KR101035729B1 - Complex apparatus for coal fine dust collecting - Google Patents

Abstract

PURPOSE: A dust coal complex collecting apparatus is provided to prevent the corrosion or the malfunction of the apparatus by the excessive moisture, by treating moisture briquette dust and micro dust at the same time. CONSTITUTION: A dust coal complex collecting apparatus comprises the following: a cyclone body(110); a bag filter body(120) located on the upper side of the cyclone body; a guiding body(130) with one side located in the inside of the cyclone body, and the other side connected to the bag filter body; a gas inflowing module(140) including a collected dust inlet pipe(160) and a drying gas inflow pipe(150), connected to the cyclone body; and an exhaust unit(170) including plural dispersing flow path(184) and a compressed air supplying flow path(182).

Description

Complex apparatus for coal fine dust collecting

The present invention relates to a dust collecting device, and more particularly, to carry out dust collection using a cyclone, a dust collector, and a plurality of control dampers, and to feed and mix raw materials of a thermal power plant through a structure that enables supply of exhaust gas or dry air. The present invention relates to a dust collecting apparatus capable of removing dust and water from wet coal dust generated in a process of crushing, crushing and silo.

Some non-industrial industries operate various combustion facilities, such as power generation boilers and incineration boilers, to secure necessary energy, such as electricity or steam. To remove dust generated in the process of transferring coal, which is a raw material to the combustion facility, through a conveyor, pulverization using a pulverizer, mixing (blending) using a mixer, and adding coal raw materials to a silo through a tripper. Dust collection facilities, which are pollution prevention devices, are necessarily attached.

In the operation of a thermal power plant among the energy-heavy industries, emission of moisture and dust-containing exhaust gas may be a particular problem. In case of using coal dust with high water content when operating a thermal power plant, it may cause excessive inflow of water vapor into the dust collector. It can be seen that in summer, the water content of 30 to 40% due to the increase in water content due to rainfall and watering.

As described above, when the moisture and dust remaining in the exhaust gas flowing into the dust collector are excessively excessive, pores of the bag filter installed inside the dust collector are blocked in a short time, and as a result, the life of the bag filter may be shortened. Can be. In addition, excessive moisture remaining in the exhaust gas causes excessive stagnation and corrosion of condensate in the gas delivery pipe.

In the existing coal-fired power generation system, there may be a problem that the risk of spontaneous ignition and explosion increases due to the dust accumulated in the dust collector, and the risk of fire and explosion due to the volatilization of the vapor due to the accumulation of dust also remains. have.

When the dust collector is being repaired due to the performance problems of the bag filter or the conveying pipe forming the dust collector as described above, the burden of total shutdown of the thermal power plant equipment is incurred. As a result, there is a need for structural improvement to improve durability.

The present invention, in order to solve the above problems, a cyclone body connected to the collection dust inlet and the dry gas inlet, a bag filter body disposed on the upper portion of the cyclone body, and one side is disposed in the cyclone body and the other side is An object of the present invention is to provide a dust collecting device capable of removing dust and water from moist coal dust generated from coal, which is a raw material of a thermal power plant, through a structure including a guide part connected to a bag filter body.

Dust collecting device according to the present invention provided to achieve the above object is a cyclone body, a bag filter body disposed on the cyclone body, one side is disposed inside the cyclone body and the other side is connected to the bag filter body And a gas inlet module fixed to communicate with the cyclone body, wherein the gas inlet module includes a collecting dust inlet tube and a dry gas inlet tube.

The gas inlet module may preferably include a first regulating damper disposed in the collecting dust inlet pipe and a second regulating damper disposed in the dry gas inlet pipe.

The dust collecting apparatus further includes a control unit electrically connected to the first and second regulating dampers, wherein the control unit controls any one or more of the first adjusting damper and the second adjusting damper to control the collection dust inlet pipe or the drying unit. It may be desirable to open and close the gas inlet tube.

The gas inlet module may be preferably in tangential communication with one side of the cyclone body.

The cyclone body may include a cylindrical mixing part connected to the gas inlet module, a guide part extending inclined from the lower end of the mixing part, and a discharge part connected to the guide part.

The cyclone body may further include a rotary valve disposed in the discharge unit, and the rotary valve may be controlled to open and close the discharge unit by the control unit.

The guide body may have a built-in part disposed at a predetermined distance from the cyclone body and an exterior part extending from an upper end of the built-in part.

The diameter of the mixing portion may be preferably maintained in the range of 1.5 to 1.7 times the diameter of the internal portion.

The bag filter body may be preferably provided with a cartridge filter for coal dust collection therein.

As described above, the inventors of the present invention simultaneously treat the moist coal dust and fine dust included in the collected dust generated in the process of thermal power generation to prevent corrosion or failure of the equipment which may be caused by excessive moisture. prevent.

The present invention undergoes a process in which fine dust, which is not primarily processed in the cyclone body, flows upward through the guide body and is collected secondarily in the bag filter body. In addition, dust accumulation accumulated on the bag filter surface may be separated and dropped by compressed air, thereby greatly increasing dust collection efficiency.

According to the present invention, the gas inlet module supplied with the collecting dust and the dry gas is tangentially connected to one side of the cyclone body so that the supplied gas enables smooth rotational movement in the cyclone body. Through this process, dust emission and internal drying process can be performed efficiently.

The present invention effectively collects and discharges dust accumulated in the dust collector of the coal-fired power generation system to greatly reduce the risk of fire and explosion to increase the safety in the operation process.

In addition, the present invention eliminates wasteful elements such as inefficient time and manpower required for breakdown and maintenance, thereby increasing overall productivity and work efficiency.

1 is a configuration diagram showing a dust collector as an embodiment of the present invention, and
2 is a front view of the dust collector of the present invention as seen from one side.

The above objects, features and other advantages of the present invention will become more apparent by describing the preferred embodiments of the present invention in detail with reference to the accompanying drawings. The described embodiments are provided by way of example for purposes of illustration, and do not limit the technical scope of the present invention. In this process, the thickness of the lines or the size of the components shown in the drawings may be exaggerated for clarity and convenience of description. In addition, the terms described below are defined in consideration of the functions of the present invention, which may vary depending on the intention or custom of the user, the operator. Therefore, definitions of these terms should be made based on the contents throughout the specification.

Hereinafter, a dust collecting apparatus according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

Description of the overall configuration of the dust collector 100

First, referring to Figures 1 and 2 to look at the overall configuration of the dust collector 100 according to the present invention.

The dust collector 100 according to the present invention includes a cyclone body 110, a bag filter body 120 disposed above the cyclone body 110, one side of which is disposed inside the cyclone body 110, and the other side of the bag filter body. A guide body 130 connected to the 120, a gas inlet module 140 fixed to communicate with the cyclone body 110, and an exhaust unit 170 covering an upper portion of the bag filter body 120. The cyclone body 110 is coupled to the cradle 102 is fixed to the ground. The cradle 102 may be a frame structure having a rectangular box shape, and the reinforcing rod 104 may be alternately disposed in an oblique direction to assist the coupling of the cyclone body 110 and the cradle 102.

The gas inlet module 140 includes a collecting dust inlet tube 160 coupled in communication with the cyclone body 110 and a dry gas inlet tube 150 coupled in communication with the collecting dust inlet tube 160. Here, the collected dust inlet pipe 160 is connected to the wet coal outlet 101, the dry gas inlet pipe 150 is connected to the dry gas supply source 103, in the process of transferring the wet coal in the wet coal outlet 101, etc. The generated dust flows into the cyclone body 110 through the collecting dust inlet tube 160, and the dry gas supplied from the dry gas source 103 is collected through the dry gas inlet tube 150. To flow.

The gas inlet module 140 includes a first regulating damper 165 disposed in the collected dust inlet pipe 160 and a second regulating damper 155 disposed in the dry gas inlet pipe 150. In the present invention, the first control damper 165 may function as the main damper, and the second control damper 155 may function as the sub damper. The second control damper 155 may be specifically applied in a coal-fired power generation system, and closes the dry gas inlet pipe 150 during the normal coal work, and after the coal coal work is completed, the dry gas inlet pipe. Opening 150 may dry the internal components of the dust collecting apparatus 100 including the bag filter 121.

The control dampers 155 and 165 are electrically connected to a controller (not shown). The control unit alternately operates the control dampers 155 and 165 to alternately open and close the collection and drying gas inlet pipes 150 and 160. That is, the coal dust generated during the transfer of the wet coal from the wet coal discharge port 101 may contain the wet coal dust due to climatic or environmental factors, and thus, dry air is supplied separately after the purification of the wet coal dust is performed. As a result, it is necessary to keep the inside of the dust collecting apparatus 100 in a dry state.

The cyclone body 110 has a cylindrical mixing part 111 connected to the gas inlet module 140, a guide part 115 extending obliquely from a lower end of the mixing part 111, and a downward direction in the guide part 115. Discharge part 117 extending to the, and the rotary valve 119 in charge of opening and closing operation inside the discharge part 117.

The cyclone body 110 may have a predetermined protrusion (not shown) along an inner surface of the cyclone body 110 to support a circulating motion of the collected dust flowing through the collected dust inflow pipe 160. The protrusion may have a spiral shape of a spiral shape. This protrusion shape allows the dust of relatively large macromolecules to flow downward by the rotating centrifugal force. On the other hand, the collection dust inlet pipe 160 coupled to the cyclone body 110 may be preferably coupled to the outer surface of the mixing portion 111 in a tangential direction, which is a horizontal direction along the inner peripheral surface of the mixing portion 111 It is a structural basis that can support the circular movement of the exhaust gas in the cyclone body 110 by allowing the incident.

From the point where the guide part 115 and the discharge part 117 meet, the virtual reference line 105 extending in parallel to the ground is set, and the outer circumferential surface of the reference line 105 and the guide part 115 is the first The angle of inclination α is achieved. The first inclination angle α may maintain an angle between 55 ° and 60 ° in order to help smoothly lower the dust dust flowing downward in the cyclone body 110, and may preferably be 58 °.

The discharge part 117 is formed relatively small in diameter compared to the mixing part 111 and the guide part 115 to discharge the dust at a high speed.

The rotary valve 119 may adjust the flow amount through the discharge portion 117, thereby allowing the exhaust gas or dry gas in the cyclone body 110 of the exhaust gas or the dry gas inlet pipe 150 to be collected. To adjust the residence time. That is, for example, in the case of supplying the dry gas, the rotary valve 119 may be used to operate in a state in which the discharge part 117 is closed in order to sufficiently dry the cyclone body 110.

The bag filter body 120 includes a support panel 126 having a predetermined thickness disposed therein and a plurality of bag filters 121 disposed vertically through the support panel 126. The bag filter 121 may employ a cartridge filter for coal dust dust collection, which is commercially available in a dust collecting or dust extraction facility. The cartridge filter for coal dust dust collection may have a special treatment on its surface in order to increase the dust collecting area in a single section. It can be used. The support panel 126 prevents the fine dust flowing into the bag filter body 120 through the guide body 130 from flowing to the exhaust unit 170 without being collected through the bag filter 121. In addition, the support panel 126 may serve to maintain the gap between the bag filters 121 and support the same.

In the exhaust unit 170 coupled to the upper portion of the bag filter body 120, a distribution flow path 184 is disposed in a line, and a compressed air supply flow path 182 connected to the distribution flow path 184 is provided on an outer surface thereof. Is placed. The compressed air supply passage 182 receives compressed air while being connected to the compressed air supply source 180.

When the dust collection process is performed in the dust collecting apparatus 100 of the present invention, when the dust is excessively attached to the bag filter 121 and its size is large enough to close the pores formed on the outer surface of the bag filter 121, the dust is collected. Since there is a disadvantage that the efficiency is sharply lowered, in order to overcome this, the high-pressure and high-speed compressed air is radiated to the surface of the bag filter 121 through the distribution flow path 184 (see FIG. 186). That is, the compressed air is sprayed to perform the function of separating the dust mass attached to the bag filter 121, the separated dust mass is dropped by its own weight.

The guide body 130 extends from the upper end of the inner part 135 and the inner part 135 disposed at a predetermined spacing interval in the mixing part 111, and the outer part 131 having an increasing diameter. It is provided. The diameter of the mixing portion 111 may maintain a ratio of about 1.5 to 1.7 times the diameter of the interior portion 135, preferably 1.6 times to facilitate the flow of fine dust along the interior portion 135 It can be maintained at the ratio of.

From the point where the exterior part 131 and the interior part 135 meet, a virtual reference line 105 extending in parallel to the ground is set, and the outer circumferential surfaces of the reference line 105 and the exterior part 131 are second to each other. The inclination angle β is achieved. The second inclination angle β may maintain an angle between 55 ° and 60 ° in order to facilitate smooth rise of fine dust along the inner circumferential surface of the guide body 130, and preferably, may be 58 °.

Overall operation description of the dust collector 100

Hereinafter, the overall operation of the dust collecting apparatus 100 according to the present invention will be described with reference to FIGS. 1 and 2 again.

First, the control unit operates the first control damper 165 to open the inside of the collecting dust inlet tube 160, so that the moist coal dust generated at the wet coal outlet 101 is collected through the collecting dust inlet tube 160 through the cyclone body 110. Flows in (see 162). Coarse dust moistened in the inflow of the wet coal dust may exhibit a flow form that gradually decreases due to the centrifugal force generated during the horizontal movement along the inner circumferential surface of the cyclone body (110) (see Fig. 116).

On the other hand, the fine dust of the wet coal dust may exhibit an upward flow form by a relatively small density difference by the flow of the coarse dust. By this principle the fine dust can have a flow that rises along the inner circumferential surface of the guide body 130 (see FIG. 122).

The rising fine dust is purified by the bag filter 121 in the bag filter body 120 and attached to the surface thereof. The moist coal dust purified through the bag filter 121 is discharged to the outside through the exhaust port 172 formed at one side of the exhaust unit 170.

Since dust adhered to the surface of the bag filter 121 during the dust collecting process deteriorates the performance of the bag filter 121, the bag filter 121 is forcibly supplied by periodically supplying compressed air through the distribution channel 184. Allow to exfoliate fine dust particles attached to it. Here, a plurality of injection nozzles (not shown) may be mounted in the distribution flow path 184. The injection nozzles supply compressed air in an inclined direction in the bag filter body 120 to facilitate desorption of fine dust. do. The detached fine dust particles move downward as shown by reference numeral 124. In this way, fine dust particles accumulated and adsorbed on the surface of the bag filter 121 and coarse molecular particles moving downward along the inner circumferential surface of the cyclone body 110 are discharged to the outside through the discharge part 117 (Fig. Number 118).

In the present invention, since a dust collecting process for a predetermined time is performed on the exhaust gas generated by using high moisture coal, since the humidity in the dust collecting apparatus 100 may increase, it may adversely affect the operation and life of the apparatus and thus the drying process. Do this. In particular, the increase in moisture in the bag filter 121 has a significant adverse effect on the dust removal treatment, so that the idling is performed at the end of the top coal working in the thermal power plant, the drying operation is performed in parallel during the idling time.

In the drying process, the control unit operates the first control damper 165 to close the collecting dust inlet pipe 160, and simultaneously operates the second control damper 155 to open the dry gas inlet pipe 150 to dry gas. Is introduced into the cyclone body 110 (see reference numeral 152). The incoming dry air causes the inside of the dust collecting apparatus 100 and the state of the bag filter 121 to be restored while maintaining the temperature range of 20 ° to 35 °.

In this case, the rotary valve 119 is used to operate in a state in which the discharge part 117 is closed to allow discharge after sufficient drying is made.

In the present invention, the collecting dust containing the first wet dust is introduced into the cyclone body 110 through the collecting dust inlet pipe 160 to perform a dust collecting process for a predetermined time, and then the control unit controls the control damper to dry gas. By opening the inlet pipe 150 to remove excess moisture in the dust collector 100 through the process of introducing the dry gas into the cyclone body 110 secondary.

The dust collector of the present invention simultaneously prevents corrosion or failure of equipment that may be caused by excessive moisture by simultaneously treating moist coal dust and fine dust included in collected dust generated during thermal power generation.

While preferred embodiments of the present invention have been described above, the present invention is not limited to the above-described specific embodiments. That is, those skilled in the art to which the present invention pertains can make many changes and modifications to the present invention without departing from the spirit and scope of the appended claims, and all such appropriate changes and modifications are possible. Equivalents should be considered to be within the scope of the present invention.

100: dust collector
101: wet coal outlet
102: holder
103: dry gas supply source
104: reinforcement
110: cyclone body
111: mixing section
115: guide part
117: discharge part
119: Rotary Valve
120: bag filter body
121: bag filter
126: support panel
130: guide body
131: exterior
135: internal parts
140: gas inlet module
150: dry gas inlet pipe
155: second adjustable damper
160: collected dust inlet pipe
165: first adjustable damper
170: exhaust
172: exhaust port
180: compressed air source
182: compressed air supply passage
184: distribution euro
α: first inclination angle
β: second inclination angle

Claims (9)

Cyclone body;
A bag filter body disposed above the cyclone body;
A guide body having one side disposed inside the cyclone body and the other side connected to the bag filter body; And
A gas inlet module comprising a collecting dust inlet tube fixed to communicate in a tangential direction to one side of the cyclone body and a dry gas inlet tube communicating with the collecting dust inlet tube;
An exhaust unit coupled to an upper portion of the bag filter body and having a plurality of distribution passages arranged in a line and a compressed air supply passage connected to the plurality of distribution passages;
Including;
Collecting dust is introduced into the cyclone body through the collecting dust inlet pipe, and dry air of 20 ° C. to 35 ° C. is introduced into the cyclone body through the drying gas inlet pipe, and
Compressed air is injected into the bag filter body through the plurality of distribution passages,
cyclone.
The method of claim 1,
The gas inlet module includes a first regulating damper disposed in the collecting dust inlet pipe and a second regulating damper disposed in the dry gas inlet pipe.
cyclone.
The method of claim 2,
The dust collector,
And a control unit electrically connected to the first and second control dampers, wherein the control unit controls any one or more of the first control damper and the second control damper to control the collection dust inlet pipe or the dry gas inlet pipe. Characterized in that the opening and closing,
cyclone.
The method of claim 2,
The bag filter body,
A support panel horizontally disposed inside the bag filter body; And
And a plurality of bag filters disposed vertically through the support panel.
Compressed air injected through the plurality of distribution passages is sprayed on the surfaces of the plurality of bag filters, characterized in that to separate the dust mass attached to the plurality of bag filters,
cyclone.
The method of claim 3, wherein
The cyclone body includes a cylindrical mixing portion connected to the gas inlet module, a guide portion extending inclined from the lower end of the mixing portion, and the discharge portion connected to the guide portion,
cyclone. The method of claim 5, wherein
The cyclone body further comprises a rotary valve disposed in the discharge portion, characterized in that the rotary valve is controlled to open and close the inside of the discharge portion by the control unit,
cyclone.
The method of claim 5, wherein
The guide body has a built-in portion disposed to maintain a predetermined spacing interval in the cyclone body and the exterior portion of the shape extending from the upper end of the built-in portion,
cyclone.
The method of claim 7, wherein
The diameter of the mixing portion is characterized in that for maintaining a range between 1.5 to 1.7 times the diameter of the internal portion,
cyclone.
The method of claim 1,
The bag filter body is characterized in that the cartridge filter for collecting dust dust therein,
cyclone.

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