CN102500188A - Wet type electric dust-removing device - Google Patents

Wet type electric dust-removing device Download PDF

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Publication number
CN102500188A
CN102500188A CN2011103754755A CN201110375475A CN102500188A CN 102500188 A CN102500188 A CN 102500188A CN 2011103754755 A CN2011103754755 A CN 2011103754755A CN 201110375475 A CN201110375475 A CN 201110375475A CN 102500188 A CN102500188 A CN 102500188A
Authority
CN
China
Prior art keywords
wet
positive plate
smoke
tower
esp
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN2011103754755A
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Chinese (zh)
Inventor
舒英钢
葛介龙
周钓忠
郑秋红
戴永阳
周超炯
王辉
傅峡
裴磊
刘大华
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ZHEJIANG FEIDA DESULFURATION ENGINEERING Co Ltd
Zhejiang Feida Environmental Science and Technology Co Ltd
Original Assignee
ZHEJIANG FEIDA DESULFURATION ENGINEERING Co Ltd
Zhejiang Feida Environmental Science and Technology Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by ZHEJIANG FEIDA DESULFURATION ENGINEERING Co Ltd, Zhejiang Feida Environmental Science and Technology Co Ltd filed Critical ZHEJIANG FEIDA DESULFURATION ENGINEERING Co Ltd
Priority to CN2011103754755A priority Critical patent/CN102500188A/en
Publication of CN102500188A publication Critical patent/CN102500188A/en
Pending legal-status Critical Current

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Abstract

The invention discloses a wet type electric dust-removing device. The wet type electric dust-removing device comprises a wet type absorption tower, a smoke guide pipeline, a wet type electric dust collector and a smoke discharge pipeline, wherein a smoke inlet is formed on the wet type absorption tower; the front end of the smoke guide pipeline is connected to the upper end of the wet type absorption tower; the rear end of the smoke guide pipeline is connected to the upper end of the wet type electric dust collector; the front end of the smoke discharge pipeline is connected to the lower end of the wet type electric dust collector; the rear end of the smoke discharge pipeline is communicated with a chimney; the wet type electric dust collector is arranged vertically; and the smoke passes through the wet type electric dust collector from top to bottom and then enters the smoke discharge pipeline. The wet type electric dust collector is arranged below the rear end of the smoke guide pipeline, so that the smoke flows downwards, flushing liquid on an anode plate flows downstream, the flowing direction of the flushing liquid is consistent with that of the smoke, the anode plate can collect fine particles and aerosol in the smoke conveniently, composite pollutants can be removed efficiently from the smoke, environmental pollution is reduced, and the increasing atmospheric emission standard is met.

Description

A kind of wet-esp device
Technical field
The present invention relates to environmental technology field, particularly a kind of wet-esp device.
Background technology
Along with people's improves constantly combined pollutants such as fine dust, acid mist, heavy metal harm environment and healthy understanding; Impel improving constantly of atmosphere pollutants emission standards; New discharge standard requires the emission level of pollutants such as fine particle, acid mist, heavy metal lower; Traditional smoke absorption device has part pollutant in the flue gas controls effect preferably, but fine dust, heavy metal, SO 3Combined pollutants such as acid mist are still is paid close attention to and is needed an eager difficult problem that solves.
After flue gas washs through the absorption tower, unabsorbed fine dust, SO 3Combined pollutants such as acid mist not only produce secondary pollution, the more important thing is to produce serious harm to people's health.So-called " gypsum rain " often can be seen in the downstream of chimney wind direction, or " blue smoke " of long cigarette tail arranged.Continuous development along with industry; The atmosphere combined pollutant is more and more serious to the harm that environment causes; The technology of combined pollutant still can not reach desirable effect in the existing removal flue gas, therefore very be necessary to probe into a kind of new, efficiently remove fine dust, SO 3The technology of combined pollutants such as acid mist reduces environmental pollution.
As the terminal fine processing equipment of atmosphere combined pollutant, wet electrical dust precipitator can be used for controlling the discharging of materials such as acid mist, fine dust, mercury, metal.As far back as 1907, wet electrical dust precipitator (WESP) technology just has been employed removed acid mist plumage cigarette, and along with the continuous development of technology, WESP constantly is generalized to a plurality of industrial circles.In the test that the coal-burning power plant uses, show that WESP can remove fine dust, the SO more than 90% 3Smog, and can reach the discharging of near-zero turbidity, the WESP technology can also be used to remove mercury, absorption portion SO in addition 2And HCl.Pressure drop is little, simple to operate, energy consumption is little because of having, movement-less part, maintenance cost are low, dust removal performance and high reliability features more and more receive people's attention as flue gas terminal fine processing equipment for WESP.
Summary of the invention
Problem to be solved by this invention just provides a kind of wet-esp device, and is simple in structure, easy to use, efficiently removes fine particle and SO simultaneously 3Deng the aerosol that forms, alleviate equipment obstruction, chimney corrosion, can solve technical barriers such as " chimney rain ", " gypsum rain ", " blue smoke ", reach environmental requirement.
In order to solve the problems of the technologies described above; The present invention adopts following technical scheme: a kind of wet-esp device is characterized in that: comprise wet-type absorption tower, fire tube flue, wet electrical dust precipitator and smoke discharging pipe, on wet-type absorption tower, be provided with smoke inlet; The front end of fire tube flue is connected the wet-type absorption tower upper end; The rear end of fire tube flue is connected the wet electrical dust precipitator upper end, and the front end of smoke discharging pipe is connected the lower end of wet electrical dust precipitator, and the rear end of smoke discharging pipe is communicated with chimney; Said wet electrical dust precipitator vertically is provided with, and flue gas gets into smoke discharging pipe through wet electrical dust precipitator from the top down.
Further; Said wet-type absorption tower comprises that tower body peace is to first spray thrower that is located at the tower body internal upper part; The tower body upper end is connected with the front end of fire tube flue, and the tower body bottom is provided with the spray liquid pool, and said smoke inlet is located at the position between first spray thrower and spray liquid pool on the tower body; Be provided with circulating pump in the tower body outside, thereby circulating pump is connected with spray liquid pool, first spray thrower respectively through tube connector spray liquid is delivered to first spray thrower from spraying liquid pool.Realize recycling of spray liquid, economize on resources.
Further, the said tower body outside is provided with blower fan, is connected to an end of ajutage on the blower fan, and ajutage stretches into the spray liquid pool, and the other end of ajutage is positioned at tube connector and the junction that sprays liquid pool.Be sent to air in the spray liquid pool through ajutage, spray liquid is carried out oxidation.
Further, be provided with agitator in the said spray liquid pool.Make the air that blasts in spray liquid even distribution and prevent to contain the sedimentation of solid material.
Further, be provided with deflector in the said fire tube flue.Make flue gas evenly flow into wet electrical dust precipitator.
Further; Said wet electrical dust precipitator comprises housing, second spray thrower, at least two positive plates and at least one group of cathode frame; The housing upper end is connected with the rear end of fire tube flue, and the vertical secured in parallel of positive plate vertically is provided with at least one group of cathode frame in twos between the positive plate in housing; Be provided with many cathode line in the cathode frame; Cathode line is electrically connected with external power source through lead, and second spray thrower is flat to being fixed on housing top and being positioned at positive plate and the cathode frame top, and outside is provided with water pump and is connected with second spray thrower through first water pipe.
Further; Said housing upper end is provided with positive plate hanger and negative electrode hanger, and the positive plate hanger is positioned at negative electrode hanger top, and the positive plate upper end is fixed on the positive plate hanger; The cathode frame upper end is fixed on the negative electrode hanger; The housing lower end is provided with the positive plate bracing frame, and the positive plate lower end is fixed on the positive plate bracing frame, and the distance between the close in twos positive plate is 300~450mm.
Further; Preceding half section of said smoke discharging pipe is the U-shaped section, and the front end of U-shaped section is connected with the lower end of housing, and the rear end of U-shaped section was connected with the second half section of smoke discharging pipe; The front end inner flat of U-shaped section is to being provided with one deck multihole distributor at least; The percent opening of multihole distributor is greater than 30%, and the bottom of U-shaped section is provided with liquid trap, is connected to mozzle on the liquid trap and is connected in the spray liquid pool.The U-shaped section is set, is convenient to the contaminant fluid that liquid trap is collected the positive plate surface collection.
Further, said U-shaped Duan Zhongyu liquid trap corresponding position is provided with the blinds grid, the blinds grid along flue gas flow direction be inclined upwardly be provided with and and flue gas flow direction between angle be 30 °~65 °.Reduce liquid foam entrainment, bubble crushing.
Further, the second half section of said smoke discharging pipe, to section, flat front end to section was provided with the ripple demister for flat, and the place ahead of ripple demister vertically is provided with the 3rd spray thrower, and the 3rd spray thrower is connected with water pump through second water pipe.Flat be higher than the U-shaped section, make the unlikely inflow ripple of the contaminant fluid demister of positive plate surface collection, guarantee the long-term normal use of the 3rd spray thrower and ripple demister to section.
After adopting technique scheme, the present invention has following advantage: wet electrical dust precipitator is arranged on below, fire tube flue rear end, and flue gas is flowed downward; Flushing liquor following current on the positive plate is downward; Direction is consistent with flue gas flow direction, be convenient to positive plate and collect fine particle and aerosol in the flue gas, has realized efficiently removing of combined pollutant in the flue gas; Reduce environmental pollution, satisfied the atmospheric emission standard that improves constantly.
Description of drawings
Below in conjunction with accompanying drawing the present invention is described further:
Fig. 1 is the structural representation of an embodiment of the present invention.
The specific embodiment
The structural representation of an embodiment of the present invention as shown in Figure 1; A kind of wet-esp device comprises wet-type absorption tower 1, fire tube flue 2, wet electrical dust precipitator 3 and smoke discharging pipe 4, on wet-type absorption tower, is provided with smoke inlet 10; The front end of fire tube flue is connected the wet-type absorption tower upper end; The rear end of fire tube flue is connected the wet electrical dust precipitator upper end, and the front end of smoke discharging pipe is connected the lower end of wet electrical dust precipitator, and the rear end of smoke discharging pipe is communicated with chimney 9; Said wet electrical dust precipitator vertically is provided with, and flue gas gets into smoke discharging pipe through wet electrical dust precipitator from the top down.
In the above-described embodiments; Said wet-type absorption tower comprises that tower body 11 peace are to first spray thrower 12 that is located at the tower body internal upper part; The tower body upper end is connected with the front end of fire tube flue, and the tower body bottom is provided with spray liquid pool 13, and said smoke inlet is located at the position between first spray thrower and spray liquid pool on the tower body; Be provided with circulating pump 14 in the tower body outside, thereby circulating pump is connected with spray liquid pool, first spray thrower respectively through tube connector 15 spray liquid is delivered to first spray thrower from spraying liquid pool.Demister is not set in the wet-type absorption tower usually, in case of necessity, 1~2 grade of flat or ridge type demister can be set also.Here, the front end of fire tube flue also can directly and on the tower body be wholely set.
On the said structure basis, to do further to improve, the tower body outside is provided with blower fan 16, is connected to an end of ajutage 17 on the blower fan, and ajutage stretches into the spray liquid pool, and the other end of ajutage is positioned at tube connector and the junction that sprays liquid pool.Can also in the spray liquid pool, agitator 18 be set.
On the architecture basics of the foregoing description; Deflector 21 is set in the fire tube flue; Make flue gas evenly enter into wet electrical dust precipitator by fire tube flue, confirm the version and the installation site of deflector through numerical simulation and physical model calculating, material requirements is corrosion-resistant and wear-resistant.
In the above-described embodiments; Said wet electrical dust precipitator comprises housing 31, second spray thrower 32, at least two positive plates 33 and at least one cathode frames 34; The quantity of positive plate and cathode frame decides according to the size of wet electrical dust precipitator, is provided with five positive plates and four cathode frames in the present embodiment.The housing upper end is connected with the rear end of fire tube flue; The vertical secured in parallel of positive plate is in housing; A cathode line vertically is set between the positive plate in twos; Cathode line is electrically connected with external power source 35 through lead, and second spray thrower is flat to being fixed on housing top and being positioned at positive plate and the cathode frame top, and outside is provided with water pump 5 and is connected with second spray thrower through first water pipe 36.Specifically, the housing upper end is provided with positive plate hanger 37 and negative electrode hanger 38, and the positive plate hanger is positioned at negative electrode hanger top; The positive plate upper end is fixed on the positive plate hanger; The cathode frame upper end is fixed on the negative electrode hanger, and the housing lower end is provided with positive plate bracing frame 39, and the positive plate lower end is fixed on the positive plate bracing frame; Distance between the close in twos positive plate is 300~450mm, general preferred 300mm, 350mm, 400mm or 450mm.The height of positive plate can confirm that general height change scope is at 4~8m according to on-the-spot site condition and design demand; The rectangular tube of band acupuncture that cathode line is preferred has lower discharge inception voltage and can produce strong corona.Second spray thrower sprays to positive plate continuously, and the flushing liquor following current on the positive plate is downward, and direction is consistent with flue gas flow direction; Positive and negative surface at positive plate forms even liquid film; But the electric conductivity on holding anode plate surface is beneficial to charged particle anode surface and moves, and improves dust catching efficiency.The interior environmental conditions of wet electrical dust precipitator is abominable; Therefore the material of its internal structure all should adopt anti-corrosion material; Prevent that flushing liquor from causing corrosion to structure, positive plate adopts stainless steel usually or has the glass fibre (FRP) of surface conductance performance, and cathode line is used stainless steel material and made.In the present embodiment; Wet electrical dust precipitator is set to single-stage; To fine particle and aerocolloidal removal efficiency is 90~99%; Secondary, three grades also can be set ... It is 99~99.99% to fine particle and aerosol removal efficiency that two to three grades of wet electrical dust precipitators are set, and therefore generally can not be provided with above three grades.
Preceding half section of said smoke discharging pipe is U-shaped section 41; The front end of U-shaped section is connected with the lower end of housing, and the rear end of U-shaped section was connected with the second half section of smoke discharging pipe, and the front end inner flat of U-shaped section is to being provided with one deck multihole distributor 42 at least; The percent opening of multihole distributor is greater than 30%; Prevent to stop up, need to adopt corrosion-resistant material, can guarantee the stable of the interior air velocity distribution of wet electrical dust precipitator; The bottom of U-shaped section is provided with liquid trap 43, is connected to mozzle 44 on the liquid trap and is connected in the spray liquid pool.The solid matter that contains indissoluble in the contaminant fluid of positive plate surface collection; Deposition is stopped up easily, and has very strong acid, caustic corrosion property, and liquid trap is to collect and wash the contaminant fluid that contains the indissoluble solid matter to positive plate to collect from flowing back in the spray liquid pool of wet-type absorption tower; And formation fluid-tight; Mozzle should have certain downward-sloping gradient, is convenient to contaminant fluid and flows into the spray liquid pond, is difficult for stopping up.
This external U-shaped Duan Zhongyu liquid trap corresponding position is provided with blinds grid 45, the blinds grid along flue gas flow direction be inclined upwardly be provided with and and flue gas flow direction between angle be 30~65 °, preferred 30 °, 45 ° or 60 °.Specifically, the blinds grid is arranged in the U-shaped section position of level relatively, can reduce the effect of liquid foam entrainment and bubble crushing, should adopt the material of decay resistance, is generally polypropylene (PP), polyvinyl chloride (PVC), FRP etc.The second half section of smoke discharging pipe, to section 46, flat front end to section was provided with ripple demister 47 for flat, and the place ahead of ripple demister vertically is provided with the 3rd spray thrower 48, the three spray throwers and is connected with water pump through second water pipe 49.The ripple demister is interrupted the flushing clean surface by the 3rd spray thrower, guarantees the demister surface clean, and inside is not stopped up.
In the foregoing description; Flue gas gets into wet-type absorption tower through smoke inlet, through circulating pump spray liquid is delivered to first spray thrower, after the atomizing of first spray thrower, the target components in the flue gas is washed absorption; Low-temperature flue gas after the washing evenly enters into wet electrical dust precipitator through fire tube flue; Through removing fine particle and the aerosol in the flue gas behind the electric precipitation,, enter atmosphere through chimney 9 after be purified after the smoke discharging pipe demist.The present invention has realized efficiently removing of combined pollutant in the flue gas, has reduced environmental pollution, has satisfied the atmospheric emission standard that improves constantly.
Except that above-mentioned preferred embodiment, the present invention also has other embodiment, and those skilled in the art can make various changes and distortion according to the present invention, only otherwise break away from spirit of the present invention, all should belong to the defined scope of accompanying claims of the present invention.

Claims (10)

1. wet-esp device; It is characterized in that: comprise wet-type absorption tower (1), fire tube flue (2), wet electrical dust precipitator (3) and smoke discharging pipe (4); On wet-type absorption tower, be provided with smoke inlet (10), the front end of fire tube flue is connected the wet-type absorption tower upper end, and the rear end of fire tube flue is connected the wet electrical dust precipitator upper end; The front end of smoke discharging pipe is connected the lower end of wet electrical dust precipitator; The rear end of smoke discharging pipe is communicated with chimney (9), and said wet electrical dust precipitator vertically is provided with, and flue gas gets into smoke discharging pipe through wet electrical dust precipitator from the top down.
2. a kind of wet-esp device according to claim 1; It is characterized in that: said wet-type absorption tower comprises that tower body (11) peace is to first spray thrower (12) that is located at the tower body internal upper part; The tower body upper end is connected with the front end of fire tube flue; The tower body bottom is provided with spray liquid pool (13); Said smoke inlet is located on the tower body position between first spray thrower and spray liquid pool, is provided with circulating pump (14) in the tower body outside, circulating pump through tube connector (15) thus be connected with spray liquid pool, first spray thrower respectively spray liquid be delivered to first spray thrower from spraying liquid pool.
3. a kind of wet-esp device according to claim 2; It is characterized in that: the said tower body outside is provided with blower fan (16); Be connected to an end of ajutage (17) on the blower fan, ajutage stretches into the spray liquid pool, and the other end of ajutage is positioned at tube connector and the junction that sprays liquid pool.
4. according to claim 2 or 3 described a kind of wet-esp devices, it is characterized in that: be provided with agitator (18) in the said spray liquid pool.
5. a kind of wet-esp device according to claim 1 and 2 is characterized in that: be provided with deflector (21) in the said fire tube flue.
6. a kind of wet-esp device according to claim 1; It is characterized in that: said wet electrical dust precipitator comprises housing (31), second spray thrower (32), at least two positive plates (33) and at least one group of cathode frame (34); The housing upper end is connected with the rear end of fire tube flue; The vertical secured in parallel of positive plate is in housing; At least one group of cathode frame vertically is set between the positive plate in twos, is provided with many cathode line in the cathode frame, cathode line is electrically connected with external power source (35) through lead; Second spray thrower is flat to being fixed on housing top and being positioned at positive plate and the cathode frame top, and outside is provided with water pump (5) and is connected with second spray thrower through first water pipe (36).
7. a kind of wet-esp device according to claim 6; It is characterized in that: said housing upper end is provided with positive plate hanger (37) and negative electrode hanger (38), and the positive plate hanger is positioned at negative electrode hanger top, and the positive plate upper end is fixed on the positive plate hanger; The cathode frame upper end is fixed on the negative electrode hanger; The housing lower end is provided with positive plate bracing frame (39), and the positive plate lower end is fixed on the positive plate bracing frame, and the distance between the close in twos positive plate is 300~450mm.
8. a kind of wet-esp device according to claim 1; It is characterized in that: preceding half section of said smoke discharging pipe is U-shaped section (41), and the front end of U-shaped section is connected with the lower end of housing, and the rear end of U-shaped section was connected with the second half section of smoke discharging pipe; The front end inner flat of U-shaped section is to being provided with one deck multihole distributor (42) at least; The percent opening of multihole distributor is greater than 30%, and the bottom of U-shaped section is provided with liquid trap (43), is connected to mozzle (44) on the liquid trap and is connected in the spray liquid pool.
9. a kind of wet-esp device according to claim 8 is characterized in that: said U-shaped Duan Zhongyu liquid trap corresponding position is provided with blinds grid (45), the blinds grid along flue gas flow direction be inclined upwardly be provided with and and flue gas flow direction between angle be 30~65 °.
10. according to claim 1 or 8 described a kind of wet-esp devices; It is characterized in that: the second half section of said smoke discharging pipe is for putting down to section (46); Flat front end to section is provided with ripple demister (47); The place ahead of ripple demister vertically is provided with the 3rd spray thrower (48), and the 3rd spray thrower is connected with water pump through second water pipe (49).
CN2011103754755A 2011-11-23 2011-11-23 Wet type electric dust-removing device Pending CN102500188A (en)

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CN2011103754755A CN102500188A (en) 2011-11-23 2011-11-23 Wet type electric dust-removing device

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103994453A (en) * 2014-05-30 2014-08-20 上海迪夫格环境科技有限公司 Guide vane device for wet flue gas flue
CN104801138A (en) * 2015-04-16 2015-07-29 迁安市九江线材有限责任公司 Dedusting and dehydration device capable of improving wet dedusting effect
CN106139850A (en) * 2016-08-26 2016-11-23 江苏中圣高科技产业有限公司 A kind of energy-efficient gas-liquid coupling oxidation sweetening denitrification apparatus
CN106390654A (en) * 2016-10-20 2017-02-15 广西金邦泰科技有限公司 Efficient dust collecting equipment for chemical powder processing process
CN107754578A (en) * 2017-10-20 2018-03-06 佛山市莫森环境工程有限公司 A kind of industry coal-boiler flue gas minimum discharge complete set of equipments

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Publication number Priority date Publication date Assignee Title
CN1994532A (en) * 2006-12-12 2007-07-11 溧阳市溧竹环境工程有限公司 Highly effective wet-process desulfurizing, denitrifying and dedusting process and integration device thereof
CN201524521U (en) * 2009-03-16 2010-07-14 山东山大能源环境有限公司 Large wet desulphurization device with wet-type electrostatic demister
CN202387342U (en) * 2011-11-23 2012-08-22 浙江菲达脱硫工程有限公司 Wet-type electric dedusting device

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1994532A (en) * 2006-12-12 2007-07-11 溧阳市溧竹环境工程有限公司 Highly effective wet-process desulfurizing, denitrifying and dedusting process and integration device thereof
CN201524521U (en) * 2009-03-16 2010-07-14 山东山大能源环境有限公司 Large wet desulphurization device with wet-type electrostatic demister
CN202387342U (en) * 2011-11-23 2012-08-22 浙江菲达脱硫工程有限公司 Wet-type electric dedusting device

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103994453A (en) * 2014-05-30 2014-08-20 上海迪夫格环境科技有限公司 Guide vane device for wet flue gas flue
CN104801138A (en) * 2015-04-16 2015-07-29 迁安市九江线材有限责任公司 Dedusting and dehydration device capable of improving wet dedusting effect
CN106139850A (en) * 2016-08-26 2016-11-23 江苏中圣高科技产业有限公司 A kind of energy-efficient gas-liquid coupling oxidation sweetening denitrification apparatus
CN106139850B (en) * 2016-08-26 2020-01-14 江苏中圣高科技产业有限公司 Energy-efficient gas-liquid coupling oxidation SOx/NOx control device
CN106390654A (en) * 2016-10-20 2017-02-15 广西金邦泰科技有限公司 Efficient dust collecting equipment for chemical powder processing process
CN107754578A (en) * 2017-10-20 2018-03-06 佛山市莫森环境工程有限公司 A kind of industry coal-boiler flue gas minimum discharge complete set of equipments

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