760 results about "Catalytic combustion" patented technology

The invention discloses a self-adaptive calibration system and method for a combustible gas sensor. The self-adaptive calibration system and method are suitable for a catalytic combustion type combustible gas sensor. The system comprises a basic calibration unit, a real-time monitoring unit, a drift detection and compensation unit and an output adjustment unit. The basic calibration unit is used for carrying out basic calibration on the sensor and determining an initial sensitivity coefficient, zero offset and response time of the sensor; the real-time monitoring unit is used for monitoring real-time parameters of the sensor under different environmental conditions; the drift detection and compensation unit is used for establishing a sensor performance parameter drift model and calculating a calibration compensation coefficient; the output adjusting unit is used for adjusting the voltage output value of the sensor in real time according to the calibration compensation coefficient; the method can adapt to environment change for real-time calibration, effectively compensates sensor drift, improves measurement precision and reliability, prolongs the service life of the sensor, reduces maintenance cost, and improves system safety.

The invention belongs to the technical field of catalytic oxidation of carbon-containing industrial waste gas, and particularly relates to a Pd catalyst for catalytic combustion of carbon-containing waste gas as well as a preparation method and application of the Pd catalyst. The invention provides a Pd catalyst for catalytic oxidation of carbon-containing industrial waste gas such as CO and volatile organic pollutants VOCs. The Pd catalyst is obtained by compounding an amorphous CeO2 nano-cluster with a TiO2 substrate (marked as cCeO2 / TiO2) and indirectly regulating the form of Pd through gradient regulation of the content of the amorphous CeO2 nano-cluster by a sol-gel method on the basis of strong interaction of Pd and Ce species. The Pd catalyst prepared by the invention shows excellent low ignition temperature, high performance and certain universality in the catalytic combustion process of carbon-containing industrial waste gases such as CO and low-chain VOCs (Volatile Organic Compounds). In addition, the method for preparing the Pd catalyst is simple to operate and mild in condition, and has great industrial application potential and value.

The invention discloses activated carbon adsorption and desorption catalytic combustion equipment, and belongs to the field of waste gas treatment. The activated carbon adsorption and desorption catalytic combustion equipment comprises a spray tower, a dry filter, a catalytic combustion furnace, a heat exchange mechanism, an exhaust fan and a discharge pipe, an air inlet pipe is arranged at the air inlet end of the spray tower, and a first connecting pipe is arranged between the air outlet end of the spray tower and the air inlet end of the dry filter; the air inlet end of the air exhaust fan is provided with an air exhaust pipe, and the air exhaust end of the dry filter is provided with a second connecting pipe; the first gas inlet pipe is arranged at one end of the adsorption tower, and the first gas inlet pipe is communicated with the second connecting pipe; the catalytic efficiency of desorbed organic matters is effectively improved, meanwhile, small-particle dust is effectively prevented from being attached to the main activated carbon plate to affect the adsorption effect and the desorption effect, and waste gas is effectively prevented from being exhausted into the atmosphere to pollute the air.

The invention discloses an indoor gas leakage monitoring and intelligent joint control system, and belongs to the technical field of intelligent safety monitoring systems. Comprising a sensing layer, a network layer, a control layer and a platform layer, the sensing layer comprises a multi-sensor array and an edge computing node, the multi-sensor array is combined with a catalytic combustion sensor, an infrared sensor, a semiconductor sensor and a temperature and humidity sensor, and sensor data are fused through a weighting algorithm so as to reduce the false alarm rate; a temperature and humidity sensor dynamically adjusts a detection threshold value to adapt to different climate conditions, and an edge computing node is deployed with a lightweight machine learning model. Through multi-sensor data fusion and a weighting algorithm, the false alarm rate is reduced to be smaller than 0.1% per year, environment self-adaptive calibration and AI auxiliary decision making are performed, interference of alcohol, perfume and the like is effectively eliminated, different climate conditions are adapted, leakage judgment is completed at an equipment end through edge calculation, cloud delay is avoided, a multi-stage emergency strategy is provided, and intelligent safe ecology driven by the Internet of Things is constructed.

The invention belongs to the field of waste gas treatment, and particularly discloses an automatic waste gas control treatment method for coating equipment, which comprises the following steps: acquiring the real-time flow of waste gas generated by the coating equipment, and introducing the waste gas into a rotational flow plate tower spraying device when the real-time flow of the waste gas reaches a pre-starting flow value; starting a circulating spraying pump in a spraying device of the rotational flow plate tower so as to uniformly spray and purify the waste gas; the cyclone plate is controlled to separate out preliminarily purified waste gas, and the preliminarily purified waste gas is conveyed into an activated carbon adsorption concentration device to be subjected to adsorption treatment; when the adsorption treatment meets a desorption condition, controlling a desorption fan to start so as to heat and desorb the organic waste gas adsorbed by the activated carbon adsorption concentration device; the desorbed organic waste gas is input into a catalytic combustion carbon dioxide device to be preheated and catalyzed to obtain purified waste gas, and the purified waste gas and the organic waste gas to be subjected to catalytic treatment are subjected to heat exchange in the catalytic combustion carbon dioxide device and then discharged. Full-automatic efficient purification treatment of the waste gas of the coating equipment can be achieved.

The invention provides a cerium oxide photo-thermal synergistic catalytic material loaded with a metal promoter as well as a preparation method and application of the cerium oxide photo-thermal synergistic catalytic material. The cerium oxide photo-thermal synergistic catalytic material loaded with the metal promoter comprises a cerium oxide nanocrystal and the metal promoter loaded on the surface of the cerium oxide nanocrystal, the exposed crystal face of the cerium oxide nanocrystal comprises a {111} crystal face, and the area of the {111} crystal face accounts for more than 50% of the total area of the outer surface of the crystal face; the mass fraction of the metal cocatalyst is 0.1-2wt% of the mass of the cerium oxide. The catalytic material provided by the invention takes cerium oxide with a {111} crystal face as an exposed special crystal face as a carrier, photons can be captured and charges can be separated more efficiently, and phonons further promote deep trap state charge release. Meanwhile, the metal additive is added and cooperates with cerium oxide with exposed special crystal faces for catalysis, so that the catalytic effect is remarkably improved, and efficient catalytic combustion of methane is achieved under the mild condition.

The invention discloses a preparation method of a low-temperature high-air-velocity VOC (volatile organic compound) catalyst and the catalyst, belongs to the field of industrial waste gas treatment, and aims to solve the problems that volatile organic compounds VOCs as main atmospheric pollutants cause photochemical smoke and harm human health; a VOCs catalyst in the prior art cannot meet catalytic combustion treatment process conditions at a high space velocity of 30000 h <-1 >. The high airspeed VOCs noble metal catalyst is developed aiming at a complex volatile organic compound VOCs catalytic combustion technology and meets industrial requirements, and the maximum airspeed of the catalyst is 30000 h <-1 >. The catalyst is an integral honeycomb catalyst formed by taking a double-effect synergistic two-component noble metal precursor, a transition metal oxide and a rare earth oxide as active components, so that the oxygen vacancy of a carrier and the acidity of a catalyst Bronsted acid are enhanced, and the capabilities of oxygen vacancy flow on the surface of the catalyst and adsorption and oxidative dissociation of functional groups on the surface of VOCs (Volatile Organic Compounds) are enhanced.

The utility model relates to the technical field of combustion devices, and discloses an environment-friendly catalytic combustion device which comprises combustion equipment, a water tank, a filter box and a heating radiator, a heat exchange pipe is installed on one side of the top end of the combustion equipment, and the middle of the heat exchange pipe is a snake-shaped part. Through the design, after water in the water tank is heated by the heat exchange pipe communicated with the combustion equipment, hot air emitted by hot water is conveyed to the heating radiator through the first exhaust pipe communicated with the top of the water tank, the top of the filter box is communicated with the second exhaust pipe, and the hot air which is filtered and still has waste heat is also conveyed to the heating radiator through the second exhaust pipe to be utilized; and the filter box is fan-shaped, the rotating disc is rotated through the motor, so that one side, provided with a newly-installed filter plate, of the outer side of the rotating disc is rotated into the filter box for use, the used side is rotated out of the filter box, the filter plate can be quickly replaced, and the disassembly and assembly difficulty of the filter element is reduced.

The utility model discloses a flame-catalysis integrated combustor, which solves the problem that catalytic combustion and flame combustion are not integrated in the prior art, and has the beneficial effects of realizing integrated combustion and improving combustion efficiency, and the specific scheme is as follows: the flame-catalysis integrated combustor comprises a shell, one side of the shell is provided with an air inlet, and the other side of the shell is provided with an air outlet; a fuel-air mixer, a flame tube and a catalytic component are sequentially arranged in the shell from one side of the air inlet to the other side of the shell, the fuel-air mixer comprises a plurality of fuel distribution chambers which are sequentially arranged in a nested mode, and a gas circulation channel is formed between every two adjacent fuel distribution chambers; the fuel distribution chambers are provided with fuel spray holes facing the gas circulation channel, the outlet end of the fuel-air mixer is inserted into the flame tube, the flame tube comprises a shell, the shell and the shell are arranged at an interval, and the catalytic component is fixed to the end, away from the fuel-air mixer, of the shell of the flame tube.

The invention discloses an organic waste gas catalytic purification device with an airflow multi-stage circulation function. The organic waste gas catalytic purification device comprises a box body, a gas inlet pipe, a gas outlet pipe I, a gas outlet pipe II, an adsorption mechanism, a desorption mechanism, a catalytic combustion mechanism, a heat transfer pipe and a connecting pipe, a partition plate I is arranged in the box body and divides the box body into an adsorption bin and a catalytic combustion bin; an air inlet pipe is arranged on the side wall of a box body of the adsorption bin, and an air outlet pipe I is arranged at the top; a gas outlet pipe II is arranged on the side wall of the catalytic combustion bin; the adsorption mechanism and the desorption mechanism are both installed in an adsorption bin of the box body, the catalytic combustion mechanism is installed in a catalytic combustion bin of the box body, and the two ends of the heat transfer pipe are connected with the top of the desorption mechanism and the top of the catalytic combustion mechanism respectively. The connecting pipe is connected to the bottoms of the desorption mechanism and the catalytic combustion mechanism. Organic waste gas can be repeatedly adsorbed, so that the organic waste gas is fully adsorbed and purified; the activated carbon plates in the adsorption cylinder and the desorption cylinder can be quickly replaced.

The invention discloses a catalytic combustion auxiliary preheating ammonia-hydrogen engine system and an operation method, the catalytic combustion auxiliary preheating ammonia-hydrogen engine system comprises an ammonia decomposition system, a NOx decomposition system, an ammonia-hydrogen engine, a flameless combustion system, an air source and an ammonia gas source, a preheating cooling cavity rapidly heats the inner wall surface of a combustion cavity to reach the temperature required by flameless combustion; tail gas generated by combustion further preheats all parts of the ammonia decomposition system and the NOx decomposition system, the response speed in the starting stage is increased, and in the normal operation stage, high-temperature combustion tail gas generated by flameless combustion is sequentially introduced into the heating cavity and the combustion tail gas heat supply cavity to heat the ammonia decomposition cavity so as to decompose ammonia gas in the ammonia decomposition cavity into hydrogen, and the hydrogen is converted into nitrogen; and the NOx decomposition cavity is heated to decompose NOx in the tail gas of the engine into NO, the combustion-supporting mixed gas is preheated through the preheating cooling cavity and then sprayed into the combustion cavity, the combustion-supporting mixed gas is mixed with ammonia gas for flameless combustion, and flameless combustion is further assisted.

The invention discloses a flue gas treatment system and a flue gas treatment process, and relates to the field of flue gas treatment.The flue gas treatment system comprises (a) a cooling and washing device (2) used for cooling and washing flue gas so as to dehumidify the flue gas, and (b) a flue gas treatment device (3) used for cooling and washing the flue gas, (b) the deoxidizing device (3) is used for deoxidizing the flue gas from the cooling and washing device (2); (c) a catalytic combustion subsystem (4) for combusting carbon monoxide in the flue gas from the deoxidizing device (3); and (d) a waste heat recovery subsystem (5) for recovering the heat of the flue gas from the catalytic combustion subsystem (4). According to the system, the heat of the flue gas can be fully recovered while the emission of pollution gas is reduced, and the comprehensive utilization of the chlorinated flue gas is realized.

The invention provides an anode tail gas recovery and tail gas combustion combined SOFC (Solid Oxide Fuel Cell) combined cooling heating and power system and method. The system comprises an SOFC power generation module, an input system and a tail gas treatment and energy recovery module, the SOFC power generation module is respectively connected or disconnected with the input system and the tail gas treatment and energy recovery module; according to the anode tail gas recovery and tail gas combustion combined SOFC combined cooling heating and power system and method, the structure of the system can be optimized, anode tail gas shunting and intelligent circulation are achieved, and catalytic combustion cooperative treatment is guaranteed; a multi-grade energy cascade recovery system is realized; and an intelligent cooperative control system is realized.

The invention discloses a VOCs emission dynamic prediction and energy-saving control system for catalytic combustion equipment in a casting workshop and a medium, the system comprises a high-frequency VOCs concentration monitoring unit which adopts TDLAS and FTIR spectrum analyzers and obtains high-precision concentration data through a data fusion algorithm, and a secondary differential signal of the TDLAS analyzer is independently extracted as a key feature; the data preprocessing and feature engineering module is used for processing multi-source data; the dynamic emission prediction module is internally provided with an attention mechanism time sequence convolutional network ATCN model, and realizes the ultra-early prediction of the emission concentration by fusing the secondary differential signal and historical data; the multi-objective optimization control module adopts a model predictive control MPC framework, the lowest comprehensive operation cost is taken as an objective, a dynamic virtual carbon penalty coefficient beta can be dynamically adjusted according to a workshop production plan, an advanced control instruction is generated through rolling optimization, and the equipment power and the fan frequency are adjusted; according to the method, ultra-early prediction, prospective control, energy conservation and consumption reduction of VOCs treatment are realized.

The invention discloses a color-coated sheet VOC low-temperature catalytic combustion system and method, and the system comprises the following unit modules: a waste gas collection unit used for collecting VOC-containing waste gas volatilized in a color-coated sheet production process; the pretreatment module is connected with the waste gas collection unit and is used for pretreating the collected waste gas and removing impurities such as dust and liquid drops in the waste gas; the preheating device is connected with the pretreatment module and is used for heating the pretreated waste gas to a temperature interval suitable for catalytic reaction; the catalytic combustion reaction device is connected with the preheating device, is filled with a low-temperature catalyst and is used for promoting VOC (Volatile Organic Compounds) in the waste gas to generate a catalytic combustion reaction under a low-temperature condition; the heat recovery and cyclic utilization assembly is connected with the catalytic combustion reaction device and is used for recovering heat generated by reaction and feeding back part of the heat to the preheating device for preheating the waste gas; and the tail gas purification and emission unit is arranged behind the catalytic combustion reaction device and is used for deeply purifying the reacted tail gas to ensure that the tail gas is discharged after reaching the standard.

The invention discloses a VOC (volatile organic compound) recovery and treatment device in a color-coated sheet production process, which comprises a sealing cover and a controller, the sealing cover is connected with a transition pipe through an induced draft fan, the transition pipe is connected with a cold liquid pipe through a condenser, the cold liquid pipe is connected with a liquid discharge pipe, the liquid discharge pipe is connected with a liquid collection tank through a liquid collection valve, and the liquid collection tank is connected with a liquid level sensor and the liquid discharge valve. The cold liquid pipe is connected with a gas distributing pipe, the gas distributing pipe is connected with an absorption and desorption tank through a gas inlet valve, a grid support is connected in the absorption and desorption tank, the grid support is connected with an adsorbent, the absorption and desorption tank is connected with a heater and a blower, the absorption and desorption tank is connected with a catalytic combustion chamber through an output valve, and the absorption and desorption tank is connected with a transition pipe through a return valve. The method has the beneficial effects that efficient recovery is achieved, and resource utilization is maximized; deep purification is achieved, and the environment-friendly effect is remarkable; energy is saved, consumption is reduced, and cost is greatly reduced; intelligent control is achieved, and operation is stable and reliable; the structure is optimized, and maintenance is convenient and efficient.

The invention relates to the technical field of explosion-proof transformers, in particular to a nitrogen filling control system for an explosion-proof transformer, which comprises a data acquisition module, a feature extraction module, a full-scene analysis module, a dynamic response module and a feedback optimization module. The system is connected with a multi-node transformer through a short-distance communication technology, acquires running state data in real time, generates a multi-dimensional evaluation value by utilizing a catalytic combustion sensor, load prediction and external scene prediction, judges an abnormal event in combination with a global analysis model, dynamically adjusts the nitrogen charging and discharging rate, and achieves the purpose of monitoring the nitrogen charging and discharging rate. And meanwhile, the prediction precision and the response efficiency are improved through a closed-loop optimization mechanism. According to the application, multi-node cooperative monitoring and accurate prediction can be realized, the safety and reliability of the explosion-proof transformer are significantly improved, and the occurrence of potential critical conditions is effectively avoided.

The invention discloses a preparation method of an adsorption material for catalytic combustion of VOCs, and belongs to the technical field of environment-friendly catalytic materials. The method comprises the following steps: mixing silica sol, kaolin and an HZSM-5 molecular sieve according to a mass ratio of 1: (0.6-0.8): (0.4-0.5), and pulping to form slurry with the solid content of 25%-40%; adding polyethylene glycol (the molecular weight is 300-600) which accounts for 1-5% of the mass of the slurry, and uniformly dispersing; dripping into an oil phase at the temperature of more than or equal to 70 DEG C through a 0.5-1 mm dropper to form a 1-2 mm gel bead; pre-drying for 2-4 hours at the temperature of 80-120 DEG C, heating to 600-750 DEG C at the speed of 3-5 DEG C / min, and roasting for 2-5 hours; and the roasted pellets, sodium metaaluminate, a guiding agent and water are subjected to dynamic crystallization according to the mass ratio of 1: (0.1-0.3): (0.05-0.15): (5-10), and finally metal is loaded. The sphericity of the carrier is gt under the synergistic effect of oil column forming and polyethylene glycol; the compressive strength is not less than 40 N; the kaolin enhances the mechanical performance, and the HZSM-5 constructs hierarchical pore channels (the pore volume is 0.3-0.5 cm / g, and the specific surface area is gt and 300 m / g), so that the VOCs adsorption capacity is improved.

The invention relates to the technical field of combustion equipment, and discloses a pure ammonia combustor carrying ammonia catalytic combustion and decomposition compositing and a control method.The pure ammonia combustor comprises a combustion sleeve, the combustion sleeve comprises an inner sleeve body and an outer sleeve body, an outer cavity is formed between the inner sleeve body and the outer sleeve body, and the inner sleeve body is provided with an inner cavity; the inner cavity comprises a combustion nozzle, a combustion cavity and a to-be-combusted cavity, a first ignition device is arranged between the combustion cavity and the to-be-combusted cavity, the to-be-combusted cavity communicates with a first air inlet, and the outer cavity comprises a preheating cavity, a combustion catalysis cavity and a catalytic decomposition cavity; the preheating cavity is located on the periphery of the combustion cavity. The combustion catalysis cavity is located on the periphery of the to-be-combusted cavity and provided with an ammonia catalytic combustion catalyst and a second ignition device, and the catalytic decomposition cavity is provided with an ammonia catalytic decomposition catalyst and communicates with the to-be-combusted cavity. The problems that pure ammonia ignition is difficult, the laminar flow combustion speed is low, flames are difficult to stabilize, and NOx emission is high are solved.

The invention provides a catalytic combustion testing device and a catalytic combustion testing method for an SOFC (Solid Oxide Fuel Cell), and belongs to the field of solid oxide fuel cells. Comprising a fan, a heat exchanger, a mixing pipeline, a combustor, a heating device and an observation device. Wherein the outlet end of the fan is connected with a cold stream inlet of the heat exchanger, a cold stream outlet of the heat exchanger is connected with one end of the combustor through the mixing pipeline, the mixing pipeline is provided with a gas connecting pipe, a catalyst carrier is arranged in the combustor, and the other end of the combustor is connected with a hot stream inlet of the heat exchanger. A carrier temperature sensor connected with the catalyst carrier is arranged on the combustor, the heating device is connected with the combustor, pressure sensors and temperature sensors are arranged at the two ends of the combustor, and the observation device is connected with an inner cavity of the combustor. The actual working conditions of combustors in SOFC systems of different specifications can be simply and quickly simulated, and the performance verification test of the catalyst is realized.

The utility model discloses a novel anti-backfire hydrogen catalytic combustion reactor, which belongs to the technical field of industrial waste gas treatment, and comprises a reaction box, the top end of the reaction box is respectively and fixedly connected with a gas supply pipe for injecting waste gas and a discharge pipe for discharging standard gas, and one side of the bottom end of the reaction box is fixedly provided with a combustion pipe. The end, away from the reaction box, of the combustion pipe is fixedly connected with a combustor used for promoting combustion reaction, a fixing plate is fixedly installed in an inner cavity of the reaction box, the top end of the fixing plate is fixedly connected with a heat exchange pipe used for preheating waste gas, and the top end of the heat exchange pipe communicates with a discharging pipe. One side of the fixing plate is fixedly connected with a first catalysis plate and a second catalysis plate which are used for assisting efficient combustion of waste gas, the problem of backfire in equipment can be effectively solved by arranging a flow intercepting structure, waste gas flowing is cut off in time through attachment of a flow intercepting cover and a flow guiding opening, reverse spreading of flames is prevented, and the safety of the equipment and personnel is guaranteed.

The invention discloses an activated carbon waste gas treatment system for a cigarette package printing workshop, and relates to the technical field of waste gas treatment, the activated carbon waste gas treatment system comprises a waste gas collection device, a pretreatment device, an activated carbon adsorption tank, a catalytic combustion device and a desorption regeneration device, the bottom end of the activated carbon adsorption tank is provided with a gas inlet and outlet, and the top end of the activated carbon adsorption tank is provided with an exhaust port; a manhole is formed in one side of the activated carbon adsorption tank, an upper net partition plate and a lower net partition plate are arranged in the activated carbon adsorption tank, and activated carbon particles are arranged between the upper net partition plate and the lower net partition plate. The distance between the upper net partition plate and the lower net partition plate can be adjusted through the lifting driving mechanism, activated carbon particles are compacted, and the adsorption effect is improved. The distributor is arranged at the gas inlet in the adsorption tank, so that the waste gas is uniformly dispersed, the problems of low adsorption and regeneration efficiency, inconvenience in maintenance and the like of a traditional waste gas treatment system are effectively solved, and the waste gas is efficiently and stably treated to reach environmental protection standards.

The invention discloses a hydrogen concentration sensor which comprises a thermoelectric power generation module, a concentration detection module and a control module, wherein the temperature difference power generation module carries out catalytic combustion when hydrogen is sucked in so as to generate target voltage, and the target voltage is used for supplying power to the concentration detection module and the control module; the concentration detection module is used for detecting the hydrogen concentration in the environment after power supply, generating a voltage signal and sending the voltage signal to the control module; and the control module is used for judging the hydrogen concentration in the environment according to the voltage signal. Therefore, compared with a linear hydrogen concentration sensor, the self-powered hydrogen concentration sensor has the advantages that an additional power supply is not needed, complicated circuits and related circuit loss are avoided, the sensor can be integrated and miniaturized, the sensor can be better applied to a complicated environment, and the self-powered hydrogen concentration sensor can guarantee continuous monitoring.

The invention relates to a low-temperature-activated hydrothermal stable formaldehyde production tail gas purification catalyst and a preparation method thereof. The catalyst comprises an active component, a carrier, an active auxiliary agent and a hydrothermal stabilization auxiliary agent, wherein the active component is selected from any one or two of Pt, Pd and Ru; the carrier is active aluminum oxide, and the active auxiliary agents are La2O3 and SrO; and the hydrothermal stabilizing aid is borophosphate. The catalyst can be applied to a methanol-to-formaldehyde tail gas purification device, organic matters such as formaldehyde, methanol and dimethyl ether and CO in tail gas are simultaneously removed through catalytic combustion, and the problems that an existing catalyst is high in activation temperature and poor in hydrothermal stability are solved. After the catalyst is modified, the light-off temperature is reduced, the hydrothermal stability is obviously improved, the catalyst still has better low-temperature light-off and high-temperature activity after being aged for 15 hours at the temperature of 650 DEG C, the light-off temperature is not higher than 140 DEG C, outlet CO, methanol and formaldehyde are all smaller than 0.1 ppm, and dimethyl ether is smaller than 20 ppm.

The intelligent catalytic oxidation incineration device for waste gas treatment comprises a gas inlet pipe, a dry filter, a pretreatment assembly, a preheating heat exchanger and a catalytic combustion assembly, one end of the gas inlet pipe communicates with the dry filter, and a first conveying pipe communicates between the dry filter and the pretreatment assembly; a second conveying pipe is arranged between the pretreatment assembly and the preheating heat exchanger in a communicating mode, a third conveying pipe is arranged between the preheating heat exchanger and the catalytic combustion assembly in a communicating mode, the catalytic combustion assembly comprises a catalytic combustion cylinder and a sliding plate, the catalytic combustion cylinder comprises an upper cylinder body and a lower cylinder body, and the sliding plate is arranged between the upper cylinder body and the lower cylinder body in a sliding mode; two mounting openings are formed in the sliding plate, lap joint edges are arranged at the bottom ends of the inner ring walls of the mounting openings, and a catalytic block is placed in each mounting opening. The device has the advantages that the catalyst can be quickly replaced, and the service life of the catalyst is prolonged.

According to the modularized self-heating ammonia decomposition hydrogen production reaction device and the ammonia decomposition hydrogen production system provided by the invention, the modularized self-heating ammonia decomposition reaction device exchanges heat with ammonia gas through high-temperature mixed gas generated by ammonia decomposition and then performs ammonia absorption treatment, so that heat is fully utilized; one part of ammonia decomposition mixed gas serves as fuel to be input into a combustion chamber for catalytic combustion, heat is provided for ammonia decomposition, and self-sufficiency of the heat is achieved; and meanwhile, the tail gas at the anode outlet of the fuel cell is partially and circularly introduced into the anode of the fuel cell, so that the energy utilization rate is increased.

The invention discloses a sulfur-resistant Pt-based CO oxidation catalyst and a preparation method thereof, and belongs to the technical field of catalysts. According to the prepared catalyst, CZLY composite OSM is adopted as a carrier, rare earth oxide Gd2O3 is added for modification, and precious metal Pt is loaded through a polyhydric alcohol method. According to the preparation method, the catalyst has the advantages of rare earth elements and precious metals, the specific surface area of the material is effectively increased, loading and dispersion of active components are promoted, and the CO catalytic oxidation activity is remarkably improved. Meanwhile, by adding Gd2O3, the thermal stability and the sulfur-resistant stability of the catalyst are enhanced, so that the catalyst can keep efficient catalytic performance in an SO2-containing atmosphere for a long time, the catalytic combustion temperature and the catalytic cost are reduced, and the catalyst is suitable for popularization and application.

The invention discloses a continuous foaming composite process for a pearl wool coiled material and a waste gas recovery system thereof, and belongs to the technical field of pearl wool processing. Aiming at the problems of low efficiency and waste gas pollution of a traditional intermittent process, the process realizes continuous production through raw material selection (the melt index of LDPE is 1.0-2.5 g / 10min), drying and mixing pretreatment, melting and plasticizing through a twin-screw extruder, injection of foaming agents such as butane under the pressure of 8-12MPa, extrusion foaming at a die head of 140-160 DEG C and combination of air-cooling and water-cooling shaping. The compounding link comprises multiple processes such as hot pressing and co-extrusion to adapt to different base materials, after-treatment is conducted through trimming, taper tension coiling and standing stress release, the product density fluctuation is + / -3%, and the peel strength is larger than or equal to 3 N / cm. According to the waste gas recovery system, negative pressure collection is conducted through a closed gas collecting hood, indirect cooling and alkali liquor spraying pretreatment are conducted, activated carbon adsorption concentration and catalytic combustion purification are conducted, the VOCs removal rate is larger than or equal to 98%, the emission concentration is smaller than or equal to 50 mg / m < 3 >, and efficient production and environmental protection benefits are achieved.

The invention relates to the technical field of industrial waste gas treatment, in particular to industrial waste gas catalytic combustion equipment which comprises a box and a fastening supporting unit. A heating assembly is arranged at the lower end in the box body, a sliding seat is arranged in the middle of the box body, a catalyst box is slidably connected to the middle of the sliding seat, the front end of the catalyst box extends out of the front side face of the box body, a first heat exchange unit and a second heat exchange unit are sequentially arranged at the upper end in the box body from bottom to top, and the lower end of the second heat exchange unit communicates with the upper end of the first heat exchange unit. An air guide pipe is arranged at the lower end of the heat exchange unit I; the lower end of the air guide pipe extends to the lower end in the box body; the fastening and supporting unit is used for locking the catalyst box and supporting the catalyst box after the catalyst box is pulled out. According to the industrial waste gas catalytic combustion equipment, heat exchange is conducted on industrial waste gas before and after treatment through a two-stage heat exchange structure, and industrial waste gas catalytic combustion use convenience is good.

The invention discloses a compound for flue gas deoxidation and a flue gas deoxidation method, and relates to the technical field of flue gas treatment for preventing spontaneous combustion injection of residual coal in a goaf. The compound comprises coal semicoke and a composite metal oxide which are mixed, wherein the composite metal oxide comprises CoO and CuO in a mass ratio of 7: (2.5-3.5); the compound is combusted through a fixed bed, and flue gas generated by combustion is deoxidized; when the coal semicoke is used for catalytic combustion deoxidation, CoO and CuO in a certain proportion are added, so that the oxygen consumption rate is high, the CO generation amount and the CO concentration are low, the ignition point is reduced, and the comprehensive effect is good; the problem that the concentration of O2 and the concentration of CO in the flue gas are too high when the flue gas is injected into an underground goaf is solved.