CN108569812A - A kind of processing system and processing method of the waste water containing low-concentration sulfuric acid - Google Patents
A kind of processing system and processing method of the waste water containing low-concentration sulfuric acid Download PDFInfo
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- CN108569812A CN108569812A CN201810409644.4A CN201810409644A CN108569812A CN 108569812 A CN108569812 A CN 108569812A CN 201810409644 A CN201810409644 A CN 201810409644A CN 108569812 A CN108569812 A CN 108569812A
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- waste water
- sulfuric acid
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- ammonium
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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
- C02F9/00—Multistage treatment of water, waste water or sewage
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01C—AMMONIA; CYANOGEN; COMPOUNDS THEREOF
- C01C1/00—Ammonia; Compounds thereof
- C01C1/24—Sulfates of ammonium
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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
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
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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
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
- C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
Abstract
The invention discloses a kind of processing systems of waste water containing low-concentration sulfuric acid comprising collecting pit, neutralization bucket, the first filter press, sewage disposal system, the first conveyer belt, beater tub, fluid reservoir, metathesis reaction bucket, the second filter press, decrease temperature crystalline device and centrifuge.Advantageous effect：Processing system of the present invention is simple in structure, easily realizes；The evaporation and concentration by evaporator is avoided, reduces the cost for generating ammonium sulfate, and suitable for the processing of any concentration sulphuric acid waste water；Low energy consumption simultaneously, and method is simple, and treatment effeciency is high；Production method environmental protection；By the retrieval of sulfuric acid in waste water, the sulfuric acid in waste water is made to be separated, carrying out biochemical treatment for waste water creates advantageous condition.
Description
Technical field：
Patent of the present invention belongs to industry environmental protection field, and in particular to a kind of processing system of the waste water containing low-concentration sulfuric acid and place
Reason method.
Background technology：
Sulfuric acid is widely used in the industries such as chemical industry, steel, and in many production processes, the utilization rate of sulfuric acid is low,
A large amount of sulfuric acid is discharged away in company with waste water；These waste water are such as discharged into environment without processing, can not only make water body
Or soil acidification, it causes damages to ecological environment, and waste a large amount of sulfuric acid resource；The improvement side used both at home and abroad at present
Method is broadly divided into 3 major class：Recycling, comprehensive utilization, neutralisation treatment；It needs according to the dense of Waste Sulfuric Acid or sulfur acid waste water
Degree, impurities composition come select recycling or processing method；The Waste Sulfuric Acid or sulphur generated especially for Fine Chemical
For sour waste water, since contained organic impurities ingredient is extremely complex, the concentration of sulfuric acid changes very greatly, when sulfuric acid concentration is higher
When, it can recycle after processing；When sulfuric acid concentration is relatively low, water is larger, since the value of recycling sulfuric acid is not high, it is also difficult to
It is comprehensively utilized, is neutralized using lime or salkali waste, reach discharge standard or be conducive to subsequent processing, because
This has the following problems：1, the sulfuric acid of low concentration, which can not recycle, can not also comprehensively utilize, and cause the waste of sulfuric acid, and
When handling the waste water containing sulfuric acid, due to the presence of sulfuric acid, biochemical treatment can not be carried out to waste water；2, it is integrated in sulfuric acid wastewater containing
Use aspects, current method mainly using in ammonia and Waste Sulfuric Acid extracting sulfuric acid ammonium fertilizer, obtain low concentration ammonium sulfate it
After need by evaporator condensing crystallizing formed solid ammonium sulfate, in the process, in ammonium sulfate concentrations are low and waste water
Contained large amount of organic affects the stable operation of evaporator the problems such as causing evaporator high energy consumption, easily block, raw simultaneously
Produce the of high cost of ammonium sulfate.
Invention content：
First of the present invention is designed to provide a kind of simple in structure, processing for the waste water containing low-concentration sulfuric acid easily realized
System.
Second object of the present invention is to provide a kind of sulphur containing low concentration being suitable for handling any concentration sulphuric acid waste water
The processing method of sour waste water.
First purpose of the present invention is implemented by following technical solution：A kind of processing system of the waste water containing low-concentration sulfuric acid,
It includes that collecting pit, neutralization bucket, the first filter press, sewage disposal system, the first conveyer belt, beater tub, fluid reservoir, double decomposition are anti-
Ying Tong, the second filter press, decrease temperature crystalline device and centrifuge；The liquid outlet of the collecting pit and the inlet of the neutralization bucket pass through
Pipeline connection setting；Calcium carbonate feed inlet and gas outlet are respectively arranged on the neutralization bucket；The liquid outlet of the neutralization bucket
It is connected to by pipeline with the inlet of first filter press；The liquid outlet of first filter press and the sewage disposal system
It is connected to by pipeline；The discharge port of first filter press is connected with the feed inlet of the beater tub by first conveyer belt
It connects；The inlet of the beater tub is connected to the liquid outlet of the fluid reservoir by pipeline；The liquid outlet of the beater tub and institute
The inlet for stating metathesis reaction bucket is connected to by pipeline；It is provided with ammonium carbonate inlet on the metathesis reaction bucket；Institute
The liquid outlet for stating metathesis reaction bucket is connected to the inlet of second filter press by pipeline；Second filter press goes out
Liquid mouth is connected to the inlet of the decrease temperature crystalline device by pipeline；The liquid outlet of the decrease temperature crystalline device and the centrifuge
Inlet is connected to by pipeline.
Further, further include carbonators, ammonium hydroxide source and ammonium carbonate holding vessel；The gas outlet and the carbonators
Air inlet is connected to by pipeline；The inlet of the carbonators is connected to the ammonium hydroxide source by pipeline；The carbonators goes out
Liquid mouth is connected to the inlet of the ammonium carbonate holding vessel by pipeline；The liquid outlet of the ammonium carbonate holding vessel and the carbonic acid
Ammonium inlet is connected to by pipeline.
Further, further include vapour source；The air intake of the vapour source and the metathesis reaction bucket passes through pipeline
Connection
Further, further include calcium carbonate holding vessel and the second conveyer belt；The discharge port of second filter press and institute
State the feed inlet connection setting of calcium carbonate holding vessel；The discharge port of the calcium carbonate holding vessel passes through with the calcium carbonate feed inlet
The second transmission band connection.
Further, the liquid outlet of the centrifuge is connected to the inlet of the fluid reservoir by pipeline.
Further, further include activated carbon decolorizing tower；The liquid outlet of the collecting pit and the activated carbon decolorizing tower
Inlet is connected to；The liquid outlet of the activated carbon decolorizing tower is connected to the inlet of the neutralization bucket by pipeline.
Second object of the present invention is implemented by following technical solution：A kind of processing method of the waste water containing low-concentration sulfuric acid,
Include the following steps：(1) neutralization reaction；(2) first time press filtration；(3) it is beaten；(4) metathesis reaction；(5) second of press filtration；
(6) crystallization filtering；Wherein：
(1) neutralization reaction：By in sulfur acid waste water pump to neutralization bucket, calcium carbonate, carbon are then added into the neutralization bucket
Sour calcium generates calcium sulfate emulsion and carbon dioxide gas with the sulfuric acid reaction in waste water, and calcium carbonate is 1 with sulfuric acid mass ratio:1-
2:1；
(2) first time press filtration：Press filtration will be carried out in calcium sulfate milkiness liquid pump to the first filter press, obtains calcium sulfate filter cake,
And filtered waste water is transported to sewage disposal system and is further processed；
(3) it is beaten：Calcium sulfate filter cake is transported to by the first conveyer belt in beater tub, 2- is beaten after adding mashing water
3h, forms calcium sulfate slurries, and mashing water is 0.5 with calcium sulfate filter cake mass ratio:1-1:1, the solid content in calcium sulfate filter cake
It is 70%；
(4) metathesis reaction：By in calcium sulfate slurry liquid pump to metathesis reaction bucket, and into the metathesis reaction bucket
Ammonium carbonate is added, so that calcium sulfate is carried out metathesis reaction with ammonium carbonate and ammonium sulfate saturated solution and calcium carbonate emulsion, carbon is made
Sour ammonium and calcium sulfate mass ratio are 0.7:1-1.2:1；
(5) second of press filtration：Press filtration will be carried out in product pump to the second filter press after metathesis reaction；Obtain carbon
Sour calcium filter cake and ammonium sulfate saturated solution；
(6) crystallization filtering：Obtained ammonium sulfate saturated solution is transported to crystallize in decrease temperature crystalline device and is precipitated, it is then defeated
It send into centrifuge and carries out centrifugal filtration, the separation of solid and liquid until completing ammonium sulfate obtains ammonium sulfate solids.
Further, in step 1 with reaction before further include decolorization process, the waste water in collecting pit is transported to activity
It decolourizes in carbon decoloring tower, forms colourless waste water, then colourless waste water is delivered in the neutralization bucket in step 1 and is carried out
Neutralization reaction is handled.
Further, the carbon dioxide gas generated in step 1 is transported in carbonators, with the ammonia come from ammonium hydroxide source
Water reaction generates sal volatile, and carbon dioxide and ammonium hydroxide mass ratio are 1:2-1:4, the mass percent of ammonia is in ammonium hydroxide
28%；The sal volatile of generation is transported in ammonium carbonate holding vessel and is stored, the carbonic acid in the ammonium carbonate holding vessel
Ammonium salt solution is periodically transported in the metathesis reaction bucket in step 4 and carries out metathesis reaction.
Further, the steam of vapour source, which is passed through in the metathesis reaction bucket in step 4, carrys out heat temperature raising, control temperature
Degree reacts 2h at 40 DEG C -60 DEG C, and then it is further heated up to 70 DEG C -90 DEG C, reaction 1h is to the reaction was complete.
Further, the calcium carbonate filter cake obtained in step 5 is transported in calcium carbonate holding vessel and is stored, the carbon
Calcium carbonate in sour calcium holding vessel, which is periodically delivered to by the second conveyer belt in the neutralization bucket in step 1, neutralize instead
It answers.
Further, the filtered raffinate of centrifuge described in step 6 is transported in fluid reservoir and is stored, the fluid reservoir
It is beaten in the beater tub that interior liquid is periodically pumped into step 3 as mashing with water.
Advantages of the present invention：1, processing system of the present invention is simple in structure, easily realizes；2, the present invention in neutralization bucket by sending out
Raw neutralization reaction produces calcium sulphate solid, then generates ammonium sulfate by metathesis reaction, by decrease temperature crystalline and is centrifuging
Filter is made ammonium sulfate, mainly consumes ammonium hydroxide, avoid the step of being concentrated by evaporation using evaporator, is reduced and is generated ammonium sulfate
Cost, and suitable for the processing of any concentration sulphuric acid waste water；Low energy consumption simultaneously, and method is simple, and treatment effeciency is high, and avoids
The problem of evaporator blocks；3, during producing ammonium sulfate, generated calcium carbonate and filtered raffinate can weigh
It is multiple to be used, new pollutant, production method environmental protection are not generated；4, the retrieval of sulfuric acid in waste water can be made to give up by the present invention
Sulfuric acid in water is separated, and carrying out biochemical treatment for waste water creates advantageous condition.
Description of the drawings：
Fig. 1 is the overall structure diagram of the embodiment of the present invention.
Collecting pit 1, neutralization bucket 2, calcium carbonate feed inlet 2.1, gas outlet 2.2, the first filter press 3, sewage disposal system 4,
First conveyer belt 5, beater tub 6, fluid reservoir 7, metathesis reaction bucket 8, ammonium carbonate inlet 8.1, the second filter press 9, cooling knot
Brilliant device 10, centrifuge 11, carbonators 12, ammonium hydroxide source 13, ammonium carbonate holding vessel 14, calcium carbonate holding vessel 15, the second conveyer belt 16,
Activated carbon decolorizing tower 17, vapour source 18.
Specific implementation mode：
Below in conjunction with attached drawing, by embodiment, the present invention is described in further detail.
Embodiment 1：As shown in Figure 1, a kind of processing system of waste water containing low-concentration sulfuric acid comprising collecting pit 1, neutralization bucket
2, the first filter press 3, sewage disposal system 4, the first conveyer belt 5, beater tub 6, fluid reservoir 7, metathesis reaction bucket 8, second are pressed
Filter 9, decrease temperature crystalline device 10, centrifuge 11, carbonators 12, ammonium hydroxide source 13, ammonium carbonate holding vessel 14, calcium carbonate holding vessel 15,
Second conveyer belt 16, activated carbon decolorizing tower 17 and vapour source 18；The liquid outlet of collecting pit 1 passes through pipe with the inlet of neutralization bucket 2
Road connection setting；Calcium carbonate feed inlet 2.1 and gas outlet 2.2 are respectively arranged on neutralization bucket 2；The liquid outlet of neutralization bucket 2 with
The inlet of first filter press 3 is connected to by pipeline；The liquid outlet of first filter press 3 is connected with sewage disposal system 4 by pipeline
It is logical；The discharge port of first filter press 3 is connect with the feed inlet of beater tub 6 by the first conveyer belt 5；The inlet of beater tub 6 with
The liquid outlet of fluid reservoir 7 is connected to by pipeline；The liquid outlet of beater tub 6 and the inlet of metathesis reaction bucket 8 are connected by pipeline
It is logical；Ammonium carbonate inlet 8.1 is provided on metathesis reaction bucket 8；The liquid outlet of metathesis reaction bucket 8 and the second filter press 9
Inlet be connected to by pipeline；The liquid outlet of second filter press 9 is connected to the inlet of decrease temperature crystalline device 10 by pipeline；Drop
The liquid outlet of warm crystallizer 10 is connected to the inlet of centrifuge 11 by pipeline.
Gas outlet 2.2 is connected to the air inlet of carbonators 12 by pipeline；The inlet of carbonators 12 is logical with ammonium hydroxide source 13
Piping is connected to；The liquid outlet of carbonators 12 is connected to the inlet of ammonium carbonate holding vessel 14 by pipeline；Ammonium carbonate holding vessel
14 liquid outlet is connected to ammonium carbonate inlet 8.1 by pipeline.
Vapour source 18 is connected to the air intake of metathesis reaction bucket 8 by pipeline.
The discharge port of second filter press 9 is connected to setting with the feed inlet of calcium carbonate holding vessel 15；Calcium carbonate holding vessel 15
Discharge port is connect with calcium carbonate feed inlet 2.1 by the second conveyer belt 16.
The liquid outlet of centrifuge 11 is connected to the inlet of fluid reservoir 7 by pipeline.
The liquid outlet of collecting pit 1 is connected to the inlet of activated carbon decolorizing tower 17；The liquid outlet of activated carbon decolorizing tower 17 with
The inlet of neutralization bucket 2 is connected to by pipeline；Processing system of the present invention is simple in structure, easily realizes.
Embodiment 2：The method for handling the waste water containing low-concentration sulfuric acid using system described in embodiment 1, includes the following steps：
(1) neutralization reaction；(2) first time press filtration；(3) it is beaten；(4) metathesis reaction；(5) second of press filtration；(6) crystallization filtering；Its
In：
When the coloration of the sulfur acid waste water in collecting pit 1 is higher, it is transported in activated carbon decolorizing tower 17 and carries out
Decoloration, forms colourless waste water, the appearance in order to ensure the ammonium sulfate of subsequent production is up to standard；
(1) neutralization reaction：By in the colourless sulfur acid waste water pump to neutralization bucket 2 after decoloration, then calcium carbonate is stored again
Calcium carbonate in tank 15 is periodically delivered to by the second conveyer belt 16 in neutralization bucket 2, and calcium carbonate is given birth to the sulfuric acid reaction in waste water
At calcium sulfate emulsion and carbon dioxide gas, calcium carbonate is 1.02 with sulfuric acid mass ratio：1；The carbon dioxide gas generated
It is transported in carbonators 12, sal volatile, carbon dioxide and ammonium hydroxide quality is generated with being reacted from the ammonium hydroxide in ammonium hydroxide source 13
Than being 1：2.75, the mass percent of ammonia is 28% in ammonium hydroxide；The sal volatile of generation is transported to ammonium carbonate holding vessel 14
In stored；
(2) first time press filtration：Press filtration will be carried out in calcium sulfate milkiness liquid pump to the first filter press 3, obtains calcium sulfate filter cake,
And filtered waste water is transported to sewage disposal system 4 and is further processed；So that the sulfuric acid in waste water is separated, is
Waste water carries out biochemical treatment and creates advantageous condition；
(3) it is beaten：Calcium sulfate filter cake is transported to by the first conveyer belt 5 in beater tub 6, the liquid in fluid reservoir 7 is made
It is periodically pumped into beater tub 6 with water for mashing, is then beaten 2-3h, until without apparent granular substance, form calcium sulfate slurries,
Mashing water is 0.75 with calcium sulfate filter cake mass ratio：1, the solid content in calcium sulfate filter cake is 70%；
(4) metathesis reaction：By in calcium sulfate slurry liquid pump to metathesis reaction bucket 8, and will be in ammonium carbonate holding vessel 14
Sal volatile be periodically transported in metathesis reaction bucket 8, so that calcium sulfate and ammonium carbonate is carried out metathesis reaction and sulphur be made
Sour ammonium saturated solution and calcium carbonate emulsion, until the conversion ratio of ammonium sulfate reaches 95% or more, reaction terminates；Ammonium carbonate and sulphur
Sour calcium mass ratio is 0.71：1；The steam of vapour source 18, which is passed through in metathesis reaction bucket 8, carrys out heat temperature raising, and control temperature is 40
DEG C -60 DEG C, 2h is reacted, then it is further heated up to 70 DEG C -90 DEG C, reaction 1h is to the reaction was complete；
(5) second of press filtration：Press filtration will be carried out in product pump to the second filter press 9 after metathesis reaction；It obtains
Calcium carbonate filter cake and ammonium sulfate saturated solution, calcium carbonate filter cake are transported in calcium carbonate holding vessel 15 and are stored, realized
The reuse of calcium carbonate does not generate new pollutant, production method environmental protection；
(6) crystallization filtering：Obtained ammonium sulfate saturated solution is transported to crystallize in decrease temperature crystalline device 10 and is precipitated, then
It is delivered in centrifuge 11 and carries out centrifugal filtration, the separation of solid and liquid until completing ammonium sulfate obtains ammonium sulfate solids；It is filtered
Raffinate is then transported to storage in fluid reservoir 7, realizes the reuse of filtered raffinate, does not generate new pollution
Object, production method environmental protection.
Embodiment 3：The method for handling the waste water containing low-concentration sulfuric acid using system described in embodiment 1, includes the following steps：
(1) neutralization reaction；(2) first time press filtration；(3) it is beaten；(4) metathesis reaction；(5) second of press filtration；(6) crystallization filtering；Its
In：
(1) neutralization reaction：When the sulfur acid waste water in collecting pit 1 is colourless, directly by colourless sulfur acid in collecting pit 1
In waste water pump to neutralization bucket 2, then the calcium carbonate in calcium carbonate holding vessel 15 is periodically delivered to by the second conveyer belt 16 again
In neutralization bucket 2, calcium carbonate generates calcium sulfate emulsion and carbon dioxide gas, calcium carbonate and sulfuric acid with the sulfuric acid reaction in waste water
Mass ratio is 1：1；The carbon dioxide gas generated is transported in carbonators 12, reacts life with from the ammonium hydroxide in ammonium hydroxide source 13
At sal volatile, carbon dioxide and ammonium hydroxide mass ratio are 1：2, the mass percent of ammonia is 28% in ammonium hydroxide；The carbonic acid of generation
Ammonium salt solution is transported in ammonium carbonate holding vessel 14 and is stored；
(2) first time press filtration：Press filtration will be carried out in calcium sulfate milkiness liquid pump to the first filter press 3, obtains calcium sulfate filter cake,
And filtered waste water is transported to sewage disposal system 4 and is further processed；So that the sulfuric acid in waste water is separated, is
Waste water carries out biochemical treatment and creates advantageous condition；
(3) it is beaten：Calcium sulfate filter cake is transported to by the first conveyer belt 5 in beater tub 6, the liquid in fluid reservoir 7 is made
It is periodically pumped into beater tub 6 with water for mashing, is then beaten 2-3h, until without apparent granular substance, form calcium sulfate slurries,
Mashing water is 0.5 with calcium sulfate filter cake mass ratio：1, the solid content in calcium sulfate filter cake is 70%；
(4) metathesis reaction：By in calcium sulfate slurry liquid pump to metathesis reaction bucket 8, and will be in ammonium carbonate holding vessel 14
Sal volatile be periodically transported in metathesis reaction bucket 8, so that calcium sulfate and ammonium carbonate is carried out metathesis reaction and sulphur be made
Sour ammonium saturated solution and calcium carbonate emulsion, until the conversion ratio of ammonium sulfate reaches 95% or more, reaction terminates；Ammonium carbonate and sulphur
Sour calcium mass ratio is 0.7：1；The steam of vapour source 18, which is passed through in metathesis reaction bucket 8, carrys out heat temperature raising, control temperature 40 DEG C-
60 DEG C, 2h is reacted, then it is further heated up to 70 DEG C -90 DEG C, reaction 1h is to the reaction was complete；
(5) second of press filtration：Press filtration will be carried out in product pump to the second filter press 9 after metathesis reaction；It obtains
Calcium carbonate filter cake and ammonium sulfate saturated solution, calcium carbonate filter cake are transported in calcium carbonate holding vessel 15 and are stored, realized
The reuse of calcium carbonate does not generate new pollutant, production method environmental protection；
(6) crystallization filtering：Obtained ammonium sulfate saturated solution is transported to crystallize in decrease temperature crystalline device 10 and is precipitated, then
It is delivered in centrifuge 11 and carries out centrifugal filtration, the separation of solid and liquid until completing ammonium sulfate obtains ammonium sulfate solids；It is filtered
Raffinate is then transported to storage in fluid reservoir 7, realizes the reuse of filtered raffinate, does not generate new pollution
Object, production method environmental protection.
Embodiment 4：The method for handling the waste water containing low-concentration sulfuric acid using system described in embodiment 1, includes the following steps：
(1) neutralization reaction；(2) first time press filtration；(3) it is beaten；(4) metathesis reaction；(5) second of press filtration；(6) crystallization filtering；Its
In：
(1) neutralization reaction：When the sulfur acid waste water in collecting pit 1 is colourless, directly by colourless sulfur acid in collecting pit 1
In waste water pump to neutralization bucket 2, then the calcium carbonate in calcium carbonate holding vessel 15 is periodically delivered to by the second conveyer belt 16 again
In neutralization bucket 2, calcium carbonate generates calcium sulfate emulsion and carbon dioxide gas, calcium carbonate and sulfuric acid with the sulfuric acid reaction in waste water
Mass ratio is 2：1；The carbon dioxide gas generated is transported in carbonators 12, reacts life with from the ammonium hydroxide in ammonium hydroxide source 13
At sal volatile, carbon dioxide and ammonium hydroxide mass ratio are 1：4, the mass percent of ammonia is 28% in ammonium hydroxide；The carbonic acid of generation
Ammonium salt solution is transported in ammonium carbonate holding vessel 14 and is stored；
(2) first time press filtration：Press filtration will be carried out in calcium sulfate milkiness liquid pump to the first filter press 3, obtains calcium sulfate filter cake,
And filtered waste water is transported to sewage disposal system 4 and is further processed；So that the sulfuric acid in waste water is separated, is
Waste water carries out biochemical treatment and creates advantageous condition；
(3) it is beaten：Calcium sulfate filter cake is transported to by the first conveyer belt 5 in beater tub 6, the liquid in fluid reservoir 7 is made
It is periodically pumped into beater tub 6 with water for mashing, is then beaten 2-3h, until without apparent granular substance, form calcium sulfate slurries,
Mashing water is 1 with calcium sulfate filter cake mass ratio：1, the solid content in calcium sulfate filter cake is 70%；
(4) metathesis reaction：By in calcium sulfate slurry liquid pump to metathesis reaction bucket 8, and will be in ammonium carbonate holding vessel 14
Sal volatile be periodically transported in metathesis reaction bucket 8, so that calcium sulfate and ammonium carbonate is carried out metathesis reaction and sulphur be made
Sour ammonium saturated solution and calcium carbonate emulsion, until the conversion ratio of ammonium sulfate reaches 95% or more, reaction terminates；Ammonium carbonate and sulphur
Sour calcium mass ratio is 0.8：1；The steam of vapour source 18, which is passed through in metathesis reaction bucket 8, carrys out heat temperature raising, control temperature 40 DEG C-
60 DEG C, 2h is reacted, then it is further heated up to 70 DEG C -90 DEG C, reaction 1h is to the reaction was complete；
(5) second of press filtration：Press filtration will be carried out in product pump to the second filter press 9 after metathesis reaction；It obtains
Calcium carbonate filter cake and ammonium sulfate saturated solution, calcium carbonate filter cake are transported in calcium carbonate holding vessel 15 and are stored, realized
The reuse of calcium carbonate does not generate new pollutant, production method environmental protection；
(6) crystallization filtering：Obtained ammonium sulfate saturated solution is transported to crystallize in decrease temperature crystalline device 10 and is precipitated, then
It is delivered in centrifuge 11 and carries out centrifugal filtration, the separation of solid and liquid until completing ammonium sulfate obtains ammonium sulfate solids；It is filtered
Raffinate is then transported to storage in fluid reservoir 7, realizes the reuse of filtered raffinate, does not generate new pollution
Object, production method environmental protection.
Embodiment 5：By taking 10% sulfuric acid wastewater containing prepares ammonium sulfate as an example, currently on the market the price of ammonium sulfate 1000 yuan/
Ton or so, evaporation obtain 1 ton of ammonium sulfate and about 500 yuan/ton of operating cost, synthesis ammonium sulfate are needed to consume 270kg/ tons of liquefied ammonia, at
This about 800 yuan/ton, add up to 1300 yuan/ton, is higher than selling price, therefore sulfuric acid wastewater containing of the content less than 25% is tied by evaporating
Brilliant mode prepares ammonium sulfate, and cost price is hung upside down with selling price；Using processing described in 2-4 of the embodiment of the present invention containing low
The method of concentration sulphuric acid waste water neutralizes 1 ton of waste water consumption calcium carbonate 102kg (90% recycles, 10% loss), therefore often gives birth to
1 ton of ammonium sulfate is produced, 37 yuan/ton of calcium carbonate cost is needed；Ammonium hydroxide absorbing carbon dioxide consumes liquefied ammonia, therefore often produces 1 ton of sulfuric acid
Ammonium needs 800 yuan/ton of liquefied ammonia cost；And without heavy-duty motor in the technique productions, the electricity charge are negligible；And then it is total
About 837 yuan/ton of cost for producing 1 ton of ammonium sulfate, may be implemented to get a profit；Therefore ammonium sulfate is prepared using the present invention, reduces life
At the cost of ammonium sulfate.
By taking 10% sulfuric acid wastewater containing prepares ammonium sulfate as an example, using conventional method by ammonium hydroxide and 10% sulfuric acid wastewater containing it is direct in
With, about 10% ammonium sulfate is obtained, evaporator concentrated vitriol ammonium salt solution need to be first passed through to 40% or so, then decrease temperature crystalline,
Often concentrate about 75 degree of the power consumption of 1 ton of waste water；What then the embodiment of the present invention 2- embodiments 4 were refiltered by being initially formed calcium sulfate
Sulfate is directly concentrated to 70% or more content, then decrease temperature crystalline by method, the step of evaporating power consumption is omitted, therefore pass through
The present invention prepares ammonium sulfate, and low energy consumption.
It is the preferred embodiment of the present invention above, for those skilled in the art, is not departing from
Under the premise of the principle of the invention, several improvements and modifications can also be made, these improvements and modifications also should be regarded as the guarantor of the present invention
Protect range.
Claims (12)
1. a kind of processing system of waste water containing low-concentration sulfuric acid, which is characterized in that it includes collecting pit, neutralization bucket, the first press filtration
Machine, sewage disposal system, the first conveyer belt, beater tub, fluid reservoir, metathesis reaction bucket, the second filter press, decrease temperature crystalline device and
Centrifuge；The liquid outlet of the collecting pit is connected to setting with the inlet of the neutralization bucket by pipeline；On the neutralization bucket
It is respectively arranged with calcium carbonate feed inlet and gas outlet；The liquid outlet of the neutralization bucket and the inlet of first filter press pass through
Pipeline is connected to；The liquid outlet of first filter press is connected to the sewage disposal system by pipeline；First filter press
The feed inlet of discharge port and the beater tub pass through the first transmission band connection；The inlet of the beater tub and the storage
The liquid outlet of flow container is connected to by pipeline；The liquid outlet of the beater tub and the inlet of the metathesis reaction bucket pass through pipeline
Connection；It is provided with ammonium carbonate inlet on the metathesis reaction bucket；The liquid outlet of the metathesis reaction bucket and described the
The inlet of two filter presses is connected to by pipeline；The liquid outlet of second filter press and the inlet of the decrease temperature crystalline device are logical
Piping is connected to；The liquid outlet of the decrease temperature crystalline device is connected to the inlet of the centrifuge by pipeline.
2. a kind of processing system of waste water containing low-concentration sulfuric acid according to claim 1, which is characterized in that it further includes carbon
Change tower, ammonium hydroxide source and ammonium carbonate holding vessel；The gas outlet is connected to the air inlet of the carbonators by pipeline；The carbonization
The inlet of tower is connected to the ammonium hydroxide source by pipeline；The feed liquor of the liquid outlet of the carbonators and the ammonium carbonate holding vessel
Mouth is connected to by pipeline；The liquid outlet of the ammonium carbonate holding vessel is connected to the ammonium carbonate inlet by pipeline.
3. a kind of processing system of waste water containing low-concentration sulfuric acid according to claim 1, which is characterized in that it further includes steaming
Vapour source；The vapour source is connected to the air intake of the metathesis reaction bucket by pipeline.
4. a kind of processing system of waste water containing low-concentration sulfuric acid according to claim 1, which is characterized in that it further includes carbon
Sour calcium holding vessel and the second conveyer belt；The discharge port of second filter press is connected to the feed inlet of the calcium carbonate holding vessel and sets
It sets；The discharge port of the calcium carbonate holding vessel transmits band connection with the calcium carbonate feed inlet by described second.
5. a kind of processing system of waste water containing low-concentration sulfuric acid according to claim 1, which is characterized in that the centrifuge
Liquid outlet be connected to by pipeline with the inlet of the fluid reservoir.
6. a kind of processing system of waste water containing low-concentration sulfuric acid according to claim 1, which is characterized in that it further includes living
Property carbon decoloring tower；The liquid outlet of the collecting pit is connected to the inlet of the activated carbon decolorizing tower；The activated carbon decolorizing tower
Liquid outlet be connected to by pipeline with the inlet of the neutralization bucket.
7. a kind of processing method of waste water containing low-concentration sulfuric acid, which is characterized in that include the following steps：(1) neutralization reaction；(2)
First time press filtration；(3) it is beaten；(4) metathesis reaction；(5) second of press filtration；(6) crystallization filtering；Wherein：
(1) neutralization reaction：By in sulfur acid waste water pump to neutralization bucket, calcium carbonate, calcium carbonate are then added into the neutralization bucket
Calcium sulfate emulsion and carbon dioxide gas are generated with the sulfuric acid reaction in waste water, calcium carbonate is 1 with sulfuric acid mass ratio:1-2:1；
(2) first time press filtration：Press filtration will be carried out in calcium sulfate milkiness liquid pump to the first filter press, obtains calcium sulfate filter cake, and mistake
Waste water after filter is transported to sewage disposal system and is further processed；
(3) it is beaten：Calcium sulfate filter cake is transported to by the first conveyer belt in beater tub, 2-3h is beaten after adding mashing water,
Calcium sulfate slurries are formed, mashing water is 0.5 with calcium sulfate filter cake mass ratio:1-1:1, the solid content in calcium sulfate filter cake is
70%；
(4) metathesis reaction：By in calcium sulfate slurry liquid pump to metathesis reaction bucket, and added into the metathesis reaction bucket
Ammonium carbonate makes calcium sulfate carry out metathesis reaction with ammonium carbonate and ammonium sulfate saturated solution and calcium carbonate emulsion, ammonium carbonate is made
It is 0.7 with calcium sulfate mass ratio:1-1.2:1；
(5) second of press filtration：Press filtration will be carried out in product pump to the second filter press after metathesis reaction；Obtain calcium carbonate
Filter cake and ammonium sulfate saturated solution；
(6) crystallization filtering：Obtained ammonium sulfate saturated solution is transported to crystallize in decrease temperature crystalline device and is precipitated, is then sent to
Centrifugal filtration is carried out in centrifuge, the separation of solid and liquid until completing ammonium sulfate obtains ammonium sulfate solids.
8. the processing method of the waste water according to claim 7 containing low-concentration sulfuric acid, which is characterized in that in step 1 with reaction
Before further include decolorization process, the waste water in collecting pit, which is transported in activated carbon decolorizing tower, to decolourize, and forms colourless waste water, so
Colourless waste water is delivered to progress neutralization reaction processing in the neutralization bucket in step 1 afterwards.
9. the processing method of the waste water according to claim 7 containing low-concentration sulfuric acid, which is characterized in that two generated in step 1
Carbon oxide gas is transported in carbonators, is reacted with the ammonium hydroxide come from ammonium hydroxide source and is generated sal volatile, carbon dioxide and ammonia
Water quality ratio is 1:2-1:4, the mass percent of ammonia is 28% in ammonium hydroxide；The sal volatile of generation is transported to ammonium carbonate storage
It deposits in tank and is stored, the sal volatile in the ammonium carbonate holding vessel is periodically transported to the double decomposition in step 4
Metathesis reaction is carried out in reaction container.
10. the processing method of the waste water according to claim 7 containing low-concentration sulfuric acid, which is characterized in that the steam of vapour source is passed through
Carry out heat temperature raising in the metathesis reaction bucket in step 4, control temperature reacts 2h, then followed by of continuing rising at 40 DEG C -60 DEG C
Temperature is to 70 DEG C -90 DEG C, and reaction 1h is to the reaction was complete.
11. the processing method of the waste water according to claim 7 containing low-concentration sulfuric acid, which is characterized in that the carbon that will be obtained in step 5
Sour calcium filter cake, which is transported in calcium carbonate holding vessel, to be stored, and the calcium carbonate in the calcium carbonate holding vessel is periodically passed by second
It send band to be delivered in the neutralization bucket in step 1 and carries out neutralization reaction.
12. the processing method of the waste water according to claim 7 containing low-concentration sulfuric acid, which is characterized in that will be centrifuged described in step 6
The filtered raffinate of machine is transported to storage in fluid reservoir, and the liquid in the fluid reservoir is periodically pumped into step as mashing with water
It is beaten in the beater tub in 3.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110963510A (en) * | 2020-01-13 | 2020-04-07 | 山东齐创石化工程有限公司 | Recovery processing device and process for waste sulfuric acid |
| CN111410212A (en) * | 2020-03-09 | 2020-07-14 | 安徽海德化工科技有限公司 | Method for recycling sulfuric acid production wastewater |
| CN113666388A (en) * | 2021-08-25 | 2021-11-19 | 浙江闰土股份有限公司 | Treatment method of dye wastewater |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1615840A (en) * | 2003-11-16 | 2005-05-18 | 刘力 | Sodium camsylate freeze-dried powder injection preparation and its preparing method |
| WO2014018419A1 (en) * | 2012-07-21 | 2014-01-30 | K-Technologies, Inc. | Processes for the recovery of fluoride and silica products and phosphoric acid from wet-process phosphoric acid facilities and contaminated waste waters |
| CN104045181A (en) * | 2014-05-08 | 2014-09-17 | 昆明有色冶金设计研究院股份公司 | Waste acid treatment system and method |
| CN104192971A (en) * | 2014-08-29 | 2014-12-10 | 中国科学院过程工程研究所 | Method for treating industrial wastewater containing sulfuric acid |
| CN104562176A (en) * | 2014-12-19 | 2015-04-29 | 浙江闰土研究院有限公司 | Method for preparing calcium sulfate crystal whisker from wastewater in production process of dyes and intermediates thereof |
| CN105836921A (en) * | 2016-05-04 | 2016-08-10 | 浙江闰土研究院有限公司 | Treatment method of dye washing wastewater |
-
2018
- 2018-05-02 CN CN201810409644.4A patent/CN108569812B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1615840A (en) * | 2003-11-16 | 2005-05-18 | 刘力 | Sodium camsylate freeze-dried powder injection preparation and its preparing method |
| WO2014018419A1 (en) * | 2012-07-21 | 2014-01-30 | K-Technologies, Inc. | Processes for the recovery of fluoride and silica products and phosphoric acid from wet-process phosphoric acid facilities and contaminated waste waters |
| CN104045181A (en) * | 2014-05-08 | 2014-09-17 | 昆明有色冶金设计研究院股份公司 | Waste acid treatment system and method |
| CN104192971A (en) * | 2014-08-29 | 2014-12-10 | 中国科学院过程工程研究所 | Method for treating industrial wastewater containing sulfuric acid |
| CN104562176A (en) * | 2014-12-19 | 2015-04-29 | 浙江闰土研究院有限公司 | Method for preparing calcium sulfate crystal whisker from wastewater in production process of dyes and intermediates thereof |
| CN105836921A (en) * | 2016-05-04 | 2016-08-10 | 浙江闰土研究院有限公司 | Treatment method of dye washing wastewater |
Non-Patent Citations (1)
| Title |
|---|
| 蒋家俊等: "《化学工艺学（无机部分》", 30 April 1988 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110963510A (en) * | 2020-01-13 | 2020-04-07 | 山东齐创石化工程有限公司 | Recovery processing device and process for waste sulfuric acid |
| CN111410212A (en) * | 2020-03-09 | 2020-07-14 | 安徽海德化工科技有限公司 | Method for recycling sulfuric acid production wastewater |
| CN113666388A (en) * | 2021-08-25 | 2021-11-19 | 浙江闰土股份有限公司 | Treatment method of dye wastewater |
| CN113666388B (en) * | 2021-08-25 | 2023-04-07 | 浙江闰土股份有限公司 | Treatment method of dye wastewater |
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