Large-scale guiding tank for electric heaters of fused salt storage tank

Abstract

The invention belongs to the field of chemical machinery and particularly relates to a large-scale guiding tank for electric heaters of a fused salt storage tank. The guiding tank comprises two side boards. Supporting boards are vertically distributed between the two side boards. A front end board and a rear end board are arranged at the front end and the rear end of a tank body correspondingly. Both the front end board and the rear end board are fixed between the two side boards. A horizontal baffle I and two horizontal baffles II are longitudinally arranged between the two side boards. The horizontal baffle I is located above the horizontal baffles II. The horizontal baffle I is welded to the front end board, the rear end board and the supporting boards. The two horizontal baffles II are welded to the two side boards, the front end board and the rear end board. Sleeve holes are formed in the position, corresponding to the same center line, of the front end board and the supporting boards. By means of the 'chimney effect' produced by density declining caused by temperature rising of gas or fused salt in the guiding tank because of heating, the cyclic heating process of the gas or fused salt in the storage tank is strengthened, radiation channels of electric heater sleeves directly to a tank bottom board are cut off, and the overtemperature of the tank bottom board under the heaters is avoided.

Description

technical field [0001] The invention relates to a diversion box of an electric heater for a large-scale molten salt storage tank, belonging to the field of chemical machinery. Background technique [0002] The molten salt storage tank is the molten salt storage equipment in the tower solar thermal power generation project. There are cold molten salt tanks and hot molten salt tanks, and the design temperatures are 400°C and 575°C respectively. Depending on the power generation capacity, the volume of molten salt storage tanks ranges from hundreds of cubic meters to thousands of cubic meters, or even larger. [0003] Before the molten salt storage tank is put into use, it must be preheated to above the melting temperature of the molten salt, usually close to 300°C, and then the molten salt can be added. The density of molten salt decreases with the increase of temperature. During the storage of molten salt, due to heat dissipation and other reasons, the temperature of the up...

AI Technical Summary

Problems solved by technology

In the preheating stage before the storage tank is put into use, if the electric heater is relatively close to the bottom of the tank, due to the radiation effect of the heater, the temperature of the bottom plate of the tank directly below each heater is higher than that of other areas, resulting in uneven temperature of the bottom plate of the tank , the excessive expansion difference caused by the temperature difference will crack the weld seam of the tank bottom plate; Use the required temperature, and cause the temperature difference between the tank wall and the tank bottom to exceed the allowable value

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