Electroosmosis sludge treatment device suitable for feeding materials with different water contents

Abstract

The electroosmosis sludge treatment device suitable for feeding with different water contents comprises a pre-squeezing unit and an electroosmosis dehydration unit which are installed on a rack, the electroosmosis dehydration unit is arranged at the output end of the pre-squeezing unit, the pre-squeezing unit comprises a first filter belt and a second filter belt, and the first filter belt is connected with the second filter belt. Two press rollers arranged at intervals are arranged on the inner side of the first filter belt, a reverse press roller is arranged on the inner side of the second filter belt, and the reverse press roller is arranged between the two press rollers and extends towards the inner side of the first filter belt to form an inverted-T-shaped section; and the end part of the second filter belt is propped against the outer edge surface of the anode roller of the electroosmosis dehydration unit. According to the electroosmosis sludge treatment device suitable for feeding with different water contents, the pre-squeezing unit is arranged at the front end of the electroosmosis dehydration unit, the water content of incoming sludge entering the electroosmosis dehydration unit is reduced through the pre-squeezing unit, and the requirements of pugs with different water contents can be met by combining the squeezing roller and the reverse squeezing roller; and the total dehydration amount of the electroosmosis section is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of sludge treatment, and more specifically to an electric osmosis sludge treatment device suitable for feeds with different moisture contents. Background Art

[0002] Municipal sludge has high water content, is difficult to dehydrate, produces foul odor, contains high organic matter and pathogenic microorganisms and other harmful substances. If not properly handled, it will seriously affect the ecological environment and endanger human health. If sanitary landfill is used for disposal, the sludge needs to be dehydrated to less than 60%.

[0003] At present, belt filter presses and screw presses can only dehydrate to about 85%, while high-pressure diaphragm plates and frames and sludge drying technology can dehydrate to less than 60%. However, it usually requires conditioning with chemicals. Generally, more than 20% (based on the absolute dry mud volume) of lime and more than 10% (based on the absolute dry mud volume) of ferric chloride are added to condition and break the cell walls. The dehydration stage requires high-pressure filtration, secondary pressing, air purge and other systems, and the system is complex. The mud cake after filtration cannot be used for land use or direct incineration due to its high pH, ​​high calcium content and high chlorine content. It can only be mixed and landfilled, which limits the resource utilization of sludge.

[0004] The electro-osmosis dehydration technology has a simple process flow, does not require the addition of chemicals, does not require high-pressure filtration, can directly dehydrate to less than 60%, and has good environmental and sanitary conditions. For example, an electro-osmosis sludge modification and drying device disclosed in CN103613266A can achieve electro-osmosis dehydration, but its dehydration efficiency is low, which directly affects its processing energy consumption. The current pre-dehydration technology such as belt filter press and screw press is difficult to achieve the requirement of sludge moisture content less than 80%, resulting in high processing energy consumption of electro-osmosis dehydration technology in engineering applications. Utility Model Content

[0005] The utility model provides an electric osmosis sludge treatment device suitable for feeds with different moisture contents, so as to solve the problem of high energy consumption of the existing electric osmosis sludge modification and drying device.

[0006] According to one aspect of the utility model, there is provided an electro-osmosis sludge treatment device suitable for feeds with different moisture contents, comprising a pre-pressing unit and an electro-osmosis dehydration unit installed on a frame, wherein the electro-osmosis dehydration unit is arranged at the output end of the pre-pressing unit, and the pre-pressing unit comprises a first filter belt and a second filter belt, wherein two spaced-apart pressing rollers are arranged on the inner side of the first filter belt, and a reverse pressing roller is arranged on the inner side of the second filter belt, wherein the reverse pressing roller is arranged between the two pressing rollers and extends toward the inner side of the first filter belt to form a convex cross-section; the end of the second filter belt abuts against the outer edge surface of the anode roller of the electro-osmosis dehydration unit.

[0007] Preferably, based on the above solution, the pre-pressing unit is provided with a counter scraper acting on the second filter belt.

[0008] Preferably, based on the above scheme, both ends of the first filter belt are tensioned by tensioning rollers, the pressing roller is located on one side of the two tensioning rollers, and a guide roller is provided on the other side of the two tensioning rollers.

[0009] Preferably, based on the above solution, the second filter belt is stretched by two driving rollers, and two guide shaft rollers and two tensioning shaft rollers are arranged on the inner side of the second filter belt between the driving rollers.

[0010] Preferably, based on the above scheme, the two tensioning shaft rollers are respectively arranged on the inner side of the second filter belt close to the driving roller, and the two guide shaft rollers are at the same horizontal position and higher than the horizontal positions of the anode roller and the reverse pressure roller.

[0011] Preferably, based on the above scheme, one of the tensioning rollers is located above the guide shaft roller, and a reverse scraper is mounted on the guide shaft roller to act on the second filter belt.

[0012] Preferably, based on the above solution, the outer edge surfaces of the second filter belts of the two guide shaft rollers are provided with a winding roller.

[0013] Preferably, based on the above scheme, cylinder driving devices are installed on both sides of the reverse scraper, and the reverse scraper is a hard alloy blade, and its top is wedge-shaped.

[0014] Preferably, based on the above scheme, the anode roller comprises a skeleton with an octagonal cross section and a non-soluble composite alloy coating disposed outside the skeleton.

[0015] Preferably, based on the above scheme, it further comprises a semicircular cathode, wherein the cathode is arranged around the outer edge surface of the second filter belt which abuts against the anode roller.

[0016] The utility model discloses an electro-osmosis sludge treatment device suitable for feeds with different moisture contents. A pre-pressing unit is arranged at the front end of the electro-osmosis dehydration unit. The pre-pressing unit is used to reduce the moisture content of the incoming sludge entering the electro-osmosis dehydration unit. Combined with a pressing roller and a reverse pressing roller, the device can adapt to the requirements of mud materials with different moisture contents and reduce the total dehydration amount of the electro-osmosis section.

[0017] A reverse scraper is provided at the rear end of the pre-pressing unit, which evenly scrapes the sludge on the second filter belt at the upper end of the pre-pressing unit and enters the input end of the electro-osmosis dehydration unit. A rolling roller is further provided to spread the sludge for the second time and control the thickness of the mud cake.

[0018] The electric osmosis section and the filter belt at the lower end of the pressing section of the utility model share the same filter belt; further, physical dehydration is performed through the pre-pressing section, which is suitable for mud materials with high water content, ensuring that the moisture content of the mud entering the electric osmosis reaches the optimal requirement, thereby reducing the energy consumption of the electric osmosis dehydration section and improving the processing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following is a brief introduction to the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. In the drawings:

[0020] Figure 1 This is a schematic diagram of the structure of the electric osmosis sludge treatment device of the utility model.

[0021] Description of Figure Numbers:

[0022] Pre-pressing unit 100, feed port 101, first filter belt 102, pressing roller 103, guide roller 104, tensioning roller 105, reverse pressing roller 106, electro-osmosis dehydration unit 200, reverse scraper 201, winding roller 202, second filter belt 203, anode roller 204, brush 205, cathode 207, tensioning shaft roller 208, scraper 209, cathode guide roller 210, drive roller 211, guide shaft roller 212, frame 300. DETAILED DESCRIPTION

[0023] The following is a further detailed description of the specific implementation of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0024] It should be understood that when used in this specification and the appended claims, the term "comprising" indicates the presence of described features, integers, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or collections.

[0025] In order to simplify the drawings, only the parts related to the utility model are schematically shown in each figure, and they do not represent the actual structure of the product. In addition, in order to simplify the drawings and facilitate understanding, in some figures, only one of the parts with the same structure or function is schematically drawn or marked. In this article, "one" not only means "only one", but also means "more than one".

[0026] It should be further understood that the term “and / or” used in the specification and appended claims refers to any combination and all possible combinations of one or more of the associated listed items, and includes these combinations.

[0027] In the embodiments shown in the drawings, the directions (such as up, down, left, right, front and back) used to explain the structure and movement of the various components of the present invention are not absolute but relative. These descriptions are appropriate when the components are in the positions shown in the drawings. If the description of the positions of the components changes, the directions also change accordingly.

[0028] In addition, in the description of the present application, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0029] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the specific implementation methods of the utility model will be described below with reference to the accompanying drawings. Obviously, the accompanying drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings and other implementation methods can be obtained based on these drawings without creative work.

[0030] See also Figure 1 The utility model discloses an electro-osmosis sludge treatment device suitable for feeds with different moisture contents, comprising a pre-pressing unit 100 and an electro-osmosis dehydration unit 200 installed on a frame 300. The electro-osmosis dehydration unit 200 is arranged at the output end of the pre-pressing unit 100. The pre-pressing unit 100 is used to press the incoming material, thereby reducing the energy consumption of the electro-osmosis sludge entering the electro-osmosis dehydration unit 200 and ensuring its dehydration effect.

[0031] The pre-pressing unit 100 of the utility model comprises a first filter belt 102 and a second filter belt 203. Two spaced press rollers 103 are arranged inside the first filter belt 102. A reverse press roller 106 is arranged inside the second filter belt 203. The reverse press roller 106 is arranged between the two press rollers 103 and extends to the inside of the first filter belt 102 to form a convex cross section. The end of the second filter belt 203 is in conflict with the outer edge of the anode roller 204 of the electro-osmosis dehydration unit 200. In order to achieve overall beauty and avoid pollution to the external environment during the treatment process, the utility model also sets a cover on the frame 300, and a feed port 101 is set on the cover. The feed port 101 is set on one side of the first filter belt 102.

[0032] When in use, the first filter belt 102 and the second filter belt 203 are driven by the motor to rotate in a circular motion. The mud cake first enters from the feed port 101, and is brought into the gap between the pressing roller 103 and the reverse pressing roller 106 through the interaction between the first filter belt 102 and the second filter belt 203. The mud cake between the first filter belt 102 and the second filter belt 203 can be squeezed through the drop formed between the pressing roller 103 and the reverse pressing roller 106 to remove some of the moisture therein. The mud cake after the water is squeezed out is then introduced into the anode drum for electro-osmosis dehydration.

[0033] It should be noted that in order to ensure the dehydration effect of the electro-osmosis dehydration section, the utility model is provided with a reverse scraper 201 on the pre-pressing unit 100 to act on the second filter belt 203. The reverse scraper 201 acts on the pre-dehydrated mud cake to flatten its thickness on the second filter belt 203, thereby controlling the thickness of the sludge on the second filter belt 203 and avoiding unstable dehydration effect of the electro-osmosis dehydration section due to uneven thickness.

[0034] As a preferred embodiment of the utility model, both ends of the first filter belt 102 of the utility model are tensioned by tensioning rollers 105, the pressing roller 103 is on one side of the two tensioning rollers 105, and the other side of the two tensioning rollers 105 is provided with a guide roller 104; the second filter belt 203 is stretched by two driving rollers 211, and two guide shaft rollers 212 and two tensioning shaft rollers 208 are provided on the inner side of the second filter belt 203 between the driving rollers 211; the two tensioning shaft rollers 208 are respectively arranged on the inner side of the second filter belt 203 close to the driving rollers 211, and the two guide shaft rollers 212 are at the same horizontal position and higher than the horizontal positions of the anode roller 204 and the reverse pressure roller 106, so as to ensure that the mud cake is subjected to sufficient extrusion force after entering between the first filter belt 102 and the second filter belt 203 between the reverse pressure roller 106 and the pressing roller 103, thereby ensuring the effect of pre-extrusion of water.

[0035] At the same time, by controlling the spacing between the tensioning roller 105 and the tensioning shaft roller 208, the tension between the first filter belt 102 and the second filter belt 203 can be adjusted, thereby adjusting the extrusion force between the two. When in use, multiple pressing rollers 103 can also be designed according to the moisture content of the mud material to achieve the optimal requirement for the moisture content of the mud entering the electro-osmosis unit. The preferred moisture content of the mud out of the pre-pressing section should be 80%.

[0036] It should be noted that one of the tensioning rollers 105 of the present invention is located on the upper part of the guide shaft roller 212, and a reverse scraper 201 is installed on the guide shaft roller 212 to act on the second filter belt 203 to control the thickness of the sludge on the second filter belt 203 and prevent the sludge from adhering to the filter belt of the pre-pressing unit 100.

[0037] like Figure 1As shown, the outer edge surface of the second filter belt 203 of the two guide shaft rollers 212 of the utility model is provided with a winding roller 202 to achieve uniform mud feeding in the electro-osmosis dehydration section, and the preferred thickness of the mud cake fed is preferably 4 mm.

[0038] Among them, cylinder driving devices are installed on both sides of the reverse scraper 201, and the reverse scraper 209 is a hard alloy blade with a wedge-shaped top. In order to further enhance the effect of the reverse scraper 201, a lifting spring is installed in the middle of the reverse scraper 209 to ensure that the reverse scraper 209 is evenly subjected to force on the second filter belt 203, thereby ensuring that the sludge on the filter screen is scraped off cleanly.

[0039] Specifically, the anode roller 204 of the utility model includes a frame with an octagonal cross section and a non-soluble composite alloy coating disposed outside the frame, and a brush 205 is disposed inside the frame. The utility model also includes a semicircular cathode 207, which is disposed around the second filter belt 203 and abuts against the outer edge of the anode roller 204, and a plurality of cathode guide rollers 210 evenly distributed at intervals are installed on the cathode 207, and the anode roller and the cathode 207 are independent and unrelated structures, and the brush 205 device is independently disposed and powered separately.

[0040] During operation, the mud cake first enters the pre-pressing unit 100 from the feed port 101 for pre-dehydration, and passes through multiple pressing rollers 103 of different diameters in the pre-pressing unit 100 at one time. In this area, the sludge is pre-dehydrated under the squeezing of the first filter belt 102 and the second filter belt 203. The pre-dehydrated mud cake enters the end of the pre-pressing unit 100, and the sludge adhering to the upper filter belt is scraped off by the reverse scraper 209, and enters the rolling roller 202 to spread the sludge to control the sludge thickness, and then enters the electro-osmosis dehydration unit 200, passes through the anode roller and the cathode 207, and under the potential difference formed by the anode roller and the cathode 207, the negatively charged sludge approaches the anode, and the combined water approaches the cathode, and finally completes the dehydration under the squeezing of the anode roller 204 and the filter belt, and is finally scraped and discharged from the scraper 209 set at the end of the electro-osmosis, thereby completing the full dehydration treatment.

[0041] The utility model discloses an electro-osmosis sludge treatment device suitable for feeds with different moisture contents. A pre-pressing unit 100 is arranged at the front end of the electro-osmosis dehydration unit 200. The pre-pressing unit 100 can reduce the moisture content of the incoming sludge entering the electro-osmosis dehydration unit 200. Combined with the pressing roller 103 and the reverse pressing roller 103, it can adapt to the requirements of mud with different moisture contents and reduce the total dehydration amount of the electro-osmosis section.

[0042] A reverse scraper 209 is provided at the rear end of the pre-pressing unit 100. The reverse scraper 209 evenly scrapes the sludge on the second filter belt 203 at the upper end of the pre-pressing and enters the input end of the electro-osmosis dehydration unit 200. A rolling roller 202 is further provided to spread the mud material for the second time and control the thickness of the mud cake.

[0043] The electric osmosis section and the filter belt at the lower end of the pressing section of the utility model share the same filter belt; further, physical dehydration is performed through the pre-pressing section, which is suitable for mud materials with high water content, ensuring that the moisture content of the mud entering the electric osmosis reaches the optimal requirement, thereby reducing the energy consumption of the electric osmosis dehydration section and improving the processing efficiency.

[0044] Finally, the method of this application is only a preferred implementation scheme and is not intended to limit the protection scope of the utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the utility model should be included in the protection scope of the utility model.

Claims

1. An electro-osmosis sludge treatment device suitable for feeds with different moisture contents, characterized in that: It includes a pre-pressing unit and an electro-osmosis dehydration unit installed on a frame, the electro-osmosis dehydration unit is arranged at the output end of the pre-pressing unit, the pre-pressing unit includes a first filter belt and a second filter belt, two spaced pressing rollers are arranged on the inner side of the first filter belt, a reverse pressing roller is arranged on the inner side of the second filter belt, the reverse pressing roller is arranged between the two pressing rollers and extends to the inner side of the first filter belt to form a convex cross-section; the end of the second filter belt is in conflict with the outer edge surface of the anode roller of the electro-osmosis dehydration unit.

2. The electro-osmosis sludge treatment device suitable for feeds with different moisture contents according to claim 1, characterized in that: The pre-pressing unit is provided with a reverse scraper to act on the second filter belt.

3. The electro-osmosis sludge treatment device suitable for feeds with different moisture contents according to claim 1, characterized in that: The two ends of the first filter belt are tensioned by tensioning rollers, the pressing roller is located on one side of the two tensioning rollers, and the other side of the two tensioning rollers is provided with a guide roller.

4. The electro-osmosis sludge treatment device suitable for feeds with different moisture contents as claimed in claim 3, characterized in that: The second filter belt is stretched by two driving rollers, and two guide shaft rollers and two tension shaft rollers are arranged on the inner side of the second filter belt between the driving rollers.

5. The electro-osmosis sludge treatment device suitable for feeds with different moisture contents as claimed in claim 4, characterized in that: The two tensioning shaft rollers are respectively arranged on the inner side of the second filter belt close to the driving roller, and the two guide shaft rollers are at the same horizontal position and higher than the horizontal positions of the anode roller and the reverse pressure roller.

6. The electro-osmosis sludge treatment device suitable for feeds with different moisture contents as claimed in claim 5, characterized in that: One of the tensioning rollers is located above the guide shaft roller, and a reverse scraper is mounted on the guide shaft roller to act on the second filter belt.

7. The electro-osmosis sludge treatment device suitable for feeds with different moisture contents as claimed in claim 6, characterized in that: The outer edge surfaces of the second filter belts of the two guide shaft rollers are provided with a winding roller.

8. The electro-osmosis sludge treatment device suitable for feeds with different moisture contents as claimed in claim 6, characterized in that: Cylinder driving devices are installed on both sides of the reverse scraper, and the reverse scraper is a hard alloy knife with a wedge-shaped top.

9. The electro-osmosis sludge treatment device suitable for feeds with different moisture contents as claimed in claim 1, characterized in that: The anode roller comprises a skeleton with an octagonal cross section and a non-soluble composite alloy coating arranged outside the skeleton.

10. The electro-osmosis sludge treatment device suitable for feeds with different moisture contents as claimed in claim 2, characterized in that: The invention also comprises a semicircular cathode, which is arranged around the outer edge surface of the second filter belt and contacts the anode roller.

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