Industrial wastewater treatment device

Abstract

The utility model discloses an industrial wastewater treatment device which comprises an enrichment tank and a solid-liquid separation tank which are integrally formed, an oxidation tank is arranged in the solid-liquid separation tank, an oxidizing agent adding pipe is arranged at the top of the oxidation tank, an ultraviolet lamp is arranged above a water outlet pipe in the oxidation tank, a supporting layer is arranged at the lower end of the water outlet pipe, and a water outlet pipe is arranged in the oxidation tank. A catalyst layer is arranged above the supporting layer, and the supporting layer and the catalyst layer are respectively paved on the corresponding cross sections of the oxidation tank. According to the utility model, the oxidizing agent adding mode is changed in the oxidation tank, and the ultraviolet lamp and the catalyst layer are additionally arranged, so that the organic wastewater is treated under the ultraviolet catalytic oxidation condition, the removal efficiency of organic matters is higher, the problem that an oxidizing agent releaser is easy to block is avoided, frequent backwashing is not needed, and the operation stability is good.

Description

Technical Field

[0001] This utility model relates to the field of wastewater treatment technology, specifically to an industrial wastewater treatment device. Background Technology

[0002] Industrial park wastewater refers to industrial wastewater generated by various enterprises within the industrial park during their production processes, as well as comprehensive wastewater formed by the mixture of domestic sewage and rainwater within the park. Due to the diverse types of enterprises within the park and the complex composition of the wastewater, including heavy metal complexes, recalcitrant organic matter, and compound pollutants formed by heavy metals and organic matter, it is difficult to treat and can cause serious harm to the environment and human health if not treated properly.

[0003] CN115849493A discloses an integrated adsorption / oxidation device for treating recalcitrant industrial wastewater organic matter. This device integrates adsorption and oxidation devices into one unit, making wastewater treatment more convenient and efficient. The organic matter content in the treated wastewater is significantly reduced, resulting in good industrial wastewater treatment effect. However, the device has the following problems: (1) It adopts a traditional stirring paddle design, which has a serious short-flow phenomenon. The adsorbent and wastewater are difficult to mix fully, resulting in low adsorbent utilization rate. The adsorbent needs to be replenished frequently, increasing costs. In addition, the organic matter is not fully adsorbed, which is not conducive to the subsequent oxidation and degradation reaction, resulting in a decrease in the removal efficiency of organic matter. (2) The device only adds oxidant through the setting of an oxidant release device for oxidation reaction. The structure is relatively simple and not conducive to the full oxidation and removal of organic matter. In addition, the oxidant release device is prone to clogging, requiring frequent backwashing. The equipment is frequently shut down for maintenance, resulting in poor operational stability. (3) There is no path for unsaturated adsorbent recovery. Direct discharge causes resource waste, resulting in high operating costs and high pressure for solid waste disposal. Utility Model Content

[0004] In view of the above-mentioned shortcomings of the existing technology, the purpose of this utility model is to provide an industrial wastewater treatment device, which solves the problems of the single structure of the oxidation unit of the existing sewage treatment device, which is not conducive to the full removal of organic matter, and the problems of easy pipe blockage, frequent backwashing, frequent equipment shutdown for maintenance, and poor operational stability.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0006] An industrial wastewater treatment device includes an integrally formed enrichment tank and a solid-liquid separation tank. The enrichment tank is internally divided into a premixing zone and an adsorption zone by a vertically arranged partition. The premixing zone and the adsorption zone are connected by a gap reserved below the partition. The premixing zone is connected to an inlet pipe through an opening in its side wall. Both the premixing zone and the adsorption zone are equipped with stirring paddles. An adsorbent dosing pipe is provided at the top of the premixing zone. An oxidation tank is located inside the solid-liquid separation tank, and the bottom of the oxidation tank is connected to the solid-liquid mixture. The inner cavities of the separation tanks are interconnected; the adsorption zone is connected to the oxidation tank via a first water outlet pipe located on the upper side wall of the adsorption zone; a second water outlet pipe is located on the side wall of the solid-liquid separation tank, and the height of the water outlet at the bottom of the oxidation tank is lower than the height of the second water outlet pipe; an oxidant dosing pipe is located at the top of the oxidation tank, an ultraviolet lamp is located above the first water outlet pipe inside the oxidation tank, a support layer is located at the lower end, and a catalyst is located above the support layer to form a catalyst layer. The support layer and the catalyst layer respectively cover the corresponding cross-section of the oxidation tank.

[0007] Furthermore, the stirring blades of the same stirring paddle include several layers of stirring blades arranged vertically at intervals.

[0008] Furthermore, the plane of the stirring blade in the adsorption zone is at an angle of 15 to 45 degrees to the horizontal plane.

[0009] Furthermore, a pH probe is installed in the premixing zone.

[0010] Furthermore, the bottom of the enrichment tank is an inverted cone shape, and the outlet at the bottom constitutes the adsorbent outlet of the adsorption zone. A valve is provided on the adsorbent outlet, and the adsorbent outlet is connected to the adsorbent dosing pipe through a recovery pipe. A valve and a recovery pump are provided on the recovery pipe.

[0011] Furthermore, an inspection port is provided on the top of the oxidation tank.

[0012] Furthermore, the ultraviolet lamp includes several ultraviolet lamp tubes arranged at horizontal intervals.

[0013] Furthermore, all ultraviolet lamps are snapped and fixed to a rectangular stainless steel frame, which is then bolted to the oxidation tank.

[0014] Furthermore, the supporting layer is fixed by a stainless steel mesh welded to the lower end of the oxidation tank.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. The industrial wastewater treatment device provided by this utility model, by changing the oxidant addition method in the oxidation tank and adding ultraviolet lamps and catalyst layers, realizes the treatment of organic wastewater under ultraviolet photocatalytic oxidation conditions. The removal efficiency of organic matter is high, and there is no problem of easy clogging of the oxidant release device. It does not require frequent backwashing and has good operational stability.

[0017] 2. This utility model improves the mixing efficiency of adsorbent and wastewater by modifying the traditional single-layer stirring paddle design to a multi-layer stirring paddle, thereby achieving effective enrichment of organic matter and enhancing the efficiency of subsequent oxidative degradation to remove organic matter. At the same time, it also improves the utilization rate of adsorbent, avoiding frequent replenishment of adsorbent and increasing costs.

[0018] 3. By setting up an adsorbent recovery pipeline, this utility model realizes the recycling of unsaturated adsorbent, improves the adsorbent utilization rate, reduces operating costs, and reduces the pressure of solid waste disposal. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the industrial wastewater treatment device of this utility model.

[0020] In the diagram, the components are: 1. Enrichment tank; 2. Solid-liquid separation tank; 3. Baffle plate; 4. Premixing zone; 5. Adsorption zone; 6. Inlet pipe; 7. Stirring paddle; 8. Adsorbent dosing pipe; 9. Oxidation tank; 10. First outlet pipe; 11. Second outlet pipe; 12. Oxidant dosing pipe; 13. Ultraviolet lamp; 14. Support layer; 15. Catalyst layer; 16. pH probe; 17. Adsorbent outlet; 18. Recovery pipe; 19. Recovery pump; 20. Solid discharge outlet. Detailed Implementation

[0021] The present invention will be further described below with reference to the embodiments. Example

[0022] This utility model provides an industrial wastewater treatment device, including an integrally formed enrichment tank 1 and a solid-liquid separation tank 2. The interior of the enrichment tank 1 is divided into a premixing zone 4 and an adsorption zone 5 by a vertically arranged partition 3. The premixing zone 4 and the adsorption zone 5 are connected by a gap reserved below the partition 3. The premixing zone 4 is connected to a water inlet pipe 6 through an opening on its side wall. Both the premixing zone 4 and the adsorption zone 5 are equipped with stirring paddles 7. An adsorbent dosing pipe 8 is provided at the top of the premixing zone 4. An oxidation tank 9 is provided inside the solid-liquid separation tank 2. The bottom of the oxidation tank 9 is connected to the solid-liquid separation tank 2. The solid-liquid separation tank 2 is connected to the inner cavity of the oxidation tank 9 through a first water outlet pipe 10 provided on the upper side wall of the enrichment tank 1; a second water outlet pipe 11 is provided on the side wall of the solid-liquid separation tank 2, and the height of the water outlet at the bottom of the oxidation tank 9 is lower than the height of the second water outlet pipe 11; an oxidant dosing pipe 12 is provided on the top of the oxidation tank 9, an ultraviolet lamp 13 is provided above the first water outlet pipe 10 inside the oxidation tank 9, and a support layer 14 is provided at the lower end. A catalyst is provided above the support layer 14 to form a catalyst layer 15. The support layer 14 and the catalyst layer 15 respectively cover the corresponding cross-section of the oxidation tank 9.

[0023] In practice, the stirring blades of the same stirring paddle include a double layer of vertically spaced stirring blades. This enhances the stirring effect, allowing the adsorbent and organic wastewater to mix thoroughly, and enabling the adsorbent to fully adsorb organic matter, achieving effective enrichment of organic matter and enhancing the efficiency of subsequent oxidative degradation and removal of organic matter. At the same time, it can also improve the utilization rate of the adsorbent, avoiding frequent replenishment of the adsorbent and increasing costs.

[0024] In practice, the plane of the stirring blade in adsorption zone 5 is at an angle of 15 to 45 degrees to the horizontal plane. This allows the liquid to flow upwards, further enhancing the solid-liquid mixing effect.

[0025] In practice, a pH probe 16 is installed in the premixing zone 4. This allows for the detection of the pH value of the organic wastewater in the premixing zone 4, and the addition of pH adjusting reagents as needed for water treatment to adjust the pH value of the organic wastewater, making it more conducive to oxidation and degradation.

[0026] In specific implementation, the bottom of the enrichment tank 1 is an inverted cone shape, and its bottom outlet constitutes the adsorbent outlet 17 of the adsorption zone 5. A valve is installed on the adsorbent outlet 17, which is connected to the adsorbent dosing pipe 8 via a recovery pipe 18. A valve and a recovery pump 19 are installed on the recovery pipe 18. This allows for the recycling of the adsorbent, improving its utilization rate and reducing costs.

[0027] In practice, an inspection port is provided on the top of the oxidation tank 9. This facilitates the maintenance of the equipment in the oxidation tank 9.

[0028] In practice, the ultraviolet lamp 13 comprises several ultraviolet lamp tubes arranged at horizontal intervals. This allows the ultraviolet lamp 13 to have a larger radiation range and more uniform radiation, thereby improving the catalytic oxidation efficiency.

[0029] In practice, all ultraviolet lamps are snapped and fixed to a rectangular stainless steel frame, which is then bolted to the oxidation tank 9. This allows the ultraviolet lamp 13 to be removed for repair or replacement via the inspection port at the top of the oxidation tank 9 when it malfunctions.

[0030] In practice, the supporting layer 14 is fixed by a stainless steel mesh welded to the lower end of the oxidation tank 9. This fixing method is simple, easy to implement, and readily applicable.

[0031] In specific implementation, the material of the support layer 14 is porous ceramic filter media.

[0032] In specific implementation, the solid-liquid separation tank 2 is provided with a solid discharge port 20 at the bottom, and a valve is provided on the solid discharge port 20. This facilitates the cleaning of the settled solids in the solid-liquid separation tank 2, and the cleaned solids can be further added to the adsorbent dosing pipe 8 for recycling, thereby improving the adsorbent utilization rate.

[0033] Working Principle: During industrial wastewater treatment, wastewater first enters the premixing zone 4 through the inlet pipe 6. Simultaneously, adsorbent is added to the premixing zone 4 through the adsorbent dosing pipe 8. The wastewater and adsorbent are stirred by the agitator 7 to ensure thorough mixing. The pH value of the wastewater is detected by the pH probe 16. If the pH value is not suitable, a pH adjuster is added through the adsorbent dosing pipe 8 to meet the conditions for subsequent oxidation treatment. After mixing in the premixing zone, the wastewater flows into the adsorption zone 5 through the gap below the baffle 3. In the adsorption zone 5, the adsorbent fully adsorbs the organic matter. The agitator 7 generates a swirling flow, further ensuring thorough mixing of the wastewater and adsorbent and improving adsorption efficiency. The premixing zone 4 and adsorption zone 5 are separated to prevent short-circuiting and to avoid the adsorbent flowing out of the first outlet pipe 10 before complete adsorption, which would reduce adsorbent utilization and affect the enrichment of organic matter. After the adsorbent fully adsorbs the organic matter, the wastewater flows into the oxidation tank 9 through the first outlet pipe 10. Under ultraviolet light irradiation and the catalytic action of the catalyst layer 15, the organic matter undergoes a catalytic oxidation reaction, thereby achieving effective removal of organic matter. Compared with existing devices that only add oxidant, this invention can improve the removal efficiency of organic matter, and there is no problem of clogging the oxidant release device. It does not require frequent backwashing, and the device has good operational stability. The wastewater after catalytic oxidation flows through the support layer 14, which can further filter and improve the quality of the effluent. After flowing out of the oxidation tank 9, the wastewater flows into the solid-liquid separation tank 2. The liquid flows out from the second outlet pipe 11 and gradually settles at the bottom of the solid-liquid separation tank 2, and can be discharged through the solid discharge port 20 at the bottom.

[0034] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and not to limit the technical solutions. Those skilled in the art should understand that any modifications or equivalent substitutions to the technical solutions of this utility model that do not depart from the spirit and scope of this technical solution should be covered within the scope of the claims of this utility model.

Claims

1. An industrial wastewater treatment device, comprising an integrally formed enrichment tank and a solid-liquid separation tank, wherein the interior of the enrichment tank is divided into a premixing zone and an adsorption zone by a vertically arranged partition, the premixing zone and the adsorption zone being connected by a gap reserved below the partition; the premixing zone is connected to an inlet pipe through an opening on its side wall, and both the premixing zone and the adsorption zone are equipped with stirring paddles, and an adsorbent dosing pipe is provided at the top of the premixing zone; an oxidation tank is provided inside the solid-liquid separation tank, the bottom of the oxidation tank being connected to the inner cavity of the solid-liquid separation tank; the adsorption zone is connected to the oxidation tank through a first outlet pipe provided on the upper side wall of the adsorption zone; a second outlet pipe is provided on the side wall of the solid-liquid separation tank, and the height of the outlet at the bottom of the oxidation tank is lower than the height of the second outlet pipe; characterized in that, The oxidation tank is equipped with an oxidant dosing pipe at the top, an ultraviolet lamp is installed above the first water outlet pipe inside the oxidation tank, and a support layer is installed at the bottom. A catalyst is installed above the support layer to form a catalyst layer. The support layer and the catalyst layer respectively cover the corresponding cross-section of the oxidation tank.

2. The industrial wastewater treatment device according to claim 1, wherein The agitator blades of the same impeller consist of several layers of agitator blades arranged vertically at intervals.

3. The industrial wastewater treatment device according to claim 2, wherein The plane of the stirring blade in the adsorption zone is at an angle of 15 to 45 degrees to the horizontal plane.

4. The industrial wastewater treatment device according to claim 1, characterized in that, A pH probe is installed in the premixing zone.

5. The industrial wastewater treatment device according to claim 1, wherein The bottom of the enrichment tank is an inverted cone shape, and the outlet at the bottom constitutes the adsorbent outlet of the adsorption zone. A valve is installed on the adsorbent outlet, and the adsorbent outlet is connected to the adsorbent dosing pipe through a recovery pipe. A valve and a recovery pump are installed on the recovery pipe.

6. The industrial wastewater treatment device of claim 1, wherein The oxidation tank is equipped with an inspection port on its top.

7. The industrial wastewater treatment device according to claim 6, characterized in that, The ultraviolet lamp comprises several ultraviolet lamp tubes arranged at horizontal intervals.

8. The industrial wastewater treatment device of claim 7, wherein, All ultraviolet lamps are snapped and fixed to a rectangular stainless steel frame, which is bolted to the oxidation tank.

9. The industrial wastewater treatment device of claim 1, wherein, The support layer is fixed by a stainless steel mesh welded to the lower end of the oxidation tank.

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