CN112158914A - Oily sewage treatment system - Google Patents
Oily sewage treatment system Download PDFInfo
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- CN112158914A CN112158914A CN202011234952.1A CN202011234952A CN112158914A CN 112158914 A CN112158914 A CN 112158914A CN 202011234952 A CN202011234952 A CN 202011234952A CN 112158914 A CN112158914 A CN 112158914A
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- oily sewage
- oil
- air
- adsorption column
- separation
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/40—Devices for separating or removing fatty or oily substances or similar floating material
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/24—Treatment of water, waste water, or sewage by flotation
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/28—Treatment of water, waste water, or sewage by sorption
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- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Analytical Chemistry (AREA)
- Physical Water Treatments (AREA)
- Water Treatment By Sorption (AREA)
Abstract
The invention relates to an oily sewage treatment system which comprises an oil separation tank, an adsorption column, air floatation equipment and an air dissolving system, wherein oily sewage sequentially passes through the oil separation tank, the adsorption column and the air floatation equipment. The invention efficiently separates the oil in the oily sewage by three modes of oil separation, adsorption and gas dissolution, the discharged water meets the discharge requirement, and the separated oil can be efficiently recycled.
Description
Technical Field
The invention relates to an oily sewage treatment system.
Background
The refining enterprises generate a large amount of oily sewage in the petroleum refining and wastewater treatment processes, and the oily sewage mainly comes from an oil separation tank, a flotation tank, residual activated sludge, a crude oil dehydration tank, an oil storage tank, a sump oil tank and the like. The oily sewage has complex components, belongs to a stable multiphase system, is fully mixed, has high viscosity, is difficult to completely settle solid phase, and is difficult to treat oil sludge. At present, in the petrochemical industry of China, about 80 ten thousand tons of oil sludge are generated each year on average. Along with the continuous expansion of the scale of the production devices of enterprises, the corresponding total amount and types of waste residue discharge are gradually increased, so that the total amount of pollution discharge and pollution treatment cost of the enterprises also show a rising trend. In recent years, with the increasing requirements of the national environmental protection regulation standard, the environmental protection law enforcement is increased, and the pollution control and resource utilization of the solid waste generated in the production process become difficult problems in the petroleum and petroleum processing industry. The newly revised 'environmental protection and control law of solid waste pollution' puts forward more strict requirements on the prevention and control of the solid waste. The treatment and utilization of solid wastes have been listed as important work contents for building an economical society.
With the development of national economy and the attention on environmental protection, more and more institutions develop the research on the treatment of oily sewage. However, most of the technologies have difficulty in being popularized and applied to form industrial production due to high treatment cost, long process flow, complex operation, non-ideal treatment effect or other reasons in many aspects.
Disclosure of Invention
The invention aims to solve the defects of the prior art and provides an oily sewage treatment system which comprises an oil separation tank, an adsorption column, an air floatation device and an air dissolving system, wherein oily sewage sequentially passes through the oil separation tank, the adsorption column and the air floatation device, an electric control system is used for controlling the operation of the air dissolving system, the oil separation tank and the adsorption column, and the air dissolving system is used for enabling gas to pass through the air floatation device from bottom to top.
The oil separation tank is used for preliminarily separating upper oil and lower water in the oily sewage, the oil components used for adsorbing and oxidizing the oily sewage are adsorbed, the air floatation equipment is used for separating fine oil particles in the oily sewage, and the oil separated by the air floatation equipment enters the oil separation tank.
As a preferable technical solution, the oily sewage treatment system further comprises a first water pump, and the first water pump is used for introducing the oily sewage into the oil separation tank.
As a preferable technical solution, the oily sewage treatment system further comprises a second water pump, and the second water pump is used for introducing the oily sewage separated in the oil separation tank into the adsorption column.
As a preferred technical scheme, the oil separation tank comprises an oily sewage inlet, an oil separation tank main body, an oil scraping module, an oil stain outlet and an oily sewage outlet, wherein the oily sewage inlet is used for introducing oily sewage and oil separated by the air floatation equipment, and the oil scraping module is used for separating the oil on the upper layer from the water on the lower layer.
As a preferred technical scheme, the adsorption column is a cylinder filled with adsorption materials, the adsorption column further comprises an adsorption column inlet and an adsorption column outlet, the adsorption column inlet is arranged on the upper portion of the cylinder, the adsorption column outlet is arranged on the lower portion of the cylinder, the adsorption column inlet is connected with the oil separation tank through a second water pump, and the adsorption column outlet is connected with the air floatation equipment.
As a preferable technical scheme, the adsorption material filled in the adsorption column can be taken out.
The air flotation device comprises an air flotation area, a separation area arranged above the air flotation area, a clear water area arranged outside the air flotation area, a separation module, a separation outlet, a clear water discharge port, an air dissolved inlet and an oily sewage inlet, wherein the air flotation area is communicated with the separation area, the separation area is communicated with the clear water area, the dissolved air is introduced into the lower part of the air flotation area through the air dissolved inlet, the oily sewage enters the air flotation area through the oily sewage inlet, the oil separated from the oily sewage after entering the separation area through the separation module is discharged through the separation outlet, and the water separated from the oily sewage after entering the separation area through the separation module is discharged from the clear water discharge port through the clear water area.
As a preferred technical solution, the separation module is disposed above the separation zone.
As a preferred technical scheme, the oily sewage treatment system is skid-mounted equipment, and the skid-mounted equipment comprises a skid-mounted frame body.
As a preferred technical scheme, the oil separation tank and the adsorption column are arranged on one side of the skid-mounted frame body, and the air floatation device and the air dissolving system are arranged on the other side of the skid-mounted frame body.
The working principle of the equipment is as follows: the physical treatment process of oily sewage is a high-efficiency, safe and reliable treatment method, and its principle mainly utilizes the difference of specific weight of oil molecules in water to effectively separate oil from water. The main process is as follows: the floating oil (oil-water mixture with certain air) on the water surface is collected into an oil separation tank through a floater oil collector arranged on the oil surface of the oily sewage. Water and oil are separated in the oil separation tank, and meanwhile sucked dirt can be intercepted by a filter screen in the oil separation tank. After the water in the oil separation tank reaches a certain liquid level, the water is sent into the adsorption column by a lifting pump controlled by the liquid level sensing device for further oil-water separation treatment, and oil products in the oil separation tank are pushed into the oil collecting tank by the oil scraping plate above the liquid level for recycling and refining. The characteristics of high solid oil and strong oil absorption of an adsorbing material are utilized in the adsorption column, a trace amount of emulsified oil in the oil separation tank is subjected to demulsification adsorption, and when a small amount of bright oil or suspended oil is contained in the effluent of the adsorption column, the floating oil can be separated by integrated air floatation equipment so as to ensure the quality of the effluent.
The invention efficiently separates the oil in the oily sewage by three modes of oil separation, adsorption and gas dissolution, the discharged water meets the discharge requirement, and the separated oil can be efficiently recycled.
The above-described and other features, aspects, and advantages of the present application will become more apparent with reference to the following detailed description.
Drawings
Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:
FIG. 1 is a schematic top view of an oily sewage treatment system according to the present invention.
Fig. 2 is a schematic view of the oil separation tank structure.
FIG. 3 is a schematic view of the structure of the adsorption column.
FIG. 4 is a schematic structural diagram of an air floatation apparatus.
Reference numerals:
the device comprises an oil separation tank 1, an adsorption column 2, an air floatation device 3, an air dissolving system 4, a first water pump 5 and a second water pump 6;
the oil-containing sewage treatment device comprises an oil-containing sewage inlet 11, an oil separation tank main body 12, an oil scraping module 13, an oil stain outlet 14 and an oil-containing sewage outlet 15;
an adsorption material 21, an adsorption column 22, an adsorption column inlet 23 and an adsorption column outlet 24;
the device comprises an air flotation zone 31, a separation zone 32, a clean water zone 33, a separation module 34, a separation outlet 35, a clean water discharge port 36, a dissolved air inlet 37 and an oily sewage inlet 38.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the drawings of the embodiments of the present invention. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the invention without any inventive step, are within the scope of protection of the invention.
Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs. The use of "first," "second," and similar terms in the description and claims of the present application do not denote any order, quantity, or importance, but rather the terms are used to distinguish one element from another. Also, the use of the terms "a" or "an" and the like do not denote a limitation of quantity, but rather denote the presence of at least one.
Referring to fig. 1-3, a system for treating oily sewage, which comprises an oil separation tank, an adsorption column, an air floatation device and an air dissolving system, wherein the oily sewage sequentially passes through the oil separation tank, the adsorption column and the air floatation device, an electric control system is used for controlling the operation of the air dissolving system, the oil separation tank and the adsorption column, the air dissolving system is used for leading gas to pass through the air floatation device from bottom to top,
the oil separation tank is used for preliminarily separating upper oil from lower oil in the oily sewage and adsorbing oil components used for adsorbing and oxidizing the oily sewage, the air floatation equipment is used for separating fine oil particles in the oily sewage, and the oil separated by the air floatation equipment enters the oil separation tank.
An oil separation tank: the oil-water mixture is quickly layered in the oil separation tank, water is collected from the lower end of the oil separation tank after layering, and oil products are pushed into the oil groove by the oil scraping plate positioned on the liquid level and collected. The filter is arranged at the water outlet of the oil separation tank, so that most of particle pollutants can be intercepted.
Adsorption column: the outlet water of the oil separation tank is pumped into an adsorption column for further oil-water separation, emulsified oil in the oily sewage is demulsified, and a large amount of suspended matters and organic matters in the sewage are removed.
Air floatation equipment: a large amount of generated fine bubbles generated by high-pressure dissolved air are utilized, the micro bubbles are adhered to suspended particles in the wastewater to form a 'bubble particle' complex with the whole density smaller than that of water, and the suspended particles float to the water surface along with the bubbles to form foam floating oil, so that the floating oil in the water is separated, and the oil content of the effluent is guaranteed to be discharged after reaching the standard.
As a preferred embodiment, the oily sewage treatment system further comprises a first water pump for introducing the oily sewage into the oil interceptor.
In a preferred embodiment, the oily sewage treatment system further comprises a second water pump for introducing the oily sewage separated in the oil separation tank into the adsorption column.
As a preferred embodiment, as shown in fig. 2, the oil separation tank is composed of an oily sewage inlet, an oil separation tank main body, an oil scraping module, an oil stain outlet and an oily sewage outlet, wherein the oily sewage inlet is used for introducing oily sewage and oil separated by the air floatation equipment, and the oil scraping module is used for separating the oil on the upper layer from the water on the lower layer.
As a preferred embodiment, as shown in fig. 3, the adsorption column is a column filled with an adsorption material, and further includes an adsorption column inlet and an adsorption column outlet, the adsorption column inlet is disposed on the upper portion of the column, the adsorption column outlet is disposed on the lower portion of the column, the adsorption column inlet is connected to the oil separation tank through a second water pump, and the adsorption column outlet is connected to the air flotation device.
In a preferred embodiment, the adsorbent material packed in the adsorption column can be removed.
As a preferred embodiment, as shown in fig. 3, the air flotation device comprises an air flotation region, a separation region arranged above the air flotation region, a clear water region arranged outside the air flotation region, a separation module, a separation outlet, a clear water discharge outlet, a dissolved air inlet, and an oily sewage inlet, wherein the air flotation region is communicated with the separation region, the separation region is communicated with the clear water region, the dissolved air is introduced into the lower part of the air flotation region through the dissolved air inlet, the oily sewage enters the air flotation region through the oily sewage inlet, the oily sewage enters the separation region, then the separated oil passes through the separation module and is discharged through the separation outlet, and the separated water passes through the separation module after the oily sewage enters the separation region and is discharged through the clear water discharge outlet.
As a preferred embodiment, the separation module is disposed above the separation zone.
In a preferred embodiment, the oily sewage treatment system is a skid-mounted device, and the skid-mounted device comprises a skid-mounted frame body.
In a preferred embodiment, the oil separation tank and the adsorption column are provided on one side of the skid-mounted frame, and the air floatation device and the air dissolving system are provided on the other side of the skid-mounted frame.
While there have been shown and described what are at present considered the fundamental principles and essential features of the invention and its advantages, it will be apparent to those skilled in the art that the invention is not limited to the details of the foregoing exemplary embodiments, but is capable of other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and the description is given here only for clarity, and those skilled in the art should integrate the description, and the embodiments may be combined appropriately to form other embodiments understood by those skilled in the art.
Claims (10)
1. The oily sewage treatment system is characterized by consisting of an oil separation tank, an adsorption column, air floatation equipment and an air dissolving system, wherein oily sewage sequentially passes through the oil separation tank, the adsorption column and the air floatation equipment, and the air dissolving system is used for enabling gas to pass through the air floatation equipment from bottom to top.
2. The oily sewage treatment system of claim 1 further comprising a first water pump for introducing oily sewage into the oil separation tank.
3. The oily sewage treatment system of claim 2, further comprising a second water pump for introducing the oily sewage separated in the oil separation tank into the adsorption column.
4. The oily sewage treatment system of claim 3, wherein the oil separation tank consists of an oily sewage inlet, an oil separation tank main body, an oil scraping module, an oil stain outlet and an oily sewage outlet, the oily sewage inlet is used for introducing oily sewage and oil separated by the air floatation equipment, and the oil scraping module is used for separating oil on the upper layer from water on the lower layer.
5. The oily sewage treatment system of claim 3, wherein the adsorption column is a column filled with an adsorption material, the adsorption column further comprises an adsorption column inlet and an adsorption column outlet, the adsorption column inlet is arranged at the upper part of the column, the adsorption column outlet is arranged at the lower part of the column, the adsorption column inlet is connected with the oil separation tank through a second water pump, and the adsorption column outlet is connected with the air flotation device.
6. The oily sewage treatment system of claim 5 wherein the adsorbent column is removable from the packed adsorbent material.
7. The oily sewage treatment system of claim 3, wherein the air flotation device comprises an air flotation region, a separation region arranged above the air flotation region, a clear water region arranged outside the air flotation region, a separation module, a separation outlet, a clear water discharge port, a dissolved air inlet and an oily sewage inlet, the air flotation region is communicated with the separation region, the separation region is communicated with the clear water region, the dissolved air is introduced into the lower part of the air flotation region through the dissolved air inlet, the oily sewage enters the air flotation region through the oily sewage inlet, the separated oil after the oily sewage enters the separation region and passes through the separation module is discharged through the separation outlet, and the separated water after the oily sewage enters the separation region and passes through the separation module is discharged from the clear water discharge port through the clear water region.
8. The oily sewage treatment system of claim 7 wherein the separation module is disposed above the separation zone.
9. The oily sewage treatment system of claim 3, wherein the oily sewage treatment system is a skid-mounted device, and the skid-mounted device comprises a skid-mounted frame.
10. The oily sewage treatment system of claim 3, wherein the oil separation tank and the adsorption column are arranged on one side of the skid-mounted frame body, and the air floatation device and the air dissolving system are arranged on the other side of the skid-mounted frame body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011234952.1A CN112158914A (en) | 2020-11-08 | 2020-11-08 | Oily sewage treatment system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011234952.1A CN112158914A (en) | 2020-11-08 | 2020-11-08 | Oily sewage treatment system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112158914A true CN112158914A (en) | 2021-01-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011234952.1A Pending CN112158914A (en) | 2020-11-08 | 2020-11-08 | Oily sewage treatment system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112158914A (en) |
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2020
- 2020-11-08 CN CN202011234952.1A patent/CN112158914A/en active Pending
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