Re-filtration equipment for iron-containing sludge wastewater produced by Fenton reaction

Abstract

The utility model provides re-filtration equipment for iron-containing sludge wastewater produced by Fenton reaction, a water distribution system is used for uniformly distributing inlet water, the water is flocculated wastewater and enables the flocculated wastewater to automatically flow into a filtration system, and a transmission device in the filtration system comprises a driving wheel, a driven wheel and a belt, rotating shafts of the driving wheel and the driven wheel are parallel to the ground, the water distribution system is located above the transmission device, the movement direction of the top edge of the driving wheel in the transmission device during rotation is recorded as the conveying direction of the belt, and the conveying direction of the belt is opposite to the water incoming direction of the water distribution system during working; first HIW filter cloth is arranged on the belt, and the first HIW filter cloth is high-hydrophilic filter cloth and is made of a hydrophilic material. The re-filtration equipment solves the problem that iron-containing sludge wastewater is flocculent and is not separated, saves the medicament cost, improves the convenience of field operation, saves the manufacturing cost and occupied area of a sludge system, can operate automatically, and is low in investment cost, low in operation cost and simple and convenient in field operation management.

Description

Technical Field

[0001] This utility model belongs to the field of filtration equipment technology, and specifically relates to a heavy filtration device for iron-containing sludge wastewater produced by Fenton reaction. Background Technology

[0002] In water treatment, recalcitrant organic matter is often removed using the Fenton process, where hydrogen peroxide (H2O2) reacts with ferrous ions (Fe2+) in the catalyst. 2+ Under the action of ), it can generate hydroxyl radicals (·OH) with extremely strong oxidizing power. Utilizing its high oxidation potential and electron affinity, it can non-selectively oxidize most organic matter in water.

[0003] During the Fenton reaction, the pH needs to be adjusted to acidic conditions to ensure the stability of the Fenton reagent and the reaction effect. After the advanced oxidation is completed, the pH is adjusted back to alkaline to allow ferrous ions to form ferric hydroxide (Fe(OH)3) and ferric oxide (Fe2O3) precipitates. The precipitates are flocculent, which is not conducive to separation. Polyacrylamide (PAM) is usually added for flocculation. However, PAM is prone to hydrolysis under high pH conditions, which affects the precipitation effect. At the same time, the dosage of ferrous ions, hydrogen peroxide, and PAM, as well as the reaction pH conditions, have a significant impact on the overall oxidation reaction and precipitation effect. Therefore, a large number of orthogonal experiments are required to determine the dosage of the reagents. In addition, due to the inconsistent composition and quality of various reagents, iron sludge after the Fenton reaction is often difficult to settle, and the effluent contains a large amount of iron ions, which has a significant impact on the subsequent biological treatment process. In actual operation, high requirements are placed on the on-site management and the quality of the operators. Utility Model Content

[0004] To address the aforementioned problems, this utility model provides a heavy filtration device for iron-containing sludge wastewater produced by the Fenton reaction.

[0005] The present invention provides a heavy filtration device for iron-containing sludge wastewater produced by the Fenton reaction, comprising: a water distribution system and a filtration system.

[0006] in,

[0007] The water distribution system is used to evenly distribute the incoming water, which is flocculated wastewater, and to allow the flocculated wastewater to flow by gravity into the next system, namely the filtration system.

[0008] The filtration system includes a transmission device, which comprises a drive wheel and a driven wheel connected to a motor, and a belt that works in conjunction with the drive wheel and driven wheel for transmission. The rotation axes of the drive wheel and driven wheel are parallel to the ground. The water distribution system is located above the transmission device. The direction of movement of the top edge of the drive wheel during rotation is defined as the transmission direction of the belt. Therefore, during operation, the transmission direction of the belt is opposite to the direction of water flow from the water distribution system. A first HIW filter cloth is provided on the belt. The first HIW filter cloth is a highly hydrophilic filter cloth made of hydrophilic material.

[0009] The conveyor end of the belt is equipped with a driven sludge pressing roller, i.e. a filter press roller, so that when the iron sludge accumulated on the first HIW filter cloth passes through the conveyor end, the filter press roller will press and filter the iron sludge to further dehydrate it and reduce its volume.

[0010] further,

[0011] The water distribution system includes an inlet distribution tank, which is used to evenly distribute the incoming water.

[0012] The outlet of the water inlet distribution trough is located above the transmission device. During operation, the conveying direction of the belt is opposite to the direction of the incoming water in the outlet of the water inlet distribution trough.

[0013] further,

[0014] It includes a skimming plate and a sludge discharge system adjacent to the conveying end, through which the iron sludge after pressure filtration enters the sludge discharge system.

[0015] further,

[0016] The sludge discharge system includes a flocculant trough, which is located at the lower end of the skimming plate.

[0017] further,

[0018] A shaftless screw conveyor is installed in the sludge trough to transport the filtered iron sludge. The filtered iron sludge is then transported to the sludge treatment system for further dewatering via a sludge collection trough.

[0019] further,

[0020] The bottom of the flocculation tank is covered with a second HIW filter cloth, which is a highly hydrophilic filter cloth made of hydrophilic material.

[0021] further,

[0022] The filtration diameter of both the first HIW filter cloth and the second HIW filter cloth is below 200μm.

[0023] further,

[0024] The bottom of the flocculation trough below the second HIW filter cloth is provided with perforations;

[0025] A water collection trough is provided below the bottom of the flocculation trough.

[0026] further,

[0027] It also includes a rinsing system, which includes a high-pressure rinsing pipe located above the heavy filtration equipment. The first HIW filter cloth and / or the second HIW filter cloth are rinsed periodically or manually by introducing compressed air or high-pressure water into the high-pressure rinsing pipe.

[0028] The heavy filtration equipment for iron-containing sludge wastewater produced by the Fenton reaction provided by this utility model has the following advantages or beneficial effects:

[0029] 1. The separation effect of iron-containing sludge wastewater is significantly higher than that of coagulation and sedimentation, which solves the problem of the flocculation and non-separation of iron-containing sludge wastewater.

[0030] 2. The amount of PAM reagent used for the Fenton reaction is significantly reduced, saving reagent costs;

[0031] 3. It reduces the precision required for adjusting the alkali in the Fenton reaction, allowing for the over-addition of alkali without considering the hydrolysis of PAM, thus improving the convenience of on-site operation;

[0032] 4. The iron sludge after pressure filtration does not need to be concentrated and can be directly sent to the sludge treatment terminal, saving the cost of sludge system construction and land area;

[0033] 5. The entire set of equipment can operate automatically without human supervision;

[0034] 6. Ensure the quality of the effluent and improve the treatment effect of the downstream biological treatment system;

[0035] 7. The iron-containing sludge wastewater produced by the Fenton reaction can be filtered by gravity through this equipment to achieve the effect of sludge-water separation;

[0036] 8. The aforementioned heavy filtration equipment has low investment costs, low operating expenses, and simple and convenient on-site operation and management.

[0037] Other features and advantages of this invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of this invention can be realized and obtained by means of the structures pointed out in the description, claims, and drawings. Attached Figure Description

[0038] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0039] Figure 1 A cross-sectional view of a filtration device for iron-containing sludge wastewater produced by the Fenton reaction is shown according to an embodiment of the present invention.

[0040] Figure 2 A plan view of the upper layer of a heavy filtration device for iron-containing sludge wastewater produced by the Fenton reaction, according to an embodiment of the present invention, is shown.

[0041] Figure 3 A plan view of the middle layer of a filtration device for iron-containing sludge wastewater produced by the Fenton reaction, according to an embodiment of the present invention, is shown. Detailed Implementation

[0042] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0043] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein in the specification is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the terms "comprising" and "having," and any variations thereof, in the specification, claims, and accompanying drawings of this application are intended to cover non-exclusive inclusion. The terms "first," "second," "third," etc., in the specification, claims, or accompanying drawings of this application are used to distinguish different objects, not to describe a specific order or hierarchy. The term "multiple" in this application refers to two or more (including two).

[0044] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0045] Figure 1 , Figure 2 and Figure 3 The diagrams show a cross-sectional view, an upper plan view, and a middle plan view of the filtration equipment for iron-containing sludge wastewater produced by the Fenton reaction, as provided by this invention. (See also...) Figures 1 to 3 The heavy filtration equipment for the iron-containing sludge wastewater produced by the Fenton reaction includes a water distribution system, a filtration system, a sludge discharge system, and a rinsing system.

[0046] The water distribution system includes an inlet distribution tank. To achieve uniform distribution of the flocculated wastewater after the Fenton reaction on the HIW filter cloth (highly hydrophilic high-speed filter cloth) for mud-water separation, the inlet distribution tank is used to uniformly distribute the inlet water, i.e., the flocculated wastewater, through reasonable water flow pattern calculation, and allow the flocculated wastewater to flow by gravity into the next system, i.e., the filtration system.

[0047] The filtration system includes a transmission device, which comprises a drive pulley and a driven pulley connected to a motor, and a belt that works in conjunction with the drive pulley and driven pulley for transmission. The rotation axes of the drive pulley and driven pulley are parallel to the ground. Figure 1 The pulley in the belt can be either a driving pulley or a driven pulley. The outlet of the water inlet distribution tank is located above the transmission device. The direction of movement of the top edge of the driving pulley in the transmission device is defined as the belt's transmission direction. During operation, the belt's transmission direction is opposite to the direction of the incoming water in the outlet of the water inlet distribution tank. A first HIW filter cloth is installed on the belt. This first HIW filter cloth is a highly hydrophilic filter cloth made of hydrophilic material, allowing water molecules in the flocculated wastewater to pass through the filter cloth more quickly. The filter cloth diameter is below 200μm, effectively preventing flocculated iron sludge from passing through. A driven sludge pressing roller, i.e., a filter press roller, is installed at the end of the belt's transmission. When the iron sludge accumulated on the first HIW filter cloth passes through the end of the transmission, the filter press roller further dehydrates the iron sludge, reducing its volume. After filtration, the iron sludge enters the sludge discharge system through a skimming plate adjacent to the end of the transmission.

[0048] The sludge discharge system includes a flocculant tank located below a skimmer. A shaftless screw conveyor is installed in the tank to transport the filtered iron sludge. The filtered iron sludge is then transported to a sludge treatment system for further dewatering via a collection tank. A second HIW filter cloth is laid at the bottom of the flocculant tank. The filtrate from the filtered iron sludge flows into a collection tank below through perforations at the bottom of the flocculant tank. The second HIW filter cloth is a highly hydrophilic filter cloth made of hydrophilic material, with a filter diameter of less than 200 μm.

[0049] The rinsing system includes a high-pressure rinsing pipe located above the equipment, which can be used to rinse the first HIW filter cloth and / or the second HIW filter cloth periodically or manually by introducing compressed air or high-pressure water into the pipe.

[0050] The heavy filtration equipment provided by this utility model for iron-containing sludge wastewater produced by the Fenton reaction has a significantly higher iron sludge separation effect than coagulation and sedimentation, solving the problem of unseparated flocculent iron sludge; it significantly reduces the amount of PAM reagent used in the Fenton reaction, saving reagent costs; it reduces the precision requirements for alkali adjustment in the Fenton reaction, allowing for over-addition of alkali without considering PAM hydrolysis, improving on-site operational convenience; the iron sludge after pressure filtration does not need to be concentrated and can be directly sent to the sludge treatment terminal, saving on sludge system construction costs and land area; it can achieve automatic operation without human supervision; it ensures effluent quality and improves the treatment effect of downstream biological systems; it achieves gravity filtration to achieve sludge-water separation; it has low investment costs, low operating costs, and simple and convenient on-site operation and management.

[0051] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A filtration device for iron-containing sludge wastewater produced by the Fenton reaction, characterized in that, include: Water distribution system, filtration system in, The water distribution system is used to evenly distribute the incoming water, which is flocculated wastewater, and to allow the flocculated wastewater to flow by gravity into the next system, namely the filtration system. The filtration system includes a transmission device, which comprises a drive wheel and a driven wheel connected to a motor, and a belt that works in conjunction with the drive wheel and driven wheel for transmission. The rotation axes of the drive wheel and driven wheel are parallel to the ground. The water distribution system is located above the transmission device. The direction of movement of the top edge of the drive wheel during rotation is defined as the transmission direction of the belt. Therefore, during operation, the transmission direction of the belt is opposite to the direction of water flow from the water distribution system. A first HIW filter cloth is provided on the belt. The first HIW filter cloth is a highly hydrophilic filter cloth made of hydrophilic material. The conveyor end of the belt is equipped with a driven sludge pressing roller, i.e. a filter press roller, so that when the iron sludge accumulated on the first HIW filter cloth passes through the conveyor end, the filter press roller will press and filter the iron sludge to further dehydrate it and reduce its volume.

2. The filtration equipment for iron-containing sludge wastewater produced by the Fenton reaction according to claim 1, characterized in that, The water distribution system includes an inlet distribution tank, which is used to evenly distribute the incoming water. The outlet of the water inlet distribution trough is located above the transmission device. During operation, the conveying direction of the belt is opposite to the direction of the incoming water in the outlet of the water inlet distribution trough.

3. The filtration equipment for iron-containing sludge wastewater produced by the Fenton reaction according to claim 1 or 2, characterized in that, It includes a skimming plate and a sludge discharge system adjacent to the conveying end, through which the iron sludge after pressure filtration enters the sludge discharge system.

4. The filtration equipment for iron-containing sludge wastewater produced by the Fenton reaction according to claim 3, characterized in that, The sludge discharge system includes a flocculant trough, which is located at the lower end of the skimming plate.

5. The filtration equipment for iron-containing sludge wastewater produced by the Fenton reaction according to claim 4, characterized in that, A shaftless screw conveyor is installed in the sludge trough to transport the filtered iron sludge. The filtered iron sludge is then transported to the sludge treatment system for further dewatering via a sludge collection trough.

6. The filtration equipment for iron-containing sludge wastewater produced by the Fenton reaction according to claim 5, characterized in that, The bottom of the flocculation tank is covered with a second HIW filter cloth, which is a highly hydrophilic filter cloth made of hydrophilic material.

7. The filtration equipment for iron-containing sludge wastewater produced by the Fenton reaction according to claim 6, characterized in that, The filtration diameter of both the first HIW filter cloth and the second HIW filter cloth is below 200μm.

8. The filtration equipment for iron-containing sludge wastewater produced by the Fenton reaction according to claim 7, characterized in that, The bottom of the flocculation trough below the second HIW filter cloth is provided with perforations; A water collection trough is provided below the bottom of the flocculation trough.

9. The filtration equipment for iron-containing sludge wastewater produced by the Fenton reaction according to claim 8, characterized in that, It also includes a rinsing system, which includes a high-pressure rinsing pipe located above the heavy filtration equipment. The first HIW filter cloth and / or the second HIW filter cloth are rinsed periodically or manually by introducing compressed air or high-pressure water into the high-pressure rinsing pipe.

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