Efficient regeneration desulphurization tower

Abstract

An efficient regeneration desulphurization tower comprises a desulphurization tower 1, a coal gas inlet 2, a coal gas outlet 3, a pregnant solution outlet 4, a lean solution inlet, a regenerator 6, a lean solution outlet 7, a pregnant solution inlet 8, a solution recirculating pump 10, a sulfur foam outlet 11, a lean solution groove 13, a high-pressure air inlet 14 and a gas-liquid distributor 16, wherein the lean solution groove is formed in the tower bottom at the lower end of the desulphurization tower, and the lean solution outlet and the sulfur foam outlet are formed in the lower section; stuffing is mounted in the desulfuration section in the tower; the set of regenerator is mounted at the upper part of the lean solution groove; a solution circulating line is mounted outside the tower body; with the aid of one solution recirculating pump, the solution circulating inside and outside the tower body via the lean solution inlet, the pregnant solution outlet, the pregnant solution inlet and the lean solution outlet is realized. The desulphurization tower has an optimized structure, utilizes the large diameter of the desulphurization tower, shortens the move distance of the solution, and reduces the loss of system heat and various materials, also the resistance force to 0.02-0.03 MPa. Moreover, the energy consumption is reduced by 20-30 percent, and an efficient regenerator is adopted for oxidation regeneration of the pregnant solution and has the advantages of small size, strong regeneration capacity and stability in operation.

Description

technical field [0001] The invention relates to a method for removing H contained in coke oven gas 2 S, HCN and other substances equipment and technology, specifically relate to a desulfurization tower and desulfurization technology of the desulfurization tower. Background technique [0002] The structure of the traditional desulfurization tower and its desulfurization process are relatively complicated. Generally speaking, the desulfurization tower includes the main body of the desulfurization tower, regeneration tower, lean liquid tank and rich liquid tank. The desulfurization process is to pass the crude gas from the cold drum electric capture section through the gas The inlet enters the lower part of the main body of the desulfurization tower and countercurrently contacts with the desulfurization liquid sprayed from the top of the tower to wash and absorb the hydrogen sulfide in the gas. The outflowing desulfurization liquid (also called rich liquid at this time) enter...

AI Technical Summary

Problems solved by technology

[0004] First, the structure is complex, and the whole desulfurization system has a large number of large-scale equipment, such as the main body diameter of the desulfurization tower is more than φ5000mm, the diameter of the regeneration tower is more than 4000mm, the height is more than 40m, and there are some large-diameter tanks, etc.

The construction area is large, and the pipeline layout is wide and long, which increases the investment cost of equipment

[0005] Second, the process is complicated. The rich liquid oxidation regeneration adopts a high-tower regeneration process, and the regeneration tower, rich liquid tank and lean liquid tank must be built separately; while the internal parts of the regeneration tower are made of carbon steel sieve plate trays, which have low corrosion resistance and low corrosion resistance. Easy to block, short use time, frequent equipment shutdown and maintenance, which makes the normal operation of the system and daily maintenance more difficult

[0006] The third is that due to the large size of equipment, various types of models, and long installation distances of pipelines, various losses in production increase, such as heat loss and catalyst loss, resulting in a decrease in desulfurization efficiency, increased operating costs, and reduced energy efficiency.

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