30results about How to "Solve scour" patented technology

The invention discloses a smoke denitration device for preventing a catalyst from being plugged by popcorn ash. The device comprises a smoke inlet (1), a horizontal connecting flue (2), a vertical connecting flue (5), a denitration reactor (7), an outlet flue (9) and a smoke outlet (10) which are communicated in sequence, wherein an ammonia spraying grating (4) is arranged in the vertical connecting flue (5); and a rectifying device (6) and a plurality of layers of catalysts (8) are arranged in the denitration reactor (7) along the smoke flowing direction. The device provided by the inventionis characterized in that a metal screen (3) is arranged on the upstream of the ammonia spraying grating (4) in the vertical connecting flue (5). The smoke denitration device for preventing the catalyst from being plugged by the popcorn ash provided by the invention can be used for efficiently intercepting the 'popcorn ash' with a large grain size in the coal-fired smoke, separating the 'popcorn ash' from the smoke, and solving the problem that the catalyst is brushed and plugged by the 'popcorn ash'.

The invention provides a high-durability fiber grating scouring sensor which comprises a metal shell and a measuring part arranged in the metal shell and connected with the metal shell, wherein the measuring part is composed of a FRP uniform strength beam and two fiber gratings stuck on the upper and lower surfaces of the FRP uniform strength beam, the leading-out wire of the fiber grating passes through the metal shell and is educed, the inner wall of the metal shell is provided with a metal baffle plate provided with a calcium carbide, the lower part of the metal shell is provided with a dowel bar, a prepressing small-rigidity spring is arranged between one end of the dowel bar and the inner wall of the metal shell, and the other end of the dowel bar is provided with a FRP disc. The scouring sensor has the advantages of the high precision, the convenient arrangement and the adjustable range and resolution, and is applied to the foundation soil scouring monitoring of health monitoring of civil engineering structure and the foundation soil scouring monitoring of structural test.

The invention discloses an anticorrosive and wear-resistant material for the spraying zones of desulfurization towers. The material comprises an impermeable material, a reinforcing material and a wear-resistant material, wherein the impermeable material mainly comprises vinyl ester resin added with glass flakes; the reinforcing material mainly comprises vinyl ester resins, glass fiber cloth and glass fiber chopped strand mats; the wear-resistant material mainly comprises vinyl ester resin added with wear-resistant ceramic packing particles; and the wear-resistant ceramic packing particles can be divided into packing I, packing II and packing III mixed in certain proportion. The material disclosed by the invention has the advantages of low difficulty in construction, low cost, good anticorrosive effect, good wear-resistant performance, convenience in application and maintenance, and capability of effectively preventing the damage from an external force and an internal stress and resisting the corrosion of acid liquor or the erosion of flue gas, effectively resolving the problems of erosion, wear and damage of the wear-resistant material easily occurring in spraying zones of desulfurization towers, prolonging the service life of an anticorrosive layer, and greatly reducing the maintenance cost.

The invention discloses a technology for welding a carbon steel overlaying welding layer of a tube plate of a high pressure heat exchanger with a low carbon steel tube in a sealing way, comprising the following technological processes, i.e. a step one of welding carbon steel on the tube plate of the high pressure heat exchanger in a submerged arc overlaying way, thermally treating the overlaying welding layer and the tube plate under the condition of passing 100% UT (Ultrasonic Test) and 100% MT (Magnetic Test) flow detection, and increasing the overlaying welding layer to the range of 6mm to 8mm in a machining way, wherein the groove structure of the tube plate is in the form of an aligned groove, the low carbon steel tube is aligned with the overlaying welding layer of the tube plate, and the sealing welding groove of the overlaying welding layer of the tube plate is chamfered at 2*45 degrees; a step two of preheating to 80 DEG to 100 DEG before welding, and welding the low carbon steel tube in the groove of the overlaying welding layer of the tube plate in a point way before welding as well, wherein the point welding enables the root part to be thoroughly welded without welding sticks; a step three of implementing sealing welding on the groove by adopting an automatic argon arc welding, implementing 100% PT (Penetration Test) flow detection on the welded junction after the completion of sealing welding, and eliminating surface defects of the welding line. According to the technology for welding the carbon steel overlaying welding layer of the tube plate of the high pressure heat exchanger with the low carbon steel tube in the sealing way, the surface of the welding line of the carbon steel subjected to the sealing welding is smooth and flat, and no needle-like air holes are formed in the near surface and the surface of the welding line; therefore, the long-term scour by supplied water can be completely withstood.

The invention discloses an anticorrosive material for a smoke discharge and desulfurizing chimney, which comprises an anti-permeability material and an abrasion-resistant material, wherein the anti-permeability material mainly comprises EpigenXD modified epoxy resin added with glass flakes, and the abrasion-resistant material mainly comprises the EpigenXD modified epoxy resin added with abrasion-resistant white corundum filler particles. The abrasion-resistant white corundum filler particles are divided into fillers I and fillers II, and the fillers I and the fillers II are mixed according to a certain proportion. The anticorrosive material for the smoke discharge and desulfurizing chimney is small in construction difficulty, low in cost, good in anticorrosive effect, good in abrasion-resistant performance, capable of effectively preventing damage of external force and internal stress and resisting to corrosion of acid liquor or scour of smoke and convenient in use and maintenance. In addition, scour and abrasion damage which easily happen to the anticorrosive material of the smoke discharge and desulfurizing chimney are effectively avoided, service life of an anticorrosive layer is prolonged, and maintenance cost can be reduced to a large extent.

The invention discloses a simulation test device and method for a multi-angle tilt drilling grouting technology for a coal seam bottom plate under the effect of pressure-bearing flowing water. The simulation test device comprises a test rack, a pressure-bearing aquifer water source applying device, multi-angle drilling and different hole diameter fracture simulation devices and a grouting device;the test rack is used for bearing the multi-angle drilling and different hole diameter fracture simulation device; the multi-angle drilling and different hole diameter fracture simulation devices aredivided into multiple sets according to drilling angles and the sizes of fractures; the pressure-bearing aquifer water source applying device comprises a constant-pressure water pump, a water pressureadjusting valve, an open source fracture and sealed fracture control valve and a flowmeter; and the grouting device comprises a grouting machine, a safety valve, a slurry flushing valve, a grouting channel valve, a grouting hole selecting switch and a disassembly-free flushing valve. According to the simulation test device, simulation of a grouting process layout process, simulation of a dynamicprocess of slurry flowing to diffusion, simulation of drilling tilt angles to the slurry diffusion influence, and scenario simulation of precipitation and condensation mechanisms can be achieved.

The invention discloses a construction method for preventing and controlling the scour of bridge foundations in rivers in mountainous areas. The method specifically comprises: constructing a retaining dam on a river downstream of the bridge foundation to form a river energy-dissipating and speed-reducing pool. The construction method of the dam is as follows: drive at least one row of fixed piles in the riverbed along the section of the river, and the top of the piles is higher than the surface of the riverbed, and place a water retaining structure upstream or in the middle of the fixed piles to form a dam. Compared with the existing method for prevention and control of foundation erosion of bridges in mountainous rivers, the construction is simple, and only one dam needs to be constructed, and the cost is greatly reduced. Moreover, the setting of the dam can make the riverbed near the eroded bridge foundation back to silt, and gradually restore the embedding depth of the bridge foundation, thereby fundamentally solving the problem of bridge foundation scour.

The invention relates to the technical field of hull protection, in particular to a protection device with a movable protection plate for semi-submersible barge bottom-sitting construction and a construction method. The protection device comprises a plurality of scour prevention plates, each scour prevention plate comprises a steel rib frame, each steel rib frame is formed by connecting a plurality of steel rib frame units, each mooring rope is connected with the corresponding steel rib frame unit, and a movable protection plate is hinged to the front edge of each scour prevention plate. A baffle used for limiting the rotating angle of the movable protection plate is further arranged on the anti-scouring plate, and the multiple mooring ropes are connected to a winch; the semi-submersible ship anti-scour protection device can conduct effective anti-scour protection on the periphery of a ship body, is simple in structure, convenient to obtain materials and low in manufacturing cost, canbe prefabricated and assembled in advance on land, can be rapidly assembled with the ship body, improves efficiency, has good anti-scour capacity, conducts re-protection on the front edge position ofan anti-scour plate, and further scouring of the foundation is effectively protected.

The invention discloses a diaphragm-free shock tunnel throat device and a test method thereof. The throat device comprises a driven section, a piston supporting section and a throat section; a piston ring is arranged in the piston supporting section and moves front and back to form a moving cavity; and an air inlet through hole is formed in the round-tube-shaped air inlet cylinder protruding forwards from the throat section, an end socket is installed at the front end of the round-tube-shaped air inlet cylinder, the end socket and the piston ring form a ball head conical surface line sealing structure, and an inflation hole and a breathing hole which are communicated with the movable cavity are further formed in the throat section. During test, high-pressure test gas pushes the piston ring to move backwards, gas in a moving cavity is exhausted through a breathing hole, the piston ring impacts the front end face of the throat section, the piston ring and the spherical head conical surface line sealing structure of the sealing head lose efficacy, and the high-pressure test gas enters the shock tunnel throat through the gas inlet through hole. The throat device and the test method are simple and reliable, the test efficiency is high, and the damage to the test model and the test sensor on the test model is small.

The invention provides a sediment impulse cleaning system of a slurry pipeline, which comprises a slurry feeding pipeline and a slurry discharging pipeline; the slurry discharging pipeline comprises afront end slurry discharging part, a sediment pipeline and a back end slurry discharging part which are linked in order and in series; the slurry discharging pump is mounted on the back end slurry discharging part, the slurry discharging pipeline is horizontal, and the section area of the sediment pipeline is more than the section area of the front end slurry discharging part; an impulse pump isfurther mounted between the slurry feeding pipeline and the sediment pipeline, and a fluid inlet pipe of the impulse pump is linked to the slurry feeding pipeline in series; a fluid outlet pipe of theimpulse pump is linked to the upstream of the sediment pipeline in series; the back end slurry discharging part is further linked with a sediment collecting box in parallel, and the upstream of the sediment collecting box is connected to the downstream of the sediment pipeline through a stone feeding pipe; the stone feeding pipe is located at the lower side of the back end slurry discharging part, the downstream of the sediment collecting box is linked with the downstream of the back end slurry discharging part through a recycling pipe. The cleaning system can clean the sediment box continuously without shutdown.

The invention discloses a bridge guardrail base shaping combined template which comprises a fixing support, a plurality of guardrails are fixedly connected to the fixing support, two combined templateframes are fixedly connected to the side faces of the bottom ends of the guardrails in a sleeving mode, and baffles are fixedly connected to the two combined template frames respectively; wherein bolts are arranged on one combined template frame and one baffle, clamping grooves are formed in the other combined template frame and the other baffle, the clamping grooves are connected with the boltsin a clamped mode, a plurality of first water collecting tanks are fixedly connected to the two baffles, and feeding ports are formed in the two combined template frames. According to the bridge guardrail base shaping combined template, in rainy days, the gravity of rainwater is used for controlling a sliding plate to close the feeding ports, water can be prevented from entering the combined template frames through the feeding ports, the problem that slurry in the combined template frames is scoured by rainwater is solved, the slurry is prevented from being diluted by rainwater, and the shaping effect of the combined template frames is improved.

The invention discloses a counter-flow axial energy dissipation valve, belongs to the technical field of valves, and aims at solving the problem that scouring is caused to a paddy field because a gatevalve or a ball valve is adopted for existing irrigation for the paddy field. The counter-flow axial energy dissipation valve comprises a valve cover, a valve body, a flow guide sleeve, a first sealing ring, a hand wheel, a valve plate and a second sealing ring, wherein a water inlet port and a water outlet port are formed in the valve body; the direction of the water inlet port in the valve bodyis vertical to the direction of the water outlet port; the valve plate is arranged at the water inlet port in the valve body, and the first sealing ring is arranged between the valve plate and the valve body; the valve cover is fixedly connected with the valve body; the hand wheel is connected with the valve cover through a screw rod, and due to the fixed connection of the screw rod and the valveplate, the valve plate is enabled to move in the direction of the water inlet port of the valve body; and the flow guide sleeve and the valve cover are sealed through the second sealing ring, and fixed together through a fastener, so that a water outlet direction is opposite to a water inlet direction. According to the counter-flow axial energy dissipation valve, the resistance of water is increased through the valve plate, so that the dynamic energy of water is reduced; and the dynamic energy of water is further reduced by enabling the water inlet direction to be opposite to the water outletdirection, so that the scouring of high-pressure water to the paddy field is avoided.