【Cracking Question Bank】The purpose of intermittent blowdown of the steam drum in a cracking furnace is
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This post was last edited by Guan Gongyu on 2015-10-24 at 21:41. True or False: The purpose of intermittent drainage from the steam drum in a pyrolysis furnace is to prevent the steam drum level from rising too high during situations such as furnace coking, temperature increase, or other abnormal conditions. ( ) Please read this question carefully; the answer is correct, as many students got it wrong. I’m already puzzled. Let’s discuss it together; correct answers earn +5, explanations earn +10, and promotion efforts earn extra points. [Petroleum and Chemicals Section] Show off your \"FangSong\" style – recommend friends to join and earn 20 wealth points
Wrong; the purpose of reducing emissions from the drum is to prevent impurities from accumulating inside it. Generally, when the furnace is shut down or during temperature increases, the drain valve is opened when the pressure in the drum reaches 5-6 kilograms. The drum drain can lower the liquid level under abnormal conditions
Error: Boiler blowdown can be divided into continuous blowdown and periodic blowdown. Continuous blowdown, also known as surface blowdown, involves the continuous removal of a portion of the boiler water from the area where the salt and alkalinity levels are highest, in order to reduce the amounts of salts, alkalis, silicic acid, and suspended solids in the boiler water. Therefore, the pipe for continuous blowdown is installed at a level 8 mm below the normal water level. Periodic blowdown is used primarily to remove deposits such as sludge and dirt from within the boiler, and thus its outlets are usually located at the lower part of the boiler drum and at the bottom of the header.
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Error: The intermittent blowdown function is used to remove the sludge accumulated at the bottom of the boiler, as well as the soft precipitates formed after phosphate treatment. Regular sewage discharge lasts for a short time, but it has a strong ability to remove the sediments from the boiler. Continuous discharge, also known as surface discharge, is a method in which the water with the highest concentration is continuously removed from the surface layer of the water in the steam drum. Its function is to reduce the salt content and alkalinity in the boiler water, preventing excessive concentration of the water from affecting the quality of the steam.
Error: The intermittent blowdown function is used to remove the sludge accumulated at the bottom of the boiler, as well as the soft precipitates formed after phosphate treatment. Regular sewage discharge lasts for a short time, but it has a strong ability to remove the sediments from the boiler. Continuous discharge, also known as surface discharge, is a method in which the water with the highest concentration is continuously removed from the surface layer of the water in the steam drum. Its function is to reduce the salt content and alkalinity in the boiler water, preventing excessive concentration of the water from affecting the quality of the steam.
The purpose of intermittent drainage from the steam drum of the pyrolysis furnace is to prevent excessive liquid level in the steam drum under conditions such as furnace coking, temperature rise, or other abnormal situations. ( √ )
The purpose of intermittent drainage from the steam drum of the pyrolysis furnace is to prevent excessive liquid level in the steam drum under conditions such as furnace coking, temperature rise, or other abnormal situations. ( √ )
The purpose of intermittent drainage from the steam drum of the pyrolysis furnace is to prevent excessive liquid level in the steam drum under conditions such as furnace coking, temperature rise, or other abnormal situations. (×) Wastewater discharge is divided into continuous discharge and periodic discharge. Continuous blowdown involves continuously discharging the boiler water with a high salt concentration from the drum into a continuous blowdown expansion tank, in order to maintain the salt content of the boiler water and thus ensure the quality of the steam ； Regular drainage involves periodically draining the lowest parts of the water circulation in order to remove impurities that have accumulated in the pipes, thereby ensuring the quality of the boiler water and supporting the safe and efficient operation of the unit