CN108046336A - The industrial process of green vitriol crystal - Google Patents
The industrial process of green vitriol crystal Download PDFInfo
- Publication number
- CN108046336A CN108046336A CN201810002141.5A CN201810002141A CN108046336A CN 108046336 A CN108046336 A CN 108046336A CN 201810002141 A CN201810002141 A CN 201810002141A CN 108046336 A CN108046336 A CN 108046336A
- Authority
- CN
- China
- Prior art keywords
- sulfuric acid
- waste sulfuric
- green vitriol
- industrial process
- heating evaporation
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G49/00—Compounds of iron
- C01G49/14—Sulfates
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2006/00—Physical properties of inorganic compounds
- C01P2006/80—Compositional purity
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
- Inorganic Compounds Of Heavy Metals (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
This application discloses a kind of industrial processes of green vitriol crystal, include the following steps：Waste Sulfuric Acid after pickling iron and steel is pumped into plate and frame filter press by closed conduit and filtered by S1；Waste Sulfuric Acid after filtering is pumped into preheater preheating by S2；Waste Sulfuric Acid after preheating is passed through heating evaporation in evaporator by S3, and when heating evaporation controls Waste Sulfuric Acid temperature to be less than 80 DEG C；S4 by the Waste Sulfuric Acid after heating evaporation be passed through in crystallization kettle stirring 6 it is small when, subsequent crystallisation by cooling forms finished product after centrifuging out by crystal.The advantage of the invention is that by evaporating spent acid, green vitriol crystal is generated, production pollution is small, easy to operate, is a very promising dangerous waste disposing technique, and pickling iron and steel industry is helped to relieve trouble and worry.
Description
Technical field
This application involves chemical industries, particularly a kind of industrial process of green vitriol crystal.
Background technology
During with sulfuric acid decomposition titanium dioxide, generate ferrous sulfate and ferric sulfate, ferric iron are reduced into ferrous iron with iron wire, pass through
Freezing and crystallizing can obtain ferrous sulfate by-product, and ferrous sulfate crystallization impurity is more.
The content of the invention
The present invention generates green vitriol crystal, production pollution is small, easy to operate, is one by evaporating spent acid
Very promising dangerous waste disposing technique helps pickling iron and steel industry to relieve trouble and worry.
To achieve the above object, the present invention provides following technical solution：
The embodiment of the present application discloses a kind of industrial process of green vitriol crystal, includes the following steps：
Waste Sulfuric Acid after pickling iron and steel is pumped into plate and frame filter press by closed conduit and filtered by S1；
Waste Sulfuric Acid after filtering is pumped into preheater preheating by S2；
Waste Sulfuric Acid after preheating is passed through heating evaporation in evaporator by S3, and when heating evaporation controls Waste Sulfuric Acid temperature to be less than 80
℃；
S4 by the Waste Sulfuric Acid after heating evaporation be passed through in crystallization kettle stirring 6 it is small when, subsequent crystallisation by cooling, by crystal centrifugation point
It separates out and forms finished product after coming.
Preferably, in the industrial process of above-mentioned green vitriol crystal, after being filtered in the step S1
Filter residue and spent acid pond in sediment centralized processing.
Preferably, in the industrial process of above-mentioned green vitriol crystal, using steaming in the step S3
Vapour heats the evaporator, and steam waste heat is preheated the preheater.
Preferably, in the industrial process of above-mentioned green vitriol crystal, Waste Sulfuric Acid in the step S3
Using circulating cooling water condensation after the gas collection that middle heating evaporation goes out, and absorbed with lye.
Preferably, in the industrial process of above-mentioned green vitriol crystal, when being evaporated in the step S3
Between for 2 it is small when.
Preferably, in the industrial process of above-mentioned green vitriol crystal, in the step S4, in chuck
Waste Sulfuric Acid is quickly cooled down by the way of chilled brine, when temperature is down to 30 DEG C, solidliquid mixture is squeezed into centrifuge separation.
Preferably, in the industrial process of above-mentioned green vitriol crystal, in the step S4, centrifugation point
Mother liquor from after is used for polymerization ferrous sulfate.
The advantage of the invention is that comparing the product of other technique productions, product impurity is few, and product quality improves；Evaporation is anti-
It should be carried out under the conditions of totally-enclosed, production pollution is small；After filter press filtering, product impurity tails off, and product quality improves.
Description of the drawings
It in order to illustrate the technical solutions in the embodiments of the present application or in the prior art more clearly, below will be to embodiment or existing
There is attached drawing needed in technology description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments described in application, for those of ordinary skill in the art, without creative efforts,
It can also be obtained according to these attached drawings other attached drawings.
Fig. 1 show the flow chart of the industrial process of green vitriol crystal in the specific embodiment of the invention.
Specific embodiment
Below in conjunction with the attached drawing in the embodiment of the present invention, detailed retouch is carried out to the technical solution in the embodiment of the present invention
It states, it is clear that described embodiment is only part of the embodiment of the present invention, instead of all the embodiments.Based on the present invention
In embodiment, the every other implementation that those of ordinary skill in the art are obtained on the premise of creative work is not made
Example, belongs to the scope of protection of the invention.
With reference to shown in Fig. 1, specific embodiment is as follows：
Embodiment 1
Waste Sulfuric Acid after pickling iron and steel is pumped into plate and frame filter press by closed conduit and filtered by S1, filter residue after filtering and useless
Sediment centralized processing in sour pond；
Waste Sulfuric Acid after filtering is pumped into preheater preheating by S2, is preheated with step S3 steam waste heats；
Waste Sulfuric Acid after preheating is passed through in evaporator using steam heating evaporation by S3, and 78 DEG C of control Waste Sulfuric Acid temperature is steamed
Time 2 h is sent out, using circulating cooling water condensation after the gas collection that heating evaporation goes out in Waste Sulfuric Acid, and is absorbed with lye；
S4 by the Waste Sulfuric Acid after heating evaporation be passed through crystallization kettle stirring 6 it is small when, it is fast by the way of chilled brine in chuck
Quickly cooling but when temperature is down to 30 DEG C, is squeezed into centrifuge separation, crystal is isolated by Waste Sulfuric Acid, crystallisation by cooling by solidliquid mixture
Finished product is formed after coming, the mother liquor after centrifugation is used for polymerization ferrous sulfate.
Embodiment 2
Waste Sulfuric Acid after pickling iron and steel is pumped into plate and frame filter press by closed conduit and filtered by S1, filter residue after filtering and useless
Sediment centralized processing in sour pond；
Waste Sulfuric Acid after filtering is pumped into preheater preheating by S2, is preheated with step S3 steam waste heats；
Waste Sulfuric Acid after preheating is passed through in evaporator using steam heating evaporation by S3, and 76 DEG C of control Waste Sulfuric Acid temperature is steamed
When the hair time 1.7 is small, using circulating cooling water condensation after the gas collection that heating evaporation goes out in Waste Sulfuric Acid, and absorbed with lye；
S4 by the Waste Sulfuric Acid after heating evaporation be passed through crystallization kettle stirring 6.5 it is small when, in chuck by the way of chilled brine
Waste Sulfuric Acid, crystallisation by cooling are quickly cooled down, when temperature is down to 33 DEG C, solidliquid mixture is squeezed into centrifuge separation, crystal is separated
Finished product is formed after out, the mother liquor after centrifugation is used for polymerization ferrous sulfate.
Embodiment 3
Waste Sulfuric Acid after pickling iron and steel is pumped into plate and frame filter press by closed conduit and filtered by S1, filter residue after filtering and useless
Sediment centralized processing in sour pond；
Waste Sulfuric Acid after filtering is pumped into preheater preheating by S2, is preheated with step S3 steam waste heats；
Waste Sulfuric Acid after preheating is passed through in evaporator using steam heating evaporation by S3, and 77 DEG C of control Waste Sulfuric Acid temperature is steamed
Time 2 h is sent out, using circulating cooling water condensation after the gas collection that heating evaporation goes out in Waste Sulfuric Acid, and is absorbed with lye；
S4 by the Waste Sulfuric Acid after heating evaporation be passed through crystallization kettle stirring 6.2 it is small when, in chuck by the way of chilled brine
Waste Sulfuric Acid, crystallisation by cooling are quickly cooled down, when temperature is down to 31 DEG C, solidliquid mixture is squeezed into centrifuge separation, crystal is separated
Finished product is formed after out, the mother liquor after centrifugation is used for polymerization ferrous sulfate.
After measured, the finished product FeSO of embodiment 1-34·7H2O purity such as following table：
| Embodiment | Embodiment 1 | Embodiment 2 | Embodiment 3 |
| Purity (mass percent %) | 98.6% | 97.2% | 97.8% |
Present embodiment does not simply limit its protection domain to the exemplary illustration of this patent, and those skilled in the art are also
Local change can be carried out to it, as long as it does not exceed the essence of this patent, all be considered as the equivalent substitution to this patent, all
Within the protection domain of this patent.
Claims (7)
1. a kind of industrial process of green vitriol crystal, which is characterized in that include the following steps：
Waste Sulfuric Acid after pickling iron and steel is pumped into plate and frame filter press by closed conduit and filtered by S1；
Waste Sulfuric Acid after filtering is pumped into preheater preheating by S2；
Waste Sulfuric Acid after preheating is passed through heating evaporation in evaporator by S3, and when heating evaporation controls Waste Sulfuric Acid temperature to be less than 80 DEG C；
S4 by the Waste Sulfuric Acid after heating evaporation be passed through in crystallization kettle stirring 6 it is small when, subsequent crystallisation by cooling centrifuges out crystal
Finished product is formed after coming.
2. the industrial process of green vitriol crystal according to claim 1, which is characterized in that the step
Sediment centralized processing in filter residue and spent acid pond after being filtered in S1.
3. the industrial process of green vitriol crystal according to claim 1, which is characterized in that the step
The evaporator is heated using steam in S3, and steam waste heat is preheated into the preheater.
4. the industrial process of green vitriol crystal according to claim 1, which is characterized in that the step
Using circulating cooling water condensation after the gas collection that heating evaporation goes out in Waste Sulfuric Acid in S3, and absorbed with lye.
5. the industrial process of green vitriol crystal according to claim 1, which is characterized in that the step
When evaporation time is 2 small in S3.
6. the industrial process of green vitriol crystal according to claim 1, which is characterized in that the step
In S4, Waste Sulfuric Acid is quickly cooled down in chuck by the way of chilled brine, when temperature is down to 30 DEG C, by solidliquid mixture squeeze into from
Scheming separates.
7. the industrial process of green vitriol crystal according to claim 1, which is characterized in that the step
In S4, the mother liquor after centrifugation is used for polymerization ferrous sulfate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810002141.5A CN108046336A (en) | 2018-01-02 | 2018-01-02 | The industrial process of green vitriol crystal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810002141.5A CN108046336A (en) | 2018-01-02 | 2018-01-02 | The industrial process of green vitriol crystal |
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| Publication Number | Publication Date |
|---|---|
| CN108046336A true CN108046336A (en) | 2018-05-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810002141.5A Pending CN108046336A (en) | 2018-01-02 | 2018-01-02 | The industrial process of green vitriol crystal |
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| CN (1) | CN108046336A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112573786A (en) * | 2020-10-12 | 2021-03-30 | 江苏荣信环保科技有限公司 | Treatment process for waste sulfuric acid sludge on surface of metal product |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2960391A (en) * | 1958-10-29 | 1960-11-15 | Singmaster & Breyer Inc | Regeneration of spent pickle liquor |
| CN1760117A (en) * | 2005-10-19 | 2006-04-19 | 兰州大学 | Method for recovering vitriol from waste vitrol containing metal salt |
| CN202220087U (en) * | 2011-07-27 | 2012-05-16 | 杨德林 | Regeneration processing device for waste acid through evaporation method |
| CN102828192A (en) * | 2012-08-29 | 2012-12-19 | 南京化工职业技术学院 | Resourceful treatment method for pickling waste liquor in steel industry |
| CN102910594A (en) * | 2012-11-06 | 2013-02-06 | 黄正源 | Method for concentrating waste sulfuric acid by utilizing waste heat of titanium dioxide calcinator |
-
2018
- 2018-01-02 CN CN201810002141.5A patent/CN108046336A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2960391A (en) * | 1958-10-29 | 1960-11-15 | Singmaster & Breyer Inc | Regeneration of spent pickle liquor |
| CN1760117A (en) * | 2005-10-19 | 2006-04-19 | 兰州大学 | Method for recovering vitriol from waste vitrol containing metal salt |
| CN202220087U (en) * | 2011-07-27 | 2012-05-16 | 杨德林 | Regeneration processing device for waste acid through evaporation method |
| CN102828192A (en) * | 2012-08-29 | 2012-12-19 | 南京化工职业技术学院 | Resourceful treatment method for pickling waste liquor in steel industry |
| CN102910594A (en) * | 2012-11-06 | 2013-02-06 | 黄正源 | Method for concentrating waste sulfuric acid by utilizing waste heat of titanium dioxide calcinator |
Non-Patent Citations (1)
| Title |
|---|
| 武汉钢铁公司编: "《工业污染防治及其技术经济分析》", 30 June 1991, 冶金工业出版社 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112573786A (en) * | 2020-10-12 | 2021-03-30 | 江苏荣信环保科技有限公司 | Treatment process for waste sulfuric acid sludge on surface of metal product |
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Application publication date: 20180518 |
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