31results about How to "Low liquid content" patented technology

A liquid removal apparatus adapted to separate liquid from a composite slurry of liquid and solids. The apparatus includes a movable, permeable membrane having opposing first and second sides. A ‘loaded belt portion’ of the second side is configured to receive the slurry. A permeable membrane support system is configured to provide movable support for the loaded belt portion and includes a transport deck located in contact with the first side of the permeable membrane below the loaded belt portion. The liquid removal apparatus has a housing with a low-pressure chamber in sealing contact with the first side of the permeable membrane. A pressure conditioning system applies a differential pressure via the housing to generate a lower pressure on the first filter belt side than on the second side. The transport deck is located within the low pressure chamber.

According to the present invention, there is provided a wastewater processing apparatus and method comprising a rotating filter thickener (20) receiving and filtering a wastewater mixture and producing a first filtrate output and a first sludge output, a screw press thickener (24) receiving the first sludge output and forming a final sludge output and a second filtrate output, a dissolved air floatator (46) receiving the first filtrate output from the rotating filter thickener (20) and producing a first solid output and a third filtrate output. The wastewater processing apparatus and method further comprising a first conductor (10, 12, 29) for mixing incoming raw manure wastewater and the second filtrate output from the screw press thickener (24) to produce the wastewater mixture for input to the rotating filter thickener (20), and a second conductor (34) for branching off a part of the first filtrate output to a spray cleaner (38) for spraying the part of the first filtrate output onto the filtration disks (70) for their cleaning.

A solid-liquid separating apparatus is provided with: a separating roll which has a substantially cylindrical shape with a plurality of through holes, which penetrate between an inner surface and an outer surface in radial direction thereof, and is rotatable in circumferential direction thereof; and a pair of separating filter cloths which is endless belts capable of traveling in a rotation direction of the separating roll and are wound around the outer circumference of the separating roll so as to overlap each other, wherein a material supplied between the pair of filter cloths is squeezed by being rolled together with the pair of filter cloths therebetween on the outer circumference of the separating roll, and the material is dehydrated by ventilating via each through hole.

A method and apparatus for separating magnetic material from a slurry is disclosed, the method including the steps of providing a first moving surface, depositing the slurry onto the first moving surface, attracting at least a portion of the magnetic material of the slurry onto the first moving surface by first magnetic means, arranging the first moving surface such that liquid from the slurry is removed due to the portion of the magnetic material being attracted to the moving surface by the first magnetic means to form a magnetic material cake, separating an inner portion of the magnetic material cake from an outer portion of the magnetic material cake, with respect to the first moving surface, such that the inner portion has a lower liquid content than the outer portion.

The invention relates to a method for preparing calcium fluoride from fluorine-containing wastewater. The preparation method comprises the following steps: carrying out decomposition reaction on a calcium-containing raw material and a dissolution medium, carrying out carbonization conversion reaction on a calcium-containing solution obtained by the decomposition reaction and carbon dioxide, and mixing and reacting a calcium carbonate solid obtained by the carbonization conversion reaction with the fluorine-containing wastewater and an additive to obtain a calcium fluoride solid. According to the preparation method, a high-quality artificial fluorite product with controllable morphology, controllable granularity and controllable purity can be prepared, and the fluorine resource recovery rate can be increased to 90% or above; and in addition, the preparation method realizes efficient circulation of the medium and carbon dioxide, avoids the generation of fluorine-containing sludge, and has the advantages of mild process conditions, no special requirements on equipment materials and types, strong industrial operability and wide application range.

A rotation pressurization dehydrator adapted to locally increase the compressive force on moving dehydrated cake so as to efficiently reduce the liquid content of its region for which dehydration has not been sufficient by a conventional rotation pressurization dehydrator, whereby in discharged, dehydrated cake, the difference in liquid content among regions is made small. In a rotation pressurization dehydrator (3) which, as a raw material advances in an annular filter chamber (41) formed around a rotary shaft (32), gradually applies a pressure to the material to change the liquid material into cake, thereby dehydrating the material, projections (51) are disposed on the inner peripheral surface (34c) of an outer ring spacer (34) so as to further reduce the liquid content of the dehydrated cake.

A three-stage tubular T-shaped degassing device with microbubble axial flow and spiral flow fields is provided, which is applied to quick degassing of a gas-liquid two-phase flow. The three-stage tubular T-shaped degassing device adopts a quick degassing technology combining a microbubble uniform mixed rotational axial flow field and a spiral runner conical spiral flow field with layered jet collision reversing depth degassing. A microbubble uniform mixer is configured to adjust gas-liquid two-phase flow containing big bubbles into microbubble uniform mixed axial flow. A microbubble cyclone is configured to adjust the microbubble uniform mixed axial flow into multiple strands of rotational axial flows containing microbubbles. A rotational axial flow degasser implements the horizontal type microbubble uniform mixed multiple strands rotational axial flow degassing operation to remove most microbubbles to form axial flow gas and axial flow liquid.

The invention relates to a method for solid-liquid separation and dreg removal in the process of producing alumina, in particular to a full automatic on-line method for solid-liquid separation and dreg removal in alumina production. The method at least comprises a filtering process A, a filter mass discharging process B and a filter mass removing process C which are carried out repeatedly. A novel sintering net made of a filtering material is utilized to form a novel full automatic continuous type filter. A diluted serous fluid is pumped in from a feed port of the filter; and a material obtained from a discharge port of the filter is a fine solution meeting the requirement of aluminum hydroxide. The filter can realize continuous production by a single filter. The production process is wholly subjected to on-line monitoring; and a computer is used for providing the diluted serous fluid, the flow of the fine solution, the temperature, the solid content, the content of suspended matters and other main technical parameters for the whole production process of the alumina in real time. If equipment is subjected to proper parameter adjustment, the equipment can be conveniently used for the production process of molybdenum industry.

The invention provides a novel negative pressure slurry treatment system which comprises a rack, a belt type screen transmission device, a head box, a side box, a supporting frame, a micro-vibration device, a negative pressure diversion trench, a screen cleaning device and a driving device. The belt type screen transmission device comprises a screen, a rubber filtering support belt, a side leakage prevention apron board, a driving roller, a guide roller, a front roller support plate, a rear roller support plate and a tensioner; the head box comprises a feeding hole, an upper sealing cover, a shunting buffer tray and an observation window; the side box comprises a secondary filtering device and a gas filtering device; the micro-vibration device comprises a vibration rod, a damping spring, a pneumatic vibration exciter and a fixing rod; the negative pressure diversion trench comprises a negative pressure trench body and a liquid outlet; the driving device comprises a screen driving motor, a screen speed reducer, a mud scraping plate driving motor and a mud scraping plate speed reducer; rapid separation of slurry and rock debris particles is achieved through the micro-vibration device, the filtering device and the negative pressure system, the slurry treatment efficiency is improved, the cost is reduced, and environmental pollution is reduced.

The invention discloses a differential pressure type compressor gas lift wellhead pressure reduction device and a pressure reduction method applying the same, and belongs to the technical field of drainage gas recovery matching devices. A pressure reduction device channel of a pressure reduction device separation chamber of the wellhead pressure reduction device communicates with a gas inlet pipe,and a gas-liquid separation channel communicates with a gas outlet pipe; each flow guide unit is used for enabling the pressure reduction channel to communicate with the gas-liquid separation channeland used for carrying out step-by-step pressure reduction along the direction from the gas inlet pipe to the gas outlet pipe; each flow guide units at least comprises two flow guide channels, a slidevalve structure is arranged in the pressure reduction channel and used for pressure relief of the flow guide channels of each flow guide unit; a liquid discharge channel provided with a liquid discharge valve is arranged at the bottom of the gas-liquid separation channel and is used for discharging separated liquid; and the air inlet pipe and the air outlet pipe each are provided with a pressuredetection piece. The invention further discloses the compressor gas lift wellhead pressure reduction method applying the pressure reduction device. The wellhead pressure reduction device guarantees the continuous working duration of a compressor, the liquid drainage efficiency is improved, and the continuity of compressor gas lift measures is guaranteed.

The invention discloses a solid-liquid separation device, and relates to the technical field of solid-liquid separation. The solid-liquid separation device comprises fixed rings, floating rings, screw conveyors, a driving device and a filter cartridge; the filter cartridge comprises a plurality of fixed rings arranged at intervals in the axis direction and the floating rings arranged in gaps among the fixed rings; the screw conveyors are sleeved with the fixed rings and the floating rings; lead screw bearings and spiral blades arranged on the peripheries of the lead screw bearings are arranged in the screw conveyors; each lead screw bearing is provided with a conical part extending from the base end to the other end, a cylindrical part formed at the other end of the conical part and a miniature cylindrical part formed by extending from the base end of the conical part to one end; the conical parts arranged in the fixed rings and the floating rings form a concentration region; the cylindrical parts arranged in the fixed rings and the floating rings form a dehydration region; and in a barrel-shaped body formed by the fixed rings and the floating rings, by configuring the screws conveyor with the conical parts and the cylindrical parts, the liquid rate in solid can be reduced, and the solid removal rate can be improved.

The invention is applicable to the technical field of chemical equipment manufacturing, and provides a three-dimensional spiral double-effect vertical flash evaporator and a heat pump system with thesame. The flash evaporator comprises a shell, a gas outlet and a liquid outlet are formed in the two ends of the shell, the shell is connected with a gas-liquid two-phase inlet through a mounting hole, and the shell is of a three-dimensional spiral structure. The invention further provides the heat pump system with the flash evaporator. According to the flash evaporator and the system, the gas-liquid separation efficiency is high, the low liquid content of supplemented gas can be ensured along with the change of working conditions, the compression work of a compressor is saved, the efficiencyof the heat pump system is greatly improved, and the safety and the stability of the compressor are improved.

The invention relates to a comprehensive utilization method of fluosilicic acid-containing wastewater, which comprises the following steps: carrying out decomposition reaction on a calcium-containing raw material and a dissolution medium, carrying out carbonization conversion reaction on a calcium-containing solution obtained by the decomposition reaction and carbon dioxide, mixing a calcium carbonate solid obtained by the carbonization conversion reaction with silicon-removal fluorine-containing wastewater and an additive, and reacting to obtain calcium fluoride solids, wherein the fluosilicic acid-containing wastewater is mixed with a silicon-removal reaction medium, a silicon-removal reaction is carried out, and silicon-removal fluorine-containing wastewater and white carbon black are obtained through liquid-solid separation. According to the comprehensive utilization method, the calcium fluoride solid with controllable morphology, controllable granularity and controllable purity can be prepared, the purity of the calcium fluoride solid can be higher than 99.9%, white carbon black byproducts can be obtained, the comprehensive recovery rate of fluorine resources is increased to 90% or above, the technological conditions are mild, no special requirements for equipment materials and types exist, industrial operability is high, and the application range is wide.

The invention provides a sludge drying method and equipment. The method comprises the following steps: mixing liquid absorption particles with to-be-dried sludge slurry to obtain a mixture, and adsorbing liquid of the to-be-dried sludge slurry in the mixture by the liquid absorption particles; pressing the mixture, so that the liquid absorption particles are compressed and the liquid is discharged. According to the method, the liquid content of the dried sludge is reduced.