Production system for producing calcium-magnesium liquid fertilizer from phosphorite byproducts

Abstract

The utility model relates to the technical field of phosphorite by-product utilization, in particular to a production system for producing a calcium-magnesium liquid fertilizer from phosphorite by-products. The utility model discloses a production system for producing a calcium-magnesium liquid fertilizer from phosphorite byproducts. The production system comprises a neutralization kettle, the neutralization kettle is used for carrying out neutralization reaction on the calcium-magnesium concentrated solution; the first filter is connected to the neutralization kettle; the proportioning tank is connected to the first filter; the crystallizer is connected to the proportioning tank; and the emulsifying device is used for emulsifying the feed liquid in the crystallizer. According to the production system disclosed by the invention, the neutralization reaction is carried out in the neutralization kettle, and the emulsification treatment of the crystallizer, the emulsification device and the crystallizer is constructed, so that the produced calcium-magnesium liquid fertilizer has relatively high suspension property and stability and can be better absorbed and utilized by plants, the utilization rate of the fertilizer is increased, and the waste is reduced.

Description

Technical Field

[0001] This application relates to the technical field of phosphate rock by-product utilization, and in particular to a production system for producing calcium-magnesium liquid fertilizer from phosphate rock by-products. Background Technology

[0002] With the development of agricultural modernization, high-efficiency and environmentally friendly liquid fertilizers have gradually become mainstream products in the market. Phosphate rock, as an important mineral resource, has wide applications in agriculture, chemical industry, and other fields. Traditional phosphate rock processing typically employs physical or chemical beneficiation techniques to produce phosphate concentrate. However, physical beneficiation generates a large amount of tailings, while chemical beneficiation produces a large amount of calcium and magnesium concentrate as a byproduct. If this calcium and magnesium concentrate is not effectively utilized, it will not only waste resources but also cause environmental pollution. In recent years, with the development of comprehensive resource utilization technologies, how to convert these byproducts into valuable liquid fertilizers has become a research hotspot.

[0003] Although calcium-magnesium concentrate has high nutritional value and can be directly used in agricultural production, it still faces some technical challenges in practical application. Firstly, the complex composition of calcium-magnesium concentrate, containing various metal ions and other impurities, makes it prone to precipitation and clumping when used directly, affecting the fertilizer's effectiveness and stability. Furthermore, due to the viscosity of calcium-magnesium concentrate, existing emulsification and mixing technologies struggle to ensure the fertilizer's uniformity and stability, thus limiting its application in field cultivation.

[0004] Therefore, this application proposes a production system for producing calcium and magnesium liquid fertilizer from phosphate rock by-products. Utility Model Content

[0005] To overcome the shortcomings of existing technologies, a production system for producing calcium-magnesium liquid fertilizer from phosphate rock by-products is proposed. The system uses calcium-magnesium concentrate as raw material, which is neutralized in a neutralization kettle and then emulsified and ground in an emulsification device to obtain a multifunctional liquid fertilizer.

[0006] The technical solution adopted by this application to solve its technical problem is:

[0007] A production system for producing calcium-magnesium liquid fertilizer from phosphate rock byproducts includes a neutralization reactor; the neutralization reactor is used for neutralization reaction of calcium-magnesium concentrate.

[0008] A first filter is connected to the neutralization vessel;

[0009] A mixing tank, which is connected to the first filter;

[0010] A crystallizer connected to the mixing tank;

[0011] An emulsifying device for emulsifying the liquid material in a crystallizer.

[0012] As a preferred technical solution, the feed inlet of the neutralization vessel is connected to the alkali tank.

[0013] As a preferred technical solution, it also includes an auxiliary material tank, which is connected to the proportioning tank.

[0014] As a preferred technical solution, the emulsification device includes a rubber mill, the feed inlet of which is connected to the feed inlet of the crystallizer, and the discharge outlet of which is connected to the discharge outlet of the crystallizer.

[0015] As a preferred technical solution, the crystallizer is equipped with a cooling device.

[0016] As a preferred technical solution, a second filter is also included, which is connected to the outlet of the crystallizer.

[0017] As a preferred technical solution, the system also includes a bottling device connected to a second filter.

[0018] As a preferred technical solution, the system also includes a calcium-magnesium concentrate buffer tank, which is connected to a neutralization vessel.

[0019] As a preferred technical solution, a stirrer is provided in the mixing tank.

[0020] As a preferred technical solution, the neutralization vessel is equipped with a heater.

[0021] The beneficial effects of this application are as follows:

[0022] The production system described in this application, through neutralization reaction in a neutralization vessel and emulsification treatment involving a crystallizer → emulsification device → crystallizer, ensures that the produced calcium-magnesium liquid fertilizer has high suspension and stability, can be better absorbed and utilized by plants, improves fertilizer utilization rate, and reduces waste.

[0023] The production system described in this application produces a calcium-magnesium liquid fertilizer that is rich in calcium, magnesium, and other medium-quantity elements. This fertilizer can effectively improve the physical and chemical properties of the soil, enhance its water and fertilizer retention capacity, and increase the yield and quality of crops.

[0024] The production system described in this application generates relatively little wastewater during the production process. Through reasonable equipment configuration, it can effectively reduce environmental pollution, meet modern environmental protection requirements, and contribute to the sustainable development of the enterprise. Attached Figure Description

[0025] The present application will be further described below with reference to the accompanying drawings and embodiments.

[0026] Figure 1 This is a schematic diagram of the structure of a production system for producing calcium and magnesium liquid fertilizer from phosphate rock by-products as described in this application;

[0027] Figure 2 This is another schematic diagram of the production system for producing calcium and magnesium liquid fertilizer from phosphate rock by-products as described in this application;

[0028] Figure 3 This is a schematic diagram of the material flow during operation of a production system for producing calcium and magnesium liquid fertilizer from phosphate rock by-products as described in this application.

[0029] The components include: 1. Neutralization vessel; 2. First filter; 3. Proportioning tank; 4. Crystallizer; 5. Emulsification device; 6. Alkali tank; 7. Auxiliary material tank; 8. Second filter; 9. Calcium and magnesium concentrate buffer tank; 10. Barrel filling device; 101. Heater; 401. Cooling device; 402. Stirrer; 501. Gel mill. Detailed Implementation

[0030] The following will clearly and completely describe the concept, specific structure, and resulting technical effects of this application in conjunction with embodiments and accompanying drawings, so as to fully understand the purpose, features, and effects of this application. Obviously, the described embodiments are only a part of the embodiments of this application, not all of them. Other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are all within the scope of protection of this application. Furthermore, all connections / linkages involved in the patent do not simply refer to direct contact between components, but rather to the ability to form a better connection structure by adding or reducing connecting accessories according to specific implementation conditions. The various technical features in this application can be combined interactively without contradicting each other.

[0031] like Figure 1 As shown, a production system for producing calcium-magnesium liquid fertilizer from phosphate rock by-products includes a neutralization reactor 1; the neutralization reactor 1 is used for neutralizing calcium-magnesium concentrate.

[0032] First filter 2, the first filter 2 is connected to the neutralization vessel 1;

[0033] Proportioning tank 3, which is connected to the first filter 2;

[0034] Crystallizer 4, which is connected to the mixing tank 3;

[0035] Emulsification device 5, which is used to emulsify the liquid in crystallizer 4.

[0036] Specifically, the calcium-magnesium concentrate is neutralized in a neutralization vessel to remove harmful impurities, producing calcium-magnesium salts and water. After neutralization, a neutralized liquid is obtained and introduced into a first filter to remove filter residue and a first filtrate. The first filter removes solid impurities from the neutralized liquid, ensuring its purity. The first filtrate is then introduced into a mixing tank and mixed with other additives to prepare a corresponding liquid fertilizer, forming a mixed liquid. The mixed liquid is thoroughly mixed and introduced into a crystallizer for crystallization, yielding a crystalline liquid. A high-speed rotating grinding disc in an emulsifying device breaks the crystals in the crystalline liquid into finer particles, improving the stability and suspension of the liquid fertilizer, thus forming an emulsified liquid fertilizer.

[0037] Understandably, in this application, calcium-magnesium concentrate is primarily a byproduct generated during the dry beneficiation process of phosphate rock. This byproduct mainly contains medium-level elements such as calcium (Ca) and magnesium (Mg), as well as other trace elements and small amounts of harmful impurities. Calcium-magnesium concentrate is typically liquid with high concentration and viscosity, and is a nutrient-rich liquid.

[0038] Therefore, the above-mentioned technical solution can effectively remove harmful impurities such as heavy metal ions and acidic substances from the calcium and magnesium concentrate by neutralizing it in a neutralization vessel, thus avoiding the negative impact of these impurities on crop growth.

[0039] like Figure 2 As shown, in one or more embodiments, the feed inlet of the neutralization vessel 1 is connected to the alkali tank 6.

[0040] Specifically, several alkali tanks can be set up, and the alkali tanks can hold alkaline solutions such as ammonia water, calcium hydroxide solution, and sodium hydroxide solution; by introducing the alkali solution in the alkali tank into the neutralization kettle, a neutralization reaction is carried out to form a neutralized solution with pH=4-6.

[0041] Specifically, a filter press is selected as the first filter. The neutralized liquid is pumped into the first filter for filtration. The separated filter residue can be used for further processing or recycling. The separated first filtrate is pumped into a mixing tank.

[0042] In one or more embodiments, it further includes an auxiliary material tank 7, which is connected to the proportioning tank.

[0043] Specifically, the auxiliary material tanks can be set up according to actual needs, and there can be several. For example, auxiliary material tanks containing fish protein peptides, auxiliary material tanks containing humic acid, and auxiliary material tanks containing trace elements can be set up.

[0044] By adding the auxiliary materials from the auxiliary material tank to the proportioning tank and mixing them thoroughly with the first filtrate, a proportioned liquid is obtained. This proportioned liquid can be adjusted and set according to the actual situation.

[0045] In one or more embodiments, the emulsifying device 5 includes a rubber mill 501, the feed port of which is connected to the feed port of the crystallizer 4, and the discharge port of which is connected to the discharge port of the crystallizer 4.

[0046] Specifically, the feed inlet of the colloid mill is connected to the discharge outlet of the crystallizer, and the discharge outlet is connected to the feed inlet of the crystallizer. The high-speed rotating grinding disc of the colloid mill repeatedly breaks the crystals in the molten material into finer particles, forming a closed-loop circulation system to ensure effective emulsification.

[0047] Therefore, through the above technical solution, the proportioned liquid is introduced into the crystallizer for crystallization, and the liquid is circulated and emulsified by a rubber mill to obtain an emulsified liquid.

[0048] In one or more embodiments, the crystallizer 4 is provided with a cooling device 401.

[0049] Specifically, during the crystallization process, the crystallizer needs to be cooled. Therefore, a cooling device is used to cool the liquid material inside the crystallizer. Common cooling equipment can be used to achieve the cooling effect. For example, the cooling device includes using a cooler or refrigerant pipes to cool the liquid material inside the crystallizer.

[0050] In one or more embodiments, a second filter 8 is further included, which is connected to the outlet of the crystallizer 4.

[0051] Specifically, the second filter filters the liquid after crystallization and emulsification in the crystallizer to obtain filter residue and second filtrate. This removes residual impurities or impurities that are not easily soluble in water, ensuring the purity of the second filtrate and yielding emulsified liquid fertilizer.

[0052] In one or more embodiments, a drum device 10 is also included, which is connected to the second filter 8.

[0053] Specifically, the second filter filters the emulsified liquid fertilizer, which is then transported through pipelines to a bottling unit for automatic metering and packaging, ultimately yielding the finished liquid fertilizer.

[0054] More specifically, the containerization equipment can include common fertilizer dispensing equipment, which can be used to dispense liquid fertilizer.

[0055] In one or more embodiments, a calcium-magnesium concentrate buffer tank 9 is further included, which is connected to the neutralization vessel 1.

[0056] Specifically, the calcium-magnesium concentrate buffer tank is used to receive the calcium-magnesium concentrate.

[0057] In one or more embodiments, a stirrer 402 is provided in the mixing tank 3.

[0058] Specifically, the stirrer is used to stir the liquid in the mixing tank to ensure that the liquid is fully mixed and to maintain the uniformity of fertilizer concentration and content.

[0059] In one or more embodiments, a heater 101 is provided on the neutralization vessel 1.

[0060] Specifically, if the neutralization reaction needs to be carried out at a certain temperature, the neutralization vessel is heated by a heater to increase the temperature of the neutralization reaction and accelerate the neutralization reaction.

[0061] In summary, as Figure 3 As shown, a production system for producing calcium-magnesium liquid fertilizer from phosphate rock byproducts is described below, with the specific working process as follows:

[0062] 1. Preparation of calcium and magnesium concentrate

[0063] The calcium-magnesium concentrate produced during the dry beneficiation process is transported to a calcium-magnesium solution buffer tank to ensure a stable supply of the concentrate.

[0064] Meanwhile, the alkali solution in the alkali tank is prepared and transported to the neutralization vessel through pipelines.

[0065] 2. Neutralization reaction

[0066] Neutralization vessel: Calcium and magnesium concentrate and alkali solution are transported to the neutralization vessel through pipelines.

[0067] In the neutralization vessel, the concentrated calcium-magnesium solution and the alkaline solution are thoroughly mixed by stirring, resulting in a neutralization reaction that produces calcium-magnesium salts and water. A heater installed on the neutralization vessel provides the necessary heat to ensure the reaction proceeds smoothly.

[0068] 3. First Filter

[0069] First filter: The neutralized liquid is transported through a pipeline to the first filter to remove the generated solid impurities and obtain a relatively pure first filtrate.

[0070] 4. Proportioning and Mixing

[0071] Proportioning tank: The first filtrate, after passing through the first filter, is transported to the proportioning tank through a pipeline. In the proportioning tank, auxiliary materials (such as trace elements, organic matter, etc.) are added and thoroughly mixed using a stirrer to ensure the uniformity of the raw materials.

[0072] Auxiliary material tank: The auxiliary materials in the auxiliary material tank are transported to the proportioning tank through pipelines and mixed with calcium magnesium solution.

[0073] 5. Crystallization treatment

[0074] Crystallizer: The mixed liquid is transported to the crystallizer through pipelines. The crystallizer is equipped with a cooling device, which cools the liquid to cause certain components to crystallize and precipitate, forming fine crystals.

[0075] Cooling device: The liquid material in the crystallizer is cooled by the cooling device of the crystallizer.

[0076] 6. Emulsification treatment

[0077] Emulsification Unit: The crystallized liquid is transported to the emulsification unit through pipelines. Inside the emulsification unit is a grinding mill, which uses a high-speed rotating grinding disc to break the crystals in the liquid into finer particles, ensuring the stability and suspension of the liquid fertilizer.

[0078] Cooling device: The emulsified liquid is cooled down by the cooling device of the crystallizer to bring it to room temperature.

[0079] Second filter: The cooled liquid is transported through pipelines to the second filter to remove residual impurities and ensure the purity of the liquid.

[0080] 7. Packaging

[0081] Bottled bottling unit: The filtered liquid is transported through pipelines to the bottled bottling unit for automatic metering and packaging, ultimately yielding the finished liquid fertilizer.

[0082] The production system for producing calcium-magnesium liquid fertilizer from phosphate rock by-products disclosed in this application effectively solves the problems of precipitation and clumping that easily occur when calcium-magnesium concentrate is directly used through steps such as neutralization, filtration, proportioning, crystallization and emulsification. This improves the uniformity and stability of the fertilizer and realizes the efficient utilization of phosphate rock by-products.

[0083] The above is a detailed description of the preferred embodiments of this application. However, the invention of this application is not limited to the embodiments described. Those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of this application. All such equivalent modifications or substitutions are included within the scope defined by the claims of this application.

Claims

1. A production system for producing calcium-magnesium liquid fertilizer from a phosphor ore by-product, characterized by, It comprises a neutralization kettle (1) for neutralization reaction of calcium and magnesium concentrate solution; A first filter (2) connected to the neutralization kettle (1); A proportioning tank (3) connected to the first filter (2); A crystallizer (4) connected to the proportioning tank (3); An emulsifying device (5) for emulsifying the liquid in the crystallizer (4).

2. The production system according to claim 1, characterized in that, The feed inlet of the neutralization kettle (1) is connected to a lye tank (6).

3. The production system of claim 1, wherein, It also comprises an auxiliary material tank (7) connected to the proportioning tank (3).

4. The production system of claim 1, wherein, The emulsifying device (5) comprises a colloid mill (501), the feed inlet of which is connected to the feed inlet of the crystallizer (4), and the discharge outlet of which is connected to the discharge outlet of the crystallizer (4).

5. The production system of claim 1, wherein, The crystallizer (4) is provided with a cooling device (401).

6. The production system of claim 1, wherein, It also comprises a second filter (8) connected to the discharge outlet of the crystallizer (4).

7. The production system of claim 6, wherein, It also comprises a barrel filling device (10) connected to the second filter (8).

8. The production system of claim 1, wherein, It also comprises a calcium and magnesium concentrate solution buffer tank (9) connected to the neutralization kettle (1).

9. The production system of claim 1, wherein, The proportioning tank (3) is provided with a stirrer (402).

10. The production system of claim 1, wherein, The neutralization kettle (1) is provided with a heater (101).

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