Liquid caustic soda automatic flowing system during production of flake caustic soda

Abstract

The invention discloses a liquid caustic soda automatic flowing system during production of flake caustic soda. The liquid caustic soda automatic flowing system comprises a third-stage pre-heating boiler (4), a second-stage pre-heating boiler (6) and a first-stage pre-heating boiler (7), wherein the third-stage pre-heating boiler (4), the second-stage pre-heating boiler (6) and the first-stage pre-heating boiler (7) are installed in a stepped manner from high to low in sequence; liquid caustic soda flows into the bottom of the third-stage pre-heating boiler (4) through a liquid inlet pipe (2) and a third-stage pre-heating boiler guide cylinder (3); after being filled, liquid flows into the bottom of the second-stage pre-heating boiler (6) through a second-stage pre-heating boiler guide cylinder (5); after being filled in the second-stage pre-heating boiler (6), liquid flows into the bottom of the first-stage pre-heating boiler (7) through a first-stage pre-heating boiler guide cylinder (8); and, after being filled in the first-stage pre-heating boiler (7), liquid flows into a caustic soda melting boiler (12) through a caustic soda melting boiler inlet flow pipe (9). According to the invention, the liquid caustic soda automatic flowing system is safe and simple to operate; after technological improvement, liquid caustic soda automatically flows; a suspended pump is not used for pouring liquid any longer; a liquid level is also unnecessary to observe on a cooking bench for a long time; and the liquid flows into the caustic soda melting boiler (12).

Description

technical field [0001] The invention relates to a self-flowing liquid caustic system in the production process of caustic soda. Background technique [0002] The caustic soda melting process in the cauldron is direct burning with an open flame, and the liquid caustic soda with a concentration of 32% or 50% is heated and evaporated to 460°C. After the water evaporates, a molten caustic soda with a concentration of 99% or 96% can be obtained and cooled. The last is the finished solid caustic soda. In order to save energy, most of the heat of the coal flue gas is absorbed. Heating is carried out by means of preheating, so that the water evaporates continuously. The labor intensity of the traditional pouring operation process is high; there are many safety hazards; the operating conditions of the workers are poor (baking in the high temperature area); the suspension pump is seriously corroded, which increases the maintenance workload and the maintenance cost; the heat loss is ...

AI Technical Summary

Problems solved by technology

The labor intensity of the traditional pouring operation process is high; there are many safety hazards; the operating conditions of the workers are poor (baking in the high temperature area); the suspension pump is seriously corroded, which increases the maintenance workload and the maintenance cost; the heat loss is large; the production cycle is long

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