CN108592068A - A kind of waste heat using desulfurization slurry eliminates the system and technique that chimney emits white cigarette - Google Patents
A kind of waste heat using desulfurization slurry eliminates the system and technique that chimney emits white cigarette Download PDFInfo
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- CN108592068A CN108592068A CN201810560762.5A CN201810560762A CN108592068A CN 108592068 A CN108592068 A CN 108592068A CN 201810560762 A CN201810560762 A CN 201810560762A CN 108592068 A CN108592068 A CN 108592068A
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- desulfurizing tower
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- preheater
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J15/00—Arrangements of devices for treating smoke or fumes
- F23J15/02—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material
- F23J15/04—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material using washing fluids
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J15/00—Arrangements of devices for treating smoke or fumes
- F23J15/08—Arrangements of devices for treating smoke or fumes of heaters
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
- F23L15/00—Heating of air supplied for combustion
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J2215/00—Preventing emissions
- F23J2215/20—Sulfur; Compounds thereof
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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
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Treating Waste Gases (AREA)
- Chimneys And Flues (AREA)
Abstract
The invention discloses a kind of waste heats using desulfurization slurry to eliminate the system and technique that chimney emits white cigarette, including desulfurizing tower, steam air heater, high-temperature air preheater and low-temperature air preheater；The desulfurizing tower is connected with steam air heater, and the cold air of desulfurization slurry and steam air heater from desulfurizing tower exchanges heat, and the desulfurization slurry after temperature reduces returns to desulfurizing tower；The steam air heater is also connected with low-temperature air preheater, after the cold air of steam air heater is desulfurized slurries heating, into low-temperature air preheater；The low-temperature air preheater passes through the entrance of piping connection high-temperature air preheater, the outlet boiler and desulfurizing tower exhaust pass of the high-temperature air preheater；The most of high temperature air come out from high-temperature preheater supplies boiler through boiler hot-air duct, and oxygen is provided for fuel combustion；Other fraction high temperature airs enter desulfurizing tower exhaust pass, and are mixed with the wet flue gas from desulfurizing tower in flue, and chimney is avoided to emit white cigarette.
Description
Technical field
The invention belongs to flue gases purification field, more particularly to a kind of waste heat using desulfurization slurry eliminates power plant or work
Industry stove chimney emits the system and technique of white cigarette.
Background technology
Currently, generally using wet desulphurization on power plant and industrial furnace, although wet desulphurization has efficient, operation
Advantage at low cost, but its disadvantage is also evident from, for example, chimney emit the shortcomings that white cigarette (" plume ") phenomenon is the technology it
One, because flue gas is after wet desulfuration tower, contained humidity has reached saturation state, therefore when flue gas is arranged from chimney
Into atmospheric environment, when meeting with the lower air of ambient temperature, temperature reduces, and saturation vapor partial pressure power also drops therewith in flue gas
Low, moisture extra in this way will be precipitated, and form the phenomenon that chimney emits white cigarette, especially winter environment temperature is relatively low, in flue gas
The phenomenon that water droplet of condensation can be more, and chimney emits white cigarette are more apparent, and hangover is also longer.
Increasingly strict with environmental protection policy implementation dynamics, the phenomenon that various regions have begun to emit white cigarette to chimney, is controlled
Reason, it is desirable that city and its periphery power plant accomplish that flue gas eliminates qualified discharge after plume.
It includes being heated to flue gas to eliminate the most common method of plume, and reheating is either first condensed to flue gas or is adopted
Flue gas is diluted with hot-air.Above method is required to consume the additional energy, and needs several heat exchangers to complete
The problems such as above procedure, there is heat transmission equipment volumes greatly, energy consumption and operating cost are high, and heat transmission equipment running environment is severe,
The problems such as there are blocking and corrosion brings hidden danger for the safe operation of such equipment.
Invention content
Technical problem present in for the above-mentioned prior art, the object of the present invention is to provide a kind of using desulfurization slurry
Waste heat eliminates the system and technique that chimney emits white cigarette, while elimination chimney emits white cigarette, the waste heat of desulfurization slurry is recycled, not
In the case of influencing boiler operatiopn, the operating cost that plume eliminates system is greatly reduced, improves the safety of its operation.
Patent of the present invention the technical solution adopted is that：
The waste heat that the present invention provides a kind of using desulfurization slurry eliminates the system that chimney emits white cigarette, including desulfurizing tower, warm
Wind device, high-temperature air preheater and low-temperature air preheater；The desulfurizing tower is connected with steam air heater, the desulfurization from desulfurizing tower
The cold air of slurries and steam air heater exchanges heat, and the desulfurization slurry after temperature reduces returns to desulfurizing tower；The steam air heater also with
Low-temperature air preheater is connected, and after the cold air of steam air heater is desulfurized slurries heating, the Cryogenic air into boiler preheats
Device；The low-temperature air preheater connects high-temperature air preheater, the most of high temperature air warp come out from high-temperature preheater
Boiler hot-air duct supplies boiler, and oxygen is provided for fuel combustion；Other fraction high temperature airs enter desulfurizing tower outlet cigarette
Road, and mixed with the wet flue gas from desulfurizing tower in flue, avoid chimney from emitting white cigarette.
Further, the boiler smoke enters desulfurizing tower by deduster and air-introduced machine, in desulfurizing tower and desulfurization
Slurries are reacted, and realize the purpose of desulfurization；Meanwhile flue gas and desulfurization slurry contact heat-exchanging in desulfurizing tower, by desulfurization slurry
Heating.
The present invention also provides a kind of waste heats using desulfurization slurry to eliminate the technique that chimney emits white cigarette, from desulfurizing tower
Desulfurization slurry enters steam air heater, exchanges heat with cold air in the steam air heater, and the desulfurization slurry return after temperature reduces is de-
Sulphur tower completes the cycle of desulfurization slurry；After the cold air of steam air heater is desulfurized slurries heating, into the Cryogenic air of boiler
Then preheater enters high-temperature air preheater through being air connected pipeline；The most of high temperature air come out from high-temperature preheater
Boiler is supplied through boiler hot-air duct, provides oxygen for fuel combustion, other fraction high temperature airs enter desulfurizing tower outlet
Flue, and being mixed with the wet flue gas from desulfurizing tower in flue, using the low characteristic of the high water capacity of high temperature air temperature,
The temperature for improving flue gas reduces it with respect to moisture content, causes a deviation from the saturated humidity curve of wet flue gas, chimney is avoided to emit white cigarette.
It is further preferred that the temperature after the desulfurization slurry and steam air heater heat exchange reduces by 2~5 DEG C, excessive temperature drop
The heat exchanger area needed is larger, and system investments are higher.
It is further preferred that air temperature after steam air heater is increased to 20~35 DEG C, excessively high temperature will cause to warm up
Wind device is oversized, and air drag is consequently increased.
It is further preferred that air and desulfurization wastewater are countercurrent flow in the steam air heater, it is higher pre- to ensure to obtain
Hot air temperature, while reducing the volume of steam air heater.
It is further preferred that the material of the steam air heater uses resistant material.
It is further preferred that the resistant material uses fluoroplastics or stainless steel.
The present invention operation principle be：
Desulfurization slurry in desulfurizing tower to flue gas carry out desulfurization and with heat smoke contact heat-exchanging, temperature increase；Temperature is higher
Desulfurization slurry enter Boiler Air Heater's, carry out heat exchange with cold air, cold air heated, though air into air
It is preheated first before preheater.While heating cold air, desulfurization slurry temperature reduces；Desulfurization slurry after cooling sprays into
Desulfurizing tower, in the case where other conditions are constant, the flue-gas temperature of desulfurizing tower outlet will be with reduction, saturated steam partial pressure
Power also decreases, i.e., the absolute moisture content in flue gas is reduced, and desulfurizing tower exit gas temperature is reduced and containing wet to realize
The purpose of amount.For air preheater, inlet air temp raising will cause the reduction of its heat transfer temperature difference, heat output to reduce,
The air quantity of air preheater will be increased thus, although Wen Sheng of the air in air preheater in this way is reduced, due to sky
Tolerance increases, its caloric receptivity can be kept to be basically unchanged.And add into (exceed the required air capacity of boiler combustion), pass through
This part hot-air after air preheater heating is used to be mixed with the flue gas that desulfurizing tower exports, and on the one hand reaches in this way
The purpose of flue-gas temperature is improved, simultaneously because the water capacity of hot-air is far smaller than the water capacity for being saturated wet flue gas, to play
The purpose of dilution saturation wet flue gas.By the effect in terms of two above so that saturation of the flue gas of chimney breast far from wet flue gas
Moisture curve, to achieve the purpose that eliminate plume.
Since the heat of the hot-air of dilution comes from the heat of desulfurization slurry, for boiler, hot-air temperature
Spend constant, flow is constant, so the efficiency to boiler has no adverse effects；Therefore the operating cost of the system will decline to a great extent, from
And solve the financial burden that conventional plume technology for eliminating is brought to enterprise, there is good feasibility and economy.
Beneficial effects of the present invention are：
Waste heat recovery and plume elimination are combined together, on the one hand by recycling the heat of desulfurization slurry, reduce desulfurization
The moisture that tower exit gas temperature and flue gas carry, on the other hand the heat of recycling is empty using heat by steam air heater heating air
The high characteristic of gas water capacity low temperature, by the method blended with flue gas, improving the temperature of flue gas reduces it with respect to moisture content, makes
It deviates the saturated humidity curve of wet flue gas, and chimney is avoided to emit white cigarette.In this way in the case where not influencing boiler operatiopn, realize
Plume eliminates the low cost operation of system.Simultaneously as the mode that the heating of flue gas is directly blended using hot-air, avoids
The problem of caused flue gas heat-exchange unit blocks when heating flue gas using conventional flue gas heat-exchange unit is improving equipment operational safety
While property, reduce equipment investment, system is simpler.Furthermore due to the presence of steam air heater, improve air preheater
Entering air temperature avoids the low-temperature corrosion of air preheater.
The invention is particularly suited to carry out waste heat recovery to boiler of power plant or industrial furnace smoke evacuation and eliminate plume, pot is solved
The phenomenon that stove or industrial furnace chimney emit white cigarette.
Description of the drawings
The accompanying drawings which form a part of this application are used for providing further understanding of the present application, and the application's shows
Meaning property embodiment and its explanation do not constitute the improper restriction to the application for explaining the application.
Fig. 1 is the system schematic for eliminating the method that boiler and industrial furnace chimney emit white cigarette.
In figure：1, desulfurization slurry pumps, 2, air-introduced machine, 3, deduster, 4, steam air heater outlet water conduits, 5, steam air heater enter saliva
Pipeline, 6, pressure fan, 7, steam air heater entrance cold-air duct, 8, steam air heater, 9, steam air heater export hot-air duct, 10, low temperature
Air preheater, 11, air preheater connecting pipe, 12, high-temperature air preheater, 13, boiler high temperature air pipeline, 14, high
Warm dilution air pipeline, 15, desulfurizing tower, 16, desulfurizing tower exhaust pass, 17, chimney.
Specific implementation mode
It is noted that following detailed description is all illustrative, it is intended to provide further instruction to the application.Unless another
It indicates, all technical and scientific terms used herein has usual with the application person of an ordinary skill in the technical field
The identical meanings of understanding.
It should be noted that term used herein above is merely to describe specific implementation mode, and be not intended to restricted root
According to the illustrative embodiments of the application.As used herein, unless the context clearly indicates otherwise, otherwise singulative
It is also intended to include plural form, additionally, it should be understood that, when in the present specification using term "comprising" and/or " packet
Include " when, indicate existing characteristics, step, operation, device, component and/or combination thereof.
As background technology is introduced, it includes flue gas method, flue gas to eliminate the most common mode of plume at present mainly
Condensation+heating, hot-air dilution method etc..Above method is to consume the additional energy as cost, and there is heat transmission equipments
The problems such as volume is big, energy consumption and operating cost are high, especially boiler of power plant smoke evacuation exhaust gas volumn are big, are consumed required for heating flue gas
Energy is huge, and heat transmission equipment volume is big so that plume eliminates the investment of system and operating cost remains high, and is the environmental protection of enterprise
Work brings larger pressure, and in order to solve technical problem as above, present applicant proposes a kind of using more than desulfurization slurry
Heat eliminates the technique that chimney emits white cigarette.
In a kind of typical embodiment of the application, as shown in Figure 1, in the embodiment shown in fig. 1, it is a kind of using de-
The waste heat of sulphur slurries eliminates the technique that chimney emits white cigarette：Desulfurization slurry from desulfurizing tower enters steam air heater, in the steam air heater
Interior to exchange heat with cold air, the desulfurization slurry after temperature reduces returns to desulfurizing tower, completes the cycle of desulfurization slurry；By warm wind
After the cold air of device is desulfurized slurries heating, into the low-temperature air preheater of boiler, then enter height through being air connected pipeline
Warm air preheater；The most of high temperature air come out from high-temperature preheater supplies boiler through boiler hot-air duct, is fuel
Burning provides oxygen, and other fraction high temperature airs enter desulfurizing tower exhaust pass, and in flue with from the wet of desulfurizing tower
Flue gas is mixed, and using the low characteristic of the high water capacity of high temperature air temperature, improves the temperature of flue gas, and it is opposite containing wet to reduce it
Degree, causes a deviation from the saturated humidity curve of wet flue gas, chimney is avoided to emit white cigarette.
Waste heat recovery and plume elimination are combined together in the present invention, on the one hand by recycling the heat of desulfurization slurry,
The moisture that desulfurizing tower exit gas temperature and flue gas carry is reduced, on the other hand the heat of recycling heats air by steam air heater,
Using the high characteristic of hot-air water capacity low temperature, by the method blended with flue gas, improving the temperature of flue gas reduces it relatively
Moisture content causes a deviation from the saturated humidity curve of wet flue gas, chimney is avoided to emit white cigarette.In this way the case where not influencing boiler operatiopn
Under, realize the low cost operation that plume eliminates system.Simultaneously as what the heating of flue gas was directly blended using hot-air
Mode avoids the problem of flue gas heat-exchange unit caused when heating flue gas using conventional flue gas heat-exchange unit blocks, is set in raising
While standby safety in operation, reduce equipment investment, system is simpler.Furthermore due to the presence of steam air heater, improve sky
The entering air temperature of air preheater avoids the low-temperature corrosion of air preheater.
The invention is particularly suited to carry out waste heat recovery to boiler of power plant or industrial furnace smoke evacuation and eliminate plume, pot is solved
The phenomenon that stove or industrial furnace chimney emit white cigarette.
Specific implementing process is as follows：
Boiler smoke enters desulfurizing tower 15 by deduster 3 and air-introduced machine 2, is carried out instead with desulfurization slurry in desulfurizing tower
It answers, realizes the purpose of desulfurization；Meanwhile flue gas and desulfurization slurry contact heat-exchanging in desulfurizing tower, desulfurization slurry is heated.Carry out autospasy
The desulfurization slurry of sulphur tower 15 enters steam air heater 8 by desulfurization slurry pump 1 and steam air heater entrance waterpipe 5, in the steam air heater 8
It exchanges heat with the cold air from pressure fan 6, temperature takes off after reducing through the return desulfurizing tower of steam air heater outlet water conduits 4, completion
The cycle of sulphur slurries, and realize the dual purpose for reducing desulfurization slurry water temperature and heating cold air.Cold air is through pressure fan 6 and warms up
Wind device entrance cold-air duct 7 enters steam air heater 8, after being desulfurized slurries heating, enters through steam air heater outlet hot-air duct 9 low
Then warm air preheater 10 enters high-temperature air preheater 12 through air preheater connecting pipe 11.
The most of high temperature air come out from high-temperature preheater supplies boiler through boiler high temperature air pipeline 13, is fired for fuel
It burns and oxygen is provided, other fraction high temperature airs enter desulfurizing tower exhaust pass 16 through high temperature dilution air pipeline 14, and in cigarette
It is mixed with the wet flue gas from desulfurizing tower in road, using the low characteristic of the high water capacity of high temperature air temperature, improves flue gas
Temperature reduces it with respect to moisture content, causes a deviation from the saturated humidity curve of wet flue gas, chimney is avoided to emit white cigarette.Mixed cigarette
Pneumatic transmission enters chimney 17 and is discharged in atmospheric environment.
In addition, a kind of waste heat using desulfurization slurry provided by the present invention eliminates the system that chimney emits white cigarette, including it is de-
Sulphur tower 15, steam air heater 8, high-temperature air preheater 12 and low-temperature air preheater 10；The desulfurizing tower 15 and 8 phase of steam air heater
Even, the cold air of desulfurization slurry and steam air heater 8 from desulfurizing tower 15 exchanges heat, and the desulfurization slurry return after temperature reduces is de-
Sulphur tower；The steam air heater 8 is also connected with low-temperature air preheater 10, and slurries heating is desulfurized by the cold air of steam air heater
Afterwards, into low-temperature air preheater 10；The low-temperature air preheater 10 passes through piping connection high-temperature air preheater 12
Entrance, the outlet boiler and desulfurizing tower exhaust pass 16 of the high-temperature air preheater 12；It is come out from high-temperature preheater
Most of high temperature air through boiler hot-air duct supply boiler, provide oxygen for fuel combustion；Other fraction high temperature are empty
Gas enters desulfurizing tower exhaust pass, and is mixed with the wet flue gas from desulfurizing tower in flue, and chimney is avoided to emit white cigarette.Pot
Kiln gas enters desulfurizing tower by deduster and air-introduced machine, is reacted with desulfurization slurry in desulfurizing tower, realizes the mesh of desulfurization
's；Meanwhile flue gas and desulfurization slurry contact heat-exchanging in desulfurizing tower, desulfurization slurry is heated.
Further, in preferred embodiment, 45~60 DEG C of the temperature of the desulfurization slurry of steam air heater entrance, after steam air heater
The temperature of desulfurization slurry reduces by 2~5 DEG C；Air temperature after steam air heater is increased to 20~35 DEG C；Excessive temperature drop needs
Heat exchanger area it is larger, system investments are higher.
Further, in preferred embodiment, air and desulfurization slurry are countercurrent flow in the steam air heater；To ensure to obtain
Higher preheated air temperature, while reducing the volume of steam air heater.
Further, in preferred embodiment, the material of the steam air heater is using corrosion-resistant materials such as fluoroplastics or stainless steels
Material, to reduce the corrosion of desulfurization slurry heat exchanging device.
In the present invention desulfurization slurry in desulfurizing tower to flue gas carry out desulfurization and with heat smoke contact heat-exchanging, temperature increase；
The higher desulfurization slurry of temperature enters Boiler Air Heater's, carries out heat exchange with cold air, cold air is heated, and exists even if obtaining air
It is preheated first before into air preheater.While heating cold air, desulfurization slurry temperature reduces；Desulfurization after cooling
Slurries spray into desulfurizing tower, and in the case where other conditions are constant, the flue-gas temperature of desulfurizing tower outlet will be with reduction, saturated water
Vapor pressure also decreases, i.e., the absolute moisture content in flue gas is reduced, and desulfurizing tower exiting flue gas temperature is reduced to realize
The purpose of degree and water capacity.For air preheater, inlet air temp raising will lead to the reduction of its heat transfer temperature difference, heat transfer
Amount is reduced, and will increase the air quantity of air preheater thus, although Wen Sheng of the air in air preheater in this way is reduced,
Since air capacity increases, its caloric receptivity can be kept to be basically unchanged.And add into (exceed the required air of boiler combustion
Amount), this part hot-air after air preheater heats be used to be mixed with the flue gas that desulfurizing tower exports, such one
Aspect achievees the purpose that improve flue-gas temperature, simultaneously because the water capacity of hot-air is far smaller than the water capacity for being saturated wet flue gas,
To play the purpose of dilution saturation wet flue gas.By the effect in terms of two above so that the flue gas of chimney breast is far from wet cigarette
The saturated humidity curve of gas, to achieve the purpose that eliminate plume.
Since the heat of the hot-air of dilution comes from the heat of desulfurization slurry, for boiler, hot-air temperature
Spend constant, flow is constant, so the efficiency to boiler has no adverse effects；Therefore the operating cost of the system will decline to a great extent, from
And solve the financial burden that conventional plume technology for eliminating is brought to enterprise, there is good feasibility and economy.
The foregoing is merely the preferred embodiments of the application, are not intended to limit this application, for the skill of this field
For art personnel, the application can have various modifications and variations.Within the spirit and principles of this application, any made by repair
Change, equivalent replacement, improvement etc., should be included within the protection domain of the application.
Claims (8)
1. a kind of waste heat using desulfurization slurry eliminates the system that chimney emits white cigarette, which is characterized in that including desulfurizing tower, warm wind
Device, high-temperature air preheater and low-temperature air preheater；The desulfurizing tower is connected with steam air heater, the desulfurization slurry from desulfurizing tower
The cold air of liquid and steam air heater exchanges heat, and the desulfurization slurry after temperature reduces returns to desulfurizing tower；The steam air heater also with it is low
Warm air preheater is connected, after the cold air of steam air heater is desulfurized slurries heating, into low-temperature air preheater；Described
Low-temperature air preheater passes through the entrance of piping connection high-temperature air preheater, the outlet of the high-temperature air preheater
Boiler and desulfurizing tower exhaust pass；The most of high temperature air come out from high-temperature preheater supplies pot through boiler hot-air duct
Stove provides oxygen for fuel combustion；Other fraction high temperature airs enter desulfurizing tower exhaust pass, and in flue and carry out autospasy
The wet flue gas of sulphur tower is mixed, and chimney is avoided to emit white cigarette.
2. eliminating the system that chimney emits white cigarette using the waste heat of desulfurization slurry as described in claim 1, which is characterized in that described
Boiler smoke enter desulfurizing tower by deduster and air-introduced machine, reacted with desulfurization slurry in desulfurizing tower, realize desulfurization
Purpose；Meanwhile flue gas and desulfurization slurry contact heat-exchanging in desulfurizing tower, desulfurization slurry is heated.
3. a kind of waste heat using desulfurization slurry eliminates the technique that chimney emits white cigarette, which is characterized in that the desulfurization from desulfurizing tower
Slurries enter steam air heater, exchange heat with cold air in the steam air heater, and the desulfurization slurry after temperature reduces returns to desulfurizing tower,
Complete the cycle of desulfurization slurry；After the cold air of steam air heater is desulfurized slurries heating, the Cryogenic air into boiler preheats
Then device enters high-temperature air preheater through being air connected pipeline；The most of high temperature air come out from high-temperature preheater is through pot
Stove-heated air pipeline supplies boiler, and oxygen is provided for fuel combustion, and other fraction high temperature airs enter desulfurizing tower exhaust pass,
And mixed with the wet flue gas from desulfurizing tower in flue, using the low characteristic of the high water capacity of high temperature air temperature, improve
The temperature of flue gas reduces it with respect to moisture content, causes a deviation from the saturated humidity curve of wet flue gas, chimney is avoided to emit white cigarette.
4. a kind of waste heat using desulfurization slurry as described in claim 1 eliminates the technique that chimney emits white cigarette, which is characterized in that
Temperature after the desulfurization slurry and steam air heater heat exchange reduces by 2~5 DEG C.
5. a kind of waste heat using desulfurization slurry as described in claim 1 eliminates the technique that chimney emits white cigarette, which is characterized in that
Air temperature after steam air heater is increased to 20~35 DEG C.
6. a kind of waste heat using desulfurization slurry as described in claim 1 eliminates the technique that chimney emits white cigarette, which is characterized in that
Air and desulfurization wastewater are countercurrent flow in the steam air heater.
7. a kind of waste heat using desulfurization slurry as described in claim 1 eliminates the technique that chimney emits white cigarette, which is characterized in that
The material of the steam air heater uses resistant material.
8. a kind of waste heat using desulfurization slurry as claimed in claim 7 eliminates the technique that chimney emits white cigarette, which is characterized in that
The resistant material uses fluoroplastics or stainless steel.
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| CN109681905A (en) * | 2018-11-26 | 2019-04-26 | 浙江浙能技术研究院有限公司 | A kind of neat stress reheat system |
| CN109724099A (en) * | 2019-01-30 | 2019-05-07 | 江苏罗奈德流体科技有限公司 | A kind of white technique of boiler smoke qi exhaustion and device |
| CN110542111A (en) * | 2019-08-23 | 2019-12-06 | 山东泓奥电力科技有限公司 | Boiler low temperature flue gas treatment system |
| WO2020077679A1 (en) * | 2018-10-18 | 2020-04-23 | 南京工业大学 | Method for determining control line of white smoke plume after wet desulphurization |
| CN112628791A (en) * | 2020-12-11 | 2021-04-09 | 新疆天富环保科技有限公司 | System and method for preheating air supply of boiler by using desulfurization slurry |
| CN112675675A (en) * | 2020-12-11 | 2021-04-20 | 杭州蕴泽环境科技有限公司 | Desulfurization slurry waste heat recovery system and method |
| CN114031142A (en) * | 2021-11-30 | 2022-02-11 | 华能营口热电有限责任公司 | System for removing non-condensable gas by desulfurization slurry flash evaporation and working method thereof |
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2018
- 2018-05-25 CN CN201810560762.5A patent/CN108592068A/en not_active Withdrawn
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| CN109539290A (en) * | 2018-10-18 | 2019-03-29 | 山东神华山大能源环境有限公司 | A kind of boiler slag afterheat utilizing system and technique |
| WO2020077679A1 (en) * | 2018-10-18 | 2020-04-23 | 南京工业大学 | Method for determining control line of white smoke plume after wet desulphurization |
| US11520078B2 (en) * | 2018-10-18 | 2022-12-06 | Nanjing Tech University | Method for determining white plume control line of smoke after wet desulphurization |
| CN109681905A (en) * | 2018-11-26 | 2019-04-26 | 浙江浙能技术研究院有限公司 | A kind of neat stress reheat system |
| CN109724099A (en) * | 2019-01-30 | 2019-05-07 | 江苏罗奈德流体科技有限公司 | A kind of white technique of boiler smoke qi exhaustion and device |
| CN110542111A (en) * | 2019-08-23 | 2019-12-06 | 山东泓奥电力科技有限公司 | Boiler low temperature flue gas treatment system |
| CN112628791A (en) * | 2020-12-11 | 2021-04-09 | 新疆天富环保科技有限公司 | System and method for preheating air supply of boiler by using desulfurization slurry |
| CN112675675A (en) * | 2020-12-11 | 2021-04-20 | 杭州蕴泽环境科技有限公司 | Desulfurization slurry waste heat recovery system and method |
| CN114031142A (en) * | 2021-11-30 | 2022-02-11 | 华能营口热电有限责任公司 | System for removing non-condensable gas by desulfurization slurry flash evaporation and working method thereof |
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Application publication date: 20180928 |