CN109650476A - A kind of desulfurization wastewater zero-emission system and method - Google Patents
A kind of desulfurization wastewater zero-emission system and method Download PDFInfo
- Publication number
- CN109650476A CN109650476A CN201910026497.7A CN201910026497A CN109650476A CN 109650476 A CN109650476 A CN 109650476A CN 201910026497 A CN201910026497 A CN 201910026497A CN 109650476 A CN109650476 A CN 109650476A
- Authority
- CN
- China
- Prior art keywords
- waste water
- flue
- desulfurization wastewater
- flue gas
- compressed air
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
- C02F1/048—Purification of waste water by evaporation
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/18—Nature of the water, waste water, sewage or sludge to be treated from the purification of gaseous effluents
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Heat Treatment Of Water, Waste Water Or Sewage (AREA)
Abstract
本发明提供一种脱硫废水零排系统及方法，由蒸发系统、计量控制系统、雾化系统、除尘系统、脱硫废水预处理系统及废水输送系统组成。蒸发系统由蒸发炉组成；计量控制系统由控制部分组成；雾化系统由压缩空气、高压废水和双流体喷枪组成；除尘系统由旋风除尘器和旁路引风机组成；脱硫废水预处理系统由微滤机组成，脱硫废水输送系统由废水输送泵和输送管道组成。压缩空气和脱硫废水进入双流体喷枪雾化，在蒸发炉中被热烟气蒸发；蒸发后的混合烟气通过旋风除尘器除尘后，流出旁路系统。本发明工艺设计合理；成本较低，不会对原有系统造成太大影响，同时可以有效去除脱硫废水中的无机盐离子和重金属离子，实现了脱硫废水的零排放。
The invention provides a desulfurization wastewater zero discharge system and method, which is composed of an evaporation system, a metering control system, an atomization system, a dust removal system, a desulfurization wastewater pretreatment system and a wastewater conveying system. The evaporation system consists of an evaporation furnace; the metering control system consists of the control part; the atomization system consists of compressed air, high-pressure wastewater and a dual-fluid spray gun; the dust removal system consists of a cyclone dust collector and a bypass induced draft fan; the desulfurization wastewater pretreatment system consists of micro The desulfurization waste water conveying system consists of waste water conveying pump and conveying pipeline. The compressed air and desulfurization waste water enter the two-fluid spray gun for atomization, and are evaporated by the hot flue gas in the evaporation furnace; the evaporated mixed flue gas flows out of the bypass system after being dedusted by the cyclone dust collector. The process design of the invention is reasonable; the cost is low, the original system is not greatly affected, and the inorganic salt ions and heavy metal ions in the desulfurization wastewater can be effectively removed, and zero discharge of the desulfurization wastewater is realized.
Description
Technical field
The present invention relates to waste water evaporation process technology more particularly to the desulfurization wastewater evaporation process systems of coal-burning boiler.
Background technique
With the development of national economy, electricity needs is also increasing, and the environmental protection policy of country and local government is also more next
It is stringenter, active service and it is new on the flue gas of coal-burning boiler project require to carry out desulfurization process, to guarantee flue gas qualified discharge.Mesh
Preceding most common sulfur method is wet desulphurization namely lime stone-gypsum technique, the method investment and operating cost all compared with
Low, technique is also more mature, becomes the prevailing technology of desulfurization in world wide.
Lime stone-gypsum technique Main By product is gypsum and desulfurization wastewater, and wherein desulfurization wastewater is weakly acidic,
Contain a large amount of impurity, such as suspended matter, inorganic ion such as F-、Cl-、SO4 2-Deng heavy metal ion Pb2+、Hg2+Deng most of
For a class of pollutant in integrated wastewater discharge standard, it is therefore desirable to strictly be handled waste water, reach country or local ring
It just can be carried out discharge after guarantor's standard.
Desulfurization wastewater derives from the top effluent of waste-water vortex device, in desulfuration absorbing tower operational process, due to inhaling
Receiving liquid is to be recycled, and wherein salinity and suspended matter can be enriched with, and the reduction of pH will affect the efficiency of desulfuration absorbing tower, mistake
High impurity concentration will affect the quality of by-produced gypsum, therefore desulfurization slurry cannot infinitely be concentrated.In general, when desulfurization is starched
When chloride ion reaches 20000mg/L in liquid, absorption tower desulfurization wastewater starts outlet.Currently, desulfurization wastewater mainly uses at materialization
Logos, still, such processing method, which not only exists, such as to be taken up a large area, cost of investment height, process flow complexity, generates largely
The problems such as chemical sludge, energy consumption are high and not can be removed chloride ion, and chloride ion corrosivity in slant acidity water environment is larger, place
Waste water after reason can not reuse, with the raising of environmental requirement, applying for this method is restricted.
Some power plant use film pretreatment+mechanical vapor crystallization treatment technique at present.But the price of this technique film compared with
Height, requirement of the system to compressor is also higher, and desulfurization wastewater pretreatment is more complex, and investment and operating cost are higher.Also some electricity
The evaporation technology that factory uses includes the technologies such as multiple-effect evaporation crystallization and the evaporation of hot fume flue.But multiple-effect evaporation crystallization treatment
Desulfurization wastewater energy consumption is higher, and the operating cost of generation is also higher；Although pretreatment is simple, investment and operating cost are relatively low
Boiler hot flue gases duct, which evaporates desulfurization wastewater technology, has some superiority, but this desulfurization wastewater using this process sprays
Enter the corrosion and scaling that flue dryer section is easily caused in limited flue and blocking, thus bring safe operation of the boiler risk with
Economic loss limits the popularization and application of flue evaporating waste water.
Summary of the invention:
Technical problem: the purpose of the present invention is being directed to the problem that traditional desulfurization wastewater processing cost is higher, technique is more complex,
A kind of technique of zero discharge system based on flue gas evaporation desulfurization wastewater is proposed for existing method of evaporating, to realize desulfurization
The zero-emission of waste water, this technique draw flue gas to bypass flue, and exhaust gas volumn needed for providing evaporation desulfurization wastewater waste water is kept off with entrance
Plate door and outlet damper door are isolated with flue collector, and evaporation process carries out in vapourizing furnace, when bypass flue works normally or examines
When repairing, the normal operation of flue collector system is had substantially no effect on, does not influence the normal operation of boiler, and solves current flue and steams
There is the etching problem to flue and follow-up equipment in hair technology.This technique not only can handle the desulfurization wastewater of power plant, may be used also
To handle the desulfurization wastewater generated after other desulfurizing industrial fumes.
Technical solution: a kind of desulfurization wastewater zero-discharge treatment system of the invention includes vapo(u)rization system, control system, atomization
System, dust pelletizing system, desulfurization wastewater pretreatment system and waste water transportation system composition；
Vapo(u)rization system and atomization system are the core system of desulfurization wastewater zero-emission, mainly by evaporating column and positioned at evaporating column
Interior double-current spray gun body is constituted, and the effect of system is that the desulfurization wastewater droplet after the atomization of double-current spray gun body is flashed to vapor
And solid granule, the vapor and solid granule after evaporating are with flow of flue gas；Flue is provided with electric gear before evaporating column
Flue gas flow is adjusted in plate door；
The lower part of evaporating column is connected with the cyclone dust collectors as dust pelletizing system, and the upper outlet of cyclone dust collectors is connected with
Air-introduced machine is bypassed, the outlet connection outlet electric guard board door of air-introduced machine is bypassed；The upper side of evaporating column is equipped with double-current spray gun body,
The import of the double fluid spray gun body is connected with the outlet of the waste water pump and compressed air storage tank neutralization pond of waste water transportation system, compression
The import of air storage tank neutralization pond and the outlet of air compressor connect；Microfilter, the waste water of desulfurization wastewater pretreatment system
Holding vessel, waste water pump are linked in sequence.
The evaporator section top of its front of double-current spray gun body insertion evaporating column, the center line of double-current spray gun body and evaporation
The center line of tower is overlapped, and nozzle is straight down.
The air compressor takes compressed air to be stored in compressed air storage tank neutralization pond, leads to double-current spray gun body
Compressed air pipe install pressure maintaining valve, guarantee conveying compressed air pressure stablize, so as to obtain preferable atomizing effect and
Evaporation effect.
The evaporating column lower part outlet installs threeway, and the outlet of vertically downward direction is draining ash discharging hole, operates normally feelings
This outlet valve is closed under condition, this port opening when needing deashing；Another outlet is connect by pipeline with cyclone dust collectors.
The processing method of the desulfurization wastewater zero-emission of processing system of the present invention, processing step are as follows:
Desulfurization wastewater caused by step 1 desulphurization system is pre-processed in Microfilter；
Step 2 desulfurization wastewater is after pretreatment, into storage of waste water tank；
The waste water of step 3 storage of waste water tank enters double-current spray gun body together with compressed air, then in double-current spray gun body
Mixed aerosol is carried out in (), nozzle will be atomized droplet and spray；
Waste water after step 4 atomization sprays into evaporating column by spray gun, adjusts flue gas flow by metering control system
With corresponding wastewater flow, under the action of high-temperature flue gas, waste water is evaporated, and evaporates product with flow of flue gas；
Mixed flue gas after step 5 evaporation enters cyclone dust collectors and carries out preliminary dust removal；
Step 6 flue gas is mixed by returning to flue collector after bypass air-introduced machine with flue collector；
The mixed flue gas of step 7 flue collector enters desulfuration absorbing tower to complete a vaporization cycle.
The metering control system, used control device include controller and for measuring flue gas, compressed air
And the sensor of the temperature of waste water, pressure and flow；The bottom of the inlet flue of evaporating column, evaporating column is arranged in temperature sensor
Portion exit flue, compressed air pipeline on and storage of waste water tank to the pipeline of the waste water between double-current spray gun body on；Pressure
Flue at the outlet at bottom of the inlet flue of evaporating column, evaporating column is arranged in, before bypass air-introduced machine in force snesor
Flue, on the flue after bypass air-introduced machine, on the pipeline of compressed air and storage of waste water tank is to two-fluid
On waste pipe between spray gun；Flue gas flow meter is mounted at the gas approach of evaporating column；Compressed air pipe is provided with stream
Meter, electric switching valve, electric flow control valve；Flow is installed on storage of waste water tank to the waste pipe between evaporating column
Meter, electric switching valve, electric flow control valve.
The work step of the metering control system is as follows:
Signal is reached control system by the fluid flowmeter on step 1) waste pipe, and control system measures flow measurement
Volume flow be scaled mass flow, obtain the wastewater quality for spraying into evaporating column in the unit time by double-current spray gun body；
Signal is reached control system by the flowmeter on step 2) compressed air pipe, and control system measures flow measurement
Volume flow be scaled the mass flow of compressed air, obtain in the unit time through the air matter of spray gun penetrating evaporating column
Amount；
Step 3) determines that the relational expression between waste water evaporation capacity and required high-temperature flue gas amount is as follows:
Q1=Q2+Q3, (1)
Q1=c1m1Δt1, (2)
Q2=Q21+Q22=c2m2Δt2+Q22, (3)
Q3=c3m3Δt3, (4)
m1=(c2m2Δt2+Q22+c3m3Δt3)/c1Δt1, (5)
Δt1=T1-T；Δt2=T-T2；Δt3=T-T3 (6)
And volume flow is got used in engineering, i.e.,
V1=(c2m2Δt2+Q22+c3m3Δt3)/ρ1c1Δt1 (7)
In formula: T is evaporation outlet of still bottom flue temperature, T1For vapourizing furnace entrance high-temperature flue-gas, T2For waste water temperature
Degree, T3For compressed air temperature, c1For the specific heat capacity of high-temperature flue gas, c2For the specific heat capacity of water, c3For the specific heat capacity of compressed air, m1
For the flue gas mass that evaporating waste water in the unit time needs, m2For the quality of waste water in the unit time, m3To be compressed in the unit time
The quality of air, ρ1For the density of high-temperature flue gas, Q1Refer to flue gas absorbed heat；Q2Waste water evaporates absorbed heat；Q3Pressure
The heat that contracting air absorbs, then Q22For the gasification latent heat of water；Pressure is approximately an atmospheric pressure；
By formula (1), (2), (3), (4), (5), (6) and (7) input control system, evaporation one in the unit time can be obtained
High-temperature flue gas volume flow needed for determining waste water；
Step 4) control system is by adjusting the inlet baffle door of bypass flue system and bypassing air-introduced machine, in conjunction with flue
Accurate required exhaust gas volumn can be obtained in volume flowmeter.
The utility model has the advantages that compared with prior art, the present invention having the following advantages that and effect: design rationally, solves desulfurization
The processing problem of waste water solves the etching problem existed in current flue evaporation technique to flue and follow-up equipment.It is entire to steam
Hair treatment process does not have waste water outlet, saves waste water resource, saves space, saves cost, this technique draws flue gas to bypassing cigarette
Road is isolated with inlet baffle door and outlet damper door with flue collector, and evaporation process carries out in vapourizing furnace, when bypass flue is normal
When work or maintenance, flue collector system is had substantially no effect on, does not influence the normal operation of boiler；Bypass blower quantity-adjustable and
The resistance balance problem of flue collector and bypass flue.In addition, this technique not only can handle the desulfurization wastewater of power plant, can also locate
Manage the desulfurization wastewater generated after other desulfurizing industrial fumes.
Detailed description of the invention
Fig. 1 is a kind of Novel practical desulfurization wastewater " zero-emission " process system structure connection diagram of the present invention.
Fig. 2 metering control system block diagram.
Wherein have, entrance electric guard board door 1, evaporating column 2, bypass air-introduced machine 3, exports electric guard board door 4, cyclone dust collectors
5, waste water pump 6, storage of waste water tank 7, Microfilter 8, air compressor 9, compressed air storage tank neutralization pond 10, double-current spray gun body
11。
Specific embodiment
The following further describes the present invention with reference to the drawings
A kind of desulfurization wastewater evaporation process system as shown in Figure 1, including by vapo(u)rization system, metering control system, atomization
System, dust pelletizing system, desulfurization wastewater pretreatment system and waste water transportation system composition.Vapo(u)rization system is by vapourizing furnace and pipeline group
At；Metering control system consists of three parts, compressed air pipe part, waste pipe part and control section composition；Atomization
System is made of pressure-air, high pressure waste water and double-current spray gun body；Dust pelletizing system is made of cyclone dust collectors and bypass air-introduced machine,
Desulfurization wastewater pretreatment system is made of Microfilter, and desulfurization wastewater transportation system is by storage of waste water tank, waste water delivery pump and waste water
Conveyance conduit composition.Desulfurization wastewater first passes around pretreatment, and waste water removes bulky grain and suspended matter by Microfilter；Then will
Waste water is pumped into storage of waste water tank；The compressed air and desulfurization wastewater generated from air compressor is passed through double-current spray gun body together
In, it is injected in vapourizing furnace after being atomized by double-current spray gun body, vapourizing furnace upper outlet is connected with bypass smoke inlet, bypasses
Motorized adjustment baffle door is installed at flue entrance, flue gas flow is adjusted by motorized adjustment baffle door；Vapourizing furnace lower part outlet pipe
Road is connected with the upper entrance of cyclone dust collectors；The outlet of cyclone dust collectors is connected with bypass air-introduced machine；Pacify at outlet conduit
Motor switch baffle door is filled, is then connected with flue collector.It evaporates furnace bottom and is equipped with ash hole, periodically distinguish the ash after drying
It removes.
In order to realize the adjustability for being passed through evaporation inner flue gas of the stove, motorized adjustment baffle door is installed at vapourizing furnace gas approach
With bypass air-introduced machine.
In order to realize the continuous operation of vapo(u)rization system, storage of waste water tank is set.
It for preliminary purification flue gas, prevents from bringing biggish load to subsequent dust pelletizing system, setting cyclone dust collectors are preliminary
Dedusting.
In this example, for the desulfurization wastewater of power plant, gas approach can draw bypass flue, exhaust pass after air preheater
Converge with the flue collector before desulfurization；For smelting the desulfurization wastewater of aluminium manufacturer, gas approach can be drawn from roasting rear pass, for it
His industrial smoke is drawn from temperature and the suitable flue of structure.
Using desulfurization wastewater evaporation process system processing waste water, its step are as follows:
(1) desulfurization wastewater that desulphurization system generates enters Microfilter and is pre-processed；
(2) desulfurization wastewater is after pretreatment, into storage of waste water tank；
(3) waste water of storage of waste water tank enters two-fluid by waste water pump together with the compressed air of compressed air storage tank
Spray gun, then carries out mixed aerosol in spray gun, and nozzle will be atomized droplet and spray；
(4) waste water after being atomized sprays into vapourizing furnace by spray gun, adjusts flue gas flow matching pair by metering control system
The wastewater flow answered, under the action of high-temperature flue gas, waste water is evaporated, and evaporates product with flow of flue gas；
(5) mixed flue gas after evaporating enters cyclone dust collectors and carries out preliminary dust removal；
(6) flue gas is mixed by returning to flue collector after bypass blower with flue collector；
(7) mixed flue gas of flue collector enters desulfuration absorbing tower, to complete a vaporization cycle.
In order to realize the controllability of evaporation process, when being passed through hot fume and starting evaporation, the work step of control system is as follows:
(1) signal is reached control system by the fluid flowmeter on waste pipe, and control system measures flow measurement
Volume flow is scaled mass flow, obtains the wastewater quality for spraying into evaporating column in the unit time by spray gun；
(2) signal is reached control system by the flowmeter on compressed air pipe, and control system measures flow measurement
Volume flow is scaled the mass flow of compressed air, obtains the air quality for spraying into evaporating column in the unit time by spray gun；
(3) determine that the relational expression between waste water evaporation capacity and required high-temperature flue gas amount is as follows:
Q1=Q2+Q3, (1)
Q1=c1m1Δt1, (2)
Q2=Q21+Q22=c2m2Δt2+Q22, (3)
Q3=c3m3Δt3, (4)
m1=(c2m2Δt2+Q22+c3m3Δt3)/c1Δt1, (5)
Δt1=T1-T；Δt2=T-T2；Δt3=T-T3 (6)
And volume flow is got used in engineering, i.e.,
V1=(c2m2Δt2+Q22+c3m3Δt3)/ρ1c1Δt1 (7)
In formula, T is evaporation outlet of still bottom flue temperature, T1For vapourizing furnace entrance high-temperature flue-gas, T2For waste water temperature
Degree, T3For compressed air temperature, c1For the specific heat capacity of high-temperature flue gas, c2For the specific heat capacity of water, c3For the specific heat capacity of compressed air, m1
For the flue gas mass that evaporating waste water in the unit time needs, m2For the quality of waste water in the unit time, m3To be compressed in the unit time
The quality of air, ρ1For the density of high-temperature flue gas, Q1Refer to flue gas absorbed heat；Q2Waste water evaporates absorbed heat；Q3Pressure
The heat that contracting air absorbs, then Q22For the gasification latent heat of water；Pressure is approximately an atmospheric pressure；
By formula (1), (2), (3), (4), (5), (6) and (7) input control system, evaporation one in the unit time can be obtained
High-temperature flue gas volume flow needed for determining waste water；
(4) control system is by adjusting the inlet baffle door of bypass flue system and bypassing air-introduced machine, in conjunction with flue body
More accurate required exhaust gas volumn can be obtained in product flowmeter.
Structure of the invention is relatively simple, easy to operate, evaporates desulfurization wastewater using the original hot fume of factory, cost compared with
It is low；For desulfurization wastewater after cyclone discharge, desulfurization wastewater first passes around pretreatment, waste water by Microfilter, removal bulky grain with
Suspended matter；Then waste water is pumped into storage of waste water tank；Entered in spray gun by waste water transportation system；Into the high pressure in spray gun
Waste water and the compressed air mixed aerosol for entering spray gun；Waste water is injected in vapourizing furnace after passing through double-current spray gun body atomization, is evaporated
Furnace upper outlet is connected with bypass smoke inlet, and motorized adjustment baffle door is installed in bypass flue inlet, passes through motorized adjustment
Baffle door adjusts flue gas flow；Vapourizing furnace lower part outlet pipeline is connected with the upper entrance of cyclone dust collectors；After evaporation
Flue gas can reduce the load of subsequent bag filter by cyclone dust collectors removing unit swarming ash.The outlet of cyclone dust collectors with
Air-introduced machine is bypassed to be connected；Motor switch baffle door is installed at outlet conduit, is then connected with flue collector.Evaporation furnace bottom is equipped with
Ash hole periodically removes the ash content after drying.The relationship between wastewater flow rate and required exhaust gas volumn is matched by control system, is mentioned
The thermal efficiency of high flue gas.
Described above content in this specification is illustrated to examples of the invention.Disclosed by the invention
On the basis of technical solution, those skilled in the art are according to disclosed technology contents, to described
The various modifications or supplement or be substituted in a similar manner that specific embodiment is done, without departing from described in the invention
Content or beyond the scope defined by this claim, belong to the content that the present invention is protected.
Claims (7)
1. a kind of desulfurization wastewater zero-discharge treatment system, which is characterized in that the processing system include vapo(u)rization system, control system,
Atomization system, dust pelletizing system, desulfurization wastewater pretreatment system and waste water transportation system composition；Vapo(u)rization system and atomization system are de-
The core system of sulphur wastewater zero discharge is mainly made of evaporating column (2) and the double-current spray gun body (11) being located in evaporating column (2),
The effect of system is that the desulfurization wastewater droplet after the atomization of double-current spray gun body is flashed to vapor and solid granule, evaporates it
Vapor and solid granule afterwards is with flow of flue gas；Flue is provided with electric guard board door (1) before evaporating column (2), and cigarette is adjusted
Throughput；
The lower part of evaporating column (2) is connected with the cyclone dust collectors (5) as dust pelletizing system, the upper outlet of cyclone dust collectors (5)
It is connected with bypass air-introduced machine (3), bypasses the outlet connection outlet electric guard board door (4) of air-introduced machine (3)；The top of evaporating column (2)
Side is equipped with double-current spray gun body (11), the import of the double fluid spray gun body (11) be connected with waste water transportation system waste water pump (6) and
The outlet of compressed air storage tank neutralization pond (10), import and air compressor (9) of compressed air storage tank neutralization pond (10)
Outlet connection；Microfilter (8), storage of waste water tank (7), the waste water pump (6) of desulfurization wastewater pretreatment system are linked in sequence.
2. a kind of desulfurization wastewater zero-discharge treatment system according to claim 1, which is characterized in that the two-fluid spray
The evaporator section top of evaporating column (2), the center line weight of the center line and evaporating column (2) of double-current spray gun body are inserted into rifle (11) its front
It closes, nozzle is straight down.
3. a kind of desulfurization wastewater zero-discharge treatment system according to claim 1, which is characterized in that the air compressor
(9) compressed-air-storing is produced in compressed air storage tank neutralization pond (10), leads to the compressed air of double-current spray gun body (11)
Pipe installing pressure maintaining valve guarantees that the compressed air pressure of conveying is stablized, to obtain preferable atomizing effect and evaporation effect.
4. a kind of desulfurization wastewater zero-discharge treatment system according to claim 1, which is characterized in that the evaporating column (2)
Lower part outlet installs threeway, and the outlet of vertically downward direction is draining ash discharging hole, this outlet valve is closed under normal operation,
This port opening when needing deashing；Another outlet is connect by pipeline with cyclone dust collectors (5).
5. a kind of processing method of the desulfurization wastewater zero-emission of processing system as described in claim 1, which is characterized in that processing step
It is rapid as follows:
Desulfurization wastewater caused by step 1 desulphurization system is pre-processed in Microfilter (8)；
Step 2 desulfurization wastewater is after pretreatment, into storage of waste water tank (7)；
The waste water of step 3 storage of waste water tank (7) enters double-current spray gun body (11) together with compressed air, then sprays in two-fluid
Mixed aerosol is carried out in rifle (11), nozzle will be atomized droplet and spray；
Waste water after step 4 atomization sprays into evaporating column (2) by spray gun, adjusts flue gas flow matching by metering control system
Corresponding wastewater flow, under the action of high-temperature flue gas, waste water is evaporated, and evaporates product with flow of flue gas；
Mixed flue gas after step 5 evaporation enters cyclone dust collectors (5) and carries out preliminary dust removal；
Step 6 flue gas is mixed by returning to flue collector after bypass air-introduced machine (3) with flue collector；
The mixed flue gas of step 7 flue collector enters desulfuration absorbing tower to complete a vaporization cycle.
6. the processing method of desulfurization wastewater zero-emission according to claim 5, which is characterized in that the measure control system
System, used control device includes controller and temperature, pressure and flow for measuring flue gas, compressed air and waste water
Sensor；Flue, compression sky is arranged at the inlet flue of evaporating column (2), the outlet at bottom of evaporating column (2) in temperature sensor
On the pipeline of gas and on storage of waste water tank to the pipeline of the waste water between double-current spray gun body (11)；Pressure sensor setting is being set
Set the fume pipe before flue, bypass air-introduced machine (3) at the inlet flue of evaporating column (2), the outlet at bottom of evaporating column (2)
On flue after road, bypass air-introduced machine (3), on the pipeline of compressed air and storage of waste water tank is to double-current spray gun body
(11) on the waste pipe between；Flue gas flow meter is mounted at the gas approach of evaporating column (2)；Compressed air pipe is provided with
Flowmeter, electric switching valve, electric flow control valve；It is equipped on storage of waste water tank to the waste pipe between evaporating column (2)
Flowmeter, electric switching valve, electric flow control valve.
7. the processing method of desulfurization wastewater zero-emission according to claim 6, which is characterized in that the measure control system
The work step of system is as follows:
Signal is reached control system, the body that control system measures flow measurement by the fluid flowmeter on step 1) waste pipe
Product flow rate conversion is mass flow, obtains the wastewater quality for spraying into evaporating column in the unit time by double-current spray gun body (11)；
Signal is reached control system, the body that control system measures flow measurement by the flowmeter on step 2) compressed air pipe
Product flow rate conversion is the mass flow of compressed air, obtains the air quality for spraying into evaporating column in the unit time by spray gun；
Step 3) determines that the relational expression between waste water evaporation capacity and required high-temperature flue gas amount is as follows:
Q1=Q2+Q3, (1)
Q1=c1m1Δt1, (2)
Q2=Q21+Q22=c2m2Δt2+Q22, (3)
Q3=c3m3Δt3, (4)
m1=(c2m2Δt2+Q22+c3m3Δt3)/c1Δt1, (5)
Δt1=T1-T；Δt2=T-T2；Δt3=T-T3(6)
And volume flow is got used in engineering, i.e.,
V1=(c2m2Δt2+Q22+c3m3Δt3)/ρ1c1Δt1(7)
In formula: T is evaporation outlet of still bottom flue temperature, T1For vapourizing furnace entrance high-temperature flue-gas, T2For waste water temperature, T3
For compressed air temperature, c1For the specific heat capacity of high-temperature flue gas, c2For the specific heat capacity of water, c3For the specific heat capacity of compressed air, m1For list
The flue gas mass that evaporating waste water needs in the time of position, m2For the quality of waste water in the unit time, m3For compressed air in the unit time
Quality, ρ1For the density of high-temperature flue gas, Q1Refer to flue gas absorbed heat；Q2Waste water evaporates absorbed heat；Q3Compression is empty
The heat of aspiration, then Q22For the gasification latent heat of water；Pressure is approximately an atmospheric pressure；
By formula (1), (2), (3), (4), (5), (6) and (7) input control system, it is certain useless that evaporation in the unit time can be obtained
High-temperature flue gas volume flow needed for water；
Step 4) control system is by adjusting the inlet baffle door of bypass flue system and bypassing air-introduced machine, in conjunction with flue volume
Accurate required exhaust gas volumn can be obtained in flowmeter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910026497.7A CN109650476A (en) | 2019-01-11 | 2019-01-11 | A kind of desulfurization wastewater zero-emission system and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910026497.7A CN109650476A (en) | 2019-01-11 | 2019-01-11 | A kind of desulfurization wastewater zero-emission system and method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109650476A true CN109650476A (en) | 2019-04-19 |
Family
ID=66119704
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910026497.7A Pending CN109650476A (en) | 2019-01-11 | 2019-01-11 | A kind of desulfurization wastewater zero-emission system and method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109650476A (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111018025A (en) * | 2019-12-31 | 2020-04-17 | 浙江大学 | Intelligent Wastewater Zero Discharge Coupled Dechlorination System Using Flue Gas Waste Heat |
| CN111285423A (en) * | 2020-02-28 | 2020-06-16 | 山西华仁通电力科技有限公司 | System and method for treating desulfurization concentrated tail solution |
| CN111517394A (en) * | 2020-04-29 | 2020-08-11 | 广东电网有限责任公司电力科学研究院 | Coal-fired power plant desulfurization wastewater bypass flue evaporation simulation method and related device |
| CN112473357A (en) * | 2020-11-10 | 2021-03-12 | 西安西热水务环保有限公司 | Automatic spraying regulation and control device and method for desulfurization wastewater waste heat drying system |
| CN113104917A (en) * | 2021-04-07 | 2021-07-13 | 武汉天和技术股份有限公司 | Automatic spraying and evaporating system for main flue of desulfurization waste water boiler |
| CN113401955A (en) * | 2021-06-24 | 2021-09-17 | 上海宝棱节能工程技术有限公司 | Wastewater zero discharge system and control method thereof |
| CN113501559A (en) * | 2021-07-29 | 2021-10-15 | 南方电网电力科技股份有限公司 | Method and device for adjusting desulfurization wastewater, electronic equipment and storage medium |
| CN116947144A (en) * | 2023-09-21 | 2023-10-27 | 山东中禹环境工程有限公司 | Flue gas evaporation wastewater treatment system |
| CN117486312A (en) * | 2023-12-05 | 2024-02-02 | 西安西热水务环保有限公司 | A zero-discharge system and method for desulfurization wastewater from coal-fired power plants |
| CN117521963A (en) * | 2023-11-14 | 2024-02-06 | 大唐环境产业集团股份有限公司 | Desulfurization wastewater bypass hot flue gas evaporation coal consumption impact assessment method, device and medium |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3442999B2 (en) * | 1998-06-17 | 2003-09-02 | 中部電力株式会社 | Wastewater evaporative concentrator |
| CN103771553A (en) * | 2014-01-08 | 2014-05-07 | 大连森雅能源环保设备有限公司 | Self-adaptive fuzzy control method for evaporation treatment of wet-method smoke desulphurization waste water |
| CN105879542A (en) * | 2016-03-07 | 2016-08-24 | 上海龙净环保科技工程有限公司 | Power plant desulfurization wastewater bypass treatment system and method and flue gas treatment system and method |
| CN105948364A (en) * | 2016-07-05 | 2016-09-21 | 盛发环保科技（厦门）有限公司 | Desulfurization wastewater zero discharging treatment system based on bypass flue evaporation |
| CN107129094A (en) * | 2017-06-08 | 2017-09-05 | 上海电力学院 | The Zero discharging system of desulfurization wastewater is evaporated based on multi-heat source |
| CN107935292A (en) * | 2017-12-27 | 2018-04-20 | 大唐环境产业集团股份有限公司 | The system and method for smoke discharging residual heat evaporation desulfurization wastewater are utilized under running on the lower load |
| CN108609795A (en) * | 2018-07-02 | 2018-10-02 | 江苏华电扬州发电有限公司 | A kind of processing system and method for desulfurization wastewater |
-
2019
- 2019-01-11 CN CN201910026497.7A patent/CN109650476A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3442999B2 (en) * | 1998-06-17 | 2003-09-02 | 中部電力株式会社 | Wastewater evaporative concentrator |
| CN103771553A (en) * | 2014-01-08 | 2014-05-07 | 大连森雅能源环保设备有限公司 | Self-adaptive fuzzy control method for evaporation treatment of wet-method smoke desulphurization waste water |
| CN105879542A (en) * | 2016-03-07 | 2016-08-24 | 上海龙净环保科技工程有限公司 | Power plant desulfurization wastewater bypass treatment system and method and flue gas treatment system and method |
| CN105948364A (en) * | 2016-07-05 | 2016-09-21 | 盛发环保科技（厦门）有限公司 | Desulfurization wastewater zero discharging treatment system based on bypass flue evaporation |
| CN107129094A (en) * | 2017-06-08 | 2017-09-05 | 上海电力学院 | The Zero discharging system of desulfurization wastewater is evaporated based on multi-heat source |
| CN107935292A (en) * | 2017-12-27 | 2018-04-20 | 大唐环境产业集团股份有限公司 | The system and method for smoke discharging residual heat evaporation desulfurization wastewater are utilized under running on the lower load |
| CN108609795A (en) * | 2018-07-02 | 2018-10-02 | 江苏华电扬州发电有限公司 | A kind of processing system and method for desulfurization wastewater |
Non-Patent Citations (1)
| Title |
|---|
| 佘晓利等: "燃煤电厂湿法烟气脱硫废水零排放技术进展", 《应用化工》 * |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111018025B (en) * | 2019-12-31 | 2024-01-02 | 浙江大学 | Intelligent wastewater zero-emission coupling dechlorination system for flue gas waste heat utilization |
| CN111018025A (en) * | 2019-12-31 | 2020-04-17 | 浙江大学 | Intelligent Wastewater Zero Discharge Coupled Dechlorination System Using Flue Gas Waste Heat |
| CN111285423A (en) * | 2020-02-28 | 2020-06-16 | 山西华仁通电力科技有限公司 | System and method for treating desulfurization concentrated tail solution |
| CN111517394A (en) * | 2020-04-29 | 2020-08-11 | 广东电网有限责任公司电力科学研究院 | Coal-fired power plant desulfurization wastewater bypass flue evaporation simulation method and related device |
| CN112473357A (en) * | 2020-11-10 | 2021-03-12 | 西安西热水务环保有限公司 | Automatic spraying regulation and control device and method for desulfurization wastewater waste heat drying system |
| CN113104917A (en) * | 2021-04-07 | 2021-07-13 | 武汉天和技术股份有限公司 | Automatic spraying and evaporating system for main flue of desulfurization waste water boiler |
| CN113401955A (en) * | 2021-06-24 | 2021-09-17 | 上海宝棱节能工程技术有限公司 | Wastewater zero discharge system and control method thereof |
| CN113501559A (en) * | 2021-07-29 | 2021-10-15 | 南方电网电力科技股份有限公司 | Method and device for adjusting desulfurization wastewater, electronic equipment and storage medium |
| CN113501559B (en) * | 2021-07-29 | 2022-06-10 | 南方电网电力科技股份有限公司 | Method and device for adjusting desulfurization wastewater, electronic equipment and storage medium |
| CN116947144A (en) * | 2023-09-21 | 2023-10-27 | 山东中禹环境工程有限公司 | Flue gas evaporation wastewater treatment system |
| CN116947144B (en) * | 2023-09-21 | 2023-12-08 | 山东中禹环境工程有限公司 | Flue gas evaporation wastewater treatment system |
| CN117521963A (en) * | 2023-11-14 | 2024-02-06 | 大唐环境产业集团股份有限公司 | Desulfurization wastewater bypass hot flue gas evaporation coal consumption impact assessment method, device and medium |
| CN117486312A (en) * | 2023-12-05 | 2024-02-02 | 西安西热水务环保有限公司 | A zero-discharge system and method for desulfurization wastewater from coal-fired power plants |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109650476A (en) | A kind of desulfurization wastewater zero-emission system and method | |
| CN109052526B (en) | High-salt-content wastewater zero discharge system for flue gas white elimination coupling high-temperature bypass flue evaporation | |
| CN107739119A (en) | - kind of cascade utilization power-plant flue gas waste heat realizes the device of desulfurization wastewater zero-emission | |
| CN108006683A (en) | A kind of method and apparatus that desulfurization wastewater zero-emission is realized using full flue gas | |
| CN108609795B (en) | Desulfurization wastewater treatment system and method | |
| CN107954560A (en) | The technique that vapor recompression is concentrated by evaporation joint flue spray technique processing waste water | |
| CN108640188B (en) | Bypass flue gas flow spray drying desulfurization wastewater treatment device and method | |
| CN111792690A (en) | A device and method for realizing zero discharge of desulfurization wastewater by utilizing waste heat of flue gas | |
| CN108295646A (en) | Desulfurization wastewater zero-emission and flue gas take off white joint processing system | |
| CN106587235A (en) | Full-load gradient flue gas waste heat evaporative waste water control system and control method thereof | |
| CN208500646U (en) | A kind of processing system of desulfurization wastewater | |
| CN107089694A (en) | A kind of swirling flow atomizing desulfurization wastewater coalescence dedusting self-adaptive processing device and method | |
| CN105879542A (en) | Power plant desulfurization wastewater bypass treatment system and method and flue gas treatment system and method | |
| CN205011413U (en) | Coal fired power plant flue gas desulfurization effluent disposal system | |
| CN108201781A (en) | Coke oven flue gas comprehensive treatment system based on sodium backbone method and low temperature SCR denitration | |
| CN208500409U (en) | Directly ventilated type flue gas evaporates desulfurization wastewater treatment system | |
| CN205590344U (en) | Processing system of desulfurization waste water | |
| CN206607042U (en) | A kind of full load gradient fume afterheat evaporating waste water control system | |
| CN212924708U (en) | Concentration and reduction system for desulfurization wastewater treatment of coal-fired power plant | |
| CN109133234A (en) | A kind of desulfurization wastewater Zero discharging system | |
| CN206108954U (en) | Take bypass system's desulfurization waste water spray evaporation processing apparatus | |
| CN207079022U (en) | A kind of vaporising device applied to desulfurization wastewater | |
| CN207797091U (en) | A kind of device for realizing desulfurization wastewater zero-emission using full flue gas | |
| CN208269179U (en) | System of the flue gas waste heat recovery for power-plant flue gas ultra-clean discharge and wastewater zero discharge | |
| CN207933087U (en) | A kind of smoke waste heat utilization system and desulfurization wastewater vapo(u)rization system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20190419 |