# US 9,752,280 B2 · Arrangement for and a method of manufacturing a fibrous web > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 9,752,280 B2 - Document ID: US9752280B2 - Status: Granted - Kind: B2 - Application number: 15/200,973 - Filed: 2016-07-01 - Published: 2016-10-27 - Granted: 2017-09-05 - Earliest claimed: 2013-02-22 - Assignees: Valmet Technologies Oy; Wetend Technologies Oy - Applicants: Wetend Technologies Oy; Valmet Technologies Oy - Inventors: Jouni Matula - Web page: https://patentgrep.com/patent/US9752280B2 ## CPC - D21F 11/002: {by using a foamed suspension} - C01F 11/181: {Preparation of calcium carbonate by carbonation of aqueous solutions and characterised by control of the carbonation conditions} - C04B 28/10: Lime cements or magnesium oxide cements - D21F 1/00: Wet end of machines for making continuous webs of paper - D21H 17/63: Inorganic compounds - D21H 17/00: Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution - Y02P 40/18: Carbon capture and storage [CCS] - D21F: PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON - C01F: COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS (metal hydrides {monoborane, diborane or addition complexes thereof} C01B6/00; salts of oxyacids of halogens C01B11/00; peroxides, salts of peroxyacids C01B15/00; sulfides or polysulfides of magnesium, calcium, strontium, or barium C01B17/42; thiosulfates, dithionites, polythionates C01B17/64; compounds containing selenium or tellurium C01B19/00; binary compounds of nitrogen with metals C01B21/06; azides C01B21/08; {compounds other than ammonia or cyanogen containing nitrogen and non-metals and optionally metals C01B21/082; amides or imides of silicon C01B21/087}; metal {imides or} amides C01B21/092, {C01B21/0923}; nitrites C01B21/50; {compounds of noble gases C01B23/0005}; phosphides C01B25/08; salts of oxyacids of phosphorus C01B25/16; carbides C01B32/90; compounds containing silicon C01B33/00; compounds containing boron C01B35/00; compounds having molecular sieve properties but not having base-exchange properties C01B37/00; compounds having molecular sieve and base-exchange properties, e.g. crystalline zeolites, C01B39/00; cyanides C01C3/08; salts of cyanic acid C01C3/14; salts of cyanamide C01C3/16; thiocyanates C01C3/20; {double sulfates of magnesium with sodium or potassium C01D5/12; with other alkali metals C01D15/00, C01D17/00}) - C04B: LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE {(roofing granules E04D7/005)}; CERAMICS (devitrified glass-ceramics C03C10/00); REFRACTORIES; TREATMENT OF NATURAL STONE - D21H: PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR - Y02P: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS ## Abstract A method to form a fibrous web including: introducing a furnish to a headbox of a fiber web machine, wherein the furnish includes a thick stock component and a filtrate, injecting a gas into to the furnish to form a foamed furnish, and laying the foamed furnish on a wire or between wires of a wire section of the fiber web machine to form the fibrous web from the foamed furnish. ## Claims ### Claim 1 An arrangement for manufacturing a fibrous web, the arrangement comprising: means for preparing furnish of at least one of a thick stock component and a filtrate, means for delivering the furnish toward a headbox of a fiber web machine, and a headbox feed pipe comprising an injection mixing station configured to introduce and mix gas into the furnish to form a foamed furnish. ### Claim 2 (depends on 1) The arrangement as in claim 1, wherein the injection mixing station is located between a headbox screen and the headbox. ### Claim 3 (depends on 1) The arrangement as in claim 1, further comprising means for introducing surfactant to the furnish to stabilize the foamed furnish. ### Claim 4 (depends on 3) The arrangement as in claim 3, wherein the means to introduce the surfactant is at least one of: (i) arranged with the injection mixing station for introducing and mixing gas into furnish, (ii) arranged upstream of the injection mixing station for introducing and mixing gas into furnish, and (iii) arranged upstream of the means for delivering furnish towards the headbox of the fiber web machine. ### Claim 5 (depends on 3) The arrangement as in claim 3, wherein the means for introducing surfactant is an injection mixing station. ### Claim 6 (depends on 5) The arrangement as in claim 5, wherein the injection mixing station for introducing surfactant is positioned upstream of a headbox screen or upstream of a headbox feed pump. ### Claim 7 (depends on 1) The arrangement as in claim 1, wherein the injection mixing station is provided with one or more injection mixers each having an inlet conduit for receiving injection liquid. ### Claim 8 (depends on 1) The arrangement as in claim 1 wherein the gas is at least partially flue gas containing carbon dioxide. ### Claim 9 An arrangement for manufacturing a fibrous web, the arrangement comprising: a short circulation flow circuit including a headbox screen, a headbox, a headbox feed pipe between the headbox screen and the headbox, and a wire section downstream of the headbox, wherein the short circulation flow circuit is configured such that a mixture of furnish and water drained from the wire section flows sequentially through the headbox screen, headbox feed pipe and the headbox to the wire section, and an injection mixing station connected to the headbox feed pipe and configured to introduce and mix gas into the mixture of furnish and water flowing through the headbox feed pipe to convert the mixture from an unfoamed phase to a foamed phase. ### Claim 10 An arrangement for manufacturing a fibrous web, the arrangement comprising: means for preparing furnish of at least one of a thick stock component and a filtrate, means for delivering the furnish toward a headbox of a fiber web machine, a headbox feed pipe comprising an injection mixing station configured to introduce and mix gas into the furnish to form a foamed furnish, wherein the injection mixing station is located between a headbox screen and the headbox.