CN203432209U - Air separation system - Google Patents
Air separation system Download PDFInfo
- Publication number
- CN203432209U CN203432209U CN201320532818.9U CN201320532818U CN203432209U CN 203432209 U CN203432209 U CN 203432209U CN 201320532818 U CN201320532818 U CN 201320532818U CN 203432209 U CN203432209 U CN 203432209U
- Authority
- CN
- China
- Prior art keywords
- air
- precooling
- compressed gas
- space division
- separation plant
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Landscapes
- Separation By Low-Temperature Treatments (AREA)
Abstract
The utility model provides an air separation system which comprises an air separation device. The air separation device comprises a raw material air compression part, a precooling part, a refrigeration part and a separation part, wherein the raw material air compression part is connected with the precooling part, and the air separation system further comprises an external compression air part and a first control part. The external compression air part is connected with the precooling part. The first control part is connected between the raw material air compression part and the precooling part and is connected between the external compression air part and the precooling part, so that the fact that the raw material air compression part and the precooling part are communicated or the external compression air part and the precooling part are communicated is controlled. Through the air separation system, the electricity energy waste due to the fact that most compressed air needs to be released when the raw material air compression part is used in a starting stage is avoided, and energy consumption in the starting stage is reduced effectively.
Description
Technical field
The utility model belongs to air separation unit technique field, is specifically related to a kind of space division system.
Background technology
Air separation plant is common visual plant metallurgical, chemical industry, and air separation plant is produced oxygen, nitrogen or argon gas for take air as raw material.Before air separation plant is normally produced, need to complete the start-up course of air separation plant, the start-up course of air separation plant comprises cooling device, accumulating liquid and adjusting purity three phases, in start-up course, need the large number quipments in ice chest to be cooled to low temperature from normal temperature, and accumulated the not liquid of small number, regulated the most afterwards purity.In this three phases of start-up course, air separation plant only needs power consumption source does not have product output.
In the cooling device stage that starts early stage at air separation plant, because rectifying operating mode is not yet set up, main condenser evaporimeter is not also worked, and the mach a large amount of air of raw material pneumatics has only utilized the fraction for turbine expander refrigeration; In addition, in the accumulating liquid stage, there is part air to be liquefied, equally only need the mach a large amount of airborne fraction of raw material pneumatics.Before main condenser evaporimeter starts preferably work, the gas flow that air separation plant needs during with normal production required gas flow compare much smaller.
Yet, because raw material air compressor machine is generally centrifugal compressor, can not the processing tolerance of raw material air compressor machine be closed very littlely, otherwise there will be surging condition, therefore, the processing tolerance of raw material air compressor machine need to remain on higher level, but the processing tolerance of raw material air compressor machine only has very fraction to be utilized, and major part need to be diffused, therefore, caused in the start-up course of air separation plant, had all the time a large number of processing air not to be utilized, caused very large energy waste.
Utility model content
The purpose of this utility model be for solve existing air separation plant startup stage there is the problem of larger energy waste.
The technical scheme that solution the utility model technical problem adopts is a kind of space division system, comprises air separation plant, and described air separation plant comprises raw air compression section, precooling part, refrigerating part and separating part; Wherein, described raw air compression section is partly connected with described precooling,
Described space division system also comprises external Compressed Gas part and the first control section;
Described external Compressed Gas part is partly connected with described precooling;
Described the first control section is connected between described raw air compression section and described precooling part and is connected between described external Compressed Gas part and described precooling part, to control, is communicated with or described external Compressed Gas partly with between described precooling part is communicated with between described raw air compression section and described precooling part.
Preferably, described space division system comprises M air separation plant and N external Compressed Gas part, and wherein M and N are positive integer;
Wherein, the precooling in described each air separation plant part all with one or more being connected in the individual external Compressed Gas part of N.
Preferably, described the first control section comprises the first control subelement, described first controls subelement is connected between N external Compressed Gas part and the precooling part of M air separation plant, to control the precooling part of air separation plant and one or more being connected in the individual external Compressed Gas part of N.
The external Compressed Gas that described external Compressed Gas partly provides is compressed air or compressed nitrogen.Air separation plant startup stage, can also can maintain with other Compressed Gas the normal startup of equipment with compressed air, conventionally nitrogen pipe network and the air pipe network in factory is UNICOM, when nitrogen use level is less, using unnecessary compressed nitrogen is a kind of comparatively economic way as the external Compressed Gas of air separation plant.
Preferably, described external Compressed Gas partly comprises one or more in gas compressor, air compression station, compressed air storage tank or raw air compressor.
Preferably, described gas compressor comprises one or more in piston type non-lubricated air compressor, screw air compressor or centrifugal air compressor.Wherein, the gas flow that centrifugal air compressor provides is larger, and economic and practical is high; Piston type air compressor need to adopt the type of oil-free lubrication, with avoid with space division system in oxygen interact, improved security.
Preferably, the gas flow that described external Compressed Gas part provides is less than the gas flow that described raw air compression section provides.
Preferably, described the first control section comprises pipeline and valve member;
Described raw air compressor is partly connected with described precooling with valve member by pipeline, and described external Compressed Gas part is partly connected with described precooling with valve member by pipeline.
Preferably, described the first control section is connected to the liquid level sensor arranging in described separating part, with the connection between being partly communicated with according to the liquid level information realization raw air compression section of liquid level sensor and described precooling, switches; And/or,
Described the first control section is connected to clock system, to realize raw air compression section and the described precooling connection between being partly communicated with according to the temporal information of clock system, switches.
Preferably, described space division system also comprises Q product compression section, and wherein Q is positive integer;
Wherein, the separating part in each air separation plant all with one or more being connected in Q product compression section;
Described space division system also comprises the second control section, and described the second control section is connected between the separating part and Q product compression section of M air separation plant, to control the separating part of air separation plant and one or more being connected in Q product compression section.
Use space division system of the present utility model, can startup stage with external Compressed Gas, partly provide compressed air, in normal work stage, use raw air compression unit to assign to provide compressed air, thereby the gas flow startup stage of partly providing applicable by external Compressed Gas, the gas flow providing while having avoided using raw air compression section that compressed air is provided need to discharge most of compressed air too greatly, with respect to existing air separation plant, solve existing air separation plant startup stage because turning down the waste of energy causing, effectively reduce the energy resource consumption in the device start stage of air separation plant.
Accompanying drawing explanation
Fig. 1 is the structural representation of a kind of space division system in the utility model embodiment;
Fig. 2 is the module diagram of the space division system in the utility model embodiment;
Fig. 3 is the structural representation of another kind of space division system in the utility model embodiment;
Fig. 4 is the structural representation of another space division system in the utility model embodiment.
The specific embodiment
For making those skilled in the art understand better the technical solution of the utility model, below in conjunction with the drawings and specific embodiments, the utility model is described in further detail.
The utility model embodiment provides a kind of space division system, comprises air separation plant, and described air separation plant comprises raw air compression section, precooling part, refrigerating part and separating part; Wherein, described raw air compression section is partly connected with described precooling, described precooling part is connected with described refrigerating part, described precooling part is also connected with described separating part, described refrigerating part is connected with described separating part, and described space division system also comprises external Compressed Gas part and the first control section; Described external Compressed Gas part is partly connected with described precooling; Described the first control section is connected between described raw air compression section and described precooling part and is connected between described external Compressed Gas part and described precooling part, to control, is communicated with or described external Compressed Gas partly with between described precooling part is communicated with between described raw air compression section and described precooling part.
Below in conjunction with accompanying drawing and concrete example, describe.
The structural representation of a kind of space division system providing for the utility model embodiment as shown in Figure 1.
Space division system comprises air separation plant 100, external Compressed Gas part 200 and the first control section 300.Wherein, air separation plant 100 comprises raw air compression section 110, precooling part 120, refrigerating part 130 and separating part 140.Wherein, described the first control section 300 is connected between described raw air compression section 110 and described precooling part 120 and is connected between described external Compressed Gas part 200 and described precooling part 120, with control between described raw air compression section 110 and described precooling part 120, be communicated with or described external Compressed Gas part 200 and described precooling part 120 between be communicated with.
Particularly, air separation plant 100 startup stage, the first control section 300 makes the precooling part 120 of air separation plant 100 be communicated with external Compressed Gas part 200, in the normal work stage of air separation plant 100, the first control section 300 makes the precooling part 120 of air separation plant 100 be communicated with raw air compression section 110.
General metallurgy or chemical enterprise great majority are all used two above air separation plants, or except air separation plant, also has large-scale air compressor unit centralizedly supply compressed air, and generally all possesses air compressor, and the pressure of the pressure of other air compressor and the raw material air compressor machine in air separation plant is basically identical, therefore, by space division system of the present utility model, only need the design repacking of fraction, between air compressor and air separation plant, increase for being communicated with the first control section of control, it is simple in structure, it is convenient to realize, and without large-scale redevelopment just can solve air separation plant startup stage because turning down the waste of energy causing, effectively reduce the energy resource consumption in the device start stage of air separation plant.
In the utility model embodiment, the gas flow that external Compressed Gas part 200 provides is less than the gas flow that described raw air compression section 110 provides.And the external Compressed Gas that external Compressed Gas part 200 provides can be compressed air or compressed nitrogen.
External Compressed Gas part 200 can be gas compressor, air compression station or compressed air storage tank.Gas compressor comprises piston type non-lubricated air compressor, screw air compressor or centrifugal air compressor.The external Compressed Gas part 200 realizing by these equipment can provide the Compressed Gas of less gas flow, thereby the gas flow startup stage of meeting, the gas flow providing while having avoided using raw air compression section 110 that compressed air is provided need to discharge the waste of energy that most of compressed air causes too greatly.
In addition, external Compressed Gas part 200 is except realizing by the way, also by the raw air compression section 110 of other air separation plants 100, realize, that is to say, an air separation plant 100 startup stage, when the gas flow of the air separation plant 100 in other or several uses has surplus, can by other or several with in the raw air compression section 110 of air separation plant 100 realize external Compressed Gas part 200.
In the utility model embodiment, described the first control section 300 comprises pipeline and valve member; Described raw air compressor is partly connected with described precooling with valve member by pipeline, and described external Compressed Gas part is partly connected with described precooling with valve member by pipeline.By valve member can control between precooling part 120 and raw air compression section 110 be communicated with closing and opening, also can control between precooling part 120 and external Compressed Gas part 200 be communicated with closing and opening.
In addition, the first control section 300 can be connected to the liquid level sensor (not shown) arranging in described separating part; And/or the first control section 300 is connected to clock system.The end startup stage that the temporal information that the first control section 300 can provide by liquid level signal and/or the clock system of liquid level sensor judging, thereby close being communicated with between corresponding raw air compression section 110 and precooling part 120, and open being communicated with between corresponding external Compressed Gas part 200 and precooling part 120, otherwise or.Clock system is special setting in can space division system, also can utilize other clock systems of space division system outside.
Provide a concrete example below, as shown in Figure 2, the module diagram of the space division system providing for the utility model embodiment.As shown in Figure 2, this space division system comprises external pneumatic filter 1, extraneous gas gas compressor 2, raw material filter 3, raw air compressor 4, sends valve 5, diffuses end 6, air cooling compressor 7, turbo-expander 8, return tube 9, heat exchanger 10 and condenser/evaporator 11.Wherein, external Compressed Gas partly comprises the extraneous gas gas compressor 2 that is connected with external pneumatic filter 1.Raw air compression section comprises raw material filter 3, raw air compressor 4, sends valve 5 and diffuses end 6.The arrival end of raw air compressor 4 connects raw material filter 3 by pipeline, and the port of export is by pipeline and send valve 5 and diffuse end and 6 be connected.Precooling partly comprises the air cooling compressor 7 with molecular sieve purifier; Refrigerating part comprises turbo-expander 8 and heat exchanger 10.Separating part comprises condenser/evaporator 11 and return tube 9.Extraneous gas gas compressor 2 is all connected in the arrival end with the air cooling compressor 7 of molecular sieve purifier by pipeline, valve member and other necessary Common Component (not shown) with raw air compressor 4, the port of export of air cooling compressor 7 divides two-way, the pipeline of leading up to is connected with turbo-expander 8, the pipeline of separately leading up to connects condenser/evaporator 11 through heat exchanger 10, turbo-expander 8 passes heat exchanger 10 by pipeline and is connected in condenser/evaporator 11, the discharging opening of condenser/evaporator 11 is connected with return tube 9, and return tube 9 is through heat exchanger 10.
In existing air separation plant, do not possess external pneumatic filter 1 and extraneous gas gas compressor 2, in startup and the maintenance stage of air separation plant, still by raw air compressor 4, provide compressed air, cooling through air cooling compressor 7 from the compressed air fraction of raw air compressor 4, molecular sieve purifier absorption, divide again two-way to enter heat exchanger 10, by refrigeration, enter condenser/evaporator 11, and most of raw material compressed air, due to not work of condenser/evaporator in start-up course 11, rectifying operating mode is not yet set up, in order to maintain system pressure, unnecessary compressed air directly 6 dissipates diffusing end after sending valve 5, the gas flow of about 20-30% while causing space division system only to use with respect to normal operation in the cooling device stage (continuing about 10～20 hours), the gas flow of about 30-40% when the most of the time in hydrops stage (continuing about 10～20 hours) has only been used with respect to normal operation, a large amount of electric energy are wasted, equally for existing air separation plant, the maintenance stage is also because desired gas amount is compared with little and cause a large amount of energy wastes.And in the utility model embodiment, by the setting of external pneumatic filter 1 and extraneous gas gas compressor 2, air separation plant startup stage or the maintenance stage in, can provide air separation plant required compressed air by extraneous gas gas compressor 2, because extraneous gas gas compressor 2 can provide suitable gas flow, thereby avoided a large amount of electric energy to be wasted.
The structural representation of the another kind of space division system providing for the utility model embodiment as shown in Figure 3.
Space division system comprises M air separation plant 100, and N external Compressed Gas part 200, and wherein M and N are positive integer, and in M and N, at least one is more than or equal to 2.Wherein, in the precooling part in M air separation plant, each is all connected with each in N external Compressed Gas part.The first control section 300 comprises the first control subelement 310, described first controls subelement 310 is connected between N external Compressed Gas part 200 and the precooling part 120 of M air separation plant 100, to control the precooling part 120 of air separation plant 100 and one or more being connected in the individual external Compressed Gas part of N.
In addition, in this example, with each precooling part, be all partly connected with each external Compressed Gas.In addition, the precooling in air separation plant part also can with one or more being connected in N external Compressed Gas part.
For example, at M, be that 2, N is that in 2 situation, space division system comprises 2 air separation plants 100 and 2 external Compressed Gas parts 200.
With one of them air separation plant 100, all there is annexation in the precooling part 120 of this air separation plant 100 and 2 external Compressed Gas parts 200, when 200 gas flows that can provide of 2 external Compressed Gas parts are respectively 100 normal operation of this air separation plant 20% and 30% of desired gas amount.Therefore, this air separation plant 100 startup stage in the cooling device stage, when this stage, required gas flow was normal operation, the external Compressed Gas part 200 that the precooling part 120 of this air separation plant 100 is 20% with the gas flow providing is provided 20%, the first control subelement 310 of desired gas amount; This air separation plant 100 startup stage in the accumulating liquid stage, when this stage, required gas flow was normal operation, the external Compressed Gas part 200 that the precooling part 120 of this air separation plant 100 is 30% with the gas flow providing is provided 30%, the first control subelement 310 of desired gas amount.
In addition, when subsystem comprises a plurality of air separation plants 100 and a plurality of external Compressed Gas part 200, can, according at air separation plant 100 required gas flow and gas flow that can provide of each external Compressed Gas part 200 when different phase is moved, by the first control module, one or more external Compressed Gas part 200 parallel connections be communicated to this air separation plant 100.
The structural representation of the another kind of space division system providing for the utility model embodiment as shown in Figure 4.On the basis of the space division system shown in Fig. 3, space division system also comprises Q product compression section 400, and wherein Q is positive integer.Wherein, each in the separating part 140 in M air separation plant 100 is all connected with each in Q product compression section 400.Space division system also comprises the second control section 500, described the second control section 500 is connected between the separating part 140 and Q product compression section 400 of each air separation plant 100, to control the separating part 140 of air separation plant 100 and one or more being connected in Q product compression section 400.Wherein, product compression section 400 product compressor preferably.
In addition, in this example, take each separating part is all connected with each product compression section as example and is illustrated.In addition, the separating part in air separation plant also can with one or more being connected in Q product compression section.
The space division system providing by the utility model embodiment, when the output of some air separation plant 100 is lower, the product that can use 400 pairs of a plurality of air separation plants 100 of a product compression section to produce compresses, or when the power Incomplete matching of air separation plant 100 and product compression section 400, the product that a plurality of air separation plants 100 are produced is concentrated and is processed by one or more product compression sections 400, thereby realize the power optimized configuration of the cooperating between distinct device, reduced the consumption of the energy.
Be understandable that, above embodiment is only used to principle of the present utility model is described and the illustrative embodiments that adopts, yet the utility model is not limited to this.For those skilled in the art, in the situation that not departing from spirit of the present utility model and essence, can make various modification and improvement, these modification and improvement are also considered as protection domain of the present utility model.
Claims (10)
1. a space division system, comprises air separation plant, and described air separation plant comprises raw air compression section, precooling part, refrigerating part and separating part; Wherein, described raw air compression section is partly connected with described precooling, it is characterized in that,
Described space division system also comprises external Compressed Gas part and the first control section;
Described external Compressed Gas part is partly connected with described precooling;
Described the first control section is connected between described raw air compression section and described precooling part and is connected between described external Compressed Gas part and described precooling part, to control, is communicated with or described external Compressed Gas partly with between described precooling part is communicated with between described raw air compression section and described precooling part.
2. space division system according to claim 1, is characterized in that, described space division system comprises M air separation plant and N external Compressed Gas part, and wherein M and N are positive integer;
Wherein, the precooling in described each air separation plant part all with one or more being connected in the individual external Compressed Gas part of N.
3. space division system according to claim 2, it is characterized in that, described the first control section comprises the first control subelement, described first controls subelement is connected between N external Compressed Gas part and the precooling part of M air separation plant, to control the precooling part of air separation plant and one or more being connected in the individual external Compressed Gas part of N.
4. space division system according to claim 1, is characterized in that, the external Compressed Gas that described external Compressed Gas partly provides is compressed air or compressed nitrogen.
5. space division system according to claim 1, is characterized in that, described external Compressed Gas partly comprises one or more in gas compressor, air compression station, compressed air storage tank or raw air compressor.
6. space division system according to claim 5, is characterized in that, described gas compressor comprises one or more in piston type non-lubricated air compressor, screw air compressor or centrifugal air compressor.
7. space division system according to claim 1, is characterized in that, the gas flow that described external Compressed Gas part provides is less than the gas flow that described raw air compression section provides.
8. space division system according to claim 1, is characterized in that, described the first control section comprises pipeline and valve member;
Described raw air compressor is partly connected with described precooling with valve member by pipeline, and described external Compressed Gas part is partly connected with described precooling with valve member by pipeline.
9. space division system according to claim 8, is characterized in that,
Described the first control section is connected to the liquid level sensor arranging in described separating part, with the connection between being partly communicated with according to the liquid level information realization raw air compression section of liquid level sensor and described precooling, switches; And/or,
Described the first control section is connected to clock system, to realize raw air compression section and the described precooling connection between being partly communicated with according to the temporal information of clock system, switches.
10. space division system according to claim 2, is characterized in that, described space division system also comprises Q product compression section, and wherein Q is positive integer;
Wherein, the separating part in each air separation plant all with one or more being connected in Q product compression section;
Described space division system also comprises the second control section, and described the second control section is connected between the separating part and Q product compression section of M air separation plant, to control the separating part of air separation plant and one or more being connected in Q product compression section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320532818.9U CN203432209U (en) | 2013-08-29 | 2013-08-29 | Air separation system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320532818.9U CN203432209U (en) | 2013-08-29 | 2013-08-29 | Air separation system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203432209U true CN203432209U (en) | 2014-02-12 |
Family
ID=50061243
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320532818.9U Expired - Fee Related CN203432209U (en) | 2013-08-29 | 2013-08-29 | Air separation system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203432209U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111947395A (en) * | 2020-06-30 | 2020-11-17 | 日照钢铁控股集团有限公司 | Large-scale empty centrifugal air compressor machine system of using that divides |
| CN113623942A (en) * | 2021-08-11 | 2021-11-09 | 乔治洛德方法研究和开发液化空气有限公司 | Air separation unit suitable for retrofitting and method for retrofitting the air separation unit |
-
2013
- 2013-08-29 CN CN201320532818.9U patent/CN203432209U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111947395A (en) * | 2020-06-30 | 2020-11-17 | 日照钢铁控股集团有限公司 | Large-scale empty centrifugal air compressor machine system of using that divides |
| CN113623942A (en) * | 2021-08-11 | 2021-11-09 | 乔治洛德方法研究和开发液化空气有限公司 | Air separation unit suitable for retrofitting and method for retrofitting the air separation unit |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN204254921U (en) | The low-temperature cold water unit structure of single machine two-stage | |
| US20200191445A1 (en) | A multistage wave rotor refrigerator | |
| CN102200370A (en) | Expansion combustible gas liquefaction device and flow | |
| CN203432209U (en) | Air separation system | |
| CN205478235U (en) | Reciprocating compressor tolerance governing system | |
| US20170350649A1 (en) | Liquefied gas cooling apparatus | |
| CN103335440B (en) | Secondary throttling middle complete cooling double-working-condition refrigeration system | |
| CN107311114B (en) | Energy-saving environment-friendly membrane oxygen-enriched preparation system and method | |
| CN105443402A (en) | Centrifugal ammonia compressor unit with dual-cylinder compression three-section air inlet manner | |
| CN203837412U (en) | Air separation production diffused oxygen recycling device | |
| CN2916524Y (en) | Large-sized air-cooled heat pump | |
| CN203454447U (en) | Intermediate inadequacy cooling double operating conditions refrigeration system in secondary throttling | |
| CN103256081A (en) | Energy comprehensive utilization method based on supercritical air | |
| CN202547171U (en) | Refrigeration system | |
| CN203349432U (en) | Energy efficiency control equipment of data center air conditioner | |
| CN202267261U (en) | Vortex frequency conversion parallel connection condensing unit | |
| CN103322718B (en) | Two-stage-throttling incomplete-intercooling double-duty refrigerating system | |
| CN103557675A (en) | Cryogenic distillation liquidation system and method for synthesis ammonia chemical tail gas | |
| CN203731092U (en) | Device for pressurizing raw natural gas by using natural gas pipeline network pressure energy | |
| CN203628273U (en) | Air separation low-pressure nitrogen interconnection device | |
| CN103062626A (en) | Intelligent dispatching device for local pneumatic pipe networks | |
| CN203892160U (en) | Process device for making up shortage of inflation quantity of air compressors in summer | |
| CN209605479U (en) | Pressure rectifying column reduces space division power consumption device in a kind of use | |
| CN204358989U (en) | A kind of plural parallel stage formula single-stage refrigerating system and plural parallel stage formula cascade refrigeration system | |
| CN202432762U (en) | Energy self-balancing central air-conditioning system with full-liquid turbine device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20220704 Address after: 3007, Hengqin international financial center building, No. 58, Huajin street, Hengqin new area, Zhuhai, Guangdong 519031 Patentee after: New founder holdings development Co.,Ltd. Patentee after: SUZHOU SUXIN SPECIAL STEEL Co.,Ltd. Patentee after: JIANGSU SUZHOU STEEL GROUP Co.,Ltd. Address before: 100871, Beijing, Haidian District, Cheng Fu Road, No. 298, Zhongguancun Fangzheng building, 5 floor Patentee before: PEKING UNIVERSITY FOUNDER GROUP Co.,Ltd. Patentee before: SUZHOU SUXIN SPECIAL STEEL Co.,Ltd. Patentee before: JIANGSU SUZHOU STEEL GROUP Co.,Ltd. |
|
| TR01 | Transfer of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140212 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |