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Mechanical vapor recompression heat pump mvr sludge drying system

A technology of sludge drying and mechanical steam, applied in the direction of dewatering/drying/concentrating sludge treatment, etc., can solve the problems of high investment cost and complicated additional equipment, achieve stable system operation, save primary energy, and eliminate steam superheat. Effect

Active Publication Date: 2015-09-30
TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a process of net energy expenditure, the traditional sludge drying process often directly uses primary energy, or uses boiler flue gas waste heat, or even directly uses electric heating to dry. / t of water requires complex additional equipment and high investment costs

Method used

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  • Mechanical vapor recompression heat pump mvr sludge drying system
  • Mechanical vapor recompression heat pump mvr sludge drying system
  • Mechanical vapor recompression heat pump mvr sludge drying system

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Embodiment Construction

[0053] The specific implementation manner of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0054] Such as figure 1 The sludge drying system using MVR technology shown mainly includes a water vapor compressor system, a hollow paddle dryer, and a secondary steam separator, steam compensation water tank and condensation Water tank 25.

[0055] Such as figure 2 Shown, described water vapor compressor system mainly is made up of water vapor compressor, but preferred single-screw water vapor compressor 17 also includes shock absorber 15, driving motor 23 and compressor cooling water system; The upper part of the body of machine 17 is provided with secondary steam inlet 18 and is provided with recompression steam outlet 16 at the bottom of the compressor body, and rubber shock absorber 15 is also arranged at the bottom of the body; Further reduce mechanical vibration during operation. The single-screw water vapor compres...

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Abstract

The invention relates to the field of dry recycle systems, and concretely relates to an MVR heat pump sludge drying system. The MVR heat pump sludge drying system comprises a hollow blade type drying machine and a vapor compressor; wet sludge is dried by the hollow blade type drying machine to generate secondary vapor, and the secondary vapor enters the vapor compressor and is compressed to become recompressed vapor; and the recompressed vapor flows back into the hollow blade type drying machine. All latent heat of the secondary vapor generated in the sludge drying process can be recovered by the MVR heat pump sludge drying system, and can be used as a sludge recompression vapor heat source, so energy is saved, and energy consumed for the sludge drying is substantially reduced, and the pollution is avoided; and the system has the advantages of stable running, reduction of the energy loss in the operation, and increase of the work efficiency.

Description

technical field [0001] The invention relates to the field of sludge drying recovery treatment system, in particular to a mechanical vapor recompression heat pump MVR sludge drying system. Background technique [0002] With the increasingly serious problem of urban environmental pollution, the treatment and disposal of sewage and sludge as the main content of urban pollution control has gradually received more and more attention. During the "Eleventh Five-Year Plan" period, the national urban sewage treatment capacity reached 1.0×108m 3 / d, the annual sewage treatment capacity reaches 3.0×10 10 m 3 , the sludge output will reach 3.0×10 7 t (80% moisture content). With the increase of sewage treatment rate and treatment depth, sludge discharge is increasing at a rate of more than 10-15% per year, but supporting sludge treatment and disposal has not made great progress. Due to technical and policy reasons, most domestic urban sewage sludge is disposed of by landfill withou...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F11/12
Inventor 杨鲁伟林文野张振涛庞卫科
Owner TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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