Integrated inclined pipe precipitator for water treatment of seawater pressure test of large low-temperature storage tank

Abstract

The utility model provides a large -scale low temperature storage tank seawater pressure test water treatment is with integrated seawater inclined tube precipitator, including the casing, the inside of one end of casing is provided with first stirring chamber and second stirring chamber side by side, be provided with grating between first stirring chamber and second stirring chamber, be provided with the precipitation area on the casing, and the upper portion of second stirring chamber is provided with the overflow port of inflow precipitation area, the inside array of precipitation area is provided with a plurality of inclined pipes, and the cross section profile of inclined pipe is regular hexagon, the edge of precipitation area is provided with overflow board encloses and blocks, the other end fixed connection of casing has the drain groove. The utility model discloses first stirring chamber and second stirring chamber of side by side arrangement are favorable to reduce the space of reagent mixing, in addition gas pressure sending mode, ensure that the whole device is unobstructed.

Description

Technical Field

[0001] This utility model relates to the field of sedimentation technology, and in particular to an integrated seawater inclined tube sedimentation device for seawater pressure testing and treatment in large cryogenic storage tanks. Background Technology

[0002] In the construction of cryogenic storage tank projects, hydrostatic testing is a crucial step in verifying the tightness of the inner tank welds, the stability of the foundation, and the structural integrity. Generally, fresh water is used as the test medium for hydrostatic testing of storage tanks. However, in a 220,000 cubic meter storage tank project in Zhoushan, a single tank test requires the injection of up to 140,000 cubic meters of water. Fresh water supply in coastal and island areas is limited and relies on external transportation. Furthermore, local water users are concentrated, and large-scale fresh water extraction would severely impact the regional water balance.

[0003] In contrast, while seawater resources are abundant, direct use has significant drawbacks: the silt, suspended solids, colloids, and chloride ions it contains can easily cause corrosion inside the tank, impurity deposition, and drainage blockage, affecting the accuracy of the experiment and long-term safety. Therefore, if seawater is used as the test medium, it must be effectively purified. In water treatment processes, traditional horizontal sedimentation processes are difficult to meet the water requirements for large storage tank tests due to low efficiency, weak shock resistance, large sludge production, and high costs. Therefore, this project, based on sacrificial anode cathodic protection, introduces the integrated seawater inclined tube settler proposed in this invention. Through efficient sedimentation and purification, the content of suspended solids and colloids is significantly reduced, achieving the safety, economy, and feasibility of using seawater as the test medium while ensuring the quality and progress of the experiment. Utility Model Content

[0004] To address the aforementioned problems, this utility model discloses an integrated seawater inclined tube sedimentation tank for seawater pressure testing and treatment in large cryogenic storage tanks. The tank includes a shell, with a first stirring chamber and a second stirring chamber arranged side-by-side inside one end of the shell. A grid plate is installed between the first and second stirring chambers. The water to be treated is fed into the first and second stirring chambers and then stirred.

[0005] The shell is provided with a sedimentation zone, and the upper part of the second stirring chamber has an overflow port for flowing into the sedimentation zone. Several inclined tubes are arranged in an array inside the sedimentation zone, and the cross-sectional profile of the inclined tubes is a regular hexagon. An overflow plate is provided to surround the edge of the sedimentation zone. A drainage trough is fixedly connected to the other end of the shell. The inclined tubes are inclined at 60° towards the water flow direction. Stirred water enters the sedimentation zone through the overflow port, and the resulting sediment sinks down along the inclined tubes, while clear water passes over the overflow plate and enters the drainage trough through a pre-set through-hole on the shell.

[0006] Preferably, both the first and second stirring chambers are equipped with stirring rods, and a drive motor is fixedly connected to the upper end of the shell. The output end of the drive motor is fixedly connected to the stirring rod. When the drive motor is started, the stirring rod rotates, agitating the water being treated.

[0007] Preferably, a water inlet pipe and a second dosing pipe are fixedly connected to one side of the shell, and the water inlet pipe and the second dosing pipe are located on one side of the first stirring chamber. A first dosing pipe is fixedly connected to the other side of the shell, and the first dosing pipe is located on one side of the second stirring chamber. Both the first and second dosing pipes extend horizontally into the interior of the shell, and through holes are provided on their lower sidewalls. Stirring ensures thorough mixing of the medicine and water, and the structure of the first and second dosing pipes increases the dosage range and facilitates the dispersion of the medicine.

[0008] Preferably, a plurality of sewage branch pipes are fixedly connected to the bottom of the housing, a main sewage discharge pipe is provided on one side of the housing, and the other end of the sewage branch pipes is fixedly connected to the side wall of the main sewage discharge pipe. A gas tank is provided inside the housing, and the output end of the gas tank is fixedly connected to the end of the main sewage discharge pipe. During the sedimentation and transportation process, the gas in the gas tank enters the main sewage discharge pipe, and the sludge is quickly discharged by means of the gas pushing or the Bernoulli principle, avoiding blockage.

[0009] Preferably, a plurality of support legs are fixedly connected to the lower end of the housing. The support legs are used to support and fix the housing.

[0010] Preferably, both the upper and lower parts of the inclined tube are provided with fixing frames. The fixing frames are used to support and fix the inclined tube.

[0011] The beneficial effects of this utility model are as follows: 1. A first mixing chamber and a second mixing chamber are set up side by side, with a grid plate between them. The grid plate ensures that water is treated in the first mixing chamber before entering the second mixing chamber and avoids backflow to the first mixing chamber as much as possible. In addition, the side-by-side arrangement saves space and provides a sufficiently large area for sedimentation.

[0012] 2. The inclined tube array is set up, which greatly reduces the mutual disturbance / convection between the upper and lower water layers in the sedimentation zone, which is conducive to stable sedimentation.

[0013] 3. An air storage tank is provided, which can introduce gas into the main sewage pipe. Through gas pressure or the suction force of the main sewage pipe on the branch sewage pipe generated by Bernoulli's principle, the efficiency of sedimentation and transportation is improved, ensuring the smooth discharge of sludge from the entire device. Attached Figure Description

[0014] Figure 1 This is a three-dimensional schematic diagram of the present invention; Figure 2This is a three-dimensional schematic diagram of the non-inclined tube of this utility model; Figure 3 This is a schematic diagram of one end of the present invention; Figure 4 This is a schematic diagram of the internal structure of one end of the present invention; Figure 5 This is a cross-sectional view of one end of the present invention; Figure 6 for Figure 1 Enlarged view of point A in the middle.

[0015] List of reference numerals in the attached diagram: 1. Shell; 2. Overflow port; 3. Drive motor; 4. Main drain pipe; 5. Branch drain pipe; 6. Overflow plate; 7. Drainage trough; 8. Support leg; 9. Inlet pipe; 10. First mixing chamber; 11. Gas tank; 12. Grating plate; 13. Second mixing chamber; 14. Mixing rod; 15. First dosing pipe; 16. Second dosing pipe; 17. Inclined pipe; 18. Fixing frame. Detailed Implementation

[0016] The present invention will be further explained below with reference to the accompanying drawings and specific embodiments. It should be understood that the following specific embodiments are only for illustrating the present invention and are not intended to limit the scope of the present invention. It should be noted that the terms "front," "rear," "left," "right," "up," and "down" used in the following description refer to the directions in the accompanying drawings, and the terms "inner" and "outer" refer to the directions toward or away from the geometric center of a specific component, respectively.

[0017] like Figures 1 to 6 As shown, an integrated seawater inclined tube settler for seawater pressure testing and treatment in a large cryogenic storage tank includes a shell 1. The shell 1 has an overall rectangular structure. A first stirring chamber 10 and a second stirring chamber 13 are arranged side-by-side inside one end of the shell 1. A grating plate 12 is provided between the first stirring chamber 10 and the second stirring chamber 13. The grating plate 12 is designed to be closed at the top and bottom with a strip-shaped slit in the middle, allowing communication between the first stirring chamber 10 and the second stirring chamber 13.

[0018] The shell 1 is provided with a sedimentation zone, and the upper part of the second stirring chamber 13 is provided with an overflow port 2 for flowing into the sedimentation zone. That is, the water for stirring enters the sedimentation zone through the overflow port 2. Several inclined tubes 17 are arranged in an array inside the sedimentation zone, and the cross-sectional profile of the inclined tubes 17 is a regular hexagon. The regular hexagonal structure ensures that there are no gaps between the inclined tubes 17. An overflow plate 6 is provided to surround the edge of the sedimentation zone. During the sedimentation process, the sediment falls into the inclined tubes 17 and sinks to the bottom of the shell 1, while the clean water passes over the overflow plate 6. A drainage trough 7 is fixedly connected to the other end of the shell 1. The clean water eventually enters the drainage trough 7 and is sent away for use. The inclined tubes 17 are inclined at 60° towards the water flow direction. The inclined tubes 17 and the inclination make the upper and lower water layers in the sedimentation zone less disturbed and ensure that the sediment sinks as undisturbed as possible.

[0019] Both the first mixing chamber 10 and the second mixing chamber 13 are equipped with a stirring rod 14. The stirring rod 14 includes a rotating rod and several plates fixedly connected to the side wall. The upper end of the housing 1 is fixedly connected to a drive motor 3. The output end of the drive motor 3 is fixedly connected to the stirring rod 14. When the drive motor 3 is started, the stirring rod 14 rotates.

[0020] A water inlet pipe 9 and a second dosing pipe 16 are fixedly connected to one side of the shell 1. The water inlet pipe 9 supplies water into the shell 1, and the water inlet pipe 9 and the second dosing pipe 16 are located on one side of the first mixing chamber 10. That is, the water is first sent into the first mixing chamber 10, and then passes through the middle grid plate 12 into the second mixing chamber 13. A first dosing pipe 15 is fixedly connected to the other side of the shell 1, and the first dosing pipe 15 is located on one side of the second mixing chamber 13. The first dosing pipe 15 and the second dosing pipe 16 extend horizontally into the interior of the shell 1, and through holes are opened on the lower side walls to increase the range and uniformity of dosing, which is conducive to thorough mixing in a short time.

[0021] The structural arrangement of the first mixing chamber 10, the grating plate 12, and the second mixing chamber 13 serves two purposes: 1. When water begins to enter the first mixing chamber 10, it will not be immediately discharged into the second mixing chamber 13. Instead, it will reach the discharge level only after a certain period of mixing and reaction. 2. As the water intake rate increases, the water level in the first mixing chamber 10 will continuously rise until it reaches an equilibrium value. The water level at the equilibrium value will be close to the top of the grating plate 12. At this point, the function of closing the upper end of the grating plate 12 is to prevent the water flowing into the first mixing chamber 10 from flowing directly into the second mixing chamber 13 from above. Instead, it must enter the second mixing chamber 13 through the strip-shaped slit in the middle. This effectively prevents seawater from flowing into the second mixing chamber 13 before it has been effectively mixed and reacted in the first mixing chamber 10, thereby ensuring the quality of the preliminary treatment of seawater in the first mixing chamber 10.

[0022] Several sewage branch pipes 5 are fixedly connected to the bottom of the shell 1. Several star-shaped structures are provided at the bottom of the shell 1 to facilitate sedimentation and accumulation into the sewage branch pipes 5. A sewage main pipe 4 is provided on one side of the shell 1, and the other end of the sewage branch pipe 5 is fixedly connected to the side wall of the sewage main pipe 4. A gas tank 11 is provided inside the shell 1. The output end of the gas tank 11 is fixedly connected to the end of the sewage main pipe 4. The gas sent out by the gas tank 11 enters the sewage main pipe 4. Through pressure conveying or the suction force of the sewage main pipe 4 on the sewage branch pipes 5 generated by Bernoulli's principle, the efficiency of sedimentation and transportation is improved, or blockage is avoided.

[0023] Furthermore, to ensure the normal operation of the device, additional external equipment is required, such as air compressors and reagent supply equipment. Several support legs 8 are fixedly connected to the lower end of the housing 1. The support legs 8 are used to support and fix the housing 1. Both the upper and lower parts of the inclined tube 17 are equipped with fixing frames 18. The fixing frames 18 support and constrain the inclined tube 17.

[0024] The technical means disclosed in this utility model are not limited to the technical means disclosed in the above embodiments, but also include technical solutions composed of any combination of the above technical features.

Claims

1. An integrated inclined-tube settler for water treatment of seawater pressure test of a large-sized cryogenic storage tank, characterized by, Includes a shell (1), and a first stirring chamber (10) and a second stirring chamber (13) are arranged side by side inside one end of the shell (1), and a grid plate (12) is arranged between the first stirring chamber (10) and the second stirring chamber (13). The shell (1) is provided with a sedimentation zone, and the upper part of the second stirring chamber (13) is provided with an overflow port (2) for flowing into the sedimentation zone. The sedimentation zone is provided with a plurality of inclined tubes (17) arranged in an array, and the cross-sectional profile of the inclined tubes (17) is a regular hexagon. The edge of the sedimentation zone is provided with an overflow plate (6). The other end of the shell (1) is fixedly connected to a drainage trough (7). The inclined tubes (17) are inclined at 60° toward the direction of water flow.

2. The integrated inclined-tube sedimentation device for water treatment of seawater pressure test of large-sized cryogenic storage tank according to claim 1, characterized in that: The first stirring chamber (10) and the second stirring chamber (13) are both equipped with stirring rods (14). The upper end of the shell (1) is fixedly connected to a drive motor (3), and the output end of the drive motor (3) is fixedly connected to the stirring rod (14).

3. The integrated inclined-tube sedimentation device for water treatment of seawater pressure test of large-sized cryogenic storage tank according to claim 1, characterized in that: A water inlet pipe (9) and a second medicine dispensing pipe (16) are fixedly connected to one side of the housing (1), and the water inlet pipe (9) and the second medicine dispensing pipe (16) are located on one side of the first stirring chamber (10). A first medicine dispensing pipe (15) is fixedly connected to the other side of the housing (1), and the first medicine dispensing pipe (15) is located on one side of the second stirring chamber (13). The first medicine dispensing pipe (15) and the second medicine dispensing pipe (16) extend horizontally into the interior of the housing (1), and through holes are provided on the lower sidewalls.

4. The integrated seawater inclined tube settler for seawater pressure testing and water treatment in large cryogenic storage tanks according to claim 1, characterized in that: The bottom of the housing (1) is fixedly connected with several sewage branch pipes (5), a sewage main pipe (4) is provided on one side of the housing (1), and the other end of the sewage branch pipe (5) is fixedly connected to the side wall of the sewage main pipe (4). A gas tank (11) is provided inside the housing (1), and the output end of the gas tank (11) is fixedly connected to the end of the sewage main pipe (4).

5. The integrated inclined-tube sedimentation device for water treatment of seawater pressure test of large-sized cryogenic storage tank according to claim 1, characterized in that: The lower end of the housing (1) is fixedly connected with several support legs (8).

6. The integrated inclined-tube sedimentation device for water treatment of seawater pressure testing of a large cryogenic storage tank according to claim 1, characterized in that: The inclined tube (17) is provided with a fixing frame (18) at both the upper and lower parts.

Images