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Flue gas desulfurization system and method

A desulfurization system and flue gas technology, applied in chemical instruments and methods, separation methods, dispersed particle separation, etc., can solve the problems of desulfurization agent calcium-alkali waste, unstable calcium sulfite, secondary pollution and other problems

Inactive Publication Date: 2012-09-26
SHANGHAI HANZHUO ENERGY TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

After this part of the dehydration is collected, the product components are complex and difficult to use. Moreover, the calcium sulfite generated in it is unstable, easy to oxidize and decompose, causing secondary pollution, and the unreacted calcium alkali is removed together, which will cause desulfurization agent calcium alkali. waste

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  • Flue gas desulfurization system and method
  • Flue gas desulfurization system and method
  • Flue gas desulfurization system and method

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Embodiment Construction

[0016] Such as figure 1 As shown, the desulfurization system of the present invention includes a main desulfurization tower 1 , a front desulfurization tower 5 , a regeneration tank 300 , and a dehydration device 4 .

[0017] Among them, the middle part of the main desulfurization tower 1 has a smoke inlet 101, and the top has a smoke outlet 102. In the main desulfurization tower 1, there are respectively a demister 103 and a main spray device 2 under the smoke outlet 102. In the main desulfurization tower 1 The bottom has a slurry pool 105 .

[0018] The front desulfurization tower 5 has a front desulfurization smoke inlet 201 in the middle, and a front desulfurization smoke outlet 202 on the top. The front desulfurization tower 5 is located below the front desulfurization smoke outlet 202. Device 203 and pre-spray device 7. There is a reaction pool 205 at the bottom of the front desulfurization tower 5 . The reaction tank 205 has an oxidation air inlet 42 , a slurry outle...

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Abstract

The invention discloses a flue gas desulfurization system and method. The system is characterized in that a prepositive desulfurization tower is arranged in front of a main desulfurization tower; a prepositive desulfurization smoke inlet is formed in the middle of the prepositive desulfurization tower; a prepositive desulfurization smoke outlet and a prepositive spray device positioned below the prepositive desulfurization smoke outlet are arranged on the top of the prepositive desulfurization tower; a reaction tank is arranged at the bottom of the prepositive desulfurization tower and is provided with an oxidized air inlet, a slurry outlet, a feeding hole and a gypsum discharging hole; a regeneration pool is connected with the feeding hole at the bottom of the prepositive desulfurization tower by virtue of a delivery pump and a dehydration device; the slurry outlet is connected with the prepositive spray device by virtue of a third circulating pump; and the prepositive desulfurization smoke outlet is connected with the smoke inlet of the main desulfurization tower. The desulfurization system and method have the advantages that desulfurization products generated by a double-alkali method are fully utilized, pollution is avoided, and desulfurization efficiency is improved.

Description

technical field [0001] The invention relates to a flue gas desulfurization system and method, belonging to the technical field of waste gas treatment in power plants, chemical plants, smelting plants and the like. Background technique [0002] Double-alkali desulfurization refers to the use of sodium alkali (NaOH, Na 2 C0 3 etc.) and calcium bases (CaO, Ca(OH) 2 ) A desulfurization method in which two kinds of alkaline substances are used as desulfurizers. The main process is: adding sodium alkali into the clear water tank at one time to make sodium alkali desulfurization liquid (circulating water), and pumping it into the desulfurization tower for desulfurization. During the desulfurization process, the fly ash in the flue gas is wetted by the circulating water and trapped into the circulating water. The circulating water discharged from the desulfurization tower becomes gray water (thin mortar) and flows into the sedimentation tank (if necessary). The supernatant overf...

Claims

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Application Information

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IPC IPC(8): B01D53/80B01D53/50
Inventor 刘上光刘细拾
Owner SHANGHAI HANZHUO ENERGY TECH
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