Grease cleaning device for olefin separation

Abstract

The utility model discloses a butter cleaning device for olefin separation, which comprises a waste alkali tank, a heating coil is arranged at the bottom of the waste alkali tank, the upper end of one side of the waste alkali tank is connected with an alkali washing tower through a pipeline, and a first valve and a fourth valve are arranged on the pipeline between the alkali washing tower and the waste alkali tank. The bottom of the side, away from the alkaline washing tower, of the waste alkali tank is connected with a waste alkali pump through a pipeline, a tenth valve is arranged on the pipeline between the waste alkali tank and the waste alkali pump, the upper end of the side, away from the alkaline washing tower, of the waste alkali tank is communicated with a first grease discharge pipe, and a seventh valve is arranged on the first grease discharge pipe. The device is simple in structure, reasonable in design, simple to operate, short in cleaning time, safe and free of operation risk, the labor intensity of workers is reduced, and the grease is not required to be processed by opening holes in the waste alkali tank under pressure.

Description

Technical Field

[0001] The utility model belongs to the technical field of oil storage tank cleaning and relates to a butter cleaning device for olefin separation. Background Art

[0002] The alkali scrubber in the olefin separation unit primarily removes carbon dioxide from the product gas. During daily production, approximately 30 tons of waste alkali liquor is generated daily. The oil in this waste alkali liquor is primarily butter, an oxygenated organic mixture that forms a yellow, viscous substance or solid when in contact with air. The waste alkali liquor and the small amount of butter it carries along are piped to waste alkali tanks at the olefin separation site. The waste alkali liquor is then transported to the thermal power and gasification units by truck or pump. However, the butter carried along with the alkali liquor, due to its long-term accumulation and undischarged, has accumulated at the bottom of the tanks, reducing tank capacity and impacting the long-term operation of the unit.

[0003] Furthermore, butter often exists as floating oil and emulsified oil. Because the density of butter is similar to that of water, oil-water separation is difficult and its biodegradability is poor. This severely impacts subsequent wastewater treatment processes and can cause significant secondary pollution. The effectiveness of oil removal directly impacts subsequent wastewater treatment. The high chemical oxygen demand (COD) in waste caustic soda is related to its oil content. Reducing the oil content can reduce the COD to a certain extent, but the COD remains high after oil removal, making conventional biodegradation difficult. To ensure stable production, the bottom-heating steam coils are appropriately opened to increase the tank temperature, reducing the butter viscosity and improving its fluidity. The bottom-of-tank discharge port is then connected to a pipeline, manually discharging the butter into a box for harmless disposal. However, pressurized tapping of the waste caustic soda tank to process the butter is cumbersome, time-consuming, and poses certain safety risks. Utility Model Content

[0004] The utility model aims to provide a butter cleaning device for olefin separation, which solves the problem in the prior art that a waste alkali tank needs to be opened under pressure when cleaning the butter.

[0005] The technical solution adopted by the utility model is a butter cleaning device for olefin separation, comprising a waste alkali tank, a heating coil being arranged at the bottom of the waste alkali tank, an upper end of one side of the waste alkali tank being connected to an alkali washing tower through a pipeline, a first valve and a fourth valve being arranged on the pipeline between the alkali washing tower and the waste alkali tank, a waste alkali pump being connected to the bottom of the waste alkali tank away from the alkali washing tower through a pipeline, a tenth valve being arranged on the pipeline between the waste alkali tank and the waste alkali pump, a first butter discharge pipe being communicated with the upper end of the side of the waste alkali tank away from the alkali washing tower, and a seventh valve being arranged on the first butter discharge pipe.

[0006] The utility model is also characterized in that:

[0007] The heating coil is steam heated, and the two interfaces of the heating coil are respectively fixedly connected with a steam inlet pipe and a liquid outlet pipe. The steam inlet pipe is provided with a fifth valve, and the liquid outlet pipe is provided with a sixth valve.

[0008] An inhibitor pipe is connected between the first valve and the fourth valve, an injection pump and a butter inhibitor tank are sequentially arranged on the inhibitor pipe, a second valve is arranged between the injection pump and the first valve, and a third valve is arranged between the injection pump and the butter inhibitor tank.

[0009] An eleventh valve is also provided on the pipeline on the side of the waste alkali pump away from the tenth valve.

[0010] The lower end of the waste alkali tank away from the alkali washing tower is externally connected to a second butter discharge pipe, and an eighth valve is arranged on the second butter discharge pipe.

[0011] The eighth valve and the seventh valve are arranged in parallel.

[0012] The first butter discharge pipe and the second butter discharge pipe are commonly connected to a third butter discharge pipe.

[0013] A ninth valve is provided on the third butter discharge pipe.

[0014] A temperature gauge is installed on the lower middle part of the side of the waste alkali tank body.

[0015] The beneficial effects of the utility model are:

[0016] The present invention provides a butter cleaning device for olefin separation with a simple structure and a rational design. The provision of a butter inhibitor tank eliminates the need for manual addition of butter inhibitor by cleaning personnel, and allows for addition without stopping the machine, reducing labor intensity and ensuring safety and reliability. Furthermore, the provision of a butter discharge pipe on one side of the waste alkali tank eliminates the need for pressurized tapping of the waste alkali tank for butter treatment, resulting in simple operation, short cleaning time, and a safe, risk-free operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 The utility model is a schematic structural diagram of a butter cleaning device for olefin separation.

[0018] In the figure, 1. alkali washing tower; 2. first valve; 3. second valve; 4. injection pump; 5. third valve; 6. butter inhibitor tank; 7. fourth valve; 8. fifth valve; 9. heating coil; 10. sixth valve; 11. thermometer; 12. waste alkali tank; 13. seventh valve; 14. eighth valve; 15. ninth valve; 16. tenth valve; 17. waste alkali pump; 18. eleventh valve; 19. steam inlet pipe; 20. liquid outlet pipe; 21. inhibitor pipe; 22. butter first discharge pipe; 23. butter second discharge pipe; 24. butter third discharge pipe. DETAILED DESCRIPTION

[0019] The present invention will be described in detail below with reference to the accompanying drawings and specific implementation methods.

[0020] like Figure 1 As shown, a butter cleaning device for olefin separation includes a waste alkali tank 12, a heating coil 9 is provided at the bottom of the waste alkali tank 12, an upper end of one side of the waste alkali tank 12 is connected to an alkali washing tower 1 through a pipeline, a first valve 2 and a fourth valve 7 are provided on the pipeline between the alkali washing tower 1 and the waste alkali tank 12, a waste alkali pump 17 is connected to the bottom of the waste alkali tank 12 away from the alkali washing tower 1 through a pipeline, a tenth valve 16 is provided on the pipeline between the waste alkali tank 12 and the waste alkali pump 17, and a first butter discharge pipe 22 is connected to the upper end of the waste alkali tank 12 away from the alkali washing tower 1, and a seventh valve 13 is provided on the first butter discharge pipe 22.

[0021] The heating coil 9 is steam heated, and the two interfaces of the heating coil 9 are respectively fixedly connected with a steam inlet pipe 19 and a liquid outlet pipe 20 . The steam inlet pipe 19 is provided with a fifth valve 8 , and the liquid outlet pipe 20 is provided with a sixth valve 10 .

[0022] An inhibitor pipe 21 is connected between the first valve 2 and the fourth valve 7. An injection pump 4 and a butter inhibitor tank 6 are sequentially arranged on the inhibitor pipe 21. A second valve 3 is arranged between the injection pump 4 and the first valve 2. A third valve 5 is arranged between the injection pump 4 and the butter inhibitor tank 6.

[0023] An eleventh valve 18 is further provided on the pipeline of the waste alkali pump 17 away from the tenth valve 16 .

[0024] A second butter discharge pipe 23 is externally connected to the lower end of the waste alkali tank 12 on the side away from the alkali washing tower 1 , and an eighth valve 14 is provided on the second butter discharge pipe 23 .

[0025] The eighth valve 14 is connected in parallel with the seventh valve 13. The first butter discharge pipe 22 and the second butter discharge pipe 23 are connected to a third butter discharge pipe 24. The third butter discharge pipe 24 is provided with a ninth valve 15.

[0026] A thermometer 11 is installed at the lower middle part of the side of the waste alkali tank 12.

[0027] During operation, the waste alkali produced in the olefin separation enters the waste alkali tank 12 from the alkali washing tower 1. At this time, the second valve 3 and the third valve 5 are opened to open the butter inhibitor injection pipeline, and then the injection pump 4 is started. The injection pump 4 provides power for the inhibitor pipe 21 to inject the butter inhibitor from the butter inhibitor tank 6 into the waste alkali tank 12. As the daily waste alkali liquid is about 30t / d, the injection amount of butter inhibitor is about 1 ton.

[0028] Open the fifth valve 8 and the sixth valve 10 connected to the heating coil 9, and inject steam into the steam inlet pipe 19. The steam enters the heating coil 9 and heats the bottom of the waste alkali tank 12. After releasing heat, the steam condenses into condensate and is discharged through the liquid outlet pipe 20. A thermometer 11, model TI440, is installed in the lower middle portion of the side of the waste alkali tank 12. The temperature of the thermometer 11 is controlled at 60-70°C. When the temperature reaches 60-70°C, stop injecting steam into the steam inlet pipe 19, which in turn stops heating the waste alkali tank 12 by the heating coil 9. When the temperature reaches 60-70°C, the butter in the waste alkali tank 12 softens into a paste due to the combined effects of the butter inhibitor and the high temperature, and floats above the waste alkali liquid in the tank 12.

[0029] In addition, the utility model adds a discharge line for the butter in the waste alkali tank 12, specifically, two 4-inch openings are opened in the waste alkali tank 12, the upper opening is connected to the first butter discharge pipe 22, and the seventh valve 13 is installed on the first butter discharge pipe 22, and the lower opening is connected to the second butter discharge pipe 23, and the eighth valve 14 is installed on the second butter discharge pipe 23. The first butter discharge pipe 22 and the second butter discharge pipe 23 are commonly connected to the third butter discharge pipe 24, and the ninth valve 15 is installed on the third butter discharge pipe 24. The butter is discharged from the system through the third butter discharge pipe 24.

[0030] When the liquid level of the waste alkali tank 12 is high, the seventh valve 13 and the ninth valve 15 can be opened to discharge the butter; when the liquid level of the waste alkali tank 12 is low, the eighth valve 14 and the ninth valve 15 can be opened to discharge the butter; when the liquid level of the waste alkali tank 12 is between the first butter discharge pipe 22 and the second butter discharge pipe 23, waste alkali liquid can be input into the waste alkali tank 12, or the tenth valve 16, the waste alkali pump 17 and the eleventh valve 18 can be opened to discharge part of the waste alkali liquid in the waste alkali tank 12.

[0031] Example 1

[0032] like Figure 1 As shown, a butter cleaning device for olefin separation includes a waste alkali tank 12, a heating coil 9 is provided at the bottom of the waste alkali tank 12, an upper end of one side of the waste alkali tank 12 is connected to an alkali washing tower 1 through a pipeline, a first valve 2 and a fourth valve 7 are provided on the pipeline between the alkali washing tower 1 and the waste alkali tank 12, a waste alkali pump 17 is connected to the bottom of the waste alkali tank 12 away from the alkali washing tower 1 through a pipeline, a tenth valve 16 is provided on the pipeline between the waste alkali tank 12 and the waste alkali pump 17, and a first butter discharge pipe 22 is connected to the upper end of the waste alkali tank 12 away from the alkali washing tower 1, and a seventh valve 13 is provided on the first butter discharge pipe 22.

[0033] The heating coil 9 is steam heated, and the two interfaces of the heating coil 9 are respectively fixedly connected with a steam inlet pipe 19 and a liquid outlet pipe 20 . The steam inlet pipe 19 is provided with a fifth valve 8 , and the liquid outlet pipe 20 is provided with a sixth valve 10 .

[0034] Example 2

[0035] like Figure 1 As shown, a butter cleaning device for olefin separation includes a waste alkali tank 12, a heating coil 9 is provided at the bottom of the waste alkali tank 12, an upper end of one side of the waste alkali tank 12 is connected to an alkali washing tower 1 through a pipeline, a first valve 2 and a fourth valve 7 are provided on the pipeline between the alkali washing tower 1 and the waste alkali tank 12, a waste alkali pump 17 is connected to the bottom of the waste alkali tank 12 away from the alkali washing tower 1 through a pipeline, a tenth valve 16 is provided on the pipeline between the waste alkali tank 12 and the waste alkali pump 17, and a first butter discharge pipe 22 is connected to the upper end of the waste alkali tank 12 away from the alkali washing tower 1, and a seventh valve 13 is provided on the first butter discharge pipe 22.

[0036] The heating coil 9 is steam heated, and the two interfaces of the heating coil 9 are respectively fixedly connected with a steam inlet pipe 19 and a liquid outlet pipe 20 . The steam inlet pipe 19 is provided with a fifth valve 8 , and the liquid outlet pipe 20 is provided with a sixth valve 10 .

[0037] An inhibitor pipe 21 is connected between the first valve 2 and the fourth valve 7. An injection pump 4 and a butter inhibitor tank 6 are sequentially arranged on the inhibitor pipe 21. A second valve 3 is arranged between the injection pump 4 and the first valve 2. A third valve 5 is arranged between the injection pump 4 and the butter inhibitor tank 6.

[0038] Example 3

[0039] like Figure 1 As shown, a butter cleaning device for olefin separation includes a waste alkali tank 12, a heating coil 9 is provided at the bottom of the waste alkali tank 12, an upper end of one side of the waste alkali tank 12 is connected to an alkali washing tower 1 through a pipeline, a first valve 2 and a fourth valve 7 are provided on the pipeline between the alkali washing tower 1 and the waste alkali tank 12, a waste alkali pump 17 is connected to the bottom of the waste alkali tank 12 away from the alkali washing tower 1 through a pipeline, a tenth valve 16 is provided on the pipeline between the waste alkali tank 12 and the waste alkali pump 17, and a first butter discharge pipe 22 is connected to the upper end of the waste alkali tank 12 away from the alkali washing tower 1, and a seventh valve 13 is provided on the first butter discharge pipe 22.

[0040] The heating coil 9 is steam heated, and the two interfaces of the heating coil 9 are respectively fixedly connected with a steam inlet pipe 19 and a liquid outlet pipe 20 . The steam inlet pipe 19 is provided with a fifth valve 8 , and the liquid outlet pipe 20 is provided with a sixth valve 10 .

[0041] An inhibitor pipe 21 is connected between the first valve 2 and the fourth valve 7. An injection pump 4 and a butter inhibitor tank 6 are sequentially arranged on the inhibitor pipe 21. A second valve 3 is arranged between the injection pump 4 and the first valve 2. A third valve 5 is arranged between the injection pump 4 and the butter inhibitor tank 6.

[0042] An eleventh valve 18 is further provided on the pipeline of the waste alkali pump 17 away from the tenth valve 16 .

[0043] Example 4

[0044] like Figure 1 As shown, a butter cleaning device for olefin separation includes a waste alkali tank 12, a heating coil 9 is provided at the bottom of the waste alkali tank 12, an upper end of one side of the waste alkali tank 12 is connected to an alkali washing tower 1 through a pipeline, a first valve 2 and a fourth valve 7 are provided on the pipeline between the alkali washing tower 1 and the waste alkali tank 12, a waste alkali pump 17 is connected to the bottom of the waste alkali tank 12 away from the alkali washing tower 1 through a pipeline, a tenth valve 16 is provided on the pipeline between the waste alkali tank 12 and the waste alkali pump 17, and a first butter discharge pipe 22 is connected to the upper end of the waste alkali tank 12 away from the alkali washing tower 1, and a seventh valve 13 is provided on the first butter discharge pipe 22.

[0045] The heating coil 9 is steam heated, and the two interfaces of the heating coil 9 are respectively fixedly connected with a steam inlet pipe 19 and a liquid outlet pipe 20 . The steam inlet pipe 19 is provided with a fifth valve 8 , and the liquid outlet pipe 20 is provided with a sixth valve 10 .

[0046] An inhibitor pipe 21 is connected between the first valve 2 and the fourth valve 7. An injection pump 4 and a butter inhibitor tank 6 are sequentially arranged on the inhibitor pipe 21. A second valve 3 is arranged between the injection pump 4 and the first valve 2. A third valve 5 is arranged between the injection pump 4 and the butter inhibitor tank 6.

[0047] An eleventh valve 18 is further provided on the pipeline of the waste alkali pump 17 away from the tenth valve 16 .

[0048] A second butter discharge pipe 23 is externally connected to the lower end of the waste alkali tank 12 on the side away from the alkali washing tower 1 , and an eighth valve 14 is provided on the second butter discharge pipe 23 .

[0049] Example 5

[0050] like Figure 1 As shown, a butter cleaning device for olefin separation includes a waste alkali tank 12, a heating coil 9 is provided at the bottom of the waste alkali tank 12, an upper end of one side of the waste alkali tank 12 is connected to an alkali washing tower 1 through a pipeline, a first valve 2 and a fourth valve 7 are provided on the pipeline between the alkali washing tower 1 and the waste alkali tank 12, a waste alkali pump 17 is connected to the bottom of the waste alkali tank 12 away from the alkali washing tower 1 through a pipeline, a tenth valve 16 is provided on the pipeline between the waste alkali tank 12 and the waste alkali pump 17, and a first butter discharge pipe 22 is connected to the upper end of the waste alkali tank 12 away from the alkali washing tower 1, and a seventh valve 13 is provided on the first butter discharge pipe 22.

[0051] The heating coil 9 is steam heated, and the two interfaces of the heating coil 9 are respectively fixedly connected with a steam inlet pipe 19 and a liquid outlet pipe 20 . The steam inlet pipe 19 is provided with a fifth valve 8 , and the liquid outlet pipe 20 is provided with a sixth valve 10 .

[0052] An inhibitor pipe 21 is connected between the first valve 2 and the fourth valve 7. An injection pump 4 and a butter inhibitor tank 6 are sequentially arranged on the inhibitor pipe 21. A second valve 3 is arranged between the injection pump 4 and the first valve 2. A third valve 5 is arranged between the injection pump 4 and the butter inhibitor tank 6.

[0053] An eleventh valve 18 is further provided on the pipeline of the waste alkali pump 17 away from the tenth valve 16 .

[0054] A second butter discharge pipe 23 is externally connected to the lower end of the waste alkali tank 12 on the side away from the alkali washing tower 1 , and an eighth valve 14 is provided on the second butter discharge pipe 23 .

[0055] The eighth valve 14 is connected in parallel with the seventh valve 13. The first butter discharge pipe 22 and the second butter discharge pipe 23 are connected to a third butter discharge pipe 24. The third butter discharge pipe 24 is provided with a ninth valve 15.

[0056] Example 6

[0057] like Figure 1 As shown, a butter cleaning device for olefin separation includes a waste alkali tank 12, a heating coil 9 is provided at the bottom of the waste alkali tank 12, an upper end of one side of the waste alkali tank 12 is connected to an alkali washing tower 1 through a pipeline, a first valve 2 and a fourth valve 7 are provided on the pipeline between the alkali washing tower 1 and the waste alkali tank 12, a waste alkali pump 17 is connected to the bottom of the waste alkali tank 12 away from the alkali washing tower 1 through a pipeline, a tenth valve 16 is provided on the pipeline between the waste alkali tank 12 and the waste alkali pump 17, and a first butter discharge pipe 22 is connected to the upper end of the waste alkali tank 12 away from the alkali washing tower 1, and a seventh valve 13 is provided on the first butter discharge pipe 22.

[0058] The heating coil 9 is steam heated, and the two interfaces of the heating coil 9 are respectively fixedly connected with a steam inlet pipe 19 and a liquid outlet pipe 20 . The steam inlet pipe 19 is provided with a fifth valve 8 , and the liquid outlet pipe 20 is provided with a sixth valve 10 .

[0059] An inhibitor pipe 21 is connected between the first valve 2 and the fourth valve 7. An injection pump 4 and a butter inhibitor tank 6 are sequentially arranged on the inhibitor pipe 21. A second valve 3 is arranged between the injection pump 4 and the first valve 2. A third valve 5 is arranged between the injection pump 4 and the butter inhibitor tank 6.

[0060] An eleventh valve 18 is further provided on the pipeline of the waste alkali pump 17 away from the tenth valve 16 .

[0061] A second butter discharge pipe 23 is externally connected to the lower end of the waste alkali tank 12 on the side away from the alkali washing tower 1 , and an eighth valve 14 is provided on the second butter discharge pipe 23 .

[0062] The eighth valve 14 is connected in parallel with the seventh valve 13. The first butter discharge pipe 22 and the second butter discharge pipe 23 are connected to a third butter discharge pipe 24. The third butter discharge pipe 24 is provided with a ninth valve 15.

[0063] A thermometer 11 is installed at the lower middle part of the side of the waste alkali tank 12.

Claims

1. A butter cleaning device for olefin separation, characterized in that: The invention comprises a waste alkali tank (12), wherein a heating coil (9) is provided at the bottom of the waste alkali tank (12), an upper end of one side of the waste alkali tank (12) is connected to an alkali washing tower (1) through a pipeline, a first valve (2) and a fourth valve (7) are provided on the pipeline between the alkali washing tower (1) and the waste alkali tank (12), a bottom of the side of the waste alkali tank (12) away from the alkali washing tower (1) is connected to a waste alkali pump (17) through a pipeline, a tenth valve (16) is provided on the pipeline between the waste alkali tank (12) and the waste alkali pump (17), and an upper end of the side of the waste alkali tank (12) away from the alkali washing tower (1) is connected to a first butter discharge pipe (22), and a seventh valve (13) is provided on the first butter discharge pipe (22).

2. The butter cleaning device for olefin separation according to claim 1, characterized in that: The heating coil (9) is steam-heated, and two interfaces of the heating coil (9) are respectively fixedly connected to a steam inlet pipe (19) and a liquid outlet pipe (20), the steam inlet pipe (19) is provided with a fifth valve (8), and the liquid outlet pipe (20) is provided with a sixth valve (10).

3. The butter cleaning device for olefin separation according to claim 1, characterized in that: An inhibitor pipe (21) is connected between the first valve (2) and the fourth valve (7), an injection pump (4) and a butter inhibitor tank (6) are sequentially arranged on the inhibitor pipe (21), a second valve (3) is arranged between the injection pump (4) and the first valve (2), and a third valve (5) is arranged between the injection pump (4) and the butter inhibitor tank (6).

4. The butter cleaning device for olefin separation according to claim 1, characterized in that: An eleventh valve (18) is also provided on the pipeline of the waste alkali pump (17) on the side away from the tenth valve (16).

5. The butter cleaning device for olefin separation according to claim 1, characterized in that: A second butter discharge pipe (23) is externally connected to the lower end of the waste alkali tank (12) on the side away from the alkali washing tower (1), and an eighth valve (14) is provided on the second butter discharge pipe (23).

6. The butter cleaning device for olefin separation according to claim 5, characterized in that: The eighth valve (14) and the seventh valve (13) are arranged in parallel.

7. The butter cleaning device for olefin separation according to claim 6, characterized in that: The first butter discharge pipe (22) and the second butter discharge pipe (23) are commonly connected to a third butter discharge pipe (24).

8. The butter cleaning device for olefin separation according to claim 7, characterized in that: The third butter discharge pipe (24) is provided with a ninth valve (15).

9. The butter cleaning device for olefin separation according to claim 1, characterized in that: A temperature gauge (11) is installed at the middle and lower part of the side of the waste alkali tank (12).

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