JP4683317B2 - Gas bleeder - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a gas extraction device that extracts exhaust gas from exhaust gas containing dust discharged from a combustion facility or the like.
[0002]
[Prior art]
Exhaust gas discharged from combustion facilities such as boilers and waste incinerators contains harmful components such as sulfur oxides and nitrogen oxides. In order to release these exhaust gases to the atmosphere, it is necessary to make them harmless with a flue gas treatment device such as a flue gas desulfurization device or a flue gas denitration device.
[0003]
A general combustion facility will be described with reference to the drawings. FIG. 5 is a conceptual diagram of a general combustion facility.
In the combustion facility 200, the fuel stored in the asphalt tank 201 is heated by the heater 202 and burned by the boiler 203. The burned gas is mixed with dust derived from fuel. The dust-mixed gas is absorbed by the absorption tower 207 through the gas duct 101, the denitration device 204, the preheater 205, and the dust collector 206, and is released from the chimney 208 to the atmosphere.
[0004]
For example, SO ₂ and SO ₃ are included in the gas passing through the gas duct 101. In order to prevent SOx from condensing and corroding the gas duct 101, the gas temperature is maintained at a temperature above the acid dew point. Since the acid dew point decreases when the SO ₃ content decreases, the temperature of the duct of the flue gas treatment apparatus can be lowered. However, the conventional analyzer so could not be measured continuously SO _3, maintained the temperature of the duct by predicting the content of SO ₃ tolerate. Therefore, the temperature of the gas duct 101 has to be increased as compared with the case where the SO ₃ content can be accurately grasped.
Further, the treatment is performed by absorbing SO ₃ into ammonia. When the content of SO ₃ is reduced, the amount of ammonia can be reduced and the ammonia consumption can be reduced. However, the conventional analyzer so could not be measured continuously SO _3, was supplied to the processing apparatus ammonia in anticipation overlook content of SO _3.
[0005]
For this reason, the development of analyzers for sulfur oxides, nitrogen oxides and the like in exhaust gas discharged from combustion facilities and smoke treatment devices has been actively conducted.
One of these analyzers is a SO ₃ gas continuous analyzer. Conventional analysis methods could not measure SO ₃ gas continuously in real time.
Therefore, the applicant has developed a measuring device capable of continuously measuring SO ₃ . In Japanese Patent Application No. 374103, the applicant has a suction pipe for sucking exhaust gas from a flue and a discharge pipe for discharging exhaust gas into the flue, and a cavity having two transparent windows facing each other. A light source for irradiating light into the cavity, a reflection mirror disposed outside the cavity, and for reciprocating the light from the light source into the upper air cavity a plurality of times, and the wavelength of the light after the reciprocation The invention of an SO ₃ concentration meter comprising a calculating means for calculating the SO ₃ concentration in the exhaust gas by spectroscopic analysis of light of 200 nm to 260 nm was filed.
[0006]
With the above configuration, the SO ₃ concentration in the exhaust gas can be measured by reciprocating the light from the light source a plurality of times into the cavity where the exhaust gas is sucked from the flue and performing spectral analysis of the light after the reciprocation.
At this time, a filter is provided in the middle of the suction pipe to remove gas dust. When the exhaust gas contains dust, dust entering the cavity is prevented from scattering light from the light source and causing measurement errors.
[0007]
If the above gas analyzer is used, it is possible to continuously analyze sulfur oxides and nitrogen oxides in the exhaust gas discharged from the combustion equipment and the flue gas treatment device, such as boilers and waste incinerators. The combustion facility can be operated appropriately.
For example, in the case of exhaust gas containing SO ₂ and SO ₃ at the same time, the component ratio of SO ₂ and SO ₃ can be measured continuously, the temperature of the acid dew point can be accurately grasped, and SO ₂ and SO 3 can be accurately measured. Corrosion of the duct can be prevented by appropriately controlling the temperature of the duct so as not to condense with ₃ .
Further, if the amount of SO ₃ is continuously measured, the amount of ammonia for the treatment of SO ₃ can be appropriately managed.
[0008]
[Problems to be solved by the invention]
By the way, dust having catalytic ability may be mixed in the exhaust gas.
In the case of a gas analyzer using a conventional filter, dust is captured by a filter of a gas bleeder that bleeds gas. Dust remains clogged in the filter. When the dust has catalytic ability for the component to be analyzed, the component of the gas that has passed through the filter changes. When the gas component changes, there is a problem that the measurement data of the gas analyzer is different from the gas component that actually passes through the gas duct.
For example, vanadium pentoxide is one of the main components of dust. Vanadium pentoxide has a catalytic ability to generate SO ₃ by reacting SO ₂ and O ₂ at a predetermined temperature. When vanadium pentoxide dust is trapped in the eyes of a filter provided in the middle of the suction pipe, when SO ₂ and SO ₃ mixed gas passes through the filter, a part of SO ₂ is O _2. since the reaction to become sO ₃ and the concentration of sO ₃ in the gas increases. The ratio of SO ₂ and SO ₃ which analyzed the gas analyzer becomes different from the true ratio of SO ₂ and SO ₃ in the gas flowing through the gas duct.
As in this example, if the measurement data of the gas analyzer cannot analyze the true gas component of the gas passing through the gas duct, it is possible to appropriately operate the combustion equipment such as the boiler and the garbage incinerator as described above. become unable.
[0009]
The present invention has been devised in view of the problems described above, and instead of the conventional gas extraction device, dust contained in the gas is continuously removed and dust having catalytic ability is mixed. However, an object of the present invention is to provide a gas extraction device that can extract gas without changing the gas component.
[0010]
[Means for Solving the Problems]
In order to achieve the above object, a gas bleeder for extracting sample gas from a gas duct through which a gas mixed with dust flows according to the present invention has a gas cylinder provided upright and a gas provided in an upper part of the gas chamber. A gas chamber housing having an inflow gas inflow port and a gas outflow port for gas outflow provided at an upper portion of the gas chamber;
A gas chamber partition wall that partitions the upper part of the gas chamber forward and backward between the gas inlet and the gas outlet.
[0011]
With the configuration of the present invention described above, the gas chamber housing has a gas chamber, a gas inlet, and a gas outlet, and the gas chamber partition wall is disposed between the gas inlet and the gas outlet at the upper part of the gas chamber. Gas enters the gas inlet and exits from the upper part of the gas chamber, so that the gas descends along the gas chamber partition wall and is bent sharply at the lower end of the gas chamber partition wall. , The dust in the gas is shaken off by centrifugal force, accumulates under the gas chamber, the gas with less dust comes out from the gas outlet, and the gas with less dust can be obtained.
[0012]
Furthermore, the gas bleeder according to the present invention includes a plurality of the gas chambers in which the gas chamber housing is arranged in the front-rear direction, the gas inlet at the foremost end communicates with a gas duct, and The gas inlet and the gas outlet are in communication with each other, and the gas outlet at the rearmost end is in communication with a sample gas line.
According to the configuration of the present invention, dust is removed from the gas while the gas sequentially passes through the aligned gas chambers, and a gas with less dust can be obtained.
[0013]
Furthermore, the gas bleeder according to the present invention includes a gas flow baffle plate that is provided in the gas chamber below the lower end portion of the gas chamber partition wall and is a plate that obstructs the gas flow.
With the configuration of the present invention, the gas flow baffle plate obstructs the gas flow in the gas chamber below the lower end, so that the gas does not directly contact the dust accumulated and the dust has a catalytic ability. Does not change the gas component.
[0014]
Further, in the gas bleeder according to the present invention, the gas flow baffle plate has a partition plate that is uniformly provided with openings sufficiently larger than dust and partitions the gas chamber vertically.
With the above-described configuration of the present invention, the partition plate provided with openings sufficiently larger than the dust partitions the gas chamber vertically, so that the dust passes through the openings and accumulates under the partition plate. Is not affected by the flow of gas and does not come into direct contact with the accumulated dust.
[0015]
Furthermore, in the gas bleeder according to the present invention, the gas flow baffle plate has a baffle plate that is a bowl-shaped plate protruding inward from the wall of the gas chamber.
According to the configuration of the present invention, the baffle plate protrudes in a bowl shape from the wall of the gas chamber into the gas chamber, so that dust passes through the gap of the baffle plate and accumulates under the baffle plate, and the gas under the baffle plate is It is not affected by the flow and does not come into direct contact with the accumulated dust.
[0016]
Furthermore, the gas bleeder according to the present invention includes a dust discharge line having a pipe communicating with the lower part of the gas chamber and an on-off valve provided in the middle of the pipe.
According to the configuration of the present invention, when the opening / closing valve of the dust discharge line is opened, dust accumulated under the gas chamber can be discharged to the outside.
[0017]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, a preferred first embodiment of the present invention will be described with reference to the drawings. In each figure, common portions are denoted by the same reference numerals, and redundant description is omitted.
[0018]
The structure of the gas analyzer with a gas bleeder according to the first embodiment of the present invention will be described. FIG. 1 is a conceptual diagram of a first embodiment of the present invention. FIG. 2 is a perspective view of the first embodiment of the present invention. FIG. 4 is a conceptual diagram of a gas analyzer provided with a gas bleeder according to an embodiment of the present invention.
[0019]
First, the structure of the gas analyzer will be briefly described. The gas analyzer 100 includes a gas extraction device 102, a preheating temperature controller 104, a preheater 105, a cavity 106, a circulation pump 107, a light source 108, a reflection mirror 109, a spectroscope 110, a light detection element 111, a calculator 112, and a heater. 113 and a temperature controller 114.
[0020]
The gas bleeder 102 is a device that bleeds the gas 1 containing dust flowing in the gas duct 101, removes the dust from the bleed gas 2, and sends the sampling gas 4 to the preheater 105. The preheater 105 is a device that is controlled by the preheat controller 104 and preheats the sampling gas 4 to a temperature necessary for measurement, and sends the preheated gas to the cavity 106. The cavity 106 is a room for sealing a gas having a predetermined temperature, and has two transparent windows facing each other. The circulation pump 107 allows the extracted sampling gas to continuously pass through the cavity 106. The light source 108 is for irradiating light of a desired frequency into the cavity 106. The reflection mirror 109 is a mirror for reciprocating light from the light source 108 a plurality of times in the cavity 106, and is provided facing the transparent window. The spectroscope 110 is a device that splits incident light. The light detection element 111 is an element that converts the dispersed light into an electric signal, and is provided inside the spectrometer 110. The calculator 112 is a device that calculates the concentration of the gas component (for example, the concentration of SO ₃ ) based on the electrical signal output from the light detection element 111. The heater 113 is a device that is controlled by the temperature controller 114 and maintains the gas temperature in the cavity 106 at a desired temperature.
[0021]
Next, the operation of the gas analyzer will be briefly described. The gas 1 containing dust flows through the gas duct 101. The gas 1 is extracted by the gas extraction device 102 and becomes the sample gas 4 from which dust is removed. The sample gas 4 is preheated to a predetermined temperature by the preheater 105 and enters the cavity 106. The light from the light source 108 passes through the cavity 106 and is split by the spectroscope 110. The split light is converted into an electric signal by the light detection element 111. The calculator 112 calculates a gas component from the electrical signal. The sample gas 4 is returned to the gas duct 101 by the circulation pump 107.
[0022]
Next, the gas bleeder according to the first embodiment will be described in detail.
The gas bleeder according to the first embodiment is a device that bleeds sample gas from a gas duct through which dust-mixed gas flows, and includes a plurality of aligned gas chambers 11a, 11b, 11c, 11d, 11e, and 11f (11 And a gas chamber partition wall 16a, 16b, 16c, 16d, 16e, 16f (represented by 16) for each gas chamber and a partition plate (gas flow baffle plate) for each gas chamber. 18a, 18b, 18c, 18d, 18e, 18f (represented by 18) and a dust discharge line 30.
[0023]
The gas chamber 11 of the gas chamber housing 10 is configured to allow gas to flow in, to remove the dust in the gas while flowing the gas therein, and to flow out the gas with reduced dust, and has an upright substantially cylindrical shape. For convenience of explanation, the side into which gas flows in is assumed to be the front, and the side from which gas flows out is assumed to be the rear. The illustrated gas chamber is a hexahedron and is surrounded by a front plate, a rear plate, two side plates, a top plate, and a bottom plate. A gas inlet through which gas flows is provided in the upper part of the front plate of the gas chamber. A gas outlet through which gas flows out is provided at the upper part of the rear plate of the gas chamber.
[0024]
The gas chamber partition wall 16 is formed by leaving the gas chamber only with a gap between the lower end portions 17a, 17b, 17c, 17d, 17e, 17f (represented by 17) of the gas chamber partition wall and the bottom plate of the gas chamber 11. It is a wall that partitions the front and rear. The front part of the gas chamber partitioned by the gas chamber partition wall 16 is referred to as front gas flow paths 14a, 14b, 14c, 14d, 14e, and 14f (represented by 14). The rear part of the gas chamber partitioned by the gas chamber partition wall 16 is referred to as rear gas flow paths 15a, 15b, 15c, 15d, 15e, 15f (represented by 15). The gas inlet communicates with the front gas channel, and the gas outlet communicates with the rear gas channel.
[0025]
The partition plate 18 is a plate in which openings (for example, round holes and rectangular holes) that are sufficiently larger than dust are uniformly provided, and the gas chamber below the lower end portion of the gas chamber partition wall is vertically partitioned. Is provided. It is preferable that the total area of the opening of the partition plate 18 is smaller than the channel cross-sectional area of the front gas channel 14.
[0026]
The plurality of gas chambers 11 are aligned in the front-rear direction with the gas inlet 12 and the gas outlet 13 facing each other. The gas bleeder shown in the figure has six gas chambers 11 arranged, and from the front side, a first gas chamber 11a, a second gas chamber 11b, a third gas chamber 11c, a fourth gas chamber 11d, They are called the fifth gas chamber 11e and the sixth gas chamber 11f. The gas inlet 12 and the gas outlet 13 of the adjacent gas chamber 11 communicate with each other. In the illustrated gas bleeder, the rear plate of the gas chamber constituting the gas chamber 11 is also used as the front plate of the adjacent gas chamber. The frontmost gas inlet 12a communicates with the gas duct, and the rearmost gas outlet 13f communicates with the sample gas line.
[0027]
The dust discharge line 30 is a pipe for discharging dust accumulated under the gas chamber. The dust discharge ports 19a, 19b, 19c, 19d, 19e, and 19f (represented by 19) provided at the lower end of the gas chamber. )) And an on-off valve 32 provided in the middle of the pipe. The pipe communicates with the suction side of the circulation pump 197 of the gas analyzer 100. The on-off valve 32 is normally closed.
[0028]
The operation of the gas bleeder according to the first embodiment will be described below.
The gas 1 in the duct 101 enters the gas inlet 12a of the first gas chamber 11a of the gas extraction device 102 through the gas introduction pipe 60. Gas 1 flows downward through the front gas flow path 14a of the first gas chamber 11a. When the gas 1 reaches the lower end 17a of the gas chamber partition wall 16a, the gas 1 suddenly changes its direction upward and flows to the rear gas flow path 15a. At this time, dust having a specific gravity greater than that of the gas is shaken down by centrifugal force. Dust falls down from the opening of the partition plate 18a. On the lower side of the partition plate 18a, it is difficult to be influenced by the flow of the gas 1 in the front gas flow path 14a, and the gas stays there. Once the dust enters the lower part of the partition plate 18a, it does not return to the top but accumulates below. The gas flowing through the gas chamber does not come into contact with dust accumulated below the partition plate 18a.
The gas ascends in the rear gas flow path 15a and flows out from the gas outlet 13a of the first gas chamber 11a. Next, the gas flows into the second gas chamber 11b and flows through the third, fourth, fifth and sixth gas chambers sequentially while receiving the same action and reducing dust. The gas exits the gas outlet 13f of the sixth gas chamber 11f and is sent to the next step (preheating temperature controller 104) of the gas analyzer 100. The gas that has passed through the gas analyzer 100 returns to the gas duct 101 via the gas return pipe 70.
When the opening / closing valve 32 of the dust discharge line 30 is opened, the accumulated dust is discharged out of the gas chamber and returned to the gas duct 101.
[0029]
Next, the structure of the gas analyzer with a gas bleeder according to the second embodiment of the present invention will be described. Since the structure and operation other than the gas bleeder are the same, only different parts will be described. The gas bleeder according to the second embodiment of the present invention will be described in detail. FIG. 3 is a perspective view of the second embodiment of the present invention.
[0030]
Since only the structure of the gas flow baffle is the same, only the differences will be described. The front baffle plates 20a, 20b, 20c, 20d, 20e, and 20f (a gas flow baffle plate) are bowl-shaped plates protruding from the gas chamber wall below the lower end portion 17 of the gas chamber partition wall 16 into the gas chamber. 20) and rear baffle plates 21a, 21b, 21c, 21d, 21e, 21f (represented by 21). The front baffle plate 20 protrudes from the inner wall of the front plate of the gas chamber below the lower end 17 of the gas chamber partition wall 16 into the gas chamber. The rear baffle plate 21 protrudes from the inner wall of the rear plate of the gas chamber below the lower end portion 17 of the gas chamber partition wall 16 into the gas chamber.
[0031]
The operation of the gas bleeder according to the second embodiment will be described.
The gas 1 in the duct 101 enters the gas inlet of the gas extraction device 10 through the extraction pipe 60. Gas 1 flows downward through the front gas flow path 14a of the first gas chamber 11a. When the gas 1 reaches the lower end 17a of the gas chamber partition wall 16a, the gas 1 suddenly changes its direction upward and flows to the rear gas flow path 15a. At this time, dust having a specific gravity greater than that of the gas is shaken down by centrifugal force. Dust falls down from the gap between the front baffle plate 20a and the rear baffle plate 21a. Under the front baffle plate 20a and the rear baffle plate 21a, gas is not easily affected by the flow of the gas 1 in the front gas flow path 14a, and the gas stays there. Once the dust enters the lower part of the front baffle plate 20 and the rear baffle plate 21, the dust does not return to the top but accumulates below. The gas flowing through the gas chamber does not come into contact with dust accumulated below the front baffle plate 20 and the rear baffle plate 21.
The gas rises in the rear gas flow path 15a and flows out from the gas outlet 13a of the gas chamber 11a. Next, the gas flows into the second gas chamber 11b and flows through the third, fourth, fifth and sixth gas chambers sequentially while receiving the same action and reducing dust. The gas is discharged from the gas outlet 13f of the sixth gas chamber 11f to the next process (preheating temperature controller 104) of the gas analyzer 100. The gas that has passed through the gas analyzer 100 returns to the gas duct 101 via the gas return pipe 70.
When the opening / closing valve 32 of the dust discharge line 30 is opened, the accumulated dust is discharged out of the gas chamber and returned to the gas duct 101.
[0032]
If the gas bleeder of the above-mentioned embodiment is used, the gas from which dust has been removed can be sent to the gas analyzer, and the gas analyzer can perform highly accurate gas analysis.
Further, since the gas flowing through the gas bleeder does not directly contact the accumulated dust, gas analysis can be performed without changing the gas components even when the dust has catalytic ability.
Further, accumulated dust can be discharged periodically.
In addition, since the structure is simple, no large pressure loss occurs and less pump power is required.
Further, since the structure is simple and there are no movable parts, it can be manufactured without selecting a material, and for example, it can be made of a material that does not affect the gas component such as glass at all.
[0033]
The present invention is not limited to the embodiments described above, and various modifications can be made without departing from the scope of the invention.
Although the shape of the gas chamber is a hexahedron, it is not limited to this.
In addition, although it has been described that the gas chambers arranged in the front-rear direction also serve as the front and rear plates, the present invention is not limited to this. For example, each gas chamber may have an independent gas chamber housing.
Moreover, although the on-off valve has been described as being normally closed, the present invention is not limited to this. For example, the on-off valve may be always open and the flow rate may be controlled by an orifice or the like.
Further, the number of gas chambers is six, but the number is not limited to this, and the number may be selected so as to obtain a desired performance. For example, one may be used.
Further, although the cross-sectional area of the front gas flow path and the rear gas flow path is not mentioned, for example, the flow cross-sectional area of the front gas flow path is a cross-sectional area that can obtain a desired flow velocity, and the rear gas flow path The cross-sectional area may be a flow rate at which dust is not blown up.
[0034]
【The invention's effect】
As described above, the gas extraction device for extracting the sample gas from the gas duct through which the dust-mixed gas of the present invention flows has the following effects due to its configuration.
The gas descends along the gas chamber partition wall, is bent sharply at the lower end of the gas chamber partition wall, rises along the gas chamber partition wall, and dust in the gas is shaken off by centrifugal force. The gas with less dust collected from the gas exits from the gas outlet, and the gas with less dust can be obtained.
In addition, while the gas sequentially passes through the plurality of aligned gas chambers, dust is removed from the gas, and a gas with less dust can be obtained.
In addition, since the gas flow baffle plate obstructs the gas flow in the gas chamber below the lower end, the gas component is not directly contacted with the accumulated dust, and the gas component is removed even if the dust has catalytic ability. Do not change.
Further, the dust passes through the opening and accumulates under the partition plate, and the bottom of the partition plate is not affected by the flow of gas and does not directly contact the dust accumulated with gas.
Further, the dust passes through the gap of the baffle plate and accumulates under the baffle plate, and the bottom of the baffle plate is not affected by the flow of gas and does not directly contact the dust accumulated with gas.
Moreover, if the open / close valve of the dust discharge line is opened, dust accumulated under the gas chamber can be discharged to the outside.
Therefore, it is possible to provide a gas bleeder that can continuously remove dust contained in gas and bleed gas without changing the gas component even when dust having catalytic ability is mixed.
[0035]
[Brief description of the drawings]
FIG. 1 is a conceptual diagram of a first embodiment of the present invention.
FIG. 2 is a perspective view of the first embodiment of the present invention.
FIG. 3 is a perspective view of a second embodiment of the present invention.
FIG. 4 is a conceptual diagram of a gas analyzer provided with an embodiment of the present invention.
FIG. 5 is a conceptual diagram of an example of combustion equipment.
[Explanation of symbols]
1 Gas 2 Gas 3 Gas 4 Sample Gas 5 Dust 10 Gas Chamber Housing 11 Gas Chamber 12 Gas Inlet 13 Gas Outlet 14 Front Gas Channel 15 Rear Gas Channel 16 Gas Chamber Partition Wall 17 Lower End of Gas Chamber Partition Wall 18 Partition plate 19 Dust discharge port 20 Front baffle plate 21 Rear baffle plate 30 Dust discharge line 31 Pipe 32 On-off valve 60 Gas introduction pipe 70 Gas return pipe 100 Gas analyzer 101 Gas duct 102 Gas bleeder 103 Sample gas duct 104 Preheat controller DESCRIPTION OF SYMBOLS 105 Preheater 106 Cavity 107 Circulation pump 108 Light source 109 Reflection mirror 110 Spectroscope 111 Photodetection element 112 Calculator 113 Heater 114 Temperature controller 200 Combustion device 201 Asphalt tank 202 Heater 203 Boiler 204 Denitration device 205 Preheater 206 Dust collection 207 Absorption tower 208 Chimney

Claims (6)

A gas extraction device for extracting a sample gas from a gas duct through which a gas mixed with dust flows , removing dust from the gas, and then sending the gas to a gas analyzer for determining the concentration of a gas component ,
The gas analyzer includes: a cavity through which the gas passes; a light source that irradiates light into the cavity; a spectrometer that splits the light that has passed through the cavity; A light detection element for converting into a signal, and a calculator for calculating the concentration of the gas component based on the electrical signal,
The dust includes one having a catalytic ability to change the gas component,
A gas chamber housing having a gas chamber having an upright shape , a gas inlet provided in the upper part of the gas chamber, and a gas outlet provided in the upper part of the gas chamber; A gas chamber partition wall that partitions the upper part of the chamber forward and backward between the gas inlet and the gas outlet ;
A gas flow baffle plate that is provided in the gas chamber below the lower end of the gas chamber partition wall and is a plate that obstructs the gas flow;
The gas flow baffle plate forms an opening that communicates the gas chamber above the gas flow baffle plate and the gas chamber below the gas flow baffle plate, so that the gas chamber below the gas flow baffle plate is formed. The gas bleeder according to claim 1, wherein the dust is accumulated in the gas chamber so that an influence of a gas flow in the upper gas chamber is not easily received in the lower gas chamber . The gas chamber housing has a plurality of the gas chambers arranged in the front-rear direction, the gas inlet at the foremost end communicates with a gas duct, and the gas inlet and the gas outlet of the gas chamber adjacent to the front and rear are communicating, gas extraction device according to claim 1, wherein the gas outlet of the last end is characterized in that it lines and communication of the sample gas. 3. The gas bleeder according to claim 1, wherein the gas flow baffle plate has a partition plate that is uniformly provided with an opening larger than dust and partitions the gas chamber vertically. 3. The gas bleeder according to claim 1, wherein the gas flow baffle plate has a baffle plate that is a bowl-shaped plate protruding inward from a wall of the gas chamber. The gas bleeder according to any one of claims 1 to 4, further comprising a dust discharge line having a pipe communicating with a lower portion of the gas chamber and an on-off valve provided in the middle of the pipe. Two bowl-shaped plates projecting from the two walls of the gas chamber sandwiching the gas chamber partition wall to the gas chamber partition wall side are provided as the gas flow baffle plates, and the two bowl-shaped plates are provided. The gas bleeder according to claim 1, wherein the plate has the opening formed therebetween.

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