CN107349727A - A kind of smart spraying dust arrester and dust removal method - Google Patents
A kind of smart spraying dust arrester and dust removal method Download PDFInfo
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- CN107349727A CN107349727A CN201710768018.XA CN201710768018A CN107349727A CN 107349727 A CN107349727 A CN 107349727A CN 201710768018 A CN201710768018 A CN 201710768018A CN 107349727 A CN107349727 A CN 107349727A
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- 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
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/05—Programmable logic controllers, e.g. simulating logic interconnections of signals according to ladder diagrams or function charts
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Abstract
A kind of smart spraying dust arrester and dust removal method, the device include PLC（1）；With PLC（1）The display of connection（2）；With PLC（1）The sensor of dust concentration of connection（3）, air velocity transducer（4）, granularity of dust sensor（5）With high-pressure fog component；Sensor of dust concentration（3）, air velocity transducer（4）With granularity of dust sensor（5）Real-time detector data is transferred to PLC（1）；When dust concentration reaches preset value, PLC（1）Control starts dedusting operation；Work as sensor of dust concentration（3）When the dust concentration of detection is less than preset value, PLC（1）Control stops dedusting operation；When dust concentration is higher than preset value, PLC（1）By controlling hydraulic pressure of spraying, so as to adjust droplet size, optimized the matching of water smoke geometry equivalent diameter and dust geometry equivalent diameter, improve dust removing effects and efficiency of dust collection.
Description
Technical field
The present invention relates to dedusting technology field, more particularly, to a kind of smart spraying dust arrester and dust removal method.
Background technology
In some fields using dust prevention and control facilities such as dedustings, airborne dust and material damage into environment can be greatly lowered
Consumption, environmental protection, reduces the harm to human health.The dust prevention and control facility used at present mainly has dry dust removal to be removed with wet type
Dirt.Wet dust collection technology is mainly based on spraying and dedusting and medicament dedusting.Its Chinese medicine dedusting is the extension of spraying and dedusting technology,
Dust suppression medicament is added in sprinkling equipment, improves anti-dust effect.Sprayed water by producing point to dust, increase humidity makes dust
No longer kick up.It is inhibited to the dust of uncontrollable discharge, but water fog particle is big, and the ability for handling fine dusts compares
Low, water consumption is big, can not normal use under low temperature.
CN105561711A disclosed a kind of intelligent environment protection spray dust remover on 05 11st, 2016, including movement is set
Standby terminal, systems control division point, sprayer unit and the pattern recognition device for identifying different particulates, the systems control division point
Including dedusting dolly and intelligent controller, the input of the intelligent controller is connected with described image identification device, described to remove
The wheel of dirt dolly is connected with drive device and braking device, and the vehicle body of the dedusting dolly is provided with the spraying and filled
Put, the drive device is connected by drive control circuit with the output end of the intelligent controller, the braking device
It is connected by brake control circuit with the output end of the intelligent controller, the sprayer unit passes through atomizing control circuit and institute
The output end connection of intelligent controller is stated, the mobile device terminal communicates to connect with the intelligent controller.
There is following control mode in existing dedusting technology：
Using the dust concentration of sensor of dust concentration on-line checking dust point, when dust concentration is higher than preset alarm value
When, start Water-fog dusting apparatus and carry out dedusting, when dust concentration is less than preset alarm value, Water-fog dusting apparatus is automatically stopped work
Make, the device removes the real-time online detection that dust concentration can be achieved, and can also realize dust exceeding alarm and remote monitoring etc..
Using the dust concentration of sensor of dust concentration on-line checking dust point, when dust concentration is higher than preset alarm value
When, start Water-fog dusting apparatus and carry out dedusting, and electric proportional flow control valve can be adjusted by becoming level according to the size of dust concentration
Valve port flow area size, the injection flow rate size of nozzle is adaptively adjusted, when dust concentration is less than preset alarm value, water smoke
Dust arrester is automatically stopped work, except the real-time online of achievable dust concentration detects, is adaptively adjusted injection flow rate size, also
Dust exceeding alarm and remote monitoring etc. can be achieved.
Using environmental monitoring system, the micro- mist dedusting of integrated high voltage and two kinds of devices of suppressing dust with dry mist can be according to operating environment powder
The change of dust concentration, wind speed and temperature, the intelligent control of spray for dust suppression is realized, solve single spraying and apply office except dust suppression technology
Sex-limited problem, realize the synchronized dust removal of open, semi-enclosed space and confined space uncontrollable discharge dust.
Existing dedusting technology above, although the real-time online detection for realizing dust concentration contrasts with preset alarm value, open
Stop Water-fog dusting apparatus, dust exceeding alarm and remote monitoring；Adaptive water spray dedusting；According to operating environment dust concentration, wind
The change of speed and temperature, realize the intelligent control of spray for dust suppression.But dust removing effects and efficiency of dust collection still suffer from room for promotion.
The content of the invention
The defects of in order to overcome prior art, present invention solves the technical problem that being：One kind is provided by controlling water smoke
Granularity, make being optimal of matching of droplet size and granularity of dust, obtain the intelligence of more excellent dust removing effects and efficiency of dust collection
Spray dust remover and dust removal method.
In order to solve the above-mentioned technical problem, on the one hand, the present invention provides a kind of smart spraying dust arrester, including PLC controls
Device processed；The display being connected with the PLC；Sensor of dust concentration, the wind speed being connected with the PLC sense
Device and granularity of dust sensor；The high-pressure fog component being connected with the PLC；The high-pressure fog component includes water
Case, the high-pressure plunger pump being connected by pipeline with the water tank, the regulation being connected by pipeline with the high-pressure plunger pump discharge
Valve, the electric check valve being connected by pipeline with the regulating valve, the nozzle being connected by pipeline with the electric check valve；Institute
State PLC include being used for realizing receive sensor of dust concentration, air velocity transducer and granularity of dust sensor it is real-time
Line detection information, carry out logical operation and send command adapted thereto, start and stop high-pressure fog component, control to adjust the spray that valve realizes nozzle
Hydraulic coupling transformation is adjusted, and control electric check valve realizes the break-make of control piper.
As further improved technology scheme, smart spraying dust arrester provided by the invention, also have described in being arranged at
The liquid level sensor being connected in water tank with the PLC.
As further improved technology scheme, smart spraying dust arrester provided by the invention, also have described in being arranged at
Filter on tank inlet pipe.
In order to solve the above-mentioned technical problem, on the other hand, the present invention provides a kind of smart spraying dust removal method, including following
Step：Sensor of dust concentration real-time online detects dust concentration；Air velocity transducer real-time online detects air velocity；Dust grain
Spend the geometry equivalent diameter of sensor real-time online detection dust；Sensor of dust concentration, air velocity transducer and granularity of dust pass
Real-time detector data is transferred to PLC by sensor；When the dust concentration of sensor of dust concentration detection reaches preset value,
PLC control smart spraying dust arrester carries out dedusting operation；When the dust concentration of sensor of dust concentration detection is less than
During preset value, PLC control smart spraying dust arrester closes the water supply of water mist dust-removing nozzle；When dust concentration is higher than pre-
If during value, PLC is by controlling spraying hydraulic pressure during smart spraying dust arrester dedusting, so as to adjust smart spraying dedusting
Droplet size during device dedusting, optimized the matching of water smoke geometry equivalent diameter and dust geometry equivalent diameter, improved
Dust removing effects and efficiency of dust collection.
As further improved technology scheme, smart spraying dust removal method provided by the invention, water smoke geometry equivalent diameter
Comprise the following steps with the matching optimization process of dust geometry equivalent diameter：
Air velocity transducer real-time online detects air velocity v, and granularity of dust sensor real-time online detects the geometry of dust
Equivalent diameter d1, data information transfer that air velocity transducer and granularity of dust sensor detect in real time to PLC, PLC controls
Device processed calculates as follows obtains water smoke geometry equivalent diameter d0：
In formula：d1The dust geometry equivalent diameter of-granularity of dust sensor detection, unit：μm
The density of ρ-dust grain, unit：kg·m-3
The air velocity of v-air velocity transducer detection, unit：m·s-1
η-air viscosity coefficient, unit：Pa·s
K-proportionality coefficient, dimensionless
d0- water smoke geometry equivalent diameter, unit：μm；
Smart spraying dust arrester is under different operating pressure, and the water smoke geometry equivalent diameter that nozzle sprays is in 10~100 μ
M, and pressure is bigger, water smoke geometry equivalent diameter is smaller；
The rated operating pressure of smart spraying dust arrester spraying hydraulic pressure is P0, PLC control smart spraying dedusting
Spraying hydraulic pressure after device decompression is divided into P1、P2、P3And P4Fourth gear, and the minimum operating pressure of smart spraying dust arrester spraying
For P4, their relation meets P0>P1>P2>P3>P4；
Include following five kinds of operating conditions during smart spraying dust arrester dedusting operation：
When PLC calculates the water smoke geometry equivalent diameter 0 obtained<d0<At 25 μm, the spray of smart spraying dust arrester
Fog pressure is rated operating pressure P0；
When PLC calculates the 25 μm≤d of water smoke geometry equivalent diameter obtained0<At 50 μm, smart spraying dust arrester
Spraying hydraulic pressure is P1；
When PLC calculates the 50 μm≤d of water smoke geometry equivalent diameter obtained0<At 75 μm, smart spraying dust arrester
Spraying hydraulic pressure is P2；
When PLC calculates the 75 μm≤d of water smoke geometry equivalent diameter obtained0<At 100 μm, smart spraying dedusting dress
It is P to put spraying hydraulic pressure3；
When PLC calculates the water smoke geometry equivalent diameter d obtained0At >=100 μm, the spraying of smart spraying dust arrester
Hydraulic pressure is P4。
As further improved technology scheme, smart spraying dust arrester provided by the invention and dust removal method, the intelligence
Energy spray dust remover, including PLC；The display being connected with the PLC；It is connected with the PLC
Sensor of dust concentration, air velocity transducer and granularity of dust sensor；The high-pressure fog group being connected with the PLC
Part；The high-pressure fog component includes water tank, the high-pressure plunger pump being connected by pipeline with the water tank, by pipeline with it is described
The regulating valve of high-pressure plunger pump discharge connection, the electric check valve being connected by pipeline with the regulating valve, passes through pipeline and institute
State the nozzle of electric check valve connection；The PLC includes being used to realize reception sensor of dust concentration, air velocity transducer
With the real-time online detection signal of granularity of dust sensor, carry out logical operation and send command adapted thereto, start and stop high-pressure fog group
Part, control to adjust valve and realize that the hydrojet pressure of nozzle becomes level regulation, control electric check valve realizes the break-make of control piper.
In the case where not conflicting, above-mentioned improved technology scheme can be implemented alone or in combination.
Water smoke geometry equivalent diameter is the maximum droplet equivalent diameter of operation field accounting example in the present invention；Dust geometry is worked as
Measure the maximum dust equivalent diameter of a diameter of operation field accounting example.The density p of dust grain, and air viscosity coefficient η is according to this
The correlation technique handbook of art librarian use is searched.K is proportionality coefficient, dimensionless, for different types of dust,
Scalefactor value is obtained by testing.
Technical scheme provided by the invention, make water fog particle close with dust granules size in dust removal process, so as to improve
Adsorbing powder dust, filtering, the probability condensed, obtain optimal dust removing effects and efficiency of dust collection；Reduce high-pressure fog dust pelletizing system
Water consumption, the utilization rate of water resource is improved, save system cost；Reduce abrasion of the water under high pressure to parts such as nozzles；Mitigate spray
Influence of the mist to bulk cargo material, reduces the pollution to operating environment.
Brief description of the drawings
Accompanying drawing is used for providing a further understanding of the present invention, forms the part of the application, schematic reality of the invention
Apply example and its illustrate to be used to explain the present invention, do not form inappropriate limitation of the present invention.In the accompanying drawings：
Fig. 1 is the principle schematic diagram of embodiment smart spraying dust arrester.
Embodiment
The embodiment of the present invention is described in further detail below in conjunction with the accompanying drawings.
Smart spraying dust arrester as shown in Figure 1, including PLC 1, the display 2 being connected with PLC 1,
Sensor of dust concentration 3, air velocity transducer 4 and the granularity of dust sensor 5 being connected with PLC 1, connect with PLC 1
The high-pressure fog component connect.High-pressure fog component includes water tank 6, the high-pressure plunger pump 7 being connected by pipeline with water tank 6, passes through
Pipeline and the regulating valve 8 of the outlet of high-pressure plunger pump 7 connection, the electric check valve 9 being connected by pipeline with regulating valve 8, pass through pipe
The nozzle 10 that road is connected with electric check valve 9.The PLC 1 includes being used to realize reception sensor of dust concentration 3, wind
The real-time online detection information of fast sensor 4 and granularity of dust sensor 5, carry out logical operation and send command adapted thereto, start and stop
High-pressure fog component, controls to adjust the hydrojet pressure transformation regulation that valve 8 realizes nozzle 10, and control electric check valve realizes control pipe
The break-make on road.
Alternatively, smart spraying dust arrester provided by the invention, also have and be arranged in water tank 6 and PLC company
The liquid level sensor 11 connect.
Alternatively, smart spraying dust arrester provided by the invention, also there is the filter being arranged on the water inlet pipe of water tank 6
12。
In the smart spraying deduster dedusting course of work, the real-time online of sensor of dust concentration 3 detection dust concentration, wind speed
The real-time online of sensor 4 detects air velocity；The real-time online of granularity of dust sensor 5 detects the equivalent diameter of dust；Dust is dense
Real-time detector data is transferred to PLC 1 by degree sensor 3, air velocity transducer 4 and granularity of dust sensor 5.When dust is dense
When the dust concentration that degree sensor 3 detects reaches preset value, the control of PLC 1 starts smart spraying dust arrester and removed
Dirt operation, high-pressure plunger pump 7, regulating valve 8 and electric check valve 9 are opened, and nozzle 10 sprays vaporific current；When dust concentration senses
When the dust concentration that device 3 detects is less than preset value, PLC 1 controls electronic section of at least closing smart spraying dust arrester
Only valve 9, so as to stop supplying water to nozzle 10.When dust concentration is higher than preset value, PLC 1 is by controlling smart spraying
The aperture of dust arrester regulating valve 8, the spraying hydraulic pressure of nozzle 10 in dedusting operation process is controlled, so as to adjust smart spraying dedusting
The droplet size that nozzle 10 sprays during device dedusting, is optimized the matching of water smoke equivalent diameter and dust equivalent diameter, carried
High dust removing effects and efficiency of dust collection.
The matching optimization process of water smoke equivalent diameter and dust equivalent diameter comprises the following steps in embodiment：Wind speed senses
The real-time online of device 4 detects air velocity v, and the real-time online of granularity of dust sensor 5 detects the geometry equivalent diameter d of dust1, wind speed
The data information transfer that sensor 4 and granularity of dust sensor 5 detect in real time to PLC 1, PLC 1 presses following public affairs
Formula, which calculates, obtains water smoke geometry equivalent diameter d0：
In formula：d1The dust geometry equivalent diameter that-granularity of dust sensor 5 detects, unit：μm
The density of ρ-dust grain, unit：kg·m-3
The air velocity that v-air velocity transducer 4 detects, unit：m·s-1
η-air viscosity coefficient, unit：Pa·s
K-proportionality coefficient, dimensionless
d0- water smoke geometry equivalent diameter, unit：μm；
Smart spraying dust arrester is under different operating pressure, and the water smoke equivalent diameter that nozzle 10 sprays is in 10 μm~100 μ
M, and pressure is bigger, water smoke equivalent diameter is smaller.
The rated operating pressure of smart spraying dust arrester spraying hydraulic pressure is P0, the control smart spraying dedusting of PLC 1
Spraying hydraulic pressure after device decompression is divided into P1、P2、P3And P4Fourth gear, and the minimum operating pressure of smart spraying dust arrester spraying
For P4, their relation meets P0>P1>P2>P3>P4。
Include following five kinds of operating conditions during smart spraying dust arrester dedusting operation：
When PLC 1 calculates the water smoke equivalent diameter 0 obtained<d0<At 25 μm, the spraying of smart spraying dust arrester
Hydraulic pressure is rated operating pressure P0；
When PLC 1 calculates the 25 μm≤d of water smoke equivalent diameter obtained0<At 50 μm, the spray of smart spraying dust arrester
Fog pressure is P1；
When PLC 1 calculates the 50 μm≤d of water smoke equivalent diameter obtained0<At 75 μm, the spray of smart spraying dust arrester
Fog pressure is P2；
When PLC 1 calculates the 75 μm≤d of water smoke equivalent diameter obtained0<At 100 μm, the spray of smart spraying dust arrester
Fog pressure is P3；
When PLC 1 calculates the water smoke equivalent diameter d obtained0At >=100 μm, smart spraying dust arrester spray water
Press as P4。
Technical scheme provided by the invention, make water fog particle close with dust granules size in dust removal process, so as to improve
Adsorbing powder dust, filtering, the probability condensed, obtain optimal dust removing effects and efficiency of dust collection；Reduce high-pressure fog dust pelletizing system
Water consumption, the utilization rate of water resource is improved, save system cost；Reduce abrasion of the water under high pressure to parts such as nozzles；Mitigate spray
Influence of the mist to bulk cargo material, reduces the pollution to operating environment.
It is clear that the invention is not restricted to above preferred embodiment, can also be limited in the claims in the present invention and specification
In spirit, the conversion and improvement of diversified forms are carried out, can solve same technical problem, and technique effect expected from acquirement, therefore
Do not repeat.One of ordinary skill in the art can from present disclosure directly or all schemes for associating, if
Within the spirit that claim limits, protection scope of the present invention is fallen within.
Claims (6)
1. a kind of smart spraying dust arrester, it is characterised in that including PLC (1)；It is connected with the PLC (1)
Display (2)；Sensor of dust concentration (3), air velocity transducer (4) and the granularity of dust being connected with the PLC (1)
Sensor (5)；The high-pressure fog component being connected with the PLC (1)；The high-pressure fog component includes water tank (6), leads to
The high-pressure plunger pump (7) that piping is connected with the water tank (6), connection is exported by pipeline and the high-pressure plunger pump (7)
Regulating valve (8), the electric check valve (9) being connected by pipeline with the regulating valve (8), passes through pipeline and the electric check valve
(9) nozzle (10) of connection；The PLC (1) includes being used to realize reception sensor of dust concentration (3), wind speed sensing
The real-time online detection information of device (4) and granularity of dust sensor (5), carry out logical operation and send command adapted thereto, start and stop are high
Spray assembly is pressed, controls to adjust the hydrojet pressure transformation regulation that valve (8) realizes nozzle (10), control electric check valve realizes control
The break-make of pipeline.
2. smart spraying dust arrester according to claim 1, it is characterised in that also have and be arranged at the water tank (6)
The interior liquid level sensor (11) being connected with the PLC.
3. smart spraying dust arrester according to claim 1 or 2, it is characterised in that also have and be arranged at the water tank
(6) filter on water inlet pipe (12).
4. a kind of smart spraying dust removal method, it is characterised in that comprise the following steps：Sensor of dust concentration (3) real-time online
Detect dust concentration；Air velocity transducer (4) real-time online detects air velocity；Granularity of dust sensor (5) real-time online detects
The geometry equivalent diameter of dust；Sensor of dust concentration (3), air velocity transducer (4) and granularity of dust sensor (5) will be examined in real time
Data transfer is surveyed to PLC (1)；When the dust concentration of sensor of dust concentration (3) detection reaches preset value, PLC controls
Device (1) control smart spraying dust arrester processed carries out dedusting operation；When the dust concentration of sensor of dust concentration (3) detection is less than
During preset value, PLC (1) control smart spraying dust arrester closes the water supply of water mist dust-removing nozzle (10)；When dust is dense
When degree is higher than preset value, PLC (1) is by controlling spraying hydraulic pressure during smart spraying dust arrester dedusting, so as to adjust
Droplet size during smart spraying dust arrester dedusting, make matching for water smoke geometry equivalent diameter and dust geometry equivalent diameter
To optimization, dust removing effects and efficiency of dust collection are improved.
5. smart spraying dust removal method according to claim 4, it is characterised in that the water smoke geometry equivalent diameter and powder
The matching optimization process of dirt geometry equivalent diameter comprises the following steps：
Air velocity transducer (4) real-time online detects air velocity v, and granularity of dust sensor (5) real-time online detects the several of dust
What equivalent diameter d1, data information transfer that air velocity transducer (4) and granularity of dust sensor (5) detect in real time to PLC controls
Device (1), PLC (1) calculates as follows obtains water smoke geometry equivalent diameter d0：
<mrow>
<msub>
<mi>d</mi>
<mn>0</mn>
</msub>
<mo>=</mo>
<mfrac>
<mrow>
<msup>
<msub>
<mi>d</mi>
<mn>1</mn>
</msub>
<mn>2</mn>
</msup>
<mi>&rho;</mi>
<mi>v</mi>
</mrow>
<mrow>
<mn>1.8</mn>
<mo>&times;</mo>
<msup>
<mn>10</mn>
<mn>13</mn>
</msup>
<mo>&times;</mo>
<mi>&eta;</mi>
<mi>k</mi>
</mrow>
</mfrac>
</mrow>
In formula：d1The dust geometry equivalent diameter of-granularity of dust sensor (5) detection, unit：μm
The density of ρ-dust grain, unit：kg·m-3
The air velocity of v-air velocity transducer (4) detections, unit：m·s-1
η-air viscosity coefficient, unit：Pa·s
K-proportionality coefficient, dimensionless
d0- water smoke geometry equivalent diameter, unit：μm；
Smart spraying dust arrester is under different operating pressure, and the water smoke geometry equivalent diameter that nozzle (10) sprays is in 10~100 μ
M, and pressure is bigger, water smoke geometry equivalent diameter is smaller；
The rated operating pressure of smart spraying dust arrester spraying hydraulic pressure is P0, PLC (1) control smart spraying dedusting dress
Put the spraying hydraulic pressure after decompression and be divided into P1、P2、P3And P4Fourth gear, and the minimum operating pressure of smart spraying dust arrester spraying is
P4, their relation meets P0>P1>P2>P3>P4；
Include following five kinds of operating conditions during smart spraying dust arrester dedusting operation：
When PLC (1) calculates the water smoke geometry equivalent diameter 0 obtained<d0<At 25 μm, the spraying of smart spraying dust arrester
Hydraulic pressure is rated operating pressure P0；
When PLC (1) calculates the 25 μm≤d of water smoke geometry equivalent diameter obtained0<At 50 μm, the spray of smart spraying dust arrester
Fog pressure is P1；
When PLC (1) calculates the 50 μm≤d of water smoke geometry equivalent diameter obtained0<At 75 μm, the spray of smart spraying dust arrester
Fog pressure is P2；
When PLC (1) calculates the 75 μm≤d of water smoke geometry equivalent diameter obtained0<At 100 μm, smart spraying dust arrester
Spraying hydraulic pressure is P3；
When PLC (1) calculates the water smoke geometry equivalent diameter d obtained0At >=100 μm, smart spraying dust arrester spray water
Press as P4。
6. the smart spraying dust removal method according to claim 4 or 5, it is characterised in that the smart spraying dust arrester,
Including PLC (1)；The display (2) being connected with the PLC (1)；The powder being connected with the PLC (1)
Dust concentration sensor (3), air velocity transducer (4) and granularity of dust sensor (5)；The high pressure being connected with the PLC (1)
Spray assembly；The high-pressure fog component includes water tank (6), the high-pressure plunger pump being connected by pipeline with the water tank (6)
(7) regulating valve (8) of connection, is exported by pipeline and the high-pressure plunger pump (7), is connected by pipeline and the regulating valve (8)
The electric check valve (9) connect, the nozzle (10) being connected by pipeline with the electric check valve (9)；The PLC (1)
Real-time online including receiving sensor of dust concentration (3), air velocity transducer (4) and granularity of dust sensor (5) for realizing
Detection information, carry out logical operation and send command adapted thereto, start and stop high-pressure fog component, control to adjust valve (8) and realize nozzle
(10) hydrojet pressure becomes level regulation, and control electric check valve realizes the break-make of control piper.
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| CN201710768018.XA CN107349727A (en) | 2017-08-30 | 2017-08-30 | A kind of smart spraying dust arrester and dust removal method |
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Application publication date: 20171117 |