CN209205001U - A kind of flue gas using air circulation takes off white system - Google Patents
A kind of flue gas using air circulation takes off white system Download PDFInfo
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- CN209205001U CN209205001U CN201822009742.7U CN201822009742U CN209205001U CN 209205001 U CN209205001 U CN 209205001U CN 201822009742 U CN201822009742 U CN 201822009742U CN 209205001 U CN209205001 U CN 209205001U
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- air
- tower
- flue gas
- white
- heat exchange
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/30—Technologies for a more efficient combustion or heat usage
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Abstract
The utility model discloses a kind of flue gases using air circulation to take off white system, including air heat exchanger, desulfurizing tower, de- White Tower, it from the bottom to top successively include dehumidification heat exchange, mixer in de- White Tower, dehumidification heat exchange is tubular heat exchanger structure, de- White Tower is connected to by the tube side of dehumidification heat exchange up and down, several turbine leaf fans of installation, the gas inlet for taking off White Tower are arranged in de- White Tower lower part in the tubulation of dehumidification heat exchange；The gas inlet of the exhanst gas outlet connection desulfurizing tower of air heat exchanger, the exhanst gas outlet of desulfurizing tower connects de- White Tower gas inlet, the outlet of the shell side import connection air blower of dehumidification heat exchange, the shell-side outlet of dehumidification heat exchange connects a wind inlet of mixer by primary wind pipe, the shell-side outlet of dehumidification heat exchange connects the air intlet of air heat exchanger by air flow pipeline, the secondary air inlet of the air outlet slit connection mixer of air heat exchanger takes off the flue gas in White Tower and successively passes through the discharge at the top of de- White Tower of dehumidification heat exchange, mixer.
Description
Technical field
The utility model belongs to fume treatment field, is related to the technology of flue gas removing white cigarette, and in particular to a kind of using empty
The flue gas of gas circulation takes off white system.
Background technique
Here statement only provides background information related with the utility model, without necessarily constituting the prior art.
Low temperature is saturated wet flue gas directly through smoke stack emission, mixes with the lower ambient air of temperature, a large amount of water in flue gas
Steam is condensed into droplet to the cold, refraction or scattering process through light, and white or grey is presented in wet flue gas, i.e., so-called
" white cigarette ".In order to eliminate the influence of " white cigarette " to environment, need to carry out flue gas to take off white processing.
Flue gas on existing market takes off Bai Doushi after desulfurizing tower or deduster, increases a gas-water heat exchanger, or
Person, which increases a spray column, reduces smoke temperature, and water temperature increases while reducing smoke temperature, in order to enable water to be recycled, also wants
Increase a cooling tower, while to increase water circulating pump, not only increases investment in this way, occupied area is also big, especially some works
Factory space is small, can not arrange so more equipment, flue gas, which takes off white engineering, to be implemented.
Utility model content
It is white that the utility model utilizes air to take off, and cools down first with air to flue gas, and wash rice goes out the moisture in flue gas, empty
Temperature degree also increases, and the air after being increased using temperature is mixed with the flue gas that wash rice goes out moisture.Smoke temperature raising is discharged into atmosphere again, disappears
In addition to plume, it is white to have achieved the purpose that flue gas takes off.
To achieve the goals above, the technical solution of the utility model are as follows:
A kind of flue gas using air circulation takes off white system, including air heat exchanger, desulfurizing tower, de- White Tower, it is described take off it is white
Tower erects setting, from the bottom to top successively includes dehumidification heat exchange, air-flue gas mixer, and the dehumidification heat exchange changes for tubulation
De- White Tower is connected to by the tube side of hot device structure, dehumidification heat exchange up and down, if axially mounted by tubulation in the tubulation of dehumidification heat exchange
Dry turbine leaf fan, the gas inlet for taking off White Tower are arranged in de- White Tower lower part, and the gas inlet of de- White Tower is located at dehumidification heat exchange
Lower section takes off the exhanst gas outlet setting of White Tower at the top of de- White Tower；
The gas inlet of the exhanst gas outlet connection desulfurizing tower of air heat exchanger, the exhanst gas outlet of desulfurizing tower connect de- White Tower cigarette
Gas import, the outlet of the shell side import connection air blower of dehumidification heat exchange, the shell-side outlet of dehumidification heat exchange pass through First air
Pipeline connects wind inlet of air-flue gas mixer, and the shell-side outlet of dehumidification heat exchange is connected by air flow pipeline
The air outlet slit of the air intlet of air heat exchanger, air heat exchanger connects air-flue gas mixer secondary air inlet, takes off white
Flue gas in tower successively passes through the discharge at the top of de- White Tower of dehumidification heat exchange, mixer.
Preferably, moisture trap is equipped in described de- White Tower, the moisture trap setting is connecing air-flue gas mixing
Between device and dehumidification heat exchange.The outlet of the moisture trap is equipped with inner cylinder, the outer diameter of inner cylinder and moisture trap
The outer diameter of outlet is equal.
Preferably, deduster is equipped between desulfurizing tower and de- White Tower.
Preferably, the gas inlet for taking off White Tower is equipped with booster fan, the outlet of booster fan connect the flue gas of de- White Tower into
Mouthful.
Preferably, air flow pipeline, which is equipped with, shunts blower, shunts the outlet of blower and the air intlet of air heat exchanger
Connection.
Preferably, the gas inlet of air heat exchanger is equipped with flue gas blower, and the outlet of flue gas blower connects air heat exchanger
Gas inlet.
Preferably, the import of air flow pipeline is arranged on primary wind pipe wall.
Preferably, fixed link is equipped in the tubulation of dehumidification heat exchange, vortex leaf fan is fixed in fixed link.
Preferably, air-flue gas mixer is that gas disturbs baffle, and gas disturbance baffle is vertical with the axis of de- White Tower,
Wind inlet of air-flue gas mixer and secondary air inlet are arranged above gas disturbance baffle.
The utility model has the following beneficial effects:
1. the utility model is using air to flue gas cool-down, wash rice goes out moisture, while air themperature increases, and recycles this sky
Gas is mixed with low-temperature flue gas, increases smoke temperature, is eliminated plume, is reached and take off white requirement.
2. the utility model flue gas, which takes off white process, does not consume water, it can reduce flue gas and take off white cost.
3. the utility model carries out air once to heat up and secondary liter respectively by dehumidification heat exchange and air heat exchanger
Temperature enters air-flue gas mixer ratio, it can be achieved that finally discharging fume by controlling primary heating air and secondary temperature elevation air
The adjusting of temperature.
4. fume afterheat is directly utilized in the utility model, the raising smoke temperature process of smoke exhaust process does not need to increase heat exchange
Device.
5. the utility model cools down to flue gas using air, so that the process for reducing smoke temperature does not have to cooling tower, not yet
With spray column, invest small.
6. dehumidification heat exchange and de- White Tower one, reduce space occupied in the utility model.
7. the system of the utility model when flue gas takes off white, to flue gas there are also further dust removing effects, enables flue gas to reach
Ultra-clean discharge.
Detailed description of the invention
The Figure of description for constituting a part of this disclosure is used to provide further understanding of the disclosure, and the disclosure is shown
Meaning property embodiment and its explanation do not constitute the improper restriction to the disclosure for explaining the disclosure.
Fig. 1 is the structural schematic diagram of Tthe utility model system；
Fig. 2 is the structural schematic diagram of the utility model dehumidification heat exchange tubulation；
Fig. 3 is the top view of Fig. 2；
Fig. 4 is air-flue gas mixer structural schematic diagram；
Wherein, 1, flue gas blower, 2, air heat exchanger, 3, desulfurizing tower, 4, wet electric precipitator, 5, booster fan, 6, air
Blower, 7, dehumidification heat exchange, 8, moisture trap, 9, inner chimney, 10, air-flue gas mixer, 11, trunk of funnel, 12, take off it is white
Tower, 13, shunting blower, 14, vortex leaf fan, 15, fixed link, 16, fixed frame, 17, gas disturbance baffle.
Specific embodiment
It is noted that described further below be all exemplary, it is intended to provide further instruction to the disclosure.Unless another
It indicates, all technical and scientific terms used herein has usual with disclosure person of an ordinary skill in the technical field
The identical meanings of understanding.
It should be noted that term used herein above is merely to describe specific embodiment, and be not intended to restricted root
According to the illustrative embodiments of the disclosure.As used herein, unless the context clearly indicates otherwise, otherwise singular
Also it is intended to include plural form, additionally, it should be understood that, when in the present specification using term "comprising" and/or " packet
Include " when, indicate existing characteristics, step, operation, device, component and/or their combination.
As background technique is introduced, white investment and the biggish deficiency of occupied area are taken off to flue gas using water, to understand
Technical problem certainly as above, the present disclosure proposes a kind of flue gases using air circulation to take off white system and technique.
A kind of exemplary embodiment of the disclosure provides a kind of flue gas using air circulation and takes off white system, including sky
Gas heat exchanger, desulfurizing tower, de- White Tower, described de- White Tower erect setting, from the bottom to top successively include dehumidification heat exchange, air-cigarette
Gas mixer, the dehumidification heat exchange are tubular heat exchanger structure, and de- White Tower is connected to by the tube side of dehumidification heat exchange up and down, dehumidifying
By the axially mounted several turbine leaf fans of tubulation in the tubulation of heat exchanger, the gas inlet for taking off White Tower is arranged in de- White Tower lower part, and
The gas inlet of de- White Tower is located at below dehumidification heat exchange, takes off the exhanst gas outlet setting of White Tower at the top of de- White Tower；
The gas inlet of the exhanst gas outlet connection desulfurizing tower of air heat exchanger, the exhanst gas outlet of desulfurizing tower connect de- White Tower cigarette
Gas import, the outlet of the shell side import connection air blower of dehumidification heat exchange, the shell-side outlet of dehumidification heat exchange pass through First air
Pipeline connects wind inlet of air-flue gas mixer, and the shell-side outlet of dehumidification heat exchange is connected by air flow pipeline
The air outlet slit of the air intlet of air heat exchanger, air heat exchanger connects air-flue gas mixer secondary air inlet, takes off white
Flue gas in tower successively passes through the discharge at the top of de- White Tower of dehumidification heat exchange, mixer.
Air is to the waste heat of flue gas using being that adverse current carries out, and flue gas is cooled down twice, and air is heated up twice,
Unheated air exchanges heat with the flue gas after cooling, and the air after heating exchanges heat again with the flue gas not cooled down, energy
The waste heat of flue gas is enough fully utilized.Second, due to using the air after primary heating and the air after reheating and flue gas into
Row mixing, can control the temperature of smoke evacuation.Third increases several vortex leaves fans in dehumidification heat exchange, so that flue gas is in tubulation
Rotational flow had not only increased heat exchange efficiency of the flue gas in tubulation, but also increase flue gas rotation, under the influence of centrifugal force,
Droplet and dust are flowed to tube wall, are mutually collided during the motion and are condensed into larger drop, drop is thrown toward cylinder inboard wall
Surface, contact latter with slurries are fallen into the drop layer of wall surface attachment, realizes that dedusting removes water.
In one or more embodiments of the embodiment, moisture trap, the air water point are equipped in described de- White Tower
Air-is being connect between flue gas mixer and dehumidification heat exchange from device setting.Moisture in flue gas can further be removed.It is described
The outlet of moisture trap is equipped with inner cylinder, and the outer diameter of outlet of outer diameter and moisture trap of inner cylinder is equal.
In one or more embodiments of the embodiment, deduster is equipped between desulfurizing tower and de- White Tower.It can remove
Most of dust in flue gas reduces de- White Tower to the treating capacity of smoke dust, provides processing of the de- White Tower to moisture in flue gas
Efficiency.The deduster is wet electric precipitator.
In one or more embodiments of the embodiment, the gas inlet for taking off White Tower is equipped with booster fan, booster fan
Outlet connect the gas inlet of de- White Tower.Increase flue gas and enter the rate of de- White Tower, to provide de- White Tower to water in flue gas
The removal efficiency divided.
In one or more embodiments of the embodiment, air flow pipeline, which is equipped with, shunts blower, shunts going out for blower
Mouth is connected to the air intlet of air heat exchanger.The ratio of primary heating air and reheating air can be controlled, to mention
High exhaust gas temperature.
In one or more embodiments of the embodiment, the gas inlet of air heat exchanger is equipped with flue gas blower, flue gas
The gas inlet of the outlet connection air heat exchanger of blower.Increase the kinetic energy that flue gas flows in system.
In one or more embodiments of the embodiment, the import of air flow pipeline is arranged in primary wind pipe wall
On.
In one or more embodiments of the embodiment, fixed link, vortex leaf fan are equipped in the tubulation of dehumidification heat exchange
It is fixed in fixed link.The axis of the fixed link is overlapped with the axis of tubulation.Fixed link both ends are equipped with fixed frame, and fixed link is logical
Fixed frame is crossed to connect with heat exchanging pipe.
In one or more embodiments of the embodiment, air-flue gas mixer is that gas disturbs baffle, gas disturbance
Baffle is vertical with the axis of de- White Tower, and wind inlet of air-flue gas mixer and secondary air inlet are arranged at gas and disturb
Above dynamic baffle.Wind inlet of air-flue gas mixer and secondary air inlet are directed to gas disturbance baffle.
In order to enable those skilled in the art can clearly understand the technical solution of the disclosure, below with reference to tool
The technical solution of the disclosure is described in detail in the embodiment of body.
Embodiment
A kind of flue gas using air circulation takes off white system, as shown in Figures 1 to 3, by air heat exchanger 2, desulfurizing tower 3, wet
Electric precipitator 4, de- White Tower 12 form.
The tower body of de- White Tower 12 is to erect setting trunk of funnel 11, from the bottom to top successively includes dehumidification heat exchange 7, gas-water separation
Device 8, air-flue gas mixer 10, the outlet of moisture trap 8 are equipped with inner chimney 9, the outer diameter and moisture trap 8 of inner chimney 9
Outlet outer diameter it is equal.Dehumidification heat exchange 7 is tubular heat exchanger structure, and the tube side of dehumidification heat exchange 7 is by de- about 12 White Tower
Connection, the tubulation of dehumidification heat exchange 7 is interior to fan 14 by the axially mounted several turbine leafs of tubulation, is equipped in the tubulation of dehumidification heat exchange 7
Fixed link 15, vortex leaf fan 14 are fixed in fixed link 15, and the axis of fixed link 15 is overlapped with the axis of tubulation.De- White Tower 12
Gas inlet is arranged in de- 12 lower part of White Tower, and the gas inlet of de- White Tower 12 is located at 7 lower section of dehumidification heat exchange, takes off White Tower 12
Exhanst gas outlet setting is at de- 12 top of White Tower.
The gas inlet of the exhanst gas outlet connection desulfurizing tower 3 of air heat exchanger 2, the wet electric precipitation of the exhanst gas outlet of desulfurizing tower 3
The gas inlet of device 4, the import of the exhanst gas outlet connection booster fan 5 of wet electric precipitator 4, the outlet connection of booster fan 5 are de-
12 gas inlet of White Tower, the outlet of the shell side import connection air blower 6 of dehumidification heat exchange 7, the shell-side outlet of dehumidification heat exchange 7
Wind inlet of air-flue gas mixer 10 is connected by primary wind pipe, the shell-side outlet of dehumidification heat exchange 7 passes through air
Shunt conduit connects the air intlet of air heat exchanger 2, and the air outlet slit of air heat exchanger 2 connects air-flue gas mixer 10
Secondary air inlet, the flue gas in de- White Tower 12 successively passes through dehumidification heat exchange 7, moisture trap 8, inner chimney 9, air-cigarette
The discharge at the top of de- White Tower of gas mixer 10.
Air flow pipeline, which is equipped with, shunts blower 13, and the air intlet of the outlet and air heat exchanger 2 that shunt blower 13 connects
It is logical.
The gas inlet of air heat exchanger 2 is equipped with flue gas blower 1, the cigarette of the outlet connection air heat exchanger 2 of flue gas blower 1
Gas import.
The flue gas generated in production, through flue gas blower 1 boosting after enter air heat exchanger 2, with through shunt blower 13
Air carry out heat exchange in air heat exchanger 2, flue-gas temperature enters desulfurizing tower 3 after reducing and carries out desulfurization, makes flue gas sulfur-bearing
Amount reaches discharge standard, enters back into wet electric precipitator 4, then enter de- White Tower 12 through flue gas booster fan 5, in de- White Tower 12,
Heat exchange is carried out in dehumidification heat exchange 7 with the new air of air blower 6, smoke temperature reduces.Before entering de- White Tower due to flue gas, warp
Desulfurization and wet electric precipitation are crossed, flue gas has reached saturation, into after dehumidification heat exchange 7, carries out heat exchange, temperature drop with new air
It is low.Flue gas becomes supersaturated flue gas from saturated flue gas, the water condensation in flue gas.
Flue gas rises in de- White Tower 12, and into moisture trap 8, air water is further separated.Subsequently into air-flue gas
Mixer 10 mixes, mixed flue gas with the air to heat up in dehumidification heat exchange 7 and the air after the heating of air heat exchanger 2
Temperature increases, and relative humidity substantially reduces, and being discharged into atmosphere at this time, there will be no water mist phenomenons.It can't see chimney and emit white cigarette, reach
It has arrived flue gas and has taken off white purpose.
The critical component of dehumidification heat exchange 7 is setting vortex leaf fan 14 inside tubulation, and when work, flue gas flows from bottom to top
Dynamic, since the guiding role of vortex leaf fan 14 rises flue gas rotation, under the influence of centrifugal force, droplet and dust are to tube wall stream
It is dynamic, larger drop is mutually collided and is condensed into during the motion, and drop is thrown toward tubulation inner wall surface, the liquid with wall surface attachment
Drop layer contact is latter with slurries are fallen into, and realizes dedusting water outlet.
De- White Tower: flue gas flows in de- White Tower.Flue gas cools down through heat exchanger 7, and air heats up through heat exchanger 7, due to cigarette
Gas cooling becomes supersaturated flue gas, and most of water wash rice in flue gas goes out, and de- White Tower bottom discharge is flowed on tubulation.De- White Tower
The top of interior heat exchanger 7 is provided with moisture trap 8, further makes the gas-water separation of flue gas.Air-flue gas is arranged at de- White Tower top
Mixer 10, mixes well with air flue gas, and the temperature of flue gas is discharged into atmosphere after increasing.Except the heat exchanging pipe of warm heat exchanger 7:
Heat exchanging pipe is provided with multiple vortex leaf fans 14, and leaf fan is fixed using fixed link 15, and fixed link both ends are equipped with fixed frame 16,
Fixed link 15 is connect by fixed frame 16 with heat exchanging pipe.Flue gas rises through vortex leaf fan rotation, under the influence of centrifugal force, water
Drop is got rid of to bucket wall, and de- White Tower bottom discharge is by gravity flowed into.
Air-flue gas mixer 10 as shown in figure 4, for gas disturb baffle 17, gas disturbance baffle 17 setting take off it is white
In tower 12, gas disturbance baffle 17 is vertical with the axis of de- White Tower 12, wind inlet of air-flue gas mixer and Secondary Air
Import is arranged at 17 top of gas disturbance baffle, and wind inlet of air-flue gas mixer and secondary air inlet refer both to
Baffle 17 is disturbed to gas.After flue gas encounters gas disturbance baffle 17 from bottom to top, flue gas is spread around, First air, secondary
Wind is also spread around after encountering gas disturbance baffle 17, and such First air, Secondary Air and flue gas can be sufficiently mixed, and then be arranged
Enter atmosphere.
New air boosts through air blower 6, into except warm heat exchanger 7, carries out heat exchange with flue gas, reduces flue-gas temperature,
Wash rice goes out the saturated water in flue gas, and after air themperature increases, portion of air is directly entered air-flue gas mixer 10, another portion
Point air enters air heat exchanger 2 through shunting blower 13, carries out heat exchange with flue gas in air heat exchanger 2, air themperature into
One step increases, and subsequently into air-flue gas mixer 10, after being sufficiently mixed with flue gas and primary air, is discharged into atmosphere through chimney.
The foregoing is merely preferred embodiment of the present disclosure, are not limited to the disclosure, for the skill of this field
For art personnel, the disclosure can have various modifications and variations.It is all within the spirit and principle of the disclosure, it is made any to repair
Change, equivalent replacement, improvement etc., should be included within the protection scope of the disclosure.
Claims (10)
1. a kind of flue gas using air circulation takes off white system, characterized in that including air heat exchanger, desulfurizing tower, de- White Tower, institute
It states de- White Tower and erects setting, from the bottom to top successively include dehumidification heat exchange, air-flue gas mixer, the dehumidification heat exchange is
De- White Tower is connected to by the tube side of tubular heat exchanger structure, dehumidification heat exchange up and down, axial by tubulation in the tubulation of dehumidification heat exchange
Several turbine leaf fans are installed, the gas inlet for taking off White Tower is arranged in de- White Tower lower part, and the gas inlet of de- White Tower is located at dehumidifying
Below heat exchanger, the exhanst gas outlet setting of White Tower is taken off at the top of de- White Tower；
The gas inlet of the exhanst gas outlet connection desulfurizing tower of air heat exchanger, the exhanst gas outlet of desulfurizing tower connect de- White Tower flue gas into
Mouthful, the outlet of the shell side import connection air blower of dehumidification heat exchange, the shell-side outlet of dehumidification heat exchange passes through primary wind pipe
Wind inlet of air-flue gas mixer is connected, the shell-side outlet of dehumidification heat exchange connects air by air flow pipeline
The air outlet slit of the air intlet of heat exchanger, air heat exchanger connects air-flue gas mixer secondary air inlet, takes off in White Tower
Flue gas successively pass through the discharge at the top of de- White Tower of dehumidification heat exchange, mixer.
2. the system as claimed in claim 1, characterized in that be equipped with moisture trap, the gas-water separation in described de- White Tower
Device setting is connecing air-between flue gas mixer and dehumidification heat exchange.
3. system as claimed in claim 2, characterized in that the outlet of the moisture trap is equipped with inner cylinder, inner cylinder
Outer diameter is equal with the outer diameter of the outlet of moisture trap.
4. the system as claimed in claim 1, characterized in that be equipped with deduster between desulfurizing tower and de- White Tower.
5. the system as claimed in claim 1, characterized in that the gas inlet of de- White Tower is equipped with booster fan, booster fan
Outlet connects the gas inlet of de- White Tower.
6. the system as claimed in claim 1, characterized in that air flow pipeline, which is equipped with, shunts blower, shunts the outlet of blower
It is connected to the air intlet of air heat exchanger.
7. the system as claimed in claim 1, characterized in that the gas inlet of air heat exchanger is equipped with flue gas blower, flue gas wind
The gas inlet of the outlet connection air heat exchanger of machine.
8. the system as claimed in claim 1, characterized in that the import of air flow pipeline is arranged on primary wind pipe wall.
9. the system as claimed in claim 1, characterized in that be equipped with fixed link in the tubulation of dehumidification heat exchange, vortex leaf fan is solid
It is scheduled in fixed link.
10. the system as claimed in claim 1, characterized in that air-flue gas mixer is that gas disturbs baffle, gas disturbance
Baffle is vertical with the axis of de- White Tower, and wind inlet of air-flue gas mixer and secondary air inlet are arranged at gas and disturb
Above dynamic baffle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822009742.7U CN209205001U (en) | 2018-11-30 | 2018-11-30 | A kind of flue gas using air circulation takes off white system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822009742.7U CN209205001U (en) | 2018-11-30 | 2018-11-30 | A kind of flue gas using air circulation takes off white system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209205001U true CN209205001U (en) | 2019-08-06 |
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ID=67462547
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| CN201822009742.7U Active CN209205001U (en) | 2018-11-30 | 2018-11-30 | A kind of flue gas using air circulation takes off white system |
Country Status (1)
| Country | Link |
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| CN (1) | CN209205001U (en) |
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2018
- 2018-11-30 CN CN201822009742.7U patent/CN209205001U/en active Active
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