CN203613150U - Feed coal front-loading pyrolysis device used for large-scale pulverized coal furnace - Google Patents
Feed coal front-loading pyrolysis device used for large-scale pulverized coal furnace Download PDFInfo
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- CN203613150U CN203613150U CN201320824654.7U CN201320824654U CN203613150U CN 203613150 U CN203613150 U CN 203613150U CN 201320824654 U CN201320824654 U CN 201320824654U CN 203613150 U CN203613150 U CN 203613150U
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Abstract
The utility model discloses a feed coal front-loading pyrolysis device for a large-scale pulverized coal furnace. The pyrolysis device comprises a feed coal scuttle, rectangular star-shaped unloading machines, a steam fluidized bed dryer, a spiral coal feeder, a combined-type coal pyrolysis device, a carbocoal delivery heat exchanger and a coal pulverizer which are sequentially connected; a fluidization steam air distribution plate is arranged at the lower part of the steam fluidized bed dryer; a secondary steam outlet is formed in the upper part of the steam fluidized bed dryer; the secondary steam outlet is connected with a secondary steam recycling system through an electric dust collector; a fluidized coal gas air distribution plate is arranged at the lower part of the combination-type coal pyrolysis device; a built-in separator is arranged at the middle part inside the combination-type coal pyrolysis device; the built-in separator is a cyclone separator with multiple inlets; the air outlet at the top part of the built-in separator heat exchange is connected with the fluidization coal gas air distribution plate after the heat of the air outlet is exchanged through a high-temperature heat pipe exchanger and hot flue gas of a gas-fired furnace; a poly-generation system of heat, electricity, oil and coal gas can be realized; the classification utilization of coal not only can be realized, but also the graded utilization of thermal energy is realized; the pyrolysis device is conducive to energy conservation and emission reduction and can improve the economic benefits of thermoelectric enterprises.
Description
Technical field
The utility model relates to a kind of pyrolysis of coal device, particularly a kind of preposition pyrolysis installation of feed coal for large coal fired boilers.
Background technology
At present, for heat, electricity, oil, the coal gas Poly-generation engineering of big and medium-sized cities and comprehensive Coal Chemical Industry production garden, can make it in power generation and heat supply, output coal gas, tar and other chemical by-products.In this technique, need to use pyrolysis of coal device.
Utility model name is called the Chinese patent ZL94119045.5 of the technology and equipment of the preposition coal gas generation of boiler, the technique occurring for the preposition coal gas of boiler of electricity, heat and coal gas three coproduction is disclosed, coal and hot ash mix and the part thermo-cracking of coal is carried out on the top of thermal cracker and Gas Flow gasifying device, the continuation thermo-cracking of coal is carried out in the bottom of thermal cracker and Gas Flow gasifying device, with reach first hot lysate first discharge with rear hot lysate after discharge.Its equipment mainly comprises circular fluid bed, thermal cracker (dry distiller), divider, Gas Flow gasifying device and automatic control system etc.This utility model has the coal of making and hot ash and mixes with thermo-cracking fully, improves gas yield and ensures the quality of products stable; Coal suitability broadness; Free from environmental pollution; Monitor and control with computer, realize the advantage of Automation of Manufacturing Process.
In prior art, in order to adapt to current circular fluid bed constantly to the trend of large scale development, disclose utility model name and be called for the Chinese patent ZL200820122600.5 of the side gazogene of big-and-middle-sized circular fluid bed said apparatus is improved; In order to reduce floor space, the reduction equipment manufacturing cost of above-mentioned gazogene, utility model name is called for the Chinese patent ZL201220098664.2 of the combined gazogene of circular fluid bed to be improved again said apparatus.
At least there is following problem in above-mentioned prior art:
Above-mentioned improved gazogene can not adapt at present widely used Poly-generation big-and-middle-sized, high-parameters coal-powder boiler and apply; Prior art equipment complex structure, equipment manufacturing cost is high.
Utility model content
The purpose of this utility model be to provide a kind of simple in structure, running cost is low, it is low to pollute, be applicable to high moisture, the preposition pyrolysis installation of feed coal for large coal fired boilers of low-disintegration coal kind.
To achieve these goals, the technical solution adopted in the utility model is:
The preposition pyrolysis installation of feed coal for large coal fired boilers of the present utility model, comprise raw material coal bunker, the feed opening of described raw material coal bunker bottom is connected with the opening for feed at steam fluidized bed dryer top by rectangular star-like unloading machine, the discharge port of described steam fluidized bed dryer bottom is connected with the opening for feed at combined pyrolysis of coal device middle part by screw-type coal distributor, and the discharge port of described combined pyrolysis of coal bottom of device is connected with coal pulverizer by semicoke delivery heat transfer device;
The bottom of described steam fluidized bed dryer is provided with fluidization steam vapor air distribution plate, described fluidization steam vapor air distribution plate is connected with vapour line, the top of described steam fluidized bed dryer is provided with secondary steam outlet, described secondary steam outlet is connected with secondary steam recovery system by electric precipitator, and the steam outlet of described secondary steam recovery system is connected with described fluidization steam vapor air distribution plate;
Described combined pyrolysis of coal device bottom is provided with fluidisation coal gas air distribution plate, in described combined pyrolysis of coal device, middle part is provided with built-in splitter, described built-in splitter is many inlet cyclones, the aggregate bin top of described combined pyrolysis of coal bottom of device is located in the separating material outlet of described built-in splitter bottom, and the air outlet at described built-in splitter top is connected with described fluidisation coal gas air distribution plate by oil gas purification system, gas compressor, described semicoke delivery heat transfer device, high temperature heat pipe heat exchanger successively;
The hot exhanst gas outlet of gas fired furnace is connected with smoke induced draught fan by described high temperature heat pipe heat exchanger.
The technical scheme being provided by above-mentioned the utility model can be found out, the preposition pyrolysis installation of feed coal for large coal fired boilers of the present utility model, owing to adopting, steam fluidized bed dryer, combined pyrolysis of coal device etc. are moisture to height, low-disintegration coal kind is dewatered and pyrolysis processing, can realize heat, electricity, oil, coal gas polygenerations systeme, not only realize coal grading utilization, the cascade utilization of heat energy, is conducive to energy-saving and emission-reduction, and can improve the economic benefit of Thermal Power Enterprises.
Accompanying drawing explanation
The structural representation of the preposition pyrolysis installation of feed coal for large coal fired boilers that Fig. 1 provides for the utility model embodiment.
In figure: 1-raw material coal bunker; 2-rectangular star unloading machine; 3-steam fluidized bed dryer; 4-fluidization steam vapor air distribution plate; 5-electric precipitator, 6-secondary steam recovery system; 7-combined pyrolysis of coal device; 8-screw-type coal distributor; 9-fluidisation coal gas air distribution plate; 10-gas fired furnace; 11-smoke induced draught fan; 12-high temperature heat pipe heat exchanger; 13-built-in splitter; 14-oil gas purification system; 15-gas compressor; 16-semicoke delivery heat transfer device; 17-coal pulverizer.
Embodiment
For making the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with accompanying drawing, the utility model embodiment is described in further detail.
The preposition pyrolysis installation of feed coal for large coal fired boilers of the present utility model, its preferably embodiment be:
Comprise raw material coal bunker, the feed opening of described raw material coal bunker bottom is connected with the opening for feed at steam fluidized bed dryer top by rectangular star-like unloading machine, the discharge port of described steam fluidized bed dryer bottom is connected with the opening for feed at combined pyrolysis of coal device middle part by screw-type coal distributor, and the discharge port of described combined pyrolysis of coal bottom of device is connected with coal pulverizer by semicoke delivery heat transfer device;
The bottom of described steam fluidized bed dryer is provided with fluidization steam vapor air distribution plate, described fluidization steam vapor air distribution plate is connected with vapour line, the top of described steam fluidized bed dryer is provided with secondary steam outlet, described secondary steam outlet is connected with secondary steam recovery system by electric precipitator, and the steam outlet of described secondary steam recovery system is connected with described fluidization steam vapor air distribution plate;
Described combined pyrolysis of coal device bottom is provided with fluidisation coal gas air distribution plate, in described combined pyrolysis of coal device, middle part is provided with built-in splitter, described built-in splitter is many inlet cyclones, the aggregate bin top of described combined pyrolysis of coal bottom of device is located in the separating material outlet of described built-in splitter bottom, and the air outlet at described built-in splitter top is connected with described fluidisation coal gas air distribution plate by oil gas purification system, gas compressor, described semicoke delivery heat transfer device, high temperature heat pipe heat exchanger successively;
The hot exhanst gas outlet of gas fired furnace is connected with smoke induced draught fan by described high temperature heat pipe heat exchanger.
Described vapour line connects the low-grade vapour pipe of self-generating system.
The fuel gas inlet of described gas fired furnace connects the gas exit from described oil gas purification system.
The discharge port of described coal pulverizer is connected with Pulverized Fuel Boiler Furnace, and the dust mouth of described electric precipitator bottom is connected with the opening for feed of described coal pulverizer.
The utility model employing steam fluidized bed dryer, combined pyrolysis of coal device etc. are moisture to height, low-disintegration coal kind is dewatered and pyrolysis processing, and advantage is:
(1) Energy efficiency is high: because the utility model device and pulverized coal firing boiler heat power plant realize Poly-generation operation, described steam fluidized bed dryer fluidization steam vapor used directly adopts the low-grade steam after heat power plant's power generation system is done manual work, and has realized the cascade utilization of energy; And need not build again boiler house, save facility investment.
In the utility model device, adopt heat transfer efficiency high, compact construction, little high temperature heat pipe heat exchanger is damaged in fluid resistance, is conducive to improve system thermal efficiency, has reduced the consumption of fuel gas.The hot semicoke that described combined pyrolysis of coal device is discharged after described semicoke delivery heat transfer device is carried not only temperature reduce and adapted to the working conditions of described coal pulverizer, and the sensible heat that has reclaimed semicoke is conducive to energy-conservation.
(2) construction investment is low: described steam fluidized bed dryer and combined pyrolysis of coal device adopt fluidized-bed form, and its heat conduction efficiency is higher than other forms; Equipment volume is little, unit consumption of energy is little, floor space is few, need not build boiler house, cost saving again.
(3) environmental protection and economy: adopt non-pollution discharge in the moisture eliminator operational process that steam is medium; The secondary steam that described steam fluidized bed dryer is discharged after high-efficiency electric dust catcher filters, recoverable; Running cost is low.
(4) operating safety: adopt steam (rare gas element) as fluidizing medium by preferred arrangement power plant generating set, described steam fluidized bed dryer; The combustion gas that the required high temperature fluidized coal gas of described combined pyrolysis of coal device is carried by native system produces with heat-exchange system and does not have associated with heat and power system; The utility model device adopts above measure, makes it both meet power plant safety standard, meets again coal gas chemical industry standard, in service can presence of fire, explosion hazard.
The utility model compact construction, has reduced the height of described built-in splitter outlet conduit, is conducive to and being connected of follow-up equipment, and has reduced equipment manufacturing cost; Owing to adopting the coal gas cyclonic separator of many imports, dust-laden coal gas of high temperature is evenly entered from coal gas separator periphery, overcome single makeup of the imports form and caused air stream axle asymmetric, cause vortex core to depart from center, make to export the larger defect of tube short circuit stream.In addition, because the air motion entering in coal gas separator forms axially symmetric flow, the wearing and tearing in coal gas separator are greatly reduced, and separation efficiency is also improved; Described built-in splitter separates lower solid particulate matter can be in its outlet at bottom be transmitted back to the dust collecting box of described combined pyrolysis of coal device of described Gas Flow gasifying device bottom and avoided short circuit grey separation and saved the grey send-back device of the necessary separation of external separator and saved equipment manufacturing cost.The described built-in splitter that is arranged in pyrolysis installation middle part heats up in the time that pyrolysis installation starts together with pyrolysis installation, does not almost have heat to rise poor, does not need to arrange loop expansion pipe, saves equipment manufacturing cost.
Specific embodiment:
As shown in Figure 1, comprise raw material coal bunker 1, feed coal enters steam fluidized bed dryer 3 through raw material coal bunker 1 through rectangular star unloading machine 2, in steam fluidized bed dryer 3, be provided with fluidization steam vapor air distribution plate 4, the fluidization steam vapor of steam fluidized bed dryer 3 interior use carrys out the low-grade steam of discharging after self-generating system steam turbine is done manual work; The external electric precipitator 5 of secondary steam outlet pipe on steam fluidized bed dryer 3 tops, enters secondary steam recovery system 6 through the secondary steam of electric precipitator 5 dedustings and reclaims, recycles.
Send into combined pyrolysis of coal device 7 through screw-type coal distributor 8 through the feed coal that steam fluidized bed dryer 3 is dry again by the dumping device of its bottom; Dried feed coal is subject to coal gas of high temperature fluidisation, the concurrent heat-dissipating cracking of heating that fluidisation coal gas air distribution plate 9 is sent in combined pyrolysis of coal device 7; The raw gas of coal thermo-cracking output is sent into oil gas purification system 14 after the built-in splitter 13 on combined pyrolysis of coal device 7 tops is removed dust again, and raw gas is separated purified gas, tar and other Chemicals in oil gas purification system 14
A part for the purified gas of oil gas purification system output is drawn, after gas compressor 15 pressurizations, send in semicoke delivery heat transfer device 16 and carry out heat exchange intensification, make it become middle temperature coal gas; In this, warm coal gas is admitted to high temperature heat pipe heat exchanger 12 again and carries out after heat exchange is heated becoming coal gas of high temperature; This coal gas of high temperature is admitted to the fluidisation coal gas air distribution plate 9 that is loaded on combined pyrolysis of coal device 7 bottoms again and sprays, and coal grain is carried out to fluidisation.
The high-temperature medium that enters high temperature heat pipe heat exchanger 12 is that the portioned product purified gas of system produce is sent into the hot flue gas producing after gas fired furnace 10 burnings as fuel gas, and this hot flue gas enters atmosphere through smoke induced draught fan 11 after high temperature heat pipe heat exchanger 12 heat exchange, cooling.
Entering the hot semicoke outlet that coal hot semicoke of output after pyrolysis in combined pyrolysis of coal device 7 is admitted to combined pyrolysis of coal device 7 bottoms discharges, be admitted to again semicoke delivery heat transfer device 16, hot semicoke is lowered the temperature by heat exchange simultaneously in the process of semicoke delivery heat transfer device 16 interior conveyings, finally be admitted in coal pulverizer 17, coal pulverizer 17 is worn into fine coal by semicoke and is sent into Pulverized Fuel Boiler Furnace again.
The coal that specific embodiment is applicable:
Low order coal in being applicable to, as brown coal, long-flame coal etc.; Feed coal ash oontent≤15～20%; To sulphur content no requirement (NR); The feed coal of total moisture content < 50% can directly enter the preposition pyrolysis installation of described feed coal.
The operating parameter of the preposition pyrolysis installation of feed coal of the coal-powder boiler that specific embodiment provides:
(1) feed coal precrushing granularity: 0～5mm.
(2) required fluidization steam vapor parameter (air distribution plate ingress): 30kPa/150～200 ℃.
(3) total moisture content of dry rear coal :≤5～8%
(4) pyrolysis temperature of feed coal in combined pyrolysis of coal device 7: 420～460 ℃.
(5) the required fluidisation gas parameters of pyrolysis (air distribution plate ingress): 50kPa/700～750 ℃.
The product index of the preposition pyrolysis installation of feed coal of the coal-powder boiler that specific embodiment provides:
(1) in output semicoke, remain volatile content (V
daf) :≤10～15% (depending on coal).
(2) net calorific value of output semicoke: >=22.0～26.0MJ/kg (depending on coal).
(3) net calorific value of output coal gas:>=17.6～23.0MJ/Nm
3(depending on coal).
(4) gas yield of unit mass (after dry) coal: 70～85Nm
3/ t coal (depending on coal).
(5) tar yield of unit mass (after dry) coal: 50～105kg/t coal (depending on coal).
Concrete application example:
Take with domestic 350MW overcritical extraction condensing type thermoelectricity Steam Turbine and the 1110t/h level supercritical DC pulverized coal firing boiler supporting with it as example.The original design scheme of above-mentioned every pulverized coal firing boiler is to be provided with altogether 5 covers feed coal bucket 1 similar to Figure 1 and coal pulverizer 17.So, for the pulverized coal firing boiler of above-mentioned model, can apply the device of the same the utility model embodiment of 5 covers.Should only describe with 1 cover said apparatus by use-case:
In this application example, when the operation, be 33% left and right if use total moisture content with the polygenerations systeme of the supporting the utility model installation composition of the above-mentioned 1110t/h level of separate unit direct current pulverized coal firing boiler; Volatile matter (V
daf) content is 41% left and right; Certain brown coal coal that the Eastern Inner Mongolia that net calorific value is 15.2MJ/kg produces is feed coal, exert oneself on substantially constant basis at maintenance boiler original, system consumption of coal is 310t/h, increase closely 30% than independent cogeneration operation consumption of coal 220t/h, this increase part is consumed by polygenerations systeme has increased coal gas, tar and other byproducts.
As shown in Figure 1, when system works, high moisture low order feed coal, after the fluidized drying of steam fluidized bed dryer 3, enters before combined pyrolysis of coal device 7, and its total water is down to 6% left and right; The temperature of coal rises to approximately 120 ℃.This coal is subject to fluidisation, the heat exchange of the coal gas of high temperature of approximately 720 ℃ of left and right in combined pyrolysis of coal device 7, makes the pyrolysis temperature of coal reach 440 ℃ of left and right.The pyrolysis temperature of the utility model Raw coal in aforesaid combination moulded coal pyrolysis installation 7 is positioned below 460 ℃, belong to low temperature pyrogenation, compared with medium and high temperature pyrolysis, although the productive rate of the products such as output semicoke, coal gas and tar decreases, but the volatile content of its output semicoke is higher, is conducive to semicoke and burns in stove; Output caloric power of gas is higher; The lightweight oil ratio that in the tar of output, economic worth is higher is also high.
In order to obtain the interior required high temperature fluidized coal gas of combined pyrolysis of coal device 7, native system utilizes the part purified gas product of output to send into the interior burning of gas fired furnace 10 as fuel gas, the high warm flue gas of output.The warm flue gas of this height (tapping temperature is 1000～1050 ℃) is admitted to the hot junction part of high temperature heat pipe heat exchanger 12 and middle temperature coal gas that high temperature heat pipe heat exchanger 12 cold junctions are sent into carries out heat exchange, make its temperature be elevated to 700～750 ℃, then set it as high temperature fluidized medium and send into the fluidisation coal gas air distribution plate 9 interior ejections of combined pyrolysis of coal device 7.The hot flue gas of the hot junction part of high temperature heat pipe heat exchanger 12 is after heat exchange, and its outflow temperature is reduced to 160～170 ℃.
Purified gas, before entering high temperature heat pipe heat exchanger 12, is introduced into the hot semicoke that is 380 ℃ of left and right with the temperature of combined pyrolysis of coal device 7 outputs in semicoke delivery heat transfer device 16 and carries out heat exchange, makes purified gas temperature rise to 150 ℃ and becomes middle temperature coal gas.Hot semicoke is after 16 heat exchange of semicoke delivery heat transfer device, and temperature is reduced to 180～200 ℃.Semicoke after cooling is admitted to coal pulverizer 17 and wears into fine coal and be admitted to Pulverized Fuel Boiler Furnace again.Hot semicoke burns and produces steam in burner hearth, and steam drives supercritical pressure turbine+generator operation output electric power and heating power.
If by the annual operation of whole system 5500 hours, in system power generation and heat supply, every year can also output senior middle school calorific value of gas 13600 ten thousand steres (this coal gas most of use by oneself for native system); 120,000 tons of tar light oils are provided.Wherein one of tar light oil only, can increase approximately 500,000,000 yuan of incomes every year.
The utility model Processes and apparatus is simple, cheap; The online rate of processing unit is high, and running cost is lower than the polygenerations systeme that adopts circular fluid bed.
Adopt this utility model, be particularly advantageous in a lot of low-disintegration coal kinds of ground reserves such as utilizing China Inner Mongol, Xinjiang; Be conducive to directly utilize the fine coal that accounts for Coal Exploitation coal output and reach 30% left and right; Be conducive to the conversion on the spot of the coal of the vast central and west regions of China.
The above; it is only preferably embodiment of the utility model; but protection domain of the present utility model is not limited to this; any be familiar with those skilled in the art the utility model disclose technical scope in; the variation that can expect easily or replacement, within all should being encompassed in protection domain of the present utility model.Therefore, protection domain of the present utility model should be as the criterion with the protection domain of claims.
Claims (4)
1. the preposition pyrolysis installation of feed coal for large coal fired boilers, it is characterized in that, comprise raw material coal bunker, the feed opening of described raw material coal bunker bottom is connected with the opening for feed at steam fluidized bed dryer top by rectangular star-like unloading machine, the discharge port of described steam fluidized bed dryer bottom is connected with the opening for feed at combined pyrolysis of coal device middle part by screw-type coal distributor, and the discharge port of described combined pyrolysis of coal bottom of device is connected with coal pulverizer by semicoke delivery heat transfer device;
The bottom of described steam fluidized bed dryer is provided with fluidization steam vapor air distribution plate, described fluidization steam vapor air distribution plate is connected with vapour line, the top of described steam fluidized bed dryer is provided with secondary steam outlet, described secondary steam outlet is connected with secondary steam recovery system by electric precipitator, and the steam outlet of described secondary steam recovery system is connected with described fluidization steam vapor air distribution plate;
Described combined pyrolysis of coal device bottom is provided with fluidisation coal gas air distribution plate, in described combined pyrolysis of coal device, middle part is provided with built-in splitter, described built-in splitter is many inlet cyclones, the aggregate bin top of described combined pyrolysis of coal bottom of device is located in the separating material outlet of described built-in splitter bottom, and the air outlet at described built-in splitter top is connected with described fluidisation coal gas air distribution plate by oil gas purification system, gas compressor, described semicoke delivery heat transfer device, high temperature heat pipe heat exchanger successively;
The hot exhanst gas outlet of gas fired furnace is connected with smoke induced draught fan by described high temperature heat pipe heat exchanger.
2. the preposition pyrolysis installation of feed coal for large coal fired boilers according to claim 1, is characterized in that, described vapour line connects the low-grade vapour pipe of self-generating system.
3. the preposition pyrolysis installation of feed coal for large coal fired boilers according to claim 1, is characterized in that, the fuel gas inlet of described gas fired furnace connects the gas exit from described oil gas purification system.
4. the preposition pyrolysis installation of feed coal for large coal fired boilers according to claim 1, is characterized in that, the discharge port of described coal pulverizer is connected with Pulverized Fuel Boiler Furnace, and the dust mouth of described electric precipitator bottom is connected with the opening for feed of described coal pulverizer.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201320824654.7U CN203613150U (en) | 2013-12-13 | 2013-12-13 | Feed coal front-loading pyrolysis device used for large-scale pulverized coal furnace |
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| CN201320824654.7U CN203613150U (en) | 2013-12-13 | 2013-12-13 | Feed coal front-loading pyrolysis device used for large-scale pulverized coal furnace |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103666506A (en) * | 2013-12-13 | 2014-03-26 | 北京蓝天利源科技有限公司 | Feed coal pre-pyrolysis device for large-sized pulverized coal furnace |
| CN105255507A (en) * | 2015-10-23 | 2016-01-20 | 航天长征化学工程股份有限公司 | Direct heating type coal pyrolysis device |
| CN106439793A (en) * | 2016-11-22 | 2017-02-22 | 哈尔滨工业大学 | High-efficiency low-NOx staged coupling combustion method for inferior coal |
| CN108278595A (en) * | 2017-12-22 | 2018-07-13 | 清华大学 | A kind of coal dust deeply staged combustion method and system |
-
2013
- 2013-12-13 CN CN201320824654.7U patent/CN203613150U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103666506A (en) * | 2013-12-13 | 2014-03-26 | 北京蓝天利源科技有限公司 | Feed coal pre-pyrolysis device for large-sized pulverized coal furnace |
| CN105255507A (en) * | 2015-10-23 | 2016-01-20 | 航天长征化学工程股份有限公司 | Direct heating type coal pyrolysis device |
| CN106439793A (en) * | 2016-11-22 | 2017-02-22 | 哈尔滨工业大学 | High-efficiency low-NOx staged coupling combustion method for inferior coal |
| CN106439793B (en) * | 2016-11-22 | 2018-09-07 | 哈尔滨工业大学 | A kind of colm high efficency low NOx segmented couples combustion method |
| CN108278595A (en) * | 2017-12-22 | 2018-07-13 | 清华大学 | A kind of coal dust deeply staged combustion method and system |
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| GR01 | Patent grant | ||
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Denomination of utility model: Feed coal pre-pyrolysis device for large-sized pulverized coal furnace Effective date of registration: 20151221 Granted publication date: 20140528 Pledgee: Beijing Huafu Shenwu Industrial Furnace Co., Ltd. Pledgor: BEIJING LANTIAN LIYUAN SCIENCE AND TECHNOLOGY CO., LTD. Registration number: 2015990001136 |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140528 Termination date: 20191213 |