35 results about "CALCIUM HYDROXIDE SOLUTION" patented technology

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 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.

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 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 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 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.

The utility model discloses a production system for producing an anti-freezing solution and a dust suppressant by using carbide slag, which comprises a stirring tank, a water adding pipeline arranged on the stirring tank, a metering valve arranged on the water adding pipeline and a calcium chloride solution adding pipeline arranged on the stirring tank, and the calcium chloride solution adding pipeline is connected with a mother liquor precipitation tank through a metering pump and a valve. An inlet of the mother liquor precipitation tank is connected with a calcium carbide slag calcium chloride solution preparation unit, a calcium hydroxide adding pipeline is arranged on the stirring tank and connected with a calcium hydroxide solution storage tank, a metering pump and a valve are arranged on the calcium hydroxide adding pipeline, and other raw material adding pipelines are arranged on the stirring tank. Other raw material adding pipelines are connected with other raw material storage tanks through metering pumps and valves, other raw material storage tanks are also provided with water adding pipelines, and the bottom of the stirring tank is provided with a material outlet pipeline which is connected with an anti-freezing solution or dust suppressant finished product tank. The system is simple in structure, can realize continuous batch production, is environment-friendly and efficient, and achieves the purpose of waste utilization.

This invention relates to the field of inorganic composite materials technology, specifically to a lightweight, flexurally resistant gypsum board reinforced with plant fibers. The plant short fibers used in the gypsum board are impregnated with calcium hydroxide solution and fumigated with sulfur dioxide gas, resulting in an in-situ calcium sulfite / calcium sulfate microcrystalline coating layer on their surface. This enhances the interfacial bonding between the fibers and the gypsum matrix. During preparation, a dry-mixing followed by wet-mixing process ensures component uniformity. A combination of vacuum filtration and hot-pressing is used to achieve rapid dehydration and high-pressure compaction of the slurry. The gypsum board produced by this invention maintains its lightweight nature while exhibiting excellent flexural strength and impact resistance, solving the problem of insufficient mechanical properties in traditional lightweight gypsum boards.

The utility model discloses a sodium sulfate waste salt utilization and treatment system which comprises a dissolving unit, a reaction unit and a recovery unit which are connected in sequence, the dissolving unit comprises a sodium sulfate dissolving device and a calcium hydroxide dissolving device which are respectively used for dissolving waste salt sodium sulfate and calcium hydroxide in a methanol solution; the reaction unit comprises a reaction device connected with the dissolving unit and a separation device used for enabling a sodium sulfate solution to react with a calcium hydroxide solution to generate a sodium hydroxide solution and a calcium sulfate precipitate, and further comprises a separation device connected with the reaction device and used for separating the calcium sulfate precipitate and a filtrate containing sodium hydroxide; the recovery unit comprises a filtrate circulating device, a distillation device and an evaporation device which are connected in sequence, and the evaporation device is used for evaporating and concentrating filtrate to obtain a sodium hydroxide product with target concentration. The sodium sulfate waste salt recycling device realizes effective recycling of sodium sulfate waste salt, has economic value and environmental protection significance, and is suitable for large-scale industrial production.

The utility model relates to the technical field of carbonization reaction equipment, and discloses nano calcium carbonate continuous carbonization reaction equipment which comprises a reaction mechanism, and a temperature control mechanism is arranged at the bottom end of the reaction mechanism. According to the continuous carbonization reaction equipment for the nano calcium carbonate, a calcium hydroxide solution is input through the liquid conveying pipe and atomized through the atomizing spray head, carbon dioxide guided in through the gas conveying pipe is diffused through the gas conveying spray head, gas-liquid two-phase full contact is achieved, calcium carbonate precipitates are generated, the precipitates are intercepted to the containing cabin through the filter screen, and redundant liquid is discharged through the discharging port; for side reaction, a temperature control medium is input through a liquid inlet of the temperature control mechanism, so that the liquid tank is kept in an environment of 35 + / -2 DEG C, and reverse dissolution of calcium carbonate is inhibited; and the CO2 concentration is adjusted to 8-12 vol%, so that the main and side reaction paths can be directionally regulated and controlled, the yield of nano calcium carbonate is ensured to be more than 95%, and the production of calcium bicarbonate can be switched.

The application relates to a method for preparing high-purity calcium fluoride by fluorine-containing wastewater resource treatment, which comprises the following steps: step 1: taking calcium fluoride as a core, coating an active calcium-based compound on the surface to form a core-shell structure composite seed HAP / CaF2; step 2: adding fluorine-containing wastewater into a stirring kettle, adjusting pH=5-8, adding the composite seed HAP / CaF2, starting stirring to uniformly disperse the seed, adopting a mode of adding calcium hydroxide solution in sections to carry out a crystallization reaction, controlling the Ca / F molar ratio and stirring intensity in different stages to maintain the supersaturation of the reaction system in a metastable zone interval, and inducing calcium fluoride to grow on the surface of the composite seed in a directional mode; step 3: after the crystallization reaction is completed, the reaction liquid is subjected to solid-liquid separation to obtain crude calcium fluoride crystals and a filtrate; and step 4: adding the crude calcium fluoride crystals into HF and washing until neutral, and the product is obtained. The method fundamentally solves the uncontrollable problem in the calcium fluoride crystallization process, greatly improves the product purity and fluorine resource recovery rate, and significantly reduces equipment investment and operation cost.

The utility model provides a kind of municipal sludge compost fermentation produced condensate waste liquid processing system, it is related to condensate waste liquid processing field, including mixed sedimentation tank, ozone reaction device, dilution tank, and mixed sedimentation tank is equipped with dosing opening, sewage inlet, condensate waste liquid enters into mixed sedimentation tank from sewage inlet, and reagent is added to mixed sedimentation tank by dosing opening, and the reagent is added is calcium hydroxide solution, and the sewage outlet of mixed sedimentation tank is connected by pipeline and the water inlet of ozone reaction device, and the water outlet of ozone reaction device is connected by pipeline and the water inlet of dilution tank;After reaction and deposition, sludge is entered into the feed end of sludge compost system by sludge outlet;Sewage and tail water addition ratio in dilution tank are 1:10+;Beneficial effect: the liquid after processing of the application is used as supplementary nitrogen fertilizer and garden greening water is mixed and irrigated, and the generated precipitate is used for compost fermentation to enhance sludge fertility, and the application achieves the purpose of source treatment and the treatment process is simple.

The utility model relates to the field of flue gas treatment, and provides a multi-stage segmented treatment system for high-halogen flue gas. Comprising a defluorination tower, a dechlorination tower and a desulfurization tower which are sequentially connected in series, the bottom in the defluorination tower is connected with a calcium hydroxide solution tank and a calcium chloride solution tank through a circulating pump, the bottom of the defluorination tower is connected with a calcium fluoride recovery system through a pipeline, and the bottom of the dechlorination tower is connected with an acid liquor storage tank through a pipeline and a discharge pump. The desulfurization tower is connected with a limestone slurry tank through a slurry pump, a spraying device in the dechlorination tower pumps slurry from the bottom through a circulating pump and sprays the slurry downwards, and the bottom of the dechlorination tower is connected with a gypsum recovery system through a pipeline and a gypsum discharge pump. According to respective characteristics of hydrogen fluoride, hydrogen chloride and sulfur dioxide, targeted absorption is carried out in different sections, so that mutual interference of different acidic gases is avoided, and the absorption efficiency is improved; the purity of the absorbed by-products in each section is also improved, and the recycled by-products can be reutilized.

The utility model discloses a calcium hydroxide flue gas desulfurization device, including desulfurization box and drive seat, the central position of desulfurization box top end is installed with drive seat, the sidewall of drive seat is installed with step motor, the output of step motor is installed with worm, the top of drive seat is installed with adapter sleeve, the central position of desulfurization box inside is provided with the stirring rod, and stirring rod penetrates drive seat and extends to the inside of adapter sleeve and is connected with adapter sleeve swing, the stirring rod surface of worm one side is equipped with worm wheel, and worm wheel and worm are interlocked, the sidewall of stirring rod is provided with air inlet pipe. The utility model not only has realized the convenient circumferential rotation stirring calcium hydroxide solution and made it with flue gas even contact, has facilitated the quick dismounting of filter block and has replaced and the convenience of circumferential rotation scraping and cleaning the precipitate adhered on the inner wall, and has improved the effect of flue gas desulfurization and the convenience of cleaning precipitate.

The application discloses a calcium-based scale deposition experimental device and experimental method. The device comprises a reaction container, a sensor module, a control unit, a solution automatic supply device and a carbon dioxide gas supply unit. The sensor module monitors the pH value and calcium hydroxide concentration of the reaction solution in real time; the control unit receives data and compares with the preset threshold value, and accordingly controls the automatic addition of calcium hydroxide solution by the supply device to maintain the stability of the chemical parameters; the carbon dioxide supply unit supplies the gas at a controllable flow rate. The experimental method comprises the following steps: setting parameters and initializing; starting constant temperature and gas supply; automatically running the system, maintaining the stability of the conditions through real-time monitoring, threshold value comparison and automatic supply; sampling and analyzing the deposits after the experiment, and exporting the process data for analysis. The application solves the problems of parameter drift and frequent manual intervention in the traditional method, and significantly improves the repeatability, automation level and scientificity of the data of the experiment.

The utility model belongs to the technical field of sulfuric acid purification, and particularly relates to an auxiliary sulfuric acid purification mechanism in sulfuric acid production, which comprises a reaction kettle, a sealing component is arranged at the top end of the reaction kettle, an outer pipe is fixedly connected to the middle end of the inner side of the reaction kettle, and an inner pipe is fixedly connected to the inner side of the outer pipe. A sealing through groove is formed between the outer pipe and the inner pipe, evenly-distributed discharging openings are formed in the inner side of the outer pipe, and a control assembly is arranged on the outer side of the outer pipe. According to the sulfuric acid auxiliary purification mechanism in the sulfuric acid production, a calcium hydroxide solution is conveyed into the through groove between the outer pipe and the inner pipe through the control valve at the top end and the joint, and is uniformly conveyed into a reaction kettle through the uniformly distributed discharge holes formed in the inner side of the outer pipe; the calcium hydroxide solution reacts with the sulfuric acid, so that the contact area of the two solutions is increased, and alkaline impurities in the sulfuric acid can be quickly removed.

The utility model provides a carbon dioxide absorption device based on carbon neutralization, and belongs to the technical field of carbon dioxide collection equipment. The carbon dioxide absorption device based on carbon neutralization comprises an absorption and neutralization main body part and a gas dispersion part. The shielding housing is arranged in the absorption tank, a discharge port is formed in the middle of the shielding housing, the bottom of the absorption tank is communicated with a discharge pipe, and a valve is arranged outside the discharge pipe. The vertical pipe rotatably penetrates through the top wall of the absorption tank, the bottom end of the vertical pipe is communicated with the ball, the rotation driving part drives the vertical pipe to rotate, and a connector pipe is arranged at the top of the vertical pipe. The generated calcium hydroxide impurities fall at the bottom of the shielding housing and are shielded by the shielding housing, and the rotating sphere above drives the calcium hydroxide solution on the upper layer to rotate, so that calcium carbonate precipitates dispersed in the calcium hydroxide solution on the upper layer can be reduced, and the calcium hydroxide on the upper layer can be kept to have a good absorption effect for a long time.

The utility model relates to a technical field of chemical industry machinery, especially to a kind of nano calcium carbonate preparation device.Nano calcium carbonate preparation device includes: carbon dioxide conveying component, spray reaction tank and separation component, carbon dioxide conveying component and separation component are connected with spray reaction tank;Carbon dioxide conveying component includes first air compressor and pressure stabilizing tank, the air pipe of first air compressor is connected with pressure stabilizing tank, the air pipe of pressure stabilizing tank is connected with spray reaction tank;The top of spray reaction tank is provided with the spray head for spraying calcium hydroxide solution, and spray reaction tank is provided with pressure reducing valve;Separation component includes the suction filtration mechanism for separating the nano calcium carbonate generated by reaction with calcium hydroxide solution.The nano calcium carbonate preparation device provided by the utility model improves the particle distribution uniformity of the product prepared, the overall land area is small, the energy consumption is smaller, and the preparation cost is low.

The invention relates to the technical field of solid waste resource utilization, and provides a mortar material based on household garbage incineration bottom ash activated by alkali dipping and a preparation method of the mortar material. The method comprises the following steps: impregnating the MSWIBA in a calcium hydroxide solution for a short time to obtain alkali impregnated activated MSWIBA; and the MSWIBA subjected to alkali dipping activation, cement, sand and water are prepared into a mortar material. According to the preparation method, calcium ions can be effectively supplemented through short-term impregnation of the calcium hydroxide solution, out-phase nucleation of ettringite and formation of C-S-H gel can be promoted, meanwhile, an inert layer on the surface of MSWIBA is removed, generation of harmful phases is inhibited, and the gelling activity of the MSWIBA is remarkably improved. The result of the embodiment shows that the 28-day compressive strength of the mortar material provided by the invention reaches 36.63 MPa, the activity index H28 is 76%, the porosity is as low as 16.28%, and the mortar material has excellent mechanical properties and a compact microstructure.

The invention relates to the technical field of tail gas treatment, in particular to a tail gas treatment device for steel tailing treatment, which comprises a bottom plate, a worktable is arranged at the top of the bottom plate, a bracket is arranged at the top of the worktable, a mounting shell is arranged on the left side of the top of the bracket, and a first pipeline is arranged on the mounting shell; and the right side of the first pipeline communicates with a second pipeline. According to the dust removal assembly, a servo motor is adopted to drive a gear and a rack for transmission, dynamic switching of multiple sets of filter plates is achieved, the blocked filter plates can be replaced without shutdown, continuous dust removal operation is guaranteed, and meanwhile the large-particle impurity intercepting effect is improved through a double-layer filter structure; the air injection stirring assembly is matched with the driving assembly to achieve synchronous rotary stirring of the three treatment boxes, tail gas makes full contact with a calcium hydroxide solution, the acid-base neutralization reaction rate is greatly increased, residues of pollutants such as calcium sulfite and lead hydroxide are reduced, and the tail gas purification effect is improved.

The invention relates to the technical field of inorganic composite materials, in particular to a plant fiber composite reinforced light anti-scratching gypsum board. Plant short fibers adopted by the gypsum board are subjected to calcium hydroxide solution dipping and sulfur dioxide gas fumigation treatment, a calcium sulfite / calcium sulfate microcrystalline coating layer is generated on the surfaces of the plant short fibers in situ, the interface bonding force of the fibers and a gypsum matrix is enhanced, and during preparation, the process of dry mixing and wet mixing is adopted to ensure that components are uniform; and rapid dehydration and high-pressure compaction of the slurry are realized through a process of combining vacuum filtration and hot press molding. The gypsum board prepared by the invention has excellent flexing resistance and impact strength while keeping light weight, and solves the problem of insufficient mechanical properties of the traditional light gypsum board.

A method for making a calcium hydroxide solution includes adding water and calcium oxide into a slaking reactor equipped with a stirring means at an upper end and two or more outlets positioned at different heights. The materials are stirred so that a vertical concentration gradient of calcium ions develops within the reactor, producing a clear liquid layer at an upper region and a milk of lime suspension at a lower region. A desired calcium hydroxide solution is obtained by selecting an outlet corresponding to the required concentration of calcium ions.