Segmented catalytic wet oxidation sewage treatment device and treatment method

Abstract

The invention discloses a sectional catalytic wet oxidation sewage treatment device and a treatment method, and aims to solve the technical problem that in the prior art, when sewage is oxidized, introduced oxygen can only be in contact with the surface of the sewage, so that the sewage cannot be quickly oxidized, and the treatment efficiency is relatively low. The device comprises a heating unit and a segmented catalytic reaction unit, wherein the heating unit comprises a heat exchange device and a heating device; the segmented catalytic reaction unit comprises a first catalytic reactor, a first empty tower reactor, a second catalytic reactor and a second empty tower reactor; each of the first catalytic reactor and the second catalytic reactor comprises a base, a filter box is fixedly mounted at the front end of the top of the base, a pump machine is fixedly mounted behind the filter box, and a treatment tank is fixedly mounted at the rear end of the top of the base. The sewage oxidation treatment efficiency is greatly improved.

Description

Technical Field

[0001] The invention belongs to the technical field of organic wastewater treatment, and specifically relates to a segmented catalytic wet oxidation sewage treatment device and a treatment method. Background Art

[0002] Catalytic wet oxidation is an advanced environmental protection technology for treating high-concentration organic wastewater developed internationally in the mid-1980s on the basis of wet oxidation. Under certain temperature, pressure and catalyst, the organic matter and ammonia in the wastewater are oxidized and decomposed into harmless substances such as CO2, H2O and N2 through air oxidation to achieve the purpose of purification. Catalytic wet oxidation has the characteristics of high purification efficiency, simple process and small footprint, and has broad industrial application prospects. Catalytic wet oxidation is suitable for treating various industrial organic wastewaters containing high chemical oxygen demand or compounds that cannot be degraded by biochemical methods (such as ammonia nitrogen, polycyclic aromatic hydrocarbons, carcinogens BAP, etc.) in industries such as coking, dyes, pesticides, printing and dyeing, petrochemicals, and leather.

[0003] After searching, the Chinese patent publication number CN109437431A discloses a catalytic wet oxidation treatment device for dye wastewater, which relates to the technical field of wastewater treatment equipment, specifically a catalytic wet oxidation treatment device for dye wastewater, comprising a lower base and a limit seat, a composite rubber layer is arranged above the lower base, and an upper base is arranged above the composite rubber layer, a pressure bearing seat is fixed above the upper base, a main body shell is arranged above the limit seat, an oxidation chamber and an electric component chamber are respectively arranged inside the main body shell, and the oxidation chamber is located below the electric component chamber; The above-mentioned catalytic wet oxidation treatment equipment for dye wastewater has greatly improved the practical performance of the entire device while increasing the structure. The improved equipment can improve the compressive stress resistance of the main shell through the support rod, form a supporting operation for the entire interior of the device, and the output flow of the sewage can be controlled by the valve body. The filter plate inside the valve body can coarsely filter the sewage. However, when the device is in use, when the sewage is passed into the interior of the main shell of the oxidation bin, the oxygen introduced can only contact the surface of the sewage, resulting in the inability to quickly oxidize the sewage, resulting in low treatment efficiency.

[0004] Therefore, it is particularly important to design a segmented catalytic wet oxidation sewage treatment device and treatment method to solve the above-mentioned defects. Summary of the invention

[0005] (1) Technical issues to be resolved In view of the shortcomings of the prior art, the purpose of the present invention is to provide a segmented catalytic wet oxidation sewage treatment device and a treatment method. The device is intended to solve the technical problem that under the prior art, when oxidizing sewage, the oxygen introduced can only contact the surface of the sewage, resulting in the inability to quickly oxidize the sewage, thereby resulting in low treatment efficiency.

[0006] (2) Technical solution In order to solve the above technical problems, the present invention provides a staged catalytic wet oxidation sewage treatment device, which includes a heating unit and a staged catalytic reaction unit. The heating unit includes a heat exchange device and a heating device, and the staged catalytic reaction unit includes a first catalytic reactor, a first empty tower reactor, a second catalytic reactor and a second empty tower reactor; The first catalytic reactor and the second catalytic reactor both include a base, a filter box is fixedly installed at the front end of the top of the base, a pump is fixedly installed at the rear of the filter box, a treatment tank is fixedly installed at the rear end of the top of the base, an input end of the pump is connected to the bottom end of the filter box, an output end of the pump is connected to the top of the treatment tank, a stirring shaft is rotatably connected inside the treatment tank, a transmission chassis is fixedly installed at the top of the treatment tank and at the top of the stirring shaft, an oxygen inlet pipe is rotatably connected to the top of the stirring shaft, and a dosing pipe is fixedly installed at one end of the top of the treatment tank; A plurality of stirring rods are fixedly connected to the outer side of the stirring shaft, and telescopic rods are slidably connected to the ends of the plurality of stirring rods away from the stirring shaft. An oxygen inlet channel is provided inside the stirring rod, and a main oxygen outlet is provided at a position of the bottom end of the stirring rod corresponding to the oxygen inlet channel. The interiors of the oxygen inlet pipe, the stirring rod and the telescopic rod are all connected to the oxygen inlet channel, and a plurality of oxygen outlet heads are fixedly connected to the outer sides of the plurality of telescopic rods.

[0007] When using the device of the present technical solution, the raw sewage is first heated, and the heated raw sewage is passed into the segmented catalytic reaction unit for multi-stage oxidation reaction, and the sewage is introduced into the filter box for filtration, which can prevent excessive impurities in the sewage from accumulating in the treatment tank and causing residues, and then it is transported into the interior of the treatment tank through a pump, and the water treatment agent is introduced through the dosing pipe, and oxygen is introduced through the oxygen inlet pipe. Then the oxygen is introduced into the interior of the oxygen inlet channel, and discharged to the bottom of the treatment tank through the main oxygen outlet, and at the same time introduced into the interior of the stirring rod and the telescopic rod, and finally discharged through multiple sets of oxygen outlet heads, so that the oxygen can fully contact with the sewage. In this process, the stirring shaft is controlled to rotate so that the stirring rod and the telescopic rod stir the sewage, so that the discharged oxygen enters The sewage is contacted with the heater in one step, and the sewage is heated to the reaction temperature by the heater. Heating can increase the reaction rate and make the organic matter react with oxygen faster, thereby improving the treatment efficiency. At the same time, the insulation layer formed between the insulation shell and the treatment tank is used for insulation, thereby avoiding excessive heat loss and reducing the treatment effect. In the process of using the heater to heat the sewage, the heating efficiency is limited because the heat starts to rise from the bottom. At this time, a heat source such as hot water or hot steam is introduced into the inlet pipe, and the heat source is introduced into the serpentine coil through the inlet pipe. The heat source after use is exported through the outlet pipe, and the heat source in the serpentine coil is used to quickly heat the treatment tank, so that the sewage inside the treatment tank can be quickly heated, thereby greatly improving the efficiency of oxidation treatment of sewage.

[0008] Preferably, a telescopic sleeve is fixedly connected to the position inside the stirring rod corresponding to the telescopic rod, the telescopic rod is slidably connected to the telescopic sleeve, and multiple groups of first springs are movably installed inside the telescopic sleeve, and a scraper is fixedly connected to the end of the telescopic rod away from the stirring rod, and the scraper is in contact with the inner wall of the processing tank.

[0009] Furthermore, a box cover is fixedly installed on the top of the filter box, a water inlet pipe is fixedly connected to the top of the box cover, a water guide hopper is set up inside the filter box, a filter net is fixedly installed on the bottom end of the water guide hopper, and the bottom end of the filter box is fixedly connected to the input end of the pump through a first connecting pipe.

[0010] Furthermore, a water receiving pipe is fixedly installed on the top of the processing tank, and the water receiving pipe is fixedly connected to the output end of the pump through a second connecting pipe, and the second connecting pipe is provided with a first solenoid valve.

[0011] Furthermore, a heat-insulating shell is fixedly installed on the outside of the processing tank, and a heat-insulating layer is formed between the heat-insulating shell and the processing tank. A heater is fixedly installed on the bottom end of the heat-insulating shell, and the heater extends to the inside of the processing tank.

[0012] Furthermore, a serpentine coil is fixedly connected to the outer wall of the treatment tank, and an inlet pipe and an outlet pipe are fixedly connected to both ends of the serpentine coil, and both the inlet pipe and the outlet pipe extend to the outside of the insulation shell.

[0013] Furthermore, an inspection cover is fixedly installed on the top of the transmission chassis, a drive motor is fixedly installed on the right end of the top of the inspection cover, a drive sprocket is fixedly installed on the driving end of the drive motor, a drive sprocket is fixedly installed on the outer side of the top of the stirring shaft, and the drive sprocket is connected to the drive sprocket through a chain.

[0014] Furthermore, a movable column is slidably connected inside the oxygen inlet pipe, a second spring is movably installed at the bottom end of the movable column, a top plate is fixedly connected to the top end of the movable column, and a rubber plug is fixedly connected inside the top plate.

[0015] Furthermore, the dosing pipe is an inclined square tube, the top of the dosing pipe is fixedly connected to a water adding pipe, the water adding pipe is attached to a second solenoid valve, the outer side of the dosing pipe is threadedly connected to a dosing cap, one end of the dosing pipe located inside the treatment tank is fixedly connected to a diverter box, the inner side of the diverter box is fixedly connected to a plurality of discharge heads, the interior of the plurality of discharge heads are provided with a plurality of discharge ports, and the interior of the diverter box is fixedly connected to a plurality of slow flow plates.

[0016] The present invention also provides a treatment method, comprising a segmented catalytic wet oxidation sewage treatment device according to any one of the above items, and the specific operation steps are as follows: S1, the sewage is introduced into the filter box for filtration, which can prevent excessive impurities in the sewage from accumulating in the treatment tank and causing residues; S2, transporting the water treatment agent into the treatment tank through a pump, and introducing the water treatment agent into the treatment tank through a dosing pipe; S3, oxygen is introduced through the oxygen inlet pipe, then introduced into the interior of the oxygen inlet channel, discharged to the bottom of the treatment tank through the main oxygen outlet, and introduced into the interior of the stirring rod and the telescopic rod at the same time, and finally discharged through multiple sets of oxygen outlet heads, so that oxygen and sewage are fully in contact; S4, controlling the stirring shaft to rotate so that the stirring rod and the telescopic rod stir the sewage, so that the discharged oxygen further contacts the sewage; S5, the sewage is heated to the reaction temperature by a heater. Heating can increase the reaction rate, allowing the organic matter to react with oxygen more quickly, thereby improving the treatment efficiency. At the same time, the insulation layer formed between the insulation shell and the treatment tank is used for insulation, thereby preventing the heat from being lost too quickly and reducing the treatment effect. S6. In the process of using the heater to heat the sewage, the heating efficiency is limited because the heat rises from the bottom. At this time, the inlet pipe is introduced into a heat source such as hot water or hot steam, and the heat source is introduced into the serpentine coil through the inlet pipe. The used heat source is exported through the outlet pipe, and the heat source in the serpentine coil is used to quickly heat the treatment tank, so that the sewage inside the treatment tank can be quickly heated.

[0017] (3) Beneficial effects Compared with the prior art, the present invention has the following beneficial effects: The present invention adopts the coordinated design of the stirring shaft and the transmission case, introduces oxygen through the oxygen inlet pipe, then introduces the oxygen into the interior of the oxygen inlet channel, and discharges it to the bottom end of the treatment tank through the main oxygen outlet, and at the same time introduces it into the interior of the stirring rod and the telescopic rod, and finally discharges it through multiple groups of oxygen outlet heads, so that the oxygen can fully contact with the sewage. In this process, the stirring shaft is controlled to rotate, so that the stirring rod and the telescopic rod stir the sewage, and the discharged oxygen further contacts with the sewage, which greatly improves the efficiency of oxidation treatment of the sewage.

[0018] The present invention heats the sewage to the reaction temperature through the design of the treatment tank. The heating can increase the reaction rate and make the organic matter react with oxygen more quickly, thereby improving the treatment efficiency. At the same time, the insulation is carried out through the insulation layer formed between the insulation shell and the treatment tank, thereby avoiding excessive heat loss and reducing the treatment effect. In the process of using the heater to heat the sewage, the heating efficiency is limited because the heat starts to rise from the bottom. At this time, the inlet pipe is introduced into the heat source such as hot water or hot steam, and the heat source is introduced into the serpentine coil through the inlet pipe. The heat source after use is exported through the outlet pipe. The heat source in the serpentine coil is used to quickly heat the treatment tank, so that the sewage inside the treatment tank can be quickly heated, thereby greatly improving the efficiency of oxidation treatment of the sewage.

[0019] The present invention adopts the design of a dosing pipe. After the sewage is introduced into the interior of the treatment tank, the dosing cover is opened to put the water treatment agent into the inner side of the dosing pipe, and then the dissolved water is introduced into the interior of the dosing pipe through the water adding pipe. Under the impact of the dissolved water, the water treatment agent is flushed to the interior of the diversion box, and the agglomerated water treatment agents are broken after hitting multiple groups of slow flow plates. At the same time, the flow rate of the water flow is reduced by the slow flow plates so that the broken water treatment agents can be fully dissolved. Subsequently, the dissolved water treatment agents are evenly discharged into the treatment tank through the discharge ports in the multiple groups of discharge heads, thereby improving the dissolution efficiency of the water treatment agents, avoiding the agglomeration of the water treatment agents and reducing the concentration of the water treatment agents and the waste of the water treatment agents, and further improving the sewage treatment effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the structure of the first catalytic reactor and the second catalytic reactor of the present invention; Figure 3 This is a schematic diagram of the internal structure of the filter box of the present invention; Figure 4 This is a schematic diagram of the external structure of the treatment tank of the present invention; Figure 5 It is a schematic diagram of the internal structure of the transmission case of the present invention; Figure 6 This is a schematic diagram of the internal structure of the treatment tank of the present invention; Figure 7 for Figure 6 Enlarged view of point A in the middle; Figure 8 This is a cross-sectional view of the internal structure of the stirring shaft, stirring rod and telescopic rod of the present invention; Fig. 9 This is a schematic diagram of the serpentine coil structure of the present invention; Fig.10 This is a schematic diagram of the structure of the dosing tube of the present invention; Fig.11 It is a cross-sectional view of the internal structure of the diverter box of the present invention.

[0021] The markings in the accompanying drawings are: 1, heating unit; 2, segmented catalytic reaction unit; 3, heat exchange device; 4, heating device; 5, first catalytic reactor; 6, first empty tower reactor; 7, second catalytic reactor; 8, second empty tower reactor; 9, base; 10, filter box; 1001, box cover; 1002, water inlet pipe; 1003, water guide bucket; 1004, filter screen; 1005, first connecting pipe; 11, pump; 12, treatment tank; 1201, water receiving pipe; 1202, second connecting pipe; 1203, first solenoid valve; 1204, insulation shell; 1205, insulation layer; 1206, heater; 1207, serpentine coil; 1208, inlet pipe; 1209, outlet pipe; 13, stirring shaft; 1 301, stirring rod; 1302, telescopic rod; 1303, oxygen inlet channel; 1304, main oxygen outlet; 1305, oxygen outlet head; 1306, telescopic sleeve; 1307, first spring; 1308, scraper; 14, transmission chassis; 1401, inspection cover; 1402, drive motor; 1403, drive sprocket; 1404, transmission sprocket; 1405, chain; 15, oxygen inlet pipe; 1501, movable column; 1502, second spring; 1503, top sheet; 1504, rubber plug; 16, dosing pipe; 1601, water adding pipe; 1602, second solenoid valve; 1603, dosing cover; 1604, diverter box; 1605, discharge head; 1606, outlet; 1607, slow flow plate. DETAILED DESCRIPTION

[0022] This specific embodiment is a segmented catalytic wet oxidation sewage treatment device, and its structural schematic diagram is as follows Figure 1-11 As shown, the device comprises a heating unit 1 and a staged catalytic reaction unit 2, the heating unit 1 comprises a heat exchange device 3 and a heating device 4, the staged catalytic reaction unit 2 comprises a first catalytic reactor 5, a first empty tower reactor 6, a second catalytic reactor 7 and a second empty tower reactor 8; First, the raw sewage is heated, and the heated raw sewage is introduced into the staged catalytic reaction unit 2 for multi-stage oxidation reaction, thereby achieving staged treatment of the sewage and improving the treatment effect.

[0023] Furthermore, the first catalytic reactor 5 and the second catalytic reactor 7 both include a base 9, a filter box 10 is fixedly installed at the front end of the top of the base 9, a pump 11 is fixedly installed behind the filter box 10, a treatment tank 12 is fixedly installed at the rear end of the top of the base 9, the input end of the pump 11 is connected to the bottom end of the filter box 10, the output end of the pump 11 is connected to the top of the treatment tank 12, the inside of the treatment tank 12 is rotatably connected to a stirring shaft 13, a transmission chassis 14 is fixedly installed at the top of the treatment tank 12 and located at the top of the stirring shaft 13, the top of the stirring shaft 13 is rotatably connected to an oxygen inlet pipe 15, and one end of the top of the treatment tank 12 is fixedly installed.

[0024] Furthermore, multiple groups of stirring rods 1301 are fixedly connected to the outer side of the stirring shaft 13, and the ends of the multiple groups of stirring rods 1301 away from the stirring shaft 13 are slidably connected to telescopic rods 1302, and the stirring rods 1301 are provided with oxygen inlet channels 1303, and the bottom of the stirring rods 1301 is provided with a main oxygen outlet 1304 at a position corresponding to the oxygen inlet channel 1303, and the interiors of the oxygen inlet pipe 15, the stirring rods 1301 and the telescopic rods 1302 are all connected to the oxygen inlet channel 1303, and the outer sides of the multiple groups of telescopic rods 1302 are fixedly connected to multiple groups of oxygen outlet heads 1305, During treatment, oxygen is introduced through the oxygen inlet pipe 15, and then introduced into the interior of the oxygen inlet channel 1303, and discharged to the bottom end of the treatment tank 12 through the main oxygen outlet 1304, and at the same time introduced into the interior of the stirring rod 1301 and the telescopic rod 1302, and finally discharged through multiple sets of oxygen outlet heads 1305, so that oxygen can fully contact with the sewage. In this process, the stirring shaft 13 is controlled to rotate, so that the stirring rod 1301 and the telescopic rod 1302 stir the sewage, so that the discharged oxygen further contacts with the sewage, thereby greatly improving the efficiency of oxidation treatment of the sewage.

[0025] Furthermore, a telescopic sleeve 1306 is fixedly connected to the position inside the stirring rod 1301 corresponding to the telescopic rod 1302, the telescopic rod 1302 is slidably connected to the telescopic sleeve 1306, and a plurality of groups of first springs 1307 are movably installed inside the telescopic sleeve 1306, and a scraper 1308 is fixedly connected to the end of the telescopic rod 1302 away from the stirring rod 1301, and the scraper 1308 is in contact with the inner wall of the processing tank 12. Under the action of the first spring 1307, the telescopic rod 1302 always extends outward from the stirring rod 1301, so that the scraper 1308 is always in contact with the inner wall of the processing tank 12, and the scraper 1308 is used to scrape the inner wall of the processing tank 12 when the stirring shaft 13 rotates, thereby avoiding a large amount of impurities adhering to the processing tank 12 and causing residues.

[0026] Then, a box cover 1001 is fixedly installed on the top of the filter box 10, and a water inlet pipe 1002 is fixedly connected to the top of the box cover 1001. A water guide bucket 1003 is set up inside the filter box 10, and a filter screen 1004 is fixedly installed at the bottom end of the water guide bucket 1003. The bottom end of the filter box 10 is fixedly connected to the input end of the pump 11 through the first connecting pipe 1005. The sewage is introduced into the interior of the filter box 10 through the water inlet pipe 1002, and is first filtered through the filter screen 1004 under the guidance of the water guide bucket 1003. This can prevent excessive impurities in the sewage from accumulating in the treatment tank 12 and causing residues. At the same time, the box cover 1001 can be disassembled to clean the water guide bucket 1003, and the subsequently filtered sewage is pumped by the pump 11 to the interior of the treatment tank 12 for oxidation treatment.

[0027] Furthermore, a water receiving pipe 1201 is fixedly installed on the top of the treatment tank 12, and the water receiving pipe 1201 is fixedly connected to the output end of the pump 11 through a second connecting pipe 1202, and the second connecting pipe 1202 is provided with a first solenoid valve 1203. The sewage filtered by the filter box 10 is pumped through the pump 11, and is introduced into the interior of the treatment tank 12 for treatment under the transmission of the second connecting pipe 1202 and the water receiving pipe 1201. The opening and closing of the second connecting pipe 1202 can be controlled by the first solenoid valve 1203 when the treatment tank 12 oxidizes the sewage.

[0028] Among them, an insulation shell 1204 is fixedly installed on the outside of the treatment tank 12, and an insulation layer 1205 is formed between the insulation shell 1204 and the treatment tank 12. A heater 1206 is fixedly installed on the bottom end of the insulation shell 1204, and the heater 1206 extends to the inside of the treatment tank 12. When the sewage is treated, it is also necessary to heat it. The sewage is heated to the reaction temperature by the heater 1206. Heating can increase the reaction rate and make the organic matter react with oxygen faster, thereby improving the treatment efficiency. At the same time, the insulation layer 1205 formed between the insulation shell 1204 and the treatment tank 12 is used for insulation, thereby avoiding excessive heat loss and reducing the treatment effect.

[0029] Furthermore, a serpentine coil 1207 is fixedly connected to the outer wall of the treatment tank 12, and an inlet pipe 1208 and an outlet pipe 1209 are fixedly connected to the two ends of the serpentine coil 1207, and the inlet pipe 1208 and the outlet pipe 1209 are extended to the outside of the insulation shell 1204. In the process of heating the sewage by using the heater 1206, the heating efficiency is limited because the heat starts to rise from the bottom. At this time, the inlet pipe 1208 is introduced into a heat source such as hot water or hot steam, and the heat source is introduced into the serpentine coil 1207 through the inlet pipe 1208. The used heat source is exported through the outlet pipe 1209, and the heat source in the serpentine coil 1207 is used to quickly heat the treatment tank 12, so that the sewage inside the treatment tank 12 can be quickly heated, thereby further improving the efficiency of sewage treatment.

[0030] Furthermore, an inspection cover 1401 is fixedly installed on the top of the transmission chassis 14, and a driving motor 1402 is fixedly installed on the right end of the top of the inspection cover 1401. A driving sprocket 1403 is fixedly installed on the driving end of the driving motor 1402, and a driving sprocket 1404 is fixedly installed on the outer side of the top of the stirring shaft 13. The driving sprocket 1404 is connected to the driving sprocket 1404 through a chain 1405. When the sewage is oxidized, the driving motor 1402 drives the driving sprocket 1403 to rotate, and the driving sprocket 1404 drives the stirring shaft 13 to rotate under the transmission of the chain 1405. Since the oxygen inlet pipe 15 is rotatably connected to the top of the stirring shaft 13, the sewage can be stirred by the rotating stirring shaft 13 while oxygen is normally introduced, so that the oxygen can be fully in contact with the sewage, which greatly improves the efficiency of the oxidation treatment of the sewage.

[0031] Secondly, a movable column 1501 is slidably connected inside the oxygen inlet pipe 15, and a second spring 1502 is movably installed at the bottom end of the movable column 1501. A top sheet 1503 is fixedly connected to the top of the movable column 1501, and a rubber plug 1504 is fixedly connected to the inside of the top sheet 1503. When oxygen is not introduced into the oxygen inlet pipe 15, the movable column 1501 is continuously pushed up by the action of the second spring 1502, so that the rubber plug 1504 inside the top sheet 1503 closes the top of the oxygen inlet pipe 15, thereby preventing external impurities from entering and the gas inside the treatment tank 12 from being discharged. When oxygen is introduced, the top sheet 1503 is pushed down under the pressure of the oxygen introduction, and then the oxygen is introduced through the through hole inside the top sheet 1503.

[0032] Finally, the dosing tube 16 is an inclined square tube, the top of the dosing tube 16 is fixedly connected to a water adding tube 1601, the water adding tube 1601 is attached with a second solenoid valve 1602, the outer side of the dosing tube 16 is threadedly connected to a dosing cap 1603, one end of the dosing tube 16 located inside the treatment tank 12 is fixedly connected to a diverter box 1604, the inner side of the diverter box 1604 is fixedly connected to multiple groups of discharge heads 1605, the multiple groups of discharge heads 1605 are provided with multiple groups of discharge ports 1606, the inside of the diverter box 1604 is fixedly connected to multiple groups of slow flow plates 1607, after the sewage is introduced into the treatment tank 12, the dosing cap 1603 is opened to put the water treatment agent into the dosing tube 16 After reaching the inner side, the dissolved water is introduced into the inside of the dosing pipe 16 through the water adding pipe 1601, and the water treatment agent is flushed to the inside of the diversion box 1604 under the impact of the dissolved water. The agglomerated water treatment agents are broken up after hitting the multiple groups of slow flow plates 1607. At the same time, the slow flow plates 1607 reduce the flow rate of the water flow so that the broken water treatment agents can be fully dissolved. Subsequently, the dissolved water treatment agents are evenly discharged into the treatment tank 12 through the discharge ports 1606 in the multiple groups of discharge heads 1605, thereby improving the dissolution efficiency of the water treatment agents, avoiding the agglomeration of the water treatment agents and reducing the concentration of the water treatment agents and the waste of the water treatment agents, and further improving the effect of sewage treatment.

[0033] When using the device of the present technical solution, the raw sewage is first heated, and the heated raw sewage is introduced into the staged catalytic reaction unit 2 for multi-stage oxidation reaction. The sewage is introduced into the filter box 10 for filtration, which can prevent excessive impurities in the sewage from accumulating in the treatment tank 12 to cause residues, and then it is transported into the interior of the treatment tank 12 through the pump 11, and the water treatment agent is introduced through the dosing pipe 16, and oxygen is introduced through the oxygen inlet pipe 15. Then the oxygen is introduced into the interior of the oxygen inlet channel 1303, and discharged to the bottom of the interior of the treatment tank 12 through the main oxygen outlet 1304, and at the same time introduced into the interior of the stirring rod 1301 and the telescopic rod 1302, and finally discharged through the multiple oxygen outlet heads 1305, so that the oxygen can fully contact with the sewage. In this process, the stirring shaft 13 is controlled to rotate so that the stirring rod 1301 and the telescopic rod 1302 stir the sewage, so that the discharged oxygen Further contact is made with the sewage, and the sewage is heated to the reaction temperature by the heater 1206. Heating can increase the reaction rate and make the organic matter react with oxygen more quickly, thereby improving the treatment efficiency. At the same time, insulation is performed by the insulation layer 1205 formed between the insulation shell 1204 and the treatment tank 12, thereby avoiding excessive heat loss and reducing the treatment effect. In the process of heating the sewage by the heater 1206, the heating efficiency is limited because the heat starts to rise from the bottom. At this time, the inlet pipe 1208 is introduced into the heat source such as hot water or hot steam. The heat source is introduced into the serpentine coil 1207 through the inlet pipe 1208, and the used heat source is exported through the outlet pipe 1209. The heat source in the serpentine coil 1207 is used to quickly heat the treatment tank 12, so that the sewage inside the treatment tank 12 can be quickly heated, thereby greatly improving the efficiency of the oxidation treatment of the sewage.

[0034] The embodiment of the present invention also provides a processing method, and the specific operation steps are as follows: S1, introducing sewage into the filter box 10 for filtering, which can prevent excessive impurities in the sewage from accumulating in the treatment tank 12 and causing residues; S2, the water treatment agent is transported into the treatment tank 12 through the pump 11, and the water treatment agent is introduced into the treatment tank 12 through the dosing pipe 16; S3, oxygen is introduced through the oxygen inlet pipe 15, and then introduced into the interior of the oxygen inlet channel 1303, and discharged to the bottom of the treatment tank 12 through the main oxygen outlet 1304, and introduced into the interior of the stirring rod 1301 and the telescopic rod 1302, and finally discharged through the multiple oxygen outlet heads 1305, so that the oxygen is fully in contact with the sewage; S4, controlling the stirring shaft 13 to rotate, so that the stirring rod 1301 and the telescopic rod 1302 stir the sewage, so that the discharged oxygen further contacts the sewage; S5, the sewage is heated to the reaction temperature by the heater 1206. Heating can increase the reaction rate, so that the organic matter reacts with oxygen more quickly, thereby improving the treatment efficiency. At the same time, the insulation layer 1205 formed between the insulation shell 1204 and the treatment tank 12 is used for insulation, thereby preventing the heat from being lost too quickly and reducing the treatment effect. S6. In the process of heating the sewage by using the heater 1206, since the heat rises from the bottom and the heating efficiency is limited, the inlet pipe 1208 is introduced into a heat source such as hot water or hot steam. The heat source is introduced into the serpentine coil 1207 through the inlet pipe 1208. The used heat source is exported through the outlet pipe 1209. The heat source in the serpentine coil 1207 is used to quickly heat the treatment tank 12, so that the sewage inside the treatment tank 12 can be quickly heated.

[0035] The above embodiments are preferred implementation schemes of the present invention. In addition, the present invention may also be implemented in other ways. Any obvious replacement without departing from the concept of the present technical solution is within the protection scope of the present invention.

Claims

1. A staged catalytic wet oxidation sewage treatment device, comprising a heating unit (1) and a staged catalytic reaction unit (2); characterized in that: The heating unit (1) comprises a heat exchange device (3) and a heating device (4); the staged catalytic reaction unit (2) comprises a first catalytic reactor (5), a first empty tower reactor (6), a second catalytic reactor (7) and a second empty tower reactor (8); The first catalytic reactor (5) and the second catalytic reactor (7) both comprise a base (9), a filter box (10) being fixedly mounted at the front end of the top of the base (9), a pump (11) being fixedly mounted at the rear of the filter box (10), a treatment tank (12) being fixedly mounted at the rear end of the top of the base (9), an input end of the pump (11) being connected to the bottom end of the filter box (10), an output end of the pump (11) being connected to the top end of the treatment tank (12), a stirring shaft (13) being rotatably connected inside the treatment tank (12), a transmission case (14) being fixedly mounted at the top of the treatment tank (12) and located at the top end of the stirring shaft (13), an oxygen inlet pipe (15) being rotatably connected to the top end of the stirring shaft (13), and a dosing pipe (16) being fixedly mounted at one end of the top of the treatment tank (12); The outer side of the stirring shaft (13) is fixedly connected to a plurality of stirring rods (1301); one end of the plurality of stirring rods (1301) away from the stirring shaft (13) is slidably connected to a telescopic rod (1302); an oxygen inlet channel (1303) is provided inside the stirring rod (1301); a main oxygen outlet (1304) is provided at a position corresponding to the oxygen inlet channel (1303) at the bottom end of the stirring rod (1301); the interior of the oxygen inlet pipe (15), the stirring rod (1301) and the telescopic rod (1302) are all connected to the oxygen inlet channel (1303); and the outer sides of the plurality of telescopic rods (1302) are fixedly connected to a plurality of oxygen outlet heads (1305).

2. A staged catalytic wet oxidation sewage treatment device according to claim 1, characterized in that: A telescopic sleeve (1306) is fixedly connected to a position inside the stirring rod (1301) corresponding to the telescopic rod (1302); the telescopic rod (1302) is slidably connected to the telescopic sleeve (1306); and a plurality of groups of first springs (1307) are movably installed inside the telescopic sleeve (1306); a scraper (1308) is fixedly connected to one end of the telescopic rod (1302) away from the stirring rod (1301); and the scraper (1308) is in contact with the inner wall of the processing tank (12).

3. A staged catalytic wet oxidation sewage treatment device according to claim 1, characterized in that: A box cover (1001) is fixedly mounted on the top of the filter box (10), a water inlet pipe (1002) is fixedly connected to the top of the box cover (1001), a water guide hopper (1003) is mounted inside the filter box (10), a filter screen (1004) is fixedly mounted on the bottom end of the water guide hopper (1003), and the bottom end of the filter box (10) is fixedly connected to the input end of the pump (11) via a first connecting pipe (1005).

4. A staged catalytic wet oxidation sewage treatment device according to claim 1, characterized in that: A water receiving pipe (1201) is fixedly installed on the top of the treatment tank (12); the water receiving pipe (1201) is fixedly connected to the output end of the pump (11) via a second connecting pipe (1202); and the second connecting pipe (1202) is provided with a first solenoid valve (1203).

5. A staged catalytic wet oxidation sewage treatment device according to claim 1, characterized in that: A heat-insulating shell (1204) is fixedly mounted on the outside of the processing tank (12), a heat-insulating layer (1205) is formed between the heat-insulating shell (1204) and the processing tank (12), a heater (1206) is fixedly mounted on the bottom end of the heat-insulating shell (1204), and the heater (1206) extends into the interior of the processing tank (12).

6. A staged catalytic wet oxidation sewage treatment device according to claim 5, characterized in that: A serpentine coil (1207) is fixedly connected to the outer wall of the treatment tank (12), and an inlet pipe (1208) and an outlet pipe (1209) are respectively fixedly connected to both ends of the serpentine coil (1207), and the inlet pipe (1208) and the outlet pipe (1209) both extend to the outside of the insulation shell (1204).

7. A staged catalytic wet oxidation sewage treatment device according to claim 1, characterized in that: An inspection cover (1401) is fixedly mounted on the top of the transmission case (14), a drive motor (1402) is fixedly mounted on the right end of the top of the inspection cover (1401), a drive sprocket (1403) is fixedly mounted on the drive end of the drive motor (1402), a drive sprocket (1404) is fixedly mounted on the outer side of the top end of the stirring shaft (13), and the drive sprocket (1404) is connected to the drive sprocket (1404) via a chain (1405).

8. A staged catalytic wet oxidation sewage treatment device according to claim 1, characterized in that: The interior of the oxygen inlet pipe (15) is slidably connected to a movable column (1501), a second spring (1502) is movably mounted on the bottom end of the movable column (1501), a top sheet (1503) is fixedly connected to the top end of the movable column (1501), and a rubber plug (1504) is fixedly connected to the interior of the top sheet (1503).

9. A staged catalytic wet oxidation sewage treatment device according to claim 1, characterized in that: The dosing tube (16) is an inclined square tube, the top of the dosing tube (16) is fixedly connected to a water adding tube (1601), the water adding tube (1601) is provided with a second solenoid valve (1602), the outer side of the dosing tube (16) is threadedly connected to a dosing cap (1603), one end of the dosing tube (16) located inside the treatment tank (12) is fixedly connected to a diverter box (1604), the inner side of the diverter box (1604) is fixedly connected to multiple groups of discharge heads (1605), the inside of the multiple groups of discharge heads (1605) are provided with multiple groups of discharge ports (1606), and the inside of the diverter box (1604) is fixedly connected to multiple groups of slow flow plates (1607).

10. A processing method, characterized in that: A staged catalytic wet oxidation sewage treatment device according to any one of claims 1 to 9, characterized in that it comprises the following steps: S1, introducing the sewage into the filter box (10) for filtration, which can prevent excessive impurities in the sewage from accumulating in the treatment tank (12) and causing residues; S2, transporting the water into the interior of the treatment tank (12) through the pump (11), and introducing the water treatment agent into the treatment tank (12) through the dosing pipe (16); S3, oxygen is introduced through the oxygen inlet pipe (15), then introduced into the interior of the oxygen inlet channel (1303), discharged to the bottom of the treatment tank (12) through the main oxygen outlet (1304), and introduced into the interior of the stirring rod (1301) and the telescopic rod (1302), and finally discharged through multiple sets of oxygen outlet heads (1305), so that the oxygen is fully in contact with the sewage; S4, controlling the stirring shaft (13) to rotate so that the stirring rod (1301) and the telescopic rod (1302) stir the sewage, so that the discharged oxygen further contacts the sewage; S5, heating the sewage to a reaction temperature by means of a heater (1206). Heating can increase the reaction rate, allowing the organic matter to react with oxygen more quickly, thereby improving the treatment efficiency. At the same time, the insulation layer (1205) formed between the insulation shell (1204) and the treatment tank (12) is used for insulation, thereby preventing excessive heat loss and reducing the treatment effect; S6. In the process of heating the sewage by using the heater (1206), since the heating efficiency is limited as the heat rises from the bottom, a heat source such as hot water or hot steam is introduced into the inlet pipe (1208). The heat source is introduced into the serpentine coil (1207) through the inlet pipe (1208). The used heat source is exported through the outlet pipe (1209). The heat source in the serpentine coil (1207) is used to quickly heat the treatment tank (12), so that the sewage inside the treatment tank (12) can be quickly heated.

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