A system, method and application of low-temperature methanol scrubbing tail gas recovery and utilization

A low-temperature methanol washing and tail gas recovery technology, applied in separation methods, chemical instruments and methods, mechanical equipment, etc., can solve the problems of wasting valuable resources, many equipment, and cumbersome process systems, so as to solve the problem of insufficient supply and realize recycling. , the effect of simple process

Active Publication Date: 2019-09-17
LUXI CHEM GRP
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Problems solved by technology

It can be seen that the process system used in the adsorption distillation method is more cumbersome, including more equipment, which greatly increases the fixed investment and maintenance costs of the system
However, if the low-temperature methanol scrubbing exhaust gas is directly discharged into the atmosphere, it will not only pollute the environment, but also waste a lot of precious resources.
[0003] To sum up, in the prior art, there is still no effective solution to the problem of high cost of low-temperature methanol scrubbing tail gas treatment

Method used

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  • A system, method and application of low-temperature methanol scrubbing tail gas recovery and utilization

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[0030] It should be pointed out that the following detailed description is exemplary and intended to provide further explanation to the present application. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

[0031] It should be noted that the terminology used here is only for describing specific implementations, and is not intended to limit the exemplary implementations according to the present application. As used herein, unless the context clearly dictates otherwise, the singular is intended to include the plural, and it should also be understood that when the terms "comprising" and / or "comprising" are used in this specification, they mean There are features, steps, operations, means, components and / or combinations thereof.

[0032] Terminology Explanation Section:

[0033] Coal mill is a machine that breaks coal and grinds it into coa...

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Abstract

The invention discloses a Rectisol tail gas recovery system and method and their application and solves the problem that Rectisol tail gas treatment is high in cost. The technical process is simple, the main parameter is fan outlet pressure, and process parameters to be controlled are few and easy to adjust; Rectisol vented tail gas replaces seal nitrogen in a coal mill, the waste is utilized, resources are saved, and the investment in Rectisol tail gas treatment is lowered. According to the technical scheme, the Rectisol tail gas recovery system comprises a tail gas source, a separator, a fan and a coal mill, drops are removed from the tail gas source via the separator, the tail gas source is pressurized via a fan and is delivered to a sealed air passage in the coal mill so as to arrive at sealing, and the tail gas source is a Rectisol tail gas source.

Description

technical field [0001] The invention belongs to the field of tail gas utilization, and in particular relates to a recovery and utilization system, method and application of low-temperature methanol washing tail gas. Background technique [0002] At present, CO in the low-temperature methanol washing process supporting large-scale coal-to-synthetic ammonia and synthetic methanol projects 2 The recovery rate only reaches about 65%. The tail gas discharged from the low-temperature methanol tail gas washing section is mainly CO 2 (content of more than 70%) and nitrogen, and a small amount of CO, H 2 S, H 2 and methanol gas are directly discharged into the atmosphere, therefore, the CO in the exhaust gas 2 Recycling has attracted much attention from the industry. At present, the widely used carbon dioxide gas recovery and utilization methods are mainly adsorption distillation and pressure swing adsorption. However, in the adsorption distillation method, the raw material gas...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D45/08B01D53/52B01D53/76F16J15/40
Inventor 王延吉郭保方路正攀
Owner LUXI CHEM GRP
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