Flue gas desulfurization device utilizing ammonia water and humate solution and desulfurization method
A desulfurization device and humate technology, which are applied in the field of flue gas desulfurization, can solve the problems of difficult by-product treatment, high consumption of steam energy for recovered products, large consumption of ammonia, etc., and achieve the effects of low comprehensive operation cost and considerable economic value.
Inactive Publication Date: 2010-12-22
SHANGHAI JIAO TONG UNIV
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Problems solved by technology
[0003] However, the wet ammonia absorption desulfurization technology has the following disadvantages: the desulfurization tower operates under acidic conditions, the equipment is corroded, and the energy consumption of the recovered product steam is large; and the semi-dry ammonia absorption desulfurization technology also has the following disadvantages: some by-products Difficult to handle, large ammonia consumption and serious ammonia escape, easy to cause secondary pollution
[0004] After searching the prior art, it is found that the document with the publication number CN101422697A adopts a mist eliminator to trap residual ammonia, but fails to fully solve the problem of ammonia escape, and the present invention can effectively remove all residual ammonia in the flue gas And the by-product of high-efficiency and high-quality compound fertilizer
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Embodiment 1
[0036] Flue gas composition: 78% N 2 , 18%CO 2 , 1000ppm of SO 2 and water vapor. Flue gas flow: 10Nm 3 / min; flow rate of ammonia water: 100ml / min; concentration of ammonia water: 5%; flow rate of humate solution: 1500ml / min; concentration of humate solution: 3%.
[0037] result:
[0038] Flue gas flow
Embodiment 2
[0040] Flue gas composition: 78% N 2 , 18%CO 2 , 1500ppm of SO 2 and water vapor. Flue gas flow: 10Nm 3 / min; flow rate of ammonia water: 150ml / min; concentration of ammonia water: 5%; flow rate of humate solution: 1500ml / min; concentration of humate solution: 3%.
[0041] result:
[0042] Flue gas flow
Embodiment 3
[0044] Flue gas composition: 78% N 2 , 18%CO 2 , 2000ppm of SO 2 and water vapor. Flue gas flow: 10Nm 3 / min; flow rate of ammonia water: 150ml / min; concentration of ammonia water: 8%; flow rate of humate solution: 1500ml / min; concentration of humate solution: 4%.
[0045] result:
[0046] Flue gas flow
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The invention relates to a flue gas desulfurization device utilizing ammonia water and a humate solution and a desulfurization method in the technical field of flue gas desulfurization. The flue gas desulfurization device comprises a desulfurization device, an oxidation device, a heat exchanger, a separation and dryness device and a residual ammonia absorbing device, wherein the oxidation device is connected with the output end of the desulfurization device; the output end of the oxidation device is successively connected with the heat exchanger, the separation and dryness device and the residual ammonia absorbing device in series; solid particles obtained by separating and drying the desulfurized solution are output to the residual ammonia absorbing device; and pumps and fans as flow delivery devices are arranged in connection pipes among the desulfurization device, the oxidation device, the heat exchanger, the separation and dryness device and the residual ammonia absorbing device. The invention can effectively reduce ammonia escape, the product can be recovered as a high-efficiency and high-quality composite fertilizer, the whole system stably and reliably operates, energy consumption is little, and desulfurization efficiency is high.
Description
technical field [0001] The invention relates to a device and method in the technical field of flue gas desulfurization, in particular to a flue gas desulfurization device and a desulfurization method using ammonia water and humate solution. Background technique [0002] The current flue gas desulfurization technologies mainly include limestone method, double alkali method and ammonia absorption method. The main disadvantage of the limestone method is the serious scaling and clogging problems. The double-alkali method was developed to overcome the easy scaling and clogging problems of the limestone method. It uses an aqueous solution of alkali metal salts to absorb SO 2 , then will absorb SO 2 The final solution is regenerated and recycled. Although the double-alkali method overcomes the problems of scaling and clogging, it is difficult to reuse the desulfurization products. There are two main types of ammonia absorption methods: wet type and semi-dry type, both of which ...
Claims
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IPC IPC(8): B01D53/78B01D53/50
Inventor 胡国新赵宇
Owner SHANGHAI JIAO TONG UNIV