CN209113674U - The processing system of coal-fired power station boiler flue gas desulfurization waste-water - Google Patents
The processing system of coal-fired power station boiler flue gas desulfurization waste-water Download PDFInfo
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- CN209113674U CN209113674U CN201821879819.XU CN201821879819U CN209113674U CN 209113674 U CN209113674 U CN 209113674U CN 201821879819 U CN201821879819 U CN 201821879819U CN 209113674 U CN209113674 U CN 209113674U
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Abstract
The utility model provides a kind of processing system of coal-fired power station boiler flue gas desulfurization waste-water, including successively handles through gas explosion settling tank, concentration and settlement device, concentration regulating box and fluidized-bed water gas gasifier；The gas explosion settling tank, for desulfurization wastewater to be isolated sediment and supernatant；The concentration and settlement device, for the supernatant to be condensed into slurries and condensing recovery water；The concentration regulating box, for the concentrated slurry and flying dust to be blended into mortar；The fluidized-bed water gas gasifier, for the mortar to be sulfided into tiny pellet object, and before sending to air preheater, flue is trapped.The utility model is generated using different pH value zonal control sediments, is concentrated using flue gas waste heat, the final classified utilization recycling for realizing desulfurization wastewater.
Description
Technical field
The utility model relates to the processing systems and method of a kind of coal-fired power station boiler flue gas desulfurization waste-water, specially a kind of
The processing system of coal-fired power station boiler flue gas desulfurization waste-water is mainly used for the processing of thermal power plant desulfurization wastewater, belongs to firepower hair
Fossil plant environment protection technical field.
Background technique
Coal is as non-renewable energy, the SO that generates in combustion process2It is one of important Air Pollutants.It builds thus
A large amount of lime stone gypsum wet flue gas desulfurizing facility, for the waste water that these desulfurization equipments generate in acidity, solid content is low (in 1-
2%), main component is dust and desulfurizing byproduct (calcium sulfate and calcium sulfite), also containing soluble chloride and nitrous acid
Salt etc. and heavy metal ion.
Currently, the processing mode taken to these waste water is mainly using physico-chemical process, it may be assumed that add alkali, acid adding,
It neutralizes, the processing of flocculated method, by solid waste filters pressing therein at being used as fixed-end forces after filter cake.These technical matters streams
Journey is long, takes up a large area, and investment and operating cost are high, and the clarification time is long, and national standard is often not achieved after purification of waste water, runs
In blender, mud scraper high failure rate, maintenance is difficult, and the solid waste of generation has certain content of beary metal, difficult
With disposition.
Summary of the invention
The utility model aims at the problems existing in the prior art, and provides a kind of places of coal-fired power station boiler flue gas desulfurization waste-water
Reason system.
Another object of the present invention is to provide a kind of method for handling coal-fired power station boiler flue gas desulfurization waste-water.
The specific technical solution of the utility model is as follows:
A kind of processing system of coal-fired power station boiler flue gas desulfurization waste-water, including sequentially connected gas explosion settling tank, concentration
Settler, concentration regulating box and fluidized-bed water gas gasifier；
The gas explosion settling tank, for desulfurization wastewater to be isolated sediment and supernatant；
The concentration and settlement device, for the supernatant to be condensed into slurries and condensing recovery water；
The concentration regulating box, for the concentrated slurry and flying dust to be blended into mortar；
The fluidized-bed water gas gasifier, for the mortar to be sulfided into tiny pellet object, and before sending to air preheater, flue is caught
Collection.
The utility model preferred design is that the concentration and settlement device is divided into three parts, and top is gas cavity, and middle part is set
Heat exchanger is set, lower part is sedimentation chamber；The gas outlet of the gas cavity is successively connected to through condenser, heat exchanger tube and circulating fan
The air inlet of gas cavity, forming circuit.
The utility model preferred design is that first heat exchanger tube is arranged in house outlet flue；The heat exchange
The heat absorbing end of pipe is arranged in house outlet flue.
The utility model preferred design is that the condensed water of the condenser is recycled by condensation water tank；The concentration and settlement
Device setting heat exchanger position is additionally provided with ultrasonator；Agitating device is arranged in concentration regulating box.
The utility model preferred design is, filler is equipped in the fluidized-bed water gas gasifier, and top is connected to empty pre- by the road
Flue before device, bottom connect heated air source by the road；Wherein filler uses diameter for the silica of 3-10mm, molecular sieve or violet
Green stone.
A method of processing coal-fired power station boiler flue gas desulfurization waste-water, method includes the following steps:
1) desulfurization wastewater inputs gas explosion settling tank, blasts air to gas explosion settling tank upper layer and carries out gas explosion, isolated precipitating
Object is to Sewage treatment case, isolated supernatant to concentration and settlement device；
2) it is heated into the supernatant of concentration and settlement device by heat exchanger, the aqueous vapor for being evaporated to top is returned by condenser
It receives, the concentrated slurry for being settled down to lower part is sent to concentration regulating box；
3) concentration regulating box blends the concentrated slurry and flying dust, be mixed into the mortar that solid content is 40%-70% send to
Fluidized-bed water gas gasifier；
4) it to fluidized-bed water gas gasifier bottom input hot-air, after the mortar is sulfided into tiny pellet object, then send to sky
Flue before pre- device, is trapped by sack cleaner.
The utility model preferred design is, in step 1), adjusts in gas explosion settling tank pH value of waste water to 4.5-6；Step
2) in, slurry pH value is adjusted in concentration and settlement device to 8-12.
The utility model preferred design is, in step 1) and step 2, adjusts pH value and uses lime, sodium carbonate, sulfurous
Sour sodium or potassium carbonate.
The utility model preferred design is, in step 2, slurry temperature is in 45-60 DEG C of model in control concentration and settlement device
It encloses, and ultrasonication can be carried out.
The utility model preferred design is, in step 4), filler uses diameter for 3-10mm's in fluidized-bed water gas gasifier
Silica, molecular sieve or cordierite；After the heat source of the hot-air is using power plant's First air, Secondary Air or heat source gas heating
Air, control fluidized-bed temperature in 110-140 DEG C of range.
The utility model has the following beneficial effects: compared with prior art
1, the utility model is generated using different pH value zonal control sediments, is concentrated using flue gas waste heat, most
The classified utilization recycling of desulfurization wastewater is realized eventually.
2, the utility model devises concentration and settlement device and fluidized-bed water gas gasifier.Desulfurization wastewater is in the pH value section of control
Under the conditions of carry out gas explosion sedimentation, be then added in concentration and settlement device, settler top is gone out from deduster by pipe heat exchanger
Mouth flue heat exchange controls slurry temperature, and the water after evaporation is recycled by condenser, realizes the substantially harmless of condensed water
Change recycling.
3, flying for part deduster collection is added by the underflow of concentration and settlement device in the utility model in concentration adjusting tank
Ash adjustment solid content, and pH value (deduster flying dust is in alkalinity) is further increased, it is empty using heat to finally enter fluidized-bed water gas gasifier
Gas is evaporated, and the particulate matter after evaporation can be sent into the flue before air preheater, is recycled by deduster, does not influence to recycle flying dust
Recycling.Also, the particulate matter after evaporating is agglomerated particle, and alkalinity is higher than original flying dust, during smoke movement,
Quenched effect can be generated to the original ash surface of flue gas, reduce ash surface stickiness, air preheater obstruction risk is effectively reduced.
Detailed description of the invention
Fig. 1 is the processing system figure of one coal-fired power station boiler flue gas desulfurization waste-water of the utility model embodiment；
In figure: 1- waste water water source；2- gas explosion settling tank；3- concentration and settlement device；4- concentration adjusting tank；5- deduster flying dust
Source；6- heated air source；7- fluidized-bed water gas gasifier；Flue before 8- air preheater；9- pipe heat exchanger；10- house outlet flue；
11- condenser；12- return water tank；13- cooling cycle blower；14- Sewage treatment case.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work
Every other embodiment obtained, fall within the protection scope of the utility model.
Embodiment one:
As shown in Figure 1, the processing system of the coal-fired power station boiler flue gas desulfurization waste-water of the utility model, including successively through quick-fried
Gas settling tank 2, concentration and settlement device 3, concentration regulating box 4 and fluidized-bed water gas gasifier 7.
Waste water water source 1 is first passed through gas explosion settling tank 2, enters concentration and settlement device 3 by gas explosion settling tank 2, concentration and settlement device 3 divides
For three parts, top is gas cavity, and pipe heat exchanger 9 is arranged in middle part, and lower part is sedimentation chamber.The release end of heat of pipe heat exchanger 9
It is arranged in the middle part of concentration and settlement device, heat absorbing end is arranged in heat source side.The gas outlet of gas cavity is successively through condenser 11, heat exchanger tube
It is connected to the air inlet of gas cavity with circulating fan 13, and is formed into a loop, blow valve, safety valve etc. can be also equipped in circuit.
Desulfurization wastewater is isolated sediment and supernatant by gas explosion settling tank 2；Supernatant concentration is slurried concentration and settlement device 3
Liquid and condensing recovery water；Concentrated slurry and flying dust from dedusting flying dust source 5 are blended into mortar by concentration regulating box 4；Fluidized bed
Evaporator 7 evaporates mortar, forms tiny pellet object in a fluidized bed, and flue 8 before sending to air preheater, traps through deduster.
Spherical porous aggregate is equipped in fluidized-bed water gas gasifier 7, top is connected to flue before air preheater by the road, and bottom is by the road
Heated air source 6 is connected, hot-air is blasted by fluidized-bed bottom.Filler uses diameter for the two of 3-10mm in fluidized-bed water gas gasifier
Silica, molecular sieve or cordierite.
Embodiment two:
The further design of this example is that heat exchanger tube is arranged in house outlet flue 10, absorbs heat in flue
Water supply gas lift temperature, or use other heat sources.
Embodiment three:
The further design of this example is that condenser 11 is also configured with the recycling of condensation water tank 12, to recycle under condensation
The water come；Agitating device is arranged in concentration regulating box 4, is mixed admittedly with sufficiently adjusting liquid.Furthermore it is also possible to which liquid level, solid content is arranged
Monitoring device etc..
Example IV:
The further design of this example is that ultrasonator is arranged in the middle part of concentration and settlement device 3, and ultrasonator is located at pipe
In the gap of formula heat exchanger tube release end of heat or it is arranged in around pipe type heat transfer pipe release end of heat.
Embodiment five:
The method that the utility model handles coal-fired power station boiler flue gas desulfurization waste-water, specific embodiment are as follows:
1, desulfurization wastewater is passed through in gas explosion settling tank, and control pH value in pond, if pH value is too low, can pass through 5.5 or so
Lime is added and adjusts pH value, blasts air on gas explosion settling tank upper layer and carries out gas explosion, the particulate matter in lower liquid passes through nature
Sedimentation is recycled, and clarified solution enters concentration and settlement device.
2, adjust pH value to 8 or more by the way that basic species are added to concentration and settlement device, basic species can be used lime, sodium carbonate,
Sodium sulfite, potassium carbonate etc..The gas cavity on concentration and settlement device top is followed with cooling herein for accommodating the vapor of evaporation
Ring blower blasts the hot wind heated by flue, and vapor is sent into condenser, is recycled after water condensation therein, condensed
Air enters the heat exchanger tube in flue, returns to gas cavity after heating；Heat release of the middle section in liquid level heat exchanger arranged below
End, using water as medium, heat absorbing end exchanges heat after absorbing heat from house outlet flue with slurries herein, controls slurries
For temperature in 45-60 DEG C of range, lower part is settling zone, and in this region particle agglomeration occurs for the slurries after concentration, generates larger
Enter concentration adjusting tank after grain sediment.Ultrasonic oscillation device is set in the gap of heat exchanger release end of heat, opens vibration and is used for
Prevent fouling of heat exchangers；
3, the flying dust of part house outlet is added in concentration adjusting tank, solid content concentration is adjusted to 50% or so conveying
To fluidized-bed water gas gasifier.
4, spherical porous aggregate, diameter 3-10mm are set inside fluidized-bed water gas gasifier, and material can be used silica, divide
Sub sieve, cordierite etc. input hot-air from fluidized-bed bottom, heated air source can be power plant's First air, Secondary Air or other add
Air after heat, control fluidized-bed temperature is in 110-140 DEG C of range, ball filler formation fluidized bed under the blowing of hot-air,
The slurries of concentration are sprayed into fluidized bed lower part, the solidification of ball filler dry tack free are sprayed at, during fluidized bed motion collision
Broken to form fine particle and take out of with air-flow, flue before these last particulate matters are sent to air preheater is mixed into flying dust in deduster
It recycles.
Claims (8)
1. a kind of processing system of coal-fired power station boiler flue gas desulfurization waste-water, it is characterised in that: heavy including sequentially connected gas explosion
Pond, concentration and settlement device, concentration regulating box and fluidized-bed water gas gasifier drop；
The gas explosion settling tank, for desulfurization wastewater to be isolated sediment and supernatant；
The concentration and settlement device, for the supernatant to be condensed into slurries and condensing recovery water；
The concentration regulating box, for the concentrated slurry and flying dust to be blended into mortar；
The fluidized-bed water gas gasifier, for the mortar to be sulfided into tiny pellet object, and before sending to air preheater, flue is trapped.
2. the processing system of coal-fired power station boiler flue gas desulfurization waste-water according to claim 1, it is characterised in that:
The concentration and settlement device is divided into three parts, and top is gas cavity, and heat exchanger is arranged in middle part, and lower part is sedimentation chamber；It is described
The gas outlet of gas cavity is successively connected to the air inlet of gas cavity through condenser, heat exchanger tube and circulating fan, forming circuit.
3. the processing system of coal-fired power station boiler flue gas desulfurization waste-water according to claim 2, it is characterised in that: described first
Heat exchanger tube is arranged in house outlet flue；The heat absorbing end of the heat exchanger tube is arranged in house outlet flue.
4. the processing system of coal-fired power station boiler flue gas desulfurization waste-water according to claim 3, it is characterised in that: the condensation
The condensed water of device is recycled by condensation water tank.
5. the processing system of coal-fired power station boiler flue gas desulfurization waste-water according to claim 3, it is characterised in that: the concentration
Settler setting heat exchanger position is additionally provided with ultrasonator.
6. the processing system of coal-fired power station boiler flue gas desulfurization waste-water according to claim 3, it is characterised in that: the concentration
Agitating device is arranged in regulating box.
7. the processing system of -6 any coal-fired power station boiler flue gas desulfurization waste-waters according to claim 1, it is characterised in that: institute
It states and is equipped with filler in fluidized-bed water gas gasifier, top is connected to flue before air preheater by the road, and bottom connects heated air source by the road.
8. the processing system of coal-fired power station boiler flue gas desulfurization waste-water according to claim 7, it is characterised in that: wherein filler
Use diameter for the silica of 3-10mm, molecular sieve or cordierite.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821879819.XU CN209113674U (en) | 2018-11-15 | 2018-11-15 | The processing system of coal-fired power station boiler flue gas desulfurization waste-water |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821879819.XU CN209113674U (en) | 2018-11-15 | 2018-11-15 | The processing system of coal-fired power station boiler flue gas desulfurization waste-water |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209113674U true CN209113674U (en) | 2019-07-16 |
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ID=67205278
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821879819.XU Active CN209113674U (en) | 2018-11-15 | 2018-11-15 | The processing system of coal-fired power station boiler flue gas desulfurization waste-water |
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| Country | Link |
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| CN (1) | CN209113674U (en) |
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2018
- 2018-11-15 CN CN201821879819.XU patent/CN209113674U/en active Active
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Address after: 210046 fairyland Road, Qixia District, Nanjing, Jiangsu Province, No. 10 Patentee after: National Energy Group Science and Technology Research Institute Co.,Ltd. Address before: 210046 fairyland Road, Qixia District, Nanjing, Jiangsu Province, No. 10 Patentee before: GUODIAN SCIENCE AND TECHNOLOGY RESEARCH INSTITUTE Co.,Ltd. |