Download Black Liquor Gasification by Pratima Bajpai PDF

By Pratima Bajpai

Black Liquor Gasification (BLG) is a primary of its variety to lead chemical engineers, scholars, operators of paper crops, technocrats, and marketers on useful directions and a holistic techno-enviro-economic viewpoint acceptable to their destiny or latest tasks in keeping with the therapy of black liquor for power construction. BLG describes the gasification technique as a extra effective replacement to present tactics for the conversion of black liquor biomass into strength. BLG operates mostly in sync with different how to increase pulp-making potency. This e-book explains how BLG deals the way to generate electrical energy and to reclaim pulping chemical compounds from black liquor, and why BLG could exchange the Tomlinson restoration boiler for the restoration of spent chemical substances and energy.

  • Describes the usage of black liquor as a resource of energy
  • Provides a close account of black liquor gasification procedures for the creation of strength and chemical compounds from black liquor
  • Provides instructions to chemical engineers for the therapy of black liquor

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Extra resources for Black Liquor Gasification

Example text

The pyrolyzer is a downward flowing entrained flow reactor and is cone shaped. At the top, it has an oil burner firing axially through the reactor. Nozzles are located around the periphery of the reactor near the top. These inject black liquor and recycled carbon into the hot reaction zone. Here the liquor dries and undergoes pyrolysis. The reactor is run under substoichiometric conditions and at temperatures below the melting point of the ash (Whitty and Verrill, 2004). The outlet of the reactor goes into a tail of piping that turns from a downward flow to an upward flow.

The temperature is kept below the melting point of the inorganics in the liquor. 3) (Whitty and Verrill, 2004). The char would be fed to an existing recovery boiler for reduction of sulfate along with the recovery boiler’s char. This type of system can impart more capacity for recovery boilers which have limitations in the heat transfer/flue gas sections. 2 The Copeland recovery process. (Copeland and Hanway, 1967). Other types of the system were also designed. These designs offered an alternative to the recovery boiler which can handle the full load of the black liquor for a mill.

The experiments were conducted in a 1 ton BLS per day pilot plant in Vasteras. The formation of CO and H2 in the synthesis gas was lower than expected but significantly higher for CH4. Equilibriums were calculated at different operating conditions in order to get concentration of residual carbon, CO, CO2, H2, CH4, H2S, and H2O. With only 35% relative oxidation for organics in the black liquor, a synthesis gas rich in H2, CO, and CH4 was produced. It was estimated that if the heat in the synthesis gas was used to generate steam for a steam turbine, up to 38% electrical efficiency can be obtained from the black liquor heating value, more than normal recovery boiler cycle (9À14%).

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