Method for preparing sulfuric acid by burning sulfur-containing waste liquid
A technology for producing sulfuric acid and waste liquid, applied in chemical instruments and methods, sulfur compounds, sustainable manufacturing/processing, etc., can solve the problems of incomplete treatment of sulfur-containing waste liquid, environmental pollution, etc. The effect of short process and high conversion rate
Inactive Publication Date: 2017-02-08
NANJING HAILU CHEM TECH
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[0003] In order to overcome the above deficiencies, the present invention provides a method for producing sulfuric acid from sulfur-containing waste liquid. The sulfur-containing waste liquid is sent to an incinerator for incineration, and ammonia salt, elemental sulfur, and organic matter in the sulfur-containing waste liquid are decomposed at high temperature. , Oxidation reaction, the furnace gas containing sulfur dioxide is used to produce commercial grade sulfuric acid, to solve the problem of environmental pollution caused by incomplete treatment of sulfur-containing waste liquid
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[0014] The present invention will be further described below in conjunction with the examples, but the protection scope of the present invention should not be limited thereby.
[0015] A method for producing sulfuric acid by burning sulfur-containing waste liquid, comprising the following steps:
[0016] a) Put the sulfur-containing waste liquid into the incinerator for incineration at a temperature of 800-1300°C, oxidize the sulfur element in the sulfur-containing waste liquid to SO2, and generate high-temperature gas containing SO2, and the cold air from the combustion fan will pass through After the air preheater exchanges heat with the high-temperature furnace gas, the temperature rises to 800°C and is used as the combustion-supporting gas of the incinerator. The supplementary fuel of the incinerator is at least one of gas fuel, liquid fuel or solid fuel, and the supplementary fuel is sulfur or hydrogen sulfide;
[0017] b) using a waste heat boiler to recover waste heat ...
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The invention discloses a method for preparing sulfuric acid by burning sulfur-containing waste liquid. The method is characterized in that sulfur-containing waste liquid is sent to an incinerator for being burned, under high temperature, ammonia salt, elemental sulfur and an organic matter in the sulfur-containing waste liquid are subjected to decomposition and an oxidation reaction, and sulfur dioxide-containing furnace gas is used for producing commercial-grade sulfuric acid. The method has the beneficial effect that high temperature gas generated by burning the waste liquid is employed, a waste heat boiler is used for recovering waste heat, steam is generated, heat energy utilization rate is high; the gas cooled through the waste heat boiler is introduced into a two-stage air preheater, after the furnace gas is cooed, the furnace gas is introduced into a purifying workshop section dynamic wave scrubber, fuel consumption is reduced, the SO2 concentration of the gas generated through combustion can be effectively increased, so that sulfuric acid can be prepared, a contact method is employed for preparing sulfuric acid, the SO2 conversion rate is high, process flow is short, operation is simple, a tail gas absorption process is set, residual SO2, escape NH3 and H2SO4 mist in the acid making tail gas can be effectively removed, and the index of a harmful object in the tail gas can be discharged when reaches the standard.
Description
technical field [0001] The invention belongs to the field of waste liquid recovery and treatment, and in particular relates to a method for producing sulfuric acid by incinerating sulfur-containing waste liquid. Background technique [0002] Many domestic enterprises in petrochemical, chemical, steel, coal gasification and other industries will produce a large amount of salt substances rich in sulfur, ammonium thiocyanate and ammonium thiosulfate while producing their main target products. Such waste liquid contains a variety of chemical components, but because the main components are salt substances, which are highly corrosive, direct discharge of such waste liquid in large quantities for a long time will seriously pollute the environment and endanger human health. . Contents of the invention [0003] In order to overcome the above deficiencies, the present invention provides a method for producing sulfuric acid from sulfur-containing waste liquid. The sulfur-containing ...
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IPC IPC(8): C01B17/76
CPCC01B17/76Y02P20/10Y02P20/129
Inventor 居荣明俞向东杭德森朱亚阮志刚
Owner NANJING HAILU CHEM TECH