36results about How to "Avoid sediment" patented technology

A method is disclosed for hydroprocessing a heavy hydrocarbon oil, comprising a first hydroprocessing step of bringing a heavy hydrocarbon oil into contact with a Catalyst (1) with a certain specific surface area and pore size distribution in the presence of hydrogen in a first reaction zone containing the Catalyst (1), and a second hydroprocessing step of bringing the hydroprocessed oil obtained from the first reaction zone into contact with a Catalyst (2) with a certain specific surface area and pore size distribution in the presence of hydrogen in a second reaction zone containing the Catalyst (2). The method is an improvement in decreasing or inhibiting the sediment formation, while highly hydroprocessing a heavy hydrocarbon oil containing a large amount of impurities such as sulfur, micro carbon residue (MCR), metals, nitrogen and asphaltene, especially a heavy oil containing a large amount of heavy vacuum residue, to adequately remove the impurities.

A connection-pipe sediment prevention device and method. In said connection-pipe sediment prevention device, at least a pressuring element is disposed at an opening of a pipe body of said connection-pipe, and a controller controls reciprocal movements of said pressuring elements, to make suspension liquid to flow in said connection-pipe and not to produce sediment. A nozzle is provided at bottom of said connection-pipe, to spray out said suspension liquid. Said connection-pipe sediment prevention method utilizes same means to make powder distribute evenly in said suspension liquid, so that said suspension liquid is sprayed out evenly from said nozzle. A connection-pipe principle is used, such that said suspension liquid having insoluble powder will not produce sediment, in achieving uniform spray. In addition, it is not required to put in large amount of powder and liquid at one time, thus saving production cost.

The invention relates to an integrated belowground vault with filter catch basin, that allows the runoff water to enter into a belowground two-part vault passing through a commercially available replaceable filter before being transferred out to the sewer, Rood control system or out through a French drain consisting of a cavity below the device that is filled with drain gravel. A layer of filter cloth can optionally be placed over the drain gravel. This device will be manufactured in variety of sizes and shapes and made from several different materials. The device has the unique ability of being capable of filtering low flow water runoff while allowing high volume to pass through with the added benefit of not retaining water that can become a mosquito breeding ground.

The invention discloses a construction method of a gravel grouting pile. The construction method comprises the following steps: (1) preparing for construction, (2) conducting measurement, paying off and positioning of the pile, (3) embedding a protective canister, (4) placing a drilling machine in place, (5) forming a hole by drilling, (6) cleaning the hole at a time, (7) placing a grouting pipe, (8) placing an anchor bar, (9) putting gravels in the hole, (10) installing a pile cap connecting steel pipe, (11) cleaning the hole, (12) conducting pressure grouting, (13) pulling the grouting pipe out, (14) constructing a pile cap, and (15) conducting detection and acceptance inspection on the finished pile. According to the construction method of the gravel grouting pile, the construction speed is high, the construction period is shortened, and compared with soft foundation treatment such as a prestressed pipe pile and a Y-type pile, the engineering investment is saved; the labor intensity is low, the construction is safe, and the construction method can be widely popularized and used; the gravel pile formed by cement and gravels is high in integrality and stability. The engineering drilling machine is adopted in a soft foundation to drill the hole in a rotating and cycling mode to form the pile, the disturbance to the foundation and the surrounding buildings is small, ground depression is controlled, and the construction method is small in vibration and low in noise during the construction and has good social benefits.

This invention relates to a method for separating and purifying 1,3-dihydroxypropane from microbial fermentation liquor, comprising: after the sterilization and dehydration of fermentation liquor, add in 1-pentanol or isoamyl alcohol, n-butanol and n-hexanol, then remove the sediment in the fermentation liquor by filtration or settlement followed by washing; add in appropriate amount of glycerol or 1,4-butylene glycol to the supernatant to recover 1-pentanol or isoamyl alcohol, n-butanol and n-hexanol, by decompression or normal pressure distillation, so as to produce high-purity 1,3-dihydroxypropane, with more than 95% recovering rate. This invention is characterized of simple separation process, mature technique, low separation cost, and little additional introduced agent with easy recovery. Besides, the crystallization sediment in the fermentation liquor can be efficiently separated, which overcomes the problems of foaming, agglomerating and pipe clogging during distillation, so as to realize continuous operation.

The invention relates to an integrated belowground vault with filter catch basin, that allows the runoff water to enter into a belowground two-part vault passing through a commercially available replaceable filter before being transferred out to the sewer, flood control system or out through a French drain consisting of a cavity below the device that is filled with drain gravel. A layer of filter cloth can optionally be placed over the drain gravel. This device will be manufactured in variety of sizes and shapes and made from several different materials. The device has the unique ability of being capable of filtering low flow water runoff while allowing high volume to pass through with the added benefit of not retaining water that can become a mosquito breeding ground.

The invention relates to an automobile gasoline composite modifying agent. The raw material of the modifying agent is prepared from the following components in percentage by weight: 25-50% of an octane value promoter, 30-50% of a combustion improver and 20-25% of a latent solvent, wherein the octane value promoter comprises the following components in percentage by weight: 20-45% of sec-butyl acetate, 30-40% of diisopropyl ether, 5-10% of absolute ethyl alcohol and 20-30% of methyl tert-butyl ether; the combustion improver comprises the following components in percentage by weight: 10-20% of cyclopentane, 47-50% of mixed light arene, 30-40% of alkylate and 3-6% of 1# jet fuel; and the latent solvent comprises the following components in percentage by weight: 10-30% of acetone, 25-30% of dimethoxy ethane, 20-25% of industrial isobutyl alcohol, 22.5-28% of industrial isopropyl alcohol, 1-4% of trinitromethane, 1-2% of glycol ethylene ether, 0.1-0.2% of a clearing agent polyisobutene succinimide, 0.2-0.4% of a metal deactivator T1201 and 0.2-0.4% of an antioxidant. By adopting the automobile gasoline composite modifying agent, a three-way catalyst of an organic ashless exhaust system cannot be poisoned, a fuel spray nozzle and a cylinder exhaust valve cannot be abraded, and carbon deposition and abrasive particles cannot be generated in a machine body.

Heavy oil or crude oil spills in sea water are recovered without polluting environment. A natural rubber latex and a coagulant are scattered around lumps of oil spills to coagulate the latex with the coagulant, so that a membrane of the latex is formed around the oil lumps.

The invention discloses a normal / low-temperature chemical conversion solution for 35CrMnSi steel and a preparing method thereof. The conversion solution consists of the following components in percents by weight: 10-30% of nitric acid, 5-15% of phosphoric acid, 15-25% of zinc oxide, 1-5% of iron powder, 5-10% of a compound accelerant and the balance of water, wherein the compound accelerant is prepared from citric acid and chlorate. The preparing method comprises the following steps: (1), dissolving the zinc oxide in the nitric acid and the phosphoric acid; (2), then, adding the compound accelerant, and after fully dissolving, adding the water; and (3), adding the iron powder into a solution obtained in step (2), taking out the iron powder after curing, and regulating the pH value to 2.0 to 3.0. The normal / low-temperature chemical conversion solution for 35CrMnSi steel does not contain toxic components, the use method is simple and is easy to operate, energy consumption and production cost are low, one layer of even and dense conversion film consisting of 2-5mum flaky zinc phosphate crystals can be formed on the surface of a base body, and the corrosion resistance is great.

The invention belongs to the technical field of biogas production, and discloses a method and equipment for producing biogas through anaerobic fermentation of biomass. The equipment includes a fermentation tank; a screw feeding device and a gas-liquid separator are installed on the top of the fermentation tank, and a dehydration discharging device is installed at the bottom; a heating material-guiding base and a multi-angle agitator are successively installed inside the fermentation tank from bottom to top; the top of the multi-angle agitator is successively connected to a decelerator and an agitator motor; and the decelerator and the agitator motor are fixed between the screw feeding device and the gas-liquid separator on the top of the fermentation tank. Thus, based on the arrangement ofthe multi-angle agitator, continuous stirring without dead angles can be carried out during overall anaerobic fermentation, so that raw materials in the fermentation tank can be fully mixed, and phenomenon such as sediment and scum during fermentation can be effectively avoided; and therefore, the conversion efficiency of biogas and the stability of the overall operation of the equipment can be enhanced, and the problems of equipment blocking can be avoided as well.

Apparatus for the plasma treatment of surfaces (2) with a first electrode (4) and a second electrode (7) and an alternating voltage source (6) between the first electrode (4) and the second electrode (7), and an electrical field, forming at least between the first electrode (4) and the second electrode (7), an effective area (9), which is arranged in front of the first electrode (4) and in which the surface (2) to be treated can be positioned, and the second electrode (7) is arranged closer to the effective area (9) than the first electrode (4), characterized in that at least one process gas channel (3) for at least one stream of process gas with at least one outlet (5) at the first electrode (4) is provided and the at least one outlet (5) points in the direction of the effective area (9); and the at least one stream of process gas impinges on the electrical field and the electrical field converts the at least one stream of process gas into a stream of plasma and the stream of plasma impinges on the effective area (9).

A facility on the paper making machine modulates the quantitative transverse distribution of the diluted water at the stock discharge box for paper making or plate making, includes a machine width entering chamber including a paper pulp stream cross flow distributor, a diluted water cross flow distributor and a stock discharge box; the paper pulp stream cross flow distributor is connected to n cross section volume stream supply channel that can be divided by 2, wherein two of which are respectively connected to a mixing device; at an export side, each mixing device has a mixing cross section volume stream discharging pipe connected to entering chamber; the flow resistances respectively connected to the cross section volume stream supply channel of mixing device are about equally to each other, and are smaller than the flow resistance of the mixed cross section volume stream discharged tube; the diluted water cross flow distributor has n / 2 diluted water supply channels; each mixing device has a centre hole, for mounting diluted water supply channels with controllable input variable at various instances, and is arranged between two cross section volume stream supply channel; a valve for passing diluted water with controllable input variable is provided at the centre hole of each mixing device.

The invention provides an efficient stirring device for aviation fuel oil, belongs to the technical field of aviation fuel production, and effectively solves the problems that in the aviation fuel production process, stirring of an additive and fuel is not uniform, the efficiency is low, and precipitates are likely to be generated. According to the technical scheme, the efficient aviation fuel oil stirring device comprises a stirring barrel, an inner rotating frame and an outer rotating frame are arranged in the stirring barrel, the inner rotating frame and the outer rotating frame are connected with a driving mechanism and are both provided with main stirring blades, and the interior of the stirring barrel communicates with the output end of an additive guide pipe; a pre-stirring mechanism is arranged close to the lower part of the output end of the additive guide pipe, is arranged on the inner rotating frame and is matched with the inner rotating frame to rotate. The stirring device has the beneficial effect that the stirring device capable of efficiently and fully stirring aviation fuel and additives to prevent precipitates from being generated is provided.

The present invention provides a spring tube type flexible micro chemical reactor. It comprises a reactor body, a thermal control device, and a gas generating device. The spring tube type flexible micro chemical reactor enhances the heat and mass transfer using the scroll spring tube, which is able to achieve accurate mixing and dynamic adjustment of the heat and mass transfer and is able to effectively solve the problems of blocking of channels by solid reactant, the poor portability of the reaction, etc.

The invention discloses a honey beverage. The honey beverage comprises the following components in percentage by weight: 82-86% of purified water, 6-10% of honey, 2-3% of maltose, 1-3% of menthol, 0.5-1% of aspartame, 0.5-1% of edible essence, 0.5-1% of sodium carboxymethyl cellulose and 0.5-1% of table salt. Compared with the prior art, the honey beverage achieves the technical beneficial effects: the honey beverage can better avoid precipitate appearing in the beverage, ensures the quality of the honey beverage and improves the quality of the honey beverage. In addition, the honey beverage contains rich nutrient elements, has high nutritional value and good mouthfeel, and better meets the requirements of people for honey beverages.

The invention discloses a preparation method of enzymolysis buckwheat flour in the technical field of buckwheat processing. The preparation method comprises the following steps: step 1, preparing following raw materials in parts by weight: 10-30 parts of buckwheat flour, 0.01-0.03 part of beta-amylase, 0.01-0.03 part of lactic acid, 0.01-0.03 part of hydrochloric acid, 0.01-0.03 part of sodium hydroxide, 0.2-0.6 part of 3,5-dinitrosalicylic acid and 0.2-0.6 part of glucose; 2, mixing the buckwheat flour with water, and performing fine grinding and stirring to form slurry; step 3, cooking a slurry mixture; and step 4, stopping heating, adding the the beta-amylase, the lactic acid, the hydrochloric acid and the sodium hydroxide, and performing stirring so as to obtain the pasty enzymolysis buckwheat flour. According to the application, the buckwheat flour is subjected to enzymolysis by selecting an optimal scheme, and the buckwheat flour subjected to the enzymolysis is added into a beverage, so that the problem that jelly and precipitate appear in buckwheat flour in an existing beverage is effectively prevented, and the storage time is prolonged.

The invention discloses an environment-friendly leather bag with high smoothness and a manufacturing method of the environment-friendly leather bag. The environment-friendly leather bag comprises softened leather, emulsion added oil, a tanning agent and a complexing agent and further comprises dye and water. The environment-friendly leather bag comprises, by mass percent, 100 parts of the softenedleather, 1-2 parts of the emulsion added oil, 10-20 parts of the tanning agent, 1-5 parts of the complexing agent, 5-10 parts of the dye and 10,000-15,000 parts of the water. The three edges of two pieces of same leather dried in the fifth step are sewn, and a zipper is sewn on the other side. The method is simple, one or more of acrylic resin, a polyurethane resin tanning agent, an amino resin synthetic tanning agent and an aromatic synthetic tanning agent are adopted as the tanning agent instead of the tanning agent containing the chromium element, and the leather is more comfortable, morehealth, greener, more ecological and more environment-friendly.

The invention relates to a method for preventing the formation of urea-based deposits in an exhaust duct 1 of an internal combustion engine 2. The method comprises identifying a region (S1) of the exhaust duct 1 at risk of urea-based deposit formation, determining a degree of spatial resolution of the risk of urea-based deposit formation in the identified region (S2), and applying a coating 3 formed for catalytically decomposing an aqueous urea solution and / or urea-based deposits to the identified region (S3) according to the determined degree. Furthermore, an exhaust duct 1 for an internal combustion engine 2 has a coating 3, which is configured for catalytically decomposing urea-based deposits, in the region of the exhaust duct 1 at risk of urea-based deposit formation, the coating 3 having a varying layer thickness 4 and / or varying composition.

The invention relates to a lubricating oil additive and particularly relates to an anti-wear and friction-inducing agent used in lubricating oil. The anti-wear and friction-inducing agent used in lubricating oil is prepared from sulfurized alkylphenol, alkyl salicylate, maleic anhydride, acrylic acid higher alcohol ester, polyisobutylene amine, tetrahydrofurfuryl nitrate, alkyl naphthalene and polymethacrylate according to a specific ratio. By the anti-wear and friction-inducing agent, the deposits generated during the application of the lubricating oil can be effectively prevented, the anti-wear and friction-inducing agent has excellent wear resistance, friction modification and corrosion resistance and when the anti-wear and friction-inducing agent, which is disclosed by the invention, is applied in the lubricating oil according to the amount of 200-600ppm, the fuel consumption of the motor vehicle can be decreased, the noise can be reduced, the exhaust gas emission can meet the standard and the service life of the entire motor vehicle can be prolonged.

The invention provides a concentric hoisting method for a T-shaped reinforcement cage with diaphragm walls. According to the technical scheme, a concentric hoisting device comprises a main hoisting rope and an auxiliary hoisting rope, wherein four hoisting fasteners are arranged on two sides of the main hoisting rope; the two hoisting fasteners are arranged on the left side of the main hoisting rope; the other two hoisting fasteners are arranged on the right side of the main hoisting rope; two control fasteners are arranged in the center of the main hoisting rope; the auxiliary hoisting rope is provided with a hoisting fastener; the hoisting fasteners of the main hoisting rope are hoisting ropes tied on wing walls; the control fasteners are hoisting ropes tied on an abdominal wall; the hoisting fasteners are stressed simultaneously, but the control fasteners are not stressed; and after the main hoisting rope overturns until the control fasteners are stressed, the reinforcement cage is vertical. By the technical scheme, the main hoisting rope is only provided with the two control fasteners, and the economic input is low. The concentric hoisting device is easy to operate; and after the reinforcement cage is hoisted, a cage body is vertical, so that the reinforcement cage enters a groove conveniently, walls of the groove are prevented from being scratched by the cage body, sediments on the bottom of the groove are avoided, secondary slag removal is avoided, the engineering quality is ensured, extra objects are not required to be hoisted, the hoisting device only needs to meet requirements on hoisting of the reinforcement cage, the cost is low, and the economic benefit is high.

The invention relates to an injection valve for four-stroke engine. The injection valve is capable of stopping un-injected fuels from flowing reversely towards a first fuel chamber and a fuel supply flow path with reliability. When volume of an oil injection nozzle pressure chamber can be reduced, fuels can be stably injected to injection holes.

The invention relates to a method for continuously producing melamine from urea by means of a fluidized bed reactor, wherein process gas conducted in the process circuit is used as the fluidizing gas, and wherein the temperature of the process gas at the inlet of the conveying element for the fluidizing gas is adjusted by adjusting the mixture ratio of a process gas flow conducted through a scrubber and a process gas flow conducted past the scrubber.

A grit chamber for a wastewater treatment plant. A vertical floodgate is installed on a partitioning wall and is driven in a vertical direction to be opened downwardly from a top toward a bottom. A floodgate driving motor is coupled to one end of the vertical floodgate to directly drive the vertical floodgate. An inflow amount measurement sensor functions to stepwisely measure a flow amount of wastewater which passes through a wastewater tank. A control section is connected to the floodgate driving motor and the inflow amount measurement sensor to control the floodgate driving motor in response to a measurement result of the inflow amount measurement sensor. A wastewater level is adjusted within a predetermined range through operation of the vertical floodgate to maintain a constant flow velocity of wastewater which passes through a sand sedimentation zone, thereby preventing organic material which is contained in the wastewater and is other than sand, from sedimenting.