CN203629342U - Exhaust-heat boiler device for fuel oil type phosphate ore calcining kiln - Google Patents
Exhaust-heat boiler device for fuel oil type phosphate ore calcining kiln Download PDFInfo
- Publication number
- CN203629342U CN203629342U CN201320816590.6U CN201320816590U CN203629342U CN 203629342 U CN203629342 U CN 203629342U CN 201320816590 U CN201320816590 U CN 201320816590U CN 203629342 U CN203629342 U CN 203629342U
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- China
- Prior art keywords
- heat boiler
- waste heat
- exhaust
- evaporimeter
- fuel oil
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- 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 - Lifetime
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- 239000000295 fuel oil Substances 0.000 title claims abstract description 18
- 238000001354 calcination Methods 0.000 title claims abstract description 16
- 229910019142 PO4 Inorganic materials 0.000 title abstract 3
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 title abstract 3
- 239000010452 phosphate Substances 0.000 title abstract 3
- 238000007599 discharging Methods 0.000 claims abstract description 27
- 238000010438 heat treatment Methods 0.000 claims abstract description 24
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 20
- 239000010959 steel Substances 0.000 claims abstract description 20
- 239000002918 waste heat Substances 0.000 claims description 63
- 239000007789 gas Substances 0.000 claims description 30
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 19
- 239000003546 flue gas Substances 0.000 claims description 19
- 239000011449 brick Substances 0.000 claims description 15
- 239000002367 phosphate rock Substances 0.000 claims description 13
- 239000000843 powder Substances 0.000 claims description 13
- 238000013459 approach Methods 0.000 claims description 12
- 238000009792 diffusion process Methods 0.000 claims description 12
- 238000009413 insulation Methods 0.000 claims description 9
- 239000004567 concrete Substances 0.000 claims description 8
- 239000000463 material Substances 0.000 claims description 8
- 239000010455 vermiculite Substances 0.000 claims description 5
- 229910052902 vermiculite Inorganic materials 0.000 claims description 5
- 235000019354 vermiculite Nutrition 0.000 claims description 5
- 239000000779 smoke Substances 0.000 abstract description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 5
- 238000001816 cooling Methods 0.000 abstract description 3
- 238000007789 sealing Methods 0.000 abstract description 3
- 238000012546 transfer Methods 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 4
- 238000010276 construction Methods 0.000 description 3
- 239000000428 dust Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000011280 coal tar Substances 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 238000013517 stratification Methods 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 230000003416 augmentation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 235000014171 carbonated beverage Nutrition 0.000 description 1
- 235000019504 cigarettes Nutrition 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
Images
Classifications
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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
Landscapes
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
Abstract
The utility model relates to an exhaust-heat boiler device for a fuel oil type phosphate ore calcining kiln which pertains to the technical field of equipment of a heating supply system. The exhaust-heat boiler device comprises an exhaust-heat boiler. The exhaust-heat boiler comprises an exhaust-heat boiler heating surface and a steam pocket. The steam pocket is arranged at the upper portion of the exhaust-heat boiler heating surface. The exhaust-heat boiler is in the structure of horizontal forced circulation and provided with a smoke inlet and a smoke outlet. The smoke inlet of the exhaust-heat boiler is provided with a smoke diffusing and settling chamber. The heating surface in the exhaust-heat boiler is sequentially provided with a water cooling segment, a steam super-heater, a first evaporator and a second evaporator along the smoke flow direction. Additionally, an air locking and ash discharging device is arranged below the smoke diffusing and settling chamber, the water cooling segment, the steam super-heater, the first evaporator and the second evaporator. A boiler wall of the exhaust-heat boiler is of a totally-sealed structure formed by combination of a light-duty boiler wall and an externally-protecting steel plate. The exhaust-heat boiler device for the fuel oil type phosphate ore calcining kiln is small in occupied area, safe in steam super-heater, timely in ash discharge and fine in sealing performance of the boiler wall.
Description
Technical field
The utility model relates to a kind of exhaust-heat boiler system equipment, and it is applied to the fuel oil type rock phosphate in powder calcination rotary kiln that heavy oil or coal tar wet goods are fuel; Belong to heating system equipment technical field.
Background technology
At present, the afterheat boiler system of fuel oil type (heavy oil or coal tar are fuel) rock phosphate in powder calcination rotary kiln is generally made up of the parts such as steam superheater and evaporimeter, often has several respects deficiency in practice:
1. steam superheater is directly subject to high-temperature flue gas radiation, washes away, and the easy overtemperature of steam superheater and cause heat exchanger tube to burn out is changed frequently, affects the continuous service of waste heat boiler;
2. waste heat boiler heating surface dust stratification is serious, and ash discharge not in time, causes part heating surface area dust stratification, and heat-transfer effect reduces, and exhaust gas temperature raises, and affects system heat recovery rate;
3. waste heat boiler furnace wall sealing is poor.
Utility model content
The utility model is for the deficiency of the problems referred to above, propose that a kind of floor space is little, steam superheater safety, ash discharge in time and the waste heat boiler equipment of the fuel oil type rock phosphate in powder calcining kiln of furnace wall good airproof performance.
The utility model is that the technical scheme that solves the problems of the technologies described above proposition is: a kind of waste heat boiler equipment of fuel oil type rock phosphate in powder calcining kiln, comprise waste heat boiler, described waste heat boiler comprises waste heat boiler heating surface and drum, described drum is arranged on the top of waste heat boiler heating surface, and described waste heat boiler is horizontal forced circulation structure, described waste heat boiler is provided with gas approach and exhanst gas outlet, and described gas approach is arranged at the top of a side of waste heat boiler, and exhanst gas outlet is arranged at another side of waste heat boiler, the gas approach of described waste heat boiler arranges flue gas diffusion expansion chamber, the heating surface of described waste heat boiler inside is disposed with water-cooled section along flue gas flow direction, steam superheater, the first evaporimeter and the second evaporimeter, simultaneously described flue gas diffusion expansion chamber, water-cooled section, steam superheater, the below of the first evaporimeter and the second evaporimeter is provided with lock gas ash exhauster, described lock gas ash exhauster is one and above infundibulate ash exhauster, the bottom of described infundibulate ash exhauster offers infundibulate ash discharging hole, on described infundibulate ash discharging hole, be provided with star-shaped ash discharging valve, in described infundibulate ash discharging hole, be equiped with material level recoil simulator, and the motor of described material level recoil simulator and star-shaped ash discharging valve is set up chain, it is the coiled pipe of 32mm-51mm that the heating surface of described water-cooled section, steam superheater, the first evaporimeter and the each parts of the second evaporimeter all adopts caliber, the furnace wall of described waste heat boiler adopts light boiler setting to add the outer all-welded furnace wall all-sealed structure of steel plate that protects.
Preferred: described furnace wall all-sealed structure comprises the refractory brickwork that build by laying bricks or stones in coiled pipe outside, and described refractory brickwork is poured into a mould vermiculite concrete heat-insulation layer outward, and steel plate and channel-section steel steelframe welded seal are protected in described heat-insulation layer external application outward.
Preferred: on described furnace wall, be provided with and draw brick, heat-resisting arm-tie and drag hook, described in draw the spacing of brick between 0.4m to 1m, and described heat-resisting arm-tie and drag hook are connected with outside channel-section steel steelframe.
Preferred: described in to draw the spacing of brick be 0.6m.
Preferred: the caliber of described coiled pipe is 38mm.
The waste heat boiler equipment of fuel oil type rock phosphate in powder calcining kiln of the present utility model, compared to existing technology, there is following beneficial effect: 1. owing to being provided with water-cooled section parts before steam superheater, therefore effective radiation-inhibiting heat, reduce the flue-gas temperature of superheater entrance, avoid high-temperature flue gas to directly the washing away of superheater tube, protection superheater;
2. because described lock gas ash exhauster is infundibulate ash exhauster, this infundibulate ash exhauster comprises infundibulate ash discharging hole and star-shaped ash discharging valve, installing material level recoil simulator in described infundibulate ash discharging hole, and set up chain with the motor of star-shaped ash discharging valve, therefore can realize automatic removing dust, prevent fouling of heating surface and make heat-transfer effect reduce;
3. because the furnace wall of waste heat boiler adopts the all-welded furnace wall all-sealed structure of the additional steel panel of light boiler setting, therefore waste heat boiler good airproof performance, (cigarette) do not leak out.
4. because the entire arrangement of waste heat boiler adopts horizontal forced circulation structure, arrange successively from left to right water-cooled section, steam superheater, the first evaporimeter and the second evaporimeter, the flexible setting in drum position is not limited by or not existing place, and therefore overall floor space is little, and construction investment cost is low.
5. form because the each parts heating surface of water-cooled section, steam superheater, the first evaporimeter and the second evaporimeter of waste heat boiler all adopts pipe machinery that caliber is less to bend, augmentation of heat transfer, to improve the thermal efficiency; Manufactory's Knockdown block dissolves factory, reduces mounting site working strength.
6. be arranged on the top of waste heat boiler heating surface due to described drum, therefore the flexible setting in drum position is not limited by or not existing place, entirety floor space is little, construction investment cost is low, the needs of arranging according to factory building can be arranged on appropriate location by drum, are not subject to the restriction of absolute altitude and relative position.
7. owing to being provided with flue gas diffusion expansion chamber; therefore after exhaust-heat boiler flue gas enters; directly do not wash away water-cooled section and be introduced into flue gas diffusion expansion chamber, after diffusion sedimentation, smoke gas flow is uniform and stable by what become, thereby can effectively protect water-cooled section and water-cooled section to be heated evenly.
8. be the coiled pipe of 32mm-51mm because the heating surface of described water-cooled section, steam superheater, the first evaporimeter and the each parts of the second evaporimeter all adopts caliber, therefore can effectively reduce the metal consumption of waste heat boiler, dwindle boiler volume, more aobvious compactness is arranged in technological process.
Accompanying drawing explanation
Fig. 1 is device systems layout drawing of the present utility model;
Fig. 2 is the coiled pipe structure of boiler water-cooling section of the present utility model (evaporator section);
Fig. 3 is that light boiler setting of the present utility model adds the outer full welded seal structure of steel plate of protecting;
1. flue gas diffusion expansion chambers in figure, 2. drum, 3. water-cooled section, 4. steam superheater, 5. the first evaporimeter, 6. the second evaporimeter, 7. coiled pipe, 8. infundibulate ash exhauster, 9. infundibulate ash discharging hole, 10 star-shaped ash discharging valves, 11 refractory brickworks, 12. vermiculite concrete heat-insulation layers, the 13. outer steel plates that protect, 14. draw brick, 15. heat-resisting arm-ties, 16. heat resistance concretes.
The specific embodiment
Accompanying drawing discloses the structural representation of a preferred embodiment of the utility model without limitation, explains the technical solution of the utility model below with reference to accompanying drawing.
Embodiment
The waste heat boiler equipment of a kind of fuel oil type rock phosphate in powder calcining kiln of the present embodiment, as Figure 1-3, comprise waste heat boiler, described waste heat boiler comprises waste heat boiler heating surface and drum 2, described drum 2 is arranged on the top of waste heat boiler heating surface, and described waste heat boiler is horizontal forced circulation structure, described waste heat boiler is provided with gas approach and exhanst gas outlet, and described gas approach is arranged at the top of a side of waste heat boiler, and exhanst gas outlet is arranged at another side of waste heat boiler, the gas approach of described waste heat boiler arranges flue gas diffusion expansion chamber 1, the heating surface of described waste heat boiler inside is disposed with water-cooled section 3 along flue gas flow direction, steam superheater 4, the first evaporimeter 5 and the second evaporimeter 6, simultaneously described flue gas diffusion expansion chamber 1, water-cooled section 3, steam superheater 4, the below of the first evaporimeter 5 and the second evaporimeter 6 is provided with lock gas ash exhauster, described lock gas ash exhauster is one and above infundibulate ash exhauster 8, the bottom of described infundibulate ash exhauster 8 offers infundibulate ash discharging hole 9, on described infundibulate ash discharging hole 9, be provided with star-shaped ash discharging valve 10, in described infundibulate ash discharging hole 9, be equiped with material level recoil simulator, and the motor of described material level recoil simulator and star-shaped ash discharging valve is set up chain, it is the coiled pipe 7 of 32mm-51mm that the heating surface of described water-cooled section 3, steam superheater 4, the first evaporimeter 5 and second evaporimeter 6 each parts all adopts caliber, the furnace wall of described waste heat boiler adopts light boiler setting to add the outer all-welded furnace wall all-sealed structure of steel plate that protects.
Described furnace wall all-sealed structure comprises the refractory brickwork 11 that build by laying bricks or stones in coiled pipe outside, the outer cast vermiculite concrete of described refractory brickwork 11 heat-insulation layer 12, and steel plate 13 and channel-section steel steelframe welded seal are protected in described heat-insulation layer external application outward.
On described furnace wall, be provided with and draw brick 14, heat-resisting arm-tie 15 and drag hook, described in draw the spacing of brick between 0.4m to 1m, and described heat-resisting arm-tie 15 and drag hook are connected with outside channel-section steel steelframe.
Described spacing of drawing brick 14 is 0.6m.
The caliber of described coiled pipe 7 is 38mm.
Concrete the waste heat boiler of fuel oil type rock phosphate in powder calcining kiln of the present invention, comprises water-cooled section, steam superheater, the first evaporimeter, the second evaporimeter and drum as shown in Figure 1 and Figure 2, and described waste heat boiler is horizontal forced circulation structure; Drum is arranged on the top of waste heat boiler; The gas approach of described waste heat boiler arranges flue gas diffusion expansion chamber, and lock gas ash exhauster is installed in the bottom of waste heat boiler, and the exhanst gas outlet of waste heat boiler is installed on the right side of gas approach; Described water-cooled section, steam superheater, the first evaporimeter and the second evaporimeter are arranged in the heating surface of waste heat boiler from left to right successively along flue gas flow direction; The heat-transfer area of described waste heat boiler adopts the less pipe of caliber, and machinery is bent into serpentine configuration.
In Fig. 1, waste gas flows into diffusion expansion chamber 1 from gas approach, flow through successively from left to right water-cooled section 3, steam superheating 4 devices, the first evaporimeter 5 and the second evaporimeter 6, carbonated drink flow process is that self-water-supply is to drum 2, the steam water interface that water-cooled section 3, the first evaporimeter 5 and the second evaporimeter 6 produce forms steam/water circulating loop by fairlead and down-comer and drum 2, and the saturated vapor in drum 2 produces superheated steam through steam superheater 4 again.
In Fig. 2, heat-transfer area adopts the less pipe machinery of caliber to be bent into coiled pipe 7, and manufactory's Knockdown block dissolves factory.
In Fig. 1, boiler bottom arranges infundibulate ash exhauster 8 and the welding of boiler steelframe base plate, its lower end is provided with infundibulate ash discharging hole 9 and is connected with star-shaped ash discharging valve 10, star-shaped ash discharging valve 10 seals, installing material level recoil simulator in infundibulate ash discharging hole, and set up chainly with the motor of star-shaped ash discharging valve, in the time that reaching a certain amount of, ash wherein just can automatically discharge.
In Fig. 3, outside adding, furnace wall employing light boiler setting protects the full welded seal structure of steel plate, build refractory brickwork 11 by laying bricks or stones in boiler coils 7 outsides, wall is poured into a mould vermiculite concrete 12 heat-insulation layers outward, and steel plate 13 and the welding of channel-section steel steelframe, integral sealing are protected in heat-insulation layer external application outward.On furnace wall, arrange and draw brick 14 every 0.6m left and right, add heat resistance concrete 16 with heat-resisting arm-tie 15 and be connected with outside channel-section steel steelframe.
In sum: the heat-transfer area of described waste heat boiler adopts the less pipe of caliber, effectively reduce the metal consumption of waste heat boiler, dwindle boiler volume, more aobvious compactness is arranged in technological process.Therefore, the utility model floor space is little, can effectively save equipment investment and construction investment cost; Waste heat boiler adopts forced circulation, and the needs of arranging according to factory building can be arranged on appropriate location by drum, are not subject to the restriction of absolute altitude and relative position; Still can keep reliable steam/water circulating in load variations and inlet flue gas temperature and the irregular variation of exhaust gas volumn or while acutely changing; Start and stop stove speed is fast, functional; Wall pipe is few, furnace wall good airproof performance, and air leakage coefficient is little.
Above by reference to the accompanying drawings the preferred specific embodiment of described the utility model only for embodiment of the present utility model is described; rather than as the restriction to aforementioned utility model object and claims content and scope; every foundation technical spirit of the present utility model, to any simple modification made for any of the above embodiments, equivalent variations and modification, all still belongs to the utility model technology and rights protection category.
Claims (5)
1. the waste heat boiler equipment of a fuel oil type rock phosphate in powder calcining kiln, comprise waste heat boiler, described waste heat boiler comprises waste heat boiler heating surface and drum, it is characterized in that: described drum is arranged on the top of waste heat boiler heating surface, and described waste heat boiler is horizontal forced circulation structure, described waste heat boiler is provided with gas approach and exhanst gas outlet, and described gas approach is arranged at the top of a side of waste heat boiler, and exhanst gas outlet is arranged at another side of waste heat boiler, the gas approach of described waste heat boiler arranges flue gas diffusion expansion chamber, the heating surface of described waste heat boiler inside is disposed with water-cooled section along flue gas flow direction, steam superheater, the first evaporimeter and the second evaporimeter, simultaneously described flue gas diffusion expansion chamber, water-cooled section, steam superheater, the below of the first evaporimeter and the second evaporimeter is provided with lock gas ash exhauster, described lock gas ash exhauster is one and above infundibulate ash exhauster, the bottom of described infundibulate ash exhauster offers infundibulate ash discharging hole, on described infundibulate ash discharging hole, be provided with star-shaped ash discharging valve, in described infundibulate ash discharging hole, be equiped with material level recoil simulator, and the motor of described material level recoil simulator and star-shaped ash discharging valve is set up chain, it is the coiled pipe of 32mm-51mm that the heating surface of described water-cooled section, steam superheater, the first evaporimeter and the each parts of the second evaporimeter all adopts caliber, the furnace wall of described waste heat boiler adopts light boiler setting to add the outer all-welded furnace wall all-sealed structure of steel plate that protects.
2. the waste heat boiler equipment of fuel oil type rock phosphate in powder calcining kiln according to claim 1, it is characterized in that: described furnace wall all-sealed structure comprises the refractory brickwork that build by laying bricks or stones in coiled pipe outside, described refractory brickwork is poured into a mould vermiculite concrete heat-insulation layer outward, and steel plate and channel-section steel steelframe welded seal are protected in described heat-insulation layer external application outward.
3. the waste heat boiler equipment of fuel oil type rock phosphate in powder calcining kiln according to claim 1, it is characterized in that: on described furnace wall, be provided with and draw brick, heat-resisting arm-tie and drag hook, the described spacing of brick of drawing is between 0.4m to 1m, and described heat-resisting arm-tie and drag hook are connected with outside channel-section steel steelframe.
4. the waste heat boiler equipment of fuel oil type rock phosphate in powder calcining kiln according to claim 3, is characterized in that: described in to draw the spacing of brick be 0.6m.
5. the waste heat boiler equipment of fuel oil type rock phosphate in powder calcining kiln according to claim 1, is characterized in that: the caliber of described coiled pipe is 38mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320816590.6U CN203629342U (en) | 2013-12-12 | 2013-12-12 | Exhaust-heat boiler device for fuel oil type phosphate ore calcining kiln |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320816590.6U CN203629342U (en) | 2013-12-12 | 2013-12-12 | Exhaust-heat boiler device for fuel oil type phosphate ore calcining kiln |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203629342U true CN203629342U (en) | 2014-06-04 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320816590.6U Expired - Lifetime CN203629342U (en) | 2013-12-12 | 2013-12-12 | Exhaust-heat boiler device for fuel oil type phosphate ore calcining kiln |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203629342U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109099410A (en) * | 2018-09-06 | 2018-12-28 | 黑龙江赫尔特生物质能源发展有限公司 | Combined type heat-exchanger rig without combustion system |
| CN110043882A (en) * | 2017-12-08 | 2019-07-23 | 三菱日立电力系统株式会社 | Heat recovery boiler and bearing method |
-
2013
- 2013-12-12 CN CN201320816590.6U patent/CN203629342U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110043882A (en) * | 2017-12-08 | 2019-07-23 | 三菱日立电力系统株式会社 | Heat recovery boiler and bearing method |
| CN110043882B (en) * | 2017-12-08 | 2021-01-26 | 三菱动力株式会社 | Waste heat recovery boiler and supporting method |
| CN109099410A (en) * | 2018-09-06 | 2018-12-28 | 黑龙江赫尔特生物质能源发展有限公司 | Combined type heat-exchanger rig without combustion system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: JIANGSU DONGJIU HEAVY INDUSTRIES CO., LTD. Free format text: FORMER NAME: YANCHENG CITY BOILER MANUFACTURING CO., LTD. |
|
| CP01 | Change in the name or title of a patent holder |
Address after: 224005 No. 5, Pioneer Road, Jiangsu, Yancheng City Patentee after: JIANGSU DONGJIU HEAVY INDUSTRY Co.,Ltd. Address before: 224005 No. 5, Pioneer Road, Jiangsu, Yancheng City Patentee before: YANCHENG BOILER MANUFACTURING CO.,LTD. |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140604 |