87results about How to "Improve fluidization quality" patented technology

The invention relates to a method for vibrating, fluidizing and decomposing phosphogypsum. The method is characterized by comprising the following steps of: 1) pretreating the phosphogypsum; 2) preparing a composite additive; 3) uniformly mixing the composite additive and the phosphogypsum in a mass ratio of 1:7 to prepare a mixture; 4) preparing equipment; 5) reducing and decomposing, namely feeding the mixture into a uniform fluidizing decomposing furnace out of a kiln; heating to the temperature of between 850 DEG and 1,100 DEG C under the protection of Ar atmosphere; introducing CO at theflow rate of 5 to 50mL/min; making the volume flow ratio of the CO to the Ar to be 1:2-19; controlling the temperature to be between 850 and 1,100 DEG C; and starting a vibration energy loading device. The method has the characteristics of not easily agglomerated materials, high fluidizing quality, low fluidizing gas velocity, high SO2 concentration in tail gas, low dust content, low process energy consumption, contribution to industrial large-scale conduction production, and capability of reducing sulfuric acid production cost.

The invention discloses a solid particle player which is in a coaxial segmented sealing cylindrical structure and comprises a base plate, a spray nozzle, an acceleration section, a rectifying section, a fluidized section and a cover plate. A rectifying plate which is uniformly provided with millimeter grade through holes is fixedly arranged at the inner wall of the connected part of the acceleration section and the rectifying section; an air distribution plate which is uniformly provided with nano-grade gaps is fixedly arranged on the inner wall at the connection part of the rectifying section and the fluidized section; solid particles are stacked on the air distribution plate; a plurality of layers of fluidized substance outlets are machined at the positions in different heights at the upper side of the fluidized section; and an included angle of 15-50 degrees is formed between the axis of the fluidized substance outlets and the axis of the solid particle player. The solid particle player is formed by sintering metal powder; air current is diffused by the air distribution plate with nano-grade gaps so as to obtain the uniformly-distributed incoming current and avoid the wall-surface effect; and according to the distance among various sections and the opening mode of the air distribution plate and the side wall, the invention ensures enough flowing resistance, reduces the wall-surface effect due to the nonuniform air inlet speed and pressure distribution, overcomes the instability of focus fluidization and inhibits the abnormal phenomenon of channeling and slugging in a bed layer.

The present invention relates to chemical equipment technology. The large fluidized bed reactor consists of main bed, conic bed, internal finger-shaped tube heat-exchange member and gad distributor, and features the inner cone structure in the conic bed and sectional introduction of heat-exchange medium to the heat exchange pipe. Using the fluidized bed reactor of the present invention can regulate effectively the fluidizing cross-section area, improve fluidizing quality and realize industrial application easily.

The invention discloses a circulating fluidized bed catalytic combustion method for treating organic waste gas, and belongs to the field of environmental protection. The method comprises the followingsteps that A, the temperature of a raising pipe in a circulating fluidized bed catalytic combustion furnace is controlled within the set catalytic combustion temperature range; B, the organic waste gas to be treated is sent from a raising pipe intake manifold into the raising pipe, so that catalyst particles in the raising pipe are fluidized rapidly, and at the same time, VOCs components in the organic waste gas to be treated are catalyzed for oxidative decomposition; C, airflow after oxidative decomposition entrains part of the catalyst particles to move upwards into a separator, the catalyst particles are separated and return to the raising pipe through diplegs, and hot exhaust gas after purifying leaves the separator; and D, the hot exhaust gas after purifying enters a heat exchanger for exchanging heat to utilize exhaust gas heat, and the exhaust gas after heat exchange merges into an exhaust gas flue and is introduced into a factory exhaust manifold or exhausted into the atmosphere. The method is high in removal rate, simple in operation and high in heat utilization rate, and long-term continuous and stable operation of volatile organic waste gas can be achieved.

A process for modifying the surface of superfine paint particle in order to improve the flowability of paint particles for airflow delivery features that the airflow or external mechanical force is used to make small and hard additive particles collide or squeeze with paint particles. Part of additive particles is anchored on the surface of paint particle and other additive particle is adsorbed by its exposed rest. Its advantages are high effect, low cost, and simple operation.

The present invention discloses a system and a method for producing powdery vanadium by using a chlorination process. According to the present invention, through fluidized bed oxidative granulation treatment, the mineral phase reforming and the mineral particle growth of the vanadium residue are achieved; through calcium fixing treatment with carbon dioxide, the decalcification of the vanadium residue is achieved; the vanadium in the vanadium residue is converted into gaseous vanadium oxytrichloride through selective chlorination, and most of impurities such as iron, manganese, phosphorus, titanium, silicon and the like are remained in the chlorinated residue so as to effectively separate vanadium and other impurities; the gaseous vanadium oxytrichloride is sequentially subjected to dust removal, leaching, settlement, rectification purification, catalytic oxidation and other processes to prepare the high-purity vanadium pentoxide powder (powdery vanadium); the chlorinated residue is subjected to gas phase hydrolysis dechlorination treatment, and the dechlorination residue returns to iron making; and with the system and the method, the clean comprehensive utilization of vanadium residue is achieved while the sensible heat of the high temperature flue gas of the chlorination furnace is effectively utilized so as to achieve the purposes of energy saving and consumption reduction.

The invention discloses an air pulse dense-medium fluidized bed and a separation method therefore, which belongs to the field of dry-process mineral processing and is particularly suitable for dry-process coal preparation. The air pulse dense-medium fluidized bed and the separation method therefore comprise the prior air dense-medium fluidized-bed and the separation method thereof, and are characterized in that the upflow for the fluidization of a dense-medium bed is kept to be unsteady airflow that alternately changes in a period according to a certain law. When the fluidized bed and the separation method are adopted for separation, the aim that the fluidized bed is stable, easy to control, high in reliability, good in effects, capability of popularization and wide in adaptation range can be achieved, and the effects that can not be achieved by the prior air dense-medium fluidized-bed and the separation method thereof can be achieved. The method is a novel dry-process separation method in the mineral processing industry.

The present invention discloses a system and a method for producing high-purity vanadium pentoxide through clean chlorination of vanadium resources. According to the present invention, vanadium resources are subjected to granulation, oxidation, crushing, screening and other pretreatment processes, the pre-treated vanadium resources enter a chlorination furnace and are selectively chlorinated, thevanadium in the vanadium resources is converted into gaseous vanadium oxytrichloride, and most of impurities such as iron, chromium, calcium, phosphorus, manganese, titanium, silicon and the like in the vanadium resources are retained in the chlorinated residue so as to achieve the effective separation of vanadium and other impurities; the gaseous vanadium oxytrichloride is sequentially subjectedto dust removal, leaching, settlement, rectification purification, catalytic oxidation and other processes to prepare the high-purity vanadium pentoxide; the chlorinated residue is sequentially subjected to waste heat recovery, water washing dechlorination, settlement separation, filtering washing and other processes to obtain filter residue and a washing liquid, the filter residue returns to ironsmelting, and the washing liquid is subjected to evaporation crystallization to obtain a chlorine salt; and with the system and the method, the clean comprehensive utilization of vanadium resources is achieved while the sensible heat of the high temperature flue gas of the chlorination furnace and the high temperature chlorination residue is effectively utilized so as to achieve purposes of energy saving and consumption reduction.

The invention relates to a method for the ammoxidation synthesis of 2,4-dichlorobenzonitrile to mainly solve problems of bad fluidization quality and low yield, or low yield and high production cost after using a fixed bed existing in fluidized bed reactors in present production technologies. The method which adopts 2,4-dichlorotoluene, ammonia and air as raw materials comprises a step that the raw materials contact and react with a catalyst in a fluidized bed under conditions that the raw material ratio of the 2,4-dichlorotoluene to the ammonia to the air is 1:2-10:4-40, the reaction temperature is 300-500DEG C, the reaction pressure is 0.01-0.1Mpa and the catalyst load (WWH) is 0.03-0.1h<-1> to generate the 2,4-dichlorobenzonitrile. The method well solves the problems and can be used for the industrial production of the ammoxidation synthesis of the 2,4-dichlorobenzonitrile.

A fluidized-bed reactor is disclosed. A gas distributor is arranged between the lower conic body and gas predistributing chamber. The vertically arranged finger sleeve tube bank is symmetrically distributed above said distributor, and communicated with the heat exchanging medium inlet and outlet. The returned material and solid material feeding inlets are installed to said lower conic body. It has also the raw gas inlet, synthetic gas outlet, and heat exchanging medium inlet and outlet. Its advantage is the improved fluidizing quality.

The invention provides a device for cooperatively enhancing the fluidization of nanoparticles by a centrifugal field and a sound field. The device comprises a feeding hopper (1), an annular air inlet chamber (2), a centrifugal fluidized bed body (3), a stepping motor (4), a discharging hopper (5), a bed body supporting frame (6), a cloth bag dust collector (7), a sounder (8), a loudspeaker (9), an air outlet (10), an annular air distribution plate (11), an air inlet (12), an inner discharging hole (13), a sealing gasket (14) and a right-angle transmission gear box (15). According to the device provided by the invention, the fluidization of the nanoparticles is enhanced through the centrifugal field and the sound field, and abnormal fluidization phenomena including channeling, slugging even normal fluidization and the like of the nanoparticles in a fluidized bed can be effectively eliminated; an agglomeration-crushing process of particle agglomeration is enhanced and mixing between the particles is enhanced; the heat and mass transportation capability between the particles and a main body is improved; process application and amplification are easy to realize; the device has strong operation controllability and is stable to operate.

The invention relates to an aromatic hydrocarbon ammoxidation combined fluidized bed reaction device and an aromatic hydrocarbon ammoxidation combined fluidized bed reaction method. In the prior art,the heat regulation range in the reactor of the existing device is small, the heat collector cannot be repaired on line to keep production after being abraded, the ammonia ratio is large, the air ratio is large and the raw material utilization rate is low. A purpose of the invention is mainly to solve the problems in the prior art. The invention discloses an aromatic hydrocarbon ammoxidation combined fluidized bed reaction device and a reaction method thereof. According to the technical scheme, aromatic hydrocarbon/ammonia is vaporized and then enters a reactor together with air from a gas distribution chamber, an aromatic hydrocarbon ammoxidation reaction is carried out under the action of a catalyst, heat released in the reaction process is brought into an oxygen supply heat exchanger through the catalyst, efficient heat exchange is carried out under the action of a strong mixing member while catalyst lattice oxygen supplementing treatment is carried out, and then the low-temperaturehigh-lattice-oxygen catalyst circularly returns into the reactor to continuously participate in the aromatic hydrocarbon ammoxidation reaction. By adopting the technical scheme, the technical problems are well solved. The device and the method can be used in production of aromatic nitrile by aromatic ammonia oxidation.

The invention belongs to the technical field of extraction of silicon and aluminum elements by activating coal gangue, and particularly relates to a method for extracting silicon and aluminum by activating coal gangue through plasma ball milling and vibration fluidization calcination, wherein the method comprises the steps: firstly, carrying out plasma ball milling treatment on a mixture of coal gangue and solid alkali to achieve the purposes of fully mixing and refining the coal gangue; meanwhile, mechanical pre-activation of the coal gangue can be achieved, then the coal gangue is calcined in the mode that air is introduced into the coal gangue solid powder to achieve solid fluidization, activation of the coal gangue can be achieved at the temperature lower than the traditional static calcination temperature, energy consumption in the coal gangue activation process is effectively reduced, and filtering and separating are carried out to obtain a silicon-aluminum mixed solution. The activation effect achieved at the temperature lower than the traditional static calcination activation temperature can reach the traditional static activation level, and the dissolution rate of aluminum oxide and silicon oxide is ideal.

The invention discloses a two-tier fluidized bed comprising an upper part, a lower part, an air inlet and an air outlet. A distributing plate for holding material is transversely arranged in each of the upper part and the lower part. The air inlet is disposed on the sidewall of the lower part below the distributing plates. The air outlet is disposed above the upper part. A vortex guide plate is disposed at the air inlet. Each distributing plate is provided with air holes which are staggered. The vortex guide plate allows hot air, entering the bed, to be diverted along the vortex guide plate, and thus, the problem of uneven heating caused by direct blow of the hot air is avoided, heat utilization rate of the bed is increased and drying efficiency is good; the bed is simple in structure, convenient to mount, easy to maintain and cost saving.

The invention relates to a fluidized-bed reaction device and a fluidization reaction method for hydrogenation of nitrobenzene. The invention mainly aims to solve the problems of low gas-solid contactefficiency, large bubble size, low fluidization quality and the like in a fluidized bed. According to a technical scheme in the invention, at least one group of composite components are arranged in afluidized-bed reactor, so when gas and catalyst particles pass through the components, bubbles and particle clusters are broken, fluidization quality is effectively improved, and the above technical problems are well solved; and the device and the method can be applied to industrial production of gas-phase catalytic hydrogenation of nitrobenzene.

The invention discloses a fluidized bed reactor for producing trichlorosilane. The fluidized bed reactor comprises a reactor main body, wherein the reactor main body comprises a gas distribution section positioned at the lower part; the gas distribution section, a maintenance seal head, a reaction section and an expanding section are internally communicated with one another; the gas distribution section comprises a gas inlet pipeline, a gas distributor arranged in the gas inlet pipeline, and a silicon tetrachloride inlet and a hydrogen chloride inlet formed in the gas inlet pipeline; the reaction section comprises a gas reaction pipeline and a cooling water jacket coating the gas reaction pipeline; the expanding section comprises a gas synthesis pipeline and a synthesis gas outlet formed in the top of the gas synthesis pipeline; the maintenance seal head is connected with a material supply pipeline. The fluidized bed reactor for producing trichlorosilane, disclosed by the invention, can be used for improving the fluidized bed reactor, further removing potential safety hazards in the production process of trichlorosilane, improving the one-time conversion rate of hydrogen chloride, improving the production rate of trichlorosilane, and reducing the silicon consumption.