Clean energy utilization method for municipal solid wastes

A technology of municipal solid waste and clean energy, which is applied in the field of clean energy utilization of municipal solid waste, and can solve problems such as difficulty in realizing resource utilization and energy utilization value, difficulty in realizing economic benefits of process technology, and poor quality of coke produced by pyrolysis and carbonization , to achieve high value-added utilization, avoid generation and diffusion, and achieve good economic benefits

Inactive Publication Date: 2010-09-15
SHOUGANG CORPORATION
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

Such patented technologies all suffer from pyrolysis (dry distillation) products of coke, tar, and gas with low calorific value, which makes it difficult to achieve further resource utilization and energy utilization value, making it difficult to popularize and apply the process technology
[0011] At present, the existing municipal waste pyrolysis carbonization technology mainly has shortcomings in the following aspects: (1) It is necessary to build a new pyrolysis carbonization equipment system and a secondary processing system for pyrolysis carbonization products, the equipment system is complex, and the initial investment and operating costs are relatively high High, difficult to achieve large-scale production
(2) Most of the garbage is treated by pyrolysis and carbonization alone. The quality of pyrolysis and carbonization products such as coke, tar and gas is poor, and it is difficult to realize the economic benefits of the process technology, which hinders the popularization and application of this type of technology

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0031] Take municipal solid waste on a 15mm sieve, and recover magnetic substances through magnetic separation. Crushed to 20mm, and dried with a drum, the moisture content of the dried garbage was detected to be 8.3%. Coal powder is selected from Shenhua coal with a moisture content of 13.4%. According to the total amount of 2kg on a dry basis, the proportion of municipal solid waste added is 70% for batching, mix evenly, heat and compact the mixed material to a density of 400kg / m 3 Left and right, into the 2kg small coke oven experimental device. Keep the temperature in the center of the furnace at 100°C for 5 minutes, then continue to increase the temperature, and turn off the heating system when the temperature in the center of the furnace reaches 960°C for 2 minutes. The product yield is 68.0% of coke, 13.6% of tar, and 18.4% of gas, of which the calorific value of semi-coke is 12420KJ / Kg, and the calorific value of gas is 13349KJ / m 3 .

Embodiment 2

[0033] Take municipal solid waste on a 15mm sieve, and recover magnetic substances through magnetic separation. Crushed to 20mm, and dried with a drum, the moisture content of the dried garbage was detected to be 8.3%. Coal powder is selected from Shenhua coal with a moisture content of 13.4%. According to the total amount of 2kg on a dry basis, the proportion of municipal solid waste added is 50% for batching, mix evenly, heat and compact the mixed material to a density of 400kg / m 3 Left and right, into the 2kg small coke oven experimental device. Keep the temperature in the center of the furnace at 100°C for 5 minutes, then continue to increase the temperature, and turn off the heating system when the temperature in the center of the furnace reaches 960°C for 2 minutes. The product yield is 70.0% of coke, 10.2% of tar, and 19.8% of gas, of which the calorific value of semi-coke is 16240KJ / Kg, and the calorific value of gas is 11698KJ / m 3 .

Embodiment 3

[0035] Take municipal solid waste on a 15mm sieve, and recover magnetic substances through magnetic separation. Crushed to 20mm, and dried with a drum, the moisture content of the dried garbage was detected to be 8.3%. Coal powder is selected from Shenhua coal with a moisture content of 13.4%. According to the total amount of 2kg on a dry basis, the proportion of municipal solid waste added is 30% for batching, mix evenly, heat and compact the mixed material to a density of 400kg / m 3 Left and right, into the 2kg small coke oven experimental device. Keep the temperature in the center of the furnace at 100°C for 5 minutes, then continue to increase the temperature, and turn off the heating system when the temperature in the center of the furnace reaches 960°C for 2 minutes. The product yield is 68.8% of coke, 4.4% of tar, and 26.8% of gas, of which the calorific value of semi-coke is 22720KJ / Kg, and the calorific value of gas is 13231KJ / m 3 .

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Abstract

The invention relates to a clean energy utilization method for municipal solid wastes, belonging to the technical field of municipal solid waste treatment and utilization. The process comprises the following steps of: crushing municipal solid wastes and then mixing the municipal solid wastes with coal, wherein the weight ratio of the municipal solid wastes is 20-70 percent; then carrying out heat melting moulding processing to prepare blocks; and carrying out high-temperature pyrolytic carbonization under the airtight, high-temperature and reducing atmosphere by utilizing a coking production facility system, wherein pyrolytic carbonization products are respectively clean high-heat value fuels of solid coke, liquid tar and gas. The invention has the advantages that the municipal solid wastes with complicated components can be treated, complicated municipal waste sorting processes are not needed, the wastes are converted into the high value-added fuels, and meanwhile, the problem of dioxin pollution which is easy to generate in conventional waste energy treatment (the wastes are incinerated to generate electricity) is avoided, thereby having bigger popularization meaning.

Description

technical field [0001] The invention belongs to the technical field of urban living garbage treatment and utilization, and in particular provides a clean energy utilization method of urban living garbage, which is used for high-temperature pyrolysis and carbonization treatment of urban living garbage. technical background [0002] With the development of cities and the continuous growth of population, more and more domestic garbage is produced every day. During the "Tenth Five-Year Plan" period, the volume of domestic garbage removal in my country will reach 158 million tons. In 600 cities across the country, 8 billion tons of various types of garbage have been piled up or landfilled, and two-thirds of the cities are surrounded by garbage. In 2008, Beijing alone produced 6.72 million tons of domestic waste, and it is growing continuously. Municipal domestic waste has become a prominent problem that plagues the sustainable development of the capital. [0003] At present, dom...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09B5/00B09B3/00
Inventor 廖洪强李世青赵鹏刘波余广炜吴朝峰
Owner SHOUGANG CORPORATION
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