Efficient oil-water separator

Abstract

The invention relates to the field of safety and environmental protection of chemical production, in particular to an efficient oil-water separator, and aims to solve the problem that oil gas in waste gas is absorbed in water mist in a water spraying manner when tail gas or waste gas generated in the chemical production process is treated, so that the waste gas is polluted. In order to solve the technical problem of how to separate and recover a mixture of sprayed oil, water and other impurities, the oil-water mixture is conveyed into a separation kettle through a mixture conveying pipe group, the separation kettle is divided into three parts through an overflow plate group in the separation kettle, the oil and the water are separated by utilizing different densities of the oil and the water and combining the structure of the overflow plate group, and the oil and the water are recycled. Separated oil enters the oil overflowing bin and the water overflowing bin and is discharged through the oil discharging pipe set and the water discharging pipe set, and a mixture in the separation bin is cleaned and discharged through the bottom cleaning pipe set.

Description

Technical Field

[0001] The present invention relates to the field of chemical production safety and environmental protection, and in particular to a high-efficiency oil-water separator. Background Art

[0002] Chemical production processes often generate waste gas or tail gas. Conventional recycling of these gases typically involves water spraying, where the oil and gas in the waste gas are absorbed by the water mist. For example, in the prior art (Patent No. CN2023107242246, Patent Name: A Chlorobenzene Plant Oil and Gas Recovery Process), the waste gas from the unloading platform is collected and then first sent to a water spray tower, where water spray is used to wash and intercept water-soluble substances. The unloading platform waste gas, after being sprayed, is then combined with the waste gas from the storage tanks and fed into a heat exchanger for low-temperature condensation. The resulting liquid (oil-water mixture) is then discharged and then passed through an adsorption filter for adsorption treatment. After the three-stage treatment, the waste gas is discharged into the atmosphere, meeting emission standards. How to separate and recover the mixture of oil, water and other impurities after spraying is also an urgent problem to be solved. The general oil-water separation device has a complex structure and low efficiency, and cannot meet the actual needs in efficient chemical production.

[0003] Therefore, the present invention provides an efficient oil-water separator that can separate oil, water and other impurities simply and quickly. Summary of the Invention

[0004] To solve the above technical problems.

[0005] The present application provides a high-efficiency oil-water separator, comprising: a separation kettle for separating a mixture of oil, water and other impurities, a mixture conveying pipe group, a drainage pipe group, an oil drainage pipe group and a bottom cleaning pipe group, wherein the mixture conveying pipe group is connected to one side of the middle section of the separation kettle, the drainage pipe group and the oil drainage pipe group are respectively arranged at the bottom of both ends of the separation kettle and are connected to the separation kettle, the bottom cleaning pipe group is arranged at the bottom of the middle section of the separation kettle, an overflow plate group for separating oil and water is provided in the separation kettle, and the separation kettle is divided into an oil overflow bin, a separation bin and a water overflow bin by the overflow plate group, the oil drainage pipe group is connected to the oil overflow bin, the drainage pipe group is connected to the water overflow bin, and the mixture conveying pipe group and the bottom cleaning pipe group are connected to the separation bin.

[0006] The following preferred technical solution is provided: the overflow plate group includes an oil overflow plate, a water overflow plate and an oil separator plate. The oil overflow plate and the water overflow plate are arranged at intervals in the separation kettle, and the separation kettle is divided into three parts: an oil overflow bin, a separation bin and an overflow bin. The oil separator plate is located between the oil overflow plate and the water overflow plate and is close to the water overflow plate. An overflow channel is formed between the oil separator plate and the water overflow plate.

[0007] The following preferred technical solution is provided: an oil overflow port is formed between the upper end of the oil overflow plate and the separation kettle, a water overflow port is formed between the upper end of the water overflow plate and the separation kettle, a water outlet is formed between the lower end of the oil separator plate and the separation kettle, and the oil overflow port is higher than the water overflow port.

[0008] The following preferred technical solution is provided: a filter is provided below the mixture conveying pipe group, the filter is installed at the separation bin through a sewage pipe, a sealed hatch is installed at the outlet of the sewage pipe, one end of the filter extends into the separation bin and the top of the filter faces the mixture conveying pipe group and is connected to it.

[0009] The following preferred technical solution is provided: a plurality of groups of corrugated surge plates are arranged inside the filter screen, and filter holes are also opened on the surge plates.

[0010] The following preferred technical solution is provided: a heating coil is provided on the top of the separation bin, the heating coil is connected to an external hot water supply pipeline, and the heating coil is close to the oil overflow port.

[0011] The following preferred technical solution is provided: a U-shaped heating pipe is provided at one end of the oil overflow tank near the oil drain pipe group, the U-shaped heating pipe extends into the oil overflow tank through the installation pipe, and the U-shaped heating pipe is connected to the external hot water supply pipeline.

[0012] The following preferred technical solution is provided: an overflow pipe is provided on the overflow bin, and the mouth of the overflow pipe is directly opposite to or slightly lower than the overflow port.

[0013] Compared with the prior art, the present invention has the following beneficial effects: 1. In order to solve the technical problem of how to separate and recover the mixture of oil, water and other impurities after spraying when treating the tail gas or waste gas generated in the chemical production process, the present application uses a water spraying method to absorb the oil and gas in the waste gas in the water mist. The present invention uses a mixture conveying pipe group to convey the oil, water and other mixtures into a separation kettle, and the separation kettle is divided into three parts by an overflow plate group in the separation kettle. The different densities of oil and water are utilized, and combined with the structure of the overflow plate group, the oil and water are separated, so that the separated oil enters the oil overflow bin and the water overflow bin respectively, and is discharged separately by using the oil drain pipe group and the drainage pipe group, and the mixture in the separation bin is cleared and discharged by the bottom cleaning pipe group.

[0014] 2. In order to prevent the oil from freezing at the top of the separation bin and clogging the oil overflow port under cold conditions, this application provides heat to the heating coil to prevent the oil and water at the top of the separation bin from freezing. In order to prevent the oil from freezing in the oil overflow bin and clogging the oil drain pipe under low temperature, affecting the separation and oil discharge process, the bottom space of the oil overflow bin is heated by a U-shaped heating pipe to prevent the oil from freezing. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 Schematic diagram of the three-dimensional structure of the present invention Figure 1 ; Figure 2 Schematic diagram of the three-dimensional structure of the present invention Figure 2 ; Figure 3 The main view of the present invention Figure 1 ; Figure 4 The main view of the present invention Figure 2 ; Figure 5 A half-section view of the present invention; Figure 6 Schematic diagram of the three-dimensional structure of the filter screen and surge plate of the present invention; Figure 7 is a cross-sectional view of the filter screen and surge plate of the present invention; Figure 8 This is a schematic diagram of the three-dimensional structure of the mixture delivery pipe assembly of the present invention; The numbers in the figure are: 1-separation kettle; 2-mixture conveying pipe group; 3-drainage pipe group; 4-oil drainage pipe group; 5-bottom cleaning pipe group; 6-overflow plate group; 7-oil overflow tank; 8-separation tank; 9-water overflow tank; 10-heating coil; 11-U-shaped heating pipe; 12-installation pipe; 13-overflow pipe; 21-filter; 22-drainage pipe; 23-sealed hatch; 24-surge plate; 61-oil overflow plate; 62-water overflow plate; 63-oil separator; 64-overflow channel; 65-oil overflow port; 66-overflow port; 67-water outlet. DETAILED DESCRIPTION

[0016] The following description is intended to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are merely examples, and those skilled in the art may conceive of other obvious variations.

[0017] like Figures 1 to 4 As shown, the following preferred technical solutions are provided: A high-efficiency oil-water separator comprises: a separation kettle 1 for separating a mixture of oil, water and other impurities, a mixture conveying pipe group 2, a drainage pipe group 3, an oil discharge pipe group 4 and a bottom cleaning pipe group 5, wherein the mixture conveying pipe group 2 is connected to one side of the middle section of the separation kettle 1, the drainage pipe group 3 and the oil discharge pipe group 4 are respectively arranged at the bottom of both ends of the separation kettle 1 and are connected to the separation kettle 1, the bottom cleaning pipe group 5 is arranged at the bottom of the middle section of the separation kettle 1, an overflow plate group 6 for separating oil and water is provided in the separation kettle 1, and the separation kettle 1 is divided into an oil overflow bin 7, a separation bin 8 and a water overflow bin 9 by the overflow plate group 6, the oil discharge pipe group 4 is connected to the oil overflow bin 7, the drainage pipe group 3 is connected to the water overflow bin 9, and the mixture conveying pipe group 2 and the bottom cleaning pipe group 5 are connected to the separation bin 8.

[0018] Specifically, in order to solve the technical problem of how to separate and recover the mixture of oil, water and other impurities after spraying when treating the tail gas or waste gas generated in the chemical production process, the oil and gas in the waste gas are absorbed in the water mist by water spraying, the present invention transports the mixture of oil, water and other impurities into the separation kettle 1 through the mixture conveying pipe group 2, and divides the separation kettle 1 into three parts through the overflow plate group 6 in the separation kettle 1. The different densities of oil and water are utilized, and combined with the structure of the overflow plate group 6, the oil and water are separated, so that the separated oil enters the oil overflow bin 7 and the water overflow bin 9 respectively, and is discharged respectively by the oil drain pipe group 4 and the drain pipe group 3, and the mixture in the separation bin 8 is cleared and discharged through the bottom cleaning pipe group 5.

[0019] The overflow plate group 6 includes an oil overflow plate 61, a water overflow plate 62 and an oil separator 63. The oil overflow plate 61 and the water overflow plate 62 are arranged at intervals in the separation kettle 1, and the separation kettle 1 is divided into three parts: an oil overflow bin 7, a separation bin 8 and an overflow bin 9. The oil separator 63 is located between the oil overflow plate 61 and the water overflow plate 62 and is close to the water overflow plate 62. An overflow channel 64 is formed between the oil separator 63 and the water overflow plate 62.

[0020] An oil overflow port 65 is formed between the upper end of the oil overflow plate 61 and the separation kettle 1 , a water overflow port 66 is formed between the upper end of the water overflow plate 62 and the separation kettle 1 , and a water outlet 67 is formed between the lower end of the oil separator 63 and the separation kettle 1 . The oil overflow port 65 is higher than the water overflow port 66 .

[0021] By setting up the oil overflow plate 61, the water overflow plate 62 and the oil separator 63, when the oil and water are separated, the oil floats on the water surface due to its low density. The oil-water mixture is in the area of ​​the oil separator 63 and the oil overflow plate 61. The oil will enter the oil overflow tank 7 through the oil overflow port 65, while the water will enter the overflow channel 64 formed between the oil separator 63 and the water overflow plate 62 through the water port 67 below the oil separator 63, and then be discharged into the overflow tank 9 from the overflow port 66.

[0022] like Figure 6 and 7 As shown, the following preferred technical solutions are provided: A filter screen 21 is provided below the mixture delivery pipe group 2. The filter screen 21 is installed at the separation chamber 8 through a sewage pipe 22. A sealed hatch 23 is installed at the outlet of the sewage pipe 22. One end of the filter screen 21 extends into the separation chamber 8 and the top of the filter screen 21 faces the mixture delivery pipe group 2 and is connected to it. The surface of the filter screen 21 can be tightly attached to the lower end of the mixture delivery pipe group 2. A connecting port for the mixture delivery pipe 2 is provided on the filter screen 21. The two fit together so that the mixture can smoothly enter the filter screen. Specifically, in order to solve the technical problem of filtering a mixture containing impurities and preventing the impurities from sinking to the bottom and being inconvenient to clean, the present invention sets a filter screen 21 in the separation bin 8, and filters the mixture after conveying it to the filter screen 21. The impurities will remain in the filter screen 21. In order to facilitate the cleaning of the filter screen 21 and the impurities, the filter screen 21 is fixed with a sewage pipe 22. When discharging sewage, the sealed cabin door 23 is opened and the filter screen 21 can be pulled out.

[0023] like Figure 7 As shown, the following preferred technical solutions are provided: A plurality of groups of corrugated surge plates 24 are provided inside the filter screen 21 , and filter holes are also formed on the surge plates 24 .

[0024] Specifically, in order to accelerate the mixture to enter the filter screen 21, improve the flow effect of the mixture during transportation, and promote oil-water dispersion, the surge plate 24 is used to enhance the surge of the mixture in the separation chamber 8.

[0025] like Figures 1 to 4 As shown, the following preferred technical solutions are provided: A heating coil 10 is provided at the top of the separation chamber 8 . The heating coil 10 is connected to an external hot water supply pipeline. The heating coil 10 is close to the oil overflow port 65 .

[0026] In order to prevent the oil from freezing at the top of the separation chamber 8 and blocking the oil overflow port 65 under cold conditions, the heating coil 10 is provided with heat to prevent the oil and water at the top of the separation chamber 8 from freezing.

[0027] A U-shaped heating pipe 11 is provided at one end of the oil tank 7 near the oil drain pipe group 4. The U-shaped heating pipe 11 extends into the oil overflow tank 7 through the mounting pipe 12 and is connected to an external hot water supply pipeline.

[0028] Specifically, in order to prevent the oil from freezing in the oil overflow bin 7 and blocking the oil drain pipe when the temperature is low, thereby affecting the separation and oil draining process, the bottom space of the oil overflow bin 7 is heated by the U-shaped heating pipe 11 to prevent the oil from freezing.

[0029] like Figure 3 and 4 As shown, the following preferred technical solutions are provided: An overflow pipe 13 is provided on the overflow bin 9 , and the pipe opening of the overflow pipe 13 is directly opposite to or slightly lower than the overflow port 66 .

[0030] Specifically, in order to discharge the separated water in time and improve the recycling of water, it is convenient to transport the separated water to the spray water tower in time. By setting the overflow pipe 13, the water can be discharged when the water is about to overflow the overflow pipe 13, without repeatedly opening the drain pipe group 3.

[0031] The above shows and describes the basic principles, main features and advantages of the present application. Those skilled in the art should understand that the present application is not limited to the above-mentioned embodiments, and the above-mentioned embodiments and descriptions in the specification are only the principles of the present application. Various changes and improvements can be made without departing from the spirit and scope of the present application, and these changes and improvements all fall within the scope of the claimed present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. A high-efficiency oil-water separator, characterized in that: include: A separation kettle (1), a mixture conveying pipe group (2), a drainage pipe group (3), an oil discharge pipe group (4) and a bottom cleaning pipe group (5) for separating a mixture of oil, water and other impurities, wherein the mixture conveying pipe group (2) is connected to one side of the middle section of the separation kettle (1), the drainage pipe group (3) and the oil discharge pipe group (4) are respectively arranged at the bottom of both ends of the separation kettle (1) and are connected to the separation kettle (1), the bottom cleaning pipe group (5) is arranged at the bottom of the middle section of the separation kettle (1), an overflow plate group (6) for separating oil and water is arranged in the separation kettle (1), and the separation kettle (1) is divided into an oil overflow bin (7), a separation bin (8) and an overflow water bin (9) by the overflow plate group (6), the oil discharge pipe group (4) is connected to the oil overflow bin (7), the drainage pipe group (3) is connected to the overflow water bin (9), and the mixture conveying pipe group (2) and the bottom cleaning pipe group (5) are connected to the separation bin (8).

2. A high-efficiency oil-water separator according to claim 1, characterized in that: The overflow plate group (6) includes an oil overflow plate (61), a water overflow plate (62) and an oil separator (63). The oil overflow plate (61) and the water overflow plate (62) are arranged at intervals in the separation kettle (1) and divide the separation kettle (1) into three parts: an oil overflow bin (7), a separation bin (8) and an overflow bin (9). The oil separator (63) is located between the oil overflow plate (61) and the water overflow plate (62) and is close to the water overflow plate (62). An overflow channel (64) is formed between the oil separator (63) and the water overflow plate (62).

3. A high-efficiency oil-water separator according to claim 2, characterized in that: An oil overflow port (65) is formed between the upper end of the oil overflow plate (61) and the separation kettle (1), a water overflow port (66) is formed between the upper end of the water overflow plate (62) and the separation kettle (1), and a water outlet (67) is formed between the lower end of the oil separator plate (63) and the separation kettle (1). The oil overflow port (65) is higher than the water overflow port (66).

4. A high-efficiency oil-water separator according to claim 3, characterized in that: A filter screen (21) is provided below the mixture delivery pipe group (2). The filter screen (21) is installed at the separation chamber (8) through a sewage pipe (22). A sealed hatch (23) is installed at the mouth of the sewage pipe (22). One end of the filter screen (21) extends into the separation chamber (8) and the top of the filter screen (21) faces the mixture delivery pipe group (2) and is connected thereto. A communication port for communication with the mixture delivery pipe (2) is provided on the filter screen (21).

5. The high-efficiency oil-water separator according to claim 4, characterized in that: A plurality of groups of corrugated surge plates (24) are arranged inside the filter screen (21), and filter holes are also provided on the surge plates (24).

6. A high-efficiency oil-water separator according to claim 5, characterized in that: A heating coil (10) is provided on the top of the separation chamber (8), and the heating coil (10) is connected to an external hot water supply pipeline. The heating coil (10) is close to the oil overflow port (65).

7. The high-efficiency oil-water separator according to claim 6, characterized in that: A U-shaped heating pipe (11) is provided at one end of the oil overflow tank (7) near the oil drain pipe group (4). The U-shaped heating pipe (11) extends into the oil overflow tank (7) through the mounting pipe (12). The U-shaped heating pipe (11) is connected to an external hot water supply pipeline.

8. The high-efficiency oil-water separator according to claim 7, characterized in that: The overflow bin (9) is provided with an overflow pipe (13), and the mouth of the overflow pipe (13) is directly opposite to or slightly lower than the overflow port (66).

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