A waste sludge dehydration-oxidation-solidification integrated treatment device and method

Abstract

The present invention relates to the technical field of waste mud treatment, and in particular to a waste mud dehydration-oxidation-solidification integrated treatment device and method. The device includes a top plate, a piezoelectric filter cloth, a panel, a rotor, a support frame, and a bottom plate. The upper and lower ends of the support frame are respectively connected to the top plate and the bottom plate to form a rotating mechanism. The rotor is connected to the bottom plate, the piezoelectric filter cloth is fixed on both sides of the support frame, and the panel is arranged on the outside of the rotating mechanism. A drain pipe is provided on the panel. The present invention can organically combine the current inefficient and isolated treatment methods such as solidification, filter press dehydration, and oxidation, greatly improve the dehydration rate of the waste mud, and improve the mechanical properties of the mud after dehydration, meeting the performance requirements of the rolling filler; the piezoelectric principle is used to degrade and oxidize the organic matter and microorganisms in the waste mud, so that the filtrate can be discharged without secondary treatment, or the secondary treatment cost of the filtrate is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of waste mud treatment, and in particular to a waste mud dehydration-oxidation-solidification integrated treatment device and method. Background Art

[0002] With the acceleration of urban modernization and the rapid development of underground construction, the demand for the treatment of construction waste mud is also increasing. The water content of waste mud is often very high. Whether it is transported to landfill or reused as filler on site, the waste mud needs to be dehydrated or solidified, and even oxidized, so that the water content or other properties of the mud meet the requirements of relevant specifications before it can be transported to landfill or reused. The traditional methods for treating waste mud on site are: 1. Discharge the supernatant after natural sedimentation, and then transport or solidify the clay at the bottom of the pool; 2. Directly add chemical curing agent, stir it evenly, so that it reacts chemically with the water in the mud, reduce the water content, improve the mechanical properties, and reduce the leaching of harmful substances, so as to meet the conditions for transportation or reuse of filler; 3. After adding flocculant, the waste mud is subjected to filter press treatment, and then the mud cake is transported or reprocessed on site for reuse.

[0003] Different traditional methods for treating waste mud have single effects and different shortcomings: 1. The natural sedimentation method occupies a large construction site and has a long treatment cycle, which causes chaos in the construction site and tight land use, affecting construction efficiency and construction period; 2. The chemical curing agent method generally uses a large amount of curing agent, resulting in high cost, and the same curing agent has different dehydration and curing effects on different muds. In addition, the single curing agent method has poor dehydration and curing effects on mud; 3. The filter press dehydration method consumes large power and has high cost, and the organic matter, heavy metals and other harmful substances contained in the mud cake and filtrate after the filter press treatment are not removed. The mud cake cannot be directly recycled and reused, and the filtrate also needs secondary treatment before it can be discharged. Summary of the invention

[0004] The present invention provides a waste mud dehydration-oxidation-solidification integrated treatment device and method, aiming to solve the waste mud dehydration, solidification, oxidation efficiency and cost problems.

[0005] The present invention provides an integrated treatment device for waste mud dehydration-oxidation-solidification, comprising a top plate, a piezoelectric filter cloth, a surrounding plate, a rotor, a support frame, and a bottom plate, wherein the upper and lower ends of the support frame are respectively connected to the top plate and the bottom plate to form a rotating mechanism, the rotor is connected to the bottom plate, the piezoelectric filter cloth is fixed on both inner and outer sides of the support frame, the surrounding plate is arranged outside the rotating mechanism, and a drainage pipe is provided on the surrounding plate.

[0006] As a further improvement of the present invention, the support frame is composed of a plurality of support rods, and the plurality of support rods are arranged in sequence to form a hollow support surface to fix the piezoelectric filter cloth.

[0007] As a further improvement of the present invention, the top plate, the supporting frame, the piezoelectric filter cloth and the interior of the bottom plate form a mud processing chamber, and the top plate is detachably connected to the upper end of the supporting frame.

[0008] As a further improvement of the present invention, the integrated dehydration-oxidation-solidification treatment device for waste mud also includes vertical support legs, which are connected to the bottom of the enclosure to support the enclosure, the enclosure is fitted and connected to the outer edge of the bottom plate, a filtrate chamber is provided between the enclosure and the piezoelectric filter cloth, and the drain pipe is arranged at the bottom of the filtrate chamber.

[0009] As a further improvement of the present invention, the integrated dehydration-oxidation-solidification treatment device for waste sludge also includes a unloading baffle, the bottom plate is provided with a unloading hole, the unloading baffle is detachably connected to the unloading hole of the bottom plate, and the unloading hole is aligned with the position of the piezoelectric filter cloth.

[0010] As a further improvement of the present invention, the piezoelectric filter cloth is a replacement-free filter cloth with piezoelectric catalysis, and the preparation process of the piezoelectric filter cloth comprises the steps of:

[0011] a1. Mix polyvinylidene fluoride PVDF and nano zinc oxide ZnO and heat them to a molten state;

[0012] a2. The filter cloth is covered in a drum collector, and the PVDF / ZnO mixed liquid phase is melt blown and crystallized to form a PVDF composite piezoelectric film on one side of the filter cloth;

[0013] a3. Let the filter cloth stand and cool, replace the filter cloth surface, and repeat step a2 until PVDF composite piezoelectric film is formed on both sides of the filter cloth to obtain a piezoelectric filter cloth.

[0014] As a further improvement of the present invention, the filter cloth is made of polypropylene filter cloth, and the temperature of the blow molding crystallization should be controlled at 70-90°C.

[0015] The present invention also provides a waste mud dehydration-oxidation-solidification integrated treatment method, which is based on the waste mud dehydration-oxidation-solidification integrated treatment device and includes the following steps:

[0016] S1. Remove the top plate, pour the waste sludge and additives into the rotating mechanism, close the top plate, and start the rotor;

[0017] S2. The rotor drives the rotating mechanism to rotate. Under the centrifugal effect, the additive and the mud are fully mixed and reacted. At the same time, the filtrate seeps out from the piezoelectric filter cloth, and the filtrate is collected by the enclosure and discharged from the drain pipe;

[0018] S3. The filtrate is degraded into organic matter and microorganisms by the piezoelectric effect of the double-layer piezoelectric filter cloth, and the filter residue is blocked on the piezoelectric filter cloth to form a mud cake;

[0019] S4. When there is no obvious filtrate discharged from the drain pipe, stop the rotation of the rotor, remove the discharge baffle and top plate of the bottom plate, scrape off the mud cake attached to the piezoelectric filter cloth and discharge it from the discharge hole.

[0020] As a further improvement of the present invention, the additives include a curing agent, a flocculant, and an oxidant.

[0021] As a further improvement of the present invention, the curing agent is a geopolymer-based curing agent, and its components mainly consist of S95 mineral powder, PO425 cement, and water glass in a mass ratio of 5:3:2.

[0022] As a further improvement of the present invention, the flocculants are polyaluminium chloride and cationic polyacrylamide.

[0023] The beneficial effects of the present invention are:

[0024] ① It can organically combine the current inefficient and isolated treatment methods such as solidification, filter press dehydration, oxidation, etc., greatly improve the dehydration rate of waste mud, and improve the mechanical properties of mud after dehydration, meeting the performance requirements of rolling filler;

[0025] ② Use the piezoelectric principle to degrade and oxidize organic matter and microorganisms in waste mud, so that the filtrate can be discharged without secondary treatment, or reduce the cost of secondary treatment of the filtrate;

[0026] ③ Traditional filter cloth needs to be replaced from time to time due to blockage problems, but the filter cloth equipped with this device has a piezoelectric catalytic function to degrade blockages and eliminate the need for filter cloth replacement, reducing costs while improving work efficiency;

[0027] ④The device can work quickly and continuously, is easy to operate, and the time interval between centrifugal dehydration cycles is very short. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is the overall structural diagram of the integrated processing device of the present invention;

[0029] Figure 2 It is a schematic structural diagram of a rotating mechanism with a piezoelectric filter cloth in the present invention;

[0030] Figure 3 It is a schematic diagram of the structure of the rotating mechanism without piezoelectric filter cloth in the present invention;

[0031] Figure 4 It is a schematic diagram of the internal structure of the rotating mechanism with piezoelectric filter cloth in the present invention;

[0032] Figure 5It is a bottom structural diagram of the integrated processing device of the present invention;

[0033] Figure 6 It is a schematic diagram of the melt blow molding method in the process of making the piezoelectric filter cloth of the present invention. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments.

[0035] The invention discloses an integrated waste mud dehydration-oxidation-solidification treatment device, which is mainly used in the treatment of waste mud in construction projects. It aims to organically combine isolated links such as dehydration, solidification and oxidation to effectively solve the problems that waste mud is difficult to treat, purify and utilize.

[0036] Specifically, Figures 1 to 5 As shown, the waste mud dehydration-oxidation-solidification integrated treatment device includes a top plate 1, a piezoelectric filter cloth 5, a surrounding plate 6, a rotor 4, a support frame 2, and a bottom plate 3. The upper and lower ends of the support frame 2 are respectively connected to the top plate 1 and the bottom plate 3 to form a rotating mechanism, the rotor 4 is connected to the bottom plate 3, the piezoelectric filter cloth 5 is fixed on the inner and outer sides of the support frame 2, the surrounding plate 6 is arranged on the outside of the rotating mechanism, and a drainage pipe 61 is provided on the surrounding plate 6.

[0037] The rotor 4 provides power to drive the rotating mechanism to work, so that the waste mud in the rotating mechanism is fully mixed with the additive, and provides centrifugal force to cooperate with the piezoelectric filter cloth 5 to separate the mud from solid and liquid, and perform dehydration, solidification and oxidation treatment. The centrifugal force and pressure can be derived according to the size of the rotating mechanism (such as the distance from the center of the rotor 4 to the filter cloth) and the speed during operation, so the pressure required for mud dehydration can be set.

[0038] The piezoelectric filter cloth 5 is a filter cloth with piezoelectric catalytic effect, which is fixed on the inner and outer sides of the support frame 2. The centrifugal force formed when the device is working is the pressure on the piezoelectric filter cloth 5. The generated voltage can catalyze the degradation of organic matter and microorganisms in the mud, and at the same time dredge the blockage of the filter cloth, eliminating the need for filter cloth replacement.

[0039] The support frame 2 is composed of a plurality of support rods, which are arranged in sequence to form a hollow support surface to fix the piezoelectric filter cloth 5. The support frame 2 connects the rotor 4, the bottom plate 3, and the top plate 1 to form a rotating device, and at the same time fixes the piezoelectric filter cloth 5. The hollow support frame 2 structure formed by the plurality of support rods can make the filtrate pass through the piezoelectric filter cloth 5 more smoothly and be discharged to the enclosure 6.

[0040] The top plate 1, the support frame 2, the piezoelectric filter cloth 5, and the bottom plate 3 constitute a mud processing chamber, and the top plate 1 is detachably connected to the upper end of the support frame 2. The top plate 1 is a detachable top plate 1, which is disassembled before work to facilitate pouring waste mud into the mud processing chamber and adding additives such as curing agent, flocculant, oxidant, etc.

[0041] The waste mud dehydration-oxidation-solidification integrated treatment device also includes a vertical support foot 62, which is connected to the bottom of the enclosure 6 to support the enclosure 6. The enclosure 6 is connected to the outer edge of the bottom plate 3, and a filtrate chamber is separated between the enclosure 6 and the piezoelectric filter cloth 5. The drain pipe 61 is set at the bottom of the filtrate chamber. The vertical support mainly provides support for the enclosure 6; the enclosure 6 is used to enclose and collect the filtrate that seeps out from the filter cloth and is obtained by centrifugal dehydration; the drain pipe 61 is used to discharge the collected filtrate. The filtrate chamber serves as a buffer space for the filtrate. The filtrate after passing through the piezoelectric filter cloth 5 can be concentrated in the filtrate chamber and then gradually discharged from the drain pipe 61.

[0042] The waste mud dehydration-oxidation-solidification integrated treatment device also includes a discharge baffle 7. The bottom plate 3 is provided with a discharge hole. The discharge baffle 7 is detachably connected to the discharge hole of the bottom plate 3, and the discharge hole is aligned with the position of the piezoelectric filter cloth 5. The bottom plate 3 is integrated with the rotor 4 and the support frame 2. After centrifugal dehydration is completed, the discharge baffle 7 of the bottom plate 3 is partially detachable, and the mud cakes and mud blocks attached to the piezoelectric filter cloth 5 are scraped off from top to bottom with tools (such as sticks, shovels).

[0043] like Figure 6 As shown, the piezoelectric filter cloth 5 in the present invention is a replacement-free filter cloth with piezoelectric catalysis, which should meet good wear resistance, pressure resistance and conductivity, and a suitable processing method should be selected according to the process performance of the original filter cloth. The following takes polypropylene filter cloth as an example for processing. The preparation process of the piezoelectric filter cloth 5 includes the following steps:

[0044] a1. Mix polyvinylidene fluoride (PVDF) and nano zinc oxide (ZnO) and heat them to a molten state;

[0045] a2. The filter cloth is covered in the drum collector 8, and the PVDF / ZnO mixed liquid phase is melt blown and crystallized to obtain a PVDF / ZnO mixed melt 9 to form a PVDF composite piezoelectric film on one side of the filter cloth;

[0046] a3. Let the filter cloth stand and cool, replace the filter cloth surface, and repeat step a2 until PVDF composite piezoelectric films are formed on both sides of the filter cloth to obtain a piezoelectric filter cloth 5.

[0047] Among them, in step a1, PVDF is the main component for forming the piezoelectric film, and the dosage is preferably 8.4g of powder. ZnO is a nanomaterial for improving piezoelectric performance, and the dosage is preferably 1.6g of powder. In step a2, the filter cloth is preferably a polypropylene filter cloth, which has good conductivity and mechanical properties and can better exert the piezoelectric catalytic effect. In addition, the crystallization temperature using the blow molding method should be controlled between 70 and 90°C to avoid excessive temperature causing softening of the filter cloth or other adverse effects on performance.

[0048] The present invention also provides a waste mud dehydration-oxidation-solidification integrated treatment method, which is performed based on a waste mud dehydration-oxidation-solidification integrated treatment device and includes the following steps:

[0049] S1. Remove the top plate 1, pour the waste sludge and additives into the rotating mechanism, close the top plate 1, and start the rotor 4;

[0050] S2. The rotor 4 drives the rotating mechanism to rotate, and under the centrifugal effect, the additive and the mud are fully mixed and reacted, and the filtrate seeps out from the piezoelectric filter cloth 5, and the filtrate is collected by the enclosure 6 and discharged from the drain pipe 61;

[0051] S3. The filtrate is degraded by the piezoelectric effect of the double-layer piezoelectric filter cloth 5 to degrade organic matter and microorganisms, while the filter residue is blocked on the piezoelectric filter cloth 5 to form a mud cake;

[0052] S4. When no obvious filtrate is discharged from the drain pipe 61, the rotation of the rotor 4 is stopped, the discharge baffle 7 of the bottom plate 3 and the top plate 1 are removed, and the mud cake attached to the piezoelectric filter cloth 5 is scraped off and discharged from the discharge hole.

[0053] Additives include curing agents, flocculants and oxidants.

[0054] The curing agent is an alkali-activated material. Specifically, the curing agent is a geopolymer-based curing agent, and its components are mainly composed of S95 mineral powder, PO425 cement, and water glass in a mass ratio of 5:3:2.

[0055] The flocculants are polyaluminium chloride (PAC) and cationic polyacrylamide (CPAM). CPAM is a high molecular organic substance and is not easily soluble in water. It needs to be prepared into a solution before adding. In the experiment, 5gPAC / 100mL water, 1gCPAM / 500mL water were prepared into a solution, and 10mL flocculant solution / L mud treatment was the best effect.

[0056] The oxidizing agent is a basic oxidizing agent.

[0057] Two embodiments and a comparative example are compared below to illustrate the technical effects achieved by the device and method of the present invention.

[0058] Embodiment 1:

[0059] Taking the dehydration and solidification of 50kg of waste sludge with an organic matter content of 30% as an example, its initial moisture content is 300%. The treatment process is as follows:

[0060] S1. Remove the top plate 1, pour the waste sludge and curing agent into the rotating device, close the top plate 1, and start the device.

[0061] S2. Under the action of centrifugation, the additive and the mud are fully mixed and reacted, and at the same time, the filtrate seeps out from the filter cloth, is collected by the enclosure 6, and is discharged from the drain pipe 61.

[0062] S3. The filtrate degrades organic matter and microorganisms through the piezoelectric effect of the double-layer filter cloth.

[0063] S4. When no obvious filtrate is discharged from the drain pipe 61, the rotating device is stopped, the bottom plate 3 and the top plate 1 are disassembled, and the mud cakes and mud blocks attached to the filter cloth are scraped off.

[0064] In step S1, the curing agent used is a geopolymer-based curing agent, which is composed of S95 mineral powder, PO425 cement, and water glass in a mass ratio of 5:3:2, with an amount of 10 kg and a rotation speed of 10000 r / min. The type of curing agent is not limited, but the curing effect of the geopolymer-based curing agent is better than that of the traditional cement-based curing agent.

[0065] After testing, the device operation time is 30min; before treatment, the specific resistance of the sludge is 21.4×1012 m / kg; after treatment, the specific resistance of the sludge is 8.44×1012 m / kg, the dehydration capacity is greatly improved, and the organic matter content is 9.7%; the 7-day unconfined compressive strength is 267 kPa, and the unconfined compressive strength of the test block after high-pressure extrusion treatment reaches 2.4 MPa.

[0066] Embodiment 2:

[0067] Taking the dehydration and solidification of 50kg of waste sludge with an organic matter content of 30% as an example, its initial moisture content is 150%. The treatment process is as follows:

[0068] S1. Remove the top plate 1, pour the waste sludge and curing agent into the rotating device, close the top plate 1, and start the device.

[0069] S2. Under the action of centrifugation, the additive and the mud are fully mixed and reacted, and at the same time, the filtrate seeps out from the filter cloth, is collected by the enclosure 6, and is discharged from the drain pipe 61.

[0070] S3. The filtrate degrades organic matter and microorganisms through the piezoelectric effect of the double-layer filter cloth.

[0071] S4. When no obvious filtrate is discharged from the drain pipe 61, the rotating device is stopped, the bottom plate 3 and the top plate 1 are disassembled, and the mud cakes and mud blocks attached to the filter cloth are scraped off.

[0072] The curing agent used in step S1 is a geopolymer-based curing agent, which is composed of S95 mineral powder, PO425 cement, and water glass in a mass ratio of 5:3:2, with a dosage of 10 kg and a rotation speed of 10000 r / min.

[0073] After testing, the device operation time was 22 minutes; before treatment, the specific resistance of the sludge was 19.3×1012 m / kg; after treatment, the specific resistance of the sludge was 9.53×1012 m / kg, the dehydration capacity was greatly improved, and the organic matter content was 11.1%; the 7-day unconfined compressive strength was 254 kPa, and the unconfined compressive strength of the test block after high-pressure extrusion treatment reached 2.2 MPa.

[0074] Comparative Example 1:

[0075] The traditional method of dehydration and solidification treatment is adopted. Taking the treatment of 50kg of waste sludge with an organic matter content of 30% as an example, its initial moisture content is 150%. The treatment process is as follows.

[0076] (1) Add flocculant and let stand for 1 hour.

[0077] (2) Drain the supernatant, add the curing agent, stir evenly and let it stand for three hours

[0078] Among them, (1) the middle flocculant is a composite flocculant, and the concentrations of PAC and CPAM are 50 g / L and 2 g / L respectively; (2) the middle curing agent is a geopolymer-based curing agent, which is composed of S95 mineral powder, PO425 cement, and water glass in a mass ratio of 5:3:2, and the dosage is 10 kg.

[0079] According to the test, before treatment, the specific resistance of the sludge was 19.3×1012 m / kg; after treatment, the specific resistance of the sludge was 14.4×1012 m / kg, and the organic matter content was 26%; the 7-day unconfined compressive strength was 84 kPa, and the unconfined compressive strength of the test block reached 1.1MPa after high-pressure extrusion treatment.

[0080] The higher the sludge specific resistance, the higher the water content. Therefore, the lower the specific resistance after treatment, the stronger the dehydration ability and the higher the strength. The organic matter content will affect the strength formation of the curing agent, so the lower the organic matter content after treatment, the better. The specific resistance and organic matter content of the sludge after treatment in Example 2 are significantly lower than those in Comparative Example 1, and the unconfined compressive strength of Example 2 is higher than that of Comparative Example 1. From the above data, it can be seen that the treatment method of the present invention is superior to the traditional dehydration and solidification treatment method.

[0081] The patent of this invention can be applied to the dehydration, solidification and oxidation treatment of various high-microorganism, organic matter content and high-water content muds. It has the advantages of improving dehydration efficiency, improving the mechanical properties of dewatered mud, reducing costs, reducing pollution and promoting solid waste resource utilization. It is an integrated treatment device worthy of popularization and application.

[0082] The above contents are further detailed descriptions of the present invention in combination with specific preferred embodiments, and it cannot be determined that the specific implementation of the present invention is limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the concept of the present invention, which should be regarded as falling within the protection scope of the present invention.

Claims

1. A waste mud dehydration-oxidation-solidification integrated treatment device, characterized in that: It includes a top plate, a piezoelectric filter cloth, a surrounding plate, a rotor, a support frame, and a bottom plate. The upper and lower ends of the support frame are respectively connected to the top plate and the bottom plate to form a rotating mechanism. The rotor is connected to the bottom plate. The piezoelectric filter cloth is fixed on both sides of the supporting frame. The surrounding plate is arranged outside the rotating mechanism, and a drainage pipe is arranged on the surrounding plate. The piezoelectric filter cloth is a replacement-free filter cloth with piezoelectric catalysis. The preparation process of the piezoelectric filter cloth includes the following steps: a1. Mix polyvinylidene fluoride PVDF and nano zinc oxide ZnO and heat them to a molten state; a2. The filter cloth is covered in a drum collector, and the PVDF / ZnO mixed liquid phase is melt blown and crystallized to form a PVDF composite piezoelectric film on one side of the filter cloth; a3. Let the filter cloth stand and cool, replace the filter cloth surface, and repeat step a2 until PVDF composite piezoelectric film is formed on both sides of the filter cloth to obtain a piezoelectric filter cloth.

2. The waste sludge dehydration-oxidation-solidification integrated treatment device according to claim 1 is characterized in that: The top plate, the supporting frame, the piezoelectric filter cloth and the interior of the bottom plate form a mud processing chamber, and the top plate is detachably connected to the upper end of the supporting frame.

3. The integrated dehydration-oxidation-solidification treatment device for waste sludge according to claim 1 is characterized in that: It also includes vertical support feet, which are connected to the bottom of the enclosure to support the enclosure. The enclosure is fitted and connected to the outer edge of the bottom plate. A filtrate chamber is provided between the enclosure and the piezoelectric filter cloth, and the drain pipe is arranged at the bottom of the filtrate chamber.

4. The integrated dehydration-oxidation-solidification treatment device for waste sludge according to claim 1 is characterized in that: It also includes a discharge baffle, the bottom plate is provided with a discharge hole, the discharge baffle is detachably connected to the discharge hole of the bottom plate, and the discharge hole is aligned with the position of the piezoelectric filter cloth.

5. The integrated dehydration-oxidation-solidification treatment device for waste sludge according to claim 1 is characterized in that: The filter cloth is made of polypropylene filter cloth, and the temperature of the blow molding crystallization should be controlled at 70-90°C.

6. A waste mud dehydration-oxidation-solidification integrated treatment method, characterized in that: The integrated waste sludge dehydration-oxidation-solidification treatment device according to any one of claims 1 to 5 is implemented, comprising the following steps: S1. Remove the top plate, pour the waste sludge and additives into the rotating mechanism, close the top plate, and start the rotor; S2. The rotor drives the rotating mechanism to rotate. Under the centrifugal effect, the additive and the mud are fully mixed and reacted. At the same time, the filtrate seeps out from the piezoelectric filter cloth, and the filtrate is collected by the enclosure and discharged from the drain pipe; S3. The filtrate is degraded into organic matter and microorganisms by the piezoelectric effect of the double-layer piezoelectric filter cloth, and the filter residue is blocked on the piezoelectric filter cloth to form a mud cake; S4. When there is no obvious filtrate discharged from the drain pipe, stop the rotation of the rotor, remove the discharge baffle and top plate of the bottom plate, scrape off the mud cake attached to the piezoelectric filter cloth and discharge it from the discharge hole.

7. The integrated dehydration-oxidation-solidification treatment method for waste sludge according to claim 6 is characterized in that: The additives include a curing agent, a flocculant and an oxidant.

8. The integrated dehydration-oxidation-solidification treatment method for waste sludge according to claim 7 is characterized in that: The curing agent is a geopolymer-based curing agent, and its main components are S95 mineral powder, PO425 cement, and water glass in a mass ratio of 5:3:

2.

9. The integrated dehydration-oxidation-solidification treatment method for waste sludge according to claim 7, characterized in that: The flocculants are polyaluminium chloride and cationic polyacrylamide.

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