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Quick drying method for sludge

A silt and fast technology is applied in the field of promoting rapid dehydration and drying of dredged silt in rivers and lakes in the storage yard. The effect of reducing energy consumption and saving construction costs

Active Publication Date: 2014-07-09
JIANGSU JIANGDA ECOLOGICAL SCI & TECHCO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method also combines vacuum preloading with soil freezing and thawing to consolidate silt soft soil foundation with drainage, and achieves better results. However, this method still has the following problems: (1) During the freezing process, the free Water also freezes into ice, increasing energy loss
(2) The condensing pipe is inserted in the back, and the drainage board is inserted first, and the condensing pipe is inserted later, so that the condensing pipe cannot form a closed circuit in the soil, and the energy diffuses slowly in the soil, prolonging the freezing time
(3) It is necessary to lay brambles, mountain soil cushions and sand cushions on the silt surface, which increases the project cost
(4) With the drying and sinking of the soil, air leakage will inevitably occur in the soil, which will reduce the pumping efficiency of the drainage board
(6) A period of 4-6 months of sedimentation and drainage is required before construction, which also prolongs the construction period considerably

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0064] Embodiment one: a kind of silt rapid drying method, take the following steps:

[0065] (1) Pre-buried drainage board. The sludge container is an iron box of 1m (length) × 1m (width) × 1m (height). Put a 1.2-long drainage board in the middle of the iron box with a hole diameter of 100 μm. In order to prevent it from floating or changing its position, fix its upper and lower ends, and pay attention to reserve 0.6m for the upper end.

[0066] (2) Pre-buried condenser pipe. Place a U-shaped copper tube in the middle of the iron box. The size of the copper tube is 16mm×1.5mm, the total length is 1.5m, and it is bent into a U shape.

[0067] (3) Embedded temperature sensor. Put 3 temperature sensors in the iron box to make them evenly distributed.

[0068] (4) Inject mud. Inject dredging mud into the iron box until the entire iron box is filled.

[0069] (5) Add 50ppm flocculant and 80ppm polyaluminum chloride coagulant to the iron box.

[0070] (6) Drain non-point so...

Embodiment 2

[0088] Embodiment two: a kind of silt rapid drying method, take the following steps:

[0089] (1) The experimental container is transformed from a container, and the internal dimensions are 5.7m (length) × 2.1m (width) × 2.2m (height).

[0090] (2) Pre-buried drainage board. Lay drainage boards at intervals of 70×70cm, and lay two rows in the container. The drainage boards are arranged in a triangle, each 2.5m long, and the hole diameter is 80μm. In order to prevent it from floating or changing its position, its lower end is fixed at the bottom of the container, its upper end is fixed at 0.4m from the top of the container, and 0.7m is reserved for the upper end.

[0091] (3) Install vacuum branch pipes and supervisors. Branch pipes and main pipes are made of hard plastic pipes with a diameter of 70mm. Connect the drainage board to the branch pipes through the joints, and connect all the branch pipes to the main pipe to form a pipe network system.

[0092](4) Pre-buried co...

Embodiment 3

[0114] Embodiment three: a kind of method that promotes the rapid drying of dredged silt in the stockyard, take the following steps:

[0115] (1) The sludge storage yard is a drying pond with an internal size of 15m (length) × 15m (width) × 4m (depth) and a volume of 900m 3 . The excavation is 2.5m below the ground, and the height of the cofferdam is 1.5m. Lay 2 layers of sealing film inside the drying tank for anti-seepage treatment.

[0116] (2) Pre-buried drainage board. Drainage boards are laid at intervals of 80×80cm, and the drainage boards are arranged in a triangle, each length is 4.5m, and the hole diameter is 90μm. In order to prevent it from floating or changing its position, its lower end is fixed on the bottom of the drying tank, and its upper end is fixed 1m away from the surface opening of the drying tank. Note that 1.5m should be reserved for the upper end.

[0117] (3) Install vacuum branch pipes and supervisors. Branch pipes and main pipes are made of ha...

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Abstract

The invention relates to a quick drying method for sludge. The method comprises the following steps of: firstly, previously embedding a water discharging plate, a condenser pipe and a temperature sensor in a storage yard; inputting sludge into the storage yard, and preliminarily concentrating to fill the storage yard; and vacuumizing, and when the vacuumization is carried out again till the water yield is obviously reduced after 'freezing-unfreezing', stopping to check and accept. According to the method, the soil body can be quickly converted into the plastic state or the semi-solid state from the flowing state; and compared with the existing quick drying method, the quick drying method can greatly shorten the work period and save the construction cost.

Description

technical field [0001] The invention relates to a sludge drying treatment method, in particular to a rapid dehydration and drying method for promoting river and lake dredging sludge in a stockyard, and belongs to the field of sludge drying treatment. Background technique [0002] River and lake silt is usually a mixture of clay, silt, organic matter and various minerals, which is formed by depositing at the bottom of the water body after long-term physical, chemical and biological actions and water body transportation. [0003] my country has a vast territory, numerous rivers and lakes, and is in the stage of rapid urbanization development. A large amount of mud waste is produced every year. According to the survey, only 69.83% of the area of ​​Taihu Lake in Jiangsu is covered by silt with a thickness of more than 0.1 meters, and the thickest part is more than 5 meters. , the total volume of silt is 1.912 billion cubic meters, and the average depth is 1.24 meters. [0004] T...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F11/12C02F11/14C02F11/20
Inventor 吕志刚蒋浩司文攻常健惠祖刚
Owner JIANGSU JIANGDA ECOLOGICAL SCI & TECHCO