CN103776026B - A kind of device and method utilizing fume afterheat to reduce high-temperature corrosion of power station boiler - Google Patents
A kind of device and method utilizing fume afterheat to reduce high-temperature corrosion of power station boiler Download PDFInfo
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- CN103776026B CN103776026B CN201410034161.2A CN201410034161A CN103776026B CN 103776026 B CN103776026 B CN 103776026B CN 201410034161 A CN201410034161 A CN 201410034161A CN 103776026 B CN103776026 B CN 103776026B
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- air
- flue gas
- heat exchanger
- oil
- air preheater
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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
Abstract
The present invention discloses a kind of device and method utilizing fume afterheat to reduce high-temperature corrosion of power station boiler, and this device increases flue gas-air heat exchanger, indirect type air preheater, roots blower and corresponding flue gas and air pipe line newly.The method flow process is: flue gas was shunted a part and entered flue gas-air heat exchanger before entering air preheater, and all the other flue gases still enter air preheater and add heat primary air and Secondary Air; From the flue of the flue gas remittance air preheater outlet that flue gas-air heat exchanger is discharged, after two bursts of flue gases mixing, enter indirect type air preheater.Indirect type air heat exchanger is made up of flue gas-oil heat exchanger and air-oil heat exchanger, take conduction oil as the heat exchange that medium realizes flue gas and air indirectly.In flue gas-air heat exchanger by the air that heats as combustion air, enter burner hearth from the side walls at boiler-burner position, ensure that side walls combustion zone forms oxidizing atmosphere, reduce or alleviate the high temperature corrosion of side water wall.
Description
Technical field
The invention belongs to station boiler anticorrosion field, relate to a kind of fume afterheat that utilizes to reduce the device and method of high-temperature corrosion of power station boiler.
Background technology
Under cryogenic, the Fe in water-cooling wall pipe can be oxidized, but speed is very slow, and oxide is form compact and stable iron oxide, forms the protective layer preventing Fe to be oxidized further.The oxide of metallic iron may have different structures, wherein Fe
2o
3more stable, be combined tightr with pipe; Magnetic oxide Fe
3o
4(FeOFe
2o
3) slightly secondary, FeO is wherein more loose, easily comes off.In general, when tube temperature is below 300 DEG C, corrosion rate is very low.
The high temperature corrosion of furnace wall cooling is under the high temperature conditions, when the corrosive medium produced contacts with high-temperature water cold wall pipe, is become by the iron-based body of pipe and changes FeS into, or and then change FeO into during sulfurous fuels burning.These product quality are loosened, and can not stop the further reaction of iron-based body.Affect the factor of water wall high temperature corrosion, have atmosphere and flow field, the water-cooling wall temperature etc. of fuel quality (particularly coal-fired sulfur content, chlorinty etc.), stove combustion.Fuel sulfur-bearing is the key factor causing water-wall corrosion, and sulfur content is higher, and high temperature corrosion is more serious.There is the major reason that reducing atmosphere is water-cooling wall generation high temperature corrosion in stove or partial combustion district.Fluid field in furnace organizes the nearly wall burning of bad generation coal dust or coal dust to whitewash a wall can accelerate the high temperature corrosion of water-cooling wall.
Power station opposed firing arranges that the high temperature corrosion of boiler usually occurs on side water wall, and this is mainly because adopt turbulent burner when adopting front and back wall cross collocation, but First air non rotating.Therefore, when First air wind speed is larger, the First air of front-back wall can collision mutually, and cause breeze airflow to rush at side water wall, coal dust burns near side water wall, and temperature is higher and may wash away water-cooling wall, makes side water wall generation high temperature corrosion.
Reduce the speed of First air and be conducive to the stable of coal dust firing in stove, slightly can alleviate the high temperature corrosion of both walls simultaneously, but fundamentally can not solve the High Temperature Corrosion of this stove.The swirl strength increasing inner second air is conducive to catching fire in advance and smooth combustion of coal dust, increases inner second air amount and then can cause catch fire postponement and coal dust burn-off rate variation.For the high temperature corrosion of opposed firing boiler side water wall, the method for adherent wind can be adopted prevent.Increase at boiler side wall the temperature that adherent wind can reduce side water wall place, improve region reducing atmosphere and prevent coal dust from whitewashing a wall.Effectively can reduce the high temperature corrosion of side water wall.
Summary of the invention
Technical problem: the invention provides a kind of possibility, the gas energy of Appropriate application station boiler, the device utilizing fume afterheat reduction high-temperature corrosion of power station boiler of minimizing institute energy requirement input of trying one's best that reduce water-cooling wall of power boiler generation high temperature corrosion, provide a kind of fume afterheat that utilizes based on this device to reduce the method for high-temperature corrosion of power station boiler simultaneously.
Technical scheme: the fume afterheat that utilizes of the present invention reduces the device of high-temperature corrosion of power station boiler, comprise air preheater, the indirect type air preheater be connected with air preheater, with the flue gas-air heat exchanger of air preheater parallel connection, the blower fan that is connected with flue gas-air heat exchanger air intlet.
Indirect type air preheater comprises flue gas-oil heat exchanger, circulating pump, air-oil heat exchanger and expansion slot, and flue gas-oil heat exchanger heat conduction oil circuit is communicated with by circulating pump with the heat conduction oil circuit of air-oil heat exchanger, forms heat transfer oil circulation loop; Expansion slot is arranged on the thermal conductive oil pipeline after the heat conduction oil circuit outlet of flue gas-oil heat exchanger; Flue gas-oil heat exchanger is provided with gas approach and exhanst gas outlet, gas approach is communicated with the exhanst gas outlet of flue gas-air heat exchanger with air preheater simultaneously, air-oil heat exchanger is provided with air intlet and air outlet slit, air outlet slit is connected with the air intlet of air preheater.
The method utilizing fume afterheat to reduce high-temperature corrosion of power station boiler of the present invention, based on said apparatus, idiographic flow is:
The flue gas of discharging from economizer exhaust outlet is divided into two-way, and a road enters air preheater, and another road enters flue gas-air heat exchanger, and two-way flue gas is discharged through heat exchange, enters the flue gas-oil heat exchanger in indirect type air preheater, discharge after release heat after mixing.Conduction oil through circulating pump boosting conveying circulates in heat-exchanging loop; conduction oil heats up absorb the heat of flue gas in flue gas-oil heat exchanger after; enter release heat in air-oil heat exchanger; preheating is in advance carried out to First air and Secondary Air; expansion slot, as protective device, ensures the normal operation of heater in the situations such as startup, variable working condition.
First air and Secondary Air, after flue gas-oil heat exchanger shifts to an earlier date preheating, enter in air preheater after being heated to rated temperature and are delivered to burner hearth; Air is conveyed in flue gas-air heat exchanger by blower fan, after absorbing the heat of flue gas release, through delivering into burner hearth.
In the inventive method, air is conveyed in flue gas-air heat exchanger by blower fan, after absorbing the heat of flue gas release, enters burner hearth from the side wall at power station boiler burner position.This partial air enters burner hearth from side wall, as combustion air, ensures side walls combustion zone oxidizing atmosphere, reduces the possibility of side water wall generation high temperature corrosion.
Entrance First air and Secondary Air were introduced into air-oil heat exchanger before entering air preheater, and at air-oil heat exchanger place, conduction oil temperature is higher can heated inlet First air, Secondary Air, realized the preheating in advance of First air and Secondary Air.Conduction oil circulates between flue gas-oil heat exchanger and air-oil heat exchanger.Subsequently, First air and Secondary Air enter air preheater, are heated to rated temperature.First air and Secondary Air shift to an earlier date by the flue gas that temperature is lower the flue gas that preheating can displace temperature higher and are recycled.
When needing blower fan to provide more air, the exhaust gas volumn shunted before increasing air preheater, in order to ensure the constant of First air and Secondary Air temperature, can improve the rotating speed of circulating pump accordingly, improving the heat-transfer effect of indirect type air preheater; When needing the air provided to reduce, method is identical, reduces the exhaust gas volumn of shunting, and reduces the rotating speed of circulating pump, reduces the exchange capability of heat of indirect type air preheater.
First air and Secondary Air were shifted to an earlier date preheating by indirect type air preheater before entering air preheater, under the prerequisite that air preheater outlet First air and Secondary Air temperature remain unchanged substantially, the flue gas that temperature is higher can be displaced, realize the displacement of the energy of different grade; The energy cemented out adopts the mode of flue gas shunting to utilize, and this partial fume was shunted before entering air preheater, and flue-gas temperature is high, energy grade is high, the flue gas shunting out subsequently enters flue gas-air heat exchanger, heats the air provided by blower fan, and can be heated to higher temperature; Thus, both can ensure First air, Secondary Air had stationary temperature, the air of fume afterheat heating for reducing high-temperature corrosion in boiler of recovery can be utilized again.
Beneficial effect: the present invention compared with prior art, has the following advantages:
In the present invention, provide extra air by blower fan, heated in flue gas-air heat exchanger, enter burner hearth burner hearth from the side wall at power station boiler burner position afterwards.After entering burner hearth, this partial air, as combustion air, ensures side walls combustion zone oxidizing atmosphere, reduces the possibility of side water wall generation high temperature corrosion.This device adds indirect type air preheater, flue gas-air heat exchanger and blower fan and corresponding pipeline, and flue gas, air flow process are simple; In method of operating, need to shunt flue gas, method of operating is relatively simple, and apparatus and method simply effectively can realize the reduction of high temperature corrosion whereby.
The present invention adopts the good indirect type air preheater of heat-transfer effect to reduce exhaust gas temperature.From device, indirect type air preheater floor space is little, and heat-transfer effect is good; From method of operating, change circulating pump rotating speed rapidly convenient, variable parameter operation can be adapted to preferably.
In indirect type air preheater, owing to there is heat transfer temperature difference, conduction oil temperature, higher than entrance First air and Secondary Air, improves the wall surface temperature of flue gas-oil heat exchanger, effectively can reduce the possibility of flue gas-oil heat exchanger generation cold end corrosion.
First air and Secondary Air were shifted to an earlier date preheating by indirect type air preheater before entering air preheater, under the prerequisite that air preheater outlet First air and Secondary Air temperature remain unchanged substantially, the flue gas that temperature is higher can be displaced, realize the displacement of the energy of different grade; The energy cemented out adopts the mode of flue gas shunting to utilize, and this partial fume was shunted before entering air preheater, and flue-gas temperature is high, energy grade is high, the flue gas shunting out subsequently enters flue gas-air heat exchanger, heats the air provided by blower fan, and can be heated to higher temperature; Device and method of operating whereby, both can ensure First air, Secondary Air had stationary temperature, the fume afterheat heating of recovery can be utilized again for reducing the air of high-temperature corrosion in boiler, achieve the cascade utilization of energy.
This device can realize flexible indirect type air preheater and flue gas-air heat exchanger combine regulation mode, when needing blower fan to provide more air, the exhaust gas volumn shunted before increasing air preheater, in order to ensure the constant of First air and Secondary Air temperature, the rotating speed of circulating pump can be improved accordingly, improve the heat-transfer effect of indirect type air preheater; When needing the air provided to reduce, principle is identical, reduces the exhaust gas volumn of shunting, and reduces the rotating speed of circulating pump, reduces the exchange capability of heat of indirect type air preheater.
In addition, the heat heated required for the combustion air entering burner hearth from burner region side wall can be provided by fume afterheat.Apparatus and method can reduce exhaust gas temperature whereby, improve boiler energy utilization ratio; Reduce burner hearth high temperature corrosion, improve boiler safety.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Have in figure: burner hearth 1, flue gas-air heat exchanger 2, blower fan 3, flue gas-oil heat exchanger 4, circulating pump 5, air-oil heat exchanger 6, expansion slot 7, air preheater 8, air A, flue gas B, air C, flue gas D.
Detailed description of the invention
Below in conjunction with Figure of description and embodiment, the present invention is further described in detail.
Embodiment 1:
The fume afterheat that utilizes of the present invention reduces the device of high-temperature corrosion of power station boiler, comprise air preheater 8, the indirect type air preheater be connected with air preheater 8, with the flue gas-air heat exchanger 2 of air preheater 8 parallel connection, the blower fan 3 that is connected with the air intlet of flue gas-air heat exchanger 2.This device has increased indirect type air preheater, flue gas-air heat exchanger 2 and blower fan 3 and corresponding pipeline newly compared to former flue gas, air flow process.
Indirect type air preheater comprises flue gas-oil heat exchanger 4, circulating pump 5, air-oil heat exchanger 6 and expansion slot 7, and flue gas-oil heat exchanger 4 heat conduction oil circuit is communicated with by circulating pump 5 with the heat conduction oil circuit of air-oil heat exchanger 6, forms heat-exchanging loop; Thermal conductive oil pipeline after flue gas-oil heat exchanger is provided with expansion slot 7, expansion slot 7, as safety guard, ensures the safe operation of heater in the situations such as startup, variable working condition; Flue gas-oil heat exchanger is provided with gas approach and exhanst gas outlet, gas approach is communicated with the exhanst gas outlet of air preheater 8 with flue gas-air heat exchanger 2 simultaneously, air-oil heat exchanger 6 is provided with air intlet and air outlet slit, air outlet slit is connected with the air intlet of air preheater 8.
Two-way is divided into from the high-temperature flue gas of the flue gas about 360 DEG C of economizer exhaust outlet discharge, one tunnel enters air preheater 8, another road enters flue gas-air heat exchanger 2, the flue gas share entering flue gas-air heat exchanger 2 is approximately 17%, two-way flue gas is discharged through heat exchange, enter the flue gas-oil heat exchanger 4 in indirect type air preheater after mixing, discharge flue gas discharge temperature after release heat and be approximately 130 DEG C, the exhaust gas temperature compared to former about 150 DEG C have dropped 20 DEG C; Through circulating pump 5 in flue gas-oil heat exchanger, the heat transfer medium conduction oil of boosting absorbs the heat of flue gas, and heat up, high-temperature heat-conductive oil pipe line is connected with expansion slot 7, and high temperature heat conductive oil enters air-oil heat exchanger 6.
Its course of work is divided into following three aspects:
1) temperature-fall period of flue gas.Only lower the temperature different in air preheater from the flue gas of routine, flue gas cool-down process occurs in the indirect type air preheater at air preheater 8 in parallel and flue gas-air heat exchanger 2 and rear portion in the present invention.Flue gas D was split into two parts before entering air preheater 8, and the flue gas of about 17% enters gas-air heater 2, and all the other enter air preheater 8; The additional air and First air Secondary Air that are thered is provided by blower fan 3 are provided respectively, and reduce its outlet temperature of temperature and be respectively 240 DEG C and 190 DEG C.The flue gas of different temperatures is mixed into the flue gas-oil heat exchanger 4 in indirect type air preheater subsequently, and heating conduction oil, reduces the temperature to 130 DEG C, enter follow-up flue gas processing device subsequently.The installation of indirect type air preheater compensate for due to for adding heat primary air, that the amount of flue gas emission of Secondary Air reduces the heat release caused is not enough.
2) heating process of First air, Secondary Air.First the air that the external world is approximately 20 DEG C enters the air-oil heat exchanger 6 in indirect type air preheater respectively as First air, Secondary Air, absorb the heat of conduction oil release, realize preheating in advance, temperature reaches 75 DEG C, enter air preheater 8 subsequently, continue to be reached 310 DEG C by heating-up temperature.Indirect type air preheater adds the heat exchange area of flue gas and First air, Secondary Air, and heat transfer efficiency is higher, effectively can make up the deficiency of exhaust gas volumn, and First air, Secondary Air are heated to the assigned temperature meeting hearth combustion requirement.
3) heating process of the additional air provided by blower fan 3.The heat heated required for this partial air is provided by fume afterheat.General exhaust gas temperature is lower, can not by air heat to the temperature meeting hearth combustion requirement, therefore the method for energy replacement is adopted in the present invention, increase entrance First air, Secondary Air that the lower flue gas temperature of indirect type air preheater temperature is minimum, displace the flue gas that temperature is higher, the additional air that heating blower 3 provides in flue gas-air heat exchanger.
After above three processes, realize the reduction of exhaust gas temperature respectively, the heating of the additional air that the preheating of First air, Secondary Air and blower fan 3 provide.It is 310 DEG C that the First air that air preheater 8 exports and Secondary Air temperature remain unchanged substantially, and exhaust gas temperature is reduced to 130 DEG C by 150 DEG C.
The air provided by blower fan 3 enters burner hearth from side wall, as combustion air, ensures side walls combustion zone oxidizing atmosphere, reduces the possibility of side water wall generation high temperature corrosion.
Indirect type air preheater and flue gas-air heat exchanger combine regulation mode flexible, when needing blower fan 3 to provide more air, the exhaust gas volumn of shunting before increasing air preheater 8, in order to ensure the constant of First air and Secondary Air temperature, the rotating speed of circulating pump 5 can be improved accordingly, improve the heat-transfer effect of indirect type air preheater; When needing the air provided to reduce, method is identical, reduces the exhaust gas volumn of shunting, and reduces the rotating speed of circulating pump 5, reduces the exchange capability of heat of indirect type air preheater.
Embodiment 2:
Utilize fume afterheat to reduce the method for high-temperature corrosion of power station boiler, flue gas is discharged rear portion from economizer and is dividedly flowed into into flue gas-air heat exchanger 2, and another part enters air preheater 8.Enter the air of flue gas from blower fan 3 of flue gas-air heat exchanger 2.Flue gas discharges the flue after rear remittance air preheater 8 from flue gas-air heat exchanger 2.Flue gas enters the flue gas-oil heat exchanger 4 in indirect type air preheater subsequently, heating conduction oil.Conduction oil is driven by circulating pump 5, circulates between flue gas-oil heat exchanger 4 and air-oil heat exchanger 6.Conduction oil heat release in air-oil heat exchanger 6, improves the temperature of entrance First air and Secondary Air.Expansion slot 7, as safety device, ensures the normal operation of heater in the situations such as startup, variable working condition.
In order to reduce the high temperature corrosion of burner hearth, extra portion of air is provided by blower fan 3, this partial air enters flue gas-air heat exchanger 2 and absorbs shunting flue gas liberated heat, be heated to secondary air temperature or higher temperature, burner hearth is entered afterwards from tangentially firing boiler burner region, as combustion air, ensure burner region oxidizing atmosphere, reduce the possibility that high temperature corrosion occurs.
Claims (2)
1. the device utilizing fume afterheat to reduce high-temperature corrosion of power station boiler, it is characterized in that, this device comprises air preheater (8), the indirect type air preheater be connected with described air preheater (8), the flue gas-air heat exchanger (2) in parallel with air preheater (8), the blower fan (3) that is connected with described flue gas-air heat exchanger (2) air intlet;
Described indirect type air preheater comprises flue gas-oil heat exchanger (4), circulating pump (5), air-oil heat exchanger (6) and expansion slot (7), the heat conduction oil circuit of described flue gas-oil heat exchanger (4) is communicated with by circulating pump (5) with the heat conduction oil circuit of air-oil heat exchanger (6), form heat transfer oil circulation loop, described expansion slot (7) is arranged on the heat transfer oil circulation loop after the heat conduction oil circuit outlet of flue gas-oil heat exchanger (4); (4) are provided with gas approach and exhanst gas outlet to flue gas-oil heat exchanger, described gas approach is communicated with the exhanst gas outlet of air preheater (8) with flue gas-air heat exchanger (2) simultaneously, (6) are provided with air intlet and air outlet slit with air-oil heat exchanger, and described air outlet slit is connected with the air intlet of air preheater (8).
2. utilize fume afterheat to reduce a method for high-temperature corrosion of power station boiler, it is characterized in that, the method is based on device according to claim 1, and idiographic flow is:
The flue gas of discharging from economizer exhaust outlet is divided into two-way, one tunnel enters air preheater (8), and another road enters flue gas-air heat exchanger (2), and two-way flue gas is discharged through heat exchange, enter the flue gas-oil heat exchanger (4) in indirect type air preheater after mixing, discharge after release heat;
Conduction oil through circulating pump (5) boosting conveying circulates in heat-exchanging loop, conduction oil heats up absorb the heat of flue gas in flue gas-oil heat exchanger (4) after, enter release heat in air-oil heat exchanger, preheating is in advance carried out to First air and Secondary Air, expansion slot (7), as protective device, ensures the normal operation of heater in the situations such as startup, variable working condition;
Described First air and Secondary Air, after flue gas-oil heat exchanger (4) preheating in advance, enter after being heated to rated temperature in air preheater (8) and are delivered to burner hearth; Air is conveyed in flue gas-air heat exchanger (2) by blower fan (3), after absorbing the heat of flue gas release, through delivering into burner hearth.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410034161.2A CN103776026B (en) | 2014-01-24 | 2014-01-24 | A kind of device and method utilizing fume afterheat to reduce high-temperature corrosion of power station boiler |
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| CN201410034161.2A CN103776026B (en) | 2014-01-24 | 2014-01-24 | A kind of device and method utilizing fume afterheat to reduce high-temperature corrosion of power station boiler |
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| CN103776026A CN103776026A (en) | 2014-05-07 |
| CN103776026B true CN103776026B (en) | 2016-04-13 |
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| CN201410034161.2A Expired - Fee Related CN103776026B (en) | 2014-01-24 | 2014-01-24 | A kind of device and method utilizing fume afterheat to reduce high-temperature corrosion of power station boiler |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NO340554B1 (en) * | 2015-05-18 | 2017-05-08 | Goodtech Recovery Tech As | Heat recovery |
| CN106016340A (en) * | 2016-05-13 | 2016-10-12 | 神华集团有限责任公司 | Preheating device |
| CN110068010B (en) * | 2019-05-15 | 2024-03-29 | 河南省锅炉压力容器安全检测研究院 | Wall-attached wind adding device for side wall of front-back wall opposite-flow combustion boiler |
| CN110500609B (en) * | 2019-08-23 | 2021-05-04 | 润电能源科学技术有限公司 | Boiler waste heat utilization system |
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| WO2001027027A1 (en) * | 1999-10-12 | 2001-04-19 | Hera, Llc | METHOD AND APPARATUS FOR REDUCING 'AMMONIA SLIP' IN SCR AND/OR SNCR NOx REMOVAL APPLICATIONS |
| US6325003B1 (en) * | 1999-02-03 | 2001-12-04 | Clearstack Combustion Corporation | Low nitrogen oxides emissions from carbonaceous fuel combustion using three stages of oxidation |
| CN200972138Y (en) * | 2006-09-28 | 2007-11-07 | 无锡华光锅炉股份有限公司 | Two-way adjustable parallel box separation type air preheater |
| CN102705810A (en) * | 2012-06-15 | 2012-10-03 | 黄绍新 | Device for boiler flue gas waste heat utilization in thermal power unit |
| CN103234213A (en) * | 2013-04-27 | 2013-08-07 | 东南大学 | Method and device for utilizing oxygen-enriched combustion heat |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103134044B (en) * | 2013-03-25 | 2015-05-20 | 山东英电节能科技有限公司 | Method and device capable of improving efficiency of thermal power unit by cascade utilization of boiler smoke waste heat |
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- 2014-01-24 CN CN201410034161.2A patent/CN103776026B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6325003B1 (en) * | 1999-02-03 | 2001-12-04 | Clearstack Combustion Corporation | Low nitrogen oxides emissions from carbonaceous fuel combustion using three stages of oxidation |
| WO2001027027A1 (en) * | 1999-10-12 | 2001-04-19 | Hera, Llc | METHOD AND APPARATUS FOR REDUCING 'AMMONIA SLIP' IN SCR AND/OR SNCR NOx REMOVAL APPLICATIONS |
| CN200972138Y (en) * | 2006-09-28 | 2007-11-07 | 无锡华光锅炉股份有限公司 | Two-way adjustable parallel box separation type air preheater |
| CN102705810A (en) * | 2012-06-15 | 2012-10-03 | 黄绍新 | Device for boiler flue gas waste heat utilization in thermal power unit |
| CN103234213A (en) * | 2013-04-27 | 2013-08-07 | 东南大学 | Method and device for utilizing oxygen-enriched combustion heat |
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