1042 results about "Steam generation" patented technology

The present invention relates to a steam generator, which includes: a steam shell forming an outer shape and having a space for storing water formed therein; a steam heater, which is arranged inside the steam shell and generates steam by heating the water stored inside the steam shell by applying power; a water pipe, which is arranged on one side of the circumferential surface of the steam shell and is formed with a connecting hole, wherein the connecting hole allows water to flow from the outside into the interior of the steam shell, or allows water inside the steam shell to flow out to the outside; an air intake portion, which is arranged on the upper surface of the steam shell and is formed with an air intake port, wherein the air intake port allows air to flow into the interior of the steam shell; and a steam discharge portion, which is arranged on the upper surface of the steam shell at a predetermined interval from the air intake portion and is formed with a steam discharge port for discharging steam generated inside the steam shell and air flowing in through the air intake portion to the outside.

The invention relates to the technical field of cleaning equipment, and particularly discloses a steam cleaning machine. The cleaning machine comprises a cleaning machine body, a steam generation system, a cleaning agent conveying device, a waste water suction device, a hot air device and a control device are arranged in the cleaning machine body, the cleaning machine body is connected with a multifunctional integrated spray head through a multi-channel connector and a multi-channel connecting pipe, and the multifunctional integrated spray head is of a multi-layer hierarchical structure. The steam nozzle, the cleaning agent nozzle and the spherical suction head are sequentially arranged from inside to outside; during use, steam and a cleaning agent cooperatively soften and decompose dirt, the wastewater suction device sucks sewage through a spherical suction head of the spray head, the hot air device blows out hot air for drying, and all the systems are controlled by the control device. The cleaning device integrates the functions of steam cleaning, cleaning agent assisting, waste water sucking and hot air drying, achieves closed-loop cleaning, is convenient to operate and high in efficiency, and meets the cleaning requirements of floors, furniture, tabletops, household appliance gaps and the like in families, hotels and other scenes.

A hybrid power generation system in one embodiment comprises a green boiler containing a thermal mass composition operable to store thermal energy, a solar energy collection system which absorbs solar energy to heat a first working fluid and in turn the thermal mass composition, and a power generation system comprising a steam turbine coupled to an electric generator to produce electricity and a nuclear steam supply system which convert a second working fluid comprising water from liquid to steam. Steam output by the nuclear steam supply system flows through the green boiler and is heated by absorbing heat from the thermal mass composition to increase the enthalpy of the steam and concomitantly electric power output from the turbine-generator. The nuclear steam supply system and green boiler may be retrofit to replace existing fossil fuel steam generation systems while retaining the energy conversion part of the fossil power plant.

The present disclosure provides systems and methods for hydrogen production as well as apparatuses useful in such systems and methods, including steam generation systems and methods. Hydrogen is produced by reforming of a hydrocarbon in a plurality of reformers to achieve improved reforming efficiency. A CO2 convective reformer (CCR) and an oxygen secondary reformer (OSR) are used in series to convert hydrocarbon and steam to synthesis gas with substantially complete carbon capture. Steam generation is provided along separate pathways to provide separate steam streams of different composition.

The invention relates to the technical field of chemical reaction equipment, in particular to a pulse intermittent water vapor bottom blowing coupling mechanical stirring enhanced mixing device which comprises a tank body, a sealing cover is mounted on the top surface of the tank body, a stirring assembly used for stirring the interior of the tank body is mounted on the sealing cover, the stirring assembly extends into the tank body, and the stirring assembly is connected with the tank body. An air outlet head is arranged at the bottom in the tank body, the air outlet head is communicated with a steam generation unit through an air supply pipe, and the steam generation unit is electrically connected with a pulse control unit used for sending variable frequency signals with adjustable pulse frequency to the steam generation unit. The steam injection frequency is controlled through the pulse control unit, the use amount of the steam is reduced, local high temperature generated by the system during continuous injection is avoided, the temperature is more uniform, meanwhile, convection can be further strengthened through nonlinear input, the periodic structure of the system is damaged, and the service life of the system is prolonged. And more chaotic flow regions are formed to enhance mixing and heat transfer efficiency, so that the production efficiency is improved, and the energy loss is reduced.

A system for generating steam for industrial heat. The system may include a plurality of heat pump cycles in thermal communication with each other and in thermal communication with a steam generation cycle. The plurality of heat pump cycles may include first and second heat pump cycles. The first heat pump circulates a first a working fluid and includes a first heat exchanger. The second heat pump cycle circulates a second working fluid and includes a second heat exchanger. The first heat exchanger transfers heat from the first to the second working fluid. The second heat exchanger transfers heat to a third working fluid in the steam generation cycle.

The invention discloses a steam compression system and a control method thereof. The steam compression system comprises a flash tank, at least one stage of steam compressor and a first water circulation pipe. The flash tank is used for enabling the steam generation water heated to the specified flash temperature to be subjected to flash evaporation under the negative pressure condition in the tank to become low-pressure steam; the steam compressor is used for compressing the low-pressure steam into superheated steam of which the saturation pressure is target condensing pressure; and the first water circulating pipe is used for guiding water of a target water source to motors of the steam compressors at all levels and exchanging heat with heat dissipation mechanisms of all the motors, and the water subjected to heat exchange returns to the target water source. Compared with the prior art, heat at the motor is recycled through water circulation, so that the enthalpy value of water for steam generation is increased, energy consumption needed by steam generation is reduced, and the comprehensive energy efficiency of the system is improved.

The invention discloses a fused salt steam generation system and a control method thereof. A high-temperature molten salt tank, a salt feeding pump, a molten salt channel of a second-stage superheater, a molten salt channel of a first-stage superheater, a molten salt channel of an evaporator, a molten salt channel of a preheater and a low-temperature molten salt tank of the system are communicated in sequence; the water supply end, the water supply pump, a steam-water channel of the preheater, the steam pocket, the pressure regulating valve, a steam-water channel of the first-stage superheater, the water spraying and temperature reducing device, a steam-water channel of the second-stage superheater and the steam removal end are sequentially communicated, and a descending pipe and an ascending pipe of the steam pocket are communicated with a steam-water channel of the evaporator. The control method aims at the system. The method has the advantages that the steam pocket pressure is actively adjusted during load rising, the liquid working medium is flashed, a load instruction can be quickly responded, steam is stably generated according to the instruction and merged into the steam turbine, and the stability and safety of the steam turbine are improved; the steam pocket of the evaporation system is used as steam storage equipment, so that an independent steam storage pocket is prevented from being arranged in the evaporation system, the cost is reduced, and the control logic is simplified.

The utility model relates to cleaning equipment which comprises a floor brush assembly, and the floor brush assembly comprises a floor brush shell, a rolling brush, a rolling brush cover assembly and a steam unit. The rolling brush is rotationally connected to the floor brush shell; the rolling brush cover assembly comprises a rolling brush cover body and a steam output part. The rolling brush cover body and the floor brush shell define a rolling brush cavity used for being matched with a rolling brush. The steam output part is arranged on the rolling brush cover body and used for providing steam for the working face. The steam unit comprises a steam generation module used for conveying steam to the steam output part and further comprises a gas-liquid separation module, the gas-liquid separation module receives the steam, conducts gas-liquid separation on the steam and then conveys the steam to the steam output part, and the gas-liquid separation module is provided with at least two areas which are arranged in the steam flowing direction and are different in sectional area. The area upstream of the steam flow path has a smaller cross-sectional area than the area downstream of the steam flow path. The liquid content in the steam sprayed out of the steam output part is greatly reduced, liquefied water dripping is avoided, and water marks are not prone to being left.

The invention relates to the technical field of cooking equipment, and discloses a cooking equipment control method and device, cooking equipment and a storage medium, and the method comprises the steps: monitoring the temperature of a cooking cavity of the cooking equipment and the working duration of a steam generation module after the cooking equipment starts a steaming function; when the current cooking cavity temperature is smaller than the first preset temperature, the temperature difference between the set temperature corresponding to the steaming function and the current cooking cavity temperature is calculated; based on the temperature difference and the current working duration of the steam generation module, the working duration of the condensate water treatment module is determined so as to control the condensate water treatment module to start working. The starting time of the condensate water treatment module is determined, and the working time of the condensate water treatment module is determined by comprehensively considering the temperature difference between the real-time temperature of the cooking cavity and the set temperature and the working time of the steam generation module, so that the condensate water treatment module is accurately controlled to work, and the steam amount in the cooking cavity is accurately controlled; the user experience is improved, and the after-sales service cost is saved.

The invention discloses a deep peak regulation and frequency modulation heat energy storage system and method coupled with a coal-fired unit, and belongs to the technical field of coal-fired unit flexible transformation and power grid regulation. Aiming at the problems that a single fused salt / solid heat storage occupies a large area, the initial investment is high, a steam generation system is complicated, and a conventional coal-fired unit is difficult to meet the requirements that the minimum power generation output of a new generation coal-electricity pilot demonstration unit is less than or equal to 20% Pe, and deep peak regulation is realized to give consideration to primary frequency modulation performance through self or auxiliary regulation as much as possible in the specification of power generation and transformation energy (2025) 363. The system comprises a heat energy storage unit and a coal-fired unit, the heat energy storage unit comprises a demineralized water supply water tank, an electrode steam boiler, a spherical tank and a heat storage type steam temperature increasing device, and the structure of spherical tank flash evaporation steam supply and heat storage temperature increasing sensible heat supplementing is adopted to be matched with steam supplementing of a steam turbine. The combined minimum power generation output of the two can be reduced to 10% Pe, the peak increase output is at least 5.6% Pe, primary frequency modulation is assisted by increasing and decreasing the power consumption of the electrode steam boiler, and new energy consumption is assisted.

Waste heat cascade utilization system for the synergistic recovery of heat energy from heat exchange and milling heat, characterized in that it includes a mechanical heat recovery device, a primary preheating device, a secondary steam generation device and a tertiary low-temperature utilization device; wherein the mechanical heat recovery device connects the heat-generating components of the blower mill to the dry pipe inlet air duct in order to absorb the heat generated by the heat-generating components of the blower mill and transfer it to the dry pipe inlet air duct; wherein the primary preheating device, the secondary steam generating device and the tertiary low-temperature utilization device are arranged sequentially in the flue gas duct at the dry pipe flue gas outlet; wherein the heat outlet of the primary preheating device is connected to the combustion air duct of the boiler in order to preheat the combustion air of the boiler; wherein the steam outlet of the secondary steam generating device is connected to the steam inlet of a steam turbine to assist the turbine in driving a generator for electricity generation; and wherein the tertiary low-temperature utilization device is connected to the process water line to regulate the process water temperature and to assist the plant heating.

The utility model discloses biomass hydrogen production equipment, and belongs to the field of biomass hydrogen production. The furnace comprises a furnace shell, the furnace shell is divided into a first containing cavity and a second containing cavity through a partition plate, the first containing cavity and the second containing cavity are arranged up and down, a burner is arranged at the top of the first containing cavity, and a slag water outlet is formed in the bottom of the second containing cavity; the combustion chamber and the steam generation chamber are located in the first containing cavity, the top of the combustion chamber is connected with the burner, the lower side of the combustion chamber is communicated with the steam generation chamber, and the lower side of the steam generation chamber is communicated with the second containing cavity; the smoke separation devices are mounted on the upper side of the partition plate, and smoke in the second containing cavity enters the space, located on the outer side of the combustion chamber and the outer side of the steam generation chamber, of the first containing cavity through the smoke separation devices. The device can prevent corrosive gas in synthesis gas from corroding equipment, and the service life of the equipment is longer.

The invention discloses a starting and stopping method of a fused salt steam generator system and electronic equipment, and relates to the technical field of fused salt energy storage. The method comprises the following steps: opening a water feeding adjusting valve of the deaerator, opening an inlet valve of the electric pump, and opening a recirculating valve of the electric pump; closing an electric pump to a steam generation system water inlet valve, closing a steam generation system water feeding main valve, and closing a steam generation system water feeding regulating valve; an electric pump is started to a steam generation system water inlet valve, a steam generation system water feeding adjusting valve is opened, a steam generation system emptying valve is opened, and a steam generation system steam outlet valve is closed; the steam generation system is pre-warmed; the molten salt system is pre-warmed through the molten salt system electric heat tracing device; and the cold salt pump outlet valve and the hot salt pump outlet valve are controlled to be closed, the cold salt pump recirculation valve is controlled to be opened, the cold salt pump is started, the cold salt pump outlet valve is started again, and salt is injected into the fused salt pipeline. The problems of high-temperature corrosion, solidification and the like in the starting process of the molten salt steam generator system are solved.

The invention provides an underground electric heating steam generator and a steam generation system, and belongs to the field of oil and gas field exploitation. The underground electric heating steam generator comprises an underground steam generating mechanism, the underground steam generating mechanism comprises an outer protective pipe and a plurality of heating pipes, the heating pipes are arranged in the outer protective pipe, and a first cavity is formed between the inner wall of the outer protective pipe and the outer walls of the heating pipes; the heating pipe comprises a heating body, and the heating body comprises a wire section and a heating section which are integrally formed; the underground electric heating steam generating system comprises an underground electric heating steam generator, a power adjusting device, a parameter collecting device, a hydroelectric sealing device, a water purifying device and a high-pressure bearing sealing wellhead. Steam is obtained underground, the problem of heat loss caused by ground steam conveying is solved, and the dryness of the steam is guaranteed; steam is obtained by electrically heating the heating body, and the technical problem that a large amount of carbon dioxide is generated due to the fact that a coal-fired boiler obtains steam is solved.

An energy storage system converts variable renewable electricity (VRE) to continuous heat at over 1000° C. Intermittent electrical energy heats a solid medium. Heat from the solid medium is delivered continuously on demand. An array of bricks incorporating internal radiation cavities is directly heated by thermal radiation. The cavities facilitate rapid, uniform heating via reradiation. Heat delivery via flowing gas establishes a thermocline which maintains high outlet temperature throughout discharge. Gas flows through structured pathways within the array, delivering heat which may be used for processes including calcination, hydrogen electrolysis, steam generation, and thermal power generation and cogeneration. Groups of thermal storage arrays may be controlled and operated at high temperatures without thermal runaway via deep-discharge sequencing. Forecast-based control enables continuous, year-round heat supply using current and advance information of weather and VRE availability. High-voltage DC power conversion and distribution circuitry improves the efficiency of VRE power transfer into the system.

The invention discloses an endogenous steam in-situ braking expansion device and a hard carbon material preparation method, and belongs to the technical field of biomass pretreatment, and the endogenous steam in-situ braking expansion device comprises a steam explosion reaction cabin and a water storage cabin which are communicated. An electric heating device is arranged outside the steam explosion reaction cabin, the steam explosion reaction cabin is communicated with the water storage cabin, and an inductance heating device is arranged outside the water storage cabin. The brake expansion device adopts a mode of combining electric heating and inductive heating, water vapor is generated in situ, and energy loss caused by vapor condensation is effectively reduced. Compared with a traditional steam explosion machine, the steam explosion machine has the advantages that energy consumption is effectively reduced, materials can be conveniently fed and discharged, and meanwhile the problem that steam is generated, enters the steam explosion reaction cabin, is condensed and drips on the materials, and consequently treatment is not uniform is solved.

The present invention relates to an automatic wine distilling device using a high-temperature steam heat pump, which comprises a steam heat pump, a wine distilling kettle, a condensation device, a flash tank, a cold storage tank, a steam pipe, a steam delivery pipe and a water pump. The condensation device includes a heat exchange tank, a primary heat exchange component, a secondary heat exchange component and a tertiary heat exchange component. The heat exchange tank is provided with an upper partition plate and a lower partition plate, which are arranged inside the heat exchange tank. The upper partition plate and the lower partition plate divide the heat exchange tank into an upper part of the heat exchange tank, a middle part of the heat exchange tank and a lower part of the heat exchange tank; to accelerate steam generation, during the whole heat exchange process, the high-temperature liquid in the heat exchange channel enters the cold storage tank under the action of the water pump to be cooled and then flows back to the heat exchange channel, so as to improve the heat exchange efficiency. Such a reciprocating cycle can improve the wine distilling efficiency and save energy.

A carbon dioxide separation device 100 disclosed in the present invention comprises: a steam generation source 110 that generates steam used for sweep gas; a separation part 130 including a separation membrane 133 that selectively transmits carbon dioxide, and a first space 131 and a second space 132 that are partitioned by the separation membrane 133; a first flow channel 181 through which a mixed gas that contains carbon dioxide is channeled so as to pass through the first space 131; a second flow channel 182 through which a sweep gas that contains steam is guided to the second space 132; a third flow channel 183 through which a carbon-dioxide-containing sweep gas that is generated in the second space 132 and contains steam and carbon dioxide flows; a decompression pump 140 disposed in the third flow channel 183; and a decompression part 121 disposed in the second flow channel 182. The sweep gas is decompressed in the decompression part 121 and supplied to the second space 132.

The invention relates to the technical field of cooling tower spraying, in particular to a multi-layer spraying device of a closed cooling tower, which comprises a cooling tower main body, a cooling frame mechanism is arranged in the cooling tower main body, a spraying mechanism is arranged above the cooling frame mechanism, and a protective guardrail is fixed on the cooling tower main body. According to the invention, the current introduced into the refrigerating device is controlled to adapt to high-temperature circulating water at different temperatures, the current introduced into the refrigerating device is in direct proportion to the temperature of the high-temperature circulating water, the higher the temperature is, the larger the refrigerating capacity is, the lower the temperature of cooling water is, and the current introduced into the electromagnetic block is in inverse proportion to the temperature of the high-temperature circulating water in the hot water pipeline; the higher the temperature of the high-temperature circulating water is, the smaller the current introduced into the electromagnetic block is, the storage amount of the cooling water in the water storage tank is increased, generation of hot steam can be reduced, on the premise that spraying cooling is not affected, the hot steam is prevented from affecting the heat exchange efficiency, the consumption speed of the cooling water is reduced, and accurate and efficient cooling of the high-temperature circulating water with different temperatures is achieved.

The utility model provides an automatic shower for steaming, which comprises a shower body, steaming room half-cover components are accommodated and folded on two sides of the shower body, and the steaming room half-cover components can be outwards pulled out and expanded under the action of external force to form steaming room half-cover bodies. The half cover bodies are symmetrically matched with the half cover bodies of the steaming room formed by unfolding on the opposite side to form the steaming room; a water inlet valve, a steam generator, a steam outlet valve and a shower assembly are arranged on the shower body, the steam outlet valve comprises a plurality of second steam outlet ends, and one of the second steam outlet ends is connected with a steam room for supplying steam. The steaming room is integrated on the shower, the pair of steaming room half cover bodies capable of forming the steaming room is folded on the two sides of the shower body, the steaming room half cover bodies can be pulled out and unfolded outwards so as to be combined into the steaming room, unfolding combination and folding and folding are convenient and fast, and the problem of storage of the steaming room is solved; moreover, the steam generation system is integrated in the shower body, so that the shower does not occupy space, is convenient to use, can supply steam to the steaming room at any time, and is convenient for people to enjoy the happiness of steaming.

The invention belongs to the technical field of cooking equipment, and discloses a steam generation assembly, a control method of the steam generation assembly, a steam box and an integrated cooker. According to the steam generation assembly, the water inlet of the heating disc is provided with the protruding part, the protruding part is higher than the water level in the water tank, the water temperature and / or the temperature rise rate of the position, close to the water inlet, of the water inlet pipe are / is monitored through the first temperature sensing element, and the water shortage state of the water tank can be rapidly judged due to the fact that the water amount is small and the temperature change is more remarkable. And after determining that the water inlet is lack of water, further judging whether the heating disc is in dry burning or not by combining the heating body temperature and / or the temperature rise rate monitored by the second temperature sensing element. And the accuracy and the reliability of judgment are improved through cooperative monitoring of the double temperature-sensing elements. In addition, by recognizing the water shortage of the water tank in advance, the temperature threshold T3 of the heating body in the dry burning state can be properly reduced, the logic judgment time is shortened, the dry burning duration is shortened, the heating disc is effectively protected, and the service life of the heating disc is prolonged.

The invention provides a boiler combustion optimization method. The boiler combustion optimization method comprises the steps that operation parameters of all key nodes in the combustion process are collected; determining an energy input item, an energy output item and a heat storage energy change item based on the collected operation parameters, establishing a load prediction model, and predicting a load change trend at a future preset moment; a fuel quantity optimization model based on the load change rate is established, the fuel conveying process is optimized, and the ideal fuel quantity is generated; an air quantity optimization model based on the flue gas oxygen content is established, the combustion process is optimized, and the ideal air quantity is generated; establishing a coal-water ratio optimization model based on the steam temperature, optimizing a steam generation process, and generating an ideal coal-water ratio; and controlling a corresponding execution mechanism to act according to an optimization result to realize optimization control of the combustion process of the boiler. By constructing the load prediction model and the combustion parameter optimization model, the dynamic optimization of the fuel quantity, the air quantity and the coal-water ratio is realized, the response speed of the boiler to the load change is improved, and the combustion efficiency and the steam quality are improved.

The invention provides a fused salt heat storage system and method, and relates to the technical field of fused salt heat storage, and the system comprises a fused salt heating assembly, an energy conversion assembly and a steam generation assembly; the fused salt heating assembly heats low-temperature fused salt to obtain high-temperature fused salt and conveys the high-temperature fused salt to the energy conversion assembly; the energy conversion assembly comprises a fused salt hot tank, a fused salt cold tank and a heat exchange unit, the fused salt hot tank stores high-temperature fused salt, the high-temperature fused salt releases heat in the heat exchange unit to obtain low-temperature fused salt, the low-temperature fused salt is stored in the fused salt cold tank, and the fused salt cold tank conveys the low-temperature fused salt to the fused salt heating assembly; the steam generation assembly comprises a water supply unit, and supplied water output by the water supply unit absorbs heat in the heat exchange unit to obtain superheated steam which is output through the outlet end of the steam generation assembly. The system has high adaptability to power market fluctuation, can participate in power grid peak regulation response while supplying heat, achieves thermoelectric decoupling, improves operation flexibility and has high operation efficiency.

The utility model relates to an energy-saving and environment-friendly screw type steam compressor testing device, which comprises an air suction filter, an exhaust separator, a heat recoverer, a lubricating oil tank, a softened water tank and a softened water treatment device, an air suction silencer and an air exhaust silencer are respectively arranged on the compressor air exhaust pipe and the compressor air inlet pipe; the compressor air inlet pipe is connected with the exhaust separator through a circulating water spraying pipeline; the heat recoverer is connected with the softened water tank through a condensate pipe and a balance pipe, the softened water treatment device is connected with the softened water tank, and the softened water tank supplements water to the screw type steam compressor to be tested through a softened water supplementing pipe. The steam generation speed of the air dynamic heat engine is increased through the circulating water spraying pipeline, the dynamic heat engine time is short, and meanwhile the power consumption of the driving motor is reduced; the noise reduction effect is good, the noise reduction cost is greatly reduced, and meanwhile, the field working environment of the test device is greatly improved; through the condensation phase change white smoke elimination technology of the heat recoverer, the heat in the steam can be completely recycled.

The utility model discloses a coffee machine and a milk foam generating system, the coffee machine comprises a coffee liquid generating module provided with a hot water inlet and a coffee liquid output port, a steam generating module provided with a water inlet and a steam output port, the water inlet is used for inputting water required for generating steam to the steam generating module, and the steam output port is used for outputting steam to the steam generating module. Steam generated by the steam generation module flows to the steam output port; the steam conveying pipeline is provided with a steam inlet and a steam outlet, and the steam inlet is connected with the steam output port; the movable tank body is used for containing milk, a communicating opening matched with the steam outlet is formed in the tank body, and when the communicating opening in the tank body is communicated with the steam outlet, steam flowing out of the steam outlet can flow into the tank body. Parts which are not easy to clean are directly omitted, a brand new structure is adopted for replacement, milk only makes contact with the tank containing the milk, and the problems that in the prior art, milk stains are difficult to clean and easy to remain, and the residual milk stains are easy to deteriorate, so that the user experience is affected can be well solved.

The invention relates to the technical field of fused salt heat storage scheduling, and discloses a blast furnace gas fused salt heat storage scheduling and utilization system and method.The blast furnace gas fused salt heat storage scheduling and utilization system comprises a blast furnace gas collection and allocation module, a fused salt combustion heating module, a fused salt heat storage tank module, a steam generation module and a scheduling optimization module. According to the method, the waste gas amount is minimized as a scheduling optimization criterion, the economical efficiency of coal gas resource utilization is enhanced, the diffusion rate is reduced, meanwhile, indirect improvement of the steam productivity is considered, and coordination and unification of multiple targets are achieved.

The application provides a multi-effect desalination system and relates to the technical field of multi-effect evaporation. The multi-effect desalination system can have two working conditions under the action of a first valve, a second valve and a third valve. The first working condition is that the third valve is closed, and the first valve and the second valve are opened. At this time, low-pressure steam discharged by a low-pressure steam generation device is directly introduced into a first-effect evaporator as heating steam. A second condenser can condense part of secondary steam generated by an mth-effect evaporator, so that the pressure in the first condenser and the second condenser is balanced, and the two can work under normal working conditions. The second working condition is that the second valve is opened, the first valve and the third valve are closed, and the second condenser stops working. Medium-pressure steam discharged from a medium-pressure steam generation device is introduced into the mth-effect evaporator to inject the secondary steam generated by the mth-effect evaporator through a steam heat compressor. After mixing, the medium-pressure steam is introduced into the first-effect evaporator as heating steam, so that the energy of the medium-pressure steam can be effectively utilized, and a higher water production ratio is obtained.

The utility model relates to the field of heat pump steam supply, in particular to a stepped heating heat pump steam supply system which is characterized in that a water supplementing pipeline is preheated through a water supplementing preheating device and a heat pump heating device and then provides preheating water for a flash evaporation device, and the water supplementing preheating device can utilize waste heat to preliminarily preheat supplementing flushing water; the heat pump heating device can heat replenished water in a circulating pipeline of the flash evaporation device through the heat exchanger and can also heat replenished flushing water again, so that the replenished water temperature is further increased, high-temperature hot water in the flash evaporation device is replenished into the flash evaporation system, the replenished water temperature of the system is increased, and the energy consumption of the system is reduced. The impact of low water replenishing temperature on stable operation of the system is avoided; the water replenishing preheating device and the heat pump heating device can achieve stepped preheating of water replenishing temperature, waste heat energy is fully utilized, the overall energy consumption of the system is reduced, and the steam generation efficiency is improved.

The invention relates to the technical field of extractor hoods, and discloses an extractor hood which comprises a machine shell, a smoke suction device, a steam generation assembly and a water supply assembly. The smoke suction device is connected to the machine shell. The steam generation assembly is connected to the machine shell and used for heating the liquid medium to generate steam so as to clean the smoke suction device. The water supply assembly comprises a water supply flow path and a water injection port communicated with the water supply flow path, the water supply flow path is communicated with the steam generation assembly, and the water supply assembly is movably arranged on the machine shell to have a working state and a containing state. According to the technical scheme, liquid media can be conveniently supplied and stably conveyed, meanwhile, the problem that accessories are prone to being lost is solved, the internal layout is simplified, and steam cleaning is stably achieved.