Method for applying sludge heat drying and sludge digestion fermentation in combining way

A combined application, sludge technology, applied in the field of environmental protection and pollutant treatment, can solve the problems of lack of connection, high transportation cost, low porosity, etc., and achieve the effect of saving energy

Inactive Publication Date: 2010-01-20
CHINA METALLURGICAL ENG CO LTD
View PDF0 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] 2. Agricultural method: This method is relatively stable and hygienic. It can convert part of the organic matter in the sludge into soil modifier components, and has a certain repairing effect on land reclamation, but it still has certain limitations.
One is poor degradability, high water content and low porosity, so a large amount of treatment chemicals need to be added
Heavy metal pollution exists in the sludge of many sewage plants, and seepage of heavy metals, pathogens, refractory organic matter and N, P in the sludge pollutes surface and groundwater
Second, the transportation costs required are relatively high
Due to the small amount of biogas produced, it is difficult to realize economically valuable biogas utilization
[0014] In summary, sludge drying is a method of sludge treatment, which is widely used at home and abroad. The sludge after drying treatment has good stability and no odor; the volume and weight are greatly reduced and easy to transport; after high temperature treatment The sludge sterilization degree is high; however, the sludge drying and sludge biogas processes are two independent processes, there is no connection between them, and the energy has not been used multiple times and effectively

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
  • Method for applying sludge heat drying and sludge digestion fermentation in combining way

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0027] The technical solutions of the present invention will be further described below in combination with specific embodiments.

[0028] The sludge thermal drying system is mainly composed of a thermal oil heating furnace, a heat exchanger and a fluidized bed; the sludge digestion and fermentation system is mainly composed of a biogas tank, between the sludge thermal drying system and the sludge digestion and fermentation system, Set up a condensing heat exchanger, the condensing heat exchanger is divided into a high temperature end and a low temperature end, the condensing heat exchanger is provided with a pair of gas inlet and outlet, connected with the fluidized bed gas inlet and outlet; a digestive system liquid inlet; System liquid outlet, connected with biogas tank;

[0029] Wherein, if the sludge thermal drying system is composed of a thermal oil heating furnace, a heat exchanger and a non-fluidized bed drying system, the exhaust port at the hot end of the condensing ...

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 relates to a method for applying sludge heat drying and sludge digestion fermentation in a combining way; a condensing-type heat exchanger is arranged between a sludge heat drying system and a sludge digestion fermentation system and is divided into a high temperature end and a low temperature end, wherein the high temperature end is connected with the sludge heat drying system, and the low temperature end is connected with the sludge digestion fermentation system; when in the process of sludge heat drying, high temperature steam or high humidity gas generated by the sludge heat drying system enters into the high temperature end of the condensing-type heat exchanger for heat exchange, the temperature of the gas is reduced to be 40-50 DEG C, and the moisture in the gas is condensed to form condensate water; liquid in a digestion system at the low temperature end of the condensing-type heat exchanger is heated, and the heating temperature is more than 35 DEG C; the liquid is then transmitted into the sludge digestion fermentation system connected with the condensing-type heat exchanger and used for supplying the heat needed in the process of sludge digestion fermentation; the sludge digestion fermentation system is connected with the sludge heat drying system by a pipeline, so that methane generated by the sludge digestion fermentation system is input into the sludge heat drying system to be taken as fuel for heating sludge.

Description

Technical field: [0001] The invention relates to a combined application method of thermal drying of sludge and sludge digestion and fermentation, which uses the heat energy of high-temperature steam or high-temperature and high-humidity gas generated in the process of drying urban sludge to heat the sludge digestion and fermentation system technology, thereby replacing the role of the heating system in biogas production, saving the daily heat energy consumption of the system and reducing operating costs. The invention belongs to the technical field of environmental protection and pollutant treatment. Background technique: [0002] With the rapid development of my country's national economy, the continuous acceleration of urbanization and the increasing public demand for environmental quality, a large number of urban sewage treatment plants across the country have been built and put into operation, facing the problem of how to deal with the large amount of surplus sludge gene...

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 Applications(China)
IPC IPC(8): C02F11/12C02F11/04
CPCY02E50/343Y02E50/30
Inventor 刘犇
Owner CHINA METALLURGICAL ENG CO LTD
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