91 results about "Thermal oxidizer" patented technology

A regenerative thermal oxidizer assembly includes a first housing member and a second housing member. The first housing member defines a regenerative portion and a combustion chamber. The second housing member defines an inlet chamber and an outlet chamber. A regenerator is disposed within the regenerative portion of the first housing member. A thermal element extends through the first housing member into the combustion chamber for providing heat to the combustion chamber for initiating combustion inside the combustion chamber. The first housing member is rotatable around a central axis relative to the second housing member for rotating the regenerator relative to the inlet chamber and the outlet chamber.

A gas flow control valve with pivotable damper blade usable in a regenerative thermal oxidizer (RTO) unit or other gas flow control application. The valve in one embodiment is a four-way valve with dual operating positions to control gas flow through four ducts coupled to the valve. To enhance positively sealing the blade to the valve housing in each position the seal, selectively actuatable electromagnetic clamps are provided which magnetically draw the blade toward the active blade end seat acted upon by gas pressure in a direction which tends to force the blade away from its seat. The blade is actuated directly by an actuator system via an operating rod to change position of the valve. A seal air system supplies pressurized air to the valve seats. A programmable controller automatically controls actuation of the electromagnets, seal air, and blade positional changes.

Provided herein are methods and systems for treating a sulfur dioxide-containing gaseous stream. The method includes combusting a tail gas in an excess of oxygen gas to yield a thermal oxidizer effluent containing sulfur dioxide and oxygen. The thermal oxidizer effluent is introduced to an oxidative catalytic converter to convert sulfur dioxide to sulfur trioxide, thereby forming an oxidized gas stream. The oxidized gas stream is routed to a quench tower and contacted with a dilute aqueous acid quench stream to yield sulfurous acid, hydrated sulfur dioxide, or both. The sulfurous acid or hydrated sulfur dioxide is oxidized with the excess of oxygen from the thermal oxidizer effluent to yield sulfuric acid.

Processes and apparatuses converting poly- and perfluoroalkyl substances (PFAS). An oxidation reaction zone, preferably a thermal oxidizer, is utilized to oxidize the PFAS into anionic fluoride species. A treatment zone is utilized on at least a portion of the oxidation zone effluent before the oxidation zone effluent is vented or otherwise released to the atmosphere. The treatment zone may include a dry sorbent injection zone; a selective catalytic reduction zone, a wet scrubber zone; a carbon bed; an ion exchange zone; or any combination thereof.

A regenerative thermal oxidizer assembly includes a first housing member and a second housing member. The first housing member defines a regenerative portion and a combustion chamber. The second housing member defines an inlet chamber and an outlet chamber. A regenerator is disposed within the regenerative portion of the first housing member and defines a central axial opening extending to the combustion chamber. A thermal element extends through the axial opening to the combustion chamber for providing heat to the combustion chamber for initiating combustion inside the combustion chamber. The first housing member is rotatable around an axis defined by the axial opening relative to the second housing member for rotating the regenerator relative to the inlet chamber and the outlet chamber.

A regenerative thermal oxidizer (RTOx) can destroy fluorinated compounds in a feed gas. The RTOx includes a combustion chamber, a burner, and a heat recovery packing bed. The burner is coupled to the combustion chamber. The burner is configured to receive the feed gas, a fuel gas, and an oxidizing gas. The fuel gas includes methane. The oxidizing gas includes oxygen. The burner is configured to combust the feed gas and the fuel gas in the presence of the oxidizing gas to produce heat an exhaust gas that includes a fluoride-containing byproduct. The heat recovery packing bed is disposed within the combustion chamber. The heat recovery packing bed is made of a ceramic material that includes aluminum oxide that is configured to absorb at least a portion of the heat produced by the combustion of the feed gas and the fuel gas.

Herein disclosed are apparatus and associated methods related to producing an enhanced surface area biochar product with a desired activation level based on receiving biochar into a processing vessel configured with multiple independently temperature-controlled chambers and counter-flow steam injection, controlling activation levels of the biochar by moving the biochar through the processing vessel and adjusting the temperature of the biochar by injecting steam into at least one temperature-controlled chamber of the processing vessel, recovering volatiles driven off through dehydration using a thermal oxidizer, cooling the biochar to a desired discharge temperature using steam and retention time, and discharging the activated biochar product. The processing vessel may be a calciner, a rotary calciner, or a kiln. Biochar may be heated or cooled to a desired thermochemical processing temperature depending on the temperature of the received biochar. Counter-flow saturated steam may sweep volatile gases to a thermal oxidizer using a vacuum system.

The utility model discloses a filtering device for an RTO (regenerative thermal oxidizer), which comprises a tank body and a tank cover, an air inlet pipe and a discharge pipe are arranged on the tank body, a water inlet pipe is arranged on the tank cover, the filtering device further comprises a spraying assembly and a filtering assembly, and the spraying assembly is detachably mounted on the tank cover and communicated with the water inlet pipe; the filtering assembly comprises a scraping plate and a filtering net plate, the scraping plate is detachably mounted in the tank body, and the filtering net plate is rotatably mounted in the tank body through the driving assembly. According to the utility model, particulate matters in waste gas can be filtered through the filter screen plate, so that the particulate matters are prevented from entering the RTO heat accumulating type oxidizing furnace to cause blockage of a heat accumulator, the probability of damage failure of the RTO heat accumulating type oxidizing furnace is reduced, frequent maintenance by workers is not needed, and the waste gas treatment efficiency is improved; and the filter screen plate can be automatically cleaned through the scraping plate and the spraying assembly, the labor intensity of workers is relieved, the cleaning efficiency of the filter screen plate is improved, and the filtering effect of the filter screen plate is guaranteed.

This invention belongs to the technical field of RTO (Regenerative Thermal Oxidizer) furnaces, specifically an RTO lower chamber structure, including a support frame. An upper chamber is positioned above the support frame, and three lower chamber shells are fixedly connected to the upper chamber. Each lower chamber shell is made of fiberglass. Each lower chamber shell contains a purging component and a cooling / cleaning component. Two sets of vents are located at each end of each lower chamber shell. Connecting pipes are fixedly connected between adjacent lower chamber shells. A partition is fixedly connected above the vents in each lower chamber shell, dividing the interior of each lower chamber shell into an upper chamber and a lower chamber. A push valve component for switching the airflow conduction state is symmetrically distributed within each lower chamber shell. The use of fiberglass effectively resists corrosion in the lower chamber, while the cooling / cleaning component effectively prevents heat deformation of the lower chamber and removes organic acids from the lower chamber.

A coke dry quenching plant (10) and a method for coke dry quenching and off-gas treating, wherein the coke dry quenching plant (10) comprises: a cooling chamber (12) for cooling hot coke down to a predefined temperature; an off-gas conduct (15) for conducting the gas from an off-gas outlet (14) of the cooling chamber (12) to a heat recovery apparatus (18); a first dedusting unit (16) for dedusting the gas, wherein the first dedusting unit (16) is arranged in the off-gas conduct (15) downstream of the cooling chamber (12) and upstream of the heat recovery apparatus (18); the heat recovery apparatus (18) being configured to cool the gas down to a predefined first temperature range; a first fan unit (20) arranged downstream of the heat recovery apparatus; wherein the coke dry quenching plant further comprises a sub- economizer unit (24) arranged downstream of the first fan unit (20) and connected to the cooling chamber (12) via a process cooling gas conduct (26) and wherein the sub- economizer unit (24) is connected to a regenerative thermal oxidizer (40) via an excess gas conduct (30); wherein the sub-economizer unit (24) and / or the process cooling gas conduct and / or the excess gas conduct is / are configured to distribute or split the gas into the process cooling gas conduct (26) and / or the excess gas conduct (30); and feeding gas exiting the regenerative thermal oxidizer (40) as a recirculation gas through a recirculation conduct (46) into the off-gas conduct (15).

The invention discloses an efficient and low-consumption lithium battery waste gas intelligent treatment method and device, and belongs to the technical field of waste gas treatment.The method comprises the steps that pretreated waste gas is obtained through filtering of a metal filter cartridge and guided into a heat storage type thermal oxidizer, oxygenolysis is conducted in a combustion chamber, and high-temperature purified waste gas is generated; the outlet temperature data of the heat accumulating type thermal oxidizer and the circulating liquid state data of the alkaline washing tower are collected and fused into comprehensive state data; generating a quenching control instruction and an alkali washing control instruction by combining the real-time operation parameters of the quenching treatment and the alkali washing treatment; performing dry quenching treatment on the high-temperature purified waste gas according to the quenching control instruction to generate outlet dry cooling waste gas; performing alkali liquor washing on the dry-type cooling waste gas according to the alkali washing control instruction to generate standard waste gas, and discharging the standard waste gas. According to the method, an intelligent control strategy fusing upstream thermal oxidation outlet and downstream alkali washing state data is adopted, and collaborative optimization of the whole waste gas treatment process can be realized, so that the purification efficiency is improved, and the operation consumption is reduced.

The present disclosure relates to a method of using flue gas heat resulting from a combustion reaction, comprising: a) providing a fuel and an oxidant; b) preheating the fuel and the oxidant to produce a preheated fuel and a preheated oxidant; c) feeding the preheated fuel and preheated oxidant to a combustion chamber; d) heating raw materials via the combustion reaction of the preheated fuel with the preheated oxidant in the combustion chamber and generating flue gas; e) transferring at least part of the heat of the flue gas exiting the combustion chamber to an intermediate fluid, thereby producing a heated intermediate fluid; f) heating a Solid Oxide Electrolyzer Cells (SOEC) unit to a SOEC operating temperature, g) exchanging heat using at least part of the heat of the heated intermediate fluid, h) providing a steam stream at a steam stream temperature and an oxygen-containing carrier gas at an oxygen-containing carrier gas temperature, and feeding the steam stream and the oxygen-containing carrier gas to the SOEC unit to produce an oxygen-containing stream and a hydrogen-containing stream; wherein exchanging heat comprises 1. preheating the fuel to produce the preheated fuel to be fed to the combustion chamber and / or 2. preheating the oxidant to produce the preheated oxidant to be fed to the combustion chamber. The present disclosure also relates to a system of using flue gas heat from a combustion reaction.

A method for removing noxious, hazardous, toxic, mutagenic, and / or carcinogenic compounds and / or precursor compounds from a comingled gas, liquid, and / or solid stream is described. In one embodiment, the method is used to prepare the stream for feeding to an oxidizer, such as a thermal oxidizer, to reduce the amount of particulate matter discharged by the oxidizer and includes passing the stream through an ambient or chilled temperature condenser followed by an optional gas / solid separator, and one or more gas scrubbers prior to feeding to the oxidizer.

A thermal oxidizer employing an oxidation mixer, an oxidation chamber, a retention chamber and a heat dissipater forming a fluid flow path for thermal oxidation of a waste gas. In operation, the oxidation mixer facilitates a combustible mixture of the waste gas and an oxidant into an combustible waste gas stream, the oxidation chamber facilitates a primary combustion reaction of the combustible waste gas stream into an oxygenated waste gas stream, the retention chamber facilitates a secondary combustion reaction of the oxygenated waste gas stream into oxidized gases and the heat dissipator reduces the temperature of the flow of oxidized gases within the heat dissipator, which is communicated to a greenhouse gas processor that extracts greenhouse gas(es) from the vaporized oxidized gases. The greenhouse gas processor may condensate the greenhouse gas(es), acid neutralize the condensation of the greenhouse gas(es), and capture the acid neutralization of the condensation of the greenhouse gas(es).

Extreme-temperature valves that can be used in the production of activated carbon. An exemplary system includes a kiln reactor having an exhaust port, a thermal oxidizer having an input port, and a valve. The kiln reactor outputs exhaust gasses through the exhaust port. The thermal oxidizer includes an input port. The valve is connected between the exhaust port and the input port. The valve includes packing material that is at least partially thermally isolated from the exhaust gasses.

A method includes combusting a fuel with oxidizer gas to heat a fired radiant section, forming a flue gas, forming a process gas, and passing the process gas through the fired radiant section, forming a cracked gas. The flue gas is cooled in a flue gas heat recovery section. The cracked gas is cooled in a cracked gas heat recovery section. The recovery sections each comprise a multistream heat exchanger. The flue gas heat recovery section includes heat exchange structures which a use more than 35% of a total amount of heat recovered within the heat exchanger of the flue gas heat recovery section for preheating the oxidizer gas. The cracked gas heat recovery section uses more than 35% of a total amount of heat recovered within the heat exchanger of the cracked gas heat recovery section for preheating the process gas, the hydrocarbon feed, and / or the process steam.

The present disclosure relates to a regenerative thermal oxidizer comprising at least a first transfer chamber and at least a second transfer chamber, wherein the first transfer chamber comprises a first bed and the second transfer chamber comprises a second bed; at least one reaction chamber in fluid flow communication with the first transfer chamber and with the second transfer chamber, wherein waste gas is introducible into the regenerative thermal oxidizer to flow through the first bed to the reaction chamber or to flow through the second bed to the reaction chamber; and one or more first oxygen-containing gas inlet for introducing oxygen-containing gas into the regenerative thermal oxidizer positioned between at least a portion of the first bed and at least a portion of the reaction chamber or positioned between at least a portion of the second bed and at least a portion of the reaction chamber.

Provided herein are methods and systems for treating a sulfur dioxide-containing gaseous stream. The method includes combusting a tail gas in an excess of oxygen gas to yield a thermal oxidizer effluent containing sulfur dioxide and oxygen. The thermal oxidizer effluent is introduced to an oxidative catalytic converter to convert sulfur dioxide to sulfur trioxide, thereby forming an oxidized gas stream. The oxidized gas stream is routed to a quench tower and contacted with a dilute aqueous acid quench stream to yield sulfurous acid, hydrated sulfur dioxide, or both. The sulfurous acid or hydrated sulfur dioxide is oxidized with the excess of oxygen from the thermal oxidizer effluent to yield sulfuric acid.

The invention discloses an RTO heat storage type incinerator which comprises an air inlet pipe, a first induced draft fan installed at the air inlet pipe, an air outlet pipe, a first reverse blowing pipe with one end connected with the air outlet pipe, a heat exchange pipe connected with the first reverse blowing pipe, a second reverse blowing pipe connected with the heat exchange pipe, three heat storage chambers with ventilation openings, a combustion chamber and a combustor. According to the heat storage type incinerator, reverse blowing of high-temperature gas can be achieved, regional reverse blowing is achieved, so that organic sediments (carbon black and tar) and part of loose inorganic salt can be effectively treated, and heat storage ceramics can be better cleaned. After high-temperature back flushing, part of substances can be decomposed, oxidized or fall off, finally fall off in the form of dust, can be received by the dust receiving box and can be sucked away by negative pressure, so that whether the whole heat storage incineration device works normally or not can be judged according to the amount of dust received by the dust receiving box, and the back flushing effect can be monitored regularly.

Systems for thermally oxidizing contaminants in air streams comprise mixing vessels; one or more regenerative thermal oxidizers (RTOs), each comprising a combustion chamber for thermally oxidizing contaminants to yield an exhaust gas stream; exhaust gas lines for conveying portions of exhaust gas streams to mixing vessels to raise the dry bulb temperature of air streams to reduce condensation; vents for venting remaining portions of exhaust gas streams; diverters for dividing exhaust gas streams; and controllers to determine the amounts to divide exhaust gas streams to raise the dry bulb temperature. Monolithic poppet valve assemblies comprising two or more poppet valves, which can be incorporated into the systems, among other applications. Methods for reducing condensation, e.g., using the systems.

The invention discloses an underground negative pressure pipe ditch system for a textile workshop, which comprises an underground pipe ditch network, a negative pressure generation unit communicated with the underground pipe ditch network, a suction point device arranged at dust generation equipment and a dust separation and collection system, and a source thermal oxidation fire prevention subsystem is arranged outside the underground pipe ditch network. The source thermal oxidation fire prevention subsystem comprises a heat storage type thermal oxidizer and a front heat exchanger arranged in a pipeline between the underground pipe ditch network and the negative pressure generation unit, an outlet of the negative pressure generation unit is connected with a gas inlet of the heat storage type thermal oxidizer, and the front heat exchanger is used for preheating sucked gas containing fiber dust. According to the invention, dust-containing gas is preheated to 300-400 DEG C through the front heat exchanger, so that fibers are carbonized and converted into inert carbon powder, residual combustible materials are further thoroughly oxidized into COO and HO through the heat accumulating type thermal oxidizer, and three explosion elements, namely combustible materials, a fire source and oxygen, are eliminated from the source.

The utility model discloses a purging and purifying device for RTO (regenerative thermal oxidizer), which comprises a central shaft, the central shaft is of a hollow shaft structure, one end of the central shaft is provided with a rotary valve rotor synchronously rotating with the central shaft, a rotary valve stator is mounted outside the rotary valve rotor, and the side wall of the rotary valve rotor is provided with a plurality of first rotor ventilation openings and a plurality of second rotor ventilation openings. A plurality of stator ventilation openings are formed in the side wall of the rotary valve stator, a first blowing opening is formed in the upper half portion of the center shaft, first partition plates are arranged on the two sides of the first blowing opening, the lower half portion of the center shaft penetrates through the blowing air inlet cavity, and a second blowing opening is formed in the portion, penetrating through the blowing air inlet cavity, of the center shaft. The rotary valve achieves the valve purging function and has the advantages of being low in leakage rate, simple in structure, long in service life of a sealing piece, low in cost and convenient to maintain.

A gas flow control valve with pivotable damper blade usable in a regenerative thermal oxidizer (RTO) unit or other gas flow control application. The valve in one embodiment is a four-way valve with dual operating positions to control gas flow through four ducts coupled to the valve. To enhance positively sealing the blade to the valve housing in each position the seal, selectively actuatable electromagnetic clamps are provided which magnetically draw the blade toward the active blade end seat acted upon by gas pressure in a direction which tends to force the blade away from its seat. The blade is actuated directly by an actuator system via an operating rod to change position of the valve. A seal air system supplies pressurized air to the valve seats. A programmable controller automatically controls actuation of the electromagnets, seal air, and blade positional changes.

The utility model relates to an efficient waste gas preheating device for an RTO (Regenerative Thermal Oxidation) furnace, which comprises a rack, heat storage exchangers fixed at the upper end of the rack, an inspection support fixed between the heat storage exchangers, and circulating pipes fixed on the side surfaces of the heat storage exchangers. Heat of the heat accumulator can be utilized more efficiently to heat waste gas, the energy utilization rate is increased, heat release and heat accumulation of the heat accumulator are conducted at the same time, natural loss of the heat is reduced, the purpose of reheating the waste gas through the heat generated after waste gas combustion can be achieved, and efficient utilization of energy is ensured.

The utility model discloses a regenerative thermal oxidizer (RTO) incinerator heat accumulator dust blowing device, and relates to the technical field of RTO incinerators. The inner cavity of the furnace body is fixedly connected with a heat accumulator structure, the rear end of the furnace body is fixedly connected with a combustor, the rear end of the combustor is communicated with an air blower, the bottom of the furnace body is communicated with a waste gas pipe, the left side of the waste gas pipe is communicated with an air feeder, and the surface of the air feeder is communicated with an air supply pipe; and the top of the right side of the furnace body communicates with a smoke exhaust pipe. The waste gas pipe is connected with an external exhaust pipeline, waste gas is conveyed into the furnace body under the action of the air feeder, the combustor is started to conduct combustion treatment on the waste gas and heat the heat accumulator structure at the same time, and therefore follow-up input waste gas can be preheated conveniently, and the energy consumption is reduced. And the discharged waste gas enters the heat exchanger through the connecting pipe, and is discharged through the discharge pipe after heat exchange.

Processes and apparatuses converting poly- and perfluoroalkyl substances (PFAS). An oxidation reaction zone, preferably a thermal oxidizer, is utilized to oxidize the PFAS into anionic fluoride species. A treatment zone is utilized on at least a portion of the oxidation zone effluent before the oxidation zone effluent is vented or otherwise released to the atmosphere. The treatment zone may include a dry sorbent injection zone; a selective catalytic reduction zone, a wet scrubber zone; a carbon bed; an ion exchange zone; or any combination thereof.

According to the present invention, the concentrated regenerative thermal oxidizer having an electric heater applied thereto comprises: a concentration unit in which adsorption, desorption, and cooling / purging are simultaneously performed in one device through rotation to effectively process various kinds of volatile organic compounds (VOCs); and a thermal oxidation unit replacing a combustion burner using fossil fuel with an electric heater to respond to carbon neutral and converting processes with one switching damper, thereby maximizing processing efficiency.

An electrically controlled valve which can be operated using a programable controller. A cooperating pair of the electrically controlled valves can be used in a Regenerative Thermal Oxidizer (RTO). The electrically controlled valve has two seats, and a blade which can move between a first position contacting the first seat and a second position contacting the second seat. The blade is moved by an actuator which is controlled by a variable frequency drive (VFD). A control computer continuously monitors the operation of both valves and halts operation of the system upon detecting a fault (error). The motion of the blade is programmed such that force of impact on the seat is reduced. Once the blade is seated, a brake is engaged which maintains the stationary position while utilizing relatively low power.

Example thermal oxidation apparatus, control, and associated methods are disclosed herein. An example apparatus includes a pump fluidly couplable to a pipe, the pump including a nozzle at a first end of the pump, a second end of the pump open to atmosphere, an air compressor fluidly coupled to the nozzle, and a thermal oxidizer disposed in the pump between the first end and the second end, the air compressor to provide air to the nozzle to cause suction of gas from the pipe, the thermal oxidizer to convert methane in the gas to carbon dioxide and water vapor to be vented from the second end of the pump.

This application relates to a high-efficiency regenerative thermal oxidizer, comprising an incinerator, a mixing unit, a heat transfer system, and a catalytic plate. The incinerator is a hollow structure with an inlet and an outlet, and is located on one side of the mixing unit and connected to the mixing unit by pipeline. The mixing unit is a hollow shell suitable for secondary treatment of waste gas, allowing the waste gas to mix. The heat transfer system is fixedly installed inside the mixing unit, dividing the mixing unit into upper and lower layers, and the waste gas can pass through the heat transfer system. The catalytic plate is a mesh structure with a preset thickness, and the mesh structure of the catalytic plate is filled with catalyst. The catalytic plate is located in the upper layer inside the mixing unit and at the tail end of the heat transfer system. Through the above configuration, this application can save energy while achieving high overall system removal efficiency, solving the technical problem that existing incinerators require increased fuel consumption to maintain high treatment efficiency, resulting in increased energy consumption and high overall energy consumption.