17results about How to "Reduce flocculation" patented technology

The invention discloses a humic acid liquid fertilizer and a preparation method and application thereof, and belongs to the technical field of liquid fertilizers, organic waste and ferric oxide are ball-milled and mixed, transferred into a muffle furnace, roasted for 2-2.5 h at 280-310 DEG C under nitrogen protection, transferred into a reaction kettle and stirred and mixed with a 10 wt% hydrogen peroxide aqueous solution and potassium hydroxide powder, and the humic acid liquid fertilizer is obtained. The preparation method comprises the following steps: adding potassium humate into a potassium humate solution, extracting for 40-60 minutes under the assistance of ultrasonic waves, filtering to obtain a potassium humate extract and filter residues, transferring the potassium humate extract into a stirring kettle, adding urea, dipotassium phosphate, a composite carbon dot lubricant and a suspension stabilizer into the stirring kettle, and uniformly mixing to obtain the humic acid liquid fertilizer. The suspension stabilizer can reduce the generation of flocculation and crystallization in the liquid fertilizer, and through the antifriction and lubrication effects of the composite carbon dot lubricant, the friction force between indissolvable solids and water outlet holes of the drip irrigation equipment is reduced, and the risk of blockage of the drip irrigation equipment is reduced.

The invention relates to the field of antistatic PVC (polyvinyl chloride) materials, in particular to a preparation method, a product and application of an antistatic pre-dispersion for a PVC film. The antistatic pre-dispersion for the PVC film is prepared by preparing an antistatic agent from an aminated ionic liquid-CNT compound and carboxylated Mxene, and mixing the antistatic agent with a plasticizer, an auxiliary dispersant and a hyperbranched flow improver. PVC resin and the like can be further combined to prepare a coating, and the coating and base cloth are prepared into a PVC film structure material to serve as an antistatic PVC material. The antistatic pre-dispersion prepared by the invention has good dispersibility in PVC resin, is slightly influenced by environmental temperature / humidity, and has a lasting antistatic effect. Meanwhile, the PVC film structure material prepared by using the antistatic pre-dispersion disclosed by the invention is good in wear resistance, not easy to migrate, stable in performance and relatively long in service life.

The invention discloses a purification system and method for removing conventional pollutants and antibiotic resistance genes in garbage penetrating fluid, and belongs to the technical field of sewage treatment.The purification system comprises a pre-sedimentation tank, a purification tank, a nanofiltration membrane module device, a clean water tank, a concentrated water tank and a backwashing system, and the upper portion of the pre-sedimentation tank is communicated with an adjusting tank through a conveying pipeline; the purification tank comprises a flocculation tank and an inclined plate sedimentation tank which are adjacently communicated, and the flocculation tank is communicated with the regulating tank through a conveying pipeline; the liquid inlet end of the nanofiltration membrane unit is communicated with an overflow pipe of the inclined plate sedimentation tank, the clean water tank is communicated with the water outlet end of the nanofiltration membrane unit, and the concentrated water tank is communicated with one water outlet end of the nanofiltration membrane unit; the backwashing system is communicated with the water outlet end of the nanofiltration membrane module and is used for backwashing the nanofiltration membrane module. According to the method, a flocculation process and a nanofiltration process are combined, the concentration of pollutants can be greatly reduced in the flocculation process, membrane pollution caused by the fact that a large number of pollutants enter a nanofiltration membrane is avoided, and removal of conventional pollutants and ARGs is enhanced in the nanofiltration process.

This invention relates to a green resource utilization process for contaminated sludge, comprising: river dredging sludge, lake and reservoir dredging sludge, culvert dredging sludge, and various types of sludge. After passing through a screen, the contaminated sludge is transported to a heavy metal release treatment facility. Following release treatment, it is transported to a Fenton process to treat organic pollutants, then to an activated particle filter to remove heavy metals. The remaining sludge is flocculated, and the flotation scum and sediment are collected and transported to a CO2 carbonization process. Finally, it is transported to a mechanical dewatering process. The resulting solids are used as improved soil for resource utilization, and the dewatered filtrate is used as reclaimed water through ion exchange.

The invention discloses a preparation method of a polyaluminum chloride flocculating agent, and relates to the technical field of water purifying agents. Comprising the following steps: 1, adding attapulgite into a sodium sulfide solution, and carrying out hydrothermal reaction to obtain modified attapulgite; compounding the modified attapulgite, sodium alginate and sodium metaaluminate to obtain a stabilizer; 2, sequentially adding aluminum hydroxide, hydrochloric acid and purified water into the enamel reaction kettle, and carrying out primary reaction; discharging the reacted solution into an adjusting kettle, adding calcium aluminate powder and a stabilizer, carrying out secondary reaction, and carrying out filter pressing to obtain PACV liquid; 3, cationic starch is added into the PACV liquid, heating and stirring are conducted, spray drying is conducted, and the polyaluminum chloride flocculant is obtained. According to the scheme, a compound stabilizer containing modified attapulgite and sodium alginate is introduced, so that the salinity of the polyaluminum chloride is effectively improved, and the flocculation performance of the polyaluminum chloride is enhanced; and cationic starch is further introduced as a coagulation aid subsequently, so that the bridging performance is promoted, and the water purification effect is enhanced.

Provided are a metal pigment containing novel composite particles that have not been seen in conventional technologies and a method for manufacturing a metal pigment having reduced flocculation. The problem is solved by a metal pigment containing metal particles and composite particles having one or more coating layers formed on surfaces of the metal particles, or the like, the metal pigment being characterized in that (1) the composite particles have a flaky shape, (2) a volume-based diameter D50 is 0.1 to 30 µm when a particle size distribution of the composite particles is measured by a laser diffraction type particle size distribution meter, and (3) the composite particles have an average thickness of 15 to 300 nm.

The invention discloses a humic acid liquid fertilizer and a preparation method and application thereof, belonging to the technical field of liquid fertilizers. Organic waste and ferric oxide are ball-milled and mixed, transferred to a muffle furnace, protected by nitrogen and roasted at 280-310 DEG C for 2-2.5 hours, transferred to a reactor and stirred and mixed with 10wt% of hydrogen peroxide aqueous solution and potassium hydroxide powder, extracted for 40-60 minutes under the assistance of ultrasound, filtered to obtain potassium humate extract and filter residue, transferred the potassium humate extract to a stirring kettle, urea, dipotassium hydrogen phosphate, a composite carbon point lubricant and a suspension stabilizer are added to the stirring kettle, and mixed evenly to obtain the humic acid liquid fertilizer; the suspension stabilizer can reduce the generation of flocculation and crystallization in the liquid fertilizer, and the anti-friction lubrication effect of the composite carbon point lubricant helps to reduce the friction between the insoluble solid and the water outlet hole of the drip irrigation equipment, thereby reducing the risk of clogging of the drip irrigation equipment.

The present invention is a nanofiber forming device, which is a fully enclosed structure, including an extended flow channel pulp distributor, a flow channel, and an adjustable upper lip plate mechanism connected in sequence; wherein the extended flow channel pulp distributor is a straight-up single-flow channel type, and the flow channel cross-sectional area perpendicular to the slurry flow direction gradually expands from a circular hole at the slurry inlet that is the same as the diameter of the slurry pipe to a rectangular area equal to that near the flow box, so as to ensure that the ultra-low concentration nanofiber slurry forms a stable isobaric distribution along the width direction; the flow channel inlet is rectangular, and the cross-sectional area further suddenly increases, and the height in the flow channel is adjustable; the adjustable upper lip plate mechanism can adjust the displacement, and while realizing local fine-tuning of the lip opening height, it can also make forward and backward translation adjustments. The present invention has a simple structure and is suitable for the formation of ultra-low concentration nanofiber slurry of 0.01%-0.05%. The fully enclosed structure can prevent the nanofibers from contacting the air, thereby avoiding the generation of a large number of bubbles. As the application of nanofibers in this hot field continues to heat up, it will have a huge market prospect.

The application relates to the technical field of petroleum drilling fluid treating agents, and discloses sulfonated lignite applied to drilling fluid and a preparation method thereof, the preparation method being as follows: modified lignite and modified 4,4'-diamino diphenyl ether are mixed, the temperature is increased to 120-140 DEG C, and stirring reaction is carried out for 1-2 hours, then modified diethanolamine is slowly added dropwise, and the reaction is continuously carried out for 0.5-1 hour, the reaction mixture is poured into a mold, the temperature is increased to 160-180 DEG C, and the temperature is kept under 10-20 MPa for 2-4 hours, and sulfonated lignite applied to drilling fluid is obtained after crushing. The sulfonated lignite prepared by the application has good high-temperature stability and salt resistance.

The utility model belongs to the technical field of mineral separation experiment equipment, and particularly discloses a handheld simple wet screening device, a screen comprises a screen surface and a screen frame, a base is of a circular ring structure, a ring groove I capable of being in sliding fit with the outer cylindrical surface of the screen frame is coaxially formed in the base, a vibrator is arranged in a handle, and the driving end of the vibrator is connected with the outer wall of the base; the fixing cover is of a circular ring structure, a ring groove II capable of being in sliding fit with the outer cylindrical face of the screen frame is coaxially formed in the fixing cover, the fixing cover is buckled on the base in the mode that the ring groove II faces the ring groove I, at least two buckles are evenly distributed on the base on the outer side of the ring groove I, the buckles are elastic bodies, and the sides, facing the circle center of the base, of the buckles can be in interference fit with the outer cylindrical face of the fixing cover. The annular base and the fixing cover which are matched with the screen mesh are arranged, the buckle capable of clamping and fixing the screen frame is arranged on the base, and the vibrator driving the base to vibrate in the handle is matched, so that wet screening of mineral particles is achieved, and the wet screening device has the advantages of being simple in structure, easy and convenient to operate, low in labor intensity and high in screening efficiency.

The invention relates to the technical field of cloth pulp machines, and provides a cloth pulp machine for controllable formation of multiple layers of fibers and a control method of the cloth pulp machine. Comparing the layer pressure Pi with a target pressure Ptarget; and controlling the pulp distributor according to the comparison result. The pulp distribution machine is controlled through the layer pressure Pi, layered independent pulp supply can be achieved, controllability of composition and thickness of each layer of fibers is guaranteed, fiber flocculation and local deposition are remarkably reduced, the uniformity of paper sheets is improved, coupling of interlayer adjustment is avoided, and sensitivity and reliability of system adjustment are guaranteed.

The invention relates to a compounding method of a flocculant adapting to high temperature and high pH value. The compounding method comprises the following steps: adding biochar into a sodium silicate solution, keeping the pH value of the solution to be 3-5, polymerizing to generate polysilicic acid containing biochar, adding aluminum chloride, keeping the pH value of the solution to be 8-10, stirring and reacting for 2 hours, and drying to obtain the composite flocculant for high temperature and high pH value. The use environment of the flocculant in the prior art is mostly acidic, flocculation effect reduction and failure are easy to occur under the alkaline condition, and the flocculant suitable for alkaline and high-temperature use conditions is prepared aiming at the two conditions that the use temperature of the flocculant in the prior art is mostly 5-20 DEG C and the stability of the flocculant becomes poor under the condition that the temperature exceeds 25 DEG C; the preparation method is simple, low in cost and suitable for being self-made in basic water plants.

The present invention discloses a high-strength and corrosion-resistant horizontal nano sand mill, comprising a machine base and a grinding cylinder, wherein the grinding cylinder is fixedly mounted on the upper end surface of the machine base, a grinding chamber is provided inside the grinding cylinder, a grinding cylinder rear end cover is provided at the left end of the grinding cylinder, a grinding cylinder front end cover is provided at the right end of the grinding cylinder, a main shaft is connected to the grinding cylinder for transverse rotation, the left end of the main shaft passes through the grinding cylinder front end cover and is provided with a driving mechanism, and a material separator is provided at the right end of the main shaft. In the present invention, a scraper is close to the inner wall of the grinding cylinder and is in contact and sliding connection with the inner wall of the grinding cylinder, so that the material and the grinding medium adhering to the inner wall of the grinding cylinder are scraped off, so that the material and the grinding medium are prevented from adhering to the inner wall of the grinding cylinder, so that the material is fully ground, and the material adhering to the inner wall of the grinding cylinder can be discharged in time, so that the material is fully utilized.

This application relates to a sludge dewatering equipment and process for sludge treatment, belonging to the technical field of sludge treatment. It includes a flocculation tank and a feeding assembly and a stirring assembly disposed on the flocculation tank. The feeding assembly is used to add flocculant, and the stirring assembly is used to mix the added flocculant evenly. The stirring assembly includes an axial flow cylinder coaxially disposed within the flocculation tank. The axial flow cylinder includes a axial pusher section and a vortex section fixed from top to bottom. The diameter of the axial pusher section is larger than the diameter of the vortex section, and there is a smooth transition between the axial pusher section and the vortex section. Rotatable and axially movable propulsion blades are movably disposed within the flocculation tank. The flocculation tank is also equipped with an adjusting component for adjusting the height of the propulsion blades according to sludge of different viscosities, and a driving component for driving the propulsion blades to rotate. This application has the effect of improving the uniformity of flocculant mixing and the flocculation effect of sludge, thereby improving the sludge dewatering efficiency and reducing the risk of environmental pollution from dewatered sludge.

The invention discloses a high count yarn bobbin unwinding cotton fiber attachment prevention method and device based on microenvironment regulation and control, relates to the technical field of textile machinery, and aims to solve the problem that yarn tension is concentrated to cause fiber collection due to the fact that a traditional tensioner cannot realize dynamic tension regulation. The device specifically comprises a rear frame and a front frame which are connected, an air cylinder is used for actively applying longitudinal reciprocating motion to a primary sequence roller, so that the distance between the primary sequence roller and a sequence roller is changed, different tension control is achieved when yarn is unwound, meanwhile, the vibration buffering effect on the primary sequence roller is achieved through two-way elastic fixing at the two ends of the primary sequence roller, and the yarn unwinding effect is improved. Therefore, vibration generated when the yarn is unwound is weakened, the cotton fiber collecting phenomenon caused by concentrated tension at the tail of the high-count yarn bobbin is further remarkably reduced, and the purposes of stably and reliably unwinding and preventing cotton fibers from being attached to the yarn can be achieved through combination of the two.

The invention belongs to the technical field of environmental governance, and particularly relates to a process method for eluting and removing granular nutritive salt in a water body. Comprising the following steps: S1, deeply plowing and stirring bottom mud under the action of mechanical force, air flow or water flow, so that pollutants in the bottom mud are released and dissolved in water, and cleaned large-particle-state silt is precipitated; and S2, pumping a mud-water mixture obtained by elution into a sewage / water separation tank, adding a modified biological flocculant and an auxiliary agent, carrying out mechanical stirring, coagulating and precipitating pollutants in the sewage / water separation tank, returning clean water to a water body, and treating the precipitated sludge in an elution sludge treatment unit. The invention provides a process method for eluting and removing granular nutritive salts in a water body, which can effectively remove the nutritive salts, control endogenous pollution by transferring small particulate matters, remarkably increase the volume weight of bottom mud on the surface layer, improve the anti-disturbance capability of the bottom mud and facilitate the construction of a stable mud-water interface.

The present invention relates to the field of antibacterial coatings, and in particular to an antibacterial nano coating and its preparation method and application. The raw materials of the antibacterial nano coating, measured by mass, include: 40 to 60 parts of water-based resin, 10 to 20 parts of modified resin, 2 to 5 parts of modified nano rice husk powder, 5 to 10 parts of filler particles, 1 to 5 parts of functional additives, and 40 to 80 parts of deionized water. The antibacterial nano coating prepared by the present invention can ensure that while having excellent antibacterial and environmental protection properties, its waterproofness, mechanical properties, and high brightness are greatly improved. It has comprehensive coating application functions, greatly expands the application field and environment of the antibacterial coating, and has a very excellent market prospect.