A comprehensive treatment process for urban sewage plant sludge
A comprehensive treatment and urban sewage technology, applied in the direction of sludge treatment, dehydration/drying/thickened sludge treatment, water/sludge/sewage treatment, etc., can solve the problems of sedimentation and organic pollution, and achieve the reduction of sludge volume, Improve the solubility of solid alkali and reduce the effect of production
Active Publication Date: 2022-01-18
浙江起航环境集团有限公司
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Problems solved by technology
Composting can achieve volume reduction and stabilization of sludge, but due to the deposition of heavy metals and organic pollution in sludge, this method must be used with caution
Method used
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[0026] The following are specific embodiments of the present invention, and in conjunction with the accompanying drawings, further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.
[0027] A comprehensive treatment process for urban sewage plant sludge, such as figure 1 shown, including the following steps:
[0028] (1) Send the sludge to the filter press device 1 for dehydration to obtain dewatered water and dehydrated sludge;
[0029] (2) Send the dewatered sludge to the incineration device 2 for incineration, the flue gas generated by the incineration is sent to the flue gas purification device and then emptied, and the waste residue generated by the incineration is sent to the building material sintering device 3; the flue gas purification device includes liquid nitrogen denitrification in turn Unit 4, rapid cooling and deacidification unit 5, bag dust removal unit 6, wet washing unit 7 and temperatur...
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The invention relates to the technical field of sludge treatment, in particular to a comprehensive sludge treatment process in urban sewage plants. It includes the following steps: (1) send the sludge into the filter press device for dehydration to obtain dewatered water and dehydrated sludge; (2) send the dehydrated sludge into the incineration device for incineration, and send the flue gas generated by the incineration into the flue gas purification After the device is emptied, the waste residue produced by incineration is sent to the building material sintering device; the flue gas purification device includes a liquid nitrogen denitrification unit, a rapid cooling deacidification unit, a bag dust removal unit, a wet washing unit and a temperature raising unit; The water is sent to the steam generator, and the steam generated is sent to the temperature raising unit. The steam is converted into condensed water after heat exchange, and the condensed water is sent to the wet washing unit; the residual scale left by the steam generator is sent to the building material sintering device. The invention has the characteristics of good sludge treatment effect, energy saving, environmental protection and low cost.
Description
technical field [0001] The invention relates to the technical field of sludge treatment, in particular to a comprehensive sludge treatment process in urban sewage plants. Background technique [0002] All municipalities must build sewage treatment facilities. In the eyes of many people, as long as a city sets up a sewage treatment plant, the city's water supply and environmental protection problems have been solved. The fact is that urban sewage treatment plants will inevitably produce sludge in the process of sewage treatment. And with the continuous improvement of urban sewage treatment rate, the output of sludge is also increasing. At present, the total annual sludge production in the country reaches 9 million tons, not including the large amount of sludge with extremely high water content produced by urban pipeline dredging and river dredging. At present, the standardized disposal rate of sludge from sewage treatment plants in the country is less than 20%, and the pro...
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IPC IPC(8): C02F11/122C02F11/13B01D53/75B01D53/78B01D53/56B01D53/40B01D53/18B01D50/00F23G7/00
CPCC02F11/122C02F11/13B01D53/75B01D53/78B01D53/56B01D53/40B01D53/18B01D53/185F23G7/001B01D2251/20B01D2258/0283B01D50/60
Inventor 黄波程伟
Owner 浙江起航环境集团有限公司