Stripping ammonia-removing method based on flash evaporation and heat pump technologies

A flash steam and deamination technology, which is applied in the field of high-efficiency and energy-saving deamination technology, can solve the problems of high unit consumption of wastewater treatment and large steam consumption, and can solve scaling and blockage, reduce consumption, and ensure saturation. degree of effect

Active Publication Date: 2011-09-21
CHINA PETROLEUM & CHEM CORP +3
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AI Technical Summary

Problems solved by technology

The steam stripping method is suitable for the treatment of high-concentration ammonia-nitrogen wastewater, and the removal rate of ammonia nitrogen can reach more than 99%. The efficiency is very high and the technology is mature. However, the traditional steam stripping deamination technology consumes a lot of steam and the unit consumption of wastewater is high.

Method used

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  • Stripping ammonia-removing method based on flash evaporation and heat pump technologies
  • Stripping ammonia-removing method based on flash evaporation and heat pump technologies
  • Stripping ammonia-removing method based on flash evaporation and heat pump technologies

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Embodiment Construction

[0033] combine figure 1 The process flow of the ammonia-containing wastewater deamination system is described as follows:

[0034] The high-ammonia nitrogen wastewater is pumped into the Venturi water injector 1, and the steam injected from the secondary flash section of the compound stripping deamination tower 3 is subjected to vapor-liquid rapid cooling and heat exchange, and then enters the compound stripping deamination tower 3 Vapor-liquid separation in the primary mixing section; the non-condensable gas in the secondary flash section of the composite stripping deamination tower 3 is pumped out by the liquid ring vacuum pump 10, and the ammonia gas brought out by the non-condensable gas is absorbed by the tail gas absorption tower 6 and then discharged;

[0035] The ammonia nitrogen wastewater in the primary mixing section of the composite stripping deamination tower 3 enters the Venturi waste water ejector 2 through the flash feed pump 7 and is steamed again by the steam...

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Abstract

The invention relates to a stripping ammonia-removing method based on flash evaporation and heat pump technologies. The method comprises the following steps of: absorbing steam which is obtained after stripping ammonia removal and rich in ammonia nitrogen with an absorption column, pressurizing the purified steam with a heat pump set for recycling, carrying out flash evaporation on wastewater subjected to ammonia-removing process with a vacuum flash evaporation set composed of a Venturi and a liquid ring vacuum pump, and directly heating for pretreating wastewater with high ammonia nitrogen content. Compared with the traditional process with high ammonia-removing steam consumption and high operation cost, the method disclosed by the invention has prominent effects in energy saving and consumption reducing, and has broad market application prospect and high application potential in the treatment of wastewater containing ammonia nitrogen.

Description

technical field [0001] The invention relates to the technical field of ammonia-containing waste water deamination treatment, and is an efficient and energy-saving de-ammonia technology developed on the basis of steam stripping deamination method combined with flash technology and heat pump technology, and is suitable for the treatment of oil refinery catalyst waste water and other ammonia-containing waste water processing fields. Background technique [0002] Petrochemical, metallurgy, food and other industries often produce a large amount of ammonia nitrogen wastewater. This type of wastewater usually also contains impurities such as sulfur, phenol, fluorine, sulfate, and silicate. As a result, it is difficult to effectively treat the wastewater. The ammonia nitrogen content in the treated wastewater cannot meet the national discharge standards, and it is directly discharged to pollute the water source. The environment has caused great damage; in addition, the cost of trea...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/20C02F101/16
Inventor 赵旭申涛张麦奎
Owner CHINA PETROLEUM & CHEM CORP
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