41results about How to "Stop coking" patented technology

The invention discloses a vertical coal dust corner tube boiler, which comprises a burner, a boiler body, an air preheating device, a waste heat water tank, a convection bank, an upper collecting box, a top collecting box, a boiler barrel and a lower collecting box. The lower collecting box is arranged at the bottom of the boiler body, and the upper collecting box and the top collecting box are arranged on top of the boiler body and communicated through a steam communicating pipe. The vertical coal dust corner tube boiler is characterized in that the burner is arranged at the bottom of the boiler body which adopts a vertical film type water cooling wall structure, four lowering pipes are arranged at four corners, and two ends of the lowering pipe and the film type water cooling wall are communicated with the upper collecting box and the lower collecting box respectively. The convection tube bundle is arranged outside the film type water cooling wall, the top of the convection tube bundle is communicated with a boiler chamber smoke outlet, and the bottom of the convection tube bundle is communicated with the waste heat water tank. The vertical coal dust corner tube boiler has the advantages of being compact in integral structure, simple in appearance display, small in covered area, low in steel consumption, big in boiler water circulation pressure difference and safe and reliable in water circulation and the like.

The invention discloses a three-return-stroke powder heat conduction oil boiler. The three-return-stroke powder heat conduction oil boiler comprises a circulating oil pump, a hearth, a burnout chamber, a convection tube bundle, tail heat exchange equipment, a combustor, a slag falling device, a lower header and an upper header, wherein the lower header is arranged at the bottom of a boiler body; the upper header is arranged at the top of the boiler body; the combustor is arranged at the front part, the top, the bottom or the side part of the hearth of the boiler; the boiler body has a full-film type water-cooled wall structure, and four main downcomers are arranged at four corners; the convection tube bundle is arranged in a convection tube bundle flue, the convection tube bundle flue is longitudinally arranged, and the height of the convection tube bundle flue is equal to that of the hearth; the upper and lower ends of the convection tube bundle, the main downcomers and a film type water-cooled wall are communicated with the upper header and the lower header respectively; the burnout chamber and the hearth are longitudinally arranged abreast in a back-to-back way, and the height of the burnout chamber is equal to that of the hearth; the hearth, the burnout chamber, the convection tube bundle flue and the tail heat exchange equipment are sequentially conducted in series; two-stage combustion-supporting and denitration secondary air is distributed in the hearth. The three-return-stroke powder heat conduction oil boiler has the characteristics of long flue gas flow, complete fuel combustion and high heat exchange efficiency.

The invention discloses a horizontal pulverized coal fired boiler with two furnace pipes. The horizontal pulverized coal fired boiler comprises a boiler shell cylindrical body and an externally-hung cylindrical body, wherein the boiler shell cylindrical body is provided with the two furnace pipes, a front pipe plate, a rear pipe plate, a front smoke box, a film-type wall reversal chamber, a skin plate and a second return smoke pipe, wherein the second return smoke plate is arranged below the two furnace pipes; the externally-hung cylindrical body is internally provided with a third return smoke pipe; the third return smoke pipe is communicated with the front smoke box by virtue of a smoke flue; the externally-hung cylindrical body is further provided with a smoke outlet; and the externally-hung cylindrical body is communicated with a water way of the boiler shell cylindrical body by virtue of an outlet pipe. The pulverized coal fired boiler is arranged as a horizontal double-furnace-pipe structure; the two furnace pipes are positioned above, and the smoke pipe is positioned below, so that smoke circulates smoothly; the overall structure is compact, the appearance arrangement is simple, the occupied area is small, and the steel consumption is low; integral transportation can be realized; and the pulverized coal fired boiler is within the protection range of the invention.

The invention provides a thermal protection structure of an oil-gas mixture for an aero-engine. The thermal protection structure of the oil-gas mixture for the aero-engine comprises an oil-gas ventilation pipeline assembly inside a support plate, a sealing cavity outer casing adaptor seat, a sealing air guiding pipe assembly inside the support plate, a two-way ventilation adaptor, an exterior oil-gas ventilation welded assembly, a split bi-functional assembly, and an exterior sealing air guiding pipe assembly.

The invention discloses a horizontal type pulverized coal boiler with a single furnace pipe. The horizontal type pulverized coal boiler comprises a shell barrel body and a plug-in barrel, wherein the single furnace pipe, a front tube plate, a rear tube plate, a front smoke box, a membrane wall backflash chamber, an outer wrapping plate and a second back stroke smoke tube are arranged in the shell barrel body, and the second back stroke smoke tube is arranged on the lower side of the single furnace pipe; a third back stroke smoke tube is arranged in the plug-in barrel and communicated with the front smoke box through a flue; a smoke outlet is further arranged on the plug-in barrel body; and the plug-in barrel body is communicated with a waterway of the shell barrel body through an outlet tube. The horizontal type pulverized coal boiler adopts the structural arrangement of the single furnace pipe, is smooth in smoke circulation by arranging the single furnace pipe on the upper portion and the smoke tube on the lower portion, and is compact in integral structure, simple in appearance distribution, small in occupation, low in steel consumption, and capable of achieving integral transportation.

The invention discloses a horizontal type two-channel pulverized coal fired boiler. The horizontal type two-channel pulverized coal fired boiler comprises a boiler shell barrel body, a left outer-hung barrel body and a right outer-hung barrel body; and the boiler shell barrel body is provided with a left boiler furnace, a right boiler furnace, a front pipe plate, a rear pipe plate, a front smoke box, a left reversal chamber, a right reversal chamber, a skin plating, a left secondary return stroke smoke pipe and a right secondary return stroke smoke pipe. A left third return stroke smoke pipe and a right return stroke smoke pipe are respectively arranged in the left outer-hung barrel body and the right outer-hung barrel body, and the left third return stroke smoke pipe and the right return stroke smoke pipe are communicated with the front smoke box through a left smoke channel and a right smoke channel respectively. The horizontal type two-channel pulverized coal fired boiler has the advantages that: (1) a boiler body adopts the arrangement of the horizontal type independent double boiler furnace structure, overall structure is compact, appearance arrangement is simple, floor space is small, steel consumption is low, and overall transportation can be achieved; (2) the left and right reversal chambers adopt membrane wall structures, furnace walls only need thermal insulation materials, overall sealing and thermal insulation performance are good, and air leakage is little; and (3) product manufacture period is short, mounting is convenient, and operation is easy.

The invention relates to a preparation method of an anti-coking composite ceramic coating for a power station boiler, and belongs to the technical field of high-temperature protective coatings. The invention particularly relates to an anti-coking composite ceramic coating material and a preparation method thereof. The composite ceramic coating material is composed of a thermal chemical reaction ceramic bottom layer and a surface glaze layer. The thermal chemical reaction ceramic bottom layer comprises the following raw materials: aggregate, a binder, a dispersing agent and water; the aggregate is prepared by uniformly mixing chrome green, boron nitride and aluminum oxide; the binder is prepared by uniformly mixing phosphoric acid with the mass concentration of 85%, magnesium oxide, aluminum hydroxide, zinc oxide and deionized water; the dispersing agent is polyacrylic acid. The bonding strength of the anti-coking composite ceramic coating is 26.6-30.2 Mpa, the high temperature corrosion resistance index is 0.116-0.158 mg/mm < 2 >, and the thermal shock resistance index is 7-15. The boiler surface is effectively prevented from coking, and the heat efficiency of the boiler is improved to a small extent. And the actual service life of the coating can exceed 10000 hours, so that the use safety and the service life of the boiler are prolonged.

The invention relates to an anti-coking oil collecting tank for passing vaporized oil. Each liquid collecting tank is composed of one or more members with a square tank structure; one end of the liquid collecting tank close to the tower wall is overlapped on a support ring, the other end is overlapped on the edge of a liquid collecting channel, the end overlapped on the support ring is higher than the end overlapped on the liquid collecting channel, and thus the liquid collecting tank is inclined to the liquid collecting channel. The liquid collecting tank in the middle part uplifts, the two ends of the middle liquid collecting tank are respectively overlapped on two neighbored liquid collecting channels, and the middle liquid collecting tank is inclined to the second liquid colleting channel. A liquid baffle plate is in a square tank shape or a triangular tank shape and is fixed above a gap between the liquid collecting tanks through a rib plate or a support plate so as to form a gas channel. The liquid collecting channel has a square tank shape structure, the oil collecting tank comprises one or more liquid collecting channels, one end of the liquid collecting channel is overlapped on a withdrawal hopper, and the bottom plate is inclined to the withdrawal hopper. The number of withdrawal hopper is one or two, and the bottom plate of the withdrawal hopper is inclined to the withdrawal opening. The provided oil collecting tank can reduce the stay time of liquid in the oil collecting tank, reduces the flow resistance, prevents the happening of coking, and guarantees the normal operation of towers at a high temperature.

The invention relates to the technical field of wires and cables, and discloses a cable extruder. The cable extruder comprises a machine body, wherein a feeding port is fixedly formed in the top of the machine body; a machine head is fixedly arranged on the front surface of the machine body; a motor is fixedly arranged on the back surface of the machine body; an extrusion sleeve positioned in themachine body is fixedly arranged at the bottom of the feeding port through a feeding port; a rotating shaft is movably sleeved with the extrusion sleeve; a honeycomb plate is fixedly arranged on the front surface of the extrusion sleeve; a cooling water outlet pipe and a cooling water inlet pipe are fixedly arranged on the two sides of the bottom of the machine head correspondingly; a spiral waterpipeline is arranged in the machine head; and a scraping head is movably arranged on the extrusion sleeve. According to the cable extruder, the scraping head with a spring is arranged in the extrusion sleeve, so that the situation of dead glue coke materials is effectively reduced, and the production efficiency is improved; and the spiral cooling water pipeline is arranged in an extrusion table of the machine head, so that the extrusion quality of the cable is guaranteed.

The invention relates to a boiler burner arrangement method, a lignite boiler and a combustion air control method of the lignite boiler, belongs to the technical field of boilers, and aims at solving the problems that in the combustion process of an existing lignite boiler, pulverized coal airflow wall painting, high-temperature corrosion, water cooling wall slagging, nitrogen oxide emission rising and the like are likely to occur. According to the boiler burner arrangement method, burners are arranged at the four corners of a hearth of a boiler on the same horizontal plane respectively, and the arrangement method comprises the steps that each burner is provided with a thick pulverized coal nozzle, a thin pulverized coal nozzle and a secondary air nozzle; the thick pulverized coal nozzle, the thin pulverized coal nozzle and the secondary air nozzle are in one-to-one correspondence to spray out thick-phase pulverized coal airflow, thin-phase pulverized coal airflow and secondary air. Concentrated-phase pulverized coal airflow is wrapped inside, so that the pulverized coal airflow is separated from the furnace wall through secondary air, pulverized coal cannot make contact with the furnace wall, and the problems of coking and high-temperature corrosion are fundamentally eradicated.