A production system of potassium nitrate granules

Abstract

The utility model belongs to the technical field of potassium nitrate granule production, provide a kind of production system of potassium nitrate granule.The production system, including granulating system;Granulating system includes fluidized drying bed, first screening machine, pneumatic conveyer, cyclone separator, extrusion granulator, second screening machine, hopper and packing machine connected in turn and can communicate.The production process uses the above production system to carry out potassium nitrate granule production.The production system is built using existing equipment on potassium nitrate production line, and the equipment investment is less, and the process flow is short, and the operation is simple, and it is not necessary to build another production line.The prepared potassium nitrate granule is regular granular in appearance, and the granule strength is moderate, and there is no powdering in storage and transportation process.

Description

Technical Field

[0001] This utility model belongs to the field of potassium nitrate granule production technology, specifically, it relates to a potassium nitrate granule production system. Background Technology

[0002] Potassium nitrate, as an important inorganic chemical product, is widely used in agriculture, chemical industry, military industry, food and other fields. In agriculture, potassium nitrate is a highly efficient nitrogen-potassium compound fertilizer with high nutrient content and good water solubility, providing sufficient nitrogen and potassium elements for crop growth and effectively improving crop yield and quality. In industry, potassium nitrate can be used as an oxidant and catalyst, playing a key role in industries such as fireworks manufacturing and glass production.

[0003] With the increasing demands for quality and form of potassium nitrate products across various industries, granular potassium nitrate is experiencing growing market demand due to its advantages such as good flowability, resistance to clumping, and ease of storage and transportation. Currently, the main industrial granulation methods for producing granular potassium nitrate include melt granulation, spray granulation, and crystallization granulation.

[0004] Melt granulation involves heating potassium nitrate crystals to a molten state and then using specialized granulation equipment to form granules. While this method can produce relatively uniform granules, it requires a large amount of energy to melt and heat the potassium nitrate crystals, increasing production costs and posing safety hazards such as potassium nitrate decomposition due to high temperatures.

[0005] Spray granulation involves spraying a potassium nitrate solution into a drying tower via an atomizing device. The solvent evaporates under the influence of hot air, forming granules. This method requires high concentrations of potassium nitrate solution and precise atomization, and also consumes significant energy for heating and drying the solution. Furthermore, it may generate considerable dust during production, causing some environmental impact.

[0006] Crystallization granulation involves controlling the crystallization conditions of a potassium nitrate solution to allow crystals to gradually grow into granules. However, this method has a long production cycle, the size and morphology of the granules are difficult to control precisely, and the product quality stability is poor, making it difficult to meet the needs of large-scale industrial production.

[0007] Furthermore, most existing potassium nitrate granule production processes require separate production lines, which are disconnected from the potassium nitrate crystal production process. After potassium nitrate crystals are produced, they need to go through cooling, storage, and transportation before entering the granulation process. This not only increases the number of production steps and costs but also causes the temperature of the crystalline potassium nitrate to drop. If a granulation method that requires heating is subsequently used, energy must be consumed again for reheating, resulting in energy waste.

[0008] Therefore, developing a granulation production process that eliminates the need for melting and heating crystalline potassium nitrate, and is energy-efficient and cost-effective, has become an urgent problem for the potassium nitrate industry. Utility Model Content

[0009] To address the aforementioned shortcomings of existing technologies, the present invention aims to provide a potassium nitrate granule production system. This system utilizes existing equipment from a potassium nitrate production line, requiring minimal equipment investment, featuring a short process flow, simple operation, and eliminating the need for constructing a separate production line. The resulting potassium nitrate granules are regularly shaped with moderate strength and do not pulverize during storage and transportation.

[0010] To achieve the above objectives, the solution adopted by this utility model is:

[0011] A potassium nitrate granule production system includes a granulation system; the granulation system includes a fluidized bed dryer, a first screening machine, a pneumatic conveyor, a cyclone separator, an extrusion granulator, a second screening machine, a hopper, and a packaging machine that are connected in sequence and can be communicated.

[0012] Furthermore, in a preferred embodiment of the present invention, the second screening machine has a first discharge port and a second discharge port; the first discharge port is connected and communicates with the feed end of the hopper, and the second discharge port is connected and communicates with the pneumatic conveyor.

[0013] Furthermore, in a preferred embodiment of the present invention, the granulation system further includes a return screw conveyor; the feed end of the return screw conveyor is connected and communicates with the second discharge port, and the discharge end of the return screw conveyor is connected and communicates with the feed end of the pneumatic conveyor.

[0014] Furthermore, in a preferred embodiment of the present invention, the granulation system further includes a discharge screw conveyor; the feed end of the discharge screw conveyor is connected and communicates with the discharge end of the cyclone separator, and the discharge end of the discharge screw conveyor is connected and communicates with the feed end of the extrusion granulator.

[0015] Furthermore, in a preferred embodiment of the present invention, a dust removal system is also included; the dust removal system includes a bag filter and an induced draft fan connected to each other; the induced draft fan is connected and communicates with the top of the pneumatic conveyor.

[0016] The beneficial effects of the potassium nitrate granule production system provided by this utility model are:

[0017] The potassium nitrate granule production system provided by this utility model includes a granulation system. Based on the design of the connection method between the various devices in the granulation system, the resulting production system can granulate potassium nitrate granules without melting, requiring less equipment investment, a shorter process flow, and simpler operation, eliminating the need for a separate production line. The prepared potassium nitrate granules have a regular granular appearance, moderate particle strength, and do not pulverize during storage and transportation. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the potassium nitrate granule production system provided in Experimental Example 1 of this utility model.

[0019] Icons: 10-Potassium nitrate granule production system, 100-Granulation system, 200-Dust removal system, 110-Fluidized bed dryer, 120-First screening machine, 130-Pneumatic conveyor, 140-Cyclone separator, 150-Extrusion granulator, 160-Second screening machine, 170-Hopper, 180-Packaging machine, 101-Return screw conveyor, 102-Discharge screw conveyor, 210-Bag dust collector, 220-Exhaust fan. Detailed Implementation

[0020] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiment 1 is a part of the embodiments of the present invention, but not all of them. The components of the embodiments of the present invention described and shown in the accompanying drawings can be arranged and designed in various different configurations.

[0021] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0022] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0023] Example 1

[0024] This embodiment provides a potassium nitrate granule production system 10, such as... Figure 1 As shown, it includes a granulation system 100 and a dust removal system 200.

[0025] The granulation system 100 includes a fluidized bed 110, a first screening machine 120, a pneumatic conveyor 130, a cyclone separator 140, an extrusion granulator 150, a second screening machine 160, a hopper 170, and a packaging machine 180, which are connected in sequence and can be communicated with each other, as well as a return screw conveyor 101 and a discharge screw conveyor 102.

[0026] In this embodiment, the models of the above-mentioned equipment may include, but are not limited to: fluidized bed dryer 110 (Sichuan Wangchang Drying Equipment Co., Ltd., 900 / 8000), first screening machine 120 (Xingyang Shengjie Machinery Manufacturing Plant, GS1030), pneumatic conveyor 130 (Qufu Keda Machinery Equipment Co., Ltd., QL-3), cyclone separator 140 (Jinan Xufeng Environmental Protection Machinery Equipment Co., Ltd., XFXF-300), and second screening machine 16. 0 (Xingyang Shengjie Machinery Manufacturing Plant, GS1030), Packaging Machine 180 (Hunan Hengwei Packaging Machinery Co., Ltd., DK-420A), Return Screw Conveyor 101 (Hengshui Longchang Fertilizer Granulation Machinery Co., Ltd., 300 / 6000), Discharge Screw Conveyor 102 (Hengshui Longchang Fertilizer Granulation Machinery Co., Ltd., 300 / 6000), Extrusion Granulator 150 (Hengshui Longchang Fertilizer Granulation Machinery Co., Ltd., GY220 / 4).

[0027] In this embodiment, the second screening machine 160 has a first discharge port and a second discharge port. The first discharge port is connected and communicates with the feed end of the hopper 170, and the second discharge port is connected and communicates with the pneumatic conveyor 130. The feed end of the return screw conveyor 101 is connected and communicates with the second discharge port, and the discharge end of the return screw conveyor 101 is connected and communicates with the feed end of the pneumatic conveyor 130. The feed end of the discharge screw conveyor 102 is connected and communicates with the discharge end of the cyclone separator 140, and the discharge end of the discharge screw conveyor 102 is connected and communicates with the feed end of the extrusion granulator 150.

[0028] In this embodiment, the dust removal system 200 includes a bag filter 210 and an induced draft fan 220 connected to each other; the induced draft fan 220 is connected and communicates with the top of the pneumatic conveyor 130.

[0029] It should be noted that, in this embodiment, the connection methods between the devices include: direct connection between the discharge port and the inlet port, or the use of simple technical means in the prior art, such as using a material guiding channel, with both ends of the channel connected to the discharge port and the inlet port of the adjacent device respectively to play a transmission role, so as to realize the transfer of materials between the devices.

[0030] The front-to-back, near-to-far, and high-to-low positions of each piece of equipment are adjusted according to the actual situation. If a high position is required, a suitable support frame from the existing technology is used to erect it so as to achieve the material conveying effect of this application.

[0031] In addition, if power devices such as pumps are required between adjacent installations during the material conveying process, they can be added as needed.

[0032] The potassium nitrate granule production system 10 provided in this embodiment is used as follows: Dehydrated potassium nitrate is dried in a fluidized bed dryer 110, then screened in a first screening machine 120 to obtain powder. The powder is conveyed by a pneumatic conveyor 130 into a cyclone separator 140. The powder passes through the discharge end of the cyclone separator 140 into a discharge screw conveyor 102, and is then conveyed by the discharge screw conveyor 102 into an extrusion granulator 150. The hot air in the cyclone separator 140 is drawn out by an induced draft fan 220 and discharged after dust removal by a bag filter 210. The material obtained after granulation in the extrusion granulator 150 enters a second screening machine 160 for screening. Qualified granules pass through the first discharge port into a hopper 170 and are packaged and discharged by a packaging machine 180. Unqualified granules pass through the second discharge port and are returned to the feed end of the pneumatic conveyor 130 by a return screw conveyor 101 for continued granulation.

[0033] In summary, the potassium nitrate granule production system 10 provided by this invention utilizes existing equipment on a potassium nitrate production line, resulting in low equipment investment, a short process flow, and simple operation, eliminating the need for constructing a separate production line. The prepared potassium nitrate granules have a regular granular appearance, moderate particle strength, and do not pulverize during storage and transportation.

[0034] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A potassium nitrate granule production system, characterized in that: It includes a granulation system; the granulation system includes a fluidized bed, a first screening machine, a pneumatic conveyor, a cyclone separator, an extrusion granulator, a second screening machine, a hopper, and a packaging machine that are connected in sequence and can be communicated.

2. The potassium nitrate granule production system according to claim 1, characterized in that: The second screening machine has a first discharge port and a second discharge port; the first discharge port is connected and communicates with the feed end of the hopper, and the second discharge port is connected and communicates with the pneumatic conveyor.

3. The potassium nitrate granule production system according to claim 2, characterized in that: The granulation system also includes a return screw conveyor; the feed end of the return screw conveyor is connected and communicates with the second discharge port, and the discharge end of the return screw conveyor is connected and communicates with the feed end of the pneumatic conveyor.

4. The potassium nitrate granule production system according to claim 3, characterized in that: The granulation system also includes a discharge screw conveyor; the feed end of the discharge screw conveyor is connected and communicates with the discharge end of the cyclone separator, and the discharge end of the discharge screw conveyor is connected and communicates with the feed end of the extrusion granulator.

5. The potassium nitrate granule production system according to claim 4, characterized in that: It also includes a dust removal system; the dust removal system includes a bag filter and an induced draft fan connected to each other; the induced draft fan is connected and communicates with the top of the pneumatic conveyor.

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