CN207545976U - A kind of reversed cleaning device of sewage treatment pipeline Inner filter net - Google Patents

Abstract

The utility model provides a reverse cleaning device for a filter screen in a sewage treatment pipeline, which includes a sewage pipe and a filter screen. The plurality of deflectors are distributed vertically at intervals, and the filter net and the downstream sewage pipe are respectively connected with a slag discharge pipe and a flushing pipe, and the flushing pipe is arranged downstream of the deflector, and the slag discharge pipe and the flushing pipe Valves are arranged on the top, and valves are also arranged on the sewage pipe upstream of the slag discharge pipe and the sewage pipe downstream of the flushing pipe. In order to solve the problems in the existing shale gas sewage treatment system, the filtered impurities in the pipeline are not easy to remove, and the filter screen is easy to be blocked and difficult to maintain. The utility model belongs to the technical field of shale gas development.

Description

Reverse cleaning device for inner filter screen of sewage treatment pipeline

technical field

The utility model provides a shale gas return sewage filter device, which belongs to the technical field of shale gas development.

Background technique

The current shale gas development technology mainly adopts hydraulic fracturing. The hydraulic fracturing method is to inject a mixture of some chemical substances, water and sediment into underground wells through high pressure, and fracture the nearby shale reservoir structure to give adsorption and The free shale gas creates pores and fracture channels, which is beneficial to the collection of shale gas. The reservoirs of shale gas reservoirs are generally characterized by low porosity and low permeability, and the resistance to gas flow is greater than that of conventional natural gas. The horizontal well drilling and hydraulic fracturing techniques necessary for shale gas development consume a lot of water, and the fracturing is completed. Finally, the fracturing fluid should be flowbacked. The COD content in the flowback sewage is extremely high, about 5,000-10,000mg/L, which is much higher than the requirements of Class I B of the national standard GB18918-1002. Due to the distribution of shale gas blocks Therefore, in the process of treating the flowback sewage, various problems such as the difficulty of uniform treatment will be encountered, so the sewage treatment of shale gas has always been a difficult problem to solve.

In order to solve the sewage treatment problem of shale gas, a sewage treatment system that does not require the use of chemicals and will not cause secondary pollution to water sources is designed. The organic matter in the sewage is removed by chemical and physical treatment processes using an electrochemical pool. and salts are discharged in solid form to achieve the purpose of pollutant degradation and transformation. The solid particles in the sewage are filtered out through the filter screen, but the filter screen is installed in the pipeline, and the filtered impurities are not easy to remove, and the filter screen is prone to clogging and difficult to maintain. .

Contents of the invention

The purpose of this utility model is to provide a reverse cleaning device for the filter screen in the sewage treatment pipeline to solve the problem that in the existing shale gas sewage treatment system, the filtered impurities in the pipeline are not easy to remove, and the filter screen is prone to blockage, which is not easy to clean. maintenance etc.

In order to solve the above problems, it is planned to adopt such a reverse cleaning device for the filter screen in the sewage treatment pipeline, which includes a sewage pipe and a filter screen. The filter screen is arranged in the sewage pipe. The plurality of deflectors are vertically spaced, that is, two adjacent deflectors leave a deflector gap in the vertical direction, and the filter net and the downstream sewage pipe are respectively connected with slag discharge pipes and A flushing pipe, and the flushing pipe is arranged downstream of the deflector, valves are arranged on both the slag discharge pipe and the flushing pipe, and valves are also provided on the sewage discharge pipe upstream of the slag discharge pipe and the sewage discharge pipe downstream of the flushing pipe.

In the aforementioned cleaning device, there are five deflectors in total, and the five deflectors are evenly distributed vertically and equidistantly in the sewage pipe;

In the aforementioned cleaning device, the flushing pipe is correspondingly provided with a water supply device for pressurizing the water for flushing the pipe and supplying water to the pipe;

In the aforementioned cleaning device, the flushing pipe is directly connected with the running water pipe.

Compared with the prior art, the utility model uses the filter to filter the shale gas return sewage, and after closing the corresponding two valves on the sewage pipe, opening the valves and water supply devices on the slag discharge pipe and flushing pipe, it can also clean the waste water. The filter screen and the sewage pipe around the filter screen are cleaned by reverse flushing. During cleaning, the flushing liquid is separated and guided through the deflector, so that all parts of the filter screen can be well washed by the flushing liquid, effectively improving the penetration of the filter screen. The cleaning effect solves the problem that the sewage filter is easy to block and is difficult to clean inside the pipe, and it is easy to remove the dregs filtered by the filter, effectively avoiding the blockage of the sewage pipe.

Description of drawings

Fig. 1 is a structural representation of the utility model;

Fig. 2 is a schematic cross-sectional structure diagram of the sewage pipe A-A in Fig. 1 .

Detailed ways

Below in conjunction with accompanying drawing, the utility model is further described.

Example:

Referring to Fig. 1 and Fig. 2, a device for reversely cleaning the filter screen in the sewage treatment pipeline provided by this embodiment includes a sewage pipe 1 and a filter screen 2, the filter screen 2 is arranged in the sewage pipe 1, and the filter screen 1 is located in the sewage pipe 1. The downstream side of the net 2 is provided with five deflectors 3 along the horizontal direction, and the five deflectors 3 are evenly distributed vertically in the sewage pipe 1, that is, any two adjacent deflectors 3 leave a gap in the vertical direction. The diversion gaps are equally spaced, and the sewage pipe 1 on the upper and lower reaches of the filter screen 2 is also connected with a slag discharge pipe 4 and a flushing pipe 5, and the flushing pipe 5 is arranged downstream of the deflector 3, and the slag discharge pipe 4 and the flushing pipe 5 are arranged downstream of the deflector 3. The flushing pipes 5 are provided with valves 6, the sewage pipe 1 upstream of the slag discharge pipe 4 and the sewage pipe 1 downstream of the flushing pipe 5 are also provided with valves 6, and the flushing pipes 5 are correspondingly provided with a water supply device 7 for flushing The water in the pipes is pressurized and feeds the pipes.

Claims (4)

1. a kind of reversed cleaning device of sewage treatment pipeline Inner filter net, including blow-off pipe (1) and filter screen (2), filter screen (2) is set It is placed in blow-off pipe (1), it is characterised in that：Downstream side in blow-off pipe (1) positioned at filter screen (2) is horizontally arranged with multiple lead Flowing plate (3), vertically compartment is distributed the multiple deflector (3), is also distinguished on the blow-off pipe (1) of filter screen (2) upstream and downstream Scum pipe (4) and flush pipe (5) are provided with and communicated with, and flush pipe (5) is set to the downstream of deflector (3), scum pipe (4) and punching It washes on pipe (5) and is both provided with valve (6), on the blow-off pipe (1) of scum pipe (4) upstream and the blow-off pipe (1) in flush pipe (5) downstream On be also equipped with valve (6).

2. a kind of reversed cleaning device of sewage treatment pipeline Inner filter net according to claim 1, it is characterised in that：Deflector (3) there are five altogether, five deflectors (3) are vertically equidistantly uniformly distributed in blow-off pipe (1).

3. a kind of reversed cleaning device of sewage treatment pipeline Inner filter net according to claim 1, it is characterised in that：Flush pipe (5) it is correspondingly arranged on water supply installation (7).

4. a kind of reversed cleaning device of sewage treatment pipeline Inner filter net according to claim 1, it is characterised in that：Flush pipe (5) directly it is connected with running water pipe.