System for preparing urea solution

By using compressed air to transport urea particles and combining it with stirring and heating components, the problems of low urea particle transport efficiency and high cost were solved, achieving efficient and low-cost urea solution preparation.

WO2026103220A1PCT designated stage Publication Date: 2026-05-21INNER MONGOLIA FENGDIAN ENERGY POWER GENERATION CO LTD
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Patent Information

Authority / Receiving Office
WO · WO
Patent Type
Applications
Current Assignee / Owner
INNER MONGOLIA FENGDIAN ENERGY POWER GENERATION CO LTD
Filing Date
2025-07-29
Publication Date
2026-05-21

AI Technical Summary

Technical Problem

The existing technology suffers from low efficiency and high cost in transporting urea granules.

Method used

Compressed air is used to transport urea granules from the first storage tank to the dissolving tank via a transport component. Combined with a stirring component and a heating component, the efficient dissolution of urea granules and the stability of the solution are ensured. Temperature sensors and density sensors are used to monitor the dissolution process.

Benefits of technology

This improved the transportation efficiency of urea granules, reduced transportation costs, and prevented urea solution crystallization by using a heating component, thus ensuring the efficient preparation of urea solution.

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Abstract

Disclosed in the present invention is a system for preparing a urea solution. The system for preparing a urea solution comprises a first storage tank, a transport assembly, and a dissolution tank, wherein the first storage tank is configured to store urea particles; the transport assembly comprises a transport pipe and a compression member, wherein the transport pipe is in communication with the first storage tank, such that the urea particles in the first storage tank flow into the transport pipe, and the compression member is configured to generate compressed air and is in communication with the transport pipe, such that the compressed air flows into the transport pipe to transport the urea particles; and the dissolution tank is in communication with the transport pipe, such that the urea particles in the transport pipe flow into the dissolution tank to be dissolved into a urea solution. The system for preparing a urea solution of the present invention has the advantages of low costs, simple structure, etc.
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Description

Urea solution preparation system Technical Field

[0001] This invention relates to the field of urea solution preparation technology, and more specifically, to a urea solution preparation system. Background Technology

[0002] A urea solution preparation system is a device used to dissolve urea granules into a urea solution. It mainly includes processes such as urea granule storage, transportation, dissolution, stirring, heating, and storage. Through automated and intelligent design, this system ensures the efficient preparation and storage of urea solutions.

[0003] In related technologies, urea granules are transported to the dissolving tank by transport vehicles, which results in low transportation efficiency and high transportation costs. Summary of the Invention

[0004] The present invention aims to at least partially solve one of the technical problems in the related art.

[0005] Therefore, embodiments of the present invention propose a urea solution preparation system with high transportation efficiency and low transportation cost.

[0006] A urea solution preparation system according to an embodiment of the present invention includes: a first storage tank for storing urea particles; a transport assembly including a transport pipe and a compressor, the transport pipe being connected to the first storage tank so that urea particles in the first storage tank flow into the transport pipe, the compressor being used to generate compressed air, the compressor being connected to the transport pipe so that the compressed air flows into the transport pipe to transport the urea particles; and a dissolving tank connected to the transport pipe so that urea particles in the transport pipe flow into the dissolving tank to dissolve the urea particles into a urea solution.

[0007] In some embodiments, the urea solution preparation system further includes: a stirring assembly rotatably disposed within the dissolving tank to stir the urea solution within the dissolving tank; a first heating assembly disposed within the dissolving tank and located at the bottom of the dissolving tank, wherein the first heating assembly is used to heat the urea solution within the dissolving tank when the temperature of the dissolving tank is lower than a first preset value; and an exhaust assembly disposed on and located at the top of the first storage tank to exhaust air from the first storage tank.

[0008] The urea solution preparation system of the present invention includes a first storage tank, a transport component, and a dissolving tank. Urea particles in the first storage tank are transported to the dissolving tank by compressed air. The transport efficiency is high, manpower is saved, and transport costs are reduced, thereby reducing the preparation cost of the urea solution preparation system.

[0009] In some embodiments, the urea solution preparation system further includes a second storage tank, which is located on one side of the dissolving tank and communicates with the dissolving tank, so that the urea solution in the dissolving tank flows into the second storage tank for storage.

[0010] In some embodiments, the urea solution preparation system further includes a connecting pipe, the two ends of which are connected to the dissolving tank and the second storage tank, respectively, so that the urea solution in the dissolving tank flows into the second storage tank through the connecting pipe.

[0011] In some embodiments, the urea solution preparation system further includes a third heating component surrounding the outer periphery of the connecting tube, so that the third heating component heats the urea solution within the connecting tube.

[0012] In some embodiments, the urea solution preparation system further includes: a temperature sensor disposed within the dissolving tank to detect the temperature within the dissolving tank, such that when the temperature within the dissolving tank is lower than a preset value, the first heating component is activated to heat the urea solution; a liquid level sensor disposed within the dissolving tank for detecting the urea solution within the dissolving tank; and a density sensor disposed within the dissolving tank for detecting the density of the urea solution within the dissolving tank.

[0013] In some embodiments, the urea solution preparation system further includes a circulation pump located on one side of the dissolving tank, with one end of the circulation pump connected to the bottom of the dissolving tank so that the urea solution in the dissolving tank flows into the circulation pump, and the other end of the circulation pump connected to the top of the dissolving tank so that the urea pumped by the circulation pump flows into the dissolving tank.

[0014] In some embodiments, the urea solution preparation system further includes a second heating component located at the bottom of the second storage tank. When the temperature inside the second storage tank is lower than a preset value, the second heating component heats the urea solution inside the second storage tank.

[0015] In some embodiments, the urea solution preparation system further includes a base with a height of not less than 100 mm, and the first storage tank is disposed on the base.

[0016] In some embodiments, the transport assembly further includes a lifting member disposed inside the first storage tank, one end of which is located at the bottom of the first storage tank, and the other end of which cooperates with the transport pipe so that urea particles in the first storage tank are transported through the lifting member to the transport pipe. Attached Figure Description

[0017] Figure 1 is a schematic diagram of the urea solution preparation system according to an embodiment of the present invention.

[0018] Urea solution preparation system 100;

[0019] First storage tank 1; ventilation assembly 11;

[0020] Transport component 2; transport pipe 21; compression component 22;

[0021] Dissolving tank 3; stirring assembly 31; first heating assembly 32:

[0022] Storage tank 4; connecting pipe 5; third heating component 6;

[0023] Circulation pump 7; Second storage tank 8; Water storage tank 9. Detailed Implementation

[0024] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0025] A urea solution preparation system 100 according to an embodiment of the present invention will now be described with reference to the accompanying drawings.

[0026] As shown in Figure 1, the urea solution preparation system 100 according to an embodiment of the present invention includes a first storage tank 1, a transport component 2, and a dissolving tank 3.

[0027] The first storage tank 1 is used to store urea granules. Specifically, as shown in Figure 1, the first storage tank 1 is a urea storage tank 4 used to store urea granules.

[0028] The transport assembly 2 includes a transport pipe 21 and a compressor 22. The transport pipe 21 is connected to the first storage tank 1 so that urea particles in the first storage tank 1 flow into the transport pipe 21. The compressor 22 is used to generate compressed air and is connected to the transport pipe 21 so that compressed air flows into the transport pipe 21 to transport the urea particles. Specifically, as shown in Figure 1, the inlet of the transport pipe 21 is connected to the first storage tank 1 so that urea particles in the first storage tank 1 flow into the transport pipe 21. The compressor 22 can compress air to generate compressed air and is connected to the transport pipe 21 so that compressed air flows into the transport pipe 21, thereby transporting the urea particles by compressed air.

[0029] The dissolving tank 3 is connected to the transport pipe 21 so that the urea particles in the transport pipe 21 flow into the dissolving tank 3 to dissolve the urea particles into a urea solution. Specifically, as shown in Figure 1, the inlet of the dissolving tank 3 is connected to the outlet of the transport pipe 21. The urea particles in the transport pipe 21 are transported to the dissolving tank 3 through the transport pipe 21, so that the urea particles dissolve in the deionized water in the dissolving tank 3 to form a urea solution.

[0030] The urea solution preparation system 100 of the present invention includes a first storage tank 1, a transport component 2 and a dissolving tank 3. Urea particles in the first storage tank 1 are transported to the dissolving tank 3 by compressed air. The transport efficiency is high, manpower is saved, and transport costs are reduced, thereby reducing the preparation cost of the urea solution preparation system 100.

[0031] In some embodiments, the urea solution preparation system 100 further includes a stirring assembly 31, a first heating assembly 32, and an exhaust assembly 11.

[0032] The stirring assembly 31 is rotatably disposed inside the dissolving tank 3 so as to stir the urea solution inside the dissolving tank 3. Specifically, the stirring assembly 31 can be a stirring blade and is rotatably disposed inside the dissolving tank 3. The stirring assembly 31 is located at the center of the bottom of the dissolving tank 3. The stirring assembly 31 is driven by a motor to rotate inside the dissolving tank 3 to ensure that the urea particles are fully dissolved.

[0033] The first heating element 32 is located inside the dissolving tank 3 and at the bottom of the dissolving tank 3. When the temperature of the dissolving tank 3 is lower than a first preset value, the first heating element 32 is used to dissolve the urea solution in the dissolving tank 3. Specifically, the first heating element 32 is a steam coil or an electric heating element and is located at the bottom of the dissolving tank 3. Since urea dissolution is an endothermic process, the first heating element 32 needs to be activated to heat the solution temperature in the dissolving tank 3 to about 50°C. When the ambient temperature is too low, the first heating element 32 needs to be activated to raise the solution temperature above 28°C, thereby preventing the urea solution from crystallizing.

[0034] An exhaust assembly 11 is installed on the first storage tank 1 and located at the top of the first storage tank 1 to exhaust air from the first storage tank 1. Specifically, the exhaust assembly 11 is an axial flow fan or exhaust fan installed at the top of the first storage tank 1 and connected to the outside through a pipe, so as to exhaust air from the first storage tank 1 through the exhaust assembly 11 to prevent urea particles from absorbing moisture and clumping.

[0035] In some embodiments, the urea solution preparation system 100 further includes a second storage tank 8, which is located on one side of and communicates with the dissolving tank 3, so that the urea solution in the dissolving tank 3 flows into the second storage tank 8 for storage. Specifically, as shown in FIG1, the second storage tank 8 is located downstream of the dissolving tank 3, and the inlet of the second storage tank 8 is communicated with the outlet of the dissolving tank 3, so that the urea solution dissolved in the dissolving tank 3 flows into the second storage tank 8 and the urea solution is stored through the storage tank 4.

[0036] In some embodiments, the urea solution preparation system 100 further includes a connecting pipe 5, the two ends of which are connected to a dissolving tank 3 and a second storage tank 8, respectively, so that the urea solution in the dissolving tank 3 flows into the second storage tank 8 through the connecting pipe 5. Specifically, as shown in FIG1, the inlet of the connecting pipe 5 is connected to the outlet of the dissolving tank 3, and the outlet of the connecting pipe 5 is connected to the inlet of the second storage tank 8, thereby allowing the urea solution in the urea solution to flow into the second storage tank 8 through the connecting pipe 5 for storage.

[0037] In some embodiments, the urea solution preparation system 100 further includes a third heating component 6, which surrounds the outer periphery of the connecting pipe 5 to heat the urea solution within the connecting pipe 5. Specifically, as shown in FIG1, the third heating component 6 is a steam coil or an electric heating element, and the second heating component surrounds the outer periphery of the connecting pipe 5, thereby heating the connecting pipe 5 to prevent crystallization of the urea solution during transport.

[0038] In some embodiments, the urea solution preparation system 100 further includes a second heating component disposed at the bottom of the second storage tank 8. When the temperature inside the second storage tank 8 is lower than a preset value, the second heating component heats the urea solution inside the second storage tank 8. Specifically, the second heating component is a steam coil or an electric heating element and is disposed at the bottom of the second storage tank 8 to heat the urea solution inside the second storage tank 8, preventing the urea solution from crystallizing during storage.

[0039] In some embodiments, the urea solution preparation system 100 further includes a base with a height of not less than 100 mm, and a first storage tank 1 is disposed on the base. Specifically, the base can be made of cast concrete, with a height of not less than 100 mm, to ensure that the first storage tank 1 is kept away from ground moisture and to prevent ground moisture from affecting the storage of urea particles.

[0040] In some embodiments, the urea solution preparation system 100 further includes a temperature sensor, a liquid level sensor, and a density sensor.

[0041] A temperature sensor is installed inside the dissolving tank 3 to detect the temperature inside the tank. When the temperature inside the dissolving tank 3 falls below a preset value, the first heating component 32 is activated to heat the urea solution. Thus, by detecting the temperature inside the dissolving tank 3 using the temperature sensor, crystallization of the urea solution is prevented.

[0042] A liquid level sensor is installed inside the dissolving tank 3 to detect the urea solution inside. Therefore, by detecting the liquid level in the dissolving tank 3, when the liquid level is low, water and urea granules can be added to the dissolving tank 3 to ensure that the liquid level is within the normal range.

[0043] A density sensor is installed inside the dissolving tank 3 to detect the density of the urea solution within it. Thus, the concentration of the urea solution is determined by detecting the density of the urea solution.

[0044] In some embodiments, the urea solution preparation system 100 further includes a circulation pump 7, which is located on one side of the dissolving tank 3. One end of the circulation pump 7 is connected to the bottom of the dissolving tank 3 so that the urea solution in the dissolving tank 3 flows into the circulation pump 7, and the other end of the circulation pump 7 is connected to the top of the dissolving tank 3 so that the urea in the circulation pump 7 flows into the dissolving tank 3. Specifically, as shown in FIG1, the inlet of the circulation pump 7 is connected to the bottom of the dissolving tank 3, and the outlet of the circulation pump 7 is connected to the top of the dissolving tank 3, thereby circulating the urea solution through the circulation pump 7 to improve the dissolution efficiency of urea particles and reduce the dissolution time of urea.

[0045] In some embodiments, the transport assembly 2 further includes a lifting member disposed within the first storage tank 1. One end of the lifting member is located at the bottom of the first storage tank 1, and the other end of the lifting member engages with the transport pipe 21, so that the urea granules in the first storage tank 1 are transported to the transport pipe 21 via the lifting member. Specifically, as shown in FIG1, the lifting member can be a chain elevator, and the chain elevator is disposed within the first storage tank 1 to transport the urea granules in the first storage tank 1 to the transport pipe 21. The lifting member can continuously lift the urea granules from the storage tank 4 to the transport pipe 21, ensuring the continuity and stability of the entire transport process.

[0046] In some embodiments, the urea solution preparation system 100 further includes a water storage tank 9, which stores deionized water and is connected to the dissolving tank 3, thereby providing deionized water to the dissolving tank 3.

[0047] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or component 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 this invention.

[0048] 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 technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0049] In this 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 connection that allows communication between components; 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, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0050] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0051] In this invention, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0052] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A urea solution preparation system, characterized in that, include: The first storage tank is used to store urea granules; A transport assembly includes a transport pipe and a compressor. The transport pipe is connected to the first storage tank so that urea particles in the first storage tank flow into the transport pipe. The compressor is used to generate compressed air and is connected to the transport pipe so that the compressed air flows into the transport pipe to transport the urea particles. A dissolving tank is connected to the transport pipe so that urea particles in the transport pipe flow into the dissolving tank to dissolve the urea particles into a urea solution.

2. The urea solution preparation system according to claim 1, characterized in that, Also includes: A stirring assembly is rotatably disposed inside the dissolving tank so that the stirring assembly stirs the urea solution inside the dissolving tank; A first heating component is disposed inside the dissolving tank and located at the bottom of the dissolving tank, so that when the temperature of the dissolving tank is lower than a first preset value, the first heating component is used for the urea solution inside the dissolving tank. An exhaust assembly is provided on the first storage tank and located on top of the first storage tank to exhaust air from the first storage tank.

3. The urea solution preparation system according to claim 1, characterized in that, It also includes a second storage tank, which is located on one side of the dissolving tank and communicates with the dissolving tank so that the urea solution in the dissolving tank flows into the second storage tank for storage.

4. The urea solution preparation system according to claim 3, characterized in that, It also includes a connecting pipe, the two ends of which are connected to the dissolving tank and the second storage tank, respectively, so that the urea solution in the dissolving tank flows into the second storage tank through the connecting pipe.

5. The urea solution preparation system according to claim 4, characterized in that, It also includes a third heating component surrounding the outer periphery of the connecting pipe, so that the third heating component heats the urea solution inside the connecting pipe.

6. The urea solution preparation system according to claim 2, characterized in that, Also includes: A temperature sensor is installed inside the dissolving tank to detect the temperature inside the dissolving tank, so that when the temperature inside the dissolving tank is lower than a preset value, the first heating component is turned on to heat the urea solution. A liquid level sensor is installed inside the dissolving tank and is used to detect the urea solution inside the dissolving tank. A density sensor is installed inside the dissolving tank and is used to detect the density of the urea solution inside the dissolving tank.

7. The urea solution preparation system according to claim 1, characterized in that, It also includes a circulation pump, which is located on one side of the dissolving tank, with one end of the circulation pump connected to the bottom of the dissolving tank so that the urea solution in the dissolving tank flows into the circulation pump, and the other end of the circulation pump connected to the top of the dissolving tank so that the urea pumped by the circulation pump flows into the dissolving tank.

8. The urea solution preparation system according to claim 3, characterized in that, It also includes a second heating component, which is located at the bottom of the second storage tank. When the temperature inside the second storage tank is lower than a preset value, the second heating component heats the urea solution inside the second storage tank.

9. The urea solution preparation system according to claim 1, characterized in that, It also includes a base, the height of which is not less than 100mm, and the first storage tank is disposed on the base.

10. The urea solution preparation system according to claim 1, characterized in that, The transport assembly also includes a lifting member disposed inside the first storage tank. One end of the lifting member is located at the bottom of the first storage tank, and the other end of the lifting member cooperates with the transport pipe so that the urea particles in the first storage tank are transported to the transport pipe through the lifting member.