34results about How to "Reduce the amount of slurry" patented technology

The complex twisting device for air-jet eddyc-current spining to twist fiber strand consists of the upper twisting unit and the lowr twisting unit. Positive pressure air flow is utilized to produce eddy-current field and pipe flow and the fiber is fed to the eddy-current field via the conveying pipe. Fiber strand rotates with the high-speed rotating air flow while the pipe flow protects and guides the twisted fiber strand to leave from the eddy-current field. During the process, fiber strand is twisted to produce twisted yarn in high speed. The present invention makes it possible to produce high-quality yarn at low cost and high speed.

The present invention is fiber strand aggregating device for air slide, and its novel design is its aggregating roller with new splitting guide flute and porous aggregating flute. It is installed between the front jaw and the spinning section in the drawing area of spinnin frame, and the air slide fiber strand aggregating device and the front roller form one fiber jaw. By means of the additional aggregating air flows, one flow field for fiber inside the guide flute and the aggregating flute is provided. By means of splitting and guide of the guide flute and the aggregating flute and the aggregation of fiber strand in the aggregating flute, the fiber strand is twisted closely in the aggregating flute. The yarn of the present invention has improved axial parallel degree, decreased hairy feather amount outside the yarn and raised yarn strength.

The invention discloses a dual-circulation wet absorption tower. The tower comprises a front absorption tower and a main absorption tower, wherein the main absorption tower comprises a first fume inlet and a first fume outlet; the front absorption tower comprises a second fume inlet and a second fume outlet; an inter-tower fume passage is formed between the second fume outlet and the first fume inlet; the main absorption tower and the front absorption tower are both provided with circulating pumps capable of pumping the grout from a grout tank; and an outlet pipe and a spraying layer of the circulating pump are connected with each other. The dual-circulation absorption tower of the invention can effectively improve the desulfurization efficiency and increase the operation stability, is environmentally-friendly and energy-saving and can reduce the using amount of a chemical additive.

The invention provides a method for in-situ repairing of organic pollutant soil by a persulfate and hydrogen peroxide compounded system. Iron-containing mineral and sodium persulfate paste is firstlyinjected into the soil in an in-situ injecting manner; and then a hydrogen peroxide and natural small-molecular acid solution is injected, and organic pollutant removing is performed. The method is good in repairing effect, and has the beneficial effects that manual heating for activating persulfate is not needed, manual pH value adjusting is not needed, cost is saved, and no secondary pollution is generated. The problems that in the process that a traditional singular sodium persulfate oxidizing system and a singular Fenton oxidizing system perform in-situ oxidizing repairing on the soil, efficiency is low, cost is high, it is needed to add a pH adjusting agent, and secondary pollution is caused easily are solved.

The invention provides a method for preparing a manganese sulfate electrolyte by leaching pyrolusite through sulfur dioxide. According to the main concept, the method comprises the steps that only a part of an anolyte and whole-process pyrolusite are used for preparing a fluid, and after the fluid reacts with the sulfur dioxide, a high-concentration manganese sulfate solution is obtained; after the other part of the anolyte is neutralized and subjected to liquid-solid separation, a low-concentration manganese sulfate solution with the manganese sulfate concentration being identical to that ofthe prior anolyte is obtained; and the two manganese sulfate solutions are blended to obtain the qualified electrolyte with the manganese sulfate concentration meeting electrolysis requirements. By adopting the method, the utilization efficiency of the sulfur dioxide and the pyrolusite in the leaching process can be improved, and the capital construction cost and operation cost of a leaching technology and a leachate impurity removing technology are lowered.

The invention relates to a trepanning-adjustable flat silk screen. The trepanning-adjustable flat silk screen mainly solves the problems that a silk screen is not stable in structure and low in mechanical strength in an existing precision printing technology. The trepanning-adjustable flat silk screen comprises a flat silk screen body, and is characterized in that the flat silk screen body is of a faveolate structure formed by mutual connection between a polygonal array or a circular array; the silk screen area of the flat silk screen body is divided into a masking area and a plot area. An array unit structure of a local area is changed, the size of an array unit is adjusted, or the two methods are combined, so that the local trepanning rate of the flat silk screen is adjusted, the problem is well solved, and therefore the trepanning-adjustable flat silk screen and the screen printing plate comprising the same can be widely used in industrial production of precision printing.

The invention relates to a technological method for a drilling fluid solid control circulation system, in particular to a technological method for the treatment of drilling fluid produced during oil and gas drilling. The technological method for the drilling fluid solid control circulation system adopts the following device components: a special concentration treatment device I, a special centrifugal machine, an oil field mud pump I, a special cyclone set I, a special concentration treatment device II, an oil field mud pump II, a special cyclone set II, a special concentration treatment device III, an oil field mud pump III, a storage box, an oil field mud pump IV, a special filter press (or a special stacked spirals), a solid-phase mud cake collection barrel (or a mud transfer tank), and a circulating fluid storage tank. The technological method for the drilling fluid solid control circulation system has the following benefits: desanding, mud removal, destabilization and gel breaking in a circulating and classification manner are achieved through the two-stage special cyclone sets, so that the classifying effect is remarkable; circulating concentration is achieved through the three-stage special concentration treatment devices, so that the concentration effect is remarkable; the treated drilling fluid is recycled; treated solid-phase mud cakes or highly-concentrated mud are/is directly transported away.

The invention discloses a drilling filling pile construction method, and relates to the technical field of civil engineering. The drilling filling pile construction method comprises the following steps including the first step of construction preparing, the second step of pile position lofting, the third step of protection barrel burying, the fourth step of slurry preparing and storing, the fifthstep of drilling platform construction, the sixth step of drill bit type selecting and drill tool arrangement, the seventh step of drilling, the eighth step of hole forming checking, the ninth step ofprimary hole cleaning, the tenth step of reinforcement cage hoisting placing and positioning construction, the eleventh step of secondary hole cleaning and the twelfth step of underwater concrete pouring. According to the drilling filling pile construction method, a large-diameter ultra-long drilling filling pile and a construction method are adopted, the engineering problems that under complex work conditions, drilling filling pile drilling one-time hole forming difficulty is large, hole inclining is likely to happen, perpendicularity is hard to guarantee, a coverage layer is thick, slurry leakage is likely to happen, the hole collapsing risk is large, and efficiency is low can be effectively solved, and good technical, economic and social benefits are achieved.

The invention belongs to the technical field of coal slime flotation machines, and particularly relates to a flotation machine with high bubble surface flux and a particle bubble mineralization device. The particle bubble mineralization device comprises a mineralization device shell, a jet aerator and a slurry-gas mixer; the jet aerator and the slurry-gas mixer are arranged in the mineralization device shell, and the slurry-gas mixer comprises guide blades and protruding rods; the bubble mineralization efficiency of the particle bubble mineralization device is improved by arranging the slurry-gas mixer; the flotation machine comprises a separation barrel, a lower barrel body and a tailing chamber; a fluidization water chamber is arranged at the upper end of the separation barrel, the particle bubble mineralization device is arranged on the outer side of the separation barrel, and an inclined plate is arranged on the lower barrel body, so that the flotation machine can work under the conditions of high bubble surface flux and washing water flux, and no free foam layer flotation is achieved; an inclined plate channel is adopted at the lower end of the flotation machine to strengthen separation of mineralized bubbles and ore pulp, it is ensured that a foam area is maintained in a vertical area on the upper portion of the equipment, the lowest ore pulp amount is carried, and the separation effect is improved.

The invention discloses an asynchronous simultaneous separation process of poor and difficult-to-separate nickel-copper ore. A cyclone centrifugal separation beneficiation technology is adopted, a part of gangue and metal minerals with low nickel-copper grade and fine granularity and meeting secondary flotation conditions are separated in advance in an ore grinding loop before flotation of the low-grade poor and difficult-to-separate copper sulfide ore, and directly enter the secondary flotation, so that the recovery rate of nickel-copper metal and the concentrate quality are improved. According to the asynchronous simultaneous separation process of the poor and difficult-to-separate nickel-copper ore, a process for pre-grading an ore grinding product by utilizing centrifugal gravity ore beneficiation equipment is applied to the ore grinding loop of a copper-nickel ore beneficiation flow. The asynchronous simultaneous separation process of the poor and difficult-to-separate nickel-copper ore can improve the flotation operation efficiency of each section, reduces the process energy consumption, achieves the purpose of improving the final copper-nickel separation index, and is economical, applicable, simple and good in beneficiation effect.

The invention discloses recycled concrete and a preparation method thereof, and relates to the technical field of concrete. The technical key points are as follows: the raw materials comprise the following components in parts by weight: 280-300 kg/m < 3 > of cement; 70-90 kg/m < 3 > of fly ash; 800 to 820 kg/m < 3 > of sand; 790 to 810 kg/m < 3 > of glaze modified recycled coarse aggregate; 190-210 kg/m < 3 > of natural gravel; 8-10 kg/m < 3 > of an additive; and 155-165k kg/m < 3 > of water. The recycled concrete provided by the invention has the advantage of improving the slump and mechanical strength of recycled concrete.

The invention discloses a construction method for pouring concrete at the back of a tunnel-through steel pipe. The technical scheme is as follows: the construction method comprises preparatory work, pouring of first-stage concrete, pouring of second-stage concrete, grouting construction and preservative treatment. The construction method specifically comprises the following steps of mounting an exhaust pipe and a grouting pipe on the tops of annular layers of the tunnel-through steel pipe and a concrete pipe, and building walls at two ends of the annular layers to block the annular layers; forming a plurality of ash filling ports in the top end of the tunnel-through steel pipe; communicating pouring pipes to the ash filling ports, and starting pouring of the first-stage concrete; when theheight of the concrete is close to the height of the middle of the tunnel-through steel pipe, moving the pouring pipes to the next ash filling port for repeating the pouring step; mounting the pouringpipes again, and starting pouring of the second-stage concrete; during uniform and stable grout leakage of the next ash filling port, stopping pouring, and moving the pouring pipes to the next ash filling port to block the poured ash filling ports permanently; carrying out grouting to the grouting pipe to fill a top cavity fully; and carrying out preservative treatment on the ash filling ports. The construction method has the advantages that the poured self-sealed concrete is fuller and the slurry supplementing amount is reduced.