CN108771949A - A kind of exhaust gas purification device that intermittence is supplied gas - Google Patents
A kind of exhaust gas purification device that intermittence is supplied gas Download PDFInfo
- Publication number
- CN108771949A CN108771949A CN201810585169.6A CN201810585169A CN108771949A CN 108771949 A CN108771949 A CN 108771949A CN 201810585169 A CN201810585169 A CN 201810585169A CN 108771949 A CN108771949 A CN 108771949A
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- Prior art keywords
- seal box
- exhaust gas
- shell
- vertical clapboard
- purification device
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
- B01D53/18—Absorbing units; Liquid distributors therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/0027—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with additional separating or treating functions
- B01D46/0036—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with additional separating or treating functions by adsorption or absorption
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/10—Particle separators, e.g. dust precipitators, using filter plates, sheets or pads having plane surfaces
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D47/00—Separating dispersed particles from gases, air or vapours by liquid as separating agent
- B01D47/06—Spray cleaning
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D50/00—Combinations of methods or devices for separating particles from gases or vapours
- B01D50/60—Combinations of devices covered by groups B01D46/00 and B01D47/00
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
- B01D53/04—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography with stationary adsorbents
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/02—Other waste gases
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Treating Waste Gases (AREA)
Abstract
The invention discloses a kind of exhaust gas purification devices that intermittence is supplied gas, including shell, the first vertical clapboard, the second vertical clapboard, motor and exhaust fan；Conversion intracavitary is provided with a lifting seal box, row's activity mouth is offered in the top and bottom of lifting seal box, several fixing ports corresponding with movable mouth are offered in the top and bottom of first vertical clapboard, two parts are both provided with heat exchanger tube, coarse strainer, active carbon filler layer, fie screen up and down in purify cavity, top in the spray chamber is equipped with a horizontal spray tube, and a downward opening air leaving cover is fixedly arranged in the middle of in the spray chamber.The present invention completes the switching of the different location of internal gas by the lifting seal box moving up and down of setting, intermittent enter in two chambers of exhaust gas is set to be purified, ensure the time that gas is stood in inside, so that exhaust gas is extended in absorbed inside, clarification time, improve treatment effect.
Description
Technical field
The present invention relates to a kind of environmental protection equipment, exhaust gas purification device that specifically a kind of intermittence is supplied gas.
Background technology
Exhaust-gas treatment is also known as waste gas purification, and exhaust-gas treatment refers to that the exhaust gas generated for industrial site, factory floor exists
It is externally pre-processed before discharge, to reach the work for the standard that national exhaust gas externally discharges.General exhaust-gas treatment includes to have
Machine exhaust-gas treatment, dust exhaust-gas treatment, soda acid exhaust-gas treatment, peculiar smell exhaust-gas treatment and air sterilizing purification etc..But
It is that existing waste gas treatment equipment processing exhaust gas is not enough, gas conveying is often lasting progress, causes exhaust gas with filtering, only
Change the component contact period, clean-up effect is poor, and if using structures such as pulse valves, the variation of flue gas internal pressure will be caused greatly,
It is unfavorable for using safely, therefore, it is necessary to design a kind of purifier to solve the above problems.
Invention content
The purpose of the present invention is to provide a kind of exhaust gas purification devices that intermittence is supplied gas, to solve above-mentioned background skill
The problem of being proposed in art.
To achieve the above object, the present invention provides the following technical solutions：
A kind of exhaust gas purification device that intermittence is supplied gas, including shell, the first vertical clapboard, the second vertical clapboard, motor and pumping
Wind turbine；First vertical clapboard and the second vertical clapboard are each attached in shell, are set gradually being divided into shell from left to right
Conversion chamber, purify cavity and spray chamber, the conversion intracavitary is provided with a lifting seal box, lifts width and the conversion of seal box
Chamber it is of same size, lift and be fixed with vertical mounting plate in the corresponding inner walls in left side of seal box, it is embedded on mounting plate
Several equally distributed guide wheels are installed, guide wheel is rotatablely connected on a mounting board, and mounting plate is stretched out in a side of guide wheel；It is rising
The top and bottom of drop seal box offer row's activity mouth, are connected in movable mouth and lifting seal box, perpendicular described first
The top and bottom of partition board offer several fixing ports corresponding with movable mouth, and the distance between upper and lower fixing port is big
In upper and lower the distance between movable mouth；The upper side and lower side of the lifting seal box has been fixedly connected with several and has resetted bullet
Spring, resetting spring are connected with corresponding inner walls；The motor is fixed on hull outside, and the output shaft of motor horizontally extends into
Intracavitary is converted, is fixed with the cam rotated in the vertical direction on the output shaft of motor, being equipped on the free end of cam can turn
Dynamic rotating dog, cable wire is fixedly connected on rotating dog, and the other end of cable wire ties up on lifting seal box；The lifting seal box
It is inside communicated with the air induction hose of plastic material, a horizontal diaphragm plate is fixedly arranged in the middle of in the purify cavity, by purify cavity
Interior even partition is connected to upper and lower two fixing ports respectively at upper and lower two parts, upper and lower two parts, upper and lower two parts corresponding
Several exhaust outlets are offered on two vertical clapboards；Two parts are both provided with heat exchanger tube, coarse strainer, activated carbon up and down in purify cavity
Packing layer, fie screen, and set gradually from left to right；Top in the spray chamber is equipped with a horizontal spray tube, spray
Several downward nozzles are offered on the downside of shower pipe, drainpipe is communicated in the bottom of spray chamber, and the liquid of absorption is discharged；
It is fixedly arranged in the middle of a downward opening air leaving cover in the spray chamber, is communicated with outside shell by air hose on air leaving cover
The exhaust fan of side.
Further：The volume of the purify cavity is more than spray chamber.
Further：The right side height of the lifting seal box is more than left side height.
Further：The gasket of rubber material is stained on the right side of the lifting seal box, lifting seal box passes through
Gasket is contacted with the side wall of the first vertical clapboard.
Further：The resetting spring is located under natural conditions, and the movable mouth of upper end is connected to the fixing port of upper end.
Further：The other end of the air induction hose, which stretches out on shell and end to be communicated with, is fixed on housing exterior walls
On inlet flange.
Further：The coarse strainer, active carbon filler layer offer clean-up port on the corresponding shell of fie screen, clear up
Cleaning door is equipped with by hinge and lock on mouthful.
Further：The air leaving cover is located at below the exhaust outlet of lower end.
Compared with prior art, the beneficial effects of the invention are as follows：The present invention is close by the lifting moving up and down of setting
Joint sealing completes the switching of the different location of internal gas, and intermittent enter in two chambers of exhaust gas is made to be purified, and ensures
The time that gas is stood in inside makes exhaust gas extend in absorbed inside, clarification time, improves treatment effect, while exhaust gas is always
In flow regime, the variation of internal pressure is avoided, device is made to use more safety and stability；It is absorbed in exhaust gas by heat exchanger tube
Heat, suction is filtered to the impurity in exhaust gas by coarse strainer, active carbon filler layer, fie screen, spray tube ejecting liquid
It receives, realizes the processing of exhaust gas, device is easy to use, easy to operate, is conveniently replaceable cleaning, so that device is safeguarded more convenient.
Description of the drawings
Fig. 1 is a kind of structural schematic diagram for the exhaust gas purification device that intermittence is supplied gas.
Fig. 2 is a kind of distributed architecture schematic diagram of movable mouth in exhaust gas purification device that intermittence is supplied gas.
Fig. 3 is mounting plates structure schematic diagram in a kind of exhaust gas purification device that intermittence is supplied gas.
In figure：1- shells, 2- convert chamber, 3- purify cavities, 4- spray chambers, the first vertical clapboards of 5-, the second vertical clapboards of 6-, 7- liters
Drop seal box, 8- mounting plates, 9- guide wheels, 10- motors, 11- cams, 12- rotating dogs, 13- cable wires, 14- resetting springs, 15- into
Gas hose, 16- inlet flanges, 17- activity mouths, 18- fixing ports, 19- diaphragm plates, 20- heat exchanger tubes, 21- coarse strainers, 22- activity
Carbon filling material layer, 23- fie screens, 24- exhaust outlets, 25- spray tubes, 26- air leaving covers, 27- exhaust fans, 28- drainpipes, 29- sealings
Pad, 30- cleaning doors.
Specific implementation mode
Please refer to figure, in the embodiment of the present invention, a kind of exhaust gas purification device that intermittence is supplied gas, including shell 1,
One vertical clapboard 5, the second vertical clapboard 6, motor 10 and exhaust fan 27；First vertical clapboard, 5 and second vertical clapboard 6 is each attached to shell
In body 1, the conversion chamber 2 set gradually from left to right, purify cavity 3 and spray chamber 4, the volume of purify cavity 3 will be divided into shell 1
More than spray chamber 4.
It is provided with a lifting seal box 7 in the conversion chamber 2, lifts the width phase of the width and conversion chamber 2 of seal box 7
Together, it lifts and is fixed with vertical mounting plate 8 on corresponding 1 inner wall of shell in left side of seal box 7, it is embedded on mounting plate 8 to be equipped with
Several equally distributed guide wheels 9, guide wheel 9 are rotatably connected on mounting plate 8, and mounting plate 8 is stretched out in a side of guide wheel 9, is convenient for
It is contacted with lifting seal box 7；The right side height for lifting seal box 7 is more than left side height, is adhered on the right side of lifting seal box 7
There are the gasket 29 of rubber material, lifting seal box 7 to be contacted with the side wall of the first vertical clapboard 5 by gasket 29, keep sealing,
Row's activity mouth 17 is offered in the top and bottom of lifting seal box 7, is connected in movable mouth 17 and lifting seal box 7,
The top and bottom of first vertical clapboard 5 offer several fixing ports 18 corresponding with movable mouth 17, and upper and lower consolidate
Determine the distance between mouth 18 and be more than upper and lower the distance between movable mouth 17, by move up and down lifting seal box 7 make it is upper and lower
Exhaust gas in lifting seal box 7, is passed into the right side of the first vertical clapboard 5 by the intermittent connection of movable mouth 17, fixing port 18；It is described
The upper side and lower side of lifting seal box 7 has been fixedly connected with several resetting springs 14, resetting spring 14 in corresponding shell 1
Wall connects, and supports lifting seal box 7 by resetting spring 14, is resetted after being moved convenient for lifting seal box 7, in lifting seal box 7
When being not affected by downward pulling force, i.e., resetting spring 14 is located under natural conditions, the movable mouth 17 of upper end and the fixing port 18 of upper end
Connection；The motor 10 is fixed on 1 outside of shell, and the output shaft of motor 10 horizontally extends into conversion chamber 2, the output of motor 10
It is fixed with the cam 11 rotated in the vertical direction on axis, rotatable rotating dog 12 is installed on the free end of cam 11, revolves
It ships and resell on another market and is fixedly connected with cable wire 13 on 12, the other end of cable wire 13 ties up on lifting seal box 7, passes through the rotation of rotating dog 12 and pulls
It is downward to lift seal box 7, so that lifting seal box 7 is moved down, the movable mouth 17 of lower end is made to be connected to fixing port 18；The lifting
The air induction hose 15 of plastic material is communicated in seal box 7, the length in conversion chamber 2 of air induction hose 15 is longer, convenient for converting
Lifting seal box 7 is followed to move in chamber 2, the other end of air induction hose 15, which stretches out on shell 1 and end to be communicated with, to be fixed on
Inlet flange 16 on 1 outer wall of shell, is connected to external exhaust gas conveyance conduit, and exhaust gas is sent in lifting seal box 7.
It is fixedly arranged in the middle of a horizontal diaphragm plate 19 in the purify cavity 3, by even partition in purify cavity 3 at upper and lower
Two parts, upper and lower two parts are connected to upper and lower two fixing ports 18 respectively, are opened on corresponding second vertical clapboard of upper and lower two parts 6
Equipped with several exhaust outlets 24, by treated in purify cavity 3, gas is sent out；Two parts, which are both provided with, above and below in purify cavity 3 changes
Heat pipe 20, coarse strainer 21, active carbon filler layer 22, fie screen 23, and set gradually from left to right, it is passed through in heat exchanger tube 20 cold
But water takes away the heat absorption in exhaust gas；The mesh diameter of coarse strainer 21 be more than fie screen 23 mesh diameter, make exhaust gas into
Row multistage filtering screen, remove exhaust gas in but partial dust particles；The coarse strainer 21, active carbon filler layer 22, fie screen
It offers clean-up port on 23 corresponding shells 1, cleaning door 30 is equipped with by hinge and lock on clean-up port, it is clear by opening
Coarse strainer 21, active carbon filler layer 22, the fie screen 23 of 30 pairs of inside of reason door carry out cleaning replacement.
Top in the spray chamber 4 is equipped with a horizontal spray tube 25, and the downside of spray tube 25 offers several
The outer end of downward nozzle, spray tube 25 is communicated with feed liquid case by water pump, and filling is harmful in exhaust gas for absorbing in feed liquid case
The liquid of gas, such as acid & alkali liquid etc. are communicated with drainpipe 28 in the bottom of spray chamber 4, and the liquid of absorption is discharged；Described
It is fixedly arranged in the middle of a downward opening air leaving cover 26 in spray chamber 4, air leaving cover 26 is located at 24 lower section of exhaust outlet of lower end, outlet
The exhaust fan 27 positioned at 1 outside of shell is communicated with by air hose on cover 26, internal gas is extracted out.
In use, exhaust gas is sent to from air induction hose 15 in lifting seal box 7, motor 10 is rotated with moving cam 11, downwards
Intermittence pulls lifting seal box 7, and lifting seal box 7 is made to move down, to make between the movable mouth 17 and fixing port 18 of lower section
Having a rest property is connected to, two up and down for lifting the exhaust gas in seal box 7 and being sent to from upper and lower fixing port 18 in purify cavity 3, instantly
When the movable mouth 17 of side is connected to fixing port 18, the exhaust gas that the upper part in purify cavity 3 enters does not flow in internal almost stand,
By purify cavity 3 to the heat absorption in flue gas, and ensure gas and coarse strainer 21 therein, active carbon filler layer 22, thin
Strainer 23 contacts fully, after lifting seal box 7 makes its pulling force, top is reset under the action of resetting spring 14, makes upper end
Movable mouth 17 be connected to fixing port 18, gas in 3 lower part of purify cavity keeps standing at this time, and upper and lower two parts are alternately real
It is existing, make gas in internal intermittent mobile, the contact effect of raising heat exchange and filtering；Filtered gas is sent into purify cavity 3
Into spray chamber 4, the feed liquid that can absorb harmful components in gas is sprayed in spray chamber 4, reduces the harmful components in gas, most
Gas is discharged by air leaving cover 26 afterwards.The present invention completes internal gas not by the lifting seal box moving up and down of setting
With the switching of position, intermittent enter in two chambers of exhaust gas is made to be purified, ensures the time that gas is stood in inside,
So that exhaust gas is extended in absorbed inside, clarification time, improve treatment effect, while exhaust gas is in flow regime always, avoids interior
The variation of portion's pressure makes device use more safety and stability；The heat in exhaust gas is absorbed by heat exchanger tube, passes through coarse strainer, work
Property carbon filling material layer, fie screen, spray tube ejecting liquid absorption is filtered to the impurity in exhaust gas, realize the processing of exhaust gas, fill
Set it is easy to use, it is easy to operate, be conveniently replaceable cleaning, make device safeguard it is more convenient.
In addition, it should be understood that although this specification is described in terms of embodiments, but not each embodiment is only wrapped
Containing an independent technical solution, this description of the specification is merely for the sake of clarity, and those skilled in the art should
It considers the specification as a whole, the technical solutions in the various embodiments may also be suitably combined, forms those skilled in the art
The other embodiment being appreciated that.
Claims (8)
1. a kind of exhaust gas purification device that intermittence is supplied gas, including shell（1）, the first vertical clapboard（5）, the second vertical clapboard
（6）, motor（10）And exhaust fan（27）；It is characterized in that, first vertical clapboard（5）With the second vertical clapboard（6）It is each attached to
Shell（1）It is interior, by shell（1）Inside it is divided into the conversion chamber set gradually from left to right（2）, purify cavity（3）And spray chamber（4）,
The conversion chamber（2）Inside it is provided with a lifting seal box（7）, lift seal box（7）Width with conversion chamber（2）Width phase
Together, seal box is lifted（7）The corresponding shell in left side（1）Vertical mounting plate is fixed on inner wall（8）, mounting plate（8）It is upper embedding
Enter to be equipped with several equally distributed guide wheels（9）, guide wheel（9）It is rotatably connected on mounting plate（8）On, guide wheel（9）A side
Stretch out mounting plate（8）；In lifting seal box（7）Top and bottom offer row's activity mouth（17）, movable mouth（17）With
Lift seal box（7）Interior connection, in first vertical clapboard（5）Top and bottom offer and movable mouth（17）It is corresponding
Several fixing ports（18）, and upper and lower fixing port（18）The distance between be more than upper and lower movable mouth（17）The distance between；
The lifting seal box（7）The upper side and lower side be fixedly connected with several resetting springs（14）, resetting spring（14）With it is right
The shell answered（1）Inner wall connects；The motor（10）It is fixed on shell（1）Outside, motor（10）Output shaft horizontally extend into
Convert chamber（2）It is interior, motor（10）Output shaft on be fixed with the cam rotated in the vertical direction（11）, cam（11）Freedom
Rotatable rotating dog is installed on end（12）, rotating dog（12）On be fixedly connected with cable wire（13）, cable wire（13）Other end
Tie up to lifting seal box（7）On；The lifting seal box（7）Inside it is communicated with the air induction hose of plastic material（15）, described net
Change chamber（3）Interior is fixedly arranged in the middle of a horizontal diaphragm plate（19）, by purify cavity（3）Interior even partition at upper and lower two parts, on
Lower two parts respectively with upper and lower two fixing ports（18）Connection, corresponding second vertical clapboard of upper and lower two parts（6）On offer
Several exhaust outlets（24）；Purify cavity（3）Interior two parts up and down are both provided with heat exchanger tube（20）, coarse strainer（21）, activated carbon fills out
The bed of material（22）, fie screen（23）, and set gradually from left to right；The spray chamber（4）Interior top is equipped with a level
Spray tube（25）, spray tube（25）Downside offer several downward nozzles, in spray chamber（4）Bottom be communicated with draining
Pipe（28）, the liquid of absorption is discharged；In the spray chamber（4）Interior is fixedly arranged in the middle of a downward opening air leaving cover（26）,
Air leaving cover（26）It is upper to be communicated with positioned at shell by air hose（1）The exhaust fan in outside（27）.
2. the exhaust gas purification device that a kind of intermittence according to claim 1 is supplied gas, it is characterised in that：The purification
Chamber（3）Volume be more than spray chamber（4）.
3. the exhaust gas purification device that a kind of intermittence according to claim 1 is supplied gas, it is characterised in that：The lifting
Seal box（7）Right side height be more than left side height.
4. the exhaust gas purification device that a kind of intermittence according to claim 1 or 3 is supplied gas, it is characterised in that：It is described
Lift seal box（7）Right side on be stained with the gasket of rubber material（29）, lift seal box（7）Pass through gasket（29）With
First vertical clapboard（5）Side wall contact.
5. the exhaust gas purification device that a kind of intermittence according to claim 1 is supplied gas, it is characterised in that：The reset
Spring（14）Positioned under natural conditions, the movable mouth of upper end（17）With the fixing port of upper end（18）Connection.
6. the exhaust gas purification device that a kind of intermittence according to claim 1 is supplied gas, it is characterised in that：The air inlet
Hose（15）Other end stretch out shell（1）And it is communicated on end and is fixed on shell（1）Inlet flange on outer wall
（16）.
7. the exhaust gas purification device that a kind of intermittence according to claim 1 is supplied gas, it is characterised in that：The coarse filtration
Net（21）, active carbon filler layer（22）, fie screen（23）Corresponding shell（1）On offer clean-up port, pass through conjunction on clean-up port
Page and lock are equipped with cleaning door（30）.
8. the exhaust gas purification device that a kind of intermittence according to claim 1 is supplied gas, it is characterised in that：The outlet
Cover（26）Exhaust outlet positioned at lower end（24）Lower section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810585169.6A CN108771949B (en) | 2018-06-08 | 2018-06-08 | Waste gas treatment purifier of intermittent type nature gas transmission |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810585169.6A CN108771949B (en) | 2018-06-08 | 2018-06-08 | Waste gas treatment purifier of intermittent type nature gas transmission |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108771949A true CN108771949A (en) | 2018-11-09 |
| CN108771949B CN108771949B (en) | 2021-05-07 |
Family
ID=64024848
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810585169.6A Active CN108771949B (en) | 2018-06-08 | 2018-06-08 | Waste gas treatment purifier of intermittent type nature gas transmission |
Country Status (1)
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| CN109569226A (en) * | 2019-01-25 | 2019-04-05 | 彭圆 | A kind of coking exhaust-gas efficient processing unit |
| CN109569191A (en) * | 2019-01-25 | 2019-04-05 | 彭圆 | A kind of multistage coking emission-control equipment |
| CN110038430A (en) * | 2019-05-13 | 2019-07-23 | 宁波连通设备集团有限公司 | A kind of denitrating technique and denitration system |
| CN110075685A (en) * | 2019-05-08 | 2019-08-02 | 义乌初晨新能源科技有限公司 | A kind of small automatic flue gas denitrification equipment |
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