CN108516603A - A kind of saliferous process for treating acidic sewage and system - Google Patents
A kind of saliferous process for treating acidic sewage and system Download PDFInfo
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- CN108516603A CN108516603A CN201810679468.6A CN201810679468A CN108516603A CN 108516603 A CN108516603 A CN 108516603A CN 201810679468 A CN201810679468 A CN 201810679468A CN 108516603 A CN108516603 A CN 108516603A
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
- C02F1/06—Flash evaporation
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
- C02F1/043—Details
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
- C02F1/048—Purification of waste water by evaporation
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- Hydrology & Water Resources (AREA)
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- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
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- Organic Chemistry (AREA)
- Heat Treatment Of Water, Waste Water Or Sewage (AREA)
- Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
Abstract
The present invention relates to chemical fields, in particular to a kind of saliferous process for treating acidic sewage and system.Saliferous acidity waste water treatment system includes that sequentially connected level-one is concentrated by evaporation workshop section, dual evaporation concentration section.Saliferous acid waste water is flashed by primary flash tank, saliferous acid waste water is concentrated, it is detached into level-one vapor-liquid separation tank, saliferous acid waste water enters two-stage flash tank and concentrates again after the separation of level-one vapor-liquid separation tank, saliferous acid waste water reaches saturation, part salts out, and waste acid concentration and dissolving salt evaporative crystallization are carried out at the same time, and achieve the purpose that separation.Concentration operation environment is good, it is entirely avoided acid gas exhaust emission, almost without three waste discharge, environmental emission reduction.
Description
Technical field
The present invention relates to chemical fields, in particular to a kind of saliferous process for treating acidic sewage and system.
Background technology
Common one kind when acidic and alkaline waste water is wastewater treatment.Acid waste water essentially from steel plant, chemical plant, dyestuff factory,
Electroplate factory and mine etc., wastewater treatment want keypoint treatment to contain various harmful substances or heavy metal salt.It is sour in wastewater treatment
Mass fraction difference is very big, and low is less than 1%, and high is more than 10%.Alkaline waste water is essentially from printing and dyeing mill, Leather Factory, papermaking
Factory, oil plant etc..When wastewater treatment, it can encounter containing organic base or contain inorganic base.The mass fraction some of alkali is higher than 5%, has
Less than 1%.In acidic and alkaline waste water, in addition to containing soda acid, often contain acid salt, basic salt and other inorganic matters and organic matter.
Saliferous acid waste water has stronger corrosivity, is such as not added with improvement and is expelled directly out, can corrode pipe duct and structures；Row
Enter water body, the pH value of water body can be changed, interferes, and influence the growth and fish production of aquatile；It is discharged into farmland, soil can be changed
The property of earth makes soil acidification or salinization of soil, harms the crops；It is also waste that acid-base raw materials, which are lost in,.So acidic and alkaline waste water should use up
Amount recycles.
Existing acidic and alkaline waste water treatment technology, is generally used for the acidic and alkaline waste water of low concentration, ejected wash water, alkali cleaning such as descaling bath
The rinse water of slot, in generally use and wastewater treatment；A kind of waste water of the same usual primary discharge of factory, needs a large amount of neutralizers
Processing, causes wastewater treatment high cost.
Invention content
The purpose of the present invention is to provide a kind of saliferous process for treating acidic sewage and system, it is intended to improve existing contain
The problem of a large amount of neutralizers of salt acidic wastewater treatment needs handle, cause wastewater treatment high cost.
The present invention provides a kind of technical solution：
A kind of saliferous acidity waste water treatment system, saliferous acidity waste water treatment system include：
Level-one is concentrated by evaporation workshop section, and it includes primary flash tank and primary flash tank connected one that level-one, which is concentrated by evaporation workshop section,
Grade vapor-liquid separation tank；
Dual evaporation concentration section, dual evaporation concentration section include two-stage flash tank and two-stage flash tank connected two
Grade vapor-liquid separation tank；Two-stage flash tank is connect with the liquid outlet of level-one vapor-liquid separation tank.
In other embodiments of the invention, above-mentioned level-one evaporation and concentration workshop section further includes：
Level-one evaporator, level-one evaporator inlet are connect with primary flash tank, level-one evaporator outlet and level-one vapour-liquid point
It is connected from tank, level-one vapor-liquid separation tank liquid outlet is connect with level-one evaporator inlet.
In other embodiments of the invention, above-mentioned dual evaporation concentration section further includes：
Secondary evaporimeter, secondary evaporimeter entrance are connect with two-stage flash tank, secondary evaporimeter outlet and two level vapour-liquid point
It is connected from tank, two level vapor-liquid separation tank liquid outlet is connect with secondary evaporimeter entrance.
In other embodiments of the invention, above-mentioned saliferous acidity waste water treatment system further includes：
Strong brine tank, strong brine tank are connected with the outlet of two level vapor-liquid separation tank, and strong brine tank connects with secondary evaporimeter entrance
It connects；
Preferably, strong brine tank is connect by strong brine circulating pump with secondary evaporimeter entrance；
Preferably, strong brine circulating pump is in steel lining FEP centrifugal pumps, steel lining PFA centrifugal pumps or lining tetrafluoro diaphragm pump
Any one.
In other embodiments of the invention, above-mentioned saliferous acidity waste water treatment system further includes：
Level-one preheater, the outlet of level-one vapor-liquid separation tank are connect with level-one preheater, are level-one preheater heat supply；Level-one is pre-
Hot device is connect with primary flash tank entrance, and the saliferous acid waste water after being preheated by level-one preheater enters primary flash tank.
In other embodiments of the invention, it further includes first-stage condenser, level-one condensation that above-mentioned level-one, which is concentrated by evaporation workshop section,
Device is connect with primary flash tank.
In other embodiments of the invention, above-mentioned dual evaporation concentration section further includes secondary condenser, B-grade condensation
Device is connect with two level vapor-liquid separation tank.
In other embodiments of the invention, above-mentioned saliferous acidity waste water treatment system further includes：
Water conservancy ejector vacuum pump, water conservancy ejector vacuum pump is concentrated by evaporation workshop section with level-one, dual evaporation concentration section coordinates；
Preferably, water conservancy ejector vacuum pump is made of anti-rot plastic.
The present invention also provides a kind of technical solutions：
A kind of saliferous process for treating acidic sewage includes mainly：
Saliferous acid waste water is after the flash distillation of primary flash tank by level-one vapor-liquid separation tank gas-liquid separation；
The liquid phase that level-one vapor-liquid separation tank gas-liquid separation obtains is flashed by two-stage flash tank, then through two level vapor-liquid separation
Tank detaches.
In other embodiments of the invention, the liquid phase that above-mentioned level-one vapor-liquid separation tank gas-liquid separation obtains first passes through level-one
It is again introduced into level-one vapor-liquid separation tank gas-liquid separation after evaporator evaporation, is then flashed again by two-stage flash tank；
The isolated liquid phase of two level vapor-liquid separation tank is again introduced into two level vapor-liquid separation after being evaporated by secondary evaporimeter
Tank detaches.
The advantageous effect of saliferous process for treating acidic sewage provided in an embodiment of the present invention and system is：
Saliferous acid waste water is flashed by primary flash tank, and saliferous acid waste water is concentrated, into level-one vapor-liquid separation tank
Separation, saliferous acid waste water enters two-stage flash tank and concentrates again after the separation of level-one vapor-liquid separation tank, and saliferous acid waste water reaches
Saturation, partly salts out, waste acid concentration and dissolving salt evaporative crystallization are carried out at the same time, and achieve the purpose that separation.Concentration operation environment
It is good, it is entirely avoided acid gas exhaust emission, almost without three waste discharge, environmental emission reduction.
Dual evaporation concentration section is concentrated by evaporation using strong brine circulating pump forced circulation strong brine tank supernatant, can be kept away
Exempt from saliferous acid waste water leads to the blockage that exchanges heat in concentration process because salt analyzes.The salinity being precipitated is concentrated by evaporation in concentration salt
Water pot bottom is finally discharged by bottom salt outlet.
Water conservancy ejector vacuum pump is made of anti-rot plastic.It can cause to avoid sucking acid gas corrosion vacuum pump ontology true
Sky destroys.
When saliferous acid waste water acid concentration is more than 10%, novel saliferous acid waste water evaporation concentration technique can be by spent acid
Concentration and dissolving salt evaporative crystallization are carried out at the same time, and achieve the purpose that separation finally by strong brine tank.
Description of the drawings
In order to illustrate the technical solution of the embodiments of the present invention more clearly, below will be to needed in the embodiment attached
Figure is briefly described, it should be understood that the following drawings illustrates only certain embodiments of the present invention, therefore is not construed as pair
The restriction of range for those of ordinary skill in the art without creative efforts, can also be according to this
A little attached drawings obtain other relevant attached drawings.
Fig. 1 shows the general flow chart of saliferous acidity waste water treatment system provided in an embodiment of the present invention；
Fig. 2 shows the flow charts that level-one provided in an embodiment of the present invention is concentrated by evaporation workshop section；
Fig. 3 shows the flow chart of dual evaporation concentration section provided in an embodiment of the present invention；
Fig. 4 shows the process flow chart of saliferous acidity waste water treatment system provided in an embodiment of the present invention.
Icon：100- saliferous acidity waste water treatment systems；101- level-one preheaters；102- strong brine tanks；103- strong brines
Circulating pump；104- water conservancy ejector vacuum pumps；110- level-ones are concentrated by evaporation workshop section；111- primary flash tanks；112- level-one vapour-liquids point
From tank；113- level-one evaporators；114- first-stage condensers；120- dual evaporation concentration sections；121- two-stage flash tanks；122- bis-
Grade vapor-liquid separation tank；123- secondary evaporimeters；124- secondary condensers.
Specific implementation mode
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.The present invention being usually described and illustrated herein in the accompanying drawings is implemented
The component of example can be arranged and be designed with a variety of different configurations.
Therefore, below the detailed description of the embodiment of the present invention to providing in the accompanying drawings be not intended to limit it is claimed
The scope of the present invention, but be merely representative of the present invention selected embodiment.Based on the embodiments of the present invention, this field is common
The every other embodiment that technical staff is obtained without creative efforts belongs to the model that the present invention protects
It encloses.
It should be noted that：Similar label and letter indicate similar terms in following attached drawing, therefore, once a certain Xiang Yi
It is defined, then it further need not be defined and explained in subsequent attached drawing in a attached drawing.
In the description of the embodiment of the present invention, it is to be understood that the orientation or positional relationship of instruction is based on attached drawing institute
The orientation or positional relationship the shown invention product using when the orientation or positional relationship or ability usually put
The orientation or positional relationship that field technique personnel usually understand, is merely for convenience of description of the present invention and simplification of the description, without referring to
Show or imply that signified equipment or element must have a particular orientation, with specific azimuth configuration and operation, therefore cannot manage
Solution is limitation of the present invention.
In addition, term " level-one ", " two level " etc. are only used for distinguishing description, it is not understood to indicate or imply relatively important
Property.
In the description of the embodiment of the present invention, it is also necessary to which explanation is unless specifically defined or limited otherwise, term
" setting ", " installation ", " connection " shall be understood in a broad sense, for example, it may be fixedly connected, may be a detachable connection or one
Connect to body；It can be directly connected, can also can be indirectly connected through an intermediary the connection inside two elements.
For the ordinary skill in the art, the concrete meaning of above-mentioned term in the present invention can be understood with concrete condition.
Embodiment
Fig. 1 shows the general flow chart of saliferous acidity waste water treatment system 100 provided in an embodiment of the present invention.Please refer to figure
1, present embodiments provide a kind of saliferous acidity waste water treatment system 100, be mainly used for the acid waste water to contain salt processing with
And recycling.
Saliferous acidity waste water treatment system 100 includes that level-one is concentrated by evaporation workshop section 110, dual evaporation concentration section 120.Two
Grade is concentrated by evaporation workshop section 120 and is connect with level-one evaporation and concentration workshop section 110.
It includes primary flash tank 111, level-one vapor-liquid separation tank 112 that level-one, which is concentrated by evaporation workshop section 110,；Level-one vapor-liquid separation tank
112 connect with primary flash tank 111.
Primary flash tank 111, level-one vapor-liquid separation tank 112, two-stage flash tank 121, two level vapor-liquid separation tank 122 and dense
102 material of brine tank is enamel, in other embodiments, or steel lining tetrafluoro material.
Dual evaporation concentration section 120 includes two-stage flash tank 121, two level vapor-liquid separation tank 122；Two-stage flash tank 121
It is connect with two level vapor-liquid separation tank 122.Two-stage flash tank 121 is connect with the liquid outlet of level-one vapor-liquid separation tank 112.
Saliferous acid waste water is flashed by primary flash tank 111, and saliferous acid waste water is concentrated, into level-one vapor-liquid separation
Tank 112 detaches, and saliferous acid waste water enters two-stage flash tank 121 and concentrates again after level-one vapor-liquid separation tank 112 detaches, hydrochloric
Property waste water reaches saturation, partly salts out, waste acid concentration and dissolving salt evaporative crystallization are carried out at the same time, and achieve the purpose that separation.With
For other method for concentration compared to having a clear superiority, concentration operation environment is good, it is entirely avoided acid gas exhaust emission, almost without the three wastes
Discharge, environmental emission reduction.
Fig. 2 shows the flow charts that level-one provided in an embodiment of the present invention is concentrated by evaporation workshop section 110.Please refer to Fig. 2.
Described in presenting, it includes primary flash tank 111, level-one vapor-liquid separation tank 112 that level-one, which is concentrated by evaporation workshop section 110,；Level-one
Vapor-liquid separation tank 112 is connect with primary flash tank 111.
In the present embodiment, it further includes level-one evaporator 113,113 entrance of level-one evaporator that level-one, which is concentrated by evaporation workshop section 110,
It is connect with primary flash tank 111, the outlet of level-one evaporator 113 is connect with level-one vapor-liquid separation tank 112, level-one vapor-liquid separation tank
112 liquid outlets are connect with 113 entrance of level-one evaporator.
Primary flash tank 111 flashes, and saliferous acid waste water is concentrated, and the liquid phase of primary flash tank 111 is again by level-one
Evaporator 113 concentrates, evaporation section water.The liquid phase of 112 liquid outlet of level-one vapor-liquid separation tank is again introduced into level-one evaporator 113
It concentrates again, increases the content of salt in salt acidic waste water, level-one vapor-liquid separation tank is again introduced into after the evaporation of level-one evaporator 113
112 separation, gas phase is vapor after recycling a period of time, and liquid phase enters two-stage flash tank 121.
Further, in the present embodiment, saliferous acidity waste water treatment system 100 further includes level-one preheater 101, level-one
The outlet of vapor-liquid separation tank 112 is connect with level-one preheater 101, is 101 heat supply of level-one preheater；Level-one preheater 101 and level-one
111 entrance of flash tank connects, and the saliferous acid waste water after being preheated by level-one preheater 101 enters primary flash tank 111.
In detail, saliferous acid waste water passes through before entering primary flash tank 111 with 112 gas phase of level-one vapor-liquid separation tank
Level-one preheater 101 carries out heat exchange；Achieve the purpose that heat utilization, while being heated to saliferous acid waste water, avoids one
The waste of grade 112 gas phase heat of vapor-liquid separation tank.
In the present embodiment, it further includes first-stage condenser 114, first-stage condenser 114 and one that level-one, which is concentrated by evaporation workshop section 110,
Grade flash tank 111 connects.In the present embodiment, first-stage condenser 114 is connect with level-one preheater 101, condensation level-one vapour-liquid point
Vapor is condensed into liquid by the gas phase from tank 112.
Fig. 3 shows the flow chart of dual evaporation concentration section 120 provided in an embodiment of the present invention.Please refer to Fig. 3.
Dual evaporation concentration section 120 includes two-stage flash tank 121, two level vapor-liquid separation tank 122.
In the present embodiment, dual evaporation concentration section 120 further includes secondary evaporimeter 123,123 entrance of secondary evaporimeter
It is connect with two-stage flash tank 121, the outlet of secondary evaporimeter 123 is connect with two level vapor-liquid separation tank 122, two level vapor-liquid separation tank
122 liquid outlets are connect with 123 entrance of secondary evaporimeter.
Correspondingly, the liquid phase of level-one vapor-liquid separation tank 112 enters 121 flash concentration of two-stage flash tank, and partial crystals are precipitated,
121 supernatant liquid of two-stage flash tank enters 123 evaporation section vapor of secondary evaporimeter, 123 evaporation section water of secondary evaporimeter
It is detached into two level vapor-liquid separation tank 122 after steam, a large amount of crystal, supernatant is contained in two level vapor-liquid separation tank 122
The evaporation of secondary evaporimeter 123 is again introduced into be recycled.
In the present embodiment, saliferous acidity waste water treatment system 100 further includes strong brine tank 102, strong brine tank 102 and two
The outlet connection of grade vapor-liquid separation tank 122, strong brine tank 102 are connect with 123 entrance of secondary evaporimeter.
From the above, 121 flash concentration of two-stage flash tank, partial crystals are precipitated, and gas phase enters two level vapor-liquid separation tank 122
Separation, crystal and liquid enter strong brine tank 102, and 102 supernatant of strong brine tank is being delivered to the evaporation of secondary evaporimeter 123 again
It is recycled.Correspondingly, the crystal and liquid that two level vapor-liquid separation tank 122 detaches enter strong brine tank 102.
In the present embodiment, strong brine tank 102 is connect by strong brine circulating pump 103 with 123 entrance of secondary evaporimeter.
In the present embodiment, strong brine circulating pump 103 is steel lining FEP centrifugal pumps, in other embodiments of the invention, strong brine circulating pump
103 may be steel lining PFA centrifugal pumps or lining tetrafluoro diaphragm pump etc..Steel lining PFA centrifugal pumps can be reached with high temperature resistant 200 DEG C with
On, ensure forced-circulation evaporation system normal operation.
Dual evaporation concentration section 120 is dense using 103 forced circulation strong brine tank of strong brine circulating pump, 102 supernatant evaporation
Contracting can lead to the blockage that exchanges heat in concentration process to avoid hydrochloric property waste water because salt analyzes.It is concentrated by evaporation the salt being precipitated
Divide in 102 bottom of strong brine tank, is finally discharged by bottom salt outlet.
In the present embodiment, dual evaporation concentration section 120 further includes secondary condenser 124, secondary condenser 124 and two
Grade vapor-liquid separation tank 122 connects.Gas phase after the separation of two level vapor-liquid separation tank 122 enters after being condensed by secondary condenser 124
Condensate water pot.
Fig. 4 shows the process flow chart of saliferous acidity waste water treatment system 100 provided in an embodiment of the present invention.It please refers to
Fig. 4.
In the present embodiment, saliferous acidity waste water treatment system 100 further includes water conservancy ejector vacuum pump 104, water conservancy injection
Vacuum pump 104 is concentrated by evaporation workshop section 110 with level-one, dual evaporation concentration section 120 coordinates.
In the present embodiment, water conservancy ejector vacuum pump 104 is connected by pipeline and secondary condenser 124, first-stage condenser 114
It connects.The vacuum of the flow control saliferous acidity waste water treatment system 100 of water conservancy ejector vacuum pump 104, in the present embodiment, water conservancy
Ejector vacuum pump 104 is made of anti-rot plastic.It can lead to vacuum breaking to avoid sucking acid gas corrosion vacuum pump ontology.
In other embodiments of the invention, water conservancy ejector vacuum pump 104 can also be replaced with ceramic water-ring vacuum pump
Generation.
In the present embodiment, secondary evaporimeter 123 is all made of silicon carbide heat exchanger, silicon carbide tool with level-one evaporator 113
There is high corrosion-resistant, anti-oxidant and erosive wear resistance, is resistant to high-concentration sulfuric acid, nitric acid, phosphoric acid, mixed acid, highly basic, oxidant
Deng, be uniquely can hydrofluoric acid corrosion resistance ceramic material, and service life is permanent, is the outstanding heat transmission equipment of heat exchange performance
Make material.
The major advantage of saliferous acidity waste water treatment system 100 provided in an embodiment of the present invention is：
Saliferous acid waste water is flashed by primary flash tank 111, and saliferous acid waste water is concentrated, into level-one vapor-liquid separation
Tank 112 detaches, and saliferous acid waste water enters two-stage flash tank 121 and concentrates again after level-one vapor-liquid separation tank 112 detaches, hydrochloric
Property waste water reaches saturation, partly salts out, waste acid concentration and dissolving salt evaporative crystallization are carried out at the same time, and achieve the purpose that separation.With
For other method for concentration compared to having a clear superiority, concentration operation environment is good, it is entirely avoided acid gas exhaust emission, almost without the three wastes
Discharge, environmental emission reduction.
Dual evaporation concentration section 120 is dense using 103 forced circulation strong brine tank of strong brine circulating pump, 102 supernatant evaporation
Contracting can lead to the blockage that exchanges heat in concentration process to avoid hydrochloric property waste water because salt analyzes.It is concentrated by evaporation the salt being precipitated
Divide in 102 bottom of strong brine tank, is finally discharged by bottom salt outlet.
Water conservancy ejector vacuum pump 104 is made of anti-rot plastic.It can be led to avoid sucking acid gas corrosion vacuum pump ontology
Cause vacuum breaking.
When saliferous acid waste water acid concentration is higher (be more than 10%), novel saliferous acid waste water evaporation concentration technique can be with
Waste acid concentration and dissolving salt evaporative crystallization are carried out at the same time, achieve the purpose that separation finally by strong brine tank 102.
The present invention also provides a kind of saliferous process for treating acidic sewage, include mainly：
Saliferous acid waste water is after the flash distillation of primary flash tank 111 by 112 gas-liquid separation of level-one vapor-liquid separation tank；
The liquid phase that 112 gas-liquid separation of level-one vapor-liquid separation tank obtains is flashed by two-stage flash tank 121, then through two level vapour
Liquid knockout drum 122 detaches.
Further, the liquid phase that above-mentioned 112 gas-liquid separation of level-one vapor-liquid separation tank obtains first passes through the steaming of level-one evaporator 113
It is again introduced into 112 gas-liquid separation of level-one vapor-liquid separation tank after hair, is then flashed again by two-stage flash tank 121；
The isolated liquid phase of two level vapor-liquid separation tank 122 is again introduced into two level vapour after being evaporated by secondary evaporimeter 123
Liquid knockout drum 122 detaches.
Saliferous process for treating acidic sewage is concentrated using vacuum forced-circulation evaporation, is had compared with other method for concentration apparent
Advantage, concentration operation environment are good, it is entirely avoided acid gas exhaust emission, almost without three waste discharge, environmental emission reduction.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, any made by repair
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of saliferous acidity waste water treatment system, which is characterized in that the saliferous acidity waste water treatment system includes：
Level-one is concentrated by evaporation workshop section, and the level-one is concentrated by evaporation workshop section and includes primary flash tank, connect with the primary flash tank
Level-one vapor-liquid separation tank；
Dual evaporation concentration section, the dual evaporation concentration section include two-stage flash tank, are connect with the two-stage flash tank
Two level vapor-liquid separation tank；The two-stage flash tank is connect with the liquid outlet of the level-one vapor-liquid separation tank.
2. saliferous acidity waste water treatment system according to claim 1, which is characterized in that the level-one is concentrated by evaporation workshop section
Further include：
Level-one evaporator, the level-one evaporator inlet are connect with the primary flash tank, the level-one evaporator outlet and institute
The connection of level-one vapor-liquid separation tank is stated, the level-one vapor-liquid separation tank liquid outlet is connect with the level-one evaporator inlet.
3. saliferous acidity waste water treatment system according to claim 1, which is characterized in that the dual evaporation concentration section
Further include：
Secondary evaporimeter, the secondary evaporimeter entrance are connect with the two-stage flash tank, the secondary evaporimeter outlet and institute
The connection of two level vapor-liquid separation tank is stated, the two level vapor-liquid separation tank liquid outlet is connect with the secondary evaporimeter entrance.
4. saliferous acidity waste water treatment system according to claim 3, which is characterized in that the saliferous acidity wastewater treatment
System further includes：
Strong brine tank, the strong brine tank are connected with two level vapor-liquid separation tank outlet, the strong brine tank and the two level
Evaporator inlet connects；
Preferably, the strong brine tank is connect by strong brine circulating pump with the secondary evaporimeter entrance；
Preferably, the strong brine circulating pump is in steel lining FEP centrifugal pumps, steel lining PFA centrifugal pumps or lining tetrafluoro diaphragm pump
Any one.
5. according to claim 1-4 any one of them saliferous acidity waste water treatment systems, which is characterized in that the saliferous is acid
Waste water treatment system further includes：
Level-one preheater, the level-one vapor-liquid separation tank outlet connect with the level-one preheater, are supplied for the level-one preheater
Heat；The level-one preheater is connect with the primary flash tank entrance, the saliferous spent acidic after being preheated by the level-one preheater
Water enters the primary flash tank.
6. saliferous acidity waste water treatment system according to claim 1, which is characterized in that the level-one is concentrated by evaporation workshop section
Further include first-stage condenser, the first-stage condenser is connect with the level-one vapor-liquid separation tank.
7. saliferous acidity waste water treatment system according to claim 1, which is characterized in that the dual evaporation concentration section
Further include secondary condenser, the secondary condenser is connect with the two level vapor-liquid separation tank.
8. saliferous acidity waste water treatment system according to claim 1, which is characterized in that the saliferous acidity wastewater treatment
System further includes：
Water conservancy ejector vacuum pump, the water conservancy ejector vacuum pump is concentrated by evaporation workshop section with the level-one, the dual evaporation concentrates
Workshop section coordinates；
Preferably, the water conservancy ejector vacuum pump is made of anti-rot plastic.
9. a kind of saliferous process for treating acidic sewage, which is characterized in that include mainly：
Saliferous acid waste water is after the flash distillation of primary flash tank by level-one vapor-liquid separation tank gas-liquid separation；
The liquid phase that the level-one vapor-liquid separation tank gas-liquid separation obtains is flashed by two-stage flash tank, then through two level vapor-liquid separation
Tank detaches.
10. saliferous process for treating acidic sewage according to claim 9, which is characterized in that
The liquid phase that the level-one vapor-liquid separation tank gas-liquid separation obtains is again introduced into described one after first passing through the evaporation of level-one evaporator
Grade vapor-liquid separation tank gas-liquid separation, is then flashed by the two-stage flash tank again；
The isolated liquid phase of the two level vapor-liquid separation tank is again introduced into the two level vapour-liquid after being evaporated by secondary evaporimeter
Knockout drum detaches.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108840310A (en) * | 2018-09-27 | 2018-11-20 | 淄博晟钛复合材料科技有限公司 | A kind of device and its technique of producing hydrogen chloride by resolving deep from dilute hydrochloric acid |
| CN114605018A (en) * | 2022-02-04 | 2022-06-10 | 重庆大学 | Method for treating phosphorus-containing fluorine-containing high-salt organic wastewater and recycling salt |
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