CN211896491U

CN211896491U - Zero-discharge treatment device for pressure return liquid

Info

Publication number: CN211896491U
Application number: CN202020298048.6U
Authority: CN
Inventors: 陈业钢; 李娟芬
Original assignee: Shanghai Denovo Environment Protection Co ltd
Current assignee: Shanghai Denovo Environment Protection Co ltd
Priority date: 2020-03-11
Filing date: 2020-03-11
Publication date: 2020-11-10
Anticipated expiration: 2030-03-11

Abstract

The utility model belongs to the technical field of wastewater treatment, and particularly discloses a pressure flow-back liquid zero-discharge treatment device, which comprises a wastewater tank, a sedimentation tank, a plate-and-frame filter press, an electric flocculation device, a molecular sieve device, an oxidation filtering device and an evaporation device; the waste liquid pool, the sedimentation tank, the plate-and-frame filter press, the electric flocculation equipment, the molecular sieve equipment, the oxidation filtering equipment and the evaporation equipment are sequentially communicated through pipelines; the oxidation filtering equipment comprises an ozone generator and a catalytic reactor; the ozone generator is communicated with the catalytic reactor, and the catalyst used in the catalytic reactor is activated carbon particles with manganese dioxide loaded on the surfaces; the utility model discloses use electric flocculation equipment, oxidation filtration equipment and evaporating equipment as the core, make the flowing back that produces after the fracturing construction can retrieve completely after handling, realize the purpose of zero release to cyclic utilization's effect has been strengthened.

Description

Zero-discharge treatment device for pressure return liquid

Technical Field

The utility model relates to a waste water drainage treatment technical field specifically is a flowing back zero release processing apparatus is returned to pressure.

Background

While shale gas development brings huge prospects for oil and gas resources and commercial benefits, a series of environmental problems are caused: ecological environment destruction, water resource challenge, environmental pollution and geological disasters. At present, water resource and environmental problems generated in shale gas development have become a focus of global attention.

The fracturing flowback fluid contains a plurality of chemical components such as a thickening agent, a cross-linking agent, a gel breaker, a buffering agent, a clay stabilizer, a bactericide, a cleanup additive and the like, so that the fracturing flowback fluid has the advantages of complex chemical components, high viscosity, high COD (chemical oxygen demand) and suspended matter content, and is a kind of oil field wastewater with great treatment difficulty. The fracturing flow-back fluid treatment scheme can be divided into three types, firstly, the fracturing flow-back fluid is transported to a combination station from a well site and is mixed with produced water for treatment, and the treatment modes are adopted up to now, but the impact on the normal treatment of the combination station is easily caused. And secondly, the fracturing flowback fluid is subjected to standard discharge treatment, the adopted methods comprise chemical flocculation, fenton reagent chemical oxidation, ozone catalytic oxidation, high-energy electrocoagulation, iron-carbon microelectrolysis, distillation treatment, membrane filtration, adsorption, biodegradation and the like, the methods are integrated into a process flow, the standard discharge of the fracturing flowback fluid is realized, and the treatment cost, equipment reliability, treatment scale and the like of the fracturing flowback fluid are difficult to meet the requirements of shale gas development fracturing fluid treatment. And thirdly, the fracturing flow-back fluid is recycled after being treated. Due to large water consumption in the development of shale gas hydraulic fracturing, the treated fracturing flow-back fluid can be used as a water source for preparing a fracturing fluid to replace surface water, and the effective measure for solving the shortage of water resources is realized.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a flowing back zero release processing apparatus is returned to pressure to solve the problem that proposes in the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme: a pressure flow-back liquid zero-discharge treatment device comprises a waste liquid pool, a sedimentation tank, a plate-and-frame filter press, an electric flocculation device, a molecular sieve device, an oxidation filtering device and an evaporation device; the waste liquid pool, the sedimentation tank, the plate-and-frame filter press, the electric flocculation equipment, the molecular sieve equipment, the oxidation filtering equipment and the evaporation equipment are sequentially communicated through pipelines.

Preferably, one side in the waste liquid pool is provided with a backflow liquid inlet pipeline, and the inner wall of the waste liquid pool is made of corrosion-resistant materials.

Preferably, the oxidation filtration device comprises an ozone generator and a catalytic reactor; the ozone generator is communicated with the catalytic reactor, and the catalyst used in the catalytic reactor is activated carbon particles with manganese dioxide loaded on the surface.

Preferably, the evaporation equipment is an MVR distiller; the MVR distiller comprises an evaporator, a heat exchanger, a compressor and a centrifuge.

Preferably, a viscosity removing agent is added into the plate-frame filter press.

Compared with the prior art, the beneficial effects of the utility model are that: the utility model discloses use electric flocculation equipment, oxidation filtration equipment and evaporating equipment as the core, make the flowing back that produces after the fracturing construction can retrieve completely after handling, realize the purpose of zero release to cyclic utilization's effect has been strengthened.

Drawings

FIG. 1 is a flow chart of a flow back fluid treatment apparatus;

fig. 2 is a schematic view of the overall structure of the present invention.

In the figure; 1. a waste liquid tank; 2. a sedimentation tank; 3. a plate-and-frame filter press; 4. an electrocoagulation device; 5. a molecular sieve device; 6. an oxidation filtration device; 7. evaporation apparatus

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "vertical", "upper", "lower", "horizontal", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

Referring to fig. 1-2, the present invention provides a technical solution: a pressure flow-back liquid zero-discharge treatment device comprises a waste liquid pool 1, a sedimentation tank 2, a plate-and-frame filter press 3, an electric flocculation device 4, a molecular sieve device 5, an oxidation filtering device 6 and an evaporation device 7; the waste liquid tank 1, the sedimentation tank 2, the plate-and-frame filter press 3, the electric flocculation equipment 4, the molecular sieve equipment 5, the oxidation filtration equipment 6 and the evaporation equipment 7 are sequentially communicated through pipelines.

Further, one side of the interior of the waste liquid tank 1 is provided with a backflow liquid inlet pipeline, and the inner wall of the waste liquid tank 1 is made of corrosion-resistant materials.

Further, the oxidation filtering device 6 comprises an ozone generator and a catalytic reactor; the ozone generator is communicated with the catalytic reactor, and the catalyst used in the catalytic reactor is activated carbon particles with manganese dioxide loaded on the surface.

Further, the evaporation equipment 7 is an MVR distiller; the MVR distiller comprises an evaporator, a heat exchanger, a compressor and a centrifuge.

Further, a viscosity reducing agent is added into the plate-and-frame filter press 3.

The working principle is as follows: the flowback liquid generated after fracturing construction enters a waste liquid tank 1 through a flowback liquid inlet pipeline, and enters a sedimentation tank 2 from the waste liquid tank 1 through a pipeline, the flowback liquid naturally sediments in the sedimentation tank 2 for a period of time, so that sand and soil in the flowback liquid are settled to the bottom end inside the sedimentation tank 2, then the flowback liquid in the sedimentation tank 2 is led into a plate and frame filter press 3 for filter pressing, so that solid-liquid separation in the flowback liquid is realized, the flowback liquid is led into an electric flocculation device 4 for flocculation and sedimentation after the filter pressing is finished, the electric flocculation device 4 comprises a power supply, an electric flocculation reactor, a filter and other parts, an anode and a cathode in the electric flocculation reactor can carry out electrolytic reaction on the flowback liquid, and a flocculating agent is added during electrolysis so that colloidal pollutants and suspended matters in the flowback liquid lose stability under the action of the flocculating agent, macroscopic large flocs are generated after destabilization, so that separation is realized, then, introducing the flowback liquid into a molecular sieve device 5, wherein a large number of micropores are formed in the molecular sieve device 5, the flowback liquid can be adsorbed and filtered, so that large flocs and the flowback liquid are separated, then introducing the flowback liquid into an oxidation and filtration device 6, the oxidation and filtration device 6 comprises an ozone generator and a catalytic reactor, ozone is generated by the ozone generator so as to oxidize the flowback liquid, a catalyst used in the catalytic generator is active carbon particles with manganese dioxide attached to the surfaces, the catalytic activity of the active carbon particles can be improved, finally, the flowback liquid is introduced into an evaporation device 7, the evaporation device 7 is an MVR distiller, the MVR distiller can remove heavy metal ions in the flowback liquid, and finally, the rest liquid is recovered.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a pressure returns flowing back zero release processing apparatus which characterized in that: comprises a waste liquid pool (1), a sedimentation pool (2), a plate-and-frame filter press (3), an electric flocculation device (4), a molecular sieve device (5), an oxidation filtering device (6) and an evaporation device (7); the waste liquid pool (1), the sedimentation pool (2), the plate-and-frame filter press (3), the electric flocculation equipment (4), the molecular sieve equipment (5), the oxidation filtration equipment (6) and the evaporation equipment (7) are communicated in sequence through pipelines.

2. The pressure flow-back liquid zero-emission treatment device according to claim 1, characterized in that: the waste liquid tank (1) is characterized in that a backflow liquid inlet pipeline is arranged on one side inside the waste liquid tank (1), and the inner wall of the waste liquid tank (1) is made of corrosion-resistant materials.

3. The pressure flow-back liquid zero-emission treatment device according to claim 1, characterized in that: the oxidation filtering equipment (6) comprises an ozone generator and a catalytic reactor; the ozone generator is communicated with the catalytic reactor, and the catalyst used in the catalytic reactor is activated carbon particles with manganese dioxide loaded on the surface.

4. The pressure flow-back liquid zero-emission treatment device according to claim 1, characterized in that: the evaporation equipment (7) is an MVR distiller; the MVR distiller comprises an evaporator, a heat exchanger, a compressor and a centrifuge.

5. The pressure flow-back liquid zero-emission treatment device according to claim 1, characterized in that: and a viscosity removing agent is added into the plate-and-frame filter press (3).