CN216662800U

CN216662800U - Oily sludge treatment device

Info

Publication number: CN216662800U
Application number: CN202220141517.2U
Authority: CN
Inventors: 张帅; 齐建卿; 徐非; 刘辉; 胡兆亮; 张小倩; 王博闻; 梁明远
Original assignee: BMEI Co Ltd
Current assignee: BMEI Co Ltd
Priority date: 2022-01-19
Filing date: 2022-01-19
Publication date: 2022-06-03
Anticipated expiration: 2032-01-19

Abstract

The utility model discloses an oily sludge treatment device, which comprises: the centrifugal machines are provided with multiple stages, and the multiple stages of centrifugal machines are sequentially connected in series; the inlet end of the advanced oxidation device is connected with the outlet end of the heat exchange tank, and the outlet end of the advanced oxidation device is connected with the inlet end of the first-stage centrifugal machine; and the inlet end of the sewage treatment system is connected with the outlet ends of the multistage centrifuges, and the outlet end of the sewage treatment system is connected with the inlet end of the heat exchange tank. The utility model has the beneficial effects that: the oily sludge is deeply oxidized by the advanced oxidation device, so that oil in the oily sludge can be fully released; the oil component fully released can be thoroughly separated by combining the use of a multi-stage centrifuge.

Description

Oily sludge treatment device

Technical Field

The utility model relates to the technical field of sludge treatment, in particular to an oil-containing sludge treatment device.

Background

Oily sludge is soil mixed with oil. The oil and the water are not compatible, but the oil, the water and the sludge are mixed together due to the mixing of the soil, and the oil sludge, the water and the sludge form an extremely difficult oil sludge after mixing. The oil field can generate a certain amount of oily sludge in the oil and gas production process, and the oil and gas production process mainly comprises the following two aspects: firstly, crude oil is carried to the ground from the stratum, and sludge which is required to be cleaned regularly is deposited in ground facilities such as various containers, large tanks, recovery pools and the like; the second is the ground sludge produced by oil well operation, oil gathering and transportation pipeline perforation and oil stealing.

The oil field oily sludge has very complicated physical and chemical properties, and generally has the characteristics of high oil content, high viscosity, difficult dehydration and the like. The oily sludge belongs to a multiphase system and generally consists of oil-in-water, oil-in-water and suspended solids, the suspended solids and colloid particles in the sludge are fully emulsified with the oil and the water to form an extremely stable suspended emulsion system, the viscosity is high, the flowability is poor, and the sedimentation is difficult.

The existing treatment method of the oily sludge mainly comprises pretreatment filtration and solid-liquid separation or incineration. However, in practical application, the method cannot completely separate oil from water, and oil resources cannot be effectively recycled.

SUMMERY OF THE UTILITY MODEL

In order to solve the problems that the oil-water separation of the oily sludge is not thorough and the oil resource can not be effectively recovered, the utility model aims to provide an oily sludge treatment device.

The utility model provides an oily sludge treatment device, which comprises:

the centrifugal machines are provided with multiple stages, and the multiple stages of centrifugal machines are sequentially connected in series;

the inlet end of the advanced oxidation device is connected with the outlet end of the heat exchange tank, and the outlet end of the advanced oxidation device is connected with the inlet end of the first-stage centrifugal machine;

and the inlet end of the sewage treatment system is connected with the outlet ends of the multi-stage centrifuges, and the outlet end of the sewage treatment system is connected with the inlet end of the heat exchange tank.

As a further improvement of the utility model, the device also comprises a storage pool which is connected with the inlet end of the heat exchange tank through a lifting pump.

As a further improvement of the utility model, the device also comprises a dosing tank which is connected with the heat exchange tank through a metering pump.

As a further development of the utility model, the multi-stage centrifuge consists of a three-phase centrifuge and/or a three-leg centrifuge.

As a further improvement of the utility model, the device also comprises an oil storage tank which is connected with oil outlets of the multi-stage centrifugal machine, and a crude oil area and a pure oil area are arranged inside the oil storage tank.

As a further improvement of the utility model, a grid filtering device is arranged in the storage tank.

As a further improvement of the utility model, an alkali liquor area and a demulsifier area are arranged in the dosing tank.

As a further improvement of the utility model, a stirring device is arranged in the heat exchange tank.

As a further improvement of the utility model, the temperature in the heat exchange tank is 70 +/-5 ℃.

As a further improvement of the utility model, the advanced oxidation device comprises an ozone generator, an ultrasonic vibrating rod and a microwave generator.

The utility model has the beneficial effects that: the oily sludge is deeply oxidized by the advanced oxidation device, so that oil in the oily sludge can be fully released; the oil component fully released can be thoroughly separated by combining the use of a multi-stage centrifuge.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the prior art descriptions will be briefly described below. It is obvious that the drawings in the following description are only some embodiments of the utility model, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.

Fig. 1 is a schematic structural diagram of an oily sludge treatment device according to an embodiment of the present invention.

In the figure, the position of the first and second end faces,

1. a storage tank; 2. a lift pump; 3. a heat exchange tank; 4. an advanced oxidation device, 5, a three-phase centrifuge; 6. a three-legged centrifuge; 7. an oil storage tank; 8. a medicine adding tank; 9. a dose metering pump; 10. a sewage treatment system; 11. a sludge tank.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without inventive step based on the embodiments of the present invention, are within the scope of protection of the present invention.

It should be noted that, if directional indications (such as up, down, left, right, front, and back … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative positional relationship between the components, the movement situation, and the like in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indications are changed accordingly.

In addition, in the description of the present invention, the terms used are for illustrative purposes only and are not intended to limit the scope of the present invention. The terms "comprises" and/or "comprising" are used to specify the presence of stated elements, steps, operations, and/or components, but do not preclude the presence or addition of one or more other elements, steps, operations, and/or components. The terms "first," "second," and the like may be used to describe various elements, not necessarily order, and not necessarily limit the elements. In addition, in the description of the present invention, "a plurality" means two or more unless otherwise specified. These terms are only used to distinguish one element from another. These and/or other aspects will become apparent to those of ordinary skill in the art in view of the following drawings, and the description of the embodiments of the present invention will be more readily understood by those of ordinary skill in the art. The drawings are only for purposes of illustrating the described embodiments of the utility model. One skilled in the art will readily recognize from the following description that alternative embodiments of the structures and methods illustrated in the present application may be employed without departing from the principles described in the present application.

The oily sludge treatment device provided by the embodiment of the utility model comprises:

the inlet end of the advanced oxidation device 4 is connected with the outlet end of the heat exchange tank 3, and the outlet end of the advanced oxidation device 4 is connected with the inlet end of the first-stage centrifugal machine;

and the inlet end of the sewage treatment system 10 is connected with the outlet ends of the multi-stage centrifuges, and the outlet end of the sewage treatment system 10 is connected with the inlet end of the heat exchange tank 3.

It can be understood that the advanced oxidation device 4 can perform deep oxidation treatment on the oil-containing sludge to oxidize macromolecular oil components in the oil-containing sludge into small molecular oil components, so that the small molecular oil components are fully released from the oil-containing sludge, and the content of subsequently separated oil can be greatly improved. The multistage centrifuge can be used for centrifuging the deeply oxidized oily sludge, preferably, the first stage centrifuge can be a three-phase centrifuge 5 to separate the deeply oxidized oily sludge into a liquid phase, a solid phase and an oil phase, and the oil phase obtained at this time is crude oil which is primarily separated. And then, according to the treatment requirement on the oily sludge, the crude oil is sequentially subjected to multiple centrifugal treatments by a second-stage centrifugal machine, a third-stage centrifugal machine and the like to obtain separated oil meeting the requirement, and simultaneously, the oil in the oily sludge can be completely separated, so that the oil content of the finally obtained sludge is greatly reduced, and the secondary pollution can be effectively reduced. The sewage treatment system 10 is used for treating the liquid phase separated by the multistage centrifuge, and replenishing the water in the treated liquid phase into the heat exchange tank 3 as a replenishing water source, so that the water separated from the oil-containing sludge is recycled, the resources are effectively utilized, and the treatment cost of the sludge is reduced.

For example, as shown in fig. 1, the oily sludge treatment apparatus is provided with a two-stage centrifuge including a three-phase centrifuge 5 and a three-leg centrifuge 6, wherein the three-phase centrifuge 5 is provided as a first-stage centrifuge and the three-leg centrifuge 6 is provided as a second-stage centrifuge. The inlet end of the advanced oxidation device 4 is connected with the outlet end of the heat exchange tank 3; the outlet end of the advanced oxidation device 4 is connected with the inlet end of a three-phase centrifuge 5, and the outlet end of the three-phase centrifuge 5 is connected with the inlet end of a three-leg centrifuge 6. Firstly, the oil-containing sludge is washed by alkali liquor and acted by a demulsifier in a heat exchange tank 3; then the oil is conveyed into a high-grade oxidation device 4 for deep oxidation so as to release the oil in the oil; the oily sludge released by the oil content is conveyed to a three-phase centrifuge 5 for three-phase centrifugal treatment to obtain a solid phase, an oil phase and a liquid phase; wherein the oil phase is sent to a three-leg centrifuge 6 for a second centrifugation process to obtain a separated oil with higher purity.

In an alternative embodiment, the apparatus further comprises a storage tank 1 connected to the inlet end of the heat exchange tank 3 by a lift pump 2. Oily sludge is stored in the storage tank 1 in advance, and when the oily sludge starts to be treated, the oily sludge in the storage tank 1 is conveyed to the heat exchange tank 3 through the lifting pump 2. Preferably, be equipped with grid filter equipment in the storage pond 1 for before carrying oily sludge to heat transfer tank 3, carry out filtration treatment to oily sludge to get rid of the impurity of the great granule in the oily sludge, avoid oily sludge to block up elevator pump 2 or follow-up processing apparatus, simultaneously, grid filter equipment can also reach certain physics crushing effect to oily sludge, so that follow-up oil content in the better separation oily sludge.

In an alternative embodiment, the device further comprises a dosing tank 8 connected to the heat exchange tank 3 by means of a dosing pump 9. Preferably, an alkali liquor area and a demulsifier area are arranged in the dosing tank 8. Wherein the alkali liquor area in the dosing tank 8 is used for storing alkali liquor for cleaning the oil-containing sludge, and the demulsifier area in the dosing tank 8 is used for storing a demulsifier for performing demulsification treatment on the oil-containing sludge. The agent metering pump 9 can quantitatively convey the alkali liquor and the demulsifier in the agent adding tank 8 into the heat exchange tank 3 so as to be cleaned and demulsified with the oil-containing sludge, so that the oil contained in the oil-containing sludge is primarily released. Wherein the alkali liquor is sodium hydroxide solution, and the demulsifier is SP type demulsifier, and the alkali liquor and the demulsifier are not particularly limited in this application.

In an alternative embodiment, the multi-stage centrifuge consists of a three-phase centrifuge 5 and/or a three-legged centrifuge 6.

In an optional embodiment, the device further comprises an oil storage tank 7 connected with oil outlets of the multi-stage centrifuge, and a crude oil area and a pure oil area are arranged inside the oil storage tank 7.

The oil storage tank 7 is used for storing oil separated from the oil-containing sludge, wherein the crude oil area is used for storing the oil separated by the primary centrifuge, namely the three-phase centrifuge 5; the pure oil area is used for storing oil separated by a second-stage centrifugal machine, a third-stage centrifugal machine and the like. Depending on the level of the oily sludge treatment requirement, the separated oil can be stored in a corresponding region in the oil storage tank 7. For example, when the requirement of oily sludge treatment is low, the crude oil separated by the three-phase centrifuge 5 can be directly stored in the crude oil area in the oil storage tank 7; when the requirement for processing the oily sludge is high, the crude oil separated by the three-phase centrifuge 5 may be sent to the three-leg centrifuge 6 for secondary centrifugation, and then the oil component with higher purity (i.e. pure oil) separated by the three-leg centrifuge 6 may be stored in the pure oil area in the oil storage tank 7, so as to sell the separated oil component in a targeted manner.

In an alternative embodiment, a stirring device is arranged in the heat exchange tank 3. On one hand, the alkali liquor and the demulsifier can fully react with the oily sludge in the heat exchange tank 3, and on the other hand, the stirring device can also exert a certain crushing effect on the oily sludge, so that the oil contained in the stirring device is easy to release.

In an alternative embodiment, the temperature in the heat exchange tank 3 is 70 ± 5 ℃ to accelerate the reaction between the alkali liquor and the demulsifier and the oily sludge.

In an alternative embodiment, the advanced oxidation unit 4 comprises an ozone generator, an ultrasonic vibrator, and a microwave generator. Wherein the ozone generator is used for providing ozone for the advanced oxidation device 4 and taking the ozone as an oxidant to oxidize macromolecular organic matters in the oily sludge; the ultrasonic vibrator and the microwave generator supply ultrasonic waves and microwaves, respectively, to the advanced oxidation apparatus 4 so that oil in the oil-containing sludge is sufficiently released, wherein the ultrasonic waves have a frequency range of, for example, 16kHz to 1 MHz. Deep oxidation is carried out on the oily sludge in an ultrasonic mode, the degradation condition is mild and high in efficiency, and secondary pollution cannot be caused.

The method for treating the oily sludge by the oily sludge treatment device comprises the following steps: firstly filtering the oily sludge by a grid filtering device in a storage pool 1 to preliminarily remove large-particle impurities; the oily sludge without large-particle impurities is conveyed into a heat exchange tank 3 through a lift pump 2, alkali liquor and a demulsifier are added into the heat exchange tank 3 through a medicament metering pump 9, and oil in the oily sludge is preliminarily released under the action of the alkali liquor and the demulsifier; then the oily sludge is conveyed into an advanced oxidation device 4, deep oxidation is carried out on the oily sludge by using an ultrasonic method, and the internal oil of the oily sludge is separated; then the oily sludge is conveyed into a three-phase centrifuge 5 for primary centrifugal treatment, crude oil, sludge and sewage are obtained under the centrifugal action, the separated crude oil is conveyed into a crude oil area of an oil storage tank 7 for storage, the sludge is conveyed into a sludge pool 11 for outward transportation and landfill, the sewage is conveyed into a sewage treatment system 10 for treatment, and the treated water is conveyed into a heat exchange tank 3 as a supplementary water source; when the requirement on the oily sludge treatment is high, the crude oil obtained in the three-phase centrifuge 5 is conveyed to the three-leg centrifuge 6 for secondary centrifugal treatment to obtain purer oil content, and the purer oil content is stored in a pure oil area in the oil storage tank 7.

In the description provided herein, numerous specific details are set forth. It is understood, however, that embodiments of the utility model may be practiced without these specific details. In some instances, well-known methods, structures and techniques have not been shown in detail in order not to obscure an understanding of this description.

Furthermore, those of ordinary skill in the art will appreciate that while some embodiments described herein include some features included in other embodiments, rather than other features, combinations of features of different embodiments are meant to be within the scope of the utility model and form different embodiments. For example, in the claims, any of the claimed embodiments may be used in any combination.

It will be understood by those skilled in the art that while the present invention has been described with reference to exemplary embodiments, various changes may be made and equivalents may be substituted for elements thereof without departing from the scope of the utility model. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the utility model without departing from the essential scope thereof. Therefore, it is intended that the utility model not be limited to the particular embodiment disclosed, but that the utility model will include all embodiments falling within the scope of the appended claims.

Claims

1. An oil-containing sludge treatment apparatus, characterized in that the apparatus comprises:

2. The apparatus of claim 1, further comprising a storage tank connected to the inlet end of the heat exchange tank by a lift pump.

3. The apparatus of claim 1, further comprising a dosing tank connected to the heat exchange tank by a metering pump.

4. The apparatus of claim 1, wherein the multi-stage centrifuge consists of a three-phase centrifuge and/or a three-leg centrifuge.

5. The apparatus of claim 1, further comprising an oil storage tank connected to oil outlets of the plurality of stages of said centrifuge, said oil storage tank having a crude oil region and a pure oil region therein.

6. The apparatus of claim 2, wherein a grating filter device is disposed in the reservoir.

7. The apparatus of claim 3, wherein the dosing tank has a caustic section and a breaker section.

8. The apparatus of claim 1 wherein said heat exchange tank contains agitation means.

9. The apparatus of claim 1, wherein the temperature within the heat exchange tank is 70 ± 5 ℃.

10. The apparatus of claim 1, wherein the advanced oxidation apparatus comprises an ozone generator, an ultrasonic vibrator rod, and a microwave generator.