CN106433698A - Dry quenching coke stove primary dedusting system and hanging screen device thereof - Google Patents
Dry quenching coke stove primary dedusting system and hanging screen device thereof Download PDFInfo
- Publication number
- CN106433698A CN106433698A CN201610851416.3A CN201610851416A CN106433698A CN 106433698 A CN106433698 A CN 106433698A CN 201610851416 A CN201610851416 A CN 201610851416A CN 106433698 A CN106433698 A CN 106433698A
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- hanging panel
- hanging
- dry quenching
- water
- pipe
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B39/00—Cooling or quenching coke
- C10B39/02—Dry cooling outside the oven
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B43/00—Preventing or removing incrustations
- C10B43/02—Removing incrustations
- C10B43/04—Removing incrustations by mechanical means
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- Coke Industry (AREA)
Abstract
The invention provides a dry quenching coke stove primary dedusting system and a hanging screen device thereof, and belongs to the technical field of dry quenching coke stove primary dedusting. The problems that according to an existing dry quenching coke stove primary dust remover, bricks of a retaining wall are likely to fall down, and the retaining wall is likely to collapse are solved. The hanging screen device for the dry quenching coke stove primary dedusting system comprises a hanging screen made of a metal material, a suspension unit and a water supply unit, wherein a cooling water channel is arranged inside the hanging screen, and the two ends of the cooling water channel are provided with a water inlet and a water outlet, the suspension unit is used for suspending the hanging screen, the lower portion of the hanging screen is at least located in a settling chamber of the dry quenching coke stove primary dedusting system, and the water supply unit is communicated with the water inlet and the water outlet of the hanging screen and used for providing cooling water for the hanging screen.
Description
Technical field
The invention belongs to coke dry quenching furnace one-time dedusting technical field, and in particular to a kind of coke dry quenching furnace one-time dedusting and its extension
Screen device.
Background technology
The incandescent coke heat exchange that coke dry quenching furnace is produced with coke oven by the use of noble gases (as nitrogen) as recyclegas, by Jiao
Charcoal temperature reduces with quenching.Obviously, complete to carry a large amount of coke powders in the recyclegas of quenching, its will through disposable dust remover,
Waste heat boiler, secondary filter, circulating fan, heat exchange of heat pipe etc. are rear to be just re-used for quenching.
Wherein, the disposable dust remover of coke dry quenching furnace mainly includes the barricade that is built by laying bricks or stones by A level mullite, completes the circulation of quenching
Gas is stopped by barricade, and the coke powder for wherein carrying completes dedusting because inertia is touched on barricade and is fallen in the ash bucket of lower section.
Obviously, the recyclegas temperature for completing quenching is very high, therefore barricade temperature when coke dry quenching furnace works is also very high；But
When coke dry quenching furnace is checked, keeped in repair, barricade can also be reduced to room temperature, and the change repeatedly of this temperature may cause barricade to ftracture.
Meanwhile, can also cause the fluctuation of wherein air pressure when coke dry quenching furnace adds Jiao every time, discharges of the coke, and then cause barricade pressure periodically
Change, this also result in barricade cracking.And possible initiation of barricade cracking falls brick, cause disposable dust remover ash discharge not smooth or even stifled
Plug, impact production；When serious cracking, barricade possibly even total collapse, dustproof function is lost, causes a large amount of coke powders with circulation
Gas enters waste heat boiler, makes the heavy wear of boiler superheater windward side, produces the major accidents such as booster.
Content of the invention
The present invention solves the problems, such as that the barricade in the disposable dust remover of existing coke dry quenching furnace is susceptible to brick and caves in,
A kind of nothing is provided and falls brick and the coke dry quenching furnace primary dedusting system of problem of caving in and its hanging panel device.
The technical scheme adopted by solution present invention problem is a kind of extension for coke dry quenching furnace primary dedusting system
Screen device, which includes：
The hanging panel being made up of metal material, is internally provided with cooling-water duct, the cooling-water duct two ends be respectively into
The mouth of a river and outlet；
Suspension unit, for hanging the hanging panel, and at least makes the bottom of hanging panel be located at coke dry quenching furnace primary dedusting system
Expansion chamber in；
Water supplying unit, water inlet and the outlet UNICOM with the hanging panel, for providing cooling water to hanging panel.
Preferably, the hanging panel has multiple, and hanging side by side is in the same plane.
It may further be preferable that the hanging panel includes long hanging panel and short hanging panel, and on gravity direction, the chi of the long hanging panel
The very little size more than short hanging panel.
It may further be preferable that in the adjacent hanging panel of any two, one is long hanging panel, and another is short hanging panel.
It may further be preferable that on gravity direction, the size of the short hanging panel and the ratio of the size of long hanging panel 0.5～
0.8∶1.
Preferably, the hanging panel is made up of steel.
It may further be preferable that the hanging panel includes multiple being arranged side by side and by elbow or the seamless steel of bend pipe UNICOM
Pipe, the seamless steel pipe and elbow constitute cooling-water duct；Each seamless steel pipe and elbow or bend pipe are welded by fin
Connection.
Preferably, the water supplying unit includes to distribute header, water inlet pipe, outlet pipe, and the distribution header is by water inlet
Pipe and outlet pipe water inlet and outlet UNICOM respectively with the hanging panel.
It may further be preferable that the water inlet pipe and outlet pipe have the sweep for absorbing deformation.
Preferably, the hanging panel device also includes：Two seal closures of the hanging panel both sides are respectively arranged on, each sealing
Cover one end is connected with the hanging panel, and the other end is used for being connected with the roof of the expansion chamber of coke dry quenching furnace disposable dust remover.
It may further be preferable that the seal closure has the kink for absorbing deformation.
The technical scheme adopted by solution present invention problem is a kind of coke dry quenching furnace primary dedusting system, and which includes：
Expansion chamber, which has air inlet；
Above-mentioned hanging panel device, wherein the air inlet is just to the hanging panel.
Preferably, the suspension unit and water supplying unit be all on the outside of the roof of the expansion chamber, under the hanging panel
Portion is stretched in expansion chamber by the opening on expansion chamber roof.
It may further be preferable that the hanging panel device has seal closure；It is outdoor that the seal closure is located at sedimentation, its one end with
The hanging panel is connected, and the other end is connected with the outside of the roof of expansion chamber.
The hanging panel device of the present invention can play the dustproof function of similar barricade, as its hanging panel is made up of metal, therefore
Can only deform when temperature change, pressure change etc. is run into, but will not ftracture, the phenomenon such as therefore avoid brick, cave in, it is ensured that
The stability of coke dry quenching furnace operation；And, hanging panel is suspended from suspension unit, rather than is directly built by laying bricks or stones, therefore when
When hanging panel is damaged, as long as the hanging panel of damage to be pulled down the hanging panel for more renewing, coke dry quenching furnace primary dedusting system can continue
Normal use.
Description of the drawings
Fig. 1 is the positive structure diagram of the hanging panel in a kind of hanging panel device of embodiments of the invention；
Fig. 2 is a kind of positive structure diagram of hanging panel device of embodiments of the invention；
Fig. 3 is a kind of broken section structural representation of the hanging panel device of embodiments of the invention at expansion chamber roof；
Wherein, reference is：1st, hanging panel；11st, seamless steel pipe；12nd, elbow；13rd, fin；18th, long hanging panel；19th, short extension
Screen；2nd, distribute header；31st, water inlet pipe；32nd, outlet pipe；4th, seal closure；41st, kink；9th, roof；91st, it is open.
Specific embodiment
For making those skilled in the art more fully understand technical scheme, below in conjunction with the accompanying drawings and specific embodiment party
Formula is described in further detail to the present invention.
Embodiment 1：
As shown in Figure 1 to Figure 3, the present embodiment provides a kind of hanging panel device for coke dry quenching furnace primary dedusting system, its
Including：
The hanging panel 1 being made up of metal material, is internally provided with cooling-water duct, and cooling-water duct two ends are respectively water inlet
And outlet；
Suspension unit, for hanging hanging panel 1, and at least makes the bottom of hanging panel 1 be located at coke dry quenching furnace primary dedusting system
In expansion chamber；
Water supplying unit, water inlet and the outlet UNICOM with hanging panel 1, for providing cooling water to hanging panel 1.
Above hanging panel device is used in coke dry quenching furnace primary dedusting system, and as shown in Figure 1 and Figure 2, which includes to be similar to " screen "
Or the hanging panel 1 of " baffle plate ", it (can be the forms such as hook, here is not described in detail, as long as which can that the hanging panel 1 hangs over suspension unit
" hang-up " hanging panel 1) on, and the bottom of at least hanging panel 1 be in the expansion chamber of coke dry quenching furnace primary dedusting system.When
Complete the recyclegas of quenching from air inlet enter expansion chamber when, due to circulation area sudden enlargement (the indoor circulating face of sedimentation
Product is obviously big than air inlet), flow velocity reduces, and makes part coke powder sedimentation；Meanwhile, most of recyclegas stopped by hanging panel 1 and by
1 bottom of hanging panel is flow through, and the coke powder for wherein carrying is settled and fall in ash bucket because effect of inertia is collided with hanging panel 1, completes dedusting.With
When, the cooling-water duct being provided with hanging panel 1 for leading to cooling water, the water inlet of cooling-water duct and outlet respectively with supply water single
Unit is connected；Cooling water can reduce the temperature of hanging panel 1, it is ensured which can use in the expansion chamber of high temperature for a long time.
As hanging panel 1 is made up of metal, therefore which can only be deformed when temperature change, pressure change etc. is run into,
But will not ftracture, the phenomenon such as therefore it also avoid brick, cave in, it is ensured that the stability of coke dry quenching furnace operation；And, hanging panel 1
It is suspended from suspension unit, rather than directly build by laying bricks or stones, therefore when hanging panel 1 is damaged, as long as the hanging panel 1 that will damage
The hanging panel 1 for more renewing is pulled down, coke dry quenching furnace primary dedusting system can continue normal use.
Preferably, hanging panel 1 has multiple, and hanging side by side is in the same plane.
That is, it is preferred that transversely (parallel to hanging panel 1 and direction) perpendicular to gravity sets side by side on suspension unit
Multiple hanging panels 1 are put, the so size of each hanging panel 1, weight is little, is easy to manufacture, installs, changes.Certainly, when mounted,
Also adjacent 1 sidepiece of hanging panel can be welded together, so as to multiple hanging panels 1 are connected.
Preferably, hanging panel includes long hanging panel 18 and short hanging panel 19, and on gravity direction, the size of long hanging panel is more than short hanging panel
Size.It is furthermore preferred that in the adjacent hanging panel 1 of any two, one is long hanging panel 18, and another is short hanging panel 19；Enter one
Step is preferred, and on gravity direction, the ratio of the size of short hanging panel 19 and the size of long hanging panel 18 is 0.5～0.8: 1.
As shown in Fig. 2 hanging panel 1 is preferably according in the vertical, and the difference of (i.e. gravity direction) length is divided into different long hanging panels
18 and short hanging panel 19, due to length difference, therefore 1 downside of multiple hanging panels assumes the structure of " zigzag " on the whole.So, will necessarily
Part recyclegas is had to flow through from the space (spaces between i.e. two long hanging panels 18) of 19 bottom of short hanging panel, so as to destroy hanging panel 1
Whirlpool afterwards is generated, it is to avoid the coke powder for having settled is stirred and flowed out with recyclegas by whirlpool.Wherein, for playing preferable destruction
The effect of whirlpool, therefore long hanging panel 18 and short hanging panel 19 are in the horizontal preferably in the form of " being alternately arranged ", more to be formed
The situation that gas is flow through from the space between two long hanging panels 18.It has been investigated that, on gravity direction, if the chi with long hanging panel 18
Very little is 1, then the size of short hanging panel 19 effect between 0.5～0.8 is preferable.
Preferably, hanging panel 1 is made up of steel.
That is, steel (as carbon steel) can be used as the material of hanging panel 1, because steel good combination property, optional species
Many, advantage of lower cost.Certainly, if using other alloys as hanging panel 1 material, and feasible.
It is furthermore preferred that hanging panel 1 include multiple be arranged side by side and by the seamless steel pipe 11 of elbow 12 or bend pipe UNICOM, seamless
Steel pipe 11 and elbow 12 constitute cooling-water duct；Each seamless steel pipe 11 and elbow 12 or bend pipe are welded to connect by fin 13.
As shown in figure 1, each hanging panel 1 may include multiple seamless steel pipes 11 for linking together by fin 13, seamless steel
Gutron crosses elbow 12 (as one half bend) UNICOM (elbow 12 or bend pipe also can be welded to connect) by fin 13, cold so as to constitute
But aquaporin.Wherein, in each hanging panel 1, all of seamless steel pipe 11 can pass sequentially through 13 UNICOM of elbow, cold so as to form one
But aquaporin；Or, the seamless steel pipe 11 in a hanging panel 1 can also be divided into several groups, per by curved between the seamless steel pipe 11 in group
13 UNICOMs, so as to form multiple cooling-water ducts；Or, the seamless steel pipe 11 between adjacent hanging panel 1 can also pass through elbow 13
Logical, linking together so as to the cooling-water duct in multiple hanging panels 1, (the outlet connection of i.e. one 1 cooling-water duct of hanging panel is another
The water inlet of one 1 cooling-water duct of hanging panel), form a cooling-water duct；Cooling-water duct specifically can be according to cooling needs
Design, here is not described in detail.
Preferably, water supplying unit includes to distribute header 2, water inlet pipe 31, outlet pipe 32, and distribution header 2 passes through water inlet pipe 31
With water inlet and the outlet UNICOM respectively with hanging panel 1 of outlet pipe 32.It is furthermore preferred that water inlet pipe 31 and outlet pipe 32 have being used for
Absorb the sweep of deformation.
That is, can be that hanging panel 1 provides cooling water using distribution header 2, wherein, the cooling water of input distribution header 2
Can be boiler feedwater, may participate in so as to cooling water in the Water, steam circulation of waste heat boiler.Certainly, cooling water is alternatively deaerated feedwater
Deng here is not described in detail.
Hanging panel 1 is to hang, and its water inlet is more difficult with outlet to be directly connected with distribution header 2, therefore can pass through water inlet pipe
31 realize connecting between hanging panel 1 and distribution header 2 with outlet pipe 32.Because hanging panel 1 is in use with temperature difference during maintenance very
Greatly, thus dilatancy can be produced, and the impact due to recyclegas, hanging panel 1 there is also microvibration, therefore, 31 He of water inlet pipe
The pipeline direction of outlet pipe 32 is preferably designed to absorb above deformation or vibration, that is, the bending having for absorbing deformation
Partly (the 180 degree bent pipe fashion for example, shown in Fig. 3).
Above deformation and vibration are absorbed to a certain extent can, it is to avoid device failure.
Preferably, hanging panel device also includes：Two seal closures 4 of 1 both sides of hanging panel are respectively arranged on, each 4 one end of seal closure
It is connected with hanging panel 1, the other end is used for being connected with the roof 9 of the expansion chamber of coke dry quenching furnace disposable dust remover.It is furthermore preferred that the sealing
Cover 4 has the kink 41 for absorbing deformation.
As shown in Figure 2 and Figure 3, seal closure 4 can be set in the both sides of hanging panel 1, seal closure 4 is connected to hanging panel 1 and sedimentation ceiling
Between portion, so as to form the space of relative closure, it is to avoid the indoor recyclegas of sedimentation is between hanging panel 1 and expansion chamber roof 9
It is outdoor that sedimentation is leaked in gap.Wherein, in the seal closure 4 preferably also have kink 41, the effect of the kink 41 with
On sweep be similar to, also can absorb the deformation of hanging panel 1 and vibration, to avoid device failure.
The present embodiment also provides a kind of coke dry quenching furnace primary dedusting system, and which includes：
Expansion chamber, which has air inlet；
Above-mentioned hanging panel device, wherein air inlet are just arranged to hanging panel 1.
The coke dry quenching furnace primary dedusting system is used for the one-time dedusting of coke dry quenching furnace, that replaces the one of existing coke dry quenching furnace
Expansion joint between secondary cleaner unit and disposable dust remover and waste heat boiler.The air inlet of expansion chamber is used for being passed through the circulation for completing quenching
Gas, due to circulation area sudden enlargement (the indoor circulation area of sedimentation is obviously big than air inlet), stream after recyclegas entrance
Prompt drop is low, makes part coke powder sedimentation；Meanwhile, most of recyclegas is stopped and is flow through by 1 bottom of hanging panel by hanging panel 1, is wherein taken
The coke powder of band is collided with hanging panel 1 because of effect of inertia, and sedimentation is fallen in ash bucket, completes dedusting.
Certainly, the expansion chamber can also be provided with its structure such as ash bucket, gas outlet；Its ash bucket can be located at below expansion chamber, and is gone out
QI KOU can then connect waste heat boiler, after the recyclegas of one-time dedusting enters boiler, then sequentially enter secondary filter, follow
Ring blower fan, heat exchange of heat pipe etc., are re-used for quenching afterwards；Wherein, boiler feedwater is alternatively arranged as the cooling water used in hanging panel 1
It is fed in distribution header 2, so that cooling water participates in the Water, steam circulation of waste heat boiler.
Preferably, above suspension unit and water supplying unit are all located at 9 outside of roof of expansion chamber, and 1 bottom of hanging panel is by heavy
Opening 91 on drop ceiling wall 9 is stretched in expansion chamber.
That is, can as shown in Figure 2 and Figure 3, by suspension unit, water supplying unit (distribution header 2, water inlet pipe 31, water outlet
Pipe 32 etc.) be arranged on outside expansion chamber, and on expansion chamber roof 9 arrange opening 91, so as to only have hanging panel 1 bottom pass through with
Upper shed 91 is stretched in expansion chamber.So, water supplying unit etc. is located at outside expansion chamber, can avoid them because of the indoor harsh ring of sedimentation
Border and damage.
Preferably, for the above-mentioned hanging panel 1 with seal closure 4, seal closure 4 is located at sedimentation outdoor, its one end and 1 phase of hanging panel
Even, the other end is connected with 9 outside of roof of expansion chamber.
That is, as shown in Figure 2 and Figure 3, seal closure 4 is preferably also to be located at outside expansion chamber, so as to reduce its damage
Possibility.
It is understood that the embodiment of above principle being intended to be merely illustrative of the present and the exemplary enforcement for adopting
Mode, but the invention is not limited in this.For those skilled in the art, in the essence without departing from the present invention
In the case of god and essence, various modifications and improvement can be made, these modifications and improvement are also considered as protection scope of the present invention.
Claims (14)
1. a kind of hanging panel device for coke dry quenching furnace primary dedusting system, it is characterised in that include：
The hanging panel being made up of metal material, is internally provided with cooling-water duct, and the cooling-water duct two ends are respectively water inlet
And outlet；
Suspension unit, for hanging the hanging panel, and at least makes the bottom of hanging panel be located at the heavy of coke dry quenching furnace primary dedusting system
In drop room；
Water supplying unit, water inlet and the outlet UNICOM with the hanging panel, for providing cooling water to hanging panel.
2. hanging panel device according to claim 1, it is characterised in that
The hanging panel has multiple, and hanging side by side is in the same plane.
3. hanging panel device according to claim 2, it is characterised in that
The hanging panel includes long hanging panel and short hanging panel, and on gravity direction, the size of the long hanging panel is more than the size of short hanging panel.
4. hanging panel device according to claim 2, it is characterised in that
In the adjacent hanging panel of any two, one is long hanging panel, and another is short hanging panel.
5. hanging panel device according to claim 2, it is characterised in that
On gravity direction, the size of the short hanging panel is with the ratio of the size of long hanging panel 0.5～0.8: 1.
6. hanging panel device according to claim 1, it is characterised in that
The hanging panel is made up of steel.
7. hanging panel device according to claim 6, it is characterised in that
The hanging panel includes multiple being arranged side by side and by elbow or the seamless steel pipe of bend pipe UNICOM, the seamless steel pipe and elbow
Constitute cooling-water duct；
Each seamless steel pipe and elbow or bend pipe are welded to connect by fin.
8. hanging panel device according to claim 1, it is characterised in that
The water supplying unit includes to distribute header, water inlet pipe, outlet pipe, and the distribution header is by water inlet pipe and outlet pipe difference
Water inlet and outlet UNICOM with the hanging panel.
9. hanging panel device according to claim 8, it is characterised in that
The water inlet pipe and outlet pipe have the sweep for absorbing deformation.
10. hanging panel device according to claim 1, it is characterised in that also include：
Two seal closures of the hanging panel both sides are respectively arranged on, each seal closure one end is connected with the hanging panel, and the other end is used for
It is connected with the roof of the expansion chamber of coke dry quenching furnace disposable dust remover.
11. hanging panel devices according to claim 10, it is characterised in that
The seal closure has the kink for absorbing deformation.
12. a kind of coke dry quenching furnace primary dedusting systems, it is characterised in that include：
Expansion chamber, which has air inlet；
Hanging panel device in claim 1 to 11 described in any one, wherein the air inlet is just to the hanging panel.
13. coke dry quenching furnace primary dedusting systems according to claim 12, it is characterised in that
The suspension unit and water supplying unit are all on the outside of the roof of the expansion chamber, and the hanging panel bottom is by settling ceiling
Opening on wall is stretched in expansion chamber.
14. coke dry quenching furnace primary dedusting systems according to claim 13, it is characterised in that
The hanging panel device is the hanging panel device of claim 10 or 11；
The seal closure is located at sedimentation outdoor, and its one end is connected with the hanging panel, and the other end is connected with the outside of the roof of expansion chamber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610851416.3A CN106433698B (en) | 2016-09-26 | 2016-09-26 | Dry quenching furnace primary dust removal system and screen hanging device thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610851416.3A CN106433698B (en) | 2016-09-26 | 2016-09-26 | Dry quenching furnace primary dust removal system and screen hanging device thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106433698A true CN106433698A (en) | 2017-02-22 |
| CN106433698B CN106433698B (en) | 2021-12-24 |
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ID=58171182
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610851416.3A Active CN106433698B (en) | 2016-09-26 | 2016-09-26 | Dry quenching furnace primary dust removal system and screen hanging device thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106433698B (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201971784U (en) * | 2010-12-17 | 2011-09-14 | 攀钢集团钢铁钒钛股份有限公司 | Primary dust remover |
| CN206157091U (en) * | 2016-09-26 | 2017-05-10 | 北京华泰焦化工程技术有限公司 | Dust pelletizing system of dry quenching furnace and hanging panel device thereof |
-
2016
- 2016-09-26 CN CN201610851416.3A patent/CN106433698B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201971784U (en) * | 2010-12-17 | 2011-09-14 | 攀钢集团钢铁钒钛股份有限公司 | Primary dust remover |
| CN206157091U (en) * | 2016-09-26 | 2017-05-10 | 北京华泰焦化工程技术有限公司 | Dust pelletizing system of dry quenching furnace and hanging panel device thereof |
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| Publication number | Publication date |
|---|---|
| CN106433698B (en) | 2021-12-24 |
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Address after: Section thirteen economic and Technological Development Zone of Beijing City 31 street 100176 No. two School District No. 15 Building 5 layer 501 Applicant after: HUATAI YONGCHUANG (BEIJING) TECHNOLOGY Co.,Ltd. Address before: 101318, building 14, Rong Hui Garden, B District, Shunyi District Airport Industrial Park, Beijing Applicant before: BEIJING HUATAI COKING ENGINEERING CONSULTING Corp. |
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