165 results about "Sulfur trioxide" patented technology

The invention belongs to the field of medicine, health and health, and particularly relates to a preparation method for controllably synthesizing polysulfonic acid mucopolysaccharide with different molecular weights, which comprises the following steps: reaction, acid-base neutralization, formamide removal by alcohol precipitation, desalting and freeze-drying. Wherein the reaction process comprises the following steps: adding sodium chondroitin sulfate and a pyridine sulfur trioxide complex into a mixed solvent of N, N-dimethylformamide and dimethyl sulfoxide, and heating for reaction to obtain a reaction mixture; the volume fraction of the dimethyl sulfoxide in the mixed solvent is 0-80%. According to the method, the low-price pyridine sulfur trioxide complex (about 150 yuan / 500g) is used, and the ratio of N, N-dimethylformamide to dimethyl sulfoxide in the mixed solvent is adjusted, so that the solubility of the chondroitin sulfate sodium and the pyridine sulfur trioxide complex is changed, and the polysulfonic acid mucopolysaccharide with molecular weights in different ranges can be regulated and generated.

The invention discloses a denitration and dust removal fault analysis system and method based on ammonia-sulfur ratio calculation, relates to the technical field of environment-friendly emission of coal-fired power plants, and realizes early warning and intelligent response to faults of a denitration system. The method comprises the following steps: collecting flue gas parameters, coal quality parameters and unit parameters; calculating the ammonia escape concentration based on the ammonia spraying amount in the flue gas parameters and the unit parameters to obtain an ammonia escape concentration predicted value; determining a sulfur dioxide concentration and a target conversion rate according to the coal quality parameters and the unit parameters, calculating a sulfur trioxide concentration according to the sulfur dioxide concentration and the target conversion rate, and calculating an ammonia-sulfur ratio according to the sulfur trioxide concentration and an ammonia escape concentration prediction value; determining the generation amount of ammonium bisulfate, and reading the equipment temperature in the unit parameters; and according to the ammonium bisulfate generation amount, the ammonia-sulfur ratio and the equipment temperature, determining an early warning grade and a response measure, adopting an execution mechanism module to execute the response measure, and sending an early warning signal corresponding to the early warning grade to a specified terminal.

Provided herein are methods and systems for treating a sulfur dioxide-containing gaseous stream. The method includes combusting a tail gas in an excess of oxygen gas to yield a thermal oxidizer effluent containing sulfur dioxide and oxygen. The thermal oxidizer effluent is introduced to an oxidative catalytic converter to convert sulfur dioxide to sulfur trioxide, thereby forming an oxidized gas stream. The oxidized gas stream is routed to a quench tower and contacted with a dilute aqueous acid quench stream to yield sulfurous acid, hydrated sulfur dioxide, or both. The sulfurous acid or hydrated sulfur dioxide is oxidized with the excess of oxygen from the thermal oxidizer effluent to yield sulfuric acid.

The invention discloses a treatment process and a treatment system for crystallization of photovoltaic wastewater calcium fluoride sludge, limestone particles and photovoltaic sludge are mixed according to a mass ratio of 3%-5% to obtain a homogeneous mixed material, the homogeneous mixed material is pre-dried and then fed into a rotary kiln, sintering is carried out at 1200-1500 DEG C for 1.5-3 hours, and the sintered material is cooled to room temperature. Calcium fluoride is attached to the surface of the silicate framework, sulfur trioxide and calcium oxide are released at the same time, after sintering is finished, the material is subjected to annealing treatment in a rotary kiln, calcium fluoride seed crystals accounting for 0.1%-1.0% of the total mass of the material are added, calcium fluoride crystals are induced to grow directionally and be repaired, and the calcium fluoride is obtained. According to the method, the purity of calcium fluoride is increased to 75%-85%, the sulfur content in the product can be controlled to be 0.1% or below, and the cold compressive strength of the pellets prepared from the product reaches 2.5 MPa or above.

The application discloses a flue gas recovery system in a calcination zinc sulfide process and relates to the technical field of zinc sulfide production. The flue gas recovery system comprises, which are connected by pipelines in sequence, a waste heat recovery boiler, a bag-type dust collector, an electrostatic precipitator, a mixed converter, a cyclone separator, an absorption tower and a spray tower. The mixed converter comprises an outer cavity, an inner cavity and a tail gas inlet pipe. The tail gas inlet pipe is connected with one end of the inner cavity. The outer cavity is provided with a medium inlet at the end far from the tail gas inlet pipe. The outer cavity is provided with a medium outlet at the end far from the medium inlet. The inner cavity is provided with a tail gas outlet pipe at the end far from the tail gas inlet pipe. An oxygen inlet and a powder inlet are installed on the side wall of the inner cavity. The inner cavity is internally provided with a turbulence column. Under the guidance of the turbulence column, the tail gas, oxygen and catalyst powder can be fully mixed, which can accelerate the reaction speed of sulfur dioxide and oxygen in the tail gas, thereby accelerating the generation speed and quality of sulfur trioxide.

The application relates to the technical field of biomass utilization, and relates to a continuous preparation technology of furfural from corncob, which comprises the following steps: S1: corncob is crushed into powder, then is mixed with sulfur trioxide, and is subjected to steam explosion under steam pressure; S2: acid catalysis-extraction reaction; S3: the once-extracted phase is subjected to solid-liquid separation, the liquid phase is subjected to secondary extraction by using an extracting agent, and a secondary extraction phase is obtained; S4: the once-extracted phase and the secondary extraction phase are combined and are sent into a rectifying tower for rectification, and furfural with a purity greater than 99% is obtained. The application has the beneficial effects that: 1. after the corncob is crushed, the corncob is mixed with sulfur trioxide and is subjected to steam explosion, hemicellulose can be effectively stripped from lignin, the subsequent reaction of preparing furfural from hemicellulose by acid catalysis can be more easily carried out, and the yield is higher; 2. in the method, acetic acid and aluminum chloride are used as mixed acid catalysts, the reaction temperature is reduced by 20-40 DEG C compared with one-pot method, and the reaction pressure is reduced by 0.4-0.7 MPa.G compared with one-pot method, so that the requirement of the reaction on equipment is reduced.

The invention relates to an aromatic hydrocarbon sulfonation method and system using sulfur trioxide, and relates to the technical field of fine chemical raw material synthesis, and the aromatic hydrocarbon sulfonation method using sulfur trioxide comprises the steps of reactant pumping, main reaction, temperature judgment, ambient temperature judgment I and ambient temperature judgment II. The reaction temperature can be adjusted under different temperature conditions, the probability of byproducts is gradually reduced in the reaction process, and then the generation of the byproducts is reduced after the reaction is finished.

The invention relates to the technical field of synthesis of ester compounds, in particular to a preparation method of an ester compound based on a sulfur trioxide compound. The method comprises the following steps: by taking a sulfur trioxide compound as a carboxylic acid activating agent and taking a carboxylic acid-containing compound and a hydroxyl-containing compound as raw materials, carrying out esterification reaction at room temperature in a reaction system of an alkali substance, a sodium salt stabilizer and a solvent, activating carboxylic acid by sulfur trioxide to form an active intermediate, and reacting the active intermediate with hydroxyl to generate an ester compound. The ester compound based on the sulfur trioxide compound is obtained, and sodium sulfate precipitate is obtained at the same time. According to the method, acyl chloride, thionyl chloride or unstable condensation reagents with high corrosivity are not used in the reaction, chlorine-containing wastewater is not generated, the reaction is carried out at room temperature, heating or high temperature is not used, the reaction condition is mild, the product is easy to separate, the use of organic solvents can be effectively reduced through post-treatment, and the product yield is relatively high.

A method for manufacturing electronic-grade sulfuric acid includes following steps: providing sulfur-containing material; burning the sulfur-containing material with pure oxygen to obtain sulfur dioxide gas; converting the sulfur dioxide gas into sulfur trioxide gas; and processing the sulfur trioxide gas to obtain the electronic-grade sulfuric acid.

The utility model provides a sulfur trioxide gas condenser which comprises a condensing box, a cooling assembly is arranged in the condensing box, an auxiliary heat dissipation assembly is arranged in a water storage base, and cooling water in the water storage base is conveyed into a plurality of water guide vertical pipes through a water inlet pipe and a flow dividing shell by a circulating pump; the cooling water can cool the water guide vertical pipe, so that the water guide vertical pipe absorbs heat and cools sulfur trioxide gas entering the condensation box through the heat conduction filler, the heat absorption sleeve and the heat absorption fins, and meanwhile, the travel path of the sulfur trioxide gas in the condensation box can be prolonged through the multiple baffles which are arranged in a staggered mode. Therefore, the axial flow fan can blow air to the interiors of the multiple heat absorption pipes through the connecting shell for cooling, so that the multiple heat absorption pipes adsorb most heat of cooling water in the water storage base, and the situation that the heat of the cooling water in the water storage base is easily accumulated is avoided.

A chemical synthesis method for the Klebsiella toxin Tilimycin relates to the field of biomedical chemical analysis and synthesis technology. The method includes the following steps: (1) mixing bis(trichloromethyl) carbonate dissolved in a polar aprotic solvent with 3-hydroxy-an-aminobenzoic acid in a certain proportion to undergo a substitution reaction, heating and stirring to obtain intermediate product 1; (2) mixing intermediate product 1 with (S)-2-pyrrolidone dissolved in a polar aprotic solvent in a certain proportion to undergo ammonolysis and hydrolysis reactions, heating and stirring, filtering, and purifying by prep-HPLC to obtain intermediate product 2; (3) mixing intermediate product 2 with pyridine sulfur trioxide dissolved in a polar aprotic solvent and DCM in a certain proportion under alkaline conditions to undergo oxidation and amination reactions, stirring at low temperature, vacuum drying, and purifying by prep-HPLC to obtain the target compound Tilimycin. This invention enables the efficient synthesis of the Klebsiella toxin Tilimycin with high purity and good stability, thus providing a material basis and technical method for scientific research related to this toxin.

To provide a method for producing a hydraulic hardened body, which reduces the amount of energy consumption and the amount of CO2 discharge in material production and is excellent in producibility of a precast product.SOLUTION: A method for producing a hydraulic hardened body includes kneading and hardening a hydraulic composition containing a binder (A), an admixture (B), water, an aggregate, and an admixture, wherein the proportion of the admixture (B) in the total of the binder (A) and the admixture (B) is 2 mass% to 10 mass%. In the binder (A), the proportion of the high-early-strength portland cement is 20 mass% to 55 mass%, the proportion of the blast furnace slag fine powder is 45 mass% to 75 mass%, and the total of these two components accounts for 90 mass% or more of the whole. The admixture (B) contains organic calcium salts, inorganic calcium compounds, and inorganic sulfates, and has a CaO content of 53 mass% to 58 mass%, a SO3 content of 15 mass% to 20 mass%, a total alkali content of 2.5 mass% to 2.8 mass%, and an ignition loss of 20 mass% to 25 mass%.SELECTED DRAWING: None

The invention discloses a resin catalyst for synthesizing CPME and a preparation method and application thereof, and belongs to the technical field of fine chemical catalysis, and the preparation method comprises the following steps: by taking styrene, divinyl benzene and 4-vinyl cyclohexene as monomers, carrying out suspension copolymerization in the presence of a pore-foaming agent, a dispersing agent, an initiator and a water-phase polymerization inhibitor to prepare a copolymer white ball, and then carrying out extraction, washing and drying to obtain the resin catalyst for synthesizing CPME. And drying, screening, sulfonating with sulfur trioxide, and washing to obtain the product. According to the invention, a third monomer 4-vinyl cyclohexene is introduced into a traditional styrene-divinyl benzene copolymerization system, and the rigid cyclic structure can significantly enhance the thermal stability of a resin skeleton; the perfluorinated chain segments in the dispersant can be directionally arranged to the surfaces of resin particles in the polymerization process to form a hydrophobic protection layer, so that the stability of a catalyst and the selectivity of cyclopentene at a relatively high temperature can be remarkably improved.

The present application relates to a kind of methods and devices for preparing anhydrous hydrogen fluoride and sulfuric acid.The method comprises the following steps: removing impurities from industrial waste fluorosulfuric acid, mixing it with concentrated sulfuric acid to form a pretreated mixture; using microwave heating to rapidly heat the reactor, a static bed is arranged in the reactor; the pretreated mixture is passed into the upper surface of the static bed in the preheated reactor, the pretreated mixture is heated by microwave, and hydrogen fluoride and sulfur trioxide gas are generated by the decomposition of the pretreated mixture; hydrogen fluoride and sulfur trioxide are mixed and passed into low-temperature concentrated sulfuric acid to absorb sulfur trioxide gas; then passed into low-temperature condensing equipment, and liquid hydrogen fluoride is collected; the liquid hydrogen fluoride is purified by rectification; and the concentrated sulfuric acid that absorbs sulfur trioxide is evaporated and concentrated.The advantages are: using a "static bed + material" double-wave absorption system, achieving more uniform and stable temperature field distribution in the liquid layer of industrial waste fluorosulfuric acid, making the pyrolysis of industrial waste fluorosulfuric acid more efficient and stable.

The utility model discloses a system for preparing concentrated sulfuric acid by regenerating dilute sulfuric acid of an alkylation device. The system comprises a raw material pretreatment unit, an incineration conversion unit, a product purification and absorption unit and a tail gas treatment unit, the raw material pretreatment unit is used for carrying out drying, liquid separation, mixing and preheating on used air, hydrogen sulfide and dilute sulfuric acid raw material gas and then conveying the raw material gas to the incineration conversion unit; the incineration conversion unit is used for converting hydrogen sulfide and dilute sulphuric acid into sulfur trioxide gas under the action of oxygen-enriched air and a catalyst, and the sulfur trioxide gas generated by the incineration conversion unit enters the purification and absorption unit; the product purification and absorption adopts concentrated sulfuric acid to absorb sulfur trioxide gas to generate a concentrated sulfuric acid product, and acid-containing tail gas generated by purification and absorption enters a tail gas treatment unit to be treated. According to the device, co-combustion of hydrogen sulfide and dilute sulfuric acid in the incinerator is achieved, concentrated sulfuric acid with high concentration is obtained through subsequent conversion, purification, absorption and tail gas treatment, and cyclic regeneration of sulfuric acid is achieved.

The application belongs to the technical field of biological medicine, and relates to synthesis of a medicine, in particular to a preparation method of picrosulfa sodium. Phenol and 2-pyridine formaldehyde are used as raw materials, trifluoroacetic acid and formic acid are used as reaction solvents, concentrated sulfuric acid is added dropwise, 4,4'-(2-pyridine methylene)-bisphenol crude product is obtained after the reaction is completed, the 4,4'-(2-pyridine methylene)-bisphenol crude product is refined to obtain 4,4'-(2-pyridine methylene)-bisphenol pure product; the 4,4'-(2-pyridine methylene)-bisphenol pure product is subjected to a sulfonation reaction by using sulfur trioxide pyridine complex, and then subjected to an alkali neutralization reaction to obtain picrosulfa sodium crude product, and the picrosulfa sodium crude product is refined to obtain picrosulfa sodium pure product. The application can reduce the generation of isomers, improve the yield, is suitable for industrial production, and the prepared picrosulfa sodium meets the requirements of the quality standard of the European Pharmacopoeia.

The invention is directed to a process for producing a sulfur trioxide-containing gas stream. A sulfur dioxide and oxygen containing gas are introduced in at least one converter stage to produce a sulfur trioxide-containing gas stream in a heterogeneous catalysation. In doing so a partial stream of a sulfur trioxide containing gas stream produced in the first or a subsequent converter stage is branched off as a recycling stream and recycled to be part of a feed gas of the first converter stage. It is essential that he sulfur dioxide containing gas and added oxygen are introduced as a motive medium in an ejector via an motive medium inlet such that it sucks in and accelerates the recycling stream through a sucking medium inlet as a sucking medium to produce a feed gas streaming through a discharge outlet for the converter stage at a set pressure range.

The invention discloses a method and a system for utilizing sodium sulfate to assist sulfuric acid decomposition in sulfur-iodine cycle hydrogen production. On the basis of not changing an existing sulfur-iodine cycle main body, sodium sulfate is utilized to assist sulfuric acid decomposition in a sulfuric acid decomposition link; the system provided by the invention comprises a concentrated sulfuric acid absorption tower, a sulfur trioxide decomposition tower, a sulfur trioxide decomposition gas-liquid separator, a sulfur trioxide storage tank and a sulfur trioxide feeding pump, and the concentrated sulfuric acid absorption tower is filled with anhydrous sodium sulfate which is excessive relative to the input concentrated sulfuric acid. The process of decomposing sulfuric acid into sulfur dioxide is divided into a plurality of small steps, and strong corrosivity caused by the fact that sulfuric acid needs to be heated to high temperature is avoided. The water and sulfur trioxide generated by decomposition are directly separated by controlling the temperature gradient, compared with the prior art, the generated water does not need to be heated to high temperature, the energy input of the decomposition tower is reduced, and the total energy efficiency is improved.

Provided is an electrode arrangement configured for detecting humic and fulvic acids in a soil matrix by means of squarewave voltammetry. The electrode arrangement comprises a working electrode with a coating comprising an admixture of ionic liquid 1-butyl-3- methylimidazolium tetrafluoroborate (BMIM-BF4) and sulfonated tetrafluoroethylene-based fluoropolymer-copolymer - sulfur trioxide (SO3) at a molar ratio of 1:1, sulfonated tetrafluoroethylene-based fluoropolymer-copolymer to carbon particles at a mass ratio in a range of between 1:10 and 1:15, sulfonated tetrafluoroethylene-based fluoropolymer-copolymer to polymeric adsorbent non-ionic aliphatic acrylic resin at a mass ratio in a range of between of 1:50 and 1:60, and a cross-linked hydrogel.

The invention relates to the technical field of gas treatment, and discloses an environment-friendly gas-liquid separation tank with a condensation separator structure, which comprises a tank body, a fan is assembled on the tank body through a gas phase output pipe arranged at the top of the tank body, the output end of the fan is connected with an external gas conveying pipeline, and an input pipe and a liquid phase output pipe are sequentially assembled on the outer surface of the circumference of the tank body from top to bottom; and a separation part for treating gas-phase components is arranged in the tank body. The environment-friendly gas-liquid separation tank with the condensation separator structure can effectively solve the problems that in the prior art, the laying distance of a gas separation pipeline is often long, a large amount of sulfur trioxide is contained in a gas-phase component, in the long-distance conveying process, sulfur trioxide is extremely prone to being condensed on the inner wall of the pipeline, and the gas-liquid separation effect is poor. The problem that the pipeline is blocked due to the fact that viscous substances or solid sediments are generated by chemical reaction with residual water and impurities in the pipeline is solved.

The utility model relates to equipment for producing sulfuric acid. The equipment comprises at least one reactor for producing sulfur dioxide-containing gas with the quantity of a; a pre-converter for reacting a feed gas comprising at least a portion of the sulfur dioxide-containing gas and added oxygen to produce a sulfur trioxide-containing gas stream; a recovery conduit for branching off a partial stream of the sulfur trioxide-containing gas stream and recovering it into the pre-converter or into the feed gas of the pre-converter; a pre-conversion absorber for absorbing the remaining portion of the sulfur trioxide-containing gas stream with sulfuric acid to produce a liquid sulfuric acid stream and a remaining sulfur dioxide-containing gas; and a conventional sulfuric acid plant comprising at least one contact stage of a main converter for reacting sulfur dioxide with oxygen to produce sulfur trioxide and at least one absorber for absorbing the produced sulfur trioxide in sulfuric acid, where the capacity of the amount of converted sulfur dioxide of the conventional sulfuric acid plant is lower than the amount a.

This invention discloses a high-efficiency sulfur trioxide form conversion pretreatment device and detection method. The high-efficiency sulfur trioxide form conversion pretreatment device includes a first heating component, a sampling tube, an adsorption element, and a second heating component. The sampling tube is disposed within the first heating component, which heats the sampling tube to a first preset temperature to vaporize the water in the sample gas, thereby separating the water and sulfuric acid in the sample gas. The adsorption element is disposed within the sampling tube and adsorbs the sulfuric acid in the sample gas, thereby separating the sulfuric acid and water vapor in the sample gas. The second heating component is disposed within the adsorption element and heats the adsorption element to a second preset temperature, thereby decomposing the sulfuric acid in the adsorption element into sulfur trioxide and water. The high-efficiency sulfur trioxide form conversion pretreatment device of this invention has the advantages of simple structure, low cost, and high conversion efficiency.

The invention discloses a wet-process acid-making condensation system with pre-cooling and catalytic oxidation functions, which belongs to the technical field of wet-process acid-making equipment and comprises a process gas inlet, an acid condenser main body and a tail gas outlet, a special cooling device and a catalytic oxidation module are sequentially arranged between the process gas inlet and the acid condenser main body in the process gas flow direction, and the special cooling device is used for cooling process gas entering the catalytic oxidation module to 260 DEG C or below; the catalytic oxidation module is filled with a sulfur dioxide oxidation catalyst suitable for a low-temperature, high-humidity and acid mist-containing environment; and the acid condenser main body is used for condensing sulfur trioxide in the process gas treated by the catalytic oxidation module and generating sulfuric acid. The catalytic oxidation module is integrated at the front section of the acid condenser and is matched with a special cooling technology, so that the total conversion rate of sulfur dioxide is remarkably increased, the emission of tail gas sulfur dioxide reaches the standard, the sulfur recovery rate is increased, and the tail gas treatment difficulty, the investment cost and the operation cost of a heat exchange acid making system are effectively reduced.

Provided herein are methods and systems for treating a sulfur dioxide-containing gaseous stream. The method includes combusting a tail gas in an excess of oxygen gas to yield a thermal oxidizer effluent containing sulfur dioxide and oxygen. The thermal oxidizer effluent is introduced to an oxidative catalytic converter to convert sulfur dioxide to sulfur trioxide, thereby forming an oxidized gas stream. The oxidized gas stream is routed to a quench tower and contacted with a dilute aqueous acid quench stream to yield sulfurous acid, hydrated sulfur dioxide, or both. The sulfurous acid or hydrated sulfur dioxide is oxidized with the excess of oxygen from the thermal oxidizer effluent to yield sulfuric acid.

A method for removing sulfur oxides and nitrogen oxides from air flow belongs to the technical field of air pollution control, and is characterized in that treated air flow is introduced into a desulfurization reactor, a nitric acid solution absorbent is introduced into the reactor, sulfur dioxide in the air flow and nitric acid in the absorbent are subjected to an oxidation-reduction reaction, and the sulfur oxides and the nitrogen oxides are removed. Nitric oxide gas generated in the reaction process of the sulfur dioxide and nitric acid is guided into a denitration reactor along with the gas flow, meanwhile, ferric chloride absorbent slurry is guided into the denitration reactor, and the nitric oxide gas in the gas flow and ferric chloride are subjected to a chemical reaction to be absorbed; nitric oxide gas released by regeneration of the saturated absorbent after absorption is oxidized, nitric acid is recycled as a desulfurization absorbent for recycling, and ferric salt absorbent slurry is recycled after regeneration.

A dilute sulfuric acid manufacturing apparatus (40) includes: a pipe (42) or the like that supplies a raw material containing at least a sulfur component, a nitrogen component, and 40 to 80% by weight or more of moisture; a PVSA 45d or the like that generates an oxygen-containing gas having an oxygen concentration of 22 to 40% by volume; a combustion furnace (51) that combusts the raw material using the oxygen-containing gas to generate a combustion gas containing sulfur oxides (SOx: here, 1 ≤ x < 3) and 10% by volume or more of moisture; a waste heat boiler (52) that cools the combustion gas; a converter (61) that oxidizes the sulfur oxides (SOx) using a catalyst to generate a reaction gas containing sulfur trioxide (SO3); and a dilute sulfuric acid tower (71) that cools the reaction gas to generate dilute sulfuric acid, and does not add water from at least the combustion furnace (51) up to the dilute sulfuric acid tower (71), and generates dilute sulfuric acid of less than 90% by weight using only the moisture of the raw material.

The application discloses a multi-stage fuming sulfuric acid absorption tower and a process method for absorbing sulfur trioxide by using the fuming sulfuric acid absorption tower. The multi-stage fuming sulfuric acid absorption tower comprises a primary absorption assembly and a secondary absorption assembly. The primary absorption assembly is provided with a first containing cavity. A first acid distributor is arranged in the first containing cavity and is arranged close to the upper wall surface of the first containing cavity and used for spraying acid liquid into the first containing cavity. The primary absorption assembly is provided with a flue gas inlet communicated with the first containing cavity. The secondary absorption assembly is arranged above the primary absorption assembly. The secondary absorption assembly is provided with a second containing cavity. The second containing cavity is communicated with the first containing cavity and used for receiving flue gas from the first containing cavity. A second acid distributor is arranged close to the upper wall surface of the second containing cavity and used for spraying acid liquid into the second containing cavity. The upper end of the secondary absorption assembly is provided with a flue gas outlet communicated with the second containing cavity. In this way, the sulfur trioxide absorption rate can be improved, and the product purity can be ensured.

The invention provides a process for inhibiting dioxane and unsulfonated substances in AES production, which comprises the following steps: (1) adding a composite inhibitor into a fatty alcohol-polyoxyethylene ether raw material for pretreatment, the composite inhibitor being composed of citric acid and EDTA (Ethylene Diamine Tetraacetic Acid); (2) carrying out sulfonation reaction on the pretreated raw materials by adopting sulfur trioxide; (3) neutralizing a sulfonated product; (4) sequentially carrying out water washing-azeotropic distillation and nanofiltration membrane separation on the neutralized product; and (5) drying to obtain a high-purity AES product. Synchronous removal of unsulfonated substances is realized, and an unexpected synergistic effect is generated through a composite inhibitor in a specific proportion.

In a method for physical and thermochemical treatment of biomass, the biomass moisture content is reduced in a dryer and ammonia (NH3) is also released from the biomass during drying. The dried biomass is then either pyrolyzed in a pyrolysis reactor and the pyrolysis gas is forwarded to and combusted in a combustion device to form flue gas, or is combusted in a combustion facility unit to form flue gas. In either case the flue gas is fed to a mixer. Oxygen (O2) is metered to the flue gas in the mixer and is fed directly to the dryer as drying gas. As the drying gas passes through the dryer, the sulfur dioxide (SO2) contained in the drying gas and / or the sulfur trioxide (SO3) chemically reacts with the ammonia (NH3) to form ammonium sulfite ((NH4)2SO3) and / or ammonium sulfate ((NH4)2SO4). Also a treatment facility physically and thermochemically treats the biomass.

The application discloses a method for resource utilization of desulfurization waste liquid, and relates to the technical field of chemical waste liquid treatment, and comprises the following steps: S1, filtering equipment is used to filter dilute sulfur foam liquid generated by a desulfurization system to obtain concentrated sulfur foam liquid and filtered clear liquid; S2, separation equipment is used to separate the concentrated sulfur foam liquid to obtain liquid sulfur and separated clear liquid; S3, evaporation concentration equipment is used to treat the separated clear liquid to obtain concentrated salt liquid, and non-condensable gas generated by the evaporation concentration equipment is transported into a coking coal gas negative pressure pipeline; S4, the liquid sulfur and part of the concentrated salt liquid are fed into solidification equipment to obtain salt-containing crude sulfur; and S5, the salt-containing crude sulfur and part of the concentrated salt liquid are fed into an incinerator to obtain sulfur dioxide-containing flue gas, and the sulfur dioxide-containing flue gas is used for producing concentrated sulfuric acid or liquid sulfur trioxide. The method can realize clean and efficient resource utilization of the desulfurization waste liquid.