A seamless steel pipe pickling inner circulation device

Abstract

The utility model relates to the field of seamless steel pipe processing equipment, and specifically relates to a kind of pickling internal circulation equipment of seamless steel pipe;The pickling internal circulation equipment of seamless steel pipe includes: pickling tank, sediment tank and purification tank;The pickling internal circulation equipment of seamless steel pipe is sequentially pretreated and purified processing to pickling wastewater discharged inside pickling tank by the cooperation of the sediment tank and purification tank arranged, realizes the internal circulation utilization of pickling liquid.

Description

Technical Field

[0001] This utility model relates to the field of seamless steel pipe processing equipment, specifically a seamless steel pipe pickling internal circulation equipment. Background Technology

[0002] Pickling is an important process in the processing of seamless steel pipes. The main purpose of pickling is to remove iron oxide scale and rust from the surface of the seamless steel pipe. At the same time, through subsequent passivation treatment, a dense oxide film is formed on the surface of the steel pipe, which improves its corrosion resistance. In addition, pickling can also provide a good foundation for subsequent painting, powder coating and other coating processes.

[0003] In related technologies, when pickling seamless steel pipes, the pickling solution is generally injected into the pickling tank, and then the seamless steel pipe to be processed is placed inside the pickling tank for immersion. The pickling solution injected into the pickling tank reacts and comes into full contact with the seamless steel pipe to achieve the pickling operation.

[0004] Pickling solution turns seamless steel pipes into waste liquid after pickling. The waste liquid contains a large amount of acidic components, metal ions and metal slag. If the pickling waste liquid is discharged directly, it will not only pollute the water environment, but also waste acid and metal resources. Therefore, it is necessary to recycle and reuse the pickling solution and implement an internal recycling process to achieve automated production.

[0005] In view of the problems in the background art mentioned above, the present invention aims to provide a seamless steel pipe pickling internal circulation device. Utility Model Content

[0006] The purpose of this invention is to provide a seamless steel pipe pickling internal circulation device to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] A seamless steel pipe pickling internal circulation device, the seamless steel pipe pickling internal circulation device comprising:

[0009] The pickling tank, sedimentation tank, and purification tank are provided. The bottom side of the pickling tank is connected to a wastewater pipe, and one end of the wastewater pipe is connected to the inlet of the wastewater pump. The outlet of the wastewater pump is connected to the bottom side of the sedimentation tank via a wastewater pipe.

[0010] The sedimentation tank is divided into a neutralization chamber and a filtration chamber by a partition.

[0011] The sedimentation tank is connected to a liquid delivery pipe at one end. One end of the liquid delivery pipe is connected to the inlet of the liquid delivery pump, and the outlet of the liquid delivery pump is connected to a water inlet pipe, which is connected to the upper part of the purification tank.

[0012] As a further embodiment of this utility model: a feeding port is provided at the upper end of the neutralization chamber, and the upper end of the neutralization chamber is connected to the upper end of the filter chamber through a filter cavity. The filter cavity is located at the upper end of the partition plate, and a sieve plate is installed inside the filter cavity. At the same time, a filter tube is installed inside the filter chamber. The filter tube is installed obliquely inside the filter chamber, and the upper end of the filter tube is connected to one side of the filter cavity. The lower end of the filter tube, after passing through the inner wall of the filter chamber, is connected to the waste port. In addition, a backflushing port is connected to one side of the bottom of the filter chamber.

[0013] As a further embodiment of this utility model: an exchange chamber is formed inside the purification tank, and an upper ion exchange column and a lower ion exchange column are installed inside the exchange chamber. The upper ion exchange column and the lower ion exchange column are located at the upper and lower ends inside the exchange chamber, respectively, and the upper ion exchange column and the lower ion exchange column are connected by a guide pipe.

[0014] A brine tank is provided on one side of the purification tank. The upper end of the brine tank is connected to a backflushing pipe. A feed pump for draining brine is installed inside the brine tank. The outlet end of the feed pump is connected to the end of the backflushing pipe that extends into the brine tank. A drain pipe and a sewage pipe are also connected to the upper side of the purification tank. One end of the inlet pipe and one end of the sewage pipe extend into the exchange chamber. One end of the backflushing pipe and one end of the drain pipe extend into the upper ion exchange column. Solenoid valves are installed on the inlet pipe, the drain pipe, the backflushing pipe, and the sewage pipe.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] The seamless steel pipe pickling internal circulation equipment, through the combined action of the set sedimentation tank and the purification tank, can sequentially pre-treat and purify the pickling wastewater discharged from the pickling tank.

[0017] For example, by combining the neutralization chamber and the filtration chamber inside the sedimentation tank, pickling waste liquid can be pretreated, including adding alkaline materials to the pickling liquid for pickling neutralization reaction and filtering and purifying the waste liquid after the reaction.

[0018] Inside the purification tank, the pretreated pickling waste liquid can be purified by ion exchange and then transported back to the pickling tank for recycling. Moreover, the purification tank, in conjunction with the matching brine tank, can flush the upper and lower ion exchange columns inside the purification tank, extending the service life of the upper and lower ion exchange columns. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model.

[0020] Figure 1 This is a schematic diagram of the structure of a seamless steel pipe pickling internal circulation device according to an embodiment of the present utility model.

[0021] Figure 2 This is a schematic diagram of the internal structure of the sedimentation tank in a seamless steel pipe pickling internal circulation device according to an embodiment of the present invention.

[0022] Figure 3 This is a schematic diagram of the internal structure of the purification tank of a seamless steel pipe pickling internal circulation device according to an embodiment of the present invention.

[0023] In the diagram: 1-Acid washing tank, 2-Wastewater pipe, 3-Wastewater pump, 4-Sedimentation tank, 5-Feeding port, 6-Sieve plate, 7-Waste outlet, 8-Liquid delivery pipe, 9-Liquid delivery pump, 10-Water inlet pipe, 11-Brine tank, 12-Backflush pipe, 13-Purification tank, 14-Drainage pipe, 15-Sewage pipe, 16-Filter chamber, 17-Filter tube, 18-Neutralization chamber, 19-Partition plate, 20-Filter chamber, 21-Backflush port, 22-Solenoid valve, 23-Upper ion exchange column, 24-Exchange chamber, 25-Guide pipe, 26-Lower ion exchange column. Detailed Implementation

[0024] To make the technical problems, technical solutions, and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0025] Example

[0026] Please see Figure 1 , Figure 2 and Figure 3 This utility model provides a seamless steel pipe pickling internal circulation device, which includes:

[0027] The system includes a pickling tank 1, a sedimentation tank 4, and a purification tank 13. The lower end of the pickling tank 1 is connected to a wastewater pipe 2, one end of which is connected to the inlet of a wastewater pump 3. The outlet of the wastewater pump 3 is connected to the lower end of the sedimentation tank 4 via the wastewater pipe 2. The pickling tank 1 is used to temporarily store the pickling solution discharged during the pickling of seamless steel pipes. The wastewater pipe 2, in conjunction with the wastewater pump 3, allows the pickling solution temporarily stored inside the pickling tank 1 to be transported to the sedimentation tank 4.

[0028] The sedimentation tank 4 is divided into a neutralization chamber 18 and a filtration chamber 20 by a partition 19. The sedimentation tank 4 is used to pre-treat the incoming pickling solution, including adding alkaline materials to the pickling solution for acid neutralization reaction and filtering and purifying the waste liquid after the reaction. Alkaline materials are added to the neutralization chamber 18 to the pickling solution for acid-base neutralization reaction, and the waste liquid after the neutralization reaction is filtered and purified in the filtration chamber 20.

[0029] The lower end of the sedimentation tank 4 is connected to a liquid delivery pipe 8. One end of the liquid delivery pipe 8 is connected to the inlet of the liquid delivery pump 9, and the outlet of the liquid delivery pump 9 is connected to a water inlet pipe 10. The water inlet pipe 10 is connected to the upper part of the purification tank 13. The liquid delivery pipe 8, the liquid delivery pump 9 and the water inlet pipe 10 work together to transport the pretreated waste liquid in the sedimentation tank 4 to the purification tank 13. After being purified by ion exchange in the purification tank 13, it is transported back to the pickling tank for recycling.

[0030] Please see Figure 2 In one embodiment of the present invention, a feeding port 5 is provided at the upper end of the neutralization chamber 18. The feeding port 5 at the upper end of the neutralization chamber 18 is used to feed alkaline materials into the neutralization chamber 18 and react with the pickling solution entering the neutralization chamber 18 to achieve acid-base neutralization reaction, thereby realizing the pretreatment of the acid and alkali solution.

[0031] The upper end of the neutralization chamber 18 is connected to the upper end of the filter chamber 20 through the filter cavity 16. The filter cavity 16 is located above the partition 19, and a sieve plate 6 is installed inside the filter cavity 16. At the same time, a filter tube 17 is installed inside the filter chamber 20. The filter tube 17 is installed at an angle inside the filter chamber 20, and the upper end of the filter tube 17 is connected to one side of the filter cavity 16. The lower end of the filter tube 17 passes through the inner wall of the filter chamber 20 and the end portion is connected to the waste port 7. In addition, a backflushing port 21 is connected to one side of the bottom of the filter chamber 20.

[0032] In this embodiment of the invention, the material after the acid-base neutralization reaction inside the feed port 5 produces flocculated precipitate. As the volume of the acid-base solution increases inside the neutralization chamber 18, the precipitate also rises. The waste liquid after the acid-base neutralization reaction passes through the filter chamber 16 and enters the filter chamber 20. When the waste liquid passes through the filter chamber 16, the screen plate 6 can perform initial filtration and interception of the waste liquid, intercepting the solid impurities contained in the waste liquid. At the same time, after the waste liquid enters the filter chamber 20, it flows inside the filter tube 17. The filter tube 17 can perform secondary filtration and interception of the waste liquid, intercepting the impurities and precipitating them (at this time, the waste port 7 is in a closed state, and the backflushing port 21 is in a closed state).

[0033] After secondary filtration, the waste liquid is discharged through the liquid delivery pipe 8. Later, backwash liquid can be introduced into the filter chamber 20 through the backwash port 21 to backwash the filter tube 17 installed inside the filter chamber 20. The dirt adhering to the inner wall of the filter tube 17 can be smoothly guided and discharged from the waste port 7 through the backwash water along the inner wall of the filter tube 17.

[0034] Please see Figure 3 In one embodiment of the present invention, the purification tank 13 forms an exchange chamber 24 inside, and an upper ion exchange column 23 and a lower ion exchange column 26 are installed inside the exchange chamber 24. The upper ion exchange column 23 and the lower ion exchange column 26 are located at the upper and lower ends inside the exchange chamber 24, respectively, and the upper ion exchange column 23 and the lower ion exchange column 26 are connected by a guide pipe 25.

[0035] Meanwhile, a brine tank 11 is provided on one side of the purification tank 13. The upper end of the brine tank 11 is connected to the backflushing pipe 12. A feed pump for draining brine is installed inside the brine tank 11. The outlet end of the feed pump is connected to the end part of the backflushing pipe 12 that extends into the brine tank 11. A drain pipe 14 and a sewage pipe 15 are also connected to the upper side of the purification tank 13.

[0036] One end of the inlet pipe 10 and one end of the drain pipe 15 extend into the exchange chamber 24. One end of the backflushing pipe 12 and one end of the drain pipe 14 extend into the upper ion exchange column 23. Solenoid valves 22 are installed on the inlet pipe 10, the drain pipe 14, the backflushing pipe 12, and the drain pipe 15.

[0037] In an embodiment of this utility model, when the purification tank 13 is used to perform ion exchange cleaning on the pretreated pickling solution, the pretreated pickling solution is transported to the exchange chamber 24 by the liquid delivery pump 9 and the water inlet pipe 10 working together, while the backflushing pipe 12 and the drain pipe 15 are sealed.

[0038] The pickling solution rises inside the exchange chamber 24, gradually increasing in volume. When it reaches a certain volume, it enters from the bottom of the lower ion exchange column 26 and rises along the inside of the guide tube 25, finally entering the upper ion exchange column 23. Inside the lower ion exchange column 26 and the upper ion exchange column 23, the metal ions and other impurities are removed by the ion exchange resin, and the solution becomes new pickling solution. It is then discharged through the drain pipe 14 and transported to the pickling tank for secondary use.

[0039] When the upper ion exchange column 23 and the lower ion exchange column 26 lose their effectiveness after a period of use, the feed pump installed inside the brine tank 11 can be activated to transport the temporarily stored brine solution inside the brine tank 11 to the upper ion exchange column 23 through the backwash pipe 12. The salt easily flows along the upper ion exchange column 23, the guide pipe 25, and the lower ion exchange column 26 in sequence, backwashing the inner walls of the upper ion exchange column 23, the guide pipe 25, and the lower ion exchange column 26 before entering the exchange chamber 24 and finally becoming wastewater discharged from the drain pipe 15. In this way, the upper ion exchange column 23 and the lower ion exchange column 26 can be reused.

[0040] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0041] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A seamless steel pipe pickling internal circulation device, comprising: The pickling tank (1), sedimentation tank (4), and purification tank (13) are provided. A wastewater pipe (2) is connected to one side of the lower end of the pickling tank (1), and one end of the wastewater pipe (2) is connected to the inlet of a wastewater pump (3). The outlet of the wastewater pump (3) is connected to one side of the lower end of the sedimentation tank (4) via the wastewater pipe (2). The feature is that: The sedimentation tank (4) is divided into a neutralization chamber (18) and a filtration chamber (20) by a partition (19); a liquid delivery pipe (8) is connected to one side of the lower end of the sedimentation tank (4), one end of the liquid delivery pipe (8) is connected to the inlet of the liquid delivery pump (9), and the outlet of the liquid delivery pump (9) is connected to the water inlet pipe (10), which is connected to the upper part of the purification tank (13).

2. The seamless steel pipe pickling internal circulation equipment according to claim 1, characterized in that: The neutralization chamber (18) has a feeding port (5) at the upper end. The upper end of the neutralization chamber (18) is connected to the upper end of the filter chamber (20) through the filter cavity (16). The filter cavity (16) is located at the upper end of the partition (19). A sieve plate (6) is installed inside the filter cavity (16). Meanwhile, a filter tube (17) is installed inside the filter chamber (20). The filter tube (17) is installed at an angle inside the filter chamber (20), and the upper end of the filter tube (17) is connected to one side of the filter cavity (16). The lower end of the filter tube (17) is connected to the waste port (7) after passing through the inner wall of the filter chamber (20). In addition, a backflushing port (21) is connected to one side of the bottom inside the filter chamber (20).

3. The seamless steel pipe pickling internal circulation equipment according to claim 1, characterized in that: The purification tank (13) forms an exchange chamber (24) inside, and an upper ion exchange column (23) and a lower ion exchange column (26) are installed inside the exchange chamber (24). The upper ion exchange column (23) and the lower ion exchange column (26) are located at the upper and lower ends inside the exchange chamber (24) respectively, and the upper ion exchange column (23) and the lower ion exchange column (26) are connected by a guide pipe (25). A brine tank (11) is provided on one side of the purification tank (13). The upper end of the brine tank (11) is connected to the backflushing pipe (12). A feed pump for draining brine is installed inside the brine tank (11). The outlet end of the feed pump is connected to the end part of the backflushing pipe (12) that extends into the brine tank (11). The upper side of the purification tank (13) is also connected to the drain pipe (14) and the sewage pipe (15). One end of the water inlet pipe (10) and one end of the sewage pipe (15) extend into the exchange chamber (24). One end of the backflushing pipe (12) and one end of the drain pipe (14) extend into the upper ion exchange column (23). Solenoid valves (22) are installed on the water inlet pipe (10), the drain pipe (14), the backflushing pipe (12), and the sewage pipe (15).

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