Semi-automatic control method of feedback ventilation temperature in producing aerobic compost

A technology of temperature feedback and aerobic composting, which is applied in the preparation of organic fertilizers, organic fertilizers, fertilization devices, etc., can solve the problems of high labor intensity, the temperature of the lower layer cannot reach 55°C, and the poor effect of pathogenic bacteria, etc. The effect of temperature control time, shortening the processing cycle, and reducing energy consumption

Inactive Publication Date: 2003-08-20
TSINGHUA UNIV
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Problems solved by technology

Traditional composting mainly adopts the composting method. Due to the lack of effective control of the composting process, the composting cycle is long and the labor intensity is high, which cannot meet the increasing requirements of solid waste treatment.
The engineering application of compost temperature feedback ventilation automatic control has a history of more than 20 years abroad, but there are not many applications in our country at present
In the patent No. 00105833.9 and the patent No. 01120522.9, the instrument control and computer control of composting automatic control are reported respectively, wherein the instrument control is simple and practical, the price is lower, and the maintenance is also more convenient, but it can only control one heap body at a time; the computer control system Complicated, expensive, maintenance requires a high level of technology, and can control multiple stacks
At present, there are few applications of compost temperature feedback ventilation control in my country, and most of them are one-stage control, that is, the central temperature of the compost body is controlled at 55°C to 60°C during compost ventilation, and the fan blows continuously when the temperature exceeds 55°C to 60°C. When the temperature is lower than 55°C to 60°C, fan intermittent ventilation at fixed time intervals is used. This method has two defects: first, when the temperature control pile center is 55°C to 60°C, the temperature of the lower layer cannot reach 55°C. ℃, the effect of killing pathogenic bacteria is poor; second, when the temperature is lower than 55℃~60℃, a fixed ventilation rate is used, which makes it difficult to control the temperature of the compost at 55℃~60℃ in the later stage of composting. Lower temperature, lower water removal and substrate degradation capabilities

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  • Semi-automatic control method of feedback ventilation temperature in producing aerobic compost
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Embodiment Construction

[0006] The invention relates to a semi-automatic control method for temperature feedback ventilation of aerobic composting. Composting is a method for processing organic solid waste. During the treatment process, the temperature control and ventilation adopts the semi-automatic control technology of temperature feedback ventilation combining automatic and manual. , That is, in the first stage, control the temperature of the center of the compost body at 70°C to 75°C, which can kill pathogenic bacteria; Good; in the later stage of composting, artificially adjusting the opening and closing time of the fan can still keep the temperature of the compost at 55°C-60°C. Its control process is to detect compost body 1 central temperature by temperature sensor 2 (as figure 1 As shown), the temperature controller 3 sends the control signal to the AC contactor 5 to control its on-off; decide whether the blower 6 is blowing air, when the temperature is kept at the predetermined temperature...

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Abstract

The present invention is the semi-automatic control method of feedback ventilation temperature in producing aerobic compost in the compost temperature controlling technology. The semi-automatic control technology of feedback ventilation temperature combining automatic control and manual control is to control the compost center temperature in 70-75 deg.c and 55-65 deg.c in different stages. The said method can kill pathogenic bacteria, maintain optimized compost degradation and water elimination, maintain the set temperature through manually controlling the blower in the late stage for speeding fermentation and shortening processing period, lower power consumption, and realize harmless compost production.

Description

technical field [0001] The invention belongs to the technical scope of compost temperature control ventilation, and in particular relates to a semi-automatic control method for aerobic compost temperature feedback ventilation. Background technique [0002] Composting is one way to deal with the growing volume of solid waste. There are two main goals of composting: harmless and resourceful. Harmless refers to the killing of pathogenic bacteria through composting, and recycling refers to the rapid degradation, humification and rapid removal of excess water through composting substrates, so as to obtain good organic fertilizers. Therefore, in the composting process, the control objectives of the compost at different stages are different: (1) Harmless: In the composting stage 1, there are many substrates that are easily degraded in the composting process. Degradation, the temperature of the pile body also rises rapidly, by controlling the temperature of the pile body at a high...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09B3/00C05F17/00C05F17/02
CPCY02W30/40
Inventor 张相锋王洪涛周辉宇聂永丰
Owner TSINGHUA UNIV
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