Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Sludge drying system and method based on carbon dioxide stepped series circulating high-temperature heat pump

A carbon dioxide and sludge drying technology, which is applied in chemical instruments and methods, heat pumps, sludge treatment, etc., can solve problems such as poor operating conditions, large air circulation, and slow drying speed, so as to improve efficiency, Improve system performance and avoid system performance degradation

Pending Publication Date: 2022-01-14
CHINA THREE GORGES CORPORATION +1
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Patent CN210176712U proposes a carbon dioxide air source heat pump drying system for urban sludge in the northern region. With the help of the low temperature characteristics of carbon dioxide working medium, it is used as a cold medium to overcome the problem of poor operating conditions of traditional air source heat pumps in winter
However, if the heat pump using carbon dioxide as the working fluid adopts the low-temperature drying technology, there will be problems such as slow drying speed, large air flow rate and high energy consumption of the fan.

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
  • Sludge drying system and method based on carbon dioxide stepped series circulating high-temperature heat pump
  • Sludge drying system and method based on carbon dioxide stepped series circulating high-temperature heat pump
  • Sludge drying system and method based on carbon dioxide stepped series circulating high-temperature heat pump

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] see Figure 1-6 , a sludge drying system based on a carbon dioxide cascaded series cycle high-temperature heat pump, which includes a sludge drying process system for drying sludge; the sludge drying process system is connected in series with a carbon dioxide cascade system for providing heat The circulation high-temperature heat pump system 30 is connected; the carbon dioxide cascaded series circulation high-temperature heat pump system 30 is connected with the clean power system 40 and the air quality energy circulation process system.

[0041] Further, the sludge drying system includes a drying pretreatment system 10 and an expansion type flash drying system 20; the drying pretreatment system 10 includes a sedimentation tank 12, and the sedimentation tank 12 is connected to a gravity concentration tank 11, The gravity concentration tank 11 is connected with the horizontal centrifugal drying device 13; the expansion type flash drying system 20 includes a low-temperatu...

Embodiment 2

[0047] see figure 2 , the sludge drying system consists of two parts: a drying pretreatment system 10 and a capacity-expanding flash drying system 20, wherein the drying pretreatment system 10 consists of a gravity concentration tank 11, a sedimentation tank 12, and a horizontal centrifugal drying system. The device 13 is composed of three main parts. During the implementation process, the raw sludge is separated from the gravity concentration tank 11 successively in the sedimentation tank 12, and the centrifugal separation and preheating process of the horizontal centrifugal drying device 13 treats the sludge to 80% water content. The left and right temperature is about 40°C. The specific implementation method is: the raw sludge and sewage mixture in the sedimentation tank 12 are separated by standing to form the upper sewage layer 12a and the saturated sludge layer 12b, and the circulating waterway inlet and outlet 12f of the upper sewage layer 12a of the sedimentation tank ...

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 sludge drying system and method based on a carbon dioxide stepped series circulating high-temperature heat pump. The sludge drying system comprises a sludge drying process system for drying sludge; the sludge drying process system is connected with a carbon dioxide stepped series circulating high-temperature heat pump system for providing a heat source; and the carbon dioxide stepped series circulating high-temperature heat pump system is connected with a clean electric power system and an air mass energy circulation process system. According to the system, a three-stage stepped series circulating high-temperature heat pump is adopted to provide a 130-DEG C heat source to dry sludge, and heat is recycled as a low-temperature heat source of the heat pump. In addition, the system adopts medium-temperature drying, ammonia in the sludge is separated, the total nitrogen amount of the sludge as a fuel product is reduced, and the economic benefit is improved by collecting ammonia water.

Description

technical field [0001] The invention relates to the technical field of sludge treatment, in particular to a sludge drying system and method based on a carbon dioxide cascaded series cycle high-temperature heat pump. Background technique [0002] Sludge disposal is the terminal process of urban centralized sewage treatment. Raw sludge contains a large amount of organic matter. Direct stacking and disposal will not only cause hidden dangers of natural water pollution due to water seepage, but also cause pollutant discharge and explosion during the natural fermentation process of organic matter. harm. With the increasing shortage of natural resources and the gradual popularization of the concept of environmental protection, the technology of sludge recycling and harmless treatment has developed rapidly. Sludge drying is an important part of sludge disposal. At present, the back-end disposal of sludge is generally charged by ton. The dehydration treatment of sludge can greatly ...

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): C02F11/13C02F11/121C02F11/127F25B30/02F25B30/06
CPCC02F11/13C02F11/121C02F11/127F25B30/02F25B30/06
Inventor 蔺新星尹立坤王先恺谢宁宁苏文
Owner CHINA THREE GORGES CORPORATION
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com