35results about "Water accumulator" patented technology

The invention provides a thermal power generating unit deep peak regulation and backheating energy saving method. Through a manner that a hot water heat storing system is arranged in a thermal power generating unit system, at the period when deep peak regulation needs to be participated in, exhaust steam in a pressure cylinder in the unit is extracted, cold water is heated through a heat exchanger, heated water is stored in a heat storage water tank, and deep peak regulation is achieved; meanwhile, the power generation load is reduced, and continuous and stable running of the unit is guaranteed; and at the period when deep peak regulation does not need to be participated in, hot water in the heat storage water tank is supplied to a condensed water pipe in front of a deaerator through a water pump, and therefore heat stored at the deep peak regulation period is sufficiently used, the heating steam amount of a low-pressure heater system at present is greatly reduced, and the aims of increasing the power generation load, recycling the heat stored in the heat storage water tank and reducing the coal consumption are achieved. In the overall peak regulation process, the hot water heat storage technology is applied, the on-grid peak regulation capacity of the unit is improved, the running energy consumption of the unit is saved, and the dilemma of clean energy consumption is effectively released.

A self-contained portable heating system to heat a stored liquid in a storage tank to a desired temperature is provided. The system can comprise operatively connected components such as a generator to power a burner that can transfer energy from a combustion product, from for example, a fuel supplied by an attached fuel tank, to a heat transfer fluid through the use of a boiler. The heat transfer fluid can transfer heat from the boiler 24 to a heat exchanger which can then transfer heat to the stored liquid in the tank. The tank can also comprise a circulating pump that can circulate the heat transfer fluid and an expansion tank that can receive the heat transfer fluid when it expands as a result of being heated. In some embodiments, the heating components can be supplied separately from storage tank so that they can be retrofit onto an existing tank.

A steam power plant is suggested having, parallel to the low-pressure passage (VW1 to VW2), a heat reservoir (A) which is loaded with preheated condensate in weak-load times. This preheated condensate is taken from the heat reservoir (A) for generating peak-load and inserted downstream of the low-pressure preheater passage (VW1 to VW2) into the condensate line (19.2) resp. the feed water container (8). Thus it is possible to quickly control the power generation of the power plant in a wide range without significantly having to change the heating output of the boiler of the steam generator (1). A steam power plant equipped according to the invention can thus be operated with bigger load modifications and also provide more control energy.

The invention discloses an electric thermal storage preheating steam generator. The electric thermal storage preheating steam generator comprises a thermal storage open type water tank. A water outletof the thermal storage open type water tank is connected with a suction inlet of a pressure pump. An outlet of the pressure pump is connected with a water inlet of a heating pressure-bearing water pot. A heating device and a second temperature sensor are arranged inside the thermal storage open type water tank. A first electric heater, a liquid level sensor, a pressure sensor and a first temperature sensor are arranged inside the heating pressure-bearing water pot. A safety valve and a steam outlet are arranged on the top of the heating pressure-bearing water pot. The electric thermal storagepreheating steam generator can preheat water with low-price electricity at the periods of valley electricity at night and common-price electricity during daytime, steam is generated through preheatedhot water when steam is needed for use, the electrical load during steam generation is decreased, the operating cost of a system is reduced then, and the electrical load of the system is decreased aswell.

Thermodynamic fluctuations caused conventionally during introduction of a relatively cold liquid into the vapor generator can be reduced considerably or eliminated by providing a preheating region, so that the necessary amount of vapor can be provided in a substantially continuous manner. Vapor generation can here be controlled on the basis of the vapor pressure in the evaporation region, wherein advantageously during operation of a soldering system the pressure in the corresponding process chamber can also be used for control in such a manner that there is always a pressure gradient and additional conveying means, such as pumps for the vapor supply, can thereby be avoided.

The invention discloses a control system based on a residual steam and residual heat recovery device, which comprises a still kettle, a residual steam and residual heat recovery system host, a heat exchange unit, a temperature sensing unit, a main control system unit, a liquid level sensing unit and a flow monitoring unit, wherein the heat exchange unit is arranged in the residual steam and residual heat recovery system host, the residual steam and residual heat recovery system host is connected with a heat energy storage tank, and the liquid level sensing unit and the flow monitoring unit arearranged in the heat energy storage tank; the heat energy storage tank is connected with a heat energy radiator, and the heat energy radiator is connected with a buffer adjusting tank; according to the invention, different parameter data when the medium is conveyed to each stage are obtained through each monitoring unit, so that no heat loss of the medium is ensured in the transmission process, and resource utilization maximization is achieved.

According to the integrated heat storage coal-fired power generation system and the working method, when a unit operates at a low load, a carbon dioxide compressor is driven by excess electric power to compress a carbon dioxide working medium to a high-temperature and high-pressure state, so that part of supplied water shunted by the coal-fired power generation system absorbs heat of carbon dioxide and then is conveyed to a hot water storage tank; and when the load of the unit is increased, the stored pressurized water working medium in the heat storage water tank is released and is heated to a saturated state through the low-temperature flue gas heat exchanger to replace steam extraction of a steam turbine to heat feed water, so that steam extraction is reduced, and rapid load increasing is achieved. The lower-load operation of the unit is realized, the variable load rate is improved, and the unit flexibility is improved. The low-temperature flue gas heat exchanger is arranged at the tail of the boiler, so that flue gas waste heat can be recycled.

An embodiment of the invention discloses a steam heat accumulator comprising a tank body, wherein a thermal insulating layer is arranged on the tank body; a plurality of hoops, end rings, longitudinal braces and radial braces are further arranged between the thermal insulating layer and the tank body; the end rings are arranged at the end portions of the tank body; the hoops are arranged on the tank body; the longitudinal braces are arranged between adjacent hoops; each radial brace is arranged between one end ring and the hoop adjacent to the end ring; and the thermal insulating layer is fixed to the longitudinal braces and the radial braces. In the embodiment of the invention, the thermal insulating layer can be smoothly fixed to the steam heat accumulator by means of the hoops arrangedon the tank body of the steam heat accumulator; and the thermal insulating layer is not needed to be welded on the outer surface of the steam heat accumulator by way of fixing using the hoops; therefore, the thermal insulation performance of the steam heat accumulator in the embodiment of the invention can be ensured.

The invention discloses a thermal power plant flue gas waste heat recovery and energy storage system which comprises a boiler, an economizer, a denitration device, an air preheater, a high-temperature flue gas heat exchanger, a medium-temperature flue gas heat exchanger, a high-temperature water storage tank, a low-temperature water storage tank, a water inlet main pipe, an air inlet channel and a smoke exhaust pipe. The air preheater is arranged on the air inlet channel, an outlet of the smoke exhaust pipe is divided into a first smoke exhaust branch and a second smoke exhaust branch, the first smoke exhaust branch is communicated with the air preheater, and the second smoke exhaust branch is sequentially communicated with the high-temperature smoke heat exchanger and the medium-temperature smoke heat exchanger. According to the system, the high-temperature water storage tank and the low-temperature water storage tank operate to be matched with a condensation water throttling mode on the water inlet main pipe, the load lifting speed of the unit can be increased, the gradeability of the unit can be improved, safe and stable operation of the system can be maintained, and during low-load operation, the temperature of flue gas in front of an SCR denitration device is increased through storage of the high-temperature water storage tank; the removal efficiency is improved.

The invention provides a power control method of a heat storage peak shaving system under heat storage and heat release working conditions. The heat storage peak shaving system is included. In a heatstorage mode, after condensed water (cold water) sent out by a condensed water pump passes through a heater, the cold water is changed into hot water, one path of hot water enters a deaerator, the other path of hot water enters a water storage tank, and the equal amount of cold water is discharged to a condenser from the water storage tank. Due to the fact that the total amount of hot water entering the deaerator is relatively fixed, the flow entering the water storage tank is increased, the flow passing through the heater is also increased, the generating power of a unit is reduced, and viceversa. In a heat release mode, one path of condensed water sent out by the condensed water pump passes through the heater to enter the deaerator, the other path of the condensed water sent out by thecondensed water pump enters the water storage tank, and the equal amount of hot water is pumped to the deaerator from the water storage tank through a booster pump. Due to the fact that the total amount of hot water entering the deaerator is relatively fixed, the flow pumped out of the water storage tank is increased, the flow passing through the heater is reduced, the generating power of the unitis increased, and vice versa. An applicant proposes a heat storage technology by using the water storage tank, the ramp rate of the unit is increased, a power grid dispatching instruction is rapidlyresponded, and the power control method of the heat storage peak shaving system under heat storage and heat release working conditions is a new mode for increasing the ramp rate of the unit.

The invention provides a large-diameter water storage tank with a labyrinth type water distribution function and a water distribution method for keeping a thermocline stable. The phenomenon that the water temperature in a tank is likely to be uneven in the water inflow and outflow processes of the large-diameter water storage tank, the thermocline at the cold water and hot water juncture is easilydamaged due to water inflow and outflow disturbance, and normal use of a system is severely affected. The large-diameter water storage tank comprises a water storage tank body, and two labyrinth typewater distribution devices are arranged in the water storage tank body and are arranged at the upper part and the lower part of the water storage tank body respectively. Each labyrinth type water distribution device comprises a group of branch pipes (1), a set of annular pipes (3) and a header (3), wherein the adjacent annular pipes are connected through the branch pipes, the annular pipe at theinnermost layer is connected with the header through the corresponding branch pipe, and a group of small holes with the same diameter are uniformly formed in the annular pipes. The small holes are opposite to the thermocline of the water storage tank body. The drilling range of the small holes is limited between 90 degrees and 120 degrees in the circumferential direction, and the directions of thesmall holes of the annular pipes are consistent. The large-diameter water storage tank is applied to large storage containers with media having temperature gradients.

A Rankine cycle energy storage peak regulation system based on heating power mainly comprises a medium-pressure heat storage tank, a low-temperature water storage tank, a flash tank, a medium-pressure heat storage tank circulating pump, a heat storage water feeding pump and an electric steam boiler. The method is characterized in that steam heat energy during a new energy peak regulation period of a pure condensing power plant boiler is stored in a medium-pressure heat storage tank in a saturated water state; new energy electric power energy is converted into saturated water to be stored in the medium-pressure heat storage tank; in the non-new energy peak regulation period of a pure condensing power plant boiler, saturated water in a medium-pressure heat storage tank is pressurized and mixed into boiler feed water, regenerative extraction steam of a steam turbine heater is squeezed, stored energy is recycled, the power capacity of a steam turbine is increased, the coal burning amount of the boiler is reduced, and energy storage and energy release of boiler steam and new energy electric energy in a thermal Rankine cycle system are achieved; and the system serves deep peak regulation of new energy.

The invention provides a single-tower multilayer non-pressure high-temperature superheated steam furnace. The single-tower multilayer non-pressure high-temperature superheated steam furnace comprises a pot body, a furnace body, a main flue, a combustion chamber, a multilayer energy-gathering high-temperature superheated bin, a cast steel non-pressure energy-gathering and multi-pipe superheated steam chamber. The single-tower multilayer non-pressure high-temperature superheated steam furnace is characterized in that according to the local policy, the production cost is calculated by combining the local geothermal energy resources, the seats are matched, various fuel energy sources can be conveniently used, any structure of the boiler does not need to be changed, the gas consumption is large or small, a single tower and multiple towers are connected in parallel for use, the air temperature can be high or low by 100-500 DEG C, and the steam furnace is manually matched with an electric appliance and is controllable and adjustable. The single-tower multilayer non-pressure high-temperature superheated steam furnace has the advantages that the universality and flexibility are achieved, various fuel energy sources can be used, the steam furnace is suitable for industrial and agricultural production and is suitable for various aspects of life of people, and the advantages are summarized into twenty characters: the structure is simple, flexibility and convenience are achieved, energy conservation and low consumption are achieved, safety and environmental protection are achieved, and time and labor are saved.

A system for preheating a heat recovery steam generator is provided. The system includes a tank and a heat exchanger. The tank contains a transferring medium. The heat exchanger is disposed in a flow path of a flue gas produced by a combustion chamber, and is fluidly connected to the tank such that the transferring medium flows through the heat exchanger and is heated by the flue gas. The transferring medium preheats one or more components of the heat recovery steam generator.