A separation tank ammonia water backwashing device

Abstract

The utility model relates to a kind of ammonia water backflushing devices of separation tank, including separation tank, the surface of separation tank is fixedly installed with overhauling manhole end cover, first connecting pipe and second connecting pipe are fixedly installed with penetrating separation tank, the end of first connecting pipe is fixedly connected with underflow main pump, the end of second connecting pipe is fixedly connected with underflow auxiliary pump, the top of first connecting pipe and second connecting pipe is interconnected, the top of first connecting pipe and second connecting pipe is connected with third connecting pipe, first stop valve is fixedly installed on third connecting pipe;Second stop valve is fixedly installed on second connecting pipe;The side wall of second connecting pipe is fixedly connected with fourth communicating pipe, the end of fourth communicating pipe is fixedly connected with backflushing pipeline.The utility model has beneficial effects: structure design is reasonable, novel, easy to process, and the cost of processing and manufacturing is low, convenient to operate, safe and reliable, save manpower and material resources, effectively solve the problem of large amount of tar sludge deposited in separation tank bottom for a long time.

Description

Technical Field

[0001] This utility model relates to the technical field of auxiliary equipment for tar ammonia water separation process, specifically to an ammonia water backwashing device for a separation tank. Background Technology

[0002] One new tar-ammonia water separation tank has been added to the existing purification and recovery cold drum area. This tank will temporarily store the liquid tar-ammonia water mixture separated by the two newly added two-phase centrifuges. The mixture will be transported to an intermediate tar-ammonia water tank via two submersible pumps equipped with the tank for oil-water separation. After the oil and water are separated, the light and heavy tar will be transferred to the raw material tank area for later use. The tar-ammonia water separation tank stores the tar-ammonia water mixture, with a volume of approximately 16 m³, a design temperature of 100 ℃, a design pressure of 0.002 MPa, a medium density of approximately 990 kg / m³, a tank diameter of 1800 mm, and a tangential length of 6500 mm. The tank is equipped with two submersible pumps. By adding a backwashing pipeline, the tar sludge deposited at the bottom of the separation tank can be backwashed, thus removing the tar sludge and preventing tar and ammonia water stratification in the dilution tank. During the trial production of the equipment, it was discovered that after a period of operation, the submersible pump outlet pressure in the separation tank was low, resulting in insufficient pump output. Random maintenance and repairs were conducted on the separation tank and submersible pump during a production line shutdown. The specific situation was found to be: the liquid tar and ammonia mixture separated by the two newly added two-phase centrifuges in the purification cooling drum area was temporarily stored in the separation tank. This was because the ammonia medium density was approximately 0.91 g / cm³. 3 The density of tar medium is approximately 1.25 g / cm³. 3 Due to the physical property that tar is lighter than ammonia, a large amount of tar sludge will accumulate at the bottom of the separation tank over time. During the disassembly of the submersible pump, damage was also found to be caused by the wear of the pump body impeller blades by solids such as tar sludge, which affected the normal use of the submersible pump.

[0003] Because manual cleaning of tar sludge at the bottom of the separation tank requires production personnel to obtain permits for confined space operations and other hazardous work procedures, and to prevent the risk of poisoning and suffocation, cleaning personnel are required to wear air respirators and full disposable protective suits, which increases labor intensity and reduces work efficiency. To address impeller damage to the submersible pump and to reduce labor intensity while improving work efficiency, technical improvements are needed to address the tar sludge buildup at the bottom of the separation tank.

[0004] To overcome the above shortcomings, the general solution is to clean manually during regular production line shutdowns. This method is not only time-consuming and inefficient, but also dangerous, wasting manpower and resources, and failing to address the root cause of the problem. Utility Model Content

[0005] The purpose of this utility model is to provide a separation tank ammonia backwashing device with a reasonable structural design, novel concept, easy processing, low processing and manufacturing cost, convenient operation, safety and reliability, saving manpower and material resources. It effectively solves the problem that a large amount of tar sludge that has been deposited at the bottom of the separation tank in the cold drum area of ​​the purification and recycling production line enters the submerged pump body of the separation tank, damaging the impeller and shortening the service life of the pump body. At the same time, it effectively avoids the workload of production personnel frequently stopping the machine to clean the tar sludge deposited at the bottom of the separation tank, which not only improves work efficiency, but also avoids the safety risks of poisoning and suffocation involved in the sludge cleaning operation.

[0006] This utility model discloses an ammonia backwashing device for a water separation tank, comprising a water separation tank, a maintenance manhole end cap fixedly installed on the surface of the water separation tank, a first connecting pipe and a second connecting pipe fixedly installed through the water separation tank, a submersible main pump fixedly connected to the end of the first connecting pipe, a submersible auxiliary pump fixedly connected to the end of the second connecting pipe, the top ends of the first connecting pipe and the second connecting pipe being interconnected, a third connecting pipe being connected to the top ends of the first connecting pipe and the second connecting pipe, a first shut-off valve fixedly installed on the third connecting pipe, a second shut-off valve fixedly installed on the second connecting pipe, a fourth connecting pipe fixedly connected to the side wall of the second connecting pipe, and a backwashing pipe fixedly connected to the end of the fourth connecting pipe.

[0007] The backwash pipe is located inside the separation tank. The bottom surface of the backwash pipe is divided into two branch pipes with an included angle of 10°-30° between the two branch pipes.

[0008] The backwashing pipe is located inside the separation tank. The bottom of the backwashing pipe branches into two branches. After the second shut-off valve is closed, the submersible main pump is activated to draw ammonia water into the backwashing pipe, changing the flow direction of the ammonia water. This backwashes the tar sludge deposited at the bottom of the separation tank, causing the tar sludge to mix and dilute with the upper ammonia water, forming a tar-ammonia mixture. This effectively removes the tar sludge deposited at the bottom of the separation tank and dilutes the tar-ammonia mixture within the tank. The backwashing effect is excellent, effectively solving the problem of large amounts of tar sludge deposited at the bottom of the separation tank in the cold drum area of ​​the purification and recovery production line damaging the impeller of the submersible pump and shortening its service life. Simultaneously, it effectively avoids the workload of frequent shutdowns for cleaning the tar sludge deposited at the bottom of the separation tank, improving work efficiency and mitigating the safety risks of poisoning and suffocation associated with cleaning operations.

[0009] A check valve and a backwash pipe shut-off valve are fixedly installed on the fourth connecting pipe.

[0010] A check valve is installed to prevent backflow of ammonia. At the same time, a backwash pipeline shut-off valve is installed as a double safety measure to prevent leakage or failure of the check valve, thereby improving the safe operation of the entire backwashing device and extending its service life.

[0011] A backwashing pipeline maintenance connection flange is fixedly installed on the fourth connecting pipe.

[0012] The included backwash pipe maintenance connection flange is used for the inspection and maintenance of the backwash pipe, making the inspection and maintenance operation more convenient. It eliminates the need to disassemble the entire backwash device for inspection and maintenance, saving operators' inspection time and effort.

[0013] The fourth connecting pipe is connected to a venting and purging pipe, and a venting and purging pipe shut-off valve is fixedly installed on the venting and purging pipe.

[0014] The venting and purging pipeline is designed to release and purge the backwashing pipeline after the venting and purging pipeline shut-off valve is opened. This allows the gas or liquid inside the backwashing pipeline to be discharged, achieving purposes such as cleaning the backwashing pipeline, detecting leaks, or adjusting pressure. During the backwashing process, venting helps to remove the accumulation of gas in the pipeline and prevent abnormal pressure inside the pipeline caused by gas retention, thereby ensuring the smooth progress of the backwashing process.

[0015] The beneficial effects of this utility model are: 1) The backwashing pipe is located inside the separation tank. The bottom of the backwashing pipe is divided into two branch pipes. After the second shut-off valve is closed, the submersible main pump is turned on to draw ammonia water into the backwashing pipe, changing the flow direction of the ammonia water. This backwashes the tar sludge deposited at the bottom of the separation tank, causing the tar sludge deposited at the bottom of the separation tank to mix and dilute with the upper layer of ammonia water to form a tar-ammonia water mixture. This effectively removes the tar sludge deposited at the bottom of the separation tank and dilutes the tar-ammonia water mixture in the separation tank. The backwashing effect is good, effectively solving the problem of a large amount of tar sludge that has been deposited at the bottom of the separation tank in the cold drum area of ​​the purification and recycling production line entering the separation tank and damaging the impeller of the submersible pump body, thus shortening the service life of the pump body. At the same time, it effectively avoids the workload of frequent shutdowns by production personnel to clean the tar sludge deposited at the bottom of the separation tank, which not only improves work efficiency but also avoids the safety risks of poisoning and suffocation involved in the sludge cleaning operation.

[0016] 2) A check valve is installed to prevent backflow of ammonia. At the same time, a backwash pipeline shut-off valve is installed as a double safety measure to prevent leakage or failure of the check valve, thereby improving the safe operation of the entire backwashing device and extending its service life.

[0017] 3) The backwash pipe maintenance connection flange is set up for the inspection and maintenance of the backwash pipe, making the inspection and maintenance operation more convenient. It eliminates the need to disassemble the entire backwash device for inspection and maintenance, saving the operator's inspection time and effort.

[0018] 4) The venting and purging pipeline is designed to release and purge the backwashing pipeline after the venting and purging pipeline shut-off valve is opened. This allows the gas or liquid in the backwashing pipeline to be discharged, achieving purposes such as cleaning the backwashing pipeline, detecting leaks, or adjusting pressure. During the backwashing process, venting helps to remove the accumulation of gas in the pipeline and prevent abnormal pressure in the pipeline caused by gas retention, thereby ensuring the smooth progress of the backwashing process.

[0019] 5) The device has a reasonable structural design, novel concept, is easy to process, has low processing and manufacturing costs, is convenient to operate, safe and reliable, saves manpower and material resources, has a good backwashing effect, ensures the safe operation of the separation tank, reduces the workload of operators, and ensures the safety of operators. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of this utility model.

[0021] In the diagram: 1. Separation tank; 2. Manhole cover; 3. Tar sludge; 4. Ammonia water; 5. Submersible main pump; 6. Submersible auxiliary pump; 7. First shut-off valve; 7. Third connecting pipe 701; 702. First connecting pipe; 703. Second connecting pipe; 8. Second shut-off valve; 9. Check valve; 10. Shut-off valve of backwash pipeline; 11. Backwash pipeline maintenance connection flange; 12. Shut-off valve of venting and purging pipeline; 12. Venting and purging pipeline 1201; 13. Backwash pipeline. Detailed Implementation

[0022] Example 1 The present invention will be further described below with reference to the accompanying drawings.

[0023] This utility model includes a separation tank 1, a maintenance manhole end cap 2, tar sludge 3, ammonia water 4, a submersible main pump 5, a submersible auxiliary pump 6, a first shut-off valve 7, a third connecting pipe 701, a first connecting pipe 702, a second connecting pipe 703, a second shut-off valve 8, a check valve 9, a backwash pipe maintenance connection flange 10, a venting and purging pipe shut-off valve 12, a venting and purging pipe 1201, and a backwash pipe 13. Specifically, the structure includes a separation tank 1, with a maintenance manhole end cap 2 fixedly installed on its surface, and a first connecting pipe 702 and a second connecting pipe fixedly installed through the separation tank 1. 703, a submersible main pump 5 is fixedly connected to the end of the first connecting pipe 702, a submersible auxiliary pump 6 is fixedly connected to the end of the second connecting pipe 703, the top ends of the first connecting pipe 702 and the second connecting pipe 703 are interconnected, a third connecting pipe 701 is connected to the top ends of the first connecting pipe 702 and the second connecting pipe 703, a first shut-off valve 7 is fixedly installed on the third connecting pipe 701, a second shut-off valve 8 is fixedly installed on the second connecting pipe 703, a fourth connecting pipe 901 is fixedly connected to the side wall of the second connecting pipe 703, and a backwash pipe 13 is fixedly connected to the end of the fourth connecting pipe 901.

[0024] The backwash pipe 13 is located inside the separation tank 1. The bottom surface of the backwash pipe 13 is divided into two branch pipes, and the included angle between the two branch pipes is 10°-30°.

[0025] A check valve 9 and a backwash pipe shut-off valve 10 are fixedly installed on the fourth connecting pipe 901.

[0026] The fourth connecting pipe 901 is connected to a venting and purging pipe 1201, and a venting and purging pipe shut-off valve 12 is fixedly installed on the venting and purging pipe 1201.

[0027] Instructions for use: A submersible main pump 5 and a submersible auxiliary pump 6 are installed in the separation tank 1. A fourth connecting pipe 901 is fixedly connected to the side wall of the second connecting pipe 703. A backwash pipe 13 is fixedly connected to the end of the fourth connecting pipe 901. The backwash pipe 13 is located inside the separation tank 1. The bottom of the backwash pipe 13 is divided into two branch pipes. After the second shut-off valve 8 is closed, the submersible main pump 5 is turned on to draw in ammonia water 4 into the backwash pipe 13, changing the flow direction of the ammonia water 4. This backwashes the tar sludge 3 deposited at the bottom of the separation tank 1, causing the tar sludge 3 deposited at the bottom of the separation tank 1 to mix and dilute with the upper ammonia water 4 to form a tar-ammonia water mixture, thus achieving effective removal and separation. The purpose of the tar sludge 3 deposited at the bottom of the water tank 1 and the dilution and separation of the tar ammonia water medium in the water tank 1 is to release and purge the backwash pipe 13 after the release and purge pipe shut-off valve 12 is opened, so as to discharge the gas or liquid in the backwash pipe 13, thereby achieving the purpose of cleaning the backwash pipe 13, detecting leaks or adjusting pressure, etc. After the backwash process is completed, the shut-off valve 10 of the backwash pipeline is closed, the release and purge pipe shut-off valve 12 is closed, and the shut-off valve 8 on the second connecting pipe 703 of the outlet of the submersible pump main pump 5 and the submersible auxiliary pump 6 is opened, so as to use the submersible main pump 5 or the submersible auxiliary pump 6 to carry out the normal transportation of the tar ammonia water mixture medium.

[0028] Example 2 This utility model includes a separation tank 1, a maintenance manhole end cap 2, tar sludge 3, ammonia water 4, a submersible main pump 5, a submersible auxiliary pump 6, a first shut-off valve 7, a third connecting pipe 701, a first connecting pipe 702, a second connecting pipe 703, a second shut-off valve 8, a check valve 9, a backwash pipe maintenance connection flange 10, a backwash pipe maintenance connection flange 11, a venting and purging pipe shut-off valve 12, a venting and purging pipe 1201, and a backwash pipe 13. The specific structure includes a separation tank 1, with a maintenance manhole end cap 2 fixedly installed on the surface of the separation tank 1, and a first connecting pipe 701 fixedly installed through the separation tank 1. 2. A submersible main pump 5 is fixedly connected to the end of the first connecting pipe 702, and a submersible auxiliary pump 6 is fixedly connected to the end of the second connecting pipe 703. The top ends of the first connecting pipe 702 and the second connecting pipe 703 are interconnected. A third connecting pipe 701 is connected to the top ends of the first connecting pipe 702 and the second connecting pipe 703. A first shut-off valve 7 is fixedly installed on the third connecting pipe 701. A second shut-off valve 8 is fixedly installed on the second connecting pipe 703. A fourth connecting pipe 901 is fixedly connected to the side wall of the second connecting pipe 703. A backwash pipe 13 is fixedly connected to the end of the fourth connecting pipe 901.

[0029] The backwash pipe 13 is located inside the separation tank 1. The bottom surface of the backwash pipe 13 is divided into two branch pipes, and the included angle between the two branch pipes is 10°-30°.

[0030] A check valve 9 and a backwash pipe shut-off valve 10 are fixedly installed on the fourth connecting pipe 901.

[0031] A backwashing pipe maintenance connection flange 11 is fixedly installed on the fourth connecting pipe 901.

[0032] The fourth connecting pipe 901 is connected to a venting and purging pipe 1201, and a venting and purging pipe shut-off valve 12 is fixedly installed on the venting and purging pipe 1201.

[0033] Instructions for use: A submersible main pump 5 and a submersible auxiliary pump 6 are installed in the separation tank 1. A fourth connecting pipe 901 is fixedly connected to the side wall of the second connecting pipe 703. A backwash pipe 13 is fixedly connected to the end of the fourth connecting pipe 901. The backwash pipe 13 is located inside the separation tank 1. The bottom of the backwash pipe 13 is divided into two branch pipes. After the second shut-off valve 8 is closed, the submersible main pump 5 is turned on to draw in ammonia water 4 into the backwash pipe 13, changing the flow direction of the ammonia water 4. This backwashes the tar sludge 3 deposited at the bottom of the separation tank 1, causing the tar sludge 3 deposited at the bottom of the separation tank 1 to mix and dilute with the upper ammonia water 4 to form a tar-ammonia water mixture, thus achieving effective removal and separation. The purpose of the tar sludge 3 deposited at the bottom of the water tank 1 and the dilution and separation of the tar ammonia water medium in the water tank 1 is to release and purge the backwash pipe 13 after the release and purge pipe shut-off valve 12 is opened, so as to discharge the gas or liquid in the backwash pipe 13, thereby achieving the purpose of cleaning the backwash pipe 13, detecting leaks or adjusting pressure, etc. After the backwash process is completed, the shut-off valve 10 of the backwash pipeline is closed, the release and purge pipe shut-off valve 12 is closed, and the shut-off valve 8 on the second connecting pipe 703 of the outlet of the submersible pump main pump 5 and the submersible auxiliary pump 6 is opened, so as to use the submersible main pump 5 or the submersible auxiliary pump 6 to carry out the normal transportation of the tar ammonia water mixture medium.

[0034] The backwash pipe maintenance connection flange 11 is set up for the inspection and maintenance of the backwash pipe 13, making the inspection and maintenance operation more convenient. It eliminates the need to disassemble the entire backwash device for inspection and maintenance, saving the operator's inspection time and effort.

Claims

1. A backwashing device for ammonia in a separation tank, characterized in that: The system includes a separation tank (1), a maintenance manhole end cap (2) fixedly installed on the surface of the separation tank (1), a first connecting pipe (702) and a second connecting pipe (703) fixedly installed through the separation tank (1), a submersible main pump (5) fixedly connected to the end of the first connecting pipe (702), a submersible auxiliary pump (6) fixedly connected to the end of the second connecting pipe (703), the top ends of the first connecting pipe (702) and the second connecting pipe (703) being interconnected, a third connecting pipe (701) being connected to the top ends of the first connecting pipe (702) and the second connecting pipe (703), a first shut-off valve (7) fixedly installed on the third connecting pipe (701); a second shut-off valve (8) fixedly installed on the second connecting pipe (703); a fourth connecting pipe (901) fixedly connected to the side wall of the second connecting pipe (703), and a backwash pipe (13) fixedly connected to the end of the fourth connecting pipe (901).

2. The ammonia backwashing device for a separation tank as described in claim 1, characterized in that: The backwash pipe (13) is located inside the separation tank (1). The bottom surface of the backwash pipe (13) is divided into two branch pipes with an included angle of 10°-30° between the two branch pipes.

3. The ammonia backwashing device for a separation tank as described in claim 2, characterized in that: A check valve (9) and a backwash pipe shut-off valve (10) are fixedly installed on the fourth connecting pipe (901).

4. The ammonia backwashing device for a separation tank as described in claim 3, characterized in that: A backwashing pipe maintenance connection flange (11) is fixedly installed on the fourth connecting pipe (901).

5. The ammonia backwashing device for a separation tank as described in claim 4, characterized in that: The fourth connecting pipe (901) is connected to a venting and purging pipe (1201), and a venting and purging pipe shut-off valve (12) is fixedly installed on the venting and purging pipe (1201).

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