# US 8,770,155 B2 · Sootblower having a nozzle with deep reaching jets and edge cleaning jets > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 8,770,155 B2 - Document ID: US8770155B2 - Status: Granted - Kind: B2 - Application number: 12/701,805 - Filed: 2010-02-08 - Published: 2010-08-12 - Granted: 2014-07-08 - Earliest claimed: 2009-02-06 - Assignees: Clyde Bergemann Power Group Americas Inc. - Applicants: Danny S. Tandra - Inventors: Danny S. Tandra - Web page: https://patentgrep.com/patent/US8770155B2 ## CPC - F28G 9/00: Cleaning by flushing or washing, e.g. with chemical solvents (appliances using jets of fluid for removing debris F28G1/16, F28G3/16) - F23J 3/023: {cleaning the fireside of watertubes in boilers} - F28G 1/166: {from external surfaces of heat exchange conduits} - F28G 3/166: {from external surfaces of heat exchange conduits} - F28G: CLEANING OF INTERNAL OR EXTERNAL SURFACES OF HEAT-EXCHANGE OR HEAT-TRANSFER CONDUITS, e.g. WATER TUBES OR BOILERS (cleaning pipes or tubes in general B08B9/02; devices or arrangements for removing water, minerals, or sludge from boilers while the boiler is in operation, or which remain in position while the boiler is in operation, or are specifically adapted to boilers without any other utility F22B37/48; removal or treatment of combustion products or combustion residues F23J; removing ice from heat-exchange apparatus F28F17/00) - F23J: REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES (combustion apparatus for consuming smoke or fumes, e.g. exhaust gases, F23G7/06) ## Abstract A sootblower having a nozzle that includes one or more deep reaching jets aligned with its respective platen bank to clean slag deposits inset from the leading edge of the platen bank. The nozzle also includes one or more edge cleaning jets substantially angled with respect to the platen bank for cleaning the leading edges of the platen bank. For most applications, the major axis of the sootblower is perpendicular to the major axis of its respective platen bank, resulting in a sootblower with a nozzle having angled and perpendicular jets, referred to as angled-perpendicular nozzles. The jet sizes are selected to balance the opposing components of force perpendicular to the sootblower to avoid the imposition of torque on the lance. ## Claims ### Claim 1 An industrial boiler comprising a plurality of sootblowers, each sootblower having a major axis along a line of insertion and retraction defining an outward direction toward insertion and an inward direction toward retraction, each sootblower located adjacent to a leading edge of a respective platen bank in the boiler having a major axis, the sootblower comprising: a nozzle; a lance tube for supplying a flow of pressurized fluid to the nozzle; the nozzle comprising one or more deep reaching jets for emitting fluid aligned with the major axis of the platen bank for removing slag deposits inset from the leading edge of the platen bank; the nozzle further comprising one or more edge cleaning jets for emitting fluid angled with respect to the major axis of the platen bank for removing slag deposits on the leading edge of the platen bank and positioned to balance in an opposing perpendicular direction the fluid emitted from the one or more deep reaching jets to substantially eliminate the imposition of torque on the lance tube from the simultaneous emission of the fluid through the jets. ### Claim 2 (depends on 1) The industrial boiler of claim 1, wherein for each sootblower: the number of edge cleaning jets is one and the number of deep reaching jets is one; the number of edge cleaning jets is one and the number of deep reaching jets is two; or the number of edge cleaning jets is two and the number of deep reaching jets is two. ### Claim 3 (depends on 1) The industrial boiler of claim 1, wherein for each sootblower the number of edge cleaning jets is one and the number of deep reaching jets is one, and wherein: the edge cleaning jet is located outward of the deep reaching jet and directed outward; the edge cleaning jet is located outward of the deep reaching jet and directed inward; the edge cleaning jet is located inward of the deep reaching jet and directed outward; or the edge cleaning jet is located inward of the deep reaching jet and directed inward. ### Claim 4 (depends on 1) The industrial boiler of claim 1, wherein for each sootblower: the number of edge cleaning jets is one; the number of deep reaching jets is two; the edge cleaning jet and a first deep reaching jet are located on a side of the nozzle; and the second deep reaching jet is located on an opposing side of the nozzle. ### Claim 5 (depends on 1) The industrial boiler of claim 1, wherein for each sootblower: the number of edge cleaning jets is two; the number of deep reaching jets is two; the edge cleaning jets are located outward of the outward most deep reaching jet; and the edge cleaning jets are directed outward; the deep reaching jets are located on an opposing side of the edge cleaning jets. ### Claim 6 (depends on 1) The industrial boiler of claim 1, wherein for each sootblower at least one edge cleaning jets is directed approximately 50 degrees with respect to the major axis of the platen bank. ### Claim 7 (depends on 1) The industrial boiler of claim 1, wherein for each sootblower at least one edge cleaning jet is directed within the range of approximately 30 degrees to approximately 80 degrees with respect to the major axis of the platen bank. ### Claim 8 (depends on 1) The industrial boiler of claim 1, wherein for each sootblower the pressurized fluid comprises steam, air, or water. ### Claim 9 (depends on 1) The industrial boiler of claim 1, wherein the one or more edge cleaning jets have larger diameters than the one or more deep reaching jets at the respective ends of the jets where the flow of pressurized fluid exits the jets. ### Claim 10 (depends on 1) The sootblower of claim 1, wherein the one or more edge cleaning jets have larger diameters than the one or more deep reaching jets at the respective ends of the jets where the flow of pressurized fluid exits the jets. ### Claim 11 A sootblower in or for an industrial boiler, the sootblower having a major axis along a line of insertion and retraction defining an outward direction toward insertion and an inward direction toward retraction, comprising: a nozzle; a lance tube for supplying a flow of pressurized fluid to the nozzle; the nozzle comprising one or more perpendicular jets for emitting fluid perpendicular to the major axis; and the nozzle comprising one or more angled jets for emitting fluid angled with respect to perpendicular to the major axis of the sootblower and positioned to balance in an opposing perpendicular direction the fluid emitted from the one or more perpendicular jets to substantially eliminate the imposition of torque on the lance tube from the simultaneous emission of the fluid through the jets. ### Claim 12 (depends on 11) The sootblower of claim 11, wherein: the number of angled jets is one and the number of perpendicular jets is one; the number of angled jets is one and the number of perpendicular jets is two; or the number of angled jets is two and the number of perpendicular jets is two. ### Claim 13 (depends on 11) The sootblower of claim 11, wherein the number of angled jets is one and the number of perpendicular jets is one, and wherein: the angled jet is located outward of the perpendicular jet and directed outward; the angled jet is located outward of the perpendicular jet and directed inward; the angled jet is located inward of the perpendicular jet and directed outward; or the angled jet is located inward of the perpendicular jet and directed inward. ### Claim 14 (depends on 11) The sootblower of claim 11, wherein: the number of angled jets is one; the number of perpendicular jets is two; the angled jet and a first perpendicular jet are located on a side of the nozzle; and the second perpendicular jet is located on an opposing side of the nozzle. ### Claim 15 (depends on 11) The sootblower of claim 11, wherein: the number of angled jets is two; the number of perpendicular jets is two; the angled jets are located outward of the outward most perpendicular jet; and the angled jets are directed outward; the perpendicular jets are located on an opposing side of the angled jets. ### Claim 16 (depends on 11) The sootblower of claim 11, wherein at least one angled jets is directed approximately 50 degrees with respect to perpendicular to the major axis of the sootblower. ### Claim 17 (depends on 11) The sootblower of claim 11, wherein at least one angled jet is directed within the range of approximately 30 degrees to approximately 80 degrees with respect to perpendicular to the major axis of the sootblower. ### Claim 18 (depends on 11) The sootblower of claim 11, wherein the pressurized fluid comprises steam, air, or water. ### Claim 19 A method for cleaning an industrial boiler comprising a plurality of platen banks, each platen bank having a major axis, comprising the steps of: installing a plurality of sootblowers in the boiler, each sootblower having a major axis along a line of insertion and retraction, each sootblower located adjacent to a leading edge of a respective platen bank; configuring each sootblower with a nozzle and a lance tube for supplying a flow of pressurized fluid to the nozzle; configuring each nozzle with one or more deep reaching jets for emitting fluid aligned with the major axis of its respective platen bank for removing slag deposits inset from the leading edge of the platen bank; further configuring each nozzle with one or more edge cleaning jets for emitting fluid angled with respect to the major axis of its respective platen bank for removing slag deposits on the leading edge of the platen bank, wherein the one or more edge cleaning jets have larger throat diameters than the one or more deep reaching jets; for each sootblower, supplying pressurized fluid while inserting, rotating, and retracting the sootblower to remove slag deposits from its respective platen bank; and for each sootblower, sizing the jets to balance forces lateral to the major axis of the sootblower resulting from emission of the fluid to substantially eliminate the imposition of torque on the lance tube from the simultaneous emission of the fluid through the jets.