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Hydrothermal carbonization method of sludge

A technology of hydrothermal carbonization and sludge water, applied in the direction of oxidation treatment of sludge, pyrolysis treatment of sludge, etc., can solve the problems of harming the health of the staff, effectively removing and purifying a large amount of facility investment, and poor public acceptability, etc., to achieve The Effect of Harmless Treatment of Sludge Carbon

Inactive Publication Date: 2019-08-02
CHONGQING DULIANG IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, since the sludge incineration process will produce harmful gases, and the effective removal and purification of these gases requires a large amount of facility investment, this technology is facing two challenges: "high operating costs and poor public acceptability"
The existing sludge is easy to produce odor after long-term storage, and cannot effectively deal with the odor during treatment, which is likely to damage the health of the staff

Method used

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  • Hydrothermal carbonization method of sludge

Examples

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Effect test

Embodiment 1

[0037] A method for hydrothermal carbonization of sludge, comprising the steps of:

[0038] S1, pumping the sludge to the reactor, during which a catalyst is added to the sludge for catalytic wet oxidation treatment, the catalyst includes active components and / or ozone;

[0039] S2. Heating the reactor to generate a hydrothermal carbonization reaction.

[0040] Wet oxidation is an effective water treatment technology for toxic, harmful and high-concentration organic wastewater. Through wet oxidation treatment, the sludge is passed through a reactor equipped with a catalyst with high-efficiency oxidation performance, and the organic matter and substances containing N, S and other substances can be catalyzed and oxidized into CO 2 , H 2 O and N 2 , SO 4 and other harmless substances are discharged, thereby removing the volatile suspended matter in the sludge. In the process, the ammonia nitrogen contained in the sludge is catalyzed and oxidized by ozone, active components, ...

Embodiment 2

[0066] A method for hydrothermal carbonization of sludge, comprising the steps of:

[0067] S1. Pumping the sludge to the reactor, during which a catalyst is added to the sludge, and the catalyst includes active components and / or ozone for catalytic wet oxidation treatment;

[0068] S2. Heating the reactor to generate a hydrothermal carbonization reaction.

[0069] As a further improvement to the above technical solution, the mass ratio of catalyst to sludge in step S1 is 1:30.

[0070] As a further improvement to the above technical solution, in step S1, the catalyst is Fe 2 O 3 , CuO, MnO 2 Or a mixture of one or more active components in ZnO.

[0071] As a further improvement to the above technical scheme, the mixture includes Fe 2 O 3 , CuO and MnO2 various mixtures are mixed according to the mass ratio of 4:3:3.

[0072] It can be understood that if only CuO, MnO2 and ZnO are contained, the mass ratio is 3:3:1, and other similar cases are handled similarly.

[007...

Embodiment 3

[0085] In step S1, a catalyst is added to the sludge, wherein the mass ratio of the catalyst to the sludge is 2.5:30; at the same time, Fe 2 O 3 As an active component, it is used to catalyze the catalyst of wet oxidation treatment.

[0086] In step S14, the temperature of the reactor is adjusted to 280° C., and the pressure is adjusted to 6.5 MPa;

[0087] In step S15, the sludge is subjected to catalytic wet oxidation treatment for 1.5 hours;

[0088] In step S23, the temperature in the reactor is adjusted to 180° C., and the pressure in the reactor is adjusted to 1.8 MPa;

[0089] In step S24, the hydrothermal carbonization reaction time is 5.5 hours to obtain a carbonized product.

[0090] S25, performing solid-liquid separation on the carbonized product obtained in step S24, to obtain biochar and liquid phase product respectively.

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Abstract

The invention discloses a hydrothermal carbonization method of sludge. Firstly, sludge is pumped to a reactor, a catalyst is added to the sludge during pumping, and the catalyst comprises an active component and / or ozone for catalytic wet oxidation treatment; then, the reactor is heated for a hydrothermal carbonization reaction. Firstly, the catalyst is added to the sludge for catalytic wet oxidation treatment, volatile suspended solids in the sludge are removed, then, the rest sludge is subjected to hydrothermal carbonization treatment to be produced into charcoal, so that harmless treatmentof the sludge and emission reduction of sludge carbon are realized.

Description

technical field [0001] The invention relates to the technical field of environmental engineering sludge treatment, in particular to a sludge hydrothermal carbonization method. Background technique [0002] A large amount of sludge will be generated during sewage or wastewater treatment. Taking urban sewage treatment plants as an example, every 10,000 cubic meters of sewage will produce 5 to 10 tons of dewatered sludge (based on a moisture content of 80%). According to the requirements of my country's "Twelfth Five-Year Plan" National Urban Sewage Treatment and Reuse Facilities Construction Plan, by 2015, the scale of urban sewage treatment in my country will reach 208.05 million cubic meters per day. Based on this estimate, only urban sewage treatment plants in my country will 37.97-75.94 million tons of dewatered sludge will be produced every year; in addition to urban sewage treatment plants, papermaking, food processing, petrochemical, printing and dyeing industries all p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F11/06C02F11/10
CPCC02F11/06C02F11/10
Inventor 高峰
Owner CHONGQING DULIANG IND CO LTD
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