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Product Thermal Capacity: 1 - 20 t/h
Working Pressure: 0.7 - 2 Mpa
Product Thermal Capacity: 20 - 110 t/h
Working Pressure: 1.25 - 5.3 Mpa
Product Thermal Capacity: 2 – 20t/h
Working Pressure: 1 - 2.5 MPA
Product Thermal Capacity: 4 - 35 t/h
Working Pressure: 1.0 - 2.5 MPA
Black liquor is conventionally burned in a large unit called Kraft recovery boiler, for the dual purposes of energy production and recovery of the pulping chemicals. Kraft recovery boiler model in the present context refers to the numerical simulation for
As opposed to liquor volume or liquor solids flow to the boiler, BTU based firing uses the heat release of the liquor as the most representative value of long-term production rate. The advantage of this method is that heat release can be stabilized relative to production rates.
Black liquor recovery boilers involving a PSM-covered chemical at or above threshold quantity are covered by the PSM Standard. Gas-fired auxiliary fuel burner systems are covered by the PSM standard when used to fire black liquor recovery boilers involving threshold or …
Because the black liquor fuel contains high alkali concentrations, 18.3% sodium, 3.6% sulfur, an amount typical of midwestern bituminous coal, and measurable amounts of silica, iron oxides and other species, the black liquor boiler experience was reviewed for application to MHD boiler technology.
Introduction to Kraft process - Black liquor and The black liquor recovery boiler . Black liquor + Black liquor Wood Lignin etc. Fibers Pulping chemicals (Na 2 S, NaOH) Recovery boiler Evaporators Smelt Black liquor 75% DS Flue gas Na 2 CO 3 Na 2 SO 4 Na 2 CO 3 Na 2 S Causticizing Green
Nov 08, 2011· The first generation air system in the 1940s and 1950s consisted of a two level arrangement; primary air for maintaining the reduction zone and secondary air below the liquor guns for final oxidation.The recovery boiler size was 100 – 300 TDS (tons of dry solids) per day. and black liquor concentration 45 – 55 %.
A black liquor recovery boiler has two main functions. On one hand, it generates steam from the heat energy liberated upon combustion of the organic constituents of black liquor burned in the boiler, whereby the recovery boiler serves as a steam boiler. On the other hand, the chemicals from pulp digesting - sulphur and sodium - are recovered
The strong black liquor is sprayed into the boiler between the secondary and tertiary ports through the liquor gun ports located at about 15 feet above the furnace bottom. First, the liquor droplets dry as they fall through the hot combustion gases, then the easily volatilized components are released from the liquor droplets and burned.
Guidelines and Checklist for Specification and Construction of Black Liquor Recovery Boilers December 18, 1986 REVISED - March 5, 1991 REVISED – July 28, 2004 REVISED – May 17, 2011 All inquiries should be directed to: AF&PA Recovery Boiler Committee 893 McLean Avenue Yonkers, NY 10704 Tel. 914-776-6697 FAX 914-776-6698
also designed for high dry solids firing of 80% black liquor dry solids content in virgin black liquor. The paper will also cover some mechanical features of Jinhai boiler like material selection of furnace etc. Also some operation parameters after one and a half years in operation will be presented. 1.2 Hainan Jinhai Pulp & Paper Co.
Water can be introduced from external water wash hoses, from the black liquor piping water wash system or from faulty liquor heat exchangers. The Black Liquor Recovery Boiler Advisory Committee (BLRBAC) has developed a recommended system to avoid or mitigate smelt-water explosions. This system is known as the Emergency Shutdown Procedure or ESP.
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