42results about How to "Improve gas collection efficiency" patented technology

The invention discloses a method for producing one impregnating two calcining anode carbon blocks, which is on the basis of producing common anode carbon blocks and comprises following steps: selectively using calcined coke, adding a little antioxidant additive, preheating a common anode under the temperature of 280-330DEG C for 18-24 hours, then, hoisting in a high pressure impregnation tank, filling impregnating pitch whose temperature is 160-180DEG C under the vacuum pressure of 0.09-0.094MPa, pressurizing 1.55-1.6MPa, maintaining the pressure for 3-5 hours, hoisting out and cooling to normal temperature, then, calcining for 200-220 hours under the temperature condition that the maximum temperature is 800-900DEG C according to a heating curve, cooling, and then cleaning up to obtain a new one impregnating two calcining anode carbon block. Since the pitch is filled in an air vent of the anode, the mechanicalness and the physical and chemical properties of the anode carbon blocks are newly changed, the bulk density and the compressive strength are increased, the porosity is lowered, the resistivity is lowered, the activity of the binder coke and the activity of aggregate tend to be consistent, the speed of selective oxidation is lowered, the voltage drop of the anode carbon blocks is lowered, and the using period of the anode is prolonged.

The invention discloses a smoke discharging method of aluminum cell, especially to an intensified smoke discharging method by hood-open processing. The invention accomplishes air-breathing by using air-proof space, which is formed by catelectrode, groove shell, horizontal cover plate of superstructure and seal closure, slot space on anode surface mulch as static pressure cabinet, ventilating structure and intensified ventilating path. The invention can ventilate efficiently, increase gas-collecting efficiency and inhibit contaminant emitting.

The invention belongs to the nonferrous metal aluminum electrolysis technical field, in particular relating to a method for changing anodes of a prebaked anode cell provided with 28 groups of anodes 200kA. The method is characterized in that: 4 groups of anodes in the corner of the first row and the second row adopt single-anode replacement during the anode replacement operation, and 24 groups of anodes in the middle adopt double-pole combined replacement. Due to adoption of the replacement means of double-pole combined replacement, the frequency of anode replacement operation is greatly reduced, thereby the negative influence on the electrolytic cell is reduced; and then the energy consumption per ton aluminum and the production cost per ton aluminum are reduced. Simultaneously, the work efficiency is also improved; the gas collecting efficiency of the electrolytic cell is improved; and the discharge of harmful gas is reduced.

The invention discloses an aluminum electrolytic cell closed gas collecting device. At least two electrolytic chambers are formed inside an aluminum electrolytic cell through an anode and a cathode; the anode is a self-baking anode, and an anode paste discharging system is arranged above the anode; three groups of flue gas gathering pipelines are arranged on the aluminum electrolytic cell, the first-stage flue gas gathering pipeline directly communicates with an inner space of a cell body, the second-stage flue gas gathering pipeline extends to the position, above the anode, inside the cell body, and the third-stage flue gas gathering pipeline extends into the cell body and is in butt joint with an anode paste feeding port in the top of the self-baking anode through the anode paste discharging system; and the aluminum electrolytic cell is provided with a two layers of sealing structures including the outer sealing structure and the inner sealing structure. By means of the aluminum electrolytic cell closed gas collecting device, the centralized treatment and recovery of the exhaust gas and the waste heat generated by the aluminum electrolytic cell adopting the multiple continuous operation chambers are realized, the ultra-low controllable discharge of air pollutant in the electrolytic cell is realized, the heat preservation state of the electrolytic cell is improved, the heat loss of the electrolytic cell is reduced, and the energy efficiency level of the electrolytic cell is effectively increased.

The invention relates to the technical field of aluminum electrolysis, in particular to a method controlling a cell voltage of an electrolytic cell and a clamping frame position. The technical problems that an existing cell voltage and clamping frame position control method is not reasonable, operation for lifting a clamping frame is complicated, and efficiency is low are solved. A device in use comprises a clamping frame and at least one aluminum tube anode arranged in the clamping frame and internally provided with a plurality of conductors; the aluminum tube anode comprises an aluminum tubein which the plurality of conductors in contact with the aluminum tube are arranged; at least one anode lifting mechanism connected with the clamping frame and used for adjusting the cell voltage isfurther included; the clamping frame is provided with a plurality of first pressing mechanisms in contact with the aluminum tube; at least one detecting unit is arranged around the clamping frame, andthe detecting unit, the first pressing mechanisms and the anode lifting mechanism are all connected with the control system; and a cell voltage signal of the electrolytic cell is acquired and input into the control system.

The invention discloses an upper structure of a large scale aluminium cell, which comprises a cross beam (1), a vent stack (2), a positive bar (3), an anode carbon block group (4), an anode winding gear (5), a crust breaking charging device (6). The anode carbon block group (4) uses the binode structure; wherein, the binode structure of the anode carbon block group (4) is that an aluminum guide bar is connected with two carbon blocks (8) by eight steel claws (7); every four steel claws (7) are distributed to each carbon block (8). The eight steel claws (7) and one anode rod are welded into one whole. The anode winding gear (5) uses an end single motor for concentrating driving. The cross beam (1) uses the plate web girder structure. The vent stack is arranged below the cross beam (1). The positive bar (3) uses the split type structure. The web plate of the cross beam (1) is provided with a hole (9) which a balance busbar passes through. The anode has 40-56 pieces and is configured by the busbar with 5-7 dot large area incoming electricity.

The invention discloses a gas collecting method for a crown block in an electrolysis workshop, which is mainly used for collecting flue gas generated during the pole changing operation of the electrolysis workshop. A gas collecting device is added to the crown block, and comprises a telescopic pipeline and a dust collecting hood; a flue gas purifying system is added to a crown block beam, and comprises a hydrogen fluoride adsorption device, a dust collector, an induced draft fan and a regular discharging device which are connected in sequence; when the crown block clamps the residual pole, leaves a electrolyzer and moves to a residual pole cooling system, the dust collecting hood is placed on the side of the residual pole and always moves with the residual pole to collect the flue gas emitted by the residual pole; the flue gas emitted by the residual pole enters the telescopic pipeline through the dust collecting hood to enter the flue gas purifying system; the flue gas first enters the hydrogen fluoride adsorption device and then the dust collector, and the induced draft fan is used for meeting the requirements of the entire system for the air volume and the negative pressure; the purified flue gas is discharged to the atmosphere through the induced draft fan. According to the invention, fluoride and dust can be can collected and treated, so that the amount of unorganized emissions during the transfer of the residual pole can be reduced.

The invention discloses a rare earth modified nano coating glass plate self-cleaning gas collecting device, and belongs to the fields of atmospheric sciences and environmental sciences. The gas collecting device comprises a gas inlet pipe, a gas collector, a gas outlet pipe, a peristaltic pump, a gathered liquid tank, a feeding pipe, a liquid inlet peristaltic pump, a collected liquid tank, a discharging pipe and a liquid outlet peristaltic pump, wherein the gas inlet pipe is connected with a gas inlet of the gas collector; the gas outlet pipe is connected with a gas outlet of the gas collector; the peristaltic pump is connected with the gas outlet pipe; the gathered liquid tank is connected with a gathered liquid pipeline on the gas collector by virtue of the feeding pipe; and the collected liquid tank is connected with a collected liquid pipeline on the gas collector by virtue of the discharging pipe. The rare earth modified nano coating glass plate self-cleaning gas collecting device disclosed by the invention has the characteristics of being easy to operate, high in gas collection efficiency and the like, and the gas colleting device can be widely applied to the fields of monitoring and research of gaseous pollutants in weather and environment industries as well as occasions in which gaseous pollutants are required to be effectively and rapidly separated from particle components.

The invention discloses a high-efficiency internal circulation anaerobic bioreactor. The anaerobic bioreactor comprises a tank body. The tank body is equipped with a gas-liquid separator, an upper layer three-phase separator and a lower layer three-phase separator. The heights of the upper layer three-phase separator and the lower layer three-phase separator can be changed in the tank body. The upper layer three-phase separator and the gas-liquid separator are connected through a telescoping gas collection pipe. The lower layer three-phase separator and the gas-liquid separator are connected through a telescoping riser pipe. The upper layer three-phase separator and the lower layer three-phase separator are equipped with an upper layer gas collection hood and a lower layer gas collection hood respectively. The upper layer gas collection hood is composed of a plurality of upper layer gas collection units through laying. The lower layer gas collection hood is composed of a plurality of lower layer gas collection units through laying. The upper layer gas collection units and the lower layer gas collection units have a structure with an openmouthed lower end and composed of two inclined side plates. The upper part gradient of the inclined side plate is more than the lower part gradient. The internal circulation anaerobic bioreactor can raise the single-layer three-phase separator gas collection efficiency, the internal circulation speed can be adjusted to meet condition requirements of different water inlet speeds and the like, and operation is stable.

The invention provides a gas collecting and measuring device which comprises a detector, a gas supply device and a shell, an enrichment groove is formed in the shell, the detector is arranged in the shell and connected with the enrichment groove, and the gas supply device is installed in the shell and used for sending gas to be measured into the enrichment groove. The gas collecting and measuringdevice provided by the embodiment of the invention is good in gas collection effect and high in measurement precision.

The invention discloses an automatic temperature control device which comprises a fixing frame, a support is fixedly connected to the bottom of the fixing frame, a motor is arranged on the support, afirst shaft is fixedly connected to the top of the output shaft on the motor, and the surface of the first shaft penetrates through the lower surface of the fixing frame and is rotationally connectedwith the fixing frame. A fermentation bin is rotationally connected in the fixing frame in a limited mode, the first shaft penetrates through the lower surface of the fermentation bin and is fixedly connected with a sealing rotary disc, the lower surface of the sealing rotary disc is rotationally connected with the bottom of the inner wall of the fermentation bin in a limited mode, and a second shaft is fixedly connected to the circle center of the upper surface of the sealing rotary disc. Through cooperative use of the structures, the defects that in the actual use process, due to the fact that a traditional biogas digester does not have heat preservation or constant-temperature control equipment or heat storage equipment and the like, annual continuous and stable production of biogas isdifficult to achieve, the production efficiency is reduced, and inconvenience is brought to use are overcome.