CN112551860B - Sludge concentration treatment device and method - Google Patents
Sludge concentration treatment device and method Download PDFInfo
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- CN112551860B CN112551860B CN202011533149.8A CN202011533149A CN112551860B CN 112551860 B CN112551860 B CN 112551860B CN 202011533149 A CN202011533149 A CN 202011533149A CN 112551860 B CN112551860 B CN 112551860B
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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
- C02F11/14—Treatment of sludge; Devices therefor by de-watering, drying or thickening with addition of chemical agents
- C02F11/148—Combined use of inorganic and organic substances, being added in the same treatment step
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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
- C02F11/121—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering
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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
- C02F11/13—Treatment of sludge; Devices therefor by de-watering, drying or thickening by heating
Abstract
The invention discloses a sludge concentration treatment device and a method, wherein the concentration treatment device comprises a storage tank, a concentration device and a drying device, an inlet end of a first filtering tank is connected with the storage tank through a pipeline, an outlet end of the first filtering tank is connected with an inlet end of a second filtering tank, a plurality of filtering plates are arranged on the first filtering tank and the second filtering tank, the inlet ends of the first filtering tank and the second filtering tank are arranged below the filtering plates, the outlet ends of the second filtering tank are connected with the inlet end of the upper part of a stirring tank, the stirring tank is internally provided with a stirring device, the outlet end of the stirring tank is connected with the inlet end of the upper part of a sedimentation tank, the upper parts of the first filtering tank, the second filtering tank and the sedimentation tank are all connected with a sewage treatment device, and the outlet end of the sedimentation tank is connected with the drying device. The invention also discloses a method for carrying out sludge concentration treatment by adopting the device. The invention effectively concentrates and dehydrates the sludge, has higher sludge treatment efficiency, and effectively solves the problems of poor reduction effect, difficult sludge dehydration, poor concentration effect and the like in the prior art.
Description
Technical Field
The invention belongs to the technical field of sludge concentration treatment, and particularly relates to a sludge concentration treatment device and method.
Background
In the sewage treatment process, a large amount of sludge is generated, the volume is large, the water content is high and is generally as high as 98-99%, and therefore, the dehydration of the sludge is always a worldwide problem. The sludge is unstable, easy to decay and has foul smell, the main components of the sludge, besides refractory organic matters and nutrient substances such as nitrogen, phosphorus and the like, also have biological pollution sources such as heavy metals, pathogenic bacteria, parasites (eggs) and the like, and the sludge is a semi-solid pollutant which is difficult to treat. Sludge is untreated or improperly treated, which can become a serious environmental hazard and pollute soil, water sources and even food chain belts. The objective of sludge treatment is to reduce, stabilize and detoxify sludge and to achieve recycling by making the sludge be used comprehensively as much as possible, and sludge treatment has become an important issue in current environmental science research.
However, when the dehydration is carried out by a solid-liquid separation method such as mechanical dehydration or vacuum dehydration using a plate-and-frame filter press, a belt dehydrator, a centrifugal dehydrator, or the like, the dehydration rate is slow and the dehydration time is long. The existing concentration treatment method has the problems of high cost, poor effect, low concentration multiple, poor reduction effect and the like, the volume of the concentrated sludge is still huge, the sludge and water are difficult to be concentrated in a layered mode, and the sludge is difficult to dewater.
Disclosure of Invention
Aiming at the defects, the invention provides the sludge concentration treatment device and the sludge concentration treatment method, which are used for effectively concentrating and dehydrating the sludge, have higher sludge treatment efficiency and effectively solve the problems of poor reduction effect, difficult sludge dehydration, poor concentration effect and the like in the prior art.
In order to achieve the purpose, the technical scheme adopted by the invention for solving the technical problems is as follows: the utility model provides a sludge concentration treatment device, which comprises a storage tank, a concentration device and a drying device which are connected in sequence, wherein the concentration device comprises a first filtering tank, a second filtering tank, a stirring tank and a sedimentation tank, the inlet end of the first filtering tank is connected with the storage tank through a pipeline, the outlet end of the first filtering tank is connected with the inlet end of the second filtering tank, a plurality of filtering plates are arranged on the first filtering tank and the second filtering tank, the inlet ends of the first filtering tank and the second filtering tank are arranged below the filtering plates, the outlet end of the second filtering tank is connected with the inlet end of the upper part of the stirring tank, the stirring tank is arranged in the stirring tank, the outlet end of the stirring tank is connected with the inlet end of the upper part of the sedimentation tank, the first filtering tank, the second filtering tank and the upper part of the sedimentation tank are connected with a sewage treatment device, the outlet end of the sedimentation tank is connected with the drying device, the sludge concentration treatment device also comprises a first storage tank, a second storage tank, a third storage tank and a control device, the first storage tank, the second storage tank and the third storage tank are respectively connected with the first filtering pool, the second filtering pool and the injection ports of the stirring pool, and the sewage treatment device, the concentration device and the drying device are all connected with the control device;
the drying device comprises an outer barrel and an inner barrel, wherein the inner barrel is rotatably arranged in the outer barrel, a plurality of stirring paddles are arranged in the inner barrel, a plurality of water filtering holes are formed in the wall of the inner barrel, a plurality of heating devices are arranged on the wall of the outer barrel, the lower part of the outer barrel is connected with a sewage treatment device, and the lower part of the inner barrel is connected with a sludge storage device.
The invention has the beneficial effects that: when sludge concentration and drying are carried out, water-containing sludge is introduced into a first filtering tank from a storage tank, meanwhile, polyacrylate copolymer in the first storage tank is introduced into sludge at the lower end of the first filtering tank, sulfuric acid is added to adjust the pH value of the sludge to be about 3, then, the sludge is introduced into the second filtering tank and is added with a flocculating agent in the second storage tank for treatment, a filtering plate can filter the sludge, the sludge in the first filtering tank and the second filtering tank is isolated below the filtering plate, only moisture can flow to the upper part of the filtering plate under the action of the filtering plate after the sludge is continuously injected, the treated sludge is introduced into a reaction tank, a mixed material consisting of limestone, diatomite and activated carbon in a third storage tank is added to adsorb the sludge, the sludge is then introduced into a settling tank for standing separation, the sludge at the bottom after standing is introduced into a drying device, the inner cylinder rotates to carry out rotary dehydration, and the sludge can also rotate along with the rotation of a stirring paddle, the rotation direction of the inner barrel is opposite to that of the stirring paddle, dehydration is easier, moisture enters the outer barrel through the water filtering holes, meanwhile, the heating device on the wall of the outer barrel is used for heating, drying and dehydrating sludge, finally, the sludge after concentration and dehydration enters the sludge storage device to be stored for later use, and sewage above the filtering plates in the first filtering tank and the second filtering tank, sewage on the upper layer after standing in the sedimentation tank and sewage in the outer barrel are led to the sewage treatment device to be subjected to sewage treatment. The device filters the water-containing sludge twice, adds flocculating agent precipitation, separation and dry dehydration of stewing, can carry out effectual concentration and dehydration with water-containing sludge, and the treatment effeciency is higher, and the decrement effect is better, and the continuous operation of maintenance device can reach the dry purpose of water-containing sludge concentration dehydration, and the concentration effect is better, and the device wholly adopts computer control, and degree of automation is higher, practices thrift manpower and materials, reduces the treatment cost.
Furthermore, the injection ports on the first filter tank and the second filter tank are arranged below the filter plates, and the injection ports on the stirring tank are arranged at the top of the stirring tank.
The beneficial effect of adopting the further scheme is that: the injection opening with flocculating agent etc. sets up in the filter below, guarantees the effective contact of medicament and mud, improves the rate of utilization.
Further, agitating unit includes the puddler, is provided with a plurality of paddles on the puddler, and the puddler is connected with the servo motor transmission.
The beneficial effect of adopting the further scheme is that: during stirring, the stirring rod and the blades are driven to rotate through the servo motor, the mixing degree and the contact degree of the additives and the sludge are improved, the maximum effect is exerted, and the sludge is treated.
Further, the width of the stirring paddle is smaller than the diameter of the inner cylinder.
The beneficial effect of adopting the above further scheme is: so that the rotation of the stirring paddle in the inner cylinder can not interfere with the inner cylinder, and the sludge is dried.
Furthermore, a plurality of overflow weirs are arranged on the upper edge of the inner cylinder.
The method for carrying out sludge concentration treatment by adopting the sludge concentration treatment device comprises the following steps:
(1) introducing the water-containing sludge into a first filtering tank, adding polyacrylate copolymer, mixing and stirring uniformly, then adding sulfuric acid, keeping for 0.5-6h, introducing the sludge at the lower section of the filtering tank into a second filtering tank, adding a flocculating agent, and keeping for 0.5-2h to obtain pretreated sludge;
(2) and (2) introducing the pretreated sludge obtained in the step (1) into a reaction tank, adding the mixed material, stirring and reacting for 1-6h, then introducing into a sedimentation tank, standing for 2-20h, introducing the obtained product after standing into a drying device, rotating an inner cylinder, heating and drying, and finally discharging the dried product out of a sludge storage device to obtain the concentrated sludge.
Further, in the step (1), the addition amount of the polyacrylate copolymer is 0.1-0.8% of the mass of the water-containing sludge; the adding amount of the sulfuric acid is 0.05-1% of the mass of the water-containing sludge; the addition amount of the flocculating agent is 0.08-0.5 percent of the mass of the water-containing sludge.
Further, in the step (1), the polyacrylate copolymer is prepared by the following method: mixing an acrylate monomer, a carboxyl-containing olefin monomer, an initiator and an emulsifier according to a mass ratio of 60-80:2-8:0.1-0.4:4-9, reacting at 60-80 ℃ for 2-10h, adding water to dilute to 5-7 times, and then sequentially coagulating, cleaning, dehydrating and drying by a sodium chloride electrolyte to obtain the polyacrylate copolymer.
Further, the mass ratio of the acrylate monomer, the carboxyl-containing olefin monomer, the initiator and the emulsifier is 70:5:0.3: 6.
Further, the acrylate monomer is ethyl acrylate; the carboxyl-containing olefin monomer is itaconic acid; the initiator is potassium persulfate or sodium bisulfite; the emulsifier is sodium dodecyl benzene sulfonate.
Further, the flocculating agent is anionic or cationic polyacrylamide; the volume concentration of the sulfuric acid is 80-98%.
Further, the mixed material is a mixture formed by mixing diatomite, limestone and active carbon according to the mass ratio of 1-5:2-4: 1.
Further, the mixed material is a mixture formed by mixing diatomite, limestone and active carbon according to the mass ratio of 3:3: 1.
Further, the first filtering pool, the second filtering pool and the stirring pool are heated to 30-80 ℃.
Further, in the steps (1) and (2), sewage generated in the first filtering tank, the second filtering tank, the sedimentation tank and the drying device is introduced into a sewage treatment device for treatment.
In summary, the invention has the following advantages:
1. the sludge concentration treatment device is adopted to effectively concentrate and dewater the sludge, the sludge treatment efficiency is higher, the cost is lower, convenience is provided for subsequent utilization of the sludge, the problems of poor reduction effect, difficulty in sludge dewatering, poor concentration effect and the like in the prior art are effectively solved, the sludge reduction rate can reach over 84%, and the sludge concentration treatment device is convenient to popularize and use.
2. The polyacrylate copolymer and the sulfuric acid are sequentially added into the first filter tank, the copolymer is separated out in a water phase under an acidic condition, water-containing sludge can be softened, sludge concentration is carried out, the volume can be reduced to be below 25%, the reduction effect is obvious, the flexible chains in the copolymer molecular chains have a curling effect, particle substances in the sludge can be driven to agglomerate, the concentration effect is achieved, the copolymer and the sludge are combined to have a certain hydrophobic effect, the concentration and dehydration of the sludge can be accelerated, and the concentration and dehydration effect is good; the addition of the flocculating agent further strengthens the aggregation in the sludge, and the sludge is concentrated and fills the gaps of the sludge, thereby achieving the purposes of concentration and reduction; the mixture is formed by mixing the diatomite, the limestone and the activated carbon, the mixture can adsorb unreacted and complete copolymer, flocculating agent, granular substances in the sludge and the like in the sludge, the diatomite and the activated carbon can also adsorb odor and the like in the sludge, the limestone can also generate bubbles in the stirring process, the contact between the sludge and sewage is reduced, the solid-liquid separation is promoted, and the concentration effect is further improved; the polyacrylate copolymer can be separated out in an acid environment and the concentration and adsorption effects of the mixed materials can be promoted by heating in the filter tank I, the filter tank II and the stirring tank at a proper temperature of 30-80 ℃, particularly solid-liquid separation is promoted, and the concentration effect is enhanced. And finally, physically drying and dehydrating in an inner cylinder of a drying device, and storing the obtained concentrated sludge.
Drawings
FIG. 1 is a schematic view of a sludge thickening apparatus;
FIG. 2 is a schematic view of a drying apparatus;
wherein, 1, a storage pool; 2. a first storage tank; 3. a second storage tank; 4. a third storage tank; 5. a first filtering tank; 6. a second filtering tank; 7. a stirring tank; 8. a sedimentation tank; 9. a stirring device; 10. a filter plate; 11. a sewage treatment device; 12. an outer cylinder; 13. an inner barrel; 14. an overflow weir; 15. a heating device; 16. water filtering holes; 17. a sludge storage device; 18. and (4) a stirring paddle.
Detailed Description
The following detailed description of embodiments of the invention refers to the accompanying drawings.
In one embodiment of the present invention, as shown in fig. 1-2, a sludge concentration treatment apparatus is provided, comprising a storage tank 1, a concentration apparatus and a drying apparatus, which are connected in sequence, wherein the concentration apparatus comprises a first filtering tank 5, a second filtering tank 6, a stirring tank 7 and a sedimentation tank 8, an inlet end of the first filtering tank 5 is connected with the storage tank 1 through a pipeline, an outlet end of the first filtering tank 5 is connected with an inlet end of the second filtering tank 6, a plurality of filtering plates 10 are arranged on the first filtering tank 5 and the second filtering tank 6, inlet ends of the first filtering tank 5 and the second filtering tank 6 are both arranged below the filtering plates 10, an outlet end of the second filtering tank 6 is connected with an inlet end of an upper portion of the stirring tank 7, a stirring apparatus 9 is arranged in the stirring tank 7, an outlet end of the stirring tank 7 is connected with an inlet end of an upper portion of the sedimentation tank 8, upper portions of the first filtering tank 5, the second filtering tank 6 and the sedimentation tank 8 are all connected with a sewage treatment apparatus 11, the outlet end of the sedimentation tank 8 is connected with a drying device, the sludge concentration treatment device also comprises a first storage tank 2, a second storage tank 3, a third storage tank 4 and a control device, the first storage tank 2, the second storage tank 3 and the third storage tank 4 are respectively connected with the first filtering tank 5, the second filtering tank 6 and the injection port of the stirring tank 7, and the sewage treatment device 11, the concentration device and the drying device are all connected with the control device; the drying device comprises an outer barrel 12 and an inner barrel 13, wherein the inner barrel 13 is rotatably arranged in the outer barrel 12, a plurality of stirring paddles 18 are arranged in the inner barrel 13, a plurality of overflow weirs 14 are arranged on the upper edge of the inner barrel 13, a plurality of water filtering holes 16 are arranged on the wall of the inner barrel 13, a plurality of heating devices 15 are arranged on the wall of the outer barrel 12, the lower part of the outer barrel 12 is connected with a sewage treatment device 11, and the lower part of the inner barrel 13 is connected with a sludge storage device 17.
When sludge concentration and drying are carried out, water-containing sludge is introduced into a filtering tank I5 from a storage tank 1, meanwhile, polyacrylate copolymer in a storage tank I2 is introduced into sludge at the lower end of the filtering tank I5, sulfuric acid is added to adjust the pH value of the sludge to about 3, then the sludge is introduced into the lower section of a filtering tank II 6 and is added with flocculant in a storage tank II 3 for treatment, a filtering plate 10 can filter the sludge, the sludge in the filtering tank I5 and the filtering tank II 6 are isolated below the filtering plate 10, the sludge is continuously injected, only moisture can flow to the upper part of the filtering plate 10 under the action of the filtering plate 10, the treated sludge is introduced into a reaction tank, a mixed material consisting of limestone, diatomite and activated carbon in a storage tank III 4 is added to adsorb the sludge, the sludge is then introduced into a sedimentation tank 8 for standing separation, the sludge at the bottom after standing is introduced into a drying device, an inner barrel 13 rotates to carry out rotary dehydration, and the sludge can also rotate along with the rotation of the stirring paddle 18, the rotation direction of the inner barrel 13 is opposite to the rotation direction of the stirring paddle 18, the dehydration is easier, water enters the outer barrel 12 through the water filtering holes 16, meanwhile, the heating device 15 on the wall of the outer barrel 12 heats, dries and dehydrates the sludge, finally, the sludge after the concentration and dehydration enters the sludge storage device 17 to be stored for standby, the sewage above the filter plates 10 in the first filter tank 5 and the second filter tank 6, and the sewage on the upper layer after standing in the sedimentation tank 8 and the sewage in the outer barrel 12 are led to the sewage treatment device 11 to be treated. The device filters the water-containing sludge twice, adds flocculating agent precipitation, separation and dry dehydration of stewing, can carry out effectual concentration and dehydration with water-containing sludge, and the treatment effeciency is higher, and the decrement effect is better, and the continuous operation of maintenance device can reach the dry purpose of water-containing sludge concentration dehydration, and the concentration effect is better, and the device wholly adopts computer control, and degree of automation is higher, practices thrift manpower and materials, reduces the treatment cost.
The injection ports on the first filtering tank 5 and the second filtering tank 6 are arranged below the filtering plate 10, and the injection port on the stirring tank 7 is arranged at the top of the stirring tank 7; the injection opening with flocculating agent etc. sets up in filter 10 below, guarantees the effective contact of medicament and mud, improves the rate of utilization. The stirring device 9 comprises a stirring rod, a plurality of blades are arranged on the stirring rod, and the stirring rod is in transmission connection with a servo motor; during stirring, the stirring rod and the blades are driven to rotate through the servo motor, the mixing degree and the contact degree of the additives and the sludge are improved, the maximum effect is exerted, and the sludge is treated. The width of the stirring paddle 18 is smaller than the diameter of the inner cylinder 13; so that the rotation of the stirring paddle 18 in the inner cylinder 13 does not interfere with the inner cylinder 13, and the sludge drying treatment is performed.
The method for carrying out sludge concentration treatment by adopting the sludge concentration treatment device comprises the following steps:
(1) introducing the water-containing sludge into a first filtering tank, adding polyacrylate copolymer, mixing and stirring uniformly, then adding sulfuric acid, keeping for 2 hours, introducing the sludge at the lower section of the filtering tank into a second filtering tank, adding cationic polyacrylamide, and keeping for 1 hour to obtain pretreated sludge; the addition amount of the polyacrylate copolymer is 0.2 percent of the mass of the water-containing sludge; the adding amount of the sulfuric acid is 0.1 percent of the mass of the water-containing sludge; the adding amount of the cationic polyacrylamide is 0.3 percent of the mass of the water-containing sludge; the polyacrylate copolymer is prepared by the following method: mixing ethyl acrylate, itaconic acid, potassium persulfate and sodium dodecyl benzene sulfonate according to a mass ratio of 65:4:0.2:6, reacting for 5 hours at 70 ℃, adding water to dilute to 7 times, and then sequentially coagulating, cleaning, dehydrating and drying by a sodium chloride electrolyte to obtain a polyacrylate copolymer;
(2) and (2) introducing the pretreated sludge obtained in the step (1) into a reaction tank, adding the mixed material, stirring and reacting for 2 hours, then introducing into a sedimentation tank, standing for 10 hours, introducing the obtained product after standing into a drying device, rotating an inner cylinder, heating and drying, and finally discharging the sludge out of a sludge storage device to obtain the concentrated sludge. Wherein the mixed material is a mixture formed by mixing diatomite, limestone and active carbon according to the mass ratio of 2:3: 1. In the steps (1) and (2), the sewage generated in the first filtering tank, the second filtering tank, the sedimentation tank and the drying device is introduced into a sewage treatment device for treatment. The sludge reduction rate after the treatment is 84.5 percent.
In another embodiment, the sludge thickening process is carried out using the following steps: (1) introducing the water-containing sludge into a first filtering tank, adding polyacrylate copolymer, mixing and stirring uniformly, then adding sulfuric acid, keeping for 3 hours, introducing the sludge at the lower section of the filtering tank into a second filtering tank, adding cationic polyacrylamide, and keeping for 1 hour to obtain pretreated sludge; the addition amount of the polyacrylate copolymer is 0.5 percent of the mass of the water-containing sludge; the adding amount of the sulfuric acid is 0.5 percent of the mass of the water-containing sludge; the adding amount of the cationic polyacrylamide is 0.2 percent of the mass of the water-containing sludge; the polyacrylate copolymer is prepared by the following method: mixing ethyl acrylate, itaconic acid, potassium persulfate and sodium dodecyl benzene sulfonate according to a mass ratio of 70:5:0.3:6, reacting for 6 hours at 70 ℃, adding water to dilute to 6 times, and then sequentially coagulating, cleaning, dehydrating and drying by a sodium chloride electrolyte to obtain a polyacrylate copolymer;
(2) and (2) introducing the pretreated sludge obtained in the step (1) into a reaction tank, adding the mixed material, stirring and reacting for 4 hours, then introducing into a sedimentation tank, standing for 2-20 hours, introducing the obtained product after standing into a drying device, rotating an inner cylinder, heating and drying, and finally discharging the sludge out of a sludge storage device to obtain the concentrated sludge. Wherein the mixed material is a mixture formed by mixing kieselguhr, limestone and active carbon according to the mass ratio of 3:3: 1. In the steps (1) and (2), sewage generated in the first filtering tank, the second filtering tank, the sedimentation tank and the drying device is introduced into a sewage treatment device for treatment. The sludge reduction rate after the treatment is 85.2 percent.
The sludge concentration device and the sludge concentration method provided by the invention can effectively concentrate and dewater the sludge, have higher sludge treatment efficiency and lower cost, provide convenience for subsequent utilization of the sludge, effectively solve the problems of poor reduction effect, difficult sludge dewatering, poor concentration effect and the like in the prior art, have the sludge reduction rate of over 84 percent, have better effect and are convenient to popularize and use.
While the embodiments of the invention have been described in detail in connection with the drawings, the invention should not be construed as limited to the scope of the patent. Various modifications and changes may be made by those skilled in the art without inventive step within the scope of the appended claims.
Claims (8)
1. A sludge concentration treatment device is characterized by comprising a storage tank (1), a concentration device and a drying device which are connected in sequence, wherein the concentration device comprises a first filter tank (5), a second filter tank (6), a stirring tank (7) and a sedimentation tank (8), the inlet end of the first filter tank (5) is connected with the storage tank (1) through a pipeline, the outlet end of the first filter tank (5) is connected with the inlet end of the second filter tank (6), a plurality of filter plates (10) are arranged on the first filter tank (5) and the second filter tank (6), the inlet ends of the first filter tank (5) and the second filter tank (6) are arranged below the filter plates (10), the outlet end of the second filter tank (6) is connected with the inlet end of the upper part of the stirring tank (7), a stirring device (9) is arranged in the stirring tank (7), the outlet end of the stirring tank (7) is connected with the inlet end of the upper part of the sedimentation tank (8), the upper parts of the first filtering tank (5), the second filtering tank (6) and the sedimentation tank (8) are connected with a sewage treatment device (11), the outlet end of the sedimentation tank (8) is connected with the drying device, the sludge concentration treatment device further comprises a first storage tank (2), a second storage tank (3), a third storage tank (4) and a control device, the first storage tank (2), the second storage tank (3) and the third storage tank (4) are respectively connected with the first filtering tank (5), the second filtering tank (6) and the injection port of the stirring tank (7), and the sewage treatment device (11), the concentration device and the drying device are all connected with the control device;
the drying device comprises an outer cylinder (12) and an inner cylinder (13), the inner cylinder (13) is rotatably arranged in the outer cylinder (12), a plurality of stirring paddles (18) are arranged in the inner cylinder (13), a plurality of water filtering holes (16) are formed in the wall of the inner cylinder (13), a plurality of heating devices (15) are arranged on the wall of the outer cylinder (12), the lower part of the outer cylinder (12) is connected with the sewage treatment device (11), and the lower part of the inner cylinder (13) is connected with a sludge storage device (17);
the method for performing sludge concentration treatment by using the sludge concentration treatment device comprises the following steps:
(1) introducing the water-containing sludge into a first filtering tank, adding polyacrylate copolymer, mixing and stirring uniformly, then adding sulfuric acid, keeping for 0.5-6h, introducing the sludge at the lower section of the filtering tank into a second filtering tank, adding a flocculating agent, and keeping for 0.5-2h to obtain pretreated sludge;
(2) introducing the pretreated sludge obtained in the step (1) into a reaction tank, adding a mixed material, stirring and reacting for 1-6h, then introducing into a sedimentation tank, standing for 2-20h, introducing the obtained product after standing into a drying device, rotating an inner cylinder, heating and drying, and finally discharging the product out of a sludge storage device to obtain concentrated sludge; the mixed material is a mixture formed by mixing diatomite, limestone and active carbon according to the mass ratio of 1-5:2-4: 1.
2. The sludge concentration treatment apparatus according to claim 1, wherein the injection ports on the first filtering tank (5) and the second filtering tank (6) are below the filtering plates (10), and the injection port on the stirring tank (7) is on the top of the stirring tank (7).
3. The sludge concentration treatment device according to claim 1, wherein the stirring device (9) comprises a stirring rod, a plurality of blades are arranged on the stirring rod, and the stirring rod is in transmission connection with a servo motor.
4. The sludge thickening apparatus according to claim 1, wherein a plurality of weirs (14) are provided at an upper edge of the inner cylinder (13).
5. The sludge concentration treatment apparatus according to claim 1, wherein in the step (1), the amount of the polyacrylate copolymer added is 0.1-0.8% of the mass of the water-containing sludge; the adding amount of the sulfuric acid is 0.05-1% of the mass of the water-containing sludge; the addition amount of the flocculant is 0.08-0.5% of the mass of the water-containing sludge.
6. The sludge concentration treatment apparatus according to claim 1 or 5, wherein in the step (1), the polyacrylate copolymer is prepared by: mixing an acrylate monomer, a carboxyl-containing olefin monomer, an initiator and an emulsifier according to a mass ratio of 60-80:2-8:0.1-0.4:4-9, reacting at 60-80 ℃ for 2-10h, adding water to dilute to 5-7 times, and then sequentially coagulating, cleaning, dehydrating and drying by a sodium chloride electrolyte to obtain the polyacrylate copolymer.
7. The sludge concentration treatment apparatus according to claim 1, wherein the flocculant is an anionic or cationic polyacrylamide; the volume concentration of the sulfuric acid is 80-98%.
8. The sludge concentration treatment device according to claim 1, wherein in the steps (1) and (2), the sewage generated in the first filtering tank, the second filtering tank, the sedimentation tank and the drying device is introduced into a sewage treatment device for treatment.
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| KR20020016604A (en) * | 2001-08-27 | 2002-03-04 | 손을택 | Process for high density waste water treatment |
| CN101081887B (en) * | 2007-07-05 | 2010-05-19 | 成都波尼门高科技有限公司 | Preparation method of polyacrylate copolymer elastomer |
| CN207520654U (en) * | 2017-10-31 | 2018-06-22 | 泸州市聚源电力设备有限公司 | Mudpan |
| CN209669035U (en) * | 2018-10-26 | 2019-11-22 | 潍坊市康成环保工程有限公司 | A kind of sludge concentration desiccation integral machine |
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| CN210595756U (en) * | 2019-06-12 | 2020-05-22 | 西安工程大学 | Municipal administration mud resourceful treatment device |
| CN211056951U (en) * | 2019-11-08 | 2020-07-21 | 温华环境科技（北京）有限公司 | Sludge concentration device |
| CN111675480A (en) * | 2020-05-18 | 2020-09-18 | 江苏森茂能源发展有限公司 | High-efficiency sludge dewatering technology |
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2020
- 2020-12-22 CN CN202011533149.8A patent/CN112551860B/en active Active
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