MONO PRESSURE SYSTEM FOR PRODUCING NITRIC ACID AND METHOD OF OPERATING THEREOF

    公开(公告)号:US20250091869A1

    公开(公告)日:2025-03-20

    申请号:US18291460

    申请日:2022-08-25

    Abstract: A system for producing nitric acid at reduced power consumption, including an air compressor producing a compressed air stream; a source of pressurized oxygen-rich gas having a pressure higher than the pressure of the compressed air stream; a mixing apparatus for mixing the oxygen-rich gas/compressed air stream mixture with an ammonia gas stream; an ammonia converter to provide in a NOx gas/steam mixture; a water cooler/condenser for separating and condensing steam from NOx gas in the gaseous NOx gas/steam mixture; an absorption tower downstream the water cooler/condenser, for absorbing NOx gases in water, to provide in a stream of raw nitric acid-containing residual NOx gas and a tail gas including NOx gases. The system further includes a mechanism for splitting the tail gas into a first tail gas stream and a second tail gas stream; and a mechanism for adjusting the amount of tail gas being split.

    MONO PRESSURE SYSTEM FOR PRODUCING NITRIC ACID AND METHOD OF OPERATING THEREOF

    公开(公告)号:US20250011171A1

    公开(公告)日:2025-01-09

    申请号:US18292739

    申请日:2022-08-25

    Abstract: A production plant for producing nitric acid at reduced power, the system derived from a state-of-the art mono pressure nitric acid plant wherein the system further includes a first feature for splitting a tail gas stream into a first tail gas stream in fluid communication with an oxygen-rich gas and with compressed air and a second tail gas stream, and/or a second feature for splitting a tail gas stream into a third tail gas stream in fluid communication with an oxygen-rich gas and with compressed air and a fourth tail gas stream, a feature for pressurizing a gas downstream the absorption tower. The production plant allows for reduction of power by the air compressor. A method for operating the system, the use of the system for performing the method of the disclosure, and a method for revamping a state-of-the art mono pressure nitric acid plant into the system.

    DUAL PRESSURE SYSTEM FOR PRODUCING NITRIC ACID AND METHOD OF OPERATING THEREOF

    公开(公告)号:US20240367976A1

    公开(公告)日:2024-11-07

    申请号:US18291653

    申请日:2022-08-25

    Abstract: A system for producing nitric acid at reduced power consumption including an air compressor, to provide in a compressed air stream; a source of pressurized oxygen-rich gas having a pressure higher than the pressure of the compressed air stream; a mixing apparatus for mixing the oxygen-rich gas/compressed air stream mixture with an ammonia gas stream; an ammonia converter, to provide in a NOx gas/steam mixture; a water cooler/condenser for separating and condensing steam from NOx gas in the gaseous NOx gas/steam mixture; a NOx gas compressor, for compressing the gaseous NOx stream; an absorption tower downstream the water cooler/condenser, to provide in a stream of raw nitric acid-containing residual NOx gas and a tail gas including NOx gases; a mechanism for splitting the tail gas into a first tail gas stream and a second tail gas stream; and a mechanism for adjusting the amount of tail gas being split.

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