Synthetic device for aluminum sulfate and method for synthesizing aluminum sulfate using it

Abstract

The invention provides a device for synthesizing aluminum sulfate. The device comprises a first water inlet pipe, a second water inlet pipe, a low-pressure steam pipe, an aluminum powder feeding pipe, a concentrated sulfuric acid feeding pipe, a condensed water pipe, a hot water storage tank, a reactor, a slag cutting pot, an intermediate storage tank, a precision filter and an aluminum sulfate storage tank, wherein the hot water storage tank, the reactor, the slag cutting pot, the intermediate storage tank, the precision filter and the aluminum sulfate storage tank are connected in sequence; a coiled pipe is arranged on the inner wall of the reactor; an inlet and an outlet of the coiled pipe are formed in the outer wall of the reactor; one end of the low-pressure steam pipe is connected with the inlet of the coiled pipe; one end of the condensed water pipe is connected with the outlet of the coiled pipe; one end of the hot water storage tank is connected with the inlet of the coiled pipe, and the other end of the hot water storage tank is connected with the first water inlet pipe; and one end of the second water inlet pipe is connected with the outlet of the coiled pipe. The invention further provides a method for synthesizing aluminum sulfate by using the device. The device and the method provided by the invention have the advantages of operation stability and security and high conversion rate of raw materials. By adopting the device and the method, the loss of sulfuric acid and steam can be reduced greatly, and the pollution to air can be alleviated significantly, and the energy consumption of the device is reduced.

Description

technical field [0001] The invention relates to the field of chemical industry, in particular to an aluminum sulfate synthesis device and method. Background technique [0002] The traditional preparation of aluminum sulfate is prepared by directly raising the temperature of steam, and reacting aluminum hydroxide powder and concentrated sulfuric acid under normal pressure and boiling state for about 4 hours. Because of the reaction under normal pressure, during the reaction process, as the temperature of the medium increases, a large amount of acid-containing and water-containing tail gas will start to evaporate and escape in the reactor. When the temperature reaches boiling, a large amount of acid-containing tail gas will be discharged for several hours. , until the end of the reaction. The above-mentioned preparation process has the following disadvantages: 1. The exhaust gas containing acid and water is large, causing serious acid pollution and thermal pollution of the en...

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Problems solved by technology

[0004] Based on this, it is necessary to provide an advanced and efficient sulfuric acid with high raw material utilization rate and low device material consumption and energy consumption in view of the problems of backward production technology, low production efficiency, low raw material utilization rate, and high device material consumption and energy consumption in the traditional aluminum sulfate preparation method. Aluminum synthesis device

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