CN2866467Y - Continuous caustic soda evaporation special equipment - Google Patents
Continuous caustic soda evaporation special equipment Download PDFInfo
- Publication number
- CN2866467Y CN2866467Y CNU2006201135327U CN200620113532U CN2866467Y CN 2866467 Y CN2866467 Y CN 2866467Y CN U2006201135327 U CNU2006201135327 U CN U2006201135327U CN 200620113532 U CN200620113532 U CN 200620113532U CN 2866467 Y CN2866467 Y CN 2866467Y
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- Prior art keywords
- film
- gas
- type evaporator
- raw material
- inlet
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- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 title claims abstract description 55
- 238000001704 evaporation Methods 0.000 title claims abstract description 11
- 230000008020 evaporation Effects 0.000 title claims abstract description 10
- 235000011121 sodium hydroxide Nutrition 0.000 title abstract description 12
- 239000007789 gas Substances 0.000 claims abstract description 33
- 239000002994 raw material Substances 0.000 claims abstract description 20
- 238000010438 heat treatment Methods 0.000 claims abstract description 16
- 238000006243 chemical reaction Methods 0.000 claims abstract description 6
- 230000001172 regenerating effect Effects 0.000 claims abstract description 6
- 239000000567 combustion gas Substances 0.000 claims description 16
- 230000001055 chewing effect Effects 0.000 claims description 13
- 239000006200 vaporizer Substances 0.000 claims description 12
- 239000007788 liquid Substances 0.000 claims description 10
- 239000000463 material Substances 0.000 claims description 9
- 235000015111 chews Nutrition 0.000 claims description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 8
- 239000002737 fuel gas Substances 0.000 claims description 6
- 238000000926 separation method Methods 0.000 claims description 6
- 238000009833 condensation Methods 0.000 claims description 5
- 230000005494 condensation Effects 0.000 claims description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 4
- 238000002485 combustion reaction Methods 0.000 claims description 3
- 238000002156 mixing Methods 0.000 claims description 3
- 239000003513 alkali Substances 0.000 claims description 2
- 229910052757 nitrogen Inorganic materials 0.000 claims description 2
- 238000013022 venting Methods 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 9
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 238000005338 heat storage Methods 0.000 abstract 1
- 239000002912 waste gas Substances 0.000 abstract 1
- 238000010411 cooking Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 5
- 230000001105 regulatory effect Effects 0.000 description 5
- 239000003034 coal gas Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000008676 import Effects 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 230000001939 inductive effect Effects 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 229910001018 Cast iron Inorganic materials 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 235000009508 confectionery Nutrition 0.000 description 1
- 238000010924 continuous production Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 229910017053 inorganic salt Inorganic materials 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
Images
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
- Y02P20/129—Energy recovery, e.g. by cogeneration, H2recovery or pressure recovery turbines
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- Feeding And Controlling Fuel (AREA)
Abstract
一种连续式烧碱蒸发专用设备，包括膜式蒸发器、转换装置、蒸汽预热器和废气预热器，膜式蒸发器的两端的蓄热式烧咀设有燃气接口、空气接口和排气接口，这些接口通过转换装置分别与燃气源、鼓风机和引风机连接。本实用新型的优点是：可连续生产，同时保留了炉灶法投资小，占地少，操作和工艺简单的优点；采用先进的蓄热式蒸发器进行生产，并利用预热器对原料进行预热，明显提高了蒸发器的加热均匀性和热效，保证了产品质量，节约了能源，热效可达80％以上。所有生产过程均可自动控制，产品质量和生产效率大为提高。
A special equipment for continuous caustic soda evaporation, including a film evaporator, a conversion device, a steam preheater and a waste gas preheater. The regenerative burners at both ends of the film evaporator are provided with gas ports, air ports and exhaust gas ports. These interfaces are respectively connected to the gas source, the blower and the induced draft fan through the conversion device. The utility model has the advantages that: it can be produced continuously, and at the same time retains the advantages of small investment, less land occupation, and simple operation and process of the stove method; it adopts an advanced heat storage evaporator for production, and uses a preheater to preheat the raw materials. heat, which significantly improves the heating uniformity and thermal efficiency of the evaporator, ensures product quality, saves energy, and the thermal efficiency can reach more than 80%. All production processes can be controlled automatically, and product quality and production efficiency are greatly improved.
Description
Technical field
The utility model relates to a kind of caustic soda specific equipment that anhydrates, and is a kind of caustic soda (sodium hydroxide) aqueous solution that is used for low concentration, by the equipment of evaporative removal moisture.
Background technology
At present, the solid caustic soda production technique of China mainly contains two kinds, and a kind of is primary cooking stove method, adopt the cooking stove of local method to produce for the heating of cast iron cauldron, this technology energy consumption height, cooking stove efficient only has 40-50%, simultaneously because caustic soda makes product contain impurity to the corrosion of iron pan, need add auxiliary material manually, mode with chemical reaction is removed impurity, and the difficulty of operation and randomness are all very big, and quality is very unstable, and be periodical operation, produce also unstable.Another kind is a technology and equipment of introducing Switzerland Bo Te (Bertiams) company, the inorganic salt of employing fusing and water vapor are as heating source, with the nickel material is that major equipment is produced, though but this technology has good product quality, level of automation height quantity-produced advantage, but its investment big (scale of producing 50000 tons per year need be invested 3,000,000 dollars) (need 8 kilograms per centimeter to the quality requirements height of heating energy source
2Water vapor and heat by the molten salt of Sweet natural gas heat fused), the requirement of equipment and working cost are all very high, some in addition must import.
Summary of the invention
The purpose of this utility model just provides a kind of continuous sodium hydroxide evaporation specific equipment, and to solve the energy consumption height that existing cooking stove exists, stove thermal efficiency is low, operation easier and randomness are all very big, quality is very unstable, and is periodical operation, produces unstable; And the import equipment investment is big, to the quality requirements height of heating energy source, the problem that working cost is very high.
The technical solution of the utility model is: comprise film-type evaporator, transfer equipment, vapor preheater and exhaust gas economiser, the heat accumulating type at the two ends of film-type evaporator burns to chew and is provided with combustion gas interface, air interface and exhaust port, these interfaces are connected with fuel gas source, gas blower and induced draft fan respectively by transfer equipment, wherein transfer equipment is used for the alternately conversion that described heat accumulating type burns combustion gas, air and the deflated air inlet of chewing and gives vent to anger, and burns with the heat accumulating type that satisfies the two ends correspondence and chews alternate combustion and deflated needs; The vapour outlet of described film-type evaporator is connected with the thermal source passage of vapor preheater; The exhaust port of described film-type evaporator is connected with the thermal source passage of exhaust gas economiser by described transfer equipment, the raw material interface of film-type evaporator is connected with the outlet of the material channel of vapor preheater and exhaust gas economiser, and the inlet of this vapor preheater and exhaust gas economiser interconnects the back as the feed(raw material)inlet.
The utility model has the advantages that: but continuous production, and it is little to have kept the investment of cooking stove method simultaneously, takes up an area of and lacks, operation and advantage of simple technology; Adopt advanced heat accumulating type vaporizer to produce, and utilize preheater that raw material is carried out preheating, the heating uniformity and the heat that have obviously improved vaporizer are imitated, and have guaranteed quality product, have saved the energy, and hot effect can reach more than 80%.All production processes all can be controlled automatically, and quality product and production efficiency greatly improve.
Description of drawings
Fig. 1 is the overall structure synoptic diagram of an embodiment of the utility model equipment;
Fig. 2 is the overall structure synoptic diagram of another embodiment of the utility model equipment;
Fig. 3 is that the embodiment of transfer equipment among Fig. 1 and Fig. 2 constitutes synoptic diagram;
Fig. 4 is the A-A sectional view of heat accumulating type vaporizer among Fig. 1 and Fig. 2;
Fig. 5 is the axial sectional view of the utility model heat accumulating type vaporizer.
Embodiment
Referring to Fig. 1, one of embodiment of the present utility model comprises film-type evaporator 2, transfer equipment 1, vapor preheater 3, exhaust gas economiser 4 and condensation water pot 5, the heat accumulating type burning at the two ends of film-type evaporator 2 is chewed 24 and is provided with combustion gas interface, air interface and exhaust port, and these interfaces are connected with induced draft fan with fuel gas source, air source (gas blower) respectively by transfer equipment 1.Transfer equipment 1 is used for described heat accumulating type and burns the alternately conversion of chewing 24 combustion gas, air and deflated air inlet and giving vent to anger, and burns with the heat accumulating type that satisfies the two ends correspondence and chews alternate combustion and deflated needs, belongs to routine techniques.The vapour outlet 232 of generating tube 23 upper ends of described film-type evaporator 2 central authorities is connected with the thermal source passage of vapor preheater 3 by pipeline a; The heat accumulating type of described film-type evaporator 2 burns to be chewed 24 exhaust port and is connected with the thermal source passage of exhaust gas economiser 4 with line c by described transfer equipment 1, and the generating tube 23 upper end raw material interfaces 231 of the central authorities of film-type evaporator 2 are connected in parallel by the material channel of line b and vapor preheater 3 and exhaust gas economiser 4.Outlet at the thermal source passage of described vapor preheater 3 is connected with condensation water pot 5, guarantees steam total condensation in the vapor preheater by the liquid level (its fluid level control device is not shown) that keeps condensation water pot 5.
Be connected with electrically-controlled valve K1 in described feed(raw material)inlet, be provided with temperature regulator TY and control the flow of the electrically-controlled valve K1 of feed(raw material)inlet, the temperature value of material outlet is directly proportional with the flow of feed(raw material)inlet at the products export 234 of described film-type evaporator 2.
Shown in Figure 2 is the overall structure of another embodiment of the utility model equipment, this embodiment has increased a vapour liquid separator 9 on the basis of a last embodiment, between the raw material interface 231 of the outlet of the material channel of described vapor preheater 3 and exhaust gas economiser 4 and film-type evaporator 2 and exhaust port 232, be provided with vapour liquid separator 9, alkali lye raw material after preheating enters in this vapour liquid separator 9 and carries out vapor-liquid separation, liquid after the separation is introduced the raw material interface 231 of film-type evaporator 2, sends into vapor preheater 3 after the vapor mixing that the exhaust port 232 that the steam after the separation is incorporated into film-type evaporator 2 and vaporizer are discharged.
Referring to Fig. 3, this embodiment of described transfer equipment comprises blast tube valving R, air passageways valving S and exhaust-duct valving T, this blast tube valving R is made up of two main branch roads, the main branch road on drawing top is manual valve 11, relief valve 12, repid cut-off valve 13 and the manual valve 14,15 by connecting respectively, and manual valve 14 and 15 is connected on two branch branch roads and chews 24 different combustion gas ends with the burning of described vaporizer 2 upper ends respectively and is connected.Manual valve 11 in the main branch road of another of bottom ', relief valve 12 ', repid cut-off valve 13 ' with manual valve 14 ', 15 ' respectively chew 24 different combustion gas ends with the burning of described vaporizer 2 lower ends and be connected, mode of connection is same as described above.
Described air passageways valving S is made up of two main branch roads, and the main branch road on the top respectively manual valve 16 by two parallel connections and 17 is chewed 24 combustion gas end with the burning of described vaporizer 2 upper ends respectively and is connected; The manual valve 16 of two parallel connections of the main branch road of another of bottom ' chew 24 combustion gas end with the burning of described vaporizer 2 lower ends and be connected with 17 ' respectively.
Described exhaust-duct valving T is made up of two branch roads, connects on the drawing upper branch, and the two ends of this exhaust-duct are chewed 24 exhaust side with burning respectively and are connected with gas blower.Be in series with T-valve 31 on described exhaust-duct, its two ends are connected between thermopair 19 and the electric controlled regulating valve 33, and the 3rd end of T-valve 31 is connected in parallel by another electric controlled regulating valve 32 another branch road with the bottom.Manual valve 18 in another branch road of bottom ', thermopair 19 ', T-valve 31 ', electric controlled regulating valve 32 ' with 33 ' identical with the mode of connection on top.
Between the parallel connected end of upper branch and lower leg and gas blower, be in series with orifice plate C2, tensimeter P2 and electric controlled regulating valve ZK2.
The working process of above-mentioned transfer equipment is summarized as follows:
1. fuel gas supply circuit: each burning has been chewed two fuel gas inlet, one be main burn to chew use the gas supply loop, control by coal gas repid cut-off valve 13 and 15 two valves of manual valve, cut valve 13 trip switchs soon, manual valve C controls air demand.Another import is that igniting is chewed (be commonly called as pilot burner, the main burning that be used to ignite chewed combustion gas) and use fuel gas inlet, is controlled by manual valve 14, and is substantially no longer moving after generally mixing up.
2. gas blower goes each burning to chew route:
Directly going each burning to chew 24 has two-way, i.e. two manual valves 16 and 17 control circuits, a top manual valve 16 be to pilot burner for air, a following manual valve 17 be both to pilot burner for air, again pilot burner is played cooling effect.
Go to burn by three-way diverter valve 31 and chew 24, be mainly used in the switching of burning air blast and air inducing when chewing burning.
3. burn up and down that to chew 24 pilot burner all are long-term burnings, its combustion gas intake valve 15 manual valves 1416 and air inlet valve and air cooling valve 17 all are to open for a long time, are in the optimum position (promptly guaranteeing the optimum position that pilot burner does not go out) of arts demand.
4. when following burning is chewed burning, at this moment:
The following coal gas repid cut-off valve of chewing 13 ' that burns is opened, and downside burns the T-valve of chewing 31 ' and is in burning is chewed the inlet mouth position (promptly chewing air blast to burning) that links to each other with air blast.
Downside burns the manual valve of chewing 18 ' and is opened to correct position (according to the temperature regulation in the vaporizer);
Downside burns the manual valve 14 ', 16 ' and 17 ' of chewing pilot burner and all opens (length is opened manual regulation).
5. when the top burning is chewed burning, at this moment:
The top is burnt the coal gas repid cut-off valve 13 chew and is closed, and upside burns the T-valve of chewing 31 and is in upside burnt and chews the air inlet position (promptly chewing air inducing to the upside burning) that links to each other with induced draft fan;
Upside burns the manual valve of chewing 18 and is opened to correct position (long opening can be regulated according to temperature in the stove);
Upside burns the manual valve 14,16 and 17 of chewing pilot burner and all opens (length is opened manual regulation).
6. switching time: the temperature of being surveyed smoke evacuation by thermopair 34 and 34 ' is controlled, and changes two T-valve 31 and 31 ' automatically by controller (not shown) when reaching set temperature value.
7. all control automatically of all self-acting valves is carried out by microcomputerized controller.
Referring to Fig. 4 and Fig. 5, described film-type evaporator 2 comprises cover 22 in film forming device 233, generating tube 23, the heating, add hot jacket 21 and described regenerative gas burns and chews 24, cover 22 and overcoat 21 leave the gap between the three in the outside of generating tube 23 side is with the heating of concentric.Two ends between interior overcoat are equipped with regenerative gas and are burnt and to chew 24, and this burning is chewed 24 outer end and is connected with corresponding end by transfer equipment 1.Between the cover 22 a plurality of thermopairs 28 and pressure gauge connection 29 are housed in generating tube 23 and heating, thermopair 28 is used to control the burning degree that burning is chewed, to guarantee temperature value and the homogeneity in the stove.Two ends in generating tube 23 and heating between the cover 22 are respectively equipped with nitrogen (or other rare gas element) inflation inlet 26 and venting port 25; Be provided with pressure relief opening 27 in described hot jacket 21 outsides that add; In the upper end of generating tube 23 film forming device 233 is housed.Fig. 4 is mainly used in cover 22 in expression generating tube 23, the heating, add hot jacket 21 and regenerative gas burns and chews 24 position distribution, structures such as not shown thermopair 28 and pressure gauge connection 29.
Described film forming device 233 circular cone tubes, little mouth down is loaded on the upper end of generating tube 23, is provided with a plurality of recesses that are uniformly distributed along the circumference in the upper end of circular cone tube.
The principle of work of the utility model equipment is summarized as follows: concentration is behind 32%～50% caustic soda soln process vapor preheater 3 and exhaust gas economiser 4 preheatings, be input in the film-type evaporator 2 and evaporate, this vaporizer 2 adopts heat accumulating types to burn to chew 24 and heat with combustion gas; Combustion gas after the water vapour of evaporation and the combustion gas heating is drawn, and carries out preheating by vapor preheater 3 and 4 pairs of described raw materials of exhaust gas economiser respectively; Export the product caustic soda of the not water content after evaporating from the lower end of described film-type evaporator 2.
Claims (6)
1. a continuous sodium hydroxide evaporates specific equipment, it is characterized in that: comprise film-type evaporator, transfer equipment, vapor preheater and exhaust gas economiser, the heat accumulating type at the two ends of film-type evaporator burns to chew and is provided with combustion gas interface, air interface and exhaust port, these interfaces are connected with fuel gas source, gas blower and induced draft fan respectively by transfer equipment, wherein transfer equipment is used for the alternately conversion that described heat accumulating type burns combustion gas, air and the deflated air inlet of chewing and gives vent to anger, and burns with the heat accumulating type that satisfies the two ends correspondence and chews alternate combustion and deflated needs; The vapour outlet of described film-type evaporator is connected with the thermal source passage of vapor preheater; The exhaust port of described film-type evaporator is connected with the thermal source passage of exhaust gas economiser by described transfer equipment, the raw material interface of film-type evaporator is connected with the outlet of the material channel of vapor preheater and exhaust gas economiser, and the inlet of this vapor preheater and exhaust gas economiser interconnects the back as the feed(raw material)inlet.
2. continuous sodium hydroxide evaporation specific equipment according to claim 1, it is characterized in that: the outlet at described vapor preheater thermal source passage is connected with the condensation water pot.
3. continuous sodium hydroxide evaporation specific equipment according to claim 1, it is characterized in that: described film-type evaporator comprises cover in the film forming device, generating tube, heating, add hot jacket and described regenerative gas burns and chews, cover and overcoat in the generating tube outside is with the heating of concentric, leave the gap between the three, two ends between interior overcoat are equipped with regenerative gas and are burnt and to chew, and the outer end that this burning is chewed is connected with corresponding end by transfer equipment; In generating tube and heating, between the cover thermopair and pressure gauge connection are housed; Two ends in generating tube and heating between the cover are respectively equipped with the inflation inlet and the venting port of nitrogen or rare gas element; Be provided with pressure relief opening in the described hot jacket outside that adds; Film forming device is equipped with in upper end at generating tube.
4. continuous sodium hydroxide evaporation specific equipment according to claim 1 is characterized in that: also be included in orifice plate, tensimeter and electrically-controlled valve that described combustion gas and gas inlet are connected in series.
5. continuous sodium hydroxide evaporation specific equipment according to claim 1, it is characterized in that: be connected with electrically-controlled valve in described feed(raw material)inlet, be provided with temperature regulator and control the flow of the electrically-controlled valve of feed(raw material)inlet at the products export of described film-type evaporator, the temperature value of material outlet is directly proportional with the flow of feed(raw material)inlet.
6. continuous sodium hydroxide evaporation specific equipment according to claim 1, it is characterized in that: between the raw material interface of the outlet of the material channel of described vapor preheater and exhaust gas economiser and film-type evaporator and exhaust port, be provided with vapour liquid separator, alkali lye raw material after preheating enters this vapour liquid separator and carries out vapor-liquid separation, liquid after the separation is introduced the raw material interface of film-type evaporator, and the steam after the separation is incorporated into the exhaust port of film-type evaporator and the vapor mixing that vaporizer is discharged.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2006201135327U CN2866467Y (en) | 2006-05-09 | 2006-05-09 | Continuous caustic soda evaporation special equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2006201135327U CN2866467Y (en) | 2006-05-09 | 2006-05-09 | Continuous caustic soda evaporation special equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2866467Y true CN2866467Y (en) | 2007-02-07 |
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ID=37702170
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2006201135327U Expired - Fee Related CN2866467Y (en) | 2006-05-09 | 2006-05-09 | Continuous caustic soda evaporation special equipment |
Country Status (1)
| Country | Link |
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| CN (1) | CN2866467Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102303876A (en) * | 2011-05-24 | 2012-01-04 | 天辰化工有限公司 | Method for mixed burning of natural gas and calcium carbide furnace gas |
-
2006
- 2006-05-09 CN CNU2006201135327U patent/CN2866467Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102303876A (en) * | 2011-05-24 | 2012-01-04 | 天辰化工有限公司 | Method for mixed burning of natural gas and calcium carbide furnace gas |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: TIANJIN ZHIZHEN CHEMICAL TECHNOLOGY DEVELOPMENT C Free format text: FORMER OWNER: XU ZENGHUI Effective date: 20070921 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20070921 Address after: 300450 No. 2221, Shanghai Road, Tanggu District, Tianjin Patentee after: Tianjin ZhiZhen Chemical Technology & Development Co., Ltd. Address before: 300451 Tianjin city Tanggu District Station Road No. 5 Longsheng garden 3-2-102 Patentee before: Xu Zenghui |
|
| DD01 | Delivery of document by public notice |
Addressee: Xu Zengxian Document name: Notification to Pay the Fees |
|
| DD01 | Delivery of document by public notice |
Addressee: Tianjin ZhiZhen Chemical Technology & Development Co., Ltd. Document name: Notification of Termination of Patent Right |
|
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20070207 Termination date: 20100509 |