Device and method for denitration and treating sludge containing organic matter by utilizing dry-method rotary kiln

A technology of organic matter and sludge, applied in the direction of dehydration/drying/concentrated sludge treatment, separation methods, chemical instruments and methods, etc., can solve the problems of difficult waste gas treatment, failure to find, shrinkage and easy collapse of materials, etc., to avoid disadvantages effect of influence

Active Publication Date: 2014-01-08
长沙紫宸科技开发有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

One is to dry it as an alternative fuel, especially by using the waste heat of the power plant, but the investment in drying is large, the operating cost is high, and the waste gas treatment is difficult
The second type is to use cement kiln for processing, and this type of processing method can be divided into three types: one is to use the waste heat treatment of grate cooler at the kiln head, because it affects the quality of clinker and the water vapor brought into the kiln affects the coal in the kiln. The second is to spray it into an external fluidized bed or an online decomposition furnace for treatment. Due to the excessive low-temperature moisture brought in, it absorbs heat and expands rapidly, affecting the external fluidized bed or decomposition. The pulverized coal burns in the kiln, and affects the ventilation in the kiln and the tertiary air, and the shrinkage is easy to collapse, the coal consumption increases, and it also affects the clinker production quality and the stability of the kiln condition; the third is to spray it into the kiln tail smoke chamber for treatment. Negative effects in the smoke chamber are similar to spraying into the calciner
[0004] CN101886811A discloses a method for co-processing high-moisture sludge with a new type of dry-process rotary kiln, in order to control the amount of moisture brought in by the sludge to be no more than 3% of the amount of raw meal, and try to reduce the amount of coal in the kiln and calciner. The impact of combustion is reduced to an acceptable range, but no matter whether it is free water or combined water, entering the kiln has a great impact on the combustion of pulverized coal; influences
But at present, there is no suitable and cheap hydrogen or hydrocarbons, or substances that can produce hydrogen and hydrocarbons, which can be added to the dry rotary kiln system at the right place to achieve the purpose of denitrification

Method used

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  • Device and method for denitration and treating sludge containing organic matter by utilizing dry-method rotary kiln
  • Device and method for denitration and treating sludge containing organic matter by utilizing dry-method rotary kiln

Examples

Experimental program
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Effect test

Embodiment 1

[0022] This embodiment is an embodiment of a device for treating sludge containing organic matter in a dry-process rotary kiln that takes into account denitrification, including a dry-process rotary kiln preheater system, and the dry-process rotary kiln preheater system includes a calciner 6, a calciner gooseneck Pipe 3, the fourth-stage cyclone 8, the fifth-stage cyclone 7, the fifth-stage cyclone to the fourth-stage cyclone ascending pipe 11, and the upper part of the fourth-stage cyclone 8 communicates with the top of the fifth-stage cyclone 7 through the ascending pipe 11. The first-stage cyclone 7 communicates with the calciner 6 through the calciner gooseneck 3, and is also provided with a sludge tank 1, a mud pump 2, and an air gun group 5, and the sludge tank 1 is provided with a power stirring device or an inflating device. The sludge tank 1 is connected to the downstream section 10 of the calciner gooseneck 3 through the mud conveying pipeline 4, between the sludge ta...

Embodiment 2

[0024] This example is an example of a method for treating sludge containing organic matter using the device for treating sludge containing organic matter in a dry-process rotary kiln with consideration of denitrification in Example 1. The specific operation steps are:

[0025]Use the mud pump (piston pump) 2 to spray the municipal sludge (moisture content 81wt%) in the sludge tank 1 into the space between the decomposition furnace 6 and the preheater five-stage cyclone 7 through the mud delivery pipeline 4 along the airflow direction In the descending section 10 of the gooseneck pipe 3 of the calciner, the amount of sludge injection is 5.0t / h. In the pipeline, the organic matter and water in the organic matter sludge are gasified and vaporized rapidly, and the inorganic matter is dried rapidly, and the The gooseneck of the calciner, the fifth-stage cyclone, the ascending pipe from the fifth-stage cyclone to the fourth-stage cyclone, and the area space of the fourth-stage cycl...

Embodiment 3

[0027] This embodiment is an embodiment of the method for treating sludge containing organic matter by using the device for treating sludge containing organic matter in a dry-process rotary kiln with consideration of denitrification in Embodiment 1. The specific operation steps are:

[0028] Use the mud pump 2 to spray the printing and dyeing factory sludge (moisture content 71wt%) in the sludge tank 1 into the calciner gooseneck between the calciner 6 and the five-stage cyclone 7 of the preheater through the mud conveying pipeline 4 along the airflow direction In the descending section 10 of the pipe 3, the amount of sludge sprayed is 3.5t / h. In the pipeline, the organic matter and water in the organic sludge are gasified and vaporized rapidly, and the inorganic matter is dried rapidly, and are discharged in the gooseneck of the calciner. Tube, fifth-stage cyclone, ascending pipeline from fifth-stage cyclone to fourth-stage cyclone, and area space denitration of fourth-stage ...

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Abstract

The invention provides a device and a method for denitration and treating sludge containing organic matter by utilizing a dry-method rotary kiln. The device comprises a dry-method rotary kiln preheater system, wherein the dry-method rotary kiln preheater system comprises a decomposing furnace, a decomposing furnace gooseneck pipe, a five-level cyclone, a four-level cyclone, and a rising channel from the five-level cyclone to the four-level cyclone; the five-level cyclone is communicated with the decomposing furnace by the decomposing furnace gooseneck pipe and is also provided with a sludge tank, a slurry pump and an air cannon group; and a power stirring device or an inflating device is arranged in the sludge tank. The invention also provides the method for denitration and treating sludge containing organic matter by utilizing the dry-method rotary kiln. With the adoption of the device and the method, the production kiln of the dry-method rotary kiln and the combustion of coal powder in the furnace are not affected, the consumption of coal is not increased, the kiln condition and the yield and quality of clinker are not affected, the cost is low, and the environmental protection is realized.

Description

technical field [0001] The invention relates to a device and method for treating sludge containing organic matter, in particular to a device and method for treating sludge containing organic matter in a dry-process rotary kiln that takes denitrification into consideration. Background technique [0002] Municipal sludge and other sludge containing organic matter, such as printing and dyeing factory sludge, generally have a moisture content of 75-85%. In addition to some inorganic substances, they also contain a large amount of organic hydrocarbons and pathogenic microorganisms or toxic and harmful substances. , Harmless disposal is very difficult. [0003] At present, advanced processing technologies at home and abroad can be roughly divided into two categories. One is to dry it as an alternative fuel, especially using the waste heat of the power plant to dry it, but the investment in drying is large, the operating cost is high, and the waste gas treatment is difficult. The...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F11/12B01D53/79B01D53/56
Inventor 尹小林
Owner 长沙紫宸科技开发有限公司
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