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Amine/ammonia evaporation and absorption integrated device and application method thereof

An application method, ammonia evaporation technology, applied in chemical instruments and methods, evaporation, separation methods, etc., can solve the problems of high energy consumption, difficult water balance, low efficiency, etc., and achieve energy consumption reduction, simple operation, and production mode flexible effects

Active Publication Date: 2021-04-13
厦门市汇创源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Evaporate amine / ammonia from the material, and then recycle and reuse, on the one hand, it can save production costs, on the one hand, it can reduce or avoid the production of amine / ammonia nitrogen wastewater, but The currently used amine / ammonia recovery, especially the recycling process generally has problems such as high energy consumption, low efficiency, and difficult water balance when the obtained ammonia / amine solution is recycled.

Method used

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  • Amine/ammonia evaporation and absorption integrated device and application method thereof
  • Amine/ammonia evaporation and absorption integrated device and application method thereof
  • Amine/ammonia evaporation and absorption integrated device and application method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0111] (1) will contain Ca(OH) 2 and Mg(OH) 2 The mixed slurry and the diethylamine acetate solution are fully mixed in the raw material premix tank, the concentration of calcium hydroxide in the slurry is 12wt%, the concentration of magnesium hydroxide is 8.1wt%, and the concentration of diethylamine acetate solution is About 25wt%; when feeding, control the molar ratio of hydroxide corresponding to calcium hydroxide to diethylamine to be 1:0.8;

[0112] (2) Use a pump to add the slurry in the premixing tank in step 1 to the ammonia distillation tower 1 through the feed port 11, control the temperature of the ammonia distillation tower to 25°C, and react the obtained calcium acetate solution and diethylamine steam, acetic acid Calcium solution and unreacted magnesium hydroxide slurry are discharged from the first material outlet 13 of the ammonia distillation tower, and the efficiency of ammonia distillation reaches 95% within two hours.

[0113] (3) The diethylamine obtain...

Embodiment 2

[0117] (1) will contain Ca(OH) 2 The slurry and the piperidine hydrochloride solution are fully mixed in the raw material premixing tank, wherein the concentration of calcium hydroxide in the slurry is 20wt%, and the concentration of the piperidine hydrochloride solution is about 30wt%; when feeding, control the hydrogen The molar ratio of the corresponding hydroxide and piperidinium ions in calcium oxide is 1:1;

[0118] (2) Use a pump to add the slurry in the premixing tank in step 1 to the ammonia distillation tower 1 through the feed port 11, control the temperature of the ammonia distillation tower to 90°C, and react the calcium chloride solution and piperidine vapor, chlorine Calcium solution is discharged from the first material outlet 13 of the ammonia distillation tower, and the ammonia distillation efficiency reaches 98% in one hour.

[0119] (3) The piperidine vapor that step 2) obtains is driven by the recycle gas and enters the 20wt% magnesium chloride that enter...

Embodiment 3

[0122] (1) Fully mix the NaOH solution and the n-butylamine formate solution in the raw material premix tank, wherein the NaOH concentration in the slurry is 10wt%, and the n-butylamine formate solution concentration is about 20wt%; , control the molar ratio of the corresponding hydroxide in sodium hydroxide to n-butylammonium formate ion to be 1:1.2;

[0123] (2) Use a pump to add the slurry in the premixing tank in step 1 to the ammonia distillation tower 1 through the feed port 11, control the temperature of the ammonia distillation tower to 130°C, and react to obtain sodium formate solution and n-butylamine vapor, and the sodium formate solution is obtained by the distillation The first material outlet 13 of the amine tower is discharged, and the amine distillation efficiency reaches 99.5% in one hour.

[0124] (3) The n-butylamine steam obtained in step 2) is driven by the recycle gas and then discharged from the gas phase outlet 12 of the amine distillation tower and the...

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Abstract

The invention relates to an amine / ammonia evaporation and absorption integrated device and an application method thereof. The device comprises an amine / ammonia distillation tower and an amine / ammonia absorption tower which are connected in series, and the amine / ammonia distillation tower is provided with a feeding port used for introducing an amine / ammonia-containing solution, a gas phase outlet, a first material outlet used for discharging materials obtained after amine / ammonia distillation and a circulating gas inlet; the amine / ammonia absorption tower is provided with a gas-phase inlet for introducing gas-phase amine / ammonia gas, an amine / ammonia absorption solution inlet for introducing an amine / ammonia absorption solution, a second material outlet for discharging an absorption material and a circulating gas outlet, the gas-phase outlet is communicated with the gas-phase inlet, and the circulating gas inlet is communicated with the circulating gas outlet; and a plurality of layers of tower plates are arranged in the amine / ammonia distillation tower and the amine / ammonia absorption tower, a pressure plate is arranged above each layer of tower plate, and a downcomer is arranged on each layer of tower plate. The device is applied to amine / ammonia cyclic utilization and amine / ammonia-containing wastewater treatment in the production process, and the purposes of low energy consumption of amine / ammonia distillation, high operation efficiency, safety, simplicity and convenience in operation, low operation cost and the like are achieved.

Description

technical field [0001] The invention relates to the technical field of chemical production, in particular to an amine / ammonia evaporation and absorption integrated device and an application method thereof, in particular to a method for amine / ammonia recycling and application. Background technique [0002] Amine / ammonia distillation and amine / ammonia absorption process is a commonly used technology for separation and recovery of amine / ammonia in chemical production and ammonia nitrogen solution treatment. During the amine / ammonia distillation operation, in order to improve the efficiency of ammonia distillation, generally add lime milk and other alkaline substances to the amine / ammonia-containing solution, and then perform operations such as preheating, decomposition, and condensation. Therefore, the existing amine / ammonia distillation process faces a series of problems such as high energy consumption, low efficiency, difficult water balance of recycled amine / ammonia solution...

Claims

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Application Information

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IPC IPC(8): B01D1/00B01D1/30B01D53/54B01D53/58B01D53/78
CPCB01D1/00B01D1/0082B01D1/30B01D53/78B01D53/58B01D53/54Y02A50/20
Inventor 钟劲光钟俊
Owner 厦门市汇创源科技有限公司
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