CN206843228U - Accessory substance realizes the desulfurization wastewater Zero discharging system of disposal of resources in factory - Google Patents
Accessory substance realizes the desulfurization wastewater Zero discharging system of disposal of resources in factory Download PDFInfo
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- CN206843228U CN206843228U CN201720402568.5U CN201720402568U CN206843228U CN 206843228 U CN206843228 U CN 206843228U CN 201720402568 U CN201720402568 U CN 201720402568U CN 206843228 U CN206843228 U CN 206843228U
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- desulfurization wastewater
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Abstract
The utility model discloses the desulfurization wastewater Zero discharging system that a kind of accessory substance realizes disposal of resources in factory, including flue gas desulphurization system, desulfurization wastewater zero release pretreatment system and desulfurization wastewater zero-emission advanced treatment system：Flue gas desulphurization system includes desulfurizing tower, gypsum cyclone, vacuum belt dewaterer, waste-water vortex device and reflux tank；Desulfurization wastewater zero release pretreatment system includes former pond, first order reaction case, primary-clarifiers, second order reaction case, Secondary clarifier and the filtered water tank being sequentially connected with；Desulfurization wastewater zero-emission advanced treatment system includes ultrafiltration, pH regulating boxs, nanofiltration, nanofiltration water tank, counter-infiltration, concentrated water case and the strong brine electrolyte sodium hypochlorite device being sequentially connected with.The utility model separates the accessory substance of output in desulfurization wastewater Zero discharging system according to different component, and is combined with the original water treatment system of power plant, makes a silk purse out of a sow's ear, realizes recycling in accessory substance factory.
Description
Technical field
It the utility model is related to a kind of water treatment system, and in particular to a kind of accessory substance realizes the de- of disposal of resources in factory
Sulphur wastewater zero discharge system.
Background technology
Cl containing high concentration in desulfurization wastewater caused by thermal power plant's limestone-gypsum method-、SO4 2-、Na+、Ca2+、Mg2+,
It is typical high salt, high rigidity waste water.At present, domestic and international Desulphurization for Coal-fired Power Plant wastewater zero discharge project uses " softening+depth mostly
Degree processing " process route.Due to itself containing substantial amounts of suspension in desulfurization wastewater, it is substantial amounts of heavy also to be produced in softening process
Starch, preprocessing process will produce a large amount of sludge.This part byproduct compounds is complicated, and value is low, can only be used as at solid waste
Put, about 50 ~ 130 yuan/ton of waste water of sludge treatment cost, cause desulfurization wastewater Zero discharging system operating cost high.
The salt-mixture of output in advanced treatment process, main component are sodium chloride and sodium sulphate, and salt-mixture does not have market can
With consumption, can only also solid waste be used as to fill.Mixing abraum salt amount 25 ~ 50kg/ ton waste water caused by desulfurization wastewater evaporative crystallization, landfill
About 50 ~ 100 yuan/ton of waste water of cost, simultaneously as the dissolubility of inorganic salts is very strong, landfill also has certain risk.
As can be seen here, current desulfurization wastewater technique of zero discharge solve only discharge of wastewater problem, and Zero discharging system produces
A large amount of solid wastes, can only landfill disposal, system operation cost is not only significantly increased, and resource is not utilized rationally, is not had
Real zero-emission is realized, does not meet zero-emission project original intention.
Utility model content
Purpose of utility model：The purpose of this utility model is to solve deficiency of the prior art, there is provided a kind of by-product
Thing realizes the desulfurization wastewater Zero discharging system of disposal of resources in factory, by the accessory substance of output in desulfurization wastewater Zero discharging system,
Separate according to different component, and be combined with the original water treatment system of power plant, make a silk purse out of a sow's ear, realize recycling in accessory substance factory
Utilize.
Technical scheme：A kind of accessory substance described in the utility model realizes the desulfurization wastewater zero-emission of disposal of resources in factory
System, including flue gas desulphurization system, desulfurization wastewater zero release pretreatment system and desulfurization wastewater zero-emission advanced treatment system：
Described flue gas desulphurization system includes desulfurizing tower, gypsum cyclone, vacuum belt dewaterer, waste-water vortex device and returned
Flowing water case, the desulfurizing tower are connected with the gypsum cyclone, and vacuum belt dewaterer, institute are provided with below the gypsum cyclone
State gypsum cyclone and vacuum belt dewaterer is respectively connected with reflux tank, the reflux tank is connected with waste-water vortex device；
The desulfurization wastewater zero release pretreatment system is clarified including former pond, first order reaction case, the one-level being sequentially connected with
Device, second order reaction case, Secondary clarifier and filtered water tank, the former pond input are connected with waste-water vortex device, and the two level is clear
Clear device bottom is connected with sludge dewatering equipment, and the sludge dewatering equipment is also associated with mud box；
The desulfurization wastewater zero-emission advanced treatment system include be sequentially connected with ultrafiltration, pH regulating boxs, nanofiltration, nanofiltration water
Case, counter-infiltration, concentrated water case and strong brine electrolyte sodium hypochlorite device, input and the filtered water tank output end of the ultrafiltration connect
Connect.
Further, a part of waste water pumped back desulfurizing tower in the reflux tank, another part pass through waste-water vortex
Device separation heel row goes out flue gas desulphurization system.
Further, the sludge pumping in the primary-clarifiers is to vacuum belt dewaterer.
Further, the mud cake in the mud box is pumped to desulfurizing tower after being mixed with reverse osmosis produced water.
Further, the blowdown of the ultrafiltration, nanofiltration concentrated water are connected to former pond.
Further, the liquor natrii hypochloritis of the strong brine electrolyte sodium hypochlorite device output is connected to cooling water system
System.
Beneficial effect：The beneficial effects of the utility model are as follows：
（1）By the accessory substance of output in desulfurization wastewater Zero discharging system, separated according to different component, and it is original with power plant
Water treatment system is combined, and is made a silk purse out of a sow's ear, and realizes recycling in accessory substance factory.Wastewater zero discharge by-product can not only be reduced
Thing disposal costs, project operation cost, economic benefit and obvious environment benefit can also be reduced by accessory substance business revenue；
（2）Using secondary softening clarification process, the sludge main component of first order reaction clarification is calcium sulfate and magnesium hydroxide,
It is dehydrated after being mixed with desulfurizing tower bottom sediment in vacuum belt desulfurizing machine, is formed outside gypsum and sold.The sludge of second order reaction clarification
Main component is calcium carbonate, and after being mixed under reverse osmosis produced water stirring condition, desulfurizing tower is pumped to as desulfurizing agent；
（3）Liquor natrii hypochloritis is made by being electrolysed sodium hypochlorite technique processed in reverse osmosis concentrated salt solution, and liquor natrii hypochloritis makees
Cooling water system is added to for disinfection sanitizer, prevents the growth of microorganism and algae in cooling water.
Brief description of the drawings
Fig. 1 is flue gas desulphurization system structural representation of the present utility model；
Fig. 2 is desulfurization wastewater zero release pretreatment system structural representation of the present utility model；
Fig. 3 is desulfurization wastewater zero-emission advanced treatment system structural representation of the present utility model.
Embodiment
A kind of accessory substance as shown in Fig. 1 to Fig. 3 realizes the desulfurization wastewater Zero discharging system of disposal of resources in factory, including
Flue gas desulphurization system, desulfurization wastewater zero release pretreatment system and desulfurization wastewater zero-emission advanced treatment system：
Described flue gas desulphurization system includes desulfurizing tower 1, gypsum cyclone 2, vacuum belt dewaterer 3, waste-water vortex device 4
With reflux tank 5, the desulfurizing tower 1 is connected with the gypsum cyclone 2, and the lower section of gypsum cyclone 2 is provided with vacuum belt
Dewaterer 3, the gypsum cyclone 2 and vacuum belt dewaterer 3 are respectively connected with reflux tank 5, and the reflux tank 5 is connected with
Waste-water vortex device 4；
Former pond 6, first order reaction case 7, the one-level that the desulfurization wastewater zero release pretreatment system includes being sequentially connected with are clear
Clear device 8, second order reaction case 9, Secondary clarifier 10 and filtered water tank 11, the input of former pond 6 are connected with waste-water vortex device 4,
The bottom of Secondary clarifier 10 is connected with sludge dewatering equipment 12, and the sludge dewatering equipment 12 is also associated with mud box 13；
The desulfurization wastewater zero-emission advanced treatment system include be sequentially connected with ultrafiltration 14, pH regulating boxs 15, nanofiltration 16,
Nanofiltration water tank 17, counter-infiltration 18, concentrated water case 19 and strong brine electrolyte sodium hypochlorite device 20, the input of the ultrafiltration 14 with
The output end of filtered water tank 11 connects.
Further, a part of waste water pumped back desulfurizing tower 1 in the reflux tank 5, another part is revolved by waste water
Stream device 4 separates heel row and goes out flue gas desulphurization system.
Further, the sludge pumping in the primary-clarifiers 8 is to vacuum belt dewaterer 3.
Further, the mud cake in the mud box 13 produces after water mixes with counter-infiltration 18 and is pumped to desulfurizing tower 1.
Further, the blowdown of the ultrafiltration 14, the concentrated water of nanofiltration 16 are connected to former pond 6.
Further, the liquor natrii hypochloritis that the strong brine electrolyte sodium hypochlorite device 20 exports is connected to cooling water
System.
A kind of above-mentioned accessory substance realizes the handling process of the desulfurization wastewater Zero discharging system of disposal of resources in factory, including such as
Lower step：
（1）After desulfurizing tower bottom slurry is separated by gypsum cyclone, underflow liquid is dehydrated on vacuum belt dewaterer；
（2）Solid content after dehydration is gypsum, and gypsum enters gypsum storage and deposits, sells outside, vacuum belt dewaterer separation
Waste water out enters reflux tank；
（3）A part of waste water pumped back desulfurizing tower in reflux tank, another part separate heel row by waste-water vortex device
Go out flue gas desulphurization system；
（4）Desulfurization wastewater enters former pond, and Aeration fan is passed through compressed air into former pond, reduces water COD to small
In 70mg/L, then first order reaction case is promoted to through raw water pump；
（5）Feeding lime breast and organic sulfur into first order reaction case, under conditions of stirring, regulation pH value to 11.8 ~
12.5, reaction generation main component is the sediment of calcium sulfate and magnesium hydroxide；
（6）From the overflow of first order reaction case to primary-clarifiers, supernatant overflow to second order reaction case, bottom sediment pumping
To vacuum belt desulfurizing machine, it is dehydrated after being mixed with desulfurizing tower bottom sediment, is formed outside gypsum and sold；
（7）Sodium carbonate is added into second order reaction case, under conditions of stirring, reaction generation pure calcium carbonate is not less than
95% sediment；
（8）From the overflow of third-order reaction case to three-level clarifier, supernatant overflow to filtered water tank, sediment is pumped to sludge and taken off
Water dispenser, after dehydration, mud cake falls into mud box, and the reverse osmosis produced water in subsequent technique is back to mud box, is being stirred with calcium carbonate mud cake
Mixed under the conditions of mixing, be pumped to desulfurizing tower；
（9）Pretreatment production water filters out nanoscale suspension, colloid, particulate, bacterium and virus in waste water after ultra-filtration filters
Deng macromolecular substances, clear water enters pH regulating boxs, adds a certain amount of hydrochloric acid, adjusts pH to 5.5 ~ 6.2, under agitation, makes
Carbonate and bicarbonate radical are converted into carbon dioxide and overflowed in water, are then pumped to nanofiltration film separation system；
（10）For desulfurization wastewater after nanofiltration, the nanofiltration concentrated water rich in sulfate radical returns to former pond, ultimately forms gypsum, nanofiltration
Sulfate radical content in production water is less than 100mg/L, is pumped to counter-infiltration；The surface apertures of NF membrane in nanofiltration are 0.51nm,
Film surface carries certain electric charge, has very high and stable rejection to divalent ion or high valence ion, such as sulfate ion,
And then there is higher transmitance to monovalent ion.
（11）Nanofiltration produces water after reverse osmosis concentration, and the production water of hyposaline is used to calcium carbonate mud cake slurry is made to mud box
Liquid, the concentrated water supply strong brine of high saliferous are electrolysed sodium hypochlorite device processed；
（12）For strong brine in electrolysis sodium hypochlorite device, power on condition issues biochemical reaction：NaCl+H2O→
NaClO+ H2↑, most liquor natrii hypochloritis is made in strong brine electrolysis at last, and liquor natrii hypochloritis is added to as disinfection sanitizer
Power plant cooling water system, prevent the growth of microorganism and algae in cooling water.
The utility model separates the accessory substance of output in desulfurization wastewater Zero discharging system according to different component, and with
The original water treatment system of power plant is combined, and is made a silk purse out of a sow's ear, and realizes recycling in accessory substance factory.Waste water zero can not only be reduced
Accessory substance disposal costs are discharged, project operation cost, economic benefit and environmental benefit can also be reduced by accessory substance business revenue
Significantly.
It is described above, only it is preferred embodiment of the present utility model, not the utility model is made any formal
Limitation, although the utility model is disclosed above with preferred embodiment, but be not limited to the utility model, it is any ripe
Professional and technical personnel is known, is not being departed from the range of technical solutions of the utility model, when in the technology using the disclosure above
Hold the equivalent embodiment made a little change or be modified to equivalent variations, as long as being without departing from technical solutions of the utility model
Hold, any simple modification, equivalent change and modification made according to the technical essence of the utility model to above example, still
Belong in the range of technical solutions of the utility model.
Claims (6)
1. a kind of accessory substance realizes the desulfurization wastewater Zero discharging system of disposal of resources in factory, it is characterised in that：Taken off including flue gas
Sulphur system, desulfurization wastewater zero release pretreatment system and desulfurization wastewater zero-emission advanced treatment system：
Described flue gas desulphurization system includes desulfurizing tower（1）, gypsum cyclone（2）, vacuum belt dewaterer（3）, waste-water vortex
Device（4）And reflux tank（5）, the desulfurizing tower（1）With the gypsum cyclone（2）Connection, the gypsum cyclone（2）Lower section
Provided with vacuum belt dewaterer（3）, the gypsum cyclone（2）And vacuum belt dewaterer（3）It is respectively connected with reflux tank
（5）, the reflux tank（5）It is connected with waste-water vortex device（4）；
The desulfurization wastewater zero release pretreatment system includes the former pond being sequentially connected with（6）, first order reaction case（7）, one-level it is clear
Clear device（8）, second order reaction case（9）, Secondary clarifier（10）And filtered water tank（11）, the former pond（6）Input is connected with useless
Water cyclone（4）, the Secondary clarifier（10）Bottom is connected with sludge dewatering equipment（12）, the sludge dewatering equipment（12）Also connect
It is connected to mud box（13）；
The desulfurization wastewater zero-emission advanced treatment system includes the ultrafiltration being sequentially connected with（14）, pH regulating boxs（15）, nanofiltration
（16）, nanofiltration water tank（17）, counter-infiltration（18）, concentrated water case（19）With strong brine electrolyte sodium hypochlorite device（20）, it is described super
Filter（14）Input and filtered water tank（11）Output end connects.
2. a kind of accessory substance according to claim 1 realizes the desulfurization wastewater Zero discharging system of disposal of resources in factory, its
It is characterised by：The reflux tank（5）In a part of waste water pumped back desulfurizing tower（1）, another part passes through waste-water vortex device
（4）Separation heel row goes out flue gas desulphurization system.
3. a kind of accessory substance according to claim 1 realizes the desulfurization wastewater Zero discharging system of disposal of resources in factory, its
It is characterised by：The primary-clarifiers（8）In sludge pumping to vacuum belt dewaterer（3）.
4. a kind of accessory substance according to claim 1 realizes the desulfurization wastewater Zero discharging system of disposal of resources in factory, its
It is characterised by：The mud box（13）In mud cake and counter-infiltration（18）Desulfurizing tower is pumped to after production water mixing（1）.
5. a kind of accessory substance according to claim 1 realizes the desulfurization wastewater Zero discharging system of disposal of resources in factory, its
It is characterised by：The ultrafiltration（14）Blowdown, nanofiltration（16）Concentrated water is connected to former pond（6）.
6. a kind of accessory substance according to claim 1 realizes the desulfurization wastewater Zero discharging system of disposal of resources in factory, its
It is characterised by：The strong brine electrolyte sodium hypochlorite device（20）The liquor natrii hypochloritis of output is connected to cooling water system.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201720402568.5U CN206843228U (en) | 2017-04-18 | 2017-04-18 | Accessory substance realizes the desulfurization wastewater Zero discharging system of disposal of resources in factory |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201720402568.5U CN206843228U (en) | 2017-04-18 | 2017-04-18 | Accessory substance realizes the desulfurization wastewater Zero discharging system of disposal of resources in factory |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106995246A (en) * | 2017-04-18 | 2017-08-01 | 江苏京源环保股份有限公司 | Accessory substance realizes the desulfurization wastewater Zero discharging system and technique of disposal of resources in factory |
| CN109019966A (en) * | 2018-08-19 | 2018-12-18 | 华电电力科学研究院有限公司 | A kind of processing unit and treatment process of Desulphurization for Coal-fired Power Plant waste water reuse |
| CN111039492A (en) * | 2020-02-20 | 2020-04-21 | 北京朗新明环保科技有限公司 | Low-cost zero-discharge desulfurization wastewater treatment system and method |
| CN111617623A (en) * | 2020-06-05 | 2020-09-04 | 林革 | Coal-fired unit wet desulphurization method and system based on alkali residue blending |
-
2017
- 2017-04-18 CN CN201720402568.5U patent/CN206843228U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106995246A (en) * | 2017-04-18 | 2017-08-01 | 江苏京源环保股份有限公司 | Accessory substance realizes the desulfurization wastewater Zero discharging system and technique of disposal of resources in factory |
| CN109019966A (en) * | 2018-08-19 | 2018-12-18 | 华电电力科学研究院有限公司 | A kind of processing unit and treatment process of Desulphurization for Coal-fired Power Plant waste water reuse |
| CN111039492A (en) * | 2020-02-20 | 2020-04-21 | 北京朗新明环保科技有限公司 | Low-cost zero-discharge desulfurization wastewater treatment system and method |
| CN111617623A (en) * | 2020-06-05 | 2020-09-04 | 林革 | Coal-fired unit wet desulphurization method and system based on alkali residue blending |
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