Left-right separated catalytic ozonation tower for sewage treatment

Abstract

The utility model discloses a left-right separated catalytic ozonation tower for sewage treatment. The left-right separated catalytic ozonation tower comprises a first reaction zone and a second reaction zone, supporting layers are arranged at positions, close to the bottoms, in the first reaction zone and the second reaction zone, and catalyst filling layers are arranged on the supporting layers; the first reaction zone and the second reaction zone are respectively connected with a circulating water system with an ejector; a first circulating water outlet is formed in the position, above the corresponding catalyst filling layer, of the first reaction area, and a first circulating water inlet is formed in the side wall close to the bottom; a second circulating water outlet is formed in the position, above the corresponding catalyst filling layer, of the second reaction zone, and a second circulating water inlet is formed in the side wall close to the bottom of the second reaction zone; each jet device forms negative pressure in the corresponding circulating water system so as to suck ozone, and the ozone and the corresponding circulating sewage are mixed and then reinjected into the first reaction zone or the second reaction zone. The device disclosed by the utility model realizes segmented feeding of ozone and staged treatment of sewage, and has higher treatment efficiency.

Description

Technical Field

[0001] The utility model relates to the technical field of sewage treatment equipment construction, in particular to a left-right separated ozone catalytic oxidation tower for sewage treatment. Background Art

[0002] Industrial wastewater has the characteristics of many types of pollutants, high concentration, high toxicity, complex composition and poor biodegradability. It is one of the most difficult types of wastewater to treat.

[0003] In the existing technology, the main methods for treating this type of wastewater include membrane filtration technology, ozone oxidation technology, photocatalytic oxidation technology, Fenton reagent oxidation technology, conventional micro-electrolysis technology, etc.

[0004] Ozone catalytic oxidation technology, as a type of ozone oxidation technology, is widely used in industrial wastewater treatment (especially deep treatment).

[0005] Industrial wastewater has a relatively small treatment volume, and currently it is mainly treated by catalytic oxidation towers. For many difficult-to-treat industrial wastewaters, in order to further increase the treatment effect, multiple towers are often connected in series to treat the industrial wastewater. Common forms include three towers in series and six towers in series.

[0006] On the one hand, multi-stage series connection is conducive to the segmented addition of ozone, which improves the utilization rate of ozone and enhances the treatment effect;

[0007] On the other hand, different catalysts can be filled in different towers to more specifically treat some special pollutants in industrial wastewater; and other oxidants, such as hydrogen peroxide, can be added in different towers to achieve the combined use of related processes.

[0008] In practical applications, when ozone catalytic oxidation process is used to treat industrial wastewater, multiple ozone catalytic oxidation towers are often connected in series. However, when multiple towers are connected in series, the floor space is relatively large, the construction cost is relatively high, there are also many flow pipes and valves between the towers, and the operation is complicated.

[0009] Therefore, how to achieve efficient treatment of industrial wastewater and reduce the construction cost of sewage treatment equipment has become a technical problem that technical personnel in this field urgently need to solve. Utility Model Content

[0010] In view of the above-mentioned defects of the prior art, the utility model provides a left-right separated ozone catalytic oxidation tower for sewage treatment, the purpose of which is to achieve efficient treatment of industrial wastewater and reduce the construction cost of sewage treatment equipment.

[0011] In order to achieve the above-mentioned purpose, the utility model discloses a left-right separated ozone catalytic oxidation tower for sewage treatment, comprising a cylinder.

[0012] An inner partition extending in a vertical direction is provided in the cylinder along the center line, and the inner cavity is divided into a first reaction zone and a second reaction zone by the inner partition;

[0013] The first reaction zone and the second reaction zone are both reaction zones for ozone catalytic oxidation of wastewater, and a supporting layer is provided near the bottom of each zone, a catalyst filling layer is provided on the supporting layer, and a first water collecting device and a second water collecting device are provided near the top of each zone;

[0014] The outer wall of the first reaction zone near the bottom is provided with a water inlet;

[0015] The second reaction zone is provided with a water outlet near the top;

[0016] A flow guide pipe is provided between the first water collecting device of the first reaction zone and the second reaction zone near the bottom, and the first reaction zone and the second reaction zone are connected through the flow guide pipe;

[0017] The first reaction zone and the second reaction zone are respectively connected to a circulating water system with an ejector;

[0018] The first reaction zone is provided with a first circulating water outlet on the side wall located above the corresponding catalyst filling layer, and a first circulating water inlet on the side wall near the bottom, and is connected to the corresponding circulating water system through the first circulating water outlet and the first circulating water inlet;

[0019] The side wall of the second reaction zone located above the corresponding catalyst filling layer is provided with a second circulating water outlet, and the side wall near the bottom is provided with a second circulating water inlet, and is connected to the corresponding circulating water system through the second circulating water outlet and the second circulating water inlet;

[0020] Each of the ejectors forms negative pressure in the corresponding circulating water system to absorb ozone, and then mixes the ozone with the corresponding circulating sewage and injects it back into the first reaction zone or the second reaction zone.

[0021] Preferably, the cylinder is cylindrical; the inner partition divides the cylinder into two semi-cylindrical shapes.

[0022] Preferably, the two catalyst filling layers in the first reaction zone and the second reaction zone are filled with different catalysts.

[0023] Preferably, the first reaction zone is provided with a first clean water inlet near the bottom and a first clean water outlet near the top, and clean water is input from the first clean water inlet and then output from the first clean water outlet to flush the first reaction zone and remove the trapped particles and suspended matter;

[0024] The second reaction zone is provided with a second clean water inlet near the bottom and a second clean water outlet near the top. Clean water is input from the second clean water inlet and output from the second clean water outlet to flush the second reaction zone and remove trapped particulate matter and suspended matter.

[0025] Preferably, a first backwash air inlet is provided near the bottom of the first reaction zone, and the particulate matter and suspended matter trapped in the support layer and the catalyst filling layer inside the first reaction zone are flushed by the pressurized air flow input from the first backwash air inlet;

[0026] A second backwash air inlet is provided near the bottom of the second reaction zone, and the particulate matter and suspended matter trapped in the supporting layer and the catalyst filling layer inside the second reaction zone are flushed by the pressurized air flow input from the second backwash air inlet.

[0027] Preferably, the first reaction zone and the second reaction zone are respectively provided with a first vent and a second vent near the bottom, and the internal sewage can be emptied by opening the corresponding first vent or the corresponding second vent.

[0028] Preferably, the first reaction zone and the second reaction zone are respectively provided with a first unloading port and a second unloading port near the upper position of the corresponding supporting layer, and the filling material of the corresponding supporting layer and the corresponding catalyst filling layer can be unloaded by opening the corresponding first unloading port or the corresponding second unloading port.

[0029] Preferably, the first reaction zone is provided with a first lower inspection opening on the side wall near the bottom, and a first upper inspection opening on the side wall near the top;

[0030] The second reaction zone is provided with a second lower inspection opening on the side wall near the bottom, and a second upper inspection opening on the side wall near the top;

[0031] The top of the cylinder is provided with a top inspection port connecting the first reaction zone and the second reaction zone;

[0032] A user can enter the corresponding area inside the cylinder through the first lower inspection port, the first upper inspection port, the second lower inspection port, the second upper inspection port or the top inspection port.

[0033] Preferably, a breathing valve is provided on the top of the cylinder.

[0034] Preferably, an exhaust port is provided on the top of the cylinder, and an exhaust gas destruction device is connected through the exhaust port;

[0035] The tail gas destruction device is used to destroy the unreacted ozone-containing gas.

[0036] Beneficial effects of the utility model:

[0037] The utility model realizes segmented ozone addition and graded sewage treatment, and two-stage reaction zones can be filled with different catalysts to further improve the treatment effect, thus having higher treatment efficiency.

[0038] The concept, specific structure and technical effects of the present invention will be further described below in conjunction with the accompanying drawings to fully understand the purpose, characteristics and effects of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 A schematic diagram of the longitudinal cross-section structure of an embodiment of the utility model is shown.

[0040] Figure 2 A schematic structural diagram of one side of the first reaction zone in one embodiment of the utility model is shown.

[0041] Figure 3 A schematic structural diagram of one side of the second reaction zone in one embodiment of the utility model is shown.

[0042] Figure 4 A schematic structural diagram of the top of an embodiment of the utility model is shown. DETAILED DESCRIPTION

[0043] Example

[0044] like Figures 1 to 4 As shown, a left-right separated ozone catalytic oxidation tower for sewage treatment includes a cylinder a.

[0045] An inner partition b extending in the vertical direction is provided along the center line of the cylinder a, and the inner cavity is divided into a first reaction zone and a second reaction zone by the inner partition b;

[0046] The first reaction zone and the second reaction zone are both reaction zones for ozone catalytic oxidation of wastewater, and a supporting layer c is provided near the bottom of each zone, a catalyst filling layer d is provided on the supporting layer c, and a first water collecting device e and a second water collecting device g are provided near the top of each zone;

[0047] A water inlet N1 is provided on the outer wall of the first reaction zone near the bottom;

[0048] The second reaction zone is provided with a water outlet N2 near the top;

[0049] A flow guide pipe f is provided between the first water collecting device e of the first reaction zone and the second reaction zone near the bottom, and the first reaction zone and the second reaction zone are connected through the flow guide pipe f;

[0050] The first reaction zone and the second reaction zone are respectively connected to a circulating water system with an ejector;

[0051] The first reaction zone is provided with a first circulating water outlet N9 on the side wall above the corresponding catalyst filling layer d, and a first circulating water inlet N10 is provided on the side wall near the bottom, and is connected to the corresponding circulating water system through the first circulating water outlet N9 and the first circulating water inlet N10;

[0052] The second reaction zone is provided with a second circulating water outlet N11 on the side wall above the corresponding catalyst filling layer d, and a second circulating water inlet N12 is provided on the side wall near the bottom, and is connected to the corresponding circulating water system through the second circulating water outlet N11 and the second circulating water inlet N12;

[0053] Each ejector forms negative pressure in the corresponding circulating water system to absorb ozone, and then mixes the ozone with the corresponding circulating sewage and injects it back into the first reaction zone or the second reaction zone.

[0054] The first reaction zone and the second reaction zone of the utility model both form negative pressure through the ejector in the corresponding circulating water system to suck in and mix ozone with the corresponding circulating sewage and then inject it back to form a "jet" to add ozone.

[0055] The utility model divides the cylinder body by the inner partition plate b to form a two-stage reaction zone, realizes the segmented addition of ozone and the graded treatment of sewage, and the sewage passes through the first reaction zone and enters the second reaction zone to realize the graded treatment and improve the treatment efficiency.

[0056] During specific implementation: sewage enters the first reaction zone from the water inlet N1;

[0057] In the first reaction zone, the sewage enters the corresponding circulating water system from the first circulating water outlet N9, then passes through the corresponding ejector to be mixed with ozone, and then returns to the first reaction zone from the first circulating water inlet N10; in this process, the ejector simultaneously inhales ozone gas, and after the sewage mixed with ozone returns to the first reaction zone from the first circulating water inlet N10, it flows through the supporting layer c and the catalyst filling layer d in turn, contacts with the catalyst in the catalyst filling layer d, and undergoes a catalytic degradation reaction, and as the cycle continues, ozone is continuously dissolved and reacts.

[0058] The wastewater after the reaction in the first reaction zone passes through the draft pipe f and enters the bottom of the second reaction zone;

[0059] In the left reaction zone, the sewage enters the corresponding circulating water system from the second circulating water outlet N11, then passes through the corresponding ejector to be mixed with ozone, and then returns to the second reaction zone from the second circulating water inlet N12; in this process, the ejector simultaneously inhales ozone gas, and after the sewage mixed with ozone returns to the second reaction zone from the second circulating water inlet N12, it flows through the supporting layer c and the catalyst filling layer d in turn, and comes into contact with the catalyst in the catalyst filling layer d, causing a catalytic degradation reaction. As the cycle continues, ozone is continuously dissolved and reacts, and the wastewater after the reaction flows out from the outlet N2 and enters the subsequent system unit.

[0060] The sewage enters the first reaction zone through the water inlet N1, then passes through the supporting layer c and the catalyst filling layer d, and is finally collected by the water collecting device e and introduced into the second reaction zone by the guide pipe f. The sewage enters and exits the first reaction zone and the second reaction zone in a "bottom-in and top-out" manner, which is beneficial for the sewage mixed with ozone to flow through the catalyst in sequence, achieve full contact with the catalyst, and realize the catalytic effect; in addition, bottom-in and top-out are beneficial to full mixing, reduce short-flow, and are easy to operate and control.

[0061] After the final sewage is treated, it enters the subsequent treatment unit. The first reaction zone and the second reaction zone are two independent reaction zones.

[0062] In some embodiments, the cylinder a is cylindrical; the inner partition b divides the cylinder a into two semi-cylindrical shapes.

[0063] In certain embodiments, the two catalyst filling layers d of the first reaction zone and the second reaction zone are filled with different catalysts.

[0064] The two catalyst filling layers d of the first reaction zone and the second reaction zone are filled with different catalysts, which can further improve the treatment effect and thus have a higher treatment efficiency.

[0065] In some embodiments, the first reaction zone is provided with a first clean water inlet N3 near the bottom and a first clean water outlet N4 near the top, and clean water is input from the first clean water inlet N3 and then output from the first clean water outlet N4 to flush the first reaction zone and remove the trapped particles and suspended matter;

[0066] A second clean water inlet N5 is provided near the bottom of the second reaction zone, and a second clean water outlet N6 is provided near the top. Clean water is input from the second clean water inlet N5 and output from the second clean water outlet N6 to flush the second reaction zone and remove trapped particulate matter and suspended matter.

[0067] In some embodiments, a first backwash air inlet N7 is provided near the bottom of the first reaction zone, and the particulate matter and suspended matter trapped in the support layer c and the catalyst filling layer d inside the first reaction zone are flushed by the pressurized air flow input from the first backwash air inlet N7;

[0068] A second backwash air inlet N8 is provided near the bottom of the second reaction zone, and the particulate matter and suspended matter trapped in the supporting layer c and the catalyst filling layer d inside the second reaction zone are flushed by the pressurized air flow input from the second backwash air inlet N8.

[0069] In practical applications, the utility model performs "air backwashing" and "water backwashing" to prevent possible blockage caused by suspended matter, thereby avoiding blockage.

[0070] In certain embodiments, the first reaction zone and the second reaction zone are respectively provided with a first vent N15 and a second vent N16 near the bottom, and the internal sewage can be emptied by opening the corresponding first vent N15 or the corresponding second vent N16.

[0071] In some embodiments, the first reaction zone and the second reaction zone are respectively provided with a first unloading port N17 and a second unloading port N18 near the upper position of the corresponding supporting layer c. The filling material of the corresponding supporting layer c and the corresponding catalyst filling layer d can be unloaded by opening the corresponding first unloading port N17 or the corresponding second unloading port N18.

[0072] In certain embodiments, a first lower inspection port N19 is provided on the side wall of the first reaction zone near the bottom, and a first upper inspection port N20 is provided on the side wall near the top;

[0073] A second lower inspection port N21 is provided on the side wall near the bottom of the second reaction zone, and a second upper inspection port N22 is provided on the side wall near the top;

[0074] The top of the cylinder a is provided with a top inspection port N23 connecting the first reaction zone and the second reaction zone;

[0075] The user can enter the corresponding area inside the cylinder a through the first lower inspection port N19, the first upper inspection port N20, the second lower inspection port N21, the second upper inspection port N22 or the top inspection port N23.

[0076] The first lower inspection port N19, the first upper inspection port N20, the second lower inspection port N21, the second upper inspection port N22 and the top inspection port N23 enable easy access to the cylinder a for equipment maintenance.

[0077] In some embodiments, a breathing valve N13 is provided at the top of the cylinder a.

[0078] The breathing valve N13 ensures that the pressure inside the container does not become too high.

[0079] In some embodiments, an exhaust port N14 is provided at the top of the cylinder a, and the exhaust gas destruction device is connected through the exhaust port N14;

[0080] The tail gas destruction device is used to destroy the unreacted ozone-containing gas.

[0081] The preferred specific embodiments of the utility model are described in detail above. It should be understood that ordinary technicians in this field can make many modifications and changes based on the concept of the utility model without creative work. Therefore, all technical solutions that can be obtained by technicians in this technical field based on the concept of the utility model through logical analysis, reasoning or limited experiments on the basis of the existing technology should be within the scope of protection determined by the claims.

Claims

1. A left-right partitioned ozone catalytic oxidation tower for sewage treatment, comprising a cylinder (a); characterized in that: An inner partition (b) extending in a vertical direction is provided along the center line of the cylinder (a), and the inner cavity is divided into a first reaction zone and a second reaction zone by the inner partition (b); The first reaction zone and the second reaction zone are both reaction zones for ozone catalytic oxidation of wastewater, and a supporting layer (c) is provided near the bottom of each zone, a catalyst filling layer (d) is provided on the supporting layer (c), and a first water collecting device (e) and a second water collecting device (g) are provided near the top of each zone; A water inlet (N1) is provided on the outer side wall of the first reaction zone near the bottom; A water outlet (N2) is provided near the top of the second reaction zone; A flow guide pipe (f) is provided between the first water collecting device (e) of the first reaction zone and the second reaction zone near the bottom, and the first reaction zone and the second reaction zone are connected through the flow guide pipe (f); The first reaction zone and the second reaction zone are respectively connected to a circulating water system with an ejector; The first reaction zone is provided with a first circulating water outlet (N9) on the side wall above the corresponding catalyst filling layer (d), and a first circulating water inlet (N10) on the side wall near the bottom, and is connected to the corresponding circulating water system through the first circulating water outlet (N9) and the first circulating water inlet (N10); The second reaction zone is provided with a second circulating water outlet (N11) on the side wall located above the corresponding catalyst filling layer (d), and a second circulating water inlet (N12) is provided on the side wall near the bottom, and is connected to the corresponding circulating water system through the second circulating water outlet (N11) and the second circulating water inlet (N12); Each of the ejectors forms negative pressure in the corresponding circulating water system to absorb ozone, and then mixes the ozone with the corresponding circulating sewage and injects it back into the first reaction zone or the second reaction zone.

2. The left-right separated ozone catalytic oxidation tower for sewage treatment according to claim 1 is characterized in that: The cylinder (a) is cylindrical; the inner partition (b) divides the cylinder (a) into two semi-cylindrical shapes.

3. The left-right separated ozone catalytic oxidation tower for sewage treatment according to claim 1, characterized in that: The two catalyst-filled layers (d) of the first reaction zone and the second reaction zone are filled with different catalysts.

4. The left-right separated ozone catalytic oxidation tower for sewage treatment according to claim 1, characterized in that: The first reaction zone is provided with a first clean water inlet (N3) near the bottom and a first clean water outlet (N4) near the top. Clean water is input from the first clean water inlet (N3) and then output from the first clean water outlet (N4) to flush the first reaction zone and remove trapped particles and suspended matter. The second reaction zone is provided with a second clean water inlet (N5) near the bottom, and a second clean water outlet (N6) near the top. Clean water is input from the second clean water inlet (N5) and then output from the second clean water outlet (N6) to flush the second reaction zone and remove trapped particulate matter and suspended matter.

5. The left-right separated ozone catalytic oxidation tower for sewage treatment according to claim 1, characterized in that: A first backwash air inlet (N7) is provided near the bottom of the first reaction zone, and the particulate matter and suspended matter trapped in the support layer (c) and the catalyst filling layer (d) inside the first reaction zone are flushed by the pressurized air flow input from the first backwash air inlet (N7); A second backwash air inlet (N8) is provided near the bottom of the second reaction zone, and the particulate matter and suspended matter trapped in the supporting layer (c) and the catalyst filling layer (d) inside the second reaction zone are flushed by the pressurized air flow input from the second backwash air inlet (N8).

6. The left-right separated ozone catalytic oxidation tower for sewage treatment according to claim 1, characterized in that: The first reaction zone and the second reaction zone are respectively provided with a first vent (N15) and a second vent (N16) near the bottom, and the internal sewage can be emptied by opening the corresponding first vent (N15) or the corresponding second vent (N16).

7. The left-right separated ozone catalytic oxidation tower for sewage treatment according to claim 1, characterized in that: The first reaction zone and the second reaction zone are respectively provided with a first unloading port (N17) and a second unloading port (N18) near the upper position of the corresponding supporting layer (c). The filling material of the corresponding supporting layer (c) and the corresponding catalyst filling layer (d) can be unloaded by opening the corresponding first unloading port (N17) or the corresponding second unloading port (N18).

8. The left-right separated ozone catalytic oxidation tower for sewage treatment according to claim 1, characterized in that: A first lower inspection port (N19) is provided on the side wall of the first reaction zone near the bottom, and a first upper inspection port (N20) is provided on the side wall near the top; The second reaction zone is provided with a second lower inspection port (N21) on the side wall near the bottom, and a second upper inspection port (N22) on the side wall near the top; The top of the cylinder (a) is provided with a top inspection port (N23) connecting the first reaction zone and the second reaction zone; A user can enter the corresponding area inside the cylinder (a) through the first lower inspection port (N19), the first upper inspection port (N20), the second lower inspection port (N21), the second upper inspection port (N22) or the top inspection port (N23).

9. The left-right separated ozone catalytic oxidation tower for sewage treatment according to claim 1, characterized in that: A breathing valve (N13) is provided on the top of the cylinder (a).

10. The left-right separated ozone catalytic oxidation tower for sewage treatment according to claim 1, characterized in that: The top of the cylinder (a) is provided with an exhaust port (N14), and the exhaust gas destruction device is connected through the exhaust port (N14); The tail gas destruction device is used to destroy the unreacted ozone-containing gas.

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