Secondary dewatering device for sludge in sewage station

Abstract

The utility model discloses a kind of sewage station sludge secondary dewatering devices, belong to sludge secondary dewatering equipment technical field, specific structure includes truss, counterweight and pressure bed frame, pressure bed frame is horizontally installed on converging slope, converging slope low place is connected with drainage ditch, truss is fixedly connected on converging slope and located above pressure bed frame, counterweight is suspended on truss by electric hoist, counterweight can extrude drainage to the water-permeable sludge bag stacked on pressure bed frame. The utility model realizes secondary dewatering by extruding sludge, sludge moisture content greatly reduces, overall weight reduces, greatly reduces the transport frequency of sludge treatment, reduces processing cost, adopts counterweight to extrude the sludge bag stacked, easy to operate.

Description

Technical Field

[0001] This utility model belongs to the technical field of sludge dewatering equipment, specifically relating to a secondary dewatering device for sludge from a sewage treatment plant. Background Technology

[0002] A pharmaceutical factory's wastewater treatment plant needs to regularly clean up the sludge it produces. This is done using tanker trucks, but the sludge has a high moisture content. Each trip costs 6500 yuan, transporting 30 cubic meters of sludge, but after dewatering, only 1-2 tons of sludge are produced. The small amount of sludge that can be processed each time results in high transportation costs. The inventor proposed using a screw press sludge dewatering machine for primary dewatering, but even after dewatering, the sludge still contains a high moisture content. Summary of the Invention

[0003] The technical problem to be solved by this utility model is to provide a secondary dewatering device for sewage treatment plant sludge, which dewaters the sludge once and then performs secondary dewatering treatment, thereby increasing the amount of sludge transported in a single operation and reducing the transportation cost.

[0004] The technical solution adopted by this utility model is as follows: a secondary dewatering device for sludge in a sewage treatment plant, including a truss, a counterweight, and a pressure bed frame. The pressure bed frame is horizontally installed on the collection slope, and the lower part of the collection slope is connected to a drainage ditch. The truss is fixedly connected to the collection slope and located above the pressure bed frame. The counterweight is suspended on the truss by an electric hoist. The counterweight can squeeze and drain the permeable sludge bags piled on the pressure bed frame.

[0005] Furthermore, a temporary placement platform is provided on the rear side of the aforementioned collection slope. The temporary placement platform has an inner cavity with an opening at the top, which is connected to the drainage ditch. A supporting mesh frame is placed at the opening at the top of the temporary placement platform.

[0006] Furthermore, the aforementioned counterweight includes a pressure plate and multiple dewatered sludge bags. The pressure plate is connected to the hook of an electric hoist via a connecting rope. Multiple sludge bags are placed on the pressure plate. After the pressure plate is lowered, it can press down on the sludge bags piled on the pressure bed frame.

[0007] Furthermore, the aforementioned electric hoist is a mobile electric hoist, which is connected to a travel track via an electric travel mechanism. The travel track is fixedly connected to the center of the top of the truss in the front-to-back direction.

[0008] Furthermore, the rear end of the aforementioned walking track extends above the temporary placement platform.

[0009] Furthermore, the aforementioned truss includes two columns, two crossbeams, and a top longitudinal beam. The two columns are fixedly connected to the flow collection slope at the front and rear, with the left side of the flow collection slope against the wall. One end of each of the two crossbeams is fixedly connected to the top of the two columns, and the other end of each crossbeam is fixedly connected to the wall. A middle longitudinal beam is fixedly connected between the two columns. Two pairs of V-shaped diagonal braces are respectively installed on the upper and lower sides of the middle longitudinal beam. The two ends of the top longitudinal beam are fixedly connected to the two crossbeams and are arranged close to the right end of the two crossbeams. The traveling track is made of I-beams and is fixedly connected to the center of the bottom of the two crossbeams. The rear end extends to the portal frame fixedly connected to the rear side of the temporary placement platform and is fixedly connected thereto.

[0010] Furthermore, the aforementioned pressure-bearing bed frame includes a space frame and supporting longitudinal beams. Multiple supporting longitudinal beams are arranged evenly at transverse intervals, with their ends fixedly connected to the front supporting pier and the rear temporary placement platform, respectively. The space frame is fixedly connected to the supporting longitudinal beams.

[0011] The beneficial effects of this utility model are as follows: Compared with the prior art, this utility model achieves secondary dewatering by squeezing the sludge, which greatly reduces the water content of the sludge and the overall weight, significantly reducing the frequency of sludge transportation and lowering the treatment cost. The use of counterweights to squeeze the stacked sludge bags makes the operation convenient, and the squeezed water is returned to the sewage treatment drainage ditch to avoid environmental pollution. The sludge obtained after treatment using this utility model is drier than that after primary dewatering, and the weight can be reduced by nearly half, greatly reducing the cost of sludge disposal. Attached Figure Description

[0012] Figure 1 A side view schematic diagram of a secondary dewatering device for sludge in a wastewater treatment plant;

[0013] Figure 2 This is a front view schematic diagram of a secondary dewatering device for sludge in a wastewater treatment plant. Detailed Implementation

[0014] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0015] Example 1: As Figure 1-2 As shown, a secondary dewatering device for sludge in a wastewater treatment plant includes a truss 1, a counterweight 2, and a pressure bed frame 3. The pressure bed frame 3 is horizontally installed on a collection slope 4. The lower part of the collection slope 4 is connected to a drainage ditch 5. The truss 1 is fixedly connected to the collection slope 4 and located above the pressure bed frame 3. The counterweight 2 is suspended on the truss 1 by an electric hoist 6. The counterweight 2 can squeeze and drain the permeable sludge bags 7 piled on the pressure bed frame 3. The sludge bags 7 are made of woven bags with permeable gaps. After squeezing, the water in the sludge will seep out, and the drainage ditch 5 flows to the inlet of the wastewater treatment plant.

[0016] During operation, the electric hoist 6 controls the counterweight 2 to a certain safe height, places the sludge bags 7 requiring secondary dewatering onto the pressure bed frame 3, and controls the electric hoist 6 to lower the counterweight 2 onto the sludge bags 7 to be compressed. After a set compression time, the moisture content is reduced to the set value, and the sludge bags are removed (stored on a temporary placement table) for the next batch of sludge bags 7 to be placed and compressed. The compressed sludge bags have significantly less moisture than before, thus reducing the weight of each bag and greatly reducing processing costs. After secondary dewatering, the moisture content of the sludge is greatly reduced, and the processing cost per ton is reduced by more than 80%. The steel structure frame of the secondary dewatering and compression device makes use of idle materials and cleverly utilizes the original wall as support, reducing renovation costs.

[0017] After conducting the experiment of this utility model, the following advantages are achieved:

[0018] 1) Significant cost reduction: Based on dry sludge, the price can be reduced to 530 yuan / ton compared to the original price of direct sludge water treatment, a cost reduction of more than 80%.

[0019] 2) Improved processing efficiency: After secondary dewatering, the sludge moisture content is significantly reduced, increasing the amount of sludge transported each time and reducing the frequency of transport.

[0020] To facilitate the stacking of the squeezed sludge bags, a temporary placement platform 8 is provided on the rear side of the collection ramp 4. The temporary placement platform 8 has an inner cavity 9 with an opening at the top, which is connected to the drainage ditch 5. The bottom of the inner cavity 10 is higher than the drainage ditch 5. A support mesh frame 10 is placed at the opening at the top of the temporary placement platform 8. By setting up the temporary placement platform 8, the squeezed sludge bags 7 can be temporarily placed. After the set quantity is reached, they can be loaded onto a vehicle for easy transportation. The inner cavity 9 connected to the drainage ditch 5 and the support mesh frame 10 can collect and discharge the seepage water.

[0021] In this embodiment, the counterweight 2 can be a steel mold filled with slow-setting cement mortar, or it can be a pre-existing extruded sludge bag with a pressure plate as a counterweight. The specific structure includes a pressure plate 201 and multiple dewatered sludge bags 5. The pressure plate 201 is hung on the hook of the electric hoist 6 by a connecting rope 202. Multiple sludge bags 5 are placed on the pressure plate 201. The number of sludge bags 5 is set as needed. After the pressure plate 201 is lowered, it can press down the sludge bags 5 stacked on the pressure bed frame 3. The existing extruded sludge bags 5 are used as extrusion counterweights. After being placed on the pressure plate, the sludge bags to be extruded are extruded to achieve water seepage. This counterweight structure is low in cost, simple to manufacture, and easy to place.

[0022] To expand the compression range, the electric hoist 6 is a mobile electric hoist. The electric hoist 6 is connected to the travel track 602 via an electric traveling mechanism 601. Driven by a motor, the electric traveling mechanism 601 travels back and forth on the travel track 602. The travel track 602 is fixedly connected to the top center of the truss 1 in the front-to-back direction. The electric hoist suspends a counterweight at different positions on the travel track, thereby enabling the compression of sludge bags at different locations and expanding the compression range. To facilitate the placement of the compressed sludge bags onto the pressure plate and the transport of the compressed sludge bags from the pressure bed frame to the temporary placement platform, the rear end of the travel track 602 extends above the temporary placement platform 8.

[0023] Specifically, the truss 1 in this embodiment includes two columns 101, two crossbeams 102, and a top longitudinal beam 103. The two columns 101 are fixedly connected to the flow collection ramp 4 from front to back. The left side of the flow collection ramp 4 is against the wall 11. One end of each of the two crossbeams 102 is fixedly connected to the top of the two columns 101, and the other end of each crossbeam 102 is fixedly connected to the wall 11. A middle longitudinal beam 104 is fixedly connected between the two columns 101. Two pairs of V-shaped diagonal braces 105 are respectively provided on the upper and lower sides of the middle longitudinal beam 104. The two ends of the top longitudinal beam 103 are fixedly connected to the two crossbeams 102 and are arranged close to the right end of the two crossbeams 102. The traveling track 602 adopts... Using I-beams, the bottom center of two crossbeams 102 is fixedly connected, and the rear end extends to the portal frame 12 fixedly connected to the rear side of the temporary placement platform 8. The truss structure has high support rigidity and strength, and good support stability. The travel track of the I-beams allows for smooth and fast movement, and the support is stable and reliable. Extending to the temporary placement platform facilitates the transport of sludge bags from the pressurized bed frame to the temporary placement platform for placement, improving the functionality. It also makes it easy to load and unload the squeezed sludge bags as counterweight in the temporary placement area. The connection between the two crossbeams 102 and the travel track 602 is reinforced with an inverted V-shaped reinforcement frame 603 to improve the reliability of the travel track connection.

[0024] In this embodiment, the pressure bed frame 3 includes a grid frame 301 and supporting longitudinal beams 302. Multiple supporting longitudinal beams 302 are arranged evenly at transverse intervals and are fixedly connected at both ends to the front supporting pier 303 and the rear temporary placement platform 8, respectively. The grid frame 301 is fixedly connected to the supporting longitudinal beams 302, which can realize the support stability and drain the squeezed water to the slope. Support legs 304 are provided near the middle of the supporting longitudinal beams, which can further improve the support stability.

[0025] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A secondary dewatering device for sludge from a wastewater treatment plant, characterized in that, It includes a truss, counterweights, and a pressure bed frame. The pressure bed frame is installed horizontally on the collection slope, and the lower part of the collection slope is connected to the drainage ditch. The truss is fixedly connected to the collection slope and located above the pressure bed frame. The counterweights are suspended on the truss by an electric hoist. The counterweights can squeeze and drain the permeable sludge bags piled on the pressure bed frame.

2. The secondary dewatering device for sludge from a wastewater treatment plant according to claim 1, characterized in that, A temporary placement platform is set up on the rear side of the collection slope. The temporary placement platform has an inner cavity with an opening at the top, which is connected to the drainage ditch. A supporting grid is placed at the opening at the top of the temporary placement platform.

3. The secondary dewatering device for sludge from a wastewater treatment plant according to claim 1, characterized in that, The counterweight includes a pressure plate and multiple dewatered sludge bags. The pressure plate is attached to the hook of the electric hoist via a connecting rope. Multiple sludge bags are placed on the pressure plate. When the pressure plate is lowered, it can press down on the sludge bags piled on the pressure bed frame.

4. The secondary dewatering device for sludge from a wastewater treatment plant according to claim 2, characterized in that, The electric hoist is a mobile electric hoist, which is connected to the travel rail via an electric walking mechanism. The travel rail is fixedly connected to the center of the top of the truss in the front-back direction.

5. The secondary dewatering device for sludge from a wastewater treatment plant according to claim 4, characterized in that, The rear end of the walking track extends above the temporary placement platform.

6. The secondary dewatering device for sludge from a wastewater treatment plant according to claim 5, characterized in that, The truss consists of two columns, two crossbeams, and a top longitudinal beam. The two columns are fixedly connected to the flow collection slope at the front and back, with the left side of the flow collection slope against the wall. One end of each of the two crossbeams is fixedly connected to the top of the two columns, and the other end of each crossbeam is fixedly connected to the wall. A middle longitudinal beam is fixedly connected between the two columns. Two pairs of V-shaped diagonal braces are installed on the upper and lower sides of the middle longitudinal beam. The two ends of the top longitudinal beam are fixedly connected to the two crossbeams and are arranged close to the right end of the two crossbeams. The traveling track is made of I-beams and is fixedly connected to the center of the bottom of the two crossbeams. The rear end extends to the portal frame fixedly connected to the back of the temporary placement platform.

7. The secondary dewatering device for sludge from a wastewater treatment plant according to claim 1, characterized in that, The pressure bed frame includes a space frame and supporting longitudinal beams. Multiple supporting longitudinal beams are evenly spaced laterally, and their ends are fixedly connected to the front supporting pier and the rear temporary placement platform, respectively. The space frame is fixedly connected to the supporting longitudinal beams.

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