38results about How to "Reduce overall energy consumption" patented technology

The invention discloses an experiment teaching system based on a cloud desktop. The experiment teaching system based on the cloud desktop comprises a virtualized server resource pool, wherein a plurality of physical servers are arranged inside the virtualized server resource pool; each physical server is provided with a plurality of virtual machines; a cloud desktop experimental terminal is connected with the physical servers in the virtualized server resource pool through a desktop net interchanger; a main management server is connected with the physical servers through a management net interchanger and is further connected with the desktop net interchanger; a storage server is connected with the physical servers through a storage net interchanger; the physical servers is connected with at least one application server through an application net interchanger. The cloud desktop remote access and the virtual machine technology are utilized, hardware cost and maintenance cost are effectively lowered, and the resource utilization rate is improved. The cloud desktop experimental terminal is low in configuration demand and high in universality and flexibility. The standardization and refinement of the experiment teaching process are improved, safety is high, and the supervision and administration capacity of experiment teaching is enhanced.

A precision forging technology of tooth forms of duplex straight toothed spur gears is characterized in that a forging technology and a closed forging die are used to manufacture all the tooth forms of two-stage step cylindrical gears of a duplex straight toothed spur gear; according to the forging technology, a round cake blank is used for one-time heating, all the tooth forms are forged and formed at a time, the forging die structure for precision die forging is of a closed impression structure, a tooth-form female die is of a big-end-up split structure, a die upper punch is a split tooth-form male die, a die lower punch is a tooth-form cushion type die and also serves as an unloading die, and the dies are guided and positioned through four sets of guiding pillars and guiding sleeves. The technological process of forging includes the steps that material is prepared and heated, forging is performed on a no-bottom-dead-centre screw press or a die forging press with the closed impression forging die, hot forged pieces are inspected and cooled, two end faces and inner holes are mechanically machined, gear products are subjected to cementation heat treatment, the gear products are finally inspected, and products are packaged and put in storage.

The invention provides a composite solvent for extracting, rectifying and separating styrene from hydrocarbon mixtures. The composite solvent comprises a main solvent accounting for 62 to 90 percent of the total mass and a cosolvent accounting for 10 to 38 percent of the total mass, wherein the main solvent is selected from sulfones compounds, pyrrolidone compounds, glycol compounds or a mixture of any two or three among the compounds, and the cosolvent is selected from C9-C12 aromatic hydrocarbon, amide containing 2 to 6 carbon atoms or the mixture of the aromatic hydrocarbon and the amide. When the composite solvent is used for extracting, rectifying and separating styrene in hydrocarbon mixtures, the temperature of the bottom of an extractive distillation tower and a solvent recovery tower can be effectively lowered, and the comprehensive energy consumption during extraction is reduced.

The invention relates to a method for separating glycol and butylene glycol, and mainly aims to solve the problem of high separation energy consumption in separation of glycol and butylene glycol through azeotropic rectification. The method comprises the steps of: putting a glycol solution with butylene glycol content higher than 1% and a strippant into the raw material feeding bed and the strippant feeding bed of a simulated moving bed instrument loaded with an adsorbent, with the extraction solution mixed by the strippant and butylene glycol, and the raffinate mixed by the strippant and glycol, subjecting the extraction solution to separation in a butylene glycol separation tower, recovering the strippant from the tower top, and collecting butylene glycol from the tower kettle, delivering the raffinate into a glycol separation tower, recovering the strippant from the tower top, and collecting glycol from the tower kettle, with the adsorbent selected from at least one of nonfunctional resin or a molecular sieve, and the strippant selected from at least one of polar solvents. The technical method provided in the invention solves the problem well, and can be used in industrial production of glycol and butylene glycol separation.

The invention discloses a method for significantly reducing the comprehensive energy consumption of air separation, which comprises the following steps: feeding large amount of nitrogen pumped from the top of a lower tower into a heat exchanger for reheating and serving as pressure nitrogen products, allowing the rest nitrogen to enter a condenser-evaporator and condensing the rest nitrogen into liquid nitrogen; introducing part of the condensed liquid nitrogen serving as liquid nitrogen products, or pumping large amount of liquid nitrogen for internal compressing and reheating and then using the compressed and reheated liquid nitrogen as medium-pressure products. Because all nitrogen products are from the pressure nitrogen or internally-compressed liquid nitrogen pumped from the top of the lower tower, and the pumped amount is large, but not from the compressed low pressure nitrogen pumped from an upper tower, the pressure nitrogen is fully pumped, the rectification potentials of the upper and lower towers are fully utilized so as to reduce the energy consumption of air separation. Moreover, the backflow liquid of the top of the upper tower is pumped from the liquid nitrogen fraction on the upper part of the lower tower, which can further improve the rectification capacity of the upper tower, and reduce the energy consumption of air separation devices and the content of argon in nitrogen products. The process flow is characterized by optimum process organization, low investment cost of equipment and significant energy consumption reduction.

The embodiment of the invention relates to the technical field of heterogeneous edge computing networks, and in particular relates to a design method and system for layered task unloading in a heterogeneous mobile edge computing network, a storage medium and equipment. The method comprises edge equipment, an edge server and a cloud computing center; the edge equipment judges whether to unload a task or not according to the price fed back by the edge server and the locally calculated energy consumption; the edge server judges whether to unload the task or not according to the price fed back bythe cloud computing center and the locally calculated energy consumption; the cloud computing center adjusts the price according to the minimized energy consumption of the whole computing network; andthe steps are cycled until the unloading strategy of the edge equipment, the decision strategy of the edge server and the price and penalty of the computing resources published by the cloud computingcenter are stable. According to the method, the energy consumption minimization in the whole computing network in the distributed system is realized through a price and penalty mechanism, and the overall energy consumption is effectively reduced; and the penalty rate is set to reduce the probability of system blockage.

The invention discloses a reverse osmosis strong brine concentration method and equipment. The concentration method comprises the following processes of (1) a positive osmosis concentration process: using reverse osmosis strong brine as raw material liquid, so that the water in the raw material liquid passes through a positive osmosis film to enter the liquid suction side through the effect of suction liquid, salt in the raw material liquid is intercepted at the raw material liquid side, and the raw material liquid can be concentrated; (2) a film distillation concentration process: conveying the raw material liquid concentrated in the step (1) to a hot side of a film distillation film; performing cooling by circulation water at the cold side of the film distillation film or vacuum suction,so that the water at the hot side passes through the film distillation film in a water vapor form to enter the cold side, the raw material liquid at the hot side loses water, and the raw material liquid is further concentrated. The concentration equipment comprises a positive osmosis device, a film distillation device and a strong brine tank. According to the concentration method and equipment, the positive osmosis is used as the film distillation pretreatment technology to perform deep concentration on the reverse osmosis strong brine, so that the whole energy consumption is reduced; the treatment of the reverse osmosis strong brine and the subsequent resource utilization are realized at low energy consumption and high concentration efficiency.

The invention relates to a method for synthesizing n-butyl acetate. The method comprises the following steps: contacting acetic acid and n-butyl alcohol under the synthetic reaction conditions of n-butyl acetate and in the presence of a catalyst, and recovering to obtain the n-butyl acetate. The method is characterized in that the active ingredient of the catalyst refers to a molecular sieve which is formed by hydrothermal crystallization synthesis and of which the pore passage contains an organic template agent. The method has the advantages of high acetic acid conversion rate, high n-butyl acetate selectivity, energy conservation and environment friendliness.

The invention discloses an air separation fractionating tower system and a technology utilizing the air separation fractionating tower system to prepare low-purity oxygen. The pressure air is subject to heat exchange by a main heat exchanger and a liquid oxygen evaporator and is converted into partially liquefied air, then the air is separated into oxygen-rich liquid air and nitrogen in a lower tower of the fractionating tower, and the oxygen-rich liquid air enters an upper tower of the fractionating tower; the nitrogen is cooled into liquid nitrogen in the condensing evaporator, and is sent into the upper tower of the fractionating tower through an overcooler; each material in the upper tower of the fractionating tower is separated into low-purity liquid oxygen and nitrogen, and the low-purity liquid oxygen is subject to heat exchange and gasifying with the nitrogen at the lower part of the lower tower of the fractionating tower in the condensing evaporator, is subject to heat exchange by the condensing evaporator and the main heat exchanger, and is sent out as a product; the low-purity liquid oxygen is also subject to heat exchange by the liquid oxygen evaporator and the main heat exchanger, and is sent out as the product. The air separation fractionating tower system has the advantages that the low-purity oxygen and high-purity oxygen with different purities and pressures can be simultaneously produced, the operation pressure is low, the extraction rate is high, the energy consumption is little, the equipment investment is low, the requirements of low-purity oxygen and high-purity oxygen in multiple industries can be well met, and the air separation fractionating tower system is suitable for industrial production.

The invention provides a preparation method of a lithium iron phosphate positive electrode active material, comprising: (1) firstly mixing a lithium source, an iron source and a doped element source,then sequentially adding a phosphorus source and a carbon source, uniformly mixing to obtain a mixed material; the mixture is placed in a double-cone dryer under solvent-free conditions, and the mixture is dried in a temperature range of 150 DEG C to 400 DEG C, and that heat preservation is performed for 8-12h to obtain dry material, crushing and refine that dry material by adopting a jet mill toobtain powder particles having a primary particle size of 100-200 nm; 2, sintering that powder particle to obtain a primary sintering material under a protective atmosphere, and crushing and refine the primary sintering material by a gas flow crusher to obtain a lithium iron phosphate positive electrode active material. The preparation method comprises the following steps of: adding raw materialsrequired for synthesizing lithium iron phosphate in a certain order without using a solvent; and sintering the raw materials in one step to obtain an end product with uniform size and excellent performance. The preparation method has the advantages of simple process, low energy consumption and environment friendliness.

The invention provides a passive four-path RS232 serial port concentrator. The passive four-path RS232 serial port concentrator is designed according to the problem of a requirement of an existing device for an externally-connected power source. The passive four-path RS232 serial port concentrator of the invention includes an input and output interface module, a serial port electricity taking module, a single-chip microcomputer and a four-path analog switch, wherein the input and output interface module is used for receiving and transmitting serial port signals and dividing the received signals into three paths and transmitting the three paths of signals to the other three modules, the serial port electricity taking module converts one path of signals into 3.3V stable voltage and outputs the 3.3V stable voltage to the single-chip microcomputer and the four-path analog switch so as to provide work voltage for the single-chip microcomputer and the four-path analog switch, and the single-chip microcomputer detects signals of four interfaces and controls the channels of the four-path analog switch, so that one-to-many communication of serial ports can be realized. The baud rate of data communication ranges from 300 to 115200Bd.

The invention belongs to the technical field of nitrogen making and relates to an ultralow-energy consumption nitrogen making device. Air sequentially passes an air filter, an air compressor, a waste nitrogen heat exchanger, a water cooler, a pre-cooling unit, a molecular sieve purifier and a main heat exchanger and directly enters the bottom of a rectifying tower or is expanded and pressurized through a pressurizing turbine expanding machine and then enters the bottom of the rectifying tower, oxygen-enriched liquid air is obtained at the bottom of the rectifying tower, the oxygen-enriched liquid air passes a liquid-air subcooler, is throttled and fed to the top of a condensing evaporator, the oxygen-enriched liquid air exchanges heat with nitrogen and forms liquid nitrogen at the condensing evaporator, the liquid nitrogen flows back to the top of the rectifying tower to serve as the reflux of the rectifying tower, high-purity nitrogen is obtained at the top of the rectifying tower, the high-purity nitrogen is output to the outside through the main heat exchanger, and another path of high-purity liquid nitrogen is output to the outside through a nitrogen subcooler. The ultralow-energy consumption nitrogen making device is low in tower pressure and suitable for nitrogen making in nitrogen making industries, energy consumption can be reduced by 30%, and the air moisture content is low.

The invention relates to a low-power-consumption intelligent door lock. The low-power-consumption intelligent door lock comprises a door lock control MCU, a capacitance touch keyboard, a fingerprint sensor, a non-contact IC card antenna, a BLE module, a voice playing module, an OLED display screen, a door lock motor driving module, a battery capacity monitoring module and a door handle switch sensor, and further comprises a loudspeaker, a door lock motor and a battery. A low-power-consumption standby method comprises the steps that (1) the door lock is closed; (2) after 5 seconds, the BLE module, the voice playing module, the OLED display screen, the door lock motor driving module and the battery capacity monitoring module are turned off, and the capacitance touch keyboard, the fingerprintsensor and the non-contact IC card antenna are reserved to be turned on; (3) when the door lock control MCU monitors the situation that the door handle switch sensor does not transmit a signal for continuous 48 hours, the capacitance touch keyboard, the fingerprint sensor and the non-contact IC card antenna are turned off; (4) during door opening, the handle switch sensor transmits the signal tothe door lock control MCU, and the capacitance touch keyboard, the fingerprint sensor and the non-contact IC card antenna are turned on; and (5) the door lock is opened.

The invention provides a water chilling unit operation control method. The water chilling unit operation control method comprises the steps of obtaining an energy consumption model of each of at leastone water chilling unit, wherein the energy consumption models are used for representing the relation between energy consumption of the water chilling units and operation parameters of the water chilling units; determining a total energy consumption model of the at least one water chilling unit based on the energy consumption models of the water chilling units, wherein the total energy consumption model is at least used for representing the relation between total energy consumption of the at least one water chilling unit and the operation parameter of each water chilling unit; determining anoptimized target value of the operation parameter of each water chilling unit according to the total energy consumption model and the total load of the at least one water chilling unit to enable the total energy consumption to meet the optimization condition; and adjusting the operation parameter of each water chilling unit according to the optimized target value. The invention further provides awater chilling unit operation control system, an electronic device and a computer readable storage medium.

The invention discloses a wireless sensor network routing method, which relates to the technical field of wireless sensor network communication. The wireless sensor network routing method comprises the steps of: establishing a pressure gradient function according to relative distance among a current node, neighbor nodes and a convergent node; establishing a specific resistance function by utilizing the length of a current buffer queue of the nodes and predicted traffic; establishing a inter-node link traffic model according to the established pressure gradient function and the established specific resistance function; and selecting the neighbor node with maximum link traffic as a next-hop node, thereby completing the establishment of route. The wireless sensor network routing method utilizes the concepts and mechanisms of hydraulics, effectively controls network congestion, reduces total energy consumption of the network, improves overall throughput of the network, and has low packet loss rate and time delay.

The invention provides a water affair intelligent scheduling parameter solving method and system based on a multi-layer consensus mechanism. According to the method and the system, the phenomena of data non-circulation and data islanding in the whole process of joint scheduling of multiple water supply main bodies are solved by utilizing distributed nodes. A digital certificate is issued to each node and a public key and a private key for encrypting data are configured through a CA authentication link, so that the security of an alliance chain is improved. A multi-layer consensus mechanism is adopted, a first layer of consensus deeply fuses a DPOS consensus algorithm in a block chain technology with an actual production environment, response can be quickly carried out, and the computing power is saved. And the second layer of consensus converts a difficult problem needing to be solved in the block chain network into a flexible and adjustable valuable mathematical problem closely related to production practice from all node consensus participating in the block chain through a POW consensus algorithm, and the calculation overhead of each node is reasonably utilized. And through joint calculation and solution of all nodes, scheduling parameters meeting water supply requirements are obtained, and comprehensive energy consumption is reduced.

The invention discloses a system for recovering waste heat during dry capture of CO2 for thermal power stations and using the waste heat for heat supply. The system comprises a carbon capture unit andan extraction steam heating unit. The invention adopts the low-temperature heat network backwater as the cooling medium for cooling the carbonation reactor in the carbon capture unit, and realizes the recycling of a large amount of low-grade heat released during the adsorption process; the regeneration gas at the outlet of the regenerative reactor is used to replace the low-temperature regenerator in the carbon capture unit to heat the condensed water, recover the cooling heat of the regeneration gas, and reduce the low-pressure extraction of the carbon capture unit; part of exhaust heat of steam turbines in the heating unit is recovered by the absorption heat pumps. The invention combines the advantages of low temperature dry capture CO2 technology and absorption heat transfer technologyto recover waste heat during carbon capture. At the same time, power generation, CO2 capture and central heating are realized, which is in line with the principle of energy cascade utilization, and the whole system has good economy.

The invention discloses an oil and gas recovery system. The system comprises a plurality of condensers which are in successive connection and are gradually increased in refrigeration level, and an oil and water collector which is connected with the condensers; in addition, the system also comprises an oil and gas pretreatment device which is connected with and arranged between an oil and gas pipeline and the condensers; meanwhile, the oil and gas pretreatment device comprises a shell 1, wherein the top end of the shell 1 is provided with an oil and gas inlet and a tail gas outlet 1; the interior of the shell 1 is provided with a filter unit; a heat-exchange unit is arranged below the filter unit; a gas inlet and a gas outlet of the heat-exchange unit are connected with a condenser compressor; and the bottom end of the shell 1 is provided with a sewage discharge pipe which is connected with an external sewage pool. The oil and gas recovery system can greatly reduce overall energy consumption, lower operation cost, effectively decrease emission concentration and improve recovery rate.

The invention discloses a return air defrosting control method for an air-cooled full refrigerated container. The return air defrosting control method for the air-cooled full refrigerated container comprises the following steps that S1, a controller calculates the continuous running time t1 of a compressor, if t1 is greater than or equal to ta, the compressor stops running and the step S5 is executed, and if t1 is smaller ta, the compressor continues running until a refrigerating chamber reaches the shutdown temperature, the compressor stops running and the step S2 is executed; S2) the openingtimes K0 of a refrigerating chamber door in a first defrosting period is calculated, and the opening times K0 is compared with the defrosting target time table of the opening times to obtain the defrosting target time tm of the current opening times; S3) the cumulative running time t2 of the compressor in the first defrosting period is detected, if t2 is greater than or equal to tm, the step S5 is executed, and if t2 is smaller tm, the step S4 is executed; S4) a fan is kept running until the temperature T0 of a defrosting temperature sensing head is greater than or equal to Tmb, and the stepS6 is executed; S5) the fan is kept running until the temperature T0 of the defrosting temperature sensing head is greater than or equal to Ta, the step S6 is executed; and S6) the fan stops running.According to the return air defrosting control method for the air-cooled full refrigerated container, defrosting is conducted after the compressor is stopped, defrosting is conducted through heat return, the interior of the refrigerator is continuously cooled through residual cold of an evaporator, and energy consumption of the whole refrigerator can be reduced.

Provided is a green data center temperature-aware server management strategy, which is characterized by carrying out data center energy consumption modeling and setting constraint conditions, wherein modeling comprises server system energy consumption modeling and refrigerating system energy consumption modeling, and the constraint conditions comprise a user service quality constraint and a server temperature constraint; and under the constraint conditions, sum of server system energy consumption and refrigerating system energy consumption is allowed to be minimum. The invention also provides a specific temperature and server management solution algorithm. Compared with an existing green data center energy-saving algorithm, the green data center temperature-aware server management strategy has the advantages that a machine room refrigerating system is included in an energy consumption model, and refined description of data center total energy consumption is realized; then, the algorithm ensures user service quality and server CPU temperature; and finally, through main decomposition technology, the data center total energy consumption minimization problem is decomposed into a temperature control regulator part and a user resource distribution agent part, a high-extendibility distributed algorithm is provided, and the data center total energy consumption is reduced effectively.

The invention discloses an intelligent-control medium-deep-depth geothermal non-interfering heating system capable of achieving whole-process energy saving. A buried tube heat exchanger is arranged ina geothermal well, a ground source side water pump communicates with the buried tube heat exchanger and communicates with a user side water pump through a heat pump host for heat exchanging, the userside water pump communicates with an indoor space of a user side, an energy-saving intelligent control system is connected with the ground source side water pump, the user side water pump and the heat pump host through a first variable frequency cabinet, a second variable frequency cabinet and a heat pump unit control system correspondingly, a temperature sensor is arranged in the indoor space ofthe user side, a pressure sensor is arranged at the most unfavorable tail end of the user side, and the energy-saving intelligent control system integrally adjusts the power of a unit water pump. Through the technical scheme, medium-deep-depth geothermal non-interfering clean utilization is achieved, the minimum total energy consumption of all main power consumption equipment is achieved, and meanwhile the stability, reliability and user comfort of the geothermal heating system are ensured.

The invention discloses a PTA (pure terephthalic acid) hydrogen extraction tail gas catalytic oxidation and methanol hydrogen production co-production process, which solves the problems that heat in PTA tail gas cannot be reasonably utilized, and the environment is greatly polluted, the tail gas generated in the methanol hydrogen production process and the tail gas after PTA hydrogen extraction enter a reactor, the reactor is connected with a heat conduction oil pipe, and the heat conduction oil pipe is communicated with the heat conduction oil pipe. The residual tail gas generated after methanol hydrogen production and the tail gas generated after PTA hydrogen extraction are subjected to a catalytic reaction with air entering the reactor in the reactor to generate carbon dioxide and water, heat is released, the released heat is used for heating flue gas, the heated flue gas is used for heating oil in the heat conduction oil pipe, and the oil in the heat conduction oil pipe is heated. And the heated conduction oil supplies heat to the vaporization superheater and the converter. The hydrogen production PSA tail gas catalytic oxidation reaction is utilized to form an independent catalytic reaction system, a steam heating system is not additionally adopted, catalytic reaction gas is directly adopted to heat conduction oil, then heat is provided for hydrogen production, and the energy-saving and environment-friendly effects are achieved.

The present invention relates to automatic adjustment of a position relationship between a motor vehicle's (110) chassis element (119) and at least one wheel pair (113; 114a, 114b) of the vehicle (110). A control unit (117) receives a target value (hT) and a measured value (h) expressing the position relationship between the chassis element (119) and the at least one wheel pair (113; 114a, 114b). Based thereon, the control unit (117) produces a first control signal (C1), which influences an input air flow from a pneumatic pressure source system (115; 116) to a pneumatically operated control mechanism, such that the a position relationship is varied. The pressure source system (115; 116) produces a system pressure (PS), and a pressure sensor means (111) registers a pressure parameter indicative of the system pressure (PS). Furthermore, the control unit (117) compares the measured value (h) with the target value (hT), compares the system pressure (PS) with at least one pressure limit (Pco1; Pco2 ), investigates whether one of at least two decision criteria is fulfilled. Upon fulfillment of such a criteria, the control unit (117) controls the system pressure (PS) to a predefined level by means of a second control signal (C2). The predefined level depends on which decision criterion that is fulfilled.

The invention discloses a thermal power plant load optimal distribution system platform based on AGC (Automatic Gain Control), which relates to the technical field of thermal power plant plant-level load scheduling and comprises an AGC control terminal, a unit performance management unit, a unit guidance optimization unit, a load instruction distribution unit and a load optimization analysis unit, the AGC control terminal distributes a power grid AGC adjustment / distribution instruction to each unit of a thermal power plant, the unit performance management unit evaluates the operation performance of boilers and steam turbines in the units, and the unit guidance optimization unit is used for providing operation guidance parameters for the boilers and steam turbines in the units for operators to achieve the purpose of optimization. According to the thermal power plant load optimal distribution system platform based on AGC, performance management analysis is carried out on the operation condition of each unit, and unit operation guidance parameters are given to reasonably carry out optimal combination and load distribution of each unit, so that the total energy consumption of a thermal power plant is minimized on the premise of satisfying a planned total load value.

The invention relates to a DVFS-based network video on demand server and application thereof. The network video on demand server comprises a processor, a storage hard disk, an index monitoring module and a random access memory, wherein the processor is used for processing an on-demand request of a user and transmitting a video on demand; the storage hard disk is used for storing a video source on demand of the user; the index monitoring module is used for monitoring operating state indexes of the server; the random access memory is used for performing DVFS adjustment on the processor according to monitored data of the index monitoring module; the processor is a multi-core processor based on DVFS, and is connected to the Internet network by means of an Ethernet interface; the Internet network is connected with a user terminal used for video on demand by the user; the random access memory is connected with the index monitoring module; and the processor is connected with the storage hard disk and the random access memory separately. Compared with the prior art, the DVFS-based network video on demand server and the application thereof can effectively reduce the overall energy consumption of the network video on demand server while satisfying video on demand.

The invention discloses a heavy oil / residual oil / coal tar catalytic cracking-polymerization reaction lightweight device and a method thereof, and belongs to the oil refining, petrochemical engineering, coal chemical industry field. According to the invention, the heavy oil / residual oil / coal tar is used for producing the high additional value carbon microsphere and impregnant asphalt in urgent demand through a technical method of organic combination of catalytic cracking and polymerization reaction; meanwhile, gasoline and diesel oil are byproduct; the lightweight oil product can be greatly produced, the technical flow is simplified, and the whole energy consumption is reduced.

The invention discloses an energy-saving and environment-friendly bridge type crane. The energy-saving and environment-friendly bridge type crane comprises a hoisting device and two main beams, the hoisting device comprises a cross beam, walking beams, a second walking trolley and a hoisting mechanism, sliding grooves are formed in the two sides of the cross beam, the number of the walking beams is two, the two walking beams are arranged at the two ends of each main beam respectively, first walking trolleys are installed on the two walking beams respectively, the two first walking trolleys areinstalled on the two main beams respectively in a sliding mode, the first walking trolley comprise first walking wheels and first driving motors, the first driving motors are used for driving the first walking wheels to slide on the main beams, the second walking trolley is slidably installed in the sliding grooves, the hoisting mechanism is installed on the second walking trolley, and the secondwalking trolley is used for driving the hoisting device to slide along the sliding grooves. According to the energy-saving and environment-friendly bridge type crane, the overall energy consumption of the hoisting device is reduced, and the effect of protecting the environment is achieved while energy is saved.

The invention discloses a method and system for controlling the rotating speed of a cooling fan of a charger and the charger. The method comprises the following steps: acquiring the position number of a charging module in a working state, and obtaining the heating weight corresponding to the charging module in the working state according to the position number of the charging module in the working state; acquiring the rotating speed of the cooling fan in the charging module in the working state; acquiring the environment temperature of the charging module, and acquiring an environment temperature coefficient according to the environment temperature; acquiring the total output power of the charging module in the working state, and obtaining a total output power coefficient according to the total output power; and inputting the heating weight corresponding to the charging module in the working state, the rotating speed of the cooling fan in the charging module in the working state, the environment temperature coefficient and the total output power coefficient into an EC fan rotating speed percentage model to obtain the EC fan rotating speed percentage. According to the method and system, the optimal control of the rotating speed of an EC fan of a charger system can be achieved, and the optimal cooling of the charger system and the lowest system noise can be achieved.

The invention discloses a floor mopping device which comprises a first water tank, the first water tank is connected with a water pumping structure, the water pumping structure is connected with a rolling brush, the rolling brush is connected with a water collecting tank, the water collecting tank is connected with a second water tank, the second water tank is communicated with the first water tank, the water pumping structure enables the first water tank to form negative pressure, and sewage flowing into the water collecting tank from the rolling brush flows back to the second water tank. The invention further discloses a floor mopping machine which comprises a shell, and the floor mopping device is arranged in the shell. According to the floor mopping device, a water pump is not additionally used in the sewage recycling structure, sewage is recycled through negative pressure formed after water is taken by the first water tank, sewage recycling in the state without the water pump is achieved, the overall energy consumption of the floor mopping device is reduced, and meanwhile the production cost is decreased.

The invention discloses a supercritical water gasification hydrogen production and slurry supercritical hydrothermal combustion coupled system and process. Carbon-based energy is adopted, coal slurryenters a high-pressure pre-heater after being boosted and exchanges heat with supercritical water flowing out of the bottom of a supercritical water gasification reactor; the preheated coal slurry enters a supercritical water gasification reactor and is gasified; gasification products flowing out of an outlet in the bottom of the supercritical water gasification reactor enter a separator through the hot fluid side of the high-pressure pre-heater and are separated, and separated slag slurry sequentially passes through a mass component recovery unit, a high-pressure slurry pump and the cold fluid side of a high-pressure heat regenerator, then enters the supercritical hydrothermal combustion reactor and is subjected to a supercritical hydrothermal combustion reaction. Carbon dioxide obtainedby the separator and a three-phase separator is delivered to a microalgae photosynthetic reactor for microalgae cultivation; the cultured microalgae is introduced a centrifugal separator, concentratedalgae slurry discharged from the bottom of the centrifugal separator is introduced into a coal slurry preparation unit to supplement water and / or a hydrothermal liquefaction reactor to produce biological crude oil, and gases such as carbon dioxide obtained by separation is returned to the microalgae photosynthetic reactor through a top outlet.