Sewage recycling device in coal coking production

Abstract

The utility model relates to the technical field of sewage recycling devices, in particular to a sewage recycling device in coal coking production, which is characterized in that a settling baffle is fixedly communicated with the upper side wall of a settling box, a flocculation box is integrally arranged on the right side of the settling box, a square filter screen is embedded in an overflow window, and a water outlet is formed in the right side of the settling box. A stirring assembly is arranged in the flocculation box, the bottom of the flocculation box fixedly communicates with the inlet end of a discharge pipe, the outlet end of the discharge pipe abuts against the left end of a circular filter screen, and the right end of the circular filter screen abuts against the inlet end of a guide pipe; the outlet end of the discharge pipe, the circular filter screen and the inlet end of the guide pipe are connected through flanges, a first discharge valve is mounted on the guide pipe, an ozone pool is correspondingly arranged at the outlet end of the guide pipe, and the transverse moving device is connected with a plurality of ozone generators which are uniformly distributed in the longitudinal direction. The bottom of the ozone tank is fixedly communicated with an inlet end of a circulating water pipe, and a second discharge valve is mounted at the upper end of the circulating water pipe.

Description

Technical Field

[0001] This utility model relates to the technical field of wastewater recycling and treatment devices, and in particular to a wastewater recycling and treatment device for coal coking production. Background Technology

[0002] Wastewater treatment in coking plants is a crucial part of production. It contains a large number of harmful substances that endanger human health and pollute the environment. If discharged in excess of the standard, it can cause acute or chronic poisoning to nearby residents, stimulate the respiratory center, induce nervous system disorders, and damage liver and kidney function. Therefore, wastewater treatment is an important process that coking plants need to maintain continuously.

[0003] Currently, coking plants typically treat coking wastewater using physicochemical or biological methods. However, in practice, it has been found that physicochemical methods are costly and place a heavy burden on the plant, while biological methods are not only time-consuming but also fail to meet standards for ammonia nitrogen and COD levels, requiring further treatment. Therefore, this application proposes a wastewater recycling and treatment device for coal coking production to address these issues. Utility Model Content

[0004] To address the above situation and overcome the shortcomings of existing technologies, this utility model provides a wastewater recycling and treatment device for coal coking production. The technical solution includes a settling tank with an inlet pipe fixedly connected to its upper end. The settling tank is characterized by a settling baffle fixedly connected to its upper side wall. A flocculation tank is integrally arranged on the right side of the settling tank. An overflow window communicating with the flocculation tank is provided on the right side wall of the settling tank, and a square filter screen is embedded in the overflow window. A stirring assembly is arranged inside the flocculation tank, and a discharge pipe is fixedly connected to the bottom of the flocculation tank. At the inlet end, the outlet end of the discharge pipe abuts against the left end of a circular filter screen, and the right end of the circular filter screen abuts against the inlet end of a conduit. The outlet end of the discharge pipe, the circular filter screen, and the inlet end of the conduit are connected by a flange connection. A first discharge valve is installed on the conduit. An ozone pool is arranged correspondingly at the outlet end of the conduit. A transverse movement device is arranged inside the ozone pool. The transverse movement device is connected to multiple ozone generators evenly distributed along the longitudinal direction. The bottom of the ozone pool is fixedly connected to the inlet end of a circulating water pipe, and a second discharge valve is installed at the upper end of the circulating water pipe.

[0005] Preferably, the transverse movement device includes two horizontal bars arranged longitudinally at intervals and fixedly connected to the inner wall of the ozone tank. A reciprocating screw, rotatably connected to the inner wall of the ozone tank, is arranged between the two horizontal bars. The reciprocating screw is threadedly connected to the middle part of the transverse movement bar. The transverse movement bar is also slidably connected to the two horizontal bars. Multiple sets of longitudinally evenly distributed vertical bars are fixedly connected to the lower end of the transverse movement bar. Each vertical bar is fixedly connected to a clamp at its lower end. The clamp corresponds to and is fixedly connected to an ozone generator. A drive motor for driving the reciprocating screw is fixedly connected to the right end of the ozone tank.

[0006] Preferably, the inner wall of the ozone pool is fixedly connected with a shield to block the reciprocating lead screw and crossbar.

[0007] Preferably, the stirring assembly includes a bracket fixedly connected to the upper end of the flocculation box, a stirring shaft coaxially arranged with the flocculation box is rotatably connected to the bracket, a plurality of stirring rods evenly distributed vertically are integrally connected to the stirring shaft, and a stirring motor for driving the stirring shaft is fixedly connected to the upper end of the bracket.

[0008] Preferably, the bottom of the settling tank is fixedly connected to a first drain pipe, and a first drain valve is installed on the first drain pipe; the bottom of the flocculation tank is fixedly connected to a second drain pipe, and a second drain valve is installed on the second drain pipe.

[0009] The beneficial effects of this utility model are:

[0010] 1. In use, the coking wastewater to be treated is sent into the settling tank through the inlet pipe to settle the heavier impurities. The clear liquid on the top overflows into the flocculation tank through the square filter screen at the overflow window. After entering the flocculation tank, an appropriate amount of flocculant is added to the flocculation tank to cyanide the coking wastewater. The cyanided wastewater forms ferrocyanide and ferrous cyanide precipitates, reducing the COD value of the coking wastewater. The stirring component can improve the flocculation efficiency. The flocculated wastewater is then transported to the ozone pool for further sterilization and purification through the discharge pipe and conduit. After that, it can be sent to the circulating water network for utilization through the circulating water pipe. This application has a simple structure, is easy to use, and has strong practicality.

[0011] 2. Furthermore, in order to ensure that the wastewater entering the settling tank reaches the bottom to the maximum extent, thereby facilitating the settling of heavier impurities, a settling baffle is installed to restrict the flow. This allows the wastewater entering the settling tank through the inlet pipe to reach the bottom, thus facilitating the settling of heavier impurities after they reach the bottom. Attached Figure Description

[0012] Figure 1 This is a full sectional front view of the present invention.

[0013] Figure 2This is an enlarged view of region A in the full sectional front view of this utility model.

[0014] Figure 3 This is a partial three-dimensional view from the first perspective of this utility model.

[0015] Figure 4 This is a partial stereoscopic view of the present invention from a second perspective.

[0016] Figure 5 This is a third-person perspective stereoscopic view of the present invention.

[0017] Figure Labels

[0018] 1. Settling tank, 2. Inlet pipe, 3. Settling baffle, 4. Flocculation tank, 5. Overflow window, 6. Square filter screen, 7. Agitator assembly, 8. Discharge pipe, 9. Circular filter screen, 10. Conduit, 11. First discharge valve, 12. Ozone tank, 13. Lateral movement device, 14. Ozone generator, 15. Circulating water pipe, 16. Second discharge valve, 17. Horizontal bar, 18. Reciprocating screw, 19. Lateral movement rod, 20. Vertical bar, 21. Clamp, 22. Drive motor, 23. Baffle, 24. Support, 25. Agitator shaft, 26. Agitator rod, 27. Agitator motor, 28. First drain pipe, 29. First drain pipe, 30. Second drain pipe, 31. Second drain valve. Detailed Implementation

[0019] The following is in conjunction with the appendix Figure 1-5 The specific embodiments of this utility model will be described in further detail.

[0020] In Embodiment 1, the technical solution is that the outlet end of the circulating water pipe 15 can be connected to the circulating water network of the plant area to facilitate the recycling of treated coking wastewater. In use, the coking wastewater to be treated is sent to the settling tank 1 through the inlet pipe 2 to settle heavier impurities. The clear liquid overflows through the square filter screen 6 at the overflow window 5 into the flocculation tank 4. After entering the flocculation tank 4, an appropriate amount of flocculant is added to flocculate and cyanide the coking wastewater. The cyanided wastewater forms ferrocyanide and ferrous cyanide precipitates, reducing the COD value of the coking wastewater. The stirring component 7 further enhances the flocculation efficiency. The flocculated wastewater is then transported to the ozone pool 12 through the discharge pipe 8 and conduit 10 for further sterilization and purification. Afterward, it can be recycled back into the circulating water network through the circulating water pipe 15. This application has a simple structure, is easy to use, and is highly practical. Furthermore, in order to ensure that the wastewater entering the settling tank 1 reaches the bottom to the maximum extent, thereby facilitating the settling of heavy impurities, a settling baffle 3 is arranged to restrict the flow, so that the wastewater entering the settling tank 1 through the inlet pipe 2 can reach the bottom, thereby facilitating the settling of heavy impurities after they reach the bottom.

[0021] In Example 2, based on Example 1, specifically, in use, coking wastewater enters settling tank 1 through inlet pipe 2 for primary treatment. Settling baffle 3 restricts the flow space of coking wastewater entering settling tank 1. Thus, under the obstruction and restriction of settling baffle 3, it can be ensured that the wastewater entering settling tank 1 can reach the bottom, thereby allowing the heavier impurities in the coking wastewater to settle to the bottom. The supernatant can then enter flocculation tank 4 through square filter screen 6 for secondary treatment.

[0022] After the coking wastewater enters the flocculation tank 4, an appropriate amount of flocculant is added to cyanide the wastewater, causing the metal ions in the wastewater to precipitate as ferrocyanide and ferrous cyanide, thereby further removing pollutants from the wastewater and reducing its COD value. To improve flocculation efficiency, this application also includes a stirring assembly 7. Starting the stirring motor 27 of the stirring assembly 7 will drive the stirring shaft 25 on the support 24 to rotate. The stirring shaft 25, along with the stirring rod 26, will stir the wastewater in the flocculation tank 4, ensuring thorough mixing with the flocculant, thus rapidly completing cyanide treatment and further removing pollutants from the wastewater.

[0023] After flocculation is completed, the first discharge valve 11 on the conduit 10 is opened, and the wastewater that has undergone secondary treatment in the flocculation tank 4 enters the ozone pool 12 through the discharge pipe 8 and the conduit 10 for tertiary treatment. A circular filter screen 9 is arranged at the junction of the discharge pipe 8 and the conduit 10 to prevent cyanide precipitation and other substances from entering the ozone pool 12. After the secondary-treated wastewater enters the ozone pool 12, the ozone generator 14 is activated to generate ozone. Under the action of ozone, the secondary-treated wastewater can be sterilized and purified. Furthermore, to facilitate the uniform distribution of ozone in the wastewater and thus ensure the efficiency of sterilization and purification, a transverse movement device 13 is also arranged. Activating the drive motor 22 of the transverse movement device 13 causes the reciprocating screw 18 to rotate. The rotation of the reciprocating screw 18 drives the transverse movement rod 19 to reciprocate along the horizontal bar 17. The reciprocating movement of the transverse movement rod 19, through the vertical bar 20 and the clamp 21, causes the ozone generator 14 to reciprocate in the wastewater, facilitating ozone distribution. Furthermore, the vertical bar 20 also stirs the wastewater during its reciprocating movement, further facilitating the uniform distribution of ozone. After three treatments—sedimentation tank 1, flocculation tank 4, and ozone tank 12—the wastewater meets discharge standards. Opening the second discharge valve 16 allows it to be sent to the circulating water network through the circulating water pipe 15 for reuse.

[0024] In Example 3, based on Example 2, the heavier impurities settling at the bottom of the settling tank 1 can be discharged from the first drain pipe 2928 by opening the first drain valve. The precipitate produced by cyanide in the flocculation tank 4, as well as other precipitates blocked by the circular filter screen 9, can also be discharged with the liquid from the second drain pipe 30 by opening the second drain valve 31. The baffle 23 can shield the crossbar 17 and the reciprocating screw 18 to prevent them from being eroded by the wastewater discharged from the conduit 10 and thus corroded. The outlet end of the discharge pipe 8, the circular filter screen 9, and the inlet end of the conduit 10 are connected by a flange connection, facilitating the disassembly and maintenance of the circular filter screen 9.

Claims

1. A wastewater recycling and treatment device for coal coking production, comprising a settling tank (1), wherein an inlet pipe (2) is fixedly connected to the upper end of the settling tank (1), characterized in that, A settling baffle (3) is fixedly connected to the upper side wall of the settling tank (1). A flocculation tank (4) is integrally arranged on the right side of the settling tank (1). An overflow window (5) communicating with the flocculation tank (4) is opened on the right side wall of the settling tank (1). A square filter screen (6) is embedded in the overflow window (5). A stirring assembly (7) is arranged inside the flocculation tank (4). The inlet end of a discharge pipe (8) is fixedly connected to the bottom of the flocculation tank (4). The outlet end of the discharge pipe (8) abuts against the left end of a circular filter screen (9). The right end of the circular filter screen (9) abuts against the inlet end of a conduit (10). The outlet end of the discharge pipe (8), the circular filter screen (9) and the inlet end of the conduit (10) are connected by a flange connection. A first discharge valve (11) is installed on the conduit (10). An ozone pool (12) is arranged at the outlet end of the conduit (10). A transverse movement device (13) is arranged in the ozone pool (12). The transverse movement device (13) is connected to multiple ozone generators (14) evenly distributed along the longitudinal direction. The bottom of the ozone pool (12) is fixedly connected to the inlet end of the circulating water pipe (15). A second discharge valve (16) is installed at the upper end of the circulating water pipe (15).

2. The wastewater recycling and treatment device in coal coking production according to claim 1, characterized in that, The transverse movement device (13) includes two longitudinally spaced horizontal bars (17) fixedly connected to the inner wall of the ozone pool (12). A reciprocating screw (18) rotatably connected to the inner wall of the ozone pool (12) is arranged between the two horizontal bars (17). The reciprocating screw (18) is threadedly connected to the middle of the transverse movement rod (19). The transverse movement rod (19) is also slidably connected to the two horizontal bars (17). Multiple sets of longitudinally evenly distributed vertical bars (20) are fixedly connected to the lower end of the transverse movement rod (19). Each vertical bar (20) is fixedly connected to the lower end of a clamp (21). The clamp (21) corresponds to and is fixedly connected to the ozone generator (14). A drive motor (22) for driving the reciprocating screw (18) is fixedly connected to the right end of the ozone pool (12).

3. The wastewater recycling and treatment device in coal coking production according to claim 2, characterized in that, The inner wall of the ozone pool (12) is fixedly connected with a shield (23) for shielding the reciprocating screw (18) and the crossbar (17).

4. The wastewater recycling and treatment device in coal coking production according to claim 1, characterized in that, The stirring assembly (7) includes a bracket (24) fixedly connected to the upper end of the flocculation box (4). The bracket (24) is rotatably connected to a stirring shaft (25) arranged coaxially with the flocculation box (4). The stirring shaft (25) is integrally connected to multiple sets of stirring rods (26) evenly distributed vertically. The upper end of the bracket (24) is fixedly connected to a stirring motor (27) for driving the stirring shaft (25).

5. The wastewater recycling and treatment device in coal coking production according to claim 1, characterized in that, The bottom of the settling tank (1) is fixedly connected to a first drain pipe (2928), and a first drain valve is installed on the first drain pipe (2928). The bottom of the flocculation tank (4) is fixedly connected to a second drain pipe (30), and a second drain valve (31) is installed on the second drain pipe (30).

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