82results about How to "Reduce the amount of civil works" patented technology

The invention discloses an aquaculture water circulation purification method. The method comprises the following steps: by utilizing a circulating water pump, pumping aquaculture water in an aquaculture pond into a protein separator to carry out protein separation, wherein the ozone accounting for 20% to 30% of the total required ozone quantity is added when the water is pumped into the protein separator; enabling the aquaculture water treated by the protein separator to overflow into a biological mechanical filter to carry out mechanical filtration and biological decomposition; enabling the aquaculture water filtered by the biological mechanical filter to overflow into a disinfection treater to carry out secondary ozone treatment, wherein the ozone accounting for 70% to 80% of the total required ozone quantity is added when the water overflows into the disinfection treater; enabling the aquaculture water treated by the disinfection treater to overflow into an aeration tank to remove the ozone and other harmful gas; and enabling the aquaculture water treated by the aeration tank to overflow into the aquaculture pond. The method disclosed by the invention has the advantages of being less in land occupation, small in civil engineering quantity, low in cost and energy-saving as well as environment-friendly. Therefore, the method is suitable for the aquaculture.

The invention discloses a system and a method for ventilating stacks and collecting exhaust gases and percolate of compost. At least one air tube is laid in a base at the bottom of each stack along a length direction of the stack; grooves are reserved on the bases above vents of the air tubes; ventilation protecting layers are laid in the grooves above the vents; one end of each air tube is connected with a main air tube connected with a blower, while the other end is sealed with a pipe closer; a percolate outlet is downwards reserved at the closed end of each air tube; cleaning grooves are reserved on the peripheries of the pipe closers and the percolate outlets; percolate buffering and discharging devices connected with the percolate outlets are arranged in the cleaning grooves; an exhaust pipeline is arranged above each stack along the length direction; exhaust openings are distributed at the bottom of the exhaust pipeline; and each exhaust pipeline is connected with a main exhausttube. The system and the method have the advantages of greatly reducing the quantity of civil engineering at the same time of ensuring relatively better oxygenation state in the whole composting body, and simultaneously realizing the directed and highly-efficient collection of the exhaust gases produced in a composting process; and the system has a simpler structure and is convenient to operate.

The invention discloses an urban underground comprehensive steel pipe gallery which comprises box type pipe joints, wherein each box type pipe joint is formed by assembling unit plate sheets, and the box type pipe joints are assembled in the axial direction to form a box type pipe gallery; protrusions are arranged on the outer side and / or the inner side of each unit plate sheet, and openings are formed in the periphery of the cross section of each protrusion. Compared with a circular-section pipe gallery, the box type pipe gallery structure of the urban underground comprehensive steel pipe gallery increases the use ratio and the general net width and net height of the internal clearance, the height of the pipe gallery is significantly reduced under the condition of ensuring the same internal clearance space, and therefore the foundation excavation depth is decreased, and the civil engineering quantity is reduced; the bottom straight surface of the pipe gallery can be directly used as a pedestrian passage or a driving passage, so that the most important and the most difficult re-filling and the degree of compaction of a bottom wedge-shaped included angle when the circular-section pipe gallery is re-filled are achieved; the pipe gallery is in a semi-flexible structure, has a good anti-seismic property and good settlement resistant performance, can absorb the trace deformation, and is not easily crazed.

An improved three-pass cylinder drying machine comprises a machine body composed of a bracket, a sealed tank and a cylinder body, and a driving device, a supporting device and a controller, wherein the axial line of the cylinder body of the machine body is parallel to the horizontal surface, an inner cylinder and an outer cylinder that are concentrically arranged are assembled together in a staggered way to form the cylinder body, the formed cavities are used as three drying and precipitation units, the adjacent wallboards of the inner, middle and outer cylinders are connected and positioned via regulating and supporting plates and reinforced buffer plates, a heat insulating cover is disposed at the outer periphery of the wallboard of the outer cylinder, three material homogenizing and spreading machines are respectively disposed at the inner surfaces of the inner, middle and outer wallboards in a screw propulsion way and has reversed helical lines, and gears at the outer periphery of the machine body are aligned with the center of gravity of the cylinder. The inventive three-pass cylinder drying machine effectively solves the shortcomings of the conventional cylinder drying machine, including high deformation and misplacement liability and high axial dislocation liability; and has the advantages of reasonable structural design, stable performance, large precipitation range for one time, high thermal efficiency, saved energy consumptionand wide application range.

The invention relates to a road toll device and particularly discloses a barrier-free dynamic weighing system for road toll. The barrier-free dynamic weighing system for the road toll is characterized in that an L-shaped support A is provided with an antenna and a vehicle license plate recognition system which are placed above a lane, a laser radar B arranged in the center of the lane, a laser radar A and a laser radar C, wherein the laser radar A and the laser radar C are respectively arranged on two edge positions of the lane. The devices arranged on the L-shaped support A are respectively connected with a weighing controller, and a weighing platform with the same width as the weighing controller is arranged on the lane ground. According to the barrier-free dynamic weighing system for the road toll, the laser radars arranged on the L-shaped support or a portal frame are used for vehicle separation, normal pass of vehicles is not affected, and possibilities that the devices are hit and damaged by the vehicles are small.

The invention discloses a directly-connected headstock gear. The speed reducer of the directly-connected headstock gear is a planetary gear speed reducer. The planetary gear speed reducer comprises a fixed flange, a movable flange and an input shaft, wherein the fixed flange of the speed reducer is fixed on a machine frame; the movable flange is fixedly connected with the end of the cylinder of a wire rope reel; the structure part, on one side of the movable flange, of the speed reducer is positioned in the wire rope reel; an electric motor is connected with the input shaft of the speed reducer through a shaft coupling; after the speed is reduced by a speed reducing mechanism of a speed reducer, a torque is output by the movable flange; and the movable flange drives the steel rope reel which is fixedly connected with the movable flange to rotate. The speed reducer and the wire rope reel are not required to be driven by an exposed gear but are connected with each other directly, so that the directly-connected headstock gear provided by the invention is realized. The width of the headstock gear can be reduced by 50 percent; the weight can be reduced by 50 percent; the overall structure is simple; the occupied space is small; the civil engineering quantity is reduced; and moreover, the directly-connected headstock gear is convenient in maintenance and has attractive appearance.

The invention discloses sewage pretreatment microfiltration equipment and method. The microfiltration equipment comprises a water inlet chamber, filter cloth, a water outlet area, a sludge settling area, a sludge thickening area, a sludge collecting area, an air knife cleaning system and a screw press, wherein the filter cloth is arranged in the sludge settling area and the sludge thickening area, filter cloth driving devices are arranged in the sludge settling area and the sludge thickening area, and the air knife cleaning system is arranged below the filter cloth in the sludge thickening area; the screw press is arranged in the sludge collecting area; and a sewage treatment method of the microfiltration equipment comprises three procedures of sludge separation, sludge thickening and sludge dewatering. The equipment can reduce investment cost by 30-60%, and costs for sludge treatment, transportation and disposal are greatly lowered.

The invention provides a production method of melamine by slow cooling crystallization. The method changes the crystallization process of melamine in a reaction gas and chooses scientific and reasonable multi-functional professional equipment to eliminate a cold air preparation process that has high power consumption and has great influence on production stability. Also, at the same time of reaction gas cooling and melamine crystallization, higher value recovery of reaction gas waste heat is realized, and all production equipment can operate stably for a long period. Thus, the product can have lower power consumption, coal consumption and production cost, and investment in device construction can drop significantly.

A turn-over plate type filter pool is composed of pool body, filtering tubes, water collecting chamber, water draining pipe, back flushing pipe, filtering material layer, the canal and overflow dam for draining the black flushing water, and the flap valve consisting of valve frame, flap, sealing rubber ring and drive mechanism which comprises drive cylinder and push-pull connecting rod.

The invention relates to the technical field of the transformer substation and provides a multifunctional cable trench that is provided for solving a problem of the collision between the drain pipe and the foundation of the building and enables the drain pipe length to be saved and the corresponding building project amount to be reduced. The multifunctional cable trench comprises a lower drainage channel formed by masonry at the bottom, a side drain well being arranged beside the lower drainage channel and being communicated with the lower drainage channel, and an upper cable trench being arranged above the lower drainage channel and being communicated with the lower drainage channel. A cable support frame for installing a cable is arranged inside the cable trench; a cable trench cover plate is arranged at the top of the cable trench; and the cable trench and the lower drainage channel are communicated by cable trench drain holes. The multifunctional cable trench has the drainage function; the novel cable trench drainage function and the drainage pipe arrangement at the field of the station are taken into consideration; the drainage pipe arrangement is optimized; the field drainage pipe length is saved; and the collision between the drainage pipe and the building foundation can be eliminated. The building project load can be reduced and the construction costs can be saved.

The invention discloses an arrangement structure of a single-pile nuclear island main workshop of a nuclear power station. The arrangement structure comprises a reactor workshop located in the center of the whole nuclear island main workshop, three rows of adjacent security workshops surrounding the reactor workshop from one side of the reactor workshop and connected with the reactor workshop as well as a fuel workshop and a nuclear auxiliary workshop which surround the reactor workshop from the other side of the reactor workshop. Compared with the prior art, the arrangement structure of the single-pile nuclear island main workshop of the nuclear power station has the advantages as follows: the nuclear island main workshop of the nuclear power station adopts single-pile layout and can easily adapt to a complicated site condition, and work difficulty of the workshop design can be greatly reduced; the three rows of security workshops are separated, internal disaster protection performance is high, main steam and main water supply are introduced out from two sides of the reactor workshop, the breakage accident consequence is limited in a mechanical area of a steam / water supply valve station, and damage to electronic and sensitive facilities is avoided; the reactor workshop, the three rows of the security workshops and the fuel workshop share a raft foundation, the arrangement of the nuclear island main workshop is compact, an excellent anti-seismic property is realized, and structural anti-seismic design and reduction of civil engineering quantity are facilitated.

The invention discloses an exhaust steam waste heat recycling system for a small steam turbine of an induced draft fan through circulating water based on steam turbine driving. An indirect cooling and heat exchange system of the exhaust steam waste heat recycling system is composed of a small turbine condenser, a heat exchanger, a primary air heat exchanger regulating valve, a circulating pump and a main machine condenser. An air pre-heater part exhaust gas heat recycling system is composed of an air pre-heater bypass system, a water supply system and a condensed water system. The small steam turbine exhausts steam into the small turbine condenser, and condensed water generated through condensation of the circulating water which is subjected to indirect cooling and heat exchange is discharged into the main machine condenser. The indirect cooling and heat exchange circulating water absorbs the steam exhaust heat of the small turbine condenser, the circulating pump is used for conducting forced circulation, and the heat exchanger is used for heating primary air and supply air. The circulating pump provides circulating power. An air supply system absorbs most of the steam exhaust heat of the small steam turbine. The primary air system can regulate the heat exchange amount by regulating the opening degree of a baffle according to the actual demand of the system. The exhaust steam waste heat recycling system can replace a primary air and air supply steam air heater which is generally arranged in a north power plant, and the circulating water is used for recycling the exhaust steam waste heat of the small steam turbine of the induced draft fan driven by the steam turbine.

The invention provides an outdoor box type frequency conversion control station, which comprises an inner box part and an outer box part, wherein the outer box part comprises a high-voltage input end, a rectifier transformer with a load switch and a protective cover, wherein the load switch is positioned between the high-voltage input end and the rectifier transformer and is used for inputting high-voltage electricity supplied by the outside and connecting or disconnecting a high-voltage power supply; the rectifier transformer is used for reducing the voltage of the input high-voltage power supply and outputting a low-voltage power supply, and the inner box part comprises a low-voltage bus bar, power distribution switches, frequency inverters for the frequency conversion processing of the low-voltage power output by the rectifier transformer and outputting a driving power supply to an external AC motor, an IO control device for controlling the frequency inverters and related equipment, a heat dissipating device for dissipating heat inside the box body and receiving the control of the IO control device, and a box body for accommodating the low-voltage bus bar, the power distribution switches, the frequency converters, the IO control device, the heat dissipating device and other equipment.

The invention discloses distributed sewage regeneration method, an apparatus and a control system. The distributed sewage regeneration apparatus comprises a tank body, wherein the tank body is provided with a water inlet pipeline and a water production pipeline, the tank body is divided into a hydrolysis acidifying pool, a denitrification pool, an aeration tank, a membrane filter pool, a denitrification dephosphorization region and a regeneration water pool. A partition board is respectively arranged in the hydrolysis acidifying pool and the aeration tank as well as the aeration tank and the membrane filter pool; the water flows to the next water pool through a flowing-guide pipe; and the denitrification dephosphorization region is arranged in the regeneration water pool and partitioned from the middle of the regeneration water pool by a screen with fine hole separating screen. The control system comprises an integrated sewage regenerator, and a water quality testing apparatus and an PLC controller matched with the integrated sewage regenerator, wherein a data signal acquired by the PLC controller realizes remote data acquisition, monitoring and control by means of wireless broadcasting station or an optical communication Ethernet technology or a GPRS technology, thereby the invention has the advantages of compact integral body, convenient installation, easy implementation of remote control, favorable yielding water quality and the like.

The invention relates to a universal fully-effective generating power machine belonging to generating power equipment which can fully and effectively convert conventional energy resources such as water energy, steam energy and the like and new energy resources such as wind energy, steam energy formed by solar heating, tidal water energy and the like into rotating mechanical energy. The machine mainly comprises one or a plurality of jet orifices, a regulating mechanism of the jet orifices, one or a plurality of universal fully-effective rotating wheels, a speed regulator and the like, wherein, the universal fully-effective rotating wheels correspond to the jet orifices and are arranged on a main shaft. The machine can fully develop and utilize water energy, steam energy and wind energy of all types, can fully and effectively convert the utilized water energy, steam energy and wind energy into rotating mechanical energy, can fully replace all current water turbines, steam turbines and wind turbines, and has the advantages of simple structure, reliable performance, low manufacturing cost and easy implementation. Thus, the universal fully-effective generating power machine can replace equipment of hydraulic, thermal and wind power generation industries, and can promote rapid development of new energy resource generating industries such as hydraulic fully-effective power generation, hydraulic wind power generation, solar steam power generation and the like to become main energy source power generating modes.

The invention discloses a submersible aerator which comprises a submersible motor, wherein the upper end of an output shaft of the submersible motor is fixedly provided with a water-retaining flange, the water-retaining flange is fixedly provided with an air separator, the upper end of the air separator is communicated with a vertical air inlet pipe, vanes are arranged at the joint between the water-retaining flange and the air inlet pipe, the water outlet end of each vane is provided with an air outlet, and an air pipe is connected between the air outlet and the air separator. The vanes produce radial water flow under the push and centrifugal force action, and negative pressure is produced after the water flow is spirally driven out from the back vanes, so that air is drawn out through the air outlet and flows together with the water flow; the water flow produced by the back vanes stirs and smashes the air to produce a large number of small bubbles; and since a vane wheel is rotary, the bubbles can flow through the whole bottom of a pool, thereby ensuring more uniform aeration.

The invention discloses a uniflow type ferris-wheel hydraulic turbine connected with a generator by a speed increaser. A ferris-wheel-shaped mechanism consists of an axle, steel wheel carrier and built-in vanes; the uniflow ferris-wheel hydraulic turbine is positioned in a flow channel of a special-purpose wheel groove; the axle is fixed on hydraulic turbine supports arranged at the two sides of the flow channel; the uniflow ferris-wheel hydraulic turbine adopts lever principle; a runner with large diameter is huge like a ferris wheel; a circle of the vanes are arranged at the perimeter of the runner; therefore, the uniflow ferris-wheel hydraulic turbine is obtained; the uniflow ferris-wheel hydraulic turbine makes use of the pressure flow of potential energy difference between up stream and down stream to push directly the vanes on the ferris-wheel to lead the hydraulic turbine to rotate and is characterized by simple structure, low requirements for materials, convenient manufacture, easy maintenance and low cost; as the hydraulic turbine is not required to be buried deeply in water, the quantity of civil engineering including flow channel is reduced by times; the horizontal set ensures that the hydraulic turbine operates with stand-alone configuration or a plurality of hydraulic turbines carry out parallel operation, when in parallel operation, the hydraulic turbines can lead the unit capacity of the generator to be increased by times. By adopting a low-head hydroelectric generating set provided with the novel uniflow ferris-wheel hydraulic turbine, the comprehensive cost of per kilowatt installation is reduced by times, compared with the conventional generating set.

The invention provides a small-size weighing platform continuous vehicle following metering achieving method and system. A small-size weighing platform is adopted so that high accuracy can be achieved. The automatic road scale for continuous vehicle following metering is provided with the weighing platform installed on a road, the vehicle inlet end and the vehicle outlet end of the weighing platform are respectively provided with an axle recognizer and an optical grating vehicle separator, and the axle recognizers and the optical grating vehicle separators are all connected to a computer in a toll booth through a control cabinet. The automatic road scale has the advantages that weighing accuracy is higher than that of an axle load meter, manufacturing cost is lower than that of a whole vehicle weighing device, the civil engineering work amount is small, and the device can be installed in the environment with the slope and is convenient to repair.

The invention discloses a natural draft dry-cooling tower self-supported broadening platform. The broadening platform comprises a broadening platform support frame and a horizontal sealing plate arranged on the broadening platform support frame, wherein the inner side of the broadening platform support frame is supported on cooling tower inclined support columns; the bottom of the broadening platform support frame is supported by support rods of single or double inverted quadrangular pyramid or double-Y-shaped structures; the support rods are connected with the tops of vertical support columns; the vertical support columns are fixed on a foundation; horizontal inclined struts are arranged at the tops of the vertical support columns; the horizontal inclined struts and the cooling tower inclined support columns are tensioned and supported by each other. The natural draft dry-cooling tower self-supported broadening platform has the advantages of loose limitation of the radial width of the broadening platform, small plane external action force applied to the cooling tower inclined support columns, small diameter of the bottom of the cooling tower and low construction cost; compared with the double-Y-shaped support, single or double inverted quadrangular pyramid support can be applied to wider broadening platforms; the broadening platform can be applied to the design of new-built natural draft dry-cooling towers and can also be applied to transformation of the existing air cooling towers.

The invention discloses a hydraulic-drive winch host. The hydraulic-drive winch hoist comprises a rack, a reel, a steering pulley set, a balancing pulley set, a steel wire rope, rigging lantern rings, a hydraulic system, an electrical control system and the like. A hydraulic motor with a hydraulic brake is used in the hydraulic system. The hydraulic motor, the reel and a safety brake are installed on the rack. One end of the reel is provided with the hydraulic motor in power connection with the reel, and the safety brake in power connection with the reel is installed at the other end of the reel. One end of the steel wire rope is fixedly connected to the rack through one corresponding rigging lantern ring, and the other end of the steel wire rope is sequentially wound around the steering pulley set and the balancing pulley set, is wound on the reel and is finally fixedly connected to the reel through one corresponding rigging lantern ring. During stopping or a power failure, the two ends of the reel need to be braked at the same time and cannot be affected by warping of load inertia moment, and therefore braking can be more stable and more effective; the system pressure is set through an overflow valve, overloaded driving force cannot occur, and it is ensured that the phenomena that the steel wire rope is broken and a gate is stuck cannot happen; and the structure is compact, and the civil engineering is simplified.

The sewage dephosphorizing process includes the following steps: A. spreading a bearing layer of 200 mm thickness and a 3-5 mm size limestone filter material layer of 800-1000 mm thickness in the filter pond; B. filtering the sewage with phosphorus concentration of 2.83-5 mg / L in the filter pond, with the contact time between the sewage and the filter material being controlled in 5-30 min and flow rate being controlled in 2-5 m / hr; and C. air and water reverse flushing on the filter material after continuous running of 48-96 hr. The present invention simulates natural dephosphorizing process with slowly released calcium from limestone to react with phosphorus, and makes the effluent reach the draining standard in low cost without pollution.

The invention discloses an underground interchange. The underground interchange comprises an east-west main tunnel and a north-south main tunnel which intersect with each other, wherein the east-west main tunnel is positioned on a lower side of the north-south main tunnel; two ends of the east-west main tunnel are taken as an east road junction and a west road junction respectively; two ends of the north-south main tunnel are taken as a south road junction and a north road junction; an east-to-west right-turn ramp and a north-to-east left-turn ramp are connected between the east road junction and the north road junction; a west-north connection tunnel is connected between the north road junction and the west road junction; a west-to-south right-turn ramp and a south-to-west left-turn ramp tunnel are connected between the west road junction and the south road junction; an east-west connection tunnel is connected between the south road junction and the east road junction. The underground interchange has the advantages of simple structure, need of small underground space area, short building period, low cost, easiness in ensuring a line index, prevention of traffic flow intersection, high vehicle passing efficiency, low energy consumption, and high security performance; the problem of interchange of underground tunnels can be solved well.

The invention discloses a measuring device of a two-wire system reservoir dam seepage line, comprising a plurality of field signal measurement receiving and transmitting units and a main controller, a plurality of the field signal measurement receiving and transmitting units are connected in parallel by two buses connected with the main controller, the bus is a cable with a shielding layer which is grounded; the input terminal of a carrier signal reshaping amplifying circuit A of the main controller is connected with the buses, and the output terminal thereof is connected with a phase-lock loop frequency decoding circuit A; thunder and light surge absorbing circuits of the field signal measurement receiving and transmitting units are arranged between the buses in a bridge connection way, the other terminals are grounded; the input terminal of a DC-DC power supply converter is connected with the buses, and the output terminal thereof is connected with a microprocessor B and a carrier signal reshaping amplifying circuit B; a liquid level sensor is placed inside a piezometer tube. As the two-wire structure is adopted, both power supply and data transmission are completed on the same bus, thus simplifying the work of tube-perforation and wire-distribution, reducing material consumption and civil work amount, and reducing the probability of suffering induction lightning stroke.

The invention discloses a 220kV transformer station secondary equipment prefabricated cabin comprising a rectangular parallelepiped prefabricated cabin shell in which three transverse bearing plates and a plurality of vertical support plates in cooperation with three transverse bearing plates are disposed. The three transverse bearing plates divide, from top to bottom, the inner cavity of the prefabricated cabin shell into a 220kV secondary equipment zone, a main transformer secondary equipment zone, an 110kV secondary equipment zone and a cable storage zone. Each of the vertical support plates is provided with four first cable holes passing through the vertical support plate from left to right. The four first cable holes are located in the 220kV secondary equipment zone, the main transformer secondary equipment zone, the 110kV secondary equipment zone and the cable storage area respectively. The number of the vertical support plates is 2 to 10. The 220kV transformer station secondaryequipment prefabricated cabin is small in occupied area, flexible in layout, high in space utilization rate, reliable in operation of secondary equipment, and reasonable in cable / optical cable laying.

A coupling type automatic road scale is characterized in that the scale is provided with a weighing platform installed on the road surface, and an optical grating vehicle separator and a recognizer for recognizing an upper scale shaft are installed at the end, for vehicles to enter, of the weighing platform; a recognizer for recognizing a lower scale shaft is installed at the end, for vehicles to pull out, of the weighing platform, and the recognizers and the optical grating vehicle separator are all connected to a computer in a toll booth through a control cabinet. The coupling type automatic road scale overcomes the defects that an existing truck scale is high in manufacturing cost, large in basic manufacturing work amount and long in construction period.

The invention discloses a sea water taking instrument for a liquefied natural gas receiving station, and belongs to the field of sea water taking engineering of liquefied natural gas receiving stations. The sea water taking instrument comprises a quay wall type member, a single-pump and single-channel system and a draining blind drain, wherein the quay wall type member is built below the embankment of a working ship wharf; the single-pump and single-channel system is arranged in a water taking pump room; the draining blind drain is built between the quay wall type member and the water taking pump room; the quay wall type member is communicated with the draining blind drain; the draining blind drain is communicated with the single-pump and single-channel system. In the quay wall type member, a water taking port and the working ship wharf are combined into a whole, so that the water front of the wharf is utilized fully; the water taking port is connected with a flow channel of the water taking pump room through the draining water blind drain, so that the influence of open sea waves on the water level fluctuation of the water pump flow channel is eliminated remarkably; a sea water fire pump is arranged at the front end of a sea water taking pump, and share one water taking flow channel with the sea water taking pump, so that the floor area is reduced, and the civil engineering quantity and investment are lowered.

The invention relates to a suspension type cooling tower packing hanging bracket. The suspension type cooling tower packing hanging bracket is provided with load bearing beams, a water collector is arranged above the load bearing beams, and the lower ends of the load bearing beams are provided with spray nozzles; a grid-shaped supporting plate is arranged under the load bearing beams, and packing is placed on the supporting plate; the supporting plate is arranged on the load bearing beams through hanging rods in a hoisting way. According to the suspension type cooling tower packing hanging bracket disclosed by the invention, a load bearing beam which is arranged under a packing bottom layer is omitted in the novel structure, the air circulation area in a cooling tower is enlarged, the ventilation resistance is reduced, the steam-water ratio is facilitated to be increased, and thus the cooling efficiency can be increased; since the load bearing beam which is arranged under the packing bottom layer is omitted, the civil construction engineering amount of cooling tower construction is reduced, the construction investment can be reduced or the occupied area of the cooling tower can be correspondingly lessened, and double significances of economic significance and social significance can be obtained.