Advanced treatment equipment for chemical wastewater

Abstract

The utility model discloses advanced treatment equipment for chemical wastewater, which belongs to the technical field of sewage treatment equipment and comprises an adding tank, a flocculation tank and a storage tank, an adding pipe is erected on the storage tank above the adding tank, a water inlet mechanism is erected in the adding tank, and a water outlet mechanism is erected in the flocculation tank. The water inlet mechanism is used for conveying sewage to the adding tank. Through the arrangement of the adding tank and the flocculation tank, sewage enters the adding tank to be subjected to a reduction reaction, dissolved heavy metal is separated out, the sewage carries out precipitated solid impurities to enter the flocculation tank, and flocculates on the upper layer enter the sedimentation tank along the overflow channel along with the sewage through flocculation air flotation separation to be subjected to speed reduction sedimentation separation; it is guaranteed that sewage can be separated from flocculate, the separated sewage enters the adding pool through the backflow pipe for the second time, and heavy metal is sufficiently separated out and purified.

Description

Technical Field

[0001] The utility model belongs to the technical field of sewage treatment equipment, and particularly relates to a chemical wastewater deep treatment equipment. Background Art

[0002] Chemical sewage contains heavy metal ions, which are extremely harmful to the environment and human health. When reusing treated sewage, effectively separating and removing heavy metals in chemical sewage is an important task for environmental protection.

[0003] In the Chinese invention patent with the publication number CN118255408A, it is mentioned that when the feeding scraper moves downward in a state of fitting the inner surface of the slag skimming bucket, it will completely scrape the dirt remaining on the inner surface of the slag skimming bucket downward, so that there is no dirt residue on the inner surface of the slag skimming bucket, improving the efficiency of wastewater treatment.

[0004] However, in the treatment of chemical sewage, a reducing agent needs to be added to reduce the dissolved heavy metal substances in the sewage into solid substances and precipitate them from the sewage. During the reaction process, because the reducing agent and the sewage need to be fully contacted, after the addition of the reducing agent, a long mixing reaction time is required, resulting in a long reaction process time and affecting the treatment time for the precipitation of heavy metals in the sewage. In view of this, a chemical wastewater deep treatment equipment is provided. Summary of the Invention

[0005] The technical problem to be solved by the utility model is to overcome the above-mentioned disadvantages of the prior art and provide a chemical wastewater deep treatment equipment.

[0006] The technical solution adopted to solve the above technical problem is as follows:

[0007] A chemical wastewater deep treatment equipment includes an addition tank, a flocculation tank and a storage tank. An addition pipe is erected above the addition tank, and a water inlet mechanism is erected in the addition tank, and the water inlet mechanism conveys sewage to the addition tank.

[0008] The water inlet mechanism includes an inlet pipe, the inlet pipe is provided with a plurality of vertically arranged outlet pipes at equal intervals, a cross pipe is installed at the bottom end of the outlet pipe, a water outlet shell is rotatably installed on the cross pipe, the water outlet shell is vertically arranged, an opening is provided at the top of the water outlet shell, a spiral fin is installed at the opening of the water outlet shell, and fins are installed at the lower end of the water outlet shell.

[0009] Furthermore, the addition pipe adopts a tee pipe. The inlet of the addition pipe is communicated with the internal space of the storage tank, and the two outlets of the addition pipe are respectively arranged above the addition tank and the flocculation tank, and vertical extension pipes are installed at both outlets.

[0010] Furthermore, the water inlet mechanism also includes a reversing block, which is located at the outlet of the water outlet shell. The reversing blocks are arranged in a ring array and form a water outlet. An annular shell is connected between the reversing block and the spiral sheet.

[0011] Furthermore, the water inlet mechanism also includes a sleeve, the middle part of the sleeve is set through, the sleeve is coaxially sleeved and installed on the outside of the spiral piece to form a water passage, the circumferential outer wall of the spiral piece is fixedly connected to the circumferential inner wall of the sleeve, and the sleeve is fixedly connected to the water outlet shell.

[0012] Furthermore, the water inlet mechanism also includes a top cover, which is located directly above the outlet of the water outlet shell, with a water gap between the top cover and the spiral sheet, and a vertical rod is provided in the middle of the top cover, and the vertical rod is fixedly connected to the water outlet shell.

[0013] Furthermore, the flocculation tank includes an overflow channel, which is located at the top opening of the flocculation tank. A sedimentation tank is provided at the outlet of the overflow channel. A speed reduction plate is provided on the upper layer of the sedimentation tank. A water pipe is connected between the flocculation tank and the addition tank.

[0014] Furthermore, a reflux pipe is provided at the lower layer of the sedimentation tank, a dispersion pipe is installed at the outlet of the reflux pipe, and the dispersion pipe is horizontally arranged along the top opening of the addition tank.

[0015] Through the above technical solution, the beneficial effects of the utility model are as follows:

[0016] (1) The utility model sets up an addition tank and a flocculation tank. The sewage enters the addition tank for reduction reaction to precipitate dissolved heavy metals. The sewage carries the precipitated solid impurities into the flocculation tank and is separated by flocculation flotation. The flocculants on the upper layer enter the sedimentation tank along the overflow channel with the sewage for deceleration and sedimentation separation to ensure that the sewage can be separated from the flocculants. The separated sewage enters the addition tank for the second time through the return pipe to fully precipitate and purify the heavy metals.

[0017] (2) The utility model optimizes the water inlet mechanism. When sewage enters the addition tank through the water inlet mechanism, the water outlet shell cooperates with the reversing block and the spiral blade to disperse the sewage into the addition tank in the horizontal and vertical directions. At the same time, the water flow impacts the reversing block and the spiral blade, which drives the water outlet shell to rotate, disperses the sewage to the surroundings and sprays it, and drives the fins to rotate to disturb the surrounding sewage, so as to stir and mix the reducing agent and sewage, and quickly reduce and precipitate the heavy metals. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the utility model;

[0019] Figure 2 It is a top view structural diagram of the utility model;

[0020] Figure 3 is the disassembly schematic diagram of the present utility model;

[0021] Figure 4 is the partial structural schematic diagram of the present utility model.

[0022] Reference numerals: 1, water inlet mechanism; 11, water inlet pipe; 12, water outlet housing; 13, reversing block; 14, fin; 15, water outlet; 16, water passing channel; 17, spiral blade; 18, sleeve; 19, top cover; 2, adding tank; 3, flocculation tank; 31, overflow channel; 32, sedimentation tank; 33, water passing pipe; 34, speed reducing plate; 4, return pipe; 5, storage tank; 6, adding pipe. Specific embodiments

[0023] In order to make the purpose, technical solutions and advantages of the present 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 only used to explain the present utility model and are not used to limit the present utility model.

[0024] As Figures 1 - 4 shown, this embodiment provides a chemical wastewater advanced treatment device, including an adding tank 2, a flocculation tank 3 and a storage tank 5. When treating sewage, it is necessary to separate the internal solid impurities and dissolved heavy metal substances. When treating the dissolved heavy metals, chemical reduction is required to precipitate them in the form of solid impurities, and then the solid impurities are separated from the sewage by flocculation, and finally the advanced treatment of the sewage is realized. During operation, a water inlet mechanism 1 is installed in the adding tank 2, and the water inlet mechanism 1 conveys sewage to the adding tank 2. During this process, a adding pipe 6 is installed above the adding tank 2 by the storage tank 5, and the adding pipe 6 adds heavy metal reducing agent and flocculant to the adding tank 2, so that the heavy metals are precipitated and flocculated and suspended in the sewage. Then the mixture is input into the flocculation tank 3, and then the sewage is discharged from the bottom valve, and an air inlet pipe is arranged in the middle of the flocculation tank 3 to distribute gas in the sewage, so that the flocs are driven by air flotation to overflow from the top of the flocculation tank 3 for unified collection;

[0025] To achieve an efficient heavy metal reduction reaction, it is necessary to quickly mix the reducing agent with the sewage. The reducing agent will be directly added to the adding tank 2. In view of this, the structure of the water inlet mechanism 1 is optimized. Refer to Figure 2 and Figure 3, the water inlet mechanism 1 includes a water inlet pipe 11. The water inlet pipe 11 has a horizontally arranged main pipe. The water inlet pipe 11 is provided with a plurality of vertically arranged water outlet pipes arranged at equal intervals. The top of the water outlet pipe is conductively connected to the main pipe to disperse and input sewage into the addition tank 2. Moreover, a horizontal pipe is installed at the bottom end of the water outlet pipe, and a water outlet housing 12 is rotatably installed on the horizontal pipe. There are a plurality of water outlet housings 12, which can be fully dispersed in the bottom space of the addition tank 2, so that the sewage can enter more dispersedly, and be in dispersed contact with the mixture in the addition tank 2, and can efficiently carry out a reduction reaction on the sewage. Among them, the water outlet housing 12 is vertically arranged, and an opening is provided at the top of the water outlet housing 12. The sewage enters the addition tank 2 from bottom to top and can be sprayed and dissipated upward along the height direction, and be more quickly dispersed into the space of the addition tank 2. A spiral fin 17 is installed at the opening of the water outlet housing 12. When the sewage enters, the water flow will impact the spiral fin 17, causing the water outlet housing 12 to continuously rotate with the outflow of water. At this time, fins 14 are installed at the lower end of the water outlet housing 12. The rotation of the fins 14 will drive the water flow around the water outlet housing 12, and the fins 14 are inclined, which can push the water around the water outlet housing 12 in all directions to generate a continuous water flow and quickly disperse the sewage flowing out of the water outlet housing 12 in all directions.

[0026] In a further embodiment, to achieve sufficient deep separation, it is necessary to ensure that the reducing agent is relatively excessive. Refer to Figure 2 and Figure 3 , the addition pipe 6 is a tee pipe. Among them, the inlet of the addition pipe 6 is conductively connected to the internal space of the storage tank 5. The storage tank 5 is divided into two independent spaces up and down. The upper space is filled with a reducing agent, and the lower space is filled with a flocculant. A pumping device is provided in the storage tank 5. The pumping device is a metering pump. The inlet of the pumping device is conductively connected to the upper and lower spaces of the storage tank 5 through pipes respectively, and the outlet of the pumping device is connected to the addition pipe 6. Among them, the two outlets of the addition pipe 6 are respectively arranged above the addition tank 2 and the flocculation tank 3, and vertical extension pipes are installed at both outlets. When adding the reducing agent, the reducing agent will be directly added to the addition tank 2. The pumping device can control the feeding amount to ensure that the reducing agent is excessive, and fully react to precipitate heavy metals. At the same time, when the sewage enters the flocculation tank 3, the pumping device will add a flocculant to the flocculation tank 3 to ensure that the heavy metal solid impurities precipitated in the sewage can be fully flocculated and separated.

[0027] In a further embodiment, refer to Figure 4, the water inlet mechanism 1 further includes a reversing block 13. The reversing block 13 is located at the outlet position of the water outlet shell 12. The reversing block 13 has a shape similar to "<", and its tip is arranged close to the outlet of the water outlet shell 12. Moreover, the reversing blocks 13 are arranged in an annular array. Water outlet ports 15 will be formed between adjacent reversing blocks 13. The inner diameter of the water outlet ports 15 gradually decreases as it moves away from the tip of the reversing block 13, which can reduce the diameter and increase the pressure of the sewage passing through, causing the sewage to spray out at high speed, increasing the initial velocity when entering the addition tank 2, and enabling it to be dispersed over a larger area in the addition tank 2, making dispersed contact with the reducing agent in the addition tank 2. A ring shell is connected between the reversing block 13 and the spiral blade 17. The ring shell ensures that part of the sewage can flow upward through the position of the spiral blade 17, preventing the situation where the water outlet shell 12 cannot rotate due to the sewage not being able to contact the spiral blade 17. Moreover, the extending direction of the water outlet port 15 forms an angle with the radial direction of the water outlet shell 12, generating a reaction force during water discharge, and cooperating with the spiral blade 17 to make the water outlet shell 12 rotate at high speed, fully mixing the newly entered sewage with the mixture of sewage and reducing agent in the addition tank 2.

[0028] In a further embodiment, referring to Figure 4 , the water inlet mechanism 1 further includes a sleeve 18. The sleeve 18 is a hollow annular structure with a through middle part to ensure the passage of sewage. The sleeve 18 is coaxially sleeved outside the spiral blade 17, and the circumferential outer wall of the spiral blade 17 is fixedly connected to the circumferential inner wall of the sleeve 18 to reinforce the spiral blade 17 and prevent its deformation. At the same time, the sleeve 18 is fixedly connected to the water outlet shell 12. Part of the sewage sprayed out from the water outlet shell 12 will enter the water passage 16 in the sleeve 18, fully impacting the lower side wall of the spiral blade 17, separating from the spiral blade 17 from the top after sufficient contact, and making full use of the height of the spiral blade 17 to make the water outlet shell 12 rotate at high speed.

[0029] In a further embodiment, referring to Figure 4 , the water inlet mechanism 1 further includes a top cover 19. To prevent solid debris from directly falling into the water outlet shell 12, the top cover 19 is located directly above the outlet of the water outlet shell 12, which can prevent the descending solid debris from entering the water outlet shell 12. A water passing gap is left between the top cover 19 and the spiral blade 17 to facilitate the free discharge of sewage. At the same time, a vertical rod is provided in the middle of the top cover 19, and the vertical rod is fixedly connected to the water outlet shell 12 to fix the top cover 19 and ensure the stability of the water passing gap.

[0030] In a further embodiment, referring to Figure 3, the flocculation tank 3 includes an overflow channel 31. The overflow channel 31 has an upward opening and is arranged at the upper opening position of the flocculation tank 3. After the sewage enters, the flocs will be pushed up by the gas. As part of the upper-layer sewage overflows into the overflow channel 31, and the overflow channel 31 is located at the top opening of the flocculation tank 3. The overflowed flocs and sewage will flow along the overflow channel 31. A sedimentation tank 32 is provided at the outlet of the overflow channel 31. The mixture enters the sedimentation tank 32. A speed reduction plate 34 is provided on the upper layer of the sedimentation tank 32. The flocs are blocked by the speed reduction plate 34 to reduce the speed. The sewage passes over the top of the speed reduction plate 34 and is discharged from the water outlet pipe on the vertical side wall of the sedimentation tank 32. The flocs settle at the bottom of the sedimentation tank 32 and can be discharged from the bottom waste outlet position of the sedimentation tank 32. At the same time, a water pipe 33 is connected between the flocculation tank 3 and the addition tank 2. The water pipe 33 is located above the addition tank 2. After the liquid level in the addition tank 2 rises, it is ensured that the sewage in the addition tank 2 can enter the flocculation tank 3 from the upper part through the water pipe 33.

[0031] In a further embodiment, referring to Figure 3 , a return pipe 4 is provided in the lower layer of the sedimentation tank 32. A dispersion pipe is installed at the outlet of the return pipe 4. The dispersion pipe is horizontally arranged along the top opening of the addition tank 2, and part of the overflowed sewage can be conveyed back to the addition tank 2 for secondary reduction to ensure the full and thorough reduction of heavy metals.

[0032] The working principle of this embodiment is as follows:

[0033] The sewage is dispersed and added to the bottom of the addition tank 2 through the water inlet pipe 11. An outlet housing 12 is installed at the bottom outlet position of the water inlet pipe 11. The outlet housing 12 has an upward opening, so that the sewage is sprayed upward into the addition tank 2, and contacts the sewage and the reducing agent in the addition tank 2 from bottom to top for rapid contact reaction;

[0034] A horizontal reversing block 13 is installed at the outlet position of the outlet housing 12. An outlet 15 is formed between the reversing blocks 13. The outlet 15 forms an angle with the radial direction of the outlet housing 12, and through the reaction force generated by the sewage spraying, a spiral fin 17 is installed at the top of the outlet housing 12. Part of the sewage flows upward along the sleeve 18, scouring the bottom side wall of the spiral fin 17 to drive the outlet housing 12 to rotate, and cooperating with the fin 14 to disturb the surrounding sewage, so that the sewage is dispersed in all directions and reacts efficiently with the reducing agent;

[0035] The mixed sewage and the suspended precipitated solid heavy metal impurities enter the flocculation tank 3 along the water pipe 33, and solid-liquid separation is carried out through flocculation air flotation. The upper-layer flocs and sewage will enter the sedimentation tank 32 from the overflow channel 31, so that the overflowed sewage and the flocs are separated by reducing the speed and settling, and part of the sewage will be conveyed back to the addition tank 2 for secondary reaction to ensure that the dissolved heavy metals can be completely precipitated.

[0036] The above is only a preferred embodiment of the present utility model and is not intended to limit the protection scope of the present utility model.

Claims

1. A chemical wastewater deep treatment equipment, comprising an addition tank (2), a flocculation tank (3) and a storage box (5), wherein the storage box (5) is located above the addition tank (2) and is provided with an addition pipe (6), characterized in that: A water inlet mechanism (1) is installed in the adding pool (2), and the water inlet mechanism (1) transports sewage to the adding pool (2); The water inlet mechanism (1) comprises a water inlet pipe (11), the water inlet pipe (11) is provided with a plurality of vertical water outlet pipes arranged at equal intervals, a horizontal pipe is installed at the bottom end of the water outlet pipe, a water outlet shell (12) is rotatably installed on the horizontal pipe, the water outlet shell (12) is vertically arranged, an opening is provided at the top of the water outlet shell (12), a spiral blade (17) is installed at the opening of the water outlet shell (12), and a fin (14) is installed at the lower end of the water outlet shell (12).

2. The chemical wastewater deep treatment equipment according to claim 1, characterized in that: The addition pipe (6) is a three-way pipe, the inlet of the addition pipe (6) is connected to the internal space of the storage box (5), and the two outlets of the addition pipe (6) are respectively arranged above the addition tank (2) and the flocculation tank (3), and vertical extension pipes are installed at the two outlets.

3. The chemical wastewater deep treatment equipment according to claim 1, characterized in that: The water inlet mechanism (1) further comprises a reversing block (13), the reversing block (13) being located at the outlet of the water outlet housing (12), the reversing blocks (13) being arranged in a ring array and forming a water outlet (15), and an annular housing being connected between the reversing block (13) and the spiral sheet (17).

4. The chemical wastewater deep treatment equipment according to claim 1, characterized in that: The water inlet mechanism (1) further comprises a sleeve (18), the middle portion of the sleeve (18) is provided through, the sleeve (18) is coaxially sleeved and installed on the outside of the spiral blade (17) to form a water passage (16), the circumferential outer wall of the spiral blade (17) is fixedly connected to the circumferential inner wall of the sleeve (18), and the sleeve (18) is fixedly connected to the water outlet housing (12).

5. The chemical wastewater deep treatment equipment according to claim 1, characterized in that: The water inlet mechanism (1) further comprises a top cover (19), wherein the top cover (19) is located directly above the outlet of the water outlet housing (12), a water-passing gap is left between the top cover (19) and the spiral blade (17), and a vertical rod is arranged in the middle of the top cover (19), wherein the vertical rod is fixedly connected to the water outlet housing (12).

6. The chemical wastewater deep treatment equipment according to claim 1, characterized in that: The flocculation tank (3) comprises an overflow channel (31), the overflow channel (31) is located at the top opening of the flocculation tank (3), a sedimentation tank (32) is provided at the outlet of the overflow channel (31), a speed reduction plate (34) is provided on the upper layer of the sedimentation tank (32), and a water pipe (33) is connected between the flocculation tank (3) and the addition tank (2).

7. The chemical wastewater deep treatment equipment according to claim 6, characterized in that: The lower layer of the sedimentation tank (32) is provided with a reflux pipe (4), and a dispersion pipe is installed at the outlet of the reflux pipe (4), and the dispersion pipe is arranged horizontally along the top opening of the addition tank (2).

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