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Preparation method of hazardous waste granular fuel

A technology for pellet fuel and hazardous waste, which is applied in the field of preparation of hazardous waste pellet fuel, can solve the problem of inapplicability of similar liquid hazardous waste, etc., and achieve the effects of reducing treatment cost, environmental protection of hazardous waste treatment, and wide application range.

Inactive Publication Date: 2019-10-15
张家港百赫科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Moreover, the existing biomass pellet fuel technology is not suitable for the treatment of similar liquid hazardous waste due to the dehydration problem of hazardous waste.

Method used

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  • Preparation method of hazardous waste granular fuel

Examples

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Embodiment 1

[0031] This embodiment provides a preparation method of hazardous waste particulate fuel. The hazardous waste of the preparation method adopts waste emulsion. See Table 1 for its physical and chemical properties. The preparation method specifically includes the following steps:

[0032] (1) The biomass powder and waste emulsion are added to the jacketed stirring mixing dehydrator at a mass ratio of 1:0.2, the jacket heating temperature is 110°C during the stirring process, and the material is discharged when the moisture content is about 20% .

[0033] (2) Compress the dehydrated material in step (1) into pellet fuel.

[0034] The biomass powder in this example was prepared by the following method:

[0035] (1) Pre-treatment: remove stones, iron, ash and other impurities in waste wood chips;

[0036] (2) Drying: Put the pretreated wood chips into the dryer, the drying temperature is 110℃, the residence time is 20min, and the material is discharged after drying;

[0037] (3) Mixing and c...

Embodiment 2

[0041] This embodiment provides a method for preparing hazardous waste particulate fuel, except that the mass ratio of biomass powder to waste emulsion is 1:0.4, the others are the same as in embodiment 1.

Embodiment 3

[0043] Take the hazardous waste produced by refining and chemical enterprises as an example. The sludge hazardous waste is mainly slop oil with high water content, low heating value, and difficult combustion. The physical and chemical parameters of sludge oil are shown in Table 1.

[0044] This embodiment provides a method for preparing hazardous waste particulate fuel, including the following steps:

[0045] (1) The biomass powder and slop oil are added to the jacketed stirring mixing dehydrator according to the mass ratio of 1:2.3. The jacket heating temperature is 110°C during the stirring process, and the material is discharged when the water content is about 20%.

[0046] (2) Compress the dehydrated material in step (1) into pellet fuel.

[0047] The biomass powder in this example is the same as in Example 1.

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Abstract

The invention relates to a preparation method of hazardous waste granular fuel. The preparation method comprises: (1) mixing, stirring and dehydrating biomass powder and hazardous waste according to amass ratio of 1:(0.2-9) until the moisture content of the mixture is less than or equal to 30%; and (2) pressing the material dehydrated in the step (1) into granular fuel. After the hazardous wasteis treated by the method, the obtained hazardous waste granular fuel is homogenized in physical and chemical properties, low in water content and high in heat value. When the hazardous waste granularfuel is incinerated, high-price fuel such as natural gas does not need to be supplemented, so that the hazardous waste treatment cost is greatly reduced; by means of the method, hazardous waste treatment is more environment-friendly, and the application range is wider.

Description

Technical field [0001] The invention belongs to the technical field of hazardous waste treatment, and specifically relates to a method for preparing hazardous waste particulate fuel. Background technique [0002] Hazardous waste forms are solid, colloidal and liquid, with a moisture content of 60-85%, a calorific value of 0-9GJ / t, ash content of 0.5-80%, and a density of 1g / cm 3 about. In the prior art, due to the different physical and chemical properties of hazardous waste, different hazardous waste treatments usually adopt different treatment methods according to the form of hazardous waste. [0003] For example, sludge hazardous wastes are currently combined with biomass to make biomass pellet fuels. For example, a method for preparing composite biological pellet fuels disclosed in Chinese Patent CN102002410 includes: (1) Treating oily sludges Concentration; (2) The concentrated sludge is mixed with a flocculant to dehydrate the flocculated sludge with a water content of 70-80...

Claims

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Application Information

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IPC IPC(8): C10L5/48C10L5/44C10L9/10
CPCC10L5/442C10L5/48C10L9/10C10L2290/08C10L2290/24C10L2290/32Y02E50/10Y02E50/30
Inventor 彭江红
Owner 张家港百赫科技有限公司
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