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Sludge drying chamber

A sludge drying and sludge technology, applied in the direction of dewatering/drying/concentrating sludge treatment, etc., can solve the problems of inefficient drying method, the inability of working air to achieve the purpose of drying, energy waste, etc., and achieve the goal of improving drying efficiency. Effect

Inactive Publication Date: 2013-01-16
SHAOXING INST OF TECH COLLEGE OF ENG PEKING UNIV BIOENG CENT
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, when the humidity of the sludge is high, if the high-temperature working air is used for heating, although the drying speed is high, due to the large humidity, a lot of heat energy is required, and the acquisition of the high-temperature working air needs to consume more energy. , higher quality energy, so this is an inefficient drying method; and using lower temperature working fluid air, such as using heat pump heated working fluid air to heat the sludge with high dryness, it is almost impossible Take away moisture from it, consume a lot of working fluid air but can't achieve the purpose of drying, resulting in a lot of waste of energy

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0027] Such as figure 1 As shown, the sludge drying chamber 1 includes a plurality of working medium air inlets 10, a plurality of working medium air introduction air ducts 11, a sludge dryer 6, and a hot and humid air outlet 3, wherein the working medium air flows along the working medium air The flow direction 14 flows, enters the sludge drying chamber 1 through the air inlet 10 of the working medium, and heats and dries the sludge in the sludge dryer 6, and the hot and humid air formed leaves the sludge dryer 6 according to the hot and humid air flow direction 13, and The hot and humid air is exhausted from the sludge drying chamber 1 through the exhaust outlet 3; the temperature of the working medium air in the air passage 11 of the three working medium air is different, and the sludge in one of the sludge dryers is heated. That is, the sludge drying chamber 1 includes at least two or more than two working fluid air inlets, and the temperature of the working fluid air at a...

Embodiment 2

[0033] Such as figure 2 As shown, the difference between this embodiment and Embodiment 1 is that, specifically, the sludge dryer 6 used in this embodiment includes a conveyor belt 5 and a tuyere 12 that blows air to the conveyor belt, and the working medium air is blown to the sludge 4 through the tuyere 12. Above, after the working medium air heats and dries the sludge 4, hot and humid air is formed, and finally the hot and humid air flows to the main exhaust outlet 3 in the direction indicated by the hot and humid air flow direction 13, and is discharged from the sludge drying chamber 1 through the main exhaust fan 19. The wet sludge enters the sludge drying chamber 1, and the process of transportation, heating and drying in the sludge drying chamber has been described in Embodiment 1 and will not be repeated here.

[0034] In addition, in this embodiment, different working medium air temperatures are provided by a heat exchanger 21 on the air duct 11 below which requires ...

Embodiment 3

[0041] Such as image 3 As shown, the difference between the present embodiment and the second embodiment is that the heating form of the working medium air is that the middle air duct and the lower air duct adopt their own heat exchangers 21, that is, the working air in the middle air duct and the lower air duct. The temperature of the quality air is determined by the requirements of its process. Such as Figure 6 Shown is a schematic diagram of the heat required by different humidity in the sludge drying process. The abscissa is the sludge humidity W, and the coordinate value is the ratio of the actual water content to the total water content (100%); the ordinate is the energy Q required to dry the sludge , the unit is kilowatts per hour, this kind of sludge in the case of intermediate humidity, specifically when the moisture content is 35-60%, because the sludge particles and water form a similar colloid, so the heat required for drying will be higher than that of the slud...

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Abstract

The invention relates to a sludge drying chamber, which comprises working medium air introducing ports (10), working medium air ducts (11) and a sludge dryer (6). The invention is characterized in that: the number of the working medium air introducing ports (10) is two or over two, and the temperature of the working medium air in at least one of working medium air introducing ports (10) is different from the temperature of the working medium air in other working medium air introducing ports (10). Sludge with different humidity can be heated by the working medium air at different temperatures, so that the sludge drying effect can be improved comprehensively.

Description

technical field [0001] The invention relates to a sludge drying chamber, in particular to a sludge drying chamber which improves the comprehensive utilization rate of heat energy. Background technique: [0002] Sludge drying is a process of net energy expenditure, and energy consumption accounts for more than 80% of operating costs in a standard drying system. Therefore, sludge treatment is a high energy-consuming industry, and energy is an important material basis of the national economy, which directly affects national security, sustainable development and social stability. Reducing energy consumption, enhancing heat transfer, and improving energy utilization have become major issues in the sludge treatment process. It not only reduces the country's economic burden on sludge treatment, but also plays a positive role in promoting the recovery and utilization of energy in sludge, and has broad development prospects. [0003] At present, in the existing sludge drying equipm...

Claims

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Application Information

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IPC IPC(8): C02F11/12
Inventor 张信荣盛剑霄
Owner SHAOXING INST OF TECH COLLEGE OF ENG PEKING UNIV BIOENG CENT
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