JP2022114392A - Flue gas treatment device - Google Patents

Abstract

To provide a flue gas treatment device capable of enhancing cleanliness in a water channel of a plumbing system, simplifying a configuration, and appropriately controlling characteristics of a discharged flue gas by appropriately managing a water temperature.SOLUTION: A flue gas treatment device 1 is configured such that an upstream side overflow pipe 38 for causing stored water rising above a prescribed water level to overflow and get discharged to the outside of the flue gas treatment device and a downstream side horizontal discharge pipe 39 are continuously provided at positions closer to an air outlet 30 side than a shield plate 24 of a flue gas treatment chamber 4, a water discharge pipe 36 for discharging the stored water is provided at a position lower than the prescribed water level on the midway of the downstream side horizontal discharge pipe 39, and a discharge valve 37 is provided on the midway of the water discharge pipe 36.SELECTED DRAWING: Figure 1

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flue gas treatment apparatus, and more particularly to a flue gas treatment apparatus for removing impure components from flue gases containing impure components emitted from fried food factories, kitchens, and the like.

In general, the flue gas discharged from fried food factories, kitchens, etc. contains a large amount of vaporized oil, evaporated water, fine fried dregs, cinders, dust, and other impure components.

In order to remove the impurities in the flue gas, conventionally, the flue gas is passed through a filter made of fine mesh, cloth, felt, non-woven fabric, etc. to remove it dry, or the flue gas is passed through water. It was removed by a wet method by letting it dry.

However, in commercial fried food factories and kitchens, the amount of smoke emitted is very large and the content of impure components is also high. I have a problem that I can't

In addition, in the case of conventional dry or wet smoke removal means, for example, a large amount of impure components such as oil are attached, so if a fire occurs in the kitchen, or the temperature of the smoke is extremely high, There is also the problem that when the temperature rises, the impurity components may spread, which is extremely dangerous.

Under such circumstances, the present applicant has developed a flue gas treatment apparatus that can efficiently and reliably remove impure components even in flue gas with a high content of impure components and that is extremely safe. proposed (see Patent Document 1).

Japanese Patent No. 4118994

The flue gas treatment apparatus proposed by the present applicant uses water to purify the flue gas.

Therefore, the present invention can improve the cleanliness of the water flow path of the water-related system in the above-described flue gas treatment device and simplify the configuration, and the characteristics of the flue gas discharged while properly managing the water temperature. It is an object of the present invention to provide a flue gas treatment apparatus capable of appropriately controlling the

In order to achieve the above object, the first aspect of the present invention provides a flue gas treatment apparatus having a flue gas treatment chamber communicating with an air outlet and storing water at a predetermined water level at the bottom and discharging the flue gas. is disposed at a position higher than the predetermined water level into the flue gas treatment chamber, and a demister for removing impure components in the flue gas is disposed in the flue gas flow path inside the flue gas treatment chamber. A cooling water injection nozzle for injecting cooling water toward the demister is provided inside the flue gas treatment chamber, and the flue gas passes through the demister and is discharged to the outside from the air discharge port. and a shielding plate for guiding the exhausted smoke that has passed through the demister to the stored water portion. A flue gas treatment apparatus having a swing plate for allowing stored water to pass through, wherein the stored water above the predetermined water level overflows at a position closer to the air discharge port than the shield plate in the flue gas treatment chamber. An overflow pipe on the upstream side and a horizontal discharge pipe on the downstream side are continuously provided for discharging the accumulated water to the outside of the flue gas treatment apparatus, and a discharge pipe for discharging the stored water at a position lower than the predetermined water level is provided in the middle of the horizontal discharge pipe. and a drain valve is provided in the middle of the drain pipe.

According to the first aspect of the present invention, the impurity components can be reliably removed in the same manner as the flue gas treatment apparatus, and the flue gas from which the impure components have been reliably removed becomes clean air and is exhausted. It is discharged to the outside from the exit. Furthermore, the overflowing stored water can be discharged to the outside through the upstream overflow pipe and the downstream side discharge pipe in order, thereby improving the cleanliness of the water flow path of the water system and simplifying the structure. can be done.

Further, the flue gas treatment apparatus of the second aspect of the present invention is, in the first aspect, provided with a temperature sensor for measuring the temperature of water stored in the bottom of the flue gas treatment chamber, and the temperature measured by the temperature sensor By adjusting the opening degree of the cooling water injection nozzle according to the temperature of the moisture collected, the temperature of the flue gas discharged to the outside from the air outlet, the amount of steam contained in the flue gas, and the steam temperature are adjusted. It is characterized by

According to the second aspect of the present invention, the degree of opening of the cooling water injection nozzle is adjusted in accordance with the temperature of the water measured by the temperature sensor, so that the temperature of the water is appropriately controlled and the amount of flue gas discharged is reduced. Properties can be properly controlled.

A third aspect of the present invention is a flue gas treatment apparatus according to the first or second aspect, characterized in that a check valve is provided at the downstream end of the horizontal discharge pipe.

According to the third aspect of the present invention, since the check valve is installed at the downstream end of the horizontal discharge pipe, cleaning is facilitated.

A fourth aspect of the present invention is a flue gas treatment apparatus according to the first or second aspect, characterized in that the downstream end of the horizontal discharge pipe is water-sealed.

According to the fourth aspect of the present invention, by water-sealing the lower end, which is the tip of the horizontal discharge pipe, it is possible to prevent excess air from being sucked in, and it can be used in place of a check valve. becomes easier.

According to the present invention, in the flue gas treatment apparatus in Patent Document 1, the cleanliness of the water flow path around the water system can be improved and the configuration can be simplified, and the water temperature is properly managed and discharged. It is possible to provide a flue gas treatment device capable of appropriately controlling the characteristics of flue gas.

1 is a front view showing an embodiment of a flue gas treatment apparatus according to the present invention; A plan view of the flue gas treatment apparatus of FIG. Right side view of the flue gas treatment device of FIG. Block diagram of the control system of the flue gas treatment device in FIG.

An embodiment of the present invention will be described below with reference to FIGS. 1 to 4. FIG.

1 to 4 show an embodiment of a flue gas treatment apparatus according to the present invention.

The flue gas treatment apparatus 1 of the present embodiment has, for example, a pedestal 2 arranged above cooking utensils such as a fryer used in a fried food factory or cooking utensils in a kitchen. 1a and a smoke exhaust part 1b are installed. The main body 1a is formed in a rectangular space shape, and an air intake chamber 3 for taking in the smoke discharged from the various cooking utensils is arranged in the center of the front. , 4R are arranged in parallel, and a flue gas delivery passage 30a is provided for guiding the flue gas discharged from both the flue gas treatment chambers 4L, 4R to the flue gas discharge portion 1b. The main body 1a is formed into a rectangular space by a bottom plate 5 installed on the pedestal 2, end panels 8 at the left and right ends, side panels 14 and 15 at the front and rear, and a ceiling panel 13. As shown in FIG. In the air intake chamber 3, a bottom plate 5, a pair of side plates 6 and 7 erected upward from the front and rear sides of the bottom plate 5, and a top plate 9 extending over the upper ends of the side plates 6 and 7 are provided. and are arranged. An intake chamber 3 surrounded by the bottom plate 5, the side plates 6 and 7 and the top plate 9 is formed in the upper part of the mount 2. As shown in FIG. An upper end portion of a smoke exhaust introduction tube 10 is connected to a position corresponding to the intake chamber 3 of the mount 2, and the height of the upper end of the smoke exhaust introducer tube 10 is higher than the bottom plate 5 of the mount 2. It has a predetermined height H1. Further, a cover 11 is detachably attached to the top plate 9 of the intake chamber 3 .

A pair of end panels 12 , 12 are provided on the pedestal 2 from the left and right ends of the top plate 9 of the pedestal 2 to a position lower than the ceiling panel 13 . An intermediate ceiling panel 13a is provided that connects the upper edges of the end panels 12 and extends to the front of the pair of end panels 8,8. The left and right smoke exhaust treatment chambers 4L and 4R are formed in a rectangular shape surrounded by the end panel 12, the intermediate ceiling panel 13a, the pair of side panels 14 and 15, the side plates 6 and 7 of the frame 2 and the bottom plate 5. there is Side panels 14 and 15 of both smoke exhaust treatment chambers 4L and 4R are detachable for cleaning and replacement of internal components.

A first lower partition plate 16 and a second lower partition plate 17 are arranged in parallel with each other at a predetermined distance between the side plate 6 and the rear plate 7 of the frame 2 inside the exhaust gas processing chambers 4L and 4R. , and its lower edge is attached to the bottom plate 5 with a predetermined gap. A rail 18 and a second lower support rail 19 are attached. Further, a first upper support rail 20 and a second upper support rail 21 are provided inside the smoke exhaust treatment chambers 4L and 4R and on the lower surface of the intermediate ceiling panel 13a. 2 lower support rails 19 are mounted correspondingly.

Between the first lower support rail 18 and the first upper support rail 20, a demister 22 formed of a fine stainless steel wire mesh or the like is inserted and taken out from both side surfaces of the flue gas treatment chambers 4L and 4R. Between the second lower support rail 19 and the second upper support rail 21, two grease filters 23, 23 are inserted and removed from both side surfaces of the flue gas treatment chambers 4L, 4R. freely worn.

A vertically extending shielding plate 24 is disposed on the grease filter 23 side of the first lower support rail 18 and the first upper support rail 20 so as to cover one surface of the demister 22 . A swing plate 25 is attached to the lower edge of the shield plate 24 so as to be swingable about its upper end. Further, a gate plate 26 is provided between the intake chamber 3 and the smoke exhaust treatment chambers 4L and 4R, and the gate plate 26 is provided with a plurality of communication holes (not shown). It is

Between the outer end surfaces (left and right end surfaces) of the grease filters 23 of both the smoke exhaust processing chambers 4L and 4R and the intermediate ceiling panel 13a, and between the end surface panel 8 and the ceiling panel 13 facing each other with a gap, both smoke exhaust processing chambers A flue gas delivery passage 30a is formed to guide the flue gas discharged from 4L and 4R to the smoke exhaust portion 1b. A rectifying panel 28 having a plurality of exhaust holes 27, 27, . An air discharge tube 29 is connected. A blower 31 is connected to the air discharge tube 29 as a suction means for discharging internal air and smoke to the outside from an air discharge port 30 .

Further, a cooling water header 32 extending in the longitudinal direction of both the flue gas treatment chambers 4L, 4R is arranged on the ceiling panel 13 directly above the flue gas treatment chambers 4L, 4R. The header 32 is provided with a cooling water injection nozzle 33 which is provided so as to penetrate the flue gas delivery passage 30a and exposes the lower surface side of the intermediate ceiling panel 13a to the cooling water injection nozzle 33 for cooling the demister 22 by injecting cooling water. is set. A cooling water supply pipe 34 is connected to the cooling water header 32 for supplying cooling water of a predetermined pressure to the cooling water header 32. In the middle of the cooling water supply pipe 34, a water supply electromagnetic valve is connected. 35 is provided.

Further, a downwardly extending overflow pipe 38 is connected to a rear side position of the bottom plate 5 of each of the flue gas treatment chambers 4L and 4R corresponding to a position between the grease filter 23 and the end panel 8. ing. A horizontal discharge pipe 39 on the downstream side is connected to the lower end of the overflow pipe 38, which is the downstream end of the overflow pipe 38, so as to extend in front of both the flue gas treatment chambers 4L and 4R. On the bottom plate 5 of both the smoke exhaust treatment chambers 4L and 4R, at the front side position corresponding to the position between the grease filter 23 and the end face panel 8, there is a water level lower than the predetermined water level H1 in the middle of the horizontal discharge pipe 39. A drain pipe 36 for discharging the stored water is provided at a low position H2, and a drain valve 37 is provided in the middle of the drain pipe 36. A check valve 40 is provided downstream of the confluence of the lateral discharge pipe 39 and the drain pipe 36 . Further, instead of using the check valve 40, the downstream end of the lateral discharge pipe 39 may be water-sealed so that the check valve 40 may be omitted. The height H2 of the upper end of the drain pipe 36 is slightly lower than the height H1 of the upper end of the flue gas introduction pipe 10, and the height H3 of the upper end of the overflow pipe 38 is the same as the height H3 of the upper end of the flue gas introduction pipe. 10 and has a height higher than the top height H1.

Furthermore, three water-level electrodes 41 are arranged to hang down at a position corresponding to the lower surface of the ceiling panel 13 of the main body 1a and between the grease filter 23 and the left end panel 8, The lower end height of each of these water level electrodes 41 is lower than the upper end height H2 of the drain pipe 36, higher than the upper end height H1 of the smoke exhaust pipe 10, and higher than the upper end height H3 of the overflow pipe 38. are also set to high heights respectively.

Then, the water supply electromagnetic valve 35 is opened to supply cooling water of a predetermined pressure from the cooling water supply pipe 34 to the cooling water header 32 , and the cooling water is injected from the cooling water injection nozzle 33 to the demister 22 . . The jetted cooling water is stored on the bottom plate 5 of both the smoke exhaust treatment chambers 4L and 4R, flows into the bottom plate 5 of the intake chamber 3 through the communication hole of the gate plate 26, and spreads over the entire bottom plate 5. water is stored. When this water level exceeds the height H2 of the drain pipe 36, the opening of the drain valve 37 or the water supply electromagnetic valve 35 can be adjusted to lower the water level to the height H1 of the exhaust pipe 10. adjusted so that it does not exceed

Furthermore, in the present embodiment, a blocking device 42 is disposed between the central intake chamber 3 and both smoke exhaust processing chambers 4L and 4R. has a blocking wall (not shown) that blocks the air intake chamber 3 from the smoke exhaust processing chambers 4L and 4R when the temperature reaches a predetermined temperature or higher.

Furthermore, in this embodiment, a temperature sensor 43 for measuring the temperature of water stored in the bottoms of both the flue gas treatment chambers 4L and 4R is provided, and the cooling water is By adjusting the opening degree of the injection nozzle 33, the temperature of the flue gas discharged to the outside from the air outlet 30, the amount of steam contained in the flue gas, and the steam temperature are adjusted.

Furthermore, in the present embodiment, as shown in FIG. 4, a control unit 44 is provided to interlock each component. For example, various water level information of the water stored on the bottom plate 5 is obtained from the water level electrode 41, temperature information of the water is obtained from the temperature sensor 43, the rotation speed of the blower 31, cooling by the water supply electromagnetic valve 35 By adjusting the opening degree of the water injection nozzle 33, the temperature of the flue gas discharged from the air outlet 30 to the outside, the amount of steam contained in the flue gas, and the steam temperature are adjusted. Also, when the temperature detected by the temperature sensor 43 reaches a predetermined temperature or higher, the blocking wall 42 is operated. In addition, the check valve 40 is opened when draining water.

Further, in the present embodiment, as the cooling water, in addition to ordinary tap water, water modified so as to have a low oxidation-reduction potential may be used. Such oxidation-reduction water can remove the smell of the flue gas by reacting with the odor components contained in the flue gas. Ordinary tap water or redox water may be mixed with an emulsifier such as liquid smoke or caustic soda, which has a cleaning effect, or a deodorant. When mixed with liquid smoke, the liquid smoke can coat the oil in the flue gas, and when mixed with something having a cleaning effect, the equipment can be cleaned simply by jetting and circulating water. Internal cleaning can be performed. Furthermore, when a deodorant is mixed, the odor of exhaust smoke can be removed, and if necessary, one type or a mixture of a plurality of types can be used.

Next, the operation of this embodiment will be described.

First, as a preparatory step, a command is issued from the control unit 44 to open the water supply solenoid valve 35 to supply cooling water of a predetermined pressure from the cooling water supply pipe 34 to the cooling water header 32, and this cooling water is supplied to the cooling water injection nozzle. Inject from 33. As a result, the insides of both the flue gas treatment chambers 4L and 4R are filled with spray water injected from the cooling water injection nozzles 33, and the demister 22 of the flue gas treatment chamber 4 is cooled by the cooling water and flows down the surface. Covered with cooling water. The jetted cooling water is stored at a predetermined water level on the bottom plates 5 of both the flue gas treatment chambers 4L and 4R. In this state, the lower edges of the first lower partition plate 16, the second lower partition plate 17, and the swing plate 25 are submerged in the cooling water, so that the end panels 8 and the demisters 22 are separated from the flue gas treatment chambers 4L and 4R. space between the demister 22 and the shielding plate 24; space between the shielding plate 24 and the grease filter 23; and space between the grease filter 23 and the end panel 12, respectively.

At the same time, when the blower 31 is operated to apply a negative pressure to the inside of both the flue gas treatment chambers 4L and 4R, the internal air of the intake chamber 3 and both the flue gas treatment chambers 4L and 4R is sucked into water droplets. It is splashed toward the demister 22 together with the cooled cooling water. Further, in this embodiment, the swing plate 25 is attracted toward the blower 31 by the negative pressure of the blower 31 and is swung so that the lower edge of the swing plate 25 is held near the water surface of the stored water. .

When the preparation state is completed in this way, the exhaust gas supplied from the exhaust gas introduction pipe 10 to the intake chamber 3 is transferred from the intake chamber 3 to the gate plate 26 by the suction force of the blower 31 in order to perform the smoke exhaustion process. It flows into both the flue gas treatment chambers 4L and 4R through the communication holes and is scattered toward the demister 22 together with the water in both the flue gas treatment chambers 4L and 4R. As a result, the vaporized oil component contained in the flue gas is condensed by coming into contact with the cooling water while scattering in the form of water droplets, and then collides with the demister 22 to be dispersed, cooled, and condensed. Then, it condenses in contact with the spray water in both the flue gas treatment chambers 4L and 4R, accumulates together with the cooling water at the bottom of both the flue gas treatment chambers 4L and 4R, and passes through the overflow pipe 38 for both flue gas treatment. It is discharged outside the chambers 4L and 4R. At this time, the water stored in the bottom plates 5 of both the flue gas treatment chambers 4L and 4R is drawn toward the overflow pipe 38 by the suction force of the blower 31. Therefore, even if the upper end of the overflow pipe 38 is high, Ejection can be performed properly.

In addition, other impurities contained in the flue gas are captured by water floating in both the flue gas treatment chambers 4L and 4R, and together with cooling water, It is also removed by the filtering action of the demister 22, and discharged to the outside of both the flue gas treatment chambers 4L and 4R4 in the same manner as the condensed oil component. As a result, impurities are removed from the flue gas, which becomes clean air and passes through the demister 22 to the shielding plate 24 side.

Subsequently, the smoke that has passed through the demister 22 passes between the demister 22 and the shielding plate 24 and tries to escape to the grease filter 23 side, but in this embodiment, the swing plate 25 is provided. Therefore, the exhaust smoke is forced to pass through the stored water again and then escapes to the grease filter 23 side. By passing the flue gas through the stored water in this manner, the impure components in the flue gas dissolve in the stored water, and the impure components can be removed more reliably.

Thereafter, the flue gas is sucked by the suction force of the blower 31, and when it passes through the grease filter 23, impurities are further removed, and the flue gas becomes clean air and flows into the flue gas delivery channel 30a, and then The air is discharged to the outside from the air discharge port 30 via the air discharge hole 27 of the rectifying panel 28 and the air discharge tube 29 .

Furthermore, in the water-related system in the lower part of the main body 1a in this embodiment, the water level of the water stored on the bottom plate 5 regularly exceeds the height H3 of the overflow pipe 38, and each time it exceeds the height H3, the overflow pipe 38 More stored water is discharged, and then discharged to the outside of the main body 1a through a lateral discharge pipe 39 connected downstream. Further, when the water level of the stored water exceeds the height H2 of the drain pipe 36, the drain valve 37 is opened by a command from the control unit 44, and the stored water is discharged through the drain pipe 36, and then flows into the horizontal discharge pipe 39 and flows into the main unit. It is discharged to the outside of 1a. Sometimes, the stored water overflowing from the overflow pipe 39 and the stored water draining from the drain pipe 36 are discharged to the outside of the main body 1a at the same time. Since the stored water overflows from the overflow pipe 38 periodically, the stored water can be discharged to the outside through the overflow pipe 38 on the upstream side and the horizontal discharge pipe 39 on the downstream side. The cleanness of the path can be improved and the configuration can be simplified.

Furthermore, upon obtaining temperature information on the water content of the stored water from the temperature sensor 43, the control unit 44 adjusts the rotational speed of the blower 31 and the opening of the cooling water injection nozzle 33 by the water supply electromagnetic valve 35 according to an operating program stored in advance. By adjusting, the temperature of the flue gas discharged to the outside from the air outlet 30, the amount of steam contained in the flue gas, and the steam temperature are adjusted. Since this operation program can be set according to individual specifications in which the wastewater treatment apparatus 1 is installed, versatility is high.

On the other hand, if a fire or the like occurs in kitchen cooking utensils and the internal temperature of the intake chamber 3 rises, the temperature sensor 43 detects the temperature rise, and the control unit 44 issues a command to the blocking device 42 to open the blocking wall. operates to block the air intake chamber 3 and the smoke exhaust processing chamber 4, and the flame generated from the kitchen cooking utensils is blocked by the air intake chamber 3 and reaches the smoke exhaust processing chamber 4. can be reliably prevented. In particular, since water is stored in the bottom of the intake chamber 3, the temperature of the flame can be properly lowered to minimize the spread of fire. It should be noted that the blocking device 42 may be provided with a fuse (not shown) that is melted by heating so that the blocking wall is reliably blocked.

Therefore, in the present embodiment, it is possible to efficiently and reliably remove impure components from flue gas. Impure components can be reliably removed, and adverse effects on the environment can be prevented. In addition, the treated flue gas discharged from the air outlet 30 is sufficiently cooled, and the high-temperature impure components are also cooled. ), there is no accumulation of high-temperature impurities, and there is no danger of inducing fire.

Furthermore, the overflowing stored water can be discharged to the outside through the overflow pipe 38 on the upstream side and the horizontal discharge pipe 39 on the downstream side in order, thereby improving the cleanliness of the water flow path around the water system and simplifying the structure. can be planned.

Furthermore, by adjusting the degree of opening of the cooling water injection nozzle 33 according to the temperature of the moisture measured by the temperature sensor 43, the water temperature can be properly controlled to appropriately control the characteristics of the discharged smoke. can.

Furthermore, since the check valve 40 is installed at the downstream end of the lateral discharge pipe 39, cleaning is facilitated.

Furthermore, by water-sealing the lower end of the horizontal discharge pipe 39, excess air intake can be prevented and the check valve 40 can be replaced, simplifying the structure.

The flue gas treatment apparatus 1 of the present invention can be used to purify any gas containing impure components, even if it is a gas other than the flue gas from a fried food factory or a kitchen.

Further, in the above-described embodiment, a case where one swing plate 25 is provided in each of the flue gas treatment chambers 4L and 4R has been described. may be provided to force the flue gas through the reservoir multiple times, thereby more reliably removing contaminants in the flue gas.

Furthermore, the present invention is not limited to the above embodiments, and can be modified as required.

1 exhaust gas treatment device 2 frame 3 intake chamber 4 exhaust gas treatment chamber 10 exhaust gas introduction pipe 22 demister 23 grease filter 24 shield plate 25 swing plate 26 gate plate 30 air discharge port 31 blower 32 cooling water header 33 cooling water injection nozzle 36 Drain pipe 38 Overflow pipe 39 Horizontal discharge pipe 40 Check valve 42 Shutoff device 43 Temperature sensor 44 Control unit

Claims (4)

A flue gas introduction pipe which communicates with the air discharge port and has a smoke exhaust treatment chamber which stores water at a predetermined water level at the bottom and discharges it, and guides the flue gas into the flue gas treatment chamber at a position higher than the predetermined water level. a demister for removing impure components in the flue gas is provided in the flue gas flow path inside the flue gas treatment chamber, and cooling water is directed to the demister inside the flue gas treatment chamber. A cooling water injection nozzle for injecting cooling water is provided, and suction means is provided for causing the exhaust smoke to pass through the demister and be discharged to the outside from the air discharge port, and the exhaust smoke that has passed through the demister is stored in the water. A smoke exhaust treatment apparatus comprising: a shielding plate for guiding to a water portion; and a swinging plate for forcibly passing the exhaust gas through the stored water by swinging the shielding plate by suction by the suction means. ,
An overflow pipe on the upstream side and a horizontal discharge on the downstream side for overflowing and discharging the stored water that has risen above the predetermined water level to the outside of the flue gas treatment apparatus at a position on the air outlet side of the shielding plate of the flue gas treatment chamber. providing a series of pipes,
A smoke exhaust treatment apparatus, wherein a drain pipe for discharging the stored water at a position lower than the predetermined water level is provided in the middle of the horizontal discharge pipe, and a drain valve is provided in the middle of the drain pipe. A temperature sensor for measuring the temperature of water stored in the bottom of the flue gas treatment chamber is provided, and the degree of opening of the cooling water injection nozzle is adjusted according to the temperature of the water measured by the temperature sensor. 2. A flue gas treatment apparatus according to claim 1, wherein the temperature of the flue gas discharged from the air outlet, the amount of steam contained in the flue gas, and the temperature of the steam are adjusted. 3. A flue gas treatment apparatus according to claim 1, wherein a check valve is provided at the downstream end of said horizontal discharge pipe. 3. The flue gas treatment apparatus according to claim 1, wherein the downstream end of said horizontal discharge pipe is water sealed.

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