CN110645705A - Double-stage direct-current dedusting heat exchange-free hot blast stove - Google Patents
Double-stage direct-current dedusting heat exchange-free hot blast stove Download PDFInfo
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- CN110645705A CN110645705A CN201911003933.5A CN201911003933A CN110645705A CN 110645705 A CN110645705 A CN 110645705A CN 201911003933 A CN201911003933 A CN 201911003933A CN 110645705 A CN110645705 A CN 110645705A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H3/00—Air heaters
- F24H3/02—Air heaters with forced circulation
- F24H3/027—Air heaters with forced circulation using solid fuel
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- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C4/00—Flame traps allowing passage of gas but not of flame or explosion wave
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J15/00—Arrangements of devices for treating smoke or fumes
- F23J15/02—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H9/00—Details
- F24H9/0052—Details for air heaters
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
- F26B21/001—Drying-air generating units, e.g. movable, independent of drying enclosure
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- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
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Abstract
The invention discloses a two-stage direct-current dedusting heat exchange-free hot blast stove, which comprises a combustion furnace, a fan, a feeding auger and a feeding hopper, and is characterized in that: the dust remover also comprises a primary direct current dust remover, a secondary direct current dust remover, a spark removing device, a hot air cover and an air mixing box, wherein a baffle plate is also arranged in the air mixing box, and the spark removing device enables sparks to be completely combusted after being crushed by compressed air. Compared with the prior art, the invention has the following advantages: the design of no heat exchanger is adopted, and the heat utilization efficiency is high; the two-stage direct current dust removal has small pressure drop, low cost and high dust removal efficiency; the spark removing device promotes the spark to be completely combusted, and is safe and reliable, the air mixing box can flexibly adjust the temperature of hot air, and the adaptability is good.
Description
Technical Field
The invention relates to the field of boiler dust removal, in particular to a double-stage direct-flow dust removal heat exchange-free hot blast stove.
Background
In the prior art, most hot blast stoves use a heat exchanger to exchange heat between flue gas and air and then use the heat of the flue gas, and mainly prevent safety accidents caused by entrainment of particulate matter in the flue gas and the like. Especially in the field of drying inflammable goods such as grains. But the heat exchange process is inevitable to cause energy loss, and the manufacturing and maintenance cost of the equipment is increased. According to the invention, through designing two-stage dust removal, particles and sparks are removed by multiple means, and high efficiency and safe use of heat are ensured.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a double-stage direct-current dedusting heat-exchange-free hot blast stove.
The invention is realized by the following technical scheme: the utility model provides a doublestage direct current removes dust and exempts from heat transfer hot-blast furnace, includes fires burning furnace, fan, pay-off auger and feeding hopper, its characterized in that: the device comprises a combustion furnace, a first-stage direct-current dust remover and a second-stage direct-current dust remover, wherein the first-stage direct-current dust remover and the second-stage direct-current dust remover are sequentially connected to a flue outlet of the combustion furnace in series; second grade direct current dust remover includes that the second grade air current starts to revolve the device, second grade toper kuppe and second grade collection dirt cover, the second grade air current starts to revolve the device and sets up in the export of U type pipe, the export of U type pipe stretches into in the second grade collection dirt cover, second grade toper kuppe is the cavity coniform and sets up in second grade collection dirt cover, the top point of second grade toper kuppe exports towards U type pipe, afterbody at second grade toper kuppe is provided with the hot-blast main, the entry of hot-blast main stretches into in the second grade collection dirt cover and the afterbody of directional second grade toper kuppe, the export.
As a further improvement of the scheme, the top tips of the primary conical air guide sleeve and the secondary conical air guide sleeve respectively extend into the flue outlet and the U-shaped pipe outlet, and the U-shaped pipe inlet and the hot air pipe inlet respectively extend into the tail parts of the primary conical air guide sleeve and the secondary conical air guide sleeve.
As a further improvement to the above scheme, the two-stage direct-current dust removal heat-exchange-free hot blast stove further comprises a spark removing device, the spark removing device comprises an air compressor and a high-pressure spray nozzle, the high-pressure spray nozzle penetrates through the side wall of the flue and points to the center of the flue, and the high-pressure spray nozzle is arranged in the middle section of the flue.
As a further improvement to the above scheme, the high-pressure spray head is a sand blasting gun head, an air pipe interface of the sand blasting gun head is connected with an air compressor, and a sand pipe interface of the sand blasting gun head is communicated with the bottom of the primary dust collecting sleeve or the secondary dust collecting sleeve.
As a further improvement to the scheme, the top tip of the primary conical air guide sleeve faces downwards, and an ash discharge pipe is arranged at the top tip of the primary conical air guide sleeve and communicated with the bottom of the primary dust collection sleeve.
As a further improvement of the proposal, the bottom of the primary dust collecting sleeve or the secondary dust collecting sleeve is obliquely arranged, and the lowest part of the bottom of the primary dust collecting sleeve or the secondary dust collecting sleeve is provided with an ash discharge passage communicated with an ash chamber of the combustion furnace.
As a further improvement to the scheme, the outlet of the ash discharge channel is communicated with the ash chamber through an ash conveying auger. The ash content can be initiatively carried to the auger, can control the air current at both ends not circulate simultaneously to effectively prevent the short circuit of crossing wind.
As a further improvement to the scheme, the ash chamber is provided with an ash discharging auger to discharge ash slag.
As a further improvement to the above scheme, the two-stage direct-current dust removal heat-exchange-free hot blast stove further comprises a hot air cover and an air mixing box, the combustion furnace, the first-stage direct-current dust remover, the second-stage direct-current dust remover, the U-shaped pipe and the hot air pipe are arranged in the hot air cover, the air mixing box is arranged between the fan and the outlet of the hot air pipe, an air inlet and an air outlet are arranged on the hot air cover, the outlets of the air outlet and the hot air pipe are communicated with the air mixing box, a cold air inlet and an air mixing outlet are further arranged on the air mixing box, the air mixing outlet is connected with the inlet of the fan, and regulating valves are arranged at the air inlet.
As a further improvement to the above scheme, the outlet of the hot air pipe, the air outlet and the cold air inlet are all communicated with the bottom of the air mixing box, the air mixing outlet is arranged at the top of the air mixing box, and the air mixing box is internally provided with a baffle plate.
Compared with the prior art, the invention has the following advantages: the design of no heat exchanger is adopted, and the heat utilization efficiency is high; the two-stage direct current dust removal has small pressure drop, low cost and high dust removal efficiency; the spark removing device promotes the spark to be completely combusted, and is safe and reliable, the air mixing box can flexibly adjust the temperature of hot air, and the adaptability is good.
Drawings
FIG. 1 is a diagram of the present invention.
Detailed Description
The following examples are given for the detailed implementation and specific operation of the present invention, but the scope of the present invention is not limited to the following examples.
The utility model provides a doublestage direct current removes dust and exempts from heat transfer hot-blast furnace, includes fires burning furnace 1, fan 8, pay-off auger 12 and feeding hopper 13, its characterized in that: the primary direct current dust remover and the secondary direct current dust remover are sequentially connected to the outlet of a flue 11 of the combustion furnace 1 in series, the primary direct current dust remover is connected with the secondary direct current dust remover through a U-shaped pipe 5, the primary direct current dust remover comprises a primary airflow swirling device 21, a primary conical guide cover 22 and a primary dust collecting sleeve 23, the primary airflow swirling device 21 is arranged at the inlet of the flue 11 of the combustion furnace 1, the primary conical guide cover 22 is in a hollow conical shape and is arranged in the primary dust collecting sleeve 23, the outlet of the flue 11 penetrates through the side wall of the primary dust collecting sleeve 23 and extends into the primary dust collecting cover, the top tip of the primary conical guide cover 22 faces the outlet of the flue 11, and the inlet of the U-shaped pipe 5 extends into the primary dust collecting cover from one side of the tail of the primary conical guide cover 22; the second-stage direct current dust collector comprises a second-stage airflow rotation starting device 31, a second-stage conical air guide sleeve 32 and a second-stage dust collection sleeve 33, the second-stage airflow rotation starting device 31 is arranged at the outlet of the U-shaped pipe 5, the outlet of the U-shaped pipe 5 extends into the second-stage dust collection sleeve 33, the second-stage conical air guide sleeve 32 is in a hollow conical shape and is arranged in the second-stage dust collection sleeve 33, the top tip of the second-stage conical air guide sleeve 32 faces the outlet of the U-shaped pipe 5, a hot air pipe 6 is arranged at the tail of the second-stage conical air guide sleeve 32, the inlet of the hot air pipe 6 extends into the second-stage dust collection sleeve 33 and faces the tail of the. This scheme is through designing the direct current dust removal mode of second grade, with the particulate matter separation in the flue gas, need not the heat transfer and directly sends the place that needs with the energy that fires burning furnace 1 production, has avoided the calorific loss that the heat transfer caused. The smoke is conveyed forwards in a rotating mode through the primary air flow rotation starting device 21 and the secondary air flow rotation starting device 31, so that particles in the smoke are thrown to the side wall of the conveying pipeline and are removed after friction deceleration, the primary conical air guide sleeve 22 and the secondary conical air guide sleeve 32 are used, smaller particles are forced to move towards the side wall of the primary dust collection sleeve and the side wall of the secondary dust collection sleeve, the situation that the smoke located near the rotating axis cannot be removed due to insufficient centrifugal force can be effectively avoided, the smoke turns over the edges of the primary conical air guide sleeve 22 and the secondary conical air guide sleeve 32 in the rotating process and then enters the conveying path again, and the smoke particles are fully removed in the moving process; the loss of airflow pressure drop is small in the direct-current dust removal process, so that the operation cost is not greatly increased by secondary direct-current dust removal.
The top tips of the first-stage conical air guide sleeve 22 and the second-stage conical air guide sleeve 32 respectively extend into the outlet of the flue 11 and the outlet of the U-shaped pipe 5, and the inlet of the U-shaped pipe 5 and the inlet of the hot air pipe 6 respectively extend into the tails of the first-stage conical air guide sleeve 22 and the second-stage conical air guide sleeve 32. The arrangement makes the structure more compact, on the other hand makes the flue gas fully turn in the process of rotating and advancing, and fully rubs with the inner and outer walls of the first-stage conical air guide sleeve 22 and the second-stage conical air guide sleeve 32, so that the removal rate of the smoke dust is improved.
The double-stage direct-current dedusting heat-exchange-free hot blast stove further comprises a spark removing device, the spark removing device comprises an air compressor 41 and a high-pressure spray nozzle 42, the high-pressure spray nozzle 42 penetrates through the side wall of the flue 11 and points to the center of the flue 11, and the high-pressure spray nozzle 42 is arranged in the middle section of the flue 11. After the primary airflow rotation starting device 21, particles in the flue gas including the spark are thrown to the side wall, high-speed compressed gas is sprayed into through a high-pressure collision head, the smoke particles can collide and break, the contact area of the spark and the air is increased, and in addition, oxygen fed into the compressed air is supplemented, so that the spark is quickly burnt out, and the spark is prevented from threatening subsequent production.
The high-pressure spray head 42 is a sand blasting gun head, the air pipe interface of the sand blasting gun head is connected with the air compressor 41, and the sand pipe interface of the sand blasting gun head is communicated with the bottom of the primary dust collecting sleeve 23 or the secondary dust collecting sleeve 33. The smoke dust in the primary dust collecting sleeve 23 or the secondary dust collecting sleeve 33 is sprayed into the flue 11 through the sand blasting gun head, so that the collision degree between the spark and the smoke dust can be increased, the spark is fully cracked and then burnt out, and meanwhile, the kinetic energy of particles is lost due to collision, so that the particles are separated.
The top tip of the primary conical air guide sleeve 22 faces downwards, and an ash discharge pipe 24 is arranged at the top tip of the primary conical air guide sleeve 22 and communicated with the bottom of the primary dust collection sleeve 23. Because the top point sets up downwards, can have the dust to pile up in one-level toper kuppe 22, send away the ash content through setting up dust exhaust pipe 24, can effectively reduce and shut down the maintenance, reduce the maintenance frequency.
The primary dust collecting sleeve 23 and/or the secondary dust collecting sleeve 33 are obliquely arranged at the bottom, and an ash discharge channel 343 is arranged at the lowest position of the bottom of the primary dust collecting sleeve 23 and/or the secondary dust collecting sleeve 33 and is communicated with the ash chamber 14 of the combustion furnace 1.
The outlet of the ash discharge channel 343 is communicated with the ash chamber 14 through an ash conveying auger 35. The ash content can be initiatively carried to the auger, can control the air current at both ends not circulate simultaneously to effectively prevent the short circuit of crossing wind.
The ash chamber 14 is provided with an ash discharging auger 15 for discharging ash slag.
The two-stage direct-current dedusting heat-exchange-free hot blast stove further comprises a hot air cover 9 and an air mixing box 7, the combustion furnace 1, the first-stage direct-current deduster, the second-stage direct-current deduster, the U-shaped pipe 5 and the hot air pipe 6 are arranged in the hot air cover 9, the air mixing box 7 is arranged between the fan 8 and the outlet of the hot air pipe 6, an air inlet 91 and an air outlet 92 are arranged on the hot air cover 9, the outlets of the air outlet 92 and the hot air pipe 6 are communicated with the air mixing box 7, a cold air inlet 72 and an air mixing outlet 73 are further arranged on the air mixing box 7, the air mixing outlet 73 is connected with the inlet of the fan 8, and regulating valves are arranged at the air inlet 91, the air outlet 92, the. The hot air cover 9 covers the combustion furnace 1, the primary direct current dust remover, the secondary direct current dust remover, the U-shaped pipe 5 and the hot air pipe 6, the heat dissipated by the structures is recycled into the air mixing box 7 through airflow flow to be mixed with the smoke of the combustion furnace 1, the temperature in the air mixing box 7 is adjusted by the air fed from the cold air inlet 72, and finally the hot air meeting the requirements is fed into a required position by the fan 8. On one hand, all heat is effectively recovered, and simultaneously, the hot air taste can be flexibly configured to meet different requirements.
The outlet of the hot air pipe 6, the air outlet 92 and the cold air inlet 72 are all communicated with the bottom of the air mixing box 7, the air mixing outlet 73 is arranged at the top of the air mixing box 7, and the baffle plate 74 is arranged in the air mixing box 7. The three air flows can be fully mixed and exchanged after being baffled by the baffling plate, so that the quality of hot air is stable.
The present invention is not limited to the above preferred embodiments, and any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The utility model provides a doublestage direct current removes dust and exempts from heat transfer hot-blast furnace, includes fires burning furnace, fan, pay-off auger and feeding hopper, its characterized in that: the primary direct-current dust remover and the secondary direct-current dust remover are sequentially connected to a flue outlet of the combustion furnace in series, the primary direct-current dust remover is connected with the secondary direct-current dust remover through a U-shaped pipeline, the primary direct-current dust remover comprises a primary airflow rotation starting device, a primary conical air guide sleeve and a primary dust collecting sleeve, the primary airflow rotation starting device is arranged at the flue inlet of the combustion furnace, the primary conical air guide sleeve is in a hollow conical shape and is arranged in the primary dust collecting sleeve, the outlet of the flue penetrates through the side wall of the primary dust collecting sleeve and extends into the primary dust collecting sleeve, the top tip of the primary conical air guide sleeve faces the flue outlet, and the inlet of the U-shaped pipeline extends into the primary dust collecting sleeve from one side of the tail of the primary conical air guide sleeve; the secondary direct current dust collector comprises a secondary airflow rotation starting device, a secondary conical air guide sleeve and a secondary dust collection sleeve, the secondary airflow rotation starting device is arranged at the outlet of the U-shaped pipe, the outlet of the U-shaped pipe extends into the secondary dust collection sleeve, the secondary conical air guide sleeve is in a hollow conical shape and is arranged in the secondary dust collection sleeve, the top tip of the secondary conical air guide sleeve faces the outlet of the U-shaped pipe, a hot air pipe is arranged at the tail part of the secondary conical air guide sleeve, the inlet of the hot air pipe extends into the secondary dust collection sleeve and points to the tail part of the secondary conical air guide sleeve, and the outlet of the hot air pipe is connected with the fan.
2. The dual-stage direct-flow dedusting heat-exchange-free hot blast stove as claimed in claim 1, characterized in that: the top tips of the first-stage conical air guide sleeve and the second-stage conical air guide sleeve respectively extend into the flue outlet and the U-shaped pipe outlet, and the U-shaped pipe inlet and the hot air pipe inlet respectively extend into the tails of the first-stage conical air guide sleeve and the second-stage conical air guide sleeve.
3. The dual-stage direct-flow dedusting heat-exchange-free hot blast stove as claimed in claim 1, characterized in that: the double-stage direct-current dedusting heat-exchange-free hot blast stove further comprises a spark removing device, the spark removing device comprises an air compressor and a high-pressure spray head, the high-pressure spray head penetrates through the side wall of the flue and points to the center of the flue, and the high-pressure spray head is arranged in the middle section of the flue.
4. The dual-stage direct-flow dedusting heat-exchange-free hot blast stove as claimed in claim 3, characterized in that: the high-pressure spray head is a sand blasting gun head, an air pipe interface of the sand blasting gun head is connected with the air compressor, and a sand pipe interface of the sand blasting gun head is communicated with the bottom of the primary dust collecting sleeve or the secondary dust collecting sleeve.
5. The dual-stage direct-flow dedusting heat-exchange-free hot blast stove as claimed in claim 1, characterized in that: the top tip of the first-stage conical flow guide cover faces downwards, and an ash discharge pipe is arranged at the top tip of the first-stage conical flow guide cover and communicated with the bottom of the first-stage dust collection sleeve.
6. The dual-stage direct-flow dedusting heat-exchange-free hot blast stove as claimed in claim 1, characterized in that: the bottom of the primary dust collecting sleeve and/or the secondary dust collecting sleeve is obliquely arranged, and the lowest part of the bottom of the primary dust collecting sleeve and/or the secondary dust collecting sleeve is provided with an ash discharge passage communicated with an ash chamber of the combustion furnace.
7. The dual-stage direct-flow dedusting heat-exchange-free hot blast stove of claim 6, characterized in that: the outlet of the ash discharge channel is communicated with the ash chamber through an ash conveying auger. The ash content can be initiatively carried to the auger, can control the air current at both ends not circulate simultaneously to effectively prevent the short circuit of crossing wind.
8. The dual-stage direct-flow dedusting heat-exchange-free hot blast stove of claim 7, characterized in that: the ash chamber is provided with an ash discharge auger to discharge ash.
9. The dual-stage direct-flow dedusting heat-exchange-free hot blast stove as claimed in claim 1, characterized in that: the two-stage direct-current dust removal heat-exchange-free hot blast stove further comprises a hot air cover and an air mixing box, the combustion furnace, the primary direct-current dust remover, the secondary direct-current dust remover, the U-shaped pipe and the hot air pipe are all arranged in the hot air cover, the air mixing box is arranged between the fan and the outlet of the hot air pipe, an air inlet and an air outlet are arranged on the hot air cover, the air outlet and the outlet of the hot air pipe are all communicated with the air mixing box, a cold air inlet and an air mixing outlet are further arranged on the air mixing box, the air mixing outlet is connected with the inlet of the fan, and regulating valves are arranged on the air inlet, the air outlet, the outlet of the hot air pipe and the cold.
10. The dual-stage direct-flow dedusting heat-exchange-free hot blast stove of claim 9, characterized in that: the outlet of the hot air pipe, the air outlet and the cold air inlet are communicated with the bottom of the air mixing box, the air mixing outlet is arranged at the top of the air mixing box, and a baffle plate is arranged in the air mixing box.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911003933.5A CN110645705B (en) | 2019-10-22 | 2019-10-22 | Double-stage direct-current dedusting heat exchange-free hot blast stove |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911003933.5A CN110645705B (en) | 2019-10-22 | 2019-10-22 | Double-stage direct-current dedusting heat exchange-free hot blast stove |
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| CN110645705B CN110645705B (en) | 2021-12-07 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113188131A (en) * | 2021-05-10 | 2021-07-30 | 扬州海通电子科技有限公司 | Safe type high temperature furnace gas discharging equipment |
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| JPH10185430A (en) * | 1996-12-19 | 1998-07-14 | Marushin Noki Kk | Dust collector for grain dryer |
| CN2416965Y (en) * | 2000-02-14 | 2001-01-31 | 朱蕴安 | Dry/wet two method type whirlwind dust remover for vertical natural air supply type coal boiler |
| CN102192591A (en) * | 2011-05-09 | 2011-09-21 | 广州迪森热能技术股份有限公司 | Vertical biomass hot blast heater |
| CN202350301U (en) * | 2011-11-24 | 2012-07-25 | 合肥麦稻之星机械科技有限公司 | Rice hull hot air furnace capable of fully combusting rice hulls |
| CN204320007U (en) * | 2014-11-17 | 2015-05-13 | 安徽宁国中天环保设备有限公司 | A kind of high-temperature flue gas purification equipment of biomass boiler |
| CN106016734A (en) * | 2016-06-16 | 2016-10-12 | 怀远县通达机械制造有限公司 | Energy-saved and environment-friendly hot-blast stove |
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2019
- 2019-10-22 CN CN201911003933.5A patent/CN110645705B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10185430A (en) * | 1996-12-19 | 1998-07-14 | Marushin Noki Kk | Dust collector for grain dryer |
| CN2416965Y (en) * | 2000-02-14 | 2001-01-31 | 朱蕴安 | Dry/wet two method type whirlwind dust remover for vertical natural air supply type coal boiler |
| CN102192591A (en) * | 2011-05-09 | 2011-09-21 | 广州迪森热能技术股份有限公司 | Vertical biomass hot blast heater |
| CN202350301U (en) * | 2011-11-24 | 2012-07-25 | 合肥麦稻之星机械科技有限公司 | Rice hull hot air furnace capable of fully combusting rice hulls |
| CN204320007U (en) * | 2014-11-17 | 2015-05-13 | 安徽宁国中天环保设备有限公司 | A kind of high-temperature flue gas purification equipment of biomass boiler |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113188131A (en) * | 2021-05-10 | 2021-07-30 | 扬州海通电子科技有限公司 | Safe type high temperature furnace gas discharging equipment |
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Effective date of registration: 20211123 Address after: 221400 No. 13, yaocao Road, yaowan Town, Xinyi City, Xuzhou City, Jiangsu Province Applicant after: Jiangsu weitongru automation equipment Co.,Ltd. Address before: 230001 56 1401, Hanjia urban forest community, Qianshan Road, Shushan District, Hefei City, Anhui Province Applicant before: Mei Lizhong |
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