CN112250277A - Sludge dewatering method and system based on microwave electrolytic catalytic oxidation - Google Patents
Sludge dewatering method and system based on microwave electrolytic catalytic oxidation Download PDFInfo
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- CN112250277A CN112250277A CN202011538937.6A CN202011538937A CN112250277A CN 112250277 A CN112250277 A CN 112250277A CN 202011538937 A CN202011538937 A CN 202011538937A CN 112250277 A CN112250277 A CN 112250277A
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
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- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/121—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering
- C02F11/122—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering using filter presses
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/15—Treatment of sludge; Devices therefor by de-watering, drying or thickening by treatment with electric, magnetic or electromagnetic fields; by treatment with ultrasonic waves
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Abstract
The invention discloses a sludge dewatering method and system based on microwave electrolytic catalytic oxidation, belonging to the field of sludge treatment, comprising five steps of sludge feeding in a sludge storage pool, microwave catalytic oxidation pretreatment, high-low pressure sludge feeding, squeezing and discharging.
Description
Technical Field
The invention belongs to the field of sludge treatment, and particularly relates to a sludge dewatering method and system based on microwave electrolytic catalytic oxidation.
Background
The traditional biological treatment methods such as an activated sludge method, a biofilm method and the like realize the high-efficiency removal of organic matters through a microbial biochemical reaction process, and simultaneously discharge a large amount of excess sludge for maintaining the stable biomass of a reaction system. In recent years, with rapid development of economy and acceleration of urbanization process, sewage treatment facilities are increasingly perfected, sewage discharge amount is increased rapidly, and sewage treatment plants generate a large amount of excess sludge.
Difficulties in sludge dewatering include: (1) EPS and colloid have high hydration and charged surface characteristics, are suspended in water, are mutually exclusive and are difficult to agglomerate and settle, so that the dehydration of sludge is not facilitated; (2) the sludge floc has high organic matter content and high compressibility, and can block the pores of a filter cake in the later stage of filtration, so that the mechanical dehydration efficiency is low. In order to improve the sludge dewatering efficiency, a series of pretreatment measures are needed to condition the sludge, such as destroying the EPS of the sludge and changing the surface characteristics of the EPS; the particle size of the sludge particles is increased, and the sludge particles are promoted to destabilize, aggregate and settle. Current sludge dewatering technologies mainly include physical conditioning, chemical conditioning, biological conditioning, and combined conditioning.
At present, the main process of sludge dewatering is medicament conditioning and plate-and-frame filter pressing, the medicament generally adopts the combination of PAC and PAM, the water content can reach 60 percent, but the sludge odor is heavy, and the subsequent transportation and final disposal cost are high. The electrolytic oxidation method is that under the action of an external electric field, the anode can directly or indirectly generate the (-OH) with strong oxidation activity. The method has the advantages that: (1) the electron transfer is only carried out between the electrode and the waste water components, the generated free radicals can be directly reacted with organic pollutants in the waste water to degrade the organic pollutants without selection, and an oxidation reducing agent is not required to be additionally added, so that the problem of secondary pollution caused by additionally adding a medicament is avoided; (2) the reaction conditions can be adjusted at any time by changing the external voltage, and the controllability is strong; (3) the reaction condition is mild, and the electrochemical process can be carried out at normal temperature and normal pressure generally; (4) as a cleaning process, the equipment occupies a small area, basically has no secondary pollution and meets the requirement of environmental protection. However, due to the limitation of electrode materials, the method has low current efficiency and large energy consumption for degrading and treating organic pollutants, and thus, the method is not directly applied to actual sludge treatment.
At present, the research on the interaction between microwave and chemical reaction system has become a new international cross-science, and the research is roughly divided into two categories: (1) researching a microwave-accelerated chemical reaction mechanism from the interaction between an electromagnetic field and molecules and chemical bonds; (2) the interaction of electromagnetic waves with chemically reactive non-equilibrium systems is studied from macroscopic equivalent systems. The chemical reaction is an unbalanced system, under microwave radiation, the microwave energy absorbed by the chemical reaction system is converted into heat energy to cause the temperature of the system to rise, the temperature rise can change the chemical reaction rate, the change of the material components in the system and the temperature rise can cause the change of the electromagnetic property of the material, so that the complex dielectric coefficient of the material medium is changed, and the change of the complex dielectric coefficient of the material medium can influence the absorption and emission of electromagnetic waves. Therefore, the interaction of microwaves with chemical reaction systems must take this complexity into account. Naturally, the interaction here is mainly thermal effect, admittedly, the interaction of the non-equilibrium non-linear system of microwave often produces special effect, of course, there is also theory that the microwave and the chemical reaction system have direct action, that is, non-thermal effect. For the sludge electrolytic solution with high water content, if the temperature rise of the whole system is fast, the energy consumption is greatly increased, and the cost is increased, so the microwave and chemical reaction system is mainly reflected in non-thermal effect.
The invention discloses a microwave electrolysis catalytic oxidation sludge dewatering method, which is considered from two aspects:
(1) from the aspect of electrolyte solution conductance
To reduce the energy consumption of the sludge electrolytic solution, the ohmic voltage drop of the inter-electrode electrolyte can be reduced, and to reduce the ohmic voltage of the inter-electrode electrolyte, the conductivity between the two electrode plates must be increased. And factors affecting the conductivity of the electrolyte solution include: concentration, temperature, external field frequency, external field strength. Microwaves are just one of the external field strengths.
Microwaves can lead to an increase in conductivity, including two major theories: wien effect and electrolyte solution Onsager theory.
According to the wien effect: the conductivity of the electrolyte solution is obviously influenced by high electric field intensity and high frequency (electrophoresis effect and relaxation effect), and the field intensity of the microwave field reaches 104V.m-1In the process, the microwave energy is partially converted into intermolecular potential energy in the cluster, and the conductivity is increased.
According to the Onsager theory: the movement of the ions is influenced by the ionic atmosphere surrounding them. Since a certain time is required for ion rearrangement in the ion atmosphere (the relaxation time of 1mmol/L ion solution is about 10-7 s), when the AC frequency of the conductance measurement exceeds 10MHz, the ions move faster than the rearrangement of the ion atmosphere, the influence of the relaxation time is weakened, and the measured conductance value is increased. The possibility was predicted and soon confirmed in p.debyme and h.falkenhagen 1928, while the microwave frequency was between 0.3GHz and 300GHz, and the conductance increased with the frequency of 2.45GHz, which is greater than 10MHz, used in our daily routine.
(2) From the aspect of activation energy of electrolyte solution
Microwave is non-ionizing radiation, and the energy of a photon is very low compared with the energy of a chemical bond. For 2.450GHz microwave, the photon energy is about 10-5eV and covalent bond is about 5eV, ionic bond is about 7.6eV, hydrogen bond energy is also 0.04-0.44eV, and although microwave light quantum energy is low, it acts on a target which is not an already intact chemical bond but a process in which an old chemical bond is broken and a new chemical bond is generated. Because some chemical bonds can be greatly weakened during the formation of chemical bonds, thereby reducing the activation energy of the solution.
Disclosure of Invention
Aiming at the problems in the prior art, the invention aims to provide a sludge dewatering method and a sludge dewatering system based on microwave electrolytic catalytic oxidation.
In order to realize the purpose, the invention adopts the technical scheme that:
a sludge dewatering method based on microwave electrolytic catalytic oxidation comprises the following steps:
step 1, feeding mud in a mud storage pool: a mud inlet device is arranged on the mud storage pool, and the water content of the mud is controlled to be 96-99%;
step 2, microwave catalytic oxidation pretreatment: starting a circulating pump, a direct-current power supply, micro-nano bubbles and microwaves, and carrying out full oxidation reaction on the generated hydroxyl radicals and organic matters in the sludge in an electrolytic cell, wherein the circulating time of the pump is 30-60 min;
and 4, squeezing: after the treatment of the step 3, the membrane is in a squeezing state, a squeezing pump is started, clear water is injected into a membrane cavity of a diaphragm plate, the formed filter cake is compressed and thinned along with the gradual filling of the membrane cavity with the clear water, the water in the filter cake is further squeezed out to reach 2.0-3.0Mpa, the constant pressure squeezing is carried out for 30-60min, the squeezing procedure is finished, a liquid discharge valve is opened, and the clear water in the membrane cavity automatically flows back into a squeezing water tank for the next use;
step 5, unloading: and 4, blowing air for 15-45min after the treatment of the step 4, opening the turnover plate after the treatment, driving the push plate to retreat to the rearmost end by the oil cylinder, starting to take the pull plate by the pull plate trolley, pulling the filter plates piece by piece, dropping a filter cake formed in the cavity by gravity when the pull plate is pulled, and transporting the crushed mud cake outwards.
Further, the voltage of the direct current power supply in the step 2 is 24-36V.
Further, in the step 2, the microwave frequency is 0.915Ghz or 2.45Ghz, and the microwave power is 9-30 kw.
Further, the anode material in the electrolytic cell in the step 2 is a carbon-carbon composite material, wherein the base material is mesophase pitch-based carbon fiber, and the reinforcing phase is a highly conductive pitch impregnant.
Furthermore, the cathode material in the electrolytic bath in the step 2 is made of stainless steel.
Further, the high-low pressure mud feeding pump in the step 3 adopts a screw structure.
Further, the high-pressure and low-pressure mud feeding pump in the step 3 adopts a high-pressure pump for feeding and a low-pressure pump for discharging, wherein the pressure of the high-pressure pump is 0.6-1.6MPa, and the pressure of the low-pressure pump is 0-0.6 MPa.
A sludge dewatering system based on microwave electrolysis catalytic oxidation comprises: the device comprises an electrolytic tank, an anode and a cathode arranged in the electrolytic tank, a microwave generating device is arranged between the anode and the cathode, a micro-nano bubble generating device is arranged at the bottom of the tank, and a feeding pipe is arranged on the tank on one side close to the cathode on the electrolysis and used for feeding sludge; a discharge pipe is arranged at the bottom of the tank close to one side of the anode.
Preferably, the microwave electrolysis catalytic oxidation sludge dewatering system further comprises: store up the mud pit, advance dredge pump, pressure filter, inlet pipe and discharging pipe intercommunication store up the mud pit, advance dredge pump intercommunication and store up the mud pit, will store up mud in the mud pit and carry to the pressure filter and carry out the filter-pressing.
The invention has the beneficial effects that: (1) the method adopts the mesophase pitch-based carbon fiber composite high-conductivity enhanced phase carbon source as an anode material, and adopts microwave electrolysis and micro-nano bubbles, so that the conductivity is increased, the oxidation rate of organic matters is improved, the water content of sludge is less than 50%, and the sludge dewatering method with low energy consumption and high efficiency is realized;
(2) the invention adopts the mesophase pitch-based carbon fiber composite high-conductivity reinforced phase carbon source as the anode, the material has the advantages of low density (<2.0g/cm3), high strength, corrosion resistance, scouring resistance, high modulus, high conductivity and the like, and the oxidation peak potential of the electrode is only 1.0V; micro-nano bubbles are adopted in electrolytic oxidation treatment, so that a large amount of oxygen is dissolved in water, and more hydroxyl radicals can be generated at the anode;
(3) at present, Extracellular Polymeric Substances (EPS) and colloids are the main factors influencing sludge dewatering, the EPS and the colloids have the characteristics of high hydration, charged surface characteristics and the like, the ions or the colloids repel each other, the disorder degree is high, the anisotropy is realized, the current efficiency of the whole system is low and the energy consumption is high under the action of an electric field, but the ions or the colloids with negative charges are orderly and regularly rearranged under the action of an electromagnetic field of an external microwave, the activation energy of an electrolyte solution is reduced, the conductivity is increased, and the current efficiency of the system is greatly improved;
(4) because the water content of the sludge treated by the method is more than 97 percent, the sludge is electrolyzed to generate hydroxyl free radicals, the water filtering device has strong oxidation performance to destroy extracellular polymers and cell walls, bound combined water in the sludge is released into free water, the existence form of water in the sludge is changed, and a water filtering channel in the sludge dewatering process is constructed, so that the sludge dewatering is smoother, the stable standard reaching of the water content of a mud cake is ensured, and the microwave, the micro-nano bubbles and the carbon-carbon composite material are adopted as the anode, so that the conductivity is improved, more hydroxyl free radicals are generated, and the energy consumption is reduced.
Drawings
FIG. 1 is a schematic layout of a sludge dewatering system according to an embodiment of the present invention.
In the figure: 1. the device comprises a filter press, 2 a mud inlet pump, 3 a mud storage pool, 4 a micro-nano bubble generating device, 5 a cathode, 6 a microwave generating device, 7 a power supply, 8 an anode, 9 and a circulating pump.
Detailed Description
For a better understanding of the present invention, embodiments of the present invention are described in detail below with reference to examples, but those skilled in the art will understand that the following examples are only for illustrating the present invention and should not be construed as limiting the scope of the present invention.
Example 1:
a sludge dewatering method based on microwave electrolytic catalytic oxidation comprises the following steps:
step 1, feeding mud in a mud storage pool: a sludge inlet device is arranged on the sludge storage pool, and the water content of the sludge is controlled at 96%;
step 2, microwave catalytic oxidation pretreatment: starting a circulating pump, a direct-current power supply, micro-nano bubbles and microwaves, wherein the voltage of the direct-current power supply is 36V, the frequency of the microwaves is 0.915GHz, the power of the microwaves is 9kw, generated hydroxyl free radicals and organic matters in sludge are subjected to full oxidation reaction in an electrolytic tank, an anode material in the electrolytic tank is a carbon-carbon composite material, a base material is a mesophase pitch-based carbon fiber, a reinforcing phase is a highly conductive pitch impregnant, a cathode material is made of a stainless steel material, and the pump circulation time is 30 min;
and 4, squeezing: after the treatment of the step 3, the membrane is in a squeezing state, a squeezing pump is started, clear water is injected into a membrane cavity of a diaphragm plate, the formed filter cake is compressed and thinned along with the gradual filling of the membrane cavity with the clear water, the water in the filter cake is further squeezed out to reach 2.0Mpa, the constant pressure squeezing is carried out for 60min, the squeezing program is finished, a liquid discharge valve is opened, and the clear water in the membrane cavity automatically flows back into a squeezing water tank for the next use;
step 5, unloading: and 4, blowing air for 45min after the treatment of the step 4, opening the turnover plate after the treatment, driving the push plate to retreat to the rearmost end by the oil cylinder, starting to take the pull plate by the pull plate trolley, pulling the filter plates piece by piece, dropping a filter cake formed in the cavity by gravity when the filter plates are pulled, and transporting the broken filter cake outwards.
Example 2:
a sludge dewatering method based on microwave electrolytic catalytic oxidation comprises the following steps:
step 1, feeding mud in a mud storage pool: a sludge inlet device is arranged on the sludge storage pool, and the water content of the sludge is controlled to be 99%;
step 2, microwave catalytic oxidation pretreatment: starting a circulating pump, a direct-current power supply, micro-nano bubbles and microwaves, wherein the voltage of the direct-current power supply is 24V, the frequency of the microwaves is 2.45Ghz, the power of the microwaves is 30kw, generated hydroxyl radicals and organic matters in sludge are subjected to full oxidation reaction in an electrolytic tank, an anode material in the electrolytic tank is a carbon-carbon composite material, a base material is a mesophase pitch-based carbon fiber, a reinforcing phase is a highly conductive pitch impregnant, a cathode material is made of a stainless steel material, and the pump circulation time is 40 min;
and 4, squeezing: after the treatment of the step 3, the membrane is in a squeezing state, a squeezing pump is started, clear water is injected into a membrane cavity of a diaphragm plate, the formed filter cake is compressed and thinned along with the gradual filling of the membrane cavity with the clear water, the water in the filter cake is further squeezed out to reach 3.0Mpa, the constant pressure squeezing is carried out for 30min, the squeezing program is finished, a liquid discharge valve is opened, and the clear water in the membrane cavity automatically flows back into a squeezing water tank for the next use;
step 5, unloading: and 4, blowing air for 15min after the treatment of the step 4, opening the turnover plate after the treatment, driving the push plate to retreat to the rearmost end by the oil cylinder, starting to take the pull plate by the pull plate trolley, pulling the filter plates piece by piece, dropping a filter cake formed in the cavity by gravity when the filter plates are pulled, and transporting the broken filter cake outwards.
Example 3:
a sludge dewatering method based on microwave electrolytic catalytic oxidation comprises the following steps:
step 1, feeding mud in a mud storage pool: a sludge inlet device is arranged on the sludge storage pool, and the water content of the sludge is controlled to be 98%;
step 2, microwave catalytic oxidation pretreatment: starting a circulating pump, a direct-current power supply, micro-nano bubbles and microwaves, wherein the voltage of the direct-current power supply is 30V, the frequency of the microwaves is 2.45Ghz, the power of the microwaves is 25kw, the generated hydroxyl free radicals and organic matters in sludge are subjected to full oxidation reaction in an electrolytic tank, an anode material in the electrolytic tank is a carbon-carbon composite material, a base material is a mesophase pitch-based carbon fiber, a reinforcing phase is a highly conductive pitch impregnant, a cathode material is made of a stainless steel material, and the pump circulation time is 60 min;
and 4, squeezing: after the treatment of the step 3, the membrane is in a squeezing state, a squeezing pump is started, clear water is injected into a membrane cavity of a diaphragm plate, the formed filter cake is compressed and thinned along with the gradual filling of the membrane cavity with the clear water, the water in the filter cake is further squeezed out to reach 2.5Mpa, the squeezing is carried out for 45min at constant pressure, a squeezing program is finished, a liquid discharge valve is opened, and the clear water in the membrane cavity automatically flows back into a squeezing water tank for the next use;
step 5, unloading: and 4, blowing air for 30min after the treatment of the step 4, opening the turnover plate after the treatment, driving the push plate to move back to the rearmost end by the oil cylinder, starting to take the pull plate by the pull plate trolley, pulling the filter plates piece by piece, dropping a filter cake formed in the cavity by gravity when the filter plates are pulled, and transporting the broken filter cake outwards.
Comparative example 1:
comparative example 1 differs from example 1 in that the microwave program is not started and the other steps are not changed.
Comparative example 2:
the difference between the comparative example 2 and the example 1 is that the micro-nano bubbles are not opened, and other steps are not changed.
Comparative example 3:
the difference between the comparative example 3 and the example 1 is that the microwave and the micro-nano bubbles are not opened, and other steps are not changed.
The effects obtained by the sludge dewatering methods of examples 1 to 3 and comparative examples 1 to 2 were compared, and the results of the comparison are shown in Table 1.
TABLE 1
As can be seen from Table 1, the mesophase pitch-based carbon fiber composite high-conductivity enhanced phase carbon source is used as an anode material, and microwave electrolysis and micro-nano bubbles are adopted, so that the conductivity is increased, the oxidation rate of organic matters is increased, the water content of sludge is below 50%, a low-energy-consumption and high-efficiency sludge dewatering method is realized, further analysis is carried out, the water content of a mud cake obtained by a sludge dewatering process without opening the microwave is above 50%, the water content of the mud cake without opening the micro-nano bubbles is obviously higher than that after opening, and the water content of the mud cake obtained by neither opening the microwave nor the micro-nano bubbles is more than 60%, which shows that the dewatering effect of the invention can be improved by the microwave and micro-nano bubble processes, and particularly, the water content of the sludge.
Example 4:
as shown in fig. 1, the present invention provides a sludge dewatering system based on microwave electrolytic catalytic oxidation, comprising: the microwave generating device 6 is arranged between the anode 8 and the cathode 5, the anode 8 is made of a mesophase pitch-based carbon fiber composite high-conductivity material, the microwave generating device 6 comprises a microwave source and wave guide tubes which are connected, the wave guide tubes are vertically arranged in the electrolytic tank between the anode 8 and the cathode 5, the outer parts of the wave guide tubes are coated by polytetrafluoroethylene to play a role in water resistance and wave transmission, the bottom of the electrolytic tank is provided with a micro-nano bubble generating device 4, and a feeding pipe is arranged on a side tank close to the cathode 5 in electrolysis and used for feeding sludge; a discharge pipe is arranged at the bottom of the groove at one side close to the anode 8. Understandably, by adopting the mesophase pitch-based carbon fiber to compound a highly conductive enhanced phase carbon source as an anode material and adopting microwave electrolysis and micro-nano bubbles, the compound action increases the conductivity and improves the oxidation rate of organic matters.
Preferably, the microwave electrolysis catalytic oxidation sludge dewatering system further comprises: store up mud pit 3, advance dredge pump 2, pressure filter 1, inlet pipe and discharging pipe intercommunication store up mud pit 3, advance dredge pump 2 intercommunication and store up mud pit 3, will store up mud among the mud pit 3 and carry to pressure filter 1 and carry out the filter-pressing. After the sludge after the electrolysis treatment is subjected to filter pressing, the water content of the sludge reaches below 50 percent.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without the use of the inventive faculty. Therefore, the present invention is not limited to the above-described embodiments. Those skilled in the art should appreciate that many modifications and variations are possible in light of the above teaching without departing from the scope of the invention.
Claims (9)
1. A sludge dewatering method based on microwave electrolytic catalytic oxidation is characterized by comprising the following steps:
step 1, feeding mud in a mud storage pool: a mud inlet device is arranged on the mud storage pool, and the water content of the mud is controlled to be 96-99%;
step 2, microwave catalytic oxidation pretreatment: starting a circulating pump, a direct-current power supply, micro-nano bubbles and microwaves, and carrying out full oxidation reaction on the generated hydroxyl radicals and organic matters in the sludge in an electrolytic cell, wherein the circulating time of the pump is 30-60 min;
step 3, high-low pressure mud feeding: the sludge treated in the step 2 enters a filter press by a high-pressure and low-pressure sludge inlet pump, is controlled by a frequency converter, is compressed by the filter press, is started to pump the sludge into the filter press, and is gradually increased in filtering pressure along with the gradual formation of a filter cake, and is subjected to constant pressure for 20-30min after the feeding pressure reaches 1.6-2.5Mpa through the signal feedback of a pressure transmitter, and then enters a squeezing state; in the feeding process, filtrate is discharged from four blind flow holes, and leaked liquid between filter plates is received by the turning plate and is discharged through the small grooves on the two sides;
and 4, squeezing: after the treatment of the step 3, the membrane is in a squeezing state, a squeezing pump is started, clear water is injected into a membrane cavity of a diaphragm plate, the formed filter cake is compressed and thinned along with the gradual filling of the membrane cavity with the clear water, the water in the filter cake is further squeezed out to reach 2.0-3.0Mpa, the constant pressure squeezing is carried out for 30-60min, the squeezing procedure is finished, a liquid discharge valve is opened, and the clear water in the membrane cavity automatically flows back into a squeezing water tank for the next use;
step 5, unloading: and 4, blowing air for 15-45min after the treatment of the step 4, opening the turnover plate after the treatment, driving the push plate to retreat to the rearmost end by the oil cylinder, starting to take the pull plate by the pull plate trolley, pulling the filter plates piece by piece, dropping a filter cake formed in the cavity by gravity when the pull plate is pulled, and transporting the crushed mud cake outwards.
2. The sludge dewatering method based on microwave electrolytic catalytic oxidation as claimed in claim 1, wherein the DC power supply voltage in step 2 is 24-36V.
3. The sludge dewatering method based on microwave electrolytic catalytic oxidation according to claim 1, wherein the microwave frequency in step 2 is 0.915Ghz or 2.45Ghz, and the microwave power is 9-30 kw.
4. The sludge dewatering method based on microwave electrolytic catalytic oxidation as claimed in claim 1, characterized in that the anode material in the step 2 electrolytic tank is carbon-carbon composite material, wherein the base material is mesophase pitch-based carbon fiber, and the reinforcement phase is highly conductive pitch impregnant.
5. The sludge dewatering method based on microwave electrolytic catalytic oxidation as claimed in claim 1, characterized in that the cathode material in the step 2 electrolytic cell is stainless steel.
6. The sludge dewatering method based on microwave electrolytic catalytic oxidation as claimed in claim 1, wherein the high and low pressure sludge feeding pump in step 3 is of screw structure.
7. The sludge dewatering method based on microwave electrolytic catalytic oxidation as claimed in claim 1, wherein the high and low pressure sludge feeding pump in step 3 is a high pressure pump for feeding and a low pressure pump for discharging, wherein the high pressure pump is 0.6-1.6Mpa, and the low pressure pump is 0-0.6 Mpa.
8. A sludge dewatering system based on microwave electrolysis catalytic oxidation is characterized by comprising: the device comprises an electrolytic tank, an anode and a cathode arranged in the electrolytic tank, a microwave generating device is arranged between the anode and the cathode, a micro-nano bubble generating device is arranged at the bottom of the tank, and a feeding pipe is arranged on the tank on one side close to the cathode on the electrolysis and used for feeding sludge; a discharge pipe is arranged at the bottom of the tank close to one side of the anode.
9. The microwave electrolytic catalytic oxidation-based sludge dewatering system according to claim 8, wherein the microwave electrolytic catalytic oxidation sludge dewatering system further comprises: store up the mud pit, advance dredge pump, pressure filter, inlet pipe and discharging pipe intercommunication store up the mud pit, advance dredge pump intercommunication and store up the mud pit, will store up mud in the mud pit and carry to the pressure filter and carry out the filter-pressing.
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| CN206783508U (en) * | 2017-04-28 | 2017-12-22 | 南京万德斯环保科技股份有限公司 | Sludge conditioning deep dehydration handles disposal system |
| CN109626676A (en) * | 2019-02-15 | 2019-04-16 | 北京今大禹环境技术股份有限公司 | A method of reverse osmosis concentrated organic pollutants are handled using microwave-electro-catalysis group technology |
| CN111333295A (en) * | 2020-02-19 | 2020-06-26 | 西安理工大学 | Electrochemical process method for promoting deep dehydration of sludge |
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