[0018] The present invention will be described in detail below with reference to the drawings and specific embodiments.
[0019] The present invention is an oil field produced water treatment device, such as figure 1 As shown, it includes a dosing device 1, a cyclone separator 2, an air flotation device 3, an oil-water separation filter 5, and a sintered tube fine filter 4, which are sequentially connected by pipelines.
[0020] It also includes a gas source system, which is connected to the sintered tube fine filter 4 and the oil-water separation filter 5 through pipelines. The gas source system provides a power source for the pneumatic valve system.
[0021] It also includes a container 16, which is insulated to adapt to cold and harsh conditions; dosing device 1, cyclone separator 2, air flotation device 3, sintered tube fine filter 4, oil-water separation filter 5 The air compressor 6 and the gas storage tank 7 are all installed on the base of the container 16. The container 16 is also equipped with a control cabinet 17, a dosing device 1, a cyclone separator 2, an air floatation device 3, and a sintered tube fine filter The device 4, the oil-water separation filter 5, the air compressor 6 and the gas storage tank 7 are all connected to the control cabinet 17, and the control system monitors the operating status of the entire device in real time and makes corresponding adjustments to achieve fully automated operation.
[0022] The gas source system includes an air compressor 6 and a gas storage tank 7 connected by pipelines in sequence, and the gas storage tank 7 is connected to a sintered tube fine filter 4 and an oil-water separation filter 5 respectively. The pipeline between the air compressor 6 and the gas storage tank 7 is provided with a valve a, and the pipeline between the gas storage tank 7 and the sintered tube fine filter 4 is provided with a valve b. A valve c1 is provided on the pipeline between the valve and the oil-water separation filter 5 is provided with a valve c2, and the sintered tube fine filter 4 and the oil-water separation filter 5 are provided with a valve d on the pipeline.
[0023] A water tank 8 is arranged between the air flotation device 3 and the oil-water separation filter 5, and the air flotation device 3, the water tank 8 and the oil-water separation filter 5 are connected by pipelines, and the water treated by the air flotation device 3 enters the water tank 8 for buffering; The pipeline between the dosing device 1 and the cyclone separator 2 is provided with a valve e, the pipeline between the cyclonic separator 2 and the air flotation device 3 is provided with a valve f, and the pipeline between the air floatation device 3 and the water tank 8 is provided. A valve g is provided.
[0024] The inlet of the dosing device 1 is connected with a water inlet pipe a9, the water inlet pipe a9 is provided with a lifting pump a10, the pipeline between the lifting pump a10 and the water inlet is provided with a valve h1, and the pipe between the lifting pump a10 and the dosing device 1 A valve h2 is installed on the road, and a valve h3 is installed on the pipeline between the valve h2 and the dosing device 1. The water inlet pipe a9 is also connected to the sintered pipe fine filter 4 and the oil-water separation filter 5 respectively, and the water inlet pipe a9 is connected to the sintered pipe fine The pipeline between the filters 4 is provided with a valve i1, and the pipeline between the water inlet pipe a9 and the oil-water separation filter 5 is provided with a valve i2, and the clean water enters the oil-water separation filter 5 and the sintered tube fine filter from the inlet pipe a9. 4; The outlet of the dosing device 1 is also connected to the water inlet pipe a9 through a pipeline. The pipeline between the outlet of the dosing device 1 and the water inlet pipe a9 is provided with a valve i3, and the clean water treated by the dosing device 1 passes through the inlet The water pipe a9 enters the oil-water separation filter 5 and the sintered tube fine filter 4 respectively;
[0025] The inlet of the cyclone separator 2 is connected with a water inlet pipe b11, the water inlet pipe b11 is provided with a lifting pump b12, the pipeline between the lifting pump b12 and the water inlet is provided with a valve j1, between the lifting pump b12 and the cyclone separator 2 A valve j2 is provided, and the raw water enters the cyclone separator 2 from the water inlet pipe b11; a lifting pump c13 is provided between the water tank 8 and the oil-water separation filter 5, and a valve k1 is provided between the lifting pump c13 and the water tank 8, and the lifting pump c13 and A valve k2 is provided between the oil-water separation filter 5.
[0026] The outlet of the oil-water separation filter 5 is connected to the sewage outlet pipe a14, the dosing device 1, the air flotation device 3, the water tank 8 and the sintered tube fine filter 4 are all connected to the outlet pipe a14 through the pipeline, and the oil-water separation filter A valve l1 is provided on the pipeline between 5 and the outlet pipe a14, a valve 12 is provided on the pipeline between the dosing device 1 and the outlet pipe a14, and a valve is provided on the pipeline between the cyclone separator 2 and the outlet pipe a14 l3, the pipeline between the air flotation device 3 and the outlet pipe a14 is provided with a valve l4, the pipeline between the water tank 8 and the outlet pipe a14 is provided with a valve l5, the sintered tube fine filter 4 and the outlet pipe a14 are provided There is a valve l6 on the road; the outlet of the sintered tube fine filter 4 is also connected with a filtered water outlet pipe b15, and the pipeline between the sintered tube fine filter 4 and the outlet pipe b15 is provided with a valve m, and the filtered water is discharged from the outlet. The water pipe b15 discharges the water outlet.
[0027] The working process of an oil field produced water treatment device of the present invention is as follows:
[0028] When working, first make sure that all valves in the system are closed, and configure corresponding agents in the liquid storage tank of the dosing device 1 as needed, including flocculants, coagulants, and bactericides. After the system is started, the air source system begins to prepare, open the valve, start the air compressor 6 to inflate the air tank 7, and provide a power source for the valve system. After the inflation is finished, start the operation formally, open valve j1, valve j2, valve f, valve g, valve l4 and valve l3 in sequence, start the lift pump b12, open valve e after the water intake is normal, start the dosing device 1 and add to the water inlet pipe b11 After being thoroughly mixed, the medicine enters the cyclone separator 2 for preliminary degreasing to control the oil content. After filtering, the water enters the air flotation device 3, and most of the suspended matter and oil are discharged through the water outlet pipe a14, and then the air flotation The water treated by the device 3 enters the water tank 8 for buffering. After the liquid level in the water tank 8 meets the requirements, open the valve k1, valve k2, valve d, valve m and valve n, start the lift pump c13, and send the water in the water tank 8 The oil-in-water separation filter 5 reduces the oil content and meets the standard requirements, and then enters the sintered tube fine filter 4 for final fine filtration to ensure that the water quality at the outlet meets the A1 standard or the external discharge standard in SY/T5329-2012.
[0029] When performing the backwash procedure, first close all the valves in normal operation (except the valves at the sewage outlet), open valve i2, valve l1 and valve l6 or open valve h1, valve h2 and valve i1, and start lift pump a10 , Perform backwashing on the sintered tube fine filter 4 and the oil-water separation filter 5 respectively. If you want to further enhance the backwashing effect, you can open valve b and valve c1 or valve b and valve c2, and use compressed air to reverse the above filter Blow and backwash with air and water. Or start the dosing device 1 to backwash the above-mentioned filter with dosing. After backwashing, the system resumes its processing capacity, and the system restarts operation. According to a reasonable backwash procedure, the service life of the filter material can be guaranteed for 1 to 2 years.
[0030] Through the above methods, the oilfield produced water treatment system of the present invention can make the filtered water quality reach the A1 standard or efflux standard in SY/T5329-2012, and can meet the water quality requirements of low permeability oilfield reinjection water; the oilfield produced water of the present invention The treatment system adopts physical and chemical treatment methods. Compared with the microbiological method, it has a faster commissioning speed and can quickly obtain stable production capacity without the need for microbial cultivation and stabilization; the oilfield produced water treatment system of the present invention can adapt to larger The raw water quality fluctuates, the processing accuracy is high, and the processing effect is guaranteed; the oilfield produced water treatment system of the present invention adopts a skid-mounted design, all equipment and facilities are compactly arranged and fixed on the base, which is convenient for transportation, and can realize rapid connection and rapid operation. It can be reused and save costs; it can solve the problem of produced water treatment before the station is built, or replace the fixed station in charge of regional produced water treatment tasks.
