. Furthermore, a condensed water collecting tank 236 is installed under the condensed water discharge port 234b to receive the condensed water discharged through the condensed water discharge port 234b. Particles such as oil, dust, etc., contained in the condensed water may form layers in the condensed water collecting tank 236 depending on their specific gravities or settle to the bottom thereof such that an operator can readily separate them. The water, among the condensed water collected in the condensed water collecting tank 236, is supplied again into the condensed water shower apparatus 232 through a separate condensed water circulation pump 238.

[67] In addition, as shown, a water heating pipe 260 having a coil shape may be installed around a main wall of the residual gas combustion furnace 250 to heat water using the heat generated during combustion of the residual gas. The warm water heated by the water heating pipe 260 may be directly used as warm water for domestic use, or may be supplied into the heating water chamber 118 as shown.

[68] Meanwhile, an exhaust gas generated from the residual gas combustion furnace 250 during combustion of the residual gas is discharged to the air through a gas discharge line 270, which is separately installed. The gas discharge line 270 may be configured to join the exhaust gas discharged from the residual gas combustion furnaces 250 installed at both sides thereof, and then simultaneously discharge the exhaust gas.

[69] Hereinafter, operations of the waste incinerator 100 and the cogeneration system 200 using the same in accordance with an exemplary embodiment of the present invention will be described in brief with reference to FIGS. 4 and 6.

[70] First, incinerable wastes are input through the waste input port 104 installed at an upper part of the housing 110 of the waste incinerator 100 of the present invention. When the waste incinerator 100 is initially operated, the initial ignition burner 180 is operated to initially ignite the incinerable wastes in the incineration chamber 102.

[71] In addition, the heating chamber 120 installed under the incineration chamber 102 includes the burner 124 for providing fire to maintain the temperature of the incineration chamber 102 at a certain level.

[72] Further, the first air supply means 150 installed to supply air toward an inner lower part of the incineration chamber 102 and the second air supply means 160 installed to supply air from the exterior of the incineration chamber 102 are operated to sufficiently supply air required for combustion of the wastes into the incineration chamber 102. As the rotaries 170 installed in the incineration chamber 102 are rotated, the wastes input through the waste input port 104 are stirred. Therefore, a sufficient amount of air can be supplied into the incineration chamber 102 to increase combustion efficiency.

[73] As the wastes are incinerated in the incineration chamber 102 as described above, a generated combustion gas is discharged through the combustion gas discharge port 130 and then moved toward the residual gas separator 230.

[74] In particular, water filled in the steam generation chamber 140 is boiled by a large amount of heat generated in the incineration chamber 102 during the waste incineration to generate steam, and the steam is provided toward the steam turbine 210. The steam turbine 210 generates electricity using the steam power. As the steam is generated in the steam generation chamber 140, the level of the water filled in the steam generation chamber 140 is gradually lowered. When the water level is lowered to a certain level or less, the water level sensor 142 detects the water level to refill water.

[75] In addition, the water filled in the heating water chamber 118 provided between the inner wall 112 and the intermediate wall 114 of the housing 100 is heated by the heat generated in the incineration chamber 102 during the waste incineration, and the heated water is supplied to the heater 220 separately provided at the exterior of the waste incinerator 100 to be used for heating a building.

[76] Residues such as ashes generated in the incineration chamber 102 after the waste incineration are discharged to the exterior through the residue discharge screw 190 installed under the incineration chamber 102.

[77] In addition, the combustion gas discharged through the combustion gas discharge port 130 passes through the residual gas separator 230 so that particles such as oil and dust are captured by the condensed water and the other residual gas is stored in the residual gas storage tank 240, which is separately provided. The residual gas stored in the residual gas storage tank 240 is combusted as the residual gas combustion furnace 250 is driven. Here, when the water heating pipe 260 is installed around the main wall of the residual gas combustion furnace 250, water passing through the water heating pipe 260 is heated by the heat generated during combustion of the residual gas. [78] Meanwhile, foreign substances such as oil or dust captured by the condensed water while passing through the residual gas separator 230 can be layered in the condensed water collecting tank 236 due to differences in specific gravity or can settle to the bottom thereof to be readily separated.

[79] As can be seen from the foregoing, the waste incinerator 100 and the cogeneration system 200 using the same in accordance with an exemplary embodiment of the present invention can effectively incinerate collected wastes, and enable power generation, heating of a building, and use of warm water using heat energy generated during the waste incineration. In addition, after separating pollution materials contained in the combustion gas generated during the waste incineration, the residual gas having no particles such as oil or dust can be perfectly combusted and then discharged to the air to reduce air pollution.

[80] While few exemplary embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes may be made to these embodiments without departing from the spirit and scope of the invention as defined by the appended claims and their equivalents.

[81]

Claims

[1] A waste incinerator comprising: a housing having a structure in which a triple iron plate is constituted by an inner wall, an intermediate wall and an outer wall to define an incineration chamber having a certain volume by surrounding side and upper parts of the incineration chamber, the upper part has a waste input port, and an empty space between the inner wall and the intermediate wall is filled with water to be used as heating water; a heating chamber installed under the incineration chamber to provide a certain volume and configured to heat the bottom of the incineration chamber using a burner installed at one side thereof to maintain the temperature in the incineration chamber at a predetermined level; an exhaust gas discharge port having a lower end vertically installed at a center part of the incineration chamber to be connected to the heating chamber, and a lower section in communication with a center lower part of the incineration chamber to guide discharge of a combustion gas generated in the incineration chamber and the heating chamber to the exterior; a steam generation chamber having a double-cylinder structure surrounding an outer periphery of the exhaust gas discharge port, and filled with water for receiving heat from the incineration chamber to generate steam; a first air supply means installed at an inner lower part of the incineration chamber and, and having an air supply pipe and a first blower installed at an outer end of the air supply pipe, wherein the air supply pipe has a plurality of small holes passing therethrough from the exterior of the housing toward the inner lower part of the incineration chamber to supply air required for combustion of waste; a second air supply means having a plurality of air passages installed around the housing surrounding the incineration chamber to supply air required for combustion of waste and disposed between the inner wall and the intermediate wall at predetermined intervals, and a second blower installed to forcedly supply air toward a space between the intermediate wall and the outer wall; a rotary rotatably installed to cross the incineration chamber to stir the waste input into the incineration chamber; an initial ignition burner installed at one side of the housing and initially igniting the waste input into the incineration chamber; and a residue discharge screw installed at the bottom of the incineration chamber to discharge ashes generated in the incineration chamber after incineration of the waste.

[2] The waste incinerator according to claim 1, wherein the incineration chamber comprises a bottom surface inclined downward from a center to an outer circumference thereof, and the air supply pipe of the first air supply is inclined along the inclination of the bottom surface of the incineration chamber.

[3] The waste incinerator according to claim 1 or 2, wherein a water level sensor is installed at a center of a lower part of the steam generation chamber, and a water supply pipe is installed to maintain a water level of the steam generation chamber at a certain level.

[4] A cogeneration system comprising: a waste incinerator according to claim 1 ; a steam turbine driven by receiving steam generated from a steam generation chamber of the incinerator to generate electricity; and a heater for receiving the water filled and heated in a heating water chamber disposed between an inner wall and an intermediate wall of a housing to heat a facility.

[5] The cogeneration system according to claim 4, further comprising: a residual gas separator for receiving a combustion gas discharged through an exhaust gas discharge port of the incinerator and supplying condensed water to decrease a temperature of the combustion gas so that oil contained in the combustion gas and particles including dust are collected by the condensed water and a portion of the combustion gas is separated into a separate line; a residual gas storage tank having a predetermined inner volume to separately store a residual gas separated in the residual gas separator; and a residual gas combustion furnace formed of a high strength heat-resistance concrete material and having a vertical cylindrical structure for receiving the residual gas in the residual gas storage tank to completely combust the residual gas.

[6] The cogeneration system according to claim 5, wherein a water heating pipe is installed around a main wall of the residual gas combustion furnace to heat water using heat generated upon combustion of the residual gas.

[7] The cogeneration system according to claim 6, wherein a portion of warm water heated by the water heating pipe may be supplied into a warm water chamber.