151 results about "Emission limit" patented technology

A method and apparatus are provided for automatic data rate control in wireless communication systems, such as wireless LANs. A data rate controller adapts a transmission rate of said data based on a signal quality and a transmit power level. The data rate controller can also adapt the transmission rate based on one or more of amplifier non-linearities, anticipated signal quality for a next frame transmission, regulatory emission limits and data rate advice. The data rate advice will decrease a data rate if a current signal quality is below a minimum required signal quality for a given data rate and increase a data rate if a current signal quality is above a minimum required signal quality for a given data rate. A probation mechanism allows a higher rate to be evaluated before switching to the higher rate permanently. A retry balance mechanism forces a rate fallback when a number of failed transmission exceeds a predefined threshold. A rate fallback feature reduces the transmission rate when a number of failed transmission exceeds a predefined threshold.

A method of controlling a gas turbine system (10) may include controlling an inlet guide vane position (98) to maintain a turbine (24) exhaust temperature at a corrected value that is a function of a compressor (12) inlet temperature and a turbine (24) normalized load. The method may include selecting the minimum value (138) of a part load tunable value, a part load maximum value and a fixed maximum value of a turbine (24) exhaust temperature for the corrected value. A corrected value setpoint may be determined (94) for the gas turbine system (10) operating at a part load condition where at least one of a fuel flow rate and the inlet guide vane position is controlled (98) so the corrected value does not exceed the corrected value setpoint. The corrected value may prevent a turbine (24) engine from exceeding its firing temperature during operation and ensure the engine operates within combustor dynamics and emissions limits.

The invention provides a system and a method for treating waste acid gas. The system for treating the waste acid gas comprises a rich acid gas thermal reaction treating unit, a claus treating unit, a claus tail gas and poor acid gas burning unit, a burnt tail gas catalytic oxidation acid-making unit, a secondary conversion acid-making unit and a tail gas reheating unit. According to the system for treating the waste gas, the sulfur recovery rate of the whole system for treating the acid gas reaches above 99.99%, the concentration of SO2 in the tail gas emitted to atmosphere is less than 100mg/m<3>, the conversion rate and the emission concentration can meet the highest emission limit standards in the industry, and no waste liquid is discharged from the system.

A system and method for optimizing order fulfillment by considering multiple supply modes in one aspect, plans supply of inventory by forecasting demand, estimating accuracy of said forecasted demand, and establishing reorder point policy based at least on said accuracy of said forecasted demand, a plurality of supply transportation modes, cost of carbon emissions and limit on carbon emission credits. Current inventory position is monitored and if the current inventory position is below the reorder point policy, orders are placed according to a selected shipping method. The selected shipping method may be based at least on customer order priority, transportation budget, and carbon emission limit.

The invention relates to a method and a device for reducing emission limits of nitrogen oxides in waste incineration flue gas. In the method, processes of a waste incineration processing device, an optimizing air supply device, an exhaust-heat boiler device, a selective non-catalytic reduction (SNCR) device, a tail gas processing device and the like are integrated into a whole; by combining clean flue gas serving as secondary air supply and the SNCR device, the situation that the nitrogen oxides in the discharge of tail gas generated after wastes are processed by national waste incineration equipment is not removed effectively in low cost can be changed, and the removal ratio of the nitrogen oxides can be improved; and the removal rate of the nitrogen oxides after the device is optimized is more than 70 percent, so that the concentration of the tail gas discharged finally is lower than 150 mg/Nm<3> specified in the European Union standard 2000. Simultaneously, the optimizing device requires less increment investment and low running cost and is suitable to be applied and popularized in waste incineration equipment at home and abroad, and a denitration device is small in newly increased floor space.

The invention provides a low-NOx grate-rotary kiln pellet production technology. The production technology includes utilizing blended flue gas W exhausted from a down-draft drying section (DDD) and aprimary preheating section (TPH) as cooling air to be delivered to an air inlet of (1) a primary circular cooling section (C1) and (2) an air inlet of a secondary circular cooling section (C2), spraying a reducer into a bottom air box of the circular cooling section (C2), making the reducer and the blended flue gas exhausted from the down-draft drying section (DDD) and the primary preheating section (TPH) to react with NOx so as to achieve SNCR (selective non-catalytic reduction) denitration. The low-NOx grate-rotary kiln pellet production technology has the advantages that the production pressure of enterprise atmospheric pollutant emission limits on pellet calcination equipment can be reduced to a certain degree, and the production technology is saving in investment, low in running costand remarkable in NOx emission reduction effect.

The invention relates to an in-situ regeneration method of an ammonium sulfate poisoning denitration catalyst and belongs to the technical field of an industrial denitration catalyst. The in-situ regeneration method comprises the following steps: (1) when the concentration of nitrogen oxide in outlet flue gas of an SCR (Semiconductor Control Rectifier) main reactor is close to an emission limit value, switching the flue gas to an SCR reserved reactor; (2) introducing hot gas flow into the SCR main reactor and decomposing an ammonium sulfate layer deposited on the surface of the catalyst under the action of the hot gas flow; continuously introducing the hot gas flow for 1 hour to 8 hours to finish regeneration of the denitration catalyst; (3) switching the flue gas back to the SCR main reactor and continually carrying out a denitration reaction. Under the action of the hot gas flow, ammonium sulfate is decomposed into ammonia gas, sulfur trioxide and water steam and is removed along the flowing of the hot gas flow, so that the denitration performance of the catalyst can be recovered. The in-situ regeneration method of the ammonium sulfate poisoning denitration catalyst has the advantages of simplicity in operation, short regeneration time, low regeneration cost, safety and environmental friendliness, high denitration efficiency of the regenerated catalyst, and no changes of the strength and pore structure of the catalyst.

The invention provides a production process and a system of ultralow NOx emission of pellet flue gas. A set of flue gas circulation system is additionally arranged, the flue gas discharged from an airdraft drying section is taken as cooling air to be further conveyed to an air inlet of an annual cooling two-section, meanwhile, a reducing agent is sprayed at the top located at the annular coolingtwo-section, the reducing agent reacts with NOx in the flue gas subjected to the annular cooling two-section, and SNCR denitration is realized; and or the gas discharged from an air outlet of the annular colling two-section is conveyed to a preheating one-section of a chain grate machine after passing through a SNCR treatment system; the high-temperature characteristic of discharging the flue gasfrom the air draft drying section is utilized, meanwhile, the condition of high-temperature sintering ore in the annual colling two-section is utilized, and the part of the flue gas is treated by adopting the SNCR. By the adoption of the technical means, an enterprise atmospheric pollutant emission limit value on the production pressure of pellet roasting equipment requirements can be reduced to acertain extent, and the process and the system have the characteristics of being decreasd in investment, low in operation cost and remarkable in NOx emission reduction effect.

The invention provides an ageing correction method based on dual NOx sensors for an SCR (Selective Catalytic Reduction) catalyst. The NOx sensors are correspondingly arranged at the upstream and downstream of the SCR catalyst of an engine exhaust system to calculate actual conversion efficiency of the SCR catalyst in real time, and the degree of ageing of the catalyst is calculated according to the actual conversion efficiency and ideal conversion efficiency of the SCR catalyst; the feed-forward control quantity of urea is corrected according to the degree of ageing of the catalyst; the brakespecific NOx emission of an engine is calculated in real time; and an OBD (On Board Diagnostics) diagnostic strategy judgment method is provided based on an OBD emission limit. The degree of ageing ofthe catalyst is reflected by a deterioration factor of the catalyst, the ejection amount of urea can be fed back and corrected according to the degree of ageing of the catalyst, the brake specific NOx emission of a vehicle on road is calculated in real time, and an emission OBD monitoring and judging method is put forward.

Methods and systems for controlling the supply voltage provided to a power amplifier (PA) in a radio frequency (RF) transmitter based on measured output spectrum emissions are provided. In an embodiment, the PA supply voltage is adjusted such that spectrum emission limits are satisfied with predetermined margins. In another embodiment, the predetermined margins are reduced to lower power consumption of the PA.

The invention discloses a treatment method of printing ink wastewater generated in circuit board production. The treatment method comprises the following steps: firstly guiding printing ink raw wastewater generated in circuit board production into a raw water collecting tank, carrying out water quality equalization, then pumping into a reaction tank in the step two, coagulating so as to form muddy water mixed liquid of flocs, feeding the muddy water mixed liquid into a plate-and-frame filter press, carrying out solid-liquid separation, pumping filtrate into a Fenton oxidization/ultraviolet tank in the step four, carrying out oxidative degradation, electrolyzing, entering the electrolyzed wastewater to a membrane filtration device, and further carrying out biochemical treatment on the wastewater filtered by using a membrane. The treatment method can be used for effectively removing COD, ammonia nitrogen, total phosphorus and heavy metals in the printing ink wastewater generated in circuit board production, effectively preventing membrane pollution, continuously and effectively carrying out wastewater treatment and ensuring the final discharged water of the printing ink wastewater generated in circuit board production to meet the primary standards of Guangdong province water pollutant emission limits (DB44/26-2001).

The invention discloses a method and a device for deeply treating antibiotic pharmaceutical wastewater based on magnetic Fenton-like resin. The device comprises a coagulative precipitation tank, a Fenton-like reactor, an anaerobic baffle plate reactor, an aerobic biological contact oxidation tank, a sedimentation tank, a magnetic resin Fenton-like oxidation tank and a resin adsorption tower which are sequentially communicated by virtue of pipelines. By using the method and the device, the antibiotic pharmaceutical wastewater can be deeply treated; and effluent obtained after the antibiotic pharmaceutical wastewater is treated by using the method and the device disclosed by the invention can stably reach up to the emission limit regulated by Fermented Pharmaceutical Industrial Water Pollutant Emission Standard (GB21903-2008).

The invention discloses a styrene exhaust gas treatment method including the following steps: carrying out countercurrent contact of styrene exhaust gas with an alkaline solution of potassium permanganate, carrying out an oxidation reaction of styrene with the alkaline solution of potassium permanganate in the contact process, and after completion of the reaction, discharging the exhaust gas having styrene consumed into the atmosphere. With adopting of the technological process of spraying the potassium permanganate solution to absorb styrene, styrene-containing exhaust gas generated by refinery enterprise styrene materials and generated in highway car loading, wharf shipment, storage tank breathing and other various places can be treated at the same time, and the method has higher treatment efficiency, besides, is simple in flow, small in occupied land area and low in energy consumption, can meet the national latest environmental protection standard requirements for styrene emission limit values, effectively reduces the styrene emission and eliminates environmental risks and security risks at refinery enterprise styrene workplaces.

The invention discloses a radioactive wastewater treatment technology and the synthesis of a treatment agent of radioactive wastewater. A modified product Y3-8103 is used for chemically reacting with radioactive wastewater, all heavy metal elements and all radioactive elements, namely cesium137, uranium 235, thorium, plutonium, thallium, protium, deuterium, tritium, radon, Sr-90 and radium, listed in the periodic table of elements and wastewater generated by all artificial nuclides. Alpha radioactive rays, beta radioactive rays, gamma radioactive rays and neutron radioactive rays are attenuated in a nationally specified mode. The radioactive wastewater treatment technology and the synthesis of the treatment agent of the radioactive wastewater can also be used for treating radioactive seawater or waste residues generated by wastewater treatment and can be used for treating heavy metal wastewater discharged by a lead-acid battery enterprise and an electronic plant and mine nucleus waste residues. The treatment cost of the radioactive wastewater is different along with different radioactive element concentration contents or different waste residue radioactive element concentration contents and different atomic weights in the wastewater, and the treatment cost of the wastewater and the waste residues ranges from RMB 90 yuan/m<3> to RMB 680 yuan/m<3>, radioactive energy with the alpha, beta and gamma radioactive ray radiant quantity smaller than or equal to 0.01Bq/1-1.10Bq/1 can be discharged to the ambient environment by the wastewater and the waste residues, the emission limit standard allowed by the international is reached, and secondary pollution is avoided. The radioactive wastewater treatment technology and the synthesis of the treatment agent of the radioactive wastewater are suitable for treating wastewater and waste residues of a nuclear power plant and treating wastewater and waste residues in mining with the radioactive elements, and are also suitable for treating wastewater containing heavy metal, namely lead, cadmium, mercury, arsenic, chromium, nickel, copper and manganese.

The invention provides equipment for treating waste emulsion. The equipment is characterized by comprising a floating oil removal device, an oil-water separation device, and an electrochemical treatment device, wherein the floating oil removal device is used for removing floating oil from to-be-treated waste emulsion, and removing the floating oil floating on the level of the waste emulsion; the oil-water separation device is used for performing oil-water separation to the waste emulsion without floating oil, and removing the dispersion oil suspending in the waste emulsion; and the electrochemical treatment device is used for performing electrochemical treatment to the waste emulsion which is subjected to oil-water separation treatment, so that emulsifying oil and dissolved oil are flocculated, wherein an electrified aluminum plate and a nanoceramic membrane are used for performing electrochemical treatment; a disconnected nanoceramic membrane is used for performing ultrafiltration treatment to the stand and precipitated crude emulsion. After being treated through the equipment, the quality of effluent water is good, and the effluent water can completely meet the emission limit requirement of a public sewage treatment system in Beijing Integrated discharge standard of water pollutants DB11/307-2013.

The invention provides a Claus tail gas treatment system. The system comprises a hydrogenation unit, a fast cooling unit, a desulfurization unit, an optional hydrolysis unit and an optional liquid sulfur degassing gas supply unit. The invention further provides a Claus tail gas treatment method. According to the tail gas treatment system and treatment method provided by the invention, the sulfur removal rate can be greater than 99.99%; H2S concentration of exhaust gas emitted into the atmosphere is less than 10 ppm, and is, when converted into the SO2 concentration, less than 50 mg/m3; the removal rate and emission concentration can meet the current highest emission limit standard. Furthermore, the system and method have the advantages of: being environmentally-friendly, stable and reliable, less in investment and low in operating cost.

A method, computer-readable medium, and apparatus operate to reduce or eliminate interference with one or more other communication systems having specific transmission requirements within a specific geographic area. For example, aspects operate by determining that a user equipment (UE) is in a protection zone where additional transmission requirements apply. The additional transmission requirements enable coexistence with one or more other communication systems in the protection zone. The UE may identify, based on being in the protection zone and a coexistence mode, one or more transmit emission limit requirements to be met. The UE may identify, based on being in the protection zone and the coexistence mode, one or more maximum transmit power requirements to be met. The UE may configure a transmit output power, at which the UE can meet the one or more transmit emission limit requirements and the one or more maximum transmit power requirements.

The invention relates to a pretreatment method of heavy metal sludge. The specific method comprises the following steps: firstly, adjusting the pH of sewage sludge to be 7-9 with slaked lime, and treating with a heavy metal stabilization medicine; adding cement and a flocculating agent, and stirring; finally separating out a lot of water from which metals are removed by virtue of mud-water separation equipment; and naturally drying a mud cake for 1-2 days until the mud cake becomes hard, wherein the moisture content is lower than 40%, the mud cake can be directly subjected to landfill disposal, and the content of heavy metals in the separated sewage accords with the related emission limit in the 'integrated wastewater discharge standard'. Therefore, the method can be used as a pretreatment unit before landfill disposal of high-water sludge and heavy metal-containing sludge.

The invention discloses a continuous monitoring device for flue gas emissions and an automatic verification method for the validity of monitoring data. The device comprises a sampling device, a pretreatment device, an analysis device, a data acquisition device and a verification device, wherein the sampling device is connected with a flue, the pretreatment device is connected with the sampling device, the analysis device is connected with the pretreatment device, the data acquisition device and the verification device are connected with the analysis device, and a verification control device carries out automatic verification on the analysis device regularly and/or when the flue gas measured value monitored by the data acquisition device exceeds an emission limit value. According to the automatic verification method for the validity of monitoring data disclosed by the invention, through carrying out automatic verification on a gas analyzer regularly and/or when the flue gas measured value exceeds an emission limit value, and judging whether the instrument error of the gas analyzer is in an allowed range, valid data is identified, so that the technical problem that existing continuous monitoring devices for flue gas emissions can not evidence the accuracy of measurement data is solved, the evidencing to the accuracy of measurement data is realized, and the accuracy of data measuring of the continuous monitoring device for flue gas emissions is improved.

The invention relates to a three time-coated motorcycle catalyst and a preparation method thereof. A first noble metal coating is coated on the gas inlet end of a honeycomb carrier, a second noble metal coating is coated on the gas outlet end of the honeycomb carrier, and a third noble metal coating is coated on the outer surface of the second noble metal coating, wherein the first noble metal coating is composed of noble metal and alumina loading the noble metal, and the noble metal is one of Pd, Pt-Pd, Pd-Rh or Pt-Pd-Rh; the second noble metal coating comprises noble metal, noble metal-loaded alumina and an oxygen storage material, and the noble metal is one of Pd and Pt-Pd; and the third noble metal coating comprises noble metal Rh, noble metal-loaded alumina and an oxygen storage material, and the noble metal is Rh. The preparation method of the catalyst comprises the following steps: preparing the first noble metal coating, preparing the second noble metal coating, and preparing the third noble metal coating. Through the catalyst, the conversion efficiency of HC at the cold start stage is improved, and meanwhile the conversion rate of CO and NOx is taken into account, so thatthe Euro 5 emission limits of pollutants are met.