446results about How to "Reduce escape" patented technology

The invention relates to high-temperature-resistant flame-retardant smoke-suppressing silicone rubber and a preparation method thereof. The silicone rubber comprises the following components in parts by weight: 50-70 parts of methyl vinyl silicone rubber; 5-10 parts of an organosilicon compound; 10-20 parts of an inorganic metal oxide; 20 to 30 parts of modified carbon black; 20 to 30 parts of a compound flame retardant; 4-6 parts of a vulcanizing agent; the modified carbon black is silanized carbon black; the compound flame retardant is formed by inserting zinc borate into graphite layers. Compared with the prior art, the obtained silicone rubber has good high-temperature stability and excellent aging resistance, through synergistic compounding of the modified carbon black, the compound flame retardant and the metal oxide, the effects of smoke suppression, flame retardance and high temperature resistance are achieved, the mechanical property of the silicone rubber is remarkably improved, and the service life of the silicone rubber is prolonged. The application range of the silicone rubber product is wider, and the economic value is good.

The invention relates to an absorption device with opposite spray liquid inlets and a nitrile manufacturing method. According to the absorption device, the ammonia absorption rate can be maximized, and ammonia penetration is reduced. The absorption device comprises a shell and a plurality of spraying devices which are arranged in a layered mode in the direction of the central axis of the absorption device at preset vertical intervals. Each spraying device independently comprises a spraying liquid inlet, a first spraying pipe in fluid communication with the spraying liquid inlet, and a plurality of second spraying pipes which are in fluid communication with the first spraying pipe and extend towards the two sides of the first spraying pipe in the direction perpendicular to the first spraying pipe. The absorption device comprises a second spraying pipe, a plurality of third spraying pipes which are in fluid communication with the second spraying pipe and extend towards the two sides of the second spraying pipe in the direction perpendicular to the second spraying pipe, and nozzles which are located at the tail ends of the third spraying pipes and are in fluid communication with the third spraying pipes. The projection of one of the plurality of spraying devices and the projection of at least one of the first spraying pipe, the second spraying pipe and the third spraying pipe of the other of the plurality of spraying devices on the cross section basically coincide; and the included angle between the projection of the spraying liquid inlet of one spraying device and the projection of the spraying liquid inlet of the other spraying device on the cross section is 180 degrees.

The invention discloses an integrated dedusting-cooling system and method for a high-temperature mining working face of a mine. The integrated dedusting-cooling system comprises a sensor monitoring device, a fuzzy PID control device and a dedusting-cooling device, after the compressed air injection unit of the dust removal and cooling device sucks high-temperature dust-containing airflow in the environment into the system, primary dust removal is performed in the humidification and growth unit firstly, then cold fog cooling and secondary dust removal are performed in the cold fog dust removal unit, and finally airflow purification and tertiary dust removal are performed in the dust filtration and fog dissipation unit. In addition, the sensor monitoring device is adopted to collect environmental monitoring data in real time and feed back the environmental monitoring data to the fuzzy PID control device for processing, when any monitoring data deviates from the environmental parameters set by the system, the working condition of the dust removal and cooling device can be adaptively regulated and controlled, and then continuous dust removal and cooling are conducted on the high-temperature mining working face under different environmental parameters. And efficient cooperative treatment of dust and heat damage on the high-temperature mining working face of the mine is realized. The device has the advantages of being small in dust escape amount, high in dust removal-cooling efficiency and low in energy consumption.

The invention discloses a refined ammonia injection control system for a coal-fired power plant, and relates to the technical field of ammonia injection control systems for power plants. The real-time monitoring module is used for monitoring NOx concentration, oxygen content and temperature parameters in flue gas in real time and transmitting data to the central processing unit; and the prediction model construction module is used for constructing an NOx generation prediction model by utilizing a machine learning algorithm according to the historical data and the real-time monitoring data. Through the real-time monitoring module, the system can continuously track key parameters such as NOx concentration, oxygen content and temperature in flue gas; the control decision is ensured to be based on the latest environmental condition, so that the response speed and accuracy of the ammonia spraying system are improved; the NOx generation prediction model constructed by using a machine learning algorithm not only considers historical data, but also integrates real-time monitoring data, so that the model can accurately predict the NOx concentration change trend in a period of time in the future; and the system can predict and adapt to the future emission condition.

The invention provides an ammonia escape comprehensive control method for high-concentration NOx flue gas denitration, and relates to the technical field of flue gas treatment.The method comprises the following steps that a multi-stage denitration section system arranged in a flue is built, and each stage of system comprises an ammonia spraying system, a catalyst layer and a heat exchanger behind the ammonia spraying system; temperature measuring points are arranged in front of and behind each stage of catalyst layer and behind the heat exchanger, and the flue gas temperature is monitored in real time; nitrogen oxide concentration monitoring devices are arranged at an inlet and an outlet of each stage of denitration section system; the ammonia spraying system sprays ammonia, the ammonia spraying system is matched with the catalyst layers for staged treatment, the flue gas temperature before and after each stage of catalyst layer and behind a heat exchanger and the NOx concentration in the flue gas at an inlet and an outlet of each stage of denitration section system are collected, an algorithm control system is matched, and the ammonia spraying amount is calculated in combination with flow before each stage of treatment; therefore, the ammonia spraying amount of each stage is accurately controlled in real time, the situation of excessive ammonia spraying is completely eradicated, ammonia gas utilization is maximized, each stage is managed in a partitioned mode, and ammonia is accurately controlled.

The present invention relates to a method and an apparatus for producing nitrile with controlled spray liquid input pressure. According to the manufacturing method, spraying liquid can be atomized, the contact area with ammonia is increased, and the mass transfer efficiency is improved. The present invention relates to a method for producing nitrile, comprising a step (referred to as a reaction step) for producing a nitrile-containing reaction product by subjecting a hydrocarbon raw material to an ammoxidation reaction, and a step (referred to as a cooling step) for cooling the reaction product by spraying a spray liquid onto the reaction product by means of a spraying device, the spraying device comprises a spraying liquid inlet, a first spraying pipe in fluid communication with the spraying liquid inlet, and a plurality of second spraying pipes which are in fluid communication with the first spraying pipe, are perpendicular to the first spraying pipe and extend towards the two sides of the first spraying pipe. The first spraying pipe is communicated with the first spraying pipe through fluid, the second spraying pipe is communicated with the second spraying pipe through fluid, the third spraying pipes are communicated with the second spraying pipe through fluid and extend towards the two sides of the second spraying pipe perpendicular to the second spraying pipe, the nozzles are located at the tail ends of the third spraying pipes and communicated with the third spraying pipes through fluid, and in the cooling step, the spraying liquid input pressure of a spraying liquid inlet is controlled to be 0.06-1.00 MPaG.

The invention discloses a primary and secondary fusion complete environment-friendly gas insulated looped network box, which comprises a box body, a load switch is arranged in the switch chamber; the gas tank is filled with environment-friendly gas; a cable chamber; a gas storage space is formed between the support and the gas tank; a leak-proof rod; a one-way valve; a closing frame; a drive spring; a mounting hole; a rebound spring; the swing rod is arranged on one side of the load switch and is used for switching off or switching on the load switch; the connecting rod is connected with the swing rod and the driving rod and used for transmission; one end of the driving rod is connected with the connecting rod; the gear is connected to the driving rod; the gear tooth rod is meshed with the gear, penetrates through the air box and is fixedly connected with the sealing plate; when air leakage occurs at multiple positions, the closing plate closes the air box, drives the grounding switch to be grounded and cuts off the load switch. The invention has the following beneficial effects: the primary and secondary fusion complete environment-friendly gas insulated looped network box can automatically detect the gas leakage position and seal the gas leakage position so as to restrain the leakage of environment-friendly gas.

The invention belongs to the technical field of dust separation, and particularly relates to a pulse dust removal device for a feed production line, the pulse dust removal device comprises a dust removal box body and a control cabinet arranged on one side of the dust removal box body, the bottom of the dust removal box body is fixedly communicated with a dust collection hopper assembly, and a dust inlet pipe is inserted into the upper end of the side wall of the dust collection hopper assembly; a plurality of dust filter bag assemblies are arranged in the dust removal box body, and a clean air exhaust pipe is inserted into the upper end of the side wall of the dust removal box body. The device can perform accurate pulse dust removal on the blocked dust filter bag, reduces unnecessary loss, is good in blockage removal timeliness, can delay the blockage process of the filter bag, facilitates feed dust filtration and separation, can guide air flow to be vertically downward during pulse dust removal, prevents secondary blockage of dust as much as possible, and improves the dust removal efficiency. And dust escape can be reduced when the filter bag fails to filter.

The invention discloses a preparation method and application of a porous carbon-loaded iron-based catalyst, and a nitrogen-doped porous carbon-loaded iron catalytic material is prepared by using the anchoring effect of nitrogen-containing carbon-based ligand 8-hydroxyquinoline and the spatial isolation effect of cyclodextrin containing a unique hydrophobic cavity through hydrothermal and calcination treatment. And high load (9.21 wt%-18.01 wt%) and high dispersion of the iron nanoparticles are realized. The method has the advantages that the problems that in a traditional iron-based catalyst, iron nanoparticles are prone to agglomeration, and the iron loading capacity is not high are solved, and the material has a good catalytic removal effect on toxic organic pollutants in wastewater and meanwhile has excellent selective removal performance on phenolic pollutants. The method disclosed by the invention is simple and easy to implement, low in raw material cost, good in controllability and reproducibility and easy to practically develop.

The invention discloses an SCR (Selective Catalytic Reduction) denitration system which comprises an SCR denitration tower, and a flue guide plate, a flue gas pre-mixer, a main ammonia spraying grid, an ammonia-smoke turbulator, a main catalyst layer, a supplementary ammonia spraying grid and a supplementary catalyst layer are sequentially arranged in the SCR denitration tower in the flue gas circulation direction; the main ammonia spraying grid comprises a plurality of first ammonia spraying branch pipes which are arranged in parallel at equal intervals in the direction perpendicular to the flue gas circulation direction, a row of first nozzles and a row of second nozzles are obliquely arranged on each first ammonia spraying branch pipe in the length direction, the number of the nozzles in each row is multiple, and the first nozzles and the second nozzles are arranged in a staggered mode and face different directions; each ammonia spraying branch pipe is communicated with the ammonia supply pipe, and an ammonia gas control valve is arranged on each first ammonia spraying branch pipe. Through cooperative use of the main ammonia injection grid and the supplementary ammonia injection grid, ammonia escape is reduced, uniform injection of ammonia gas in the whole reaction space is realized, and it is ensured that ammonia escape is maintained at a reasonable level.

The invention relates to an isotope receiving device for inert gas ion collection and a collection method. The isotope receiving device comprises a vacuum box and a receiving pocket which is arranged in the vacuum box and is used for receiving an inert gas ion beam; an entrance slit for an inert gas ion beam to pass through is formed in a front panel, directly facing the incident ion beam, of the receiving pocket, and a graphene window for the inert gas ion beam to penetrate through covers the entrance slit; a rear panel of the receiving pocket is connected with a vacuum displacement platform, a gas path pipeline communicated with an inner cavity of the receiving pocket is arranged in the vacuum displacement platform, and neutralized inert gas is output from the isotope receiving device along the gas path pipeline; and the receiving pocket is also connected with a driving assembly capable of moving back and forth along the incident direction of the ion beam. Compared with the prior art, the isotope receiving device provided by the invention can reduce gas escape after inert gas ions are neutralized, and can realize effective collection of the neutralized isotope inert gas.

The invention discloses a preparation method and application of a magnesium-aluminum hydroxide composite flame retardant, and relates to the technical field of flame retardancy. The preparation method comprises the following steps: mixing magnesium hydroxide and aluminum hydroxide in proportion, adding the mixture into a modified liquid for pretreatment; dispersing the mixture into DMF, dropping protocatechuic aldehyde into the mixture under stirring, introducing nitrogen, and reacting to obtain Schiff-alkalized magnesium hydroxide / aluminum hydroxide; dispersing the mixture into DMF, adding DOPO under stirring, and reacting to obtain a magnesium hydroxide / aluminum hydroxide composite flame retardant; the composite flame retardant contains three flame retardant elements, namely, N, P, and Si, and generates non-combustible gases such as N2 and NH3 to dilute the gas phase during combustion, and also generates groups such as P-O-P, Si-O-Si, and Si-C, so as to form a high-strength and dense silicon layer and carbon layer on the surface of a polymer, effectively reducing the heat conduction speed, isolating oxygen, and slowing down the escape of combustible gas, thereby reducing the decomposition rate of the resin and slowing down the combustion rate.

The invention relates to the technical field of industrial waste recycling and carbon dioxide mineralization, and discloses a leaching method for calcium ions in calcium-containing solid waste. The method for leaching the calcium ions in the calcium-containing solid waste comprises the following steps that S1, the calcium-containing solid waste is subjected to pre-screening and ball milling, and solid waste micro powder is collected; s2, mixing the solid waste micro powder with a leaching agent, and reacting to obtain a calcium ion leaching solution; s3, introducing CO2 gas into the calcium ion leachate, reacting, and separating to obtain a calcium carbonate solid and a regenerated leaching agent; in the step S2, the leaching agent comprises protonated organic amine. According to the method for leaching the calcium ions in the calcium-containing solid waste, the leaching agent selectivity is good, the calcium ion leaching rate is high, the reaction condition is mild, ammonia escape in the leaching process is little, and environment friendliness is achieved; by introducing CO2 gas into the calcium-containing leachate, the leaching agent can be quickly regenerated, and the cyclic stability of the regenerated leaching agent is good.

The invention belongs to the technical field of high polymer materials. The invention relates to the field of plastics, in particular to polypropylene modified plastic and a preparation method thereof. The product provided by the invention comprises the following raw materials in parts by weight: 100-110 parts of polypropylene resin, 20-22 parts of an organophosphorus flame retardant, 10-12 parts of hollow spherical calcium carbonate particles, 0.8-1.2 parts of an antioxidant and 0.2-0.3 part of a plasticizer. Wherein the sphericity degree of the hollow spherical calcium carbonate is 8.5 to 9.0; in addition, the D50 of the hollow spherical calcium carbonate is 45-60 [mu] m. When the hollow spherical calcium titanate is prepared, sodium carbonate, calcium chloride and an emulsifier solution are rapidly stirred to react, centrifugal separation is performed, and then washing, drying, calcining, cooling and screening are performed to obtain the hollow spherical calcium titanate. On the basis of reducing the migration of the flame retardant, the product provided by the invention can reduce the adverse effect of the filler on the flame-retardant effect.

The invention provides a mask system for suppressing aerosol escape based on negative particles and a using method thereof. The mask system comprises a mask and a negative particle generating device. The mask comprises a mouth mask body, the mouth mask body comprises a mouth negative electricity particle interface, and the mouth negative electricity particle interface is connected to the negative electricity particle generating device. The negative particle generating device comprises a circuit board and a negative particle releasing plate, the negative particle releasing plate forms a plurality of discharging bodies, and the circuit board is connected with the negative particle releasing plate so that the discharging bodies can generate negative particles. And negative electricity particles generated by the negative electricity particle generating device can be introduced into the mouth mask body through the mouth negative electricity particle interface so as to promote aerosol to settle in the mask.

The invention relates to the technical field of ceramic production, in particular to an automatic powder burying device for special ceramic production, which comprises a stamping table, an automatic feeding device and a powder burying table, the powder burying table is arranged on the stamping table, the automatic powder burying device further comprises a plurality of vertical knocking blocks, and the vertical knocking blocks are positioned on the powder burying table; the horizontal knocking blocks are located on the powder burying table, the multiple horizontal knocking blocks are divided into two groups and located on the two sides of the powder burying table respectively, and when the automatic powder burying device for special ceramic production is used, different from the prior art, gaps between powder particles are effectively compressed through knocking, and therefore the powder particles are prevented from being damaged; compared with the prior art, the powder burying table has the advantages that the compactness of the powder is improved, the higher compactness is favorable for reducing pores and defects in the product and improving the mechanical strength of the product, and meanwhile, the knocking effect can promote powder particles to be redistributed in the powder burying table, so that the local gap or accumulation phenomenon is avoided, and the uniform powder distribution is favorable for obtaining more consistent product quality.

The present invention belongs to the technical field of nickel-based alloy connection, and specifically relates to a brazing method for improving the high-temperature welding performance of nickel-based alloy joints and a prepared multi-layer welded joint. First, the brazing material is processed into an amorphous brazing foil, and then the amorphous brazing foil is pre-placed between the joint surfaces of the workpieces to be welded of the Inconel625 nickel-based alloy, and then the workpieces to be welded are fixed and placed in a vacuum brazing furnace for brazing. After the brazing is completed, the workpiece group is cooled to below 100°C and then solution treated in a vacuum brazing furnace. The amorphous foil-shaped brazing material used in the present invention has a small difference in melting point from the parent material, which is conducive to capillary action and can optimize the formation and performance of the brazed joint; the solution treatment can improve the distribution and morphology of brittle phases such as borides in the brazing seam. The present invention can be used as a special brazing method for multi-layer brazing joints or Inconel 625 nickel-based alloys, and has great application prospects.

The invention relates to the technical field of solar cells, particularly provides a slice cell and a preparation method thereof, and aims to solve the problem that hydrogen is easy to escape in a process of forming a passive film on a slice section of an existing slice cell. In order to achieve the purpose, the preparation method of the slice battery comprises the steps that the slice battery obtained after slicing is provided, the slice battery comprises end faces adjacent to the front face and the back face, and at least one end face is a slice section; and forming a passive film on the section of the slice of the slice battery by adopting a vacuum coating mode of physical vapor deposition, wherein the deposition temperature of the passive film is 30-220 DEG C. The deposition temperature of the passive film can be controlled by adopting a vacuum coating mode of physical vapor deposition, so that the deposition temperature of the passive film is relatively low, and escape of hydrogen atoms doped in each film layer in the slice battery can be effectively reduced, so that the passivation effect of each film layer is maintained, and the open-circuit voltage of the slice battery is improved.

The invention discloses a preparation system of a thiosulfate solution. The preparation system comprises a reaction kettle, a stirrer arranged in the reaction kettle, a heat exchange water jacket arranged on the outer wall of the reaction kettle in a surrounding manner, a quantitative feeding hopper for feeding a liquid reactant into the reaction kettle, and a gas conveying pipe for feeding a gas reactant into the reaction kettle, a liquid distribution mechanism is arranged in the reaction kettle, and a liquid extraction pipe for communicating the liquid distribution mechanism with a solution in the reaction kettle is arranged outside the reaction kettle; and a gas distribution mechanism communicated with the gas delivery pipe is arranged in the reaction kettle. According to the invention, the spraying direction of the sulfur dioxide gas is always in the water spraying center of the atomizing nozzle, so that the escape of sulfur dioxide is reduced, and the sulfur dioxide gas is fully contacted and reacted with reactants; the gas reactants and the liquid reactants can fully react, the reaction efficiency is high, meanwhile, the tail gas absorption treatment device absorbs tail gas, and the environmental pollution problem is relieved.

The invention relates to an efficient reboiler and a rectifying tower, and belongs to the technical field of reboilers. Comprising a shell and a U-shaped heat exchange tube arranged in the shell, a shell pass inlet and a shell pass outlet are formed in the shell, a liquid inlet cavity and a liquid outlet cavity are formed in one end of the shell, and the two ends of the U-shaped heat exchange tube are communicated with the liquid inlet cavity and the liquid outlet cavity respectively. The shell is provided with a tube pass inlet and a tube pass outlet corresponding to the liquid inlet cavity and the liquid outlet cavity respectively, the U-shaped heat exchange tubes are sleeved with cleaning plates, the cleaning plates are provided with through holes corresponding to the U-shaped heat exchange tubes in a one-to-one mode, and cleaning pieces are arranged in the through holes. The shell is provided with a driving piece used for driving the cleaning plate to reciprocate in the length direction of the shell. According to the invention, the problem that the internal structure of the reboiler is difficult to clean in the prior art is solved.

The invention discloses a method for preparing coke nuts by recovering coke powder and production equipment thereof, and relates to the technical field of energy preparation, the production equipment comprises a stirring mechanism, the stirring mechanism is provided with an extrusion port, the extrusion port is provided with a conveying track group, one end, far away from the stirring mechanism, of the conveying track group is provided with an ash falling box, and a dispersion screen is arranged in the ash falling box; the dry distillation tower is arranged at the output end of the ash falling box, the steam washing assembly is arranged on the dry distillation tower, the discharge port is formed in the dry distillation tower, the mixing box is arranged on the discharge port, the dosing pipe is arranged on the mixing box, the forming machine is arranged on the output port of the mixing box, the recovery plate is arranged at the bottom end of the forming machine, and the pressurizer is arranged on the recovery plate. The pressurizer is provided with a return pipe, the return pipe is communicated with the mixing box, the mixing box is provided with a combination feedback box, the combination feedback box is electrically connected with the dosing pipe and the mixing box through wires, and the device has the functions of layered dry distillation and forming feedback and automatic mixing proportion adjustment.

The utility model relates to a calcium carbonate ore crusher which comprises a bottom plate, a shell is mounted on the upper surface of the bottom plate, a pair of crushing rollers are rotationally mounted in the shell through a driving mechanism, mounting grooves are uniformly formed in the outer surfaces of the crushing rollers, mounting plates are arranged in the mounting grooves, and crushing teeth are uniformly mounted on the outer surfaces of the mounting plates; and a limiting groove is formed in the lower surface of the mounting plate in the length direction of the mounting plate, a limiting rod is arranged in the mounting groove and matched with the limiting groove, and a fixing mechanism capable of fixing the mounting plate is arranged on the side surface of the crushing roller. Through the arrangement of the fixing mechanism, when the crushing teeth are abraded or damaged, only the mounting plate provided with the crushing teeth needs to be replaced, the whole crushing roller does not need to be replaced, and therefore the maintenance cost and the working downtime are reduced, and the crushing roller can be conveniently replaced according to different types of crushed objects. And the crushing teeth with corresponding models are replaced for the crushing rollers, so that the application range of the device is expanded.

The invention discloses an ammonia gas nozzle and a denitration device.The ammonia gas nozzle comprises a body and a guide part, the body is provided with a spraying cavity extending in the axial direction of the body, one end of the spraying cavity communicates with a spraying pipe, the other end of the spraying cavity is a spraying opening, the guide part is located on the outer side of the spraying opening, and the front end of the guide part is connected with the body; the orthographic projection of the front end of the guide piece on the first plane is located on the inner side of the jet orifice, at least part of the peripheral edge of the orthographic projection of the tail end of the guide piece on the first plane is located on the outer side of the jet orifice, and the first plane is the plane where the jet orifice is located. The ammonia gas nozzle can spray ammonia gas in a larger range, the mixing ratio of the ammonia gas and flue gas is increased, ammonia escape is reduced, the chemical reaction speed is increased, and then the denitration effect is improved.

The invention provides a preparation method of anti-breakage and anti-leakage anhydrous stemming, and belongs to the technical field of refractory materials, the preparation method comprises the following steps: S1, putting 28-32 parts by weight of corundum, 25-30 parts by weight of bauxite, 9-13 parts by weight of clay, 5-8 parts by weight of kyanite, 7-12 parts by weight of ferro-silicon nitride, 12-17 parts by weight of silicon carbide, 5-8 parts by weight of calcium carbonate and 7-10 parts by weight of modified carbon black into a dryer, heating to 100-120 DEG C, and keeping the temperature for 2-3 hours; stirring at 0.5-0.7 MPa, dehydrating, and detecting that the Engler viscosity is 9-11 and the water content is less than 0.5 wt% to obtain a dry raw material; s2, the dried raw materials are put into a stirrer to be stirred and mixed uniformly, and a first mixture is obtained; s3, adding 10-15 parts of a binding agent into the first mixture, and uniformly stirring and mixing to obtain a second mixture; and S4, extruding the second mixture from a discharge port of the stirrer to obtain the breakage and leakage prevention anhydrous stemming. The apparent porosity can be reduced, the compression strength of the anhydrous stemming can be improved, and the breakage and leakage conditions can be effectively prevented.

The invention provides a preparation method of a nano high-performance iron runner castable, and belongs to the technical field of refractory materials. The preparation method comprises the following steps: preparing the following raw materials in parts by weight: 62-67 parts of brown fused alumina, 18-22 parts of silicon carbide, 4-7 parts of calcium-doped mesoporous zirconia, 2-5 parts of vermiculite, 6-8 parts of alpha alumina micro powder, 2-3 parts of titanium dioxide, 1-3 parts of coke powder, 0.1-0.3 part of aluminum powder, 1-3 parts of silicon powder, 1-2 parts of titanium powder, 1-3 parts of nano alumina, 2-3 parts of a binding agent and 0.3-0.5 part of a water reducing agent; and S2, putting the raw materials in the step S1 into a stirrer, stirring for 10-15 minutes, and uniformly mixing to obtain the nano high-performance iron runner castable. The apparent porosity of the castable in a high-temperature use environment of 1450 DEG C is reduced, and the high-temperature compression strength of the castable is improved.

The invention discloses a preparation method of a porous fiber with a nano cellulose fibril stable bubble structure. Comprising the following steps: adding a nanocellulose fibril dispersion liquid and a foaming aid into a polymer solution, mixing, and dispersing the mixed solution to obtain a spinning solution; injecting gas into the spinning solution, and stirring to obtain a bubble type spinning solution; the bubble type spinning solution is subjected to wet spinning to obtain the porous fiber. The nanocellulose fibrils have a diameter of 10 nm or less and a length of 500 nm or more. The porous fiber prepared by the method provided by the invention has an elliptical internal closed-pore structure and high strength. Compared with a traditional solid fiber, the porous fiber shows low volume density and heat conduction efficiency due to the existence of an internal closed-pore structure, so that the thermal insulation performance is better, and the internal closed-pore structure provides more possibilities for functional modification such as phase change capsule coating, nano-particle loading and medicine loading.

The invention discloses a separated fish egg and larval fish sample collection device, and belongs to the technical field of fish egg collection, the collection device comprises a main body, the main body can be suspended and lifted on a ship side, the main body is provided with a flow path allowing a water body to vertically pass through, the flow path is internally provided with a support and a collection part, and the collection part is provided with a net body surrounding the side face of the support; the lower part of the main body is provided with a screen through which fish eggs and larvae can pass, the lower end of the screen body is provided with a lower connecting pipe, the lower connecting pipe is fixed with the lower part of the bracket, the upper end of the screen body is provided with an upper connecting pipe, the upper connecting pipe can slide along the bracket, the screen body can transversely expand in the direction far away from the bracket, and the upper connecting pipe is provided with a conical wall expanding upwards. According to the invention, the net body can be quickly lowered to the required water depth, and the catching area of the net body is enlarged during recovery, so that the catching performance of plankton is improved.

The utility model discloses a gas-liquid separation device at the flue inlet of desulfurizing absorption tower, wherein the inner wall of the absorption tower is communicated with a flue, the gas-liquid separation device comprises an arc-shaped plate and at least two triangular supporting pieces, the near end of the arc-shaped plate is welded above a flue opening of the inner wall of the absorption tower, and sawteeth are arranged at the far end of the arc-shaped plate. The length of the arc-shaped plate is larger than that of the flue opening. And the inclined edge of the triangular supporting piece is welded with the lower surface of the arc-shaped plate. According to the utility model, the direct scouring of sprayed slurry to the flue opening of the absorption tower is avoided, the slurry is prevented from flowing back to the flue along the upper top plate of the original flue, the formation and accumulation of gypsum deposits on a dry and wet interface are effectively reduced, and the safe and stable operation of a desulfurization system is ensured; meanwhile, due to the design and installation of the gas-liquid separation device, escape of the flue gas along the wall of the absorption tower is reduced, and due to the zigzag design, the flue gas and slurry are more fully contacted in the space section, so that the desulfurization efficiency is further improved.

The invention discloses a nozzle arrangement design method for a urea direct injection pyrolysis technology in a transition flue of a gas turbine, comprising the following steps: 1) establishing a solid geometric model of a flue of equal dimensions; 2) determining the number of nozzles, and determining various arrangements of the nozzles under the number of nozzles; 3) simulating the ammonia distribution of an inlet cross section of an SCR system under various arrangements of the nozzles under the premise that the total urea flow rate, flue gas parameters and flue gas flow rate are the same, and adjusting the flow rate of each nozzle at the same time, so as to obtain the variation law of the ammonia distribution of the inlet cross section of the SCR system with the nozzle arrangement and the flow rate of each nozzle; 4) according to the variation law of the ammonia distribution of the inlet cross section of the SCR system with the nozzle arrangement and the flow rate of each nozzle, determining the optimal nozzle arrangement and the corresponding nozzle flow rate under the current number of nozzles, so as to make the ammonia distribution of the inlet cross section of the SCR system uniform. The method can design and determine the arrangement of the nozzles, the number of the nozzles and the flow rate of each nozzle.

The application discloses a hot blast stove SCR ammonia injection optimization control method, device, equipment and medium, relates to the intelligent control technical field of steel smelting flue gas denitration, and comprises the following steps: when the corresponding SCR denitration system of the hot blast stove runs, system key process data is collected to determine the current system state vector; the current system state vector is input into the current world model, the obtained current potential state representation is input into the policy model, the obtained current candidate ammonia injection action and the current world model are used for state deduction to obtain the current ammonia injection action and the system state prediction result of the next moment; after the current ammonia injection action is used for control, the current world model is corrected based on the new current system state vector and the system state prediction result, the action is regenerated based on the new, previous moment current potential state representation, until the termination time, the obtained ammonia injection action sequence, state sequence and multi-objective reward function are used for optimizing the policy model. The application realizes intelligent optimization control of the ammonia injection amount.