Filter regeneration device and method for denitrification equipment

Abstract

To provide catalyst regenerating apparatus and method of a denitrification facility for regenerating a filter while automatically performing washing and coating of the filter attached to the denitrification facility without separation of the filter.SOLUTION: Disclosed is a filter regenerating apparatus of a denitrification facility, the apparatus including: a body module disposed above a filter installed in the denitrification facility, and capable of being transferred in a first direction; a nozzle support module supported by the body module and capable of reciprocating in a second direction crossing the first direction; a coating material spray nozzle detachable from the nozzle support module and capable of spraying a coating material toward the filter disposed below; and a power control module configured to control operations of the body module and the nozzle support module so that the coating material spray nozzle is transferred along the filter in the first and second directions.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to an apparatus and a method for regenerating a filter in denitrification equipment, and more particularly, to an apparatus and a method for regenerating a filter in denitrification equipment that regenerate a denitrification catalyst in power generation equipment. [Background Art]

[0002] Generally, thermal power plants operate using coal or petroleum as fuel. In recent years, regulations on environmental pollution have been tightened, and research, development and supplementation of environmental equipment capable of reducing pollutant emissions have been increasing.

[0003] Prior art relating to such environmental equipment is disclosed in Patent Document 1. The registered invention described above is characterized by comprising denitrification equipment that denitrifies exhaust gas by injecting a reducing agent into exhaust gas discharged from a power plant.

[0004] The denitrification equipment is provided with a denitrification catalyst, i.e., a filter, to denitrify exhaust gas. The denitrification catalyst is poisoned by ammonium sulfate, dust, metal salts, etc. during repeated denitrification processes, so replacement or regeneration is required. However, since most cleaning of denitrification catalysts is performed manually, there is a problem that the cleaning of the denitrification catalyst cannot be performed uniformly. Furthermore, when a denitrification catalyst is poisoned by substances such as sodium, potassium and phosphorus pentoxide, it is difficult to regenerate the denitrification catalyst, leading to problems such as environmental issues caused by disposal and increased landfill costs. [Prior Art Documents] [Patent Documents]

[0005] [Patent Document 1] Korean Registered Patent No. 10-1918663 [Summary of the Invention] [Problem to be Solved by the Invention]

[0006] The object of the present invention is to provide a catalyst regeneration apparatus and method for a denitrification plant that automatically cleans and coats filters installed in the denitrification plant without separating the filters, thereby regenerating the filters. [Means for solving the problem]

[0007] The filter regeneration device for a denitrification facility according to the present invention comprises: a main body module positioned above a filter mounted on a denitrification facility and moved in a first direction; a nozzle support module supported by the main body module and moved back and forth in a second direction intersecting the first direction; a coating substance injection nozzle detachably attached to the nozzle support module and for injecting a coating substance toward the filter located below it; and a power control module that controls the operation of the main body module and the nozzle support module so that the coating substance injection nozzle is moved along the filter in the first and second directions.

[0008] The filter regeneration device of the denitrification equipment further includes a cleaning substance injection nozzle that is mounted on the nozzle support module and injects dry ice toward the filter located below, before the coating substance is injected, and the coating substance injection nozzle and the cleaning substance injection nozzle can be attached to and detached from the nozzle support module together or selectively.

[0009] The filter regeneration device of the denitrification equipment further comprises a cleaning substance supply module that provides dry ice and compressed air to the cleaning substance injection nozzle, and the cleaning substance supply module can adjust the injection pressure of the dry ice pellets and the compressed air to 4 bar to 8 bar.

[0010] The dry ice particles penetrate the pores of the filter and then sublimate, allowing the toxic substance in the filter to be discharged to the outside through the pores of the filter.

[0011] The dry ice sprayed toward the filter instantaneously forms a vacuum between the inner walls of the filter, allowing the toxic substance to be discharged from the filter.

[0012] The filter regeneration device of the denitrification equipment further comprises a coating material supply module that provides the coating material to the coating material injection nozzle, and the coating material may include an aqueous solution of vanadium pentoxide.

[0013] After the coating spray nozzle sprays the coating material toward the filter, the boiler connected to the denitrification equipment is activated to heat the filter installed in the denitrification equipment.

[0014] The filter regeneration device of the denitrification equipment may further include a rail module that can be installed above the filter and forms a path through which the main module is transported in the first direction.

[0015] The main body module may include a main body frame, a transfer roller disposed between the main body frame and the rail module to allow the main body frame to move along the rail module, a support frame supported by the main body frame and forming a path through which the nozzle support module is moved in the second direction, a first power source that provides power to the transfer roller to move the main body module in the first direction, and a second power source that provides power to the nozzle support module to move the nozzle support module along the support frame in the second direction.

[0016] The rail module may include a first rail frame and a second rail frame spaced apart from each other and provided along the frame of the denitrification equipment in the first direction, and a connecting frame connecting the first rail frame and the second rail frame.

[0017] The power control module can move the nozzle support module in the first and second directions according to a predetermined rule.

[0018] The power control module can control the nozzle support module to move across the entire upper area of ​​the filter.

[0019] On the other hand, the filter regeneration method for a denitrification facility according to the present invention includes the steps of: installing a filter regeneration device on top of a filter mounted in the denitrification facility; moving a cleaning substance spray nozzle connected to the filter regeneration device and spraying dry ice toward the filter to clean the filter; and moving a coating substance spray nozzle connected to the filter regeneration device and spraying a coating substance toward the cleaned filter to coat the filter.

[0020] In the cleaning step and the coating step, the cleaning substance spray nozzle and the coating substance spray nozzle can be moved in a first direction and in a second direction intersecting the first direction.

[0021] The filter regeneration method for the denitrification equipment may further include, after the coating step, the step of operating a boiler connected to the denitrification equipment to heat the filter installed in the denitrification equipment. [Effects of the Invention]

[0022] The catalyst regeneration apparatus and method for denitrification equipment according to the present invention have the effect of improving regeneration efficiency and shortening regeneration time by automatically moving the injection nozzle to clean and coat the filter.

[0023] Further, the catalyst regeneration apparatus and method for denitrification equipment according to the present invention not only removes clogging of a filter based on dry ice, but also coats the filter with a catalytically active substance to regenerate the filter, thereby extending the service life of the filter, solving environmental problems caused by waste landfilling, and solving the problem of increased landfill costs.

[0024] The technical effects of the present invention as described above are not limited to the effects mentioned above, and other technical effects not mentioned will be clearly understood by those skilled in the art from the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] [Figure 1] It is a perspective view showing the filter regeneration device of denitrification equipment and the denitrification equipment according to the present embodiment. [Figure 2] It is a perspective view showing the filter regeneration device of denitrification equipment according to the present embodiment. [Figure 3] It is a conceptual diagram showing the filter regeneration device of denitrification equipment according to the present embodiment. [Figure 4] It is a flowchart showing the operation of the filter regeneration device of denitrification equipment according to the present embodiment. [Figure 5] It is a conceptual diagram showing the filter cleaning principle of the filter regeneration device of denitrification equipment according to the present embodiment. DESCRIPTION OF EMBODIMENTS

[0026] Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, the present embodiment is not limited to the embodiments disclosed below, and can be implemented in various forms. The present embodiment is merely provided to complete the disclosure of the present invention and fully inform those skilled in the art of the scope of the invention. Elements in the drawings may be exaggerated in shape and the like for clearer description, and elements denoted by the same reference numeral in the drawings mean the same elements.

[0027] Figure 1 is a perspective view showing the filter regeneration device and denitrification equipment of the denitrification facility according to this embodiment, and Figure 2 is a perspective view showing the filter regeneration device and denitrification equipment of the denitrification facility according to this embodiment. Figure 3 is a conceptual diagram showing the filter regeneration device of the denitrification facility according to this embodiment.

[0028] As shown in Figures 1 to 3, the filter regeneration device 1000 (hereinafter referred to as the filter regeneration device) of the denitrification equipment according to this embodiment comprises a regeneration unit 100 and a control unit 200, and regenerates the filter 30 installed in the denitrification equipment 10.

[0029] Here, the filter 30 may have a honeycomb structure in its cross-section in the height direction, but this is for illustrative purposes only. The cross-section of the filter 30 that is regenerated by the filter regeneration device 1000 can have various shapes, such as a plate structure or a corrugated structure.

[0030] First, the regeneration unit 100 may include a rail module 110, a main body module 120, a nozzle support module 130, a cleaning substance injection nozzle 140, a cleaning substance supply module 150, a coating substance injection nozzle 160, and a coating substance supply module 170.

[0031] The rail module 110 is positioned above the filter 30 and forms a path through which the cleaning substance injection nozzle 140 or the coating substance injection nozzle 160 is transported to the upper side of the filter 30. As an example, the rail module 110 can be positioned on the frame of the denitrification equipment 10 that supports the filter 30.

[0032] Such a rail module 110 may include a first rail frame 111, a second rail frame 112, a first connecting frame 113, and a second connecting frame 114.

[0033] Here, the first rail frame 111 and the second rail frame 112 can be fixedly arranged on the frame of the denitrification equipment 10, spaced apart from each other to have a predetermined distance.

[0034] The first connecting frame 113 connects one end of the first rail frame 111 and the second rail frame 112, and the second connecting frame 114 connects the other end of the first rail frame 111 and the second rail frame 112.

[0035] The main module 120 is connected to the rail module 110 and can be moved along the rail module 110. The main module 120 is reciprocally movable in a first direction along the first rail frame 111 and the second rail frame 112, and the nozzle support module 130 supported in one area is reciprocally movable in a second direction that intersects the first direction.

[0036] As an example, the main module 120 may include a main frame 121, a transfer roller 122, a support frame 123, a first power source 124, and a second power source 125.

[0037] Multiple main frame units 121 can be provided to form a main module 120.

[0038] The transfer rollers 122 are positioned at the bottom of the main frame 121. Multiple transfer rollers 122 are provided to move the main module 120 back and forth in a first direction along the first rail frame 111 and the second rail frame 112.

[0039] The support frame 123 is supported by the main frame 121 and is elongated along the second direction. The support frame 123 forms a path through which the nozzle support module 130 is transported along the second direction.

[0040] The first power source 124 is supported by the main frame 121 and provides power to a plurality of transport rollers 122. The first power source 124 provides power to the transport rollers 122 in response to signals provided from an external source, enabling the plurality of transport rollers 122 to reciprocate along the first rail frame 111 and the second rail frame 112 in a first direction. Here, the first power source 124 may, but is not limited to, a motor.

[0041] The second power source 125 is supported by the main frame 121 and provides power to the nozzle support module 130. The second power source 125 provides power to the nozzle support module 130 in response to signals provided from an external source, enabling the nozzle support module 130 to reciprocate along the support frame 123 in a second direction. Here, the second power source 125 can provide power to the nozzle support module 130 based on a motor, rack and pinion structure, conveyor structure, actuator, etc., but the type of the second power source 125 is not limited.

[0042] The nozzle support module 130 can be used to attach or detach either the cleaning substance spray nozzle 140 or the coating substance spray nozzle 160 together or selectively. The nozzle support module 130 is used by a second power source 125 to reciprocate the cleaning substance spray nozzle 140 or the coating substance spray nozzle 160 along the support frame 123 in a second direction.

[0043] The cleaning substance injection nozzle 140 then injects dry ice pellets toward the filter 30. The cleaning substance injection nozzle 140 is connected to the cleaning substance supply module 150 via a connecting tube. The cleaning substance injection nozzle 140 can inject dry ice pellets supplied from the cleaning substance supply module 150 toward the filter 30, thereby cleaning the filter 30.

[0044] The cleaning substance supply module 150 then ensures that dry ice pellets are supplied to the cleaning substance injection nozzle 140 based on compressed air.

[0045] The coating substance injection nozzle 160 then sprays an aqueous solution of vanadium pentoxide, a catalytic active substance, toward the filter 30, which has been cleaned by dry ice pellets. For example, if the filter 30 is not severely poisoned, the denitrification efficiency can be restored by dry ice pellets alone. However, if the poisoning is severe, spraying the vanadium pentoxide aqueous solution onto the filter 30 to coat it can restore it to like-new condition. Such a coating substance injection nozzle 160 is connected to a coating substance supply module 170 via a connecting tube. This allows the coating substance injection nozzle 160 to spray the active substance supplied from the coating substance supply module 170 toward the filter 30, ultimately regenerating the filter 30.

[0046] The coating material supply module 170 then ensures that a pre-stored vanadium pentoxide aqueous solution is supplied to the coating material injection nozzle 160 via a connecting tube.

[0047] On the other hand, the control unit 200 can control the overall operation of the regeneration unit 100. For example, the control unit 200 may include a power control module 210 and a supply control module 220.

[0048] The power control module 210 can be supported by the main module 120. The power control module 210 can control the first power source 124 to reciprocate the nozzle support module 130 in a first direction, and can control the second power source 125 to reciprocate the nozzle support module 130 in a second direction.

[0049] The supply control module 220 can be connected to the cleaning substance supply module 150 and the coating substance supply module 170. The supply control module 220 controls the cleaning substance supply module 150 and the coating substance supply module 170 so that compressed air and dry ice pellets are supplied to the cleaning substance injection nozzle 140 and the active substance is supplied to the coating substance injection nozzle 160.

[0050] On the other hand, the operation of the filter regeneration device of the denitrification equipment according to this embodiment will be described below with reference to the attached drawings. However, detailed explanations of the above-mentioned components will be omitted, and they will be described using the same reference numerals.

[0051] Figure 4 is a flowchart showing the operation of the filter regeneration device of the denitrification equipment according to this embodiment, and Figure 5 is a conceptual diagram showing the filter cleaning principle of the filter regeneration device of the denitrification equipment according to this embodiment.

[0052] As shown in Figures 4 and 5, the filter regeneration device 1000 according to this embodiment can be transported by an operator to the environment where the denitrification equipment 10 is located in order to regenerate the filter 30 of the denitrification equipment 10. The operator then dismantles the denitrification equipment 10 to expose the upper part of the filter 30.

[0053] Subsequently, the worker can install the rail module 110 on the frame of the denitrification equipment 10 (S100). Here, the first rail frame 111 and the second rail frame 112 can be installed to correspond to the frame spacing of the denitrification equipment 10, but as an example, they can be installed at intervals of 80 cm to 120 cm. Then, the worker connects one end of the first rail frame 111 and the second rail frame 112 with the first connecting frame 113, and connects the other end of the first rail frame 111 and the second rail frame 112 with the second connecting frame 114, thereby maintaining the rail module 110 in a solid state.

[0054] Meanwhile, once the rail module 110 is installed, the worker installs the main module 120 onto the rail module 110. At this time, the worker installs the main module 120 so that the transport rollers 122 can be moved along the first rail frame 111 and the second rail frame 112.

[0055] The operator then fastens the cleaning substance spray nozzle 140 to the nozzle support module 130 to fix the cleaning substance spray nozzle 140 to the nozzle support module 130. The operator then controls the supply control module 220 so that dry ice pellets and compressed air are supplied from the cleaning substance supply module 150 to the cleaning substance spray nozzle 140 via the connecting tube (S200). The operator then controls the power control module 210 so that the regeneration unit 100 moves the cleaning substance spray nozzle 140 in the first and second directions so that the cleaning process for the filter 30 is performed (S300).

[0056] As an example, the regeneration unit 100 moves the cleaning substance spray nozzle 140 in a first direction in response to a signal provided from an external source. Here, the movement interval of the cleaning substance spray nozzle 140 can be set to a predetermined distance, but it is also possible to adjust the movement interval of the cleaning substance spray nozzle 140 by the operator.

[0057] At this time, the cleaning substance injection nozzle 140 is moved in the first direction for a set distance, so that the dry ice pellets and compressed air injected from the cleaning substance injection nozzle 140 are injected toward the honeycomb of the filter 30, thereby cleaning the honeycomb. Here, the injection pressure of the dry ice pellets and compressed air may be between 4 bar and 8 bar, but is not limited to this. However, if the compressed air is injected at a pressure below the set range, the removal of the toxic substance may not be carried out smoothly, and if the compressed air is injected at a pressure above the set range, damage to the filter 30 may occur.

[0058] Then, when dry ice pellets and compressed air are sprayed toward the honeycomb, the toxic substances in the pores of the filter 30 can be crushed and removed by the collision kinetic energy with the dry ice pellets. At this time, the fine particles of dry ice inside the honeycomb sublimate after penetration (expanding in volume 500 to 800 times), and the toxic substances are discharged from inside the pores to the outside. In other words, the instantaneous vacuum created by the dry ice particles rapidly passing between the inner walls of the honeycomb discharges the toxic substances inside the pores to the outside, allowing the honeycomb to be regenerated.

[0059] Subsequently, once the cleaning substance spray nozzle 140 has completed regeneration on the honeycomb, the regeneration unit 100 can move the cleaning substance spray nozzle 140 by a distance set in a second direction. That is, the regeneration unit 100 can move the cleaning substance spray nozzle 140 to the upper part of an adjacent honeycomb in the second direction, and the cleaning substance spray nozzle 140 sprays dry ice pellets and compressed air onto the moved honeycomb to clean it.

[0060] Subsequently, once the cleaning substance spray nozzle 140 has completed cleaning one row of honeycomb arranged in the second direction, the regeneration unit 100 can move the cleaning substance spray nozzle 140 a distance set in the first direction and regenerate the other rows of honeycomb arranged in the second direction.

[0061] Meanwhile, once the cleaning of the filter 30 is complete, the operator separates the cleaning substance spray nozzle 140 from the nozzle support module 130 and tightens the coating substance spray nozzle 160 to fix it to the nozzle support module 130.

[0062] The operator then controls the supply control module 220 so that the catalytic active material is supplied from the coating material supply module 170 to the coating material injection nozzle 160 via the connecting tube. The operator then controls the power control module 210 so that the regeneration unit 100 moves the coating material injection nozzle 160 in the first and second directions so that the coating process on the filter 30 is carried out (S400).

[0063] As an example, the regeneration unit 100 moves the coating material spray nozzle 160 in a first direction in response to a signal provided from an external source. Here, the transport interval of the coating material spray nozzle 160 can be set to a predetermined distance, but it is also possible to adjust the transport interval of the coating material spray nozzle 160 by the operator's control.

[0064] At this time, the coating substance injection nozzle 160 is moved in the first direction by a set distance, so that the active substance injected from the coating substance injection nozzle 160 is injected toward the honeycomb of the filter, thereby coating the honeycomb.

[0065] Subsequently, once the coating substance spray nozzle 160 has completed coating the honeycomb, the regeneration unit 100 can move the coating substance spray nozzle 160 by a distance set in a second direction. That is, the regeneration unit 100 can move the coating substance spray nozzle 160 to the upper part of an adjacent honeycomb in the second direction, and the coating substance spray nozzle 160 sprays the active substance onto the moved honeycomb to coat it.

[0066] Subsequently, once the coating material spray nozzle 160 has completed coating one row of honeycomb arranged in the second direction, the regeneration unit 100 can move the coating material spray nozzle 160 a distance set in the first direction and coat the other rows of honeycomb arranged in the second direction.

[0067] Finally, once the regeneration of the filter 30 is complete, the operator terminates the operation of the regeneration unit 100 and disconnects the filter regeneration device 1000. Then, the operator starts the boiler (not shown) connected to the denitrification equipment 10 (S500).

[0068] Generally, in the regeneration of the filter 30 separated from the denitrification equipment 10, a separate drying and firing process may be required during coating. However, in the regeneration unit 100 according to this embodiment, since the filter 30 is regenerated while still installed in the denitrification equipment 10, a separate drying and firing process is not required. The drying and firing of the filter 30 can be performed by operating the boiler of the denitrification equipment 10. In other words, drying and firing are performed using the waste heat of the exhaust gas discharged from the boiler, eliminating the need for a separate drying and firing process.

[0069] Thus, the catalyst regeneration apparatus and method for denitrification equipment according to the present invention have the effect of automatically transporting the injection nozzle to clean and coat the filter, thereby improving regeneration efficiency and shortening the regeneration time.

[0070] Furthermore, the catalyst regeneration apparatus and method for denitrification equipment according to the present invention not only removes filter clogging using dry ice, but also regenerates the filter by coating it with an active substance, thereby extending the filter's lifespan and solving environmental problems caused by waste landfill and reducing the increase in landfill costs.

[0071] The embodiment described above and shown in the drawings should not be construed as limiting the technical idea of ​​the present invention. The scope of protection of the present invention is limited only by the matters described in the claims, and a person with ordinary skill in the art of the present invention may modify and improve the technical idea of ​​the present invention in various ways. Accordingly, such modifications and improvements will fall within the scope of protection of the present invention, insofar as they are obvious to a person with ordinary skill.

Claims

1. A main module positioned above the filter installed in the denitrification equipment and transported in a first direction, A nozzle support module supported by the main body module and reciprocating in a second direction intersecting the first direction, A coating material spray nozzle, which is detachable from the nozzle support module and sprays the coating material toward the filter located at the bottom, Before the coating substance is sprayed, a cleaning substance spray nozzle is mounted on the nozzle support module and sprays dry ice toward the filter located below, A power control module controls the operation of the main unit module and the nozzle support module so that the cleaning substance injection nozzle and the coating substance injection nozzle are moved along the filter in the first direction and the second direction, respectively. Equipped with, The aforementioned dry ice particles are A filter regeneration device for a denitrification system that causes the toxic substance of the filter to penetrate the pores of the filter and then sublimate, thereby discharging the toxic substance from the pores of the filter to the outside.

2. The cleaning substance supply module further provides dry ice and compressed air to the cleaning substance injection nozzle, The cleaning substance supply module is The filter regeneration device for a denitrification facility according to claim 1, characterized in that the injection pressure of the dry ice and the compressed air is adjusted to 4 bar to 8 bar.

3. The dry ice sprayed toward the filter is The filter regeneration device for a denitrification facility according to claim 1, characterized in that it instantaneously forms a vacuum between the inner walls of the filter to discharge the toxic substance from the filter.

4. The coating material injection nozzle further comprises a coating material supply module that provides the coating material, The aforementioned coating material is A filter regeneration device for a denitrification facility according to claim 1, characterized by containing an aqueous solution of vanadium pentoxide.

5. The filter regeneration device for a denitrification facility according to claim 1, characterized in that, after the coating substance injection nozzle injects the coating substance toward the filter, a boiler connected to the denitrification facility is operated to heat the filter installed in the denitrification facility.

6. The filter regeneration device for a denitrification facility according to claim 1, further comprising a rail module which can be installed above the filter and which forms a path through which the main body module is transported in the first direction.

7. The main module is, The main frame and A transport roller is positioned between the main frame and the rail module to allow the main frame to move along the rail module, A support frame supported by the main frame and forming a path through which the nozzle support module is transported in the second direction, A first power source that provides power to the transfer roller to move the main module in the first direction, A second power source that provides power to the nozzle support module to move the nozzle support module along the support frame in the second direction, A filter regeneration device for a denitrification facility according to claim 6, characterized by comprising the above.

8. The aforementioned rail module is A first rail frame and a second rail frame are spaced apart from each other and provided along the frame of the denitrification equipment in the first direction, A connecting frame that connects the first rail frame and the second rail frame described above, A filter regeneration device for a denitrification facility according to claim 6, characterized by comprising the above.

9. The aforementioned power control module is The filter regeneration device for a denitrification facility according to claim 1, characterized in that the nozzle support module is moved in the first direction and the second direction according to a predetermined rule.

10. The aforementioned power control module is The filter regeneration device for a denitrification facility according to claim 9, characterized in that the nozzle support module is controlled to move across the entire upper region of the filter.

11. The steps include installing a filter regeneration device on top of the filter attached to the denitrification equipment, A cleaning step comprising moving a cleaning substance spray nozzle connected to the filter regeneration device and spraying dry ice toward the filter to clean the filter, wherein the fine particles of the dry ice penetrate the pores of the filter and sublimate, thereby discharging the toxic substances from the filter through the pores to the outside, The steps include moving a coating substance spray nozzle connected to the filter regeneration device and spraying the coating substance toward the filter after cleaning to coat the filter, Includes, In the cleaning step and the coating step, A method for regenerating a filter in a denitrification facility, characterized by moving the cleaning substance injection nozzle and the coating substance injection nozzle in a first direction and a second direction intersecting the first direction.

12. After the coating step, The method for regenerating a filter in a denitrification facility according to claim 11, further comprising the step of operating a boiler connected to the denitrification facility to heat the filter installed in the denitrification facility.

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