CN108840507A - A kind of desulfurization wastewater rotational flow dust-removing method - Google Patents
A kind of desulfurization wastewater rotational flow dust-removing method Download PDFInfo
- Publication number
- CN108840507A CN108840507A CN201810936739.1A CN201810936739A CN108840507A CN 108840507 A CN108840507 A CN 108840507A CN 201810936739 A CN201810936739 A CN 201810936739A CN 108840507 A CN108840507 A CN 108840507A
- Authority
- CN
- China
- Prior art keywords
- waste water
- evaporating column
- waste
- desulfurizing tower
- desulfurization wastewater
- 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.)
- Withdrawn
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D45/00—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces
- B01D45/12—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by centrifugal forces
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
-
- 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
-
- 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
- C02F1/38—Treatment of water, waste water, or sewage by centrifugal separation
-
- 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
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
-
- 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
Abstract
The present invention provides a kind of desulfurization wastewater rotational flow dust-removing methods, wherein, through gypsum dehydration system treated waste water after the processing of waste-water vortex device, a part of underflow goes desulfurizing tower to reuse, a part of overflow goes waste water tank to collect, waste water is delivered to rotary sprayer and is atomized, droplet downlink after atomization, it drives in the wrong direction and contacts with the high-temperature flue gas accessed before air preheater, solid particle and flue gas integrally come downwards to rotary evaporation tower lower part in waste water after evaporation, enter front flue of dust collector through rotary evaporation tower exhaust pass, waste water enters desulfurizing tower by deduster in the form of purifying vapor.Waste water treatment stability of the present invention is high, is not influenced by unit load, and, saving water consume and energy consumption low with operating cost are invested, and realizes that waste water increases smoke moisture simultaneously, improves deduster efficiency of dust collection.
Description
Technical field
The invention belongs to desulfurization wastewater control technology fields, concretely relate to a kind of desulfurization wastewater rotational flow dust-removing method.
Background technique
Desulfurization wastewater in acid pH between 4~6, salt content height intake dissolvability solid amount (TDS) 33500~
Between 64000mg/L, suspension content is high, and suspended matter is gypsum particle, and silica and iron/aluminium hydroxide, waste water are hard
Degree is higher between 5116~11545mg/L, and the cation in waste water is mainly the hardness ions such as calcium and magnesium, heavy metal ion type
More, content is much higher than discharge standard, is mainly simultaneously chloride ion containing a large amount of anion, easily causes the corruption of follow-up equipment
Erosion.
It promulgates within 2006《Waste Water From Fire Power Plant Treatment design technical regulation》It clearly proposes：The desulfurization of thermal power plant is useless
Water processing establishment will be separately provided, and pay the utmost attention to treatment for reuse, do not set discharge outlet, it is necessary to realize waste water.
On April 16th, 2015, State Council's publication《Water pollution action plan》(《Ten, water》), it clearly proposes, arrives the year two thousand twenty,
National Water Environmental quality obtains interim improvement, and seriously polluted water body is reduced by a relatively large margin, and dirt is even forbidden in some key areas
Water discharge.
On September 30th, 2016, Chinese Ministry of Environmental Protection's publication is about soliciting《Thermal power plant's pollution prevention technique policy》With《Thermal power plant's pollution
Prevent and treat best practicable techniques guide》Opinion letter, to dirt caused by the exhaust gas of power plant emission, waste water, noise, solid waste etc.
Dye formulates basic technical policy, explicitly points out about waste water：
1. thermal power plant's water prevention and cure of pollution should follow shunting of removing contamination, multi-purpose water, focus on what not decentralized processing combined
Principle encourages thermal power plant to realize the recycling not outlet of waste water；
2. desulfurization wastewater should by neutralizing, precipitating, flocculation, the traditional handicrafts processing such as clarification, encourage to steam method using waste heat dry
The treatment process such as dry, crystallization.
Desulfurization wastewater is used for wet slag removal system through conventional treatment or without processing, since desulfurization wastewater is in acid and chlorine
Ion concentration is high, has an impact to the comprehensive utilization of lime-ash while corrosivity is extremely strong, and in addition washing slag water needs secondary place
Reason, it is difficult to realize real waste water.
Chinese patent CN 204185326U provides a kind of desulfurization wastewater treatment system, including Wastewater Pretreatment equipment, steams
Concentrator and evaporation crystallization equipment are sent out, by the processing of the equipment, final product is distilled water and crystal salt, is reduced harmful
The discharge of substance, but evaporative crystallization technique requires the purity of crystal salt, needs to carry out depth pretreatment to desulfurization wastewater, after
Continuous film concentration and evaporative crystallization operating condition need to remove turbidity, fouling tendency substance, COD (COD), in enriching stage, very
It is easy fouling, influences the operation and service life of equipment, magnesium ion concentration is high in desulfurization wastewater, softens the product hydroxide of generation
Magnesium is cotton-shaped colloid, and hardly possible precipitating is difficult to be separated by filtration, brings difficulty to technological operation, while operating cost is relatively high, evaporation knot
Brilliant part operating cost accounts for about the 45% of overall running cost.System must outlet small part brackish water or sludge, in waste water treatment
Obtained crystalline product salt, it is difficult to which commercial exploitation is needed as fixed-end forces.
Summary of the invention
The present invention provides a kind of desulfurization wastewater rotational flow dust-removing methods of particulate matter in low energy consumption, efficient removal waste water, solve
Defect in the prior art.
To achieve the above object, the invention proposes a kind of desulfurization wastewater rotational flow dust-removing method, include the following steps：
(1) desulfurizing tower gypsum slurries are delivered to waste-water vortex through the first waste water delivery pump after gypsum dehydration system is handled
Device；
(2) for waste water after the processing of waste-water vortex device, the higher cyclone underflow discharge of solid content to desulfurizing tower recycles benefit
With, cyclone overflow is delivered to waste water tank collection, and waste water tank waste water, from waste water tank is flow to, adjusts wastewater pH through high-order lye tank,
Then rotary atomizer atomization is delivered to through the second waste water delivery pump；
(3) the waste water downlink after atomization and the uplink high temperature cigarette before the air preheater come through the conveying of evaporating column gas approach
Gas contact, atomization waste water is evaporated rapidly after contacting with high-temperature flue gas, under the vapor and solid matter formed after being evaporated and flue gas
To evaporating column exhaust pass, waste water reduces flue-gas temperature while being humidified row, is delivered to through evaporating column exhaust pass
Deduster, inorganic salts and heavy metal in waste water are removed in deduster, and waste water passes through dedusting in the form of purifying vapor
Device enters desulfurizing tower；
(4) waste water that desulfurizing tower generates is recycled by above-mentioned steps, realizes desulfurization wastewater.
Preferably, liquid is atomized into about 50 microns of average grain diameter of small droplet through rotary atomizer, small droplet is by being atomized
Nozzle sprays.Waste water after softening adjusting pH is delivered on rotary atomizer by the second waste water delivery pump by waste pipe, liquid
It is atomized into about 50 microns of average grain diameter of small droplet in the effect of high-speed rotating centrifugal force, small droplet is sprayed by atomizer.
Preferably, waste water tank carries out preservative treatment using carbon steel and glass flake, evaporating column ontology includes that evaporating column is straight
Cylinder section and evaporating column cone segments, evaporating column direct tube section use stainless steel, and evaporating column cone segments use carbon steel, while in evaporating column sheet
External wall is kept the temperature using heat preservation rock, and compressed air pipe and lye tank are spliced using 304 stainless steels.
Beneficial effects of the present invention are：
(1) desulfurization wastewater slows down the sour corrosion of follow-up equipment, reducing smoke in acid after lye system adjusts pH
In sulfide content so that the acid dew point of corresponding flue gas can be improved avoid the corrosion of subsequent cleaner and flue；
(2) desulfurization wastewater is after the atomization of high-efficiency rotating atomizer, and mean droplet size is in 50 microns, with high-temperature flue gas
Quick break after contact avoids the low phenomenon for leading to waste water evaporation effect difference of flue-gas temperature under current art underload；
(3) enter deduster after waste water atomization and vaporization, flue-gas temperature reduces, while the inorganic salts in waste water can be reduced suitably
Dust specific resistance, and then deduster efficiency of dust collection is improved, the particulate matter in waste water can be further by deduster efficient removal；
(4) waste water evaporation increases the water capacity of flue gas, can reduce the water consumption of subsequent wet desulphurization system；
(5) simple process, waste water treatment stability is high, is not influenced by unit load, and, saving water low with operating cost is invested
Consumption and energy consumption realize that waste water increases smoke moisture simultaneously, reduce fly ash resistivity, increase the carrying capacity of particulate matter and then improve and remove
Dirt device efficiency of dust collection.
Specific embodiment
In order to make the foregoing objectives, features and advantages of the present invention clearer and more comprehensible, With reference to embodiment
The present invention is described in further detail.
Embodiment 1
A kind of desulfurization wastewater rotational flow dust-removing method, by the desulfurizing tower that is sequentially connected to, gypsum dehydration system, waste-water vortex device,
Waste water tank, rotary spray evaporation tower and deduster, waste-water vortex device include the sub- ontology of eddy flow and overflow pipe, are set on the sub- ontology of eddy flow
Cyclone inlets and underflow opening are equipped with, underflow opening is located at the bottom of the sub- ontology of eddy flow, cyclone inlets and gypsum dehydration system phase
Even, cyclone underflow opening is connected with desulfurizing tower, and overflow pipe is arranged on the sub- ontology of eddy flow, has overflow port, overflow on overflow pipe
Mouth is connected with waste water tank；Rotary spray evaporation tower includes evaporating column ontology, rotary atomizer and flue gas distributor, evaporating column ontology
Compressed air pipe is provided on inner wall, compressed air pipe is connected with service air system；Rotary atomizer and waste water
Case is connected, and flue gas distributor is connected with evaporating column gas approach, and evaporating column gas approach is equipped with gas approach baffle door, entrance
Baffle board door of flue is connected with air preheater gas approach；Evaporating column ontology is connected with evaporating column exhaust pass, evaporating column outlet
Flue is equipped with exhaust pass baffle door, and exhaust pass baffle door is connected with deduster gas approach；Deduster and desulfurizing tower phase
Even.
Desulfurizing tower gypsum slurries are delivered to waste-water vortex device after gypsum dehydration system is handled, through the first waste water delivery pump；
After the processing of waste-water vortex device, the higher cyclone underflow discharge of solid content to desulfurizing tower recycles waste water, and cyclone overflows
Stream is delivered to waste water tank collection, and waste water tank waste water, from waste water tank is flow to, adjusts wastewater pH through high-order lye tank, then useless through second
Water delivery pump is delivered to rotary atomizer atomization；Waste water downlink after atomization and the air through the conveying of evaporating column gas approach are pre-
Uplink high-temperature flue gas contact before hot device, atomization waste water are evaporated rapidly after contacting with high-temperature flue gas, the vapor formed after being evaporated
And solid matter and flue gas come downwards to evaporating column exhaust pass, waste water reduces flue-gas temperature while being humidified, through steaming
Hair tower exhaust pass is delivered to deduster, and the inorganic salts and heavy metal in waste water are removed in deduster, and waste water is with purified water
The form of steam enters desulfurizing tower by deduster；The waste water that desulfurizing tower generates is recycled by above-mentioned steps, realizes that desulfurization is useless
Water.Liquid is atomized into about 50 microns of average grain diameter of small droplet through rotary atomizer, and small droplet is sprayed by atomizer.Second
Waste water delivery pump by softening adjust pH after waste water be delivered on rotary atomizer by waste pipe, liquid it is high-speed rotating from
Mental power function is atomized into about 50 microns of average grain diameter of small droplet, and small droplet is sprayed by atomizer.Waste water tank using carbon steel and
Glass flake carries out preservative treatment, and evaporating column ontology includes evaporating column direct tube section and evaporating column cone segments, and evaporating column direct tube section is adopted
With stainless steel, evaporating column cone segments use carbon steel, while being kept the temperature in evaporating column body outer wall using heat preservation rock, and compression is empty
Feed channel and lye tank are spliced using 304 stainless steels.
The embodiment of the present invention has been described in detail above, specific case used herein to the principle of the present invention and
Embodiment is expounded, and the above description of the embodiment is only used to help understand the method for the present invention and its core ideas；
At the same time, for those skilled in the art can in specific embodiments and applications according to the thought of the present invention
There is change place, to sum up, the contents of this specification are not to be construed as limiting the invention.
Claims (2)
1. a kind of desulfurization wastewater rotational flow dust-removing method, includes the following steps：
(1) desulfurizing tower gypsum slurries are delivered to waste-water vortex device through the first waste water delivery pump after gypsum dehydration system is handled；
(2) waste water underflow discharge to desulfurizing tower after the processing of waste-water vortex device recycles, and cyclone overflow is delivered to waste water
Case is collected, and waste water tank waste water, from waste water tank is flow to, adjusts wastewater pH through high-order lye tank, is then conveyed through the second waste water delivery pump
It is atomized to rotary atomizer；
(3) the waste water downlink after being atomized connects with through the uplink high-temperature flue gas before the next air preheater of evaporating column gas approach conveying
Touching, atomization waste water are evaporated rapidly after contacting with high-temperature flue gas, and vapor and solid matter and the flue gas formed after being evaporated comes downwards to
Evaporating column exhaust pass enters deduster, and waste water increases smoke moisture after being evaporated, and specific resistance reduces, the carrying capacity of particulate matter
Increase, the inorganic salts and heavy metal in waste water are removed in deduster, and waste water passes through deduster in the form of purifying vapor
Into desulfurizing tower；
(4) waste water that desulfurizing tower generates is recycled by above-mentioned steps, realizes desulfurization wastewater.
2. desulfurization wastewater rotational flow dust-removing method according to claim 1, it is characterised in that：Waste water tank uses carbon steel and glass squama
Piece carries out preservative treatment, and evaporating column ontology includes evaporating column direct tube section and evaporating column cone segments, and evaporating column direct tube section is using stainless
Steel, evaporating column cone segments use carbon steel, while being kept the temperature in evaporating column body outer wall using heat preservation rock, compressed air pipe
It is spliced with lye tank using 304 stainless steels.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810936739.1A CN108840507A (en) | 2018-08-16 | 2018-08-16 | A kind of desulfurization wastewater rotational flow dust-removing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810936739.1A CN108840507A (en) | 2018-08-16 | 2018-08-16 | A kind of desulfurization wastewater rotational flow dust-removing method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108840507A true CN108840507A (en) | 2018-11-20 |
Family
ID=64189825
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810936739.1A Withdrawn CN108840507A (en) | 2018-08-16 | 2018-08-16 | A kind of desulfurization wastewater rotational flow dust-removing method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108840507A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109455867A (en) * | 2018-12-28 | 2019-03-12 | 大唐环境产业集团股份有限公司 | A kind of flexibly adjustable thermal power plant's full load high-salinity wastewater zero-emission system and method |
| CN111807543A (en) * | 2020-06-30 | 2020-10-23 | 武汉钢铁有限公司 | Zero-discharge treatment method and system for acid-making wastewater of low-cost sintering activated carbon desulfurization process |
-
2018
- 2018-08-16 CN CN201810936739.1A patent/CN108840507A/en not_active Withdrawn
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109455867A (en) * | 2018-12-28 | 2019-03-12 | 大唐环境产业集团股份有限公司 | A kind of flexibly adjustable thermal power plant's full load high-salinity wastewater zero-emission system and method |
| CN109455867B (en) * | 2018-12-28 | 2023-04-25 | 大唐环境产业集团股份有限公司 | Flexible and adjustable thermal power plant full-load high-salinity wastewater zero-emission system and method |
| CN111807543A (en) * | 2020-06-30 | 2020-10-23 | 武汉钢铁有限公司 | Zero-discharge treatment method and system for acid-making wastewater of low-cost sintering activated carbon desulfurization process |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106630358A (en) | Zero-release coupling humidifying dust-removing synergizing system and method for desulfurization wastewater | |
| CN107473482B (en) | Desulfurization waste water flue spraying evaporation treatment system | |
| CN208008493U (en) | A kind of equipment that flue residue heat is used for Waste Water From Fire Power Plant zero discharge treatment | |
| CN108285188A (en) | A kind of UTILIZATION OF VESIDUAL HEAT IN coordinated desulfurization wastewater zero discharge and the device and method for removing plume | |
| CN108006683A (en) | A kind of method and apparatus that desulfurization wastewater zero-emission is realized using full flue gas | |
| CN107697967A (en) | A kind of Desulphurization for Coal-fired Power Plant wastewater zero discharge system and method | |
| CN107777820B (en) | Process for applying waste heat of exhaust steam of air cooling island to zero discharge treatment of wastewater of thermal power plant | |
| CN209974506U (en) | Wet flue gas desulfurization waste water concentration decrement system | |
| CN107954560A (en) | The technique that vapor recompression is concentrated by evaporation joint flue spray technique processing waste water | |
| CN206069429U (en) | A kind of concentration tower of desulfurization wastewater decrement concentration | |
| CN107176742A (en) | A kind of desulfurization wastewater rotational flow dust-removing method | |
| CN107857321B (en) | Process for zero discharge treatment of wastewater of thermal power plant | |
| CN104129824A (en) | Method for heat-engine plant desulfurization wastewater comprehensive treatment and dust particle emission reduction | |
| CN206486391U (en) | A kind of desulfurization wastewater zero-emission couples damping Improvement of dust removal system | |
| CN111792690A (en) | Device and method for realizing zero discharge of desulfurization wastewater by using flue gas waste heat | |
| WO2017177741A1 (en) | Device and method for treating desulfurization wastewater by means of flue multi-stage evaporation | |
| CN104150552A (en) | Distillation drying tower for treating desulfurized waste water in thermal power plant | |
| CN107140777A (en) | A kind of desulfurization wastewater zero discharge treatment device and its processing method | |
| CN108383313A (en) | A kind of MVR concentration cooperates with treatment process and system with swirling flow atomizing | |
| CN106517628A (en) | Desulfurization-wastewater zero discharging device for coal-fired power plant | |
| CN108840507A (en) | A kind of desulfurization wastewater rotational flow dust-removing method | |
| CN207797091U (en) | A kind of device for realizing desulfurization wastewater zero-emission using full flue gas | |
| CN108557930B (en) | The method comprises the following steps of: waste water from power plants processing device and method | |
| CN208517180U (en) | A kind of MVR concentration and swirling flow atomizing coprocessing system | |
| CN107827306A (en) | A kind of thermal power plant desulfurization wastewater zero-discharge treatment system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20181120 |
|
| WW01 | Invention patent application withdrawn after publication |