Smoke purifier of domestic refuse incinerator

A domestic waste incineration and flue gas purification technology, applied in incinerators, combined devices, combustion types, etc., can solve the problems of blocked return pipes, bag sticking, frequent load fluctuations, and high operating costs, so as to avoid blockage and wear , reduce operational failures, and lower quality requirements

Active Publication Date: 2007-01-17
HANGZHOU NEW CENTURY ENERGY ENVIRONMENTAL PROTECTION ENG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This patent provides a valuable theory on the temperature range of adding sodium-alkali modified lime in the flue gas area of ​​the waste incinerator to reduce the synthesis of dioxins, but the purification devices including sealed feeding devices and cyclone dust collectors are used , there are still the problems of the aforementioned existing flue gas purification devices: the neutralizer is required to have high quality and high concentration, and the circulating fly ash cannot be used, so its operating cost is high; at the same time, when the load changes greatly, the adjustment is more troublesome
However, when it is used to purify domestic waste incinerator smoke, it will cause frequent load fluctuations, large fluctuations, and poisonous gas due to the wide variety and uncertainty of the waste content, so the following problems will occur: 1) Due to the single variety of neutralizing agent, it is difficult to adjust the load fluctuation, so the purification effect is affected; 2) when lime dry powder is used as neutralizing agent, the consumption is large due to the low utilization rate of neutralizing agent; 3) due to water and The ratio of ash is difficult to control and it is easy to cause blockage, so the failure rate of the system is high; 4) It cannot remove toxic gases such as dioxin
In particular, it cannot adjust the amount of returned materials and the amount of neutralizing agent in t

Method used

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  • Smoke purifier of domestic refuse incinerator
  • Smoke purifier of domestic refuse incinerator
  • Smoke purifier of domestic refuse incinerator

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0017] Embodiment 1, the structure of the flue gas purification device of the domestic waste incinerator of the present embodiment can be obtained from figure 1 Seen in, it contains a gas inlet 1a, slag outlet 1b, lime dry powder Ca(OH) 2The nozzle 1g, the reaction tower 1 of the flue gas outlet 1e, and the pre-dust collector 2, bag filter 4, and induced draft fan 5 connected in sequence to the flue gas outlet of the reaction tower. Wherein the bottom of the reaction tower 1 has a Venturi tube, that is to say, the bottom of the tower body has a constriction section that gradually reduces the cross-section from bottom to top and a diffusion section that gradually expands the cross-section upward, so that the flue gas can flow freely after low-resistance injection. Immediately change to a high speed and enter the reaction zone; the spout 1g of dry lime powder is arranged on the tower wall where the Venturi tube diffusion section is located; the present embodiment device is also ...

Example Embodiment

[0036] Embodiment 2, the purification device of the present embodiment also from figure 1 Seen in, it differs from Example 1 in that: the reaction tower 1 is also provided with a return pipe 9 communicated with the return device 6 and a circulating fly ash nozzle 1d, and the return device 6 is connected with the bag filter 4 and The fly ash outlet on the pre-dust collector 2 is connected. The fly ash captured in the purification process can be used as return ash to return to the reaction tower through the circulating fly ash nozzle 1d on the outlet end of the return pipe 9 for recycling. The return ash contains fly ash particles, residual neutralizer, and neutralizer, which together with the fly ash in the flue gas participate in the drying, catalysis, and chemical reactions in the tower, so that the utilization rate of the neutralizer can be maximized, and The reaction products in the flue gas, the circulating fly ash and the sprayed neutralizer increase the contact reaction...

Example Embodiment

[0037] Embodiment 3, the purification device of the present embodiment also from figure 1 It can be seen from the above that it is different from Embodiment 1 or Embodiment 2 in that: its return device 6 is also equipped with a return cage 6' that can adjust the outflow of the return material through a frequency converter and has an overflow ash Pipe 8 overflow cage 7. Thus, the purifying device of this embodiment can automatically adjust the frequency of the frequency converter on the return cage 6' according to the flue gas differential pressure and the flue gas flow rate in the reaction tower, and change the return amount of fly ash; and in the return feeder When the fly ash is redundant, it can be sent to the ash conveying device (not shown in the figure) provided outside through the overflow cage 7 and the overflow ash pipe 8

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Abstract

This invention is a kind of smoke purifier device of domestic garbage incinerator. The system is arranged with lime dry powder and water spraying, lime slurry spraying and active carbon spraying devices to automatically start and adjust spraying to eliminate the acidic gas, toxic gas and dust. This invention includes smoke inlet opening, slag tap, lime dry powder ejector, reaction tower at smoke outlet, pre-dust remover, bag-type dust remover and draught fan. The reaction tower is also arranged with ejectors for water, slurry and atomized air. The active carbon mixer, thermocouple and acidic gas detector are arranged in front of the bag-type dust remover. This invention has little operation failure.

Description

technical field [0001] The invention relates to a flue gas purification device for removing acid gases such as HCL, SOx, HF, toxic gas dioxins and dust in the flue gas produced by domestic garbage incineration, especially a kind of flue gas purification device which is equipped with a separate dry lime powder and Water injection system, lime slurry injection system and activated carbon injection system to realize the dual-purpose semi-dry dry powder and water injection system and / or lime slurry injection system that can be automatically activated and adjusted according to the flue gas temperature, flow rate and acid gas content. The flue gas purification device of the domestic waste incinerator. Background technique [0002] As we all know, the smoke of ordinary coal-fired boilers must be purified before being discharged into the atmosphere because it contains harmful gases such as incompletely burned carbon monoxide and sulfur dioxide and fly ash; There are many items, esp...

Claims

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Application Information

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IPC IPC(8): F23J15/02F23G5/44B01D53/75B01D50/00
Inventor 张星群王柯龚佰勋姜宗顺方涛任少清
Owner HANGZHOU NEW CENTURY ENERGY ENVIRONMENTAL PROTECTION ENG CO LTD
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