KR20160084258A - A duct filtering device for removing fine dust trailing electric precipitator - Google Patents

Abstract

The present invention relates to a filtering apparatus inside a duct for removing fine dust on a rear side of an electric precipitator. More particularly, the filtering apparatus is installed on a rear side of an electric precipitator (EP) at a power plant or an industrial plant site to filter non-treated fine dust in flue gas emitted from the EP. The filtering apparatus inside a duct (100) comprises: a duct system composition part (110); a filter part (120); a filter driving part (130); a filter drum part (140); a fine dust outlet part (150); and a filter exhaustion part (160).

Description

TECHNICAL FIELD [0001] The present invention relates to a duct filtering apparatus for removing fine dust at a rear end of an electrostatic dust precipitator,

The present invention relates to an in-duct filtering apparatus for removing particulate matter downstream of an electrostatic precipitator, and more particularly, to an apparatus for filtering flue gas discharged from an electrostatic dust precipitator installed downstream of an electrostatic precipitator (EP) The present invention relates to an in-duct filtering apparatus for removing fine particulate matter downstream of an electrostatic precipitator, which can filter and effectively filter untreated ultrafine dust contained in an electrostatic precipitator.

In the energy-consuming industries such as power plants or industrial plant sites, various combustion facilities such as power generation boilers and incineration boilers are operated to secure necessary energy such as electricity or steam. Air pollution prevention facilities for removing air pollutants such as dust, sulfur oxides, and nitrogen oxides generated in the combustion process are inevitably installed and operated at the rear end of such a combustion facility. Particularly, in the downstream of the combustion facility, an electrostatic dust precipitator EP is installed during the flow of the exhaust gas to the stack to remove the dust contained in the exhaust gas discharged from the power generation boiler or the incineration boiler, And the process of removing the waste.

Generally, the electrostatic precipitator uses a corona discharge to charge a particle in an exhaust gas contained therein and separates the charged particle from the exhaust gas by an electrostatic force, thereby collecting a large amount of dust, soot and the like contained in the exhaust gas discharged from the combustion facility And removed. The principle of such an electrostatic precipitator is that the dust collecting electrode of the casing is made negative, a positive DC high voltage is applied to the discharge line at the center of the casing, and then exhaust gas containing dust is sent to the casing, So that the exhaust gas flowing into the upper portion of the casing is cleanly purified and discharged. A typical electrostatic precipitator is composed of a wet or dry dust collector which removes the dust accumulated on the dust collector by water or mechanically shocks the dust collector.

According to the current Air Pollution Control Law enforcement regulations, the power plant installed before 30 June 2001 is pm 30, the power plant installed after that date is pm 20, and the number of self-management standards without dust emission charge is pm 9 . In most of the power generation facilities industry, it seems that it operates well with low TSP emission concentration compared to the standard value of pm 20. However, when the composition ratio of exhaust dust is examined, fine dust having a purity of less than 2.5 is 67% 24%, and the particles larger than pm10 are only about 9%. Therefore, although low TSP emission levels are maintained, about 91% of the dust is fine dust that is harmful to human body. Usually pm10 is fine dust and pm2.5 is ultrafine dust. Ultrafine dust is not discharged when it enters the lungs. It adsorbs to the lungs and causes pneumoconiosis. When it enters the brain, it blocks blood vessels and causes stroke. There is a problem that has a good effect. Korean Patent Registration No. 10-1320293 discloses a dust collecting device as a prior art document.

SUMMARY OF THE INVENTION The present invention has been proposed in order to solve the above-mentioned problems of the conventional methods, and it is an object of the present invention to provide a filter device in which a roll curtain type filter installed at the rear end of an electrostatic precipitator (EP) Thereby enabling effective filtration of the untreated fine dust contained in flue gas discharged from the electrostatic dust precipitator and enabling effective replacement and maintenance even during unit operation of the power generation facility. It is an object of the present invention to provide an in-duct filtering apparatus for dust removal.

In addition, the present invention improves the differential pressure reduction and collection efficiency by reducing the wind velocity of the flue gas through the enlargement of the duct cross-sectional area of the duct system constituent part and securing the sectional area of the filter using the front and rear pulleys, and when the pressure difference occurs on the surface of the roll curtain type filter A new filter surface is applied by moving to the upper or lower side and the used filter surface is regenerated by cleaning to enable repeated use and the tension of the roll curtain type filter by adjusting the position change of the pulley using the cylinder Another object of the present invention is to provide an in-duct filtering device for removing fine particulate at the rear end of an electrostatic precipitator, which can improve the filtration efficiency of the filter performance and extend the service life as the adjustment becomes possible.

In addition, the present invention effectively removes fine dust that has been exhausted from the collected fine dust discharging portion by using a vacuum pump, a collecting container or a conveyor, and is capable of effectively collecting fine dust, Another object of the present invention is to provide an in-duct filtering device for removing particulate matter downstream of an electrostatic precipitator so that filter cleaning can be effectively implemented by injecting compressed air or steam so that the phenomenon can be solved.

In accordance with an aspect of the present invention, there is provided an in-duct filtering apparatus for removing dust from a rear end of an electrostatic precipitator,

An electrostatic precipitator for filtering untreated ultrafine dust contained in a flue gas discharged from an electrostatic precipitator and installed downstream of an electrostatic precipitator (EP) at a power plant or an industrial plant site. As a filtering device,

Sectional area enlargement duct having an inlet duct and an outlet duct formed on both sides in the vertical or horizontal direction through which the flue gas flows and an inner space having an increased sectional area between the inlet duct and the outlet duct, And a duct system constituting a lower duct chamber and an upper duct chamber communicating with a lower portion of the duct system,

A roll curtain type filter is staggered over the upper duct chamber and the cross sectional enlargement duct and the lower duct chamber of the duct system constituent part so that untreated ultra fine dust contained in the flue gas flowing through the inlet duct A filter unit for filtering and filtering;

A filter driving unit connecting the roll curtain type filter of the filter unit so as to be disposed in a zigzag manner and driving the roll curtain type filter to move up and down;

A filter drum unit for driving the roll curtain type filter so as to wind the roll curtain type filter when the roll curtain type filter is moved up and down;

A dust collecting unit connected to the lower duct chamber of the duct system constituting unit to communicate with the lower duct chamber and collecting ultrafine dust filtered by the roll curtain type filter; And

And a filter exhausting part for performing filter cleaning by spraying compressed air or steam so as to solve the clogging phenomenon during use of the roll curtain type filter located above the collected fine dust discharge part .

Preferably, the duct system component comprises:

The upper duct chamber and the lower duct chamber, which are connected to the upper and lower portions of the cross-sectional area enlarging duct, respectively, are partially opened by a labyrinth sealing member to prevent leakage of ultrafine dust. So that the sealing of the filter can be maintained.

Preferably, the filter unit includes:

The roll curtain type filter is constituted by a roll curtain type filter which enlarges the surface area through a bent shape arranged in a zigzag shape. The roll curtain type filter can be made of a material which is specially manufactured to reduce the ventilation resistance and to easily move up and down, have.

More preferably, the roll curtain type filter includes:

When a differential pressure is generated on the filter surface, the filter surface is moved to the upper portion or the lower portion to apply a new filter surface, and the used filter surface is regenerated by cleaning and can be used repeatedly.

Preferably, the filter driver includes:

A plurality of shafts wound around the roll curtain type filter so as to be arranged in a zigzag shape are arranged to pass through the cross-sectional area enlarging duct, and the bearings are exposed to both sides of the plurality of shafts, And a belt is connected between the pulleys. Cylinders are respectively installed on the pulleys on the inlet duct side, and a sprocket of a motor is connected to the pulleys positioned at the lowermost end of the pulleys. And connected to the chain so as to be supplied with the filter drive force of the motor.

More preferably,

And to adjust the tension of the roll curtain type filter by operating to adjust the position change of the pulley.

Preferably, the filter drum portion includes:

A pair of drums connected and fixed to both ends of the roll curtain type filter are disposed in the upper duct chamber and the lower duct chamber and a shaft is connected to one of the pair of drums to be exposed to the outside, And a chain coupling coupled to the gear motor is disposed at the shaft connecting portion of the shaft.

Preferably, the collected fine dust discharging portion includes:

A second chute having a shape corresponding to the lower portion of the first chute is connected to the lower portion of the first chute, and the second chute is connected to the lower portion of the second chute, And a third chute may be connected to a lower portion of the conveyor.

More preferably, the collected fine dust discharging portion includes:

A vacuum pump and a dust collector are installed at the rear end of the third sucker so that the dust trapping fine dust can be collected using the vacuum pump or the dust collector.

Preferably, the filter discharge portion includes:

A diaphragm valve and a diaphragm valve are disposed on an upper portion of a roll curtain type filter located on an upper portion of a fine dust discharging portion where a flow pipe passing through the lower duct chamber is collected, The speed, temperature and pressure of the denitration medium including the instrument air, gas, and hot steam supplied from the outside to the rear end of the flange, And a regulator for regulating the temperature of the liquid.

According to the in-duct filtering apparatus for removing fine particulate at the rear end of the electrostatic dust precipitator proposed in the present invention, a filter apparatus in which a roll curtain type filter installed at the downstream end of an electrostatic precipitator (EP) It is possible to filter untreated ultrafine dust contained in flue gas discharged from the electrostatic dust precipitator and to filter the effluent ultrafine dust effectively so that it is always possible to replace and maintain the unit even during the operation of the unit of the power generation facility.

According to the present invention, the reduction of the pressure difference and the collection efficiency are increased by reducing the wind velocity of the flue gas through the enlargement of the duct cross-sectional area of the duct system constituent part and securing the sectional area of the filter using the front and rear pulleys, The new filter surface is applied to the top or bottom of the tank, and the used filter surface is regenerated by cleaning and used repeatedly. The roll curtain type filter It is possible to improve the filtering efficiency of the filter performance and increase the life span as the tension adjustment becomes possible.

In addition, the present invention can effectively collect the dust-removing fine dust through the collected fine dust discharging portion utilizing the vacuum pump or the dust collector, and can prevent the clogging phenomenon during use of the roll curtain type filter in the filter dust- The filter cleaning can be effectively implemented by injecting compressed air or steam.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a front view of an in-duct filtering apparatus for removing particulate matter downstream of an electrostatic precipitator according to an embodiment of the present invention; FIG.
BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an electrostatic precipitator,
3 is a diagram illustrating a right side view of an in-duct filtering apparatus for removing fine dust at the rear end of an electrostatic precipitator according to an embodiment of the present invention.
4 is a perspective view illustrating a projection perspective view of an in-duct filtering apparatus for removing fine particulate at the rear end of an electrostatic precipitator according to an embodiment of the present invention.
[0001] The present invention relates to an in-duct filtering apparatus for removing dust from an electrostatic precipitator, and more particularly,
6 is a cross-sectional view illustrating a projected perspective view of an in-duct filtering apparatus for removing fine dust at the rear end of an electrostatic precipitator according to an embodiment of the present invention.
FIG. 7 is an exploded perspective view of a duct system constituent part of an in-duct filtering apparatus for removing fine dust at the rear end of an electrostatic precipitator according to an embodiment of the present invention; FIG.
FIG. 8 is a perspective view of a filter unit of an in-duct filtering apparatus for removing fine particulate at the rear end of an electrostatic precipitator according to an embodiment of the present invention; FIG.
FIG. 9 is a perspective view of a filter driving unit of an in-duct filtering apparatus for removing fine dust at the rear end of an electrostatic precipitator according to an embodiment of the present invention; FIG.
FIG. 10 is a perspective view of a filter drum of an in-duct filtering apparatus for removing fine dust at the rear end of an electrostatic precipitator according to an embodiment of the present invention; FIG.
11 is a view illustrating the configuration of a collected fine dust discharging portion of an in-duct filtering device for removing fine dust at the rear end of an electrostatic precipitator according to an embodiment of the present invention.
FIG. 12 is a perspective view of a filter exhaustion part of an in-duct filtering device for removing particulate matter downstream of an electrostatic precipitator according to an embodiment of the present invention; FIG.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings, in order that those skilled in the art can easily carry out the present invention. In the following detailed description of the preferred embodiments of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear. In the drawings, like reference numerals are used throughout the drawings.

In addition, in the entire specification, when a part is referred to as being 'connected' to another part, it may be referred to as 'indirectly connected' not only with 'directly connected' . Also, to "include" an element means that it may include other elements, rather than excluding other elements, unless specifically stated otherwise.

FIG. 1 is a front view of an in-duct filtering apparatus for removing fine dust at the rear end of an electrostatic precipitator according to an embodiment of the present invention. FIG. 2 is a cross- FIG. 3 is a view illustrating a right side view of the in-duct filtering device for removing fine particulate at the rear end of the electrostatic precipitator according to the embodiment of the present invention, and FIG. 4 FIG. 5 is a perspective view of a dust collecting apparatus according to an embodiment of the present invention. FIG. 5 is a perspective view of a dust collecting apparatus according to an embodiment of the present invention. FIG. 6 is a cross-sectional view illustrating the structure of the electrostatic precipitator downstream of the electrostatic precipitator according to the embodiment of the present invention. Sectional plan view of the projection perspective view of the filtering device in the duct. 1 to 6, an in-duct filtering apparatus 100 for removing dust from a rear end of an electrostatic precipitator according to an exemplary embodiment of the present invention includes a duct system unit 110, a filter unit 120, The filter driving unit 130, the filter drum unit 140, the collected fine dust discharging unit 150, and the filter discharging unit 160.

The duct system constructing unit 110 is a duct structure installed at a downstream end of an electric dust collector EP of a power generating facility or an industrial plant site. The duct system constructing unit 110 includes a duct system constructing unit 110, a flue gas containing untreated ultra- Sectional area enlargement duct 113 having an inlet duct 111 and an outlet duct 112 formed on both sides in the vertical or horizontal direction and an inner space having an increased sectional area between the inlet duct 111 and the outlet duct 112 And the upper duct chamber 114 and the lower duct chamber 115 communicating with each other to partially open the upper and lower portions of the cross sectional area enlarging duct 113 are formed. 7, the duct system construction part 110 includes an upper duct chamber 114 and a lower duct chamber 115 connected to the upper and lower portions of the cross-sectional area enlarged duct 113, respectively, And the sealing of the duct and the filter can be maintained by fastening with a labyrinth sealing member 116 to prevent leakage of ultrafine dust. Here, the exhaust duct 112 discharges the ultrafine dust contained in the flue gas to only the flue gas filtered by the roll curtain type filter 121 of the filter unit 120 to be described later. The duct system constructing unit 110 is configured to reduce the wind velocity of the flue gas through the cross sectional area of the enlarged internal space of the cross sectional area enlarging duct 113 and the roll curtain type utilizing the pulley 133 of the filter driving unit 130, Securing the cross-sectional area of the filter 121 can reduce the pressure difference and increase the collection efficiency.

The filter unit 120 is provided with a roll curtain type filter 121 across the upper duct chamber 114 and the cross sectional area enlarging duct 113 and the lower duct chamber 115 of the duct system constituent unit 110 And filter the untreated superfine dust contained in the flue gas introduced through the inlet duct 111 by filtration. The filter unit 120 constitutes a roll curtain type filter 121 having a surface area enlarged through a folded shape arranged in a zigzag shape. The roll curtain type filter 121 has a special And can be made of a material resistant to sulfur components. The roll curtain type filter 121 moves upward or downward when a differential pressure is generated on the filter surface so that a new filter surface is applied and the used filter surface is regenerated by cleaning to enable repeated use.

The filter driving unit 130 is configured to connect the roll curtain type filter 121 of the filter unit 120 so as to be arranged in a zigzag manner and to drive the roll curtain type filter 121 to move up and down. 9, the filter driving unit 130 includes a plurality of shafts 131 wound around the roll curtain type filter 121 so as to be arranged in a staggered manner, And a pulley 133 for connecting the belt 134 to one of the bearings 132 on one side of the bearings 132 on both sides And the belt 134 is connected between the pulleys 133. The cylinder 135 is installed on the pulleys 133 on the inlet duct 111 side and the pulley 133 located on the lowermost stage is connected to the motor 136 may be connected to a chain 138 to which a sprocket 137 of the motor 136 is connected to receive a filter driving force of the motor 136. Here, the cylinder 135 may function to adjust the positional change of the pulley 133 to adjust the tension of the roll curtain type filter 121.

The filter drum unit 140 is configured to drive the roll curtain type filter 121 so that the roll curtain type filter 121 can be wound when the roll curtain type filter 121 is moved up and down. 10, a pair of drums 141 connected to and fixed to both ends of the roll curtain type filter 121 are connected to the upper duct chamber 114 and the lower duct 121. [ The shaft 142 is connected to one of the pair of drums 141 and is exposed to the outside and is connected to the shaft 142 of the shaft 142 by a chain And a coupling 144 may be disposed. Here, the pair of drums 141 can be interlocked to wind the roll curtain type filter 121. In the present invention, the gear motor 143 is formed in only one of the pair of the drums 141. However, the present invention is not limited thereto, and a gear motor 143 may be installed on both of the pair of drums 141 Alternatively, a gear motor 143 may be installed in only one drum 141, and a pair of drums 141 may be driven in conjunction with each other in forward and reverse directions.

The collected fine dust discharging portion 150 is connected to the lower portion of the lower duct chamber 115 of the duct system constituting portion 110 so as to be communicatively connected thereto and is filtered by the roll curtain type filter 121, It is a configuration for collecting. 11, the collected fine dust discharging portion 150 is formed with a hopper 151 connected to the lower portion of the lower duct chamber 115 so as to communicate with the lower portion of the lower duct chamber 115, A second chute 153 of a corresponding shape is connected to a lower portion of the first chute 152 and a conveyor 154 is disposed below the second chute 153, And the third chute 155 is connected to a lower portion of the second chute 155. Here, the collected fine dust discharging part 150 may further include a vacuum pump or a dust collecting device not shown in the rear end of the third chute 155. In this case, the fine dust discharging part 150, It is possible to effectively collect the dust-removing fine dust using the vacuum pump or the dust collector.

The filter exhausting part 160 blocks the clogging phenomenon during use of the roll curtain type filter 121 located at the upper part of the collected fine dust exhausting part 150, that is, the mesh of the filter surface is closed to eliminate the phenomenon The filter cleaning is performed by injecting compressed air or steam. As shown in FIG. 12, the filter exhausting unit 160 may include a filter 150 disposed at an upper portion of the fine dust discharging unit 150 in which a flow pipe 161 penetrating the lower duct chamber 115 is collected, A diaphragm valve 162 and a flange 163 are continuously connected to a portion of the curtain type filter 121 that is exposed to the outside of the flow pipe 161 and a flange 163, A regulator 164 for regulating the speed, temperature, and pressure of the exhausting medium including instrument air, gas, and hot steam supplied from the outside is installed As shown in FIG.

FIG. 7 is an exploded perspective view of a duct system constituent part of an in-duct filtering device for removing fine particulate at the rear end of an electrostatic precipitator according to an embodiment of the present invention. As shown in FIG. 7, the duct system constructing unit 110 reduces the wind speed of the flue gas through the enlargement of the duct cross-sectional area and secures the sectional area of the roll curtain type filter 121 using the front and rear pulleys 133, The inlet duct 111 and the outlet duct 112 are arranged in the horizontal direction in which the flue gas flows with the center of the cross sectional area enlarging duct 113 whose efficiency can be increased and the upper and lower portions of the cross sectional area enlarging duct 113 And the upper duct chamber 114 and the lower duct chamber 115 are connected to each other. The passageway of the duct and the filter allows for sealing by utilizing its own flue gas or separate instrument air with the adoption of the labyrinth sealing member 116.

FIG. 8 is a perspective view of a filter unit of an in-duct filtering apparatus for removing fine dust at the rear end of an electrostatic precipitator according to an embodiment of the present invention. Referring to FIG. 8, the filter unit 120 is composed of a roll curtain type filter 121 having a surface area enlarged through a folded shape arranged in a zigzag shape, and both ends of the roll curtain type filter 121 are provided with one And a filter support capable of being rolled to be fastened to the pair of drums 141, respectively. The roll curtain type filter 121 according to the present invention can be applied to materials suitable for the differential pressure, area, efficiency, desulfurization component, and service temperature of the filter. For example, it may be composed of hepa or ulpa filter material widely known in domestic or industrial fields.

FIG. 9 is a perspective view of a filter driving unit of an in-duct filtering apparatus for removing fine dust at the rear end of an electrostatic precipitator according to an embodiment of the present invention. 9, the filter driving unit 130 includes a plurality of shafts 131 passing through the cross-sectional area enlarging duct 113 so that the roll curtain type filter 121 can be arranged in a zigzag shape The bearings 132 are fastened to both sides of the plurality of shafts 131 and the pulleys 133 for connecting the belts 134 to the bearings 132 on one side of the bearings 132 on both sides And a cylinder 135 for adjusting the tension of the roll curtain type filter 121 is attached to the pulley 133 on the side of the inlet duct 111. The belt 135 is connected to the pulley 133 for interlocking between the pulleys 133, And a pulley 133 located at the lowermost end is coupled to a chain 138 to which a sprocket 137 of a motor 136 is connected. FIG. 9 also shows an enlarged view of the detailed structure of the filter driving unit 130.

FIG. 10 is a perspective view of a filter drum unit of an in-duct filtering apparatus for removing fine dust at the rear end of an electrostatic precipitator according to an embodiment of the present invention. 10, the filter drum unit 140 includes a pair of drums 141 for allowing the roll curtain type filter 121 to be wound when the roll curtain type filter 121 is moved up and down, A shaft 142 connected to one of the drums 141 and a chain coupling 144 coupled to the gear motor 143 at a shaft connecting portion of the shaft 142 may be disposed. Fig. 10 also shows an enlarged view of the detailed configuration of the filter drum unit 140. Fig.

11 is a view showing a configuration of a collected fine dust discharging portion of a filtering device for removing fine dust at the rear end of an electrostatic precipitator according to an embodiment of the present invention. 11, the collected fine dust discharging portion 150 includes a hopper 151 connected to a lower portion of the lower duct chamber 115, a first chute 152, a second chute 153 ), A conveyor 154, and a third chute 155 are sequentially connected. 11 (a) shows a front view of the collected fine dust discharging part 150, and FIG. 11 (b) shows a perspective view of the collected fine dust discharging part 150. FIG.

FIG. 12 is a perspective view of a filter venting part of an in-duct filtering device for removing fine particulate at the rear end of an electrostatic precipitator according to an embodiment of the present invention. FIG. As shown in FIG. 12, the filter exhausting unit 160 is configured to perform filter cleaning by spraying compressed air or steam so that a clogging phenomenon can be solved during use of the roll curtain type filter 121, A flow pipe 161 in which a nozzle (not shown) is formed, a diaphragm valve 162 connected to the flow pipe 161, a flange 163 connected to the diaphragm valve 162 and a flange 163 connected to the rear end of the flange 163 And a regulator 164 connected in series.

The duct filtering apparatus for removing fine dust at the rear end of the electrostatic precipitator according to an embodiment of the present invention may be installed at a stage downstream of the electrostatic precipitator in a power plant or an industrial plant, Filtering the ultrafine dust, filtering the ultrafine dust, collecting the denitrifying fine dust, and preventing contamination from being effectively prevented. This will enhance facility safety, improve relations with local residents due to the reduction of dust emissions, preemptive response to ultra fine dust environment regulations, and the effect as an eco-friendly corporate image.

The present invention may be embodied in many other specific forms without departing from the spirit or essential characteristics of the invention.

100: an in-duct filtering device for removing fine dust at the rear end of an electrostatic precipitator according to an embodiment of the present invention
110: duct system constituent part 111: inlet duct
112: outlet duct 113: cross-sectional area enlarging duct
114: upper duct chamber 115: lower duct chamber
116: Labyrinth seal member 120: Filter part
121: Roll curtain type filter 130: Filter driving part
131: shaft 132: bearing
133: pulley 134: belt
135: cylinder 136: motor
137: Sprocket 138: Chain
140: filter drum part 141: drum
142: shaft 143: gear motor
144: Chain coupling 150: Collected fine dust outlet
151: hopper 152: first suit
153: second suit 154: conveyor
155: Third suit 160: Filter exhaust part
161: Flow tube 162: Diaphragm valve
163: Flange 164: Regulator

Claims (10)

An electrostatic precipitator for filtering untreated ultrafine dust contained in a flue gas discharged from an electrostatic precipitator and installed downstream of an electrostatic precipitator (EP) at a power plant or an industrial plant site. As the filtering device 100,
Sectional area between the inlet duct 111 and the outlet duct 112. The inlet duct 111 and the outlet duct 112 are formed on both sides of the vertical or horizontal direction in which the flue gas flows, A duct system constitution unit 110 in which an enlarged duct 113 is formed and an upper duct chamber 114 and a lower duct chamber 115 are formed so as to partially open at upper and lower portions of the cross sectional area enlarged duct 113, ;
A roll curtain type filter 121 is staggered from the upper duct chamber 114 to the sectional duct enlarged duct 113 and the lower duct chamber 115 of the duct system constructing unit 110, A filter unit 120 for filtering and filtering untreated ultrafine dust contained in the flue gas introduced through the inlet duct 111;
A filter driving unit 130 connected to the filter unit 120 so that the roll curtain type filter 121 can be disposed in a zigzag manner and driven to move the roll curtain type filter 121 up and down;
A filter drum 140 for driving the roll curtain type filter 121 to be wound when the roll curtain type filter 121 is moved up and down;
A dust collecting unit for collecting ultrafine dust filtered by the roll curtain type filter 121 and connected to the lower duct chamber 115 of the duct system constructing unit 110 to collect dust, (150); And
A filter exhausting part 160 for performing filter cleaning by spraying compressed air or steam so as to eliminate a clogging phenomenon during use of the roll curtain type filter 121 located above the collected fine dust discharging part 150 ) For filtering the dust particles in the duct.
The duct system according to claim 1, wherein the duct system component (110)
The upper duct chamber 114 and the lower duct chamber 115 connected to the upper and lower portions of the cross-sectional area enlarging duct 113 are partially opened by a labyrinth sealing member 116 So that the leakage of ultrafine dust is prevented and the sealing of the duct and the filter is maintained.
The filter unit according to claim 1, wherein the filter unit (120)
The roll curtain type filter 121 is constructed such that the surface area is enlarged through a folded shape arranged in a zigzag shape. The roll curtain type filter 121 is specially manufactured to reduce ventilation resistance and move up and down, Wherein the filter is made of a material having a specific surface area.
The apparatus of claim 3, wherein the roll curtain type filter (121)
Wherein when a differential pressure is generated on the surface of the filter, the filter surface moves to the upper portion or the lower portion to apply a new filter surface, and the used filter surface is regenerated by cleaning to enable repeated use. Filtering device in the duct.
The apparatus of claim 1, wherein the filter driver (130)
A plurality of shafts 131 wound around the roll curtain type filter 121 so as to be arranged in a zigzag shape are arranged to pass through the cross sectional area enlarging duct 113 and the bearings 132 And a pulley 133 for connection of the belt 134 is formed on one of the bearings 132 on both sides of the bearings 132. The belt 134 is connected between the pulleys 133 A cylinder 135 is installed in each of the pulleys 133 on the inlet duct 111 side and a sprocket 137 of the motor 136 is connected to a pulley 133 located in the lowermost position. And connected to the chain (138) to be connected to receive the filter driving force of the motor (136).
6. The apparatus according to claim 5, wherein the cylinder (135)
And functions to adjust the tension of the roll curtain type filter (121) by adjusting the position of the pulley (133) to adjust the tension of the roll curtain type filter (121).
The filter cartridge according to claim 1, wherein the filter drum portion (140)
A pair of drums 141 connected and fixed to both end rolling portions of the roll curtain type filter 121 are disposed in the upper duct chamber 114 and the lower duct chamber 115 and a pair of drums 141 And a chain coupling 144 coupled to the gear motor 143 is disposed at a shaft connecting portion of the shaft 142. The shaft 142 is connected to the shaft 142 and is exposed to the outside, In the duct for removing fine dust at the rear end of the electrostatic precipitator.
The dust collecting apparatus according to claim 1, wherein the collected fine dust discharging portion (150)
A first chute 152 is connected to a lower portion of the hopper 151 and a second chute 152 is connected to a lower portion of the first chute 152. The first chute 152 is connected to a lower portion of the lower duct chamber 115, A screw conveyor 154 is disposed below the second chute 153 and a third chute 155 is connected to a lower portion of the screw conveyor 154 Wherein the filter is configured to have a structure in which the dust particles are removed from the duct.
9. The apparatus according to claim 8, wherein the collected fine dust discharging portion (150)
Wherein a vacuum pump or a dust collector is further installed at a rear end of the third chute 155 so that dust can be trapped using the vacuum pump or the dust collector, Filtering device in the duct for dust removal.
2. The filter according to claim 1, wherein the filter exhausting part (160)
The filter is disposed on an upper portion of a roll curtain type filter 121 located at an upper portion of a fine dust discharging portion 150 in which a flow pipe 161 penetrating the lower duct chamber 115 is collected, A diaphragm valve 162 and a flange 163 are continuously connected to a portion exposed to the outside of the flange 163 and an instrument air supplied from the outside to the rear end of the flange 163. [ And a regulator (164) for regulating the speed, temperature and pressure of the denitration medium, including a gas, a hot gas, and a hot steam, Duct filtering equipment for fine dust removal.

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