Regeneration method of invalid carbon molecular sieve

A carbon molecular sieve and treatment furnace technology, applied in the field of molecular sieve, can solve the problems of secondary pollution, complex process and high cost, and achieve the effects of high production efficiency, low cost and low pollution

Active Publication Date: 2015-01-28
威海华泰分子筛有限公司
5 Cites 3 Cited by

AI-Extracted Technical Summary

Problems solved by technology

The above two regeneration methods are similar, except for the pickling and water washing procedures, basically repeating the produ...
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Method used

(1) First, the invalid carbon molecular sieve is loaded into the carbon molecular sieve regeneration treatment furnace, and the furnace is rotated to maintain 10-15 revolutions/minute, and the temperature is raised to 280° C., maintained at a constant temperature, and set aside. The carbon molecular sieve regeneration treatment furnace is selected from the currently commonly used carbon molecular sieve treatment furnace in China, which is a rotary heat treatment furnace with a diameter of 350-850 mm. The temperature is controlled at 280 ° C, and the furnace rotation is maintained at 10-15 revolutions per minute, which is conducive to the regeneration of the invalid carbon molecular sieve.
[0016] The present invention regenerates the invalid carbon molecular sieve by collecting the carbonized tail gas discharged from the carbonization treatment of the heat treatment furnace. The normal carbonization process for preparing carbon molecular sieves is: use carbon molecular sieve heat treatment furnace for carbonization treatment, and raise the temperature under nitrogen protection conditions. It is 0.2Mpa. During the heating process, the temperature rise rate is controlled at 5°C/min in the range of 0-200°C, and the temperature rise rate is co...
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Abstract

The invention relates to a regeneration method of an invalid carbon molecular sieve. The regeneration method comprises the following steps: firstly, placing the failure carbon molecular sieve in a carbon molecular sieve regeneration treatment furnace, rotating a furnace pipe at the speed of 10-15 turn/minute, rising the temperature to 280 DEG C, and keeping the temperature; then, feeding carbonized tail gas produced by a carbon molecular sieve thermal treatment furnace which is performing carbonizing treatment into the carbon molecular sieve regeneration treatment furnace in which the failure carbon molecular sieve is placed, and feeding the carbonized tail gas for 30 to 60 minutes after rising the carbonizing temperature to 400 DEG C; obtaining a regenerated carbon molecular sieve after cooling, wherein, the thermal treatment furnace which produces carbonized tail gas and the carbon molecular sieve regeneration treatment furnace are the same in specification, and the regenerated carbon molecular sieve can reach the indexes before invalidation. The regeneration method has the advantages of simple technology, low cost, energy conservation, consumption reduction, low pollution and high production efficiency.

Application Domain

Other chemical processesCombustible gas purification +1

Technology Topic

Exhaust gasMolecular sieve +4

Examples

  • Experimental program(3)

Example Embodiment

[0020] Example 1: Put 100 kg of invalid CMS-220 carbon molecular sieve into a carbon molecular sieve regeneration treatment furnace with a diameter of 750 mm, heat it to a constant temperature of 280 ° C, and the furnace speed is 10-15 rpm; the diameter of the carbon molecular sieve being carbonized is The carbonized tail gas produced by the 750mm carbon molecular sieve heat treatment furnace is connected to the carbon molecular sieve regeneration treatment furnace equipped with invalid molecular sieves. The timing of feeding the carbonization tail gas is when the carbonization temperature of the heat treatment furnace reaches 400°C, and it ends after 1 hour of continuous feeding. After cooling, qualified carbon molecules can be obtained for regeneration. After inspection, the invalid carbon molecular sieve completely recovered the original index.

Example Embodiment

[0021] Example 2: Put 60 kg of invalid CMS-240 carbon molecular sieve into a carbon molecular sieve regeneration treatment furnace with a diameter of 500 mm, heat it to a constant temperature of 280 ° C, and the furnace speed is 10-15 rpm; select the diameter that is undergoing carbonization treatment It is a 500mm carbon molecular sieve heat treatment furnace. When the temperature reaches 400 ° C, the carbonized tail gas generated by the heat treatment furnace is passed into the carbon molecular sieve regeneration treatment furnace of the invalid molecular sieve, and the passage time is 45 minutes. Then natural cooling can get the recycled finished product. After inspection, the indicators of all recycled products have reached the indicators of CMS-240 carbon molecular sieve.

Example Embodiment

[0022] Example 3: Put 100 kg of invalid CMS-260 carbon molecular sieve into the carbon molecular sieve regeneration treatment furnace, raise the temperature to a constant temperature of 280 ° C, adjust the furnace speed to 10-15 rpm, and select the carbon molecular sieve of the same specification at the same time For the heat treatment furnace of carbonization treatment, when the carbonization temperature of the heat treatment furnace rises to 400°C, the carbonization tail gas generated by it is passed into the carbon molecular sieve regeneration treatment furnace equipped with invalid molecular sieves, and the tail gas is fed for 30 minutes. Qualified finished products can be obtained after cooling. After testing, all indicators of the finished products can reach the level of CMS-260 carbon molecular sieve.

PUM

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Description & Claims & Application Information

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