Process flow of supercritical carbon dioxide dyeing combining with urea production system

Abstract

The invention relates to equipment and process for chemical industry and dyeing, in particular to a process flow of supercritical carbon dioxide dyeing combining with a urea production system. In the flow, the combination of an original or a new carbon-dioxide compressor in the urea production system and a fluid source compressor set of the supercritical carbon dioxide dyeing, or the single running or stand-by or new carbon-dioxide compressor in the urea production system, or one of the combinations including the combination of the running carbon-dioxide compressor and the stand-by carbon-dioxide compressor in the system, the combination of the running carbon-dioxide compressor and the new carbon-dioxide compressor in the system, the combination of the stand-by carbon-dioxide compressor and the new carbon-dioxide compressor in the system and the combination of the running carbon-dioxide compressor, the stand-by carbon-dioxide compressor and the new carbon-dioxide compressor in the system is selected; the selected compressor set is utilized to compress surplus carbon dioxide in the urea production system; the compressed carbon dioxide is taken as a supercritical fluid source of the supercritical carbon dioxide dyeing system and is inputted to a supercritical carbon dioxide dyeing system to complete a process flow of the supercritical carbon dioxide dyeing. In the process flow, the resources of the surplus carbon dioxide, surplus production capacity and a large number of human resources are utilized fully, the production efficiency of urea production enterprises is improved, disposable equipment investment of dyeing production is reduced, the running, maintenance and management cost of the dyeing production are reduced, and energy conservation, emission reduction and consumption reduction are realized.

Description

1. Technical field [0001] The invention relates to chemical engineering and dyeing equipment and technology, in particular to a supercritical carbon dioxide dyeing process combined with a urea production system. 2. Background technology [0002] Existing supercritical carbon dioxide dyeing is a whole process of independent operation. This process usually consists of a supercritical carbon dioxide generation unit, a dye dissolving and fiber or fabric dyeing unit, a dyed fiber or fabric cleaning unit, and a carbon dioxide separation and recovery unit. For the continuous dyeing process, the dyeing unit is divided into a dyeing section and a washing section. The fiber or fabric in the dyeing machine can automatically complete the movement from the dyeing section to the washing section. The dyeing unit and the washing unit are independent and continuous operating units. For the intermittent dyeing process, the dyeing machine does not have two stages of dyeing and washing, and th...

AI Technical Summary

Problems solved by technology

[0005] At present, the supercritical fluid dyeing process must be built separately, and the various equipment required need to be specially purchased. The carbon dioxide gas in operation also needs to be purchased separately. The one-time investment in fixed assets is large, and the operation, maintenance and management costs are very high. It has greatly hindered the industrialization and application of supercritical carbon dioxide dyeing technology

In particular, this type of process is often due to the small scale of equipment and immature manufacturing technology, which further restricts the development and application of supercritical carbon dioxide dyeing technology.

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