38results about How to "Timely removal" patented technology

The vacuum chemical plating process for preparing composite metal film includes the first pre-modification of porous film by means of sol-gel technology to introduce one transition layer containing metal crystal seed with self-catalytic reduction activity to the chemical plating, and the subsequent vacuum chemical plating by means of forming different vacuum degrees on two sides of the modified porous composite film. The process can raise the hydrogen permeating performance of the composite metal film and raise the stability of the composite metal film.

The invention discloses a method for green planting of greenhouse tomatoes. The method comprises the steps of seed selection, greenhouse construction, seedling cultivation, seedling stage gradient temperature control, greenhouse temperature variation management, biological nitrogen fixation bacterial manure attenuation for root dipping of seedlings, planting, greenhouse field management, pest control, harvesting and the like. The tomatoes produced through the method are good in flavor and taste. A physical method is mainly adopted in the method for prevention and control of the pest and disease damage, so that the method has the advantages that remaining medicine is avoided, fruits are even, the yield is high, and the growth period is short.

The invention discloses a grating magnetic separation type sewage treatment apparatus. The apparatus comprises a magnetic separation cabinet, the middle portion of the magnetic separation cabinet is provided with a grating magnetic separation purifier, two sides of the magnetic separation cabinet are respectively provided with a water inlet and a water outlet, two sides of the grating magnetic separation purifier in the magnetic separation cabinet are respectively provided with a first perforated wall and a second perforated wall, an inlet water pool is formed between the first perforated wall and the water inlet of the magnetic separation cabinet, a purifying pool is formed between the first perforated wall and the second perforated wall, an outlet water pool is formed between the second perforated wall and the water outlet of the magnetic separation cabinet, and the inlet water pool, the purifying pool and the outlet water pool are sequentially communicated. The apparatus has the advantages of simple structure and convenient manufacturing, allows the speed of water flow in the grating magnetic separation purifier to be stably controlled through using the first perforated wall and the second perforated wall and cooperating with the purifying pool formed by the grating magnetic separation purifier, allows water to be effectively and comprehensively cleaned through the grating magnetic separation purifier, and ensures adaption to large sewage throughout.

The invention discloses a porous dual-metal hydroxide catalyst for electric catalysis of alcohol selective oxidation and a preparation method and application thereof. The preparation method of the porous dual-metal hydroxide catalyst comprises the steps that nickel salt, metal M salt (metal M is iron or cobalt or copper) and urea are adopted as raw materials, water is adopted as a solvent, a carbon fabric is adopted as a substate, a nickel-metal M composite hydroxide is loaded on the surface of the carbon fabric substrate through a microwave synthesis method, drying is performed, and finally,the catalyst is placed into a plasma reaction furnace to be activated, and finally the porous dual-metal hydroxide catalyst is obtained. The catalyst has the porous structure, the large specific surface area and the good conductivity, and has the excellent performance in the alcohol selective electro-catalysis oxidation reaction. Meanwhile, the technology for preparing aldehyde or acid through thealcohol selectivity electro-catalysis oxidation reaction is easy to implement, the selectivity of the product aldehyde or acid is high, and the catalyst is low in preparation cost and high in stability and has the good industrial application prospect.

The invention relates to the technical field of planting of Citrus Or and discloses a method of cultivating Citrus Or by green manure intercropping. The method comprises (1) selecting a plantation site, and building a plantation, to be specific, selecting a level land or low-lying land as the plantation having the soil, air and irrigation water quality meeting the 'three-product one-indication' standard of producing area environment; (2) selecting plantlets; (3) carrying out field planting; (4) applying fertilizers three years after field planting; (5) shaping and pruning young trees; (6) carrying out bud control and flower-fruit thinning techniques for the young trees; (7) intercropping grass, to be specific, intercropping a leguminous dwarf herb green manure among rows of fruit trees; (8) culturing robust autumn shoots; (9) pruning fruiting trees; (10) picking; and (11) cleaning the plantation. The problems of the prior art can be solved that unreasonable selection for a plantation site causes high mortality of seedlings, fertilizer application means are improper, planting management is unscientific, shoot tips and buds are not managed, Citrus Or grows slow, and fruit quality andyield are low.

The invention provides a method for removing crystalline salt as well as a design method and an application thereof. According to the method, at least one concentration detector is arranged in a wastewater outlet pipeline of the last stage of a separator, the concentration of blocking substances gathered in water injection positions after water injection and washing is detected, the variety of the blocking substances is determined, then the amount of water injected to each water injection position is controlled to be 50-1,000 times of water demand of saturated concentration of the blocking substances, and the water injection positions are located on pipelines between a reactor and separators and/or pipelines between separators. The method for removing the crystalline salt is applied to equipment and pipelines in a slurry bed hydrogenation process, the problem that a large quantity of byproducts such as crystalline substances and the like exist in hydrogenation products is solved, the content of the blocking substances is monitored in real time, the blocking substances in the hydrogenation equipment and the pipelines are removed in time, and the content of nitrogen and heavy metal in hydrogenation products and separated intermediate products of liquid oil is reduced.

The invention relates to the technical field of data processing, and provides a cache data detection method and device, computer equipment and a storage medium, and the method comprises the steps: obtaining a cache detection script corresponding to project information when an input cache detection request is received; running the cache detection script, and obtaining a js code of the target project; generating an abstract syntax tree corresponding to the js code; traversing all objects in the abstract syntax tree, and obtaining a first key of each piece of first cache data contained in the jscode; obtaining a second key of the second cache data subjected to cache clearing processing; and obtaining and displaying target cache data corresponding to a third key based on the third key which is contained in the first key and has a matching result with the second key as matching failure. According to the method and the device, the target cache data which are not subjected to clearing processing in the local cache can be quickly detected. The method can also be applied to the field of block chains, and the target cache data and other data can be stored on the blockchains.

The invention belongs to the technical field of high polymer materials, and particularly relates to a polysulfone series resin polymerization dehydration process. A rapid dehydration process is adopted in the polymerization process, and the system is heated to the boiling point of a solvent and is dehydrated in an azeotropic manner of the solvent and water. An ultralow-temperature condenser is matched with a novel molecular distiller, the mixed solution is quickly subjected to short-range separation, water and a pure solvent are recovered respectively, the almost anhydrous pure solvent is directly returned to the polymerization kettle, the solvent consumption for dehydration can be reduced by 30-50 wt%, no pollution is caused to the product, no dehydrating agent is left, the process is green and environmentally friendly; meanwhile, the production period can be shortened from 14-16 h to 10-12 h through the rapid and efficient dehydration process and the high dehydration temperature, andthe polymerization period is shortened by 25-28%. The obtained polysulfone polymer material has the advantages of high purity, low ash content, stable performance, low cost, no pollution and the like, and can be applied to the fields of medical instruments, aerospace, automobile parts, electronic components and the like.

The invention provides a built-in instant dehydration micro-interface reinforced DMC preparation system and method, wherein the system comprises a reaction tower; the middle part of the reaction tower is provided with a sealing plate; a first reaction section is arranged above the sealing plate, and a second reaction section is arranged below the sealing plate; the side wall of the first reaction section is connected with a methanol pipeline and a mixed gas pipeline from top to bottom; a first micro-interface generator is arranged in the first reaction section, a second micro-interface generator is arranged above the first micro-interface generator, and the first micro-interface generator and the second micro-interface generator are both connected with the mixed gas pipeline so as to disperse and crush mixed gas into micron-level microbubbles; a microbubble outlet is formed above the first micro-interface generator and clings to the first micro-interface generator; and a bottom outlet of the second micro-interface generator is connected with a micro-bubble pipeline. The preparation system disclosed by the invention is low in required reaction temperature and pressure, few in side reaction, high in methanol conversion rate and worthy of wide popularization and application.

The invention provides a reaction system and method for preparing lactide from lactic acid. The reaction system comprises a lactic acid oligomerization reaction kettle, a first reactive distillation tower, a lactide synthesis kettle and a second reactive distillation tower which are connected in sequence; the first reactive distillation tower comprises a first tower kettle reboiler, a purification section and a deep oligomerization dehydration reaction section, the purification section and the deep oligomerization dehydration reaction section are arranged from top to bottom, and a first feed port is formed in the tower section between the purification section and the deep oligomerization dehydration reaction section and used for introducing a product of the lactic acid oligomerization reaction kettle into the first reactive distillation tower. According to the reaction system provided by the invention, by uniformly integrating rectification and deep synthesis reaction, the reaction route is optimized, the reaction separation efficiency is improved, the product quality and yield are further improved, and in addition, the effects of saving the equipment cost and saving the occupied area of the equipment are also achieved.

The invention discloses a 4-aminobutyronitrile preparation method and device adopting a pyrrolidone liquid phase method. The preparation method comprises the following steps: mixing pyrrolidone and an organic solvent, and preheating at the preheating temperature of 90-110 DEG C; purifying and preheating ammonia gas, with the preheating temperature being 90-110 DEG C; fully mixing the pyrrolidone, the organic solvent and a catalyst, heating to a certain temperature, and introducing the ammonia gas into a reaction kettle for reaction; and after the reaction is finished, carrying out reduced pressure distillation on the reaction product to obtain the product 4-aminobutyronitrile. The preparation device comprises an ammonia gas pretreatment device, a reaction kettle, an ammonia water separator, a condenser and a gas-liquid separator, wherein a gas outlet of the reaction kettle is communicated with a gas inlet of the ammonia water separator, a gas outlet of the ammonia water separator is communicated with a gas inlet of the condenser, a gas outlet of the condenser is communicated with a gas inlet of the gas-liquid separator, a gas outlet of the gas-liquid separator is communicated with a gas inlet of the reaction kettle, and a water outlet is formed in the gas-liquid separator. The method and the device are low in energy consumption, easy in reaction, high in conversion rate and stable in product quality.

The invention relates to a scraper transmission mechanism of a cold-rolled emulsion magnetic filter, belonging to the technical field of cold-rolling equipment in the metallurgical industry. The technical solution is: including track (1), car body (2), upper scraper arm (3), lower scraper arm (4), upper top wire (5), lower top wire (6), cylinder (7) and scraper (12), the car body (2) is set on the track (1), the upper scraper arm (3) and the lower scraper arm (4) are respectively fixed on the car body (2) through pin shafts, the upper scraper arm (3) and One end of the lower scraper arm (4) is connected by a cylinder (7), and the other ends of the upper scraper arm (3) and the lower scraper arm (4) are respectively equipped with a scraper (12), the upper scraper arm (3) and the lower scraper arm ( 4) There are upper top wire (5) and lower top wire (6) respectively. The invention has the beneficial effects of avoiding the damage to the motor, the chain connection block and the pin shaft structure when the four-bar linkage mechanism in the prior art hits the block, and effectively improving the operating life of the scraper transmission mechanism.

The invention relates to a reaction system and method for preparing ethylene by using a slurry bed reactor. The system comprises the slurry bed reactor, a condenser, a condensation separator, a solvent pump, a solvent mixing tank, a solvent temperature control system, filter equipment, a green oil removing system, a high-temperature heating device and a catalyst reduction device, wherein the solvent temperature control system comprises a heater, a solvent bypass and a cooler; the solvent mixing tank communicates with the slurry bed reactor; the filter equipment communicates with the slurry bed reactor; the condenser communicates with the slurry bed reactor; the solvent temperature control system communicates with the slurry bed reactor; the condenser, the condensation separator and the solvent mixing tank communicate with one another successively; the solvent mixing tank, the solvent pump and the solvent temperature control system communicate with one another successively; the filter equipment, the high-temperature heating device, the catalyst reducing device and the solvent mixing tank communicate with one another successively; and the filter equipment, the green oil removing system and the solvent mixing tank communicate with one another successively. By the reaction system and method, the problems that heat inside prepared ethylene cannot be transferred out easily, and the utilization rate of a catalyst is low can be solved effectively.