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Municipal sludge treatment and fertilizer preparation system based on pyrohydrolysis-ultrahigh-temperature aerobic fermentation

A municipal sludge and aerobic fermentation technology, which is applied in the field of municipal sludge treatment, can solve the problems of affecting the efficiency of sludge treatment and disposal, the influence of ambient temperature, and the high ratio of material addition, so as to achieve cost reduction, long duration of high temperature, and high fermentation efficiency. The effect of cycle reduction

Pending Publication Date: 2022-02-08
BEIJING DRAINAGE GRP CO LTD
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Problems solved by technology

At the same time, the traditional sludge aerobic composting technology is easily affected by the ambient temperature, the treatment cycle is about 30d-60d, and the longest can reach 70d in winter, which affects the efficiency of sludge treatment and disposal
How to solve the problems of high material dosing ratio and long process cycle in sludge aerobic composting technology need to be solved urgently

Method used

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  • Municipal sludge treatment and fertilizer preparation system based on pyrohydrolysis-ultrahigh-temperature aerobic fermentation

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Embodiment 1

[0052] This embodiment provides a kind of municipal sludge treatment fertilizer system based on thermal hydrolysis-ultra-high temperature aerobic fermentation, such as figure 1 As shown, the municipal sludge treatment fertilizer system includes sequentially connected:

[0053] Pre-dehydration unit 1, thermal hydrolysis unit 2, plate and frame dehydration unit 3, ultra-high temperature aerobic fermentation unit 4, crushing unit 5, extrusion granulation unit 6, screening unit 7;

[0054] Thermal hydrolysis unit 2 is sequentially connected with anaerobic digestion unit 8, centrifugal dehydration unit 9, filtrate treatment unit 91, and concentration unit 92;

[0055] Plate and frame dehydration unit 3 is connected with anaerobic digestion unit 8;

[0056] The hyperthermia aerobic fermentation unit 4 includes a fermenter (not shown).

[0057] It also includes a nutrient soil collection unit 10, which is connected with the screening unit 7.

[0058] Also comprise the methane coll...

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Abstract

The invention belongs to the field of municipal sludge treatment, and particularly relates to a municipal sludge treatment and fertilizer preparation system based on pyrohydrolysis-ultrahigh-temperature aerobic fermentation. The municipal sludge treatment and fertilizer preparation system comprises a pre-dehydration unit, a thermal hydrolysis unit, a plate and frame dehydration unit, an ultrahigh-temperature aerobic fermentation unit, a crushing unit, an extrusion granulation unit and a screening unit which are connected in sequence, wherein the pyrohydrolysis unit is sequentially connected with an anaerobic digestion unit, a centrifugal dehydration unit, a filtrate treatment unit and a concentration unit; and the plate and frame dehydration unit is connected with the anaerobic digestion unit. The by-products (methane, plate and frame filtrate and the like) generated in the municipal sludge treatment process can be applied to each treatment unit, so that the energy consumption loss is reduced; and the invention provides a sludge treatment and disposal scheme, and provides technical support for later sludge recycling.

Description

technical field [0001] The invention belongs to the field of urban sludge treatment, and more specifically relates to an urban sludge treatment fertilizer system based on thermal hydrolysis-ultra-high temperature aerobic fermentation. Background technique [0002] As of the end of 2019, the annual discharge of urban sewage in my country was 55.465 billion cubic meters, and there were 2,471 sewage treatment plants with a daily treatment capacity of 179 million cubic meters. The annual sewage treatment capacity was 52.585 billion cubic meters, and the sewage treatment rate was 96.81%. As a derivative of sewage, my country's annual sludge output has exceeded 60 million tons in 2019 (calculated at a moisture content of 80%), and it is expected that my country's annual sludge output will exceed 90 million tons in 2025. Therefore, a large amount of sludge generated in the sewage treatment process needs to be treated urgently. [0003] Sludge contains a large number of nutrient el...

Claims

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Application Information

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IPC IPC(8): C05F17/964C05F17/80C05F17/60C05F7/00C02F11/04
CPCC05F17/964C05F17/80C05F17/60C05F7/00C02F11/04Y02A40/20Y02W30/40
Inventor 王佳伟魏琳琳李魁晓孙冀垆于斓贺赟田雅琦
Owner BEIJING DRAINAGE GRP CO LTD
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