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Sludge heat drying method

A sludge and heating surface technology, applied in chemical instruments and methods, water/sludge/sewage treatment, dehydration/drying/concentrated sludge treatment, etc., can solve the problem of high energy consumption and small processing capacity of a paddle dryer , complex equipment structure and other issues, to achieve the effect of saving heating steam consumption and saturated water vapor condensation energy consumption, increasing device processing capacity, and high device integration

Pending Publication Date: 2021-04-09
湖南长科诚享石化科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the paddle dryer has the disadvantages of high energy consumption, small single processing capacity, and high evaporation temperature, and the heat pump low-temperature drying equipment has the disadvantages of small single processing capacity, micro positive pressure operation, evil spillover, and complex equipment structure.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] use as figure 1 The sludge thermal drying system shown is for sludge thermal drying. The system includes a sludge vacuum dryer 1 and a steam compressor 2. The sludge vacuum dryer 1 is provided with a sealed casing 6; The mud raw material inlet and the saturated steam outlet are provided with a solid slag outlet at the bottom, and a screw conveyor 5 located inside the sealed casing 6 is arranged at the solid slag outlet, as well as a feeding conveyor on the pipeline extending outward from the solid slag outlet. Valve 4; the first conveyor belt, the second conveyor belt and the third conveyor belt are arranged vertically from top to bottom in the sealed housing 6, and the first conveyor belt, the second conveyor belt and the third conveyor belt are slidingly arranged below the first conveyor belt, respectively. The steam heating jacket, the second steam heating jacket and the third steam heating jacket, the top of the sealed housing 6 is provided with a saturated water va...

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Abstract

The invention relates to a sludge heat drying method. A steam heating jacket is arranged below a conveying device, so that a sludge raw material on a conveying surface can be subjected to heat exchange with superheated steam in the steam heating jacket in the conveying process to realize continuous drying treatment, and the treatment capacity of the device and the sludge drying efficiency are improved. In addition, by means of the mode that saturated steam generated in the drying process enters a steam compressor to be compressed, obtained superheated steam is circulated back to the steam heating jacket, the heating steam consumption and saturated steam condensation energy consumption in the drying process are greatly reduced, and the method has the advantages of being high in integration degree, small in occupied area and easy to operate.

Description

technical field [0001] The present disclosure relates to the field of thermal drying of oil refinery sludge, in particular, to a method for thermal drying of sludge. Background technique [0002] Oil refineries will produce three kinds of sludge, the first is tank cleaning sludge, the second is biochemical sludge, and the third is scum sludge, referred to as "three sludges". Due to the high water content of the "three muds", they cannot be directly reused as fuel, nor can they be directly treated in a harmless manner. At present, the treatment method of "three sludges" is generally to dry and reduce the weight first, evaporate a large part of the water in the sludge, and increase the calorific value of the sludge to the point where it can be used as fuel, and then mix it into the circulating fluidized bed boiler Burning coal is the most economical method of disposal. There is also a treatment method of "three sludges", which is to dry and reduce the amount first, evaporate...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F11/13C02F103/36
CPCC02F11/13C02F2103/365C02F2303/06C02F2303/10
Inventor 阳光军高伟军唐学文周林辉李友廷
Owner 湖南长科诚享石化科技有限公司
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