CN103589460A - Waste heat boiler process water-cooled wall coal water slurry gasification furnace provided with ignition furnace end - Google Patents
Waste heat boiler process water-cooled wall coal water slurry gasification furnace provided with ignition furnace end Download PDFInfo
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- CN103589460A CN103589460A CN201210293031.1A CN201210293031A CN103589460A CN 103589460 A CN103589460 A CN 103589460A CN 201210293031 A CN201210293031 A CN 201210293031A CN 103589460 A CN103589460 A CN 103589460A
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- process water
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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
- Y02E20/16—Combined cycle power plant [CCPP], or combined cycle gas turbine [CCGT]
- Y02E20/18—Integrated gasification combined cycle [IGCC], e.g. combined with carbon capture and storage [CCS]
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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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
- Y02P20/129—Energy recovery, e.g. by cogeneration, H2recovery or pressure recovery turbines
Abstract
The invention discloses a waste heat boiler process water-cooled wall coal water slurry gasification furnace provided with an ignition furnace end. The waste heat boiler process water-cooled wall coal water slurry gasification furnace comprises a furnace body, a radiation waste heat boiler, a gasification chamber, a slag gas outlet, a slag gas inlet, a crude synthesis gas outlet, a slag bathroom and a deslagging port, an inner side water cooled wall and an outer side water cooled wall, wherein the gasification chamber is arranged in the furnace body; the inner wall of the gasification chamber is of a wall cooled wall type structure; the slag gas outlet is arranged in the furnace body; the slag gas inlet, the crude synthesis gas outlet, the slag bathroom and the deslagging port are arranged in the radiation waste heat boiler; the inner side water cooled wall and the outer side water cooled wall are arranged in the radiation waste heat boiler; and the slag gas outlet of the furnace body is connected with the slag gas inlet of the radiation waste heat boiler. The waste heat boiler process water-cooled wall coal water slurry gasification furnace also comprises at least one ignition furnace end; the inner cavity of the ignition furnace end is communicated with the gasification chamber, a nozzle mounting hole for inserting an ignition spray nozzle and mounting a feeding nozzle are arranged on the ignition furnace end, and the inner cavity is constructed by refractory bricks or casted with refractory materials. The waste heat boiler process water-cooled wall coal water slurry gasification furnace provided with the ignition furnace end is capable of solving a problem that when an existing water-cooled wall coal water slurry gasification furnace is started, ignition is difficult.
Description
Technical field
The present invention relates to coal chemical technology, relate in particular to the pot destroying process water wall coal slurry gasifier of a kind of set-point stove head.
Background technology
Gasification is the important component part of clean coal technology, it becomes clean coal gas by cheap coal conversion, both can be used for production chemical product, as synthetic ammonia, synthesizing methanol, synthetic natural gas, dimethyl ether synthesis, synthesizing glycol etc., also can be used for direct and indirect liquefaction, the combined cycle generation (IGCC) of coal and turn to the basic fields such as Poly-generation with coal gas.
Coal gasifying process mainly comprises fixed bed gasification, fluidized-bed gasification, entrained flow gasification.Entrained flow gasification is the gasification of a kind of cocurrent flow type, and it is to using coal water slurry or dry pulverized coal as raw material, is sent into vapourizing furnace, makes coal water slurry or dry pulverized coal combustion gasification in vapourizing furnace, thereby completes reaction.Wherein, coal water slurry is the mixture being mixed with by certain requirement by coal, water and chemical additive, there is good mobility and stability, be easy to store, aerosolizable burning, be the fuel of the more high and low pollution of a kind of efficiency of combustion, more cheap cleaning, there is the advantages such as flameholding, disposal of pollutants are few.At present, the coal water slurry of usining generally all adopts refractory brick as liner as the vapourizing furnace of raw material, but because refractory brick has a lot of shortcomings as the vapourizing furnace of liner, such as refractory brick at high temperature easily weathers, the life-span is short; For the replacing of refractory brick, on the one hand, refractory brick is expensive, and frequent replacing improved cost; On the other hand, its replacement cycle is long, and needs to stop, cause the problem that production efficiency is low, cost increases while changing.In order to overcome these shortcomings, people start to develop the coal slurry gasifier of water wall structure.
Chinese patent literature CN2898030Y discloses a kind of wall water-cooling coal slurry gasifier, this wall water-cooling coal slurry gasifier comprises pressure-bearing shell, burner hearth district in pressure-bearing shell and Quench pipe, also be included in the water wall that the burner hearth district in pressure-bearing shell arranges, the prior art adopts water wall structure to replace the refractory brick of pressure-bearing shell liner, because pass through mobile water in water wall, water temp is more much lower than refractory brick, although temperature is very high in burner hearth, and the wall temperature of water wall can be too not high, thereby make the work-ing life of water wall longer, guaranteed the macrocyclic continuous operation of vapourizing furnace, greatly less maintenance work, saved expense.But owing to containing a large amount of moisture in coal water slurry, itself be difficult for lighting, add water wall heat radiation very fast, in stove, cannot store the heat that makes to maintain in stove certain temperature, thereby the instantaneous ignition of the vapourizing furnace that makes water wall structure coal water slurry when starting is more difficult, even occurs the danger of peroxide blast.
Summary of the invention
The existing wall water-cooling coal slurry gasifier of technical problem that the present invention solves is lighted difficult problem when starting, and then the pot destroying process water wall coal slurry gasifier lighted when starting of being easy to of a kind of set-point stove head is provided.
In order to solve the problems of the technologies described above, the technical solution used in the present invention is as follows:
The pot destroying process water wall coal slurry gasifier of set-point stove head, comprises body of heater, radiation waste pot;
Be arranged on the vaporizer in described body of heater, described vaporizer inwall is water cooled wall type structure;
Be arranged on the slag gas outlet in described body of heater;
Be arranged on the import of slag gas, crude synthesis gas outlet, slag bathroom and slag-drip opening in described radiation waste pot;
The slag gas outlet of described body of heater connects the slag gas import of radiation waste pot;
Described body of heater also comprises at least one igniting burner, the inner chamber of described igniting burner and described vaporizer are connected, on described igniting burner, be provided with the nozzle installing port for insertion point fire-fighting head, installation feed nozzle, described inner chamber is that laying fireproof bricks forms or refractory materials is built moulding.
Described igniting burner is two, and it is symmetrical set on the sidewall of described body of heater centered by the axis of described vaporizer.
The igniting burner that also comprises the top that is arranged on described body of heater.
Described igniting burner is connected with described body of heater by flange, and described radiation waste pot is connected with described body of heater by flange.
The inner chamber of described igniting burner comprises combustion chamber and the jet channel being connected with described combustion chamber, and described jet channel is connected with described vaporizer.
Junction between described combustion chamber and described jet channel is reducing, and described reducing is shunk to described jet channel gradually from described combustion chamber, described jet channel internal diameter with described combustion chamber internal diameter than being 0.2-1.0.
Described internal diameter is than being 0.5-1.0.
The furnace wall of described combustion chamber is disposed with the first layer refractory materials, second layer refractory materials and the 3rd layer of refractory materials from the inside to the outside.
Between described vaporizer and the shell of described body of heater, be provided with insulated cabinet, described insulated cabinet is cavity or in insulated cabinet, is filled with lagging material, and described water wall inner side is laid with one deck refractory materials, and described water wall is coil pipe or tubulation.Also comprise the useless pot of convection current, be arranged on crude synthesis gas import and syngas outlet on the useless pot of described convection current, the crude synthesis gas outlet of described radiation waste pot is communicated with the crude synthesis gas import of the useless pot of convection current by telescoping water-cooling pipe connecting.
The present invention is with respect to the beneficial effect of prior art:
The pot destroying process water wall coal slurry gasifier of set-point of the present invention stove head, by the igniting burner with refractory lining is set on the body of heater of vapourizing furnace, during startup, can first to ignition furnace head part, carry out baker, make to light a fire and reach certain temperature in burner and feed intake again, thereby coal water slurry is lighted in moment, by the coal water slurry after lighting, be injected to again in the body of heater of vapourizing furnace, thereby the problem that the vapourizing furnace that has overcome water wall structure feeds intake and is difficult for lighting while starting, make vapourizing furnace light time shorten normal startup, while being a plurality of because of igniting burner simultaneously, after system starts, the operation of can lowering the temperature of igniting burner, thereby the refractory brick in the burner that makes to light a fire extends work-ing life.
Accompanying drawing explanation
Fig. 1 is the structural representation that sidewall of the furnace body of the present invention is symmetrical arranged the radiation pot destroying process water wall coal slurry gasifier of two igniting burners;
Fig. 2 is the structural representation that body of heater of the present invention top arranges the radiation pot destroying process water wall coal slurry gasifier of an igniting burner;
Fig. 3 is that body of heater of the present invention top arranges the structural representation that igniting burner, a sidewall of the furnace body arrange the radiation pot destroying process water wall coal slurry gasifier of two igniting burners;
Fig. 4 is the structural representation for the radiation waste pot of set-point of the present invention stove head and convection current pot destroying process water wall coal slurry gasifier;
Fig. 5 is the enlarged view of body of heater top ignition furnace head part in Fig. 2;
Reference numeral in figure is expressed as follows:
1. body of heater; 2. radiation waste pot; 3. vaporizer; 4. water wall; 5. slag gas outlet; 6. slag gas import; 7. crude synthesis gas outlet; 8. slag bathroom; 9. slag-drip opening; 10. interior side wall; 11. outer side walls; 12. igniting burners; 13. combustion chambers; 14. jet channels; 15. insulated cabinets; 16. refractory brick; The useless pot of 17. convection current; 18. crude synthesis gas imports; 19. syngas outlet; 20.u type tubulation water wall.
Embodiment
Below in conjunction with the drawings and specific embodiments, technical scheme of the present invention and beneficial effect are further described.
The water wall coal slurry gasifier of set-point of the present invention stove head, referring to accompanying drawing 1, it comprises body of heater 1, radiation waste pot 2; Be arranged on the vaporizer 3 in described body of heater 1, described vaporizer 3 inwalls are water wall 4; Be arranged on the slag gas outlet 5 in described body of heater 1; Be arranged on slag gas import 6, crude synthesis gas outlet 7, slag bathroom 8 and slag-drip opening 9 in described radiation waste pot 2; Be arranged on interior side wall 10, the outer side wall 11 of described radiation waste pot 2 inside; The slag gas outlet 5 of described body of heater 1 connects the slag gas import 6 of radiation waste pot 2; Also comprise igniting burner 12, the inner chamber of described igniting burner 12 and vaporizer 3 are connected, on igniting burner 12, be provided with the nozzle installing port of igniting shower nozzle and feed nozzle, the inner chamber of igniting burner 12 can be built by laying bricks or stones and form for refractory brick 16, can be also that refractory materials is built moulding.
Setting for above-mentioned igniting burner 12, igniting burner 12 can be arranged on the sidewall of body of heater 1, igniting burner 12 in this embodiment on sidewall is two, it is centered by the axis of described vaporizer 3, be symmetrical set, can prevent like this from the impact of the next high-temperature material oppose side wall of igniting burner 12 spirts; Igniting burner 12 on body of heater 1 sidewall can be set in addition a plurality ofly, it all, centered by the axis of described vaporizer 3, is symmetrical set.
As the embodiment that can convert, also set-point stove head 12 on sidewall of the furnace body not, and at body of heater 1 set-point, top stove head 12, referring to accompanying drawing 2, accompanying drawing 5, the igniting burner 12 at top is identical with igniting burner 12 structures on sidewall.
The embodiment that can convert as another kind, can also be at sidewall of the furnace body and body of heater top while set-point stove head 12, wherein, the igniting burner 12 arranging on sidewall is two, also can be for a plurality of, it is all centered by the axis of described vaporizer 3, be symmetrical set, referring to accompanying drawing 3, this structure, on the one hand, selectable various ignition mode can be provided, when the igniting burner 12 on sidewall breaks down, can adopt igniting burner 12 igniting at top, on the other hand, can increase the inlet amount of 1 chargings of body of heater, guarantee that vapourizing furnace efficiently moves.
The igniting burner 12 that the sidewall of the furnace body of the pot destroying process water wall coal slurry gasifier of set-point of the present invention stove head and top arrange is all connected to the top of body of heater 1 by flange, for convenience detach and maintenance.
Wherein, the furnace wall of the combustion chamber 13 of igniting burner 12 preferably adopts three layers of structure of refractory, be furnace wall from the inside to the outside successively by the first layer refractory materials, second layer refractory materials and for the third time refractory materials form, the refractoriness of these three layers of refractory materialss is different, the refractoriness of the refractory materials of close combustion chamber 13 1 sides is the highest, the refractoriness of the refractory materials of close burner housing one side is minimum, three layers of ability that structure of refractory can provide stronger anti-flame to corrode, improve the work-ing life of igniting burner 12, can reduce cost simultaneously.
Thereby for make water wall 4 in body of heater 1 better dross formed protective membrane prolongs life, in water wall inner side, be laid with one deck refractory masses.
In order further to reduce the appearance temperature of body of heater 1, between body of heater 1 and vaporizer 3, be provided with insulated cabinet 15, insulated cabinet 15 is generally cavity, or it is heat insulation in insulated cabinet 15, to insert lagging material.
In order to realize the cooling fast of product gas, the pot destroying process water wall coal slurry gasifier of set-point of the present invention stove head also comprises the useless pot 17 of convection current, referring to accompanying drawing 4, the useless pot 17 of described convection current comprises crude synthesis gas import 18 and the syngas outlet 19 being arranged on the useless pot 17 of described convection current, be arranged on the u-shaped tubulation water wall 20 in the useless pot of described convection current, the crude synthesis gas outlet 7 of described radiation waste pot 2 is communicated with the crude synthesis gas import 18 of the useless pot 17 of convection current by telescoping water-cooling pipe connecting.
After the pot destroying process water wall coal slurry gasifier blowing out of set-point of the present invention stove head, restart and need to first carry out baker preheating, and then come into operation.Water wall gasifier finishes to the certain time interval that formally come into operation in baker preheating, because water wall heat radiation is very fast, temperature within this short period of time in vaporizer 3 can decline, carrying out coal water slurry gasification while feeding intake, because temperature is too low, coal water slurry should not be lighted, be increased in the danger of vapourizing furnace peroxide blast, the pot destroying process water wall coal slurry gasifier of a kind of set-point of the present invention stove head can guarantee to finish within the timed interval of formally coming into operation in baker preheating, combustion chamber 13 temperature decline little, thereby the startup warm up time after minimizing blowing out, while avoiding coal water slurry to feed intake, there is the danger of the interior peroxide blast of vaporizer 3.
The working process of the pot destroying process water wall coal slurry gasifier of set-point of the present invention stove head is as follows:
First at the shower nozzle installing port insertion point fire-fighting head of igniting burner 12, igniting burner 12 is carried out to baker, make it reach respectively predetermined oven drying temperature, the temperature in the burner 12 of wherein lighting a fire need to reach between 800 ~ 1550 ℃, preferably 1000 ~ 1100 ℃;
Then, extract ignition burner out, at the shower nozzle installing port of igniting burner 12, pack feed nozzle into, from feed nozzle, coal water slurry and vaporized chemical are sprayed into igniting burner 12, coal water slurry is lighted;
The coal water slurry of being lighted sprays into vaporizer 3 along jet channel 14, and in vaporizer 3 combustion gasification, vapourizing furnace starts;
Coal water slurry and oxygen are sprayed into vaporizer 3 from igniting shower nozzle, and the temperature of controlling vaporizer 3 is 1100 ~ 1500 ℃ and gasifies.
In the above-described embodiment, described vaporized chemical can be selected any gases that are suitable for gasification reaction such as oxygen or air.Described coal water slurry is a kind of fluidised form gasified raw material, and gasified raw material is also applicable to the carbonaceous fuels such as dry pulverized coal, heavy oil.
Although the present invention elaborates it by embodiment; but; those skilled in the art should be understood that any form that does not exceed claim protection domain made on this basis and the variation of details, all belong to invention which is intended to be protected.
Claims (10)
1. the pot destroying process water wall coal slurry gasifier of set-point stove head, comprises body of heater (1), radiation waste pot (2);
Be arranged on the vaporizer (3) in described body of heater (1), described vaporizer (3) inwall is water cooled wall type structure (4);
Be arranged on the slag gas outlet (5) in described body of heater (1);
Be arranged on slag gas import (6), crude synthesis gas outlet (7), slag bathroom (8) and slag-drip opening (9) in described radiation waste pot (2);
Be arranged on described radiation waste pot (2) inner interior side wall (10), outer side wall (11);
The slag gas outlet (5) of described body of heater (1) connects the slag gas import (6) of radiation waste pot (2);
It is characterized in that, described body of heater (1) also comprises at least one igniting burner (12), the inner chamber of described igniting burner (12) and described vaporizer (3) are connected, on described igniting burner (12), be provided with the nozzle installing port for insertion point fire-fighting head, installation feed nozzle, described inner chamber is that laying fireproof bricks forms or refractory materials is built moulding.
2. the pot destroying process water wall coal slurry gasifier of set-point according to claim 1 stove head, it is characterized in that: described igniting burner (12) is two, it is symmetrical set on the sidewall of described body of heater centered by the axis of described vaporizer (3).
3. the pot destroying process water wall coal slurry gasifier of set-point according to claim 2 stove head, is characterized in that: the igniting burner (12) that also comprises the top that is arranged on described body of heater (1).
4. according to the pot destroying process water wall coal slurry gasifier of the arbitrary described set-point stove head of claims 1 to 3, it is characterized in that, described igniting burner (12) is connected with described body of heater (1) by flange, and described radiation waste pot (2) is connected with described body of heater (1) by flange.
5. according to the pot destroying process water wall coal slurry gasifier of the arbitrary described set-point stove head of claim 1 or 4, it is characterized in that, the inner chamber of described igniting burner (12) comprises combustion chamber (13) and the jet channel (14) being connected with described combustion chamber (13), and described jet channel (14) is connected with described vaporizer (3).
6. the pot destroying process water wall coal slurry gasifier of set-point according to claim 5 stove head, it is characterized in that, junction between described combustion chamber (13) and described jet channel (14) is reducing, described reducing is shunk gradually from described combustion chamber (13) to described jet channel (14), and described jet channel (14) internal diameter and described combustion chamber (13) internal diameter are than being 0.2-1.0.
7. the pot destroying process water wall coal slurry gasifier of set-point according to claim 6 stove head, is characterized in that, described internal diameter is than being 0.5-1.0.
8. according to the pot destroying process water wall coal slurry gasifier of the set-point stove head described in claim 5 or 6 or 7, it is characterized in that, the furnace wall of described combustion chamber (13) is disposed with the first layer refractory materials, second layer refractory materials and the 3rd layer of refractory materials from the inside to the outside.
9. according to the pot destroying process water wall coal slurry gasifier of the arbitrary described set-point stove head of claim 1 to 8, it is characterized in that, between described vaporizer (3) and the shell of described body of heater (1), be provided with insulated cabinet (15), described insulated cabinet (15) is for cavity or in insulated cabinet (15), be filled with lagging material, described water wall inner side is laid with one deck refractory materials, and described water wall (4) is coil pipe or tubulation.
10. according to the pot destroying process water wall coal slurry gasifier of the arbitrary described set-point stove head of claim 1 to 9, it is characterized in that, also comprise the useless pot of convection current (17), be arranged on crude synthesis gas import (18) and syngas outlet (19) on the useless pot of described convection current (17), be arranged on the u-shaped tubulation water wall (20) in the useless pot of described convection current, the crude synthesis gas outlet (7) of described radiation waste pot (2) is communicated with the crude synthesis gas import (18) of the useless pot of convection current by telescoping water-cooling pipe connecting.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210293031.1A CN103589460A (en) | 2012-08-16 | 2012-08-16 | Waste heat boiler process water-cooled wall coal water slurry gasification furnace provided with ignition furnace end |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210293031.1A CN103589460A (en) | 2012-08-16 | 2012-08-16 | Waste heat boiler process water-cooled wall coal water slurry gasification furnace provided with ignition furnace end |
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| CN201210293031.1A Pending CN103589460A (en) | 2012-08-16 | 2012-08-16 | Waste heat boiler process water-cooled wall coal water slurry gasification furnace provided with ignition furnace end |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103820160A (en) * | 2014-03-03 | 2014-05-28 | 华东理工大学 | Combustion chamber, coal water slurry gasification furnace with water wall and multiple opposite nozzles, and application of coal water slurry gasification furnace |
| CN106047418A (en) * | 2016-06-02 | 2016-10-26 | 哈尔滨工业大学 | Gasifier device combining water wall with refractory brick wall surfaces |
| CN106753574A (en) * | 2016-12-29 | 2017-05-31 | 上海熠能燃气科技有限公司 | A kind of airflow bed gasification furnace |
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| CN2570634Y (en) * | 2002-08-27 | 2003-09-03 | 东南大学 | Pulp and slurry pre-combustion apparatus |
| CN1923975A (en) * | 2005-09-03 | 2007-03-07 | 未来能源有限公司 | Gasification method and device for producing synthesis gas |
| CN101003755A (en) * | 2006-01-19 | 2007-07-25 | 神华集团有限责任公司 | Gasification stove with multi nozzle, and gasification method |
| CN203021517U (en) * | 2012-08-16 | 2013-06-26 | 任相坤 | Waste heat boiler process water cooled wall coal water slurry gasification furnace with ignition furnace end |
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2012
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103820160A (en) * | 2014-03-03 | 2014-05-28 | 华东理工大学 | Combustion chamber, coal water slurry gasification furnace with water wall and multiple opposite nozzles, and application of coal water slurry gasification furnace |
| CN106047418A (en) * | 2016-06-02 | 2016-10-26 | 哈尔滨工业大学 | Gasifier device combining water wall with refractory brick wall surfaces |
| CN106047418B (en) * | 2016-06-02 | 2019-02-22 | 哈尔滨工业大学 | A kind of water-cooling wall combines the gasifying furnace device of arrangement with refractory brick wall surface |
| CN106753574A (en) * | 2016-12-29 | 2017-05-31 | 上海熠能燃气科技有限公司 | A kind of airflow bed gasification furnace |
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Owner name: REN XIANGKUN Free format text: FORMER OWNER: WANG QING Effective date: 20141115 |
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| C41 | Transfer of patent application or patent right or utility model | ||
| C53 | Correction of patent of invention or patent application | ||
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Inventor after: Ren Xiangkun Inventor before: Wang Qing |
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| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 102208 CHANGPING, BEIJING TO: 100020 CHAOYANG, BEIJING Free format text: CORRECT: INVENTOR; FROM: WANG QING TO: REN XIANGKUN |
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| TA01 | Transfer of patent application right |
Effective date of registration: 20141115 Address after: 100020 2508 Times Building, 8 East Beichen Road, Beijing, Beichen, Chaoyang District Applicant after: Ren Xiangkun Address before: 102208 Huilongguan 36 hospital, Beijing, Changping District 1-102 Applicant before: Wang Qing |
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Application publication date: 20140219 |
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