6results about How to "Increase feed water temperature" patented technology

The invention belongs to the field of coal-fired power generation, and particularly relates to a heat supply and power generation system for improving the flexibility of a thermoelectric load by coupling molten salt heat storage and an operation method, the system is additionally provided with a heat supply network heating system on the basis of a conventional coal-fired power generation system, and is coupled with an innovative heat storage system adopting a collaborative heat storage and collaborative heat release structure. When the power supply load of the coupling heat supply power generation system is reduced, reheated steam and redundant electric power which is not connected to the network are used for heating molten salt for collaborative heat storage, meanwhile, reheated cold section extraction steam is used for supplying heat to a heat supply network, the load reduction rate is increased, the downward peak regulation depth of the coupling heat supply power generation system can be effectively reduced, and the power supply efficiency is improved. And zero power output of the power generation system can be realized under the condition that the boiler maintains the lowest operation load. The thermoelectric load characteristic interval range of the coupling heat supply power generation system is remarkably expanded, the variable load rate of the coupling heat supply power generation system is improved, and the heat supply and power supply flexibility of the coupling heat supply power generation system is improved.

The present invention relates to a combined steam generating device with a preheating water tank, comprising a softening water processor, a normal pressure heating water system and a steam production system which are sequentially connected in series through pipelines; the steam production system comprises a steam boiler, a variable frequency water supply pump, a check valve and a preheating water inlet pipeline; the normal pressure heating water system comprises a preheating electromagnetic boiler, a preheating water tank, a circulating water pump, an electromagnetic valve and a cold water pipeline; the outlet of the softening water processor is connected to the upper part of the preheating water tank through the cold water pipeline; during operation, incoming water is input into the preheating water tank; at night, the preheating electromagnetic boiler is turned on, and the circulating water pump circulates the water in the preheating water tank into the preheating electromagnetic boiler for heating; during daytime, the burner of the gas steam boiler is turned on, and the flue gas further heats the hot water in the waste heat recovery device, and the hot water enters the gas steam boiler to generate steam.

The utility model discloses a kind of coal-fired power plant boiler systems of promoting deep carbon reduction capacity, by being equipped with hot secondary air warm air heater on secondary air duct, and hot secondary air warm air heater is equipped with extraction steam heating hot secondary air after steam exhaust pipeline;Extraction steam heating hot secondary air after steam exhaust pipeline connects two-stage temperature and pressure reducer, and two-stage temperature and pressure reducer is discharged by the steam exhaust steam turbine two-stage extraction steam pipeline through the steam exhaust steam turbine two-stage extraction steam pipeline adjusting valve of steam turbine two-stage extraction steam pipeline;Main steam output pipeline is connected with one-stage temperature and pressure reducer by being sequentially set extraction steam import shut-off valve, extraction steam import regulating valve extraction steam main pipe in sequence, and one-stage temperature and pressure reducer is equipped with extraction steam pipeline after temperature and pressure reduction;Extraction steam pipeline after temperature and pressure reduction is communicated hot secondary air warm air heater;To solve the problem that boiler stable combustion, feedwater temperature is low, coal mill drying treatment is insufficient when coal-fired power plant boiler exists depth peak shaving, improve the economy of boiler deep regulation condition simultaneously, reduce carbon emission.

The utility model relates to an efficient coal-fired generator set. The coal power unit comprises a boiler, a high-pressure cylinder, a back pressure machine and a feed water heating assembly. The steam output end of the boiler is connected with the steam input end of the back pressure machine; the steam output end of the back pressure machine is connected with the steam input end of the high-pressure cylinder; the first steam circulation area of the back pressure machine is smaller than the second steam circulation area of the high-pressure cylinder; the steam output end of the back pressure machine and the steam output end of the high-pressure cylinder are respectively connected with the feed water heating assembly so as to output steam to the feed water heating assembly; the feed water heating assembly is connected with the feed water end of the boiler so as to output feed water heated by steam to the boiler. The coal consumption of the coal power unit can be reduced.

The application discloses a coal powder boiler peak regulation method, which comprises the following steps: modifying the coal powder into high-temperature gas-solid fuel by using a coal powder preheating combustion method; and setting a heat exchange surface in the preheating burner, and heating the boiler feed water before the boiler feed water enters an economizer. The method solves the problem of poor combustion stability of the boiler at low load, increases the temperature of the boiler feed water, reduces the heat absorption amount of the economizer from the flue gas, reduces the temperature drop range of the flue gas through the economizer, increases the flue gas temperature at the inlet of the SCR, and ensures that the SCR denitration system works in a safe and efficient temperature range.

This utility model discloses a water-saving device for a waste heat boiler deaerator, including a deaerator tower for removing dissolved oxygen from water, a demineralized water tank below the deaerator tower, a deaerator inlet pipe connected to the deaerator tower for water intake, a steam pipe connected to the deaerator tower for deoxygenation, and a louvered steam-water separator connected to the top of the deaerator tower for steam-water separation. The tail end of the louvered steam-water separator is connected to a first bend, the tail end of the first bend is connected to a second bend, the tail end of the second bend is connected to a vertical pipe, the tail end of the vertical pipe is connected to a perforated plate steam-water separator for steam-water separation, and the tail end of the perforated plate steam-water separator is connected to a third bend. By adding a steam-water separator, not only is water loss during the deaerator deoxygenation process reduced, but the problem of steam-water separation during deaerator venting in a thermal deaerator system is also solved. Furthermore, the temperature of the deaerator can be better controlled when the deaerator steam pressure changes.