Method and system for removing hydrogen sulfide from coal gas through single tower
A hydrogen sulfide and gas technology, which is applied in chemical instruments and methods, separation methods, and sulfur preparation/purification, etc., can solve the problems of complex equipment structure, large gas resistance, and large floor space, and achieves good desulfurization effect and reduced energy consumption. Small gas resistance, thorough desulfurization effect
Active Publication Date: 2014-12-17
四川皇龙智能破碎技术股份有限公司
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Problems solved by technology
In the prior art, the process of removing hydrogen sulfide is mostly a combination of a swirl tower, a packed tower and a gas-liquid separation tower for desulfurization, that is, the three-tower desulfurization method. The equipment structure required for this process is relatively complicated and occupies an area of Large, the gas resistance is also quite large, the packing is easy to block and it is very difficult to clean and replace
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[0018] In order to understand the purpose, technical solutions and beneficial effects of the present invention more clearly, the present invention will be further described below in conjunction with the accompanying drawings, but the protection scope of the present invention is not limited to the following examples.
[0019] A method for removing hydrogen sulfide in coal gas with a single tower, comprising the steps of:
[0020] The first spray desulfurization: the gas enters the bottom of the desulfurization tower to conduct heat and mass transfer with the desulfurization bottom liquid, and then the desulfurization bottom liquid enters the bottom liquid tank for heat exchange and is recycled to spray and desulfurize the gas again, and so on;
[0021] The second spray desulfurization: the coal gas after the first spray desulfurization moves upward in the desulfurization tower, and conducts heat and mass transfer with the desulfurization liquid again, and then the desulfurizatio...
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The invention discloses a method for removing hydrogen sulfide from coal gas through a single tower. The method comprises the following steps: spraying and desulfurizing for the first time; spraying and desulfurizing for the second time; and discharging the coal gas and preparing a sulfur paste. The invention also discloses a device adopting the method. The device comprises a cylinder (1), a desulfurizing tower, a base solution tank (3), a regenerating tank (5) and a sulfur paste preparing system (6), wherein the desulfurizing tower has a double-layer spraying structure; a heat exchanger I (2) is arranged in the base solution tank (3); the regenerating tank (5) is provided with a heat exchanger II (4); and the sulfur paste preparing system (6) is connected with the regenerating tank (5). According to the method and system, the desulfurizing cost is greatly saved; an ideal desulfurizing state can be achieved by only using one set of the system; the occupied area is big; the structure is simpler; the rising resistance of the coal gas during a treating process is smaller, so that the desulfurizing efficiency is increased; the padding plugging is avoided; and the cleaning and the exchanging are both conveniently performed.
Description
technical field [0001] The invention relates to a method and system for removing hydrogen sulfide in coal gas. Background technique [0002] According to the requirements of "Environmental Protection Law of the People's Republic of China", "Law of the People's Republic of China on Prevention and Control of Air Pollution" and other laws and regulations, various sulfur-containing coals are made into gas for combustion, and the sulfur in the gas needs to be removed. Sulfur in gas can be divided into two types: sulfur dioxide released after combustion and hydrogen sulfide released before combustion. Because the amount of flue gas increases after combustion, it is very complicated to deal with, so it is usually necessary to remove it before combustion in production. hydrogen sulfide. In the prior art, the process for removing hydrogen sulfide is mostly a combination of a swirl tower, a packed tower and a gas-liquid separation tower for desulfurization, that is, the three-tower d...
Claims
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IPC IPC(8): B01D53/78B01D53/52B01D53/96C10K1/08C01B17/05
CPCY02P20/584
Inventor 唐晓坤
Owner 四川皇龙智能破碎技术股份有限公司