After the catalytic compressor stops suddenly, how should the reaction unit be operated in order to minimize catalyst loss?
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After the catalytic compressor stops suddenly, how should the reaction unit be operated in order to minimize catalyst loss?
Quickly release the flare to control the pressure in the settler using the flare valve; reduce the reaction volume. If control is not possible, cut off the feed for handling.
Firstly, it is necessary to maintain the differential pressure between the two vessels; once the flare valve is opened, it is important to prevent pressure buildup in the reactor, and the reactor pressure should be controlled promptly using the butterfly valve at the top of the distillation tower. If the differential pressure between the two devices cannot be maintained in a short period of time, cutting off the material is the safest option.
Is it possible to control the amount of catalyst loss during torch operation?
First, it is necessary to maintain the differential pressure between the two vessels; the pressure in the settler is controlled using a flare valve, and all air-cooling fans are turned on to reduce the reaction volume； The absorption stabilization system maintains pressure. When the inventory in the settler remains stable, the loss of catalyst should be minimal.
First, use a flare at the compressor inlet to ensure that pressure does not build up during the reaction; control the pressure difference between the two vessels. The reaction rate can be reduced appropriately, and air cooling can be employed during distillation to decrease the amount of rich gas. It is also necessary to promptly switch from medium pressure to low pressure in order to prevent overpressure in the medium pressure section; if low pressure cannot be maintained, atomization in the lift column will be affected, and steam used for stripping will lack the necessary lifting force, resulting in poor fluidization. Maintain stable pressure and remove the oil with uneven absorption capacity
Are you asking about leakage in the settler or in the regenerator?
Regarding the issue of catalyst leakage, it is mainly due to an improper control of the pressure difference between the two vessels (an excessively high differential pressure causes the catalyst to flow into the fractionator). Especially after material cutting, the pressure in the settler drops rapidly; in such cases, using a flare to control these fluctuations can be ineffective. Instead, increasing the amount of pre-heating steam supplied to the lift pipe can help raise the pressure in the settler, thereby preventing the differential pressure between the two vessels from becoming too high.
Stopping the compressor shouldn’t cause any leakage, right? There are large and small flares available for controlling the pressure in the settler; as long as adjustments are made in a timely manner and the large and small flares are used properly, it’s possible to maintain proper differential pressure between the two devices. The pressure in the settler may fluctuate temporarily, but this won’t lead to leakage.
1. Open the torch and control the pressure properly. 2. Rapidly reduce the feed rate, and in coordination with the fan operator, lower the wind speed and pressure. 3. Control the reverse pressure difference carefully.