Flue gas desulfurization tower and flue gas dust removal and desulfurization and wastewater treatment process

A technology for desulfurization towers and flue gas, which is applied in the fields of flue gas desulfurization towers, flue gas dedusting, desulfurization and wastewater treatment, and can solve the problems of catalytic devices and coal-fired boilers that cannot be upgraded, shut down or demolished and rebuilt, and have too many equipments

Active Publication Date: 2019-12-13
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above-mentioned wet desulfurization technology includes flue gas desulfurization, desulfurization wastewater oxidation treatment or regeneration unit. The process is long, there are many equipments, and the floor area is large, which seriously restricts the construction and upgrading of dust removal and desulfurization devices. Some catalytic devices and coal-fired Boilers cannot be upgraded due to lack of sufficient space, resulting in smoke emission indicators that cannot meet the current national standards and have to be shut down or demolished and rebuilt

Method used

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  • Flue gas desulfurization tower and flue gas dust removal and desulfurization and wastewater treatment process
  • Flue gas desulfurization tower and flue gas dust removal and desulfurization and wastewater treatment process
  • Flue gas desulfurization tower and flue gas dust removal and desulfurization and wastewater treatment process

Examples

Experimental program
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Effect test

Embodiment 1

[0071] A flue gas desulfurization tower, from top to bottom is a flue gas discharge area 1, a demister area 3, a tower area 4, a spray area 6, a rapid cooling area 27, and a waste water treatment area 7, and the flue gas discharge area 1 and The defogging zone 3 is connected by a cone-shaped variable diameter 2, the tower plate zone 4 is below the defogging zone 3, the tower plate zone 4 and the spray zone 6 are connected by an inverted cone-shaped variable diameter 5, and the quenching cooling zone is below the spray zone 6 27. Below the rapid cooling zone 27 is the wastewater treatment zone 7.

[0072]The demister 11 described in CN201621043983.8 is set in the demister area 3, the liquid distributor 12 is arranged under the demist area 3, the tray area 4 is arranged under the liquid distributor 12, and a total of 4 layers of towers are arranged in the tray area 4 Plate, select sieve tray; Spray area 6 is provided with 3 layers of spray pipelines 14 in total, the distance bet...

Embodiment 2

[0081] The flue gas volume of an enterprise is 220000Nm 3 / h, the flue gas temperature is 145°C, the pressure is 4.5kPa, where SO 2 The concentration is 1200mg / Nm 3 , Dust concentration is 260mg / Nm 3 , using the flue gas desulfurization tower of the present invention, the clean water flow rate in the quenching cooling zone is 80 m 3 / h. SO in exhaust flue gas 2 The content is measured by German Testo flue gas analyzer (model Testo-350). The dust content is measured according to GB / T 16157-1996 "Sampling Method for Particulate Matter and Gaseous Pollutants in Exhaust from Stationary Pollution Sources". The gas is filtered, dissolved in water, and the salt content is measured and calculated according to HJ / T51-1999 "Gravimetric Method for Determination of Total Salt in Water Quality". After measurement and calculation, the temperature of the flue gas entering the chimney is 50 °C, SO 2 The concentration is 11.6mg / Nm 3 , Dust content is 9.3mg / Nm 3 , soluble salt content is...

Embodiment 3

[0083] Close the valve that enters the 27 clean water pipelines in the rapid cooling and cooling zone, and adjust the clean water flow to 0m 3 / h, all the other are the same as embodiment 2, the flue gas temperature that enters the chimney is 51 ℃, SO 2 The content is 14.8mg / Nm 3 , Dust content is 21.3mg / Nm 3 , soluble salt content is 9.4mg / Nm 3 .

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Abstract

The invention discloses a flue gas desulfurization tower and a flue gas dust removal and desulfurization and wastewater treatment process. The flue gas desulfurization tower comprises a flue gas discharge area, a demisting area, a tray area, a spraying area, a rapid cooling area and a wastewater treatment area in sequence from top to bottom, wherein the wastewater treatment area is divided into anoxidation and flocculation area and a circulating clear liquid area by a vertical partition I, and the circulating clear liquid area is completely separated from the oxidation and flocculation area and the spraying area by the top of the circulating clear liquid area by virtue of a partition II; filter media are arranged on the vertical partition I; and a flue gas pipeline II extends into the oxidation and flocculation area, and a plurality of flue gas branch pipes are horizontally distributed on the flue gas pipeline II in the oxidation and flocculation area in sequence from bottom to top. According to the flue gas desulfurization tower, flue gas dust removal and desulfurization and desalting and wastewater treatment are performed in one tower, so that an occupied area is greatly reduced, and the construction and rebuilding cost of the device and the device operating cost are reduced.

Description

technical field [0001] The invention belongs to the field of industrial waste gas purification, and relates to a flue gas desulfurization tower and flue gas dust removal, desulfurization and waste water treatment processes. Background technique [0002] Sulfur dioxide and dust are contained in the flue gas of coal-fired boilers and the regenerated flue gas of catalytic cracking catalysts. Sulfur dioxide and dust are the main components of air pollutants. Sulfur dioxide is the main cause of acid rain, and dust with smaller particle sizes is the smog One of the culprits. [0003] Environmental pollution is becoming more and more serious, smog incidents occur frequently, and the country pays more and more attention to environmental protection. In recent years, a series of environmental protection laws and regulations, national standards, and management methods have been issued. GB 13223-2011 "Emission Standard of Air Pollutants for Thermal Power Plants" stipulates: coal-fired ...

Claims

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Application Information

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IPC IPC(8): B01D53/50B01D53/73B01D53/78B01D53/80B01D47/06B01D53/18B01D53/96C02F9/10C02F103/18
CPCB01D47/06B01D53/1418B01D53/1425B01D53/1481B01D53/1493B01D53/18B01D53/502B01D53/507B01D53/73B01D53/78B01D53/80B01D53/96B01D2247/04B01D2247/10B01D2251/2062B01D2251/304B01D2251/402B01D2251/404B01D2251/604B01D2251/606B01D2251/608B01D2251/80B01D2252/1035B01D2258/0283C02F1/001C02F1/048C02F1/16C02F1/5236C02F1/56C02F1/727C02F1/74C02F1/78C02F9/00C02F2103/18
Inventor 林崧李磊刘忠生李欣金平韩天竹
Owner CHINA PETROLEUM & CHEM CORP
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