High-temperature molten salt furnace with two stages of combustors

Abstract

The invention discloses a high-temperature molten salt furnace with two stages of combustors. The high-temperature molten salt furnace comprises a furnace body, and an outer coil pipe, an inner coil pipe, a first-stage combustor and a second-stage combustor which are arranged in the furnace body, the outer coil pipe and the inner coil pipe are filled with fused salt, the first-stage combustor is located in the center of the base, the second-stage combustors are located within the 1 / 4 range of the upper portion of the furnace body, and the two or more second-stage combustors are evenly and symmetrically arranged in the radial direction; the secondary combustor is of a sleeve structure and comprises a main spraying hole facing the interior of the inner coil pipe, an interlayer spraying hole and a suction hole, wherein the interlayer spraying hole and the suction hole are located between the outer coil pipe and the inner coil pipe. Through the introduction of the second-stage combustor, the interlayer spraying hole and the suction hole, the full combustion of high-temperature flue gas can be realized, the combustion efficiency is improved, the generation of high-temperature nitrogen oxide can be reduced, and due to the adjusting effect of the second-stage combustor, the temperature of molten salt in the molten salt coil pipe is controllable, local high temperature is avoided, and the service life of the molten salt coil pipe is prolonged. Therefore, the temperature of molten salt at the outlet of the molten salt furnace is more than 590 DEG C.

Description

technical field [0001] The invention belongs to the field of high-temperature molten salt furnaces, in particular to a high-temperature molten salt furnace with two-stage burners. Background technique [0002] At present, the molten salt temperature at the outlet of the molten salt furnace is usually around 400°C, and it is difficult to achieve an outlet molten salt temperature above 590°C. The temperature of the molten salt outlet is not high. On the one hand, the efficiency is not high due to the unreasonable pipe layout of the molten salt furnace; Large lead to insufficient flue gas output in the final stage, unable to continue to increase the temperature of molten salt. [0003] In order to realize the high-temperature molten salt furnace, the following representative molten salt furnace design schemes have appeared. [0004] (1) The Chinese invention patent with the publication number CN 209726798 U discloses an outlet molten salt temperature of 550°C, and adopts a cy...

AI Technical Summary

Problems solved by technology

[0007] In order to solve the problem of low molten salt temperature at the outlet of the molten salt furnace, improve the combustion efficiency of the molten salt furnace, and reduce the technical problems of NOx emissions due to combustion, the present invention proposes a high-temperature molten salt furnace with two-stage burners, specifically The technical solution is as follows:

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