Potassium nitrate production device

Abstract

The utility model belongs to chemical equipment technical field discloses a kind of potassium nitrate production device, including the reaction kettle with stirring device and heating jacket, reaction kettle is sequentially communicated to crystallizing kettle, centrifuge by pipeline, pump and valve, and centrifuge is equipped with solid material outlet and mother liquor outlet, and the solid material outlet of centrifuge is sequentially communicated to first drying device and packing machine by pipeline, and the mother liquor outlet of centrifuge is communicated to concentration device by pipeline, pump and valve, and concentration device is respectively communicated to second drying device and spray drying tower. The utility model can produce potassium nitrate, and potassium chloride and magnesium chloride in mother liquor can be separated, extracted and reused, with simple structure, good separation effect and significantly improved economic benefit.

Description

Technical Field

[0001] This utility model belongs to the field of chemical equipment technology, specifically relating to a potassium nitrate production device. Background Technology

[0002] Potassium nitrate is an important chemical raw material, widely used in industrial production in food, pharmaceuticals, glass, ceramics, and explosives, as well as as a fertilizer in agriculture. Currently, the main method for producing potassium nitrate in China is the metathesis process. This process typically uses ammonium nitrate or magnesium nitrate as raw materials to provide nitrate ions. However, when magnesium nitrate is used to react with potassium chloride to produce potassium nitrate, the resulting mother liquor contains large amounts of potassium chloride and magnesium chloride. If these components cannot be effectively separated and extracted, it will result in significant waste. Therefore, it is necessary to extract and reuse these components from the mother liquor to maximize economic benefits. Summary of the Invention

[0003] The technical problem to be solved by this utility model is to provide a potassium nitrate production device that, in addition to producing potassium nitrate, can also separate, extract and reuse potassium chloride and magnesium chloride in the mother liquor. It has a simple structure, good separation effect, and significantly improves economic benefits.

[0004] To solve the above-mentioned technical problems, the technical solution of this utility model is as follows:

[0005] A potassium nitrate production apparatus includes a reactor equipped with a stirring device and a heating jacket. The reactor is connected in sequence to a crystallization vessel and a centrifuge via pipes, pumps, and valves (the outlet of the reactor is connected to the inlet of the crystallization vessel, and the outlet of the crystallization vessel is connected to the inlet of the centrifuge). The centrifuge has a solid material outlet and a mother liquor outlet. The solid material outlet of the centrifuge is connected in sequence to a first drying device and a packaging machine via pipes (the solid material outlet of the centrifuge is connected to the inlet of the first drying device, and the outlet of the first drying device is connected to the inlet of the packaging machine). The mother liquor outlet of the centrifuge is connected to the inlet of a concentration device via pipes, pumps, and valves. The outlet of the concentration device is connected to the inlet of a second drying device and the inlet of a spray drying tower.

[0006] Preferably, the reactor is an enamel-lined reactor, model F15000L, manufactured by Jiangsu Yangyang Chemical Equipment Manufacturing Co., Ltd.

[0007] Preferably, the crystallization vessel is a vacuum crystallizer, model OSLO-10, manufactured by Suzhou Qiaofa Environmental Protection Technology Co., Ltd.

[0008] Preferably, the centrifuge model is PG-800, manufactured by Shanghai Centrifuge Machinery Research Institute Co., Ltd.

[0009] Preferably, both the first and second drying devices are vibrating fluidized bed dryers, model FG-100, manufactured by Changzhou Xianfeng Drying Equipment Co., Ltd.

[0010] Preferably, the concentration device is a triple-effect evaporator, model EV-3-5000, manufactured by Surida Environmental Protection Technology Co., Ltd.

[0011] Preferably, the spray drying tower is model LPG-150, manufactured by Wuxi Sunshine Drying Equipment Co., Ltd.

[0012] Preferably, both the second drying device and the spray drying tower are connected to the packaging machine.

[0013] Preferably, the packaging machine is an automatic packaging machine, model DCS-50, manufactured by Henan Hongyuan Yuzhen General Machinery Co., Ltd.

[0014] Due to the adoption of the above technical solution, the beneficial effects of this utility model are:

[0015] This invention involves reacting magnesium nitrate and potassium chloride in a reaction vessel to produce potassium nitrate and magnesium chloride, with a small amount of unreacted potassium chloride remaining. After separating the potassium nitrate in a crystallization vessel, the mother liquor mainly contains magnesium chloride and potassium chloride. This mother liquor is then concentrated until the solid content reaches 40%, at which point potassium chloride precipitates. The mother liquor after potassium chloride precipitation is further concentrated until the solid content exceeds 45%, and then spray-dried to obtain magnesium chloride. This method allows for the sequential separation of potassium nitrate, potassium chloride, and magnesium chloride from the reactants, enabling them to be sold as products and increasing business profits.

[0016] In summary, in addition to producing potassium nitrate, this invention can also separate and extract potassium chloride and magnesium chloride from the mother liquor for reuse. It has a simple structure, good separation effect, and significantly improves economic benefits. Attached Figure Description

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0018] Figure 1 This is a structural schematic diagram of an embodiment of the present utility model;

[0019] The components include: 1. Reactor; 2. Crystallizer; 3. Centrifuge; 4. First drying device; 5. Packaging machine; 6. Concentration device; 7. Second drying device; and 8. Spray drying tower. Detailed Implementation

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0021] like Figure 1As shown, this utility model is a potassium nitrate production device, including a reaction vessel 1 equipped with a stirring device (not shown) and a heating jacket (not shown). The reaction vessel 1 is connected to a crystallization vessel 2 and a centrifuge 3 in sequence through pipes (not shown), pumps (not shown) and valves (not shown). The centrifuge 3 is equipped with a solid material outlet and a mother liquor outlet. The solid material outlet of the centrifuge 3 is connected to a first drying device 4 and a packaging machine 5 in sequence through pipes. The mother liquor outlet of the centrifuge 3 is connected to a concentration device 6 through pipes, pumps and valves. The concentration device 6 is connected to a second drying device 7 and a spray drying tower 8. Both the second drying device 7 and the spray drying tower 8 are connected to the packaging machine 5.

[0022] In actual production, potassium chloride and magnesium nitrate are loaded into a reaction vessel at a molar ratio of 2:1 and prepared into a saturated solution at 50-60℃ and a stirring speed of 60-80 rpm. After complete dissolution, the material is transported to a crystallization vessel for slow cooling and crystallization at a cooling rate of less than 3℃ / h. When the temperature drops to 10-15℃, it is kept constant until potassium nitrate is fully crystallized. Then, the potassium nitrate crystals are separated by a centrifuge and dried in the first drying device 4 before being packaged and stored. The mother liquor obtained by centrifugation is concentrated in a concentration device 6. When the solid content is concentrated to 40%, potassium chloride in the mother liquor will crystallize out at 80-90℃. The concentration is continued until the solid content is greater than 45%, at which point potassium chloride will completely precipitate out. The mother liquor is then transported to a spray drying tower 8 for drying to obtain magnesium chloride. The precipitated potassium chloride is then dried in a second drying device 7. The dried magnesium chloride and potassium chloride are then transported to a packaging machine 5 for packaging.

[0023] It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of the present invention. Furthermore, it should be understood that after reading the teachings of this invention, those skilled in the art can make various alterations or modifications to the invention, and these equivalent forms also fall within the scope defined by the appended claims.

Claims

1. A potassium nitrate production apparatus, characterized in that: The apparatus includes a reaction vessel equipped with a stirring device and a heating jacket. The reaction vessel is connected in sequence to a crystallization vessel and a centrifuge via pipes, pumps, and valves. The centrifuge has a solid material outlet and a mother liquor outlet. The solid material outlet of the centrifuge is connected in sequence to a first drying device and a packaging machine via pipes. The mother liquor outlet of the centrifuge is connected to a concentration device via pipes, pumps, and valves. The concentration device is connected to a second drying device and a spray drying tower.

2. The potassium nitrate production apparatus as described in claim 1, characterized in that: The reactor is an enamel-lined reactor.

3. The potassium nitrate production apparatus as described in claim 1, characterized in that: The crystallization vessel is a vacuum crystallizer.

4. The potassium nitrate production apparatus as described in claim 1, characterized in that: Both the first drying device and the second drying device are vibrating fluidized bed dryers.

5. The potassium nitrate production apparatus as described in claim 1, characterized in that: The concentration device is a triple-effect evaporator.

6. The potassium nitrate production apparatus as described in claim 1, characterized in that: The second drying device and the spray drying tower are both connected to the packaging machine.

7. The potassium nitrate production apparatus as described in claim 1, characterized in that: The packaging machine is an automatic packaging machine.

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