53results about How to "Reduce dehydration energy consumption" patented technology

The invention discloses a method for dehydrating polyol aqueous solution produced from corn, which belongs to the application technology of vacuum membrane distillation. The method adopts a membrane distillation device, first heats the polyol aqueous solution to a temperature of 61°C-65°C, and then uses a raw material pump to add the polyol aqueous solution into the hollow fiber membrane to form a vacuum environment of 0.085MPa-0.089MPa outside the membrane, thereby A vapor pressure difference is formed on both sides of the membrane. The water in the polyol aqueous solution inside the membrane enters the hollow fiber membrane through the membrane holes in the form of steam under the action of the vapor pressure difference, and then condenses into Water, collecting condensed water, so as to achieve dehydration and concentration of polyol aqueous solution produced from corn. The invention has the advantages of operating temperature below 65 DEG C, lower energy consumption compared with the existing common distillation method, high interception rate of polyalcohol by the membrane used, and low loss rate of polyalcohol.

The invention relates to a continuous sludge dewatering method based on hydro-thermal treatment, and belongs to the field of sludge treatment. An external heat exchanger of a feeding unit is filled with high temperature filtrate, sludge is continuously introduced in the feeding unit, and the high temperature filtrate is used for preheating the sludge; the sludge after preheating enters a hydro-thermal treatment unit under the pushing of the feeding unit, and is heated to above 150 DEG C for a hydro-thermal reaction through a heating device arranged on the outside of the hydro-thermal treatment unit; the standing time of the sludge inside the hydro-thermal treatment unit is controlled by an accelerator arranged at the interior of the hydro-thermal treatment unit; partial sludge after hydro-thermal treatment is flown back to the hydro-thermal treatment unit; the sludge passing through the hydro-thermal treatment unit is introduced in a continuous extrusion dewatering unit to realize continuous dewatering of the hydro-thermal sludge, and a cavity in the dewatering process is at a sealed state. According to the dewatering method, based on the hydro-thermal treatment for improving the sludge structure and physicochemical characteristics, the energy sources are fully utilized and recycled while the energy consumption input is saved, and the sludge dewatering in a liquid form is realized continuously.

The invention relates to a sludge substance deep dehydrating method based on thermal conditioning coupling filter pressing, belongs to the field of sludge treatment, is suitable for dehydration of various kinds of sludge, and particularly suitable for dehydration of surplus sludge. The method comprises the following steps: firstly carrying out heat exchange to a high temperature filtrate and the sludge, injecting the sludge with the raised temperature in a thermal conditioning processing unit, and performing a sufficient hydrothermal reaction at 120-250 DEG C; then immediately performing filter processing and dehydrating under the pressure to remove the moisture in a liquid state; at last, decompressing the high temperature sludge filter cake with pressure, further steaming and dehydrating with the sludge own high temperature and heat, so as to improve the dehydrating efficiency. The dehydrating method can improve sludge structure, physicochemical property and moisture distribution, save and fully utilize the heat, realize high-dryness and low-energy consumption dehydration of sludge, and improve the recycling value of the sludge.

The invention relates to a method for producing isopropanolamine by a liquid ammonia process, mainly solving the problems such as high device investment, high energy consumption in dehydration and many by-products due to the fact that water is used as a catalyst in the prior art. The method has the advantages that anhydrous liquid ammonia and propylene oxide are used as raw materials for reaction,a tubular fixed bed reactor and an adiabatic fixed bed reactor are provided to ensure complete conversion of the propylene oxide, and the tubular fixed bed reactor removes heat of the hot water preheated reaction raw materials and reaction products under reduced pressure through heat removal of circulating hot water, so that most of reaction heat can be recycled; most of ammonia of the reaction products is recycled through a flash tank, and residual ammonia is recycled by an ammonia stripping tower with an compressor at the top; few by-products are generated, equipment investment and device energy consumption can be reduced, and the method can be applied to industrial production of the isopropanolamine.

The invention belongs to the technical field of rubber after-processing auxiliary equipment, and particularly relates to an emulsion mixture dual-screw water removal device. A main structure comprises a base, universal wheels, a foot brake piece, a motor, a reducer casing, a coupler, a dual-screw assembly, a core shaft, a machine barrel, a feeding opening, a rotary air leakage roller, a scraping knife, a draining hole, a filter net, a steam hole, a first steam supply pipe, a second steam supply pipe, a support, a discharging hole and an exhaust hole; an emulsion mixture is subject to extrusion water removal to the maximum degree, water in the emulsion mixture is removed to the maximum degree, water can be effectively extruded, the losing of the emulsion mixture performance caused by continuous and excessive extrusion of the emulsion mixture can be avoided, different draw ratios are arranged according to the different water removal requirements, extrusion water removal of the emulsion mixture to the maximum degree can be achieved, the water removal rate of the emulsion mixture can be improved, the product yield is improved, and the device is simple in structure, energy-saving, environment-friendly, friendly in use environment and easy to use and popularize.

The invention discloses a method for pretreating and strengthening sludge dehydration by using acetylene sludge. The method comprises adding a modifier and extruded sludge into sludge, wherein acetylene sludge is added before the modifier is added. The method comprises the following steps of: a, doping sludge of which the water content is higher than 70 percent into acetylene sludge, and stirringand mixing uniformly to obtain mixed sludge, wherein the doping amount of the acetylene sludge is 1-50 percent by volume based on the total amount of the sludge; b, continually adding a modifier in an amount which is 0.5-2 percent by volume based on the total amount of the sludge, and stirring to obtain sludge into which the modifier is added; and c, feeding the sludge into which the modifier is added into a plate-and-frame type filter press for extruding to obtain a dehydrated mud cake. In the method, the acetylene sludge is used together with a general modifier, so that the dehydration rateof mechanical filter pressing is increased, the amount and volume of sludge are reduced, and the dehydration energy consumption is lowered greatly simultaneously. In the method, useful components in acetylene sludge are fully utilized, the aims of changing waste into valuable and protecting the environment are fulfilled, and positive technical progress and remarkable economic effect are achieved.

The invention relates to a method for dewatering washing tailing slime of bauxite ore. The method includes the steps that firstly, tailing slime of the bauxite ore is fed into a storage tank through afluid director, flocculant is added, preliminary flocculation is carried out, and slurry is obtained; and then the slurry is fed into a pipe mixer, modified flocculant is added, further flocculationis carried out, thorough stirring is carried out, three-stage dewatering is carried out by adopting a belted filter, and a filter cake and filtrate with the moisture content not higher than 35wt% areobtained. According to the method for dewatering the washing tailing slime of the bauxite ore, the modified flocculant is utilized ingeniously, thus compact fine tailing slime particles are convertedinto loose flocculation, and filtration and dewatering of the tailing slime are facilitated; the moisture content of the generated filter cake is no more than 35wt%, the filter cake has no fluidity, and can be used for backfilling goaf, tailing wet storage of the tailing slime is changed into dry disposal, safety and the environmental protection effect are obvious, energy consumption of filtrationand dewatering is low, and water resources are saved.

The invention discloses a rapid sewage sludge drying process based on a microwave-polar medium material. According to the method, mixed slurry prepared from a mixed solvent and the polar medium material are added to sludge-containing sewage in a flocculation stirring tank in the process of sludge flocculation and sedimentation, wherein the mixed solvent is prepared from organic polymer flocculantPAM (polyacrylamide) and inorganic polymer coagulant PAC (polyaluminium chloride), so that activated carbon powder and the manganese dioxide polar medium material are fully and uniformly mixed with sludge in the process of sludge flocculation and finally uniformly distributed in the precipitated aqueous sludge, and then the precipitated flocculated water-containing sludge uniformly mixed with thepolar medium material is filtered by a belt filter press, and sludge cakes are formed and transported into microwave drying equipment by a conveyor belt for rapid drying. Utilization efficiency of microwave energy is increased by adding the medium material to the sludge, the heating rate is increased, the purpose of rapidly drying the sludge is achieved, emission of pollutants in the sewage is reduced, sludge dehydration energy consumption is reduced by 40%-50%, and dehydration efficiency is increased by 50% or higher.

The invention provides a high-elastic diaphragm filter plate and a preparation method thereof. The diaphragm filter plate comprises a core plate, a diaphragm, a feed hole, a sealed squeezing medium cavity, and a squeezing medium hole formed in the core plate and communicated with the squeezing medium cavity. The diaphragm comprises a hard ring made of hard plastic, a diaphragm main part made of high elastic materials, and a diaphragm frame part made of hard plastic. The squeezing medium cavity is located between the diaphragm main part and the core plate, the outer surface, in the backward direction of the core plate, of the diaphragm frame part is a diaphragm sealing surface, and a filter chamber is formed in the side of the outer surface of the diaphragm main part. The compressive deformation resistance of the hard plastic is high and thus can ensure the sealing performance of the sealing surface of the diaphragm, and the service life of a diaphragm filter plate is greatly prolonged;while the high elastic material has strong deformation ability, the diaphragm main part thus has a larger pressing stroke, the high squeezing rate of the diaphragm filter plate is thus ensured, a filter cake with low water content can be obtained, and ultimately energy consumption for dewatering is greatly reduced.

The invention discloses a calcium-zinc composite stabilizer production system and a production process thereof, belonging to the technical field of heat stabilizer production. The calcium-zinc composite stabilizer production system of the present invention comprises a stirring device, a drying device and a pulverizing device which are sequentially arranged and connected according to the technological process; wherein: the stirring device includes a reaction kettle, a stirring rod, a discharge pipe and a water pump, and the The stirring rod is directly inserted into the middle and lower part of the reactor, the discharge pipe communicates with the bottom of the reactor, and the water pump communicates with the upper part of the reactor through a water pipe; the drying device is a vacuum freeze-drying device. Compared with the stabilizers of the prior art, the calcium-zinc composite stabilizer prepared by the production process of the present invention adopts three groups of components in a ratio of 1:1 for the first time, and achieves cold resistance, heat resistance and smoothness when applied to high-grade plastics. , toughness, wear resistance and other unexpected technical effects, and the service life has been proved by destructive tests, at least increasing the original service life by more than 20%.

The invention relates to a synthetic method of a paper retention and filter aid. The method adopts the scheme that the nonionic monomer, the cationic monomer and the deionized water are mixed according to the proportion (300-500:35-75:320-510) of weight ratio after nitrogen charging and oxygen removal at the temperature of 10-30 DEG C and under the stirring condition; and a water-soluble initiator with weight ratio of 0.12-0.83 is added with water for dissolution and then is added in the mixed liquor; and the polyreaction is carried out for 3-8 hours at the temperature of 0-90 DEG C. The invention is the copolymer of the acrylamide and the cationic monomer, the copolymer and the particles in the pulp are flocculated after electrical neutralization or bridging to be retained on the filter cloth, and the invention can improve the retention rate of the fiber fines and the filler particles on the net, promote the dehydration of the paper and reduce the loss volume of the fiber in the white water; and the invention not only can improve the surface properties of the paper, but also can enhance the tensile property of the paper.

The invention belongs to the technical field of gunpowder processing auxiliary equipment, and relates to a dual-screw non-closed water removal device used for gunpowder continuous processing. A main structure comprises a base, universal wheels, a foot brake piece, a motor, a reducer casing, a coupler, a dual-screw assembly, a core shaft, a machine barrel, a gunpowder inlet, a rotary air leakage roller, a scraping knife, a draining hole, a filter net, a hot water hole, a first hot water supply pipe, a second hot water supply pipe, a gunpowder outlet and an exhaust hole; water-containing gunpowder is subject to extrusion water removal to the maximum degree, water in the water-containing gunpowder is removed to the maximum degree, water can be effectively extruded, the damage or the dangerous condition of the gunpowder performance caused by continuous and excessive extrusion of the water-containing gunpowder can be avoided, the dual-screw assembly can be arranged to have different draw ratios according to the different water removal requirements, extrusion water removal of the water-containing gunpowder to the maximum degree can be achieved, the water removal rate of the water-containing gunpowder can be improved, the structure is simple, and the device is energy-saving, environment-friendly, friendly in use environment and easy to use and popularize.

The invention discloses an oily sludge reduction comprehensive experiment device and belongs to the technical field of oily sludge treatment and aims to solve the problems of inconvenient pressure adjustment, single electroosmosis electric field arrangement mode, inconvenience in setting ultrasonic composite action frequency, uneven sound wave, action and failure to quantitatively investigate adsorption-assisted dehydration in the prior art. An air cylinder of a pneumatic device is fixed at the top of a bracket; a piston rod of the air cylinder of the pneumatic device is vertically arranged downwards and connected with the top of a piston cylinder outer cover of an integrated piston; a cathode dehydration material layer is arranged at the lower end of the integrated piston and fixedly connected with the bracket; the lower end of the cathode dehydration material layer is connected with the upper end of a water collection and vacuum suction filtration device in a sealed mode; and experiment platforms are fixed to the left side and the right side of the bracket respectively. In a whole experiment process, different electric fields, pressures, ultrasonic waves and vacuum suction filtration modes are adopted to perform comprehensive dehydration on oily sludge, so that optimal process conditions are further explored, energy consumption is reduced, and a dehydration effect and efficiency are improved.