Corrosion-resistant falling-film evaporator, dilute sulfuric acid concentration system and process and application of system
A technology of falling film evaporator and dilute sulfuric acid, which is applied in evaporation, chemical instruments and methods, chemical industry, etc., can solve the problems of high energy consumption and high cost, achieve high equipment operation flexibility, avoid waste, and realize environmental protection and emission reduction Effect
Pending Publication Date: 2019-04-30
何文旭
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Problems solved by technology
[0003] The technical problem to be solved by the present invention is to provide a corrosion-resistant falling film evaporator, dilute sulfuric acid concentration system and its process and application in order to overcome the defects of high energy consumption and high cost of existing dilute sulfuric acid concentration equipment
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Embodiment 1
[0061] Such as figure 1 The dilute sulfuric acid concentration system shown includes dilute sulfuric acid storage tank I, dilute sulfuric acid pump II, corrosion-resistant falling film evaporator III, acid water vapor condenser IV, acid water recovery tank V and finished acid storage tank VI. Among them, dilute sulfuric acid pump II is connected with flowmeter A and regulating valve B, and the structure of corrosion-resistant falling film evaporation III is as follows: figure 2 shown, which includes:
[0062] Top cover 1, top cover 1 is provided with top cavity 11, dilute sulfuric acid inlet 12, first acidic water vapor outlet 13 and manhole 10, and the inner surface of top cover 1 is provided with polytetrafluoroethylene layer;
[0063] Liquid collection chamber 2, liquid collection chamber 2 is provided with liquid collection chamber 21, finished acid outlet 22, second acid water vapor outlet 23 and manhole 10, the inner surface of liquid collection chamber 2 is provided w...
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The invention discloses a corrosion-resistant falling-film evaporator, a dilute sulfuric acid concentration system and a process and an application of the system. The corrosion-resistant falling-filmevaporator comprises a top cover, a liquid collecting chamber and a shell; an accommodation chamber of the shell is internally provided with an upper tube plate, a lower tube plate and an evaporatingtube. The dilute sulfuric acid concentration system includes a dilute sulfuric acid storage tank, the corrosion-resistant falling-film evaporator, an acid water vapor condenser, an acid water recoverytank and a finished product acid storage tank. The dilute sulfuric acid concentration system can concentrate sulfuric acid with any concentration of 95% or less to the required concentration according to the demand, and the operation flexibility of the device is large. The dilute sulfuric acid concentration system can be applied to a purification treatment process of hot furnace gas, waste heat of the hot furnace gas can be used for concentrating dilute sulfuric acid, and thus dual benefits of energy saving and environmental protection are achieved.
Description
technical field [0001] The invention relates to a corrosion-resistant falling film evaporator, a dilute sulfuric acid concentration system and its technology and application. Background technique [0002] In chemical industry, metallurgy, thermal power and other industrial production, the hot furnace gas usually contains a certain amount of SO 2 , SO 3 After acid gas and moisture, the high-temperature potential heat of the hot furnace gas is recovered by boilers, economizers and other equipment, the hot furnace gas is then processed through the following process: wet purification→demisting→drying→SO 2 converted to SO 3 → After being absorbed by the absorption system, concentrated sulfuric acid is produced, and the tail gas is discharged up to the standard. In order to avoid dew point corrosion, the temperature of the furnace gas exiting the economizer or dry dust collector in the above process is generally controlled at about 250 ° C ~ 300 ° C, and then enters the wet pur...
Claims
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IPC IPC(8): B01D1/22C01B17/88
CPCB01D1/22C01B17/88Y02P20/129Y02P20/10
Inventor 何文旭
Owner 何文旭