CN208332300U - A kind of system emitting white cigarette using the waste heat elimination chimney of desulfurization slurry - Google Patents
A kind of system emitting white cigarette using the waste heat elimination chimney of desulfurization slurry Download PDFInfo
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- CN208332300U CN208332300U CN201820795102.0U CN201820795102U CN208332300U CN 208332300 U CN208332300 U CN 208332300U CN 201820795102 U CN201820795102 U CN 201820795102U CN 208332300 U CN208332300 U CN 208332300U
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- desulfurizing tower
- 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
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- Chimneys And Flues (AREA)
Abstract
The utility model discloses a kind of waste heats using desulfurization slurry to eliminate the system 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, provides oxygen for fuel combustion；Other fraction high temperature airs enter desulfurizing tower exhaust pass, and are mixed in flue with the wet flue gas from desulfurizing tower, and chimney is avoided to emit white cigarette.
Description
Technical field
The utility model belongs to flue gases purification field, in particular to a kind of waste heat using desulfurization slurry eliminates power plant
Or industrial furnace chimney emits the system of white cigarette.
Background technique
Currently, what is generallyd use on power plant and industrial furnace is wet desulphurization, although wet desulphurization has high-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 is reduced, 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 lower, in flue gas
The phenomenon that water droplet of condensation can be more, and chimney emits white cigarette are more obvious, and trail also longer.
Increasingly strict with environmental protection policy implementation dynamics, various regions have begun the phenomenon that emitting white cigarette to chimney and control
Reason, it is desirable that city and its periphery power plant accomplish that flue gas eliminates qualified discharge after plume.
Eliminating the most common method of plume includes heating to flue gas, and reheating is perhaps 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 exchange equipment volumes greatly, energy consumption and operating cost are high, and heat exchange equipment running environment is severe,
The problems such as there are blocking and corrosion brings hidden danger for the safe operation of such equipment.
Utility model content
For above-mentioned the technical problems existing in the prior art, starched the purpose of the utility model is to provide a kind of using desulfurization
The waste heat of liquid eliminates the system and technique that chimney emits white cigarette, while elimination chimney emits white cigarette, recycles the waste heat of desulfurization slurry,
In the case where not influencing boiler operatiopn, the operating cost that plume eliminates system is greatly reduced, improves the safety of its operation.
The utility model patent the technical solution adopted is that:
The utility model provides a kind of system that white cigarette is emitted using the waste heat elimination chimney of desulfurization slurry, including desulfurization
Tower, steam air heater, high-temperature air preheater and low-temperature air preheater；The desulfurizing tower is connected with steam air heater, comes from desulfurizing tower
Desulfurization slurry and the cold air of steam air heater exchange heat, the desulfurization slurry after temperature reduces returns to desulfurizing tower；The warm wind
Device is also connected with low-temperature air preheater, and after the cold air of steam air heater is desulfurized slurries heating, the low temperature into boiler is empty
Air preheater；The low-temperature air preheater connects high-temperature air preheater, the most of high temperature come out from high-temperature preheater
Air supplies boiler through boiler hot-air duct, provides oxygen for fuel combustion；Other fraction high temperature airs enter desulfurizing tower
Exhaust pass, and mixed in flue with the wet flue gas from desulfurizing tower, 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 the desulfurization slurry contact heat-exchanging in desulfurizing tower, by desulfurization slurry
Heating.
The utility model additionally provides a kind of technique that white cigarette is emitted using the waste heat elimination chimney of desulfurization slurry, comes from desulfurization
The desulfurization slurry of tower enters steam air heater, exchanges heat in the steam air heater with cold air, and the desulfurization slurry after temperature reduces returns
Desulfurizing tower is returned, the circulation of desulfurization slurry is completed；After the cold air of steam air heater is desulfurized slurries heating, into the low temperature of boiler
Then air preheater enters high-temperature air preheater through being air connected pipeline；The most of high temperature come out from high-temperature preheater
Air supplies boiler through boiler hot-air duct, provides oxygen for fuel combustion, other fraction high temperature airs enter desulfurizing tower
Exhaust pass, and mixed in flue with the wet flue gas from desulfurizing tower, it is low using the high water capacity of high temperature air temperature
Characteristic improves 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.
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 lead to warm
Wind device is oversized, and air drag is consequently increased.
It is further preferred that air and desulfurization wastewater are counterflow heat exchange in the steam air heater, it is higher pre- to guarantee 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 working principle of the utility model is:
Desulfurization slurry in desulfurizing tower to flue gas carry out desulfurization and with hot fume contact heat-exchanging, temperature increase；Temperature is higher
Desulfurization slurry enter Boiler Air Heater's, with cold air carry out heat exchange, cold air is heated, though air enter air
It is preheated first before preheater.While heating cold air, desulfurization slurry temperature is reduced；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, so that realizing reduces desulfurizing tower exit gas temperature and containing wet
The purpose of amount.For air preheater, inlet air temp raising will lead to the reduction of its heat transfer temperature difference, and heat output is reduced,
The air quantity of air preheater will be increased thus, although temperature rise of the air in air preheater in this way reduces, due to sky
Tolerance increases, its caloric receptivity can be kept to be basically unchanged.And (beyond air capacity required for boiler combustion), the process added
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.
Due to dilution hot-air heat from desulfurization slurry heat, 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 conventional plume technology for eliminating and give enterprise's bring financial burden, there is good feasibility and economy.
The utility model has the following beneficial effects:
Waste heat recycling and plume elimination are combined together, on the one hand by the heat of recycling desulfurization slurry, reduce desulfurization
The moisture that tower exit gas temperature and flue gas carry, on the other hand the heat of recycling heats air by steam air heater, empty using heat
The high characteristic of gas water capacity low temperature, by the method blended with flue gas, the temperature for improving flue gas reduces it with respect to moisture content, makes
Its saturated humidity curve for deviateing wet flue gas, avoids chimney from emitting white cigarette.In this way in the case where not influencing boiler operatiopn, realize
The low cost operation of plume elimination system.Simultaneously as the mode that the heating of flue gas is directly blended using hot-air, avoids
When using conventional flue gas heat-exchange unit heating flue gas the problem of caused flue gas heat-exchange unit blocking, equipment operational safety is being improved
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 utility model is particularly suitable for carrying out waste heat recycling to boiler of power plant or industrial furnace smoke evacuation and eliminating plume, solution
The phenomenon that certainly boiler or industrial furnace chimney emit white cigarette.
Detailed description of the invention
The accompanying drawings constituting a part of this application is used to provide further understanding of the present application, and the application's shows
Meaning property embodiment and its explanation are not constituted an undue limitation on the present 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 pump, 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 outlet 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, height
Warm dilution air pipeline, 15, desulfurizing tower, 16, desulfurizing tower exhaust pass, 17, chimney.
Specific embodiment
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 embodiment, 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 singular
Also it is 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 their combination.
As background technique is introduced, eliminating the most common mode of plume at present mainly includes flue gas method, flue gas
Condensation+heating, hot-air dilution method etc..Above method is to consume the additional energy as cost, and there is heat exchange 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, consume required for heating flue gas
Energy is huge, and heat exchange equipment volume is big, so that plume eliminates the investment of system and operating cost remains high, it is the environmental protection of enterprise
Work brings biggish 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: the 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 circulation 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 and 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 wet with respect to containing 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 recycling and plume elimination are combined together in the utility model, on the one hand pass through the heat of recycling desulfurization slurry
Amount reduces the moisture that desulfurizing tower exit gas temperature and flue gas carry, and on the other hand the heat of recycling is heated empty by steam air heater
Gas, using the high characteristic of hot-air water capacity low temperature, by the method blended with flue gas, the temperature for improving flue gas reduces its phase
To moisture content, the saturated humidity curve of wet flue gas is caused a deviation from, chimney is avoided to emit white cigarette.In this way in the feelings for not influencing boiler operatiopn
Under condition, the low cost operation that plume eliminates system is realized.Simultaneously as the heating of flue gas is directly blended using hot-air
Mode improved when avoiding using conventional flue gas heat-exchange unit heating flue gas the problem of caused flue gas heat-exchange unit blocking
While equipment safety in operation, reduce equipment investment, system is simpler.Furthermore it due to the presence of steam air heater, improves
The entering air temperature of air preheater avoids the low-temperature corrosion of air preheater.
The utility model is particularly suitable for carrying out waste heat recycling to boiler of power plant or industrial furnace smoke evacuation and eliminating plume, solution
The phenomenon that certainly boiler 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, carries out instead in desulfurizing tower with desulfurization slurry
It answers, realizes the purpose of desulfurization；Meanwhile flue gas and the 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, returns to desulfurizing tower through steam air heater outlet water conduits 4 after temperature reduction, complete de-
The circulation 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, fires 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 in road with the wet flue gas from desulfurizing tower, 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, the utility model provides a kind of system for emitting white cigarette using the waste heat elimination chimney of desulfurization slurry, packet
Include desulfurizing tower 15, steam air heater 8, high-temperature air preheater 12 and low-temperature air preheater 10；The desulfurizing tower 15 and steam air heater 8
It is connected, the cold air of desulfurization slurry and steam air heater 8 from desulfurizing tower 15 exchanges heat, and the desulfurization slurry after temperature reduces returns
Desulfurizing tower；The steam air heater 8 is also connected with low-temperature air preheater 10, is desulfurized slurries heating 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 in flue with the wet flue gas from desulfurizing tower, and chimney is avoided to emit white cigarette.Pot
Kiln gas enters desulfurizing tower by deduster and air-introduced machine, is reacted in desulfurizing tower with desulfurization slurry, realizes the mesh of desulfurization
's；Meanwhile flue gas and the 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 counterflow heat exchange in the steam air heater；To guarantee 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 utility model desulfurization slurry in desulfurizing tower to flue gas carry out desulfurization and with hot fume contact heat-exchanging, temperature liter
It is high；The higher desulfurization slurry of temperature enters Boiler Air Heater's, carries out heat exchange with cold air, cold air is heated, even if having leisure
Gas is preheated first before entering air preheater.While heating cold air, desulfurization slurry temperature is reduced；After cooling
Desulfurization slurry sprays into desulfurizing tower, and in the case where other conditions are constant, the flue-gas temperature of desulfurizing tower outlet will satisfy with reduction
It is also decreased with steam partial pressure, i.e., the absolute moisture content in flue gas is reduced, so that realizing reduces desulfurizing tower outlet cigarette
The purpose of temperature degree and water capacity.For air preheater, inlet air temp raising will lead to the reduction of its heat transfer temperature difference,
Heat output is reduced, and will increase the air quantity of air preheater thus, although temperature rise of the air in air preheater in this way reduces,
But since air capacity increases, its caloric receptivity can be kept to be basically unchanged.And that adds (exceeds sky required for boiler combustion
Tolerance), this part hot-air after air preheater heats be used to desulfurizing tower export flue gas mixed, in this way
On the one hand achieve the purpose that improve flue-gas temperature, simultaneously because containing for the water capacity of hot-air far smaller than saturation wet flue gas is wet
Amount, 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
The saturated humidity curve of flue gas, to achieve the purpose that eliminate plume.
Due to dilution hot-air heat from desulfurization slurry heat, 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 conventional plume technology for eliminating and give enterprise's bring financial burden, there is good feasibility and economy.
The foregoing is merely preferred embodiment of the present application, are not intended to limit this application, for the skill of this field
For art personnel, various changes and changes are possible in this application.Within the spirit and principles of this application, made any to repair
Change, equivalent replacement, improvement etc., should be included within the scope of protection of this application.
Claims (1)
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
Furnace 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.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820795102.0U CN208332300U (en) | 2018-05-25 | 2018-05-25 | A kind of system emitting white cigarette using the waste heat elimination chimney of desulfurization slurry |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820795102.0U CN208332300U (en) | 2018-05-25 | 2018-05-25 | A kind of system emitting white cigarette using the waste heat elimination chimney of desulfurization slurry |
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| Publication Number | Publication Date |
|---|---|
| CN208332300U true CN208332300U (en) | 2019-01-04 |
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ID=64775344
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| CN201820795102.0U Active CN208332300U (en) | 2018-05-25 | 2018-05-25 | A kind of system emitting white cigarette using the waste heat elimination chimney of desulfurization slurry |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113137624A (en) * | 2021-04-02 | 2021-07-20 | 武瑞香 | Energy-conserving device that utilizes of thermal power plant's wind cigarette system |
-
2018
- 2018-05-25 CN CN201820795102.0U patent/CN208332300U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113137624A (en) * | 2021-04-02 | 2021-07-20 | 武瑞香 | Energy-conserving device that utilizes of thermal power plant's wind cigarette system |
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