System and method for improving heat exchange effects of graphite blocks in HCl synthetic furnace with byproduct steam

Abstract

The invention relates to a system and method for improving the heat exchange effects of graphite blocks in an HCl synthetic furnace with byproduct steam. The method comprises the steps that water in a first water tank enters the lower end of a circulating water section of a synthetic furnace after undergoing heat exchange in a heat exchanger, then comes out from the upper end of the circulating water section of the synthetic furnace and returns to the first water tank; hot water in the middle of the circulating water section of the synthetic furnace enters a second water tank, and the hot water in the second water tank returns to the synthetic furnace and generates low-pressure steam under the pressurization action of a first water pump. The system and the method have the beneficial technical effects that the water in the second water tank comes from the middle section of the circulating water in the synthetic furnace and has higher temperature, and the hot water enters the synthetic furnace to generate steam under the pressure of the first water pump, thus effectively utilizing the heat in the circulating water and saving the extra heating cost; pure water is used instead of original industrial water and contains little calcium and magnesium ions and silt, so that scaling and blockage are avoided, thus prolonging the service life of equipment and then greatly reducing the accident danger coefficient and reducing the installation and maintenance costs of the equipment.

Description

technical field [0001] The invention belongs to the field of chlor-alkali, and in particular relates to a system and a method for improving the heat exchange effect of a graphite block of a by-product steam HCl synthesis furnace. Background technique [0002] In the domestic chlor-alkali industry, the graphite block in the combustion section of the synthetic hydrogen chloride by-product steam generally adopts circulating water for heat exchange. The circulating water contains a lot of sediment and calcium and magnesium ions, which may easily cause blockage and scaling of the heat exchange holes of the graphite block at the furnace base. Serious and other hazards cause the high heat released by the combustion of chlorine hydrogen to fail to dissipate, making the base temperature of the synthesis furnace higher. Due to the strict operation index of graphite block, the high temperature of the base of synthesis furnace will cause the graphite block to burst and the resin impregn...

AI Technical Summary

Problems solved by technology

[0002] In the domestic chlor-alkali industry, the graphite block in the combustion section of the synthetic hydrogen chloride by-product steam generally adopts circulating water for heat exchange. The circulating water contains a lot of sediment and calcium and magnesium ions, which may easily cause blockage and scaling of the heat exchange holes of the graphite block at the furnace base. Serious and other hazards, causing the high heat released by the combustion of hydrogen chloride cannot be dissipated, making the base temperature of the synthesis furnace higher

Due to the strict operation index of the graphite block, the high temperature of the base of the synthesis furnace will cause the graphite block to burst and the resin impregnated on the surface of the graphite block to fall off

[0003] The bursting of the graphite block causes a large amount of circulating water to enter the furnace, causing the furnace to explode. If the operator responds slowly, it will cause serious overchlorination and cause the vinyl chloride synthesis converter to explode, causing huge losses to the chlor-alkali manufacturer.

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