CN110128209B - High-tower compound fertilizer production device and production process - Google Patents
High-tower compound fertilizer production device and production process Download PDFInfo
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- CN110128209B CN110128209B CN201910512884.1A CN201910512884A CN110128209B CN 110128209 B CN110128209 B CN 110128209B CN 201910512884 A CN201910512884 A CN 201910512884A CN 110128209 B CN110128209 B CN 110128209B
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 280
- 239000003337 fertilizer Substances 0.000 title claims abstract description 279
- 150000001875 compounds Chemical class 0.000 title claims abstract description 118
- LFVGISIMTYGQHF-UHFFFAOYSA-N ammonium dihydrogen phosphate Chemical compound [NH4+].OP(O)([O-])=O LFVGISIMTYGQHF-UHFFFAOYSA-N 0.000 claims abstract description 135
- 229910000387 ammonium dihydrogen phosphate Inorganic materials 0.000 claims abstract description 135
- 239000006012 monoammonium phosphate Substances 0.000 claims abstract description 135
- 235000019837 monoammonium phosphate Nutrition 0.000 claims abstract description 135
- 239000007788 liquid Substances 0.000 claims abstract description 125
- 239000002994 raw material Substances 0.000 claims abstract description 85
- 238000003860 storage Methods 0.000 claims abstract description 56
- 239000002002 slurry Substances 0.000 claims abstract description 53
- 239000000706 filtrate Substances 0.000 claims abstract description 9
- 238000002156 mixing Methods 0.000 claims description 143
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 77
- 238000003825 pressing Methods 0.000 claims description 60
- 150000002828 nitro derivatives Chemical class 0.000 claims description 56
- 239000007787 solid Substances 0.000 claims description 43
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 claims description 38
- 239000004202 carbamide Substances 0.000 claims description 38
- 238000004090 dissolution Methods 0.000 claims description 27
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 26
- 230000001804 emulsifying effect Effects 0.000 claims description 26
- 238000002844 melting Methods 0.000 claims description 26
- 230000008018 melting Effects 0.000 claims description 26
- 238000000034 method Methods 0.000 claims description 24
- KMQAPZBMEMMKSS-UHFFFAOYSA-K calcium;magnesium;phosphate Chemical compound [Mg+2].[Ca+2].[O-]P([O-])([O-])=O KMQAPZBMEMMKSS-UHFFFAOYSA-K 0.000 claims description 21
- 239000000463 material Substances 0.000 claims description 21
- 239000000843 powder Substances 0.000 claims description 21
- 239000002893 slag Substances 0.000 claims description 20
- 238000003756 stirring Methods 0.000 claims description 20
- 235000013619 trace mineral Nutrition 0.000 claims description 15
- 239000011573 trace mineral Substances 0.000 claims description 15
- 229910052757 nitrogen Inorganic materials 0.000 claims description 13
- 238000005507 spraying Methods 0.000 claims description 13
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 claims description 11
- 239000011591 potassium Substances 0.000 claims description 11
- 229910052700 potassium Inorganic materials 0.000 claims description 11
- 238000005469 granulation Methods 0.000 claims description 10
- 230000003179 granulation Effects 0.000 claims description 10
- 238000011084 recovery Methods 0.000 claims description 8
- 239000004575 stone Substances 0.000 claims description 7
- OTYBMLCTZGSZBG-UHFFFAOYSA-L potassium sulfate Chemical compound [K+].[K+].[O-]S([O-])(=O)=O OTYBMLCTZGSZBG-UHFFFAOYSA-L 0.000 claims description 6
- 229910052939 potassium sulfate Inorganic materials 0.000 claims description 6
- 235000011151 potassium sulphates Nutrition 0.000 claims description 6
- 239000007921 spray Substances 0.000 claims description 6
- QJZYHAIUNVAGQP-UHFFFAOYSA-N 3-nitrobicyclo[2.2.1]hept-5-ene-2,3-dicarboxylic acid Chemical compound C1C2C=CC1C(C(=O)O)C2(C(O)=O)[N+]([O-])=O QJZYHAIUNVAGQP-UHFFFAOYSA-N 0.000 claims description 5
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 claims description 5
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 claims description 5
- 239000003795 chemical substances by application Substances 0.000 claims description 5
- 239000004021 humic acid Substances 0.000 claims description 5
- 229910017604 nitric acid Inorganic materials 0.000 claims description 5
- 239000002686 phosphate fertilizer Substances 0.000 claims description 5
- 229940072033 potash Drugs 0.000 claims description 5
- BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Substances [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 claims description 5
- 235000015320 potassium carbonate Nutrition 0.000 claims description 5
- 238000001914 filtration Methods 0.000 claims description 3
- 239000011574 phosphorus Substances 0.000 abstract description 15
- 229910052698 phosphorus Inorganic materials 0.000 abstract description 15
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 abstract description 14
- 239000000047 product Substances 0.000 abstract description 14
- 239000002351 wastewater Substances 0.000 description 7
- 238000004140 cleaning Methods 0.000 description 3
- 230000007547 defect Effects 0.000 description 3
- WCUXLLCKKVVCTQ-UHFFFAOYSA-M Potassium chloride Chemical compound [Cl-].[K+] WCUXLLCKKVVCTQ-UHFFFAOYSA-M 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 239000012752 auxiliary agent Substances 0.000 description 1
- 230000002860 competitive effect Effects 0.000 description 1
- 230000029087 digestion Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- -1 nitro-thio Chemical group 0.000 description 1
- 239000001103 potassium chloride Substances 0.000 description 1
- 235000011164 potassium chloride Nutrition 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000008399 tap water Substances 0.000 description 1
- 235000020679 tap water Nutrition 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05B—PHOSPHATIC FERTILISERS
- C05B7/00—Fertilisers based essentially on alkali or ammonium orthophosphates
-
- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05G—MIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENT SUBCLASSES OF CLASS C05; MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVING A SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES, SOIL-CONDITIONERS, WETTING AGENTS; FERTILISERS CHARACTERISED BY THEIR FORM
- C05G3/00—Mixtures of one or more fertilisers with additives not having a specially fertilising activity
-
- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05G—MIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENT SUBCLASSES OF CLASS C05; MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVING A SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES, SOIL-CONDITIONERS, WETTING AGENTS; FERTILISERS CHARACTERISED BY THEIR FORM
- C05G3/00—Mixtures of one or more fertilisers with additives not having a specially fertilising activity
- C05G3/80—Soil conditioners
-
- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05G—MIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENT SUBCLASSES OF CLASS C05; MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVING A SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES, SOIL-CONDITIONERS, WETTING AGENTS; FERTILISERS CHARACTERISED BY THEIR FORM
- C05G5/00—Fertilisers characterised by their form
- C05G5/20—Liquid fertilisers
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Pest Control & Pesticides (AREA)
- Soil Sciences (AREA)
- Fertilizers (AREA)
Abstract
The invention belongs to a high-tower compound fertilizer production device and a production process thereof; the liquid monoammonium phosphate production system is respectively connected with a liquid fertilizer production system, an industrial monoammonium phosphate production system and a compound fertilizer production system, the liquid monoammonium phosphate production system comprises a raw material hoister, the raw material hoister is connected with an inlet of a first dissolving tank through a metering scale, an outlet of the first dissolving tank is connected with a filter press through a first storage tank and a second centrifugal pump, a filter residue outlet of the filter press is connected with an inlet of a rotary drum device, and a filtrate outlet of the filter press is connected with the first centrifugal pump through a second storage tank; the first centrifugal pump is connected with the liquid fertilizer production system through a tee joint; the third end of the tee joint is respectively connected with an industrial monoammonium phosphate production system and a compound fertilizer production system through an evaporator on the tower; the device has the advantages of simple structure, reasonable design, improved slurry fluidity, reduced production difficulty, good sightseeing roundness of the compound fertilizer product, difficult blockage of the granulating nozzle and capability of effectively improving the phosphorus content.
Description
Technical Field
The invention belongs to the technical field of compound fertilizer production devices, and particularly relates to a high-tower compound fertilizer production device and a high-tower compound fertilizer production process.
Background
The existing high-tower compound fertilizer production device has the following defects in the actual production process: 1. only one granular fertilizer can be produced, the competitive advantage is not obvious, when the product types need to be changed, the whole equipment is required to be stopped, the equipment is idle, and the market demands cannot be met; 2. in the process of granulating by the spray nozzle, the slurry is relatively viscous and has poor fluidity, the production difficulty is high, the product appearance is poor, and the defect of blockage of the granulating spray nozzle is easily caused when the product appearance is serious. 3. The discharge problems of high tower condensate, high tower granulation nozzle cleaning water and the like cannot be solved; 4. the phosphorus content of the fertilizer is always at a low level, and the nitrogen content can only be sacrificed to solve the problem when the high-phosphorus compound fertilizer needs to be produced.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provide a high-tower compound fertilizer production device and a production process which have the advantages of simple structure, reasonable design, capability of realizing production of different types of fertilizers, such as common compound fertilizers, nitro compound fertilizers, liquid fertilizers, calcium magnesium phosphate fertilizers and industrial monoammonium phosphate, capability of effectively recycling waste water in the system, capability of improving the fluidity of slurry, capability of reducing the production difficulty, good sightseeing roundness of compound fertilizer products, difficult blockage of granulating spray heads and capability of effectively improving the phosphorus content.
The purpose of the invention is realized in the following way: the liquid monoammonium phosphate production system is respectively connected with a liquid fertilizer production system, an industrial monoammonium phosphate production system and a compound fertilizer production system, the liquid monoammonium phosphate production system comprises a raw material hoister, the raw material hoister is connected with an inlet of a first dissolving tank through a metering scale, an outlet of the first dissolving tank is connected with a filter press through a first storage tank and a second centrifugal pump, a filter residue outlet of the filter press is connected with an inlet of a rotary drum device, and a filtrate outlet of the filter press is connected with the first centrifugal pump through a second storage tank; a water inlet pipeline with a flowmeter is arranged on the first dissolving tank; the first centrifugal pump is connected with the liquid fertilizer production system through a tee joint; the third end of the tee joint is respectively connected with an industrial monoammonium phosphate production system and a compound fertilizer production system through an evaporator on the tower.
Preferably, the compound fertilizer production system comprises a common urea-based compound fertilizer production system and a nitro compound fertilizer production system.
Preferably, the common urea-based compound fertilizer production system comprises a front compound fertilizer production system, wherein the front compound fertilizer production system sequentially passes through an upper tower tank, a second dissolving tank, a first-stage mixing tank I, a second-stage mixing tank I and a first emulsifying machine to be connected with a first granulating nozzle arranged in a first granulating tower, and the first-stage mixing tank I and the second-stage mixing tank I are respectively connected with an evaporator on the tower.
Preferably, the nitro compound fertilizer production system comprises a front nitro compound fertilizer production system and a front nitro compound fertilizer production system which are sequentially connected with a melting tank, a primary mixing tank II, a secondary mixing tank II and a second emulsifying machine, and a second granulating nozzle arranged in the second granulating tower, wherein the melting tank is connected with an evaporator on the tower.
Preferably, the first centrifugal pump is connected with a liquid fertilizer raw material stirring tank in the liquid fertilizer production system.
Preferably, the on-tower evaporator is connected to a powder spraying tower in an industrial grade monoammonium phosphate production system.
Preferably, a steam coil is arranged in the first dissolving tank, the bottom of the steam coil is connected with a steam pipeline, and a condensate water recovery pipeline is arranged at the top of the steam coil.
The production process of the high-tower compound fertilizer production device comprises a production method of a common urea-based compound fertilizer, a production method of a nitro compound fertilizer, a production method of a liquid fertilizer and a production method of industrial monoammonium phosphate;
a. The production method of the common urea-based compound fertilizer comprises the following steps:
Step 1: enabling solid monoammonium phosphate to enter a first dissolving tank after being metered by a metering scale through a raw material lifting machine, enabling water in a water inlet pipeline to enter the first dissolving tank at the same time, and enabling steam to be introduced into a steam coil pipe to enable the solid monoammonium phosphate to be dissolved in the water in an accelerating mode, so that slurry is prepared;
step 2: the slurry enters a filter press through a first storage tank for filter pressing, and monoammonium phosphate slag after filter pressing enters a rotary drum device to be used as a raw material for producing calcium magnesium phosphate fertilizer;
Step 3: the clear liquid after filter pressing is sent into a first-stage mixing tank I and a second-stage mixing tank I through a second storage tank, a first centrifugal pump and an on-tower evaporator, urea solution or nitric acid solution in the on-tower tank sequentially enters the first-stage mixing tank I and the second-stage mixing tank I through a second dissolving tank, and is mixed with the clear liquid in the first-stage mixing tank I and the clear liquid in the second-stage mixing tank I to form slurry, and the slurry enters a first granulating tower through a first emulsifying machine and a first granulating nozzle to be granulated;
Step 4: adding potash fertilizer and auxiliary materials into the first-stage mixing tank I in the step 3 for mixing, and adding medium trace elements into the second-stage mixing tank I for mixing;
b. The production method of the nitro compound fertilizer comprises the following steps:
Step 1: enabling solid monoammonium phosphate to enter a first dissolving tank after being metered by a metering scale through a raw material lifting machine, enabling water in a water inlet pipeline to enter the first dissolving tank at the same time, and enabling steam to be introduced into a steam coil pipe to enable the solid monoammonium phosphate to be dissolved in the water in an accelerating mode, so that slurry is prepared;
step 2: the slurry enters a filter press through a first storage tank for filter pressing, and monoammonium phosphate slag after filter pressing enters a rotary drum device to be used as a raw material for producing calcium magnesium phosphate fertilizer;
Step 3: the clear liquid after press filtration is sent to an evaporator on the tower through a second storage tank and a first centrifugal pump to be evaporated and then is sent to a melting tank to be mixed with nitric phosphate fertilizer melt in a front nitrocompound fertilizer production system for use, and the mixed clear liquid enters a second granulation tower to be granulated through a first-stage mixing tank II, a second emulsifying machine and a second granulation spray nozzle in sequence;
Step 4: adding potassium sulfate, stone powder and auxiliary materials into the primary mixing tank II in the step 3 for mixing; adding trace elements and a plant conditioner into the secondary mixing tank II for mixing;
c. the production method of the liquid fertilizer comprises the following steps:
Step 1: enabling solid monoammonium phosphate to enter a first dissolving tank after being metered by a metering scale through a raw material lifting machine, enabling water in a water inlet pipeline to enter the first dissolving tank at the same time, and enabling steam to be introduced into a steam coil pipe to enable the solid monoammonium phosphate to be dissolved in the water in an accelerating mode, so that slurry is prepared;
step 2: the slurry enters a filter press through a first storage tank for filter pressing, and monoammonium phosphate slag after filter pressing enters a rotary drum device to be used as a raw material for producing calcium magnesium phosphate fertilizer;
Step 3: the clear liquid after press filtration is pumped into a liquid fertilizer raw material stirring tank through a second storage tank and a first centrifugal pump, and other water-soluble raw materials are added into the liquid fertilizer raw material stirring tank and are stirred to prepare a liquid fertilizer, wherein the other water-soluble raw materials comprise water-soluble nitrogen, water-soluble potassium, water-soluble medium trace elements, humic acid and plant production agents;
d. the production method of the industrial grade monoammonium phosphate comprises the following steps:
Step 1: enabling solid monoammonium phosphate to enter a first dissolving tank after being metered by a metering scale through a raw material lifting machine, enabling water in a water inlet pipeline to enter the first dissolving tank at the same time, and enabling steam to be introduced into a steam coil pipe to enable the solid monoammonium phosphate to be dissolved in the water in an accelerating mode, so that slurry is prepared;
step 2: the slurry enters a filter press through a first storage tank for filter pressing, and monoammonium phosphate slag after filter pressing enters a rotary drum device to be used as a raw material for producing calcium magnesium phosphate fertilizer;
step 3: and sending the clear liquid after filter pressing into a powder spraying tower through a second storage tank, a first centrifugal pump and an on-tower evaporator to prepare industrial monoammonium phosphate.
Preferably, the mass ratio of the water to the solid monoammonium phosphate in the step 1 is 1:1; the temperature of the material in the first dissolving tank is 75-90 ℃; and in the step 2, the filter pressing mesh number of the filter press is 400-800 meshes.
Preferably, in the step 3 of the common compound fertilizer production method, the concentration of the clear solution entering the primary mixing tank I and the secondary mixing tank I is 70-98%; the clear liquid concentration of the melting tank in the step 3 of the production method of the nitro compound fertilizer is 70-98%.
According to the high-tower compound fertilizer production device and the production process, the liquid monoammonium phosphate production system is arranged to dissolve solid monoammonium phosphate, so that a foundation is provided for the subsequent production of various fertilizers and industrial monoammonium phosphate; the drum device is arranged, so that monoammonium phosphate slag can be recycled, the purpose of producing calcium magnesium phosphate fertilizer can be achieved, the common compound fertilizer, the nitro compound fertilizer, the liquid fertilizer and the industrial monoammonium phosphate can be produced by arranging a liquid fertilizer production system, an industrial monoammonium phosphate production system and a compound fertilizer production system, and especially, the filter press can ensure that the product of the industrial monoammonium phosphate meets the relevant requirements, the water-soluble fertilizer can be completely dissolved without residue, and the fluidity of slurry during the production of the compound fertilizer can be improved, so that the purposes of reducing the production difficulty of the compound fertilizer, ensuring the beautiful appearance of the product, preventing the blockage of a granulating nozzle and improving the phosphorus content can be achieved; in particular, the water inlet pipeline can be connected with the waste water (such as high tower condensate, high tower granulation nozzle cleaning water and the like) pipeline in the system so as to achieve the aim of effectively solving the waste water discharge problem; the system has the advantages of simple structure, reasonable design, capability of realizing production and simultaneously or respectively producing common compound fertilizer, nitro compound fertilizer, liquid fertilizer, calcium magnesium phosphate fertilizer and industrial monoammonium phosphate, capability of effectively recycling waste water in the system, capability of improving fluidity of material slurry, capability of reducing production difficulty, good sightseeing roundness of compound fertilizer products, difficult blockage of a granulating nozzle and capability of effectively improving phosphorus content.
Drawings
Fig. 1 is a schematic structural view of the present invention.
Detailed Description
For a clearer understanding of the technical features, objects and effects of the present invention, embodiments of the present invention will now be described with reference to the drawings, in which like reference numerals refer to like parts throughout the various views. For simplicity of the drawing, only the parts relevant to the invention are schematically shown in each drawing, and they do not represent the actual structure thereof as a product.
As shown in fig. 1, the invention is a high-tower compound fertilizer production device and production process, wherein the production device comprises a liquid monoammonium phosphate production system which is respectively connected with a liquid fertilizer production system, an industrial monoammonium phosphate production system and a compound fertilizer production system, the liquid monoammonium phosphate production system comprises a raw material lifting machine 1, the raw material lifting machine 1 is connected with an inlet of a first dissolving tank 3 through a metering scale 2, an outlet of the first dissolving tank 3 is connected with a filter press 5 through a first storage tank 4 and a second centrifugal pump 32, a filter residue outlet of the filter press 5 is connected with an inlet of a rotary drum device 6, and a filtrate outlet of the filter press 5 is connected with a first centrifugal pump 8 through a second storage tank 7; a water inlet pipeline 30 with a flowmeter 31 is arranged on the first dissolving tank 3; the first centrifugal pump 8 is connected with the liquid fertilizer production system through a tee joint; the third end of the tee joint is respectively connected with an industrial monoammonium phosphate production system and a compound fertilizer production system through an on-tower evaporator 11.
Further, the compound fertilizer production system comprises a common urea-based compound fertilizer production system and a nitro compound fertilizer production system.
Further, the common urea-based compound fertilizer production system comprises a front compound fertilizer production system 9, wherein the front compound fertilizer production system 9 sequentially passes through an upper tower tank 10, a second dissolving tank 12, a first-stage mixing tank I13, a second-stage mixing tank I14 and a first emulsifying machine 15 to be connected with a first granulating nozzle 17 arranged in a first granulating tower 16, and the first-stage mixing tank I13 and the second-stage mixing tank I14 are respectively connected with an upper tower evaporator 11.
Further, the nitrocompound fertilizer production system comprises a front nitrocompound fertilizer production system 18, wherein the front nitrocompound fertilizer production system 18 is sequentially connected with a melting tank 19, a primary mixing tank II 20, a secondary mixing tank II 21 and a second emulsifying machine 22, and a second granulating nozzle 24 arranged in a second granulating tower 23, and the melting tank 19 is connected with the on-tower evaporator 11.
Further, the first centrifugal pump 8 is connected with a liquid fertilizer raw material stirring tank 25 in the liquid fertilizer production system.
Further, the on-tower evaporator 11 is connected to a powder spraying tower 26 in an industrial grade monoammonium phosphate production system.
Further, a steam coil 27 is arranged in the first dissolving tank 3, the bottom of the steam coil 27 is connected with a steam pipeline 28, and a condensate water recovery pipeline 29 is arranged at the top of the steam coil 27.
The production process of the high-tower compound fertilizer production device comprises a production method of a common urea-based compound fertilizer, a production method of a nitro compound fertilizer, a production method of a liquid fertilizer and a production method of industrial monoammonium phosphate;
a. The production method of the common urea-based compound fertilizer comprises the following steps:
Step 1: enabling solid monoammonium phosphate to enter a first dissolution tank 3 after being metered by a raw material lifting machine 1 into a metering scale 2, enabling water in a water inlet pipeline 30 to enter the first dissolution tank 3 at the same time, and enabling steam to be introduced into a steam coil 27, so that the solid monoammonium phosphate is dissolved in the water in an accelerating way, and preparing slurry;
Step 2: the slurry enters a filter press 5 through a first storage tank 4 for filter pressing, and monoammonium phosphate slag after filter pressing enters a rotary drum device 6 to be used as a raw material for producing calcium magnesium phosphate fertilizer;
Step 3: the clear liquid after filter pressing is sent into a first-stage mixing tank I13 and a second-stage mixing tank I14 through a second storage tank 7, a first centrifugal pump 8 and an on-tower evaporator 11, urea solution or nitric acid solution in an on-tower tank 10 sequentially enters the first-stage mixing tank I13 and the second-stage mixing tank I14 through a second dissolving tank 12, and is mixed with clear liquid in the first-stage mixing tank I13 and the second-stage mixing tank I14 to form slurry, and the slurry enters a first granulating tower 16 through a first emulsifying machine 15 and a first granulating nozzle 17 for granulating;
step 4: adding potash fertilizer and auxiliary materials into the first-stage mixing tank I13 of the step 3 for mixing, and adding medium and trace elements into the second-stage mixing tank I14 for mixing;
b. The production method of the nitro compound fertilizer comprises the following steps:
Step 1: enabling solid monoammonium phosphate to enter a first dissolution tank 3 after being metered by a raw material lifting machine 1 into a metering scale 2, enabling water in a water inlet pipeline 30 to enter the first dissolution tank 3 at the same time, and enabling steam to be introduced into a steam coil 27, so that the solid monoammonium phosphate is dissolved in the water in an accelerating way, and preparing slurry;
Step 2: the slurry enters a filter press 5 through a first storage tank 4 for filter pressing, and monoammonium phosphate slag after filter pressing enters a rotary drum device 6 to be used as a raw material for producing calcium magnesium phosphate fertilizer;
Step 3: the clear liquid after filter pressing is sent into an evaporator 11 on the tower through a second storage tank 7 and a first centrifugal pump 8 to be evaporated and then is sent into a melting tank 19 to be mixed with the nitric phosphate fertilizer melt in a front nitrocompound fertilizer production system 18 for use, and the mixed clear liquid enters a second granulating tower 23 to be granulated through a first-stage mixing tank II 20, a second-stage mixing tank II 21, a second emulsifying machine 22 and a second granulating nozzle 24 in sequence;
Step 4: adding potassium sulfate, stone powder and auxiliary materials into the primary mixing tank II 20 in the step 3 for mixing; adding trace elements and a plant conditioner into the secondary mixing tank II 21 for mixing;
c. the production method of the liquid fertilizer comprises the following steps:
Step 1: enabling solid monoammonium phosphate to enter a first dissolution tank 3 after being metered by a raw material lifting machine 1 into a metering scale 2, enabling water in a water inlet pipeline 30 to enter the first dissolution tank 3 at the same time, and enabling steam to be introduced into a steam coil 27, so that the solid monoammonium phosphate is dissolved in the water in an accelerating way, and preparing slurry;
Step 2: the slurry enters a filter press 5 through a first storage tank 4 for filter pressing, and monoammonium phosphate slag after filter pressing enters a rotary drum device 6 to be used as a raw material for producing calcium magnesium phosphate fertilizer;
step 3: the clear liquid after filter pressing is sent into a liquid fertilizer raw material stirring tank 25 through a second storage tank 7 and a first centrifugal pump 8, and other water-soluble raw materials are added into the liquid fertilizer raw material stirring tank 25 at the same time, and are stirred to prepare a liquid fertilizer, wherein the other water-soluble raw materials comprise water-soluble nitrogen, water-soluble potassium, water-soluble medium trace elements, humic acid and plant production agents;
d. the production method of the industrial grade monoammonium phosphate comprises the following steps:
Step 1: enabling solid monoammonium phosphate to enter a first dissolution tank 3 after being metered by a raw material lifting machine 1 into a metering scale 2, enabling water in a water inlet pipeline 30 to enter the first dissolution tank 3 at the same time, and enabling steam to be introduced into a steam coil 27, so that the solid monoammonium phosphate is dissolved in the water in an accelerating way, and preparing slurry;
Step 2: the slurry enters a filter press 5 through a first storage tank 4 for filter pressing, and monoammonium phosphate slag after filter pressing enters a rotary drum device 6 to be used as a raw material for producing calcium magnesium phosphate fertilizer;
step 3: the clear liquid after the filter pressing is sent into a powder spraying tower 26 through a second storage tank 7, a first centrifugal pump 8 and an on-tower evaporator 11 to prepare industrial monoammonium phosphate.
Further, the mass ratio of the water to the solid monoammonium phosphate in the step 1 is 1:1; the temperature of the materials in the first dissolving tank 3 is 75-90 ℃; and in the step 2, the filter pressing number of the filter press 5 is 400-800 meshes.
Further, in the step 3 of the common compound fertilizer production method, the concentration of the clear solution entering the first-stage mixing tank I13 and the second-stage mixing tank I14 is 70-98%; the clear liquid concentration of the melting tank 19 in the step 3 of the production method of the nitro compound fertilizer is 70-98%.
The water in the water inlet pipeline 30 can be the waste water in the system, such as: high tower condensate, high tower prilling spray head cleaning water, and the like, if the amount of waste water is insufficient, the waste water can be replenished by tap water; the first dissolving tank 3, the first-stage mixing tank I13, the second-stage mixing tank I14, the first-stage mixing tank II 20 and the second-stage mixing tank II 21 are respectively provided with stirring devices, so that rapid mixing of materials is facilitated; especially, the first dissolution tank 3 is internally provided with a heat exchange coil 27, monoammonium phosphate and water can be rapidly dissolved under the heating action of the heat exchange coil 27, and monoammonium phosphate solution is filtered through the filter press 5, so that clear liquid without residues is obtained, and the later preparation of industrial monoammonium phosphate and fertilizer is facilitated; the monoammonium phosphate slag is recycled through the rotary drum device, so that the monoammonium phosphate slag can be reused and can be used as a raw material for producing calcium magnesium phosphate fertilizer; in the subsequent process, the clear liquid enters different equipment to realize the production of common compound fertilizers, nitro compound fertilizers, liquid fertilizers and industrial monoammonium phosphate; the filter press can ensure the total solubility of the liquid fertilizer and the quality of the industrial monoammonium phosphate, and the fluidity of the slurry can be promoted by entering a compound fertilizer production system, so that the aim of reducing the production difficulty can be fulfilled, the effective content of phosphorus can be increased on the premise of not reducing the nitrogen content, and the effective content of phosphorus in the fertilizer is increased by 3-8%.
The invention will now be further illustrated with reference to examples for a more detailed explanation of the invention. Specific examples are as follows:
Example 1
The high-tower compound fertilizer production device comprises a liquid monoammonium phosphate production system which is respectively connected with a liquid fertilizer production system, an industrial monoammonium phosphate production system and a compound fertilizer production system, wherein the liquid monoammonium phosphate production system comprises a raw material lifting machine 1, the raw material lifting machine 1 is connected with an inlet of a first dissolving tank 3 through a metering scale 2, an outlet of the first dissolving tank 3 is connected with a filter press 5 through a first storage tank 4 and a second centrifugal pump 32, a filter residue outlet of the filter press 5 is connected with an inlet of a rotary drum device 6, and a filtrate outlet of the filter press 5 is connected with a first centrifugal pump 8 through a second storage tank 7; a water inlet pipeline 30 with a flowmeter 31 is arranged on the first dissolving tank 3; the first centrifugal pump 8 is connected with the liquid fertilizer production system through a tee joint; the third end of the tee joint is respectively connected with an industrial monoammonium phosphate production system and a compound fertilizer production system through an on-tower evaporator 11. The compound fertilizer production system comprises a common urea-based compound fertilizer production system and a nitro compound fertilizer production system. The common urea-based compound fertilizer production system comprises a front compound fertilizer production system 9, wherein the front compound fertilizer production system 9 sequentially passes through a tower upper tank 10, a second dissolving tank 12, a primary mixing tank I13, a secondary mixing tank I14 and a first emulsifying machine 15 to be connected with a first granulating nozzle 17 arranged in a first granulating tower 16, and the primary mixing tank I13 and the secondary mixing tank I14 are respectively connected with an upper evaporator 11. The nitrocompound fertilizer production system comprises a front nitrocompound fertilizer production system 18, wherein the front nitrocompound fertilizer production system 18 is sequentially connected with a melting tank 19, a primary mixing tank II 20, a secondary mixing tank II 21 and a second emulsifying machine 22, and a second granulating nozzle 24 arranged in a second granulating tower 23, and the melting tank 19 is connected with the evaporator 11 on the tower. The first centrifugal pump 8 is connected with a liquid fertilizer raw material stirring tank 25 in the liquid fertilizer production system. The on-tower evaporator 11 is connected to a powder spraying tower 26 in an industrial grade monoammonium phosphate production system. The first dissolving tank 3 is internally provided with a steam coil 27, the bottom of the steam coil 27 is connected with a steam pipeline 28, and the top of the steam coil 27 is provided with a condensate recovery pipeline 29.
The production process of the high-tower compound fertilizer production device comprises a production method of a common urea-based compound fertilizer, a production method of a nitro compound fertilizer, a production method of a liquid fertilizer and a production method of industrial monoammonium phosphate; when the common urea-based compound fertilizer, the nitro compound fertilizer, the liquid fertilizer and the industrial grade monoammonium phosphate are simultaneously produced according to the actual situation, the method comprises the following steps:
Step 1: enabling solid monoammonium phosphate to enter a first dissolution tank 3 after being metered by a raw material lifting machine 1 into a metering scale 2, enabling water in a water inlet pipeline 30 to enter the first dissolution tank 3 at the same time, and enabling steam to be introduced into a steam coil 27, so that the solid monoammonium phosphate is dissolved in the water in an accelerating way, and preparing slurry;
Step 2: the slurry enters a filter press 5 through a first storage tank 4 for filter pressing, and monoammonium phosphate slag after filter pressing enters a rotary drum device 6 to be used as a raw material for producing calcium magnesium phosphate fertilizer;
Step 3: the clear liquid after filter pressing is respectively sent into a common urea-based compound fertilizer production system, a nitro compound fertilizer production system, a liquid fertilizer production system and an industrial monoammonium phosphate production system through a second storage tank 7 and a first centrifugal pump 8;
Step 4: the clear liquid after filter pressing is sent into a first-stage mixing tank I13 and a second-stage mixing tank I14 through a second storage tank 7, a first centrifugal pump 8 and an on-tower evaporator 11, urea solution or nitric acid solution in an on-tower tank 10 sequentially enters the first-stage mixing tank I13 and the second-stage mixing tank I14 through a second dissolving tank 12, and is mixed with clear liquid in the first-stage mixing tank I13 and the second-stage mixing tank I14 to form slurry, and the slurry enters a first granulating tower 16 through a first emulsifying machine 15 and a first granulating nozzle 17 for granulating;
Step 5: adding potash fertilizer and auxiliary materials into a primary mixing tank I13 of the step 4 for mixing, and adding medium and trace elements into a secondary mixing tank I14 for mixing;
Step 6: the clear liquid after filter pressing is sent into an evaporator 11 on the tower through a second storage tank 7 and a first centrifugal pump 8 to be evaporated and then is sent into a melting tank 19 to be mixed with nitric phosphate fertilizer melt in a front nitric compound fertilizer production system 18 for use, and the mixed clear liquid sequentially enters a second granulation tower 23 through a first-stage mixing tank II 20, a second-stage mixing tank II 21, a second emulsifying machine 22 and a second granulation nozzle 24 for granulation to prepare the nitric compound fertilizer;
Step 7: adding potassium sulfate, stone powder and auxiliary materials into the primary mixing tank II 20 in the step 6 for mixing; adding trace elements and a plant conditioner into the secondary mixing tank II 21 for mixing;
Step 8: the clear liquid after filter pressing is sent into a liquid fertilizer raw material stirring tank 25 through a second storage tank 7 and a first centrifugal pump 8, and other water-soluble raw materials are added into the liquid fertilizer raw material stirring tank 25 at the same time, and are stirred to prepare a liquid fertilizer, wherein the other water-soluble raw materials comprise water-soluble nitrogen, water-soluble potassium, water-soluble medium trace elements, humic acid and plant production agents;
Step 9: the clear liquid after the filter pressing is sent into a powder spraying tower 26 through a second storage tank 7, a first centrifugal pump 8 and an on-tower evaporator 11 to prepare industrial monoammonium phosphate.
The mass ratio of the water to the solid monoammonium phosphate in the step 1 is 1:1; the temperature of the materials in the first dissolving tank 3 is 75-90 ℃; and in the step 2, the filter pressing number of the filter press 5 is 400-800 meshes. The concentration of clear liquid in the first-stage mixing tank I13 and the second-stage mixing tank I14 in the step 4 is 70-98%; the concentration of the clear liquid in the melting tank 19 in the step 6 is 70-98%.
Example 2
The high-tower compound fertilizer production device comprises a liquid monoammonium phosphate production system which is respectively connected with a liquid fertilizer production system, an industrial monoammonium phosphate production system and a compound fertilizer production system, wherein the liquid monoammonium phosphate production system comprises a raw material lifting machine 1, the raw material lifting machine 1 is connected with an inlet of a first dissolving tank 3 through a metering scale 2, an outlet of the first dissolving tank 3 is connected with a filter press 5 through a first storage tank 4 and a second centrifugal pump 32, a filter residue outlet of the filter press 5 is connected with an inlet of a rotary drum device 6, and a filtrate outlet of the filter press 5 is connected with a first centrifugal pump 8 through a second storage tank 7; a water inlet pipeline 30 with a flowmeter 31 is arranged on the first dissolving tank 3; the first centrifugal pump 8 is connected with the liquid fertilizer production system through a tee joint; the third end of the tee joint is respectively connected with an industrial monoammonium phosphate production system and a compound fertilizer production system through an on-tower evaporator 11. The compound fertilizer production system comprises a common urea-based compound fertilizer production system and a nitro compound fertilizer production system. The common urea-based compound fertilizer production system comprises a front compound fertilizer production system 9, wherein the front compound fertilizer production system 9 sequentially passes through a tower upper tank 10, a second dissolving tank 12, a primary mixing tank I13, a secondary mixing tank I14 and a first emulsifying machine 15 to be connected with a first granulating nozzle 17 arranged in a first granulating tower 16, and the primary mixing tank I13 and the secondary mixing tank I14 are respectively connected with an upper evaporator 11. The nitrocompound fertilizer production system comprises a front nitrocompound fertilizer production system 18, wherein the front nitrocompound fertilizer production system 18 is sequentially connected with a melting tank 19, a primary mixing tank II 20, a secondary mixing tank II 21 and a second emulsifying machine 22, and a second granulating nozzle 24 arranged in a second granulating tower 23, and the melting tank 19 is connected with the evaporator 11 on the tower. The first centrifugal pump 8 is connected with a liquid fertilizer raw material stirring tank 25 in the liquid fertilizer production system. The on-tower evaporator 11 is connected to a powder spraying tower 26 in an industrial grade monoammonium phosphate production system. The first dissolving tank 3 is internally provided with a steam coil 27, the bottom of the steam coil 27 is connected with a steam pipeline 28, and the top of the steam coil 27 is provided with a condensate recovery pipeline 29.
The production process of the high-tower compound fertilizer production device comprises a production method of a common urea-based compound fertilizer, and the production method comprises the following steps:
Step 1: enabling solid monoammonium phosphate to enter a first dissolution tank 3 after being metered by a raw material lifting machine 1 into a metering scale 2, enabling water in a water inlet pipeline 30 to enter the first dissolution tank 3 at the same time, and enabling steam to be introduced into a steam coil 27, so that the solid monoammonium phosphate is dissolved in the water in an accelerating way, and preparing slurry;
Step 2: the slurry enters a filter press 5 through a first storage tank 4 for filter pressing, and monoammonium phosphate slag after filter pressing enters a rotary drum device 6 to be used as a raw material for producing calcium magnesium phosphate fertilizer;
Step 3: the clear liquid after filter pressing is sent into a first-stage mixing tank I13 and a second-stage mixing tank I14 through a second storage tank 7, a first centrifugal pump 8 and an on-tower evaporator 11, urea solution or nitric acid solution in an on-tower tank 10 sequentially enters the first-stage mixing tank I13 and the second-stage mixing tank I14 through a second dissolving tank 12, and is mixed with clear liquid in the first-stage mixing tank I13 and the second-stage mixing tank I14 to form slurry, and the slurry enters a first granulating tower 16 through a first emulsifying machine 15 and a first granulating nozzle 17 for granulating;
Step 4: adding potash fertilizer and auxiliary materials into the first-stage mixing tank I13 of the step 3 for mixing, and adding medium and trace elements into the second-stage mixing tank I14 for mixing.
The mass ratio of the water to the solid monoammonium phosphate in the step 1 is 1:1; the temperature of the materials in the first dissolving tank 3 is 75-90 ℃; and in the step 2, the filter pressing number of the filter press 5 is 400-800 meshes. In the step 3 of the common compound fertilizer production method, the concentration of the clear liquid entering the primary mixing tank I13 and the secondary mixing tank I14 is 70-98%.
Example 3
The high-tower compound fertilizer production device comprises a liquid monoammonium phosphate production system which is respectively connected with a liquid fertilizer production system, an industrial monoammonium phosphate production system and a compound fertilizer production system, wherein the liquid monoammonium phosphate production system comprises a raw material lifting machine 1, the raw material lifting machine 1 is connected with an inlet of a first dissolving tank 3 through a metering scale 2, an outlet of the first dissolving tank 3 is connected with a filter press 5 through a first storage tank 4 and a second centrifugal pump 32, a filter residue outlet of the filter press 5 is connected with an inlet of a rotary drum device 6, and a filtrate outlet of the filter press 5 is connected with a first centrifugal pump 8 through a second storage tank 7; a water inlet pipeline 30 with a flowmeter 31 is arranged on the first dissolving tank 3; the first centrifugal pump 8 is connected with the liquid fertilizer production system through a tee joint; the third end of the tee joint is respectively connected with an industrial monoammonium phosphate production system and a compound fertilizer production system through an on-tower evaporator 11. The compound fertilizer production system comprises a common urea-based compound fertilizer production system and a nitro compound fertilizer production system. The common urea-based compound fertilizer production system comprises a front compound fertilizer production system 9, wherein the front compound fertilizer production system 9 sequentially passes through a tower upper tank 10, a second dissolving tank 12, a primary mixing tank I13, a secondary mixing tank I14 and a first emulsifying machine 15 to be connected with a first granulating nozzle 17 arranged in a first granulating tower 16, and the primary mixing tank I13 and the secondary mixing tank I14 are respectively connected with an upper evaporator 11. The nitrocompound fertilizer production system comprises a front nitrocompound fertilizer production system 18, wherein the front nitrocompound fertilizer production system 18 is sequentially connected with a melting tank 19, a primary mixing tank II 20, a secondary mixing tank II 21 and a second emulsifying machine 22, and a second granulating nozzle 24 arranged in a second granulating tower 23, and the melting tank 19 is connected with the evaporator 11 on the tower. The first centrifugal pump 8 is connected with a liquid fertilizer raw material stirring tank 25 in the liquid fertilizer production system. The on-tower evaporator 11 is connected to a powder spraying tower 26 in an industrial grade monoammonium phosphate production system. The first dissolving tank 3 is internally provided with a steam coil 27, the bottom of the steam coil 27 is connected with a steam pipeline 28, and the top of the steam coil 27 is provided with a condensate recovery pipeline 29.
The production process of the high-tower compound fertilizer production device comprises a production method of a nitro compound fertilizer, and the production method comprises the following steps:
Step 1: enabling solid monoammonium phosphate to enter a first dissolution tank 3 after being metered by a raw material lifting machine 1 into a metering scale 2, enabling water in a water inlet pipeline 30 to enter the first dissolution tank 3 at the same time, and enabling steam to be introduced into a steam coil 27, so that the solid monoammonium phosphate is dissolved in the water in an accelerating way, and preparing slurry;
Step 2: the slurry enters a filter press 5 through a first storage tank 4 for filter pressing, and monoammonium phosphate slag after filter pressing enters a rotary drum device 6 to be used as a raw material for producing calcium magnesium phosphate fertilizer;
Step 3: the clear liquid after filter pressing is sent into an evaporator 11 on the tower through a second storage tank 7 and a first centrifugal pump 8 to be evaporated and then is sent into a melting tank 19 to be mixed with the nitric phosphate fertilizer melt in a front nitrocompound fertilizer production system 18 for use, and the mixed clear liquid enters a second granulating tower 23 to be granulated through a first-stage mixing tank II 20, a second-stage mixing tank II 21, a second emulsifying machine 22 and a second granulating nozzle 24 in sequence;
Step 4: adding potassium sulfate, stone powder and auxiliary materials into the primary mixing tank II 20 in the step 3 for mixing; adding trace elements and a plant conditioner into the secondary mixing tank II 21 for mixing;
The mass ratio of the water to the solid monoammonium phosphate in the step 1 is 1:1; the temperature of the materials in the first dissolving tank 3 is 75-90 ℃; and in the step 2, the filter pressing number of the filter press 5 is 400-800 meshes. The clear liquid concentration of the melting tank 19 in the step 3 of the production method of the nitro compound fertilizer is 70-98%.
Example 4
The high-tower compound fertilizer production device comprises a liquid monoammonium phosphate production system which is respectively connected with a liquid fertilizer production system, an industrial monoammonium phosphate production system and a compound fertilizer production system, wherein the liquid monoammonium phosphate production system comprises a raw material lifting machine 1, the raw material lifting machine 1 is connected with an inlet of a first dissolving tank 3 through a metering scale 2, an outlet of the first dissolving tank 3 is connected with a filter press 5 through a first storage tank 4 and a second centrifugal pump 32, a filter residue outlet of the filter press 5 is connected with an inlet of a rotary drum device 6, and a filtrate outlet of the filter press 5 is connected with a first centrifugal pump 8 through a second storage tank 7; a water inlet pipeline 30 with a flowmeter 31 is arranged on the first dissolving tank 3; the first centrifugal pump 8 is connected with the liquid fertilizer production system through a tee joint; the third end of the tee joint is respectively connected with an industrial monoammonium phosphate production system and a compound fertilizer production system through an on-tower evaporator 11. The compound fertilizer production system comprises a common urea-based compound fertilizer production system and a nitro compound fertilizer production system. The common urea-based compound fertilizer production system comprises a front compound fertilizer production system 9, wherein the front compound fertilizer production system 9 sequentially passes through a tower upper tank 10, a second dissolving tank 12, a primary mixing tank I13, a secondary mixing tank I14 and a first emulsifying machine 15 to be connected with a first granulating nozzle 17 arranged in a first granulating tower 16, and the primary mixing tank I13 and the secondary mixing tank I14 are respectively connected with an upper evaporator 11. The nitrocompound fertilizer production system comprises a front nitrocompound fertilizer production system 18, wherein the front nitrocompound fertilizer production system 18 is sequentially connected with a melting tank 19, a primary mixing tank II 20, a secondary mixing tank II 21 and a second emulsifying machine 22, and a second granulating nozzle 24 arranged in a second granulating tower 23, and the melting tank 19 is connected with the evaporator 11 on the tower. The first centrifugal pump 8 is connected with a liquid fertilizer raw material stirring tank 25 in the liquid fertilizer production system. The on-tower evaporator 11 is connected to a powder spraying tower 26 in an industrial grade monoammonium phosphate production system. The first dissolving tank 3 is internally provided with a steam coil 27, the bottom of the steam coil 27 is connected with a steam pipeline 28, and the top of the steam coil 27 is provided with a condensate recovery pipeline 29.
The production process of the high-tower compound fertilizer production device comprises a production method of liquid fertilizer, and the production method comprises the following steps:
Step 1: enabling solid monoammonium phosphate to enter a first dissolution tank 3 after being metered by a raw material lifting machine 1 into a metering scale 2, enabling water in a water inlet pipeline 30 to enter the first dissolution tank 3 at the same time, and enabling steam to be introduced into a steam coil 27, so that the solid monoammonium phosphate is dissolved in the water in an accelerating way, and preparing slurry;
Step 2: the slurry enters a filter press 5 through a first storage tank 4 for filter pressing, and monoammonium phosphate slag after filter pressing enters a rotary drum device 6 to be used as a raw material for producing calcium magnesium phosphate fertilizer;
step 3: the clear liquid after filter pressing is sent into a liquid fertilizer raw material stirring tank 25 through a second storage tank 7 and a first centrifugal pump 8, and other water-soluble raw materials are added into the liquid fertilizer raw material stirring tank 25 at the same time, and are stirred to prepare a liquid fertilizer, wherein the other water-soluble raw materials comprise water-soluble nitrogen, water-soluble potassium, water-soluble medium trace elements, humic acid and plant production agents; the mass ratio of the water to the solid monoammonium phosphate in the step 1 is 1:1; the temperature of the materials in the first dissolving tank 3 is 75-90 ℃; and in the step 2, the filter pressing number of the filter press 5 is 400-800 meshes.
Example 5
The high-tower compound fertilizer production device comprises a liquid monoammonium phosphate production system which is respectively connected with a liquid fertilizer production system, an industrial monoammonium phosphate production system and a compound fertilizer production system, wherein the liquid monoammonium phosphate production system comprises a raw material lifting machine 1, the raw material lifting machine 1 is connected with an inlet of a first dissolving tank 3 through a metering scale 2, an outlet of the first dissolving tank 3 is connected with a filter press 5 through a first storage tank 4 and a second centrifugal pump 32, a filter residue outlet of the filter press 5 is connected with an inlet of a rotary drum device 6, and a filtrate outlet of the filter press 5 is connected with a first centrifugal pump 8 through a second storage tank 7; a water inlet pipeline 30 with a flowmeter 31 is arranged on the first dissolving tank 3; the first centrifugal pump 8 is connected with the liquid fertilizer production system through a tee joint; the third end of the tee joint is respectively connected with an industrial monoammonium phosphate production system and a compound fertilizer production system through an on-tower evaporator 11. The compound fertilizer production system comprises a common urea-based compound fertilizer production system and a nitro compound fertilizer production system. The common urea-based compound fertilizer production system comprises a front compound fertilizer production system 9, wherein the front compound fertilizer production system 9 sequentially passes through a tower upper tank 10, a second dissolving tank 12, a primary mixing tank I13, a secondary mixing tank I14 and a first emulsifying machine 15 to be connected with a first granulating nozzle 17 arranged in a first granulating tower 16, and the primary mixing tank I13 and the secondary mixing tank I14 are respectively connected with an upper evaporator 11. The nitrocompound fertilizer production system comprises a front nitrocompound fertilizer production system 18, wherein the front nitrocompound fertilizer production system 18 is sequentially connected with a melting tank 19, a primary mixing tank II 20, a secondary mixing tank II 21 and a second emulsifying machine 22, and a second granulating nozzle 24 arranged in a second granulating tower 23, and the melting tank 19 is connected with the evaporator 11 on the tower. The first centrifugal pump 8 is connected with a liquid fertilizer raw material stirring tank 25 in the liquid fertilizer production system. The on-tower evaporator 11 is connected to a powder spraying tower 26 in an industrial grade monoammonium phosphate production system. The first dissolving tank 3 is internally provided with a steam coil 27, the bottom of the steam coil 27 is connected with a steam pipeline 28, and the top of the steam coil 27 is provided with a condensate recovery pipeline 29.
The production process of the high-tower compound fertilizer production device comprises a production method of industrial monoammonium phosphate, and the production method comprises the following steps:
Step 1: enabling solid monoammonium phosphate to enter a first dissolution tank 3 after being metered by a raw material lifting machine 1 into a metering scale 2, enabling water in a water inlet pipeline 30 to enter the first dissolution tank 3 at the same time, and enabling steam to be introduced into a steam coil 27, so that the solid monoammonium phosphate is dissolved in the water in an accelerating way, and preparing slurry;
Step 2: the slurry enters a filter press 5 through a first storage tank 4 for filter pressing, and monoammonium phosphate slag after filter pressing enters a rotary drum device 6 to be used as a raw material for producing calcium magnesium phosphate fertilizer;
Step 3: the clear liquid after the filter pressing is sent into a powder spraying tower 26 through a second storage tank 7, a first centrifugal pump 8 and an on-tower evaporator 11 to prepare industrial monoammonium phosphate. The mass ratio of the water to the solid monoammonium phosphate in the step 1 is 1:1; the temperature of the materials in the first dissolving tank 3 is 75-90 ℃; and in the step 2, the filter pressing number of the filter press 5 is 400-800 meshes.
The above examples are only illustrative of the invention and are not intended to be limiting of the embodiments. Other variations or modifications of the above description will be apparent to persons of ordinary skill in the art. It is not necessary here to be exhaustive or to limit all embodiments to the precise form disclosed, and obviously many modifications and variations are possible within the scope of the invention as defined in the appended claims.
Experimental example 1
The high-tower urea-based compound fertilizer is produced by the original technology, and the effective content ratio of nitrogen, phosphorus and potassium of the compound fertilizer is as follows: 17-17-17; the raw materials, the contents and the proportions thereof are shown in the following table:
| Raw material name | Content (%) | Proportioning of | Description of the invention |
| Urea | 46 | 35％ | Nitrogen: 19.35% |
| Monoammonium phosphate (10-50-0) | 60 | 32.5％ | Phosphorus: 16.25% |
| Potassium sulfate | 52 | 27.5％ | Potassium: 16.16% |
| Potassium chloride | 62 | 3％ | |
| Stone powder | 1.5％ | ||
| Totalizing | 100％ | 51.76％ |
The high-tower urea-based compound fertilizer is produced by the process, and the effective content ratio of nitrogen, phosphorus and potassium of the compound fertilizer is as follows: 17-17-17; the raw materials, the contents and the proportions thereof are shown in the following table:
the comparison of the original process and the process of the invention can be used for reaching the following conclusion:
1. The raw process is used for producing the product, which is easy to cause thick slurry, has poor fluidity, large operation control difficulty and easy to cause a plurality of special-shaped grains and a plurality of broken grains, and some manufacturers replace stone powder with raw powder or add granulation auxiliary agents to improve the fluidity, but the process method can be used for adjusting the fluidity and solving the problem of thick slurry.
2. The proportion of urea in the original high tower process proportion is 35%, and the process method can reduce the proportion of urea by 5%, and the phosphorus content is improved by 1.25%.
3. The process method can effectively regulate and balance the fluidity of the fertilizer production slurry, and the external surface of the product is higher than the original process light roundness and the good grain rate.
4. The process method of the invention not only has effects on three seventeen products of the urea-thio, but also can adjust the adding method in different products in the high tower process of formulas of the nitro-thio, the nitro-chloro, the urea-thio, the urea-chloro and the like, thereby improving the fluidity and the appearance glossiness of the products.
Experimental example 2
The invention produces the high-tower urea-sulfur-based compound fertilizer in the actual production process, and the effective content ratio of nitrogen, phosphorus and potassium of the compound fertilizer is as follows: 17-17-17; the quality report is as follows:
As can be seen from the quality report, the urea-sulfur-based compound fertilizer produced by the process method has the following characteristics: 1. can reduce nitrogen content by more than 2%, and improve phosphorus and potassium by 1%; 2. the fluidity is good, and the digestion quantity of returned materials can be improved. 3. Appearance particles are smooth and round, and abnormal particles are reduced.
Experimental example 3
The invention produces the powdery all-water-soluble fertilizer, and the effective content ratio of nitrogen, phosphorus and potassium of the water-soluble fertilizer is as follows: 10-6-30 parts; the raw materials, the contents and the proportions thereof are shown in the following table:
from the table, the invention can be used for producing powdery water-soluble fertilizers with different formulas without being used for producing common urea-based compound fertilizers and nitro compound fertilizers.
Claims (5)
1. A high tower compound fertilizer apparatus for producing, its characterized in that: the production device comprises a liquid monoammonium phosphate production system which is respectively connected with a liquid fertilizer production system, an industrial monoammonium phosphate production system and a compound fertilizer production system, wherein the liquid monoammonium phosphate production system comprises a raw material lifting machine (1), the raw material lifting machine (1) is connected with an inlet of a first dissolving tank (3) through a metering scale (2), an outlet of the first dissolving tank (3) is connected with a filter press (5) through a first storage tank (4) and a second centrifugal pump (32), a filter residue outlet of the filter press (5) is connected with an inlet of a rotary drum device (6), and a filtrate outlet of the filter press (5) is connected with a first centrifugal pump (8) through a second storage tank (7); a water inlet pipeline (30) with a flowmeter (31) is arranged on the first dissolving tank (3);
The first centrifugal pump (8) is connected with the liquid fertilizer production system through a tee joint; the third end of the tee joint is respectively connected with an industrial monoammonium phosphate production system and a compound fertilizer production system through an on-tower evaporator (11);
the compound fertilizer production system comprises a common urea-based compound fertilizer production system and a nitro compound fertilizer production system;
the common urea-based compound fertilizer production system comprises a front compound fertilizer production system (9), wherein the front compound fertilizer production system (9) is sequentially connected with a first granulating nozzle (17) arranged in a first granulating tower (16) through a tower upper tank (10), a second dissolving tank (12), a first-stage mixing tank I (13), a second-stage mixing tank I (14) and a first emulsifying machine (15), and the first-stage mixing tank I (13) and the second-stage mixing tank I (14) are respectively connected with an evaporator (11) on the tower;
The nitrocompound fertilizer production system comprises a front nitrocompound fertilizer production system (18) and a front nitrocompound fertilizer production system (18), wherein the front nitrocompound fertilizer production system (18) is sequentially connected with a melting tank (19), a primary mixing tank II (20), a secondary mixing tank II (21) and a second emulsifying machine (22), and is connected with a second granulating nozzle (24) arranged in a second granulating tower (23), and the melting tank (19) is connected with an on-tower evaporator (11);
the first centrifugal pump (8) is connected with a liquid fertilizer raw material stirring tank (25) in the liquid fertilizer production system;
the on-tower evaporator (11) is connected with a powder spraying tower (26) in the industrial monoammonium phosphate production system.
2. The high tower compound fertilizer production device of claim 1, wherein: the inside of first dissolving tank (3) is equipped with steam coil (27), and steam coil's (27) bottom links to each other with steam pipe (28), and steam coil's (27) top is equipped with comdenstion water recovery pipeline (29).
3. A process for producing the high-tower compound fertilizer production device as claimed in claim 2, characterized in that: the production process comprises a production method of a common urea-based compound fertilizer, a production method of a nitro compound fertilizer, a production method of a liquid fertilizer and a production method of industrial monoammonium phosphate;
a. The production method of the common urea-based compound fertilizer comprises the following steps:
Step 1: enabling solid monoammonium phosphate to enter a metering scale (2) through a raw material lifting machine (1) and then enter a first dissolution tank (3), enabling water in a water inlet pipeline (30) to enter the first dissolution tank (3) at the same time, and enabling steam to be introduced into a steam coil (27) so as to enable the solid monoammonium phosphate to be dissolved in the water in an accelerating mode, and preparing slurry;
Step 2: the slurry enters a filter press (5) through a first storage tank (4) for filter pressing, and monoammonium phosphate slag after filter pressing enters a rotary drum device (6) to be used as a raw material for producing calcium magnesium phosphate fertilizer;
Step 3: the clear liquid after filter pressing is sent into a first-stage mixing tank I (13) and a second-stage mixing tank I (14) through a second storage tank (7), a first centrifugal pump (8) and an on-tower evaporator (11), urea solution or nitric acid solution in an on-tower tank (10) sequentially enters the first-stage mixing tank I (13) and the second-stage mixing tank I (14) through a second dissolving tank (12), and is mixed with clear liquid in the first-stage mixing tank I (13) and the second-stage mixing tank I (14) to form slurry, and the slurry enters a first granulating tower (16) through a first emulsifying machine (15) and a first granulating nozzle (17) to be granulated;
Step 4: adding potash fertilizer and auxiliary materials into the first-stage mixing tank I (13) of the step 3 for mixing, and adding medium and trace elements into the second-stage mixing tank I (14) for mixing;
b. The production method of the nitro compound fertilizer comprises the following steps:
Step 1: enabling solid monoammonium phosphate to enter a metering scale (2) through a raw material lifting machine (1) and then enter a first dissolution tank (3), enabling water in a water inlet pipeline (30) to enter the first dissolution tank (3) at the same time, and enabling steam to be introduced into a steam coil (27) so as to enable the solid monoammonium phosphate to be dissolved in the water in an accelerating mode, and preparing slurry;
Step 2: the slurry enters a filter press (5) through a first storage tank (4) for filter pressing, and monoammonium phosphate slag after filter pressing enters a rotary drum device (6) to be used as a raw material for producing calcium magnesium phosphate fertilizer;
Step 3: the clear liquid after filter pressing is sent into an evaporator (11) on the tower through a second storage tank (7) and a first centrifugal pump (8) to be evaporated and then is sent into a melting tank (19) to be mixed with the nitric phosphate fertilizer melt in a front nitrocompound fertilizer production system (18), and after mixing, the clear liquid enters a second granulation tower (23) to be granulated through a first-stage mixing tank II (20), a second-stage mixing tank II (21), a second emulsifying machine (22) and a second granulation spray head (24) in sequence;
Step 4: adding potassium sulfate, stone powder and auxiliary materials into the primary mixing tank II (20) in the step 3 for mixing; adding trace elements and a plant conditioner into the secondary mixing tank II (21) for mixing;
c. the production method of the liquid fertilizer comprises the following steps:
Step 1: enabling solid monoammonium phosphate to enter a metering scale (2) through a raw material lifting machine (1) and then enter a first dissolution tank (3), enabling water in a water inlet pipeline (30) to enter the first dissolution tank (3) at the same time, and enabling steam to be introduced into a steam coil (27) so as to enable the solid monoammonium phosphate to be dissolved in the water in an accelerating mode, and preparing slurry;
Step 2: the slurry enters a filter press (5) through a first storage tank (4) for filter pressing, and monoammonium phosphate slag after filter pressing enters a rotary drum device (6) to be used as a raw material for producing calcium magnesium phosphate fertilizer;
Step 3: sending the clear liquid after press filtration into a liquid fertilizer raw material stirring tank (25) through a second storage tank (7) and a first centrifugal pump (8), simultaneously adding other water-soluble raw materials into the liquid fertilizer raw material stirring tank (25), and stirring to prepare a liquid fertilizer, wherein the other water-soluble raw materials comprise water-soluble nitrogen, water-soluble potassium, water-soluble medium trace elements, humic acid and plant production agents;
d. the production method of the industrial grade monoammonium phosphate comprises the following steps:
Step 1: enabling solid monoammonium phosphate to enter a metering scale (2) through a raw material lifting machine (1) and then enter a first dissolution tank (3), enabling water in a water inlet pipeline (30) to enter the first dissolution tank (3) at the same time, and enabling steam to be introduced into a steam coil (27) so as to enable the solid monoammonium phosphate to be dissolved in the water in an accelerating mode, and preparing slurry;
Step 2: the slurry enters a filter press (5) through a first storage tank (4) for filter pressing, and monoammonium phosphate slag after filter pressing enters a rotary drum device (6) to be used as a raw material for producing calcium magnesium phosphate fertilizer;
Step 3: the clear liquid after the filter pressing is sent into a powder spraying tower (26) through a second storage tank (7), a first centrifugal pump (8) and an on-tower evaporator (11) to prepare industrial monoammonium phosphate.
4. A process for producing a high tower compound fertilizer production device according to claim 3, wherein: the mass ratio of the water to the solid monoammonium phosphate in the step 1 is 1:1; the temperature of the materials in the first dissolving tank (3) is 75-90 ℃; and in the step 2, the filter pressing number of the filter press (5) is 400-800 meshes.
5. A process for producing a high tower compound fertilizer production device according to claim 3, wherein: in the step 3 of the production method of the common urea-based compound fertilizer, the concentration of the clear solution entering the first-stage mixing tank I (13) and the second-stage mixing tank I (14) is 70-98 percent; the clear liquid concentration of the melting tank (19) in the step 3 of the production method of the nitro compound fertilizer is 70-98%.
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