38results about How to "Eliminate flow dead zones" patented technology

The invention relates to a slurry bed loop reactor, application and a method for producing hydrogen peroxide. The slurry bed loop reactor comprises a riser, a separation tank and a downcomer which are communicated sequentially, wherein an expansion section with expanded pipe diameter is arranged at the upper part of the riser, the upper part of the expansion section is communicated with the separation tank, a liquid phase outlet in the upper part of the separation tank is communicated with the upper part of the downcomer, the bottom of the downcomer is communicated with the bottom of the riser, and the bottom of the separation tank is communicated with the lower part of the downcomer; and a raw material inlet is formed in the bottom of the riser, gas outlets are formed in the top of the expansion section of the riser and in the top of the separation tank, a filtration component is arranged in the downcomer and a clear liquid outlet is formed in the upper part of the downcomer via the filtration component. According to a hydrogenation method for producing hydrogen peroxide by an anthraquinone method with the adoption of the slurry bed loop reactor, the gas-liquid-solid three-phase separation efficiency is high, the excess local liquid holdup of a catalyst is avoided, the possibility of excessive hydrogenation is reduced, the hydrogenation efficiency is further effectively improved and a hydrogen peroxide product with relatively high concentration can be obtained.

The invention provides a shell-and-tube heat exchanger of a fractal structure. The shell-and-tube heat exchanger comprises a shell, a shell pass fluid inlet, a shell pass fluid outlet and a heat exchange tube bundle. Both the shell pass fluid inlet and the shell pass fluid outlet are communicated with the interior of the shell. The heat exchange tube bundle is located in the shell and is of a deoxyribose nucleic acid (DNA) type multi-spiral structure. The whole heat exchange tube bundle is of the DNA molecule spiral structure and can effectively guide shell pass fluid to flow along a spiral path. The field synergy of a shell pass is enhanced under the circumstance that pressure drop loss is little, and a flowing dead zone of the shell pass is eliminated.

The invention relates to the field of molten steel continuous casting, in particular to a submersed nozzle for slab continuous casting. A pair of discharge holes (3) are eccentrically formed in the two sides of a central line at the bottom of a nozzle body respectively; one discharge hole is close to the inner wall on one side at the bottom of the nozzle body; and the other discharge hole is close to the inner wall on the other side of a diagonal line at the bottom of the nozzle body. According to the submersed nozzle, the pair of eccentric discharge holes can form a mixing flow field in a crystallizer in the casting process, so that a good effect of reducing subsurface inclusions and air bubbles can be obtained, a flowing dead zone is removed at the same time, the molten steel temperature is uniform, and casting powder is conveniently molten and uniformly flows into the crystallizer, thereby improving the slab surface quality; and compared with electromagnetic mixing equipment, the investment cost can be greatly reduced, the slab continuous casting operation is also easily carried out on the conventional casting machine at the same time, the crystallizer of the continuous casting machine does not need to be complicatedly improved, the improvement and usage costs are very low, the energy is saved, the environment is protected, and the value in popularization and application is wide.

The invention relates to an improved rotating disc tower internal component suitable for solid-containing extraction operation. The component comprises rotating discs and fixed rings, and the rotating discs and the fixed rings are in an arc-shaped design. The radian on the fixed rings and the radian on the rotating discs are matched with eddies formed by multiphase fluid of materials in a tower. According to the improved rotating disc tower internal component suitable for solid-containing extraction operation, fixed rings and rotating discs of a traditional rotating disc tower are improved, the arc-shaped interface design structure is adopted, the multiphase flow field structure in the rotating disc tower can be well matched with the geometrical interface of the tower, flowing dead areas in the tower are eliminated, hence, the turbulence characteristic in the tower can be fully utilized, solid phase deposition is prevented, and the processing capacity of the rotating disc tower to a solid-containing extraction system is improved.

The invention relates to a self-supporting type tube bundle heat exchanger. The self-supporting type tube bundle heat exchanger includes a tubular heat exchanger. Heat exchange tube bundles in the tubular heat exchanger are mutually supported through fixing sleeves installed outside single heat exchange tubes in a sleeving mode, and the heat exchange tube bundles are supported and fixed through supporting plates in the circumferential direction. The fixing sleeves press grooves to be closely connected with the heat exchange tubes. Compared with the prior art, the self-supporting type tube bundle heat exchanger has the advantages that media in a shell side form complex, continuous and uniform flow passages between the heat exchange tubes, the turbulence degree of the media is increased, a flowing boundary layer is thinned, heat transfer resistance is reduced, and therefore heat exchange efficiency is improved; the equipment is small in size, and the manufacturing cost is low; no baffle plate is arranged in the shell side, so that flowing dead zones in the shell side are eliminated, and the pressure drop of the media in the shell side is lowered; as no blind zone exists in the shell side, scaling is not prone to occur; the flow velocity is high in the shell side, so accumulation of impurities in the media is lowered; because large-area through holes are formed in a hole plate, compared with a traditional baffle plate, the heat exchange tubes are quite convenient to assemble and disassemble.

The invention discloses a catalytic conversion stripper used in catalytic conversion devices in petroleum refining and petrochemical industries, in order to solve the problem of low stripping efficiency existing in the existing catalytic conversion strippers. In the stripper of the present invention, each set of stripping baffles is composed of a stacked inner ring stripping baffle (2) and a stacked outer ring stripping baffle (3) below it. The stacked inner ring stripping baffle (2) is composed of at least 2 single-layer inner ring stripping baffles, and the stacked outer ring stripping baffle (3) is composed of at least 2 single-layer outer ring stripping baffles. Between the upper single-layer inner-ring stripping baffle and the next single-layer inner-ring stripping baffle and between the upper single-layer outer-ring stripping baffle and the next single-layer outer-ring stripping baffle Horizontal channels (5) are formed between them. The stripper of the invention is suitable for the stripping of ungenerated catalysts entrained with oil and gas and the stripping of regenerated catalysts entrained with gas impurities in various catalytic conversion processes.

The invention relates to the field of flow cells, particularly relates to a flow cell stack assembly structure. The flow cell stack assembly structure comprises a sheet porous electrode and a liquid flow frame provided with a through hole with the shape and the size corresponding to those of the liquid flow frame; the porous electrode is arranged in the middle through hole of the liquid flow frame; the peripheral edges of the porous electrode are attached to the inner wall surface of the middle through hole of the liquid flow frame; a through hole serving as an electrolyte inflow channel and athrough hole serving as an electrolyte outflow channel are formed in the liquid flow frame; the through hole of the electrolyte inflow channel communicates with the middle through hole through a groove or a through hole serving as an inlet flow guide area, and the through hole of the electrolyte outflow channel communicates with the middle through hole through a groove or a through hole serving as an outlet flow guide area. The flow cell stack assembly structure is characterized in that a cavity for buffering and redistributing the electrolyte is formed near the inner wall surface of the liquid flow frame at the middle through hole where the inlet flow guide area and the outlet flow guide area are located; and the inlet or outlet flow guide area communicates with the middle through hole through the cavity.

The invention relates to a self-supported type corrugated straight heat exchange tube bundle which comprises a plurality of heat exchange tubes, wherein the heat exchange tubes are arranged in parallel; each heat exchange tube consists of a corrugated straight tube and a smooth straight tube; the main body of the corrugated straight tube is of a structure of a corrugated straight tube section and a straight tube section, that is, one waveform of a period comprises a wave peak, a straight tube, a wave peak and a wave trough; the smooth straight tubes are arranged at two ends of the corrugated straight tubes and are fixedly connected with a tube plate in a heat exchanger; the heat exchange tubes are self-supported through linear contact of the straight tube sections. By adopting the self-supported type corrugated straight heat exchange tube bundle, the heat exchange efficiency of the heat exchanger can be effectively improved, generation of dirt can be inhibited, abrasion of baffle plates can be avoided, and in addition, the self-supported type corrugated straight heat exchange tube bundle has the advantages of convenience in disassembling, equipment size reduction, low manufacturing cost and the like.

The invention relates to an improved rotating disc tower internal component suitable for solid-containing extraction operation. The component comprises rotating discs and fixed rings, and the rotating discs and the fixed rings are in an arc-shaped design. The radian on the fixed rings and the radian on the rotating discs are matched with eddies formed by multiphase fluid of materials in a tower. According to the improved rotating disc tower internal component suitable for solid-containing extraction operation, fixed rings and rotating discs of a traditional rotating disc tower are improved, the arc-shaped interface design structure is adopted, the multiphase flow field structure in the rotating disc tower can be well matched with the geometrical interface of the tower, flowing dead areas in the tower are eliminated, hence, the turbulence characteristic in the tower can be fully utilized, solid phase deposition is prevented, and the processing capacity of the rotating disc tower to a solid-containing extraction system is improved.

The invention discloses a spiral traverse baffle supporting dimple tube bundle heat exchanger which comprises: a front tube case and a back tube case which are arranged at two sides of a shell, a tube case clapboard which is arranged in the front tube case, a tube side inlet and a tube side outlet which are respectively arranged at the upper side and the lower side of the tube case clapboard, a shell side inlet and a shell side outlet which are respectively arrange at the upper side and the lower side of the shell, a dimpled surface enhancing heat exchange tube bundle which is arranged in the shell, has two ends respectively fixed on a front tube plate and a back tube plate and communicated with a tube side inlet and a tube side outlet which are arranged on the front tube case, and is also provided with a plurality groups of spiral traverse baffles. The heat exchanger shell sides adopts the dimpled surface enhancing heat exchange tube, the turbulivity of the shell sides fluid is enhanced effectively and the shell sides heat exchange is further enhanced; the shell sides adopts the spiral traverse baffles as supporting structure, resistance loss of the shell sides is greatly reduced. The invention is characterized by high efficiency of heat exchange, small resistance loss of the shell sides flowing, compact structure, small occupied area, long service life and uneasy deposition.

The invention relates to a high-temperature fire tube type waste heat boiler tube plate cooling room. The high-temperature fire tube type waste heat boiler tube plate cooling room comprises four parts including a cooling room tube plate, a synthetic air tube flexible tube plate, a synthetic air tube and a cooling water tube. The cooling room is enclosed space formed by the cooling room tube plate and the synthetic air tube flexible tube plate, the synthetic air tube penetrates through the whole cooling room through the flexible tube plate and the cooling room tube plate, and the cooling water tube is connected into the cooling room through the cooling room tube plate. The cooling room is in a certain height, therefore, the uniform distribution of the cooling water nearby the flexible tube plate is guaranteed, and the situation that the flexible tube plate is overheated caused by the less local cooling water distribution is avoided. The cooling water enters the cooling room from the cooling water tube to flow out through the end outlet of the cooling water tube, and functions of the intensification of flowing nearby the synthetic air tube and the elimination of flowing dead zones are achieved. An insulation casting tube is arranged in the synthetic air tube close to the inlet of the flexible tube plate, therefore, the local thermal resistance can be increased, the local heat transmission capacity can be reduced, and the thermal stress and the temperature nearby tube walls are reduced.

The invention relates to a loop reaction device in a slurry bed, application and a method for producing hydrogen peroxide. The loop reaction device comprises a slurry bed reactor and a solid-liquid separator, wherein the upper part of the slurry bed reactor is communicated with the upper part of the solid-liquid separator, and the bottom of the slurry bed reactor is communicated with the bottom of the solid-liquid separator; and a coaxial inner sleeve is arranged in the slurry bed reactor, an outer sleeve is arranged between the inner sleeve and the outer wall of the slurry bed reactor at the upper part of the slurry bed reactor, a raw material inlet and a fluid distributor are arranged in the inner sleeve and at the bottom, a gas outlet is formed in the top of the slurry bed reactor, a filtration component is arranged in the solid-liquid separator, and a clear liquid outlet is formed in the wall of the solid-liquid separator via the filtration component. According to a hydrogenation method for producing hydrogen peroxide by an anthraquinone method with the adoption of the slurry bed loop reactor, the gas-liquid-solid three-phase separation efficiency is high, the excess local liquid holdup of a catalyst is avoided, the possibility of excessive hydrogenation is reduced, the hydrogenation efficiency is further effectively improved and a hydrogen peroxide product with relatively high concentration can be obtained.

The invention relates to a tube bundle casing orifice plate supported heat exchanger, which includes a tube heat exchanger, and the heat exchange tube bundles in the tube heat exchanger are mutually supported by a fixed sleeve sleeved outside a single heat exchange tube. , the heat exchange tube bundle is supported and fixed circumferentially by the support plate. The pressing groove of the fixed sleeve is closely connected with the heat exchange tube. Compared with the prior art, the beneficial effects of the present invention are: 1) the medium in the shell side forms complex continuous and uniform flow passages between the heat exchange tubes, which improves the degree of turbulence and thins the boundary layer of the flow, The heat transfer resistance is reduced, thereby improving the heat exchange efficiency; 2) The equipment is small in size and low in manufacturing cost; 3) There is no baffle in the shell side, which eliminates the flow dead zone in the shell side and reduces the pressure of the shell side medium. Pressure drop: 4) There is no blind area in the shell side, and it is not easy to scale; the flow rate in the shell side is high, which reduces the accumulation of impurities in the medium: 5) Large-area through holes are set on the orifice plate. Compared with traditional baffles, The installation and disassembly of the heat exchange tube is very convenient.

The invention discloses a volute for a centrifugal fan. The volute comprises a front cover and a rear cover which are parallel to each other, and a ring wall connected between the front cover and the rear cover, wherein an air outlet is formed among the front cover, the rear cover and an annular wall, a plane which is perpendicular to the front cover and the rear cover, penetrates through the annular wall, and is parallel to the air outlet is used as a section, on the section, a molded line of the annular wall comprises two line segments connecting the corresponding end portions of a front cover type line and a rear cover type line, and the middles of the line segments are more protruded out of the volute relative to the two ends. The invention further discloses a centrifugal fan using the volute. Compared with the prior art, the volute has the advantages that the annular wall can meet the characteristics that the flow speed of an outlet of an impeller is large in the middle, and small on the two sides, the non-uniform impact of the outlet air flow to the annular wall is weakened, airflow turbulence caused by mutual interference among air flow is reduced, circulation flowing caused by mutual interference among the air flow is eliminated, vortexes are eliminated, the performance of the fan can be effectively improved, and pneumatic noise is reduced.

The invention discloses a low-noise shielded pump with an axial force balance pipe structure, which includes a rotor part, a circulation pipe, a balance pipe, and a partition plate. The rotor part passes through the pump body, the pump cover, the motor casing and passes Bearings are used for rotatable support, and the pump body, pump cover, and motor casing are fixed by fasteners. Through holes are opened on the rear wall of the motor casing and the side wall of the outlet end of the pump body, and are connected by circulation pipes. The rotor components include the main shaft, impeller and balance assembly. The main shaft is installed on the central axis of the pump body, pump cover and motor casing through bearing support. The impeller is installed on the main shaft and located in the pump body. The balance assembly is installed on the main shaft and located in the motor. In the casing, a stationary partition plate is installed in the motor casing. The partition disk and the balance assembly overlap in the axial direction of the main shaft and divide the motor casing into two areas, one of which is connected to the outlet of the pump body through a circulation pipe. The other area is connected to the inlet port of the pump body through the balance pipe.

The invention relates to a high-temperature fire tube type waste heat boiler tube plate cooling room. The high-temperature fire tube type waste heat boiler tube plate cooling room comprises four parts including a cooling room tube plate, a synthetic air tube flexible tube plate, a synthetic air tube and a cooling water tube. The cooling room is enclosed space formed by the cooling room tube plate and the synthetic air tube flexible tube plate, the synthetic air tube penetrates through the whole cooling room through the flexible tube plate and the cooling room tube plate, and the cooling water tube is connected into the cooling room through the cooling room tube plate. The cooling room is in a certain height, therefore, the uniform distribution of the cooling water nearby the flexible tube plate is guaranteed, and the situation that the flexible tube plate is overheated caused by the less local cooling water distribution is avoided. The cooling water enters the cooling room from the cooling water tube to flow out through the end outlet of the cooling water tube, and functions of the intensification of flowing nearby the synthetic air tube and the elimination of flowing dead zones are achieved. An insulation casting tube is arranged in the synthetic air tube close to the inlet of the flexible tube plate, therefore, the local thermal resistance can be increased, the local heat transmission capacity can be reduced, and the thermal stress and the temperature nearby tube walls are reduced.

The invention provides a shell-and-tube heat exchanger of a fractal structure. The shell-and-tube heat exchanger comprises a shell, a shell pass fluid inlet, a shell pass fluid outlet and a heat exchange tube bundle. Both the shell pass fluid inlet and the shell pass fluid outlet are communicated with the interior of the shell. The heat exchange tube bundle is located in the shell and is of a deoxyribose nucleic acid (DNA) type multi-spiral structure. The whole heat exchange tube bundle is of the DNA molecule spiral structure and can effectively guide shell pass fluid to flow along a spiral path. The field synergy of a shell pass is enhanced under the circumstance that pressure drop loss is little, and a flowing dead zone of the shell pass is eliminated.

The invention relates to a vertical storage tank leakage monitoring system with a dual-layer tank bottom plate structure. The provided system aims at realizing real-time monitoring of the leakage situation of a tank bottom plate of a vertical storage tank. The technical scheme is that the vertical storage tank leakage monitoring system with the dual-layer tank bottom plate structure comprises the vertical storage tank which consists of a tank body and a tank body, and a leakage monitoring system which is used for monitoring leaked gas. The vertical storage tank leakage monitoring system with the dual-layer tank bottom plate structure is characterized in that the tank bottom comprises an upper layer bottom plate, a lower layer bottom plate and a closed cavity which is arranged between the upper layer bottom plate and the lower layer bottom plate, the leakage monitoring system comprises a circulating pipeline which is provided with a circulating pump and is connected with the cavity, an inert gas source which is communicated with the circulating pipeline, and a PLC (programmable logic controller) control center which is respectively connected with an infrared gas transmitter, a pressure transmitter, a temperature and humidity transmitter and the circulating pump through data lines.

The invention relates to a slurry bed loop reactor, application and a method for producing hydrogen peroxide. The slurry bed loop reactor comprises a riser, a separation tank and a downcomer which are communicated sequentially, wherein an expansion section with expanded pipe diameter is arranged at the upper part of the riser, the upper part of the expansion section is communicated with the separation tank, a liquid phase outlet in the upper part of the separation tank is communicated with the upper part of the downcomer, the bottom of the downcomer is communicated with the bottom of the riser, and the bottom of the separation tank is communicated with the lower part of the downcomer; and a raw material inlet is formed in the bottom of the riser, gas outlets are formed in the top of the expansion section of the riser and in the top of the separation tank, a filtration component is arranged in the downcomer and a clear liquid outlet is formed in the upper part of the downcomer via the filtration component. According to a hydrogenation method for producing hydrogen peroxide by an anthraquinone method with the adoption of the slurry bed loop reactor, the gas-liquid-solid three-phase separation efficiency is high, the excess local liquid holdup of a catalyst is avoided, the possibility of excessive hydrogenation is reduced, the hydrogenation efficiency is further effectively improved and a hydrogen peroxide product with relatively high concentration can be obtained.