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Method for cleanly producing food additive sulfuric acid

A food additive, cleaner production technology, applied in chemical instruments and methods, sulfur compounds, sustainable manufacturing/processing, etc., can solve the problems of inability to achieve cleaner production, low energy recovery and utilization, high energy consumption, etc., and achieve low maintenance costs. , improve the utilization efficiency and increase the effect of economic benefits

Active Publication Date: 2015-12-09
CHIPING COUNTY MINGDA CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a method for the clean production of food additive sulfuric acid in view of the problems that the existing production method consumes a lot of energy, has low energy recovery and utilization, and cannot realize clean production.

Method used

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Embodiment Construction

[0020] The present invention will be described in detail below by way of examples.

[0021] A method for clean production of food additive sulfuric acid, comprising the following steps:

[0022] (1) Sulfur melting: the solid sulfur with a content of 99.99% is sent into the sulfur melting tank through a bucket elevator and a belt conveyor. A low-pressure steam heating tube is installed in the sulfur melting tank, which is indirectly heated by 0.3-0.51MPa steam Melt solid sulfur into liquid, keep the sulfur in a molten state at 125-148°C; the melted liquid flows from the overflow port into the clarification tank with diatomaceous earth to remove some impurities; then use the crude sulfur pump to pump the liquid The sulfur is sent to the liquid sulfur filter to filter out impurities, and finally the liquid sulfur from which the impurities have been filtered is sent to the refined sulfur tank for sedimentation, and the liquid sulfur after further removal of impurities is sent to t...

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Abstract

The invention belongs to the technical field of food-grade sulfuric acid production, in particular relates to a method for cleanly producing food additive sulfuric acid. The method for cleanly producing food additive sulfuric acid comprises the following steps: (1) sulfur melting; (2) sulfur burning; (3) conversion; (4) absorption and drying; (5) waste heat recovery. The method for cleanly producing food additive sulfuric acid aims at reutilizing waste heat and residual pressure during sulfuric acid production, is based on the purpose of further improving the waste heat and residual pressure utilizing efficiency and adopts hot steam to do work to a back-pressure steam turbine to drive an air blower, and the low-pressure steam after doing work is sold externally. Thereby, the electricity used by the air blower is greatly reduced, the steam after doing work is fully utilized, and not only can the energy waste be avoided, but also economic benefits are created.

Description

technical field [0001] The invention belongs to the technical field of food-grade sulfuric acid production, and in particular relates to a method for clean production of food additive sulfuric acid. Background technique [0002] Food additive sulfuric acid is a transparent colorless oily liquid; highly corrosive; non-volatile; strong hygroscopicity; miscible with water and ethanol, while releasing a lot of heat and shrinking in size. Certain sulfuric acid concentrations in industrial products are measured in degrees Baume (°Bé) and H 2 SO 4 Percentage concentration (93.0% or more) means that the concentration of general products is 60°Bé and 66°Bé, which are equivalent to 77.67% and 93.19%H 2 SO 4 and 98%H 2 SO 4 ; Relative density varies with concentration, generally 1.8342. The melting point is 10.46°C, and the boiling point is 210-338°C. Food additive Sulfuric acid is an acidulant or sour agent, used as a processing aid for alcoholic beverages, cheese, etc.; used t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B17/74
CPCY02P20/10Y02P20/129
Inventor 成其明
Owner CHIPING COUNTY MINGDA CHEM CO LTD
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