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A purification process and flue gas technology, applied in gas treatment, chemical instruments and methods, dispersed particle filtration, etc., to achieve the effects of low maintenance cost, high out-of-stock rate, and simple and convenient process operation.
Inactive Publication Date: 2017-11-17
BATOU LIGHT IND VOCATIONAL TECHN COLLEGE
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Problems solved by technology
In view of the above problems, the existing desulfurization methods can no longer meet the special limit value of SO 2 The emission concentration is not higher than 30mg / Nm 3 The ultra-low emission standards for ultra-low emission standards require the development of a new desulfurization method suitable for ultra-low emissions of flue gas SO2 concentration
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Embodiment 1
[0027] This embodiment provides a flue gas purification process, the steps include:
[0028] 1) Desulfurization
[0029] 1.1 The flue gas enters from the air inlet at the bottom of the first-level desulfurization tower, and a plurality of water pipes are vertically arranged in the first-level desulfurization tower, and a plurality of water nozzles are evenly arranged on the water pipes, and the top of the first-level desulfurization tower is arranged with sprinkler installations;
[0030] 1.2 While the flue gas enters the first-stage desulfurization tower, the spraying device and nozzles on the top of the first-stage desulfurization tower spray a sodium bicarbonate solution, and the sodium bicarbonate solution contacts the flue gas entering from the bottom, and the hydrogen carbonate The mass concentration of sodium solution is 50g / l;
[0031] 1.3 The flue gas is discharged from the gas outlet at the top of the first-stage desulfurization tower, and enters through the air in...
Embodiment 2
[0045] This embodiment provides a flue gas purification process, the steps include:
[0046] 1) Desulfurization
[0047] 1.1 The flue gas enters from the air inlet at the bottom of the first-level desulfurization tower, and a plurality of water pipes are vertically arranged in the first-level desulfurization tower, and a plurality of water nozzles are evenly arranged on the water pipes, and the top of the first-level desulfurization tower is arranged with sprinkler installations;
[0048] 1.2 While the flue gas enters the first-stage desulfurization tower, the spraying device and nozzles on the top of the first-stage desulfurization tower spray a sodium bicarbonate solution, and the sodium bicarbonate solution contacts the flue gas entering from the bottom, and the hydrogen carbonate The mass concentration of sodium solution is 100g / l;
[0049] 1.3 The flue gas is discharged from the gas outlet at the top of the first-stage desulfurization tower, and enters through the air i...
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Abstract
The invention discloses a purification technology of flue gas. The purification technology comprises the steps that the flue gas enters from a gas inlet in the bottom of a primary desulfurizing tower, wherein multiple water pipes are vertically arranged in the primary desulfurizing tower, multiple spray nozzles are evenly arranged on the water pipes, and a spray device is arranged on the top of the primary desulfurizing tower; the flue gas enters the primary desulfurizing tower, meanwhile the spray device on the top of the primary desulfurizing tower and the spray nozzles all spray out a sodium bicarbonate solution; the flue gas is exhausted from a gas outlet in the top of the primary desulfurizing tower and enters a gas inlet in the top of a secondary desulfurizing tower; a desulfurizing agent is humidified by a humidifier arranged on the top of the secondary desulfurizing tower and enters the secondary desulfurizing tower; refrigeration is conducted; a denitration agent is prepared; multiple denitration spray guns are arranged on the side wall of a denitration tower, the denitration spray guns are connected with a denitration agent container, the denitration agent is mixed with the flue gas, and the spray time is controlled through the sectional area of a flue and the flow velocity so that the denitration reaction can be sufficient; dust removal is conducted. The purification technology is simple, easy and convenient to operate, high in denitration efficiency and low in maintenance cost.
Description
technical field [0001] The invention relates to a flue gas purification process. Background technique [0002] With the development of society and the progress of science and technology, the problem of environmental pollution has been highly valued by all walks of life, and the problem of air pollution is particularly prominent, especially the dust and SO in the flue gas. 2 The flue gas is very serious to the air pollution, which is also the key monitoring object of the relevant state departments in recent years. For this reason, relevant national departments continue to improve environmental protection legislation, and environmental protection standards are becoming increasingly stringent. In particular, since 2016, the newly revised version of the "Air Pollution Prevention and Control Law" has been implemented, which has put forward strict requirements on the emission standards of many flue gases, and special limits Region SO 2 The emission concentration requirement is n...
Claims
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Application Information
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