CN116253480A - Method for separating organic matters and inorganic matters in sludge - Google Patents

Abstract

The invention relates to a method for separating organic matters and inorganic matters in sludge, which comprises the following steps: sterilizing, deodorizing, ultrasonic vibrating, pre-treating, floatation, thickening, dewatering and filtering. The invention can realize the high-efficiency separation of fiber velvet and mud in the mud slurry, respectively obtain inorganic matters and organic matters, and has the advantages of high separation efficiency, good quality of separation products, wide application and the like.

Description

Method for separating organic matters and inorganic matters in sludge

Technical Field

The invention belongs to the technical field of chemical industry, and particularly relates to a method for separating organic matters and inorganic matters in sludge.

Background

Often inorganic and organic components of the slurry are mixed together and are difficult to separate. Taking the printing and dyeing mud as an example, inorganic matters comprise dye residues, mud and mixed mud of calcium oxide and ferric oxide added in the water treatment process, and organic matters comprise fiber velvet which is shed from the printing and dyeing matters in the printing and dyeing process, wherein the fiber velvet is bonded with the mud, capillary velvet of the fiber velvet is tightly polymerized, and inorganic matters and organic matters are difficult to separate in a conventional mode and an existing system, and if the chemical treatment is used, the later utilization is influenced.

Disclosure of Invention

In view of the problems existing in the prior art, the invention provides a method for separating organic matters and inorganic matters in sludge and a sludge organic matter and inorganic matter separation system, which realize the efficient separation of inorganic matters and organic matters in sludge slurry in a physical mode, and the separated products can not influence the later use.

The technical scheme for solving the technical problems is as follows:

the invention provides a method for separating organic matters and inorganic matters in sludge, which comprises the following steps: sterilizing and deodorizing, ultrasonic vibration, pretreatment, floatation, thickening, dehydration and filtration;

specifically, the steps are as follows:

(1) Sterilizing and deodorizing the sludge slurry;

(2) Carrying out ultrasonic vibration on the sludge slurry;

(3) Pretreating the sludge slurry subjected to ultrasonic vibration, and mixing the sludge slurry with a flotation reagent to obtain mixed slurry;

(4) Floating the mixed slurry to obtain organic matter slurry and inorganic matter slurry;

(5) Respectively thickening the organic matter slurry and the inorganic matter slurry;

(6) And respectively dehydrating and filtering the thickened organic matter slurry and the inorganic matter slurry.

The beneficial effects of the invention are as follows: the invention can realize the high-efficiency separation of the fiber velvet and the mud in the printing and dyeing mud to obtain inorganic matters and organic matters, and has the advantages of high separation efficiency, good quality of separation products, wide application and the like. The particle water is broken by the action of ultrasonic vibration, and the fiber velvet and the mud are separated at one time, so that the method has the advantage of good separation effect.

On the basis of the technical scheme, the invention can be improved as follows.

Further, in the step (2), the ultrasonic vibration parameter is 15kHz-20kHz, and the sludge slurry passing speed is 5m/s.

The beneficial effects of adopting the further scheme include that the parameters are selected to facilitate the instant separation of the sludge from the fiber in the sludge.

Further, in the step (3), the flotation reagent comprises No. 0 diesel oil, a capturing agent and sodium dodecyl sulfate, wherein the mass ratio of the No. 0 diesel oil to the capturing agent to the sodium dodecyl sulfate is 40:55:5; based on the solid content, the flotation reagent is added according to the proportion of 4kg/t, and after the flotation reagent is added into the sludge slurry, the mixture is stirred for 5 seconds to fully mix the sludge slurry.

The further scheme has the beneficial effects that the selection of the parameters can achieve both economical and flotation effects, and has the advantages of good economical efficiency and good flotation effect.

Further, in the step (5), the concentration of the organic matter slurry and the inorganic matter slurry after the thickening respectively reaches 60%.

The adoption of the further scheme has the beneficial effects that the adoption of the parameters can ensure that the working efficiency of the entering filter press is high.

Further, in the step (6), the water content of the organic matter filter cake after dehydration filtration is 40%, and the water content of the inorganic matter filter cake is 38%.

The beneficial effects of adopting the further scheme include that if the water content is too large, the transportation and the utilization are not facilitated, and the water content of the filter cake is controlled in a proper range, so that the direct transportation and the utilization of the filter cake are facilitated.

Further, the sludge slurry of the present invention includes printing sludge and/or municipal sludge.

Further, the method comprises the following steps:

(1) Sterilizing and deodorizing: an electron beam irradiation sterilization device and a deodorization device are arranged in the sludge slurry conveying pipeline and are used for sterilizing and deodorizing the sludge;

(2) Ultrasonic vibration: carrying out ultrasonic vibration on the sludge slurry by adopting an ultrasonic vibration device, wherein the ultrasonic vibration parameter is 15kHz-20kHz, and the passing speed of the sludge slurry is 5m/s;

(3) Pretreatment: overflowing the sludge slurry subjected to ultrasonic vibration to a pretreatment device, wherein the pretreatment device is provided with an automatic metering and flotation reagent adding device, the dosage of the flotation reagent is 4kg/t of the solid content, and stirring is carried out for 5 seconds to obtain mixed slurry;

(4) And (3) flotation: overflowing the mixed slurry to a flotation device, wherein a flotation column of the flotation device is used for sucking bubbles generated by an ejector to adhere organic matters to an overflow port flow from a bubble arm to the highest point of a flotation foam layer to obtain organic material slurry; the bottom flow discharged slurry of the flotation column is inorganic slurry;

(5) And (3) thickening: the organic material slurry enters a thickening device for thickening organic materials through a collecting pipeline, wherein the number of the thickening devices is two, and the thickening device is respectively used for thickening organic material slurry and inorganic material slurry; adopting one of the thickening devices to thicken the organic material slurry, wherein the concentration of the thickened organic material slurry reaches 60%; the inorganic material slurry overflows to a thickening device of the inorganic matters, the inorganic material slurry is thickened through the thickening device, and the concentration of the thickened inorganic material slurry reaches 60%;

(6) Dehydrating and filtering: the number of the dehydration filtering devices is two, and the dehydration filtering devices are adopted to respectively dehydrate and filter the thickened organic matter slurry and the inorganic matter slurry to respectively obtain an organic matter filter cake and an inorganic matter filter cake; the thickened organic material slurry is conveyed to a dehydration filtering device through a slurry pump; the thickened inorganic matter slurry is pumped to another dehydration filtering device through a slurry pump; the water content of the organic filter cake after dehydration and filtration is 40 percent, and the water content of the inorganic filter cake is 38 percent.

Further, the method further comprises the step of carrying out microwave treatment on the sludge slurry before the ultrasonic vibration step.

The invention provides a sludge organic matter and inorganic matter separation system, which comprises: the device comprises an ultrasonic vibration device, a pretreatment device, a flotation device, a thickening device and a dehydration filtering device; the slurry outlet of the ultrasonic vibration device is connected with the inlet of the pretreatment device, the outlet of the pretreatment device is connected with the inlet of the flotation device, the outlet of the flotation device is connected with the inlet of the thickening device, and the outlet of the thickening device is connected with the inlet of the dehydration filtering device.

The beneficial effects of adopting the technical scheme include: the organic matters and the inorganic matters in the sludge can be separated by adopting the ultrasonic vibration device and the pretreatment device, a large amount of bubbles are generated in the flotation process of the pretreated sludge slurry through the flotation device, the organic matters are adhered to the bubble walls and overflow out of the organic matters along with overflow ports of the flotation device, and the inorganic matters are remained in the flotation tank.

Further, the ultrasonic vibration device comprises a shell, and an ultrasonic vibration rod, a current stabilizer plate and a ceramic bubble generator set which are positioned in the shell; the ultrasonic vibration bars are arranged between the steady flow plates at intervals; the shell is tubular, and is provided with a slurry inlet, a slurry outlet and a slurry overflow preventing groove, wherein the slurry inlet is connected with a feeding pipeline, the slurry outlet is connected with a discharging pipeline, and the discharging pipeline is provided with a control valve.

The beneficial effects of adopting the technical scheme include: in the production process, the sludge slurry adopts a pipeline to convey high pressure and strong impact force, and by arranging the flow stabilizing plate, the working condition of the ultrasonic vibration device can be ensured to work in a state that the liquid level is stable, and the working efficiency of the ultrasonic vibration device is normal.

Further, the number of the ultrasonic vibration bars, the steady flow plates and the ceramic bubble generator groups is multiple.

Further, the casing still is connected with the intake pipe, and the intake pipe is connected with anti-settling nozzle.

The beneficial effects of adopting the technical scheme include: the air inlet pipe is used for floating sediment at the bottom of the vibration device when the device is started, and the sediment is prevented when the device is in a working state.

Further, the device also comprises a sterilizing and deodorizing device which is arranged in the feeding pipeline and is used for sterilizing and deodorizing the sludge slurry.

Further, the device also comprises a microwave device for microwave treatment of the sludge slurry.

Further, the pretreatment device is also provided with a reagent adder and a stirrer, wherein the reagent adder is used for adding a flotation reagent into the pretreatment adder, and the stirrer is used for uniformly mixing the flotation reagent with the slurry.

Further, the flotation device comprises a flotation column working chamber and a flotation column, wherein the flotation column working chamber is provided with an overflow port and a bottom slag discharge port, the flotation column is positioned in the flotation column working chamber, and the flotation column is provided with a self-priming jet device and a ceramic bubble generator; after entering the flotation column working chamber from the inlet of the flotation column working chamber, the mixed slurry is treated by a self-priming jet device and a ceramic bubble generator, overflows from the top of the flotation column working chamber to obtain organic material slurry, and obtains inorganic material slurry from the bottom of the flotation column working chamber.

The beneficial effects of adopting the technical scheme include: by setting up the flotation device, can realize the separation of organic matter and inorganic matter.

Drawings

FIG. 1 is a schematic diagram of a sludge organic-inorganic matter separation system.

Fig. 2 is a schematic structural view of an ultrasonic vibration device.

FIG. 3 is a process flow diagram for separating organic and inorganic matters in printing and dyeing sludge.

In fig. 1 and 2, the list of components represented by the respective reference numerals is as follows:

1. the device comprises an ultrasonic vibration device 11, a shell 12, an ultrasonic vibration rod 13, a current stabilizer 14, a ceramic bubble generator group 15, a slurry inlet 16, a slurry outlet 17, a slurry overflow preventing groove 18, a control valve 2, a pretreatment device 3, a flotation device 4, a thickening device 5 and a dehydration filtering device.

Detailed Description

The principles and features of the present invention are described below with reference to the drawings, the examples are illustrated for the purpose of illustrating the invention and are not to be construed as limiting the scope of the invention.

As shown in fig. 1 and 2, the invention provides a sludge organic matter and inorganic matter separation system, which comprises an ultrasonic vibration device 1, a pretreatment device 2, a flotation device 3, a thickening device 4 and a dehydration filtering device 5; the slurry outlet 16 of the ultrasonic vibration device 1 is connected with the inlet of the pretreatment device 2, the outlet of the pretreatment device 2 is connected with the inlet of the flotation device 3, the outlet of the flotation device 3 is connected with the inlet of the thickening device 4, and the outlet of the thickening device 4 is connected with the inlet of the dehydration filtering device 5.

The connection can be direct connection or indirect connection (such as through a conveying pipeline, a conveying pump and the like), and can be realized by means of the height difference of the positions (such as by adopting an overflow mode and the like), so that materials can enter from one device to the other device, and a specific connection mode can be selected according to actual conditions during implementation.

Taking printing and dyeing slurry as an example, conveying the slurry to an ultrasonic vibration device 1 through a feeding pipeline, breaking the wall of slurry particles by the action of the ultrasonic vibration device 1, finishing the separation of fiber velvet and slurry at one time, conveying the slurry to a pretreatment device 2 through a discharging pipeline or overflow mode, adding a flotation reagent into the pretreatment device 2 and uniformly mixing the slurry to form mixed slurry, conveying the mixed slurry to a flotation device 3 through a conveying pipeline or overflow mode for flotation, respectively obtaining organic slurry and inorganic slurry, conveying the organic slurry to a thickening device 4 for thickening through the conveying pipeline or overflow mode, and conveying the thickened organic slurry to a dehydration filtering device 5 through the conveying pipeline or overflow mode to obtain an organic filter cake. The inorganic material slurry is conveyed to a thickening device 4 for thickening through a conveying pipeline or an overflow mode, and the thickened inorganic material slurry is conveyed to a dewatering and filtering device 5 through the conveying pipeline or the overflow mode, so that an inorganic material filter cake is obtained.

The ultrasonic vibration device 1 comprises a shell 11, an ultrasonic vibration rod 12, a current stabilizer 13 and a ceramic bubble generator group 14, wherein the ultrasonic vibration rod 12, the current stabilizer 13 and the ceramic bubble generator group are positioned in the shell; the number of the ultrasonic vibration bars 12, the steady flow plates 13 and the ceramic bubble generator groups 14 is multiple; the ultrasonic vibration bars 12 are arranged between the steady flow plates 13 at intervals; the casing 11 is the tubulose, is equipped with ground paste entry 15, ground paste export 16 and prevents ground paste overflow launder 17, ground paste entry 15 and ground paste export 16 can be located the homonymy of casing 11, also can be located the both sides of casing 11, and ground paste entry 15 is connected with the charge-in pipeline, and ground paste export 16 is connected with the ejection of compact pipeline, and the ejection of compact pipeline is equipped with control valve 18, and casing 11 still is connected with the intake pipe, and intake pipe connection has prevents the sediment nozzle, and the intake pipe is used for the sediment mud of vibrating device bottom to float when starting up, prevents the mud sediment when device operating condition.

In the production process, the sludge slurry adopts a pipeline to convey high pressure and strong impact force, and by arranging the flow stabilizing plate, the working condition of the ultrasonic vibration device can be ensured to work in a state that the liquid level is stable, and the working efficiency of the ultrasonic vibration device is normal.

In an embodiment, the housing 11 may be tubular, 2 meters in length, diameter phi 273mm. The dehydration filtration device 5 may be a plate and frame filter press.

An electron beam irradiation sterilization device and a deodorization device are also arranged in the feeding pipeline and are used for sterilizing and deodorizing the sludge slurry.

The pretreatment device 2 is also provided with a reagent adder for adding a flotation reagent into the pretreatment adder, and a stirrer for uniformly mixing the flotation reagent with the slurry.

The flotation device 3 comprises a flotation column working chamber and a flotation column, wherein the flotation column working chamber is provided with an overflow port and a bottom slag discharge port, the flotation column is positioned in the flotation column working chamber, and the flotation column is provided with a self-priming jet device and a ceramic bubble generator; after entering the flotation column working chamber from the inlet of the flotation column working chamber, the mixed slurry is treated by a self-priming jet device and a ceramic bubble generator, overflows from the top of the flotation column working chamber to obtain organic material slurry, and obtains inorganic material slurry from the bottom of the flotation column working chamber.

As shown in fig. 3, taking printing sludge as an example, the present invention provides a method for separating organic matters and inorganic matters in sludge, comprising the following steps:

(1) Sterilizing and deodorizing: an electron beam irradiation sterilization device and a deodorization device are arranged in the sludge slurry conveying pipeline and are used for sterilizing and deodorizing the sludge slurry; the electron beam irradiation sterilization device has the deodorizing and sterilizing effects at the same time when the pipeline irradiation time is about 3 seconds, and the deodorizing can be carried out through the ozone device when the sludge slurry generates peculiar smell in the water treatment process, so that the subsequent separation of organic matters and inorganic matters can be more widely utilized.

(2) Ultrasonic vibration: ultrasonic vibration is carried out on the sludge slurry by adopting an ultrasonic vibration device 1, the ultrasonic vibration parameter is 15kHz-20kHz, the passing speed of the sludge slurry is 5m/s, and the wall breaking of particle water is realized under the action of the ultrasonic vibration device 1, so that the separation of fiber velvet and sludge is completed once; the range of 15kHz-20kHz is selected, which is beneficial to the instant separation of mud fibers in the sludge.

(3) Pretreatment: the sludge slurry after ultrasonic vibration overflows to a pretreatment device 2, the pretreatment device 2 is provided with an automatic metering and flotation reagent adding device (the dosage of the flotation reagent is 4kg/t of the solid content), and the mixed slurry is obtained after stirring for 5 seconds; the 4kg/t economy and flotation effect are good.

(4) And (3) flotation: overflowing the mixed slurry to a flotation device 3, wherein a flotation column of the flotation device 3 is used for sucking bubbles generated by an ejector to adhere organic matters to an overflow port flow from a bubble arm to the highest point of a flotation foam layer to obtain organic material slurry; the bottom flow of the flotation column discharges slurry as inorganic materials; in the flotation process, the concentration of the sludge raw slurry is about 8% -15% of the solid content, and the economical operation can be ensured by adopting the condition.

(5) And (3) thickening: the organic material slurry enters a thickening device 4 for thickening the organic material through a collecting pipeline, and the number of the thickening devices 4 is two and the thickening devices are respectively used for thickening the organic material slurry and the inorganic material slurry; one of the thickening devices 4 is adopted to thicken the organic material slurry, and the concentration of the thickened organic material slurry reaches 60 percent so as to ensure that the working efficiency of the organic material slurry entering the filter press is high; the inorganic material slurry overflows to the inorganic material thickening device 4, the inorganic material slurry is thickened by the thickening device 4, and the concentration of the thickened inorganic material slurry reaches 60 percent. The concentration after the concentration is 60 percent, and the high working efficiency of entering the filter press can be ensured

(6) Dehydrating and filtering: the number of the dewatering and filtering devices 5 is two, and the dewatering and filtering devices 5 are adopted to respectively dewater and filter the thickened organic matter slurry and the inorganic matter slurry to respectively obtain an organic matter filter cake and an inorganic matter filter cake; the thickened organic material slurry is conveyed to a dehydration filtering device 5 through a slurry pump; the thickened inorganic slurry is pumped to another dehydration filtering device 5 through a slurry pump; the water content of the organic filter cake after dehydration and filtration is 40 percent, and the water content of the inorganic filter cake is 38 percent. If the water content is too large, the filter cake is not beneficial to transportation and utilization, and the water content of the filter cake is controlled in a proper range, so that the filter cake is beneficial to direct transportation and utilization.

(7) The application of the organic matter filter cake is as follows: the organic matter is contained, and the organic matter can be used for preparing ecological fuel particles, and the heating value is as follows: 4000 large cards; the inorganic matter filter cake uses: contains inorganic matters and can be used for preparing curbstones, water permeable bricks, roadbed materials and sintered ceramsite materials.

The device and the method can also be used for separating organic matters from inorganic matters. Taking the municipal sludge with the heat value of about 900-1600 kilocalories per se as an example, the heat value of the organic matters separated by the method provided by the invention is about 2300-2900 kilocalories.

The microwave device can be used for cracking chemical fibers and cleavable substances in the sludge slurry, including dye coalescence residues and the like, before the sludge slurry enters the ultrasonic vibration device, so that the sludge slurry is easier to separate in the ultrasonic vibration device. The microwave radiation can change the physical and chemical characteristics of the sludge, so that the flocculation is destroyed, microbial cells are broken and organic matters are released, and polarized dipole ions in the sludge can generate intense vibration in a microwave electric field due to the action of an alternating electric field to generate friction when the sludge is irradiated by the microwave, so that the physical and chemical properties of the sludge are changed.

The invention adopts a microwave physical method and an ultrasonic technology to solve the problem of separating fiber velvet from mud, and then adopts a floatation mode to achieve the aim of separating and extracting inorganic matters from organic matters. The fiber velvet in the sludge is instantaneously peeled from the sludge by the high-power ultrasonic vibration rod while the sludge passes through the electron beam irradiation sterilization pipeline device, the instantaneous separation effect is obvious, and the problem that the water content of a filter cake after the sludge is dehydrated is lower than 40% is solved.

The following description is made by way of specific examples.

Examples

The method for separating the organic matters and the inorganic matters in the printing and dyeing sludge comprises the following steps:

(1) Sterilizing and deodorizing: an electron beam irradiation sterilization device and a deodorization device are arranged in a printing and dyeing sludge slurry conveying pipeline and are used for sterilizing and deodorizing the printing and dyeing sludge;

(2) Ultrasonic vibration: carrying out ultrasonic vibration on the printing and dyeing sludge slurry by adopting an ultrasonic vibration device 1, wherein the parameter of the ultrasonic vibration is 15kHz-20kHz, the passing speed of the printing and dyeing sludge slurry is 5m/s, and the breaking of the wall of the particle water fiber velvet and the separation of the sludge are completed once under the action of the ultrasonic vibration device 1;

(3) Pretreatment: overflowing the printing and dyeing sludge slurry subjected to ultrasonic vibration to a pretreatment device 2, wherein the pretreatment device 2 is provided with an automatic metering and flotation reagent adding device, the flotation reagent dosage is added according to the solid content of 4kg/t, and stirring is carried out for 5 seconds to obtain mixed slurry;

(4) And (3) flotation: overflowing the mixed slurry to a flotation device 3, wherein a flotation column of the flotation device 3 is used for sucking bubbles generated by an ejector to adhere organic matters to an overflow port flow from a bubble arm to the highest point of a flotation foam layer to obtain organic material slurry; the bottom flow of the flotation column discharges slurry as inorganic materials;

(5) And (3) thickening: the organic material slurry enters a thickening device 4 for thickening organic materials through a collecting pipeline, wherein the number of the thickening devices 4 is two, and the thickening devices are respectively used for thickening organic material slurry and inorganic material slurry; adopting one of the thickening devices 4 to thicken the organic material slurry, wherein the concentration of the thickened organic material slurry reaches 60%; the inorganic material slurry overflows to a thickening device 4 of the inorganic material, the inorganic material slurry is thickened through the thickening device 4, and the concentration of the thickened inorganic material slurry reaches 60%;

(6) Dehydrating and filtering: the number of the dewatering and filtering devices 5 is two, and the dewatering and filtering devices 5 are adopted to respectively dewater and filter the thickened organic matter slurry and the inorganic matter slurry to respectively obtain an organic matter filter cake and an inorganic matter filter cake; the thickened organic material slurry is conveyed to a dehydration filtering device 5 through a slurry pump; the thickened inorganic slurry is pumped to another dehydration filtering device 5 through a slurry pump; the water content of the organic filter cake after dehydration and filtration is 40 percent, and the water content of the inorganic filter cake is 38 percent.

The application of the organic matter filter cake is as follows: the organic matter is contained, and the organic matter can be used for preparing ecological fuel particles, and the heating value is as follows: 4000 large cards; the inorganic matter filter cake uses: contains inorganic matters and can be used for preparing curbstones, water permeable bricks, roadbed materials and sintered ceramsite materials.

In the step (2), the printing and dyeing sludge may be sludge generated by wastewater treatment of printing and dyeing enterprises, and the printing and dyeing sludge has higher inert substances, for example, the sludge generated by washing and bleaching wastewater of jeans wear contains sand, organic fiber velvet, dye residues and the like, and has lower heat value.

In the step (3), the components of the flotation reagent comprise No. 0 diesel oil, a trapping agent and sodium dodecyl sulfate, and the mass ratio of the No. 0 diesel oil to the trapping agent to the sodium dodecyl sulfate is 40:55:5, capture agents are commercially available.

The invention can realize the high-efficiency separation of fiber velvet and mud in the mud slurry by reasonably arranging the separation system and the separation method, and obtain inorganic matters and organic matters, and has the advantages of high separation efficiency, good quality of separation products, wide application and the like. The inventors found in the study that the conditions of the ultrasonic vibration process have an influence on the separation result, for example, the conditions of adjusting the parameter of ultrasonic vibration to 10kHz while the mud passing speed is 2.5m/s, the parameter of ultrasonic vibration to 30kHz while the mud passing speed is 5m/s, the parameter of ultrasonic vibration to 15kHz while the mud passing speed is 10m/s, and under the same other conditions, the conditions of adopting the parameter of ultrasonic vibration to 15kHz-20kHz while the mud passing speed is 5m/s are better. In the flotation process, the amount of the flotation agent can also affect the separation result, for example, the amount of the flotation agent is respectively adjusted to be 1kg/t, 2kg/t, 5kg/t and 6kg/t, and under the condition that other conditions are the same, the effect of adding the flotation agent by adopting the proportion of 4kg/t is better.

The foregoing description of the preferred embodiments of the invention is not intended to limit the invention to the precise form disclosed, and any such modifications, equivalents, and alternatives falling within the spirit and scope of the invention are intended to be included within the scope of the invention.

Claims (10)

1. A method for separating organic matters and inorganic matters in sludge, which is characterized by comprising the following steps:

(1) Sterilizing and deodorizing the sludge slurry;

(2) Carrying out ultrasonic vibration on the sludge slurry;

(3) Pretreating the sludge slurry subjected to ultrasonic vibration, and mixing the sludge slurry with a flotation reagent to obtain mixed slurry;

(4) Floating the mixed slurry to obtain organic matter slurry and inorganic matter slurry;

(5) Respectively thickening the organic matter slurry and the inorganic matter slurry;

(6) And respectively dehydrating and filtering the thickened organic matter slurry and the inorganic matter slurry.

2. The method according to claim 1, wherein in the step (2), the ultrasonic vibration has a parameter of 15kHz to 20kHz and the slurry passing speed is 5m/s.

3. A method according to claim 1, wherein in step (3), the flotation reagent comprises No. 0 diesel, a scavenger and sodium dodecyl sulfate, and the mass ratio of No. 0 diesel, a scavenger and sodium dodecyl sulfate is 40:55:5; the amount of the flotation reagent is added according to the proportion of 4kg/t based on the solid content, and the mixture is stirred for 5 seconds and mixed after the flotation reagent is added into the sludge slurry.

4. A method according to claim 1, wherein in step (5), the concentration of the thickened organic slurry and the inorganic slurry respectively reaches 60%; in the step (6), the water content of the dehydrated and filtered organic filter cake is 40%, and the water content of the inorganic filter cake is 38%.

5. The method according to any one of claims 1-4, characterized by the steps of:

(1) Sterilizing and deodorizing: an electron beam irradiation sterilization device and a deodorization device are arranged in the sludge slurry conveying pipeline and are used for sterilizing and deodorizing the printing and dyeing sludge;

(2) Ultrasonic vibration: carrying out ultrasonic vibration on the sludge slurry by adopting an ultrasonic vibration device, wherein the ultrasonic vibration parameter is 15kHz-20kHz, and the passing speed of the sludge slurry is 5m/s;

(3) Pretreatment: overflowing the sludge slurry subjected to ultrasonic vibration to a pretreatment device, wherein the pretreatment device is provided with an automatic metering and flotation reagent adding device, the dosage of the flotation reagent is 4kg/t of the solid content, and stirring is carried out for 5 seconds to obtain mixed slurry;

(4) And (3) flotation: overflowing the mixed slurry to a flotation device, wherein a flotation column of the flotation device is used for sucking bubbles generated by a jet device to adhere organic matters to an overflow port flow from a bubble arm to the highest point of a flotation foam layer to obtain organic material slurry; the bottom flow discharged slurry of the flotation column is inorganic slurry;

(5) And (3) thickening: the organic material slurry enters a thickening device for thickening organic materials through a collecting pipeline, wherein the number of the thickening devices is two, and the thickening device is respectively used for thickening organic material slurry and inorganic material slurry; adopting one of the thickening devices to thicken the organic material slurry, wherein the concentration of the thickened organic material slurry reaches 60%; the inorganic material slurry overflows to a thickening device of the inorganic matters, the inorganic material slurry is thickened through the thickening device, and the concentration of the thickened inorganic material slurry reaches 60%;

(6) Dehydrating and filtering: the number of the dehydration filtering devices is two, and the dehydration filtering devices are adopted to respectively dehydrate and filter the thickened organic matter slurry and the inorganic matter slurry to respectively obtain an organic matter filter cake and an inorganic matter filter cake; the thickened organic material slurry is conveyed to a dehydration filtering device through a slurry pump; the thickened inorganic matter slurry is pumped to another dehydration filtering device through a slurry pump; the water content of the organic filter cake after dehydration and filtration is 40 percent, and the water content of the inorganic filter cake is 38 percent.

6. The method of any one of claims 1-4, further comprising the step of subjecting the slurry to microwave treatment prior to the step of ultrasonically vibrating.

7. The method according to any one of claims 1-4, wherein the sludge slurry comprises printing sludge and/or municipal sludge.

8. A sludge organic-inorganic matter separation system, comprising: an ultrasonic vibration device (1), a pretreatment device (2), a flotation device (3), a thickening device (4) and a dehydration filtering device (5); the slurry outlet (16) of the ultrasonic vibration device (1) is connected with the inlet of the pretreatment device (2), the outlet of the pretreatment device (2) is connected with the inlet of the flotation device (3), the outlet of the flotation device (3) is connected with the inlet of the thickening device (4), and the outlet of the thickening device (4) is connected with the inlet of the dehydration filtering device (5); the ultrasonic vibration device (1) comprises a shell (11), and an ultrasonic vibration rod (12), a current stabilizer plate (13) and a ceramic bubble generator set (14) which are positioned in the shell (11); the ultrasonic vibration bars (12) are arranged between the steady flow plates (13) at intervals; the shell (11) is provided with a slurry inlet (15), a slurry outlet (16) and a slurry overflow preventing groove (17), the slurry inlet (15) is connected with a feeding pipeline, the slurry outlet (16) is connected with a discharging pipeline, and the discharging pipeline is provided with a control valve (18).

9. The sludge organic matter and inorganic matter separation system according to claim 8, further comprising a sterilizing and deodorizing means for sterilizing and deodorizing the sludge slurry.

10. A sludge organic matter and inorganic matter separation system according to claim 8 or 9, further comprising microwave means for microwave treatment of the sludge slurry.

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