8results about How to "Improve acidification effect" patented technology

The invention discloses environment-friendly authigenic acid as well as a preparation method and a use method thereof, and belongs to the technical field of oilfield chemistry, the environment-friendly authigenic acid comprises an acid generator composition and a prepared liquid aqueous solution, the acid generator composition is prepared from the following raw material components in parts by weight: 30 to 70 parts of deionized water, 20 to 30 parts of ethyl lactate, 10 to 15 parts of methyl lactate, 5 to 10 parts of trimethyl citrate, 5 to 10 parts of N-methylene chitosan phosphate, 2 to 5 parts of chitosan oligosaccharide and 3 to 5 parts of sodium tripolyphosphate. The prepared aqueous solution contains hexadecyl trimethyl ammonium bromide. The acid generator composition and the prepared solution aqueous solution are separated from each other before acidification construction, and are directly pumped into a well after being mixed according to a preset proportion in the acidification construction process. The acid generator composition is stable in performance before being mixed with a prepared aqueous solution, is not easy to oxidize and hydrolyze, can quickly generate acid after being mixed, and has a very good acidification effect after being used on site.

The utility model provides a premixer and a device for preparing phenylglycine through continuous acidification, and belongs to the technical field of chemical equipment, the premixer comprises a premixer shell, one end of the premixer shell is provided with a first liquid inlet and a second liquid inlet, and the other end of the premixer shell is provided with a mixed liquid outlet; and a mixing structure is arranged in the premixer shell. The device comprises a premixer, an acidification kettle and an external heat exchanger which are connected in sequence. According to the device for preparing phenylglycine through continuous acidification provided by the utility model, the premixer is adopted to pre-mix a decolorizing solution and sulfuric acid, and the decolorizing solution and sulfuric acid are continuously stirred and temperature is controlled in the acidification kettle, so that the purposes of reducing acidification retention time, reducing temperature control time and achieving continuous operation can be achieved, the acidification effect and stability are improved, the operation steps are reduced, and the production cost is reduced. The use quantity and the land area of the acidification kettle are reduced, stable and continuous acidification production of phenylglycine can be realized, the production stability and the production efficiency are improved, the product quality is improved, and the product production cost is reduced.

The application provides a hydrolysis acidification equipment for straw treatment, and relates to the technical field of straw hydrolysis, which comprises an equipment main body and multiple layers of sieve plates, wherein the sieve plates are all arranged in a conical shape, the sieve holes of the upper sieve plate are larger than those of the lower sieve plate, and stirring rods are movably installed on the upper sides of the sieve plates. The equipment main body is divided into multiple acidification zones from top to bottom, different sizes of straws are screened layer by layer through the multiple layers of sieve plates, and fall into different acidification zones respectively, and acidification bacteria liquid enters the equipment main body to hydrolyze and acidify the straws. The multiple acidification zones are formed through the multiple layers of sieve plates, the straw hydrolysis and acidification effect is effectively improved, the wedged extrusion space formed between the cutting edges of the scraper and the inclined part of the auxiliary knife is used to crush the straws, and the crushing effect of the straws is improved.

This invention provides a wellbore nitrogen atomization acidizing system and method, belonging to the field of reservoir stimulation technology. The system includes: an atomization unit with an atomization outlet located inside the wellbore for generating initial acid in an atomized state; an acid recovery unit equipped with an acid recovery pump for recovering acid and obtaining a mixed acid solution; a separation unit for separating the mixed acid solution to obtain the initial acid solution and injecting it into the atomization unit; a control unit for determining an acid distribution scheme based on real-time acidizing status information, generating a corresponding acid supply command based on the scheme, and distributing the command to the acid supply unit; and an acid supply unit connected to the inlet of the atomization unit for supplying the initial acid solution to the atomization unit based on the acid supply command. This invention effectively improves acidizing performance, reduces acid loss, and is adaptable to complex wellbore environments.

The present application discloses a non-flowback acidizing working fluid and its preparation method and construction process, which belongs to the field of oilfield chemical technology. The non-flowback acidizing working fluid includes a pretreatment fluid and a composite acid fluid, and the volume ratio of the pretreatment fluid to the composite acid fluid is 1: (2~10); the composite acid fluid includes an organic acid, hydrochloric acid and a cationic gemini surfactant; in terms of weight percentage, the composite acid fluid includes 15~25% of an organic acid, 1%~3% of hydrochloric acid, 0.2%~1% of a cationic gemini surfactant, and the remainder is water. The pretreatment fluid cleans and protects the casing of the oil well, dissolves the crude oil and organic scale on the surface of the reservoir; the organic acid, hydrochloric acid and the cationic gemini surfactant are compounded to obtain the composite acid fluid, and the organic acid is combined with the hydrochloric acid to improve the retarding performance, and the cationic gemini surfactant is combined, so that it has stronger surface activity and interfacial activity, is easier to form micelles, and has a good production increase effect.

The invention discloses a method for preparing high-purity chromium chloride through alkali circulation, which comprises the following steps: mixing ferrochromium and an alkali solution for liquid-phase oxidation leaching, carrying out solid-liquid separation on a leaching solution to obtain a chromate solution and leaching residues, adding a certain amount of organic reducing agent into the leaching solution to reduce hexavalent chromium in the solution into trivalent chromium, and carrying out solid-liquid separation on the trivalent chromium to obtain the high-purity chromium chloride. And carrying out solid-liquid separation on the reduced slurry to obtain a filter cake and filtrate. And washing the reduced filter cake, and performing acid dissolution to obtain the high-purity chromium chloride. And adding a certain amount of calcium oxide into the reduced filtrate for causticization reaction, and returning the causticized solution to liquid-phase oxidation. According to the method, oxidation-reduction of ferrochrome is achieved under the liquid phase condition to prepare trivalent chromium, then high-purity chromium chloride is prepared through acid dissolution, only a very small amount of alkali needs to be supplemented in the whole process, aluminum-silicon impurities in the trivalent chromium can be effectively removed, and the method has the advantages of being simple in technological process, clean, environmentally friendly, low in production cost and the like.

The application provides an injection well fluid and a preparation method and application thereof, the injection well fluid comprising a solvent and graphene oxide, the pH of the injection well fluid being 3-6; in the injection well fluid, the mass concentration of the graphene oxide is 0.2 mg / mL-5 mg / mL. The injection well fluid strengthens the acidification effect under the operation condition of high temperature and high pressure, and further significantly improves the overall flow conductivity of the hot dry rock reservoir and the heat exchange efficiency and development stability of the EGS system.

The invention belongs to the field of acidification equipment, and particularly relates to wool processing distributed acidification equipment which comprises a device body, a separating device is arranged on the surface of the device body, a spraying device is arranged on the surface of the device body, a dispersing device is arranged on the surface of the device body, and the separating device comprises a motor platform. According to the distributed acidification equipment for wool processing, through the arranged separation device, when wool in an acidification pool needs to be treated, a driving motor is started to drive a side gear to rotate through a driving gear, so that a rotating roller rotates, bevel teeth and matching teeth extrude each other, and the wool in the acidification pool is separated; and at the moment, a connecting plate stretches a spring, when the bevel teeth continue to rotate, the spring pulls back to the bottom plate, the bottom plate drives a splitting plate to do reciprocating motion, and therefore wool fibers can be better extracted from wool balls, and the separating efficiency of the separating device is improved.