Environment-friendly nitric acid purifying and refining device and method thereof

A nitric acid, environmental protection technology, applied in the field of nitric acid purification, can solve the problems of poor purification effect and unsafe purification process, and achieve the effect of thorough purification and safety guarantee

Inactive Publication Date: 2016-09-14
TIANJIN CITY PO MOIST CHEM
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Problems solved by technology

[0005] The object of the present invention is to provide an environment-friendly nitric acid purification and purification de...
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Method used

The benefit of the present invention is: nitrogen monoxide probe and nitrogen dioxide probe are installed in device, operator can regulate and control the operation of whole device by microcontroller, avoids that big pressure difference causes danger; In compressed air The first air diffuser and the second air diffu...
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Abstract

The invention discloses an environment-friendly nitric acid purifying and refining device and a method thereof. The device comprises a reactor. The external wall of the reactor is provided with a cooling jacket. The upper end of the reactor is provided with a compressed air inlet pipe. The compressed air inlet pipe vertically penetrates the upper end of the reactor and stretch to the bottom of the reactor. A purification tank is arranged in the middle position in the reactor. One end of the purification tank is fixed on the internal wall of the reactor. The section, which is in the purification tank, of the compressed air inlet pipe is provided with a first air distribution disc. The section, which is under the purification tank, of the compressed air inlet pipe is provided with an electromagnetic valve. The tail end, which is under the electromagnetic valve, of the compressed air inlet pipe is provided with a second air distribution disc. The upper end of the reactor is also provided with an air exhaust pipe. The upper end of the air exhaust pipe is provided with a vacuum pump. The tail end of the air exhaust pipe is arranged in a liquid alkali absorption tank. The internal wall of the reactor is provided with a nitrogen monoxide probe and a nitrogen dioxide probe. The nitrogen monoxide probe and the nitrogen dioxide probe are connected to a micro processor. The micro processor is connected to the electromagnet valve. The lower end of the reactor is provided with a liquid discharge pipe. The provided device and method have the advantages that the operation is convenient and safe, and the purifying and refining effect is excellent.

Application Domain

Nitric acid

Technology Topic

Nitrogen monooxideNitrogen dioxide +7

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  • Environment-friendly nitric acid purifying and refining device and method thereof

Examples

  • Experimental program(1)
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Example Embodiment

[0014] The invention provides an environmentally-friendly nitric acid purification and purification device and a method thereof. The operation of the invention is simple and safe, and the purification and purification effect is excellent.
[0015] The following describes the technical solutions in the embodiments of the present invention clearly and in detail with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.
[0016] Such as figure 1 An environmentally friendly nitric acid purification and purification device and method thereof shown include a reactor 1, the outer wall of the reactor 1 is provided with a cooling interlayer 2, and the upper end of the reactor 1 is provided with a compressed air inlet pipe 3, the compressed air The intake pipe 3 is provided with an intake valve 4, the compressed air intake pipe 3 vertically penetrates the upper end of the reactor 1 and extends into the bottom of the reactor 1, and a purification tank is provided in the middle of the reactor 1 5. One end of the purification tank 5 is fixed on the inner wall of the reactor 1, the compressed air intake pipe 3 in the purification tank 5 is provided with a first diffuser 6, and the compressed air is below the purification tank 5. A solenoid valve 7 is provided on the air intake pipe 3, a second diffuser 8 is provided at the end of the compressed air intake pipe 3 below the solenoid valve 7, and a concentrated nitric acid feed pipe 9 is also provided at the upper end of the reactor 1. The concentrated nitric acid feed pipe 9 is provided with a feed valve 10, the upper end of the reactor 1 is also provided with a suction pipe 11, the upper end of the suction pipe 11 is provided with a suction valve 12 and a vacuum pump 13, the suction pipe 11 The end is located in the lye absorption tank 14, which absorbs impurity gas through acid-base reaction. The inner wall of the reactor 1 is provided with a nitric oxide probe 15 and a nitrogen dioxide probe 16, the nitric oxide probe 15 and the nitrogen dioxide probe 16 A microcontroller 17 is connected, the microcontroller 17 is connected to the solenoid valve 7, a discharge pipe 18 is provided at the lower end of the reaction kettle 1, and a discharge valve 19 is provided on the discharge pipe 18. The microcontroller 17 can be a PLC controller. When it is in use, a threshold can be set, and when it detects that the nitric oxide and nitrogen dioxide exceed the standard, the solenoid valve 19 is opened.
[0017] Furthermore, it also includes a filter 20. The compressed air intake pipe 3 at the upper end of the reactor 1 is provided with a filter 20 to prevent impurities from entering the device and affecting the quality of nitric acid.
[0018] Furthermore, it also includes an inclined plate 21, which is located at the lower end of the purification tank 5. The concentrated nitric acid overflows from the purification tank 5 into the reactor 1, and flows down the inclined plate 21 without affecting the normal operation of the solenoid valve 7. use.

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Description & Claims & Application Information

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