38 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.

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.

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.

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.

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.

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 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 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.

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.

This application discloses a regenerative thermal oxidizer and a dust collection device. The regenerative thermal oxidizer includes a furnace body, a heat storage medium is disposed in a chamber of the furnace body, and a dust collection device is also disposed in the chamber. The dust collection device includes a dust collection section and a dust suction section. The dust collection section has an inlet for airflow, and the dust suction section is connected to the dust collection section for sucking up the dust collected by the dust collection section. The regenerative thermal oxidizer of this application has a dust collection device in its chamber, which can collect the dust formed by the combustion of flue gas in the furnace body in a timely manner, so as to facilitate the unobstructed flow of the heat storage medium and reduce or avoid downtime and energy loss caused by equipment maintenance.

The invention discloses an RTO device assembly construction method. The cross operation risk is reduced by standardizing procedures. The method comprises the core steps that firstly, a bottom air pipe, a steel support and a platform are installed; then lifting a lifting valve, a gas collecting chamber and a heat storage chamber in sequence; the heat storage chamber is filled with heat storage ceramics according to the structure of a bottom layer ceramic intalox saddle ring, a multi-layer MLM honeycomb ceramic module and a top layer intalox saddle ring. Hoisting a combustion chamber and a combustor; and finally, a fan, an air pipe and an accessory structure are installed. Wherein welded junctions are fixed through inner and outer aligning devices in air pipe welding, and gaps and deformation are effectively controlled. According to the method, construction is more standard and efficient, the cross operation risk is reduced, the heat storage efficiency is improved, and the method is suitable for large RTO projects.

The utility model provides roasting furnace flue gas treatment equipment, and relates to the technical field of flue gas treatment. The system comprises an SNCR (selective non-catalytic reduction) denitration device, a metallurgical coke adsorption device, an RTO (regenerative thermal oxidizer) heat storage high-temperature combustion device, a wet desulfurization device, a wet electrostatic precipitation device and an induced draft fan. The SNCR denitration device can remove nitric oxide in flue gas through dry denitration, the metallurgical coke adsorption device is used for removing part of asphalt smoke and part of benzopyrene in the flue gas, and the RTO heat storage high-temperature combustion device is used for removing residual asphalt smoke, benzopyrene and VOCS in the flue gas. And finally, sulfur dioxide and dust in the flue gas are removed through a wet desulphurization device and a wet electric dust removal device. The roasting furnace flue gas treatment equipment provided by the utility model not only can treat sulfur dioxide, dust and asphalt fume in the flue gas, but also can reduce the content of VOCS and benzopyrene, so that the flue gas treatment effect is effectively improved; and ultralow emission of flue gas is realized.

The utility model relates to an impregnation room VOC (volatile organic compound) emission treatment system which comprises an impregnation room, and a first waste gas exhaust pipe connected with a heat accumulating type incinerator is arranged on one side of the impregnation room; a top air seal blower is arranged at the top of the impregnation room, a bottom air seal blower is arranged at the bottom of the impregnation room, a glass room is arranged on the outer side of the impregnation room, and the glass room is communicated with the bottom of the impregnation room through a second waste gas exhaust pipe; a buffer box is arranged on the outer side of the glass room and communicates with the glass room. The buffer box is provided with a first air conveying pipe and a second air conveying pipe which are communicated with the interior of the buffer box, the first air conveying pipe is communicated with the bottom air seal air blower, and the second air conveying pipe is communicated with the top air seal air blower. According to the VOC emission treatment system for the impregnation room, waste gas is introduced into the top air seal air blower and the bottom air seal air blower to serve as fresh air supplement, emission of harmful gas is reduced, consumption of natural gas by the heat accumulating type incinerator is reduced, energy consumption is saved, and the production cost is reduced.

This invention discloses a high-efficiency, low-consumption NVOCs catalytic reduction process and equipment embedded in an RTO (Regenerative Thermal Oxidizer), belonging to the field of organic waste gas treatment. It includes a combustion chamber, several heat storage chambers, and an integrated pipeline. Of the two pipes at the top and bottom of the integrated pipeline, one is an inlet pipe and the other is an exhaust pipe. The middle pipe is a central gas chamber inlet / outlet connection pipe. The central gas chamber inlet / outlet connection pipe contains an NVOCs catalyst. The central gas chamber inlet / outlet connection pipe is divided into several sub-inlet / outlet connection pipes by several partitions, each corresponding to a heat storage chamber. Each sub-inlet / outlet connection pipe has two vents, connected to the upper and lower pipes respectively. Each vent is individually controlled to open and close. This invention can effectively pre-catalyze NVOCs, preventing NOx exceedances at the RTO outlet. The inlet and exhaust pipes are concentrated on one side of the gas chamber, resulting in a compact layout, small footprint, and convenient maintenance. Pre-catalysis fully utilizes exhaust waste heat, eliminating the need for additional heating devices and reducing operating costs.

This invention discloses an organic waste gas RTO (Regenerative Thermal Oxidizer) treatment device and its operating method, belonging to the field of organic waste gas purification and treatment technology. It includes a heat treatment component and a return gas component. The heat treatment component includes a first heat exchange module and a second heat exchange module for heat storage or release, and a combustion chamber connected to both. The return gas component includes a return gas reaction chamber and a return gas pipeline, with the return gas reaction chamber connected to the combustion chamber. The return gas pipeline is interconnected with the first heat exchange module, the second heat exchange module, and the return gas reaction chamber. The return gas pipeline is equipped with a first driving element for driving gas flow. The return gas pipeline can control the return gas reaction chamber to be connected to at least one of the first and second heat exchange modules, for introducing residual organic waste gas from the first and / or second heat exchange modules into the combustion chamber. This invention can perform return gas purging of the heat storage reaction chamber, avoiding direct discharge and atmospheric pollution.

The application discloses a VOCs catalytic conversion bed, a catalytic conversion device and an operation method thereof, wherein the VOCs catalytic conversion bed comprises, from bottom to top, a heat accumulation zone, a mixed combustion-supporting zone and a catalytic reaction zone; the heat accumulation zone comprises a first heat accumulation zone and a second heat accumulation zone, the first heat accumulation zone is used for preheating VOCs, the second heat accumulation zone is used for preheating an oxidant, the first heat accumulation zone and the second heat accumulation zone are independent of each other, and the first heat accumulation zone and the second heat accumulation zone are in communication with the mixed combustion-supporting zone; the mixed combustion-supporting zone is provided with an ignition device, and the ignition device is used for igniting and supporting combustion of VOCs and the oxidant entering the mixed combustion-supporting zone; and the catalytic reaction zone comprises a plurality of catalytic layers and a plurality of heat exchange layers. The VOCs catalytic conversion device provided by the application can realize efficient and safe conversion of VOCs.

This utility model relates to the field of exhaust gas treatment technology for color coating production lines, and discloses a temperature control system for a color coating line RTO (Regenerative Thermal Oxidizer), including an inlet pipe, an inlet fan, an outlet pipe, an outlet fan, a cold bypass pipe, a control valve one, a hot bypass pipe, and a control valve two. Through the above-described structure, this utility model can rapidly reduce the temperature inside the RTO incineration chamber at the beginning of exhaust gas treatment, making the internal temperature of the RTO more stable and preventing the incineration chamber temperature from rising and reaching the alarm temperature range, thus avoiding product degradation and effectively reducing the user's production costs.

This invention discloses a safety evaluation method for RTO (Regenerative Thermal Oxidizer) waste gas treatment systems, belonging to the technical field of waste gas treatment system safety evaluation. This method achieves a comprehensive and accurate safety evaluation of RTO waste gas treatment systems through steps such as determining the evaluation scope and basic parameters, screening safety accessories and setting data collection standards, dividing safety accessory data intervals and performing hazard classification, comprehensive safety classification of the process unit, determining and dynamically adjusting safe and reliable parameter intervals, and outputting and applying the evaluation results. Based on twelve sets of core safety accessories, this invention divides four hazard intervals based on standards, specifications, and operational experience, employs a weighted scoring method for comprehensive classification, clarifies safe and reliable parameter intervals, and establishes a dynamic adjustment mechanism. It solves the problems of existing evaluation methods being primarily qualitative, having a single dimension, and lacking operability. This method can accurately identify safety hazards, provides a standardized basis for the safe operation and maintenance and risk management of RTO systems, is adaptable to different operating conditions, and has significant application value.

The invention relates to a method for enhancing Claus tail gas treatment using sulfur dioxide selective membrane technology, in particular to a method for improving sulfur recovery in an acid gas feed, comprising the steps of: introducing the acid gas feed and a sulfur dioxide-rich air stream into a Claus process to produce a product gas stream, introducing the product gas stream into a thermal oxidizer to produce a flue gas stream, cooling the flue gas stream to produce a cooled exhaust stream; separating the cooled exhaust stream into a saturated gas stream, heating the saturated gas stream to produce a film gas stream; the method includes introducing a membrane gas stream into a membrane purge unit, the membrane purge unit including a membrane, sulfur dioxide in the membrane gas stream permeating the membrane of the membrane purge unit, introducing a purge air stream, the purge air stream collecting sulfur dioxide to produce a sulfur dioxide rich air stream.

The present invention is directed to a method of making such gypsum panel. For instance, the method comprises: providing a first facing material; providing a gypsum slurry including calcium sulfate hemihydrate, water, and a silicon containing compound onto the first facing material; providing a second facing material onto the gypsum slurry to form a continuous gypsum sheet; allowing the calcium sulfate hemihydrate to hydrate to form calcium sulfate dihydrate; cutting the continuous gypsum sheet to form a gypsum panel; supplying the gypsum panel to a heating or drying device; and providing a gaseous mixture from the heating or drying device to a regenerative thermal oxidizer.

The utility model discloses a supporting structure of an RTO (regenerative thermal oxidizer) heat storage brick, which comprises connecting components at least fixedly connected with the inner walls of two sides of a heat storage chamber, the top of any connecting component is lapped with a supporting component, the supporting component is fixedly connected with other connecting components, the heat storage brick is placed on the supporting component, each connecting component comprises a connecting piece, the connecting piece is an L-shaped angle steel, and the connecting piece is an L-shaped angle steel. The side faces of the connecting pieces are fixedly connected with the inner wall of the heat storage chamber, the top of any connecting piece is in lap joint with a supporting assembly, and the supporting assembly is fixedly connected with other connecting pieces. The supporting structure of the RTO heat storage brick solves the problem that an existing supporting structure of the heat storage brick is prone to deformation or breakage, and therefore the heat storage brick is placed unstably.

The invention relates to the technical field of supervision control and data acquisition, and discloses a coating workshop visual RTO intelligent linkage constant temperature system which comprises a multi-parameter sensing network, a central processing unit, a constant temperature and air valve regulation and control module, a heat storage type thermal oxidation furnace device, an emergency processing device and a visual monitoring platform. The system adopts a partition temperature weighting model to calculate the comprehensive control temperature, and an orthogonal experiment is utilized to determine the weight; flow-heat-mass coupling control is executed, and the power of the combustor is adjusted in combination with air quantity feed-forward compensation and temperature feedback; and setting a dual-threshold grading emergency response logic. According to the method, the problems of large-space temperature control lag and energy efficiency evaluation deficiency are solved, online adaptive optimization of the control parameters is realized, and the safety, the energy efficiency level and the operation stability of the system are improved.

The invention belongs to the technical field of heat accumulating type thermal oxidation furnace control, and particularly relates to an energy-saving optimization control system of a heat accumulating type thermal oxidation furnace, which comprises a core control unit, a programmable logic controller serving as a main station and at least one remote IO station in communication connection with the main station through an industrial field bus; the sensing detection module is configured to acquire operation parameters of the RTO system in real time; the actuating mechanism module at least comprises a variable-frequency driver of the induced draft fan, a start-stop control unit of the combustion fan, an ignition and firepower adjusting unit of the combustor and a driving device of the valve group; the human-computer interaction interface is used for system parameter setting, real-time operation state visual display, historical data recording and alarm information management; and the independent weak current grounding system provides a special grounding loop for the core control unit, the sensing detection module and the human-computer interaction interface. The energy consumption is obviously reduced, and safe and stable operation is ensured.

The application discloses a kind of high efficiency low consumption lithium battery waste gas intelligent processing method and device, belong to waste gas treatment technical field, it includes by metal filter cartridge filtration and is imported into heat accumulating type thermal oxidizer, and oxidation decomposition is carried out in combustion chamber, generates high-temperature purified waste gas;Collect the outlet temperature data of heat accumulating type thermal oxidizer and the circulating liquid state data of caustic washing tower, fusion into integrated state data;Combining the real-time operating parameters of quenching treatment and caustic washing treatment, generate quenching control instruction and caustic washing control instruction;According to quenching control instruction, high-temperature purified waste gas is carried out dry quenching treatment, and export dry cooling waste gas is generated;According to caustic washing control instruction, dry cooling waste gas is carried out lye washing, and standard waste gas is generated and is discharged.The application uses the intelligent control strategy of fusion upstream thermal oxidation outlet and downstream caustic washing state data, can realize the collaborative optimization to waste gas treatment whole process, to improve purification efficiency and reduce operating consumption.

A control process and apparatus provide feed forward control of stoichiometric proportions of hydrogen sulfide and ammonia to a thermal oxidizer and an ammonia scrubber, respectively. To account for unmeasured or uncalculated sulfur feed to the thermal oxidizer, a feed back measurement of sulfur dioxide and ammonia concentration is used to correct the flow rate of hydrogen sulfide to the thermal oxidizer and / or ammonia to the ammonia scrubber.

A process for air purification includes feeding a first stream comprising methane into a regenerative thermal oxidizer (RTO). The RTO is configured to thermally oxidize a first portion of the methane within the first stream. The process also includes obtaining a thermally oxidized first stream from the RTO. The thermally oxidized first stream comprises a second portion of the methane, and the second portion of the methane is not thermally oxidized within the RTO. In addition, the process includes feeding the thermally oxidized first stream into a catalytic reactor configured to catalytically oxidize the second portion of methane within the thermally oxidized first stream. The catalytic reactor comprises a methane catalyst. Further, the process includes obtaining a methane lean stream from the catalytic reactor.

A process for air purification includes feeding a first stream comprising methane into a regenerative thermal oxidizer (RTO). The RTO is configured to thermally oxidize a first portion of the methane within the first stream. The process also includes obtaining a thermally oxidized first stream from the RTO. The thermally oxidized first stream comprises a second portion of the methane, and the second portion of the methane is not thermally oxidized within the RTO. In addition, the process includes feeding the thermally oxidized first stream into a catalytic reactor configured to catalytically oxidize the second portion of methane within the thermally oxidized first stream. The catalytic reactor comprises a methane catalyst. Further, the process includes obtaining a methane lean stream from the catalytic reactor.

Apparatus and methods to eliminate PFAS from wastewater biosolids through fluidized bed gasification. The gasifier decomposes the PFAS in the biosolids at temperatures of 900-1800° F. Syngas exits the gasifier which is coupled to a thermal oxidizer and combusts at temperatures of 1600-2600° F. This decomposes PFAS in the syngas and creates flue gas. Heat is recovered from the flue gas by cooling the flue gas to temperatures of 400-1200° F. in a heat exchanger coupled with the thermal oxidizer. Various methods inject moisture into the gas stream, controlling temperature through evaporative cooling and / or injecting chemicals that react with gas stream components. Cooled flue gas mixes with hydrated lime capturing decomposed PFAS molecules with spent lime filtered from the cooled flue gas using a filter system that may incorporate catalyst impregnated filter elements, eliminating PFAS from wastewater biosolids and controlling emissions in the resulting flue gas.