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A method of treating sludge using solar pyrolysis carbonization technology

A technical treatment and solar thermal technology, which is applied in the field of sludge treatment using solar pyrolysis carbonization technology, can solve the problems of unrealized sludge reduction, energy consumption, high equipment investment and operation costs, and moisture content that cannot meet the requirements. It is not easy to migrate and be absorbed by plants, and realize the effect of resource utilization

Active Publication Date: 2017-09-19
北京金泥华牛科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These methods either have moisture content that cannot meet the requirements or have shortcomings such as high operating costs or increased sludge capacity, which cannot meet the actual needs.
[0006] Therefore, the current problem of deep sludge dewatering is that the existing sludge treatment technology has complex processes, high energy consumption, equipment investment, and high operating costs, and has not achieved sludge reduction, which easily affects sludge regeneration or Disadvantages such as follow-up use and poor environmental benefits

Method used

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  • A method of treating sludge using solar pyrolysis carbonization technology
  • A method of treating sludge using solar pyrolysis carbonization technology
  • A method of treating sludge using solar pyrolysis carbonization technology

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] Example 1 Surplus sludge with a water content of 99.7% in the sewage treatment plant of Yangdong Economic Development Zone

[0049] Such as figure 2 As shown in , take 40kg of excess sludge with a moisture content of 99.7%, and after dehydration treatment by the sludge dehydration treatment facility, the dehydrated mud cake will directly enter the drying system. The drying time is 130 minutes. The heat source of the drying system is heat The heat generated by the combustion of combustible gas in the tail gas of the decarbonization furnace and the heat of the water vapor generated by itself;

[0050] The dried sludge enters the pyrolysis carbonization furnace (the pyrolysis carbonization furnace sold on the market can be used), the aspirator of the pyrolysis carbonization furnace system is turned on, and when the pressure in the furnace drops to 0MPa, the solar heating system and the N 2 The pressurized system, in which the solar heating system adopts the traditional s...

Embodiment 2

[0053] Example 2 Surplus sludge with a water content of 99.7% in the sewage treatment plant of Yangdong Economic Development Zone

[0054] Such as image 3 As shown, 40kg of excess sludge with a moisture content of 99.7% is drawn directly into the drying system, and the drying time is 130 minutes. the heat of the water vapor produced;

[0055] The dried sludge enters the pyrolysis and carbonization furnace, and the aspirator of the pyrolysis and carbonization furnace system is turned on. When the pressure in the furnace drops to 0MPa, the solar heating system and the N 2 The pressurized system, in which the solar heating system uses the traditional solar energy to convert heat energy, then converts heat energy into electrical energy, and then converts electrical energy into heat energy to supply heat. The temperature is controlled at 330 °C and the pressure is controlled at 12 MPa. A series of reactions including vaporization, pyrolysis, dehydrogenation, thermal shrinkage an...

Embodiment 3

[0058] Example 3 Surplus sludge with a water content of 99.7% in the sewage treatment plant of Yangdong Economic Development Zone

[0059] Such as figure 2 As shown in , extract 40kg of excess sludge with a water content of 99.7%, and pass through the original sludge dehydration treatment system to obtain a mud cake with a water content of 65%. The dehydrated mud cake is put into the drying system, and the drying time is 120 minutes. The heat source of the system is the heat generated by the waste gas of the pyrolysis carbonization furnace and the combustible gas combustion in the tail gas and the heat of the water vapor generated by itself;

[0060] Put the dried sludge into the pyrolysis carbonization furnace, turn on the aspirator of the pyrolysis carbonization furnace system, and when the pressure in the furnace drops to 0MPa, turn on the solar heating system and the N 2 The pressurized system, in which the solar heating system uses traditional solar energy to convert he...

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Abstract

The invention discloses a method for treating sludge by using solar pyrolysis carbonization technology, which comprises the following steps: taking the sludge produced by urban sewage treatment, placing it in a pyrolysis carbonization furnace, and carrying out the sludge treatment in a sealed, oxygen-free and non-combustion state. A series of reactions including vaporization, pyrolysis, dehydrogenation, thermal shrinkage and carbonization, to generate tail gas, biochar and tar, wherein the pyrolysis carbonization furnace is provided with a heat source by a solar heating system, and the reaction conditions are high temperature and normal pressure or high temperature and high pressure or Medium-high temperature and high pressure, the high temperature is 500-800°C, the medium-high temperature is 200-400°C, and the high pressure is 1-16MPa. The method of the present invention can realize the thorough treatment and disposal of sludge in the sewage plant, without secondary pollution, high energy utilization rate, extremely low operating cost, recycling of renewable resources, and truly and thoroughly realize the reduction, stabilization, and maintenance of sludge treatment and disposal. Harmless and resource utilization.

Description

technical field [0001] The invention belongs to the technical field of sludge treatment and resource regeneration, and in particular relates to a method for treating sludge by using solar pyrolysis carbonization technology. Background technique [0002] In recent years, China's urban sewage treatment industry has made great progress, and is still in the process of accelerating development. But at the same time, a problem that people did not expect is gradually revealed: a large amount of activated sludge is produced after sewage treatment. According to estimates, the sludge containing 80% water produced in China every day accounts for almost 20% of the total urban waste by weight, and the annual growth rate is greater than 10%. According to forecasts, by 2014, the annual production of dry sludge in the country will reach 25 million tons. Sludge is rich in nutrients, and also contains a large amount of organic matter, heavy metals, pathogenic bacteria, parasites (eggs) and ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F11/10C02F11/12C10B53/00C02F11/13
CPCC02F11/10C10B53/00C10B57/16C02F11/13Y02W10/37Y02P20/133
Inventor 谭修光
Owner 北京金泥华牛科技有限公司
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