CN205635216U - Concentrated processing apparatus of desulfurization waste water - Google Patents
Concentrated processing apparatus of desulfurization waste water Download PDFInfo
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- CN205635216U CN205635216U CN201620115714.1U CN201620115714U CN205635216U CN 205635216 U CN205635216 U CN 205635216U CN 201620115714 U CN201620115714 U CN 201620115714U CN 205635216 U CN205635216 U CN 205635216U
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Abstract
The utility model provides a concentrated processing apparatus of desulfurization waste water. Include: one softens except that heavy pond group, with a heat transfer pond of preliminary treatment pond group intercommunication, with a membrane distillation system of heat -exchanger tank intercommunication is including a steam outlet, with a condenser of steam outlet intercommunication, with the water that congeals of condenser exports a production pond who communicates. Can realize the concentration and the retrieval and utilization of desulfurization waste water to operation and treatment cost reduce by a wide margin.
Description
Technical field
This utility model relates to environmental protection technical field, is specifically related to a kind of desulfurization wastewater concentration device.
Background technology
Coal fired power generation occupies critical role in China's energy resource supply.For environment protection, most of power plant of China have employed Limestone-gypsum Wet Flue Gas Desulfurization Process technology in recent years, in order to remove the sulfur dioxide in flue gas.Using aforementioned desulfurization technology can produce substantial amounts of desulfurization wastewater, the wet desulphurization waste component of coal-burning power plant is complicated, containing high concentration suspended matter, oversaturated sulphite, chloride ion, sulfate and various heavy.
At present, desulfurization wastewater mainly uses chemical precipitation method to process, part index number difficulty up to standard, even if after process up to standard, due to sulfate substantial amounts of in waste water and muriatic existence, water outlet salinity is still up to 2%～4%, is difficult to recycling, surface water and soil ecology also can be caused after outer row to destroy, cause secondary pollution.Therefore, exploiting economy efficient desulfurization wastewater concentration technique, it is possible not only to reclaim major part water resource, desulfurization wastewater volume after simultaneously can effectively reducing, reduces subsequent treatment load.
In the reuse of existing desulfurization wastewater and concentration technique, the most common are reverse osmosis concentration method.Owing to reverse osmosis process is very strict to inflow requirement, simultaneously need to high pressure equipment, thus resulting in this process system complicated, operating cost is high.Membrane Materials (MD) technology is a kind of efficient membrane separation technique, it is by controlling wastewater temperature, with hydrophobic microporous membrane as separating medium, with film both sides steam pressure difference as mass transfer force, realize Waste water concentrating and the process of pure water recovery, MD technology has many merits compared with conventional film isolation technics, as salt is retained ultrahigh in efficiency, most nonvolatile matters are had nearly 100% and retains efficiency, and influent quality is required low, operating condition is gentle (need not high pressure equipment), operation maintenance is convenient, fouling membrane is less likely to occur and the evaporation of observable index tradition is low etc..Additionally, Membrane Materials is to salinity change strong adaptability in waste water, as long as solute unsaturation separates out in theory, membrane module can be properly functioning.Have surplus heat utilizable under the conditions of, the energy consumption of Membrane Materials system is more much lower than reverse osmosis, and can obtain the highest cycles of concentration.
A kind of method respectively disclosing desulfurization wastewater zero discharge treatment in Chinese invention patent application " a kind of method that power plant desulfurization wastewater zero discharge processes " (CN 104591466A) and Chinese invention patent application " a kind of method of power plant desulfurization wastewater zero discharge reuse " (CN 104743732A), uses electricity flocculation+membrane distillation technique to process desulfurization wastewater.But the technical scheme in above-mentioned two files has the disadvantage in that in (1) desulfurization wastewater containing a large amount of calcium ions and magnesium ion, and Membrane Materials system needs to carry out waste water heat treated, it is easy to produce fouling and cause fouling membrane, therefore Membrane Materials system could be entered after having to pass through sofening treatment, and electricity flocculence can not remove the calcium and magnesium hardness in waste water, it is impossible to ensure the properly functioning of follow-up membrane distillation technique；(2) using normal temperature and pressure operation, actual power plant desulfurization waste water is after electricity flocculation treatment, and temperature only has about 35 DEG C, uses membrane distillation technique to be difficulty with higher membrane flux, will be greatly increased investment and operating cost；(3) not being defined Membrane Materials Inlet and outlet water relevant criterion, feasibility is the strongest；(4) Mercury in Wastewater is not removed, will result in final crystal salt and contain mercury contaminants, affect crystal salt and dispose.
In order to avoid environmental pollution and recycle-water resource, in view of the shortcoming and defect of existing desulfurization wastewater concentration technology, exploitation Novel desulphurization Waste water concentrating processing means and method become urgent problem.
Utility model content
For the problems referred to above, the purpose of this utility model is to provide a kind of desulfurization wastewater concentration device.It is capable of concentration and the reuse of desulfurization wastewater, and operation and processing cost are greatly reduced.
For reaching above-mentioned purpose, the concrete technical scheme that this utility model is taked is:
A kind of desulfurization wastewater concentration device, including:
One softens except weight pond group；
The heat exchange pond connected except weight pond group with described softening；
The Membrane Materials system connected with described heat exchange pond, including a steam (vapor) outlet；
The condenser connected with described steam (vapor) outlet；
The product pond connected with the solidifying water out of described condenser.
Further, described softening includes except weight pond group: the softening being sequentially communicated is except weight pond, coagulating basin and a depositing reservoir；Connect with described heat exchange pond with described depositing reservoir；Described softening is provided with one first dosing pipe except weight pond；Described coagulating basin is provided with one second dosing pipe；Described softening except weight pond, coagulating basin and depositing reservoir bottom all with a spoil disposal pipeline communication.
Further, described softening removes weight pond and coagulating basin is equipped with liquid mixing device；Described softening is bucket-shaped except the bottom of weight pond, coagulating basin and depositing reservoir.
Further, described depositing reservoir connects with described heat exchange pond and is additionally provided with a filter.
Further, the hot working fluid in described heat exchange pond is selected from power plant's heat smoke and/or a heat drain；The cold working medium of described condenser is selected from the cooling water in a cooling tower and/or air.
Further, described Membrane Materials system is selected from direct contact membrane distillation system, sweep gas membrane disillation system or gap field orientation system.
Further, also include being arranged at one first vacuum pump between heat exchange pond and Membrane Materials system and/or be arranged at one second vacuum pump of end in described product pond.
Desulfurization wastewater concentration method based on aforementioned means, comprises the following steps:
1) desulfurization wastewater enters and softens except weight pond group, makes calcium in desulfurization wastewater, magnesium ion and heavy metal ion form precipitation, and realizes mud-water separation, obtains softening waste water；
2) soften waste water and enter heat exchange pond heat temperature raising；
3) the softening waste water after heating up enters Membrane Materials system, obtains concentrating waste water and steam；
4) described steam enters after condenser condenses and produces pond.
Further, step 1) described in desulfurization wastewater enter and soften except weight pond group, make calcium in desulfurization wastewater, magnesium ion and heavy metal ion form precipitation, and realize mud-water separation and include:
1-1) desulfurization wastewater enters and softens except weight pond, and to softening except adding a combination medicament in weight pond and stirring, making softening remove pH value in weight pond is 9～11.5, makes calcium in desulfurization wastewater, magnesium density be reduced to 10mg/L and below 20mg/L respectively, obtains except weight waste water；
1-2) enter coagulating basin except weight waste water, after adding flocculant and flocculation aid in coagulating basin and stirring, after entrance depositing reservoir precipitates, it is achieved mud-water separation, obtain softening waste water.
Further, step 2) in soften waste water enter heat exchange pond be heated to 35～95 DEG C.
Further, step 3) described in heat up after softening waste water enter Membrane Materials system, the concentration waste water salinity obtained is more than 15%.
By taking technique scheme, waste water only need to be by a Membrane Materials, and effluent quality i.e. can reach discharge and reuse standard.It is possible not only to recycle-water resource, it is achieved discharged wastewater met the national standard, if use zero discharge treatment simultaneously, follow-up zero discharge treatment load can be effectively reduced.Furthermore it is possible to use residual heat of electric power plant is Membrane Materials system heat sources, it is possible not only to effectively reduce system operation cost, flue-gas temperature can be reduced simultaneously, reduce water consumption in desulfuration absorbing tower, and reduce to environmental emission heat.To sum up, this utility model has that flow process is simple, produces that water water quality is good, cycles of concentration is high, is prone to the advantage that combines with other technique.
Accompanying drawing explanation
Fig. 1 is the layout schematic diagram of the device that the Waste water concentrating in this utility model one embodiment processes.
Detailed description of the invention
For making features described above of the present utility model and advantage to become apparent, special embodiment below, and coordinate institute's accompanying drawing to be described in detail below.
In an embodiment as shown in Figure 1, the device that a kind of Waste water concentrating processes is provided, including: soften except weight pond 1, agitating device 2, coagulating basin 3, agitating device 4, depositing reservoir 5, spoil disposal pipeline 6 filter 7, heat exchange pond 8, hot working fluid import 9, heat exchanger 10, hot working fluid outlet 11, water pump 12, Membrane Materials system 13, waste water inlet 14, wastewater outlet 15, steam (vapor) outlet 16, condenser 17, cold working medium import 18, cold sender property outlet 19, produce pond 20, vacuum pump 21.
Specifically, soften except weight pond 1 and coagulating basin 3 are equipped with agitating device, sludge bucket and spoil disposal pipeline, the bottom Ye Shi UNICOM of sludgd deposition in reaction tank, spoil disposal pipeline and depositing reservoir 5 can be avoided.
Filter 9 is more medium filter, it is to avoid in waste water, remaining levitation thing affects subsequent film distillation operation；It is chosen in particular from other suspended substance removal systems such as ultrafiltration or microfiltration.
Membrane Materials system 13 is selected from vacuum membrane distillation system, direct contact membrane distillation system, sweep gas membrane disillation system, gap field orientation system, preferably vacuum membrane distillation system.
When utilizing said apparatus to carry out desulfurization wastewater concentration, desulfurization wastewater initially enters softening except weight pond, open agitating device, in reaction tank, combination medicament A is added by the first chemicals dosing plant, combination medicament A includes basic agent, carbonate and organic sulfur, preferred agents is calcium hydroxide, sodium carbonate and organic sulfur, in control reactor, pH is 9～11.5, make the heavy metals such as calcium in waste water, magnesium and lead, zinc, chromium and hydrargyrum form precipitation, make calcium in waste water, magnesium density be reduced to 10mg/L and below 20mg/L respectively.Then waste water enters coagulating basin, and after adding flocculant and flocculation aid and stirring, waste water enters depositing reservoir and carries out mud-water separation.
After precipitation, depositing reservoir supernatant enters filter and removes float in waste water further, makes float in waste water remove weight pond processed by the identical further thickening of spoil disposal pipeline with the mud that coagulating basin produces less than 15mg/L, depositing reservoir, softening.
After waste water is filtered, waste water enters heat exchange pond, and in heat exchange pond, waste water is heated up after 35～95 DEG C by heat exchanger；Waste water heat source preferentially use fume afterheat or discharging of boiler etc.；Can also be heated by electrical heating or steam.
Waste water after heating enters vacuum membrane distillation concentrating and treating system under the effect of vacuum pump.By Membrane Materials system by Waste water concentrating to salinity more than 15%, waste water after concentrated processes (such as evaporative crystallization process) further, under the effect of vacuum pump, after the steam produced is discharged by steam (vapor) outlet, after condenser condenses, form distilled water and enter product pond, be back to the power plant water such as boiler feedwater, medicament preparation water as recycle-water；
Water vapor condensation can use membrane module outside and membrane module internal condensation；Condensation working medium is entered by cold working medium import, is flowed out by cold sender property outlet after heat exchange；Cold Temperature of Working is less than 30 DEG C；Condensation working medium can select the cooling water of cooling tower, air etc..
As a example by a Practical Project, take certain power plant desulfurization waste water, desulfurization wastewater initially enters softening except weight pond, open agitating device, in reaction tank, certain density calcium hydroxide suspension, sodium carbonate liquor and organic sulfur solution is added by medicament addition device, in control reactor, pH is 9～11.5, makes the heavy metals such as calcium in waste water, magnesium and lead, zinc, chromium and hydrargyrum form precipitation.Then waste water enters coagulating basin, and after adding flocculant and flocculation aid and stirring, waste water enters depositing reservoir and carries out mud-water separation.
After precipitation, depositing reservoir supernatant enters filter and removes float in waste water further, makes float in waste water remove weight pond processed by the identical further thickening of spoil disposal pipeline with the mud that coagulating basin produces less than 15mg/L, depositing reservoir, softening.
After waste water is filtered, waste water enters heat exchange pond, and after the flue gas after using dedusting in heat exchange pond is heated to 35～95 DEG C to waste water, the waste water after heating enters vacuum membrane distillation concentrating and treating system under the effect of pump.By Membrane Materials system by Waste water concentrating to salinity more than 15%, waste water after concentrated processes further, under the effect of vacuum pump, after the steam produced is discharged by steam (vapor) outlet, condense through condenser, using the cooling water in circulating cooling tower as cold working medium in cool condenser, water vapor condensation forms distilled water and enters product pond, is back to the power plant water such as boiler feedwater, medicament preparation water as recycle-water.
Carrying out desulfurization wastewater concentration by said apparatus and method, ton water processing cost is about 15 yuan.To same desulfurization wastewater, as used existing reverse osmosis concentration method to carry out processing and carrying out corresponding sofening treatment, its ton of water processing cost is about 22 yuan；Visible, use the device and method of the application that desulfurization wastewater concentration cost can be greatly reduced.
It should be noted that; the above; for preferable case study on implementation of the present utility model; not this utility model is imposed any restrictions; every any simple modification, change and equivalent structure change made above example according to this utility model technical spirit, all still falls within the protection domain of technical solutions of the utility model.
Claims (6)
1. a desulfurization wastewater concentration device, it is characterised in that including:
One softens except weight pond group；
The heat exchange pond connected except weight pond group with described softening；
The Membrane Materials system connected with described heat exchange pond, including a steam (vapor) outlet；
The condenser connected with described steam (vapor) outlet；
The product pond connected with the solidifying water out of described condenser.
2. desulfurization wastewater concentration device as claimed in claim 1, it is characterised in that described softening includes except weight pond group: the softening being sequentially communicated is except weight pond, coagulating basin and a depositing reservoir；Connect with described heat exchange pond with described depositing reservoir；Described softening is provided with one first dosing pipe except weight pond；Described coagulating basin is provided with one second dosing pipe；Described softening except weight pond, coagulating basin and depositing reservoir bottom all with a spoil disposal pipeline communication.
3. desulfurization wastewater concentration device as claimed in claim 2, it is characterised in that described softening is equipped with liquid mixing device except weight pond and coagulating basin；Described softening is bucket-shaped except the bottom of weight pond, coagulating basin and depositing reservoir.
4. desulfurization wastewater concentration device as claimed in claim 2, it is characterised in that described depositing reservoir connects with described heat exchange pond and is additionally provided with a filter.
5. desulfurization wastewater concentration device as claimed in claim 1, it is characterised in that the hot working fluid in described heat exchange pond is selected from power plant's heat smoke and/or a heat drain；The cold working medium of described condenser is selected from the cooling water in a cooling tower and/or air.
6. desulfurization wastewater concentration device as claimed in claim 1, it is characterised in that also include being arranged at one first vacuum pump between heat exchange pond and Membrane Materials system and/or be arranged at one second vacuum pump of end in described product pond.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201620115714.1U CN205635216U (en) | 2016-02-05 | 2016-02-05 | Concentrated processing apparatus of desulfurization waste water |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105585197A (en) * | 2016-02-05 | 2016-05-18 | 大唐环境产业集团股份有限公司 | Desulfurization wastewater concentration treatment device and method |
| CN108341542A (en) * | 2018-02-28 | 2018-07-31 | 河海大学 | A kind of sewage disposal system of separated type magnetic-coagulation-film distillation technology combination |
| CN109133465A (en) * | 2017-06-28 | 2019-01-04 | 北京朗新明环保科技有限公司 | A kind of Waste Heat Reuse vacuum membrane distillation zero discharge treatment device and method |
-
2016
- 2016-02-05 CN CN201620115714.1U patent/CN205635216U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105585197A (en) * | 2016-02-05 | 2016-05-18 | 大唐环境产业集团股份有限公司 | Desulfurization wastewater concentration treatment device and method |
| CN109133465A (en) * | 2017-06-28 | 2019-01-04 | 北京朗新明环保科技有限公司 | A kind of Waste Heat Reuse vacuum membrane distillation zero discharge treatment device and method |
| CN108341542A (en) * | 2018-02-28 | 2018-07-31 | 河海大学 | A kind of sewage disposal system of separated type magnetic-coagulation-film distillation technology combination |
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