CN107497258A - A kind of Quick lime desiccant and preparation method thereof - Google Patents
A kind of Quick lime desiccant and preparation method thereof Download PDFInfo
- Publication number
- CN107497258A CN107497258A CN201710923092.4A CN201710923092A CN107497258A CN 107497258 A CN107497258 A CN 107497258A CN 201710923092 A CN201710923092 A CN 201710923092A CN 107497258 A CN107497258 A CN 107497258A
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- China
- Prior art keywords
- quick lime
- nano imvite
- ptpp
- desiccant
- quicklime particles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/26—Drying gases or vapours
- B01D53/28—Selection of materials for use as drying agents
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
- Drying Of Gases (AREA)
Abstract
A kind of Quick lime desiccant, described Quick lime desiccant are mixed by nano imvite, PTPP, hydrated SiO 2 and quicklime particles, and the weight/mass percentage composition of each component is respectively in Quick lime desiccant：Nano imvite 0.1 0.3%, PTPP 0.5 1%, hydrated SiO 23 8%, remaining is quicklime particles.The 3mm of quicklime particles particle diameter 2.The 30nm of grain diameter 20 of the nano imvite, and be modified through peracid.The preparation method comprises the following steps：(1) crush；(2) clean；(3) filtration, purification；(4) fire；(5) discharging crushes；(6) it is hybrid packed.Gained lime stone drier simple production process of the invention, cost is cheap, is adapted to large-scale industrial production, and drier can be made to keep powdered during water suction is dried, and does not lump, drying effect is good.
Description
Technical field
The present invention relates to a kind of drier, specifically a kind of Quick lime desiccant and preparation method thereof.
Background technology
Quick lime is typically used for always for a long time by limestone calcination, quick lime because of its excellent water absorbing properties
Drier is made, the main component of Quick lime desiccant is calcium oxide, and drying principles are that calcium oxide water absorption reaction generates hydroxide
Calcium, because its cost is cheap, cost performance is high etc., characteristic is widely used in the industry-by-industries such as food, clothes.
Quick lime is then to be calcined to form in limekiln by the building stones containing a large amount of calcium carbonate such as lime stone, marble,
During use, the calcium hydroxide of calcium oxide water suction generation, absorption can be deposited in quick lime table by decomposing the calcium carbonate of generation afterwards
Face, influence moisture by, that is, influence quick lime further absorb moisture, so as to limit its play drier effect.
The content of the invention
It is an object of the invention to provide a kind of new Quick lime desiccant, using effect is good, cost is cheap, prevented from caking,
And provide its preparation method.
To achieve these goals, the present invention takes following technical scheme：
A kind of Quick lime desiccant, described Quick lime desiccant are by nano imvite, PTPP, hydration dioxy
SiClx and quicklime particles mix, and the weight/mass percentage composition of each component is respectively in Quick lime desiccant：Nanometer is covered de-
Native 0.1-0.3%, PTPP 0.5-1%, hydrated SiO 2 3-8%, remaining is quicklime particles.
The present invention is uniformly blended into nano imvite, PTPP and hydration before packing using quick lime as main component
Silica, when playing a role, calcium carbonate surface caused by lime stone water suction coats one layer of nano imvite, because nanometer is covered
De- penus has very strong adsorption capacity, therefore hydrated SiO 2 can utilize the reaction institute for generating calcium carbonate in layer structure
Caused heat enters the interlayer of nano imvite, the entrance of quicklime particles is obstructed, so as to ensure quicklime particles and carbonic acid
There is certain interval between calcium particle, meanwhile, PTPP water suction gradually hydrolysis generation orthophosphates, PTPP can have
The ability of good complexation of metal ions, the complex compound of solubility is generated, foreign metal ion is uniformly distributed, does not produce caking
Phenomenon.
Further, the quicklime particles particle diameter 2-3mm, less grain diameter can increase and air contact area,
Play more preferable drying effect.
Further, the grain diameter 20-30nm of nano imvite, and be modified through peracid.Simple acid modification is mainly
With sulfuric acid, hydrochloric acid, phosphoric acid or their mixing acid elution or certain time will be heated added with the montmorillonite suspension liquid of acid, pass through acid
Change the specific surface area increase of modified montmorillonite, aperture also increases, and has stronger adsorptivity and chemism, has very
High absorption property, it is a kind of extraordinary mesoporous support material.
Meanwhile the present invention provides a kind of method for preparing Quick lime desiccant, comprises the following steps：
(1) crush：With impact crusher by limestone crushing to particle diameter 20-50mm, during subsequent calcination, stone
Lime stone is excessive or the too small content that can all influence calcium oxide, makes its content relatively low, influences drying effect, therefore, the present invention will
Seek unification limestone particle size size, ensure subsequent calcination processing efficient, high quality.
(2) clean：Limestone block is rinsed with clear water mainly in rotating cylinder stone scrubber, removes mixed impurity and lime stone
Dust, avoid producing dross phenomenon in calcining.
(3) filtration, purification：Raw limestone is filtered with reciprocating sieve, makes its uniform particle sizes, preferably mixing, removes particle diameter mistake
Big, ensure burning quality.Meanwhile absolute ethyl alcohol is sprayed, one layer of filthy water film that limestone surfaces leave when cleaning previous step.
(4) fire：Preheating is first passed through, kiln temperature is risen to 900-1000 DEG C, after preheating fully, temperature risen to
1050-1150 DEG C is fired, Slow cooling after calcining completely in four hours.Anthracite, particle diameter are used in calcination process
0.08mm, less anthracite granule size can increase gas-solid and be in contact area, and anthracite feature density is big, and phosphorus content is high, ash content
Few, sulfur content is low, and caloric value is big, about 29308KJ/kg, while increases oxygen content in its rotary kiln using air blower.
(5) discharging crushes：Discharged at 110-130 DEG C, then quick lime feed powder is broken to 2-3mm, now particle size is fitted
Close, the big drying effect of specific surface area is good.
(6) it is hybrid packed：In dry conditions, by the good quick lime powder of flour and nano imvite, PTPP,
Hydrated SiO 2 is sufficiently mixed, and each component is by weight proportion：Nano imvite 0.1-0.3%, PTPP 0.5-
1%th, hydrated SiO 2 3-8%, remaining is quicklime particles.
Gained lime stone drier simple production process of the invention, cost is cheap, is adapted to large-scale industrial production, and can be
Drier is kept powdered during drying water suction, do not lump, drying effect is good.
Brief description of the drawings
Fig. 1 is the specific steps flow chart of the present invention.
Embodiment
The present invention is described in further detail with reference to embodiment.It should be appreciated that the implementation of the present invention is simultaneously
Do not limit to the following examples, any formal accommodation or change made to the present invention fall within the protection model of the present invention
Enclose.
Embodiment 1：
(1) crush：With impact crusher by limestone crushing to particle diameter 20mm；
(2) clean：Limestone block is rinsed with clear water, removes mixed impurity and lime stone dust；
(3) filtration, purification：Raw limestone is filtered, ensures burning quality.Spray absolute ethyl alcohol simultaneously, lime stone during cleaning
The filthy water film on surface；
(4) fire：First preheat, temperature rises to 900 DEG C, after preheating fully, temperature is risen into 1050 DEG C and is fired, four is small
When calcining completely after Slow cooling；
(5) discharging crushes：Discharged at 110 DEG C, then quick lime feed powder is broken to 2mm, now particle size is adapted to, and compares table
The big drying effect of area is good；
(6) it is hybrid packed：In dry conditions, by the good quick lime powder of flour and nano imvite, PTPP,
Hydrated SiO 2 is sufficiently mixed, and each component is by weight proportion：Nano imvite 0.1%, PTPP 0.5%, hydration
Silica 3%, remaining is quicklime particles.
Embodiment 2：
(1) crush：With impact crusher by limestone crushing to particle diameter 40mm；
(2) clean：Limestone block is rinsed with clear water, removes mixed impurity and lime stone dust；
(3) filtration, purification：Raw limestone is filtered, ensures burning quality.Spray absolute ethyl alcohol simultaneously, lime stone during cleaning
The filthy water film on surface；
(4) fire：First preheat, temperature rises to 950 DEG C, after preheating fully, temperature is risen into 1100 DEG C and is fired, four is small
When calcining completely after Slow cooling；
(5) discharging crushes：Discharged at 120 DEG C, then quick lime feed powder is broken to 2mm, now particle size is adapted to, and compares table
The big drying effect of area is good；
(6) it is hybrid packed：In dry conditions, by the good quick lime powder of flour and nano imvite, PTPP,
Hydrated SiO 2 is sufficiently mixed, and each component is by weight proportion：Nano imvite 0.2%, PTPP 0.7%, hydration
Silica 5%, remaining is quicklime particles.
Embodiment 3：
(1) crush：With impact crusher by limestone crushing to particle diameter 50mm；
(2) clean：Limestone block is rinsed with clear water, removes mixed impurity and lime stone dust；
(3) filtration, purification：Raw limestone is filtered, ensures burning quality.Spray absolute ethyl alcohol simultaneously, lime stone during cleaning
The filthy water film on surface；
(4) fire：First preheating, temperature rises to 1000 DEG C, after preheating fully, temperature is risen into 1150 DEG C and is fired, and four
Slow cooling after hour calcining completely；
(5) discharging crushes：Discharged at 130 DEG C, then quick lime feed powder is broken to 3mm, now particle size is adapted to, and compares table
The big drying effect of area is good；
(6) it is hybrid packed：In dry conditions, by the good quick lime powder of flour and nano imvite, PTPP,
Hydrated SiO 2 is sufficiently mixed, and each component is by weight proportion：Nano imvite 0.3%, PTPP 1%, hydration two
Silica 8%, remaining is quicklime particles.
Claims (4)
- A kind of 1. Quick lime desiccant, it is characterised in that：Described Quick lime desiccant is by nano imvite, tripolyphosphate Potassium, hydrated SiO 2 and quicklime particles mix, the weight/mass percentage composition difference of each component in Quick lime desiccant For：Nano imvite 0.1-0.3%, PTPP 0.5-1%, hydrated SiO 2 3-8%, remaining is quicklime particles.
- A kind of 2. Quick lime desiccant according to claim 1, it is characterised in that：The quicklime particles particle diameter 2- 3mm。
- A kind of 3. Quick lime desiccant according to claim 1 or 2, it is characterised in that：The particle of the nano imvite Particle diameter 20-30nm, and be modified through peracid.
- A kind of 4. preparation method of Quick lime desiccant as claimed in claim 1, it is characterised in that：The preparation method includes Following steps：(1) crush：With impact crusher by limestone crushing to particle diameter 20-50mm；(2) clean：Limestone block is rinsed with clear water, removes mixed impurity and lime stone dust；(3) filtration, purification：Raw limestone is filtered, ensures burning quality, while sprays absolute ethyl alcohol, limestone surfaces during cleaning Filthy water film；(4) fire：First preheat, temperature rises to 900-1000 DEG C, after preheating fully, temperature is risen into 1050-1150 DEG C and burnt System, Slow cooling after calcining completely in four hours；(5) discharging crushes：Discharged at 110-130 DEG C, then quick lime feed powder is broken to 2-3mm, now particle size is adapted to, than The big drying effect of surface area is good；(6) it is hybrid packed：In dry conditions, by the good quick lime powder of flour and nano imvite, PTPP, hydration Silica is sufficiently mixed, and each component is by weight proportion：Nano imvite 0.1-0.3%, PTPP 0.5-1%, water Silica 3-8% is closed, remaining is quicklime particles.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710923092.4A CN107497258A (en) | 2017-09-30 | 2017-09-30 | A kind of Quick lime desiccant and preparation method thereof |
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| CN201710923092.4A CN107497258A (en) | 2017-09-30 | 2017-09-30 | A kind of Quick lime desiccant and preparation method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110756154A (en) * | 2018-07-26 | 2020-02-07 | 桐庐巴特斯科技有限公司 | Calcium oxide desiccant with geometric shape and preparation method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101628221A (en) * | 2008-07-15 | 2010-01-20 | 郑州天祥无机材料有限公司 | Spherical calcium oxide adsorbent and preparation method thereof |
| CN103055665A (en) * | 2012-07-31 | 2013-04-24 | 建德市宏兴钙业有限责任公司 | Quick lime desiccant and production process thereof |
| CN103331081A (en) * | 2013-07-11 | 2013-10-02 | 南京工业大学 | Drying agent for air separation oxygen production and preparation method |
-
2017
- 2017-09-30 CN CN201710923092.4A patent/CN107497258A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101628221A (en) * | 2008-07-15 | 2010-01-20 | 郑州天祥无机材料有限公司 | Spherical calcium oxide adsorbent and preparation method thereof |
| CN103055665A (en) * | 2012-07-31 | 2013-04-24 | 建德市宏兴钙业有限责任公司 | Quick lime desiccant and production process thereof |
| CN103331081A (en) * | 2013-07-11 | 2013-10-02 | 南京工业大学 | Drying agent for air separation oxygen production and preparation method |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110756154A (en) * | 2018-07-26 | 2020-02-07 | 桐庐巴特斯科技有限公司 | Calcium oxide desiccant with geometric shape and preparation method thereof |
| CN110756154B (en) * | 2018-07-26 | 2022-08-26 | 杭州远烨新材料有限公司 | Calcium oxide desiccant with geometric shape and preparation method thereof |
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