48results about How to "Simple pulping process" patented technology

The invention relates to a clean pulping catalyst and its application process. The clean pulping catalyst of the present invention is composed of the following raw materials: sodium salicylate, anionic silicic acid softener, cooking aid, chlorine (gas) and water. The application process of the clean pulping catalyst of the present invention includes the following steps: 1. Crushing and removing impurities from raw materials; 2. Prepare materials and remove impurities; 3. Combing and splitting; , pulp bleaching; 8, pulp washing; 9, finished pulp. Various herbaceous fiber plants can be used as raw materials. The advantages of the present invention are: the present invention realizes clean production, it does not need cooking, does not produce black liquor; its process is simple; it can be carried out under normal temperature and pressure; fully utilizes crop resources; water saving is obvious: it is easy to realize continuous production, Modular production and automatic production, and can realize industrialization.

The invention relates to a low energy consumption clean paper pulp extracting method and a papermaking process thereof, solving the problems that fibrous raw materials need to be boiled at high temperature and pressure in the pulp preparing and papermaking processes and chemical solutions produce a large quantity of black or red liquid in the pulp preparing and papermaking processes to cause great waste to resources and great pollution to the environment in the prior art. The invention adopts the following technical scheme: the low energy consumption clean paper pulp extracting method is realized by removing impurities from biomass raw materials rich of fiber, crushing, softening and soaking, separating organic matters, grinding and pulping, wherein a softening and soaking solution contains the following components in percent by weight: 10-20 sodium oxide, 3-5 sodium carbonate, 0.5-2.5 penetrating agent T, 0.5 magnesium oxide and 0.05-0.15 chelating agent EDTA. The papermaking processmatched with the method comprises the following steps: getting materials ready, rubbing to devillicate, soaking to react, separating liquid medicine, spirally squeezing pulp, refining with high consistency, removing slag, coarsely screening and making paper. The pulp preparing process has simple course, no high requirements on environment and equipment condition, easily popularized technology, norequirement on the scale of production, low costs for building production lines and purchasing equipment and less running expense.

The invention discloses sludge coal-water slurry and a preparation method thereof. The sludge coal-water slurry comprises the following components in parts by weight: 5-30 parts of water-treatment sludge, 5-30 parts of printing and dyeing wastewater, 0.0005-0.1 part of modifier, 60-70 parts of coal powder and 10-30 parts of water. The preparation method provided by the invention has the advantages that the slurrying process is simple, and energy and the slurrying cost are saved; the added amount of the water-treatment sludge is high, and the fluidity of the modified sludge is good, so that the sludge is easy to mix with the coal powder uniformly; the slurrying concentration of the sludge coal slurry is higher than 60%, and the fluidity, the stability and the rheological property are relatively good; additives can be saved by more than 40%, water for slurrying can be partially or wholly saved, and a stabilizer can be saved by 100%; and while the heat value of the sludge is fully utilized, an effective technical path is provided for reclamation, reduction and harmlessness of the sludge.

A method and an apparatus for preparing a semisolid slurry for an automobile aluminium wheel through compound modification refinement and electromagnetic stirring. The method comprises steps of: transferring alloy with degree of superheat of 100-120 DEG C into a transit bag, adding a refinement modification agent with high purity nitrogen by an injecting device, wherein the refiner is Al-Zr-B-O intermediate alloy with a granularity of 150-200 um, and the alterant is Al-Sr-RE complex alloy with a granularity of 200-2505 um; standing for 5-8 min, pouring into an electromagnetic stirring crucible when a temperature is 40-50 DEG above a liquidus, putting the crucible in an electromagnetic stirrer, and carrying out composite stirring through a crucible peripheral stirrer and central stirrer, wherein the peripheral stirrer has a frequency of 10-20 Hz, a power of 12 kw, a rate of 300-500 rmp and a time of 2-3 min, and the central stirrer has a frequency of 5-15 Hz, a power of 1-2 kw, a rate of 300-800 rmp and a time of 2-3 min; stopping stirring, when a melt temperature drops to 10-15 DEG C below the liquidus, to obtain a near sphaerocrystal structure semisolid aluminium alloy slurry. The method solves problems of nonuniform slurry and low pulping efficiency.