Comprehensive utilization method of pig manure on the basis of carbonization pyrolysis technology

A pig manure and pyrolysis technology, which is applied in the field of comprehensive utilization of pig manure based on carbonization and pyrolysis technology, can solve the problems of technical bottlenecks, secondary pollution, and low treatment efficiency, and achieve perfect environmental protection technology, high thermal efficiency, and full utilization of waste heat Effect

Inactive Publication Date: 2017-09-15
FUJIAN YUYI ENVIRONMENT TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Biochemical treatment of livestock and poultry manure, such as biogas projects and fuel ethanol, has problems such as low treatment efficiency, easy to cause secondary pollution, and technical bottlenecks

Method used

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  • Comprehensive utilization method of pig manure on the basis of carbonization pyrolysis technology
  • Comprehensive utilization method of pig manure on the basis of carbonization pyrolysis technology

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] The process is mainly composed of three parts: multi-stage drying of pig manure, carbonization and pyrolysis of pig manure and flue gas treatment, such as figure 1 .

[0030] (1) Multi-stage drying of pig manure

[0031] The pig manure is transported by the transport vehicle to the pig manure storage pit, firstly measured, and then sent to the pyrolysis furnace of the pig manure dryer by the conveyor belt, and then enters the pyrolysis furnace through the double-roller feeder, and is evenly and loosely distributed. On the pyrolysis furnace grate. In the pyrolysis furnace, the pig manure is dried by the first-level dryer and the second-level dryer from top to bottom. The pig manure is dried in the primary dryer at 90°C for 50 minutes to remove most of the moisture. The temperature of the secondary dryer is 110°C and the drying time is 40 minutes. The moisture content of pig manure is reduced to below 1%. .

[0032] (2) Pig manure carbonization pyrolysis

[0033] Aft...

Embodiment 2

[0040] The process is mainly composed of three parts: multi-stage drying of pig manure, carbonization and pyrolysis of pig manure and flue gas treatment, such as figure 1 .

[0041] (1) Multi-stage drying of pig manure

[0042] The pig manure is transported by the transport vehicle to the pig manure storage pit, firstly measured, and then sent to the pyrolysis furnace of the pig manure dryer by the conveyor belt, and then enters the pyrolysis furnace through the double-roller feeder, and is evenly and loosely distributed. On the pyrolysis furnace grate. In the pyrolysis furnace, the pig manure is dried by the first-level dryer and the second-level dryer from top to bottom. The pig manure is dried in the primary dryer at 80°C for 45 minutes to remove most of the moisture, and the temperature of the secondary dryer is 105°C, and the drying time is 30 minutes, and the moisture content of the pig manure is reduced to below 1%. .

[0043] (2) Pig manure carbonization pyrolysis

...

Embodiment 3

[0051] Pig manure was provided by a pig farm in the suburbs of Fuzhou. After natural air-drying until the moisture content is about 45%, it is transported to the pig manure storage pit by a transport vehicle, and about 1,000 tons of pig manure is weighed, and it is transferred to the pyrolysis furnace of the pig manure dryer by the conveyor belt in batches, and fed by double rollers. feeder into the pyrolysis furnace, evenly and loosely spread on the grate of the pyrolysis furnace. In the pyrolysis furnace, the pig manure is dried from top to bottom by primary drying and secondary drying. The generated high-temperature flue gas (845°C) is discharged through the exhaust port, passes through the dust collector, desulfurization tower and smoke elimination tower, and enters the condenser, so that the temperature of the flue gas is rapidly reduced to 200°C, and can be discharged into the atmosphere up to the standard. The dried manure enters the carbonization pyrolysis system, the...

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Abstract

The invention provides a comprehensive utilization method of pig manure on the basis of carbonization pyrolysis technology. Through steps including multi-stage drying to the pig manure, carbonization pyrolysis to the pig manure, flue gas treatment and the like, the pig manure is subjected to dry pyrolysis in a furnace, high-temperature pyrolysis gasification, and re-pyrolysis gasification to flue gas (outlet flue gas temperature is higher than 850 DEG C), wherein retention time of flue gas in the furnace is prolonged to more than 2 sec. In the whole pyrolysis process, generation of PCDDs / PCDFs harmful substances is effectively inhibited. Through quenching cooling to high-temperature flue gas, re-synthesis of dioxin is effectively avoided. Main measurements, such as a desulfurization column, adsorption in a smoke removal column, liquefaction in a condenser and the like, are all employed in the technology, so that national smoke and dust discharge standard at present can be satisfied.

Description

technical field [0001] The invention belongs to the field of biological treatment, and in particular relates to a comprehensive utilization method of pig manure based on carbonization and pyrolysis technology. Background technique [0002] The large-scale and intensive development of the pig breeding industry has led to the concentrated production of a large amount of pig manure. It is estimated that the amount of fresh pig manure in China in 2011 was about 922 million tons. And this number will increase year by year. A large amount of pig manure discharged not only releases foul-smelling liquids, solids and gases, but also carries pathogenic microorganisms, antibiotics and heavy metals. Untreated or substandard discharge into the environment will cause a variety of environmental problems. [0003] The biggest problem in the treatment and utilization of pig manure is that they have a high water content and an unpleasant smell. A large amount of ammonia nitrogen is easily v...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F11/10C02F103/20
CPCY02W10/40C02F11/10C02F2103/20
Inventor 黄伟萱陈白云
Owner FUJIAN YUYI ENVIRONMENT TECH CO LTD
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