Double-spiral type feeding cloth clamping device and filter pressing device

Abstract

The invention relates to a double-spiral type feeding cloth clamping device and a filter pressing device. According to the invention, a first sludge inlet channel is arranged in the center of a feeding cloth clamping device body; a second sludge inlet channel for guiding sludge into a filter cavity of a filter plate from the first sludge inlet channel is arranged on a disc surface located on one side of the feeding cloth clamping device body; the second sludge inlet channel is distributed in a spiral shape; and spiral flow guide reinforcing ribs are arranged on the inner wall of the first sludge inlet channel. Since the spiral flow guide reinforcing ribs are arranged on the inner wall of the first sludge inlet channel, the hindering effect on rotary flowing sludge is reduced, and it is guaranteed that the sludge advances at a certain centrifugal force; and since the second sludge inlet channel distributed in the spiral shape conforms to the motion trail that the sludge is sprayed into the second sludge inlet channel from the first sludge inlet channel in a centrifugal mode, sludge entering resistance is reduced to the greatest extent, the speed of sludge entering a press chamber of a plate-and-frame filter and the distribution uniformity of the sludge are enhanced, the problem of non-uniform water content of a sludge cake in a pressing process of the plate-and-frame filter is effectively avoided, and the phenomenon of plate explosion is completely eradicated.

Description

technical field [0001] The invention relates to a sludge treatment device, in particular to a double-screw feeding clamp and a filter press device. Background technique [0002] Sludge dewatering is a very important part of the sludge treatment process and a prerequisite for subsequent sludge disposal and resource utilization. Sludge treatment plants usually use mechanical dehydration methods for sludge dewatering. Common mechanical dehydration methods mainly include belt filtration, vacuum filtration, plate and frame filtration, and centrifugation. Among them, the plate and frame filter press method is widely used because of its good dehydration effect, simple structure, easy operation, reliable operation, and low cost. [0003] When the plate and frame filter press is used for sludge dewatering, the sludge first rotates at a certain flow rate into the first channel of the cloth gripper under the action of the high-pressure pump. The reinforcing ribs in the first channel o...

AI Technical Summary

Problems solved by technology

[0003] When the plate and frame filter press is used for sludge dewatering, the sludge first rotates at a certain flow rate into the first channel of the cloth gripper under the action of the high-pressure pump. The reinforcing ribs in the first channel of the traditional cloth gripper are often the same as the cylindrical pipe. Parallel setting, which will inevitably cause greater resistance to the rotating sludge

On the other hand, the second channel on one side of the conventional cloth gripper is radially distributed along the end face of the cloth gripper, and the protrusions between the second passages are usually designed as fan rings. When the sludge advancing in the first passage reaches the cloth gripper At the entrance of the second channel of the filter, the sludge is blocked by the fan ring, which produces a large resistance, which reduces the speed of sludge injection into the filter press chamber, is not conducive to the uniform distribution of sludge, and easily leads to uneven moisture content of the sludge dewatered cake The phenomenon of "clamping"

If the sludge entering the filter press chamber is partially dehydrated and consolidated before reaching the entire chamber in time, it will affect the subsequent sludge entry, resulting in local cavities, and even "explosion" during the filter press dehydration process.

[0004] The Chinese patent with the publication number CN 201342275 Y discloses a sludge distributor and a filter press device of a plate and frame filter press. The first through hole, on one end face of the sludge distributor, is provided with a diversion groove along the radial direction to guide the sludge from the first through hole into the filter cavity of the filter plate, and the two side walls of the diversion groove are spiral, The two side walls of the diversion groove of the second channel are spiral, which can realize the uniform distribution of sludge on the filter plate, and overcome the uneven distribution of moisture content of mud cake and dehydration caused by uneven distribution of sludge to a certain extent. The problem of low efficiency, but the sludge distributor in this invention still has a large resistance to the sludge sprayed into the second channel in the direction of the tangential circle of the first channel, and the effect is not good in practical applications

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