273results about How to "Good filterability" patented technology

The invention discloses a method for preparing tobacco sheets and an application of the method. In the method, enzymolysis is implemented when the tobacco stalk and the tobacco powder are soaked, solid-liquid separation is implemented after extraction, the solids are made into fiber sheet substrates, liquid is made into concentrated solution by alcohol precipitation and concentration, the concentrated solution is made into coating liquid by maillard reaction and coated on the fiber sheet substrates, and the fiber sheet substrates are dried and cut into tobacco sheets. In the invention, the macromolecular compounds that influence the quality of the tobacco sheets are sufficiently degraded by enzymolysis, the content of the impure taste in the tobacco sheets is decreased, the internal quality of the tobacco sheets is improved, and better aroma is obtained by the technical solution that produces prospective aroma by the maillard reaction to provide a rich aroma for the tobacco sheets so as to obtain tobacco sheet products fitting different types of cigarette products and having better internal quality. The tobacco sheets prepared by the method have excellent compatibility and harmonywith the conventional raw materials of the cigarettes, and have the advantages of good cigarette taste, various and rich aromas and less impure taste.

The present invention discloses a pressure filter, which comprises multiple groups of filter plates, wherein the adjacent filter plates are arranged in a contact manner, and each filter plate is provided with a material channel and a pressure filtration space with a variable volume and for accommodating a material. One end of the material channel is communicated with the pressure filtration space, and the other end is communicated with the pressure filtration space of the adjacent filter plate. Each filter plate is further provided with an air channel for communicating the filter plate pressure filtration space and a liquid channel for communicating the pressure filtration space of the adjacent filter plate. Filter screens are arranged on both sides of the filter plates and are positioned inside the adjacent pressure filtration space, wherein a filter cloth is covered outside the filter screen. The pressure filter of the present invention has characteristics of fewer components, simple and reliable structure, and low equipment maintenance workload. The present invention provides a pressure filtration method. According to the pressure filtration method of the present invention, two-stage pressure filtration and one-stage drying are adopted, wherein the first stage is that a driving pump is adopted to feed the material to carry out pressure filtration, the second stage is that high pressure air pressurizes the filter cloth to carry out pressure pressing, and the third stage is that the material is dried with high temperature air, such that pressure filtration efficiency is improved, and effects of automatic material unloading and filter cloth cleaning are achieved through the high pressure air.

The invention relates to a tailing cemented and filled retaining wall device under a mine. The device comprises a roadway, a wall body and a plurality of dewatering pipes. The wall body divides the roadway into an internal part of a mining area and an external part of the mining area. The wall body comprises a filter fabric, a plurality of layers of stone cages and a plurality of retaining wall crosspieces. The stone cages are filled with mining waste rock. A concrete foundation is arranged below the lower layer of stone cages. The dewatering pipes are arranged in the concrete foundation. Water outlet ports of the dewatering pipes are arranged at the external part of the mining area and water inlet ports of the dewatering pipes are arranged at the internal part of the mining area. The filter fabric is laid on the outer surface of layers of stone cages at the internal part of the mining area. The retaining wall crosspieces are arranged at an upper layer and a lower layer and are fixedly arranged outside the layers of stone cages at the external part of the mining area. Gaps among the two sides and the top of the wall body and the walls of the roadway are blocked and sealed through concrete. The tailing cemented and filled retaining wall device under the mine has the characteristics of excellent wall body stress performance, good slurry retaining effect, good water filtering effect, high erection speed, simplicity and convenience in construction, low cost and the like. At an early filling stage, the dewatering capacity of the retaining wall device is 7-10 times of that of a concrete enclosure wall.

The invention discloses an organic high molecular composite flocculant which is mainly used for municipally or industrially dewatering sludge and a preparation method thereof, which solve the problems of complex treatment process, agent waste, secondary pollution and the like existing in the prior art. The flocculant comprises polyacrylamide, polydimethyldiallylammonium chloride and modified starch serving as raw materials and the dry weight ratio of polyacrylamide to polydimethyldiallylammonium chloride to modified starch is 4-9:0.5-5:0.5-5, wherein tap water or de-ionized water is used as a dispersing agent; and the liquid organic high molecular composite flocculant, of which the molecular weight is 4,000,000 to 12,000,000, the ionization degree is 40 to 80 percent and the effective content of the raw material is 1 to 5 percent based on dry weight, is prepared by dispersing the materials in a reactor at the temperature of between 10 and 50 DEG C with stirring and compounding for 0.5 to 3 hours. The flocculant has the advantages of sufficient raw material sources, low cost, simple process flow, stable performance and high suspension separation speed, is reasonably prepared and quickly dissolved and is safe to operate, and convenient to use, saves the amount, obviously improves the dehydration efficiency, expands the application range, prevents fluctuation of treatment effect and reduces secondary pollution.

The present invention relates to the extraction process of acid out lignin, and is especially the process of treating waste digestion liquid produced during making paper pulp to extract lignin. The extraction process includes depositing separation to eliminate fiber mud and silt from black liquor, cooling black liquor containing lignin, adding flocculent and acid to deposit lignin, and filtering to obtain lignin containing product. The said process has high lignin extracting rate up to 95 %, and the obtained lignin has excellent water filtering performance and dryness over 25 %.

The present invention discloses a Reynolds experiment instrument. It is characterized by that in the constant pressure zone of its constant pressure water tank a permeation cover is set, said permeation cover can be used for covering upper portion of water inlet of experiment tube, the space covered by said permeation cover is formed into a water-stabilizing zone, and the water body in the water-stabilizing zone of said experiment instrument can not be interfered by water of water inlet tube.

The invention relates to a technique for treating polluted environment, which in detail is a comprehensive ecological restore method especially for etrophication waters in temperate zone in part of China. It combines the cultivation of large scale of algae and culture filter feeding animal of in etrophication waters to build a biological filter device and then restore polluted environment. The invention makes full use of ecological function of large scale algae absorbing dissolved nitrogen and phosphorus in large amount and ecological function of filter feeding animal filtering suspended particle and nutrient matter from water, to restore etrophication waters. The applied algae and filter feeding animal are important economical varieties, thus they can also bring economical benefit. The invention is characterized by both ecological benefit and economical benefit and suitability for etrophication waters in temperate zone in north of China.

Provided are a novel process for producing cellulose nanofibers, and novel cellulose nanofibers. The process comprises fibrillating a pulp with a single-screw or multi-screw kneading machine in the presence of water to produce cellulose nanofibers, wherein the fibrillation is conducted in a manner such that the peripheral speed of the single-screw or multi-screw kneading machine is 45 m / min. Thus, cellulose nanofibers superior in both water filtration efficiency and sheet strength, which have been thought to be inconsistent properties, are obtained.

The invention is a producing method of paper pulp boiling agent, its raw materials comprising penetrating agent BS 4-10 weight shares, sodium bisulfate 4-10 weight shares, sodium chloride 4-10 weight shares, pleregal 0 15-25 weight shares, polyoxyethylenated alcohol 15-25 weight shares, alkyl sulphonate 40-55 weight shares, and water 60-80 weight shares. The producing process: adding the pleregal 0 and polyoxyethylenated alcohol in the 55-65 deg.C water, heating to 70-75deg.C, blending, and adding in alkyl sulphonate, blending and adding in BS, sodium bisulfate, sodium chloride, blending, cooling to 30-40deg.C, and blending to make the finished product.

The invention relates to a non-asbestos fiber compound sealing material, in particular to a high-performance paper-making method material, and belongs to the cross field of material science and paper-making technology. The non-asbestos fiber compound sealing material consists of non-asbestos fiber, rubber latex, mixed inorganic fillers and an auxiliary agent, wherein the mixed inorganic fillers are formed by the gradation of minimum two types, at most six types of fillers of different average grain sizes, and the average grain size of the bigger fillers is more than 2.5 times that of the adjacent smaller fillers. Because the closest packing theory is adopted in the invention and the fillers are formed by the gradation of the fillers of different average grain sizes, the close packing microporous material structure can be obtained while less rubber latex is consumed, various important indexes, such as the sealing property, mechanical strength and heat resistance, of the product are greatly improved, and the high-performance non-asbestos fiber compound sealing material is obtained. By the gradation of the fillers, the paper machine paper-making property of the pulp is improved.

The invention discloses a recyclable steel structure filled retaining wall which comprises a composite wall formed by overlaying a plurality of wall fixing round steel bars, an I-shaped steel structural wall, a mesh and water filtering cloth together in sequence, wherein the composite wall is mounted between a goaf and a roadway; I-shaped steel supports and a plurality of supporting and fixing round steel bars are arranged on the back surface of the composite wall for fixation; the composite wall fixing round steel bars are arranged on the periphery of the composite wall at intervals; the tail ends of the composite wall fixing round steel bars are anchored into surrounding rocks to be fixed; the supporting and fixing round steel bars are anchored into the bottom of the roadway; shotcrete is arranged between the composite wall and the roadway. The recyclable steel structure filled retaining wall is novel and reasonable structural design, convenient to construct, high in supporting strength, high in safety performance, good in sand blocking and water filtering effects, capable of being detached and reused, and low in comprehensive cost.

The invention discloses a method for preparing super-high-bulk paper pulp from fir slabs. The method is a process for producing bleached pulp boards according to the chemical hot-grinding technology, and comprises the following steps: slicing, pre-boiling, extruding, soaking, pre-heating, defibrination, secondary defibrination, screening and purifying, bleaching and papermaking. The method has the advantages that the prepared paper pulp is high yield, bulk, whiteness, drainability, tenacity, stiffness, ink absorption and compressibility, so that the print performance of the prepared paper pulp can be improved; the production cost and the sewage emission are low; the sewage is easy to treat; the prepared paper pulp can be used for producing of light paper, cup base paper and other types of paper requiring high bulk.