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Method and apparatus for recovering sulfer dioxide from smoke and producing thiamine fertilizer

A technology of sulfur dioxide and ammonium sulfate, applied in fertilization equipment, chemical instruments and methods, ammonium salt fertilizer, etc., can solve the problems of waste residue, poor development of ammonia method, and consumption of natural resources, so as to avoid secondary pollution Effect

Inactive Publication Date: 2006-10-25
上海申川环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The discarding method has obvious disadvantages: consumption of new natural resources; waste gas turning into waste residue, bringing new pollution; and emission of CO at the same time 2 , for the greenhouse gas
This will not only cause waste loss of ammonia, but also cause new pollution
[0034] The above-mentioned difficulties have led to an important reason why the ammonia process has not developed well in the past for a long time

Method used

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  • Method and apparatus for recovering sulfer dioxide from smoke and producing thiamine fertilizer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0083] use figure 1 process and desulfurization crystallization tower.

[0084] A 260T / h thermoelectric boiler, burning coal with a sulfur content between 0.6-1.0%, and a flue gas flow rate of 340,000 Nm 3 / hr, SO 2 The content is 2000mg / Nm 3 , the dust content of flue gas is 80mg / Nm 3 , the flue gas temperature is 140°C.

[0085] The desulfurization crystallization tower 1 is cylindrical, and its structural parameters are as follows:

[0086] The desulfurization crystallization tower has a diameter of 7m and a height of 25m.

[0087] Plate corrugated packing is arranged in the defoaming area 3, and the packing height is 0.6m;

[0088] The process water distributor 5 is a nozzle distributor;

[0089] Ammonia recovery circulating fluid distributor 7 is a nozzle;

[0090] Ammonia recovery zone 8 is equipped with grid packing with a specific surface area of ​​90m 2 / m 3 , the packing height is 2m;

[0091] The sulfur dioxide absorbing liquid distributor 10 is a nozzle ...

Embodiment 2

[0105] Adopt the same method of embodiment 1, wherein:

[0106] 300,000 kW thermal power generation unit, burning coal with a sulfur content of 2.5%, and a flue gas flow rate of 1.1 million Nm 3 / hr, SO 2 The content is 6285mg / Nm 3 , the dust content of flue gas is 100mg / Nm 3 , the flue gas temperature is 145°C.

[0107] In this usage example, the desulfurization crystallization tower has a diameter of 12m and a height of 28m, the sulfur dioxide absorbing liquid distributor 10 is a nozzle with an aperture of 32mm, and there is no packing in the sulfur dioxide absorbing zone 12;

[0108] The temperature of the flue gas is 140°C, and it is directly sent from the outlet of the induced draft fan of the boiler to the inlet flue of the desulfurization crystallization tower. The inlet flue is equipped with a chilled spray pipe to pre-cool the flue gas to 90°C. After leaving the desulfurization crystallization tower, the SO in the tail gas 2 The content is 13mg / Nm 3 , NH 3 The ...

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Abstract

This invention discloses sulfur dioxide recovery from flue gas and generating sulfur ammonium fertilizer method and equipment. The equipment includes desulfurization prilling tower, the tower includes tower body, despumation region, ammonia recovery region, sulfur dioxide absorbing region, fuel gas disperse chill zone and oxidizing crystalline region. Desulfurization material is ammonia and water, desulfurization product is solid sulfur ammonia, there isn't any new style waste water, waste residue and waste gas is generated in this invention. SO3, HCl and HF and other strong acid matter in exhaust gas is eliminated after through the tower, especially S03 that forming acid dew point corrosion is almost cleared up.

Description

technical field [0001] The invention relates to a method and a device for recovering sulfur dioxide from flue gas and producing ammonium sulfate fertilizer. Background technique [0002] Coal or oil-fired boilers or thermal power plants emit large amounts of exhaust gas (flue gas, flue gas). These flue gases contain SOx (such as SO 2 ), NOx (such as NO 2 ), HCl and HF and other harmful substances, among which SOx is the main substance that forms acid rain. [0003] Depending on the type of coal burned, SO 2 The content is usually 300-5000ppmv (1000-15000mg / Nm 3 )between. However, the amount of flue gas is huge. In terms of coal-fired boilers, the steam scale ranges from 35T / h to 2500T / h, the capacity of the generating set ranges from 6MW to 1000MW, and the flue gas amount varies from 50,000 Nm 3 / h to 2.5 million Nm 3 , SO 2 Emissions from 1,000 tons / year to 100,000 tons / year. Thanks to SO 2 It is an acidic gas, and the use of alkaline aqueous solution to remove SO...

Claims

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Application Information

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IPC IPC(8): C05C3/00B01D53/50
Inventor 肖博文
Owner 上海申川环保科技有限公司
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