CN207929001U - A kind of SCR equipment for denitrifying flue gas - Google Patents
A kind of SCR equipment for denitrifying flue gas Download PDFInfo
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- CN207929001U CN207929001U CN201721870375.9U CN201721870375U CN207929001U CN 207929001 U CN207929001 U CN 207929001U CN 201721870375 U CN201721870375 U CN 201721870375U CN 207929001 U CN207929001 U CN 207929001U
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Abstract
The utility model is related to a kind of SCR equipment for denitrifying flue gas comprising economizer, reactor and the flue being connected between economizer and reactor, flue include the first segment for being sequentially connected setting, second segment and third section；Third section is equipped with blocker, blocker includes set on the ash bucket of the lower section of third section and along the pre- lotus portion that airflow direction is set gradually and adsorption section, pre- lotus portion includes pre electrified anode plate and pre electrified cathode line, keep dust negatively charged for generating electric field, adsorption section includes anode adsorption net and electric discharge cathode line, for generating electric field and adsorbing negatively charged dust.The SCR equipment for denitrifying flue gas can effectively improve pre- dust removing effects, mitigate blocking and abrasion of the dust to catalyst, and then extend the service life of catalyst.
Description
Technical field
The utility model is related to gas denitrifying technology field, specially a kind of SCR equipment for denitrifying flue gas.
Background technology
Selective catalytic reduction (SCR, selective catalyst reactive) gas denitrifying technology is to apply at present
Most commonly used Flue Gas Denitrification Technologies on Coal-fired Boilers has the advantages that denitration efficiency is high, selectivity is good, stable and reliable operation.Its
Main operational principle is the NO in flue gas under the conditions of 280~420 DEG CXWith the reducing agent NH sprayed by SCR front end smoke canals3It is urging
Reduction reaction occurs under the action of agent, generates N2And H2O。
Existing SCR denitration device generally uses the high dirt arrangement that relatively economical is applicable in, and SCR denitration device is arranged in
Between economizer and air preheater, exhaust gas dust concentration is high.Due to the grey characteristic of the height of China's coal quality, into the height of SCR denitration device
Concentration dust particles (general ＞ 20g/Nm3) easily cause the abrasion of catalyst, block and be even poisoned, directly affect the anti-of catalyst
Activity and service life are answered, the operating cost of SCR system is increased.
In view of the above-mentioned problems, patent CN 204395633U in the prior art disclose a kind of pre- dedusting of SCR denitrating flue gas
Device, in economizer bottom, ash bucket makes improvement, specific as shown in Figure 1, the SCR denitrating flue gas pre-dedusting devices include successively
Economizer hopper 101, first level flue 104, uptake flue 106, the second horizontal flue 107 and the SCR reactors of connection
108.The grey deflector 102 of setting gear, the pipe of the entrance bottom of first level flue 104 at the air outlet of economizer hopper 101
Dust-proof plate 103 is installed on road inner wall, ammonia-spraying grid 105 is installed in uptake flue 106, close to air inlet in SCR reactors 108
Homogenating plate 109 is installed, 109 lower section of homogenating plate is corrugated plating catalyst 110 at mouthful.The pre- dedusting structure passes through in economizer bottom
Economizer hopper 101, and the grey deflector 102 of setting gear, dust-proof plate 103 at the economizer hopper 101 are set, by gravity and
The big grain size dust in inertial collision effect removal part.
The SCR denitrating flue gas pre-dedusting devices are primarily present problems with：It is big to carry out flow flue section, is blocked by inertial collision
It cuts and the dust of gravity collection is less, flue gas flow velocity in the horizontal direction after turning is big, and gravity also is difficult to send out
The effect of waving so that the only prodigious dust of part grain size can just be captured, and arresting efficiency is relatively low.
In addition, patent CN106268049A in the prior art discloses a kind of SCR denitration pre-dedusting device and method,
Ammonia spraying device upstream bottom turns to flue lower end and pre- dust arrester installation is arranged, specifically as shown in Fig. 2, the device includes sequential communication
Horizontal flue 201 turns to flue 202 and vertical flue 203, is provided with if turning to 202 great circle arc side-wall outer side lower end of flue
Dry-ash System pipe 204；Drainage plate 207 is installed in the lower part of vertical flue 203, and the outside lower end for turning to 202 orthodrome side of flue is set
It is equipped with ash bucket 205, the top entry of ash bucket 205 is connected with the dust export except ash pipe 204, and the bottom of ash bucket 205 is provided with row
Grey mouth 206.The dedusting collection apparatus for ash is using the separation and filtration for turning to flue 202 except the inertial collision of ash pipe 204 removes
The part large dust particle of orthodrome outboard end side wall.
The SCR denitration dedusting collection apparatus for ash is primarily present problems with：Dedusting region only includes turning to 202 orthodrome of flue
The outside of side, since the position flue gas flow rate is larger (up to 20m/s or more), particulate matter does the time of centrifugation operation in flue gas
Shorter, only the prodigious dust of small part grain size by larger centrifugal force due to can just be got rid of to great circle arc side-wall outer side.
Therefore, the pre- dust removing effects of SCR equipment for denitrifying flue gas how are improved, blocking of the dust to catalyst is effectively mitigated
And abrasion, extend the service life of catalyst, is a technical problem to be solved urgently to one skilled in the art.
Utility model content
The purpose of this utility model is to provide a kind of SCR equipment for denitrifying flue gas, can effectively improve pre- dust removing effects, mitigates powder
Blocking and abrasion of the dirt to catalyst, and then extend the service life of catalyst.
In order to solve the above technical problems, a kind of SCR of the utility model offer (selective catalystreactive,
Selective catalytic reduction) equipment for denitrifying flue gas comprising economizer, reactor and it is connected to the economizer and the reactor
Between flue, the flue includes the first segment for being sequentially connected setting, second segment and third section；The third section, which is equipped with, to be intercepted
Device, the blocker include set on the ash bucket of the lower section of the third section and along the pre- lotus portion that airflow direction is set gradually and suction
Attached portion, the pre- lotus portion include pre electrified anode plate and pre electrified cathode line, make pre-charged dust, the suction for generating electric field
Attached portion includes anode adsorption net and electric discharge cathode line, for generating electric field and adsorbing the dust with pre electrified.
Blocker is set in third section, which includes ash bucket, pre- lotus portion and adsorption section, wherein pre- lotus portion includes pre-
Charged anode plate and pre electrified cathode line, the pre electrified anode plate and pre electrified cathode line form high voltage electric field, enable to cigarette
Pre-charged dust in gas；Adsorption section includes anode adsorption net and electric discharge cathode line, is similarly formed high voltage electric field therebetween, makes
When obtaining the dust with pre electrified by the electric field, anode adsorption net will be adsorbed under the action of electric field force.Therefore, flue gas stream
When through third section, dust keeps its negatively charged by the pre- lotus portion of blocker, by being adsorbed on anode adsorption net when adsorption section,
It is i.e. intercepted.And ash bucket is set to the lower section of third section, ash-laden gas from second segment after entering in the third section, the big grain size in part
Dust will be fallen under gravity into ash bucket, meanwhile, the dust particles adsorbed by anode adsorption net also will be in gravity
Under the action of fall in ash bucket.
SCR equipment for denitrifying flue gas provided by the utility model is blocked by the effect of gravity, inertial collision and electric field force
Budgust dirt enters reactor, has higher pre- efficiency of dust collection, and can effectively intercept large-sized dust, mitigates SCR cigarettes
Abrasion and blocking of the dust to catalyst in qi exhaustion nitre system operation, to extend the service life of catalyst.
Optionally, the section width of the third section is more than the section width of the second segment.
Optionally, the third section is equipped with undergauge step, and the undergauge step is formed along the radial direction of the third section
Dust block board, the dust block board are located at the one end of the ash bucket towards airflow downstream.
Optionally, the quantity of the ash bucket and the undergauge step is two, and towards the airflow downstream direction
The dust block board is located at the bottom of the anode adsorption net.
Optionally, deflector is equipped in the corner between the second segment and the third section, the deflector is formed
The pre electrified anode plate.
Optionally, the end of the third section towards the reactor side is ramp structure.
Optionally, the blocker further includes rapping component, and the rapping component acts on the anode adsorption net, to shake
Fall the dust of the anode adsorption net absorption.
Optionally, the section indention structure of the anode adsorption net or multiple sequentially connected trapezium structures.
Optionally, the anode adsorption net is obliquely installed, and the upper end is tilted towards the pre- lotus portion.
Optionally, the mesh of the anode adsorption net is square or regular hexagon.
Description of the drawings
Fig. 1 is the structural schematic diagram of the first SCR denitrating flue gas pre-dedusting device in the prior art；
Fig. 2 is the structural schematic diagram of second of SCR denitrating flue gas pre-dedusting devices in the prior art；
Fig. 3 is the structural schematic diagram for the SCR equipment for denitrifying flue gas that the utility model embodiment is provided；
Fig. 4 is the enlarged drawing of A in Fig. 3；
Fig. 5 is the front view of the anode adsorption net in Fig. 4；
Fig. 6 be anode adsorption net section be multiple sequentially connected trapezium structures when Fig. 5 vertical view；
Fig. 7 be anode adsorption net section be zigzag when Fig. 5 vertical view；
Fig. 8 be mesh be in regular hexagon when anode adsorption net structural schematic diagram.
In attached drawing 1-2, the reference numerals are as follows：
101- economizer hoppers；The grey deflector of 102- gears；103- dust-proof plates；104- first level flues；
105- ammonia-spraying grids；106- uptake flues；The second horizontal flues of 107-；108- reactors；109- homogenating plates；110-
Catalyst；
201- horizontal flues；202- turns to flue；The vertical flues of 203-；204- removes ash pipe；205- ash buckets；206- ash discharges
Mouthful；207- drainage plates.
In attached drawing 3-7, the reference numerals are as follows：
1- economizers, 11- economizer hoppers；2- reactors；
31- first segments, 32- second segments, 33- third sections；
The pre- lotus portions 41-, 411- pre electrified anode plates, 412- pre electrified cathode lines, the adsorption sections 42-, 421- anode adsorption nets,
422- electric discharge cathode lines, 43- ash buckets, 44- dust block boards, 45- rapping components；
5- ammonia-gas spraying devices；6- ammonia/nitrogen mixer；7- catalyst；8- ash pipelines；9- fairings.
Specific implementation mode
In order to make those skilled in the art more fully understand the technical solution of the utility model, below in conjunction with the accompanying drawings and have
The utility model is described in further detail for body embodiment.
Please refer to Fig.3 and Fig. 4, Fig. 3 be the SCR equipment for denitrifying flue gas that the utility model embodiment is provided structural representation
Figure；Fig. 4 is the enlarged drawing of A in Fig. 3.
The utility model embodiment provides a kind of SCR (selective catalyst reactive, selective catalysis
Reduction) equipment for denitrifying flue gas, as shown in Figure 3 and Figure 4, which includes economizer 1, reactor 2 and is connected to
Flue between economizer 1 and reactor 2；Wherein, third section 33 is equipped with blocker, which includes ash bucket 43 and along gas
The pre- lotus portion 41 and adsorption section 42 that stream direction is set gradually, ash bucket 43 are set to the lower section of third section 33, and pre- lotus portion 41 includes pre- lotus
Electric anode plate 411 and pre electrified cathode line 412, can form therebetween high voltage electric field so that the pre-charged dust in flue gas；
Adsorption section 42 includes anode adsorption net 421 and electric discharge cathode line 422, is similarly formed high voltage electric field therebetween so that with pre-
When charged dust passes through the electric field, anode adsorption net 421 will be adsorbed under the action of electric field force.
When flue gas flows through third section 33, dust makes its pre electrified by pre- lotus portion 41, by being adsorbed on when adsorption section 42
Anode adsorption net 421, i.e., it is intercepted.And ash bucket 43 is set to the lower section of third section 33, ash-laden gas is somebody's turn to do from the entrance of second segment 32
After in third section 33, the big grain size dust in part will be fallen under gravity into ash bucket 43, meanwhile, by anode adsorption net
421 dust particles adsorbed also will under gravity be fallen in ash bucket 43, defeated eventually by being connect with ash bucket 43
Ash pipe 8 is discharged.
In the SCR equipment for denitrifying flue gas that the present embodiment is provided, the reticular structure of anode adsorption net 421 can be touched by inertia
Hit and large dust particle intercepted, also, the anode adsorption net 421 also by the effect of electric field force to the dust in flue gas into
Row intercepts, and has higher pre- efficiency of dust collection, can effectively intercept large-sized dust can mitigate powder in SCR system operational process
Abrasion and blocking of the dirt to catalyst 7, to extend the service life of catalyst 7.
In the present embodiment, specific requirement is not done to pre electrified cathode line 412 and electric discharge cathode line 422, can be used such as prickle
The forms such as line or jaggies.Meanwhile specific requirement is not also done to the material of each anode and cathode component, such as select carbon steel or other
Wear-resistant conductive material.
In the above-described embodiments, the section width of third section 33 be more than second segment 32 section width, therefore, flue gas from
When second segment 32 enters third section 33, air velocity reduces, and increases residence time of the flue gas in third section 33, and then extend
The pre electrified time of dust so that the abundant pre electrified of dust in flue gas is conducive to the progress of dustproof function.
Meanwhile ammonia-gas spraying device 5 and ammonia/nitrogen mixer 6 are equipped in second segment 32, ammonia-gas spraying device 5 is for providing SCR flue gases
The ammonia of denitration reaction, ammonia/nitrogen mixer 6 are used to strengthen the immixture of ammonia and flue gas.It is mixed by ammonia/nitrogen mixer 6
Flue gas afterwards, when entering the larger third section 33 of section width, air velocity slows down, when can increase the mixing of ammonia and flue gas
Between, be conducive to ammonia density and be evenly distributed, improves denitration efficiency.
In the above-described embodiments, third section 33 is equipped with undergauge step, radial direction shape of the undergauge step along third section 33
At dust block board 44, and the dust block board 44 is located at ash bucket 43 towards one end of airflow downstream.That is, the third section 33 is in rank
Ladder type tapered configuration.After entering in third section 33, air velocity reduces flue gas, and large dust particle is settled down to the bottom of flue,
And under the blocking of dust block board 44 so that large dust particle is fallen to along dust block board 44 in ash bucket 43, further increases pre- dedusting
Effect.
In the above-described embodiments, the quantity of ash bucket 43 and undergauge step is two, i.e., the quantity of dust block board 44 is also two
It is a, at this point, the dust block board 44 of airflow downstream side is located at the bottom of anode adsorption net 421.Certainly, in the present embodiment, to ash
The quantity of bucket 43 is simultaneously not particularly limited, and is set to one or more.When one ash bucket 43 is set, or to ensure
The larger ash bucket 43 of volume can be selected in specific collection area, and when multiple ash buckets 43 are set, it is (i.e. more to may also set up multiple dust block boards 44
A undergauge step), i.e., the third section 33 divides multiple stages tapered.When the quantity of ash bucket 43 is set as two, single ash bucket 43
It is small, it is at low cost, meanwhile, relative to being arranged for multiple ash buckets 43, overall structure can be simplified.In addition, airflow downstream one
The dust block board 44 of side is located at the bottom of anode adsorption net 421, can effectively avoid and there are problems that dust stratification dead angle.
In the above-described embodiments, corner, second segment 32 and third section of the flue between first segment 31 and second segment 32
Corner between corner and third section 33 and reactor 2 between 33 etc. is interior to be equipped with deflector, so that flue gas is stablized
Circulation.In the present embodiment, the deflector of the corner between second segment 32 and third section 33 is set as above-mentioned pre electrified anode plate
411.That is, the pre electrified anode plate 411 is set to the corner between second segment 32 and third section 33, led being risen to flue gas
While stream acts on, electric field is formed with pre electrified cathode line 412, makes pre-charged dust.Certainly, in the present embodiment, pre electrified
The specific location and shape of anode plate 411 do not require, but deflector is set as pre electrified anode plate 411, can simplify entirety
Structure, meanwhile, the smoke flow resistance in flue can be reduced.
It is additionally provided with fairing 9 between flue and reactor 2, so that flue flow field is uniform, helps to reduce resistance
Loss.In the present embodiment, as shown in figure 3, the end of 33 orientating reaction device of third section, 2 side is ramp structure, flue gas flows through
The ramp structure enters before reactor, will be squeezed by the ramp structure so that right part air-flow can be toward reactor 2
Left side flowing so that being more uniformly distributed into the flow field of reactor 2.
In the present embodiment, by the end of 33 orientating reaction device of third section, 2 side be designed as the direct horizontal extension in bottom with
Reactor 2 connects, and top is the scheme of ramp structure, can letter compared to tilting section is separately set between third section 33 and reactor 2
Change overall structure, good economy performance.
In the above-described embodiments, blocker further includes rapping component 45, when the powder that the surface of anode adsorption net 421 is adsorbed
When dirt is more, to ensure its adsorption capacity, by 45 rapping of the rapping component anode adsorption net 421, make the powder of its adsorption
The bottom that dirt, which is shaken, to be fallen, and fall into third section 33 enters in ash bucket 43, is discharged eventually by ash pipeline 8.The rapping apparatus is set
It sets and is cleared up convenient for the dust adsorbed to anode adsorption net 421, meanwhile, without dismounting or operation suspension in scale removal process
Deng, operation it is more convenient.
Fig. 5-7 is please referred to, Fig. 5 is the front view of the anode adsorption net in Fig. 4；Fig. 6 is that the section of anode adsorption net is more
The vertical view of Fig. 5 when a sequentially connected trapezium structure；Fig. 7 be anode adsorption net section be zigzag when Fig. 5 vertical view；
Fig. 8 be mesh be in regular hexagon when anode adsorption net structural schematic diagram.
The section of anode adsorption net 421 is in multiple sequentially connected trapezium structures (see Fig. 6) or zigzag structure (see figure
7), such setting can increase the adsorption area of the anode adsorption net 421, improve its adsorption capacity.Meanwhile by anode adsorption net
421 are obliquely installed, and in the case where the internal diameter of residing flue is certain, the anode adsorption net 421 being obliquely installed can effectively increase it
Specific collection area.And the top of the anode adsorption net 421 is tilted towards pre- 41 side of lotus portion, then may make to work as is made by rapping apparatus
The dust of its adsorption shakes can smoothly fall into ash bucket 43 when falling.
Meanwhile the trepanning of the anode adsorption net 421 is set as square or regular hexagon (as shown in Figure 8), it is each to reduce
Footprint between hole, and then reduce gas-flow resistance, pass through convenient for flue gas.Certainly, in the present embodiment, this can also be opened
Hole is designed as other polygons, is not particularly limited herein.
Specifically, as shown in Figure 3 and Figure 4, the SCR equipment for denitrifying flue gas that the utility model embodiment is provided it is worked
Journey and principle can be summarized as follows：
(1) ash-laden gas enters the first segment 31 of flue from 1 bottom of economizer, when by 1 bottom of economizer, big of part
Grain dust will be collected under gravity and effect of inertia by economizer hopper 11；
(2) flue gas by first segment 31 enter second segment 32 after, by with the NH from ammonia-gas spraying device 53It contacts and by ammonia/nitrogen
The effect of mixer 6 is mixed, and enters third section 33 later；
(3) flue gas is set to the pre electrified sun of the corner when passing through the corner between second segment 32 and third section 33
Pole plate 411 had both played guide functions or had played pre electrified anode, the pre electrified anode plate 411 and the formation of pre electrified cathode line 412
High voltage electric field makes pre-charged dust in the flue gas of process；Shape between electric discharge cathode line 422 and anode the absorption version of adsorption section 42
At high voltage electric field so that the dust of pre electrified is intercepted under the action of electric field force by anode adsorption net 421 in flue gas；It is adsorbed in
The dust on 421 surface of anode adsorption net can shake under the action of rapping component 45 to be fallen and enters ash bucket 43 by gravitational settling
It is interior；
Anode adsorption net 421 is reticular structure, and the dust of greater particle size is lost dynamic by the inertial collision with reticular structure
Can and be intercepted, settle under the effect of gravity in ash bucket 43；
Meanwhile flue gas when entering third section 33 since the internal diameter of flue becomes larger, flue gas flow rate reduces, part large dust particle
Two-stage ash bucket 43 will be settled under the effect of gravity, also, pass through two-stage dust block board positioned at the flue gas of lower part in third section 33
44, part large dust particle is fallen by the inertial collision and gravity with two-stage dust block board 44 in ash bucket 43；
(4) flue gas is after 33 rectified device 9 of third section, and even flow field simultaneously enters in reactor 2, in the work of catalyst 7
Under, the NH in flue gas3And NOXReaction generates H2O and N2。
Above are merely preferred embodiments of the utility model, it is noted that for the ordinary skill people of the art
For member, without departing from the principle of this utility model, several improvements and modifications can also be made, these improvements and modifications
Also it should be regarded as the scope of protection of the utility model.
Claims (10)
1. a kind of SCR equipment for denitrifying flue gas, including economizer (1), reactor (2) and it is connected to the economizer (1) and described
Flue between reactor (2), the flue include the first segment (31), second segment (32) and third section for being sequentially connected setting
(33)；
It is characterized in that, the third section is equipped with blocker, the blocker includes the ash bucket set on the lower section of the third section
(43) and along airflow direction the pre- lotus portion (41) set gradually and adsorption section (42), the pre- lotus portion (41) include pre electrified sun
Pole plate (411) and pre electrified cathode line (412) make pre-charged dust for generating electric field, and the adsorption section (42) includes anode
Adsorption net (421) and electric discharge cathode line (422), for generating electric field and adsorbing the dust with pre electrified.
2. SCR equipment for denitrifying flue gas according to claim 1, which is characterized in that the section width of the third section (33)
More than the section width of the second segment (32).
3. SCR equipment for denitrifying flue gas according to claim 2, which is characterized in that the third section (33) is equipped with undergauge platform
Rank, the undergauge step form dust block board (44) along the radial direction of the third section (33), and the dust block board (44) is located at institute
Ash bucket (43) is stated towards one end of airflow downstream.
4. SCR equipment for denitrifying flue gas according to claim 3, which is characterized in that the ash bucket (43) and the undergauge platform
The quantity of rank is two, and is located at the anode adsorption net towards the dust block board (44) in the airflow downstream direction
(421) bottom.
5. according to claim 1-4 any one of them SCR equipment for denitrifying flue gas, which is characterized in that the second segment (32) and
Deflector is equipped in corner between the third section (33), the deflector forms the pre electrified anode plate (411).
6. according to claim 1-4 any one of them SCR equipment for denitrifying flue gas, which is characterized in that third section (33) court
It is ramp structure to the end of the reactor (2) side.
7. according to claim 1-4 any one of them SCR equipment for denitrifying flue gas, which is characterized in that the blocker further includes
Rapping component (45), the rapping component (45) act on the anode adsorption net (421), and the anode adsorption net is fallen to shake
(421) dust adsorbed.
8. according to claim 1-4 any one of them SCR equipment for denitrifying flue gas, which is characterized in that the anode adsorption net
(421) section indention structure or multiple sequentially connected trapezium structures.
9. according to claim 1-4 any one of them SCR equipment for denitrifying flue gas, which is characterized in that the anode adsorption net
(421) it is obliquely installed, the upper end is tilted towards the pre- lotus portion (41).
10. according to claim 1-4 any one of them SCR equipment for denitrifying flue gas, which is characterized in that the anode adsorption net
(421) mesh is square or regular hexagon.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201721870375.9U CN207929001U (en) | 2017-12-27 | 2017-12-27 | A kind of SCR equipment for denitrifying flue gas |
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| CN201721870375.9U CN207929001U (en) | 2017-12-27 | 2017-12-27 | A kind of SCR equipment for denitrifying flue gas |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109316954A (en) * | 2018-10-26 | 2019-02-12 | 安徽工业大学 | A method of utilizing multilayer catalytic degradation sintering flue gas pollutant |
| TWI715256B (en) * | 2018-10-22 | 2021-01-01 | 大陸商上海必修福企業管理有限公司 | System for removing dust |
-
2017
- 2017-12-27 CN CN201721870375.9U patent/CN207929001U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI715256B (en) * | 2018-10-22 | 2021-01-01 | 大陸商上海必修福企業管理有限公司 | System for removing dust |
| CN109316954A (en) * | 2018-10-26 | 2019-02-12 | 安徽工业大学 | A method of utilizing multilayer catalytic degradation sintering flue gas pollutant |
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| CB03 | Change of inventor or designer information | ||
| CB03 | Change of inventor or designer information |
Inventor after: Ye Xinglian Inventor after: Ye Kai Inventor after: Zhang Chucheng Inventor after: Guo Jun Inventor after: Yang Ding Inventor after: Su Yinbiao Inventor after: An Xizhong Inventor after: Yu Aibing Inventor before: Ye Xinglian Inventor before: Ye Kai Inventor before: Zhang Chucheng Inventor before: Guo Jun Inventor before: Yang Ding Inventor before: Su Yinbiao Inventor before: An Xizhong Inventor before: Yu Aibing |