Boiler Blowdown

Boiler Blowdown

 

the removal of impurities from the steamwater path of a boiler unit. Boiler blowdown is classified as either continuous, with an ongoing expulsion of impurities together with boiler water from the upper drum, or periodic, with the insoluble contaminants, or sludge, and some boiler water being removed from the lower collectors of the circulation loop no more than once each shift. The heat of the blow-down water is usually utilized.

References in periodicals archive ?
Tenders are invited for provision of double stage evaporation system followed by solar evaporation pan for the boiler blowdown and regeneration water at iocl lube blending plant tondiarpet chennai
Piping for the condensate drain was arranged to mix with the boiler blowdown to neutralize the acidic discharge.
It is common to measure chloride at four points, the make-up, the feedwater, the boiler blowdown line and the condensate.
A list of these additions to the Rankine cycle, which are discussed below, may include: 0, and C02, and CO and 02 management; boiler blowdown automation; fuel oil viscosity control; Btu gas calorimeter monitoring; feed-water and condensate chemical control; and artificial intelligence diagnostics.
A description of the work of this project can be summarized to include the installation of a new boiler blowdown heat recovery system.
Regular boiler blowdown is the obvious way to control contamination, although dosing the feed with chemicals such as ammonia or hydrazine also stops some chemicals getting that far.
Such a system should be able to incorporate a boiler blowdown control loop to manage this variable as well.
It will include pretreatment of boiler water, the issues regarding the chemistry and what you need to know, the different water quality in areas of the country and how these differences affect the boiler, the quantity and use of appropriate chemicals, TDS levels, automatic monitoring, boiler blowdown, condensate return, scale build up and efficiency as a result of poor treatment.
However, this ignores energy losses that can occur after the burner, such as scaled or dirty heat transfer surfaces or excessive boiler blowdown rates.
The new RO system has reduced water and energy losses by cutting the amount of boiler blowdown and water needed.
By stripping out almost 99% of the dissolved solids, RO can reduce boiler blowdown by an order of magnitude, resulting in significant savings in energy, water and treatment chemicals.