84results about How to "Reduce dehydration costs" patented technology

The invention belongs to the technical field of comprehensive utilization of waste resources from the aluminum industry and specifically discloses a comprehensive utilization method of aluminum ash. According to the comprehensive utilization method of aluminum ash, metallic aluminium is extracted from aluminum ash through an ore grinding method; the aluminum ash obtained after aluminium extraction undergoes catalytic deamination; the aluminum ash obtained after deamination is mixed with alkali and granulation forming is then carried out; and the granulation product is sintered and the sintered product is finally dissolved out. By the above method, useful components in the aluminum ash can be recovered to the maximum; ammonia gas which has been ignored for a long time is effectively recovered; components such as aluminium oxide, villiaumite and the like are recovered and utilized to the maximum; pollution of aluminum ash processing to the environment is avoided; atmospheric dust pollution is avoided; atmospheric pollution is also avoided due to ammonia gas recovery; pollution of aluminum ash stacking to underground water and soil is avoided due to extraction and recovery of fluoride salt; and environmental safety during the treating process is guaranteed.

The invention relates to the technical field of residual sludge treatment, in particular to a process method for conditioning and dehydrating residual sludge. The method particularly comprises the following steps: (1) adding acid into the residual sludge to be treated and with the water content of 90 to 95 percent and adjusting until the pH value is between 4.0 and 6.0; (2) adding quaternary ammonium salt cationic organic matters into the conditioned sludge in the step (1) and performing hybrid reaction; (3) adding a dehydration aid into the conditioned sludge in the step (2) and stirring uniformly; and (4) adding coagulant into the conditioned sludge in the step (3) and mechanically dehydrating after mixing and stirring. The extracellular polymers on sludge flocs are stripped and partially hydrolyzed by a chemical conditioning mode, microbial cells are dissolved, a large amount of bound water is released, and the water permeability of the sludge is improved by utilizing the aid, so that the dehydration performance of the sludge is integrally improved, the water content of the sludge is reduced, the dehydration time is shortened and the dehydration cost is reduced.

The city sewage treatment process includes the following steps: utilizing grile and desilting basin to pretreat sewage, adding coagulating agent to make the phosphorus, heavy metal and orgnaic matters existed as colloid and suspended substances feed into anaerobic reactor in the form of sludge to make organic matter convert into impure methane, making the supernatant fluid pass through the next aerobic treatment reactor to remove organic matter and convert the ammoniacal nitrogen into nitric nitrogen, mixing anaerobic discharged water and aerobic discharged water, and making the mixture waterundergo the process of anaerobic treatment to make denitrifcation, finally utilizing secondary aeration and precipitation to completely remove organic matters from sewage so as to attain the goal of cleaning the sewage.

The invention belongs to the field of solid waste reclamation comprehensive utilization and particularly relates to a soil conditioner prepared from sludge and a preparation method thereof. The soil conditioner is prepared from river and lake bottom mud, conditioner, medium sand, agricultural and forestry residues, biological manure and plant ash, wherein the conditioner is 5% to 8% of the mass of the river and lake bottom mud, the medium sand is 5% to 10% of the mass of the river and lake bottom mud, the agricultural and forestry residues are 5% to 10% of the mass of the river and lake bottom mud, the biological manure is 1% to 5% of the mass of the river and lake bottom mud, and the plant ash is 1% to 3% of the mass of the river and lake bottom mud. The soil conditioner prepared from sludge disclosed by the invention achieves resource utilization of sludge, also fully utilizes sludge, tailings or river and lake sand, tailing sand, pipe network sand and agricultural and forestry residues at the same, achieves the purpose of treating waste through waste, avoids solid waste landfill, land occupancy and secondary pollution, reduces engineering cost of land reclamation, landscaping, forest land plant and the like and is beneficial to ecological environment; in addition, the river and lake sand, the tailing sand, the pipe network sand and the agricultural and forestry residues are separated and sorted from pipe network sludge.

The oil field viscous crude sewage silicone-removing cleaning technological process is characterized by that in the course ore moving silicone it has no need of regulating pH value of sewage, the active magnesium oxide can be directly added into the pretreated sewage, and after the sewage is passed through the vortex reactor and reacted, the inorganic aluminium salt anjd organic floccultant can be added in the discharge water, then fed into sludge reactor, said sludge reactor can provide high-concentration sludge, and said sludge can be fully reacted with feeding water, then fed into precipitation clearing device to implement sludge and water separation so as to obtain silicone dioxide and treated water in which the suspended matter content is lower.

The invention relates to a sludge dewatering composite flocculating agent, in particular to an inorganic-organic composite flocculating agent capable of effectively improving dewatering efficiency and reducing dewatering cost. In order to realize the goal, the invention adopts the following technical proposal that the sludge dewatering composite flocculating agent comprises the compositions of polymeric aluminum ferric chloride and cationic polyacrylamide, wherein the chemical general formula of polymeric aluminum ferric chloride is [Al2 (OH)n Cl6-n]m , [Fe 2(OH)n Cl6-n] m; moreover, n is less than 5, and m is less than 10; and the content ratio of the polymeric aluminum ferric chloride to the cationic polyacrylamide is between 2 to 1 and 5 to 1. The sludge dewatering composite flocculating agent is mainly used in sludge dewatering.

The invention discloses a deep sludge filter-pressing dehydration device and a dehydration method, and belongs to a filter-pressing dehydration device and a dehydration method. According to the device, a sludge distributing machine and a sludge discharging machine are oppositely arranged; a material distributing station and a sludge discharging and cleaning station are arranged on one side of thesludge distributing machine and one side of the sludge discharging machine respectively; a sludge filter press is arranged between the material distribution station and the sludge discharging and cleaning station; a filter pressing station is correspondingly arranged below the sludge filter press; the filter pressing station, the material distributing station and the sludge discharging and cleaning station are positioned on the same axis; filter pressing barrels are arranged on the filter pressing station, the material distributing station and the sludge discharging and cleaning station; a filter barrel automatic circulating shifter is arranged above or on one side of the filter pressing station, the material distributing station and the sludge discharging and cleaning station; and the filter barrel automatic circulating shifter is positioned on the moving tracks of the filter pressing station, the material distributing station and the sludge discharging and cleaning station. Accordingto the invention, no chemical additive is required to be added during dehydration and filter pressing of sludge, so that the cost is effectively reduced, and the operation is stable and reliable; andthe automation degree of equipment is high, and operators are not required to operate on site;

The invention discloses a compounded sludge dewatering conditioner and belongs to the technical field of sludge treatment. The compounded sludge dewatering conditioner is prepared through compounding a sludge conditioner A and a sludge conditioner B, wherein the sludge conditioner A is prepared through compounding the following ingredients in parts by weight: 20-30 parts of fly ash, 10-20 parts of quicklime powder, 10-20 parts of magnesia, 20-30 parts of polyaluminum ferric chloride; the sludge conditioner B is an acetic solution of chitosan. The invention further discloses a method of application of the compounded sludge dewatering conditioner.

The invention relates to a thickening and dewatering method for tailings. The method is suitable for thickening and dewatering fine-granule tailings adopting dry stockpiling or a comprehensive utilization plan. According to the method, tailings fed into a stirring barrel are subjected to secondary thickening by adopting a hydrocyclone so as to increase the concentration of tailings fed into a ceramic filter, overflow of the hydrocyclone and filtrate of the ceramic filter are returned to a thickening pond and mixed with fine-granule tailings discharged from an ore dressing process so as to reduce the concentration of the tailings and to increase the deposition speed of the tailings, thus finally achieving the objectives of increasing the efficiency of the ceramic filters and reducing the cost of dewatering.

The invention relates to a low temperature (30 DEG C) demulsifier and a preparation method thereof. The demulsifier comprises by 40-45% of multiple block polyether, 1.5-2% of triethanolamine, 2-2.5% of oleic acid and 20-50% of methanol and the balance of water, calculated by the weight of the demulsifier being 100%. The low temperature demulsifier of the invention has dehydration rate of 91.6% to crude oil of Changqing ultralow permeability reservoir under the conditions of 50 ppm and temperature of 30 DEG C.

The invention discloses a rapid dewatering device for printing and dyeing processing. The device comprises a dewatering box, a third guiding roller, a fourth guiding roller, a tension adjusting device, an extruding roller set, a fifth guiding roller, a partition plate, a water collection groove, a material guiding channel, a sixth guiding roller, a fabric flapping device, a leveling roller set, awater collecting tank, a water pipe, a heat supply device, a first air inlet, a first air outlet, a second air inlet, a second air outlet, an air supply pipe, a first exhaust fan, a second exhaust fan, a heat supply pipe assembly and an air jet head; one side wall of the dewatering tank is correspondingly provided with a fabric inlet and a fabric outlet up and down. The rapid dewatering device canachieve the purpose of repaid dewatering by adopting a combination mode of extruding roller dewatering and hot air drying for conducting dewatering operation on textile fabric, the dewatering effectis good, and the efficiency is high; by adopting an integral structure design, the structure is compact, the occupation space of the dewatering device is greatly reduced, the structure is stable, theeffect of energy saving is achieved, and the dewatering cost during printing and dyeing processing is reduced.

The invention relates to a sludge continuous dewatering system which is characterized by comprising a feeding device, a pre-dewatering device, a deep dewatering device and a sludge discharging device, sludge is conveyed to the feeding device through a pipeline, the sludge is evenly distributed in the two layers of filter cloth through the feeding device, and the two layers of filter cloth wrapped with the sludge are folded and fed into the station cylinder through the feeding device to serve as materials in the station cylinder. the station cylinder is moved to a pre-dewatering device; the pre-dewatering device is used for squeezing and maintaining the pressure of materials in the station cylinder through a low-tonnage hydraulic machine; the station cylinder is moved to the deep dewatering device; the deep dewatering device carries out squeezing and pressure maintaining on the materials in the station cylinder again through the high-tonnage hydraulic machine; the station cylinder is moved to the sludge discharging device; the sludge discharging device is used for separating the sludge and the filter cloth in the station cylinder, the two layers of separated filter cloth are recycled, and the separated sludge is transmitted to a designated position. Through the system, the automation degree of the system is improved, the dewatering performance is improved, and the dewatering cost of different types of sludge can be effectively reduced.

The invention discloses a method for preparing an edible mushroom culture medium from potato residue. The method comprises the following steps: removing rotted potato residue, spreading the potato residue on an iron net and dehydrating, enhancing the ventilation force so that the moisture content of the potato residue is evaporated, and grinding and sieving the air-dried potato residue; evenly mixing 15-20 parts of potato reside, 10-15 parts of saw dust, 4-5 parts of soybean cake powder, 62-66 parts of straw powder and 1-2 parts of gypsum, and adding water until the moisture content is 60-62% and then stirring evenly; bagging and sterilizing, thereby obtaining the edible mushroom culture medium. According to the method, the leftovers of agricultural and forestry products are taken as the major compost needed by cultivating the edible mushrooms, so that the edible mushroom culture cost is reduced; especially, the dosage of the potato residue and other raw materials is optimized so that the biological conversion rate can be increased and the potential value of the potato residue can be developed thoroughly; besides, the environmental pollution caused by the waste potato residue in the potato processing process is solved, the agricultural product processing industry chain is expanded, excellent ecological benefit is generated and considerable economic benefit is generated.

The invention relates to a device for removing heavy metals in sludge by using an electro-dynamic method and synchronously and deeply dehydrating sludge in a process of conveying digested sludge. The device comprises a sludge conveying pipeline, a sludge pump, a direct-current power supply, electrodes and ion exchange membranes/ porous medium membranes, wherein the treatment object of the device is anaerobic digestion sludge; the electric remediation is implemented in the sludge conveying process in the pipeline; a positive electrode and a negative electrode are arranged on the inner wall of the pipeline; a positive chamber and a negative chamber are formed in two sides of the pipeline; the ion exchange membranes/ porous medium membranes are arranged in the positive chamber and the negative chamber; the gap between the electrodes and the ion exchange membranes/ porous medium membranes is filled with an electrolyte solution; the positive electrode and the negative electrode are connected with the power supply by virtue of a lead. By virtue of the device, the heavy metals in the sludge are removed by electrodialysis and electrolysis techniques in the process of conveying the anaerobic digestion sludge via the pipeline; meanwhile, the partial water in the sludge can be removed under the action of the ion exchange membranes/ porous medium membranes; the device can be used for effectively utilizing the conveying power, and is convenient to operate; the subsequent resource utilization of the sludge can be facilitated.

The invention relates to the field of bentonite purification processes, particularly to a process for producing refined montmorillonite by using bentonite. The process comprises: raw ore pulping, sieving, modifying, flocculation dehydration, acid neutralization, flocculation dehydration, washing, pulp adjusting and peeling, concentrating, spray drying, dispersing, and packaging. With the production process of the present invention, impurities, alkali insoluble impurities and acid insoluble impurities can be removed from raw ore, and the new generated impurities after the modification can be removed so as to further improve the product purity.

The invention relates to a compound sludge dewatering conditioner adaptable to a technology for production of building materials from excess sludge as well as a preparation method and an application of the conditioner. The conditioner comprises components in percentage by mass as follows: 20%-60% of SiO2, 5%-20% of Al2O3, 1%-15% of Fe2O3, 5%-15% of CaO, 5%-30% of C and 0.25-2% of N. The preparation method comprises steps as follows: mixing waste concrete, carbide slag, waste fly ash and smelting tailings in proportion to obtain a mixture, mixing the mixture with sludge, spraying a microorganism odor absorber, and performing ventilation and heat preservation for 3-7 days to obtain the conditioner. The conditioner has the dewatering effect and can be used as an important component of raw building materials. When the conditioner is applied to deep sludge dewatering, the method is simple, the dewatering rate can be adjusted according to the comprehensive utilization application of the sludge, the moisture content can be decreased to be lower than 5%, preparation of the building materials such as ceramsite, bricks and the like is facilitated, and the cost for preparation of the building material from the sludge is reduced.

The invention relates to a reverse-direct flotation method for siliceous-calcareous collophanite. According to the method, after raw ore is ground, a flotation process sequentially comprising reverseflotation magnesium removal and direct flotation desilicication operation is adopted, reverse flotation return water enters a reverse flotation water return pool and then returns to reverse flotationmagnesium removal so as to be used, direct flotation return water enters a direct flotation water return pool and then returns to direct flotation desilicication operation, and surplus direct flotation return water is fed into the reverse flotation water return pool so as to be used for reverse flotation. According to the invention, with the method, water can be saved, all wastewater can be recycled, and the treatment cost is low; by using a flotation process sequentially comprising reverse flotation and direct flotation, less water is needed, and reverse flotation return water enters the reverse flotation return water pool and then is reused for reverse flotation; and on the premise that the indexes of the concentrate yield, the grade and the recovery rate are similar to those in the prior art, the dosage of chemicals is small, the ion content of ore pulp in direct flotation operation is low, and water consumption is small.

The invention discloses natural tuber mustard airing dehydration equipment. A base of the equipment is fixed by virtue of the matching of a middle triangular hole and a triangular column at the lower end of a supporting rod, a transverse frame is fixed by virtue of the matching of a triangular hole in the transverse frame and a triangular column at the upper end of the supporting column or the triangular column at the lower end of the supporting column, a transverse support is arranged on the transverse frame, and a transverse connection bearing rod is inserted into a support hole or a support groove of the transverse support. A hanging handle is arranged below a bag hanger, a rain sheltering cover is arranged below the hanging handle, one end of each mesh bag is fixedly arranged on the rain sheltering cover, and at least one rain sheltering brim is fixedly arranged on the periphery of the longitudinal direction of each mesh bag. The natural tuber mustard airing dehydration equipment is simple in structure and has a convenient airing dehydration function; tuber mustard can be subjected to airing dehydration on a large scale without stringing, so that the labor intensity is reduced, the airing dehydration time is shortened, the effects of labor saving and quickness are achieved, and the production efficiency is improved; a tuber mustard airing dehydration frame and the tuber mustard airing dehydration mesh bags can be reused, and therefore the airing dehydration cost is reduced.