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Sludge biological asphalt and preparation method thereof

A bio-asphalt and sludge technology, applied in the direction of building structure, construction, building components, etc., can solve the problem of how to use by-products that are not mentioned, and achieve the effect of realizing resource utilization and alleviating dependence

Active Publication Date: 2021-08-06
CHONGQING JIAOTONG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The above-mentioned patent documents do not mention how the by-products are utilized

Method used

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  • Sludge biological asphalt and preparation method thereof
  • Sludge biological asphalt and preparation method thereof

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[0029] The preparation method of the sludge bio-asphalt of the present invention comprises the following steps: a sludge drying step; a sludge reaction step; a solid-liquid separation step; a step of obtaining sludge heavy oil; and a mixing step of sludge heavy oil and petroleum asphalt.

[0030]

[0031] The sludge is dried at 100-110°C, preferably, the sludge is dried at 105-110°C. This is beneficial to the reaction of the sludge in the presence of alcohol and increases the yield of heavy oil from the sludge. The prior art usually directly mixes this sludge with asphalt. In the present invention, it is further processed to improve the performance of sludge bio-asphalt.

[0032]

[0033] Add the dried sludge and alcohol with a weight ratio of 1:10-20 into the reactor, stir and heat, and react for 30-120 minutes at a reaction temperature of 265-300°C and a reaction pressure of 5-11MPa. The temperature was lowered to obtain a reaction mixture. According to one embodiment...

Embodiment 1

[0065] Dry the sludge at 105°C to constant weight;

[0066] Add 40 parts by weight of dried sludge and 600 parts by weight of absolute ethanol into the reactor, seal the device and check the air tightness, then feed nitrogen to replace the air in the reactor, stir and heat, at the reaction temperature The temperature was 275°C, the reaction pressure was 9MPa, and the reaction was carried out for 60 minutes, and the temperature was lowered to obtain the reaction mixture;

[0067] The reaction mixture was suction filtered to obtain solid and mother liquor;

[0068] The mother liquor is distilled under reduced pressure with a rotary evaporator (distillation temperature is 200°C, vacuum degree is 0.1MPa), and concentrated until almost no fraction is separated to obtain sludge heavy oil (black viscous liquid).

Embodiment 2

[0070] The 50# base petroleum asphalt of 95 parts by weight is heated to a flow state at 135° C.;

[0071] Add 5 parts by weight of sludge heavy oil prepared according to Example 1 to the fluid petroleum asphalt, and shear at a high speed at 135°C (shear rate is 2000rpm, and the shear time is 30min) to obtain sludge bio-asphalt .

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Abstract

The invention discloses a sludge biological asphalt and a preparation method thereof. The preparation method comprises the following steps: (1) adding dried sludge and alcohol in a weight ratio of 1: (10-20) into a reaction kettle, stirring and heating, reacting for 30-120 minutes under the conditions that the reaction temperature is 265-300 DEG C and the reaction pressure is 5-11 MPa, and cooling to obtain a reaction mixture; (2) carrying out solid-liquid separation on the reaction mixture to obtain a solid and a mother solution; (3) concentrating the mother solution to obtain sludge heavy oil; (4) mixing the sludge heavy oil with petroleum asphalt to obtain sludge biological asphalt; wherein the weight ratio of the sludge heavy oil to the petroleum asphalt is (5-30): (70-95). The sludge biological asphalt prepared by the preparation method disclosed by the invention is relatively good in performance.

Description

technical field [0001] The invention relates to sludge bio-asphalt and a preparation method thereof. Background technique [0002] On the one hand, with the acceleration of urbanization and the improvement of people's living standards, the output of urban sewage in my country has also increased sharply, and as the terminal product of sewage treatment plants, the output of sludge has also increased accordingly. At the same time, sludge contains a large number of toxic and harmful substances that are difficult to degrade, such as pathogenic bacteria, parasites, radioactive elements and heavy metal elements, as well as non-toxic organic substances and nutrients (nitrogen, phosphorus, potassium and various trace elements), if not handled properly, it will cause serious harm to the ecological environment and human health. Therefore, the disposal of municipal sludge has aroused people's great attention. [0003] On the other hand, with the rapid growth of my country's economy, t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L95/00C08L91/00C08K11/00
CPCC08L95/00C08L91/00C08K11/005
Inventor 曹雪娟雷运波邓梅李志豪尚婷苗成成卢治琳
Owner CHONGQING JIAOTONG UNIVERSITY
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