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Biochar preparation device and method for single-phase depressurization with nitrogen filling in batch mode

A preparation device and biochar technology, applied in the field of environmental engineering, can solve the problems of large nitrogen consumption and nitrogen consumption, and achieve the effects of low cost, reduced consumption, simple operation and easy control

Active Publication Date: 2014-10-15
安徽徽粮生物科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The pyrolysis process usually needs to be kept at a high temperature for an hour to several hours, and nitrogen gas is continuously fed at a high flow rate, which will undoubtedly consume a large amount of nitrogen gas
Therefore, if the main purpose of the process is to prepare biochar rather than to obtain biogas, the large nitrogen consumption will restrict the promotion of biochar preparation technology using this process

Method used

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  • Biochar preparation device and method for single-phase depressurization with nitrogen filling in batch mode
  • Biochar preparation device and method for single-phase depressurization with nitrogen filling in batch mode

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] The structural representation of the biochar preparation device of this embodiment is as follows: figure 1 As shown, it includes a container 1, a protruding opening 2 provided on the top of the container, an end cap 3 and a cover 4 provided at both ends of the container; the container can be designed into different volumes and shapes, depending on the needs of the production scale. The cover 3 is opened, and the biomass raw material can be filled into the container 1 in batches or continuously. Afterwards, the end cover 3 is closed to make it tightly sealed and isolated from the outside air.

[0035] Nitrogen is charged from one of the protruding openings 2, and the air is discharged from the other protruding opening 2. The process of nitrogen filling lasts for more than a certain period of time, so that the air in the container can be fully discharged, and then the convex is closed with a cover 4. Cover the opening 2, put it in a heating device to raise the temperature...

Embodiment 2

[0038]Take rice straw from the farms around Shanghai, crush it until the particle size is less than 2cm, put the material in a cylindrical iron container with a volume of 4L, and fill it with nitrogen gas from one of the protruding small holes with a diameter of 1cm. After filling the nitrogen gas for 10 minutes, measure the oxygen content in the container with a portable oxygen meter (CYS-1) to be 3%, and the system is in an oxygen-free environment. Put two small iron lids with a diameter of 1.3cm on the small holes, and place the container in a heating device at 18°C ​​min -1 The temperature was raised to 350°C and 500°C respectively, and kept for 4h, then cooled to room temperature, the biochar was taken out, weighed, and the yield of biochar was calculated to be 48.9% and 35.1% at the two temperatures, respectively, and the product was not collected. to liquid bio-oil. And the biochar is black without ashing components, which proves that the carbonization is carried out i...

Embodiment 3

[0040] Take cow dung from a farm in Baoshan District, Shanghai, air-dry it, and crush it to a particle size of 1-3mm. Nitrogen was charged for 8 minutes. After the nitrogen was filled, the oxygen content in the container was measured with a portable oxygen meter (CYS-1) to be 4%, and the system was in a near anaerobic environment. Put two small iron lids with a diameter of 1.3cm on the small holes, and place the container in a heating device at 18°C ​​min -1 The temperature was raised to 350°C and 500°C respectively, and kept for 2h, then cooled to room temperature, the biochar was taken out, weighed, and the yield of biochar was calculated to be 68.9% and 60.2% at the two temperatures, respectively, and the product was not collected. to liquid bio-oil. And the biochar is black without ashing components, which proves that the carbonization is carried out in an oxygen-free environment. According to the volume of the container, nitrogen gas is continuously passed 0.5L·min -1 ...

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Abstract

The invention discloses a batch type nitrogen gas filling single-phase pressure release low cost biological charcoal preparation apparatus and method thereof. The preparation apparatus comprises a container, and at least two protruding open lids which are arranged above the container whose number is identical to that of the protruding open pores, wherein, the diameter of the protruding open pore is 2-5 cm; the lids are covered on the protruding open pores. During preparation of biological charcoal, the biomass raw material is placed in the container, and nitrogen is filled through a protruding open pore, and the other protruding open pores discharge air; the lid is covered on the protruding open pore, and a pyrolysis apparatus is placed in a heating furnace, and the furnace is heated to 350-500 DEG C. for 1-4 hours, and then is cooled to the room temperature, and the substance is fetched from the container for obtaining the biological charcoal. The invention employs the batch type nitrogen gas filling mode to replace a continuous flow of nitrogen, and provides a biological charcoal preparation mode with substantial nitrogen saving and reduced carbon element loss, thereby improving carbon sequestration of biological charcoal and increasing yield of biological charcoal.

Description

technical field [0001] The invention relates to the technical field of environmental engineering, in particular to a low-cost biochar preparation device and method for batch-type nitrogen filling and single-phase pressure release. Background technique [0002] Pyrolysis technology is a biomass energy technology that has been studied more in recent years, that is, it uses biomass to pyrolyze and crack into small molecule gases (biogas) in the absence of oxygen, and simultaneously produces solids (biochar), liquids (bio-oil, etc.) )Technology. People put biomass in a container, continuously pass inert gas into it, exhaust air, make it in an anaerobic state, and then heat it to 350°C to 800°C at the same time to recycle energy. [0003] In recent years, the solid residue biochar produced in the pyrolysis process has attracted great attention, because it not only has the effect of carbon sequestration, but also can be used as an adsorbent for heavy metals or organic matter, and...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10B53/02C10B47/02
CPCY02E50/14Y02E50/10
Inventor 赵玲曹心德王群李飞跃续晓云杨帆
Owner 安徽徽粮生物科技有限公司
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