How to reduce methanol loss in the low-temperature methanol washing process
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How to reduce methanol loss in the low-temperature methanol washing process
To reduce methanol loss in the low-temperature methanol washing process, efforts are made in the following areas: 1. Lowering the operating temperature for methanol absorption and reducing the exit temperature of the clean gas at the top of the tower, thereby decreasing the partial pressure of methanol; 2. Improving operations and management to reduce the entrainment of gas mist; 3. Enhancing distillation processes to lower the methanol content in the liquid at the bottom of the tower; 4. Reducing the temperatures at which methanol is separated from the gas in various sections, and controlling the partial pressure of methanol to minimize its loss
I. Reducing entrainment in the system； II. Maintain system stability ； III. Improve the efficiency of distillation and thermal regeneration ； IV. Ensure the temperature and purity of methanol ；
I think the main issues are: entrainment of exhaust gases, discharge of wastewater from the moisture tower, entrainment of acidic gases, entrainment of carbon dioxide in the product gas, and entrainment of purified gas – there are many ways to address these!
It mainly involves vaporization and waste liquid transport. It must be to reduce the amount of methanol that vaporizes and the amount present in the waste liquid
This post was last edited by eddy-8280103 on 2009-9-9 08:03. The saturated alcohol content is mainly present at the top of Tower T3004, while the liquid discharged from the bottom of the five towers contains almost no alcohol.
The losses of methanol from the system mainly occur in the following areas: (1) Methanol carried away from the system in the purified gas； (2) Methanol carried out of the system by the product CO2 ； (3) Methanol carried away from the CLAUS exhaust system ； (4) Methanol carried out of the system in the exhaust gases ； (5) Leaks from the device ； (6) Inadequate replacement during equipment maintenance leads to methanol loss.
The summary upstairs is very comprehensive; it’s great
However, based on practical experience, the purified gas does not carry away much methanol. The streams containing the most methanol are likely the CO2 product gas, exhaust gases, and Claus off-gases
Maintaining system stability is the fundamental way to reduce consumption
What was said upstairs is very correct. The losses of methanol in the system mainly occur in the following areas! (1) Methanol carried away from the system in the purified gas； (2) Methanol carried out of the system by the product CO2 ； (3) Methanol carried away from the system in the exhaust gases ； (4) Methanol carried out of the system in the exhaust gases ； (5) Leaks from the device ； (6) Inadequate replacement during equipment maintenance leads to methanol loss. Therefore, by controlling the temperature and pressure of methanol regeneration and circulation, ensuring stability of the control system, and improving distillation operations, methanol losses can be reduced.