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Recovery boiler is the part of kraft process of pulping where chemicals for white liquor are recovered and reformed from black liquor, which contains lignin from previously processed wood. The black liquor is burned, generating heat, which is usually used in the process of making electricity, much as in a conventional steam power plant .
The Chemrec process for gasification of black liquor from the chemical pulp industry offers to increase the yield of high-value energy products from 15 to 16% in modern recovery boilers to 22–23% for the BLG electricity concept (BLGCC) or to 55% for the BLG bio fuel concept (BLGMF), with 90+% green-house gas reduction.
The black liquor is an aqueous solution of lignin residues, hemicellulose, and the inorganic chemicals used in the process. The black liquor comprises 15% solids by weight of which two thirds are organic chemicals and the remainder are inorganic. [3] Normally the organics in black liquor are 40-45% soaps, [4] 35-45% lignin and 10-15% other ...
The weak black liquor is further evaporated to 65% or even 80% solids ("heavy black liquor" [10]) and burned in the recovery boiler to recover the inorganic chemicals for reuse in the pulping process. Higher solids in the concentrated black liquor increases the energy and chemical efficiency of the recovery cycle, but also gives higher ...
Congress's December to-do list includes an unusual item this year: a bill that could determine the home of the NFL's Washington Commanders. A key Senate committee did the same last month -- after ...
The decommissioned power station had two black liquor recovery boilers, one oil fired package boiler, one bark boiler as well as several steam turbines with the electrical output of 75 MW. [5] The new power station was designed by Metso and its boiler was manufactured by Kværner. It employs 400 people. [6]
The question has loomed over Democrats and their allies since Donald Trump was elected to a second term: Do party leaders and liberal, pro-democracy activists have the juice to launch a passionate ...
Rohan Dennis admitted to a charge of creating a risk of harm in relation to the December 2023 road death of his Olympian wife Melissa Hoskins.