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Method and device for blast furnace coal gas fine desulfurization and purification

A blast furnace gas and gas refining technology, which is applied in the preparation/purification of sulfur, removal of gas pollutants, catalytic conversion of impurities, gas purification, etc., can solve the problems of difficult desulfurization, unrecovered sulfur elements, poor adsorption and desulfurization effects, etc. problems, achieve the effect of reducing desulfurization investment cost and operating cost, improving adsorption desulfurization efficiency, and improving desulfurization effect

Inactive Publication Date: 2020-02-21
CHINA CITY ENVIRONMENT PROTECTION ENGINEERING LIMITED COMPANY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method has the following disadvantages: the temperature of blast furnace gas after TRT power generation is 120-160°C, and the effect of direct adsorption desulfurization without cooling is poor; there are many kinds of sulfide in blast furnace gas, and it is difficult to remove sulfide with a single adsorbent, and Unrecovered elemental sulfur
Although this method can recover sulfur, the biggest disadvantages of this method are: large amount of blast furnace gas and low total sulfur content, it is difficult to directly carry out wet oxidation desulfurization after hydrolysis, and the efficiency is low, and the corresponding equipment is relatively large. Large and expensive to run

Method used

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  • Method and device for blast furnace coal gas fine desulfurization and purification
  • Method and device for blast furnace coal gas fine desulfurization and purification

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Effect test

Embodiment 1

[0048] The total sulfur concentration in the blast furnace gas I is between 250mg / m3, enters the conversion unit, converts the organic sulfur in the stream I into hydrogen sulfide to form the stream II, and the conversion unit contains a potassium-modified alumina catalyst; the stream II enters the cooling Unit to form stream III; stream III enters the adsorption unit composed of at least two adsorption towers connected in parallel to remove hydrogen sulfide from blast furnace gas to form clean gas stream IV. The total sulfur content of stream IV is 20mg / Nm3, and the adsorption tower contains copper modified Molecular sieve adsorption material; at least two adsorption towers in the adsorption unit are used in parallel, and the towers are switched automatically to ensure that at least one tower absorbs sulfide, and the other adsorption tower with saturated adsorption is decomposed and regenerated under the action of high-temperature clean gas, high-temperature clean gas The sulf...

Embodiment 2

[0050] The total sulfur concentration in the blast furnace gas I is between 200mg / m3, enters the conversion unit, converts the organic sulfur in the stream I into hydrogen sulfide to form the stream II, and the conversion unit contains a sodium-modified alumina catalyst; the stream II enters the cooling Unit to form stream III; stream III enters the adsorption unit composed of at least two adsorption towers connected in parallel to remove hydrogen sulfide from blast furnace gas to form clean gas stream IV. The total sulfur content of stream IV is 15mg / Nm3, and the adsorption tower contains copper modified Molecular sieve adsorption material; at least two adsorption towers in the adsorption unit are used in parallel, and the towers are switched automatically to ensure that at least one tower absorbs sulfide, and the other adsorption tower with saturated adsorption is decomposed and regenerated under the action of high-temperature clean gas, high-temperature clean gas The sulfur-...

Embodiment 3

[0052] The total sulfur concentration in blast furnace gas I is 150mg / m 3 In between, it enters the conversion unit to convert the organic sulfur in stream I into hydrogen sulfide to form stream II, which contains a calcium-modified alumina catalyst; stream II enters the cooling unit to 60°C to form stream III; stream III Enter the adsorption unit composed of at least two adsorption towers connected in parallel to remove hydrogen sulfide in the blast furnace gas to form a clean gas stream IV. The total sulfur content of the stream IV is 20.5mg / Nm3. The adsorption tower contains cobalt modified molecular sieve adsorption materials; the adsorption unit At least two adsorption towers are used in parallel, and the towers are switched automatically to ensure that at least one tower absorbs sulfide, and the other adsorption tower with saturated adsorption is analyzed and regenerated under the action of high-temperature clean gas, and the high-temperature clean gas forms sulfur-rich c...

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Abstract

The invention provides a blast furnace coal gas fine desulfurization and purification method, which comprises that S1, blast furnace coal gas enters a conversion unit under a positive pressure, and the organic sulfur in the blast furnace coal gas is converted into hydrogen sulfide; S2, the obtained material enters a cooling unit and is cooled; and S3, the cooled stream enters an adsorption unit filled with an adsorption material, and the sulfide in the blast furnace coal gas is adsorbed and removed to form purified coal gas. According to the invention, the low-concentration sulfides in blast furnace coal gas are enriched into sulfur-rich concentrated gas to convert the working condition with large-capacity and low-concentration sulfides into the working condition with small-capacity and high-concentration sulfides, so that the desulfurization effect can be improved, the desulfurization investment cost and the operation cost can be reduced, the sulfur element in the blast furnace coal gas can be recovered, the atom economy is high, and the secondary pollution is reduced.

Description

technical field [0001] The invention relates to the technical field of blast furnace gas purification, in particular to a method and device for fine desulfurization and purification of blast furnace gas. Background technique [0002] Blast furnace gas is one of the main by-products of the iron and steel industry. In addition to the use of the blast furnace hot blast stove itself, there is a large surplus. At present, it is mostly used in the way of co-firing a part of coal-fired power boilers or for small-scale mixed gas boilers, but the amount of recovery is small. Therefore, how to make full use of surplus blast furnace gas, avoid energy waste and environmental pollution caused by venting, and promote the benign interaction of resources, energy, environment and society will be a new obstacle in the process of energy conservation and emission reduction. The traditional terminal treatment technology is becoming less and less suitable for the environmental protection require...

Claims

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Application Information

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IPC IPC(8): C10K1/34C10K1/32C01B17/05
CPCC01B17/05C10K1/004C10K1/32C10K1/34
Inventor 胡鑫施飞罗海兵肖汉平刘升潘响明刘昌持夏龙邵雁代伟有方定桥霍锐鹏
Owner CHINA CITY ENVIRONMENT PROTECTION ENGINEERING LIMITED COMPANY
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