System for removing acid gas in waste incineration

An acid gas and waste incineration technology, applied in gas treatment, dispersed particle filtration, membrane technology, etc., can solve problems such as the failure to reach the reaction temperature of dry deacidification, the inability to cool the flue gas of the boiler, and the easy excess of flue gas emissions. , to achieve the effect of ensuring long-term economic operation, saving resources and reducing the number of shutdowns

Pending Publication Date: 2021-04-09
JINING POLYTECHNIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0013] However, during the normal operation of the power plant, if the rotary atomizer fails and cannot operate, the flue gas from the boiler cannot be cooled, and the reaction temperature of the dry deacidification cannot be reached, so SO2 and HCL cannot be removed, and the flue gas emission is easily exceeded. The power plant can only be forced to shut down

Method used

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  • System for removing acid gas in waste incineration
  • System for removing acid gas in waste incineration
  • System for removing acid gas in waste incineration

Examples

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Effect test

Embodiment 1

[0042] The overall deacidification process of the present invention is different from that of the prior art figure 1 The same, but the deacidification reaction tower and the setting in the pipeline are different. to combine Figure 2-3A system for removing acid gas in waste incineration, comprising a control host, a deacidification reaction tower 1, a bag filter, an induced draft fan and a chimney.

[0043] The deacidification reaction tower 1 is provided with a gas inlet and a gas outlet. The gas outlet of the deacidification reaction tower 1 is connected to the bag filter through the first pipeline 6. The bag filter is connected to the induced draft fan through the second pipeline, and the induced draft fan introduces the gas into the chimney to be discharged. ;

[0044] The deacidification reaction tower 1 is equipped with a rotary atomizer 2 inside, and the melody atomizer sprays out a mixture of process water and lime slurry to remove the acid gas in the flue gas; the p...

Embodiment 2

[0052] The method of using the above-mentioned device is as follows:

[0053] The temperature value detected by the temperature detector 4 is T, the acid gas concentration detected by the acid gas concentration detector 5 is D, the unit time supply of lime slurry and process water is M, and the unit time supply of slaked lime of the special nozzle for slaked lime is N, The opening number of the two-fluid atomizing spray gun 3 is P;

[0054] Among them, because the work of lime slurry and process water and the work of the two-fluid atomization spray gun 3 will affect the temperature T of the flue gas, so the control host detects whether the temperature T is greater than the optimum temperature T0 of dry acid removal, if T > T0, then increase the number P of the two-fluid atomizing spray gun 3 to be opened; if T

[0055] In addition, because the work of lime slurry and process water and the work o...

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Abstract

The invention relates to a system for removing acid gas in waste incineration. After the two-fluid atomizing spray gun is additionally arranged on the deacidification reaction tower, up-to-standard emission of acid gas can be effectively guaranteed under the condition that the rotary atomizer breaks down, the frequency of furnace shutdown is reduced, and long-term economic operation of a power plant is guaranteed. According to the device, the semi-dry method acid removal efficiency is monitored and discharged in real time, system faults can be found in real time, after the acid gas concentration detector is arranged, the next step of slaked lime treatment can be carried out according to the actually needed material amount, unnecessary waste is reduced, the environment is protected, and resources are saved. In addition, the temperature detector is multipurpose, so that temperature reference can be provided for next treatment, and temperature correction value can be provided for the acid gas detector in real time.

Description

technical field [0001] The invention relates to the field of garbage treatment, in particular to an acid gas removal system in garbage incineration. Background technique [0002] At present, the main processes for acid gas removal in waste incineration power generation industry are dry method, semi-dry method and wet method. [0003] (1) Dry purification process [0004] The dry method is to spray slaked lime into the reactor through a special nozzle. [0005] Let the surface of the slaked lime particles directly contact the acid gas in the flue gas to produce a chemical neutralization reaction. The reaction must have a suitable temperature, generally 140°C, to generate harmless neutral salt particles, and then enter the downstream granular matter for removal equipment. In the dust collector, the reaction products are captured together with the flue gas dust and unreacted absorbent to achieve the purpose of purifying the acid gas. The dry purification process is simple, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/80B01D53/40B01D53/34B01D46/02
CPCB01D53/80B01D53/40B01D53/346B01D46/023B01D2258/0291
Inventor 杜秀艳苏常美
Owner JINING POLYTECHNIC
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