CN205347083U - Processing system of desulfurization waste water - Google Patents
Processing system of desulfurization waste water Download PDFInfo
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- CN205347083U CN205347083U CN201521082749.1U CN201521082749U CN205347083U CN 205347083 U CN205347083 U CN 205347083U CN 201521082749 U CN201521082749 U CN 201521082749U CN 205347083 U CN205347083 U CN 205347083U
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Abstract
The utility model relates to a processing system of desulfurization waste water, including the processing unit in advance who connects gradually, filter unit, one -level reverse osmosis unit, secondary reverse osmosis unit and evaporation crystallization unit, one -level reverse osmosis unit includes the water -feeding pump, the safety filter ware, the one -level high -pressure pump, energy recuperation device and one -level reverse osmosis unit, the secondary reverse osmosis unit includes second grade high -pressure pump and secondary reverse osmosis device, filter unit, the water -feeding pump, the safety filter ware, the one -level high -pressure pump, one -level reverse osmosis unit, the energy recuperation device, second grade high -pressure pump and secondary reverse osmosis device connect gradually, the one -level, secondary reverse osmosis device is equipped with the one -level respectively, the water end (W. E. ) is produced to the second grade. Adopt in advance processing unit, filter unit and two stage reverse osmosis unit to obtain infiltration water discharge system, the pressure energy of the concentrated water of one -level retrieves and recycles, obtains a small amount of concentrated water. Not only realize the zero release, reduced the concentrated water yield and the equipment size of evaporation crystallization unit operation moreover greatly, practiced thrift the cost, reduced the energy consumption.
Description
Technical field
This utility model relates to industrial waste water treatment, particularly relates to the process system of desulfurization wastewater.
Background technology
The flue gas that coal-burning power plant produces contains more sulfur dioxide, and directly discharge environmental pollution is very big, it is therefore desirable to flue gas is carried out desulfurization process thus realizing cleaning and producing and environmental conservation.Conventional gypsum wet desulfurization technology has good desulfurized effect, but the waste water of its generation has high salinity, high concentrtion, high COD and containing features such as heavy metals, raising along with environmental requirement, coal-burning power plant would not allow for externally discharging any waste water, and desulfurization wastewater process has to pass through strict process and realizes zero-emission.
At present, conventional desulfurization wastewater processes the technique adopting neutralization, coagulation, clarification.Patent CN201520297840 discloses a kind of desulfurizing waste water processing device, can remove the pollutant such as the float in waste water, heavy metal, obtain high salinity primary water, but it can not realize zero-emission.At present, the method for desulfurization wastewater Zero-discharge treating process many employings evaporative crystallization, by the processing method utilizing crystallizing evaporator after the method clarification of desulfurization wastewater routine, sofening treatment, it is achieved the separation of water and dissolving salt in waste water, thus reaching zero-emission.Patent CN201410852359 discloses the good antiscale property evaporative crystallization of a kind of coal-burning power plant's wet desulphurization waste water and processes technique and system, this process technique can meet environmental requirement, but the water yield of its evaporation process is big, causes that evaporation crystallization equipment is big, cost is high, and economic performance is poor；And complicated component in waste water, evaporation crystallization equipment is difficult in maintenance, easily occurs the problems such as evaporation efficiency is low after continuous service.
Utility model content
Based on this, it is necessary to provide a kind of process system realizing zero-emission and the relatively low desulfurization wastewater of processing cost.
A kind of process system of desulfurization wastewater, including the pretreatment unit being sequentially connected with, filter element, first-stage reverse osmosis unit, two-pass reverse osmosis unit and evaporative crystallization unit, described first-stage reverse osmosis unit includes feed pump, cartridge filter, one-level high-pressure pump, energy recycle device and first-stage reverse osmosis device, described two-pass reverse osmosis unit includes two grades of high-pressure pumps and second level reverse osmosis apparatus, described filter element, described feed pump, described cartridge filter, described one-level high-pressure pump, described first-stage reverse osmosis device, described energy recycle device, described two grades of high-pressure pumps and described second level reverse osmosis apparatus are sequentially connected with, described first-stage reverse osmosis device and described second level reverse osmosis apparatus are respectively equipped with one-level and produce water end (W.E.) and two grades of product water end (W.E.)s.
The process system of above-mentioned desulfurization wastewater, pretreatment unit and filter element is adopted to obtain drainage and make desulfurization wastewater meet the inflow requirement of reverse osmosis, then adopt two steps ro unit that desulfurization wastewater carries out concentrating and separating and obtain one-level infiltration water and two grades of infiltration water, producing water end (W.E.) by one-level and two-stage is permeated water and discharged system respectively with reuse by two grades of product water end (W.E.)s, namely respectively one-level produces water and two grades of product water.It is provided with energy recycle device between two steps ro device simultaneously, the pressure energy of the primary concentration water obtained by first-stage reverse osmosis device reclaims, and for improving the pressure of first-stage reverse osmosis device part water inlet, reduce energy consumption and the cost of the process system of desulfurization wastewater, after first-stage reverse osmosis unit and two-pass reverse osmosis cell processing, obtain a small amount of condensed water and undertaken being evaporated process by evaporative crystallization unit.The process system of above-mentioned desulfurization wastewater, not only achieves zero-emission, and greatly reduces the concentration water yield of evaporative crystallization cell processing, reduces the instrument size of evaporative crystallization unit, has saved cost, reduces energy consumption.
Wherein in an embodiment, described first-stage reverse osmosis unit also includes booster pump, the water outlet of described cartridge filter is divided into two-way, two-way water outlet is connected with described one-level high-pressure pump and described energy recycle device respectively, described cartridge filter, described energy recycle device, described booster pump and described first-stage reverse osmosis device are sequentially connected with, and with described and high-pressure pump is in parallel after described energy recycle device and the series connection of described booster pump.
Wherein in an embodiment, described energy recycle device is provided with high-pressure water inlet end and high pressure water side, and described high-pressure water inlet end connects with described first-stage reverse osmosis device, and described high pressure water side is connected with described second level reverse osmosis apparatus by described two grades of high-pressure pumps；Described energy recycle device is additionally provided with low pressure water inlet end and low pressure delivery end, and described low pressure water inlet end connects with described cartridge filter, and described low pressure delivery end is connected with described first-stage reverse osmosis device by described booster pump.
Wherein in an embodiment, described first-stage reverse osmosis device is sea-water reverse osmose apparatus, and described second level reverse osmosis apparatus is disc tube reverse osmosis (dt-ro) device.
Wherein in an embodiment, described pretreatment unit includes Aeration tank and highly effective reaction depositor, and described Aeration tank, described highly effective reaction depositor and described filter element are sequentially connected with.
Wherein in an embodiment, described pretreatment unit also includes aerator, elevator pump and chemicals dosing plant, described aerator is provided with aeration tube, described aeration tube is located at the bottom of Aeration tank, described elevator pump is located on the pipeline that described Aeration tank is connected with described highly effective reaction depositor, and described chemicals dosing plant is for the medicament delivery of described highly effective reaction depositor.
Wherein in an embodiment, the process system of described desulfurization wastewater also includes sludge treating block, described sludge treating block includes sludge concentration tank and dewaterer, described sludge concentration tank is connected with the bottom of described highly effective reaction depositor, described sludge concentration tank is provided with one-level backwater end and muddy water end, described dewaterer is provided with two grades of backwater ends, described one-level backwater end and described two grades of backwater ends and is all connected with described pretreatment unit, and described muddy water end connects with described dewaterer.
Wherein in an embodiment, described filter element includes the filtered water pump, defecator and the water tank with strainer that are sequentially connected with, described filtered water pump connects described highly effective reaction depositor and described defecator, and described water tank with strainer connects described defecator and described first-stage reverse osmosis unit.
Wherein in an embodiment, described defecator is pipe type filtering device.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of the process system of the desulfurization wastewater of an embodiment；
Fig. 2 is the structure chart of the process system of the desulfurization wastewater shown in Fig. 1；
Fig. 3 is the flow chart of the processing method of the desulfurization wastewater of an embodiment.
Detailed description of the invention
For the ease of understanding this utility model, below with reference to relevant drawings, this utility model is described more fully.Accompanying drawing gives preferred embodiment of the present utility model.But, this utility model can realize in many different forms, however it is not limited to embodiment described herein.On the contrary, the purpose providing these embodiments is to make the understanding to disclosure of the present utility model more thorough comprehensively.
It should be noted that be referred to as " being fixed on " another element when element, it can directly on another element or can also there is element placed in the middle.When an element is considered as " connection " another element, it can be directly to another element or may be simultaneously present centering elements.Term as used herein " vertical ", " level ", "left", "right" and similar statement are for illustrative purposes only.
With reference to Fig. 1, the process system 100 of the desulfurization wastewater of an embodiment, including the pretreatment unit 110 being sequentially connected with, filter element 120, first-stage reverse osmosis unit 130, two-pass reverse osmosis unit 140 and evaporative crystallization unit 150.
With reference to Fig. 2, first-stage reverse osmosis unit 130 includes feed pump 134, cartridge filter 136, one-level high-pressure pump 131, energy recycle device 133 and first-stage reverse osmosis device 135.Two-pass reverse osmosis unit 140 includes two grades of high-pressure pumps 141 and second level reverse osmosis apparatus 143.First-stage reverse osmosis device 135 and second level reverse osmosis apparatus 143 are respectively equipped with one-level and produce water end (W.E.) (figure does not mark) and two grades of product water end (W.E.)s (figure does not mark).Filter element 120, feed pump 134, cartridge filter 136, one-level high-pressure pump 131, first-stage reverse osmosis device 135,133, two grades of high-pressure pumps 141 of energy recycle device and second level reverse osmosis apparatus 143 are sequentially connected with, and are sequentially connected with thus realizing filter element 120, first-stage reverse osmosis unit 130 and two-pass reverse osmosis unit 140.
The process system 100 of above-mentioned desulfurization wastewater, pretreatment unit 110 and filter element 120 is adopted to obtain drainage and make desulfurization wastewater meet the inflow requirement of reverse osmosis, then adopt two steps ro unit that desulfurization wastewater carries out concentrating and separating and obtain one-level infiltration water and two grades of infiltration water, producing water end (W.E.) by one-level and two-stage is permeated water and discharged system respectively with reuse by two grades of product water end (W.E.)s, namely respectively one-level produces water and two grades of product water.It is provided with energy recycle device 133 between two steps ro unit simultaneously, the pressure energy of the primary concentration water obtained by first-stage reverse osmosis device 135 reclaims, and for improving the pressure of first-stage reverse osmosis device 135 part water inlet, reduce further the energy consumption of the process system 100 of desulfurization wastewater and cost, after first-stage reverse osmosis unit 130 and two-pass reverse osmosis unit 140 process, obtain a small amount of condensed water and undertaken being evaporated process by evaporative crystallization unit 150.The process system 100 of above-mentioned desulfurization wastewater, not only achieves zero-emission, and greatly reduces the concentration water yield that evaporative crystallization unit 150 processes, reduce the instrument size of evaporative crystallization unit 150, saved cost, reduce energy consumption.
Wherein in an embodiment, the water outlet of cartridge filter 136 is divided into two-way, and two-way water outlet is connected with one-level high-pressure pump 131 and energy recycle device 133 respectively.First-stage reverse osmosis unit 130 also includes booster pump 132.Cartridge filter 136, energy recycle device 133, booster pump 132 and first-stage reverse osmosis device 135 are sequentially connected with, and energy recycle device 133 and booster pump 132 series connection after in parallel with one-level high-pressure pump 131.Two passes is comprised between such cartridge filter 136 and first-stage reverse osmosis device 135, article one, passage was that drainage makes intake pressure be directly entered first-stage reverse osmosis device 135 after reaching requirement from cartridge filter 136 through one-level high-pressure pump 131, article one, passage was that drainage improves pressure from cartridge filter 136 through energy recycle device 133, intake pressure is made to enter first-stage reverse osmosis device 135 after reaching requirement then through booster pump 132, thus reducing the energy consumption of the process system 100 of desulfurization wastewater further.Before cartridge filter 136 is arranged on first-stage reverse osmosis device 135, the fine particles being used for removing in water is to meet the inflow requirement of first-stage reverse osmosis device 135, thus improving effect and the service life of reverse osmosis.Before feed pump 134 is arranged on cartridge filter 136, stable pressure and the water yield can be provided for cartridge filter 136 and one-level high-pressure pump 131, booster pump 132.
Concrete, energy recycle device 133 is provided with high-pressure water inlet end and high pressure water side, the high-pressure water inlet end of energy recycle device 133 connects with first-stage reverse osmosis device 135, and the high pressure water side of energy recycle device 133 is connected with second level reverse osmosis apparatus 143 by two grades of high-pressure pumps 141.
Concrete, energy recycle device 133 is additionally provided with low pressure water inlet end and low pressure delivery end, the low pressure water inlet end of energy recycle device 133 connects with cartridge filter 136, and the low pressure delivery end of energy recycle device 133 is connected with first-stage reverse osmosis device 135 by booster pump 132.
Concrete, in the present embodiment, first-stage reverse osmosis device 135 is sea-water reverse osmose apparatus, and second level reverse osmosis apparatus 143 is disc tube reverse osmosis (dt-ro) device.So first adopt sea-water reverse osmose apparatus to process and obtain condensed water, owing to disc tube reverse osmosis (dt-ro) device is applicable to the concentrating and separating of higher concentration solution, therefore the condensed water that sea-water reverse osmose apparatus is obtained by disc tube reverse osmosis (dt-ro) device is adopted to carry out concentrating and separating again again, obtain the condensed water that concentration is higher, so greatly reducing the concentration water yield that evaporative crystallization unit 150 processes.
Concrete, evaporative crystallization unit 150 is provided with three grades and produces water end (W.E.).Evaporative crystallization unit 150 realizes the separation of water and dissolving salt in waste water, and crystallization obtains solid salt, and condensation obtains evaporation condensed water.Evaporation condensed water produces water end (W.E.) by three grades and discharges to recycle, and is three grades and produces water.Solid salt migrates out the process system 100 of desulfurization wastewater by transporting.
Wherein in an embodiment, pretreatment unit 110 includes Aeration tank 111 and highly effective reaction depositor 113, and Aeration tank 111, highly effective reaction depositor 113 and filter element 120 are sequentially connected with.Pretreatment unit 110, for reducing the COD (ChemicalOxygenDemand, COD) of desulfurization wastewater, content of beary metal and turbidity, makes waste water reach the inflow requirement of filter element 120.
Concrete, pretreatment unit 110 also includes aerator 112, elevator pump 114 and chemicals dosing plant 116.Aerator 112 is provided with aeration tube, aeration tube is located at the bottom of Aeration tank 111, for stirring Aeration tank 111 so that containing more dissolved oxygen in Aeration tank 111, so that the material of desulfurization wastewater such as sulfite ion is fully oxidized in Aeration tank 111, reducing the COD of desulfurization wastewater.Elevator pump 114 is located on the pipeline that Aeration tank 111 is connected with highly effective reaction depositor 113, so that in the waste water entrance highly effective reaction depositor 113 that Aeration tank 111 processes.Chemicals dosing plant 116, for the medicament delivery of highly effective reaction depositor 113, can add different medicaments according to the concrete composition of waste water and make the impurity such as the heavy metal ion in waste water and float produce precipitate, thus reducing turbidity and the content of beary metal of waste water.
Concrete, aerator 112 is roots blower.
Wherein in an embodiment, filter element 120 includes the filtered water pump 121, defecator 123 and the water tank with strainer 125 that are sequentially connected with, filtered water pump 121 connects highly effective reaction depositor 113 and defecator 123, and water tank with strainer 125 connects defecator 123 and first-stage reverse osmosis unit 130.Waste water after highly effective reaction depositor 113 processes enters defecator 123 under the active force of filtered water pump 121 and is filtered process and obtained drainage, and water tank with strainer 125 is used for storing drainage.
Concrete, in the present embodiment, defecator 123 is pipe type filtering device.
Wherein in an embodiment, the process system 100 of desulfurization wastewater also includes sludge treating block 160, and sludge treating block 160 is connected with pretreatment unit 110.
Concrete, sludge treating block 160 includes sludge concentration tank 161 and dewaterer 163, sludge concentration tank 161 is connected with the bottom of highly effective reaction depositor 113, sludge concentration tank 161 is provided with one-level backwater end and muddy water end, dewaterer 163 is provided with two grades of backwater ends, one-level backwater end and two grades of backwater ends are all connected with pretreatment unit 110, and muddy water end connects with dewaterer 163.The precipitate obtained in highly effective reaction depositor 113 is carried out initial concentration at sludge concentration tank 161, one-level backwater is obtained on the upper strata of sludge concentration tank 161, at sludge concentration tank 161, lower floor obtains muddy water, one-level backwater enters pretreatment unit 110 by one-level backwater end and again processes, muddy water obtains two grades of backwater and solid body refuse after entering dewaterer 163 dehydration, two grades of backwater enter pretreatment unit 110 by two grades of backwater ends and again process, and solid body refuse migrates out the process system 100 of desulfurization wastewater by transporting.
With reference to Fig. 3, this utility model additionally provides the processing method of the desulfurization wastewater of an embodiment, comprises the following steps.
Step S100: desulfurization wastewater is carried out pretreatment；It is filtered the desulfurization wastewater through pretreatment again processing, obtained drainage.
Concrete, desulfurization wastewater is carried out the step of pretreatment particularly as follows: by fully oxidized for the material of desulfurization wastewater such as sulfite ion, reduce the COD of desulfurization wastewater；The impurity such as the heavy metal ion in waste water and float are made to produce precipitate again, thus reducing turbidity and the content of beary metal of waste water.Being appreciated that and can add different medicaments according to the concrete composition of waste water, making the impurity such as the heavy metal ion in waste water and float produce precipitate, thus reducing turbidity and the content of beary metal of waste water.
Concrete, step S100 further comprises the steps of: precipitate pretreatment obtained and carries out initial concentration, obtains one-level backwater and muddy water, one-level backwater carries out pretreatment again, obtaining two grades of backwater and solid body refuse after muddy water dehydration, two grades of backwater carry out pretreatment again, and solid body refuse is by transporting transfer.
Step S200: carry out first-stage reverse osmosis process by crossing drainage, obtains one-level infiltration water and primary concentration water, and one-level infiltration water is discharged.
Concrete, to cross drainage before carrying out reverse-osmosis treated, first pass through feed pump and stable pressure and the water yield are provided, the fine particles in dewatering then through elimination is to meet the inflow requirement of first-stage reverse osmosis.
Wherein in an embodiment, mistake drainage enters aquaporin by two and carries out first-stage reverse osmosis.Wherein, a passage is: first reaching pressure requirements through high-pressure pump carries out first-stage reverse osmosis again to cross drainage；Another passage is: crosses drainage first by energy recycle device supercharging, then through booster pump, carries out first-stage reverse osmosis process after reaching pressure requirements, thus reducing the energy consumption that desulfurization wastewater processes further.
Step S300: primary concentration water carries out pressure energy recovery, then carries out two-pass reverse osmosis process, obtains two grades of infiltration water and secondary concentration water, and two grades of infiltration water are discharged.
Wherein, primary concentration water is carried out pressure energy recovery, for improving the pressure of first-stage reverse osmosis device part water inlet.
Step S400: be evaporated by secondary concentration water, crystallization obtains solid salt.
Secondary concentration water realizes the separation of water and dissolving salt in waste water by evaporative crystallization.Concrete, the water vapor condensation that secondary concentration water evaporates is obtained evaporation condensed water by step S400, thus obtaining evaporation condensed water and solid salt, evaporation condensed water discharges to recycle, and solid salt is by transporting transfer.
The processing method of above-mentioned desulfurization wastewater, adopts pretreatment and filtration treatment to make desulfurization wastewater meet the inflow requirement of reverse osmosis, then adopts two steps ro that desulfurization wastewater is carried out concentrating and separating, two-stage is permeated water and discharges respectively with reuse.Not only achieve zero-emission, and greatly reduce the concentration water yield that evaporative crystallization processes, reduce evaporation crystallization equipment size, saved cost.Simultaneously between two steps ro, the pressure energy of primary concentration water is reclaimed, for improving the pressure of first-stage reverse osmosis part water inlet, reduce energy consumption and cost that desulfurization wastewater processes.
Each technical characteristic of embodiment described above can combine arbitrarily, for making description succinct, the all possible combination of each technical characteristic in above-described embodiment is not all described, but, as long as the combination of these technical characteristics is absent from contradiction, all it is considered to be the scope that this specification is recorded.
Embodiment described above only have expressed several embodiments of the present utility model, and it describes comparatively concrete and detailed, but therefore can not be interpreted as the restriction to utility model patent scope.It should be pointed out that, for the person of ordinary skill of the art, without departing from the concept of the premise utility, it is also possible to make some deformation and improvement, these broadly fall into protection domain of the present utility model.Therefore, the protection domain of this utility model patent should be as the criterion with claims.
Claims (9)
1. the process system of a desulfurization wastewater, it is characterized in that, including the pretreatment unit being sequentially connected with, filter element, first-stage reverse osmosis unit, two-pass reverse osmosis unit and evaporative crystallization unit, described first-stage reverse osmosis unit includes feed pump, cartridge filter, one-level high-pressure pump, energy recycle device and first-stage reverse osmosis device, described two-pass reverse osmosis unit includes two grades of high-pressure pumps and second level reverse osmosis apparatus, described filter element, described feed pump, described cartridge filter, described one-level high-pressure pump, described first-stage reverse osmosis device, described energy recycle device, described two grades of high-pressure pumps and described second level reverse osmosis apparatus are sequentially connected with, described first-stage reverse osmosis device and described second level reverse osmosis apparatus are respectively equipped with one-level and produce water end (W.E.) and two grades of product water end (W.E.)s.
2. the process system of desulfurization wastewater according to claim 1, it is characterized in that, the water outlet of described cartridge filter is divided into two-way, two-way water outlet is connected with described one-level high-pressure pump and described energy recycle device respectively, described first-stage reverse osmosis unit also includes booster pump, described cartridge filter, described energy recycle device, described booster pump and described first-stage reverse osmosis device are sequentially connected with, and described energy recycle device and described booster pump series connection after in parallel with described one-level high-pressure pump.
3. the process system of desulfurization wastewater according to claim 2, it is characterized in that, described energy recycle device is provided with high-pressure water inlet end and high pressure water side, described high-pressure water inlet end connects with described first-stage reverse osmosis device, and described high pressure water side is connected with described second level reverse osmosis apparatus by described two grades of high-pressure pumps；Described energy recycle device is additionally provided with low pressure water inlet end and low pressure delivery end, and described low pressure water inlet end connects with described cartridge filter, and described low pressure delivery end is connected with described first-stage reverse osmosis device by described booster pump.
4. the process system of desulfurization wastewater according to claim 1, it is characterised in that described first-stage reverse osmosis device is sea-water reverse osmose apparatus, described second level reverse osmosis apparatus is disc tube reverse osmosis (dt-ro) device.
5. the process system of desulfurization wastewater according to claim 1, it is characterised in that described pretreatment unit includes Aeration tank and highly effective reaction depositor, and described Aeration tank, described highly effective reaction depositor and described filter element are sequentially connected with.
6. the process system of desulfurization wastewater according to claim 5, it is characterized in that, described pretreatment unit also includes aerator, elevator pump and chemicals dosing plant, described aerator is provided with aeration tube, described aeration tube is located at the bottom of Aeration tank, described elevator pump is located on the pipeline that described Aeration tank is connected with described highly effective reaction depositor, and described chemicals dosing plant is for the medicament delivery of described highly effective reaction depositor.
7. the process system of desulfurization wastewater according to claim 5, it is characterized in that, the process system of described desulfurization wastewater also includes sludge treating block, described sludge treating block includes sludge concentration tank and dewaterer, described sludge concentration tank is connected with the bottom of described highly effective reaction depositor, described sludge concentration tank is provided with one-level backwater end and muddy water end, described dewaterer is provided with two grades of backwater ends, described one-level backwater end and described two grades of backwater ends are all connected with described pretreatment unit, and described muddy water end connects with described dewaterer.
8. the process system of desulfurization wastewater according to claim 5, it is characterized in that, described filter element includes the filtered water pump, defecator and the water tank with strainer that are sequentially connected with, described filtered water pump connects described highly effective reaction depositor and described defecator, and described water tank with strainer connects described defecator and described first-stage reverse osmosis unit.
9. the process system of desulfurization wastewater according to claim 8, it is characterised in that described defecator is pipe type filtering device.
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| CN105502785A (en) * | 2015-12-21 | 2016-04-20 | 中国能源建设集团广东省电力设计研究院有限公司 | Desulfurization wastewater treatment system and method |
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| CN105502785A (en) * | 2015-12-21 | 2016-04-20 | 中国能源建设集团广东省电力设计研究院有限公司 | Desulfurization wastewater treatment system and method |
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