CN208995272U - A kind of system recycling efficient resource from glass thinning acid pickle - Google Patents
A kind of system recycling efficient resource from glass thinning acid pickle Download PDFInfo
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Abstract
The system that the utility model relates to a kind of to recycle efficient resource from glass thinning acid pickle, including first processing module, Second processing module, third processing module and fourth processing module, the first processing module includes sequentially connected first reaction kettle, potassium fluosilicate solid-liquid separating machine, filter, and first reaction kettle includes that glass thinning acid pickle input port and potassium chloride add mouth；The potassium fluosilicate solid-liquid separating machine is connected by pipeline with the discharge port of first reaction kettle, solids after potassium fluosilicate solid-liquid separating machine separation enters next processing module, and the liquid after potassium fluosilicate solid-liquid separating machine separation enters after the filter is filtered and enters in thinning acid solution dosage bunker so that production line is stand-by.The utility model effectively increases the rate of recovery of hydrofluoric acid, so that fluorine resource is all utilized effectively；Zero-emission is realized, harmless treatment that it goes without doing, cost is greatly reduced.
Description
Technical field
The utility model relates to offal treatment fields in glass thinning, particularly relate to one kind from glass thinning acid pickle
Recycle the method and system of efficient resource.
Background technique
Electronic equipment develops towards lightening direction always, so in the glass display screen of mobile device or handheld device
In production process, there are one of glass thinning process, the mix acid liquor mixed using hydrofluoric acid with other inorganic acids, by display screen glass
Glass makes up to the thickness of technique requirement by chemical attack mode；With the progress of thinning process, be thinned acid solution component with it is dense
Degree constantly variation, must just be replaced after thinned acid solution component reaches certain numerical value with concentration, otherwise will seriously affect glass
The thinned efficiency and quality of glass.Therefore a large amount of fluorine-containing spent acid will be generated in thinning process.
The fluohydric acid content of these fluorine-containing spent acid generally in 2~105%wt, the content of other inorganic acids generally 5~
25%wt, the fluosilicic acid content that thinning process generates is generally in 5~35%wt.Since fluorine-containing spent acid belongs to danger wastes, root
According to the current law of China, danger wastes need qualified unit to carry out special treatment, or produce useless unit in oneself work
In-situ processing is carried out in factory, makes general waste.Glass thinning enterprise generally entrusts the list with dangerous waste processing qualification
Position carries out harmless treatment, and processing cost reaches 4500~7500 yuan/ton；Ye You glass thinning enterprise is by fluorine-containing spent acid and produces
Harmless treatment is carried out with lime after waste water mixing in the process, processing cost also reaches 2000 yuan/ton or so.No matter use
Fluorine-containing material in fluorine-containing spent acid is changed into calcium fluoride sludge by which kind of processing mode；This method wastes fluorine in short supply
Resource, while a large amount of lime is also wasted, also burden is brought to environmental improvement.Energy-saving, development low-carbon warp is advocated in the whole world
The epoch of Ji explore the common recognition that new production technology and technique have become insider.If using advanced technology and technique,
These fluorine utilizations of resources are got up, the fluorine product produced high added value, have the market demand can not only be greatly lowered fluorine-containing
Waste acid treatment cost, the national policy for also meeting very much comprehensive utilization of resources and developing a circular economy.So how to integrate circulation
The technology for recycling fluorine-containing spent acid increasingly draws attention.
CN105753211A, discloses in a kind of solar battery sheet or glass thinning production spent acid fluorine recovery method and is
System utilizes sylvite or sodium salt, recycles potassium fluosilicate or sodium fluorosilicate product.Sodium salt used by the technology and sylvite and spent acid
In fluosilicic acid reaction when produce new acid pickle, in second step will consumption calcium salt or calcium hydroxide, make increased costs；Such as
Fruit is producing spent acid factory treatment in situ, since these factories are all without sale prodan or potassium fluosilicate qualification, the fluorine of output
Sodium metasilicate or potassium fluosilicate still become dangerous waste product；If outward transport is handled, most of processing enterprises for having qualification can only be according to
Innoxious processing mode processing, still cannot sell prodan or potassium fluosilicate product.Therefore, the patented technology not only at
A possibility that this is higher, and since qualification limits, practical application is smaller.
Application publication number: 107540234 A of CN, denomination of invention: a kind of glass thinning system is discharged without spent acid without glass dregs
Method, comprising: the acid pickle after glass thinning is reacted with potassium hydroxide solution；It is separated by solid-liquid separation, is precipitated and filtrate；It will
Above-mentioned filtrate is configured to the mix acid liquor that HF content is 10~25%wt, HCl content is 5~15%wt, reuse；By above-mentioned solid
It is reacted with calcium salt soln and/or calcium hydroxide suspension；Coagulant and/or flocculant are added after the reaction was completed, makes in liquid phase
Precipitation of solid material, using separation of solid and liquid.In the invention processing method, spent acid is recycled, save the cost, is reduced useless
The discharge of object is conducive to environmental protection, realizes recycling for spent acid, is also convenient for automation continuous operation.It does not need individually
Spent acid is handled, the processing cost of dangerous waste object is greatly reduced.But coagulant and/or flocculation is added in method after the reaction was completed
Agent makes the precipitation of solid material in liquid phase, using obtained after separation of solid and liquid can sewage effluent and sludge, have certain danger to environment
Evil does not reach no waste discharge, and whole not high to the recovery utilization rate of resource.
Utility model content
The utility model provides a kind of method and system that efficient resource is recycled from glass thinning acid pickle, solves
The problems such as there are waste discharge and insufficient resource recyclings in existing glass thinning spent acid liquor treating process.
In order to solve the above technical problems, the technical solution adopted by the utility model is:
A kind of system recycling efficient resource from glass thinning acid pickle, comprising:
First processing module, including sequentially connected first reaction kettle, potassium fluosilicate solid-liquid separating machine, filter, it is described
First reaction kettle includes that glass thinning acid pickle input port and potassium chloride add mouth；The potassium fluosilicate solid-liquid separating machine is logical
Pipeline is crossed to be connected with the discharge port of first reaction kettle, through the potassium fluosilicate solid-liquid separating machine separation after solids into
Enter next processing module, the liquid after potassium fluosilicate solid-liquid separating machine separation enters the filter and sufficiently filtered
Enter in thinning acid solution dosage bunker afterwards so that production line is stand-by；
Second processing module, including sequentially connected second reaction kettle, silica seperator and silica washing
Slot, second reaction kettle include that potassium fluosilicate input port and potassium hydroxide add mouth；The potassium fluosilicate input port to
The solids after potassium fluosilicate solid-liquid separating machine separation is put into, the silica seperator passes through pipeline and described the
The discharge port of two reaction kettles is connected, and the silica sink is connected with silica seperator；Through the titanium dioxide
Solids after the separation of silicon seperator enters the silica sink and starts the cleaning processing, and it is solid to obtain pure silica
Body；Liquid after silica seperator separation enters next processing module；
Third processing module, including sequentially connected concentration kettle and potassium fluoride dryer, the concentration kettle and described two
Silica seperator is connected, and the liquid after the silica seperator separation enters the concentration kettle and carries out concentration, dense
After potassium fluoride crystalline solid after contracting is dried into the potassium fluoride dryer, potassium fluoride product is obtained.
As a preferred technical solution, further include:
Fourth processing module, including sequentially connected third reaction kettle, distillation still, crystallization kettle, potassium sulfate solid-liquid separating machine,
And potassium sulfate dryer, the third reaction kettle are connected with the discharge port of concentration kettle, the third reaction kettle further includes sulphur
Acid adds mouth, and the distillation still is connected with condenser, and the hydrogen fluoride gas that the distillation still distills is cold through the condenser
The hydrogen fluoride liquid obtained after solidifying enters in thinning acid solution dosage bunker so that production line is stand-by.
The silica sink includes at least three layers of sink as a preferred technical solution, by repeatedly to two
The carrying out washing treatment of silica, to guarantee the pure of silica.
The discharge port of the concentration kettle is connected with first reaction kettle as a preferred technical solution, to realize fluorine
Change the recycling of potassium.
The specific processing method of this system, comprising:
Step 1: being added potassium fluoride solution in acid pickle, and the fluosilicic acid in the acid pickle and fluorination nak response generate
Potassium fluosilicate and hydrofluoric acid；
Step 2: the material after step 1 is reacted is separated by solid-liquid separation, and it is mixed less than 0.1-1% to obtain fluosilicic acid content
Acid is closed, while obtaining potassium fluosilicate solids；The mix acid liquor returns to primary producing line as recycling acid solution；
Step 3: potassium hydroxide solution reaction is added in potassium fluosilicate solids and generates silica solid and potassium fluoride
Solution；
Step 4: the material after step 3 is reacted is separated by solid-liquid separation, and obtains potassium fluoride solution and silica solid
Object cleans silica solid object, obtains silica product, cleaning solution is mixed to get potassium fluoride with potassium fluoride solution and mixes
Liquid；
Step 5: heating concentration potassium fluoride mixed liquor reaches a certain concentration rear portion and returns to step 1, and remainder is dry
Constipation crystalline substance is as potassium fluoride product.
The method as a preferred technical solution, further include:
Sulfuric acid: being added remaining potassium fluoride mixed liquor in step 5, produce hydrofluoric acid and potassium sulfate mixed liquor by step 6,
Hydrofluoric acid and potassium sulfate mixed liquor are heated to 60~130 DEG C, the evolution of hydrofluoric acid vapor obtains liquid HF acid after condensation, can
It is mixed with the recycling acid solution of step 2, returns to primary producing line；Potassium sulfate solution is obtained simultaneously；
Step 7: continuing to heat concentrated vitriol potassium solution and crystallize is potassium sulfate crystal；Dry potassium sulfate crystal, obtains sulphur
Sour potassium product.
The reaction temperature of the step 1 is controlled at 10~90 DEG C as a preferred technical solution,；Pressure control 0.1~
0.3MPa。
Fluosilicic acid molar ratio is 2 in the potassium fluoride and acid pickle being added in the step 1 as a preferred technical solution:
1。
The molar ratio of the potassium hydroxide and potassium fluosilicate that are added in the step 3 as a preferred technical solution, is 4:1.
The temperature of the step 3 is controlled in room temperature~90 DEG C as a preferred technical solution,；Pressure is normal pressure.
The reaction temperature of the step 6 is controlled in room temperature~120 DEG C as a preferred technical solution,；Pressure be normal pressure~
0.3MPa。
The cleaning silica solid object is that a point level Four is washed as a preferred technical solution, is first washed with third
Tank liquor cleaning product in slot, cleaning solution and potassium fluoride solution are mixed to get potassium fluoride mixed liquor；Again in the second sink
Tank liquor cleaning product, cleaning solution are squeezed into third sink, and then with the tank liquor cleaning product in the first sink, cleaning solution is beaten
Enter in the second sink, finally use clear water cleaning product, cleaning solution squeezes into the first sink.In the acid pickle of the utility model extremely
Less containing hydrofluoric acid (2~15%wt) and fluosilicic acid (5~35%wt) and hydrochloric acid (or sulfuric acid or nitric acid) (5~25%wt)
The utility model has the beneficial effects that
1, fluosilicic acid is removed with potassium fluoride, increases the rate of recovery of hydrofluoric acid.
2, potassium fluosilicate is hydrolyzed with potassium hydroxide, is converted into potassium fluoride and silica, fluorine resource all obtains effective benefit
With.
3, the hydrochloric acid or sulfuric acid or nitric acid etc. contained in former spent acid, is all recycled in step 2.
4, spent acid realizes zero-emission, and harmless treatment that it goes without doing, cost is greatly reduced.
5, spent acid does not do harmless treatment, without mud discharging.
6, potassium hydroxide, sulfuric acid can be waste materials, all use waste material in full process stream journey, and produce industrial production
Product greatly improve the utilization rate of waste resource.
Detailed description of the invention
In order to illustrate more clearly of the technical solution of the utility model, letter will be made to attached drawing needed in the embodiment
Singly introduce.
Fig. 1 is the structural block diagram of one embodiment of the utility model；
Fig. 2 is the structural block diagram of another embodiment of the utility model.
Specific embodiment
Below in conjunction with the utility model attached drawing, the technical solution of the utility model is clearly and completely described, is shown
So, described content is only the utility model one embodiment, instead of all the embodiments.Based in the utility model
Embodiment, every other embodiment obtained by those of ordinary skill in the art without making creative efforts,
It fall within the protection scope of the utility model.
Embodiment 1
As shown in Figure 1, a kind of system that efficient resource is recycled from glass thinning acid pickle, including following module: first
Processing module S1, including sequentially connected first reaction kettle 11, potassium fluosilicate solid-liquid separating machine 12, filter 13, the first reaction
Kettle 11 includes that glass thinning acid pickle input port 14 and potassium chloride add mouth 15；Potassium fluosilicate solid-liquid separating machine 12 passes through pipe
Road is connected with the discharge port of the first reaction kettle 11, and the solids after the separation of potassium fluosilicate solid-liquid separating machine 12 enters next place
Module is managed, the liquid after the separation of potassium fluosilicate solid-liquid separating machine 12 enters after filter 13 carries out sufficiently filtering and enters thinning acid
So that production line is stand-by in liquid dosage bunker 99；
Second processing module S2, including sequentially connected second reaction kettle 21, silica seperator 22 and titanium dioxide
Silicon sink 23, the second reaction kettle 21 include that potassium fluosilicate input port 24 and potassium hydroxide add mouth 25；Potassium fluosilicate investment
Mouthfuls 24 to put into the solids after the separation of potassium fluosilicate solid-liquid separating machine 12, and silica seperator 22 passes through pipeline and the
The discharge port of two reaction kettles 21 is connected, and silica sink 23 is connected with silica seperator 22；Through silica
Solids after the separation of seperator 22 enters silica sink 23 and starts the cleaning processing, and silica sink 23 includes extremely
Few three layers of sink, by repeatedly to the carrying out washing treatment of silica, to guarantee the pure of silica.It is separated through silica
Liquid after machine 22 separates enters next processing module；
Third processing module S3, including sequentially connected concentration kettle 31 and potassium fluoride dryer 32, concentration kettle 31 and two
Silica seperator 22 is connected, and the liquid after silica seperator 22 separates enters the concentration kettle 31 progress concentration,
Potassium fluoride crystalline solid after concentration enters after potassium fluoride dryer 32 dried, and obtains potassium fluoride product, the discharging of concentration kettle 31
Mouth is connected with the first reaction kettle 11, to realize the recycling of potassium fluoride.
The method that the present apparatus specifically recycles efficient resource from glass thinning acid pickle, comprising:
Step 1: acid pickle and potassium fluoride solution are added in the first reaction kettle；Fluosilicic acid and fluorine in the acid pickle
Change nak response, generate potassium fluosilicate and hydrofluoric acid, reaction temperature is controlled at 10~90 DEG C；Pressure controls 0.1~0.3MPa, fluorination
Fluosilicic acid molar ratio is 2:1 in potassium and waste liquid；
Step 2: the material after reaction is separated by solid-liquid separation by potassium fluosilicate solid-liquid separating machine, and the liquid after separation exists
Secondary filter is carried out by filter, obtains the mix acid liquor and potassium fluosilicate solids of fluosilicic acid content 0.1-1%；It is described mixed
Conjunction acid solution, which matches to postpone by thinning acid solution make-up tank, returns to primary producing line as recycling acid solution；
Step 3: being added potassium fluosilicate solids in the second reaction kettle and potassium hydroxide solution reaction generates silica
Solid and potassium fluoride solution, be added potassium hydroxide and potassium fluosilicate and molar ratio be 4:1, temperature is controlled in room temperature~90 DEG C；
Pressure is normal pressure；
Step 4: the material after reaction is separated by solid-liquid separation by silica seperator, obtains potassium fluoride solution, two
Silica solids object, silica solid object are cleaned by silica sink, obtain silica product, cleaning solution
Potassium fluoride mixed liquor is mixed to get with potassium fluoride solution；
Step 5: potassium fluoride concentration kettle heat concentration potassium fluoride mixed liquor, then pass sequentially through potassium fluoride concentration kettle and
Potassium fluoride dryer condensing crystallizing and drying obtain potassium fluoride product.
Cleaning silica solid object is that a point level Four is washed, and first with the cleaning solution cleaning product in third sink slot, is washed
It washs liquid and potassium fluoride solution is mixed to get potassium fluoride mixed liquor；Cleaning solution uses the cleaning solution cleaning product in the second sink again,
Cleaning solution is squeezed into third sink slot, and then with the cleaning solution cleaning product in the first sink, cleaning solution is squeezed into second and washed
It washs in slot slot, finally uses clear water cleaning product, cleaning solution squeezes into the first sink.
Spent acid the liquid mixture wherein hydrofluoric acid 4.7%, fluosilicic acid 9.6%, hydrochloric acid of certain glass thinning workshop discharge
14.2%, potassium fluoride purity used is 99%, potassium hydroxide solution concentration is 40%.Potassium hydroxide solution is glass thinning technique
Spent lye in process, sulfuric acid used are industrial waste sulfuric acid.
Specific experiment: taking 500kg spent acid liquid mixture with after the fully reacting of 39kg potassium fluoride, (reaction temperature is room temperature, pressure
Power is 0.1MPa), it is separated by solid-liquid separation (equipment used is plate and frame filter press), obtained mix acid liquor 466kg, sediment
73kg, fluosilicic acid content 0.5% in mix acid liquor.
The hydrofluoric acid solution of 65%wt and the hydrochloric acid solution of 36%wt are added in mix acid liquor, being configured to HF content is
25%wt, HCl content are the mix acid liquor that 15%wt, H2SiF6 content are 0.5%wt, and the mix acid liquor is by heat exchange, temperature
Control is at 40~55 DEG C；Mix acid liquor is back to use glass thinning system later, be used for glass thinning, be thinned rate be 18 microns/
Minute, product reaches requirement.
Sediment is added in 186KG potassium hydroxide solution and is reacted, reaction condition is normal temperature and pressure, to its fully reacting
After be separated by solid-liquid separation, obtain sediment 33.3KG and separating liquid 225.7KG.Titanium dioxide will be obtained after sediment undergoes washing, drying
Silicon 20KG.Separating liquid heating is concentrated to get potassium fluoride product 115.4KG.Potassium fluoride not reuse in the present embodiment, but it is complete
Portion becomes potassium fluoride product.Concentration of the general reuse in 35-50%).
Embodiment 2
As shown in Fig. 2, a kind of system that efficient resource is recycled from glass thinning acid pickle, including following module: first
Processing module S1, including sequentially connected first reaction kettle 11, potassium fluosilicate solid-liquid separating machine 12, filter 13, the first reaction
Kettle 11 includes that glass thinning acid pickle input port 14 and potassium chloride add mouth 15；Potassium fluosilicate solid-liquid separating machine 12 passes through pipe
Road is connected with the discharge port of the first reaction kettle 11, and the solids after the separation of potassium fluosilicate solid-liquid separating machine 12 enters next place
Module is managed, the liquid after the separation of potassium fluosilicate solid-liquid separating machine 12 enters after filter 13 carries out sufficiently filtering and enters thinning acid
So that production line is stand-by in liquid dosage bunker 99；
Second processing module S2, including sequentially connected second reaction kettle 21, silica seperator 22 and titanium dioxide
Silicon sink 23, the second reaction kettle 21 include that potassium fluosilicate input port 24 and potassium hydroxide add mouth 25；Potassium fluosilicate investment
Mouthfuls 24 to put into the solids after the separation of potassium fluosilicate solid-liquid separating machine 12, and silica seperator 22 passes through pipeline and the
The discharge port of two reaction kettles 21 is connected, and silica sink 23 is connected with silica seperator 22；Through silica
Solids after the separation of seperator 22 enters silica sink 23 and starts the cleaning processing, and silica sink 23 includes extremely
Few three layers of sink, by repeatedly to the carrying out washing treatment of silica, to guarantee the pure of silica.It is separated through silica
Liquid after machine 22 separates enters next processing module；
Third processing module S3, including sequentially connected concentration kettle 31 and potassium fluoride dryer 32, concentration kettle 31 and two
Silica seperator 22 is connected, and the liquid after silica seperator 22 separates enters the concentration kettle 31 progress concentration,
Potassium fluoride crystalline solid after concentration enters after potassium fluoride dryer 32 dried, and obtains potassium fluoride product, the discharging of concentration kettle 31
Mouth is connected with the first reaction kettle 11, to realize the recycling of potassium fluoride.
Fourth processing module S4, including sequentially connected third reaction kettle 41, distillation still 42, crystallization kettle 43, potassium sulfate are solid
Liquid separator 44 and potassium sulfate dryer 45, third reaction kettle 41 are connected with the discharge port of concentration kettle 31, third reaction kettle
41 further include that sulfuric acid adds mouth 46, and distillation still 42 is connected with condenser 47, and the hydrogen fluoride gas that distillation still 42 distills is through cold
The hydrogen fluoride liquid that condenser 47 obtains after condensing enters in thinning acid solution dosage bunker 99 so that production line is stand-by.
The method that the present apparatus specifically recycles efficient resource from glass thinning acid pickle, comprising:
Step 1: acid pickle and potassium fluoride solution are added in the first reaction kettle；Fluosilicic acid and fluorine in the acid pickle
Change nak response, generate potassium fluosilicate and hydrofluoric acid, reaction temperature is controlled at 10~90 DEG C；Pressure controls 0.1~0.3MPa, fluorination
Fluosilicic acid molar ratio is 2:1 in potassium and waste liquid；
Step 2: the material after reaction is separated by solid-liquid separation by potassium fluosilicate solid-liquid separating machine, and the liquid after separation exists
Secondary filter is carried out by filter, obtains the mix acid liquor and potassium fluosilicate solids of fluosilicic acid content 0.1-1%；It is described mixed
Conjunction acid solution, which matches to postpone by thinning acid solution make-up tank, returns to primary producing line as recycling acid solution；
Step 3: being added potassium fluosilicate solids in the second reaction kettle and potassium hydroxide solution reaction generates silica
Solid and potassium fluoride solution, be added potassium hydroxide and potassium fluosilicate and molar ratio be 4:1, temperature is controlled in room temperature~90 DEG C；
Pressure is normal pressure；
Step 4: the material after reaction is separated by solid-liquid separation by silica seperator, obtains potassium fluoride solution, two
Silica solids object, silica solid object are cleaned by silica sink, obtain silica product, cleaning solution
Potassium fluoride mixed liquor is mixed to get with potassium fluoride solution；
Step 5: concentration potassium fluoride mixed liquor is heated in potassium fluoride concentration kettle, reaches a certain concentration rear portion and returns to step
In rapid one；
Step 6: remaining potassium fluoride mixed liquor is added to third reaction kettle in step 5, and sulfuric acid is then added, and produces hydrogen
Fluoric acid and potassium sulfate mixed liquor, heat hydrofluoric acid and potassium sulfate mixed liquor to 60~130 DEG C in hydrofluoric acid distillation still, hydrofluoric acid
Vapor evolution, hydrofluoric acid vapor obtain liquid HF acid after condensing by hydrofluoric acid condenser, can be with the recycling of step 2
Acid solution mixing, returns to primary producing line, obtains potassium sulfate solution, answers temperature control in room temperature~120 DEG C；Pressure be normal pressure~
0.3MPa；
Step 7: continue to heat potassium sulfate solution crystallization in potassium sulfate crystallization kettle to be potassium sulfate crystal, pass through potassium sulfate
The isolated potassium sulfate crystal of solid-liquid separating machine；Then by obtaining potassium sulfate according to potassium sulfate drier potassium sulfate crystal
Product.
Cleaning silica solid object is that a point level Four is washed, and first with the cleaning solution cleaning product in third sink slot, is washed
It washs liquid and potassium fluoride solution is mixed to get potassium fluoride mixed liquor；Cleaning solution uses the cleaning solution cleaning product in the second sink again,
Cleaning solution is squeezed into third sink slot, and then with the cleaning solution cleaning product in the first sink, cleaning solution is squeezed into second and washed
It washs in slot slot, finally uses clear water cleaning product, cleaning solution squeezes into the first sink.
Spent acid the liquid mixture wherein hydrofluoric acid 4.7%, fluosilicic acid 9.6%, hydrochloric acid of certain glass thinning workshop discharge
14.2%, potassium fluoride purity used is 99%, potassium hydroxide solution concentration is 40%.Potassium hydroxide solution is glass thinning technique
Spent lye in process, sulfuric acid used are industrial waste sulfuric acid.
Specific experiment: taking 500kg spent acid liquid mixture with after the fully reacting of 39kg potassium fluoride, (reaction temperature is room temperature, pressure
Power is 0.1MPa), it is separated by solid-liquid separation (equipment used is plate and frame filter press), obtained mix acid liquor 466kg, sediment
73kg。
Fluosilicic acid content 0.4% in mix acid liquor.The hydrofluoric acid solution and 36%wt of 65%wt are added in mix acid liquor
Hydrochloric acid solution, it is the mixed acid that 15%wt, H2SiF6 content are 0.5%wt that be configured to HF content, which be 25%wt, HCl content,
Liquid, the mix acid liquor are controlled by heat exchange, temperature at 40~55 DEG C；Mix acid liquor is back to use glass thinning system later, is used for
Glass thinning, it is 18 [mus that rate, which is thinned, and product reaches requirement.
Sediment is added in 186KG potassium hydroxide solution and is reacted, reaction condition is normal temperature and pressure, to its fully reacting
After be separated by solid-liquid separation, obtain sediment 33.3KG and separating liquid 225.7KG.Titanium dioxide will be obtained after sediment undergoes washing, drying
Silicon 20KG.Separating liquid heating is concentrated to get 40% potassium fluoride solution, reflux 97.5kg40% potassium fluoride solution to the first step is used
In progress next group acid pickle processing.Concentration of the general reuse in 35-50%.
Then sulfuric acid 64.5kg is added in remaining potassium fluoride solution (sulfuric acid concentration is made into concentration with 98 acid and 105 acid-mixeds and approaches
100% sulfuric acid), hydrofluoric acid and potassium sulfate mixed liquor are produced, hydrofluoric acid and potassium sulfate mixing are heated in hydrofluoric acid distillation still
For liquid to 100 DEG C, hydrofluoric acid vapor evolution, hydrofluoric acid vapor obtains 26.3kg hydrofluoric acid after condensing by hydrofluoric acid condenser
Liquid mixes with the recycling acid solution of step 2, returns to primary producing line, obtain potassium sulfate solution, answers temperature control at 100 DEG C；Pressure
Power is 0.3MPa；
Continue to heat potassium sulfate solution crystallization in potassium sulfate crystallization kettle to be potassium sulfate crystal, be separated by solid-liquid separation by potassium sulfate
The isolated potassium sulfate crystal of machine；Then by obtaining the production of 114.8kg potassium sulfate according to potassium sulfate drier potassium sulfate crystal
Product.
The above is only the preferred embodiment of the utility model only, is not intended to limit the utility model, all at this
Within the spirit and principle of utility model, any modification, equivalent replacement, improvement and so on should be included in the utility model
Protection scope within.
Claims (4)
1. a kind of system for recycling efficient resource from glass thinning acid pickle, it is characterised in that: include:
First processing module, including sequentially connected first reaction kettle, potassium fluosilicate solid-liquid separating machine, filter, described first
Reaction kettle includes that glass thinning acid pickle input port and potassium chloride add mouth；The potassium fluosilicate solid-liquid separating machine passes through pipe
Road is connected with the discharge port of first reaction kettle, under the solids after potassium fluosilicate solid-liquid separating machine separation enters
One processing module, the liquid after potassium fluosilicate solid-liquid separating machine separation enter after the filter is filtered into thin
Change in acid solution dosage bunker so that production line is stand-by；
Second processing module, including sequentially connected second reaction kettle, silica seperator and silica sink,
Second reaction kettle includes that potassium fluosilicate input port and potassium hydroxide add mouth；The potassium fluosilicate input port is to put into
Solids after potassium fluosilicate solid-liquid separating machine separation, the silica seperator are anti-with described second by pipeline
The discharge port of kettle is answered to be connected, the silica sink is connected with silica seperator；Through the silica point
The solids after separating of disembarking enters the silica sink and starts the cleaning processing；It is separated through the silica seperator
Liquid afterwards enters next processing module；
Third processing module, including sequentially connected concentration kettle and potassium fluoride dryer, the concentration kettle and the titanium dioxide
Silicon seperator is connected, and the liquid after the silica seperator separation enters the concentration kettle and carries out concentration, after concentration
Potassium fluoride crystalline solid enter the potassium fluoride dryer dried.
2. a kind of system for recycling efficient resource from glass thinning acid pickle according to claim 1, it is characterised in that:
Further include:
Fourth processing module, including sequentially connected third reaction kettle, distillation still, crystallization kettle, potassium sulfate solid-liquid separating machine and
Potassium sulfate dryer, the third reaction kettle are connected with the discharge port of concentration kettle, and the third reaction kettle further includes that sulfuric acid is thrown
Add mouth, the distillation still is connected with condenser.
3. a kind of system for recycling efficient resource from glass thinning acid pickle according to claim 1, which is characterized in that
The silica sink includes at least three layers of sink.
4. a kind of system for recycling efficient resource from glass thinning acid pickle according to claim 1, which is characterized in that
The discharge port of the concentration kettle is connected with first reaction kettle.
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| CN201821496616.2U CN208995272U (en) | 2018-09-13 | 2018-09-13 | A kind of system recycling efficient resource from glass thinning acid pickle |
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