Device for producing sulfuric acid by using gypsum

Abstract

A device for producing sulfuric acid by using gypsum comprises a calcining kiln, a humidifying room, a reaction room, a condensation pipe and a sulfuric acid receiver, wherein a spiral preheating pipe is arranged on the outer wall of the calcining kiln; the lower end of the spiral preheating pipe is connected with a discharging hopper which is provided with a blower nozzle; a spiral preheating pipe at the upper part of the calcining kiln is provided with a discharging port; the top of the calcining kiln is connected with the humidifying room through a pipe which is provided with a gas pump; the humidifying room is connected with the reaction room through a pipe; an electronic beam generation device is arranged on the outer wall of the reaction room; an outlet of the reaction room is connected with the condensation pipe through a pipe; and the top of the condensation pipe is connected with the gas pump through a pipe, and the bottom of the condensation pipe is connected with the sulfuric acid receiver. Through adoption of the device for producing the sulfuric acid by using the gypsum, whole reaction process space is totally sealed, no solid fuel is adopted, and no secondary pollution impurity is introduced in, so that the energy conservation and the environmental friendliness are achieved; and the absorptivity of sulfur dioxide is high up to 99 percent.

Description

technical field [0001] The invention relates to a sulfuric acid production device, in particular to a device for producing sulfuric acid by utilizing gypsum. Background technique [0002] At present, sulfuric acid or pyrite is mostly used as raw material in the production of sulfuric acid in my country. With the decreasing of sulfur and pyrite resources, the price also rises accordingly, and the production cost of sulfuric acid gradually increases. It is imperative to find new raw materials to produce sulfuric acid. At the same time, with the improvement of sulfuric acid production materials and processes, the equipment used to produce sulfuric acid also has a diversified development trend. [0003] Chinese invention patent application 200580008034.4 discloses a device for preparing sulfuric acid, which uses secondary absorption equipment, mainly including a primary absorber and a secondary absorber, but this equipment cannot essentially solve the problem of environmental p...

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Problems solved by technology

[0003] Chinese invention patent application 200580008034.4 discloses a device for preparing sulfuric acid, which uses secondary absorption equipment, mainly including a primary absorber and a secondary absorber, but this equipment cannot essentially solve the problem of environmental pollution caused by exhaust gas

[0004] Chinese invention patent application 201010208303.4 discloses a method for reducing SO in the tail gas of sulfuric acid production 2 content, the invention adds a tail gas desulfurization device consisting of an adsorption tower and a desorption tower between the second acid absorption tower of the existing sulfuric acid plant and the tail gas discharge chimney. The active coke used in it can be recycled, but this equipment cannot Absorb a large amount of SO in the tail gas 2 , SO in exhaust gas 2 The reduction of the content is limited, and the problem of environmental pollution cannot be completely solved.

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