High-temperature melting treatment system and method for sludge

A high-temperature melting and treatment system technology, applied in combustion methods, separation methods, pyrolysis treatment of sludge, etc., can solve problems such as dioxin pollution, and achieve the effect of realizing emissions and reducing operating costs.

Active Publication Date: 2012-07-04
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In order to solve the problem of dioxin pollution in the existing sludge incineration met

Method used

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  • High-temperature melting treatment system and method for sludge
  • High-temperature melting treatment system and method for sludge
  • High-temperature melting treatment system and method for sludge

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Experimental program
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specific Embodiment approach 1

[0036] Specific implementation mode one: combine figure 1 Describe this embodiment, the high-temperature melting treatment system of sludge in this embodiment, the system includes a ball mill 50 and a high-temperature melting treatment device for sludge, and the high-temperature melting treatment device for sludge includes a furnace body, an overflow slagging Port 2, slag pool 3, membrane water wall 30, steam drum 25, high temperature superheater 12, low temperature superheater 13, high temperature economizer 14, high temperature air preheater 15, SCR denitrification system 16, low temperature economizer 17. Low temperature air preheater 18, sprayer 20, flue gas quenching tower 19, bag filter 21, ash bin 24, flue gas wet desulfurization system 22, induced draft fan 23, chimney 25 and flue 32;

[0037] The furnace body is composed of an integrated melting chamber 5, a contraction section flue gas outlet 7 and a secondary combustion chamber 9 from bottom to top. The lower part o...

specific Embodiment approach 2

[0038] Specific implementation mode two: combination figure 1 , Figure 3-Figure 5 Explain, the high-temperature melting treatment method of the sludge of the present embodiment, the high-temperature melting treatment method of the sludge is completed by the following steps:

[0039] Step 1, the sludge is firstly dried, and the moisture content of the dried sludge is less than 10%;

[0040] Step 2, sending the dried sludge into the ball mill 50 to be ground into a powder with a particle size less than 100 μm;

[0041] Step 3: first heat the primary air to 150-180°C through the low-temperature air preheater 18, and then heat it to 350-400°C through the high-temperature air preheater 15; after that, pass the dried sludge powder obtained in step 2 into the The feed port 1 and the primary air are sent tangentially into the melting chamber 5 to form a vortex combustion to a high-temperature melting state. When the melting chamber 5 is in a high-temperature melting state, the temp...

specific Embodiment approach 3

[0045] Specific implementation mode three: combination figure 2 Explain, the high-temperature melting processing system of sludge in this embodiment, the system includes a ball mill 50 and a high-temperature melting processing device for sludge, and the high-temperature melting processing device for sludge includes a furnace body, an overflow slagging outlet 2, Slag pool 3, high temperature air preheater 15, SCR denitrification system 16, low temperature air preheater 18, sprayer 20, flue gas quenching tower 19, bag filter 21, ash bin 24, flue gas wet desulfurization system 22, Induced fan 23, chimney 25 and flue 32;

[0046] The furnace body is composed of an integrated melting chamber 5, a shrinkage section flue gas outlet 7 and a secondary combustion chamber 9 from bottom to top. The lower part of the side wall of the melting chamber 5 is provided with a feed port 1, and the ball mill 50 is arranged outside the furnace body. The outlet of the ball mill 50 is in communicat...

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Abstract

The invention discloses a high-temperature melting treatment system and a method for sludge, and relates to a sludge treatment system and a sludge treatment method. The system and the method solve the problem that dioxine exists in sludge incineration methods in prior arts. A first device comprises a melting chamber with a furnace body integrally manufactured from a lower side to an upper side, a shrinking section smoke outlet and a secondary combustor, high temperature and low temperature superheaters arranged in a smoke duct, high temperature and low temperature coal economizers, high temperature and low temperature air preheaters, and an SCR (selective catalytic reduction) denitration system, wherein the smoke duct is communicated with a smoke fast cooling tower, the smoke fast cooling tower is communicated with a bag-type dust collector, and the bag-type dust collector is communicated with a chimney by a smoke wet desulphurization system and a draught fan. The first method comprises the steps of feeding dry sludge powder into the melting chamber for burning to a high-temperature melting state, recycling liquid-state slag and reusing, treating high-temperature smoke after entering the smoke duct, and discharging. The differences between a system in a second scheme and the first device are as follows: the high temperature and low temperature superheaters and the high temperature and low temperature coal economizers are not arranged, and a steam heat exchanger is additionally arranged. A difference between a system in the third scheme and the second scheme is as follows: a multistage sludge dryer is additionally arranged. The high-temperature melting treatment system and method for the sludge are used for high-temperature melting treatment of the sludge.

Description

technical field [0001] The invention relates to a sludge treatment system and method, in particular to a high-temperature melting treatment system and method for sewage sludge. Background technique [0002] Sludge is the solid residue after sewage treatment, which contains a large number of harmful substances such as germs, parasites, and heavy metals. If it is not handled properly, it will cause great harm to the ecological environment, and the problem of sludge treatment has become a major issue in sewage treatment today. A bottleneck, so the harmless treatment of sludge has become an urgent problem in environmental protection. [0003] The main methods of foreign sludge treatment are from the initial landfill method to the composting method to the drying method until the current incineration method. In my country, landfill is still the most widely used sludge treatment method. This method not only occupies a large amount of land, but also pollutes groundwater resources d...

Claims

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Application Information

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IPC IPC(8): F23G7/00C02F11/10B01D53/75B01D53/56B01D53/70B01D53/50B01D50/00
Inventor 别如山纪晓瑜宋兴飞朱少飞黄兵刘茜茜陈佩
Owner HARBIN INST OF TECH
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