CN208200433U - A kind of UTILIZATION OF VESIDUAL HEAT IN coordinated desulfurization wastewater zero discharge and the device for removing plume - Google Patents

Abstract

The utility model discloses a kind of UTILIZATION OF VESIDUAL HEAT IN coordinated desulfurization wastewater zero discharge and remove the device of plume, device includes boiler, air preheater, deduster, desulfurizing tower and the chimney for passing sequentially through pipeline connection, effluent settling chamber, Waste water concentrating tower, waste water flash column are connected in device on relevant device simultaneously, waste water flash column and Waste water concentrating tower during the work time needed for high-temperature gas be derived from the high-temperature flue gas in device operational process；Generated gas is sent into deduster and is dusted circulation.Setting acoustic agglomeration device and demister in connecting pipe between desulfurizing tower and chimney.Desulfurization wastewater is subjected to high temperature concentration and flash distillation using the high-temperature flue gas in device operational process itself, the gas after concentration and flash distillation is finally re-fed into device to recycle, realize zero-emission, discharge plume is reduced using reduced flue-gas temperature collaboration acoustic agglomeration and demister simultaneously, realizes energy conservation and environmental protection, the target of wastewater zero discharge and reducing discharge of waste gases comprehensively.

Description

A kind of UTILIZATION OF VESIDUAL HEAT IN coordinated desulfurization wastewater zero discharge and the device for removing plume

Technical field

The utility model, which belongs to, to be realized desulfurization wastewater zero-emission using fume afterheat and goes the technical field of plume, is especially related to And a kind of UTILIZATION OF VESIDUAL HEAT IN coordinated desulfurization wastewater zero discharge and the device for removing plume.

Background technique

Under coal-burning power plant's wastewater zero discharge background, in order to improve the comprehensive utilization ratio of water, recirculated water, sewerage, reverse osmosis The power plant effluents such as saturating concentrated water are all pooled to desulphurization system, therefore desulfurization waste water quality is very poor, the attributes such as high salinity, perishable Environment is caused to seriously affect, at present power plant use three header method precipitation and separation pollutants, but be difficult to remove the salt in waste water, Cl^—, organic matter, heavy metal etc., this waste water outlet generates serious pollution to environment.For this phenomenon, those skilled in the art Carry out the research of some experimental technique of zero discharge, such as: co-evaporation crystallization, flue or evaporating column flash distillation is concentrated in film, but There are more defects: operation and maintenance cost height, the easy fouling of equipment, pipeline easily blocks, operational reliability is poor, to power plant's coal consumption Influence big etc., seriously affect the implementation of desulfurization wastewater zero-emission, thus seek it is a kind of efficiently, energy conservation, can stable operation desulfurization Process without drainage of waste water route is very urgent.

" white plume " on environmental quality although influence less, to influence environment sense organ, need to be administered.It is main at present " white cigarette " is eliminated using directly heating to desulfurizing tower exiting flue gas, this will increase the energy consumption of unit.The increase of coal consumption Brought pollution more than coloured plume administer reduction sewage it is serious more, it is therefore desirable to explore a kind of reasonable energy-efficient side Formula realizes " going white " task.

Application No. is 201610031262.3 patents to propose the device using fume afterheat processing desulfurization wastewater, this is System is one evaporation concentration device of setting between electric precipitation and desulfurizing tower, extracts desulfurization wastewater by water pump and enters evaporation and concentration Device completes Waste water concentrating processing, and solution is delivered to the atomization flash distillation of the flue between air preheater and deduster, salinity knot It is captured to enter in flyash by deduster after crystalline substance and realizes wastewater zero discharge.It should include evaporation concentration device, solution collecting pit, water pump And nozzle etc., the technology advantageous effects are the chemical agents for saving Conventional waste water processing addition, and it is straight to overcome waste water Connect the big problem of spraying flue gas consumption.The shortcomings that technology is that desulfurization wastewater is pre-processed without sedimentation, and gypsum etc. contains in waste water Gu rate is up to 3%-5%, as the depth of waste water is concentrated, solid content, viscosity, salt content of waste water etc. are higher；When solution is spraying Nozzle easily blocks, and atomizing effect is poor, and the processing capacity of flash distillation is greatly lowered；And because the technology is in flue directly by waste water Solution atomization flash distillation, since smoke temperature reduces after desulfurization wastewater is spraying, smoke moisture increases, so that the waste water crystal in flue And the aggravation reunion sedimentation of flying dust solid, it under inevitably flue gas action of turbulent flow, can touch on walling of flue, it is curved that spy is standby At road, the fouling in conjunction with flying dust of salt in flue gas, according to the field data show of Inner Mongol power plant, is used on walling of flue The process desulfurization wastewater can reach 30mm or more in fouling thickness one day in flue.

It proposes to give up to desulfurization in concentration tower using the flue gas after deduster application No. is 201710370314.4 patent Water heating concentration, the desulfurization wastewater after concentration uses the high-temperature flue gas atomization and vaporization after denitration in crystallizing tower, thin after crystallization Little particle or salt enter deduster under flue gas drive, finally realize wastewater zero discharge.The technology makes full use of the heat of flue gas Amount processing desulfurization wastewater, operating cost is lower and avoids deduster etching problem.The technology also has disadvantage: the sudden strain of a muscle of desulfurization wastewater It steams heat source used in crystallizing and is derived from the high-temperature flue gas after denitration, the heat of consumption can reduce the heat exchange efficiency of boiler again.With For 300MW unit, when handling desulfurization wastewater zero-emission using high-temperature flue gas, the high-temperature flue gas amount of one ton of waste water consumption is evaporated about For 8000-12000Nm³/ h, the interior desulfurization wastewater generated of processing system need to consume the 3-5% that high-temperature flue gas amount accounts for about total exhaust gas volumn, By 4-6 DEG C under hot blast temperature, unit coal consumption increase about 0.8-1.2g/kWh.

Application No. is 201710457317.1 patent propose it is a kind of using preposition heat exchanger combination rear end deduster Method handles desulfurization wastewater, specific method are as follows: take the high-temperature flue gas access tube between partial denitrification device and air preheater Shell heat exchanger heats air, and the hot-air after heating is mixed with the atomized drop in spray evaporation tower, heated liquid evaporation analysis Salts substances out, salinity enter bag filter with air and are collected processing, and the air main flue gas of bag filter discharge converges It is passed through processing in desulfurizing tower.The advantages of technology is indirectly to realize wastewater zero discharge using flue gas heat, evaporates consolidating for generation Body crystal is recycled by the bag filter processing being separately provided, and avoids desulfurization wastewater bring secondary pollution.But it should The part high-temperature flue gas that air preheater front end is utilized in technology heats air as heat source, then using the air after heating as heat The flash process of waste water is completed in source, actually a kind of transmitting of energy, the heat of final waste water evaporation consumption still from High-temperature flue gas, the consumption of high-temperature flue gas will affect the decline of boiler efficiency；The dust content of air preheater front end is big simultaneously, When by shell-and-tube heat exchanger, flying dust easily deposits and blocks heat exchange pipeline, further shadow in the elbow of heat exchanger in flue gas Ringing heat exchange efficiency even causes operating condition unstable.The problems such as line clogging easily occurs；Sky after being heated using high-temperature flue gas Gas imports flue collector system after completing waste water flash distillation, increases the load of flue gas subsequent processing.

Application No. is 201710264441.6 patents to propose that first passing through coolant media in pipeline after desulfurizing tower reduces flue gas Then temperature cooperates with demisting water lift means to complete gas-liquid separation, the final method for realizing drop plume by acoustic agglomeration.The technology The technical issues of effective solution traditional heat exchange water lift low efficiency, the part for realizing water resource utilize and flue gas in it is subtle The further removal of particulate matter.But the technology increases refrigerant cooling device, by taking 300MW unit as an example, total flue-gas temperature decline At 4-5 DEG C, need to consume cooling water inflow is 60-80t/h, and not only water consumption is big and equipment volume is big, the operating cost and throwing of system It is higher to provide cost, while will increase the running resistance of unit, has accordingly increased energy consumption.

Utility model content

The purpose of this utility model first is that by make full use of flue gas waste heat realize desulfurization wastewater zero-emission, solve The operating cost of prior art is high, route complexity problem.

The purpose of this utility model uses the sounding device of high-energy to solve equipment in waste water treatment process second is that passing through Easy fouling, the susceptible to plugging problem of pipeline effectively prevent chemical dosing scale removal bring operating cost height, run discontinuous etc. ask Topic.And the phenomenon that being cooperateed in this technique and use acoustic agglomeration technology and demister, effectively reducing plume, energy conservation is realized comprehensively Environmentally friendly, wastewater zero discharge and reducing discharge of waste gases target.

The technical solution of the utility model is as follows:

A kind of UTILIZATION OF VESIDUAL HEAT IN coordinated desulfurization wastewater zero discharge and the device for removing plume, the pot including passing sequentially through pipeline connection Furnace, air preheater, deduster, desulfurizing tower and chimney, the desulfurization wastewater outlet connection effluent settling chamber of desulfurizing tower, wastewater sedimentation The wastewater outlet in pond connects Waste water concentrating tower by pipeline, and the concentration wastewater outlet of Waste water concentrating tower connects waste water by pipeline and dodges Tower is steamed, the entrance of the flash gas outlet connection deduster of waste water flash column wherein has gas access, gas on Waste water concentrating tower The dedusting gas vent of entrance and deduster connects, and setting high-temperature gas entrance and air preheater outlet connect on waste water flash column It connects.

Further, the UTILIZATION OF VESIDUAL HEAT IN coordinated desulfurization wastewater zero discharge and the device of plume is removed, the Waste water concentrating Tower includes concentration tower ontology, setting desulfurization wastewater entrance and concentration wastewater outlet on concentration tower ontology, concentration tower body interior Ultrasonic wave atomizing nozzle is arranged in top, and ultrasonic wave atomizing nozzle is connected with desulfurization wastewater entrance by pipeline, this side of concentration tower The dedusting gas vent of face setting gas access, concentration tower ontology top setting gas vent, gas access and deduster connects, Gas vent is connect with desulfurizing tower.

Further, the UTILIZATION OF VESIDUAL HEAT IN coordinated desulfurization wastewater zero discharge and the device of plume is removed, the wastewater sedimentation Water supply pump is set on pipeline between pond and Waste water concentrating tower.

Further, the UTILIZATION OF VESIDUAL HEAT IN coordinated desulfurization wastewater zero discharge and the device of plume is removed, the Waste water concentrating Solution pump is set on pipeline between tower and waste water flash column.

Further, the UTILIZATION OF VESIDUAL HEAT IN coordinated desulfurization wastewater zero discharge and the device of plume is removed, the waste water flash distillation Tower includes flash column ontology, is provided with flash distillation waterwater entrance and flash gas outlet, flash column body interior on flash column ontology Sound wave two-phase flow atomizer is arranged in top, and sound wave two-phase flow atomizer connects flash distillation waterwater entrance, flash column by pipeline High-temperature gas entrance is arranged in ontology top, and high-temperature gas entrance is connect with air preheater outlet, the setting of this body side surface of flash column Flash gas outlet.

Further, the UTILIZATION OF VESIDUAL HEAT IN coordinated desulfurization wastewater zero discharge and remove the device of plume, the desulfurizing tower and Acoustic agglomeration device and demister are set gradually along the direction of desulfurizing tower to chimney in connecting pipe between chimney.

Further, the UTILIZATION OF VESIDUAL HEAT IN coordinated desulfurization wastewater zero discharge and the device of plume is removed, effluent settling chamber First sound wave descaler is set on the pipeline between Waste water concentrating tower, on the pipeline between Waste water concentrating tower and waste water flash column Second sound wave descaler is set.

Further, the UTILIZATION OF VESIDUAL HEAT IN coordinated desulfurization wastewater zero discharge and the device of plume is removed, the waste water is heavy Circulating pump is set on the pipeline between shallow lake pond and Waste water concentrating tower, and circulating pump is connect by pipeline with water supply pump.

Further, the UTILIZATION OF VESIDUAL HEAT IN coordinated desulfurization wastewater zero discharge and the device of plume is removed, sound wave two-phase flow Atomizer is high sound intensity gas-liquid two-phase flow atomizer, provides gas source by the air compressor machine of itself connection.Application number can be used Two-phase flow atomizer described in patent for 201710497628.0 improves atomizing effect, promotes flash efficiency.

Further, the UTILIZATION OF VESIDUAL HEAT IN coordinated desulfurization wastewater zero discharge and the device of plume is removed, which is characterized in that First sound wave descaler or the second sound wave descaler include the acoustical generator that control system is connected by signal-transmitting cable, wherein controlling System processed reaches acoustical generator for converting alternating current to audio signal, through signal-transmitting cable, and acoustical generator uses piezoelectric ceramics The energy conversion device of formula structure is passed for the audio signal received to be converted into mechanical oscillation.

The method that devices discussed above realizes desulfurization wastewater zero-emission and removes plume, comprising the following steps:

Step 1, the desulfurization wastewater generated after desulfurizing tower flue gas desulfurization is sent into effluent settling chamber, in effluent settling chamber Complete suspended substance sedimentation process；

Step 2, the waste water supernatant after preliminary sedimentation enter in Waste water concentrating tower and go out by the dedusting flue gas of deduster The flue gas that mouth is sent into carries out heating evaporation concentration；

Step 3, the concentration waste water after the concentration of Waste water concentrating tower, which is sent to waste water flash column intrinsic fog, turns to droplet, takes sky Bypass flue gas after air preheater mixes with the droplet after atomization and completes the evaporation of waste water, the salinity crystal fine grain after evaporation Enter deduster through flash gas outlet together together with the contaminant particles in flue gas stream to be dusted, solid salt therein and ash Divide and is captured and collected by deduster；

Step 4, in the process for carrying out the above desulfurization wastewater zero-emission, the flue-gas temperature after deduster dedusting is dropped It is low, after desulfurizing tower flue-gas temperature further decrease, start sound wave agglomeration device and demister reduce it is aqueous in flue gas Rate further decreases smoke content in flue gas, realizes the purpose of drop plume.

The course of work of UTILIZATION OF VESIDUAL HEAT IN coordinated desulfurization wastewater zero discharge provided by the utility model and the device for removing plume is such as Under:

(1) boiler smoke after denitration successively passes through the main processing equipment such as air preheater, deduster, desulfurizing tower, most Flue gas is discharged by chimney afterwards.

(2) desulfurization wastewater from desulfurizing tower first passes through effluent settling chamber, and desulfurization wastewater is delivered to by water supply pump and is followed Water inlet port at ring pump intake pipeline, as wastewater treatment；Then waste water is passed through into ultrasonic wave atomizing nozzle using circulating pump Short grained droplet is atomized into spray into Waste water concentrating tower, the bypass low-temperature flue gas after taking deduster enter in Waste water concentrating tower with Waste water circulation fluid carries out mass-and heat-transfer, completes the partial concentration to desulfurization wastewater circulation fluid by the humidifying cooling process of flue gas, Flue gas after humidifying cooling flows out to the main flue gas pipeline of desulfurizing tower leading portion from the top of waste liquid concentration tower.

(3) Waste water concentrating liquid is delivered at sound wave two-phase flow nozzle and the compression from air compressor machine generation by solution pump Air in waste water flash column intrinsic fog chemical conversion mist drop, takes the bypass high-temperature flue gas after air preheater to enter waste water flash distillation together Uniformly pass through flash column in tower under the action of air distributor, evaporative crystallization forms water and steams after the heat of droplet absorption flue gas Vapour and solid salt, under flue gas stream effect, the ash content in water vapour, solid salt and flue gas enters deduster with flue gas together In leading portion main flue gas pipeline, the water vapour after final solution flash distillation enters flue gas aftertreatment systems, solid salt by electric precipitation It is captured and is collected by deduster with ash content.

(4) sound wave apparatus for eliminating sludge is installed on main pipeline and nozzle of Waste water concentrating system and waste water flash distillation Tower System etc. Place after running well to waste water treatment system, starts sound wave apparatus for eliminating sludge；It is equipped on the flue gas pipeline of desulfurizing tower outlet Acoustic agglomeration device and demister start sound wave agglomeration device for the small droplet in flue gas and are agglomerated into big drop, then by removing Day with fog carries out gas-liquid separation.Acoustic agglomeration can reach optimal agglomerating effect, demisting using high frequency, low frequency or Frequency Adjustable sound wave Device by gas-liquid separation and completes moisture collection by centrifugal force, and the moisture content for being finally reached chimney emission reduces, and realizes drop plume Purpose.

It is specific as follows the utility model relates to multiple working principles:

Working principle one: waste liquid is atomized into small liquid under ultrasonic wave atomizing nozzle effect in the transmission process of circulating pump Drop increases the drop and smoke contacts area of atomization.During waste heat flue gas and the water drop contact of atomization, waste water temperature is increased And have effluent part evaporation, the concentration of waste water is completed by the decreasing temperature and increasing humidity process of flue gas.Concentrate and compressed air are in sound wave Tens microns of droplet, the flue gas after droplet and air preheater under this state are mixed and are atomized at two-phase flow atomizer After contact, the contact area of droplet and flue gas is greatly and the temperature of flue gas is higher, and droplet is evaporated simultaneously by absorbing the heat of flue gas And the time of flash distillation is short, when waste water is completed to flash, the temperature of flue gas is slightly reduced, and water capacity is increased slightly, the water after evaporation Steam enters flue gas aftertreatment systems with flue gas, and the solid salt that waste water evaporation generates enters deduster quilt under the drive of air-flow It captures and collects, so far complete the process of desulfurization wastewater zero-emission.

Working principle two: sound is a kind of energy, in air and water transmission and can generate vibration, sound pressure level is very high The energy that high strong sound wave generates is stronger.Sound wave apparatus for eliminating sludge is the acoustic pressure active force generated using the strong sound wave of certain frequency, can To generate cavitation effect and shearing effect in waste liquid, so that matter containing dirt or suspended particle are crushed by dispersion in waste liquid, from It is removed on tube wall, it is difficult to accumulate at tube wall, equipment wall surface and nozzle nozzle, then be participated in by the effect of air-flow or liquid flow Fluid flowing, finally matter containing dirt and suspended matter enter deduster under the drive of flue gas stream and are collected.Acoustic agglomeration device It is to make the fine mist mutually can't touch originally generate judder using the energy of sound mutually to collide, and mutually package agglomerates At biggish drop, then it is collected by acting in demister for centrifugal force, this process reduces the moisture content in flue gas, Play the drop plume effect of certain effect.

Compared with prior art, the utility model has the following beneficial effects:

1, the utility model is in the project of the zero-emission of processing high-salt wastewater, has that simple process, universality be strong, technique Securely and reliably, the features such as operating cost is low.

2, heat source of the utility model using fume afterheat as wastewater treatment, the water vapour after waste water evaporation enter with flue gas Desulfurization Tower System reduces the rate of water make-up of desulfurizing tower；Abraum salt after waste water flash distillation is uniformly admixed into flyash, is not generated Independent solid waste to be treated.

3, desulfurization wastewater zero-emission is effectively merged and is innovated with tail gas drop plume technology by the utility model, is greatly reduced The energy consumed in existing drop plume technology by flue gas cool-down, and process flow is compact, whole cost of investment reduces, and embodies The policies of energy-saving and emission-reduction.

4, in existing waste water zero-discharge technology, the technique diversification of Waste water concentrating section, as reverse osmosis membrane concentration, multiple-effect are steamed Hair concentration etc., wherein the pretreating process of reverse osmosis membrane concentration is more complex and producing water ratio is not high, and cost of investment is big；Multiple-effect evaporation is dense The heat source grade requirement of contracting is high, and operating cost is high；And the utility model is dense as waste water using the fume afterheat after deduster The heat source of contracting, waste water and flue gas direct contact heat transfer evaporate, and not only the water inlet quality requirements of waste water are low, but also to the greatest extent Reduce operating cost.Existing waste water solution evaporative crystallization mostly uses crystallizing evaporator direct crystallization or solution flue to flash Technique, the crystal salt that wherein crystallizing evaporator processing Waste water concentrating not only consumes energy greatly, but also generates are that solid waste (or micro- useless) is difficult to Advanced treating；Waste water solution flue flash process easily causes atomized drop wall built-up, evaporation to be not thorough and corrosive pipeline problem.? In the utility model, the salinity crystallization process in waste water is completed in gas bypass flash column, has both provided the sky of waste water flash distillation Between again it is smaller to the flow of main flue gas pipeline, further, since salinity crystal enters electrostatic precipitator and fine coal with flue gas Ash is uniformly captured by electric precipitation together and is collected.

5, sound wave descalling technique is applied in desulfurization wastewater technique of zero discharge by the utility model, and effective solution is existing Fouling blockage problem in technology in Waste water concentrating flash process, that is, ensure that the continuous operation of system reduce again operation at This.Acoustic agglomeration technology is applied in drop plume technique by the utility model, and it is difficult to solve flue gas cool-down water lift in the prior art The problem of, the receipts water efficiency of demister is improved, the operational effect of single unit system is more preferably.

6. UTILIZATION OF VESIDUAL HEAT IN coordinated desulfurization wastewater zero discharge provided by the utility model and the device and method for removing plume, ingenious Ground utilizes fume afterheat of whole device during desulfurization and dedusting, by setting Waste water concentrating tower and waste water flash column, by cigarette Gas waste heat is as the heat source in Waste water concentrating and waste water flash process, by the way that desulfurization wastewater by concentration and flash distillation, will be concentrated The gentle body of solid generated after rear gas and flash distillation is reintroduced back to whole system and is recycled, and realizes desulfurization wastewater zero-emission It puts, while utilizing acoustic agglomeration and sound wave scale removal, reach the good operation of device, and realize drop plume, so that in whole device Various pieces mutually cooperate with, achieved the purpose that desulfurization wastewater zero-emission jointly and removed plume.

Detailed description of the invention

Fig. 1 is UTILIZATION OF VESIDUAL HEAT IN coordinated desulfurization wastewater zero discharge described in the utility model embodiment 1 and the device for removing plume Schematic diagram；

Fig. 2 is UTILIZATION OF VESIDUAL HEAT IN coordinated desulfurization wastewater zero discharge described in the utility model embodiment 2 and the device for removing plume Schematic diagram；

Fig. 3 is the device signal of the first sound wave descaler described in the utility model embodiment 2 and the second sound wave descaler Figure；

Fig. 4 is UTILIZATION OF VESIDUAL HEAT IN coordinated desulfurization wastewater zero discharge described in the utility model embodiment 3 and the device for removing plume Schematic diagram；

In figure 1 above-Fig. 3,1 is boiler, and 2 be air preheater, and 3 be deduster, and 4 be desulfurizing tower, and 5 fill for acoustic agglomeration It sets, 6 be demister, and 7 be chimney, and 8 be effluent settling chamber, and 9 be water supply pump, and 10-1 is the first sound wave apparatus for eliminating sludge, 10-2 the Two sound wave apparatus for eliminating sludge, 1001 be control system, and 1002 be acoustical generator, and 11 be circulating pump, and 12 be ultrasonic wave atomizing nozzle, and 13 are Waste water concentrating tower, 14 be solution pump, and 15 be sound wave two-phase flow atomizer, and 16 be waste water flash column, and 17 be air compressor machine.

Specific embodiment:

Embodiment 1

Based on a kind of UTILIZATION OF VESIDUAL HEAT IN coordinated desulfurization wastewater zero discharge and plume is gone to the utility model with reference to the accompanying drawing Method specific embodiment is described in detail.

As shown in Figure 1, for UTILIZATION OF VESIDUAL HEAT IN coordinated desulfurization wastewater zero discharge provided in this embodiment and the device of plume is gone to show It is intended to, which includes boiler 1, air preheater 2, deduster 3, desulfurizing tower 4 and the chimney 7 for passing sequentially through pipeline connection, is taken off The desulfurization wastewater outlet connection effluent settling chamber 8 of sulphur tower 4, the wastewater outlet of effluent settling chamber 8 connect Waste water concentrating by pipeline The concentration wastewater outlet of tower 13, Waste water concentrating tower 13 connects waste water flash column 16, the flashed vapour of waste water flash column 16 by pipeline The entrance of body outlet connection deduster 3, wherein there is gas access, the dedusting of gas access and deduster 3 on Waste water concentrating tower 13 Exhanst gas outlet connects, and high-temperature gas entrance is arranged on waste water flash column 16, and high-temperature gas entrance and the outlet of air preheater 2 connect It connects.

Arrangement above mode, by by 1 high-temperature flue gas of boiler carry out wastewater zero discharge during fume afterheat application In the concentration and flash distillation of desulfurization wastewater, first desulfurization wastewater is concentrated in concentration tower 13, then by the concentration after concentration Liquid is flashed by waste water flash column 16, and the solia particle of gas and precipitation, the solia particle being finally precipitated are formed after flash distillation Enter in high-temperature flue gas again and is removed through deduster 3.

Water supply pump 9 is set on the pipeline between effluent settling chamber 8 and Waste water concentrating tower 13, and Waste water concentrating tower 13 and waste water dodge It steams and solution pump 14 is set on the pipeline between tower 16；The above Waste water concentrating tower 13 includes concentration tower ontology, is set on concentration tower ontology Desulfurization wastewater entrance and concentration wastewater outlet are set, ultrasonic wave atomizing nozzle 12, ultrasonic wave is arranged in the top of concentration tower body interior Atomizer 12 is connected with desulfurization wastewater entrance by pipeline, and gas access, concentration tower ontology top is arranged in this body side surface of concentration tower End setting gas vent, gas access are connect with the dedusting gas vent of deduster 3, and gas vent is connect with desulfurizing tower 4；Waste water Flash column 16 is including being provided with flash distillation waterwater entrance and flash gas outlet, flash column sheet on flash column ontology, flash column ontology Sound wave two-phase flow atomizer 15 is arranged in body inner upper, and sound wave two-phase flow atomizer 15 connects flash distillation waste water by pipeline and enters Mouthful, high-temperature gas entrance is arranged in flash column ontology top, and high-temperature gas entrance and the outlet of air preheater 2 connect, flash column sheet Flash gas outlet is arranged in body side surface.

Embodiment 2

The present embodiment is further improvement on that basis of example 1, as shown in Fig. 2, between desulfurizing tower 4 and chimney 7 Acoustic agglomeration device 5 and demister 6 are set gradually along the direction of desulfurizing tower 4 to chimney 7 in connecting pipe, is filled using acoustic agglomeration It sets and issues sound wave to the droplet progress acoustic agglomeration in flue gas stream, form big liquid, then removed by demister 6, thus Good drop plume effect is reached.

On pipeline between effluent settling chamber 8 and Waste water concentrating tower 13 be arranged circulating pump 11, circulating pump 11 by pipeline with Water supply pump 9 connects, and the waste water that water supply pump 9 provides is delivered to ultrasonic wave atomizing nozzle 12 and is further concentrated by circulating pump 11. Sound wave two-phase flow atomizer (15) can be sprayed liquid with subtleer atomised form, increased heating surface area, improved and dodge Steam efficiency.First sound wave descaler 10-1, Waste water concentrating tower are set on the pipeline between effluent settling chamber 8 and Waste water concentrating tower 13 Second sound wave descaler 10-2 is set on the pipeline between 13 and waste water flash column 16, and the first sound wave descaler is removed with the second sound wave The structure of dirty device is as shown in figure 3, include the acoustical generator 1002 that control system 1001 is connected by signal-transmitting cable, wherein controlling System 1001 is used to the alternating current of 220V or 380V being converted into audio signal, reaches acoustical generator 1002 through signal-transmitting cable, Acoustical generator 1002 uses the energy conversion device of piezoelectric ceramic type structure, for the audio signal received to be converted into mechanical vibration Dynamic to pass, to form sound wave, the acoustic pressure active force that sound wave generates can make the matter containing dirt or suspension in pipeline waste liquid Composition granule vibration level is big, it is difficult to accumulate at tube wall, equipment wall surface and nozzle nozzle, then pass through air-flow or the work of liquid flow With fluid flowing is participated in, finally matter containing dirt and suspended matter enter deduster under the drive of flue gas stream and are collected.

Embodiment

Embodiment 3

The method for carrying out desulfurization wastewater zero-emission using device provided by the utility model and removing plume, including following step It is rapid:

Step 1, the desulfurization wastewater generated after desulfurizing tower flue gas desulfurization is first delivered in effluent settling chamber, in sedimentation basin Complete suspended substance sedimentation process；

Step 2, the waste water supernatant after preliminary sedimentation enter in Waste water concentrating tower and carry out by ultrasonic wave atomizing nozzle Atomization, solid-liquid mixing droplet after atomization and the low-temperature flue gas mixed heat transfer after deduster and the evaporation for completing effluent part is dense Contracting；

Step 3, it is atomization that the Waste water concentrating liquid of Waste water concentrating tower outlet enters waste water flash column under the action of solution pump For droplet, the bypass flue gas after taking air preheater mixes with the droplet after atomization and completes the evaporation of waste water, after evaporation Salinity crystal fine grain enter deduster through flash gas outlet together together with the contaminant particles in flue gas stream and be dusted, Gu Body salt and ash content are captured and are collected by deduster；

Step 4, flue gas are completed in the process of desulfurization wastewater zero-emission, and flue-gas temperature decreases, after desulfurizing tower Flue-gas temperature further decreases, and starts the moisture content in sound wave agglomeration device and demister reduction flue gas, further decreases flue gas Middle smoke content realizes the purpose of drop plume.

In the concentration and flash process of the above desulfurization wastewater, increase sound wave descalling technique and ultrasonic wave and two-phase flow nozzle Technology combines, and solves line clogging and scale problems in technical process, increases the heat exchange efficiency of flue gas and waste water.

With certain power plant 10m³For the desulfurization wastewater of/h, the desulfurization wastewater that desulfurizing tower generates first passes through effluent settling chamber, sinks It is delivered at pump entry pipeline, is then passed through waste water using circulating pump super by water supply pump after the supernatant preheating in shallow lake pond Sound wave atomizer is atomized to be formed in short grained droplet penetrating Waste water concentrating tower, and the atomizing particle size at ultrasonic wave atomizing nozzle is 200-2000 μm, one-jet waste water spray amount is 0.5-5m³/h.Bypass low-temperature flue gas after taking deduster enters Waste water concentrating Mass-and heat-transfer is carried out in tower with waste water circulation fluid, flue-gas temperature is 90-130 DEG C, passes through the humidifying cooling process completion pair of flue gas The concentration of desulfurization wastewater circulation fluid, waste water can be concentrated into 3-5 times；Flue gas after humidifying cooling is flowed out from the top of waste liquid concentration tower To the main flue gas pipeline of desulfurizing tower leading portion, flue-gas temperature outlet temperature is 80-110 DEG C after Waste water concentrating；The temperature of concentrate is 50-90 DEG C, concentrate is delivered at sound wave two-phase flow atomizer and the compression sky from air compressor machine generation by solution pump For gas together in waste water flash column intrinsic fog chemical conversion mist drop, taking the liquid-gas ratio between spray amount and compressed air is 1:100-1:200, The waste water atomizing particle size of two-phase flow nozzle is 30-200 μm.The bypass flue gas after air preheater is taken to enter in waste water flash column And uniformly pass through flash column under the action of air distributor, the entrance flue gas temperature in waste water flash column is 110-140 DEG C, Evaporative crystallization forms water vapour and solid salt after the heat of droplet absorption flue gas, under flue gas stream effect, water vapour, solid salt And the ash content in flue gas enters in deduster leading portion main flue gas pipeline with flue gas together, completes exhanst gas outlet temperature after Waste water concentrating Degree is 80-110 DEG C, and the water vapour after final solution flash distillation is caught with flue gas aftertreatment systems, solid salt and ash content by deduster It catches and collects；Sound wave apparatus for eliminating sludge is installed on main pipeline and nozzle of Waste water concentrating system and waste water flash distillation Tower System etc., After running well to waste water treatment system, start sound wave apparatus for eliminating sludge, the audible frequency range of sound wave apparatus for eliminating sludge is 10kHz ~ 50kHz, sound pressure level is greater than 180dB in water；Acoustic agglomeration device and demisting are installed on the flue gas pipeline of desulfurizing tower outlet Device starts sound wave agglomeration device for the small droplet in flue gas and is agglomerated into big liquid, then carries out gas-liquid separation by demister.Sound Wave, which is reunited, can reach optimal agglomerating effect, demister using high frequency, low frequency or Frequency Adjustable the sound wave combination of 20Hz-12kHz By gas-liquid separation and moisture collection is completed by centrifugal force, the moisture content in chimney emission gas reduces, pollutant index in flue gas 80% is reduced, being finally reached not only realized zero-emission to desulfurization wastewater, but also realized the purpose for removing plume.

Claims (9)

1. a kind of UTILIZATION OF VESIDUAL HEAT IN coordinated desulfurization wastewater zero discharge and the device for removing plume, the boiler including passing sequentially through pipeline connection (1), air preheater (2), deduster (3), desulfurizing tower (4) and chimney (7), which is characterized in that the desulfurization wastewater of desulfurizing tower (4) The wastewater outlet of outlet connection effluent settling chamber (8), effluent settling chamber (8) connects Waste water concentrating tower (13) by pipeline, waste water The concentration wastewater outlet of concentration tower (13) connects waste water flash column (16) by pipeline, and the flash gas of waste water flash column (16) goes out The entrance of mouth connection deduster (3), wherein has gas access, gas access is removed with deduster (3) on Waste water concentrating tower (13) Dirt gas vent connects, and setting high-temperature gas entrance and air preheater (2) outlet connect on waste water flash column (16)；It is described de- Acoustic agglomeration dress is set gradually along the direction of desulfurizing tower (4) to chimney (7) in connecting pipe between sulphur tower (4) and chimney (7) Set (5) and demister (6).

2. UTILIZATION OF VESIDUAL HEAT IN coordinated desulfurization wastewater zero discharge according to claim 1 and the device for removing plume, which is characterized in that The Waste water concentrating tower (13) includes concentration tower ontology, setting desulfurization wastewater entrance and concentration wastewater outlet on concentration tower ontology, Ultrasonic wave atomizing nozzle (12) are arranged in the top of concentration tower body interior, and ultrasonic wave atomizing nozzle (12) and desulfurization wastewater entrance are logical Piping be connected, this body side surface of concentration tower be arranged gas access, concentration tower ontology top be arranged gas vent, gas access with remove The dedusting gas vent of dirt device (3) connects, and gas vent is connect with desulfurizing tower (4) after evaporation.

3. UTILIZATION OF VESIDUAL HEAT IN coordinated desulfurization wastewater zero discharge according to claim 1 and the device for removing plume, which is characterized in that Water supply pump (9) are set on pipeline between the effluent settling chamber (8) and Waste water concentrating tower (13).

4. UTILIZATION OF VESIDUAL HEAT IN coordinated desulfurization wastewater zero discharge according to claim 1 and the device for removing plume, which is characterized in that Solution pump (14) are set on pipeline between the Waste water concentrating tower (13) and waste water flash column (16).

5. UTILIZATION OF VESIDUAL HEAT IN coordinated desulfurization wastewater zero discharge according to claim 1 and the device for removing plume, which is characterized in that The waste water flash column (16) includes flash column ontology, be provided with flash distillation waterwater entrance on flash column ontology and flash gas goes out Mouthful, sound wave two-phase flow atomizer (15) are set above flash column body interior, sound wave two-phase flow atomizer (15) passes through pipe Road, which connects, flashes waterwater entrance, flash column ontology top setting high-temperature gas entrance, high-temperature gas entrance and air preheater (2) Flash gas outlet is arranged in outlet connection, this body side surface of flash column.

6. UTILIZATION OF VESIDUAL HEAT IN coordinated desulfurization wastewater zero discharge according to claim 2 and the device for removing plume, which is characterized in that First sound wave descaler (10-1), Waste water concentrating tower are set on the pipeline between effluent settling chamber (8) and Waste water concentrating tower (13) (13) the second sound wave descaler (10-2) is set on the pipeline between waste water flash column (16).

7. UTILIZATION OF VESIDUAL HEAT IN coordinated desulfurization wastewater zero discharge according to claim 3 and the device for removing plume, which is characterized in that Circulating pump (11) are set on pipeline between the effluent settling chamber (8) and Waste water concentrating tower (13), circulating pump (11) passes through pipe Road is connect with water supply pump (9).

8. UTILIZATION OF VESIDUAL HEAT IN coordinated desulfurization wastewater zero discharge according to claim 5 and the device for removing plume, which is characterized in that Sound wave two-phase flow atomizer (15) is high sound intensity gas-liquid two-phase flow atomizer, is provided by the air compressor machine (17) of itself connection Gas source.

9. UTILIZATION OF VESIDUAL HEAT IN coordinated desulfurization wastewater zero discharge according to claim 6 and the device for removing plume, which is characterized in that First sound wave descaler (10-1) or the second sound wave descaler (10-2) include that control system (1001) passes through signal-transmitting cable The acoustical generator (1002) of connection, wherein control system (1001) transmits electricity through signal for converting alternating current to audio signal Cable reaches acoustical generator (1002), and acoustical generator (1002) uses the energy conversion device of piezoelectric ceramic type structure, for that will receive Audio signal be converted into mechanical oscillation and pass.