a dissolution system

Abstract

The invention discloses a stripping system, comprising: a stripping unit consisting of a flash evaporation unit and a stripping autoclave unit, a preheating casing and a diaphragm pump, the diaphragm pump is connected to the preheating casing through a pipeline, and the preheating The casing is connected to the dissolution autoclave unit, and a slurry regulating valve is added to the connecting pipeline between the final outlet of the dissolution autoclave unit and the flash evaporation unit. The dissolution system of the present invention eliminates the less effective pulse buffer and at the same time eliminates the vibration of the outlet pipeline of the diaphragm pump due to the pulse, which reduces the high investment and operating costs caused by the pulse buffer; simplifies the operation, Diaphragm pumps can increase flow at will and make the system safe and reliable.

Description

technical field [0001] The invention relates to a stripping system, in particular to a stripping system without a pulse buffer. Background technique [0002] The traditional high-pressure dissolution system for alumina production in the Bayer process is equipped with a pulse buffer at the outlet of the diaphragm pump without exception, and even uses pipeline preheating and pressure cooker. A pulse buffer is also installed between them. The pulse snubber is used to eliminate the vibration caused by the discharge pulse of the diaphragm pump. Diaphragm pump is a piston type volumetric pump, each pump has at least 2 pistons, its reciprocating strokes cause pulse flow of slurry, this pulse often causes serious vibration of diaphragm pump outlet pipe and even preheating casing , And then cause the piping system and plant vibration. Use the material level automatic control interlock of the pulse buffer to control whether the pulse buffer is inflated or exhausted. When the materi...

AI Technical Summary

Problems solved by technology

[0003] 1. Large investment, each dissolution unit is equipped with 2 pulse buffers, 6 radioactive source level gauges, 6 pneumatic valves, 1 high-pressure air compressor, 1 high-pressure air storage tank, and matching safety valves, Instrumentation, etc., with an investment of about 6 million yuan

[0004] 2. High operating costs. The annual power consumption of a high-pressure air compressor is about 150,000 yuan. The annual maintenance, cleaning, and calibration costs of air compressors, pulse buffers, and instruments are about 1 million yuan. Various inspections, storage, etc. cost 100,000 yuan, and it is not safe

[0005] 3. From the long-term production practice, it is found that although the pulse buffer is configured, when the unit is started, that is, when the diaphragm pump starts to supply material to the unit, when the unit pressure is lower than the pressure of the nitrogen bag at the outlet of the diaphragm pump, the flow rate of the diaphragm pump cannot exceed a certain value. A specific value, such as a factory is 170m 3 / h, otherwise the vibration of the outlet pipeline of the diaphragm pump is very serious, and even the pipeline can be broken, even if the diaphragm pump has 520m 3 The ability of / h can't easily increase the traffic

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