35results about How to "Avoid scour wear" patented technology

Provided is a boiler water wall air film protection device. A plurality of tuyeres are arranged obliquely in an upstream boiler wall of high-temperature flame and flue gas coal dust airflow in the boiler water wall area and each tuyere communicate with an air flue arranged on the outer side of a hearth. Air is jetted into the hearth through the tuyeres, airflow forms an air curtain between the downstream portion of the flame and high-temperature flue gas flow and a water wall along the flue gas and the air curtain is towards the water wall under pushing of the flame and the high-temperature flue gas to form an air isolation layer, on the one hand, the action of the air curtain can push the wall-eroding coal dust airflow or flame to the center of the cross section of the hearth, so that erosive wear and corrosion to the water wall from the wall-eroding coal dust airflow or flame are avoided, and on the other hand, the air curtain is turned to the downstream water wall area under the action of the upstream high-temperature flame and flue gas, a layer of oxidizing atmosphere protection film is formed on the downstream water wall area, and the problem of high-temperature corrosion of the water wall is solved fundamentally.

The invention provides a gas distributor for an ash agglomerating fluidized-bed gasification furnace. The gas distributor comprises a gasification furnace shell, a tapered distribution plate, at least three distributed injection pipes, a slagging pipe and a gas inlet pipe of a gas chamber, wherein one end of the slagging pipe is connected to the bottom of the tapered distribution plate, and is open, and the other end of the slagging pipe penetrates through the gasification furnace shell, and is connected with a gasification agent gas source. The gas distributor is characterized in that one end of each distributed injection pipe is connected to the lower part of the tapered distribution plate, and is open, and the other end of each distributed injection pipe penetrates through the gasification furnace shell, and is connected with the gasification agent gas source; and openings of the distributed injection pipes in the tapered distribution plate are symmetrically and uniformly distributed about the center of the slagging pipe. The gas distributor is high in fluidization performance, adapted to long-cycle running, simple in structure and applicable to a large-sized fluidized-bed gasification furnace.

The invention discloses a high-temperature solid particle heat exchange system. Gas is taken as an intermediate heat exchange medium between high-temperature particles and a power cycle working medium, and the intermediate heat exchange medium is used for heat exchange between the high-temperature particles and the power cycle working medium, so that the technical problems of low heat exchange efficiency, serious abrasion of a heat exchange surface and the like of a particle heat exchanger are effectively solved. According to the high-temperature solid particle heat exchange system, leaked particles in the particle lifting process are recycled through pneumatic conveying, a solution is provided for heat recycling of the conveyed gas, low-temperature particles leaked in a particle lifting system or other conveying systems are conveyed into a low-temperature particle storage tank through a pneumatic conveying device, the low-temperature particle storage tank is a positive-pressure storage tank, and after the conveyed gas of the pneumatic conveying device is continuously input, positive pressure is formed in the tank, heat exchange gas in the particle/gas heat exchanger is effectivelyprevented from flowing back into the low-temperature particle storage tank, the pressure of the low-temperature particle storage tank is balanced through a check valve, the conveyed gas is guided into the particle/gas heat exchanger, waste heat of the low-temperature particle storage tank is recycled, and the particle heat loss is effectively reduced.

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 flue-gas purifying system for a boiler. The flue-gas purifying system comprises a mixed reaction tower and a dust and nitrate filter which are communicated. The flue-gas purifying system is characterized in that flue gas is firstly desulfurized by the mixed reaction tower, then is dedusted and denitrified by the dust and nitrate filter, and the flue-gas flow is firstly dedusted and then is denitrified when passing through the dust and nitrate filter. Therefore, the flue gas is purified according to the sequence of desulfurization, dedusting and denitrification, so that the generation of NH4HSO4 in denitrification of the flue gas is avoided, further ash blocking of an air preheater and corrosion of equipment are avoided, and the catalyst poisoning caused by alkali metal and dust particles in the flue gas is avoided to guarantee the efficiency of denitrifying reaction.

The invention provides a desulfurization slurry spraying device. The desulfurization slurry spraying device is composed of two or more layers of spraying layers, wherein the spraying layers are sequentially distributed in a desulfurization tower from top to bottom, the spraying layers comprise primary mother tubes, supporting beams, secondary mother tubes, branches, first nozzles and second nozzles, the primary mother tubes are supported by the supporting beams, two ends of each supporting beam are fixed to a tower wall of the desulfurization tower, the corresponding secondary mother tubes are connected with two sides of each primary mother tube, the corresponding branches are connected with two sides of each secondary mother tube, the tail ends of the branches are connected with nozzles, the nozzles comprise the first nozzles or the second nozzles, each two adjacent spraying layers are composed of an upper-layer spraying layer and a lower-layer spraying layer, and an included angle beta of downward projections of the corresponding primary mother tube of each lower-layer spraying layer and the corresponding primary mother tube of the corresponding upper-layer spraying layer exists. By means of the spraying device, the phenomenon of escape of smoke along a wall can be solved basically, the desulfurization rate and the dust removal rate are improved, a liquid-gas ratio can be reduced appropriately, and more strict requirements of environmental protection can be met.

The invention discloses a high-pressure difference sleeve adjusting valve. The high-pressure difference sleeve adjusting valve comprises a valve body, a valve cover and a valve inner piece which is arranged in the valve body and the valve cover. The valve inner piece further comprises a valve cage, a valve seat, a valve rod and a valve element. The valve element is fixedly connected with the lowerend of the valve rod. The valve cage and the valve seat are overlapped up and down and are of a sleeve structure relative to the valve element. A first medium pressure reducing buffer space is reserved between the valve cage and the upper segment of the valve element, a second medium pressure reducing buffer space is reserved between the valve seat and the lower segment of the valve element, andthe three-stage pressure reducing adjusting valve is formed with a third medium pressure reducing buffer space. According to the high-pressure difference sleeve adjusting valve, by means of the firstmedium pressure reducing buffer space, the second medium pressure reducing buffer space and the third medium pressure reducing buffer space, multi-stage pressure reducing is achieved, the phenomenon that the sealing face of the valve is prone to being scoured by high-speed medium fluid and erosion is caused is eliminated, and the problems that the sealing face is blown damage, inner leaking and erosive abrasion are caused, and the noise is large and other problems are avoided.

The invention discloses dust removal and denitration integrated equipment for flue gas. The dust removal and denitration integrated equipment comprises a shell. A filter box is arranged in the shell and is provided with a dust removal portion and a denitration portion, and the flue gas can be denitrated by the denitration portion after dust in the flue gas is removed by the dust removal portion. The dust removal and denitration integrated equipment has the advantages that most alkali metal particles and the dust in the flue gas are removed before denitration reaction is carried out, and accordingly catalyst poisoning due to the alkali metal particles in the flue gas can be prevented; erosive wear of the denitration portion due to the dust in the flue gas can be prevented, accordingly, the denitration efficiency of the denitration portion can be improved, and the service life of the denitration portion can be guaranteed. The invention further discloses the filter box of the dust removal and denitration integrated equipment.

The invention relates to a novel stripping element tight connecting device. A stripping steam vertical pipe passes through a cone-shaped baffle plate, and the stripping element tight connecting device is tightly connected with the stripping steam vertical pipe and the cone-shaped baffle plate. The stripping element tight connecting device comprises a compressing baffle plate, a connecting plate, a compressing ring, a silk screen, a sleeve and ceramic fibers, wherein the inner side face of the compressing baffle plate is fixedly connected with the stripping steam vertical pipe, the upper end of the connecting plate is fixedly connected with the compressing baffle plate, the lower end of the connecting plate is fixedly connected with the compressing ring, the compressing ring extends into the sleeve, the silk screen is located below the compressing ring and meanwhile is arranged on the top of a circular gap between the sleeve and the stripping steam vertical pipe, the ceramic fibers are filled in the circular gap below the silk screen, the sleeve is fixedly connected with the cone-shaped baffle plate, and the circular gap is formed between the lower end opening of the sleeve and the stripping steam vertical pipe. According to the technical scheme, not only can the free swelling deformation between the cone-shaped baffle plate and the stripping steam vertical pipe be ensured, but also the device has the sealing effect and can be used for effectively preventing the stripping steam vertical pipe from being worn through.

The invention relates to a pulverized coal pyrolysis furnace with uniform material and pressure-bearing structure, which mainly includes: a furnace body, a radiant tube, and a material-leveled and pressure-bearing structure, wherein the multi-layered radiant tube is arranged in the furnace cavity and forms a hollow In the gear area, the uniform material and pressure-bearing structure is arranged in the neutral gear area, and the uniform material and pressure-bearing structure includes: a support part, a distribution cap and a connecting part, wherein the support part is arranged along the horizontal direction; the The head of the material distribution cap is arc-shaped, and the bottom of the material distribution cap is arranged on the support part; the connecting part is fixed on the furnace wall, and is respectively connected to the two sides of the support part through pin shafts. The ends are connected, and the supporting part is fixed on the furnace wall. In the present invention, by arranging material distribution and pressure-bearing structures in the neutral area, the pulverized coal can be evenly divided and buffered, and the impact loss of the pulverized coal to the equipment and the furnace body collided; at the same time, the furnace body is strengthened. Furnace operating pressure bearing capacity, has the function of stabilizing the furnace body.

The invention provides a tee-joint switching device for boiler denitration. The tee-joint switching device comprises a frame and a sealing baffle. The frame is located among the connection position of an inlet and an outlet of a flue of a denitration reactor, a flue of a low-temperature coal economizer or air pre-heater and a flue of a high-temperature coal economizer or air pre-heater. The sealing baffle is arranged on the frame, located at one end of the connection position of the inlet and the outlet of the denitration reactor and hinged to the frame. The sealing baffle can move vertically with the connection position of the inlet and the outlet of the flue of the denitration reactor as the axis, and thus the tee-joint switching device can be opened and closed.

The invention discloses a low-value silicon powder recycling system, comprising a low-value silicon powder reactor, wherein the low-value silicon powder reactor comprises a reactor body, the reactor body is mainly formed by a gas distribution section located at the lower part, a reaction section located at the middle, and a gas-solid separation section located at the upper part, the gas distribution section comprises a feed gas distributor located below the reaction section and a feed gas inlet formed in the lower side of the feed gas distributor, the gas-solid separation section is provided with a synthesis gas outlet, the reaction section is provided with a silicon powder inlet and a heating device, and a reaction gas distributor is further arranged in the reaction section. The low-valuesilicon powder recycling system disclosed by the invention reduces the speed of gas flow in the reactor, so that low-value silicon powder can fully react with feed gas, reaction time is prolonged, the recovery rate of the low-value silicon powder is improved, the condition that the low-value silicon powder is treated as solid waste is avoids, raw material waste is reduced, and production cost islowered.

The invention discloses a front wall heating surface structure of a CDQ (Coke Dry Quenching) waste heat boiler. In order to solve the problem of water circulation faults of a conventional water-cooled wall of a CDQ waste heat boiler, the front wall heating surface structure of the CDQ waste heat boiler comprises a water-cooled wall section and a lateral washing section; a pipe at the water-cooled wall section extends to the interior of a gas duct at the tail part of a waste heat boiler to form the lateral washing section; the axial line of a pipe at the lateral washing section forms an inclined angle of not larger than 30 degrees with the horizontal plane; and one end of the pipe at the lateral washing section is communicated with the pipe at the water-cooled section, and the other end is fixed on a lower interconnecting box close to a front wall or a rear wall. The pipe on the water-cooled wall of the front wall of the CDQ waste heat boiler extends to the interior of the gas duct at the tail part of the waste heat boiler to form the lateral washing section, so that the heat absorption capacity of the front wall heating surface is increased, and the water circulation safety of the front wall heating surface is improved.

The invention relates to the technical field of flue gas desulfurization and denitrification equipment, and discloses a desulfurization and denitrification device for steel sintering flue gas. The device comprises a denitrification chamber, a desulfurization chamber, an atomizing nozzle and a liquid inlet pipe; spoilers are fixedly arranged on the inner wall of the liquid inlet pipe; a cavity is formed in the atomizing nozzle; a through groove is formed in the atomizing nozzle; electric heating wires are fixedly arranged inside the through groove and the cavity; and a spring is fixedly arranged on the bottom surface of the desulfurization chamber. According to the desulfurization and denitrification device for steel sintering flue gas, a urea solution generates turbulence and rotates alongthe surfaces of the spoilers when passing through the spoilers, and the solution forms a vortex-like flow in the liquid inlet pipe, so that separated crystals cannot be attached to the pipe wall, andthen smoothness of the nozzle is ensured. Meanwhile, the urea solution is heated by the electric heating wires when reaching the nozzle, so that the separated crystals are dissolved in the solvent again, and blockage of the nozzle is further avoided.

The invention discloses a hearth temperature water-cooling control device for a large circulating fluidized bed boiler. By the adoption of the hearth temperature water-cooling control device for the large circulating fluidized bed boiler, the problem that the hearth temperature of a circulating fluidized bed boiler is slightly higher and difficult to control is solved. The hearth temperature water-cooling control device for the large circulating fluidized bed boiler comprises a hearth, a water-cooling partition wall, a steam pocket, connecting pipes, an upper header and a lower header, wherein the water-cooling partition wall, the steam pocket, the connecting pipes, the upper header and the lower header are located in the hearth. The hearth comprises a hearth roof, a front wall, a rear wall, a left side wall and a right side wall, wherein a rectangular cylinder is formed by the front wall, the rear wall, the left side wall and the right side wall. The water-cooling partition wall comprises a plurality of heat exchange pipes, abrasion-proof fins and flat steel, wherein the heat exchange pipes are arranged on the same plane in parallel, the flat steel is welded between every two adjacent heat exchange pipes, and the heat exchange pipes and the flat steel are arranged linearly; the abrasion-proof fins are welded to the two sides of each heat exchange pipe. The water-cooling partition wall horizontally extends to the middle of the hearth and vertically penetrates through the hearth. The upper end and the lower end of the water-cooling partition wall communicate with the upper header and the lower header correspondingly. The upper header and the lower header communicate with the steam pocket through the connecting pipes, and a circulation loop is formed. One side of the water-cooling partition wall is fixedly connected to the middle of the front wall of the hearth and is perpendicular to the front wall, and the other side of the water-cooling partition wall horizontally extends to the middle of the hearth.