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Industrial waste sulfuric acid and Glauber's salt thermal acidolysis apparatus and use method thereof

A technology for waste sulfuric acid and mirabilite, which is applied in the preparation of sulfate/bisulfate, waste treatment, etc., can solve the problems of high energy consumption, environmental pollution by by-product waste, low denitrification capacity and economic benefit, and achieves improved denitration capacity, The effect of reducing waste, saving energy and reducing consumption

Active Publication Date: 2018-06-19
XINJIANG ZHONGTAI CHEM FUKANG ENERGY CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The invention provides a thermal acidolysis device for industrial waste sulfuric acid and Glauber's salt and its use method, which overcomes the shortcomings of the above-mentioned prior art, and can effectively solve the by-products existing in the treatment of industrial waste sulfuric acid and Glauber's salt in the existing chlor-alkali industry. Problems of environmental pollution by waste, high energy consumption, low denitrification capacity and low economic benefits

Method used

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  • Industrial waste sulfuric acid and Glauber's salt thermal acidolysis apparatus and use method thereof

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Embodiment 1

[0020] Embodiment 1: as attached figure 1As shown, the thermal acidolysis device for industrial waste sulfuric acid and Glauber's salt includes a reaction unit and a drying unit, and a feeding pipeline 9 is fixedly installed between the reaction unit and the drying unit. Reaction tank 2, four-effect evaporator 5, tail gas absorption device, centrifuge 8, drying unit including wet silo 10, quantitative screw feeder 12, internal heating fluidized bed 13, bucket elevator 21, suspension vibrating screen 22, Finished product silo 23, Glauber's salt supernatant self-flow pipeline 29 is fixedly installed between the upper part of Glauber's salt dissolution overflow tank 3 and the top of clear nitric acid reaction tank 2, and the lower part of Glauber's salt dissolution overflow tank 3 is fixedly connected with mother liquid water return pipeline 11, The mother liquid water return pipeline 11 is connected with the mother liquid water outlet of the centrifuge 8, and the four-effect eva...

Embodiment 2

[0027] Embodiment 2: as attached figure 1 Shown, the using method of industrial waste sulfuric acid described in embodiment 1 and Glauber's salt thermal acidolysis device is carried out according to the following steps: the first step, at waste sulfuric acid inlet 1, industrial waste sulfuric acid is added to clear nitric acid liquid reaction tank 2 Inside, after the Glauber's salt is heated and dissolved in the Glauber's salt dissolving overflow tank 3, the Glauber's salt supernatant overflows through the supernatant artesian flow line 29 on the upper part of the Glauber's salt dissolving overflow tank 3, and flows into the clearing solution reaction tank 2 by gravity, and the Glauber's salt supernatant React with the industrial waste sulfuric acid in the clear nitric acid reaction tank 2 to obtain a mixed solution containing sodium bisulfate; in the second step, steam enters the four-effect evaporator 5 through the steam line 35, and the liquid delivery pump 4 will contain th...

Embodiment 3

[0032] Embodiment 3: As the optimization of embodiment 2, the volume percentage of industrial waste sulfuric acid is 65% to 85%.

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Abstract

The invention relates to the technical field of chloralkali process membrane denitration, particularly to an industrial waste sulfuric acid and Glauber's salt thermal acidolysis apparatus and a use method thereof. The industrial waste sulfuric acid and Glauber's salt thermal acidolysis apparatus comprises a reaction unit and a drying unit, wherein a material discharge pipeline is fixedly arrangedbetween the reaction unit and the drying unit. According to the present invention, the by-products such as waste sulfuric acid and Glauber's salt in the chloralkali production are used as the reactionraw materials, Glauber's salt is subjected to acidolysis at the high temperature through the thermal acidolysis to generate the sodium bisulfate-rich mixed solution, the sodium bisulfate-rich mixed solution is evaporated with a four-effect evaporator, the sodium bisulfate solid is separated with a centrifuge, and the separated sodium bisulfate solid is dried in a fluidized bed so as to prepare the sodium bisulfate product; and with the industrial waste sulfuric acid and Glauber's salt thermal acidolysis apparatus, the generation of the waste in the chloralkali process production is reduced, and the comprehensive utilization of waste sulfuric acid and Glauber's salt, the recycling of the by-product waste, the energy-saving and consumption-reducing and the improved denitration capacity in the chloralkali process are achieved.

Description

technical field [0001] The invention relates to the technical field of chlor-alkali industrial membrane denitrification, and relates to a thermal acidolysis device for industrial waste sulfuric acid and mirabilite and a use method thereof. Background technique [0002] Glauber's salt is an industrial solid waste produced during the brine refining process in the chlor-alkali industry. It is a common name for sodium sulfate containing crystal water, namely Na 2 SO 4 10H 2 A mixture of O and a small amount of other substances; 70% of sulfuric acid is an industrial hazardous waste produced during the drying process of chlorine and hydrogen chloride. The treatment of industrial waste sulfuric acid and Glauber's salt not only easily causes environmental pollution, but also wastes resources. In order to effectively control the environmental pollution of Glauber's salt and industrial waste sulfuric acid, and use its useful components to create economic benefits, some chlor-alkali...

Claims

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Application Information

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IPC IPC(8): C01D5/02
CPCC01D5/02Y02W30/20
Inventor 宋伟杨秀玲唐湘军裴宝帅黄小虎董建刚祁永强焦欣伟寿培峰
Owner XINJIANG ZHONGTAI CHEM FUKANG ENERGY CO LTD