CN207581565U - A kind of oil field higher suspension water treatment system - Google Patents

Abstract

The utility model discloses an oil field high suspension water treatment system, which comprises a free water separator (1), a qualified oil heat exchanger (2), a water buffer cabin (3), and the upper and lower parts of the qualified oil heat exchanger (2). Port C and port D are respectively provided at the ends, and port C and port D are connected through pipes, and the left and right ends of the qualified oil heat exchanger (2) are respectively provided with port A and port B, and port A and port B are connected through pipes, Port B is connected in sequence with a crude oil thermal processor (4), booster pump A (5), electric dehydration pre-heater (6) and electric dehydrator (7). The beneficial effect of the utility model is that the structure is compact, the treatment effect is good, the separation of oil and water can be realized, and the process steps are few.

Description

An Oilfield High Suspension Water Treatment System

technical field

The utility model relates to the technical field of oil field high suspension water treatment, in particular to an oil field high suspension water treatment system.

Background technique

Oilfield sewage mainly includes crude oil produced water (also known as oilfield produced water), drilling sewage and other types of oily sewage in stations. There are many ways to treat oilfield sewage according to factors such as oilfield production and environment. Due to its particularity, offshore oilfields have many difficulties in the process of oilfield sewage treatment, such as cost, site, environmental protection requirements, etc., especially for offshore oilfields with sewage discharge and reinjection, to ensure that the treated sewage meets Discharge standards and reinjection standards, there are certain difficulties.

At present, under normal production conditions, the oilfield treatment center needs to ensure that the crude oil treatment is qualified to meet the requirements of oil products for export (water content < 0.5%), and at the same time, it needs to meet the sewage treatment requirements (currently the oil content in the treated water is required to be within 10mg/l on average) , in order to comply with the discharge water and reinjection water quality regulations. However, with the production of oilfields, sewage containing high-concentration suspended solids (hereinafter referred to as high-suspended water) that is difficult to treat will gradually be produced in the oilfield tank. The use of a variety of chemical agents leads to a high degree of emulsification. It is very difficult to use the original sewage treatment equipment in the oilfield to achieve oil-water separation and meet the "Discharge Standards for Oily Wastewater in Offshore Oil Development Industry" and reinjection standards.

In addition, with the commissioning of the oilfield comprehensive adjustment project, the process troubles caused by the problem of high-hanging water treatment have become increasingly apparent, which has seriously affected the normal oil-water treatment and export operations.

Utility model content

The purpose of the utility model is to overcome the disadvantages of the prior art and provide an oilfield high-suspension water treatment system with compact structure, good treatment effect, oil-water separation and few process steps.

The purpose of this utility model is achieved through the following technical solutions: a high-suspension water treatment system in an oil field, which includes a free water separator, a qualified oil heat exchanger, and a water buffer cabin, and the upper and lower ends of the qualified oil heat exchanger are respectively Port C and port D are provided, and port C and port D are connected by pipes. The left and right ends of the qualified oil heat exchanger are respectively provided with port A and port B. Port A and port B are connected by pipes. The crude oil heat processor, booster pump A, electric pre-heater and electric dehydrator are connected for the second time. The bottom of the electric pre-heater is provided with an oily sewage outlet, and the oily sewage outlet is connected with the water buffer tank. The electric pre-heater The top of the tank is provided with an exhaust port I, and the combustion tank is connected to the exhaust port I, and the qualified oil outlet of the electric dehydrator is connected to port C, and the port A is connected to the water-containing crude oil outlet end of the free water separator, and the free water is separated The top of the separator is provided with an exhaust port II, and the bottom of the free water separator is provided with an oily sewage outlet, which is connected to the water buffer tank, and the outlet of the water buffer tank is connected with a booster pump B and a sloping plate removal tank in sequence. oiler, air flotation unit, booster pump C and walnut shell filter.

A gas compressor is sequentially connected to the exhaust port II.

The gas compressor is connected with the combustion tank.

The port D is connected to a cargo oil tank.

The utility model has the following advantages: the utility model has compact structure, good treatment effect, can realize oil-water separation, and has few process steps.

Description of drawings

Fig. 1 is the structural representation of the utility model;

In the figure, 1-free water separator, 2-qualified oil heat exchanger, 3-water buffer tank, 4-crude oil heat processor, 5-boosting pump A, 6-electric preheater, 7-electric dehydrator , 8-pressurization pump B, 9-slope plate oil remover, 10-gas flotation device, 11-pressurization pump C, 12-walnut shell filter, 13-gas compressor, 14-combustion tank.

Detailed ways

Below in conjunction with accompanying drawing, the utility model is further described, and the protection scope of the utility model is not limited to the following:

As shown in Figure 1, a kind of oil field high suspension water treatment system, it comprises free water separator 1, qualified oil heat exchanger 2, water buffer cabin 3, the upper and lower ends of described qualified oil heat exchanger 2 are respectively provided with Port C and port D, port C and port D are connected through pipelines, the left and right ends of the qualified oil heat exchanger 2 are respectively provided with port A and port B, port A and port B are connected through pipelines, and the ports at B are sequentially Connected with crude oil heat processor 4, pressurization pump A5, electric pre-heater 6 and electric dehydrator 7, the bottom of electric pre-heater 6 is provided with oily sewage outlet, the oily sewage outlet is connected with water buffer cabin 3, electric The top of the pre-heater 6 is provided with an exhaust port 1, and the exhaust port 1 is connected with a combustion tank 14, and the qualified oil outlet of the electric dehydrator 7 is connected with the port C. Cargo tank is connected at port D

As shown in Figure 1, the port A is connected to the water-containing crude oil outlet end of the free water separator 1, the top of the free water separator 1 is provided with an exhaust port II, and the bottom of the free water separator 1 is provided with an oily sewage outlet, The oily sewage outlet is connected to the water buffer cabin 3, and the outlet of the water buffer cabin 3 is connected with a booster pump B8, an inclined plate degreaser 9, an air flotation device 10, a booster pump C11 and a walnut shell filter 12. A gas compressor 13 is sequentially connected to the exhaust port II, and the gas compressor 13 is connected to a combustion tank 14 .

The working process of the utility model is as follows: the sewage containing high-concentration suspended solids in the oil field tank is pumped into the free water separator 1, and the free water separator 1 separates water-containing crude oil, oil-containing sewage and gas, wherein the gas is pumped by the gas compressor 13 After being compressed, it enters the combustion tank 14 for combustion, and the oily sewage enters the water buffer tank 3 for collection. The watery crude oil flows out from the port B after passing through the port A, and then enters the crude oil heat processor 4 after flowing out; the crude oil heat processor 4 heats the watery crude oil to 75~93 ℃, the crude oil thermal processor 4 separates water-containing crude oil, oil-containing sewage and gas, wherein the gas enters the combustion tank 14 for combustion, and the oil-containing sewage enters the water buffer tank 3 for collection, and the separated water-containing crude oil is pumped into the electric degasser through the booster pump A5. In the pre-heater 6, the electric pre-heater 6 heats the water-containing crude oil to 100~125°C, and enters the electric dehydrator 7 after heating. The qualified crude oil separated by the electric dehydrator 7 enters the qualified crude oil through port C. In the heat exchanger 2, the qualified crude oil is subjected to heat exchange with the water-containing crude oil separated from the free water separator 1. After the heat exchange, the product enters the cargo oil tank through port D, and the oil is transported from the cargo oil tank to the outside; the water buffer tank The oily sewage in 3 is pumped into the inclined plate degreaser 9 through the booster pump B8, and the inclined plate degreaser 9 separates the larger particles in the sewage from the water, and the treated oily sewage is discharged under the action of pressure difference. Sent to the air flotation device 10, the air flotation device 10 removes the emulsified oil and smaller suspended particles in the sewage by the air flotation method, and after treatment, it is pumped into the walnut shell filter 12 by the booster pump C11 Among them, the walnut shell filter 12 filters out suspended solid particles above 4 microns in the sewage, and finally obtains water with an oil content of less than 7-15ppm, which meets the sewage discharge standard, realizes the separation of oil and water, and solves the problem of difficult treatment of high suspended water , Promote the normal operation of oil and water treatment and export operations.

Claims (4)

1. a kind of oil field higher suspension water treatment system, it is characterised in that：It includes free water separator（1）, qualified oil heat exchanger （2）, water buffering cabin（3）, the qualification oil heat exchanger（2）Upper and lower end parts be respectively arranged with port C and port D, port C and end Mouth D is connected by pipeline, qualified oil heat exchanger（2）Left and right end portions be respectively arranged with port A and port B, port A and port B It is connected by pipeline, crude oil annealer has been sequentially connected at the port B（4）, force (forcing) pump A（5）, the de- pre-heater of electricity（6） And electric dehydrator（7）, the de- pre-heater of electricity（6）Bottom be provided with oily wastewater outlet, the oily wastewater outlet with water buffer Cabin（3）Connection, the de- pre-heater of electricity（6）Top be provided with exhaust outlet I, be connected with burn pot at exhaust outlet I（14）, electric dehydration Device（7）Qualified oil export connect with port C, the port A and free water separator（1）The wet crude port of export connection, Free water separator（1）Top be provided with exhaust outlet II, free water separator（1）Bottom be provided with oily wastewater outlet, The oily wastewater is exported buffers cabin with water（3）Connection, water buffering cabin（3）Exit be sequentially connected with force (forcing) pump B（8）, inclined plate Oil expeller（9）, induced gas floatator（10）, force (forcing) pump C（11）And walnut shell filter（12）.

2. a kind of oil field higher suspension water treatment system according to claim 1, it is characterised in that：At the exhaust outlet II It has been sequentially connected with combustion gas compressor reducer（13）.

3. a kind of oil field higher suspension water treatment system according to claim 2, it is characterised in that：The combustion gas compressor reducer （13）With burn pot（14）Connection.

4. a kind of oil field higher suspension water treatment system according to claim 1, it is characterised in that：It is connected at the port D There is oil cargo tank.