629results about "Emission prevention" patented technology

A method for removing acidic gases from a post combustion process stream, the method comprising the steps of: receiving the post combustion process stream into hollow fibers of at least one MBC cell, each hollow fiber gas permeable, liquid impermeable; passing a lean solvent in contact with an external surface of said hollow fibers; exchanging said acidic gas into the solvent through the hollow fiber; venting an acidic gas lean stream; exiting an acidic gas rich solvent.

Device for monitoring and controlling the high-temperature corrosion of water-cooled walls of a wall-like cut-circle boiler, characterized in that it comprises the following: a creation module for a meshed model, which serves to obtain a structure of the water-cooled wall of the wall-like circular boiler and to create a meshed model based on the structure of the water-cooled wall of the wall-like circular boiler; a creation module for a correlation model, which serves to obtain real-time parameters of the water-cooled wall of the wall-like circular vessel and to create a correlation model corresponding to the real-time parameters in combination with the networked model; a creation module for a three-dimensional model, which serves to simulate with the CFD data and the corresponding model in order to obtain the three-dimensional model of the temperature field and the CO field in the combustion chamber; a detection module for opening angles, which serves to obtain the deflection angles of various primary air nozzles and secondary air nozzles at different air volumes within the temperature field in the combustion chamber and the flap openings at different air volumes within the CO field on the basis of the three-dimensional models of the temperature field and the CO field of the combustion chamber; an adjustment module for deflection angles, which serves to obtain the optimal deflection angles of the primary air nozzles and the secondary air nozzles for the real-time air volume and the current temperature field in the combustion chamber based on the temperature and the real-time air volume at the appearance of the flame wall brushing in the boiler; an adjustment module for damper openings, which serves to obtain an optimal damper opening for the real-time air volume and the current CO field based on the CO concentration and the real-time air volume in the boiler.

System for determining the amount of sludge added to the boiler based on a coupled neural BP network, characterized in that it comprises the following: a creation module for the networked model of the combustion chamber, which serves to obtain a detailed structure of the denitrification system and the desulfurization system in the boiler, and to create a networked model of the combustion chamber based on the detailed structure of the denitrification system and the desulfurization system; a measurement module for the temperature field of the combustion chamber, which serves to create a relevant model for different coal qualities in the combustion chamber according to the networked model of the combustion chamber and in combination with the real-time data of the denitrification system and the desulfurization system, and to introduce CFD simulation values ​​into the relevant model and to simulate in order to obtain a temperature field of the combustion chamber; a denitrification efficiency acquisition module that serves to combine the detailed structure of the denitrification system with the temperature field of the combustion chamber and to obtain the denitrification efficiency and the NOx emission index within the framework of the 3D model; a measurement module for desulfurization efficiency, which serves to combine the detailed structure of the desulfurization system with the temperature field of the combustion chamber and to obtain the desulfurization efficiency and the SO2 emission index within the framework of the 3D model; a NOx dosing quantity module that serves to obtain the criterion for the minimum NOx emission value during boiler denitrification and the critical criterion for the NOx emission value with increasing sludge dosing quantity based on the denitrification efficiency and the NOx emission index within the framework of the 3D model, and to compare the different temperatures of the boiler chamber with the criterion of the minimum NOx emission value and the critical criterion of the NOx emission value with increasing sludge dosing quantity and to obtain the maximum regulated sludge dosing quantity corresponding to the NOx emission value; an SO2 dosing quantity module, which serves to obtain the criterion for the minimum SO2 emission value during the denitrification of the boiler and the critical criterion for the SO2 emission value with increasing sludge dosing quantity based on the desulfurization efficiency and the SO2 emission index within the framework of the 3D model, and to compare the different temperatures of the boiler chamber with the criterion of the minimum SO2 emission value and the critical criterion of the SO2 emission value with increasing sludge dosing quantity, and to obtain the maximum regulated sludge dosing quantity corresponding to the SO2 emission value; a model processing module that serves to train the maximum regulated sludge dosing quantity corresponding to the NOx emission value and the maximum regulated sludge dosing quantity corresponding to the SO2 emission value through a neural BP network and to obtain the maximum sludge dosing quantity of the boiler.

The invention relates to the technical field of flue gas denitration, in particular to a circulating fluidized bed boiler and a boiler system. The circulating fluidized bed boiler comprises a boiler body, a combustion chamber is arranged in the boiler body, a primary air inlet is formed in the bottom of the boiler body, and the combustion chamber comprises a dense-phase area; the air distribution plate is installed in the boiler body, the air distribution plate is located between the primary air inlet and the dense-phase area, and a plurality of air caps allowing airflow to flow into the combustion chamber from the primary air inlet are arranged on the air distribution plate at intervals; the urea spraying mechanism is mounted on the air distribution plate and vertically faces the central area of the dense-phase area; a spraying hole of the urea spraying mechanism is positioned above the air cap, so that a urea solution can be sprayed to the central area of the dense-phase area; the urea spraying mechanism is further arranged to allow airflow to flow into the combustion chamber from the primary air inlet. The circulating fluidized bed boiler can prevent the nitrogen oxide content of the generated flue gas from increasing when the circulating fluidized bed boiler is in a low-load state.

A method of capturing carbon dioxide, including providing a particle containing magnesium oxide, calcium oxide, or a combination thereof; and providing a mixture gas to contact the particle, wherein the mixture gas includes water vapor, carbon dioxide, and nitrogen oxide, and the particle captures the carbon dioxide to form a carbonated particle and a treated gas. The mixture gas has a relative humidity of 25% to 95%, a nitrogen oxide concentration of 20 ppm to 2000 ppm, and a carbon dioxide concentration of 0.05% to 15%.

The invention discloses a salt-containing waste gas and waste liquid incinerator system and a control method thereof.The system comprises a vertical incinerator, the vertical incinerator comprises a combustor and an incinerator body which are vertically arranged in sequence from top to bottom, and the combustor is connected with a waste liquid pipeline, a natural gas pipeline and a first waste gas pipeline; a secondary combustion-supporting air annular air bellow, a primary cooling air annular air bellow and a secondary cooling air annular air bellow are sequentially arranged on the furnace body part from top to bottom, and the upper area of the primary cooling air annular air bellow on the furnace body is an incineration area; the area between the upper area of the secondary cooling air annular air bellow on the furnace body and the primary cooling air annular air bellow is a primary cooling area; and the lower area of the secondary cooling air annular bellows on the furnace body is a secondary cooling area. According to the incinerator system, aiming at various waste gases and salt-containing waste liquids, the incineration system can be automatically controlled, molten salt blockage is avoided, nitrogen oxide emission during operation of the whole incineration system can reach 30 mg / Nm < 3 > or below, and energy conservation and environmental protection are achieved.

A method of capturing carbon dioxide, including providing a particle containing magnesium oxide, calcium oxide, or a combination thereof; and providing a mixture gas to contact the particle, wherein the mixture gas includes water vapor, carbon dioxide, and nitrogen oxide, and the particle captures the carbon dioxide to form a carbonated particle and a treated gas. The mixture gas has a relative humidity of 25% to 95%, a nitrogen oxide concentration of 20 ppm to 2000 ppm, and a carbon dioxide concentration of 0.05% to 15%.

The invention belongs to the field of fossil energy combustion and energy conservation and emission reduction, and relates to a fossil energy combustion pollutant resource utilization and zero emission system which comprises an air separation device, an oxygen-enriched combustion system, a dust removal device, a desulfurization device, a water treatment device and a CO2 recovery device. According to the scheme provided by the invention, inhalable particles and nitrogen oxides generated by fossil energy combustion can be greatly reduced, carbon dioxide and sulfides generated by fossil energy combustion are comprehensively recycled, and zero emission of combustion pollutants is realized.

Methods and systems for recuperating power from a pressurized fluid stream of a carbon capture system are disclosed. A compressor pressurizes the carbon dioxide containing feed fluid and passes this fluid stream through a carbon capture process. The pressurized stream is expanded across a turbine where power is recovered.

The present invention relates to the field of flue gas nitrogen oxide emission, and in particular to a method and a combustion system for reducing nitrogen oxide emission. Introducing non-nitrogen inert gas as a combustion diluent to establish ignition; when the amount of circulation flue gas reaches a designed value, the introduction of the non-nitrogen inert gaseous diluent is stopped; and by means of circulation of a part of flue gas and a part of CO2 in the flue gas, the internal circulation of the whole process system is ensured. The present invention achieves the objectives of reducing the nitrogen oxide emission and saving the fuel, thereby saving the energy, protecting the environment, fundamentally solving the emission problem of NOx in the flue gas, and achieving carbon reduction.

A method for combusting ammonia provided in a combustion feed (1) using a combustion arrangement (100) comprising a combustion section (110), a flue gas section (120), and a plurality of burners (111, 112) is provided, wherein the plurality of burners (111, 112) are operated using the combustion feed, and wherein a flue gas (2) formed in the combustion section (110) is passed through the flue gas section (120). A first group of the plurality of burners (111) are operated using first ratio of oxygen to ammonia and a second group of the plurality of burners (112) are operated with a second ratio of oxygen to ammonia lower than the first ratio of oxygen to ammonia. A corresponding combustion arrangement (100) is also provided.

A system (11) is provided, comprising: a furnace (102); a heat exchanger (104), a gas separator (106) and a first thermochemical reactor (112). The heat exchanger (104) is arranged to receive and cool a flue gas (121 ) comprising carbon dioxide and nitrogen from the furnace (102) thereby producing a cooled flue gas (122). The gas separator (106) is arranged to receive the cooled flue gas (122), and to separate the cooled flue gas (122) into a nitrogen rich gas (124) and a carbon dioxide rich gas (125). The heat exchanger (104) is arranged to heat the nitrogen rich gas (124) and the carbon dioxide rich gas (125). The first thermochemical reactor (112) comprises a thermochemical compound. The first thermochemical reactor (112) is configured to, in a first mode of the system (11), receive the heated carbon dioxide rich gas (126), and to produce carbon monoxide from carbon dioxide in the heated carbon dioxide rich gas (126) by oxidation of the thermochemical compound to form a carbon monoxide rich gas (125).

A power generation facility of the present disclosure generates power by incinerating materials to be incinerated, and comprises: an incinerator in which materials to be incinerated are incinerated; a boiler to which exhaust gas generated in the incinerator is supplied; a carbon dioxide recovery device into which the exhaust gas flows after passing through the boiler; an exhaust gas flow path provided between the boiler and the carbon dioxide recovery device; an adjustment device capable of regulating the flow rate of the exhaust gas flowing through the exhaust gas flow path to a target flow rate, and capable of regulating the temperature of the exhaust gas to a target temperature; a sensor provided to the power generation apparatus; and a control device that controls the adjustment device on the basis of detection results of the sensor.

The invention discloses an air preheater anti-blocking method for reducing NH3 escape and SO3 content, and relates to the field of air preheater anti-blocking. Comprising the steps of step-by-step soot blowing optimization, dynamic soot blowing parameter adjustment, ammonia escape precise control, coal type bin-divided blending, combustion parameter optimization control and wall temperature increase treatment. According to the invention, step-by-step soot blowing strengthens removal of ash on the surface of the catalyst and reduces the ammonia escape concentration through fixed-point retention and dynamic adjustment; the ammonia escape detection system monitors and adjusts the ammonia spraying amount in real time to ensure that the ammonia escape concentration is lower than 3 ppm, and generation of NH4HSO4 is reduced; the SO3 generation amount is reduced through coal type bin-dividing blending and combustion parameter optimization control, and the blocking risk is restrained from the source; in the wall temperature increasing treatment, the wall temperature is increased to 210 DEG C or above in a circulating air bin heating and single-side temperature increasing mode, and coagulated materials are promoted to be gasified and fall off. According to the method, the problem of blockage of the air preheater is effectively solved, and the operation efficiency and stability of a boiler system are improved.

The exhaust gas treatment system according to the present disclosure comprise: a dust collection installation including a denitration layer carrying a denitration catalyst, wherein exhaust gas passes through the dust collection installation; and a carbon dioxide collection device located downstream of the dust collection installation in the exhaust gas flowing direction. Exhaust gas is supplied from the dust collection installation to the carbon dioxide collection device in a condition such that the temperature of the exhaust gas is maintained to be equal to or less than the gas temperature at the outlet of the dust collection installation.

The invention discloses a device and method for denitrification by co-combustion of microwave-activated coke. The device includes a coal feeding hopper and a furnace. Coal is input onto a chain grate, and the coal cinder after combustion enters an ash hopper. The flue gas flows out through the outlet flue of the chain grate. The tail of the outlet flue of the chain grate is connected to the outlet flue of a dust collector, and a dust collector is arranged on the outlet flue of the dust collector. The tail of the outlet flue of the dust collector is respectively connected to a draft fan and a flue gas recirculation flue. Part of the flue gas flows out through the draft fan, and the other part of the flue gas enters the flue gas recirculation flue. A feeder on the flue gas recirculation flue inputs coke into the flue. The coke is mixed with the flue gas and then enters a microwave generator. The reacted coke is sprayed into the furnace through a coke spray gun. The ability of coke to reduce nitrogen oxides is improved by the microwave activation effect, and then the reacted coke is sprayed into the high-temperature and low-oxygen space in the furnace. While the coke is cyclically burned out, nitrogen oxides are also removed, and no secondary pollution to the environment will be caused.

The invention discloses a method for preventing blockage of a spraying system of a flue gas absorption tower. The method comprises the following steps: acquiring the desulfurization efficiency of the spraying system of the flue gas absorption tower; when the desulfurization efficiency reduction amount is not smaller than a first preset value and smaller than a second preset value and lasts for a first preset duration, first actions of preset times are executed, and the first actions are used for online cleaning of nozzle blockage; s10, after executing the first action for preset times, detecting the increase rate of the concentration of sulfur dioxide at the outlet of the spraying system of the flue gas absorption tower within a second preset duration, and if the increase rate is not greater than the first preset increase rate, returning to the step S10; when the desulfurization efficiency reduction amount is not lower than a second preset value and lower than a third preset value and lasts for a third preset duration, determining that the nozzle blockage foreign matter is a high-grade crystallized foreign matter; and when the desulfurization efficiency reduction amount is not lower than a third preset value and lasts for a fourth preset duration, a shutdown maintenance warning is given out, by means of the method, on one hand, the blockage of the nozzle can be determined in time, on the other hand, frequent shutdown caused by blockage can be reduced, and then the longest operation duration of a unit is guaranteed.

A CO2 capture process comprising: -Hydrating quicklime materials (16) and / or quick dolomitic lime materials (16') to produce hydrated materials (17); - Transferring at least a portion of the heat generated during the hydration to at least one energy distribution unit (20); - Controlling at least one secondary working medium flow (52.1, 52.2, 52.3) and / or at least one secondary electric power flow (62) between at least one energy distribution unit (20) and at least one energy utilization unit (30.1, 30.2, 30.3, 30.4); -Capturing at least some CO2 from at least one stream containing CO2 (71, 71*) to reduce the CO2 content in said stream, in at least one CO2 treatment unit (35.1, 35.2, 35.3).

The invention relates to an expansion type boiler waste heat recovery system, and relates to the technical field of boiler waste heat recovery, the expansion type boiler waste heat recovery system comprises a multi-stage dust removal module, a flue gas desulfurization module, a heat exchanger module and a waste heat recovery assembly, the multi-stage dust removal module comprises an inner stainless steel pipe, and one end of the inner stainless steel pipe is fixedly connected with a flue gas inlet pipe through a flange. By arranging the inner stainless steel pipe, the outer stainless steel pipe and the aerogel layer between the inner stainless steel pipe and the outer stainless steel pipe and cooperating with the heat preservation layer in the fine filtering box, a multi-layer heat preservation structure is formed, heat loss of flue gas in the dust removal process is effectively reduced, and the flue gas temperature is guaranteed; meanwhile, a ceramic fiber layer in the Venturi pipeline and a heat preservation cotton layer on the inner side of the stainless steel sleeve can further isolate heat, it is ensured that flue gas is kept at a high temperature in the dust removal, desulfurization and heat exchange processes, good conditions are created for follow-up waste heat recovery, the waste heat recovery efficiency is improved, and the situation that the follow-up technological process is affected due to the too low temperature is avoided; and the equipment operation cost and energy consumption are reduced.

An apparatus and process can be configured for reduced nitrogen oxide formation during combustion. Embodiments can provide synthetic air to a combustion device so that combustion of a fuel can occur with a substantially low amount of NOx. Some embodiments can provide a reduction in NOx formation by at least 75% and as much as greater than 95% as compared to use of ambient air or oxygen enriched air oxidants. Embodiments can also provide a flue gas that has a high concentration of carbon dioxide that can facilitate improved carbon capture and permit efficient formation of at least one carbon dioxide product stream with a high carbon dioxide concentration (e.g. at least 95 mole percent carbon dioxide).

The invention concerns a method of capturing and sequestering carbon dioxide (CO2) contained in a gaseous environment by means of a carbonatable mineral foam, the method comprising exposing a slurry of foamed cement or a set slurry of foamed cement to a gaseous environment containing carbon dioxide in an amount higher than 500 ppm, the slurry of foamed cement comprising water and a cement.

A reformation device for reforming exhaust emissions can be in fluid communication with an exhaust for exhaust emissions from combustion of fuel. The reformation device can be configured to direct exhaust emissions from the exhaust through at least one of a reformation chamber, a bed reactor, and a plasma reformer. The reformation chamber can include a chamber screen comprising copper material for reforming carbon dioxide in the exhaust emissions into copper carbonate. The bed reactor can include a catalyst for reforming carbon dioxide in the exhaust emissions into methanol. The plasma reformer can reform carbon dioxide in the exhaust emissions into methanol. The reformation device can include a fluid solution that reacts with the exhaust emissions.

The invention belongs to the technical field of waste gas treatment equipment, and particularly relates to kiln tail gas treatment equipment for ceramic pigment processing, the kiln tail gas treatment equipment comprises a spray tower, a spray pipe is arranged in the spray tower, a gas guide assembly is arranged at the bottom of the spray pipe, and the gas guide assembly comprises a gas guide pipe, two exhaust plates, two arc-shaped plates and a leakage-proof sleeve; the two exhaust plates are symmetrically distributed on the front side and the rear side of the air guide pipe, and exhaust holes are evenly formed in the tops of the exhaust plates. According to the tail gas spraying device, by arranging the adjusting assemblies, in the process of spraying tail gas through an alkaline solution, the adjusting assembly opposite to the gas inlet pipe can drive the adjusting assembly opposite to the liquid inlet pipe through the connecting assembly to conduct adjustment along with the change of the tail gas introduction amount, and therefore the spraying amount of the alkaline solution is controlled; the alkaline solution can be synchronously changed according to the change of the tail gas introduction amount, so that the waste of excessive alkaline solution is avoided.

Processes and apparatuses for heating process fluid in a furnace. Fuel to the furnace is either hydrocarbons or hydrogen. The fuels may be sent to different furnaces or be sent at different times to the same furnace. Furnaces that are configured to receive both types of fuels may have different exhaust paths. An exhaust path for hydrocarbon fuel flue gas includes a carbon capture process zone.

Methods and apparatus for improved efficiency and flue gas scrubbing in a fired heater using a condensing convection section. The method preheats a hydrocarbon or hydrocarbon / water process feed stream in a coil in the convection section of a fired heater, collects condensate from the flue gas, and scrubs the flue gas with the recirculated condensate. The apparatus has a heat transfer coil disposed in the convection section, to preheat a process stream and form condensate from the flue gas, and a condensate recirculation loop to collect the condensate from the convection section and scrub the flue gas with the condensate.

The invention belongs to the technical field of flue gas pollutant treatment, and particularly discloses a denitration improvement method and equipment based on ozonation, and the method comprises the following steps: delimiting an ozone reaction channel on a waste gas treatment pipeline to be transformed; defining a plurality of feeding points on the ozone reaction channel; starting the boiler to introduce flue gas into the waste gas treatment pipeline, and starting the ozone conveying device to introduce ozone into the waste gas treatment pipeline; adjusting the communication state of the feeding point and the ozone conveying device, and monitoring the amount of nitrogen oxide in the waste gas treatment pipeline and the amount of correspondingly introduced ozone in each communication state; constructing a proportional function according to the nitrogen oxide amount and the ozone amount; controlling a waste gas treatment pipeline to treat the current flue gas generated by the boiler through a proportional function; the system and the method have the following advantages: through a multi-point ozone dynamic addition and SCR flexible cooperation mechanism, integrated efficient control of denitration, deodorization and demercuration under the condition of low-temperature and high-humidity waste incineration flue gas is realized, the treatment efficiency is remarkably improved, and the energy consumption and the operation and maintenance cost are reduced.

The invention relates to a multi-energy combined ventilation air methane utilization method, and belongs to the technical field of methane treatment. In order to solve the problems that ventilation air methane with the concentration lower than 0.3% cannot be oxidized in a self-sustaining mode and a traditional technology depends on external fuel, a solar energy, wind energy and geothermal energy collaborative power supply system is adopted, and heat balance of a heat storage oxidation device is maintained in combination with an electric heating power dynamic adjustment formula. Through gradient utilization of flue gas waste heat and catalytic purification treatment, stable destruction of ventilation air methane with the concentration of 0.1% is achieved, the energy consumption of the system is reduced by 60% or above, the emission of CO is lower than 3.2 ppm, and the emission of NOx is lower than 15 mg / Nm < 3 >. The method breaks through the bottleneck of low-concentration gas treatment, is suitable for mining areas at the altitude of 4500 m or below, has the energy self-sufficiency rate of 95% or above, and is free of secondary pollution.

A composite material is used for desulfurization. The composite material contains activated carbon, alkali metal oxides, silicon oxides, iron oxides, and rare earth element oxides. The weight ratio among the activated carbon, iron oxides and rare earth element oxides is 100:(0.5-5):(1-10). The composite material, used as a sulfur adsorbent, has a higher sulfur breakthrough capacity and desulfurization rate.

The application discloses an integrated desulfurization and decarbonization particle separation external circulation spouting fluidized bed and a running method thereof, and belongs to the technical field of flue gas desulfurization and decarbonization. The fluidized bed is provided with a gas inlet at the bottom, a micro cyclone separator is arranged in the fluidized bed, a spouting bed gas inlet is communicated with a fluidized bed exhaust port, a micro cyclone separator exhaust port is communicated with the fluidized bed exhaust port, and the bottom of the micro cyclone separator is communicated with the outside. A calcium oxide feeding port is arranged at the lower end of the spouting bed, the top of the spouting bed is communicated with a cyclone separator gas inlet, a cyclone separator exhaust port is communicated with a calcining furnace inlet, and the calcining furnace is provided with a carbon dioxide discharge pipe. The intermittent fluidized bed is provided with a calcium hydroxide slurry inlet at the top, the calcium oxide feeding port is provided with a sealing cover, the calcining furnace outlet is communicated with a calcium oxide powder discharge pipe or a material guide pipe inlet, and the material guide pipe outlet is communicated with the lower end of the spouting bed. The continuous fluidized bed is provided with a liquid inlet at the top, the calcium oxide feeding port is an opening, the calcining furnace outlet is communicated with the material guide pipe inlet, and the material guide pipe outlet is communicated with the fluidized bed.

A gas conditioning system removes contaminants including carbon dioxide from flue gas, such as flue gas of a marine vessel, and includes a rotating backed bed assembly. The rotating packed bed assembly fluidly connects to an exhaust port of an engine, and receive a flue gas from the exhaust port. The rotating packed bed assembly includes a first rotating packed bed having an absorption agent to absorb a portion of the carbon dioxide from the flue gas, and a second rotating packed bed to receive the absorption agent from the first rotating packed bed and desorb at least some of the portion of the carbon dioxide from the absorption agent.