997 results about "Sulfur dioxide" patented technology

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 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 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 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 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 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.

The invention discloses an intelligent monitoring system of a desulfurization absorption tower, which relates to the technical field of desulfurization absorption tower monitoring and comprises a data acquisition unit, an operation analysis unit, a desulfurization analysis unit, a comprehensive analysis unit and an abnormal alarm unit, through comprehensive evaluation of the pH value, chloride ion concentration and sulfite concentration of the slurry, desulfurization reaction effectiveness can be quantified, and dynamic adjustment of limestone dosage can be guided, so that desulfurization process parameters are optimized, the service life of the slurry is prolonged, and by fusing a stable operation index, a desulfurization reaction index and sulfur dioxide absorption data, the desulfurization efficiency is improved. The comprehensive absorption index model of the desulfurization absorption tower is constructed, global evaluation of the desulfurization efficiency is realized, the accuracy of the monitoring result is improved, the limitation of traditional single index evaluation is avoided through multi-factor correlation analysis, and finally, through the real-time early warning function of the abnormity alarm unit, the safety of the desulfurization absorption tower is improved. When the desulfurization system is unstable in operation or low in absorption efficiency, a worker can be quickly notified to intervene.

The invention belongs to the technical field of metallurgy, and relates to a method for comprehensively recovering valuable elements from nonferrous smelting waste acid, which comprises the following steps: S1, mixing the waste acid with pyrrhotite, reacting in a sulfur dioxide atmosphere, and after the reaction, carrying out solid-liquid separation to obtain copper slag and copper removal liquid; and S2, H2S gas is introduced into the copper removal liquid obtained in the step S1, and after reaction, arsenic sulfide slag and arsenic removal liquid are obtained through solid-liquid separation. According to the method, FeS in the pyrrhotite selectively reacts with CuSO4 in the waste acid to generate indissolvable copper sulphide precipitates, meanwhile, under the protection of the sulfur dioxide atmosphere, the arsenic element in the waste acid is kept in a dissolved state and does not precipitate, the copper and arsenic elements in the waste acid can be effectively separated through the synergistic effect of the FeS and the CuSO4, and the separation steps are simple and efficient.

The invention relates to the technical field of flue gas treatment, in particular to a device for removing sulfur dioxide in flue gas. Comprising a tower body, the lower end of the tower body fixedly communicates with an air inlet pipe, the air inlet pipe is provided with a flow sensor, the upper end of the tower body fixedly communicates with an air outlet pipe, second side plates are fixed to the front side and the rear side in the tower body, and two first side plates are arranged between the two second side plates and connected with the tower body through electric telescopic rods; a spraying assembly is arranged at the central position in the upper end of the treatment cavity, and the spraying assembly is communicated with the liquid inlet flow control assembly. According to the invention, the two first side plates synchronously move towards each other or away from each other, so that the circulation cross-sectional area of the treatment cavity is changed in real time. When the flue gas flow is reduced, the cross section is reduced, the flue gas and the atomized treating fluid are forced to fill the cavity, and the effective contact area of the atomized treating fluid and the flue gas is ensured; when the flow is increased, the cross section is enlarged, the gas flow rate is reduced, and the reaction time of flue gas and atomized treating fluid is prolonged.

The invention provides a desulfurization device for improving flue gas purification efficiency and an operation method of the desulfurization device. A flue gas blending flue, a flue gas blocking valve and a gas exchange device are utilized to construct a dual-system flue gas dynamic blending mechanism; when the desulfurization efficiency of any system is reduced and the pollutant emission exceeds the standard due to the fact that the slurry circulating pump is overhauled and stopped, the slurry quality is poor, the sulfur content at the inlet exceeds the standard and the like, the control system can automatically open the corresponding flue gas blocking valve and the gas exchange device according to the real-time data of the online flue gas measuring instrument, and the flue gas of the standard-exceeding system is conveyed to the standard-reaching system to be treated; and the flue gas load dynamic balance between the double systems is realized. The design effectively solves the problem that a single wet flue gas desulfurization system is insufficient in treatment capacity under the working conditions of equipment abnormity, slurry performance fluctuation or sudden sulfur content change and the like, the overall flue gas purification efficiency is remarkably improved through cooperation and complementation of the double systems, stable up-to-standard emission of pollutants such as sulfur dioxide and the like is ensured, and the economic benefit is increased. And the method has high adaptability and operation reliability for coping with complex working conditions.

The application discloses a zinc extraction process from secondary zinc oxide, and belongs to the technical field of zinc oxide preparation. In the rotary kiln roasting, composite porous flaky reducing carbon with waste paper, rice husk and wooden chips as main raw materials is used as a reducing agent. Compared with the commercially available anthracite, the composite porous flaky reducing carbon has low cost, realizes resource recycling, and has a large specific surface area and porous properties. A multi-level structure of flaky layers and pores is constructed, so that the contact sites of the composite porous flaky reducing carbon and the secondary zinc oxide are increased. The porous structure can avoid the caking of the material layer caused by the stacking and agglomeration of the flaky layers, and avoid the obstruction of gas flow, so that the pain points of the traditional reducing agent, such as local agglomeration and insufficient contact, are solved. The surface of the composite porous flaky reducing carbon is deposited with calcium oxide. The presence of the calcium oxide can react with a small amount of sulfur elements generated in the rotary kiln roasting process of the composite porous flaky reducing carbon, so as to generate calcium sulfate and reduce the content of sulfur dioxide.

The utility model discloses a smoke imaging device fusing ultraviolet ray and visible light, which comprises an ultraviolet detection module, a visible light detection module and a signal control module, the ultraviolet detection module comprises an ultraviolet telephoto lens, a shading cylinder, an ultraviolet camera and an optical filter device, and the shading cylinder is arranged at the front end of the ultraviolet telephoto lens; the visible light detection module comprises a visible light telephoto lens matched with the ultraviolet telephoto lens and a visible light camera; the visible light detection module is located on one side of the ultraviolet detection module so that ultraviolet light and visible light can be in the same view field. And the signal control module is respectively connected with the ultraviolet detection module and the visible light detection module and is used for receiving information and processing data. The scheme provided by the utility model can solve the problems of poor portability, poor sensitivity, complex operation, limited precision, high cost, short detection distance and the like of the existing technology for monitoring pollutants such as sulfur dioxide, nitrogen oxide and the like, and has great application prospects and social significance.

The technology includes a method for removing sulfur dioxide (SO2) from a gas stream, where SO2 gas is contacted by a diluted sulfuric acid (H2SO4) stream and absorption takes place in a quench tower. The dissolved SO2 reacts with the excess of oxygen in the gas stream, where the oxidation results in the formation of sulfurous acid (H2SO3) and dilute H2SO4. For the complete oxidation of the dissolved SO2, an electrolyzer and / or liquid injectants are used. This results in the formation of diluted H2SO4. The diluted H2SO4 is processed in an enrichment unit to produce concentrated H2SO4 and fresh water. A portion of the diluted H2SO4 and / or fresh water is recycled back to the quench tower for the continued acidic absorption of the incoming SO2 in the gas stream, thereby not relying on an external water source.

The invention discloses a method for intelligently controlling sulfur dioxide emission in a circulating fluidized bed flue gas desulfurization process. The method at least comprises the following steps: 1) automatically controlling the outlet temperature of the desulfurizing tower; (2) intelligently controlling the bed pressure drop of the desulfurizing tower; and (3) intelligently controlling the emission concentration of SO2. Wherein 1) the step of automatically controlling the temperature of the outlet of the desulfurizing tower is realized by automatically adjusting a backflow adjusting valve of a process water system, and 2) the step of intelligently controlling the pressure drop of the bed of the desulfurizing tower is realized by intelligently adjusting a material returning adjusting valve. According to the method, multi-factor controlled desulfurization emission is subjected to hierarchical control and system interlocking, all factors are automatically controlled, production parameters are optimized through interlocking of all the factors, and finally the purpose of multi-factor intelligent control over SO2 emission is achieved.

The invention relates to the technical field of chemical raw material preparation, and discloses a process and equipment for preparing liquid sulfur dioxide through pure oxygen incineration, the system deeply couples dynamic optimization of three high-energy-consumption links of waste heat recovery, combustion reaction and deep freezing through hardware collaboration and algorithm innovation, and compared with a traditional process, the comprehensive energy consumption of unit products is reduced by 35%, and the production cost is reduced. Meanwhile, the three technical problems of liquid sulfur solidification, furnace temperature out-of-control and non-condensable gas accumulation are solved.

The invention discloses a system and a method for measuring and calculating the emission amount of atmospheric pollutants of underground coal fire, and relates to a system for measuring and calculating the emission amount of atmospheric pollutants of underground coal fire. Comprising a power supply module, a methane emission monitoring module, a carbon oxide monitoring module, a nitrogen oxide monitoring module, a sulfur dioxide monitoring module, a black carbon emission monitoring module and an atmospheric pollutant emission flux calculation module. The environmental factor acquisition module, the methane emission monitoring module, the oxycarbide monitoring module, the nitrogen oxide monitoring module, the sulfur dioxide monitoring module, the black carbon emission monitoring module and the atmospheric pollutant emission flux calculation module are all connected with the power supply module; the measuring and calculating method of the underground coal fire atmospheric pollutant emission amount measuring and calculating system comprises the following steps: S1, placing the instrument at a proper position, and adjusting a proper sampling frequency; the problem that the atmospheric pollutant emission flux is difficult to measure and calculate due to intermittency and dispersity of underground coal fire combustion is solved.

The utility model provides an acetoxyacetyl chloride synthesizer which comprises a first synthesis kettle and a second synthesis kettle, the top of the first synthesis kettle and the top of the second synthesis kettle are both communicated with a first metering tank and a second metering tank through pipelines, and the first metering tank and the second metering tank are both provided with feeding pumps. The bottom of the first synthesis kettle and the bottom of the second synthesis kettle are communicated with a rectifying kettle through pipelines, a rectifying assembly is arranged at the top of the rectifying kettle, and a discharge port is formed in the bottom of the rectifying kettle; the whole device is simple in structure, the two synthesis kettles can be alternately used, so that the production efficiency is effectively improved, acidic mixed waste gases such as sulfur dioxide and hydrogen chloride are not generated, the utilization rate of raw materials theoretically reaches 100%, the device completely conforms to an environment-friendly and pollution-free green process, the reaction process is mild, and the production cost is low. The reaction speed can be controlled by controlling the temperature and the catalyst input amount, the production operation is safe, the production cost is low, and the benefit is high.

Water is added into manganese dioxide powder to prepare manganese slurry, ammonia water or ammonium bicarbonate is used for adjusting the pH value, sulfur-containing flue gas enters a desulfurizing tower to react with the manganese dioxide mineral powder and the manganese slurry to remove sulfur dioxide, manganese sulfate slurry is generated and can be used for obtaining high-purity manganese sulfate, and ammonium sulfate generated through the reaction can be recycled. The process is mild in production condition, SO2 in the flue gas is converted into available manganese sulfate, resource recycling of sulfur dioxide in the flue gas can be achieved, economic benefits are generated, meanwhile, environmental pollution is reduced, and a technical route is provided for sulfur-containing flue gas treatment and resource utilization. The produced manganese sulfate can be used for preparing high-quality battery-grade manganese sulfate, a raw material is provided for the new energy battery industry, and the market competitiveness of enterprises is improved. The process method provided by the invention accords with the concept of combining ecological environment protection and economic development, and has a relatively high application value.

The invention discloses a method for preparing desulfurized biochar from kitchen waste anaerobic fermentation biogas residues, and belongs to the technical field of biochar preparation, the key point of the technical scheme is that the method for preparing desulfurized biochar from kitchen waste anaerobic fermentation biogas residues comprises the following steps: S1, drying and crushing biogas residues to obtain biogas residue powder; s2, adding the biogas residue powder into a metal solution, performing ultrasonic dispersion, dropwise adding a precipitant to enable the pH to be 8.5-9.5, reacting at a certain temperature, aging, performing suction filtration, and drying to obtain modified biogas residue powder; s3, carbonizing the modified biogas residue powder to obtain desulfurized biochar, and introducing metal into the biogas residue powder to improve the adsorption rate of the biochar to sulfur dioxide.

The invention discloses an intelligent adjustable forced oxidation control method and device for wet desulphurization, relates to the technical field of air pollution control, is particularly suitable for a coal-fired power plant boiler wet flue gas desulfurization technology and equipment, and can calculate the theoretical required oxidation air volume in real time according to the operation condition. The rotating speed of the oxidation fan is adjusted by adjusting the working frequency of the oxidation fan, so that the purposes of intelligently adjusting the flow operation mode and greatly reducing the energy consumption are achieved, and the oxidation effect is better under the condition that the volume of the pulp tank is limited; the method comprises the following steps: determining the oxidation volume of a slurry tank and the total amount of removed sulfur dioxide in boiler flue gas according to the design reference working condition of a wet desulphurization absorption tower; according to the historical operation parameters of the wet desulphurization absorption tower and the historical operation load of the boiler, the operation condition characteristic value and the oxidation air excess coefficient are determined; a preset interval is determined, the pulp pool oxidation liquid level and the pulp pool acidity in the actual operation parameters are compared with the preset interval, and the optimal oxidation air volume is determined; and keeping the oxidation liquid level and acidity of the pulp chest, and adjusting the oxidation air blower to the optimal oxidation air volume for operation.

The utility model relates to a novel intermittent arsenic reduction tank air pipe cleaning device which comprises an arsenic reduction tank body, an air pipe and a cleaning mechanism, the outer side wall of the arsenic reduction tank body is fixedly connected with a communicating pipe communicated with the arsenic reduction tank body, the air pipe is vertically connected with the communicating pipe, and the air pipe is communicated with the communicating pipe. A cleaning mechanism is mounted at the end, away from the arsenic reduction tank body, of the communicating pipe, and a limiting block is fixedly connected to the inner wall of the communicating pipe; the cleaning mechanism comprises an air cylinder, a movable rod, a connecting column and a drill bit. Compared with the prior art, the device has the beneficial effects that by utilizing the telescopic action of the air cylinder and combining the movement of the connecting column in the spiral groove, not only is the linear movement of the connecting column realized, but also the rotation action of the connecting column is realized, accumulated stubborn arsenic scales are efficiently cleaned, manual cleaning is replaced by an automatic cleaning mode, and the cleaning efficiency is improved. The risk that an operator is in contact with toxic substances is reduced, the possibility of poisoning and casualty caused by leakage of sulfur dioxide and arsenic trioxide is reduced, and the safety of a working place is improved.