Sulfuric acid purification plate heat exchanger cleaning-free system and using method

Abstract

The invention discloses a sulfuric acid purification plate heat exchanger cleaning-free system and a using method, and belongs to the technical field of heat exchangers. The sulfuric acid purification plate heat exchanger cleaning-free system comprises a first production system and a second production system, wherein the first production system comprises a first dilute sulfuric acid injection pipe and a first water cooling tower circulating water injection pipe, the tail end of the first dilute sulfuric acid injection pipe is fixedly connected to a plate heat exchanger, a first valve is fixedly connected to the first dilute sulfuric acid injection pipe, a first dilute sulfuric acid discharging pipe is fixedly connected to the plate heat exchanger, and a third valve is fixedly connected to the first dilute sulfuric acid discharging pipe. According to the sulfuric acid purification plate heat exchanger cleaning-free system and the using method, the water side and the acid side of the plate heat exchanger can be exchanged through opening and closing of the valves, the heat exchange effect can reach normal within 15 minutes of exchange, the maintenance time is saved, a cleaning agent and manpower are saved, and the economic benefit is increased.

Description

technical field [0001] The invention relates to the technical field of heat exchangers, in particular to a no-cleaning system and a use method for sulfuric acid purification plate heat exchangers. Background technique [0002] In the production of sulfuric acid, the furnace gas needs to be pickled and purified to remove dust, and at the same time, the temperature of the furnace gas is cooled by adiabatic evaporation, and a large amount of water vapor is generated at this time. This part of water vapor is mixed in the furnace gas and will be removed in the subsequent packed tower. In the packed tower, the furnace gas is in direct contact with the circulating dilute sulfuric acid for heat exchange, and the water vapor is condensed into water, which is removed from the furnace gas together with impurities and left in the circulating acid. In this process, the circulating dilute sulfuric acid absorbs the latent heat of vaporization of water vapor, and a plate heat exchanger is ...

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Problems solved by technology

[0004] The purpose of the present invention is to solve the problems of long time and poor effect of cleaning scale in plate heat exchangers, and propose a no-cleaning system for purifying plate heat exchangers with sulfuric acid and its use method, which can achieve interchangeable plate heat exchangers through valve switches in the production process. The water side and the acid side of the heater, and the heat exchange effect reaches normal within 15 minutes of the exchange, which saves maintenance time, saves cleaning agents and labor, and increases economic benefits

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