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CN-224226765-U - Fracturing flow-back fluid treatment device based on electrochemical method

CN224226765UCN 224226765 UCN224226765 UCN 224226765UCN-224226765-U

Abstract

The utility model relates to a fracturing flow-back fluid treatment device based on an electrochemical method, and relates to the technical field of sewage treatment in petrochemical industry. The fracturing flow-back fluid treatment device comprises an electrochemical electrification demulsification reaction tank, an electrochemical flocculation reaction tank and a mud-water separation tank, wherein the outflow end of the electrochemical electrification demulsification reaction tank is connected with the inflow end of the electrochemical flocculation reaction tank, and the outflow end of the electrochemical flocculation reaction tank is connected with the inflow end of the mud-water separation tank. The fracturing flowback fluid treatment device has the advantages of short treatment process flow, simple operation management, low treatment cost and more than 50% lower operation cost than the existing treatment process under the same water quality condition.

Inventors

  • KANG AOJIE
  • LV YANHUI

Assignees

  • 四川湘实科技有限公司

Dates

Publication Date
20260512
Application Date
20250516

Claims (10)

  1. 1. The fracturing flow-back fluid treatment device based on the electrochemical method is characterized by comprising an electrochemical electrification demulsification reaction tank (1), an electrochemical flocculation reaction tank (2) and a mud-water separation tank (3); The outflow end of the electrochemical electrification demulsification reaction tank (1) is connected with the inflow end of the electrochemical flocculation reaction tank (2), and the outflow end of the electrochemical flocculation reaction tank (2) is connected with the inflow end of the mud-water separation tank (3).
  2. 2. The fracturing flow-back fluid treatment device based on the electrochemical method according to claim 1, wherein the electrochemical electrification demulsification reaction tank (1) comprises a water inlet pipe (4), a first water inlet baffle plate (101), an electrochemical inert split polar plate (103), a first electrochemical inert main polar plate (102) and a second electrochemical inert main polar plate (104); The side wall of the electrochemical electrification demulsification reaction tank (1) is provided with the water inlet pipe (4), and the first water inlet baffle (101), the first electrochemical inert main pole plate (102), the electrochemical inert sub pole plate (103) and the second electrochemical inert main pole plate (104) are sequentially arranged in the electrochemical electrification demulsification reaction tank (1) from one side close to the water inlet pipe (4).
  3. 3. The fracturing flow-back fluid treatment device based on the electrochemical method, which is disclosed by the claim 1, is characterized in that a slag chute (8) is arranged at the top end of the separated side wall of the electrochemical electrification demulsification reaction tank (1) and the top end of the separated side wall of the electrochemical flocculation reaction tank (2), a slag discharge port (9) is arranged at the bottom end of the slag chute (8), and a first slag scraper (6) and a second slag scraper (7) are respectively arranged at the top end of the inner side wall of the slag chute (8).
  4. 4. The fracturing flow-back fluid treatment device based on the electrochemical method according to claim 2, characterized in that the electrochemical electrification demulsification reaction tank (1) is provided with a first separation plate (106) and a second separation plate (107), the first separation plate (106) and the second separation plate (107) are inclined to the horizontal plane, the lower edges of the first separation plate (106) and the second separation plate (107) are respectively connected with the bottom wall corresponding to the electrochemical electrification demulsification reaction tank (1), the upper edges of the first separation plate (106) and the second separation plate (107) are respectively connected with the inner side wall corresponding to the electrochemical electrification demulsification reaction tank (1), and the bottom of the electrochemical electrification demulsification reaction tank (1) is provided with a first sludge discharge port (105).
  5. 5. The fracturing flow-back fluid treatment device based on the electrochemical method according to claim 1, wherein the electrochemical flocculation reaction tank (2) comprises a second water inlet baffle plate (207), an electrochemical flocculation separation plate (202), a first electrochemical flocculation main plate (201) and a second electrochemical flocculation main plate (203); The second water inlet baffle (207), the first electrochemical flocculation main pole plate (201), the electrochemical flocculation sub pole plate (202) and the second electrochemical flocculation main pole plate (203) are sequentially arranged in the electrochemical flocculation reaction tank (2) from one side close to the electrochemical electrification demulsification reaction tank (1).
  6. 6. The fracturing flow-back fluid treatment device based on an electrochemical method according to claim 1, characterized in that the sludge-water separation tank (3) is provided with a fifth separation plate (302) and a sixth separation plate (303), the fifth separation plate (302) and the sixth separation plate (303) are inclined to the horizontal plane, the lower edges of the fifth separation plate (302) and the sixth separation plate (303) are connected with the bottom of the sludge-water separation tank (3), the upper edges of the fifth separation plate (302) and the sixth separation plate (303) are connected with the inner side wall of the sludge-water separation tank (3), and the bottom of the sludge-water separation tank (3) is provided with a third sludge discharge port (301).
  7. 7. An electrochemical-based fracturing flow-back fluid treatment device according to claim 5, characterized in that the electrochemical flocculation reaction tank (2) is provided with a third separation plate (205) and a fourth separation plate (206), the third separation plate (205) and the fourth separation plate (206) are inclined to the horizontal plane, and the lower edges of the third separation plate (205) and the fourth separation plate (206) are joined with the bottom of the electrochemical flocculation reaction tank (2), and the upper edges of the third separation plate (205) and the fourth separation plate (206) are joined with the inner side wall of the electrochemical flocculation reaction tank (2), and the bottom of the electrochemical flocculation reaction tank (2) is provided with a second sludge outlet (204).
  8. 8. The fracturing flow-back fluid treatment device based on the electrochemical method according to claim 1, wherein an electrochemical reaction water outlet tank (10) is arranged at the upper end of the inner side wall of the mud-water separation tank (3) close to the side of the electrochemical flocculation reaction tank (2), and a stirrer (11) is arranged in the electrochemical reaction water outlet tank (10).
  9. 9. The fracturing flow-back fluid treatment device based on the electrochemical method according to claim 1, wherein a cleaning air pipe (5) is arranged at the lower parts of the electrochemical electrification demulsification reaction tank (1) and the electrochemical flocculation reaction tank (2).
  10. 10. The fracturing flow-back fluid treatment device based on the electrochemical method, which is disclosed by claim 6, is characterized in that a sedimentation zone water outlet tank (12) is arranged at the upper end of the side wall of the mud-water separation tank (3) far away from the side of the electrochemical flocculation reaction tank (2), and the sedimentation zone water outlet tank (12) is connected with a water outlet.

Description

Fracturing flow-back fluid treatment device based on electrochemical method Technical Field The utility model relates to a fracturing flow-back fluid treatment device based on an electrochemical method, and relates to the technical field of sewage treatment in petrochemical industry. Background The fracturing flowback fluid has high salt content, high organic matter content and complex composition, the water quality can change along with the development process, and the fracturing flowback fluid with different blocks has huge water quality difference. The prior treatment technology comprises the steps of buffering, sedimentation separation and oil removal and filtering, wherein the differences of the technologies are that the sedimentation separation and oil removal adopts different modes, and mainly comprise a gravity coagulation sedimentation oil removal technology, a pressure inclined plate tank airtight oil removal technology, a rotational flow oil removal technology, a pressure filtering technology, a low permeability oilfield fine water treatment technology, a water quality modification treatment technology and the like. The existing oil removal process has the defects that (1) due to high salinity and complex organic matter components in fracturing flowback fluid, large dosage and high cost of demulsification, and the treatment cost of 50-150 yuan/ton water is different, (2) different development processes and large water quality difference of different blocks, the types and the addition amount of the medicaments need to be continuously adjusted, the actual workload is large, the operation and running difficulty is high, and (3) due to large addition amount of the medicaments, large sludge amount and high sludge-water separation difficulty, the size and the cost of sludge-water separation equipment are large, and the treatment cost of the sludge is high. Disclosure of utility model In order to solve the technical problems, the utility model aims to provide the fracturing flow-back fluid treatment device based on the electrochemical method, which solves the problems of large dosage of medicament, large workload and high cost of the existing oil removal process, and has the advantages of short process flow, simple operation management, low treatment cost and more than 50 percent lower operation cost than the existing treatment process under the same water quality condition. The technical scheme for solving the technical problems is as follows: The utility model aims to provide a fracturing flow-back fluid treatment device based on an electrochemical method, which comprises an electrochemical electrification demulsification reaction tank, an electrochemical flocculation reaction tank and a mud-water separation tank; The outflow end of the electrochemical electrification demulsification reaction tank is connected with the inflow end of the electrochemical flocculation reaction tank, and the outflow end of the electrochemical flocculation reaction tank is connected with the inflow end of the mud-water separation tank. The utility model has the advantages that (1) the electrochemical electrokinetic demulsification reaction tank and the electrochemical flocculation reaction tank are used for treating the fracturing flowback fluid by adopting an electrochemical method, the utility model can be flexibly suitable for huge difference of the quality of the fracturing flowback fluid, the output current and the voltage can be adjusted according to the difference of the quality of the water, the operation is simple, (2) the electrochemical electrokinetic demulsification reaction tank is used for demulsification and separating the grease in the fracturing flowback fluid to obtain the fracturing flowback fluid after the grease is removed, the fracturing flowback fluid is discharged into the electrochemical flocculation reaction tank for flocculating the pollutant in the fracturing flowback fluid after the grease is removed to obtain electric flocculation effluent, and finally the mud-water separation tank is used for separating the electric flocculation effluent to obtain the supernatant and the sludge reaching standards. The utility model has the advantages of short process flow, simple operation management, low treatment cost and more than 50 percent lower operation cost than the existing treatment process under the same water quality condition. Further, the electrochemical electrification demulsification reaction tank comprises a water inlet pipe, a first water inlet baffle, an electrochemical inert separation plate, a first electrochemical inert main plate and a second electrochemical inert main plate; one end of the electrochemical electrification demulsification reaction tank is provided with the water inlet pipe, and the first water inlet baffle, the first electrochemical inert main pole plate, the electrochemical inert sub-pole plate and the second electrochemical inert main pole plate are sequentially arrang