CN109503215A - Biuret Content control method and its use device in complex fertilizer - Google Patents
Biuret Content control method and its use device in complex fertilizer Download PDFInfo
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- CN109503215A CN109503215A CN201811300724.2A CN201811300724A CN109503215A CN 109503215 A CN109503215 A CN 109503215A CN 201811300724 A CN201811300724 A CN 201811300724A CN 109503215 A CN109503215 A CN 109503215A
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- biuret
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- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05C—NITROGENOUS FERTILISERS
- C05C9/00—Fertilisers containing urea or urea compounds
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Abstract
The invention discloses Biuret Content control methods in a kind of complex fertilizer, it is delivered in fusion tank the following steps are included: auxiliary material and urea are passed through conveying equipment by (1) respectively, molten liquid is formed at a temperature of 120~130 DEG C, auxiliary material includes one or more of in chlorate class compound or ammonium salt compounds；(2) molten liquid in fusion tank is stirred using agitating device, mixing time is 5~15min；(3) molten liquid is discharged from the overflow port of fusion tank.The present invention controls the temperature of urea melting at 120~130 DEG C, on the one hand can both ensure that urea can melt completely, on the other hand avoids urea melting liquid that condensation reaction occurs at relatively high temperatures, generates biuret, reduces the quality of complex fertilizer；When urea melting, i.e., add auxiliary material, chlorination salt compound or ammonium salt compounds in fusing urea, can reduce the temperature of urea melting, reduce because temperature it is excessively high caused by biuret production rate.
Description
Technical field
The present invention relates to a kind of Biuret Content control method, in particular to Biuret Content controls in a kind of complex fertilizer
Method and its use device.
Background technique
Complex fertilizer can provide comprehensive nutrient to crop and be widely used in agricultural production.Existing more advanced
In complex fertilizer production technology, urea is because its nitrogen content is high, output is big, often by as production high concentration compound fertilizer or height
The most important nitrogen source of nitrogenous fertilizer material.But in complex fertilizer manufacturing process, urea exists as the nitrogen source of the raw material of production complex fertilizer
Melting, be granulated and drying process in, since the temperature of a certain period is excessively high, cause two molecule urea condensation denitrogenations at biuret,
To make the biuret in complex fertilizer containing higher concentration.
Biuret also known as biuret, allophanamide, carbamylurea, chemical formula NH2CONHCONH2, white crystalline powder, melt
190 DEG C of point, relative density 1.467, crystalline solid contains 4 crystallizations water, the dehydration at about 110 DEG C in water；It is dissolved in hot water, hot alcohol, it is micro-
It is dissolved in ether.Biuret will cause the damage of plant Determination of Chlorophyll after being absorbed by crops, directly affect the life of photosynthesis and plant
It is long, when especially giving crop applying foliar fertilizer, crop leaf jaundice, withered or even burn seedlings, fertilizer damage can be made.
If biuret solder is more than 1% in complex fertilizer, seed manure and foliar fertilizer cannot be done, otherwise can to crop seed and
Seedling generates murder by poisoning, and concentration is higher to generate salt damage, causes to burn root, rotten.
Therefore, it is necessary to be improved to solve the above technical problems to the prior art.
Summary of the invention
In view of this, effectively being controlled the purpose of the present invention is to provide Biuret Content control method in a kind of complex fertilizer
The content of biuret in complex fertilizer processed, improves the quality of complex fertilizer, prevent fertilizer damage even salt damage generation, reduce peasant because
Loss caused by improper fertilization；It is realized in particular by following technical scheme:
Biuret Content control method in complex fertilizer of the invention, comprising the following steps:
(1) auxiliary material and urea are passed through conveying equipment respectively to be delivered in fusion tank, shape at a temperature of 120~130 DEG C
At molten liquid, auxiliary material includes one or more of in chlorate class compound or ammonium salt compounds；
(2) molten liquid in fusion tank is stirred using agitating device, mixing time is 5~15min；
(3) molten liquid is discharged from the overflow port of fusion tank.
Further, the chlorination salt compounds are using one or more of potassium chloride, ammonium chloride and sodium chloride, ammonium salt
Class compound is using one or more of ammonium chloride, ammonium phosphate and ammonium nitrate.
Further, the auxiliary material uses ammonium chloride.
Further, the parts by weight of the ammonium chloride are 5.0~15.0%.
Further, the parts by weight of the ammonium chloride are 10.0%.
The invention also includes the agitating device of the Biuret Content control method suitable for above-mentioned complex fertilizer, the stirring
Device includes the screw rod being arranged in fusion tank, and screw rod is equipped with sliding block, and motor is fixedly connected on sliding block, and motor connection is useful
In the stirring rod of stirring molten liquid, stirring rod is equipped with stirring blade.
It is described the invention also includes the ammonia recycle device of the Biuret Content control method suitable for above-mentioned complex fertilizer
Ammonia recycle device is connect with the fusion tank, and ammonia recycle device is for collecting the ammonia in fusion tank and the ammonia by collection
It is delivered in fusion tank.
Further, the ammonia recycle device includes the ammonia storage bucket being connected to fusion tank and setting in ammonia storage bucket
Interior blower.
The invention also includes the biuret detection device of the Biuret Content control method suitable for above-mentioned complex fertilizer, contractings
The two urea detection devices connection conveying equipment for being used for transport urea, biuret detection device is for detecting biuret in urea
Content.
Further, the biuret detection device includes the sampling mechanism that urea is weighed from conveying equipment, for containing
The container of urea and vibrator for being vibrated to container.
Beneficial effects of the present invention: the present invention controls the temperature of urea melting at 120~130 DEG C, on the one hand can both protect
Barrier urea can melt completely, on the other hand avoid urea melting liquid that condensation reaction occurs at relatively high temperatures, generate biuret,
Reduce the quality of complex fertilizer；When urea melting, i.e., auxiliary material, chlorination salt compound or ammonium salt class chemical combination are added in fusing urea
Object, can reduce the temperature of urea melting, reduce because temperature it is excessively high caused by biuret production rate；It is melted simultaneously in urea
When melting, using agitating device, effectively molten liquid can be stirred, when contact so as to shorten molten liquid with heating coil
Between, and then reduce the production rate of biuret；Other beneficial effects of the invention combine embodiment progress in detail below further
Explanation.
Detailed description of the invention
The invention will be further described with reference to the accompanying drawings and examples:
Fig. 1 is the relational graph of biuret production rate and temperature of the invention；
Fig. 2 is the relational graph of biuret production rate and ammonia partial pressure of the invention；
Fig. 3 is the relational graph of biuret production rate of the invention and the molten liquid residence time in fusion tank；
Fig. 4 is Biuret and consumption sulfuric acid volume relationship figure of the invention；
Fig. 5 is structural schematic diagram of the invention.
In figure: 1, fusion tank；2, urea delivery pipe；3, heating coil；4, screw rod；5, sliding block；6, motor；7, stirring rod；
8, stirring blade；9, discharge pipe；10, support plate；11, rotary shaft；12, turntable；13, large arm；14, shaft；15, forearm；16, electric
Dynamic telescopic rod；17, connecting rod；18, sampling peck；19, model machine support is given in vibration；20, spring；21, sample slot is given in vibration；22, vibration support
Disk；23, through-hole；24, vibrating motor；25, pedestal；26, balance；27, balance on goods and services；28, container；Bi%: the life of biuret
At rate
Specific embodiment
It is as shown in the figure: Biuret Content control method in the complex fertilizer in the present embodiment, comprising the following steps:
(1) auxiliary material and urea are passed through conveying equipment respectively to be delivered in fusion tank 1, urea uses the weight of biuret
Part is no more than 1.0% urea, heating device, such as heating coil, water heating pipe etc. is equipped in fusion tank 1, in the present embodiment
Auxiliary material and urea are heated using heating coil 3, for material in 120~130 DEG C of formation molten liquids, auxiliary material includes chlorate class
It is one or more of in compound or ammonium salt compounds；
(2) molten liquid in fusion tank 1 is stirred using agitating device, mixing time is 5~15min；
(3) molten liquid is discharged from the overflow port of fusion tank 1 by discharge pipe 9, the overflow port of fusion tank 1 can use low
Overflow port, facilitates the discharge of molten liquid, to reduce the time of contact of molten liquid Yu heating coil 3, reduces molten liquid molten
Melt the residence time in slot 1, reduces the production rate of biuret.
The fusing point of urea is 132.7 DEG C, and condensation reaction occurs at high temperature, discharges ammonia and generates biuret, can be converse
It should be as follows:
Influencing the principal element that biuret generates has urea melting temperature, the ammonia partial pressure in urea melting liquid and urea melting
Volume residence time of the liquid in fusion tank is related；
According to GB/T2441.2-2010 method, the standard curve of biuret is obtained, takes dry urea to measure and is urinated
The content of biuret in element takes the drying urea of same amount respectively under the conditions of 0 DEG C, 140 DEG C, 150 DEG C, 160 DEG C and 170 DEG C
Heating one hour, measures the content of biuret, so that the production rate of biuret is obtained, as shown in table 1:
1 heating temperature of table and biuret production rate relationship
| T/℃ | Bi/% |
| 0 | 0.0 |
| 140 | 0.3 |
| 150 | 1.0 |
| 160 | 3.0 |
| 170 | 7.0 |
The relationship between heating temperature and the production rate of biuret is drawn according to table 1, as shown in Figure 1；As shown in Figure 1, when
One timing of urea concentration, temperature is higher, and biuret production rate, therefore reduces the temperature in fusion tank, it is possible to reduce because
The generation of biuret caused by temperature is excessively high；
It is learnt from the generation of biuret reaction, increases the ammonia content in urea melting liquid, is i.e. increase ammonia partial pressure, it is possible to reduce
Be conducive to contracting two conversely, ammonia content is fewer in urea melting liquid and ammonia partial pressure gets over hour with the generation for inhibiting urea condensate
The generation of urea；According to GB/T2441.2-2010 method, the standard curve of biuret is obtained, dry urea is taken to measure to obtain
The content of biuret in urea, take the drying urea of same amount and respectively add ammonia content 0.50g, 0.75g, 1.00g,
1.50g and 1.75g is heated one hour under the conditions of 150 DEG C respectively, is measured the content of biuret, obtain the production rate of biuret,
It is as shown in table 2:
Ammonia content (i.e. ammonia partial pressure) and biuret production rate relationship in 2 urea melting liquid of table
| Ammonia content/g | Bi/% |
| 0.50 | 4.0 |
| 0.75 | 2.0 |
| 1.00 | 1.0 |
| 1.50 | 0.5 |
| 1.75 | 0.25 |
Ammonia content in urea melting liquid, i.e. relationship between ammonia partial pressure and the production rate of biuret are drawn according to table 2, is such as schemed
Shown in 2；As shown in Figure 2, ammonia partial pressure is lower in solution, and biuret production rate is higher；Ammonia partial pressure is higher, and biuret production rate is got over
It is low.
According to GB/T2441.2-2010 method, the standard curve of biuret is obtained, takes dry urea to measure and is urinated
The content of biuret in element takes the drying urea of same amount to distinguish under the conditions of 130 DEG C, 140 DEG C, 150 DEG C and 160 DEG C respectively
Heating, measures the content of biuret, so that the production rate of biuret is obtained, as shown in table 3:
3 urea melting liquid of table residence time and biuret production rate relationship in fusion tank
Relationship of the urea melting liquid between residence time in fusion tank and the production rate of biuret is drawn according to table 3, such as
Shown in Fig. 3；From the figure 3, it may be seen that urea melting liquid and heating coil time of contact are longer, cause the temperature of molten liquid higher, thus
Keep biuret production rate bigger.
When urea melting, i.e., auxiliary material, chlorination salt compound or ammonium salt compounds are added in fusing urea, can be reduced
The temperature of urea melting, reduce because temperature it is excessively high caused by biuret production rate；Simultaneously when urea is melted, using stirring
Device is mixed, effectively molten liquid can be stirred, so as to shorten the time of contact of molten liquid and heating coil, and then reduces contracting
The production rate of two ureas.
In the present embodiment, the chlorination salt compounds use one or more of potassium chloride, ammonium chloride and sodium chloride,
Ammonium salt compounds are using one or more of ammonium chloride, ammonium phosphate and ammonium nitrate；When urea is melted, auxiliary material is added
The temperature of molten liquid can be reduced, and then reduces the production rate of biuret.
In the present embodiment, the auxiliary material uses ammonium chloride, learns from reaction equation, increases the ammonia content in urea liquid,
That is ammonia partial pressure increases, it is possible to reduce and inhibit the generation of urea condensate, conversely, having when ammonia partial pressure is reduced in urea melt
Conducive to the generation of biuret；Therefore, in urea melting, auxiliary material ammonium chloride is added, temperature when melting on the one hand can be reduced,
On the other hand it can increase ammonia partial pressure, so that the production rate of biuret when urea melting be effectively reduced.
In the present embodiment, the parts by weight of the ammonium chloride are 5.0~15.0%, and parts by weight refer to ammonium chloride quality and ammonium chloride
With the percentage of urea gross mass.
In the present embodiment, the parts by weight of the ammonium chloride are 10.0%, and parts by weight refer to ammonium chloride quality and ammonium chloride and urine
The percentage of plain gross mass.
It takes weight ammonium chloride part to be added for 10.0% in urea melting, on the one hand can reduce melting temperature, drop
The production rate of low biuret, temperature of the another aspect urea in melting are unlikely to too low, urea are caused to be unable to fully be melted
Melt, and then influences the preparation of complex fertilizer.
In the present embodiment, the agitating device includes the screw rod 4 being arranged in fusion tank 1, and screw rod 4 is arranged in fusion tank 1
Top, screw rod 4 is connected with the lead screw motor for driving screw rod 4 to move, and screw rod 4 is equipped with sliding block 5, fixed on sliding block 5 to connect
Be connected to motor 6, motor 6 is connected with the stirring rod 7 for stirring molten liquid, and stirring rod 7 is equipped with stirring blade 8, stirring rod 7 with
Movement of the sliding block 5 on screw rod 4, the entire molten liquid in fusion tank 1 is stirred, improve mixing effect, reduce molten
Melt the time of contact of liquid Yu heating coil 3, to reduce the production rate of biuret.
In the present embodiment, the fusion tank 1 is connected with for collecting the ammonia in fusion tank and conveying the ammonia of collection
Ammonia recycle device into fusion tank 1, when condensation reaction occurs in fusion tank 1 for urea, the ammonia that is overflowed from molten liquid
It is again introduced into molten liquid by ammonia recycle device, the ammonia partial pressure in molten liquid on the one hand can be effectively increased, to reduce contracting
On the other hand the generation of two ureas avoids ammonia from getting into the air, causes air pollution, influence the health of staff.
In the present embodiment, the ammonia recycle device includes the ammonia storage bucket being connected to fusion tank 1 and is arranged in ammonia
The blower in bucket is stored, is respectively equipped with ammonia outlet and ammonia imports on fusion tank 1, ammonia outlet and ammonia imports pass through respectively
Ammonia pipeline is connected to ammonia storage bucket, and the blower being arranged in ammonia storage bucket sucks the ammonia overflowed from molten liquid simultaneously
It is compressed, so that high pressure ammonia is passed through in molten liquid by ammonia imports, is divided to increase ammonia in molten liquid, reduce contracting
The production rate of two ureas.
In the present embodiment, the urea delivery pipe 2 of the conveying equipment for transport urea is also connected with for detecting urine
The biuret detection device of Biuret Content in element, biuret detection device can effectively detect containing for the biuret in urea
Amount ensures that the parts by weight of the biuret in urea are no more than 1.0%, to avoid the content of the biuret in the molten liquid of urea
It is excessively high, cause the Biuret Content in complex fertilizer excessively high, causes the damage of plant Determination of Chlorophyll；It can be effectively reduced simultaneously multiple
Complex fertilizer material because the excessively high generation of Biuret Content disqualification rate, to reduce the production cost of enterprise.
In the present embodiment, the biuret detection device includes weighing urea from the urea delivery pipe 2 of conveying equipment
Sampling mechanism, the container 28 for containing urea and the vibrator for being vibrated to container 28, sampling mechanism use
Quantitative sampling mechanism, quantitative sampling mechanism include sampling part and weighing piece；Sampling mechanism includes support plate 10 and passes through rotary shaft
11 turntables 12 connecting with support plate 10, rotary shaft 11 are connected with the shaft rotating motor for driving rotary shaft 11 to rotate, turntable
12 are connected with large arm 13 by shaft 14, and large arm 13 is connected with forearm 15 by shaft 14, and forearm 15 is hinged with by connecting rod 17
Sampling peck 18, forearm 15 are equipped with the electric telescopic rod 16 for driving sampling peck to move；Weighing piece uses balance 26, balance 26
It is placed on pedestal 25, balance on goods and services 27 is placed on balance 26, sample and be equipped with vibration between part and weighing piece to model machine, vibration
It include vibrating to sample slot 21, vibration is set to the vibrating motor 24 on sample slot 21 and connecting with vibrating to 21 bottom end of sample slot to model machine
It is connected to the vibratory tray 22 for conveying sample into balance on goods and services 27, vibratory tray 22 is equipped with through-hole 23, vibrates to model machine
Vibratory tray 22 vibration is connected with to model machine support 19 by spring 20, container 28 is equipped with spring 20, on container 28
The vibrator of setting uses vibrating motor 24；Electric telescopic rod 16 drives sampling peck 18 to be sampled, after sampling, by turning
Sampling peck 18 is placed in vibration and gives model machine top by the movement of disk 12, then passes through the movement of electric telescopic rod 16, is made in sampling peck 18
Sample fall on vibrating vibratory tray 22 to model machine, to the vibrating motor 24 on model machine, sample passes through vibration for starting vibration
Through-hole 23 on dynamic pallet 22 is fallen on balance on goods and services 27, after sample reaches requirement, closes vibration to the vibration on model machine
Sample on flat pallet 27, is manually placed in container 28 by dynamic motor, starts the vibrating motor 24 being arranged on container 28,
Dissolve sample.
The urea of 50.0g is weighed, is added in 100mL distilled water, oscillation makes it dissolve, and instills 3 drop mixed indicators, uses hydrogen
Ion concentration is that the sulfuric acid solution of 0.1mol/L is titrated to red just appearance, and 0.5min colour-fast is terminal, writes down the sulphur of consumption
The amount of acid, wherein mixed indicator uses 0.1% methyl red-methylene blue, and configuration method is as follows: weighing 0.12g methyl respectively
Red and 0.08g methylene blue, mixed dissolution is in 100mL dehydrated alcohol, in preservation and brown bottle；GB/ is pressed with same sample
T2441.2-2010 measures its biuret to make comparisons.Extracted immediately after 10 groups of data of number after measured Biuret Content 0.2~
0.5%, 0.5~0.75%, 0.75~1.0%, 1.0~1.5%, 1.5~2.0%, 2.0~more than 3.0% group data, such as table 4
It is shown:
Biuret Content relationship in 4 sulfuric acid consumption of table and urea
| Sulfuric acid/mL | Bi/% |
| 5.20 | 0.33 |
| 7.40 | 0.70 |
| 8.50 | 0.90 |
| 10.50 | 1.20 |
| 12.30 | 1.25 |
| 16.00 | 1.55 |
| 17.80 | 2.05 |
The relationship in sulfuric acid consumption and urea between Biuret Content is drawn according to table 4, as shown in Figure 4；Sampling peck from
Urea to be melted is taken out in the conveyance conduit of transport urea, the vibratory tray by vibration to model machine is fallen into the pallet of balance
Urea is fallen, the weight for weighing urea is 50.0g, is placed in container, and 100mL distilled water is added into container, opens simultaneously
Vibrator dissolves urea, instills 3 drop mixed indicators, and sulfuric acid is added dropwise into urea liquid and has just occurred to urea liquid is red,
And it is terminal that 0.5min is colour-fast, writes down the sulfuric acid amount of its consumption, and according to the sulfuric acid amount of consumption, corresponding contracting is read from Fig. 1
The content of two ureas ensures the quality of urea, and then ensure complex fertilizer to judge the content of institute's biuret-containing in urea
Quality avoids the Biuret Content in complex fertilizer excessively high, damages the chlorophyll of plant, to damage the photosynthesis of plant.
It is following that the present invention is further explained and is illustrated in conjunction with the embodiments:
Embodiment one
Biuret Content control method in complex fertilizer, comprising the following steps:
(1) random inspection is carried out to urea, determines the parts by weight 0.7% of biuret in urea, urea is set by conveying
It is standby to be delivered in fusion tank, meanwhile, the auxiliary material ammonium chloride that parts by weight are 5% is added into fusion tank, is carried out under the conditions of 130 DEG C
Melting forms molten liquid；
(2) molten liquid in fusion tank is stirred using stirring rod, mixing time 15min；
(3) molten liquid is discharged from the overflow port of fusion tank.
Molten liquid is taken, the quality 5.0g of molten liquid is weighed, according to GB/T2441.2-2010 method, obtains containing for biuret
0.11g is measured, the parts by weight in biuret in molten liquid remove the parts by weight of biuret in urea, the life of available biuret
At rate 1.5%.
Embodiment two
Biuret Content control method in complex fertilizer, comprising the following steps:
(1) random inspection is carried out to urea, determines the parts by weight 0.7% of biuret in urea, urea is set by conveying
It is standby to be delivered in fusion tank, meanwhile, the auxiliary material ammonium chloride that parts by weight are 5% is added into fusion tank, is carried out under the conditions of 125 DEG C
Melting forms molten liquid；
(2) molten liquid in fusion tank is stirred using stirring rod, mixing time 10min；
(3) molten liquid is discharged from the overflow port of fusion tank.
Molten liquid is taken, the quality 5.0g of molten liquid is weighed, according to GB/T2441.2-2010 method, obtains containing for biuret
0.1g is measured, the parts by weight in biuret in molten liquid remove the parts by weight of biuret in urea, the life of available biuret
At rate 1.3%.
Embodiment three
Biuret Content control method in complex fertilizer, comprising the following steps:
(1) random inspection is carried out to urea, determines the parts by weight 0.7% of biuret in urea, urea is set by conveying
It is standby to be delivered in fusion tank, meanwhile, the auxiliary material ammonium chloride that parts by weight are 5% is added into fusion tank, is carried out under the conditions of 120 DEG C
Melting forms molten liquid；
(2) molten liquid in fusion tank is stirred using stirring rod, mixing time 5min；
(3) molten liquid is discharged from the overflow port of fusion tank.
Molten liquid is taken, the quality 50.0g of molten liquid is weighed, according to GB/T2441.2-2010 method, obtains containing for biuret
0.08g is measured, the parts by weight in biuret in molten liquid remove the parts by weight of biuret in urea, the life of available biuret
At rate 0.9%.
Example IV
Biuret Content control method in complex fertilizer, comprising the following steps:
(1) random inspection is carried out to urea, determines the parts by weight 0.7% of biuret in urea, urea is set by conveying
It is standby to be delivered in fusion tank, meanwhile, the auxiliary material ammonium chloride that parts by weight are 10% is added into fusion tank, under the conditions of 130 DEG C into
Row melting, forms molten liquid；
(2) molten liquid in fusion tank is stirred using stirring rod, mixing time 15min；
(3) molten liquid is discharged from the overflow port of fusion tank.
Molten liquid is taken, the quality 5.0g of molten liquid is weighed, according to GB/T2441.2-2010 method, obtains containing for biuret
0.09g is measured, the parts by weight in biuret in molten liquid remove the parts by weight of biuret in urea, the life of available biuret
At rate 1.1%.
Embodiment five
Biuret Content control method in complex fertilizer, comprising the following steps:
(1) random inspection is carried out to urea, determines the parts by weight 0.7% of biuret in urea, urea is set by conveying
It is standby to be delivered in fusion tank, meanwhile, the auxiliary material ammonium chloride that parts by weight are 10% is added into fusion tank, under the conditions of 125 DEG C into
Row melting, forms molten liquid；
(2) molten liquid in fusion tank is stirred using stirring rod, mixing time 10min；
(3) molten liquid is discharged from the overflow port of fusion tank.
Molten liquid is taken, the quality 5.0g of molten liquid is weighed, according to GB/T2441.2-2010 method, obtains containing for biuret
0.07g is measured, the parts by weight in biuret in molten liquid remove the parts by weight of biuret in urea, the life of available biuret
At rate 0.7%.
Embodiment six
Biuret Content control method in complex fertilizer, comprising the following steps:
(1) random inspection is carried out to urea, determines the parts by weight 0.7% of biuret in urea, urea is set by conveying
It is standby to be delivered in fusion tank, meanwhile, the auxiliary material ammonium chloride that parts by weight are 10% is added into fusion tank, under the conditions of 120 DEG C into
Row melting, forms molten liquid；
(2) molten liquid in fusion tank is stirred using stirring rod, mixing time 5min；
(3) molten liquid is discharged from the overflow port of fusion tank.
Molten liquid is taken, the quality 5.0g of molten liquid is weighed, according to GB/T2441.2-2010 method, obtains containing for biuret
0.05g is measured, the parts by weight in biuret in molten liquid remove the parts by weight of biuret in urea, the life of available biuret
At rate 0.3%.
Embodiment seven
Biuret Content control method in complex fertilizer, comprising the following steps:
(1) random inspection is carried out to urea, determines the parts by weight 0.7% of biuret in urea, urea is set by conveying
It is standby to be delivered in fusion tank, meanwhile, the auxiliary material ammonium chloride that parts by weight are 15% is added into fusion tank, under the conditions of 130 DEG C into
Row melting, forms molten liquid；
(2) molten liquid in fusion tank is stirred using stirring rod, mixing time 15min；
(3) molten liquid is discharged from the overflow port of fusion tank.
Molten liquid is taken, the quality 5.0g of molten liquid is weighed, according to GB/T2441.2-2010 method, obtains containing for biuret
0.08g is measured, the parts by weight in biuret in molten liquid remove the parts by weight of biuret in urea, the life of available biuret
At rate 0.9%.
Embodiment eight
Biuret Content control method in complex fertilizer, comprising the following steps:
(1) random inspection is carried out to urea, determines the parts by weight 0.7% of biuret in urea, urea is set by conveying
It is standby to be delivered in fusion tank, meanwhile, the auxiliary material ammonium chloride that parts by weight are 15% is added into fusion tank, under the conditions of 125 DEG C into
Row melting, forms molten liquid；
(2) molten liquid in fusion tank is stirred using stirring rod, mixing time 10min；
(3) molten liquid is discharged from the overflow port of fusion tank.
Molten liquid is taken, the quality 5.0g of molten liquid is weighed, according to GB/T2441.2-2010 method, obtains containing for biuret
0.06g is measured, the parts by weight in biuret in molten liquid remove the parts by weight of biuret in urea, the life of available biuret
At rate 0.5%.
Embodiment nine
Biuret Content control method in complex fertilizer, comprising the following steps:
(1) random inspection is carried out to urea, determines the parts by weight 0.7% of biuret in urea, urea is set by conveying
It is standby to be delivered in fusion tank, meanwhile, the auxiliary material ammonium chloride that parts by weight are 15% is added into fusion tank, under the conditions of 120 DEG C into
Row melting, forms molten liquid；
(2) molten liquid in fusion tank is stirred using stirring rod, mixing time 5min；
(3) molten liquid is discharged from the overflow port of fusion tank.
Molten liquid is taken, the quality 5.0g of molten liquid is weighed, according to GB/T2441.2-2010 method, obtains containing for biuret
0.05g is measured, the parts by weight in biuret in molten liquid remove the parts by weight of biuret in urea, the life of available biuret
At rate 0.3%.
Embodiment one is to embodiment nine, urea condensation, shown in the production rate table 5 of biuret:
The reaction of 5 urea condensation of table, the production rate of biuret
| Bi/% | |
| Embodiment one | 1.5 |
| Embodiment two | 1.3 |
| Embodiment three | 0.9 |
| Example IV | 1.1 |
| Embodiment five | 0.7 |
| Embodiment six | 0.3 |
| Embodiment seven | 0.9 |
| Embodiment eight | 0.5 |
| Embodiment nine | 0.3 |
Finally, it is stated that the above examples are only used to illustrate the technical scheme of the present invention and are not limiting, although referring to compared with
Good embodiment describes the invention in detail, those skilled in the art should understand that, it can be to skill of the invention
Art scheme is modified or replaced equivalently, and without departing from the objective and range of technical solution of the present invention, should all be covered at this
In the scope of the claims of invention.
Claims (10)
1. Biuret Content control method in a kind of complex fertilizer, it is characterised in that: the following steps are included:
(1) auxiliary material and urea are passed through conveying equipment to be delivered in fusion tank respectively, is formed at a temperature of 120~130 DEG C molten
Melt liquid, auxiliary material includes one or more of in chlorate class compound or ammonium salt compounds；
(2) molten liquid in fusion tank is stirred using agitating device, mixing time is 5~15min；
(3) molten liquid is discharged from the overflow port of fusion tank.
2. Biuret Content control method in complex fertilizer according to claim 1, it is characterised in that: the chlorination salt
Compound one or more of using potassium chloride, ammonium chloride and sodium chloride, ammonium salt compounds using ammonium chloride, ammonium phosphate and
One or more of ammonium nitrate.
3. Biuret Content control method in complex fertilizer according to claim 2, it is characterised in that: the auxiliary material uses
Ammonium chloride.
4. Biuret Content control method in complex fertilizer according to claim 3, it is characterised in that: the ammonium chloride
Parts by weight are 5.0~15.0%.
5. Biuret Content control method in complex fertilizer according to claim 4, it is characterised in that: the ammonium chloride
Parts by weight are 10.0%.
6. one kind is used for the described in any item agitating devices of claim 1-5, it is characterised in that: the agitating device includes setting
Screw rod in fusion tank, screw rod are equipped with sliding block, are fixedly connected with motor on sliding block, motor is connected with for stirring molten liquid
Stirring rod, stirring rod be equipped with stirring blade.
7. one kind is used for the described in any item ammonia recycle devices of claim 1-5, it is characterised in that: the ammonia recycle device
It is connect with the fusion tank, ammonia recycle device is for collecting the ammonia in fusion tank and the ammonia of collection being delivered to fusion tank
In.
8. ammonia recycle device according to claim 7, it is characterised in that: the ammonia recycle device includes and fusion tank
The ammonia storage bucket of connection and the blower being arranged in ammonia storage bucket.
9. one kind is used for the described in any item biuret detection devices of claim 1-5, it is characterised in that: biuret detection device
The connection conveying equipment for being used for transport urea, biuret detection device are used to detect the content of biuret in urea.
10. Biuret Content control method in complex fertilizer according to claim 9, it is characterised in that: the biuret
Detection device includes the sampling mechanism for weighing urea from conveying equipment, the container for containing urea and is used for container
The vibrator vibrated.
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| CN201811300724.2A CN109503215A (en) | 2018-11-02 | 2018-11-02 | Biuret Content control method and its use device in complex fertilizer |
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| CN201811300724.2A CN109503215A (en) | 2018-11-02 | 2018-11-02 | Biuret Content control method and its use device in complex fertilizer |
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Application publication date: 20190322 |