CN101254368B - Sludge squeezing filtering method and sludge strong press-pate machine used for the method - Google Patents

Abstract

The invention provides a method for pressing and filtering sludge. It includes the following steps in turn: 1) forming several parallel sludge filling spaces that can be compressed in conjunction, 2) filling the sludge filling space with sludge to be filtered, 3) compressing the sludge filling space by hydraulic pressure space, squeeze and filter sludge, 4) open the sludge filling space, and remove the sludge. The present invention also provides a sludge powerful dewatering machine applying the method. It consists of several plates arranged in parallel and can move back and forth relative to each other along the direction of arrangement. The dehydrator is provided with a hydraulic device for driving the plates at one end, and the plates include adjacently arranged pressing plates with concave surfaces and pressing plates with convex surfaces. ; The dehydrator is provided with a sealing member for the space between the pressing plate with the concave surface and the pressing plate with the convex surface when they are inserted and matched. The invention has high working efficiency, the dehydration pressure can reach 3-5Mpa per square centimeter, the moisture content of the sludge can be removed to below 45%, and the sludge treatment capacity is large, which is suitable for the treatment needs of urban sewage sludge.

Description

A method of squeezing and filtering sludge and a powerful sludge dehydrator used in the method

technical field

The invention relates to the technical field of sludge dewatering method and equipment with high water content.

technical field

Sewage treatment is an important part of environmental protection, and a large amount of sludge with high water content will be produced in sewage treatment. At present, these sludges are dewatered through plate and frame filters, drum centrifuges or belt press filters, but it is difficult for these three types of equipment to adopt high pressing pressure and centrifugal pressure, and the moisture content of the sludge after dehydration is generally still at 75. %~80%. Most of the dehydrated sludge is sent to landfill, and a small part of sludge with high calorific value is added to coal for combustion after being dried or dried. Among them, the sludge transported to the landfill has a relatively high moisture content, and the bulldozer is stuck in the wheel when it is working, so it cannot be landfilled. It takes a long time to dry, causing mosquitoes and flies to breed and pollute the environment. Many landfills are unwilling to accept it and fill it at the same time. Buried sludge occupies a large amount of land, therefore, the current sludge treatment has become an urgent problem to be solved.

Contents of the invention

The first technical problem to be solved by the present invention is to provide a sludge pressing and filtering method capable of dewatering sludge with a high water content to a lower water content. For this reason, the present invention adopts following technical scheme: it comprises the following steps successively:

1), forming several parallel sludge filling spaces that can be compressed in linkage,

2) Fill the sludge filling space with sludge to be filtered,

3) Use hydraulic pressure to compress the sludge filling space, press and filter the sludge,

4) Open the sludge filling space and remove the sludge.

Due to the adoption of the technical scheme of the present invention, the present invention can use hydraulic pressure as the pressing power, and the working efficiency is high, and the dehydration pressure can reach 3-5Mpa per square centimeter, and the pressing force is far greater than that of plate and frame filter, drum centrifuge and belt press The filter greatly improves the pressing efficiency, can reduce the moisture content of the sludge to less than 45%, and has a large sludge treatment capacity, which can be applied to the treatment needs of urban sewage sludge.

Another technical problem to be solved by the present invention is to provide a powerful sludge dehydrator with simple structure and applying the above method. For this reason, the present invention adopts the following technical solutions: it includes several plates arranged in parallel and relatively movable back and forth along the arrangement direction, the dehydrator is provided with a hydraulic device for driving the plates at one end, and the plates include adjacently arranged plates with Concave press plate and convex press plate; at least one of the facing concave and convex surfaces is covered with filter cloth, and the dehydrator is provided with two plates when the concave press plate and the convex press plate The sealing member of the space between, the dehydrator is provided with the filtrate outflow channel that communicates with the concave surface and the convex surface covered with the filter cloth. Due to the adoption of the technical solution of the present invention, the present invention has a simple structure, and can realize the formation of the sludge filling space and compress the sludge filling space with only one set of hydraulic devices. The work efficiency is high, and the dehydration pressure can reach up to 3-5Mpa, the pressing force is much greater than that of the plate-and-frame filter, drum centrifuge and belt press filter, which greatly improves the pressing efficiency and can reduce the moisture content of the sludge to below 45%, and the sludge treatment capacity is large , can be applied to the treatment needs of urban sewage sludge.

Description of drawings

Fig. 1 is a schematic appearance diagram of an embodiment of the present invention.

Fig. 2 is a schematic diagram of two pressing plates with a concave surface and a pressing plate with a convex surface according to an embodiment of the present invention before they are inserted and fitted.

Fig. 3 is an enlarged view of I in Fig. 2 .

Fig. 4 is an enlarged view of II in Fig. 3 .

Fig. 5 is a schematic diagram of cooperation between a press plate with a concave surface and a press plate with a convex surface according to an embodiment of the present invention when the sludge filling space is formed.

Fig. 6 is a schematic diagram of cooperation between a press plate with a concave surface and a press plate with a convex surface according to an embodiment of the present invention after the sludge charging space is compressed.

Fig. 7 is a schematic front view of a press plate with a concave surface according to an embodiment of the present invention.

Fig. 8 is a schematic front view of a press plate with a convex surface according to an embodiment of the present invention.

Detailed ways

Refer to attached picture. The present invention includes several plates arranged in parallel and capable of moving back and forth relative to each other along the arrangement direction. The dehydrator is provided with a hydraulic device 100 for driving the plates at one end, and the hydraulic device pushes a pressing plate 101 at one end of the plates. Reference numeral 103 is located at the other end. pressure plate. In this embodiment, a supporting slide rail 102 of the plate that can move back and forth relatively is provided beside the plate, and the plate is provided with hanging ears and pulleys 105 supported on the slide rail 102 . Foldable pull rods can be connected between the plates. In this way, when the oil cylinder drives the pressing plate 101 to retreat, the plates can be pulled apart one by one through the transmission of the pull rod. Of course, the device that drives the plate to move relative to the front and back or the device that makes the plate move is by no means limited to the pull rod, even if no linkage mechanism is used. It is not impossible to pull the plate.

The plates include adjacently arranged pressboards 1 with concave surfaces 10 and pressboards 2 with convex surfaces 20; All are concave. The press plate 2 with a convex surface may also have a convex surface on one side and a concave surface on the other side; and the press plate 1 with a concave surface also has a concave surface on one side and a convex surface on the other side. In addition, only one side of the press board 1 and the press board 2 may have the above profile. In this embodiment, the shape of the convex surface and the concave surface is circular, and the convex surface and the concave surface may also be in other shapes, such as rectangle. The number and size of the plates of the present invention can be determined according to the sludge treatment output requirements.

At least one of the facing concave and convex surfaces is covered with a filter cloth 3, and the dehydrator is provided with a seal for the space between the two plates when the pressing plate with the concave surface and the pressing plate with the convex surface are inserted and fitted, so The sealing member is a sealing ring 8 arranged on the periphery of the boss forming the convex surface. The dehydrator is provided with a filtrate outflow channel 4 communicating with the concave and convex surfaces covered with filter cloth.

In order to further improve the dehydration effect, the concave and convex surfaces covered with filter cloth can be provided with filtrate diversion grooves 5, and a support net 6 is arranged between the surface with filtrate diversion grooves and the filter cloth.

The present invention is also provided with an elastic stop mechanism between the plates. In this way, the formation of the sludge filling space can be facilitated, so that the sludge can be more fully transported into the sludge filling space. In this embodiment, a very simple implementation of the elastic stop mechanism is provided. The elastic stop mechanism is an elastic column 7, such as a rubber column, located on the surface of the plate. In this embodiment, the elastic column 7 is located on Press plate 2. Elastic stop mechanism also can adopt spring.

In this embodiment, the filter cloth 3 is provided with molding strips 31 around, and the press plate covering the filter cloth is provided with a slotting groove 32 matching with the molding strips.

The side wall of the concave plate forming the concave surface is provided with a sludge inlet hole 9, and the sludge hole is inclined upward, which can help to avoid dripping of the sludge to be filtered when the sludge filling space is opened. Reference numeral 90 is a mud inlet pipe.

While working, proceed as follows:

1) Start the hydraulic mechanism 100, the press plate 1 and the press plate 2, and when the press plate 1 and the press plate 2 are about to enter the concave-convex insertion, their states are shown in FIG. 2 . Continue to push, when the sealing ring contacts the sealing surface of the press plate 1, a sludge filling space between the press plate 1 and the press plate 2 is formed, and the state at this time is shown in Figure 4. The free length of the elastic column 7 is preferably able to meet the following conditions: when the sludge filling space is formed, the elastic column 7 can touch the press plate 1, which can prevent the press plate 1 and the press plate 2 from collapsing when the sludge has not been input. Excessive insertion will affect the output of sludge treatment.

2), the hydraulic mechanism 100 can temporarily stop the driving action, and the sludge pump will fill the sludge filling space with the sludge to be filtered 104 through the sludge pipe 90 and the sludge inlet hole 9, and rely on the pump force to pre-fill the sludge. Dewater and fill the sludge filling space.

3) After the sludge is full, the hydraulic mechanism 100 continues to work to compress the sludge filling space and press and filter the sludge. The state at this time is shown in Figure 5. Since a strong hydraulic pressure can be used, the dehydration pressure per square meter The dehydration effect is very good, and the output of dehydration treatment is very large, which can meet the treatment of large quantities of sludge in cities.

4) After the dehydration is completed, the hydraulic mechanism 100 pulls back, and the press plate 1 and the press plate 2 change from the inserted and mated state to the separated state, thereby opening the sludge filling space, and the sludge is removed by gravity.

5), the above steps are repeated.

Claims (5)

1. enhanced sludge dewatering machine, it is characterized in that it comprises the plate that several are arranged in parallel and can relatively move along the orientation front and back, described dewaterer at one end is provided with the hydraulic means that drives plate, described plate comprises the rammer board with concave surface of adjacent arrangement and has the rammer board of convex surface, the described rammer board insertion cooperation that has the rammer board of concave surface and have convex surface; One of them face is coated with filter cloth in concave surface of facing mutually and the convex surface, described dewaterer is provided with when the rammer board with concave surface and rammer board with convex surface insert to cooperate the seal in space between two plates, and described dewaterer is provided with the filtrate flow pass that communicates with concave surface that is coated with filter cloth and convex surface; Described seal is the sealing ring that is arranged on the boss periphery that forms convex surface; Described filter cloth periphery is provided with filler rod, and the rammer board of described covering filter cloth is provided with the caulking groove that cooperates with filler rod;

Described two sides, rammer board front and back with convex surface is convex surface, and the two sides, rammer board front and back with concave surface is concave surface; Perhaps, described one side with rammer board of convex surface is a convex surface, and another side is a concave surface; Rammer board with concave surface simultaneously is concave surface, and the another side of notch board is a convex surface.

2. enhanced sludge dewatering machine as claimed in claim 1 is characterized in that described concave surface and the convex surface that is coated with filter cloth is provided with the filtrate guiding gutter, and be provided with supporting network between this face of establishing the filtrate guiding gutter and filter cloth.

3. enhanced sludge dewatering machine as claimed in claim 1 is characterized in that it is provided with elasticity stop mechanism between the plate.

4. enhanced sludge dewatering machine as claimed in claim 3 is characterized in that described elasticity stop mechanism is an elasticity post of being located at the plate surface.

5. enhanced sludge dewatering machine as claimed in claim 1, the notch board sidewall that it is characterized in that forming concave surface is provided with mud and enters the mud hole.

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