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Purification method and device dioxins in solid waste incineration fume

A technology for incinerating flue gas and solid waste, applied in chemical instruments and methods, separation methods, combined devices, etc., can solve problems such as unsatisfactory effects, and achieve the effects of reduced fly ash, low consumption, and low investment.

Inactive Publication Date: 2010-08-18
刘阳生
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are a few applications in domestic medical waste incinerators, but the effect is not very satisfactory

Method used

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  • Purification method and device dioxins in solid waste incineration fume
  • Purification method and device dioxins in solid waste incineration fume

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Example 1 Purification equipment for dioxin in solid waste incineration flue gas

[0030] As shown in Figure 1, the equipment used in the purification method of dioxin in the solid waste incineration flue gas comprises a cyclone dust collector 2, and the downstream of the cyclone dust collector 2 is connected with a first-stage bag filter 4, and the cyclone dust collector 2 and the first A modified activated carbon injection device 3 is arranged between the first-stage bag filter 4; A fresh activated carbon injection device 8 is provided, and the downstream of the second-stage bag filter 5 is connected to a chimney 11 through an induced draft fan 10 .

[0031] The cyclone dust collector is provided with an ash outlet 6 of the cyclone dust collector.

[0032] The first-stage bag filter is provided with a first-stage bag filter fly ash collection bin 7 .

[0033] The second-stage bag filter is provided with a waste activated carbon collection bin 9 for the second-stage ...

Embodiment 2

[0034] Example 2 Purification method of dioxin in solid waste incineration flue gas

[0035] Below in conjunction with accompanying drawing 1, the method for purifying dioxins in the solid waste incineration flue gas of the present invention will be further described.

[0036] As shown in Figure 1, the temperature is 150-200°C, and the solid waste incineration flue gas 1 after dry or semi-dry removal of acid gas has an original particle content of 1.5-6g / Nm 3 , into the cyclone dust collector 2, the flue gas velocity is 8 ~ 10m / s. More than 90% of the particles with a diameter of more than 10 μm are removed in the cyclone dust collector 2 .

[0037] The modified activated carbon is injected into the cyclone dust collector and the first-stage bag filter through the modified activated carbon injection device 3, and the air or steam delivery medium is sprayed countercurrently into the connecting pipe of the first-stage bag filter to mix with the flue gas. The modified activated ...

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Abstract

The invention discloses a purifying method and a device of dioxin in incineration flue gas of solid wastes, and the method comprises the following steps: 1) coarse particles are removed; 2) a first-stage bag dust collector is used for dust removal; 3) and a second-stage bag dust collector is used for dust removal. The device comprises a cyclone dust collector, the downstream of the cyclone dust collector is connected with the first-stage bag dust collector, and a modified activated carbon jet device; the downstream of the first-stage bag dust collector is connected with the second-stage bag dust collector, a fresh activated carbon jet device is arranged between the first-stage bag collector and the second-stage bag collector, and the downstream of the second-stage bag dust collector is connected with a chimney by an induced draft fan. The techique is simple, the operation cost is lower, and the requirements on the dioxin emission concentration of less than 0.1ng TEQ / Nm<3> in the flue gas can be met.

Description

technical field [0001] The present invention relates to a method and equipment for purifying dioxin in flue gas from solid waste incineration, in particular to a method and equipment for purifying dioxin in flue gas discharged from various solid waste incinerators . Background technique [0002] At present, the well-known technologies for purification of dioxins in solid waste incineration flue gas at home and abroad mainly include wet scrubbing, activated carbon and other adsorbent injection combined with bag filter for dust removal, and bag filter for dust removal combined with activated carbon adsorption bed and other methods. [0003] Wet scrubbing is widely used in Sweden and other European countries, and the dioxin removal efficiency is very high, and the dioxin concentration at the flue gas outlet can reach 0.1ng TEQ / Nm 3 Below, but a large amount of waste water is produced, which transfers dioxins from the gas phase into the water body, and then into the sludge; and...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/72B01D53/04B01D53/75B01D53/83B01D50/00
Inventor 刘阳生郑丽婷
Owner 刘阳生
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