CN104496624A - Method and device for producing high tower nitryl compound fertilizer - Google Patents
Method and device for producing high tower nitryl compound fertilizer Download PDFInfo
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- CN104496624A CN104496624A CN201510015664.XA CN201510015664A CN104496624A CN 104496624 A CN104496624 A CN 104496624A CN 201510015664 A CN201510015664 A CN 201510015664A CN 104496624 A CN104496624 A CN 104496624A
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- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05B—PHOSPHATIC FERTILISERS
- C05B7/00—Fertilisers based essentially on alkali or ammonium orthophosphates
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Abstract
The invention provides a method and device for producing high tower nitryl compound fertilizer. The raw material composition and weight ratio of the high tower nitryl compound fertilizer are 30-90% of nitramine, 10-50% of monoammonium phosphate, 0-55% of potassium sulphate and/or potassium chloride. The method comprises the following steps: mixing the nitramine and the monoammonium phosphate in a first mixing tank to prepare NP slurry, and mixing the potassium sulphate and NP slurry in a second mixing tank to prepare NPK slurry; injecting 0.2-0.4 MPa of ammonia gas and the NPK slurry into a third mixing tank, heating for 10-30 minutes under 0.6-1.5 MPa of pressure and 140-170 DEG C of temperature, and preparing the NPK slurry with 4.2-5.5 of PH value; conveying the NPK slurry to a pipeline of a pelletizer and injecting 0.2-0.4 MPa of ammonia gas, and adjusting the PH value of the NPK slurry to 4.5-6.0; and conveying the NPK slurry to the pelletizer to prepare the granular high tower nitryl compound fertilizer. The method and device are capable of reducing the risk of soil acidification caused by using compound fertilizer, eliminating the defect of the crop root burning without increasing the large equipment, performing the simple transformation based on the original equipment, saving the energy and reducing the emission, and are suitable for large-scale use and promotion.
Description
Technical field
The present invention relates to production technology and the device of high tower nitro-compound fertilizer, specifically a kind of ammonium nitrate melting tower granulation pH value setting device.
Background technology
Raw material nitrogenous source at present for the production of the high tower nitro-compound fertilizer of high density is mainly ammonium nitrate, and phosphorus source is mainly monoammonium phosphate, and potassium source is mainly potassium sulfate, Repone K etc.And the pH value of these raw materials is general lowlyer only has 3.0-5.0, wherein the potassium product pH value of some producer only has 2.5-3.0.Because the lower finished particle pH value of production that causes of several raw material pH values producing high tower nitro-compound fertilizer is also lower, finished particle pH value (10%, 25 DEG C) is general at about 3.5-4.5.
Composite fertilizer's finished particle pH value is lower, may cause soil acidification after using, and farm crop root system such as to be burnt at the problem, thus causes certain financial loss to peasant.
Summary of the invention
The object of the invention is to: for above-mentioned technical deficiency, a kind of method and apparatus improving melting ammonium nitrate tower granulation composite fertilizer pH value is provided, thus reduction composite fertilizer causes soil acidification and eliminates farm crop root system by the risk of burning after using.
The technical solution adopted in the present invention is:
Produce a method for high tower nitro-compound fertilizer, feed composition and the weight ratio thereof of described production high tower nitro-compound fertilizer are: the ammonium nitrate of 30 ~ 90%, the monoammonium phosphate of 10 ~ 50%, 0% ~ 55% potassium sulfate and/or Repone K.
The raw material of described production high tower nitro-compound fertilizer is potassium sulfate and/or Repone K, ammonium nitrate and monoammonium phosphate, then the method for producing this high tower nitro-compound fertilizer comprises following concrete steps:
(1) by pH value be 4.0 ~ 5.0 melting ammonium nitrate, pH value be 3.5 ~ 4.5 monoammonium phosphate send into one-level tempering tank, above-mentioned material is stirred in one-level tempering tank, at the temperature of the pressure of 0.6 ~ 1.5MPa and 140 ~ 170 DEG C, heating is after 10 ~ 30 minutes, and the slip mixed is delivered to secondary tempering tank;
(2) by pH value be 2.5 ~ 3.5 potassium sulfate and/or the obtained slip of Repone K and step (1) stir in secondary tempering tank, at the temperature of the pressure of 0.6 ~ 1.5MPa and 140 ~ 170 DEG C, heating is after 10 ~ 30 minutes, by mix, pH value be 3.5 ~ 4.0 slip deliver to three grades of tempering tanks;
(3) in three grades of tempering tanks, pass into the gas ammonia of 0.2 ~ 0.4MPa, the slip obtained with step (2) stirs in three grades of tempering tanks, at the temperature of the pressure of 0.6 ~ 1.5MPa and 140 ~ 170 DEG C, heating is after 10 ~ 30 minutes, regulates the pH value of above-mentioned slip be 4.2 ~ 5.5 and it is delivered to tablets press by pipeline;
(4) on three grades of slurry pipeline transport pipelines between tempering tank and tablets press, arrange a gas ammonia to send into mouth, pass into the gas ammonia of 0.2 ~ 0.4MPa; the pH value of the slip that further regulating step (3) is obtained is 4.5 ~ 6.0; material by tablets press spray, is condensed in above-mentioned slip droplets fall process with after the freezing air heat exchange of rising, cools and form granular high tower nitro-compound fertilizer in prilling tower.
The raw material of described production high tower nitro-compound fertilizer is ammonium nitrate and monoammonium phosphate, then the method for producing this high tower nitro-compound fertilizer comprises following concrete steps:
(1) by pH value be 4.0 ~ 5.0 melting ammonium nitrate, pH value be 3.5 ~ 4.5 monoammonium phosphate send into one-level tempering tank, above-mentioned material is stirred in one-level tempering tank, at the temperature of the pressure of 0.6 ~ 1.5MPa and 140 ~ 170 DEG C, heating is after 10 ~ 30 minutes, and the slip mixed is delivered to secondary tempering tank;
(2) slip obtained for step (1) is continued to stir in secondary tempering tank, heat 10 ~ 30 minutes at the temperature of the pressure of 0.6 ~ 1.5MPa and 140 ~ 170 DEG C after, by mix, pH value be 3.8 ~ 4.8 slip deliver to three grades of tempering tanks;
(3) in three grades of tempering tanks, pass into the gas ammonia of 0.2 ~ 0.4MPa, the slip obtained with step (2) stirs in three grades of tempering tanks, at the temperature of the pressure of 0.6 ~ 1.5MPa and 140 ~ 170 DEG C, heating 10 ~ 30 minutes, regulates the pH value of above-mentioned slip be 4.2 ~ 5.5 and it is delivered to tablets press by pipeline;
(4) on three grades of slurry pipeline transport pipelines between tempering tank and tablets press, arrange a gas ammonia to send into mouth, pass into the gas ammonia of 0.2 ~ 0.4MPa; the pH value of the slip that further regulating step (3) is obtained is 4.5 ~ 6.0; material by tablets press spray, is condensed in above-mentioned slip droplets fall process with after the freezing air heat exchange of rising, cools and form granular high tower nitro-compound fertilizer in prilling tower.
The device of described production high tower nitro-compound fertilizer; comprise the one-level tempering tank, secondary tempering tank, three grades of tempering tanks and the tablets press that are connected successively by pipeline; raw material in one-level tempering tank and secondary tempering tank after mix and blend, obtained high tower nitro-compound fertilizer slip; tablets press is arranged in prilling tower and three grades of tempering tanks described in middle and upper part is provided with gas ammonia feeding mouth, passes into gas ammonia; neutralization reaction is carried out in acid residual in high tower nitro-compound fertilizer slip in gas ammonia and three grades of tempering tanks, regulates its pH value.
Described three grades of pipelines between tempering tank and tablets press arrange gas ammonia send into mouth, pass into gas ammonia, high tower nitro-compound fertilizer slip in transport process, wherein residual acid further with gas ammonia neutralization reaction, regulate its pH value further.
Described three grades of tempering tanks are sent into mouth with the gas ammonia that three grades of pipelines between tempering tank and tablets press are arranged, are connected ammonia source, battery limit (BL) by gas ammonia line of pipes; This gas ammonia line of pipes comprises 1 tunnel mother's pipe of being connected as one by threeway and the 2 roads arm that walks abreast forms; the gas ammonia that 2 road arms connect on three grades of tempering tanks and three grades of pipelines between tempering tank and tablets press respectively sends into mouth, and female pipe and 2 road arms are respectively arranged with variable valve.
Described mother's pipe is sent on the arm of mouth with the gas ammonia be connected on three grades of tempering tanks, is also parallel with an active redundancy pipeline, this active redundancy pipeline is provided with variable valve.
Described female pipe is provided with under meter.
The beneficial effect that the present invention produces is:
Adopt the pH value of the high tower nitro-compound fertilizer of the present invention's production after regulating, be 4.5 ~ 6.0, reduce the risk causing soil acidification after composite fertilizer uses, eliminate farm crop root system by the defect of burning.Device of the present invention does not need to set up main equipment, and existing equipment carries out simple transformation at once, energy-saving and emission-reduction, are beneficial to and use on a large scale and promote.
Accompanying drawing explanation
Fig. 1 is the schema that the present invention produces high tower nitro-compound fertilizer.
Shown in number in the figure: 1-one-level tempering tank, 2-secondary tempering tank, 3-tri-grades of tempering tanks, 4-tablets press, 5-one-level tempering tank motor, 6-secondary tempering tank motor, 7-tri-grades of tempering tank motors, 8-tablets press motor, 9-one-level tempering tank discharge valve, 10-secondary tempering tank discharge valve, 11-tri-grades of tempering tank discharge valves, 12-tri-grades of tempering tanks are exported to tablets press slip trip valve, 13-gas ammonia under meter, 1-1-ammonium nitrate enters one-level tempering tank pipeline, 1-2-monoammonium phosphate powder enters one-level tempering tank pipeline, 1-3-one-level tempering tank water charge line, 1-4-one-level tempering tank dedusting pipeline, 1-5-one-level tempering tank insulation jacket vapour line, 1-6-one-level tempering tank heating steam pipeline, 1-7-one-level tempering tank slip is to secondary tempering tank pipeline, 1-8-one-level tempering tank bottom discharge pipeline, 1-9-one-level tempering tank jacket heat-preservation steam condensate pipeline, 1-10-one-level tempering tank heating steam phlegma pipeline, 2-1-potassium sulfate powder enters secondary tempering tank pipeline, 2-2-secondary tempering tank water charge line, 2-3-secondary tempering tank dedusting pipeline, 2-4-secondary tempering tank insulation jacket vapour line, 2-5-secondary tempering tank heating steam pipeline, 2-6-secondary tempering tank slip to three grade tempering tank pipeline, 2-7-secondary tempering tank bottom discharge pipeline, 2-8-secondary tempering tank jacket heat-preservation steam condensate pipeline, 2-9-secondary tempering tank heating steam phlegma pipeline, 3-1-tri-grades of tempering tank water charge lines, 3-2-tri-grades of tempering tank dedusting pipelines, 3-3-tri-grades of tempering tank insulation jacket vapour lines, 3-4-tri-grades of tempering tank slips are to tablets press pipeline, 3-5-tri-grades of tempering tank bottom discharge pipelines, 3-6-tri-grades of tempering tank jacket heat-preservation steam condensate pipelines, 3-7-tri-grades of tempering tank heating steam phlegma pipelines, 3-8-tri-grades of tempering tank heating steam pipelines, the female pipe of 14-1-gas ammonia conveying, 14-2-tri-grades of tempering tank slips add gas ammonia arm, before 14-3-tablets press, slip adds gas ammonia arm, 14-4-tri-grades of tempering tank slips add gas ammonia active redundancy pipeline.
Embodiment
As shown in Figure 1, the present invention is a kind of method of producing high tower nitro-compound fertilizer, and feed composition and the weight ratio thereof of described production high tower nitro-compound fertilizer are: the ammonium nitrate of 30 ~ 90%, the monoammonium phosphate of 10 ~ 50%, 0% ~ 55% potassium sulfate and/or Repone K.
If the raw material producing high tower nitro-compound fertilizer is potassium sulfate and/or Repone K, ammonium nitrate and monoammonium phosphate, then the method for producing this high tower nitro-compound fertilizer comprises following concrete steps:
(1) by pH value be 4.0 ~ 5.0 melting ammonium nitrate, pH value be 3.5 ~ 4.5 monoammonium phosphate send into one-level tempering tank 1, above-mentioned material is stirred in one-level tempering tank 1, heating 10 ~ 30 minutes at the temperature of the pressure of 0.6 ~ 1.5MPa and 140 ~ 170 DEG C, obtained nitrogen, the phosphorus slip (NP slip) delivered to secondary tempering tank 2 mixed;
In this embodiment, one-level tempering tank 1 is also added with returning charge.In the finished product high tower nitro-compound fertilizer particle that returning charge obtains in step (4), the underproof macroparticle of screening process and small-particle, namely size is greater than standard value or is less than the high tower nitro-compound fertilizer particle of standard value.These underproof macroparticles and small-particle are returned one-level tempering tank 1 again and re-starts slurrying operation.
(2) by pH value be 2.5 ~ 3.5 potassium sulfate and/or the obtained nitrogen of Repone K and step (1), phosphorus slip (NP slip) stir in secondary tempering tank 2, heating 10 ~ 30 minutes at the temperature of the pressure of 0.6 ~ 1.5MPa and 140 ~ 170 DEG C, obtained that mix, pH value is nitrogen, phosphorus, the potassium slip (NPK slip) delivered to three grades of tempering tanks 3 of 3.5 ~ 4.0;
In this step, in secondary tempering tank 2: only can send into a kind of raw material of potassium sulfate, only can send into a kind of raw material of Repone K, also can send into potassium sulfate and Repone K two kinds of raw materials simultaneously; But ensure that the potassium sulfate that adds and/or Repone K meet said components proportioning.
(3) in three grades of tempering tanks 3, pass into the gas ammonia of 0.2 ~ 0.4MPa, the nitrogen obtained with step (2), phosphorus, potassium slip (NPK slip) stir in three grades of tempering tanks 3, at the temperature of the pressure of 0.6 ~ 1.5MPa and 140 ~ 170 DEG C, heating 10 ~ 30 minutes, regulates the pH value of above-mentioned nitrogen, phosphorus, potassium slip (NPK slip) be 4.2 ~ 5.5 and it is delivered to prilling tower by three grades of tempering tank slips to tablets press pipeline 3-4;
(4) at three grades of tempering tank slips to tablets press pipeline 3-4(and delivery of nitrogen, phosphorus, potassium slip (NPK slip) to the pipeline of tablets press 4) on a gas ammonia is set sends into mouth, pass into the gas ammonia of 0.2 ~ 0.4MPa, the pH value regulating nitrogen, phosphorus, potassium slip (NPK slip) is further 4.5 ~ 6.0; Material spray in prilling tower by tablets press 4, condenses, cools and form granular high tower nitro-compound fertilizer in above-mentioned nitrogen, phosphorus, potassium slip (NPK slip) droplets fall process with after the freezing air heat exchange of rising.
If the raw material producing high tower nitro-compound fertilizer is ammonium nitrate and monoammonium phosphate, then the method for producing this high tower nitro-compound fertilizer comprises following concrete steps:
(1) by pH value be 4.0 ~ 5.0 melting ammonium nitrate, pH value be 3.5 ~ 4.5 monoammonium phosphate send into one-level tempering tank 1, above-mentioned material is stirred in one-level tempering tank 1, heating 10 ~ 30 minutes at the temperature of the pressure of 0.6 ~ 1.5MPa and 140 ~ 170 DEG C, obtained nitrogen, the phosphorus slip (NP slip) delivered to secondary tempering tank 2 mixed;
(2) nitrogen obtained for step (1), phosphorus slip (NP slip) are continued to stir in secondary tempering tank 2, heating 10 ~ 30 minutes at the temperature of the pressure of 0.6 ~ 1.5MPa and 140 ~ 170 DEG C, obtained that mix, pH value is nitrogen, the phosphorus slip (NP slip) delivered to three grades of tempering tanks 3 of 3.8 ~ 4.8;
(3) in three grades of tempering tanks 3, pass into the gas ammonia of 0.2 ~ 0.4MPa, the nitrogen obtained with step (2), phosphorus slip (NP slip) stir in three grades of tempering tanks 3, heating 10 ~ 30 minutes at the temperature of the pressure of 0.6 ~ 1.5MPa and 140 ~ 170 DEG C, regulates above-mentioned nitrogen, the pH value of phosphorus slip (NP slip) is 4.2 ~ 5.5 and it is delivered to tablets press 4 by three grades of tempering tank slips to tablets press pipeline 3-4;
(4) at three grades of tempering tank slips to tablets press pipeline 3-4(and delivery of nitrogen, phosphorus slip (NP slip) to the pipeline of tablets press 4) on a gas ammonia is set sends into mouth, pass into the gas ammonia of 0.2 ~ 0.4MPa, regulate nitrogen further, the pH value of phosphorus slip (NP slip) be 4.5 ~ 6.0; Material spray in prilling tower by tablets press 4, condenses, cools and form granular high tower nitro-compound fertilizer in above-mentioned nitrogen, phosphorus slip (NP slip) droplets fall process with after the freezing air heat exchange of rising.
The present invention produces the device of high tower nitro-compound fertilizer, comprises the one-level tempering tank 1, secondary tempering tank 2, three grades of tempering tanks 3 and the tablets press 4 that are connected successively by pipeline.Raw material in one-level tempering tank 1 and secondary tempering tank 2 after mix and blend, obtained high tower nitro-compound fertilizer slip, tablets press 4 is arranged on middle and upper part in prilling tower.Innovation of the present invention is: on three grades of tempering tanks 3, be provided with gas ammonia send into mouth, pass into gas ammonia, the sour neutralization reaction remained in high tower nitro-compound fertilizer slip in gas ammonia and three grades of tempering tanks 3, regulates its pH value.Pipeline between three grades of tempering tanks 3 and tablets press 4 is arranged gas ammonia to send into mouth, pass into gas ammonia, acid residual in high tower nitro-compound fertilizer slip in transport process, further with gas ammonia neutralization reaction, regulate its pH value further.
The gas ammonia that above-mentioned three grades of tempering tanks 3 and the pipeline between three grades of tempering tanks 3 and tablets press 4 are arranged sends into mouth, connects ammonia source, battery limit (BL) by gas ammonia line of pipes.This gas ammonia line of pipes comprises 1 tunnel mother's pipe of being connected as one by threeway and the 2 roads arm that walks abreast forms; respectively called after: gas ammonia carries female pipe 14-1, three grades of tempering tank slips add gas ammonia arm 14-2 and tablets press before slip add gas ammonia arm 14-3; gas ammonia carries female pipe 14-1 to connect ammonia source, battery limit (BL), and 2 road arm 14-2 and 14-3 connect three grades of tempering tanks 3 and three grades of tempering tank slips respectively to the pipeline between tablets press pipeline 3-4(tri-grades of tempering tanks 3 and tablets press 4) on gas ammonia send into mouth.Gas ammonia carries female pipe 14-1, three grades of tempering tank slips add gas ammonia arm 14-2 and tablets press before slip add on gas ammonia arm 14-3 and be respectively arranged with variable valve, thus independently can regulate flow wherein.Gas ammonia is carried on female pipe 14-1 and is provided with gas ammonia under meter 13, the gas ammonia data on flows passed into can be read or deliver to control unit.
Gas ammonia carries female pipe 14-1 and three grade tempering tank slip to add on gas ammonia arm 14-2, is also parallel with three grades of tempering tank slips and adds gas ammonia active redundancy pipeline 14-4, and these three grades of tempering tank slips add on gas ammonia active redundancy pipeline 14-4 and are provided with variable valve.
In embodiment as shown in Figure 1, in one-level tempering tank 1: by ammonium nitrate enter one-level tempering tank pipeline 1-1 send into molten ammonium nitrate, to be entered one-level tempering tank pipeline 1-2 by monoammonium phosphate powder and send into monoammonium phosphate powder, drive stirrer by one-level tempering tank motor 5, one-level tempering tank heating steam pipeline 1-6 passes into heating steam, make the heating 10 ~ 30 minutes at the temperature of the pressure of 0.6 ~ 1.5MPa and 140 ~ 170 DEG C of above-mentioned material, obtained nitrogen, phosphorus slip (NP slip).
In secondary tempering tank 2: sent into NP slip by one-level tempering tank slip to secondary tempering tank pipeline 1-7, entered secondary tempering tank pipeline 2-1 feeding potassium sulfate by potassium sulfate powder, drive stirrer by secondary tempering tank motor 6, secondary tempering tank heating steam pipeline 2-5 passes into heating steam, make the heating 10 ~ 30 minutes at the temperature of the pressure of 0.6 ~ 1.5MPa and 140 ~ 170 DEG C of above-mentioned material, obtained pH value is nitrogen, phosphorus, the potassium slip (NPK slip) of 3.5 ~ 4.0.
In three grades of tempering tanks 3: send into NPK slip by secondary tempering tank slip to three grade tempering tank pipeline 2-6, add gas ammonia arm 14-2 by three grades of tempering tank slips and pass into gas ammonia, drive stirrer by three grades of tempering tank motors 7, three grades of tempering tank heating steam pipeline 3-8 pass into heating steam, make the heating 10 ~ 30 minutes at the temperature of the pressure of 0.6 ~ 1.5MPa and 140 ~ 170 DEG C of above-mentioned material, gas ammonia and material neutralization reaction, obtained pH value is the NPK slip of 4.2 ~ 5.5.
Three grades of tempering tank slips are on tablets press pipeline 3-4: add gas ammonia arm 14-3 by slip before tablets press and pass into gas ammonia, with the NPK slip neutralization reaction of delivered inside, regulate the NPK slip pH value sending into tablets press 4 to be 4.5 ~ 6.0 further.
Done work by tablets press motor 8, tablets press 4 by NPK slip be spurting spray in prilling tower, condense in NPK slip droplets fall process with after the freezing air heat exchange of rising, cool and form granular high tower nitro-compound fertilizer; It is 4.5 ~ 6.0 that this high tower nitro-compound fertilizer finished particle measures the pH value drawn under the condition of 10% aqueous solution, temperature 25 DEG C.
Embodiment one
In this embodiment, feed composition and the weight ratio thereof of producing high tower nitro-compound fertilizer are: ammonium nitrate 35%, monoammonium phosphate 13%, potassium sulfate 52%.
Adopt the production method of the high tower nitro-compound fertilizer of above component, comprise following concrete steps:
(1) melting ammonium nitrate, monoammonium phosphate are sent in one-level tempering tank 1 and stirred, at the temperature of the pressure of 1.3MPa and 165 DEG C, heat about 30 minutes, obtained NP slip;
(2) potassium sulfate and above-mentioned NP slip are stirred in secondary tempering tank 2, at the temperature of the pressure of 1.3MPa and 165 DEG C, heat about 20 minutes, obtained NPK slip;
(3) in three grades of tempering tanks 3, pass into the gas ammonia of 0.4MPa, stirred in three grades of tempering tanks 3 by above-mentioned NPK slip, at the temperature of the pressure of about 1.3MPa and 165 DEG C, heat about 15 minutes, the pH value regulating NPK slip is 4.2 ~ 5.5;
(4) on three grades of tempering tank slips to tablets press pipeline 3-4, pass into the gas ammonia of 0.4MPa; the pH value of further adjustment NPK slip is 4.5 ~ 6.0; NPK slip sprays in prilling tower by tablets press 4, condenses, cools and form granular high tower nitro-compound fertilizer in NPK slip droplets fall process with after the freezing air heat exchange of rising.
Embodiment two
In this embodiment, feed composition and the weight ratio thereof of producing high tower nitro-compound fertilizer are: ammonium nitrate 61.5%, monoammonium phosphate 30.5%, Repone K 8%.
Adopt the production method of the high tower nitro-compound fertilizer of above component, comprise following concrete steps:
(1) melting ammonium nitrate, monoammonium phosphate are sent in one-level tempering tank 1 and stirred, at the temperature of the pressure of 1.2MPa and 165 DEG C, heat about 30 minutes, obtained NP slip;
(2) Repone K and above-mentioned NP slip are stirred in secondary tempering tank 2, at the temperature of the pressure of 1.2MPa and 165 DEG C, heat about 20 minutes, obtained NPK slip;
(3) in three grades of tempering tanks 3, pass into the gas ammonia of about 0.3MPa, stirred in three grades of tempering tanks 3 by above-mentioned NPK slip, at the temperature of the pressure of 1.2MPa and 165 DEG C, heat about 15 minutes, the pH value regulating NPK slip is 4.2 ~ 5.5;
(4) on three grades of tempering tank slips to tablets press pipeline 3-4, pass into the gas ammonia of 0.3MPa; the pH value of further adjustment NPK slip is 4.5 ~ 6.0; NPK slip sprays in prilling tower by tablets press 4, condenses, cools and form granular high tower nitro-compound fertilizer in NPK slip droplets fall process with after the freezing air heat exchange of rising.
Embodiment three
In this embodiment, feed composition and the weight ratio thereof of producing high tower nitro-compound fertilizer are: ammonium nitrate 61%, monoammonium phosphate 20.5%, potassium sulfate and Repone K 18.5%.
Adopt the production method of the high tower nitro-compound fertilizer of above component, comprise following concrete steps:
(1) melting ammonium nitrate, monoammonium phosphate are sent in one-level tempering tank 1 and stirred, at the temperature of the pressure of 1.2MPa and 165 DEG C, heat about 30 minutes, obtained NP slip;
(2) potassium sulfate and Repone K and above-mentioned NP slip are stirred in secondary tempering tank 2, at the temperature of the pressure of 1.2MPa and 165 DEG C, heat about 20 minutes, obtained NPK slip;
(3) in three grades of tempering tanks 3, pass into the gas ammonia of 0.3MPa, stirred in three grades of tempering tanks 3 by above-mentioned NPK slip, at the temperature of the pressure of 1.2MPa and 165 DEG C, heat about 15 minutes, the pH value regulating NPK slip is 4.2 ~ 5.5;
(4) on three grades of tempering tank slips to tablets press pipeline 3-4, pass into the gas ammonia of 0.3MPa; the pH value of further adjustment NPK slip is 4.5 ~ 6.0; NPK slip sprays in prilling tower by tablets press 4, condenses, cools and form granular high tower nitro-compound fertilizer in NPK slip droplets fall process with after the freezing air heat exchange of rising.
Embodiment four
In this embodiment, feed composition and the weight ratio thereof of producing high tower nitro-compound fertilizer are: ammonium nitrate 90%, monoammonium phosphate 10%.
Adopt the production method of the high tower nitro-compound fertilizer of above component, comprise following concrete steps:
(1) melting ammonium nitrate, monoammonium phosphate are sent in one-level tempering tank 1 and stirred, at the temperature of the pressure of 0.6MPa and 155 DEG C, heat about 20 minutes, obtained NP slip;
(2) above-mentioned NP slip stirs in secondary tempering tank 2, at the temperature of the pressure of 0.6MPa and 155 DEG C, heat about 20 minutes, obtained NP slip;
(3) in three grades of tempering tanks 3, pass into the gas ammonia of 0.2MPa, stirred in three grades of tempering tanks 3 by above-mentioned NP slip, at the temperature of the pressure of 0.6MPa and 155 DEG C, heat about 15 minutes, the pH value regulating NP slip is 4.2 ~ 5.5;
(4) on three grades of tempering tank slips to tablets press pipeline 3-4, pass into the gas ammonia of 0.2MPa; the pH value of further adjustment NP slip is 4.5 ~ 6.0; NP slip sprays in prilling tower by tablets press 4, condenses, cools and form granular high tower nitro-compound fertilizer in NP slip droplets fall process with after the freezing air heat exchange of rising.
Embodiment five
In this embodiment, feed composition and the weight ratio thereof of producing high tower nitro-compound fertilizer are: ammonium nitrate 50%, monoammonium phosphate 50%, potassium sulfate 8%.
Adopt the production method of the high tower nitro-compound fertilizer of above component, comprise following concrete steps:
(1) melting ammonium nitrate, monoammonium phosphate are sent in one-level tempering tank 1 and stirred, at the temperature of the pressure of 1.2MPa and 165 DEG C, heat about 20 minutes, obtained NP slip;
(2) above-mentioned NP slip stirs in secondary tempering tank 2, at the temperature of the pressure of 1.2MPa and 165 DEG C, heat about 20 minutes, obtained NP slip;
(3) in three grades of tempering tanks 3, pass into the gas ammonia of 0.3MPa, stirred in three grades of tempering tanks 3 by above-mentioned NPK slip, at the temperature of the pressure of 1.2MPa and 165 DEG C, heat about 15 minutes, the pH value regulating NPK slip is 4.2 ~ 5.5;
(4) on three grades of tempering tank slips to tablets press pipeline 3-4, pass into the gas ammonia of 0.3MPa; the pH value of further adjustment NPK slip is 4.5 ~ 6.0; NPK slip sprays in prilling tower by tablets press 4, condenses, cools and form granular high tower nitro-compound fertilizer in NPK slip droplets fall process with after the freezing air heat exchange of rising.
Claims (8)
1. produce a method for high tower nitro-compound fertilizer, it is characterized in that, feed composition and the weight ratio thereof of described production high tower nitro-compound fertilizer are: the ammonium nitrate of 30 ~ 90%, the monoammonium phosphate of 10 ~ 50%, 0% ~ 55% potassium sulfate and/or Repone K.
2. produce the method for high tower nitro-compound fertilizer according to claim 1, it is characterized in that, the raw material of described production high tower nitro-compound fertilizer is potassium sulfate and/or Repone K, ammonium nitrate and monoammonium phosphate, then the method for producing this high tower nitro-compound fertilizer comprises following concrete steps:
(1) by pH value be 4.0 ~ 5.0 melting ammonium nitrate, pH value be 3.5 ~ 4.5 monoammonium phosphate send into one-level tempering tank, above-mentioned material is stirred in one-level tempering tank, at the temperature of the pressure of 0.6 ~ 1.5MPa and 140 ~ 170 DEG C, heating is after 10 ~ 30 minutes, and the slip mixed is delivered to secondary tempering tank;
(2) by pH value be 2.5 ~ 3.5 potassium sulfate and/or the obtained slip of Repone K and step (1) stir in secondary tempering tank, at the temperature of the pressure of 0.6 ~ 1.5MPa and 140 ~ 170 DEG C, heating is after 10 ~ 30 minutes, by mix, pH value be 3.5 ~ 4.0 slip deliver to three grades of tempering tanks;
(3) in three grades of tempering tanks, pass into the gas ammonia of 0.2 ~ 0.4MPa, the slip obtained with step (2) stirs in three grades of tempering tanks, at the temperature of the pressure of 0.6 ~ 1.5MPa and 140 ~ 170 DEG C, heating is after 10 ~ 30 minutes, regulates the pH value of above-mentioned slip be 4.2 ~ 5.5 and it is delivered to tablets press by pipeline;
(4) on three grades of slurry pipeline transport pipelines between tempering tank and tablets press, arrange a gas ammonia to send into mouth, pass into the gas ammonia of 0.2 ~ 0.4MPa; the pH value of the slip that further regulating step (3) is obtained is 4.5 ~ 6.0; material by tablets press spray, is condensed in above-mentioned slip droplets fall process with after the freezing air heat exchange of rising, cools and form granular high tower nitro-compound fertilizer in prilling tower.
3. produce the method for high tower nitro-compound fertilizer according to claim 1, it is characterized in that, the raw material of described production high tower nitro-compound fertilizer is ammonium nitrate and monoammonium phosphate, then the method for producing this high tower nitro-compound fertilizer comprises following concrete steps:
(1) by pH value be 4.0 ~ 5.0 melting ammonium nitrate, pH value be 3.5 ~ 4.5 monoammonium phosphate send into one-level tempering tank, above-mentioned material is stirred in one-level tempering tank, at the temperature of the pressure of 0.6 ~ 1.5MPa and 140 ~ 170 DEG C, heating is after 10 ~ 30 minutes, and the slip mixed is delivered to secondary tempering tank;
(2) slip obtained for step (1) is continued to stir in secondary tempering tank, heat 10 ~ 30 minutes at the temperature of the pressure of 0.6 ~ 1.5MPa and 140 ~ 170 DEG C after, by mix, pH value be 3.8 ~ 4.8 slip deliver to three grades of tempering tanks;
(3) in three grades of tempering tanks, pass into the gas ammonia of 0.2 ~ 0.4MPa, the slip obtained with step (2) stirs in three grades of tempering tanks, at the temperature of the pressure of 0.6 ~ 1.5MPa and 140 ~ 170 DEG C, heating 10 ~ 30 minutes, regulates the pH value of above-mentioned slip be 4.2 ~ 5.5 and it is delivered to tablets press by pipeline;
(4) on three grades of slurry pipeline transport pipelines between tempering tank and tablets press, arrange a gas ammonia to send into mouth, pass into the gas ammonia of 0.2 ~ 0.4MPa; the pH value of the slip that further regulating step (3) is obtained is 4.5 ~ 6.0; material by tablets press spray, is condensed in above-mentioned slip droplets fall process with after the freezing air heat exchange of rising, cools and form granular high tower nitro-compound fertilizer in prilling tower.
4. according to Claims 2 or 3, produce the device of high tower nitro-compound fertilizer, comprise the one-level tempering tank, secondary tempering tank, three grades of tempering tanks and the tablets press that are connected successively by pipeline, raw material in one-level tempering tank and secondary tempering tank after mix and blend, obtained high tower nitro-compound fertilizer slip, tablets press is arranged on middle and upper part in prilling tower; It is characterized in that, described three grades of tempering tanks are provided with gas ammonia and send into mouth, pass into gas ammonia, neutralization reaction is carried out in the acid remained in the high tower nitro-compound fertilizer slip in gas ammonia and three grades of tempering tanks, regulates its pH value.
5. produce the device of high tower nitro-compound fertilizer according to claim 4; it is characterized in that; described three grades of pipelines between tempering tank and tablets press arrange gas ammonia send into mouth, pass into gas ammonia; high tower nitro-compound fertilizer slip is in transport process; wherein residual acid further with gas ammonia neutralization reaction, regulate its pH value further.
6. according to claim 4 or 5, produce the device of high tower nitro-compound fertilizer, it is characterized in that, described three grades of tempering tanks are sent into mouth with the gas ammonia that three grades of pipelines between tempering tank and tablets press are arranged, are connected ammonia source, battery limit (BL) by gas ammonia line of pipes; This gas ammonia line of pipes comprises 1 tunnel mother's pipe of being connected as one by threeway and the 2 roads arm that walks abreast forms; the gas ammonia that 2 road arms connect on three grades of tempering tanks and three grades of pipelines between tempering tank and tablets press respectively sends into mouth, and female pipe and 2 road arms are respectively arranged with variable valve.
7. produce the device of high tower nitro-compound fertilizer according to claim 6, it is characterized in that, described mother's pipe is sent on the arm of mouth with the gas ammonia be connected on three grades of tempering tanks, is also parallel with an active redundancy pipeline, this active redundancy pipeline is provided with variable valve.
8. produce the device of high tower nitro-compound fertilizer according to claim 6, it is characterized in that, described female pipe is provided with under meter.
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| 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 |
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| CN104496624B (en) | 2017-07-18 |
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