1289 results about "Sulfur dioxide" patented technology

A process system and process method for treating hydrogen sulfide-containing acid gas. The process system comprises a sulfur recovery unit, a tail gas treatment unit having an acid gas concentration function, and a flue gas alkaline scrubbing unit. The method comprises: subjecting sulfur-containing tail gas to concentration treatment by means of an absorption column (1) of the tail gas treatment unit, and then introducing same into the sulfur recovery unit to undergo a Claus reaction for separation, so as to obtain sulfur and sulfur recovery tail gas; introducing the sulfur recovery tail gas into the tail gas treatment unit, successively carrying out combustion and hydrotreating, and introducing the obtained gas into the absorption column (1) of the tail gas treatment unit; and in the tail gas treatment unit, introducing gas absorbed by the absorption column (1) into the flue gas alkaline scrubbing unit, and successively carrying out incineration and alkaline scrubbing, so as to discharge desulfurized gas. The content of SO2 in the tail gas treated by the process system is ≤50 mg / Nm3, and the requirements for full-period standard reaching of sulfur dioxide emission of tail gas during startup, shutdown and normal operations can be satisfied.

The invention belongs to the technical field of adsorbent preparation, and relates to a preparation method of a series of M-TCBB metal organic framework materials and application of the M-TCBB metal organic framework materials to adsorption of sulfur dioxide and ammonia gas. The preparation method comprises the following steps: dispersing [9, 9 '-dicarbazole]-3, 3', 6, 6 '-tetracarboxylic acid (H4TCBB) serving as an organic ligand and any one or more of yttrium salt, zirconium salt, hafnium salt, cerium salt and thorium salt in a solution according to a certain mass ratio, and carrying out solvothermal reaction at 100-120 DEG C; and after the reaction is finished, centrifuging to take a precipitate, washing and drying to obtain a series of M-TCBB metal organic framework materials. The series of M-TCBB metal organic framework materials prepared by the invention have relatively good adsorption acting force on sulfur dioxide and ammonia gas, and are high in adsorption cycle stability; under a humid condition, capture of sulfur dioxide and ammonia gas shows a humidity enhancement characteristic, namely, water vapor promotes enhancement of the adsorption capacity of sulfur dioxide and ammonia gas.

The invention provides an ammonium sulfate production process control method based on model prediction, which comprises the following steps: acquiring real-time data of flue gas flow, sulfur dioxide concentration, slurry PH value and ammonia water concentration, analyzing dynamic change characteristics of the flue gas flow, the sulfur dioxide concentration, the slurry PH value and the ammonia water concentration under different coal types and load working conditions, and constructing a flue gas component mutation characteristic library; transmitting an ammonia water adding amount and / or material transfer pump rotating speed control instruction to a desulfurization tower control system, executing dynamic adjustment of an absorption circulating tank, updating real-time monitoring data, comparing output prediction results, calculating deviation, and generating an optimized future prediction sequence; and judging whether the pH value and the ammonium sulfate concentration of the absorption circulating tank can continuously meet the preset upper and lower limit range conditions in the future preset time or not by comparing the prediction result sequences before and after optimization, if so, completing a dynamic adjustment period, and if not, recalculating the adjustment value of the ammonia water addition amount and / or the rotating speed of the material transfer pump.

The invention discloses an all-component comprehensive utilization method for leaching residues of a laterite-nickel ore high-pressure acid leaching process, and belongs to the technical field of solid waste resource utilization. The method comprises the following steps: granulating and sintering the iron-containing slag of the laterite-nickel ore high-pressure acid leaching process and raw materials containing coke powder, a flux and return mine to obtain sintered ore and sulfur dioxide flue gas; sulfur dioxide is used for preparing sulfuric acid and returned to the laterite-nickel ore high-pressure acid leaching procedure; smelting the sintered ore, coke and a slag modifier through a blast furnace to obtain molten iron and slag; the molten slag is subjected to cold quenching, and granulated molten slag is obtained; and after being ground, part of the granulated slag is mixed with the granulated slag and auxiliary materials containing an alkali activator and tailings in the laterite-nickel ore high-pressure acid leaching process to serve as a backfill material. By means of the method, low-consumption, efficient and large-scale all-component comprehensive utilization of the leaching residues of the laterite-nickel ore high-pressure acid leaching process can be achieved, 100% resource utilization of the residues is completed, and the method has considerable industrial popularization potential.

The invention discloses an instrument for detecting sulfur dioxide residue in traditional Chinese medicine, and relates to the technical field of traditional Chinese medicine detection, the instrument comprises a main machine, and also comprises a distillation flask arranged at the top of the main machine and used for containing a sample to be detected; the condensation assembly is arranged at the top of the distillation flask and comprises a condensation pipe and a sleeve, and the sleeve is fixedly arranged in the condensation pipe and divides the condensation pipe into a water passing cavity and a condensation cavity. The condensation cavity is divided into the upper condensation section and the lower condensation section through the separation part, heat can be effectively prevented from spreading to the whole condensation cavity, a certain temperature difference is kept between the upper condensation section and the lower condensation section, it is ensured that gas subjected to primary condensation can be effectively condensed on the upper condensation section, and therefore the condensation effect on distilled gas is improved; the hydrochloric acid component doped in the gas can be further reduced through twice condensation, the hydrochloric acid component is prevented from entering the absorption bottle along with nitrogen and sulfur dioxide to influence the absorption liquid, and the detection accuracy is improved.

The invention relates to the technical field of coal-fired power plant environmental protection, in particular to a coal-fired power plant intelligent environmental protection island control system based on multi-source data fusion. Comprising a multi-source data acquisition module, a data transmission module, a data preprocessing module, a multi-source data fusion module, an operation state analysis module, an intelligent control decision module, a control instruction execution module and a man-machine interaction module. According to the coal-fired power plant intelligent environmental protection island control system based on multi-source data fusion, equipment operation, environmental monitoring, power grid, fuel and meteorological data are widely acquired through the multi-source data acquisition module, the limitation of a single data source of a traditional system is broken through, a distributed Kalman filtering algorithm is combined with a neural network algorithm for data fusion, and the data fusion efficiency is improved. According to the method, the incidence relation between data can be deeply mined, temperature and pressure parameters of desulfurization equipment and flue gas sulfur dioxide concentration data are subjected to fusion analysis, the reason of desulfurization efficiency reduction can be accurately positioned, and compared with traditional single data source judgment, the fault diagnosis accuracy is improved.

This invention belongs to the field of catalyst technology, specifically relating to a selective reduction catalyst for the production of sulfur from sulfur dioxide and its application method. The selective reduction catalyst for sulfur production from sulfur dioxide contains 1-2 wt% cobalt (CoO), 4-10 wt% molybdenum (MoO3), and 2-4 wt% zinc (ZnO), with TiO2-Al2O3 as the support. This invention exhibits good wide-temperature reaction performance, heat resistance, and water vapor resistance; the single-pass yield of elemental sulfur is higher than 80%, and the reaction process has high efficiency, showing promising application prospects.

The invention belongs to the technical field of preparation of sulfur, and particularly relates to a process for producing sulfur from sulfur dioxide. The SO2 introduced by the sulfur dioxide gas flow is selectively reduced into elemental sulfur by using hydrogen introduced by the hydrogen flow under the temperature condition of 160-320 DEG C through one or more reaction devices; each reaction device is provided with one or more selective reduction reactors which are connected in series, one or more catalyst bed layers are arranged in each selective reduction reactor, and each catalyst bed layer is filled with a selective reduction catalyst. The method is simple in process reaction, short in flow and high in efficiency, products except sulfur are water or basically water, and the method has a certain application prospect.

The invention belongs to the technical field of dangerous solid waste resource recovery in the nonferrous smelting industry, and discloses a method for recovering arsenic trioxide by leaching arsenic sulfide slag from ferrihydrite. The arsenic sulfide slag is leached by ferrihydrite in an acid solution under the normal pressure condition, so that the leaching rate of arsenic in the arsenic sulfide slag is increased; and sulfur dioxide gas is introduced into the leachate to reduce arsenic in the solution, finally arsenic trioxide is obtained through evaporation concentration and cooling crystallization, meanwhile, oxygen is introduced into the crystallized liquid to oxidize and recycle iron, and cyclic utilization of resources is achieved. The method has the characteristics of simplicity and convenience in operation, low cost, safety, reliability and the like, the arsenic sulfide slag can be effectively recycled to prepare the arsenic trioxide product, and the purpose of treating waste with waste is achieved.

The invention relates to the technical field of flue gas emission, and discloses an alkali furnace ultra-clean emission device with a phase change filling layer linked with a desulfurizing tower, the alkali furnace ultra-clean emission device comprises a tower body, the tower body comprises an upper tower, a middle tower and a lower tower, the inner wall of the upper tower is fixedly connected with a spraying assembly, the inner wall of the middle tower is slidably connected with a filling part, and the spraying assembly is fixedly connected with the spraying assembly. An air inlet is formed in the outer surface of the circumference of the lower tower; the filling part comprises a plurality of lifting rods located at the same height, and the multiple lifting rods are slidably connected to the inner wall of the middle tower. The alkali furnace ultra-clean discharge device with the phase change filling layer and the desulfurization tower linked can effectively solve the problems that in the prior art, precipitated sulfur is prone to adhering to the surface of the filler, the original porous structure is blocked by a compact sulfur layer along with more and more sulfur adhering to the surface of the filler, the actual contact area of gas and liquid phases is greatly reduced, and the service life of the gas and liquid phases is prolonged. The reduction of the contact area can directly weaken the absorption efficiency of the sulfur dioxide, and the concentration of the sulfur dioxide exceeds the standard.

The invention relates to a device and a method of a high-sensitivity suspension single-droplet sensor for monitoring PM2.5 pollution, belongs to the technical field of aerosol microdroplet spectrum trace analysis, and solves the problem that ppb-magnitude gas cannot be monitored in the prior art. The method comprises the following steps: pumping aerosol into a sample cell of a droplet suspension system in a single droplet form; introducing required reaction gas into the sample pool through an atmosphere control system; scattered light signals of the single liquid drops are respectively input into the dynamic signal processing system and the microdroplet imaging system; acquiring the characteristic peak displacement change of the metal ion sensing microdroplet; establishing a gas particle distribution Mie scattering inversion model based on micro-droplet dynamic response; inverting the radius of the liquid drop according to the stimulated Raman scattering / stimulated elastic scattering signal; according to the quantitative relationship of the reaction, calculating the generation of sulfate by the droplet suspension system (sensor); and judging which gas in the actual atmosphere is a main oxidation pathway for oxidizing sulfur dioxide to generate sulfate pollutants according to a calculation result.

The invention discloses a sampling device for detecting the content of sulfur dioxide in flue gas of a flue gas tower. The sulfur dioxide detection device comprises a box body, a lifting mechanism and a lifting box, the box body is arranged in the flue gas tower; a first through hole and a second through hole are formed in the outer wall of the box body, and plugging assemblies are mounted in the first through hole and the second through hole; two sampling assemblies are installed in the lifting box, the lifting box is slidably connected into the box body in the vertical direction through a lifting mechanism, and the lifting mechanism comprises a motor, a first gear, a second gear, a lead screw and a sliding rod; the lead screw is rotationally connected into the box body, the rotating axis is arranged in the vertical direction, the sliding rod is fixedly arranged in the box body, the lifting box is slidably connected with the sliding rod, and the lifting box is connected with the lead screw through a lead screw nut; the motor drives the screw rod to rotate; according to the flue gas sampling device, flue gas at the top and the bottom can be sampled in sequence from top to bottom, meanwhile, automatic connection and blocking can be formed, flue gas at different positions can be sampled, data at different positions can be conveniently compared in the later period, it is guaranteed that sampled gas is purer, and the phenomenon that the gas is disorderly mixed in the box body can be avoided.

The present invention provides a ship exhaust gas desulfurization device and a desulfurization method, which include a sulfur-containing ship exhaust gas pretreatment system, a seawater pretreatment system, a membrane contactor, and a seawater post-treatment system; the outlet end of the sulfur-containing ship exhaust gas pretreatment system is connected to the shell-side inlet end of the membrane contactor for sending the dust- and oil-removed exhaust gas into the shell side of the membrane contactor; the outlet end of the seawater pretreatment system is connected to the tube-side inlet end of the membrane contactor for sending the pretreated seawater into the tube side of the membrane contactor; the membrane contactor is a membrane contactor filled with polytetrafluoroethylene hollow fiber hydrophobic microporous membranes; the inlet end of the seawater post-treatment system is connected to the tube-side outlet end of the membrane contactor for post-treating the seawater after absorbing sulfur dioxide and oxidizing sulfite into sulfate. The ship exhaust gas desulfurization device described in the present invention has a high integration degree, a compact volume, and a high desulfurization efficiency, can achieve efficient desulfurization of ship exhaust gas, and has good application prospects.

The invention relates to the technical field of boiler control and environmental protection, and discloses a control method for continuously monitoring biomass boiler flue gas, which comprises the following steps: S1, collecting the concentration data of pollutants in the biomass boiler flue gas in real time, the pollutants including carbon monoxide, carbon dioxide, nitrogen oxide and sulfur dioxide; s2, the collected pollutant concentration data are transmitted to a data processing module, the control system for continuously monitoring the biomass boiler flue gas is further provided and used for executing the control method for continuously monitoring the biomass boiler flue gas, and the control system comprises a data collection module, a data processing module and a data processing module, the sensor array is used for collecting temperature, pressure and pollutant concentration data in boiler flue gas in real time through the sensor array. According to the method, real-time data and an optimization algorithm are combined, the pollutant concentration is predicted through Kalman filtering denoising and a multi-factor mathematical model, boiler operation parameters are dynamically adjusted, the energy efficiency is improved, pollutant emission is reduced, and the problems of inaccurate control and slow response in the traditional technology are solved.

The invention provides an ozone flue gas denitration device and a denitration method thereof, and belongs to the technical field of flue gas denitration. The ozone flue gas denitration device comprises a denitration tank, a gas inlet pipe and an exhaust pipe, the gas inlet pipe and the exhaust pipe are installed on the side wall of the denitration tank, a pretreatment mechanism is installed in the denitration tank, and the pretreatment mechanism comprises a spray pipe, a filter plate and a rotating seat. By arranging the pretreatment mechanism, an alkaline solution can be injected into a spray pipe through a water pump and is sprayed into flue gas through a spray head, particle impurities in the flue gas are removed, acid gas such as sulfur dioxide in the flue gas can be effectively removed, the flue gas is humidified, favorable conditions are provided for a subsequent ozone reaction, and in the spraying process, the treatment efficiency is improved. The temperature of the flue gas is reduced while the humidity is increased, so that the reaction efficiency of ozone is improved, then a rotating seat and a scraper blade are driven by a first rotating shaft to rotate, and under the action of centrifugal force, particle impurities attached to the surface of a filter plate are thrown into a collecting bin to be collected, so that the device is convenient to use.

The invention belongs to the technical field of catalysts, and particularly relates to a selective reduction catalyst for preparing sulfur from sulfur dioxide and an application method of the selective reduction catalyst. The selective reduction catalyst for preparing sulfur from sulfur dioxide contains 1-2wt% of cobalt (in terms of CoO), 4-10wt% of molybdenum (in terms of MoO3) and 2-4wt% of zinc (in terms of ZnO), and a carrier is TiO2-Al2O3. The method has good wide-temperature reaction performance, heat resistance and water vapor resistance, the single-pass yield of elemental sulfur is higher than 80%, the efficiency of the reaction process is high, and the method has good application prospects.

The invention discloses a coal bunker mixed gas concentration detection method based on a BSA algorithm and a BP neural network, and belongs to the technical field of gas detection. The coal bunker mixed gas concentration detection method based on the BSA algorithm and the BP neural network comprises the following steps: collecting gases including carbon monoxide, nitrogen dioxide, sulfur dioxide, hydrogen sulfide and methane, and constructing the BP neural network by taking normalized gas data as an input layer; and optimizing BP neural network parameters by using a BSA bird flock algorithm, carrying out network training by using a back propagation algorithm, and inputting gas concentration data collected in real time into the trained neural network in real time to obtain a predicted value of the gas concentration. According to the method, the parameters of the BP neural network are optimized through the BSA algorithm, the accuracy of network prediction is greatly improved, the gas concentration in the coal storage bunker can be monitored in real time, and once it is detected that the hazardous gas concentration exceeds the standard, quick response can be made and corresponding measures can be taken, so that potential safety risks are reduced.

The invention discloses a physicochemical index detection method for canned food production, and relates to the technical field of food detection, and the method comprises the following steps: deploying annularly arranged near infrared spectrum, eddy current electromagnetic and biological impedance three-mode sensing units, and collecting tank reflection spectrum, eddy current loss and complex impedance response signals in a non-contact manner; extracting characteristic parameters of sulfur dioxide, heavy metals and microorganisms through wavelet packet decomposition, Hilbert transform and principal component analysis; constructing a ternary coupling correction equation set to perform cross correction on the original data, and outputting an accurate detection result; and a self-calibration mechanism and an abnormal product automatic sorting function are integrated. By constructing four core technology systems of multi-modal synchronous acquisition, cross-modal feature coupling, dynamic threshold decision and online self-calibration, lossless, efficient and multi-index parallel detection is realized, the precision is stable, the cost is reduced by 60%, and the real-time quality control and tracing requirements of a full-automatic production line are met.

The invention relates to the technical field of industrial waste gas treatment, in particular to a waste gas treatment system and method based on wet desulphurization. The system comprises a waste gas pretreatment unit, a composite absorption reaction unit, a gas-liquid separation unit, an absorption liquid circulation system, an intelligent control system and a waste liquid treatment unit, wherein each unit is communicated with a shielding signal line through a corrosion-resistant pipeline to form a closed-loop operation system; industrial waste gas is subjected to pre-dedusting and cooling through the waste gas pretreatment unit and then enters the composite absorption reaction unit to be in countercurrent contact with a composite absorbent to achieve sulfur dioxide removal, a gas-liquid mixture obtained after reaction is separated through the gas-liquid separation unit, purified gas is directly discharged, and absorption liquid enters the absorption liquid circulation system to be recycled. And the saturated absorption liquid with the density of 1.15-1.25 g / cm < 3 > is conveyed to a waste liquid treatment unit for treatment. According to the invention, sulfur dioxide in waste gas can be efficiently removed through synergistic absorption and intelligent control, the operation cost is reduced, and equipment corrosion is reduced.

The invention relates to the technical field of atmospheric science and remote sensing, in particular to a volcanic sulfur dioxide vertical section inversion method based on a Lagrange diffusion model, and the method comprises the steps: obtaining volcanic eruption total mass constraint, satellite sulfur dioxide column concentration and effective pixels, three-dimensional meteorological driving data and chemical clearing parameters; calculating a vertical weighting function by utilizing a radiation transmission mode, and generating initial vertical distribution by combining with a column concentration layering ratio; constructing a diffusion model to simulate an air mass backward track and match observation pixels to obtain attribution air mass distribution; optimizing a volcanic sulfur dioxide vertical emission profile time sequence based on attribution distribution and total mass constraint; and inputting the sequence into a diffusion model for forward simulation, comparing satellite observation data to calculate a verification index, correcting a diffusion coefficient according to a threshold value, and outputting a target vertical emission profile time sequence. According to the method, through backward trajectory attribution and forward verification closed-loop optimization, the volcanic sulfur dioxide vertical distribution inversion precision is remarkably improved.

The invention relates to the technical field of automobile air purification, and particularly discloses a filtering material, a preparation method of the filtering material and a novel automobile air conditioner multi-effect catalytic formaldehyde removal filter. The filtering material comprises a PET (Polyethylene Terephthalate) supporting layer, a gas filtering layer and a PP (Polypropylene) electrostatic filtering layer which are arranged in sequence, the gas filtering layer is prepared from the following raw materials in parts by weight: 30 to 90 parts of activated carbon and 10 to 70 parts of manganese catalyst. The gas filtering layer composed of the activated carbon and the manganese catalyst is matched with the filtering material composed of the PET supporting layer and the PP electrostatic filtering layer, four gases of n-butane, methylbenzene, sulfur dioxide and nitrogen dioxide can be adsorbed, the manganese catalyst degrades formaldehyde at normal temperature, meanwhile, the reaction on the formaldehyde is a catalytic reaction, and the environment-friendly effect is achieved. Therefore, the filter material disclosed by the invention also has longer service life, so that a filter made of the filter material has a better formaldehyde removal effect and longer service life.

The invention relates to a gas discharge detection method, system and equipment based on an ultraviolet spectrum and a medium. The method comprises the following steps: transmitting a frequency-modulated ultraviolet light beam to a gas chamber to be detected, synchronously collecting and processing a transmission light signal in a branching manner, and simultaneously obtaining a modulated spectrum signal for gas absorption analysis and a discrete photon pulse signal for detecting a discharge event; respectively processing the two paths of signals, and extracting sulfur dioxide concentration information and photon radiation characteristics; fusing the two types of features to construct a dynamic feature vector, and obtaining a discharge state grade by using a dynamic Bayesian network diagnosis model; and finally, combining the concentration and state information, and outputting the membership degree of the discharge duration through fuzzy logic. By adopting the method, the fast process and the slow process of partial discharge can be cooperatively monitored, and the early detection sensitivity and the diagnosis reliability are improved.

A panoramic scanning coal fire detection and disaster early-warning, prevention and control apparatus for a mining area, the apparatus comprising a detection apparatus, a laser scanning apparatus, a satellite remote-sensing monitoring apparatus, a data processing and analysis system, and an early-warning, prevention and control apparatus. High-precision thermistor temperature sensors (1) are arranged inside, on the surface and in surrounding areas of coal piles, such that subtle changes in the temperature of the coal piles can be accurately captured, and early-stage potential coal fire hazards can be effectively detected; gas sensors (2) installed at vents of a mining area can simultaneously measure the concentrations of gases such as carbon monoxide, carbon dioxide, methane and sulfur dioxide, so as to promptly identify anomalies in gas composition that are caused by coal fire combustion; an infrared thermal imager (3), which is located at a high position to acquire a panoramic view of the mining area, can clearly display high-temperature regions; and cameras (4) provide high-definition, wide-angle and low-illumination visual monitoring, and various sensors comprehensively collect data from different dimensions, thereby greatly improving the accuracy and comprehensiveness of monitoring.

The system comprises a mixed gas pipeline, a heat exchanger a, a heat exchanger b, a heat exchanger c and a multi-stage refrigerating unit, the heat exchanger a, the heat exchanger b and the heat exchanger c are sequentially connected in series, the multi-stage refrigerating unit feeds cold media into the heat exchanger a, the heat exchanger b and the heat exchanger c for heat exchange, and the mixed gas pipeline is communicated with the heat exchanger a; and the output ends of the heat exchanger a, the heat exchanger b and the heat exchanger c are respectively provided with a gas-liquid separation tank a, a gas-liquid separation tank b and a gas-liquid separation tank c. According to the system and the method for separating and purifying the ammonium sulfate in the electrolytic manganese residues, gaseous sulfuric acid, sulfur dioxide, ammonia gas and nitrogen in mixed gas are respectively condensed and gradually recovered by utilizing the characteristic that the boiling points of the gaseous sulfuric acid, the sulfur dioxide, the ammonia gas and the nitrogen are different, components are used for recovering the ammonium sulfate and the nitrogen, and the sulfur dioxide is separated out; the ammonium sulfate recovery efficiency reduction caused by sulfur dioxide influence is avoided.

The invention relates to the technical field of chemical plant smoke filtering, in particular to a chemical plant discharge filtering device with a monitoring function, which comprises a barrel, a gas inlet pipe, a gas outlet pipe and the like, the barrel is communicated with the gas inlet pipe, and the top of the barrel is communicated with the gas outlet pipe. Indexes of pollutants such as sulfur dioxide, nitric oxide, carbon monoxide and carbon dioxide in flue gas can be detected through the flue gas sensor, when the flue gas sensor detects that the pollutants in the flue gas exceed the standard, the controller can control an electric guide rail to work, the electric guide rail drives a first push plate to move forwards, and a first sealing plate can also move forwards; the first sealing plate seals the exhaust pipe, real-time response can be achieved after the filter element is aged and breaks down, the filter element is replaced without shutdown under the condition that it is ensured that smoke does not leak, smoke which is not completely purified is prevented from being exhausted out, and therefore pollution to the environment can be avoided.

The invention discloses a method for preparing composite calcium ferrite from phosphogypsum and calcium-process vanadium extraction tailings, and belongs to the technical field of metallurgy. The invention relates to a method for preparing composite calcium ferrite from ardealite and calcium-process vanadium extraction tailings. The method comprises the following steps: drying the ardealite and the calcium-process vanadium extraction tailings; uniformly mixing and grinding the dried material and carbon-containing reducing agent powder to obtain a mixed and ground material; adding water into the mixed and ground material, pressing the mixed and ground material into material ball blocks, and drying the material ball blocks under preset conditions; placing the dried material ball block in a reactor for calcining, and cooling to obtain a sample which is composite calcium ferrite in the reaction container; according to the method, sulfur in the ardealite and the vanadium extraction tailings is removed in the form of sulfur dioxide at high temperature through external carbon, the removal rate of sulfur reaches 95% or above, calcium ferrite with the effective content being 50% or above and a small part of sulfur dioxide flue gas in the prepared composite calcium ferrite are prepared, and calcium, sulfur and iron resources in the ardealite and the vanadium extraction tailings can be fully recycled.

The invention discloses an ardealite resource comprehensive utilization method and application thereof, and belongs to the technical field of ardealite resource utilization. The method comprises the following steps: S1, mixing ardealite and a reducing agent to obtain a mixture; s2, performing high-temperature decomposition treatment on the mixture in an inert atmosphere to obtain decomposed gas and a decomposed product; s3, sulfuric acid and / or carbon disulfide are / is prepared with the decomposition gas as the raw material, and the decomposition product is used for metallurgical steelmaking; according to the method, ferrous sulfide is used as a reducing agent, under the inert atmosphere, phosphogypsum is reduced into calcium oxide and calcium ferrite, generated sulfur dioxide tail gas is recycled, and comprehensive utilization of calcium and sulfur resources of phosphogypsum solid waste is achieved; the recycled sulfur dioxide can be used for preparing sulfuric acid and / or carbon disulfide, meanwhile, calcium oxide and calcium ferrite can serve as an adhesive and a slag former to be used for efficient metallurgical steelmaking, and the comprehensive utilization method for ardealite resources has a good application prospect.

According to the graphitization furnace flue gas desulfurization system and method, the mixer and the desulfurization slurry storage tank are arranged, desulfurization slurry in the desulfurization slurry storage tank is pumped into the mixer through the liquid transfer pump to be mixed with flue gas output by the graphitization furnace, sulfur dioxide in the flue gas is absorbed, and meanwhile the desulfurization slurry is discharged through the liquid transfer pump. Drying the desulfurized slurry by using the heat of the flue gas, and reducing the temperature of the flue gas; meanwhile, the dust remover is used for removing dust of the flue gas and then introducing the flue gas into the gas washing device for washing. The device disclosed by the invention is matched with the devices for use, so that the wastewater output in the gas washing process can be effectively reduced, and the treatment cost of an enterprise is reduced. In addition, the flue gas is desulfurized by the desulfurization slurry and desulfurized by the gas washing device through the mixer, so that the consumption of absorption liquid in the gas washing device is saved, and the desulfurization effect can be improved by combining the desulfurization slurry and the gas washing device.

A process for stabilizing nutrients in anaerobic digestate involves removing hydrogen sulfide and ammonia from biogas. This process involves circulating the digestate in a column and contacting it with the biogas. Additional ammonium bisulfite, ammonia, and / or sulfur dioxide may be added to the contacting device to remove hydrogen sulfide from the biogas. The reactions will create ammonium bisulfite, ammonium sulfite, and ammonium thiosulfate to prevent ammonia and hydrogen sulfide emissions to allow for land application.

The invention provides an alcohol-based automotive clean fuel and a preparation method thereof. The alcohol-based fuel comprises the following components in parts by weight: 60-90 parts of methanol, 2-10 parts of ethanol, 1-5 parts of multi-carbon alcohol, 5-15 parts of aliphatic ether, 0.2-2 parts of a catalyst, 2-6 parts of peroxide and 1-3 parts of a corrosion inhibitor. The alcohol-based fuel prepared by the invention has a relatively high octane number, which shows that the anti-knock property is good, and knock is not easy to occur when the alcohol-based fuel is used in an engine; the sulfur content is relatively low, so that the corrosion to engine parts can be reduced, the emission of sulfur dioxide is reduced, and the environmental pollution is reduced; the density is relatively high, so that the combustion heat value can be improved, and the stability in the storage and transportation processes is higher; the copper sheet corrosion grade is low, which shows that the corrosion to metal is low; compared with the prior art, the alcohol-based fuel has low emission of HC, CO and NOx, which indicates that the alcohol-based fuel is greener and cleaner, and the raw materials such as methanol and ethanol can be prepared from renewable resources such as wood chips, corncobs, cereals and straws, so that the requirement of sustainable development is met.