CN208049712U - A kind of coal-burning power plant environmental protection island system of collaboration zero-emission desulfurization wastewater - Google Patents
A kind of coal-burning power plant environmental protection island system of collaboration zero-emission desulfurization wastewater Download PDFInfo
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- CN208049712U CN208049712U CN201721701839.3U CN201721701839U CN208049712U CN 208049712 U CN208049712 U CN 208049712U CN 201721701839 U CN201721701839 U CN 201721701839U CN 208049712 U CN208049712 U CN 208049712U
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Abstract
The utility model discloses a kind of coal-burning power plant environmental protection island systems of collaboration zero-emission desulfurization wastewater, including the ultra-clean exhaust system of flue gas and desulfurization wastewater zero-emission system, the ultra-clean exhaust system of the flue gas includes at least Benitration reactor, electric precipitator and wet desulphurization absorption tower, is connected by flue between device；The desulfurization wastewater zero-emission system includes at least desulfurization wastewater pretreatment and film upgrading unit, concentrated water solvent reclaiming unit and concentrated water solute recovery unit.The utility model melts the zero-emission of waste water and the purification of flue gas in one, after desulfurization wastewater is preprocessed and the processing of film upgrading unit, the solvent of concentrated water is able to reuse in denitrating system urea dissolution zone, the solute of concentrated water is precipitated in urea pyrolysis stove and is recycled in the dust-extraction unit of downstream with flue gas, save denitrating system water consume, the characteristics of realizing collaboration zero-emission desulfurization wastewater, the system is made to have both energy saving, emission reduction, consumption reduction.
Description
Technical field
The utility model is related to coal-burning power plant pollutant comprehensive treatment fields, and in particular to a kind of collaboration zero-emission desulfurization wastewater
Coal-burning power plant environmental protection island system.
Background technology
With《Prevention and control of air pollution action plan》(" ten, air ") and《Coal electricity energy-saving and emission-reduction upgrade and transformation action meter
It draws (2014-2020)》Successive publication, arrive the year two thousand twenty, all coal-burning power plants for having transformation condition in the whole nation strive realizing super
Low emission, i.e., under the conditions of benchmark oxygen content 6%, flue dust, sulfur dioxide, discharged nitrous oxides concentration be respectively no higher than 5,35,
50 milligrams/cubic metre, for the minimum discharge requirement of above-mentioned pollutant, coal-burning power plant is configured with environmentally friendly island system after stove, main
Include with SCR methods denitration (from the angle of safety in production, the preparation of reducing agent mostly uses urea pyrolysis method), wet desulphurization
With the flue gas purification system based on electric dust-removing equipment.What then on April 16th, 2015, State Council printed and distributed《Water pollution action meter
It draws》Clearly proposed in (" ten, water "), arrive the year two thousand twenty, National Water Environmental quality obtains interim improvement, seriously polluted water body compared with
It is greatly reduced, " taking charge of industrial pollution severely prevents " becomes vital task.Coal fired power generation industry belongs to one of five big high water usage industries,
From economical operation and environmental protection, power generation water is saved, realizes that coal-burning power plant's waste water zero emission is significant.
In existing environmentally friendly island system, flue gas desulfurization most generally using Limestone-gypsum Wet Flue Gas Desulfurization Process technology,
With technology maturation, desulfuration efficiency is high, the advantages such as wide that are applicable in coal, but the technology will produce during using it is a certain amount of de-
Sulphur waste water.Desulfurization wastewater big, complicated component, salt content height (Cl with variation water quality range-、SO4 2-Deng), suspension content it is high,
The strong feature of corrosivity significantly increases intractability, therefore realizes that the zero-emission of desulfurization wastewater has become and realize that full factory is useless
The key of water zero discharge.
The most commonly used desulfuration waste water treatment process of domestic application mainly uses chemical precipitation method at present, but the method cannot
The chlorion and fluorine ion of dissolving are effectively removed, therefore treated that waste water can not recycle, cannot be satisfied full factory's waste water " zero
The environmental requirement of discharge "；There is also problems urgently to be resolved hurrily for flue spray-on process in development phase：Processing capacity is very low, not
The desulfurization wastewater of evaporation can corrode flue, and the dirt that the desulfurization wastewater of evaporation is formed is difficult cleaning, flue blockage is be easy to cause, if not
Desulfurization wastewater is pre-processed, plug nozzle is easy.Evaporative crystallization method can detach the salt in waste water, but cannot
Different price salt is detached, and it is higher to invest operating cost；Membrane concentration method can efficiently use the fresh water of generation, but concentrated
The harmlessness disposing problems demand for the concentrated water that journey generates solves.
Utility model content
In view of the drawbacks described above of the prior art, the utility model provides a kind of fire coal electricity of collaboration zero-emission desulfurization wastewater
Factory's environmental protection island system.Specific technical solution is as follows：
The utility model provides a kind of coal-burning power plant environmental protection island system of collaboration zero-emission desulfurization wastewater comprising flue gas is super
Net exhaust system and desulfurization wastewater zero-emission system, the ultra-clean exhaust system of flue gas include at least Benitration reactor, electric precipitator and wet
Method desulfuration absorbing tower is connected by flue between device；Desulfurization wastewater zero-emission system includes at least desulfurization wastewater pretreatment and film
Upgrading unit, concentrated water solvent reclaiming unit and concentrated water solute recovery unit.
In preferred embodiment, the above-mentioned ultra-clean exhaust system of flue gas includes coal-burning boiler, Benitration reactor, air preheat
Device, gas cooler, electric precipitator, air-introduced machine, wet desulphurization absorption tower, smoke re-heater and chimney lead to successively between device
Flue is crossed to be connected.
In preferred embodiment, the desulfurization wastewater pretreatment of above-mentioned desulfurization wastewater zero-emission system and film upgrading unit at least wrap
Include primary sedimentation tank, neutralization-three header of reaction-flocculation, clarifying basin, sludge treatment device, super/micro-filtration, high pressure reverse osmosis unit,
Fresh water process water tank, mating waste water delivery pump, high-pressure circulation pump and cleaning pump.
Preferably, among the above and-three header of reaction-flocculation be equipped with medicament addition device：It neutralizes except hard case is equipped with
NaOH and Na2CO3Throwing device；Reaction chamber is equipped with organic sulfur and flocculating agent feeding device；Flocculation tanks are equipped with flocculant and help
Solidifying agent throwing device.
Preferably, above-mentioned high pressure reverse osmosis unit is in series by two sections of Special high-voltage reverse osmosis membrane assemblies, first segment film
Column uses ductwork type high pressure reverse osmosis membrane assembly-STRO, second segment film column to use dish tubular type high pressure reverse osmosis membrane assembly-DTRO,
It is all made of cross-flow filtration form.
Preferably, operating pressure ranging from 70bar~80bar of above-mentioned high pressure reverse osmosis unit, salt rejection rate is ranging from
96%~98%, the rate of recovery ranging from 60%~70%, the TDS contents of fresh water<The TDS content ranges of 2000mg/L, concentrated water are
100000mg/L~130000mg/L.
Preferably, above-mentioned fresh water process water tank is used to collect the fresh water of high pressure reverse osmosis unit, and is delivered to through fresh water pump
The consumption region of plant area's process water.
In preferred embodiment, the concentrated water solvent reclaiming unit of above-mentioned desulfurization wastewater zero-emission system includes at least concentrated water technique
Water tank, urea dissolving tank, urea liquid storage tank and urea liquid high-speed circulating module.
Preferably, above-mentioned concentrated water technique water tank, urea dissolving tank, urea liquid storage tank and urea liquid high-speed circulating module
It is connected by stainless steel pipes, the transmission of urea liquid is realized using urea liquid delivery pump and urea liquid circulating pump.
Preferably, above-mentioned concentrated water technique water tank is used to collect the concentrated water of high pressure reverse osmosis unit, and is delivered to through concentrated water pump
The urea dissolving tank in denitration urea area, the solvent of concentrated water are used for the dissolving of urea granules.
Preferably, the ratio between the volume of above-mentioned concentrated water technique water tank and the volume of urea dissolving tank are 2：1~5：1.
Preferably, the ratio between the concentrated water yield of above-mentioned high pressure reverse osmosis unit and urea dissolving water consumption are 5：1~2：1.
In preferred embodiment, the concentrated water solute recovery unit of above-mentioned desulfurization wastewater zero-emission system includes at least urea liquid
Injector, urea pyrolysis stove and downstream dust-extraction unit collect ash bucket.
Preferably, above-mentioned urea liquid injector uses stainless steel, and urea woven hose takes Insulation, reasonable
Injection flow and preferably under the premise of atomizing effect, urea liquid injector have anti-clogging, anti-urea crystals feature,
Pore diameter range is 0.1mm~0.2mm.
Preferably, above-mentioned urea pyrolysis stove uses stainless steel, by making its tool to the transformation of urea pyrolysis stove configuration
There is anticlogging feature, ensures urea while abundant pyrolysis, the solute of concentrated water is precipitated in urea pyrolysis stove and with flue gas
It is recycled in the dust-extraction unit of downstream.
The technological process of the coal-burning power plant environmental protection island system of above-mentioned collaboration zero-emission desulfurization wastewater is as follows：
Step 1 utilizes the ultra-clean exhaust system of flue gas：
After step 1.1, the flue gas for making coal-burning boiler generate are mixed with the reducing agent ammonia that urea pyrolysis generates in flue,
Catalysis reaction occurs in Benitration reactor, the nitrogen oxides in flue gas generates nitrogen and water under the action of denitrating catalyst,
Elemental Mercury in flue gas generates mercury oxide and particulate Hg under the action of demercuration catalyst；
Step 1.2 makes that treated that flue gas passes sequentially through air preheater and gas cooler through step 1.1, to flue gas
Heat be recycled, so that flue-gas temperature is reduced to acid dew point or less；
Step 1.3 makes that treated that flue gas enters electric precipitator through step 1.2, and particulate matter in flue gas is adsorbed by flue dust
SO3, particulate Hg be captured into collect ash bucket；
Step 1.4 makes to enter wet desulphurization absorption tower under air-introduced machine effect through step 1.3 treated flue gas, to cigarette
SO in gas2, mercury oxide, particulate pollutant handled；
Step 1.5 makes that treated that flue gas passes through smoke re-heater through step 1.4, and the temperature of flue gas is promoted to about 80
Degree Celsius；
Step 2 utilizes desulfurization wastewater zero-emission system：
Step 2.1 makes desulfurization wastewater initially enter Wastewater Pretreatment unit, is stood in primary sedimentation tank most of outstanding to remove
Desulfurization wastewater is then delivered to neutralization-three header of reaction-flocculation by float by delivery pump, adjusts pH value, the drop of desulfurization wastewater
The hardness of low desulfurization wastewater and to desulfurization wastewater carry out flocculation reaction；By neutralized-three header of reaction-flocculation, that treated is de-
Sulphur waste water is promoted to clarifying basin by waste water pump, is detached through sludge press filtration device press filtration after further flocculation sediment, filtrate returns just
Heavy pond；
Step 2.2, the clear water on clarifying basin top in step 2.1 is added acid for adjusting pH to after 6~9 by film upgrading unit,
It is filtered after processing using super/micro-filtration and concentration is carried out by high pressure reverse osmosis unit, gained fresh water collecting is in light
Hydraulic art water tank and the process water for being used to supplement plant area, gained concentrated water are collected in concentrated water technique water tank；
The concentrated water of concentrated water technique water tank is delivered to urea dissolving tank by step 2.3 through waste water pump, and the solvent of concentrated water is for urinating
The dissolving of element, urea liquid are pumped into urea liquid storage tank through urea liquid delivery pump, urea liquid storage tank and urea pyrolysis stove it
Between set urea liquid high-speed circulating module, carry out the transmission of urea liquid；
Urea liquid is sprayed into urea pyrolysis stove to prepare denitrification reducing agent ammonia by step 2.4 by urea liquid injector
The solute of gas, concentrated water is precipitated in urea pyrolysis stove, and with the ammonia of generation by air shooter through ammonia-spraying grid and boiler smoke
Gas is mixed into the ultra-clean exhaust system of flue gas in flue.
Compared with the system of existing coal-burning power plant's environmental protection island, the utility model has apparent advantage：
1) this environmental protection island system melts the zero-emission of desulfurization wastewater and the minimum discharge of flue gas in one, realizes that " aqueous vapor is simultaneously
Control ", technological process is simplified, floor space is reduced, saves cost of investment.
2) fresh water that desulfurization wastewater is generated through membrane concentration method is used to supplement the process water of plant area, and the solvent of concentrated water is for taking off
The dissolving of nitre system urea, saves denitrating system water consume, meets energy saving clean manufacturing, emission reduction, the requirement of consumption reduction.
3) desulfurization is made using the heat in urea pyrolysis stove using special urea liquid injector and urea pyrolysis stove
The solute of waste water concentrated water is precipitated in urea pyrolysis stove and is recycled in the dust-extraction unit of downstream with flue gas, solves concentrated water
Harmlessness disposing problem.
It should be understood that in the scope of the utility model, above-mentioned each technical characteristic of the utility model and below (such as implementation
Example) in specifically describe each technical characteristic between can be combined with each other, to form a new or preferred technical solution.It is limited to
Length, not repeated them here.So every do not depart from the equivalent or modification completed under principle disclosed in the utility model,
Both fall within the range of the utility model protection.
Below with reference to attached drawing, the utility model is described in further detail, to absolutely prove the purpose of this utility model, skill
Art feature and technique effect.
Description of the drawings
Fig. 1 is the technique for the coal-burning power plant environmental protection island system that zero-emission desulfurization wastewater is cooperateed in the utility model preferred embodiment
Flow diagram；
Wherein,
The ultra-clean exhaust system B- of A- flue gases is desulfurization wastewater zero-emission system 1- coal-burning boiler 2- Benitration reactors 3- empty
Air preheater 4- gas cooler 5- electric precipitator 6- air-introduced machine 7- wet desulphurization absorption tower 8- smoke re-heater 9- cigarettes
Chimney 10- primary sedimentation tanks 11- is neutralized except hard case 12- reaction chambers 13- flocculation tanks 14- clarifying basins 15- surpasses/micro-filtration 16- high
Press reverse osmosis unit 17- ductwork type high pressure reverse osmosis membrane assembly-STRO membrane stack 18- dish tubular type high pressures reverse osmosis membrane assembly-
DTRO membrane stack 19- fresh water process water tank 20- concentrated water technique water tank 21- urea dissolving tank 22- urea liquid storage tanks 23- urine
Plain solution high-speed circulating module 24- urea liquids injector 25- urea pyrolysis stove 26- ammonia-spraying grid 27- sludge press filtrations dress
Set the 4th waste water pump 33- the 5th of 28- sludge buckets 29- the first waste water pump 30- the second waste water pump 31- third waste water pumps 32-
The 8th waste water pump 37- the first urea liquid delivery pumps 38- of the 7th waste water pump 36- of the 6th waste water pump 35- of waste water pump 34-
Two urea liquid delivery pump 39- third urea liquid delivery pump 40- desulfurization slurry dehydration devices.
Specific implementation mode
The utility model is described in detail with reference to embodiment.Following embodiment will be helpful to the technology of this field
Personnel further understand the utility model, but do not limit the utility model in any form.It should be pointed out that this field
For those of ordinary skill, without departing from the concept of the premise utility, it can also make certain adjustments and improvements, all belong to
In the scope of protection of the utility model.
Embodiment 1
A kind of coal-burning power plant environmental protection island system of collaboration zero-emission desulfurization wastewater is present embodiments provided, it is mainly super including flue gas
Net exhaust system and desulfurization wastewater zero-emission system.As shown in Figure 1, the ultra-clean exhaust system of flue gas includes mainly coal-burning boiler 1, collaboration
Remove the Benitration reactor 2 of nitrogen oxides and oxidizing simple substance mercury, air preheater 3, gas cooler 4, cooperation-removal flue dust,
Electric precipitator 5, air-introduced machine 6, cooperation-removal sulfur dioxide, mercury oxide, particulate pollutant and the nitrogen oxidation of grain mercury and sulfur trioxide
Wet desulphurization absorption tower 7, smoke re-heater 8 and the chimney 9 of object, apparatus above is sequentially connected by flue；Desulfurization wastewater zero-emission
System is pre-processed by desulfurization wastewater and film upgrading unit, concentrated water solvent reclaiming unit and concentrated water solute recovery unit form, desulfurization
Wastewater Pretreatment and film upgrading unit include mainly primary sedimentation tank 10, (11- neutralizations remove three header 11-12-13 of neutralization-reaction-flocculation
Hard case 12- reaction chamber 13- flocculation tanks), clarifying basin 14, sludge treatment device 27-28 (27- sludge press filtration device 28- sludge buckets),
Super/micro-filtration 15, high pressure reverse osmosis unit 16, fresh water process water tank 19, mating waste water delivery pump, high-pressure circulation pump and clear
Wash pump；Concentrated water solvent reclaiming unit includes mainly concentrated water technique water tank 20, urea dissolving tank 21, urea liquid storage tank 22 and urea
Solution high-speed circulating module 23, apparatus above are connected by stainless steel pipes, and urea liquid delivery pump and urea liquid is relied on to follow
Ring pump realizes the transmission of urea liquid；Concentrated water solute recovery unit includes mainly urea liquid injector 24, urea pyrolysis stove 25
Ash bucket is collected with downstream dust-extraction unit.
Neutralization-three header of reaction-flocculation is equipped with medicament addition device；It neutralizes except hard case 11 is equipped with NaOH and Na2CO3
Throwing device；Reaction chamber 12 is equipped with organic sulfur and flocculating agent feeding device；Flocculation tanks 13 are equipped with flocculant and flocculation aid is thrown
Feeder apparatus.
Fresh water process water tank 19 is used to collect the fresh water of high pressure reverse osmosis unit 16, and is delivered to plant area's technique through fresh water pump
The consumption region of water.
Concentrated water technique water tank 20 is used to collect the concentrated water of high pressure reverse osmosis unit 16, and is delivered to denitration urea through concentrated water pump
The urea dissolving tank 21 in area, the solvent of concentrated water are used for the dissolving of urea granules.
High pressure reverse osmosis unit 16 is in series by two sections of Special high-voltage reverse osmosis membrane assemblies, and first segment film column uses pipe network
Formula high pressure reverse osmosis membrane assembly-STRO 17, second segment film column use dish tubular type high pressure reverse osmosis membrane assembly-DTRO 18, adopt
With cross-flow filtration form.
The operating pressure of high pressure reverse osmosis unit 16 ranging from 70bar~80bar, salt rejection rate ranging from 96%~98%,
The rate of recovery ranging from 60%~70%, the TDS contents of fresh water<2000mg/L, the TDS content ranges of concentrated water be 100000mg/L~
130000mg/L。
The ratio between concentrated water technique water tank volume 20 and 21 volume of urea dissolving tank are 2：1~5：1, high pressure reverse osmosis unit 16
The ratio between concentrated water yield and urea dissolving water consumption are 5：1~2：1.
Urea liquid injector 24 uses stainless steel, and urea woven hose takes Insulation, in rational injection stream
Amount and preferably under the premise of atomizing effect, injector have anti-clogging, anti-urea crystals feature, pore diameter range 0.1mm
~0.2mm.
Urea pyrolysis stove 25 uses stainless steel, anticlogging by being made it have to the transformation of urea pyrolysis stove configuration
Feature ensures urea while abundant pyrolysis, and the solute of concentrated water is precipitated and with flue gas in urea pyrolysis stove in downstream dedusting
It is recycled in device.
Embodiment 2
The technological process of the coal-burning power plant environmental protection island system of above-mentioned collaboration zero-emission desulfurization wastewater is as follows：
In the ultra-clean exhaust system A of flue gas, flue gas and the reducing agent ammonia of urea pyrolysis generation that coal-burning boiler 1 generates exist
After being mixed in flue, the conversion zone for being loaded with catalyst is entered through 2 top commutation layer of Benitration reactor, the nitrogen oxides in flue gas exists
Selective catalytic reduction reaction occurs under the action of denitrating catalyst, generates nitrogen and water, the Elemental Mercury in flue gas is urged in demercuration
Oxidation reaction occurs under the action of agent, generates mercury oxide and particulate Hg；Flue gas passes sequentially through air preheater 3 and flue gas cooling
Device 4 is recycled the heat of flue gas, improves the thermal efficiency of boiler, and flue-gas temperature drops to acid dew point hereinafter, major part
SO3Condensation is adsorbed by flue dust, and flue-gas temperature is reduced to 90 degrees centigrades, so that the specific resistance of dust in flue gas is reduced, Jin Erti
The high efficiency of dust collection of downstream electric precipitator 5；After flue gas enters electric precipitator 5, particulate matter in flue gas, by flue dust absorption
SO3, particulate Hg be captured into collect ash bucket；Then, flue gas introduces wet desulphurization absorption tower 7 under the effect of air-introduced machine 6, wet
In method desulfuration absorbing tower, the SO in flue gas2It is absorbed by lime stone slurry, the SO in mercury oxide and slurries in flue gas3 2-After reaction
It is dissolved in desulfurization slurry, in addition, the partial particulate pollutant in flue gas can be also washed under the effect of the spray of lime stone slurry
In desulfurization slurry；Finally, flue gas passes through smoke re-heater 8, and flue-gas temperature is promoted to 80 degrees centigrades, avoids flue gas and pass through
Gypsum rain phenomenon after the discharge of chimney 9.Pass through the collaboration governance role of each pollutant catabolic gene equipment in above-mentioned ultra-clean exhaust system
Minimum discharge can be achieved, i.e., under the conditions of benchmark oxygen content 6%, flue dust, sulfur dioxide, discharged nitrous oxides concentration be not high respectively
In 5,35,50 milligrams/cubic metre.
In desulfurization wastewater zero-emission system B, desulfurization wastewater initially enters pretreatment unit, is carried out in primary sedimentation tank 10 quiet
It sets, to remove the most suspended substances in waste water.Waste water is promoted to three header 11- of neutralization-reaction-flocculation after through delivery pump
12-13, the pH value of desulfurization wastewater are generally below 6.0, weakly acidic, therefore in and except being equipped with NaOH and Na on hard case 112CO3It throws
Feeder apparatus, the pH value for adjusting waste water reduce the hardness of waste water, Ca to 9~9.52+、Mg2+It can be with other heavy metal ion
OH-Or CO3 2-Generate the hydroxide or carbonate deposition of indissoluble；Waste water enters reaction chamber 12 from neutralization except hard case 11 flows automatically,
Organic sulfur and flocculant are added in reaction chamber, it is impossible to the residual heavy metal of hydroxide form precipitation with sulfide precipitation
Form removes, and the sediment in water is made to form the bulky grain flocculate for being easy to sedimentation；The water outlet of reaction chamber 12 enters flocculation tanks 13,
Flocculation aid is added in flocculation tanks 13, flocculation reaction is carried out under slow-speed of revolution stirring.Flocculation tanks water outlet is promoted to clear through waste water pump
Clear pond 14, waste water flco is further grown up in clarifying basin 14, and carries out precipitation separation, clarifying basin bottom mud by top inclined plate
Slag is sent by sludge delivery pump to sludge press filtration device 27, and body refuse press filtration, the mud cake after press filtration are completed by sludge press filtration device 27
It is collected in sludge bucket 28, and is transported outward and is disposed by automobile, filtrate then returns to desulfurization wastewater primary sedimentation tank.Clarifying basin top clear water is through acid adding
Adjust pH to 6~9 after enter film upgrading unit, the desulfurization wastewater after softening clarifying treatment can still carry a large amount of colloid and
A small amount of suspended matter is filtered processing to ensure that subsequent processing can be normally carried out using super/micro-filtration 15.Through super/micro-filtration
Treated that waste water enters high pressure reverse osmosis unit 16 for device 15, passes through two sections of Special high-voltage reverse osmosis membrane assemblies series connection (first
Section film column uses ductwork type high pressure reverse osmosis membrane assembly-STRO 17, second segment film column to use dish tubular type high pressure reverse osmosis membrane group
18) part-DTRO carries out concentration to waste water, gained fresh water collecting is in fresh water process water tank 19 and for supplementing the work of plant area
Skill water, gained concentrated water are collected in concentrated water technique water tank 20.The waste water of concentrated water technique water tank 20 is delivered to urea through waste water pump 36
Dissolving tank 21, the solvent of concentrated water are used for the dissolving of urea, and urea liquid is pumped into urea liquid storage tank through urea liquid delivery pump 37
22, urea liquid high-speed circulating module 23 is set between urea liquid storage tank 22 and urea pyrolysis stove 25, urea liquid is molten through urea
Fluid injector sprays into urea pyrolysis stove 25 to prepare denitrification reducing agent ammonia, and the solute of concentrated water is precipitated in urea pyrolysis stove, and
The ultra-clean discharge of flue gas is mixed into flue through ammonia-spraying grid 26 and boiler smoke by air shooter with the ammonia of generation is
Unite A.
The preferred embodiment of the utility model described in detail above.It should be appreciated that this field ordinary skill without
It needs creative work according to the present utility model can conceive and makes many modifications and variations.Therefore, it is all in the art
Technical staff on the basis of existing technology can by logical analysis, reasoning, or a limited experiment according to the design of the utility model
It, all should be in the protection domain being defined in the patent claims with obtained technical solution.
Claims (4)
1. a kind of coal-burning power plant environmental protection island system of collaboration zero-emission desulfurization wastewater, which is characterized in that coal-burning power plant's environmental protection island
System includes the ultra-clean exhaust system of flue gas and desulfurization wastewater zero-emission system, the ultra-clean exhaust system of flue gas include by flue according to
Secondary connected coal-burning boiler, Benitration reactor, air preheater, gas cooler, electric precipitator, air-introduced machine, wet desulphurization are inhaled
Receive tower, smoke re-heater and chimney；The desulfurization wastewater zero-emission system includes at least desulfurization wastewater pretreatment and film upgrading unit,
Concentrated water solvent reclaiming unit and concentrated water solute recovery unit；
The desulfurization wastewater pretreatment and film upgrading unit include at least the primary sedimentation tank being sequentially connected, neutralization-reaction-flocculation three
Case, clarifying basin, sludge treatment device, super/micro-filtration, high pressure reverse osmosis unit, fresh water process water tank, the conveying of mating waste water
Pump, high-pressure circulation pump and cleaning pump；
The concentrated water solvent reclaiming unit include at least by stainless steel pipes be connected concentrated water technique water tank, urea dissolving tank,
Urea liquid storage tank and urea liquid high-speed circulating module；Urea is realized using urea liquid delivery pump and urea liquid circulating pump
The transmission of solution；The concentrated water technique water tank is used to collect the concentrated water of high pressure reverse osmosis unit, and is delivered to denitration through concentrated water pump
The urea dissolving tank in urea area, the solvent of the concentrated water are used for the dissolving of urea granules；
The concentrated water solute recovery unit includes at least urea liquid injector, urea pyrolysis stove and the downstream dedusting being sequentially connected
Device collects ash bucket；
The wet desulphurization absorption tower is connected with primary sedimentation tank, and the first waste water pump is equipped between wet desulphurization absorption tower and primary sedimentation tank
With desulfurization slurry dehydration device.
2. coal-burning power plant's environmental protection according to claim 1 island system, which is characterized in that the neutralization-reaction-flocculation three
Case is equipped with medicament addition device：It neutralizes except hard case is equipped with NaOH and Na2CO3Throwing device；Reaction chamber be equipped with organic sulfur and
Flocculating agent feeding device；Flocculation tanks are equipped with flocculant and flocculation aid throwing device.
3. coal-burning power plant's environmental protection according to claim 1 island system, which is characterized in that the fresh water process water tank is for receiving
Collect the fresh water of the high pressure reverse osmosis unit, and is delivered to the consumption region of plant area's process water through fresh water pump.
4. coal-burning power plant's environmental protection according to claim 1 island system, which is characterized in that the volume of the concentrated water technique water tank
It is 2 with the ratio between the volume of the urea dissolving tank：1~5：1.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115364645A (en) * | 2022-08-01 | 2022-11-22 | 巩义市良慧环保科技有限公司 | Molecular membrane method flue gas desulfurization and decarburization system and desulfurization and decarburization method thereof |
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2017
- 2017-12-08 CN CN201721701839.3U patent/CN208049712U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115364645A (en) * | 2022-08-01 | 2022-11-22 | 巩义市良慧环保科技有限公司 | Molecular membrane method flue gas desulfurization and decarburization system and desulfurization and decarburization method thereof |
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