CN113372571A - Production process of potassium fulvate dry powder - Google Patents
Production process of potassium fulvate dry powder Download PDFInfo
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- CN113372571A CN113372571A CN202110758848.0A CN202110758848A CN113372571A CN 113372571 A CN113372571 A CN 113372571A CN 202110758848 A CN202110758848 A CN 202110758848A CN 113372571 A CN113372571 A CN 113372571A
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- dry powder
- potassium fulvate
- alcohol
- honey
- concentrated solution
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08H—DERIVATIVES OF NATURAL MACROMOLECULAR COMPOUNDS
- C08H6/00—Macromolecular compounds derived from lignin, e.g. tannins, humic acids
-
- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05F—ORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C, e.g. FERTILISERS FROM WASTE OR REFUSE
- C05F11/00—Other organic fertilisers
- C05F11/02—Other organic fertilisers from peat, brown coal, and similar vegetable deposits
-
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Pest Control & Pesticides (AREA)
- Biochemistry (AREA)
- Engineering & Computer Science (AREA)
- Soil Sciences (AREA)
- Materials Engineering (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention discloses a production process of potassium fulvate dry powder, which comprises the steps of selecting raw materials and processing and manufacturing potassium fulvate, filtering molasses alcohol waste mash → concentrating → neutralizing → heat exchanging → hot air drying → separating → cooling → separating → packaging; s1, selecting the waste mash of the honey and alcohol, introducing the waste mash of the honey and alcohol into a sedimentation basin, and extracting clear liquid of the waste mash of the honey and alcohol through sedimentation at a certain temperature. The invention has the advantages that compared with the widely used coal-fired hot blast stove at present, the adopted bagasse hot blast stove better conforms to the guide of national energy and environmental protection policies; the unique hearth design and the auxiliary multi-pipe dust removing equipment ensure that the hot air particles are less than or equal to 120mg/Nm3Provides necessary support for realizing full water solubility of the product and improves the product qualityThe novel centrifugal spraying tower with high yield, low energy consumption and stable continuous operation in the industry is realized by adopting the unique hot air distributor and the atomizer with high speed limit, so that the energy is saved, the environment is protected, and the production cost is reduced.
Description
Technical Field
The invention relates to the technical field of potassium fulvate dry powder production, in particular to a production process of potassium fulvate dry powder.
Background
The potassium fulvate powder is a multifunctional excellent potassium fertilizer and is prepared by extracting fulvic acid. The sources of the fulvic acid mainly comprise two types, one type is extracted after biological fermentation of crops such as straws and the like, and the extracted fulvic acid is called biochemical fulvic acid; one is extracted from minerals rich in fulvic acid, and is called mineral fulvic acid. The biochemical fulvic acid has high biological activity, but is easy to decarboxylate and lose activity in the concentration process, and meanwhile, the finished product is easy to absorb water and deliquesce in the air and is inconvenient to use, so the biochemical fulvic acid is only suitable for liquid forms and is inconvenient to transport and use. The mineral fulvic acid has the advantages of complete chemical structure, more cavities, high activity, large exchange capacity and high purity. The finished product is not deliquescent in air and is convenient to use.
In the prior art, large particles are easy to enter the potassium fulvate powder through hot air in the heat-sealing drying process of the potassium fulvate dry powder, so that the water solubility of the potassium fulvate is poor, the utilization rate of raw materials in the prior art is low, the raw materials cannot be effectively utilized, the raw materials are wasted more, and the production cost is increased.
Therefore, we propose a production process of potassium fulvate dry powder to solve the above problems.
Disclosure of Invention
The invention aims to solve the problems of poor water solubility, low remote utilization rate and the like of potassium fulvate in the prior art, and provides a production process of potassium fulvate dry powder.
In order to achieve the purpose, the invention adopts the following technical scheme:
the production process of the potassium fulvate dry powder comprises the steps of selecting raw materials and processing and manufacturing the potassium fulvate, filtering molasses alcohol waste mash → concentrating → neutralizing → heat exchange → hot air drying → separating → cooling → separating → packaging;
s1, selecting the waste mash of the honey-sugar alcohol, introducing the waste mash of the honey-sugar alcohol into a sedimentation basin, and extracting clear liquid of the waste mash of the honey-sugar alcohol through sedimentation at a certain temperature;
s2, gathering sediments of the waste mash of the honey-alcohol after extracting the clear liquid, then introducing the sediments into a filtering tank, squeezing and filtering to extract filtrate, and filtering to obtain sediments to form a filter cake so as to reduce the occupied space of solid residues for subsequent treatment;
s3, introducing the clear liquid and the filtrate into a concentration liquid storage tank for concentration to form a concentrated solution, so that the concentration of the materials is improved, the high-concentration materials are stored in the liquid storage tank, the cleanness degree of the materials is kept, and residual impurities in the materials are avoided;
s4, taking out lime, making the lime into lime milk by using a lime slaker, mixing the lime milk with the concentrated solution, and then stirring uniformly to allow the lime milk to react with the concentrated solution sufficiently so as to neutralize the concentrated solution;
s5, introducing the neutralized material into a drying tower for plate heat exchange, wherein the material needs to be preheated before being introduced into the drying tower, and the material is prevented from being adhered to the inside of the drying tower;
s6, after plate-type heat exchange of the material is completed, the material is introduced into a centrifugal spray drying tower for centrifugal spray drying, impurities are prevented from being contained in introduced hot air in the spray drying process, and the viscous material is prevented from blocking an atomizing nozzle;
s7, carrying out cyclone separation on the material after centrifugal spray drying, and washing tail gas generated by the cyclone separation by a washing tower;
s8, cooling the cyclone-separated dry material powder by introducing air, and avoiding the dry powder from being damped again;
and S9, performing cyclone separation on the dry powder again, and performing powder packaging on the separated dry powder.
Preferably, in step S1, the settling time of the waste mash of the molasses alcohol is more than or equal to 10 hours, the settling temperature is 80-90 ℃, and the settling section and the flow rate are.
Preferably, in step S3, the concentrated solution storage tank is used for storing the concentrated solution and performing solid-liquid separation on the concentrated solution to ensure the cleanness of the subsequent processes.
Preferably, in step S4, the pH value of the neutralization is 6.2-6.4, the neutralization time is more than or equal to 2 hours, and the neutralization concentration is more than or equal to 60 brix.
Preferably, in step S5, the temperature of the material entering the drying tower is greater than or equal to 85 ℃, hot water circulation heat exchange is performed on the material by using hot water generated by the bagasse hot water boiler, and the flow rate of a heat exchange surface is greater than or equal to one.
Preferably, in step S6, the air inlet temperature of the centrifugal spray drying tower is 260-320 ℃ +/-5 ℃, the exhaust temperature is 90-100 ℃, and the ultralow micro negative pressure in the tower is less than or equal to 100Pa, the bagasse hot blast stove is adopted to carry out centrifugal spray drying on the material, so that hot blast particles are less than or equal to 120mg/Nm3The temperature of the hearth is 800-1000 ℃, the temperature of hot air is 260-320 +/-5 ℃, and the tower is internally provided with a hot air distributor and a high-speed-limiting atomizer.
Preferably, in step S8, the introduced air needs to be dehumidified.
Preferably, in step S9, the separated residue is subjected to a subsequent step such as continuous separation in the first cyclone separation.
Compared with the prior art, the invention has the beneficial effects that:
1. before spray centrifugal drying, the difficulty of heat exchange and scaling can be solved by utilizing hot water circulation heat exchange and enabling the flow velocity of a heat exchange surface to be equal to or more than one; the material temperature is more than or equal to 85 ℃, measures such as high-speed homogenization and the like are adopted, and the bad phenomena of tower adhesion and the like caused by poor atomization effect during centrifugal spray drying of high-concentration and high-viscosity materials are effectively solved;
2. compared with the widely used coal-fired hot blast stove at present, the adopted bagasse hot blast stove is more in line with the guidance of national energy and environmental protection policies; the unique hearth design and the auxiliary multi-pipe dust removing equipment ensure that the hot air particles are less than or equal to 120mg/Nm3The novel centrifugal spray tower has the advantages that necessary support is provided for realizing full water solubility of products, a unique hot air distributor and a high-speed-limiting atomizer are adopted, the novel centrifugal spray tower which is high in yield, low in energy consumption and stable in continuous operation in the industry is realized, energy is saved, the environment is protected, the product yield is improved, and the production cost is reduced;
3. through filtering the sediment and extracting, can furthest utilize the raw materials, avoid the waste of raw and other materials, reduction in production cost through carrying out cyclone once more with the residue after separating, can effectually draw remaining material powder in the residue, further avoided the waste of material, improve the output of product, practice thrift economic cost.
Detailed Description
The technical solutions in the embodiments of the present invention are clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments.
The production process of the potassium fulvate dry powder comprises the steps of selecting raw materials and processing and manufacturing the potassium fulvate, filtering molasses alcohol waste mash → concentrating → neutralizing → heat exchange → hot air drying → separating → cooling → separating → packaging;
s1, selecting the waste mash of the honey and alcohol, introducing the waste mash of the honey and alcohol into a settling pond, and extracting clear liquid of the waste mash of the honey and alcohol through settling at a certain temperature, wherein in the step, the settling time of the waste mash of the honey and alcohol is more than or equal to 10 hours, the settling temperature is 80-90 ℃, and the settling section and the flow rate are set to ensure the cleanness of the clear liquid, so that the processing of the subsequent process is facilitated, the water solubility of the product is improved, and the production quality of the product is improved;
s2, gathering sediments of the waste mash of the honey and alcohol after extracting the clear liquid, then introducing the sediments into a filtering tank, squeezing and filtering to extract filtrate, wherein the sediments obtained after filtering form a filter cake, so that the occupied space of solid residues is reduced for subsequent treatment, and the sediments are filtered and extracted, so that the raw materials can be utilized to a greater extent, the waste of the raw materials is avoided, and the production cost is reduced;
s3, introducing the clear liquid and the filtrate into a concentration liquid storage tank for concentration to form a concentrated solution, so that the concentration of the material is improved, the high-concentration material is stored in the liquid storage tank, the cleanness degree of the material is kept, and residual impurities in the material are avoided;
s4, taking out lime, making the lime into lime milk by using a lime slaker, mixing the lime milk with the concentrated solution, uniformly stirring, and fully reacting the lime milk with the concentrated solution to neutralize the concentrated solution, wherein in the step, the pH value of neutralization is 6.2-6.4, the neutralization time is more than or equal to 2 hours, and the neutralization concentration is more than or equal to 60 brix;
s5, introducing the neutralized material into a drying tower for plate heat exchange, wherein the material needs to be preheated before being introduced into the drying tower, and the adhesion of the material to the inside of the drying tower is avoided; the material temperature is more than or equal to 85 ℃, measures such as high-speed homogenization and the like are adopted, and the bad phenomena of tower adhesion and the like caused by poor atomization effect during centrifugal spray drying of high-concentration and high-viscosity materials are effectively solved;
s6, after plate-type heat exchange of the material is completed, the material is introduced into a centrifugal spray drying tower for centrifugal spray drying, impurities are prevented from being contained in introduced hot air in the spray drying process, viscous material is prevented from blocking an atomizing nozzle, in the step, the air inlet temperature of the centrifugal spray drying tower is 260-320 +/-5 ℃, the exhaust temperature is 90-100 ℃, and extremely low micro negative pressure in the tower is kept to be less than or equal to 100Pa, a bagasse hot blast stove is adopted for centrifugal spray drying of the material, so that hot air particles are less than or equal to 120mg/Nm3The temperature of a hearth is 800-1000 ℃, the temperature of hot air is 260-320 +/-5 ℃, the tower is internally provided with a hot air distributor and a high-speed-limiting atomizer, and compared with the existing widely-used coal-fired hot air furnace, the adopted bagasse hot air furnace is more in line with the guidance of national energy and environmental protection policies; the unique hearth design and the auxiliary multi-pipe dust removing equipment ensure that the hot air particles are less than or equal to 120mg/Nm3The novel centrifugal spray tower has the advantages that necessary support is provided for realizing full water solubility of products, a unique hot air distributor and a high-speed-limiting atomizer are adopted, the novel centrifugal spray tower which is high in yield, low in energy consumption and stable in continuous operation in the industry is realized, energy is saved, the environment is protected, the product yield is improved, and the production cost is reduced;
s7, carrying out cyclone separation on the material subjected to centrifugal spray drying, and washing tail gas generated by the cyclone separation by using a washing tower so as to prevent the tail gas from polluting the environment;
s8, cooling the cyclone-separated dry material powder by introducing air, and avoiding the dry powder from being damped again, wherein the introduced air needs to be dehumidified in the step so as to ensure the dryness of the dry powder;
s9, performing cyclone separation on the dry powder again, packaging the separated dry powder, introducing the separated residue into subsequent processes such as continuous separation in the first cyclone separation, performing cyclone separation on the separated residue again, effectively extracting the residual material powder in the residue, further avoiding material waste, improving the product yield and saving the economic cost.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (8)
1. The production process of the potassium fulvate dry powder comprises the selection of raw materials and the processing and the preparation of the potassium fulvate, and is characterized in that the filtration of molasses alcohol waste mash → concentration → neutralization → heat exchange → hot air drying → separation → cooling → separation → packaging;
s1, selecting the waste mash of the honey-sugar alcohol, introducing the waste mash of the honey-sugar alcohol into a sedimentation basin, and extracting clear liquid of the waste mash of the honey-sugar alcohol through sedimentation at a certain temperature;
s2, gathering sediments of the waste mash of the honey-alcohol after extracting the clear liquid, then introducing the sediments into a filtering tank, squeezing and filtering to extract filtrate, and filtering to obtain sediments to form a filter cake so as to reduce the occupied space of solid residues for subsequent treatment;
s3, introducing the clear liquid and the filtrate into a concentration liquid storage tank for concentration to form a concentrated solution, so that the concentration of the materials is improved, the high-concentration materials are stored in the liquid storage tank, the cleanness degree of the materials is kept, and residual impurities in the materials are avoided;
s4, taking out lime, making the lime into lime milk by using a lime slaker, mixing the lime milk with the concentrated solution, and then stirring uniformly to allow the lime milk to react with the concentrated solution sufficiently so as to neutralize the concentrated solution;
s5, introducing the neutralized material into a drying tower for plate heat exchange, wherein the material needs to be preheated before being introduced into the drying tower, and the material is prevented from being adhered to the inside of the drying tower;
s6, after plate-type heat exchange of the material is completed, the material is introduced into a centrifugal spray drying tower for centrifugal spray drying, impurities are prevented from being contained in introduced hot air in the spray drying process, and the viscous material is prevented from blocking an atomizing nozzle;
s7, carrying out cyclone separation on the material after centrifugal spray drying, and washing tail gas generated by the cyclone separation by a washing tower;
s8, cooling the cyclone-separated dry material powder by introducing air, and avoiding the dry powder from being damped again;
and S9, performing cyclone separation on the dry powder again, and performing powder packaging on the separated dry powder.
2. The process for producing potassium fulvate dry powder according to claim 1, wherein in step S1, the spent mash of the molasses alcohol is settled for a time period of 10 hours or more, the settling temperature is 80 ℃ to 90 ℃, and the settling cross section and flow rate are x.
3. The process for producing potassium fulvate dry powder according to claim 1, wherein in step S3, the concentrated solution storage tank is used for storing the concentrated solution and performing solid-liquid separation on the concentrated solution to ensure the cleanness of the subsequent processes.
4. The process for producing potassium fulvate dry powder according to claim 1, wherein in step S4, the ph value of neutralization is 6.2-6.4, the neutralization time is not less than 2 hours, and the neutralization concentration is not less than 60 brix.
5. The process for producing the potassium fulvate dry powder according to claim 1, wherein in step S5, the temperature of the material entering the drying tower is not less than 85 ℃, hot water generated by the bagasse hot water boiler is used for carrying out hot water circulation heat exchange on the material, and the flow rate of the heat exchange surface is not less than one.
6. The production process of the potassium fulvate dry powder according to claim 1, wherein in step S6, the air inlet temperature of a centrifugal spray drying tower is 260-320 ℃ ± 5 ℃, the exhaust temperature is 90-100 ℃, and the extremely low micro negative pressure in the tower is less than or equal to 100Pa, a bagasse hot blast stove is used for carrying out centrifugal spray drying on the material, so that hot air particulate matters are less than or equal to 120mg/Nm3Necessary support is provided for realizing full water solubility of the product, the temperature of a hearth ranges from 800 ℃ to 1000 ℃, and the temperature of hot air ranges from 260 ℃ to 320 +/-5 ℃ and is stable and controllable.
7. The process for producing potassium fulvate dry powder according to claim 1, wherein in step S8, the introduced air needs to be dehumidified.
8. The process for producing potassium fulvate dry powder according to claim 1, wherein in step S9, the separated residue can be passed to the first cyclone for further separation and other subsequent steps.
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