This invention discloses a multi-effect synthesis apparatus and method for
hydrogen sulfide synthesis. The apparatus has a vertical columnar structure, and its interior is arranged from bottom to top as follows: a first-effect liquid
sulfur synthesis zone, a second-effect gas-liquid two-phase
sulfur synthesis zone, a third-effect compensation synthesis zone, and a condensation and
sulfur replenishment zone. The first-effect liquid sulfur synthesis zone is used for the main reaction of molten sulfur and
hydrogen. The second-effect gas-liquid two-phase sulfur synthesis zone is used for the deep reaction of residual sulfur vapor and
hydrogen. The third-effect compensation synthesis zone is used for the compensation catalytic synthesis of unconverted hydrogen and utilizes
temperature drop to condense and
reflux gaseous sulfur. The condensation and sulfur replenishment zone is equipped with a condensation coil for gradient cooling of the rising gas, causing gaseous sulfur to condense into liquid and fall for reuse. The top of the apparatus corresponding to the condensation and sulfur replenishment zone is equipped with a
hydrogen sulfide gas outlet. This invention has the advantages of low
energy consumption, high
raw material conversion rate, high
utilization rate of sulfur and hydrogen, and high purity of the produced
hydrogen sulfide product.