30results about How to "Sink quickly" patented technology

The invention relates to fire fighting apparatuses, in particular to electric appliance fireproofing and fire-fighting equipment for a switching room. According to the technical aims, an alarm can be given out at the first time and can be processed through the electric appliance fireproofing and fire-fighting equipment for the switching room. In order to achieve the above technical aims, the electric appliance fireproofing and fire-fighting equipment for the switching room is provided and comprises a fireproofing box, fixing plates, first sliding rails, first sliding blocks, an alarming lamp, a connecting block, a separating plate, a first connecting plate, a second sliding rail, a second sliding block, a first spring and the like; the fixing plates are arranged on the inner walls of the front, back, left and right sides of the interior of the fireproofing box in a bolt connecting manner, the first sliding rails are installed in the fixing plates in a bolt connecting manner, and the first sliding blocks are connected into the first sliding rails in a sliding manner. By means of the electric appliance fireproofing and fire-fighting equipment, the effects of giving out the alarm at the first time and processing the alarm can be achieved; and the manner that the alarm lamp is triggered by burning out a fusing wire when an electric appliance catches a fire is adopted, and therefore a user can rapidly finds the fire.

The invention discloses a method for enhancing ocean carbon sink. According to the method, CO2 is absorbed through photosynthesis of phytoplankton to increase ocean carbon sink. The method includes the specific steps that a specially-made artificial flow building device is utilized to generate upwelling so as to lift abundant nutritive salt seawater in deep ocean up to the surface euphotic layer, surface phytoplankton is subjected to mass propagation (even red tide is caused) and participates in photosynthesis, and a great amount of CO2 is converted into organic matter in the body of the phytoplankton through the photosynthesis; then the artificial flow building device is utilized to generate downwelling so as to rapidly absorb the phytoplankton into the deep ocean, the phytoplankton dies rapidly in a low temperature environment without light, and carbon sinks to the seabed along with the dead living bodies and is stored in an ocean carbon library. According to the method, propagation of the ocean phytoplankton is promoted, and the phytoplankton is made to sink to the seabed rapidly to increase the ocean carbon sink amount, so that the concentration of CO2 in the atmosphere is effectively lowered, and the crisis of climate warming is relieved. The invention further discloses the artificial flow building device for enhancing ocean carbon sink.

The invention discloses a nano-composite adsorbent preparation method directly processing waste water containing chrome tanning. Low-concentration heavy metal waste water is commonly processed by an adsorption method, an ion exchange method and the like currently, and the methods selectively adsorb chrome. According to the nano-composite adsorbent preparation method direct processing the waste water containing chrome tanning, diallyl dimethyl ammonium chloride, methacrylic acid, acrylamide, hydroxyethyl acrylate and nanometer titania are used as raw materials, and aqueous solution free radicals are polymerized to prepare vinyl-based polymer / nanometer titania P (DMDACC-MAA-AM-HEA) / TiO2 nano composite adsorbent. According to the nano-composite adsorbent preparation method directly processing the waste water containing chrome tanning, the adsorbent can directly process low-concentration chrome tanning waste water, chrome removal rate can be 98.6 %, the adsorbent has wide pH value adaptability, has highly-selective adsorbability to Cr, is not prone to being polluted by other pollutant in the waste water, and is large in adsorption capacity, high in processing efficiency, and particularly suitable for processing acidic low-concentration chrome tanning waste water.

The invention discloses a simulation device for simplified calculation of ship-ice collision in a water medium which comprises a water tank, wherein a lifting support frame is arranged in the water tank; an ice body model is arranged on the support frame; a ship model is arranged in the water tank; a guide rail is arranged on the water tank; a towing device is arranged on the guide rail; the towing device is connected with the ship model through a towing truss, a pressure sensor is arranged at the top end of the ship, and the pressure sensor is sequentially connected with a charge amplifier, amulti-channel signal collector and a computer; the ship collides with the ice body model through the driving of the towing device so as to acquire the collision data through the pressure sensor. On the premise of not using ice material, the device can carry out high-pressure loading with different ice body shapes, ice body masses, impact speeds, impact positions, ship model floating states and impact angles, the real situation of the collision between the ship and the ice can be reflected well, the cost is low, the operation is easy, and the risk is small.

The invention relates to a novel offshore fishing device, and belongs to the field of offshore fishing devices. The novel offshore fishing device comprises a hull, hanging arms, a fish net, capstans, fixed pulleys, halyards, a jack stay, a net drawing rope, hoops, a fishing containing net, falling blocks, a contracting opening, a fishing net, hanging rings and a net cover. The fish net is formed by sleeving of the fishing net and the fish containing net, the hoops are arranged on an inlet and an outlet of the fishing net, the outlet of the fishing net is the contracting opening, the inlet of the fishing net is provided with the net cover, an opening of the net cover is bound on the jack stay by the net drawing rope, the hanging rings are welded on the left and right sides of the hoop at the inlet end of the fishing net, the fish net is hung on the hanging arms through the halyards, the top and the tail of each hanging arm are provided with one fixed pulley and one capstan respectively, each halyard is wound on the corresponding fixed pulley to be coiled on the corresponding capstan, and falling blocks are annularly mounted on the periphery of the fish containing net with tail expanded by the corresponding hoop. Therefore, by the device, the problems that a large number of fishes escape from the opening of the fish net when a common fish net is drawn, net drawing completely depends on manpower to cause waste on time and labor and catchable depth adjusting range is limited are solved.

The invention discloses a method for casting a high-quality aluminum part through chips of aluminum-silicon pistons. The method includes the following steps that firstly, embracing and fusion are performed, wherein the machined chips of the aluminum-silicon pistons are recycled, dried and magnetically separated and are then added to a natural gas reverberatory furnace so as to be embraced and fused; secondly, high-temperature standing is performed, wherein the temperature of the natural gas reverberatory furnace is increased to 850 DEG C to 930 DEG C and kept for 50 min to 90 min, and molten aluminum is generated; thirdly, component detection is performed, wherein after slag of the molten aluminum is filtered out, magnesium is pressed to the bottom of the molten aluminum, after the molten aluminum stands still for 5 min to 9 min, a sample is obtained and analyzed, and the molten aluminum is adjusted till the content of each component in the molten aluminum meets the requirement; fourthly, refining and metamorphism are performed, wherein refining is performed before metamorphism; and fifthly, the aluminum part is cast, wherein when the temperature of the refined and metamorphosed molten aluminum ranges from 750 DEG C to 790 DEG C, the molten aluminum is treated through a degassing machine, stands still and is cast into the aluminum part. By the adoption of the method, complex equipment does not need to be invested, operation is easy, secondary aluminum burning losses can be reduced, energy is saved, consumption is reduced, the casting cost of the aluminum part is reduced, the waste aluminum chips are recycled, and the method is suitable for industrial large-scale production.

the invention discloses a penaeus vannamei breeding method. The method comprises the following steps: firstly, injecting seawater into a disinfected pond, wherein the pond communicates with a water circulation device; before throwing young penaeus vannamei, performing inoculation by using 10-15 million / mL of chaetoceros and 10-15 million / mL of dunaliella salina, wherein the chaetoceros and the dunaliella salina are cultivated by using a nutrient solution, and the nutrient solution comprises the following raw materials: ferric chloride hexahydrate, ethylenediamine tetraacetic acid disodium salt, copper sulfate pentahydrate, sodium molybdate dihydrate, zinc sulfate heptahydrate, cobalt chloride hexahydrate, manganese chloride tetrahydrate, vitamin B1, vitamin H, vitamin B12, vitamin B6 and sea salt; after the water quality is stable, throwing 450-550 / m<2> of shrimp fry into the pond; feeding 50-500 grams of feed for every ten thousand of shrimps, wherein 15-20% of the shrimp feed is directly eaten by the shrimps, and the balance of the feed is decomposed by a water treatment device to serve as the nutrition of the chaetoceros and dunaliella salina; meanwhile, keeping the density of the chaetoceros and the dunaliella salina in the pond to be 10-15 million / mL; and performing harvesting in 40-70 days after the shrimp fry are thrown. The penaeus vannamei breeding method provided by the invention is high in breeding survival rate, large in prawn specification and large in yield.

The invention discloses a preparation method of a hydrogel material for bionic fishing baits. By interaction of fish scales, shell powder and hydroxypropyl-beta-cyclodextrin, shell powder with a characteristic of light reflection is adhered to scale surfaces to form duplex reflective substances which are applied to the fishing baits, on the one hand, fishes can be attracted by twinkling under sunlight irradiation to increase the fishing rate, and on the other hand, density and mechanical properties of the material can be enhanced by taking the substances as filler, the material can be quicklyimmersed in water and prevented from floating due to low density. The hydrogel material is applied to the field of the bionic fishing baits to make full use of water-absorption swelling characteristics of hydrogel. When the fishing baits are soaked in water during fishing, the bionic fishing baits quickly absorb water to swell due to excellent swelling characteristics of the hydrogel materials, surface smoothness and wet viscosity are realized, and high biofidelity is achieved. Further, due to the self-repair characteristics of hydrogel, recycling is realized, so that cost saving is realized.

The invention belongs to the field of aquaculture, and particularly relates to tablets for improving the culture environment of a culture pond as well as a preparation method and application of the tablets. The tablets comprise the following raw materials: a bacillus subtilis solid culture and a bacillus amyloliquefaciens solid culture, and further comprise the bacillus subtilis solid culture, thebacillus amyloliquefaciens solid culture, anhydrous sodium sulphate, sodium humate, dolomite powder, zeolite powder, maltodextrin and magnesium stearate. Research shows, in a process of preparing thetablets from the raw materials, a granulation process is not required, direct tabletting is performed, the oxidation-reduction potential and the dissolved oxygen at the bottom of the tank can be quickly improved; the sludge at the bottom of the pond is decomposed, residual feed, excrement, animal and plant corpses and organic chippings at the bottom of the pond are degraded, harmful substances such as ammonia nitrogen, nitrite, hydrogen sulfide and algal toxin at the bottom of the pond can be effectively adsorbed, the acidity of water is reduced, the pH value of the water is stabilized, microelements are supplemented, the transparency of the water is improved, and the purposes of improving substrate and purifying water are achieved.

The invention discloses a lifting aeration device capable of automatic cleaning in sewage treatment. The lifting aeration device comprises a gas inlet main pipe, a gas distribution pipe, a gas distributing converter and an aerator; a gas inlet main valve and a slag hole valve are arranged at the two ends of the gas inlet main pipe correspondingly, the gas inlet main pipe is provided with a water injection branch way and a gas distribution branch way, and the water injection branch way is provided with a water injection opening valve; the first end of the gas distribution pipe is in flange connection with the gas distribution branch way; the gas inlet end of the gas distributing converter is in flange connection with the second end of the gas distribution pipe; and the gas inlet end of theaerator is in flange connection with the gas outlet end of the gas distributing converter. Compared with the prior art, under the situation that a transformed water pool is full of water, the aerationdevice can be mounted easily, conveniently and quickly, blockage of aerator micropores is automatically cleaned, single set of broken-down aeration can be conveniently lifted and maintained in the later period, the application range is wide, management operation is easy, and operation is stable.

The invention discloses a water surface monitoring device, and relates to the field of automatic monitoring. The water surface monitoring device comprises a main equipment box, and a solar cell panel and a camera which are installed at the top of the main equipment box. An equipment box, a self-priming pump, a compression air pump, an upper communicating pipe and a lower communicating pipe are arranged in a shell of the main equipment box. The solar cell is installed at the top of the device in a support mode, the area is larger, the power generation effect is better, the monitoring device is fixed within a small range in an anchor mode, the monitoring effect can be achieved more stably, and the monitoring device can be prevented from floating along with waves to be lost; the device can automatically turn over in storm to protect a solar cell and a camera from being hit by wind, water and rain, the whole device can sink to some extent, the device is more stable and safer, and when the anchor cable is broken after a long time, the device can rapidly sink to the water bottom, follow-up fishing is facilitated, and loss is avoided.

The invention relates to a novel offshore fishing device, and belongs to the field of offshore fishing devices. The novel offshore fishing device comprises a hull, hanging arms, a fish net, capstans, fixed pulleys, halyards, a jack stay, a net drawing rope, hoops, a fishing containing net, falling blocks, a contracting opening, a fishing net, hanging rings and a net cover. The fish net is formed by sleeving of the fishing net and the fish containing net, the hoops are arranged on an inlet and an outlet of the fishing net, the outlet of the fishing net is the contracting opening, the inlet of the fishing net is provided with the net cover, an opening of the net cover is bound on the jack stay by the net drawing rope, the hanging rings are welded on the left and right sides of the hoop at the inlet end of the fishing net, the fish net is hung on the hanging arms through the halyards, the top and the tail of each hanging arm are provided with one fixed pulley and one capstan respectively, each halyard is wound on the corresponding fixed pulley to be coiled on the corresponding capstan, and falling blocks are annularly mounted on the periphery of the fish containing net with tail expanded by the corresponding hoop. Therefore, by the device, the problems that a large number of fishes escape from the opening of the fish net when a common fish net is drawn, net drawing completely depends on manpower to cause waste on time and labor and catchable depth adjusting range is limited are solved.

the invention discloses a penaeus vannamei breeding method. The method comprises the following steps: firstly, injecting seawater into a disinfected pond, wherein the pond communicates with a water circulation device; before throwing young penaeus vannamei, performing inoculation by using 10-15 million / mL of chaetoceros and 10-15 million / mL of dunaliella salina, wherein the chaetoceros and the dunaliella salina are cultivated by using a nutrient solution, and the nutrient solution comprises the following raw materials: ferric chloride hexahydrate, ethylenediamine tetraacetic acid disodium salt, copper sulfate pentahydrate, sodium molybdate dihydrate, zinc sulfate heptahydrate, cobalt chloride hexahydrate, manganese chloride tetrahydrate, vitamin B1, vitamin H, vitamin B12, vitamin B6 and sea salt; after the water quality is stable, throwing 450-550 / m<2> of shrimp fry into the pond; feeding 50-500 grams of feed for every ten thousand of shrimps, wherein 15-20% of the shrimp feed is directly eaten by the shrimps, and the balance of the feed is decomposed by a water treatment device to serve as the nutrition of the chaetoceros and dunaliella salina; meanwhile, keeping the density of the chaetoceros and the dunaliella salina in the pond to be 10-15 million / mL; and performing harvesting in 40-70 days after the shrimp fry are thrown. The penaeus vannamei breeding method provided by the invention is high in breeding survival rate, large in prawn specification and large in yield.

The invention provides a granular composite bottom treatment bacterium and a preparation method thereof. The formula of the composite bottom treatment bacterium comprises the following components: 0.5-1.5% of photosynthetic bacterium flocculant, 0.1-1% of liquid Bacillus natto, 35-53% of bentonite, 35-53% of granular zeolite powder, 1-5% of attapulgite, 2-6% of sodium percarbonate, 0.5-1.5% of sodium dihydrogen phosphate and the balance of normal saline. The preparation method comprises the following steps: evenly sprinkling the photosynthetic bacterium flocculant and the liquid Bacillus natto on the zeolite powder, evenly mixing, adding the bentonite, and then mixing; evenly mixing the sodium percarbonate, the sodium dihydrogen phosphate and the attapulgite; and mixing the two mixtures obtained in the previous steps, adding the normal saline, sufficiently stirring and mixing, putting in a granulator, and granulating. According to the invention, the viable granular composite bottom treatment bacterium has a high survival rate, can quickly sink to the bottom after being directly sprinkled, has remarkable cracking effect when encountering water and is convenient to use; sludge at the bottom of a pool can be quickly decomposed and degraded into organic substances; harmful substances can be effectively adsorbed; the acidity of a water body can be reduced, the pH value of the water body can be stabilized, minor elements can be supplemented, and the transparency of the water body can be enhanced; and bottom sediments can be improved, and water can be purified.

The invention discloses a simulation device for simplified calculation of ship-ice collision in a water medium which comprises a water tank, wherein a lifting support frame is arranged in the water tank; an ice body model is arranged on the support frame; a ship model is arranged in the water tank; a guide rail is arranged on the water tank; a towing device is arranged on the guide rail; the towing device is connected with the ship model through a towing truss, a pressure sensor is arranged at the top end of the ship, and the pressure sensor is sequentially connected with a charge amplifier, amulti-channel signal collector and a computer; the ship collides with the ice body model through the driving of the towing device so as to acquire the collision data through the pressure sensor. On the premise of not using ice material, the device can carry out high-pressure loading with different ice body shapes, ice body masses, impact speeds, impact positions, ship model floating states and impact angles, the real situation of the collision between the ship and the ice can be reflected well, the cost is low, the operation is easy, and the risk is small.

The invention discloses a preparation method, product and application of a modified montmorillonite, which belongs to the technical field of water body algae removal. The invention pretreats the montmorillonite and activates it with acid to obtain a modified montmorillonite, which is used as The raw materials are respectively ironized, acid modified, and ferricized to obtain a water algaecide and an algae extracellular secretion remover; the water algaecide prepared by the present invention can make the algae sink to the bottom quickly; the prepared algae Extracellular secretions remover can effectively oxidize and remove algal extracellular secretions, and can destroy the integrity of algal cells for the second time, overcoming the traditional method of using flocculation and adsorption that leads to secondary outbreaks of algal cells that are not inactivated and caused by untreated algae. The problem of water body pollution caused by extracellular secretions; when the water algaecide and algae extracellular secretions remover prepared by the present invention are used for algae removal, the amount of materials used is small, the time required for treatment is short, and the treatment effect is good, especially suitable for Emergency treatment of algal blooms in lakes and reservoirs.

A preparation method that can completely decompose the solid corrosion agent, mix the lactic acid with the catalyst evenly, heated the reaction to obtain a lactic acid hyperthyroidism;Species or multiple, then react 1 to 4h at 155-165 ° C, and then react 1‑4h at 175-185 ° C to get a lactic acid co -polymer; then add a corrosion agent, under 135‑145 ° C, stir 1‑4h under 1‑4hAdd the additive, stir at 0.5‑3h at 135‑145 ° C; add zinc powder or aluminum powder, stir at 0.5‑3h at 135‑145 ° C, add peroxide, and make granules after reaction.The price of solid slow release agents of the invention is low, the structure is stable, and the release rate of the corrosion agent is controlled.The structure of the lactic acid clustering on the corrosion agent is stable, and then through cross -linking, the service life of this corrosion in the underground can reach more than 3 months.

The invention discloses a method for casting a high-quality aluminum part through chips of aluminum-silicon pistons. The method includes the following steps that firstly, embracing and fusion are performed, wherein the machined chips of the aluminum-silicon pistons are recycled, dried and magnetically separated and are then added to a natural gas reverberatory furnace so as to be embraced and fused; secondly, high-temperature standing is performed, wherein the temperature of the natural gas reverberatory furnace is increased to 850 DEG C to 930 DEG C and kept for 50 min to 90 min, and molten aluminum is generated; thirdly, component detection is performed, wherein after slag of the molten aluminum is filtered out, magnesium is pressed to the bottom of the molten aluminum, after the molten aluminum stands still for 5 min to 9 min, a sample is obtained and analyzed, and the molten aluminum is adjusted till the content of each component in the molten aluminum meets the requirement; fourthly, refining and metamorphism are performed, wherein refining is performed before metamorphism; and fifthly, the aluminum part is cast, wherein when the temperature of the refined and metamorphosed molten aluminum ranges from 750 DEG C to 790 DEG C, the molten aluminum is treated through a degassing machine, stands still and is cast into the aluminum part. By the adoption of the method, complex equipment does not need to be invested, operation is easy, secondary aluminum burning losses can be reduced, energy is saved, consumption is reduced, the casting cost of the aluminum part is reduced, the waste aluminum chips are recycled, and the method is suitable for industrial large-scale production.

The invention provides an offshore oil platform pollution condition monitoring device. The device comprises a moving block, a transverse frame, a pushing module, a rotating module, a mounting frame, an anti-rollover protection device, a PH detection module, a limiting rope frame structure, a rechargeable lithium battery, a processing unit, a positioning module, a solar power generation module, a wireless communication module, a camera device, a seawater collection device and a deep water detection device. The transverse frame is mounted on a lower portion of the moving block through bolts; thepushing module is installed on a left side and a right side of the transverse frame through the bolts; the rotating module is embedded into the middle upper part of the moving block; and the mountingframe is mounted on an output shaft at the upper part of the rotating module through the bolts. A rubber air bag is connected to one side of the protection plate in a glued mode and arranged on the inner side of the storage frame at the same time, the rubber air bag can be inflated when a water surface is thin, cool and large, and therefore buoyancy of the device is increased, and a problem thatrollover is generated when stormy waves are large is solved.

The invention provides a convective dust removal device which comprises a plurality of water tanks, a smoke inlet condensation cylinder, a plurality of middle condensation cylinders, a smoke outlet condensation cylinder and a plurality of communicating pipes, wherein the number of the smoke inlet condensation cylinder, the middle condensation cylinders and the smoke outlet condensation cylinder is equal to that of the water tanks; the smoke inlet condensation cylinder, the middle condensation cylinders and the smoke outlet condensation cylinder are mounted on the water tanks respectively, communicate with the corresponding water tanks respectively and communicate with one another through the communicating pipes in sequence; one end of the communicating pipe between the smoke inlet condensation cylinder and the middle condensation cylinder adjacent to the smoke inlet condensation cylinder or between every two adjacent condensation cylinders or between the middle condensation cylinder adjacent to the smoke outlet condensation cylinder and the smoke outlet condensation cylinder is connected with the smoke inlet condensation cylinder or one middle condensation cylinder, and the other end of the communicating pipe extends into another middle condensation cylinder or the smoke outlet condensation cylinder, so that smoke is jet into the middle condensation cylinders or the smoke outlet condensation cylinder; the center axis of the end part, extending into one middle condensation cylinder or the smoke outlet condensation cylinder, of each communicating pipe is perpendicular to the horizontal plane of the corresponding water tank; the smoke inlet condensation cylinder communicates with a smoke exhaust pipe which is vertically inserted into the smoke inlet condensation cylinder and is perpendicular to the horizontal plane of the corresponding water tank; and the smoke outlet condensation cylinder is connected with another smoke exhaust pipe.

The invention discloses an efficient feeding management method for solenaia oleivora and pelteobagrus fulvidraco three-dimensional breeding, and relates to the technical field of ecological breeding.The specific management method comprises the following steps of 1) feeding the solenaia oleivora, wherein a small amount of baits are cast after 5-10 days of fries, powdery baits are taken as main materials in the early stage, and prepared solenaia oleivora feed is taken as main materials in the middle and later stages; and (2) feeding pelteobagrus fulvidraco, wherein feeding is conducted after fish fries enter a pond for 2-3 days, and the feeding amount and the feeding frequency are effectively adjusted according to the changes of the water temperature and the seasons. The two kinds of feed are distributed in pond water in a layered mode, so that directional feeding between the feed and animals in mixed breeding is achieved, the utilization efficiency of the special feed is improved, growth acceleration and health states of the animals are promoted, and the phenomena of turbid water and reduced visibility caused by frequent activities of the animals at the bottom of the pond due to insufficient feed amount caused by food seizing of the symbiotic animals can be avoided.

The invention discloses a sealing and connecting structure for pile driving. The seal connection structure comprises a plurality of inter-pile sealing structures evenly distributed and a plurality of inter-pile connecting structures which are arranged between first sub pile bodies and second sub pile bodies of the pile bodies, and each inter-pile sealing structure is composed of a first sealing groove downward extending from the top of the first sub pile bodies and arranged on the upper side of the first sub pile bodies, and a second sealing groove downward extending from the top of the second sub pile bodies and arranged on the upper side of the second sub pile bodies; botches of the two sealing grooves are opposite, and each inter-pile connecting structure is composed of a concave connecting member downward embedded in the first sub pile bodies from the top of the first sub pile bodies, and a convex connecting member downward arranged in the second sub pile bodies from the top of the second sub pile bodies; and the embedding part of the convex connecting member is embedded into the cavity of the concave connecting member, so that the two sealing grooves are in butt joint to form an inter-pile water space filled with flexible filler, and an inter-pile closed space is formed in the cavity of the concave connecting member, and filled with grout for consolidation. The sealing and connecting structure disclosed by the invention has the advantages of simple structure, low cost, and high reliability and adaptability, and can be used for driving piles into soil quickly.

The invention discloses a nano-composite adsorbent preparation method directly processing waste water containing chrome tanning. Low-concentration heavy metal waste water is commonly processed by an adsorption method, an ion exchange method and the like currently, and the methods selectively adsorb chrome. According to the nano-composite adsorbent preparation method direct processing the waste water containing chrome tanning, diallyl dimethyl ammonium chloride, methacrylic acid, acrylamide, hydroxyethyl acrylate and nanometer titania are used as raw materials, and aqueous solution free radicals are polymerized to prepare vinyl-based polymer / nanometer titania P (DMDACC-MAA-AM-HEA) / TiO2 nano composite adsorbent. According to the nano-composite adsorbent preparation method directly processing the waste water containing chrome tanning, the adsorbent can directly process low-concentration chrome tanning waste water, chrome removal rate can be 98.6 %, the adsorbent has wide pH value adaptability, has highly-selective adsorbability to Cr, is not prone to being polluted by other pollutant in the waste water, and is large in adsorption capacity, high in processing efficiency, and particularly suitable for processing acidic low-concentration chrome tanning waste water.

The invention belongs to the field of engineering construction, and particularly relates to a rapid pile forming device and a pile forming method thereof. The rapid pile forming device comprises a ventilation immersed tube, wherein at least one ventilation tube is arranged on the wall of the ventilation immersed tube; one end of the ventilation tube is connected with an air compressor; the other end of the ventilation tube is provided with an air outlet; the air outlet is located in the inner wall of the ventilation immersed tube; and the outer wall of the ventilation immersed tube is connected with a power device. According to the rapid pile forming device, soil in the ventilation immersed tube is discharged to form a hole through compressed air mainly and air pressure. By means of the rapid pile forming way, the working efficiency is improved, and the pile foundation construction cost is reduced. The discharged soil, curing agents such as cement and materials such as water are mixedto form a flow-state mixture to be poured into a pile, so that the stirring uniformity of the curing agents such as cement and the soil and the construction efficiency of the whole construction process are improved. Meanwhile, the whole construction cost is greatly reduced, the whole structure is simple, and operation is convenient.

The invention discloses a pile sinking device for precast pile construction, which comprises three vertical piles arranged in an equilateral triangle, each pile is provided with a vertical indicator, the upper ends of the three piles are provided with a common pile frame, the center of the pile frame is provided with a steel wire rope in a penetrating manner, the center of the lower end face of the pile frame is provided with a guide sleeve for the steel wire rope, and one side of each pile is provided with a support. The upper end of the steel wire rope is wound on the outer side of the upper portion of the pulley and then is connected to the winch in a winding mode, the lower end of the steel wire rope is connected with a pile hammer in a hanging mode, hollow guide rails with the inner ends facing the center lines of the three piles are arranged on the inner sides of the piles, and a plurality of evenly-parallel position lines are arranged on the outer side faces of the hollow guide rails in an up-down mode. The hollow guide rail is provided with a plurality of horizontal telescopic rods which can move up and down in parallel along the hollow guide rail, and the inner ends of the horizontal telescopic rods face the center line of the three piles. The inner ends of the horizontal telescopic rods are provided with clamping cambered surfaces. The device has the advantages of being simple in structure and convenient to use, and the precast pile can be assisted to vertically and rapidly sink into the ground.