Nitric acid recycling system

A technology of nitric acid and dilute nitric acid, applied in the directions of nitric acid, nitrogen oxides/oxyacids, etc., can solve the problems of substandard waste liquid, waste of acid resources, pollution of the environment, etc., and achieve full recycling, saving production costs and investment costs. low effect

Inactive Publication Date: 2014-03-05
HEBEI PROVINCE FANSHAN PHOSPHORITE CO LTD
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

[0003] 1. The waste acid after cleaning also has a certain acidity and cleaning effect. Failure to recycle not only wastes acid resources, but also increases the cost of lye neutralization;
[0004] 2. The lye neutralization process is complicated and difficult to control in place, and the discharged waste liquid often does not meet the standard, polluting the environment

Method used

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  • Nitric acid recycling system

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Embodiment Construction

[0027] Such as figure 1 As shown, it consists of dilute nitric acid recovery deposition storage tank 1, stainless steel magnetic pump 2, stainless steel pipeline for conveying and recovery 3, stainless steel filter device 4, concentrated nitric acid automatic liquid replenishment device 5, and electrical automatic control device 6;

[0028] The dilute nitric acid recovery deposition storage box 1 is welded by stainless steel plates, and is provided with an acid return port 101, an acid outlet 102, and an acid outlet 102"; the dilute nitric acid recovery deposition storage tank 1 is provided with four return partitions area, and at the bottom of each partition area, there are stainless steel ball valve a 103, stainless steel ball valve b 104, stainless steel ball valve c 105, stainless steel ball valve d 106;

[0029] Described stainless steel magnetic force pump 2 is that two stainless steel magnetic force pumps 2 are respectively connected with the acid outlet 102 and the aci...

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Abstract

The invention relates to the recycling of acidic liquid and particularly relates to a nitric acid recycling system. At present, a waste acid solution passing through nitric acid cleaning and ceramic filtering equipment still has certain acidity and is needed to be neutralized by adding an alkaline solution, and then, the waste liquid is discharged. The process has the defects that the resource is wasted, the cost is increased, the process is complex and not easy to control, and the discharged waste liquid can not be up to the standard frequently and pollutes the environment. The system is composed of a dilute nitric acid recovering, depositing and storing tank, a stainless steel magnetic pump device, a stainless steel delivery and recovery pipeline device, a stainless steel filter device, an automatic concentrated nitric acid liquid replenishing device and an automatic electrical control device; the waste acid solution is mixed with 50% nitric acid output by the automatic concentrated nitric acid liquid replenishing device to be up to the concentration of 3-5% after being deposited and filtered, and then, the waste acid solution is utilized.

Description

technical field [0001] The invention relates to the recovery and reuse of acid liquid, in particular to a nitric acid recovery and reuse system. Background technique [0002] In the production of the enterprise, when a filter equipment has been in operation for a period of time, it must be cleaned with dilute nitric acid before it can be put into use again. After cleaning, the waste acid still has a certain acidity, and needs to be neutralized by adding lye, and the neutralized waste is then discharged. There are following problems in this kind of technique: [0003] 1. The waste acid after cleaning also has a certain acidity and cleaning effect. Failure to recycle not only wastes acid resources, but also increases the cost of lye neutralization; [0004] 2. The lye neutralization process is complicated and difficult to control in place, and the discharged waste liquid often does not meet the standard, polluting the environment. Contents of the invention [0005] The pu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B21/46
Inventor 闫库张宝胜杨国华王建洪
Owner HEBEI PROVINCE FANSHAN PHOSPHORITE CO LTD
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