73 results about "CALCIUM HYDROXIDE SOLUTION" patented technology

The invention relates to a low-cost and air-corrosion-resistant steel fiber modification method and application thereof in UHPC, and the steel fiber modification method specifically comprises the following steps: mixing a saturated calcium hydroxide solution with glycerol to obtain a modification liquid, then soaking steel fibers in the obtained modification liquid, standing and modifying, and then drying to obtain the steel fibers. And finally taking out the steel fiber and drying to obtain the modified steel fiber. According to the steel fiber modification method, common industrial raw materials and by-products can be adopted as raw materials, the cost is low, the modification process is non-toxic and harmless, the steps are simple, and industrial application is easy.

The invention relates to the technical field of gypsum fiberboard raw material treatment, in particular to a plant fiber for a gypsum fiberboard and a preparation method and application thereof. Compared with the prior art, the preparation method provided by the invention adopts specific process steps, plant fiber raw materials are softened by using a supersaturated calcium hydroxide solution to partially remove lignin, the treated plant fiber slurry is introduced into a sulfuric acid solution for neutralization in the water washing process, and generated nano-scale calcium sulfate particles are attached to the surfaces of the plant fibers, so that the surface of the plant fibers is uniform. The plant fiber coagulant plays a role of a coagulant during production of the gypsum fiberboard, and the plant fiber meeting the requirements of production of the gypsum fiberboard is prepared. The preparation method provided by the invention is low in cost, and the gypsum fiberboard prepared from the obtained plant fiber for the gypsum fiberboard has relatively high mechanical property indexes and meets the performance requirements of boards for building decoration.

The utility model discloses an ammonium sulfate wastewater treatment system which comprises an ammonium sulfate wastewater storage pool used for collecting ammonium sulfate wastewater, the calcium hydroxide preparation system is used for preparing a calcium hydroxide solution, an evaporator and a first circulating heater and is used for reacting ammonium sulfate wastewater and calcium hydroxide and heating and evaporating; the first crystallizer and the second circulating heater as well as the second crystallizer and the third circulating heater are used for two times of evaporative crystallization, a final concentrated solution is filtered by the filter and then flows into the mother liquor collecting tank to facilitate wastewater treatment, and evaporated ammonia gas is absorbed by the cooling absorption tower and the condensate collecting tank to form ammonia water; and condensate water of the second heat exchanger, the first circulating heater, the second circulating heater and the third circulating heater also flows back to the condensate collecting pool. According to the wastewater treatment system, ammonium sulfate wastewater and a calcium hydroxide solution are distilled and crystallized, so that calcium sulfate and ammonia water can be recovered, and waste utilization is realized.

The invention discloses a calcium-based incrustation deposition experimental device and experimental method. The device comprises a reaction container, a sensor module, a control unit, an automatic solution supply device and a carbon dioxide gas supply unit. The sensor module monitors the pH value of the reaction liquid and the concentration of calcium hydroxide in real time; the control unit receives the data and compares the data with a preset threshold value to control the supply device to automatically add the calcium hydroxide solution so as to maintain the stability of chemical parameters; gas is introduced into the carbon dioxide supply unit at a controllable flow rate. The experimental method comprises the following steps: setting and initializing parameters; starting constant temperature and gas introduction; the system automatically runs, and the conditions are kept stable through real-time monitoring, threshold comparison and automatic supply; and after the experiment is finished, sampling and analyzing the sediment, and exporting process data for analysis. According to the method, the problems of parameter drift and frequent manual intervention in a traditional method are solved, and the repeatability and automation level of experiments and the scientificity of data are remarkably improved.

This invention relates to the field of exhaust gas treatment technology, and more particularly to an exhaust gas treatment device for steel tailings treatment. The device includes a base plate, a workbench on top of the base plate, a support on top of the workbench, and a mounting shell on the left side of the top of the support. A first pipe is mounted on the mounting shell, and a second pipe is connected to the right side of the first pipe. The dust removal component of this device uses a servo motor-driven rack and pinion transmission to achieve dynamic switching of multiple filter plates. This allows for the replacement of clogged filter plates without stopping the machine, ensuring continuous dust removal operations. Simultaneously, the double-layer filtration structure improves the interception effect of large particulate impurities. The jet stirring component, in conjunction with the drive component, enables the three treatment chambers to rotate and stir synchronously, ensuring full contact between the exhaust gas and the calcium hydroxide solution. This significantly increases the acid-base neutralization reaction rate, reduces the residue of pollutants such as calcium sulfite and lead hydroxide, and improves the exhaust gas purification effect.

The invention discloses a precipitation-loaded slow-release carbon-based iron fertilizer and a preparation method thereof. The preparation method specifically comprises the following steps: firstly, a biological crustacean heavy metal adsorbent is immersed in a calcium hydroxide solution, dried, and then immersed in a ferrous sulfate solution twice, and finally dried and granulated. The slow-release iron fertilizer is loaded by precipitation, and a precipitated ferric hydroxide, ferrous hydroxide mixture and excess ferric sulfate are uniformly dispersed and attached to the inside of pores of a porous adsorbent. Excess ferric sulfate can quickly provide iron ions to antagonize cadmium and arsenic ion absorption in the early growth stage of rice. Calcium sulfate encapsulates the precipitated ferric hydroxide and ferrous hydroxide in the porous adsorbent, which can achieve long-term slow-release of iron ions and reduce soil oxygen content. Iron ion antagonism is performed throughout the entire rice growth process. The precipitation-type adsorption loading method greatly increases the release cycle of the iron ions. The iron fertilizer of the invention has an excellent cadmium and arsenic antagonistic effect on rice and has excellent application prospects.

The present invention provides a production method for recycling carbide slag to produce neopentyl glycol and calcium formate. The method uses carbide slag slurry containing calcium hydroxide solution, which is made from carbide slag produced by the acetylene method for producing PVC, as a catalyst and adds it to the condensation reaction for preparing neopentyl glycol using isobutyraldehyde and formaldehyde as raw materials. The present invention uses a large amount of solid waste carbide slag containing calcium hydroxide produced by the acetylene method for producing PVC as a catalyst for the disproportionation method, solving the problem of difficult utilization of carbide slag. At the same time, it solves the problem that when directly adding calcium hydroxide solution as a catalyst, calcium formate wall sticking is likely to occur. The solid formed by calcium formate wall sticking has the characteristics of strong adhesion and compactness, which is difficult to clean. The cleaning cost is high and it is easy to cause equipment blockage and shutdown. In severe cases, the equipment cannot be cleaned and is abandoned. In addition, by adding a crystal form finishing agent to the condensation reaction solution, the crystallization mode of calcium formate and the size of crystallization particles can be changed, improving the purity and quality of calcium formate and neopentyl glycol.

The invention discloses a hydrogen resistance and anti-oxidation method for the inner walls of a pressure container, a bottle, a pipeline and a valve, which comprises the following steps of: (1) performing sand blasting or internal grinding treatment on the surface of the inner wall of a high-pressure hydrogen storage container, and removing oxide skin; (2) vacuumizing the treated container to 0.1-1.0 MPa or replacing with N2, and introducing a mixed gas composed of 75-85% by volume of fluorine and 15-25% by volume of nitrogen; (3) rotating the container at a constant speed of 5-20 revolutions per minute for 30-120 minutes, so that the mixed gas is uniformly attached to the surface of the inner wall to form a fluoride protective film; and (4) standing for 24 hours, exhausting gas, and introducing the exhausted gas into a calcium hydroxide solution at 20-60 DEG C to react to generate marble. According to the 30CrMo steel treated through the method, after a 72-hour hydrogen permeation test, the corrosion rate is reduced to 0.01 mm / a or below, and the hydrogen permeability is reduced by 92%; the tensile strength retention rate of the substrate is greater than or equal to 95% and is superior to that of a high- The friction coefficient of the fluoride film is less than or equal to 0.1 and is obviously reduced compared with nickel-plated Marble generated from tail gas can be recycled, and fluorine-free gas is directly discharged.

This invention discloses an ammonium sulfate wastewater treatment system and method, comprising an ammonium sulfate wastewater storage tank for collecting ammonium sulfate wastewater; a calcium hydroxide preparation system for preparing calcium hydroxide solution; an evaporator and a first circulating heater for reacting and evaporating the ammonium sulfate wastewater and calcium hydroxide; a first crystallizer and a second circulating heater, a second crystallizer, and a third circulating heater for two-stage evaporation and crystallization; the final concentrated liquid is filtered and flows into a mother liquor collection tank for convenient wastewater treatment, while the evaporated ammonia gas is absorbed by a cooling absorption tower and a condensate collection tank to form ammonia water; the condensate from the second heat exchanger, the first circulating heater, the second circulating heater, and the third circulating heater is also returned to the condensate collection tank. This wastewater treatment system and method distill and crystallizes ammonium sulfate wastewater with calcium hydroxide solution, thereby recovering calcium sulfate and ammonia water, thus achieving waste utilization.

The invention relates to the technical field of inorganic salt mother liquor treatment, in particular to an inorganic salt mother liquor recycling system based on MVR evaporative crystallization, which comprises three groups of sedimentation tanks and separation cylinders fixedly communicated with the bottoms of the sedimentation tanks, stirring components and sealing conical seats are arranged in the separation cylinders, and the tops of the sedimentation tanks are connected with liquid storage hoppers through liquid inlet pipes. An electromagnetic control valve is arranged on the liquid inlet pipe, and a calcium hydroxide solution, a sodium carbonate solution and a barium chloride solution are sequentially arranged in the multiple liquid storage hoppers from left to right; through staged treatment of the three groups of sedimentation tanks, the ion selective electrode sensor and the controller are combined to precisely add corresponding agents, the hetero ions are removed step by step in a targeted manner, and the subsequent progressive deep purification treatment is matched, so that a high-quality water quality basis is provided for efficient recycling of the mother liquor; and the problems of crystal quality reduction, equipment scaling and the like caused by hetero-ion enrichment are effectively avoided.

The application relates to the technical field of flue gas desulfurization, and discloses a full-oxygen combustion glass melting furnace flue gas desulfurization device, which comprises a mounting plate, a plurality of purification boxes are fixedly connected to the top of the mounting plate, the device is used for feeding flue gas into the purification boxes, then spraying atomized calcium hydroxide solution into the purification boxes, so that the calcium hydroxide solution is fully and sufficiently sprayed, the sulfur dioxide in the flue gas is ensured to fully contact and react with the calcium hydroxide solution, meanwhile, the transmission shaft drives the transmission screw rod to rotate, the airflow in the purification box is disturbed, the mixing and contact of the flue gas and the calcium hydroxide solution are further promoted, in the spraying process, the electric telescopic rod drives the extrusion plate to extrude the gas in the purification box to the middle, the pressure in the purification box is increased, the flow of the calcium hydroxide solution and oxygen is accelerated, and more sufficient reaction is promoted, so that the sulfur dioxide in the flue gas is efficiently purified and removed.

The invention relates to an earthen archaeological site loose soil body disease strengthening method, and relates to the field of archaeological site soil body protection and restoration. An earthen archaeological site loose soil body disease strengthening method comprises the following steps that a calcium hydroxide solution is injected into a loose soil body, and preliminary cohesive soil is obtained after standing; uniformly spraying a silicate solution on the surface of the primary binding soil, repeatedly spraying for three times, and standing to obtain binding soil; in-situ silty soil of loose soil is evenly sprayed on the surface of the binding soil, the binding soil is covered and then stricken off, and solidified soil is obtained after drying. A calcium hydroxide solution reacts with carbon dioxide to generate a calcium carbonate crystal'cementation bridge ', insoluble calcium salt is formed through ion exchange, a stable framework is built from the inside, and migration of soluble salt is inhibited; the silicate solution forms a silicon-oxygen network reinforcing film with stable chemical properties through a sol-gel reaction, external erosion is prevented, and meanwhile, the silicate solution and calcium carbonate crystals are interwoven to reinforce a structure; therefore, long-term influence of natural environment is effectively resisted, and soil strength is maintained.

This invention discloses a method for the utilization of gas field water resources, specifically including the following steps: Step 1, gas field water treatment: adjusting the pH value to 11-12. Step 2, filtration: solid-liquid separation to obtain precipitate and treated gas field water. Step 3, electrolysis: the gas field water treated in Step 2 undergoes ion-exchange membrane electrolysis to obtain chlorine and hydrogen gas. Step 4, calcination: calcining the precipitate from Step 2 to constant weight. Step 5, dissolution: dissolving in water after calcination. Step 6, filtration: solid-liquid separation to obtain strontium carbonate precipitate and calcium hydroxide solution. Step 7, CO2 introduction: the calcium hydroxide solution reacts with CO2 to obtain calcium carbonate precipitate. This method achieves effective utilization of gas field water resources.

The invention discloses a preparation method and application of tilmicosin, and the tilmicosin is prepared by the following steps: step (1), carrying out ball milling on bran and tilmicosin phosphate to obtain a material A; (2) taking the material A, adding a calcium hydroxide solution, dehydrating, and introducing carbon dioxide to obtain a material B; and (3) taking the material B, soaking and dehydrating the material B in an alginic acid substance solution to obtain a material C, further adding the material C into a coagulator solution under a stirring condition, dehydrating the material C to obtain a material D, finally adding the material D into a dopamine solution, and drying and dispersing the material D to obtain tilmicosin. The particles adsorbed with tilmicosin are coated with the alginic acid derivative and the polydopamine, feeding is easy, and long-acting protection on poultry is achieved.

The invention provides a method for preparing high-purity zinc sulfate from side-blown converter copper smelting smoke dust, and relates to the technical field of smoke gas recovery, and the method comprises the following steps: S1, water leaching; s2, replacing and depositing copper; s3, neutralizing, oxidizing and removing arsenic; s4, neutralizing to remove iron, and adding a calcium hydroxide solution (20% water suspension) to obtain ferric hydroxide; s5, replacing and precipitating cadmium, adding 1.2 times of zinc powder into the neutralized liquid according to the content of cadmium, reacting for 2-3 hours at the temperature of 60-80 DEG C, and performing solid-liquid separation to obtain sponge cadmium; and S6, after cadmium removal, adding the filtrate into a concentration kettle for evaporation and concentration, feeding the prepared concentrated material into a centrifugal machine for centrifugal separation, returning the separated liquid to the concentration kettle, and carrying out flash evaporation sieving treatment on the separated solid at 180 DEG C to prepare zinc sulfate powder. The purity of the zinc sulfate product is high, and the requirements of different fields for high-quality zinc sulfate can be met.

The application relates to the technical field of building materials, and discloses a preparation method of maintenance-free concrete, and the specific steps are as follows: S1. binding steel bars, wherein the steel bars are provided with porous steel pipes, and the porous steel pipes are filled with water-saturated sand washing or water-absorbing resin; S2. erecting a concrete heat insulation template; S3. spraying silica sol or saturated calcium hydroxide solution on the surface of concrete aggregates, and pouring concrete, wherein the concrete contains fiber tubes, cellulose and cellulose fibers; and S4. after the concrete is poured and initial setting, before final setting, spraying a concrete protective layer material on the surface of the concrete, and then carrying out second-time troweling and light receiving. The application solves the problem that the performance of the concrete is greatly reduced when the maintenance condition is not met.

The application discloses a kind of desulfurization wastewater and sintering dust's collaborative processing method, including s1, after mixing stirring of sintering dust and desulfurization wastewater, solid-liquid separation is carried out, and supernatant separated is treated to remove hardness;S2, after treating to remove hardness, flocculation, precipitation treatment is carried out, and the filtrate of the sludge of precipitation and the supernatant of precipitation unit are filtered and then treated by brine conditioning tank, then enter pH adjusting tank, finally, evaporation crystallization is carried out to obtain potassium chloride and sodium chloride crystalline salt, the reagent of the reagent for treating to remove hardness is prepared into solution using water in brine conditioning tank;Flocculation treatment is prepared into solution using condensate produced by evaporation crystallization;Calcium hydroxide solution and sodium carbonate solution are prepared using water in brine conditioning tank, and flocculant solution is prepared using condensate in evaporation crystallization unit, not only save the use of fresh water, but also use the residual alkalinity generated by the excess of dosing amount of hardening-removing reagent, and the dosing amount of hardening-removing reagent is further saved by pH feedback control.

The invention provides a test cabinet for a plurality of semi-open energy storage lithium ion batteries, each layer of square frame type accommodating bin forms a sealing cavity through a front sealing baffle and a rear sealing baffle, and an injection pipeline system of the test cabinet is connected with first ports of the semi-open batteries. When the battery breaks down in the formation test stage, the pressure in the battery reaches a preset value, so that the one-way pressure valve of the second port of the battery is opened, the fault detection sensor transmits a signal to the control device, and the control device opens the electromagnetic valve of the first port of the battery; a calcium hydroxide solution is injected into the battery through an injection pipeline system of the test cabinet. And the calcium hydroxide solution together with the gas and the electrolyte is discharged into the sealing cavity from the second port of the battery, the gas is discharged through the waste discharge pipeline, and the liquid is left in the sealing cavity until the battery is submerged and covered. The test cabinet can fundamentally and thoroughly prevent the possibility of combustion explosion of the thermal runaway battery in a mode of combining internal blocking and external blocking in the battery formation process.

The application discloses a soil solidification method and belongs to the field of road engineering. The solidification method comprises the following steps: S1, performing particle size analysis on undisturbed soil to determine the weight proportion of gravelly soil, sandy soil, fine-grained soil and clay soil; S2, determining the adding amount of gravelly soil additive, sandy soil additive, fine-grained soil additive and clay soil additive, so that the weight proportion of gravelly soil, sandy soil, fine-grained soil and clay soil in the solidification system reaches (0.1-2.0):(1.0-5.0):(82.0-86.0):(10.0-15.0); and S3, mixing the gravelly soil, sandy soil, fine-grained soil and clay soil in proportion, mixing the mixture with an appropriate amount of liquid material, and uniformly mixing the mixture, and then standing or compression molding to complete soil solidification, wherein the liquid material is a calcium hydroxide solution. Compared with the prior art, the soil solidification method can form a soil solidification system with good later strength and water stability, and can be widely applied to the field of road base and cushion paving.

The present application relates to a kind of high hardness micro-polluted water synchronous purification system and purification method.The present application includes total inlet pipe, for providing high hardness micro-polluted water;Hardness removal synchronous catalytic oxidation unit, in communication with total inlet pipe, hardness removal synchronous catalytic oxidation unit is provided with main inlet, mixed push flow ware, micro-nano bubble secondary cutter, effluent overflow tank;Calcium hydroxide storage pool, for providing calcium hydroxide solution;Gas-liquid synchronous pressurizing pump and ozone generator, ozone generator is in communication with the gas inlet end of gas-liquid synchronous pressurizing pump, the water inlet end of gas-liquid synchronous pressurizing pump is in communication with total inlet pipe, the water outlet end of gas-liquid synchronous pressurizing pump is in communication with micro-nano bubble secondary cutter;Induced crystallization filter unit, is provided with induced crystallization filter material;Alkaline back adjustment unit, is provided with adjust alkali mixed push flow ware and carbon dioxide aeration disc;Carbon dioxide generator, in communication with alkaline back adjustment unit.The present application can remove the problem of hardness and trace organic pollutants simultaneously at low cost and safely.

The utility model relates to the technical field of wastewater treatment, in particular to a reaction device for treating hypophosphorous acid by a potassium permanganate method, which comprises a hypophosphorous acid sewage treatment tank, a calcium hydroxide solution adding device used for adding a calcium hydroxide solution is arranged over the middle portions of the partition supporting plates, an anti-precipitation stirring device is arranged in the calcium hydroxide solution adding device, and the multiple partition supporting plates are arranged in an X-shaped crossed mode. According to the present invention, the multiple key assemblies and structures are designed to optimize the calcium hydroxide solution adding and mixing process, such that the precipitation effect is improved, and the wastewater treatment efficiency is improved.

The utility model discloses a device capable of automatically controlling and measuring the concentration of a calcium hydroxide solution, which comprises a configuration tank, a stirring device, an automatic control device, an automatic control device and an automatic control device, and is characterized in that a stirrer is arranged in the configuration tank, and a top feed port is connected with a bottom discharge port of a calcium oxide hopper; the rotor flow meter is arranged on the desalted water feeding pipeline at the top of the configuration tank; the radar liquid level meter is arranged on the preparation tank; the inlet end of the sampling tank is provided with a mass flow meter, the mass flow meter is connected with a sampling opening in the bottom of the preparation tank through a first alkali liquor pump, and the outlet end of the sampling tank is connected with a liquid return opening in the side wall of the preparation tank through a second alkali liquor pump; the inlet end of the storage tank is connected with a liquid conveying opening in the bottom of the configuration tank through a third alkali liquor pump.

The utility model relates to the technical field of flue gas treatment after a desulfurizing tower, in particular to a system for capturing carbon dioxide in post flue gas, which comprises an absorption tower, the rear flue gas conveying mechanism is arranged between the desulfurization tower and the absorption tower; the alkali liquor conveying mechanism is used for conveying an alkali solution into the absorption tower to form an absorption solution; the absorption liquid spraying mechanism is used for absorbing the absorption liquid, spraying the absorption liquid out of the absorption tower and making contact with the rear flue gas to form rich liquid; the pH detection unit is arranged in the absorption tower; an acid liquor conveying mechanism; a reaction tank; the calcium hydroxide conveying mechanism is used for conveying a calcium hydroxide solution into the reaction tank; the rich solution conveying mechanism is used for conveying the rich solution in the absorption tower to the reaction tank and reacting the rich solution with the calcium hydroxide solution to obtain a reaction tank product; the centrifugal machine is used for separating reaction tank products. According to the invention, acidic wastewater and alkaline wastewater generated after a resin regeneration process can be recycled in a boiler water supply system, and meanwhile, carbon dioxide in post-flue gas can be captured and utilized.

The invention belongs to the technical field of active substance extraction, and particularly relates to a method for extracting alkaloid from leaves. The method for extracting alkaloid from leaves provided by the invention comprises the following steps: (1) mixing a crushed leaf raw material with a calcium hydroxide solution to obtain a mixed material; mixing the mixed material with limonene, soaking, and centrifugally separating to obtain a mixed solution of which the residue content is less than 2wt%; (2) mixing the mixed solution with the slag content of less than 2wt% with acetic acid, and then heating to react; after the reaction, separating from the lower layer of the obtained liquid to obtain a solution containing alkaloid; and filtering, crystallizing and drying the solution containing the alkaloid to obtain the alkaloid. According to the method, limonene is adopted for soaking in the alkali environment, then acetic acid is adopted as an extraction solvent, damage to alkaloid can be reduced, interference of impurities to alkaloid separation is avoided, the extraction rate and purity of alkaloid are effectively improved, and the method has wide application prospects in the field of alkaloid extraction.

The present invention provides a roof pre-splitting device and a pre-splitting method thereof, relating to the technical field of mineral mining, and aiming to solve the technical problems that the direction and range of roof pre-splitting and stable pressure cannot be effectively guaranteed. The roof pre-splitting method includes drilling at least two holes obliquely upward on the periphery of the roof pre-splitting position, each hole facing the roof pre-splitting position, there is a rock layer space between the bottoms of the holes, and the rock layer space has rock layer fissures; injecting calcium hydroxide solution with pressure into one hole and injecting carbon dioxide gas with pressure into one hole; the calcium hydroxide solution and the carbon dioxide gas react in the rock layer fissures to form solid calcium carbonate; under the combined action of the pressure of the calcium hydroxide solution, the pressure of the carbon dioxide gas and the solid-phase pressure of the calcium carbonate, the roof is pre-split directionally; the pressure of the solid calcium carbonate is the pressure in the vertical direction of the roof. The roof pre-splitting method of the present invention is used to control the directional caving of the roof in a mine.

The invention discloses a viscosity modifier based on machine-made sand waste mud and a preparation method thereof. The viscosity modifier is a viscosity modified microsphere which is prepared from waste mud microspheres, a calcium hydroxide solution, a sodium hydroxide solution, a sodium carbonate solution, a sodium phosphate solution, amorphous calcium carbonate and an oil phase, takes calcium carbonate as a framework and contains a large number of pores, and the pores are filled with polyacrylate. The waste slurry microspheres are particles with the particle size of 0.15 mm or less, and the particles are obtained by spraying waste slurry after the waste slurry is atomized by sludge atomization equipment. According to the method, the waste mud obtained after machine-made sand washing is modified, the porous structure microspheres which have the viscosity reduction effect and mainly take calcium carbonate are obtained, reduction of the viscosity of concrete is facilitated, meanwhile, the strength of the concrete is guaranteed, and therefore resource utilization of the waste mud obtained after machine-made sand washing is achieved.

The application relates to the technical field of sewage treatment, in particular to a carbon source for sewage treatment and a preparation method and application thereof. The preparation method of the carbon source for sewage treatment comprises the following steps: (1) crushing and drying wheat straw and reed straw, soaking in a calcium hydroxide solution, filtering, washing with deionized water until neutral, and drying to obtain plant materials; (2) stirring polyvinyl alcohol and modified chitosan in water, then adding the plant materials in step (1) to obtain a mixed solution, adding a glutaraldehyde aqueous solution for crosslinking to obtain solution A; (3) dispersing functional fillers in water to obtain solution B, adding the solution B into the solution A obtained in step (2), uniformly mixing, and freeze-drying to form, and the carbon source is obtained. The carbon source can continuously and stably provide carbon sources, has good denitrification effect and heavy metal ion removal effect in sewage treatment, has good compressive strength, and can meet the actual application requirements.

The invention relates to the technical field of salt manufacturing brine purification, in particular to a calcium type brine coupling synthesis ammonia low-A tail gas purification process which comprises the following steps: pumping raw brine from a mine and mother liquor returned by a salt manufacturing workshop into a primary reaction clarification tank, adding sodium sulfate and a calcium hydroxide solution for reaction, and precipitating Mg < 2 + > and part of Ca < 2 + > in the brine; and pumping the clear liquid into a secondary reaction clarification tank, introducing CO2 tail gas generated by a synthetic ammonia low-temperature methanol washing process to perform carbonization reaction, controlling the reaction endpoint, supplementing sodium carbonate to completely precipitate Ca < 2 + > into calcium carbonate, and clarifying to obtain refined brine. Ammonia synthesis low-temperature methanol washing CO2 tail gas is adopted to replace flue gas of a power plant boiler, and CO2 is provided for salt manufacturing brine purification; and the synthesized low-methane tail gas is relatively high in CO2 content and relatively pure in component, so that the effects of reducing the brine purification cost and recycling CO2 are achieved, and the influence of dust, escaping ammonia, heavy metal ions and the like contained in the flue gas of the power plant boiler on the quality of a salt-making finished product can be avoided.

The utility model discloses a partition reaction device for a calcium hydroxide solution in reversible thermal chemical reaction. The partition reaction device comprises a plurality of partition reaction tubes which are arranged in an array, one end of the partitioned reaction pipe is connected with a calcium hydroxide mixed solution conveying pipe, so that the calcium hydroxide mixed solution is conveyed into the partitioned reaction pipe for continuous exothermic reaction; the other end of the partition reaction pipe is connected with a calcium hydroxide mixed liquid recovery pipe; a cold water pipe and a hot water pipe are further arranged on the partition reaction pipe, cold water is guided into the partition reaction pipe through the cold water pipe for heat exchange, hot water is recycled from the hot water pipe, and continuous heat exchange is formed; compared with an integrated reaction tank, the reaction tank disclosed by the utility model has the advantages that the efficiency of partitioned exothermic reaction is higher, and heat energy can be supplied more quickly; and partial partition reaction pipes can be opened, so that a small amount of hot water is output, and waste is avoided.

A preparation method of oxygen-producing nanoliposomes. In a non-polar organic solvent, soybean lecithin and a pectin solution are added. Sodium percarbonate solution and calcium hydroxide solution react at low temperature to generate peroxide, and the calcium hydroxide solution and the pectin solution can also undergo a cross-linking reaction to coat a calcium pectate gel film outside the peroxide. It is made into oxygen-producing liposomes by vortex ultrasonic mixing in lecithin-non-polar organic solvent, reverse evaporation, and then adding water and vortex ultrasonic mixing. The prepared oxygen-producing nanoliposomes have a high oxygen production amount, can be stored for a long time under freezing conditions, have high performance stability, and the effective oxygen release time at room temperature is as high as 55h to 60h.