243 results about "Oxide sulfur" patented technology

The invention relates to the field of environment restoration, and discloses a semi-coke ecological system environment restoration method which comprises the following steps: waste gas treatment: treating sulfur-containing gas, nitric oxide and particulate matters generated in semi-coke production by adopting a multi-stage gas purification device, and further purifying residual harmful substances by adopting a low-temperature plasma technology; wastewater treatment: carrying out multi-stage purification on industrial wastewater generated in semi-coke production through physical filtration, chemical precipitation and biological treatment, and carrying out advanced treatment on the wastewater in combination with a membrane separation technology; and solid waste treatment: carrying out high-temperature gasification treatment on solid wastes generated in semi-coke production, recovering energy and using residues for regenerated material production. The comprehensive treatment of various pollutants generated in the production process is realized through the technologies of multi-stage waste gas purification, waste water deep treatment and solid waste resource utilization, and the removal efficiency of sulfur oxides and nitrogen oxides is remarkably improved by the waste gas treatment system through the combination of wet desulfurization and dry desulfurization.

The invention relates to the technical field of waste gas treatment, in particular to a heat supply plant boiler flue gas desulfurization device which comprises a desulfurization tower, a gas inlet is formed in one side of the bottom of the desulfurization tower, a gas outlet is formed in the top of the desulfurization tower, and the heat supply plant boiler flue gas desulfurization device further comprises a fixing frame fixedly arranged on the inner side of the desulfurization tower; the constant-speed spraying units are rotationally arranged on the fixing frame, and a speed reducing mechanism is arranged between every two adjacent constant-speed spraying units; the driving assembly is arranged on the fixed frame and is used for driving the constant-speed spraying unit to rotate in the desulfurizing tower; the gas distribution assembly is arranged at the bottom of the fixing frame and can uniformly disperse flue gas introduced from the gas inlet into the desulfurization tower, according to the boiler flue gas desulfurization device for the heat supply plant, through the designed gas distribution assembly and the constant-speed spraying unit, the flue gas can be uniformly distributed in the desulfurization tower and is fully mixed and reacted with alkali liquor, so that an efficient desulfurization effect is achieved, and the desulfurization efficiency is improved. The content of sulfur oxides in the flue gas is greatly reduced, and the environmental protection requirement is met.

The invention discloses a carbon capture and amine recovery system. The system comprises a rough washing tower, an absorption tower, a decarbonization tower and a deamination tower which are sequentially connected through a pipeline system, the rough washing tower is used for removing pollutants in the flue gas, including sulfur oxides, PM particles, hydrogen sulfide and the like; an amine solution spraying module is arranged at the upper part of the absorption tower, flue gas enters from a lower layer area of the absorption tower, and the amine solution spraying module sprays an amine solution to capture carbon dioxide in the flue gas so as to form a carbon capture solution and decarbonized flue gas; the decarburization tower is used for receiving the carbon capture solution and treating the carbon capture solution to obtain high-purity CO2 and a recovery solution; wherein the high-purity CO2 is discharged or retreated; the recovery solution flows back to an amine solution spraying module in the upper layer area of the absorption tower through a pipeline system to realize cyclic utilization; and the decarbonized flue gas is upwards conveyed to a deamination tower, and is discharged after deamination. Through one set of system, three-stage flue gas purification treatment of desulfurization, carbon capture and amine capture and recovery is realized, and the whole set of system is high in recovery efficiency.

The invention discloses a desulfurizing agent for a cement kiln as well as a production method and application of the desulfurizing agent. The desulfurizing agent is prepared from the following raw material components in percentage by weight: 88-96 wt% of limestone; 2-6 wt% of an iron raw material; 1-6 wt% of gypsum; and 0-4 wt% of a silicon-aluminum material. The desulfurizer is produced by utilizing a kiln line of a cement enterprise, is dried and ground with raw materials according to a mass ratio of 1: 100 to 3: 100, and then is put into a cement kiln system for cement clinker production, so that the emission concentration of sulfur oxides in kiln tail flue gas produced by sulphoaluminate cement clinker can be reduced from more than 2000mg / Nm < 3 > to less than 35mg / Nm < 3 >; and for other types of cement clinker, the content of the cement clinker can be reduced from 1000 mg / Nm < 3 > or above to 35 mg / Nm < 3 > or below, the desulfurization effect is stable, and the environment-friendly emission requirement can be continuously met.

The invention relates to the field of carbon dioxide capture and utilization, in particular to a method and system for producing formate through synergistic capture and conversion of flue gas carbon dioxide, formate is obtained through electrochemical conversion of carbon-rich capture liquid, capture liquid is generated, the capture liquid directly captures flue gas carbon dioxide, and the carbon-rich capture liquid is obtained again. And the carbon-rich trapping liquid is continuously recycled for electrochemical conversion. The carbon-rich capture liquid electrochemical conversion process and the flue gas carbon dioxide capture process do not need to be alternately carried out step by step, but are synchronously and continuously carried out in the same system, the whole process does not need to pre-treat a small amount of oxygen and trace nitrogen oxide and sulfur oxide gas impurities in the flue gas, and a high-energy-consumption carbon dioxide gas regeneration step is avoided; the method overcomes the defect of low single conversion rate of electrochemical conversion of carbon dioxide gas, realizes collaborative capture and conversion of flue gas carbon dioxide to produce formate, and finally realizes direct conversion and utilization of carbon dioxide from flue gas to a high-value product formate.

The present invention provides a coal-saving, desulfurization, and decoking catalyst for boilers and an application method thereof. Through the synergistic effect of multiple components, the catalyst can simultaneously achieve coal-saving, desulfurization, decoking, corrosion protection, and ash cleaning functions during boiler operation, effectively solving the problems of single function, low desulfurization efficiency, poor decoking effect, and insufficient adaptability in the prior art. The desulfurization catalyst neutralizes sulfur oxides in flue gas, reducing low-temperature slagging. The temperature-sensitive expansion particles dynamically expand and peel off hard coke. The porous carrier particles adsorb ash and complex salts. The high-temperature retention loosening agent and the catalyst work together to prevent secondary accumulation, improve heat transfer conditions, and increase boiler thermal efficiency. The coal-saving agent reduces fuel consumption. The metal protective agent forms an anti-corrosion film on the heated surface, extending the life of the equipment and significantly improving the economic efficiency of boiler operation.

The invention provides a prebaked anode flue gas carbon capture integrated system which comprises an integrated purification unit, a pollutant removal unit and a pressure swing adsorption carbon capture unit which are sequentially connected through a pipeline, flue gas is subjected to dust pre-removal and organic pollutant adsorption of the integrated purification unit and deep treatment of nitrogen and sulfur oxides of the pollutant removal unit, and the flue gas is subjected to carbon capture and carbon capture. According to the invention, the flue gas enters the pressure swing adsorption unit and then is efficiently captured by the pressure swing adsorption unit, and a continuous and synergistic treatment chain is formed in the whole process, so that the heat loss of the flue gas transmitted among the units is obviously reduced, and the energy waste caused by equipment dispersion in the traditional system is avoided; meanwhile, in the aspect of equipment layout, the modular integrated design greatly compresses the occupied area, efficient utilization of an industrial site is achieved, the flue gas treatment cost is reduced, and the flue gas treatment reliability is improved.

The invention provides a preparation method of a flexible composite scintillation film. The preparation method specifically comprises the following steps: S1, uniformly mixing rare earth sulfur oxide powder, optical cement, a dispersing agent and a curing agent through ball milling treatment to obtain homogeneous slurry; s2, in a vacuum environment, performing exhaust treatment on the homogeneous slurry prepared in the step S1 to obtain degassed slurry; s3, uniformly coating a substrate with the degassed slurry prepared in the step S2 to obtain a thin film; and S4, curing the film prepared in the step S3 to obtain the flexible composite scintillation film. Compared with the prior art, the preparation method of the rare earth oxysulfide flexible composite scintillation film provided by the invention has the advantages that the excellent flexibility and machinability of the film are utilized, and the preparation of scintillator detectors in any shape can be realized.

In some embodiments, the present disclosure relates to a system. The system includes a substrate and a fluid trapping material formed on one or more surfaces of the substrate. The fluid capture material includes a sorbent material incorporating one or more fluids including water, carbon dioxide, sulfur oxides, alcohols, or a combination thereof. The fluid capture material also includes one or more binder materials, wherein the binder materials are optionally at least partially cross-linked. The fluid capture material includes at least one aperture.

The invention discloses a flue gas treatment device based on a noble metal catalyst, and relates to the technical field of flue gas treatment. An inner mounting frame is fixedly mounted on the inner surface wall of the treatment box, an annular outer frame is fixedly mounted on one side of the outer wall of the inner mounting frame, and a rotating groove is pre-formed in the annular outer frame. Through a multi-stage collaborative filtering mechanism, a clean reaction environment is provided for a noble metal catalyst: a linkage frame drives a filter plate to rotate, and large-particle impurities, sulfur oxides and chlorides are intercepted by utilizing centrifugal force and a composite filter material (a stainless steel filter screen and activated carbon); the guide vanes form spiral airflow, and fine impurities with the particle size larger than or equal to 1 micron are separated through centrifugal force; the metal filter pipe is combined with dynamic negative pressure adsorption, deep removal of residual dust and three-stage filtration, so that the impurity content in flue gas can be greatly reduced, catalyst poisoning, blockage or sintering are avoided, the service life of the catalyst is prolonged, and the replacement cost of precious metal is greatly reduced.

The invention discloses a power generation system for fused salt energy storage by using biomass. According to the system, the purity of raw materials is remarkably improved through an intelligent sorting and impurity removing unit of the pretreatment and coupling module, the waste heat driving drying unit effectively recycles system waste heat to reduce energy consumption, the flexible forming unit generates biomass fuel with stable physical characteristics, and the nano-catalysis pretreatment unit optimizes the reaction activity of the fuel on the molecular level. The measures directly improve the integrity of biomass combustion and the heat energy conversion efficiency, so that the fuel of unit mass releases more effective heat in the fused salt combustor. Meanwhile, tar is decomposed from the source through catalytic pretreatment, generation of nitric oxide and sulfur oxide precursors is reduced, the treatment load of a follow-up flue gas purification system is greatly reduced, the whole system reduces dependence on external energy on the basis of ensuring stable power supply through collaborative optimization of fuel pretreatment, stored energy release and clean emission, and the energy-saving and environment-friendly effects are achieved. And a high-adaptability solution is provided for distributed energy supply.

The invention discloses a Fe-OMS-2 (at) SiO2 core-shell catalyst for low-temperature collaborative denitration and demercuration and a preparation method thereof. The catalyst is a composite material of a Fe-OMS-2 core and a silicon dioxide shell layer, wherein the Fe-OMS-2 core is formed by modifying natural manganese potassium ore (OMS-2) with transition metal iron oxide. The catalyst is specifically prepared from the following components in percentage by mass: 9 percent to 20 percent of Fe2O3, 12 percent to 28 percent of SiO2 and the balance of OMS-2. The preparation method comprises the following steps: by taking a Fe (NO3) 3.9 H2O solution as a precursor solution and tetraethoxysilane as a silicon source, carrying out citric acid etching, hydrothermal reaction and sodium borohydride reduction to prepare a Fe-OMS-2 core, then adopting an active agent CTAB (Cetyltrimethyl Ammonium Bromide) to assist in stirring and dipping to coat Fe-OMS-2 with silicon dioxide, and carrying out centrifuging, drying and calcining to prepare the catalyst. The catalyst is of a blocky structure formed by adhesion of nanorods, silicon dioxide microspheres are evenly attached to the surface of the catalyst, and the catalyst has more active sites and good oxidation-reduction performance; the structure of the catalyst is more stable due to the coating of the silicon shell, the catalyst is protected from being corroded by sulfur oxides, and NO and Hg0 can be efficiently and synergistically removed under a low-temperature condition.

The flue gas desulfurization device based on the calcium-based absorbent, provided by the utility model, is high in desulfurization efficiency, simple in structure, simple to operate and maintain, and capable of efficiently absorbing sulfur oxides in flue gas so as to realize flue gas treatment. The bottom end of the desulfurizing tower shell is communicated with an inlet smoke box, the end part of the inlet smoke box is communicated with a smoke inlet, and an inlet smoke guide plate is arranged in the inlet smoke box close to the smoke inlet; the top end of the desulfurizing tower shell is communicated with an outlet smoke box, the end part of the outlet smoke box is communicated with a smoke outlet, and an outlet smoke guide plate is arranged in the outlet smoke box close to the smoke outlet; a rectifying grid is arranged in the desulfurizing tower shell close to the inlet smoke box; the first desulfurization module layer, the second desulfurization module layer,..., the nth desulfurization module layer are sequentially arranged in the desulfurization tower shell from bottom to top from the upper part of the rectification grid; each desulfurization module layer is provided with a plurality of calcium-based absorbent boxes; a plurality of loading and unloading doors in one-to-one correspondence with the desulfurization module layers are formed in the wall plate of the desulfurization tower shell.

A system is described that enables the purification of COx, SOx, NOx, dioxin and furan, and H2S gases using wet and dry filters in a single chimney, comprising: a nozzle system (2) that sprays a mixture consisting of water, micronized zeolite, ammonia, and boron mineral in fine droplets to perform the first purification of SOx (sulfur oxides), NOx (nitrogen oxides), and COx (carbon oxides) gases entering the chimney (1) from the combustion gas, a zeolite-based dry filter (3) that purifies the dioxin and furan components in the flue gas (B) rising after the first purification, a first continuous measurement system (4) that measures the values of the combustion gas at the entry point to the chimney (1), a second continuous measurement system (5) that measures the values of the combustion gas after the dry filter (3), an Al-supported processor (6) that adjusts the amount of the mixture to be sprayed from the nozzle system (2) based on the comparison of the first continuous measurement system (4) and the second continuous measurement system (5).

The invention relates to a filter unit for removing gaseous compounds (nitrogen oxides, sulfur oxides, volatile organic compounds, carbon monoxide and the like) and bacteria and viruses from interior air, in particular interior air of a motor vehicle, the invention also relates to a method for removing gaseous harmful substances and bacteria and viruses from interior air, in particular interior air of a motor vehicle.

The invention discloses a thermal power plant boiler flue gas desulfurization and denitrification integrated method, namely, a chemical absorption and catalytic reduction combined mode is researched to effectively treat sulfur oxide sulfur (SO2) and nitrogen oxide (NOx). The method comprises the following steps: firstly, converting sulfur-containing emissions into harmless substances by using a redox agent through a wet desulphurization technology, and then converting NOx into nitrogen and water by applying a selective catalytic reduction (SCR) technology. Operation data analysis shows that the removal rates of SO2 and NOx respectively reach 97% and 94%, and the desulfurization and denitrification efficiency is far higher than that of a traditional thermal power plant boiler. According to the desulfurization and denitrification integrated technology, the limitation of a traditional desulfurization and denitrification technology is broken through, and a new technical scheme is provided for a thermal power plant.

The invention discloses a nitrogen / sulfur co-doped porous carbon iron-based composite sodium ion battery negative electrode material and a preparation method thereof. According to the material, chitosan is taken as a carbon source, and the honeycomb-shaped composite carbon material with a hierarchical mesoporous structure is prepared by combining a sodium chloride template method and a two-step calcination process through a double-doping synergistic effect of cyanamine and ferric sulfate. FeS and Fe4 (Fe (CN) 6) 3 active phases are uniformly distributed in the material, FeS and Fe4 (Fe (CN) 6) 3 exist in a heterojunction form, nitrogen is doped in forms of pyridine nitrogen (more than or equal to 50%) and pyrrole nitrogen, and sulfur exists in forms of C-S-C bonds and sulfur oxides. The first efficiency of the material is greater than 90%, the reversible capacity under the current density of 1A / g reaches more than 450mAh / g, the capacity retention ratio after 1000 cycles is greater than or equal to 90%, and the reversible specific capacity under the high rate of 20A / g is still kept more than 150mAh / g. The preparation method comprises the steps of spray drying, two-step calcination and pickling pore-forming. The invention solves the problems of low capacity and poor cycling stability of the existing sodium-ion battery negative electrode material, and is suitable for high-power energy storage equipment.

Systems, devices, and methods for a gas sensor comprising one or more optical cells; a processor having addressable memory, the processor configured to: detect gas from the one or more optical cells of the gas sensor, where the detected gas is one or more of: methane, carbon dioxide, hydrogen sulfide, water, ammonia, sulfur oxides, and nitrogen; record data corresponding to the detected gas, where the recorded data comprises at least one of: an ambient temperature from a temperature sensor, an ambient pressure from a pressure sensor, an aerial vehicle telemetry, and an aerial vehicle location from a global positioning system (GPS); and generate a map of atmospheric greenhouse gas concentration on a map based on the detected gas and the recorded data.

The invention discloses a flue gas desulfurization and denitrification purification treatment system, the flue gas desulfurization and denitrification purification treatment system comprises an adsorption tower, a regeneration tower and a reaction tower, the adsorption tower is internally provided with an adsorbent, so that flue gas enters the adsorption tower, sulfur oxides and nitrogen oxides in the flue gas are adsorbed and removed by using the adsorbent, the regeneration tower is connected with the adsorption tower, and the reaction tower is connected with the adsorption tower. The reaction tower is connected with the regeneration tower, so that regenerated gas desorbed and regenerated by the regeneration tower enters the reaction tower for salt production, and part of tail gas generated by salt production of the reaction tower enters the regeneration tower so as to carry the regenerated gas to flow out of the regeneration tower. Part of salt manufacturing tail gas is used as shielding gas to replace nitrogen, so that the usage amount of the nitrogen in the regeneration tower is reduced, and the operation cost and the initial investment of the system are reduced. And moreover, the salt-making tail gas is rich in pollutants, so that the concentration of the pollutants in the regenerated gas can be effectively improved, and the salt-making reaction in the subsequent reaction tower is facilitated.

The invention relates to the technical field of flue gas condensation, and discloses a water-saving device for flue gas condensed water recovery, which comprises a main body component and a shell, one side of the shell is provided with a flue gas inlet, and the other side of the shell is provided with a flue gas outlet; the collecting mechanism comprises a condensed water collecting unit and a flue gas heat exchange unit, the condensed water collecting unit is installed in the shell, the condensed water collecting unit is installed at one end of the shell, flue gas heat exchanges heat with cold water in the flue gas heat exchange unit through the pipe wall of a heat exchange pipe, and the cold water absorbs heat energy of flue gas to achieve flue gas cooling; meanwhile, sulfur oxides, carbon dioxide and ammonia gas in the flue gas enter flue gas condensed water, emission and thermal pollution of sulfur dioxide and carbon dioxide in the flue gas are reduced, and meanwhile, the flue gas condensed water can flow into a condensed water collecting unit along with the flue gas through an internal flow guide plate; the bottom plate of the flue gas heat exchange unit with the inclined angle not only helps flue gas condensed water to enter the collecting unit, but also prevents the condensed water from overflowing out of the flue gas outlet along with flue gas.

This invention belongs to the field of mineral processing technology, specifically relating to a selective sulfidation roasting-flotation separation method for a smithsonite-calcite mixed ore. The method first involves crushing and grinding the smithsonite, calcite, and sulfiding agent, then mixing them in a certain proportion and subjecting them to sulfidation roasting, preferentially causing the smithsonite to undergo sulfidation. After cooling the roasted product in an inert atmosphere, flotation separation is performed using xanthate as a collector to obtain zinc concentrate. By controlling the atmospheric conditions during the sulfidation roasting process, the sulfidation reaction efficiency of the smithsonite can be improved, and the generation of sulfur oxide gases during roasting can be reduced. When using this method to process the smithsonite-calcite mixed ore, effective recovery of the smithsonite can be achieved, with a flotation recovery rate exceeding 88%. This invention features a simple process flow and easily controllable operating conditions, providing a new technical approach for the efficient utilization of smithsonite resources.

The present invention relates to an energy-saving and highly efficient desulfurization process using a spiral small nozzle, and particularly relates to the technical field of desulfurization. It includes: the control module determines whether the initial flow rate is qualified based on the obtained initial flow rate, and determines the opening value of the first valve when it is unqualified; the original flue gas enters the first flue gas heat exchanger for heat exchange, and the control module determines the starting power of the liquid pump according to the obtained content of sulfur oxides to perform the first spraying on the original flue gas; when the first spraying is completed, the control module determines whether the sulfur oxides in the original flue gas are completely removed based on the obtained weight of gypsum. When they are not completely removed, the starting power of the liquid pump is adjusted, and at the same time, it is determined to open the third valve for the second spraying; when the second spraying is completed, the condensing demister performs gas-liquid separation on the original flue gas; when the desulfurization tower completes the desulfurization of the original flue gas, the clean flue gas enters the second flue gas heat exchanger again along the pipeline for temperature increase and then is discharged from the chimney; thereby improving the desulfurization efficiency.

The present invention relates to a sulfuric acid production device provided with: a line (41) for supplying a raw material containing at least a sulfur component; a conduit (45) into which the first refrigerant is introduced; a combustion furnace (51) that combusts the starting material and generates a combustion gas containing sulfur oxides; a waste heat boiler (52) that cools the combustion gas by heat exchange with the first refrigerant that has been heated; a converter (61) for generating a reaction gas containing sulfur trioxide and water by oxidizing the sulfur oxide with a catalyst; a cooler (62) that cools the reaction gas by heat exchange with the second refrigerant; a dilute sulfuric acid tower (71) for absorbing sulfur trioxide and water contained in the cooled reaction gas into the sulfuric acid aqueous solution to generate dilute sulfuric acid, and discharging an exhaust gas containing sulfur dioxide and oxygen; and a heat exchange means (63) for preparing a heated first refrigerant and a cooled second refrigerant by heat exchange between the heated second refrigerant and the first refrigerant, and supplying either the heated first refrigerant or the cooled second refrigerant to the waste heat boiler (52).

Provided, according to one embodiment of the present invention, is an electrochemical regeneration device for a harmful substance adsorbent, comprising: a purification unit in which exhaust gas containing nitrogen oxides or sulfur oxides flows in via an exhaust gas inflow unit, a metal complex compound capable of adsorbing the nitrogen oxides or sulfur oxides flows in from an adsorbent storage unit into an adsorbent inflow unit, the exhaust gas and the metal complex compound are mixed in a mixing unit so that the exhaust gas is purified, the purified exhaust gas is discharged to the outside via a first discharge unit, and a contaminated metal complex compound is transferred to a regeneration unit via a second discharge unit; the regeneration unit in which hydrogen is oxidized in an anode unit and the contaminated metal complex compound is reduced and regenerated in a cathode unit; and a circulation unit in which the regenerated metal complex compound is transferred to the adsorbent storage unit to be reused.

Systems, devices, and methods for a gas sensor comprising one or more optical cells; a processor having addressable memory, the processor configured to: detect gas from the one or more optical cells of the gas sensor, where the detected gas is one or more of: methane, carbon dioxide, hydrogen sulfide, water, ammonia, sulfur oxides, and nitrogen; record data corresponding to the detected gas, where the recorded data comprises at least one of: an ambient temperature from a temperature sensor, an ambient pressure from a pressure sensor, an aerial vehicle telemetry, and an aerial vehicle location from a global positioning system (GPS); and generate a map of atmospheric greenhouse gas concentration on a map based on the detected gas and the recorded data.

The application discloses a combustion-supporting and corrosion-preventing type colloidal magnesium-based heavy oil additive and a preparation method thereof. The heavy oil additive is prepared from the following components in parts by weight: magnesium oxide 50-80 parts, bentonite 10-15 parts, lime powder 5-10 parts, nano silicon dioxide 10-15 parts, basic copper chloride 5-10 parts, diaspore powder 10-15 parts, sodium dodecyl benzene sulfonate 2-8 parts, hydrocarbon solvent 2-8 parts, combustion-supporting dispersant 2-8 parts, and water 80-100 parts. The additive can inhibit the combustion of sulfur in the heavy oil to generate sulfur oxides, low-temperature sulfur corrosion and the synergistic corrosion of HCl. In the low-temperature section, the basic components such as lime powder react with HCl to generate salt compounds, neutralize the acidic substances in the flue gas, and significantly increase the pH value to above 8, thereby preventing the low-temperature dew point corrosion of the tail heating surface.

The method comprises a flue gas desulfurizing step using an ammonia-based desulfurizing scrubber to remove sulfur oxides from the flue gas A further step comprises processing the desulfurized flue gas through an ammonia-utilizing carbon dioxide capture unit, to remove carbon dioxide therefrom. The desulfurizing step comprises recycling desulfurized flue gas as an oxidant towards the desulfurizing scrubber. Also disclosed herein is a system for flue gas desulfurization and carbon dioxide removal.

The invention belongs to the technical field of flue gas sulfur oxide removal, and particularly relates to a flue gas desulfurization gypsum chloride ion concentration soft measurement method and system. The method comprises the following steps: S1, selecting characteristic variable data; s2, extracting online continuous monitoring data of chloride ion concentration in the desulfurization slurry; s3, determining a target variable; s4, screening out a final characteristic variable group; s5, performing data preprocessing on the final feature variable group; s6, establishing a training sample group based on a recurrent neural network model predictor; s7, training a preliminary recurrent neural network model; s8, obtaining a final prediction model; and S9, inputting a target characteristic variable group of the flue gas desulfurization gypsum to be measured into the trained recurrent neural network model to obtain the chloride ion concentration of the flue gas desulfurization gypsum to be measured. According to the method, the consumption of gypsum flushing water and the consumption of desulfurization wastewater treatment are reduced while the content of chloride ions in the desulfurization gypsum is ensured to reach the standard.

The present invention provides a sulfur-fixing additive for high-sulfur coal and a preparation method thereof. The sulfur-fixing additive for high-sulfur coal provided by the present invention comprises the following components by weight: 6-7 parts of calcium oxide, 2-3 parts of zinc chloride and (3-4 parts of magnesium oxide). The sulfur-fixing additive is mixed with raw coal in a weight percentage of 90-94% of raw coal and 6-10% of the sulfur-fixing additive, and then placed in an inert atmosphere for heating and pyrolysis, with a heating rate of 10°C / min and a termination temperature of 900°C, to obtain direct combustion of semi-coke, and to achieve sulfur-fixing and emission reduction during combustion. The sulfur-fixing additive for high-sulfur coal of the present invention can significantly reduce the release of sulfur oxides, and can significantly improve the high-temperature sulfur-fixing effect of the sulfur-fixing agent and the thermal efficiency of coal combustion, and has great prospects for promotion and application.

The utility model discloses a high-salinity wastewater electrochemical recycling synergistic coal-fired flue gas sulfur oxide removal system which comprises a bipolar membrane electrodialysis device, an air compressor, a spray gun and an SCR (Selective Catalytic Reduction) denitration device, the first spray gun sprays alkali mist formed by mixing and atomizing the alkali liquor and compressed air prepared by the air compressor into flues at the front end and the rear end of the SCR denitration device, and the alkali mist reacts with flue gas in the flues. High-salinity wastewater of the coal-fired power plant is electrolyzed through the bipolar membrane electrodialysis device, and product alkali liquor and compressed air are mixed, atomized and sprayed into flues at the front end and the rear end of the SCR denitration device. The alkaline liquor reacts with SO2 and SO3 in the flue gas, the content of sulfur oxides in the flue gas is reduced, damage, blockage and corrosion of ammonium bisulfate to related equipment are reduced, meanwhile, the acid liquor generated through electrolysis can also be used as a softening agent of a water treatment system in a plant, and the operation cost is reduced.