Rainwater well with sewage interception and flood discharge functions for port bulk cargo storage yard

Abstract

The utility model discloses a catch basin with sewage interception and flood discharge functions for a port bulk cargo storage yard, which comprises a catch basin body, a water inlet pipe and a later rainwater discharge pipe are respectively arranged on two opposite side walls of the catch basin body, and an initial rainwater diversion pipe is connected on the side wall between the water inlet pipe and the later rainwater discharge pipe. The initial rainwater diversion pipe is close to one side of the water inlet pipe; a gabion retaining wall is arranged in the rainwater well body, namely in the middle of the well chamber, and the water inlet pipe is separated from the later rainwater drainage pipe. The utility model has the technical effects and advantages that: 1, various particulate pollutants entrained in the rainfall runoff of the bulk cargo storage yard in the harbor district can be effectively removed, and the removal efficiency of main pollutants in the early-stage rainwater is high; 2, the floor area is small, the outflow capacity is strong, the concealment is good, and the basic functions of flood control and drainage of the rainwater pipe network can be effectively ensured; and 3, no power consumption is consumed in operation, so that the comprehensive engineering investment is less, the operation cost is low, the system has strong water quality impact load resistance, the operation is simple, and the maintenance is easy.

Description

Technical Field

[0001] The utility model relates to the field of pollution control, in particular to a rainwater well used in a port bulk cargo yard and having the functions of intercepting sewage and discharging flood water. Background Art

[0002] Materials piled in the open air at the bulk cargo yard in the port area will be continuously washed by rainwater, and a large amount of pollutants will be entrained in the runoff. The main pollutants exceeding the standard are SS, chromaticity, heavy metals and petroleum hydrocarbons. This pollution characteristic, on the one hand, leads to an increase in the initial rainwater collection time and collection volume in the bulk cargo yard compared with other areas in the port, which puts great pressure on the stable operation of the rainwater treatment facilities. On the other hand, due to the sudden expansion of the cross-sectional area of ​​the rainwater well, the flow rate of rainwater runoff drops rapidly, causing a large number of suspended particle pollutants mixed in it to continuously deposit in the rainwater well, making the rainwater wells around the bulk cargo yard very easy to get blocked. This is also one of the important reasons why the flood control and drainage systems of most bulk cargo yards that have been in operation for a long time often operate poorly, and even cause waterlogging in the port area and direct discharge of rainwater and sewage.

[0003] Therefore, if a rainwater well with the dual functions of sewage interception and flood discharge suitable for bulk cargo yards in port areas can be developed, on the one hand, it can effectively reduce the concentration of pollutants in rainwater runoff and alleviate the operating pressure of the initial rainwater treatment facilities in the port area; on the other hand, it can also effectively ensure the normal operation of the basic functions of the bulk cargo yard rainwater pipeline network such as flood control and drainage, reduce the risk of waterlogging in the port area, and reduce the environmental risk of polluted rainwater flowing directly into the river (sea). Utility Model Content

[0004] In order to overcome the above-mentioned defects of the prior art, the utility model provides a rainwater well for a port bulk cargo yard which has the function of intercepting sewage and discharging flood water.

[0005] The technical solution of this utility model is as follows:

[0006] A rainwater well for use in a bulk cargo yard at a port and having the function of intercepting sewage and discharging floodwater, comprising a rainwater well body, on two opposite side walls of the rainwater well body, respectively, an inlet pipe and a later rainwater discharge pipe, an initial rainwater diversion pipe is connected to the side wall between the inlet pipe and the later rainwater discharge pipe, and the initial rainwater diversion pipe is close to one side of the inlet pipe;

[0007] A gabion retaining wall is arranged inside the rainwater well body, i.e. in the center of the well chamber, to separate the water inlet pipe from the subsequent rainwater discharge pipe.

[0008] The bottom of the initial rainwater diversion pipe is 100-600 mm lower than the bottom elevation of the water inlet pipe, and the bottom elevation of the pipe is the bottom elevation of the well chamber of the rainwater well body.

[0009] The thickness of the gabion retaining wall is determined by the size of the well chamber, the concentration of particles mixed in the initial rainwater in the port bulk cargo yard, and the treatment capacity of the initial rainwater treatment facilities configured in the port area, and is 1 / 5 to 1 / 15 of the width of the well chamber. The height of the gabion retaining wall is 50 to 200 mm higher than the top elevation of the initial rainwater diversion pipe.

[0010] The gabion retaining wall is composed of a filter wall wrapped with galvanized steel wire. The filter wall can be divided into 2 to 3 layers according to its height, and is filled with lightweight filter materials such as pebbles, gravel, blocks or volcanic rocks of different diameters to form different filter material layers; the filter wall is fixed to the bottom of the well and the inner wall with expansion bolts or embedded welded steel bars.

[0011] A well cover is installed on the top of the rainwater well body, and a step staircase is arranged on the side wall of the rainwater well body.

[0012] Technical effects and advantages of the utility model:

[0013] 1. It can effectively remove various particulate pollutants carried in the rainwater runoff of the port bulk cargo yard, and the removal efficiency of the main pollutants in the early rainwater is high.

[0014] 2. It occupies a small area, has strong outflow capacity and good concealment, and can effectively ensure the basic functions of the rainwater pipe network such as flood control and drainage.

[0015] 3. There is no power consumption during operation, so the comprehensive project investment is small, the operating cost is low, the system has strong resistance to water quality impact load, simple operation and easy maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a top view schematic diagram of the utility model;

[0017] Figure 2 for Figure 1 Middle II section;

[0018] Figure 3 for Figure 1 Middle II-II section;

[0019] Figure 4 is the filter wall section;

[0020] Figure 5 This is the layout diagram of galvanized steel wire. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only a part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] like Figures 1 to 5 A rainwater well for a bulk cargo yard at a port with sewage interception and flood discharge functions is shown, comprising a rainwater well body 1, on two opposite side walls of the rainwater well body, respectively, an inlet pipe 2 and a later rainwater discharge pipe 3 are provided, an initial rainwater diversion pipe 4 is connected to the side wall between the inlet pipe 2 and the later rainwater discharge pipe 3, and the initial rainwater diversion pipe 4 is close to one side of the inlet pipe;

[0023] A gabion retaining wall 5 is arranged inside the rainwater well body 1, i.e., at the center of the well chamber, to separate the water inlet pipe from the subsequent rainwater discharge pipe.

[0024] The bottom of the initial rainwater diversion pipe is 100-600 mm lower than the bottom elevation of the water inlet pipe, and the bottom elevation of the pipe is the bottom elevation of the well chamber of the rainwater well body.

[0025] A manhole cover 3 is installed on the top of the rainwater well body, and a step staircase 7 is arranged on the side wall of the rainwater well body.

[0026] The thickness of the gabion retaining wall is determined by the size of the well chamber, the concentration of particles mixed in the initial rainwater in the port bulk cargo yard, and the treatment capacity of the initial rainwater treatment facilities configured in the port area, and is 1 / 5 to 1 / 15 of the width of the well chamber. The height of the gabion retaining wall is 50 to 200 mm higher than the top elevation of the initial rainwater diversion pipe.

[0027] The gabion retaining wall is composed of a filter wall wrapped with galvanized steel wire. The filter wall can be divided into 2 to 3 layers according to its height, and is filled with lightweight filter materials such as pebbles, gravel, blocks or volcanic rocks of different diameters to form different filter material layers; the filter wall is fixed to the bottom of the well and the inner wall with expansion bolts or embedded welded steel bars.

[0028] A well cover is installed on the top of the rainwater well body, and a step staircase is arranged on the side wall of the rainwater well body.

[0029] Specific operation mode: At the beginning of rainfall, the most polluted initial rainwater entering the well chamber from the water inlet pipe enters the initial rainwater treatment facility in the port area through the initial rainwater diversion pipe. As the rainfall increases, when the treatment facility's processing capacity is insufficient, part of the initial rainwater cannot enter the initial rainwater diversion pipe. At this time, through the filtering effect of the filter wall, the pollutants mixed in this part of the initial rainwater are trapped between the filter materials. The filtered clean rainwater will enter the other end of the well chamber and be discharged through the outlet pipe, thereby achieving the purpose of relieving the operating pressure of the initial rainwater treatment facility in the port area. As the rainfall continues to increase, the filtering capacity of the filter wall gradually approaches saturation, the water level in front of the filter wall will gradually increase and eventually exceed the filter wall elevation. At this time, the later rainwater with a lower pollution load will directly climb over the filter wall and quickly flow into the outlet pipe, thereby ensuring smooth drainage of the rainwater pipe network, achieving the purpose of preventing waterlogging in the yard and ensuring the safety of port operations. When the rainfall gradually ends, due to the lower elevation of the initial rainwater diversion pipe, some of the clean rainwater retained on the side of the well chamber close to the outlet pipe will gradually penetrate into the left side of the well chamber through the pores of the filter wall, and wash out some of the pollutant particles intercepted by the filter wall in the early stage, which can play the role of backwashing the filter wall. The rainwater after backwashing will enter the initial rainwater treatment facility in the port area which is now vacant through the initial rainwater diversion pipe, and will be discharged or reused after further treatment to meet the standards.

[0030] Maintenance and management: The filter wall and well chamber should be regularly flushed with a high-pressure water gun to ensure smooth drainage and the purification function of the filter wall. Example

[0031] The size of a rainwater well in a coal and ore yard is 2500×2500mm, and the diameter of the inlet and outlet pipes are both 1000mm. An initial rainwater diversion pipe with a diameter of 750mm and a bottom elevation 300mm lower than the inlet and outlet pipes is set near the bottom of the rainwater well. At the same time, a metal mesh filter wall with a height of 800mm and a thickness of 250mm that runs through the well chamber is set in the well. The filter wall is divided into 3 layers along the height, and each layer is separated by a wire mesh. The first layer is 200mm high and filled with volcanic rocks with an average diameter of 5~10cm. The second and third layers are both 300mm high and filled with rough stones with an average diameter of 10~15cm and 15~30cm, respectively.

[0032] In the early stage of rainfall, due to the small rainfall, the initial rainwater scouring intensity is limited, and the concentration of particles carried in the rainwater runoff is high but the particle size is small. Due to the flow blocking effect of the filter wall, this part of rainwater will all enter the initial rainwater treatment facilities in the port area through the initial rainwater diversion pipe; with the increase of rainfall, the runoff scouring effect gradually increases, and the initial rainwater begins to carry coal and ore particles with larger particle sizes. At this time, the treatment capacity of the initial rainwater treatment facilities tends to be saturated. This part of rainwater carrying large particles will be gradually purified under the filtering effect of the filter wall, and the large particles are trapped inside the filter wall. With the further increase of rainfall intensity, the water level in front of the filter wall will gradually increase and eventually exceed the filter wall elevation. At this time, the later rainwater with a large flow but a low pollution load will directly cross the filter wall and quickly flow into the outlet pipe, thereby ensuring the smooth drainage of the rainwater pipe network, achieving the purpose of preventing waterlogging in the yard and ensuring the safety of port operations.

[0033] This facility can effectively remove larger coal and ore particles carried in the rainwater runoff from the bulk cargo yard. Depending on the sedimentation conditions in the rainwater well, the bottom of the rainwater well can be sucked out and the filter wall can be backwashed through a manhole installed on the ground.

[0034] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A rainwater well for bulk cargo yard in a port with sewage interception and flood discharge function, characterized in that: It includes a rainwater well body, on two opposite side walls of the rainwater well body, there is a water inlet pipe and a later rainwater discharge pipe respectively, and an initial rainwater diversion pipe is connected to the side wall between the water inlet pipe and the later rainwater discharge pipe, and the initial rainwater diversion pipe is close to one side of the water inlet pipe; A gabion retaining wall is arranged inside the rainwater well body, i.e. in the center of the well chamber, to separate the water inlet pipe from the subsequent rainwater discharge pipe.

2. A rainwater well for a port bulk cargo yard having the function of intercepting sewage and discharging flood water according to claim 1, characterized in that: The bottom of the initial rainwater diversion pipe is 100-600 mm lower than the bottom elevation of the water inlet pipe, and the bottom elevation of the pipe is the bottom elevation of the well chamber of the rainwater well body.

3. The rainwater well for port bulk cargo yard with sewage interception and flood discharge function according to claim 1 is characterized in that: The thickness of the gabion retaining wall is 1 / 5 to 1 / 15 of the width of the well chamber, and the height of the gabion retaining wall is 50 to 200 mm higher than the top elevation of the initial rainwater diversion pipe.

4. The rainwater well for port bulk cargo yard with sewage interception and flood discharge function according to claim 1 is characterized in that: The gabion retaining wall is composed of a filter wall wrapped with galvanized steel wire. The filter wall can be divided into 2 to 3 layers according to the height, and is filled with pebbles, gravel, blocks or volcanic rocks of different diameters to form different filter material layers; the filter wall is fixed to the bottom and inner wall of the well with expansion bolts or embedded welded steel bars.

5. The rainwater well for port bulk cargo yard with sewage interception and flood discharge function according to claim 1 is characterized in that: A well cover is installed on the top of the rainwater well body, and a step staircase is arranged on the side wall of the rainwater well body.

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