Chemical wastewater recovery hydrochloric acid device

Abstract

The utility model discloses a chemical industry wastewater recovery hydrochloric acid device, the ion resin tower body's tower jar top intercommunication welding has the liquid inlet pipe, still includes the liquid sink mechanism, the liquid sink mechanism includes flange connector, double -bend connecting pipe, flange connects the kettle, flange to pipe, spin -on ring, sink bowl cylinder, flange bottom pipe and collection cylinder, the liquid inlet pipe top flange is connected with flange connector, sets up the liquid sink mechanism at the liquid inlet pipe of ion resin tower body, and the liquid sink mechanism constitutes the pretreatment structure at the ion resin tower body of chemical industry wastewater recovery hydrochloric acid, and the sink bowl cylinder in the liquid sink mechanism is provided with three -stage separation hopper, forms the ladder type slow flow channel, and after the slow -flowed wastewater is screened by the bucket sieve body again, and the granular impurity can sink in the sink bowl cylinder, effectively prevent the impurity in chemical industry wastewater from entering the ion resin tower body and blocking the resin, guarantee the low influence chemical treatment when chemical industry wastewater recovers hydrochloric acid in the ion resin tower body.

Description

Technical Field

[0001] This utility model relates to the field of chemical wastewater treatment technology, and in particular to a device for recovering hydrochloric acid from chemical wastewater. Background Technology

[0002] Hydrochloric acid wastewater is commonly found in industries such as fertilizer production, metal surface treatment, petrochemicals, and metallurgy. This wastewater contains high concentrations of hydrochloric acid, sulfuric acid, and their salts. Hydrochloric acid in chemical wastewater is an important chemical raw material. To recover hydrochloric acid from chemical wastewater, the wastewater is first passed through an ion exchange resin tower containing a strongly acidic cation exchange resin. Hydrogen ions in the wastewater exchange with cations on the resin, while chloride ions flow through the resin tower with the water. Then, the resin is regenerated with an appropriate amount of acid solution to restore its exchange capacity, resulting in a hydrochloric acid-rich regenerated solution. After further treatment and concentration, high-purity hydrochloric acid can be recovered, achieving effective utilization of wastewater resources.

[0003] Currently, when chemical wastewater is fed into ion exchange resin towers for hydrochloric acid recovery, suspended solids and organic matter in the wastewater can be adsorbed onto the resin surface or enter the resin interior, causing blockage risks. This reduces the resin's exchange capacity and adsorption performance, leading to a decrease in hydrochloric acid recovery efficiency. Although some ion exchange resin towers employ pretreatment steps to filter larger impurities, a significant amount of particulate impurities still remain in the treated chemical wastewater, affecting its recovery within the resin tower. Therefore, we propose a device for recovering hydrochloric acid from chemical wastewater. Utility Model Content

[0004] The main objective of this invention is to provide a device for recovering hydrochloric acid from chemical wastewater. A settling mechanism is installed at the inlet pipe of the ion exchange resin tower body, forming a pretreatment structure within the tower body. The settling hopper of the settling mechanism is equipped with three-stage partitions to form a stepped slow-flow channel. After the wastewater has flowed slowly, it is screened by the sieve body, allowing particulate impurities to settle in the settling hopper. This effectively prevents impurities in the chemical wastewater from entering the ion exchange resin tower body and clogging the resin, ensuring low-impact treatment of the chemical wastewater during hydrochloric acid recovery within the ion exchange resin tower body. This effectively solves the problems in the background technology.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] A device for recovering hydrochloric acid from chemical wastewater includes an ion exchange resin tower body with an inlet pipe welded to the top of the tank. It also includes a settling mechanism comprising a flange connector, a double-bend connecting pipe, a flange receiving hopper, a flange support tube, a spin-on ring, a settling hopper, a flange bottom pipe, and a collection cylinder. The inlet pipe is flanged at its top and connected to the flange connector, which is welded to the flange receiving hopper via the double-bend connecting pipe. The flange receiving hopper is flanged at its lower opening away from the double-bend connecting pipe and connected to a flange support tube, which is welded to the upper opening of the settling hopper. A spin-on ring is screwed into the body of the flange support tube, and a sieve body is welded and fixed within the ring opening. The bottom of the settling hopper is flanged to the bottom pipe of the collection cylinder, and a flanged pipe is welded to the bottom opening of the collection cylinder. A flanged side pipe is welded to one side of the settling hopper, and a first partition hopper, a second partition hopper, and a third partition hopper are welded upwards within the settling hopper above the flanged side pipe.

[0007] Furthermore, flange connectors and flange feeders are welded to the two ends of the double-bend connecting pipe, and bolts protrude from the flange of the flange connector and the flange of the inlet pipe and are screwed to the nut. Bolts protrude from the flange of the flange feeder and the flange of the flange tube and are screwed to the nut.

[0008] By adopting the above technical solution, after the double-bend connecting pipe is welded with flange and flange receiving hopper, the flange of the flange connecting pipe and the flange of the liquid inlet pipe can be connected by bolts and nuts. At the same time, the flange of the flange receiving hopper and the flange of the flange receiving pipe can be connected by bolts and nuts.

[0009] Furthermore, the inner wall of the flange tube is provided with a threaded tube wall, and a screw-on ring is screwed onto the threaded tube wall of the flange tube.

[0010] By adopting the above technical solution, the flange tube can be connected to the threaded pipe wall by screwing on the screw-on ring.

[0011] Furthermore, a sieve body is welded to the bottom ring opening of the screw-on ring, and the sieve body of the sieve body is centrally convex upward, and the sieve body surface of the sieve body is provided with sieve holes.

[0012] By adopting the above technical solution, after the spun-on ring welded bucket screen body is completed, the bucket screen body protrudes upward, allowing chemical wastewater to pass upward through the screen holes of the bucket screen body under the action of conveying pressure.

[0013] Furthermore, a flange is welded to the bottom of the sinking bucket below the sieve body, and bolts protrude and are screwed onto the flange of the bottom flange tube between the flange of the sinking bucket and the flange of the flange bottom tube.

[0014] By adopting the above technical solution, the flange of the sinking bucket and the flange of the flange bottom pipe can be connected by flange locking with bolts and nuts.

[0015] Furthermore, the inner wall of the sinking bucket is welded to the vertical bucket walls of the first, second, and third partition buckets, and the upper bucket opening diameter of the first partition bucket is larger than that of the second partition bucket, the upper bucket opening diameter of the second partition bucket is larger than that of the third partition bucket, and an arc-shaped through groove is provided through the bucket surface of the first, second, and third partition buckets.

[0016] By adopting the above technical solution, after welding the first partition bucket, the second partition bucket, and the third partition bucket inside the settling bucket, a slow-flow structure can be formed by the first partition bucket, the upward flow speed of chemical wastewater in the settling bucket can be reduced, and at the same time, the arc-shaped grooves of the first partition bucket, the second partition bucket, and the third partition bucket can smoothly allow wastewater to pass through.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] This invention features a settling mechanism installed at the inlet pipe of the ion exchange resin tower body. This settling mechanism forms a pretreatment structure within the ion exchange resin tower body for recovering hydrochloric acid from chemical wastewater. The settling hopper of the settling mechanism is equipped with three-stage partitions to form a stepped slow-flow channel. After the wastewater flows slowly, it is screened by the sieve body, and particulate impurities can settle in the settling hopper, effectively preventing impurities in the chemical wastewater from entering the ion exchange resin tower body and clogging the resin. This ensures low-impact treatment of the chemical wastewater during hydrochloric acid recovery within the ion exchange resin tower body.

[0019] Furthermore, a sewage valve can be connected to the collection cylinder below the settling hopper for periodic discharge, thereby collecting wastewater with a high solids content in the settling hopper. This periodic sludge removal and maintenance of the settling hopper ensures the stable operation of the settling mechanism. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of a chemical wastewater hydrochloric acid recovery device according to the present invention.

[0021] Figure 2 This is a schematic diagram showing the disassembly of the flange support and flange connecting bucket of a chemical wastewater hydrochloric acid recovery device according to this utility model.

[0022] Figure 3 This is an exploded view of the settling mechanism of a chemical wastewater hydrochloric acid recovery device according to this utility model.

[0023] Figure 4 This is a cross-sectional view of the settling hopper of a chemical wastewater hydrochloric acid recovery device according to this utility model.

[0024] In the diagram: 1. Ion exchange resin tower body; 2. Inlet pipe; 3. Settling mechanism; 4. Flange connector; 5. Double bend connecting pipe; 6. Flange receiving hopper; 7. Flange support tube; 8. Screw-on ring; 9. Hopper screen body; 10. Settling hopper cylinder; 11. Flange bottom pipe; 12. Collection cylinder; 13. Flange pipe array; 14. Flange side pipe; 15. First partition hopper; 16. Second partition hopper; 17. Third partition hopper. Detailed Implementation

[0025] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0026] like Figure 1-4 As shown, a device for recovering hydrochloric acid from chemical wastewater includes an ion exchange resin tower body 1. An inlet pipe 2 is welded to the top of the tower body 1. The device also includes a settling mechanism 3, which comprises a flange connector 4, a double-bend connecting pipe 5, a flange receiving hopper 6, a flange support tube 7, a screw-on ring 8, a settling hopper 10, a flange bottom pipe 11, and a collection cylinder 12. The flange connector 4 is flanged at the top of the inlet pipe 2, and the flange connector 4 is welded to the flange receiving hopper 6 via the double-bend connecting pipe 5. A flange is flanged at the lower opening of the flange receiving hopper 6 away from the double-bend connecting pipe 5. The flanged support tube 7 is welded to the upper opening of the sinking bucket 10. A screw-on ring 8 is screwed into the tube body of the flanged support tube 7, and a bucket screen body 9 is welded and fixed inside the ring opening of the screw-on ring 8. The bottom cylinder of the sinking bucket 10 is flanged and connected to the flanged bottom pipe 11 at the top of the collecting cylinder 12. A flanged pipe 13 is welded to the bottom opening of the collecting cylinder 12. A flanged side pipe 14 is welded to the outer cylinder body of one side of the sinking bucket 10. A first partition bucket 15, a second partition bucket 16, and a third partition bucket 17 are arranged upwards and welded inside the sinking bucket 10 above the flanged side pipe 14.

[0027] Among them, flange pipe 4 and flange receiving hopper 6 are welded at both ends of the double bend connecting pipe 5, and bolts pass through the flange of the pipe body of flange pipe 4 and are screwed with nuts between the flange of the inlet pipe 2 and the flange of the flange receiving hopper 6 and the flange of the flange tube 7.

[0028] By adopting the above technical solution, after the double-bend connecting pipe 5 is welded to the flange connecting pipe 4 and the flange receiving hopper 6, the flange of the flange connecting pipe 4 and the flange of the liquid inlet pipe 2 can be connected by bolts and nuts. At the same time, the flange of the flange receiving hopper 6 and the flange of the flange connecting pipe 7 can be connected by bolts and nuts.

[0029] The flange tube 7 has a threaded pipe wall on its inner wall, and a screw-on ring 8 is screwed onto the threaded pipe wall of the flange tube 7.

[0030] By adopting the above technical solution, the flange tube 7 can be connected to the threaded pipe wall by screwing on the screw-on ring 8.

[0031] Among them, the bottom ring opening of the screw-on ring 8 is welded with a bucket screen body 9, and the screen body of the bucket screen body 9 is centered and protrudes upward, and the screen body surface of the bucket screen body 9 is provided with screen holes.

[0032] By adopting the above technical solution, after the swivel ring 8 is welded to the bucket screen body 9, the bucket screen body 9 protrudes upward, so that the chemical wastewater can pass upward through the screen holes of the bucket screen body 9 under the action of conveying pressure.

[0033] Among them, the bottom of the sinking bucket 10 below the sieve body 9 is welded with a flange, and there are bolts that pass through and are screwed to the flange of the bottom flange tube 11.

[0034] By adopting the above technical solution, the flange of the sinking bucket 10 and the flange of the flange bottom pipe 11 can be connected by bolts and nuts for flange locking.

[0035] The inner wall of the sinking bucket 10 is welded to the vertical bucket walls of the first partition bucket 15, the second partition bucket 16 and the third partition bucket 17. The upper bucket opening diameter of the first partition bucket 15 is larger than that of the second partition bucket 16, and the upper bucket opening diameter of the second partition bucket 16 is larger than that of the third partition bucket 17. Arc through grooves are provided through the bucket surfaces of the first partition bucket 15, the second partition bucket 16 and the third partition bucket 17.

[0036] By adopting the above technical solution, after welding the first partition 15, the second partition 16 and the third partition 17 inside the settling hopper 10, a slow-flow structure can be formed by the first partition 15, the second partition 16 and the third partition 17, which reduces the upward flow speed of chemical wastewater in the settling hopper 10. At the same time, the arc-shaped grooves of the first partition 15, the second partition 16 and the third partition 17 can smoothly allow wastewater to pass through.

[0037] It should be noted that this utility model is a device for recovering hydrochloric acid from chemical wastewater. A settling mechanism 3 is installed at the inlet pipe 2 of the ion exchange resin tower body 1. The double-bend connecting pipe 5 of the settling mechanism 3 is flanged at the inlet pipe 2 via a flange connecting pipe 4. Then, the screw-on ring 8 can rotate inside the settling hopper 10. The other set of pipes of the double-bend connecting pipe 5 can be flanged to the flange connecting pipe 7 above the settling hopper 10 via a flange connecting hopper 6. At the same time, the bottom flange pipe 11 above the collecting cylinder 12 is flanged at the bottom of the settling hopper 10. The flanged pipe 13 below the collection cylinder 12 can be connected to the inlet pipe of an external sewage treatment device via a sewage valve, while the flanged side pipe 14 can also be connected to the chemical wastewater pipe via a sewage valve. The chemical wastewater pipe can be pumped into the settling hopper 10 by a sewage pump after simple filtration of large impurities. When water enters the settling hopper 10, the sewage valve below the flanged pipe 13 needs to be manually closed. Then, the chemical wastewater flows slowly upward at the settling hopper 10 through the first partition 15, the second partition 16, and the third partition 17. The chemical wastewater after slow flow... After passing through the sieve body 9, the particulate impurities in the chemical wastewater enter the inlet pipe 2 via the flange connecting hopper 6, double-bend connecting pipe 5, and flange connecting pipe 4. The impurities are effectively filtered after passing through the slow flow and sieve body 9, and then flow downwards into the ion exchange resin tower body 1 for adsorption treatment. The resin is then regenerated with an appropriate amount of acid solution to restore its exchange capacity, resulting in a hydrochloric acid-rich regenerated liquid. This regenerated liquid can then be further processed and concentrated to recover high-purity hydrochloric acid. The settling hopper 10 requires regular maintenance. During maintenance, the sewage valve at the flange side pipe 14 is closed, and the sewage valve at the flange bottom pipe 11 is opened. The wastewater containing particles in the settling hopper 10 can be discharged downwards along the collection cylinder 12 to the inlet pipe of an external wastewater treatment equipment for further treatment. The flange connecting hopper 6 and flange connecting pipe 7 can be disassembled, and the screw-on ring 8 can be unscrewed to periodically clean the sieve head 9. A protruding handle can be installed inside the screw-on ring 8 for easy rotation. A support frame of appropriate height can be welded at the bottom of the collection cylinder 12 by professional welding technicians for effective support.

[0038] It should be noted that this utility model is a device for recovering hydrochloric acid from chemical wastewater. All components in this utility model are known to those skilled in the art, and their structure and principle can be learned by those skilled in the art through technical manuals or conventional experimental methods.

[0039] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A device for recovering hydrochloric acid from chemical wastewater, comprising an ion exchange resin tower body (1), wherein an inlet pipe (2) is welded to the top of the tower tank of the ion exchange resin tower body (1), characterized in that: It also includes a settling mechanism (3), which includes a flange connector (4), a double-bend connecting pipe (5), a flange receiving hopper (6), a flange support tube (7), a screw-on ring (8), a settling hopper (10), a flange bottom pipe (11), and a collection cylinder (12). The flange connector (4) is connected to the top flange of the inlet pipe (2), and the flange connector (4) is interconnected and welded to the flange receiving hopper (6) through the double-bend connecting pipe (5). The flange support tube (7) is connected to the flange receiving hopper (6) at the lower opening away from the double-bend connecting pipe (5), and the flange support tube (7) is interconnected and welded to the upper part of the settling hopper (10). Inside the cylinder, a screw-on ring (8) is screwed into the tube body of the flange tube (7), and a sieve body (9) is welded and fixed inside the ring opening of the screw-on ring (8). The bottom cylinder of the sinking hopper (10) is flanged and connected to the flange bottom pipe (11) at the top of the collecting cylinder (12), and a flange row pipe (13) is welded to the bottom cylinder opening of the collecting cylinder (12). A flange side pipe (14) is welded to the outside of one side cylinder of the sinking hopper (10), and a first partition hopper (15), a second partition hopper (16), and a third partition hopper (17) are arranged upwards and welded inside the sinking hopper (10) above the flange side pipe (14).

2. The chemical wastewater hydrochloric acid recovery device according to claim 1, characterized in that: The double-bend connecting pipe (5) has flange connecting pipe (4) and flange receiving hopper (6) welded at both ends of the pipe opening. The flange of the pipe body of flange connecting pipe (4) and the flange of the liquid inlet pipe (2) are connected by bolts and nuts. The flange of flange receiving hopper (6) and the flange of flange receiving tube (7) are connected by bolts and nuts.

3. The chemical wastewater hydrochloric acid recovery device according to claim 2, characterized in that: The inner wall of the flange tube (7) is provided with a threaded pipe wall, and a screw-on ring (8) is screwed onto the threaded pipe wall of the flange tube (7).

4. The chemical wastewater hydrochloric acid recovery device according to claim 3, characterized in that: The bottom ring of the screw-on ring (8) is welded with a sieve body (9), and the sieve body of the sieve body (9) is centered and protrudes upward. The sieve body surface of the sieve body (9) is provided with sieve holes.

5. The chemical wastewater hydrochloric acid recovery device according to claim 4, characterized in that: A flange is welded to the bottom of the sinking bucket (10) below the sieve body (9), and bolts pass through and are screwed to the flange of the bottom flange tube (11).

6. The chemical wastewater hydrochloric acid recovery device according to claim 5, characterized in that: The inner wall of the sinking bucket (10) is welded to the vertical bucket walls of the first partition bucket (15), the second partition bucket (16) and the third partition bucket (17), and the upper bucket opening diameter of the first partition bucket (15) is larger than that of the second partition bucket (16), the upper bucket opening diameter of the second partition bucket (16) is larger than that of the third partition bucket (17), and an arc through groove is provided through the bucket surface of the first partition bucket (15), the second partition bucket (16) and the third partition bucket (17).

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