Method for integrating sludge drying by using brickkiln fume afterheat and brick making by using sludge

A flue gas waste heat and sludge drying technology, applied in dehydration/drying/concentrated sludge treatment, solid waste removal, application, etc., can solve the problems of residue disposal, imperfect technology, large energy consumption, etc., and achieve The effect of maintaining calorific value

Inactive Publication Date: 2010-02-10
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Referring to the practice of sludge incineration abroad, some places try to achieve the purpose of sludge incineration through incineration. However, the investment in sludge incineration equipment is high, the energy consumption is large, and the operation cost is expensive. The cost of sludge incinerat

Method used

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  • Method for integrating sludge drying by using brickkiln fume afterheat and brick making by using sludge
  • Method for integrating sludge drying by using brickkiln fume afterheat and brick making by using sludge
  • Method for integrating sludge drying by using brickkiln fume afterheat and brick making by using sludge

Examples

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Effect test

Embodiment 1

[0048] A special sludge transport vehicle sends the sludge from the urban sewage treatment plant with a water content of 82% to the sludge storage, and piles it up for 4 days, and uses a mixer to homogenize the sludge on the one hand and evaporate the sludge naturally on the other hand A part of the water is released from the sludge storage, and sent to the biological soil filter bed through the induced draft fan, and discharged up to the standard.

[0049] The moisture content of the pretreated sludge is reduced to 80%, and the sludge is sent to the first sludge drying and granulating device at a certain time interval through the component feeder for the first stage of sludge drying. The first sludge drying and granulating device has a diameter of 2.2m and a length of 25m. The induced draft fan sends the flue gas discharged from the brick kiln at 170°C to the first sludge drying and granulating device to directly contact the sludge with a moisture content of 82%. The flue gas...

Embodiment 2

[0054] A special sludge transport vehicle sends the sludge from the urban sewage treatment plant with a water content of 80% to the sludge storage, and stacks it for 5 days, and uses a mixer to homogenize the sludge on the one hand and evaporate the sludge naturally on the other hand A part of the water is released from the sludge storage, and sent to the biological soil filter bed through the induced draft fan, and discharged up to the standard.

[0055] The moisture content of the pretreated sludge is reduced to 78%. The sludge is sent to the first sludge drying and granulating device at a certain time interval through the component feeder for the first stage of sludge drying. A dry sludge granulation device has a diameter of 2.4m and a length of 28m. The induced draft fan sends the flue gas discharged from the brick kiln at 180°C to the first dry granulation device to directly contact the sludge with a moisture content of 78%. The hot flue gas Heating the sludge to evaporat...

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Abstract

The invention discloses a method for integrating sludge drying by using brickkiln fume afterheat and brick making by using sludge. The method comprises the following steps of: 1) using an induced draught fan to send hot fume discharged from a brickkiln respectively to a first sludge drying and granulating device and a second sludge drying and granulating device, for purpose of two-stage sludge drying; 2) stacking urban sludge in a sludge storage warehouse and carrying out pretreatment prior to the drying; 3) using a component-type feeder to send the pretreated sludge into the first sludge drying and granulating device, for purpose of first-stage sludge drying; 4) using a conveyor to send the sludge after the first-stage sludge drying into the second sludge drying and granulating device, for purpose of second-stage sludge drying; and 5) granulating the sludge after the second-stage sludge drying; before the entrance into a sludge finished product warehouse, using a screening and separating device to uniformly mix sludge grains with brick-making clay or shale soil; and making adobes and sintering the adobes into light and energy-saving bricks. In the method, waster materials are usedfor treating waster materials, so that the urban sludge is harmlessly treated and recycled, and remarkable social and economic effects can be generated.

Description

technical field [0001] The invention relates to an integrated method of drying sludge by utilizing waste heat of flue gas from a brick kiln and making bricks from the sludge. Background technique [0002] In order to protect our limited water resources and create a good living environment, domestic sewage and industrial wastewater must be treated by sewage treatment plants, and can only be discharged after reaching the national sewage discharge standards. Whether there is an urban sewage treatment system has become a modern urban civilization. It is also an indispensable environmental engineering measure for urban ecological environment construction. According to the "Eleventh Five-Year Plan" of the national environmental protection and the "Eleventh Five-Year Plan" for the construction of urban sewage treatment and recycling facilities nationwide, all cities in my country must build sewage treatment facilities by 2010, and the urban sewage treatment rate should not be lower...

Claims

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Application Information

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IPC IPC(8): C02F11/12C04B33/00B09B3/00
Inventor 翁焕新苏闽华陈海燕
Owner ZHEJIANG UNIV
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