137 results about "Solid matter" patented technology

The invention discloses a grating dam safety evaluation and design method and structure based on debris flow blocking degree. Wherein the safety assessment method comprises the following steps: S100, calculating the safety of the debris flow on the basis of the solid matter concentration of a debris flow susceptible area, the particle size value corresponding to the accumulated content of 95% in a full particle size grading curve, the channel average gradient, the channel average width and the primary debris flow scale in the section range of the grating dam, the minimum particle size value of the maximum boulder in the drainage basin and the opening width of the grating dam; calculating a critical blocking judgment coefficient according to the correlation value of the height of the grating dam, the angle of the wedge-shaped structure and 60 degrees and the correlation value of the total amount of debris flow solid substances and the reservoir capacity of the wedge-shaped beam type grating dam; and S200, evaluating the safety of the grating dam based on the critical blocking discrimination coefficient. The evaluation and design method and structure incorporate the relative relation between the debris flow scale and the dam body storage capacity, meanwhile, the influence on active structure parameters such as wedge-shaped flow guide is quantified, and the blocking state prediction accuracy of the grating dam in actual operation is improved to a certain degree.

The invention belongs to the technical field of high-activity tungsten powder preparation, and particularly relates to high-specific-surface-area high-activity tungsten powder and a preparation method thereof.The preparation method comprises the steps that diluted hydrochloric acid is added into an ammonium tungstate solution to adjust the pH to be acidic, then hydrogen peroxide is added, and a mixed solution is obtained; carrying out vacuum drying on the mixed solution at the temperature of less than or equal to 80 DEG C to obtain a solid substance; and in the hydrogen atmosphere, the solid matter is reduced, the tungsten powder with the high specific surface area and the high activity is obtained, and the specific surface area is larger than or equal to 10 m < 2 > / g. According to the technical scheme, ammonium chloride and peroxotungstic acid are creatively applied to be subjected to low-temperature heating decomposition to generate a large amount of gas to form a porous framework, and therefore the nano tungsten powder controllable in granularity, good in dispersity, high in specific surface area and high in activity is prepared; the performance of the high-specific-surface-area and high-activity nano tungsten powder can be controlled by simply controlling process conditions; and the application potential of the nano tungsten powder as a novel high-performance tungsten material is increased.

A method for controlling enzymatic hydrolysis of biomass-derived feedstock in a manufacturing process of a chemical bioproduct is disclosed. The enzymatic hydrolysis may take place in a hydrolysis reaction mixture. The hydrolysis reaction mixture may comprise solid matter. The method may comprise performing at least one Brix measurement on the hydrolysis reaction mixture; and controlling a dosing of at least one enzyme into the hydrolysis reaction mixture at least partially based on the results obtained from the at least one Brix measurement; wherein the results indicate a content of one or more soluble carbohydrates in the hydrolysis reaction mixture, and wherein the controlling of the dosing of the at least one enzyme into the hydrolysis reaction mixture is performed in order to affect at least the conversion of cellulose and optionally hemicellulose into monomeric carbohydrates in the hydrolysis reaction mixture.

The invention relates to the field of coal washing slurry treatment, and discloses coal washing slurry treatment equipment which comprises a base, a guide rail fixedly mounted on the base and a sliding seat slidably mounted on the guide rail, and further comprises a driving assembly, the driving assembly comprises a supporting rod, one end of the supporting rod is fixedly mounted on the base, and the other end of the supporting rod is fixedly mounted on the sliding seat; a mounting plate is fixedly mounted at the end, away from the base, of the supporting rod, a driving motor is fixedly mounted on the mounting plate, and a gear is fixedly mounted at the lower end of the driving motor. Through cooperation of the driving assembly and the blocking assembly, when the device is used for treating slurry, the driving assembly can drive the centrifugal barrel to rotate, solid matter and liquid matter in the slurry are separated through centrifugal force generated during rotation, and meanwhile, the solid matter and the liquid matter in the slurry are separated; by arranging the blocking assembly, collision friction between solid matter and the device can be reduced, the probability of abrasion of the device is reduced, and economic benefits are improved.

The invention provides a method for determining the floating content of a binder of a negative plate and application. The method comprises the following steps: acquiring a first weight loss ratio a0 of a negative electrode material at a first position of the negative plate in a target temperature interval; adding the negative electrode material at the first position into a target solvent for reflux, and then filtering and drying to obtain a solid substance; obtaining a second weight loss ratio a1 of the solid substance in the target temperature interval; obtaining a third weight loss ratio x1 of the binder standard substance and a fourth weight loss ratio x3 of the thickener standard substance; obtaining a first actual mass content of the binder based on a0, a1, x1 and x3; and obtaining the floating content of the binder based on the first actual mass content and the designed mass content of the binder. According to the method for determining the floating content of the binder in the negative electrode plate, the actual content of the binder in the negative electrode material at any position in the negative electrode plate can be quantitatively analyzed, and then the floating content of the binder is obtained by combining the design content of the binder.

The utility model relates to a solid-liquid separation device and a water pump applying the solid-liquid separation device, which solve the problem that solid substances in liquid are difficult to solve in the prior art, and adopt the technical scheme that the solid-liquid separation device comprises a separation cylinder with a liquid inlet, and a flow guide liquid outlet cylinder which is arranged on the separation cylinder and is provided with a liquid outlet, the separation barrel and the flow guide liquid outlet barrel are matched to form a solid-liquid separation channel communicated with the liquid inlet and the liquid outlet, the solid-liquid separation channel at least comprises a liquid inlet channel, a separation channel and a liquid outlet channel, and the tail end of the liquid inlet channel is matched with the flow guide liquid outlet barrel. The device has the advantages that liquid entering the liquid inlet channel impacts the corresponding part of the flow guide liquid outlet cylinder to change the flowing direction and flow into the separation channel, the tail end of the separation channel is matched with the separation cylinder, sand in the liquid in the separation channel is deposited in the deposition structure of the corresponding part of the separation cylinder, and the liquid changes the flowing direction and flows into the liquid outlet channel; and the separated liquid flows out from the liquid outlet, so that solid-liquid separation is realized, the solid-liquid separation effect is good, and the efficiency is high.

This invention discloses a sodium-intercalated precursor and a cathode material, their preparation methods, a cathode, and a sodium-ion battery. The disclosed method for preparing the nickel-iron-manganese sodium-intercalated precursor includes: introducing a metal salt solution, a sodium hydroxide solution, and ammonia into a reaction vessel, while simultaneously introducing oxygen and an inert gas below the liquid surface to conduct a co-precipitation reaction; the metal salt solution is a salt solution containing nickel, iron, and manganese; stopping the introduction of oxygen when the particle D50 in the reaction vessel reaches 2–5 μm; stopping the introduction of the metal salt solution and ammonia when the particle D50 in the reaction vessel increases to 2–13 μm; raising the temperature of the reaction vessel to 70–90°C, continuing to introduce sodium hydroxide solution until the pH reaches 12–13, and then introducing an oxidant solution into the reaction vessel to react fully for a period of time to obtain a slurry; and extracting the solid matter from the slurry to obtain the precursor. The precursor prepared by this method has uniform sodium intercalation and exhibits excellent electrochemical performance when used as a cathode material.

A method of producing useful fuel fluids from solid plastic waste, including loading solid plastic waste matter into a reaction chamber to define a load, subjecting the load to HTP to extract hydrocarbon mixtures, filtering the hydrocarbon mixtures to extract solid matter, and separating the hydrocarbon mixtures into a light fraction (C1 to C25) and a heavy fraction (C26 to C31). The heavy fraction is directed to a first container and the light fraction is directed to a second container. The light fraction is separated into diesel (C8-C25), gasoline (C4-C12), and vapor (C1-C5), and the diesel is directed to a third container, the gasoline is directed to a fourth container, and the vapor is directed to a fifth container. The hydrocarbon mixtures have a carbon number distribution between C1 and C31. The pressure in the reaction chamber is typically between 0.1 and 10 MPa and the temperature in the reaction chamber is between 350 and 500 degrees Celsius. The plastic waste is selected from the group consisting of PS, PE, PP, and mixtures thereof.

The utility model discloses a sponge city water body purification device which comprises a filter tank, a gathering filter structure and an auxiliary filter structure, the gathering filter structure is connected to the filter tank, and the auxiliary filter structure is installed on the inner side of the filter tank. The gathering and filtering structure is ingenious in design, liquid and solid matter are effectively separated through the synergistic effect of the horn-shaped gathering block, the T-shaped drainage pipe and other components, and the purification efficiency is improved; meanwhile, due to the application of the stirring gear driver, the flow dividing roller can rotate, and the separation effect is further enhanced; and secondly, the auxiliary filtering structure is powerful in function, stable lifting of a filtering concentric-square-shaped block is achieved through a filtering pulley block, a stretching winch and other components, efficient filtering is conducted in cooperation with an ultrasonic vibrator, neutralization treatment is achieved through a liquid medicine tank and a feeding valve, and the purification quality is improved.

The present invention provides a method for preparing an antibacterial agent using a mushroom and an antibacterial agent made therefrom. The antibacterial agent is made by using a residue left after preparing health foods from mushrooms, treatment with alcohol to obtain a solid matter, treatment with IN sodium hydroxide after drying, autoclaving, rinsing with water, filtering for decolorization and treatment with 10N-15N sodium hydroxide as needed.

The application discloses a reaction system with a straight-through particle collection recycling function, which comprises a reactor and a particle collector, the particle collector is located outside the reactor, and the reactor is connected with the particle collector through a pipeline; wherein the particle collector comprises a shell and a filter part arranged in the shell; the filter part is surrounded by a filter material and is used for intercepting solid substances; the upper end of the filter part is a feeding end, and the lower end of the filter part is a discharging end; a flushing part is arranged in the filter part and is used for flushing the solid substances intercepted in the filter part. The solid catalyst in the reaction system is effectively separated from the reaction system, and the separated catalyst is flushed and then put into the reaction again. In the flushing process, no liquid substance outside the reaction system needs to be additionally used.

A brightening and stain-removing laundry sheet and a preparation method therefor. The laundry sheet comprises: a film-forming agent, an anionic surfactant, a nonionic surfactant, a fluorescent brightening agent, an anti-fouling agent, an enzyme formulation, a plant extract, a chelating agent, and an auxiliary agent. The film-forming agent comprises a film-forming agent A and a film-forming agent B, the film-forming agent A being polyvinyl alcohol, and the film-forming agent B comprising one or more of polyvinylpyrrolidone and modified polyvinyl alcohol. The anionic surfactant comprises sodium alkyl sulfate, sodium fatty acid methyl ester sulfonate, and sodium α-alkenyl sulfonate; and the nonionic surfactant comprises polyglycerol ester of fatty acid, fatty alcohol-polyoxyethylene ether, fatty acid methyl ester ethoxylate, and alkyl polyglycoside. The laundry sheet has high solubility, achieves a remarkable brightening effect on fabrics while having stain-removing capability, and further possesses the advantages of good portability, convenient use, no solid matter remaining after use, etc.

The present application relates to the field of leachate, particularly to a kind of processing device and method for recycling phosphogypsum leachate;Including reagent mixing tank, leachate storage tank, reagent supply tank and recovery separation tank, the present application can solve the following problems existing in the process of treating phosphogypsum leachate in prior art: unable to continuously treat phosphogypsum leachate for a long time;Phosphogypsum leachate such as phosphate, heavy metals and organic matter cannot be recycled, resulting in waste of resources;The size of the reagent cannot be automatically adjusted according to the amount of phosphogypsum leachate;The present application can separate the solid and liquid of phosphogypsum leachate through the recovery separation tank, extract the recyclable solid materials and store them;The water flow formed by the leachate can automatically adjust the amount of reagent added, so that the leachate reaches the required acidic range after mixing with the reagent.

The application discloses a self-adaptive constant-speed discharging screw extruder, and belongs to the technical field of sludge treatment. The self-adaptive constant-speed discharging screw extruder comprises a driving mechanism and a mounting platform, the driving mechanism is connected with an extrusion screw through a transmission mechanism, a mixing chamber, a uniform chamber and an agglomeration chamber are arranged outside the extrusion screw, a liquid discharge assembly is mounted on the outer wall of the uniform chamber, two symmetrically-arranged supplementary pipes are arranged in the liquid discharge assembly, and filter covers are fixed to the inner walls of the upper and lower ends of the supplementary pipes. The self-adaptive constant-speed discharging screw extruder can actively remove the thin sludge mixture with low solid content above the meshing area through the arrangement of the supplementary pipes and the suction plate, the total amount of liquid needing to enter the high-pressure section is reduced, the load of the subsequent extrusion section is reduced, the extrusion of solid substances can be more focused, the solid content of the final sludge cake and the processing capacity of the equipment are improved, the upper free treatment agent liquid is selected before extrusion dewatering, the utilization rate of the treatment agent is improved, and the operation cost is reduced.

The application discloses a buried vacuum pump station and relates to the technical field of vacuum pump stations.The buried vacuum pump station comprises an integrated shell, a manhole is fixedly connected to the top of the integrated shell, the bottom of the manhole is communicated with the inside of the integrated shell, a tank sealing plate is fixedly connected to the inside of the integrated shell, an operation room is arranged above the tank sealing plate, a sewage inlet vacuum pipe is fixedly connected to the top of the tank sealing plate, and a concealed stem gate valve is fixedly installed on the sewage inlet vacuum pipe.The high-speed flowing sewage can effectively drive the rotating frame to rotate, the rotating frame drives the cutting knife one to rotate in the process of rotating, the cutting knife one cuts the solid matters in the sewage together with the adhered cutting knife two in the process of rotating, the cutting knife one and the cutting knife two can cut the solid matters after cutting, the situation that the solid matters block the pipeline is reduced, the sewage treatment efficiency is effectively improved, the solid matters are prevented from causing load to the components in the equipment, and the maintenance cost is further reduced.

The application provides a positive electrode paste and a preparation method thereof, and a positive electrode. The positive electrode paste comprises solid substances, the solid substances comprise a positive electrode active material and a conductive agent, the solid substances further comprise a composite binder, the composite binder comprises a skeleton phase binder and a dispersed phase binder, the mass ratio of the skeleton phase binder to the dispersed phase binder is (2:1) to (6:1), and the composite binder accounts for 0.8% to 1.5% of the mass of the solid substances; and the total solid content of the positive electrode paste is not less than 70%. The positive electrode paste reduces the friction between particles by using the interfacial activity of the dispersed phase binder, realizes the slurry preparation with a solid content of more than 70%, constructs a double-layer network in which the dispersed phase binder flexibly covers the rigid bridging of the composite skeleton phase binder, has good dispersion effect and significantly improves the peel strength of the electrode sheet, reduces the solvent consumption by about 30%, greatly shortens the coating and drying time and reduces the energy consumption, simultaneously reduces the binder consumption, improves the proportion of active substances and brings the improvement of the energy density.

The application discloses a kind of light foam sandy soil based on low-temperature resistant microbial curing agent and its preparation method, the light foam sandy soil includes solid matter and liquid matter, the mass ratio of solid matter and liquid matter is 3.5-6:1, the proportion of each substance in solid matter is 78-84wt% of sandy soil, 12-18wt% of composite activator, 4-6wt% of bacterial foam adsorbent, and the liquid matter is cementing solution.The preparation method includes the following steps: preparing low-temperature resistant microbial curing agent;The prepared low-temperature resistant microbial curing agent is mixed uniformly with sandy soil to obtain solid matter;The obtained solid matter is mixed uniformly with cementing solution, i.e. to obtain light foam sandy soil based on low-temperature resistant microbial curing agent.The technical scheme of the application significantly improves the survival rate and mineralization efficiency of the strain in low-temperature environment, and the light foam sandy soil prepared using the technical scheme has a lower mass per unit volume, higher compressive strength and higher permeability resistance.

The invention relates to the technical field of isotope solution storage, in particular to an antimony isotope standard solution and a preparation method and application thereof.The method comprises the steps that antimony isotope particles are dissolved in a mixed solution of reverse aqua regia and hydrofluoric acid and dried, and an antimony isotope solid matter is obtained; reverse aqua regia and hydrofluoric acid are ingeniously selected as a dissolving system, Sb < 3 + > is complexed by hydrofluoric acid to form [SbF6] < 3->, the problem of isotope ratio drift caused by Sb < 3 + > hydrolysis is effectively inhibited, the strong oxidizing property of the reverse aqua regia ensures that Sb is completely converted into Sb < 5 + >, and the content of the Sb < 5 + > is increased. Therefore, valence fluctuation is avoided, long-term stable preservation of the antimony isotope standard solution is achieved, and the problems that an existing antimony isotope standard solution is prone to hydrolysis and unstable in valence are effectively solved.

A cleaning apparatus includes a liquid delivery system in fluid communication with a supply tank. A suction source is configured to create a vacuum effect along an airflow path. A recovery tank assembly includes a sorting channel extending between a fluid inlet and a fluid outlet. A proximal end of the sorting channel is larger than a distal end of the sorting channel for controlling an airflow velocity through the sorting channel. A separator at least partially defines the sorting channel and includes a fluid permeable portion. Liquid and solid matter are configured to be directed through the sorting channel by the suction source, with the liquid being directed through the fluid permeable portion to be collected in a liquid collection area below the fluid permeable portion, and the solid matter being collected in a solid collection area disposed along the airflow path between the fluid inlet and the fluid outlet.

The utility model discloses a kitchen waste sorting device, and particularly relates to the technical field of kitchen waste treatment, which comprises a mixing drum and a mixing shaft rotatably arranged in the mixing drum, a plurality of mixing rods are fixedly mounted on the outer wall of the mixing shaft, and a sealing barrel is arranged at the bottom of the mixing shaft. The bottom of the stirring shaft is rotationally arranged on a bottom plate arranged at the bottom of the sealing barrel, and the stirring shaft moves in the vertical direction so that the top end of the sealing barrel can be attached to the annular edge arranged at the bottom of the stirring barrel. According to the kitchen waste sorting device, the stirring shaft is driven to rotate so that the vortex can be formed in the stirring barrel, heavy metal, bones and solids can sink and accumulate in the sealing barrel to be collected due to the vortex, the stirring shaft is driven to move downwards rapidly so that the cover plate can seal the discharging opening, and therefore the kitchen waste can be sorted. At the moment, most solids and metal objects in the sealing barrel are sorted out of the stirring barrel, and the remaining kitchen waste is subjected to subsequent sorting, so that the solids and the metal objects in the kitchen waste are conveniently sorted.

The invention belongs to the technical field of single-cell suspension preparation, and discloses a single-cell suspension preparation device convenient to take, the single-cell suspension preparation device comprises a rotating shaft and blades distributed on the surface of the rotating shaft, the rotating shaft is connected with a power source outputting rotation action, the single-cell suspension preparation device further comprises a cylinder and a cleaning mechanism, and the rotating shaft is installed in the cylinder and only has rotation freedom; one end of the barrel is detachably connected with a filter cover provided with a liquid outlet, the filter cover is provided with a filter basket, the filter basket intercepts solid substances moving towards the liquid outlet, and the liquid outlet is provided with a valve; the cleaning mechanism comprises a liquid return pipeline detachably connected with the valve, the liquid return pipeline is connected with a water pump and a first flow adjusting valve in series, the end, opposite to the end connected with the valve, of the liquid return pipeline is detachably connected with a spray head, and the spray head is installed on the cylinder wall of the cylinder and stretches into the cylinder. The liquid return pipeline is connected with a liquid supply pipeline beside the line position between the water pump and the first flow adjusting valve, the end of the liquid supply pipeline is connected with a cleaning liquid supply end, and a second flow adjusting valve is arranged on the line of the liquid supply pipeline.

The hard coating composition includes a solvent and a hard coating solid matter. The hard coating solid substance comprises a silsesquioxane compound, a free radical polymerization initiator and a cationic polymerization initiator, the silsesquioxane compound comprises a free radical polymerizable functional group and a cationic polymerizable functional group, the free radical polymerizable functional group comprises a (meth) acrylate group, and the cationic polymerizable functional group comprises a (meth) acrylate group. The cationically polymerizable functional group includes an oxetane group. A method of manufacturing a window includes applying a hard coating composition on a base layer to form a preliminary hard coating; drying the preliminary hard coating to remove the solvent; and curing the dried preliminary hard coating layer to form the hard coating layer. The electronic device comprises a window manufactured by the method and a power module for supplying power.

This invention provides a filter for removing solid matter from FCC oil slurry and its concentrate, and a method for removing it. [Solution] The filter comprises a main tank 4, a first filter cylinder, a second filter cylinder, and a third filter cylinder. Both the first and second filter cylinders consist of one main pipe and numerous porous secondary conduits surrounding the main pipe. A one-turn first filter membrane is provided on the outer circumference of each secondary conduit. A filter cake scraper 7 is provided inside the main tank located above the third filter cylinder, and a de-slurging bin 8 is provided at the bottom of the main tank. The present invention enables complete solid-liquid separation of FCC oil slurry and its concentrate, as well as fully automatic intelligent operation.

The utility model discloses a boiler pulverized coal pipeline wind speed accurate checking monitor, which belongs to the field of wind speed measurement and comprises a boiler pipeline, a mounting plate is detachably mounted at the top end of the boiler pipeline, and a test pipeline is movably sleeved with the mounting plate. A mounting frame is fixedly mounted at the bottom of the boiler pipeline, a bottom plate is fixedly mounted at the bottom end of the mounting frame, a fixing plate is fixedly mounted on the outer side of the bottom plate, a pressing plate is fixedly mounted at the top end of the fixing plate, mounting rings are fixedly mounted at the four corners of the bottom plate, and second bevel gears are rotatably mounted at the top ends of the mounting rings. According to the device, the side wall can be continuously knocked and vibrated, so that solid particles attached to the inner side wall of a pipeline can be shaken off and are taken away along with airflow in the shaking-off process, and the overall monitor effectively avoids the airflow velocity influence caused by the structural change of attachment of the solids on the inner wall; and the monitoring accuracy of the whole device is improved.

A method for processing of phosphate compounds comprises providing (S10) of a primary liquid being an acid solution comprising at least phosphorous. Phosphate compounds comprising iron are precipitated (S20) from the primary liquid by adding (S22) a first additive material to the primary liquid. The first additive material comprises iron hydroxide and a solid filter-aid material. First solid matter, comprising the precipitated phosphate compounds and the solid filter-aid material is separated (S28) by a first filtering. The separated first solid matter is exposed (S30) for an alkaline solution, causing a dissolution (S32) of phosphate compounds and precipitation (S32) of iron hydroxide, which gives a secondary liquid. Second solid matter comprising the precipitated iron hydroxide and the solid filter-aid material is removed (S38) by a second filtering. Part of the second solid matter is recycled (S40) as the first additive material. A system for processing of phosphate compounds is also disclosed.

The invention belongs to the field of powder metallurgy, and relates to high-strength wear-resistant copper alloy powder for powder metallurgy and a preparation method thereof.The method comprises the following steps that electrolytic copper, a copper-aluminum intermediate alloy, a copper-iron intermediate alloy and a copper-titanium intermediate alloy are weighed, cast and homogenized according to the set mass fraction; the cast ingot is remelted to obtain alloy liquid, the alloy liquid is guided through a tundish, high-pressure water jet is adopted for atomizing the alloy liquid, and water atomized powder is obtained; heating the mixed molten salt to 20-100 DEG C higher than the melting point, and adding water atomized powder after the melt is clarified; the melt is heated to 100-300 DEG C higher than the melting point, and heat preservation stirring is carried out; finally, the temperature of the melt is reduced to be 20-100 DEG C higher than the melting point, molten salt on the upper portion is removed, a high-concentration copper powder and molten salt mixture is left, casting and cooling are conducted, and a solid matter is obtained; mechanically crushing the solid matter, transferring the crushed solid matter into a ball milling tank, and carrying out ball milling by taking water as a medium; and after solid-liquid separation and centrifugal spin-drying are conducted on the mixture obtained after ball milling, the high-strength wear-resisting copper alloy powder is obtained through low-temperature drying.

The utility model discloses a waste water primary filtering device for pigment production, which comprises a filtering and settling tank, a filtering support, an N-shaped screening pipe, a siphon J-shaped drainage pipe, a screening structure and a drainage structure, the filtering and settling tank is mounted on the filtering support, the N-shaped screening pipe is inserted into the bottom end of the filtering and settling tank, and the siphon J-shaped drainage pipe is inserted into the screening structure. The utility model relates to the technical field of pigment production, by utilizing a siphon principle and a screening structure, after waste water stands, upper liquid is drained to the upper part of the partition plate through a plurality of J-shaped siphons, so that effective solid-liquid separation is realized, the solid-liquid separation efficiency is greatly improved, and solid substances are remained at the bottom end of the partition plate, so that the solid-liquid separation efficiency is greatly improved. Liquid is drained through the siphon, and filtering load is effectively reduced.

The present invention relates to the field of organic synthesis, and in particular relates to a system and method for recovering a polyester to prepare bis(2-hydroxyethyl) terephthalate. The system sequentially comprises, along a feeding direction, a polyester pretreatment system, a polyester alcoholysis system, a solid matter filtering system, a solvent recovery system, a diethyl terephthalate refining system and a bis(2-hydroxyethyl) terephthalate preparation system. In the present invention, by optimizing the process route for recovering a polyester to prepare bis(2-hydroxyethyl) terephthalate, i.e., first degrading a polyester into an intermediate product diethyl terephthalate and then preparing bis(2-hydroxyethyl) terephthalate from the diethyl terephthalate, the costs for recovering the polyester to prepare bis(2-hydroxyethyl) terephthalate can be reduced, and the yield of bis(2-hydroxyethyl) terephthalate can be improved, thereby making the method more suitable for industrial application.

The invention discloses a preparation process of a slow-release underground water organic pollution degradation purifying agent, which comprises the following steps: (1) adding sepiolite powder, cobalt salt and iron salt into water, uniformly mixing, adjusting to be alkaline, separating out solids, washing, drying, and calcining to obtain active catalytic powder; and (2) uniformly mixing activated carbon with the persulfate saturated solution, freeze-drying, and grinding to obtain the modified activated carbon powder. Granulating the modified activated carbon powder, and drying to obtain core particles; and (3) uniformly mixing the styrene-butadiene-styrene block copolymer emulsion with the active catalytic powder to obtain a slow-release film solution, coating the surface of the core particle with the slow-release film solution, and drying to obtain the degradation purifying agent. According to the present invention, the sulfate and the catalyst can be completely contacted, the problems of rapid consumption and low utilization rate of the persulfate can be effectively alleviated, the degradation effect on the organic pollutants is improved, and the good purification effect can be maintained for a long time.

The present invention provides a pouch container that allows liquid to be separated from solid matter and discharged without having to invert the container. [Solution] The pouch container 1 includes a bottom portion 3 formed to be concave downwards, a first opening line 4 extending from a first notch 41 formed at the side end across the bottom portion 3 and forming a liquid outlet 42 at the bottom portion 3, and a second opening line 5 extending from a second notch 51 formed above the first notch 41 at the side end above the first opening line 4 and forming a solids outlet 52 with a larger opening than the liquid outlet 42.