Coke oven flue gas waste heat ammonia distillation reboiler

Abstract

The invention, belonging to the technical field of ammonia distillation reboilers, provides a device capable of effectively utilizing coke oven flue gas waste heat and simultaneously reducing waste water discharge capacity in the ammonia distillation process. The device is characterized in that a plurality of evaporation tubes are vertically arranged between an upper tube plate and a lower tube plate, one sides of the evaporation tubes are provided with flue gas inlets, and the other ends of the evaporation tubes are provided with flue gas outlets; the upper tube plate and the lower tube plate form a gas-liquid separation chamber, the top end of the gas-liquid separation chamber is provided with a plurality of a steam outlets, the side surface of the gas-liquid separation chamber is provided with a water inlet, and the central portion of the other side surface of the gas-liquid separation chamber is provided with an overflow gate; the lower tube plate and a lower shell form a water settling chamber, the bottom of the water settling chamber is provided with at least one sewage draining exit. According to the invention, a large amount of soft water and energy are saved, and the sewage discharge capacity is reduced.

Description

technical field [0001] The invention discloses a coke oven flue gas residual heat ammonia distillation reboiler and belongs to the technical field of ammonia distillation reboilers. Background technique [0002] Ammonia distillation is to use water vapor to steam the ammonia in the raw ammonia water, so that the ammonia content in the treated ammonia water is lower to facilitate the operation of the biochemical device, and at the same time, a higher concentration of ammonia vapor is obtained. According to whether the external water vapor directly enters the ammonia distillation tower as the distillation medium, the ammonia distillation process is divided into direct ammonia distillation process and indirect ammonia distillation process. The process in which the external water vapor directly enters the ammonia distillation tower as the distillation medium is called the direct ammonia distillation process. The process of heating the wastewater at the bottom of the ammonia dis...

AI Technical Summary

Problems solved by technology

[0004] Gas tube furnace heating wastewater process and thermal oil heating wastewater process both use gas heating to indirectly heat wastewater, which will consume a lot of energy

In the steam heating wastewater process, the heating reboiler needs to use soft water to generate heating steam, which requires a large amount of soft water, and also needs to use gas for vaporization, which will consume a lot of energy and also need to use a lot of water

At the same time, the flue gas produced in the coke oven during production is usually discharged out of the chimney without treatment, resulting in a large waste of flue gas heat

Images