Daosheng emergency standby pump for water-coal slurry boilers
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Our company plans to install two new water-coal slurry boilers. During the discussions on the plan a few days ago, we talked about the problem of coking occurring when flow is interrupted due to a sudden power outage; subsequently, we decided to use diesel generators to start emergency backup pumps. I would like to ask those of you in the industry: how do your companies avoid this problem? Do you have one emergency standby pump per reactor, or are several pumps shared among them? What is the ratio of the power of the emergency standby pump to the power of the regular circulation pump? Thank you all to the seniors for coming to offer guidance; I am extremely grateful! !
This post was last edited by dongjiang1001 on 2012-2-24 at 11:02. The standard practice is to use a steam-driven pump as a backup, but in practice, this is often not done.
How does a pneumatic pump work? The key point is that in the event of a power outage, there will definitely be no gas available, and it may not be able to function as intended! !
Besides! In chemical plants, safety is of the utmost importance. Without emergency backup pumps, in the event of coking or pipe bursts, accidents such as explosions can occur, with very serious consequences! !
This post was last edited by dongjiang1001 on 2012-2-26 at 17:38. A pneumatic pump is not actually a pneumatic pump; the standard approach is to use a pneumatic pump for normal operation, with an electric pump as a backup in case of power outages, along with a diesel generator.
That’s basically in line with what we had in mind. It’s just that does your pneumatic pump use steam as power, and can it meet the required capacity? What is your circulation flow rate?
This post was last edited by dongjiang1001 on 2012-2-27 at 22:10. Steam-driven operation is very common in industry. Last year, I built a centrifugal blower of 1100 NM³/MIN for use with a small blast furnace; it was driven by steam at a pressure of 0.32 MPa. The backup unit was electric, with a motor having a power output of 3000 kW. The greatest advantage of steam-driven operation is energy savings – steam is used directly for driving the equipment, while the waste steam can be utilized for process purposes and heating, thus adhering to the principle of hierarchical utilization of energy resources. It is recommended to refer to the “Code for Design of Boiler Rooms” GB50041, section 9.1.9: When the rated evaporation capacity of a single steam boiler is 35 t/h or more, and its rated outlet steam pressure is 2.5 MPa (gauge) or more, and when the heat load is relatively continuous and stable, and when the exhaust steam from the feed water pump can be utilized, it is advisable to use an industrial steam turbine-driven feed water pump as the main pump, with an electric feed water pump serving as the backup pump. Furthermore, this is also stipulated in the \"Regulations on the Safety Inspection of Steam Boilers.\" Article 121 states that the boiler’s feedwater system must ensure a safe and reliable supply of water. The boiler room should have backup water supply machinery. Except for boilers that belong to Class 1 power loads or have a reliable power source, or boilers for which a stop in water supply due to a power outage will not cause an accident, backup steam-driven water supply equipment should be available. The layout of the water supply system, as well as the number and capacity of backup water supply equipment, are determined by the boiler room design firm in accordance with relevant design specifications. LZ said they are using a water-coal slurry boiler; it should be a small boiler, with a capacity of 10 t/h or less. In that case, a diesel generator would be more suitable. I also have a question for the OP: how often does the manufacturer of the boiler burner recommend maintenance?