Device for efficiently separating water from carbolic oil

Abstract

The utility model discloses a device for efficiently separating water from carbolic oil. The device comprises a heating tank, a standing separation tank, a primary water-oil separator, a secondary water-oil separator and a light oil collecting tank which are sequentially connected through pipelines, the standing separation tank is connected with a heavy oil treatment tank through a pipeline; the lower ends of the primary water-oil separator and the secondary water-oil separator are connected with a wastewater negative-pressure treatment tank; a backflow pipeline is also connected between the primary water-oil separator and the secondary water-oil separator; and the backflow pipeline is connected with detection equipment. According to the device for efficiently separating the water from the carbolic oil, the oil-water separation effect is fully achieved after two times of standing, the water content of the dephenolized carbolic oil is reduced, the product quality is stabilized, the production cost is reduced, the production efficiency is improved, and the separated water can be reused after being subjected to negative pressure treatment and odor removal.

Description

Technical Field

[0001] The utility model relates to the technical field of phenol oil dehydration, in particular to a device for efficiently separating water from phenol oil. Background Art

[0002] Wastewater mainly containing volatile phenol and non-volatile phenol is discharged during industrial production. Coking plants, gas generating stations, synthetic phenol plants, pharmaceutical plants, synthetic fiber plants and other production processes will produce a large amount of phenol-containing wastewater. Phenol oil is a substance in phenol-containing wastewater. Phenol oil is a chemical substance and is an acidic corrosive product. It is used to extract phenol and pyridine alkali. After washing, phenol oil is used to prepare coumarone indene resin. It is a colorless, transparent or slightly yellowish liquid at room temperature and pressure with a special smell and is insoluble in water. Phenol oil has serious harm to the environment and can cause pollution to water bodies and the atmosphere. Therefore, when purifying phenol-containing wastewater, phenol oil needs to be dehydrated.

[0003] Existing phenol oil is usually deeply dehydrated by physical and chemical methods, which have the problems of large processing equipment footprint, long processing time, complex process flow and low efficiency. As a result, the water content of phenol oil deeply dehydrated is high and the dehydration is not thorough, which cannot meet the requirements of the water content index of the recovered oil. In addition, the wastewater contains a pungent odor and cannot be reused. Utility Model Content

[0004] The utility model aims to solve the problem of phenol oil dehydration in the prior art and proposes a device for efficiently separating water from phenol oil.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A device for efficiently separating water from phenol oil comprises a heating tank, a static separation tank, a primary water-oil separator, a secondary water-oil separator and a light oil collection tank which are sequentially connected by pipelines; the static separation tank is connected to a heavy oil treatment tank via a pipeline; the lower ends of the primary water-oil separator and the secondary water-oil separator are connected to a wastewater negative pressure treatment tank; a reflux pipeline is also connected between the primary water-oil separator and the secondary water-oil separator; and a detection device is connected to the reflux pipeline.

[0007] A diversion pipeline is connected between the light oil collection tank and the heavy oil processing tank; part of the light oil in the light oil collection tank flows into the heavy oil processing tank through the diversion pipeline for heat exchange treatment.

[0008] The pipelines are connected with production pumps and stop valves.

[0009] The upper ends of the primary water-oil separator and the secondary water-oil separator are both connected to a primary light oil input pipe and a primary light oil output pipe; the lower ends of the primary water-oil separator and the secondary water-oil separator are connected to a water outlet pipe; the primary water-oil separator and the secondary water-oil separator are connected to the wastewater negative pressure treatment tank via the water outlet pipe.

[0010] The upper ends of the primary water-oil separator and the secondary water-oil separator are both connected to a waste gas collecting pipe; the primary water-oil separator and the secondary water-oil separator are connected to a waste gas collecting tank via the waste gas collecting pipe.

[0011] The primary water-oil separator and the secondary water-oil separator are both connected with a reflux pipe; the primary water-oil separator and the secondary water-oil separator are connected with the reflux pipeline through the reflux pipe.

[0012] A negative pressure flue gas absorption system is arranged in the wastewater negative pressure treatment tank; a wastewater collecting tank is connected to the wastewater negative pressure treatment tank; and a raw material dilute alkali preparation system is externally connected to the wastewater collecting tank.

[0013] Compared with the prior art, the utility model provides a device for efficiently separating water from phenol oil, which has the following beneficial effects:

[0014] The device for efficiently separating water from phenol oil separates water by arranging two water-oil separators, and adds detection equipment and a reflux channel for separation. After passing the detection, reflux separation can be performed again, and the separated water can be reused after being deodorized by negative pressure treatment. The device is simple to operate, and after two standing times, the effect of oil-water separation is fully achieved, the water content of dephenolized phenol oil is reduced, the product quality is stabilized, the production cost is reduced, and the production efficiency is improved.

[0015] The parts not involved in the device are the same as those in the prior art or can be implemented by using the prior art. The utility model has a simple structure and is easy to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of the utility model;

[0017] Figure 2 It is a schematic diagram of the structure of a primary water-oil separator in the utility model.

[0018] In the figure: 1 heating tank, 2 static separation tank, 3 primary water-oil separator, 31 primary light oil input pipe, 32 primary light oil output pipe, 33 exhaust gas collection pipe, 34 outlet pipe, 35 reflux pipe, 4 heavy oil treatment tank, 5 secondary water-oil separator, 6 wastewater negative pressure treatment tank, 7 light oil collection tank, 8 wastewater collection tank, 9 detection equipment, 10 production pump, 11 stop valve, 12 exhaust gas collection tank, 13 reflux pipeline, 14 diversion pipeline. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0020] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0021] Embodiment 1:

[0022] Reference Figure 1-2 A device for efficiently separating water from phenol oil comprises a heating tank 1, a static separation tank 2, a primary water-oil separator 3, a secondary water-oil separator 5 and a light oil collection tank 7 which are sequentially connected by pipelines; the static separation tank 2 is connected to a heavy oil treatment tank 4 through a pipeline; the lower ends of the primary water-oil separator 3 and the secondary water-oil separator 5 are connected to a wastewater negative pressure treatment tank 6; a reflux pipeline 13 is also connected between the primary water-oil separator 3 and the secondary water-oil separator 5; a detection device 9 is connected to the reflux pipeline 13; a shunt pipeline 14 is connected between the light oil collection tank 7 and the heavy oil treatment tank 4; part of the light oil in the light oil collection tank 7 flows into the heavy oil treatment tank 4 through the shunt pipeline 14 for heat exchange treatment, so as to facilitate the treatment of the heavy oil.

[0023] The upper ends of the primary water-oil separator 3 and the secondary water-oil separator 5 are both connected to the primary light oil input pipe 31 and the primary light oil output pipe 32; the lower ends of the primary water-oil separator 3 and the secondary water-oil separator 5 are connected to the water outlet pipe 34; the primary water-oil separator 3 and the secondary water-oil separator 5 are connected to the wastewater negative pressure treatment tank 6 through the water outlet pipe 34; the upper ends of the primary water-oil separator 3 and the secondary water-oil separator 5 are both connected to the waste gas collecting pipe 33; the primary water-oil separator 3 and the secondary water-oil separator 5 are connected to the waste gas collecting tank 12 through the waste gas collecting pipe 33, and the waste gas collecting tank 12.

[0024] The primary water-oil separator 3 and the secondary water-oil separator 5 are both connected with a reflux pipe 35 ; the primary water-oil separator 3 and the secondary water-oil separator 5 are connected with the reflux pipeline 13 via the reflux pipe 35 .

[0025] The detection device 9 includes a sensor for detecting the bound water content in the light oil; the data detected by the sensor is processed into a bound water content value. When the value is higher than a preset threshold, it indicates that the bound water content is too high, that is, the treatment of the bound water in the light oil is not thorough enough, and the unqualified light oil needs to be returned to the primary water-oil separator 3 through the production pump 10, and then through the return material treatment until the sensor detects that the bound water content meets the standard, that is, is lower than the preset threshold. At this time, the stop valve 11 to the light oil collection tank 7 is opened.

[0026] The pipelines are connected with production pumps 10 and stop valves 11, and the number and positions of the production pumps 10 and stop valves 11 can be installed according to actual conditions.

[0027] Embodiment 2:

[0028] On the basis of the above embodiment, a negative pressure flue gas absorption system is provided in the wastewater negative pressure treatment tank 6; the pungent smell in the wastewater is absorbed by negative pressure, and the wastewater negative pressure treatment tank 6 is connected to a wastewater collecting tank 8; the wastewater collecting tank 8 is externally connected to a raw material dilute alkali preparation system, and the wastewater treated by the wastewater negative pressure treatment tank 6 can be used for other purposes such as raw material dilute alkali preparation, thereby preventing large-scale discharge of wastewater.

[0029] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A device for efficiently separating water from phenol oil, characterized in that: The invention comprises a heating tank (1), a static separation tank (2), a primary water-oil separator (3), a secondary water-oil separator (5) and a light oil collection tank (7) which are connected in sequence by pipelines; the static separation tank (2) is connected to a heavy oil treatment tank (4) via a pipeline; the lower ends of the primary water-oil separator (3) and the secondary water-oil separator (5) are connected to a wastewater negative pressure treatment tank (6); a return pipeline (13) is also connected between the primary water-oil separator (3) and the secondary water-oil separator (5); and the return pipeline (13) is connected to a detection device (9).

2. The device for efficiently separating water from phenol oil according to claim 1, characterized in that: A diversion pipe (14) is connected between the light oil collection tank (7) and the heavy oil processing tank (4); part of the light oil in the light oil collection tank (7) flows into the heavy oil processing tank (4) through the diversion pipe (14) for heat exchange treatment.

3. The device for efficiently separating water from phenol oil according to claim 1, characterized in that: The pipelines are connected to a production pump (10) and a stop valve (11).

4. The device for efficiently separating water from phenol oil according to claim 1, characterized in that: The upper ends of the primary water-oil separator (3) and the secondary water-oil separator (5) are both connected to a primary light oil input pipe (31) and a primary light oil output pipe (32); the lower ends of the primary water-oil separator (3) and the secondary water-oil separator (5) are connected to a water outlet pipe (34); the primary water-oil separator (3) and the secondary water-oil separator (5) are connected to a wastewater negative pressure treatment tank (6) via the water outlet pipe (34).

5. The device for efficiently separating water from phenol oil according to claim 1, characterized in that: The upper ends of the primary water-oil separator (3) and the secondary water-oil separator (5) are both connected to a waste gas collection pipe (33); the primary water-oil separator (3) and the secondary water-oil separator (5) are connected to a waste gas collection tank (12) via the waste gas collection pipe (33).

6. The device for efficiently separating water from phenol oil according to claim 1, characterized in that: The primary water-oil separator (3) and the secondary water-oil separator (5) are both connected to a return pipe (35); the primary water-oil separator (3) and the secondary water-oil separator (5) are connected to a return pipeline (13) via the return pipe (35).

7. The device for efficiently separating water from phenol oil according to claim 1, characterized in that: The wastewater negative pressure treatment tank (6) is provided with a negative pressure flue gas absorption system; the wastewater negative pressure treatment tank (6) is connected to a wastewater collection tank (8); the wastewater collection tank (8) is externally connected to a raw material diluted alkali preparation system.

Images