14results about How to "Reduce solid waste discharge" patented technology

The invention belongs to the technical field of flue gas treatment, and particularly relates to a flue gas desulfurization and denitrification integrated device and method for a blast furnace hot blast stove. An outlet of a heat exchanger is connected with a booster fan, a cold air mixing valve is connected between the heat exchanger and the booster fan, and an outlet of the booster fan is connected with an inlet flue of a semi-fixed bed adsorption tower; an outlet flue is arranged on the side wall of the semi-fixed bed adsorption tower, the outlet flue and the inlet flue are arranged on different sides of the semi-fixed bed adsorption tower, the reducing agent storage device is connected with the injection structure, the injection structure is inserted into the inlet flue wall of the semi-fixed bed adsorption tower through a pipeline, and the semi-fixed bed adsorption tower is connected with the bed intermittent operation control system. An outlet pipeline at the bottom of the semi-fixed bed adsorption tower is connected with a discharging chain, the discharging chain is connected with a discharging bin, a feeding opening in the top end of the semi-fixed bed adsorption tower is connected with a feeding chain, and the feeding chain is connected with a feeding bin. The device completes desulfurization and denitrification in the semi-fixed bed adsorption tower, no additional device is needed for denitrification, the occupied area is small, and the investment is low; by-products can be comprehensively utilized, and zero waste discharge is realized.

The invention discloses a pebble coal waste heat utilization system and method of a coal-fired unit coupled heat insulation furnace, and belongs to the technical field of energy utilization and energy conservation. Comprising a heat insulation furnace body, a pebble coal crushing unit, an air supply unit, a diesel oil ignition unit, an ash blowing unit, a high-temperature flue gas mixing unit and an ash slag unit, wherein the pebble coal crushing unit, the air supply unit and the diesel oil ignition unit are connected with the feeding end of the heat insulation furnace body; the ash blowing unit and the high-temperature flue gas mixing unit are connected with the flue gas outlet end of the heat insulation furnace body; and the compressed air unit is respectively connected with the heat insulation furnace body, the soot blowing unit and the air supply unit. Based on the stable combustion characteristic of an adiabatic furnace, pebble coal is crushed and then combusted through the adiabatic furnace, after combustion, the pebble coal is mixed with a hot secondary air system of a pulverized coal furnace through hot flue gas, meanwhile, an effective pebble coal treatment mode and hot secondary air temperature rising are provided, solid waste treatment of a unit is achieved, and the flexibility of the unit is improved.

The invention relates to the technical field of ammonia treatment catalysts, in particular to a Ru-loaded nitrogen-containing porous carbon bifunctional catalyst based on toluene diisocyanate waste residues and a preparation method and application of the Ru-loaded nitrogen-containing porous carbon bifunctional catalyst based on toluene diisocyanate waste residues. S2, preparing a modified Ru precursor solution; s3, a carrier with the mass accounting for 0.1-20% of the mass of the modified Ru precursor solution is added into the modified Ru precursor solution, uniform dispersion and reaction are conducted, and turbid liquid is obtained; s4, heating the turbid liquid, and drying for 1-48 hours under the condition of 25-100 DEG C to obtain a solid product; and S5, calcining the solid product in a gas atmosphere to obtain the Ru-loaded nitrogen-containing porous carbon bifunctional catalyst based on the toluene diisocyanate waste residues. According to the preparation method, industrial waste residues are adopted as raw materials, solid waste emission is reduced, meanwhile, the preparation cost of the catalyst is remarkably reduced, and important economic and social benefits are achieved; the method is simple and easy to operate, low in energy consumption in the preparation process and suitable for large-scale production.

The invention belongs to the technical field of solid waste resource utilization, and particularly relates to an adsorbed waste kaolin-based rubber filler as well as a preparation method and application thereof. The method comprises the following steps: firstly, carrying out solid-liquid separation on heavy metal ion wastewater adsorbed by kaolin to obtain solid waste residue, namely waste kaolin, mixing the waste kaolin with a precipitator, co-grinding, and drying to obtain precipitated kaolin; calcining the precipitated kaolin at high temperature to obtain calcined kaolin; and finally, co-grinding the calcined kaolin and the modifier, wherein the grinding product is the waste kaolin-based rubber filler. The prepared waste kaolin-based rubber filler can be filled into a rubber base material to improve the mechanical properties of a rubber composite material. According to the invention, the waste kaolin adsorbed with heavy metal ions is effectively utilized, solid waste discharge is reduced, the rubber filler with high added value is provided, and a new idea is provided for development and application of the rubber filler.

The utility model relates to the technical field of sodium sulfate solid waste treatment in vitamin C production, in particular to a sodium sulfate solid waste treatment device. The sodium sulfate solid waste treatment device comprises a dissolving kettle, the dissolving kettle is connected with a reaction kettle through a backwashing filter, the reaction kettle is connected with a drying box through a filter, the drying box is connected with a sifter through a pipeline, and the filter is connected with a deamination and denitrification tower through a pipeline. According to the method, solid waste emission is reduced, the environment is improved, and by-products obtained after solid waste treatment are raw materials needed in company production and are reused for production, so that raw material purchase is reduced, the cost is reduced, and good economic benefits, social benefits and environmental protection benefits are achieved.

The invention provides a preparation method of white tea enzyme liquid, and belongs to the technical field of food biology.The method comprises the following steps of raw material pretreatment, preparation of dry white tea and purified water, preparation of Chinese patent medicine compound distiller's yeast, liquid fermentation of the compound distiller's yeast, distillation and separation of tea liquor, and refining and sterilization of the white tea enzyme liquid. According to the invention, 24 Chinese patent medicines with homology of medicine and food are blended into the distiller's yeast for preparation, so that the enzyme liquid has the composite health-care functions of oxidation resistance (tea polyphenol), bioflavonoids and the like of white tea at the same time, and the core pain point of single effect of the existing product is solved.

This utility model relates to a catalyst recovery device for dimethyl carbonate (DMC) preparation, belonging to the field of DMC preparation technology. It includes a recovery chamber with a mounting ring fixedly connected to its bottom surface. A clearance groove is formed on the back of the mounting ring. Inside the recovery chamber is a recovery assembly for catalyst recovery. The recovery assembly includes a partition plate fixedly connected inside the recovery chamber. A connecting chamber is placed on top of the partition plate. The inner top wall of the connecting chamber is rotatably connected via a bearing to an inlet pipe that extends through the connecting chamber and to the top of the recovery chamber. This catalyst recovery device for DMC preparation facilitates catalyst separation through a ceramic membrane. The rotation of the connecting chamber improves the separation effect. The separated catalyst is conveniently heated through a heating pipe and a connecting rod, resulting in high recovery efficiency, reduced production costs, and reduced solid waste emissions.

The invention relates to a photovoltaic cell BSG and PSG production section hydrofluoric acid waste liquid recycling device and a use method, and the device comprises a hydrofluoric acid collection device, a chemical reaction device, a precipitation separation filtering device, a rectification purification device, a hydrofluoric acid recovery storage tank, a pure water recovery storage tank, pipelines connected between the hydrofluoric acid recovery storage tank and the pure water recovery storage tank, and the like. The hydrofluoric acid collecting device is respectively connected with the PSG industrial pickling tank and the BSG industrial pickling tank, the chemical reaction device and the settling separation filtering device are sequentially connected behind the hydrofluoric acid collecting device, and separated liquid enters the rectification purification device to be rectified and purified. The rectified and purified substances respectively enter a hydrofluoric acid recovery storage tank and a pure water recovery storage tank, and the hydrofluoric acid recovery storage tank is respectively connected with the PSG industrial pickling bath and the BSG industrial pickling bath for recycling. The device has the advantages of simple and reasonable structure, economy, environmental protection, stable operation and the like.

The present invention relates to a die-casting mold and production process of a bimetallic composite hammer head for a hammer crusher, belonging to the field of metal die-casting technology, wherein a replaceable core is installed inside the mold sleeve, a core is installed inside the mold core, and the core and the mold core are combined to form a casting mold cavity, firstly, a mold release agent is sprayed on the surface of the mold core and preheated, the mold core after preheating and expansion is loaded into the mold sleeve, 35# steel melt and high chromium cast iron melt are poured into the mold cavity, the filling speed is controlled until the excess high chromium cast iron melt flows out of the overflow tank, the casting is stopped, and then the hydraulic press is quickly operated to control the upper mold mechanism to press down, and the pressure is maintained for a period of time when the pressure reaches the lowest point, the hydraulic press is operated to lift the upper mold mechanism, the ejector rod ejects the core, and the hammer head after the liquid forging operation is completed is taken out, and the hammer head is placed in a resistance furnace for heat treatment. The internal grain structure of the bimetallic composite hammer head prepared by the present invention is more refined, the carbide distribution is more uniform, the bimetallic interface bonding strength is higher, and the service life is greatly increased.

The invention provides a foundation pit integrated supporting system based on an in-situ curing process. The foundation pit integrated supporting system comprises an active area curing supporting body arranged outside a foundation pit design excavation contour line and a passive area curing soil body located on the inner side of an active area. The active area solidified support body and the passive area solidified soil body are synchronously formed through an in-situ solidification process to form an integrated support structure; the active area solidified support body comprises an active area solidified soil body and a vertical reinforcing body; at least a through hole is formed in the surface, in contact with the passive area solidified soil body, of the recoverable reinforcing body, and the passive area solidified soil body enters the through hole when being extruded and is in cross strong key connection with the active area solidified soil body; and by utilizing the characteristic of high in-situ curing strength improvement speed, the construction period is shortened by more than 40%, and the method is particularly suitable for foundation pit engineering with short construction period.

The invention relates to a die-casting die and a production process of a bimetal composite hammerhead for a hammer crusher, and belongs to the technical field of metal die-casting. A replaceable die core is mounted in a die sleeve, a mold core is mounted in the die core, and the mold core and the die core are combined to form a pouring die cavity; the preheated and expanded mold core is arranged in the mold sleeve, 35 # steel molten liquid and high-chromium cast iron molten liquid are poured into the mold cavity, the mold filling speed is controlled till the redundant high-chromium cast iron molten liquid flows out of the overflow groove, casting is stopped, then a hydraulic machine is rapidly operated to control the upper mold mechanism to press downwards, and pressure maintaining is continuously conducted for a period of time when the lowest point of pressing is straightened; the hydraulic machine is operated to lift the upper die mechanism, the ejector rod ejects the die core out, the hammer head obtained after liquid forging operation is completed is taken out, and the hammer head is placed in a resistance furnace to be subjected to heat treatment. The internal grain structure of the prepared double-metal composite hammer head is more refined, carbide distribution is more uniform, the double-metal interface bonding strength is higher, and the service life is greatly prolonged.

The present application belongs to the technical field of artificial stone, and particularly relates to an environment-friendly zero-silica stone based on bio-based resin and a preparation method thereof.The environment-friendly zero-silica stone according to the present application contains, by weight percentage, 63-70% of zero-silica stone recycling material, 20-25% of amorphous silicon dioxide powder, and 8-12% of resin, wherein the resin is composed of unsaturated polyester resin and bio-based resin, and the amount of the bio-based resin is 10-30% of the total weight of the resin.The environment-friendly zero-silica stone uses zero-silica stone recycling material and amorphous silicon dioxide powder as main aggregate fillers, and uses unsaturated polyester resin and bio-based resin as a combined adhesive matrix, so that the curing performance, mechanical strength and economy are considered, and the obtained product has high compactness, stable physicochemical properties, and is green and environment-friendly.

The invention discloses a modified epoxy curing agent based on KH-560 distillation residues as well as a preparation method and application of the modified epoxy curing agent. The preparation method comprises the following steps: A, putting a polyamine compound into a stirring kettle, and stirring; b, putting an accelerant into a stirring kettle, stirring the accelerant and the polyamine compound to obtain a mixed solution, uniformly mixing, introducing nitrogen into the stirring kettle, and replacing air in the kettle; c, the KH-560 distillation residues are put into a storage tank, nitrogen is introduced into the storage tank, and air in the storage tank is replaced; d, heating the mixed solution in the stirring kettle to a reaction temperature, and metering and dropwise adding the KH-560 distillation residue into the stirring kettle according to a theoretical equivalent to react; e, after dropwise adding is completed, liquid in the stirring kettle is subjected to heat preservation and continuous stirring at the reaction temperature, and the modified epoxy curing agent is obtained after discharging. According to the scheme, the KH-560 distillation residue can be safely and efficiently converted into the modified epoxy curing agent, the epoxy value in the KH-560 distillation residue is recycled, and meanwhile, the environment-friendly treatment cost is reduced.

The application provides a method for synthesizing dextroketoprofen. The method comprises the following steps: S1: taking ketoprofen amide as a raw material, performing a hydrolysis reaction in a reaction medium, a cosolvent, a phase transfer catalyst and an amidase system, and performing separation and purification to obtain dextroketoprofen and levo-ketoprofen amide; S2: performing a chemical racemization reaction on the levo-ketoprofen amide in the presence of a solvent and a base to obtain ketoprofen amide; and repeating step S1 by taking the ketoprofen amide as a raw material. The method has high substrate concentration, low enzyme substrate ratio, high selectivity, high conversion rate and high product purity, higher efficiency, low solvent consumption, lower cost, fully utilized raw materials, less solid waste discharge, can meet the requirements of industrialized production of enzyme catalysis, and has good industrial application potential.