CN105271589A - Waste-liquid zero-discharge processing apparatus and waste-liquid processing method - Google Patents
Waste-liquid zero-discharge processing apparatus and waste-liquid processing method Download PDFInfo
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- CN105271589A CN105271589A CN201510658998.9A CN201510658998A CN105271589A CN 105271589 A CN105271589 A CN 105271589A CN 201510658998 A CN201510658998 A CN 201510658998A CN 105271589 A CN105271589 A CN 105271589A
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Abstract
The invention discloses a waste-liquid zero-discharge processing apparatus and a waste-liquid processing method. The processing apparatus comprises waste-liquid conveying equipment, a pre-settlement pool, a buffer pool, atomization equipment, a solid-liquid-gas separation device and a dedusting device; a water conveying pipe of the waste-liquid conveying equipment is connected with the pre-settlement pool, the pre-settlement pool is connected with the buffer pool, and the buffer pool is connected with the atomization equipment via a water conveying pipe; and the atomization equipment is disposed at the inlet at the top of the solid-liquid-gas separation device, and the gas outlet of the solid-liquid-gas device is connected with the dedusting device via a pipe. The processing method comprises enabling wastewater to enter the buffer pool via the pre-settlement pool, atomizing through the atomization equipment, then sending to the top inlet of the solid-liquid-gas separation device; introducing a high-temperature gas flow via the top inlet, so as to vapor water in atomized small liquid drops and obtain impurity particles, and agglomerating and forming relatively large agglomerated inclusions through high-intensity sound waste emitted by the sounding device, and enabling the agglomerated inclusions to become a stalling state and accelerate to sink through the static-pressure capacity expanding area, and discharging. Through the unique apparatus design, wastewater is furthered purified, and the purpose of zero discharge is finally reached.
Description
Technical field
The present invention relates to a kind of liquid waste treating apparatus and treatment process thereof, particularly a kind of Zero discharge treatment unit for the field such as thermoelectricity, iron and steel.
Background technology
Along with progress and the expanding economy of society, thermal power plant has been subject to the common concern of people to the pollution of atmospheric environment, and therefore effectively reducing pollutant emission to improve the impact of environment is the severe challenge that China's energy field Sustainable development faces.
At present, existing flue gas desulfurization technique comprises wet desulphurization and dry desulfurization etc.Wherein the utilization of Wet Flue Gas Desulfurization Technique is the most extensive.Wet process of FGD is the technical process that current about 85% large thermal power plant in the world adopts.Wet method fume desulfurizing system waste water due to mercury, lead, nickel, arsenic and chromium heavy metal ion content higher, the harm of directly discharge is very large, and general chemistry treatment process is too complicated again, and needs constantly to add pharmaceutical chemicals, labor intensive.Waste water chlorion (there is no chemical agent at present and can remove chlorion) after the process of another desulfurization wastewater chemical treatment method still cannot be removed.At present, existing desulfurization wastewater zero discharge treatment technology can pass through heating power method of evaporating, and the use in conjunction with electric precipitator is fixed with harmful substances, can make full use of again the object that fume afterheat reaches zero release.
Authorized announcement date is on 07 17th, 2013, Authorization Notice No. is in the Chinese patent of CN102180549B, disclose a kind of zero emission treatment of desulfured waste water, comprise the following steps: 1) desulfurization wastewater after thionizer desulfurization is entered preliminary sedimentation tank, through initial gross separation in preliminary sedimentation tank, isolated upper clear supernate is transported in Buffer Pool through slush pump; 2) by the desulfurization wastewater in Buffer Pool successively by atomisation unit and electrostatic precipitator; 3) waste water larger for preliminary sedimentation tank bottom solid content is transported to sludge buffer pool through sludge pump, the waste water that the solid content in sludge buffer pool is larger is transported to pressure filter through another sludge pump; 4) waste water after filtration is sent back in preliminary sedimentation tank through slush pump.But the flue of this zero emission treatment of desulfured waste water before electrostatic precipitator can because the salinity in desulfurization wastewater after crystallization be continual by causing ash deposit and slag buildup to block, drafting efficiency is caused to reduce, the exhaust gas volumn passed through reduces, for keeping boiler load, increase blower fan certainly will be caused to exert oneself and blower fan electric current, improve boiler controller system energy consumption, serious dust deposit in flue blocking more can cause the passive blowing out of boiler controller system; In addition, electrostatic precipitator is also because need the salinity additionally removed in a large number in desulfurization wastewater after crystallization to aggravate the ash deposit and slag buildup of electrostatic precipitator polar curve, pole plate, electrostatic precipitator current consumption is caused to increase and efficiency of dust collection reduction, the ash deposit and slag buildup of especially severe can cause the dedusting of electrostatic precipitator nearly unavailable, and not removed flue dust can by causing environmental pollution in chimney discharge beyond standards to air.
Summary of the invention
The object of the invention is to provide a kind of brand-new Zero discharge treatment unit and treatment process thereof to overcome above the deficiencies in the prior art, this device uses high-octane sound-producing device, unique static pressure dilatation design forming solid-liquid-gas separating device solves the pipeline of wastewater zero emission treatment method before cleaning apparatus that realize solid-liquid separation by high temperature evaporation because the continual ash deposit and slag buildup blocking by causing of the salinity in waste water after crystallization and cleaning apparatus are because load of dust remove rolls up the dedusting position ash deposit and slag buildup aggravation problem caused, effectively avoid increasing because ash deposit and slag buildup blocks the boiler controller system energy consumption caused, the passive blowing out of boiler controller system, the associated problem such as atmospheric polluting material discharge beyond standards such as flue dust, round Realization energy-conserving and environment-protective and waste water and gas zero release target.Utilize the above device provided to carry out the method technique of liquid waste disposal simply, save human input, do not need to add any pharmaceutical chemicals, but also make full use of fume afterheat, realize Zero discharge.
Technical scheme of the present invention is as follows:
A kind of Zero discharge treatment unit, comprise waste liquid handling equipment, preliminary sedimentation tank, Buffer Pool, atomising unit, solid-liquid-gas separating device and cleaning apparatus, wherein the hydraulic pipe of waste liquid handling equipment self stretches to preliminary sedimentation tank inside, preliminary sedimentation tank is connected with Buffer Pool, and Buffer Pool is connected with atomising unit by induction pipe; Solid-liquid-gas separating device comprises top inlet, range of atomization is provided with below top inlet, static pressure dilatation district is provided with below range of atomization, the circulation area in static pressure dilatation district is greater than the circulation area of range of atomization, bottom, static pressure dilatation district arranges ash output hole, side, static pressure dilatation district is provided with pneumatic outlet, and gas outlet arranges sound reflection homogenizing plate, and solid-liquid-gas separating device inside is provided with sound-producing device; Atomising unit is arranged at solid-liquid-gas separating device top inlet place, and the pneumatic outlet of solid-liquid-gas separating device is connected with cleaning apparatus by pipeline.
Described Zero discharge treatment unit, waste liquid handling equipment comprises slush pump and hydraulic pipe.
Described Zero discharge treatment unit, waste liquid handling equipment also comprises decompression current equalizer, and the current equalizer that wherein reduces pressure is arranged at the water delivery exit of hydraulic pipe.
Described Zero discharge treatment unit, described decompression current equalizer is to hydraulic pipe end dilatation mineralization pressure buffer zone gradually, and the orifice plate that one or more layers has even percentage of perforation is set in pressure buffer district, make the liquid pressure-reducing flowed out in hydraulic pipe slow down and carry out current-sharing by orifice plate.
Described Zero discharge treatment unit, cleaning apparatus is electrostatic precipitator or sack cleaner.
Described Zero discharge treatment unit, preliminary sedimentation tank is connected with Buffer Pool by the first strainer.
Described Zero discharge treatment unit, is provided with agitator in preliminary sedimentation tank.
Described Zero discharge treatment unit, solid-liquid-gas separating device top inlet place is provided with external pipe interface.
Described Zero discharge treatment unit, is provided with grout outlet bottom preliminary sedimentation tank, is connected with out sizing device below grout outlet, go out sizing device by upper and lower valve and between arrange bulk cement storage tank form.
Described Zero discharge treatment unit, induction pipe is provided with the second strainer.
Described Zero discharge treatment unit, induction pipe is provided with well heater.
Described Zero discharge treatment unit, atomising unit comprises high-pressure pump, air compressor machine, atomization conduit and atomizing nozzle.
Described Zero discharge treatment unit, sound-producing device comprises acoustic generator, acoustic conducting pipe and Controlling System, and wherein Controlling System controls acoustic generator sounding, and the sound wave sent is sent out by acoustic conducting pipe.
Described Zero discharge treatment unit, sound-producing device is arranged in range of atomization or the junction in range of atomization and static pressure dilatation district, and the acoustic conducting pipe of sound-producing device is arranged on the inside panel of solid-liquid-gas separating device, and the quantity that sound-producing device is arranged is one or more.
Described Zero discharge treatment unit, sound reflection homogenizing plate is made up of the bilayer of top perforate, bottom not perforate or multi-ply wood, and there is gap between different laminate, hole adopts the mode of Heterogeneous Permutation to distribute on different laminate;
Described Zero discharge treatment unit, is provided with ash discharging gear below ash output hole, ash discharging gear by upper and lower valve and between arrange bulk cement storage tank form.
Described Zero discharge treatment unit, gas outlet is provided with temperature sensor and humidity sensor, is provided with dust content detector in the pipeline that solid-liquid-gas separating device is connected with cleaning apparatus.
The treatment process of above-described Zero discharge treatment unit, comprises the following steps:
Step one, delivers in preliminary sedimentation tank by waste liquid handling equipment by waste liquid, and the top waste water carry out preliminary sedimentation in preliminary sedimentation tank after enters in Buffer Pool;
Step 2, the waste water in Buffer Pool is atomized through atomising unit, and the solid-liquid mixing small droplets after atomization declines from top inlet;
Step 3, high temperature gas flow is passed into by the moisture evaporation in the most of small droplets after atomization from the top inlet of solid-liquid-gas separating device to range of atomization, obtain salinity crystal fine grain, the small droplets that these salinity crystal fine grains evaporate together with the contaminant particles in high temperature gas flow and having little time on a small quantity the high strong sound wave strong disturbance that sends by sound-producing device and constantly condense the larger reunion wrap of formation, these wraps accelerate because quality increases;
Step 4, when wrap enters static pressure dilatation district by range of atomization, owing to entering suddenly the larger space of circulation area, causes it to enter stall conditions and accelerates, and the final ash output hole that arrives is discharged;
Step 5, the water vapor that evaporation is formed is along with comparatively clean air-flow is by carrying out further dedusting through piping arrival cleaning apparatus after the current-sharing of sound reflection homogenizing plate.
Design and the principle of work of Zero discharge treatment unit provided by the invention are as follows:
(1) in power plant's waste treatment process, waste liquid is atomized through atomising unit after precipitation, filtration, waste liquid becomes vaporific solid-liquid mixing small droplets, thus can realize fully contacting with flue gas flow, after solid-liquid mixing small droplets makes full use of fume afterheat, clean moist part is arrived cleaning apparatus by high temperature evaporation with flue gas flow, remaining salinity crystallisate, achieves solid-liquid-gas and is separated.
(2) the acoustic pressure reactive force that the strong sound wave of certain frequency produces is utilized, the a small amount of liquid mist droplet having little time to evaporate originally mutually can't touch can be made, in waste liquid, moisture is evaporated contaminant particles in rear remaining salinity particulate and flue gas flow due to judder and mutually collides, and mutually parcel is condensed into larger containing wet granulation, to be affected by gravity factor by these larger particulate matter itself again and drop to ash output hole, and then collect further, can effectively avoid at pipeline generation dust stratification stopping state like this, greatly alleviate cleaning apparatus dedusting position ash deposit and slag buildup situation, reduce boiler controller system energy consumption, significantly improve cleaning apparatus efficiency of dust collection, reduce and comprise PM10, PM2.5 is in the discharge of interior relevant atmospheric pollutent.
(3) by arranging static pressure dilatation district in solid-liquid-gas separating device, play current stabilization, current-sharing, minimizing airstream vibration, eliminate eddy effect, and make to sweep along when the flue gas flow containing wet granulation that acoustic wave action is formed arrives static pressure dilatation district because enter in the space of more books circulation area suddenly, speed bust is caused to enter stall conditions, add that affecting nature by self gravitation declines, these are detained also all to settle down containing wet granulation in static pressure dilatation district is discharged by the ash output hole of bottom.
(4) after the process of static pressure dilatation district, comparatively clean flue gas has been become from the pneumatic outlet flue gas out of solid-liquid-gas separating device, this flue gas carries out dedusting by entering cleaning apparatus by pipeline after the current-sharing of sound reflection homogenizing plate, flue gas after current-sharing can avoid local scaling problem in pipeline well, improves device utilising efficiency.
(5) solid-liquid-gas separating device gas outlet is provided with sound reflection homogenizing plate, its do not affect flue gas flow normal through, but the high strong sound wave high-efficiency reflective that sound-producing device can be sent is returned, thus reduce the loss of acoustic wave energy, improve the utilization ratio of acoustic wave energy, and enhancement is in the high-strength acoustic wave energy of particle coagulation.Be specially sound reflection homogenizing plate by after double-deck or multi-ply wood local misalignment perforated design, air-flow is evenly arrived cleaning apparatus by pipeline afterwards by twice or repeatedly uniform in very short distance, avoids the cleaning apparatus dedusting position ash deposit and slag buildup aggravation phenomenon caused because air flow method is uneven.In addition, sound wave is not because being reflected back through the plate of dislocation perforation, and in field, acoustic energy is enhanced.
(6) present invention employs sound-producing device, range of atomization and static pressure dilatation district combine and sound reflection homogenizing plate three kinds designs combination to play synergy, send Frequency Adjustable height strong sound wave by sound-producing device and promote particle coagulation, range of atomization and static pressure dilatation district combine and cause the solid particulate after condensing produce stall and accelerate, high strong sound wave high-efficiency reflective is returned by sound reflection homogenizing plate, reduce acoustic wave energy loss, improve acoustic wave energy utilization ratio, thus enhancement is in the high-strength acoustic wave energy of particle coagulation, improve particle coagulation effect, the homogenizing plate of sound reflection simultaneously can make the flue gas of discharging reach equal fluidisation, the final flue gas realizing discharging cleans and flue gas homogenizing arrives in cleaning apparatus, avoid ash deposit and slag buildup blocking and cleaning apparatus that the pipeline of wastewater zero emission treatment method before cleaning apparatus that realize solid-liquid separation by high temperature evaporation cause because of continual the passing through of salinity in waste water after crystallization because load of dust remove rolls up the problem of the dedusting position ash deposit and slag buildup aggravation caused, round Realization energy-conserving and environment-protective and waste water and gas zero release target.
Compared with prior art, Zero discharge device provided by the invention and treatment process thereof have following beneficial effect:
1, the present invention can carry out zero discharge treatment to the waste water of association area very easily, and technique is simple, does not need to use any pharmaceutical chemicals, saves manpower.
2, the present invention makes full use of fume afterheat, is substantially evaporated the waste water of heavily contaminated, realizes solid-liquid, solid and gas is separated, and improve flue gas enter cleaning apparatus before humidity, be conducive to improving the dust removing effects of cleaning apparatus.
3, in existing waste water zero-discharge technology, after the salinity crystallisate obtained by high temperature evaporation realizes solid-liquid separation, salinity crystallisate arrives cleaning apparatus rely on cleaning apparatus to remove salinity crystallisate by pipeline along with flue gas flow, cause dust deposited in pipeline fouling and clogging and aggravate cleaning apparatus ash deposit and slag buildup, causing the increase of boiler controller system energy consumption, passive blowing out, atmospheric polluting material discharge beyond standards etc. to be difficult to the problem overcome.In the present invention, salinity crystal fine grain in waste water, contaminant particles in flue gas and the liquid mist having little time on a small quantity to evaporate promote particle coagulation at high strong sound wave, static pressure dilatation causes solid particulate stall to be sunk, under the three aspect factor comprehensive actions such as terrestrial gravitation, salinity crystallisate in waste water and the impurity in flue gas and a small amount of liquid mist form reunion wrap and drop at ash output hole, and then carry out collection and outer row further, such design effectively can avoid the situation in the blocking of pipeline generation dust stratification, in addition, because salinity crystallisate no longer enters cleaning apparatus, and the impurity entering cleaning apparatus in flue gas also greatly reduces, cleaning apparatus is because load of dust remove significantly reduces and causes dedusting position ash deposit and slag buildup situation greatly to alleviate, boiler controller system energy consumption reduces, passive blowing out situation has not existed, atmospheric polluting material is discharge beyond standards no longer.
4, the heterogeneous combination separate design of solid-liquid-gas separating device.Waste water in Buffer Pool is atomized the vaporific solid-liquid mixing small droplets of rear formation, and under the effect of high-temperature flue gas, the moisture heating evaporation in solid-liquid mixing small droplets forms water vapour and arrives cleaning apparatus with getting rid of the comparatively clean flue gas flow after impurity.Mutually collide under the effect of the high-strength acoustic wave energy that the salinity crystal fine grain in waste water, the contaminant particles in flue gas and the liquid mist having little time on a small quantity to evaporate constantly send at sound-producing device, and mutually parcel is condensed into larger containing wet granulation, under gravity, the wet granulation that contains more greatly of parcel cohesion is mutually separated with flue gas flow gradually and sinks down into ash output hole.Range of atomization and arranging of static pressure dilatation district can cause solid particulate accelerate because falling off and drop to ash output hole as much as possible, thus the heterogeneous combination realizing solid-liquid-gas is separated.
5, the present invention is by the index such as temperature, humidity, ash content of on-line monitoring by the Commodity flow of solid-liquid-gas separating device, can better automatically control and regulate the work operating parameter of the associated components such as well heater, sound-producing device, high-pressure pump, the operating performance of single unit system is better, and running cost is lower, level of automation is higher.
6, system architecture of the present invention is compact, and method is implemented simple, and can realize wastewater zero discharge truly, and not only environmental protection but also safety, have promotional value.
Accompanying drawing explanation
Fig. 1 is the Zero discharge treatment unit schematic diagram described in the embodiment of the present invention 1;
Fig. 2 is the Zero discharge treatment unit schematic diagram described in the embodiment of the present invention 2;
In above Fig. 1-Fig. 2, 1 is waste liquid handling equipment, 11 is slush pump, 12 is hydraulic pipe, 13 is decompression current equalizer, 2 is preliminary sedimentation tank, 21 for going out sizing device, 22 is agitator, 3 is the first strainer, 4 is Buffer Pool, 5 is induction pipe, 51 is the second strainer, 52 is well heater, 6 is atomising unit, 61 is high-pressure pump, 62 is air compressor machine, 7 is solid-liquid-gas separating device, 71 is range of atomization, 72 is static pressure dilatation district, 73 is sound-producing device, 74 is sound reflection homogenizing plate, 75 is temperature sensor, 76 is humidity sensor, 77 is ash output hole, 78 is ash discharging gear, 8 is pipeline, 81 is dust content detector, 9 is cleaning apparatus, 10 is external pipe interface, I is that waste liquor stream is through direction, II is that external gas flows through direction.
Embodiment:
By the following examples Zero discharge treatment unit provided by the invention is further described.
Embodiment 1
As shown in Figure 1, for the Zero discharge treatment unit schematic diagram provided in embodiment, can find out, whole device comprises waste liquid handling equipment 1, preliminary sedimentation tank 2, Buffer Pool 4, atomising unit 6, solid-liquid-gas separating device 7 and cleaning apparatus 9, wherein the hydraulic pipe 12 of waste liquid handling equipment 1 self stretches to preliminary sedimentation tank 2 inside, preliminary sedimentation tank 2 is connected with Buffer Pool 4, and Buffer Pool 4 is connected with atomising unit 6 by induction pipe 5; Atomising unit comprises high-pressure pump 61, air compressor machine 62 and atomization conduit and atomizing nozzle; Solid-liquid-gas separating device 7 comprises top inlet, range of atomization 71 is provided with below top inlet, static pressure dilatation district 72 is provided with below range of atomization 71, the circulation area in static pressure dilatation district 72 is greater than the circulation area of range of atomization 71, bottom, static pressure dilatation district 72 arranges ash output hole 77, side, static pressure dilatation district 72 is provided with pneumatic outlet, and gas outlet arranges sound reflection homogenizing plate 74, and solid-liquid-gas separating device 7 inside is provided with sound-producing device 73; Atomising unit 6 is arranged at solid-liquid-gas separating device 7 top inlet place, and the pneumatic outlet of solid-liquid-gas separating device 7 is connected with cleaning apparatus 9 by pipeline 8.
First waste liquid is delivered in preliminary sedimentation tank 2 by waste liquid handling equipment 1 by this device in the process run, top waste water carry out preliminary sedimentation in preliminary sedimentation tank 2 after enters in Buffer Pool 4, waste water in Buffer Pool 4 carries out being atomized (I is waste water approach axis) through atomising unit 6, atomising unit 6 is owing to being arranged at solid-liquid-gas separating device 7 top inlet place, and the solid-liquid mixing small droplets therefore after atomization declines from top inlet.Pass into high temperature gas flow (II is air-flow approach axis) by the moisture evaporation in the most of small droplets after atomization from solid-liquid-gas separating device 7 top inlet simultaneously, obtain salinity crystal fine grain, the small droplets that these salinity crystal fine grains evaporate together with the contaminant particles in air-flow and having little time on a small quantity the high strong sound wave strong disturbance that sends by sound-producing device 73 and constantly condense the larger reunion wrap of formation, these wraps accelerate because quality increases, when these wraps enter static pressure dilatation district 72 by range of atomization 71, owing to entering suddenly the larger space of circulation area, cause it to enter stall conditions and accelerate, final arrival ash output hole 77 is discharged.The water vapor that evaporation is formed carries out further dedusting by arriving cleaning apparatus 9 through piping 8 after sound reflection homogenizing plate 74 current-sharing along with comparatively clean air-flow.
Embodiment 2
As shown in Figure 2, for the Zero discharge treatment unit schematic diagram provided at the present embodiment, can find out, it has carried out further improvement on the basis of embodiment 1, wherein waste liquid handling equipment 1 comprises slush pump 11, hydraulic pipe 12 and decompression current equalizer 13, decompression current equalizer 13 is arranged at the water delivery exit of hydraulic pipe 12, this decompression current equalizer 13 pairs of hydraulic pipe 12 end dilatation mineralization pressure buffer zones gradually, and the orifice plate that one or more layers has even percentage of perforation is set in pressure buffer district, the liquid pressure-reducing flowed out in hydraulic pipe 12 is made to slow down and carry out current-sharing by orifice plate.Waste water enters preliminary sedimentation tank 2 after decompression current-sharing, thus is more conducive to the precipitation of waste water in preliminary sedimentation tank 2.Grout outlet is provided with bottom preliminary sedimentation tank 2, sizing device 21 is connected with out below grout outlet, precipitation in preliminary sedimentation tank 2 can be cleared up, and go out sizing device 21 by upper and lower valve and between connect setting bulk cement storage tank form, can carry out periodicity discharge by controlling upper and lower valve to the throw out in preliminary sedimentation tank 2, the setting of upper and lower valve and middle bulk cement storage tank is advantageously in sedimentary flexible discharge simultaneously.Be provided with agitator 22 in preliminary sedimentation tank 2, can waste water wherein be at the uniform velocity stirred, make precipitation evenly; Between preliminary sedimentation tank 2 and Buffer Pool 4, be provided with the first strainer 3, preliminary sedimentation tank 2 is connected with Buffer Pool 4 by the first strainer 3, tentatively can filter like this to the waste water after precipitation; Hydraulic pipe 5 is provided with the second strainer 51 and well heater 52, object is to arrange the second strainer 51 can solia particle further in filtered wastewater and macromolecular substance, in the process that reality uses, the first strainer 3 can as primarily efficient filter, and the second strainer 51 can, as medium air filtration, make waste water can carry out later stage atomization and dedusting better by twice filtration.Well heater 52 may be used for high temperature gas flow temperature inadequate time preheating is carried out to waste water, thus ensure the carrying out smoothly of evaporative process.
In the present embodiment, sound-producing device comprises Frequency Adjustable high-intensity sound wave, acoustic conducting pipe and Controlling System, wherein Controlling System controls sonic generator sounding, the parameters such as the different audible frequency of sonic generator and time can be set simultaneously, the sound wave that sonic generator sends is sent out by acoustic conducting pipe, wherein acoustic conducting pipe can be set as tubaeform, better makes sound wave spread.Sound-producing device in the present embodiment is provided with two, be respectively the first sound-producing device 731 and the second sound-producing device 732, arranging sound-producing device at different positions can make acoustic wave action strengthen, in actual use multiple sound-producing device can be set as required, and each sound-producing device sounding power is 10000-30000 watt, audible frequency is 30-300Hz, can send the sound wave of different frequency range, can make to produce between different sound wave to interact further to promote to form wrap.Sound-producing device is arranged at the connecting zone in range of atomization 71 or range of atomization 71 and static pressure dilatation district 72, is preferably arranged at by the acoustic conducting pipe of sound-producing device on the inwall of solid-liquid-gas separating device 7, can ensures that sound wave acts on droplet to greatest extent.In the present embodiment, sound reflection homogenizing plate 74 is made up of the bilayer of top perforate, bottom not perforate or multi-ply wood, gap is there is between different laminate, hole adopts the mode of Heterogeneous Permutation to distribute on different laminate, this setup can play current balance function to the high temperature gas flow passed through well, sound wave then can be reflected back well, thus reaches effective current-sharing and at utmost utilize the effect of sound wave.Ash output hole 77 is below provided with ash discharging gear 78, ash discharging gear 78 by upper and lower valve and between the bulk cement storage tank that arranges form, ash quantity can be controlled out easily and transport in time.The gas outlet of solid-liquid-gas separating device 7 is provided with temperature sensor 75 and humidity sensor 76, dust content detector 81 is provided with in the pipeline 8 that solid-liquid-gas separating device 7 is connected with cleaning apparatus 9, can detect running status in actual moving process, real-time adjust operation parameter, reaches efficient dedusting, scale removal and impurity-eliminating effect; Solid-liquid-gas separating device 7 top inlet place is provided with external pipe interface 10, externally can pass into the pipeline of high temperature gas flow; Cleaning apparatus 9 can be electrostatic precipitator or sack cleaner, can use select according to reality.Device provided by the invention can be good at disposing waste liquid and can carry out purifying and dedusting to external high temperature gas flow simultaneously, reaches the effect of multinomial synchronous processing.
Embodiment 3
Adopt Zero discharge treatment unit provided by the invention for certain power plant 1000MW generator set desulfurization waste water, the concrete treatment process of carrying out Zero discharge treatment unit provided by the invention is described.Specifically comprise the following steps:
(1) desulfurization wastewater after thionizer desulfurization is arrived preliminary sedimentation tank 2 by hydraulic pipe 12 by slush pump 11 after decompression current equalizer 13 slows down current-sharing, at the uniform velocity stirring through agitator 22 in preliminary sedimentation tank 2 makes precipitation distribution more even, and the upper clear supernate after preliminary sedimentation is separated arrives Buffer Pool 4 after the first strainer 3 filters.
(2) waste water in Buffer Pool 4 is transported to atomization conduit by high-pressure pump 61 by induction pipe 5 after the second strainer 51 filters, air compressor machine 62 is connected with atomizing nozzle, air compressor machine 62 produces a large amount of pressurized air, under the acting in conjunction of high-pressure pump 61 and air compressor machine 62, waste water is atomized the solid-liquid mixing small droplets that nozzle atomization nebulizes.
(3) vaporific solid-liquid mixing small droplets enters in the range of atomization 71 of solid-liquid-gas separating device 7, in the flue that extension tube attached pipeline joint 10 connects high-temperature flue gas stream effect under, moisture heating evaporation, the high strong sound wave strong disturbance that the salinity crystal fine grain in small droplets, the contaminant particles in flue gas and liquid mist two sound-producing devices 731 and 732 that are fixed on wall panel when flue gas flow advances having little time on a small quantity to evaporate send and constantly condense the larger reunion wrap of formation.Sound-producing device institute sounding power regulates arbitrarily between 10000-30000 watt, and audible frequency regulates arbitrarily between 30-300Hz.
(4), after the larger reunion wrap condensed arrives static pressure dilatation district 72, under circulation area increases suddenly the synergy causing the factors such as stall sinking, terrestrial gravitation, aggravation falls to ash output hole 77 place.
(5) water vapour that the waste water evaporated is formed arrives cleaning apparatus 9 (being electrostatic precipitator in the present embodiment) with comparatively clean flue gas flow by even after sound reflection homogenizing plate 74, the high strong sound wave that sound-producing device 731 and 732 sends is reflected to strengthen the energy of high strong sound wave by sound reflection homogenizing plate 74, reduce the loss of acoustic wave energy.
(6) preliminary sedimentation tank 2 below connects sizing device 21, and when the useless slurry that the solid content precipitated when preliminary sedimentation tank 2 bottom is high is too much, open out the upper valve of sizing device 21, the useless slurry in preliminary sedimentation tank 2 flows in slurry can; When slurry can is filled with useless slurry, closes out the upper valve of sizing device 21, open out the lower valve of sizing device 21, useless slurry realization is outer arranges and transports.
(7) ash discharging gear 78 that connects below of ash output hole 77, when the lime-ash precipitated when ash output hole 77 place is too much, open the upper valve of ash discharging gear 78, lime-ash drops in bulk cement storage tank; When bulk cement storage tank is filled with lime-ash, closes the upper valve of ash discharging gear 78, open lower valve, lime-ash is arranged and transports outside realizing.
(8) wall panel near the sound reflection homogenizing plate 74 of gas outlet is fixed with in temperature sensor 75, humidity sensor 76, pipeline 8 and is provided with dust content detector 81; When temperature sensor 75 senses that flue temperature is inadequate, export electrical signal to PLC and by PLC control heater 52 startup heating; When humidity sensor 76 senses flue excess moisture, export electrical signal to PLC and by PLC control sound-producing device 73 improve sounding power; When dust content detector 81 senses that ash content is too high, export electrical signal to PLC and by PLC control high-pressure pump 61 improve pump water pressure.
Claims (17)
1. a Zero discharge treatment unit, is characterized in that, comprises waste liquid handling equipment (1), preliminary sedimentation tank (2), Buffer Pool (4), atomising unit (6), solid-liquid-gas separating device (7) and cleaning apparatus (9); Wherein the hydraulic pipe (12) of waste liquid handling equipment (1) self stretches to preliminary sedimentation tank (2) inside, and preliminary sedimentation tank (2) is communicated with Buffer Pool (4), and Buffer Pool (4) is connected with atomising unit (6) by induction pipe (5); Solid-liquid-gas separating device (7) comprises top inlet, range of atomization (71) is provided with below top inlet, below, range of atomization (71) is provided with static pressure dilatation district (72), the circulation area in static pressure dilatation district (72) is greater than the circulation area of range of atomization (71), static pressure dilatation district (72) bottom arranges ash output hole (77), static pressure dilatation district (72) side is provided with pneumatic outlet, and gas outlet arranges sound reflection homogenizing plate (74); Solid-liquid-gas separating device (7) inside is provided with sound-producing device (73); Atomising unit (6) is arranged at solid-liquid-gas separating device (7) top inlet place, and the pneumatic outlet of solid-liquid-gas separating device (7) is connected with cleaning apparatus (9) by pipeline (8).
2. Zero discharge treatment unit according to claim 1, is characterized in that, waste liquid handling equipment (1) comprises slush pump (11) and hydraulic pipe (12).
3. Zero discharge treatment unit according to claim 2, is characterized in that, waste liquid handling equipment (1) also comprises decompression current equalizer (13), and the current equalizer (13) that wherein reduces pressure is arranged at the water delivery exit of hydraulic pipe (12).
4. Zero discharge treatment unit according to claim 3, it is characterized in that, described decompression current equalizer (13) is to hydraulic pipe (12) end dilatation mineralization pressure buffer zone gradually, and the orifice plate that one or more layers has even percentage of perforation is set in pressure buffer district, make the liquid pressure-reducing flowed out in hydraulic pipe (12) slow down and carry out current-sharing by orifice plate.
5. Zero discharge treatment unit according to claim 1, is characterized in that, cleaning apparatus (9) is electrostatic precipitator or sack cleaner.
6. Zero discharge treatment unit according to claim 1, is characterized in that, preliminary sedimentation tank (2) is connected with Buffer Pool (4) by the first strainer (3).
7. Zero discharge treatment unit according to claim 1, is characterized in that, is provided with agitator (22) in preliminary sedimentation tank (2).
8. Zero discharge treatment unit according to claim 1, is characterized in that, solid-liquid-gas separating device (7) top inlet place is provided with external pipe interface (10).
9. Zero discharge treatment unit according to claim 1, it is characterized in that, preliminary sedimentation tank (2) bottom be provided with grout outlet, be connected with out sizing device (21) below grout outlet, go out sizing device (21) by upper and lower valve and between arrange bulk cement storage tank form.
10. Zero discharge treatment unit according to claim 1, is characterized in that, induction pipe (5) is provided with the second strainer (51).
11. Zero discharge treatment unit according to claim 1, is characterized in that, induction pipe (5) are provided with well heater (52).
12. Zero discharge treatment unit according to claim 1, is characterized in that, atomising unit (6) comprises high-pressure pump (61), air compressor machine (62), atomization conduit and atomizing nozzle.
13. Zero discharge treatment unit according to claim 1, is characterized in that, sound-producing device (73) comprises acoustic generator, acoustic conducting pipe and Controlling System.
14. Zero discharge treatment unit according to claim 13, it is characterized in that, sound-producing device (73) is arranged in range of atomization (71) or the junction in range of atomization (71) and static pressure dilatation district (72), the acoustic conducting pipe of sound-producing device is arranged on the inside panel of solid-liquid-gas separating device (7), and the quantity that sound-producing device is arranged is one or more.
15. Zero discharge treatment unit according to claim 1, it is characterized in that, sound reflection homogenizing plate (74) is made up of the bilayer of top perforate, bottom not perforate or multi-ply wood, and there is gap between different laminate, hole adopts the mode of Heterogeneous Permutation to distribute on different laminate;
Zero discharge treatment unit according to claim 1, is characterized in that, ash output hole (77) is below provided with ash discharging gear (78), ash discharging gear (78) by upper and lower valve and between the bulk cement storage tank that arranges form.
16. Zero discharge treatment unit according to claim 1, it is characterized in that, gas outlet is provided with temperature sensor (75) and humidity sensor (76), is provided with dust content detector (81) in the pipeline (8) that solid-liquid-gas separating device (7) is connected with cleaning apparatus (9).
The treatment process of 17. Zero discharge treatment unit according to claim 1, is characterized in that, comprise the following steps:
Step one, delivers in preliminary sedimentation tank (2) by waste liquid handling equipment (1) by waste liquid, and the top waste water carry out preliminary sedimentation in preliminary sedimentation tank (2) after enters in Buffer Pool (4);
Step 2, the waste water in Buffer Pool (4) is atomized through atomising unit (6), and the solid-liquid mixing small droplets after atomization declines from top inlet;
Step 3, high temperature gas flow is passed into by the moisture evaporation in the most of small droplets after atomization from the top inlet of solid-liquid-gas separating device (7) to range of atomization (71), obtain salinity crystal fine grain, the small droplets that these salinity crystal fine grains evaporate together with the contaminant particles in high temperature gas flow and having little time on a small quantity the high strong sound wave strong disturbance that sends by sound-producing device (73) and constantly condense the larger reunion wrap of formation, these wraps accelerate because quality increases;
Step 4, when wrap enters static pressure dilatation district (72) by range of atomization (71), owing to entering suddenly the larger space of circulation area, causes it to enter stall conditions and accelerates, and finally arrives ash output hole (77) and discharges;
Step 5, the water vapor that evaporation is formed is along with comparatively clean air-flow is by carrying out further dedusting through piping (8) arrival cleaning apparatus (9) after sound reflection homogenizing plate (74) current-sharing.
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| CN109557062A (en) * | 2018-12-10 | 2019-04-02 | 徐州工程学院 | A kind of desulfurization wastewater drop evaporation test device and test method |
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