JP2939254B1 - Exhaust gas treatment equipment for incinerators - Google Patents

Abstract

Abstract: [PROBLEMS] To use a blower having a low heat-resistant temperature while easily treating dust and fine combustible substances in combustion exhaust gas, minimizing dust and fine combustible substances discharged to the atmosphere. Provide an exhaust gas treatment device for an incinerator that can be used. SOLUTION: A reburning means 3 for reburning the combustion exhaust gas from the incinerator 2, a water treatment means 4 for injecting the treated water into the reburned exhaust gas after the reburning by the reburning means 3, and treating the same, A gas-liquid separator 5 for gas-liquid separation of the treated exhaust gas and treated water after the treatment by the means 4; an exhaust pipe 6 for discharging the treated exhaust gas separated by the gas-liquid separator 5 to the atmosphere; Means 5
A blower that is interposed at the subsequent stage and sends gas to the discharge pipe 6 side through the reburning means 3, the water treatment means 4, and the gas-liquid separation means 5.
And

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an exhaust gas treatment device for an incinerator for treating dust and fine combustible substances in exhaust gas discharged from an incinerator.

[0002]

2. Description of the Related Art When incinerating synthetic resin waste or the like in an incinerator, dust and fine combustible materials are discharged into the atmosphere together with the combustion exhaust gas. A method of treating with an exhaust gas treatment device is employed.

In this exhaust gas treatment apparatus, conventionally, primary combustion exhaust gas generated in an incinerator is sent to a secondary combustion chamber by a blower, and secondary combustion is performed in the secondary combustion chamber, and the secondary combustion exhaust gas is cyclone (centrifuged). After the tertiary combustion and dust collection processing are performed by sending the tertiary combustion to an exhaust gas treatment chamber which also serves as a tertiary combustion chamber, the tertiary combustion is discharged to the atmosphere via a discharge pipe.

[0004]

In this conventional exhaust gas treatment apparatus, a blower is provided on the incinerator side, and the blower is used to forcibly blow air from the incinerator through the secondary combustion chamber and the tertiary combustion chamber to the discharge pipe. I am trying to do it. For this reason, depending on the amount of air blown by the blower, the combustible substances cannot be sufficiently burned on each combustion chamber side, and the incompletely-combusted combustion exhaust gas containing a large amount of fine combustible substances is directly discharged to the atmosphere. There is a drawback that it is difficult to adjust the amount of air to be blown.

Further, dust is collected by a cyclone in an exhaust gas treatment chamber which also serves as a tertiary combustion chamber, and dust is removed from the tertiary combustion exhaust gas. Therefore, dust in the tertiary combustion exhaust gas is reliably removed. And there is a problem that a large amount of dust is discharged to the atmosphere.

The present invention has been made in view of such conventional problems, and can easily treat dust and fine combustible substances in combustion exhaust gas, and can reduce dust and fine combustible substances discharged to the atmosphere as much as possible. It is an object of the present invention to provide an incinerator exhaust gas treatment apparatus that can reduce the number of blowers and can use a blower having a low heat-resistant temperature.

[0007]

According to the present invention, there is provided a reburning means for reburning flue gas from an incinerator and a process for injecting treated water into the reburned gas after reburning by the reburning means. Water treatment means 4 for treatment, gas-liquid separation means 5 for gas-liquid separation of the treated exhaust gas and treated water after treatment by the water treatment means 4,
A discharge pipe 6 for discharging the treated exhaust gas separated by the gas-liquid separation means 5 to the atmosphere; and a re-combustion means 3, a water treatment means 4, and a gas-liquid separation means 5 interposed at a stage subsequent to the gas-liquid separation means 5. And a blower 7 for sending gas to the discharge pipe 6 side.

[0008]

An embodiment of the present invention will be described below in detail with reference to the drawings. This incinerator exhaust gas treatment device 1
As shown in FIGS. 1 to 3, the incinerator 2 is configured separately from the incinerator 2, and is used by being connected to the latter stage of the incinerator 2. The incinerator 2 is for incineration of, for example, oil-impregnated waste and synthetic resin-made automobile parts (sponge portions of sheets, door lining materials, other synthetic resin parts, etc.). Incineration treatment is also possible.

The exhaust gas treatment apparatus 1 includes a re-combustion unit (hereinafter, re-combustion is referred to as secondary combustion) for re-combusting the primary combustion exhaust gas from the incinerator 2, and a secondary combustion unit 3. Water treatment means 4 for injecting treated water into the treated secondary combustion exhaust gas to treat the treated water; gas-liquid separation means 5 for separating gas and liquid from the treated secondary combustion exhaust gas and the treated water by the water treatment means 4; A discharge pipe 6 for discharging the secondary combustion exhaust gas separated by the gas-liquid separation means 5 to the atmosphere; and a secondary combustion means 3, a water treatment means 4, interposed at a stage subsequent to the gas-liquid separation means 5. A blower 7 for sending gas to the discharge pipe 6 side through the means 5;
Is placed on top.

The secondary combustion means 3 introduces the primary combustion exhaust gas from the lower side and discharges the secondary combustion exhaust gas from the upper side.
A secondary combustion chamber 9 and a secondary combustion burner 10 for secondary combustion of the primary combustion exhaust gas introduced into the secondary combustion chamber 9;
In the secondary combustion chamber 9, the primary combustion exhaust gas is supplied to the secondary combustion burner 10.
Guide means 11 for guiding while turning to the upper side through the side
Is provided.

The secondary combustion chamber 9 has a vertical cylindrical shape,
A discharge pipe 6 is provided in the center part so as to penetrate in the vertical direction, and an inlet 13 for introducing primary combustion exhaust gas into a lower part of the peripheral wall 12;
An air supply port 14 for taking in air for secondary combustion and a discharge port 15 for secondary combustion exhaust gas are formed in a tangential direction at the upper part. The inlet 13 is provided with a first temperature sensor 16 for detecting the temperature of the primary flue gas, and the outlet 15 is provided with a second temperature sensor 17 for detecting the temperature of the second flue gas. The first temperature sensor 16 is located near the inlet 13,
It is sufficient that the second temperature sensors 17 are provided in the vicinity of the outlet 15 respectively.

The first temperature sensor 16 includes an operating temperature (for example, about 800 to 1000 degrees) of the primary combustion exhaust gas at the time of transition from the timer operation to the automatic operation, and a secondary combustion burner 10 and a water supply pump 18 during the operation ending process. This is for detecting a first stop temperature (for example, 700 ° C. or lower) of the primary combustion exhaust gas that is appropriate for stopping the operation. 2nd temperature sensor
Reference numeral 17 denotes an optimum operating temperature (for example, about 1300 ° C.) of the secondary combustion exhaust gas capable of removing harmful substances in the primary combustion exhaust gas by a combustion process during automatic operation, and a blower 7 during the operation end process.
To detect a second stop temperature (for example, 800 degrees or less) of the secondary combustion exhaust gas that is appropriate for stopping the combustion.

The secondary combustion burner 10 is provided on the peripheral wall 12 of the secondary combustion chamber 9.
Is connected to a fuel tank 19 fixed to a lower portion of the support frame 8 via a fuel supply pipe 20, and burns kerosene supplied from the fuel tank 19 by a fuel pump (not shown). The flame is sent to the secondary combustion chamber 9
It is configured to spray secondary combustion gas to perform secondary combustion. The air supply port 14 includes an adjustment valve 21 so that the air supply amount can be appropriately adjusted. In addition, air supply port
14 only needs to be at the lower part of the secondary combustion chamber 9.

The guide means 11 comprises a guide plate 22 spirally fixed to the inner surface of the peripheral wall 12 of the secondary combustion chamber 9. The guide means 11 is a guide plate that is continuous in the spiral direction.
Although the guide plate 22 is formed, it is not always necessary to provide the guide plate 22 in a continuous manner, and the guide plate 22 may be divided into a plurality of pieces in the spiral direction, or may be formed of something other than the guide plate 22. The inner circumference of the guide plate 22 may be fixed by abutting the discharge pipe 6, but a slight gap may be provided between the guide plate 22 and the discharge pipe 6.

The water treatment means 4 has a secondary combustion chamber 9
And a water treatment chamber, the lower side of which is connected to the gas-liquid separation means 5 respectively.
23, an injection nozzle 24 for injecting the treated water downwardly into the secondary combustion exhaust gas in the water treatment chamber 23 in a shower form, and the treated water is supplied to the injection nozzle 24 via a water distribution pipe 25 and a branch pipe 26. A water supply pump 18 for supplying water is provided. The water treatment chamber 23 has a cylindrical shape in the vertical direction, and is installed on the support frame 8 at a position lower than the secondary combustion chamber 9. A communication pipe 28 communicating with the outlet 15 of the secondary combustion chamber 9 is provided at the center of the upper wall 27 of the water treatment chamber 23 so that the secondary combustion exhaust gas flows downward from above in the water treatment chamber 23. The gas-liquid separation means 5 is connected to the center of the bottom wall 29 from below.

In the water treatment chamber 23, a swirling means 60 for swirling the secondary combustion exhaust gas in the water treatment chamber 23 is provided above the injection nozzle 24 so as to correspond to the opening side of the communication pipe 28. And a capture net 61 formed by laminating one or more metal nets made of stainless steel or the like with a fine mesh is provided near the bottom wall 29. Turning means 60
Is constituted by an umbrella-shaped cone 62 and a plurality of guide plates 63 provided on the upper side of the cone 62 in the circumferential direction and guiding the secondary combustion exhaust gas in the turning direction. The capture net 61 is disposed in the water treatment chamber 23 at a predetermined distance from the bottom wall 29.

A plurality of, for example, two, injection nozzles 24 are arranged vertically in the upper central portion of the water treatment chamber 23,
It is provided at the tip of a branch pipe 26 that penetrates the peripheral wall 23a of the 23 inward and outward. The injection amount of the treated water from the injection nozzle 24 is set to, for example, about 15 to 30 liters per minute in accordance with the flow rate of the exhaust gas.

The gas-liquid separation means 5 includes a gas-liquid separation tube 30 disposed substantially horizontally below the water treatment chamber 23,
A drain pipe 31 connected from below to the bottom wall on the downstream side of 30 is provided. The upstream side of the gas-liquid separation pipe 30 is bent upward and connected to the bottom wall 29 of the water treatment chamber 23, and the treated water is
It is connected to the inlet pipe 33 of the blower 7 through the step 32 so as not to flow into the side. Then, the gas-liquid separation means 5 is configured such that the treated exhaust gas after the water treatment flowing in from the water treatment chamber 23 passes through the upper side of the gas-liquid separation tube 30 to the blower 7 side, and the treated water containing dust and the like is subjected to the gas treatment. Drainage pipe 31 that accumulates on the bottom wall in liquid separation pipe 30
It flows down from below.

Below the gas-liquid separating means 5, a treated water storage tank for storing the treated water separated by the gas-liquid separating means 5
34 are provided. The treated water storage tank 34 is provided with a filtering means 35 for filtering the treated water therein.
The treated water filtered by is supplied to the injection nozzle 24 by the water supply pump 18.

A drain pipe 31 is connected to the treated water storage tank 34. The inside of the treated water storage tank 34 is divided into a primary filtration unit 38, a secondary filtration unit 39, and a pumping unit 40 by an overflow plate 36 and a partition plate 37, and the treated water overflows from the overflow plate 36, Plate 37 through hole 41
While flowing to the pumping section 40 via a, solids such as dust are precipitated from the treated water and filtered. The pumping section 40 is provided with a strainer 41, and the strainer 41 is connected to a water suction pipe 42 of the water supply pump 18. The filtering means 35 includes an overflow plate 36, a partition plate 37, a strainer 41, and the like. In addition, the treated water is circulated and used between the treated water storage tank 34, the water treatment means 4 and the gas-liquid separation means 5 by the water supply pump 18. In the treated water, soap water containing a surfactant and other cleaning liquids are mixed at an appropriate ratio.

The blower 7 is of a centrifugal type or the like, and has a casing 43 connected to the gas-liquid separating means 5 through an inlet pipe 33, and a blade 44 rotatably provided in the casing 43.
And a motor for rotating the blade 45 (not shown)
And is fixed to the support frame 8 near the lower part of the secondary combustion means 3. The lower end of the discharge pipe 6 is tangentially connected to the casing 43 so that the treated exhaust gas after gas-liquid separation sucked in the axial direction via the inlet pipe 33 is discharged upward in a tangential direction. The inlet pipe 33 on the upstream side of the blower 7 is provided with an air inlet 45 for sucking outside air. The air inlet 45 is provided with an adjustment valve 46 for adjusting the amount of air suction.

At an appropriate place of the support frame 8, a control box 47 is provided.
Is provided. The control box 47 is provided with a manual operation switch 48, an automatic operation switch 49, and various setting switches 50, and includes control means 51 such as a CPU therein.
Is incorporated.

As shown in FIG. 4, the control means 51 includes a manual control section for manually controlling the secondary combustion means 3, the blower 7, the water supply pump 18 and the like during the start-up operation. , A timer control unit 52 for controlling the blower 7, the water supply pump 18, and the like, an operation control unit 53, a first stop control unit 54, and a second stop control unit 55.

The timer control unit 52 includes an automatic operation switch 49
During the predetermined time from the operation of the secondary combustion means to the transition to the steady operation, the secondary combustion burner 10 of the secondary combustion means 3 and the water treatment means 4
This is for timer control of the water supply pump 18, the blower 7 and the like. The operation control unit 53 determines that the first temperature sensor 16
When detecting that the temperature of the next combustion exhaust gas rises to the operating temperature (for example, about 800 to 1000 degrees) or more, the timer control unit 52
From the timer operation to the steady operation, the secondary combustion burner 10 of the secondary combustion means 3 and the water supply pump of the water treatment means 4
It has a function of automatically operating the fan 18 and the blower 7, and a function of performing feedback control of the secondary combustion burner 10 and the blower 7 by a signal from the second temperature sensor 17 so as to obtain an appropriate combustion temperature of the secondary combustion exhaust gas. . In addition, the timer control unit
52, when the first temperature sensor 16 does not detect the rise to the operating temperature or higher, the operation is stopped by ending the timer control.

The first stop control unit 54 includes a first temperature sensor 16
Has a function to stop the secondary combustion burner 10 of the secondary combustion means 3 and the water supply pump 18 of the water treatment means 4 when detecting that the temperature of the primary combustion exhaust gas has dropped below the first stop temperature.
The second stop control unit 55 is a secondary combustion burner of the secondary combustion means 3.
A function is provided for stopping the blower 7 when the second temperature sensor 17 detects a drop in the secondary combustion exhaust gas below the second stop temperature after the stop of the feed pump 18 of the water treatment means 4 and the water treatment means 4. I have.

Next, the operation of the incinerator exhaust gas treatment device 1 will be described. First, prior to operation, treated water storage tank 34
The required amount of treated water is injected into the inside. Next, in the case of automatic operation, the automatic operation switch 49 is provided almost simultaneously with the start of operation of the incinerator 2.
And the exhaust gas treatment device 1 is set to a timer operation state by the timer control unit 52. In this timer operation, the secondary combustion burner 10 of the secondary combustion means 3, the water supply pump 18 of the water treatment means 4, and the blower 7 operate.

When the blower 7 operates, the incinerator 2, the secondary combustion chamber 9 of the secondary combustion means 3, the communication pipe 28, the water treatment chamber 23 of the water treatment means 4, and the gas-liquid separation pipe 30 of the gas-liquid separation means 5 Then, the gas starts flowing through the blower 7 and the discharge pipe 6.

The primary combustion exhaust gas is introduced into the secondary combustion chamber 9
When the temperature of the primary combustion exhaust gas rises to the automatic operation temperature (about 800 to 1000 degrees), the first temperature sensor 16 shifts from the timer operation to the steady automatic operation by the operation control unit 53, and the blower 7 The operation of the secondary combustion burner 10 and the feed water pump 18 is continued. If the temperature on the inlet 13 side does not rise for some reason, the blower 7, 2
The operation of the next combustion burner 10 and the feedwater pump 18 is stopped.

In the case of manual operation, the temperature of the primary combustion exhaust gas rises within a few minutes from the start of combustion in the incinerator 2, and at that time, the operation of the blower 7, the secondary combustion burner 10, and the water supply pump 18 is started. I do.

In any of the automatic operation and the manual operation, after the operation is started, the incinerators 2 to 2 are operated by the blower of the blower 7.
The primary combustion exhaust gas is sucked into the secondary combustion chamber 9, and the primary combustion exhaust gas is secondary-combusted by the flame of the secondary combustion burner 10 in the secondary combustion chamber 9, and communicates through the communication pipe 28 to the water treatment means 4. It flows into the water treatment chamber 23. In this way, the incinerator is
By sucking the primary combustion exhaust gas of No. 2 and introducing it into the secondary combustion chamber 9 of the secondary combustion means 3, the primary combustion exhaust gas is pumped from the conventional incinerator 2 to the secondary combustion means 3. In comparison with the case, the primary combustion exhaust gas in the incompletely combusted state is not supplied from the incinerator 2 side to the secondary combustion means 3 side, and harmful substances and combustible substances in the primary combustion exhaust gas are removed. Can be reduced.

Since the guide plate 22 has a spiral shape in the secondary combustion chamber 9, the primary combustion exhaust gas flowing into the secondary combustion chamber 9 spirally rises along the guide plate 22, during which time. To 2
The flame from the secondary combustion burner 10 uniformly burns the combustible dust and fine combustible substances in the secondary combustion exhaust gas.

Further, since external air is sucked into the secondary combustion chamber 9 from the air supply port 14, the air in the secondary combustion chamber 9
The air required for the next combustion can be replenished as needed, incomplete combustion in the secondary combustion chamber 9 can be prevented, and if the suction resistance on the incinerator 2 side is large, the air from the air supply port 14 The amount of air suction increases, and the incinerator 2 does not forcibly suck the incompletely burned primary combustion exhaust gas.
Therefore, combustible substances in the secondary combustion exhaust gas are removed from the secondary combustion chamber 9.
It can be processed reliably by the secondary combustion in the inside.

Particularly in automatic driving, the operation control unit 53 operates,
Since the secondary combustion burner 10 and the blower 7 are controlled in accordance with a signal from the second temperature sensor 17 so that the secondary combustion exhaust gas has an appropriate operating temperature, harmful substances such as dioxin in the primary combustion exhaust gas are subjected to secondary combustion. Can be removed.

In the water treatment chamber 23, treated water is sprayed from a spray nozzle 24 almost uniformly in a shower shape over the whole of the room, and secondary combustion exhaust gas swirls in the treated water sprayed in a shower shape. The secondary combustion exhaust gas is cooled and condensed by the treated water because the secondary combustion exhaust gas is passed while being swirled by the swirling action of the means 60. At the same time, the droplets of the treated water adhere to the dust in the secondary combustion exhaust gas to form fine dust. But it falls along with the treated water.

Since the treated exhaust gas that has passed through the treated water is further cooled when passing through the trapping net 61 in the water treatment chamber 23, the trapping net 61 reliably traps fine dust and the like in the treated exhaust gas. Can be removed. And the capture net
The fine dust and the like captured by 61 can be washed away by the treated water injected from the injection nozzle 24. Especially,
Since the treated water contains a surfactant, even if there are oils and the like in the treated exhaust gas, they can be easily removed.

The treated exhaust gas and the treated water containing dust and the like that have passed through the water treatment chamber 23 flow from the bottom of the water treatment chamber 23 to the gas-liquid separation pipe 30 of the gas-liquid separation means 5. While passing through the pipe 30, the gas is separated into the treated exhaust gas and the treated water containing dust and the like. That is, the treated water containing dust and the like flows down from the drain pipe 31 through the bottom of the gas-liquid separation pipe 30 to the primary filtration section 38 of the treated water storage tank 34, and the treated exhaust gas containing water vapor is subjected to gas-liquid separation. The air passes through the upper part of the pipe 30 and is sucked into the blower 7.

As described above, although the blower 7 sucks the primary combustion exhaust gas, the secondary combustion exhaust gas, etc. through the incinerator 2 and the secondary combustion chamber 9, the blower 7 is kept in the water treatment means.
4, when passing through the water treatment means 4, the treated water injected from the injection nozzle 12
The secondary combustion exhaust gas having a high temperature of about 00 degrees is for example 200 to 3
The cooled exhaust gas having a low temperature after cooling can be sufficiently cooled to about 00 degrees. Therefore, a blower having a low heat-resistant temperature can be used, and the blower 7 can be implemented at low cost.

Further, a gas-liquid separation means 5 is provided upstream of the blower 7, and the gas-liquid separation means 5 separates the treated exhaust gas from the treated water containing sludge-like dust, so that the blower 7 can be prevented from being clogged. . Further, since the blower 7 introduces external air from the air inlet 13, the temperature of the treated exhaust gas also decreases due to the air. Moreover, incinerator 2, secondary combustion means
3. If the suction resistance on the water treatment means 4 side is large, the blower 7 introduces external air from the air inlet 13 so that the primary combustion exhaust gas incompletely combusted on the incinerator 2 side is forcibly removed. Therefore, an appropriate amount of the primary combustion exhaust gas can be introduced into the secondary combustion means 3 according to the combustion state in the incinerator 2 without being introduced into the secondary combustion means 3. Of course, overload of the blower 7 can be prevented.

When treated water flows into the receiving sedimentation section of the treated water storage tank 34, sludge-like dust and the like settles at the bottom in the primary filtration section 38, and the supernatant of the treated water overflows from the primary filtration section 38. Flow plate 36
Through the secondary filtration unit 39, the secondary filtration unit 39 and the partition plate 37
It flows sequentially to the pumping section 40 via 41a, during which the treated water can be filtered. The sludge dust deposited and deposited on the bottom of the treated water storage tank 34 may be removed periodically. The treated water after filtration is sent through the strainer 41 and the water suction pipe to the water supply pump 18 to be pressure-fed to the injection nozzle 24 via the water distribution pipe 25 and the branch pipe 26. For this reason, the treated water can be circulated and used, and even when circulated, the sludge-like dust and the like are removed by filtration, so that clogging of the water supply pump 18, the injection nozzle 24, and the like can be prevented.

The treated exhaust gas that has passed through the blower 7 is discharged to the atmosphere via a discharge pipe 6. Although the treated exhaust gas is in the form of white smoke containing a large amount of water vapor, the water vapor evaporates due to the heat of the secondary combustion means 3 when passing through the discharge pipe 6. Therefore, the treated exhaust gas is discharged in a substantially colorless and transparent state.
Can be discharged from 6.

When the primary combustion of the waste in the incinerator 2 is completed, the temperature of the primary combustion exhaust gas on the inlet 13 side of the secondary combustion chamber 9 becomes lower than the operating temperature (800 to 1000 degrees). Since the temperature has decreased to the stop temperature and the first temperature sensor 16 detects the decrease in the temperature, the first stop control unit 54 operates to stop the combustion burner and the water supply pump 18. After that, the blower 7 continues to operate, but when the temperature at the outlet 15 side of the secondary combustion chamber 9 drops below the second stop temperature, and the second temperature sensor 17 detects the drop in the temperature, the second The stop control unit 55 operates to stop the blower 7. This completes the exhaust gas treatment.

Although the embodiment of the present invention has been described in detail, the present invention is not limited to this embodiment.
The present invention can be implemented in various other modes. For example, in the embodiment, the exhaust gas treatment device 1 is configured separately from the incinerator 2, but may be configured integrally. The secondary combustion chamber 9
The water treatment chamber 23 is formed in a vertically long cylindrical shape, but its shape is arbitrary. Furthermore, the secondary combustion chamber of the secondary combustion means 3
In 9, a plurality of containers may be connected in series to burn in multiple stages. That is, the reburning means 3 can be configured to perform secondary combustion, tertiary combustion, and the like.

The gas-liquid separation means 5 includes a drain pipe connected to the gas-liquid separation pipe 30.
A structure other than the structure provided with 31 may be used. Blower 7
For example, a centrifugal type blower, for example, an axial blower may be used. The control box 47 may be provided at a location that is not easily affected by heat, such as the secondary combustion means 3. 1st temperature sensor 16, 2nd
Sensors other than the temperature sensor 17 may be added to achieve fully automatic control.

[0044]

According to the present invention, a reburning means 3 for reburning combustion exhaust gas from an incinerator 2 and a water treatment for injecting treated water into the reburning exhaust gas after reburning by the reburning means 3 for treatment. Means 4, gas-liquid separation means 5 for gas-liquid separation of the treated exhaust gas and treated water after treatment by the water treatment means 4, and gas-liquid separation means
5 An exhaust pipe that discharges the treated exhaust gas after separation into the atmosphere
And the re-combustion means 3
And a blower 7 for sending gas to the discharge pipe 6 via the water treatment means 4 and the gas-liquid separation means 5, so that dust and fine combustible substances in the combustion exhaust gas can be easily treated and discharged. There is an advantage that dust and fine combustible substances discharged to the atmosphere from the pipe 6 can be reduced as much as possible and a blower 7 having a low heat-resistant temperature can be used.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of an exhaust gas treatment apparatus for an incinerator showing one embodiment of the present invention.

FIG. 2 is a plan view of an exhaust gas treatment device for an incinerator according to an embodiment of the present invention.

FIG. 3 is a cross-sectional view of a secondary combustion unit showing one embodiment of the present invention.

FIG. 4 is a block diagram of control means showing one embodiment of the present invention.

[Description of sign]

 2 Incinerator 3 Secondary combustion means (reburning means) 4 Water treatment means 5 Gas-liquid separation means 6 Discharge pipe 7 Blower 9 Secondary combustion chamber (reburning chamber) 10 Secondary combustion burner (reburning burner) 11 Guide means 14 Air supply port 16 First temperature sensor 17 Second temperature sensor 18 Water supply pump 23 Water treatment chamber 24 Injection nozzle 34 Treated water storage tank 35 Filtration means 45 Air suction port 51 Control means 53 Operation control unit 54 First stop control unit 55 Second stop control unit

Claims (8)

(57) [Claims] A reburning means for reburning flue gas from an incinerator, and treating the reburned gas after reburning by injecting treated water with the reburning means. Water treatment means
(4), gas-liquid separation means (5) for gas-liquid separation of the treated exhaust gas and treated water after the treatment by the water treatment means (4), and the gas-liquid separation means (5) after the separation by the gas-liquid separation means (5) A discharge pipe (6) for discharging the treated exhaust gas to the atmosphere, and a re-combustion means (3), a water treatment means (4), and a gas-liquid separation means interposed at a stage subsequent to the gas-liquid separation means (5). An exhaust gas treatment device for an incinerator, comprising: a blower (7) for sending gas to the discharge pipe (6) through (5). 2. The exhaust pipe (6) is provided so as to penetrate the reburning means (3), and the blower is provided in front of the exhaust pipe (6).
The exhaust gas treatment device for an incinerator according to claim 1, wherein (7) is disposed. 3. The reburning means (3) comprises: a reburning chamber (9) for introducing the flue gas from a lower side and discharging the reburning flue gas from an upper side; A reburn burner (10) for reburning the combustion exhaust gas introduced into the combustion chamber, and swirling the combustion exhaust gas upward through the reburn burner (10) in the reburn chamber (9). 3. The exhaust gas treatment device for an incinerator according to claim 1, further comprising a guide means for guiding the waste gas while performing the operation. 4. An air supply port (14) for reburning the combustion exhaust gas at a lower side of the reburn chamber (9). Exhaust gas treatment equipment for incinerators. 5. The water treatment means (4) comprises a water treatment chamber (23) having an upper part connected to the reburning chamber (9) and a lower part connected to the gas-liquid separation means (5). An injection nozzle (24) for injecting the treated water downward in a shower-like manner with respect to the reburn exhaust gas in the treatment chamber (23). Exhaust gas treatment equipment for incinerators. 6. An exhaust gas treatment for an incinerator according to claim 1, further comprising a suction port (45) for introducing external air upstream of said blower (7). apparatus. 7. A treated water storage tank (34) for storing the treated water separated by the gas-liquid separation means (5), and a filtration means (35) for filtering treated water in the treated water storage tank (34). ) And the treated water filtered by the filtration means (35).
The exhaust gas treatment device for an incinerator according to any one of claims 1 to 6, further comprising: a water supply pump (18) for supplying water to (4). 8. A first temperature sensor (16) and a second temperature sensor (17) provided on the side of introducing the flue gas and the side of discharging the reburn exhaust gas of the reburn means (3), and these temperature sensors (16) A control means (51) for controlling the reburning means (3), the water treatment means (4), and the blower (7) by a signal of (17), and the control means (51) When the first temperature sensor (16) detects an increase in the temperature of the combustion exhaust gas to an operating temperature or higher, the reburning means (3) comprises the water treatment means.
(4) and an operation control unit (53) for operating the blower (7),
A first stop control unit (54) for stopping the reburning means (3) and the water treatment means (4) when the first temperature sensor (16) detects a decrease in the combustion exhaust gas to a stop temperature or lower.
And a second stop control unit (55) for stopping the blower (7) when the second temperature sensor (17) detects a drop in the reburning exhaust gas to a stop temperature or lower. The exhaust gas treatment device for an incinerator according to claim 1.