43results about How to "Play a central role" patented technology

The invention discloses a warehouse receipt pledge financing management system and method based on a block chain in the supply chain industry. A protocol layer, a data layer, a function layer and a service layer which are fully covered by a warehouse receipt pledge financing service system based on a block chain are designed. A practical Byzantine fault-tolerant node consensus mechanism, a data distributed evidence storage feature, an information transparency feature, a distributed operation and maintenance feature and the like adopted by a protocol layer based on a block chain are more convenient for big data structured analysis and processing, relatively accurate enterprise portraits are realized, and real-time data synchronization and data security are realized. Therefore, unified business decision optimization arrangement and risk control are facilitated, and convenience is provided for penetration type supervision. The system and the method can completely cover the links of warehouse receipt pledge article value dynamic evaluation, pledge release, credit extension and examination, financing subject credit risk control, penetration type supervision and the like, and avoid the problems of repeated warehouse receipt pledge, serious false warehouse receipt pledge phenomenon and low credit extension safety evaluation quality of financial institutions.

The invention provides a satellite temperature control method allowing rapid responding and multi-orbit adaption, wherein by adopting a heat pipe network, reinforcing contact thermal conduction, and spraying a high-emissivity thermal control coating inside a satellite to reinforce in-cabin thermal conduction and radiation heat exchange, a temperature field is distributed uniformly in a cabin; a whole satellite temperature level is adjusted by a compensative electric heater; a nightside of a side plate of the satellite is taken as a major heat dissipation face, the outer surface of the nightside is sprayed with a white paint, and all the other outer surfaces of the satellite body, except for the major heat dissipation face, are covered by multiple layers of thermal insulation assemblies; and components outside the satellite are sprayed with a white paint thermal control coating. A propelling cabin has independent design, wherein the entire outside of the cabin is covered by the multiple layers of the thermal insulation assemblies, a baseplate inside the cabin is covered by the multiple layers of the thermal insulation assemblies, and the propelling cabin is finally integrated with a platform cabin. By integral design of machinery, heat and electricity, the satellite temperature control method allowing the rapid responding and the multi-orbit adaption provided by the invention realizes thermal control requirements of the whole satellite under conditions of a sun-synchronous orbit and an inclined track by the temperature control method.

The invention provides a static cracking agent expansion pressure and temperature testing integrated device. The static cracking agent expansion pressure and temperature testing integrated device comprises supporting legs, a base, a hydraulic jack, a left stand column, a right stand column, a top seat, a guide rod, an upper fixing plate, an upper sealing piston, a pressure cell, a supporting limiting nut, a cylinder barrel and a pressure gauge; exhaust passages communicated with the interior of the cylinder barrel are arranged in the upper sealing piston and the upper fixing plate, sealing bolts are arranged at the outer ports of the exhaust passages, a mounting hole is formed in the side part of the cylinder barrel in a radial direction, and a thermometer is arranged in the mounting hole.The invention further discloses a testing method of the static cracking agent expansion pressure and temperature testing integrated device. The device can achieve the purpose of testing the expansionpressure and temperature in the hydration process of static cracking agents with different properties, is easy to carry, high in testing efficiency and testing speed and low in testing cost, can be used repeatedly, can be applied to different environments, and is suitable for testing the expansion pressure and temperature of the static cracking agents in different fast and common slow reactions.

The invention belongs to the field of coal mine mechanical equipment and particularly relates to a coarse coal slime sorting machine, which comprises an electric actuating mechanism. The electric actuating mechanism is sequentially connected with an adjustable feeding device and a cyclone interference device of a pipe structure. The cyclone interference device is arranged in a water tank and comprises a plurality of arc-shaped plates. A movable casing can be in close contact with the arc-shaped pates on the cyclone interference device during field installation to guarantee materials to fully flow along the direction of the arc-shaped plates. The cyclone interference device in the coarse coal slime sorting machine enables the materials to forcibly form rotational flow under the effect of the arc-shaped plates on the cyclone interference device to enable the materials to be evenly scattered, so that the sorting effect can be improved by approximate 10 percent. The coarse coal slime sorting machine can still reach a better scattering effect under the situation that the materials flow naturally, the feeding pressure is not required to be increased and the construction cost and the production process cost are reduced.

The invention discloses a prefabricated hollow plate mold. The prefabricated hollow plate mold comprises a bottom plate arranged on a base, side molds and an inner mold part, wherein the side molds and the inner mold part are arranged on the bottom plate; the bottom plate comprises a first bottom plate and a second bottom plate, wherein the first bottom plate and the second bottom plate are arranged in a laminated mode, and a welding hole formed in the second bottom plate is connected with the first bottom plate through plug welding; the plurality of side molds are arranged fixedly on the second bottom plate to form a pouring area on the second bottom plate in a surrounding mode; and the inner mold part is positioned in the pouring area, and the bottom of the inner mold part is fixed on the first bottom plate after passing through a positioning hole formed in the second bottom plate. The prefabricated hollow plate mold is formed by assembling the bottom plates, the side molds and the inner mold part, independent parts can adopt metal components, the manufacturing way of integral forming is not needed, the processing and manufacturing are easy, the structural strength is high, concrete with larger weight can be borne, the mold is not easy to compress or crush, a prefabricated hollow plate can slide out through disassembling the side molds, loosening the inner mold part, and inclining the bottom plates, the demolding is easy, and the processing speed is improved.

The invention relates to a stirring type cooking utensil which comprises a main machine shell, a motor assembled in the main machine shell and a container cup assembly detachably assembled on the mainmachine shell, the main machine shell comprises a main machine upper cover and a main machine base which are integrally installed, and installation positions are arranged at all corner ends of the main machine base respectively; the container cup assembly and the main machine shell are mutually locked / unlocked through a container cup fixing structure, the container cup assembly and the motor aremutually linked through an uncovering protection structure, a knife assembly in the container cup assembly and the motor are mutually linked through a knife assembly fixing structure, and a weighing foot assembly is installed on the installation positions in a suspended mode. Through the combined application of the container cup fixing structure, the uncovering protection structure, the knife assembly fixing structure and the weighing foot assembly, the weighing accuracy can be guaranteed, water overflowing of the whole machine is prevented, and the safety, stability and high controllability are achieved.

The invention discloses a pipe fitting pipe orifice shaping machine used for pipeline welding in the technical field of pipe orifice shaping machines. The pipe fitting pipe orifice shaping machine comprises a base, a gear is mounted at the power ends on the left sides of motors through a speed reducer, and the top of the gear is engaged with the bottom of a transmission gear. A pipe orifice shaping assembly is mounted at the top of a threaded adjusting rod through a bearing, limiting rods are arranged on the left side and the right side of the joint of the outer wall of the bottom of the pipeorifice shaping assembly and the threaded adjusting rod, and the bottoms of the limiting rods extend to the outer wall of the bottom of the base. After a pipe fitting is fixed, the threaded adjustingrod is rotated so that the pipe orifice shaping assembly can ascend, at this moment, a lower press roller and the outer wall of the bottom of the pipe fitting are located on the same horizontal line,then a lead screw is rotated so that a U-shaped moving seat can move towards the left side, at this moment, the outer wall of the bottom of the pipe fitting is located between an upper press roller and the lower press roller, a threaded rod is rotated again so that a moving plate can descend, at this moment the upper press roller abuts against the inner wall of the pipe fitting downwards, the motors drive the pipe fitting to rotate, and a pipe orifice can be shaped.

The invention belongs to the technical field of geological imaging systems, and discloses a geological survey hole imaging detection system, which comprises a lifting detection plate; a lifting driving mechanism, arranged in the lifting detection plate, and driving output ends extending out of the lifting detection plate being arranged on the two sides of the lifting driving mechanism respectively; lifting vertical frames, the number of the lifting vertical frames is two, and the two lifting vertical frames being located on the two sides of the lifting detection plate correspondingly, liftingmatching parts in transmission fit with the driving output ends being arranged on the inner sides of the lifting vertical frames in the height direction of the lifting vertical frames, and the liftingdetection plate can move up and down between the lifting vertical frames through transmission fit of the lifting matching parts and the lifting driving mechanisms; and a push rod, one end of the pushrod being connected to the bottom plate of the lifting detection plate through a rotating motor. The system has an ultrasonic imaging function and a drilling imaging function, two images can be collected and formed respectively, the geological structure in the tunnel can be known conveniently through the two images, and the system is more convenient to use.

The invention belongs to the field of medicines, and discloses a tea seed flavonoid aglycone and tea sapogenin zinc coordination complex, a method for preparing the same and application of the tea seed flavonoid aglycone and tea sapogenin zinc coordination complex. The method particularly includes steps of extracting degreased tea seed meal by the aid of ethyl alcohol aqueous solution to obtain extract liquid; filtering the extract liquid to obtain filter liquid; hydrolyzing the filter liquid by the aid of acid; concentrating the filter liquid to obtain concentrated liquid; precipitating the concentrated liquid to obtain precipitates; redissolving the precipitates by the aid of ethyl alcohol; adding anhydrous sodium carbonate and zinc salt into the precipitates; carrying out reflux reaction to obtain a product; regulating the pH (potential of hydrogen) of the product until the pH of the product reaches 8-10; allowing the product to stand still and precipitating the product; washing the product; drying the product under vacuum conditions to obtain the tea seed flavonoid aglycone and tea sapogenin zinc coordination complex. The tea seed flavonoid aglycone and tea sapogenin zinc coordination complex, the method and the application have the advantages that obvious effects of protecting nerve cells and preventing neurodegeneration can be realized by the tea seed flavonoid aglycone and tea sapogenin zinc coordination complex, and the tea seed flavonoid aglycone and tea sapogenin zinc coordination complex can be applied and developed as a novel medicine for resisting neurodegeneration diseases.

The invention relates to a kitchen appliance containing a cover closing safety protection linkage assembly and a control method of the kitchen appliance. The kitchen appliance comprises a mounting shell body, a main engine shell body internally provided with a switched reluctance motor, a handle shell, a control shell and a base, wherein the handle shell, the control shell and the base are fixedlyconnected to the two sides of the main engine shell body respectively; a shell bracket for assembling the mounting shell body is assembled at the upper end of the main engine shell body, a containerassembly is arranged on the mounting shell body, the container assembly comprises a heating container and a container cover buckled on the heating container, a container in-place detection structure is arranged among the container assembly, the mounting shell body and the shell bracket, the handle shell and the control shell are respectively provided with at least one cover closing safety protection linkage assembly; and the cover closing safety protection linkage assembly comprises at least one container cover locking structure and at least one cover closing in-place detection structure. According to the kitchen appliance and the control method in the invention, by using the container in-place detection structure, the cover closing in-place detection structure and the container cover locking structure in combination, cover closing safety is protected, the safety requirement is met, and the probability of occurrence of mechanical danger is greatly reduced.

The invention provides a lifting type rod piece separating mechanism comprising a successive dispatching mechanism and a screening mechanism. The successive dispatching mechanism comprises a first fixing frame, a first air cylinder, a rotating dispatching assembly, a first conveying mechanism and a control cabinet. The screening mechanism comprises a second fixing frame, a lifting mechanism, a removing assembly and a second conveying mechanism. The lifting mechanism comprises a lifting driving assembly, a sliding rail and a rising-falling frame. The removing assembly comprises a third fixing frame, a second air cylinder, a removing plate, a limiting sliding groove and a collecting groove. The first air cylinder, the first conveying mechanism, the lifting driving assembly, the second air cylinder and the second conveying mechanism are electrically connected with the control cabinet. According to the lifting type rod piece separating mechanism, a cylinder workpiece can be automatically distinguished and screened, the operation process is automatically completed, manual operation is reduced, and the screening accuracy is improved.

The invention discloses a medical waste liquid collecting device in the technical field of medical treatment. The medical waste liquid collecting device comprises a cylinder; a filter screen is movably arranged at the top of the inner cavity wall of the cylinder; an anti-splashing layer is arranged on the top side wall of a receiving hopper; a sleeve movably sleeves the middle of the outer side ofa support rod; a baffle plate is arranged on the right side wall of the sleeve; torsion springs movably sleeve the front and back sides of the outer side wall of the support rod; a measuring device is arranged on the right side wall of the cylinder; the device achieves a collecting effect on liquid by the receiving hopper during pouring of the liquid; the right end of the baffle plate is presseddown by the gravity of the liquid, so that the baffle plate is separated from the receiving hopper, and the liquid conveniently enters the bottom of an inner cavity of the cylinder; after the liquid is stopped from pouring, the torsion springs are expanded to drive rotation of the baffle plate, so that the right end of the baffle plate is hoisted up to bond with the bottom side wall of the receiving hopper, peculiar smell of the liquid in the inner cavity of the cylinder is prevented from dispersing, and an excellent protecting effect on the environment is achieved; and the liquid is conveniently poured in the inner cavity of the cylinder, so that workers have an excellent working mood.

The invention discloses an automatic milk making machine, and belongs to the field of the electromechanical technology. The automatic milk making machine comprises an electric kettle, a milk powder storage hopper, a water pump and various functional keys, wherein the electric kettle is located on the left side of the machine and is used for boiling water and keeping boiled water warm; the milk powder storage hopper is used for storing milk powder needing to be soaked; the water pump is connected with the electric kettle and is used for pumping the boiled water of the electric kettle into a feeding bottle; the keys can be used for setting the heat preservation temperature of the electric kettle, the automatic water pumping amount of the water pump and the weight of the milk powder flowing out from the milk powder storage hopper. The machine has the advantages of being low in manufacturing cost, easy to operate and capable of automatically making milk at any time according to the milk making amount and the milk making temperature set by a user.

The invention discloses a preparation method of an iron-cerium-based porous catalyst used for removing organic sulfur and belongs to the field of atmospheric pollution control. According to the method, ferric nitrate and cerium nitrate are mixed and dissolved according to a certain proportion, then, a certain amount of MOF material is added and stirred, a mixture is placed in a drying oven to be dried, finally the dried mixture is placed in a tube furnace to be subjected to oxygen-enriched roasting, and then the iron-cerium-based porous catalyst is obtained. The catalyst is used for catalytic removing of the organic sulfur in industrial flue gas, the method is simple in process, convenient and fast to operate, and capable of continuously running, the organic sulfur in the flue gas is removed and subjected to resource utilization in the purification process, and a product is clean and free of secondary pollution.

The invention discloses an anchor rod construction device for building engineering. The device includes an anchor head, a first hollow rod, positioning fastening bodies, a second hollow rod, a backingplate, pressure plates, elastic control main bodies and a gate valve; the first hollow rod is connected to the second hollow rod through a sleeve; the middle position of the sleeve is provided with apour plug port; the pour plug port is provided with the gate valve; the gate valve is connected to the elastic control main bodies; one ends of the elastic control main bodies are connected to the pressure plates; the two sides of the sleeve are welded with the positioning fastening bodies; the end, away from the sleeve, of the first hollow rod is connected to the anchor head; the end, away fromthe sleeve, of the second hollow rod is connected to a slurry stopping plug; the outer end of the slurry stopping plug is connected to the backing plate; one end faces of the positioning fastening bodies are connected to the backing plate through elastic control connecting rods; the elastic control connecting rods pass through the backing plate; and the surfaces of the elastic control connecting rods are provided with elastic control switches. Through the arrangement of the sleeve and the positioning fastening bodies, the device can have functions of balancing a middle end and strengthening the bearing capacity of rock mass.

The invention relates to a while-drilling measuring instrument self-locking device and method. According to the technical scheme, the while-drilling measuring instrument self-locking device comprisesa self-locking mechanism and an instrument connector, an outer cylinder is arranged on the outer side of a salvage head, three slip grooves are evenly distributed on the outer cylinder in the circumferential direction, slips are placed in the slip grooves, a bevel body is arranged in the outer cylinder, and the bevel body is connected to the lower portion of the salvage head in a threaded mode, and the upper portion of the bevel body is connected to the lower portions of the slips. A locking spring is arranged at the upper end of the bevel body, the instrument connector is arranged on the lower portion of the outer cylinder, small springs are installed on a shell of the instrument connector in a sleeving mode, loose pulleys are arranged on the lower portion of the small springs, semicircleclamping clacks are arranged on the lower portion of the loose pulleys, and a ten-core seat assembly is arranged in the shell of the instrument connector. The while-drilling measuring instrument self-locking device and method has the beneficial effects that the while-drilling measuring instrument self-locking device and method can prevent the instrument from bonding-off when drilling down, a one-way valve is no longer used, the cost and trouble are reduced, the instrument is prevented from falling into a well, the instrument is protected, and the safety is improved; a centralizer is equivalent to a durable measuring instrument centralizer assembly; and the instrument is salvageable.

The invention relates to a thread seal tape winder, in particular to a water pipe threaded opening thread seal tape winder for road construction. With the water pipe threaded opening thread seal tapewinder for road construction of the invention adopted, winding thickness can be guaranteed, the connection of water pipes can be facilitated, and the sealing performance of the water pipes will not beinfluenced. The water pipe threaded opening thread seal tape winder for road construction comprises a handle, a protective cover and the like, wherein the handle is connected with the protective cover. According to the water pipe threaded opening thread seal tape winder for road construction of the invention, the working time of a rotating mechanism can be set according to the diameter of a waterpipe through a setting key, a one-plus key, a one-minus key and a confirmation key, and therefore, winding thickness can be guaranteed, the connection of water pipes can be facilitated, the sealing performance of the water pipes is not affected; and a centering assembly can play a role in centering, so that the device of the invention can be fixed, and therefore, a thread seal tape can be wound more orderly.

The invention discloses a high-precision butterfly valve body and valve plate sealing face machining device which comprises a base, a workbench and a mounting frame fixedly connected to the front face and the back face of the base, and the workbench is rotationally connected with the base through a thrust ball bearing. According to the device, the main shaft and the workbench are fixed, the vertical shaft frame and the upper center are also fixed, no gap exists between the vertical shaft frame and the upper center, the inclination disc tool is fixed to the center shaft, a workpiece to be machined is fixed to the inclination disc tool, no gap exists obviously, and the rubber pad bears the weight of the workpiece to be machined; meanwhile, the center shaft has the aligning and centering effects, the whole tool part tightly floats on the workbench, the workbench rotates to drive the inclination disc tool and the workpiece to be machined to rotate so as to complete machining of the workpiece, in this way, deviation in the workpiece machining process can be effectively reduced, the sealing effect is more ideal in the pressure testing process after the workpiece is assembled, and the machining efficiency is improved. And the leakage problem is reduced.

The present invention discloses a full-automatic traction machine for wide and thick plate production in a steel mill. The full-automatic traction machine includes a working frame, two traction assemblies and cleaning assemblies, wherein the two traction assemblies are symmetrically mounted up and down in the middle of the working frame, so that a steel plate may pass through a space between the two traction assemblies; the upper end of the upper traction assembly is fixed to a hanging plate through a partition plate arranged in a bilateral symmetry mode, and the left and right ends of the hanging plate are slidably arranged on the side wall of the working frame and are driven by an air cylinder mounted on the top wall of the working frame to slide. The cleaning assemblies are arranged on the sides, away from the steel plate, of the traction assemblies; a limiting guide assembly and a thickness pre-detection device are arranged at the inlet end at the left side of the working frame. The lower end surface of the inlet end is flush with the upper end surface of a conveying belt arranged at the left side of the working frame so that the steel plate on the conveying belt may enter the device from the inlet end at the left side of the working frame to complete traction.

The invention relates to a ceramic glazing device, in particular to a ceramic spraying type uniform glazing device, and solves the problems that existing ceramic glazing equipment is uneven in glazingand cannot meet the glazing requirements of ceramics of different specifications. The ceramic spraying type uniform glazing device comprises a base, a base plate, a mounting plate, a servo motor, a mounting frame, a placing plate, a lifting assembly, a clamping assembly, a rotating assembly and the like, wherein the base plate is fixedly arranged at one end of the base, the mounting plate is fixedly arranged on the upper side surface of one end of the base plate, a sliding hole is formed in the mounting plate, the servo motor is fixedly arranged on one side surface of the mounting plate, themounting frame is fixedly arranged on one side surface of the base plate, and the placing plate is rotatably arranged on the mounting frame. According to the ceramic spraying type uniform glazing device, the clamping assembly and a positioning assembly can be driven to move up and down through cooperative work of the lifting assembly and an adjusting assembly, so that a spraying pipe can comprehensively and uniformly spray pigment and glaze to the outer wall of ceramic for glazing operation.

The invention relates to the technical field of watch manufacturing equipment, in particular to a watch cover precise positioning clamp. The watch cover precise positioning clamp comprises a base, a supporting head, a positioning structure, a locking structure and an external expansion ejector core. The base is provided with a mounting hole, the supporting head is provided with an elastic supporting-open part used for fixing a watch shell and a conical ejector hole used for supporting open the elastic supporting-open part, the positioning structure is used for limiting the horizontal positionof the supporting head, the locking structure is used for locking the supporting head in the mounting hole, the external expansion ejector core is located in the mounting hole and can be ejected our or retracted relative to the mounting hole, the top of the external expansion ejector core is in a conical shape with the small upper and the large lower, the conical shape corresponds to the conical ejector hole, the driving structure is connected with the external expansion ejector core so as to drive the external expansion ejector core to eject out of and stretch into the conical ejector hole soas to support the elastic supporting-open part open. According to the watch cover precise positioning clamp, the watch cover precise positioning clamp is used for watch shell positioning machining, dismounting and mounting are convenient and rapid, horizontal and vertical positions of the supporting head can be rapidly, accurately and repeatedly positioned, the watch shell can be accurately positioned, and machining precision of the watch shell can be ensured.

The invention discloses a post-tensioning method up-lift pile used in combination with pile body post-grouting and a construction method of the up-lift pile. The up-lift pile comprises an up-lift pilebody, a grouting pipe pre-buried in the length direction of the up-lift pile body and reinforcing ribs; cement slurry columns are poured in the grouting pipe; pre-stress ribs are inserted and connected in the grouting pipe; each pre-stress rib comprises an anchoring segment inserted and connected in the corresponding cement slurry column and a free segment located on the upper side of the corresponding cement slurry column; and the upper end position of the up-lift pile body is provided with locking assemblies for locking the pre-stress ribs. The construction method includes the following construction steps that firstly, the anti-lift pile is made, the grouting pipe is pre-buried, and grouting of the pile body is completed; secondly, the pre-stress ribs are sleeved with slurry isolating plugs; thirdly, the pre-stress ribs are implanted along the grouting pipe; and fourthly, pre-stress is applied to the pres-stress ribs and locking is performed. Pre-stress is provided for the anti-liftpile body, the normal tensile stress of the up-lift pile body is reduced, the number of the reinforcing ribs for use can be lowered for the up-lift pile body with the crack resisting requirement, andthe engineering cost is lowered.

The invention discloses a detachable pipeline connector structure capable of adapting to geological sedimentation. The detachable pipeline connector structure comprises a bell mouth pipe body, a spigot pipe body and a sealing ring. A bell mouth section is arranged at the right end of the bell mouth pipe body. A first flat wall section, a bell mouth connecting section and a second flat wall sectionare arranged on the inner wall of the bell mouth section. An internal thread is arranged on the bell mouth connecting section. The left end of the spigot pipe body is provided with a spigot section capable of being inserted into an inner hole of the bell mouth section. The outer wall of the spigot section is provided with a third flat wall section, a spigot connecting section and a fourth flat wall section. The spigot connecting section is provided with an external thread. The external thread is engaged with the internal thread. A gap is reserved between the left side face of the external thread and the right side face of the internal thread. The right side face of the external thread is closely attached to the left side face of the internal thread. The structure can release stress on a connector during geological sedimentation, and is long in service life, excellent in sealing performance, high in axial connecting strength and capable of being disassembled.

The invention relates to a raw material belt coiler, in particular to a raw material belt coiler with a threaded port of a water pipe for road construction. The technical problem to be solved is how to provide a raw material tape coiler for road construction water pipe threaded openings that can ensure the thickness of the winding, facilitate the connection of the water pipes, and not affect the tightness of the water pipes. The utility model relates to a raw material belt coiler with threaded mouth of a water pipe for road construction, which includes a handle, a protective cover, and the like; the protective cover is connected to the handle. The present invention can set the working time of the rotating mechanism according to the diameter of the water pipe by setting the key, adding a key, subtracting a key and confirming the key, so that the thickness of the winding can be ensured, and the connection of the water pipe can be facilitated without affecting the tightness of the water pipe. The centering component can play a centering role, and the device can be fixed, so that the raw material belt can be wound more neatly.

The invention discloses a cleaning method for bacterial sludge breeding on the inner wall of the water inlet pipe of an NF / RO membrane unit, comprising the following steps: emptying the residual sewage in the water inlet pipe, cleaning the inner wall of the water inlet pipe with water, until the water quality of the eluate is The chromaticity is less than 10 times; the inner wall of the water inlet pipe and the NF / RO membrane unit are circularly cleaned with sodium bisulfite solution, so that the NF / RO membrane elements are soaked in the sodium bisulfite solution; the inner wall of the water inlet pipe is cleaned with cleaning agents Carry out soaking; wash the inner wall of the water inlet pipe with water; use neutralizing agents to circularly clean the inner wall of the water inlet pipe, and complete the cleaning of the bacterial sludge on the inner wall of the water inlet pipe of the NF / RO membrane unit. The cleaning method of the present invention can effectively remove the bacterial sludge grown on the inner wall of the water inlet pipe, has the advantages of simple process, easy operation, low treatment cost, high cleaning efficiency, good cleaning effect, etc., can meet the actual treatment needs, and has good advantages Application value and application prospect.

The invention discloses a preparation method of an iron-cerium-based porous catalyst used for removing organic sulfur and belongs to the field of atmospheric pollution control. According to the method, ferric nitrate and cerium nitrate are mixed and dissolved according to a certain proportion, then, a certain amount of MOF material is added and stirred, a mixture is placed in a drying oven to be dried, finally the dried mixture is placed in a tube furnace to be subjected to oxygen-enriched roasting, and then the iron-cerium-based porous catalyst is obtained. The catalyst is used for catalytic removing of the organic sulfur in industrial flue gas, the method is simple in process, convenient and fast to operate, and capable of continuously running, the organic sulfur in the flue gas is removed and subjected to resource utilization in the purification process, and a product is clean and free of secondary pollution.