Sand discharging system of aerated grit chamber

Abstract

The utility model provides an aerated grit chamber sand discharge system which comprises a grit chamber, a water inlet channel, a grit chamber and a water outlet channel are arranged in the grit chamber, the water inlet channel is connected with the grit chamber through a pipeline, a plurality of sand collecting grooves are arranged at the bottom of the grit chamber, each sand collecting groove is connected with one end of a sand suction pipe, and the other end of the sand suction pipe is connected with a sand discharge pump. A flushing ring pipe is arranged at the bottom of the sand collecting tank, the flushing ring pipe is connected with the other end of the water flushing pipe and one end of a flushing air pipe, and the other end of the flushing air pipe is connected with an aeration pipe; the aerator pipes are connected with blowers; the other end of the water suction pipe is connected with a water outlet channel which is connected with a water outlet pipe. According to the aeration grit chamber, a bottom grit discharge system is adopted, no upper component is arranged, the whole chamber can be completely sealed, and the problem of deodorization of the aeration grit chamber is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of aerated grit chambers, in particular to a sand discharge system for an aerated grit chamber. Background Art

[0002] At present, aerated grit chamber is a common sewage treatment process in municipal sewage treatment plants. Its basic principle is to set an aeration pipe in the grit chamber. Through aeration, the organic particles in the wastewater are suspended and swirled. The sand particles rub against each other and bear the shear force of aeration, and the organic pollutants attached to the sand particles can be removed. At the same time, under the centrifugal force of the swirling flow, these sand particles with higher density are thrown to the outside and sink into the sand collecting tank, while the organic matter with lower density flows forward with the water flow and is carried to the next treatment unit. After the sand particles sink into the sand collecting tank, a bridge-type sand suction machine located at the top of the tank body is usually used to suck the sand out of the water surface; under normal sand pumping conditions, the sand suction pump of the bridge-type sand suction machine can effectively suck sand, but under normal circumstances, the sand pump is easy to damage. If it is not repaired in time after damage, the sand is easy to deposit and compact in the grit chamber; after the sand is compacted, it is difficult to suck out the sand again, which usually causes poor sand discharge and requires stopping production and cleaning the tank before restarting. Summary of the invention

[0003] In view of the deficiencies in the prior art, the utility model provides an aerated grit chamber sand discharge system to solve the defects of the prior art that the bridge-type sand suction machine cannot suck sand smoothly and the sand is easy to be compacted.

[0004] The technical solution adopted by the utility model is:

[0005] An aerated grit chamber sand discharge system, comprising: a grit chamber, wherein an inlet channel, a grit chamber and an outlet channel are arranged in the grit chamber, the inlet channel and the grit chamber are connected by a pipeline, a plurality of sand collecting troughs are arranged at the bottom of the grit chamber, each sand collecting trough is connected to one end of a corresponding sand suction pipe, the other end of the sand suction pipe is connected to a sand discharge pump, the wall of the grit chamber is connected to a slope component, the slope component is located above the sand suction pipe, the outlet of the sand discharge pump is connected to a sand-water separator through a sand outlet main pipe, the sand outlet main pipe is connected to one end of a water flushing pipe, a flushing ring pipe is arranged at the bottom of the sand collecting trough, the flushing ring pipe is respectively connected to the other end of the water flushing pipe and one end of a flushing air pipe, the other end of the flushing air pipe is connected to an aeration pipe, and the aeration pipe is connected to a blower;

[0006] The inlet of the sand discharge pump is connected to one end of a water suction pipe, the other end of the water suction pipe is connected to a water outlet channel, and the water outlet channel is connected to the water outlet pipe;

[0007] The flushing air pipe is provided with a first valve; the sand suction pipe is provided with a second valve; the water suction pipe is provided with a third valve; and the water flushing pipe is provided with a fourth valve.

[0008] Preferably, in the aerated grit chamber sand discharge system, the incoming water enters the water inlet channel through the water inlet pipe and then flows into the grit channel.

[0009] Preferably, the aerated grit chamber sand discharge system, wherein: the slope assembly includes a first slope and a second slope, the first slope is connected to one side of the grit chamber wall and is located above the sand suction pipe, the slope is arranged on the other side of the grit chamber wall, and the angles between the first slope, the second slope and the grit chamber wall are both 55°~60°.

[0010] Preferably, in the aerated grit chamber sand removal system, a sand removal pump is arranged outside the grit chamber, an inlet of the sand removal pump is connected to one end of a suction pipe, and the other end of the suction pipe passes through the wall of the grit chamber to connect to the outlet channel.

[0011] Preferably, in the aerated grit chamber sand discharge system, the flushing ring pipe comprises a vertical pipe and a horizontal pipe, and the vertical pipe and the horizontal pipe are assembled into a ring shape and arranged on the inner periphery of the sand collecting tank.

[0012] Preferably, in the aerated grit chamber sand discharge system, holes are provided at a 45° angle at the lower part of the vertical pipe and the horizontal pipe, and the diameter of the holes is 8-10 mm.

[0013] Preferably, in the aerated grit chamber sand discharge system, the first valve, the second valve, the third valve and the fourth valve are all electric valves.

[0014] Advantages of the utility model:

[0015] (1) In the traditional bridge-type sand suction machine structure, since the sand suction pipe extends from the top of the pool to the long sand collecting trough at the bottom, it is necessary to open a long hole at the top of the pool, and it is difficult to seal and deodorize the top of the pool. The aerated grit chamber sand discharge system of the utility model adopts a bottom sand discharge system without upper components, and the entire pool can be completely sealed, solving the problem of deodorization of the aerated grit chamber.

[0016] (2) The aerated grit chamber sand discharge system of the utility model adopts bottom sand discharge. Through the staggered configuration of the first slope and the second slope and through slope finding, a sand collecting trough area is formed below the first slope. When the sand collecting trough area is backwashed, there will be locally disturbed water flow and air flow in the sand collecting trough area. Due to the setting of the first slope, the disturbed water flow and air flow will be confined to the sand collecting trough area and will not affect the vortex state of the water flow in the upper grit channel.

[0017] (3) In the sand discharge system of the aerated grit chamber of the utility model, a flushing ring pipe is provided in the sand collecting tank, and a flushing air pipe and a water flushing pipe are connected to the flushing ring pipe. The flushing air pipe and the aeration pipe use the same air source, so there is no need to add air source equipment for the aerated grit chamber, thereby saving overall cost.

[0018] (4) The sand removal system of the aerated grit chamber of the utility model adds two water inlet and outlet pipelines and valves on the basis of the sand removal pump and the original advanced water outlet pipe system, namely the water suction pipe and the water flushing pipe. The water after the sand settling treatment is used in conjunction with the flushing ring pipe for water backwashing. Since the water outlet pressure of the sand removal pump is large, the water flow disturbance of the outlet water far exceeds that of air washing, which can fundamentally solve the problem of sand compaction in the sand collecting tank. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the utility model.

[0020] Figure 2 It is the main diagram of the utility model.

[0021] Figure 3 This is a schematic diagram of the structure of the flushing ring pipe.

[0022] Figure 4 for Figure 3 A partial enlarged view of middle A.

[0023] Explanation of the accompanying drawings: 1-water inlet pipe, 2-water inlet channel, 3-sand settling channel, 4-water outlet channel, 5-water outlet pipe, 6-sand collecting trough, 7-sand suction pipe, 8-sand discharge pump, 9-sand outlet main pipe, 10-sand and water separator, 11-water flushing pipe, 12-flushing air pipe, 13-aeration pipe, 14-flushing ring pipe, 15-water suction pipe, 121-first valve, 71-second valve, 151-third valve, 111-fourth valve, 142-vertical pipe, 143-horizontal pipe, 61-first slope, 62-second slope. DETAILED DESCRIPTION

[0024] The utility model is further described below in conjunction with specific drawings and embodiments.

[0025] like Figure 1-4 As shown: This embodiment provides an aerated grit chamber sand discharge system, which includes a grit chamber, wherein an inlet channel 2, a grit chamber 3 and an outlet channel 4 are arranged in the grit chamber, wherein the inlet channel 2 and the grit chamber 3 are connected by a pipeline, wherein a plurality of sand collecting troughs 6 are arranged at the bottom of the grit chamber 3, wherein each sand collecting trough 6 is connected to one end of a sand suction pipe 7, wherein the other end of the sand suction pipe 7 is connected to a sand discharge pump 8, wherein the wall of the grit chamber is connected to a slope assembly, wherein the slope assembly is located above the sand suction pipe 7, wherein the outlet of the sand discharge pump 8 is connected to a sand-water separator 10 through a sand outlet main pipe 9, wherein the sand outlet main pipe 9 is connected to one end of a water flushing pipe 11, wherein a flushing annular pipe 14 is arranged at the bottom of the sand collecting trough 6, wherein the flushing annular pipe 14 is respectively connected to the other end of the water flushing pipe 11 and one end of a flushing air pipe 12, wherein the other end of the flushing air pipe 12 is connected to an aeration pipe 13, wherein the aeration pipe 13 is connected to a blower;

[0026] The inlet of the sand removal pump 8 is connected to one end of the water suction pipe 15, the other end of the water suction pipe 15 is connected to the water outlet channel 4, and the water outlet channel 4 is connected to the water outlet pipe 5;

[0027] The flushing air pipe 12 is provided with a first valve 121 ; the sand suction pipe 7 is provided with a second valve 71 ; the water suction pipe 15 is provided with a third valve 151 ; and the water flushing pipe 11 is provided with a fourth valve 111 .

[0028] The incoming water enters the water inlet channel 2 through the water inlet pipe 1 and then flows into the sand settling channel 3; the slope assembly includes a first slope 61 and a second slope 62, the first slope 61 is connected to one side of the wall of the sand settling tank and is located above the sand suction pipe 7, the slope 62 is arranged on the other side of the wall of the sand settling tank, and the angles between the first slope 61, the second slope 62 and the wall of the sand settling tank are both 55°~60°; the sand discharge pump 8 is arranged outside the sand settling tank, and the inlet of the sand discharge pump 8 is connected to one end of the water suction pipe 15, and the water suction pipe 1 5 passes through the wall of the grit chamber and is connected to the outlet channel 4; the flushing ring pipe 14 includes a vertical pipe 142 and a horizontal pipe 143, which are assembled into a ring and arranged on the inner periphery of the sand collecting tank 6; the diameter of the flushing ring pipe 14 is DN50, and the lower parts of the vertical pipe 142 and the horizontal pipe 143 are both provided with orifices 141 at an angle of 45°, and the diameter of the orifices 141 is 8-10 mm; the first valve 121, the second valve 71, the third valve 151 and the fourth valve 111 are all electric valves.

[0029] The working process of this utility model:

[0030] Step 1. The incoming water enters the water inlet channel 2 through the water inlet pipe and flows into the sand settling channel 3. Under the action of aeration in the aeration pipe, the water flow presents a circulation state, and the sand particles in the water are hydraulically separated. The separated sand particles settle on the first slope 61 and the second slope 62. As the sand particles gradually fall, a sand layer will be formed on the first slope 61. The sand collecting trough 6 adopts a design method of sloping from four sides to the middle, and the sand on the sand layer will slowly slide down and finally gradually concentrate in the sand collecting trough 6;

[0031] Step 2. Turn on the sand pump 8, and suck the accumulated sand out through the sand suction pipe 7 pre-buried in the upper center of the sand collecting tank 6, and enter the sand-water separator 10 through the sand outlet main pipe 9 to complete the separation of inorganic sand particles and water.

[0032] Step 3. Since multiple sand collecting troughs 6 are arranged along the length direction in the sand settling channel 3, each sand collecting trough 6 is provided with a sand suction pipe 7, and a second valve 71 is provided on the sand suction pipe 7, and sand suction operation can be performed on each sand collecting trough 6 through a control program; a flushing ring pipe 14 is arranged at the bottom of the sand collecting trough 6, and the flushing ring pipe 14 adopts a DN50 pipe diameter, and its bottom is opened at a 45° angle to both sides. The aeration pipe 13 is aerated by a blower during daily operation, and the flushing air pipe 12 is connected to the aeration branch pipe 131. The first valve 121 is installed on the flushing air pipe 12, and a program is set to open the first valve every hour to introduce the aeration part into the sand collecting trough 6 for flushing for 5 minutes to prevent the sand in the sand collecting trough 6 from being deposited and compacted and difficult to be sucked out by the sand discharge pump 8.

[0033] Finally, it should be noted that the above specific implementation methods are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to examples, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. An aerated grit chamber sand discharge system, characterized by: The invention comprises a sand settling tank, wherein an inlet channel (2), a sand settling channel (3) and an outlet channel (4) are arranged in the sand settling tank, wherein the inlet channel (2) and the sand settling channel (3) are connected by a pipeline, wherein a plurality of sand collecting troughs (6) are arranged at the bottom of the sand settling channel (3), wherein each sand collecting trough (6) is connected to one end of a sand suction pipe (7), wherein the other end of the sand suction pipe (7) is connected to a sand discharge pump (8), wherein the wall of the sand settling tank is connected to a slope component, wherein the slope component is located above the sand suction pipe (7), wherein the outlet of the sand discharge pump (8) is connected to a sand-water separator (10) via a sand discharge main pipe (9), wherein the sand discharge main pipe (9) is connected to one end of a water flushing pipe (11), wherein a flushing ring pipe (14) is arranged at the bottom of the sand settling tank (6), wherein the flushing ring pipe (14) is respectively connected to the other end of the water flushing pipe (11) and one end of a flushing air pipe (12), wherein the other end of the flushing air pipe (12) is connected to an aeration pipe (13), wherein the aeration pipe (13) is connected to a blower; The inlet of the sand discharge pump (8) is connected to one end of a water suction pipe (15), the other end of the water suction pipe (15) is connected to a water outlet channel (4), and the water outlet channel (4) is connected to the water outlet pipe (5); A first valve (121) is provided on the flushing air pipe (12); a second valve (71) is provided on the sand suction pipe (7); a third valve (151) is provided on the water suction pipe (15); and a fourth valve (111) is provided on the water flushing pipe (11).

2. The aerated grit chamber sand removal system according to claim 1, characterized in that: Incoming water enters the water inlet channel (2) through the water inlet pipe (1) and then flows into the sand settling channel (3).

3. The aerated grit chamber sand removal system according to claim 1, characterized in that: The slope assembly comprises a first slope (61) and a second slope (62), wherein the first slope (61) is connected to one side of a wall of the grit chamber and is located above the sand suction pipe (7), and the slope (62) is arranged on the other side of the wall of the grit chamber, and the angles between the first slope (61), the second slope (62) and the wall of the grit chamber are both 55° to 60°.

4. The aerated grit chamber sand removal system according to claim 1, characterized in that: The sand discharge pump (8) is arranged outside the sand settling tank, and the inlet of the sand discharge pump (8) is connected to one end of a water suction pipe (15), and the other end of the water suction pipe (15) passes through the wall of the sand settling tank and is connected to the outlet channel (4).

5. The aerated grit chamber sand discharge system according to claim 1, characterized in that: The flushing ring pipe (14) comprises a vertical pipe (142) and a horizontal pipe (143), and the vertical pipe (142) and the horizontal pipe (143) are assembled into a ring shape and arranged on the inner periphery of the sand collecting tank (6).

6. The aerated grit chamber sand removal system according to claim 5, characterized in that: The lower parts of the vertical tube (142) and the horizontal tube (143) are both provided with orifices (141) at an angle of 45 degrees, and the diameter of the orifices (141) is 8-10 mm.

7. The aerated grit chamber sand removal system according to claim 1, characterized in that: The first valve (121), the second valve (71), the third valve (151) and the fourth valve (111) are all electric valves.

Images