CN104496624B - A kind of method and device for producing high tower nitro-compound fertilizer - Google Patents
A kind of method and device for producing high tower nitro-compound fertilizer Download PDFInfo
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- CN104496624B CN104496624B CN201510015664.XA CN201510015664A CN104496624B CN 104496624 B CN104496624 B CN 104496624B CN 201510015664 A CN201510015664 A CN 201510015664A CN 104496624 B CN104496624 B CN 104496624B
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Abstract
The invention provides a kind of method and device for producing high tower nitro-compound fertilizer, its raw material components and its weight ratio are：30~90% ammonium nitrate, 10~50% MAP, 0%~55% potassium sulfate and/or potassium chloride.Method and step is：NP slurries are made in one-level mixing channel in ammonium nitrate and MAP, and NPK slurries are made in potassium sulfate and NP slurries in two grades of mixing channels；The gas ammonia that 0.2~0.4MPa is passed through in three-level mixing channel is heated 10~30 minutes with NPK slurries, at a temperature of 0.6~1.5MPa pressure and 140 ~ 170 DEG C, and the NPK slurries that pH value is 4.2~5.5 are made；0.2~0.4MPa gas ammonia is passed through on conveying NPK slurries to the pipeline of comminutor, the pH value of regulation NPK slurries is 4.5~6.0；Granular high tower nitro-compound fertilizer is made into comminutor in NPK slurries.Present invention reduction composite fertilizer causes the risk of soil acidification after applying, and eliminates the defect that crop root system is burnt；Large scale equipment need not be set up, simple transformation is carried out on existing equipment at once, energy-saving and emission-reduction, beneficial to large-scale use and popularization.
Description
Technical field
The present invention relates to the production technology of high tower nitro-compound fertilizer and device, specifically a kind of ammonium nitrate melting tower granulation PH
Value adjusting device.
Background technology
Raw material nitrogen source currently used for the high tower nitro-compound fertilizer of production high concentration is mainly ammonium nitrate, and phosphorus source is mainly phosphorus
A sour ammonium, potassium resource is mainly potassium sulfate, potassium chloride etc..And the universal relatively low only 3.0-5.0 of the pH value of these raw materials, some of which
The potassium product pH value of producer only has 2.5-3.0.Given birth to caused by several raw material pH values for producing high tower nitro-compound fertilizer are relatively low
The finished particle pH value of production is relatively low, finished particle pH value（10%, 25 DEG C）Typically in 3.5-4.5 or so.
Composite fertilizer's finished particle pH value is relatively low, may cause soil acidification after, the problems such as crop root system is burnt,
So as to cause certain economic loss to peasant.
The content of the invention
It is an object of the invention to：For above-mentioned technical deficiency melting ammonium nitrate tower granulation composite fertilizer is improved there is provided one kind
The method and apparatus of pH value, so as to reduce the wind for causing soil acidification and elimination crop root system to be burnt after composite fertilizer applies
Danger.
The technical solution adopted in the present invention is：
A kind of method for producing high tower nitro-compound fertilizer, the raw material components and its weight of the production high tower nitro-compound fertilizer
Than for：30~90% ammonium nitrate, 10~50% MAP, 0%~55% potassium sulfate and/or potassium chloride.
The raw material of the production high tower nitro-compound fertilizer is potassium sulfate and/or potassium chloride, ammonium nitrate and MAP, then produces
The method of the high tower nitro-compound fertilizer includes step in detail below：
（1）The MAP feeding one-level mixing channel that the melting ammonium nitrate for being 4.0~5.0 by pH value, pH value are 3.5~4.5,
Above-mentioned material is stirred in one-level mixing channel, at a temperature of 0.6~1.5MPa pressure and 140~170 DEG C heat 10~
After 30 minutes, well mixed slurry is delivered into two grades of mixing channels；
（2）Potassium sulfate and/or potassium chloride and step by pH value for 2.5~3.5（1）Obtained slurry is in two grades of mixing channels
Interior stirring, at a temperature of the 0.6~1.5MPa pressure and 140~170 DEG C after heating 10~30 minutes, by it is well mixed,
PH value delivers to three-level mixing channel for 3.5~4.0 slurry；
（3）0.2~0.4MPa gas ammonia and step are passed through in three-level mixing channel（2）Obtained slurry is mixed in three-level
Stir in groove, at a temperature of the 0.6~1.5MPa pressure and 140 ~ 170 DEG C after heating 10~30 minutes, adjust above-mentioned slurry
PH value 4.2~5.5 and it to be delivered into comminutor by pipeline；
（4）A gas ammonia is set to send into mouth, be passed through 0.2 on slurry pipeline transport pipeline between three-level mixing channel and comminutor
~0.4MPa gas ammonia, further regulating step（3）The pH value of obtained slurry is 4.5~6.0, and material is sprayed by comminutor
In granulation tower, in above-mentioned slurry drop dropping process with condense, be cooled into after the cold air heat exchange of rising it is granular
High tower nitro-compound fertilizer.
The raw material of the production high tower nitro-compound fertilizer is ammonium nitrate and MAP, then produces the high tower nitro-compound fertilizer
Method includes step in detail below：
（1）The MAP feeding one-level mixing channel that the melting ammonium nitrate for being 4.0~5.0 by pH value, pH value are 3.5~4.5,
Above-mentioned material is stirred in one-level mixing channel, at a temperature of 0.6~1.5MPa pressure and 140~170 DEG C heat 10~
After 30 minutes, well mixed slurry is delivered into two grades of mixing channels；
（2）By step（1）Obtained slurry continues stirring in two grades of mixing channels, in 0.6~1.5MPa pressure and 140
After being heated 10~30 minutes at a temperature of~170 DEG C, the slurry well mixed, pH value is 3.8~4.8 is delivered into three-level and mixed
Close groove；
（3）0.2~0.4MPa gas ammonia and step are passed through in three-level mixing channel（2）Obtained slurry is mixed in three-level
Stir, heated 10~30 minutes at a temperature of 0.6~1.5MPa pressure and 140 ~ 170 DEG C in groove, adjust above-mentioned slurry
PH value is 4.2~5.5 and it is delivered into comminutor by pipeline；
（4）A gas ammonia is set to send into mouth, be passed through 0.2 on slurry pipeline transport pipeline between three-level mixing channel and comminutor
~0.4MPa gas ammonia, further regulating step（3）The pH value of obtained slurry is 4.5~6.0, and material is sprayed by comminutor
In granulation tower, in above-mentioned slurry drop dropping process with condense, be cooled into after the cold air heat exchange of rising it is granular
High tower nitro-compound fertilizer.
It is described production high tower nitro-compound fertilizer device, including be sequentially connected by pipeline one-level mixing channel, two grades mixing
Groove, three-level mixing channel and comminutor, raw material mixed in one-level mixing channel and two grades of mixing channels after, high tower nitro be made answer
Hefei slurry, comminutor, which is arranged in granulation tower described in middle and upper part, to be provided with gas ammonia feeding mouth, is passed through gas ammonia on three-level mixing channel,
Gas ammonia carries out neutralization reaction with the acid remained in the high tower nitro-compound fertilizer slurry in three-level mixing channel, adjusts its pH value.
Gas ammonia is set to send into mouth, be passed through gas ammonia, high tower nitro on pipeline between the three-level mixing channel and comminutor
Composite fertilizer's slurry during transport, wherein remain acid further with gas ammonia neutralization reaction, further adjust its pH value.
The gas ammonia set on pipeline between the three-level mixing channel and three-level mixing channel and comminutor sends into mouth, by gas
Ammonia feed-line connects battery limit (BL) ammonia source；The gas ammonia feed-line includes the 1 tunnel main pipe connected as one by threeway and 2 tunnels are parallel
Branch pipe is constituted, and 2 road branch pipes connect the gas ammonia feeding on the pipeline between three-level mixing channel and three-level mixing channel and comminutor respectively
Mouthful, it is respectively arranged with regulating valve on main pipe and 2 road branch pipes.
On the branch pipe of gas ammonia feeding mouth in the main pipe and connection three-level mixing channel, an active redundancy pipeline is also parallel with,
Regulating valve is provided with the active redundancy pipeline.
Flowmeter is provided with the main pipe.
The invention has the advantages that：
After using the pH value of high tower nitro-compound fertilizer produced by the invention adjusted, for 4.5~6.0, reduction composite fertilizer applies
Cause the risk of soil acidification after, eliminate the defect that crop root system is burnt.The device of the present invention need not set up large-scale
Equipment, carries out simple transformation at once, energy-saving and emission-reduction, beneficial to large-scale use and popularization on existing equipment.
Brief description of the drawings
Fig. 1 produces the flow chart of high tower nitro-compound fertilizer for the present invention.
In figure shown in label：1- one-levels mixing channel, bis- grades of mixing channels of 2-, 3- three-levels mixing channel, 4- comminutors, 5- one-levels are mixed
Close groove motor, bis- grades of mixing channel motors of 6-, 7- three-level mixing channels motor, 8- comminutors motor, 9- one-level mixing channels discharge valve,
Bis- grades of mixing channel discharge valves of 10-, 11- three-level mixing channels discharge valve, 12- three-level mixing channels be exported to comminutor slurry stop valve,
13- gas ammonias flowmeter, 1-1- ammonium nitrates enter one-level mixing channel pipeline, 1-2- MAP powders and enter one-level mixing channel pipeline, 1-3-
One-level mixing channel water charge line, 1-4- one-level mixing channel dedustings pipeline, 1-5- one-level mixing channel insulation jackets steam pipe line, 1-6-
One-level mixing channel heating steam pipe line, 1-7- one-level mixing channel slurries to two grades of mixing channel pipelines, 1-8- one-levels mix trench bottoms
Discharging pipeline, 1-9- one-level mixing channel jacket heat-preservation steam condensates pipeline, 1-10- one-levels mixing channel heating steam condensate pipe
Line, 2-1- potassium sulfate powders enter two grades of mixing channel pipelines, bis- grades of mixing channel water charge lines of 2-2-, bis- grades of mixing channel dust removing tubes of 2-3-
Line, bis- grades of mixing channel insulation jacket steam pipe lines of 2-4-, 2-5- bis- grades of mixing channel heating steam pipe lines, bis- grades of mixing channel material of 2-6-
Slurry to three-level mixing channel pipeline, bis- grades of mixing channel bottom discharge pipelines of 2-7-, bis- grades of mixing channel jacket heat-preservation steam of 2-8- are condensed
Liquid pipe line, 2-9- bis- grades of mixing channel heating steam condensate pipelines, 3-1- three-level mixing channels water charge line, 3-2- three-level mixing channels
Dedusting pipeline, 3-3- three-level mixing channel insulation jackets steam pipe line, 3-4- three-level mixing channel slurries to comminutor pipeline, 3-5- tri-
Level mixing channel bottom discharge pipeline, 3-6- three-level mixing channel jacket heat-preservation steam condensates pipeline, the heating of 3-7- three-levels mixing channel
Steam condensate pipeline, 3-8- three-levels mixing channel heating steam pipe line, 14-1- gas ammonias conveying main pipe, 14-2- three-level mixing channel material
Starch slurry aerating ammonia branch pipe, 14-4- three-level mixing channel slurry aerating ammonia active redundancy pipelines before aerating ammonia branch pipe, 14-3- comminutors.
Embodiment
As shown in figure 1, the present invention is a kind of method for producing high tower nitro-compound fertilizer, the production high tower nitro-compound fertilizer
Raw material components and its weight ratio be：30~90% ammonium nitrate, 10~50% MAP, 0%~55% potassium sulfate and/or chlorine
Change potassium.
If the raw material for producing high tower nitro-compound fertilizer is potassium sulfate and/or potassium chloride, ammonium nitrate and MAP, produce
The method of the high tower nitro-compound fertilizer includes step in detail below：
（1）The MAP feeding one-level mixing channel that the melting ammonium nitrate for being 4.0~5.0 by pH value, pH value are 3.5~4.5
1, above-mentioned material is stirred in one-level mixing channel 1, heated at a temperature of 0.6~1.5MPa pressure and 140~170 DEG C
10~30 minutes, the nitrogen being well mixed, phosphorus slurry is made（NP slurries）And it is passed to two grades of mixing channels 2；
In present embodiment, one-level mixing channel 1 is also added with returning charge.Returning charge is in step（4）Obtained finished product high tower nitre
In base composite fertilizer particle, the underproof big particle and small particles, i.e. size of screening process are more than standard value or less than standard value
High tower nitro-compound fertilizer particle.These underproof big particles and small particles are returned again into one-level mixing channel 1 and re-start system
Starch operation.
（2）Potassium sulfate and/or potassium chloride and step by pH value for 2.5~3.5（1）Obtained nitrogen, phosphorus slurry（NP expects
Slurry）Stirred in two grades of mixing channels 2,10~30 points are heated at a temperature of 0.6~1.5MPa pressure and 140~170 DEG C
Clock, it is 3.5~4.0 nitrogen, phosphorus, potassium slurry that be well mixed, pH value, which is made,（NPK slurries）And it is passed to three-level mixing channel
3；
In this step, in two grades of mixing channels 2：A kind of raw material of potassium sulfate can only be sent into, potassium chloride one can be only sent into
Raw material is planted, two kinds of raw materials of potassium sulfate and potassium chloride can also be sent into simultaneously；But it is to ensure that the potassium sulfate and/or potassium chloride of addition
Meet said components proportioning.
（3）0.2~0.4MPa gas ammonia and step are passed through in three-level mixing channel 3（2）Obtained nitrogen, phosphorus, potassium slurry
（NPK slurries）Stirred in three-level mixing channel 3,10~30 are heated at a temperature of 0.6~1.5MPa pressure and 140 ~ 170 DEG C
Minute, adjust above-mentioned nitrogen, phosphorus, potassium slurry（NPK slurries）PH value for 4.2~5.5 and by its by three-level mixing channel slurry extremely
Comminutor pipeline 3-4 delivers to granulation tower；
（4）In three-level mixing channel slurry to comminutor pipeline 3-4（That is delivery of nitrogen, phosphorus, potassium slurry（NPK slurries）To granulation
The pipeline of machine 4）It is upper to set a gas ammonia to send into mouth, be passed through 0.2~0.4MPa gas ammonia, further adjust nitrogen, phosphorus, potassium slurry
（NPK slurries）PH value be 4.5~6.0；Material is sprayed in granulation tower by comminutor 4, above-mentioned nitrogen, phosphorus, potassium slurry
（NPK slurries）Answered in drop dropping process with granular high tower nitro is condensed, be cooled into after the cold air heat exchange of rising
Hefei.
If the raw material for producing high tower nitro-compound fertilizer is ammonium nitrate and MAP, the high tower nitro-compound fertilizer is produced
Method includes step in detail below：
（1）The MAP feeding one-level mixing channel that the melting ammonium nitrate for being 4.0~5.0 by pH value, pH value are 3.5~4.5
1, above-mentioned material is stirred in one-level mixing channel 1, heated at a temperature of 0.6~1.5MPa pressure and 140~170 DEG C
10~30 minutes, the nitrogen being well mixed, phosphorus slurry is made（NP slurries）And it is passed to two grades of mixing channels 2；
（2）By step（1）Obtained nitrogen, phosphorus slurry（NP slurries）Continue in two grades of mixing channels 2 to stir, 0.6~
Heated 10~30 minutes at a temperature of 1.5MPa pressure and 140~170 DEG C, be made well mixed, pH value is 3.8~4.8
Nitrogen, phosphorus slurry（NP slurries）And it is passed to three-level mixing channel 3；
（3）0.2~0.4MPa gas ammonia and step are passed through in three-level mixing channel 3（2）Obtained nitrogen, phosphorus slurry（NP expects
Slurry）Stir, heated 10~30 minutes at a temperature of 0.6~1.5MPa pressure and 140 ~ 170 DEG C in three-level mixing channel 3,
Adjust above-mentioned nitrogen, phosphorus slurry（NP slurries）PH value 4.2~5.5 and it to be passed through into three-level mixing channel slurry to comminutor pipe
Line 3-4 delivers to comminutor 4；
（4）In three-level mixing channel slurry to comminutor pipeline 3-4（That is delivery of nitrogen, phosphorus slurry（NP slurries）To comminutor 4
Pipeline）It is upper to set a gas ammonia to send into mouth, be passed through 0.2~0.4MPa gas ammonia, further adjust nitrogen, phosphorus slurry（NP slurries）'s
PH value is 4.5~6.0；Material is sprayed in granulation tower by comminutor 4, above-mentioned nitrogen, phosphorus slurry（NP slurries）Under drop
With being condensed after the cold air heat exchange of rising, being cooled into granular high tower nitro-compound fertilizer during falling.
The present invention production high tower nitro-compound fertilizer device, including be sequentially connected by pipeline one-level mixing channel 1, two grades mix
Close groove 2, three-level mixing channel 3 and comminutor 4.Raw material mixed in one-level mixing channel 1 and two grades of mixing channels 2 after, be made height
Tower nitro-compound fertilizer slurry, comminutor 4 is arranged on middle and upper part in granulation tower.The present invention innovation be：In three-level mixing
Gas ammonia feeding mouth is provided with groove 3, is passed through what is remained in gas ammonia, gas ammonia and three-level mixing channel 3 in high tower nitro-compound fertilizer slurry
Sour neutralization reaction, adjusts its pH value.Gas ammonia is set to send into mouth, be passed through gas on pipeline between three-level mixing channel 3 and comminutor 4
Remained in ammonia, high tower nitro-compound fertilizer slurry acid during transport, further with gas ammonia neutralization reaction, further adjust it
PH value.
The gas ammonia feeding mouth set on pipeline between above-mentioned three-level mixing channel 3 and three-level mixing channel 3 and comminutor 4, leads to
Cross gas ammonia feed-line connection battery limit (BL) ammonia source.The gas ammonia feed-line includes 1 tunnel main pipe and 2 tunnels connected as one by threeway
Parallel branch pipe composition, is respectively designated as：Gas ammonia conveying main pipe 14-1, three-level mixing channel slurry aerating ammonia branch pipe 14-2 and comminutor
Preceding slurry aerating ammonia branch pipe 14-3, gas ammonia conveying main pipe 14-1 connections battery limit (BL) ammonia source, 2 road branch pipe 14-2 and 14-3 are connected respectively
Three-level mixing channel 3 and three-level mixing channel slurry are to comminutor pipeline 3-4（Pipeline between three-level mixing channel 3 and comminutor 4）On
Gas ammonia feeding mouth.Slurry aerating before gas ammonia conveying main pipe 14-1, three-level mixing channel slurry aerating ammonia branch pipe 14-2 and comminutor
Regulating valve is respectively arranged with ammonia branch pipe 14-3, so as to separately adjustable flow therein.Set on gas ammonia conveying main pipe 14-1
Gas ammonia flowmeter 13 is equipped with, the gas ammonia data on flows being passed through control unit can be read or delivered to.
On gas ammonia conveying main pipe 14-1 and three-level mixing channel slurry aerating ammonia branch pipe 14-2, a three-level mixing is also parallel with
Regulating valve is provided with groove slurry aerating ammonia active redundancy pipeline 14-4, three-level mixing channel slurry aerating ammonia active redundancy pipeline 14-4.
In embodiment as shown in Figure 1, in one-level mixing channel 1：One-level mixing channel pipeline 1-1 feedings are entered by ammonium nitrate
The ammonium nitrate of molten, enter by MAP powder one-level mixing channel pipeline 1-2 feeding MAP powders, pass through one-level mixing channel
Motor 5 drives mixer, one-level mixing channel heating steam pipe line 1-6 to be passed through heating steam so that above-mentioned material 0.6~
Heated 10~30 minutes at a temperature of 1.5MPa pressure and 140~170 DEG C, nitrogen, phosphorus slurry is made（NP slurries）.
In two grades of mixing channels 2：NP slurries are sent into, by potassium sulfate by one-level mixing channel slurry to two grades of mixing channel pipeline 1-7
Powder enters two grades of mixing channel pipeline 2-1 feeding potassium sulfates, drives mixer, two grades of mixing channels to add by two grades of mixing channel motors 6
Vapours pipeline 2-5 is passed through heating steam so that above-mentioned material is in 0.6~1.5MPa pressure and 140~170 DEG C of temperature
Lower heating 10~30 minutes, it is 3.5~4.0 nitrogen, phosphorus, potassium slurry that pH value, which is made,（NPK slurries）.
In three-level mixing channel 3：Mixed by two grades of mixing channel slurries to three-level mixing channel pipeline 2-6 feeding NPK slurries, by three-level
Close groove slurry aerating ammonia branch pipe 14-2 and be passed through gas ammonia, drive mixer, the heating of three-level mixing channel to steam by three-level mixing channel motor 7
Steam pipe line 3-8 is passed through heating steam so that above-mentioned material adds at a temperature of 0.6~1.5MPa pressure and 140~170 DEG C
Heat 10~30 minutes, gas ammonia and material neutralization reaction, are made the NPK slurries that pH value is 4.2~5.5.
Three-level mixing channel slurry is on comminutor pipeline 3-4：Gas ammonia is passed through by slurry aerating ammonia branch pipe 14-3 before comminutor,
With the NPK slurry neutralization reactions of delivered inside, further the NPK slurries pH value of regulation feeding comminutor 4 is 4.5~6.0.
Done work by comminutor motor 8, comminutor 4 sprays NPK slurries in granulation tower in spurting, NPK slurry liquid
With being condensed after the cold air heat exchange of rising, being cooled into granular high tower nitro-compound fertilizer during dripping；The high tower
It is 4.5~6.0 that nitro-compound fertilizer finished particle measures the pH value drawn under conditions of 10% aqueous solution, 25 DEG C of temperature.
Embodiment one
In present embodiment, the raw material components and its weight ratio for producing high tower nitro-compound fertilizer are：Ammonium nitrate 35%, phosphorus
A sour ammonium 13%, potassium sulfate 52%.
Using the production method of the high tower nitro-compound fertilizer of above component, including step in detail below：
（1）Will melting ammonium nitrate, stir in MAP feeding one-level mixing channel 1, in 1.3MPa pressure and 165 DEG C
At a temperature of heat about 30 minutes, NP slurries are made；
（2）Potassium sulfate and above-mentioned NP slurries are stirred in two grades of mixing channels 2, in 1.3MPa pressure and 165 DEG C of temperature
The lower heating of degree about 20 minutes, is made NPK slurries；
（3）0.4MPa gas ammonia is passed through in three-level mixing channel 3, stirs above-mentioned NPK slurries in three-level mixing channel 3,
Heated at a temperature of about 1.3MPa pressure and 165 DEG C about 15 minutes, the pH value of regulation NPK slurries is 4.2~5.5；
（4）0.4MPa gas ammonia is passed through on three-level mixing channel slurry to comminutor pipeline 3-4, further regulation NPK material
The pH value of slurry is sprayed in granulation tower for 4.5~6.0, NPK slurries by comminutor 4, in NPK slurry drop dropping process with it is upper
Condensed after the cold air heat exchange risen, be cooled into granular high tower nitro-compound fertilizer.
Embodiment two
In present embodiment, the raw material components and its weight ratio for producing high tower nitro-compound fertilizer are：Ammonium nitrate 61.5%,
MAP 30.5%, potassium chloride 8%.
Using the production method of the high tower nitro-compound fertilizer of above component, including step in detail below：
（1）Will melting ammonium nitrate, stir in MAP feeding one-level mixing channel 1, in 1.2MPa pressure and 165 DEG C
At a temperature of heat about 30 minutes, NP slurries are made；
（2）Potassium chloride and above-mentioned NP slurries are stirred in two grades of mixing channels 2, in 1.2MPa pressure and 165 DEG C of temperature
The lower heating of degree about 20 minutes, is made NPK slurries；
（3）About 0.3MPa gas ammonia is passed through in three-level mixing channel 3, stirs above-mentioned NPK slurries in three-level mixing channel 3
Mix, heated at a temperature of 1.2MPa pressure and 165 DEG C about 15 minutes, the pH value of regulation NPK slurries is 4.2~5.5；
（4）0.3MPa gas ammonia is passed through on three-level mixing channel slurry to comminutor pipeline 3-4, further regulation NPK material
The pH value of slurry is sprayed in granulation tower for 4.5~6.0, NPK slurries by comminutor 4, in NPK slurry drop dropping process with it is upper
Condensed after the cold air heat exchange risen, be cooled into granular high tower nitro-compound fertilizer.
Embodiment three
In present embodiment, the raw material components and its weight ratio for producing high tower nitro-compound fertilizer are：Ammonium nitrate 61%, phosphorus
A sour ammonium 20.5%, potassium sulfate and potassium chloride 18.5%.
Using the production method of the high tower nitro-compound fertilizer of above component, including step in detail below：
（1）Will melting ammonium nitrate, stir in MAP feeding one-level mixing channel 1, in 1.2MPa pressure and 165 DEG C
At a temperature of heat about 30 minutes, NP slurries are made；
（2）Potassium sulfate and potassium chloride are stirred in two grades of mixing channels 2 with above-mentioned NP slurries, 1.2MPa pressure and
Heated at a temperature of 165 DEG C about 20 minutes, NPK slurries are made；
（3）0.3MPa gas ammonia is passed through in three-level mixing channel 3, stirs above-mentioned NPK slurries in three-level mixing channel 3,
Heated at a temperature of 1.2MPa pressure and 165 DEG C about 15 minutes, the pH value of regulation NPK slurries is 4.2~5.5；
（4）0.3MPa gas ammonia is passed through on three-level mixing channel slurry to comminutor pipeline 3-4, further regulation NPK material
The pH value of slurry is sprayed in granulation tower for 4.5~6.0, NPK slurries by comminutor 4, in NPK slurry drop dropping process with it is upper
Condensed after the cold air heat exchange risen, be cooled into granular high tower nitro-compound fertilizer.
Example IV
In present embodiment, the raw material components and its weight ratio for producing high tower nitro-compound fertilizer are：Ammonium nitrate 90%, phosphorus
A sour ammonium 10%.
Using the production method of the high tower nitro-compound fertilizer of above component, including step in detail below：
（1）Will melting ammonium nitrate, stir in MAP feeding one-level mixing channel 1, in 0.6MPa pressure and 155 DEG C
At a temperature of heat about 20 minutes, NP slurries are made；
（2）Above-mentioned NP slurries are stirred in two grades of mixing channels 2, are heated about at a temperature of 0.6MPa pressure and 155 DEG C
20 minutes, NP slurries are made；
（3）0.2MPa gas ammonia is passed through in three-level mixing channel 3, stirs above-mentioned NP slurries in three-level mixing channel 3,
Heated about 15 minutes at a temperature of 0.6MPa pressure and 155 DEG C, the pH value of regulation NP slurries is 4.2~5.5；
（4）0.2MPa gas ammonia is passed through on three-level mixing channel slurry to comminutor pipeline 3-4, further regulation NP slurries
PH value sprayed for 4.5~6.0, NP slurries by comminutor 4 in granulation tower, with rising in NP slurry drop dropping process
Condensed after cold air heat exchange, be cooled into granular high tower nitro-compound fertilizer.
Embodiment five
In present embodiment, the raw material components and its weight ratio for producing high tower nitro-compound fertilizer are：Ammonium nitrate 50%, phosphorus
A sour ammonium 50%, potassium sulfate 8%.
Using the production method of the high tower nitro-compound fertilizer of above component, including step in detail below：
（1）Will melting ammonium nitrate, stir in MAP feeding one-level mixing channel 1, in 1.2MPa pressure and 165 DEG C
At a temperature of heat about 20 minutes, NP slurries are made；
（2）Above-mentioned NP slurries are stirred in two grades of mixing channels 2, are heated about at a temperature of 1.2MPa pressure and 165 DEG C
20 minutes, NP slurries are made；
（3）0.3MPa gas ammonia is passed through in three-level mixing channel 3, stirs above-mentioned NPK slurries in three-level mixing channel 3,
Heated at a temperature of 1.2MPa pressure and 165 DEG C about 15 minutes, the pH value of regulation NPK slurries is 4.2~5.5；
（4）0.3MPa gas ammonia is passed through on three-level mixing channel slurry to comminutor pipeline 3-4, further regulation NPK material
The pH value of slurry is sprayed in granulation tower for 4.5~6.0, NPK slurries by comminutor 4, in NPK slurry drop dropping process with it is upper
Condensed after the cold air heat exchange risen, be cooled into granular high tower nitro-compound fertilizer.
Claims (7)
1. a kind of method for producing high tower nitro-compound fertilizer, it is characterised in that the raw material group of the production high tower nitro-compound fertilizer
Divide and its weight ratio is：30~90% ammonium nitrate, 10~50% MAP, 0%~55% potassium sulfate and/or potassium chloride, and
The content of potassium sulfate and/or potassium chloride is not 0；Producing the method for the high tower nitro-compound fertilizer includes step in detail below：
（1）The MAP feeding one-level mixing channel that the melting ammonium nitrate for being 4.0~5.0 by pH value, pH value are 3.5~4.5, will be upper
State material to stir in one-level mixing channel, 10~30 points are heated at a temperature of 0.6~1.5MPa pressure and 140~170 DEG C
Zhong Hou, two grades of mixing channels are delivered to by well mixed slurry；
（2）Potassium sulfate and/or potassium chloride and step by pH value for 2.5~3.5（1）Obtained slurry is stirred in two grades of mixing channels
Mix, at a temperature of the 0.6~1.5MPa pressure and 140~170 DEG C after heating 10~30 minutes, by well mixed, pH value
Three-level mixing channel is delivered to for 3.5~4.0 slurry；
（3）0.2~0.4MPa gas ammonia and step are passed through in three-level mixing channel（2）Obtained slurry is in three-level mixing channel
Stirring, at a temperature of the 0.6~1.5MPa pressure and 140 ~ 170 DEG C after heating 10~30 minutes, adjusts the pH of above-mentioned slurry
It is worth 4.2~5.5 and it to be delivered into comminutor by pipeline；
（4）Set on slurry pipeline transport pipeline between three-level mixing channel and comminutor gas ammonia send into mouth, be passed through 0.2~
0.4MPa gas ammonia, further regulating step（3）The pH value of obtained slurry is 4.5~6.0, and material is sprayed by comminutor
In granulation tower, with being condensed after the cold air heat exchange of rising, being cooled into granular height in above-mentioned slurry drop dropping process
Tower nitro-compound fertilizer.
2. a kind of method for producing high tower nitro-compound fertilizer, it is characterised in that the raw material group of the production high tower nitro-compound fertilizer
Divide and its weight ratio is：30~90% ammonium nitrate, 10~50% MAP；Producing the method for the high tower nitro-compound fertilizer includes
Step in detail below：
（1）The MAP feeding one-level mixing channel that the melting ammonium nitrate for being 4.0~5.0 by pH value, pH value are 3.5~4.5, will be upper
State material to stir in one-level mixing channel, 10~30 points are heated at a temperature of 0.6~1.5MPa pressure and 140~170 DEG C
Zhong Hou, two grades of mixing channels are delivered to by well mixed slurry；
（2）By step（1）Obtained slurry continues stirring in two grades of mixing channels, 0.6~1.5MPa pressure and 140~
After being heated 10~30 minutes at a temperature of 170 DEG C, the slurry well mixed, pH value is 3.8~4.8 is delivered into three-level and mixed
Groove；
（3）0.2~0.4MPa gas ammonia and step are passed through in three-level mixing channel（2）Obtained slurry is in three-level mixing channel
Stirring, is heated 10~30 minutes at a temperature of 0.6~1.5MPa pressure and 140 ~ 170 DEG C, adjusts the pH value of above-mentioned slurry
4.2~5.5 and it to be delivered into comminutor by pipeline；
（4）Set on slurry pipeline transport pipeline between three-level mixing channel and comminutor gas ammonia send into mouth, be passed through 0.2~
0.4MPa gas ammonia, further regulating step（3）The pH value of obtained slurry is 4.5~6.0, and material is sprayed by comminutor
In granulation tower, with being condensed after the cold air heat exchange of rising, being cooled into granular height in above-mentioned slurry drop dropping process
Tower nitro-compound fertilizer.
3. the method for production high tower nitro-compound fertilizer according to claim 1 or claim 2, including mixed by the one-level that pipeline is sequentially connected
Close groove, two grades of mixing channels, three-level mixing channel and comminutor, raw material mixed in one-level mixing channel and two grades of mixing channels after,
High tower nitro-compound fertilizer slurry is made, comminutor is arranged on middle and upper part in granulation tower；Characterized in that, on the three-level mixing channel
It is provided with gas ammonia feeding mouth, is passed through gas ammonia, gas ammonia enters with the acid remained in the high tower nitro-compound fertilizer slurry in three-level mixing channel
Row neutralization reaction, adjusts its pH value.
4. produce the method for high tower nitro-compound fertilizer according to claim 3, it is characterised in that in the three-level mixing channel and
On pipeline between comminutor set gas ammonia send into mouth, be passed through gas ammonia, high tower nitro-compound fertilizer slurry during transport, wherein
Residual acid further with gas ammonia neutralization reaction, further adjust its pH value.
5. the method for high tower nitro-compound fertilizer is produced according to claim 4, it is characterised in that the three-level mixing channel and three
The gas ammonia set on pipeline between level mixing channel and comminutor sends into mouth, connects battery limit (BL) ammonia source by gas ammonia feed-line；
The parallel branch pipe of 1 tunnel main pipe and 2 tunnels that the gas ammonia feed-line includes being connected as one by threeway is constituted, and 2 road branch pipes are connected respectively
Set respectively on gas ammonia feeding mouth on pipeline between three-level mixing channel and three-level mixing channel and comminutor, main pipe and 2 road branch pipes
It is equipped with regulating valve.
6. the method for high tower nitro-compound fertilizer is produced according to claim 5, it is characterised in that the main pipe and connection three-level
On the branch pipe of gas ammonia feeding mouth on mixing channel, also it is parallel with an active redundancy pipeline, the active redundancy pipeline and is provided with regulating valve.
7. the method for high tower nitro-compound fertilizer is produced according to claim 5, it is characterised in that stream is provided with the main pipe
Gauge.
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| CN105198520B (en) * | 2015-08-14 | 2019-02-01 | 中国石油化工股份有限公司 | Prevent the method that ammonium nitrate fires in high-tower granulation production nitrate-based compound fertilizer technique |
| CN108083918A (en) * | 2017-12-28 | 2018-05-29 | 深圳市芭田生态工程股份有限公司 | High tower nitro-compound fertilizer and its method containing organic carbon |
| CN112409071A (en) * | 2020-11-24 | 2021-02-26 | 南宁九禾测土配肥有限责任公司 | Water-soluble high-tower nitro-sulfenyl compound fertilizer suitable for high-pressure sprinkling irrigation equipment and preparation method thereof |
| CN113860941A (en) * | 2021-11-11 | 2021-12-31 | 金杰理 | Low-cost high-quality nitro-sulfenyl ternary fertilizer and preparation method thereof |
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