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Novel process for comprehensive treatment of ammonium nitrate wastewater and flue gas

A comprehensive treatment and flue gas technology, applied in the direction of ammonium nitrate fertilizer, fertilizer mixture, application, etc., can solve the problems of separate wastewater treatment device, no ammonium nitrate wastewater, high operating cost, etc., and achieve high fertilizer efficiency and good economic and technological advantages , the effect of reducing operating costs

Active Publication Date: 2012-08-22
SICHUAN LUTIANHUA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method requires large investment and high operating costs.
[0009] Based on the existing ammonium nitrate wastewater treatment technology, the common problem is that a separate wastewater treatment device needs to be established
[0023] At present, there is no technical report on using ammonium nitrate wastewater containing ammonia nitrogen as a desulfurizer to treat flue gas

Method used

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  • Novel process for comprehensive treatment of ammonium nitrate wastewater and flue gas
  • Novel process for comprehensive treatment of ammonium nitrate wastewater and flue gas

Examples

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Embodiment 2

[0053] Comparative example: A coal-fired boiler, the flue gas volume is 340000Nm3 / h, and the sulfur content is: 1.5-2%.

[0054] If the flue gas is treated with traditional ammonia desulfurization, if the sulfur content of the flue gas outlet is reduced to 180mg / l, the amount of liquid ammonia added is 700kg / h, and desalinated water is supplemented at 12 tons / h. At the same time, 2.5 tons / h of agricultural ammonium sulfate with a nitrogen content of 21% is produced.

[0055] Adopt the process of the present invention to process this flue gas: the ammonium nitrate wastewater produced by a pressurized neutralization ammonium nitrate production device is collected in the ammonium nitrate wastewater storage tank 1, the ammonium nitrate wastewater amount is 8 tons / h, wherein the ammonium nitrate content is 0.8 % (wt%), the ammonia content is 0.3%, and the NH3-N content is 2000ppm. Send the ammonium nitrate wastewater to the desulfurizer preparation tank 3 of the ammonia desulfuriz...

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Abstract

The invention discloses a process for the comprehensive treatment of ammonium nitrate wastewater and flue gas, which is characterized in that the treatment process utilizes a basic desulfuration device in an ammonia method, the ammonium nitrate wastewater is used as a replenishment desulfurizer of the flue gas, the comprehensive treatment of the ammonium nitrate wastewater and the flue gas is realized simultaneously on a set of device, and a by-product of ammonium sulfate nitrate composite fertilizer with high nitrogen content is produced. The invention has simple process, small investment, lower running and maintenance cost and high desulfuration efficiency, and the entire system has no pollution of three wastes.

Description

technical field [0001] The invention relates to the field of environmental protection, in particular to realizing the comprehensive treatment of ammonium nitrate wastewater and flue gas at the same time on a set of devices, and by-producing high-nitrogen-content ammonium sulfur nitrate compound fertilizer. technical background [0002] In the process of ammonium nitrate production, regardless of the process, a large amount of ammonium nitrate wastewater containing ammonia nitrogen will inevitably be produced in the process of neutralization and evaporation. Especially in the normal pressure neutralization process, the production of one ton of ammonium nitrate produces about 0.4 tons of condensed waste water, which contains 0.4 to 2% of ammonium nitrate and 0.1 to 1% of free ammonia, and the pH of the solution is 8 to 11. If the wastewater is directly sent back to the nitric acid desulfurization tower for reuse, it will affect safe production, and if it is not treated and dis...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/78B01D53/50C05G1/00C05C1/00
Inventor 宁忠培袁忠李勇林朝阳李庆曾贯宏王绍贵刘勤芶永桃
Owner SICHUAN LUTIANHUA