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
  • Description
  • 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

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0026] Example one

[0027] Such as figure 1 As shown, the sludge drying chamber 1 includes a plurality of working fluid air inlets 10, a plurality of working fluid air inlet ducts 11, a sludge dryer 6, a humid and hot air outlet 3, where the working fluid air runs along the working fluid air It flows in the flow direction 14, enters the sludge drying chamber 1 through the working fluid air inlet 10, and heats the sludge in the sludge dryer 6 to dry the sludge. The hot and humid air formed leaves the sludge dryer 6 in the flow direction 13 of the hot and humid air, and The sludge drying chamber 1 is discharged from the hot and humid air outlet 3; the temperature of the three working medium air introduced into the air duct 11 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 working fluid air inlets, and the working fluid air temperature of at least one working fluid air inlet is different from th...

Example Embodiment

[0032] Example two

[0033] Such as figure 2 As shown, the difference between this embodiment and the first embodiment is that, specifically, the sludge dryer 6 used in this embodiment includes a conveyor belt 5 and a tuyere 12 for blowing air to the conveyor belt. The working medium air is blown to the sludge 4 through the tuyere 12 Above, the working fluid air heats and dries the sludge 4 to form hot and humid air. Finally, the hot and humid air flows to the main exhaust port 3 in the direction indicated by the flow direction 13 of the hot and humid air, 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 fluid air temperatures are caused by a heat exchanger 21 provided on the lower air duct...

Example Embodiment

[0040] Example three

[0041] Such as image 3 As shown, the difference between this embodiment and the second embodiment is that the heating mode of the working fluid air is that the middle air duct and the lower air duct adopt their own heat exchangers 21, that is, the working medium in the middle air duct and the lower air duct The temperature of the quality air is determined by its process requirements. Such as Image 6 Shown is a schematic diagram of the heat required for different humidity in the sludge drying process, the abscissa is the sludge humidity W, 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. When this kind of sludge has an intermediate humidity, specifically when the moisture content is 35-60%, since the sludge particles and water form a similar colloid, the heat required for drying will be higher than the moisture content....

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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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