CN105254100B - A kind of saline sewage processing system and method - Google Patents
A kind of saline sewage processing system and method Download PDFInfo
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- CN105254100B CN105254100B CN201510696627.XA CN201510696627A CN105254100B CN 105254100 B CN105254100 B CN 105254100B CN 201510696627 A CN201510696627 A CN 201510696627A CN 105254100 B CN105254100 B CN 105254100B
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- 238000012545 processing Methods 0.000 title claims abstract description 62
- 239000010865 sewage Substances 0.000 title claims abstract description 33
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 title claims abstract description 17
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- 238000011084 recovery Methods 0.000 claims abstract description 14
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- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 claims abstract description 13
- 238000000746 purification Methods 0.000 claims abstract description 6
- 238000011282 treatment Methods 0.000 claims description 9
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 8
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- 235000012333 Vitis X labruscana Nutrition 0.000 claims 1
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Abstract
The invention discloses a kind of saline sewage processing system, which includes pretreatment unit, pre-concentration unit, evaporation element, crystalline element, condensate liquid precision processing unit and the solid constituent processing recovery unit of connection；Pending saline sewage is accessed during pretreatment, sewage and sludge are generated after processing；Pre-concentration process generates water purification and concentrated water；Evaporation process generates condensate liquid and strong brine；Crystallization process generates condensate liquid and crystal salt, and water purification and condensate liquid carry out condensate liquid precision processing process, and sludge and crystal salt carry out solid constituent processing removal process；Condensate liquid precision processing process generates recycle-water；This system can completely eliminate the sewage discharge to neighbouring water body, can recycle moisture to the full extent and obtain high-purity softened water according to different demand being customized process choices, and low energy consumption, and can realize that the resource utilization of salinity utilizes.
Description
Technical field
The present invention relates to sewage treatment fields, and in particular, to it is dirty that one kind is used in oil refining saline sewage, petrochemical industry saliferous
The zero of water, coal chemical industry saline sewage, means of flue gas desulfurization of power plant sewage, recirculating water blowdown water, mining sewage and oil gas recovered water etc.
Discharge treating system and method belong to Industrial Waste Water Treatments field.
Background technology
Currently, some ground unit shortage of water resources of China, that quality of water environment is poor, Ecology is damaged the problems such as weighing is very prominent
Go out, be unfavorable for economic society sustainable development.According to statistics, industrial water withdrawal in 2013 accounts for about the 25% of national total water withdrawal, wherein
The high water usages such as thermoelectricity, steel, weaving, papermaking, petrochemical industry and chemical industry high pollution discharge industry water withdrawal accounts for the 50% of industrial water withdrawal
Left and right.Further to strengthen energy-saving and emission-reduction, what State Council had promulgated in December, 2011《National environmental protection " 12th Five-Year Plan " is advised
It draws》Enterprise is clearly encouraged to implement stain disease " zero-emission " measure in the highly water intensive industry such as electric power, petroleum and petrochemical industry, coal chemical industry.2015
The newest promulgation of State Council in April in year《Water prevention and cure of pollution action plan》(" ten, water "), it is desirable that do a good job of it Industrial Water Saving, encourage steel
The highly water intensive enterprise wastewater advanced treatment and reclamation such as iron, textile printing and dyeing, papermaking, petroleum and petrochemical industry, chemical industry, process hides；Accelerate technological achievement
It promotes and applies, emphasis promotes water-saving, water pollution control and the applicable technologies such as recycles；The industrial high slat-containing wastewater of research and development is captured to take off
The foresight technologies such as salt.
The water quality characteristic of the industry saline sewage such as oil refining, petrochemical industry, coal chemical industry, flue gas desulfurization is high salinity, high COD, height
Features, the intractabilities such as hardness, high fluoride, high silicon, high heavy metal are big.
The sewage zero-discharge processing system that the country generally uses at present generally comprises pretreatment, film concentration, evaporation, crystallization etc.
Step.In above-mentioned existing processing system, pre-process mainly using conventional coagulating sedimentation+softening except hard+filtering technique, the pre- place
Science and engineering skill treatment effect is not high, high energy consumption, take up an area it is larger, it is most important that do not remove the technological measure of high COD in raw water, from
And cause downstream film upgrading unit and evaporative crystallization unit fouling serious, go out salt poor quality, it is difficult to ensure that downstream units is steady
Fixed operation；Common efficient reverse osmosis membrane upgrading unit needs higher chemical cleaning frequency and net water yield is caused to decline, film
Replacement frequency is high, and operating cost is high；Evaporative crystallization is to produce based on mixed salt, it is impossible to be truly realized the technical purity for isolating high-quality
Grade simple substance salt does not accomplish that simple substance salt resource utilization utilizes, and follow-up landfill stabilization is costly；The condensate liquid that system generates still contains
Higher COD, ammonia nitrogen etc., it is impossible to carry out reuse directly as process water.
Invention content
Based on the deficiency and defect present in the above-mentioned prior art, the present invention provides one kind, effectively solve and realize work
Industry sewage zero-discharge problem.
In order to solve the above technical problem, the present invention provides following technical solutions：
A kind of saline sewage processing system, the system include connection pretreatment unit, pre-concentration unit, evaporation element,
Crystalline element, condensate liquid precision processing unit and solid constituent processing recovery unit, which is characterized in that the pretreatment unit is set
There are saline sewage water inlet, outlet of sewer and sludge outlet, pretreatment unit outlet of sewer connects the pre-concentration unit, in advance
Upgrading unit is equipped with production water water outlet and concentrated water water outlet, the concentrated water water outlet connection evaporation element, and evaporation element is equipped with
First condensate outlet and brine outlet, the brine outlet connection crystalline element, crystalline element are equipped with the second condensation
Liquid exports and crystal salt outlet, pre-concentration unit production water water outlet, the first condensate outlet and the connection of the second condensate outlet
The water inlet of the condensate liquid precision processing unit, condensate liquid precision processing unit are additionally provided with recycle-water water outlet, pretreatment unit
Solid constituent processing recovery unit described in sludge outlet and crystalline element crystal salt outlet connection, solid constituent processing recycling are single
Member is respectively equipped with the inlet and outlet of sludge and crystal salt.
Further, the pretreatment unit include DENSADEG potassium permanganate composites, AQUAZUR V-types filter tank and/
Or OXYBLUE advanced oxidations subelement and SMARTRACK ultrafiltration subelements.
Further, the pre-concentration unit is equipped with reverse osmosis membrane concentration system.
Further, the evaporation element is equipped with falling film evaporation system.
Further, the crystalline element is equipped with mix suspending mixing discharge product or mix suspending classification discharge product
Forced circulation crystal system.
Further, the condensate liquid precision processing unit include activated carbon filtering subelement, and/or air lift subelement,
And/or ion exchange subelement.
Further, solid constituent processing recovery unit includes plate compression dehydration subelement, centrifugal dehydration
Unit, dry subelement.
A kind of saline sewage processing method is also provided, including following processing procedure, preprocessing process, steams at pre-concentration process
Hair process, crystallization process, condensate liquid precision processing process and solid constituent processing removal process, which is characterized in that
Pending saline sewage is accessed in the preprocessing process, sewage and sludge, preprocessing process are generated after processing
The sewage of generation carries out pre-concentration process, and sludge carries out solid constituent processing removal process；
Pre-concentration process generates water purification and concentrated water, and water purification carries out condensate liquid precision processing process, and concentrated water is evaporated process；
Evaporation process generates condensate liquid and strong brine, and condensate liquid carries out condensate liquid precision processing process, and strong brine is crystallized
Process；
Crystallization process generates condensate liquid and crystal salt, and condensate liquid carries out condensate liquid precision processing process, and crystal salt carries out solid
Ingredient handles removal process；
Condensate liquid precision processing process generates recycle-water.
Beneficial effects of the present invention：
1st, whole process total solution realizes saline sewage zero-emission, completely eliminates the sewage discharge to neighbouring water body；
2nd, according to different demands, it is customized chemical industry skill optimum choice；
3rd, in pretreatment unit high efficient technology combination can to the full extent to suspended matter, hardness, fluoride, heavy metal,
And the removal of the pollutants such as COD, ensure down stream process units stable operation；
4th, stablize reverse osmosis membrane pre-concentration unit ensure low chemical cleaning frequency, the low film replacement cycle, high availability, with
And low operating cost；
5th, efficient, low energy consumption falling-film evaporating unit, to the full extent can further be concentrated by evaporation brine；
6th, the pressure of discharge product (MSMPR) or mix suspending classification discharge product (MSCPR) is mixed using mix suspending
The crystalline element of circulation crystallization system can flexibly realize mixed salt crystallization or the crystallization of simple substance salt, realize the resource utilization profit of salinity
With；
7th, condensate liquid precision processing unit can ensure that obtain the softened water progress technique reuse of high-purity；
8th, total system have contaminant removal efficiency is high, occupations of land is compact, automatization level is high, it is stable, invest it is low,
The advantages such as operating cost is low.
Description of the drawings
Fig. 1 is a kind of saline sewage zero-discharge treatment system structure diagram.
1- pretreatment units；2- pre-concentration units；3- evaporation elements；4- crystalline elements；5- condensate liquid precision processing units；6-
Solid constituent processing and recovery unit.
Specific embodiment
The preferred embodiment of the present invention is illustrated below in conjunction with attached drawing, it should be understood that embodiment described herein
It is merely to illustrate and explain the present invention, only part of the embodiment of the present invention, instead of all the embodiments, is not used to limit
The fixed present invention.
As shown in Figure 1, the embodiment of the present invention provides a kind of saline sewage zero discharge treatment total solution system
S.M.A.R.T.ZONESTM, the system include connection pretreatment unit 1, pre-concentration unit 2, evaporation element 3, crystalline element 4,
Condensate liquid precision processing unit 5 and solid constituent processing and recovery unit 6.
Pretreatment unit 1 is equipped with water inlet, water outlet and sludge outlet；The water outlet connection pre-concentration list of pretreatment unit 1
Member 2, pre-concentration unit 2 are equipped with production water out and concentrated water outlet, pre-concentration unit concentrated water outlet connection evaporation element 3；Evaporation is single
Member 3 is equipped with condensate outlet and brine outlet, brine outlet connection crystalline element 4；Crystalline element 4 is equipped with condensate outlet
With the outlet of crystallization salt slurry；Production water out, the above-mentioned evaporation element 3 of pre-concentration unit 2 are connected with the condensate outlet of crystalline element 4
Condensate liquid precision processing unit 5, condensate liquid precision processing unit 5 are equipped with inlet and outlet；The sludge of above-mentioned pretreatment unit 1 goes out
The crystallization salt slurry of mouth and crystalline element 4 outlet connection solid constituent processing and recovery unit 6, solid constituent processing and recovery unit
6 are respectively equipped with the inlet and outlet of sludge and crystal salt；
Pretreatment unit 1 be equipped with integrate coagulation, flocculation, clarification precipitation concentration and softening including DENSADEG high
Density sedimentation basin；Constant speed, permanent water level fill homogeneous filtering material, the AQUAZUR V-types filter tank of fully automatic operation, and/or with ozone oxygen
Change and OXYBLUE advanced oxidations unit of biofilter combination and SMARTRACK ultrafiltration etc., with reach effectively remove suspended matter,
Hardness, fluoride, heavy metal, silicon and COD etc., so as to ensure the stable operation of down stream process units unit；
High reliability that pre-concentration unit 2 is equipped with, low cleaning frequency, low film turnover rate reverse osmosis membrane concentration system, protect
The desalted water of card system output high-quality carries out reusing sewage；
The falling film evaporation system of the high and low energy consumption of heat transference efficiency that evaporation element 3 is equipped with discharges pre-concentration unit 2
Strong brine is further concentrated by evaporation, and crystalline element 4 of the salinity in downstream is enable to crystallize out, while reduce setting for crystal system
Meter and operation scale；
Mix suspending mixing discharge product (MSMPR) or mix suspending the classification discharge product that crystalline element 4 is equipped with
(MSCPR) forced circulation crystal system can crystallize out mixed salt or simple substance salt according to different demands, and finally carry out at landfill
It puts or resource utilization utilizes；
The filtering of activated carbon that condensate liquid precision processing unit 4 is equipped with, and/or air lift, and/or ion-exchange process unit, it is right
The further precision processing of condensate liquid that evaporation element 3 and crystalline element 4 generate removes the COD contained in condensate liquid, ammonia nitrogen, total molten
Solution property solid etc., meets the technique reuse requirement of higher standard；
The sludge that pretreatment unit 1 generates is sent to solid constituent processing and recovery unit 6, using plate compression or centrifuge
Deep dehydration is carried out, the filtrate of generation is back to the further circular treatment of pretreatment unit water inlet again, and dewatered sludge can be sent outside
Landfill stabilization；The salt slurry that crystalline element 4 generates is sent to solid constituent processing and recovery unit 6, using push-type centrifuge, drying
Machine carries out deep dehydration and drying, and the mixed salt finally generated can send landfill stabilization, point of the high-quality technical grade purity of generation outside
Salt can carry out resource utilization utilization.
Finally it should be noted that：The foregoing is merely the embodiment of the present invention, are not intended to restrict the invention, although
The present invention is described in detail with reference to the foregoing embodiments, it for those skilled in the art, still can be right
Technical solution recorded in foregoing embodiments modifies or carries out equivalent replacement to which part technical characteristic.It is all
Within the spirit and principles in the present invention, any modification, equivalent replacement, improvement and so on should be included in the protection of the present invention
Within the scope of.
Claims (1)
1. a kind of sewage water treatment method based on saline sewage processing system, which includes the pre- place of connection
Unit, pre-concentration unit, evaporation element, crystalline element, condensate liquid precision processing unit and solid constituent processing recovery unit are managed,
It is characterized in that, the pretreatment unit is equipped with saline sewage water inlet, outlet of sewer and sludge outlet, pretreatment unit sewage
The outlet connection pre-concentration unit, pre-concentration unit are equipped with production water water outlet and concentrated water water outlet, the connection of concentrated water water outlet
The evaporation element, evaporation element are equipped with the first condensate outlet and brine outlet, the brine outlet connection knot
Brilliant unit, crystalline element is equipped with the second condensate outlet and crystal salt exports, pre-concentration unit production water water outlet, the first condensate liquid
The water inlet of condensate liquid precision processing unit described in outlet and the connection of the second condensate outlet, condensate liquid precision processing unit is also
Equipped with recycle-water water outlet, the solid constituent processing described in pretreatment unit sludge outlet and crystalline element crystal salt outlet connection
Recovery unit, solid constituent processing recovery unit are respectively equipped with the inlet and outlet of sludge and crystal salt；The pretreatment list
Member includes potassium permanganate composites, V-type filter tank, advanced oxidation subelement and ultrafiltration subelement；The crystalline element is equipped with mixing
The forced circulation crystal system of product or mix suspending classification discharge product is discharged in the mixing that suspends；The condensate liquid precision processing list
Member includes activated carbon filtering subelement, air lift subelement, ion exchange subelement；The solid constituent processing recovery unit packet
Rubbing board frame filter-press dehydration subelement, centrifugal dehydration subelement, dry subelement；It is dense that the pre-concentration unit is equipped with reverse osmosis membrane
Compression system；The evaporation element is equipped with falling film evaporation system；
It is characterized in that, its sewage water treatment method include following processing procedure, preprocessing process, pre-concentration process, evaporation process,
Crystallization process, condensate liquid precision processing process and solid constituent handle removal process, are accessed in the preprocessing process pending
Saline sewage generates sewage and sludge after processing, the sewage that preprocessing process generates carries out pre-concentration process, and sludge carries out solid
Ingredient handles removal process；
Pre-concentration process generates water purification and concentrated water, and water purification carries out condensate liquid precision processing process, and concentrated water is evaporated process；
Evaporation process generates condensate liquid and strong brine, and condensate liquid carries out condensate liquid precision processing process, and strong brine carries out crystallization process；
Crystallization process generates condensate liquid and crystal salt, and condensate liquid carries out condensate liquid precision processing process, and crystal salt carries out solid constituent
Handle removal process；
Condensate liquid precision processing process generates recycle-water；
Condensate liquid precision processing process further includes the gentle grape process of activated carbon filtering subprocess and ion exchange subprocess, to condensation
The further precision processing of liquid removes COD, ammonia nitrogen, the total dissolved solid contained in condensate liquid；
When the sludge that preprocessing process generates carries out solid constituent processing recycling, depth is carried out using plate compression or centrifuge and is taken off
Water, the filtrate of generation are back to the further circular treatment of pretreatment unit water inlet again, and dewatered sludge sends landfill stabilization outside；Crystallization
When the crystallization salt slurry that process generates is sent into the processing recycling of row solid constituent, depth is carried out using push-type centrifuge, drying machine and is taken off
Water and drying, the mixed salt of generation send landfill stabilization outside, and the high-quality technical grade purity of generation divides salt to carry out resource utilization profit
With.
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| CN110330165A (en) * | 2019-06-05 | 2019-10-15 | 中国石油天然气集团有限公司 | Strong brine zero-emission and sub-prime crystallizing treatment process and processing system |
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| JP6053631B2 (en) * | 2013-07-31 | 2016-12-27 | 三菱重工業株式会社 | Desalination apparatus and desalination method, and method of co-production of fresh water, salt and valuables |
| CN204185326U (en) * | 2014-09-24 | 2015-03-04 | 江苏京源环保股份有限公司 | A kind of power plant desulfurization Wastewater zero-discharge treatment system |
| CN104787951A (en) * | 2014-12-22 | 2015-07-22 | 内蒙古久科康瑞环保科技有限公司 | A treatment system for high-salt waste water |
| CN204356164U (en) * | 2014-12-30 | 2015-05-27 | 中国科学院深圳先进技术研究院 | A kind of water treatment device for high intensity focused ultrasound and Controlling System |
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