52 results about "Limewater" patented technology

The invention discloses a coupling carbon capture selective catalytic denitration pyrolysis device which comprises a shell, a pyrolysis cylinder, a carbon capture cylinder and a heating cylinder, the shell is a rectangular shell, the top of the shell is provided with a separation cavity, the bottom of the shell is provided with a gas collection cavity, and the gas collection cavity is communicated with the pyrolysis cylinder. The first end of the pyrolysis cylinder extends into the shell from the top of the shell and communicates with the gas collection cavity, the pyrolysis cylinder is arranged at the center of the shell, and the pyrolysis cylinder is used for pyrolyzing ammonium carbamate powder and conveying pyrolysis gas of carbon dioxide and ammonia gas generated by pyrolysis into the gas collection cavity; the slaked lime water inlet is used for conveying raw and cooked lime water into the carbon capture cylinder so as to adsorb carbon dioxide in pyrolysis gas entering the carbon capture cylinder from the gas collection cavity. Compared with urea ammonia preparation, the ammonia preparation efficiency is improved by 5.4%-24.8% and averagely improved by 15.60%, the ammonia preparation energy consumption is reduced by 30.6%-40.6%, and meanwhile, the denitration efficiency of the generated mixed gas entering the flue gas selective catalytic denitration reactor can be improved by 2.8%-4.2%.

This disclosure provides a two-step process to produce monocalcium phosphates from lime water treatment plant lime softening residuals and from other sources containing calcium salts. This patent focuses on the reuse of lime softening residuals to produce monocalcium phosphates and dicalcium phosphates for use in a variety of applications including as quick release and slow release fertilizers, for animal feed and other applications. The two-step process is conducted close to ambient temperatures and under controlled pH conditions to produce substantially pure calcium phosphate products while at the same time capturing the carbon dioxide generated in the process.

Provided are: a marine environment improvement method capable of reducing greenhouse gas by absorbing carbon dioxide and improving a marine environment; and a calcium ion supply device used for the same. The marine environment improvement method involves: supplying lime water or calcium carbonate and water to a reaction tank 10; supplying atmosphere A into the reaction tank 10; causing a reaction in the reaction tank 10; and supplying, to the sea S, an aqueous solution of obtained calcium hydrogen carbonate. A calcium ion supply device 1 includes the reaction tank 10, a supply device 2, a gas-liquid contact device 3, a conveyance device 4, and a control device 5 for controlling each of the devices.

The application discloses a preparation method of silane composite nano C-S-H for hydrophobic modification of a concrete surface and application thereof, and relates to the field of building engineering materials. In the prior art, silane is prone to self-polymerization in a strong alkali environment, is difficult to be stably compounded with nano C-S-H, and cannot realize the synergistic effect of hydrophobicity and densification during the construction window period of fresh concrete. The application comprises the following steps: preparing a silane hydrolysis solution A, mixing ethanol, water and n-octyl triethoxysilane in a mass ratio of 50:1:(1.5-2.5), first hydrolyzing in an acid to adjust the pH, and then adjusting to near neutrality by an alkali; preparing a surface aminated dispersion solution B, dispersing nano C-S-H in an alkaline medium, adjusting the solid content and the pH by saturated lime water, and adding gamma-aminopropyl triethoxysilane to react; adding the liquid A into the liquid B to condense, and adjusting the solid content and the pH after alcohol removal. The technical scheme realizes the improvement of hydrophobicity, anti-permeability and chlorine ion resistance, and the obtained suspension is used for concrete surface treatment, so that the synergistic improvement of rapid hydrophobicity and surface layer densification can be realized.

The application discloses a treatment process of high-purity quartz sand acid washing wastewater and belongs to the technical field of wastewater treatment. The treatment process comprises the following steps: S1, high-purity quartz sand acid washing wastewater is discharged into raw water pool and is left standing; S2, the wastewater is pumped to a neutralization pool, lime water is added, and the pH of the wastewater in the pool is adjusted to 6.0-7.0; S3, after neutralization, the wastewater is transported to a coagulation and sedimentation pool, calcium chloride and PAC are added, coagulation stirring is carried out, standing and sedimentation are carried out, and after sedimentation, sludge is discharged to a sludge pool; S4, the supernatant of the coagulation and sedimentation is discharged to an ion adsorption pool, stirring is started, an adsorbent calcium aluminum hydrotalcite is added to the pool for adsorption, and the content of fluorine ions is determined, until the content of fluorine ions is lower than 5 mg / L, the stirring and adsorption are stopped, and the water quality reaches the standard and is discharged to a discharge pool. The method can realize stable adsorption under a low fluorine ion concentration, significantly improves the removal rate of fluorine ions, and finally obtains standard wastewater with a fluorine content of not more than 5 mg / L.

The application discloses a method for treating and utilizing large-particle waste sand in ammonia-alkali method alkali waste liquid, and the process is as follows: treating the large-particle waste sand, reducing the content of soluble salt in the waste sand through water washing, controlling the content of soluble salt in the waste sand to be less than or equal to 2%, designing the mixing proportion of the waste sand lime cement soil, replacing the soil in the cement lime soil with different amounts of waste sand, keeping the mass ratio of the admixture lime and cement unchanged in each test, and decreasing the content of the soil corresponding to the waste sand proportion gradient; carrying out the compaction test on the materials in each group under different target moisture contents, obtaining the maximum dry density and the optimum moisture content of the sample; determining the waste sand replacement interval of the waste sand lime cement soil meeting the strength and the optimum proportion of the waste sand lime cement soil material; and preparing the waste sand lime cement soil for paving the roadbed or the base of the road. The application solves the phenomenon of pipe grinding in the process of filling the well with the alkali waste liquid, prepares the road material according to the designed proportion of the large-particle waste sand and the lime soil, reduces the cost of the alkali waste liquid, and changes the large-particle waste sand into the road raw material.

The utility model relates to the technical field of steel cylinder quality detection, in particular to a steel cylinder quality testing device which comprises an efficient detection mechanism, the efficient detection mechanism comprises a workbench, a positioning frame, a clamping arm body, a steel cylinder body, a liquid storage tank and a corrosion-resistant tank, and the top of the workbench is sleeved with the positioning frame in a sliding mode; one end of the clamping arm body is in threaded connection with the outer side of the positioning frame, the vice end of the clamping arm body is tightly attached to the top of the steel cylinder body, the steel cylinder body is clamped in the corrosion-resistant tank, and the liquid storage tanks are symmetrically distributed on the two sides of the corrosion-resistant tank. When the steel cylinder body with carbon dioxide or oxygen is checked, lime water can be fed into the liquid storage tank on the other side and then pumped into the corrosion-resistant tank, if bubbles are generated, it shows that the steel cylinder body with oxygen leaks, and if calcium carbonate precipitates exist at the bottom of the corrosion-resistant tank, it shows that the steel cylinder body with carbon dioxide leaks.

The invention relates to the technical field of building materials, in particular to a method for reducing microcracks of recycled aggregate based on pre-infiltration treatment, which comprises the following steps: pre-infiltrating high-strength concrete recycled aggregate by using a saturated lime aqueous solution, calculating the number N of dry-wet cycles according to the crack width, and carrying out quantitative treatment on the number N of pre-soaking times, the controllability and repeatability of the recycled aggregate treatment process are remarkably improved, microcracks on the surface of the recycled aggregate are sealed after treatment, and then the long-term performance of recycled aggregate concrete is improved.

The invention comprises a method of making lime, dolomitic lime, hydraulic cement such as portland cement clinker and co-products such as pozzolan, acids, alumina, silica and the like. The method comprises providing a natural calcium-iron-aluminosilicate mineral from one or more of hyaloclastite, lava, scoria, volcanic glass, volcanic ash, or any other mineral of a basaltic or intermediate chemical composition and reacting the hyaloclastite with a first hydrochloric acid to create a first salt, precipitating the calcium ions to react with OH− to form calcium hydroxide and heating the calcium hydroxide to create calcium oxide, alite and belite.

The invention discloses a dosage calculation method for regulating and controlling the acidity of required soil by using an alkaline material, which comprises the following steps: step 1, measuring the initial pH value of the soil to be regulated and controlled, and generating a pH-lime water addition amount curve by using a calcium hydroxide titration method; 2, according to the pH-lime water addition amount curve, obtaining the lime demand amount for adjusting the soil; 3, according to the lime demand quantity for adjusting the soil, obtaining the lime equivalent value of an alkaline material and the alkaline material demand quantity for adjusting the soil through an acid extraction-alkali back titration method; and 4, according to the demand quantity of the lime for adjusting the soil and the demand quantity of the alkaline material for adjusting the soil, obtaining the combined dosage of the lime with the target pH value and the alkaline material. The method provided by the invention has the characteristics of reducing soil acidity, realizing dynamic adaptation of total alkalinity and reducing the risk of excessive application of a single material.

The utility model discloses a lime water blending device for water treatment industry, which comprises a mixing frame, a baffle plate and a locking component, longitudinal plates are inserted and connected in the mixing frame in a central symmetry manner, and liquid outlet holes are formed in the top ends of the longitudinal plates in a central symmetry manner. Through the design of the longitudinal plate, the transverse plate, the liquid inlet assembly, the liquid outlet hole, the liquid outlet assembly, the baffle and the locking assembly, the interior of the material mixing frame is divided into four sections through the longitudinal plate and the transverse plate, the middle two sections are sample injection storage areas, a sample injection pipe opening is formed in the bottom, each section is connected with a slaked lime water pipe and a tap water pipe, and mixing areas are arranged on the two sides; the two sides of the upper end of each storage room are each provided with an inverted-triangle-shaped liquid outlet hole, the adjustable water outlet baffle is arranged on the side face, the water volume proportion is controlled by adjusting the water outlet baffles, drop water at the upper end has the mixing function, a storage tank or a stirrer does not need to be additionally arranged, and therefore the lime water blending steps are simplified, operation is easy, and practicability is high.

The utility model relates to the technical field of flue gas denitrification and desulfurization, and discloses flue gas denitrification and desulfurization equipment which comprises a base plate, a desulfurization tower, a denitrification tower and a heat exchange box are sequentially mounted at the top end of the base plate, a gas inlet pipe is mounted on one side of the desulfurization tower, the desulfurization tower is connected with the denitrification tower through a first connecting pipe, and a gas outlet pipe is mounted on the other side of the desulfurization tower. And the denitration tower is connected with the heat exchange box through a second connecting pipe. According to the utility model, the filter plate is designed in the desulfurization tower, and the position of the lime water in the desulfurization tower is slightly higher than that of the filter plate, so that solid substances can be filtered to be layered with the lime water, and the solid substances can be kept wet; and solid substances mixed with lime water above the filter plate are pumped out of the tower through the plurality of sewage suction branch pipes and the sewage suction main pipe, so that the situation that the accumulation of the solid substances possibly causes pipeline blockage or equipment failure is avoided.

The utility model belongs to the field of waste gas treatment, specifically is a kind of environmental protection type desulfurization device, including tower body, the bottom of tower body is installed slurry pool;The side of slurry pool is equipped with delivery pump, the slurry in slurry pool can be extracted by delivery pump;The output end of delivery pump is fixed with delivery pipe, the inside of tower body is equipped with spray tray, the inside of spray tray is equipped with cavity, delivery pipe and spray tray are fixed, delivery pipe and cavity are connected, the bottom of spray tray is equipped with multiple atomizing nozzles, slurry is distributed to the nozzle below in cavity, nozzle is sprayed lime water slurry in the inside of tower body, waste gas needs to flow below spray tray, and from the air pipe to flow to the top of spray tray, rely on above-mentioned structure setting, to this can improve waste gas distribution uniformity and lime slurry spraying uniformity, improve waste gas and lime slurry reaction uniformity, to further improve desulfurization treatment effect.

The utility model relates to the technical field of solid-liquid separation equipment, in particular to a solid-liquid separation device, which comprises two liquid inlet pipes and two groups of stirring tanks, each group of stirring tanks is connected with one liquid inlet pipe, the stirring tanks are arranged in a fixed table, each group of stirring tanks is formed by connecting two tank bodies, a communication port is arranged at the joint of the two tank bodies, and the liquid inlet pipes are communicated with the communication port. A stirring paddle is arranged in each tank body, the upper end of each stirring paddle penetrates through an upper cover of the corresponding tank body and is connected with an output shaft of a driving motor, the driving motors are installed on the surfaces of the upper covers of the tank bodies, and a solid-liquid separation groove is formed in one side of the fixing table. By arranging the solid-liquid separation tank and the stirring tank, calcium oxide and water are mixed, stirred by the stirring tank and then conveyed into the solid-liquid separation tank through the liquid distribution pipe, then clear liquid is discharged through the overflow tank, and sediment is deposited at the bottom of the tank body and discharged through the slag discharge pipe, so that preparation of lime water for neutralizing a pickling solution pipe can be efficiently completed; and the defect that the precipitate enters the pickling solution to be subsequently treated again is avoided.

The invention discloses a method for improving the color of vinegar sparganium stoloniferum, and belongs to the technical field of traditional Chinese medicine processing. The method comprises the following steps: S1, pretreatment: taking fresh rhizoma sparganii, washing, peeling, slicing, putting into 4-7wt% lime water, and boiling for 4-7 minutes; s2, neutralizing and cleaning: cleaning to be neutral and draining; s3, infiltrating with vinegar: infiltrating with table vinegar; s4, performing steaming: performing steaming for 40 to 45 minutes by using saturated steam with the pressure of 0.09 to 0.12 MPa; s5, drying: drying to obtain the vinegar rhizoma sparganii. The processed vinegar rhizoma sparganii is uniform and consistent in color and luster and free of focal spots. Effective components are fully dissolved out (the extract content is greater than 30%); the conversion rate of flavonoid components is improved (the content of quercetin is greater than 0.75 mg / g).

The invention relates to the technical field of industrial wastewater treatment, and discloses a heavy metal and thallium removal process for sintering desulfurization wastewater, which comprises the following steps: regulating the pH value of the wastewater to 8.5-9.0 through lime water pretreatment, and synchronously precipitating sulfate radicals; the method comprises the following steps: adding a 10% sodium sulfide solution (5L / m < 3 >) into a filtrate to remove heavy metal ions and thallium, carrying out flocculation filter pressing by using 1% polyacrylamide (300mL / m < 3 >), then removing excessive sulfur ions by using a 15% polyferric sulfate solution (5L / m < 3 >), finally adjusting the pH value by using lime water, carrying out secondary flocculation filter pressing to remove iron ions, and finally discharging the filtrate after reaching the standard. The process does not need heating and an oxidizing agent, synchronously removes various heavy metals and thallium at normal temperature, is low in medicament cost, does not introduce organic matters, realizes resource utilization of precipitates, and is suitable for efficient and environment-friendly treatment of the desulfurization wastewater in the iron and steel industry.

The utility model discloses a lime water settling device for washing purification, and relates to the technical field of washing purification. The device comprises a mounting plate, a settling assembly is arranged on the upper surface of the mounting plate and comprises a settling box arranged above the mounting plate, a large-hole filter plate and a small-hole filter plate which are arranged from top to bottom are arranged in the settling box, and supports which symmetrically and vertically penetrate through the upper surface of the large-hole filter plate and are fixedly connected are of an inverted-U-shaped structure. A rotating motor is connected to the middle of the upper surface of the mounting plate, and the upper end of a rotating shaft vertically connected to the output end of the rotating motor is connected to the middle of the lower surface of the settling box; and a material pushing assembly is arranged on the side wall of the settling box. According to the lime water settling device, the settling assembly is arranged, the structure is compact, the occupied space is reduced, lime water can be better and faster settled, the material pushing assembly is arranged, the lime particle discharging step is simplified, and the workload during lime particle discharging is reduced.

The application discloses a preparation method of a coal-saving agent for denitration type cement firing and application thereof. The method comprises the following steps: (1) mixing aluminum powder, iron hydroxide powder, iron powder, magnesium powder, silica sol and polymer emulsion, stirring uniformly, drying and grinding to obtain a precursor powder; (2) placing the precursor powder in saturated limewater and reacting under heating conditions, separating out solid matters after completion, drying the solid matters, mixing the dried solid matters with phosphating liquid, standing and drying to obtain a denitration heat-aiding agent; and (3) taking a penetrating agent, a bulking agent, iron citrate and the denitration heat-aiding agent as an A component, and taking hydrogen peroxide as a B component. The A component and the B component are mixed uniformly before use to obtain the coal-saving agent. The coal-saving agent can promote the combustion of coal powder, improve the utilization rate, help to reduce the emission of polluting gases such as sulfur oxides and nitrogen oxides, and relieve the high energy consumption and high pollution problems faced by cement production enterprises.

The present application relates to the field of water treatment, and particularly relates to a water pollution treatment device and a method thereof. The device comprises a ship body and a water pollution treatment box, wherein the water pollution treatment box comprises a water inlet box, a mixing box and a water guide plate. Water enters the water pollution treatment box and then forms lime water. Finally, the lime water is discharged into a lake. The present application improves the efficiency of water pollution treatment. The water pollution treatment box is driven by the ship body to work in the water area to be treated. The water pollution treatment box performs the spreading of the pretreatment agent. The water pollution treatment box utilizes the difference in the flow rate of water entering the water pollution treatment box in the lake to realize the mixing of the pretreatment agent. Finally, the mixture is spread in the water area to be treated by the flow rate of water.

The utility model discloses a hydrochloric acid titration lime activity inspection device, which relates to the technical field of material performance detection and comprises a body with a positioning frame fixedly mounted at the top, a cushion frame is placed on the body, a placing opening for placing a container is formed in the top of the cushion frame, and an elastic guide block is vertically and movably inserted into the bottom of the placing opening. A connecting plate is rotationally mounted on the side surface of the guide block; according to the scheme, a container containing a lime water solution is placed in a placing opening, the container extrudes a guide block to move downwards until the top of the guide block is flush with the bottom wall of the placing opening, the bottom end of a connecting plate abuts against the inner side of a positioning frame, and the container automatically moves to the center of the top of the body, so that the container can be located at the optimal titration position; the reaction with a lime water solution is sufficient and stable, high-precision detection data can be obtained, the cushion frame can be quickly placed without careful alignment, and the placement convenience is improved.

The invention provides a comprehensive utilization method for separating and purifying lithium carbonate and potassium from low-grade lepidolite. The comprehensive utilization method comprises the following steps: crushing a lepidolite roasting clinker, and leaching at normal temperature; defluorination and suction filtration are carried out on the leachate; adjusting the pH of the filtrate with lime water to remove magnesium; removing calcium by using potassium carbonate; extracting and separating to obtain a lithium-loaded organic phase; performing carbon dioxide reverse extraction on the lithium-loaded organic phase, removing calcium and magnesium from a reverse extraction water phase through resin, and performing pyrolysis to prepare lithium carbonate; and when potassium ions in the raffinate reach a certain concentration, carrying out evaporative crystallization to produce a potassium salt byproduct with high economic value. According to the method, the mica roasting clinker is leached with a large amount of water, the leaching rate of lithium is guaranteed, calcium oxide or potassium hydroxide is adopted for impurity removal, the pH of the solution is increased, and the extraction driving force is met; by adopting carbon dioxide reverse extraction, the quality of lithium carbonate is improved; the clinker is repeatedly leached after the raffinate is deoiled, the concentration of potassium in the solution is improved, the evaporation cost is reduced, and the method for producing lithium carbonate is high in recovery rate, low in energy consumption and low in production cost.

This invention relates to the field of engineering waste soil solidification and improvement, and particularly to a method for in-situ modification and solidification of lignin composite solidifying agent. The method includes: uniformly mixing the engineering waste soil to be solidified with cement; calculating the required amount of water to be added according to the optimum moisture content of the engineering waste soil; dissolving water glass and lime in water to generate amorphous calcium silicate, then dissolving sodium lignin sulfonate in the solution; finally, mixing the suspension containing lime, water glass, and sodium lignin sulfonate with the engineering waste soil uniformly; compacting the mixture to its maximum dry density; and curing for at least 7 days. The solidification of engineering construction waste soil using the technical solution of this application has the advantages of low cost, simple operation, high material efficiency, and no secondary pollution.

The utility model relates to the technical field of fluorine-containing waste water treatment, in particular to a fluorine-containing waste brine treatment system which comprises a neutralizing tank, a first feeding pipeline, a second feeding pipeline and a discharging pipeline are arranged in the neutralizing tank, the first feeding pipeline is connected with a fluorine-containing waste brine tank, the second feeding pipeline is connected with a lime water tank, and the discharging pipeline is connected with a lime water tank. The discharging pipeline is connected with the hydrocyclone, a bottom outlet of the hydrocyclone is connected with the drying device through the feeding device, an upper outlet of the hydrocyclone is connected with the buffer pool through the clear liquid pipeline, the buffer pool is sequentially connected with the triple-effect evaporation device and the centrifugal separation device, and a liquid outlet of the centrifugal separation device is connected with the buffer pool through the concentrated salt liquid backflow pipeline. According to the device, calcium fluoride solid and liquid generated after calcium ions are added into fluorine-containing waste brine can be quickly separated without large-volume filtering equipment, the separation effect is obvious, and the occupied area is small; the heat energy in the concentration and crystallization process of clear liquid after solid-liquid separation can be fully utilized, and the energy consumption is reduced.

The application relates to the field of metal recovery, and particularly discloses a method for comprehensively recovering indium, gallium and phosphorus from oily cutting mixed waste, which comprises the following steps: oxidizing and calcining the oily cutting mixed waste to obtain mixed oxides; grinding and pulping the mixed oxides with dilute sulfuric acid to obtain a pulping mixed solution; performing mineral slurry diaphragm electrolysis leaching on the pulping mixed solution, obtaining a sulfuric acid electrolysis leaching solution containing In2(SO4)3, Ga2(SO4)3 and H3PO4 in a cathode area, obtaining an electrodeposited indium on the cathode, and obtaining anode mud deposits containing silicon dioxide and di-aluminum trioxide in an anode area and on an anode; extracting indium from the sulfuric acid electrolysis leaching solution, neutralizing and then hydrolyzing and precipitating gallium in the indium extraction residual liquid, and then continuously neutralizing and precipitating calcium phosphate or superphosphate by using lime water or calcium oxide; and the application has the characteristics of efficiently, low-cost and pollution-free comprehensive recovery of indium, gallium and phosphorus from waste containing silicon dioxide, di-aluminum trioxide, oil and grease, indium phosphide and gallium phosphide.

The application discloses a method for removing chlorine from a zinc sulfate solution containing chlorine by using ozone or ozone air, and ozone or ozone air generated by an ozone generator is introduced into a closed pressure-adjustable container containing the zinc sulfate solution containing chlorine, and oxidation dechlorination is carried out in the container at normal temperature or under the natural temperature condition of the solution; low-chlorine zinc sulfate solution and mixed waste gas containing oxygen and chlorine gas are obtained; the mixed waste gas is introduced into saturated limewater or a sodium alkali solution, and chemical products of sodium hypochlorite or calcium hypochlorite are obtained. The application adopts ozone or ozone air to remove chlorine from the zinc sulfate solution containing chlorine, and has the advantages of simple process, high dechlorination efficiency, comprehensive recovery of chemical products of calcium hypochlorite or sodium hypochlorite for reuse or sale, less waste, no sodium chloride accumulation, and good social and economic benefits.

The application relates to the technical field of concrete structure repairing, and particularly discloses a high-anti-freezing and high-permeability concrete crack repairing material and a preparation process thereof.The repairing material comprises the following components in the following proportions: 10-50 parts of acrylic acid by weight, 12-50 parts of methyl methacrylate by weight, 0.2-3.0 parts of a crosslinking agent by weight, 0.05-2 parts of an oxidizing agent by weight, 0.01-1 part of a reducing agent by weight and 2-10 parts of a watermelon leaf powder-saturated lime water suspension by weight.The repairing material has good permeability and can penetrate into micro cracks, and has good anti-freezing performance, so that the repairing material can be well applied to repairing of concrete structure cracks in a low-temperature environment.

The invention discloses an industrial waste gas desulfurization and denitrification device, which belongs to the technical field of industrial waste gas treatment, and comprises a spray tower, the other side of the spray tower is provided with a spray mechanism for enabling lime water to form atomized mist to be in full contact reaction with waste gas, one side of the spray mechanism is provided with a pressurizing mechanism for pressurizing through gas, and dredging mechanisms for automatically and efficiently cleaning blockages are arranged in the spray mechanism and the pressurizing mechanism. By arranging the pressurizing mechanism and the dredging mechanism, the slurry nozzle is automatically and efficiently dredged, frequent manual intervention is not needed, the problem of unsmooth water outlet caused by blockage of the nozzle is effectively prevented, stable supply and atomization effects of lime water are ensured, full contact reaction of waste gas and the lime water is ensured, the desulfurization and denitrification efficiency is improved, and the production cost is reduced. And meanwhile, the influence of human factors on the treatment effect is reduced through automatic operation of the equipment, so that the emission index is more stable and reliable.

The utility model discloses a spraying system of a wet desulphurization absorption tower of an ultra-large unit, and relates to the technical field of wet desulphurization. The top surface of the base is fixedly provided with an absorption tower, the side edge of the absorption tower is fixedly communicated with an air inlet pipe, the side edge of the absorption tower is provided with a liquid collecting box filled with lime water, the side edge of the liquid collecting box is provided with a spraying mechanism, and the spraying mechanism comprises a slurry circulating pump fixed on the side edge of the base. By arranging the spraying mechanism, lime water is in full contact with flue gas entering the absorption tower in a mist spraying manner, so that the gas-liquid contact area is increased, the reaction of sulfur dioxide and the lime water is facilitated, and the desulfurization efficiency is improved, and the bottoms of the main pipe and the branch pipe are connected with the first nozzle and the second nozzle in a threaded communication manner; when the first nozzle and the second nozzle are abraded and need to be replaced, the threaded connection mode enables dismounting and mounting to be more convenient and faster, and maintenance time and labor cost are saved.

The invention relates to the field of metal recovery, and particularly discloses a method for comprehensively recovering indium, gallium and phosphorus from oily cutting mixed waste, which comprises the following steps: oxidizing and calcining the oily cutting mixed waste to obtain a mixed oxide; grinding and pulping the mixed oxide by adopting dilute sulphuric acid to obtain a pulpified mixed solution; the pulpified mixed solution is subjected to an ore pulp diaphragm electrolytic leaching method, a sulfuric acid electrolytic leaching solution containing In2 (SO4) 3, Ga2 (SO4) 3 and H3PO4 is obtained in a cathode area, electrodeposited metal indium is obtained on a cathode, and anode mud sediment containing silicon dioxide and aluminum oxide is obtained on an anode area and an anode; extracting indium from the sulfuric acid electrolytic leaching solution, neutralizing the indium extraction raffinate, hydrolyzing and precipitating gallium, and continuously neutralizing and precipitating by using lime water or calcium oxide to obtain calcium phosphate or calcium superphosphate; the method has the advantages of being efficient, low in cost and free of pollution and comprehensively recovering indium, gallium and phosphorus from the waste containing silicon dioxide, aluminum oxide, grease, indium phosphide and gallium phosphide.

The tail gas treatment device comprises a treatment box, two butt-joint holes are formed in the outer wall of the treatment box, butt-joint pipes are fixedly connected to the inner walls of the two butt-joint holes, discs of hollow structures are fixedly communicated with one ends of the two butt-joint pipes, and a plurality of atomizing nozzles are uniformly and fixedly communicated with the outer walls of the two discs. The interior of the treatment box is fixedly connected with annular stainless steel plates, the interiors of the two annular stainless steel plates are fixedly connected with stainless steel filter screens, the interior of the treatment box is provided with a tail gas inlet mechanism, and the interior of the treatment box is provided with a switching mechanism. Through the arrangement of the water drainage pipe, the electronic valve, the butt joint pipe, the disc, the straight rod, the atomization spray head, the annular stainless steel plate, the stainless steel filter screen and the tail gas inlet pipe, sulfur dioxide in tail gas is treated by lime water, the tail gas is filtered by the stainless steel filter screen, and impact force of sprayed lime water and clean water is reduced. And the top and the bottom of the stainless steel filter screen can be cleaned.