Method and apparatus for producing nitrile with controlled input pressure of spraying liquid

By controlling the input pressure of the spray liquid inlet within the range of 0.06-1.00 MPaG, and combining it with a multi-layer spray pipe structure, the problems of ammonia penetration and insufficient nozzle pressure in the ammonia absorption device were solved, achieving more efficient ammonia absorption and stable operation of the device.

CN119258755BActive Publication Date: 2026-07-24CHINA PETROLEUM & CHEMICAL CORP +1
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Patent Information

Application Number
CN202310819805.8
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2023-07-05
Publication Date
2026-07-24
Estimated Expiration
2043-07-05

AI Technical Summary

Technical Problem

In existing ammonia absorption devices, improper input pressure of the spray liquid can cause ammonia penetration, affecting the ammonia absorption effect. In addition, polymer adhesion in the circulating liquid can lead to insufficient nozzle pressure, affecting the atomization effect, especially at the far end of the device.

Method used

By controlling the input pressure of the spray liquid inlet within the range of 0.06-1.00 MPaG, the droplet size of the spray liquid gradually increases along the fluid travel direction in the spraying device, avoiding insufficient pressure at the far-end nozzles. A multi-layer spray pipe structure is adopted to enhance the gas-liquid contact effect.

Benefits of technology

This achieves more complete gas-liquid contact, improves ammonia absorption efficiency, reduces ammonia escape, ensures the operational stability of the ammonia absorption tower over long periods, and reduces the maintenance difficulty and energy consumption of the unit.

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Abstract

The present invention relates to a method for producing nitrile by controlling the input pressure of a spraying liquid and a production apparatus. The method can atomize the spraying liquid, increase the contact area with ammonia, and improve the mass transfer efficiency. The method for producing nitrile includes a step of producing a reaction product containing nitrile by subjecting a hydrocarbon raw material to an ammoxidation reaction (referred to as a reaction step), and a step of spraying a spraying liquid to the reaction product by a spraying device to cool the reaction product (referred to as a cooling step), wherein the spraying device includes a spraying liquid inlet, a first spraying pipe in fluid communication with the spraying liquid inlet, a plurality of second spraying pipes in fluid communication with the first spraying pipe and extending to both sides of the first spraying pipe perpendicularly thereto, a plurality of third spraying pipes in fluid communication with the second spraying pipes and extending to both sides of the second spraying pipes perpendicularly thereto, and a nozzle at the end of the third spraying pipes and in fluid communication therewith, and wherein the input pressure of the spraying liquid of the spraying liquid inlet is controlled to 0.06-1.00 MPaG in the cooling step.
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