273results about How to "Good filterability" patented technology

The present invention relates to a polylactic acid filter rod for cigarette. It is made up by using polylactic acid tow for cigarette through the processes of opening, adhesive bonding, bundling, cutting and after-treatment, its filament linear density is 2-8 dtex, its tow linear density is 3-6 ktex and its crimp ratio is 15-30/25 mm. The contacted parts of adjacent fibers are mutually bound and all fibers in the rod are cohesive together to form communicated 3-D network structure.

The invention relates to an oxygen delignification processing method of grass unbleached chemical pulp. The oxygen delignification of the pulp is processed after cooking and before bleaching. Its rigidity before the oxygen delignification is potassium permanganate value 16-28 (equals to karber value 26-50). After pumping into the oxygen delignification reaction tower and inflating sodium hydroxide, magnesium salt and oxygen, the chemical pulp happen the oxygen delignification in the reaction tower. The chemical pulp with rigidity of potassium permanganate value 10-14 (equals to karber value 14-18) is achieved after the oxygen delignification. The invention can remove the lignin in the pulp effectively and the removal rate is 86-98%. It reduces the degradation of the cellulose to simplify the bleaching process and cut down the dosage of the chemicals. The bleached pulp has good rigidity and drainability. The breaking length of the pulp can reach 4500-8000m and its fold-resistant times can reach 20-70.

The invention discloses a sparingly soluble active component particle, a particle preparation and a preparation method thereof. The preparation method of the sparingly soluble active component particle comprises the following steps: dissolving sparingly soluble active component and ionic polymer into an alkaline solution or an acidic solution, and then mixing the alkaline solution and acidic solution to change the pH value of solutions so as to precipitate the sparingly soluble active component and ionic polymer from the mixed solution to form particles; and the performance of the sparingly soluble active component particle is improved. According to the preparation method, sparingly soluble active component and ionic polymer are co-precipitated, at the same time, a preparation technology is adopted, and two technologies are tightly combined to prepare the sparingly soluble active component particle preparation. The prepared preparation has the advantages of excellent dissolving-out characteristic, high bioavailability, small individual difference, good stability, and good content uniformity.

The invention provides a method for improving the performance of paper stock in retention and drainage aiding. The method comprises the following steps: firstly, dispersing plant fiber materials for papermaking in water, beating the plant fiber materials with the beating degree being controlled to 25 to 70 DEG SR (Schopper-Riegler); secondly, feeding the evenly mixed slurry into the approach flow system of a paper machine, and adding CPAM (cationic polyacrylamide) as retention agent before feeding the slurry into a fan pump of the approach flow system; then, adding electronegative bentonite before feeding the slurry into a pressure screen or a head box, and adding APAM (anionic polyacrylamide) before feeding the slurry into the head box; and finally, papermaking forming on the paper machine, drying and obtaining the qualified paper. By adding excessive CPAM to the paper machine, the invention allows the action between CPAM and bentonite to form fine particles, and the further combination with APAM to form floccules, thereby providing draining channels in good conditions and further improving the drainage capacity during the forming process of the paper stock.

The invention discloses a composition for changing and improving the property of a fiber surface. The composition consists of the following components: a protein component without catalytic activity and a protein component with catalytic activity, wherein the protein component without catalytic activity is fibronectin with higher affinity to the fiber surface; the protein component with catalytic activity is fiber modified enzyme which can change the property of the fiber surface; and the weight ratio of the fibronectin to proteins of the fiber modified enzyme is between 1:(0.1-1:10). The invention also provides a method for applying the composition to paper making. When the composition is used for treating paper pulp, the drainage capacity of the paper pulp is greatly enhanced, and the intensive property of paper is remarkably enhanced.

The invention relates to a whole black liquor large liquor rate cercal grass cooking technology with digester, comprising the following steps: after stocking, preimpregnating the grass raw fiber; loading the preimpregnated raw material into cooking equipment to perform first stage boiling washing to discharge black liqucd of high concentration to obtain straw pulp intermediate product; supplying cooking liquor to the said cooking equipment, and second stage boiling washing the straw pulp intermediate product, and then straw pulp being obtained through washing; repective cycle operating ryegrass large liquor rate displacement cooking and ryegrass large liquor rate displacement cooking black liquor and implementing grading displacement cooking in cooking pan, the research and design of cooking pan grading displacement cooking technology and the corresponding device design and parttern selection being done. The said technology can be used in rebuilting the domestic ryegrass pulp mill. The pulp strength can be enhanced and the quality of the waste liquor is improved. The invention benifits for recovery processing and reduces the discharge of the waste liquor and BOD, COD.

The invention discloses a manufacturing method of a beverage drinking straw paper. The method comprises the technical processes of pulp beating, pulp blending, additive adding, wet paper making, pre-drying, surface sizing, after-drying, calendaring and rolling. The beverage drinking straw paper belongs to papers for foods and meets the sanitary requirements on the papers for foods. The beverage drinking straw paper is manufactured by choosing preferable raw and additive materials and chemicals and taking chlorine-free bleached softwood kraft paper pulp and chlorine-free bleached hardwood kraftpaper pulp as fiber raw materials, which contain no toxic chemical substances such as organic chlorides and are environmentally friendly, sanitary and free from damage to human body. The produced beverage drinking straw paper is high in dry strength and wet strength, free from breakage, high in humidity resistance and capable of being rapidly decomposed to meet the environmental requirements as we as the sanitary requirements on the papers for foods.

The invention discloses a pressure filter comprising a plurality of filtering plate sets which are connected in sequence, wherein each filtering plate set comprises a main plate, an auxiliary plate, and an auxiliary frame, the auxiliary plate is fixed on one side of the main plate and on the same side of the main plate, the auxiliary frame is sleeved on the periphery of the auxiliary plate in a sliding mode, and the other side of the main plate is connected with the auxiliary frame of the adjacent filtering plate sets. Moreover, volume-changeable pressing filtering space used for containing materials is arranged between the adjacent filtering plate sets. Each filtering plate set is provided with a material channel which is communicated with the pressing filtering space. The other side of the main plate, opposite to the contact face of the auxiliary plate, is provided with a filtering mesh. Filter cloth wraps outside the filtering mesh. Each filtering plate set is also provided with a gas channel and a liquid channel which are communicated with the outside to the pressing filtering space. The pressure filter is high in structure reliability, has no leakage of the materials, and is convenient to maintain. The invention further provides a pressing filtering method. As pressing filtering and drying above the third level are adopted, water-filtering effect is better, size of the pressed and filtered material is larger, water containing rate of the materials is lower, work efficiency is higher, and production is higher.

The invention relates to a poplar ultrasonic chemical mechanical pulping technique. The pulping technique includes the steps: performing ultrasonic pretreatment on steamed poplar pulp after first stage impressafining; performing xylanase pretreatment on the pulp after the ultrasonic pretreatment; soaking the pulp in soda hydrogen dioxide solution after pretreatment; performing second stage impressafining after soaking; performing second stage soaking on the pulp in the soda hydrogen dioxide solution after the second stage impressafining; performing first stage refining on the pulp with the soaking liquid; performing high concentrated storage and bleaching after the first stage refining; and performing second stage refining to obtain high-brightness high-yield high-strength chemical mechanical pulp. The poplar ultrasonic chemical mechanical pulping technique can improve the mechanical pulping performance of fast-growing poplar, enlarge the application range of poplar high-yield pulp, improve the performance of poplar paper pulp, and improve the use value of the poplar.

The invention relates to an algae setting material, which comprises 5 to 70 percent of natural fiber material and 30 to 95 percent of natural high polymer material, wherein, the natural fiber material is selected from plant fiber and/or animal fiber, and the natural high polymer material is selected from crab derivatives and/or shrimp derivatives and plant viscous juice with a proportion no less than 5 percent. The algae setting material is the natural substance without any harm to human bodies, livestock, environment as well as aquatic animals and plants, and has coagulation, adsorption, tangling and enmeshing function for the algae. When the use amount of the algae material is 0.1 to 10mg/L, the removal efficiency of the algae is over 95 percent. The obtained algae setting body of the flocculation has strong holding power, good performance of floating and drainability, little algae mug and convenient post-process, so the invention is applicable to urgent treatment of burst red tide in ease water and water bloom in fresh water.

The invention relates to a VOCs (volatile organic compounds) waste gas treatment combination device and belongs to the technical field of air purification. A filter, an adsorption fan and a treatment zone of a concentration runner are connected sequentially through pipelines, gas is filtered, adsorbed, purified and released to the atmosphere, an output end of the adsorption fan is connected with a cooling zone, a heating pipeline of a second heat exchanger, a regeneration zone, a desorption fan, a heating pipeline of a first heat exchanger and an input end of a combustion device are connected sequentially through pipelines, an output end of the combustion device, a cooling pipeline of the first heat exchanger and a cooling pipeline of the second heat exchanger are sequentially connected, the concentration runner is driven by a motor to rotate, the filter comprises an upper chamber and a lower chamber, four filtering cavities are formed in the upper chamber from an inlet to an outlet sequentially, and coil pipes and water baffles are arranged in the filtering cavities respectively. The early filtration effect of the device is better, the conditions that other pollutants react with VOCs and impurities are decomposed and generate other pollutants when heated are prevented, and the waste gas treatment effect is remarkably improved.

The invention discloses a method for reinforcing aeolian sandy soil by polypropylene fibers. The method comprises the following steps: selecting materials for preparing fiber aeolian sandy soil, wherein the length of the polypropylene fiber is 18mm, the mix ratio of the fiber is 0.3 percent, and the aeolian sandy soil materials are air-dried aeolian sand or aeolian sandy soil (the moisture content accounts for 11.2wt%); according to the proportioning scheme, closely and completely mixing fine TEXSOL with aeolian sandy soil particles by way of spraying, so that a composite three-dimensional spatial structure is formed by the TEXSOL and the aeolian sandy soil; and carrying out mechanical compaction on the composite fiber aeolian sandy soil subjected to spraying, wherein the compaction method and standard of the composite fiber aeolian sandy soil are same as those of common soil, so that the compaction density of the aeolian sandy soil reaches 100 percent of the standard compaction density, and the fiber aeolian sandy soil is compacted closely. By utilizing the method in earth-filled dams, retaining walls and the drainage works of the earth-filled dams, the water stability of the interior of the soil body can be effectively improved, the shearing strength and tensile strength of the soil body can be obviously improved, and the construction process is simple; and because the fiber content of the fiber aeolian sandy soil is very low, the method has the advantages of cheapness and environmental protection.

The invention discloses a preparation method of heat-resistance and salt-tolerance polyacrylamide. The preparation method comprises the following steps: taking the aqueous solution of acrylamide with the mass concentration of 20-30 percent, adding acrylic acid accounting for 1-2 percent of the mass of an acrylamide monomer and 2-acrylamide-2-methylpropane sulfonic acid (AMPS) accounting for 2-6 percent of the mass of the acrylamide monomer, adding sodium hydroxide for regulating a pH value to 5.5-6.5, cooling to 0-4 DEG C, introducing nitrogen to remove oxygen out of the system, sequentially adding a complexing agent, an azo initiator, an efficient chain transfer agent, a reducing agent and an oxidant when the oxygen content in the system is smaller than 0.01 percent, sealing after reaction is finished, preserving heat for 1-1.5h, then taking out colloid, putting the colloid in a hydrolyzer, adding an inorganic alkali liquor accounting for 6-13 percent of the acrylamide monomer, hydrolyzing at the temperature of 80-90 DEG C for 1-2h, and drying the colloid to prepare the product. The heat-resistance and salt-tolerance polyacrylamide is good in solubility and filterability, and the apparent viscosity of the heat-resistance and salt-tolerance polyacrylamide is above 11mPa.s.

A pulp and paper preparation method with zero-emission of sewage comprises the steps as follows: (1) stewing for the first time: mixing materials for preparing the pulp with a thin black liquid obtained from stewing of the second time, pre-soaking the mixture, dewatering and then stewing at a low temperature; milling and devillicating the materials after stewing for the first time by adopting a double screw pulp milling and pressing machine, extracting a thick black liquid, concentrating and drying the thick black liquid, selling the same as a commodity, adding alkali and a catalyst, intensively mixing with the materials for making the pulp to obtain a material (B); (2) stewing for the second time: stewing the material (B) at a high temperature through steam; pressing the stewed material and extracting the thin black liquid by adopting at least two double screw extruders or filter presses connected in series; using the thin black liquid in stewing for the first time for pre-soaking the materials; (3) washing the pulp and treating the water for washing the pulp: grinding the pulp material through stewing for the second time in a high consistency pulping machine; washing the pulp; the water for washing pulp is reutilized for washing the pulp after anaerobic treatment, aeration treatment, and materialized and flocculation treatment; and (4) preparing paper and treating white water: purifying thick pulp, fine-grinding by adopting a double disc refiner, using the ground thick pulp for preparing paper, and reutilizing the paper-preparing white water after treatment.

The invention discloses high-strength modified energy-saving biological enzyme paper pulp and a pulping process thereof. The paper pulp comprises 0.5-5 parts of an antibacterial agent, 1-3 parts of a toughening agent, 1-5 parts of a thickening agent, 40-60 parts of regenerated paper pulp, 10-20 parts of a packing, 1-5 parts of a defoaming agent, 2-8 parts of a stabilizing agent, 1-3 parts of a retention aid, 10-30 parts of fibers and 5-20 parts of biological enzyme. According to the paper pulp, a biological enzyme technique is adopted for beating the pulp, and the biological enzyme with the high pertinence is selected for performing synchronous pulp beating treatment on the pulp, so that not only is the energy consumption reduced and is the yield increased, but also the fibers can be modified, for example, when wood pulp beating enzyme is adopted to be matched with the beating of the wood pulp, the beating degree is improved, the fiber strength is ensured, and the power consumption in beating each ton of the pulp is reduced; when the biological enzyme is adopted for beating OCC pulp, the beating degree is reduced, the fiber strength is improved, the drainability, the pulp beating capability and the flowability of the fibers are improved, and meanwhile, the production energy consumption is reduced, the properties of the pulp are improved, and thus the quality of paper is improved.

A preparation method of non-asbestos latex beater sheets comprises: firstly dispersing non-asbestos fibers in water and pulping after adding a filler; then adding carbon black and mixing thoroughly; sequentially adding latex, sulphur and anti-aging agent and mixing thoroughly; and finally feeding the resulting mixture to the approach system of a paper making machine, adding a cationic polyacrylamide retention aid prior to the fan pump or press screen or head-tank of the approach system, adding bentonite prior to the headbox, making paper, and drying. In the invention, an appropriate amount of cationic polyacrylamide retention aid is added prior to the fan pump or press screen or head-tank of the approach system of paper making machine and sequentially an appropriate amount of bentonite prior to the headbox, so that the drainage property of beater sheet is improved after the raw material flows into the wire section of paper machine from the headbox and the beating degree of raw material in the wire section is reduced below 50oSR, thereby realizing excellent drainage and molding of raw materials in the wire section.

The invention relates to a cathode load self-generated dynamic membrane bioreactor which comprises a biological treatment system, a cathode load system and an automatic control system. The biological treatment system comprises a water inlet pump, a perforated aeration pipe, an aeration pump, a dynamic membrane module and a water outlet pipe; the aeration pump is connected with the perforated aeration pipe; the perforated aeration pipe is arranged under the dynamic membrane module; and water collection port on the upper end of the dynamic membrane module is connected with the water outlet pipe. The cathode load system comprises a direct-current voltage-stabilizing power supply, an electrode plate and a cathode load interface, wherein the anode outputted by the direct-current voltage-stabilizing power supply is connected with an electrode plate, and the cathode outputted by the direct-current voltage-stabilizing power supply is connected with the cathode load interface. The automatic control system comprises a liquid level controller and a time relay, wherein the liquid level signal outputted by the liquid level controller is used for controlling the water inlet pump to start and adjusting the water inlet amount, and the time relay is connected with the direct-current voltage-stabilizing power supply and used for controlling the electroflocculation running time. Due to the adoption of the cathode load self-generated dynamic membrane bioreactor, the stable operation cycle of the dynamic membrane is prolonged significantly.

The invention belongs to the field of inorganic salt chemical industry and fertilizer production, particularly relates to a method for producing magnesium oxide with co-production of ammonium chloride by taking magnesium carbonate hydrate as an intermediate. The method comprises the following steps of: with anhydrous magnesium chloride or bittern magnesium chloride as a raw material and with ammonia and ammonium bicarbonate as precipitating agents, obtaining the magnesium carbonate hydrate intermediate (the purity reaches 97-99 percent) with favorable crystal form by controlling process conditions; calcining the obtained magnesium carbonate hydrate intermediate to prepare magnesium oxide (the purity reaches 95-99 percent); adding salt to mother liquor enriched with ammonium salts and evaporating, salting out and cooling to separate out ammonium chloride, and filtering to obtain the ammonium chloride, wherein the mother liquor is circularly taken as a raw material. The method aims at producing needle-shaped or spherical magnesium carbonate hydrate by utilizing rich magnesium chloride brine from salt lakes, or magnesium chloride brine from seawater, or anhydrous magnesium chloride used for producing titanium sponge by-products, and other magnesium salt materials, thereby preparing high-purity magnesium oxide with the simultaneous co-production of ammonium chloride fertilizer. The method of the invention has strong maneuverability and is easy to realize industrialization.