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Sludge resource utilization processing system and method

A treatment system and treatment method technology, applied in the field of environmental protection, can solve the problems of increased cost input, underutilized, less further research on semi-coke, etc., and achieve the effect of reducing treatment costs.

Inactive Publication Date: 2019-08-06
DALIAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, there are many studies on sludge pyrolysis technology for pyrolysis oil and then pyrolysis gas in pyrolysis products, but there are few further studies on semi-coke.
Moreover, most of the sludge semi-coke is waste and has not been fully utilized. At the same time, the sludge pyrolysis technology needs to dehydrate the sludge before pyrolyzing the sludge. In the prior art, the sludge is dehydrated to produce The waste water is sent to the waste water plant for sewage treatment operation, which increases the cost input

Method used

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  • Sludge resource utilization processing system and method
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  • Sludge resource utilization processing system and method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0071] Step 1. Preliminary dehydration: first pump the sludge with a moisture content of 90%-99% into the sludge conditioning tank, and add ferric chloride while stirring, preferably in a liquid state, and the dosage is 10% of the mass of the sludge, after 25 minutes of reaction, add polymeric organic flocculant polyacrylamide (PAM) for a further 20 minutes of reaction, PAM is 5% of the total mass of the sludge, to destroy the floc structure in the sludge, conditioning The final sludge is sequentially pumped into the mixing equipment and tableting equipment, and pressed into cakes in the tableting equipment;

[0072] Step 2. Ultrasonic dehydration: send the cake-like sludge in the above step 1 to the ultrasonic treatment device through the conveyor belt. The sludge after ultrasonic treatment is further dehydrated by the dehydration equipment, and the dewatered wastewater is discharged into the sewage treatment tank. The dehydrated sewage Mud enters the later stage of resource ...

Embodiment 2

[0079] Ultrasonic dehydration: the ultrasonic frequency of the ultrasonic treatment device is 80kHz, the ultrasonic sound energy density is controlled at 0.5w / g, and the processing time of the ultrasonic device is 15 minutes;

[0080] Sludge pyrolysis semi-coke: first, heat the pyrolysis furnace reactor to the set temperature, and set the final pyrolysis temperature to 600°C. When the pyrolysis furnace reaches the set temperature, the sludge treated in step 3 is fed through a screw, and the residence time of the sludge in the pyrolysis furnace is 50 minutes respectively to obtain pyrolysis gas and sludge pyrolysis carbon;

[0081] The sludge concentration after the step 4 treatment is 10mol / L ZnCl 2 Impregnate according to the mass ratio of 2:1, filter after impregnating for 15 hours, put the filtered sludge semi-coke into an oven at 105°C, dry to constant weight, and then perform anaerobic activation in a high-temperature reaction kettle, the activation temperature is respect...

Embodiment 3

[0085] Preliminary dehydration: first pump the sludge with a moisture content of 90%-99% into the sludge conditioning tank, and add quicklime while stirring, and the adding method can be solid or liquid;

[0086] Ultrasonic dehydration: the ultrasonic frequency of the ultrasonic treatment device is 20KHz, the ultrasonic sound energy density is controlled at 1.0w / g, and the processing time of the ultrasonic device is 20 minutes;

[0087] Sludge pyrolysis semi-coke: first, heat the pyrolysis furnace reactor to the set temperature, and set the final pyrolysis temperature to 400°C. When the pyrolysis furnace reaches the set temperature, the sludge treated in step 3 is fed through a screw, and the residence time of the sludge in the pyrolysis furnace is 1 hour respectively to obtain pyrolysis gas and sludge pyrolysis carbon;

[0088] The sludge concentration after described step 4 treatment is the ZnCl of 4mol / L 2 Impregnate according to the mass ratio of 2:1, filter after impregn...

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Abstract

The invention belongs to the technical field of environment protection, and discloses a sludge resource utilization processing system. The sludge resource utilization processing system comprises a preliminary dehydration unit, an ultrasonic wave dehydration unit, a drying unit, a sludge pyrolysis unit, a gas liquid separation unit, a sludge activation unit, and an acid pickling unit. The method isused for resource utilization of sludge, and activation study on sludge semi-coke generated in sludge processing; activation process is adopted to prepare sludge semi-coke into sludge activated carbon which can be used in the field of sludge processing; and at the same time, the sludge activated carbon obtained through resource utilization is adopted to process sewage generated in sludge dehydration, so that a sludge and sewage processing virtuous circulation system is formed in sludge processing factories, and processing cost is reduced.

Description

technical field [0001] The invention relates to the technical field of environmental protection, in particular to a sludge resource utilization treatment system and method. Background technique [0002] At present, with the advancement of urbanization, the treatment and disposal of urban sewage plant sludge has gone through a relatively short period of time from direct landfill, sludge organic fertilizer resource utilization to various reduction technologies and incineration technologies. , showing the phenomenon of a hundred schools of thought contending and a hundred flowers blooming. Sludge pyrolysis technology is a kind of sludge heat treatment technology that has developed rapidly in recent years. It uses temperature driving force to make dehydrated and dried sludge The organic matter in the sludge is converted into pyrolysis oil, combustible gas, and sludge semi-coke, a solid product with multiple uses. Sludge pyrolysis technology has many advantages such as reducing ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F11/00C02F11/121C02F11/14C02F11/15C02F11/13C02F11/10C10B53/00C10B57/00
CPCC02F11/00C02F11/14C02F11/15C02F11/13C02F11/10C10B53/00C10B57/005Y02W10/40
Inventor 王帆
Owner DALIAN UNIV
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