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Multifunctional biological drying conditioner and preparation method thereof

A biological drying and multi-functional technology, applied in biological sludge treatment, chemical instruments and methods, dehydration/drying/thickened sludge treatment, etc., can solve the problem of polyethylene glycol losing heat storage, biochar hole collapse, Biochar loss and other problems, to achieve the effect of maintaining heat, prolonging the high temperature period, and improving efficiency

Active Publication Date: 2021-11-09
HEFEI CEMENT RES DESIGN INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Biochar itself has the characteristic of hydrophilicity. As a conditioner, it is added to the biological drying system, which is easily affected by the moisture in the system. A large amount of water will block the pores, so that the biochar will lose the function of storing oxygen in the pores. Long-term immersion will also make the biochar The pores collapse, and a large amount of water enters the pores of the conditioner, which will also dissolve the polyethylene glycol in the pores and lose the heat storage property

Method used

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  • Multifunctional biological drying conditioner and preparation method thereof

Examples

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Effect test

Embodiment 1

[0047] A preparation method of a multifunctional biological drying conditioner:

[0048] Take a certain amount of dewatered sludge, place it in an oven at 105°C, dry it for 24 hours, and weigh it several times until it reaches a constant weight. Use an electronic balance to accurately weigh 50g of dried sludge samples, grind them evenly, add 10ml of coal tar, and put them into a granulator for granulation. Put the granulated sludge into a rotary tubular pyrolysis furnace, pass in a mixed gas (8vt% oxygen, 92vt% nitrogen), rotate at a speed of 10r / min, and pyrolyze at 900°C for 2h, and place the prepared porous carbon spheres in a dissolved 10g In dehydrated ethanol of polyethylene glycol (analytically pure, molecular weight 10000), immerse porous carbon spheres, put them in a suction filter bottle after standing and blending for 12 hours, start the vacuum pump, and filter for 30 minutes under the condition of a vacuum degree of 0.1MPa Then take out the sample and place it on ...

Embodiment 2

[0051] Take a certain amount of dewatered sludge, place it in an oven at 105°C, dry it for 24 hours, and weigh it several times until it reaches a constant weight. Use an electronic balance to accurately weigh 50g of dried sludge samples, grind them evenly, add 10ml of coal tar, and put them into a granulator for granulation. The sludge after granulation is put into a rotary tube type pyrolysis furnace, and a mixed gas (8vt% oxygen, 92vt% nitrogen) is introduced, and the rotating speed is 10r / min, and it is pyrolyzed at 900°C for 2h, and polyethylene glycol with a molecular weight of 6000 and Polyethylene glycol with a molecular weight of 10,000 was mixed according to a weight ratio of 1:1, and 10 g of the mixed polyethylene glycol was accurately weighed and dissolved in absolute ethanol, and the porous carbon spheres were immersed in it, and placed in a pump after standing and blending for 12 hours. In the filter bottle, start the vacuum pump, perform suction filtration for 3...

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Abstract

The invention belongs to the technical field of sludge resource utilization, and particularly relates to a multifunctional biological drying conditioner and a preparation method thereof. The method comprises the steps that biomass is subjected to granulation and micro-aerobic activation to obtain porous carbon spheres; and polyethylene glycol is loaded on the porous carbon spheres, and then the porous carbon spheres are subjected to surface hydrophobic modification to obtain the multifunctional biological drying conditioner. According to the invention, polyethylene glycol is encapsulated in micropores and mesopores of the porous carbon spheres to prevent leakage; microorganisms are attached in the macroporous structure, so that contact with the outside can be kept, and an environment suitable for growth can be provided; and a silane coupling agent is used for surface hydrophobic modification to obtain a porous carbon sphere structure with a hydrophobic surface and a hydrophilic interior, the interior of the porous carbon sphere structure is hydrophilic to provide a suitable growth environment for thermophilic microorganisms, the surface hydrophobicity does not damage the conditioner structure, water is prevented from blocking holes, a moist and oxygen environment needed by microorganism growth is reserved, heat is kept through a heat storage material, and the high-temperature period of the biological drying system is prolonged.

Description

technical field [0001] The invention belongs to the technical field of sludge resource utilization, in particular to a multifunctional biological drying conditioner and a preparation method thereof. Background technique [0002] Sludge biological drying technology is a treatment process that utilizes the biological heat generated by microbial aerobic respiration to degrade organic matter in sludge, cooperates with forced ventilation to promote water evaporation, and quickly and effectively dries sludge without adding external heat energy. During the drying process, the loss of organic matter and calorific value is small, and it has the advantages of low energy consumption, stable equipment operation and flexible product application. However, the current sludge biological drying technology still has bottleneck problems such as low microbial oxygen utilization rate and short duration of high temperature section, which lead to long time consumption and large land occupation, so...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/318C01B32/336C02F11/02C02F11/12C02F11/13
CPCC01B32/318C01B32/336C02F11/02C02F11/13C02F11/12Y02P20/141C02F11/10C01B32/05
Inventor 黄婷李宁朱兵张山谢姗姗陈磊
Owner HEFEI CEMENT RES DESIGN INST
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