CN104713112B - Boiler dust removal circular processing system - Google Patents

Boiler dust removal circular processing system Download PDF

Info

Publication number
CN104713112B
CN104713112B CN201310680910.4A CN201310680910A CN104713112B CN 104713112 B CN104713112 B CN 104713112B CN 201310680910 A CN201310680910 A CN 201310680910A CN 104713112 B CN104713112 B CN 104713112B
Authority
CN
China
Prior art keywords
water
pump
tank
boiler
communicated
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.)
Active
Application number
CN201310680910.4A
Other languages
Chinese (zh)
Other versions
CN104713112A (en
Inventor
杨军
刘华台
李枝才
王继新
安华军
汤永红
张熔炉
王志
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.)
China Tobacco Guizhou Industrial Co Ltd
Original Assignee
China Tobacco Guizhou Industrial 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 China Tobacco Guizhou Industrial Co Ltd filed Critical China Tobacco Guizhou Industrial Co Ltd
Priority to CN201310680910.4A priority Critical patent/CN104713112B/en
Publication of CN104713112A publication Critical patent/CN104713112A/en
Application granted granted Critical
Publication of CN104713112B publication Critical patent/CN104713112B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Landscapes

  • Separation Of Particles Using Liquids (AREA)

Abstract

The invention provides a boiler dust removal circular processing system. The boiler dust removal circular processing system comprises a main dust remover, an auxiliary dust remover, a reaction tank, a sedimentation tank, a pump chamber water collecting tank and a water cut-off safety protection device. The water cut-off safety protection device is used for independently starting any main circulating water pump and/or auxiliary circulating water pump. The boiler dust removal circular processing system has the following advantages that the water cut-off safety protection device enables any one in all the circulating water pumps to be independently started; two or more circulating water pumps can also be started simultaneously; the operation of the entire set of system is not limited by the water cut-off safety protection device; when the circulating water pumps break down or cannot operate or operate idly or stop due to breakdowns, an electromagnetic valve is started, water is supplied to the boiler dust removers, a sound-light alarm is given out to remind an operator of the breakdown of equipment, and standby water is controlled; when the circulating water pumps operate idly or stop due to the breakdowns, the standby water is automatically supplied, so that the demand for boiler dust removal water is met, and the safe and economical operation of a boiler is protected.

Description

Boiler dusting circulating treating system
Technical field
The present invention relates to boiler circulating water treatment field, more particularly to a kind of boiler dusting circulating treating system.
Background technology
Boiler dust remover is that flue gas enters venturi by flue, is uniformly sprayed into by water in the entrance of throat, due to Flue gas high-speed motion, the water therefore spraying into is melted into the ash material in tiny water smoke wet flue gas by it, and so, ash material is with water droplet just There occurs collision cohesion, the especially tiny dust material in material footpath can be water-soluble by water smoke.
Boiler dust remover is applied to the flue gas ash removal smoke-eliminating desulfurizing of fire coal, oil burning boiler, kiln, have resistance low, install Flexible arrangement, desulfuration efficiency is high, the features such as long service life.
Boiler dust remover can be divided into by principle difference: sound wave dust separator, pulse dust collector, Steam Dust device, cloth bag remove Dirt device etc..
Existing boiler dusting circulates water control system bad environments, seriously corroded, and fault rate is also high, and rule stream filler is forbidden Water shortage is run, once such as water shortage, will result in the rule stream filler fusing within Chimney crack, devulcanizer, causes the logical of boiler flue The potential safety hazard such as wind is not smooth, the life to worker and the safety and economic operation of boiler impact.
Existing boiler dusting circulating treating system cannot realize main deduster and assisted dust-collecting device are individually controlled, So that cycle water energy recycles in all dedusters.
Content of the invention
The shortcoming of prior art in view of the above, it is an object of the invention to provide a kind of boiler dusting circular treatment system System, for solving all dedusters individually cannot be controlled it is impossible to make recirculated water in all dedusters in prior art The problem recycling.
For achieving the above object and other related purposes, the present invention provides a kind of boiler dusting circulating treating system, comprising: Main deduster and assisted dust-collecting device, reaction tank, sedimentation basin, pump house collecting-tank, safety guard of cutting off the water supply, described main deduster and The sewage draining exit of assisted dust-collecting device is communicated to the water inlet of reaction tank, and what the delivery port of described reaction tank was communicated to sedimentation basin enters water Mouthful, the delivery port of described sedimentation basin is communicated to pump house collecting-tank, and the delivery port of described pump house collecting-tank passes through main backflow water pump even Pass to the water inlet of described main deduster, the delivery port of described pump house collecting-tank is communicated to described auxiliary by auxiliary reflux water pump The water inlet of deduster, the water inlet of described main deduster is provided with no water protector, and described safety guard of cutting off the water supply is used for Arbitrary main backflow water pump and/or auxiliary reflux water pump are activated individually.
It is preferred that, described safety guard of cutting off the water supply includes three double two logical torsion sub- change-over switch sa, starts Button sb1, stop button sb2, auxiliary reclay ka, zero line binding post com, the inlet wire of described no water protector and outlet divide It is not connected on the sub- change-over switch of described torsion, plc takes 12 volts of power supplys be followed by start button through the sub- change-over switch sa of described torsion The upper startup power supply as auxiliary reflux water pump of sb1.
It is preferred that, described safety guard of cutting off the water supply includes electrode points pressure gauge p, auxiliary reclay ka, electromagnetism Valve, audible-visual annunciator, time-delay relay kt, described time-delay relay kt, auxiliary reclay ka, magnetic valve, audible-visual annunciator four It is connected to 220v both ends of power through described electrode points pressure gauge p after person's parallel connection.
It is preferred that, described audible-visual annunciator is arranged on operating room, and described magnetic valve is arranged on standby water pipe, institute State electrode points pressure gauge p to be arranged on backflow water pump junction house steward.
It is preferred that, described main deduster includes a deduster, No. two dedusters.
It is preferred that, described sedimentation basin includes first stage precipitation tank and second-level settling pond, the going out of described first stage precipitation tank The mouth of a river is communicated to the water inlet of second-level settling pond, and the delivery port of described second-level settling pond is communicated to described pump house collecting-tank.
It is preferred that, described each deduster is communicated to alternate source by standby water pipe.
It is preferred that, there is lime conveyer in described reaction tank, and mixer.
As described above, a kind of boiler dusting circulating treating system of the present invention, have the advantages that the safe guarantor that cuts off the water supply Protection unit makes all backflow water pumps can be activated individually arbitrary, also can start two or multiple stage, whole system runs and is not subject to simultaneously No water protector limits;When flow back water pump faulty can not operate, pump or the fault stop jumping of fanning the air when, start magnetic valve, to boiler Deduster supplies water, and is simultaneously emitted by sound and light alarm, reminds operating personnel's equipment to break down, standby water is controlled, when water circulating pump is beaten Empty pump or fault stop jumping, standby water automatically opens up, and meets boiler dusting water and the safety and economic operation of protection boiler.
Brief description
Fig. 1 is shown as the structural representation of the embodiment of the present invention.
Fig. 2 is shown as the weak current part circuit diagram of the safety guard of cutting off the water supply of the embodiment of the present invention.
Fig. 3 is shown as the strong power part circuit diagram of the safety guard of cutting off the water supply of the embodiment of the present invention.
Piece mark explanation
1 main deduster
No. 101 dedusters
102 No. two dedusters
103 No. three dedusters
2 assisted dust-collecting devices
3 reaction tanks
4 sedimentation basins
41 first stage precipitation tank
42 second-level settling ponds
5 pump house collecting-tanks
6 no water protectors
7 lime silos
8 hoppers
9 standby water pipes
10 chimneys
11 operating rooms
12 audible-visual annunciators
13 magnetic valves
The double two logical sub- change-over switches of torsion of sa tri-
Sb1 start button
Sb2 stop button
Ka auxiliary reclay
Com zero line binding post
P electrode points pressure gauge
Ka auxiliary reclay
Kt time-delay relay
Specific embodiment
Below by way of specific instantiation, embodiments of the present invention are described, those skilled in the art can be by this specification Disclosed content understands other advantages and effect of the present invention easily.The present invention can also be by addition different concrete realities The mode of applying is carried out or applies, and the every details in this specification can also be based on different viewpoints and application, without departing from Carry out various modifications and changes under the spirit of the present invention.
Refer to Fig. 1 to Fig. 3.It should be noted that the diagram provided in the present embodiment only illustrates this in a schematic way The basic conception of invention, only shows the assembly relevant with the present invention rather than then according to package count during actual enforcement in schema Mesh, shape and size are drawn, and during its actual enforcement, the kenel of each assembly, quantity and ratio can be a kind of random change, and its Assembly layout kenel is likely to increasingly complex.Structure depicted in this specification institute accompanying drawings, ratio, size etc., all only in order to Content disclosed in cooperation specification, so that those skilled in the art understands and reads, being not limited to the present invention can be real The qualifications applied, therefore do not have technical essential meaning, the tune of the modification of any structure, the change of proportionate relationship or size Whole, under not affecting present invention effect that can be generated by and the purpose that can reach, all should still fall in disclosed skill In the range of art content obtains and can cover.Meanwhile, in this specification cited as " on ", D score, "left", "right", " middle " and The term of " one " etc., is merely convenient to understanding of narration, and is not used to limit the enforceable scope of the present invention, its relativeness It is altered or modified, under no essence change technology contents, when being also considered as the enforceable category of the present invention.
Before the embodiment of the present invention is described in detail, first the applied environment of the present invention is described.Existing Boiler dusting circulates water control system and designs, assisted dust-collecting device just for recycling after the dust waste water process of main deduster Operationally can only be for a long time using alternate sources such as well water, in order to reduce the water consumption of assisted dust-collecting device it is contemplated that main deduster Wastewater reuse pipeline draws and is connected on auxiliary furnace deduster, and due to being restricted by no water protector, (whole system runs to be needed to pacify The no water protector being contained on main deduster water pipe collects water pipe hydraulic signal, and auxiliary furnace does not have no water protector, auxiliary Help stove to use recirculated water, need main deduster no water protector to provide hydraulic signal, so only recirculated water simultaneously enters main removing Dirt device, makes main deduster no water protector send hydraulic signal, a whole set of sewage disposal could run, and assisted dust-collecting device could use Recirculated water, so only has shunting to meet no water protector, makes discharge can not meet assisted dust-collecting water demand from face, only Supplement to meet the needs of assisted dust-collecting with a part of well water.
System operation is restricted by no water protector, and using lime desulfurization bad environments, seriously corroded, fault rate is also high, such as Main recirculation water pump breaks down, and the alternate sources such as well water just can only be used as boiler dusting water, cause to process qualified after Arrange outside water.
Rule stream filler forbids water shortage to run, once such as water shortage, will result in the rule stream filler within Chimney crack, devulcanizer and melts Change, cause the potential safety hazard such as ventilation is not smooth of boiler flue, the life to worker and the safety and economic operation of boiler to impact.
Refer to Fig. 1-Fig. 3, the present invention provides a kind of boiler dusting circulating treating system, comprising: main deduster 1 and auxiliary Deduster 2, reaction tank 3, sedimentation basin 4, pump house collecting-tank 5, safety guard of cutting off the water supply, described main deduster and assisted dust-collecting device Sewage draining exit be communicated to the water inlet of reaction tank, the delivery port of described reaction tank is communicated to the water inlet of sedimentation basin, described precipitation The delivery port in pond is communicated to pump house collecting-tank, and the delivery port of described pump house collecting-tank is communicated to described master by main backflow water pump and removes The water inlet of dirt device, the delivery port of described pump house collecting-tank enters water by what auxiliary reflux water pump was communicated to described assisted dust-collecting device Mouthful, the water inlet of described main deduster is provided with no water protector 6, and described safety guard of cutting off the water supply is used for being activated individually arbitrary Platform main backflow water pump and/or auxiliary reflux water pump.In the present embodiment, assisted dust-collecting device 2 is No. three dedusters 103.
Described main deduster includes 101, No. two dedusters 102 of a deduster.10 is chimney.
Described safety guard of cutting off the water supply includes three double two logical torsion sub- change-over switch sa, start button sb1, stop pressing Button sb2, auxiliary reclay ka, zero line binding post com, the inlet wire of described no water protector and outlet are connected on described torsion respectively On change-over switch, plc takes 12 volts of power supplys be followed by conduct in start button sb1 through the sub- change-over switch sa of described torsion and assist back The startup power supply of flowing water pump.
As shown in Fig. 2 operation principle is: double three two logical torsion son switch sa, 12 volts of power supplys are taken on plc, sub when turning round Switch is got to manually, short circuit no water protector, simultaneously to system supplymentary backflow 12 volts of startup power supplies of water pump, after system operation, 3 Backflow water pump can be activated individually arbitrary, also can start two or three backflow water pumps simultaneously;Get to automatically, switch is serially connected in disconnected On water conservation device loop, simultaneously switch off 12 volts of startup power supplies of auxiliary reflux water pump.
Described safety guard of cutting off the water supply includes electrode points pressure gauge p, auxiliary reclay ka, magnetic valve 13, sound and light alarm Device 12, time-delay relay kt, after described time-delay relay kt, auxiliary reclay ka, magnetic valve 13, audible-visual annunciator are in parallel It is connected to 220v both ends of power through described electrode points pressure gauge p.
In Fig. 3, l is 220 volts of power supply terminals, and n is zero terminal, and p is electrode points pressure gauge, and ka is auxiliary reclay, kt It is time delayses relay, kt1It is time delay normally opened contact, ka1It is auxiliary reclay normally opened contact, ka2It is that auxiliary reclay is normally opened Contact.
Circuit connecting mode is: takes 220 power supplys, respectively enters electrode points pressure gauge normally opened contact, normally opened contact goes out To meet time delayses relay kt, to simultaneously enter time-delay relay normally opened contact, normally opened contact out enter audible-visual annunciator and Magnetic valve.
Operation principle is: when flow back water pump faulty can not operate, pump or the fault stop jumping of fanning the air when, there is no hydraulic pressure in pipe, Electrode points connect normally-closed contact, and time delayses relay kt obtains electric time delay 30 seconds and (waits inner pipe water pressure stable, during imitative starting of pump station False alarm) after, normally opened contact closes, and auxiliary reclay ka obtains electric adhesive, starts standby water control system magnetic valve 13, to boiler Deduster supplies water, and audible-visual annunciator sends sound and light alarm signal simultaneously, reminds operating personnel's equipment to break down.
Described audible-visual annunciator is arranged on operating room 11, and described magnetic valve is arranged on standby water pipe 9, and described electrode presses Power table p is arranged on backflow water pump junction house steward.
Described sedimentation basin includes first stage precipitation tank 41 and second-level settling pond 42, and the delivery port of described first stage precipitation tank is communicated to The water inlet of second-level settling pond, the delivery port of described second-level settling pond is communicated to described pump house collecting-tank.
Described each deduster is communicated to alternate source by standby water pipe.Alternate source such as well in case of emergency can be used Water etc..
There are lime conveyer and mixer in described reaction tank.Lime conveyer is provided with lime silo 7, hopper 8.
As described above, the safety guard of cutting off the water supply of the present invention makes all backflow water pumps can be activated individually arbitrary, also may be used Start two or multiple stage, whole system runs and do not limited by no water protector simultaneously;When flowing back, water pump is faulty can not to operate, beat When empty pump or fault stop jumping, start magnetic valve, supply water to boiler dust remover, be simultaneously emitted by sound and light alarm, remind operating personnel to set Standby break down, standby water is controlled, and when water circulating pump fans the air pump or fault stop jumping, standby water automatically opens up, and meets boiler dusting Safety and economic operation with water and protection boiler.
Above-described embodiment only principle of the illustrative present invention and its effect, not for the restriction present invention.Any ripe The personage knowing this technology all can carry out modifications and changes without prejudice under the spirit and the scope of the present invention to above-described embodiment.Cause This, those of ordinary skill in the art is complete with institute under technological thought without departing from disclosed spirit such as All equivalent modifications becoming or change, must be covered by the claim of the present invention.

Claims (8)

1. a kind of boiler dusting circulating treating system is it is characterised in that include: main deduster and assisted dust-collecting device, reaction tank, heavy Shallow lake pond, pump house collecting-tank, safety guard of cutting off the water supply, the sewage draining exit of described main deduster and assisted dust-collecting device is communicated to reaction tank Water inlet, the delivery port of described reaction tank is communicated to the water inlet of sedimentation basin, and the delivery port of described sedimentation basin is communicated to pump house Collecting-tank, the delivery port of described pump house collecting-tank is communicated to the water inlet of described main deduster, described pump by main backflow water pump The delivery port of room collecting-tank is communicated to the water inlet of described assisted dust-collecting device by auxiliary reflux water pump, the entering of described main deduster The mouth of a river is provided with no water protector, and described safety guard of cutting off the water supply is used for being activated individually arbitrary main backflow water pump and/or auxiliary Help backflow water pump.
2. boiler dusting circulating treating system according to claim 1 it is characterised in that: described safety guard of cutting off the water supply Including three double two logical torsion sub- change-over switch sa, start button sb1, stop button sb2, auxiliary reclay ka, zero line wiring Terminal com, the inlet wire of described no water protector and outlet are connected on the sub- change-over switch sa of described torsion respectively, and plc takes 12 volts of electricity Source is followed by the startup power supply as auxiliary reflux water pump in start button sb1 through the sub- change-over switch sa of described torsion.
3. boiler dusting circulating treating system according to claim 2 it is characterised in that: described safety guard of cutting off the water supply Including electrode points pressure gauge p, auxiliary reclay ka, magnetic valve, audible-visual annunciator, time-delay relay kt, described time-delay relay It is connected to 220v power supply through described electrode points pressure gauge p after kt, auxiliary reclay ka, magnetic valve, audible-visual annunciator are in parallel Two ends.
4. boiler dusting circulating treating system according to claim 3 it is characterised in that: described audible-visual annunciator is arranged on Operating room, described magnetic valve is arranged on standby water pipe, and described electrode points pressure gauge p is arranged on backflow water pump junction house steward On.
5. boiler dusting circulating treating system according to claim 1 it is characterised in that: described main deduster includes No. one Deduster, No. two dedusters.
6. boiler dusting circulating treating system according to claim 1 it is characterised in that: described sedimentation basin include one-level sink Shallow lake pond and second-level settling pond, the delivery port of described first stage precipitation tank is communicated to the water inlet of second-level settling pond, described two-stage precipitation The delivery port in pond is communicated to described pump house collecting-tank.
7. boiler dusting circulating treating system according to claim 1 it is characterised in that: described each deduster pass through standby Water pipe is communicated to alternate source.
8. boiler dusting circulating treating system according to claim 1 it is characterised in that: have lime defeated in described reaction tank Send machine and mixer.
CN201310680910.4A 2013-12-13 2013-12-13 Boiler dust removal circular processing system Active CN104713112B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201310680910.4A CN104713112B (en) 2013-12-13 2013-12-13 Boiler dust removal circular processing system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201310680910.4A CN104713112B (en) 2013-12-13 2013-12-13 Boiler dust removal circular processing system

Publications (2)

Publication Number Publication Date
CN104713112A CN104713112A (en) 2015-06-17
CN104713112B true CN104713112B (en) 2017-01-18

Family

ID=53412671

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201310680910.4A Active CN104713112B (en) 2013-12-13 2013-12-13 Boiler dust removal circular processing system

Country Status (1)

Country Link
CN (1) CN104713112B (en)

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2363775Y (en) * 1998-08-14 2000-02-16 徐东升 Combined multi-tube water film desulfurizing dust remover
CN2605917Y (en) * 2003-03-19 2004-03-10 龙际银 Dustproof environmental protection system
CN101017019A (en) * 2006-02-11 2007-08-15 德州亚太集团有限公司 Water-break protection device of air-conditioning unit using water as heat transfer medium
CN201404847Y (en) * 2009-05-25 2010-02-17 株洲硬质合金集团有限公司 Water-interruption protector of wet grinding machine
CN202648456U (en) * 2012-06-21 2013-01-02 安徽红星阀门有限公司 Automatic water cutoff protection system of electric induction furnace
CN103432888A (en) * 2013-09-05 2013-12-11 申安云 Flue gas denitration, desulfuration and dedusting integrated equipment of industrial boiler
CN203577530U (en) * 2013-10-18 2014-05-07 合肥市田源精铸有限公司 Water inlet mechanism of boiler dust removal system
KR101446584B1 (en) * 2011-01-17 2014-10-02 (주)부경에너지텍 Carbon dioxide collection and carbon dioxide response removal device

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100860493B1 (en) * 2008-06-09 2008-09-26 정재억 Dust removing and cooling apparatus

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2363775Y (en) * 1998-08-14 2000-02-16 徐东升 Combined multi-tube water film desulfurizing dust remover
CN2605917Y (en) * 2003-03-19 2004-03-10 龙际银 Dustproof environmental protection system
CN101017019A (en) * 2006-02-11 2007-08-15 德州亚太集团有限公司 Water-break protection device of air-conditioning unit using water as heat transfer medium
CN201404847Y (en) * 2009-05-25 2010-02-17 株洲硬质合金集团有限公司 Water-interruption protector of wet grinding machine
KR101446584B1 (en) * 2011-01-17 2014-10-02 (주)부경에너지텍 Carbon dioxide collection and carbon dioxide response removal device
CN202648456U (en) * 2012-06-21 2013-01-02 安徽红星阀门有限公司 Automatic water cutoff protection system of electric induction furnace
CN103432888A (en) * 2013-09-05 2013-12-11 申安云 Flue gas denitration, desulfuration and dedusting integrated equipment of industrial boiler
CN203577530U (en) * 2013-10-18 2014-05-07 合肥市田源精铸有限公司 Water inlet mechanism of boiler dust removal system

Also Published As

Publication number Publication date
CN104713112A (en) 2015-06-17

Similar Documents

Publication Publication Date Title
CN104114242B (en) Venturi sprinkler for controlling smoke and apparatus for removing smoke and poisonous gas
CN204799046U (en) What superfine atomizing pressed down dirt host computer presses down dirt system
CN104147874B (en) Control method and control system for sack cleaner
CN105617798A (en) Air-conveying type ultrasonic wave micron-grade dry fog dust suppression system and method
CN104667673A (en) Foam-mist dust removal device
JP2015221407A (en) Dust collector
CN103691290A (en) Cement kiln SNCR (Selective Non Catalytic Reduction) flue gas denitrification system capable of improving denitrification safety
CN102913969A (en) Kitchen purging system and fire extinguishing method thereof
CN104713112B (en) Boiler dust removal circular processing system
CN106422609B (en) A kind of fully automatic multipurpose energy-saving environmental protection device with self-cleaning function
CN204147706U (en) Dying setting machine waste gas two-stage spray high-voltage electrostatic treating device
CN103159045A (en) High-pressure water mist belt corridor and transfer station dust fall device
CN204246546U (en) Full automatic ecological odor removal
CN207203270U (en) A kind of automatic emergency of intelligentized control method supplies nitrogen device
CN209173624U (en) A kind of metal and nonmetal mine concentration topical spray dust-extraction unit
CN102824807B (en) Combined de-dusting system
CN114797397B (en) Method for treating hydrogen sulfide gas in underground closed space
CN203663694U (en) Cement kiln SNCR flue gas denitration system for improving denitration security
CN204710022U (en) The treating apparatus of desulfurization, dedusting, cooling and dehydration is carried out time prepared by a kind of nano-calcium carbonate
CN204093237U (en) Foam Water-fog dusting apparatus
CN202744581U (en) Gas recovery control system of converter
CN207999302U (en) Spray smoke consuming apparatus
CN201895007U (en) Experimental ventilation hood with sewage treatment function
CN205412541U (en) Air -assisted ultrasonic wave micron order dry fog presses down dirt system
CN109276963A (en) A kind of metal and nonmetal mine concentration topical spray dust-extraction unit

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
C14 Grant of patent or utility model
GR01 Patent grant