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Method for preparing mixed fuel by cooperatively treating organic matter-containing hazardous waste in cement plant

A mixed fuel and co-processing technology, applied in the direction of fuel, solid fuel, petroleum industry, etc., can solve problems such as shortage, increased heat consumption, and easy impact

Inactive Publication Date: 2020-10-23
长沙紫宸科技开发有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] (3) The incineration method of feeding materials into the grate cooler in the kiln hood, that is, putting combustible waste directly into the grate cooler for incineration, which will easily affect the cooking
The common defects of this kind of method: First, it is easy to cause the accumulated material in the kiln tail smoke chamber to stick and block
The second is that the heavy metals in the solid waste are not reduced, inhibited and pre-cured, which will easily cause the reduction and volatilization of heavy metals and the volatilization of chlor-alkali sulfur, which will aggravate the crusting of smoke chambers and shrinkage, affect the stability of kiln conditions, and increase heat consumption.
The third is that there is no transitional reduction and inhibition treatment for combustibles such as carbon-containing organic matter and sulfides in solid waste. The combustibles will aggravate the reduction crust of the smoke chamber and shrinkage
[0018] Obviously, the existing carbon-containing organic hazardous waste technology is insufficient

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] In this example, a certain hazardous waste disposal company warehouse number category HW04 solid pesticide waste is selected, and the cement factory laboratory tests: moisture 0.37%, loss on ignition 76.18%, SiO 2 1.37%, Al 2 O 3 0.59%, Fe 2 O 3 0.85%, CaO 9.1%, MgO1.94%, K 2 O 0.06%, Na2O 3.49%, Cl 3.11%, S 2.95%, F 0.35%, low calorific value 4127Kcal / Kg.

[0038] The oxidation promoter used in this example is potassium ferrate, benzoic acid, and cerium nitrate, and the mass ratio of potassium ferrate, benzoic acid, and cerium nitrate is 1:1.5:3; the stabilizer is potassium silicate, sodium metaaluminate, and The mass ratio of potassium silicate to sodium metaaluminate is 1:1.6.

[0039] This embodiment proceeds as follows:

[0040] (1) Modification treatment: In the process of crushing, rolling and mixing of solid pesticide waste, oxidation promoter equivalent to 1.9% of the mass of solid pesticide waste is added, and heavy metal ion equivalent to 3.1% of the mass of soli...

Embodiment 2

[0052] The test uses a certain hazardous waste treatment company warehouse number category HW06 liquid organic solvent waste, laboratory sampling test: pH 6.5-8, moisture 67.9-72.0%, ignition loss 90.69-99.98%, SiO 2 0.17~5.31%, Al 2 O 3 0.02~0.11%, Fe 2 O 3 0.01~0.14%, CaO 0.01~1.5%, MgO 0.00~0.05%, K 2 O 0.01~0.07%, Na 2 O 0.01~0.42%, Cl 0.04~1.16%, S 0.01~0.05%, F 0.01~1.05%. The low calorific value is 1896~2475Kcal / Kg.

[0053] The oxidation promoter used in the experiment was sodium benzoate, lithium nitrate and potassium percarbonate. The mass ratio of sodium benzoate, lithium nitrate and potassium percarbonate was 1:1.5:1; the stabilizer was phytic acid.

[0054] This embodiment proceeds as follows:

[0055] (1) Modification treatment: In the pretreatment process of mixing and mixing organic solvent waste, an oxidation promoter equivalent to 5% of the weight of organic solvent waste is added, and a heavy metal ion stabilizer equivalent to 1.2% of the weight of organic solven...

Embodiment 3

[0067] In this embodiment, a certain hazardous waste disposal company warehouse number category HW12 solid dye coating waste is selected. Laboratory sampling test: pH value 5~7.5, moisture 19.6~40.3%, ignition loss 68.93~92.04%, SiO 2 3.76~10.83%, Al 2 O 3 0.98~3.07%, Fe 2 O 3 0.94~3.86%, CaO 1.84~9.83%, MgO 0.11~0.32%, K 2 O 0.08~0.32%, Na 2 O 0.13~0.64%, Cl 0.12~0.86%, S 0.03~0.27%, F 0.00~0.04%, low calorific value 1203~2736 Kcal / Kg.

[0068] The oxidation promoter used in this example is potassium ferrate, benzoic acid, and cerium nitrate, wherein the mass ratio of potassium ferrate, benzoic acid, and cerium nitrate is 1:4:5; the stabilizer is potassium silicate, sodium metaaluminate, and The mass ratio of potassium silicate to sodium metaaluminate is 1:1.6.

[0069] This embodiment is carried out as follows:

[0070] (1) Modification treatment: In the process of crushing, rolling and mixing of solid dye coating waste, an oxidation promoter equivalent to 4% of the mass of soli...

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Abstract

The invention discloses a method for preparing mixed fuel by cooperatively treating organic matter-containing hazardous waste in a cement plant. The method comprises the following steps: (1) carryingout modification treatment; (2) preparing mixed fuel powder; and (3) spraying into a kiln for combustion. The method is simple in process and low in investment, material components of hazardous wasteare modified, volatile peculiar smells are eliminated, pollutants such as heavy metal are stabilized, the pollutants such as peculiar smells generated in the drying and grinding process are eliminatedthrough the natural adsorption performance of pulverized coal, and secondary pollution is avoided in the treatment process; organic matter-containing hazardous waste is modified to serve as a combustion promoting component (namely a combustion improver) and alternative fuel of cement plant fire coal, mixed powder is ground into mixed fuel powder, clean combustion of the organic matter-containinghazardous waste and clean combustion of kiln-entering pulverized coal are facilitated, the fire coal can be effectively saved, environmental protection is facilitated, and sustainable development of green, low-carbon and circular economy is facilitated.

Description

Technical field [0001] The invention relates to a method for recycling and utilization of hazardous waste containing organic matter, in particular to a method for preparing mixed fuel by co-processing the hazardous waste containing organic matter by a cement plant. Background technique [0002] my country’s hazardous wastes are characterized by a large amount of production, a variety of types, and a wide range of sources. The "National Directory of Hazardous Wastes" (2016 Edition) divides hazardous wastes into 46 categories, with a total of 479 types, of which carbon-containing organic hazardous waste accounts for A lot of proportion. In the past 20 years, my country has formed three major types of disposal technologies, mainly incineration disposal technology, solidification and stabilization technology, and cement kiln co-processing. At present, the co-processing of hazardous waste in cement kilns has become one of the most important and effective technical approaches. [0003] ...

Claims

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Application Information

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IPC IPC(8): C10L5/48C10L5/02C10L5/08
CPCC10L5/48C10L5/02C10L5/08
Inventor 尹小林余智英宋剑飞
Owner 长沙紫宸科技开发有限公司
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