Backwashing device for siphoning type mud scraping and sucking bridge

Abstract

The utility model discloses a backwashing device for a siphoning type mud scraping and sucking bridge, which comprises a bridge body, a backflow sludge channel used for conveying sludge is arranged on the bridge body, a plurality of siphons used for sucking sludge in sewage are welded on one side of the backflow sludge channel at equal intervals, a backwashing water pump is arranged on the side face of the bridge body, and the backwashing water pump is communicated with the backflow sludge channel. The backwashing water pump is electrically connected with a water pump control cabinet fixed on the bridge body, and the side surface of the bridge body is connected with a backwashing main pipe through welding. According to the backwashing device for the siphoning type mud scraping and sucking bridge, backwashing water used by the backwashing device is locally obtained from supernatant liquid of a secondary sedimentation tank, the device does not increase extra water consumption, and the backwashing device is provided with a pressure testing part and a pressure relief part, so that whether operation is normal or not can be tested when the backwashing device is started; and after operation, pressure relief can be performed to prevent the influence of the dead weight of water stored in the pipe on the operation of the mud scraping bridge.

Description

TECHNICAL FIELD

[0001] The utility model relates to sewage treatment equipment technical field, concretely is a backflushing device for siphon type scraping suction mud bridge. BACKGROUND

[0002] According to the statistics of the Ministry of Housing and Urban-Rural Development "2021 Urban Construction Statistical Yearbook", the annual sewage treatment capacity of China's cities and towns has reached 61.19 billion cubic meters by 2021, and the most widely used method for sewage treatment in China's municipal sewage treatment plants is biological method, and the most mature application in biological method is activated sludge method and its modified process. In the related process based on activated sludge method, the tail water that has not been clarified plays a crucial role in the secondary sedimentation tank. On the one hand, through the natural sedimentation of the secondary sedimentation tank, the process of separating mud and water is completed, and the supernatant is obtained to enter the subsequent process; on the other hand, the sludge after sedimentation is collected, a part of which is returned to the front-end biological reaction tank by backflow to supplement the sludge amount carried out with the effluent, and the other part enters the sludge treatment system, which reduces the water content in the sludge through the corresponding sludge reduction means, facilitating subsequent sludge disposal.

[0003] However, the siphon type secondary sedimentation tank collects mud mainly by the liquid level difference in the liquid tank to generate siphon phenomenon and complete the collection of bottom sludge. However, due to process needs or equipment maintenance needs, the secondary sedimentation tank often needs to be shut down. During the shutdown period, the sludge in the siphon pipe may appear anaerobic and cause sludge expansion, which often leads to the blockage of sludge in the local siphon pipe. In high sludge concentration operation, it may also cause blockage. After the siphon pipe is blocked, the sludge in the siphon pipe needs to be recovered by manual cleaning, which greatly increases the time for the pool group to recover after shutdown and the labor cost.

[0004] In view of the above problems, it is urgent to make innovative design on the basis of the original backflushing device. UTILITY MODEL CONTENTS

[0005] The utility model technical scheme provides a backflushing device for siphon type scraping suction mud bridge, which is significantly different from the prior art solution, to solve the problem of sludge expansion in the siphon pipe during shutdown, which often leads to the blockage of sludge in the local siphon pipe, and the problem of blockage in high sludge concentration operation, which needs to be recovered by manual cleaning after the siphon pipe is blocked.

[0006] In order to achieve the above object, the utility model provides the following technical scheme: a backflushing device for siphon type scraping and sucking mud bridge, including the bridge body, the bridge body is equipped with the backflow sludge channel for sludge delivery, and a plurality of siphon pipes for sucking sludge in sewage are welded at equal intervals on one side of the backflow sludge channel, the backflushing water pump is installed on the side of the bridge body, and the backflushing water pump is electrically connected with the water pump control cabinet fixed on the bridge body, the backflushing dry pipe is connected to the side of the bridge body through welding, the backflushing water inlet pipe and a plurality of backflushing pipes are connected below the backflushing dry pipe respectively, and the test / pressure relief pipe is connected to the end of the backflushing dry pipe, in addition, the test / pressure relief valve is arranged on the test / pressure relief pipe, the lower end of each backflushing pipe is connected to the outer wall below the siphon pipe one by one, and the backflushing valve is arranged on each backflushing pipe, and the backflushing water inlet valve is arranged on the backflushing water inlet pipe.

[0007] Preferably, the water pump control cabinet is fixed on the bridge deck through the mounting support mode.

[0008] Preferably, the backflushing water pump is placed in a stainless steel cage, the stainless steel cage is installed below the designed water surface height by 0.5m-1m, and is fixed on the side of the mud scraping bridge through welding.

[0009] Preferably, the backflushing pipe is provided with an L-shaped structure, the material of the backflushing pipe and the backflushing dry pipe is stainless steel, and the backflushing water inlet pipe and the backflushing pipe are connected through welding.

[0010] Preferably, the other end of the backflushing water inlet pipe is connected with the backflushing water pump through a flange.

[0011] Preferably, the side of each backflushing pipe is fixed on the side of the bridge body through welding support, and the lower end of each backflushing pipe is connected in the corresponding siphon pipe through punching and is connected through welding, the test / pressure relief valve, the backflushing valve and the backflushing water inlet valve are connected with the corresponding pipe section through the threaded connection mode.

[0012] Compared with the prior art, the utility model has the advantages that: the backflushing device for siphon type scraping and sucking mud bridge: (1) the backflushing device uses backwashing water from the supernatant of the secondary sedimentation tank, and the device does not increase additional water consumption.

[0013] (2) the backflushing device is provided with a test and pressure relief part, when starting, whether the operation is normal can be tested, and after the operation is completed, pressure relief can be carried out to prevent the influence of the water storage in the pipe on the operation of the mud scraping bridge.

[0014] (3) the backflushing device is relatively simple to operate, and ordinary inspection personnel can independently operate, so that the timeliness of solving the siphon pipe blockage is greatly improved. BRIEF DESCRIPTION OF DRAWINGS

[0015] Fig. 1 It is a front view structural schematic diagram of the utility model;

[0016] Fig. 2 It is a side view structural schematic diagram of the utility model.

[0017] In the drawing: 1, bridge body; 2, backflow sludge channel; 3, siphon; 4, backwashing water pump; 5, backwashing dry pipe; 6, backwashing water inlet pipe; 7, backwashing pipe; 8, test / pressure relief pipe; 9, test / pressure relief valve; 10, backwashing valve; 11, backwashing water inlet valve; 12, water pump control cabinet. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the protection scope of the utility model.

[0019] Please refer to Figs. 1-2 The utility model provides a kind of technical scheme: a backwashing device for siphon type scraping mud bridge, including bridge body 1, backflow sludge channel 2, siphon 3, backwashing water pump 4, backwashing dry pipe 5, backwashing water inlet pipe 6, backwashing pipe 7, test / pressure relief pipe 8, test / pressure relief valve 9, backwashing valve 10, washes in water valve 11 and water pump control cabinet 12, bridge body 1 is equipped with backflow sludge channel 2 for sludge delivery, and backflow sludge channel 2 side equidistantly welds several siphons 3 for pumping sludge in sewage, and bridge body 1 side is equipped with backwashing water pump 4, and backwashing water pump 4 is electrically connected with water pump control cabinet 12 fixed on bridge body 1, bridge body 1 side is connected by welding with backwashing dry pipe 5, and backwashing dry pipe 5 lower portion is respectively connected with backwashing water inlet pipe 6 and several backwashing pipes 7, and backwashing dry pipe 5 end is connected with test / pressure relief pipe 8, in addition, test / pressure relief pipe 6 is equipped with test / pressure relief valve 9, and the lower end of each backwashing pipe 7 is connected to the outer wall below siphon 3 one by one, and each backwashing pipe 7 is equipped with backwashing valve 10, and backwashing water inlet pipe 6 is equipped with backwashing water inlet valve 11.

[0020] Bridge body 1 bridge deck is fixed with water pump control cabinet 12 by mounting support mode.

[0021] Backwashing water pump 4 is placed in a stainless steel cage, and the mounting position of the stainless steel cage is 0.5m-1m lower than the design water surface height, and is fixed on the side of the mud scraping bridge by welding.

[0022] The back flushing pipe 7 is arranged in an L-shaped structure, and the back flushing pipe 7 and the back flushing dry pipe 5 are made of stainless steel, and the back flushing water inlet pipe 6 and the back flushing pipe 7 are connected by welding.

[0023] The other end of the back flushing water inlet pipe 6 is connected with the back flushing water pump 4 through a flange.

[0024] The side of each back flushing pipe 7 is fixed to the side of the bridge body 1 through a welding support, and the lower end of each back flushing pipe 7 is connected in a corresponding siphon pipe 3 through punching and is connected by welding, and the pressure test valve 9, the back flushing valve 10 and the back flushing water inlet valve 11 are connected with corresponding pipe sections through a threaded connection.

[0025] Working principle: in the initial normal working state, the power supply in the water pump control cabinet 12 is in the off state, and the pressure test valve 9, the back flushing water inlet valve 11 and the back flushing valve 10 are in the closed state.

[0026] When a siphon pipe 3 is blocked, the slow flow of sludge in the connection area of the backflow sludge channel 2 and the siphon pipe 3 is observed, the pressure test is first performed, the pressure test valve 9 and the back flushing water inlet valve 11 are opened, the power supply in the water pump control cabinet 12 is turned on, and the back flushing water pump 4 is started, if water flows out of the pressure test pipe 8, it indicates that the back flushing water pump 4 is running normally, and the back flushing operation is started.

[0027] At this time, the back flushing valve 10 on the back flushing pipe 7 connected with the blocked siphon pipe 3 is opened, the pressure test valve 9 is closed, and the normal running time is about 5 minutes, and when the sludge flow speed in the connection area of the backflow sludge channel 2 and the blocked siphon pipe 3 is restored to normal, the power supply of the water pump control cabinet 12 is turned off in time, and the back flushing water pump 4 is turned off, so as to prevent too much back flushing water from entering the system and affecting the concentration of the backflow sludge.

[0028] Next, the pressure relief operation is performed, the pressure test valve 9 is opened, the back flushing water inlet valve 11 and the back flushing valve 10 are closed, the water in the pipe is self-flowed from the pressure test valve 9, the pressure test valve 9 is closed, and the pressure relief operation mainly prevents the corrosion of the water stored in the pipe to the pipe and the increase of the self-weight of the whole sludge scraping bridge to affect the normal operation, and the whole back flushing operation is completed, which is the working principle of the back flushing device for the siphon type sludge scraping bridge.

[0029] Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirits of the utility model, and the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. A backwash device for siphon-type wiper silt bridges, comprising a bridge body (1), characterized in that: The bridge body (1) is provided with a backflow sludge channel (2) for sludge delivery, and a plurality of siphon pipes (3) for pumping sludge in sewage are welded at equal intervals on one side of the backflow sludge channel (2), a backwashing water pump (4) is installed on the side of the bridge body (1), and the backwashing water pump (4) is electrically connected with a water pump control cabinet (12) fixed on the bridge body (1), a backwashing dry pipe (5) is connected to the side of the bridge body (1) by welding, a backwashing water inlet pipe (6) and a plurality of backwashing pipes (7) are connected below the backwashing dry pipe (5) respectively, a test / pressure relief pipe (8) is connected to the end of the backwashing dry pipe (5), in addition, a test / pressure relief valve (9) is arranged on the test / pressure relief pipe (8), the lower end of each backwashing pipe (7) is connected to the outer wall below the siphon pipe (3) one by one, and a backwashing valve (10) is arranged on each backwashing pipe (7), and a backwashing water inlet valve (11) is arranged on the backwashing water inlet pipe (6).

2. A backwash device for a squeegee wiper bridge according to claim 1, wherein: The water pump control cabinet (12) is fixed on the bridge deck of the bridge body (1) by mounting a support.

3. A backwash device for a squeegee wiper bridge according to claim 1, wherein: The backwashing water pump (4) is placed in a stainless steel cage, and the stainless steel cage is installed at a position lower than the design water surface height by 0.5-1m, and is fixed on the side of the mud scraping bridge by welding.

4. A backwash device for a squeegee wiper bridge according to claim 1, wherein: The backwashing pipe (7) is provided in an "L" shape, and the materials of the backwashing pipe (7) and the backwashing dry pipe (5) are stainless steel, and the backwashing water inlet pipe (6) and the backwashing pipe (7) are connected by welding.

5. A backwash device for a squeegee wiper bridge according to claim 1, wherein: The other end of the backwashing water inlet pipe (6) is connected to the backwashing water pump (4) through a flange.

6. A backwash device for a squeegee wiper bridge according to claim 1, wherein: The side of each backwashing pipe (7) is fixed on the side of the bridge body (1) by welding a support, and the lower end of each backwashing pipe (7) is connected in the corresponding siphon pipe (3) by punching and welding, and the test / pressure relief valve (9), the backwashing valve (10) and the backwashing water inlet valve (11) are connected to the corresponding pipe sections by screw connection.

Images