Concrete heat storage and exchange system for peak load regulation heat supply of heat power plant and operation method thereof
A technology of heat exchange system and concrete, applied in the direction of heat exchange equipment, heat exchanger type, indirect heat exchanger, etc., can solve the problem that the concrete heat storage and exchange system stays in the paper stage, the thermal power plant cannot meet the maximum heat supply demand, and cannot Back-end users provide stable energy and other issues to achieve the effect of eliminating drying operations, flexible heating parameters, and easy control
Pending Publication Date: 2020-03-24
DONGFANG BOILER GROUP OF DONGFANG ELECTRIC CORP
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Problems solved by technology
However, with the development of user demand and market situation, thermal power plants are also facing some problems: First, because heating users use less steam at night, on the one hand, to meet the minimum load operation requirements, on the other hand, the smoke Gas environmental protection emissions are difficult to meet the requirements, and the thermal power plant needs to increase the load of the unit by opening the backpressure machine to exhaust steam; second, with the rapid increase of the centralized heating area brought about by the rapid urbanization, the thermal power plant cannot meet the maximum heat supply demand during the peak heat consumption period , the gap is getting bigger and bigger
However, the current research on concrete heat storage and exchange systems is still at the stage of paper.
It is known that the concrete heat storage and exchange system that has been practically used is a system that directly charges steam through phase change and directly feeds water into phase change to obtain heat and produce steam. However, due to the heat storage and release characteristics of concrete, the temperature of steam directly generated from concrete varies with time. Decreasing, unable to provide stable energy (heating or power generation) to back-end users
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[0034] All features disclosed in this specification, or steps in all methods or processes disclosed, may be combined in any manner, except for mutually exclusive features and / or steps.
[0035] Any feature disclosed in this specification, unless specifically stated, can be replaced by other alternative features that are equivalent or have similar purposes. That is, unless expressly stated otherwise, each feature is one example only of a series of equivalent or similar features.
[0036] figure 1A schematic flow diagram of a concrete heat storage and exchange system used for peak-shaving heat supply in thermal power plants according to an exemplary embodiment of the present invention is shown.
[0037] Such as figure 1 As shown, according to an exemplary embodiment of the present invention, the concrete heat storage and exchange system for peak-shaving heat supply in a thermal power plant includes a concrete heat storage unit ①, a heat extraction unit and a steam generation u...
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The invention discloses a concrete heat storage and exchange system for peak load regulation heat supply of a heat power plant and an operation method thereof. The concrete heat storage and exchange system involves a concrete heat storage unit, a heat removal unit and a steam generation unit which are connected through a pipeline, wherein a heat source inlet of the concrete heat storage unit is connected with a heat source supply unit, and a heat source outlet of the concrete heat storage unit is connected with a heat source recovery unit; the heat removal unit comprises a heat removal workingmedium storage tank and a heat removal working medium buffer tank, the heat removal working medium storage tank is connected with a heat removal working medium inlet of the concrete heat storage unit, and a heat removal working medium outlet of the concrete heat storage unit is connected with the heat removal working medium buffer tank; a heat removal working medium inlet of the steam generationunit is connected with the heat removal working medium buffer tank, a heat removal working medium outlet of the steam generation unit is connected with the heat removal working medium storage tank, awater feed inlet of the steam generation unit is connected with a water feed supply unit, and a steam outlet of the steam generation unit is connected with a user side; and the operation method comprises a preheating step, a stable heat storage stage and a heat release stage. According to the concrete heat storage and exchange system, the concrete heat storage and exchange system is simpler than aconventional fused salt heat storage and exchange system, and the initial investment and the operation and maintenance cost of the system are lower than the initial investment and the operation and maintenance cost of the fused salt system.
Description
technical field [0001] The invention relates to the technical field of energy storage, and more specifically relates to a concrete heat storage and exchange system used for peak-shaving heat supply in thermal power plants and an operating method thereof. Background technique [0002] In order to meet the national requirements for energy conservation and emission reduction, and to improve the thermal efficiency and economy of the power plant itself, it has gradually become a trend to use the waste heat of the power plant for heating. However, with the development of user demand and market situation, thermal power plants are also facing some problems: First, because heating users use less steam at night, on the one hand, to meet the minimum load operation requirements, on the other hand, the smoke Gas environmental protection emissions are difficult to meet the requirements, and the thermal power plant needs to increase the load of the unit through the exhaust steam of the bac...
Claims
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IPC IPC(8): F28D20/00F28F27/00
CPCF28D20/0034F28F27/00Y02E60/14
Inventor 肖欣悦奚正稳李有霞
Owner DONGFANG BOILER GROUP OF DONGFANG ELECTRIC CORP