Method for cleaning methanol fine filter in low-temperature methanol washing device
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A low-temperature methanol washing and fine filter technology, which is applied to filter regeneration, chemical instruments and methods, and filtration separation, can solve problems such as strong adhesion of impurities, poor methanol filtration effect, and clogging, so as to reduce cleaning costs and save Maintenance costs, the effect of extending the use time
What is AI technical title?
AI technical title is built by PatSnap AI team. It summarizes the technical point description of the patent document.
A low-temperature methanol washing and fine filter technology, which is applied to filter regeneration, chemical instruments and methods, and filtration separation, can solve problems such as strong adhesion of impurities, poor methanol filtration effect, and clogging, so as to reduce cleaning costs and save Maintenance costs, the effect of extending the use time
[0029] The technical solution of the present invention is further described below, but the scope of protection is not limited to the description.
[0030] The optimal solution of the present invention provides a method for cleaning the methanol fine filter in the low-temperature methanol washing device, comprising the following steps:
[0031] ① Disassemble the filter head;
[0032] ② Remove the filter element;
[0033] ③Rinse the filter element with 0.4MPa water pressure for 10 minutes;
[0034] ④ Use 6 rows of copper brushes to clean until the surface feels free of impurities;
[0035] ⑤ Soak the filter element with phosphoric acid with a concentration of 60% and pH 3.5 for 12 hours, and use phosphoric acid to dissolve the impurities in the interlayer of the wire mesh, or make the impurity particles smaller, less than the filtration accuracy of the filter element 250um and 2.5um;
[0036] ⑥Use a general-purpose single-slot ultrasonic equipment to ultrasonically clean the ...
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PUM
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Abstract
The invention provides a cleaning method for a methanol fine filter of a low-temperature methanol washing device. The cleaning method comprises the following steps of, firstly, opening the end plug of the fine filter; secondly, disassembling the filter element of the fine filter; thirdly, washing the filter element of the fine filter with water for 5-25 minutes; fourthly, cleaning the filter element through a copper brush until no impurities can be sensed from the surface; fifthly, soaking the filter element of the filter in phosphoric acid for 10-15 hours; sixthly, performing ultrasonic cleaning on the filter core for 28-36 hours; seventhly, reassembling the filter element of the fine filter; eighthly, reassembling the end plug of the filter. The cleaning method for the methanol fine filter of the low-temperature methanol washing device can effectively clean the filter element of the filter, prolong the service time of the cleaned filter, reduce the filter cleaning cost, improving the operating efficiency of the filter and save the maintenance cost in millions every year.
Description
technical field [0001] The invention relates to a method for cleaning a methanol fine filter in a low-temperature methanol washing device, and belongs to the technical field of methanol fine filter cleaning. Background technique [0002] In the chemical production using coal as raw material, the crude synthesis gas contains a large amount of excess CO 2 , a small amount of H 2 S, COS and other acid gases, these acid gases are unfavorable to production, and the sulfides in them will cause catalyst poisoning in downstream production, and must be removed and recovered. The commonly used acid gas removal technologies in the coal chemical industry include physical absorption and chemical absorption. Among them, the physical absorption method is more economical and mature, and is widely used in industrial production, and its representatives include low-temperature methanol washing method (Rectisol) and polyethylene glycol dimethyl ether method (NHD). [0003] In the field of co...
Claims
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