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Special CO2 removing deaminizing device and process for sludge digestion biogas slurry

A special device and biogas slurry technology, which is applied in the field of special equipment for CO2 and ammonia removal for sludge digestion and biogas slurry, can solve the problems of complicated process, huge one-time investment cost of equipment, unfavorable large-scale promotion and utilization, etc., and reduce energy consumption cost, meet the effect of green and clean production

Active Publication Date: 2019-01-18
TONGJI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the patented process is complicated, the equipment is various, and the one-time investment cost of the equipment is huge, which is not conducive to large-scale promotion and utilization.

Method used

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  • Special CO2 removing deaminizing device and process for sludge digestion biogas slurry
  • Special CO2 removing deaminizing device and process for sludge digestion biogas slurry
  • Special CO2 removing deaminizing device and process for sludge digestion biogas slurry

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Experimental program
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Effect test

Embodiment

[0041] Send the reflux biogas slurry with high ammonia nitrogen to the CO removal 2 In device 2, make the liquid level of the biogas slurry 2 At 1 / 3 of the height of device 2, the reserved space can increase the CO 2 volatile area. Start the vacuum pump 5 to remove CO 2 The vacuum degree in the device 2 is pumped to -0.08MPa, and then the control valve 8 is opened to introduce the pressure release gas generated during the thermal hydrolysis process of the sludge. A large amount of ammonia contained in the pressure release gas of the thermal hydrolysis will also be absorbed by the biogas slurry. It is dissolved, absorbed and recycled, and the heat carried by the depressurized gas enters the biogas slurry, which is used as a heat source to heat the biogas slurry. Start the circular turntable 4 to stir the biogas slurry, and after the residence time of 10-20 minutes, the CO 2 After the removal operation is over, the pH value of the biogas slurry is around 9.5.

[0042] deCO ...

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Abstract

The invention discloses a special CO2 removing deaminizing device and process for sludge digestion biogas slurry. The device comprises a CO2 removal device, a deaminizing device and a decarbonizing tower, and the CO2 removal device is connected to the deaminizing device through the decarbonizing tower. Solid-liquid separation is carried out on anaerobic digestion biogas slurry to obtain the sludgedigestion biogas slurry and biogas residues, the biogas residues are pyrohydrolyzed to generate pyrohydrolyzing pressure relieving gas, and the sludge digestion biogas slurry is free of CO2 in the CO2 removal device and enters the deaminizing device to remove NH3; the removed CO2 and NH3 are separately pumped by a vacuum pump and enter the decarbonizing tower to generate ammonium hydrogen carbonate. The special device and process remove CO2 and ammonia and nitrogen in the biogas slurry environmentally and harmlessly, and meanwhile achieve resource utilization of CO2 and ammonia and nitrogen.

Description

technical field [0001] The invention belongs to the technical field of sewage sludge treatment, in particular to a method for removing CO from sludge digested biogas slurry 2 Special equipment and process for deamination. Background technique [0002] With the development of urbanization and sewage treatment in China, the output of sludge has reached 43 million tons per year (calculated at a moisture content of 80%), and 40% of nitrogen in sewage is transferred to sludge, so sludge is rich in nitrogen Elements, resource utilization is of great value. Sludge anaerobic digestion converts carbon into methane for recycling, while nitrogen exists in the biogas slurry in the form of ammonia nitrogen. If a large amount of ammonia nitrogen in the biogas slurry is not effectively removed or recovered, the emission reduction target of sewage treatment will be greatly reduced. In addition, biogas slurry mainly comes from the dehydration process of digested sludge, while traditional a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/20
CPCC02F1/20
Inventor 戴晓虎张悦董李鹏杨东海戴翎翎杨殿海李平
Owner TONGJI UNIV
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