Device system for preparing nitric acid and using method of device system

A technology of nitric acid and dust removal system, applied in the direction of nitric acid, nitrogen oxides/oxyacids, etc., can solve the problems of reducing the height of the compressor scale absorption tower, large compressor scale, and high equipment investment, so as to reduce equipment investment and scale. , the effect of volume reduction

Pending Publication Date: 2020-11-27
MEISHAN SHUNYING POWER BATTERY MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is: in the technology that utilizes nitrogen dioxide and water reaction to generate nitric oxide and nitric acid in the prior art, existing because compressor scale is big, absorption tower is higher and causes the equipment investment of whole industrial production to be high, operation To solve the technical problem of high cost, provide a device system for preparing nitric acid and its use method. Using the device system to produce nitric acid can effectively reduce the scale of the compressor and reduce the absorption tower without affecting the output and production speed of nitric acid. Height, reducing equipment investment, thus bringing good economic benefits

Method used

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  • Device system for preparing nitric acid and using method of device system
  • Device system for preparing nitric acid and using method of device system
  • Device system for preparing nitric acid and using method of device system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0062] like figure 1 As shown, a device system for preparing nitric acid includes a steam mixing chamber 1, a cooler assembly, a buffer tank 4, a compressor 5, an absorption tower 6 and a tail gas treatment device in turn; wherein, the cooler assembly includes a primary cooler 2. Secondary cooler 3 ; the tail gas treatment device includes a tail gas heat exchanger 8 and a reactor 9 .

[0063] like figure 1 As shown, the steam mixing chamber 1 is used for receiving nitrate decomposition exhaust gas or NO prepared by ammonia oxidation method 2 2. Mixing reaction is carried out after the water vapor; the steam mixing chamber 1 is provided with a first air inlet 11 and a second air inlet 12, and the first air inlet 11 is used for feeding nitrate decomposition tail gas or ammonia oxidation method prepared NO 2 ; The second air inlet 12 is used to introduce high temperature steam; the steam mixing chamber 1 is provided with a first sprayer 111, the first sprayer 111 is connected ...

Embodiment 2

[0069] like figure 2 As shown, a device system for preparing nitric acid includes a steam mixing chamber 1, a dust removal system 7, a cooler assembly, a buffer tank 4, a compressor 5, an absorption tower 6 and a tail gas treatment device in turn; wherein, the cooler assembly includes The primary cooler 2, the secondary cooler 3; the tail gas treatment device includes a tail gas heat exchanger 8 and a reactor 9, and the tail gas heat exchanger is provided with two channels, which are the third air inlet 81 - the first An air outlet and a fourth air inlet 82 - a second air outlet, the two gas passages are used for heat exchange of different gases.

[0070] like figure 2 As shown, the steam mixing chamber 1 is used for receiving nitrate decomposition exhaust gas or NO prepared by ammonia oxidation method 2 2. Mixing reaction is carried out after the water vapor; the steam mixing chamber 1 is provided with a first air inlet 11 and a second air inlet 12, and the first air inlet ...

Embodiment 3

[0079] The decomposed and dust-collected gas of cobalt nitrate was introduced into the device system of Example 2, wherein the NOX concentration in the decomposed and dust-collected gas of cobalt nitrate was 80%, and the temperature was 180°C. The gas first passes through the steam mixing chamber 1, so that the water content in the mixture rises to 56%, and the temperature rises to 220°C. After that, the exhaust gas is preheated by the exhaust gas heat exchanger 8, and the temperature of the gas after heat exchange drops to 190 ° C. The gas after heat exchange is deeply dedusted by the dust removal system 7. Cooling lowered the temperature below the dew point temperature of nitric acid, which was 67°C. A large amount of 28% condensed dilute nitric acid is obtained, and the gas is cooled again through the secondary cooler 3 to make the temperature drop to 30° C. to obtain another part of dilute nitric acid, and both parts of the condensed dilute nitric acid are injected into th...

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Abstract

The invention relates to a device system for preparing nitric acid and a use method of the device system. The device system comprises a steam mixing chamber, a cooler assembly, a buffer tank, a compressor, an absorption tower and a tail gas treatment device which are connected in sequence; the steam mixing chamber is used for receiving nitrate decomposition tail gas or NO2 prepared by an ammonia oxidation method, and water vapor and then carrying out a mixing reaction; the cooler assembly is used for receiving mixed gas discharged from the steam mixing chamber and cooling the mixed gas to obtain condensed acid; the mixed gas sequentially passes through the buffer tank, the compressor and the absorption tower. When the device system is adopted to produce nitric acid, with the yield and thegeneration speed of the nitric acid not influenced, the scale of the compressor can be effectively reduced, the height of the absorption tower can be reduced, the equipment investment can be reduced,and therefore, good economic benefits are brought about.

Description

technical field [0001] The invention relates to the technical field of inorganic chemical resource recovery and treatment, in particular to a device system for preparing nitric acid and a method for using the same. Background technique [0002] Nitrate will be decomposed by heat. When the activity of nitrate metal cation element is between Mg and Cu, nitrate will be decomposed by heat to generate metal oxide, nitrogen dioxide and oxygen; when the activity order of metal is smaller than that of Cu, nitrate will be decomposed by heat. Thermally decomposed into metal elements, nitrogen dioxide and oxygen. The thermal decomposition of metal salts can prepare metal oxides with different crystal forms, different activities and different phases by controlling the temperature. Therefore, the decomposition of nitrate to prepare metal oxides has been sought after by many researchers. [0003] However, the nitrogen oxide gas produced by the decomposition is highly irritating and is o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B21/40
CPCC01B21/40
Inventor 赵林但勇赵顶赵澎金长浩高波
Owner MEISHAN SHUNYING POWER BATTERY MATERIALS CO LTD
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