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Method for removing total nitrogen and ammonia nitrogen from blast furnace coal gas washing water

A blast furnace gas and washing water technology, which is applied in chemical instruments and methods, water/sewage treatment, water/sewage multi-stage treatment, etc. And other issues

Inactive Publication Date: 2020-01-03
BEIJING SHOUGANG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Nitrification, electrolytic redox, resin denitrification and molecular sieve adsorption methods are usually used for denitrification of blast furnace gas washing water, and there is a technical problem that the total nitrogen content of the effluent cannot meet the discharge requirements. The method of total nitrogen and ammonia nitrogen in water can significantly reduce the total nitrogen content of denitrification effluent and meet the emission requirements

Method used

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  • Method for removing total nitrogen and ammonia nitrogen from blast furnace coal gas washing water
  • Method for removing total nitrogen and ammonia nitrogen from blast furnace coal gas washing water

Examples

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Effect test

Embodiment 1

[0024] The method for removing total nitrogen and ammonia nitrogen in blast furnace gas washing water provided in this embodiment includes:

[0025] Filtrating blast furnace gas washing water containing total nitrogen and ammonia nitrogen to obtain filtered blast furnace gas washing water;

[0026] The filtered blast furnace gas washing water is subjected to molecular sieve adsorption treatment to obtain blast furnace gas washing water from which total nitrogen and ammonia nitrogen have been removed; the molecular sieve is mainly sodium 13X molecular sieve.

[0027] The filtration is carried out in a multimedia filter.

[0028] The filter material of the multimedia filter includes: pebbles, quartz sand and anthracite.

[0029] The filtering speed of the multimedia filter is 8-10m / h.

[0030] After the molecular sieve is adsorbed and saturated, the sodium chloride solution is used for regeneration to obtain the regenerated molecular sieve and an analysis solution containing t...

Embodiment 2

[0035] The method for removing total nitrogen and ammonia nitrogen in blast furnace gas washing water provided in this embodiment includes:

[0036] Filtrating blast furnace gas washing water containing total nitrogen and ammonia nitrogen to obtain filtered blast furnace gas washing water;

[0037] The filtered blast furnace gas washing water is subjected to molecular sieve adsorption treatment to obtain blast furnace gas washing water from which total nitrogen and ammonia nitrogen are removed; the molecular sieve is a 13X molecular sieve whose main cation is sodium.

[0038] The filtration is carried out in a multimedia filter.

[0039] The filter material of the multimedia filter includes pebbles, quartz sand and anthracite. :.

[0040] The filtering speed of the multimedia filter is 8-10m / h.

[0041] After the molecular sieve is adsorbed and saturated, the sodium chloride solution is used for regeneration to obtain the regenerated molecular sieve and an analysis solution...

Embodiment 3

[0046] The method for removing total nitrogen and ammonia nitrogen in blast furnace gas washing water provided in this embodiment includes:

[0047] Filtrating blast furnace gas washing water containing total nitrogen and ammonia nitrogen to obtain filtered blast furnace gas washing water;

[0048] The filtered blast furnace gas washing water is subjected to molecular sieve adsorption treatment to obtain blast furnace gas washing water from which total nitrogen and ammonia nitrogen are removed; the molecular sieve is a 13X molecular sieve whose main cation is sodium.

[0049] The filtration is carried out in a multimedia filter.

[0050] The filter material of the multimedia filter includes: pebbles, quartz sand and anthracite. .

[0051] The filtering speed of the multimedia filter is 8-10m / h.

[0052] After the molecular sieve is adsorbed and saturated, the sodium chloride solution is used for regeneration to obtain the regenerated molecular sieve and an analysis solution...

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Abstract

The invention relates to a method for removing total nitrogen and ammonia nitrogen from blast furnace coal gas washing water, and belongs to the technical field of wastewater treatment. The method includes the following steps: performing filtration treatment on the blast furnace coal gas washing water containing the total nitrogen and the ammonia nitrogen to obtain filtered blast furnace coal gaswashing water; and performing adsorption treatment on the filtered blast furnace coal gas washing water by using a molecular sieve to obtain blast furnace coal gas washing water without total nitrogenor ammonia nitrogen to meet the discharge requirements, wherein the molecular sieve is a 13X type molecular sieve with a main cation of sodium, after the molecular sieve adsorption is saturated, regeneration is performed by using a 10% sodium chloride solution, the regenerated desorption solution containing high-concentration total nitrogen and ammonia nitrogen is subjected to electroredox by using a platinum electrode (with a ruthenium coating) to remove the total nitrogen and the ammonia nitrogen, and the desorption liquid (the content of total nitrogen is less than 15 mg / l, and the contentof ammonia nitrogen is less than 5 mg / l) treated by electroredox treatment can reach a standard to be discharged.

Description

technical field [0001] The invention belongs to the technical field of wastewater treatment, and in particular relates to a method for removing total nitrogen and ammonia nitrogen in blast furnace gas washing water. Background technique [0002] Blast furnace gas washing water is one of the main industrial wastewater of iron and steel enterprises in my country, which has the characteristics of large water volume, high water temperature and high content of suspended solids. At present, denitrification of blast furnace gas washing wastewater A. adopts microbial nitrification and nitrification method, which takes a long time to process, occupies a large area, and the concentration of effluent wastewater is difficult to reach below 5mg / l. B. The electrolytic redox method is used, but the electrode used is a magnesium electrode, but the concentration of the treated water is relatively high. C. System and method for resin adsorption denitrification and resin regeneration waste li...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/06
CPCC02F1/001C02F1/281C02F1/467C02F9/00C02F2001/425
Inventor 雷仲存曹横亮毛松林王春福黎婵
Owner BEIJING SHOUGANG CO LTD
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