69results about "Water circulation" patented technology

Disclosed is an energy storage and steam generation system, including an electrode steam boiler. One side of the electrode steam boiler is connected with a boiler deaerator through a pipeline. A pipeline A is arranged at the top of the electrode steam boiler. The pipeline A is connected with a steam superheater, and an outlet of the steam superheater is provided with an external steam supply outlet pipeline. A molten salt steam generation bypass pipeline and a pipeline B are arranged on the steam superheater. One end of the molten salt steam generation bypass pipeline is connected to the steam superheater. A low-temperature molten salt storage tank is connected to the pipeline B, and a high-temperature molten salt storage tank is connected to the low-temperature molten salt storage tank through a pipeline. The other end of the molten salt steam generation bypass pipeline is connected to the high-temperature molten salt storage tank. Meanwhile, a generation method is further disclosed. According to the present disclosure, electric energy is converted into heat energy to be stored in the molten salt, and then energy is released for external steam supply by means of a method for generating steam through heating by coupling the molten salt, thereby realizing large-scale heat storage, prolonging the life of a heating system, and improving the reliability.

The utility model discloses a feed pump core cladding protection system which comprises a circulating fluidized bed boiler, an outlet of the circulating fluidized bed boiler is communicated with an inlet of a steam turbine, an outlet of the steam turbine is communicated with an inlet of a condensate pump, and an outlet of the condensate pump is respectively communicated with an inlet of a slag cooler and an inlet of a booster pump. An outlet of the slag cooler is communicated with an inlet of the water feeding pump through a low-pressure heater and a deaerator in sequence; the booster pump outlet is communicated with the feed pump inlet; the outlet of the high-pressure heater is communicated with the inlet of the circulating fluidized bed boiler. According to the system, a bypass is additionally arranged beside a pipeline, leading to sealing water of a feed pump, of a condensate pump, a booster pump is additionally arranged on the bypass, and the pressure of condensate entering the feed pump seal is adjusted. The lowest pressure of the outlet of the condensate pump is set, once the pressure is smaller than the minimum pressure required by a sealing system, the booster pump is started immediately, stable condensate pressure is guaranteed, a water pump core bag is prevented from being damaged, and safe operation of a unit is guaranteed.

The invention provides a water supply control method, system and device of a supercritical generator set and a program product. The method comprises the steps of obtaining set starting data; responding to the condition that the unit starting data meets the starting stage switching condition, and switching the current starting stage to the next starting stage; an opening degree calculation function, matched with the current starting stage, of the water supply bypass adjusting valve is obtained, and the target opening degree of the water supply bypass adjusting valve is obtained through calculation according to the opening degree calculation function and the boiler combustion rate; and the opening degree of a water supply bypass adjusting valve is controlled to be the target opening degree, and the start-stop state of a water supply main path water inlet valve is controlled according to the current start stage. By dividing the unit starting stages and establishing the dynamic coupling relation between the boiler combustion rate and the water supply bypass regulating valve opening degree, accurate matching of the fuel amount and the water supply amount is achieved, the water supply bypass regulating valve opening degree can be automatically adjusted according to the real-time operation working condition of the unit, the starting time is shortened, the starting cost is reduced, and the starting efficiency is improved. And meanwhile, the automation and intelligence level is improved.

To provide a boiler low temperature state quick flushing method.SOLUTION: A boiler flushing device includes: an activation mechanism comprising a boiler body and a power assembly provided at the boiler body; a scale removal mechanism comprising a transmission assembly provided at the power assembly and a scale scraping assembly provided at the transmission assembly; and a uniform stirring mechanism comprising a fixed column provided at the boiler body, a limiting assembly provided at the fixed column, and a motion assembly provided at the limiting assembly. The scale removal mechanism allows a scale scraping brush to perform circular motion on an inner wall of the boiler body to scrape scales on the inner wall of the boiler body. A scraping member is provided on the inner wall of the boiler body and cleans the scale scraping brush. At the same time, the uniform stirring mechanism is provided on the fixed column to avoid the scraped scales from accumulating on a bottom part of the boiler body and being discharged from the boiler body with water flow through a drain pipe and allow cleaning to be performed more thoroughly.SELECTED DRAWING: Figure 2

The invention belongs to the technical field of thermal power generation, and particularly relates to a feed pump recirculation system for preventing cavitation of a minimum flow valve of a thermal power generating unit. The feed pump recirculation system comprises a condenser, a condensate pump, a low-pressure heat regenerator set, a deaerator, a feed pump and a high-pressure heat regenerator set which are sequentially connected, each stage of extraction steam of an external steam turbine is connected with steam inlets of the high-pressure heat regenerator set, the deaerator and the low-pressure heat regenerator set, and a condensate outlet of the high-pressure heat regenerator set is connected with a condensate inlet of the deaerator. A condensed water outlet of the low-pressure heat regenerator set is connected with a condensed water inlet of the condenser, the water feeding pump sequentially passes through the minimum flow valve, the heat exchanger and the first stop valve and is connected with the deaerator, and external cooling water enters the heat exchanger through the third stop valve for heat exchange and then is discharged. The return water temperature of the feed pump recirculation system is reduced through the heat exchanger, the saturated steam pressure corresponding to the return water is reduced, the cavitation risk of the minimum flow valve is reduced, and the service condition of the minimum flow valve can be obviously improved.

The application discloses a water supply device and a mixed speed regulation control method and device thereof and a storage medium, wherein the water supply device comprises a boiler, a high-pressure heater and a first water supply device and at least one second water supply device connected in parallel, the first water supply device comprises a first water supply pump and a hydraulic coupler, the second water supply device comprises a second water supply pump and a variable frequency motor, the method comprises the following steps: adjusting the rotating speed of the first water supply pump by configuring the scoop pipe opening degree of the hydraulic coupler, and adjusting the rotating speed of the second water supply pump by configuring the operating frequency of the variable frequency motor; heating the pumped water through the high-pressure heater, and conducting convection on the hot water output by the high-pressure heater through the boiler to output superheated steam; acquiring the drum water level of the boiler; determining the target rotating speed according to the drum water level, and determining the scoop pipe opening degree instruction and the variable frequency instruction according to the target rotating speed to control the scoop pipe opening degree of the hydraulic coupler and the operating frequency of the variable frequency motor, so that the drum water level is in a preset water level interval.

A control method for a system in a "steam maintenance mode" after the MFT of a secondary reheat unit boiler comprises the following steps: (1) clarifying the control target of the "steam maintenance mode"; (2) setting the judgment conditions for automatic triggering and automatic exit of the steam maintenance mode; (3) clearly explaining the automatic control of the high, medium and low pressure three-stage bypass and its desuperheating water in the "steam maintenance mode"; (4) detailing the control logic of the feed water pump and the induced draft fan in the "steam maintenance mode"; (5) further explaining the pressure control of the auxiliary steam header and the action of the steam trap group in the steam maintenance mode; (6) giving priority to the supply of the shaft seal in the "steam maintenance mode", while taking into account the control of the condensate system and the auxiliary steam system. The entire control process is transformed from extensive manual control to precise automatic adjustment. It is of great significance to achieve energy saving and consumption reduction of thermal power units, rapid recovery from accident shutdowns, and improvement of the automation level of units.

The present application relates to a method for reducing the start-up time of a water-cooled wall standby furnace, which uses equipment including a gasifier water-cooled wall, a steam drum and a water-cooled wall circulating water pump. The present application makes full use of the heat of the continuous blowdown of the operating series steam drum, and realizes the maintenance of the standby series water-cooled wall temperature, and the system is simple and the control is convenient; compared with the prior art, the present application can reduce the start-up time of the standby furnace, reduce the impact of the gasifier trip on the device operation load, and reduce the economic loss caused by shutdown. According to the water baking time of 8 hours, the present application can reduce the economic loss of 8 hours caused by unplanned shutdown, and according to the gasification scale of 100,000 standard cubic meters / hour of effective gas production, the economic loss can be reduced by nearly 500,000 yuan.

The present application relates to a kind of thermal power generating unit control technical field, is a kind of thermal power generating unit condensate pump automatic control system energy-saving optimization method and device, the former includes determining by deaerator water regulating valve control condensate pump outlet header pressure, then judge deaerator water regulating valve whether full open;In response to no, reduce condensate pump outlet header pressure set value, until deaerator water regulating valve full open;In response to yes, judge current deaerator water regulating valve opening degree whether with condensate pump energy-saving operation match;In response to no, increase condensate pump outlet header pressure set value, until current deaerator water regulating valve opening degree with condensate pump energy-saving operation match.The present application is by lifting the opening degree of deaerator water regulating valve, reduce the throttling loss caused by deaerator water regulating valve opening degree low, simultaneously make the throttling loss of deaerator water regulating valve minimum and condensate pump outlet header pressure maximum, in reducing energy loss while guaranteeing the economy of condensate pump operation.

A method for retrofitting an installation of a type used for a hybrid propulsion system for LNG carriers, said method being based on the steps of retrofitting an LNG carrier boiler of the installation, retrofitting an existing exhaust gas outlet and integrating a new exhaust gas outlet, forming an opening in the combustion chamber of said LNG carrier boiler, introducing exhaust gas from a GTPG inside the formed opening and adding a second superheater inside the exhaust gas outlet between said GTPG and said LNG carrier boiler, integrating an auxiliary steam and water system and integrating an automatic changeover extraction system and connecting both systems to said hybrid propulsion installation.

The utility model relates to the technical field of boilers, in particular to a steam boiler with a superheater, which comprises a boiler body, a corrugated boiler furnace arranged inside the boiler body, a burner mounted at one end of the boiler body, a reversal chamber connected to one end of the corrugated boiler furnace, a threaded smoke tube connected to the upper portion of the reversal chamber, and a steam outlet connected to the lower portion of the boiler body. One end of the threaded smoke pipe is connected with a front smoke box, a superheater and a condenser are installed on the top of the boiler body, and one side of the superheater is connected to the front smoke box through a connecting flue. According to the steam boiler with the superheater, through the arrangement of the corrugated boiler furnace and the threaded smoke pipe, the residence time of smoke in the boiler is prolonged, the heat exchange area of the smoke in the boiler is increased, heat can be more sufficiently transmitted to water, and the heat energy utilization rate is increased. In addition, due to the introduction of the superheater, the temperature and the pressure of the steam are further improved, so that the steam has higher heat energy and power capability, and the requirements of various industrial and living fields on high-quality steam are met.

The invention discloses a pump warming-up system of a natural circulation boiler, and belongs to the technical field of boiler auxiliary equipment. The pump front pipeline and the pump rear pipeline are respectively provided with a first valve and a second valve and are communicated with a downcomer and a coal economizer; the pump warming connection pipeline is provided with a third valve and is communicated with the lower part of the downcomer and an inlet of the coal economizer through a pipeline; the upstream of the second valve is communicated with the upstream of the third valve; the flow meter, the fourth valve and the adjusting valve are sequentially arranged. When the internal circulation pump is standby, the first valve is kept open, the third valve is kept closed, the fourth valve and the electric control valve are opened, the second valve is closed, and a working medium in the downcomer forms a bypass through the pump front pipeline, the internal circulation pump, the pump rear pipeline, the pump warming-up connection pipeline and the economizer recirculation pipeline and then forms a closed natural circulation loop with a boiler evaporation system. And the pump body is kept in a hot state and is consistent with the working medium in temperature during standby. The system is mainly used for keeping the internal circulation pump in a hot standby state in the natural circulation boiler and eliminating the risk of pump starting thermal shock.

A vapor source system based on vapor-liquid ejector supercharging combined with flash vaporization technology belongs to the technical fields of waste heat utilization and steam generation. The system comprises a vapor-liquid ejector, a flash vaporization tank and a intermediate heat exchanger, wherein the vapor-liquid ejector uses high-pressure steam to raise temperature and pressure of low-pressure water absorbed from the flash vaporization tank; the pressure-increased water is flashed into low-pressure saturated steam after entering the flash vaporization tank; the saturated water which is not flashed is collected at the bottom of the flash vaporization tank. The system generates multiple low-pressure flash vaporization saturated steam with a small portion of high-pressure steam, and realizes the recovery and utilization of waste heat such as flue gas of boiler, improves the economy of thermal process, and provides a flexible and adjustable vapor source for heavy oil thermal recovery, seawater desalination or sewage treatment equipment.

The utility model relates to a pump warming system for a steam system water pump. The pump warming-up system comprises a water pump unit for a steam system, the pump warming-up system further comprises a heat recovery deaerator unit, the water pump unit comprises a plurality of water pump parts, and each water pump part comprises a plurality of water pump parts; the water pump part comprises a water pump, a water outlet of the heat recovery deaerator unit is connected with an inlet of the water pump through a water pump inlet valve, a first tee joint is arranged on an outlet pipeline of the water pump, and the second end of the first tee joint is connected with an external water supply pipeline through a water pump outlet valve and a second tee joint. The third end of the first tee joint is connected with the heat recovery deaerator unit through a circulating pipeline with a recirculation valve, and the water pump is connected with the third end of the second tee joint through a first drain valve. The device has the advantages of being simple in structure, reasonable in design and capable of prolonging the service life of the valve and avoiding waste of desalted water on the premise of guaranteeing long-time stable operation of a steam system.

The utility model relates to the technical field of steam boilers, in particular to a steam boiler based on water circulation, and adopts the technical scheme that the steam boiler comprises a boiler body, a water tank is mounted on the side surface of the boiler body, a water inlet pipe is embedded in one side of the top of the water tank, and a second bearing is embedded in one side, away from the boiler body, of the water tank; a water pump is installed at the bottom of the water tank, a water outlet pipe is installed on the side, opposite to the boiler body, of the water pump, and a water suction pipe is installed on the side, away from the boiler body, of the water pump; and the controller is embedded in the rear side of the boiler body, and the machine door is rotationally mounted on the rear side of the boiler body below the controller. The boiler has the advantages that recycled condensate water and water in the water tank can be evenly mixed and then enter the boiler body to be heated, and the heating speed is increased.

The invention discloses a boiler water supply control system for a thermal power plant, which belongs to the technical field of thermal power plant equipment control, and comprises: a data acquisition module; a central processing unit; a control execution module; a human-computer interaction interface; and a communication module. The invention significantly improves the control accuracy of boiler water supply by combining high-precision data acquisition with advanced control algorithms, and can control water level fluctuations within a very small range, thereby ensuring stable operation of the boiler and improving power generation efficiency. Through rapid response capabilities, the system can quickly make adjustments regardless of sudden changes in boiler load or changes in other operating conditions, thereby effectively avoiding safety hazards caused by untimely water supply. Through an operating mode that intelligently adapts to a variety of operating conditions, the need for manual intervention is reduced, the labor intensity of operators is reduced, and the automation level and reliability of the system are also improved.

The invention provides a cooling water circulation device for a calcination high-temperature sampling frame, the cooling water circulation device comprises a demineralized water tank, a water outlet pipeline and a water return pipeline, the demineralized water tank is provided with a water outlet and a water inlet, one end of the water outlet pipeline is communicated with the water outlet, and the other end of the water outlet pipeline is used for being communicated with the calcination high-temperature sampling frame; one end of the water return pipeline is communicated with the water inlet, and the other end of the water return pipeline is communicated with the calcination high-temperature sampling frame. Water supply sampling cooling water of boiler saturated steam, superheated steam and boiler water is changed into demineralized water after chemical treatment, the demineralized water is directly introduced into the cooler from the demineralized water tank and returns to the demineralized water tank after circulation, scaling in the cooler is avoided, the service life is prolonged, the structure is simple, convenience and feasibility are achieved, meanwhile, the demineralized water is recycled, and water is saved.

The utility model relates to the technical field of boilers, and discloses a boiler with an energy-saving device, which comprises a boiler main body, an economizer, a first induced draft fan and a chimney which are sequentially connected, the output end of the economizer is connected with the first induced draft fan through the energy-saving device, a first heat exchange pipeline is arranged in the energy-saving device, and a second heat exchange pipeline is arranged in the chimney. The two ends of the first heat exchange pipeline are connected with a water tank, a first water suction pump is installed at one end of the first heat exchange pipeline, waste smoke generated by the boiler body can be sucked, the waste smoke sequentially penetrates through the economizer and the energy saver, and when the smoke passes through the energy saver, water in the water tank is sucked into the first heat exchange pipeline through the arranged first water suction pump; water in the first heat exchange pipeline absorbs heat of waste smoke in the energy saver and then is conveyed into the water tank again, heat recovery is achieved, and energy conservation and environment protection are achieved.

A water heating system having a tank and one or more heat sources for heating water is provided. The water heating system includes a water outlet for allowing egress of water from the tank and a dip tube for allowing ingress of water into the tank. The dip tube includes a first end for coupling with a water source and a second end disposed proximate a base of the tank for discharging water into the tank through an array of holes. Each of the holes is defined in a side wall of the dip tube and laterally discharges water with respect to a longitudinal axis of the second end of the dip tube.

The invention discloses a multi-loop injection feed water recycling energy recovery system and method for a nuclear power station. An outlet of a deaerator is communicated with a drainage medium inlet of a secondary ejector through an electric feed pump, an auxiliary steam input pipeline is communicated with an inlet of a primary ejector, and an outlet of the primary ejector is communicated with an inlet of the deaerator; a heat release side outlet of the high-pressure heater is divided into two paths, one path is communicated with an inlet of a second-stage ejector through an eighth valve group, the other path is communicated with an inlet of a deaerator through a drainage pump and a third valve group, an outlet of the drainage pump is communicated with the inlet of the second-stage ejector through a ninth valve group, an outlet of the second-stage ejector is communicated with the inlet of the deaerator, and an outlet of the second-stage ejector is communicated with the inlet of the deaerator. According to the system and the method, the high pressure of the recirculating fluid is used as power to eject the fluid with lower pressure, so that the pressure energy of the fluid is partially recovered, and the system and the method play an important role in energy conservation, consumption reduction and safety of the nuclear power station.

The invention relates to a system and method of controlling supply of feed water into a boiler (10). The boiler (10) comprises a feed water inlet (20) for supplying feed water into the boiler (10), a steam outlet (22) for taking steam from the boiler (10), and a liquid level sensor (14) for measuring a liquid level in the boiler (10). The steam outlet (22) comprises a steam valve (26) defining a steam valve (26) opening degree, the method comprising measuring the liquid level in the boiler (10) using the liquid level sensor (14), determining a rate of change of the steam valve (26) opening degree, and controlling the supply of feed water into the boiler (10) via the feed water inlet (20) based on the liquid level in the boiler (10), a reference liquid level for the boiler (10), and the rate of change of the steam valve (26) opening degree.

A soft water continuous supply system comprises a soft water pool, the soft water pool is connected with a steam generation device through a water pump pipeline, the steam generation device is connected with a steam-water separation device through a pipeline, and the steam-water separation device is connected with a water return pool through a water return pipeline. The water return pool is connected with the soft water pool through a water return pipeline, and a water pump is arranged on the water return pipeline. A first fine filtration filter element is also arranged on the water return pipeline at the rear part of the water pump; the soft water tank is connected with an external water source and is connected with the soft water tank through a water supplementing pipeline, and the water supplementing pipeline is sequentially provided with a water pump, a rough filtration filter element and a second fine filtration filter element in the direction from the water inlet end to the water outlet end. The steam generating equipment water supply system solves the problem that in the prior art, a steam generating equipment water supply system is diverse, efficient return water utilization is achieved, particularly, the system runs more stably, the impurity removal effect is good, and the pipeline maintenance frequency can be reduced. And the system is reasonable in arrangement, simple in arrangement and higher in safety popularization value.

The invention relates to the technical field of starting control, in particular to a supercritical secondary reheat unit boiler-recirculation-pump-free starting control method which comprises the following steps that flow data from an economizer outlet to a water cooling wall inlet are obtained, the flow change trend is analyzed, the rotating speed of a water feeding pump and the valve position of a water feeding adjusting valve are read, and the operation state is judged; and the rotating speed execution sequence is adjusted by combining the reheater outlet steam temperature change, and linkage adjustment is conducted on the rotating speed of the water feeding pump according to the main steam pipeline outlet pressure change. According to the method, the continuous incidence relation between the flow trend, the rotating speed action, the temperature change and the pressure feedback is constructed, so that the rotating speed adjusting sequence of the water feeding pump can be dynamically adjusted along with the change of the thermal state, the water cooling wall inlet flow stability is improved, and the coordination degree of the reheat steam temperature and the main steam pressure is enhanced; the thermodynamic system in the starting stage of the unit is stable in response, the response process of the thermodynamic system in the starting stage is more coherent, and the stability and adjustment controllability of the starting process of the unit are enhanced.

The utility model discloses a boiler blow-off steam purification and recovery device, which belongs to the technical field of waste heat recovery and comprises a heat exchanger connected with a boiler, a steam condensation collector, an efficient purification component and a circulating water pump, a first one-way valve is arranged between the heat exchanger and the steam condensation collector, and a second one-way valve is arranged between the heat exchanger and the steam condensation collector. An inlet of the first one-way valve is connected with an outlet of the heat exchanger, an outlet of the first one-way valve is connected with an inlet of the steam condensation collector, the steam condensation collector is communicated with the efficient purification assembly, the efficient purification assembly is communicated with the circulating water pump, and the circulating water pump is connected with a water supplementing opening of a boiler. A pressure reducing valve is arranged between the steam condensation collector and the efficient purification assembly. By means of the structure, the problems that an existing device is difficult to utilize waste heat of water vapor in boiler blow-off and wastes water resources are solved, the energy utilization rate is increased, and green production is promoted.

This invention relates to a method, system, and storage medium for controlling the outlet valve of a low-pressure heater condensate pump. The method includes the following steps: Step S1, sending an increase opening command to the outlet valve of the low-pressure heater condensate pump; Step S2, in response to the completion of the increase opening command, acquiring the liquid level height inside the low-pressure heater; if the current liquid level height is lower than the previously acquired liquid level height, proceeding to Step S3; if the current liquid level height is higher than the previously acquired liquid level height, proceeding to Step S4; Step S3, sending a decrease operating frequency command to the low-pressure heater condensate pump; in response to the completion of the decrease operating frequency command, acquiring the liquid level height inside the low-pressure heater; if the current liquid level height reaches a preset value, proceeding to Step S1; otherwise, proceeding to Step S5. Compared with the prior art, this invention has advantages such as reducing throttling losses, improving economic efficiency, and enhancing environmental benefits.

Disclosed are a steam generating device that is exempt from inspection and an operating method thereof, wherein the steam generating device comprises: a first water pump, a condensing heat exchanger, a second water pump and a steam generating body that are connected in series in sequence; water flows through the first water pump, the condensing heat exchanger and the second water pump in sequence and enters the steam generating body; the first water pump has a water inlet end for inputting water, and the steam generating body has a steam output end for outputting steam and a smoke output end for outputting smoke; the smoke flow duct of the condensing heat exchanger is connected to the smoke output end; the lift of the first water pump is smaller than the lift of the second water pump and larger than the water resistance of the second heat exchange component.

This invention discloses a water supply device and its mixing speed control method, apparatus, and storage medium. The water supply device includes a boiler, a high-pressure heater, a deaerator, and a first water supply device and at least one second water supply device connected in parallel. The first water supply device includes a first water supply pump, a hydraulic coupler, and a first minimum flow valve. The second water supply device includes a second water supply pump, a variable frequency motor, and a second minimum flow valve. The method includes: acquiring the boiler drum water level to determine a target speed based on the boiler drum water level, and determining a scoop tube opening command and a variable frequency command based on the target speed to control the scoop tube opening of the hydraulic coupler and control the operating frequency of the variable frequency motor, thereby ensuring that the boiler drum water level is within a preset water level range; and configuring the on / off flow thresholds of the first and second minimum flow valves according to the operating frequency of the variable frequency motor, so as to accurately control the on / off flow thresholds of the minimum flow valves and thereby improve the energy efficiency of the water supply device.

The application discloses a structure for non-neutral point grounding of a full-immersion electrode boiler, which comprises an isolation room, a furnace shell, phase electrodes and zero electrodes, the furnace shell is arranged in the isolation room, the phase electrodes are arranged in the furnace shell, and the zero electrodes are arranged in the furnace shell, and the structure is characterized in that the structure further comprises a first insulating support, a second insulating support and a conductive connecting piece, the first insulating support is arranged in the furnace shell, the zero electrodes are directly or indirectly arranged on the first insulating support, the second insulating support is arranged on the furnace shell, the second insulating support is located outside the furnace shell, the second insulating support is located between the furnace shell and the ground, the zero electrodes are connected through the conductive connecting piece, the zero electrodes are connected together as a neutral point, the furnace shell is used as a zero point, insulating rings are arranged on water outlets and water inlets of the furnace shell, the insulating rings are located between an outer wall of the furnace shell and an inner wall of the isolation room, the isolation room is grounded, and the furnace shell is not grounded.

The present invention discloses an ocean thermal energy combined supply system. The system respectively sucks surface seawater and deep seawater through a water supply module. After using the surface seawater as a heat source to heat the working medium in a steam generator, the working medium vaporizes. The gaseous working medium heated by a solar collector enters an expander to do work, enabling the expander to drive a generator to generate electricity. A part of the exhausted steam of the expander is transported to an evaporator, and the evaporator absorbs heat through evaporation to achieve refrigeration and output. The remaining liquid working medium in the steam generator sequentially releases heat through a first recuperator, then mixes with the exhausted steam of the expander and releases heat after passing through a second recuperator, and then mixes with the working medium of the evaporator and releases heat after passing through a third recuperator, and then enters a condenser to condense the working medium into a saturated liquid working medium. The saturated liquid working medium then sequentially enters the third recuperator, the second recuperator, and the first recuperator to absorb heat and increase the temperature, and then re-enters the steam generator. The technical solution of the present invention can output electric energy and cooling capacity while improving the conversion efficiency of ocean thermal energy.

The invention discloses a low-load water supply three-impulse control method for a heat supply unit, which comprises the following steps of: taking a steam drum water level as a controlled variable, introducing a steam flow fitting value and water supply flow as auxiliary regulating variables, and realizing dynamic control through a PID (Proportion Integration Differentiation) regulating formula, the steam flow fitting value is calculated through a formula with a dynamic correction coefficient based on the main steam heat supply flow, the regulating stage pressure, the high bypass opening degree and the hot reheat supply flow, the problem that steam flow measurement is not accurate under the low load is solved, meanwhile, a parameter self-adaption strategy is designed according to the working conditions such as starting and stopping, and the measurement accuracy is improved. According to the method, the fluctuation amplitude of the steam drum water level under the low load can be reduced to + / -30 mm, the adjusting time is shortened to be within 30 seconds, and the stability and safety of low-load operation of a heat supply unit are remarkably improved.