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7207280 Combustion air system for recovery boilers, burning spent liquors from pulping processes  
An arrangement is disclosed for supplying an air jet form to the furnace of a recovery boiler, where the furnace has a front wall, a rear wall and side walls. Black liquor spraying devices are...
6500301 Apparatus for gasification of spent liquor  
Arrangement for understoichiometric gasification of spent liquor from chemical pulp production, comprising an upper reactor part ( 2 ), which upper reactor part is provided with a burner ( 5 ) for...
6425976 Method for black liquor gasification in recovery boilers  
The invention refers to a method for black liquor gasification in recovery boilers, of the type having a lower portion, referred to as a lower furnace and an upper portion, referred to as an upper...
6408771 Methods of improving productivity of black liquor recovery boilers  
Methods are presented to increase the throughput of a recovery boiler equipped with at least primary and secondary levels of injection of air. The methods comprise operating the recovery boiler...
6287415 Arrangement in soda recovery boiler for removing melts for maintenance  
Arrangement in a soda recovery boiler, comprising normal melt chutes (6) for removing molten salt from the recovery boiler (1). The recovery boiler (1) comprises an outlet (8), mounted in the wall...
6228214 Method for black liquor gasification in recovery boilers  
The invention refers to a method for black liquor gasification in recovery boilers, of the type having a lower portion, referred to as a lower furnace and an upper portion, referred to as an upper...
6186080 Recovery boiler  
A boiler recovers a soda component from pulp spent liquor and is able to prevent carry-over of unburnt char and deformation of a char bed configuration and to attain a stable combustion with low NO...
6183598 Process for recovering alkali and black liquor containing silicatae  
The invention relates to a process for recovering alkali and heat from a black liquor (5) containing silicate from a soda cook of e.g. grass, reed, straw and bagasse. In the process the black...
6168685 Process FOR oxidation of concentrated black liquor  
Concentrated black liquor formed in a kraft pulp mill process is treated to effect exothermal oxidation of black liquor solids, so as to heat the concentrated black liquor and consume a proportion...
6155210 Process for obtaining flue gases with low content of NO.sub.x while combusting black liquor and a recovery boiler therefor  
The invention relates to a method of firing black liquor in recovery boilers where the intention is to get fumes having a low content of nitrogen oxides (NO x ). The invention is characterized in...
6071377 Process for obtaining flue gases with low content of NO.sub.x in a black liquor recovery boiler  
The invention relates to a process for combusting black liquor in recovery boilers where the intention is to obtain flue gases which have a low content of nitrogen oxides (NO x ). The invention is...
6030493 Process for recovering chemicals and energy from cellulose spent liquor using multiple gasifiers  
Provided is a process for recovering chemicals and energy from spent liquor obtained when producing paper pulp by chemical delignificatation of fibrous raw material. The spent liquor is gasified in...
6027609 Pulp-mill recovery installation for recovering chemicals and energy from cellulose spent liquor using multiple gasifiers  
A Pulp Mill Recovery installation for producing liquors containing different concentrations of recovered process chemicals or combustion gasses containing different concentrations of process...
5992337 Methods of improving productivity of black liquor recovery boilers  
Methods of increasing the throughput of recovery boilers equipped with at least two levels of injection of air, the methods improving the thermal efficiency of the boiler with oxygen enrichment of...
5989387 Method for controlling chloride concentration in the flue gas of a recovery boiler  
A method for adjusting the chlorine equilibrium in a sulphate cellulose process, wherein part of the chlorine contained in the cycle is separated and removed. In the method, strong odour gases from...
5976318 Method for burning secondary sludge in a recovery boiler  
A method for burning secondary sludge in a recovery boiler, in which method secondary sludge is mixed with black liquor. According to the method, an alkali is added to the secondary sludge so as to...
5814189 Method for gasifying cellulose spent liquor to produce superheated steam and green liquor of low carbonate concentration  
Provided is a novel process for the preparation of an aqueous solution of alkaline compounds from a generator gas, containing carbon monoxide, carbon dioxide, hydrogen and entrained alkaline...
5746886 Method for the recovery of energy and chemicals from cellulose spent liquor containing potassium using a gasifier  
The present invention relates to a method for producing pulp cooked under alkaline conditions, in which method cellulose-containing material is brought into contact, in a digester, with an alkaline...
5707490 Method of recovering energy from waste liquors from pulp processes  
A method of recovering energy from waste liquors from cellulose pulp processes produces high quality superheated steam, a savings in material costs is achieved, and the utilization factor of the...
5683550 Method and apparatus for increasing recovery boiler capacity by withdrawing combustible gas from the furnace  
A method and system for treating waste liquors from pulping processes for recovering energy and chemicals from the waste liquors (such as kraft black liquor). A recovery boiler having a furnace for...
5683549 Process for the partial combustion of cellulose spent liquor using twin fluid nozzle burner  
The present invention is directed to a process for efficient combustion of cellulose spent liquors using a burner connected to a reactor, while supplying an oxygen containing gas, which invention...
5672246 Increasing the capacity of a recovery boiler by withdrawing some of the exhaust gases from the furnace section  
Waste liquor from cellulose pulp processes is used in a recovery boiler to recover energy and chemicals. The recovery boiler includes a furnace section in which heat and exhaust gases are...
5660685 Gasifying black liquor with recycling of generated hydrogen sulphide gas to the gasifier  
A method of preparing a digesting liquor having high sulphidity from a spent liquor obtained from digesting cellulosic fiber material, optionally without a conventional causticizing step is...
5637192 Endothermic spent liquor recovery process  
Resonant tubes of a pulse combustor are immersed in a bed of solid particles in a reaction zone to provide indirect heat from the pulsating combustion gases to the solid particles of the bed. The...
5632858 Method for gasifying cellulosic waste liquor using an injector located within the bed of fluidized material  
A system for providing heated fluidized bed gasification of a residual waste liquor provides a bed of granular material and a source of liquor provided to the material bed. An injector is situated...
5603803 Method and apparatus for recovering heat in a spent liquor recovery boiler  
A method and apparatus for use in the pulp industry for recovering heat in the spent liquor recovery boiler, whereby the boiler walls are formed of water-cooled tubes connected to the water/steam...
5562804 Method for adjusting the sulphur/sodium ratio in the flue gases of a soda recovery boiler  
A method for adjusting the sulphur/sodium ratio in a soda recovery boiler when strong sulphurous odour gases are burned therein. According to the method, sodium is introduced into the soda recovery...
5549788 Minimal effluents discharge pulp mill with chemical recovery  
Effluents are minimized from a cellulose pulp mill having a recovery boiler by concentrating liquid effluents from the bleach plant and/or liquid spills from process streams, incinerating the...
5547543 Apparatus for minimizing effluent discharges and recovering chemicals in a pulp mill  
Apparatus for a pulp and paper mill, and methods of acting on liquid effluents produced in the mill, which minimizes the discharge of polluting gaseous and liquid effluents to the environment....
5509997 Method of recovering energy from waste liquors from pulp processes  
Method of recovering energy from waste liquors from pulp processes, wherein the waste liquor is burned in a waste liquor recovery boiler and energy is recovered from the flue gases by producing...
5507912 Kraft pulping process wherein sulphide-rich and sulphide-lean white liquors are generated  
There is disclosed a process of increasing efficiency in a kraft pulping process that utilizes initial, bulk, and final delignification steps, a recovery boiler, and a caustic treatment step, which...
5486269 Gasification of carbonaceous material in a reactor having a gasification zone and a combustion zone  
A method and reactor for thermally decomposing a carbonaceous raw material (6) to recover gas and, if applicable, solid or liquid chemicals, the raw material being fed into a chamber (2) for...
5454908 Recovery boiler and method of reducing NO.sub.x emissions  
The invention relates to a method of firing black liquor in recovery boilers where the intention is to obtain fumes having a low content of nitrogen oxides (NO x ). A part of the combustion air is...
5439557 Method of recovering energy and chemicals from a spent liquor using low frequency sound in a recovery boiler  
A method of recovering energy and chemicals from a spent liquor which, after thickening to a dry content of 50-90%, is fed into a reaction chamber (1) in which a plurality of temperature zones are...
5425850 CFB black liquor gasification system operating at low pressures  
A black liquor gasification system intended for use as a replacement for a Tomlinson cycle, Chemical Recovery Unit, and which operates at a temperature below the ash melting temperature thereby...
5405496 Process for the preparation of cooking liquors having high sulphidity for sulphate pulp cooking  
The invention relates to a process for preparation, under reducing conditions, of cooking liquors having high sulphidity for sulphate pulp cooking, wherein the black liquor obtained in the cooking...
5380402 Reducing pulp mill liquid discharge  
A pulp mill has zero or minimum liquid discharges. The large amounts of liquid that must be processed to achieve this result are handled utilizing a multiple effect evaporator provided with heat...
5374333 Method for minimizing pulp mill effluents  
Apparatus for a pulp and paper mill, and methods of acting on liquid effluents produced in the mill, which minimizes the discharge of polluting gaseous and liquid effluents to the environment....
5368471 Method and apparatus for use in monitoring and controlling a black liquor recovery furnace  
A system for monitoring, controlling, and optimizing the operation of a kraft chemical recovery furnace which includes a mechanism for determining carryover particle counts, bed profile...
5364502 Control of recovery boiler operation by IR spectroscopy  
A direct monitoring and control method is provided for on-line measurement of effective alkali, carbonate, sulfate and thiosulfate concentrations in process liquors for the production of kraft...
5360514 Treatment of bleach plant filtrations using a magnesium filter  
In the bleaching of paper pulp without chlorine, such as using an OTZE or OZP bleach sequence, filtrate from subsequent stages is used as a wash liquid in preceding wash stages. The filtrate is...
5352333 Process for the partial combustion of cellulose spent liquor using twin-fluid nozzle burner  
The present invention relates to a process for partial combustion of cellulose spent liquors using a burner equipped with a liquor lance and an atomizing nozzle, which burner is connected to a...
5340440 Method for recovering chemicals using recovery boiler having at least 2 different melt sections  
Chemicals are recovered during the production of cellulose pulp by forming two different sulfidity melts in two different sections of a soda recovery boiler, and then producing cooking liquors from...
5302246 Method of managing liquid steams in a pulp mill  
In minimizing effluents from a cellulose pulp mill, liquid effluents from a bleach plant are concentrated, and then incinerated to produce a residue including sodium, sulfate, and sodium chloride....
5300191 Chlorine dioxide generation for a zero discharge pulp mill  
Chloride dioxide for a cellulose pulp mill bleach plant is produced by concentrating (evaporating) liquid effluents from the bleach plant to a concentration level high enough for incineration,...
5284550 Black liquier gasification process operating at low pressures using a circulating fluidized bed  
A black liquor gasification system intended for use as a replacement for a Tomlinson cycle, Chemical Recovery Unit, and which operates at a temperature below the ash melting temperature thereby...
5246542 Evaporation and recovery process for bleached chemical thermo-mechanical pulp (BCTMP) effluent  
The invention disclosed here is a process or system for treating the effluent from a BCTMP pulp mill. The effluent is evaporated to produce a water condensate and a remaining waste product...
5139412 Method and apparatus for profiling the bed of a furnace  
A method and apparatus for profiling the bed of a furnace involves the production of a digital image of the bed and background. The digital image is processed to determine transitions in the image...
5133831 Method of concentrating black liquor by evaporation  
A method of drying black liquor to a dry solids content of about 100% in which water is evaporated from the black liquor by direct heat exchange contact with hot smelt from a recovery furnace in...
5127992 Elimination of bleach effluents  
A process is provided for the treatment of an acidic aqueous effluent derived from a chlorine or chlorine compound bleaching process. The acidic effluent is reacted with a neutralizing base...
Matches 1 - 50 out of 115 1 2 3 >