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CN-119954247-B - Air supporting device of oil gas field sewage treatment

CN119954247BCN 119954247 BCN119954247 BCN 119954247BCN-119954247-B

Abstract

The invention belongs to the technical field related to oil and gas field sewage treatment, and particularly discloses an air floatation device for oil and gas field sewage treatment, which comprises an air floatation tank, a suspended matter absorber and a filtering tank, wherein the suspended matter absorber is fixedly arranged near the wall of the air floatation tank, a plurality of cavities are arranged in the suspended matter absorber, a through hole is arranged on the bottom end surface of a piston, and an absorption hole is arranged at the bottom end position of each cavity on the side surface of the suspended matter absorber; the filter tank is arranged in the air floatation tank and near the top, a filter assembly is arranged in the air floatation tank, the filter assembly consists of a rotating shaft, two groups of filter screens and two groups of partition boards which are respectively connected with the rotating shaft, and two groups of end panels at two ends of the rotating shaft, and a sloping cam plate is also arranged at the top in the air floatation tank. The invention processes the scum through the filter tank, realizes the separation treatment of oil and solid pollutants, reduces the processing cost of recycling the subsequent oil, and absorbs and eliminates suspended matters through the absorber, thereby greatly reducing the content of suspended pollutants in the discharged water.

Inventors

  • NI CHAO
  • NI BAOFENG

Assignees

  • 东营天托能源科技有限公司

Dates

Publication Date
20260512
Application Date
20250114

Claims (5)

  1. 1. An air floatation device for sewage treatment of oil and gas fields comprises an air floatation tank (1), a suspended matter absorber (2) and a filter tank (3), wherein a driving device (11) is arranged at the top of the air floatation tank (1), the driving device (11) is connected with a driving shaft (13), the bottom end of the driving shaft (13) is connected with a pulsator (15), the pulsator (15) is positioned at the bottom of the air floatation tank (1) and is rotationally connected with the air floatation tank (1), and a micro-nano bubble generating device (16) is arranged below the pulsator (15) at the inner bottom of the air floatation tank (1); The suspended matter absorber (2) is of a vertical pipe structure, the suspended matter absorber (2) is fixedly arranged near the tank wall of the air floatation tank (1), a plurality of cavities (22) are arranged in the suspended matter absorber (2), adjacent cavities (22) are separated by pipe plugs (24), pistons (221) are arranged in the cavities (22), the pistons (221) in the adjacent cavities (22) are connected by pipes (222), the pipes (222) are communicated with the inside of the pistons (221), through holes are formed in the bottom end face of each piston (221), and absorption holes (223) are formed in the positions, located at the bottom end of each cavity (22), of the side face of the suspended matter absorber (2); The filter tank (3) is arranged near the top of the air floatation tank (1), the filter tank (3) is of a horizontal pipe body structure, the top surface of the filter tank is provided with a through groove, a filter assembly is arranged in the filter tank, the filter assembly consists of a rotating shaft (36), two groups of filter screens (35) and two groups of partition boards (34) which are respectively connected with the rotating shaft (36) and two groups of end plates at two ends of the rotating shaft (36), the two groups of end plates are respectively fixed at two ends of the filter tank (3), the rotating shaft (36) is rotationally connected with the end plates, and the two groups of filter screens (35) and the two groups of partition boards (34) are alternately arranged in sequence and are vertical to each other; the top in the air floatation tank (1) is also provided with a sloping cam plate (12), the sloping cam plate (12) is rotationally connected with the air floatation tank (1), the bottom end of the sloping cam plate (12) is movably connected with a connecting rod (14), the connecting rod (14) is connected to a connector (23) positioned at the top end of the suspended matter absorber (2), the connector (23) is connected with a piston (221) at the uppermost part, and the connecting rod (14) is provided with a rack structure (141) positioned at the position of a gear mechanism (37); A floatable baffle ring (2211) is arranged above the through hole in the piston (221); a sleeve (224) is arranged between the piston (221) and the suspended matter absorber (2), a hollow groove is formed in the side face of the sleeve (224), the hollow groove is composed of two sections of longitudinal grooves (2241) and two sections of spiral grooves (2242) in spiral direction, and the two sections of longitudinal grooves (2241) and the two sections of spiral grooves (2242) are connected end to end in sequence; A valve hole (2243) is arranged at the side surface of the bottom end of the sleeve (224) corresponding to the absorption hole (223); One end of the filter tank (3) is provided with a connecting port (33), the connecting port (33) is connected to a water outlet (21) through a pipeline (211), the water outlet (21) is arranged on the side surface of the top end of the suspended matter absorber (2), and the end panel of the filter component at the end is provided with a water passing hole (331); The filter tank (3) is provided with gear mechanism (37) in the one end of relative connector (33), gear mechanism (37) are connected on pivot (36), and filter component is provided with suspended solid export (321) in the bottom of this end, suspended solid export (321) are connected with suspended solid discharge tube (32), and filter component sets up oil outlet (311) on the end plate that is located this end, oil outlet (311) are connected with oil discharge tube (31).
  2. 2. An air flotation device for oil and gas field sewage treatment according to claim 1, wherein a separation cylinder (39) is connected between the filter screen (35) and the partition board (34).
  3. 3. An air flotation device for treating oil and gas field sewage according to claim 1 or 2, wherein the filter tank (3) is connected with an oil baffle plate (38) at one side of the through tank.
  4. 4. The floatation device for treating oil and gas field sewage according to claim 1, wherein the suspended matter absorber (2), the filtering tank (3) and the connecting rod (14) are arranged in an array.
  5. 5. An air flotation device for treating oil and gas field wastewater as set forth in claim 1 wherein there is rotational damping between said shaft (36) and said end plate.

Description

Air supporting device of oil gas field sewage treatment Technical Field The invention relates to the technical field related to oil and gas field sewage treatment, in particular to an air floatation device for oil and gas field sewage treatment. Background The oil-gas field production water contains more floating oil, suspended oil, solid particles, organic matters, heavy metals and other pollutants, and the emission standard can be achieved after the treatment. The physical methods such as gravity action and floatation are common methods for pre-pretreatment of the sewage of the oil and gas field, so that most suspended matters, oil and the like in the sewage can be removed, and other pollutants can be further removed by subsequent biochemical methods such as microbial degradation and the like. The floatation device is a main device for floatation, and forms scum after the generated micro bubbles are adsorbed and combined with suspended oil drops, flocculate and the like and float on the surface layer, and the scum is removed through scum scraping treatment, so that the separation of water and the scum is realized. The scum contains oil, light solid formed by the coalescence of a large amount of flocculates, hydrolysate of inorganic coagulant and the like, the content of recovered oil impurities and pollutants is very high due to the fact that the oil and other impurities are discharged together through scum scraping, the recovered oil impurities and pollutants are not easy to recycle or further purification treatment is needed to be beneficial to recycling economic benefit, in addition, part of solid impurities and impurities with heavier coalescence are limited due to the fact that the adhesion force of bubbles is limited, part of impurities cannot generate enough buoyancy to float on the surface to continue to be free in water, the existing floatation device is poor in effect on removing the part of impurities, and the content of pollutants in sewage discharged after floatation is still very high. Disclosure of Invention The invention aims to provide an air floatation device for oil and gas field sewage treatment, which solves the problems that the existing air floatation device provided in the background art can not separate and treat oil and gas field sewage scum and floating objects in water can not be removed by floatation. In order to achieve the above purpose, the present invention provides the following technical solutions: The air flotation device for the sewage treatment of the oil and gas field comprises an air flotation tank, a suspended matter absorber and a filter tank, wherein a driving device is arranged at the top of the air flotation tank and is connected with a driving shaft, the bottom end of the driving shaft is connected with a pulsator, the pulsator is positioned at the bottom of the air flotation tank and is rotationally connected with the air flotation tank, and a micro-nano bubble generating device is arranged at the bottom of the air flotation tank and below the pulsator; The suspended matter absorber is of a vertical pipe body structure, the suspended matter absorber is fixedly arranged at the position close to the tank wall of the air floatation tank, a plurality of cavities are formed in the suspended matter absorber, adjacent cavities are separated by pipe plugs, pistons are arranged in the cavities, the pistons in the adjacent cavities are connected by pipes, the pipes are communicated with the inside of the pistons, a through hole is formed in the bottom end face of each piston, and an absorption hole is formed in the bottom end position of each cavity, which is located on the side face of the suspended matter absorber; The filter tank is arranged in the air floatation tank and is close to the top, the filter tank is of a horizontal pipe body structure, the top surface of the filter tank is provided with a through groove, the inside of the filter tank is provided with a filter assembly, the filter assembly consists of a rotating shaft, two groups of filter screens and two groups of partition boards which are respectively connected with the rotating shaft, and two groups of end plates at two ends of the rotating shaft, the two groups of end plates are respectively fixed at two ends of the filter tank, and the rotating shaft is rotationally connected with the end plates; the top in the air supporting jar still is provided with the sloping cam plate, the sloping cam plate rotates with the air supporting jar to be connected, and sloping cam plate bottom swing joint has the connecting rod, the connecting rod is connected to the connector that is located suspended solid absorber top, the connector is connected with the piston at the top, and the connecting rod is provided with rack structure in the position department that is located gear mechanism. As a further scheme of the invention, a floatable baffle ring is arranged above the through hole in the piston. The invention furt