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Biological sludge drying and incineration cycle treatment method and complete set of equipment

A biological sludge and recycling technology, applied in dewatering/drying/concentrating sludge treatment, combustion methods, lighting and heating equipment, etc., to achieve the effect of high environmental protection and safety, wide application range and saving project investment costs

Active Publication Date: 2017-12-01
宁波高新区纯丽节能技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although lime conditioning deep dehydration + landfill treatment is an important way of sludge treatment in my country at present, but this is only a temporary excessive treatment method. With the in-depth understanding of its disadvantages, the attitude of selection is becoming more and more cautious

Method used

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  • Biological sludge drying and incineration cycle treatment method and complete set of equipment
  • Biological sludge drying and incineration cycle treatment method and complete set of equipment
  • Biological sludge drying and incineration cycle treatment method and complete set of equipment

Examples

Experimental program
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Effect test

Embodiment 1

[0034] see figure 1 , the biological sludge drying and incineration cycle treatment method of the present invention, its realization process includes sludge drying treatment, dried sludge incineration treatment, biological sludge processing treatment, etc., wherein

[0035] 1) Sludge drying treatment

[0036] The biological sludge with a moisture content of 78-82% is added with reflux-dried sludge 1.2-1.5 times the weight of the biological sludge, fully stirred to obtain a mixed sludge with a moisture content of 38-42%, and then sent to the rotary sludge Drying treatment in the mud dryer;

[0037] 2) Dried sludge incineration treatment

[0038] Sieve 50-60% of the dried sludge after drying treatment, and send the sieved dried sludge to the fluidized sludge incinerator for incineration, and the high-temperature flue gas generated by the incineration is directly introduced into the rotary sludge dryer Intermediate drying treatment of mixed sludge;

[0039] The sludge inciner...

Embodiment 2

[0042] see figure 1 , the biological sludge drying and incineration cycle treatment method of this embodiment is different from that of Example 1 in that: during the sludge drying process, by controlling the feed rate of the sludge dryer, the speed of the dryer and the The high-temperature flue gas temperature generated by the incinerator is organically combined to control the discharge temperature and moisture content of the dried sludge. The discharge temperature of the dried sludge is 80-100 degrees, and the moisture content of the dried sludge is 15 ~20%, after cooling down to distribute moisture, dry sludge with a moisture content of 8-12% is obtained.

Embodiment 3

[0044] see figure 1 , the biological sludge drying and incineration recycling treatment method of this embodiment is different from that of Example 1 or Example 2 in that: it includes the biological sludge processing process, and the remaining 40 to 50% of the dried sewage will be incinerated. Add 22-28% biological sludge with a water content of 78-82% to the mud, stir thoroughly to obtain mixed sludge with a water content of 25-30%, and then use a sludge granulator to process the mixed sludge into biomass fuel Granules or organic fertilizer granules.

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Abstract

The invention relates to a biological sludge harmless and resourceful treatment method. A biological sludge drying and incineration cycle-treatment method comprises the following steps: 1) sludge drying treatment process: adding backflow drying sludge into biological sludge, fully stirring and drying by sending the sludge into a rotary sludge drier; 2) dried sludge incineration treatment process: sieving part of dried sludge after the drying treatment, incinerating the sludge by sending the sludge into a boiling-type sludge incinerator, directly introducing high temperature flue gas generated by the incineration into the rotary sludge drier so as to dry mixed sludge; introducing exhaust gas generated by drying and incineration of sludge into an exhaust gas washing tower, introducing exhaust gas which has undergone washing treatment back into the boiling-type sludge incinerator to be incinerated, and carrying out harmless treatment on residual exhaust gas; and 3) simultaneously carrying out the above biological sludge drying treatment process and dried sludge incineration treatment process and ceaselessly cycling the processes. Biological sludge drying and incineration cycle-treatment complete equipment comprises the rotary sludge drier and the boiling-type sludge incinerator.

Description

technical field [0001] The invention relates to a biological sludge harmless and resource-based treatment method, in particular to a biological sludge drying and incineration cycle treatment method and a complete set of equipment for realizing the method. Background technique [0002] According to the Ministry of Housing and Urban-Rural Development, as of the end of March 2014, a total of 3,622 sewage treatment plants have been built in cities and counties across the country, with a sewage treatment capacity of about 153 million cubic meters per day. Sludge, after dehydration treatment, the water content is about 80%, the biological sludge has a particularly high viscosity, and it is difficult to dehydrate again) the production volume is more than 40 million tons per year, and 80% of the sludge is not safely treated, because most sewage treatment plants There is no supporting sludge treatment facility. The "Water Ten Measures" issued by the State Council clearly stipulates:...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F11/16F23G7/00
CPCC02F11/16C02F2103/001F23G7/001F23G2201/10
Inventor 柳建国柳思佳
Owner 宁波高新区纯丽节能技术有限公司
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