CN114538596B - Heterogeneous Fenton wastewater treatment device - Google Patents
Heterogeneous Fenton wastewater treatment device Download PDFInfo
- Publication number
- CN114538596B CN114538596B CN202210281454.5A CN202210281454A CN114538596B CN 114538596 B CN114538596 B CN 114538596B CN 202210281454 A CN202210281454 A CN 202210281454A CN 114538596 B CN114538596 B CN 114538596B
- Authority
- CN
- China
- Prior art keywords
- area
- water
- distribution
- distribution area
- wastewater treatment
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/725—Treatment of water, waste water, or sewage by oxidation by catalytic oxidation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J8/00—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes
- B01J8/18—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with fluidised particles
- B01J8/1872—Details of the fluidised bed reactor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J8/00—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes
- B01J8/18—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with fluidised particles
- B01J8/24—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with fluidised particles according to "fluidised-bed" technique
- B01J8/34—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with fluidised particles according to "fluidised-bed" technique with stationary packing material in the fluidised bed, e.g. bricks, wire rings, baffles
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/40—Devices for separating or removing fatty or oily substances or similar floating material
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/722—Oxidation by peroxides
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2201/00—Apparatus for treatment of water, waste water or sewage
- C02F2201/002—Construction details of the apparatus
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
- C02F2301/04—Flow arrangements
- C02F2301/046—Recirculation with an external loop
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2305/00—Use of specific compounds during water treatment
- C02F2305/02—Specific form of oxidant
- C02F2305/026—Fenton's reagent
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Combustion & Propulsion (AREA)
- Analytical Chemistry (AREA)
- Treatment Of Water By Oxidation Or Reduction (AREA)
Abstract
The invention provides a heterogeneous Fenton wastewater treatment device, which comprises: the reactor shell is internally and sequentially divided into a water distribution area, a filling area, a separation area and a clear water area from bottom to top; the first distribution area is provided with a hydrogen peroxide adding port and is connected into the filler area through a pipeline; the second distribution area is provided with a ferrous sulfate feeding port and a wastewater inlet and is connected into the water distribution area through a pipeline; wherein, the pipelines of the first distribution area and the second distribution area are respectively provided with a circulating pump, a supporting plate through which water can flow is arranged between the water distribution area and the filling area, and the filling area is filled with catalyst filling; a slag discharging system and a sprayer are arranged above the clear water area. The device can avoid the problem of self quenching of hydroxyl radicals caused by simultaneous mixing of a large amount of hydrogen peroxide and ferrous sulfate, can activate the wastewater in advance, effectively improve the utilization efficiency of hydrogen peroxide, prevent the degradation of water outlet caused by accumulation of scum and froth, and ensure the wastewater treatment effect.
Description
Technical Field
The invention relates to the technical field of wastewater treatment, in particular to a heterogeneous Fenton wastewater treatment device.
Background
The heterogeneous Fenton oxidation technology has the same principle as the traditional Fenton reagent oxidation technology, and hydrogen peroxide (H 2 O 2 ) Catalytic decomposition to generate hydroxyl free radical (OH) with strong non-selective oxidizing ability, thereby initiating free radical reaction and degrading organic matters. Iron-containing solid catalyst for heterogeneous Fenton oxidation replaces dissolved Fe added in traditional Fenton reagent oxidation 2+ Water pollutants and H 2 O 2 The molecules diffuse to the active center of the solid phase catalyst surface and then H 2 O 2 Under the catalysis of the solid phase catalyst, the organic matter is produced and oxidized and degraded. Compared with the traditional Fenton reagent oxidation technology, the heterogeneous Fenton oxidation greatly reduces Fe 2+ Is added to reduce the sludge yieldThe pH range of the reaction is expanded, and the method is widely applied to the treatment of wastewater, especially the degradation-resistant wastewater.
At present, heterogeneous Fenton oxidation can be divided into a fluidized bed and a fixed bed according to the existence form of the catalyst in the reactor, wherein the heterogeneous Fenton fluidized bed reaction device increases the contact probability with pollutants and oxidants in water because the catalyst is in a fluidized state in the reactor, improves the mass transfer efficiency, ensures that the oxidant is distributed more uniformly, and has higher reaction efficiency. At present, the catalyst fluidization is realized by increasing internal circulation by adopting higher rising flow rate brought by pressurized water flow or adopting an aeration mode. However, the existing heterogeneous Fenton fluidized bed reaction device has more defects, such as a great amount of scum and froth existing in the effluent of the heterogeneous Fenton fluidized bed reaction device in the wastewater treatment process, which affects the subsequent wastewater treatment effect; the problems of large usage amount of the reaction reagent and low utilization efficiency are present.
Disclosure of Invention
The invention aims to provide a heterogeneous Fenton wastewater treatment device, which solves the problem of low utilization efficiency of reaction agents in the prior art, can activate wastewater in advance, avoids the problem of self quenching of hydroxyl radicals caused by simultaneous mixing of a large amount of hydrogen peroxide and ferrous sulfate, can effectively improve the utilization efficiency of hydrogen peroxide, and improves the wastewater treatment effect.
In order to achieve the above purpose, the invention adopts the following technical scheme:
a heterogeneous Fenton wastewater treatment device, comprising:
the reactor comprises a reactor shell, wherein the reactor shell is internally and sequentially divided into a water distribution area, a filling area, a separation area and a clear water area from bottom to top;
the first distribution area is provided with a hydrogen peroxide adding port and is connected into the filler area through a pipeline;
the second distribution area is provided with a ferrous sulfate feeding port and a wastewater inlet, and is connected into the water distribution area through a pipeline;
the circulating pumps are arranged on the pipelines of the first distribution area and the second distribution area, a supporting plate through which water can pass is arranged between the water distribution area and the filling area, and catalyst filling is filled in the filling area.
In one embodiment of the present application, a perforated water distribution pipe is disposed in the water distribution area, and the perforated water distribution pipe is connected with the second distribution area through a pipeline.
In one embodiment of the present application, a distribution pipe is disposed in the water distribution area, the distribution pipe is connected with the first distribution area through a pipe, a plurality of in-line water distribution pipes are disposed on the distribution pipe, and a plurality of in-line water distribution pipes penetrate through the bearing plate and enter the filling area.
In one embodiment of the present application, the support plate is provided with water passing holes, the opening positions of the water passing holes are lower than the openings of the in-line water distribution pipes, water distribution caps are arranged on the openings, and the pore diameters of the water distribution holes on the water distribution caps are smaller than the particle diameters of the catalyst fillers.
In one embodiment of the present application, the first distribution area and the second distribution area are both disposed at the upper portion of the reactor housing and are respectively communicated with the clean water area through the distribution area water passing openings.
In one embodiment of the present application, the first distribution area and the second distribution area are both provided with distribution area baffles, the upper portions of the distribution area baffles are provided with water permeable openings, and the pore diameters of the water permeable openings are smaller than the particle diameters of the catalyst filler.
In one embodiment of the present application, a perforated water collecting pipe is arranged in the clear water zone, and is immersed in the clear water zone and communicated with the water outlet at the upper part of the reactor shell.
In one embodiment of the present application, a reflective plate is disposed within the separation zone for intercepting catalyst packing that overflows the packing zone.
In one embodiment of the present application, the slag discharging system further comprises a slag discharging system, wherein the slag discharging system comprises:
the slag scraping paddle is positioned at the upper part of the clear water area;
the motor is positioned at the upper part of the slag scraping paddle and is in driving connection with the slag scraping paddle;
the slag discharge groove is positioned at the lower part of the slag scraping paddle, and an opening of the slag discharge groove is matched with the lower part of the slag scraping paddle and is used for collecting scum;
the slag discharging port is arranged at one end of the slag discharging groove and is connected to the outer side of the reactor shell.
In one embodiment of the present application, a sprayer is further included, the sprayer being located at an end of the slag discharge chute remote from the slag discharge port.
Compared with the prior art, the invention has the beneficial effects that:
1. when the existing heterogeneous Fenton fluidized bed adopts an internal circulation reflux mode to fluidize a catalyst, hydrogen peroxide and ferrous sulfate required by the reaction are added into a water distribution area of the reactor at the same time, a large amount of oxidants enter at one time, a large amount of hydroxyl free radicals (OH) can be generated in a short time, the hydroxyl free radicals (OH) can not fully react with main organic matters, part of the hydroxyl free radicals can be quenched, and the problem of low utilization efficiency of medicaments exists. The heterogeneous Fenton wastewater treatment device is provided with two distribution areas, ferrous sulfate and wastewater are mixed in the second distribution area, so that the wastewater is activated in advance and then enters the water distribution area at the bottom of the reactor shell, and hydrogen peroxide is diluted in the first distribution area and then directly enters the filling area; the wastewater activated by ferrous sulfate passes through the bearing plate from the lower water distribution area to enter the filler area to be mixed with hydrogen peroxide for reaction, and the mixing and water distribution mode can avoid the problem that a great amount of hydrogen peroxide is mixed with ferrous sulfate simultaneously to cause the self quenching of hydroxyl radicals, thereby improving the reaction efficiency and the utilization rate of medicaments.
2. The device adopts the form of a fluidized bed, and utilizes the backflow water provided by a circulating pump to form higher rising flow rate in the reactor, so that the catalyst in a filling area is in a fluidized state, and the reaction efficiency is improved; the reflux water is reasonably distributed, so that water is saved, and all functional areas are arranged in the reactor shell along the vertical direction, so that space and occupied area are saved.
3. When a catalyst is initially put into a conventional heterogeneous Fenton reactor or certain waste water which possibly generates a large amount of gas, such as waste water containing sulfides, lipids, surfactants and the like, a large amount of microbubbles are generated in the reactor, and the microbubbles can be wrapped by suspended matters in water and part of the fine catalyst to form scum or froth, so that the water yield is deteriorated; if the effluent contains a large amount of scum and froth, the flocculation effect can be influenced in the subsequent pH adjustment and flocculation processes of the reaction, so that a large amount of microbubbles are wrapped in the formed sludge flocs to influence the settleability of the sludge, cause the floating of the sludge in a sedimentation tank, and the like, and influence the wastewater treatment effect. The slag discharging system is arranged on the upper portion of the clear water area, scum and froth generated in the reaction process can be timely and effectively removed, water outflow degradation caused by accumulation of the scum and the froth is prevented, subsequent pH adjustment, flocculation and sedimentation caused by water outflow of a large amount of scum or bubbles is avoided, and wastewater treatment effect is guaranteed.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of the overall structure of a heterogeneous Fenton wastewater treatment device in the invention.
Fig. 2 is a schematic top view of the slag discharging system according to the present invention.
FIG. 3 is a schematic view of a perforated water distribution pipe according to an embodiment of the present invention.
Fig. 4 is a schematic structural diagram of another embodiment of the perforated water distribution pipe in the present invention.
Reference numerals:
1. a reactor housing; 11. a water distribution area; 12. a filler zone; 121. a bearing plate; 1211. a water passing hole; 13. a separation zone; 131. a reflection plate; 14. a clear water zone; 141. perforating a water collecting pipe; 142. a water outlet;
2. a first distribution area; 21. a hydrogen peroxide adding port; 22. a distribution area water passing port; 23. a distribution area baffle; 231. a water permeable port;
3. a second distribution zone; 31. a ferrous sulfate feeding port; 32. a wastewater inlet;
4. a circulation pump;
5. perforating a water distribution pipe;
6. a dispensing tube; 61. a water distribution pipe in line; 611. a water distribution cap;
7. slag scraping paddles; 71. a motor;
8. a slag discharge groove; 81. a slag discharge port;
9. and a sprayer.
Detailed Description
Hereinafter, only certain exemplary embodiments are briefly described. As will be recognized by those of skill in the pertinent art, the described embodiments may be modified in various different ways without departing from the spirit or scope of the present invention. Accordingly, the drawings and description are to be regarded as illustrative in nature and not as restrictive.
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, or orientations or positional relationships conventionally placed in use of the product of the present invention, or orientations or positional relationships conventionally understood by those skilled in the art, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention.
The terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present invention, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
The terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; the device can be mechanically connected, electrically connected and communicated; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
In the present invention, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.
The following disclosure provides many different embodiments, or examples, for implementing different features of the invention. In order to simplify the present disclosure, components and arrangements of specific examples are described below. They are, of course, merely examples and are not intended to limit the invention.
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
As shown in fig. 1, an embodiment of the present invention provides a heterogeneous Fenton wastewater treatment apparatus, which includes: a reactor shell 1, a first distribution area 2, a second distribution area 3, a slag discharging system and the like.
Wherein, the inside of the reactor shell 1 is sequentially provided with a water distribution area 11, a filling area 12, a separation area 13 and a clear water area 14 from bottom to top. A supporting plate 121 is arranged between the water distribution area 11 and the packing area 12, the packing area 12 is filled with catalyst packing, the supporting plate 121 is used for supporting the catalyst packing, water can flow through the supporting plate 121, namely, water in the water distribution area 11 can pass through the supporting plate 121 and enter the packing area 12.
The first distribution area 2 is used for preparing hydrogen peroxide solution and is added into the reactor shell 1. Specifically, a hydrogen peroxide adding port 21 is arranged on the first distribution area 2 and is used for adding medicament hydrogen peroxide; the lower part of the first distribution area 2 is provided with an outlet which is connected to the packing area 12 in the reactor shell 1 through a pipe, and hydrogen peroxide is directly sent to the packing area 12 for reaction treatment.
The upper part of the second distribution area 3 is provided with a ferrous sulfate feeding port 31 and a wastewater inlet 32, and the outlet of the lower part is connected into the water distribution area 11 in the reactor shell 1 through a pipeline. Ferrous sulfate is mixed with wastewater to be treated in the second distribution area 3 and is sent into the water distribution area 11 through a pipeline, the wastewater to be treated is activated in advance through the ferrous sulfate, then passes through the bearing plate 121 and enters the filler area 12 to be mixed with hydrogen peroxide for reaction, and the problems that a large amount of hydroxyl free radicals (OH) are generated in a short time, the hydroxyl free radicals (OH) quench themselves, and the hydrogen peroxide utilization rate is reduced can be effectively avoided.
The circulating pump 4 is arranged on the pipeline connected with the outlets of the first distribution area 2 and the second distribution area 3, the circulating pump 4 provides higher ascending flow rate for water flow and catalyst, ensures that the catalyst in the filling area 12 is in a fluidized state, can improve the contact probability of the medicament (hydrogen peroxide and ferrous sulfate) and pollutants, and improves the reaction efficiency and the utilization rate of the medicament.
In one embodiment, a perforated water distribution pipe 5 and a distribution pipe 6 are arranged in the water distribution area 11, and the perforated water distribution pipe 5 is positioned at the bottom and connected with the circulating pump 4 and the outlet at the lower part of the second distribution area 3 through pipelines. As shown in fig. 3, the perforated water distribution pipe 5 may be composed of a plurality of concentric annular pipes connected by a straight pipe; or as shown in fig. 4, the perforated water distribution pipe 5 is composed of a plurality of straight pipes which are communicated in a radial cross manner, and a plurality of water outlet small holes are uniformly distributed on the pipe body and used for uniformly dispersing the wastewater to be treated mixed with ferrous sulfate into the water distribution area 11.
The distribution pipe 6 is located in the water distribution area 11 and above the perforated water distribution pipe 5. The distribution pipe 6 is connected via a pipe to the circulation pump 4 and to the outlet of the first distribution zone 2. A plurality of straight water distribution pipes 61 are uniformly distributed on the distribution pipe 6, the lengths of the straight water distribution pipes 61 are consistent, and the straight water distribution pipes vertically penetrate through the bearing plate 121 and extend into the filling area 12. The distribution pipe 6 may be formed by connecting a plurality of concentric annular pipes to a straight pipe, or by connecting a plurality of straight pipes in a radial direction. The distributing pipe 6 is arranged in the water distribution area 11, the in-line water distribution pipe 61 is inserted into the filler area 12 from bottom to top, and the hydrogen peroxide solution is directly dispersed and pumped into the filler area 12, so that the hydrogen peroxide and the ferrous sulfate are uniformly mixed in the filler area to react with pollutants; the distributing pipe 6 is not directly arranged in the packing region 12, so that the influence on the liquid fluidization state in the packing region 12 is reduced, the water distribution is more uniform, and the contact reaction is more sufficient.
In one embodiment, the supporting plate 121 is uniformly provided with a plurality of water passing holes 1211, and the water passing holes 1211 and the in-line water distribution pipes 61 are uniformly arranged in an interposed manner. The height of the water distribution pipe 61 is higher than the height of the water passing holes 1211 (namely, the opening position of the water distribution pipe 61 is higher than the opening position of the Yu Guoshui holes 1211), the length of the water distribution pipe 61 inserted into the filling area is controlled to be 2 cm-50 cm, and the length of the water distribution pipe 61 is preferably 30cm, so that hydrogen peroxide can better contact with the catalyst filling, generated hydroxyl free radicals (OH) are uniformly dispersed, and the hydrogen peroxide can be replaced to contact with pollutants in water.
Water distribution caps 611 are arranged on the water passing holes 1211 and the in-line water distribution pipes 61, a plurality of water distribution holes are uniformly distributed on the water distribution caps 611, and the pore diameter of the water distribution holes is smaller than the particle diameter of the catalyst filler. The catalyst filler is spherical or irregular filler with the particle size of 0.2 mm-8.0 mm. Preferably, the catalyst filler is a spherical filler having a diameter of 3.0 mm.
Of course, the carrier plate 121 may not have water holes, and the carrier plate 121 may be a mesh plate having a mesh diameter smaller than the catalyst filler particle diameter.
In one embodiment, the first distribution zone 2 and the second distribution zone 3 are respectively arranged at two sides outside the upper part of the reactor shell 1 or in the clean water zone 14 in the upper part of the reactor shell 1 and are respectively communicated with the clean water zone 14 through distribution zone water ports 22 on the side wall of the clean water zone 14. The water flow after the fluidization degradation treatment can flow back to the first distribution area 2 and the second distribution area 3 through the water port 22 of the distribution area, and is respectively mixed with hydrogen peroxide or ferrous sulfate, and is pumped into the filling area 12 or the water distribution area 11 through the circulating pump 4. The reflux water can dilute the hydrogen peroxide in the first distribution area 2, so that the hydroxyl radical quenching caused by mixing a large amount of hydrogen peroxide with ferrous sulfate is avoided; the circulating pump 4 forms higher ascending flow rate in the reactor by utilizing the backflow water, ensures that the catalyst in the filling area is in a fluidized state, improves the reaction efficiency, and avoids other water flow from being introduced.
Further, the first distribution area 2 and the second distribution area 3 are respectively provided with a distribution area baffle 23, the upper half part of the distribution area baffle 23 is provided with a water permeable opening, the aperture of the water permeable opening is smaller than the particle size of the catalyst filler, and the catalyst filler is prevented from entering the first distribution area 2 or the second distribution area 3.
A perforated water collecting pipe 141 is arranged in the clean water zone 14, the perforated water collecting pipe 141 is communicated with a water outlet 142 at the upper part of the reactor shell 1, and the perforated water collecting pipe 141 is immersed under the water surface of the clean water zone 14 and is used for extracting and discharging clean water after catalytic reaction treatment. The position of the water outlet 142 should be higher than the perforated water collecting pipe 141, and the water outlet 142 is preferably 10 cm-80 cm above the perforated water collecting pipe 141. The water outlet 142 is preferably arranged at a position of about 50cm above the perforated water collecting pipe 141, so that clean water can be well extracted and discharged, and scum and froth are not easy to discharge.
A plurality of reflecting plates 131 are arranged in the separation area 13, and the reflecting plates 131 can be inverted V-shaped baffles which are arranged at intervals and in a layered mode and are used for intercepting catalyst filler overflowed from the filler area 12 and incompletely preventing scum and froth from rising so as to ensure the normal operation of the device.
As shown in fig. 1 and 2, the device further comprises a slag discharging system arranged at the upper part of the reactor shell 1, wherein the slag discharging system comprises a slag scraping paddle 7, a motor 71, a slag discharging groove 8, a slag discharging opening 81, a sprayer 9 and the like.
The slag scraping paddle 7 is arranged on the upper portion of the clear water area 14, the upper portion of the slag scraping paddle 7 is in driving connection with the motor 71, a scraping blade is arranged on the lower side of the slag scraping paddle 7, and the scraping blade is adapted to the water surface position of the clear water area 14.
The slag discharge groove 8 is fixedly arranged in the clear water area 14, is positioned in the middle of the water surface of the clear water area 14, has an upper opening corresponding to the lower part of the slag scraping paddle 7, and can hang scum and froth on the water surface of the clear water area 14 into the slag discharge groove 8 by driving the slag scraping paddle 7 to rotate by the motor 71. One end of the slag discharging groove 8 is provided with a slag discharging hole 81, the slag discharging hole 81 is connected to the outer side of the reactor shell 1, and the scum and the floating foam collected by the slag discharging groove 8 are discharged through the slag discharging hole 81.
Further, the slag discharging system also comprises a sprayer 9, wherein a spray head of the sprayer 9 is arranged in an opening at the upper side of the slag discharging groove 8 and is positioned at one end of the slag discharging groove 8 away from the slag discharging port 81. The scum and froth on the water surface of the clear water area 14 are scraped into the slag discharging groove 8 by the rotation of the slag scraping paddle 7, and are sprayed with water flow through the sprayer 9, and the scum and froth are timely flushed to the slag discharging port 81 to be discharged out of the reactor shell 1. The method avoids the deterioration of the effluent caused by the accumulation of scum and floating foam, reduces the amount of scum or bubbles wrapped by the effluent, ensures the treatment effect of the subsequent pH adjustment, flocculation and sedimentation processes, and ensures the wastewater treatment quality.
The heterogeneous Fenton wastewater treatment device is used for treating wastewater, and comprises the following steps:
the wastewater to be treated enters the second distribution area 3 from the wastewater inlet 32, is mixed with the backwater water in the clean water area 14 and the ferrous sulfate added from the ferrous sulfate adding port 31, and the wastewater after mixed activation enters the water distribution area 2 of the reactor shell 1 from the perforated water distribution pipe 5 through the corresponding circulating pump 4 and uniformly enters the filling area 12 through the water passing holes 1211 on the bearing plate 121.
Meanwhile, the backwater water in the clear water zone 14 enters the first distribution zone 2, is mixed with the hydrogen peroxide added by the hydrogen peroxide adding port 21, and enters the filling zone 12 through the distribution pipe 6 and the in-line water distribution pipe 61 by the corresponding circulating pump 4; and the water enters the filler zone 12 from the water holes 1211 of the bearing plate 121 and the heterogeneous catalyst filler in the filler zone 12 are subjected to catalytic oxidation reaction to degrade pollutants in the water.
The reacted wastewater enters a separation area 13, and a small amount of catalyst filler doped in the wastewater is intercepted by a reflecting plate 131 in the separation area 13 and falls back into a filler area 12; the wastewater passes through the separation zone 13 and then enters the upper clean water zone 14 and then exits the reactor housing 1 through a perforated water collection pipe 141 submerged in the clean water zone 14 from a water outlet 142.
The scum and froth existing in the clear water area 14 gradually gather on the upper layer of the water surface due to lighter specific gravity, the scum and froth are hung in the slag discharging groove 8 by the rotating scum scraping paddles 7, and the flushing liquid sprayed by the sprayer 13 is flushed out by the slag discharging opening 81.
In summary, the heterogeneous Fenton wastewater treatment device adopts a fluidized bed mode, and the reflux water provided by the circulating pump 4 forms higher ascending flow rate in the reactor shell 1, so that the catalyst in the packing area 12 is in a fluidized state, and the reaction efficiency is improved; each functional area is arranged in the reactor shell 1 along the vertical direction, so that the occupied area is saved;
the first distribution area 2 and the second distribution area 3 are arranged so that ferrous sulfate and hydrogen peroxide are respectively mixed with backwater water, and wastewater is mixed with ferrous sulfate in the second distribution area 3 so that wastewater to be treated is activated in advance. The backwater water mixed with the raw water and the ferrous sulfate enters the water distribution area 11 through the perforated water distribution pipe 5 and then uniformly enters the filler area 12 through the water holes 1211 of the bearing plate 121. The backwater water mixed with hydrogen peroxide directly enters the packing region 12 through the in-line water distribution pipe 61. By adopting the mixing and water distribution mode, the problem of self quenching of hydroxyl radicals caused by simultaneous mixing of a large amount of hydrogen peroxide and ferrous sulfate is avoided, so that the device has uniform water distribution, full reaction and high medicament utilization rate.
Claims (7)
1. A heterogeneous Fenton wastewater treatment device, comprising:
the reactor comprises a reactor shell, wherein the reactor shell is internally and sequentially divided into a water distribution area, a filling area, a separation area and a clear water area from bottom to top;
the first distribution area is provided with a hydrogen peroxide adding port and is connected into the filler area through a pipeline;
the second distribution area is provided with a ferrous sulfate feeding port and a wastewater inlet, and is connected into the water distribution area through a pipeline;
the circulating pumps are arranged on the pipelines of the first distribution area and the second distribution area, a supporting plate through which water can pass is arranged between the water distribution area and the filling area, and catalyst filling is filled in the filling area;
a distribution pipe is arranged in the water distribution area and is connected with the first distribution area through a pipeline, a plurality of in-line water distribution pipes are arranged on the distribution pipe, and the in-line water distribution pipes penetrate through the bearing plate and enter the filling area;
the water passing holes and the in-line water distribution pipes are uniformly distributed and arranged in an interposed mode, the opening positions of the water passing holes are lower than the openings of the in-line water distribution pipes, water distribution caps are arranged on the openings, and the pore diameters of the water distribution holes on the water distribution caps are smaller than the particle size of the catalyst filler;
the first distribution area and the second distribution area are both arranged at the upper part of the reactor shell and are respectively communicated with the clear water area through the water passing ports of the distribution areas.
2. The heterogeneous Fenton wastewater treatment device according to claim 1, wherein a perforated water distribution pipe is arranged in the water distribution area and is connected with the second distribution area through a pipeline.
3. The heterogeneous Fenton wastewater treatment device according to claim 1, wherein distribution area baffles are arranged in the first distribution area and the second distribution area, water permeable openings are arranged on the upper portions of the distribution area baffles, and the pore diameter of the water permeable openings is smaller than the particle diameter of the catalyst filler.
4. The heterogeneous Fenton wastewater treatment device according to claim 1, wherein a perforated water collecting pipe is arranged in the clear water zone, and is immersed in the clear water zone and communicated with a water outlet at the upper part of the reactor shell.
5. The heterogeneous Fenton wastewater treatment device according to claim 1, wherein a reflecting plate is arranged in the separation zone and is used for intercepting catalyst packing overflowing the packing zone.
6. The heterogeneous Fenton wastewater treatment device of claim 1, further comprising a slag removal system comprising:
the slag scraping paddle is positioned at the upper part of the clear water area;
the motor is positioned at the upper part of the slag scraping paddle and is in driving connection with the slag scraping paddle;
the slag discharge groove is positioned at the lower part of the slag scraping paddle, and an opening of the slag discharge groove is matched with the lower part of the slag scraping paddle and is used for collecting scum;
the slag discharging port is arranged at one end of the slag discharging groove and is connected to the outer side of the reactor shell.
7. A heterogeneous Fenton wastewater treatment device according to claim 6, further comprising a sprayer located at an end of the slag chute remote from the slag discharge port.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210281454.5A CN114538596B (en) | 2022-03-22 | 2022-03-22 | Heterogeneous Fenton wastewater treatment device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210281454.5A CN114538596B (en) | 2022-03-22 | 2022-03-22 | Heterogeneous Fenton wastewater treatment device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114538596A CN114538596A (en) | 2022-05-27 |
| CN114538596B true CN114538596B (en) | 2023-04-28 |
Family
ID=81666544
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210281454.5A Active CN114538596B (en) | 2022-03-22 | 2022-03-22 | Heterogeneous Fenton wastewater treatment device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114538596B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115108611B (en) * | 2022-08-02 | 2024-02-06 | 江苏省环境工程技术有限公司 | Multi-source multiphase catalytic advanced oxidation coupling reaction device and method for high-efficiency treatment of industrial wastewater |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0910787A (en) * | 1995-04-27 | 1997-01-14 | Chiyoda Corp | Fluidized bed type waste water treatment method and apparatus |
| KR20040084586A (en) * | 2003-03-25 | 2004-10-06 | 손을택 | Treatment method of wastewater containing recalcitrant compounds and apparatus therefor |
| CN101041475A (en) * | 2007-03-09 | 2007-09-26 | 华南理工大学 | Fenton and air-float integral water treating method |
| CN202717623U (en) * | 2012-08-15 | 2013-02-06 | 天津市联合环保工程设计有限公司 | Integrated Fenton reaction unit |
| CN104193114A (en) * | 2014-09-18 | 2014-12-10 | 广东溢达纺织有限公司 | Sewage treatment method and sewage treatment system |
| CN206767690U (en) * | 2017-06-05 | 2017-12-19 | 青岛新世纪环境工程有限公司 | A kind of ozone air-float reactor |
| CN108585164A (en) * | 2018-03-23 | 2018-09-28 | 华夏碧水环保科技有限公司 | A kind of processing method of Fenton catalyst oxidation reactor and its highly difficult industrial wastewater |
| KR101957444B1 (en) * | 2018-07-30 | 2019-03-12 | (주)정우기연 | Oh-ladical floating separation type water purification system using micro-bubble and oh-radical |
Family Cites Families (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0668244A1 (en) * | 1994-02-18 | 1995-08-23 | National Research Development Corporation | Effluent treatment involving electroflotation |
| CN101519251B (en) * | 2009-04-09 | 2010-11-10 | 广西大学 | Process for treating bio-refractory waste water by up-flow multi-phase oxidation column |
| CN201495112U (en) * | 2009-07-30 | 2010-06-02 | 江苏八达科技有限公司 | Lower-layer floatation scum scraping-and-discharging device |
| CN203346139U (en) * | 2013-06-28 | 2013-12-18 | 河南中烟工业有限责任公司 | Automatic deslagging device for coagulation reaction zone of coagulation flotation tank |
| CN103553200B (en) * | 2013-11-15 | 2015-03-04 | 山东省环境保护科学研究设计院 | Fenton oxidation wastewater treatment method and system |
| CN103755007B (en) * | 2014-02-19 | 2015-07-08 | 南京大学 | Fenton fluidized bed treatment device and waste water treatment method thereof |
| CN205500883U (en) * | 2016-04-07 | 2016-08-24 | 长沙威保特环保科技股份有限公司 | A heterogeneous catalytic ozonation tower for sewage treatment |
| CN106587447B (en) * | 2016-12-06 | 2020-01-07 | 西安建筑科技大学 | Electric induction coagulation ozone air flotation-catalytic oxidation multi-element coupling water treatment system and method |
| CN107162158B (en) * | 2017-07-20 | 2024-02-27 | 山东山大华特环保科技有限公司 | Fenton fluidized bed reactor and method |
| CN212770040U (en) * | 2020-05-23 | 2021-03-23 | 杭州绿夏环境科技有限公司 | External circulation composite catalytic oxidation reactor |
| CN213977104U (en) * | 2020-12-17 | 2021-08-17 | 沈阳信成环境技术有限公司 | Energy-efficient fenton fluidized bed |
| CN214457088U (en) * | 2020-12-21 | 2021-10-22 | 广州益方田园环保股份有限公司 | Fluidized bed oxidation tower |
| CN214299457U (en) * | 2020-12-28 | 2021-09-28 | 江苏贞一环保科技股份有限公司 | Heterogeneous fluidized bed catalytic oxidation equipment |
-
2022
- 2022-03-22 CN CN202210281454.5A patent/CN114538596B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0910787A (en) * | 1995-04-27 | 1997-01-14 | Chiyoda Corp | Fluidized bed type waste water treatment method and apparatus |
| KR20040084586A (en) * | 2003-03-25 | 2004-10-06 | 손을택 | Treatment method of wastewater containing recalcitrant compounds and apparatus therefor |
| CN101041475A (en) * | 2007-03-09 | 2007-09-26 | 华南理工大学 | Fenton and air-float integral water treating method |
| CN202717623U (en) * | 2012-08-15 | 2013-02-06 | 天津市联合环保工程设计有限公司 | Integrated Fenton reaction unit |
| CN104193114A (en) * | 2014-09-18 | 2014-12-10 | 广东溢达纺织有限公司 | Sewage treatment method and sewage treatment system |
| CN206767690U (en) * | 2017-06-05 | 2017-12-19 | 青岛新世纪环境工程有限公司 | A kind of ozone air-float reactor |
| CN108585164A (en) * | 2018-03-23 | 2018-09-28 | 华夏碧水环保科技有限公司 | A kind of processing method of Fenton catalyst oxidation reactor and its highly difficult industrial wastewater |
| KR101957444B1 (en) * | 2018-07-30 | 2019-03-12 | (주)정우기연 | Oh-ladical floating separation type water purification system using micro-bubble and oh-radical |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114538596A (en) | 2022-05-27 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101781036B (en) | Equipment and method for treating nondegradable wastewater by utilizing catalytic oxidation of ozone | |
| US11926549B2 (en) | Treatment process and treatment system of enhanced up-flow multiphase wastewater oxidation | |
| CN114538596B (en) | Heterogeneous Fenton wastewater treatment device | |
| CN211226732U (en) | Ozone catalytic oxidation sewage treatment equipment | |
| CN112624303A (en) | Microbubble supercharging circulation ozone catalytic oxidation reaction device | |
| JPH1190496A (en) | Apparatus and method for ozone treatment of biological sludge | |
| JP4884737B2 (en) | Liquid processing equipment | |
| CN212151913U (en) | Fenton oxidation tower sewage treatment plant | |
| CN211521886U (en) | Micro-electrolysis sewage treatment equipment | |
| CN212450793U (en) | Ozone catalytic oxidation device for wastewater treatment | |
| CN215886498U (en) | Oil refining wastewater treatment device and system | |
| JP5380239B2 (en) | Waste water treatment apparatus and waste water treatment method using catalyst | |
| KR102581817B1 (en) | Advanced wastewater treatment apparatus comprising floating filter tank capable of monitoring | |
| CN217202336U (en) | Efficient ozone dissolved gas oxidation advanced treatment system for sewage | |
| CN216236452U (en) | Ozone advanced oxidation water treatment equipment | |
| CN116002911A (en) | Combined ozone catalytic oxidation water purification device and raw water purification method | |
| CN211946421U (en) | Three-phase Fenton fluidized bed oxidation system | |
| CN208732705U (en) | A kind of micro-nano aeration and catalyzing ozonisation wastewater treatment equipment | |
| CN110577261B (en) | Reaction device for iron-carbon micro-electrolysis | |
| CN111732183A (en) | Device and method for treating sewage by catalytic oxidation of ozone | |
| CN110981044A (en) | Catalytic reduction reactor for wastewater pretreatment, wastewater pretreatment system and process thereof | |
| CN110615521A (en) | Ozone catalytic oxidation tank for treating wastewater | |
| CN115490328B (en) | Built-in denitrification fluidization device | |
| CN217202212U (en) | High-salt organic wastewater ozone catalytic oxidation system | |
| CN218465640U (en) | Synergistic catalytic oxidation reaction device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |