CN220467751U - Device for reducing COD of waste water - Google Patents

Abstract

The application provides a device for reducing waste water COD. The device for reducing the COD of the wastewater comprises an oxidation reaction tower and a stirring mechanism; an oxidation reaction cavity is formed in the oxidation reaction tower; the stirring mechanism comprises a driving assembly, a stirring shaft and a stirring paddle assembly, wherein the power output end of the driving assembly is connected to the stirring shaft, the stirring shaft is rotationally connected to the upper portion of the oxidation reaction tower, at least part of the stirring shaft is located in the oxidation reaction cavity, the stirring paddle assembly is arranged in the oxidation reaction cavity and comprises a first stirring paddle and a second stirring paddle, the first stirring paddle is arranged above the second stirring paddle and comprises a first stirring blade and a first extending portion, the first stirring blade is connected to the stirring shaft, one end of the first extending portion is connected to the first stirring blade, the other end of the first extending portion is lower than the first stirring blade in the vertical direction, and the second stirring paddle is connected to the stirring shaft. The device for reducing the COD of the wastewater has a good COD reducing effect on the wastewater.

Description

Device for reducing COD of waste water

Technical Field

The utility model relates to the technical field of wastewater treatment, in particular to a device for reducing COD (chemical oxygen demand) of wastewater.

Background

Chemical oxygen demand refers to the amount of oxidant consumed when a water sample is treated with a strong oxidant under certain conditions, i.e., an indicator of how much reducing material is in the wastewater. The chemical oxygen demand has the english name Chemical Oxygen Demand, simply COD.

Traditional device for reducing COD plays effect relatively poor to waste water that reduces COD.

For example, chinese patent of patent publication No. CN218262106U proposes a device for degrading waste water COD Fenton oxidation, which comprises a clean water tank and two reaction tanks connected to each other, wherein one reaction tank is connected to the clean water tank, and both reaction tanks are provided with vibrators; when the wastewater is treated, the reagent is added after the wastewater is introduced into the reaction tank, the vibrator is started to vibrate the reaction tank, and then the inside of the reaction tank is vibrated, so that the mixing speed of the reagent and the wastewater is accelerated, and the mixing effect of the wastewater and the reagent is improved.

Although the wastewater in the reaction tank can be mixed with the chemical by the vibration of the vibrator, there are the following problems:

because the total weight of the reaction tank and the wastewater is large, and the volume of the reaction tank is large, when the vibration frequency of the vibrator is low, the chemical agent and the wastewater are difficult to be fully mixed, namely the COD of the wastewater is difficult to be effectively reduced; similarly, when the vibration frequency of the vibrator is high, the vibration amplitude of the reaction tank is easy to incline, part of wastewater overflows out of the reaction tank, the COD of the wastewater is difficult to effectively reduce due to the overflow of the wastewater out of the reaction tank, the ratio of the chemical agent in the reaction tank to the wastewater after the overflow is difficult to control, and the COD of the wastewater is also difficult to effectively reduce.

Disclosure of Invention

The utility model aims to overcome the defects in the prior art and provides a device for reducing the COD of wastewater, which can effectively reduce the COD of wastewater.

The aim of the utility model is realized by the following technical scheme:

an apparatus for reducing waste water COD comprising:

an oxidation reaction tower, wherein an oxidation reaction cavity is formed in the oxidation reaction tower;

the stirring mechanism comprises a driving assembly, a stirring shaft and a stirring paddle assembly, wherein the power output end of the driving assembly is connected to the stirring shaft, the stirring shaft is rotationally connected to the upper portion of the oxidation reaction tower, the stirring shaft is at least partially positioned in the oxidation reaction cavity, the stirring paddle assembly is arranged in the oxidation reaction cavity, the stirring paddle assembly comprises a first stirring paddle and a second stirring paddle, the first stirring paddle is arranged above the second stirring paddle, the first stirring paddle comprises a first stirring blade and a first extending portion, the first stirring blade is connected to the stirring shaft, one end of the first extending portion is connected to the first stirring blade, the other end of the first extending portion is lower than the first stirring blade in the vertical direction, and the second stirring paddle is connected to the stirring shaft.

In one embodiment, the inner peripheral wall of the oxidation reaction tower is provided with a baffle.

In one embodiment, the oxidation reaction tower is provided with a circulating pump, and two ends of the circulating pump are respectively communicated with the oxidation reaction cavity.

In one embodiment, a bottom column is arranged at the bottom of the oxidation reaction tower, and the bottom column is connected to the oxidation reaction tower; a slag discharging port is formed in the bottom of the oxidation reaction tower and is communicated with the oxidation reaction cavity; a water outlet is formed in the lower part of the oxidation reaction tower and is communicated with the oxidation reaction cavity; the oxidation reaction tower is provided with a visual manhole.

In one embodiment, the second stirring paddle comprises a second stirring blade and a second extension part which are connected, and one end of the second extension part, which is away from the second stirring blade, is higher than the second stirring blade; or, the one end that second extension portion deviates from the second stirring leaf is higher than the one end that first extension portion deviates from first stirring leaf, the one end that second extension portion deviates from the second stirring leaf connect in the (mixing) shaft.

In one embodiment, the oxidation reaction cavity comprises a medicine injection stirring cavity and a liquid mixing stirring cavity which are communicated, and the medicine injection stirring cavity is formed above the liquid mixing stirring cavity; the first stirring blade and the first extension part are both arranged in the medicine injection stirring cavity; the second stirring paddle is arranged in the liquid mixing stirring cavity.

In one embodiment, the oxidation reaction tower is provided with a first penetrating hole and a second penetrating hole, the first penetrating hole and the second penetrating hole are both communicated with the oxidation reaction cavity, the first penetrating hole is provided with a water inlet pipe, the second penetrating hole is provided with a medicine injection pipe, the water inlet pipe is provided with a mounting hole, a medicine injection end of the medicine injection pipe is arranged in the mounting hole and communicated with the water inlet pipe, the water inlet pipe is provided with a water inlet, and the water inlet is positioned in the medicine injection stirring cavity and communicated with the medicine injection stirring cavity.

In one embodiment, the device for reducing COD in wastewater further comprises a medicine box, wherein the medicine box is communicated with the medicine injection pipe, and a medicine injection pump is arranged on the medicine injection pipe; the water inlet pipe is provided with a water inlet pump and a water inlet valve.

In one embodiment, the device for reducing COD of the wastewater further comprises a wastewater concentration tank, a pretreatment mechanism and a connecting pipeline, wherein the pretreatment mechanism is respectively communicated with the wastewater concentration tank and the oxidation reaction cavity; the connecting pipeline is respectively communicated with the wastewater concentration tank and the pretreatment mechanism, and a feed pump and a feed valve are arranged on the connecting pipeline.

In one embodiment, the pretreatment machine is configured with a pretreatment cavity which is respectively communicated with the wastewater concentration tank and the oxidation reaction cavity, wherein an interception net and activated carbon are arranged in the pretreatment cavity, and the interception net is arranged above the activated carbon.

Compared with the prior art, the utility model has at least the following advantages:

1. according to the device for reducing COD of the wastewater, one end of the first extension part is connected with the first stirring blade, the other end of the first extension part is lower than the first stirring blade in the vertical direction, so that one end of the first extension part, which is away from the first stirring blade, is lower than the first stirring blade, the length of the first stirring paddle in the height direction is prolonged, namely the stirring depth of the first stirring paddle is increased, and the contact area between the stirring paddle assembly and the wastewater is increased;

2. according to the device for reducing the COD of the wastewater, the space exists between the first stirring blade and the first extension part, the second stirring blade is arranged below the first stirring blade, the space of the oxidation reaction cavity is fully utilized, the contact area between the stirring blade assembly and the wastewater is further increased, the wastewater in the oxidation reaction cavity and the medicament are fully mixed, and the device for reducing the COD of the wastewater has a good COD reducing effect on the wastewater.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present utility model and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic view showing the structure of an apparatus for reducing COD in wastewater according to an embodiment of the present utility model;

FIG. 2 is a partial schematic view of the apparatus for reducing COD in wastewater shown in FIG. 1;

FIG. 3 is a partial schematic view of an apparatus for reducing COD in wastewater according to another embodiment of the utility model;

FIG. 4 is a partial cross-sectional view of the apparatus for reducing COD of wastewater shown in FIG. 1;

FIG. 5 is a partial schematic view of the apparatus for reducing COD in wastewater shown in FIG. 1;

fig. 6 is a partial cross-sectional view of the apparatus for reducing COD of wastewater shown in fig. 1.

Detailed Description

In order that the utility model may be readily understood, a more complete description of the utility model will be rendered by reference to the appended drawings. The drawings illustrate preferred embodiments of the utility model. This utility model may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

It will be understood that when an element is referred to as being "fixed to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. The terminology used herein in the description of the utility model is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.

Referring to fig. 1 to 2 together, an apparatus 10 for reducing COD of wastewater according to an embodiment includes an oxidation reaction tower 100 and a stirring mechanism 300; an oxidation reaction chamber 101 is formed in the oxidation reaction tower 100; the stirring mechanism 300 comprises a driving component 310, a stirring shaft 320 and a stirring paddle component 330, wherein the power output end of the driving component 310 is connected to the stirring shaft 320, the stirring shaft 320 is rotationally connected to the upper part of the oxidation reaction tower 100, the stirring shaft 320 is at least partially positioned in the oxidation reaction cavity 101, the stirring paddle component 330 is arranged in the oxidation reaction cavity 101, the stirring paddle component 330 comprises a first stirring paddle 331 and a second stirring paddle 332, the first stirring paddle 331 is arranged above the second stirring paddle 332, the first stirring paddle 331 comprises a first stirring blade 3311 and a first extension part 3312, the first stirring blade 3311 is connected to the stirring shaft 320, one end of the first extension part 3312 is connected to the first stirring blade 3311, the other end of the first extension part 3312 is lower than the first stirring blade 3311 in the vertical direction, and the second stirring paddle 332 is connected to the stirring shaft 320.

In the device 10 for reducing COD in wastewater, one end of the first extension part 3312 is connected to the first stirring blade 3311, and the other end of the first extension part 3312 is lower than the first stirring blade 3311 in the vertical direction, so that one end of the first extension part 3312, which is away from the first stirring blade 3311, is lower than the first stirring blade 3311, the length of the first stirring blade 331 in the height direction is prolonged, namely the stirring depth of the first stirring blade 331 is increased, and the contact area between the stirring blade assembly 330 and wastewater is increased; there is a space between the first stirring vane 3311 and the first extension 3312, and the second stirring paddle 332 is arranged below the first stirring paddle 331, so that the space of the oxidation reaction cavity 101 is fully utilized, the contact area between the stirring paddle assembly 330 and the wastewater is further increased, the wastewater in the oxidation reaction cavity 101 and the medicament are fully mixed, and the device 10 for reducing the COD of the wastewater has a better COD reduction effect on the wastewater.

Referring to fig. 2, in one embodiment, the number of the first extending portions 3312 is at least two, and at least two first extending portions 3312 are disposed on the first stirring blade 3311 and connected to the first stirring blade 3311, so that the waste water and the chemical agent in the oxidation reaction chamber 101 are sufficiently mixed, and further the COD reducing effect of the device 10 for reducing the COD of the waste water on the waste water is ensured.

Referring to fig. 1 to 2, in one embodiment, an included angle between the first stirring vane 3311 and the first extension 3312 is an obtuse angle. It will be appreciated that the structural strength of the first stirring paddle 331 is improved, and the first extension 3312 extends toward the direction close to the inner peripheral wall of the oxidation reaction tower 100, so that the contact area between the first stirring paddle 331 and the wastewater can be increased, and the device 10 for reducing the COD of the wastewater has a better COD reducing effect on the wastewater.

Referring to fig. 2, in one embodiment, the first mixing blade 3311 and the first extension 3312 form an angle of 110 °.

Referring to fig. 2, in one embodiment, the number of the first stirring blades 3311 is at least two, the at least two first stirring blades 3311 are spaced around the stirring shaft 320, the number of the first extending portions 3312 is at least two, each extending portion is connected to a corresponding first stirring blade 3311, so that the device 10 for reducing COD of wastewater has a better COD reducing effect on wastewater.

Referring to fig. 1, in one embodiment, the inner peripheral wall of the oxidation reaction tower 100 is provided with a baffle 210. It can be appreciated that the mixed solution of wastewater and medicament receives centrifugal force during stirring, the resistance of the baffle 210 can play a buffering role on the mixed solution, so that the problem that the liquid level of the mixed solution at the vortex is lower and the liquid level at the edge is higher is solved, and then the stirring mechanism 300 plays a better stirring role on the mixed solution, and further the device 10 for reducing the COD of the wastewater has a better COD reduction effect on the wastewater.

Referring to fig. 1 and fig. 5 together, in one embodiment, the oxidation reaction tower 100 is provided with a circulation pump 220, and two ends of the circulation pump 220 are respectively connected to the oxidation reaction chamber 101. It will be appreciated that the circulation pump 220 communicates with the oxidation reaction chamber 101, enhances the fluidity of the mixed liquid of wastewater and chemical agent, and further ensures the mixing effect, i.e., improves the COD reducing effect of the apparatus 10 for reducing COD of wastewater on the COD of wastewater.

Referring to fig. 1 and fig. 5 together, in one embodiment, two ends of the circulation pump 220 are respectively connected to the injection stirring cavity 1011 and the mixing stirring cavity 1012, so as to further improve the COD reducing effect of the device 10 for reducing the COD of wastewater on the wastewater.

Referring to fig. 1, in one embodiment, a bottom column 200 is disposed at the bottom of the oxidation reaction tower 100, and the bottom column 200 is connected to the oxidation reaction tower 100. It can be understood that the bottom of the oxidation reaction tower 100 is provided with the slag discharging port 104, and the bottom column 200 is used for supporting the oxidation reaction tower 100, so that personnel can clean the slag discharging port 104 conveniently, and the production convenience is improved.

Referring to fig. 1, in one embodiment, a slag discharging port 104 is formed at the bottom of the oxidation reaction tower 100, and the slag discharging port 104 is connected to the oxidation reaction chamber 101. It will be appreciated that the waste water contains waste residues, part of the waste residues are deposited on the inner peripheral wall of the oxidation reaction chamber 101 and mainly deposited on the bottom wall of the oxidation reaction chamber 101, and the slag discharging port 104 is formed at the bottom of the oxidation reaction tower 100, so that the deposited waste residues are convenient to clean, and the production convenience is improved.

Referring to fig. 1, in one embodiment, a drain 105 is provided at a lower portion of the oxidation reaction tower 100, and the drain 105 is connected to the oxidation reaction chamber 101 for draining water.

Referring to fig. 1, in one embodiment, the drain 105 is disposed away from the bottom of the oxidation reaction chamber 101. It will be appreciated that since the waste water contains waste residues, and part of the waste residues are gradually deposited, the liquid closer to the bottom wall of the oxidation reaction chamber 101 is a liquid with higher solid content, and therefore the drain opening 105 is disposed away from the bottom of the oxidation reaction chamber 101, i.e., the drain opening 105 is disposed at the lower part of the oxidation reaction tower 100 but not at the bottom, so that the water discharged from the drain opening 105 is a liquid with lower solid content.

Referring to fig. 1 and fig. 5, in one embodiment, the oxidation reaction tower 100 is provided with a visible manhole 106, so as to facilitate the observation of the inside of the oxidation reaction tower 100.

Referring to fig. 2, in one embodiment, the driving assembly 310 is a driving motor, and the driving motor drives the stirring shaft 320 and the stirring paddle assembly 330 to rotate.

Referring to fig. 2, in one embodiment, the second stirring paddle 332 includes a second stirring blade 3321 and a second extension portion 3322 connected to each other, and an end of the second extension portion 3322 facing away from the second stirring blade 3321 is higher than the second stirring blade 3321. It can be appreciated that the end of the second extension portion 3322 facing away from the second stirring blade 3321 is higher than the second stirring blade 3321, so that the height of the second stirring blade 332 is increased, the contact area between the stirring blade assembly 330 and the wastewater is increased, the wastewater contains waste residues, and the waste residues are easily deposited in the liquid mixing stirring cavity 1012, so that the second stirring blade 3321 is arranged below the second extension portion 3322, the second stirring blade 3321 is enabled to stir the waste residues sufficiently, further the agent is ensured to perform oxidation reaction on the waste residues sufficiently, and the device 10 for reducing COD of the wastewater has a better COD reducing effect on the wastewater.

Referring to fig. 1 and fig. 3, in one embodiment, an end of the second extension portion 3322 facing away from the second stirring blade 3321 is higher than an end of the first extension portion 3312 facing away from the first stirring blade 3311, and an end of the second extension portion 3322 facing away from the second stirring blade 3321 is connected to the stirring shaft 320. It can be appreciated that the space below the first stirring vane 3311 is fully utilized, the contact area between the stirring paddle assembly 330 and the wastewater is increased, so that the wastewater and the chemical in the oxidation reaction chamber 101 are fully mixed, and the device 10 for reducing COD of the wastewater has a better COD reducing effect on the wastewater.

Referring to fig. 2, in one embodiment, the number of the second stirring blades 3321 is at least two, the at least two second stirring blades 3321 are spaced around the stirring shaft 320, the number of the second extending portions 3322 is at least two, each extending portion is connected to a corresponding second stirring blade 3321, so that the device 10 for reducing COD of wastewater has a better COD reducing effect on wastewater.

Referring to fig. 1, in one embodiment, the oxidation reaction chamber 101 includes a drug injection stirring chamber 1011 and a liquid mixing stirring chamber 1012 which are communicated, and the drug injection stirring chamber 1011 is formed above the liquid mixing stirring chamber 1012; both the first stirring blade 3311 and the first extension 3312 are provided to the injection stirring chamber 1011; the second paddle 332 is disposed in the mixing chamber 1012. It can be understood that the positions where the stirring mechanism 300 can reach in the stirring process are more uniformly distributed in the oxidation reaction tower 100, i.e. the stirring mechanism 300 more fully stirs the liquid in the oxidation reaction tower 100, so that the device 10 for reducing the COD in the wastewater has a better effect of reducing the COD in the wastewater.

Referring to fig. 1 and 6, in one embodiment, the oxidation reaction tower 100 is provided with a first penetrating hole 102 and a second penetrating hole 103, the first penetrating hole 102 and the second penetrating hole 103 are both communicated with the oxidation reaction chamber 101, the first penetrating hole 102 is provided with a water inlet pipe 700a, the second penetrating hole 103 is provided with a drug injection tube 800a, the water inlet pipe 700a is provided with a mounting hole 701, a drug injection end 810 of the drug injection tube 800a is arranged in the mounting hole 701 and is communicated with the water inlet pipe 700a, the water inlet pipe 700a is formed with a water inlet 702, and the water inlet 702 is positioned in the drug injection stirring chamber 1011 and is communicated with the drug injection stirring chamber 1011. It will be appreciated that the chemical injected from the chemical injection end 810 is carried away by the wastewater flowing out from the water inlet pipe 700a, and the impact force of the wastewater causes the chemical to be better dispersed in the wastewater, so that the device 10 for reducing COD in the wastewater has better COD reducing effect on the wastewater.

Referring to fig. 1 and 6 together, in one embodiment, the apparatus 10 for reducing COD of wastewater further includes a medicine tank, which is connected to the medicine injection tube 800a, and the medicine injection tube 800a is provided with a medicine injection pump 800b. It will be appreciated that the cartridge is used to store a medicament and the drug infusion pump 800b is used to deliver the medicament from the drug infusion tube 800a into the oxidation reaction chamber 101.

Referring to fig. 1, in one embodiment, a water inlet pipe 700a is provided with a water inlet pump 700b and a water inlet valve 700c. It will be appreciated that the inlet valve 700c is used to turn on or off the inlet pump 700b to bring the wastewater within the oxidation reaction chamber 101 to a level that is advantageous for production.

Referring to fig. 1, in one embodiment, the apparatus 10 for reducing COD of wastewater further includes a wastewater concentration tank 400, a pretreatment mechanism 500, and a connection pipe 600a, wherein the pretreatment mechanism 500 is respectively connected to the wastewater concentration tank 400 and the oxidation reaction chamber 101; the connection pipe 600a is respectively connected to the wastewater collection tank 400 and the pretreatment mechanism 500, and the connection pipe 600a is provided with a feed pump 600b and a feed valve 600c. It will be appreciated that the wastewater collection tank 400 stores wastewater, and that the wastewater flows from the wastewater collection tank 400 to the connecting pipe 600a, the pretreatment mechanism 500, and the oxidation reaction chamber 101 in this order, and that the pretreatment mechanism 500 is used to pretreat the wastewater, such as filtering particles or other impurities in the wastewater.

Referring to fig. 1 and fig. 4 together, in one embodiment, a pretreatment chamber 501 is formed in the pretreatment mechanism 500, the pretreatment chamber 501 is respectively connected to the wastewater concentration tank 400 and the oxidation reaction chamber 101, an interception net 510 and an activated carbon 520 are disposed in the pretreatment chamber 501, and the interception net 510 is disposed above the activated carbon 520. It will be appreciated that the interception net 510 is used to intercept and filter larger waste in wastewater, and the activated carbon 520 is used to adsorb suspended matter and smaller organic particles.

Referring to fig. 1, in one embodiment, the apparatus 10 for reducing COD of wastewater further includes a connection pipe 600a, the connection pipe 600a is respectively connected to the wastewater concentration tank 400 and the pretreatment mechanism 500, a feed pump 600b and a feed valve 600c are disposed on the connection pipe 600a, and the feed valve 600c is used to turn on or off the feed pump 600b. It will be appreciated that when the feed valve 600c is opened, the feed pump 600b delivers the wastewater in the wastewater collection tank 400 to the pretreatment mechanism 500 through the connection pipe 600 a.

Referring to fig. 1 and 4 together, in one embodiment, a feed valve 600c is opened, a feed pump 600b conveys the wastewater in the wastewater concentration tank 400 into the pretreatment mechanism 500 through a connecting pipe 600a, larger garbage in the wastewater is intercepted and filtered by an interception net 510, organic particles and suspended matters in the wastewater are adsorbed by activated carbon 520, then the wastewater filtered and adsorbed by the pretreatment mechanism 500 is conveyed through a water inlet pipe 700a by a water inlet pump 700b, meanwhile, the medicament in the medicament box is injected into a mounting hole 701 through a medicament injection end 810 by a medicament injection pump 800b, the medicament is dispersed and carried away by the wastewater in the water inlet pipe 700a, a mixed solution of the wastewater and the medicament enters a medicament injection stirring cavity 1011, a first stirring blade 3311 and a first extension 3312 are positioned in the medicament injection stirring cavity 1011, the liquid in the medicament injection stirring cavity 1011 is stirred, and the mixed solution also flows to a mixed solution stirring cavity 1012 and a circulating pump 220, the second stirring blade 3321 and the second extending part 3322 stir the liquid in the mixed liquid stirring cavity 1012, the liquid circulates between the oxidation reaction cavity 101 and the circulating pump 220, the circulating pump 220 is respectively communicated with the upper part and the lower part of the oxidation reaction tower 100, so that the upper liquid and the lower liquid in the oxidation reaction cavity 101 are mixed, the liquid is fully flowed, the waste water and the medicament are fully mixed, the waste water contains waste residues, the waste residues are easily deposited in the mixed liquid stirring cavity 1012, the second stirring blade 3321 is positioned below the second extending part 3322, the second stirring blade 3321 sufficiently stirs the waste residues, the waste water and the medicament are fully mixed, the medicament is fully mixed, the waste water is fully oxidized, namely the medicament oxidizes the reducing substances in the waste water, and the reducing substances in the waste water are well reduced, so that the device 10 for reducing COD in the wastewater has better COD reducing effect on the wastewater; during the production process, personnel can observe the inside of the oxidation reaction tower 100 through the visible manhole 106; the waste water treated by the chemical oxidation reaction is discharged from the discharge port 105, and then a person can enter the oxidation reaction tower 100 through the visible manhole 106 and clean the waste water mixed with the waste residue to the slag discharge port 104, and then discharge the mixture from the slag discharge port 104.

Compared with the prior art, the utility model has at least the following advantages:

1. according to the device 10 for reducing the COD of the wastewater, larger garbage in the wastewater is intercepted and filtered by the interception net 510, and organic particles and suspended matters in the wastewater are adsorbed by the activated carbon 520, so that partial reducing substances in the wastewater are reduced;

2. the medicine injection pump 800b injects the medicine in the medicine box into the mounting hole 701 through the medicine injection end 810, and the waste water in the water inlet pipe 700a breaks up and takes away the medicine, so that the mixing effect of the waste water and the medicine is ensured;

3. the liquid circulates between the oxidation reaction chamber 101 and the circulating pump 220, and the circulating pump 220 is respectively communicated with the upper part and the lower part of the oxidation reaction tower 100, so that the upper layer liquid and the lower layer liquid in the oxidation reaction chamber 101 are mixed, the liquid is ensured to flow more fully, and the wastewater and the medicament are ensured to be fully mixed;

4. the first stirring vane 3311 and the first extending part 3312 are located in the medicine injection stirring cavity 1011 and stir the liquid in the medicine injection stirring cavity 1011, and the second stirring vane 3321 and the second extending part 3322 stir the liquid in the mixed liquid stirring cavity 1012, so that the liquid in the oxidation reaction cavity 101 is sufficiently stirred, and further, the device 10 for reducing the COD of the wastewater is ensured to have a better COD reducing effect on the wastewater.

The above examples illustrate only a few embodiments of the utility model, which are described in detail and are not to be construed as limiting the scope of the utility model. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model. Accordingly, the scope of protection of the present utility model is to be determined by the appended claims.

Claims (10)

1. An apparatus (10) for reducing the COD of wastewater, comprising:

an oxidation reaction tower (100), wherein an oxidation reaction cavity (101) is formed in the oxidation reaction tower (100);

rabbling mechanism (300), rabbling mechanism (300) include drive assembly (310), (320) and stirring rake subassembly (330), the power take off end of drive assembly (310) connect in (320) stirring axle, (320) rotate connect in the upper portion of oxidation reaction tower (100), (320) are located at least partly in oxidation reaction chamber (101), stirring rake subassembly (330) set up in oxidation reaction chamber (101), stirring rake subassembly (330) include first stirring rake (331) and second stirring rake (332), first stirring rake (331) set up in the top of second stirring rake (332), first stirring rake (331) include first stirring vane (3311) and first extension (3312), first stirring vane (3311) connect in (320), one end of first extension (3312) connect in first stirring vane (331) in the vertical direction of rotation (332), first extension (3312) are in first stirring vane (3311).

2. The apparatus (10) for reducing COD of wastewater according to claim 1, wherein the inner peripheral wall of the oxidation reaction tower (100) is provided with a baffle plate (210).

3. The apparatus (10) for reducing COD of wastewater according to claim 1, wherein the oxidation reaction tower (100) is provided with a circulation pump (220), and both ends of the circulation pump (220) are respectively communicated with the oxidation reaction chamber (101).

4. The apparatus (10) for reducing waste water COD according to claim 1, wherein a bottom of the oxidation reaction tower (100) is provided with a bottom column (200), the bottom column (200) being connected to the oxidation reaction tower (100);

a slag discharging port (104) is formed in the bottom of the oxidation reaction tower (100), and the slag discharging port (104) is communicated with the oxidation reaction cavity (101);

a water outlet (105) is formed in the lower part of the oxidation reaction tower (100), and the water outlet (105) is communicated with the oxidation reaction cavity (101);

the oxidation reaction tower (100) is provided with a visual manhole (106).

5. The device (10) for reducing waste water COD according to claim 1, wherein the second stirring paddle (332) comprises a second stirring blade (3321) and a second extension (3322) connected, the second extension (3322) having an end facing away from the second stirring blade (3321) higher than the second stirring blade (3321); or, one end of the second extending part (3322) deviating from the second stirring blade (3321) is higher than one end of the first extending part (3312) deviating from the first stirring blade (3311), and one end of the second extending part (3322) deviating from the second stirring blade (3321) is connected to the stirring shaft (320).

6. The device (10) for reducing waste water COD according to claim 1, wherein the oxidation reaction chamber (101) comprises a drug injection stirring chamber (1011) and a liquid mixing stirring chamber (1012) which are communicated, the drug injection stirring chamber (1011) being formed above the liquid mixing stirring chamber (1012);

the first stirring blade (3311) and the first extension part (3312) are arranged in the medicine injection stirring cavity (1011);

the second stirring paddle (332) is arranged in the liquid mixing stirring cavity (1012).

7. The device (10) for reducing waste water COD according to claim 6, wherein the oxidation reaction tower (100) is provided with a first penetrating hole (102) and a second penetrating hole (103), the first penetrating hole (102) and the second penetrating hole (103) are both communicated with the oxidation reaction chamber (101), the first penetrating hole (102) is provided with a water inlet pipe (700 a), the second penetrating hole (103) is provided with a medicine injection pipe (800 a), the water inlet pipe (700 a) is provided with a mounting hole (701), a medicine injection end (810) of the medicine injection pipe (800 a) is arranged in the mounting hole (701) and is communicated with the water inlet pipe (700 a), and the water inlet pipe (700 a) is provided with a water inlet (702), and the water inlet (702) is positioned in the medicine injection stirring chamber (1011) and is communicated with the medicine injection stirring chamber (1011).

8. The device (10) for reducing waste water COD according to claim 7, wherein the device (10) for reducing waste water COD further comprises a medicine box, the medicine box is communicated with the medicine injection tube (800 a), and a medicine injection pump (800 b) is arranged on the medicine injection tube (800 a);

the water inlet pipe (700 a) is provided with a water inlet pump (700 b) and a water inlet valve (700 c).

9. The apparatus (10) for reducing waste water COD according to claim 1, wherein the apparatus (10) for reducing waste water COD further comprises a waste water concentration tank (400), a pretreatment mechanism (500) and a connecting pipe (600 a), the pretreatment mechanism (500) being respectively communicated with the waste water concentration tank (400) and the oxidation reaction chamber (101); the connecting pipeline (600 a) is respectively communicated with the wastewater concentration tank (400) and the pretreatment mechanism (500), and a feed pump (600 b) and a feed valve (600 c) are arranged on the connecting pipeline (600 a).

10. The device (10) for reducing waste water COD according to claim 9, wherein the pretreatment mechanism (500) is formed with a pretreatment chamber (501), the pretreatment chamber (501) is respectively communicated with the waste water concentration tank (400) and the oxidation reaction chamber (101), an interception net (510) and activated carbon (520) are arranged in the pretreatment chamber (501), and the interception net (510) is arranged above the activated carbon (520).