CN101698621A - Dehumidifying and cooling method in producing high-tower granulation urea-based compound fertilizer - Google Patents
Dehumidifying and cooling method in producing high-tower granulation urea-based compound fertilizer Download PDFInfo
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- CN101698621A CN101698621A CN200910309697A CN200910309697A CN101698621A CN 101698621 A CN101698621 A CN 101698621A CN 200910309697 A CN200910309697 A CN 200910309697A CN 200910309697 A CN200910309697 A CN 200910309697A CN 101698621 A CN101698621 A CN 101698621A
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Abstract
The invention discloses a dehumidifying and cooling method in producing high-tower granulation urea-based compound fertilizer, comprising the following steps: 1) material leaving a tower is sent into a microwave dryer or a roller dryer by a hoister to be heated to 80-90 DEG C, and material moisture is lowered to 0.6-0.8%; 2) material with the moisture content being 0.6-0.8% is sent into a totally-closed sieving machine to be sieved; 3) sieved material is put in a roller cooler or a vibration fluidized bed cooler to be cooled to 32-39 DEG C; and 4) material cooled in step 3 is packaged into a product after surface conditioning. When used for producing high-tower granulation urea-based compound fertilizer, the method of the invention can remove moisture in materials, so that no blocking phenomenon appears to the product when produced in high-temperature seasons, thus greatly improving product quality, preventing the product from using anti-blocking agent during storage and transportation processes, thoroughly solving the quality problems of product blocking and further improving the using effect of the product.
Description
Technical field
The present invention relates to the production method of composite fertilizer, is a kind of dehumidifying and cooling method that high-tower granulation urea-based compound fertilizer is produced that is used for.
Background technology
The product quality problem that is prone to most in the high-tower granulation urea-based compound fertilizer production technology lumps exactly, and at when screening stifled sieve etc., discover that the cooling process operation in this technology is bigger to the influence of quality product, when the summer environment temperature about 35 ℃, relative humidity was greater than 80% o'clock, easily cause the product water content higher, make the product caking, particularly still continue about 55 ℃ through the product temperature after the cooling cylinder cooling process in the production technique, further aggravated the degree of agglomeration of product, for this reason, those skilled in the art once added amendment such as diatomite and attempted to change this situation in the finished product treating processes.But the effect of this method is not good enough, and therefore, the product in the production of high tower prilling machine urea-based compound fertilizer easily lumps, and the problem of stifled sieve is solved so far preferably aborning.
Summary of the invention
The objective of the invention is, a kind of dehumidifying and cooling method that high-tower granulation urea-based compound fertilizer is produced that is used for is provided, it can solve the problem that product easily lumps in the existing high-tower granulation urea-based compound fertilizer production, thereby has improved quality product.
The present invention is achieved through the following technical solutions for achieving the above object: be used for the dehumidifying and cooling method that high-tower granulation urea-based compound fertilizer is produced, may further comprise the steps:
1. will go out the tower material and be sent into by lift and be heated to 80 ℃-90 ℃ in microwave dryer or the roller dryer, material contained humidity evaporation back enters atmosphere by induced draft fan, makes material moisture reduce to 0.6%-0.8%;
2. water content is sent into the screening of totally enclosed sieve apparatus at the material of 0.6%-0.8%;
3. the material after screening is inserted cylinder cooler or vibrated fluidized bed cooler internal cooling to 32 ℃-39 ℃ again, its process of cooling is to feed cold dry air to cylinder cooler or vibrated fluidized bed cooler, the temperature of cold dry air is 18 ℃-25 ℃, relative humidity≤60%, cold dry air is inputed in the water cooler by dehydrating unit, dehydrating unit is by atmospheric condenser, gas-liquid separator and airheater are formed, enter atmospheric condenser after outside air filters and be cooled to 1 ℃-5 ℃, entering gas-liquid separator after air is condensed falls the liquid condensation water sepn, air is heated to 18 ℃-25 ℃ by airheater then, relative humidity is 60%, described atmospheric condenser, gas-liquid separator and airheater adopt pipeline to interconnect;
4. will carry out being packaged into product after the conditioning of surface through the 3. cooled material of step.
Describedly be used for the dehumidifying and cooling method that high-tower granulation urea-based compound fertilizer is produced, feed 18 ℃ of-25 ℃ of cold dry airs when the screening of step described in 2., the weight ratio of material and cold dry air is 1: 1.2-1.5.
Describedly be used for the dehumidifying and cooling method that high-tower granulation urea-based compound fertilizer is produced, the cold dry air that to cooler in feed of step described in 3. and the weight ratio of material are: 1.8-2: 1.
The invention has the advantages that: employing method of the present invention can be removed the moisture in the material in high-tower granulation urea-based compound fertilizer production, make product caking phenomenon can not occur in high temperature season production, thereby increased substantially quality product, make product in transporting procedures, not need to use anti-hard caking agent, thoroughly solve the quality problems of product caking, thereby further improved the result of use of product.The further effect of method of the present invention is, do not occur stifled sieve, sticking sieve phenomenon in the production process, increased substantially production efficiency.
Embodiment
Embodiment
The dehumidifying and cooling method that uses in high-tower granulation urea-based compound fertilizer production of the present invention is with the cooling that dehumidifies under totally-enclosed situation of the material after going out tower, making material contain moisture reduces to below 0.8%, entering the preceding temperature of charge of product surface conditioning packing is below 40 ℃, mainly solve the quality problems that product easily lumps in the high-tower granulation urea-based compound fertilizer production, solve the sticking sieve that is prone in producing, stifled sieve phenomenon simultaneously, thereby the problem that often needs the cleaning sieve apparatus in avoiding producing, enhance productivity, improve the quality of products.The inventive method is applicable to about 30 ℃-42 ℃ of envrionment temperatures, relative humidity 〉=60%.
Below dehumidifying and cooling method of the present invention is further specified:
Method one:
1. 65 ℃ the tower material that goes out is sent into by lift and is heated to 85 ℃-90 ℃ in the microwave dryer, material is to travel forward under the drive of the special-purpose conveyor of microwave in microwave dryer, when stopping 50-60 temperature of charge rising to 80 ℃-90 ℃ after second, contained humidity is then reduced to 0.7%-0.8%, enters atmosphere by induced draft fan after the moisture evaporation;
2. send into totally-enclosed sieve apparatus at the material of 0.7%-0.8% by lift through the 1. dry back of step water content material is sieved, sieve according to processing requirement and remove macrobead, small-particle and fine powder;
3. the material after will sieving is inserted in the cylinder cooler, feed cold dry air to the cylinder cooler, make material be cooled to 36 ℃, concrete process of cooling is: feeding the cold dry air temperature in the cylinder cooler is 25 ℃, relative humidity is 60%, the weight ratio of material and cold dry air is 1: 1.8, the temperature of charge of cylinder cooler outlet is 36 ℃, outlet tail gas enters atmosphere after treatment, the described cold dry air that feeds in the cylinder cooler derives from dehydrating unit, dehydrating unit is by atmospheric condenser, gas-liquid separator and airheater are formed, enter atmospheric condenser after outside air filters and be cooled to 2 ℃-5 ℃, enter gas-liquid separator after air is condensed, and then the liquid condensation water sepn is fallen, air is heated to 25 ℃ by airheater again, and relative humidity is 60%; Described atmospheric condenser, gas-liquid separator and airheater adopt pipeline to interconnect;
4. will carry out being packaged into product after the conditioning of surface through the 3. cooled material of step.
Method two:
1. 65 ℃ the tower material that goes out is sent in the roller dryer by lift, material is taken up repeatedly in roller dryer and is fallen, stopped 25-30 minute, simultaneously, airheater is sent into 120 ℃ warm air in the roller dryer, carries out sufficient heat exchange with material, the weight ratio of material and warm air is 1: 1.2, the temperature of charge of roller dryer outlet is 80 ℃, and water content is 0.6%, enters atmosphere by induced draft fan after the moisture evaporation;
2. water content is sent into totally-enclosed sieve apparatus screening at 0.6% material, remove macrobead, small-particle and fine powder according to the processing requirement sieve;
3. insert vibrated fluidized bed cooler internal cooling through the material after the screening, feed cold dry air to the vibrated fluidized bed cooler, the temperature of cold dry air is 18 ℃, relative humidity is 60%, material forms fluidized along the sieve plate vergence direction and travels forward under the acting in conjunction of vibration and cold dry air, stopped 25 minutes, with the cold dry air sufficient heat exchange, the weight ratio of material and cold dry air is 1: 2, the temperature of charge of vibrated fluidized bed cooler outlet is 33 ℃, outlet tail gas enters atmosphere after treatment, concrete process of cooling is: cold dry air is by in the dehydrating unit inputted vibration fluidized-bed cooler, dehydrating unit is by atmospheric condenser, gas-liquid separator and airheater are formed, enter atmospheric condenser after outside air filters and be cooled to 1 ℃-3 ℃, enter gas-liquid separator after air is condensed, and then the liquid condensation water sepn is fallen, last air is heated to 18 ℃ by airheater, and relative humidity is 60%; Described atmospheric condenser, gas-liquid separator and airheater adopt pipeline to interconnect;
4. will carry out being packaged into product after the conditioning of surface through the 3. cooled material of step.
In order to reach further purpose of the present invention, material is better cooled off, when screening, do not produce stifled sieve or sticking sieve, when the screening described in 2. of the step of the inventive method, can feed cold dry air to totally-enclosed sieve apparatus, the temperature of cold dry air is 18 ℃-25 ℃, relative humidity≤60%, the weight ratio of material and cold dry air is 1: 1.2-1.5,1: any one numerical value among the 1.2-1.5 all can.Cold dry air comes from dehydrating unit, and dehydrating unit and the step dehydrating unit described in 3. is identical.The outlet of airheater is connected with totally-enclosed sieve apparatus by pipeline, and cold dry air is cooled off material.
It is to guarantee the material cooling that can dehumidify under closed state that atmospheric condenser in the dehydrating unit of the present invention, gas-liquid separator and airheater adopt the interconnective purpose of pipeline, dehydrating unit to totally-enclosed sieve apparatus input cold dry air, is imported cold dry air by pipeline to cylinder cooler or vibrated fluidized bed cooler by pipeline.
The all devices such as totally-enclosed sieve apparatus, atmospheric condenser, gas-liquid separator, airheater and lift that use in the present invention's cooling are known configurations.
Microwave dryer described in the inventive method or roller dryer also can adopt Vibratingfluidbeddrier to substitute.
Claims (3)
1. be used for the dehumidifying and cooling method that high-tower granulation urea-based compound fertilizer is produced, it is characterized in that: may further comprise the steps:
1. will go out the tower material and be sent into by lift and be heated to 80 ℃-90 ℃ in microwave dryer or the roller dryer, material contained humidity evaporation back enters atmosphere by induced draft fan, makes material moisture reduce to 0.6%-0.8%;
2. water content is sent into the screening of totally enclosed sieve apparatus at the material of 0.6%-0.8%;
3. the material after screening is inserted cylinder cooler or vibrated fluidized bed cooler internal cooling to 32 ℃-39 ℃ again, its process of cooling is to feed cold dry air to cylinder cooler or vibrated fluidized bed cooler, the temperature of cold dry air is 18 ℃-25 ℃, relative humidity≤60%, cold dry air is inputed in the water cooler by dehydrating unit, dehydrating unit is by atmospheric condenser, gas-liquid separator and airheater are formed, enter atmospheric condenser after outside air filters and be cooled to 1 ℃-5 ℃, entering gas-liquid separator after air is condensed falls the liquid condensation water sepn, air is heated to 18 ℃-25 ℃ by airheater then, relative humidity is 60%, described atmospheric condenser, gas-liquid separator and airheater adopt pipeline to interconnect;
4. will carry out being packaged into product after the conditioning of surface through the 3. cooled material of step.
2. according to claim 1ly be used for the dehumidifying and cooling method that high-tower granulation urea-based compound fertilizer is produced, it is characterized in that: feed 18 ℃ of-25 ℃ of cold dry airs when the screening of step described in 2., the weight ratio of material and cold dry air is 1: 1.2-1.5.
3. according to claim 1ly be used for the dehumidifying and cooling method that high-tower granulation urea-based compound fertilizer is produced, it is characterized in that: the cold dry air that to cooler in feed of step described in 3. and the weight ratio of material are: 1.8-2: 1.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910309697XA CN101698621B (en) | 2009-06-01 | 2009-11-13 | Dehumidifying and cooling method in producing high-tower granulation urea-based compound fertilizer |
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| Application Number | Priority Date | Filing Date | Title |
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| CN200910015731.2 | 2009-06-01 | ||
| CN200910015731 | 2009-06-01 | ||
| CN200910309697XA CN101698621B (en) | 2009-06-01 | 2009-11-13 | Dehumidifying and cooling method in producing high-tower granulation urea-based compound fertilizer |
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| CN101698621A true CN101698621A (en) | 2010-04-28 |
| CN101698621B CN101698621B (en) | 2012-04-18 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102503738A (en) * | 2011-09-23 | 2012-06-20 | 贵州凤冈净宇生物科技有限公司 | Fertilizer granulation and baking method |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2797365Y (en) * | 2004-03-20 | 2006-07-19 | 合加资源发展股份有限公司 | System for refining garbage fermented product |
| CN1709838A (en) * | 2005-07-06 | 2005-12-21 | 周建军 | Powder treating process for producing high-concentration compound azophoska fertilizer by tower granulation |
| CN101303146B (en) * | 2008-01-24 | 2010-06-02 | 郑州阿波罗肥业有限公司 | Air cooling process for cooling high tower granulation fertilizer |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102503738A (en) * | 2011-09-23 | 2012-06-20 | 贵州凤冈净宇生物科技有限公司 | Fertilizer granulation and baking method |
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| CN101698621B (en) | 2012-04-18 |
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