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Ammonia water synthesis process

A synthesis process, ammonia water technology, applied in the preparation/separation of ammonia, etc., can solve the problems of complex operation and high investment cost, and achieve the effect of simple process operation and low investment cost

Active Publication Date: 2021-04-20
宁波四明化工有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problems of complex operation and high investment cost in the prior art, the application provides an ammonia synthesis process

Method used

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Embodiment Construction

[0033] The following is attached Figure 1-4 The application is described in further detail.

[0034] The embodiment of the present application discloses an ammonia water synthesis process. refer to figure 1 , including the following steps:

[0035] S1: Pass the tail gas containing ammonia gas into the lower end of the ammonia absorption tower 1, the desalinated water station will store the processed desalted water in the desalted water storage tank 4, start the delivery pump 2, and the delivery pump 2 will transfer the desalted water to the desalted water storage tank 4 The desalted water is passed into the ammonia absorption tower 1 to absorb the ammonia gas, the desalted water enters the ammonia absorption tower 1 and then falls, and finally enters the lower end of the ammonia absorption tower 1, and the water intake of the desalinated water is controlled by liquid level interlocking;

[0036] S2: The desalted water in the gas ammonia absorption tower 1 is cooled by a ci...

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Abstract

The invention relates to an ammonia water synthesis process which comprises the following steps: S1, introducing tail gas containing ammonia gas into the lower end of a gas ammonia absorption tower, starting a delivery pump, introducing desalted water in a desalted water storage tank into the gas ammonia absorption tower by the delivery pump, and absorbing the ammonia gas,wherein the gas ammonia absorption tower is a bubble cap tower with five tower plates, desalted water falls plate by plate after entering the gas ammonia absorption tower and finally enters the lower end of the gas ammonia absorption tower, and the water inlet amount of the desalted water is controlled by liquid level interlocking; S2, cooling the desalted water in the gas ammonia absorption tower by using a circulating pump and an external plate heat exchanger, directly spraying the desalted water back to the upper space of the gas ammonia absorption tower, absorbing ammonia gas, and controlling the flow of the low-temperature desalted water by using temperature at the upper end of the gas ammonia absorption tower in an interlocking manner; and S3, starting an ammonia water pump, and discharging ammonia water at the lower end of the gaseous ammonia absorption tower into an industrial ammonia water storage tank by the ammonia water pump for storage. The ammonia gas in the tail gas can be recycled, waste of the ammonia gas is reduced, operation is easy, and the investment cost is low.

Description

technical field [0001] The application relates to the field of tail gas scrubbing with good water solubility, in particular to an ammonia synthesis process. Background technique [0002] The synthetic ammonia factory needs to produce 20-22% ammonia water and process and recover various ammonia-containing tail gases. The common process is a three-tower series absorption process, that is, the first tower is cooled and washed at 30-40°C, and the tower kettle obtains 20-22% ammonia water and continuously extracts it. Ammonia water product; the second tower cools and washes the concentrated ammonia water at the top of the first tower at 20-25°C to dissipate ammonia gas and unabsorbed ammonia gas in the tail gas, and the tower kettle obtains 1-5% ammonia water and continuously pumps it into the second tower The top of one tower continuously enters fresh water; the third tower uses dilute sulfuric acid to absorb the residual ammonia in the tail gas to ensure that the ammonia conten...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01C1/02
Inventor 齐渊林金甫严智达
Owner 宁波四明化工有限公司
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