63results about How to "Achieve clean emissions" patented technology

The invention belongs to the technical field of the chemical production, and relates to a technology for optimizing energy saving and integrating treatment of waste water, waste slag and waste gas in a furfural production process, which is suitable for the energy saving and the three-waste treatment and reformation of furfural production enterprises. The technology is characterized in that limestone and dolomite are used for neutralizing furfural waste water to convert acetic acid into calcium magnesium acetate, and then the water exchanges heat with high-temperature aldehyde gas generated by a hydrolysis kettle to enter an evaporator; high-temperature vapor generated by the vaporization of the waste water enters the hydrolysis kettle to be used as a reaction medium, the residual concentrated liquid is decolorized for extracting calcium magnesium acetate salt, and the residual liquid is used for smoke desulfurization and denitration. After the low-pressure automatic heating and vaporization of high-temperature aldehyde slag for furfural recovery, the high-temperature aldehyde slag is dried at a low temperature to reduce the water content of the aldehyde slag to be lower than 20 percent. The invention has the advantages that the utilization rates of materials and energy are greatly increased, the zero discharge of three wastes is realized without additional energy consumption, and the calcium magnesium acetate salt of high value is also prepared. After the automatic heating distillation and low-temperature drying of the aldehyde slag, the aldehyde slag is used for active carbon and is effectively and cleanly burnt.

The invention provides a downdraft type fixed bed gasifying steam power generation co-production device. The device comprises a gasifying system and a power generation system. The power generation system is driven by the gasifying system to work, and comprises a gas combustion chamber which is connected with a gas pyrolysis fan and a gas gasifying fan. An air preheater and a boiler heating face are arranged in a desulfuration chamber, the top of the desulfuration chamber is connected with a tail gas treatment device, a middle boiler body is connected with a low-pressure cylinder of a turbine through a pipeline, and a generator is mounted on the turbine. Biomass pyrolysis gas biomass charcoal-power co-production is based on the characteristic that the combustible components of biomass are composed of a volatile component and fixed carbon, a decoupling reaction mode is adopted, fixed carbon in biomass is converted into nitrogenous activated carbon with efficient desulfuration properties, the volatile component is converted into pyrolysis gas and gasified gas to be combusted, electric energy is obtained, macromolecular tar in the pyrolysis gas is utilized for reducing nitric oxide generated during gas combustion, and clean emissions of combustion tail gas are achieved.

The invention provides a treatment device and method for slag obtained after overhauling an aluminum electrolysis cell. The treatment method comprises the following steps: crushing the slag obtained after overhauling the aluminum electrolysis cell, mixing the crushed slag with a lime fluoride retention additive, grinding the mixture, performing powder selection circulation to obtain powder, and combusting the powder in a cement kiln, so as to completely eliminate hazards and enable the aluminum electrolysis cell to completely lose toxicity. According to the treatment device and method for slag obtained after overhauling the aluminum electrolysis cell, the overall treatment process is carried out in a sealing environment, exhaust gas generated is basically dry gas and finally discharged after being combusted, so that the clean emission is realized, and the secondary atmospheric pollution is avoided; besides, residue generated is used as a cement clinker and can be effectively reutilized, the risk of secondary pollution is completely eliminated, and the environment and production safety is also realized.

The invention discloses a harmless fixed bed thermolysis system for zinc and cadmium super accumulator plant. The dried zinc and cadmium supper accumulator plant is in the thermolysis in the thermolysis furnace, the thermolysis gas produced in the thermolysis is treated again and is burnt by the burning comprehensive utilization system, the hot smoke from the burning comprehensive utilization system is used partly for drying the zinc and cadmium super accumulator plant and partly for supplying the heat for the thermolysis furnace, the thermolysis temperature depends on the heat released from the hot smoke produced in the burning of fuel oil, part hot smoke from the burning comprehensive utilization system and the thermolysis and burning reaction of the zinc and cadmium supper accumulator plant in the thermolysis furnace, after the hot smoke from the burning comprehensive utilization system is used for drying zinc and cadmium super accumulator plant, the smoke is purified by the adsorption of the activated carbon and discharged. The thermolysis is adopted, over 90% of cadmium and over 99% of zinc can be fixed in the thermolysis coke, the harmless treatment of the zinc and cadmium super accumulator plant and the energy comprehensive utilization.

The invention relates to a self-heat-supply type sludge dewatering and drying method and system. The dewatering and drying method comprises the following steps: firstly, adding a flocculation chemicalto to-be-treated sludge, and performing concentration and dewatering to obtain concentrated sludge; adding a sludge conditioner to the concentrated sludge, and stirring the sludge uniformly to obtainconditioned sludge; performing press filtration dewatering on the conditioned sludge to obtain a sludge filter cake; crushing and drying the sludge filter cake in high-temperature flue gas to obtaina dust and sludge mixture; conveying the dust and sludge mixture to a gas-solid separation device, and separating the sludge from the flue gas to obtain powdery sludge with water content being 15wt.%-20wt.%; feeding the sludge into a combustion heat supply mechanism after granulation, performing combustion to obtain high-temperature flue gas, cooling the high-temperature flue gas and conveying thehigh-temperature flue gas to a crushing and drying device. The method and the system are high in continuity and dewatering degree, the sludge treatment process is short, the operation cost is low, anexternally added heat source is not needed, so that energy cost is reduced greatly, and the sludge mass is further reduced by combustion.

The invention belongs to the technical field of waste gas purification, and particularly relates to a water-spray-type tubular dust collector. According to the water-spray-type tubular dust collector provided by the invention, the technical principles of an impingement dust collector and a water-film-type dust collector are combined together, the dust of the saturated wet flue gas can be removed, and the problems of dedusting and demisting the flue gas treated by a wet desulfurization device can be solved. The water-spray-type tubular dust collector is generally applied to the electric power environmental protection industry, and has the working position at the downstream part of the flue gas wet desulfurization device (FGD) of a thermal power plant; a water film is formed on the surface of a dust collection tube bundle in a water pouring way or a water spray way, so that impurities such as fine particle dust, gypsum, liquid water and the like in the flue gas can be caught; therefore, the clean emission of the flue gas of the thermal power plant can be realized, and the dust removing efficiency and the long-term work stability of equipment are guaranteed.

The invention belongs to the field of municipal solid waste treatment and the technical field of coal-fired boiler flue gas denitration, and particularly relates to a method for denitration of a coal-fired power plant boiler through synergistic recycling of sludge and coal slime. The sludge or the coal slime or a sludge and coal slime mixture is subjected to preliminary dehydration through a mechanical device, the semi-dry sludge or coal slime or sludge and coal slime mixture is subjected to pyrolysis gasification by using flue gas waste heat of a power plant, gasified gas, liquid and solid products are added into the coal-fired boiler of the power plant from reasonable positions, pyrolysis gas and coke are used for strengthening denitration independently or in cooperation with SNCR reaction, liquid tar and the coke are effectively used for supporting combustion, resource clean utilization and harmless treatment of the coal slime and the sludge are achieved while the denitration efficiency of the boiler is improved, heat energy is fully coupled and utilized, and economic benefits and social benefits are remarkable.

A method for recycling and preparing metal chromium comprises the steps of recycling chromium element from discharged waste liquid and discharged waste material, and utilizing the recycled chromium element to prepare metal chromium. The method prevents environmental pollution, realizes application of chromium resources, is simple in technology and low in cost, and can obtain metal chromium products which can meet the use requirement.

Disclosed is a combustion device (100) for solid fuels. An air inlet side (101) is formed above a furnace grate (14) in a furnace (10) and on one side of a fuel stocking layer (1) of the combustion device (100), a combustion side (102) is formed in the furnace (10) on the other side opposite to the fuel stocking layer (1); a shuffle mechanism (6) is arranged in the fuel stocking layer (1) above the furnace grate (14) for receiving the solid fuels, and the fuels in a combustion state can be shuffled by controlling the movement of the shuffle mechanism (6), which is beneficial for discharging ash.

The invention discloses a hollow porous micro-nano ceramic-tube-beam water-film type integrated removal apparatus for flue gas pollutants, and belongs to the coal-fired power plant energy-saving emission-reduction technologies. The apparatus comprises an upper cover plate (1), a hollow porous micro-nano ceramic-tube-beam assembly (2), a water inlet chamber (3) and associated pipelines (4) thereof, a sewage chamber (11) and associated pipelines (12) thereof, an upper glass fiber reinforced plastic support plate (7), a lower glass fiber reinforced plastic support plate (8), a front side plate (9), a rear side plate (10), and sealing fixing parts. Under driving of pressure difference, a dense water film is formed on the outer surface of a ceramic pipe (17), when flue gas transversely skims over the ceramic-tube-beam assembly (2), gypsum liquid drops, water vapor, tiny particles, and SO2, H2SO4(SO3) aerosol and other acidic compositions in flue gas are captured by the water film, the captured pollutants and condensed water float down the stream, are gathered in the sewage chamber (11), and are sent to a sewage disposal plant through the sewage pipelines (12). The apparatus is simple in structure, low in cost, resistant to corrosion and long in service life, is capable of realizing clean discharge of a coal-fired power plant, also is capable of recovering and utilizing water source in flue gas, and possesses extensive engineering application prospect.

The invention discloses a gas water heater which comprises an air heater, a heat exchanger and a smoke exhaust fan. The air heater comprises a combustion chamber and a combustor arranged in the combustion chamber. The combustion chamber is provided with a cold air inlet, a hot air outlet and a gas inlet. The combustor is configured to enable the concentration of nitrogen oxide in generated hot air to be smaller than or equal to 30 mg/m<3> and the concentration of carbon monoxide in the generated hot air to be smaller than or equal to 50 mg/m<3>. The heat exchanger comprises a water storage tank and a heat exchange part. The heat exchange part is provided with a water inlet, a water outlet, an air inlet and an air exhaust opening. The water outlet communicates with the water storage tank. The air inlet communicates with the hot air outlet. The heat exchange part is configured to enable water entering from the water inlet to exchange heat with air entering from the air inlet. The smoke exhaust fan is used for sucking hot air generated by the combustor into the heat exchange part. By means of the gas water heater, generation of harmful gas of CO, nitrogen oxide and the like can better reduced, clean exhausting can be achieved, and the heat exchange efficiency between hot air and water can be improved.

A novel ship tail gas treatment system is provided with an air compression system and a soot blower, the air compression system is connected with a flue gas mixer, the flue gas mixer is connected withan SCR reactor, the soot blower is connected with the SCR reactor, tail gas exhausted by a fuel main engine enters the flue gas mixer, and the flue gas mixer is connected with an ammonia gas conveying system. The ammonia gas conveying system is provided with a liquid ammonia fuel storage tank and an ammonia gas liquefaction device, a liquid ammonia low-pressure pump is arranged in the liquid ammonia fuel storage tank, and liquid ammonia is pumped out through the liquid ammonia low-pressure pump and finally enters the flue gas mixer. Volatile gas in the liquid ammonia fuel storage tank is fully utilized, the method is preferentially applied to ammonia fuel main engine tail gas denitrification treatment, and the ammonia gas liquefaction device is arranged as a supplement means for ammonia volatile gas treatment, so that the volatile gas in the liquid ammonia storage tank can be completely treated, the pressure rise and structural damage of the liquid ammonia storage tank caused by continuous accumulation of the ammonia volatile gas are avoided, a large amount of the ammonia volatile gas is prevented from being discharged to the atmosphere, and the safety of the liquid ammonia storage tank and a ship is guaranteed.

A solid fuel combustion method and combustion device (100). The combustion device (100) comprises a furnace (10). The side of a fuel stack layer (1) close to a combustion cavity (3) forms a combustion side (102), and the other side opposite the combustion side (102) forms an air inlet side (101). The air inlet side (101) is provided with a side wall (6) that provides air only to the upper portion of the fuel stack layer (1).

The invention provides an oily pollutant ultraclean treatment process and oily pollutant ultraclean treatment equipment, and relates to the technical field of oily pollutant ultraclean treatment. Theoily pollutant ultraclean treatment equipment comprises a crusher, a feeder, a thermal desorption furnace, a combustion fan, an oil-gas dust collector, a combustion-supporting air heater, an oil-gas two-phase separator, an oil-gas condenser, a three-phase separator, a non-condensable gas buffer tank, an oil phase buffer tank, a wastewater tank, a high temperature heat conductive oil storage tank,a generator set, a low temperature heat conductive oil storage tank and a distributed control system (DCS) intelligent autonomous control system. Oily pollutants are quantitatively conveyed to the feeder in an airtight way through a pipeline after being crushed by means of the crusher, and is then transported to a thermal desorption device, so that the labor intensity is lightened; an anaerobic thermal desorption reaction is realized by means of high temperature anaerobic operation; the non-condensable gas is recycled as fuel; the total petroleum hydrocarbon (TPH) of the treated solid phase residue is less than 0.05 percent; a closed dry slagging technology is adopted, so that clean discharge of the residue is realized; a flue gas waste heat recovery heat exchanger and the oil-gas condenser are used for realizing waste heat recovery; after the generator set is used for power generation for reuse, the recovery utilization rate of the waste heat can reach 90%.

The invention comprises a steel cylinder, an air-filled composite valve, an integrated valve, a magnetic switch valve, a pressure-relief valve, a stop valve, a gas filter, a changeover switch, a gas common rail pipe, a jet magnetic valve, an absolute pressure transducer and a controller. Several jet magnetic valves and the absolute pressure transducer are mounted on the gas common rail pipe. The control lines of the stop valve, the magnetic switch valve, the integrated valve and the jet magnetic valve and the signal wire of the absolute pressure transducer are connected with the controller separately.

The invention discloses a plasma on-duty flame igniter based on an aero-engine afterburner. The plasma on-duty flame igniter comprises a flame stabilizer and an embedded cathode combination. The embedded cathode combination comprises a connecting sleeve, a cathode shell, a transverse insulating pipe, a Y type cathode, a guide rod shell, a longitudinal insulating pipe and a power-on guide rod. Theconnecting sleeve is in threaded connection with the cathode shell, the right end of the connecting sleeve is welded to the flame stabilizer, the left middle portion of the transverse insulating pipeis arranged in the cathode shell, and the closed end of the Y type cathode is arranged in the transverse insulating pipe. The guide rod shell is vertically arranged on the top of the left side of thecathode shell, the upper middle portion of the longitudinal insulating pipe is arranged in the guide rod shell, after the lower end of the longitudinal insulating pipe penetrates through the cathode shell, the end of the longitudinal insulating pipe is located in the right portion of the transverse insulating pipe, and the upper middle portion of the power-on guide rod is arranged in the longitudinal insulating pipe. The problems that an existing aero-engine afterburner is bad in working environment and complex in structure, and stable rapid ignition and continuous organized combustion are notfacilitated.

The invention relates to a system and a method for treating domestic garbage and sewage sludge. In a pyrolysis unit of the system, a pyrolysis device is equipped with a feeding port, a pyrolytic oil gas outlet and a pyrolytic carbon outlet; in a pyrolytic oil gas treating unit, an oil gas separating device is equipped with a pyrolytic oil gas inlet, a pyrolytic gas outlet and a pyrolytic oil outlet; the pyrolytic oil gas inlet is connected with the pyrolytic gas outlet; an oil water separating device is equipped with a pyrolytic oil inlet, a tar outlet and a sewage outlet; the pyrolytic oil inlet is connected with the pyrolytic oil outlet; an evaporation device is equipped with a sewage inlet, a steam outlet and a sewage concentrated liquid outlet; the sewage inlet is connected with the sewage outlet; in a pyrolytic carbon treating unit, a cooling device is equipped with a pyrolytic carbon inlet, a water vapor inlet, a cooling pyrolytic carbon outlet and a water vapor outlet; the pyrolytic carbon inlet is connected with the pyrolytic carbon outlet; and the water vapor inlet is connected with the water vapor outlet. According to the invention, the pyrolytic gas, tar and pyrolytic carbon energy with high calorific value can be acquired, the yield is higher, the energy consumption of the system is lower and the running cost is lower.

The invention relates to a method and device for harmless treatment of industrial waste salt by utilizing alkaline melt. Aiming at the characteristics that the organic matter contained in industrial waste salt is complicated and is difficult to remove, a melting reaction furnace device is adopted to heat and melt inorganic salt; industrial waste salt and oxidizing gas are fed; the organic matter contained in the industrial waste salt can decompose and gasify in the reaction furnace; the residues are high-purity salt products; and the industrial salt product not containing the organic matter isobtained through dissolving, washing and multiple evaporative crystallization. Compared with the prior art, the raw materials are available, the operation is simple, and secondary pollution includingharmful acid gas and Dioxin is not generated; harmless treatment of the industrial waste salt containing the organic matter and resource recycling of the salt components are realized; and the methodis low in investment cost, and wide in applicable range and has higher environmentally-friendly and economic benefits.

The invention discloses a composite purification device and process suitable for dusty gas, and a purification device. The purification device comprises: a dust hood for collecting dusty flue gas; aninduced draft fan used for providing power for conveying the dusty flue gas; and a purification tower, wherein a flow guide device, a first spraying layer, a liquid holding turbulator, a filler layerand a second spraying layer are sequentially arranged in the purification tower from bottom to top, a flue gas inlet of the purification tower is positioned below the first spraying layer and is communicated with the dust hood through the induced draft fan, and the flow guide device is a half-tube type flow guide device. Due to the fact that the dust removal device of the process system adopts thecomposite purification tower, clean emission of gas can be achieved, and pollution to the surrounding environment is reduced.

The invention belongs to the technical field of waste gas purification, and in particular relates to a horizontal fluorine plastic tube type dust and mist collection device mounted inside an absorption tower. The horizontal fluorine plastic tube type dust and mist collection device is mounted inside an absorption tower (1) and comprises dust and mist collection tube bundles (7), a support unit and a water flushing unit, wherein the dust and mist collection tube bundles (7) consist of ''U''-shaped tubes and are arranged in a wave manner in a horizontal direction; a plurality of the horizontal fluorine plastic tube type dust and mist collection devices are horizontally mounted in parallel inside the absorption tower (1); and one end with a surface plate (3), of each horizontal fluorine plastic tube type dust and mist collection device, extends outside the absorption tower through an absorption tower flange (15). The horizontal fluorine plastic tube type dust and mist collection device is applied to the power environmental protection industry and works in the absorption tower of a flue gas desulfurization (FGD) device of a thermal power plant, fume is purified by using a cold source in a cooling manner, or liquid membranes are formed on surfaces of the fluorine dust and mist collection tube bundles in a water spraying mode to capture impurities such as fine particle dust, gypsum and liquid water, and thus cleaning discharge of fume of the thermal power plant can be achieved.

The invention discloses a sludge biomass high-temperature gasification treatment method and treatment system which are low in energy consumption, capable of effectively deodorizing, more sufficient incombustion, capable of greatly increasing the burn-off rate, more energy-saving and more environmentally friendly. The method mainly comprises the following steps: 1, mixing sludge and wood waste; 2,carrying out aging treatment; 3, gasification treatment; 4, utilization of biomass gas; the system comprises a sludge bin, a wood waste bin, a belt conveyor, a mixing machine, an aging device and a biomass gasification furnace, the sludge bin and the wood waste bin are conveyed to the mixing machine through the belt conveyor to form a mixture, the mixture is subjected to aging treatment through the aging device, and finally the mixture is combusted into biomass gas through the biomass gasification furnace to be recycled.