394results about "Emission prevention" patented technology

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 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.

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.

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).

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.

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.

A method for melting vitrifiable materials to produce flat glass, including: providing a furnace including: a melting tank, a fining tank, a neck, at least one inlet means located at the melting tank, an outlet means located downstream of the fining tank, and at least one extraction means of a flue gas located at the at least one upstream zone; charging the vitrifiable materials including raw materials and cullet in the melting tank with the at least one inlet means; cullet pre-heating; melting the vitrifiable materials in the melting tank; fining the melt in the fining tank; flowing the melt from the fining tank to a working zone through the outlet means; and capturing CO2 from the flue gas.

A gas conditioning system removes contaminants including nitrogen oxides and sulfur oxides from flue gas of a marine vessel, and includes an oxidizer unit and a direct contact cooler. The oxidizer unit receives an exhaust flue gas from a marine engine through a fluid inlet at a temperature between 150 degrees Celsius and 550 degrees Celsius, and converts at least a portion of the nitrogen oxides in the flue gas into nitrogen gas, nitrogen dioxide, or both. The direct contact cooler is fluidly connected to the oxidizer unit, and includes a housing defining a cooling chamber. The direct contact cooler directs the flue gas into contact with seawater residing in the cooling chamber and cools the flue gas to a temperature less than or equal to 60 degrees Celsius. The seawater removes some or all nitrogen dioxide and sulfur dioxide from the flue gas in the cooling chamber.

This application provides a denitrification control method and system for biomass boilers based on cryogenic catalytic reduction, relating to the field of combustion product treatment technology. The method includes: arranging a denitrification reactor in the tail flue of the biomass boiler and monitoring the associated data of the outlet flue gas in real time; performing multi-level control analysis on the boiler denitrification control space and establishing a multi-level denitrification control channel; monitoring the reaction temperature and dynamically identifying zones in the denitrification reactor to determine the cryogenic catalyst reaction zone set; using the multi-level denitrification control channel to perform dynamic strategy analysis on the associated data of the outlet flue gas and the cryogenic catalyst reaction zone set; monitoring the denitrification execution of the denitrification reactor based on the target boiler denitrification control parameters, and performing dynamic compensation control through flue gas denitrification feedback data. This application can solve the technical problem of unstable denitrification control efficiency in existing biomass boiler technologies, achieving the technical effect of improving the stability of denitrification control efficiency.

The invention relates to a chimney system (1) comprising a chimney furnace (2) to which a furnace pipe (5) is connected for discharging exhaust gases (8) from the chimney furnace (2), wherein an exhaust gas aftertreatment unit (9) is provided in the furnace pipe (5), and at least two axial zones (10, 11) are mounted in the exhaust gas aftertreatment unit (9), a first zone (10) having a catalytic function and a second zone (11) having a filtering function. Each of the at least two zones (10, 11) comprises a plurality of channels (16) with a channel density of at most 600 cpsi [cells per square inch].

The invention relates to the technical field of sludge treatment and resource recycling, and discloses a sludge semi-drying and leather solid waste blending combustion system and method.The sludge semi-drying and leather solid waste blending combustion system comprises a sludge pretreatment unit, a drying unit, a leather processing solid waste pretreatment unit, a blending combustion unit and a pollutant treatment unit; the drying unit is used for drying sludge, the leather processing solid waste pretreatment unit comprises a semi-dry leather solid waste pretreatment unit and a dry leather leftover material pretreatment unit, the leather leftover material mixing unit is connected with the broken leather and dried sludge mixing unit, and the pollutant treatment unit is used for purifying the blending combustion unit. The pollutant treatment unit comprises a particulate matter treatment unit and a desulfurization and denitrification unit which are communicated with each other. According to the invention, cooperative treatment of the sludge and the leather processing solid waste is realized, the energy utilization efficiency is improved, and the treatment cost and environmental pollution are reduced.

A system for capturing carbon subsequent to an industrial process can include a group of modules configured to be prefabricated remotely from an industrial site, transported to the industrial site, and interconnected together at the industrial site. Each module can include equipment configured to perform one or more subprocesses of a capturing carbon process. Examples of the one or more subprocesses can include a pre-scrubber subprocess, an absorbent reclaiming subprocess, an absorbent regeneration subprocess, a dehydration subprocess, a deoxygenation subprocess, or any combination thereof.

The invention belongs to the technical field of electrical digital data processing, and particularly relates to a circulating fluidized bed boiler nitrogen oxide control optimization operation method and system.The circulating fluidized bed boiler nitrogen oxide control optimization operation method comprises the steps that based on a particle swarm algorithm, particles are obtained to form a particle swarm; calculating the fitness of each particle according to the target function; obtaining a historical optimal cost vector and a population minimum cost vector; calculating a position vector and a velocity vector of the particles after iteration; according to the position vectors of the particles after iteration, obtaining operation parameters and costs of the corresponding circulating fluidized bed boiler and the denitration device, and setting the operation parameters; according to the method, the optimal operation parameters of the circulating fluidized bed boiler and the denitration device are automatically searched through the particle swarm optimization, meanwhile, the effect of boiler combustion and tail denitration coupling is fully considered in calculation, the coal consumption of the circulating fluidized bed boiler and the consumption of the denitration agent can be reduced under the requirements of given load and nitrogen oxide emission concentration, and the system reliability is improved. And the operation cost is lowest.

The invention relates to an apparatus for treating a gas stream containing undesired components, such as sulphur dioxide or mercury, the gas stream coming from a combustion unit (10) in which at least one mineral material can be calcined, and which apparatus in particular comprises a first injection device (162) connected to a second gas / particle separation device (140) such that at least part of the first particles injected into the gas stream by the first injection device (162) at least partly consists of a second particle stream coming from the second gas / particle separation device (140).

The invention discloses a molten salt heat storage and carbon capture synergistic coupling system and a control method, and belongs to the technical field of energy conservation and consumption reduction of coal-fired units. The system comprises a fused salt heat storage unit, a heat exchange module, a smoke exhaust pipeline, an amine liquid circulation carbon capture module and a control unit, the control unit is connected with the fused salt heat storage unit, the heat exchange module and the amine liquid circulation carbon capture module; the heat exchange module is integrated with a group of shell-and-tube heat exchangers, the shell side of each shell-and-tube heat exchanger is connected with the fused salt heat storage unit, and the tube side of each shell-and-tube heat exchanger is connected with the amine liquid circulation carbon capture module; the fused salt heat storage unit comprises a low-temperature fused salt tank, a first fused salt circulating pump, a waste heat boiler, a second fused salt circulating pump and a fused salt heat storage tank; a three-way valve is arranged at a fused salt inlet of the heat exchange module and used for controlling the flow direction of fused salt; a smoke inlet of the waste heat boiler is connected with a smoke exhaust pipeline, a fused salt inlet of the waste heat boiler is connected with an outlet of the low-temperature fused salt tank through a first fused salt circulating pump, and a fused salt outlet of the waste heat boiler is connected with an inlet of the fused salt heat storage tank and a three-way valve. An outlet of the fused salt heat storage tank is connected with a three-way valve through a second fused salt circulating pump; a fused salt outlet of the heat exchange module is connected with an inlet of the low-temperature fused salt tank. According to the fused salt heat storage and carbon capture collaborative coupling system and the control method, the framework is simplified, control is convenient and fast, and the feasibility is high.

OBJECT To provide a metal heating furnace that burns ammonia while decreasing nitrogen oxides efficiently and a method of burning ammonia in the metal heating furnace. MEANS OF REALIZING THE OBJECT A metal heating furnace 10 includes a burner nozzle 31, plural injection nozzles 41, 42, 43 for ammonia, and a controlling unit 100. The burner nozzle 31 is provided on a furnace wall 11 and emits flame F, which is used to burn ammonia. The injection nozzles 41, 42, 43 for ammonia are provided on a ceiling wall 13 at intervals in a direction in which the flame F extends, and are used to eject ammonia in a direction perpendicular to the flame F. The controlling unit 100 optimizes an amount of ammonia ejected from each of the injection nozzles 41, 42, 43 for ammonia.

The invention discloses a county waste incineration treatment system and an operation method thereof, and relates to the technical field of waste incineration treatment and flue gas harmless treatment.The county waste incineration treatment system comprises a waste pretreatment module and a waste incinerator, and the waste pretreatment module is used for receiving and pretreating waste of a county waste collection station; the garbage pretreatment module and the garbage incinerator are sequentially arranged in a communicating mode. The water curtain dust removal device comprises a flue gas inlet and a flue gas outlet, the flue gas inlet is communicated with the garbage incinerator, and the outlet end of the flue gas inlet is located below the water surface; a plurality of chambers are arranged between the flue gas inlet and the flue gas outlet, and spraying structures are arranged in the chambers; and the flue gas channels and the flow channels are communicated. Aiming at the characteristic of small treatment scale of a county waste incineration system, a water curtain dust removal device is utilized, so that a flue gas treatment system is simpler, the cost is reduced, the scale of the waste incineration system is reduced, the types and the use amount of consumables are reduced, and the waste incineration cost is reduced.