Problem with increasing the amount in the transformation system!
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We have great design capabilities, but our actual production volume is very small. We plan to conduct test runs with increased loads now. What should be taken into account when changing work sections during such test runs? (The testing capacity is roughly twice the current production capacity; it is possible to achieve the testing capacity in terms of design!) ) Medium-low-low process! This post was last edited by snowdfr on 2009-1-19 21:58]
Transformation systems are classified into medium voltage, low voltage, medium series low voltage, low series low voltage, etc.; what you said is not accurate；
During trial runs with increased amounts, care should be taken to monitor for overheating of the bed layer; the increase in amount must be gradual and not too rapid. After each increase, the change in bed layer temperature should be observed. Steam must be added first when increasing the amount.
1. The oxygen content in semi-water gas must be less than 0.5%. 2. First, use qualified gas to purge the system； 3. After replacement, reduce the medium-voltage transformation; during this reduction process, strictly and stably control the levels of CO and O2 to prevent temperature increases due to changes in composition. 4. Carry out separate vulcanization for the low-voltage transformation ； 5. After the medium-low catalyst reduction and heating are complete, proceed to light load! 6. At light load, special attention must be paid to the steam content entering the low-temperature conversion catalyst. At light load, and with a new catalyst in use, the amount of steam used is low, which helps to prevent back-sulfidation of the low-temperature conversion catalyst! Remember!
When increasing the dosage, be careful not to let the bed temperature exceed its limit or experience significant fluctuations; add steam promptly to maintain proper CO levels, and increase the dosage gradually.
When increasing the dosage in the conversion system, the following points should be noted: 1. The increase in dosage must be gradual to prevent the catalyst from overheating； 2. The steam-to-gas ratio must be adjusted accordingly to prevent excessive CO levels at the outlet ； 3. Pay attention to the changes in the inlet and outlet temperatures of each heat exchanger, and make adjustments in a timely manner ； 4. Pay attention to adjusting the water circulation volume of the water cooler to ensure the temperature parameters in all parts of the system.
The dosage increase must be done slowly; pay attention to the temperature of the catalyst layer, and provide the appropriate amount of steam (to maintain the gas-to-steam ratio).
1. The dosage increase should be gradual; the vapor-to-gas ratio must be maintained at no less than 0.35, to prevent excessive CO levels at the outlet and to avoid overheating of the catalyst. 2. Pay attention to the changes in the inlet and outlet temperatures of each heat exchanger, and make adjustments in a timely manner. 3. Pay attention to adjusting the circulation volume of the water cooler to ensure the temperature parameters in all parts of the system.
The design capacity is quite high; at present, the actual production volume is only half of that design capacity. There’s no need to worry too much about increasing the production volume. First and foremost, it’s necessary to control the composition of the gas strictly in accordance with the process specifications； Secondly, the steam volume must be sufficient to meet the requirements for addition; to control the steam-to-gas ratio properly, it is necessary to ensure an adequate amount of steam, and the control valves must function well ； Third, after increasing the dosage, there are usually fluctuations in the total carbon level of the purified gas; therefore, the system must be well-prepared and appropriate countermeasures must be taken (for alcoholization processes, it is necessary to check the circulation pumps and electric furnaces, while for copper washing processes, copper pumps must be ready and the copper content must be adjusted accordingly) ； Fourth, the adjustment of the desalinated water must also keep pace ； Fifthly, it is necessary to adjust the components of the semi-degasification and full-degasification solutions properly, regulate the circulation rate, keep pumps in standby mode, and ensure proper control of gas quality (including desulfurization and decarburization processes), in order to prevent sulfur from causing damage to subsequent systems (some of such damages can be fatal).
1. Check the pump water pump to prevent pressure from rising; start the backup pump promptly if there is insufficient flow. 2. When adding material, add steam first to avoid CO levels from exceeding the limit. 3. After adding material, the space velocity increases which causes the furnace temperature to drop, so adjustments must be made promptly