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Device and method for carrying out low-concentration SO2 smoke desulfurization through alkaline waste liquid

A SO2, low-concentration technology, applied in mineral processing, smelting and chemical industry, can solve the problems of easy generation of new waste, difficult recycling and treatment, high production cost, etc., to reduce raw material cost, significant desulfurization effect, small footprint Effect

Active Publication Date: 2016-01-27
JINCHUAN GROUP LIMITED
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

high concentration SO 2 Flue gas is generally recovered by producing sulfuric acid, but the environmentally friendly gas collection produced by metallurgical furnaces is due to the dispersion, large amount of flue gas, and SO 2 Low concentration, high volatility and other factors make recovery and treatment difficult
Conventional treatment methods include lime method, activated coke method, new carbon catalysis method, ionic liquid circulation method, sodium alkali method, citrate absorption method, ammonia method, etc., but there are common problems such as high production cost and easy generation of new waste.

Method used

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  • Device and method for carrying out low-concentration SO2 smoke desulfurization through alkaline waste liquid

Examples

Experimental program
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Effect test

Embodiment 1

[0026] Such as figure 1 As shown, a low-concentration SO 2 Flue gas desulfurization installations, including SO 2 Flue gas absorption tower 2, electric demister 3, active pulp buffer tank 4, active pulp absorbing liquid buffer tank 7, waste electrolyte buffer tank 9, waste electrolyte circulation tank 10 and exhaust chimney 12, SO 2 The flue gas absorption tower 2 is a double-circulation turbulent desulfurization tower, including the reverse nozzle 13 and the absorption tower body. The reverse nozzle 13 is composed of a transition section, a reverse injection section and a straight pipe section, and plays a role in connecting the flue and the absorption tower body. Function, the absorption tower body includes tower body, tower bottom circulation tank, reverse nozzle nozzle 14, active slurry nozzle 15 in the middle and lower part of the tower, gas distribution device, waste electrolyte nozzle 16 in the upper part of the tower, SO 2 The end of the reverse nozzle 13 of the flue...

Embodiment 2

[0029] In this embodiment, the use of alkaline waste liquid to carry out low-concentration SO 2 The flue gas desulfurization device is the same as in Example 1, and it is applied to a smelting flue gas fluctuating greatly, SO 2 A certain low concentration of SO in the case of exceeding the treatment concentration 2 flue gas (SO 2 Concentration: 4500mg / Nm 3 -9000mg / Nm 3 , average concentration: 6570mg / Nm 3 ;Flue gas volume: 82850Nm 3 / h-171190Nm 3 / h, average gas volume: 127020Nm 3 In the desulfurization of / h), it specifically includes the following steps: transport the active slurry produced by ore dressing to the active slurry buffer tank 4, and transport it to the SO through the active slurry delivery pump 5 2 Bottom circulation tank of flue gas absorption tower 2, SO 2 The active slurry in the tower bottom circulation tank of the flue gas absorption tower 2 is transported to the reverse nozzle nozzle 14 and the active slurry nozzle 15 in the middle and lower part o...

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Abstract

The invention discloses a device and method for carrying out low-concentration SO2 smoke desulfurization through alkaline waste liquid. The device mainly comprises a SO2 smoke absorption tower, an electric mist precipitator, an active ore pulp buffer tank, an active ore pulp absorption-liquid buffer tank, a waste electrolyte buffer tank, a waste electrolyte circulating trough and a tail smoke discharging chimney. Acid gas SO2 in the smelting smoke is absorbed two times through alkaline ingredients in active ore pulp, and then the acid gas SO2 in the smelting smoke is further absorbed through alkaline ingredients in waste electrolytes; meanwhile, ore dust in the smelting smoke is removed, the two kinds of waste alkali liquid including the active ore pulp and the waste electrolytes are greatly used, the technological process is simple, running is reliable, the desulfurization effect is remarkable, investment is low, the floor area is small, operation is easy, desulfurization of the huge amount of low-concentration SO2 smoke can be completed only through low cost, the raw material cost of the desulfurization process is reduced, new waste can not be generated, and the aims that through treatment, environment-friendly collected SO2 meets the standard and economy reaches the standard are achieved in the mode that waste is controlled through waste.

Description

technical field [0001] The invention belongs to the technical field of ore dressing, smelting and chemical industry, and specifically relates to a method of using alkaline waste liquid to process low-concentration SO 2 Device and method for flue gas desulfurization. Background technique [0002] Nickel-copper pyrometallurgical smelters will produce a large amount of SO during the smelting process 2 Smelting fumes. high concentration SO 2 Flue gas is generally recovered by producing sulfuric acid, but the environmentally friendly gas collection produced by metallurgical furnaces is due to the dispersion, large amount of flue gas, and SO 2 Low concentration, high volatility and other factors make recovery and treatment difficult. Conventional treatment methods include lime method, activated coke method, new carbon catalysis method, ionic liquid circulation method, sodium alkali method, citrate absorption method, ammonia method, etc., but there are common problems such as h...

Claims

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Application Information

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IPC IPC(8): B01D53/80B01D53/78B01D53/50B01D50/00
Inventor 孙治忠路八智史万敬方永水马俊王晖张宏昌毛艳丽李平德马莹张雪峰
Owner JINCHUAN GROUP LIMITED