73results about How to "Reduced scour wear" patented technology

The invention discloses a method of large-proportion coal slime blending combustion of a circulating fluidized bedboiler. The method comprises the steps of (1) coal slime screening; (2) coarse slime unloading; (3) coarse slime airing and drying; (4) conveying of humidity-qualified coarse slime to a coal handling system; (5) coal conveying of the coal handling system; (6) coal feeding of the circulating fluidized bedboiler; and (7) combustion of fuel coal in the circulating fluidized bedboiler. The method of large-proportion coal slime blending combustion of the circulating fluidized bedboiler has the advantages that after low bed pressure operational optimization is implemented, the boiler efficiency reaches up to 91.9% and is increased by 1.9% when compared with a design value, the vibration of a material return device is effectively controlled, and the abrasion of a boiler heating surface is reduced; by means of implementation of low oxygen combustion optimization, the cost can be reduced by 4,800,000 RMB annually, and the standard coal can be saved by approximately 5,120 tons annually; and the generation of part of nitric oxide can be inhibited from the angle of combustion, and the urea usage amount of an SNCR system can be reduced.

A gasification nozzle, which comprises a central oxygen nozzle, a coal-water slurry nozzle and an epoxy nozzle that are concentrically arranged from the inside to the outside, wherein the end section of the central oxygen nozzle is relative to the inner diameter of the end section of the coal-water slurry nozzle. The shrinkage is 20mm-100mm; the inclination angle of the epoxy nozzle is 20°-50°; the inclination angle of the outer side of the coal-water slurry nozzle is 30°-70°, and the inclination angle of the inner side is 30°-80°; the center The outside inclination angle of the oxygen nozzle is 30°-70°; a first locator is arranged in the epoxy channel, and a second locator is arranged in the coal-water slurry channel, and the top of the first locator is in the shape of a swirl sheet, so The included angle between the top and the feeding direction of oxygen is 20°-60°. When the gasification nozzle of the invention is used for gasification, the gasification effect of the coal-water slurry is better, the maximum production load of the gasification nozzle is increased, and the service life of the gasification nozzle is longer.

The invention provides a reducing bent pipe and pumping equipment with the same, and integrally relates to the field of material conveying. The reducing bent pipe is used in a fluid transportation piping, comprises an input end and an output end, and is characterized in that the radius of curvature of the reducing bent pipe increases from the input end to the output end. As the bending and the reducing degree of the reducing bent pipe are optimally designed, impact of transported materials on the reducing bent pipe can be effectively reduced, and the service life of the reducing bent pipe canbe prolonged.

The invention relates to a high temperature high pressure difference reducing valve, which is characterized in that the reducing valve comprises a valve body, a valve seat, and a valve core which is positioned in the valve seat and can move up and down in the valve seat; the valve core is fixedly connected with a valve rod by a thread and a pin; the valve rod is positioned in the valve body, sealed from the outside world by sealing packing and a packing gland, and can move up and down; the lower part of the valve seat is provided with a bush, a throttle orifice and a flange which is connected with the outer part; and a medium enters into a valve cavity from the side direction, and flows out from the tail end after flowing through a channel composed of the valve core and the valve seat, and the throttle orifice at the downstream of the valve seat,. Compared with the prior art, the high temperature high pressure difference reducing valve can reduce the pressure of materials with high temperature and high solid content, controls the pressure of systems and the liquid position of high-pressure tanks, not only can reduce the pressure and generate required large pressure reduction but also can carry out appropriate flow control; more importantly, the high temperature high pressure difference reducing valve can prevent harsh erosive wear formed by the high-speed flow of medium flow with high solid content under large pressure difference to the materials.

The invention discloses a high-efficiency energy-saving normal-pressure horizontal super-conducting gas boiler, comprising an inner drum, an outer drum, an elbow, a flue, a heat pipe, a water inlet and outlet pipe and a discharge pipe; the inner drum is arranged in the outer drum, a pull nail is arranged between the inner drum and the outer drum, and a burner opening is formed in the inner drum; the flue is of a structure connected by the elbow, the heat pipe is arranged on the flue, and a flue outlet is connected to the flue; the outer drum, the flue and the heat pipe are all arranged in a packaging plate embedded with perlites; a proper amount of super-conducting heat pipes are welded and distributed in a plurality of smoke chambers, a super-conducting heat pipe technology is not only applicable for the tail waste heat recycling, but also is reasonably applicable for the boiler combustion chamber structure, so the hearth radiation and convective heat transfer area is increased and the heat efficiency is improved; in addition, the smoke flow rate is reduced reasonably by the continuous 90-degrees turning design of the flue, the erosion corrosion to the super-conducting heat pipes is reduced, thereby prolonging the service life of the heat pipes and the boiler.

The invention discloses a stirrer used for molten iron mechanical stirring and efficient mixing desulphurization. The stirrer is composed of a stirring shaft and stirring blades. Each stirring blade comprises an iron meeting face and an iron opposing face, wherein the iron meeting face is composed of an upper vertical face section of the iron meeting face and a lower forerake face section of the iron meeting face, the iron opposing face is composed of an upper vertical face section of the iron opposing face and a lower forerake face section of the iron opposing face, the width b1 of the upper vertical face section of the iron meeting face and the width b1 of the upper vertical face section of the iron opposing face are both 0.25-0.35 time the diameter d of a stirrer impeller, and the width b2 of the lower forerake face section of the iron meeting face and the width b2 of the lower forerake face section of the iron opposing face are both 0.35-0.65 time the diameter d of the stirrer impeller. The stirrer used for molten iron mechanical stirring and efficient mixing desulphurization can achieve the comprehensive purposes of expanding the stirring and mixing zone of a desulfurizer, prolonging the entraining and floating-upward circulating stroke of the desulfurizer in molten iron, improving the mixing and dispersing degree of desulfurizer particles and the desulphurization efficiency of the molten iron, and prolonging the service life of the stirrer in the practical production.

The invention discloses a flue gas denitration device. The method mainly comprises a smoke dust introducing device, a flue, an air heat exchanger, a flue gas mixing pipeline, a selective catalytic reduction (SCR) reactor and a chimney; an air inlet pipeline and an air exhaust pipeline are arranged on the flue; the air heat exchanger is arranged between the air inlet pipeline and the air exhaust pipeline; the air inlet pipeline and the air exhaust pipeline between the air heat exchanger and the flue are respectively provided with an air inlet valve and an air exhaust valve; a bypass valve is arranged on the flue between the air inlet pipeline and the air exhaust pipeline; and the air inlet pipeline above the air heat exchanger is sequentially provided with a flue heater and an ammonia spraying grid. According to invention, the SCR reactor is arranged behind an electrostatic precipitator of a sintering machine, so that the scouring and abrasion of dust on a catalyst are reduced, the service life of the catalyst is improved; flue gas entering the air heat exchanger before denitration is preheated by the air heat exchanger, so that the thermal efficiency of the system is improved.

The invention discloses a material blocking plate and a lifting machine with the material blocking plate. The material blocking plate comprises a baffle, wherein two guide plates are arranged on the baffle in parallel; the guide plates adopt ladder-shaped bodies; and wear-resistant layers are formed on the upper surface of the baffle and the outer surfaces of the guide plates. The lifting machine comprises a housing, a discharge port of the lifting machine, a hopper and the material blocking plate, wherein the material blocking plate comprises the baffle; the lower part of the guide edge of one of the guide plates mounted on the baffle is flush with one side surface of the baffle; the side surface is the outer side surface of the baffle; the surface opposite to the outer surface of the baffle is the inner side surface of the baffle; the inner side surface of the baffle is obliquely welded onto the discharge port of the lifting machine through a first welding seam; and the two end surfaces of the baffle are fixedly welded with the two side surfaces of the housing through a second welding seam and a third welding seam respectively. Compared with the prior art, the material blocking effect is good, the service life is more than 2 years and the working power consumption is low.

An embodiment of the invention provides a method and a device for controlling a distributing device. The method comprises the following steps of acquiring the movement speed of the distributing device when the distributing device moves on a bin in a reciprocating manner; detecting the height of materials in the bin; calculating the width of the materials according to the height of the materials; calculating the movement time of the distributing device according to the width of the materials and the movement speed; and controlling the distributing device according to the movement time. An upper half portion of a vertical section of the bin is rectangular, and a lower half portion of the vertical section of the bin is trapezoidal. The movement range of the distributing device is adjusted according to the height of the materials in the bin, the distributing device always moves in the range of the width of the materials, so that the materials can always directly drop on a material surface of the bin and cannot collide with a side wall of the bin, the possibility that the wall of the bin is eroded and worn by the materials is reduced, the possibility of breakage of mixture particles is reduced, the flatness of the material surface can also be ensured, and the uniformity of cloth in a downstream working procedure is improved.

The invention discloses an anti-blocking molten iron blowing desulfurization spray gun with a multi-strand cyclone dispersion function. The anti-blocking molten iron blowing desulfurization spray gun is composed of a connection section, a gun body section and a blowing section, wherein the connection section is composed of a connection flange and a composite gun core in sequence, and the outer walls of the gun body section and the blowing section are a refractory material gun lining formed through pouring a refractory material; and a gun body outer diameter D of the blowing section is greater than a gun body outer diameter d of the gun body section, the composite gun core sequentially comprises an inner insertion tube, a main tube and a reinforcing tube from the inside to the outside, an inner insertion tube connector is installed on the inner wall of the bottom end of the reinforcing tube, the bottom end surface of the inner insertion tube is level with the bottom end surface of a graphite blowing tube, and wrapped with the refractory material gun lining to form a spray gun nozzle, and grooves are formed at the nozzle. According to the invention, the inherent shortages of poor reaction kinetics performance and high blocking frequency of a nozzle existing in a conventional spray gun are effectively solved through said structural design and optimization for the related structural dimensions; and meanwhile, the anti-damage capacity of the blowing section and the gun body section of the spray gun is effectively reinforced, and the purpose of prolonging the service life of the spray gun is achieved.

The invention discloses an economizer hopper of a coal-fired boiler in a power plant. In a reversing chamber of the economizer hopper of the coal-fired boiler, one to five stages of herringbone guide plates are arranged along the horizontal direction, or two to seven stages of T-shaped guide plates are arranged along the vertical direction; the nasal tip of the reversing chamber of the economizer hopper is additionally provided with a guide plate; the outlet of the bottom of a dust hopper is provided with a blocking valve; the outlet of the blocking valve is connected with an ash storage hopper; and the outlet of the ash storage hopper is provided with a blocking valve. The dust collecting efficiency of the economizer hopper is greatly improved; and the ash content of the flue gas entering an air preheater is effectively reduced. The economizer hopper has high operability and obvious effect, can reduce or thoroughly manage ash fouling in the air preheater so as to alleviate or avoid the low-temperature corrosion of the air preheater and reduce the cost of cleaning the ash fouling of the air preheater. The economizer hopper has the advantage of simple process flow, less equipment and easy implementation. The method is applicable to the reform design of the equipment which has been put into operation, and is also applicable to the system design of new equipment.

The invention discloses a top oblique insert type spray gun for air blowing slag accretion. A connecting section comprises a metal connecting pipe and a connecting part, a gun body section comprises a metal main pipe, a gun body section refractory castable lining and a gun body section V-shaped anchoring part, and a nozzle section comprises a metal spray pipe, a nozzle section refractory castable lining and a nozzle section V-shaped anchoring part. The metal spray pipe and the metal main pipe are in welded communication, and an included angle alpha formed by the metal spray pipe and the metal main pipe is greater than 0 degree and less than 180 degrees. A diffuse type nozzle facing to the molten iron surface during air blowing is arranged in the nozzle section refractory castable lining, and a through hole which corresponds to the diffuse type nozzle and communicates with the diffuse type nozzle in the radial direction is formed in the side wall of the upper half portion of the metal spray pipe in the radial direction. Advantages of the top gun air blowing auxiliary deslagging technology and advantages of the molten iron jar air brick ventilation auxiliary deslagging technology are highly gathered, all kinds of disadvantages existing in conventional top gun air blowing or air brick ventilation are fully overcome, and the comprehensive purposes of reducing deslagging iron losses, shortening deslagging time, prolonging the service life of a molten iron jar and the air blowing slag accretion spray gun and lowering deslagging process cost are realized.

The invention discloses a ceramic ball valve high in corrosion resistance and erosive abrasion resistance. Two valve bodies are in linkage with a valve cover, and the two valve bodies and the valve cover are sealed through an O-type gasket. Stepped valve seats are installed in the centers of the inner sides of the two valve bodies respectively. Shoulders of the stepped valve seats and the inner sides of the valve bodies are fixedly matched through resilience gaskets. The inner sides of the valve seats and an arch gap valve ball form a surface contact seal. Graphite packing is embedded into the circumferential gap of the connection between a valve rod and the valve cover and fixedly pressed through bolts by a packing gland. One end of the valve rod is inserted into the arch gap valve ball to be positioned, the other end of the valve rod is connected with an execution mechanism, the execution mechanism drives the arch gap valve ball to rotate through the valve rod, and the arch gap valve ball is a valve ball of a nonsymmetrical structure. The ceramic ball valve can be applied to multi-phase flow abrasion working conditions of coal chemical industries, petrochemical industries and electric power systems and is excellent in high temperature resistance and abrasion resistance, long in service life, good in comprehensive performance, capable of meeting the using requirements in the multi-phase flow harsh erosive abrasion environment and broad in application prospect.

The invention relates to the field of material grinding systems, in particular to a vertical mill grinding system used for preparing raw materials or concrete. The vertical mill grinding system comprises a feeding device, a vertical mill, an efficient separator, a ground material conveying device, an iron removal device, an elevator, a material distributing device, a rotoclone collector, a circulating fan, a dust collector, an exhaust fan and a chimney. According to the vertical mill grinding system, the efficient separator and the vertical mill are of an integrated structure, and the system has the advantages of being reasonable in structural style and compact in arrangement; the efficient separator is provided with an upper material scattering device and a lower material scattering device, materials can enter the upper material scattering device and the lower material scattering device for material scattering and dispersing, material concentration of the upper region of the separator can be lowered, and the separation efficiency can be improved. In addition, the efficient separator integrates material drying, material roughing classification and material concentration classification functions, so that the equipment investment is reduced, and the burdens of enterprises are lowered.

The invention discloses a novel oil motor system and the adopted control method. The system includes a hydraulic control valve and an oil motor; the oil motor is only composed of a cylinder body, a piston and a piston rod, and the piston is arranged in the cylinder body , and the piston divides the inner space of the cylinder into two cavities, the piston rod is fixed on the piston; it also includes two oil holes arranged on the cylinder, and one of the oil holes communicates with one of the cavities, The other oil hole communicates with the other cavity; the hydraulic control valve has at least two control oil ports, and the two oil holes are respectively connected to different control oil ports of the hydraulic control valve through separate oil pipes, and the two control oil ports The flow direction of the hydraulic oil at the port can be switched. The method is the control method of the above structure, and this scheme provides a high-quality, low-cost, and highly versatile oil-motor system involvement and control scheme.

The invention relates to a drilling tool filter screen for realizing protection of the internal wall of a drilling tool. The drilling tool filter screen is arranged at the upper part of a small end of the internal thread of the drilling tool and an opening thereof faces downward; the drilling tool filter screen adopts a mode that drilling fluid flows into an inner cavity of the filter screen by filter holes on the filter screen from the outer part of the filter screen to filter impurities. The drilling tool filter screen for protecting the internal wall of the drilling tool guarantees that the impurities in the drilling fluid are filtered, simultaneously can protect the internal wall of the drilling tool effectively, reduce drilling tool accidents caused by washing out and abrasion of the drilling fluid to the internal wall of the drilling tool, prolong the service life of the drilling tool and can be widely applied to fields of drilling operation of petroleum gas.

The invention relates to a novel structure of rotary kiln lining refractory spreading brick. Its characteristic: there is metal structural frame in the spreading brick, the castable refractory. Is poured at the metal structural frame to form spreading brick and is welded on the rotary kiln drum body by the metal structural frame, in the rotary kiln length direction, inter-adjacent spreading bricks are connected to form one piece as a whole by mosaic rod on the metal structural frame.

A falling-film evaporator balance device comprises: a pressure balance tube, a pipeline, an upper head, a heating tube and a vapor-liquid separation chamber, wherein the lower end of the heating tube is disposed in the vapor-liquid separation chamber, the upper head is disposed on the heating tube, the pressure balance tube is connected between the upper head and the vapor-liquid separation chamber, and the pipeline is mounted on the upper head. Pressure between the upper head and vapor-liquid separation chamber in the evaporator is balanced, reducing erosive wear of a heating tube bundle of the evaporator from material.

A gas-washing device for a gas producer comprises a gas-washing box; a distributor is disposed at a coal gas inlet of the gas-washing box; a coal gas inlet pipe is connected with the upper end of the distributor; the invention is characterized in that: the distributor comprises a distributor body and a reinforcing rib plate; the distributor body is a cylinder; at least two separating ribs are disposed on the inner wall of the cylinder and are arranged staggeredly as a matrix in the cross section of the cylinder; the separating ribs divides the cylinder cavity into at least four identical sector gas-introducing channels; the reinforcing rib plate comprises a round center plate and bar-shaped plates uniformly and divergently distributed at the periphery of the center plate; the reinforcing rib plate is fixed above the inner wall of the distributor body and the separating ribs; the size of the reinforcing rib plate fits the inner wall of the cylindrical cylinder body. The gas-washing device for a gas producer of the invention is washing resistant, has a long life, and has uniform gas flow distribution.