EP2920359B1 - Method for leaching recovery-boiler ash

vacuum-water-boiler-t6

vacuum water boiler t6

The boiler adopts an environmentally friendly combustion method - full premixed combustion, and the gas and air are precisely adjusted and premixed in advance to ensure more complete combustion.

water-tube-steam-boiler

water tube steam boiler

The boiler adopts a double-drum longitudinal "D" type arrangement structure; water, steam or steam-water mixture flows in the pipe; flame burns and flue gas flows outside the pipe, forming extremely fast steam-water.

EP2920359B1 - Method for leaching recovery-boiler ash


40 Tech News PROVEN METHODS - ANDRITZ42 NO. 36 / 2-2017 an existing recovery boiler layout. When the need for ash treatment capacity increases, the solid-liquid separation of the leaching system can become a bottleneck. The ARC process is generally more suitable for larger chloride and potassiumPatents Assigned to Andritz Oy - Justia Patents Search19/4/2017 · Method for leaching recovery-boiler ash Patent number: 9719209 Abstract: A method to be used in conjunction with a single-stage or multi-stage process for leaching ash originating from the recovery boiler of a pulp mill, particularly when the ash contains a

Process for purifying ash which principally consists of …Ash from a recovery boiler is purified by leaching or evaporation-crystallizing contaminants such as, chlorides and potassium salts in water. The leaching or evaporation-crystallizing takes place in an aqueous solution at a temperature that is in the vicinity of the boiling point of the aqueous solution.US9719209B2 - Method for leaching recovery-boiler ash - …ash leaching solids stage fraction Prior art date Kefid Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.) Active

Heavy metals leaching in bottom ash and fly ash fractions from industrial-scale BFB-boiler for environmental risks assessmentHeavy metals leaching in bottom ash and fly ash fractions from industrial-scale BFB-boiler for environmental risks assessment Risto PÖYKIÖ1, Mikko MÄKELÄ2,3, Gary WATKINS4, Hannu NURMESNIEMI5, Olli DAHL4 1. Department of Environmental2.Disposing of Secondary Sludge in the Recovery Boiler25/9/2016 · disposal in the recovery boiler. For a typical integrated mill, secondary sludge dry solids are equivalent to about 1% of the black liquor solids. This paper will review the process for hydrolyzing the secondary sludge, its impact on the evaporators and recovery

Processing of Egyptian boiler-ash for extraction of …1/8/2002 · The standard method applied for recovery of vanadium from vanadium containing slag consists of roasting the ash in a rotary kiln at 800 C for 3 h. followed by leaching with water to produced soluble sodium vanadate (Sastry, 1968, Solbodin, 1975, Cheng, 1987,,Disposing of Secondary Sludge in the Recovery Boiler25/9/2016 · disposal in the recovery boiler. For a typical integrated mill, secondary sludge dry solids are equivalent to about 1% of the black liquor solids. This paper will review the process for hydrolyzing the secondary sludge, its impact on the evaporators and recovery


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EP2920359B1 - Method for leaching recovery-boiler ash Related Information

40 Tech News PROVEN METHODS - ANDRITZ

42 NO. 36 / 2-2017 an existing recovery boiler layout. When the need for ash treatment capacity increases, the solid-liquid separation of the leaching system can become a bottleneck. The ARC process is generally more suitable for larger chloride and potassium

Patents Assigned to Andritz Oy - Justia Patents Search

19/4/2017 · Method for leaching recovery-boiler ash Patent number: 9719209 Abstract: A method to be used in conjunction with a single-stage or multi-stage process for leaching ash originating from the recovery boiler of a pulp mill, particularly when the ash contains a

Process for purifying ash which principally consists of …

Ash from a recovery boiler is purified by leaching or evaporation-crystallizing contaminants such as, chlorides and potassium salts in water. The leaching or evaporation-crystallizing takes place in an aqueous solution at a temperature that is in the vicinity of the boiling point of the aqueous solution.

US9719209B2 - Method for leaching recovery-boiler ash - …

ash leaching solids stage fraction Prior art date Kefid Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.) Active

Heavy metals leaching in bottom ash and fly ash fractions from industrial-scale BFB-boiler for environmental risks assessment

Heavy metals leaching in bottom ash and fly ash fractions from industrial-scale BFB-boiler for environmental risks assessment Risto PÖYKIÖ1, Mikko MÄKELÄ2,3, Gary WATKINS4, Hannu NURMESNIEMI5, Olli DAHL4 1. Department of Environmental2.

Disposing of Secondary Sludge in the Recovery Boiler

25/9/2016 · disposal in the recovery boiler. For a typical integrated mill, secondary sludge dry solids are equivalent to about 1% of the black liquor solids. This paper will review the process for hydrolyzing the secondary sludge, its impact on the evaporators and recovery

Processing of Egyptian boiler-ash for extraction of …

1/8/2002 · The standard method applied for recovery of vanadium from vanadium containing slag consists of roasting the ash in a rotary kiln at 800 C for 3 h. followed by leaching with water to produced soluble sodium vanadate (Sastry, 1968, Solbodin, 1975, Cheng, 1987,,

Disposing of Secondary Sludge in the Recovery Boiler

25/9/2016 · disposal in the recovery boiler. For a typical integrated mill, secondary sludge dry solids are equivalent to about 1% of the black liquor solids. This paper will review the process for hydrolyzing the secondary sludge, its impact on the evaporators and recovery

Figure 1 from Selective Leaching of Vanadium from …

The present work aims to optimize an efficient, economic and environmental hydrothermal method to leach vanadium from boiler ash residue using sodium carbonate and bicarbonate mixture solution. For this purpose, many factors include liquid/solid phase ratio, leaching temperature, leaching time, oxidant addition and it's percent and ash fineness are studied and optimized.

EP2427598A1 - Process for improved leaching of …

The invention relates to a process for purifying recovery boiler electrostatic precipitator ash (via 19) from chlorides (Cl) and potassium (K), and recover useful pulping chemicals such sodium sulphate (Na 2 SO 4 ).

Reactive leaching of recovery boiler fly ash

17/5/2016 · Abstract: This thesis studied a new CaO leaching method for chloride and potassium removal from recovery boiler fly ash. The concept of this method is to use calcium oxide (or calcium hydroxide) as an additive in the leaching stage in order to ease the subsequent solid-liquid separation.

recovery boiler - Traduction en français - exemples …

The waste heat recovery boiler is further characterized in that, in the brackish water drum, the cross-sectional shape in the water surface direction of water that accumulates in the brackish water drum is circular. The recovery boiler comprises a system (8) which is used for enriching flue gases with fuel and air and is connected to the pipes for supplying flue gases (11, 12).

Prediction of the Solubility of Recovery Boiler Precipitator Ash, …

the recovery cycle [1]. These processes include ash leaching, evaporation-crystallization, freezing-crystallization and ion exchange, recovery boiler operating conditions [7–9]. For inland

Removal of hazardous trace elements from recovery …

A novel method for the removal of hazardous metals from recovery boiler fly ash was introduced. • The highest removal efficiencies were generally obtained at pH 11.7–12.2. • Good removal efficiencies can be obtained without pH adjustment. • The removal process

WO2011002354A1 - Process for improved leaching of …

The invention relates to a process for purifying recovery boiler electrostatic precipitator ash (via 19) from chlorides (Cl) and potassium (K), and recover useful pulping chemicals such sodium sulphate (Na 2 SO 4 ). The inventive process uses two centrifugal separation stages (2a, 2b) in series with a leaching stage (1 a and 1 b) ahead of each

Leaching and Crystallization Methods for Chloride and …

Leaching and Crystallization Methods for Chloride and Potassium Removal from Recovery Boiler Fly Ash, 2017PEERS. Chloride and potassium are harmful non-process elements in the kraft chemical recovery cycle. In high concentrations they can cause severe corrosion and fouling of the recovery boiler …

Patents Assigned to Andritz Oy - Justia Patents Search

19/4/2017 · Method for leaching recovery-boiler ash Patent number: 9719209 Abstract: A method to be used in conjunction with a single-stage or multi-stage process for leaching ash originating from the recovery boiler of a pulp mill, particularly when the ash contains a

WO2014076361A1 - Method for leaching recovery-boiler …

1. A method for treating ash of a recovery boiler of a pulp mill in conjunction with a single-stage or multi-stage leaching process, wherein at least one calcium compound is employed as an additive

Effective removal of hazardous trace metals from …

15/2/2018 · Abstract. The objective of this study is to introduce a treatment sequence enabling straightforward and effective recovery of hazardous trace elements from recovery boiler fly ash (RBFA) by a novel method, and to demonstrate the subsequent removal of Cl and K with the existing crystallization technology. The treatment sequence comprises two stages:

US9719209B2 - Method for leaching recovery-boiler ash - …

A method to be used in conjunction with a single-stage or multi-stage process for leaching ash originating from the recovery boiler of a pulp mill, particularly when the ash contains a significant amount of carbonate, wherein calcium compounds, such as calcium