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Sludge drying treatment system and process

A sludge drying and treatment system technology, which is applied in the directions of dehydration/drying/concentration sludge treatment, pyrolysis treatment sludge, by-product vaporization, etc., can solve the problem that continuous pyrolysis treatment, addition and removal of sludge cannot be realized The sludge process is cumbersome, difficult to produce and treat on a large scale, and achieves the effects of no latent heat loss of vaporization, low heating energy consumption, and high production efficiency

Active Publication Date: 2013-09-18
NINGBO FUSHIDA ELECTRIC ENG
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention aims to solve the problem that the prior art sludge drying treatment system cannot realize continuous pyrolysis treatment of sludge, the process of adding and taking out sludge is cumbersome, and it is difficult to realize large-scale production and treatment. Pyrolysis of wet sludge, sludge drying treatment system with high production efficiency and low energy consumption

Method used

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  • Sludge drying treatment system and process
  • Sludge drying treatment system and process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Such as figure 1 , figure 2The sludge drying treatment system shown in the figure includes a sludge storage tank 1, a high-pressure sludge pump 2, an internal spiral low-temperature pyrolysis device and a filter press 3 connected in sequence through pipelines, and the internal spiral low-temperature pyrolysis device and A pressure gauge 11 and a regulating valve 4 are arranged on the pipeline between the filter presses 3. The pressure gauge 11 is located in front of the regulating valve 4. The inner spiral low-temperature pyrolysis device includes a shell 5, which is provided with a thermostat along its length. Decomposition pipeline 6, the two ends of the pyrolysis pipeline 6 are welded to the shell 5, the opening of the pyrolysis pipeline 6 close to the high-pressure sludge pump 2 forms a material inlet 7, and the other end forms a material outlet 8, the connection between the pyrolysis pipeline 6 and the shell 5 The cavity between them forms a steam heating chamber...

Embodiment 2

[0041] Compared with Example 1, the sludge drying treatment system in this example differs in that the spiral fins 10 are inclined 45° toward the material outlet 8, and the rest are exactly the same as those in Example 1, so details are not repeated here.

[0042] A sludge drying treatment process, comprising the following steps:

[0043] (a) Add a dehydrating agent to the sludge storage tank 1 and mix it evenly and let it stand still. The amount of the dehydrating agent added is 7% of the sludge mass in the sludge storage tank 1, and the water content of the sludge in the sludge storage tank 1 The rate is 90%, and the dehydrating agent is composed of the following components in mass percentage: NaHCO 3 55%, FeCl 3 12%, 33% hydrogen peroxide with a mass concentration of 85%.

[0044] (b) The sludge mixed with the dehydrating agent in the sludge storage tank 1 is sent to the inner screw low-temperature pyrolysis device through the high-pressure sludge pump 2 for pyrolysis. ...

Embodiment 3

[0048] Compared with Example 1, the sludge drying treatment system in this example differs in that the spiral fins 10 are inclined 35° toward the material outlet 8, and the rest are identical to those in Example 1, so details will not be repeated here.

[0049] A sludge drying treatment process, comprising the following steps:

[0050] (a) Add a dehydrating agent to the sludge storage tank 1, mix evenly and let it stand still. The amount of the dehydrating agent added is 10% of the sludge mass in the sludge storage tank 1, and the water content of the sludge in the sludge storage tank 1 The rate is 98%, and the dehydrating agent is composed of the following components in mass percentage: NaHCO 3 60%, FeCl 3 20%, 20% hydrogen peroxide with a mass concentration of 85%.

[0051] (b) The sludge mixed with the dehydrating agent in the sludge storage tank 1 is sent to the inner screw low-temperature pyrolysis device through the high-pressure sludge pump 2 for pyrolysis. The slud...

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Abstract

The invention discloses a sludge drying treatment system, and solves the problems in the prior art that the continuous pyrolysis treatment on sludge can not be realized by using the sludge drying treatment system, the sludge feeding and taking process is complex, and the large-scale production and treatment are hard to realize. The sludge drying treatment system comprises a sludge storage tank, a high-pressure sludge pump, an internal spiral low-temperature pyrolysis device and a filter press which are connected through pipelines in sequence, wherein a pressure gauge and an adjusting valve are arranged on the pipeline between the internal spiral low-temperature pyrolysis device and the filter press; the pressure gauge is positioned in front of the adjusting valve. By utilizing the sludge drying treatment system, the continuous pyrolysis on the wet sludge is realized, the production efficiency is high, the energy consumption is low, and the operation is convenient and rapid. The invention further discloses a sludge drying treatment process. A dehydration prompting agent is added in the low-temperature high-pressure pyrolysis process, so that the process steps are simplified, the dehydration property of the sludge is greatly improved; when the sludge is mechanically hydrated by using the filter press, the water content of the sludge meets the requirements that the sludge can be fed into an incineration furnace, and the sludge does not need to be further dried.

Description

technical field [0001] The invention relates to the technical field of sludge treatment, in particular to a sludge drying treatment system and process. Background technique [0002] Sludge treatment is an important part of the sewage treatment system. Commonly used sludge treatment technologies generally include three aspects of sludge concentration, dehydration and drying. Among them, sludge dehydration is the most difficult part of sludge treatment. The bulky sludge is not easy to transport, which greatly increases its treatment cost. After concentration and digestion, the sludge still has a water content of more than 70%, and the volume is still very large. In order to facilitate comprehensive utilization and final disposal, the sludge needs to be dehydrated to turn the liquid sludge into a semi-solid state. [0003] The water contained in sludge can be divided into four categories: free water (70%), water contained in bacterial micelles (27%), capillary water (2%) and b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F11/10C02F11/14
CPCY02W10/40
Inventor 张斌立陈朝阳
Owner NINGBO FUSHIDA ELECTRIC ENG
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