A device for filtering and purifying waste oil contaminated by high concentration of ultrafine particulate pollutants

Abstract

The present invention is a device for filtering and purifying waste oil contaminated by high-concentration ultrafine particle pollutants, comprising three high-precision, large-pollution-holding-capacity precision filters connected in series in sequence, namely, a first filter, a second filter, and a third filter, wherein the first filter, the second filter, and the third filter have the same filtering precision. In the present invention, three filters of the same precision are used in series, which effectively improves the filtering precision and filtering efficiency of the entire filtering device, effectively prolongs the replacement time of the filter element, reduces the consumption of the filter element, reduces the cost of the device, and also reduces the equipment size of the entire device, simplifying the switching operation process.

Description

Technical Field

[0001] The invention relates to the technical field of liquid filtration and purification, and in particular to a device for filtering and purifying dirty oil polluted by high-concentration ultrafine particle pollutants. Background Art

[0002] Finished oil refers to the general term for petroleum products such as gasoline, kerosene, diesel, and aviation jet fuel that are processed from crude oil. Pipeline transportation has the characteristics of safety, high efficiency, energy saving, and environmental protection, so it has been widely used in the transportation of finished oil. During the operation of the pipeline, the inner wall of the pipeline will corrode, producing particulate pollutants such as rust. At the same time, due to the long transportation distance of the long-distance pipeline, the transported oil will produce high-concentration particulate pollution; especially during the pipeline cleaning process, more polluted oil will be produced. This highly polluted oil has the significant characteristics of high particle concentration and small size. It cannot be effectively removed by natural sedimentation. It usually requires special filtering and purification technology and equipment to control its pollution to achieve the cleanliness required by the finished oil.

[0003] Existing methods for cleaning and filtering waste oil are as follows: Figure 1 As shown, the filtration accuracy of the first-stage, second-stage and third-stage filters are designed from coarse to fine: coarse (20 / 10μm), medium (5 / 3μm), and fine (1μm).

[0004] The existing method of gradient design of filtration accuracy has the following problems: 1. The technical solution of three-stage series filtration of coarse (20 / 10μm), medium (5 / 3μm) and fine (1μm) cannot meet the specified requirements for the filtration and purification effect when encountering waste oil contaminated by ultrafine particles; 2. The design of three levels of filtration accuracy leads to the need to replace the filter elements of the three filters, especially the last 1μm filter is frequently replaced. When the concentration of particulate pollutants is high, the filter element is blocked, the service life is short, the consumption is large, and the filtration cost is high; 3. The selection and combination of filters are unreasonable, the pollution holding capacity is insufficient, the service life of the filter element is short, the filter element is frequently replaced, and the filter element replacement cost and replacement operation cost are high; 4. The filter element used in the filter is unreasonable, and the contradiction between filtration accuracy and pollution holding capacity is prominent; 5. In the existing three-stage filtration, the filtration accuracy of each level is different, and each level cannot be used as a backup for each other. In order to achieve non-stop operation of replacing the filter element, two parallel filters must be set for each filter, so that a total of 6 filters are required for the three-stage filtration to ensure non-stop operation of filter element replacement, which leads to a large equipment footprint and high cost. Summary of the invention

[0005] The present invention aims to solve the deficiencies of the prior art and provide a device for filtering and purifying dirty oil contaminated by high-concentration ultrafine particle pollutants.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] A device for filtering and purifying waste oil contaminated by high-concentration ultrafine particle pollutants comprises three stages of high-precision, large-pollution-holding capacity precision filters connected in series, namely, a first filter, a second filter and a third filter, wherein the first filter, the second filter and the third filter have the same filtering precision. The three stages of filters work simultaneously to ensure the filtering precision and filtering efficiency of ultrafine particle pollutants.

[0008] A device for filtering and purifying waste oil contaminated by high-concentration ultrafine particle pollutants comprises four high-precision, large-pollution-holding-capacity precision filters connected in series in sequence, namely a first filter, a second filter, a third filter and a fourth filter. Any three of the four filters can be used at the same time and the other one is a spare.

[0009] The inlet ends of the first filter, the second filter, the third filter and the fourth filter are all provided with inlet valves, and the outlet ends are all provided with outlet valves. The first filter, the second filter, the third filter and the fourth filter are all provided with a plurality of filter elements, and the filter elements inside the four filters have the same filtering accuracy. The first filter, the second filter, the third filter and the fourth filter are respectively connected in parallel with a bypass pipe, and the bypass pipe is provided with a bypass valve. The four bypass pipes are connected in sequence according to the connection sequence of the four filters.

[0010] The filter uses multiple filter elements with a diameter of 150mm. The oil flows from the outside to the inside. The filter's pollution capacity is above 12g / L / min.

[0011] The filtering efficiency of the filter element for solid particles larger than 1 μm is above 80%.

[0012] The filters all include a first shell, a first feed pipe and a first discharge pipe are connected to the lower part of the first shell, one end of the first feed pipe is connected to the interior of the first shell, and the other end is a first feed port, a confluence tray is provided at the lower part of the first shell, the confluence tray is a cylindrical structure with both ends blocked, one end of the first discharge pipe is connected to the bottom wall of the confluence tray, and the other end is a first discharge port and extends to the outside of the first shell, a plurality of mounting holes are provided on the top wall of the confluence tray, a plurality of filter elements are installed on the upper part of the mounting holes, and the top end of the filter element is a blind end.

[0013] The filters all include a second shell, a first tube sheet is provided in the upper part of the second shell, the first tube sheet divides the second shell into a first cavity above and a second cavity below, a plurality of mounting holes are provided on the first tube sheet, a filter element is installed at the lower part of the mounting holes, the opening of the filter element faces the first cavity and the lower end is a blind end, a second feed pipe and a second discharge pipe are fixed to the lower part of the second shell, one end of the second feed pipe is connected to the second shell, and the other end is a second feed port, one end of the second discharge pipe is fixed to the first tube sheet and connected to the first cavity, and the other end is a second discharge port and extends out of the second shell.

[0014] The filters all include a third shell, a second tube sheet is fixedly provided in the lower part of the third shell, the second tube sheet divides the third shell into a third cavity above and a fourth cavity below, a plurality of mounting holes are opened on the second tube sheet, a plurality of filter elements are fixed on the upper part of the mounting holes, the lower end of the filter element opens toward the fourth cavity and the upper end is a blind end, a third feed pipe and a third discharge pipe are fixed to the lower part of the third shell, the upper end of the third feed pipe extends into the upper part of the third cavity, the lower end is the third feed port and extends out of the bottom wall of the third shell, one end of the third discharge pipe is connected with the fourth cavity, and the other end is the third discharge port.

[0015] The beneficial effects of the present invention are as follows: 1. The use of three filters of the same precision in series effectively improves the filtration precision and filtration efficiency of the entire filtration device, greatly improves the cleanliness of the filtered oil, and well solves the problem of filtering and purifying dirty oil containing ultrafine particle pollutants; 2. The use of high-precision and large-pollution-holding capacity filters has a service life (replacement time) of the filter element that is 3 to 5 times that of conventional filters, effectively extending the replacement time of the filter element, greatly reducing the replacement workload of the filter element, and also reducing the consumption of the filter element; 3. The traditional filtration scheme (the filtration precision of the three filters is coarse, medium and fine according to the The three filters of the traditional filter design may be quickly blocked, while the first filter of the filtering scheme of the present invention (all three filters are precision filters) may be quickly blocked, while the second and third filters are blocked more slowly, thereby reducing the consumption of filter elements in general; 4. The traditional filtering scheme requires 6 filters (three filters working in series, each consisting of two filters in parallel, 3 in use and 3 as spare during operation) to achieve non-stop operation when replacing filter elements; while the filtering scheme of the present invention only requires 4 filters (4 filters in series, only one filter is needed for each, 3 in use and 1 as spare during operation) to achieve non-stop operation when replacing filter elements. This scheme reduces the cost of the device, reduces the equipment size of the entire device, and simplifies the switching operation process. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of a filtering device for filtering according to the accuracy level in the prior art;

[0017] Figure 2 is a schematic diagram of a filtering device in specific embodiment 2 of the present invention;

[0018] Figure 3 This is a schematic diagram of the liquid flow direction in the filter device in the specific embodiment 2 of the present invention;

[0019] Figure 4 This is a schematic diagram of the first installation structure inside the filter of the present invention;

[0020] Figure 5 This is a schematic diagram of the second installation structure inside the filter of the present invention;

[0021] Figure 6 This is a schematic diagram of the third installation structure inside the filter of the present invention;

[0022] Figure 7 It is a schematic diagram of the top view of the structure of the busbar of the present invention;

[0023] In the figure: 1, first filter; 2, second filter; 3, third filter; 4, fourth filter; 5, inlet valve; 6, bypass valve; 7, outlet valve; 8, bypass pipe; 1-1, first feed port; 1-2, first shell; 1-3, confluence tray; 1-4, first discharge port; 1-5, first feed pipe; 1-6, first discharge pipe; 1-7, filter element; 1-8, mounting hole; 2-1, second feed port; 2-2, second shell; 2-3, first tube sheet; 2-4, second discharge port; 2-5, second feed pipe; 2-6, second discharge pipe; 3-1, third feed port; 3-2, third shell; 3-3, second tube sheet; 3-4, third discharge port; 3-5, third feed pipe; 3-6, third discharge pipe;

[0024] The following is a detailed description of the embodiments of the present invention with reference to the accompanying drawings. DETAILED DESCRIPTION

[0025] The present invention will be further described below in conjunction with embodiments: Specific embodiment 1:

[0027] like Figure 4 and Figure 7 As shown, a device for filtering and purifying waste oil contaminated by high-concentration ultrafine particle pollutants includes three high-precision, large-pollution-holding-capacity precision filters connected in series in sequence, namely a first filter 1, a second filter 2 and a third filter 3. The first filter 1, the second filter 2 and the third filter 3 have the same filtering accuracy.

[0028] The filter uses multiple filter elements 1-7 with a diameter of 150 mm. The oil flows from the outside to the inside. The filter has a dirt holding capacity of more than 12 g / L / min, and is a filter with a large dirt holding capacity.

[0029] The filter element 1-7 has a filtration efficiency of more than 80% for solid particles larger than 1 μm, which is a high-precision filtration.

[0030] The filters all include a first shell 1-2, a first feed pipe 1-5 and a first discharge pipe 1-6 are connected to the lower part of the first shell 1-2, one end of the first feed pipe 1-5 is connected to the inside of the first shell 1-2, and the other end is a first feed port 1-1, a confluence tray 1-3 is provided in the lower part of the first shell 1-2, the confluence tray 1-3 is a cylindrical structure with both ends blocked, one end of the first discharge pipe 1-6 is connected to the bottom wall of the confluence tray 1-3, and the other end is a first discharge port 1-4 extending to the outside of the first shell 1-2, a plurality of mounting holes 1-8 are provided on the top wall of the confluence tray 1-3, a plurality of filter elements 1-7 are installed on the upper part of the mounting holes 1-8, and the top end of the filter element 1-7 is a blind end. Specific embodiment 2:

[0032] like Figure 2 , Figure 3 , Figure 5 and Figure 7 As shown, a device for filtering and purifying waste oil contaminated by high-concentration ultrafine particle pollutants includes four high-precision, large-pollution-holding capacity precision filters connected in series in sequence, namely a first filter 1, a second filter 2, a third filter 3 and a fourth filter 4. Any three of the four filters can be used at the same time and the other one is a spare.

[0033] The inlet ends of the first filter 1, the second filter 2, the third filter 3 and the fourth filter 4 are each provided with an inlet valve 5, and the outlet ends are each provided with an outlet valve 7. The first filter 1, the second filter 2, the third filter 3 and the fourth filter 4 are each provided with a plurality of filter elements 1-7, and the filtering precision of the filter elements 1-7 inside the four filters is the same. The first filter 1, the second filter 2, the third filter 3 and the fourth filter 4 are respectively connected in parallel with a bypass pipe 8, and the bypass pipe 8 is provided with a bypass valve 6. The four bypass pipes 8 are connected in sequence according to the connection sequence of the four filters.

[0034] The filter uses multiple filter elements 1-7 with a diameter of 150 mm. The oil flows from the outside to the inside. The filter has a dirt holding capacity of more than 12 g / L / min.

[0035] The filtering efficiency of the filter element 1-7 for solid particles larger than 1 μm is above 80%.

[0036] The filters all include a second shell 2-2, a first tube sheet 2-3 is provided in the upper part of the second shell 2-2, the first tube sheet 2-3 divides the second shell 2-2 into a first cavity at the top and a second cavity at the bottom, a plurality of mounting holes 1-8 are provided on the first tube sheet 2-3, a filter element 1-7 is installed at the lower part of the mounting holes 1-8, the opening of the filter element 1-7 faces the first cavity and the lower end is a blind end, a second feed pipe 2-5 and a second discharge pipe 2-6 are fixed to the lower part of the second shell 2-2, one end of the second feed pipe 2-5 is connected to the inside of the second shell 2-2, and the other end is a second feed port 2-1, one end of the second discharge pipe 2-6 is fixed on the first tube sheet 2-3 and connected to the first cavity, and the other end is a second discharge port 2-4 and extends out of the second shell 2-2. Specific embodiment 3:

[0038] like Figure 2 , Figure 3 , Figure 6 and Figure 7 As shown, a device for filtering and purifying waste oil contaminated by high-concentration ultrafine particle pollutants includes four high-precision, large-pollution-holding capacity precision filters connected in series in sequence, namely a first filter 1, a second filter 2, a third filter 3 and a fourth filter 4. Any three of the four filters can be used at the same time and the other one is a spare.

[0039] The inlet ends of the first filter 1, the second filter 2, the third filter 3 and the fourth filter 4 are each provided with an inlet valve 5, and the outlet ends are each provided with an outlet valve 7. The first filter 1, the second filter 2, the third filter 3 and the fourth filter 4 are each provided with a plurality of filter elements 1-7, and the filtering precision of the filter elements 1-7 inside the four filters is the same. The first filter 1, the second filter 2, the third filter 3 and the fourth filter 4 are respectively connected in parallel with a bypass pipe 8, and the bypass pipe 8 is provided with a bypass valve 6. The four bypass pipes 8 are connected in sequence according to the connection sequence of the four filters.

[0040] The filter uses multiple filter elements 1-7 with a diameter of 150 mm. The oil flows from the outside to the inside. The filter has a dirt holding capacity of more than 12 g / L / min.

[0041] The filtering efficiency of the filter element 1-7 for solid particles larger than 1 μm is above 80%.

[0042] The filters all include a third shell 3-2, a second tube sheet 3-3 is fixedly provided in the lower part of the third shell 3-2, the second tube sheet 3-3 divides the third shell 3-2 into a third cavity at the top and a fourth cavity at the bottom, a plurality of mounting holes 1-8 are opened on the second tube sheet 3-3, a plurality of filter elements 1-7 are fixed on the upper part of the mounting holes 1-8, the lower end of the filter element 1-7 opens toward the fourth cavity and the upper end is a blind end, a third feed pipe 3-5 and a third discharge pipe 3-6 are fixed to the lower part of the third shell 3-2, the upper end of the third feed pipe 3-5 extends into the upper part of the third cavity, the lower end is the third feed port 3-1 and extends out of the bottom wall of the third shell 3-2, one end of the third discharge pipe 3-6 is connected to the fourth cavity, and the other end is the third discharge port 3-4.

[0043] The filtering accuracy of the four filters in the present invention is consistent. All four filters are precision filters with high accuracy and large dirt holding capacity. During filtering, three of the filters are used, and the other one is a spare filter. The operation of switching the filters is achieved by controlling the opening and closing of related valves.

[0044] First, use the first filter 1, the second filter 2 and the third filter 3 for filtering. The fourth filter 4 is a spare filter. When in use, close the bypass valve 6 on the bypass pipe 8 connected in parallel with the first filter 1, the second filter 2 and the third filter 3 respectively, open the inlet valve 5 and the outlet valve 7 connected on both sides of the first filter 1, the second filter 2 and the third filter 3, open the bypass valve 6 on the bypass pipe 8 connected in parallel with the fourth filter 4, and close the inlet valve 5 of the fourth filter 4. At this time, only the first filter 1, the second filter 2 and the third filter 3 are involved in the filtration.

[0045] When the first filter 1 is blocked (the pressure difference between the inlet and outlet increases) after running for a period of time and the filter element 1-7 needs to be replaced, the bypass valve 6 on the bypass pipe 8 connected in parallel with the fourth filter 4 is closed, and the inlet valve 5 of the fourth filter 4 is opened. The inlet valve 5 of the first filter 1 is closed, and the bypass valve 6 on the bypass pipe 8 connected in parallel with the first filter 1 is opened. At this time, the second filter 2, the third filter 3 and the fourth filter 4 work in series, and the filter element of the first filter 1 can be replaced and kept in standby use.

[0046] When the second filter 2 is clogged, close the inlet valve 5 of the second filter 2, open the bypass valve 6 on the bypass pipe 8 connected in parallel with the second filter 2, and open the inlet valve 5 of the first filter 1, close the bypass valve 6 on the bypass pipe 8 connected in parallel with the first filter 1. At this time, the first filter 1, the third filter 3 and the fourth filter 4 work in series, and the filter element of the second filter 2 can be replaced and kept in reserve.

[0047] When the third filter 3 is clogged, close the inlet valve 5 of the third filter 3, open the bypass valve 6 on the bypass pipe 8 in parallel with the third filter 3, open the inlet valve 5 of the second filter 2, and close the bypass valve 6 on the bypass pipe 8 in parallel with the second filter 2. At this time, the first filter 1, the second filter 2 and the fourth filter 4 work in series, and the filter element of the third filter 3 can be replaced and kept in reserve.

[0048] When the fourth filter 4 is clogged, close the inlet valve 5 of the fourth filter 4, open the bypass valve 6 on the bypass pipe 8 connected in parallel with the fourth filter 4, open the inlet valve 5 of the third filter 3, close the bypass valve 6 on the bypass pipe 8 connected in parallel with the third filter 3, and now the first filter 1, the second filter 2 and the third filter 3 work in series, and the filter element of the fourth filter 4 can be replaced and kept in reserve.

[0049] The present invention has the following advantages: 1. Three filters of the same precision are used in series, which effectively improves the filtration precision and filtration efficiency of the entire filtration device, greatly improves the cleanliness of the filtered oil, and well solves the problem of filtering and purifying dirty oil containing ultrafine particle pollutants; 2. The use of high-precision and large-pollution-holding capacity filters has a service life (replacement time) of 3 to 5 times that of conventional filters, effectively extending the replacement time of the filter element, greatly reducing the replacement workload of the filter element, and also reducing the consumption of the filter element; 3. The traditional filtration scheme (the filtration precision of the three filters is coarse, medium and fine according to the The three filters of the traditional filter design may be quickly blocked, while the first filter of the filtering scheme of the present invention (all three filters are precision filters) may be quickly blocked, while the second and third filters are blocked more slowly, thereby reducing the consumption of filter elements overall; 4. The traditional filtering scheme requires 6 filters (three filters working in series, each consisting of two filters in parallel, 3 in use and 3 as spare during operation) to achieve non-stop operation when replacing filter elements; while the filtering scheme of the present invention only requires 4 filters (4 filters in series, only one filter is needed for each, 3 in use and 1 as spare during operation) to achieve non-stop operation when replacing filter elements. This scheme reduces the cost of the device, reduces the equipment size of the entire device, reduces the floor space, and simplifies the switching operation process.

[0050] The above is an exemplary description of the present invention. Obviously, the specific implementation of the present invention is not limited to the above-mentioned method. As long as various improvements are made using the method concept and technical solution of the present invention, or they are directly applied to other occasions without improvement, they are all within the protection scope of the present invention.

Claims

1. A device for filtering and purifying waste oil contaminated by high-concentration ultrafine particle pollutants, characterized in that: It comprises four high-precision, large-pollution-holding-capacity precision filters connected in series, namely a first filter (1), a second filter (2), a third filter (3) and a fourth filter (4). Among the four filters, any three can be used at the same time and the other one is a spare. A plurality of filter elements (1-7) are arranged inside the four filters, and the filter elements (1-7) inside the four filters have the same filtering accuracy, and the filtering efficiency of the filter elements (1-7) for solid particles larger than 1 μm is more than 80%; The pollution holding capacity of the four filters is above 12 g / (L / min); The inlet ends of the first filter (1), the second filter (2), the third filter (3) and the fourth filter (4) are all provided with inlet valves (5), and the outlet ends are all provided with outlet valves (7); the first filter (1), the second filter (2), the third filter (3) and the fourth filter (4) are each connected in parallel with a bypass pipe (8), the bypass pipe (8) is provided with a bypass valve (6), and the four bypass pipes (8) are connected in sequence according to the connection sequence of the four filters; The filter uses multiple filter elements (1-7) with a diameter of 150 mm, and the oil flows from the outside to the inside.

2. The device for filtering and purifying waste oil contaminated by high-concentration ultrafine particle pollutants according to claim 1, characterized in that: The filter comprises a first shell (1-2), the lower part of which is connected to a first feed pipe (1-5) and a first discharge pipe (1-6), one end of the first feed pipe (1-5) is connected to the inside of the first shell (1-2), and the other end is a first feed port (1-1), a confluence tray (1-3) is provided in the lower part of the first shell (1-2), the confluence tray (1-3) is a cylindrical structure with both ends blocked, one end of the first discharge pipe (1-6) is connected to the bottom wall of the confluence tray (1-3), and the other end is a first discharge port (1-4) extending to the outside of the first shell (1-2), a plurality of mounting holes (1-8) are provided on the top wall of the confluence tray (1-3), a plurality of filter elements (1-7) are installed on the upper part of the mounting holes (1-8), and the top end of the filter element (1-7) is a blind end.

3. The device for filtering and purifying waste oil contaminated by high-concentration ultrafine particle pollutants according to claim 1, characterized in that: The filter comprises a second shell (2-2), wherein a first tube sheet (2-3) is provided at the upper part of the second shell (2-2), and the first tube sheet (2-3) divides the second shell (2-2) into an upper first cavity and a lower second cavity, and a plurality of mounting holes (1-8) are provided on the first tube sheet (2-3), and a filter element (1-7) is installed at the lower part of the mounting hole (1-8), and the opening of the filter element (1-7) faces the first cavity and the lower end is a blind end, and a second feed pipe (2-5) and a second discharge pipe (2-6) are fixed at the lower part of the second shell (2-2), one end of the second feed pipe (2-5) is connected to the second shell (2-2), and the other end is a second feed port (2-1), and one end of the second discharge pipe (2-6) is fixed on the first tube sheet (2-3) and connected to the first cavity, and the other end is a second discharge port (2-4) and extends out of the second shell (2-2).

4. The device for filtering and purifying waste oil contaminated by high-concentration ultrafine particle pollutants according to claim 1, characterized in that: The filter comprises a third shell (3-2), a second tube sheet (3-3) is fixedly provided at the lower part of the third shell (3-2), the second tube sheet (3-3) divides the third shell (3-2) into an upper third cavity and a lower fourth cavity, a plurality of mounting holes (1-8) are provided on the second tube sheet (3-3), a plurality of filter elements (1-7) are fixedly provided at the upper part of the mounting holes (1-8), the lower end of the filter element (1-7) opens toward the fourth cavity and the upper end is a blind end, a third feed pipe (3-5) and a third discharge pipe (3-6) are fixedly provided at the lower part of the third shell (3-2), the upper end of the third feed pipe (3-5) extends into the upper part of the third cavity, the lower end is a third feed port (3-1) and extends out of the bottom wall of the third shell (3-2), one end of the third discharge pipe (3-6) is connected to the fourth cavity, and the other end is a third discharge port (3-4).

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