38results about How to "Efficient emission reduction" patented technology

A method and device for desulfurization of the smoke discharged from ship by sea water are provided. The method comprises: washing by sea water, discharging acidic sea water, deacidifying and discharging the deacidified sea water. The device includes scrubber and water-saving deacidification plant. The upside of the scrubber is the wash layer which connects to the washing sea water pump through lines. The downside of the scrubber is cooling layer. The one side of the scrubber connects to the discharging line of the ship engine through the washing gas inlet lines. The other side of the scrubber connects to the washed gas outlet lines. The bottom of the scrubber connects to the water-saving deacidification plant. The water-saving deacidification plant connects to pump for mixing sea water, blower fan and total water outlet line for discharging the deacidified sea water.

The invention relates to the technical field of biomass energy, and in particular to a freshwater chlorella strain (i) Chlorella sorokiniana ( / i) GS03 and application thereof to industrial flue gas CO2 fixation and production of microalgae biodiesel. The chlorella strain (i) C.sorokiniana ( / i) GS03 provided by the invention has a preservation number of CCTCC M2013607, and higher CO2 tolerance, higher fixation efficiency of high-concentration carbon dioxide and higher biomass yield and oil yield compared with the reported microalgae strains. Therefore, the invention can greatly reduce microalgal oil production cost, and provides a good production strain for algae for efficient fixation of CO2 in typical industrial flue gas environment and biodiesel production from microalgae oil, and shows great application prospect in the field of biomass energy.

The invention discloses an emission reduction system for fine particles in the sintering process of iron ore, and belongs to the technical field of emission reduction of pollutants in the sintering process of iron ore. The emission reduction system for fine particles in the sintering process of iron ore comprises a fine particle atomizing and agglomerating device, an agglomerating liquid adding device and a dust removing device. The bottom of a sintering pallet is connected with a main flue through air bellows, air draft smoke is combined in the main flue through the bottom of the sintering pallet via the air bellows, the atomizing and agglomerating device, the agglomerating liquid adding device and the dust removing device are arranged on the main flue, and the smoke flows into the atomizing and agglomerating device from the main flue, and is subjected to dust removal by the dust removing device and then discharged into a chimney by a draught fan. By means of the emission reduction system, agglomerating liquid fog drops with fine particles adsorbed nucleate, collide and grow under the low-pressure condition, and form large particle agglomerated mater, the fine particles growing through agglomeration are removed with the dust removing device, and thus a bran-new emission reduction approach is provided for emission reduction of the fine particles in the sintering process of iron ore.

The invention discloses an intensified method for denitrification by ammonia injection in the production process of iron ore pellets. The method is to prepare pellets with high bursting temperature and good thermal stability by adding anti-burst additives to the pellet binder bentonite. In this way, the thickness of the material layer in the heat treatment process of the pellets is increased by 1.5 to 1.75 times, the machine speed is reduced to 4 / 7 to 2 / 3, and the exhaust wind speed in the second drying section is reduced to 0.8 to 1.0m / s. Ammonia water is evenly sprayed into the air stream for denitrification. The advantages of the present invention are: due to the operation of the thick material layer and the reduction of the airflow velocity, the time for the airflow to pass through the pellet material layer is prolonged, and the concentration of iron-containing minerals and NOx, NH in the denitrification catalyst is improved. 3 The action time is longer, thereby enhancing the efficiency of ammonia spray denitrification in the drying section, and the NOx removal rate is increased by 15% to 30%.

The invention discloses a method for reducing NOx emission in the iron ore sintering process based on modified fuel, and relates to the technical field of emission reduction of sintering pollutants. In the present invention, the sintered ore is first finely ground to obtain the sintered ore fine material, and then the sintered ore fine material is added to the fuel for dry mixing without adding water to obtain a modified fuel, and then the modified fuel is mixed with iron-containing The raw materials and flux are mixed and granulated to obtain the mixture, which is loaded on the trolley, and the mixture is ignited and ventilated for sintering; the invention fully dry-mixes the fine sintered ore and fuel to make it loose It is distributed around the fuel; NOx will be generated during the fuel combustion process, and the loosely distributed sinter fines can efficiently catalyze the reduction process of NOx, thereby realizing the efficient reduction of NOx emission during the iron ore sintering process.

The invention discloses a method for denitrification in a sintering process by utilizing various types of flue gas, comprising the following steps: analyzing the components of flue gas from different kilns; assembling and mixing the flue gas in a gas cabinet, and monitoring at the outlet of the gas cabinet in real time Flue gas composition and temperature, adjust the flue gas composition plan, confirm that the composition CO and temperature of the assembled flue gas meet the requirements, so that the assembled flue gas passes through the sintering trolley being produced; After coming out, the flue gas is led to the sintered ore ring cooler for NO removal, and the flue gas after NO removal is used for waste heat recovery to form an external circulation; The flue gas is combined with the flue gas to form an internal circulation. The invention has obvious effect of treating waste by waste, and provides a new idea for efficient emission reduction of NOx in the sintering process.

The invention discloses a waste gas cyclic denitration method for iron ore pellets. According to the method, NOx-containing flue gas generated by the iron ore pellets in the production process of theiron ore pellets is cycled to a medium and low temperature cooling zone, and at the medium and low temperature cooling zone, ammonia spraying denitration is carried out. The specific method comprises:converging waste gas at a down-draft drying zone with high-sulfur flue gas at a preheating warming zone, of which SO2 concentration is greater than 300mg / m<3>; and sequentially carrying out dust removal and desulfuration purification, desulfurizing to SO2 concentration of 50mg / m<3> or below; then converging the obtained gas with front-zone waste gas at the preheating warming zone, of which SO2 concentration is lower than 300mg / m<3>; cycling the obtained gas into the medium and low temperature cooling zone to use as a cooling medium; before cycled waste gas enters a cooling-zone material layer, spraying NH3; then filling the cycled waste gas into the material layer to carry out SCR denitration; controlling a molar ratio of NH3 to NO within a range of 0.3 to 0.5, so as to realize NOx emission reduction by 15% to 25%.

The invention discloses a composite bacterial agent for reducing nitrous oxide discharge in the composting process and an application thereof. The compound microbial agent comprises Marivirga tractuosa, Prevotella denticola and Desulfotomaculum ruminis. The three strains of the present invention act synergistically and can more efficiently reduce the greenhouse gas nitrous oxide into harmless nitrogen. The emission reduction of oxygen and nitrogen oxides reached up to 402μg / kg. The addition of these bacterial agents can effectively control the emission of nitrous oxide during the composting process and protect the ecological environment.

The invention relates to a method and a device for simultaneous desulphurization and denitration by a flue gas-seawater method. The method comprises the following steps: A) catalyzing and washing the flue gas containing SO2 and NOx by seawater to remove the SO2 and the NOx in the flue gas, and then discharging the purified flue gas subjected to the desulphurization and the denitration and discharging acid seawater formed during washing; and B) recovering the quality of the seawater, namely adding the seawater into the acid seawater and blowing the air into the acid seawater, and discharging the seawater when the quality of the acid seawater is recovered to accord with the environment-friendly requirement. The method and the device for simultaneous desulphurization and denitration have the advantages that chemical raw materials are not needed, the emission reduction efficiency and reliability are high, the occupied area is small, the construction and running costs are low, and the method and the device are particularly suitable for simultaneous desulphurization and denitration for boiler flue gases of large and medium-sized heat power plants.