CN108191130A - A kind of high organic wastewater evaporative crystallization antiscaling treatment method with high salt and device - Google Patents
A kind of high organic wastewater evaporative crystallization antiscaling treatment method with high salt and device Download PDFInfo
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- CN108191130A CN108191130A CN201711459330.7A CN201711459330A CN108191130A CN 108191130 A CN108191130 A CN 108191130A CN 201711459330 A CN201711459330 A CN 201711459330A CN 108191130 A CN108191130 A CN 108191130A
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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
- C02F5/00—Softening water; Preventing scale; Adding scale preventatives or scale removers to water, e.g. adding sequestering agents
- C02F5/02—Softening water by precipitation of the hardness
- C02F5/06—Softening water by precipitation of the hardness using calcium compounds
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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
- C02F1/042—Prevention of deposits
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Abstract
The invention discloses a kind of high organic wastewater evaporative crystallization scale control treatments device and methods with high salt, belong to technical field of waste water processing.Above-mentioned high organic wastewater evaporative crystallization scale control treatments device with high salt includes：Vaporization chamber；Upper circular tube, radially access vaporization chamber straight section middle part or middle and lower part, lower end connect heating chamber outlet for upper end；Central guide shell is installed in vaporization chamber at liquid level, and there are one angular cuts on central guide shell top, and angular cut is opposite with the direction of vaporization chamber feed inlet, and face vaporization chamber feed inlet is provided with several circular holes；Room is heated, heating chamber outlet is connected with upper circular tube lower end；Lower circulation pipe, upper end are connected on the downside of vaporization chamber cone bucket, lower end connection first circulation pump intake；Eluriate leg, upper end connection vaporization chamber cone bucket bottom.Apparatus of the present invention are simple in structure, realize feed liquid evaporate it is indoor be uniformly distributed, effectively prevent leading to the problems such as fouling, grain size number are too small, crystallization purity is low in evaporation and crystal process.
Description
Technical field
The present invention relates to wastewater processing technology and evaporated crystallization device, more particularly to a kind of high organic wastewater evaporation with high salt
Crystallize scale control treatments device and method.
Background technology
High-salt wastewater refers to the total salinity (Cl industrially generated-、SO42-、Na+、Ca2+、Mg2+Deng) higher waste water.It is high
Salt waste water is essentially from industries such as chemical industry, oil, food processing, printing and dyeing.In the waste water of these industries discharge other than salt, also
Contain a large amount of organic matter.In the prior art, it in order to efficiently use water resource, prevents discharge of wastewater from causing environmental pollution, needs
It is recycled again after desalination, de- organic matter processing are carried out to high-salt wastewater.
By advanced treating and concentration, the organic matter in waste water is accumulated, and contains a large amount of calcium and magnesium plasmas.For this portion
Divide strong brine, mainstream treatment process is to recycle distilled water using evaporative crystallization, while generate crystal salt at present.But waste water enters steaming
Pretreatment is had to pass through before hair crystallization and removes the ingredient that calcium and magnesium etc. easily causes fouling, needs to add a large amount of medicaments, greatly increase
Processing cost.
In addition, in evaporation and crystal process, the crystallization apparatus generally existing solid-liquid mixing of mainstream is uneven at present, especially liquid level
Position can not provide uniform solid-liquid distribution, cause at four peripheral wall surfaces or crystal seed quantity is few at center.As a result it is exactly at liquid level
Feed liquid degree of supersaturation eliminates insufficient, outburst nucleation, and crystal salt is meticulous.Fine size, which can increase, eluriates the negative of purification and centrifugal dehydration
Load.Crystallizer inner wall easily forms salt simultaneously, falls and blocks bottom pipe or salt outlet.
In the prior art, related evaporative crystallization cell structure is as shown in Figure 1.Including vaporization chamber, axial admission pipe, chuck,
Upper circular tube, heating room, forced circulation pump, lower circulation pipe, salt foot, clear liquid turn material mouth, chuck gland steam exhauster, indirect steam and take over
Deng there are more advantages in this kind of evaporative crystallization room, and since the feed liquid after being heated enters from vaporization chamber central tube, and it is attached to transport to liquid level
Closely, the liquid surface evaporation intensity of vaporization chamber center is big, and nearby evaporation intensity is relatively small for barrel, and barrel is opposite to be not easy salt crust
Bar；Feed liquid axially flows in the same direction with crystalline solid in vaporization chamber, and solid-liquid is uniformly mixed；After installing chuck additional in vaporization chamber, convenient for solid-liquid
Separation, clear liquid turn material mouth from clear liquid and drain into next effect, are more suitable for sal prunella coproduction.Shortcoming be after being heated feed liquid still in vaporization chamber
The topmost boiling of interior solution, the degree of supersaturation of solution is maximum herein, and crystal grain is most thin, is unfavorable for degree of supersaturation by larger crystalline substance
Body quickly absorbs, while crystal is difficult to be extended in the evaporation indoor residence time, is unfavorable for obtaining larger crystal；Formed
Big crystal is inhaled into lower circulation pipe, into forced circulation pump after can be broken, especially carried to improve Heat transfer coefficient
It is this broken more strong during high circulation flow velocity, it is generated so as to cause excessive nucleus.
Patent CN103071310A discloses a kind of crystallizing evaporator, including：Vaporization chamber；Center drainage cylinder；Vaporization chamber
Inner cone；Clear liquid turns expects pipe；Educate brilliant expansion chamber baffling cylinder；Upper circular tube；Outer circulation feed nozzle；Heat room；Lower circulation pipe；It forces
Circulating pump；Salt foot；Secondary steam pipe；Gland steam exhauster.There are inner-outer circulations for the crystallizing evaporator, and outer circulation is by vaporization chamber, upper cycle
Pipe, heating room, forced circulation pump, lower circulation pipe are formed；The interior cycle of device by center drainage cylinder, vaporization chamber inner cone, educate it is brilliant heavy
Room baffling cylinder is dropped to form.The invention can reach while can produce the big purity of granularity high salt crystalline substance, further reduce single
The energy consumption of position product, extends normal production cycles, improves the purpose of overall economic efficiency.But the inventive technique scheme is more multiple
It is miscellaneous, and the salt crystalline substance prepared eluriates the waste for causing water resource in the process.
I.e. traditional center input and output material or tangential admission are radially fed, and all there are feed liquids can not be fully distributed in liquid level
Each, especially at wall surface, so the crystal seed in feed liquid also can not be just distributed herein.This results in problem
Occur：1. after feed liquid flash distillation, no crystal seed provides the condition of crystal growth for supersaturated feed liquid.Especially at wall surface, precipitation
Fine crystals do not have crystal seed that can adhere to, and majority is attached to inner wall, form salt.Salt meeting not timing is fallen, and is blocked lower part and is followed
Ring exports and eluriates leg, causes not running.2. due to partially lacking at crystal seed distribution, the supersaturated feed liquid after flash distillation can erupt into
Core forms a large amount of fine crystals, it is impossible to meet the product granularity requirement of crystal salt.3. crystal salt granularity is meticulous, it is unfavorable for follow-up
Separation of solid and liquid, and crystal is smaller, and the impurity such as more easy to carry organic matter also increase difficulty to elutriation.
Invention content
For solve prior art wastewater treatment process in, evaporative crystallization cause fouling, crystallization is too small, crystallization purity is low, tie
The problems such as structure is complicated, the present invention provide a kind of high organic wastewater evaporative crystallization scale control treatments device and method with high salt.
In order to solve the above technical problems, present invention offer technical solution is as follows：
The present invention provides a kind of high organic wastewater evaporative crystallization scale control treatments device with high salt, including：Vaporization chamber；
Upper circular tube, radially the outlet of room is heated in access vaporization chamber straight section middle part or middle and lower part, lower end connection for the upper end；
Central guide shell is installed in the vaporization chamber at liquid level, and the center guide shell top is there are one angular cut, tiltedly
Notch is opposite with the direction of vaporization chamber feed inlet, and face vaporization chamber feed inlet is provided with several circular holes；
Room is heated, heating chamber outlet is connected with the upper circular tube lower end；
First circulation pumps, outlet connection heating chamber inlet；
Lower circulation pipe, the upper end are connected on the downside of the vaporization chamber cone bucket, and lower end connects the first circulation pump intake；
Eluriate leg, the upper end connection vaporization chamber cone bucket bottom；
Mother liquor stands device, is installed on the lower circulation pipe；
Feed inlet stands device lower part positioned at the mother liquor；
Secondary steam pipe is installed at the top of the vaporization chamber.
Further, central guide shell top 100~150mm below liquid level, the vaporization chamber feed inlet top
200~400mm below liquid level, the center guide shell top is higher than at the top of the vaporization chamber feed inlet.
Further, the central guide shell is laterally there are one angular cut, and the angle of angular cut and vertical direction is 50~
80°。
Further, the central guide shell is cylindrical inner cylinder, and diameter accounts for the 70~80% of the vaporization chamber internal diameter；
The height of the center guide shell is 1.5~3 times of intake port；Vaporization chamber feed inlet described in the center guide shell face
The wall surface in direction is provided with circular hole, 10~80mm of aperture.
Further, the vaporization chamber feed inlet in liquid level hereinafter, vaporization chamber feed inlet described in face, sets the center
Guide shell.
Further, described eluriate is additionally provided with interior cycle elutriation pipe, lower elutriation water inlet and positioned at described lower naughty on leg
Wash the salt outlet on the top of water inlet；
The interior cycle is eluriated and second circulation pump is provided on pipe, and interior cycle elutriation pipe is suitable for reading to be connected on the elutriation leg
Portion, interior cycle eluriate the lower mouth of pipe and are connected to elutriation leg lower part；
The salt outlet is arranged on above the lower elutriation water water inlet, and the lower elutriation water inlet and salt outlet are respectively provided with
Lower section of the mouth with eluriating leg junction in the case where the interior cycle eluriates pipe；
Preferably, it is described it is interior cycle eluriate pipe it is suitable for reading away from eluriate leg at the top of 100~400mm, it is described it is interior cycle eluriate pipe under
Mouth is located at more than the salt outlet 100~400mm.
Further, the lower circulation pipe is connected on the downside of the vaporization chamber cone bucket, is connected with the vaporization chamber wall surface, is not stretched
Enter into；The upper circular tube is radially connected to the vaporization chamber straight section, is connected with the vaporization chamber wall surface, does not stretch into.
Ideally feed liquid is laggard to vaporization chamber by heating during operation, can be uniformly distributed in liquid level, such ability
Ensure to make full use of the sectional area of entire liquid level, the degree of supersaturation of feed liquid after flash distillation is made uniformly to discharge.
Raw water enters evaporated crystallization device from lower circulation pipe in the present invention, is mixed with internal feed liquid, is entered by circulating pump
Heat room.Heating room is heated using saturated vapor, and steam is condensed into water, and latent heat is transmitted to feed liquid.Feed liquid warp after heat exchange
It crosses upper circular tube and enters vaporization chamber, feed as radially.The a little higher than feed inlet of liquid level in vaporization chamber, for shown in dotted line in attached drawing 2.Into
Material mouth face center guide shell, feed liquid enter vaporization chamber rear portion and are flowed along guide shell to both sides patch inner wall, another part
Guide shell central part is flowed to from aperture.The inner wall of vaporization chamber either surrounding or central part can be uniformly distributed in this way
Feed liquid ensures that the sectional area for making full use of entire liquid level in this way, and the degree of supersaturation of feed liquid after flash distillation is made uniformly to discharge.During operation
Liquid level is controlled, makes feed inlet that can ensure that pan feeding can flow rapidly to liquid level close to liquid level, realize flash distillation.In likewise,
Centre guide shell top is slightly less than liquid level, while can ensureing that feed liquid is uniformly distributed, also flows rapidly to liquid level flash distillation.
Traditional elutriation leg is washed using external raw water or steam condensate (SC), if crystallization salt impurity is got over
More, then the elutriation liquid needed is more.Increasing for liquid is eluriated, feed temperature in vaporization chamber can be reduced, influences the progress of evaporation.This hair
It is bright to eluriate leg upper and lower part respectively one interface of setting, it is pumped with second circulation and the feed liquid on top is extracted into lower part, thus shape
It is recycled in into one eluriated inside leg.No matter pump discharge it is much also only aspirate evaporation chamber feed liquid, without volume
Liquid is eluriated outside outer introducing.Make to form a strong stirring state inside elutriation leg using interior cycle, crystal salt is made to rub mutually
It wipes, the impurity of its glued on top is cleaned.Again by the elutriation mouth of bottom introduce it is a small amount of external eluriate liquid, will clean fall it is miscellaneous
Matter refunds vaporization chamber, exhausts eventually by mother liquor.It both ensure that the purity of crystallization product salt in this way, also reduce and eluriate what is brought
Energy consumption.
Above-mentioned high organic wastewater evaporative crystallization scale control treatments device processing waste water with high salt is utilized the present invention also provides a kind of
Method, include the following steps：
1) brine waste enters the level-one pretreatment system of evaporative crystallization, is firstly added in the level-one pretreatment system
The medicament of magnesium ion can be removed, reduces the magnesium hardness of brine waste；
2) the pretreated brine waste of level-one enters two level pretreatment system, the basis in the two level pretreatment system
The ratio of calcium ion and sulfate ion adds in calcium chloride or sodium sulphate, forms calcium sulfate crystal seed；
3) the pretreated brine waste of two level is entered by lower circulation pipe in crystallizing evaporator, quantitative outer row's mother liquor, with
The impurity contents such as organic matter should not be exceeded in control system, and makes to maintain certain calcium sulfate seed concentration in crystallizing evaporator；
4) mother liquor arranged outside is dehydrated by clarifying, and will be arranged outside solid, portion filtrate is returned in crystallizing evaporator and recycled；
5) crystal salt that saturation is precipitated forms high purity salt product by eluriating leg cleaning purification.
Further, a concentration of 15~40g/L of the calcium sulfate crystal seed kept in the step 3).
Level-one pretreatment in the above method is processing method commonly used in the prior art, and reagent used is also this field
The common reagent of technical staff, details are not described herein.
The present invention forms calcium sulfate crystal seed, on the one hand not using already existing calcium ion and sulfate ion in waste water
It needs to add medicament and thoroughly remove it, so as to save cost, on the other hand make to keep certain calcium sulfate concentration in system, it can be with
Prevent calcium and magnesium fouling.
The invention has the advantages that：
The central guide shell of setting in vaporization chamber in the present invention, pan feeding can be evenly distributed on entire vaporization chamber inner wall and
At center, so as to provide a uniform boiling surface, in crystallizer the boiling of whole cross section mitigate very much, in any spy of container
The possibility that a fixed part is not all boiled preferentially avoids some or several point part outburst nucleation, forms meticulous crystal,
It is also prevented from forming salt, occluding device at wall surface simultaneously.Compared with prior art, waste water is handled using the present apparatus, may be such that material
Liquid is uniformly distributed in vaporization chamber, and the crystallization purity salt finally obtained can reach more than 99%, and the device cleaning frequency greatly prolongs,
It up to 6 months or more, cleans during crystal salt, can reduce by more than 60% water loss.
Description of the drawings
Fig. 1 is the structure diagram of evaporated crystallization device in the prior art；
Fig. 2 is the structure diagram of high organic wastewater evaporative crystallization scale control treatments device with high salt in the embodiment of the present invention 1；
The structure diagram of high organic wastewater evaporative crystallization scale control treatments device with high salt in Fig. 3 positions embodiment of the present invention 2；
Fig. 4 is the structure of vaporization chamber in the high organic wastewater evaporative crystallization scale control treatments device with high salt of the embodiment of the present invention 1
Schematic diagram.
Specific embodiment
To make the technical problem to be solved in the present invention, technical solution and advantage clearer, below in conjunction with specific implementation
Example and attached drawing are described in detail.
Said program is described further below in conjunction with specific embodiment.It should be understood that these embodiments are for illustrating
The present invention and be not limited to limit the scope of the invention.The implementation condition used in embodiment can be done according to the situation of specific product
Further adjustment, the implementation condition being not specified is usually the condition in routine experiment.
The materials, reagents and the like used in the following examples is commercially available.
The present invention provides a kind of high organic wastewater evaporative crystallization scale control treatments device and method with high salt, and specific implementation is for example
Under.
Embodiment 1
The present invention provides a kind of high organic wastewater evaporative crystallization scale control treatments device with high salt, sees that Fig. 2-4 includes：Evaporation
Room 1；
Upper circular tube 10, radially 1 straight section of access vaporization chamber middle part or middle and lower part, lower end connection heating room 9 go out for the upper end
Mouthful；
Central guide shell 2 is installed in vaporization chamber 1 at liquid level, and there are one angular cut, angular cuts on central 2 top of guide shell
Opposite with the direction of vaporization chamber feed inlet 14, face vaporization chamber feed inlet 14 is provided with several circular holes；
Room 9 is heated, the outlet of heating room 9 is connected with 10 lower end of upper circular tube；
First circulation pump 8, outlet connection heating 9 entrance of room；
Lower circulation pipe 3, the upper end are connected on the downside of 1 cone bucket of vaporization chamber, and lower end connection first circulation pumps 8 entrances；
Eluriate leg 4, the upper end 1 cone bucket bottom of connection vaporization chamber；
Mother liquor stands device 13, is installed on lower circulation pipe 3；
Feed inlet 12 stands 13 lower part of device positioned at mother liquor；
Secondary steam pipe 11 is installed on 1 top of vaporization chamber.
Pan feeding, can be evenly distributed at inner wall and the center of entire vaporization chamber by the central guide shell of setting in vaporization chamber,
So as to provide a uniform boiling surface, the boiling of whole cross section in crystallizer is made to mitigate very much, in container any specific one
The possibility that part is not all boiled preferentially avoids some or several point part outburst nucleation, forms meticulous crystal, simultaneously
It is also prevented from forming salt, occluding device at wall surface.
Further, central 2 top 100~150mm below liquid level of guide shell, 14 top of vaporization chamber feed inlet is in liquid level
200~400mm below, central 2 top of guide shell is higher than 2 top of vaporization chamber feed inlet so that feed liquid can be evenly distributed in
While in vaporization chamber 1, liquid level flash distillation is also flowed rapidly to.
Further, for central guide shell 2 laterally there are one angular cut, the angle of angular cut and vertical direction is 50~80 °.
If cylindrical, charging can only can be only achieved center by aperture, and entire flowing will be based on outer shroud.Central water conservancy diversion
Cylinder 2 has laterally added notch, while outer shroud is fed, can be flowed to middle part, it is ensured that center and surrounding feed liquid can be uniform
Distribution.
Further, central guide shell 2 is cylindrical inner cylinder, and diameter accounts for the 70~80% of 1 internal diameter of vaporization chamber；It leads in center
The height of flow cartridge 2 is 1.5~3 times of intake port；The wall surface in central 2 face vaporization chamber feed inlet of guide shell, 14 direction is opened
There are circular hole, 10~80mm of aperture.
Further, vaporization chamber feed inlet 14 sets central guide shell 2 in liquid level hereinafter, face vaporization chamber feed inlet 14,
Vaporization chamber feed inlet 14 is located at liquid level hereinafter, controlling liquid level when running, and makes vaporization chamber feed inlet 14 close to liquid level, Neng Goubao
Card pan feeding can flow rapidly to liquid level, realize flash distillation.
Further, it eluriates and interior cycle elutriation pipe 6, lower elutriation water inlet 7 is additionally provided on leg 4 and eluriates water inlet positioned at lower
The salt outlet 5 on the top of mouth 7；
Interior cycle is eluriated and second circulation pump is provided on pipe 6, and interior cycle eluriates suitable for reading be connected to of pipe 6 and eluriates 4 top of leg, interior
Cycle eluriates 6 times mouths of pipe and is connected to 4 lower part of elutriation leg；
Salt outlet 5 is arranged on lower 7 top of elutriation water water inlet, and lower elutriation water inlet 7 and salt outlet 5 are arranged at interior follow
Ring eluriates 6 times mouths of pipe with eluriating the lower section of 4 junction of leg；
Preferably, interior cycle elutriation pipe 6 is suitable for reading away from 4 100~400mm of top of leg is eluriated, and interior cycle is eluriated 6 times mouths of pipe and is located at
More than 5 100~400mm of salt outlet.
The setting for eluriating leg is conducive to the removal of impurity in crystal salt, compared with no interior cycle eluriates the elutriation leg of pipe, this
The device of invention can make the purity of its crystal salt reach more than 99% while more than 60% water resource is saved, very big
Water consume and system heat losses are reduced in degree.
Further, lower circulation pipe 3 is connected on the downside of 1 cone bucket of vaporization chamber, is connected with 1 wall surface of vaporization chamber, is not stretched into；On
10 radial direction of circulation pipe is connected to 1 straight section of vaporization chamber, is connected with 1 wall surface of vaporization chamber, does not stretch into, can effectively prevent eluriating inside leg
It blocks stuck.
Embodiment 2
It is vertical structure that room 9 is heated in the present embodiment, and vertical floor space is smaller, remaining is same as Example 1.
Compared with prior art, waste water is handled using 1-2 of the embodiment of the present invention, may be such that feed liquid is uniformly divided in vaporization chamber
Cloth, the crystallization purity salt finally obtained can reach more than 99%, and the device cleaning frequency greatly prolongs, up to 6 months or more, cleaning
During crystal salt, it can reduce by more than 60% water loss.
The crystallization treatment of waste water is carried out using above device, is specifically shown in following embodiment.
Embodiment 3
Power plant desulfurization wastewater, water 10m3/ h, detects its COD content 300mg/L, sodium chloride concentration 65g/L, and calcium ion is dense
Spend 2000mg/L, magnesium ion concentration 5000mg/L, sulfate ion concentration 4000mg/L.
Step 1：Waste water enters level-one pretreatment, adds calcium hydroxide and removes magnesium ion to a concentration of 80mg/L；
Step 2：Primary effluent enters two level pretreatment, adds sodium sulphate and forms calcium sulfate gypsum seed, suspended concentration
20g/L；
Step 3：Secondary effluent enters the evaporated crystallization device in the embodiment of the present invention 1, and level control is more than feed inlet
300mm, while the Yi Shang 150mm at the top of central guide shell；
Step 4：Central draft tube diameter is set as the 80% of vaporization chamber internal diameter, and 60 ° of bevel angle, face feedstock direction is opened
Bore dia 25mm；
Step 5：Eluriate inner recirculation flow amount 4m3Liquid 1m is eluriated in/h, outside3/h。
Obtained product is sodium chloride particle, and moderate purity 99.1%, the device cleaning frequency is 6 months.
Embodiment 4
Power plant desulfurization wastewater, water 5m3/ h, detects its COD content 300mg/L, sodium chloride concentration 55g/L, and calcium ion is dense
Spend 500mg/L, magnesium ion concentration 300mg/L, sulfate ion concentration 12000mg/L.
Step 1：Waste water enters level-one pretreatment, and it is 80mg/L to add calcium hydroxide removal magnesium ion concentration；
Step 2：Primary effluent enters two level pretreatment, adds calcium chloride and forms calcium sulfate gypsum seed, suspended concentration
30g/L；
Step 3：Secondary effluent enters the evaporated crystallization device in the embodiment of the present invention 2, and level control is more than feed inlet
200mm, while the Yi Shang 100mm at the top of central guide shell；
Step 4：Central draft tube diameter is set as the 80% of vaporization chamber internal diameter, and 70 ° of bevel angle, face feedstock direction is opened
Bore dia 20mm；
Step 5：Eluriate inner recirculation flow amount 2m3Liquid 0.5m is eluriated in/h, outside3/h。
Obtained product is sodium chloride particle, and moderate purity 99.3%, the device cleaning frequency is 6 months.
Comparative example 1
Evaporated crystallization device uses device of the prior art, sees attached drawing 1.Remaining condition is identical with the embodiment of the present invention 1.
Obtained product is sodium chloride particle, and moderate purity 97.2%, the device cleaning frequency is 4 months.
By taking embodiment 3 and comparative example 1 as an example, illustrate at high organic wastewater evaporative crystallization antiscale with high salt provided by the invention
Device and evaporated crystallization device of the prior art are managed, parameter comparison in the process of running is shown in Table 1.
Table 1
| Comparative example 1 | Embodiment 1 | |
| Evaporate seed concentration at chamber interior walls | 8g/L | 18g/L |
| Seed concentration in the middle part of vaporization chamber | 16g/L | 16g/L |
| Eluriate flow quantity | 3m3/h | 1m3/h |
| Sodium chloride purity | 97.2% | 99.1% |
| Sodium chloride particle diameter/mm | 0.1~0.3 | 0.4~0.6 |
| The device cleaning frequency | 4 months | 6 months |
As seen from the above table, high organic wastewater evaporative crystallization scale control treatments device with high salt provided by the invention is in vaporization chamber
Seed concentration and vaporization chamber middle part seed concentration are not much different at wall, realize being uniformly distributed for feed liquid substantially, and prepare
The purity of sodium chloride is higher, and the elutriation liquid dosage used is less, and the cleaning frequency of device is also longer.
In summary, central guide shell in the present invention in vaporization chamber is set, pan feeding can be evenly distributed on to entire evaporation
At the inner wall of room and center, so as to provide a uniform boiling surface, in crystallizer the boiling of whole cross section mitigate very much,
The possibility that any specific part of container is not all boiled preferentially avoids some or several point part outburst nucleation, is formed
Meticulous crystal, while be also prevented from forming salt, occluding device at wall surface.It eluriates cycle in leg setting and eluriates pipeline, utilize material
Liquid carries out internal disturbance, and crystal salt is made mutually to clean, washes off the impurity of surface adhesion.Recycling the elutriation liquid of bottom will come off
Impurity refunds ensures that the crystallization purity salt of discharge is met the requirements to evaporation chamber.It in this way can be in the meticulous feelings of grain size number
Under condition, the washing of high intensity is provided, and the external dosage for eluriating liquid can be effectively reduced, reduces energy consumption.The present invention utilizes useless
Already existing calcium ion and sulfate ion in water form calcium sulfate crystal seed, on the one hand do not need to add medicament thoroughly by it
Removal so as to save cost, on the other hand makes to keep certain calcium sulfate concentration in system, can prevent calcium and magnesium fouling.The present invention
High organic wastewater evaporative crystallization scale control treatments apparatus structure with high salt it is simple, realize feed liquid evaporate it is indoor uniformly point
Cloth effectively prevents leading to fouling in evaporation and crystal process, the problems such as crystallization is too small, crystallization purity is low.
The experiment lifted only be the present invention preferable example, the protection domain being not intended to limit the present invention.It should refer to
Go out, for those skilled in the art, without departing from the principles of the present invention, can also make
Several improvements and modifications, these improvements and modifications also should be regarded as protection scope of the present invention.
Claims (10)
1. a kind of high organic wastewater evaporative crystallization scale control treatments device with high salt, which is characterized in that including：Vaporization chamber；
Upper circular tube, radially the outlet of room is heated in access vaporization chamber straight section middle part or middle and lower part, lower end connection for the upper end；
Central guide shell is installed in the vaporization chamber at liquid level, and there are one angular cut, angular cuts on the center guide shell top
Opposite with the direction of vaporization chamber feed inlet, face vaporization chamber feed inlet is provided with several circular holes；
Room is heated, heating chamber outlet is connected with the upper circular tube lower end；
First circulation pumps, outlet connection heating chamber inlet；
Lower circulation pipe, the upper end are connected on the downside of the vaporization chamber cone bucket, and lower end connects the first circulation pump intake；
Eluriate leg, the upper end connection vaporization chamber cone bucket bottom；
Mother liquor stands device, is installed on the lower circulation pipe；
Feed inlet stands device lower part positioned at the mother liquor；
Secondary steam pipe is installed at the top of the vaporization chamber.
2. high organic wastewater evaporative crystallization scale control treatments device with high salt according to claim 1, which is characterized in that described
Central guide shell top 100~150mm below liquid level, vaporization chamber feed inlet top 200~400mm below liquid level,
Higher than at the top of the vaporization chamber feed inlet at the top of the center guide shell.
3. high organic wastewater evaporative crystallization scale control treatments device with high salt according to claim 2, which is characterized in that described
The angle of angular cut there are one central guide shell is lateral, angular cut and vertical direction is 50~80 °.
4. high organic wastewater evaporative crystallization scale control treatments device with high salt according to claim 3, which is characterized in that described
Central guide shell is cylindrical inner cylinder, and diameter accounts for the 70~80% of the vaporization chamber internal diameter；It is described center guide shell height be
1.5~3 times of intake port；The wall surface in vaporization chamber feed inlet direction is provided with circular hole, hole described in the center guide shell face
10~80mm of diameter.
5. high organic wastewater evaporative crystallization scale control treatments device with high salt according to claim 1, which is characterized in that described
Vaporization chamber feed inlet is in liquid level hereinafter, vaporization chamber feed inlet described in face, sets the central guide shell.
6. high organic wastewater evaporative crystallization scale control treatments device with high salt according to claim 1, which is characterized in that described
It eluriates and interior cycle elutriation pipe, lower elutriation water inlet and the salt discharge positioned at the lower top for eluriating water inlet is additionally provided on leg
Mouthful；
The interior cycle is eluriated and second circulation pump is provided on pipe, and interior cycle elutriation pipe is suitable for reading to be connected to the elutriation leg top,
Interior cycle eluriates the lower mouth of pipe and is connected to elutriation leg lower part；
The salt outlet is arranged on above the lower elutriation water water inlet, and the lower elutriation water inlet and salt outlet are arranged at institute
It states interior cycle and eluriates lower section of the lower mouth of pipe with eluriating leg junction.
7. high organic wastewater evaporative crystallization scale control treatments device with high salt according to claim 1, which is characterized in that described
Interior cycle elutriation pipe is suitable for reading away from 100~400mm at the top of leg is eluriated, and the interior lower mouth of cycle elutriation pipe is located at more than the salt outlet
100~400mm.
8. high organic wastewater evaporative crystallization scale control treatments device with high salt according to claim 1, which is characterized in that described
Lower circulation pipe is connected on the downside of the vaporization chamber cone bucket, is connected with the vaporization chamber wall surface, is not stretched into；The upper circular tube diameter
To the vaporization chamber straight section is connected to, it is connected with the vaporization chamber wall surface, does not stretch into.
9. a kind of handled using any high organic wastewater evaporative crystallization scale control treatments devices with high salt of claim 1-8 is given up
The method of water, which is characterized in that include the following steps：
1) brine waste enters the level-one pretreatment system of evaporative crystallization, and being firstly added in the level-one pretreatment system can
The medicament of magnesium ion is removed, reduces the magnesium hardness of brine waste；
2) the pretreated brine waste of level-one enters two level pretreatment system, in the two level pretreatment system according to calcium from
The ratio of son and sulfate ion adds in calcium chloride or sodium sulphate, forms calcium sulfate crystal seed；
3) the pretreated brine waste of two level is entered by lower circulation pipe in crystallizing evaporator, quantitative outer row's mother liquor, with control
The impurity contents such as organic matter should not be exceeded in system, and makes to maintain certain calcium sulfate seed concentration in crystallizing evaporator；
4) mother liquor arranged outside is dehydrated by clarifying, and will be arranged outside solid, portion filtrate is returned in crystallizing evaporator and recycled；
5) crystal salt that saturation is precipitated forms high purity salt product by eluriating leg cleaning purification.
10. the method for high organic wastewater evaporative crystallization scale control treatments device processing waste water with high salt according to claim 9,
It is characterized in that, a concentration of 15~40g/L of the calcium sulfate crystal seed kept in the step 3).
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