Flocculation-Fenton coupled carbon roasting furnace production wastewater treatment system

Abstract

The utility model discloses a flocculation-Fenton coupled carbon roasting furnace production wastewater treatment system which comprises a Fenton reaction box, a partition plate is arranged in the Fenton reaction box, filler areas are arranged on the two sides of the partition plate, and the height of the highest point of the partition plate is located between the top of the Fenton reaction box and the tops of the filler areas. A flocculation precipitation process box is arranged on one side of the Fenton reaction box, a three-way pipe is communicated with one side of the precipitation area, an oil concentration meter is arranged in the middle of the liquid inlet end of the three-way pipe, a water return electric valve is arranged at one end, far away from the Fenton reaction box, of the three-way pipe, and a water inlet electric valve is arranged at the other end of the three-way pipe; the other end of the water inlet electric valve is communicated and connected with the Fenton reaction box through a pipeline, so that oil with too high concentration can be prevented from entering the Fenton reaction box, and the situation that the catalytic efficiency of a catalyst is possibly reduced due to too much oil substances in wastewater is prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of wastewater treatment, in particular to a flocculation-Fenton coupled carbon roasting furnace production wastewater treatment system. Background Art

[0002] Carbon roasting furnace is a kind of equipment used for high temperature processing of carbon materials, which converts raw materials into high-quality carbon products such as graphite electrodes, pre-baked anodes, etc.

[0003] In the actual production process, the roasting furnace will produce wastewater, which is discharged intermittently. It contains highly colored, difficult-to-degrade organic matter and a high oil content. In addition, the presence of benzene rings, double bond groups and polycyclic aromatic hydrocarbons in the wastewater makes the treatment of the wastewater more difficult.

[0004] The commonly used chemical treatment process at present is the Fenton oxidation method, which can effectively remove chromophores and difficult-to-degrade organic matter. However, excessive oil substances in the wastewater may reduce the catalytic efficiency of the catalyst and affect the wastewater treatment results. Utility Model Content

[0005] The utility model aims to provide a flocculation-Fenton coupled carbon roasting furnace production wastewater treatment system to solve the problem in the above background technology that excessive oil substances in wastewater reduce the catalytic efficiency of the catalyst.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a flocculation-Fenton coupled carbon roasting furnace production wastewater treatment system, comprising a Fenton reaction box, a partition is arranged inside the Fenton reaction box, and packing areas are arranged on both sides of the partition, and the height of the highest point of the partition is located between the top of the Fenton reaction box and the top of the packing area. A flocculation sedimentation process box is arranged on one side of the Fenton reaction box, and the flocculation sedimentation process box includes a flocculation zone 1, a flocculation zone 2 and a sedimentation zone. The top of the flocculation zone 1 is provided with a water inlet flange, and the flocculation zone 2 is provided with a water inlet flange. It is arranged at one side of the flocculation zone 1, a water inlet pipe is arranged between the flocculation zone 1 and the flocculation zone 2, a feeding port is arranged at the top of the flocculation zone 2, the sedimentation zone is arranged at one side of the flocculation zone 2, a connecting pipe is arranged between the sedimentation zone and the flocculation zone 2, a tee is connected through one side of the sedimentation zone, an oil concentration meter is arranged in the middle of the liquid inlet end of the tee, a return water electric valve is arranged at one end of the tee away from the Fenton reaction box, and a water inlet electric valve is arranged at the other end, and the other end of the water inlet electric valve is connected to the Fenton reaction box through a pipeline.

[0007] Preferably, a motor is provided on the top of the first flocculation zone and the second flocculation zone, and an output end of the motor is fixedly connected to a stirring rod through the top wall of the flocculation sedimentation process box, and a paddle is provided at the bottom of the stirring rod.

[0008] Preferably, a water inlet central cylinder is provided inside the sedimentation area, and the connecting pipe is connected to the water inlet central cylinder through-through.

[0009] Preferably, the filler area includes an acid filler area and a universal filler area, the acid filler area is arranged on a side of the partition close to the tee, and the universal filler area is arranged on a side of the partition away from the tee.

[0010] Compared with the prior art, the beneficial effects of the utility model are:

[0011] (1) By setting up a flocculation sedimentation process box, the oil substances in the wastewater are pre-treated. When the wastewater reaches the three-way pipe, it is detected by the oil concentration meter. If the oil concentration exceeds the set value, the return water electric valve is opened, and the wastewater returns to the original water pool to wait for re-treatment. If the oil concentration does not exceed the set value, the wastewater enters the Fenton reaction box through the water inlet electric valve, so that the wastewater entering the Fenton reaction box is treated, and the oil concentration is within the range that the catalytic effect of the Fenton reaction box can bear, thereby avoiding excessive oil substances in the wastewater from reducing the catalytic efficiency of the catalyst and ensuring the efficiency of the reaction.

[0012] (2) The traditional Fenton reaction will increase the pH, at which time the oxidizing property of hydroxyl radicals is inhibited and the processing capacity is reduced. The utility model divides the packing area into two parts, and puts the universal packing in the rear part to avoid the reduction of the processing capacity of the Fenton reaction box. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0014] Figure 2 It is a schematic diagram of the internal plane structure of the flocculation sedimentation process box in the utility model;

[0015] Figure 3 This is a schematic diagram of the internal planar structure of the Fenton reaction box in the utility model.

[0016] In the figure: 1. Fenton reaction box; 2. partition; 3. packing area; 31. acid packing area; 32. general packing area; 4. flocculation sedimentation process box; 41. flocculation area 1; 411. water inlet flange; 42. flocculation area 2; 421. feeding port; 43. sedimentation area; 431. water inlet center tube; 44. water inlet pipe; 45. connecting pipe; 46. motor; 47. stirring rod; 48. paddle; 5. three-way pipe; 51. oil concentration meter; 52. return water electric valve; 53. water inlet electric valve. DETAILED DESCRIPTION

[0017] In order to make the purpose, technical scheme and advantages of the embodiment of the utility model clearer, the technical scheme in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, rather than all the embodiments. The components of the embodiment of the utility model generally described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiment of the utility model provided in the drawings is not intended to limit the scope of the utility model for protection, but merely represents the selected embodiment of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work belong to the scope of protection of the utility model.

[0018] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0019] In the description of the present utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings, or the orientation or position relationship in which the utility model product is usually placed when in use, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0020] See also Figure 1 The utility model provides an embodiment: a flocculation-Fenton coupled carbon roasting furnace production wastewater treatment system, comprising a Fenton reaction box 1, a partition 2 is arranged inside the Fenton reaction box 1, and packing areas 3 are arranged on both sides of the partition 2. The height of the highest point of the partition 2 is located between the top of the Fenton reaction box 1 and the top of the packing area 3. The packing area 3 includes an acidic packing area 31 and a universal packing area 32. The acidic packing area 31 is arranged on the side of the partition 2 close to the three-way pipe 5, and the universal packing area 32 is arranged on the side of the partition 2 away from the three-way pipe 5. The wastewater treated by the flocculation sedimentation process box enters the Fenton reaction box 1, and first contacts and mixes with the acidic packing in the acidic packing area 31. When the water level exceeds the height set by the partition 2, the wastewater enters the universal packing area 32 for decomposition treatment.

[0021] A flocculation and sedimentation process box 4 is arranged on one side of the Fenton reaction box 1. The flocculation and sedimentation process box 4 includes 41, a second flocculation zone 42 and a sedimentation zone 43. A water inlet flange 411 is arranged on the top of the first flocculation zone 41. The second flocculation zone 42 is arranged on one side of the first flocculation zone 41. A water inlet pipe 44 is arranged between the first flocculation zone 41 and the second flocculation zone 42. A feeding port 421 is arranged on the top of the second flocculation zone 42. A motor 46 is arranged on the top of the first flocculation zone 41 and the second flocculation zone 42. The output end of the motor 46 passes through the top wall of the flocculation and sedimentation process box 4 and is fixedly connected with a stirring rod 47. The bottom of the stirring rod 47 is provided with a paddle 48. 3 is arranged at one side of the flocculation zone 2 42, a connecting pipe 45 is arranged between the sedimentation zone 43 and the flocculation zone 2 42, a water inlet central cylinder 431 is arranged inside the sedimentation zone 43, the connecting pipe 45 is connected with the water inlet central cylinder 431, the wastewater first enters the flocculation zone 1 41 from the wastewater tank through the water inlet flange 411, is stirred in the flocculation zone 1 41, and enters the flocculation zone 2 42 through the water inlet pipe 44, at the top of the flocculation zone 2 42, the terminal of the water inlet pipe 44 is added with coagulant and coagulant aid, so that the oil substances in the wastewater form flocs of larger particles, the wastewater enters the sedimentation zone through the connecting pipe 45, and finally reaches the tee pipe 5.

[0022] A tee pipe 5 is connected through one side of the sedimentation zone 43, and an oil concentration meter 51 is arranged in the middle of the liquid inlet end of the tee pipe 5. A return water electric valve 52 is arranged at one end of the tee pipe 5 away from the Fenton reaction box 1. The liquid outlet end of the return water electric valve 52 is connected to the raw water tank through a pipeline, and the other end is provided with an inlet water electric valve 53. The other end of the inlet water electric valve 53 is connected to the Fenton reaction box 1 through a pipeline. When the wastewater at the liquid inlet end of the tee pipe 5 is detected by the oil concentration meter 51, it is found that the oil content of the wastewater is higher than the set value. At this time, the return water electric valve 52 is started, and the wastewater returns to the raw water tank for re-treatment; if the measured oil content is lower than the set value and the catalytic effect of the Fenton reaction box 1 is within an acceptable range, the wastewater is allowed to enter the Fenton reaction box 1 by opening the inlet water electric valve 53.

[0023] When the embodiment of the present application is used: first, wastewater is collected in the raw water pool, and the wastewater is pumped into the flocculation zone 1 41 through the pipeline and the water inlet flange 411. After stirring inside the flocculation zone 1 41, the water level gradually rises, and the wastewater enters the flocculation zone 2 42 from the terminal of the water inlet pipe 44. Coagulant and coagulant aid are added at the feeding port 421. After the wastewater is treated in the flocculation zone 2 42, some waste in the wastewater is precipitated after entering the sedimentation zone 43. The wastewater enters the liquid inlet end of the three-way pipe 5 and is detected by the oil concentration meter 51. If the wastewater When the oil content of the water is higher than the set value, the return water electric valve 52 is started, and the wastewater returns to the original water pool for re-treatment; if the measured oil content is lower than the set value and the catalytic effect of the Fenton reaction box 1 is within an acceptable range, the wastewater is allowed to enter the Fenton reaction box 1 by opening the water inlet electric valve 53, and first enters the acid packing area 31 in the Fenton reaction box 1 for strong oxidation treatment to decompose organic matter in the water. After the wastewater level is higher than the partition, it enters the universal packing area 32. After the wastewater treatment is completed, it enters the next level of treatment through the drain pipe.

[0024] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A flocculation-Fenton coupled carbon roasting furnace production wastewater treatment system, comprising a Fenton reaction box (1), characterized in that: The Fenton reaction box (1) is provided with a partition (2) inside, and packing areas (3) are provided on both sides of the partition (2), and the height of the highest point of the partition (2) is located between the top of the Fenton reaction box (1) and the top of the packing area (3). A flocculation sedimentation process box (4) is provided on one side of the Fenton reaction box (1), and the flocculation sedimentation process box (4) includes a flocculation zone 1 (41), a flocculation zone 2 (42) and a sedimentation zone (43). A water inlet flange (411) is provided on the top of the flocculation zone 1 (41), and the flocculation zone 2 (42) is provided on one side of the flocculation zone 1 (41). An inlet flange (411) is provided between the flocculation zone 1 (41) and the flocculation zone 2 (42). A water pipe (44), a feeding port (421) is arranged at the top of the second flocculation zone (42), the sedimentation zone (43) is arranged on one side of the second flocculation zone (42), a connecting pipe (45) is arranged between the sedimentation zone (43) and the second flocculation zone (42), a three-way pipe (5) is connected to one side of the sedimentation zone (43), an oil concentration meter (51) is arranged at the middle of the liquid inlet end of the three-way pipe (5), a return water electric valve (52) is arranged at one end of the three-way pipe (5) away from the Fenton reaction box (1), and a water inlet electric valve (53) is arranged at the other end, and the other end of the water inlet electric valve (53) is connected to the Fenton reaction box (1) through a pipeline.

2. A flocculation-Fenton coupled carbon roasting furnace production wastewater treatment system according to claim 1, characterized in that: A motor (46) is disposed at the top of each of the flocculation zone 1 (41) and the flocculation zone 2 (42). The output end of the motor (46) passes through the top wall of the flocculation process box (4) and is fixedly connected to a stirring rod (47). A paddle (48) is disposed at the bottom of the stirring rod.

3. The flocculation-Fenton coupled carbon roasting furnace production wastewater treatment system according to claim 1, characterized in that: A water inlet central cylinder (431) is provided inside the sedimentation area (43), and the connecting pipe (45) is connected to the water inlet central cylinder (431).

4. A flocculation-Fenton coupled carbon roasting furnace production wastewater treatment system according to claim 1, characterized in that: The packing area (3) comprises an acidic packing area (31) and a universal packing area (32); the acidic packing area (31) is arranged on a side of the partition (2) close to the three-way pipe (5), and the universal packing area (32) is arranged on a side of the partition (2) away from the three-way pipe (5).

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