931 results about "Zero emission" patented technology

The invention discloses a cyclic utilization and purification treatment system for slurry in pile foundation engineering construction. According to the invention, the purification treatment system is utilized to realize the double breakthrough of environmental friendliness and high resource efficiency in the construction process through the deep enabling of the intelligent regulation and control module. The system constructs a closed-loop management chain of the slurry life cycle by relying on full-process data perception and dynamic optimization capability. The intelligent regulation and control module captures fine changes of physical and chemical characteristics of the slurry in real time and automatically regulates the operation mode of the treatment equipment, so that the purified slurry always keeps the optimal engineering performance index, and the risk of pile body defects caused by quality fluctuation of the slurry is greatly reduced. By means of the intelligent design of the waste slurry recycling path, pollution sources in traditional construction are converted into reusable engineering materials, damage to the ecological environment caused by outward transportation and landfill of waste is remarkably reduced, and an engineering site is promoted to move towards the near-zero emission target.

The invention discloses a fully-recycled prestressed square pile and latticed column combined stand column pile construction method, and belongs to the technical field of green foundation pit supporting. According to the construction method of the fully-recycled prestressed square pile and latticed column combined stand column pile, the prestressed square pile serves as the lower section of the stand column pile and is organically combined with the latticed column, the stand column pile can be pressed into the designed elevation through static pressure equipment, and the construction method has the advantages of being low in construction cost, high in construction efficiency, free of pollution and the like; the stand column piles are integrally pressed into a soil body, the foundation pit soil body is excavated layer by layer, concrete supports and surrounding purlins on the periphery of a foundation pit are supported layer by layer through self-servo hydraulic converters and supporting cross beams, foundation pit construction operation is easy and efficient, and construction is safer and more stable; moreover, after a bottom plate and structural floor slabs of all layers are built, the stand column piles can be recycled by 100%, zero emission is truly achieved, the low-carbon, environment-friendly and green construction effects are achieved, in addition, sensors can be arranged in the pile sections of the prestressed square piles, and foundation pit full-section monitoring and deformation control are achieved.

The invention relates to the technical field of waste incineration, in particular to a waste incineration fly ash reduction and recycling harmless system and a working method. The system comprises a dioxin mechanical detoxification subsystem, a multi-stage countercurrent water washing subsystem, a quaternary system evaporation salt separation subsystem and a heavy metal pickling recovery subsystem, and according to the working method of the system, low-temperature mechanical detoxification, multi-stage countercurrent fly ash water washing, heavy metal pickling recovery and low-cost quaternary system evaporation salt separation are organically combined; the low-cost reduction, harmless and resourceful treatment of the fly ash is realized, the treated fly ash can be directly used for preparing materials such as building materials, and the method has a wide application prospect. In addition, no flue gas is generated, a flue gas treatment system is not needed, secondary fly ash and wastewater discharge is avoided, and near-zero discharge can be realized.

The invention discloses a zero-emission combined treatment method and device for high-salinity wastewater and circulating water, and relates to the field of water treatment.The method comprises the steps that 1, the circulating water and the high-salinity wastewater in a water collecting tank of an open cooling tower enter a diaphragm electrolytic cell for electrochemical softening treatment; (2) carrying out carbon dioxide micro-nano bubble treatment on water discharged from the cathode chamber, then carrying out sedimentation treatment, and returning the treated water to the open cooling tower water collecting tank; (3) monitoring the water quality of the circulating water and the high-salinity wastewater in real time, and discharging the circulating water and the high-salinity wastewater into a closed cooling tower water collecting tank when a discharge condition is met; (4) carrying out reverse scale precipitation treatment on the spray circulating water by using a nanocrystalline material, wherein the closed cooling tower runs under the limit concentration multiple and does not discharge water; and (5) the closed cooling tower sprays circulating water to evaporate and exchange heat, and precipitated scaling particles and crystallized salt particles are discharged after being deposited. Specific components in the high-salinity wastewater are selectively consumed to replace chemicals to remove hardness and obtain a chlorine byproduct, so that high-value utilization of the high-salinity wastewater is realized, and salt reduction and corrosion reduction effects in a downstream process are achieved.

A lump ore drying and circular cooler coupled near-zero emission method comprises the steps that (1) sinter to be cooled sequentially passes through a high-temperature area, a medium-temperature area and a low-temperature area of a circular cooler to be cooled, and the cooled sinter is discharged from a discharging port of the circular cooler; (2) the lump ore to be dried enters a drying machine to be dried, and the dried lump ore is discharged from a discharging opening of the drying machine; (3) the cooling air enters a high-temperature area of the circular cooler and exchanges heat with the sintered ore in the high-temperature area, and after heat exchange, high-temperature hot air discharged from the high-temperature area is pumped back to the high-temperature area to circularly cool the sintered ore after waste heat utilization; and (4) cooling air entering the medium-low temperature area of the circular cooler continues to cool the sintered ore, mixed hot air discharged from the medium-low temperature area is conveyed to the drying machine to dry lump ore after heat exchange with the sintered ore, and dry air discharged from the drying machine is condensed and then pumped back to the medium-low temperature area to circularly cool the sintered ore. According to the system, lump ore drying and the circular cooler are coupled, and full utilization and near-zero emission of waste gas waste heat of the circular cooler are achieved.

The invention relates to the technical field of flue gas recirculation, in particular to a bell-type annealing furnace oxygen-rich combustion flue gas recycling system and method, and the system comprises a circulating flue gas heating cylinder, an oxygen-rich combustor and a system control valve group; oxygen of the oxygen-rich combustor is mixed with fuel, after the fuel enters the circulating flue gas heating cylinder, the oxygen is mixed with part of the fuel to form root flame, and the unburned fuel and oxygen are completely combusted in the circulating flue gas heating cylinder to form flameless flame; the number of the circulating flue gas heating cylinders is one or more, each circulating flue gas heating cylinder is provided with an oxygen-rich combustor, heat generated by combustion is used for heating flue gas generated by combustion of oxygen and fuel in the circulating flue gas heating cylinders, the heated flue gas is circulated to the bell-type furnace through the high-temperature and high-pressure circulating flue gas fan, and redundant flue gas is recycled in a centralized mode. According to the system, heat is fully utilized through flue gas circulation, heating uniformity and quality are improved, combustion flue gas is high-purity carbon dioxide, and zero emission of the flue gas can be achieved through trapping and recycling.

The utility model discloses a hot air distributor for desulfurization waste water zero discharge and flue gas purification system, which comprises a flue gas inlet volute and a flue gas inlet distributor arranged at the bottom of the flue gas inlet volute, a flue gas inlet is arranged on the flue gas inlet volute, a flue is arranged in an inner cavity of the flue gas inlet volute along the path of the flue, and the flue gas inlet distributor is arranged on the flue gas inlet volute. Two guide pieces are arranged on the inner wall of the flue, a smoke outlet communicated with the flue is formed in the inner side wall of the bottom of the smoke inlet volute, the smoke inlet distributor comprises an inner cone, and the inner cone is provided with a heat insulation measure. According to the utility model, air or flue gas is uniformly distributed through the inlet flue gas distributor, so that good gas flow field distribution is realized when the air or the flue gas enters a container, the phenomenon of non-uniform gas distribution of the existing gas distributor is avoided, and the air is uniformly distributed through the two stages of guide vanes after entering the inlet flue gas distributor; the first guide vane ensures the uniformity of gas entering the second guide vane, and the second guide vane enables the air to form a swirling flow field given by design after entering the container through angle design.

The invention discloses a low-energy-consumption skid-mounted triethylene glycol dehydration tail gas zero-emission treatment device which comprises a tail gas cooling unit, a gas-liquid separation unit and a tail gas recycling unit which are connected in sequence, the gas-liquid separation unit comprises a gas-liquid separation tank, the gas-liquid separation tank is provided with a gas output pipe, and the gas output pipe is connected with the tail gas cooling unit. The tail gas recycling unit is provided with a tail gas input pipeline, the gas output pipe is communicated with the tail gas input pipeline, the tail gas input pipeline is further communicated with the power natural gas output pipeline, and an ejector is installed at the joint of the power natural gas output pipeline and the tail gas input pipeline. Tail gas and natural gas are conveyed to the rear end of the natural gas of the main pipeline. The system has the beneficial effects that regenerated tail gas after gas-liquid separation is mixed with power natural gas with pressure under the action of the ejector, and the tail gas is conveyed to the rear end of the natural gas of the main pipeline, so that the tail gas is recycled, the economic benefit is improved, zero emission of the tail gas is realized, and the environment is prevented from being polluted.

The invention provides an HCFC-22 production method with net zero emission of by-product HFC-23, a production process system integrates a conversion and utilization process system of the by-product HFC-23 in the HCFC-22 production process, the HCFC-22 production process is coupled with a conversion process of HFC-23 and CHCl3, the by-product HFC-23 generated in the HCFC-22 production process is directly converted into HCFC-22 and HCFC-21 in the system, and the HCFC-22 and CHCl3 are converted into HCFC-22 and CHCl3. Through further separation and purification and raw material index control, the HFC-23 conversion catalyst keeps good activity, selectivity and stability, HFC-23 generated in the HCFC-22 production process can be effectively converted, and zero emission of HFC-23 in a system is achieved. The method is simple in process, low in investment cost, low-carbon, environment-friendly, efficient in emission reduction and capable of realizing net zero emission of the byproduct HFC-23 of the HCFC-22 production system.

The utility model discloses a Stirling low-temperature liquefaction system which comprises a Stirling cryocooler unit, a liquid storage unit, a cooling water unit and a control unit. The Stirling cryocooler unit comprises a Stirling cryocooler and an internal combustion engine which are connected through a power transmission mechanism; the Stirling cryocooler comprises a condensation head used for liquefying gas, a cold end heat exchanger is arranged in the condensation head, and the cold end heat exchanger is a finned heat exchanger or a tubular heat exchanger. The cold end heat exchanger is directly connected with the liquid storage unit; a water cooler of the Stirling cryocooler is connected with an inlet and an outlet of the cooling water unit; the control unit is electrically connected with the internal combustion engine, the work transmission mechanism, the liquid storage unit and the cooling water unit. By means of the system, the liquefaction efficiency of the liquefaction system is improved, zero emission in the liquefaction process is achieved, meanwhile, the internal combustion engine drives the Stirling cryocooler to conduct gas liquefaction, the energy utilization efficiency is improved, and therefore the problem that a conventional liquefaction system depends on electric power is solved.

The utility model discloses a circulating water ternary purification treatment system which comprises a pretreatment technology unit, a multi-effect purification side filtration equipment unit, a high-efficiency electronic scale removal and prevention equipment unit, a heat exchanger self-cleaning technology unit, an electronic sterilization and algae removal technology unit, a constant-pressure water replenishing exhauster, a tubular heat exchanger and a control unit, the control unit is electrically connected with the multi-effect purification side filtration equipment unit, the efficient electronic scale removal and prevention equipment unit and the heat exchanger self-cleaning technology unit; the circulating cooling water is treated by a pure physical method, so that the effects of scale removal, scale prevention, sterilization, algae removal, filtration and purification are achieved, heat exchange equipment of the system continuously keeps high-efficiency operation of design performance, and the purposes of water saving, energy saving, environmental protection and zero emission are achieved.

The utility model relates to an energy-saving device for recovering high-purity ammonia from wastewater, and belongs to wastewater treatment in the field of environmental protection. Comprising a deamination tower, a preheater, a wastewater cooler, a heat compensation heat exchanger, a compressor and a throttle valve, the deamination tower comprises a heating section, a deamination section, a condensation section, an ammonia washing section and a purification section; the ammonia washing section is provided with a pure water inlet and an ammonia water outlet, and the purification section is provided with a dilute acid aqueous solution inlet and a salt solution outlet. Low-grade waste heat is converted into a high-grade heat source through the compressor, fresh steam is replaced, and the purpose of saving energy is achieved. The problem that tail gas emission needs retreatment in the prior art is solved, zero emission of tail gas is achieved, and meanwhile co-production of ammonia water and ammonium salt is achieved.

The invention belongs to the field of fossil energy combustion and energy conservation and emission reduction, and relates to a fossil energy combustion pollutant resource utilization and zero emission system which comprises an air separation device, an oxygen-enriched combustion system, a dust removal device, a desulfurization device, a water treatment device and a CO2 recovery device. According to the scheme provided by the invention, inhalable particles and nitrogen oxides generated by fossil energy combustion can be greatly reduced, carbon dioxide and sulfides generated by fossil energy combustion are comprehensively recycled, and zero emission of combustion pollutants is realized.

The invention discloses a gas pressurization injection system and method. A four-stage piston compressor of the gas pressurization injection system comprises a first-stage gas inlet steam-water separator, a first-stage gas inlet buffer tank, a first-stage piston compression air cylinder, a first-stage gas exhaust buffer tank, a first-stage air cooler, a second-stage gas inlet steam-water separator, a second-stage gas inlet buffer tank, a second-stage piston compression air cylinder, a second-stage gas exhaust buffer tank and a second-stage air cooler which are communicated in sequence. The system comprises a three-stage air inlet steam-water separator, a three-stage air inlet buffer tank, a three-stage piston compression air cylinder, a three-stage exhaust buffer tank, a three-stage air cooler, a four-stage air inlet steam-water separator, a four-stage air inlet buffer tank, a four-stage piston compression air cylinder, a four-stage exhaust buffer tank and a four-stage air cooler. According to the invention, gaseous carbon dioxide can be prevented from being condensed into liquid through the gas pressurization injection system and the independently researched and developed four-stage piston compressor, so that zero loss of carbon dioxide gas in mixed gas is ensured, 100% recycling of carbon dioxide is realized, zero emission of carbon dioxide in the external environment is realized, and the energy consumption is reduced. The problems that in the prior art, wellhead gas is directly exhausted into air, so that environment pollution is caused, and energy waste is avoided are solved.

The invention discloses a range-extended hybrid motorboat system and a control method, and relates to the technical field of new energy engineering, and the system comprises a man-machine interaction unit which is used for receiving an operation instruction and displaying a system state; the system control unit is used for receiving a user instruction and feedback information and issuing a control instruction to the corresponding unit; the high-low voltage unit is used for storing, converting and distributing the electric energy; and the power integration unit is used for providing a fuel power source for the range extending mode and comprises an engine, an engine controller, an electric control ISG motor, an electric control driving motor, a cooling device, a fuel tank and a liquid level sensor. The range-extended hybrid power mode of fuel power generation and motor driving is adopted, the battery is continuously charged or the electric control driving motor is directly supplied with power when the electric quantity is insufficient, energy can be quickly supplemented through refueling, the problems that a pure electric motorboat is short in endurance and inconvenient to charge are effectively solved, and the service life of the pure electric motorboat is prolonged. The advantages of low noise and zero emission of pure electric drive and long endurance of fuel power are achieved.

The utility model discloses a desulfurization wastewater zero-discharge drying system based on a strong mixer and a venturi, which belongs to the technical field of wastewater desulfurization and comprises a bypass flue connected with a boiler main flue in parallel, an inlet of the bypass flue is positioned between a boiler and an air pre-heater, an outlet of the bypass flue is positioned between the air pre-heater and a dust remover, and the air pre-heater is connected with the venturi. The drying tower, the venturi ejector and the strong mixer are positioned on the bypass flue; the drying tower is communicated with a desulfurizing tower positioned on the main flue; the Venturi jet device is provided with a gas inlet end, a gas outlet end and an injection end, the gas inlet end is communicated with an outlet flue of the drying tower, the gas outlet end is communicated with an inlet flue of the dust remover, the injection end is communicated with an outlet flue of the dust remover through an injection pipeline, and a booster fan is mounted on the injection pipeline; the strong mixer is positioned in the drying tower and is used for mixing the flue gas from the bypass flue and the atomized desulfurization wastewater from the desulfurization tower, and the flowing directions of the flue gas and wastewater fog drops in the strong mixer are opposite. And zero emission of desulfurization wastewater is realized.

The invention discloses a gas-liquid reaction system. The gas-liquid reaction system comprises a wastewater pool, an ozone generator, an oxidation reaction tank and a first micro-interface generator located in the oxidation reaction tank. An inlet of the first micro-interface generator is communicated with the wastewater pool and the ozone generator, and an outlet of the first micro-interface generator is communicated with the inside of the oxidation reaction tank. Therefore, wastewater in the wastewater pool and ozone produced by the ozone generator can be simultaneously conveyed to the first micro-interface generator, the wastewater and the ozone oppositely run in the first micro-interface generator to crush and disperse the ozone into micron-sized ozone micro-bubbles, and the mass transfer area between the ozone micro-bubbles and the wastewater in the oxidation reaction tank can be increased by the ozone micro-bubbles; the oxidation reaction between the ozone and the wastewater is promoted, so that the utilization rate of the ozone is improved. As the oxidation reaction tank is communicated with the wastewater pool, unreacted ozone in the oxidation reaction tank can be conveyed into the wastewater pool to oxidize wastewater, so that the unreacted ozone is fully utilized, and zero emission of ozone is realized.

The invention introduces a system and method for recovering tungsten and molybdenum from low-grade APT slag and treating tailings, and relates to the technical field of mineral waste slag recovery, the system comprises a stock bin, a screw conveyor, a medicament box, a size mixing barrel, a tungsten and molybdenum reselection unit, a thickener unit, a filter press unit, a stirring barrel, a clean water pump pool and a clean water pool. According to the method, tungsten and molybdenum elements are effectively enriched through the reselection technology of the enrichment concentrator and the suspension concentrator, zero emission of water is achieved in the production process, the technology is simple, operability is high, the production cost is low, and production enterprises can obtain considerable economic benefits. Useful metal tungsten and molybdenum are extracted, harmless treatment is carried out on tailings, and resource utilization of phosphorite is carried out. And a process technology for enriching tungsten and molybdenum by adopting a reselection method is environment-friendly, industrial large-scale production is easy to realize, and a win-win situation of environmental protection, social benefits and enterprise economic benefits is realized.

The utility model discloses a radial double-end-face dry gas sealing structure which comprises a shaft sleeve, a rotating shaft, a spring seat, a spring, a push ring, a first floating sealing ring, a second floating sealing ring, a static ring and a rotating ring, the shaft sleeve is connected with the rotating shaft, the rotating ring is fixedly connected with the shaft sleeve, the spring seat is fixed on a cavity, and the spring is installed in a hole groove of the spring seat. The spring and the static ring are arranged on the two sides of the push ring respectively, the two ends of the push ring are each provided with an annular groove, the first floating sealing ring and the second floating sealing ring are arranged on the annular grooves in a sleeving mode respectively, the end face of the first floating sealing ring and the end face of the second floating sealing ring make close contact with the static ring and the spring seat respectively to form contact sealing, and the rotating ring is located on the side portion of the static ring. The rotating ring is tightly attached to the static ring. Two groups of dry gas sealing friction pairs are formed, radial double-end-face dry gas sealing is formed, the whole structure is compact, the size of the axial occupied space is small, leakage of process gas is prevented by introducing sealing gas, zero emission of process media can be guaranteed, and the problem of large leakage amount is solved.

The present invention discloses a zero-emission process for the coordinated treatment of multi-source wastewater in a steel mill. This process features zero-emission selective separation of desalted water and coal gas condensate from a softening station, recovery of natronasite from cold-rolling rinsing wastewater using high-pressure nanofiltration concentrate, coordinated treatment of high-pressure reverse osmosis concentrate with desulfurization wastewater and high-salt solid waste ash, and low-cost treatment of ammonia and nitrogen. The coordinated treatment of multi-source wastewater and high-salt solid waste ash significantly reduces the pollutant content in ash washing water, thereby reducing subsequent wastewater treatment costs and wastewater usage, significantly lowering the disposal costs of solid waste and wastewater, and achieving internal consumption and zero-emission of multi-source wastewater.

The invention relates to a zero-emission technology for producing power in a thermal plant using natural gas (NG) or liquefied natural gas (LNG), followed by capturing carbon dioxide (CO2) and converting it into green Dimethyl Ether (DME). The process integrates a gas-based combined cycle power plant with CO2 capture through Pressure Swing Adsorption (PSA) (106) and Monoethanolamine (MEA) purification. Captured CO2 undergoes a Reverse Water Gas Shift (RWGS) (306) reaction at temperatures above 900°C to form CO, which, along with syngas from steam methane reforming (308a, 308) at 525°C to 900°C and 25 ATA pressure, is converted into DME using a Cu / ZnO / Al2O3 catalyst at 250-300°C and 25-40 ATA. The process achieves an energy efficiency factor of 93.04%, producing 92 kg of DME per 48 kg of LNG, with a 94% greenhouse gas abatement, contributing to net-zero emissions (NZE) while generating bulk thermal power.

The invention discloses a zero-emission building virtual energy storage system scheduling strategy analysis method and device, and the method comprises the steps: constructing an inversion air-conditioning model which is used for describing a function relation between heat supply power and electricity consumption; the heat storage capacity of the zero-emission building envelope structure is converted into electricity storage capacity through the inversion air conditioner model; constructing a virtual energy storage system model according to the storage capacity of the zero-emission building envelope; the energy storage capacity of the zero-emission building envelope is quantified through the virtual energy storage system model; and solving and calculating the battery energy storage system model and the virtual energy storage system model through a weekly stage optimization operation strategy, a daily stage optimization operation strategy and an hour stage optimization operation strategy to obtain optimal scheduling strategies of the weekly stage, the daily stage and the hour stage. According to the three-stage optimization scheduling strategy provided by the invention, the utilization efficiency of the virtual energy storage system and the battery energy storage system is improved through weekly stage optimization.

The embodiment of the utility model provides zero-emission methanol preparation equipment based on garbage gasification and water electrolysis. The equipment comprises a water electrolysis hydrogen production unit, a garbage gasification unit, a first methanol synthesis unit, a second methanol synthesis unit and a gas separation unit, the water electrolysis hydrogen production unit is respectively connected with the garbage gasification unit, the first methanol synthesis unit and the second methanol synthesis unit; the gas separation unit is respectively connected with the garbage gasification unit, the first methanol synthesis unit and the second methanol synthesis unit; the water electrolysis hydrogen production unit generates hydrogen and oxygen through electrolysis; the garbage gasification unit is used for carrying out gasification reaction by using oxygen provided by the water electrolysis hydrogen production unit to prepare synthesis gas containing carbon monoxide, carbon dioxide and hydrogen; the gas separation unit is used for separating carbon monoxide, carbon dioxide and hydrogen in the synthesis gas introduced from the garbage gasification unit, the carbon monoxide and the hydrogen are introduced into the first methanol synthesis unit, and the carbon dioxide is introduced into the second methanol synthesis unit for preparing methanol respectively.

The invention relates to the technical field of operation machinery, and discloses a crane. The crane comprises a traveling driving system which comprises a driving motor and a traveling mechanism, and the driving motor is connected with the traveling mechanism; the fuel cell system comprises a cell stack, a hydrogen supply mechanism and an air supply mechanism, and the cell stack is connected with the hydrogen supply mechanism and the air supply mechanism; the operation system comprises a winch motor, a winch box, a rotation assembly, a rotation motor, an oil pump motor and an operation hydraulic assembly, the winch motor is connected with the winch box, the rotation motor is connected with the rotation assembly, and the oil pump motor is connected with the operation hydraulic assembly; and the control system is electrically connected with the traveling driving system, the fuel cell system and the operation system. The fuel cell system serves as a power source to provide power for the crane, water and heat are mainly generated in the operation process of a fuel cell, harmful tail gas emission is avoided, fuel can be rapidly supplemented through a hydrogen refueling station, and zero emission, high efficiency and high energy supplementing speed are achieved.

The invention relates to the technical field of smelting, in particular to a waste gas zero emission control method and device, electronic equipment and a storage medium. The method comprises: acquiring a waste gas demand request; the requirement type of the waste gas demand request is judged based on the waste gas demand; if the exhaust gas demand request comprises a temperature requirement, controlling the first exhaust gas supply; if the exhaust gas demand request does not include a request, controlling the second exhaust gas supply; before the first waste gas supply is controlled or the second waste gas supply is controlled, the method further comprises the steps that the dust concentration value is obtained; judging whether the dust concentration value is greater than a dust concentration threshold value or not based on the dust concentration value; and if the dust concentration value is greater than the dust concentration threshold value, controlling a dust removal module to work so as to carry out secondary dust removal. The device has the effect that waste gas can be recycled to achieve green production.

The invention belongs to the field of industrial silicon submerged arc furnace smelting, and provides a closed industrial silicon submerged arc furnace which comprises a submerged arc furnace body, a supporting platform is arranged above the furnace body, and a discharging uniform distribution device, a flue gas emission system, an electrode operation system, a feed system and a two-dimensional space movement furnace ramming device are arranged above the supporting platform. A water-cooling closed smoke hood is fixed below the supporting platform, a furnace charge preheating device is arranged at the top end in the water-cooling closed smoke hood, a three-dimensional space movement furnace ramming device, an electrode operation visible system and an explosion-proof device are arranged on the side part of the water-cooling closed smoke hood, and an oxygen blowing refining device and a continuous silicon discharging device are arranged on the side part of the furnace body; and a furnace body rotating system is also arranged at the bottom of the furnace body. The problems that the industrial silicon submerged arc furnace is high in energy consumption, large in emission, low in efficiency and the like in the smelting operation process are solved, and the beneficial effects of low consumption, less emission, zero emission and the like are achieved.

The invention relates to the field of grass mower equipment, in particular to a pure electric new energy hob type grass mower which comprises a frame, a driving system, a lithium battery power system, a control panel and a grass mowing system. The driving system is used for driving the frame to operate and driving the grass cutting system to cut grass; the lithium battery power system is used for prolonging the endurance time of equipment and providing stable power output; the control panel is used for controlling the grass mowing speed of the grass mower and the rotating speed of a cutter head of the grass mower by an operator; the grass mowing system is used for mowing a corresponding lawn; the lithium battery power system is composed of a lithium battery pack. The invention aims to provide the grass mower which is zero in emission, meets the modern environmental protection requirement and can meet the long-time lawn maintenance requirement.

The utility model relates to the technical field of concrete mixing plants, in particular to a sewage zero-discharge treatment system for a concrete mixing plant. The system comprises a sand-stone separation loop, a slurry treatment loop and a zero-emission treatment loop, wherein the sand-stone separation loop comprises a discharge chute, a sand-stone separator and a grit chamber which are arranged in sequence; a cyclone is arranged in the discharge chute; the slurry treatment loop comprises a stirring tank and a finished product slurry tank which are arranged in sequence; one end of the stirring tank is connected with a clean water tank through a water pump and connected with a discharge chute through a cyclone, and the other end of the stirring tank is connected with a finished product slurry tank; the finished product slurry tank is connected with a sewage scale through a pipeline, and a concentration tester device is arranged above the finished product slurry tank; the zero-emission treatment loop comprises a control cabinet; and the control cabinet is connected with the sand-stone separation loop and the slurry treatment loop respectively. According to the utility model, the problems that various wastes and mortar water on the site of the mixing plant exceed the standard and pollute the environment are solved, and controllable sewage, adjustable concentration and resource recycling are realized.

The invention relates to the technical field of baking, and discloses an oxygen-rich combustion heat radiation baking device which comprises a baking ladle, a ladle cover, a roaster and a flue gas circulation unit. The ladle cover covers the top opening of the baking ladle; a smoke outlet is formed in the ladle cover and is communicated with the interior of the baking ladle; the roaster comprises a heat radiation sleeve, and the heat radiation sleeve is fixed to the ladle cover, located in the roasting ladle and extends in the first direction; the first direction is a vertical direction; an air inlet of the smoke circulating unit is communicated with the smoke outlet, and an air outlet is communicated with the interior of the baking ladle; a combustion channel for fuel gas and oxygen is formed in the heat radiation sleeve, and smoke flows out of an outlet of the heat radiation sleeve, then sequentially flows through the interior of the baking ladle, the smoke outlet and the smoke circulation unit and enters the baking ladle again through the smoke circulation unit to circularly flow. According to the invention, the baking temperature can be quickly increased to the required level by only needing a small amount of fuel gas, the baking time is shortened, the heat utilization efficiency is improved, and zero emission of flue gas is realized.

The invention discloses a ship propulsion system and method, and relates to the technical field of ships, the system comprises a direct current power distribution subsystem, a PTI / PTO motor, a diesel engine, a gearbox, a water-jet propeller and a control subsystem; the direct-current power distribution subsystem is used for supplying power to the PTI / PTO motor; the gear box is used for driving the water-jet propeller under the driving of the PTI / PTO motor and / or the diesel engine so as to propel the ship; and the control subsystem is used for controlling the power flow direction of the PTI / PTO motor and controlling start and stop of the diesel engine, so that the ship operates according to a preset driving mode, and the driving mode comprises a PTI / PTO motor driving mode. By means of the system, when the ship enters a specific area for port operation or sails offshore, the ship is switched to sail in the PTI / PTO motor driving mode, so that the waste gas influence caused by diesel engine driving is avoided, and zero emission is achieved.