Biomass waste hydrothermal processing method and system thereof

A biomass waste and hydrothermal treatment technology, applied in the pyrolysis treatment of sludge, the removal of solid waste, etc., can solve the problem of high energy consumption, achieve the effect of low labor intensity, high work efficiency, and improve the level of resource utilization

Active Publication Date: 2013-11-13
青岛伟华新能源科技有限公司
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  • Claims
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Problems solved by technology

[0005] The purpose of the present invention is to solve the problem of high energy consumption in the hydrothermal treatment technology of biomass waste in the prior art, and provide a hydrothermal treatment method and system, which can greatly reduce the energy consumption of the hydrothermal process while ensuring a good treatment effect. Reduce the cost of biomass waste treatment and improve the level of resource utilization

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  • Biomass waste hydrothermal processing method and system thereof
  • Biomass waste hydrothermal processing method and system thereof
  • Biomass waste hydrothermal processing method and system thereof

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Embodiment 1

[0061] Such as figure 1 , 2 As shown, the hydrothermal system adopts 1 slurry reactor 6, 4 hydrothermal reactors A, B, C, D and 1 flash reactor 8, has a pipeline 20 for inputting raw steam, and a shared Flash pipeline 30. There are necessary connecting pipes and various valves between each equipment. The following two processing methods can be used:

[0062] The first type: 2-stage flash evaporation: that is, primary flash evaporation: each hydrothermal reactor conducts a steam flash with another hydrothermal reactor; secondary flash evaporation: the material of each hydrothermal reactor Enter the flash reactor for a flash evaporation. The working sequence of each hydrothermal reaction unit is: feed material, input secondary steam, original steam, hydrothermal reaction, output secondary steam (for steam flash heat exchange of another hydrothermal reactor), discharge to flash reactor. In order to enable flash heat exchange between the hydrothermal reactors, the above four...

Embodiment 2

[0065] Such as image 3 As shown, on the basis of the above-mentioned embodiment 1, the hydrothermal system is changed to two hydrothermal reactors A, B, and two stages of flash evaporation. That is to say, both hydrothermal reactor A and hydrothermal reactor B complete the flash evaporation of steam once, and the sludge flowing out from hydrothermal reactor A and B enters the flash reactor to complete the final flash evaporation. In this embodiment, the hydrothermal reaction temperature is 160° C., and the reaction time is 105 minutes. After hydrothermal treatment, the sludge is cooled and dehydrated by a heat exchanger. As a result of the reaction, 27% of the suspended solids (SS) were dissolved, and the supernatant COD (SCOD) was 20,000 mg / L. The solids content of the dewatered cake was 59%. The raw steam consumption of the system is 0.25t / t sludge.

Embodiment 3

[0067] Such as Figure 4 As shown, on the basis of the above-mentioned embodiment 1, the hydrothermal system is changed to three hydrothermal reactors A, B, and C, and two stages of flash evaporation. That is, each of hydrothermal reactors A, B, and C completes one flash of steam respectively, and completes the flash steam heat exchange between hydrothermal reactors A and B, B and C, and A and C; from the hydrothermal reaction After the sludge flowing out of vessels A, B, and C enters the flash reactor, the final flash evaporation is completed. In this embodiment, the hydrothermal reaction temperature is 180° C., and the reaction time is 90 minutes. After hydrothermal treatment, the sludge is cooled and dehydrated by a heat exchanger. As a result of the reaction, 30% of the suspended solids (SS) were dissolved, and the supernatant COD (SCOD) was 20,000 mg / L. The solid content of the dewatered cake was 60%. The raw steam consumption of the system is 0.20t / t sludge.

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Abstract

The invention provides a biomass waste hydrothermal processing method and a system thereof. The method comprises the steps that: a material is sequentially subjected to slurrying preheating treatment, high-pressure-steam hydrothermal treatment, and flash evaporation treatment. Steam adopted in the hydrothermal treatment comprises raw steam and secondary steam. According to the secondary steam, with steam pressure difference between hydrothermal reaction devices, steam pressure and temperature equalization of the two hydrothermal reaction devices are finished. Through multilevel pressure equalization between the hydrothermal reaction devices, heat exchange efficiency is improved, and raw steam consumption amount can be reduced.

Description

technical field [0001] The invention relates to the technical field of viscous fluid or semi-solid waste treatment, in particular to a hydrothermal treatment method and system for biomass waste. Background technique [0002] Biomass waste includes sludge, kitchen waste, vegetable waste, poultry manure and other wastes containing a large number of living cells and any combination thereof. In recent years, with the popularization of urban sewage treatment facilities, the improvement of treatment capacity and the deepening of treatment degree, the amount of sludge generated has increased sharply at a rate of 10% per year. Sludge has complex components, high water content, difficult dehydration, high concentration of organic matter, pathogenic microorganisms, heavy metal ions and other harmful substances, and is often accompanied by stench. If it is not properly treated, it will cause serious secondary pollution and endanger the ecology. environment and human health. In additi...

Claims

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Application Information

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IPC IPC(8): B09B3/00C02F11/10
Inventor 邓舟夏洲张超范永信张丽颖
Owner 青岛伟华新能源科技有限公司
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