CN106186031A - A kind of desulfurated plaster preparation method changing alkali based on farmland - Google Patents
A kind of desulfurated plaster preparation method changing alkali based on farmland Download PDFInfo
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- CN106186031A CN106186031A CN201610547030.3A CN201610547030A CN106186031A CN 106186031 A CN106186031 A CN 106186031A CN 201610547030 A CN201610547030 A CN 201610547030A CN 106186031 A CN106186031 A CN 106186031A
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- Prior art keywords
- gypsum
- farmland
- desulfurated plaster
- crystal grain
- concentration
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F11/00—Compounds of calcium, strontium, or barium
- C01F11/46—Sulfates
- C01F11/464—Sulfates of Ca from gases containing sulfur oxides
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K17/00—Soil-conditioning materials or soil-stabilising materials
- C09K17/02—Soil-conditioning materials or soil-stabilising materials containing inorganic compounds only
- C09K17/06—Calcium compounds, e.g. lime
-
- 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
- C01P2006/82—Compositional purity water content
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K2101/00—Agricultural use
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K2109/00—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE pH regulation
Abstract
The invention discloses a kind of desulfurated plaster preparation method changing alkali based on farmland, comprise the steps: fume collection, slurrying, oxidation, heat treatment, concentrate, be dehydrated, wash and be dried.This invention can reduce Gypsum Fibrosum moisture content, increases Gypsum Fibrosum concentration, it is ensured that rapid crystallization, improves dewatering efficiency, saves the working time, effectively improves soil Acidity of Aikalinity.
Description
Technical field
The invention belongs to improvement field, farmland, more specifically, particularly relate to a kind of desulfurated plaster changing alkali based on farmland
Preparation method.
Background technology
Wet desulfurizing process is current most widely used general, flue gas desulfurization technique that technology is the most ripe, accounts for installing flue gas
The 90% of desulfurization (FGD) fired power generating unit capacity.Wet desulfurizing process includes limestone-gypsum method, white clay, acetylene sludge-gypsum process
Etc. alkaline waste sulfur removal technology, its desulfurizing byproduct is desulfurated plaster.Desulfurated plaster is mainly composed of calcium sulphate dihydrate, can be extensive
It is applied to farmland and changes alkali.In general the Gypsum Fibrosum of desulphurization system output is needed to meet moisture content ＜ desulfurated plaster recycling
The conditions such as 10%, purity (in terms of calcium sulphate dihydrate mass fraction in butt) ＞ 90%.
But, current desulfurated plaster is often difficult to reach These parameters, particularly moisture content often ＞ 10%, in certain journey
The recycling of desulfurated plaster is constrained on degree.The preparation method of desulfurated plaster is excessively simple simultaneously, is difficult to effective to soil
Ground is improved, and increases improvement cost.
Summary of the invention
The invention aims to solve shortcoming present in prior art, and propose a kind of change alkali based on farmland
Desulfurated plaster preparation method.
For achieving the above object, the present invention provides following technical scheme:
A kind of desulfurated plaster preparation method changing alkali based on farmland, comprises the steps:
S1, fume collection: the flue gas of coal-burning power plant's discharge is importing inside smoke absorption device after first passing through dedusting；
S2, slurrying: to the flue gas shower water in smoke absorption device, form gypsum material after then passing to large quantity of air reaction
Slurry；
S3, oxidation: stir with agitator after adding flocculant in Gypsum slurry is contained in beaker, beaker is added simultaneously
Heat, to 40 DEG C-50 DEG C, makes Gypsum slurry occur oxidation to form liquid gypsum crystal grain；
S4, heat treatment: in liquid gypsum crystal grain, addition sodium chloride solution post-heating is to 80 DEG C-90 DEG C, at the uniform velocity stirs 3-
5h；
S5, concentration: its concentration is concentrated putting into concentrator after the Gypsum Fibrosum crystal grain impurity screening after process；
S6, dehydration: the Gypsum Fibrosum crystal grain after concentration is placed on inside centrifuge dehumidifier and carries out processed, eventually form solid-state
Two water desulfurated plasters；
S7, washing: with the hot water of 85 DEG C-95 DEG C, two water desulfurated plasters are washed three times, then adding dehydrated alcohol eventually
Only reaction；
S8, it is dried: the Gypsum Fibrosum after washing is put into drying in oven 1-2h of 40 DEG C-55 DEG C, is then placed in exsiccator
Preserve stand-by.
Preferably, described flocculant is activated silica.
Preferably, described agitator is built-in single leaf agitator.
The technique effect of the present invention and advantage: a kind of desulfurated plaster preparation side changing alkali based on farmland that the present invention provides
Method, is concentrated by concentrator and can increase the quality of Gypsum Fibrosum crystal grain, it is ensured that gypsum purity is more than 90%, is beneficial to improve soil soda acid
Property, the dehydration of centrifuge dehumidifier ensures that the moisture content of two water desulfurated plasters is less than 10%, by adding after the hot wash of nearly boiling
Dehydrated alcohol can reduce Gypsum Fibrosum moisture content further, strengthens improvement soil effect, and drying with drying oven can be so that Gypsum Fibrosum
Storage, convenient use, flocculant is activated silica, and activated silica can change the surface free energy of solution, and can optionally be inhaled
The attached macroscopic property changing the surface of solids on a solid surface, thus reach to promote the effect of grain growth, agitator is interior
Putting single leaf agitator can make stirring immediate stability ensure mixing quality, reduces labour force, and it is aqueous that this invention can reduce Gypsum Fibrosum
Rate, increases Gypsum Fibrosum concentration, it is ensured that rapid crystallization, improves dewatering efficiency, saves the working time, effectively improves soil Acidity of Aikalinity.
Detailed description of the invention
In order to make the purpose of the present invention, technical scheme and advantage clearer, below in conjunction with specific embodiment, to this
Invention is further elaborated, it is clear that described embodiment is only a part of embodiment of the present invention rather than complete
The embodiment in portion.Specific embodiment described herein only in order to explain the present invention, is not intended to limit the present invention.Based on this
Embodiment in invention, the every other reality that those of ordinary skill in the art are obtained under not making creative work premise
Execute example, broadly fall into the scope of protection of the invention.
Embodiment 1
A kind of desulfurated plaster preparation method changing alkali based on farmland, comprises the steps:
S1, fume collection: the flue gas of coal-burning power plant's discharge is importing inside smoke absorption device after first passing through dedusting；
S2, slurrying: to the flue gas shower water in smoke absorption device, form gypsum material after then passing to large quantity of air reaction
Slurry；
S3, oxidation: stir, simultaneously with built-in single leaf agitator after adding activated silica in Gypsum slurry is contained in beaker
Beaker is heated to 40 DEG C, makes Gypsum slurry occur oxidation to form liquid gypsum crystal grain；
S4, heat treatment: in liquid gypsum crystal grain, addition sodium chloride solution post-heating is to 80 DEG C, at the uniform velocity stirs 3h；
S5, concentration: its concentration is concentrated putting into concentrator after the Gypsum Fibrosum crystal grain impurity screening after process；
S6, dehydration: the Gypsum Fibrosum crystal grain after concentration is placed on inside centrifuge dehumidifier and carries out processed, eventually form solid-state
Two water desulfurated plasters；
S7, washing: with the hot water of 85 DEG C, two water desulfurated plasters are washed three times, then adding dehydrated alcohol termination instead
Should；
S8, it is dried: the Gypsum Fibrosum after washing is put into drying in oven 1h of 40 DEG C, preserves in being then placed on exsiccator and treat
With.
Embodiment 2
A kind of desulfurated plaster preparation method changing alkali based on farmland, comprises the steps:
S1, fume collection: the flue gas of coal-burning power plant's discharge is importing inside smoke absorption device after first passing through dedusting；
S2, slurrying: to the flue gas shower water in smoke absorption device, form gypsum material after then passing to large quantity of air reaction
Slurry；
S3, oxidation: stir, simultaneously with built-in single leaf agitator after adding activated silica in Gypsum slurry is contained in beaker
Beaker is heated to 45 DEG C, makes Gypsum slurry occur oxidation to form liquid gypsum crystal grain；
S4, heat treatment: in liquid gypsum crystal grain, addition sodium chloride solution post-heating is to 85 DEG C, at the uniform velocity stirs 4h；
S5, concentration: its concentration is concentrated putting into concentrator after the Gypsum Fibrosum crystal grain impurity screening after process；
S6, dehydration: the Gypsum Fibrosum crystal grain after concentration is placed on inside centrifuge dehumidifier and carries out processed, eventually form solid-state
Two water desulfurated plasters；
S7, washing: with the hot water of 90 DEG C, two water desulfurated plasters are washed three times, then adding dehydrated alcohol termination instead
Should；
S8, it is dried: the Gypsum Fibrosum after washing is put into drying in oven 1.5h of 48 DEG C, preserves in being then placed on exsiccator and treat
With.
Embodiment 3
A kind of desulfurated plaster preparation method changing alkali based on farmland, comprises the steps:
S1, fume collection: the flue gas of coal-burning power plant's discharge is importing inside smoke absorption device after first passing through dedusting；
S2, slurrying: to the flue gas shower water in smoke absorption device, form gypsum material after then passing to large quantity of air reaction
Slurry；
S3, oxidation: stir, simultaneously with built-in single leaf agitator after adding activated silica in Gypsum slurry is contained in beaker
Beaker is heated to 50 DEG C, makes Gypsum slurry occur oxidation to form liquid gypsum crystal grain；
S4, heat treatment: in liquid gypsum crystal grain, addition sodium chloride solution post-heating is to 90 DEG C, at the uniform velocity stirs 5h；
S5, concentration: its concentration is concentrated putting into concentrator after the Gypsum Fibrosum crystal grain impurity screening after process；
S6, dehydration: the Gypsum Fibrosum crystal grain after concentration is placed on inside centrifuge dehumidifier and carries out processed, eventually form solid
State two water desulfurated plaster；
S7, washing: with the hot water of 95 DEG C, two water desulfurated plasters are washed three times, then adding dehydrated alcohol termination instead
Should；
S8, it is dried: the Gypsum Fibrosum after washing is put into drying in oven 2h of 55 DEG C, preserves in being then placed on exsiccator and treat
With.
In sum: a kind of desulfurated plaster preparation method changing alkali based on farmland that the present invention provides, dense by concentrator
Contracting can increase the quality of Gypsum Fibrosum crystal grain, it is ensured that gypsum purity is more than 90%, is beneficial to improve soil Acidity of Aikalinity, centrifuge dehumidifier
Dehydration ensure the moisture content of two water desulfurated plasters less than 10%, by one can be entered with adding dehydrated alcohol after the hot wash of nearly boiling
Step reduces Gypsum Fibrosum moisture content, and reinforcement improves soil effect, dries can wad a quilt with cotton so that Gypsum Fibrosum storage, convenient use with drying oven
Solidifying agent is activated silica, and activated silica can change the surface free energy of solution, and can be selectively adsorbed on the surface of solids and change
Becoming the macroscopic property of the surface of solids, thus reach to promote the effect of grain growth, agitator is that built-in single leaf agitator is permissible
Making stirring immediate stability ensure mixing quality, reduce labour force, this invention can reduce Gypsum Fibrosum moisture content, increases Gypsum Fibrosum concentration,
Ensure rapid crystallization, improve dewatering efficiency, save the working time, effectively improve soil Acidity of Aikalinity.
Finally it is noted that the foregoing is only the preferred embodiments of the present invention, it is not limited to the present invention,
Although being described in detail the present invention with reference to previous embodiment, for a person skilled in the art, it still may be used
So that the technical scheme described in foregoing embodiments to be modified, or wherein portion of techniques feature is carried out equivalent,
All within the spirit and principles in the present invention, any modification, equivalent substitution and improvement etc. made, should be included in the present invention's
Within protection domain.
Claims (3)
1. the desulfurated plaster preparation method changing alkali based on farmland, it is characterised in that: comprise the steps:
S1, fume collection: the flue gas of coal-burning power plant's discharge is importing inside smoke absorption device after first passing through dedusting；
S2, slurrying: to the flue gas shower water in smoke absorption device, form Gypsum slurry after then passing to large quantity of air reaction；
S3, oxidation: stir with agitator after adding flocculant in Gypsum slurry is contained in beaker, beaker is heated to simultaneously
40 DEG C-50 DEG C, Gypsum slurry is made to occur oxidation to form liquid gypsum crystal grain；
S4, heat treatment: in liquid gypsum crystal grain, addition sodium chloride solution post-heating is to 80 DEG C-90 DEG C, at the uniform velocity stirs 3-5h；
S5, concentration: its concentration is concentrated putting into concentrator after the Gypsum Fibrosum crystal grain impurity screening after process；
S6, dehydration: the Gypsum Fibrosum crystal grain after concentration is placed on inside centrifuge dehumidifier and carries out processed, eventually form solid-state two water
Desulfurated plaster；
S7, washing: with the hot water of 85 DEG C-95 DEG C, two water desulfurated plasters are washed three times, then adding dehydrated alcohol termination instead
Should；
S8, it is dried: the Gypsum Fibrosum after washing is put into drying in oven 1-2h of 40 DEG C-55 DEG C, preserves in being then placed on exsiccator
Stand-by.
A kind of desulfurated plaster preparation method changing alkali based on farmland the most according to claim 1, it is characterised in that: described wadding
Solidifying agent is activated silica.
A kind of desulfurated plaster preparation method changing alkali based on farmland the most according to claim 1, it is characterised in that stir described in:
Mixing device is built-in single leaf agitator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610547030.3A CN106186031B (en) | 2016-07-12 | 2016-07-12 | A kind of desulfurated plaster preparation method for changing alkali based on farmland |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610547030.3A CN106186031B (en) | 2016-07-12 | 2016-07-12 | A kind of desulfurated plaster preparation method for changing alkali based on farmland |
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| Publication Number | Publication Date |
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| CN106186031A true CN106186031A (en) | 2016-12-07 |
| CN106186031B CN106186031B (en) | 2018-03-13 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101168852A (en) * | 2007-08-31 | 2008-04-30 | 武善东 | Mass production method for calcium sulfate whisker |
| CN101343077A (en) * | 2008-07-21 | 2009-01-14 | 广东南方碱业股份有限公司 | Method for preparing gypsum by removing boiler flue gas sulphur dioxide with white slime from ammonia alkali factory |
| CN102432211A (en) * | 2011-12-26 | 2012-05-02 | 浙江天蓝环保技术股份有限公司 | Method for preparing desulfurized gypsum |
| CN103964483A (en) * | 2014-04-25 | 2014-08-06 | 武汉大学 | Method for preparing high-strength gypsum by adopting atmospheric pressure solution method |
| CN105621776A (en) * | 2016-03-26 | 2016-06-01 | 王先宝 | Treatment method for coal boiler fuel gas wet desulfurization wastewater |
-
2016
- 2016-07-12 CN CN201610547030.3A patent/CN106186031B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101168852A (en) * | 2007-08-31 | 2008-04-30 | 武善东 | Mass production method for calcium sulfate whisker |
| CN101343077A (en) * | 2008-07-21 | 2009-01-14 | 广东南方碱业股份有限公司 | Method for preparing gypsum by removing boiler flue gas sulphur dioxide with white slime from ammonia alkali factory |
| CN102432211A (en) * | 2011-12-26 | 2012-05-02 | 浙江天蓝环保技术股份有限公司 | Method for preparing desulfurized gypsum |
| CN103964483A (en) * | 2014-04-25 | 2014-08-06 | 武汉大学 | Method for preparing high-strength gypsum by adopting atmospheric pressure solution method |
| CN105621776A (en) * | 2016-03-26 | 2016-06-01 | 王先宝 | Treatment method for coal boiler fuel gas wet desulfurization wastewater |
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| CN106186031B (en) | 2018-03-13 |
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Address after: 261108 800 Xiangjiang street, Binhai Economic Development Zone, Weifang, Shandong Patentee after: Shandong Sheng Wei salt alkali land Technology Co., Ltd. Address before: 261108 800 Xiangjiang street, Binhai Economic Development Zone, Weifang, Shandong Patentee before: Shandong Sunway Garden Technology Co., Ltd. |
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