Device for producing ammonium sulfate by using waste sulphur generated during gas desulfuration

A technology of coal gas and ammonium sulfate, applied in the field of coking and chemical industry, can solve the problem of unusable waste sulfur and achieve the effect of improving color and improving efficiency

Active Publication Date: 2015-02-04
JINAN METALLURGICAL CHEM EQUIP CO LTD
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  • Abstract
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Problems solved by technology

[0007] Aiming at the fact that the waste sulfur obtained by gas desulfurization cannot be utilized, and the production of ammonium sulfate by the saturator requires sulfur supplementation, the present invention proposes a device that uses gas desulfurization to produce waste sulfur containing tar and secondary salts and a saturator to co-produce ammonium sulfate

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  • Device for producing ammonium sulfate by using waste sulphur generated during gas desulfuration

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Embodiment 1

[0020] Such as figure 1 As shown, the sulfur content is 15.5%, the water content is 80.9%, and other impurities are 3.6% (including coke powder, coal powder, tar, ammonium thiocyanate, ammonium thiosulfate, ammonium sulfate, and catalyst residues), using a continuous molten sulfur purifier After purification, the sulfur was obtained with a purity of 99.6%.

[0021] After the sulfur containing 99.5% sulfur is subjected to secondary oxidation (including the primary absorption tower), the composition (volume %) of the obtained gas is SO 2 : 0.059%, SO 3 : 0.308%, O 2 : 12.023%, N 2 : 87.61%.

[0022] Composition of the above into SO 2 : 0.059%, SO 3 : 0.308%, O 2 : 12.023%, N 2 : 87.61% of the gas is absorbed by the circulating mother liquor of ammonium sulfate (the specific gravity of the mother liquor is 1.26g / cm 3 , the crystallization ratio is less than 10%, the acidity of the mother liquor is 3.5-4.5%, and the liquid-gas ratio (V / V) is 1:10; and then absorbed by con...

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Abstract

The invention discloses a device for producing ammonium sulfate by using waste sulphur generated during gas desulfuration. The device comprises a continuous sulphur melting purifier and a sulphide concentrate clarifying tank which are connected, wherein the sulphide concentrate clarifying tank is connected with a primary oxygenizer through a refined sulphur pump, the primary oxygenizer is connected with a secondary oxygenizer, the secondary oxygenizer is connected with a cold-hot exchanger, the cold-hot exchanger is connected with the top of a first absorption column, the first absorption column is connected with an absorption heat exchanger and also connected with a water tank, the water tank supplies water to the absorption heat exchanger and the first absorption column through a water circulating pump, the primary oxygenizer, the secondary oxygenizer and the heat exchanger are connected with an air outlet of a drying tower, the drying tower is connected with a draught fan, the heat exchanger is connected with a mother solution absorption column, the mother solution absorption column is connected with a mother solution saturator, the top of the mother solution absorption column is connected to the bottom of a tail gas tower, the bottom of the mother solution absorption column is connected with an ammonium sulfate system, and tail gas is discharged by a tail gas chimney. The device provided by the invention can solve the pollution caused by unmarketable waste sulphur and stock piling of waste sulphur, and can change wastes into products, so that wastes can be changed into valuables.

Description

technical field [0001] The invention relates to the technical field of coking and chemical industry, in particular to a device for producing ammonium sulfate by using waste sulfur produced by gas desulfurization, which is widely used in the field of gas desulfurization in coking plants and gas plants. Background technique [0002] HPF is a common gas desulfurization method for coking units. The method uses ammonia as an alkali source and HPF as a catalyst (quinone, cobalt, and iron complex) to convert sulfur-containing impurities such as hydrogen sulfide in the gas into elemental sulfur through a liquid-phase catalytic oxidation reaction. The elemental sulfur in the desulfurization liquid is recovered by froth flotation, and the recovered elemental sulfur also contains a large amount of water and impurities such as coke powder, coal powder, tar, thiocyanate, thiosulfate, and desulfurization catalyst residues. The traditional process usually adopts pressure filtration method...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01C1/24
CPCY02P20/129
Inventor 温燕明王登富汤志刚康春清廖俊才陈善龙孙兆俊王杰李兆福
Owner JINAN METALLURGICAL CHEM EQUIP CO LTD
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