A hydrochloric acid regeneration exhaust system

Abstract

The present invention proposes a hydrochloric acid regeneration exhaust system, including an acid storage tank, a first water-sealed tank, a heat exchanger, a leaching tower, a temporary storage tank, a first neutralization tank and an ammonia storage tank, and the top of the acid storage tank The pipeline is connected to the first water-sealed tank with a positive water seal, the liquid outlet of the acid storage tank is connected to the liquid inlet of the leaching tower through a heat exchanger, and the liquid outlet of the leaching tower is connected to the temporary storage tank. , the temporary storage tank communicates with the first neutralization tank, the liquid outlet of the ammonia storage tank communicates with the liquid inlet of the first neutralization tank, and also includes a first breather valve, the top of the acid storage tank passes through the first The breathing valve communicates with the outside world; the invention has a simple structure, avoids tail gas mixing, and meets air discharge requirements around the equipment, is safe and environmentally friendly, and has good application prospects.

Description

technical field [0001] The invention relates to the technical field of metal processing auxiliary equipment, in particular to a hydrochloric acid regeneration exhaust system. Background technique [0002] At present, the conventional cold-rolled hydrochloric acid regeneration system is generally divided into two parts. The first part is to use chemical methods for desiliconization, and the second part is to use spray roasting to thermally decompose the hydrochloric acid waste liquid to regenerate hydrochloric acid and iron oxide powder. , the use of this system can ensure the provision of qualified regenerated hydrochloric acid for pickling, and at the same time produce a large amount of high value-added iron oxide powder. [0003] However, the above-mentioned system has certain safety risks in practical application. Since there are multiple devices that need to be exhausted in the system, in order to ensure that the exhaust gas meets the emission requirements, it is necessa...

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Problems solved by technology

[0003] However, the above-mentioned system has certain safety risks in practical application. Since there are multiple devices that need to be exhausted in the system, in order to ensure that the exhaust gas meets the emission requirements, it is necessary to perform uniform washing and discharge of the exhaust gas. The existing system shares a Set of washing and discharge equipment, which leads to the possibility that the gases generated in different processing steps may enter into each other, and hydrogen gas will be generated in the process of reaction and acid rolling. If the gas escapes, it will easily cause safety hazards and cause explosion accidents

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