Application method of low-temperature refrigerating unit in low-gas-concentration acid making system

Abstract

The invention discloses an application method of a low-temperature refrigerating unit in a low-gas-concentration acid making system. The application method specifically comprises the following steps that 1, a secondary packed tower in the low-gas-concentration acid making system is connected with a dilute acid plate heat exchanger; according to the application method of the low-temperature refrigerating unit in the low-gas-concentration acid making system, the low-temperature refrigerating unit is applied to the low-gas-concentration acid making system so that the operability of the acid making system is greatly improved, the acid water balance capacity of a dry absorption part of the acid making system is improved, and the refrigerating unit can provide low-temperature water of 9 DEG C for the system during full-load operation; hard requirement of the acid making system on SO2 is greatly reduced; the main power source of the refrigerating unit is low-pressure steam, and the steam withthe pressure can be completely used for preheating the steam after power generation at the front end so that the economic benefit brought by power generation is not influenced, the steam utilizationrate is increased, the operation cost is greatly reduced, and the machine can be started and stopped by one key; automatic adjustment and other functions are achieved, and extra labor amount is not increased.

Description

technical field [0001] The invention relates to the technical field of refrigeration equipment, in particular to an application method of a low-temperature refrigeration unit in a low-gas concentration acid production system. Background technique [0002] Lead waste mainly comes from battery plates, cable armor, pipes, lead bullets and lead plates. As long as these lead wastes are collected and sent to a secondary lead factory for remelting and resmelting, refined lead, soft lead and various lead can be produced. Lead-based alloys, lead recovered from waste batteries and cable sheaths, contain a small amount of antimony and other metals, this secondary lead is generally still sold to battery manufacturers, and the secondary lead containing tin is mostly reused to make welding rods, bearing alloys and other lead Tin alloys, lead in general gasoline and fuel cannot be recycled, and is the main factor of lead causing environmental pollution. Lead in foil, welding rods, heat tre...

AI Technical Summary

Problems solved by technology

[0005] Aiming at the deficiencies of the prior art, the present invention provides an application method of a low-temperature refrigerating unit in a low-gas-concentration acid production system, which solves the problem that the existing low-gas-concentration acid production system has a high rigid index requirement for gas concentration. , and for the high cost of environmental protection treatment of secondary lead smelting

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