Two-in-one graphite synthesis furnace with two pressure level steam by-products at the same time

Abstract

The invention discloses a two-in-one graphite synthesis furnace with two pressure level steam by-products at the same time. The synthesis furnace comprises, from bottom up, a lamp holder, a lower graphite furnace cylinder section, a lower heat taking section, an upper heat taking section and an upper head section in order, a blasting disk is mounted at the top of the synthesis furnace, a graphite heat exchange block is disposed in the upper heat taking section, a steel shell is arranged outside the upper heat taking section, gas circulates along the vertical hole direction of the graphite heat exchange block, water circulates along the horizontal hole direction, the hollow jacket of the lower heat taking section and the hollow jacket of the upper heat taking section are respectively connected to a flash tank, so that steam of two different pressures can be output at the same time respectively, and the lower graphite furnace cylinder section consists of a lower graphite furnace cylinder and a steel shell thereof. The two-in-one graphite synthesis furnace provided by the invention can obviously improve the energy saving effect while improving the pressure of the by-product steam.

Description

technical field [0001] The invention relates to a synthesis furnace, in particular to a two-in-one graphite synthesis furnace which simultaneously by-produces steam of two pressure levels. Background technique [0002] When some gases are synthesized by combustion, they will release a large amount of heat of combustion and form high-temperature gases. For example, the temperature of HCl gas can reach 1800-2500 ° C, and the synthesis of P 2 o 5 The gas temperature can reach 1000°C. When using this synthesis gas, a cooler was used after the synthesis furnace (or combustion tower) to reduce the gas temperature (for example, to 40°C or even lower). And because the acidic solution formed by dissolving the synthesis gas in water is highly corrosive, graphite synthesis furnaces with excellent thermal conductivity and corrosion resistance are quickly used. In the 1980s, the combination of synthesis and cooling equipment into one equipment has been rapidly promoted, and it is call...

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Problems solved by technology

[0003] However, only one level of saturated water vapor by-product has the following disadvantages: (1) When the steam pressure is less than 0.8MPa, its application area is relatively small, and it cannot be connected to the grid; (2) When the steam pressure is high (especially the steam pressure ≥1.6MPa medium pressure), the temperature of a large number of furnace leaving the heat-taking furnace tube is still relatively high (for example, when the pressure of by-product steam is 1.6MPa, the temperature of HCl gas leaving the steel furnace tube section can be >800-1000°C) synthesis The heat of the gas not only cannot be recycled, but also increases the consumption of cooling water

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