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Sludge band type drier and drying processing method

A technology of sludge belt dryer and dryer, which is applied in the direction of dehydration/drying/concentrated sludge treatment, etc., which can solve the problems of high water content in sludge, high heat energy consumption, high operating cost, etc., achieve large processing capacity and save energy costs , High drying efficiency

Inactive Publication Date: 2011-03-30
BMEI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These drying equipment have mature technology and stable drying effect, but due to the high water content in the sludge and its low calorific value, a large amount of heat energy will be consumed in the drying process, so the operating cost is relatively high

Method used

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  • Sludge band type drier and drying processing method
  • Sludge band type drier and drying processing method
  • Sludge band type drier and drying processing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Such as figure 1 , 2 , 3, a sludge belt dryer is composed of a sludge noodle preparation device 2, a casing 1, a blower 11, an air duct, an exhaust blower 5, an air mixing chamber, an air heating device 10, and inside the casing 1 The sludge water-cooled screw conveyor 8 and the exhaust device 4 are composed. A sludge noodle preparation device 2 is arranged at the sludge feed inlet on the top of the box body 1 , and a feed inlet 14 and a discharge outlet 15 are respectively arranged at the upper and lower parts of the box body 1 .

[0041] The box body 1 adopts a modular arrangement, that is, the vertical modular devices 22 and 21 in the vertical direction, a drying belt 6 and its drive motor 7 are a vertical modular device, and a maximum of 2 layers of vertical modular devices can be arranged; the upper and lower adjacent The running directions between the drying belts are opposite, and the lower drying belt is set at a distance from the upper drying belt along the c...

Embodiment 2

[0049] Such as figure 1 , 2 As shown in , 3, a sludge noodle preparation device 2 is arranged on the casing 1, and the sludge water-cooled screw conveyor is two layers of drying belts 6 in the vertical direction, and each drying belt is connected to a driving motor 7. The upper and lower layers of drying belts run in opposite directions, and the lower layer of drying belts is set at a staggered distance from the upper layer of drying belts along the conveying direction; the sludge noodle preparation device 2 is set at the starting position of the upper layer of drying belts, and the prepared Sludge noodles fall on the upper drying belt, and with its movement, a lower drying belt is set under the upper drying belt. The sludge from the upper layer falls on it. A sludge screw conveying device 8 is arranged below the end of the lower drying belt to transport the dried sludge out of the box body 1 .

[0050] Such as image 3 As shown, the circulation of hot air in the box body ...

Embodiment 3

[0055] A sludge belt drying treatment method mainly includes the following steps:

[0056] (1) Pass the sludge with a water content of 65 to 85% through a sludge noodle preparation device, prepare it into noodle shapes with a diameter of 8 mm, and spread it on a belt for drying treatment;

[0057] (2) The heat is transferred from the heat source to the circulating air in the air mixing chamber through the heat exchanger. The heat source does not directly contact the sludge, and the sludge is dried by heating the air;

[0058] (3) In the air mixing chamber, certain substances carried in the sludge are pyrolyzed to form non-condensable gases. Once these gases accumulate in the circuit, they may eventually be saturated, so a small amount of circulating gas is discharged from the circuit through the fan , sent to the biological filter for treatment, and at the same time supplement the same amount of clean air to avoid the accumulation of non-condensable gas in the circuit, so as t...

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Abstract

The invention relates to a sludge band type drier and a drying processing method, belonging to the field of solid wastes. The drier comprises a sludge noodle preparing device, a box body, an air blower, an air flue, an air blower for exhausting the air, an air mixing cavity, an air heating device, a sludge water-cooling spiral conveyer arranged in the box body, and an air draft device, wherein the sludge noodle preparing device is arranged in the position of a sludge feeding port on the top of the box body; a feeding port and a discharge port are respectively arranged on the upper part and the lower part of the box body; a drying band and a driving device thereof form a vertical module device, and at most two layers of drying bands are arranged; one air draft device, one air heating device and one air blower form a horizontal module device; and the box body is provided with a plurality of air outlets and air inlets so that the sludge is blown by the lateral dry hot air from the side to reach a drying state. The system of the invention has the advantages of safe and environment-protection operation, short route of the sludge, high drying efficiency, less heat loss, simplicity in operation, low maintenance cost, safety, energy-saving performance, environmental-friendliness and recycling.

Description

technical field [0001] The invention relates to a sludge belt dryer and a drying treatment method, belonging to the field of solid waste. In particular, it relates to drying treatment equipment for reducing, harmless and stabilizing the sludge produced in urban sewage treatment. Background technique [0002] With the rapid development of my country's economy and the acceleration of urbanization, the construction of sewage treatment plants has increased, and the output of sludge has also increased rapidly. However, less than 1 / 4 of the existing sewage treatment facilities have sludge stabilization treatment facilities. The cost of sludge treatment even accounts for 50% of the treatment cost of the whole sewage plant, so the treatment and disposal of sludge has become a new focus in the comprehensive environmental management. [0003] Sludge contains concentrated inorganic and organic pollutants, as well as a large number of pathogens and various heavy metal elements. Therefor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F11/12
Inventor 孟大为蒋自力赵传军申维真穆红岩张倩高光宇张宏伟施良徐兴华刘玲刘勇李永华
Owner BMEI
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