18results about How to "Reduce slagging" patented technology

The invention provides a macromolecular agglomerant and a preparation method thereof. The high-molecular agglomerant takes 1, 3-butadiene as a main polymeric monomer and alpha, beta-unsaturated acid as a comonomer, and assistants comprise an emulsifier, an initiator and deionized water. The macromolecular agglomerant is used for further preparing large-particle-size polybutadiene latex and polyacrylate latex, the components are simple, introduction of more new monomers is reduced, the stability of the latex in the agglomeration process is improved, then ABS and ASA resin is prepared, the impact resistance and tensile property of the ABS and ASA resin are improved, and particularly the impact resistance under the low-temperature working condition is improved.

The invention is suitable for the technical field of coal, and provides a high alkali metal coal slag adhering method, which comprises the following steps: step 1, analyzing the occurrence form and content of alkali metal: firstly, analyzing the occurrence form and content of alkali metal in coal, including four forms of water-soluble alkali metal, ammonium acetate solubility, diluted hydrochloric acid solubility and insoluble alkali metal, according to the invention, the slag adhering problem of the high alkali metal coal is reduced, the combustion efficiency and environmental protection property of the coal are improved, the combustion and gasification efficiency of the coal is improved, the environmental pollution is reduced, through reasonable coal blending, the utilization efficiency of coal resources is improved, the production cost is reduced, the low alkali coal can be effectively utilized to improve the combustion characteristics of the high alkali coal, and the slag-bonding and contamination problems of a boiler are reduced; meanwhile, safe and economical operation of the boiler is guaranteed, the components of the coal ash can be effectively regulated and controlled, the utilization value of the coal ash is improved, the environmental influence is reduced, cyclic utilization of resources is achieved, and the slag adhering phenomenon of the high alkali metal coal in the combustion and gasification process can be more accurately predicted and controlled, so that effective prevention and solution measures are taken.

The invention discloses a liquid slagging boiler with a modular combustion chamber and a peak regulation method, and belongs to the technical field of fire coal consumption reduction of thermal power generating units. According to the method, on the basis of a combustion chamber of an existing liquid slagging boiler, the combustion chamber is divided into four modular combustion chambers with the same size, an independent fuel nozzle and an independent draught fan are installed on the outer side of each modular combustion chamber, so that each modular combustion chamber can be independently used, and in the peak regulation process, according to the peak regulation requirement, the modular combustion chambers can be used independently; and determining the use number of independent combustion chambers. The partition screens and the modular combustion chambers in the boiler are of detachable and splicable structures, so that each modular combustion chamber can be detached from the liquid slagging boiler to be replaced and spliced. According to the boiler, operation of the combustion chamber module can be accurately controlled according to actual load requirements, energy consumption is effectively reduced under the low-load condition, and the combustion efficiency is improved; and when the load is increased, sufficient steam supply is ensured.

The invention relates to the technical field of metallurgical equipment, and discloses a horizontal waste heat boiler and an anti-slagging optimization method and system.The system comprises an uptake flue, a radiation chamber, a convection chamber, an ash hopper, a baffle, a heat exchange tube panel, a sieve pore baffle and a streamline baffle; the method comprises the steps that a horizontal waste heat boiler numerical simulation model is built, and a baffle, a heat exchange tube panel and other components are subjected to model building according to the equal proportion of 1: 1; grid division is carried out on the built horizontal waste heat boiler numerical simulation model, and local flow characteristics and temperature distribution are captured; a multiphase mass point grid method is used, gas phase motion is described by adopting a volume average Navier-Stokes equation under an Euler framework, and particle motion is tracked by adopting a Newton second law under a Lagrange framework; and selecting a value simulation model and a value simulation method suitable for the gas-solid two-phase flow and heat exchange process of the waste heat boiler. The heat exchange capacity of the waste heat boiler is improved; the recovery rate of smoke particles is increased; and slagging of parts in the waste heat boiler is reduced.

The utility model discloses a screw conveyor rear unearthing jaw crushing quarrying system which comprises two sets of screw conveyors, and the two sets of screw conveyors are respectively matched with a driving device; cylinder bodies of the two sets of screw conveyors are connected front and back, a quarrying box communicated with the rear set of screw conveyor is arranged below the rear portion of the rear set of screw conveyor, a jaw crusher is arranged in the quarrying box, and a slurry discharging pipe is arranged on the rear portion of the quarrying box. According to the screw conveyor rear unearthed jaw type crushing quarrying system, the structural design of a double-screw rear unearthed mode of the screw conveyor is adopted, the quarrying box is arranged towards the rear end, the spare space at the front end of the connecting bridge is fully utilized, and the problem that the quarrying box is stagnated in discharging due to the fact that the volume of the quarrying box is insufficient is effectively solved.

The present application provides a kind of low load under coal mill outlet wind powder temperature regulating system and method, including temperature sensor group, flow sensor, coal dust concentration sensor, temperature regulating device and control unit, wherein: temperature sensor group is used to measure the wind powder temperature of different positions of coal mill outlet pipeline;Flow sensor is used to measure the wind powder flow of different positions of coal mill outlet pipeline;Coal dust concentration sensor is used to detect the coal dust concentration in the coal mill outlet pipeline;Temperature regulating device is used to adjust the wind powder temperature of coal mill outlet pipeline;Control unit is used to receive the signal of temperature sensor group, flow sensor, coal dust concentration sensor, calculate temperature regulating amount and output signal to temperature regulating device to the wind powder temperature of coal mill outlet.The present application ensures that the wind powder temperature of coal mill outlet is stable near the target value, improves the combustion efficiency, and ensures the stable operation of the entire thermal system.

The invention relates to the technical field of copper rod casting, and provides a control method based on copper rod casting, which comprises the following steps: step 1, a shaft furnace receives a tool changing instruction of a casting machine, and starts to reduce the air inlet pressure of an A row of burners, a B row of burners and a C row of burners of the shaft furnace so as to reduce the combustion power; secondly, according to the time interval of the semicircular pipe entering the copper inlet of the heat preservation furnace, the downtime of a casting machine is determined; 3, after the casting machine is shut down, seven burners in the row A in the shaft furnace are kept normally open, four burners in the row B are closed in a crossed mode, two burners in the row C are closed in a crossed mode, and then the casting machine begins to change tools; the effect of prolonging the service life of the shaft furnace refractory material is achieved by not stopping the furnace and prolonging the service time of the shaft furnace working layer bricks, meanwhile, slag can be reduced, copper loss can be reduced, and the quality of a copper rod is improved; and the oxygen content of the copper liquid is low, and compared with furnace shutdown, the rolling time is shortened, the pendulum shearing time is shortened, and the natural gas loss is reduced.

The invention relates to a method for preparing a prebaked anode for aluminum by adding carbon fiber powder and polymerized asphalt, which comprises the following steps of: crushing, screening and grading calcined coke to obtain aggregates with various particle sizes and ball-milled powder; mixing the ground carbon fiber powder and the calcined coke, adding the mixture into a mixing and kneading pot for mixing and kneading, preheating, adding the polymerized asphalt, and continuously heating and mixing and kneading to obtain a paste material; putting the obtained paste into a mold in batches for extrusion forming, and performing cooling forming to obtain a prebaked anode green body; and putting the cooled and molded prebaked anode green body into a roasting furnace, roasting according to a heating curve, and naturally cooling to obtain a high-quality prebaked anode finished product. Compared with the prior art, the prebaked anode has the following beneficial effects that the volume density and mechanical strength of a prebaked anode green body can be effectively improved, the volume density, compression strength and conductivity of the prebaked anode are improved, the thermal shock resistance of the prebaked anode in an aluminum electrolysis cell is improved, and the resistivity and air permeability of the anode are reduced.

This utility model discloses a side-blown furnace feeding structure, including a feeding hopper, a weighing alarm component, a feeding port vertical pipe, and a furnace top cover horn-shaped feeding port. The feeding hopper vertical pipe is coaxially inserted into the feeding port vertical pipe to form an annular gap channel. The weighing alarm component includes a weighing sensor fixed to the outer wall of the feeding hopper, an alarm device electrically connected to the sensor, and an interlocking stop feeding execution mechanism. When the feeding hopper accumulates material due to blockage, the weighing sensor monitors the weight change in real time and triggers the alarm device, simultaneously stopping the feeding. The horn-shaped opening of the furnace top cover feeding port faces the furnace chamber, reducing the contact between the material and the inner wall, reducing adhesion and slag formation. The annular gap channel forms an air guiding cavity, maintaining stable negative pressure inside the furnace, preventing flue gas from escaping, and improving smelting safety and efficiency.

The application provides a continuous casting production method of tinplate, which comprises the steps of dynamic control of a pulling speed, linkage control of cooling, dynamic adjustment of an insertion depth of a submerged nozzle and dynamic argon blowing, wherein the pulling speed control is based on the maximum section steel flow, the target pulling speed is calculated reversely according to the actual section, and the steel flow of each section is constant; the cooling water flow is compensated in linkage with the increment of the pulling speed, and the bulging of the shell is inhibited; the insertion depth of the nozzle adopts a one-way increasing insertion mode from shallow to deep in multiple stages; and the argon blowing flow is adjusted in stages according to the fluctuation of the crystallizer liquid level. The application can reduce the nozzle clogging area by more than 50%, the standard rate of liquid level fluctuation is increased to 95%, the continuous casting castability and the surface quality of the casting blank are significantly improved, and the application is suitable for the efficient and stable continuous casting production of tinplate and other aluminum-containing steels.

The application relates to the technical field of valves, in particular to a top-mounted wear-resistant shear valve which comprises a valve body, a valve cover fixed at the top of the valve body and a shear gate located in a vertical installation cavity in the valve body; the bottom end of the shear gate is provided with a bevel shear blade which is built up with a hard alloy layer, a detachable valve seat with a scraper surface is arranged on the downstream side of a flow passage of the valve body, a longitudinal guide rail matched with the shear gate is arranged on the inner wall of the vertical installation cavity, and a slag discharge groove is arranged at the bottom of the valve body. The top-mounted structure can realize integral hoisting and maintenance of internal components without disassembling pipelines, thereby shortening the maintenance time; the cooperation of the bevel shear blade and the scraper surface can forcibly cut off hard particles in the medium, and the cooperation of the guide rail support and the slag discharge design can significantly improve the wear resistance, sealing tightness and operation reliability of the valve.

This invention belongs to the field of steelmaking technology and discloses a method for making steel for piston rods. The method includes: KR pretreatment to ensure the sulfur content of molten iron is ≤0.001%; ​​during the early stage of LF refining, MnN wire is fed into the steel to control the nitrogen content at 150-200 ppm, avoiding feeding MnN wire after the RH vacuum process ends; the LF process employs a low-slag smelting mode, with no slag added except for lime, and the CaO content of the refining slag is controlled at 56-64% to maintain a viscous state; during the LF process, the argon flow rate of a single bottom blow hole in the ladle is controlled at 100-300 L / min, and the Al content of the molten steel is maintained at 0.004-0.008% throughout the process; no substances are added during the RH vacuum and soft blowing processes, and the vacuum and soft blowing times are controlled at 15-25 min and 10-20 min, respectively. Based on the above steelmaking method, the proportion of large-size inclusions in the obtained piston rod can be reduced to less than 1.5%.

This invention relates to a multi-substrate painting swirl stick and its preparation method. The multi-substrate painting swirl stick includes sodium hydroxide, stearic acid, myristic acid, potassium stearate, and nano-silica. In this invention, sodium hydroxide reacts with stearic acid to form sodium stearate, and sodium hydroxide reacts with myristic acid to form sodium myristate. Sodium stearate, sodium myristate, and potassium stearate together form a composite hydrogel soap-based system. Nano-silica acts as heterogeneous nucleation sites, guiding the formation of a microcrystalline network structure during the formation of the composite hydrogel soap-based system. During application, this microcrystalline network structure can achieve controllable interlayer slippage under shear force, thereby resulting in good adhesion, good color development on smooth material surfaces, minimal flaking, uniform color application, strong hiding power, and smooth painting.

The application discloses a method for preparing formed fuel by mixing semi-dried sludge and oil-tea camellia fruit hulls, and the method comprises the following steps: (1) washing and drying the oil-tea camellia fruit hulls, then crushing and sieving the oil-tea camellia fruit hulls to obtain oil-tea camellia fruit hull powder; drying high-moisture sludge to obtain semi-dried sludge; (2) baking the oil-tea camellia fruit hull powder under a mixed atmosphere of oxygen and nitrogen to obtain baked oil-tea camellia fruit hulls, or pyrolyzing the oil-tea camellia fruit hull powder under a nitrogen atmosphere to obtain oil-tea camellia fruit hull biochar; (3) mixing and stirring the semi-dried sludge and the baked oil-tea camellia fruit hulls or the oil-tea camellia fruit hull biochar, uniformly placing water, and then preparing formed fuel. The method is simple, easy to operate and low in cost, the prepared formed fuel particles can realize rapid reduction of urban sludge and recycling of energy, and the method has the advantages of low energy consumption, high particle strength, no pollution and the like when the formed particles are prepared.

The invention relates to the technical field of fluidized bed furnace operation, and discloses a method for prolonging the service life of a fluidized bed furnace during operation, which comprises the following steps: controlling the water content of a furnace charge to be 9-10%; the content of copper in the furnace charge is controlled to be 0.9% or below, and the content of lead in the furnace charge is controlled to be 4% or below or 6% or below; controlling the roasting temperature; the pressure in the furnace is controlled between 1.2 m and 1.4 m or between 1.3 m and 1.4 m; controlling the oxygen content in the furnace; the temperature in the furnace is adjusted through two groups of water jackets, the furnace is used for a 48m < 2 > fluidized bed furnace when the lead content is below 4%, and the furnace is used for a 16m < 2 > fluidized bed furnace when the lead content is below 6%. By accurately controlling the moisture and metal content of the charging material, the roasting temperature, the pressure in the furnace and the oxygen content and optimizing a water jacket system, scaling and corrosion in the furnace are reduced, the material reaction efficiency is improved, the equipment operation condition is stabilized, and the temperature in the furnace is uniformly distributed, so that the service life of the fluidized bed furnace is remarkably prolonged, the maintenance requirement is reduced, and the production cost is reduced. And the operation period and the stability of the whole equipment are improved.

The utility model belongs to the technical field of steel, and relates to a submersed nozzle which comprises a nozzle body, the nozzle body comprises a molten steel inlet end and a molten steel discharge end, a plurality of water outlets are formed in the tail end of the molten steel discharge end, the water outlets are strip-shaped openings and are located on the same straight line, the straight line is marked as a first straight line, and the second straight line is marked as a second straight line. The water outlets are symmetrical about the first straight line; the water outlets are integrally centrosymmetric; and each water outlet integrally forms a structure with a wide middle part and two narrow ends. According to the utility model, the possibility of slag entrapment on the liquid level is reduced, and the quality of casting blanks is improved.

The invention discloses a transformation method for a modularized combustion chamber of a solid-state deslagging boiler for peak regulation of a thermal power plant, and belongs to the technical field of peak regulation of thermal power plants. Comprising a boiler main combustion chamber which is formed by assembling a plurality of modularized split independent combustion chambers. And each split independent combustion chamber is separated by a water cooling wall to form an independent combustion cavity. And a plurality of split pulverized coal burners are mounted on the outer side of the pulverized coal distributor and are connected with a pulverized coal balancing distributor through pipelines. In addition, the multiple modularized independent combustion chambers share an original smoke pipeline, and efficient smoke exhaust of the whole system is achieved. According to the transformation method, different combustion areas can be better isolated, the combustion efficiency is improved, emission is reduced, loads can be flexibly adjusted, and fluctuation changes of power requirements are adapted.

The invention discloses a method for controlling ash deposition and slagging on a heating surface of a coal-fired boiler, relates to the technical field of coal-fired boilers, and aims to solve the technical problems that effective power supply is affected by slagging and ash deposition of a current coal-fired boiler and production accidents are easily caused. Then the coal material is pretreated, and other coal materials are doped into the coal material according to the slagging tendency of the coal material; the tangential diameter of the hearth is controlled, meanwhile, the structural design that the front wall and the rear wall are arranged oppositely is adopted in the hearth, the probability that wind impacts the furnace wall in the tangential diameter of the combustor is reasonably controlled, then the development trend of slag bonding is reduced, mixing is more sufficient, combustion is facilitated, and the combustion efficiency is improved. And meanwhile, the temperature in the boiler, the excess air coefficient in the boiler and the negative pressure strength in the hearth are accurately controlled in an assisted mode, the probability of slagging is further reduced, and therefore accumulated ash and slagging attached to the interior of the boiler are reduced.