Method and apparatus for controlling secondary pollutants in biodrying of mixed domestic waste

A technology of biological drying and domestic waste, applied in the direction of solid waste removal, etc., can solve the problems of restricting the application of biological drying technology, conflicts among residents around the facilities, and difficulties in landing, so as to save investment costs, reduce processing capacity, and improve drying. efficiency effect

Inactive Publication Date: 2012-02-22
CHINA URBAN CONSTR DESIGN & RES INST CO LTD
View PDF5 Cites 31 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Nevertheless, the existing domestic waste biological drying technology treatment cycle generally exceeds 15 days (Zhang D.Q., et al, Biodrying of municipal solid waste with high water content by aeration procedures regulation and inoculation, Bioresource Technology, 2008, 99: 8796 -8802), at the same time, odorous tail gas will be released during the treatment process, which will cause serious secondary pollution, easily cause conflicts with residents around the facility, and limit the application of biological drying technology
[0009] The secondary pollutants in the biological drying process mainly include leachate and drying tail gas, especially the tail gas with a large amount of malodorous gas, which is one of the main factors restricting the development of waste biological drying technology. If these factors are not controlled , it is easy to form relatively serious secondary pollution, and it is easy to cause conflicts with residents around the facility, which makes the implementation of this technology difficult.

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 and apparatus for controlling secondary pollutants in biodrying of mixed domestic waste
  • Method and apparatus for controlling secondary pollutants in biodrying of mixed domestic waste
  • Method and apparatus for controlling secondary pollutants in biodrying of mixed domestic waste

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] The domestic garbage treatment capacity of the present embodiment is 400t / d: the initial moisture content of garbage is 61%-65%, the mass fraction of food waste in garbage is 63%, paper 15%, plastic 10%, other (inorganic wastes such as glass and ash) matter) 12%, and the mass fraction of degradable organic matter in the dry matter is 40%.

[0042] After the domestic waste is broken into bags and large debris and metals are selected, the remaining daily processing capacity is about 380t, and the density is 400kg / m 3 , using a trough-type composting reactor with a width of 4.5m and a stacking height of 1.8m. The daily processing capacity requires a trough length of 120m. There are 10 parallel composting reactors in the plant, each of which processes a day's worth of garbage and is used for turnover. According to the ventilation volume is 1m 3 / min·m 3 Considering the volume, each reactor is equipped with a centrifugal blower and a control system, and its parameter is a ...

Embodiment 2

[0051] Such as figure 1 As shown, a garbage treatment device for recycling biologically dried secondary pollutants includes a sealed reactor 1, a leachate collector 4, a ventilation system and an exhaust gas processor. A tail gas discharge port is provided on the sealed reactor 1, a spray pipe 5 is fixedly installed in the upper part, and a porous support plate 16 and a leachate collecting pipe 15 are fixedly installed in the lower part. The leachate collector 4 is connected to the leachate collection pipe 15 and the spray pipe 5 through pipelines respectively, and a submersible sewage pump is installed in the leachate collector to connect the spray pipe to realize back-spraying. The ventilation system includes a ventilation pipeline 3 and a ventilation fan 8, and the ventilation pipeline 3 is fixedly installed under the porous support plate 16 in the sealed reactor 1, and passes through the side wall of the sealed reactor 1 and is connected to the air outlet of the ventilatio...

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 and apparatus for controlling secondary pollutants in biodrying of mixed domestic waste. The method comprises the following steps: (1) simple pretreatment; (2) stacking; (3) biodrying of waste; (4) back spraying of leachate; (5) drying, reflux and concentrated treatment of tail gas. The apparatus comprises a sealed reactor, a leachate collector, a ventilating system and a tail gas treating device, wherein, the leachate collector is respectively connected with a leachate collecting pipe and a spray pipe in the reactor through pipelines, the tail gas treating device comprises a tail gas recovering pipe, a drying box, a tail gas treating fan and a purifying means, the tail gas recovering pipe is connected with the drying box, the drying box is respectively connected with a ventilating fan and the tail gas treating fan, and the tail gas treating fan is connected with the purifying means through a pipeline. According to the invention, the leachate does not need to be treated individually; tail gas is collected in a totally enclosed environment, and the amount of tail gas to be treated is small; a low heating value of obtained dried waste is increased by 100%; the invention is widely applicable to mixed waste with high water content and enables resource values of burning and sorting of domestic waste to be improved.

Description

technical field [0001] The invention relates to a treatment method and device for domestic garbage, in particular to a method and device for controlling secondary pollutants from biological drying of mixed domestic garbage. Background technique [0002] Domestic waste can generally be divided into four categories: recyclable waste, kitchen waste, hazardous waste and other waste. The current treatment methods for domestic waste are usually landfill, incineration or composting. [0003] At present, the municipal solid waste in our country generally adopts the method of mixed collection. Among them, the water content of easily degradable organic waste such as kitchen waste is relatively high, usually around 50%, and even 70% in some areas. If this kind of mixed waste with high water content is directly landfilled, it will not only occupy a large amount of land area, but also produce a large amount of leachate and biogas during the landfill process. The treatment of leachate i...

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): B09B3/00B09B5/00
Inventor 黄文雄徐文龙徐海云屈志云袁松
Owner CHINA URBAN CONSTR DESIGN & RES INST 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

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