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Ammonia-process desulfurization method and device for chamber-division ammonification

An ammonia desulfurization and compartmentalized technology, which is applied in separation methods, chemical instruments and methods, dispersed particle separation, etc., and can solve problems such as ammonia escape.

Active Publication Date: 2017-09-29
JIANGSU NEW CENTURY JIANGNAN ENVIRONMENTAL PROTECTION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In order to overcome the problems of ammonia escape and aerosol formation in the existing ammonia desulfurization method, the inventors have carried out diligent research

Method used

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  • Ammonia-process desulfurization method and device for chamber-division ammonification
  • Ammonia-process desulfurization method and device for chamber-division ammonification

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Experimental program
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Effect test

Embodiment 1

[0065] The flue gas from the coal combustion process is subjected to ammonia desulfurization using the inventive device, wherein the device is basically as follows Figure 1-3 As shown in , except that the oxidation chamber and the ammoniation chamber are provided by two tanks outside the absorption tower, the two tanks are provided with DN500 connecting pipes in the middle; the circulating liquid from the lower outlet of the ammoniation chamber enters the primary spray absorption section In the upper part, the circulating liquid from the lower outlet of the oxidation chamber enters the upper part of the secondary spray absorption section; the reflux liquid from the primary and secondary spray absorption sections joins at the gas-liquid separator between the cooling concentration section and the primary spray absorption section , a total of 2700m 3 / h, 60% of the reflux liquid goes to the ammonia chamber, and 40% of the reflux liquid goes to the oxidation chamber; the liquid a...

Embodiment 2

[0069] Repeat the test of Example 1, except that the oxidation chamber and the ammoniation chamber are arranged in the same groove with a diameter of 5.5m, the cross-sectional area of ​​the ammoniation chamber is 18% of the cross-sectional area of ​​the groove, and the top of the ammoniation chamber is larger than that in the oxidation chamber. The liquid level is 1m lower; 13 balance ports are opened on the lower part of the side of the ammonia addition chamber, and 22 balance holes are opened on the top plate, with a single hole size of 80×80mm. Semi-cylindrical shape with a volume of 27m 3 , the volume of the oxidation chamber is 220m 3 ; The spray liquid from the primary and secondary spray absorption sections is combined, wherein 70% of the combined reflux liquid is combined with 2522kg / h of 20% ammonia water and then enters the ammonia addition chamber, and the rest of the reflux liquid enters the oxidation chamber.

[0070] The pH of the circulating liquid taken out fr...

Embodiment 3

[0073] Adopt the device of embodiment 1 to test, except that the oxidation chamber and the ammonia addition chamber are arranged in the same tank with a diameter of 6m, the cross-sectional area of ​​the ammonia addition chamber is 20% of the cross-sectional area of ​​the tank, and the top of the ammonia addition chamber is larger than that of the oxidation chamber. The liquid level in the tank is 1.5m lower; 8 balance ports are opened on the lower part of the side of the ammonia addition chamber, and 13 balance holes are opened on the top plate. The size of each hole is 100×100mm. Room volume is 25m 3 , located in the middle of the tank, it is a horizontal tank type, and the volume of the oxidation chamber is 228m 3 ; The spray liquid from the primary and secondary spray absorption sections is not combined, and is sent to the ammoniation chamber and the oxidation chamber respectively, and the flow rate of the reflux liquid to the ammoniation chamber is 1700m 3 / h, and the ref...

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Abstract

The invention discloses an ammonia-process desulfurization method for chamber-division ammonification. The method is characterized in that an oxidation section comprises an oxidation chamber and an ammonification chamber which are in mutual fluid communication, and an ammonia absorbing agent is added into the ammonification chamber. Preferably, an absorption-oxidation cycle of the method comprises a liquid cycle between the oxidation chamber and a secondary spraying absorption section and a liquid cycle between the ammonification chamber and a primary spraying absorption section, and the mutual series flow of the two cycles is realized at least through fluid communication between the oxidation chamber and the ammonification chamber. The invention further discloses a device for implementing the method.

Description

Technical field: [0001] The invention relates to an ammonia desulfurization method and device for adding ammonia in separate chambers. More specifically, the present invention relates to an ammonia desulfurization method and device with compartmentalized ammonia addition, wherein the oxidation section includes at least one oxidation chamber and at least one ammoniation chamber, and ammonia absorbent is added to the ammoniation chamber. Background technique: [0002] At present, the mainstream processes for removing sulfur dioxide from gases in the world are limestone desulfurization method and ammonia desulfurization method. The limestone desulfurization method will produce a large amount of waste water and gypsum slag during the desulfurization process, and the treatment of these waste water and waste residue requires a lot of investment and operation costs. Moreover, in the limestone desulfurization method, about 0.7 tons of carbon dioxide are simultaneously produced for ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/78B01D53/50B01D53/76
CPCB01D53/502B01D53/76B01D2251/2062B01D53/504B01D2252/102B01D2251/11B01D2258/0283B01D53/507B01D53/04B01D53/48Y02A50/20B01D53/78
Inventor 罗静徐长香许祥俊罗勇迎
Owner JIANGSU NEW CENTURY JIANGNAN ENVIRONMENTAL PROTECTION
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