42results about How to "Improve water distribution" patented technology

An adjustable arc sprinkler includes first and second adjacent members that define a nozzle orifice. The first member can be connected to the end of a riser and defines a flow path leading to the nozzle orifice. The second member is rotatable relative to the first member to select a desired size of an adjustable arc fan-shaped water spray pattern when water travels through the flow path and is ejected from the nozzle orifice. A pair of features formed on the first and second members are configured to enhance a distribution of water at the edges of the water spray pattern.

The invention relates to the technical field of sewage treatment, in particular to a sewage treatment tridimensional artificial wetland system that is used for the industrial waste water treatment of small-scale isolated pollution sources. The invention aims at providing a tridimensional artificial wetland system that is used for sewage treatment and that has small floor occupancy, high hydraulic load, high pollution load and long service life so as to overcome the defects of the current sewage treatment of big artificial wetland floor occupancy, low hydraulic load, low pollution load and short system service life. The key points of the invention are that: the artificial wetland for sewage treatment adopts a tridimensional assembled structure of vertical current artificial wetland and horizontal subsurface flow artificial wetland, and base materials are filled in various directions to form the tridimensional artificial wetland system for sewage treatment; the tridimensional artificial wetland system for sewage treatment comprises a water collecting header, a porous water-filtering vertical current artificial wetland bed, a first-stage regulating tank, a water drop chute, a grid tank, a second-stage regulating tank, a horizontal subsurface flow artificial wetland bed and a water collecting tank.

The invention relates to a subsurface flow constructed wetland sewage treatment system by drop water aeration oxygenation, composed of drop water aeration subsurface flow constructed wetlands in one stage or multistage series. Each stage of drop water aeration subsurface flow constructed wetland comprises a bed body, an inflow barricade, an outlet barricade and a drop water baffle; wherein a plurality of deflectors, gravel fillers and emergent aquatic plants are arranged in the bed body between the inflow barricade and the outlet barricade. The invention is even in water distribution, small inwake space and uniform in water impact, residence time of sewage in the bed body is extended, blocking is difficult, thus being beneficial to improving effluent quality and biodegradation of microorganism on nutrient such as nitrogen, phosphor and the like in the sewage, and construction and running cost is low. The invention, under the joint action of the effects, can effectively degrade pollutant of urban and town domestic sewage, a small amount of industry waste water and farm drainage and is applicable to mountain land and hilly country with certain gradient.

The present invention relates to a silencer (25a) for the attenuation of noise occurring in an intake airstream (10, 27) of a gas turbine (1-3). According to the invention, in this case, the silencer (25a) has means (31, 32, 33, 34) for the introduction of water and / or steam into the intake airstream (10, 27). These means may be designed, in particular, in the form of Venturi tubes (31), the water (29) being supplied, in particular above the saturation limit, to the airstream (27) via nozzles (33) arranged at the narrowest point. In this way, the silencing can be combined at the same time with the introduction of water for increasing the power output or for the general regulation of the gas turbine, this being achieved with a comparatively simple design.

A silencer (25a) for the attenuation of noise occurring in an intake airstream (10, 27) of a gas turbine (1–3) includes a device or devices (31, 32, 33, 34) for the introduction of water and / or steam into the intake airstream (10, 27). These devices may be designed, in particular, in the form of Venturi tubes (31), the water (29) being supplied, in particular above the saturation limit, to the airstream (27) via nozzles (33) arranged at the narrowest point. In this way, the silencing can be combined at the same time with the introduction of water for increasing the power output or for the general regulation of the gas turbine, this being achieved with a comparatively simple design.

A passive direct oxidation fuel cell system, which uses a high concentration fuel such as neat methanol as a direct feed to an anode aspect of the fuel cell, is provided. The fuel cell includes a passive water management capability, achieved by the combined functions of controlled fuel dosing, effective push back of liquid water from the cathode through the membrane electrolyte by a hydrophobic microporous layer well bonded to the cathode catalyst and the use of a thin ionomeric membrane. The rate of fuel delivery is controlled by a passive fuel transport barrier. Carbon dioxide management techniques are also provided.

The invention belongs to the technical field of environmental protection, and particularly relates to a preparation method of an algae biofilm and application thereof in sewage treatment. The preparation method specifically comprises the steps of carrier pretreating, algae culturing, algae domesticating and algae biofilm preparing. The preparation method of the algae biofilm has the advantages that the preparation cost is low, the raw materials are easy to obtain, and the algae biomass is easy to recycle; the prepared algae biofilm can achieve the efficient nitrogen and phosphorus removal effect in sewage treatment, achieves the purpose of general sewage treatment and not only can overcome the defects that in a suspended algae system, the algae density is low, the hydraulic retention time is long, algae and water are difficult to separate, too more suspended solids (SS) exist, the resource recycling rate is low but also has the advantages of reducing immobilization reagent cost, weakening the influences of immobilization reagents on the algae activity, reusing immobilization carriers and the like.

The invention relates to a bionic type water treatment filler, in particular to a bionic type water treatment filler applied in waste water generated in ready orgthe banism treatment. The bionic type water treatment filler comprises a middle rope, and a filler rope wound on the middle rope, the filler rope comprises a plurality of spiral filler units which are connected end to end, each filler unit comprises a filler unit first part penetrating in the middle rope, and a filler unit second part penetrating out of the middle rope, the filler unit first part and the filler unit second part are connected, and the filler unit second part is approximately annular. Through the improvement of structure and selection of filler materials, the bionic type water treatment filler has the advantages of being not easy to plug, stable in the quality of effluent water, good in treatment effect and long in service life.

The invention relates to the technical field of crop quantitative irrigation, in particular to a method and a system for crop quantitative irrigation control on the basis of the Internet of Things. The system comprises a crop water requirement measuring system, a crop irrigation control system and a crop irrigation real-time monitoring system. The crop water requirement measuring system is connected with the crop irrigation control system which is connected with the crop irrigation real-time monitoring system, and the crop irrigation real-time monitoring system is connected with the crop water requirement measuring system. The method and the system for crop quantitative irrigation control on the basis of the Internet of Things have advantages that accurate irrigation can be performed in appropriate time and quantity according to crop water requirements, analysis according to monitoring acquired data is realized, and accordingly irrigation schemes can be made according to real-time conditions to optimize water distribution, and water saving and yield increasing are realized.

The invention provides a canal system intelligent water-saving system and method. The canal system intelligent water-saving system comprises a central controller, a data processing module, canal flowmeters and water volume control valves; the water volume control valves are connected with the central controller and mounted at water supply openings of a main canal, branch canals, lateral canals and sublateral canals to control the water supply quantity of the canals; the central controller is sequentially connected with the data processing module and the canal flow meters; and the canal flow meters are mounted at the water supply openings of all the canals. According to the method, a hydrodynamic water-saving algorithm model is established, the water distribution amount and the water distribution time of a canal system are adjusted through the system, so that water saving is realized.

The invention belongs to a fluid control device, and particularly relates to an interruption-rotating water granulation device of a reaction-type spraying nozzle. The interruption-rotating water granulation device is mainly composed of a damping sleeve, a spraying disk, a water distributing disk, a center shaft, a fixing gear disk and a supporting frame, wherein water distributing teeth are arranged on the outer side of the water distributing disk, and meshing teeth are arranged on the inner side of the water distributing disk. When the spraying nozzle works, a jetting flow impacts the water distributing teeth, and therefore the jetting flow is broken, short-jetting-range spraying is achieved, when the jetting flow deviates from the water distributing teeth, long-jetting-range spraying is achieved, the meshing teeth and upper teeth on the fixing gear disk interact, and interruption rotating of the water distributing disk is achieved. Through mutual matching of the spraying disk, the water distributing disk and the fixing gear disk, breakage of the jetting flow and the interruption rotating are achieved, finally, overlapping of the long jetting range and the short jetting range in different angles is achieved, and water amount distribution of the spraying nozzle under the low-pressure work condition is improved. The interruption-rotating water granulation device is simple in structure, reliable in operation, stable in working, and capable of improving distribution of the water amount of the spraying nozzle and improving spraying evenness under the condition that the jetting range is not reduced.

The invention discloses a rural sewage enhanced composite anaerobic treatment device and a treatment method. The treatment device comprises an anaerobic baffle reaction zone; the interior of the anaerobic baffle reaction zone is divided into a plurality of up-flow type suspended sludge bed reaction compartments and a sludge settling compartment by guide plates; the upper part of the up-flow type suspended sludge bed reaction compartments is filled with a composite fiber filler, and microporous aeration heads are formed at the bottom of the up-flow type suspended sludge bed reaction compartments; the treatment device further comprises a multi-media combined anaerobic biological filtration zone communicated with the sludge settling compartment; and the interior of the multi-media combined anaerobic biological filtration zone is filled with an active lightweight biological filler, and up-flow type water distribution is adopted for secondary treatment of settled sewage. The method for treating sewage by adopting the device comprises the following steps: the rural sewage enters the anaerobic baffle reaction zone, suspended matter and partial dissolved organic matter in the sewage are first removed through the up-flow type suspended sludge bed reaction compartments, and then the sewage flows into the sludge settling compartment, after most of the sludge is deposited, the sewage flowsinto the multi-media combined anaerobic biological filtration zone to further remove the dissolved organic matter.

The invention relates to the technical field of sewage treatment, in particular to a sewage treatment tridimensional artificial wetland system that is used for the industrial waste water treatment ofsmall-scale isolated pollution sources. The invention aims at providing a tridimensional artificial wetland system that is used for sewage treatment and that has small floor occupancy, high hydraulicload, high pollution load and long service life so as to overcome the defects of the current sewage treatment of big artificial wetland floor occupancy, low hydraulic load, low pollution load and short system service life. The key points of the invention are that: the artificial wetland for sewage treatment adopts a tridimensional assembled structure of vertical current artificial wetland and horizontal subsurface flow artificial wetland, and base materials are filled in various directions to form the tridimensional artificial wetland system for sewage treatment; the tridimensional artificialwetland system for sewage treatment comprises a water collecting header, a porous water-filtering vertical current artificial wetland bed, a first-stage regulating tank, a water drop chute, a grid tank, a second-stage regulating tank, a horizontal subsurface flow artificial wetland bed and a water collecting tank.

The invention relates to the technical field of ecological environment remediation and particularly relates to an intelligent ecological land irrigation and desert control remediation system. The system comprises a primary water storage tank, a plurality of first-stage separate water storage tanks and second-stage separate water storage tanks, wherein a deep well is formed at the primary of the water storage tank, a lifting pump for injecting water into the primary water storage tank is placed in the deep well, the first-stage separate water storage tanks are arranged around the primary waterstorage tank and are in run-through connection with the primary water storage tank through irrigation rigs, and the second-stage separate water storage tanks are arranged at positions further away from the primary water storage tank. Through arranging a land humidity sensor and an intelligent motherboard, the intelligent motherboard can coordinate a supply and demand relationship among the primarywater storage tank, the first-stage separate water storage tanks and the second-stage separate water storage tanks, and hydropenic regions are irrigated in case of water shortage, so that optimized water allocation is achieved, the volume of water can be saved to the maximum, and thus, maximal-area irrigation with minimal water volume is achieved.

The invention provides a die mechanism which can online detect pull-extrusion traction force, and a pull-extruder thereof, belonging to the field of the pull-extrusion forming equipment of composite material; wherein, a traction mechanism consists of a first traction mechanism and a second traction mechanism; a thermoplastic forming die part is provided with a pull-extrusion die which is clamped by a die pressing clamp; a guideway structure is arranged between a die workbench plate and a frame; the reasonable arrangement of the die mechanism can realize online detecting the traction force; the composite material dual-head pull-extruder of the invention is provided with the first traction mechanism and the second traction mechanism; the first thermoplastic forming die mechanism and the second thermoplastic forming mechanism form two paths of pull-extrusion lines which commonly share a felt-supply yarn-passing mechanism, the structure of a yarn-supply mechanism and a middle frame; therefore, the land occupying area of the equipment is effectively saved and the production efficiency of the equipment is improved; a glue trough at a dipping part is smartly designed, thus being more beneficial for the distribution of water flow in the interlayer of the trough bottom and improving heat dissipation effect; the die mechanism and the pull-extruder of the invention have simple structure and low manufacture cost, are easy for production regeneration, have obvious technical contribution, and completely realize the aims of all the inventions.

The invention discloses a novel FPM (Filterable Particulate Matter) integrated rural sewage treatment device, and belongs to the field of water treatment. The device has a columnar structure, and comprises a fourth-order light quantum water channel, a first-order reaction zone, a second-order reaction zone and a third-order reaction zone in sequence from outside to inside, wherein the first-orderreaction zone is an annular oxidation channel which is mainly used for performing a nitrification-denitrification process; a first-order clarification zone is arranged in the annular oxidation channel; properly-clarified effluent enters the second-order reaction zone; the second-order reaction zone is used for performing mobile suspension bed biological activated sludge treatment and secondary denitrification, and lowering the organic load of subsequent deep bed filtration treatment; sewage enters the third-order reaction zone, and the reaction zone is a deep bed interception zone; third-orderdeep bed intercepted effluent is introduced into the fourth-order light quantum water channel on the outermost circle of a main body, and the sewage is deeply disinfected in the fourth-order light quantum water channel. For rural sewage with high ammonia nitrogen content, the integrated device has the advantages of small occupation area, short running period, no secondary pollution, easiness in construction and installation, convenience in automatic operation, and capability of efficiently removing ammonia nitrogen and organic matters.

The invention discloses a full-quantitative treatment process for landfill leachate, which specifically comprises the following steps of: (1) adjusting the physicochemical properties of landfill leachate, and filtering the landfill leachate; (2) adding the pretreated landfill leachate into a nitrosation-anaerobic ammonia oxidation integrated bioreactor for biochemical treatment; (3) performing reverse osmosis treatment on the landfill leachate subjected to biochemical treatment through a reverse osmosis membrane to obtain a concentrated solution and a first clear solution; (4) adding a softening agent into the concentrated solution for softening treatment to obtain a softened concentrated solution; (5) evaporating the softened concentrated solution to obtain a second clear solution; and (6) mixing the first clear solution and the second clear solution, and discharging the mixed clear solution after the mixed clear solution reaches the standard. The landfill leachate is sequentially subjected to pretreatment, biochemical treatment, reverse osmosis treatment, softening treatment, evaporation treatment and subsequent treatment, so that most pollutants in the landfill leachate are separated out, the purpose of purifying water is achieved, the water is pure, and the energy consumption is ultralow.

The invention discloses an intelligent sterilization and disinfection device for medical equipment. The device comprises a cleaning box body, a high-pressure fan, a mounting plate, a water distributor, a liquid inlet pipeline, a placement frame, a partition rod, a limit frame, a guide cover, a waste collection frame, a filter screen, a liquor drainage pipeline and a driving assembly. According tothe intelligent sterilization and disinfection device for the medical equipment, cleaning liquid is transported through the liquid inlet pipeline, the cleaning liquid is conveniently distributed through the water distributor, the driving assembly vibrates the placement frame, impurities on the medical equipment are conveniently vibrated during the cleaning process, the filter screen in the waste collection frame filters the impurities in waste liquid, and then the filtered waste liquid is discharged through the liquor drainage pipeline, so that the impurities in the waste liquid are avoided from blocking the liquor drainage pipeline, and the high-pressure fan air-dries the cleaned medical equipment in real time; and in addition, due to the fact that the waste collection frame is slidably connected with the cleaning box body, a user can conveniently remove the impurities in the waste collection frame in time.

The invention relates to an electrochemical treatment device for sewage and wastewater treatment, which comprises a reaction tank and an electrochemical reaction module, wherein the electrochemical reaction module and the reaction tank are separate; the electrochemical reaction module comprises a support structure and pole plates arranged in the support structure; the pole plates are composed of an inert pole plate and a soluble pole plate; and the inert pole plate is connected with a power source. The electrochemical treatment device in such a structure can shorten the pole plate changing time of support devices, postpone the loss of the pole plates, enhance the treatment efficiency of the device, improve the stability of the device and lower the operating cost of the device.

The invention discloses a lateral inflow uniform water distribution system of a wetland system. The lateral inflow uniform water distribution system comprises a water tank, a partition plate and transverse breast boards, wherein a plurality of transverse breast boards are uniformly and fixedly arranged inside the water tank by stretching across the partition plate along the width direction, one end of each group of transverse breast board extends out of the side wall of the water tank and is provided with a volume reel in a rotating manner, a sinking plate is arranged below each group of transverse breast boards in a suspending manner by virtue of a traction wire, a driving tooth column which is fixed on the outer side wall of the water tank is arranged below the volume reel, an auxiliarytooth column which is movably arranged inside the side wall of the water tank is arranged between the driving tooth column and the volume reel, the side wall of the water tank is provided with a waterinlet pipe, the water inlet pipe is fixedly provided with a water distribution pipe penetrating through the water inlet pipe, a trunk pipe is uniformly and fixedly provided with a plurality of groupsof branch pipes, and a spray head assembly is fixedly arranged below each group of branch pipes. The lateral inflow uniform water distribution system is simple in structure, convenient to use, capable of uniformly distributing water for the wetland system, also capable of cleaning the vegetation in the wetland so as to ensure the normal growth of the vegetation.

The invention belongs to a fluid control device, and particularly relates to an interruption-rotating water granulation device of a reaction-type spraying nozzle. The interruption-rotating water granulation device is mainly composed of a damping sleeve, a spraying disk, a water distributing disk, a center shaft, a fixing gear disk and a supporting frame, wherein water distributing teeth are arranged on the outer side of the water distributing disk, and meshing teeth are arranged on the inner side of the water distributing disk. When the spraying nozzle works, a jetting flow impacts the water distributing teeth, and therefore the jetting flow is broken, short-jetting-range spraying is achieved, when the jetting flow deviates from the water distributing teeth, long-jetting-range spraying is achieved, the meshing teeth and upper teeth on the fixing gear disk interact, and interruption rotating of the water distributing disk is achieved. Through mutual matching of the spraying disk, the water distributing disk and the fixing gear disk, breakage of the jetting flow and the interruption rotating are achieved, finally, overlapping of the long jetting range and the short jetting range in different angles is achieved, and water amount distribution of the spraying nozzle under the low-pressure work condition is improved. The interruption-rotating water granulation device is simple in structure, reliable in operation, stable in working, and capable of improving distribution of the water amount of the spraying nozzle and improving spraying evenness under the condition that the jetting range is not reduced.

The invention discloses a galvanized steel reverse-flow type cooling tower. The galvanized steel reverse-flow type cooling tower comprises fixed supporting legs, a protective tower body, an air inletgrid, a rotating shaft, an impeller, a driving motor, a fixed frame, an exhaust grid, filler, a mounting frame, a supporting frame, a water collecting pipe, a conveying pipeline, water distributors, asilencing pad, a drainage hole and a drainage pipeline. The galvanized steel reverse-flow type cooling tower is characterized in that the water distributors are evenly arranged on the periphery of the water collecting pipe in the grid structure, so that the water distributors sufficiently distribute water flow in the water collecting pipe, and due to the fact that the filler is arranged to be made of the modified polyvinyl chloride material and is arranged to be of the circular structure, and then the diffusion quality of the filler on the water flow in the water distributors is effectively guaranteed; in addition, noise caused by direct contact between water flow passing through the filler and the inner wall of the protective tower body is avoided through the silencing pad, so that the water flow cooled by the filler is conveniently discharged through the drainage pipeline, and therefore the water flow cooling quality is effectively guaranteed.

The invention relates to a subsurface flow constructed wetland sewage treatment system by drop water aeration oxygenation, composed of drop water aeration subsurface flow constructed wetlands in one stage or multistage series. Each stage of drop water aeration subsurface flow constructed wetland comprises a bed body, an inflow barricade, an outlet barricade and a drop water baffle; wherein a plurality of deflectors, gravel fillers and emergent aquatic plants are arranged in the bed body between the inflow barricade and the outlet barricade. The invention is even in water distribution, small in wake space and uniform in water impact, residence time of sewage in the bed body is extended, blocking is difficult, thus being beneficial to improving effluent quality and biodegradation of microorganism on nutrient such as nitrogen, phosphor and the like in the sewage, and construction and running cost is low. The invention, under the joint action of the effects, can effectively degrade pollutant of urban and town domestic sewage, a small amount of industry waste water and farm drainage and is applicable to mountain land and hilly country with certain gradient.

A cleaning brush is provided. A cleaning unit comprises cleaning beans fixed on a surface of the carrier in a bi-spiral arrangement. The cleaning beans are arranged in an unequally-spaced manner on center of the carrier along a baseline; and, thus, bi-spirals are formed on the center and coiled in two different outward directions. Two annular spiral curve paths are formed with the cleaning beans as coiling the carrier and extending along the two directions. When the carrier cleans an electronic device, a solution or cleaning agent is discharged along the curve paths in spiral tangential directions. Hence, the bi-spiral cleaning unit obtains positive and negative directions on rotating to create a plurality of flow fields. Dirt is discharged easily with water distribution enhanced as compared to unidirectional spiral cleaning devices while a large contact surface, a good cleaning efficiency, and a high decontamination ratio are achieved.

The invention relates to the technical field of ecological environment restoration, specifically an intelligent ecological land irrigation and desert control restoration system, including a main water storage tank, a primary water storage tank and a secondary water storage tank; There is a deep well, and a lift pump for injecting water into the main water storage tank is placed in the deep well. A plurality of the primary water storage tanks are arranged around the main water storage tank and connected through irrigation devices. The sub-water storage tanks are arranged farther away from the main water storage tank. Through the setting of the land humidity sensor and the smart main board, the smart main board can coordinate the main water storage tank, the first-level sub-water storage tank and the second-level sub-water storage tank. The relationship between supply and demand between the tanks, irrigate the water-deficient areas when there is a water shortage, so as to optimize the water distribution, and can also maximize the water saving, so as to achieve the largest area of ​​irrigation with the smallest amount of water.

The invention discloses an externally connected straight-through phase change heat exchanging device, and belongs to the field of energy technologies. The problems that an existing phase change heat exchanging device is too large in size and inconvenient to transport, load and unload, and a liquid inlet mode and water distribution mode of an existing flash evaporator are prone to causing blockingare solved. The externally connected straight-through phase change heat exchanging device comprises N externally connected straight-through phase change heat exchanging single bodies, wherein N is greater than or equal to 1. Each externally connected straight-through phase change heat exchanging single body comprises a shell and a nozzle. Each shell is sealed and has a cavity structure inside. Each shell communicates with a vacuum pump. The inside of each shell is evacuated by the vacuum pump. The upper part of each cavity structure is provided with a heat exchange tube bundle, and the lower part of each cavity structure forms a flash chamber. Each nozzle communicates with the upper side wall of the corresponding flash chamber. Liquid to be flashed enters the flash chambers through the nozzles for flashing, steam obtained after flashing moves upward to the upper parts of the cavity structures and exchanges heat with liquid to be heated in the heat exchange tube bundles, so that the temperature of the liquid to be heated in the heat exchange tube bundles rises.

A membrane-electrode assembly for a fuel cell is provided. The membrane-electrode assembly includes a cathode electrode and an anode electrode which are positioned oppositely to each other; and a polymer electrolyte membrane positioned between the cathode electrode and the anode electrode. The cathode electrode and the anode electrode each includes an electrode substrate; a micropore layer which is positioned on the electrode substrate; and a first catalyst layer positioned on the micropore layer, at least one of a second catalyst layer is positioned between the first catalyst layer and the polymer electrolyte membrane, and the second catalyst layer includes a reaction inducing material which is a metal or alloy.

The invention discloses a novel membrane-free electrodeionization device structure. The structure comprises a composite top cover, a composite bottom cover, a cylindrical shell and an ion exchange resin layer, the composite top cover is arranged at the upper end of the cylindrical shell, the composite bottom cover is arranged at the lower end of the cylindrical shell, the composite top cover and the composite bottom cover have the same structure and are symmetrically arranged at two ends of the middle of the cylindrical shell, the cylindrical shell is filled with an ion exchange resin layer, the composite top cover and the composite bottom cover are compressed towards the middle of the cylindrical shell at two ends of the cylindrical shell to compress the ion exchange resin layer, the composite top cover / bottom cover comprises an upper interface, an upper cable sealing joint, a top cover plate, an upper electrode connecting rod, an upper porous pressing plate, an upper resin filteringplate and an upper electrode net. The resin layer can be uniformly pressed under the action of the composite top cover and the composite bottom cover, the upper resin particles and the lower resin particles are always in close contact, the adverse water flow distribution condition of the resin layer is effectively reduced, good resin regeneration is effectively guaranteed, the structure is simplified, and installation and maintenance are easy and convenient.

The invention discloses a high-sulfur free-cutting steel square billet continuous casting method. Molten steel comprising, by mass, 0.1-0.3% of C, 0.1-0.3% of S, 0.02-0.1% of Si, 1.0-1.5% of Mn, and the balance Fe and impurities is subjected to continuous casting through a continuous casting machine, and the section of a casting billet manufactured by the continuous casting machine is 250-350 mm wide and 400-500 mm high. According to the characteristics of the high-sulfur free-cutting steel continuous casting billet and the continuous casting machine, the casting speed of the continuous casting billet is reasonably controlled, the water distribution amount of a secondary cooling zone is optimized, the secondary cooling area is divided into a plurality of loops, the water amount of each loop is adjusted independently, the size of a columnar zone and the size of a center equiaxed zone of the continuous casting billet are controlled by changing heat transfer of all cooling zones, thus, the structure solidification process during continuous casting can be controlled, the high-sulfur free-cutting steel continuous casting billet is prevented from generating intercrystalline cracks and center cracks, the center equiaxed crystal ratio of the casting billet is increased, and center segregation and center porosity of the continuous casting billet are perfected.