1032results about How to "Achieve emissions" patented technology

The invention relates to a coal-fired power plant coal dust prepared activated coke flue gas comprehensive purification system and a technology. The technology provided by the invention comprises the following steps of: using coal dust in a coal-fired power plant as a raw material, simultaneously carrying out carbonization and activation on coal dust in an activated coke preparation reactor to obtain powdered activated coke, using pyrolysis gas obtained during the preparation process as reburning fuel and sending it into a boiler so as to remove part of NOx; sending the powdered activated coke into a flue gas adsorption tower, adsorbing pollutants such as sulfur dioxide, mercury and the like at an appropriate temperature, injecting ammonia gas and nitrogen oxide to perform a catalytic reduction reaction so as to remove nitrogen oxide; reusing the adsorbed activated coke after regeneration; sending the activated coke into the boiler for combustion after multiple adsorption/regeneration; regenerating the activated coke after adsorbing sulfur dioxide to obtain high-density sulfur dioxide gas to realize resource utilization. By the utilization of coal resources in a coal-fired power plant, the comprehensive purification of flue gas and the resource utilization of sulfur dioxide are realized without discharge of waste water, exhaust gas and solid waste.

The invention discloses a membrane-laminated fiberglass filter medium capable of denitration and dust removal. The membrane-laminated fiberglass filter medium capable of denitration and dust removal comprises a fiberglass filter base material, a NOX catalyst removing dip coating layer and an expanding micropore polytetrafluoroethylene filtering film; the membrane-laminated fiberglass filter medium capable of denitration and dust removal is characterized in that firstly, soakage drying post treatment is carried out on the fiberglass filter base material by using a NOX catalyst removing batch mixture, the NOX catalyst removing dip coating layer is formed on the surface of fiberglass, high-temperature hot pressing is carried out on the NOX catalyst removing dip coating layer and a polytetrafluoroethylene surface film, and the functional membrane-laminated filter medium which has a NOX catalyst removing function and can prevent the PM2.5 is prepared. The membrane-laminated fiberglass filter medium capable of denitration and dust removal provided by the invention can not only avoid the detrimental effect on a catalyst caused by flying ash particles, but also effectively reduce tiny dust such as PM2.5, and the discharge of the smoke dust which is below 5mg/Nm<3> is realized; the combination of catalyst powder and the filter medium are firm, the inherent properties of the filter medium are not affected, and the filter medium is particularly suitable for industrialized production.

The invention provides a method for extracting aluminum oxide from coal gangue and co-producing active calcium silicate, and relates to the technical field of producing aluminum oxide and the active calcium silicate. The method comprises the following steps of: grinding coal gangue, and roasting and activating the ground coal gangue; performing alkali soluble desilication of coal gangue clinker to obtain desilication coal gangue and solution of sodium silicate; performing causticizing reaction of the solution of sodium silicate to obtain water-containing calcium silicate and solution of sodium hydroxide, and drying the water-containing calcium silicate to obtain micro powder of active calcium silicate; adding limestone and solution of sodium carbonate into the desilication coal gangue, and ball-grinding the mixed solution to obtain raw slurry; dissolving out the clinker which is obtained by roasting the raw slurry with water to obtain crude solution of sodium aluminate and silicon and calcium residues, wherein the silicon and calcium residues can be used as cement raw materials after post-treatment; performing deep desilication of the crude solution of sodium aluminate to obtain the purified solution of sodium aluminate; feeding CO2 into the purified solution of sodium aluminate to obtain aluminum hydroxide and solution of sodium carbonate; and calcining the aluminum hydroxide to obtain the aluminum oxide products. The method has the advantages of simple process, low production cost, low energy consumption and little consumption of raw materials; in addition, by the method, two kinds of silicon-containing byproducts are simultaneously produced, and no waste is generated.

The invention relates to equipment for modular treatment of oil field wastewater. The equipment comprises a wastewater pretreatment unit, a micro interface control unit for performing coagulation, decoloration and oil removing on a micro interface, a sedimentation unit for removing relatively large particle impurities, a sand filter processing unit for retaining fine flocs, an ozone catalytic oxidation unit for removing poisonous and harmful substances, an adsorption processing unit for removing dissolvable organic matters and micro heavy metal ions, a membrane processing unit for further removing the impurities with large particle size and a sludge processing unit for disposing sludge. The specific equipment comprises a chemical feeding system, a micro interface coagulation reaction box, an inclined tube sedimentation box, an intermediate booster pump, a filter, an ozone catalytic oxidation reactor, an activated carbon adsorption device, a membrane processing device, a stacked type sludge water extractor and a matching pipeline and valve control system. By the equipment, corresponding processing unit can be started through the preset pipeline control system according to different destinations of treated wastewater, and modular treatment of different kinds of oil well operation wastewater is realized.

The invention discloses a non-phosphorus scale and corrosion inhibitor, which is characterized by comprising the following productive raw materials by weight portion: 5 to 80 portion of deionized water, 5 to 60 portions of polyepoxysuccinic acid, 1 to 10 portions of methylbenzotriazole, 3 to 20 portions of sodium gluconate, 1 to 10 portions of imidazoline and 2 to 15 portions of sodium tungstate. The non-phosphorus scale and corrosion inhibitor is a completely non-phosphorus medicament. Experiments show that the non-phosphorus scale and corrosion inhibitor has a scale inhibition rate of above 95 percent, a stainless steel and copper corrosion rate of less than or equal to 0.005mm/a and a carbon steel corrosion rate of less than or equal to 0.075mm/a and realizes phosphor-free discharge, wherein both the scale inhibition rate and the corrosion inhibition rate reach related national and industrial standards. The non-phosphorus scale and corrosion inhibitor has the advantages of radically solving the problem of the discharge of phosphor in circulating water, laying a good foundation for the governance and recycling of discharge water and providing a new environmental protection means.

A motor train unit traction system powered by power packs and energy storage devices in a mixed mode mainly comprises the power packs, the energy storage devices, traction converters and traction motors, wherein the traction converters are connected with the traction motors, a diesel engine and an electric generator form each internal combustion power pack, three-phase output of the electric generators are directly connected with the traction converters, and the energy storage devices are connected with middle direct-current buses of the traction converters. The motor train unit traction system can achieve cross-line running and meet different requirements for transportation in different environments. In a non-electrification road section, the power pack and energy storage device mixed power supply mode is adopted so that normal running under the working condition without a contact system can be achieved. Under the working condition that power is supplied by the power packs and no contact system exists, braking energy is absorbed through the energy storage devices, and therefore recycling of energy is achieved and the green energy saving concept is embodied. Power supplying can be achieved in the acceleration process of a train through the energy storage devices so that the optimum acceleration performance can be achieved. Due to the adoption of the energy storage devices, a power train unit can have the operating capacity in the non-electrification road section and have an emergency rescue function and a war preparedness function in special rainy and snowy days or under the condition that the contact system is damaged, and can also be used as a mobile power supply.

The invention discloses an L-shaped full-closed environment-friendly hot galvanizing production method. The method is characterized in that: acid washing step-by-step automatic operation is implemented by adopting a mechanical hydraulic transmission manner, namely an acid washing workpiece automatic conveying system horizontally or vertically lifts to automatically convey workpieces to be galvanized to specified anti-collision acid washing tanks for acid washing and dust removing treatment step by step according to the multi-tank acid washing technological requirements, and the whole acid washing process is sequentially, progressively and automatically finished according to the technological requirements. The L-shaped full-closed environment-friendly hot galvanizing production method is pollution-free, environment-friendly, low in energy consumption, mechanical and automatic, and has the characteristics of full closure and integration of reclamation and treatment; and by the method, acid washing automation is realized, the labor intensity is furthest lightened, the production efficiency is improved, and the problem of pollution is solved.

The invention discloses a treatment method for percolate in domextic garbage landfill area, which comprises, taking ammonia blow-off to the percolate to degradate the ammonia and nitrogen; taking coagulate and deposite treatment to remove the biochemical property of organic and suspended matter; taking biochemical treatment and following membrane treatment. It also discloses the opposite system, which comprises connected by pipes an adjust pond, a pre-aeration pond, a first deposition pond, an ammonia blow-off tower connected to absorption tower, a middle pool, a second deposition ponds, an A2/0 technical device, an end deposition pond, a temporary storage pond, a membrane treatment system and clear-water pond; wherein, three deposition ponds and the membrane treatment system connects to sludege pond linked with pressure filter.

A method for recovering lead from lead-containing solid wastes comprises the following steps: 1, fragmenting the lead-containing solid wastes, ball-milling, leaching with an alkali chloride-alkaline earth metal chloride solution or an alkaline earth metal chloride solution as a leaching agent, and filtering; 2, adding an NaOH solution or solid NaOH to a filtrate obtained in step 1 for completely converting PbCl2 in the solution at 20-90DEG C for 30-120min to form basic lead chloride, filtering after the reaction completion, and washing to obtain a filtrate and a filter residue which is basic lead chloride; 3, adding basic lead chloride to the NaOH solution for completely converting basic lead chloride into lead hydroxide, filtering after the reaction completion, washing to obtain a filtrate and a filter residue which is lead hydroxide, and carrying out drying dehydration of lead hydroxide to form lead oxide; and 4, recovering or regenerating the leaching agent. The method has the advantages of simple process, simple operation, low processing cost, high lead recovery rate and no pollution to the environment.

The invention is a continuous carbonization process directed at municipal solid waste and an apparatus used therein. The process can mainly overcome problems occurred in treatment of municipal solid waste in the prior art, e.g., generation of oncogenic dioxin in burning of municipal solid waste. The process can realize pollution-free treatment of garbage. The invention has the following advantages: combustible gas produced in cracking and carbonization of municipal solid waste under high temperature and anaerobic conditions is used as an energy source for a system, thereby realizing self-sufficiency of energy; the anaerobic condition can well inhibit generation of dioxin; treating flow of the process is simple and stable, and long-time continuous treatment of municipal solid waste is realized; drying of municipal solid waste, deodorization of gas, circulation of heat and the like are realized.

The invention relates to a method for producing a potassium fertilizer and aluminum oxide by comprehensively using potassium feldspar. The method comprises the following steps of: (1) smashing potassium feldspar and inorganic chlorate, and burdening potassium feldspar, inorganic chlorate and potassium carbonate in the mass ratio of 1:(1-2):(1-10); (2) pelletizing the prepared material, and sintering at the temperature of 500-1,200 DEG C for 1-5 hours to obtain a sintered material and generate CO2 gas simultaneously; (3) soaking the material obtained in the step (2) into water and filtering; (4) introducing a filtrate obtained in the step (3) into the CO2 gas obtained in the step (2) to obtain an aluminum hydroxide precipitate, and filtering; (5) adding a filtrate obtained in the step (4) into nesquehonite, introducing CO2 gas to obtain a complex salt precipitate, filtering and crystalizing a filtrate to obtain a potassium chloride chemical fertilizer; and (6) adding water for dissolving a complex salt obtained in the step (5) to obtain a solid of nesquehonite, circularly using, heating a potassium bicarbonate solution for decomposing to obtain a potassium carbonate solution for circularly using, and repeating the step (1) to the step (6).

The invention provides a method for preparing natural gas by dry quenching co-production coal. In the method, reducing gas is taken as heat-carrying gas, refrigerant and a pyrolytic process thereof are adopted to recover a great quantity of sensible heat of high-temperature coke so as to couple the dry-method coke quenching process and the coal pyrolytic process of high-temperature metallurgical coke, thus cancelling a gas and air supply system, a combustion control system and a waste gas discharging system in the original pyrolytic process, avoiding pyrolytic combustion process, saving a great quantity of energy, and realizing smoke-free, NOX-free, SOX-free and CO2-free discharging. Meanwhile, gasification gas produced by pyrolytic gas and semi-coke gasification is used for producing andsynthetizing natural gas in a methanation manner so as to realize clean conversion of coal. In addition, the method cancels N2 preparation equipment and waste heat boiler systems in dry quenching, thus simplifying the operation and maintenance process and greatly lowering investment and operation cost.

The invention provides a negative-pressure liquid nitrogen subcooler and a method therefore for reducing liquid nitrogen temperature. The negative-pressure liquid nitrogen subcooler comprises a liquid nitrogen conveying system, a subcooler system, a negative-pressure air exhausting system and a discharging system, wherein the liquid nitrogen conveying system is used for supplying liquid nitrogen to the subcooler system; the negative-pressure air exhausting system is used for reducing pressure for the subcooler; and the discharging system is used for discharging gasified nitrogen. In the negative-pressure liquid nitrogen subcooler, an electric heater is adopted to raise the temperature of gaseous nitrogen to 20-30 DEG C, so that the subcooler is not limited to the weathers; a liquid level sensor is adopted to automatically regulating the opening of a pneumatic regulating valve, so that the height of the liquid level is maintained. The method comprises the steps of: firstly, injecting the liquid nitrogen for a liquid nitrogen container and regulating pressure; then injecting the liquid nitrogen for the subcooler, wherein the height of the liquid level of the liquid nitrogen in the subcooler is kept constant; then starting the negative-pressure air exhausting system, and cooling the liquid nitrogen through a heat exchanger; and finally, recovering the liquid nitrogen and discharging the liquid nitrogen. According to the invention, the temperature of a heat sink can be further reduced, the temperature of the heat sink is regulatable within a range of 70-77k, and the advantagesof simple equipment, good effect and low operating cost are achieved.

The invention discloses a preparation method of polyurethane prepolymer with low free isocyanate monomer. The preparation method comprises the following steps of: forming into mixed alcohol by trihydric alcohol and dihydric alcohol under the temperature of 120-150DEG C, and carrying out vacuum dehydration; putting isocyanate monomer and ester solvents into a reactor to keep the temperature at 30-70DEG C, and dropwise adding the mixed alcohol into the reactor; after dropwise adding, continuously reacting for 3-6h under the temperature of 40-70DEG C under stirring, and discharging in a cooling way to obtain polyurethane prepolymer; and separating the obtained polyurethane prepolymer, and adjusting the solid content of polyurethane prepolymer solid and the content of free isocyanate monomer in the separated heavy components by diluted solvent. According to the preparation method, the real continuous production can be realized, all the recovered solvent and isocyanate monomer can be recycled, the zero emission can be realized, and the real clean production can be realized; and the product has the characteristics of being low in viscosity, high and adjustable in NCO value content, low in the content of the free isocyanate monomer, high in solid content, good in compatibility, etc.

The invention discloses a method for treating molasses alcohol waste water. The method is characterized by comprising the following steps: (1) concentrating molasses alcohol waste water in an evaporator, thereby obtaining the concentrated slurry; (2) discharging waster water in the evaporator in a form of vapor condensed water, wherein the condensed water is recycled for alcohol production; (3) preparing dry powder after the concentrated slurry is incinerated in an incinerator; or (4) combusting the concentrated slurry with combustibility in a boiler to generate vapor; and (5) recycling the vapor for alcohol production and heating in waste water concentration. The method is main used for recycling water and solids and heat in the waster water and is a method for comprehensive treatment and utilization. The molasses alcohol waste water is concentrated in the evaporator, then is prepared into the dry powder, or the concentrated slurry with combustibility is combusted to generate vapor, and then the vapor is recycled for alcohol production and waste water concentration. The waste water in the evaporator is recycled for alcohol production in the form of vapor condensed water, thus an alcohol production closed-loop water system without waste emission is realized.

The invention discloses a desulfurization wastewater zero-emission system using a coal-fired flue gas semidry method to remove fluorine and chlorine. The desulfurization wastewater zero-emission system comprises a high-concentration alkali liquor pipeline, a desulfurization wastewater pipeline, a diluted alkali liquor pipeline, an alkali liquor atomizing device, a compressed air pipeline, a process water pipeline and a flue. The flow of high-concentration alkali liquor is controlled according to unit load and the HCl concentration in flue gas, the high-concentration alkali liquor is mixed with desulfurization wastewater to obtain diluted alkali liquor, the diluted alkali liquor is sprayed into the flue between an air preheater and a dust remover through the alkali liquor atomizing device with multiple nozzles in grid arrangement, the diluted alkali liquor is sufficiently evenly mixed with the flue gas to solidify most of gas such as HCl, HF. SO3 and the like in the flue gas into fly ash, the emission quantity of the desulfurization wastewater is reduced greatly, the desulfurization wastewater can be sprayed into the flue as the base solvent, and zero emission of the desulfurization wastewater is achieved. The desulfurization wastewater zero-emission system has the advantages that the system is low in influence on smoke temperature, the tail flue and equipment, the tendency of fouling corrosion of the tail low-temperature flue and the equipment can be reduced effectively, the desulfurization efficiency is increased, and the system is simple, low in investment and low in operation cost.