33results about How to "Save investment in environmental protection" patented technology

The invention mainly discloses an aeration type sewage treatment device and method. The technical scheme is as follows: the device comprises a primary sedimentation tank, a biodegradation tank and a disinfection tank, wherein a filtering device is arranged in the primary sedimentation tank and comprises a filtering plate and a collection box; the biodegradation tank comprises a facultative tank, an aerobic tank and a clarifying tank in mutual connection; a biological packing frame is arranged in the facultative tank; an aeration device is arranged in the aerobic tank and comprises a lifting cylinder, a spiral aerator and a rotating disk; the spiral aerator is mounted on the upper side of the lifting cylinder; a rotating shaft of the spiral aerator penetrates the rotating disk; and aerobic microbial packing is arranged on the rotating disk. Particle impurities of sewage are removed by the primary sedimentation tank, and then the sewage enters the biodegradation tank for reacting and finally is subjected to disinfection treatment. In the invention, through multi-stage treatment of the sewage, harmful substances in the sewage are separated and degraded better, the blocking phenomenon does not happen frequently, the treatment efficiency is high while the effect is good, and the treated sewage reaches the national discharge standard.

The invention discloses a solid waste incineration system with an exhaust gas secondary combustion drying ignition device and a treatment method thereof. The solid waste incineration system comprises an incineration device and an air extraction system, wherein the incineration device comprises a cloth section, a drying section, an ignition section and an incineration section; operation at the drying section and the ignition section is achieved through the exhaust gas secondary combustion drying ignition device; the exhaust gas secondary combustion drying ignition device is in a cover body form, covers sintering materials, and is divided into an exhaust gas secondary combustion drying part at the front section and an ignition part arranged at the tail end; the incineration exhaust gas returns to the ignition device and burns in the situation that gas fuel is externally added, and a secondary combustion chamber is formed; and combustible matters in the flue gas are completely combusted, and harmful substances such as CO, NOx and dioxin in the flue gas are decomposed and are effectively treated. According to the solid waste incineration system, a high temperature gas generated during combustion ignites the materials, and waste heat of the exhaust gas dries and preheats the materials before ignition.

The invention discloses a treatment method for a mother liquid generated in the preparation process of aspartic acid, and belongs to the field of green chemical synthesis. The treatment method uses the mother liquid to prepare a polyaspartic acid product. The method provided by the invention has no waste discharge, is safe environmentally friendly and pollution-free, and meets the requirements ofclean production; and the method has a simple production process, needs less equipment, has a high resource utilization rate, and is suitable for large-scale production.

The invention relates to the technical field of energy-saving comprehensive utilization of mineral resources, in particular to a device and method for optimizing iron ore through gas-based direct reduction magnetic separation. The device comprises a kiln body, wherein a roundabout snake-shaped flue is arranged in the kiln body from top to bottom, and the snake-shaped flue is divided into a preheating section, a heating section and a reduction section from top to bottom; a preheating material pool is arranged above the preheating section, the bottom of the preheating section is communicated with a blanking channel, and the blanking channel penetrates through the heating section and the reduction section and is isolated from the heating section and the reduction section; the bottom end of the blanking channel is communicated with an air cooling pipeline, and a reducing gas preheating reduction device is arranged in the air cooling pipeline; the bottom of the air cooling pipeline is connected with a circulating grinding system and a magnetic separation optimizing system. According to the method, a final optimized product is obtained through raw material treatment, gas-based direct reduction roasting and grinding magnetic separation optimization; and the problems of low reduction efficiency, long reduction heating time, a high heating temperature and poor heat preservation effect in the prior art are solved.

The invention relates to the technical field of energy-saving comprehensive utilization of mineral resources, in particular to a method and device for optimizing iron ore through coal-based coking reduction roasting coke magnetic separation. The device comprises a raw material treatment flue gas waste heat utilization system, a coal-based coking reduction roasting system, a coke separation system, a circulating grinding system, a magnetic separation optimization system and an ash and dust removal system. An optimized iron fine powder product is finally obtained through the steps of raw material treatment, coal-based coking reduction roasting, iron ore reduction catalysis coking coal coking, coke separation, circulating grinding and magnetic separation optimization. The method is suitable for treating various types of iron oxide ores with TFe greater than 38%, coking reduction roasting coke volatile matter less than 1.2% meets the ironmaking and steelmaking requirements, the iron recovery rate is obviously improved, the grade of optimized fine iron powder can reach more than 76% of TFe, the sulfur and phosphorus removal efficiency is greater than 60%, energy is saved by greater than 50%, and the problems of high energy consumption, low reduction efficiency, difficulty in thermotechnical control, unstable product quality and shortage of reduced iron raw materials in the existing process are solved.

The invention relates to the technical field of energy-saving comprehensive utilization of mineral resources, in particular to a method for optimizing low-grade laterite-nickel ore through gas-coal double-base direct reduction magnetic separation. The method comprises the following specific steps of raw material treatment, carrying out reduction roasting on a material and reduction coal mixture by using a gas-coal double-base direct reduction roasting kiln; cooling a laterite-nickel ore particle material subjected to reduction roasting and sequentially passes through a coal separation recycling system, a double-roller grinding system, a Raymond grinding system and a magnetic separation system to obtain a nickel alloy product, and the mass percent of nickel contained in the nickel alloy product is that Ni is greater than 8%. According to the method, the problems of low reduction efficiency, long reduction heating time, high heating temperature and poor heat preservation effect in the prior art are solved.

The invention discloses an air heater and air purifier. The heat storage type heat exchange principle is applied, a left fan and a right fan are used for reversing, and therefore the air inlet and outlet flow directions are changed, a reversing valve is replaced, and heat storage type heat exchange is achieved in a simple and low-cost manner. Air is heated and purified in the heating process, the temperature of the heating and disinfecting process is 150-900 DEG C according to needs, the exhaust temperature is increased by 5-50 DEG C, energy consumption is low, the air heater and air purifier can be applied to public places such as stations, hospital halls, classrooms, churches, offices, hotel halls and restaurants and workshops such as paint spraying rooms, paint baking rooms and VOC-polluted newly-decorated rooms where VOC is generated, and indoor waste gas containing bacteria, viruses and VOC is disinfected and incinerated while heating is conducted. If the calorific value of VOC waste gas is high, self-stable combustion can be realized without power consumption after the air heater and air purifier is started, and heat generated by waste gas is effectively utilized while pollutants are treated.

The invention relates to the technical field of energy-saving comprehensive utilization of mineral resources, and particularly relates to a device and method for optimizing low-grade laterite-nickel ore through gas-based direct reduction magnetic separation. The device comprises a kiln body; a roundabout snake-shaped flue is arranged in the kiln body from top to bottom; the snake-shaped flue is divided into a roasting preheating section, a roasting heating section and a roasting reduction section from top to bottom; a preheating material pool is arranged above the roasting preheating section; the bottom of the roasting preheating section is communicated with a vertical blanking passage; the blanking passage penetrates through the roasting heating section and the roasting reduction section and is isolated from the roasting heating section and the roasting reduction section; the bottom end of the blanking passage is communicated with an air cooling pipe; and the bottom of the air cooling pipe is connected with a material output device and a grinding magnetic separation system. According to the method disclosed by the invention, a final optimized product is obtained through raw material treatment, gas-based direct reduction roasting and grinding magnetic separation optimization; and the invention solves the problems of low reduction efficiency, long reduction heating time, high heating temperature and poor heat preservation effect in the prior art.

The invention discloses a heat-insulation wallboard with a low heat transfer coefficient, containing the following materials in parts by weight: 80-120 parts of cement, 30-50 parts of prefabricated expanded perlite, 40-60 parts of styrene-acrylic emulsion, 20-40 parts of poly-acrylonitrile base carbon fiber, 30-40 parts of glass fiber, 8-16 parts of gypsum, 15-20 parts of ultra-high molecular weight polyethylene fiber, 5-10 parts of steel fiber, 2-8 parts of kieselguhr, 15-25 parts of esterified starch, 10-20 parts of coal ash, 8-16 parts of talcum powder, 10-20 parts of calcium carbonate, and5-10 parts of mica powder. The prefabricated expanded perlite is prepared by adopting the following process: uniformly mixing gelatin, expanded perlite and hydrogen peroxide solution, filtering, adjusting the system to be neutral, adding ammonium persulfate and sodium hydrogen sulfite under nitrogen protection and stirring, adding acrylamide and stirring, precipitating, and drying, thus obtainingthe prefabricated expanded perlite.

The invention discloses a method for preparing a high-strength heat-preservation wallboard. The method comprises the following steps that xanthan gum, expanded perlite and a hydrogen peroxide aqueoussolution are uniformly mixed and filtered, a system is adjusted to be neutral, ammonium persulfate and sodium bisulfite are added and stirred under the protection of nitrogen, acrylamide is added andstirred, and precipitating and drying are conducted to obtain a prefabricated material; cement, the prefabricated material, a polyurethane emulsion, nylon fibers, coal gangue and glutinous rice flourare stirred, pressed, shaken and then pressed, and then steam maintenance and natural airing are conducted to obtain the high-strength heat-preservation wallboard, wherein the weight ratio of the cement, the prefabricated material, the polyurethane emulsion, the nylon fibers, the coal gangue and the glutinous rice flour is (50-100):(20-40):(20-40):(10-20):(15-23):(2-10). The obtained heat-preservation wallboard has high compressive strength and flexural strength, low heat transfer coefficient and excellent heat preservation performance.

The invention discloses a near-zero-release membrane process sewage treatment system for sludge. The system comprises a facultative biochemical system, an MBR membrane assembly system and an equipment room, wherein the MBR membrane assembly system is arranged on one side of the facultative biochemical system, and the equipment room is formed between the facultative biochemical system and the MBR membrane assembly system; and the facultative biochemical system comprises a facultative biochemical tank. The near-zero-release membrane process sewage treatment system is provided with the facultative biochemical system and the MBR membrane assembly system, wastewater with a relatively high COD concentration is firstly subjected to facultative biochemical treatment by a facultative strain, the treated wastewater together with the facultative strain flows into a membrane tank through a sewage connecting pipe, and the facultative strain is attached to an MBR membrane assembly in the membrane tank so as to purify the sewage, so that the volume of the biochemical tank is reduced, the environmental protection investment is saved, the daily operation cost is lowered, the sludge is substantially reduced, and the sludge output is low.

The invention relates to the technical field of energy-saving comprehensive utilization of mineral resources, and particularly relates to a method and device for optimizing an iron ore through gas-coal double-base direct reduction magnetic separation. The method specifically comprises the steps: carrying out raw material treatment; carrying out reduction roasting on a material and reduction coal mixture by using a gas-coal double-base direct reduction roasting kiln; cooling an iron ore particle material subjected to reduction roasting; and sequentially treating by a coal separation recycling system, a double-roller grinding system, a Raymond grinding system and a magnetic separation optimization system to obtain optimized fine iron powder, wherein the grade Fe of the optimized fine iron powder is greater than 78%. The invention solves the problems of low reduction efficiency, long reduction heating time, high heating temperature and poor heat preservation effect in the prior art.