337results about How to "Prevent escape" patented technology

This utility model provides an insect branch-fixing survey and rearing observation box, relating to the technical field of insect observation devices, and is designed to solve the problem of easy damage to branches in existing insect survey techniques. The insect branch-fixing survey and rearing observation box includes a first half-box and a second half-box. The first half-box has a first upper half-hole and a first lower half-hole, and the second half-box has a second upper half-hole and a second lower half-hole. The first and second half-boxes are joined to form a receiving cavity. When the first and second half-boxes are joined, the first and second upper half-holes together form a first hole for the branch to pass through, and the first and second lower half-holes together form a second hole for the branch to pass through. The first and second holes are respectively sealed to the branch at different locations. Both the first and second half-boxes are made of transparent material, and at least one of the first and second half-boxes has a ventilation window with a detachable mesh screen. This utility model is less likely to damage branches.

The invention discloses a radioactive medical isotope Ra-223 stably-labeled rare earth nano diagnosis and treatment preparation as well as a preparation method and application thereof. According to the invention, by constructing a dual protection mechanism of the shell layer and the functional biomolecular layer, the Ra-223 is effectively packaged, the recoil nuclei of the Ra-223 are reserved at the tumor part and are prevented from escaping to the surrounding environment of the tumor, the safety of the Ra-223 treatment process can be enhanced, the radioactive energy is ensured to accurately act on the focus, and the treatment effect of the Ra-223 is improved. Meanwhile, the damage risk to healthy tissues is minimized.

The application provides a one-way sealing ring, a sealing mechanism, a tail pipe top packer and a tail pipe cementing process, wherein the one-way sealing mechanism comprises a center pipe, an upper deformed sleeve arranged on the outer wall of the center pipe, a lower deformed sleeve arranged on the outer wall of the center pipe, the upper deformed sleeve and the lower deformed sleeve being spaced apart in the axial direction, a sealing element arranged on the outer wall of the center pipe, the lower end of the sealing element being in abutment with the upper end of the lower deformed sleeve, an expansion cone arranged between the upper deformed sleeve and the sealing element, a sealing groove being arranged on the inner wall of the expansion cone in the circumferential direction, a sealing ring being arranged in the sealing groove, a flow-off groove being arranged on the inner wall of the expansion cone in the axial direction, the flow-off groove penetrating through the upper end and the lower end of the expansion cone, and fluid being allowed to flow only in one direction from the upper end of the expansion cone to the lower end of the expansion cone along the flow-off groove, while the fluid under the packer is allowed to flow upward, the wellhead annulus is allowed to be pressurized for cement setting, the pressure reduction caused by volume shrinkage is prevented to prevent the stratum fluid from flowing out, and the cementing quality is ensured.

The utility model relates to the field of red pepper production, in particular to a red pepper cutting device with a roller cutter cleaning function, which comprises a conveyor belt. The device comprises a conveyor belt and further comprises mounting seats, a polished rod, limiting plates, a scissor-type folding frame, a sliding frame, a first motor, a first lead screw, a sliding seat, a rotary shaft, a connecting column and fiber cloth, the mounting seats are mounted on the left side and the right side of the middle of the upper end of the conveyor belt, the polished rod is connected between the two mounting seats, and the four limiting plates are slidably connected to the outer surface of the polished rod; the first motor is arranged and drives the first lead screw to rotate, the sliding frame limits the sliding base to rotate so that the sliding base can move linearly, the leftmost limiting plate is driven to be linked with the other three limiting plates to be unfolded at equal intervals through the scissor-fork type folding frame, the connecting column moves along with the limiting plates to pull out fiber cloth, and the rotating shaft fixes and recycles the other end of the fiber cloth. A retractable blocking wall is formed to prevent the peppers from escaping from the gap between the conveying belt and the limiting plate, and automatic adjustment of the distance is achieved.

The invention relates to the technical field of chain skimming machines, and discloses a chain skimming machine for a rectangular pool, the chain skimming machine comprises a conveying mechanism and a skimming mechanism, the conveying mechanism is arranged on a sedimentation tank, the skimming mechanism is arranged on the conveying mechanism, the skimming mechanism comprises a conveying frame and a skimming plate, the conveying frame comprises a cross beam and a guide rod, and the skimming plate comprises a main plate and an auxiliary plate. The cross beam is horizontally arranged on the conveying mechanism, the guide rods are arranged at the ends of the cross beam respectively and are in sliding fit with the cross beam, and driving units for driving the guide rods to move are further arranged between the guide rods and the cross beam; the main plate is horizontally arranged on the cross beam, the auxiliary plate is arranged on the guide rod, the moving area of the auxiliary plate and the moving area of the main plate partially coincide, and the auxiliary plate is rotationally hinged to the guide rod and rotates around the vertical plane along with fluctuation of the inner wall of the sedimentation tank through the swing unit. When the gap between the skimming plate and the tank wall is too large, the auxiliary plate is close to the tank wall in a self-adaptive manner to make up the gap, so that the effect of cleaning the scum is achieved.

The invention relates to the field of material surface treatment and machining, in particular to a method and device for directly preparing a copper alloy coating on the surface of a titanium alloy sealing rod. The process comprises the steps that firstly, cleaning and metal powder drying treatment are conducted on a sealing rod base material, and the base material is clamped on a rotary bearing mechanism in an adjusting box body; sealing the adjusting box body and filling inert gas to replace air until the oxygen content reaches the standard; the laser cladding mechanism is controlled to conduct scanning preheating on the surface of the base material in a non-powder-feeding state; then a powder feeding function is started, spiral high-speed laser cladding is carried out in cooperation with rotation of the base material and axial feeding of the cladding assembly, and closed-loop adjustment of the protective gas flow is carried out in the cladding process; and after cladding is completed, the base material is transferred into the heating furnace body in the box body to be subjected to post-treatment slow cooling, laser scanning preheating and in-furnace slow cooling are combined, atmosphere closed-loop control in a closed environment is matched, and the effect of restraining cracking and oxidation of a titanium alloy cladding layer is achieved.

This invention discloses a passive adsorption-selective catalytic reduction (CCR) device for diesel vehicles, comprising an electronically controlled nozzle, a first mixing chamber, a pre-catalytic oxidation-reduction chamber, a second mixing chamber, and a post-catalytic oxidation-reduction chamber arranged sequentially. The first mixing chamber includes a first urea solution inlet, a V-shaped breaker wall, and a W-shaped bottom mixing chamber. The V-shaped breaker wall is fixed to the rear wall of the first urea solution inlet pipe. The W-shaped bottom mixing chamber includes an inner cavity and an outer cavity. The inner cavity wall has staggered array openings, and the inner and outer cavities are connected through these openings. A guide wall structure is connected to the outermost pipe at the end of the first mixing chamber. The CCR chamber is connected to the end of the guide wall, and a three-zone integrated catalyst is located inside the CCR chamber. This invention solves the problems of severe NOx escape during the cold start phase, system complexity, and low-temperature urea crystallization in existing selective catalytic reduction technologies.

The invention relates to a long-horned beetle natural enemy injection device and a using method thereof, and belongs to the technical field of long-horned beetle control, the long-horned beetle natural enemy injection device comprises a traction rod, a natural enemy storage pipe, a ventilation cover and filling glue, the ventilation cover detachably covers the open end of the natural enemy storage pipe, and the traction rod can movably penetrate through the connecting end of the natural enemy storage pipe; the traction rod is used for being inserted into a trunk boring hole and reserving a communication channel, the filling glue is arranged between the connecting end of the natural enemy storage pipe and the periphery of the trunk boring hole, and the filling glue is used for seamlessly sealing and bonding the traction rod, the connecting end of the natural enemy storage pipe and the periphery of the trunk boring hole. The long-horned beetle worm hole is positioned through the traction rod, a communication channel of the natural enemy and the worm hole is reserved, seamless sealing bonding of filling glue is matched, the natural enemy storage pipe and the worm hole are communicated to form a closed parasitic space, the search range of the natural enemy is greatly reduced, the natural enemy is forced to make contact with long-horned beetles in the worm hole, and therefore the parasitic efficiency and the prevention and control speed of the natural enemy are improved. The green prevention and control requirements of forest and fruit industries are met.

The utility model discloses a kind of pest trapping devices, it is related to pest control equipment technical field, including top cover, solar driving mechanism, base assembly, connecting arm, fixed clamp and capture assembly, solar driving mechanism is installed on top cover, base assembly is located below top cover, top cover is connected between base assembly by connecting arm, connecting arm is U-shaped structure, fixed clamp is installed on connecting arm, the pest trapping device is fixedly installed at specified capture site by fixed clamp, capture assembly is installed on the output end of solar driving mechanism, and rotate by solar driving mechanism drive, under the drive of solar driving mechanism, capture assembly makes circular motion around base assembly, base assembly includes pest collection box, pest collection box is communicated with capture assembly, pest attracted by base assembly is driven and guided to pest collection box by capture assembly and is captured and collected, the above driving principle is similar to full-automatic rotary fly trap.

The utility model relates to the technical field of acid gas treatment, in particular to a multi-stage treatment system for acid gas, which comprises a first-stage alkaline tower, a second-stage alkaline tower, a dehydration facility and an activated carbon adsorption facility which are connected in sequence, the device disclosed by the utility model has the beneficial effects that the two stages of alkaline washing towers are connected in series, so that the total gas-liquid contact area is increased, and the removal efficiency of acid gas is improved; through the dense design of nozzles on the periphery of the tower body, the liquid film coverage rate of the tower wall area is increased, gas escape is avoided, and the alkali washing efficiency is further improved; the Pall ring packing is made of CPVC materials, the corrosion resistance is better than that of traditional PP materials, the service life is prolonged, meanwhile, the packing layer is high in anti-blocking capacity, and the shutdown cleaning frequency is reduced.

The utility model provides a deep purification system for waste gas containing tobacco shred particles in a rolling and packaging dust removal room, which comprises a cyclone dust collector, a first centrifugal purification device and a second centrifugal purification device which are used for purifying the waste gas step by step, each of the first centrifugal purification device and the second centrifugal purification device comprises a water throwing nozzle for atomizing a liquid medium and a centrifugal impeller for gas-liquid separation, and the first centrifugal purification device is used for mixing waste gas with the atomized water medium and then performing gas-liquid separation to remove particles; and the second centrifugal purification device is used for mixing the waste gas with the atomized odor removal medium and then carrying out gas-liquid separation to remove odor. By means of the cyclone dust collector, the first centrifugal purification device and the second centrifugal purification device which are used for purifying waste gas step by step, step-by-step purification of particulate matter / dust and peculiar smell molecular substances in the waste gas is achieved, the waste gas can be efficiently purified, peculiar smell removing media can be saved, and the separated substances can be effectively classified and recycled.

This utility model discloses a fixed-point dust removal device for clean production of bauxite, relating to the field of dust removal technology in bauxite production. It includes a dust removal chamber with a collection chamber inside. Ventilation chambers and water storage chambers are respectively located on the left and right sides of the upper end of the collection chamber. The collection chamber, water storage chamber, and ventilation chamber are separated by partitions. A central shaft is installed at the front center of the dust removal chamber. Four side support plates are arranged in a circumferential array on the outer wall of the central shaft. A fixing ring plate is installed on the outside of the four side support plates, and a sealing plate is installed between adjacent side support plates. This utility model, through a series of structures, utilizes the triple action of wind, water cleaning, and mechanical scraping during dust removal to clean stubborn dust and impurities, while preventing dust from escaping during cleaning, thus efficiently cleaning dust in specific areas.

The utility model relates to a blow -fill -seal equipment technical field discloses a sterilization cup subassembly of blow -fill -seal equipment, sterilization cup main part has the accommodation cavity, and the needle is inserted into the accommodation cavity and goes down, and the adjusting mechanism includes adjusting lever, guide seat, guide block and adjusting lever fixed block and installs the sterilization cup mounting seat on the surface of sterilization cup main part. The sterilization cup subassembly of blow -fill -seal equipment moves through the setting adjusting lever and pushes the guide block, indirectly makes the up-and-down movement of sterilization cup main part, when the upward movement, the contact surface of compactor and extruder mould is compacted, forms the sealed environment, compares the operation of multiple jackscrews of current multiple jackscrews, is different from the multiple jackscrew scheme of conventional, adjusts the jackscrew one by one to realize the lifting of sterilization cup, here only needs to adjust an adjusting lever, can use the linear motion of guide block to realize the lifting of sterilization cup, and the operation is simple, and the stress is even.

The utility model discloses a coal gangue crushing and feeding device, which relates to the technical field of coal gangue crushing, and comprises a crushing cylinder, the top side of the crushing cylinder is in butt joint with a sleeve, the sleeve is connected to one end of the top side of a feeding box, the feeding box is obliquely arranged on one side of the crushing cylinder, and a plurality of supporting rollers are arranged in the feeding box. The top side supporting rollers are driven by a first motor and are in transmission connection with a conveying belt. According to the coal gangue crushing and feeding device, the supporting rollers in the feeding box are matched with the conveying belt and the pushing strip, coal gangue can be forcibly pushed to lift and move in the direction of the crushing barrel, materials can be effectively prevented from sliding or accumulating, and continuous and stable feeding operation is guaranteed; and the sealing shell is arranged at the joint of the feeding box and the crushing barrel, so that the dissipation of dust in the coal gangue conveying and crushing process can be avoided.

The utility model discloses dustproof graphite crusher, including crushing cavity, the top and bottom end of crushing cavity are provided with feed port and discharge port respectively, dust collection cavity, dust collection pump, the dust collection pump includes the air suction pipe and the air outlet pipe, and the dust collection mouth of air suction pipe is located the position of being close to feed port top, the air outlet pipe extends to the bottom of dust collection cavity, sealing plate subassembly, sealing plate subassembly is arranged in the inside of feed port and discharge port, sealing plate subassembly includes the sealing plate of symmetrical hinged setting in the inner wall of feed port, discharge port, be provided with the spring between sealing plate and the inner wall of the side, the end portion of mutual approach of sealing plate still is provided with the magnet of mutual suction. The utility model discloses through setting sealing plate subassembly in the inside of feed port and discharge port, through the synergies of spring and magnet, keep sealed state when no material passes, prevent dust from feed and discharge port and escape, when having material to pass, rely on gravity and open automatically, realize the dual function of sealing and discharging.

The utility model provides a kind of intelligence blowing moxa instrument, comprising: moxa smoke generator main body, treatment component and purification component;The moxa smoke generator main body is used to produce temperature controllable moxa smoke and output;The treatment component includes ear cover and treatment hose, and the two ends of the treatment hose are respectively communicated with ear cover and the moxa smoke output end of moxa smoke generator main body;The purification component includes the waste box being arranged below moxa smoke generator main body, and negative pressure hose is connected between the waste box and ear cover, and catalytic machine is arranged in the inside of the waste box, and the catalytic machine is used to purify moxa smoke.The utility model, by designing independent ear canal, can effectively prevent moxa smoke to escape, and by setting temperature sensor on treatment hose, the temperature of treatment moxa smoke is detected in real time, after exceeding the temperature range set by system, machine will automatically cut off air inlet, close heating system, make moxa stick stop burning, adjust high condensation temperature, avoid scald, improve safety performance.

The utility model discloses a kind of water seal type diffusion partition systems, belong to coal gas valve technical field, including diffusion pipe cavity, sealing cavity and gas pipe cavity sequentially communicated from top to bottom, the sealing cavity outside sequentially communicated with inlet pipe, pressure balance pipe and overflow port pipe from top to bottom, the sealing cavity top end is sequentially provided with transmission wheel and auxiliary wheel from left to right, the gas pipe cavity outlet end is located in sealing cavity.This utility model is easy to operate, can be switched to close tightly at any time, when meeting production emergency accident needs diffusion, can carry out fast diffusion operation.

The utility model provides a combustion nozzle for mixing various waste gases, and belongs to the field of industrial waste gas emission. And the problem of insufficient combustion caused by non-uniform mixing of various waste gases is solved. The multi-hole nozzle comprises a nozzle shell, a multi-hole outer pipe, a multi-hole inner pipe, a fan blade pipe, a vacuum generator and a combustion air gun. An air inlet is formed in the side wall of the nozzle shell; a porous outer pipe and a porous inner pipe are arranged in the nozzle shell, the porous outer pipe is arranged on the outer side of the porous inner pipe, and the top of the porous outer pipe and the top of the porous inner pipe are both connected with the shell cover plate; a spraying opening is formed in the bottom of the nozzle shell; the nozzle shell is connected with a furnace end through a spraying opening, and a negative pressure chamber and a waste gas mixing chamber are sequentially arranged in the furnace end in the gas circulation direction. An air gun connector is arranged outside the furnace end; a fan blade pipe is arranged on the outer side of the porous inner pipe, and a plurality of inclined partition plates are arranged in the fan blade pipe in the circumferential direction at equal intervals. The waste gas mixing device is mainly used for fully mixing various waste gases.

The utility model provides a kind of wall drilling device for fire engineering, including bottom plate, the upper end right side of bottom plate is symmetrically provided with sliding slot, the inside of sliding slot is slidably provided with slide column, the inside of sliding slot is provided with the drive unit for driving slide column to move, the upper end of two slide columns is jointly connected with fixed plate, the right end of fixed plate is provided with mounting plate, and drilling wall piece is provided on mounting plate, the front and rear ends of mounting plate are both provided with fixed frame, rotatingly provided with rotating column in the inside of fixed frame, the both ends of rotating column extend to the outside of fixed frame and are jointly connected with rotating plate, through the wall drilling device for fire engineering of the utility model, not only dust generated in the process of drilling can be adsorbed by dust cover, improve working environment quality, but also the angle of dust cover dust suction can be adjusted by rotating rotating plate, ensure that it is always in the best dust suction position, effectively capture dust generated in the process of drilling, avoid dust to escape.

This application belongs to the field of absorption tower technology and proposes a multi-stage amine liquid escape prevention and interception system, including a spray packing bed, a dry packing bed, and a wire mesh packing bed connected sequentially by a support structure. Through a three-stage interception method, amine droplets, volatile amine vapors, and residual micro-droplets entrained in the gas phase are removed sequentially, thoroughly purifying the vent gas at the top of the tower, preventing amine liquid escape, achieving zero-pollution emissions, reducing amine liquid loss, and lowering operating costs. The upper surface of the spray packing bed is equipped with a spray device, which includes a spray main pipe, spray branch pipes, and spray nozzles. Several arrays of spray branch pipes are arranged on the side of the spray main pipe, and several arrays of spray nozzles are arranged on the side of the spray branch pipes. This enables the spraying of washing liquid, which forms a liquid film on the packing surface. The gas phase and the liquid film are in full contact, and most of the amine droplets entrained in the gas phase are captured by the washing liquid, while the volatile amine vapors are absorbed and dissolved by the washing liquid.

The invention discloses an ultrathin electronic glass slag box pressure control device and a using method, the ultrathin electronic glass slag box pressure control device comprises a nitrogen pipeline connected with a slag box, the output end of the nitrogen pipeline is sequentially connected with a U-shaped heating pipe and an output pipe, the output pipe is connected with a branch pipe in parallel, and the branch pipe extends to a lower cavity of the slag box through a cylindrical exhaust head; the nitrogen pipeline is provided with an electric butterfly valve, the input end of the heating pipe is provided with a flowmeter, the lower cavity of the slag box is provided with a pressure tapping pipe and a pressure gauge, and the output pipe and the branch pipe are wrapped by composite insulating layers. Through cooperative control of the electric butterfly valve, the flowmeter and the pressure gauge, the micro-positive pressure of the lower cavity of the slag box is maintained so as to block external invasion, nitrogen is heated and heat preservation is performed by means of tin bath waste heat, the process consistency is guaranteed, the quality of the lower surface of glass is remarkably improved, the requirements of TP grade judgment and the like are met, and the device is suitable for ultrathin electronic glass production scenes.

This invention discloses an air intake device for a welding fume purifier, comprising a collection box. Two symmetrically arranged sealing bases are provided on one side wall of the collection box. A rotating base is located within each sealing base, and a collection pipe extends through the rotating base into the collection box. A fixing pipe is fixedly connected to the end of the collection pipe furthest from the collection box. An auxiliary mechanism for collecting welding fumes is provided on the side wall of the fixing pipe. This invention solves the problem of inconvenient height and direction adjustment during welding fume intake in welding fume purifiers. The invention incorporates a connecting ring, a filter pipe, a cylinder, a rotating gear, and a drive gear. By controlling the extension and retraction of the cylinder and the rotation of the motor via a control panel, the rotation and vertical movement of the collection pipe can be easily achieved, thus aligning the collection pipe with the welding position and facilitating the adjustment of the collection pipe's position during air intake.

The utility model discloses a traditional Chinese medicine decoction piece processing and powder screening device which comprises a powder screening chamber, a feeding assembly is installed on the top of the powder screening chamber and comprises a spiral conveyor fixedly installed on the outer wall of the top of the powder screening chamber, the spiral conveyor is arranged in a horizontal state, and an outlet of the spiral conveyor is arranged towards the powder screening chamber. A discharging pipe is rotationally connected to the top of the powder screening chamber, the middle part of the discharging pipe is obliquely arranged, the discharging pipe rotationally sleeves an outlet of a spiral conveyor, a funnel-shaped storage hopper is arranged on one side of the top of the spiral conveyor, a bevel gear II is coaxially fixed to one end of a spiral rod in the spiral conveyor, and a bevel gear II is coaxially fixed to the other end of the spiral rod in the spiral conveyor; by arranging the feeding assembly, the feeding channel can be blocked through raw materials, dust is effectively prevented from escaping outwards, the positions of powder can be distributed, the powder can be screened more quickly, and the situation that the powder is accumulated at one position and influences the screening efficiency is avoided.

The utility model relates to the technical field of bag-type dust removers, and discloses a bag-type dust removal connecting structure which comprises a first connecting ring, two connecting blocks are fixedly connected to the inner wall of the first connecting ring, an expansion ring is fixedly connected to the left side of the first connecting ring, and a convex ring is fixedly connected to the left side of the first connecting ring. A second connecting ring is detachably connected to the left side of the first connecting ring, a sealing groove is formed in the second connecting ring, a plurality of first springs are fixedly connected to the inner wall of the sealing groove, sealing rings are fixedly connected to the right sides of the first springs, and a clamping ring is fixedly connected to the interior of the second connecting ring. According to the utility model, dust-containing gas can be effectively prevented from escaping, the clean and safe working environment is guaranteed, the harm of dust to the health of personnel and the surrounding environment is greatly reduced, the stable airflow and pressure environment in the bag-type dust collector can be maintained, the efficient development of dust collection operation is ensured, and the reliable operation cycle and the service life of equipment are prolonged in an assisting manner.

The utility model discloses a kind of garbage cans to form shaping virtual seal to through mouth, belong to garbage can technical field, including the flat cover mechanism being located at the outside of garbage bag, the flat cover mechanism includes inner cover, and the drive module of driving inner cover opening or closing inner opening;The inner cover includes first half cover and second half cover along plane relative opening and closing;Two half covers have height difference to the edge portion of facing each other, and when closing, it is mutually staggered arrangement;Or, two half covers are mutually flush, and when closing, it is mutually abutted.The utility model is shaped and closed bag mouth by setting flat cover mechanism, when cover body closes, garbage bag itself keeps virtual seal state when cover body retreats, not only prevent peculiar smell from escaping in the moment of opening cover, and virtual seal state is automatically released when throwing garbage, avoid the hindrance to throwing action.

A cage replacing table comprises an air supply cover body, a cage replacing table body and a cage replacing table body, the main body is located below the air supply cover body, the top surface of the main body is provided with a cage placing area, the cage placing area is provided with an air return hole, and the mounting hole is opposite to the air return hole; the air pipe is located between the air supply cover body and the main body and connected with the air supply cover body and the main body, and the air supply cover body, the air pipe and the main body form an air supply duct; and the fan, the flow equalizing film and the filtering piece are all arranged in the air supply duct. Disordered airflow in the air supply duct forms laminar flow air after passing through the flow equalizing film, and the laminar flow air is blown out through the mounting hole, flows from top to bottom between the mounting hole and the cage placement area, and then returns to the air passing duct through the air return hole under negative pressure suction of the air return hole; according to the scheme, the stability of laminar flow protection formed by laminar flow air between the mounting holes and the cage containing areas is better, tiny pollutants such as dust can be better prevented from escaping in the cage replacing process, and under the same laminar flow protection performance, the cage replacing table is smaller in size and more convenient to move and use.

The utility model relates to the technical field of lobster culture ponds, and provides a small green dragon culture pond which comprises an inserting groove formed in the surface of the inner wall of one side of a pond body and an anti-falling net inserted into the inserting groove, a pulling plate is fixedly installed on the surface of one side of the anti-falling net, and a through groove is formed in the surface of the outer wall of one side of the pond body. The limiting device comprises a sliding groove formed in the surface of one side of the pool body and two sliding blocks sliding in the sliding groove in a matched mode, a spring is fixedly installed between the two sliding blocks, the limiting device further comprises a hinged plate hinged to the surfaces of the sliding blocks, a T-shaped plate is hinged to the end, away from the sliding blocks, of the hinged plate, an inserting rod is fixedly installed on the surface of the T-shaped plate, and the inserting rod is fixedly connected with the limiting device. Through the limiting device, the anti-falling net can be limited and fixed in the pond body, then the purpose of preventing the small green dragon from escaping is achieved, and the effect of reducing economic losses is further achieved.

The invention relates to the field of food processing, and particularly discloses a bread fermentation accelerant and application thereof in bread baking. The bread fermentation accelerant comprises isomaltooligosacharide, galactooligosaccharide and fructo-oligosaccharide in a mass ratio of 5: (2-4): (1-2). The bread fermentation accelerant has the advantages that the bread fermentation accelerant can be used for bread with the high dietary fiber content, the fermentation capacity of the bread with the high dietary fiber content is improved, the specific volume of the bread is increased, and the bread is full and complete in appearance, soft and elastic in texture, spongy in tissue, uniform in air hole, good in ductility, golden in color and luster, fragrant, soft and delicious.

The invention discloses an aeration pipe mounting structure for a biochemical pool, which comprises an aeration pipe assembly and an air distribution pipe, the air distribution pipe is sleeved with at least one aeration pipe connector, the aeration pipe connector is connected with one end part of at least one aeration pipe assembly, and the other end part of at least one aeration pipe assembly is connected with the aeration pipe assembly. The other end of the aeration pipe assembly is connected with the bottom of the biochemical pool through a bottom connecting piece, the aeration pipe connector comprises an air distribution pipe, a threaded end head and a tail cover, the threaded end head and the tail cover are axially arranged at the two ends of the air distribution pipe respectively, and a poly-plastic microporous pipe coaxial with the air distribution pipe is arranged between the threaded end head and the tail cover. Sealing pieces are arranged between the two ends of the poly-plastic microporous pipe and the threaded end and between the two ends of the poly-plastic microporous pipe and the tail cover, the threaded end is used for being connected with an aerator pipe connector, and the tail cover is used for being connected with a bottom connecting piece. The aerator pipe mounting structure can solve the problems that an existing aerator pipe mounting structure is short in service life, prone to falling off, high in construction cost and low in efficiency.

The application provides an ammonia-sulfur recovery process for ammonia-containing and sulfide-containing wastewater, which comprises the following steps: adsorbing and separating sulfides in ammonia-containing and sulfide-containing wastewater by using iron-carbon composite material to obtain iron-carbon composite material with adsorbed sulfides and ammonia-containing wastewater; and separating and recovering ammonia in the ammonia-containing wastewater by using a gaseous membrane device. The ammonia-sulfur recovery process for ammonia-containing and sulfide-containing wastewater can efficiently recover ammonia and sulfur, has the advantages of low energy consumption and cost, high recovery rate and avoidance of ammonia escape compared with a traditional stripping and stripping method, has the advantages of low comprehensive cost, high recovery efficiency and realization of ammonia and sulfur resource reuse compared with a chemical precipitation method and a biological method. Further, the iron-carbon composite material in the ammonia-sulfur recovery process for ammonia-containing and sulfide-containing wastewater can be recycled, further reducing the cost of consumables.