649 results about "Sulfur dioxide" patented technology

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 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 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 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 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 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.

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.

The invention relates to the technical field of preparation of nano aluminum oxide, in particular to a preparation method of high-purity nano aluminum oxide, which comprises the following steps: dissolving aluminum ammonium sulfate in high-temperature hot water, filtering, recrystallizing, drying the recrystallized aluminum ammonium sulfate to remove moisture to obtain dried aluminum ammonium sulfate, and roasting the dried aluminum ammonium sulfate at high temperature to obtain the high-purity nano aluminum oxide. The preparation method comprises the following steps: calcining the alumina powder, decomposing to generate alpha-Al2O3 nano-alumina, simultaneously releasing ammonia gas and sulfur dioxide gas, introducing the ammonia gas and sulfur dioxide released in the roasting process into water through a negative pressure absorption device to generate an ammonium sulfate solution, and finally obtaining the superfine alumina powder with the particle size reaching the nanoscale. According to the method, the market value of the product is improved, ammonia gas and sulfur dioxide generated in the roasting process are absorbed to successfully generate a byproduct ammonium sulfate, and the byproduct ammonium sulfate is reused in a catalyst wet vanadium precipitation process, so that the environmental pollution is reduced, the output quality of aluminum oxide is improved, and the production loss caused by impurities is reduced, thereby improving the production efficiency and economic benefits.

The invention belongs to the technical field of comprehensive utilization of seawater resources, and particularly relates to a green circulation method and system integrating seawater desalination and high-efficiency bromine extraction of concentrated seawater, and the system comprises a seawater desalination unit, a pretreatment unit, an oxidation replacement unit, a bromine elementary substance blowing-out unit, a bromine elementary substance absorption and enrichment unit and a bromine rectification and purification unit which are sequentially connected in series, the pipelines of the units are communicated to form a continuous material channel; the seawater desalination unit is used for producing fresh water and enriching concentrated seawater; the pretreatment unit removes impurities through a security filter and adjusts pH through an acidification pool; the oxidation replacement unit mixes chlorine and concentrated seawater through a gas-liquid mixer, and a bromine solution is generated in a reaction tank; the stripping tower realizes bromine gas stripping through atomization spraying, a filler area and a gas distributor; the absorption tower enriches bromine into hydrobromic acid by using a sulfur dioxide aqueous solution; the rectification unit is oxidized by a distillation tower, condensed and separated to obtain liquid bromine. The method realizes synchronous recovery of fresh water and bromine resources, conforms to a green circulation concept, and has remarkable economic and ecological benefits.

The invention discloses wet desulphurization and dust removal equipment for a boiler of a thermal power plant, which belongs to the technical field of environmental protection engineering and comprises a desulfurization tower, a slurry tank is arranged at the bottom of the desulfurization tower, an exhaust port is formed in the top of the desulfurization tower, an air inlet is communicated with the side wall of the desulfurization tower, and the wet desulphurization and dust removal equipment further comprises a foaming mechanism. Compared with an existing wet spraying technology, through the venturi tube design of the first treatment tube, flowing of flue gas in the convergence tube is accelerated, bubbling blades are driven to rotate through the flue gas, clear liquid in the slurry pond is sucked out and mixed with the flue gas to impact the bubbling blades, bubbles are formed to wrap the flue gas, and the reaction is continuously carried out, so that the reaction area is increased; and moreover, when the flue gas passes through the fixed disc, through self-adaptive angle adjustment and synchronous rotation of the scraper under the action of different flue gas loads, bubbles are crushed, cut and refined, so that the total area ratio of the bubbles is remarkably increased, and the dissolving effect of sulfur dioxide gas and the capturing effect of dust are improved.

The invention discloses a method and a device for deeply purifying an arsenic solution and preparing high-purity arsenic oxide. The method comprises the following steps: oxidizing antimony impurities in an arsenic solution, precipitating, deeply removing, adding a reducing agent to reduce pentavalent arsenic in the solution into trivalent arsenic, decomposing, evaporating, cooling and crystallizing to obtain the high-purity arsenic trioxide. Wherein oxidation precipitation is carried out in a purification tank, reduction is carried out in a reduction tank, the purification tank and the reduction tank are located in the same box body and are separated by a filter screen and a partition plate in the middle, precipitated arsenic antimonate generated after purification in the purification tank is intercepted through the filter screen, and filtrate enters the reduction tank; during reaction, the partition plate is started for use to prevent the solution from flowing. The filtrate enters a reduction tank, reducing agents such as sulfur dioxide are introduced, pentavalent arsenic in the solution is further reduced to form trivalent arsenic, and a high-purity arsenic trioxide product (As2O3 is larger than or equal to 99.5%, and Sb is smaller than or equal to 0.05%) is prepared.

The application discloses a physicochemical index detection method for food can production and relates to the technical field of food detection. The method comprises the following steps: deploying a near-infrared spectrum, eddy current electromagnetic and biological impedance three-mode sensing unit in a ring arrangement, and non-contact collecting can body reflection spectrum, eddy current loss and complex impedance response signals; extracting sulfur dioxide, heavy metal and microbial characteristic parameters through wavelet packet decomposition, Hilbert transform and principal component analysis; constructing a three-element coupling correction equation group to cross correct original data and output accurate detection results; and integrating a self-calibration mechanism and an abnormal product automatic sorting function. The application realizes nondestructive, efficient and multi-index parallel detection by constructing four core technical systems, namely, multi-modal synchronous acquisition, cross-modal feature coupling, dynamic threshold decision and online self-calibration, has stable precision and reduces costs by 60%, and meets the real-time quality control and traceability requirements of a full-automatic production line.

The utility model relates to the technical field of microbial fermentation, in particular to a compound microbial agent liquid fermentation device, which comprises a fermentation box and an exhaust treatment mechanism, the exhaust treatment mechanism comprises an exhaust hood, the exhaust hood is fixed on one side of the fermentation box, and a fan is fixed inside the exhaust hood. A treatment barrel for performing biological desulfurization and denitrification on gas is arranged on one side of the exhaust hood, and a first exhaust pipe is fixed between one side of the exhaust hood and the bottom of the treatment barrel. Gas generated by microbial fermentation in the fermentation box is sucked into an exhaust hood through a fan in the exhaust treatment mechanism, and harmful gas sulfur dioxide and nitric oxide are converted into sulfur and nitrogen through desulfurization and denitrification microorganisms in a treatment barrel; hydrogen and carbon monoxide in harmless gas in the treatment box are subjected to combustion reaction through the flame projector to be converted into water, and finally safe gas is discharged from the exhaust port, so that the safety of an external fermentation environment is improved, resource recycling is realized, and greenhouse gas emission is reduced.

The invention discloses a fresh water recovery system based on seawater desulfurization. The fresh water recovery system comprises a flue gas header pipe, an evaporation tower, a condensing tower, a desulfurization tower and a seawater delivery system, the seawater conveying system is used for providing seawater for the desulfurization tower so as to absorb sulfur dioxide in flue gas flowing from the flue gas main pipe; seawater absorbing sulfur dioxide as a cooling medium flows through the condensing tower and then enters the evaporation tower to serve as a water source; part of the flue gas of the flue gas header pipe enters the evaporation tower to serve as a heat source to realize evaporation of a water source, and the flue gas with water vapor flows into the condensation tower to realize condensation. The desulfurization process and the fresh water recovery process are organically combined, flue gas waste heat is used for driving seawater evaporation, meanwhile, desulfurized low-temperature seawater is used as a condensation cooling medium, the energy utilization efficiency is remarkably improved, dependence on external energy is reduced, the consumption of seawater is reduced through circulating gradient utilization of seawater, and the energy consumption is reduced. And valuable fresh water is produced while flue gas desulfurization is realized.

This invention discloses a method for preparing sodium houttuynia cordata, comprising the following steps: adding sodium methoxide and toluene to a reaction vessel, heating, then slowly adding nonanone and ethyl formate, and after the addition is complete, reacting with a gradient cooling process, and post-processing to obtain an aqueous phase containing intermediate I; adding the aqueous phase containing intermediate I and toluene to the reaction vessel, stirring, cooling, and rapidly introducing liquid sulfur dioxide, continuously stirring and reacting at 0-10°C for 5-15 minutes, cooling, and filtering to obtain crude sodium houttuynia cordata. The preparation method of this invention directly introduces liquid sulfur dioxide during the sulfonation reaction, greatly shortening the process time, while achieving high product yield and purity, and requiring less sulfur dioxide. Furthermore, in the post-processing of sodium houttuynia cordata, adding toluene to the reaction solution beforehand can effectively transfer the generated impurities to the toluene; recrystallization using a 50 v / v% ethanol aqueous solution removes water-soluble and oil-soluble impurities while further reducing the risk of fire and explosion during centrifuge operation.

The invention discloses a flue gas acid making system and a negative pressure balanced flue gas acid making method, and belongs to the technical field of flue gas acid making, the system comprises an electric demister, a drying tower, a sulfuric acid circulating tank, a sulfur dioxide fan, a preheater and a converter. According to the invention, a multi-stage collaborative demisting process mode of connecting the electric demisters in parallel and then connecting the electric demisters in series with the wire mesh demister is constructed, so that deep removal of acid mist particles with different particle sizes, especially submicron-order acid mist particles is realized. According to the invention, through a leaked gas recycling and equipment on-line repairing integrated technology, SO2 unorganized dissipation treatment and acid making process parameter optimization are deeply coupled. The pressure relief joint control device is additionally arranged between the pneumatic butterfly valves at the inlet and the outlet of the faulted electric demister, and the negative pressure in the electric demister can be controlled through adjustment of the main pressure relief valve and interlocking with a fan frequency conversion system, so that non-stop maintenance is realized.

The invention discloses an ammonia desulfurization system and method based on zone control. The ammonia desulfurization system comprises a desulfurization tower, an absorption circulating tank, an ammonia water tank, a rinsing tank and a process water tank. The desulfurization tower is sequentially provided with a flue gas outlet, a demisting section, a second-section absorption layer, a first-section absorption layer and a concentration section from top to bottom. A partition plate is arranged in the absorption circulating tank and divides the absorption circulating tank into an upper oxidation tank and a lower absorption circulating section. An aeration pipe is arranged in the upper oxidation tank, and the upper oxidation tank is connected with a spraying liquid inlet of the second absorption layer through a pipeline; the lower concentration section of the desulfurizing tower is connected with the oxidation tank through a liquid conveying pipeline. The water washing tank supplies water to the demisting section and the absorption circulating tank; the ammonia water tank supplements ammonia water to the oxidation tank, the first-section absorption layer and the lower absorption circulation section respectively; recycled liquid of the demisting section is connected back to the rinsing bath through a pipeline. According to the invention, absorption and oxidation are partitioned in the same tank, so that coupling interference is eliminated; two-stage absorption and demisting recovery are matched, so that ammonia escape is effectively controlled while efficient removal of sulfur dioxide is guaranteed.

The utility model belongs to the field of desulfurization equipment, concretely relates to a flue gas circulating fluidized bed dry method desulfurization equipment, including the casing, the inside of casing is connected with the connecting seat through screw thread, the upper end fixedly connected with support rod of connecting seat. The utility model of connecting seat's effect is through the design, flue gas is input through the connecting seat, then can input compressed air under the action of air compressor, and the dry absorbent in the material box can enter the inside of rotating pipe and output through the nozzle and contact with flue gas, the chemical reaction of absorbent and sulfur dioxide generates solid sulfate, thereby realizes the desulfurization purpose, in the output process of dry absorbent, can drive the driving wheel to rotate under the action of motor, the rotation of transmission wheel and connecting shaft is realized by the rotation of driving wheel drive belt, and then the rotation of nozzle can realize the rotary output of dry absorbent, improves the output range and uniformity of dry absorbent and makes dry absorbent and flue gas contact complete desulfurization effect better.

The utility model relates to a tin bath sulfur dioxide blowing device which comprises a sulfur dioxide generating device used for generating small-flow sulfur dioxide gas, and the sulfur dioxide generating device is led into a blowing pipe; the blowing pipe is a metal pipe body, one end of the metal pipe body is sealed, the other end of the metal pipe body is connected to the sulfur dioxide generating device through a hose, a small hole is formed in the sealed end, and a nozzle is arranged at the position of the small hole; a flow meter is arranged on the hose and is used for monitoring the flow of sulfur dioxide in the blowing pipe to be small flow; a support is arranged on the metal pipe body, and the blowing pipe is fixed to the positions of climbing rollers, attached with tin sulfide, of the first to third transition roller tables through the support. Sulfur dioxide is blown to the roller through the small holes, sulfur dioxide and tin sulfide are subjected to a chemical reaction, SO2 and the glass plate can generate a Na2SO4 thin film protection layer capable of being wiped off under the high-temperature condition, the Na2SO4 thin film protection layer is attached to the lower surface of the glass plate, and the hardness of the glass plate is increased. The probability of gouges and abrasion is reduced, and the problem of quality defects is solved.

The utility model relates to a device for producing tellurium powder by using tellurium dioxide, and belongs to the technical field of tellurium powder production equipment. Comprising a leaching kettle, a plate-and-frame filter press, a primary reduction kettle, a primary reduction filter barrel, a secondary reduction kettle, a secondary reduction filter barrel and a waste liquid tank which are sequentially connected, materials in the leaching kettle are conveyed into the plate-and-frame filter press through a first conveying pump, and the leaching kettle is further connected with a hydrochloric acid storage tank through a pipeline; the opening of the primary reduction kettle is positioned right above the primary reduction filter barrel, and the primary reduction kettle is also connected with a sulfur dioxide steel cylinder; materials in the primary reduction filter barrel are conveyed into a secondary reduction kettle through a second conveying pump; an outlet of the secondary reduction kettle is positioned right above the secondary reduction filter barrel, and the secondary reduction kettle is also connected with a sulfur dioxide steel cylinder; materials of the secondary reduction filter barrel are input into the waste liquid tank through a third conveying pump; the tellurium dioxide is produced by adopting the method, the technological operation is simple, the production efficiency is high, the tellurium content of the liquid after secondary reduction is low, the liquid can be reused in a leaching kettle, and the use amount of hydrochloric acid is reduced.

The utility model discloses a diesel generator flue gas purification mechanism for civil air defence engineering, including air inlet pipe and purification bin, the air inlet pipe one end is linked with diesel generator exhaust pipe in civil air defence engineering power generation room intercommunication, the other end of air inlet pipe is inserted into the purification bin and the opening direction is perpendicular to downward, the open end position of air inlet pipe in the purification bin is connected with the shunt joint, each interface of shunt joint all is connected with the jet pipe that the air hole of pipe body lateral wall is evenly set up, the utility model relates to civil air defence engineering technical field, utilize liquid supply booster pump and press into the spray subassembly in alkaline solution (15% magnesium hydroxide compound agent), and further via spray subassembly to the spray of filler layer, make the nitrogen monoxide, nitrogen dioxide, sulfur dioxide and particulate matter etc. in tail gas contact with the alkaline water mist in purification bin and filler layer, to the purification treatment of nitrogen monoxide, nitrogen dioxide, sulfur dioxide and particulate matter.