CN113800971A - Production method of high-tower high-activity humic acid compound fertilizer - Google Patents
Production method of high-tower high-activity humic acid compound fertilizer Download PDFInfo
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- CN113800971A CN113800971A CN202111096873.3A CN202111096873A CN113800971A CN 113800971 A CN113800971 A CN 113800971A CN 202111096873 A CN202111096873 A CN 202111096873A CN 113800971 A CN113800971 A CN 113800971A
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- 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
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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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- 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
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- 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
- C05G5/10—Solid or semi-solid fertilisers, e.g. powders
- C05G5/12—Granules or flakes
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Abstract
The invention provides a production method of a high-tower high-activity humic acid compound fertilizer, and relates to the technical field of compound fertilizer production processes. The method comprises the steps of urea melting, raw material treatment, slurry preparation, high tower granulation and product treatment; the quantity of broken particles in the production process is reduced, the probability of generating overflow grooves in the reaction groove is greatly reduced, the continuity of production of the high-tower humic acid compound fertilizer is improved, and the product is rich in high-activity activated humic acid, thereby being beneficial to improving the soil and improving the utilization rate of the fertilizer; the product quality is excellent, the production system is stable, the safety of operators is improved, and the product series of high-tower compound fertilizers is expanded.
Description
Technical Field
The invention provides a production method of a high-tower high-activity humic acid compound fertilizer, and relates to the technical field of compound fertilizer production processes.
Background
The high tower compound fertilizer integrates granulation, drying and cooling in the traditional roller compound fertilizer process into a granulation high tower by utilizing the characteristics that molten urea, monoammonium phosphate and potassium chloride (or potassium sulfate) can form a eutectic point and have certain fluidity, does not use fuel in the production process, adopts steam as a heat source, utilizes the high tower as cooling equipment and adopts natural ventilation in the tower for cooling;
the traditional compound fertilizer has single function, soil hardening can be caused after long-term use, nutrients such as nitrogen, phosphorus and potassium contained in the fertilizer are easy to lose, the utilization rate of the fertilizer is not high, groundwater and lakes can be polluted seriously, the humic acid fertilizer is an environment-friendly fertilizer containing humic acid substances, a large amount of research and popularization and application work of the humic acid-containing fertilizer is carried out in recent years in various places of China, but at present, the humic acid fertilizer is mostly in the form of roller compound fertilizer, water-soluble fertilizer, liquid fertilizer and the like on the market, high-tower humic acid compound fertilizer is rare on the market, although the humic acid-containing compound fertilizer is marked on the package of a plurality of enterprises, the specific content index is fuzzily marked, even the high-tower compound fertilizer is prepared by sequentially coloring with sufficient dye, simply spraying the surface with different colors inside and outside, the reasons of the high-tower compound fertilizer are researched, and the high-temperature molten urea and potassium chloride are utilized, Monoammonium phosphate and other materials form slurry with better fluidity, and then granulation is carried out through a special nozzle, however, humic acid has certain chemical reaction characteristics and is easy to have violent chemical reaction with high-temperature molten slurry in the production process of a high tower, so that the produced product has more broken particles, and the production cannot be carried out due to the fact that a reaction tank breaks down in severe cases.
Disclosure of Invention
In order to solve the problems, the invention provides a production method of a high-tower high-activity humic acid compound fertilizer, which reduces the number of broken particles in the production process, greatly reduces the probability of generating grooves in a reaction tank, and improves the continuity of the production of the high-tower humic acid compound fertilizer.
The invention provides a production method of a high-tower high-activity humic acid compound fertilizer, which comprises urea melting, raw material treatment, slurry preparation, high-tower granulation and product treatment;
urea melting is to convey urea to a screw conveyer through an electronic belt scale and then enter a urea melting tank through a lifter, the urea is subjected to indirect heat exchange by steam in the melting tank, and the temperature is controlled to be 135-; solid urea is melted into liquid urea liquid, and the urea liquid which is completely melted enters a primary mixing tank through an overflow port arranged at the upper part of a tank body along with the continuous entering and melting of solid granular urea;
the raw material treatment comprises the treatment of potassium chloride, potassium sulfate, a filling material, monoammonium phosphate, humic acid and a return material, wherein the potassium chloride, the potassium sulfate, the filling material and the monoammonium phosphate are measured by an electronic belt scale, treated by using screening equipment and then conveyed into a primary mixing tank at the upper part of a high tower through a screw conveyor and a lifter, a coil pipe which is indirectly heated inside and outside is arranged in the primary mixing tank, the temperature is controlled to be 110-plus-120 ℃, the urea liquid which overflows from a urea melting tank is uniformly mixed under the action of a stirring fin, and slurry with good fluidity enters a secondary mixing tank through an overflow port which is arranged at the middle upper part of the primary mixing tank along with the continuous entering of the urea liquid and solid materials;
the return material is a material with the particle size of less than or equal to 2.00mm and more than or equal to 4.5mm which is separated out by a screening section of the production system, the material is returned to a feeding position through conveying equipment and enters a return material buffer bin, the activated humic acid is pretreated to meet the production requirement of a high tower and is directly fed into the raw material buffer bin, and the monoammonium phosphate is cached by a bin; and using screening equipment to process, conveying the mixture into a secondary mixing tank at the upper part of a high tower through a screw conveyor and a lifter, wherein a coil pipe which is indirectly heated inside and outside is also arranged in the secondary mixing tank, controlling the temperature to be 100-plus-110 ℃, uniformly mixing the mixture with the slurry overflowing from the primary mixing tank under the action of a stirring fin, and feeding the mixed slurry with good fluidity into a differential double-shaft granulator through an overflow port arranged at the upper part of the secondary mixing tank to granulate along with the continuous feeding of the slurry and solid materials in the primary mixing tank
The product treatment comprises that slurry forms spherical liquid drops under the shearing action of an inner material distributor and an outer spraying cup of a differential granulator, then the spherical liquid drops freely fall from a high position, and are gradually solidified by continuously exchanging heat with air of a tower body in the falling process, and finally fall on a fixed disc material receiving device at the bottom of a high tower, the materials are firstly cooled once by a boiling fluidized bed, and are separated by screening equipment after cooling, the particle size of 2-4.5mm is selected as a product, the rest materials are returned to a feeding position, the product with the qualified particle size is secondarily cooled by a powder flow cooler, the particle materials are continuously exchanged heat with cooling water in a sandwich layer in a powder flow, the finished product after secondary cooling enters a coating machine to be sprayed with anti-caking materials, and finally the finished product is filled.
The viscosity reducer comprises a carrier raw material and a surfactant, wherein the carrier raw material is magnesium sulfate heptahydrate, the surfactant comprises a nonionic surfactant, an anionic surfactant and a cationic surfactant, the nonionic surfactant is a polyoxyethylene propylene glycol ether-ether emulsified copolymer (liquid), the anionic surfactant is fatty acid methyl ester ethoxylate sulfonate (liquid), and the cationic surfactant is polyquaternium-11 (liquid).
The potassium chloride and the potassium sulfate need to be firstly processed by a large-block crusher at a feed port, then caching by a storage bin, and the monoammonium phosphate needs to be firstly processed by the large-block crusher at the feed port, then caching by the storage bin; and the materials with the particle size larger than 1mm are treated by a crusher and then sieved again, and the materials with the particle size smaller than 1mm are conveyed by a screw conveyer and a lifter.
The humic acid activating process comprises the steps of accurately metering humic acid and an activating agent by a belt scale, then feeding the humic acid and the activating agent into a double-shaft stirrer for premixing and reacting, drying by a roller countercurrent dryer, and finally metering and packaging in a cold area by a roller countercurrent cooler.
The humic acid raw ore comprises any one of peat, weathered coal and lignite, wherein the content of total humic acid in the raw ore is more than 60%, and the content of free humic acid is more than 70%; pretreating a massive material of raw humic acid ore by using a Raymond mill, wherein the fineness of the humic acid is required to reach 80-100 meshes, the water content of the humic acid is controlled to be below 25 percent, and an activating agent adopts potassium hydroxide or sodium hydroxide; the use ratio of humic acid to activating agent is usually controlled to be 10: (1-1.5); humic acid and activating agent are accurately metered by a belt scale and then enter a double-shaft stirrer for premixing and reacting, and the moisture content of the mixed material is 25%.
The drum countercurrent dryer is a rotary cylinder, the diameter and the length of the drum need to be designed according to the expected yield, the matched equipment comprises a cloth bag dust removal air inducing system and a steam heat exchange system, a humic acid mixture inlet, a dry air outlet, a humic acid mixture outlet and a dry air inlet are respectively arranged at the two ends of the drum, a lifting blade in the drum is in a straight plate form, and the top of the straight plate is designed into a wave-shaped structure.
The drum countercurrent cooling machine is a rotary drum, the diameter and the length of the drum need to be designed according to the expected yield, the matched equipment is a cloth bag dust removal air inducing system, and a humic acid mixture inlet, a cooling air outlet, a humic acid mixture outlet and a cooling air inlet are respectively arranged at two ends of the drum.
The defoaming agent gets into the one-level mixing tank after passing through the diaphragm type measurement, can the misce bene in the one-level reaction tank to get into that the second grade reaction tank can be in time abundant contact with rotten acid, and the defoaming agent reserves in the second grade mixing tank and adds the mouth, can additionally add during the abnormal conditions, the measuring pump of defoaming agent needs carries out interlocking control with the rate of addition of other raw materials, in order to ensure the degree of accuracy of interpolation and the stability of defoaming.
The humic acid and the system return material containing the humic acid are added in the secondary reaction tank, so that the contact time of the humic acid and the high-temperature slurry can be effectively reduced, and the reaction degree is reduced.
The invention has the beneficial effects that:
the invention provides a production method of a high-tower high-activity humic acid compound fertilizer, which reduces the number of broken particles in the production process, greatly reduces the probability of the reaction tank generating the overflow tank, improves the continuity of the production of the high-tower humic acid compound fertilizer, and the product is rich in high-activity activated humic acid, thereby being beneficial to improving the soil and improving the utilization rate of the fertilizer; the product quality is excellent, the production system is stable, the safety of operators is improved, and the product series of high-tower compound fertilizers is expanded.
Drawings
FIG. 1 is a flow chart of a production process of a high-tower humic acid compound fertilizer by the method for preparing the viscosity reducer of the high-tower carbamido compound fertilizer.
FIG. 2 is a material composition diagram of the manufacturing method of the high-tower urea-based compound fertilizer viscosity reducer of the invention.
FIG. 3 is an activation flow chart of the preparation method of the viscosity reducer for the high-tower ureido compound fertilizer.
Detailed Description
Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
As shown in figures 1-3, the invention provides a method for preparing a viscosity reducer for a high-tower urea-based compound fertilizer, which comprises the steps of designing urea with the particle size of 0.85-2.8mm according to a product formula, metering the urea by using a dynamic electronic belt scale, conveying the urea into a urea melting tank at the upper part of a high tower by using equipment such as a screw conveyor, a lifter and the like, indirectly exchanging heat of the urea in the melting tank by steam, controlling the temperature to be 135-145 ℃, melting the solid urea into liquid urea liquid, and allowing the urea liquid completely melted to enter a primary mixing tank through an overflow port arranged at the upper part of a tank body along with the continuous entering and melting of the solid particle urea; the filling material is directly thrown into a raw material buffer bin without being treated because no caking phenomenon occurs, potassium chloride or potassium sulfate needs to be firstly treated by a large crusher at a feeding port, then the filling material is cached by a storage bin, the materials are measured by a dynamic electronic belt scale after being calculated according to the formula design, the measured materials need to be treated by screening equipment, the materials with the particle size larger than 1mm can be treated by the crusher and then screened again, the materials with the particle size smaller than 1mm are conveyed into a primary mixing tank at the upper part of a high tower by a spiral conveyor, a lifter and other equipment, a coil pipe which is indirectly heated inside and outside is also arranged in the primary mixing tank, the urea liquid overflowing from a urea melting tank is uniformly mixed under the action of a stirring fin under the condition of controlling the temperature of 110- A mixing tank;
the activated humic acid is pretreated to meet the production requirement of a high tower and is directly put into a raw material buffer bin; the returned material is the material with the grain diameter less than or equal to 2.00mm and more than or equal to 4.5mm which is separated out by the screening section of the production system, and the returned material returns to the feeding position through the conveying equipment and enters the returned material buffer bin; the phosphorus raw material is firstly processed by a large crusher at a feed inlet, and then cached by a storage bin; the materials are measured by adopting a dynamic electronic belt scale after being calculated according to the formula design, the measured materials need to be treated by using screening equipment, the materials with the particle size larger than 1mm are treated by using a crusher and then screened again, the materials with the particle size smaller than 1mm are conveyed into a secondary mixing tank at the upper part of a high tower by using equipment such as a screw conveyor, a lifter and the like, a coil pipe which is indirectly heated inside and outside is also arranged in the secondary mixing tank, the temperature is controlled at 100-plus-110 ℃, the materials and slurry overflowing from a primary mixing tank are uniformly mixed under the action of stirring fins, the slurry and solid materials enter along with the slurry and solid materials in the primary mixing tank, and the slurry with good fluidity after mixing enters a differential double-shaft granulator through an overflow port arranged at the middle upper part of the secondary mixing tank for granulation;
the differential granulator is arranged at the upper part of the high tower and is about 80-90 m away from the bottom, the slurry forms spherical liquid drops under the shearing action of an inner distributor and an outer spraying cup of the differential granulator, and then falls freely from the high position in a parabola shape, the material is cooled and gradually solidified by continuously exchanging heat with the air of the tower body in the falling process, finally falls on a fixed disc material receiving device at the bottom of the high tower, the material is firstly cooled once by using a boiling fluidized bed, is separated by using screening equipment after being cooled, selects the particle size of 2-4.5mm as a product, returning the rest materials to the feeding position, performing secondary cooling on the product with the qualified particle size by using a powder flow cooler, continuously cooling the particle materials in the powder flow by indirect heat exchange with cooling water in the interlayer, spraying the finished product subjected to secondary cooling into a coating machine, spraying an anti-caking material, and finally filling the finished product;
the adopted humic acid raw ore can be peat, weathered coal or lignite, the content of the total humic acid in the raw ore is more than 60 percent, and the content of free humic acid in the raw ore is more than 70 percent; pretreating a massive material of raw humic acid ore by using a Raymond mill, wherein the fineness of the humic acid is required to reach about 80-100 meshes, and the water content of the humic acid is controlled to be below 25%; the activator adopts potassium hydroxide or sodium hydroxide, is commonly in powder and flake shapes according to the characters, preferentially uses the powder, can increase the contact area during the reaction and accelerate the activation reaction; the use ratio of humic acid to activating agent is usually controlled to be 10: (1-1.5) about, insufficient addition amount of the activating agent can cause insufficient humic acid activation, excessive addition amount of the activating agent can cause waste, and the alkalinity of the product is too strong to limit the application range of the product; humic acid and an activating agent are accurately metered by a belt scale and then enter a double-shaft stirrer for premixing and reaction, the moisture content of the humic acid needs to be concerned, the moisture content of the mixed material is controlled to be about 25%, and when the moisture content is insufficient, the moisture content is controlled by adding moisture from the outside;
the drum countercurrent dryer is a rotary cylinder, the diameter and the length of the drum need to be designed according to the expected yield, the matched equipment comprises a cloth bag dust removal air induction system and a steam heat exchange system, a humic acid mixture inlet and a drying air outlet are designed at the front part of the drum, a humic acid mixture outlet and a drying air inlet are designed at the tail part of the drum, an internal lifting plate is in a straight plate form, the top of the straight plate is designed into a wave-shaped structure, the control of the lifting quantity and the lifting height of the lifting plate on materials needs to be paid attention to, the lifting plate can lift too much materials to cause humic acid powder to be taken away by the air induction system, and the lifting material can be too little to cause humic acid to be dried; the drum countercurrent cooler is a rotary cylinder, the diameter and the length of the drum need to be designed according to the expected yield, the matched equipment is a cloth bag dust removal air inducing system, a humic acid mixture inlet and a cooling air outlet are designed at the front part of the drum, a humic acid mixture outlet and a cooling air inlet are designed at the tail part of the drum, and the shoveling plate form is the same as that of the drum countercurrent dryer;
the defoaming agent enters a first-stage mixing tank after being metered by a diaphragm type, and can be uniformly mixed in a first-stage reaction tank as much as possible so as to enter a second-stage reaction tank and be in contact with humic acid sufficiently in time; the phytic acid and the return materials of the system containing the humic acid are added in the secondary reaction tank, so that the contact time of the humic acid and the high-temperature slurry can be effectively reduced, and the reaction degree is reduced.
The present invention and its embodiments have been described above, and the description is not intended to be limiting, and the drawings are only one embodiment of the present invention, and the actual structure is not limited thereto. In summary, those skilled in the art should appreciate that they can readily use the disclosed conception and specific embodiments as a basis for designing or modifying other structures for carrying out the same purposes of the present invention without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (8)
1. A production method of a high-tower high-activity humic acid compound fertilizer is characterized by comprising the following steps: the method comprises the steps of urea melting, raw material treatment, slurry preparation, high tower granulation and product treatment;
urea melting is to convey urea to a screw conveyer through an electronic belt scale and then enter a urea melting tank through a lifter, the urea is subjected to indirect heat exchange by steam in the melting tank, and the temperature is controlled to be 135-; solid urea is melted into liquid urea liquid, and the urea liquid which is completely melted enters a primary mixing tank through an overflow port arranged at the upper part of a tank body along with the continuous entering and melting of solid granular urea;
the raw material treatment comprises the treatment of potassium chloride, potassium sulfate, a filling material, monoammonium phosphate, humic acid and a return material, wherein the potassium chloride, the potassium sulfate, the filling material and the monoammonium phosphate are measured by an electronic belt scale, treated by using screening equipment and then conveyed into a primary mixing tank at the upper part of a high tower through a screw conveyor and a lifter, a coil pipe which is indirectly heated inside and outside is arranged in the primary mixing tank, the temperature is controlled to be 110-plus-120 ℃, the urea liquid which overflows from a urea melting tank is uniformly mixed under the action of a stirring fin, and slurry with good fluidity enters a secondary mixing tank through an overflow port which is arranged at the middle upper part of the primary mixing tank along with the continuous entering of the urea liquid and solid materials;
the return material is a material with the particle size of less than or equal to 2.00mm and more than or equal to 4.5mm which is separated out by a screening section of the production system, the material is returned to a feeding position through conveying equipment and enters a return material buffer bin, the activated humic acid is pretreated to meet the production requirement of a high tower and is directly fed into the raw material buffer bin, and the monoammonium phosphate is cached by a bin; and using screening equipment to process, conveying the mixture into a secondary mixing tank at the upper part of a high tower through a screw conveyor and a lifter, wherein a coil pipe which is indirectly heated inside and outside is also arranged in the secondary mixing tank, controlling the temperature to be 100-plus-110 ℃, uniformly mixing the mixture with the slurry overflowing from the primary mixing tank under the action of a stirring fin, and feeding the mixed slurry with good fluidity into a differential double-shaft granulator through an overflow port arranged at the upper part of the secondary mixing tank to granulate along with the continuous feeding of the slurry and solid materials in the primary mixing tank
The product treatment comprises that slurry forms spherical liquid drops under the shearing action of an inner material distributor and an outer spraying cup of a differential granulator, then the spherical liquid drops freely fall from a high position, and are gradually solidified by continuously exchanging heat with air of a tower body in the falling process, and finally fall on a fixed disc material receiving device at the bottom of a high tower, the materials are firstly cooled once by a boiling fluidized bed, and are separated by screening equipment after cooling, the particle size of 2-4.5mm is selected as a product, the rest materials are returned to a feeding position, the product with the qualified particle size is secondarily cooled by a powder flow cooler, the particle materials are continuously exchanged heat with cooling water in a sandwich layer in a powder flow, the finished product after secondary cooling enters a coating machine to be sprayed with anti-caking materials, and finally the finished product is filled.
2. The production method of high-tower high-activity humic acid compound fertilizer as claimed in claim 1, which is characterized in that: the potassium chloride and the potassium sulfate need to be firstly processed by a large-block crusher at a feed port, then caching by a storage bin, and the monoammonium phosphate needs to be firstly processed by the large-block crusher at the feed port, then caching by the storage bin; and the materials with the particle size larger than 1mm are treated by a crusher and then sieved again, and the materials with the particle size smaller than 1mm are conveyed by a screw conveyer and a lifter.
3. The production method of high-tower high-activity humic acid compound fertilizer as claimed in claim 1, which is characterized in that: the humic acid activating process comprises the steps of accurately metering humic acid and an activating agent by a belt scale, then feeding the humic acid and the activating agent into a double-shaft stirrer for premixing and reacting, drying by a roller countercurrent dryer, and finally metering and packaging in a cold area by a roller countercurrent cooler.
4. The production method of high-tower high-activity humic acid compound fertilizer as claimed in claim 3, characterized in that: the humic acid raw ore comprises any one of peat, weathered coal and lignite, wherein the content of total humic acid in the raw ore is more than 60%, and the content of free humic acid is more than 70%; pretreating a massive material of raw humic acid ore by using a Raymond mill, wherein the fineness of the humic acid is required to reach 80-100 meshes, the water content of the humic acid is controlled to be below 25 percent, and an activating agent adopts potassium hydroxide or sodium hydroxide; the use ratio of humic acid to activating agent is usually controlled to be 10: (1-1.5); humic acid and activating agent are accurately metered by a belt scale and then enter a double-shaft stirrer for premixing and reacting, and the moisture content of the mixed material is 25%.
5. The production method of high-tower high-activity humic acid compound fertilizer as claimed in claim 3, characterized in that: the drum countercurrent dryer is a rotary cylinder, the diameter and the length of the drum need to be designed according to the expected yield, the matched equipment comprises a cloth bag dust removal air inducing system and a steam heat exchange system, a humic acid mixture inlet, a dry air outlet, a humic acid mixture outlet and a dry air inlet are respectively arranged at the two ends of the drum, a lifting blade in the drum is in a straight plate form, and the top of the straight plate is designed into a wave-shaped structure.
6. The production method of high-tower high-activity humic acid compound fertilizer as claimed in claim 3, characterized in that: the drum countercurrent cooling machine is a rotary drum, the diameter and the length of the drum need to be designed according to the expected yield, the matched equipment is a cloth bag dust removal air inducing system, and a humic acid mixture inlet, a cooling air outlet, a humic acid mixture outlet and a cooling air inlet are respectively arranged at two ends of the drum.
7. The production method of high-tower high-activity humic acid compound fertilizer as claimed in claim 1, which is characterized in that: the defoaming agent gets into the one-level mixing tank after passing through the diaphragm type measurement, can the misce bene in the one-level reaction tank to get into that the second grade reaction tank can be in time abundant contact with rotten acid, and the defoaming agent reserves in the second grade mixing tank and adds the mouth, can additionally add during the abnormal conditions, the measuring pump of defoaming agent needs carries out interlocking control with the rate of addition of other raw materials, in order to ensure the degree of accuracy of interpolation and the stability of defoaming.
8. The production method of high-tower high-activity humic acid compound fertilizer as claimed in claim 1, which is characterized in that: the humic acid and the system return material containing the humic acid are added in the secondary reaction tank, so that the contact time of the humic acid and the high-temperature slurry can be effectively reduced, and the reaction degree is reduced.
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Cited By (1)
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| CN113929541A (en) * | 2020-06-29 | 2022-01-14 | 红河锦东化工股份有限公司 | Continuous production process of humic acid water-soluble fertilizer by one-step method |
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| CN113929541A (en) * | 2020-06-29 | 2022-01-14 | 红河锦东化工股份有限公司 | Continuous production process of humic acid water-soluble fertilizer by one-step method |
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