JP2001330222A - Rotating after-burning cylinder incinerator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an incinerator of a fixed fire grate type, which incinerates incineration processing objects containing hazardous substance producing the reduced amount of incineration residue and, of which thermal decomposition holding time is satisfactory for the decomposition of waste gas and cost of construction, and check and maintenance is low. SOLUTION: The length of an after-burning furnace or a thermal decomposition duct can be reduced or the height of a funnel 28 can the lowered by installing a rotating after-burning cylinder 14 inside fin rotating system, of which inside duct pressure loss of waste gas flow is uniform and, which is compact and less in heat radiation on the downstream side of the incinerating furnace 18. The problem of the shortage of the holding time of waste gas 22 for decomposing the waste gas 22 containing hazardous substance can be solved, and the efficiency of the thermal decomposition can be more stabilized by the controlled operation using a combustion controller. The quantity of polluting or hazardous substance such as smoke and soot, dioxin discharged into the air from the funnel not only limited to regular operation but direct after the start of incineration process or during the tens of seconds after the stop of the operation can be drastically reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the incineration of industrial waste and general refuse waste, which reduces the amount of incineration residues and burns and decomposes highly toxic harmful gases, thereby effectively reducing the release of harmful substances to the atmosphere. The present invention relates to a reduced grate incinerator, and more particularly to a post-swirl combustion tube incinerator.

[0002]

2. Description of the Related Art A post-swirling cylinder incinerator having a shape as in the present invention in which a spiral flow path is formed in a post-combustion zone of a waste incinerator to transfer or heat-transfer an internal fluid is known as a conventional technique. not exist. Until now, the thermal decomposition time in the combustion waste gas has not been regarded as important, and the technology regarding the method for shortening the combustion time of the incinerated product has been given priority.

However, taking dioxins in waste gas from an incinerator, which is a social problem, as an example, their production is performed unintentionally in the process of burning an organic compound under conditions in which chlorine coexists. In order to suppress the emission of dioxins, it is necessary to break down the bond between carbon and chlorine in the organic chlorine compound in the waste gas and thermally decompose carbon to carbon dioxide and chlorine to chlorine ions. For this reason, it is considered desirable that the pyrolysis temperature in the incinerator is 850 ° C or more and the residence time is 2 seconds. However, small fixed grate incinerators place importance on the removal of dust and SOx in the exhaust gas as pollutants. However, many incinerators do not take into account the thermal decomposition of dioxins just by considering the method of self-combustion, the management of combustion temperature, and the effective use of thermal energy. At present, these incinerators are unstable in incineration temperature and pyrolysis time. High-temperature incineration treatment of inflammable hydrogen sulphide-containing compounds has been studied, and research has been conducted on high-temperature incineration methods for inflammable hydrogen chloride-containing compounds. It is not widely used due to the high cost, operation cost, and maintenance and inspection cost.

[0004] In a small fixed grate incinerator that does not forcibly suck exhaust gas, combustion occurs rapidly for several tens of seconds immediately after the start of the incineration process in a state where the temperature in the furnace and the temperature of the waste gas have not risen. To start, the pressure inside the incinerator increases, and many unburned treated materials (incineration residues) remain while the treated material remains incompletely burned.
And dust is released to the atmosphere from a chimney or the like. Also,
For several tens of seconds before the operation is stopped, the in-furnace temperature and the temperature of the waste gas decrease because there are few incineration products, so that the waste gas is released to the atmosphere from the chimney with incomplete thermal decomposition. In incinerators where the thermal decomposition time is insufficient, the total chlorine content in the treated material is limited, and the waste is combusted with the treated material with a low moisture content of combustible waste, and the amount treated per hour and the amount of auxiliary combustion In consideration of the above, an operation plan in which the in-furnace combustion temperature is increased to perform incineration treatment is adopted.

[0005]

Therefore, with a structure in which the thermal decomposition time of waste gas is extended at a stable combustion temperature, operation control during sudden excessive combustion at the start of incineration processing is possible, and several tens of In seconds, a waste incinerator capable of maintaining the waste gas temperature and securing the pyrolysis time is required. However, in the conventional concept of an incinerator with a post-combustion furnace, it is necessary to make the post-combustion zone thick and long so as to reduce the amount of heat dissipated from the outer wall surface in order to secure the pyrolysis time. In a small incinerator without an exhaust fan, the suction power of the chimney is limited, so it is necessary to reduce the pressure loss of the internal waste gas fluid. An incinerator that satisfies the above performance and requires low construction, operation, and maintenance costs is required.

[0006]

First, in order to secure the pyrolysis time of waste gas at a stable combustion temperature, it is necessary to make the post-combustion zone thick and long so that the heat dissipation from the outer wall surface is small. Therefore, the airflow characteristics of hot air and the required length of thermal decomposition will be described with reference to the accompanying drawings. FIG. 5 is a diagram showing the state of the flow of waste gas in an existing incinerator with a post-burning furnace. As shown, the post-combustion tube 14 attached to the waste gas outlet of the incinerator 18 is connected to a chimney 28. First, the airflow characteristics will be described. Since the frictional resistance is generated on the inner surface of the wall of the post-combustion cylinder 14 and the chimney 28, the airflow tends to gather at the center. The post-burning burner 15 is heated so that the burner heat is more entangled with the waste gas 22.
Even if the waste gas 22 is swirled by being mounted at an eccentric position, the centrifugal force does not work because the air flow itself has a low specific gravity, and the waste gas tends to gather at the center and becomes a laminar flow.
Since the waste gas is hot air, the waste gas is more likely to collect at the center where the temperature is higher than the side wall where the temperature is low, and the actual cross-sectional area of the flow path of the negative pressure gas 30 is smaller than the apparent internal cross-sectional area at the inner diameter D1 of the chimney 28. Further, the waste gas 22 from the incinerator 18 is swirled by the swirling hot air from the post-burner 15 when passing through the post-combustion cylinder 14 after the inner area is enlarged, and the central portion is in a vacuum state to increase the flow rate. That is, a part of the waste gas 22 passes through the post-combustion cylinder 14 without being heated by the incinerator 18, and the swirling flow 26 hot air later becomes a spiral flow and merges with the negative pressure gas 30 in the center. Occur. The problem with the above method is that the waste gas flows in from the upstream side of the shaft center of the post-combustion furnace 14 and passes straight through the downstream side of the shaft center. A phenomenon in which no gas flows occurs at 32, and the waste gas stream produces a vacuum-like air stream like a tornado without apparently staying in contact with the length L2. Next, the length of the duct required for pyrolysis will be described. In the incinerator with a processing capacity of 1000 kg / h, which is equipped with the post-combustion cylinder 14 and the chimney 28 having the same shape as this figure, the waste gas at an average gas temperature of 800 ° C. Dry combustion gas volume is 67
When it is 300 m ^{3 /} h, the required thermal decomposition length: when the residence time in the furnace is reduced from Lo by 1 second to require 1 second in the post-combustion cylinder 14 and the chimney 28, the gas flow rate is 15 m / sec. Inner diameter D1
Required length of the chimney 28 and the post-combustion cylinder 14 having a diameter of 1.26 m and an outer diameter D2 of 1.56 m: L1 requires 15 m,
The calculated surface area length: L2 is 15.2 m, the surface area is 76 m ²゛, and the heat dissipation is 45710 kcal / h. However, at present, many chimneys have an incinerator with a chimney inner diameter D1 of 0.8 m and a height of about 10 m. Therefore, a post-burning furnace for securing the residence time is required.In order to prolong the residence time in the post-combustion furnace, means for providing a smooth swirling flow and obstacles for stopping the vacuum zone of the gas flow are provided. Has come to adopt the means for fixing.

The present invention basically provides an incinerator, wherein the incinerator has a waste gas inlet and a waste gas outlet at both ends,
A cylindrical duct-shaped post-combustion cylinder main body on which a refractory heat insulating material is installed on the inner surface, and a fixed shaft provided along the axis of the post-combustion cylinder,
An inner fin swirling type pyrolysis cylinder having a disk-shaped spiral swirling blade forming a spiral flow path of waste gas around the fixed axis in the post-combustion cylinder is integrated with the downstream side of the incinerator primary combustion zone. By mounting, the problem of prolonging the thermal decomposition residence time was solved.

The results will be described with reference to FIG. 6 regarding the airflow characteristics of hot air and the required length of thermal decomposition, which are important factors related to the post-combustion cylinder of the present invention. FIG. 6 is a diagram showing the state of the flow of waste gas in the post-swirl combustion cylinder incinerator according to the present invention. As shown, the post-combustion cylinder 1 of the incinerator 18
Reference numeral 4 denotes a fixed shaft 4 and a swirling blade 5 as means for securing the time for thermal decomposition of the waste gas 22 downstream of the primary combustion zone 23.
Having. Thereby, the waste gas becomes a swirling flow. Preferably, a post-combustion burner 15 for increasing the diameter of the post-combustion cylinder 14 for heating is mounted at a position eccentric along the spiral flow path so that the waste gas 22 swirls. The hot air of the waste gas 22 is turned into the hot air of the swirling flow 26 by the fixed shaft 4 for preventing generation of the central vacuum portion of the swirling flow and the swirling blade 5 forming the spiral waste gas flow path. Flows into. Since the post-combustion cylinder 14 has few upstream gas stagnation portions 31 and downstream gas stagnation portions 32, the post-combustion cylinder 14 has an inner diameter D
1 is 2.44 m, the dry combustion gas amount is 67300 m
^{When 3 /} h is divided by 4.674 m2 of inner area and 3600 seconds, the equivalent gas velocity is 4.0 m / sec (the actual average velocity is 12 m / sec when the number of swirling blades 5 is 3). Combustion cylinder 1
4 Required equivalent length when the outer diameter D2 is 2.74 m: L
1 requires 4 m, and the calculated surface area length: L2 is 4.6 m
The surface area is 55 m2 even if the area of both ends of the post-combustion cylinder is added, and the amount of heat dissipated is 32850 kcal / h.
The amount of heat dissipated from the surface of the post-combustion furnace and the chimney of the existing incinerator with the post-combustion cylinder is reduced to 72% of 45710 kcal / h. Therefore, the amount of heat dissipated from the outer wall surface of the post-combustion zone located downstream of the primary combustion zone is small, and the pressure loss in the pipe of the waste gas fluid does not change. The swirl combustion cylinder having the disk-shaped spiral swirl vanes is integrally mounted on the downstream side of the incinerator.

Next, means for solving the problems at the start of the incineration process and for several tens of seconds before stopping the operation will be described with reference to FIG. FIG. 3 is a cross-sectional view showing the configuration of one embodiment of the post-swirl combustion cylinder of the post-swirl combustion cylinder incinerator according to the present invention. As shown, the post-combustion cylinder 14 of the incinerator 18 has a primary combustion zone 23.
Installed downstream. It operates with a compact control panel equipped with a combustion controller to stabilize pyrolysis. First, at the start of the operation, the post-combustion zone 25 and the post-combustion cylinder 14 are heated by the post-combustion burner 15 in order to bring the primary combustion zone 23 into a negative pressure state, and the suction pressure of the primary combustion zone 23 is increased to improve the negative pressure. The combustion controller 17 is set in a combustion ready state, and the measurement values of the suction pressure sensor 7 upstream of the post-combustion zone 25 and the secondary gas temperature sensor 8 downstream of the post-combustion cylinder 14 are received by the combustion controller 17, and the opening degree is adjusted by the exhaust gas air volume adjustment damper 9. After the control, a control circuit for igniting the ignition burner 21 is assembled. When the incineration of the treated material 20 starts and the temperature of the primary waste gas in the primary combustion zone 23 rises to 870 ° C. or higher, the post-burning burner 15
And a control circuit for stabilizing the value of the waste gas suction pressure sensor 7 attached downstream of the primary combustion zone 23 and keeping the speed of the waste gas 22 constant. In addition, since there is little incineration in the tens of seconds before the operation is stopped, the temperature in the furnace of the primary combustion zone 23 decreases, and the waste gas 22 is released to the atmosphere from the chimney 28 while the pyrolysis temperature is low. Therefore, a control circuit for increasing the amount of combustion of the post-burning burner 15, incinerating unburned residues, and ensuring the thermal decomposition temperature is assembled. In order to reduce a calculation error of the combustion controller 17 due to a measurement time difference of each sensor due to a sudden change in temperature between the start of operation and the stop of operation, and to further stabilize the waste gas temperature of the post-combustion cylinder 14, A heat storage material 16 made of a refractory and heat-insulating material is filled inside the swirl vanes 5 on the inner surface. The heat storage material 16 absorbs waste gas heat when the temperature rises excessively during the peak period of the incineration treatment, and discharges the heat when the waste gas temperature in the primary combustion zone 23 drops for several tens of seconds before the operation is stopped.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In addition, an upstream of the inner fin swirling type after-combustion cylinder, which is attached to the incinerator and has a fixed shaft and a disk-shaped spiral swirling blade forming a spiral flow path of waste gas. By providing a positive pressure post-burning burner along the spiral flow path at the side end, it is possible to heat the combustion of the unburned processed product and the waste gas. A post-burning burner is mounted in a tangential direction of the post-combustion cylinder jacket, the waste gas inlet has an opening at the upstream base end of the spiral flow path, and the waste gas outlet is in a tangential direction of the post-combustion cylinder jacket. By providing an opening at the downstream base end of the waste gas, a swirling flow can be given to the waste gas more effectively.

A swirl vane is attached to the fixed shaft suspended from an upper part of the upper end plate in the post-combustion cylinder. By making the fixed shaft hollow, a cooling fluid passes through the inside of the fixed shaft to allow the fixed shaft to pass therethrough. Temperature to secure the strength of the fixed shaft. Further, the heat energy absorbed by the internal fluid is supplied to a heat exchanger or the like, and the energy can be supplied to the residual heat utilization equipment via the heat exchanger.

By filling a solid ceramic material or a fibrous ceramic material as a heat storage material on the inner surface of the post-combustion cylinder forming the spiral flow path and outside the swirl vanes, the waste gas temperature in the primary combustion zone can be reduced. When the temperature rises sharply, the heat storage material absorbs the temperature, and when the temperature of the primary waste gas starts to decrease, the heat storage material emits heat in order to suppress a rapid decrease in the temperature of the waste gas, so that the thermal decomposition temperature can be stabilized.

At the start of operation, the suction pressure of the primary combustion zone is increased to make a good negative pressure combustion ready state, and abnormal combustion occurring for several tens of seconds immediately after the start of the incineration process and the unburned processed material remain incompletely burned. A control circuit to prevent pollutants such as dust from being released to the atmosphere from a chimney, etc., a control circuit to stabilize thermal decomposition in a steady state, The operation is performed on a compact control panel using the combustion controller incorporating a control circuit for preventing the gas temperature from lowering and stabilizing the waste gas decomposition temperature of the fluid inside the combustion cylinder after turning.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of an incinerator according to the present invention will be described below with reference to the drawings. FIG. 1 is a typical structural sectional view showing one embodiment of a post-swirl combustion cylinder incinerator according to the present invention,
FIG. 2 is a top view of FIG. 1 of the post-swirl combustion cylinder incinerator according to the present invention. As shown in the figure, after the disc-shaped spiral swirl vanes 5 forming a spiral flow path in the waste gas 22 are attached to the upper portion of the downstream of the primary combustion zone 23 of the incinerator 18, the combustion cylinder 14 is vertically arranged. At the end of the combustion zone 25, an integrated incinerator is provided with a post-combustion burner 15 having a positive pressure for burning the unburned processed material and heating the waste gas 22 along the spiral flow path. The waste gas inlet 10 has an opening at the upstream base end of the spiral flow passage, and the waste gas outlet 11 has an opening at the tangential downstream base end of the afterburning cylinder 14. The processed material 20 is
The incinerator 18 is put into the primary combustion zone 23 through the inlet 19, the ignition burner 21 is ignited, and the incineration process is started. The treated material 20 undergoes oxidative combustion and thermal decomposition to generate incinerated ash and waste gas 22, and the waste gas 22 passes through the ventilation holes of the refractory partition 24 in a state where the combustion decomposition continues, and the post-combustion zone 25.
And is heated by a post-burning burner 15, and flows into a post-combustion cylinder 14 provided with a disk-shaped spiral revolving blade 5 forming a spiral flow path of the waste gas 22 around the fixed shaft 4, 270
After the rotation, the exhaust gas 27, which has been pyrolyzed to reduce the content of pollutants, is discharged to the atmosphere from a chimney 28. Incinerator 1
8 controls the operation by a control panel equipped with a combustion controller 17 which incorporates a control circuit for preventing stable combustion during the processing operation and a decrease in the furnace temperature and the waste gas temperature for several tens of seconds before the operation is stopped. .

The operation control circuit of the incinerator 18 will now be described. First, in order to stabilize combustion at the start of the incineration operation, the primary combustion zone 23 is set to a negative pressure state.
For this purpose, the post-combustion zone 25 and the post-combustion cylinder 14 are heated by the post-combustion burner 15 to increase the suction pressure of the primary combustion zone 23 to make a good negative pressure combustion preparation state.
The measurement value signal of the secondary gas temperature sensor 8 downstream of the post-combustion cylinder 14 forming the spiral flow path with the upstream suction pressure sensor 7 was received by the combustion controller 17, and the opening was controlled by the gas air volume adjustment damper 9. Later, a control circuit for igniting the ignition burner 21 is assembled. Good incineration of the treated material 20 starts, and the temperature of the primary waste gas in the primary combustion zone 23 becomes 870.
When the temperature rises to a degree or more, the combustion amount of the post-burning burner 15 in the post-combustion zone 25 is reduced, the value of the gas suction pressure sensor 7 attached downstream of the primary combustion zone 23 is stabilized, and the speed of the waste gas 22 is kept constant. Set up a control circuit to make
After the steady operation, the primary combustion zone 23
The signal value of the secondary gas temperature sensor 8 and the signal value of the waste gas suction pressure sensor 7 are recalculated by the combustion controller 17 in accordance with the waste gas temperature, and the fuel amount of the post combustion burner 15 is controlled. An operation panel in which the operation control operation is programmed in the integrated circuit of the combustion controller 17 is used. Next, the operation control state for solving the unstable incineration process for several tens of seconds before the operation stop is described.The in-furnace temperature of the primary combustion zone 23 decreases because there is little incineration in the several tens of seconds before the operation stop, Since the waste gas 22 is released to the atmosphere from the chimney 28 while the thermal decomposition temperature is low, the amount of combustion of the post-burning burner 15 is increased, and the incineration of unburned residues and the thermal decomposition temperature are ensured. The control circuit is incorporated in the combustion controller 17.

Next, an embodiment of the post-swirl combustion cylinder 14 of the present invention will be described with reference to FIGS. 3 and 4. FIG. FIG. 3 is a cross-sectional view showing an embodiment of a post-swirl combustion tube of the post-swirl combustion tube incinerator according to the present invention, and FIG.
FIG. As shown in the figure, the inner fin swirling type post-combustion cylinder 14 in the form of a cylindrical duct made of a steel plate having the refractory heat insulating material 3 installed on the inner surface thereof is vertically disposed above the post-combustion zone 25 downstream of the incinerator 18 primary combustion zone 23. The waste gas inlet 10 has an opening at the upstream base end of the spiral flow path, and the waste gas outlet 11 has an opening at the tangential downstream base end of the afterburning cylinder 14. . The waste gas 22 flows into the post-combustion zone 25, is heated by the post-combustion burner 15, and
After rotating twice 90 degrees, the exhaust gas 27, which has been pyrolyzed to reduce the content of pollutants, is discharged from the chimney 28 to the atmosphere. Inside the post-combustion cylinder 14, two fixed shafts 4 made of a heat-resistant metal steel tube provided along the axis line are suspended from above the upper end plate 2 of the post-combustion cylinder 14. 14 project outside. The disk-shaped spiral revolving blade 5 made of a heat-resistant metal steel plate forming a spiral flow path of waste gas fixed around the fixed shaft 4 of the post-combustion cylinder 14 is, for example, a circumcircle of the two fixed shafts 4. The outer swirl vane extending spirally and the inside of the circumcircle of the two fixed shafts 4 are sealed with the number of divided segments 6, and waste gas is bypassed (short path) between spiral flow paths adjacent in the axial direction. Is configured not to occur. In this way, a spiral flow path for the waste gas inside the post-combustion cylinder 14 is formed.

A post-combustion burner 15 for burning the unburned processed material and heating the waste gas 22 is attached to the end of the post-combustion zone 25 on the side of the post-combustion zone 25 and blows out in the tangential direction of the jacket of the post-combustion cylinder 14. Has a mouth. The post-burning burner 15 heats the waste gas 22 along the spiral flow path and also imparts propulsion to the waste gas by directing the waste gas 22 in the flow direction of the waste gas. The waste gas inlet 10 has an opening at the upstream base end of the spiral flow path, and the waste gas outlet 11 opens at the downstream base end in the tangential direction of the post-combustion cylinder 14, and is directed toward the spiral flow path. It is arranged to be. By directing these inlets and outlets in specific directions, it is possible to reduce a decrease in suction force due to a pressure loss in the pipe of the waste gas in the post-combustion cylinder 14. Since the flow path is not changed at an acute angle, the pressure loss in the pipe of the waste gas fluid does not change even when compared with the straight post-combustion cylinder, and the amount of heat dissipated from the outer jacket surface is smaller compared to the square or cylindrical post-combustion cylinder. A disassembly cylinder becomes possible.

The fixed shaft 4 of the post-combustion cylinder is hollow, so that a cooling fluid can pass therethrough. Water is passed through the inside of the heat-resistant metal fixed shaft 4 which is suspended from the upper portion of the end plate 2 and receives the weight of the internal components as a tensile load, thereby lowering the temperature and securing the strength of the fixed shaft 4. Also,
The heat energy absorbed by the internal fluid is supplied to a heat exchanger or the like, and the energy can be supplied to the residual heat utilization facility via the heat exchanger.

A heat storage material 16 made of a porous solid ceramic material or a fibrous ceramic material having a spherical shape, a rod shape, a cylindrical shape, a dice shape, or a honeycomb shape is filled on the inner surface of the post-combustion cylinder 14 and outside the swirl vanes 5. When the temperature at the primary gas temperature sensor 6 rises sharply, the heat storage material 16
When the temperature of the primary gas temperature sensor 6 begins to decrease, the heat storage material 16 emits heat to suppress a rapid drop in the waste gas temperature. Stable combustion control at the time of rapid change in temperature at the start and stop of operation and during the incineration treatment is performed by filling the heat storage material 16 with the rapid change of the waste gas temperature and the measurement time difference of each sensor. Since the calculation error can be reduced and the range of the control signal operation correction value can be reduced, the thermal decomposition temperature of the waste gas in the fluid inside the combustion cylinder after turning is more stable.

Next, an embodiment of the post-swirling combustion tube incinerator of the present invention will be described with reference to FIGS. 7 and 8. FIG. FIG. 7 is a sectional view showing a configuration of one embodiment of the post-swirl combustion tube incinerator according to the present invention, and FIG. 8 is a top view of FIG. 7 of the post-swirl combustion tube incinerator according to the present invention. As shown in the figure, a disc-shaped spiral swirl vane 5 that forms a spiral flow path in the waste gas 22 in the upper part downstream of the primary combustion zone 23 of the incinerator 18 is an integrated swirl combustion cylinder incinerator. After the attachment, the combustion cylinder 14 is arranged vertically. The waste gas inlet 10 has an opening at the upstream base end of the spiral flow passage, and the waste gas outlet 11 has an opening at the tangential downstream base end of the afterburning cylinder 14. The treated material 20 is introduced into the primary combustion zone 23 of the incinerator 18 through the inlet 19, the ignition burner 21 is ignited, and the incineration process is started. The treated material 20 undergoes oxidative combustion and thermal decomposition to generate incinerated ash and waste gas 22.
Disc-shaped spiral swirling vane 5 forming a spiral flow path around it
After flowing into the combustion cylinder 14 and rotating twice 90 degrees, and then thermally decomposed to reduce the content of pollutants 2
7 is released from the chimney 28 to the atmosphere.

Next, an embodiment of the post-swirl combustion cylinder incinerator of the present invention will be described with reference to FIGS. 9 and 10. FIG.
FIG. 9 is a sectional view showing a configuration of an embodiment of the post-swirl combustion cylinder incinerator according to the present invention, and FIG. 10 is a top view of FIG. 9 of the post-swirl combustion cylinder incinerator according to the present invention. As shown, this is an integrated post-swirl combustion tube incinerator, which is a disk-shaped spiral swirler that forms a spiral flow path in the waste gas 22 adjacent to the downstream of the post-combustion zone 25 of the incinerator 18. The post-combustion cylinder 14 with the blades 5 is arranged vertically, and a positive-pressure post-combustion burner 15 is provided at the end of the post-combustion zone 25 for burning the unburned processed material and heating the waste gas 22. I have. The waste gas inlet 10 has an opening at the upstream base end of the spiral flow path, and the waste gas outlet 11
Have an opening at the downstream base end in the tangential direction of the afterburning cylinder 14. The treated material 20 is supplied from an incinerator 18 through an inlet 19.
And the ignition burner 21 is ignited to start the incineration process. The treated product 20 undergoes oxidative combustion and thermal decomposition to produce incinerated ash and waste gas 22, and waste gas 2
2 passes through the refractory partition 24 from the primary combustion zone 23, enters the post-combustion zone 25, is heated by the post-combustion burner 15, and is disposed around the fixed shaft 4 installed vertically adjacent to the post-combustion zone 25. After providing the disk-shaped spiral swirling blade 5 forming a spiral flow path in the gas 22, the gas 22 flows into the combustion cylinder 14,
After two 90-degree rotations, the exhaust gas 27, which has been pyrolyzed to reduce the content of pollutants, is discharged to the atmosphere from a chimney 28.
Although the post-burning zone 25 has a large space, the amount of combustion in the post-burning burner 15 increases, but the unburned processed material 22 remaining in the primary combustion zone 23 continues to be burned, and the post-burning zone 25 Fly ash will fall. Therefore, the amount of the incineration residue of the treated material is reduced, and the dust emitted to the atmosphere is also reduced.

Next, an embodiment of the post-swirl combustion cylinder incinerator of the present invention will be described with reference to FIGS. 11 and 12. FIG. FIG. 11 is a sectional view showing the configuration of one embodiment of the post-swirl combustion tube incinerator according to the present invention, and FIG. 12 is a top view of FIG. 11 of the post-swirl combustion tube incinerator according to the present invention. As shown in the figure, an integrated post-swirl combustion cylinder incinerator, comprising an incinerator 18
At the downstream upper part of the primary combustion zone 23, the disk-shaped spiral swirl vanes 5 forming a spiral flow path in the waste gas 22 are attached, and the combustion cylinder 14 is vertically arranged.
A post-combustion burner 15 for burning the unburned processed product and heating the waste gas 22 is provided below the post-combustion cylinder 14 along the spiral flow path. The waste gas inlet 10 has an opening at the upstream base end of the spiral flow passage, and the waste gas outlet 11 has an opening at the tangential downstream base end of the afterburning cylinder 14. The treated material 20 is introduced into the primary combustion zone 23 of the incinerator 18 through the inlet 19, the ignition burner 21 is ignited, and the incineration process is started. The treated material 20 undergoes oxidative combustion and pyrolysis to generate incinerated ash and waste gas 22, and the waste gas 22
After passing through the refractory partition wall 24 from the primary combustion zone 23 and entering the post-combustion zone 25, the post-combustion cylinder 14 is attached in the tangential direction of the jacket, and then heated by the combustion burner 15, and
The surrounding waste gas 22 flows into the combustion cylinder 14 after the provision of the disk-shaped spiral swirl vanes 5 forming a spiral flow path, and the waste gas 22
After the rotation, the exhaust gas 27, which has been pyrolyzed to reduce the content of pollutants, is discharged to the atmosphere from a chimney 28.

[0023]

According to the first aspect of the present invention, the amount of heat dissipated from the outer wall surface of the post-combustion zone located downstream of the primary combustion zone is reduced by 28% as compared with the existing incinerator with post-combustion furnace.
The length of the post-combustion cylinder, the height of the chimney, or the length of the duct is shortened by integrally mounting the swirl-type combustion cylinder of the inner fin swirl type, which has a compact heat dissipation amount without changing the pressure loss in the pipe of the waste gas fluid, downstream of the incinerator It is possible to solve the shortage of residence time when pyrolyzing waste gas containing toxic substances, and to improve the pyrolysis efficiency by operating the combustion controller with a control panel equipped with a control circuit. Stabilize and control the emission of dioxins during steady-state operation.In addition, the incomplete combustion and waste gas pyrolysis temperature will remain low for several tens of seconds immediately after the start of operation and several tens of seconds before the stop of operation. An excellent effect can be exhibited in reducing the amount of pollutants and harmful substances such as dust and dioxins in waste gas released to the atmosphere.

[Brief description of the drawings]

FIG. 1 is a typical sectional view showing one embodiment of a post-swirl combustion cylinder incinerator according to the present invention.

FIG. 2 is a top view of FIG. 1 of the post-swirl combustion cylinder incinerator according to the present invention.

FIG. 3 is a structural sectional view showing one embodiment of a post-swirl combustion cylinder of the post-swirl combustion cylinder incinerator according to the present invention.

FIG. 4 is a top view of FIG. 3 of the post-swirling combustion cylinder according to the present invention.

FIG. 5 is a diagram showing a state of a flow of waste gas in an existing incinerator with a post-burning furnace.

FIG. 6 is a diagram showing a state of a flow of waste gas in a post-swirl combustion cylinder incinerator according to the present invention.

FIG. 7 is a sectional view showing the configuration of an embodiment of a post-swirl combustion cylinder incinerator according to the present invention.

8 is a top view of FIG. 7 of the post-swirl combustion cylinder incinerator according to the present invention.

FIG. 9 is a cross-sectional configuration view showing one embodiment of a post-swirl combustion cylinder incinerator according to the present invention.

10 is a top view of FIG. 9 of the post-swirl combustion cylinder incinerator according to the present invention.

FIG. 11 is a sectional view showing a configuration of an embodiment of a post-swirl combustion cylinder incinerator according to the present invention.

FIG. 12 shows a post-swirling combustion tube incinerator according to the present invention;
FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Body plate 2 End plate 3 Fireproof and heat-insulating material 4 Fixed shaft 5 Revolving blade 6 Primary gas temperature sensor 7 Suction pressure sensor 8 Secondary gas temperature sensor 9 Gas flow rate adjustment damper 10 Waste gas inlet 11 Waste gas outlet 12 Water inlet 13 Water Outlet 14 Post-combustion cylinder 15 Post-combustion burner 16 Heat storage material 17 Combustion controller 18 Incinerator 19 Input port 20 Processed material 21 Ignition burner 22 Waste gas 23 Primary combustion zone 24 Refractory partition 25 Post-combustion zone 26 Swirling flow 27 Exhaust gas 28 Chimney 29 Ash discharge port 30 Negative pressure gas 31 Upstream gas stagnation part 32 Downstream gas stagnation part

Continued on the front page F term (reference) 3K062 AA18 AB01 AC01 AC19 BA02 CB10 DA01 DA11 DB13 3K078 AA06 BA03 BA26 CA02 CA04 CA17 CA22

Claims (7)

[Claims] An integrated incinerator body with a post-combustion zone, wherein a post-combustion cylinder having a cylindrical duct shape on which an inner surface is provided with refractory insulation material is vertically disposed downstream of a primary combustion zone of a waste incinerator. A disk-shaped spiral that suspends a fixed shaft provided along the axis of the post-combustion cylinder from above the upper end plate of the post-combustion cylinder to form a spiral flow path of waste gas around the fixed axis of the post-combustion cylinder. And a swirl combustion cylinder incinerator having a swirl-shaped swirl vane. 2. A downstream side of the primary combustion zone of the furnace main body, at an upstream end of a post-combustion cylinder, a positive pressure for heating the combustion of the unburned processed material and the waste gas along a spiral flow path. Item 2. The post-swirl combustion cylinder incinerator according to Item 1, which is provided with a post combustion burner. 3. The incinerator according to claim 2, wherein said afterburner is mounted tangentially to a jacket of said afterburner and has a tangential waste gas outlet. 4. A waste gas inlet and a waste gas outlet of the post-combustion cylinder each have an opening in a tangential direction of a jacket of the post-combustion cylinder, and a waste gas inlet and a waste gas outlet are upstream of the spiral flow path. 2. The post-swirl combustion cylinder incinerator according to claim 1, which is disposed so as to be directed to the side base end and the downstream base end. 5. The swivel blade according to claim 1, wherein the swirl vane is attached to a fixed shaft suspended from an upper portion of the end plate, and the fixed shaft has a hollow shape through which a fluid passes. Combustion cylinder incinerator. 6. A spherical, rod-shaped, cylindrical, dice-shaped or honeycomb-shaped outer surface of the swirl vanes on the inner surface of a cylindrical duct-shaped post-combustion cylinder having a disk-shaped spiral swirl vane forming the spiral flow passage. Item 6. The post-swirling combustion cylinder incinerator according to any one of Items 1 to 5, which is filled with a porous porous heat storage solid ceramic material or a fibrous ceramic material. 7. A measurement value signal of a secondary gas temperature sensor and a waste gas suction pressure sensor downstream of the post-combustion cylinder forming a spiral flow path by heating the post-combustion zone and the post-combustion cylinder with a post-combustion burner. After controlling the opening degree with the gas flow rate adjustment damper, the ignition burner is ignited, and the fuel amount of the post-burning burner is controlled according to the waste gas temperature in the primary combustion zone of the processed material. After the steady operation, the signal values of the secondary gas temperature sensor and the waste gas suction pressure sensor are recalculated by the combustion controller to stabilize the waste gas decomposition temperature and control the fuel amount of the post-burning burner. . The operation control operation is operated by a control panel which is programmed in an integrated circuit of the combustion controller.
Item 7. A post-swirl combustion cylinder incinerator according to any one of Items 1 to 6.