CN101813422A - Waste heat recovery system of petrochemical heating furnace - Google Patents
Waste heat recovery system of petrochemical heating furnace Download PDFInfo
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- CN101813422A CN101813422A CN200910077777A CN200910077777A CN101813422A CN 101813422 A CN101813422 A CN 101813422A CN 200910077777 A CN200910077777 A CN 200910077777A CN 200910077777 A CN200910077777 A CN 200910077777A CN 101813422 A CN101813422 A CN 101813422A
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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
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
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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
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
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Abstract
The invention relates to a waste heat recovery system of a petrochemical heating furnace and belongs to the technical field of petrochemistry. The device comprises a high-temperature section air preheater, a low-temperature section air preheater, a blower, a draught fan arranged between the high-temperature section air preheater and the low-temperature section air preheater, two bypass air ducts, a bypass flue, a gate valve and two baffle plates, wherein one bypass air duct, the bypass flue, the gate valve and one baffle plate are arranged in a low-temperature section; and one bypass air duct and one baffle plate are arranged in the high-temperature section. The system improves the heating efficiency of the heating furnace, makes the draught fan operate at a temperature above a dew point all the time and prevents the impeller of the draught fan from low-temperature corrosion. In addition, when having serious wind leakage or blockage due to low temperature fume corrosion, the low-temperature section air preheater can be cut off manually while the heating furnace still operates with 90 percent efficiency, so the normal operation of the heating furnace and the high-temperature section air preheater is not affected and the low-temperature corrosion of the high-temperature section is avoided.
Description
Technical field
The invention belongs to petrochemical industry, be specifically related to a kind of waste heat recovery system of petrochemical heating furnace.
Background technology
In petrochemical plant, for the thermal efficiency that improves heating furnace need be provided with flue gas waste heat recovery system usually.In flue gas waste heat recovery system, generally adopt air preheater to realize the heat exchange of hot flue gas and cold air, thereby the exhaust gas temperature of reduction heating furnace is to improve the thermal efficiency.Air preheater has hot oil type, swinging, steel pipe type, glass tubular type, heat pipe-type, board-like etc.Air preheaters such as heat pipe preheater and tubular type and swinging compare have that volume is little, light weight, efficient advantages of higher, begin to be widely applied the domestic petroleum chemical field seventies in 20th century, and obtain rapidly promoting.
Heat pipe is two sections sealings, and inside vacuumizes and be filled with the pipe of working medium.By the evaporation of working medium and condensation the heat of flue gas is delivered to air.Mainly be divided into two kinds of gravity type heat pipe and capillary force formula heat pipes by condensate liquid backflow principle.The heat pipe preheater of petrochemical heating furnace use at present nearly all is a gravity type heat pipe, and typical residual neat recovering system is arranged as shown in Figure 1.
Rise the eighties in 20th century, and along with the exploitation and the application of full welded plate formula heat exchanger technology, the plate air preheater that is used for gas-gas heat exchange has also obtained promotion and application.Domestic being mainly used at present on the clean process units of fuel ratios such as hydrogen manufacturing, synthetic ammonia.Plate air preheater adopts corrugated cardboard sheet as heat transfer element, substitutes traditional pipe and adopting heat pipes for heat transfer element.After adopting special welding procedure that the plate of some is welded into a plate bundle along seal groove, again with several plate bundle assembly weldings and assemble the all-in-one-piece plate type preheater.
In the waste heat recovery system of petrochemical heating furnace, air preheater is the most general with heat pipe-type, and it is generally steel-water heat pipe or naphthalene pipe.Be subjected to working substance steam to press and decompose the restriction of coking, it uses flue-gas temperature can not be too high, decomposes and loses efficacy otherwise can produce on-condensible gas or hot working fluid in the heat pipe.In addition, the flue gas dew point corrosion can make heat pipe leak and entirely ineffective, so-called dew point corrosion is meant at a lower temperature, water vapour in the flue gas is condensed into water, sulfur oxide in the flue gas is water-soluble to be become dilute sulfuric acid and produces corrosion, when heat pipe is subjected to dew point corrosion and when boring a hole, the vacuum in the heat pipe is destroyed and is lost heat transmission function.Therefore, heat-pipe air preheater has certain scope of application, and high temperature limit depends on the used working medium of heat pipe, and low temperature limitation depends on the dew-point temperature of flue gas.Characteristics that plate air preheater is little with its floor space in recent years, pressure drop is little and being applied.The plate air preheater heat transfer element is a corrugated cardboard sheet, and its material can be selected stainless steel, titanium alloy, nickel alloy and copper according to the difference of serviceability temperature, corrosion property.Plate air preheater does not have the restriction of high flue-gas temperature, but because the gap between the plate is less, easy dust stratification under the inadequate situation of burning.Hermetically-sealed construction between the plate has determined that it can not single replacing as heat pipe preheater, changes and can only put in order the group plate.Waste heat recovery system of petrochemical heating furnace is provided with the one-part form air preheater usually, the problem of its existence is: just can only integral body excise with maintain and replace from residual neat recovering system in case dew point corrosion takes place in air preheater inner cryogenic district, heating furnace will change the gravity-flow ventilation mode of operation into, like this, heating furnace all will be operated under poor efficiency in the process of whole preheater maintain and replace, and this obviously is to consume energy very much and uneconomic.
Summary of the invention
The objective of the invention is to solve a difficult problem that exists in the above-mentioned prior art, a kind of two-part air preheater is provided, just preheater is divided into high temperature section and low-temperature zone two parts.According to different design conditions, under the design condition of correspondence, select the air preheater adapt, bring into play the sharpest edges of each air preheater.The flexibility of protection equipment and increase operation when improving thermal efficiency of heating furnace.
The present invention is achieved by the following technical solutions:
A kind of waste heat recovery system of petrochemical heating furnace comprises air preheater, air-introduced machine, pressure fan, slide valve, bypass air channel barrier, sealing baffle, by-pass flue baffle plate.
In order to adapt to different operating modes, described air preheater comprises high temperature section air preheater and low-temperature zone air preheater.Described high temperature section air preheater and low-temperature zone air preheater can adopt any two air preheater combinations.Specifically, described high temperature section air preheater exhanst gas outlet temperature is the 160-170 degree, can adopt tubular type or heat pipe-type or plate air preheater; Described low-temperature zone air preheater exhanst gas outlet temperature is for being equal to or less than 100 degree, the sulfur content of exhanst gas outlet temperature and fuel system is closely related, for avoiding taking place low-temperature dew point corrosion, the minimum tube wall temperature of the high more corresponding heat-transfer surface of sulfur content is also corresponding high more, and promptly the exhanst gas outlet temperature is high more.If fuel system H
2S content＜20ppm, the exhanst gas outlet temperature can be 100 ℃; If H
2S content＜10ppm, the exhanst gas outlet temperature can be 90 ℃.Therefore, decide on the order of severity of dew point corrosion, the low-temperature zone air preheater can adopt board-like or cast iron plate tubular type or glass tubular type or enamel tubular type.
Described air-introduced machine is arranged between described high temperature section air preheater and the low-temperature zone air preheater, air-introduced machine is remained under the above temperature of dew point for a long time turn round, and then guarantee the unlikely generation cold end corrosion of its impeller.
Fume side and air side at described low-temperature zone air preheater are provided with slide valve, when taking place, the flue gas low-temperature corrosion cause the low-temperature zone air preheater seriously to leak out or when serious obstruction takes place, can manually cut off the low-temperature zone air preheater and carry out water flushing deashing or change heat-transfer surface, and heating furnace still can turn round under 90% efficient.
Fume side at described low-temperature zone air preheater is provided with the low-temperature zone by-pass flue, described low-temperature zone by-pass flue is provided with slide valve, so that after the low-temperature zone air preheater is cut off, can manually opens the low-temperature zone by-pass flue and do not influence the operate as normal of heating furnace and high temperature section air preheater; Air side at described low-temperature zone air preheater is provided with low-temperature zone bypass air channel, described low-temperature zone bypass air channel is provided with the bypass air channel barrier, like this, after the low-temperature zone air preheater is cut off, can be with portion of air carrying-off from the low-temperature zone bypass air channel, reduce heat absorption, improve the heat-transfer surface temperature, and then avoided the cold end corrosion of high temperature section air preheater.In addition, in described low-temperature zone air preheater, be provided with high pressure water washing and drainage equipment, because the low-temperature zone air preheater is when underload or winter operation, flue gas meeting dewfall, the cigarette ash that is amassed after the dewfall is clammy, unlike the long-pending dry ash of high temperature section, " from the deashing " ability of the reliable high speed flue gas of dry ash or soot blower is set purges, remove, and clammy ash can only be used high pressure water washing.In the specific operation process, by the manhole door of fume side, the artificial high pressure water washing that uses when the needs deashing.Drainage equipment is provided with condensate drain by the fume side low dot location at air preheater, makes sewage enter underground sewage network.
Air side at described high temperature section air preheater is provided with slide valve, when the heating furnace operation, when residual neat recovering system overhauls separately, from security standpoint, uses this slide valve residual neat recovering system is separated fully with heating furnace.For can isolated operation at severe winter the high temperature section air preheater, air side at described high temperature section air preheater is provided with high temperature section bypass air channel, described high temperature section bypass air channel is provided with the bypass air channel barrier, like this, can be with portion of air from high temperature section bypass air channel carrying-off, reduce heat absorption, improve the heat-transfer surface temperature, avoided the cold end corrosion of high temperature section air preheater.
Be exported to chimney from the heating furnace convection cell by-pass flue is set, and on described by-pass flue, the by-pass flue baffle plate is set, when residual neat recovering system breaks down, can manually cut off residual neat recovering system like this, guarantee that heating furnace normally moves; On the exhaust gases passes between outlet of heating furnace convection cell and the described air preheater, sealing baffle is set, purpose is when the residual neat recovering system fault, open this bypass, the assurance heating furnace still can be operated under the gravity-flow ventilation condition, and the unlikely package unit that causes is stopped transport, when air preheating system breaks down stoppage in transit maintenance separately, also be used for the heating furnace of air preheating system and operation is separated, simultaneously to guarantee maintainer's safety.
In order to guarantee the heat exchange effect of described two-part air preheater, insulation so just can be avoided the narrower and small passage of insulated lining chip blocking plate regenerative air heater outside all flues after descending console mode flue all adopted.
Compared with prior art, the invention has the beneficial effects as follows: not only improve thermal efficiency of heating furnace by the two-part air preheater is set, and occur when unusual in the fuel gas system of heating furnace, for avoiding producing dew point corrosion, or occur can manually cutting off the low-temperature zone air preheater when dust stratification is serious.Not only protected equipment but also increased the flexibility of operation.Simultaneously, air-introduced machine is arranged between described two sections air preheaters, makes it to remain on for a long time under the above temperature of dew point to turn round, to guarantee the unlikely generation cold end corrosion of its impeller.
Description of drawings
Below in conjunction with accompanying drawing the present invention is described in further detail:
Fig. 1 is a residual neat recovering system layout drawing of the prior art
Fig. 2 is a residual neat recovering system layout drawing of the present invention
Fig. 3 is the planar engineering drawing of residual neat recovering system embodiment of the present invention
Fig. 4 is the facade engineering drawing of residual neat recovering system embodiment of the present invention
The specific embodiment
As shown in Figure 2, a kind of waste heat recovery system of petrochemical heating furnace comprises air preheater, air-introduced machine 3, pressure fan 4.
In order to adapt to different operating modes, described air preheater comprises high temperature section air preheater 1 and low-temperature zone air preheater 2.Specifically, the exhanst gas outlet temperature of described high temperature section air preheater 1 is the 160-170 degree, adopts tubular type or heat pipe-type or plate air preheater; The exhanst gas outlet temperature of described low-temperature zone air preheater 2 adopts board-like or cast iron plate tubular type or glass tubular type or enamel tubular type for being equal to or less than 100 degree.
Described air-introduced machine 3 is arranged between described high temperature section air preheater 1 and the low-temperature zone air preheater 2, air-introduced machine 3 is remained under the above temperature of dew point for a long time turn round, and then guarantee the unlikely generation cold end corrosion of its impeller.
Fume side and air side at described low-temperature zone air preheater 1 are provided with slide valve 5, specifically, are provided with slide valve 5 at the inlet side and the outlet side of fume side, are provided with slide valve 5 at the inlet side and the outlet side of air side.Like this, under the situation that guarantees the normal operation of high temperature section air preheater, when taking place, the flue gas low-temperature corrosion cause low-temperature zone air preheater 2 seriously to leak out or when serious obstruction takes place, can manually cut off low-temperature zone air preheater 2, thereby the low-temperature zone air preheater is cut off from residual neat recovering system fully, can carry out water flushing deashing or change heat-transfer surface it, and heating furnace still can turn round under 90% efficient this moment.
Fume side at described low-temperature zone air preheater 2 is provided with the low-temperature zone by-pass flue, described low-temperature zone by-pass flue is provided with slide valve 5, so that after low-temperature zone air preheater 2 is cut off, can manually opens the low-temperature zone by-pass flue and do not influence the operate as normal of heating furnace and high temperature section air preheater 1; Air side at described low-temperature zone air preheater 2 is provided with low-temperature zone bypass air channel, described low-temperature zone bypass air channel is provided with bypass air channel barrier 6, like this, after low-temperature zone air preheater 2 is cut off, can be with portion of air carrying-off from the low-temperature zone bypass air channel, reduce heat absorption, improve the heat-transfer surface temperature, and then avoided the cold end corrosion of high temperature section air preheater 1.In addition, in described low-temperature zone air preheater 2, be provided with high pressure water washing and drainage equipment, be used to remove clammy dust on it.
Air side outlet side at described high temperature section air preheater 1 is provided with slide valve 5, and when air preheating system was stopped transport maintenance for some reason separately, this slide valve cut out, and separates with the heating furnace in operation still, guarantees maintainer's safety.When high temperature section air outlet slit side slide valve cut out, low-temperature zone air side slide valve must cut out.
For can isolated operation at severe winter high temperature section air preheater 1, air side at described high temperature section air preheater 1 is provided with high temperature section bypass air channel, described high temperature section bypass air channel is provided with bypass air channel barrier 6, like this, can be with portion of air from high temperature section bypass air channel carrying-off, reduce heat absorption, improve the heat-transfer surface temperature, avoided the cold end corrosion of high temperature section air preheater 1.
Be exported to chimney from the heating furnace convection cell by-pass flue is set, and on described by-pass flue, by-pass flue baffle plate 8 is set, when residual neat recovering system breaks down, can interlock and cut off residual neat recovering system like this, guarantee that heating furnace normally moves; On the exhaust gases passes between outlet of heating furnace convection cell and the described air preheater, sealing baffle 7 is set.
In order to guarantee the heat exchange effect of described two-part air preheater, insulation so just can be avoided the narrower and small passage of insulated lining chip blocking plate regenerative air heater outside all flues after descending console mode flue all adopted.
The present invention is by being provided with the two-part air preheater, and making the low-temperature zone exhaust gas temperature is 100 ℃ or lower, and the thermal efficiency of heating furnace can reach more than 93%.This invention is tried out in 1,000,000 tons of/year Aromatic Hydrocarbon United Plant, and Fig. 3 and Fig. 4 are respectively the planar engineering drawing and the facade engineering drawings of this device.Find out from result on trial, heating furnace district total heat duties～360MW, the fuel gas low heat value is 12222Kcal/Kg.The one-part form residual neat recovering system is by the thermal efficiency 90%, and fuel gas consumption is 28141Kg/h.The residual neat recovering system that adopts the two-part air preheater is by the thermal efficiency 93%, and fuel gas consumption is 27233Kg/h.Package unit was counted 7627.2 tons in then annual gas capable of saving fuel in 8400 hours if go into operation per year.
Technique scheme is one embodiment of the present invention, for those skilled in the art, on the basis that the invention discloses application process and principle, be easy to make various types of improvement or distortion, and be not limited only to the described method of the above-mentioned specific embodiment of the present invention, therefore previously described mode is preferably, and does not have restrictive meaning.
Claims (5)
1. a waste heat recovery system of petrochemical heating furnace comprises air preheater, air-introduced machine, pressure fan, slide valve, bypass air channel barrier, sealing baffle, by-pass flue baffle plate, it is characterized in that:
Described air preheater comprises high temperature section air preheater and low-temperature zone air preheater;
Described air-introduced machine is arranged between described high temperature section air preheater and the low-temperature zone air preheater;
Fume side and air side at described low-temperature zone air preheater are provided with slide valve;
Fume side at described low-temperature zone air preheater is provided with the low-temperature zone by-pass flue, and described low-temperature zone by-pass flue is provided with slide valve; Air side at described low-temperature zone air preheater is provided with low-temperature zone bypass air channel, and described low-temperature zone bypass air channel is provided with the bypass air channel barrier;
In described low-temperature zone air preheater, be provided with high pressure water washing and drainage equipment.
2. waste heat recovery system of petrochemical heating furnace according to claim 1 is characterized in that:
Described high temperature section air preheater exhanst gas outlet temperature is the 160-170 degree, adopts tubular type or heat pipe-type or plate air preheater; Described low-temperature zone air preheater exhanst gas outlet temperature adopts board-like or cast iron plate tubular type or glass tubular type or enamel tubular type for being equal to or less than 100 degree.
3. waste heat recovery system of petrochemical heating furnace according to claim 1 is characterized in that:
Air side at described high temperature section air preheater is provided with slide valve; Air side at described high temperature section air preheater is provided with high temperature section bypass air channel, and described high temperature section bypass air channel is provided with the bypass air channel barrier.
4. according to the described waste heat recovery system of petrochemical heating furnace of one of claim 1 to 4, it is characterized in that:
Be exported to chimney from the heating furnace convection cell by-pass flue is set, and on described by-pass flue, the by-pass flue baffle plate is set; On the exhaust gases passes between outlet of heating furnace convection cell and the described air preheater, sealing baffle is set.
5. waste heat recovery system of petrochemical heating furnace according to claim 5 is characterized in that:
Insulation outside all flues after the descending console mode flue of heating furnace all adopt.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910077777A CN101813422A (en) | 2009-02-19 | 2009-02-19 | Waste heat recovery system of petrochemical heating furnace |
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| Application Number | Priority Date | Filing Date | Title |
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| CN200910077777A CN101813422A (en) | 2009-02-19 | 2009-02-19 | Waste heat recovery system of petrochemical heating furnace |
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| CN200910077777A Pending CN101813422A (en) | 2009-02-19 | 2009-02-19 | Waste heat recovery system of petrochemical heating furnace |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102183171A (en) * | 2011-03-23 | 2011-09-14 | 上海龙净环保科技工程有限公司 | Flue gas waste heat recovery system heat exchanger monitoring device and monitoring method |
| CN102444901A (en) * | 2011-11-30 | 2012-05-09 | 辽宁赛沃斯节能技术有限公司 | Coal power plant combined type heat pipe flue gas waste heat recovery system and method |
| CN102444900A (en) * | 2011-11-30 | 2012-05-09 | 辽宁赛沃斯节能技术有限公司 | Coal power plant controllable type heat pipe flue gas waste heat recovery system and method |
| CN103162307A (en) * | 2011-12-08 | 2013-06-19 | 洛阳合纵石化工程有限公司 | Novel process design method of tube heating furnace waste heat recovery system |
| CN103954143A (en) * | 2014-05-05 | 2014-07-30 | 山东省能源与环境研究院 | Bootstrap system for rotary cement kiln |
| CN104197763A (en) * | 2014-09-11 | 2014-12-10 | 南京圣诺热管有限公司 | Automatic control based heat storage type waste heat recovery device and method |
| CN104534893A (en) * | 2015-01-06 | 2015-04-22 | 洛阳明远石化技术有限公司 | Smoke waste heat recycling device |
| CN105403058A (en) * | 2015-10-22 | 2016-03-16 | 山东岱荣节能环保科技有限公司 | Device and process for utilizing waste heat of waste flue gas of hot-blast stove |
| CN107560462A (en) * | 2016-06-30 | 2018-01-09 | 宝山钢铁股份有限公司 | A kind of segmented smoke heat replacing device |
| CN110579315A (en) * | 2019-09-23 | 2019-12-17 | 武汉钢铁有限公司 | Heating furnace gas heat exchanger leak hunting device |
| CN112781376A (en) * | 2021-01-08 | 2021-05-11 | 刘小丽 | Petrochemical heating furnace |
-
2009
- 2009-02-19 CN CN200910077777A patent/CN101813422A/en active Pending
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102183171A (en) * | 2011-03-23 | 2011-09-14 | 上海龙净环保科技工程有限公司 | Flue gas waste heat recovery system heat exchanger monitoring device and monitoring method |
| CN102444901A (en) * | 2011-11-30 | 2012-05-09 | 辽宁赛沃斯节能技术有限公司 | Coal power plant combined type heat pipe flue gas waste heat recovery system and method |
| CN102444900A (en) * | 2011-11-30 | 2012-05-09 | 辽宁赛沃斯节能技术有限公司 | Coal power plant controllable type heat pipe flue gas waste heat recovery system and method |
| CN103162307A (en) * | 2011-12-08 | 2013-06-19 | 洛阳合纵石化工程有限公司 | Novel process design method of tube heating furnace waste heat recovery system |
| CN104296547B (en) * | 2014-05-05 | 2016-03-30 | 山东省能源与环境研究院 | A kind of cement rotary kiln bootstrap system that flash vessel is set |
| CN103954143A (en) * | 2014-05-05 | 2014-07-30 | 山东省能源与环境研究院 | Bootstrap system for rotary cement kiln |
| CN103954143B (en) * | 2014-05-05 | 2014-11-26 | 山东省能源与环境研究院 | Bootstrap system for rotary cement kiln |
| CN104296547A (en) * | 2014-05-05 | 2015-01-21 | 山东省能源与环境研究院 | Rotary cement kiln waste heat utilizing system with flash evaporator |
| CN104197763A (en) * | 2014-09-11 | 2014-12-10 | 南京圣诺热管有限公司 | Automatic control based heat storage type waste heat recovery device and method |
| CN104534893A (en) * | 2015-01-06 | 2015-04-22 | 洛阳明远石化技术有限公司 | Smoke waste heat recycling device |
| CN105403058A (en) * | 2015-10-22 | 2016-03-16 | 山东岱荣节能环保科技有限公司 | Device and process for utilizing waste heat of waste flue gas of hot-blast stove |
| CN107560462A (en) * | 2016-06-30 | 2018-01-09 | 宝山钢铁股份有限公司 | A kind of segmented smoke heat replacing device |
| CN110579315A (en) * | 2019-09-23 | 2019-12-17 | 武汉钢铁有限公司 | Heating furnace gas heat exchanger leak hunting device |
| CN112781376A (en) * | 2021-01-08 | 2021-05-11 | 刘小丽 | Petrochemical heating furnace |
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| C06 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| C53 | Correction of patent for invention or patent application | ||
| CB02 | Change of applicant information |
Address after: 100728 Beijing, Chaoyangmen, North Street, No. 22, No. Applicant after: China Petrochemical Group Corp. Co-applicant after: Sinopec Engineering Incorporation Address before: 100728 Beijing, Chaoyangmen, North Street, No. 22, No. Applicant before: China Petrochemical Group Corp. Co-applicant before: Engrg Construction Co., SINOPEC |
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| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20100825 |