CN207268458U - The system for preventing ammonium hydrogen sulfate from blocking air preheater after SCR denitration transformation - Google Patents
The system for preventing ammonium hydrogen sulfate from blocking air preheater after SCR denitration transformation Download PDFInfo
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- CN207268458U CN207268458U CN201720945360.8U CN201720945360U CN207268458U CN 207268458 U CN207268458 U CN 207268458U CN 201720945360 U CN201720945360 U CN 201720945360U CN 207268458 U CN207268458 U CN 207268458U
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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Abstract
It the utility model is related to the system for preventing ammonium hydrogen sulfate from blocking air preheater after a kind of SCR denitration transformation.Tthe utility model system, by cancelling cold section of heating surface area of traditional rotary regenerative air preheater, to improve air preheater entirety heating surface mean temperature, prevent air preheater ammonium hydrogen sulfate from blocking up ash, the low-pressure low-temperature economizer connected at the same time by being arranged in deduster to air-introduced machine in flue absorbs smoke discharging residual heat and controls exhaust gas temperature, improve unit economy, and installed in cold one, steam air heater on secondary air duct is realized to air preheater outlet heat one, the control of secondary air temperature, ensure on the premise of hot secondary air temperature slightly reduces, reduce heat primary air incorporation cold blast rate, reduce exhaust gas temperature, improve boiler efficiency.Ammonium hydrogen sulfate blocks rotary regenerative air preheater after the utility model can not only solve the problems, such as the transformation of coal-burning boiler SCR denitration, can also save net coal consumption rate 1.1g/kwh.
Description
Technical field
It the utility model is related to the system for preventing ammonium hydrogen sulfate from blocking air preheater after a kind of SCR denitration transformation.
Background technology
With increasingly harsh, selective catalytic reduction (SCR) conduct of coal-burning power plant's pollutant emission standard
Most effective removing gas pollutant NO industrial at presentXMethod, be now widely used among coal-fired power station boiler.SCR denitration
Technology is in catalyst vanadic anhydride (V2O5) under the action of, with NH3For reducing agent, by the NO in flue gasXIt is reduced into N2With
H2O.SCR denitration device is in flue before air preheater after boiler economizer.Only allow in SCR denitration Technology design
The ammonia escape amount of 3ppm, but due to not reliable ammonia escape amount control method in actual moving process, so mesh
It is preceding major part SCR denitration device all there are ammonia escape amount it is exceeded the problem of.
The ammonia of escape can be with SO a small amount of in flue gas3Reaction generation ammonium hydrogen sulfate (ABS), ABS adhesivenesses are very strong and have
It is corrosive, dew point is generally 200 DEG C.Gaseous ABS will not have an impact air preheater with flow of flue gas, but liquid
ABS there is extremely strong flying dust capturing ability, can be bonding with the fly ash granule in flue gas, be attached to Air Preheater Heating Surface
Upper formation dust stratification, so that the problems such as causing the corrosion of air preheater and stifled ash.It can not only increase after Ash Blocking in Air Preheater and draw
The power consumption of wind turbine, influences the economy of boiler movement, and violent boiler negative pressure fluctuation, primary air fan and air-supply will be also caused when serious
Machine stall, tack, for hypoxgia the problems such as, jeopardize unit safety operation.In addition, the catalyst V in SCR denitration device2O5May be used also
With by the SO in flue gas2It is converted into SO3, it has been further exacerbated by air preheater corrosion and has blocked up the possibility of ash.Pass through SCR at present
All there is similar situation substantially in improved power plant, therefore, after the transformation of coal-burning boiler SCR denitration, how to prevent hydrogen sulfate
Ammonium blocks air preheater becomes urgent problem to be solved.
After the transformation of boiler SCR denitration device, when air preheater corrodes and stifled grey problem occurs, usually not very well
Solution method.From boiler operatiopn angle, air preheater clogging-preventing measures mainly include：1. control as-fired coal sulphur content not exceeded,
Reduce SO in flue gas3Growing amount, reduces flue gas acid dew point；2. optimizing and revising spray ammonia system, ensure flue gas flow field and spray the equal of ammonia
Even property, reduces the escaping of ammonia rate；3. control SCR imports NOXContent, so as to avoid excessive spray ammonia.Although each power plant is in boiler operatiopn
In all taken into full account and take above-mentioned measure, but be still difficult to avoid that Ash Blocking in Air Preheater is asked in boiler actual motion
The appearance of topic.Slave device angle, air preheater was pre- to solve air by installing online soot blowing and water flushing device in recent years
Hot device blocks up grey problem.Operative practice shows：Soot blowing and water, which rinse, cannot all reach good ash-removal effect.It is to find out its cause, online
It is that interval puts into operation that soot blowing and water, which rinse, but when ABS bonds flying dust and is attached in Air Preheater Heating Surface, if cannot
Cleaning in time, dust stratification are difficult to be eliminated by lump is formed.Counter-measure is additionally included in air preheater gas approach installation recently
Alkaline dry powder spray gun, SO in flue gas is removed by neutralization reaction3, so as to prevent air preheater ABS from blocking up ash.It this method increase
The investment of unit and operating cost, to sacrifice unit economy as cost.
In view of above-mentioned, the designer is actively subject to research and innovation, and hydrogen sulfate is prevented to found after a kind of SCR denitration is transformed
The system that ammonium blocks air preheater, makes it with more the utility value in industry.
Utility model content
In order to solve the above technical problems, the purpose of this utility model, which is to provide one kind, is suitable for SCR nitre denitration transformation rear defence
Only ABS block rotary regenerative air preheater system, with solve in the prior art because SCR denitration transform after, cause ABS corrosion and
The defects of blocking air preheater
The system for preventing ammonium hydrogen sulfate from blocking air preheater after the transformation of the utility model SCR denitration, including：Along flue gas stream
The coal-burning boiler that is set gradually through direction, SCR denitration device, air preheater, deduster, low-pressure low-temperature economizer, air-introduced machine,
Chimney, wherein the air preheater includes air preheater high temperature section, the air preheater middle-temperature section being sequentially communicated, it is described
The outlet flue of SCR denitration device connects air preheater high temperature section import by air preheater import flue, and the air is pre-
Hot device high temperature section air outlet is also communicated with heat primary air road and hot secondary air duct, and the outlet flue of the air preheater middle-temperature section leads to
Cross air preheater exhaust pass connection deduster smoke inlet, the air preheater middle-temperature section air inlet be also communicated with it is cold once
Air passage and cold secondary air duct, are separately installed with First air steam air heater, Secondary Air steam air heater on a cold air passage and cold secondary air duct；
The flue-gas temperature of the exhaust pass of air preheater middle-temperature section is not less than 200 DEG C.
Further, the low-pressure low-temperature economizer and deduster reversing of position flue gas first pass through low-pressure low-temperature and save coal
Device, then exported by deduster, the outlet flue of the air preheater middle-temperature section is low by the connection of air preheater exhaust pass
Press low-level (stack-gas) economizer smoke inlet.
Further, the low-pressure low-temperature economizer includes ABS condensation sections and acid-proof dew section, the outlet of the acid-proof dew section
Flue-gas temperature is controlled at 80-90 DEG C.
Further, the ABS condensations section of the low-pressure low-temperature economizer uses steel-tube construction, and the material that ABS condenses section is adopted
Examined with High-Strength Low-Alloy and step on steel, surface plates enamel or equipped with silicon making coatings, the acid-proof dew section of the low-pressure low-temperature economizer
Using fin tube structure.
Further, the water side connection steamer pusher side heat regenerative system low-pressure heater of the low-pressure low-temperature economizer, low pressure
Low-level (stack-gas) economizer inlet water temperature is controlled 5 DEG C -10 DEG C on flue gas acid dew point temperature, the water inlet pipe of the low-pressure low-temperature economizer
Road is equipped with water pump.
Compared with prior art, prevent ammonium hydrogen sulfate from blocking air preheater and being after the transformation of the utility model SCR denitration
System has the following advantages：
ABS is liquid in 146 DEG C of -207 DEG C of temperature ranges, a height of gaseous state of temperature.Therefore the utility model is empty using improving
The method of air preheater heating surface temperature, to avoid condensations of the ABS in air preheater surfaces, so as to prevent ABS from bonding flying dust
Block air preheater.
(1) by cancelling the area of cold section of heating surface of air preheater, to prevent ABS in Air Preheater Heating Surface
Condense, since air preheater exhaust gas temperature is up to 200 DEG C -210 DEG C after cancelling cold section, so that air preheater integral wall
Face temperature can all be higher than ABS dew-point temperatures, so ABS will not condense on the heating surface of air preheater, can thoroughly solve
Because of the SO in the ammonia and flue gas of escape after SCR denitration transformation3React production ABS air preheater condense and caused by
The problems such as corrosion and blocking.
(2) by connecting the low-pressure low-temperature economizer in flue between deduster and air-introduced machine, to absorb smoke evacuation
Waste heat, after low-pressure low-temperature economizer, exhaust gas temperature can be reduced to 80 DEG C -90 DEG C, can save net coal consumption rate 0.7g/kwh.
After being arranged in deduster due to low-pressure low-temperature economizer, and corrosion protection design and material are employed, can keep from heat face appearance
Corrosion and clogging phenomenon caused by ABS condenses.
(3) low-pressure low-temperature economizer water side inlet and outlet can steamer pusher side heat regenerative system low-pressure heater and its pipeline it
Between select suitable point, so that condensation water can not only be made to obtain the waste heat energy of GOOD TASTE, low-pressure low-temperature economizer tube can also be made
Wall temperature is higher than flue gas acid dew point temperature, and due to being that flue gas exchanges heat with water in low-pressure low-temperature economizer, the coefficient of heat transfer is than empty
Air and flue gas heat exchange in air preheater is big, so low-pressure low-temperature economizer can be saved when recycling same flue gas heat
Heating surface area.
(4) on the premise of ensureing that hot secondary air temperature slightly reduces, heat primary air incorporation cold blast rate is reduced, makes cold one, two
Secondary wind, so that reaching reduces 5-10 DEG C of exhaust gas temperature, improves boiler effect more by boiler is entered after air preheater
Rate, can save net coal consumption rate 0.4g/kwh, at the same time, moreover it is possible in the case of boiler combustion colm, pass through the cold First air that puts into operation
Steam air heater on pipeline, so as to improve the requirement that heat primary air temperature meets pulverized coal preparation system drying capacity.
To sum up, ABS blocks swinging air preheat after the utility model can not only solve the transformation of coal-burning boiler SCR denitration
The problem of device, can also save net coal consumption rate 1.1g/kwh.
Described above is only the general introduction of technical solutions of the utility model, in order to better understand the skill of the utility model
Art means, and being practiced according to the content of specification, with the preferred embodiment of the utility model and coordinate attached drawing detailed below
Describe in detail bright as after.
Brief description of the drawings
Fig. 1 is to prevent ammonium hydrogen sulfate from blocking the embodiment 1 of the system of air preheater after the utility model SCR denitration is transformed
Schematic diagram；
Fig. 2 is to prevent ammonium hydrogen sulfate from blocking the embodiment 2 of the system of air preheater after the utility model SCR denitration is transformed
Schematic diagram；
Wherein, 1, coal-burning boiler, 2, SCR denitration device, 3, rotary regenerative air preheater high temperature section, 4, swinging air it is pre-
Hot device middle-temperature section, 5, heat primary air road, 6, hot secondary air duct, 7, air preheater import flue, 8, a cold air passage, 9, cold two
Secondary air passage, 10, air preheater exhaust pass, 11, deduster, 12, low-pressure low-temperature economizer, 13, air-introduced machine, 14, chimney,
15th, First air steam air heater, 16, Secondary Air steam air heater, 17, Steam Turbine Regenerative System low-pressure heater, 18, water pump.
Embodiment
With reference to the accompanying drawings and examples, specific embodiment of the present utility model is described in further detail.Below
Embodiment is used to illustrate the utility model, but is not intended to limit the scope of the present invention.
The utility model improves exhaust gas temperature by reducing the area of Air Preheater Heating Surface first, so as to solve sky
Air preheater ABS blocks up grey problem.Secondly, by connecting the low-pressure low-temperature economizer in flue installed in deduster to air-introduced machine,
The waste heat for absorbing smoke evacuation achievees the purpose that to control exhaust gas temperature, and after being arranged in deduster due to low-pressure low-temperature economizer, institute
Substantially avoided the appearance of heating surface clogging phenomenon.Finally, by arranging the steam air heater on cold first and second air passage, to realize
The control of hot first and second wind-warm syndrome is exported to air preheater, so as to meet boiler milling system drying capacity and Boiler Furnace internal combustion
The requirement of burning.
The air preheater ABS that the utility model can effectively prevent from bringing because SCR denitration device is transformed blocks up ash
Problem；By after deduster install low-pressure low-temperature economizer, not only can the face of keeping from heat block up ash, can also reduce boiler row
Smoke temperature degree, improves the economy of unit；Powder system processed can be reduced on the premise of the hot secondary air temperature of basic guarantee air preheater
System cold wind incorporation, improves boiler efficiency.
Embodiment 1
As shown in Figure 1, the system that ammonium hydrogen sulfate blocks air preheater is prevented after the transformation of the present embodiment SCR denitration, including：
It is low by coal-burning boiler 1, SCR denitration device 2, rotary regenerative air preheater, deduster 11, low pressure successively that direction is flowed through along flue gas
Warm economizer 12, air-introduced machine 13 and chimney 14.Rotary regenerative air preheater is by rotary regenerative air preheater high temperature section 3 and revolution
4 two sections of compositions of regenerative air heater middle-temperature section, rotary regenerative air preheater middle-temperature section 4 are equipped with air preheater exhaust pass 10
And a cold air passage 8 and cold secondary air duct 9, rotary regenerative air preheater high temperature section 3 are equipped with air preheater import flue 7
And heat primary air road 5 and hot secondary air duct 6.First air steam air heater is installed respectively on a cold air passage 8 and cold secondary air duct 9
15th, Secondary Air steam air heater 16.Air preheater import flue 7 is connected with SCR denitration device 2, air preheater exhaust pass
10 are connected with deduster 11.It is connected in deduster 11 with air-introduced machine 13 on flue and low-pressure low-temperature economizer 12 is set, it is cooled down
Medium is from Steam Turbine Regenerative System low-pressure heater 17.During operation, 7 flue-gas temperature of fume side air preheater import flue
For 340 DEG C -350 DEG C, 10 flue-gas temperature of exhaust pass is 200 DEG C -210 DEG C；12 input gas temperature of low-pressure low-temperature economizer is
190 DEG C -200 DEG C, exit gas temperature is 80 DEG C -90 DEG C.Air side works as boiler combustion colm, a cold air passage 8 and cold two
A steam air heater 15, secondary steam air heater 16 on secondary air passage 9 put into operation, and cold one, two into rotary regenerative air preheater middle-temperature section 4
Secondary air temperature is 40-50 DEG C, and air preheater outlet heat primary air road 5,6 wind-warm syndrome of hot secondary air duct are 270-280 DEG C.The system
Simple easy to implement, suitable newly constructed boiler, the transformation for active service boiler, construction is also simple, but is suitable for deduster and air-introduced machine
The boiler for having surplus is transformed.
In the present embodiment, after being arranged in deduster due to low-pressure low-temperature economizer, most flying dusts is divided in flue gas
From so substantially avoided heating surface there is the clogging caused by dust stratification.
Working method：The flue gas of coal-burning boiler output is successively by SCR denitration device, air preheater, deduster, low pressure
Low-level (stack-gas) economizer, air-introduced machine, chimney；
The air preheater installs steam air heater on a cold air passage.After Air Preheater Heating Surface is reduced, cold one
When secondary air passage steam air heater does not put into operation, heat primary air says one's intention as revealed in what one says temperature and can reach 230 DEG C -240 DEG C or so, therefore, in boiler combustion
During the relatively low coal of moisture, heat primary air can not have to mix cold wind, it is possible to meet pulverized coal preparation system drying capacity.But work as boiler
When burning low grade coal moisture is higher, air preheater cold one can be improved by opening the steam air heater installed on a cold air passage
Secondary air passage import wind-warm syndrome, so that improving heat primary air says one's intention as revealed in what one says temperature, reaches the requirement for meeting pulverized coal preparation system drying capacity.
Steam air heater is installed on the cold secondary air duct of the air preheater.After Air Preheater Heating Surface is reduced, cold two
When secondary air passage warm-air drier does not put into operation, hot secondary air duct outlet wind-warm syndrome can reach 240 DEG C or so.Hot secondary air temperature, which reduces, can influence pot
Combustion process in stove stove, therefore, need to open the steam air heater on cold secondary air duct, by improving cold secondary air duct import
Wind-warm syndrome, improves hot secondary air duct outlet wind-warm syndrome, so as to reduce the influence to burning in Boiler Furnace.
The low-pressure low-temperature economizer is arranged in deduster into the connection flue of air-introduced machine, and Bottomhole pressure is less than
The water of saturation temperature, comes from the low-pressure heater of Steam Turbine Regenerative System.Low-pressure low-temperature economizer is divided to two sections, is respectively high temperature
Section and low-temperature zone.High temperature section uses steel-tube construction, and wall surface temperature is less than ABS dew-point temperatures, condenses section for ABS.It is heated to improve
The anti-corrosion capability in face, material are examined using High-Strength Low-Alloy and step on steel, and surface plates enamel or uses silicon making coatings.Low-temperature zone is adopted
With fin tube structure, wall surface temperature is higher than flue gas acid dew point temperature, reveals section for acid-proof, material uses ordinary carbon steel.Operational process
In, by controlling low-pressure low-temperature economizer inlet water temperature 5 DEG C -10 DEG C on flue gas acid dew point temperature, to prevent that low-temperature zone is low
The generation of warm corrosion phenomenon.After being arranged in deduster due to low-pressure low-temperature economizer, most flying dusts is separated in flue gas,
So substantially avoided heating surface there is the clogging caused by dust stratification.Low-pressure low-temperature economizer exit flue-gas temperature controls
At 80-90 DEG C or so.
Embodiment 2
As shown in Fig. 2, ammonium hydrogen sulfate blocking air preheater is prevented after the transformation of the present embodiment the present embodiment SCR denitration is
System, including：It is low by coal-burning boiler 1, SCR denitration device 2, rotary regenerative air preheater, low pressure successively that direction is flowed through along flue gas
Warm economizer 12, deduster 11, air-introduced machine 13 and chimney 14.Rotary regenerative air preheater high temperature section 3 and swinging air are pre-
Hot 4 two sections of compositions of device middle-temperature section, rotary regenerative air preheater middle-temperature section 4 are equipped with air preheater exhaust pass 10 and cold one
Secondary air passage 8 and cold secondary air duct 9, rotary regenerative air preheater high temperature section 3 are equipped with air preheater import flue 7 and heat one
Secondary air passage 5 and hot secondary air duct 6.First air steam air heater 15, Secondary Air are installed respectively on a cold air passage 8 and cold secondary air duct 9
Steam air heater 16.Air preheater import flue 7 is connected with SCR denitration device 2, and air preheater exhaust pass 10 is low with low pressure
Warm economizer 12 is connected.It is connected in air preheater 3,4 with deduster 11 on flue and low-pressure low-temperature economizer 12 is set, its is cold
But medium is from Steam Turbine Regenerative System low-pressure heater 17.During operation, 7 flue gas temperature of fume side air preheater import flue
Spend for 340 DEG C -350 DEG C, 10 flue-gas temperature of exhaust pass is 200 DEG C -210 DEG C；12 input gas temperature of low-pressure low-temperature economizer
For 200 DEG C or so, exit gas temperature is 80 DEG C -90 DEG C.Air side works as boiler combustion colm, a cold air passage 8 and cold two
A steam air heater 15, secondary steam air heater 16 on secondary air passage 9 put into operation, into air preheater rotary regenerative air preheater middle-temperature section
4 cold first and second air temperature is 40-50 DEG C, and air preheater outlet heat primary air road 5,6 wind-warm syndrome of hot secondary air duct are 270-
280℃.The system low-voltage low-level (stack-gas) economizer 12 is arranged between air preheater 3,4 and deduster 11, can reduce dedusting
11 input gas temperature of device, improves 11 operational efficiency of deduster, is conducive to ensure the safe for operation of deduster 11, can also reduce
13 power consumption of air-introduced machine.But contain larger amount of flying dust in the flue gas due to entering low-pressure low-temperature economizer 12, so need to prevent low
12 high temperature section of low-level (stack-gas) economizer is pressed the clogging caused by dust stratification occur.The system high temperature section mainly by optimization design by
Hot face structure (flue gas flow rate between optimum option tube spacing and pipe), and double medium high-energy jet stream soot blowers are configured to solve to accumulate
Grey problem.The system is suitable for the transformation of active service boiler, and boiler change is smaller, and only need to increase low-pressure low-temperature economizer 12 constructs letter
Just.
Working method：The flue gas of coal-burning boiler output is saved by SCR denitration device, air preheater, low-pressure low-temperature successively
Coal device, deduster, air-introduced machine, chimney.Other method of works are same as Example 2, the difference is that only and have changed deduster
With the position of low-temp low-pressure economizer.
Traditional air preheater is mostly 3 sections, is respectively high, medium and low temperature section, ABS is generally in air preheater
The temperature range viscosity of low-temperature zone junction and low-temperature zone is very strong, easily bonds flying dust and blocks air preheater.In this patent
Air preheater cancels cold section of conventional air preheater, heat exchange element is changed to 2 sections, so that air preheater fume side
Outlet temperature is promoted to 205 DEG C or so.
The above is only the preferred embodiment of the utility model, is not intended to limit the present invention, it is noted that
For those skilled in the art, on the premise of the utility model technical principle is not departed from, can also do
Go out some improvement and modification, these improvements and modifications also should be regarded as the scope of protection of the utility model.
Claims (5)
1. the system that ammonium hydrogen sulfate blocks air preheater is prevented after a kind of SCR denitration transformation, it is characterised in that including：Along cigarette
Coal-burning boiler that air-flow is set gradually through direction, SCR denitration device, air preheater, deduster, low-pressure low-temperature economizer, draw
Wind turbine, chimney, wherein the air preheater includes air preheater high temperature section, the air preheater middle-temperature section being sequentially communicated,
The outlet flue of the SCR denitration device connects air preheater high temperature section import, the sky by air preheater import flue
Air preheater high temperature section air outlet is also communicated with heat primary air road and hot secondary air duct, the smoke of the air preheater middle-temperature section
Mouth connects deduster smoke inlet by air preheater exhaust pass, and the air preheater middle-temperature section air inlet is also communicated with cold
Air passage and cold secondary air duct, are separately installed with First air steam air heater on a cold air passage and cold secondary air duct, Secondary Air warms up
Wind device；The flue-gas temperature of the exhaust pass of air preheater middle-temperature section is not less than 200 DEG C.
2. the system that ammonium hydrogen sulfate blocks air preheater, its feature are prevented after SCR denitration transformation according to claim 1
It is, the low-pressure low-temperature economizer and deduster reversing of position flue gas first pass through low-pressure low-temperature economizer, then by dedusting
Device exports, the outlet flue of the air preheater middle-temperature section by air preheater exhaust pass connect low-pressure low-temperature economizer into
Mouth.
3. the system that ammonium hydrogen sulfate blocks air preheater is prevented after SCR denitration transformation according to claim 1 or 2, its
It is characterized in that, the low-pressure low-temperature economizer includes ABS and condenses section and acid-proof dew section, the exit gas temperature of the acid-proof dew section
Control is at 80-90 DEG C.
4. the system that ammonium hydrogen sulfate blocks air preheater, its feature are prevented after SCR denitration transformation according to claim 3
It is, the ABS of the low-pressure low-temperature economizer condenses section and uses steel-tube construction, and the material that ABS condenses section uses the low conjunction of high intensity
Jin Kaodeng steel, surface plate enamel or use finned tube knot equipped with silicon making coatings, the acid-proof dew section of the low-pressure low-temperature economizer
Structure.
5. the system that ammonium hydrogen sulfate blocks air preheater is prevented after SCR denitration transformation according to claim 1 or 2, its
It is characterized in that, the water side connection steamer pusher side heat regenerative system low-pressure heater of the low-pressure low-temperature economizer, low-pressure low-temperature saves coal
Device inlet water temperature is controlled 5 DEG C -10 DEG C on flue gas acid dew point temperature, and the inlet channel of the low-pressure low-temperature economizer is equipped with
Water pump.
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| CN107642793A (en) * | 2017-08-01 | 2018-01-30 | 中国大唐集团科学技术研究院有限公司华北分公司 | Prevent ammonium hydrogen sulfate from blocking the system and method for air preheater after SCR denitration transformation |
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| CN113237074A (en) * | 2021-04-29 | 2021-08-10 | 中建材创新科技研究院有限公司 | Heating system and denitration method thereof |
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| CN107642793A (en) * | 2017-08-01 | 2018-01-30 | 中国大唐集团科学技术研究院有限公司华北分公司 | Prevent ammonium hydrogen sulfate from blocking the system and method for air preheater after SCR denitration transformation |
| CN109442379A (en) * | 2018-10-09 | 2019-03-08 | 中国神华能源股份有限公司 | Flue gas waste heat recovery system and boiler system |
| CN110043918A (en) * | 2019-04-18 | 2019-07-23 | 中国大唐集团科学技术研究院有限公司华东电力试验研究院 | A kind of adjacent stove heating activation system with steam air heater |
| CN110043918B (en) * | 2019-04-18 | 2024-04-02 | 中国大唐集团科学技术研究院有限公司华东电力试验研究院 | Adjacent furnace heating starting system with air heater |
| CN113237074A (en) * | 2021-04-29 | 2021-08-10 | 中建材创新科技研究院有限公司 | Heating system and denitration method thereof |
| CN114321958A (en) * | 2022-01-04 | 2022-04-12 | 江苏峰业科技环保集团股份有限公司 | Boiler flue gas treatment system with low-temperature waste heat utilization air heater |
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