111results about How to "Reduce the amount of sediment" patented technology

A thick-walled seamless steel pipe for line pipe which has a high strength and improved toughness and corrosion resistance in spite of the thick wall and which is suitable for use as a riser and flow line has a chemical composition comprising, in mass percent, C: 0.02-0.08%, Si: at most 0.5%, Mn: 1.5-3.0%, Al: 0.001-0.10%, Mo: greater than 0.4%-1.2%, N: 0.002-0.015%, at least one of Ca and REM in a total amount of 0.0002-0.007%, and a remainder of Fe and impurities, with the impurities having the content of P: at most 0.05%, S: at most 0.005%, and O: at most 0.005%, the chemical composition satisfying the inequality: 0.8≦[Mn]×[Mo]≦2.6, wherein [Mn] and [Mo] are the numbers equivalent to the contents of Mn and Mo, respectively, in mass percent.

The invention discloses a low-resilience liquid accelerator for shotcrete and a preparation method thereof. The accelerator is prepared from the following raw materials in percent by mass: 20%-40% of sodium hydroxide, 25%-40% of aluminium hydroxide, 3%-10% of a synergist, 0.5%-2% of a setting accelerator, 0.003%-0.02% of a viscosity adjusting agent, and the balance water, wherein, the synergist is sodium silicate, the setting accelerator is an alcohol amine substance, and the viscosity adjusting agent is potassium chromate or sodium nitrite. The preparation method comprises the following technical steps: adding sodium hydroxide and the synergist into a reaction kettle, adding water, and starting an agitator and a heater; keeping the temperature after the temperature reaches a set temperature, adding aluminium hydroxide, and reacting with the constant temperature; adding the viscosity adjusting agent, stirring, heating, reacting with a constant temperature, then stopping heating, and naturally cooling; and adding the setting accelerator after the reaction system is cooled, and cooling to room temperature, so as to obtain the accelerator. The accelerator is short in setting time, low in resilience and moderate in viscosity, generates a little sediment, has good cement adaptability, and the preparation method for the accelerator is simple, practicable and energy-saving.

The invention relates to an acid cleaning and phosphorizing method of an electromobile frame, belonging to the technical field of metal surface treatment. The method comprises the following steps: (1) degreasing the metal frame; (2) cleaning with water; (3) immersing the metal frame in an acid cleaning solution to carry out acid cleaning; (4) flushing with water; (5) immersing in a surface conditioning tank to carry out surface conditioning; (6) immersing in a phosphorizing tank to carry out phosphorization and film formation; (7) cleaning in a clean water tank; and (8) drying in a phosphorizing line baking oven. The invention has the advantages of low technical difficulty, strong operability, simple technique, low deposit amount, high film formation speed, is simple and convenient for maintenance, greatly lowers the labor intensity of workers, and reduces the technical pollution; and the finally obtained grey phosphorized film has the advantages of uniform crystallization and moderate thickness, and greatly prolongs the service life of the electromobile metal frame.

The invention relates to a large-scale pig farm wastewater treatment method comprising anaerobic fermentation, filtering, regulating pool treatment, primary precipitation, anaerobic pool treatment, secondary precipitation, A/O pool treatment, precipitation of secondary sedimentation tank, flocculent precipitation treatment, final precipitation treatment and disinfecting tank treatment. The treatment method provided by the invention is simple in treatment procedures, low in treatment cost and strong in treatment ability, thereby being suitable for popularization and application of large-scale pig farm wastewater treatment.

The invention relates to ultralow-temperature welded alloy steel and the production method thereof. The production method sequentially comprises the following working procedures of: 1) smelting; 2) electroslag remelting; 3) forging; 4) steel rolling; and 5) drawing. The low-temperature impact performance of the ultralow-temperature welded alloy steel is similar to that of the austenitic stainless steel, and even under the welding state, the ultralow-temperature welded alloy steel still has enough high impact property at subzero 196 DEG C as well as good mechanical property and corrosion resistance in various corrosion media.

The invention discloses a low-temperature single-component zinc series phosphating solution and a preparation method thereof. The low-temperature single-component zinc series phosphating solution comprises the components of 5-9 g/L of zinc oxide, 12.5-30 g/L of phosphoric acid, 3-6.2 g/L of nitric acid, 0.3-1 g/L of nickel nitrate, 0.5-1.5 g/L of sodium m-nitrobenzenesulfonate, 1.5-2.5 g/L of sodium chlorate, 1-2.5 g/L of hydroxylamine sulphate, 1-2 g/L of citric acid, and the balance of water. According to the invention, sodium chlorate, hydroxylamine sulphate and sodium m-nitrobenzenesulfonate are used together as a compound accelerator, and the characteristics of the three accelerators are brought into full play, so that the prepared phosphating solution is stable, the sediment weight is light, and the performance of the phosphate film is good. The low-temperature single-component zinc series phosphating solution has the advantages of convenience in use, less difficulty in control technique, high speed of film formation, wide applications and simple preparation method.

This invention discloses an anti-rust phosphor solution formula of a metal and its technology method, the formula is composed of the following materials: XMn(H2PO4)2íñYfe(H2PO4).4H2O is 20-100g/lú¼Mn(NO3)2íñ6H2O is 20-100g/lú¼Zn(NO3)2íñ6H2O is 100-200g/lú¼Ni+2 is 0.5-10g/lú¼exterior active formula is 0.5-20g/l, water takes up 2/3 of the whole chemical, there also has some proper crap irons. The technology method as followsú‘Firsly, preparing solution by the formula; secondly, adjusting the acid proportion of the solution; thirdly, doing the pretreatment on the surface of the metal; fourthly, phosphating; fifthly, ost-treatment, oiling. The phosphor film crystal grain made in this invention is dense, symmetrical, the film is thin, the phosphor coating is symmetrical and dense, and the color is plentiful.

The present invention relates to a wine production process, especially relates to the production process of huadiao liquor with little sugar, the production process is: after soaking rice in the rice, steams rice, puts into the cylinder and ferments, the pot raises the unfiltered wine, after presseing out the liquor, lowers degree, adds the yeast, and blends after second fermentation blends and flavors, then filters, fries the liquor, then melts in jars, after attracting the liquor then filters, after the canning sterilization then pastes the sign, the packing goes into storage for the end product. This invention fermentation is complete, greatly reduced sugar and soaks output soaking, and adapted drink to the diabetes patient and the obese crowd, simultaneously reduces precipitation quantity, and lengthened the goods time.

The invention provides a preparation method of powerful loquat syrup. The preparation method comprises the following steps of adding water to the remaining 6 kinds of components including loquat leaves in a formula except menthol, performing decoction for two times, wherein the decoction time each time is 2 hours, combining decoction solutions, performing filtration, performing concentration, thenperforming centrifuging, decocting centrifugate, and then performing enrichment after concentration, so that effective components of the powerful loquat syrup are wholly increased. According to the technology of the preparation method disclosed by the invention, sediments in traditional Chinese medicine extracts are removed, so that 0.05% or above of removal rate can be achieved, the clarity of products is effectively guaranteed, the quality problem that a conventional powerful loquat syrup product generates a few precipitates during storage easily is solved, besides, the risk that the product produces microorganisms is greatly reduced, and the mouth feel of the product is better.

The invention relates to the technical field of occlusive pile construction, and discloses a reinforced and plain concrete pile matched occlusive pile construction method. A long spiral drilling machine and a rotary drilling bucket are included. The construction method comprises the following steps: (1) drilling through the long spiral drilling machine, to form a plain concrete hole; (2) lifting the drill while pouring concrete, to form a plain concrete pile; (3) repeating the step (1) and the step (2) to form a plurality of plain concrete piles which are arranged at intervals; (4) drilling through a rotary excavating drilling bucket, and performing hard cutting on adjacent plain concrete piles and soil bodies, to form a reinforced concrete hole; (5) putting a reinforcement cage down to the reinforced concrete hole; (6) pouring concrete into the reinforced concrete hole, to form a reinforced concrete piles; and (7) repeating the steps (4)-(7), and arranging the reinforced concrete piles and the plain concrete piles in a one-to-one corresponding occlusion manner. The sediment amount at the bottom of the plain concrete hole is reduced, collapse of the wall of the plain concrete holeand falling of orifice soil are avoided, the pile body quality is improved, repeated drill bit replacement is not needed, and the construction efficiency is improved; and under the cooperation of thereinforced concrete piles and the plain concrete piles, the waterproof effect of the support structure formed by construction is enhanced.

The invention discloses an efficient and deep treatment process for high-concentration waste water in a natural gas industry. High-concentration industrial wastewater is subjected to physicochemical pretreatment to improve the biodegradability of the wastewater, and toxic and harmful substances in the wastewater are eliminated simultaneously, medium and low-concentration gas-field wastewater and domestic wastewater are mixed, and biochemical treatment is performed, accordingly, the biochemical treatment efficiency is improved, poison and impact resistances of a system are enhanced, and the denitrification function is strengthened. The technological process is simple, the operation is stable, the removal rate is high, investments and operation costs are saved, the process can be fully applied to treat industrial wastewater of various gas fields, and discharged water can achieve environment friendly emission standards required by the country.

The invention relates to a circulating system for PAM-containing tailing wastewater treatment. The circulating system comprises a tailing wastewater regulating tank, an ozone oxidation device, a coagulation-flocculation reaction tank and a physical filtering device which are sequentially connected and communicated, and further comprises a control unit and a viscosimeter, wherein a pipe for purified water obtained after filtration of the physical filtering device is connected with an ore sorting water inlet; ozone and wastewater are mixed at the ozone oxidation device; the coagulation-flocculation reaction tank is connected with an externally-connected PAC and PAM adding channel for flocculating PAM; the viscosimeter monitors the wastewater viscosity at the front end of the ozone oxidation device in real time; the control unit is electrically connected with an ozone supply flow control valve on the ozone oxidation device and the viscosimeter respectively. According to the characteristic that ore wastewater has relatively large turbidity, a viscometer is skillfully used for monitoring the viscosity of the wastewater before ozone oxidation real time, the viscosity is fed back to the control unit, and hereby the control unit controls the ozone supply flow in real time, so that an optimal effect is achieved.

A fuel injector includes an injector body forming an actuator portion. An actuator bore is formed in the actuator portion and is at least partially defined by an inner surface and by an end surface. An actuator disposed in the actuator bore and has an outer surface such that a flow channel can be defined between the inner surface of the actuator bore and the outer surface of the actuator. A cooling flow passage is formed in the injector body, in fluid communication with the actuator bore, and is adapted to supply cooling fluid to the actuator bore. A drain passage is formed in the injector body, in fluid communication with the actuator bore. An internal cooling fluid flow path extends from the cooling flow passage, through the flow channel, and from the flow channel through the drain passage.

The invention provides a method for treating acidic wastewater with high arsenic content by using nano TiO2 and recycling arsenic, comprising the following steps of: adjusting the pH value of the wastewater to 5 by using lime milk, and separating the wastewater into a solid and liquid; continuously absorbing a solution with high arsenic content three times by using a nano TiO2 adsorbent, and adjusting the pH value to 7. The adsorbent can be recycled through the elution and regeneration of sodium hydroxide. Meanwhile, arsenic in backwash liquor is recycled through adding calcium oxide. According to the method, trivalent arsenic and heavy metal ions in the wastewater can be effectively removed, the adsorbent can be recycled, almost no waste residues are generated, and meanwhile, the arsenic can be recycled so that the pollution to the environment is reduced and economic benefits are obtained.

The invention provides a water and soil conservation ecological service function evaluation method. The method comprises the steps of: obtaining basic ecological indexes related to the water and soilconservation measure ecological service function of a drainage basin, and assigning a weight to each basic ecological index; and scoring the value of each basic ecological index, wherein the basic ecological indexes comprise indexes related to sediment loss, indexes related to runoff regulation and control in rainy seasons and indexes related to runoff regulation and control in dry seasons, and optionally comprise indexes related to forest product provision. The method is particularly suitable for evaluating the water and soil conservation measure ecological service function of the southern red soil hilly area small watershed, and therefore the current situation of the water and soil conservation measure ecological service function of the small watershed can be evaluated according to actual basic ecological indexes.

The invention discloses improvement on a rainwater drainage ditch. The rainwater drainage ditch is characterized in that a ditch-type rainwater channel consists of two homodromous reversed trapezoid trenches of different sizes, the two homodromous reversed trapezoid trenches are communicated with each other, the large homodromous reversed trapezoid trench is arranged on the upper part, and the small homodromous reversed trapezoid trench is arranged on the lower part. A water excess section is a reversed trapezoid of which the cross section is linearly increased according to the change of the height, and a section combined with two reversed trapezoids of which the upper parts are large and the lower parts are small is adopted, so that a large amount of rainwater and a small amount of rainwater can be drained separately; due to water drainage through the reversed trapezoid of which the lower part is small, the water drainage section is relatively small when the rainwater amount is small; therefore, the water drainage flow speed can be increased; by the enough water drainage flow speed, accumulation of pollutants in the rainwater ditch can be reduced; when the rainwater amount is small, the probability and amount of sludge deposition are reduced, and the self-cleaning capacity of the rainwater ditch is improved; moreover, due to the lower small section, the water consumption for flushing the sludge is reduced; meanwhile, the upper large section and the section are linearly increased along with the increase of a water level, so that the requirement on quick water drainage in a heavy rainstorm within short time can be met; and the shortcomings of the rainwater drainage ditch in the prior art are completely overcome.

The invention discloses wet crushing equipment capable of effectively preventing precipitation. The equipment comprises a machine base and a main kettle body, the main kettle body is arranged above the machine base through a kettle body mounting supporting column on one side of the machine base, a shearing system is arranged in the main kettle body, and the machine base is of a cuboid cavity structure. A motor is fixedly arranged on one side of the table board of the machine base through a motor installation base, an output shaft of the motor penetrates through the top face of the machine base and is arranged in a cavity of the machine base, a driving belt wheel is fixedly arranged on the output shaft of the motor, and the motor drives the driving belt wheel to start to operate after being started, and the driving belt wheel transmits power to a driven belt wheel in a belt transmission mode. The driven belt wheel drives a transmission shaft to rotate, the transmission shaft drives a rotor, a first fly-cutter and a second fly-cutter to rotate at a high speed, a high-vacuum area is formed in the area near the stator and the rotor, therefore, surrounding materials are sucked in, the materials are sheared by the shearing system, uniform suspension liquid is formed, and the operability of different materials is greatly improved.