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Device and method for preparing ammonium persulfate from ammonia and urea solution flue gas purification absorption liquid

A technology for ammonium persulfate and flue gas purification, applied in the direction of electrolysis, electrodes, diaphragms, etc., can solve problems such as complex components, achieve high separation efficiency, short process flow, and convenient installation

Active Publication Date: 2017-05-10
SOUTHEAST UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the relatively complex components in the ammonia / urea solution flue gas simultaneous desulfurization and denitrification absorption liquid, and a small amount of additives, the electrolytic production (NH 4 ) 2 S 2 o 8 In addition to the theoretical and experimental research conducted by Xiong Yuanquan's research team at Southeast University, there are no other related research reports at home and abroad.

Method used

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  • Device and method for preparing ammonium persulfate from ammonia and urea solution flue gas purification absorption liquid
  • Device and method for preparing ammonium persulfate from ammonia and urea solution flue gas purification absorption liquid

Examples

Experimental program
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Effect test

Embodiment 1

[0033] Embodiment 1: the device that ammonia and urea solution flue gas purification absorbing liquid of the present invention makes ammonium persulfate, comprises by being arranged on the plate type diaphragm 5, anode chamber 1 and cathode chamber 2 in the middle of the electrolytic cell body, is arranged in the anode chamber 1 There are an anode chamber outlet 6 and an anode chamber inlet 7, a titanium platinum-plated anode plate 3 is arranged on the inner wall, a cathode chamber outlet 8 and a cathode chamber inlet 9 are arranged in the cathode chamber 2, a titanium cathode plate 4 is arranged on the inner wall, and the anode chamber inlet 7 is connected with an anolyte liquid supply pump 13 and an anode flowmeter 15, the flow rate at the inlet of the anode chamber is controlled by the anolyte liquid supply pump 13 and the anode flowmeter 15, and the cathode chamber inlet 9 is connected with a catholyte liquid supply pump 14 and a cathode flowmeter 16. The flow rate at the i...

Embodiment 2

[0035] Embodiment 2: pump the absorption liquid in the absorption liquid storage tank 19 at the bottom of the desulfurization and denitrification absorption tower 18 into the neutralization reactor 23 through the neutralization pump 22 of the desulfurization and denitrification circulating liquid, and neutralize the liquid of the circulating liquid by adding a certain amount of ammonia water. The pH is adjusted between 4-6, and the neutralized solution (the concentration of ammonium sulfate in the solution is 328g / L, the mass concentration of ammonium sulfite is 56g / L, and the mass concentration of ammonium nitrate is 12g / L, the mass concentration of ammonium nitrite is 4.3g / L, the mass concentration of urea is 1.15g / L, the mass percentage concentration of diethanolamine and triethanolamine is 0.015%, the anode oxygen suppression additive ammonium thiocyanate (or polyphosphoric acid Ammonium) accounts for 0.01% mass percentage concentration of the absorption liquid obtained by ...

Embodiment 3

[0036] In embodiment 3, the mass percentage concentration of the sulfuric acid solution pumped into the cathode chamber 2 is 40%, and the oxygen inhibitor pumped into the anode chamber 1 accounts for the mass percentage concentration of the absorption liquid obtained by the ammonia and urea solution flue gas purification process is 0.055%. The basic process and other parameters are the same as in Example 1.

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Abstract

The invention discloses a device and a method for preparing ammonium persulfate from ammonia and urea solution flue gas purification absorption liquid. The device mainly includes a tank, a cathode plate, an anode plate, a diaphragm, an anolyte liquid storage tank; an anolyte liquid supply pump, an anode flow meter, a catholyte liquid storage tank, a Catholyte liquid supply pump, a cathode flowmeter and DC steady-state power supply. The anode plate and the cathode plate are oppositely arranged, and both are connected to the power supply, so as to generate an electric field between the cathode plate and the anode plate. The method prepares ammonium persulfate by desulfurizing and denitrifying absorbing liquid based on an electrolytic cell, and adopts a flat diaphragm to separate catholyte and anolyte; through these improvements, appropriate reaction voltage, temperature and time are controlled. It can effectively convert low-value-added ammonium sulfate products into high-value-added ammonium persulfate products. The method is simple to operate, can be applied to the treatment of desulfurization and denitrification absorption liquid, and has the characteristics of environmental protection and high efficiency.

Description

technical field [0001] The invention belongs to the field of processing flue gas desulfurization and denitrification absorption liquid in atmospheric environmental protection, and relates to a device and a method for preparing ammonium persulfate by utilizing ammonia and urea solution flue gas purification absorption liquid. Background technique [0002] At present, whether it is ammonia flue gas desulfurization, wet lime-gypsum flue gas desulfurization, or simultaneous wet flue gas desulfurization and denitrification, there is a secondary green treatment problem with high added value of the absorption liquid. In my country's actual projects, wet flue gas desulfurization and denitrification absorption liquids are seldom realized in a complete sense of recycling resources, which has caused a large number of wet flue gas desulfurization and denitrification absorption liquids in my country to produce secondary pollution to varying degrees. The problem, especially the secondary p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25B1/28C25B9/08C25B11/10C25B13/04C25B9/19
Inventor 熊源泉王颖张平
Owner SOUTHEAST UNIV