System for preparing acid aqueous fertilizer from raffinate acid

Abstract

The utility model provides a kind of raffinate acid preparation acidic water-soluble fertilizer system, including stirred tank, temperature control component and shearing mechanism, the temperature control component is installed in the stirred tank;The shearing mechanism includes rotor and stator, the stator is coaxially fixed connection with the stirred tank, the rotor rotation is installed on the stirred tank and is rotationally connected with the stator;Driving device for driving the rotor rotation is installed on the stirred tank;The stator is sequentially installed with several groups of shear blades from top to bottom, the shear blade is inclinedly arranged in ladder type structure, and a plurality of filter holes are provided on the stator.The utility model can solve the shearing mechanism shearing area fixed in prior art, cannot realize the staged processing of slurry, leading to low shearing efficiency, it is difficult to avoid that slurry forms temporary flocculation after high-pressure shearing, and affects the stability of product.

Description

Technical Field

[0001] This utility model relates to the field of chemical technology, specifically to a system for preparing acidic water-soluble fertilizer from residual raffinate. Background Technology

[0002] Water-soluble fertilizer is a new type of fertilizer that has been developed in my country in recent years. It is a multi-element compound fertilizer that dissolves completely in water, making it easier for crops to absorb and resulting in a relatively high absorption and utilization rate. It can meet the nutritional needs of high-yield crops during their rapid growth period. Especially in facility agriculture, its application in conjunction with micro-sprinkler irrigation and drip irrigation systems allows for water-fertilizer integration, achieving water, fertilizer, and labor savings. In today's increasingly water-scarce environment, the application of water-soluble fertilizer has become one of the measures to increase agricultural efficiency and farmers' income.

[0003] Existing technologies often involve neutralizing wet phosphoric acid with ammonia gas, and then filtering the neutralized slurry through a vacuum drum filter to obtain a clear monoammonium phosphate solution and filter residue rich in soluble phosphates. However, this process requires high-cost wet phosphoric acid and complex operations such as filtration and flash evaporation, which further increases production costs.

[0004] This application uses residual acid as the raw material, which is neutralized with ammonia before being fed into a reaction vessel for high-speed shearing and stirring. However, if conventional shearing mechanisms are used directly to shear the slurry, local blockage is likely to occur during the shearing process. Furthermore, the shearing area of ​​existing shearing mechanisms is fixed, making it impossible to achieve staged processing of the slurry, resulting in low shearing efficiency and making it difficult to avoid temporary flocculation of the slurry after high-pressure shearing, which affects product stability. Utility Model Content

[0005] The purpose of this invention is to provide a system for preparing acidic water-soluble fertilizer from residual leaching acid. In practical use, this system can solve the problems in the prior art where the shearing area of ​​the shearing mechanism is fixed, making it impossible to achieve staged processing of the slurry, resulting in low shearing efficiency and difficulty in avoiding temporary flocculation of the slurry after high-pressure shearing, which affects product stability.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0007] A system for preparing acidic water-soluble fertilizer from residual leaching acid includes a stirred tank, a temperature control component, and a shearing mechanism, wherein the temperature control component is installed inside the stirred tank;

[0008] The shearing mechanism includes a rotor and a stator. The stator is coaxially and fixedly connected to the stirring vessel. The rotor is rotatably mounted on the stirring vessel and rotatably connected to the stator. A drive device for driving the rotor to rotate is installed on the stirring vessel.

[0009] The stator is equipped with several sets of shear blades from top to bottom. The shear blades are arranged in a stepped structure and are inclined. The stator is provided with several filter holes.

[0010] Preferably, the stirred tank is provided with a heat-insulating jacket, the temperature control component includes a heater and a circulation pump, the heat-insulating jacket is provided with an inlet pipe and a return pipe for connecting to the heater, and the circulation pump is installed on the heat-insulating jacket and is used to provide power for the circulation of the heat transfer medium.

[0011] Preferably, the stator is detachably connected to the stirring vessel.

[0012] Preferably, the rotor is provided with a cooling chamber, the cooling chamber is provided with a liquid injection port, and the rotor is equipped with heat sinks, one end of which extends into the cooling chamber and the other end is used to contact the slurry.

[0013] Preferably, a protrusion is connected to the inner wall of the stator.

[0014] Preferably, the protrusion is inclined.

[0015] Preferably, the stirring vessel is provided with an installation groove that communicates with the insulation jacket, and a heat-conducting plate is installed in the installation groove.

[0016] Preferably, the heat-conducting sheet is provided with serrated grooves.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] In this invention, there are three sets of shear blades; after the drive device is started, it can drive the rotor to rotate; the slurry enters the area between the shear blades and the inner wall of the stator under the pressure of fluid and the push of the shear blades; the gap between the uppermost shear blade and the inner wall of the stator is larger, which is used to gather and accelerate the slurry and push it smoothly to the middle shear blade.

[0019] The gap between the middle shear blade and the inner wall of the stator is the smallest, and a shearing zone is formed between the middle shear blade and the inner wall of the stator. The filter holes are arranged corresponding to the shearing zone. As the rotor and the shear blade rotate, the slurry passes through the narrow gap between the shear blade and the inner wall of the stator. The slurry is broken and refined by huge shearing force and the components in the slurry are initially mixed.

[0020] The shear blades at the bottom form a mixing zone with a gap larger than the shearing zone between them and the inner wall of the stator. The pressure of the slurry that has undergone high-pressure shearing is reduced here, generating turbulence; ensuring that the portion of the slurry flowing downward from the shearing zone is fully mixed. Attached Figure Description

[0021] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0022] Figure 1 This is a perspective view of the present invention.

[0023] Figure 2 This is a schematic diagram of the structure of this utility model.

[0024] Figure 3 This is a schematic diagram of the shearing mechanism in this utility model.

[0025] The attached diagram lists the components represented by each number as follows:

[0026] 101-Temperature control component, 102-Shearing mechanism, 103-Rotor, 104-Stator, 105-Drive device, 106-Shearing blade, 107-Insulation jacket, 108-Circulating pump, 109-Cooling chamber, 110-Heat sink, 111-Protrusion, 112-Heat conductive plate, 113-Stirring vessel, 114-Filter hole. Detailed Implementation

[0027] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of the present invention. Therefore, the drawings and description are considered to be exemplary in nature and not restrictive.

[0028] In the description of the embodiments of this utility model, it should be understood that the terms "length", "vertical", "horizontal", "top", "bottom", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing the embodiments of this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this utility model.

[0029] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of embodiments of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0030] In this embodiment of the invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this embodiment of the invention according to the specific circumstances.

[0031] In this embodiment of the invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0032] The following disclosure provides many different implementations or examples for different structures of the embodiments of the present invention. To simplify the disclosure of the embodiments of the present invention, components and arrangements of specific examples are described below. Of course, these are merely examples and are not intended to limit the embodiments of the present invention. Furthermore, reference numerals and / or reference letters may be repeated in different examples of the embodiments of the present invention; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various implementations and / or arrangements discussed.

[0033] The embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0034] See Figures 1-3 This embodiment discloses a shearing device for shearing slurry during the preparation of water-soluble fertilizer; specifically, it is a system for preparing acidic water-soluble fertilizer from residual raffinate, including a stirring tank 113, a temperature control component 101, and a shearing mechanism 102, wherein the temperature control component 101 is installed inside the stirring tank 113;

[0035] The shearing mechanism 102 includes a rotor 103 and a stator 104. The stator 104 is coaxially and fixedly connected to the stirring vessel 113. The rotor 103 is rotatably mounted on the stirring vessel 113 and rotatably connected to the stator 104. A driving device 105 for driving the rotor 103 to rotate is installed on the stirring vessel 113.

[0036] The stator 104 is provided with several sets of shear blades 106 installed from top to bottom. The shear blades 106 are arranged in a stepped structure and are inclined. The stator 104 is provided with several filter holes 114.

[0037] In this embodiment, the tilting direction of the shear blades 106 is the same as the rotation direction of the rotor 103, so that the tilted surface of the shear blades 106 can more effectively push the material during rotation, causing the material to flow directionally towards the shearing zone, thereby drawing the material and liquid into the shearing zone; after the slurry is added to the mixing tank 113, the shearing mechanism 102 shears and stirs the slurry; there are three sets of shear blades 106, and the gap between the three sets of shear blades 106 and the inner wall of the stator 104 first decreases and then increases. Each set of shear blades 106 is evenly spaced along the circumference of the rotor 103; after the drive device 105 is started, it can drive the rotor 103 to rotate; the slurry enters the area between the shear blades 106 and the inner wall of the stator 104 under the pressure of fluid and the push of the shear blades 106; the gap between the uppermost shear blade 106 and the inner wall of the stator 104 is larger, which is used to gather and accelerate the slurry, and smoothly push it to the middle shear blade 106 to prevent blockage in subsequent areas; the gap between the middle shear blade 106 and the inner wall of the stator 104 is larger. The gap is the smallest, and a shearing zone is formed between the middle shear blade 106 and the inner wall of the stator 104. The filter hole 114 is correspondingly arranged with the shearing zone. As the rotor 103 and the shear blade 106 rotate, the slurry passes through the narrow gap between the shear blade 106 and the inner wall of the stator 104. The slurry, subjected to huge shearing force, is broken and refined, and the components in the slurry are initially mixed. The slurry, which is fully refined and mixed in the shearing zone, is discharged through the filter hole 114. The shear blade 106 at the bottom and the stator 104 form a shearing zone. A mixing zone with a gap larger than the shear zone is formed between the inner walls. Part of the slurry that has undergone high-pressure shearing moves to this zone where the pressure decreases, generating turbulence. This ensures that the slurry flowing downwards from the shear zone is fully mixed, forming a highly homogeneous system and dispersing any temporary flocculation that may have formed due to high-pressure shearing, making the product more stable. Under the action of fluid dynamics, a portion of the slurry mixed in the mixing zone flows back to the inlet of the shear zone for internal circulation. The dispersed and further refined slurry is extruded through the filter holes 114 provided on the stator 104 wall. A temperature control component 101 installed in the mixing vessel 113 is used to maintain an appropriate temperature within the mixing vessel 113, preventing excessively low temperatures from causing crystallization of certain salts or excessively high temperatures from causing decomposition of active ingredients; and keeping the slurry within a suitable viscosity range to ensure shearing and mixing efficiency.

[0038] In some embodiments, the stirred tank 113 is provided with a heat-insulating jacket 107. The temperature control component 101 includes a heater and a circulation pump 108. The heat-insulating jacket 107 is provided with an inlet pipe and a return pipe for connection to the heater. The circulation pump 108 is installed on the heat-insulating jacket 107 and is used to provide power for the circulation of the heat transfer medium. In this embodiment, in order to avoid the decomposition of the active ingredients, it is necessary to reduce the heat loss in the stirred tank 113. The heater actively replenishes the heat by circulating a heat transfer medium, such as heat transfer oil or hot water, into the heat-insulating jacket 107. The circulation pump 108 ensures that the heat transfer medium flows uniformly within the jacket, avoiding excessively low local temperatures on the walls of the stirred tank 113.

[0039] In some embodiments, the stator 104 is detachably connected to the mixing vessel 113. In this embodiment, the stator 104 is detachably connected to the mixing vessel 113 by bolts, thereby facilitating the cleaning and replacement of the stator 104.

[0040] In some embodiments, a cooling chamber 109 is provided inside the rotor 103, and a liquid injection port is provided on the cooling chamber 109. A heat sink 110 is installed on the rotor 103, with one end of the heat sink 110 extending into the cooling chamber 109 and the other end for contacting the slurry. In this embodiment, the liquid injection port can be opened and closed as needed by the operator using a conventional sealing valve in the prior art. Cooling medium can be injected into the cooling chamber 109 through the liquid injection port. Intense friction occurs between the shear blades 106 and the slurry, generating localized frictional heat, resulting in a shearing area temperature near the shear blades 106 that is higher than the overall temperature of the mixing vessel 113. By providing a cooling chamber 109 on the rotor 103, the cooling medium can absorb the frictional heat generated on the shear blades 106, reducing the local temperature and preventing heat accumulation on the inner wall of the stator 104. The operator can replace the cooling medium in the cooling chamber 109 using a conventional suction device in the prior art, depending on the specific usage.

[0041] In some embodiments, a protrusion 111 is connected to the inner wall of the stator 104. In this embodiment, a liquid polymer additive needs to be added when the shear blade 106 is stirring the slurry; by setting the protrusion 111, the liquid can turbulently flow through the slurry, and after the slurry is split on both sides of the protrusion 111, a small vortex can be formed behind the protrusion 111, increasing the contact area between the additive and the slurry, mixing the floating additive into the interior of the slurry, and avoiding uneven dispersion of the additive.

[0042] In some embodiments, the protrusion 111 is inclined. In this embodiment, the protrusion 111 is inclined in the opposite direction to the rotation direction of the slurry. The inclined surface formed by the reverse-inclined protrusion 111 can generate resistance to the slurry rotating with the shear blade 106, further improving the mixing effect of the additive and the slurry.

[0043] In some embodiments, the stirring vessel 113 is provided with a mounting groove communicating with the insulation jacket 107, and a heat-conducting plate 112 is installed in the mounting groove. In this embodiment, one end of the heat-conducting plate 112 is used to contact the slurry, and the other end is used to contact the heat-conducting medium, thereby improving the heat exchange efficiency between the heat-conducting medium and the slurry.

[0044] In some embodiments, the heat-conducting sheet 112 is provided with serrated grooves. In this embodiment, the serrated grooves form an uneven structure on the surface of the heat-conducting sheet 112, which can increase the contact area between the heat-conducting sheet 112 and the slurry, and further improve the heat preservation effect.

[0045] Although preferred embodiments of the present invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of the present invention.

[0046] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. It should be noted that any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A system for preparing acidic water-soluble fertilizer from residual leaching acid, comprising a stirred tank (113), characterized in that: It also includes a temperature control component (101) and a shearing mechanism (102), wherein the temperature control component (101) is installed inside the stirring vessel (113); The shearing mechanism (102) includes a rotor (103) and a stator (104). The stator (104) is coaxially and fixedly connected to the stirring vessel (113). The rotor (103) is rotatably mounted on the stirring vessel (113) and rotatably connected to the stator (104). A driving device (105) for driving the rotor (103) to rotate is installed on the stirring vessel (113). The stator (104) is provided with several sets of shear blades (106) from top to bottom. The shear blades (106) are arranged in a stepped structure and are inclined. The stator (104) is provided with several filter holes (114).

2. The system for preparing acidic water-soluble fertilizer from residual leaching acid according to claim 1, characterized in that: The stirred tank (113) is provided with a heat-insulating jacket (107). The temperature control component (101) includes a heater and a circulation pump (108). The heat-insulating jacket (107) is provided with an inlet pipe and a return pipe for connecting to the heater. The circulation pump (108) is installed on the heat-insulating jacket (107) and is used to provide power for the circulation of the heat transfer medium.

3. The system for preparing acidic water-soluble fertilizer from residual leaching acid according to claim 1, characterized in that: The stator (104) is detachably connected to the stirring vessel (113).

4. The system for preparing acidic water-soluble fertilizer from residual leaching acid according to claim 1, characterized in that: The rotor (103) is provided with a cooling chamber (109), the cooling chamber (109) is provided with a liquid injection port, and the rotor (103) is equipped with a heat sink (110). One end of the heat sink (110) extends into the cooling chamber (109), and the other end is used to contact the slurry.

5. The system for preparing acidic water-soluble fertilizer from residual leaching acid according to claim 1, characterized in that: The stator (104) has a protrusion (111) connected to its inner wall.

6. The system for preparing acidic water-soluble fertilizer from residual leaching acid according to claim 5, characterized in that: The protrusion (111) is inclined.

7. The system for preparing acidic water-soluble fertilizer from residual leaching acid according to claim 2, characterized in that: The stirring vessel (113) is provided with an installation groove that communicates with the insulation jacket (107), and a heat-conducting plate (112) is installed in the installation groove.

8. The system for preparing acidic water-soluble fertilizer from residual leaching acid according to claim 7, characterized in that: The heat-conducting sheet (112) is provided with a serrated groove.

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