141results about How to "Improve steady flow performance" patented technology

The invention provides a vapor-liquid two-phase flow tube shell type heat exchanger. The heat exchanger comprises a shell, wherein sealing heads are arranged at two ends of the shell respectively; tube plates are arranged in connection positions between the sealing heads and the shell; heat exchange tubes are connected with the tube plates at two ends; vapor phase in vapor-liquid two-phase flow can be condensed into liquid phase in the heat exchange process; the vapor-liquid two-phase flow flows in a tube process; separation devices used for decreasing vibration and reducing noise are arranged in the heat exchange tubes; a plurality of separation devices are arranged in the same heat exchange tube; the length of the separation devices is gradually reduced along the flowing direction of flow in the heat exchange tubes. According to the vapor-liquid two-phase flow tube shell type heat exchanger, the vibration of the tubes can be decreased to a maximum extent due to the length change of the separation devices when the vapor-liquid two-phase flow flows in the tubes; the noise level is reduced; meanwhile, the flowing resistance is reduced; the heat exchange uniformity is improved.

The invention provides a tube-shell heat exchanger. The tube-shell heat exchanger comprises a housing, wherein sealing heads are arranged at two ends of the housing; tube plates are arranged at positions where the sealing heads are connected to the housing; heat exchange tubes are connected to the tube plates at two ends; gas phase in gas-liquid two-phase current is insoluble or slightly-soluble gas, namely, gas cannot dissolve in liquid in the heat exchanging process. The tube-shell heat exchanger is characterized in that current stabilizers for absorbing vibration and reducing noise are arranged in the heat exchange tubes; a plurality of current stabilizers are arranged in one heat exchange tube; the spacing between adjacent current stabilizers gradually increases in the flowing direction of the liquid in the heat exchange tubes until reaching some position, and then the spacing between the adjacent current stabilizers gradually decreases from the some position. According to the heatexchanger, the vibration of pipelines can be minimized based on the spacing change of the current stabilizers while the pipelines are subjected to gas-liquid two-phase flowing, and moreover, the noise level is decreased, and meanwhile, the flowing resistance is reduced.

The invention provides a condensable heat exchanger with annular separation devices. The condensable heat exchanger comprises a shell. End sockets are arranged at the two ends of the shell correspondingly. A pipe plate is arranged at the connecting position of each end socket and the shell. A heat exchange pipe is connected with the pipe plates at the two ends. A steam phase in steam-phase and liquid-phase flow can be condensed to form a liquid phase in the heat exchange process, and the steam-phase and liquid-phase flow flows in a pipe pass. The separation devices are arranged in the heat exchange pipe. Each separation device comprises a core and a housing, wherein the core is arranged in the housing, the housing is connected with and fixed to the inner wall of the heat exchange pipe, the core comprises a plurality of concentric pipes and fins, and the fins are connected with the adjacent concentric pipes. According to the heat exchanger of a novel structure and with the separation devices, heat transfer is intensified when the steam-phase and liquid-phase flow flows in the pipe, meanwhile, pipe vibration is weakened, and the level of noise is lowered.

The invention provides a power plant boiler flue gas waste heat utilization system. The power plant boiler flue gas waste heat utilization system comprises a plurality of parallel heat pipes, a flue gas passage and an air passage, the heat pipes comprise evaporating ends and condensing ends, and the condensing ends are formed in the air passage; the evaporating ends are formed in the flue gas passage; the evaporating ends absorb waste heat of flue gas in the flue gas passage, and the heat is transferred to air in the air passage through the condensing ends; and the preheated air enters a boiler furnace for combustion supporting, and flow uniformizing pipes are arranged between the at least two adjacent heat pipes. According to the power plant boiler flue gas waste heat utilization system,a waste heat utilization device with a novel type structure is provided, and by arranging the flow sharing pipes between the heat pipes, evenness of the pressure, even distribution of the fluid flow and even distribution of fluid moving resistance in all the heat pipes are guaranteed.

The invention provides municipal full-automatic negative-pressure-free water supply equipment convenient to overhaul, and belongs to the technical field of water supply. The municipal full-automatic negative-pressure-free water supply equipment comprises a water storage mechanism, a pressure-stabilizing water supply mechanism is fixedly installed at one end of the water storage mechanism, a filtering mechanism is fixedly installed in the middle of the pressure-stabilizing water supply mechanism, and a water body flow stabilizing mechanism is fixedly installed on the side face of the filteringmechanism; and the water storage mechanism comprises a supporting bottom plate used for supporting and installing the water tank, a plurality of water tank supporting brackets are fixedly installed onthe surface of the top of the supporting bottom plate, square water storage tanks are fixedly installed among the multiple water tank supporting brackets, and round open grooves are formed in the middles of the top ends of the water storage tanks. According to the municipal full-automatic negative-pressure-free water supply equipment, the water tank is conveniently supported and fixed through thewater storage mechanism, the supporting bottom plate and the water tank supporting brackets, ozone arranged at the end of the piece is conveniently injected into the water storage tanks through ozonegenerators arranged in the water tank supporting brackets, and convenient disinfection sterilization treatment is conveniently achieved through the ozone generators.

The invention provides a steam boiler which comprises an upper boiler barrel, a lower boiler barrel, ascending pipes and descending pipes; the ascending pipes and the descending pipes are connected between the upper boiler barrel and the lower boiler barrel; flow stabilization devices are arranged in the ascending pipes; each flow stabilization device comprises a core body axially arranged the center of the corresponding ascending pipe and a plurality of radial rods extending along the center rod to the radial directions; a plurality of fins extending from the radial rod downwards are arrangedon each radial rod; the fins are provided with sharp parts; and the sharp parts face downwards. With the adoption of the novel structure steam boiler with the flow stabilization devices, when gas-liquid two-phase flowing exists in the ascending pipes, heat transfer is improved, vibration of the ascending pipes is weakened, and the level of noise is lowered.

The invention provides a power station boiler waste heat utilization system capable of intelligently controlling and utilizing waste heat. The system comprises an air preheater and a heat accumulator,the system further comprises a central controller. The central controller is in data connection with an air preheater valve and a heat accumulator valve, a third temperature sensor is arranged at theposition of a flue gas inlet of the air preheater, and the central controller automatically controls the valve opening of the air preheater valve and the valve opening of the heat accumulator valve according to the temperature detected by the third temperature sensor. Through the operation, when the temperature of flue gas is high and the generation requirement of preheated air is met, redundantheat is stored through the heat accumulator, and when the temperature of the flue gas is low, more flue gas can enter the air preheater to be used for preheating the air, so that the requirement of the preheated air is met, and meanwhile, energy is saved.

The invention provides a gas-liquid two-phase flow multitube type tubular heat exchanger. The gas-liquid two-phase flow multitube type tubular heat exchanger comprises a shell. The two ends of the shell are each provided with an end enclosure. The connection position of each end enclosure and the shell is provided with a tube plate. Each heat exchange tube is connected with the tube plates at thetwo ends. A gas phase in gas-liquid two-phase flow is insoluble or indissolvable gas, and in other words, in the heat exchange process, the gas is not dissolved into liquid. The gas-liquid two-phase flow multitube type tubular heat exchanger is characterized in that the heat exchange tubes are internally provided with the flow stabilizing devices used for absorbing shock and reducing noise; each heat exchange tube is internally provided with the multiple flow stabilizing devices; and the lengths of the flow stabilizing devices are reduced to a certain position gradually in the flowing direction of fluid inside the heat exchange tubes in the first place, and then the lengths of the flow stabilizing devices are gradually increased from the certain position. According to the gas-liquid two-phase flow multitube type tubular heat exchanger, the lengths of the flow stabilizing devices are variable; when the gas-liquid two-phase flow exists in a pipe, vibration of the pipe is weakened to a greatest extent, and the noise level is lowered; and meanwhile, flow resistance is reduced.

The invention provides a length-changing non-condensable gas porous flow stabilizer heat exchanger which comprises a shell. Sealing heads are arranged at the two ends of the shell correspondingly. A pipe plate is arranged at the connecting position of each sealing head and the shell. Heat exchange pipes are connected with the pipe plates at the two ends. A gas phase in gas-liquid two-phase flow isinsoluble or indissolvable gas, that is, gas cannot be dissolved in liquid in the heat exchange process. Flow stabilizers used for vibration reduction and noise reduction are arranged in each heat exchange pipe. The corresponding multiple flow stabilizers are arranged in the same heat exchange pipe. In the flowing direction of fluid in the heat exchange pipes, the lengths of the flow stabilizersare gradually decreased to a certain position, and then the lengths of the flow stabilizers are gradually increased from a certain position. According to the length-changing non-condensable gas porousflow stabilizer heat exchanger, through length changing of the flow stabilizers, when gas-liquid two-phase flowing exists in a pipeline, pipeline vibration is weakened to the largest degree, the noise level is reduced, and meanwhile flowing resistance is reduced.

The invention provides a steam heat exchanger. The steam heat exchanger comprises a header and a steam pipe; steady flow devices are arranged inside the steam pipe and are each of a sheet structure; the sheet structures are arranged on the cross section of the steam pipe; the steady flow devices are composed of square through holes and right octagon through holes; the length of each side of the square through holes is equal to the length of each side of the right octagon through holes; the four sides of each square through hole are the sides of four different right octagon through holes; and the four spaced sides of each right octagon through hole are the sides of four different square through holes. Compared with a steady flow device in the prior art, the steam heat exchanger with the steady flow structures further improves the steady flow effect, enhances heat transfer and is easy to manufacture.

The invention provides a liquid-vapor two-phase flow tubular shell type heat exchanger. The heat exchanger comprises a shell, wherein the two ends of the shell are separately provided with end sockets, tube plates are arranged at the connecting positions of the end sockets and the shell, and heat exchange pipes are connected with the tube plates at the two ends; a vapor phase in liquid-vapor two-phase flow can be condensed into a liquid phase in the heat exchange process, and the liquid-vapor two-phase flow flows in a tube pass; and flow stabilizing devices used for reducing vibration and noise are arranged in the heat exchange pipes, a plurality of flow stabilizing devices are arranged in the same heat exchange pipe, and the length of the flow stabilizing devices is gradually reduced in the flowing direction of fluid in the heat exchange pipes. According to the heat exchanger provided by the invention, through the length variation of the flow stabilizing devices, when the liquid-vaportwo-phase flow occurs in the pipeline, the vibration of the pipeline is reduced to an utmost degree, and the noise level is reduced; and at the same time, flow resistance is reduced, and the heat exchange uniformity is improved.

The invention provides a design method for a steam boiler. The steam boiler comprises an upper boiler cylinder, a lower boiler cylinder, an ascending pipe and a descending pipe, wherein the ascending pipe and the descending pipe are connected between the upper boiler cylinder and the lower boiler cylinder, and flow stabilizing devices are arranged in the ascending pipe. The design method comprises the following step that along with the increase of the pipe diameter of the ascending pipe, the distance between the adjacent flow stabilizing devices is continuously reduced. According to the provided design method for the steam boiler with the flow stabilizing devices with novel structures, the boiler which is designed by using the method has the advantages that when the steam and liquid two phases flow in the ascending pipe, the heat transfer is enhanced, meanwhile, the vibration of the ascending pipe is weakened, and the noise level is reduced.

The invention provides a steady flow evaporator. The steady flow evaporator comprises an inlet header, an outlet header, and a heat exchange component connected between the inlet header and the outletheader, wherein the inlet header and the outlet header are respectively connected with a steam inlet pipe and a condensate outlet pipe; the steam inlet pipe of the inlet header is internally providedwith a flow stabilizer, and the flow stabilizer has a sheet structure; the sheet structure is arranged on the cross section of the steam inlet pipe; the flow stabilizer is formed by a square structure and a regular octagonal structure, so that a square through hole and a regular octagonal through hole are formed. The flow stabilizer with the novel structure is adopted, namely, a flow stabilizer in a loop heat pipe is subjected to field transfer and is applied to an inlet pipe at an evaporation end of the loop heat pipe, so that a water hammer phenomenon caused by the space expansion when a steam-water mixture enters the inlet header can be reduced.

The invention discloses a composite continuous casting tundish flow stabilizing device and a using method thereof. The composite continuous casting tundish flow stabilizing device comprises a tundish and a steel ladle, wherein a discharge sleeve is fixedly connected to the interior of the steel ladle; a first through groove is formed in the discharge sleeve; sliding rails are symmetrically and fixedly connected to the bottom of the steel ladle; and a discharge pipe is connected to the interiors of the sliding rails in a sliding manner. The flow stabilizing device has the beneficial effects that: through the arrangement of a flow stabilizing base, a protruding block and a flow stabilizing groove, the impact force and the flow speed of molten steel are reduced, the effects of buffering and flow stabilizing of the molten steel flowing out of the steel ladle are achieved, and the flowing state of the molten steel is improved; through the arrangement of the discharge pipe and a first lead screw, the flow of the molten steel flowing out of the steel ladle is adjustable, and the flow can be blocked; through the arrangement of flow stabilizing columns, second lead screws and second threaded blocks, the flow of divided molten steel is adjustable; through the arrangement of first flow stabilizing plates and second flow stabilizing plates, the flowing rate of the molten steel is reduced, and the flow stabilizing effect is improved; and through the arrangement of a gas storage tank and a gas distributing pipe, an inert gas is filled, floating of impurities is facilitated, and the flowing condition of water flow is improved.