Reverse cleaning device for filter screen in sewage treatment pipeline

Abstract

The invention provides a reverse cleaning device for a filter screen in a sewage treatment pipeline. The reverse cleaning device for the filter screen in the sewage treatment pipeline comprises a discharge pipe and the filter screen, wherein the filter screen is arranged in the discharge pipe; a plurality of guide plates are arranged on the downstream side, located on the filter screen, in the discharge pipe along a horizontal direction, and are distributed at intervals along a vertical direction; a slag discharge pipe and a washing pipe are respectively arranged on the discharge pipe on the upstream and the downstream of the filter screen in a communicating way; the washing pipe is arranged on the downstream of the guide plates; valves are respectively arranged on the slag discharge pipe and the washing pipe; valves are also arranged on the discharge pipe on the upstream of the slag discharge pipe and the discharge pipe on the downstream of the washing pipe. The problems that in an existing shale gas sewage treatment system, impurities filtered in the pipeline cannot be cleaned easily, the filter screen is blocked easily, and the maintenance cannot be carried out easily are solved. The reverse cleaning device for the filter screen in the sewage treatment pipeline provided by the invention belongs to the technical field of shale gas development.

Description

technical field [0001] The invention provides a shale gas flowback sewage filtering device, which belongs to the technical field of shale gas development. Background technique [0002] 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 flowback...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention 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 and difficult to maintain And other issues

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