464results about "Emission prevention" patented technology

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%.

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.

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.

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.

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.

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.

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.

Disclosed herein are methods and systems for valuing carbon monoxide emissions from a metallurgical furnace to high-value low-carbon footprint chemicals using carbon monoxide electrolysis. The disclosed method comprises: operating a metallurgical furnace; obtaining a volume of carbon monoxide in relation to the operation of the metallurgical furnace; supplying the volume of carbon monoxide to a cathode region of a carbon monoxide electrolyser for use as a reduction substrate; and using the carbon monoxide electrolyser, the reducing substrate, and the oxidizing substrate to generate a volume of the generated chemical. The volume of the generated chemical is at least one of a volume of a hydrocarbon, a volume of an organic acid, a volume of an alcohol, a volume of an olefin, and a volume of an N-rich organic compound.

The invention relates to the technical field of waste gas treatment, in particular to a waste incineration flue gas dry denitration system which comprises a reaction cylinder, a center block, a guide assembly and a flow dividing assembly, the reaction cylinder is vertically arranged, the center block is arranged in the reaction cylinder, a plurality of flue gas cavities are formed between the reaction cylinder and the center block, and flue gas is introduced from the bottoms of the flue gas cavities; the multiple smoke cavities are arranged in the circumferential direction of the reaction cylinder, a chemical cavity is formed between every two adjacent smoke cavities, and a denitration agent is introduced from the bottoms of the chemical cavities; the guide assembly is arranged on the central block and is used for guiding a denitration agent in the chemical cavity and flue gas in the flue gas cavity to rotate and mix at different angles in the circumferential direction of the reaction cylinder, so that the flue gas and the denitration agent rotate and intersect in the rising process, and the flue gas and the denitration agent are more easily and fully mixed to react; and the shunting assembly is arranged in the reaction cylinder and is used for separating the flue gas and the denitration agent in the vertical direction, so that the subsequent reduction reaction is prevented from being influenced by sudden local temperature drop caused by instantaneous generation of a large amount of chemical reactions.

To provide a fusion furnace capable of efficiently recovering a useful metal capable of being recycled from an objected to be treated containing metal.SOLUTION: A fusion furnace comprises a furnace chamber that fuses an object to be treated containing useful metal, a slag hole that discharges fused slag generated in the fusion treatment, and a hearth that guides the fused slag to the slag hole. The hearth is provided with a retention mechanism that retains the fused metal contained in the fused slag. The retention mechanism is composed of a concave part formed in front of the slag hole in the flat hearth, and is configured to cause the fused metal to settle in the concave part.SELECTED DRAWING: Figure 2

Chemical plant for the treatment of H2S comprising: a first unit (A) for decontaminating a gaseous process / feed stream contaminated by H2S (A1) and obtaining a first gaseous waste stream (A2) containing the separated H2S and a gaseous decontaminated process / feed stream (A3), a second unit (B) for recovering elemental sulphur from H2S and obtaining a second liquid stream of elemental sulphur (B3) and a final gaseous stream containing H2O (B2), a third unit for recovering H2 from H2S, wherein said third unit sequentially comprises a second line (2) in fluid communication with the first line (1), which is detached from said first line (1), to convey at least in part said first gaseous waste stream (A2), a chemical reactor (R) for heating and decomposing at high temperature the H2S according to the endothermic reaction (I), resulting in a gaseous H2-enriched stream, at least one heat exchanger (E) to cool said H2-enriched stream and to condense the elemental sulphur, a first separator (S1) for separating said condensed elemental sulphur from said H2-enriched stream, forming a first liquid stream of elemental sulphur, a fifth line (5) for conveying said gaseous H2-enriched stream exiting said first separator (S1) a sixth line (6) for conveying said first liquid stream leaving said first separator (S1), and wherein said third unit forms a loop circuit with a portion of said first line (1) or with a portion of said first line (1) and said first unit (A).

The present invention relates to a liquid ammonia and coal-fired complementary power generation system and method, the system includes a main burner and a separate overburnt air burner arranged in a furnace, an economizer, an ammonia injection grid, an SCR denitration reactor and an air preheater are arranged in sequence in the tail flue connected to the furnace outlet flue, and an ammonia fuel burner is arranged in the main burner area; the ammonia injection grid is arranged on the inlet flue of the SCR denitration reactor; an SCR inlet flue gas sampling device is arranged on the flue between the economizer outlet and the ammonia injection grid; an SCR outlet flue gas sampling device is arranged on the flue between the SCR denitration reactor and the air preheater; the system also includes an ammonia supply device, which is respectively connected to the ammonia fuel burner and the ammonia injection grid. In the present invention, not all ammonia fuel is directly sprayed into the furnace, and this design method can improve the efficiency of the mixed combustion of ammonia fuel and coal powder, which is conducive to the ignition and stable combustion of ammonia fuel.

A flue gas treatment system including a (wet) acid scrubber arranged upstream a dry (or semidry) desulfurization process and corresponding method. The acid scrubber generates liquid chloride acid which may be used in associated processes, for example pH controlled leaching of flue gas waste (FLG).

Methods, apparatus, systems, and articles of manufacture are disclosed to measure fallout from a liquid flare burner. An example apparatus includes a device configurator to invoke a first control valve to isolate the liquid flare burner from a test fluid source, and invoke a second control valve to fluidly couple the liquid flare burner to a hydrocarbon source to generate unburned fallout droplets to be captured by first and second measurement surfaces in first and second measurement regions, a parameter calculator to calculate first and second fallout volumes associated with the unburned fallout droplets captured by the first and second measurement surfaces, and determine a fallout efficiency of the liquid flare burner based on the first and second fallout volumes, and a burner configurator to, in response to the fallout efficiency not satisfying a fallout efficiency threshold, adjust a configuration of the liquid flare burner based on the fallout efficiency.

A combustion method using a fuel combustion device, a cement manufacturing method, and a cement calcination facility including a fuel combustion device, in which while the amount of a fossil fuel used as a fuel supplied to a fuel combustion device provided in various facilities such as a cement calcination facility is reduced, the radiation heat transfer amounts of various burners are maintained, whereby the amount of heat transferred to a heating target such as a powder raw material of cement clinker is maintained to maintain a state suitable for calcination, the amount of carbon dioxide emitted from the various facilities is reduced, and the various facilities can be operated at a low cost, and a fuel combustion device including a fuel supply mechanism having a mechanism that supplies a flammable powder, a mechanism that supplies a fuel gas, and a mechanism that supplies a non-flammable powder are used.

A method for separating carbon dioxide from a flue gas stream in which an atmospheric open flue gas stack having a flue gas inlet and a flue gas outlet is connected via a first conduit and a second conduit between a first flue gas generating unit and a second unit configured to capture carbon dioxide. A boost device disposed within the first conduit is configured to draw flue gas from the first unit and maintain the pressure in the first unit constant. A flow measurement for determining an actual flue gas flow within the first conduit is effected within the first conduit upstream of the flue gas stack, and the pressure in the first unit is controlled using a control unit, where the actual flue gas flow within the first conduit is used as an input signal to the control unit.

The present application relates to gas water heater equipment technical field, more specifically, it relates to a kind of smoke guide device and the gas water heater of the device, including smoke collecting cover, smoke exhaust fan, flue gas treatment mechanism and flow guide heat exchange mechanism;The smoke collecting cover below is equipped with smoke collecting port, and flow guide heat exchange mechanism is connected in smoke collecting port;The smoke collecting cover top is equipped with smoke guide port, and the smoke guide port is connected with the smoke inlet of smoke exhaust fan, and the smoke outlet of smoke exhaust fan is connected with flue gas treatment mechanism.In the inside of smoke guide device, flow guide heat exchange mechanism for guiding and sending flue gas and carrying out heat exchange can improve the flue gas collection effect, while recycling the heat energy in flue gas, improve the energy utilization rate, and reduce the heat pollution generated by directly discharging flue gas;Flue gas treatment mechanism is also arranged in the inside of smoke guide device, carbon dioxide in flue gas can be filtered out by carbon dioxide filter in the inside of flue gas treatment mechanism, reduce the influence caused by discharging flue gas on atmospheric environment.

This disclosure provides an ammonia injection method and apparatus based on a denitrification system. The method includes: acquiring current boiler parameters of a coal-fired boiler; collecting nitrogen oxide (NOx) parameters at the denitrification inlet of the denitrification system as a first NOx parameter; collecting NOx parameters at the denitrification outlet of the denitrification system as a second NOx parameter; collecting NOx parameters at the total exhaust outlet of the denitrification system as a third NOx parameter; preprocessing the current boiler parameters, the first NOx parameter, the second NOx parameter, and the third NOx parameter respectively; determining the current required ammonia quantity for the denitrification system based on at least one of the preprocessed current boiler parameters, the first NOx parameter, the second NOx parameter, and the third NOx parameter; and injecting ammonia into the denitrification system according to the current required ammonia quantity. This method ensures that the calculated ammonia injection quantity is significantly more accurate.

Provided is a piping system for an auxiliary steam header of a boiler that can prevent operation failures due to leakage of the auxiliary steam header of the boiler. 【Solution means】The piping system for the auxiliary steam header of the boiler includes a soot blow steam connection port of the boiler body, an auxiliary steam header connection port of the boiler, a soot blower of the economizer, a manual steam inlet valve for auxiliary soot blow of the air preheater, an electric steam inlet valve for auxiliary soot blow of the air preheater, an auxiliary steam inlet valve for the soot blower of the air preheater, a denitration SCR auxiliary steam inlet valve, and a denitration SCR steam connection port. The connection part between the auxiliary steam inlet valve for the soot blower of the air preheater and the manual steam inlet valve for the auxiliary soot blower of the air preheater is connected to one end of the denitration SCR auxiliary steam inlet valve.

A system and method are provided for obtaining nitrogen and carbon dioxide gas from flue gas. A method according to some embodiments involves receiving flue gas at the inlet of a selective catalytic reduction system, wherein the flue gas is one or more NO x The system includes a gas and one or more NOs in a selective catalytic reduction system. x The method includes reducing a gas to N2 gas, receiving output gas from a selective catalytic reduction system at the inlet of a gas separation membrane, and separating the output gas into a retained substance and a permeate using the gas separation membrane, wherein the retained substance comprises N2 gas.

A system includes a gas capture system having an adsorber with a sorbent material, wherein the adsorber is configured to adsorb an undesirable gas from a gas flow into the sorbent material in an adsorption mode, and desorb the undesirable gas from the sorbent material in a desorption mode. The gas capture system further includes at least one heat pipe configured to transfer heat away from the sorbent material during the adsorption mode.

An apparatus and process for oxidant formation can be configured to facilitate improved mixing of for formation of an oxidant. Embodiments can be configured so conduits having a relatively large aspect ratio (e.g., 1.5 to 5 or 1.5 to over 5) can be utilized for improved gas mixing even in situations in which the carrier gas is at a relatively low pressure. Embodiments can also facilitate low nitrogen oxide formation combustion. Some embodiments can additionally provide improved carbon capture.