CN219031959U - High CODcr and/or high salt wastewater treatment system - Google Patents
High CODcr and/or high salt wastewater treatment system Download PDFInfo
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- CN219031959U CN219031959U CN202223576610.5U CN202223576610U CN219031959U CN 219031959 U CN219031959 U CN 219031959U CN 202223576610 U CN202223576610 U CN 202223576610U CN 219031959 U CN219031959 U CN 219031959U
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Abstract
The utility model relates to wastewater treatment equipment, and discloses a high CODcr and/or high-salt wastewater treatment system. The treatment system comprises a pretreatment unit, a Fenton reaction unit, an adsorption precipitation unit and a purification treatment unit; the pretreatment unit comprises a primary sedimentation tank, the adsorption sedimentation unit comprises a primary sedimentation tank, an adsorption tank and a secondary sedimentation tank which are sequentially connected, the water inlet of the Fenton reaction unit is connected with the water outlet of the primary sedimentation tank, the water outlet is connected with the water inlet of the primary sedimentation tank, and the water outlet of the secondary sedimentation tank is connected with the purification treatment unit; the primary sedimentation tank is provided with an iron mud outlet, and the iron mud outlet is connected with the primary sedimentation tank and the secondary sedimentation tank through an iron mud conveying unit. The treatment system can realize the recycling of Fenton reaction iron mud, and effectively reduces the wastewater treatment cost.
Description
Technical Field
The utility model relates to wastewater treatment equipment, in particular to a high CODcr and/or high salt wastewater treatment system.
Background
Along with the continuous promotion of environmental protection industry, the emission standard of various pollutants in industrial wastewater is increasingly strict, however, the industrial wastewater generally contains a large amount of organic matters which have complex components, various types and difficult biodegradation, and the purification treatment difficulty is high. Taking the production of polyvinyl alcohol (polyvinyl alcohol or vinyl alcohol polymer, PVA) as an example, in the production process, waste water which is difficult to biochemically treat is produced in the synthesis, rectification and alcoholysis processes, for example, the waste water has strong acidity/strong alkalinity, higher organic matter content, CODcr more than or equal to 5000mg/L and higher conductivity (such as conductivity more than or equal to 20000 mu s/cm), and belongs to waste water with high CODcr, high salt and strong acid/alkali. The PVA production wastewater mainly contains pollutant components such as aldehydes, alcohols, polyvinyl alcohol, methyl acetate and the like, and inorganic components such as sulfate, phosphate and the like, and the wastewater contains a small amount of macromolecular organic matter-PVA, so that the wastewater is difficult to directly treat by a biochemical treatment mode or a membrane treatment mode.
The Fenton process can oxidize and degrade various organic matters, and is widely applied to remove refractory organic matters in industrial wastewater such as PVA production wastewater and the like, and improve the biodegradability of the wastewater. However, when the industrial wastewater adopts Fenton catalytic oxidation technology to degrade organic matters, a large amount of iron mud is generated, and the defects of difficult treatment and high cost exist; the adsorption precipitation process matched with the method needs to consume the adsorbent continuously, and generates a large amount of solid waste. In addition, the Fenton process and the reaction tank adopted by adsorption precipitation have the defects of short residence time and poor treatment effect on wastewater.
Disclosure of Invention
The utility model aims to solve the technical problem of providing a treatment system for high CODcr and/or high-salt wastewater, which can realize the recycling of Fenton reaction iron mud and effectively reduce wastewater treatment cost.
In order to achieve the above object, the present utility model provides a treatment system for high-CODcr and/or high-salt wastewater, comprising a pretreatment unit, a Fenton reaction unit, an adsorption precipitation unit and a purification treatment unit; the pretreatment unit comprises a primary sedimentation tank, the adsorption sedimentation unit comprises a primary sedimentation tank, an adsorption tank and a secondary sedimentation tank which are sequentially connected, the water inlet of the Fenton reaction unit is connected with the water outlet of the primary sedimentation tank, the water outlet is connected with the water inlet of the primary sedimentation tank, and the water outlet of the secondary sedimentation tank is connected with the purification treatment unit; the primary sedimentation tank is provided with an iron mud outlet, and the iron mud outlet is connected with the primary sedimentation tank and the secondary sedimentation tank through an iron mud conveying unit.
Preferably, the Fenton reaction unit comprises a pH adjusting tank, a ferrite mixing tank, an oxidation reaction tank, a neutralization tank and a degassing tank which are sequentially connected, wherein a water inlet of the pH adjusting tank is connected with a water outlet of the primary sedimentation tank, and a water outlet of the degassing tank is connected with a water inlet of the primary sedimentation tank.
More preferably, at least one first mixing guide plate and at least one second mixing guide plate which are arranged at intervals with the first mixing guide plate are arranged in the ferrite mixing tank, one end of the first mixing guide plate is connected with the top of the ferrite mixing tank, the other end of the first mixing guide plate is connected with the bottom of the ferrite mixing tank to form a mixing guide channel, and one end of the second mixing guide plate is connected with the bottom of the ferrite mixing tank, and the other end of the second mixing guide plate is connected with the top of the ferrite mixing tank to form a mixing guide channel.
Further preferably, the first mixing baffle and the second mixing baffle are respectively provided with a mixing turbulence structure extending towards the water inlet end of the ferrite mixing tank.
Specifically, the oxidation reaction tank includes first oxidation pond and the second oxidation pond of setting side by side, the delivery port in first oxidation pond with the water inlet in second oxidation pond is connected, first oxidation pond with in the second oxidation pond from the water inlet end to the play water end have set gradually oxidation agitator and oxidation water conservancy diversion subassembly.
More specifically, the oxidation guide assembly comprises at least one first oxidation guide plate and at least one second oxidation guide plate which is arranged at intervals with the first oxidation guide plate, one end of the first oxidation guide plate is connected with the top of the oxidation reaction tank, an oxidation guide channel is formed between the other end of the first oxidation guide plate and the bottom of the oxidation reaction tank, one end of the second oxidation guide plate is connected with the bottom of the oxidation reaction tank, and an oxidation guide channel is formed between the other end of the second oxidation guide plate and the top of the oxidation reaction tank.
Typically, the first oxidation baffle and the second oxidation baffle are respectively provided with an oxidation turbulence structure.
As a preferred embodiment, the pretreatment unit further comprises a pre-regulating tank, wherein a water outlet of the pre-regulating tank is connected with a water inlet of the primary sedimentation tank, and a grid is arranged on a water inlet pipeline of the pre-regulating tank; the purification treatment unit comprises a biochemical treatment device and/or a multistage evaporation device.
Preferably, the adsorption tank comprises an adsorption stirring area and an adsorption area which are sequentially arranged from a water inlet end to a water outlet end, an overflow channel is formed between at least one side wall of the adsorption area and the adsorption stirring area, and an aeration structure is arranged at the bottom of the adsorption area.
Specifically, the iron mud conveying unit comprises a conveying main pipeline connected with an iron mud outlet, a first conveying branch connected with the primary sedimentation tank, a second conveying branch connected with the secondary sedimentation tank and a third conveying branch connected with the mud treatment unit, wherein the first conveying branch, the second conveying branch and the third conveying branch are connected with the conveying main pipeline and are respectively provided with a valve and a conveying pump, and a mud outlet of the secondary sedimentation tank is connected with the mud treatment unit.
Through the technical scheme, the high CODcr and/or high-salt wastewater treatment system provided by the utility model utilizes the pretreatment unit, the Fenton reaction unit and the adsorption precipitation unit to treat wastewater, so that the wastewater is suitable for entering the purification treatment unit to carry out biochemical treatment or evaporation purification treatment; and the iron sediment generated by the Fenton reaction unit is subjected to self-flocculation in the primary sedimentation tank to form iron mud, and the iron mud is recycled to the primary sedimentation tank and the secondary sedimentation tank through the iron mud conveying unit to be used as a sedimentation tank auxiliary agent, so that on one hand, the Fenton iron mud generated by the treatment system is recycled and comprehensively utilized, and on the other hand, the dosage of flocculant/coagulant aid in the primary sedimentation tank and the secondary sedimentation tank is reduced, and the running cost of the treatment system for treating wastewater is reduced.
Additional features and advantages of the utility model will be set forth in the detailed description which follows.
Drawings
The accompanying drawings are included to provide a further understanding of the utility model, and are incorporated in and constitute a part of this specification, illustrate the utility model and together with the description serve to explain, without limitation, the utility model. In the drawings:
FIG. 1 is a schematic diagram of one embodiment of a high CODcr and/or high salt wastewater treatment system of the present utility model;
FIG. 2 is a schematic structural view of an embodiment of a mixing tank for ferrous salts in accordance with the present utility model;
FIG. 3 is a top view of the ferrite bead of FIG. 2;
FIG. 4 is a schematic view showing the structure of an embodiment of an oxidation reaction tank according to the present utility model;
FIG. 5 is a top view of the oxidation reaction cell shown in FIG. 4;
FIG. 6 is a schematic diagram of an embodiment of an adsorption precipitation unit according to the present utility model;
FIG. 7 is a top view of one embodiment of an adsorption cell of the present utility model.
Description of the reference numerals
1-a pretreatment unit, 11-a pre-regulating tank and 12-a primary sedimentation tank;
2-Fenton reaction unit, 21-pH adjusting tank, 22-ferrite mixing tank, 221-first mixing guide plate, 222-second mixing guide plate, 223-mixing guide channel, 23-oxidation reaction tank, 231-first oxidation tank, 232-second oxidation tank, 233-oxidation stirrer, 234-first oxidation guide plate, 235-second oxidation guide plate, 236-oxidation guide channel, 24-neutralization tank, 25-degassing tank;
3-adsorption and precipitation units, 31-primary sedimentation tanks, 311-iron sludge outlets, 32-adsorption tanks, 321-adsorption stirring areas, 322-adsorption areas, 323-adsorption stirrers, 33-secondary sedimentation tanks, 331-sedimentation stirring areas, 332-sedimentation areas and 333-sedimentation stirrers;
4-purifying treatment unit, 41-biochemical treatment device, 42-multistage evaporation device;
the system comprises a 5-iron sludge conveying unit, a 51-conveying main pipeline, a 52-first conveying branch, a 53-second conveying branch and a 54-third conveying branch;
6-mud treatment unit.
Detailed Description
The following describes specific embodiments of the present utility model in detail with reference to the drawings. It should be understood that the detailed description and specific examples, while indicating and illustrating the utility model, are not intended to limit the utility model.
It should be understood that, for convenience in describing the present utility model and simplifying the description, the terms "top and bottom" refer to the up-down direction of each reaction tank in the processing system, "front" refer to the water inlet end of each reaction tank in the processing system, "rear" refer to the water outlet end of each reaction tank in the processing system, and "left and right" refer to both sides in the front-rear direction; the terms are based on the orientation or positional relationship shown in the drawings and do not indicate or imply that the apparatus or device in question must have a particular orientation, be constructed and operate in a particular orientation and therefore should not be construed as limiting the utility model.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated, and thus, features defining "first," "second," or the like, may explicitly or implicitly include one or more of such features.
The utility model provides a treatment system of high CODcr and/or high salt wastewater, which is shown in figure 1, and comprises a pretreatment unit 1, a Fenton reaction unit 2, an adsorption precipitation unit 3 and a purification treatment unit 4; the pretreatment unit 1 comprises a primary sedimentation tank 12, the adsorption sedimentation unit 3 comprises a primary sedimentation tank 31, an adsorption tank 32 and a secondary sedimentation tank 33 which are sequentially connected, the water inlet of the Fenton reaction unit 2 is connected with the water outlet of the primary sedimentation tank 12, the water outlet is connected with the water inlet of the primary sedimentation tank 31, and the water outlet of the secondary sedimentation tank 33 is connected with the purification treatment unit 4; the primary sedimentation tank 31 is provided with an iron mud outlet 311, and the iron mud outlet 311 is connected with the primary sedimentation tank 12 and the secondary sedimentation tank 33 through an iron mud conveying unit 5.
The treatment system for the high CODcr and/or high salt wastewater provided by the utility model can be suitable for treating the high CODcr and/or high salt industrial wastewater or domestic wastewater and the like, and the treatment process comprises the following steps: the wastewater sequentially enters a primary sedimentation tank 12, a Fenton reaction unit 2, a primary sedimentation tank 31, an adsorption tank 32 and a secondary sedimentation tank 33 of an adsorption sedimentation unit 3 of a pretreatment unit 1 for treatment, so that the wastewater treated by the secondary sedimentation tank 33 is suitable for biochemical treatment or evaporative purification treatment in a purification treatment unit 4; meanwhile, the iron sediment generated by the Fenton reaction unit 2 is subjected to self-flocculation in the primary sedimentation tank 31 to form iron mud, and the iron mud is recycled to the primary sedimentation tank 12 and the secondary sedimentation tank 33 through the iron mud conveying unit 5 to be used as a sedimentation tank auxiliary agent, so that on one hand, the Fenton iron mud generated by the treatment system is recycled and comprehensively utilized, on the other hand, the dosage of flocculating agent/coagulant aid in the primary sedimentation tank 12 and the secondary sedimentation tank 33 is reduced, and the running cost of the treatment system for treating wastewater is reduced.
In the present utility model, the Fenton reaction unit 2 can adopt a conventional Fenton reaction device to perform Fenton reaction treatment on wastewater, wherein the Fenton reaction treatment refers to the utilization of Fe under an acidic condition 2+ And H 2 O 2 The reaction generates hydroxyl free radical with strong oxidability to oxidize organic compounds in the wastewater into CO 2 And H 2 O, further degrading organic matters in the wastewater, regulating the solution to be neutral or weak alkaline by adding alkali into the effluent after Fenton reaction treatment, and adding a certain flocculant (such as strong alkali) to enable iron to be Fe (OH) 3 Form (B) of (B) and filtering Fe (OH) 3 Separated from the solution, since a large amount of Fe is also present in the system after Fenton reaction 3+ Ions, and then a large amount of iron-containing sludge is generated, namely the iron sludge of Fenton reaction.
As a preferred embodiment of the Fenton reaction unit 2, the Fenton reaction unit 2 comprises a pH adjusting tank 21, a ferrite mixing tank 22, an oxidation reaction tank 23, a neutralization tank 24 and a degassing tank 25 which are sequentially connected, wherein a water inlet of the pH adjusting tank 21 is connected with a water outlet of the primary sedimentation tank 12, and a water outlet of the degassing tank 25 is connected with a water inlet of the primary sedimentation tank 31 so as to sequentially perform the treatment processes of adjusting the pH of wastewater to be acidic, mixing with ferrite, oxidizing reaction, alkali neutralization and aeration and degassing, so that the effluent water of the degassing tank 25 can be subjected to self-flocculation in the primary sedimentation tank 31 to obtain iron mud sediment.
As a preferred embodiment of the ferrite-mixing tank 22 according to the present utility model, referring to fig. 2 and 3, at least one first mixing baffle 221 and at least one second mixing baffle 222 spaced apart from the first mixing baffle 221 are disposed in the ferrite-mixing tank 22, one end of the first mixing baffle 221 is connected to the top of the ferrite-mixing tank 22, a mixing guide channel 223 is formed between the other end and the bottom of the ferrite-mixing tank 22, one end of the second mixing baffle 222 is connected to the bottom of the ferrite-mixing tank 22, and a mixing guide channel 223 is formed between the other end of the second mixing baffle 222 and the top of the ferrite-mixing tank 22. By arranging the first mixing guide plates 221 and the second mixing guide plates 222 which are arranged in a staggered manner in the ferrite mixing tank 22, a bent wastewater channel is formed in the ferrite mixing tank 22, so that the residence time of wastewater in the ferrite mixing tank 22 is prolonged, the wastewater and the ferrite in the ferrite mixing tank 22 are convenient to fully mix, and the mixing uniformity is improved. The first mixing baffle 221 and the second mixing baffle 222 may be respectively 1, 2 or more, so that the two may be arranged at intervals to achieve the flow guiding effect.
In the present utility model, the first mixing baffle 221 and the second mixing baffle 222 may be vertically or diagonally disposed baffles, respectively. Preferably, the first mixing baffle 221 and the second mixing baffle 222 are respectively provided with a mixing turbulence structure, so that the wastewater generates mixed flow motion in multiple directions when flowing in the ferrite mixing tank 22, and the effect of fully mixing the wastewater and the ferrite can be further improved. The mixing turbulence structures may be one or more turbulence structures extending toward either side provided at the middle and/or end portions of the first mixing baffle 221 and the second mixing baffle 222, for example, referring to fig. 2, the mixing turbulence structures are provided as flaps located at the end portions of the two mixing baffles and extending toward the water inlet end of the ferrite mixing tank 22.
As a preferred embodiment of the oxidation reaction tank 23 in the present utility model, referring to fig. 4 and 5, the oxidation reaction tank 23 includes a first oxidation tank 231 and a second oxidation tank 232 arranged in parallel, a water outlet of the first oxidation tank 231 is connected with a water inlet of the second oxidation tank 232, and an oxidation stirrer 233 and an oxidation diversion assembly are sequentially arranged in the first oxidation tank 231 and the second oxidation tank 232 from a water inlet end to a water outlet end. The parallel arrangement means that the water inlet end of the first oxidation tank 231 is adjacent to the water outlet end of the second oxidation tank 232, and the water outlet end of the first oxidation tank 231 is adjacent to the water inlet end of the second oxidation tank 232, so as to form two-stage reaction tanks connected in series, so that Fenton reaction is more sufficient; the oxidation stirrer 233 can accelerate the mixing rate of the effluent of the ferrite mixing tank 22 and the oxidant in the oxidation reaction tank 23, so that the efficiency of the oxidation reaction is improved; the arrangement of the oxidation diversion component prolongs the residence time of the wastewater in the oxidation reaction tank 23 and improves the sufficiency of the oxidation reaction.
In the present utility model, the oxidation diversion assembly may adopt any structure capable of prolonging the flow time of the wastewater in the oxidation reaction tank 23. Preferably, the oxidation diversion assembly comprises at least one first oxidation diversion plate 234 and at least one second oxidation diversion plate 235 which is arranged at intervals with the first oxidation diversion plate 234, wherein one end of the first oxidation diversion plate 234 is connected with the top of the oxidation reaction tank 23, an oxidation guide channel 236 is formed between the other end of the first oxidation diversion plate and the bottom of the oxidation reaction tank 23, one end of the second oxidation diversion plate 235 is connected with the bottom of the oxidation reaction tank 23, and an oxidation guide channel 236 is formed between the other end of the second oxidation diversion plate 235 and the top of the oxidation reaction tank 23.
In the present utility model, the first oxidation baffle 234 and the second oxidation baffle 235 may be vertically or diagonally disposed baffles, respectively. Preferably, the first oxidation baffle 234 and the second oxidation baffle 235 are respectively provided with an oxidation turbulence structure, so that mixed flow motion in multiple directions is generated when the wastewater flows in the oxidation reaction tank 23, the effect of fully mixing the wastewater and the oxidant can be further improved, and the oxidation reaction efficiency is improved. The oxidation turbulence structures may be one or more turbulence structures extending toward either side disposed at the middle and/or end portions of the first and second oxidation baffles 234, 235, for example, referring to fig. 4, the oxidation turbulence structures (e.g., flaps) on the first oxidation baffle 234 are located at the end portions thereof and extend toward the water outlet end of the first or second oxidation tank 231, 232, and the oxidation turbulence structures (e.g., flaps) on the second oxidation baffle 235 are located at the end portions thereof and extend toward the water inlet end of the first or second oxidation tank 231, 232.
Referring to fig. 1, as a preferred embodiment of the pretreatment unit 1 in the present utility model, the pretreatment unit 1 further comprises a pre-conditioning tank 11, a water outlet of the pre-conditioning tank 11 is connected with a water inlet of a primary sedimentation tank 12, a grille is arranged on a water inlet pipe of the pre-conditioning tank 11 to filter primary wastewater by the grille and intercept large particulate matters, and the pre-conditioning tank 11 equalizes water quality by aerating the wastewater, thereby ensuring stability of subsequent treatment and improving treatment efficiency.
Referring to fig. 1, in the present utility model, the purification treatment unit 4 includes a biochemical treatment device 41 and/or a multi-stage evaporation device 42, and the effluent of the adsorption precipitation unit 3 can be directly introduced into the biochemical treatment device 41 of the sewage plant or the effluent produced by the multi-stage evaporation device 42 can be used as circulating water for water replenishment according to the purpose of the produced water of the purification treatment unit 4; the biochemical treatment device 41 may be implemented by a biochemical system (hydrolysis acidification+contact oxidation) and a reclaimed water recycling system, and the multistage evaporation device 42 may be implemented by condensate as circulating water for water replenishment and distillation residues as hazardous waste treatment.
In the utility model, referring to fig. 6, the primary sedimentation tank 31, the adsorption tank 32 and the secondary sedimentation tank 33 of the adsorption sedimentation unit 3 are preferably in a self-flowing serial connection mode (such as overflow mode), so that the occupied area can be effectively saved. As a preferred embodiment of the adsorption tank 32, as shown in fig. 6 and 7, the adsorption tank 32 includes an adsorption stirring zone 321 and an adsorption zone 322 sequentially arranged from a water inlet end to a water outlet end, an overflow channel is formed between at least one side wall of the adsorption zone 322 and the adsorption stirring zone 321, and an aeration structure is arranged at the bottom of the adsorption zone 322 to promote rapid mixing reaction. The adsorption tank 32 is internally provided with an adsorption stirring area 321 and an adsorption area 322 through a partition board, the adsorption stirring area 321 is internally provided with a corresponding adsorption stirrer 323 for carrying out slow mixing stirring, the uniformity of wastewater entering the adsorption area 322 is improved, and wastewater after the action of the adsorption stirring area 321 overflows from an overflow channel to enter the adsorption area 322 for adsorption to remove impurities in the wastewater. Illustratively, as shown in fig. 7, the adsorption stirring zone 321 extends to both sides of the adsorption zone 322 to form a U-like structure to form overflow channels at both top ends of the adsorption zone 322. As shown in fig. 6, the effluent in the adsorption zone 322 also enters the secondary sedimentation tank 33 in an overflow manner, and the height of the overflow plate between the adsorption zone 322 and the secondary sedimentation tank 33 should be higher than the height of the overflow plate between the adsorption zone 322 and the adsorption stirring zone 321, so as to avoid that the water in the adsorption stirring zone 321 directly enters the secondary sedimentation tank 33 without being adsorbed.
As a preferred embodiment of the secondary sedimentation tank 33, the secondary sedimentation tank 33 includes a sedimentation stirring zone 331 and a sedimentation zone 332 which are sequentially arranged from the water inlet end to the water outlet end, and a sedimentation stirrer 333 is arranged in the sedimentation stirring zone 331 to rapidly stir the entered wastewater and auxiliary agent for full mixing, and the wastewater in the sedimentation stirring zone 331 enters the sedimentation zone 332 in an overflow manner for sedimentation.
Referring to fig. 1 and 6, as a preferred embodiment of the iron mud conveying unit 5, the iron mud conveying unit 5 includes a conveying main pipe 51 connected to an iron mud outlet 311, a first conveying branch 52 connected to the primary sedimentation tank 12, a second conveying branch 53 connected to the secondary sedimentation tank 33, and a third conveying branch 54 connected to the mud processing unit 6, and valves and conveying pumps are provided on the first conveying branch 52, the second conveying branch 53, and the third conveying branch 54, respectively, and a mud outlet of the secondary sedimentation tank 33 is connected to the mud processing unit 6. At this time, the iron mud conveying unit 5 can not only convey a part of the iron mud in the primary sedimentation tank 31 to the primary sedimentation tank 12 and the secondary sedimentation tank 33 for recycling, but also input a part of the iron mud in the primary sedimentation tank 31 to the mud treatment unit 6 for treatment.
In the present utility model, the sludge treatment unit 6 may be a concentration tank, a dewatering device, etc. to concentrate and dewater a part of the iron sludge and the sludge generated in the secondary sedimentation tank 33, and then to recycle the sludge as solid waste; the sludge treatment unit 6 can also adopt a device for preparing the composite adsorbent by taking the iron sludge generated by the primary sedimentation tank 31 and the sludge generated by the secondary sedimentation tank 33 as raw materials, so that not only can the iron sludge generated by the primary sedimentation tank 31 and the sludge generated by the secondary sedimentation tank 33 be recycled, but also the composite adsorbent can be recycled to the adsorption tank 32, and the resource recycling is realized.
As a relatively preferred embodiment of the treatment system for high CODcr and/or high salt wastewater in the present utility model, see fig. 1 to 7, comprising a pretreatment unit 1, a Fenton reaction unit 2, an adsorption precipitation unit 3, a purification treatment unit 4 and an iron sludge conveying unit 5; the pretreatment unit 1 comprises a pre-regulating tank 11 and a primary sedimentation tank 12, wherein a water outlet of the pre-regulating tank 11 is connected with a water inlet of the primary sedimentation tank 12, and a grid is arranged on a water inlet pipeline of the pre-regulating tank 11; the Fenton reaction unit 2 comprises a pH adjusting tank 21, a ferrite mixing tank 22, an oxidation reaction tank 23, a neutralization tank 24 and a degassing tank 25 which are sequentially connected, wherein a water inlet of the pH adjusting tank 21 is connected with a water outlet of the primary sedimentation tank 12, two first mixing guide plates 221 and two second mixing guide plates 222 which are arranged at intervals with the first mixing guide plates 221 are arranged in the ferrite mixing tank 22, one end of the first mixing guide plates 221 is connected with the top of the ferrite mixing tank 22, a mixing guide channel 223 is formed between the other end of the first mixing guide plates 221 and the bottom of the ferrite mixing tank 22, one end of the second mixing guide plates 222 is connected with the bottom of the ferrite mixing tank 22, a mixing guide channel 223 is formed between the other end of the second mixing guide plates 222 and the top of the ferrite mixing tank 22, the end parts of the first mixing guide plates 221 and the second mixing guide plates 222 are provided with mixing turbulence structures which extend towards the water inlet ends of the ferrite mixing tank 22, the oxidation reaction tank 23 comprises a first oxidation tank 231 and a second oxidation tank 232 which are arranged in parallel, a water outlet of the first oxidation tank 231 is connected with a water inlet of the second oxidation tank 232, an oxidation stirrer 233 and an oxidation flow guide assembly are sequentially arranged in the first oxidation tank 231 and the second oxidation tank 232 from a water inlet end to a water outlet end, the oxidation flow guide assembly comprises a first oxidation flow guide plate 234 and a second oxidation flow guide plate 235, one end of the first oxidation flow guide plate 234 is connected with the top of the oxidation reaction tank 23, an oxidation guide channel 236 is formed between the other end of the first oxidation flow guide plate 234 and the bottom of the oxidation reaction tank 23, an oxidation flow guide channel 236 is formed between one end of the second oxidation flow guide plate 235 and the top of the oxidation reaction tank 23, an oxidation flow guide structure extending towards the water outlet end of the first oxidation tank 231 or the second oxidation tank 232 is arranged at the end of the first oxidation flow guide plate 234, the end of the second oxidation guide plate 235 is provided with an oxidation turbulence structure extending towards the water inlet end of the first oxidation tank 231 or the second oxidation tank 232; the adsorption sedimentation unit 3 comprises a primary sedimentation tank 31, an adsorption tank 32 and a secondary sedimentation tank 33 which are sequentially connected in a self-flowing manner, a water outlet of the degassing tank 25 is connected with a water inlet of the primary sedimentation tank 31, an iron mud outlet 311 is arranged on the primary sedimentation tank 31, the adsorption tank 32 comprises an adsorption stirring area 321 and an adsorption area 322 which are sequentially arranged from a water inlet end to a water outlet end, a corresponding adsorption stirrer 323 is arranged in the adsorption stirring area 321, the adsorption stirring area 321 extends to two sides of the adsorption area 322 to form a U-shaped structure so as to form overflow channels at two side tops of the adsorption area 322, an aeration structure is arranged at the bottom of the adsorption area 322, the secondary sedimentation tank 33 comprises a sedimentation stirring area 331 and a sedimentation area 332 which are sequentially arranged from the water inlet end to the water outlet end, a sedimentation stirrer 333 is arranged in the sedimentation stirring area 331, and a water outlet of the sedimentation area 332 is connected with the purification treatment unit 4; the purification treatment unit 4 comprises a biochemical treatment device 41 and/or a multistage evaporation device 42; the iron sludge conveying unit 5 comprises a conveying main pipeline 51 connected with the iron sludge outlet 311, a first conveying branch 52 connected with the primary sedimentation tank 12, a second conveying branch 53 connected with the sedimentation stirring zone 331 and a third conveying branch 54 connected with the sludge treatment unit 6, wherein the first conveying branch 52, the second conveying branch 53 and the third conveying branch 54 are connected with the conveying main pipeline 51 and are respectively provided with a valve and a conveying pump, and the sludge outlet of the secondary sedimentation tank 33 is connected with the sludge treatment unit 6.
The process of treating wastewater by the treatment system provided by the embodiment is as follows: the wastewater is filtered by a grid and enters a pre-adjusting tank 11 for water quality balance, then enters a primary sedimentation tank 12 for flocculation precipitation and then enters a Fenton reaction unit 2 for Fenton reaction treatment, wherein the Fenton reaction treatment comprises: after the pH of the wastewater is adjusted to be acidic in the pH adjusting tank 21, the wastewater enters a channel formed by the first mixing guide plate 221 and the second mixing guide plate 222 from the water inlet of the ferrite mixing tank 22 to the water outlet thereof, so that the wastewater is mixed with the ferrite for not less than 10min, then enters the oxidation reaction tank 23 from the water inlet of the first oxidation tank 231, is stirred and mixed by the oxidation stirrer 233 in the first oxidation tank 231, flows from the channel formed by the first oxidation guide plate 234 and the second oxidation guide plate 235 to the water outlet of the first oxidation tank 231 to enter the water inlet of the second oxidation tank 232, is stirred and mixed by the oxidation stirrer 233 in the second oxidation tank 232, and flows from the channel formed by the first oxidation guide plate 234 and the second oxidation guide plate 235 to the water outlet of the second oxidation tank 232, so that the wastewater is subjected to oxidation reaction for not less than 40min by the oxidant, and finally enters the neutralization tank 24 and the degassing tank 25 from the water outlet of the second oxidation tank 232 to be neutralized and degassed sequentially.
The wastewater after Fenton reaction treatment is input into a first-stage sedimentation tank 31 from a water outlet of a degassing tank 25 for self flocculation to generate Fenton iron mud, the iron mud is input into a conveying main pipeline 51 through an iron mud outlet 311, then is input into a primary sedimentation tank 12, a sedimentation stirring zone 331 and a mud treatment unit 6 respectively from a first conveying branch 52, a second conveying branch 53 and a third conveying branch 54, water discharged from the first-stage sedimentation tank 31 enters an adsorption stirring zone 321 from a water inlet of an adsorption tank 32, is stirred and mixed in the adsorption stirring zone 321 by an adsorption stirrer 323, enters an adsorption zone 322 from an overflow channel, is overflowed into the sedimentation stirring zone 331 from the side, opposite to the adsorption stirring zone 321, is rapidly stirred by a sedimentation stirrer 333 and overflowed into the sedimentation zone 332 for flocculation precipitation, and finally the water discharged from the sedimentation zone 332 is input into a biochemical treatment device 41 and/or a multi-stage evaporation device 42 for purification treatment.
The preferred embodiments of the present utility model have been described in detail above with reference to the accompanying drawings, but the present utility model is not limited to the specific details of the above embodiments, and various simple modifications can be made to the technical solution of the present utility model within the scope of the technical concept of the present utility model, and all the simple modifications belong to the protection scope of the present utility model.
In addition, the specific features described in the above embodiments may be combined in any suitable manner without contradiction. The various possible combinations of the utility model are not described in detail in order to avoid unnecessary repetition.
Moreover, any combination of the various embodiments of the utility model can be made without departing from the spirit of the utility model, which should also be considered as disclosed herein.
Claims (10)
1. The treatment system of the high CODcr and/or high salt wastewater is characterized by comprising a pretreatment unit (1), a Fenton reaction unit (2), an adsorption precipitation unit (3) and a purification treatment unit (4); the pretreatment unit (1) comprises a primary sedimentation tank (12), the adsorption sedimentation unit (3) comprises a primary sedimentation tank (31), an adsorption tank (32) and a secondary sedimentation tank (33) which are sequentially connected, the water inlet of the Fenton reaction unit (2) is connected with the water outlet of the primary sedimentation tank (12), the water outlet is connected with the water inlet of the primary sedimentation tank (31), and the water outlet of the secondary sedimentation tank (33) is connected with the purification treatment unit (4);
be provided with iron mud export (311) on one-level sedimentation tank (31), iron mud export (311) through iron mud conveying unit (5) with primary sedimentation tank (12) with second grade sedimentation tank (33) are connected.
2. The treatment system according to claim 1, characterized in that the Fenton reaction unit (2) comprises a pH adjusting tank (21), a ferrite mixing tank (22), an oxidation reaction tank (23), a neutralization tank (24) and a degassing tank (25) which are sequentially connected, wherein a water inlet of the pH adjusting tank (21) is connected with a water outlet of the primary sedimentation tank (12), and a water outlet of the degassing tank (25) is connected with a water inlet of the primary sedimentation tank (31).
3. The processing system according to claim 2, wherein at least one first mixing baffle (221) and at least one second mixing baffle (222) arranged at intervals with the first mixing baffle (221) are arranged in the ferrite mixing tank (22), one end of the first mixing baffle (221) is connected with the top of the ferrite mixing tank (22), a mixing guide channel (223) is formed between the other end of the first mixing baffle and the bottom of the ferrite mixing tank (22), and one end of the second mixing baffle (222) is connected with the bottom of the ferrite mixing tank (22), and a mixing guide channel (223) is formed between the other end of the second mixing baffle and the top of the ferrite mixing tank (22).
4. A treatment system according to claim 3, characterized in that the first mixing baffle (221) and the second mixing baffle (222) are each provided with a mixing turbulence structure extending towards the water inlet end of the ferrite mixing tank (22).
5. The treatment system according to claim 2, wherein the oxidation reaction tank (23) comprises a first oxidation tank (231) and a second oxidation tank (232) which are arranged in parallel, a water outlet of the first oxidation tank (231) is connected with a water inlet of the second oxidation tank (232), and an oxidation stirrer (233) and an oxidation diversion assembly are sequentially arranged in the first oxidation tank (231) and the second oxidation tank (232) from a water inlet end to a water outlet end.
6. The treatment system of claim 5, wherein the oxidation baffle assembly comprises at least one first oxidation baffle (234) and at least one second oxidation baffle (235) spaced apart from the first oxidation baffle (234), one end of the first oxidation baffle (234) being connected to the top of the oxidation reaction cell (23) and the other end forming an oxidation guide channel (236) with the bottom of the oxidation reaction cell (23), one end of the second oxidation baffle (235) being connected to the bottom of the oxidation reaction cell (23) and the other end forming an oxidation guide channel (236) with the top of the oxidation reaction cell (23).
7. The treatment system of claim 6, wherein the first oxidation baffle (234) and the second oxidation baffle (235) are each provided with an oxidation spoiler structure.
8. The treatment system according to any one of claims 1 to 7, characterized in that the pretreatment unit (1) further comprises a pre-conditioning tank (11), the water outlet of the pre-conditioning tank (11) being connected to the water inlet of the preliminary sedimentation tank (12), a grid being provided on the water inlet line of the pre-conditioning tank (11); the purification treatment unit (4) comprises a biochemical treatment device (41) and/or a multistage evaporation device (42).
9. The treatment system according to any one of claims 1 to 7, wherein the adsorption tank (32) comprises an adsorption stirring zone (321) and an adsorption zone (322) which are sequentially arranged from a water inlet end to a water outlet end, an overflow channel is formed between at least one side wall of the adsorption zone (322) and the adsorption stirring zone (321), and an aeration structure is arranged at the bottom of the adsorption zone (322).
10. The treatment system according to any one of claims 1 to 7, characterized in that the iron sludge conveying unit (5) comprises a main conveying pipeline (51) connected with the iron sludge outlet (311), a first conveying branch (52) connected with the primary sedimentation tank (12), a second conveying branch (53) connected with the secondary sedimentation tank (33) and a third conveying branch (54) connected with the sludge treatment unit (6), the first conveying branch (52), the second conveying branch (53) and the third conveying branch (54) being connected with the main conveying pipeline (51) and being provided with a valve and a conveying pump, respectively, the sludge outlet of the secondary sedimentation tank (33) being connected with the sludge treatment unit (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223576610.5U CN219031959U (en) | 2022-12-30 | 2022-12-30 | High CODcr and/or high salt wastewater treatment system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223576610.5U CN219031959U (en) | 2022-12-30 | 2022-12-30 | High CODcr and/or high salt wastewater treatment system |
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| Publication Number | Publication Date |
|---|---|
| CN219031959U true CN219031959U (en) | 2023-05-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223576610.5U Active CN219031959U (en) | 2022-12-30 | 2022-12-30 | High CODcr and/or high salt wastewater treatment system |
Country Status (1)
| Country | Link |
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| CN (1) | CN219031959U (en) |
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2022
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