76results about How to "Low initial investment" patented technology

The invention discloses a kind of coal mercury discharging control method which is based on semi-drying method. Sprays additive into the boiler smoke, oxidizes the elemetary mercury into mercuric oxide easy to remove; then sprays liquid including oxidant into smoke and oxidizes the mercury, and the temperature is decreased and forms the low temperature for high efficiency absorption; sprays absorption agent into cooled smoke, eliminates the mercuric oxide and mercury; the solid particle containing mercury is collected through electricity deduster or baggage dedusting device. The invention reduces the cost of operation.

The invention discloses a distributed synchronization solar energy street lamp control system comprising a photovoltaic cell array, a centralized control system, a storage cell array and an inverter, wherein the photovoltaic cell array and the storage cell array are respectively connected with the centralized control system connected with the inverter; and the alternating current output end of the inverter is connected with a street lamp sequenced power supply installed on a road. The centralized control system comprises a sensor subsystem and a principal computer control center subsystem, wherein the sensor subsystem comprises a sunlight sensor for detecting the illumination intensity of the street lamp working condition; the principal computer control center subsystem is used for controlling the photovoltaic cell array to convert solar energy into electric energy so as to store the electric energy in the storage cell array according to a signal collected by the sensor subsystem whenthe illumination intensity detected by the sunlight sensor is more than a preset threshold; and otherwise, the storage cell array is controlled to discharge and supply power for the street lamp sequence by the inverter. The distributed synchronization solar energy street lamp control system can improve stability, has high utilization ratio of the photovoltaic cell and the storage cell, lowers application cost and strengthens maintainability.

The invention discloses a method for preparing a coal smoke Hg-removing adsorbent, which comprises the following steps: a) adding the dipping acid into the water whose quantity is 1-2% of the water, b) adding the heptad manganese solid or solution to the liquor and stirring them to dissolve the manganese, c) adding acid diatomic manganese solution and stirring at the same time, d) adding the granular adsorbent and stirring 30-40 minutes, e) heating and drying them to the solid in the temperature 80-100 Deg.c, them grinding the solid to the powder, wherein the adding mass ratio of the heptad manganese, diatomic manganese and the granular adsorbent is 1: 1-2: 35-50.

The invention provides a diesel-gas-electric series-parallel type ship hybrid power system with a fuel cell. The diesel-gas-electric series-parallel type ship hybrid power system is composed of a diesel engine, a gas engine, electric generators, two motors, the fuel cell, a storage battery, permanent magnet couplers, two clutches, a gearbox, propellers, a natural gas storage and supply device, aninverter, a frequency converter, a rectifier and a distribution board. The diesel engine and the gas engine are connected with the gearbox through the permanent magnetic couplers, the two motors and the electric generators are connected with the gearbox through the clutches, the two clutches are arranged in the gearbox, and a power source includes the fuel cell and the storage battery. The layoutof various energy forms adopted by the diesel-gas-electric series-parallel type ship hybrid power system can meet the needs of ships in various environments and operating conditions, further improvesthe operating efficiency of the diesel engine, the gas engine and the motors, effectively reduces the fuel consumption and emissions of an engine, improves the dynamic response of the ships simultaneously, and the system has a wide range of application.

The invention aims at providing a gas-electric series-parallel type ship hybrid power system with a fuel cell. The gas-electric series-parallel type ship hybrid power system with the fuel cell comprises a gas machine, an electric motor and a power generator; the output end of the gas machine is connected with the first input end of a gearbox through a permanent magnet coupler; the output end of the electric motor is connected with the second input end of the gearbox through a first clutch; the input end of the power generator is connected with the first output end of the gearbox through a second clutch; the second output end of the gearbox is connected with a propeller; a liquefied natural gas tank is connected with a gas supply device; the gas supply device is connected with the gas machine and the fuel cell; the fuel cell, a storage battery, a ship load, an inverter and a rectifier are all electrically connected with a distributing board; the inverter is electrically connected with the electric motor through a frequency converter; and the power generator is electrically connected with the rectifier. According to the gas-electric series-parallel type ship hybrid power system withthe fuel cell, the operation efficiency of the gas machine and the operation efficiency of the electric motor are further enhanced, the fuel consumption and emission of the gas machine are effectivelyreduced, and the power response of a ship is improved.

The invention relates to an underground blasting energy-collecting ball, which comprises: blasting starter, drug, frame, and drug frame, wherein the blasting start point is at the top of center of drug; the drug frame is at the bottom of drug as taper, semi-ball or ball-cut shape; the invention is characterized in that: the drug frame is filled with waterproof foam plastic, to form the combination between foam and drug frame; the bottom edge of drug frame is sealed connected to the bottom plate of package. The invention has wide application, especially the underground reef, with low cost and simple operation.

The purpose of the invention is to provide a dual-shaft ship hybrid power system with a fuel cell. The system comprises a diesel engine, a gas machine, a fuel cell and a storage battery; the gas machine is connected to a first reversible shaft motor; the first reversible shaft motor is connected with a gear case; the diesel engine is connected with a second reversible shaft motor; the second reversible shaft motor is connected with the gear case; the gear case is connected with two propellers; a liquefied natural gas tank is connected with a gas supply device; the gas supply device is connected with the gas machine and the fuel cell; the fuel cell, the storage battery, a ship load, an inverter and a rectifier are all electrically connected with a distributing board; the inverter is connected to the first reversible shaft motor and the second reversible shaft motor through a frequency converter, and the first reversible shaft motor and the second reversible shaft motor are electricallyconnected to the rectifier. The invention can meet the requirements of the ship under various environments and working conditions, further improve the operating efficiency of the gas machine, the diesel engine and the reversible shaft motor, and effectively reduce the fuel consumption and emission of the engine.

The invention aims at providing a dual-shaft type gas-electric hybrid ship power system. The whole dual-shaft type gas-electric hybrid ship power system comprises a gas machine, a reversible shaft driven motor, a storage battery, a permanent magnet coupler, a clutch, a gearbox, a propeller, a natural gas storage and supply device, an inverter, a frequency converter, a rectifier and a switchboard.The dual-shaft type gas-electric hybrid ship power system is mainly characterized in that the gas machine is connected with the reversible shaft driven motor through the permanent magnet coupler; thereversible shaft driven motor is connected with the gearbox through the clutch; and the power source is the storage battery. According to the dual-shaft type gas-electric hybrid ship power system, theadopted layout of multiple energy forms can meet demands of a ship under various environments and working conditions, the operation efficiency of the gas machine and the reversible shaft driven motoris further enhanced, the fuel consumption and emission of the gas machine are effectively reduced, the power response of the ship is improved and the application range of the system is wide.

The invention aims to provide a gas-electric hybrid type ship hybrid power system with a super capacitor. The system comprises a gas machine, the super capacitor, a propeller, a natural gas storage and supply device and a ship load. The output end of the gas machine is connected with the input end of a gearbox, and the input end of a power generator is connected with the output end of the gas machine through a belt transmission transposition; the output end of the gearbox is connected with a motor, and the super capacitor, the power generator and a storage battery serve as power sources. The arrangement of various energy forms adopted by the system can meet requirements of ships under various environments and working conditions; the super capacitor is used for storing or releasing energy when the system load is changed so as to prevent the impact of the excessively quick energy change on a power grid, the operation efficiency of the gas machine, the power generator and the motor is improved, the utilization efficiency of fuel is improved, emission is reduced, the power response of the ships is improved, the application range of the system is enlarged, and the utilization rate of the fuel is further improved.

The purpose of the invention is to provide a gas-electric parallel ship hybrid power system with fuel cells. The system comprises a gas machine, a fuel cell, a reversible motor and a gear case; the gear case comprises an input end, an output end and an input / output end; the output of the gas machine is connected to the input of the gear case via a permanent magnet coupler; the output / input end ofthe reversible motor is connected to the input / output end of the gear case via a clutch, the output end of the gear case is connected to a propeller, and a LNG tank is connected to a gas supply device; the gas supply device is connected to the gas machine and the fuel cell, and the fuel cell, the battery, the ship load, the inverter, and the rectifier are electrically connected to a power distribution board, and the inverter is electrically connected to the reversible motor through a frequency changer, and the reversible motor is connected to the rectifier. The various energy forms arranged bythe invention can meet the requirements of the ship under various environments and working conditions, effectively reduce the fuel consumption and emissions of the gas machine, and improve the dynamic response of the ship.

The invention discloses an express-based intelligent accurate advertisement putting system and an express-based intelligent accurate advertisement putting method. The express-based intelligent accurate advertisement putting system comprises an express waybill printing platform control system and an advertisement platform control system, wherein advertisement information is input and stored in an advertisement information storage unit through advertisement information input equipment, the stored advertisement information is integrated to generate an advertisement information graph code by an advertisement information graph code generating unit in the advertisement platform control system when receiver information is input by receiver information input equipment, the advertisement information graph code can be one or a combination of several of a two-dimensional code, a bar code, a web link, characters, graphs and the like and can be transmitted to an express waybill printing server of the express waybill printing platform control system through the express waybill printing server, and express waybill printing equipment is controlled to print the receiver information and the advertisement information graph code to corresponding positions of an express waybill. The express-based intelligent accurate advertisement putting system disclosed by the invention has the characteristic ofintelligently and multi-dimensionally screening matched advertisement information and receivers, and the advertisement communication accuracy is greatly increased.

A method for efficiently fully leaching zinc from dust caused by making steel from waste galvanized plates comprises the following steps: (1) performing normal-temperature neutral leaching on zinc oxide dust to obtain a neutral leaching liquid and a neutral leaching slag; (2) performing high-temperature concentrated-acid leaching on zinc ferrite dust to obtain a high-temperature concentrated-acid leaching liquid and a high-temperature concentrated-acid leaching slag; (3) employing the high-temperature concentrated-acid leaching liquid as a leaching reagent to perform normal-temperature acidic leaching on the neutral leaching slag; and (4) employing the normal-temperature acidic leaching liquid as a leaching reagent to performing normal-temperature neutral leaching to obtain a neutral leaching liquid which is a finished product liquid. The method is easy to perform and easy for commissioning; and after the technology is modified, spent acid is fully utilized when the zinc source is effectively recovered, and also the iron ion content in the leaching liquid is reduced, so that the subsequent iron-removing processing cost is greatly saved.

The purpose of the invention is to provide a dual-engine dual-oar gas-electric hybrid ship power system. The whole system is composed of gas engines, reversible motors, a storage battery, a permanentmagnetic coupler, clutches, a gear case, a propeller, a natural gas storage and supply device, an inverter, a frequency converter, a rectifier and a distributing board. The main features of the systemare as follows: two gas engines are connected to the gear case through the permanent magnet coupler, and two reversible motors are connected to the gear case through the clutches, and the power source is the storage battery. The arrangement of various energy forms adopted by the invention can meet the requirements of the ship under various environments and working conditions, further improve theoperating efficiency of the gas machine and the reversible motor, and effectively reduce the fuel consumption and discharge of the gas machine. At the same time, the dynamic response of the ship is improved, and the system has a wide range of applications.

The purpose of the invention is to provide a gas-electric hybrid type ship hybrid power system with LNG cooling. The system includes a gas engine, a generator, motors and a natural gas storage and supply device. The gas engine is connected to a gear case through a shaft motor. The motors are connected to the gear case through clutches. The propellers are connected to the motors. An engine coolingsystem and a fuel cell cooling system are connected to an LNG gasification heat exchanger. An electric power source is a fuel cell, the generator and a storage battery. The gas-electric hybrid type ship hybrid power system with the LNG cooling can meet requirements of ships in various environment and working conditions through the adopted arrangement of a plurality of energy forms, improves running efficiency of the gas engine, the shaft motor and the motors, and utilizes LNG gasification cold energy so as to reduce the power of a heat dissipation fan and a liquid coolant circulating pump, reduce the area of a radiator and improve the integration of the system, further improves the utilization efficiency of fuel and reduces emission, thereby improving the power response of the ships, improves an application range of the system, and further improves the utilization rate of fuel.

The invention discloses a stereo sorting system based on an intelligent shuttle vehicle and an operation method thereof. According to the stereo sorting system based on the intelligent shuttle vehicleand the operation method thereof, a working mode of automatic seeding and sorting and scanning codes to examine goods are realized, so that the working efficiency and the accuracy rate of the warehousing and storage operation are improved. The warehousing space is fully utilized by a combined mode of the intelligent shuttle vehicle and a stereo storehouse, the manpower, the rent cost and the initial investment are reduced, and the operation procedure is improved. The stereo sorting system based on the intelligent shuttle vehicle and the operation method thereof assist enterprises to enter information and automation era.

The invention relates to a method for purifying polysilicon, and provides a solar-grade polysilicon purifying device and a solar-grade polysilicon purifying method. The purifying device is provided with a body insulating layer, an induction heating coil, a graphite heating sleeve, a graphite fixing disk, a lower insulating layer, a directional lifting device, a circulating water inlet / outlet, a graphite chassis, a crucible, an SiN coating and a thermocouple temperature measuring device. The purifying method comprises the following steps: placing the polysilicon and copper material into the crucible; melting the copper and the polysilicon to form a silicon-copper alloy fusant by switching on a power supply; measuring the temperatures at each point in the crucible along a vertical direction; adjusting an induction heating power controller so as to keep the alloy fusant in the crucible at a temperature gradient, namely the temperature is from high to low from the middle part to the bottom of the crucible; starting the directional lifting device so as to drive the crucible and the graphite chassis to be pulled down and generate directional solidification; cutting off the power supply after the alloy fusant is solidified; taking the silicon ingot of the alloy out after the solidified body is cooled and cutting the upper part of the silicon ingot; and obtaining the solar-grade polysilicon which is the rest part of the silicon ingot.

The invention provides a diesel electric parallel ship hybrid system with a fuel cell. The system is composed of a diesel engine, a gas machine, reversible motors, the fuel cell, a storage battery, apermanent magnet coupler, a clutch, a gear box, a propeller, a natural gas storage supply device, an inverter, a frequency converter, a rectifier and a power distribution board. The system is characterized in that the diesel engine and the gas machine are connected to the gear box through the permanent magnet coupler, the two reversible motors are connected to the gear box through the clutch, anda power source includes the fuel cell and the storage battery. The arrangement of various energy forms adopted by the system can meet the requirements of a ship under various environments and workingconditions, the operating efficiency of the diesel engine, the gas machine and the reversible motors is further increased, the fuel consumption and emissions of an engine are effectively reduced, shipdynamic response is improved, and the system has a wide application range.

The invention provides a microwave drying method. The microwave drying method comprises the following steps: placing a product to be dried in a sealing cavity of microwave drying equipment; performing microwave drying through the microwave drying equipment emitting microwaves and meanwhile performing forced convection on a gas in the sealing cavity; and monitoring the temperature of the gas in the sealing cavity and the surface temperature of the product to be dried, and at the same time performing post-treatment on the gas in the sealing cavity and enabling the gas after post-treatment to return to the sealing cavity in a cyclic manner. According to the microwave drying method and the device adopted by the same, the temperature and humidity of the gas medium in the sealing cavity are controlled on the basis of the conventional microwave drying technology, meanwhile the essence of the material drying principle is well utilized, so that the purpose of performing microwave drying by efficiently utilizing microwaves is achieved, and technological problems that materials are excessively dried, deformed, burned and denatured during the microwave drying process are effectively avoided; meanwhile, the microwave drying process is enhanced in an energy-saving manner through approaches such as complete moisture circulation and reutilization and cavity heat preservation. The invention further discloses the device adopted by the method, parts are easy to obtain, and the implementation is easy to realize.

The invention relates to technique and a device for dry dedusting of wet dust-laden gas in coking field. The technique employs the method of introducing hot air to improve the dew-point temperature of the highly wet dust-laden gas, so that the temperature of the mixed wet dust-laden gas can be higher than the dew-point temperature of the wet dust-laden, or the temperature of the mixed wet dust-laden gas can be higher than the dew-point temperature of the supersaturated wet dust-laden gas after the supersaturated wet dust-laden gas totally vaporizes, and enough time (1-20s) is ensured to enable the water films and other unbonded liquid drops on the surfaces of the dust particles to vaporize again. The technique and the device have the advantages that the technique and the device can effectively solve the problems that the filter-bag is bonded and the dedusting pipeline is jammed due to moisture condensation; the technique and the device enable high-efficiency filter dust catchers to be effectively applied in dedusting systems for various high moisture-content dust-laden gases for a long time and can satisfy high emission standard; and meanwhile, the technique is simple, practical, low in initial investment and operating cost and easy to popularize.

The invention discloses an automatic wood plate production system for packaged timber. The automatic wood plate production system comprises a first conveying belt (1), a microwave dryer (2), a double-decked glue sprayer (3), an air dryer (4), a transverse and longitudinal plate arranging machine (5), a discharging guide rail (7), a second conveying belt (2) and a hot pressing molding machine (9), wherein the microwave dryer (2), the double-decked glue sprayer (3), the air dryer (4) and the transverse and longitudinal plate arranging machine (5) are all arranged on the first conveying belt (1), the discharging guide rail (7) is arranged at the bottom of the transverse and longitudinal plate arranging machine (5), the second conveying belt (2) is arranged right above the discharging guide rail (7), and the hot pressing molding machine (9) is arranged at one end, away from the discharging guide rail (7), of the second conveying belt (2). The automatic wood plate production system has the advantages of being high in production efficiency, low in initial investment and low in design and production inputs, and a production line is simple in structure.

The invention discloses a preparation method of TiO2 nanometer fibers and belongs to the field of chemistry. The preparation method of the TiO2 nanometer fibers has the advantages of low cost, simple reaction conditions and high product quality. The preparation method is characterized by comprising weighing and dissolving PVP in 10-40ml of anhydrous ethanol, carrying out stirring at a room temperature to obtain a uniform solution, pouring 2-8ml of a mixed solution of tetrabutyl titanate and acetic acid into the PVP solution according to a volume ratio, carrying out magnetic stirring for 2-8h to obtain a PVP-TiO2 precursor solution because of tetrabutyl titanate hydrolysis, preparing a PVP-TiO2 composite fiber non-woven fabric with diameter of about 300-600nm, taking off the composite fiber non-woven fabric, putting it into a muffle furnace, keeping a temperature of 90 DEG C for 8-20h, carrying out heating at a heating rate of 150 DEG C / h, and respectively keeping the temperature of 550 DEG C, 800 DEG C and 990 DEG C for 5-10h to obtain the TiO2 nanometer fibers.

The invention provides a single-engine single-propeller type gas-electric hybrid ship power system. The single-engine single-propeller type gas-electric hybrid ship power system comprises a gas engine, a storage battery and a gearbox, the output end of the gas engine is connected with the input end of the gearbox through a permanent magnet coupler, the output / input ends of a reversible motor are connected with the input / output ends of the gearbox through a clutch, and the output end of the gearbox is connected with a propeller. A liquefied natural gas tank is connected with a gas supply devicein a gas mode, the gas supply device communicates with the interior of the gas engine, the storage battery, ship load, an inverter and a rectifier are all connected to a distribution board, the inverter is connected with the reversible motor through a frequency converter, and the reversible motor is electrically connected with the rectifier. The layout of various energy forms adopted by the single-engine single-propeller type gas-electric hybrid ship power system can meet the needs of ships in various environments and operating conditions, further improves the operation efficiency of the gasengine and the reversible motor, effectively reduces fuel consumption and emission of the gas engine, improves the dynamic response of the ships simultaneously, and the system has a wide range of application.

The invention discloses a mobile steady-water-outflow pipe-dragging fertilization and irrigation device comprising a frame (2). The device is characterized in that at least travelling wheels (1) and a main water pipe (3) are arranged on the frame (2). The main water pipe (3) is provided with a plurality of water-guiding pipes (4). One end of each water-guiding pipe (4) is connected with the main water pipe (3), and the other end of each water-guiding pipe (4) is provided with a blind pipe (6). Each blind pipe (6) is a tubular body with two ends opened and the pipe wall sealed, or with one end opened and with the pipe wall being water-permeable. A water-stabilizing device is arranged between the water-guiding pipe (4) and the blind pipe (6). Compared with prior arts, the device provided by the invention has the characteristics of low initial investment and low maintenance cost. With the device, drip irrigation tape recovery cost can be reduced.

The invention discloses a Supercritical CO2 fluid cooperative biological in-situ leaching uranium mining method. First, a uranium ore is pre-acid-leached by injecting organic weak acid citric acid into an ore layer, metal uranium is dissolved from mineral by using a method that a functional group of the citric acid forms a compound and chelate with metal uranium ions, then acclimated thiobacillusferrooxidans is injected into an acidified ore body as an oxidizing agent, Fe2+ in ore is oxidized to Fe3+, then Fe3+ is used to oxidize U4+ insoluble to acid soluble U6+, and finally a highly solubleuranyl carbonate complex is formed with an injected supercritical CO2 fluid. Therefore the concentration of the metal uranium in a leaching solution and the leaching efficiency of the metal uranium are improved, the leaching time is shortened, no side effect exerts on the environment, meanwhile, the use of citric acid can further reduce the precipitation of calcium, magnesium, iron and the like in the leaching solution, and the contact area between a leaching agent and the uranium ore in the subsequent leaching process is increased, so that continuous carrying out of a leaching reaction is facilitated.

The invention discloses a zinc electrolyzing and recycling device and a processing method and relates to solar polysilicon. The zinc electrolyzing and recycling device is provided with an electrolytic bath, a rectifier, a low-order liquid collecting tank, a heating tank, an anti-acid pump and a high-order tank. The anode and the cathode of the electrolytic bath are connected with the output end of the rectifier, the electrolytic bath is connected with the low-order liquid collecting tank and the heating tank respectively, and the low-order liquid collecting tank is connected with the high-order tank which is connected with the heating tank. After being electrolyzed and heated, the silicon is arranged in a crucible and mixed with germanium to be arranged in a furnace; a furnace room is vacuumized and connected with a heating power supply, so that the silicon in the crucible is heated gradually until all the silicon is melted; and by the directional solidification, the silicon is solidified gradually from the bottom to the top so as to form the directional solidification polysilicon.

The purpose of the invention is to provide a gas-electric parallel ship hybrid power system with LNG cooling. The system includes gas engines, a reversible motor, a fuel cell and a storage battery. The two gas engines are connected to input ends of a gear case through clutches. The reversible motor is connected to the gear case through a clutch. A propeller is connected to an output end of the gear case. An engine cooling system and a fuel cell cooling system are connected to an LNG gasification heat exchanger. The gas-electric parallel ship hybrid power system with LNG cooling can meet requirements of ships in various environment and working conditions through the adopted arrangement of a plurality of energy forms and a plurality of working modes, improves running efficiency of the gas engines and the reversible motor, and utilizes LNG gasification cold energy so as to reduce the power of a heat dissipation fan and a liquid coolant circulating pump, reduce the area of a radiator and improve the integration of the system, thereby improving the utilization efficiency of fuel, reducing emission and improving an application range of the system.

The invention discloses a wireless gas meter reading system. The wireless gas meter reading system comprises a teletransmission terminal gas meter, a wireless meter reader, a mobile phone meter reading application platform, a data center and charge management software. The teletransmission terminal gas meter is connected with the wireless meter reader through a wireless network, the wireless meter reader is connected with the mobile phone meter reading application platform through a wireless and / or wired network, the mobile phone meter reading application platform is connected with the data center through the Internet network, and the data center is connected with the charge management software. By means of the wireless gas meter reading system, remote wireless automatic meter reading can be achieved, and a gas company can carry out the remote operation management of meter reading, gas selling, price adjustment, valve switching and the like on gas meters of users. The system is simple in structure and low in initial input; system operation and maintenance are easy and convenient; system operation cost is low; the system has a wide range of application objects, application of the system is not limited to centralized reading of gas meters, and the system can also be applied and popularized to centralized reading of water meters, electricity meters and other household meters.

The invention discloses a lithium bromide absorptive cold and hot water air-conditioner system directly driven by solar energy, which comprises an absorptive refrigeration system (200) and a chilled water energy storage loop (300), wherein the absorptive refrigeration system (200) is connected with the chilled water energy storage loop (300); and the air-condition system also comprises a solar heat collection system (100) which is connected with the absorptive refrigeration system (200). According to the cold and hot water air-conditioner system, a solar heat collection system is additionallyused as a heat source for enabling the unit to work normally at the same time of preserving the original heat source loop as an auxiliary drive heat source loop of the absorptive refrigeration system, and all loop structures of the absorptive refrigeration system are properly adjusted. The air-conditioner system has the advantages that: the solar heat collection system which integrates a solar heat collector and a high-temperature generator is adopted in the system, so that the refrigerating system is changed from a lithium bromide dual-effect absorptive refrigerating system to a lithium bromide triple-effect absorptive refrigeration system under the condition of not improving the temperature of the heat source, and the thermodynamic coefficient of the system is greatly increased, therefore the initial investment is reduced.

The invention discloses a direct cooling water system for cooling machines. The direct cooling water system is characterized in that a cooling water pipe (2) extends into a cooling-machine barrel through a hole arranged on a tail cover (4), and the part of the cooling water pipe (2), which is in the barrel, is provided with a nozzle (5); and the part of the cooling water pipe (2), which is outside the barrel, is connected with a pulley (3), and the pulley (3) is arranged on a guide rail (1). The invention provides a direct cooling water system for cooling machines used in the chemical industry, the cement engineering and the metallurgical engineering and the like; the direct cooling water system is simple in structure; through adoption of the direct cooling water system, the initial investments of factories can be reduced, the installation of equipment and the operation of workers are facilitated, and operation and maintenance cost can be lowered.

The invention discloses a natural gas supply system for a high-power LNG-diesel oil dual-fuel engine. The natural gas supply system comprises a storage system, a supply system and a control system, wherein the storage system is connected with the supply system; the supply system is simultaneously connected with the storage system and the engine; and the control system communicates with the storage system, the supply system and the engine respectively. The natural gas supply system disclosed by the invention has obvious economical and social benefits, can save a lot of fuel cost for an enterprise and also can greatly reduce the exhaust pollution of the engine.