Integrated box cabinet system for removing COD of refractory industrial wastewater

Abstract

The application discloses a kind of refractory industrial wastewater COD removal integrated cabinet system, it is related to wastewater treatment technical field, including cabinet, one side in cabinet is equipped with instrument area, the other side is equipped with multiple independent water treatment cabin, equipment area and reaction zone are equipped in each water treatment cabin;The end of cabinet is equipped with ozone preparation area, filler layer is equipped in reaction zone, backwashing area is equipped below filler layer, water inlet pipe, sewage pump, and jet aeration device connected with sewage pump are equipped in each water treatment cabin, sewage pump in upper stage water treatment cabin is connected with water inlet pipe of lower stage water treatment cabin, and multiple water treatment cabins constitute multistage structure ozone oxidation reaction system, ozone gas supply pipe is connected on jet aeration device, and water flow discharge end of jet aeration device is connected with filler tray.The application significantly improves ozone mass transfer efficiency, effectively improves ozone utilization rate, multiple circulation, improves gas mass transfer coefficient, improves catalytic efficiency, and reduces cost.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of wastewater treatment, and particularly relates to a COD removal integrated cabinet system for refractory industrial wastewater. BACKGROUND

[0002] Ozone is a clean and efficient oxidant, and is also suitable for advanced treatment of tail water. Ozone can oxidize organic matter through two ways, namely direct reaction and indirect reaction. The direct reaction refers to the reaction between ozone and organic matter, and the indirect reaction refers to the reaction between ·OH generated by ozone decomposition and organic matter. Compared with Fenton oxidation, ozone oxidation does not produce sludge and has no strict requirement on pH. However, ozone preparation has high cost, and the treatment effect is poor at low dosage and in a short time. In addition, the conventional ozone oxidation reactor has many problems such as gas-liquid distribution and gas-liquid mass transfer, which leads to low ozone utilization rate, large ozone dosage and high operation cost of the conventional ozone oxidation process. Therefore, the application designs and proposes a COD removal integrated cabinet system for refractory industrial wastewater. SUMMARY

[0003] The application aims to solve the problems of low ozone utilization rate, large ozone dosage and high operation cost of the ozone oxidation process in the prior art, and proposes a COD removal integrated cabinet system for refractory industrial wastewater.

[0004] In order to achieve the above-mentioned purpose, the application adopts the following technical scheme:

[0005] The application designs a COD removal integrated cabinet system for refractory industrial wastewater, which comprises a cabinet body. An instrument area is arranged on one side of the cabinet body in the width direction. The other side is divided into a plurality of independent water treatment cabins along the length direction of the cabinet body by a first partition plate. An equipment area and a reaction area are arranged in each water treatment cabin. An ozone preparation area is arranged at one end of the cabinet body. An ozone generator is arranged in the ozone preparation area. The ozone generator is connected with an ozone gas supply pipe. The ozone gas supply pipe is arranged in the instrument area. A filler layer is arranged in the reaction area. A backwashing area is arranged below the filler layer. A filler tray is fixed between the backwashing area and the filler layer. The filler tray is a hollow structure. The top of the filler tray is provided with an opening. A water inlet pipe, a sewage submersible pump, and a jet aeration device connected with the sewage submersible pump are arranged in each water treatment cabin. The sewage submersible pump in the upper-stage water treatment cabin is connected with the water inlet pipe of the lower-stage water treatment cabin. A plurality of water treatment cabins form a multistage ozone oxidation reaction system. A water outlet pipe is arranged on the tail water treatment cabin. An ozone interface for connecting the ozone gas supply pipe is arranged on the jet aeration device. The water flow outlet end of the jet aeration device is connected with the filler tray.

[0006] Further, cabinet bodies are located in the side of the instrument area and ozone preparation area are equipped with cabinet door.

[0007] Further, the equipment area and the reaction area are provided with a mesh plate, so that the equipment area and the reaction area are communicated with each other.

[0008] Further, the water outlet end of the sewage pump is provided with two pipelines, one pipeline forms an independent internal circulation ozone aeration in the water treatment cabin with the jet aeration device, and the other pipeline is connected with the water inlet pipe of the next stage water treatment cabin, and automatic control valves are arranged on the two pipelines respectively, and the automatic control valves are located in the instrument area.

[0009] Further, the equipment area and the reaction area are provided with a mesh plate, so that the equipment area and the reaction area are communicated with each other.

[0010] Further, the bottom of the filler tray is fixedly provided with a channel steel for strengthening support.

[0011] Further, the jet aeration device comprises a pointed cone structure outer shell, the pointed end of the outer shell is provided with a water inlet pipe, and the other end is provided with a water outlet pipe, the water inlet pipe is connected with the water outlet end of the sewage pump, the water outlet pipe is connected with the filler tray, a pointed cone structure inner shell is fixedly arranged in the outer shell, a narrow flow channel is formed between the inner shell and the outer shell, the rear end of the water inlet forms a horizontal flow section, a plurality of second partition plates are fixedly arranged on the circumference of the inner shell, the second partition plates divide the horizontal flow section into a plurality of jet areas, an ozone interface is arranged on each jet area, and the ozone interface is connected with the ozone gas supply pipe.

[0012] Further, the rear end of the inner shell is an open end, and the water outlet pipe extends to the inside of the inner shell, and a backflow area is formed between the water outlet pipe and the inner shell.

[0013] Further, the jet aeration device comprises a water supply main pipe, the water supply main pipe is connected with the water outlet end of the sewage pump, a plurality of jet fine pipes are uniformly distributed along the length direction of the water supply main pipe, the jet fine pipes are connected side by side on one side of the filler tray, an ozone interface is arranged on each jet fine pipe, and the ozone interface is connected with the ozone gas supply pipe.

[0014] The integrated box cabinet system for removing COD of refractory industrial wastewater has the beneficial effects that: by optimizing the structure of the box cabinet system and improving the intelligent control level, the ozone catalyst is combined with the efficient jet aeration device, the catalytic mechanism is combined, an integrated box cabinet system from molecular microcosmic reaction to engineering macroscopic application is integrated and developed, the ozone mass transfer efficiency is significantly improved, the ozone utilization rate is effectively improved, the circulation is multiple, the gas mass transfer coefficient is improved, the catalytic efficiency is improved, and the cost is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0015] The accompanying drawings are included to provide a further understanding of the application and are incorporated in and constitute a part of the specification, illustrate embodiments of the application and are used to explain the application, but are not intended to limit the application. In the drawings:

[0016] Figure 1 is a structural schematic diagram of the application in Example 1;

[0017] Figure 2 is Figure 1 is a sectional structural schematic diagram of A-A;

[0018] Figure 3 is a structural schematic diagram of the internal structure of the jet aeration device in Example 2;

[0019] Figure 4 is a structural schematic diagram of the internal structure of the jet aeration device in Example 3;

[0020] Figure 5 is a structural schematic diagram of the top view of the jet aeration device in Example 3;

[0021] In the drawings, reference signs are: 1, cabinet body; 11, instrument area; 12, equipment area; 13, reaction area; 14, ozone preparation area; 15, net plate; 16, first partition plate; 160, water treatment cabin; 17, filler layer; 18, backwashing area; 19, filler tray; 191, channel steel; 2, water inlet pipe; 3, sewage submersible pump; 4, jet aeration device; 40, outer shell; 41, water inlet connector; 42, water outlet connector; 43, inner shell; 44, jet area; 45, second partition plate; 46, ozone interface; 47, backflow area; 48, water supply main pipe; 49, jet fine pipe; 5, water outlet pipe; 6, emptying pipe; 7, ozone generator; 71, ozone gas supply pipe; 8, automatic control valve; 9, cabinet door. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the application will be clearly and completely described below with reference to the drawings in the embodiments of the application; obviously, the described embodiments are only some of the embodiments of the application, but not all the embodiments of the application, and all other embodiments obtained by those skilled in the art based on the embodiments in the application without creative efforts fall within the protection scope of the application.

[0023] In the description of the application, it should be noted that the terms "upper", "lower", "inner", "outer", "top / bottom end" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the application.

[0024] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "provided with", "sleeved / connected", "connected" and the like should be understood broadly, for example, "connected" can be fixedly connected, or detachably connected, or integrally connected; can be mechanically connected, or electrically connected; can be directly connected, or indirectly connected through an intermediate medium, or can be connected internally between two elements. For those skilled in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0025] The structural features of the present application will be described in detail in conjunction with the accompanying drawings.

[0026] Embodiment 1

[0027] Referring to Figures 1-2 A kind of integrated box system for removing COD of refractory industrial wastewater, including cabinet 1, instrument area 11 is located in the width direction in cabinet 1, the other side is divided into multiple independent water treatment cabins 160 along the length direction of cabinet 1 by first partition 16, equipment area 12 and reaction zone 13 are equipped in each water treatment cabin 160, net plate 15 is arranged between equipment area 12 and reaction zone 13, so that equipment area 12 and reaction zone 13 are communicated with each other, wherein, net plate 15 is multi-hole plate or screen plate, and each equipment area 12 and reaction zone 13 are connected with emptying pipe 6. One end of cabinet 1 is equipped with ozone preparation zone 14, ozone generator 7 is arranged in ozone preparation zone 14, ozone generator 7 is connected with ozone gas supply pipe 71, ozone gas supply pipe 71 is located in instrument area 11, cabinet door 9 is arranged on the side of cabinet 1 located in instrument area 11 and ozone preparation zone 14, and side opening door is used to facilitate operation and maintenance.

[0028] Filler layer 17 is arranged in reaction zone 13, backwashing zone 18 is arranged below filler layer 17, filler tray 19 is fixed between backwashing zone 18 and filler layer 17, in order to make filler tray 19 have better supporting capacity, groove steel 191 for strengthening support is fixedly arranged on the bottom of filler tray 19, filler tray 19 is hollow structure, and the top is provided with opening.

[0029] The multiple water treatment cabins 160 constitute a multi-stage ozone oxidation reaction system, each of which is provided with a water inlet pipe 2, a sewage submersible pump 3, and a jet aeration device 4 connected with the sewage submersible pump 3, the sewage submersible pump 3 in the upper-stage water treatment cabin 160 is connected with the water inlet pipe 2 in the lower-stage water treatment cabin 160, the water treatment cabin 160 located at the tail is provided with a water outlet pipe 5, the water outlet end of the sewage submersible pump 3 is provided with two pipelines, one of which forms an independent internal circulation ozone aeration in the water treatment cabin 160 with the jet aeration device 4, and the other of which is connected with the water inlet pipe 2 in the lower-stage water treatment cabin 160, the two pipelines are respectively provided with automatic control valves 8, the automatic control valves 8 are located in the instrument area 11, and the water supply direction of the sewage submersible pump 3 is automatically controlled through the automatic control valves 8, when the automatic control valves 8 on the pipelines of the sewage submersible pump 3 and the jet aeration device 4 are opened and the automatic control valve 8 leading to the lower-stage water treatment cabin 160 is closed, the internal circulation ozone aeration can be formed in the water treatment cabin 160, and the repeated ozone aeration treatment of the sewage in the water treatment cabin 160 is realized. The jet aeration device 4 is provided with an ozone interface 46 for connecting an ozone supply pipe 71, and the water flow outlet end of the jet aeration device 4 is connected with a filler tray 19, when the internal circulation ozone aeration is formed in the water treatment cabin 160, a micro high-concentration ozone catalytic oxidation area can be formed in the jet aeration device 4, so that the high-concentration ozone catalytically oxidizes the sewage in the jet aeration device 4 to remove the COD in the sewage, and the jet-out sewage (containing high-concentration ozone) enters the filler tray 19 to continue the micro-space high-concentration ozone catalytic oxidation until entering the filler layer 17.

[0030] The integrated cabinet system for removing COD of the refractory industrial wastewater of the present application, by optimizing the structure of the cabinet system and improving the intelligent control level, utilizes the combination of the ozone catalyst and the high-efficiency jet aeration device, combines the catalytic mechanism, and integrates and develops an integrated cabinet system from the molecular micro-reaction to the engineering macro-application, which on the one hand significantly improves the ozone mass transfer efficiency, effectively improves the ozone utilization rate, and on the other hand, in the use process, multiple circulation is realized, the gas mass transfer coefficient is improved, the catalytic efficiency is improved, and the cost is reduced.

[0031] Specifically, in use, the industrial wastewater enters from the first water treatment cabin 160, is sent into the reaction area 13 by the sewage submersible pump 3 through the jet aeration device 4, forms the internal circulation ozone aeration oxidation treatment, completes the ozone oxidation reaction in the micro-space when passing through the jet aeration device 4, and can make the ozone fully contact with the sewage in the jet aeration device 4 to form a micro-reaction area, realizes the improvement of the ozone mass transfer efficiency and the ozone utilization rate, and at the same time improves the ozone gas mass transfer coefficient in the micro-reaction area, improves the catalytic efficiency, and after completing the internal circulation ozone aeration in the set time, the industrial wastewater enters the next-stage water treatment cabin 160 to perform the next internal circulation ozone aeration oxidation treatment, until the treated water meeting the standard is discharged from the water outlet pipe 5.

[0032] Embodiment 2

[0033] With reference to Figure 3 , as another preferred embodiment of the present application, the difference from Embodiment 1 is that the jet aeration device 4 comprises a pointed cone structure outer shell 40, the tip of the outer shell 40 is provided with a water inlet pipe 41, the other end is provided with a water outlet pipe 42, the water inlet pipe 41 is connected to the water outlet end of the sewage pump 3, the water outlet pipe 42 is connected to the filler tray 19, a pointed cone structure inner shell 43 is fixedly arranged in the outer shell 40, a narrow flow passage is formed between the inner shell 43 and the outer shell 40, the rear end of the water inlet forms a horizontal flow section, a plurality of second partitions 45 are fixedly arranged on the circumference of the inner shell 43, the second partitions 45 divide the horizontal flow section into a plurality of jet zones 44, each jet zone 44 is provided with an ozone interface 46, the ozone interface 46 is connected to the ozone gas supply pipe 71. The rear end of the inner shell 43 is an open end, the water outlet pipe 42 extends to the inside of the inner shell 43, and a backflow zone 47 is formed between the inner shell 43. When the sewage is sent by the sewage pump 3 to the water inlet pipe 41 and enters the narrow flow passage, the flow rate of the sewage in the jet zone 44 is accelerated due to the narrowing of the passage, and ozone is introduced into the sewage through the ozone interface 46, forming a gas-liquid mixture in the jet zone 44. Due to the flatness of the passage in the jet zone 44, the pressure increases and the flow rate increases, which can make the high-concentration ozone form a micro-reaction zone with the sewage in the jet zone 44, so as to further improve the ozone mass transfer efficiency and ozone utilization rate. The setting of the backflow zone 47 can make the sewage in the plurality of jet zones 44 mix again, and the catalytic oxidation is carried out again in the small space of the backflow zone 47, further improving the ozone utilization rate and catalytic efficiency.

[0034] Embodiment 3

[0035] With reference to Figures 4-5 , as another preferred embodiment of the present application, the difference from Embodiment 1 is that the jet aeration device 4 comprises a water supply main pipe 48, the water supply main pipe 48 is connected to the water outlet end of the sewage pump 3, a plurality of jet fine pipes 49 are uniformly distributed along the length direction of the water supply main pipe 48, the jet fine pipes 49 are connected side by side on one side of the filler tray 19, each jet fine pipe 49 is provided with an ozone interface 46, and the ozone interface 46 is connected to the ozone gas supply pipe 71. The setting of the jet fine pipe 49 can form a plurality of micro-reaction zones on the water supply main pipe 48, increase the amount of sewage treatment, and the longer the length of the jet fine pipe 49, the better the catalytic oxidation effect on COD in the sewage.

[0036] The above merely describes the preferred embodiments of the present application and is not used to limit the present application, and although the present application is described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments, or equivalently replace some technical features thereof. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An integrated cabinet system for removing COD from recalcitrant industrial wastewater, comprising a cabinet (1), characterized in that, The cabinet (1) has an instrument area (11) on one side in the width direction, and the other side is divided into multiple independent water treatment chambers (160) along the length direction of the cabinet (1) by the first partition (16). Each water treatment chamber (160) has an equipment area (12) and a reaction area (13). One end of the cabinet (1) is provided with an ozone preparation area (14), and an ozone generator (7) is provided in the ozone preparation area (14). The ozone generator (7) is connected to an ozone supply pipe (71), and the ozone supply pipe (71) is located in the instrument area (11). The reaction zone (13) is provided with a packing layer (17), and a backwashing zone (18) is provided below the packing layer (17). A packing tray (19) is fixed between the backwashing zone (18) and the packing layer (17). The packing tray (19) has a hollow structure inside and an opening at the top. Each of the water treatment chambers (160) is equipped with an inlet pipe (2), a submersible pump (3), and a jet aeration device (4) connected to the submersible pump (3). The submersible pump (3) in the upper-level water treatment chamber (160) is connected to the inlet pipe (2) of the lower-level water treatment chamber (160). The multiple water treatment chambers (160) constitute a multi-stage ozone oxidation reaction system. The water treatment chamber (160) at the tail end is equipped with an outlet pipe (5). The jet aeration device (4) is provided with an ozone interface (46) for connecting the ozone supply pipe (71), and the water discharge end of the jet aeration device (4) is connected to the packing tray (19). The jet aeration device (4) includes a conical outer shell (40), with a water inlet pipe (41) at the tip and a drain pipe (42) at the other end. The water inlet pipe (41) is connected to the outlet of the submersible pump (3), and the drain pipe (42) is connected to the packing tray (19). A conical inner shell (43) is fixed inside the outer shell (40), forming a narrow flow channel between the inner shell (43) and the outer shell (40). A horizontal flow section is formed at the rear end of the water inlet. Multiple second partitions (45) are fixed in the circumferential direction of the inner shell (43). The second partitions (45) divide the horizontal flow section into multiple jet zones (44). Each jet zone (44) is provided with an ozone interface (46), which is connected to the ozone supply pipe (71). The rear end of the inner shell (43) is open, and the drain pipe (42) extends into the interior of the inner shell (43) to form a backflow zone (47) between the drain pipe (42) and the inner shell (43).

2. The integrated cabinet system for COD removal from recalcitrant industrial wastewater according to claim 1, characterized in that, The cabinet (1) is equipped with cabinet doors (9) on the sides of the instrument area (11) and the ozone preparation area (14).

3. The integrated cabinet system for COD removal from recalcitrant industrial wastewater according to claim 1, characterized in that, A mesh plate (15) is provided between the equipment area (12) and the reaction area (13) to connect the equipment area (12) and the reaction area (13).

4. The integrated cabinet system for removing COD from recalcitrant industrial wastewater according to claim 1, characterized in that, The outlet of the submersible pump (3) is provided with two pipelines. One pipeline forms an independent internal circulation ozone aeration with the jet aeration device (4) in the water treatment chamber (160). The other pipeline is connected to the inlet pipe (2) of the next-level water treatment chamber (160). Automatic control valves (8) are provided on the two pipelines respectively. The automatic control valves (8) are located in the instrument area (11).

5. The integrated cabinet system for COD removal from recalcitrant industrial wastewater according to claim 1, characterized in that, Each of the aforementioned equipment areas (12) and reaction areas (13) is connected to an vent pipe (6).

6. The integrated cabinet system for COD removal from recalcitrant industrial wastewater according to claim 1, characterized in that, The bottom of the filling tray (19) is fixed with a channel steel (191) for reinforcing support.

7. The integrated cabinet system for COD removal from recalcitrant industrial wastewater according to claim 1, characterized in that, The jet aeration device (4) includes a water supply main pipe (48), which is connected to the outlet of the submersible pump (3). The water supply main pipe (48) has multiple jet tubes (49) evenly distributed along its length. The jet tubes (49) are connected side by side to one side of the packing tray (19). Each jet tube (49) is provided with an ozone interface (46), which is connected to the ozone supply pipe (71).

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