CN107381698A - Utilize the system and method for fume afterheat processing desulfurization wastewater - Google Patents
Utilize the system and method for fume afterheat processing desulfurization wastewater Download PDFInfo
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- CN107381698A CN107381698A CN201710674068.1A CN201710674068A CN107381698A CN 107381698 A CN107381698 A CN 107381698A CN 201710674068 A CN201710674068 A CN 201710674068A CN 107381698 A CN107381698 A CN 107381698A
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- flue
- desulfurization wastewater
- spray
- flue gas
- drying tower
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- 239000002351 wastewater Substances 0.000 title claims abstract description 106
- 238000006477 desulfuration reaction Methods 0.000 title claims abstract description 79
- 230000023556 desulfurization Effects 0.000 title claims abstract description 79
- 239000003517 fume Substances 0.000 title claims abstract description 29
- 238000000034 method Methods 0.000 title claims abstract description 23
- 238000012545 processing Methods 0.000 title description 9
- 239000003546 flue gas Substances 0.000 claims abstract description 58
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 57
- 239000007921 spray Substances 0.000 claims abstract description 45
- 238000001694 spray drying Methods 0.000 claims abstract description 40
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 38
- 230000003009 desulfurizing effect Effects 0.000 claims abstract description 17
- JEGUKCSWCFPDGT-UHFFFAOYSA-N h2o hydrate Chemical compound O.O JEGUKCSWCFPDGT-UHFFFAOYSA-N 0.000 claims abstract description 17
- 239000000779 smoke Substances 0.000 claims abstract description 17
- 239000007789 gas Substances 0.000 claims abstract description 11
- 239000000428 dust Substances 0.000 claims description 7
- 238000012546 transfer Methods 0.000 claims description 7
- 239000007788 liquid Substances 0.000 claims description 6
- 150000003839 salts Chemical class 0.000 claims description 5
- 230000005514 two-phase flow Effects 0.000 claims description 5
- 238000005507 spraying Methods 0.000 claims description 4
- 239000000284 extract Substances 0.000 claims description 2
- 239000002956 ash Substances 0.000 description 18
- 238000001704 evaporation Methods 0.000 description 16
- 238000001035 drying Methods 0.000 description 15
- 230000008020 evaporation Effects 0.000 description 15
- 230000008569 process Effects 0.000 description 8
- 238000005516 engineering process Methods 0.000 description 7
- 235000019504 cigarettes Nutrition 0.000 description 5
- 239000003344 environmental pollutant Substances 0.000 description 4
- 231100000719 pollutant Toxicity 0.000 description 4
- 239000005864 Sulphur Substances 0.000 description 3
- 238000000605 extraction Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 238000000889 atomisation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009388 chemical precipitation Methods 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 239000000460 chlorine Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000004033 diameter control Methods 0.000 description 1
- 239000010881 fly ash Substances 0.000 description 1
- 229910052602 gypsum Inorganic materials 0.000 description 1
- 239000010440 gypsum Substances 0.000 description 1
- 206010022000 influenza Diseases 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000002918 waste heat Substances 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
- 238000003911 water pollution Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
- C02F1/16—Treatment of water, waste water, or sewage by heating by distillation or evaporation using waste heat from other processes
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
- C02F1/043—Details
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
- C02F1/048—Purification of waste water by evaporation
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
- C02F1/10—Treatment of water, waste water, or sewage by heating by distillation or evaporation by direct contact with a particulate solid or with a fluid, as a heat transfer medium
- C02F1/12—Spray evaporation
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/101—Sulfur compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/18—Nature of the water, waste water, sewage or sludge to be treated from the purification of gaseous effluents
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Treating Waste Gases (AREA)
- Heat Treatment Of Water, Waste Water Or Sewage (AREA)
Abstract
The present invention relates to a kind of system and method that desulfurization wastewater is handled using fume afterheat, system includes：Receive the air preheater of flue gas, deduster, desulfurizing tower and spray drying tower, flue gas enters in air preheater through the first flue, the outlet flue of air preheater is connected with the smoke inlet of deduster by the second flue, flue gas in deduster is entered in desulfurizing tower by the 3rd flue, wherein, the smoke inlet of spray drying tower is connected by the 4th flue with the first flue, the exhanst gas outlet of spray drying tower is connected by the 5th flue with the second flue, the wastewater effluent mouth of desulfurizing tower is communicated with spray gun by the first waste water water pipe, first waste water water pipe is provided with the first water pump, first valve, the nozzle of spray gun connects the second flue, spray gun is connected with air compressor, the wastewater effluent mouth of desulfurizing tower connects the water inlet of spray drying tower by the first waste water water pipe, second waste water water pipe is provided with the second water pump, second valve.
Description
Technical field
The present invention relates to thermal power plant desulfurization wastewater terminal processes field, more particularly to one kind using more than tail flue gas
It is heat-treated the system and method for desulfurization wastewater.
Background technology
Overwhelming majority power plant of China is using the SO in Limestone-gypsum Wet Flue Gas Desulfurization Process technology removing flue gas2.To remain de-
Chlorine balance or other ionic equilibriums in sulphur tower, can outwards discharge a certain amount of desulfurization wastewater in actual motion.Desulfurization wastewater
Complicated component, pollutant kind are more, are one of most intractable waste water in coal-burning power plant.The country mainly uses chemical precipitation method at present
Desulfurization wastewater is handled, the still soluble solid containing high concentration in the waste water after processing, mainly including chloride etc., it is difficult to time
With typically taking the method directly discharged to dispose.But directly easily cause secondary pollution after discharge.With water pollution control skill
The progress of art and the increasingly raising of pollutant emission standard, this method are limited in following wastewater treatment.
Recent study generates a kind of new technology using fume afterheat evaporation drying desulfurization wastewater.Using double-head spray
Mouth, the flue that will be sprayed into after the compressed air atomizing of desulfurization wastewater between air preheater and electric cleaner, makes to give up using heat smoke
Water evaporating completely, the pollutant in waste water is converted into the solids such as crystal or salt, with the flying dust in flue gas by electric precipitation
Device is collected, so as to remove pollutant and realize the zero-emission of waste water.What the technology overcame traditional chemical sedimentation is
It is under unified central planning to install the shortcomings of standby more, investment is big, operating cost height and equipment repair and maintenance amount is big, the reduction of flue-gas temperature and wet in addition
The increase of degree is also beneficial to reduce fly ash resistivity, improves the efficiency of electric cleaner.However, the technology is still deposited in actual motion
In some drawbacks.To avoid that downstream flue and deduster are caused to corrode, the technology requires higher to flue-gas temperature, it is necessary to protects
Card flue gas is higher than 5 DEG C or so of flue gas acid dew point with the temperature after the heat exchange of desulfurization wastewater droplet.Therefore, when because unit load is relatively low or
Operation level is poor etc. when causing the cigarette temperature after air preheater relatively low, and desulfurization wastewater must suspend penetrating, will now produce desulfurization wastewater
The problem that can not be handled.In addition, for avoid desulfurization wastewater droplet evaporate in flue it is incomplete caused by downstream flue and dedusting
The fouling and corrosion of device, the desulfurization wastewater amount of this technical finesse is than relatively limited, and a 300MW units oepration at full load is per hour
Maximum can handle 3-4.5 ton desulfurization wastewaters.When power plant desulfurization wastewater discharge capacity is larger, waste heat smoke evaporative technology in flue
Face the problem of disposal ability deficiency.
In view of it is above-mentioned the defects of, the design people is actively subject to research and innovation, a kind of using at fume afterheat to found
The system and method for desulfurization wastewater is managed, makes it with more the value in industry.
The content of the invention
Given up in order to solve the above technical problems, solving fume afterheat it is an object of the invention to provide one kind and drying evaporation desulfurization
The system and method that desulfurization wastewater is handled using fume afterheat for the problem of underload of hydraulic art exits.
The system that the present invention handles desulfurization wastewater using fume afterheat, including：Receive the air preheater of flue gas, deduster, de-
Sulphur tower and spray drying tower, flue gas enter in the air preheater through the first flue, and the outlet flue of the air preheater removes with described
The smoke inlet of dirt device is connected by the second flue, and the flue gas in deduster is entered in desulfurizing tower by the 3rd flue, wherein, institute
The smoke inlet for stating spray drying tower is connected by the 4th flue with the first flue, and the exhanst gas outlet of spray drying tower passes through
Five flues are connected with the second flue, and the wastewater effluent mouth of the desulfurizing tower is communicated with spray gun by the first waste water water pipe, described
First waste water water pipe is provided with the first water pump, the first valve, and the nozzle of the spray gun connects the second flue, and the spray gun is connected with
Air compressor, the wastewater effluent mouth of the desulfurizing tower connects the water inlet of spray drying tower by the first waste water water pipe, described
Second waste water water pipe is provided with the second water pump, the second valve.
Further, the exiting flue gas of spray drying tower is led back in the second flue by the 5th flue, specifically leads back position
The front portion of the nozzle location of spray gun in the second flue, apart from more than 10 meters of the position of nozzle.
Further, the nozzle of the spray gun is gas-liquid two-phase flow nozzle.
Further, the heat transfer form in spray drying tower includes downstream heat transfer and countercurrent flow.
Further, spray dryer bottom is provided with drier ash bucket, and the drier ash bucket outlet removes with deduster
Dirt ash bucket connects.
Further, the direction of the nozzle ejection water smoke of spray gun is vertical with flow of flue gas direction.
The present invention is given up using the method for fume afterheat processing desulfurization wastewater using above-mentioned using fume afterheat processing desulfurization
The system of water carries out the following two kinds mode and desulfurization wastewater is dried：
Mode one：Desulfurization wastewater is drawn into spray gun by the first water pump, and air compressor output squeezing air gives up desulfurization
Water is dispersed as droplet and sprayed into the second flue that desulfurization wastewater is dried using flue gas；
Mode two：Partial fume is extracted from the first flue, flue gas is sent into spray drying tower, desulfurization wastewater is through the
Two waste water water pipes are exchanged heat into spray drying tower with flue gas, and vapor evaporates after heat exchange enters flue gas by the 5th flue
In, salt analyzes to be entered in the dry device ash bucket of spray dryer bottom with the flying dust cohesion in flue gas and part afterwards, the drying
The outlet of device ash bucket connects with the dedusting ash bucket of deduster；
Mode one, two respective independent operating of mode, do not interfere with each other.
Further, the average grain diameter for the water smoke that the nozzle of spray gun sprays is controlled at 50 μm to 70 μm.
Further, the exhaust gas volumn extracted from the first flue is within the 2% of total exhaust gas volumn.
By such scheme, the present invention at least has following excellent using the system and method for fume afterheat processing desulfurization wastewater
Point：
Realize that desulfurization wastewater can both utilize the fume afterheat evaporation drying after air preheater in flue, again can be in flue
The high-temperature flue gas evaporation drying before air preheater is utilized in outer spray drying tower.Two processes can with any switching laws, independent operating,
And it can run simultaneously.
When effectively solving unit underload or bad operation conditions, desulfurization wastewater can not be handled because flue-gas temperature is too low
Problem.
Desulfurization wastewater is realized in flue and in spray drying tower while evaporation is dried, separate unit machine can be significantly improved
The desulfurization wastewater disposal ability of group.
When spray drying tower can not put into operation, by extracting the high-temperature flue gas before the air preheater of part and adding to empty pre-
In flue after device, the flue-gas temperature after air preheater is improved, it is final to realize the processing for improving desulfurization wastewater spray evaporation in flue
Ability and solve the problems, such as that desulfurization wastewater vaporising device can not be run because cigarette temperature is too low after air preheater.
Described above is only the general introduction of technical solution of the present invention, in order to better understand the technological means of the present invention,
And can be practiced according to the content of specification, below with presently preferred embodiments of the present invention and coordinate accompanying drawing describe in detail as after.
Brief description of the drawings
Fig. 1 is structural representation of the present invention using the system of fume afterheat processing desulfurization wastewater；
1 boiler body；2 air preheaters；3 dedusters；4 desulfurizing towers；5 chimneys；6 spray drying towers；7 air compressors；8
One water pump；9 second water pumps；10 first valves；11 second valves.
Embodiment
With reference to the accompanying drawings and examples, the embodiment of the present invention is described in further detail.Implement below
Example is used to illustrate the present invention, but is not limited to the scope of the present invention.
Referring to Fig. 1, a kind of system that desulfurization wastewater is handled using fume afterheat described in a preferred embodiment of the present invention, connect
Air preheater 2, deduster 3, desulfurizing tower 4 and spray drying tower 6 that boiler 1 exports flue gas are received, flue gas enters institute through the first flue
State in air preheater, the outlet flue of the air preheater is connected with the smoke inlet of the deduster by the second flue, in deduster
Flue gas entered by the 3rd flue in desulfurizing tower, the flue gas of desulfurizing tower output is discharged by chimney 5, wherein, the spraying is dry
The smoke inlet of dry tower is connected by the 4th flue with the first flue, the exhanst gas outlet of spray drying tower by the 5th flue with
Second flue is connected, and the wastewater effluent mouth of the desulfurizing tower is communicated with spray gun, first waste water by the first waste water water pipe
Water pipe is provided with the first water pump, the first valve, and the nozzle of the spray gun connects the second flue, and the spray gun is connected with air compression
Machine 7, the wastewater effluent mouth of the desulfurizing tower connect the water inlet of spray drying tower, second waste water by the first waste water water pipe
Water pipe is provided with the second water pump, the second valve.
Further, the exiting flue gas of spray drying tower is led back in the second flue by the 5th flue, specifically leads back position
The front portion of the nozzle location of spray gun in the second flue, apart from more than 10 meters of the position of nozzle.The nozzle of the spray gun is gas-liquid
Two-phase flow nozzle.Heat transfer form in spray drying tower includes downstream heat transfer and countercurrent flow.Spray dryer bottom is provided with dry
Dry device ash bucket, the drier ash bucket outlet connect with the dedusting ash bucket of deduster.The nozzle of spray gun spray the direction of water smoke with
Flow of flue gas direction is vertical.
In the present embodiment, desulfurization wastewater evaporation drying device, profit are set between thermal power plant air preheater and deduster
Desulfurization wastewater is extracted with water pump, and drying is evaporated into the device and in flue.Meanwhile set outside flue a set of de-
Sulphur waste water spray drying tower, extract the high-temperature flue gas before air preheater and the waste water droplet after atomization is evaporated, the cigarette after heat exchange
Gas is led back in the flue before deduster.
Some spray guns are installed in the flue between thermal power plant air preheater and deduster, one group of gas is opened up on spray gun
Liquid two-phase nozzle, sets an air compressor and the first water pump, and desulfurization wastewater is drawn into spray gun simultaneously quilt by the first water pump
Compressed air is dispersed as droplet and sprayed into flue.Meanwhile a spray drying tower and the second water pump are set near deduster,
Part of smoke is drawn by pipeline before air preheater and enters drying tower, desulfurization wastewater is sprayed into drying tower by nozzle, made
Flue gas fully dries evaporation desulfurization wastewater droplet, and the flue gas after heat exchange is led back by pipeline in the flue before deduster.Drying tower
Bottom sets ash bucket, and ash bucket outlet connects with dust collector ash hopper.
A kind of method that desulfurization wastewater is handled using fume afterheat described in a preferred embodiment of the present invention, using above-mentioned
The following two kinds mode is carried out using the system of fume afterheat processing desulfurization wastewater desulfurization wastewater is dried：
Mode one：Desulfurization wastewater is drawn into spray gun by the first water pump, and air compressor output squeezing air gives up desulfurization
Water is dispersed as droplet and sprayed into the second flue that desulfurization wastewater is dried using flue gas；
Mode two：Partial fume is extracted from the first flue, flue gas is sent into spray drying tower, desulfurization wastewater is through the
Two waste water water pipes are exchanged heat into spray drying tower with flue gas, and vapor evaporates after heat exchange enters flue gas by the 5th flue
In, salt analyzes to be entered in the dry device ash bucket of spray dryer bottom with the flying dust cohesion in flue gas and part afterwards, the drying
The outlet of device ash bucket connects with the dedusting ash bucket of deduster；
Mode one, two respective independent operating of mode, do not interfere with each other.
In the present embodiment, installed in the vertically or horizontally flue between thermal power plant air preheater 2 and deduster 3 some
Root spray gun, installation position selection are distributed than more uniform position in flue gas duct.One group of gas-liquid two-phase flow nozzle is opened up on spray gun,
The direction of nozzle spray is vertical with flow of flue gas direction.One water pump of air compressor 7 and first is set, and the first water pump is by desulfurization
Waste water is drawn into spray gun and is dispersed as droplet and is sprayed into flue by compressed air.By optimizing compressed air and desulfurization wastewater
Straying quatity, ensure spray droplet average grain diameter at 50 μm or so.Meanwhile a spray drying tower 6 is set near deduster 3
With the second water pump, drying tower is entered by pipeline extraction part of smoke before air preheater, in order to not sacrifice the thermal efficiency of boiler,
The high-temperature flue gas amount of extraction is within the 2% of total exhaust gas volumn.Desulfurization wastewater is pumped into spray drying tower 6 using the second water pump,
The gas-liquid two-phase flow nozzle that desulfurization wastewater and the compressed air introduced from air compressor 7 pass through the top of spray drying tower 6 is formed
Spraying, spraying average grain diameter control is within 50 μm.High-temperature flue gas carries out downstream heat transfer with desulfurization wastewater droplet, and droplet is abundant
Evaporation is dried, vapor is evaporated into flue gas, and salt is analyzed with the flying dust cohesion in flue gas and part to enter afterwards and is spray-dried
In the ash bucket of the bottom of device 6.Flue gas after heat exchange is led back by pipeline in the flue before deduster, the ash bucket outlet of drying tower bottom
Connected with dust collector ash hopper.The first valve of installation control on the pipeline of desulfurization wastewater, the are extracted in the first water pump and the second water pump
Two valves, ensure the independent operating of drying evaporation process of the desulfurization wastewater in the spray drying tower 6 in the inner and outer portion of flue.
When unit load is higher and desulfurization wastewater amount is smaller, in order to not influence the thermal efficiency of boiler, second can be closed
Valve, the first valve is opened, make desulfurization wastewater complete to dry evaporation process in flue；, can be with when desulfurization wastewater amount is larger
Open the first valve and the second valve simultaneously, make desulfurization wastewater in flue and spray drying tower 6 in and meanwhile be dried evaporation
Process.
When unit load is relatively low, and the cigarette temperature after air preheater is unsatisfactory for the temperature requirement of desulfurization wastewater evaporation, can close
First valve, the second valve is opened, make desulfurization wastewater complete to dry evaporation process in spray drying tower 6；Or it can close
Second valve, open the first valve, and open the gas baffle before spray drying tower 6, make a part of high-temperature flue gas without
Air preheater is exchanged heat in the flue before entering deduster, and the cigarette temperature after air preheater is got a promotion, and desulfurization wastewater is completed in flue
Drying evaporation process.
Described above is only the preferred embodiment of the present invention, is not intended to limit the invention, it is noted that for this skill
For the those of ordinary skill in art field, without departing from the technical principles of the invention, can also make it is some improvement and
Modification, these improvement and modification also should be regarded as protection scope of the present invention.
Claims (9)
- A kind of 1. system that desulfurization wastewater is handled using fume afterheat, it is characterised in that including：Receive the air preheater of flue gas, remove Dirt device, desulfurizing tower and spray drying tower, flue gas through the first flue enter the air preheater in, the outlet flue of the air preheater with The smoke inlet of the deduster is connected by the second flue, and the flue gas in deduster is entered in desulfurizing tower by the 3rd flue, Wherein, the smoke inlet of the spray drying tower is connected by the 4th flue with the first flue, and the flue gas of spray drying tower goes out Mouth is connected by the 5th flue with the second flue, and the wastewater effluent mouth of the desulfurizing tower is communicated with spray by the first waste water water pipe Rifle, the first waste water water pipe are provided with the first water pump, the first valve, and the nozzle of the spray gun connects the second flue, the spray Rifle is connected with air compressor, and the wastewater effluent mouth of the desulfurizing tower connects the water inlet of spray drying tower by the first waste water water pipe Mouthful, the second waste water water pipe is provided with the second water pump, the second valve.
- 2. the system according to claim 1 that desulfurization wastewater is handled using fume afterheat, it is characterised in that spray drying tower Exiting flue gas led back by the 5th flue in the second flue, specifically lead back position nozzle location of spray gun in the second flue Front portion, apart from more than 10 meters of the position of nozzle.
- 3. the system according to claim 1 that desulfurization wastewater is handled using fume afterheat, it is characterised in that the spray gun Nozzle is gas-liquid two-phase flow nozzle.
- 4. the system according to claim 1 that desulfurization wastewater is handled using fume afterheat, it is characterised in that spray drying tower Interior heat transfer form includes downstream heat transfer and countercurrent flow.
- 5. the system according to claim 1 that desulfurization wastewater is handled using fume afterheat, it is characterised in that spray dryer Bottom is provided with drier ash bucket, and the drier ash bucket outlet connects with the dedusting ash bucket of deduster.
- 6. the system according to claim 1 that desulfurization wastewater is handled using fume afterheat, it is characterised in that the nozzle of spray gun The direction for spraying water smoke is vertical with flow of flue gas direction.
- A kind of 7. method that desulfurization wastewater is handled using fume afterheat, it is characterised in that utilize any institute in claim 1 to 6 Desulfurization wastewater is dried the system progress the following two kinds mode that desulfurization wastewater is handled using fume afterheat stated：Mode one：Desulfurization wastewater is drawn into spray gun by the first water pump, and air compressor output squeezing air beats desulfurization wastewater Dissipate into droplet and spray into the second flue and desulfurization wastewater is dried using flue gas；Mode two：Partial fume is extracted from the first flue, flue gas is sent into spray drying tower, desulfurization wastewater is useless through second Water water pipe is exchanged heat into spray drying tower with flue gas, and vapor evaporates after heat exchange is entered in flue gas by the 5th flue, salt Analyze and enter afterwards with the flying dust cohesion in flue gas and part in the dry device ash bucket of spray dryer bottom, the drier ash bucket Outlet connects with the dedusting ash bucket of deduster；Mode one, two respective independent operating of mode, do not interfere with each other.
- 8. the method according to claim 7 that desulfurization wastewater is handled using fume afterheat, it is characterised in that the nozzle of spray gun The average grain diameter of the water smoke of ejection is controlled at 50 μm to 70 μm.
- 9. the method according to claim 7 that desulfurization wastewater is handled using fume afterheat, it is characterised in that from the first flue In the exhaust gas volumn that extracts within the 2% of total exhaust gas volumn.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710674068.1A CN107381698A (en) | 2017-08-09 | 2017-08-09 | Utilize the system and method for fume afterheat processing desulfurization wastewater |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710674068.1A CN107381698A (en) | 2017-08-09 | 2017-08-09 | Utilize the system and method for fume afterheat processing desulfurization wastewater |
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| CN107381698A true CN107381698A (en) | 2017-11-24 |
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| CN201710674068.1A Pending CN107381698A (en) | 2017-08-09 | 2017-08-09 | Utilize the system and method for fume afterheat processing desulfurization wastewater |
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| CN (1) | CN107381698A (en) |
Cited By (6)
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| CN108096988A (en) * | 2018-02-09 | 2018-06-01 | 中冶长天国际工程有限责任公司 | A kind of flue gas purifying method and system for realizing wastewater zero discharge |
| CN108147608A (en) * | 2018-03-07 | 2018-06-12 | 华北电力大学（保定） | It is a kind of to utilize compressed air and the multiple-effect evaporation crystal system and method for heat pump treatment of Power brine waste |
| CN109059027A (en) * | 2018-08-27 | 2018-12-21 | 山东电力工程咨询院有限公司 | A kind of high-temperature biomass gas is cooling and the system and method for UTILIZATION OF VESIDUAL HEAT IN |
| CN109621705A (en) * | 2018-12-12 | 2019-04-16 | 中石化广州工程有限公司 | A kind of wet fuel gas desulfurizing technology of no discharging of waste liquid |
| CN109987772A (en) * | 2019-05-16 | 2019-07-09 | 江苏正士环保科技有限公司 | A kind of method of low-cost processes waste water |
| US20210331943A1 (en) * | 2019-12-25 | 2021-10-28 | Zhejiang University Of Technology | Process and device for continuous treatment of high-concentration organic wastewater |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108096988A (en) * | 2018-02-09 | 2018-06-01 | 中冶长天国际工程有限责任公司 | A kind of flue gas purifying method and system for realizing wastewater zero discharge |
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| CN108147608A (en) * | 2018-03-07 | 2018-06-12 | 华北电力大学（保定） | It is a kind of to utilize compressed air and the multiple-effect evaporation crystal system and method for heat pump treatment of Power brine waste |
| CN108147608B (en) * | 2018-03-07 | 2023-10-13 | 华北电力大学（保定） | Multi-effect evaporation crystallization system and method for treating power plant brine wastewater by using compressed air and heat pump |
| CN109059027A (en) * | 2018-08-27 | 2018-12-21 | 山东电力工程咨询院有限公司 | A kind of high-temperature biomass gas is cooling and the system and method for UTILIZATION OF VESIDUAL HEAT IN |
| CN109621705A (en) * | 2018-12-12 | 2019-04-16 | 中石化广州工程有限公司 | A kind of wet fuel gas desulfurizing technology of no discharging of waste liquid |
| CN109987772A (en) * | 2019-05-16 | 2019-07-09 | 江苏正士环保科技有限公司 | A kind of method of low-cost processes waste water |
| US20210331943A1 (en) * | 2019-12-25 | 2021-10-28 | Zhejiang University Of Technology | Process and device for continuous treatment of high-concentration organic wastewater |
| US11767232B2 (en) * | 2019-12-25 | 2023-09-26 | Zhejiang University Of Technology | Process and device for continuous treatment of high-concentration organic wastewater |
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Application publication date: 20171124 |