Continuous thermal hydrolysis pretreatment process capable of reinforcing high temperature anaerobic fermentation of residual sludge

A technology of high-temperature anaerobic fermentation and excess sludge, applied in biological sludge treatment, sludge treatment through temperature control, etc., can solve the problems of heat consumption and heat loss, and achieve energy saving, processing capacity improvement, and efficiency improvement. Effect

Active Publication Date: 2013-08-28
GUANGXI BOSSCO ENVIRONMENTAL PROTECTION TECH
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the heating process of "thermal hydrolysis-anaerobic digestion" to treat the remaining activated sludge consumes a lot of heat energy. Efficient recovery of heat energy is an important topic of current research

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Continuous thermal hydrolysis pretreatment process capable of reinforcing high temperature anaerobic fermentation of residual sludge

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] After the remaining sludge with a water content of 75% in the urban sewage treatment plant is transported to the preheating tank, it is preheated by the secondary steam from the cyclone separator. The temperature of the sludge after heating is 85 °C; the preheated sludge The screw pump is continuously and quantitatively pumped into the T-shaped pipe through the double-screw meter, and then enters the thermal hydrolysis pipe together with the hot water injected above the T-shaped pipe at a temperature of 80°C to adjust the moisture content of the sludge to 80%. For the sludge in the thermal hydrolysis pipe, multi-point injection of steam with a pressure of 1.0MP and a temperature of 184°C is used for thermal hydrolysis treatment for 60 minutes, and then sprayed into the cyclone separator through the unloader with orifice plate discharge valve In the process, the sludge with a solid content of 11% in the cyclone separator is sent to the high-temperature anaerobic fermentat...

Embodiment 2

[0024] After the remaining sludge with a moisture content of 80% in the urban sewage treatment plant is transported to the preheating tank, it is preheated with the secondary steam from the cyclone separator. The temperature of the sludge after heating is 90 °C; the preheated sludge The double-screw meter is continuously and quantitatively pumped into the T-shaped pipe by the screw pump, and the hot water with a temperature of 82°C is injected into the thermal hydrolysis pipe at a certain ratio above the T-shaped pipe to adjust the moisture content of the sludge to 83%. . For the sludge in the thermal hydrolysis pipe, multi-point injection of steam with a pressure of 1.1MP and a temperature of 186°C is used for thermal hydrolysis treatment for 30 minutes, and then it is sprayed into the cyclone separator through the unloader with an orifice discharge valve In the process, the sludge with a solid content of 10% in the cyclone separator is sent to the high-temperature anaerobic ...

Embodiment 3

[0026] After the excess sludge with a moisture content of 83% in the urban sewage treatment plant is transported to the preheating tank, it is preheated by the secondary steam from the cyclone separator. The temperature of the sludge after heating is 80 ° C; the preheated sludge The screw pump is continuously and quantitatively pumped into the T-shaped pipe through the double-screw meter, and the hot water with a temperature of 78°C is injected into the thermal hydrolysis pipe in a certain proportion with the top of the T-shaped pipe to adjust the moisture content of the sludge to 85%. . For the sludge in the thermal hydrolysis pipe, multi-point injection of steam with a pressure of 0.9MP and a temperature of 182°C is used for thermal hydrolysis treatment for 10 minutes, and then sprayed into the cyclone separator through the unloader with an orifice discharge valve In the process, the sludge with a solid content of 13% in the cyclone separator is sent to the high-temperature ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a continuous thermal hydrolysis pretreatment process capable of reinforcing the high temperature anaerobic fermentation of residual sludge. The method of the invention is characterized in that secondary steam is used for preheating a raw material, the heat steam with pressure of 0.9-1.1MP and the temperature of 182-186 DEG C is used for thermal hydrolysis pretreatment, andthe treated material is placed in a traditional high temperature anaerobic fermentation system for treatment. Compared with the traditional high temperature anaerobic digestion system, the system processing capability of the process of the invention is enhanced by 2-3 times, the gas production of methane can reach 85%, and the high efficiency reuse of the heat steam can realize high quantitative reduction degree of the sludge and circular utilization with high efficiency of the energy.

Description

technical field [0001] The invention relates to the technical field of solid waste treatment, in particular to a continuous thermal hydrolysis pretreatment process capable of strengthening high-temperature anaerobic fermentation of excess sludge. Background technique [0002] In recent years, with the rapid development of my country's economy and the continuous strengthening of the country's environmental pollution control, the efficiency of my country's sewage treatment has been gradually improved. At the same time, a large amount of surplus sludge is generated in the process of sewage treatment to be treated. [0003] The remaining sludge treatment methods mainly include aerobic digestion process and anaerobic digestion process. Among them, aerobic digestion has the disadvantages of high energy consumption and low efficiency; and a large amount of organic matter in sludge can be reduced by anaerobic digestion. volume, destroy pathogenic microorganisms, improve sludge stabi...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Patents(China)
IPC IPC(8): C02F11/18C02F11/04
Inventor 陈楠宋海农吴芹张健覃当麟杨崎峰周钰刘妮
Owner GUANGXI BOSSCO ENVIRONMENTAL PROTECTION TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap