CN103706474A - Electric-bag combination type flow-dividing three-state dust collector - Google Patents
Electric-bag combination type flow-dividing three-state dust collector Download PDFInfo
- Publication number
- CN103706474A CN103706474A CN201310714006.0A CN201310714006A CN103706474A CN 103706474 A CN103706474 A CN 103706474A CN 201310714006 A CN201310714006 A CN 201310714006A CN 103706474 A CN103706474 A CN 103706474A
- Authority
- CN
- China
- Prior art keywords
- dust collector
- bag
- bag dust
- electric cleaner
- electric
- 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.)
- Granted
Links
Images
Landscapes
- Filtering Of Dispersed Particles In Gases (AREA)
- Electrostatic Separation (AREA)
Abstract
The invention relates to an electric-bag combination type flow-dividing three-state dust collector. The electric-bag combination type flow-dividing three-state dust collector comprises an electric dust collector, a bag dust collector, an air inlet pipe and an air outlet pipe, wherein the air inlet pipe is connected with the electric dust collector; the electric dust collector is communicated with the bag dust collector and comprises an electric dust collector box; the electric dust collector box is provided with an electric dust collector air outlet; an electric dust collector air outlet valve is arranged at the electric dust collector air outlet; the bag dust collector comprises a bag dust collector box and a bag dust collector air purification chamber which is positioned above the bag dust collector box and is provided with an air outlet of the bag dust collector air outlet; a bag dust collector air outlet valve is arranged at the air outlet of the bag dust collector; the air outlet of the electric dust collector and the bag dust collector air outlet are communicated with the air outlet pipe simultaneously. The electric-bag combination type flow-dividing three-state dust collector has the combined advantages of the electric dust collector and the bag dust collector; partition running, mutual switching and simultaneous working can be realized; the characteristics of the electric dust collector and the bag dust collector are fully played; each piece of equipment is protected, and meanwhile, requirements on environment protection are met.
Description
Technical field
the present invention relates to dedusting technology field, particularly relate to a kind of electricity bag combined shunting three condition deduster.
Background technology
the dust removal mechanism of electric cleaner is charged in high voltage electric field based on dust, and then is trapped on dust collecting pole plate and reaches the object of grey gas separation.Fine dust is because particle diameter is little, lightweight, and carrying capacity own is low, and the reasons such as " reentrainment of dusts " producing due to vibration dust-cleaning, is difficult to be collected by electric cleaner.The dust removal mechanism that can be described as electric cleaner itself has limited the further raising of its efficiency of dust collection, and conventional electric cleaner will reach 20mg/Nm
3
this new discharge standard is very difficult or uneconomical.
sack cleaner is to reach dedusting object by filtrate and the mechanical filter effect that is attached to the dust layer on filtrate.The fine dust that electric cleaner is difficult to trapping adopts sack cleaner to be easy to be collected.Maximum feature in sack cleaner performance is the efficiency of dust collection of its superelevation, and some factors larger on ESP Efficiency impact (as the fluctuation of dust specific resistance, smoke components, entrance dust concentration, exhaust gas volumn etc.) efficiency of dust collection of sack cleaner is not almost had to much impacts.In the face of more strict dust emission standard, bag type dust removing technology can meet the needs of the reliable and stable operation of fire coal boiler fume dedusting completely.
filter bag is the critical elements in sack cleaner, is being applicable within the scope of the flue-gas temperature of filter bag material capability, and when filter bag is normally worked, sack cleaner has very high efficiency of dust collection.For avoiding flue-gas temperature in dust pelletizing system to raise suddenly; or when boiler occur to be economized coal gas, reheater, superheater, water-cooling wall four-tube leakage or booster; particularly the in the situation that of boiler frequent shutdown; the oil smoke producing during ignition trigger again after shutdown can produce harmful effect to the use of filter bag; a kind of instructions for use that can meet sack cleaner; possessing again the problem that deduster that electric cleaner can adapt to the flue dust of high temperature, high humidity, oily exists in order to solve above-mentioned known deduster structure, is all very urgent technically and economically.
Summary of the invention
the object of this invention is to provide a kind of electricity bag combined shunting three condition deduster.
for achieving the above object, the technical solution used in the present invention is:
because technique scheme is used, the present invention compared with prior art has following feature:
the oil smoke that electric precipitation subregion produces while being mainly used in trapping ignition of the boiler, when coal gas occurs to economize boiler, reheater, superheater, when water-cooling wall four-tube leakage or booster, also can be switched to electric precipitation subregion, avoided high temperature, the oil smoke of high humidity and situation that bag dust collector can not be put into operation, conventional bag dust collector flue gas when above-mentioned situation is discharged from by-pass line, if boiler frequent shutdown frequent starting igniting again, a large amount of flue gases pollute atmosphere from by-pass line discharge meeting, when devoting oneself to work, electric precipitation subregion can collect flue dust, reduce atmosphere pollution,
after ignition of the boiler normal operation input, when the temperature of flue gas, humidity are normal, a bag dedusting subregion puts into operation, utilize effective filter to carry out intensive filtration, to meet fume emission requirement up to standard, there is dust removing effects stable, concentration of emission is low, the feature of excellent performance;
electric precipitation subregion and bag dedusting subregion put into operation simultaneously, the flue gas that has significantly reduced dust concentration after the trapping of electric precipitation subregion enters in bag dedusting subregion by air flow guiding plate, effectively avoided big dust particle under inertia force effect to the washing away of filter bag, be conducive to the raising of life of bag filter.Due to dust under electric field force effect with like charges, the dust that filter bag outer surface adheres to is relatively shallow loose, the gas permeability of filtration is very good, makes deashing more easy simultaneously, thereby can effectively reduce equipment running resistance, improves efficiency of dust collection.
Accompanying drawing explanation
the front view that accompanying drawing 1 is the present embodiment;
the top view that accompanying drawing 2 is the present embodiment;
accompanying drawing 3 is A-A cutaway view in accompanying drawing 1;
accompanying drawing 4 is B-B cutaway view in accompanying drawing 1.
wherein: 1, blast pipe; 2, electric cleaner casing; 3, electric cleaner outlet valve; 4, electric cleaner discharge pipe; 5, bag dust collector casing; 6, bag dust collector air-purifying chamber; 7, bag dust collector outlet valve; 8, discharge pipe; 9, inner sealed board; 10, air intake air flow guiding plate; 11, jetting deashing assembly; 12, filter assemblies; 13, electric precipitation polar curve, pole plate.
The specific embodiment
below in conjunction with drawings and Examples, the invention will be further described:
a kind of electricity bag combined shunting three condition deduster as shown in Figure 1, 2, comprise electric cleaner, bag dust collector, blast pipe 1 and discharge pipe 4, blast pipe 1 is connected with electric cleaner, electric cleaner is connected with bag dust collector, is provided with air intake air flow guiding plate 10 between electric cleaner, bag dust collector.Specifically:
as shown in Figure 3: electric cleaner comprises a whole set of dust pelletizing system: specifically comprise an electric cleaner casing 2, electric cleaner casing 2 interior supporting have electric precipitation polar curve, pole plate 13; Electric cleaner casing 2 has electric cleaner air outlet, and electric cleaner air outlet is provided with electric cleaner outlet valve 3, and electric cleaner air outlet is connected by electric cleaner discharge pipe 4 with discharge pipe 8.In the present embodiment: electric cleaner discharge pipe 4 is provided with two, and be arranged on the both sides on bag dust collector casing 5 tops or be arranged on the middle part of bag dust collector air-purifying chamber 6.In addition, electric cleaner outlet valve 3 is that dual-pressure formula is without external leakage valve.
as shown in Figure 4: bag dust collector comprises bag dust collector casing 5, is located at the bag dust collector air-purifying chamber 6 of bag dust collector casing top, bag dust collector air-purifying chamber 6 has bag dust collector air outlet, the air outlet of bag dust collector is provided with bag dust collector outlet valve 7, and bag dust collector air outlet is connected with discharge pipe 8.Bag dust collector also comprises the filter assemblies 12(filter bag being arranged in bag dust collector casing 5), be arranged on the jetting deashing assembly 11 in bag dust collector air-purifying chamber 6, jetting deashing assembly 11 is arranged on both sides or the top of bag dust collector air-purifying chamber 6.In the present embodiment: bag dust collector outlet valve 7, for pressure type leakage less leaks valve, is provided with hand-lift type sealing tegillum on bag dust collector air-purifying chamber 6, be convenient to overhaul the bag work of changing.In addition, discharge pipe 8 fits with bag dust collector casing 5, by inner sealed board 9, is separated by.
specifically set forth below the course of work of lower the present embodiment:
the flue gas that comes from boiler enters into electricity bag combined shunting three condition blast pipe through flue:
duty one: when ignition trigger produces a large amount of oil smoke again after boiler is shut down, now bag dust collector casing 5 does not move, close the bag dust collector outlet valve 7 on bag dust collector casing 5 tops, open the electric cleaner outlet valve 3 on electric cleaner casing 2 tops, electric cleaner casing 2 put into operation (high voltage source power transmission), the oil smoke producing during trapping igniting, in electric cleaner casing 2, be provided with electric precipitation polar curve, pole plate 13, dust in flue gas is by the passage with DC high voltage electric field, dust is by charged, dust with negative electrical charge tends to pole plate under the effect of electric field force, adsorbing powder dust is on pole plate and discharge electric charge, by mechanical vibrator mechanism, pole plate is carried out to vibration dust-cleaning, the dust being gathered on pole plate is just shaken and is fallen in ash bucket, and the air-flow after electric precipitation trapping flue dust enters discharge pipe 8 by electric cleaner outlet valve 3, electric cleaner discharge pipe 4.
duty two: after ignition of the boiler normal operation input, the bag dust collector outlet valve 7 on opened pocket dust collector box body 5 tops, bag dust collector casing 5 puts into operation, close electric cleaner outlet valve 3, now electric cleaner casing 2 does not move (high voltage source is power transmission not), boiler smoke carries out sedimentation at electric cleaner casing 2, then flue gas enters bag dust collector casing 5, bag dust collector casing 5 interior forward end are provided with air intake air flow guiding plate 10, have effectively avoided big dust particle washing away filter bag under inertia force effect; Flue gas stream enters bag dust collector casing 5, flue gas stream is in the interior even rising of dust-removing box 5, flue dust is through filter assemblies 12, be captured in dust on filter bag and shaken after by the winding-up effect of jetting deashing assembly 11 and fall ash bucket, the clean gas after filtration enters discharge pipe 8 by bag dust collector air-purifying chamber 6 and bag dust collector outlet valve 7.
duty three: when boiler smoke condition is normal, or as required, electric cleaner and bag dust collector put into operation simultaneously, now close electric cleaner outlet valve 3, opened pocket deduster outlet valve 7, electric cleaner casing 2 put into operation (high voltage source power transmission), boiler smoke enters electric cleaner casing 2, dust in flue gas is by the passage with DC high voltage electric field, dust is by charged, dust with negative electrical charge tends to pole plate under the effect of electric field force, and adsorbing powder dust is on pole plate and discharge electric charge; By mechanical vibrator mechanism, pole plate is carried out to vibration dust-cleaning, the dust being gathered on pole plate is just shaken and is fallen in ash bucket; Now bag dust collector casing 5 also puts into operation, and bag dust collector casing 5 interior forward end are provided with air intake air flow guiding plate 10, has effectively avoided big dust particle washing away filter bag under inertia force effect; Flue gas stream after electric precipitation trapping flue dust enters bag dust collector casing 5, flue gas stream is in the interior even rising of dust-removing box 5, flue dust is through filter assemblies 12, the dust being captured on filter bag is shaken and is fallen ash bucket by the winding-up of jetting deashing assembly 11, and the clean gas after filtration enters discharge pipe 8 by bag dust collector air-purifying chamber 6 and bag dust collector outlet valve 7.
electricity bag combined shunting three condition deduster of the present invention can be by being achieved electric cleaner transformation.Wherein: former electric cleaner is three electric field structures (can be also four electric field structures), at this, retain the first electric field, utilized the shell of original electric cleaner, retain ash bucket parts, and transform accordingly, after having removed the devices such as the polar curve of second and third electric field, pole plate, rapping apparatus, high tension silicon rectifier, on the casing of second and third electric field, install bag dust collector box part additional, filter bag, bag cage are installed, filter-bag blowing deashing device is set, set up bag dedusting partition sections.
the present embodiment deduster is divided into two subregions, and one is to be electric precipitation subregion, and another is a bag dedusting subregion.Two subregion dedusting methods have been taked shunting and series connection form, and two regions can be separated, and can merge again, and equipment can move under three kinds of states.The oil smoke that electric precipitation subregion produces while being mainly used in trapping ignition of the boiler; Boiler smoke when bag dedusting subregion is collected normal operation, utilizes effective filter to carry out intensive filtration, to meet fume emission requirement up to standard; Meanwhile, in normal operation, when temporary derangement occurs for either party in two dedusting subregions, can be switched to another subregion, there is stronger mutual compensating; When boiler smoke condition is normal, or as required, electric precipitation subregion puts into operation, and the subregion of bag dedusting simultaneously also can drop into series operation, and now equipment running resistance decreases, and efficiency of dust collection is improved.
the present invention's electricity bag combined shunting three condition deduster is applicable to Retrofit on electrostatic precipitator project, electricity bag combined shunting three condition deduster combines electric cleaner and sack cleaner advantage separately effectively, bag dust collector and electric cleaner partition running, mutually switch, give full play to the feature of electric cleaner and sack cleaner, to meet the working condition requirement of boiler frequent shutdown, frequent starting, infringement to filter bag in the time of can also effectively protecting due to boiler booster simultaneously, owing to there being the existence of electric cleaner subregion, when coal gas occurs to economize boiler, reheater, superheater, when water-cooling wall four-tube leakage or booster, air intake valve before bag dedusting subregion can be closed in time according to control signal, avoid the direct impact of steam to filter bag in air-flow, now air-flow is switched to electric cleaner subregion, electric cleaner subregion can be at high temperature, under the flue gas condition of high humidity, carry out dedusting work, and remove the flue dust in flue gas, both guaranteed the safety of filter bag, met again the requirement of environmental protection.
above-described embodiment is only explanation technical conceive of the present invention and feature, and its object is to allow person skilled in the art can understand content of the present invention and implement according to this, can not limit the scope of the invention with this.All equivalences that Spirit Essence is done according to the present invention change or modify, within all should being encompassed in protection scope of the present invention.
Claims (9)
1. an electricity bag combined shunting three condition deduster, is characterized in that: comprise electric cleaner, bag dust collector, blast pipe and discharge pipe, described blast pipe is connected with electric cleaner, and described electric cleaner is connected with bag dust collector; Described electric cleaner comprises electric cleaner casing, and described electric cleaner casing has electric cleaner air outlet, and described electric cleaner air outlet is provided with electric cleaner outlet valve; Described bag dust collector comprises bag dust collector casing, is located at the bag dust collector air-purifying chamber of described bag dust collector casing top, described bag dust collector air-purifying chamber has bag dust collector air outlet, and the air outlet of described bag dust collector is provided with bag dust collector outlet valve; Described electric cleaner air outlet, bag dust collector air outlet are connected with described discharge pipe simultaneously;
When opening described electric cleaner outlet valve, while closing described bag dust collector outlet valve: described electric cleaner operation, described bag dust collector does not move;
When closing described electric cleaner outlet valve, while opening described bag dust collector outlet valve: described electric cleaner does not move, described bag dust collector operation; Or described electric cleaner, bag dust collector move simultaneously.
2. a kind of electricity bag combined shunting three condition deduster according to claim 1, it is characterized in that: described electric cleaner air outlet is connected by electric cleaner discharge pipe with discharge pipe, described electric cleaner discharge pipe is arranged on the both sides on described bag dust collector casing top or is arranged on the middle part of described bag dust collector air-purifying chamber.
3. a kind of electricity bag combined shunting three condition deduster according to claim 1, is characterized in that: described electric cleaner outlet valve is that dual-pressure formula is without external leakage valve.
4. a kind of electricity bag combined shunting three condition deduster according to claim 1, is characterized in that: described bag dust collector also comprises the filter assemblies that is arranged in described bag dust collector casing, is arranged on the jetting deashing assembly in described bag dust collector air-purifying chamber.
5. a kind of electricity bag combined shunting three condition deduster according to claim 4, is characterized in that: described jetting deashing assembly is arranged on both sides or the top of described bag dust collector air-purifying chamber.
6. a kind of electricity bag combined shunting three condition deduster according to claim 1, is characterized in that: described discharge pipe and described bag dust collector casing fit, and by inner sealed board, are separated by.
7. a kind of electricity bag combined shunting three condition deduster according to claim 1, is characterized in that: described bag dust collector outlet valve is that pressure type leakage less leaks valve.
8. a kind of electricity bag combined shunting three condition deduster according to claim 1, is characterized in that: on described bag dust collector air-purifying chamber, be provided with hand-lift type sealing tegillum.
9. a kind of electricity bag combined shunting three condition deduster according to claim 1, is characterized in that: between described electric cleaner, bag dust collector, be provided with air intake air flow guiding plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310714006.0A CN103706474B (en) | 2013-12-23 | 2013-12-23 | A kind of electric bag combined shunting three condition deduster |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310714006.0A CN103706474B (en) | 2013-12-23 | 2013-12-23 | A kind of electric bag combined shunting three condition deduster |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103706474A true CN103706474A (en) | 2014-04-09 |
| CN103706474B CN103706474B (en) | 2016-02-10 |
Family
ID=50400032
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310714006.0A Active CN103706474B (en) | 2013-12-23 | 2013-12-23 | A kind of electric bag combined shunting three condition deduster |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103706474B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108379957A (en) * | 2018-05-09 | 2018-08-10 | 东莞市中海明环保科技有限公司 | A kind of fire-proof and explosion-proof off-line ash-clearing bag pulse dedusting device |
| CN114558388A (en) * | 2022-03-31 | 2022-05-31 | 沈阳远大环境工程有限公司 | Full-area charged filtering dust collector |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6152988A (en) * | 1997-10-22 | 2000-11-28 | The United States Of America As Represented By The Administrator Of The Environmental Protection Agency | Enhancement of electrostatic precipitation with precharged particles and electrostatic field augmented fabric filtration |
| CN2695087Y (en) * | 2003-04-15 | 2005-04-27 | 罗思玲 | Electron-bag combined dust separator |
| CN201140022Y (en) * | 2007-12-14 | 2008-10-29 | 陈茂荣 | Electric bag composite dust wiper |
| CN201161149Y (en) * | 2007-11-23 | 2008-12-10 | 东华大学 | Electric bag combined dust remover for dedusting of flue gas |
| CN102430313A (en) * | 2011-11-23 | 2012-05-02 | 科林环保装备股份有限公司 | Front-bag and rear-electricity combined flow distribution deduster |
| CN202893136U (en) * | 2012-10-30 | 2013-04-24 | 科林环保装备股份有限公司 | Electric bag combined dust remover with ultralong filter bags |
| CN103143224A (en) * | 2013-03-11 | 2013-06-12 | 江苏中材环境工程有限公司 | Electric-bag composite dust collector |
| CN203725259U (en) * | 2013-12-23 | 2014-07-23 | 科林环保装备股份有限公司 | Electric bag combined shunt three-state dust collector |
-
2013
- 2013-12-23 CN CN201310714006.0A patent/CN103706474B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6152988A (en) * | 1997-10-22 | 2000-11-28 | The United States Of America As Represented By The Administrator Of The Environmental Protection Agency | Enhancement of electrostatic precipitation with precharged particles and electrostatic field augmented fabric filtration |
| CN2695087Y (en) * | 2003-04-15 | 2005-04-27 | 罗思玲 | Electron-bag combined dust separator |
| CN201161149Y (en) * | 2007-11-23 | 2008-12-10 | 东华大学 | Electric bag combined dust remover for dedusting of flue gas |
| CN201140022Y (en) * | 2007-12-14 | 2008-10-29 | 陈茂荣 | Electric bag composite dust wiper |
| CN102430313A (en) * | 2011-11-23 | 2012-05-02 | 科林环保装备股份有限公司 | Front-bag and rear-electricity combined flow distribution deduster |
| CN202893136U (en) * | 2012-10-30 | 2013-04-24 | 科林环保装备股份有限公司 | Electric bag combined dust remover with ultralong filter bags |
| CN103143224A (en) * | 2013-03-11 | 2013-06-12 | 江苏中材环境工程有限公司 | Electric-bag composite dust collector |
| CN203725259U (en) * | 2013-12-23 | 2014-07-23 | 科林环保装备股份有限公司 | Electric bag combined shunt three-state dust collector |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108379957A (en) * | 2018-05-09 | 2018-08-10 | 东莞市中海明环保科技有限公司 | A kind of fire-proof and explosion-proof off-line ash-clearing bag pulse dedusting device |
| CN114558388A (en) * | 2022-03-31 | 2022-05-31 | 沈阳远大环境工程有限公司 | Full-area charged filtering dust collector |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103706474B (en) | 2016-02-10 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN100560216C (en) | Static electric cloth bag compact mixed type dust remover and dust collection method thereof | |
| CN102327724B (en) | Electric-bag composite dust collector | |
| CN206853380U (en) | A kind of construction site dust arrester | |
| CN107648975B (en) | Dust removal method and device for ultralow emission of dust-containing gas | |
| CN102553382B (en) | Double-row filter bag embedded type electric bag compound dust catcher with electric field area at front stage | |
| CN202844811U (en) | Electric-bag combined dust collection device | |
| CN103566695B (en) | Enhanced coupled-mode embedded type electrostatic-bag integrated dust collector | |
| CN104841556A (en) | Low-low-temperature electric dust remover | |
| CN102658240B (en) | Radial flow electro-precipitator and power station boiler dust collector using same | |
| CN207708721U (en) | A kind of self-cleaning type dry filter | |
| CN103706474B (en) | A kind of electric bag combined shunting three condition deduster | |
| CN204996274U (en) | Circulating fluidized bed boiler is with two bag dust removers of two electricity | |
| CN203725259U (en) | Electric bag combined shunt three-state dust collector | |
| CN202336276U (en) | Front-bag back-electric combined shunting dust remover | |
| CN203540269U (en) | Composite dust remover | |
| CN102430313B (en) | Front-bag and rear-electricity combined flow distribution deduster | |
| CN202387346U (en) | Lenticular electric bag compound dust remover | |
| CN101337148A (en) | Large electric-bag complex type dust remover | |
| CN105903283A (en) | Pulse bag type dust collector | |
| CN202621290U (en) | Radial flow type electric precipitator and power station boiler dust removal device using same | |
| CN207591529U (en) | A kind of environmentally friendly island device of desulphurization denitration dedusting | |
| CN206935019U (en) | Electric bag integrated dust collector | |
| CN2507563Y (en) | Magnetic controlled electrostatic duster | |
| CN109331587A (en) | It is a kind of can intelligent blanking deduster | |
| CN205796791U (en) | Pulsed jet cloth filter |
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 | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20160809 Address after: Split eight communities in Wujiang District of Suzhou City, Jiangsu province 215000 Patentee after: Environmental Protection Technology Co., Ltd. Address before: Song Ling Zhen Wujiang District of Suzhou City, Jiangsu province 215222 split eight community traffic road No. 8 Patentee before: Kelin Environmental Protection Equipment, Inc. |