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JP2011214830A |
To provide a device and a method enlarging a boiler and by this, optimizing and simplifying increase of capacity.The boiler includes a device supplying secondary air and a device supplying tertiary air defined by a front wall, a rear wal...
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JP4749544B2 |
Stable oxidizing biocide formulations containing bromine are provided for biofouling control in industrial water systems. The formulations contain at least one stable oxidizing bromine compound that is prepared from at least one oxidizin...
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JP4741797B2 |
The method is for cooking of cellulose pulp in which the raw material, preferably in the form of chips, undergoes a successive elevation of temperature towards the cooking temperature while the chips are first impregnated with an impregn...
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JP2011132637A |
To provide a green liquor system scale formation inhibitor capable of sufficiently inhibiting scale formation in a green liquor production system, and to provide a method for inhibiting such scale formation using the inhibitor.The green ...
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JP2011132624A |
To provide a method for dewatering scum discharged in a papermaking process without using chemicals.The dewatering method for the scum discharged in the papermaking process removes water from the scum containing water in sludge such as s...
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JP4695545B2 |
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JP4682195B2 |
The filter (101) is cleaned using the filtrate as the cleaning fluid. A method for cleaning the filter cloth and/or filter cake in a pressurised white liquor filter in a process where lime is added to a green liquor before the filter, wh...
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JP2011078971A |
To provide a method for effectively separating lignin and an alkaline component from an alkaline black liquor discharged by a paper or paper pulp manufacturer and for purifying water obtained after separation.An acid is added to the blac...
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JP4672531B2 |
To provide a method for treating a green solution, by which impurities in the green solution can enough be removed by a simple process and apparatus. This method for treating the green solution, comprising adding an anionic polymer coagu...
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JP4663816B2 |
To provide a technique for improving the causticizing process in pulp production. In the causticizing process of pulp production, improvement of lime sludge dewaterability, decrease of dreg generation and, moreover, high whitening of cal...
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JP4663815B1 |
To provide a technique for improving the causticization step in pulp production.A method for producing a causticized precipitated calcium carbonate is provided, comprising the following way: in the causticization step in a pulp productio...
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JP4661308B2 |
To provide a method for stabilizing the operation of causticizing process and obtaining calcium carbonate as byproduct. The method comprises the following procedure: A green liquor obtained in the kraft pulp production process is caustic...
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JP2011046554A |
To provide a method for manufacturing an acicular light calcium carbonate suitable as a pigment for a coated paper which is excellent in pulverizability under an easy and relatively broad synthesis condition needing no complex synthesis ...
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JP4617561B2 |
To provide a method for treating collected ash, by which chlorine and potassium are removed from collected ash in a digesting chemical recovery process in a pulp production. This method for treating collected ash in a digesting chemical ...
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JP2011001641A |
To provide a system for effectively recovering waste heat of a lime kiln of an apparatus for a treatment of regenerating lime in the papermaking industry.A large heat recovery is enabled by arranging a heat exchanger 130 in which PFA or ...
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JP2010280219A |
To provide a composite material panel which is made from an Arundo donax (one kind of a grass), and to provide a pulp produced from the Arundo donax.The Arundo donax is finely broken (at the step 20) to a suitable size, and binders are a...
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JP4575615B2 |
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JP2010229602A |
To provide a simple method of efficiently producing a sulfide salt such as sodium sulfide and sodium disulfide in an alkali solution in an alkali recovery process in the production of pulp.A sulfide salt such as sodium sulfide and sodium...
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JP2010228941A |
To provide a technique to improve a whiteness degree of causticized light calcium carbonate as a byproduct in a causticizing process for regenerating a cooking white liquor in a pulp production process by a sulfate method or a soda metho...
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JP4562159B2 |
To provide a method for dehydrating lime mud in low foaming tendency stably affording reduction in the water content of lime mud cake even under fluctuation of process conditions. This method for dehydrating lime mud involves addition of...
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JP2010203030A |
To provide an improved alternative method for using heat from black liquor to heat white liquor or a mixture of white liquor with other liquids used for treating fiber materials in a digestion kettle. The method for heating white liquor ...
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JP4542282B2 |
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JP4506085B2 |
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JP4502507B2 |
A method is provided for the use of borates in the recausticization of alkali-containing liquors such as those produced in the chemical and semi-chemical pulping of wood and in the oxidation and bleaching of wood pulp. Sodium hydroxide i...
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JP4502508B2 |
A method is provided for improving causticizing efficiency in the conventional lime recausticization portion of an alkaline pulping process. Such processes are commonly used in the pulping and bleaching of wood and non-wood cellulose fib...
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JP2010132522A |
To provide a method of producing calcium carbonate having high whiteness which can be used as a pigment for coated paper and in which impurity is not contained, from lime sludge formed when unslaked lime or slaked liquid produced by maki...
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JP2010116659A |
To provide a high-bleaching oxidized white liquor widely usable as an alkali source in the oxidation bleaching stage (oxygen delignification stage) of the initial stage of pulp bleaching sequence, alkali extraction stage, or the like, re...
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JP4453707B2 |
To provide a scale formation inhibitor that can be produced by an inexpensive and simple production system and sufficiently inhibits scale formation in a green liquor production system. The scale formation inhibitor comprises a copolymer...
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JP2010084279A |
To provide calcium carbonate slurry which disperses dark colored suspended matters derived from unburned carbon included in caustic calcium carbonate by adding at least two kinds of specific dispersing agents, while being also excellent ...
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JP2010076946A |
To provide a method for producing calcium carbonate being usable as a pigment for coating paper and having high whiteness from lime sludge produced when quicklime or a slaked liquor obtained by reacting quicklime with a sodium hydroxide-...
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JP2010058072A |
To provide a dehydration accelerator of lime sludge which has low foaming property and stably reduces the moisture content of lime sludge cake even if process conditions vary in a causticizing process of kraft pulp manufacturing, and to ...
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JP4425901B2 |
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JP4346248B2 |
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JP4340019B2 |
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JP4339528B2 |
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JP2009213959A |
To coagulate and separate lignin from a black liquor containing no sulfide discharged from a pulp cooking process by a water treatment technology and to remove an organic matter remaining in a filtrate to collect water, an acid, and caus...
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JP4320057B2 |
A process using an amphoteric ion-exchange resin, also known as a "snake-cage polyelectrolyte" resin separates kraft white liquor into sulphide-rich and caustic-rich components. The sulphide-rich component can be used in the initial stag...
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JP4314626B2 |
To effectively inhibit the scale precipitation occurring in the alkali recovery process by admixing a water-soluble calcium salt to the water in the alkali recovery process in a paper pulp factory. A water-soluble calcium salt, for examp...
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JP2009179917A |
To provide a method for concentrating a black liquor by which the concentration efficiency is improved, while the concentration can be heightened, and the efficiency of heat transfer of a heat transfer surface is maintained by the preven...
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JP4312869B2 |
The present invention has an object to obtain a cooking liquor containing polysulfide-sulfur at a high concentration by minimizing by-production of thiosulfate ions. The present invention is a method for producing polysulfides, which com...
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JP4313257B2 |
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JP4304995B2 |
To provide a technique of improving the whiteness of causticized light calcium carbonate produced as a by-product in a causticization process for regenerating white liquor for digestion in a pulp production process by a sulfate process o...
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JP4304990B2 |
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JP2009156523A |
To inexpensively reduce NOx in an exhaust gas generated in a rotary kiln.A material is charged from a material supply device 20 into a kiln of the rotary kiln 10, and an additive agent for denitration is sprayed to a part of an adequate ...
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JP4284171B2 |
The invention relates to a method and an arrangement in the production of electric energy in a boiler plant of a pulp mill. Black liquor having a dry solids content of more than 80% and combustion air are fed into a furnace of a recovery...
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JP4276789B2 |
Method of producing a process steam from a first black liquor derived in connection with the production of paper pulp, wherein the first black liquor is treated to give a second black liquor of a higher concentration than the first black...
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JP4236818B2 |
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JP4230612B2 |
In a process for producing kraft pulp, the process is made closed, the yield of pulp is improved and environmental problems are minimized. An alkaline solution containing Na2S which flows in a process of producing kraft pulp, is electrol...
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JP4214441B2 |
Method and device for removal of soda melt from a soda recovery boiler in conjunction with shutdown of the soda recovery boiler, in which method the supply of lye into the boiler is interrupted and, if necessary, the pile of congealed so...
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JP2009001438A |
To provide a method for obtaining impurity-free high-whiteness calcium carbonate usable as a filler for paper making or a pigment for coated paper from lime sludge produced when green liquor obtained in a kraft process pulp manufacturing...
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