Recycling treating device for flowback pressure liquid in shale gas well fracturing operation

A technology for shale gas wells and treatment devices, applied in water/sewage treatment, mining wastewater treatment, oxidized water/sewage treatment, etc., can solve water resource challenges and other issues, and achieve the effect of zero discharge

Active Publication Date: 2015-01-07
HAITIAN WATER GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to provide a reuse treatment device for flowback pressure fluid in the fracturing operation of shale gas wells, so that the effluent of the flowback pressure fluid after treatment can meet the water quality requirements of shale gas fracturing fluid reuse, and solve the problem of Water resource challenges brought about by rock gas development

Method used

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  • Recycling treating device for flowback pressure liquid in shale gas well fracturing operation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Such as figure 1As shown in the figure, a reuse treatment device for flowback pressure fluid in the fracturing operation of shale gas wells, including a wastewater tank 1, a regulating tank 2, a composite coagulation reaction device 3, a settling tank 5, a solid The liquid separation device 6 and the clear water tank 7, the composite coagulation reaction device 3 include a fast stirring tank 14, a slow stirring tank 15 and an oxidation tank 18 connected successively by pipelines, and the upper end of the regulating tank 2 passes through the first constant flow pump 13-1 and The regulator dosing device 12-1 is connected, the fast stirring tank 14 is connected with the flocculant dosing device 12-2 through the second constant flow pump 13-2, and the slow stirring tank 15 is connected with the assistant through the third constant flow pump 13-3. The coagulant dosing device 12-3 is connected, the oxidation tank 18 is connected with the oxidant dosing device 12-4 through the...

Embodiment 2

[0031] This embodiment is further limited on the basis of Example 1, the regulating pool 2 is connected to the fast stirring pool 14 through the first valve 9-1, and the regulating pool 2 is connected to the electroflocculation reaction device 4, The filter tank 20 is connected, and the filter tank 20 is connected with the fast stirring tank 14 and the settling tank 5 respectively, and a third valve 9-3 is provided between the filter tank 20 and the settling tank 5, and the suspended solids, The content of COD, heavy metal ions, etc. can be processed through electrocoagulation reaction, filtered, and then enter the composite coagulation reaction device 3, which can effectively reduce the content of suspended solids, COD, heavy metal ions, etc. in the flowback pressure liquid. Other structures of this embodiment are the same as those of Embodiment 1, and will not be repeated here.

Embodiment 3

[0033] This embodiment is further defined on the basis of the above embodiments, a first sampling port 8 - 1 , a first lift pump 10 - 1 and a flow meter 11 are sequentially provided between the waste water tank 1 and the regulating tank 2 . Through the setting of the first sampling port 8-1, it is mainly to sample the flowback pressure liquid in the waste water tank, and analyze its composition to determine the subsequent treatment process; through the setting of the first lift pump 10-1, Mainly through the first lifting pump 10-1, the flowback pressure liquid in the waste water pool is transported to the regulating tank 2 for processing, and the flow meter 11 can be set according to the processing capacity of the device in the flowback pressure liquid treatment process, within a unit time For the processing capacity of flowback pressure liquid; the second lift pump 10-2 and the fourth sampling port 8-4 are arranged between the settling tank 5 and the solid-liquid separation de...

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Abstract

The invention discloses a recycling treating device for flowback pressure liquid in shale gas well fracturing operation. The recycling treating device comprises a wastewater pool, a regulation pool, a composite coagulation reaction device, a settling pool, a solid-liquid separation device and a clean water pool which are sequentially connected to one another by virtue of a pipeline, wherein the composite coagulation reaction device consists of a rapid stirring pool, a slow stirring pool and an oxidation pool which are sequentially connected to one another by virtue of a pipeline, and the upper ends of the regulation pool, the rapid stirring pool, the slow stirring pool and the oxidation pool are all connected with a corresponding drug adding device by virtue of a constant-flow pump; the solid-liquid separation device consists of a crude filter and double-filtering equipment which are sequentially connected to one another by virtue of a pipeline, the crude filter is connected with a sludge pump by virtue of a fourth valve, the double-filtering equipment is also connected with the sludge pump, and the sludge pump is connected with a sludge dewatering machine. With the adoption of the recycling treating device, as the bottoms of the regulation pool, the rapid stirring pool, the slow stirring pool and the oxidation pool are all provided with stirrers, the problem of water resource challenge brought by shale gas development can be effectively solved, resource cyclic utilization is reached, and zero emission of flowback liquid caused by shale gas fracturing can be truly realized.

Description

technical field [0001] The invention belongs to the field of waste liquid treatment, and specifically refers to a reuse treatment device for flowback pressure liquid in fracturing operations of shale gas wells. Background technique [0002] Shale gas is an important unconventional energy source. In recent years, my country is in the upsurge of developing shale gas. In the "12th Five-Year Plan" for shale gas, the country clearly requires to promote the development of shale gas and other unconventional oil and gas resources. Utilize, increase the supply of natural gas resources, alleviate the contradiction between supply and demand of natural gas in my country, adjust the energy structure, and promote energy conservation and emission reduction. [0003] Compared with conventional natural gas, due to the lower permeability of shale formations, it is very difficult to develop. Therefore, hydraulic fracturing is the main means of developing shale gas, but the treatment of flowb...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04C02F9/06
CPCC02F1/5209C02F1/72C02F9/00C02F2101/20C02F2103/10C02F2201/002
Inventor 潘志成彭玉梅李慧强杨平邱恋费功全罗荣林李勇陈春阳杨开虎
Owner HAITIAN WATER GRP CO LTD
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