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Method for producing ammonium sulfate and ammonium nitrate by simultaneously desulfurizing and denitrating ammonia water and cobaltic ethylenediamine (II)

A technology of ethylenediamine and ammonium sulfate, applied in the field of producing ammonium sulfate and ammonium nitrate, and simultaneous desulfurization and denitrification of flue gas, can solve the problems of secondary pollution of solid waste, low benefit of calcium sulfite, and inability to recover sulfur resources, etc. High operating cost, large mass transfer resistance, high desulfurization and denitrification rate

Inactive Publication Date: 2013-04-17
成都西华人信合同能源管理股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Application No. 02110646.0 discloses ethylenediamine cobalt (II) combined with calcium oxide for desulfurization and denitrification, using calcium oxide to remove SO 2 Calcium sulfite is generated, but the benefit of calcium sulfite is low, so that sulfur resources cannot be recovered, and at the same time, it is easy to cause blockage of equipment and secondary pollution of solid waste

Method used

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  • Method for producing ammonium sulfate and ammonium nitrate by simultaneously desulfurizing and denitrating ammonia water and cobaltic ethylenediamine (II)

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] The flue gas desulfurization and denitration test is carried out in the device shown in the attached figure. The spray tower is a glass spray tower with a diameter of 75mm and a height of 100mm. The gas-liquid two-phase countercurrent flow is 30m in the desulfurization tower. 3 / h, 120L / h of liquid absorption liquid, temperature is 50℃, pH value is 5.5, SO 2 The inlet concentration is 2100ppm, the concentration of ammonia is 5%; the gas flow rate in the denitrification tower is 30m 3 / h, the liquid spray rate is 100L / h, the temperature is 40°C, the pH value is 8, the NO inlet concentration is 800ppm, the ammonia concentration is 6%, and the cobalt ethylenediamine concentration is 0.10mol / L. SO in flue gas 2 The import and export concentrations of NO and NO were measured by the KM940 flue gas analyzer of the British Kane Company, and the SO was exported after the operation was stable. 2 The concentration is 100ppm, the desulfurization rate is 95.2%, the NO outlet conce...

Embodiment 2

[0032] The test device and desulfurization operating conditions are the same as in Example 1, except that the operating conditions of the denitrification tower are changed, and the gas flow in the denitrification tower is 30m 3 / h, the liquid spray rate is 100L / h, the temperature is 40°C, the pH value is 10, the NO inlet concentration is 800ppm, the ammonia concentration is 6%, and the ethylenediamine cobalt concentration is 0.10mol / L. Export SO after stable operation 2 The concentration is 100ppm, the desulfurization rate is 95.2%, the NO outlet concentration is 46ppm, and the desulfurization rate is 94.3%.

Embodiment 3

[0034] The test device is the same as in Example 1, and the gas flow in the desulfurization tower is 20m 3 / h, the flow rate of the liquid absorption liquid is 80L / h, the temperature is 50°C, the pH value is 6, SO 2 The inlet concentration is 3000ppm, the ammonia concentration is 6%; the gas flow in the denitrification tower is 20m 3 / h, the liquid spray rate is 60L / h, the temperature is 40°C, the pH value is 10, the NO inlet concentration is 600ppm, the ammonia concentration is 6.%, and the ethylenediamine cobalt concentration is 0.15mol / L. SO in flue gas 2 The import and export concentrations of NO and NO were measured by the KM940 flue gas analyzer of the British Kane Company, and the SO was exported after the operation was stable. 2 The concentration is 102ppm, the desulfurization rate is 96.6%, the NO outlet concentration is 60ppm, and the desulfurization rate is 90%.

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Abstract

The invention discloses a technology for producing ammonium sulfate and ammonium nitrate by simultaneously desulfurizing and denitrating the smoke of ammonia water and cobaltic ethylenediamine (II) by a wet method, which can realize that SO2 and NO are respectively converted into (NH4)2SO4 and NH3NO3 chemical fertilizers so as to realize the recycling of the SO2 and the NO. The method is different from ordinary denitration converting the NO into N2, but a traditional absorption method is adopted, and the method has moderate operation condition, is carried out under the conditions of normal temperature and normal pressure, and has high desulfurizing and denitrating effect, low investment, low operation expense and easy regeneration of absorption liquid.

Description

technical field [0001] The invention relates to the technical field of flue gas treatment and control, specifically the simultaneous desulfurization and denitrification (SO 2 and NOx), especially the method of producing ammonium sulfate and ammonium nitrate by simultaneous desulfurization and denitrification of ammonia water and ethylenediamine cobalt (II) wet flue gas. Background technique [0002] In my country's primary energy composition and consumption, coal accounts for as high as 70%, among which coal-fired power plants are my country's coal consumption and sulfur dioxide (SO 2 ) and nitrogen oxide (NOx) emissions. SO 2 And NOx is the main pollutant in the atmosphere, they can produce acid rain, form photochemical smog, destroy ozone, and bring great harm to the environment and human health. According to statistics, in 2006, my country's SO 2 The emission of more than 25 million t, is the world's SO 2 At the same time, the emission of NOx has exceeded 10 million ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/78B01D53/60C01C1/24C01C1/18
CPCY02A50/20
Inventor 刘盛余曲兵徐园园邱伟
Owner 成都西华人信合同能源管理股份有限公司
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