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Vanadium extraction wastewater ammonia nitrogen resource recycling technology

A recycling and waste water technology, applied in the direction of metallurgical waste water treatment, water pollutants, multi-stage water treatment, etc., can solve problems such as difficulty in reducing ammonia nitrogen content, poor deamination effect, and failure to meet the requirements of ammonia nitrogen content, and achieve deamination The effect of increasing the effect and prolonging the deamination time

Inactive Publication Date: 2019-09-27
四川聚力金属制品有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Aiming at the deficiencies of the prior art, the present invention provides a recycling technology for recycling ammonia nitrogen in vanadium-extracting wastewater, which has the advantages of good deammonization effect, and solves the problem that the ammonia nitrogen content in wastewater from vanadium-titanium products factories is about 6500mg / l, which cannot meet the national promulgated The requirements for ammonia nitrogen content in the "Vadium Industry Pollutant Emission Standards", but the existing deammonization equipment has poor deammonization effect, which makes it difficult to reduce the ammonia nitrogen content and cannot be controlled within the standard range. At the same time, after the deammonization is completed, a large amount The deposits have affected the equipment and process operation, leading to the problem of poor production operation

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  • Vanadium extraction wastewater ammonia nitrogen resource recycling technology

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Effect test

Embodiment 1

[0025] Embodiment 1: Ammonia nitrogen resource recovery technology for vanadium extraction wastewater, comprising the following steps:

[0026] 1) Flue gas heat exchange: the ammonia nitrogen wastewater after chromium removal and the high-temperature flue gas from the rotary kiln exchange heat in the tubular heat exchanger and then enter the deammonization raw water tank;

[0027] 2) Deamination:

[0028] ① Add a small amount of scale inhibitor and dispersant to the raw water tank for deamination;

[0029] ②Use the pump to lift the ammonia nitrogen wastewater into the pipeline mixer and add alkali online to adjust the pH value.

[0030] ③ Send the ammonia nitrogen waste water with PH adjustment to the inside of the preheater, and the preheating medium is the high temperature waste water discharged from the tower kettle after deamination;

[0031] ④The preheated ammonia-nitrogen wastewater is sent to the deamination section of the combined tower, and flows downward step by st...

Embodiment 2

[0037] Embodiment 2: Ammonia nitrogen resource recovery technology for vanadium extraction wastewater, comprising the following steps:

[0038] 1) Flue gas heat exchange: the ammonia nitrogen wastewater after chromium removal and the high-temperature flue gas from the rotary kiln exchange heat in the tubular heat exchanger and then enter the deammonization raw water tank;

[0039] 2) Deamination:

[0040] ① Add a small amount of scale inhibitor and dispersant to the raw water tank for deamination;

[0041] ②Use the pump to lift the ammonia nitrogen wastewater into the pipeline mixer and add alkali online to adjust the pH value.

[0042] ③ Send the ammonia nitrogen waste water with PH adjustment to the inside of the preheater, and the preheating medium is the high temperature waste water discharged from the tower kettle after deamination;

[0043] ④The preheated ammonia-nitrogen wastewater is sent to the deamination section of the combined tower, and flows downward step by st...

Embodiment 3

[0049] Embodiment 3: Ammonia nitrogen resource recovery technology for vanadium extraction wastewater, comprising the following steps:

[0050] 1) Flue gas heat exchange: the ammonia nitrogen wastewater after chromium removal and the high-temperature flue gas from the rotary kiln exchange heat in the tubular heat exchanger and then enter the deammonization raw water tank;

[0051] 2) Deamination:

[0052] ① Add a small amount of scale inhibitor and dispersant to the raw water tank for deamination;

[0053] ②Use the pump to lift the ammonia nitrogen wastewater into the pipeline mixer and add alkali online to adjust the pH value.

[0054] ③ Send the ammonia nitrogen waste water with PH adjustment to the inside of the preheater, and the preheating medium is the high temperature waste water discharged from the tower kettle after deamination;

[0055] ④The preheated ammonia-nitrogen wastewater is sent to the deamination section of the combined tower, and flows downward step by st...

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Abstract

The invention relates to the technical field of vanadium extraction wastewater treatment, and discloses a vanadium extraction wastewater ammonia nitrogen resource recycling technology. The technology comprises the following step of exhaust gas heat exchange, wherein ammonia nitrogen wastewater obtained after chromium removal and high-temperature exhaust gas from a rotary kiln are subjected to heat exchange inside a tubular heat exchanger and then enter an ammonia removal raw water tank. According to the vanadium extraction wastewater ammonia nitrogen resource recycling technology, ammonia nitrogen wastewater obtained after chromium removal and high-temperature exhaust gas from a rotary kiln are subjected to heat exchange inside the tubular heat exchanger and then enter the ammonia removal raw water tank, then, a micro dirt dispersion agent is added into the ammonia removal raw water tank, the ammonium removal time is prolonged, by recycling heat in high-temperature gas and reaction heat of sulfuric acid and ammonia gas, the ammonia removal effect is effectively improved, finally, ammonia nitrogen indexes meet the standard requirement, the ammonia nitrogen content can be controlled within the standard range, meanwhile, the cleaning period can be built under the condition of not affecting production, precipitates can be processed in time, influences caused by equipment and technologic operation are avoided, and normal operation of production is ensured.

Description

technical field [0001] The invention relates to the technical field of vanadium extraction wastewater treatment, in particular to the recovery technology of vanadium extraction wastewater ammonia nitrogen resources. Background technique [0002] Vanadium is a silver-white metal with a high melting point. It is often called a refractory metal together with niobium, tantalum, tungsten and molybdenum. It is malleable, hard, non-magnetic, and has the ability to withstand hydrochloric acid and sulfuric acid. In the process, a large amount of wastewater will be produced, and the vanadium extraction wastewater contains a large amount of ammonia nitrogen, which will pollute the environment, so it is necessary to recycle the ammonia nitrogen in the vanadium extraction wastewater. [0003] The ammonia nitrogen content in the waste water of the vanadium and titanium products factory is about 6500mg / l, which cannot meet the requirements for the ammonia nitrogen content in the "Vadium In...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/10C02F11/122C02F101/16C02F103/16
CPCC02F1/10C02F1/20C02F1/56C02F1/66C02F1/78C02F5/08C02F9/00C02F11/122C02F2101/16C02F2103/16C02F2301/08
Inventor 彭望向明勇汤波陈登平
Owner 四川聚力金属制品有限公司