CN103979586A - Magnesium nitrate, magnesium nitrate granulation equipment and magnesium nitrate production process - Google Patents
Magnesium nitrate, magnesium nitrate granulation equipment and magnesium nitrate production process Download PDFInfo
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- CN103979586A CN103979586A CN201410246361.4A CN201410246361A CN103979586A CN 103979586 A CN103979586 A CN 103979586A CN 201410246361 A CN201410246361 A CN 201410246361A CN 103979586 A CN103979586 A CN 103979586A
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- magnesium nitrate
- granulating equipment
- buffer tank
- cylindrical shell
- induced draft
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Abstract
The invention relates to magnesium nitrate which comprises a round or elliptic magnesium nitrate body, wherein recessed round holes are formed in the magnesium nitrate body. Magnesium nitrate is attractive in appearance, high in strength, good in flowability and unlikely to agglomerate. Magnesium nitrate granulation equipment comprises a barrel body, wherein a buffer tank and a draft fan are arranged at the upper part of the barrel body; a spraying head is arranged in the barrel body and is connected with the buffer tank. The equipment is high in automation level, low in investment cost, short in construction cycle, quick in production, small in area occupation and low in energy consumption. A magnesium nitrate production process is simple, and magnesium nitrate granules produced by adopting the process are attractive in appearance, high in strength, good in flowability and unlikely to agglomerate.
Description
Technical field
The present invention relates to a kind of magnesium nitrate, magnesium nitrate granulating equipment and production technique thereof.
Background technology
The prilling process of inorganic salt is a lot, but high tower prilling is one of most important method in numerous methods, except ammonium nitrate, saltpetre, urea and other compound fertilizer granulatings successfully adopt high tower prilling manufacture, high tower is to producing fertilizer Technology aspect, by practical application for many years, technology and equipment is all very ripe and perfect.But, because the cost of investment of high tower is higher, general all between 6,000,000-1,000 ten thousand, about 2 years construction periods, go into operation slow, and floor space is large.The magnesium nitrate that contains crystal water adopts that difficulty is larger in this way, and magnesium nitrate adopts the method for high tower prilling, just rests on word and imagination stage, is not applied for a long time and develops.
Existing magnesium nitrate product is the particle spherical products that contains six crystal water mostly, the production process of magnesium nitrate hexahydrate product, through the concentrated magnesium nitrate liquid that reaches crystallization standard, delivers to crystallizing pond or case, go crystallisation by cooling with separated, cannot carry out machinery and serialization and produce, energy consumption is high, efficiency is low, by de-liquid separation in centrifugal minute, does not reach thoroughly, become after little crystal fine grain, caking phenomenon is serious, and poor fluidity causes and uses difficulty large to user.
Summary of the invention
The problem to be solved in the present invention is for above problem, and a kind of magnesium nitrate product is provided, and this product appearance is beautiful, intensity is high, good fluidity, prevented from caking.
A kind of magnesium nitrate granulating equipment is provided, and this automation degree of equipment is high, cost of investment is low, the construction period is short, operation is fast, floor space is little, energy consumption is low.
A kind of magnesium nitrate production technique is provided, and this technique is simple, and the granules of magnesium nitrate outward appearance of explained hereafter is beautiful thus, intensity is high, good fluidity, prevented from caking.
For addressing the above problem, the technical solution adopted in the present invention is: a kind of magnesium nitrate, comprises and be shaped as circular or oval-shaped magnesium nitrate body to have spill circular hole on described magnesium nitrate body.
As a kind of prioritization scheme, described magnesium nitrate body presents translucent, and the diameter of magnesium nitrate body is 1.0-4.0mm.
This magnesium nitrate product appearance is beautiful, good fluidity, and intensity is high, and ultimate compression strength, more than 30N, is deposited and is not lumpd for three months.
A magnesium nitrate granulating equipment, comprises cylindrical shell, and the top on described cylindrical shell is provided with buffer tank and induced draft fan, and the inside of described cylindrical shell is provided with shower nozzle, and described shower nozzle is connected with buffer tank.
As a kind of prioritization scheme, the quantity of described induced draft fan is a plurality of, and a plurality of induced draft fans are along circumferentially uniform.
A concrete prioritization scheme, described induced draft fan is axial id fan.
As a kind of prioritization scheme, also comprise hold-up vessel, the first transferpump, the second transferpump and temperature control tank, described the first transferpump is connected with temperature control tank with hold-up vessel respectively, and described the second transferpump is connected with buffer tank by transfer lime.
As a kind of prioritization scheme, also comprise cooler, lift and sieve apparatus, described cooler is connected with lift with cylindrical shell respectively, and described lift is connected with sieve apparatus.
A concrete prioritization scheme, also comprises coating machine and wrapping machine, and the top of described wrapping machine is provided with warehouse, and described coating machine is connected with warehouse with sieve apparatus respectively.
As a kind of prioritization scheme, the bottom of described cylindrical shell is provided with hopper.
The problem that production cost that the magnesium nitrate industry that solved this magnesium nitrate granulating equipment perplexs enterprise is for many years high, technique can not serialization work, labour intensity is large, investment is large, the cycle is long, the gross investment of this magnesium nitrate granulating equipment is controlled between ten thousand yuan of 150-260,90 days construction periods, this magnesium nitrate granulating equipment is controlled under distribution state in computer can carry out the production of shrinkage pool granules of magnesium nitrate continuously, and level of automation is high, cost of investment is low, the construction period is short, operation is fast, floor space is little, energy consumption is low.
A production technique for magnesium nitrate, described production technique comprises the following steps:
By temperature, be that 80-110 ℃ of magnesium nitrate solution is delivered in the buffer tank on granulating equipment top;
Magnesium nitrate liquid self-flowing in buffer tank is to shower nozzle, by shower nozzle, magnesium nitrate solution is sprayed, the drop forming drops to bottom from top, open induced draft fan simultaneously, outside cold wind or normal temperature wind are flowed to top by bottom, drop and cold wind or normal temperature wind carry out heat exchange, form the particle with spill circular hole;
It is cooling that the granules of magnesium nitrate that falls into bottom is carried out secondary by cooler, and be 5-8 minute cooling time;
Cooled granules of magnesium nitrate is delivered in sieve apparatus and is sieved, and the diameter of screen of screening machine is 1.0-4.0mm.
Granules of magnesium nitrate after screening is delivered in coating machine, the white oil or the amine sheet that by coating machine, to the surface sprinkling mass concentration of granules of magnesium nitrate, are 1%-3%, both finished product.
This process using One-step production granules of magnesium nitrate with holes, technique is simple, the granules of magnesium nitrate outward appearance of explained hereafter is beautiful thus, intensity is high, good fluidity, prevented from caking, and this technique has solved the technical barrier of long-term puzzlement magnesium nitrate manufacturing enterprise completely, at present beyond example and report.
The present invention takes above technical scheme, have the following advantages: this patent adopts One-step production granules of magnesium nitrate with holes, technique is simple, product appearance is beautiful, intensity is high, good fluidity, prevented from caking, and granulating equipment level of automation is high, cost of investment is low, the construction period is short, operation is fast, floor space is little, energy consumption is low.
Below in conjunction with drawings and Examples, the invention will be further described.
accompanying drawing explanation
Accompanying drawing 1 is the structural representation of a kind of magnesium nitrate granulating equipment in the embodiment of the present invention;
Accompanying drawing 2 is the vertical view at accompanying drawing 1 middle cylinder body top;
Accompanying drawing 3 is the vertical view of accompanying drawing 1 middle cylinder body bottom;
Accompanying drawing 4 is the structural representation of shower nozzle in accompanying drawing 1;
Accompanying drawing 5 is the structural representation of magnesium nitrate in the embodiment of the present invention;
Accompanying drawing 6 is the structural representation of magnesium nitrate in the embodiment of the present invention.
Embodiment
Embodiment 1: as shown in accompanying drawing 5 and accompanying drawing 6, a kind of magnesium nitrate, comprises and be shaped as circular or oval-shaped magnesium nitrate body 22, on magnesium nitrate body 22, have spill circular hole 23, the mass percent of magnesium nitrate hexahydrate is 97%-99%.
Magnesium nitrate body 22 presents translucent, smooth surface, and the diameter of magnesium nitrate body is 1.0-4.0mm.
Embodiment 2: as shown in accompanying drawing 1, accompanying drawing 2, accompanying drawing 3 and accompanying drawing 4, a kind of magnesium nitrate granulating equipment, comprise cylindrical shell 12, the bottom of cylindrical shell 12 is provided with hopper 5, hopper 5 be shaped as taper, top on cylindrical shell 12 is provided with buffer tank 17 and induced draft fan 16, and the inside of cylindrical shell 12 is provided with shower nozzle 13, and shower nozzle 13 is connected with buffer tank 17.
The quantity of induced draft fan 16 is ten, and ten induced draft fans 16, along circumferentially uniform, can increase or reduce the quantity of induced draft fan 16 as required.
Induced draft fan 16 is axial id fan, and induced draft fan 16 is by induced exhaust 15 and sleeve 12 internal communication.
The top of cylindrical shell 12 is provided with service platform 14, and buffer tank 17, induced draft fan 16 and shower nozzle 13 are arranged on service platform 14.
By buffer tank 17, realize transition, filtration and the metering of magnesium nitrate solution.
On shower nozzle 13, be provided with several spray orifices 21, the diameter of spray orifice 21 is 2.5mm.
The outer setting of cylindrical shell 12 has cylindrical shell anchor 19 and outrigger anchor 20.
Also comprise hold-up vessel 1, the first transferpump 2, the second transferpump 3 and temperature control tank 4, the first transferpump 2 is connected with temperature control tank 4 with hold-up vessel 1 respectively by pipeline, the second transferpump 3 is connected with buffer tank 17 by transfer lime 18, and hold-up vessel 1, the first transferpump 2, the second transferpump 3 and temperature control tank 4 are positioned at the bottom of sleeve 12.
Also comprise cooler 6, lift 11 and sieve apparatus 10, cooler 6 is connected with lift 11 with cylindrical shell 12 respectively, lift 11 is connected with sieve apparatus 10, and the feed end of cooler 6 is connected with the hopper 5 of cylindrical shell 12 bottoms, and the discharge end of cooler 6 is connected with lift 11.
Lift 11 is chapelet, and sieve apparatus 10 is for being rock type or drum-type sieve apparatus, and cooler 6 is drum-type or fluid bed granulate cooler.
Also comprise coating machine 9 and wrapping machine 7, the top of wrapping machine 7 is provided with warehouse 8, and coating machine 9 is connected with warehouse 8 with sieve apparatus 10 respectively.
Embodiment 3: a kind of production technique of magnesium nitrate, and described production technique comprises the following steps:
By magnesium nitrate solution process enrichment process, and reach the standardized solution that need be sent to former periodic crystallisation technique, deliver to hold-up vessel 1, by the first transferpump 2, be delivered to temperature control tank 4 again, temperature is controlled to 80-110 ℃, by temperature, be that 80-110 ℃ of magnesium nitrate solution is delivered to by the second transferpump 3 in the buffer tank 17 on granulating equipment top, to be painted;
By buffer tank 17, measure and filter, magnesium nitrate liquid self-flowing in buffer tank 17 is to shower nozzle 13, by shower nozzle 13, magnesium nitrate solution is sprayed, forming drop of uniform size drops to bottom from top, open induced draft fan 16 simultaneously, outside cold wind or normal temperature wind are flowed to top by bottom, wind speed is 0.1-1m, drop in the process falling with revolve draw and on cold wind or normal temperature wind contact and carry out thermal exchange, by cold wind, take away the heat in particle, due in the process of thermal exchange, the rate of exchange of drop outside is higher than inner exchanging speed, when the later stage, internal heat leaked, form the spill circular hole of unique feature, the height of droplets fall is 30-46m,
It is cooling that the granules of magnesium nitrate that falls into bottom is carried out secondary by cooler 6, and be 5-8 minute cooling time, and cooler 6 is rotary drum or fluidized-bed cooler;
The cooling employing rotary drum of secondary or fluidized-bed process for cooling, by hopper 5, collected and the product that comes is delivered in rotary drum cooler by rotary conveyor or chapelet, rotary drum cooler inside is with special material delivering plate, head is used for increasing cooling air inducing amount and collects fine dust with cooling induced draft fan and dust chamber, particle magnesium nitrate is inner by the Wind Volume effect of cooling induced draft fan at rotary drum cooler, and under material delivering plate effect, particle is fully contacted with normal temperature cold wind and carry out thermal exchange.
Cooled granules of magnesium nitrate is delivered in sieve apparatus 10 and is sieved by lift 11, and the diameter of sieve apparatus 10 screen clothes is 1.0-4.0mm.
Granules of magnesium nitrate after screening is delivered in coating machine 9, the melt and dissolved anti-hard caking agent of heating that is 1%-3% to the surface sprinkling mass concentration of granules of magnesium nitrate by coating machine 9, anti-hard caking agent is optional with technical white oil or amine sheet, both finished product.
Utilizing the granular product of production technique production of the present invention and the crystallization magnesium nitrate product of original explained hereafter, under equal environment, store 60 days, there is not caking phenomenon in our final product, and former technique final product caking phenomenon is serious.
The band shrinkage pool granules of magnesium nitrate of preparing by revolving the cold magnesium nitrate granulating equipment of air inducing and technique, at different wind speed and shower nozzle speed conditions resulting product not, its processing parameter and performance see the following form:
| Example | Prilling tower height | Revolve air inducing speed (m/s) | Shower nozzle rotating speed | Finished product radius | Ultimate compression strength | Do not lump the time | Production capacity |
| 1 | 43/m | 0.5m/s | 56 turn | ? 2.3 | ＞30N | 60 days | 5 tons/time |
| 2 | 43/m | ?0.1m/s | 76 turn | ? 2 | ?＞30N | 60 days | 7 tons/time |
| 3 | ? 30/m | 0.5 m/s | 56 turn | ? 1.5 | ?＞30N | 60 days | 5 tons/time |
| 4 | ? 30/m | ? 1 m/s | 76 turn | ? 1 | ?＞30N | 60 days | 6 tons/time |
| 5 | ? 43/m | ?0.8 m/s | 60 turn | ? 2 | ?＞30N | 60 days | 8 tons/time |
The band shrinkage pool granules of magnesium nitrate of preparing by revolving the cold magnesium nitrate granulating equipment of air inducing and technique, under the condition of different coating agent consumptions, resulting product does not lump the time, and its processing parameter and performance see the following form:
| Example | Surface-coating agent title | Membrane wrapping thickness | Coating agent content % | Do not lump the time |
| 1 | White oil 1: amine sheet 2 | 0.2 | 2 | > 30 days |
| 2 | White oil 2: amine sheet 1 | 0.2 | 2 | > 30 days |
| 3 | White oil 1: amine sheet 2 | 0.3 | 2 | > 30 days |
| 4 | White oil 2: amine sheet 1 | 0.4 | 2 | > 30 days |
| 5 | White oil 2: amine sheet 1 | 0.5 | 2 | > 30 days |
Claims (10)
1. a magnesium nitrate, comprises and is shaped as circular or oval-shaped magnesium nitrate body (22), it is characterized in that: on described magnesium nitrate body, have spill circular hole (23).
2. a kind of magnesium nitrate as claimed in claim 1, is characterized in that: described magnesium nitrate body (22) presents translucent, and the diameter of magnesium nitrate body (22) is 1.0-4.0mm.
3. a magnesium nitrate granulating equipment, comprise cylindrical shell (12), it is characterized in that: the top on described cylindrical shell (12) is provided with buffer tank (17) and induced draft fan (16), and the inside of described cylindrical shell (12) is provided with shower nozzle (13), described shower nozzle (13) is connected with buffer tank (17).
4. a kind of magnesium nitrate granulating equipment as claimed in claim 3, is characterized in that: the quantity of described induced draft fan (16) is a plurality of, and a plurality of induced draft fans (16) are along circumferentially uniform.
5. a kind of magnesium nitrate granulating equipment as claimed in claim 3, is characterized in that: described induced draft fan (16) is axial id fan.
6. as a kind of magnesium nitrate granulating equipment of claim 3-5 as described in one of them, it is characterized in that: also comprise hold-up vessel (1), the first transferpump (2), the second transferpump (3) and temperature control tank (4), described the first transferpump (2) is connected with temperature control tank (4) with hold-up vessel (1) respectively, and described the second transferpump (3) is connected with buffer tank (17) by transfer lime (18).
7. as a kind of magnesium nitrate granulating equipment of claim 3-5 as described in one of them, it is characterized in that: also comprise cooler (6), lift (11) and sieve apparatus (10), described cooler (6) is connected with lift (11) with cylindrical shell (12) respectively, and described lift (11) is connected with sieve apparatus (10).
8. a kind of magnesium nitrate granulating equipment as claimed in claim 7, it is characterized in that: also comprise coating machine (9) and wrapping machine (7), the top of described wrapping machine (7) is provided with warehouse (8), and described coating machine (9) is connected with warehouse (8) with sieve apparatus (10) respectively.
9. as a kind of magnesium nitrate granulating equipment of claim 3-5 as described in one of them, it is characterized in that: the bottom of described cylindrical shell (12) is provided with hopper (5).
10. a production technique for magnesium nitrate, is characterized in that: described production technique comprises the following steps:
By temperature, be that 80-110 ℃ of magnesium nitrate solution is delivered in the buffer tank (17) on granulating equipment top;
Magnesium nitrate liquid self-flowing in buffer tank (17) is to shower nozzle (13), by shower nozzle (13), magnesium nitrate solution is sprayed, the drop forming drops to bottom from top, open induced draft fan (16) simultaneously, outside cold wind or normal temperature wind are flowed to top by bottom, drop and cold wind or normal temperature wind carry out heat exchange, form the particle with spill circular hole;
It is cooling that the granules of magnesium nitrate that falls into bottom is carried out secondary by cooler (6), and be 5-8 minute cooling time;
Cooled granules of magnesium nitrate is delivered in sieve apparatus (10) and is sieved, and the diameter of sieve apparatus (10) screen cloth is 1.0-4.0mm;
Granules of magnesium nitrate after screening is delivered in coating machine (9), the white oil or the amine sheet that by coating machine (9), to the surface sprinkling mass concentration of granules of magnesium nitrate, are 1%-3%, both finished product.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201410246361.4A CN103979586A (en) | 2014-06-05 | 2014-06-05 | Magnesium nitrate, magnesium nitrate granulation equipment and magnesium nitrate production process |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410246361.4A CN103979586A (en) | 2014-06-05 | 2014-06-05 | Magnesium nitrate, magnesium nitrate granulation equipment and magnesium nitrate production process |
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| CN201410246361.4A Pending CN103979586A (en) | 2014-06-05 | 2014-06-05 | Magnesium nitrate, magnesium nitrate granulation equipment and magnesium nitrate production process |
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Cited By (5)
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| CN105502692A (en) * | 2015-11-30 | 2016-04-20 | 西安建筑科技大学 | Fluidized bed water treatment device realizing chemical crystallization circulating granulation |
| CN105880147A (en) * | 2014-11-13 | 2016-08-24 | 吕庆民 | Integrated screening cooling wrapping machine |
| CN106830021A (en) * | 2017-03-20 | 2017-06-13 | 青海盐湖工业股份有限公司 | A kind of preparation technology of magnesium nitrate hexahydrate |
| CN110668847A (en) * | 2019-11-04 | 2020-01-10 | 山西华鑫肥业股份有限公司 | Production method of large-particle magnesium nitrate |
| CN115155455A (en) * | 2022-07-05 | 2022-10-11 | 山西东锦肥业有限公司 | Device for preventing magnesium nitrate granule wall built-up |
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| CN202465548U (en) * | 2012-03-10 | 2012-10-03 | 河北冀衡赛瑞化工有限公司 | Cooling and conveying system for compound fertilizer produced through granulation of high tower |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105880147A (en) * | 2014-11-13 | 2016-08-24 | 吕庆民 | Integrated screening cooling wrapping machine |
| CN105502692A (en) * | 2015-11-30 | 2016-04-20 | 西安建筑科技大学 | Fluidized bed water treatment device realizing chemical crystallization circulating granulation |
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| CN115155455A (en) * | 2022-07-05 | 2022-10-11 | 山西东锦肥业有限公司 | Device for preventing magnesium nitrate granule wall built-up |
| CN115155455B (en) * | 2022-07-05 | 2024-04-26 | 山西东锦肥业有限公司 | Device for preventing magnesium nitrate particles from hanging on wall |
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Application publication date: 20140813 |