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Strap filter-press dehydration technique and device

A technology of belt filter press and dehydration equipment, applied in the direction of press, filtration and separation, manufacturing tools, etc., can solve the problems affecting the service life of the filter belt filter press, restricting the dehydration efficiency of the pressing, and prolonging the pressing time, etc., to achieve the pressing effect. Good, easy to implement, simplified structure effect

Active Publication Date: 2010-06-09
ZHEJIANG HUAZHANG TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the press rollers are arranged from small to large, the filter belt will become tighter and stretched during the operation of the press section, which will affect the service life of the filter belt and the entire belt filter press; and when using the same diameter When pressing the rolls, the dehydration pressure on the filter cake is always the same. Increasing the number of press rolls can only prolong the pressing time, and cannot achieve the purpose of gradually increasing the pressure, which restricts the further improvement of the pressing dehydration efficiency.

Method used

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  • Strap filter-press dehydration technique and device
  • Strap filter-press dehydration technique and device
  • Strap filter-press dehydration technique and device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] see Figure 1 to Figure 5 , the belt-type filter press dehydration equipment tie-type filter press, it is mainly composed of filter belt a, according to the order of equipment running direction 1 # ,2 # 、3 # 、4 # Squeeze rollers 1-4, filter belt driving device, filter belt tensioning device, filter belt deflection adjustment device, filter belt cleaning device, feeding device and unloading device. The belt filter press 1 # ,2 # 、3 # 、4 # Press rolls 1-4 are rubber-covered press rolls, and the surface of the roll body is provided with 2 or more protrusions or grooves with a recessed depth of 2-20 mm and a width of 3-25 mm. 12. By setting the number, width and depth of the bosses and grooves 12, the surface area of ​​the press rolls 1 to 4 increases from small to large in accordance with the running direction of the filter belt a, thereby adjusting the pressure of the dehydrated material on the press rolls 1 to 4. Pressing area and volume, along the moving directi...

Embodiment 2

[0046] see figure 1 , Figure 6-9 , 1 of the belt filter press dehydration equipment # ,2 # 、3 # 、4 # The bosses provided on the surface of the press rolls 1, 2, 3, and 4 are the same as in Embodiment 1, and are also raised rings 11 perpendicular to the roll axis. Four press rolls are provided with 4 raised rings 11, and the raised rings The width of 11 is 5-10mm, but the convex height of the rib ring 11 set on each press roll decreases from high to low according to the running direction of the filter belt a, and the outer diameters of the press rolls 1-4 after rubberizing are the same The diameters of the grooves 12 are different, and they increase sequentially according to the order of the rubber-coated press rolls. Like Example 1, the inner area of ​​the grooves 12 decreases in order accordingly. During pressing and dehydration, the dehydration pressure transmitted to the dehydrated material through the four press rolls gradually increases.

[0047] The other structure...

Embodiment 3

[0049] see figure 1 , Figure 10-13 , 1 of the belt filter press dehydration equipment of this embodiment # ,2 # 、3 # 、4 # The bosses provided on the surface of the press rolls 1, 2, 3, and 4 have 2 or more raised rings 11 perpendicular to the roll axis and 2 or more transverse ribs 13 parallel to the roll axis. 1 in the running direction of the filter belt a # ,2 # 、3 # 、4 # There are 3 protruding rings set on the press rollers 1, 2, 3, and 4, the width of which is the same as the height of the protrusions, the width is 5-10 mm, and the height of the protrusions is 3-6 mm; Figure 10-13 As shown, the quantity of the transverse ribs 13 increases from less to more according to the running direction of the filter belt a, 1 # 4 horizontal ribs 13, 2 are set on the press roll 1 # 6 horizontal ribs 13, 3 are set on the press roll 2 # 8 horizontal ribs 13, 4 are set on the press roll 3 # Ten transverse ribs 13 are arranged on the squeeze roll 4 , and the width and protru...

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Abstract

The invention discloses a belt press filtering dehydration process and a device. The belt press filter dehydration process increases the area of pressure for press filtering dehydration of dehydratedmaterials from small to large according to the running direction of a filter belt, and the received dehydration pressure is gradually increased from small to large according to the running direction of the filter belt. The outside diameter of a press roller body of the belt press filtering dehydration device is constant, two or more bosses or grooves are formed on the surface of the roller body, and the surface area of the press roller body is gradually increased from small to large according to the running direction of the filter belt. The process of the invention can gradually strengthen thedehydration press of the dehydrated materials under the condition of keeping the tension and the diameter of the press roller unchanged, and has the advantages of convenient implementation and good press effect; and the device of the invention can simplify the structure of a belt press filter, and avoid the phenomena that the filter belt becomes looser and looser or tighter and tighter, and sludge leaking, creasing or lengthening of the filter belt and so on occur in the operation of the prior art on the premise of ensuring the press effect, thereby effectively preventing the sludge from transverse leaking and improving the efficiency of the press dehydration.

Description

technical field [0001] The invention relates to a solid-liquid separation process and equipment, in particular to a belt-type filter press dehydration process and equipment suitable for dewatering high-friction viscous sludge. Background technique [0002] The belt filter press in the prior art adopts a mechanical press filter dehydration process through a press roll and a filter belt. The dehydrated material is wrapped by the upper and lower filter belts wound outside the press roll, and is subjected to the tension transmitted by the press roll. For dehydration by extrusion and shearing, the method of gradually reducing the diameter of the press roll is generally used to increase the dehydration pressure and improve the dehydration efficiency of the press. The prior art deals with viscous sludge with high friction under high tension conditions, such as tension greater than 10 N / mm. When dealing with fibrous sludge, the arrangement of the press rollers from large to small wi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D33/04B30B9/24
Inventor 唐志超李晓整胡杭滨毛怡红
Owner ZHEJIANG HUAZHANG TECH
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