30results about How to "Fluidized state is good" patented technology

The invention discloses a catalytic cracking reactivator test simulation method. The method includes mixing a gas 1 and a gas 2 online to enter a reactor; allowing the catalyst in a reaction tube to be in a fluidizing state through the mixed gas; allowing the mixed gas to react with the catalyst; performing gas-solid separation on the reacted gas; metering and / or analyzing the separated gas. The fluidizing principle is utilized, on the set operation condition, the catalyst can be maintained in a fine fluidizing state in the reaction tube, the reactivating process for catalytic cracking of the catalyst to reactivate in the industrial state can be simulated effectively, and the important significance is provided for predicting and indicating the actual industry process.

The invention provides a fluidizing gas automatic regulating powder feeding device which comprises a powder bucket, a valve for controlling the input pressure and flow rate of fluidizing gas, a sensor used for monitoring the powder level in the powder bucket, a controller for controlling the actions of the valve according to the data of the sensor and alarm equipment; wherein, the sensor is electrically connected with the controller which is electrically connected with the valve and the alarm equipment. The controller controls the flow rate and the pressure of the fluidizing gas input by the valve according to the information of the height of the powder level obtained by the sensor, and dynamically regulates the height of the powder level in the powder bucket. When height of the powder level exceeds the upper limit or the lower limit preset by the controller, the controller drives the alarm equipment to give the alarm, so that the powder feeding device is avoided being damaged. According to the invention, full-automatic regulation of powder feeding can be realized, thus saving manpower and materials, reducing the consumption quantity of the fluidizing gas; in addition, the best fluidizing effect can be provided under the conditions of different powder levels.

The invention relates to the technical field of a nanometer material and provides a self-cleaning fluidized bed reactor for carbon nanotube production. The self-cleaning fluidized bed reactor comprises a fluidized bed reactor body with a reaction chamber and a rotating device arranged in the reaction chamber, wherein the rotating device comprises a rotating shaft and a rotator; the rotating shaft is longitudinally arranged along the center of the reaction chamber; the rotator is connected with the rotating shaft and is rotated under the driving of the rotating shaft; the reaction chamber is provided with a flow inlet and a flow outlet; the gas flows in through the flow inlet and flows out through the flow outlet; the rotating shaft is communicated with the flow inlet; the rotator is communicated with the rotating shaft; a plurality of gas holes are formed on the rotator; the gas holes are opposite to the inner wall of the reaction chamber and are communicated with the rotating shaft; gas flows out through the gas holes. In the self-cleaning fluidized bed reactor for carbon nanotube production, the rotator is rotated under the driving of the back-flushing acting force of the gas flow; when the rotator is rotated, the catalyst and the carbon nanotube adhered to the inner wall of the reaction chamber are cleaned by the rotator; the inner wall of the reaction chamber is washed by the gas sprayed from the gas holes; the carbon nanotube is prevented from being locally accumulated on the inner wall of the reaction chamber and accordingly causing the reduction of effective volume in the fluidized bed.

The invention provides a biological desulphurization processing reactor, a biological desulphurization processing system, and a processing method. The reactor comprises a three phase separator and a reaction zone. The reaction zone comprises an outer cylinder, a gas guiding cylinder and a lower flow guiding cylinder, such that the reaction zone is separated into an air-lift zone, an anoxic zone, and a descent zone. The three phase separator comprises an outer frustum, an inner inverted frustum, an outer sedimentation tank, an inner sedimentation tank, and an overflow groove, such that the three phase separator is separated into three sedimentation zones. Sulfide-containing wastewater is mixed with oxygen-containing water from the air-lift zone in the anoxic zone; under the effect of immobilized microorganisms, the sulfide is partially oxidized into elementary sulfur; the mixture is delivered through the three phase separator arranged above, such that the immobilized carrier is separated from a water phase and a gas phase, and sulfur particles flow out with water. According to the invention, with the structure of the reactor and the processing method, a good fluidized state is maintained, and the loss of the immobilized carrier is inhibited. The reactor, the system and the method are advantaged in high elementary sulfur production rate, good processing capacity, hydraulic load impact resistance, substrate load impact resistance, simple structure, and easy amplification.

The invention relates to a production method for polyurethane enveloped controlled release fertilizer. The production method comprises the following steps: preheating granulated fertilizer in a fluidized bed in a fluidizing state; atomizing liquid paraffin, and pretreating the surface of the granulated fertilizer; mixing polyatomic alcohol and isocyanate in a nozzle, atomizing the mixture fast, and spraying the mixture onto the surface of the granulated fertilizer; controlling material adding speeds to ensure that polyurethane reaction can be fulfilled fast; adding liquid paraffin and carrying out surface anti-sticking treatment after the filling of reaction materials. According to the invention, the fluidized bed is adopted as enveloping equipment, polyatomic alcohol and isocyanate are used for spraying and enveloping after being premixed, and the adding speeds are regulated in a matched manner, so that the whole enveloping reaction process is fast and continuous. The production method can improve the polyurethane enveloping efficiency to a relatively large extent, and ensure relatively stable and reliable quality of the enveloped fertilizer due to continuous reaction.

The invention relates to a method for increasing the forming speed of anaerobic ammonia oxidation granule sludge. The method comprises the steps that practical industrial wastewater with low C / N is taken as a culturing nutrient source of the anaerobic ammonia oxidation granule sludge, and the mass concentration ratio of NH4<+>-N to NO2<->-N of inflow water is controlled to be (1.05-1.42) to 1; a mixture of anaerobic sludge and livestock breeding faeces is taken as inoculated sludge, by means of the modes of changing the substrate concentration of the inflow water, shortening the hydraulic retention time, controlling the granule size, the granule sludge settling speed and MLVSS / MLSS of the anaerobic ammonia oxidation granule sludge and the like, a nitrogen load of anaerobic ammonia oxidation inflow water is changed, the retention and amplification problems of anaerobic ammonia oxidation bacteria can be effectively solved, and by means of granulation of anaerobic ammonia oxidation sludge, the influence of nitrogen removal efficiency dropping caused by environmental changes can be weakened to some extent.

The invention relates to a gas distribution plate for a vibrating fluidized bed. Including straight holes, ellipsoidal surface guide holes with chamfered angles and plate body; ellipsoidal curved surface guide holes with chamfered angles and straight holes are arranged alternately on the plate body. Each ellipsoid curved surface guide hole with a chamfered angle is provided with a straight hole on the opposite side of the hole opening direction; the distance from the straight hole to the opposite side of the hole opening direction from the same ellipsoid curved surface guide hole with a chamfered angle is less than the distance to the straight hole on the side of the hole opening direction . The straight holes are arranged in a triangular and rectangular way, and the arrangement of the guide holes on the ellipsoid surface with chamfered corners follows the arrangement of the straight holes. The use of this gas distribution plate makes the gas distribution more uniform; it can not only guide but also make the particles produce a good fluidized state, and can continue stably; reduce the force and probability of particles colliding with the distribution plate; the opening structure is not easy to block , damage, can reduce the number of dead zones in the bed; strengthen the disturbance of the gas phase near the surface of the gas distribution plate, so that the particles can fully contact with the hot air; the structure is simple and easy to manufacture.

The present invention relates to a biological carrier used in anaerobic and anoxic stages of sewage treatment. The biological carrier comprises high density polyethylene, calcium carbonate, stearic acid or stearate, carbonate, polyhydroxy fatty acid amide, trace elements, biological enzymes, an antioxidant, an ultraviolet absorber and a peroxide additive. The invention further provides a preparation method of the biological carrier. The carrier can realize a good fluidized state, has good hydrophilicity and a fast film forming speed, and can massively enrich hydrolyzed bacteria, denitrifying bacteria and anaerobic ammonium oxide bacteria, has high strength, high wear resistance and high extrusion resistance, can adapt to mechanical stirring in the anaerobic and anoxic stages, and has the advantages of good anti-aging and anti-ultraviolet radiation performances, strong biofilm adsorptivity, firmness in the formed film, and extremely high promotion values.

The present invention provides a solid molasses powder and a preparation method and a storage method thereof, and the method comprises pretreatment, fluidization granulation, cooling, grading, and, optionally, packaging, storage and other steps. The present invention also provides the solid molasses powder prepared by the method and corresponding use thereof.