1766 results about "Phencyclone" patented technology

The invention relates to the technical field of safety and environmental protection, in particular to a negative-pressure circulating explosion-control dust removal method suitable for combustible dust places, which comprises the following steps: firstly, sealing a bin body and injecting carbon dioxide-nitrogen inert gas to generate a low-oxygen environment; then, a flow guide angle-adjustable cyclone separator, a dielectric barrier discharge plasma reactor and a waste heat thermo-acoustic transducer are driven to cooperatively capture dust, and sound node amplitude synthesis capture data are obtained through compressed sensing of a microphone; inputting the environment data and the capture data into a reinforcement learning process containing a micro-thermochemistry model, and outputting instructions for adjusting negative pressure pulse, inert flow, sound field intensity and cyclone geometry; in combination with distributed radio frequency imaging data, an adversarial digital twinborn model is generated to predict explosion free energy, and automatic rollback or shutdown is carried out when the explosion free energy exceeds a threshold, so that a safe, efficient and low-energy-consumption closed loop is formed.

A hand vacuum cleaner comprises a cyclone, a conical pre-motor filter that is positioned rearward of the cyclone and a suction motor. The pre-motor filter has a front end that faces that faces towards the cyclone air outlet. The conical pre-motor filter has an open interior volume, an outer surface, which is an upstream surface of the pre-motor filter, and an inner surface, which is a downstream surface of the pre-motor filter.

The invention discloses a cyclone separator for collecting powder coating, and relates to the technical field of cyclone separators. Comprising a barrel, the outer side of the barrel is fixedly connected with a support, the outer side of the barrel is fixedly connected with a feeding pipe, a conical barrel is fixedly connected to the bottom of the barrel, a spiral plate is fixedly connected to the inner wall of the conical barrel, a spiral groove is formed in the inner wall of the conical barrel, a round hole is formed in the middle of the top of the barrel, and a supporting column is fixedly connected to the top of the barrel; the number of the supporting columns is multiple, the multiple supporting columns are evenly distributed with the discharging assembly as the center, the tops of the supporting columns are fixedly connected with a bearing plate, and the top of the bearing plate is fixedly connected with the motor. According to the cyclone separator for collecting the powder coating, a definite flowing path is provided for dust particles by arranging the spiral groove and the spiral flow guide groove, so that dust can move towards the dust discharging opening more smoothly, the accumulation and backmixing phenomena of the dust on the inner wall of the conical barrel are reduced, and the dust discharging efficiency and stability are improved.

The invention provides a CFB (circulating fluid bed) boiler for heating molten salt by sucking smoke in a tail flue, and belongs to the technical field of CFB boilers coupled with molten salt heat storage. The problem that the scale and efficiency improvement of industrial production are seriously limited due to the fact that a traditional CFB boiler unit is generally lack of high-capacity and high-parameter industrial gas supply capacity is solved. The system comprises a hearth, a separating and returning system and a tail flue, the separating and returning system comprises a cyclone separator, and a low-temperature superheater high-temperature section, a low-temperature superheater low-temperature section, a high-temperature economizer, an SCR device, a low-temperature economizer and an air preheater are sequentially arranged in the tail flue in the flowing direction. A high-temperature flue gas leading-out pipeline is arranged between the low-temperature superheater high-temperature section and the low-temperature superheater low-temperature section, a low-temperature flue gas leading-out pipeline is arranged between the high-temperature economizer and the SCR device, and the outlet end of the high-temperature flue gas leading-out pipeline and the outlet end of the low-temperature flue gas leading-out pipeline are both connected with the inlet end of the mixer. The device is mainly used for the CFB boiler unit.

The utility model discloses a coupled biomass chemical looping combustion system which comprises an air reactor, a cyclone separator, a return feeder and a fuel reactor, the air reactor is communicated with the return feeder through the cyclone separator, the air reactor is configured to complete an oxidation reaction based on the received oxygen carrier and air, the generated oxidation-state oxygen carrier is conveyed to the cyclone separator under the driving of flue gas, and the corresponding oxidation-state oxygen carrier is conveyed to the return feeder through the cyclone separator; the return feeder is respectively communicated with the air reactor and the fuel reactor through a material conveying pipe, the input oxidation-state oxygen carrier is input into the air reactor and / or the fuel reactor by the return feeder, and the fuel reactor completes an oxidation-reduction reaction based on the received oxidation-state oxygen carrier and biomass fuel; the fuel reactor is used for inputting the reduced oxygen carrier into the air reactor through a return pipe; and the exhaust port of the fuel reactor is provided with a carbon dioxide trapping device so as to complete trapping of discharged carbon dioxide.

To properly guide a flow of granular material to a probe in a measuring system for measuring characteristics of the granular material separated from gas by a cyclone separator.SOLUTION: A separation system includes: a cyclone that separates granular material from mixed fluid containing a gas and the granular material; a container that has a truncated conical portion whose diameter gradually decreases downward and is connected to a granular material outlet of the cyclone so that the granular material separated by the cyclone falls while swirling; a conical cone disposed in the container; and a measurement probe that has a measurement unit disposed downstream of a flow of the granular material passing between a lower end of the cone and an inner wall of the container and measures a particle diameter of the granular material passing through the measurement unit.SELECTED DRAWING: Figure 1

The invention discloses a cyclone separation and moving particle bed coupled pulverized coal pyrolysis oil gas high-temperature dust removal system, and belongs to the technical field of coal clean utilization. The system comprises a cyclone separator, a fine filtration unit, a filter material cyclic regeneration unit and an intelligent control unit, the fine filtration unit comprises a particle bed, a particle bin is arranged at the top end of the particle bed, and a composite filter material layer is arranged on the particle bed; a dust-containing high-temperature oil gas pipeline and a pretreatment high-temperature oil gas pipeline are arranged at the top end of the cyclone separator, dust-containing high-temperature oil gas is introduced into the cyclone separator through the dust-containing high-temperature oil gas pipeline to be pretreated, and the pretreated dust-containing high-temperature oil gas is introduced into the particle bed through the pretreatment high-temperature oil gas pipeline to be finely filtered; and a coke breeze discharge pipe is arranged at the bottom of the cyclone separator. The invention is used for solving the technical problem of low gas-solid separation efficiency at high temperature caused by the adoption of a single filter material in the existing pulverized coal dust removal system.

The present invention relates to the technical field of chemical equipment, particularly to a porous carbon activation method, which comprises: inputting a carbon raw material and a preset reaction gas into a fluidized bed reaction device to carry out an activation reaction to prepare porous carbon, and the fluidized bed reaction device comprises a feeding tank, a raw material preheating furnace, a reactor, a heating unit and a discharging tank, a gas distributor, a stirring paddle, a cyclone separator and / or a metal filter column are arranged in the reactor; the activation method comprises the following steps: S1, conveying a carbon raw material to a raw material preheating furnace, and preheating in an inert atmosphere; s2, conveying the preheated carbon raw material into a reactor, introducing reaction gas under a preset activation condition, and carrying out an activation reaction to obtain activated porous carbon; s3, under the protection of an inert atmosphere, conveying the activated porous carbon to a discharging tank, cooling, and discharging to obtain a porous carbon product; through stepped activation and multi-section temperature control design, the problems of poor product uniformity and high energy consumption of a traditional process are solved.

A hand vacuum cleaner has a hand vacuum cleaner front end having a dirty air inlet, a cyclone and a dirt collection chamber that is external to the cyclone. The cyclone has a cyclone axis of rotation which intersects a cyclone front end and a cyclone rear end. A front door is provided which, in an open position, opens the dirt collection chamber. The front door has a first part which extends generally transverse to the cyclone axis of rotation and a second part that extends rearward at a non-zero angle to the cyclone axis of rotation and the first part.

The drying machine for sludge treatment comprises a drying cylinder, a conveying device and a waste gas treatment device, a feeding opening is formed in the top of the drying cylinder and communicates with the conveying device, a jacket is arranged on the outer wall of the drying cylinder, an electric heating wire is arranged in the jacket, and two rotating shafts are symmetrically arranged in the drying cylinder; a plurality of hollow blades are evenly welded to the side wall of each rotating shaft, the right side of the top of the drying cylinder is connected with a waste gas treatment device, and the waste gas treatment device comprises a cyclone separator and a waste gas filtering tank; generated waste gas is introduced into the cyclone separator, dust in the waste gas is separated out by utilizing centrifugal force generated by the cyclone separator, the separated gas enters the waste gas filtering tank, harmful impurities in the gas are adsorbed and filtered by the activated carbon layer, and the treated gas is discharged into the atmosphere, so that the pollution of the dust and the harmful impurities to the environment is reduced; to-be-dried sludge is heated through the inner wall of the drying cylinder, the rotating shaft and the electric heating wires in the hollow blades, the heating area is increased, and the drying efficiency is improved.

The invention relates to a chemical looping combustion variable load system based on flue gas recirculation and a control method. The system comprises a chemical looping combustion system and a flue gas recirculation system (7), the chemical looping combustion system comprises an air reactor (1), a fuel reactor (2), an AR cyclone separator (3), an FR cyclone separator (4), an AR material return device (5), an FR material return device (6), an air supply system (8) and a fuel supply system (9). By controlling the flow and temperature of recirculated flue gas of the flue gas recirculating system and cooperatively controlling the opening degree of the conical valve and the circulating flux of the system, the load of the chemical looping combustion system is flexibly adjusted, the energy consumption is reduced, the efficiency is improved, and the operation cost is reduced; and the rest high-temperature flue gas enters a flue gas treatment system to be treated, high-purity CO2 gas is obtained after heat exchange, condensation and purification, and finally efficient combustion of fuel and low-energy-consumption carbon capture are achieved.

A cone or cylindrical tube stack with narrow in-between gap circumferential surface swirling cyclone separator according to the present invention, creating swirling flow by flowing along the convex outer surface of the inner-stacked cone or cylindrical tube. The inner wall of the outer-stacked cone or cylindrical tube, which is a concave surface, serves as the wall for collecting fluid with larger or higher density particles that is opposite to the surface for swirling, which is disposed in accordance with the separation movement of larger or higher density particles that centrifuged from swirling by their inertial force. The distance that the particles travel towards the wall for collecting fluid with larger or higher density particles is short due to the narrow swirling and separating gaps, combined with the flow on the convex curved surface of the cone or cylindrical tube walls which pressure drag is low, this results in higher swirling speeds than those on the concave inner surface of conventional cyclone, significantly increasing the inertial force of particles centrifuged away from the swirling. Consequently, the separation efficiency of the cone or tube stack circumferential surface swirling cyclone separator according to the present invention is much higher than that of conventional cyclone separators. Especially in cases where the cyclone fluid separator according to the present invention is equipped with multi-stage separation, where the final stage utilizes multiple small cyclones, and in configurations where multiple cones are stacked and equipped with device for swirling and counter-flow separation, which convex fluid drainage ridges are installed on the wall for collecting fluid with larger or higher density particles, the ridges curving towards the side that the swirling flow flows to, sloping from the downstream edges of the cones or cylindrical tubes towards the upstream edges of the cones or cylindrical tubes, which counter to the swirling flow along the convex curved surface of the outer circumferential surface of cone or cylindrical tube. When working with a reverse swirling system, enabling to recycle multiple separation within the system before the fluid exits the separator, enabling high separation efficiency for separating various types of fluids mixed into emulsion or separating micron-level dust such as PM 2.5 from the air.

The utility model provides an anti-clogging cyclone separator which comprises a barrel and a cone which are coaxially connected up and down in the vertical direction, a medium inlet is formed in one side of the barrel in the tangential direction, an exhaust pipe upwards penetrating to the outside is coaxially arranged in the middle of the barrel, a particle discharge port is formed in the bottom end of the cone, and a flow guide device is further arranged at the bottom of the cone. The flow guide device comprises a plurality of flow guide plates, the flow guide plates are of conical cylindrical structures, the inclination degree of the side faces of the flow guide plates is the same as that of the cone, so that the flow guide plates form a coaxial nested structure at the bottom of the cone, and bottom discharge ports of the flow guide plates are correspondingly formed in the bottom end of the cone. According to the utility model, a plurality of layers of separation spaces are formed by the adjacent guide plates and the inner wall of the cone, and gas can be simultaneously contacted with the inner surface and the outer surface, so that the friction separation efficiency of granular impurities is improved. And the bottom of the cone is divided into smaller spaces, so that the airflow speed is higher, adsorption and adhesion are not easy to occur, and the probability of bottom blockage of the cyclone separator is reduced.

The invention relates to axial-flow cyclone separator-particle bed coupling gas purification equipment which comprises a coupling purification part used for staged treatment and purification of impurity-containing gas; comprising an axial particle bed for loading captured particles, at least one axial-flow type cyclone separator is nested in the axial particle bed, and the bottom end of the axial-flow type cyclone separator penetrates out of the axial particle bed and then is communicated with a cyclone ash bucket; the trapping particle conveying and regenerating part is used for regenerating used dust-containing trapping particles, the bottom end of the trapping particle conveying and regenerating part is communicated with the trapping particle waiting area, and the top end of the trapping particle conveying and regenerating part can be communicated with the feeding area. The axial-flow cyclone separator and the axial particle bed are coupled in a nested manner, the process is compact, the occupied area is small, solid particles of 3 microns or above can be separated, multi-stage separation and fine treatment of impurity-containing gas are achieved, and meanwhile the requirement for integrated removal of multiple pollutants can be met.

The utility model discloses a novel sample grinding and powdering device which comprises a grinding mechanism, a material receiving mechanism and a bottle transferring mechanism, a first material receiving position is arranged below an outlet at the lower end of the grinding mechanism, and a second material receiving position is arranged adjacent to the first material receiving position; the material receiving mechanism comprises a first material receiving mechanism and a second material receiving mechanism; the bottle transferring mechanism is located on the side faces of the first material receiving position and the second material receiving position. The first material receiving mechanism comprises a first bottle placing assembly capable of ascending and descending. The second material receiving mechanism comprises a cyclone separator assembly, the cyclone separator assembly can selectively communicate with an outlet in the lower end of the grinding mechanism, and a second bottle placing assembly capable of ascending and descending is arranged below an outlet of the cyclone separator assembly. The automatic secondary sample receiving device is ingenious in design conception, simple in structure and reasonable in layout, can realize automatic secondary sample receiving and automatic sample bottle transfer, effectively reduces the loss rate of samples, and enables the recovery rate of the samples to reach 98% and 99%.

The invention discloses a raw material conveying device for polyaluminum chloride production and a working method. The raw material conveying device comprises a conveying pipe, a damping base, a storage tank, a fluidization anti-blocking module, a dust pumping system and a control unit. The upper portion of the conveying pipe is connected with hose discharging openings of a plurality of sets of storage tanks corresponding to the powder screening devices through star-shaped discharging valves. The bottom of the storage tank is mounted on a damping base, and a vibrator is fixedly mounted on the lower side of the storage tank; the storage tank is internally provided with a fluidization anti-blocking module which can fluidize materials through airflow so as to prevent blocking and caking; the dust suction system comprises a dust suction hood arranged at the top of a feeding pipe on the upper side of the storage tank, and the dust suction hood is connected with a cyclone separator capable of collecting dust generated in the feeding process and an induced draft fan through pipelines. The raw material conveying device for polyaluminum chloride production has the functions of effectively solving the problems of caking, blockage and dust caused by moisture absorption of materials and automatically adjusting conveying parameters according to material characteristics.

The invention discloses a process for producing polyaluminum chloride by recycling aluminum ash. The process comprises a primary aluminum ash pretreatment process, a secondary aluminum ash deamination process, an ammonium chloride crystallization process, a liquid polyaluminum chloride process and a solid polyaluminum chloride process, the primary aluminum ash pretreatment procedure comprises a first cyclone separator, a ball mill, a screening machine and a bag-type dust collector, the input end of the first cyclone separator is connected with a primary aluminum ash bin through conveying equipment, the coarse ash end of the first cyclone separator is connected with a feeding port of the ball mill, and a discharging port of the ball mill is connected with a feeding port of the screening machine; fine powder screened by the screening machine and secondary aluminum ash fine powder discharged by the first cyclone separator are collected into a secondary aluminum ash bin, and dust outlets of the first cyclone separator, the ball mill and the screening machine are connected with a dust inlet of the bag-type dust collector through pipelines. By arranging a series of structures, the produced polyaluminum chloride is high in purity, the economic benefit of the process is improved, tail gas is washed, and the pollution is reduced.

The invention provides a metallurgical bio-coke preparation system and method based on bio-oil graded utilization. The system comprises a first pyrolyzing furnace, a cyclone separator, a first condensing device, a second condensing device, a pickling device, a granulating device, a first conveyor, a second pyrolyzing furnace, a coke oven and a second conveyor, an outlet of the first pyrolyzing furnace is connected to an inlet of the cyclone separator, and a solid phase sequentially passes through the cyclone separator, the pickling device, the granulating device, the first conveyor, the second pyrolyzing furnace, the coke oven and the second conveyor; a gas phase and a liquid phase sequentially pass through the cyclone separator and the condensing devices, a heavy oil outlet of the first condensing device is connected to the granulating device, and a light oil outlet of the second condensing device is connected to the pickling device. According to the system and the method, through graded utilization of the bio-oil, the characteristics of the metallurgical bio-coke are autonomously regulated and controlled, the utilization rate of biomass is increased, and meanwhile extra cost and risks caused by a supply chain are avoided.

The invention discloses a device for preparing a molten carbon fertilizer through solid waste microwave pyrolysis and waste heat recovery, and belongs to the field of solid waste treatment and recycling. The device is composed of a pretreatment unit, a microwave pyrolysis unit, a gas-solid separation unit, a gas phase treatment unit, a solid phase treatment unit and a waste heat circulation unit, solid waste enters a microwave rotary kiln after being dried and crushed, a magnetron generates microwave anaerobic pyrolysis under photovoltaic power supply, and a high-temperature gas-solid product is generated; the cyclone separator is used for separating flue gas from solid carbon, the flue gas is condensed to obtain pyrolytic oil and gas, and waste heat of medium-temperature flue gas is recovered through the heat accumulating type heat exchanger for drying; cooling the solid carbon through a heat pipe heat exchanger, recovering waste heat and liquefying urea, and mixing the solid carbon and the urea in a stirring melting pool to prepare a molten carbon fertilizer; and the waste heat backflow fan sends the carbon waste heat back to the drying chamber. The system is driven by green electricity, gas and solid phase waste heat is recovered through double paths, solid waste efficient pyrolysis-product high value-energy self-circulation is achieved, and energy consumption and carbon emission are reduced.

The utility model discloses a multi-hearth circulating fluidization and activation integrated furnace device for preparing activated carbon by a physical method, and relates to the field of activated carbon preparation of an activation furnace and a waste activated carbon thermal regeneration device. The device comprises a sealed spiral conveyor, a feeding pipe, a baffling type air cap, a pneumatic conveying medium inlet, a distributing device, a discharging pipe, a discharging pipe, a material cooling machine, a top gas mixer, a cyclone separator, a material returning device, a slag discharging pipe, a gas case, a bottom gas air cap and a slag cooling machine. Through the cyclone separator, carbonaceous semi-coke particles with the particle size larger than 100 micrometers are captured, activating agent gas flow is recycled from the lower hearth to the material layer of the upper hearth through the baffling type air cap, and granular carbonaceous materials flow into the material layer of the lower hearth through the discharging pipe after being fluidized and activated from the upper hearth and are continuously fluidized and activated for product collection; the activating agent is saved, and meanwhile, the activated carbon yield of a carbonaceous raw material is increased, so that the integrated furnace device is more environment-friendly and economical.

A surface cleaning apparatus comprising a surface cleaning head, the surface cleaning head comprising a first liquid separation stage comprising a cyclone having a cyclone axis of rotation, a cyclone first end, an axially spaced apart second end, a cyclone air inlet, a cyclone air outlet and an axially extending sidewall wherein a portion of the sidewall comprises a screen and, when the surface cleaning apparatus is in use to clean a floor, the cyclone axis of rotation extends generally horizontally and, a first liquid collection region that is positioned at a lower elevation than the screen.

The utility model relates to the technical field of airflow material circulation drying, and discloses an airflow material anti-caking circulation drying device which comprises an upper material bin and a lower material bin, a top cover is fixedly connected to the top of the upper material bin, and circulation anti-caking airflow drying assemblies are arranged in the upper material bin and the lower material bin. The circulating anti-caking airflow drying assembly is used for efficiently drying materials with the large moisture content and effectively preventing the materials from caking in the drying process, the circulating anti-caking airflow drying assembly comprises a cyclone separator, a stirring assembly is arranged in the discharging bin, and the stirring assembly is used for stirring the materials. According to the utility model, materials and airflow can be effectively separated through the cyclone separator, and adhesion among material particles is broken through continuous stirring of the stirrer, so that the effect of effectively preventing the materials from caking in the drying process is realized, and the problems of non-uniform drying, unstable product quality and the like caused by material caking are solved; and the material drying uniformity and efficiency are improved.

The utility model discloses an anti-blocking cyclone separator which comprises a cyclone separator body, an air inlet is formed in the cyclone separator body, an air outlet is formed in the upper end of the cyclone separator body, and a discharging port is formed in the lower end of the cyclone separator body. The cyclone separator comprises a cyclone separator body, a washing mechanism is arranged in the cyclone separator body, a wall scraping mechanism is arranged in the cyclone separator, and the washing mechanism and the wall scraping mechanism are matched for use, so that when the cyclone separator is used, firstly, the cyclone separator body can separate solid particles or liquid drops from gas through matched use of an air inlet, an air outlet and a discharge port; when solid particles are attached to the inner wall of the cyclone separator body, dust can be treated by opening the flushing mechanism and the wall scraping mechanism, the situation that the dust is not easy to treat after being layered in the inner wall of the cyclone separator body is avoided, the flushing mechanism and the wall scraping mechanism use the same power source, and energy consumption can be reduced.

The utility model discloses a high-pressure air sand and chlorine removal system in a salt cavern compressed air energy storage system, which belongs to the technical field of energy storage and comprises a sand removal pry connected with a salt cavern injection-production tree, and a cyclone separator, a filter separator and a coalescence separator which are sequentially connected with the sand removal pry, the devices are connected through a pipeline. According to the system, high-pressure air sand removal and dechlorination are achieved, meanwhile, large pressure loss and temperature loss are avoided, the working environment of follow-up equipment can be guaranteed, the risk of corrosion and blockage is reduced, the safety and reliability of the equipment are improved, and the system is very suitable for being coupled into the energy release link of compressed air energy storage.

The furfural gas-residue separation device comprises a condensation box, an air separator and a spraying separator, a cyclone separator is connected with the spraying separator through a first air pipe, the spraying separator is connected with the condensation box through a second air pipe, the cyclone separator comprises a cyclone separation cylinder, and the cyclone separation cylinder is connected with the spraying separator through a second air pipe. A first air return pipe is arranged in the center of the upper end in the cyclone separation cylinder; the spraying separator comprises a spraying separation cylinder, an inner rotating cylinder is arranged in the spraying separation cylinder, a plurality of suspension wires are arranged at the upper end in the spraying separation cylinder and the lower end of the inner rotating cylinder, a plurality of suspension beads are arranged on each suspension wire, a second air return pipe is arranged in the center in the inner rotating cylinder, and a spraying pipe is arranged on one side of the second air return pipe; the furfural gas residues are subjected to multi-stage separation in various forms of centrifugal gravity, centrifugal spraying and shaking filtering, and layer-by-layer pushing is performed, so that the separation effect of the furfural gas residues is improved, and the purity of furfural gas is improved; in addition, in the spraying separation process, furfural gas residues can be pre-cooled at the same time, and the condensation efficiency is improved.

The invention relates to the technical field of desulfurization tower steam-water separation, and particularly discloses a steam-water separation device applied to flue gas at the tail part of a desulfurization tower of a catalytic cracking unit, the steam-water separation device comprises a steam-water separator shell which is arranged on the desulfurization tower, and also comprises a humidity sensor for detecting the water content of the flue gas; the collecting parts of the blades are connected through a rotating shaft; the first driving device is used for driving the blades to revolve along the central axis of the steam-water separator shell; the second driving device drives the blades to rotate according to feedback data of the humidity sensor so as to change the inclination angle of the blades. Through the centrifugal effect of the cyclone separator and self-adaptive adjustment of the blade angle, the condensation efficiency of water vapor in flue gas is remarkably improved, meanwhile, the rotating speed of the motor and the inclination angle of the blade are dynamically adjusted in combination with linkage control of the humidity sensor and the industrial personal computer, energy consumption is reduced, and the optimal balance between the separation efficiency and energy consumption is achieved.

Equipment for crushing and grading magnesium oxide comprises a composite grading machine, a striking crushing and stripping machine, a spiral feeding machine, a circulating fan, a cyclone separator, a bag-type dust collector and an air compressor, and is characterized in that a crushing and grading unit is upgraded and grafted on the magnesium oxide crushing and grading equipment by utilizing the air flow advantage of closed-loop circulating air; on the basis of ensuring that the content of MgO is not reduced due to the influence of moisture and CO2 in air in the crushing and grading process, heavy MgCO3 fine powder and coarse MgO powder in raw powder are separated and graded to the maximum extent, and a low-grade magnesium oxide product containing a small amount of MgCO3 is obtained through an outlet of a 1 # air-lock valve of a composite grading machine; a high-grade magnesium oxide fine powder main product is obtained through an outlet of a second air-lock valve of the cyclone separator, and a high-grade magnesium oxide superfine powder product is obtained through an outlet of a third air-lock valve of the bag-type dust collector. By adopting a simple mode of coarse particle stripping shell shrinkage crushing instead of coarse particle grinding, the non-calcined magnesite powder is prevented from entering the fine powder, and the amount of the magnesium oxide fine powder is also increased. Operation is simple and easy to control, productivity efficiency is high, production is safe and environmentally friendly, and market application prospects are wide.

The invention relates to the technical field of cleaning equipment, in particular to a blowing and sucking integrated dust suction device which comprises an airflow circulation part and a dust separation execution part, the airflow circulation part comprises at least two stages of venturi tubes which are sequentially connected in series and communicated, and the venturi tubes are covered with collecting covers; a collecting cavity is formed in the collecting cover, a collecting opening and a backflow opening which are communicated with the collecting cavity are formed in the collecting cover, a backflow pipeline is connected between the backflow opening and the Venturi tube located above the backflow opening, negative pressure is formed around after airflow is sprayed out from the spraying opening at a high speed, and negative pressure suction carries dust-containing gas to enter the collecting cavity from the collecting opening. Then the air flow sequentially passes through the backflow opening and the backflow pipe to re-enter the acceleration channel; a traditional'single-stage acceleration-separation 'open-loop mode is broken through, a'kinetic energy recovery-secondary acceleration-enhanced separation' closed-loop system is constructed through countercurrent coupling of the Venturi tube and the cyclone separator, the closed-loop system completely isolates dusty gas from leaking out, and dual improvement of the energy utilization rate and the dust removal efficiency is achieved.

The invention discloses a process for converting biomass particles into synthesis gas by using pressurized bubbling fluidized bed equipment. The process comprises the following steps: feeding the biomass particles and fluidizing agent particles as raw materials into a gasification furnace; the gasification furnace comprises a fluidized bed area, a secondary gasification area and a post gasification area; a plurality of layers of gasification nozzles are designed in the gasification furnace, tar generated by biomass gasification can fully react in a high-temperature area of the gasification furnace, and synthesis gas generated by the pressurized bubbling fluidized bed gasification furnace enters a cyclone separator to be separated and then enters a synthesis gas cooler to be cooled; the cooled synthesis gas enters a synthesis gas filter, and the filtered synthesis gas enters a shock cooling system; the synthesis gas filtered by the synthesis gas filter enters a quench cooler of the quench system to be fully contacted with water for cooling and then enters a washing tower for washing, and the cooled and washed synthesis gas enters a downstream area; according to the invention, biomass ash fusion is reduced; and tar is reduced and eliminated.

The invention relates to the technical field of thermal power plant denitration, in particular to a thermal power plant SNCR (selective non-catalytic reduction) process based on CFD (computational fluid dynamics) simulation for building a physical geometric model of a cyclone separator, optimizing parameters such as injection flow, injection speed and nozzle distribution to realize optimal mixing uniformity and denitration efficiency, and determining that the optimal ammonia nitrogen ratio NSR of SNCR is equal to 1.25 when the SNCR reaction temperature is 972 DEG C; by simulating four injection source arrangement schemes, the optimal injection source position is determined, the optimal mixing uniformity and denitration efficiency and the lowest ammonia escape amount are achieved, the denitration efficiency of the optimized cyclone separator SNCR denitration system reaches 81.2%, emission of NOx in pellet flue gas is effectively reduced, pollution to the environment is effectively reduced through the optimized injection scheme, and the economic benefits of the cyclone separator SNCR denitration system are improved. And the optimal injection source position is determined, the actual engineering error value after transformation is smaller than 0.03, and the environment-friendly requirement for flue gas emission is met.