The utility model relates to a
deuterium-depleted water rectifying
tower falling film
reboiler which comprises a tube box, a
barrel and a lower sealing head which are sequentially arranged from top to bottom, a liquid
distributor is arranged in the tube box, a falling film head is arranged below the liquid
distributor, an extraction opening and a monitoring opening are formed in the outer side of the tube box, a baffle plate and a heat exchange tube are arranged in the
barrel, and the lower sealing head is arranged below the baffle plate. The
deuterium-depleted water rectifying
tower is arranged at the
tower bottom of the rectifying tower, a tower kettle shell and an external pipeline of the rectifying tower are omitted, the
heat transfer coefficient is increased, the
retention time of a heating section is prolonged, scaling is not prone to occurring, the service life is long, the maintenance cost is low, and
energy consumption in the
deuterium-depleted water rectifying process is reduced while the equipment cost is reduced; the lining is arranged in the conical end socket, so that the
liquid storage amount of the end socket can be reduced, and the concentration and the product yield of the deuterium-depleted
aquatic product are improved; and the liquid
distributor and the product
discharge port are arranged at the upper end of the tube box, so that the effective film forming and
heat transfer effects of the falling film
reboiler are better ensured.