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Preparation method of energy-saving sludge-based adsorbent

An adsorbent and energy-saving technology, which is applied in the field of adsorbent preparation, can solve the problems of poor environmental protection and high energy consumption, and achieve the effect of enhanced adsorption effect, obvious gasification atmosphere and obvious effect

Inactive Publication Date: 2015-09-02
ZHEJIANG UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In order to overcome the disadvantages of high energy consumption and poor environmental protection of the existing sludge treatment methods, the present invention provides an energy-saving sludge-based adsorbent preparation method that effectively reduces energy consumption and improves environmental protection performance

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  • Preparation method of energy-saving sludge-based adsorbent

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preparation example Construction

[0017] refer to figure 1 , a method for preparing an energy-saving sludge-based adsorbent, the preparation method comprising the following steps:

[0018] In the first step, the blending activator FeCl 2 The remaining wet sludge with a moisture content of 60-90% is placed in the heating zone of the pyrolysis reactor of the external heating tube furnace, in which the activator FeCl 2 The mass-number ratio of the wet sludge sample with a moisture content of 60-90% is: 1: (10-20);

[0019] Carry out pyrolysis reaction under nitrogen atmosphere: heating rate is 70-80°C / min, pyrolysis temperature is 550°C-560°C, stay for 10-15 minutes, nitrogen blowing rate is 25-30ml / min; when the reaction is finished, close the tube furnace and Nitrogen cylinder switch, after cooling, sludge pyrolysis residue is obtained;

[0020] The second step is to collect sludge pyrolysis residues for grinding, and pass through a 50-70 mesh sieve to obtain sludge residue particles;

[0021] In the third ...

example 1

[0025] Example 1: A preparation method of an energy-saving sludge-based adsorbent, the preparation method comprising the following steps:

[0026] In the first step, the blending activator FeCl 2 The remaining wet sludge with a moisture content of 60% is placed in the heating zone of the pyrolysis reactor of an external heating tube furnace, in which the activator FeCl 2 The mass-number ratio of the wet sludge sample with a moisture content of 60% is: 1:10;

[0027] Carry out pyrolysis reaction under nitrogen atmosphere: heating rate 70°C / min, pyrolysis temperature 550°C, stay for 10 minutes, nitrogen blowing rate 25ml / min; turn off the tube furnace and nitrogen bottle switch after the reaction is completed, and obtain sludge after cooling Pyrolysis residue;

[0028] The second step is to collect sludge pyrolysis residues for grinding, and pass through a 50-mesh sieve to obtain sludge residue particles;

[0029] In the third step, the sludge residue particles are washed wit...

example 2

[0031] Example 2: A preparation method of an energy-saving sludge-based adsorbent, the preparation method comprising the following steps:

[0032] In the first step, the blending activator FeCl 2 The remaining wet sludge with a moisture content of 70% is placed in the heating zone of the pyrolysis reactor of the external heating tube furnace, in which the activator FeCl 2 The mass-number ratio of the wet sludge sample with a moisture content of 70% is: 1:15;

[0033] Carry out pyrolysis reaction under nitrogen atmosphere: heating rate is 76°C / min, pyrolysis temperature is 555°C, stays for 12 minutes, nitrogen blowing rate is 28ml / min; after the reaction is finished, turn off the tube furnace and nitrogen bottle switch, and obtain sludge after cooling Pyrolysis residue;

[0034] The second step is to collect sludge pyrolysis residues for grinding, and pass through a 60-mesh sieve to obtain sludge residue particles;

[0035] In the third step, the sludge residue particles are...

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Abstract

The invention discloses a preparation method of an energy-saving sludge-based adsorbent. The preparation method comprises the following steps: (1) placing residual wet sludge at a heating zone of a pyrolysis reactor of an external-heated tube furnace, wherein the residual wet sludge is doped with an activator FeCL2 and the content of moisture of the residual wet sludge is 60-90%, the mass part ratio of the FeCl2 to the residual wet sludge is 1 to (10-20), performing pyrolysis in a nitrogen atmosphere, wherein the temperature rising speed is 70-80 C degree per minute, the pyrolysis temperature is 550-560 C degree, the stay time is 10-15 minutes and the nitrogen blowing speed is 25-30ml per minute, switching off the tube furnace and a switch of a nitrogen tank after the reaction is completed and cooling to obtain pyrolyzed sludge residue; (2) collecting the pyrolyzed sludge residue, grinding, sieving with a 50-70 mesh screen to obtain sludge residue particles; and (3) washing the sludge residue particles with distilled water till a washing liquid is neutral and drying to obtain the sludge-based adsorbent. According to the preparation method, the energy consumption is effectively reduced and the environment friendliness is improved.

Description

technical field [0001] The invention relates to a method for preparing an adsorbent. Background technique [0002] Sludge treatment is one of the challenging topics in the engineering field. With the rapid increase of sludge production and the advancement of urbanization, sludge treatment must follow stricter environmental standards and the treatment principles of "harmless, reduced, stabilized, and resourceful". Conventional methods of sludge treatment mainly include land use, landfill, and incineration. But there are certain defects and deficiencies, and it is difficult to meet the increasingly stringent environmental protection requirements. The pyrolysis method is to use the thermal instability of the organic matter in the sludge to heat and dry it under the condition of anaerobic or anoxic, so that the organic matter can be thermally cracked, and after condensation, the synthetic gas, bio-oil and solids with high utilization value are produced. Residue, these product...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20B01J20/30C02F11/10C02F103/30
CPCY02W10/37Y02W10/40
Inventor 胡艳军王久兵郑小艳严密任建莉韩龙
Owner ZHEJIANG UNIV OF TECH
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