36results about How to "Reduced risk of coking" patented technology

The present invention provides a crude benzene hydrorefining process, which comprises: sequentially carrying out a liquid phase catalysis pre-hydrogenation reaction, a gas phase catalysis pre-hydrogenation reaction and a main catalysis hydrogenation reaction on crude benzene, and then carrying out extraction rectification on the material obtained from the main hydrogenation reaction to obtain distillates of various distillation ranges. Compared with the process in the prior art, the process of the present invention has the following characteristics that: the catalysis hydrogenation process is adjusted into the three stage catalysis hydrogenation technology, heavy benzol pre-separation is not required before catalysis hydrogenation, and unsaturated olefin in the crude benzene is subjected to hydrogenation at a low reaction temperature of 130-140 DEG C to prepare saturated olefin in the liquid phase catalysis reforming pre-hydrogenation step so as to avoid occurrence of system clogging due to high temperature polymerization coking of easy high temperature polymerization unsaturated olefin contained in the crude benzene in the subsequent step. In addition, heavy benzol in the crude benzene can be subjected to hydrogenation to prepare mixed aromatic hydrocarbons, wherein the mixed aromatic hydrocarbons can be used as excellent blending components, and material output values and added values are increased.

The invention discloses an aero-engine fuel nozzle structure. The fuel nozzle structure comprises a sleeve shell and an oil conveying part, wherein the oil conveying part comprises a first oil conveying part and a second oil conveying part, one end of the second oil conveying part is integrally connected with the first oil conveying part, and the other end of the second oil conveying part is connected with an auxiliary vortex device, the sleeve shell is integrally formed with the oil conveying part, a sleeve is arranged outside the second oil conveying part and is extended to the second oil conveying part from the boundary of the first oil conveying part and the second oil conveying part, a semi-closed air heat insulation cavity is provided with the radial space between the second oil conveying part and the sleeve, and elastic pieces which are in contact with the opposite side walls of the air heat insulation cavity are arranged on the open side of the air heat insulation cavity. The fuel nozzle structure has the advantages of stable and reliable structure, long service life and the like.

The invention discloses a circular-arc-shaped U valve material returning device for a high-density circulating fluidized bed utilizing the B-class particle, which relates to the technology of the circulating fluidized bed. The device mainly consists of an air supply system, a main bed system, a gas-solid separation system, a material returning system and a test system, wherein the air supply system mainly consists of air compressors; the material returning system consists of a dipleg and a circular-arc-shaped U valve material returning device; and the circular-arc-shaped U valve material returning device is provided with three wind paths. According to the circular-arc-shaped U valve material returning device disclosed by the utility model, the problems of local flowing dead corner, unsmooth fluidization and poor regulation of the traditional right-angle U valve material returning device are solved, the coking risk in the U valve material returning device is lowered, the operation stability of the high-density circulating fluidized bed is improved, and therefore, a foundation is laid for researching and developing the combustion and gasification technology of the high-density circulating fluidized bed.

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 discloses a method and device for removing particles in a biomass pyrolysis liquid fluidized bed reactor. The method comprises the following steps: A) performing primary cyclone classification to realize classification of catalyst micropowder and catalyst particles; b) performing primary filtration to separate the catalyst micropowder from conveying oil; c) performing secondary cyclone classification to realize classification of a structurally incomplete catalyst with a structurally complete catalyst; d) performing secondary filtration to separate the structurally incomplete catalyst from conveying oil; and E) mixing the structurally complete catalyst and a fresh catalyst, and adding the formed mixture into a reactor for use. The invention further provides a device for removing particles in the biomass pyrolysis liquid fluidized bed reactor. According to the method and device disclosed by the invention, the requirements of realizing particle classification and realizing the drying reduction of a separated catalyst are met, the foaming and collision of a reactor bed caused by catalyst micropowder are effectively avoided, and the coking risk is reduced.

The invention discloses a dehumidification, pyrolysis and gasification device for household garbage, and a use method thereof. The dehumidification, pyrolysis and gasification device for the household garbage comprises a garbage treatment tower, a condensation dehumidifier, a high-temperature air preheater, a low-temperature air preheater and an air blower, wherein the garbage treatment tower is sequentially provided downwards with a drying and pyrolysis chamber, a pyrolysis and gasification chamber and a roasting chamber in the longitudinal direction; and the garbage enters from the upper end of the drying and pyrolysis chamber, the generated damp-hot smoke sequentially passes through the condensation dehumidifier and the roasting chamber, the damp-hot smoke entering the roasting chamber enters the pyrolysis and gasification chamber under the action of a negative pressure, then a water-gas reaction is carried out, and a pyrolysis gas outlet is formed in one end of the pyrolysis and gasification chamber. According to the dehumidification, pyrolysis and gasification device for the household garbage, and the use method thereof which are disclosed by the invention, the retention time of the household garbage in a space can be controlled through adjusting the rotation speed of a grate bar; the heat value of a pyrolysis gas is increased while a water content in the pyrolysis gas is reduced, the risk of coking of a material layer on the rotaring grate bar of the pyrolysis and gasification chamber can also be lowered, and a carbon content in ash residue is lowered; and the household garbage with the water content of greater than 60% can be treated through using the device disclosed by the invention.

The invention discloses a method for recycling waste mineral oil. Settling pretreatment, reduced pressure distillation and hydrofining are adopted as a process route for recycling the waste mineral oil. A centrifugal process is added in reduced pressure distillation, a diluent and a deslagging agent are introduced, partial pressure of a reduced pressure system is reduced while impurities are removed, and the diluent is recycled. High-pressure and low-pressure two-stage hydrogenation is adopted for hydrofining. The technology solves the problems of coking of a waste mineral oil distillation pretreatment furnace tube, blockage of a vacuum tower, serious corrosion of hydrogenation equipment, coking of a hydrogenation catalyst bed layer, blockage of a hydrogenation reaction material outlet pipeline and the like in the prior art. The process is scientific and reasonable in technology, stable in long-period operation, efficient, environmentally friendly, high in product quality and obvious in economic benefit.

A scrap iron separation and collection system applied to an intermediate storage type pulverizing system comprises a scrap iron separator, a control cabinet used for controlling the scrap iron separator and a scrap iron collector used for collecting scrap iron, and the control cabinet is electrically connected with the scrap iron separator. The invention further relates to a scrap iron separationand collection method applied to an intermediate storage type pulverizing system. A control cabinet is used for controlling the working time of an electromagnet, the working time is 3-5 minutes, scrapiron in the pulverized coal is magnetized and adsorbed, and the scrap iron in the pulverized coal is adsorbed to the adsorption wall outside the electromagnetic coil. By means of the principle that the electromagnet loses power and magnetism, scrap iron on the adsorption wall is released through outage, automatically slides to a scrap iron collecting pipe under the action of gravity and is collected into the scrap iron collector through a scrap iron collecting descending pipe. According to the invention, the abrasion of a primary air pipe can be greatly reduced, and the coking risk of the water wall of a boiler can be reduced.

The invention discloses a low-temperature thin-layer quick-heating cascade anaerobic pyrolysis system which comprises a solid waste extrusion conveying system, a heating temperature control system anda heat preservation device. The solid waste extrusion conveying system and the heating temperature control system are arranged in the heat preservation device; pyrolysis gas outlets are formed in theheat preservation device; the solid waste extrusion conveying system is used for extruding and thinning the solid waste before conveying the solid waste; and the heating temperature control system isused for heating and pyrolyzing the extruded and thinned solid waste. According to the low-temperature thin-layer quick-heating cascade anaerobic pyrolysis system provided by the invention, the solidwaste is subjected to paving, extruding, thinning and heating, and then quickly heated and pyrolyzed; and particularly, roller sealers are arranged to form sub heating areas, so that the system has the advantages of being low in heating temperature, low in operation cost, high in heating speed, not prone to coking, high in adaptability and the like.

The invention provides a combustion furnace structure of a biomass combustion machine, and provides a combustion furnace configured with a reciprocating grate and a double-layer insulating jacket structure. The combustion furnace comprises a fire-resistant concrete lift, a heat insulating jacket layer, and a metal outer cylinder from inside out. The heat insulating jacket layer is in a double-layer jacket structure. The heat insulating jacket layer comprises a water-cooling jacket layer and an air cooling jacket layer from inside out. The combustion furnace is internally provided with a combustion chamber and a settling chamber. The reciprocating grate is arranged between the combustion chamber and the settling chamber. The reciprocating grate is formed by a movable grate and a fixed grate. A side of the combustion furnace is provided with a nozzle, and the other side is connected with a feeding system and an air supply system. Continuous motion of the reciprocating grate can make generated coking be cleared away to the settling chamber in time, preventing coking hidden danger, reducing manual decoking times, reducing labor intensity, and saving operation cost. The double-layer insulating jacket structure is beneficial for furnace body heat insulation and improves combustion efficiency.

The invention relates to a complete device for industrial production of paste (concentrated decoctions) and application of the device. The complete device comprises an extraction tank (1), a precise filter (2), a concentration tank (3), an automatic packaging machine (4), a waste residue tank (5), a vacuum pump (6), a condensate recovery tank (7), a condenser (8) and an on-line cleaning CIP and high-temperature steam sterilization system. A liquid material enters the extraction tank (1) and is extracted, then the liquid material is input into the concentration tank (3) after being filtered bythe precise filter (2), concentrated gas sequentially passes through the condenser (8), the condensate recovery tank (7) and the vacuum pump (6) and then is discharged, the concentrated liquid is a paste product, and the paste product enters an automatic packaging machine (4) for packaging. Compared with the prior art, the device is suitable for industrial and large-scale production, and has the advantages of being high in extraction speed, high in extraction efficiency, controllable in concentration temperature, capable of reducing the coking risk and the like.

The invention discloses a regeneration method and a regeneration device for a biomass pyrolysis liquid fluidized bed exhaust catalyst. The regeneration method comprises the following steps of: A) performing primary cyclone classification to remove micro powder in the exhaust catalyst; B) performing secondary cyclone classification to remove structurally incomplete catalyst particles in the catalyst; C) performing cyclone autorotation to remove a conveying medium carried by a complete structure catalyst; D) performing gas flow acceleration sorting to realize the classification of a high-activity catalyst and a low-activity catalyst; and E) mixing the high activity catalyst and a fresh catalyst and adding into a reactor for utilization. The regeneration device comprises a biomass pyrolysis liquid fluidized bed reactor, a primary cyclone classifier, a primary filter, a secondary cyclone classifier, a secondary filter, a pulsating airflow generator, a cyclone autorotator, a sorter, a cyclone separator and a gas purification tower. The regeneration device can meet the separation and classification requirements of the micro powder, the catalyst with the incomplete structure, and low activity catalyst particles in the exhaust catalyst of the hydrogenation reaction of a biomass pyrolysis liquid.

The invention discloses an anti-coking agent for a hazardous waste incineration line. The anti-coking agent comprises the following components in percentage by mass: 40-70% of sintered alumina; 10-25% of sintered calcium oxide; 10%-30% of sintered silicon oxide; 5-10% of clay; 0-5% of an auxiliary agent; wherein the sum of the mass percentages of the components is 100%. The anti-coking agent provided by the invention can increase the melting temperature of the hazardous waste material, reduce the coking risk and improve the operation state of a hazardous waste incineration line.