Preheating method for molten salt tank of thermal storage system of photothermal power station

A technology of heat storage system and photothermal power station, which is applied in the direction of solar heating system, solar heat storage, solar thermal power generation, etc., and can solve the problem of incomplete preheating time storage of heat sources in preheating structure layout, uneven preheating temperature, pollutants, etc. High emissions and other issues, to avoid freezing accidents, reduce the cost of temporary materials, and enhance the effect of air disturbance

Inactive Publication Date: 2019-10-11
SEPCOIII ELECTRIC POWER CONSTR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current molten salt tank preheating technology is not perfect in terms of preheating structure layout, heat source selection, preheating time, etc., high energy consumption, high pollutant emissions, and uneven preheating temperature

Method used

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  • Preheating method for molten salt tank of thermal storage system of photothermal power station
  • Preheating method for molten salt tank of thermal storage system of photothermal power station
  • Preheating method for molten salt tank of thermal storage system of photothermal power station

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Embodiment Construction

[0030] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0031] The method for preheating the molten salt tank of the heat storage system of the photothermal power station includes the following aspects,

[0032] 1. Selection of equipment: The selection of the preheating gas furnace is determined by analyzing the capacity of the molten salt tank.

[0033] The type of gas furnace should be selected according to the temperature rise requirements, and the fuel can be selected from natural gas, propane gas and other non-pollutant gases after combustion.

[0034] 2. Design of temporary preheating pipeline: Determine the temporary pipeline layout of the preheating system through the analysis of molten salt tank and flue gas flow state.

[0035] 3. Arrangement of preheating system of molten salt tank:

[0036] 1. A pipeline connection is reserved on the top of the molten salt tank 3, and gas furnaces, val...

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Abstract

The invention discloses a preheating method for a molten salt tank of a thermal storage system of a photothermal power station. The preheating method comprises the steps that a molten salt tank preheating system is arranged, preheating temperature rise is carried out, temperature difference control is carried out, and preheating safety protection is carried out; a pipe port is reserved at the topof the molten salt tank, and a gas furnace is connected in through a temporary pipeline; the bottom of a chimney is sealed, a hole is formed in the lower end of the chimney, and the chimney is inserted into the bottom of the molten salt tank from the top of the molten salt tank or the interior of the reserved hole; exhaust gas of the gas furnace is collected into high-speed airflow to enter the molten salt tank and rotationally flows from top to bottom along the tank wall slowly, so that an aerodynamic field in the tank is disturbed, and the purpose of controlling the preheating temperature difference is achieved; preheating temperature rise control is regulated by a PLC of the gas furnace; and the PLC of the gas furnace and DCS are bridged, the molten salt tank is safely and reliably preheated to the salt injection temperature within a short time, and the safety of the preheating process is ensured.

Description

technical field [0001] The invention belongs to the technical field of photothermal power generation, and in particular relates to a method for preheating a molten salt tank of a heat storage system of a photothermal power station. Background technique [0002] In recent years, many photothermal power stations have sprung up. The relatively mature large-capacity heat storage system has become the top priority for long-term stable power generation in photothermal power stations. The heat storage system of photothermal power stations uses molten salt for heat storage. The molten salt is 60 The mixture of % sodium nitrate and 40% potassium nitrate has a solidification temperature of 221°C and a crystallization temperature of 238°C. The molten salt tank is used as the carrier of the molten salt. The salt tank is preheated to avoid excessive thermal stress and molten salt crystallization in the molten salt tank. However, the current molten salt tank preheating technology is not ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F24S60/30F24S80/00
CPCF24S60/30F24S80/00Y02E10/40
Inventor 代增丽王文刚王洪栋王海莲丁道寒魏盈
Owner SEPCOIII ELECTRIC POWER CONSTR CO LTD
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