6 results about "Black liquor" patented technology

The invention relates to a polymer composite material filled with industrial lignin as well as a preparation method and an application thereof. The polymer composite material is characterized in that substances forming the polymer composite material comprise rubber A, lignin and a third constituent, wherein the ratio of the oven dry parts by weight of the substances in the polymer composite material is 100:(10-300):(0-100); the rubber A is natural rubber or synthetic rubber produced by an emulsion polymerization method; the lignin is hydroxymethylation modified lignin produced from alkali lignin or black liquor; in a technical scheme in which the oven dry part by weight of the third constituent is greater than 0, the third constituent is one or the combination of more than two of other rubbers or plastics except the rubber A, or a plasticizer or operating oil, or argil, montmorillonoid, kaolin, kieselguhr or calcium carbonate, or papermaking pulp taking calcium carbonate as a main ingredient, or alkali-preparing waste, namely, white clay; the polymer composite material filled with the industrial lignin is of a block form or a powder form. According to the polymer composite material filled with the industrial lignin as well as the preparation method and the application thereof disclosed by the invention, the manufacturing cost is further decreased, and wastewater generated during the production process is further reduced.

The invention relates to a method for preparing organic-inorganic mixed fertilizers from corn stalks by using pulping black liquid by a KOH and NaOH mixed soda pulping process, and belongs to the field of paper making and fertilizer production. The method comprises the following process work procedures that corn stalk raw materials are prepared; corn stalk raw materials are fed into a roller type straw cutting machine to be cut; after the cut, stalk fragments enter a dust remover to be subjected to dust removal; the materials are conveyed by a scraper conveyor; the materials are fed into a spiral pre-soaking machine to be soaked; intermittent steaming and boiling is performed in a steaming ball; the materials are fed into a spraying and blowing cabin to be subjected to thick paste spraying and blowing; black liquid is extruded through a single-spiral slurry extruding machine; the black liquid is stored by an underground slurry storage pool; the black liquid is conveyed into an organic fertilizer workshop for preparing the organic fertilizer. The organic-inorganic mixed fertilizer prepared by the invention belongs to the organic fertilizer with various fertilizer effects; the fertilizer effects are high; the functions are complete.

The invention relates to an achieving method for chestnut shell stream processing. The achieving method is characterized by comprising the following steps that firstly, a step-shaped road surface is provided, and a high-step road surface comprises a digesting tank formed in the step-shaped road surface; secondly, a centrifuge dripping crushing device is arranged on a low-level road surface; thirdly, a cyclone type drying cylinder is arranged on the low-step road surface; fourthly, digesting is carried out through introduction of steam, and after digesting is carried out for preset time, chestnut shells in the digesting tank are pushed into a rotary cylinder on the low-step road surface; fifthly, the chestnut shells are crushed through relative rotation and extrusion and through cooperation with an abrasive disk; sixthly, crushed chestnut shells in the rotary cylinder are sucked into a cyclone type drying machine through a negative-pressure material guiding pipe, and solid-steam separation is carried out; and seventhly, after the chestnut shells in the rotary cylinder are transferred, spraying type drying is carried out on black liquor. The method is simple, stream processing of the chestnut shells can be achieved, and the chestnut shell processing efficiency is improved.

The invention relates to a sulfate pulping residue slurry recovery system which comprises: a residue slurry tank used for storing residue slurry; a filtering device which is connected with the slag slurry tank and is used for separating the slag slurry conveyed by the slag slurry tank to obtain filter residues and filtrate; a filter residue treatment device which is connected with the filtering device and is used for recycling the filter residues; a pulp washing device which is connected with the filtering device, wherein the filtrate is conveyed to the pulp washing device through the filtering device to serve as washing water of the pulp washing device; and an alkali recovery device which is connected with the pulp washing device and is used for recovering black liquor generated by the pulp washing device. The slag slurry recovery system for sulfate pulping is simple in structure, low in treatment cost and environmentally friendly, and slag slurry can be effectively recovered and treated. In addition, the invention further provides a sulfate pulping production line which also has the technical effects.

The invention provides a system and method for extracting lignin in papermaking black liquid. The system comprises a feeding unit, an ultrafiltration unit, a nanofiltration unit and a water producingunit which are connected in sequence. The system is used for extracting the lignin in the papermaking black liquid, so that the extraction rate of the lignin in the papermaking black liquid reaches 100%, and the purity of the purified lignin can reach 98%. Building of a large quantity useless equipment and energy consumption are avoided, the aim of efficient, stable and low-cost extraction is achieved, the lignin with the molecular weight of 20000 or above and the molecular weight of 200-400 with pigments can be separated in the separation process, the aims of layered collection and precise treatment are achieved, and a very good separation effect is achieved. Meanwhile, compared with generalized channels such as application to a low-grade adhesive, the solid content of the black liquid can be concentrated to 24% from 8%, and the system and method have good application prospects in industrial production and application.