36results about How to "Improve deinking efficiency" patented technology

The invention discloses a deinking agent for display window glass. The deinking agent is prepared from 30-70% of water, 5-20% of inorganic base, 0.5-8% of inorganic corrosion inhibitors, 7.5-16% of organic corrosion inhibitors, 5-20% of solvent and 5-20% of penetrant, and 7-22% of mixtures composed of alkyl alcohol ether polycarboxylate, alkyl polyoxyethylene phosphate and coco glucoside are added. In the heating application process, the deinking agent is capable of preventing a solution from being layered all the time, stable in performance and long in service life; due to the fact that the corrosion inhibitors are added, in the application process of the glass deinking agent, little corrosion is caused to a glass base plate, it is not easy to scratch the window glass, and the yield rate of the panel display window glass obtained after the deinking is raised; meanwhile, the deinking agent is great in penetrability, moderate in alkalinity and high in ink removal speed.

The invention discloses a newsprint neutral voiding method in the pulping paper making technique domain with pulping, floating, scrubbing and bleaching procedure, which is characterized by the following: adapting flotation-scrubbing method without alkali; inputting 0.1 úÑ-2.0úÑ voiding agent, 1úÑ-6úÑ inorganic salt in the floating course; controlling the floating paste density between 2 and 18 percent, temperature between 20 and 70 deg.c, pre-impregnated time between 0 to 40 min, floating time between 10 and 60 min, insulating time between 0 and 40 min; The method improves the voiding efficiency and voiding paste whiteness by 16.6 percent as well as reduces the CoDcr in the neutral voiding waste-water by 190mg/l, which lessens the waste-water pollution load.

The invention further discloses a method for making paper from waste paper. The method includes the following steps of 1, pulping, wherein the waste paper is put in a 60 DEG C constant-temperature water bath tank to be heated, the concentration is adjusted to range from 4% to 6%, and the waste paper is added into a stirrer to be pulped for 40 min; 2, deinking, wherein deinking is carried out through a floatation washing method, wherein a deinking agent is a mixture of an acrylonitrile-butadiene-styrene copolymer, potassium oleate and octaphenyl polyoxyethyiene at the ratio of 3:2:1; 3, impurity removing, wherein printing ink particles in paper pulp are removed; 4, decoloring, wherein the paper pulp is bleached through white rot fungi, printing ink fine particles in the paper pulp are removed again, the PH value is controlled to range from 3 to 5, and the temperature is 40 DEG C; 5, secondary impurity removing, wherein impurities of the bleached paper pulp are removed; 6, forming, wherein wet paper web is formed through a net feeding device; 7, drying, wherein the wet paper web enters a pressure-shoe-shaped squeezing part for dewatering pressing, the squeezed wet paper web enters a drying cylinder to be dried, and the finished paper is obtained after cutting.

The invention relates to a waste paper deinking and stickies control technique which comprises the steps of crushing pulp, high concentration deslagging, coarse screening, fine screening, primary flotation, thermal dispersion, whitening, post-flotation, washing and filtering, wherein 1) adding soap deinking agent KLS-100 in the crushing pulp process; adding the soap deinking agent KLS-100 and polyethers surface active agent PA300 mixed deinking agent in the processes of primary flotation and post-flotation; and 2) in the washing process, adding optimyze 525 bio-enzyme, simultaneously adding resin dispersing agent B2281 while using the bio-enzyme, and controlling the pH value of sizing agent to be 7.0-7.5 in the adding process. The technique is used for waste paper deinking pulp, obviously improves the deinking efficiency, leads the whiteness of the deinking pulp to be increased to 74% ISO from 70% ISO, and reduces the length of printing ink stickies stuck on a paper machine scraper to be 5cm from 30cm, thus obviously reducing the times of cutting off paper of the paper machine, and improving the quality of the paper and the operating efficiency of the paper machine.

The invention relates to a method for dipping pulping white water to void ONP/OMG mixed waste paper to produce pulp. The invention is characterized in that 1, using the white water in paper industry into whole void product line, 2, putting biological void agent and chemical void agent into drum pulper on the void product line, while the biological void agent is 0.09-0.1% and the chemical void agent is 0.5-0.8%, putting chemical void agent into pre-floating selecting groove and following floating selecting groove as 0.25-0.5% relative to the pulp, 3, adding alta-mud into white water pool as 5ppm. The invention can reduce clean water consumption, reduce dust and sewage discharge and discharge COD value, to improve white degree for 3-5% and void efficiency.

The present invention provides methods for deinking wastepaper by combined use of cutinase and chemical reagents, which relates to the field of enzyme engineering. The method comprises the following steps: pulp preparation, enzymatic hydrolysis, pulp washing and dewatering, and flotation. The enzyme for enzymatic hydrolysis is cutinase at a concentration of 10-20 U/g absolute dry pulp; and 0.5-4% Na₂SiO₃, 0.1-0.8% MgSO₄, 0.1-0.8% EDTA, 0.1-4% H₂O₂ are used in the chemical treatment. With combined use of enzymatic and chemical treatment, the present invention has solved the problem of the current enzymatic method for deinking that requires large dosage of enzymes and thus high cost. Through proper choice of the kind and the amount of chemical reagents, synergistic effects of the enzymatic and chemical treatment can be achieved, thus increasing the effectiveness of the deinking process. In addition, this method does not require alkaline chemicals, which alleviates the problem of sewage treatment associated with conventional deinking methods.

The invention relates to a magnetic separation and deinking method for waste paper, comprising the following steps: (1) adding waste paper and magnetic seeds in a pulper, adding water, sodium silicate and NaOH for repulping, wherein the repulping conditions are as follows: the magnetic seed dosage is 0.05-0.2wt%, the dosage of sodium silicate is 2-10wt%, NaOH is used to regulate the pH value to be 7-10, and the pulp concentration is 10-15wt%; (2) adding water for diluting after water paper repulping until the pulp concentration to be 0.5-4wt%, adding flocculant which accounts for 0.01-0.1wt% of dry paper into the pulp after repulping for magnetic seed flocculation, enabling the deciduous ink particles to be adhered with magnetic seeds, wherein the pH value is 7.0-11.0, the time is 10-30min, and the stirring speed is 200-1000rpm; and (3) separating the flocculated ink particles from the pulp by a deinking device for size after magnetic seed flocculation. The method in the invention can obviously improve pulp whitness and fiber yield of water paper, and can be used for producing deinking pulp with high whiteness and high deinking rate and small amount of paper fiber loss.

The invention unfurls a kind of float choosing slot for taking off ink of high effect. Compared with the current technique, the invention makes these changes: (1) add water current occur fix in front of the stairs spreading fix, the mixing equipment is made by air fix and water current occur fix; (2) change the last tube of the stairs spreading fix to the gradual spreading tube; (3) in the float choosing slot, there is float board and formatting the paragraph. By the float board, we can control the liquid stopping time in the float choosing slot, make the ink grains float to the surface, collect them by most in the spirit collection slot.

The invention discloses a production method with the function of improving the deinking efficiency and for corrugating medium paper. The production method comprises the steps of soaking and activating, hydraulic repulping, sifting and slag removal, rubbing and centrifugal deinking, bleaching, washing and concentrating and pulp storage. A neutral deinking agent is utilized for directly rubbing andcentral deinking on waste paper fibers, through technological cooperation between printing ink activating and centrifugal deinking, printing ink is separated, the use amount of an alkaline deinking agent is reduced, the production cost for waste paper making is further reduced, the deinking efficiency is improved, the deinking rate is increased, the whiteness is improved, and the pollution to theenvironment is reduced.

The invention relates to the technical field of experimental equipment manufacturing and provides laboratory ultrasonic waster paper deinking equipment. The equipment comprises a stirring drum and a reactor, the stirring drum is capable of rotating horizontally, the top of the stirring drum is provided with an opening, the reactor comprises a regular polygonal structure and a cylinder, the regularpolygonal structure is used for being inserted into the stirring drum, and the cylinder is used for sealing the opening. The regular polygonal structure is an airtight cavity, and a plurality of ultrasonic transducers are arranged on the inner wall of the airtight cavity. The inner side wall of the stirring drum is provided with a plurality of crushing teeth, and the bottom of the stirring drum is provided with a plurality of defibering teeth. By arrangement of the ultrasonic transducers in the reactor, great ultrasonic action nearby the inner wall of the stirring drum can be achieved throughthe hollow structure of the reactor; under the dual actions of stirring and ultrasonic, waste paper is deinked through compression water flow and ultrasonic cavitation, and great deinking performances and high treatment speed are realized.

The invention discloses a flotation deinking machine for removing ink in waste paper pulp by utilizing an air flotation principle, wherein the flotation deinking machine comprises a closed flotation tank body, the flotation tank body comprises an outer cylinder body and an inner cylinder body, an ink discharging device is arranged in the inner cylinder body, and a plurality of accepted pulp conical grooves are arranged outside the inner cylinder body in the axial direction at intervals; a flow guide ring is arranged between the periphery of each accepted pulp conical groove and the outer cylinder body, the flotation tank body is divided into multiple stages of flotation units which are arranged up and down by the flow guide rings, pulp inlet jet distributors are arranged at the positions,corresponding to the flotation units, of the outer wall of the outer cylinder body, and spiral ascending ladder type pulp inlet flow channels are formed in the flow guide rings; a cone-like reinforcing device is arranged in each accepted pulp conical groove; each pulp inlet jet flow distributor is of a three-body structure formed by sequentially connecting a pulp inlet conical pipe, a distributionpipe and a pulp outlet conical pipe. The flotation deinking machine has the remarkable advantages of high deinking efficiency, high whiteness of deinked pulp, good brightness, high concentration of discharged ink, little fiber loss, small occupied area and the like, and meets the requirements of the modern paper making industry on the quality of paper pulp.