Energy-saving sludge drying device by utilizing recovery waste heat of vapor compression
A technology of compression recovery and sludge drying, which is applied in the direction of dehydration/drying/thickened sludge treatment, etc., to achieve the effect of saving energy, not wasting energy, and saving floor space
Inactive Publication Date: 2014-04-09
TONGJI UNIV
View PDF5 Cites 14 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
To solve the problem of recycling low-grade energy such as hot and humid steam generated during the sludge drying process, reducing the consumption of high-grade energy and improving energy utilization efficiency
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 moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
specific Embodiment 1
[0026] Specific Example 1: Operation process of an energy-saving sludge drying device for recovery of waste heat by vapor compression
[0027] Such as figure 1 As shown, the main body of the device is mainly composed of a steam compressor 1, a three-way valve 2, a heat exchanger 3, and a sludge dryer. Among them, the sludge drying machine is composed of a motor 4 , a screw agitating sludge preheater 5 , a sludge conveyor belt 6 and a blower 7 . In addition, the three-way valve 2 has a first-way valve pipeline 2-1, a second-way valve pipeline 2-2, and a third-way valve pipeline 2-3, and the heat exchanger 3 has pipelines for the first heat exchange pipeline 3-1, pipeline 3-2 of the second heat exchanger, pipeline 3-3 of the third heat exchanger and pipeline 3-4 of the fourth heat exchanger, there are pipelines on the spiral stirring sludge preheater Non-condensable gas outlet 5-1, condensed water outlet 5-2, hot air inlet 5-3.
[0028]During the operation of the device, the ...
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
Login to View More Abstract
The invention relates to an energy-saving sludge drying device by utilizing recovery waste heat of vapor compression. The device comprises a vapor compression machine, a three-way valve, a heat exchanger and a sludge drying machine, wherein wet and cold sludge enters the sludge drying machine and is preheated and dried by utilizing the high temperature and high pressure gas which is produced by the vapor compression machine and introduced into a hollow tube of a spiral stirring sludge preheating machine; meanwhile, a part of dry and cold air introduced from the bottom of the sludge drying machine enters the heat exchanger to exchange heat with the high temperature gas produced by the vapor compression machine, the produced dry and hot air enters the sludge drying system to further take away the vapor of the wet and hot sludge on multiple conveyor belts; the other part of the dry and cold air is directly used for recovering the surplus heat of the sludge drying. The device disclosed by the invention has the advantages that the energy consumption can be effectively reduced; the system is of vertical type, so that the floor space is small; the quantity of the conveyor belts in the sludge drying system can be multiple, so that the drying efficiency is greatly improved; the stabilization, the reduction, the harmlessness and the recycling of the dried sludge are realized. The device disclosed by the invention is simple in equipment, little in initial investment, low in energy consumption and operating cost and good in sludge drying treatment effect.
Description
technical field [0001] The invention belongs to the technical field of sludge drying, and in particular relates to an energy-saving sludge drying device for recovering waste heat through vapor compression. Background technique [0002] With economic development, population growth, accelerated urbanization, and increased sewage treatment rates, the amount of municipal sludge produced is also increasing. However, my country's sludge treatment technology and equipment are generally backward, and the safety of sludge treatment and disposal is limited. The guarantee rate is very low, which has become an urgent problem facing our country. [0003] Sludge drying is a treatment method for deep dehydration of sludge with a heat source. It can significantly reduce the volume of sludge, and the volume can be reduced by 4-5 times. The product is stable, odorless, and free of pathogenic organisms. The sludge after drying treatment The product has many uses and can be used as fertilizer, ...
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
Login to View More Patent Type & Authority Applications(China)
IPC IPC(8): C02F11/12
Inventor 吴志根孙文鸽王刚李卓
Owner TONGJI UNIV