CN213112671U - Sludge and wastewater treatment device - Google Patents
Sludge and wastewater treatment device Download PDFInfo
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- CN213112671U CN213112671U CN202020247668.7U CN202020247668U CN213112671U CN 213112671 U CN213112671 U CN 213112671U CN 202020247668 U CN202020247668 U CN 202020247668U CN 213112671 U CN213112671 U CN 213112671U
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Abstract
The utility model discloses a sludge and wastewater treatment device. This mud and effluent treatment plant includes: the ozone catalytic oxidation treatment device comprises a shell, wherein a partition board is arranged in the shell, the partition board defines a feeding space and an ozone catalytic oxidation treatment space in the shell, a first through hole is formed in the top of the partition board, a second through hole is formed in the bottom of the partition board, a feeding hole is formed in one side, close to the feeding space, of the shell, a discharging hole is formed in the upper portion of one side, close to the ozone catalytic oxidation treatment space, of the shell, and an ozone inlet and a flow guide hole; the bottom surface of the modularized catalytic bed layer is an inclined plane, and an ozone catalyst is arranged in the modularized catalytic bed layer. Therefore, the device is easy to construct, can prevent the blockage of the catalytic bed layer, and has better sludge reduction and wastewater treatment effects.
Description
Technical Field
The utility model relates to a sewage treatment field specifically, relates to a mud and effluent treatment plant.
Background
With the continuous expansion of population scale and the continuous development of social economy, the discharge amount of urban domestic sewage and industrial sewage is increased, the sewage treatment load is continuously increased, and the requirement on the sewage treatment level is higher and higher. The activated sludge process is a biochemical sewage treatment process which is most widely used, however, the process can generate a large amount of excess sludge, and the generated sludge can pollute underground water, soil and the like if the sludge cannot be treated properly. Therefore, proper treatment and disposal of sludge is an urgent problem to be solved in sewage treatment. Wherein, the sludge reduction is a source control step for realizing the sludge resource and harmless treatment. Among many sludge reduction technologies, hydroxyl radicals (. OH) generated by catalytic oxidation of ozone have a stronger killing power and a lower selectivity than ozone, and are capable of effectively destroying microbial cells in dissolved sludge and oxidizing dissolved organic substances into carbon dioxide (CO)2) And water (H)2O), dissolving and reducing the sludge. In addition, the sludge reduction technology does not produce secondary pollution, can reduce the odor of the sludge, and has good environmental benefit.
However, the current sludge and wastewater treatment plants still need to be improved.
SUMMERY OF THE UTILITY MODEL
The present invention aims at solving at least one of the technical problems in the related art to a certain extent.
The inventor finds that the existing ozone catalytic oxidation reactor for sludge reduction has fewer types and a single structure, and generally has the problems of easy blockage of a catalytic bed layer, poor sludge treatment effect and the like. Therefore, if a new sludge treatment device (which can not only treat sludge but also treat wastewater) can be provided, when the sludge treatment device is used for sludge treatment, the catalytic bed layer is not easy to block, the ozone catalytic oxidation treatment efficiency is high, the sludge reduction treatment and wastewater treatment effects are good, the structure is flexible, the applicability is wide, and the device can be coupled with various wastewater treatment devices, and the like, so that the problems can be solved to a great extent.
In view of this, in one aspect of the present invention, the present invention provides a sludge and wastewater treatment apparatus. This mud and effluent treatment plant includes: the ozone catalytic oxidation treatment device comprises a shell, wherein a partition plate is arranged in the shell, a feeding space and an ozone catalytic oxidation treatment space are defined in the shell by the partition plate, a first through hole is formed in the top of the partition plate, a second through hole is formed in the bottom of the partition plate, the shell is provided with a feeding hole and a discharging hole, an ozone inlet and a flow guide hole are formed in one side, close to the ozone catalytic oxidation treatment space, of the shell, and the flow guide hole is formed below the ozone inlet; the ozone catalytic oxidation treatment device comprises a modularized catalytic bed layer, wherein the modularized catalytic bed layer is arranged in the middle of an ozone catalytic oxidation treatment space, the bottom surface of the modularized catalytic bed layer is an inclined plane, and an ozone catalyst is arranged in the modularized catalytic bed layer. Therefore, in the sludge and wastewater treatment device, the bottom surface of the modularized catalytic bed layer is an inclined plane, so that the contact area between the sludge and the modularized catalytic bed layer can be increased, the sludge accumulation is facilitated, the sludge treatment efficiency is improved, and excessive sludge can be discharged through the flow guide port, so that the blockage of the catalytic bed layer is effectively prevented; and can supply ozone to ozone catalytic oxidation treatment space through the ozone air inlet, can be better with mud and ozone, perhaps waste water and ozone mix and enter the modularization catalytic bed, carry out ozone catalytic oxidation decomposition reaction, ozone catalytic oxidation is efficient, and sludge treatment and waste water treatment are effectual.
According to the utility model discloses an embodiment, the cross section shape of modularization catalyst bed on the perpendicular to first direction is right trapezoid, right trapezoid's upper base with go to the bottom along with first direction and the equal vertically second direction parallel arrangement of upper and lower direction, right trapezoid's upper base is close to the casing, right trapezoid's the lower base is close to the baffle, the length of upper base is less than the length of going to the bottom, right trapezoid's hypotenuse corresponds the modularization catalyst bed the bottom surface. Therefore, the modularized catalytic bed layer with the structure is beneficial to the accumulation of sludge, can better prevent the blockage of the catalytic bed layer and further improves the sludge treatment effect.
According to an embodiment of the utility model, the modularization catalytic bed includes at least one of fixed bed, fluidized bed, expanded bed. From this, the design of this modularization catalytic bed is nimble, and the type of this modularization catalytic bed etc. can with ozone catalyst's kind phase-match to richened the structure etc. of this mud and effluent treatment plant, the range of application is more extensive, and can further improve ozone catalytic oxidation efficiency, further improve sludge treatment effect.
According to the utility model discloses an embodiment, the modularization catalysis bed with the casing the modularization catalysis bed with for dismantling the connection between the baffle. From this, this modularization catalytic bed can freely be changed, and this mud and effluent treatment plant can be built in a flexible way fast, and the dismouting and the maintenance of being convenient for have further improved this mud and effluent treatment plant's performance.
According to the utility model discloses an embodiment, this mud and effluent treatment plant further includes: and the aeration pipeline is arranged below the modular catalytic bed layer and is connected with the ozone inlet. From this, set up the aeration pipe way through the bottom at the modularization catalytic bed, can be better with mud and ozone, perhaps waste water and ozone mix to the shell makes the mixture get into the modularization catalytic bed through the upflow effect of aeration in, carries out ozone catalytic oxidation decomposition reaction, and ozone catalytic oxidation is efficient, and sludge treatment and waste water treatment are effectual.
According to the utility model discloses an embodiment, mud and effluent treatment plant further includes the guiding gutter, the guiding gutter sets up in the ozone catalytic oxidation handles the space, the guiding gutter sets up and is being close to one side of casing, the guiding gutter with the water conservancy diversion mouth at least one of discharge gate links to each other. Therefore, the deposited sludge can be washed through aeration of the aeration pipeline and can be discharged from the discharge hole or the diversion port through the diversion trench, so that the blockage of the catalytic bed layer is effectively prevented, and the service performance of the sludge and wastewater treatment device is further improved.
According to an embodiment of the present invention, the ozone catalyst includes at least one of a metal-nonmetal composite type dual carrier catalyst, a carbon-based catalyst, an alumina-based catalyst, a silica-based catalyst, an ore-based catalyst, a noble metal, a transition metal, and an oxide-based catalyst thereof. Therefore, the ozone catalytic oxidation efficiency of the ozone catalyst is high, and the sludge treatment and wastewater treatment effects are further improved.
According to an embodiment of the present invention, the support of the metal-nonmetal composite dual-support catalyst includes a composite support of a carbon-based material and alumina. Therefore, the composite carrier has good surface activity of the carbon-based material and good mechanical property of the aluminum oxide material, and the stability and the catalytic performance of the metal-nonmetal compound double-carrier catalyst are further improved.
According to the utility model discloses an embodiment, metal-nonmetal compound type double carrier catalyst includes first catalytic component and second catalytic component, first catalytic component includes metallic element, second catalytic component includes non-metallic element. Therefore, the catalyst formed by combining the metal elements and the nonmetal elements has good catalytic performance, further improves the catalytic oxidation efficiency of ozone, and improves the sludge treatment and wastewater treatment efficiency.
According to an embodiment of the invention, the first catalytic component comprises iron; the second catalytic component includes nitrogen. Therefore, the metal-nonmetal compound double-carrier catalyst formed by doping iron and nitrogen has excellent catalytic performance, the catalytic oxidation efficiency of ozone is further improved, and the sludge treatment and wastewater treatment efficiency is improved.
Drawings
FIG. 1 is a schematic view showing the structure of a sludge and wastewater treatment apparatus according to an embodiment of the present invention;
FIG. 2 is a schematic view showing the structure of a sludge and wastewater treatment apparatus according to another embodiment of the present invention;
FIG. 3 is a schematic view showing the structure of a sludge and wastewater treatment apparatus according to another embodiment of the present invention;
FIG. 4 shows a process flow diagram of a method of sludge or wastewater treatment according to an embodiment of the present invention;
FIG. 5 is a graph showing COD removal rates of sludge and wastewater treatment apparatuses according to examples and comparative examples of the present invention;
and
FIG. 6 is a graph showing the oxalic acid removal rate of sludge and wastewater treatment apparatuses according to examples and comparative examples of the present invention.
Reference numerals:
1000: a sludge and wastewater treatment device; 100: a housing; 110: a feed inlet; 120: a discharge port; 130: an ozone inlet; 140: a flow guide port; 150: a diversion trench; 160: a flow guide clapboard; 170: a support; 200: a partition plate; 210: a first through hole; 220: a second through hole; 300: a feed space; 400: an ozone catalytic oxidation treatment space; 500: modularization of the catalytic bed layer; 510: a bottom surface; 600: an ozone catalyst; 700: an aeration pipeline.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.
In one aspect of the present invention, the present invention provides a sludge and wastewater treatment apparatus. According to the embodiment of the present invention, referring to fig. 1, the sludge and wastewater treatment apparatus 1000 includes: a housing 100 and a modular catalyst bed 500, wherein the housing 100 has a partition plate 200 therein, the partition plate 200 defines a feeding space 300 and an ozone catalytic oxidation treatment space 400 in the housing 100, the top portion (refer to the "top" direction shown in fig. 1) of the partition plate 200 has a first through hole 210, the bottom portion (refer to the "bottom" direction shown in fig. 1) of the partition plate 200 has a second through hole 220, the housing 100 has a feeding port 110 and a discharging port 120 thereon, for example, the feeding port 110 is disposed at a side close to the feeding space 300, the upper portion (refer to the "upper" direction shown in fig. 1) of a side of the housing 100 close to the ozone catalytic oxidation treatment space 400 is disposed with a discharging port 120, the housing 100 is close to the ozone catalytic oxidation treatment space 400, for example, the ozone inlet 130 and a diversion port 140 are disposed at the lower portion (refer to the "lower" direction shown in fig. 1) of a side of the ozone catalytic, and the diversion opening 140 is arranged below the ozone inlet 130; the modular catalyst bed 500 is arranged in the middle of the ozone catalytic oxidation treatment space 300, the bottom surface 510 of the modular catalyst bed 500 is an inclined surface, and the ozone catalyst 600 is arranged in the modular catalyst bed 500. Therefore, the sludge and wastewater treatment device 1000 can prevent the blockage of the modular catalytic bed layer 500, and has better sludge reduction treatment and wastewater treatment effects.
For convenience of understanding, the following first illustrates the principle that the sludge and wastewater treatment apparatus 1000 according to the embodiment of the present invention can achieve the above-mentioned advantageous effects:
as mentioned above, the existing ozone catalytic oxidation reactor for sludge reduction has few types and single structure, and generally has the problems of easy blockage of a catalytic bed layer, poor sludge treatment effect and the like. In the sludge and wastewater treatment apparatus 1000 according to the embodiment of the present invention, on one hand, the bottom surface 510 of the modular catalyst bed 500 is an inclined surface, which can increase the contact area between the sludge and the modular catalyst bed 500, thus being beneficial to the accumulation of the sludge and improving the sludge treatment efficiency; in addition, by arranging the diversion port 140 in the shell 100, the excess sludge can be discharged through the diversion port 140, thereby effectively preventing the blockage of the modular catalytic bed layer 500; on the other hand, ozone can be supplied to the ozone catalytic oxidation treatment space 400 through the ozone inlet 130, sludge and ozone or wastewater and ozone can be mixed well and enter the modular catalytic bed 500, and the ozone catalyst 600 arranged in the modular catalytic bed 500 is utilized to perform ozone catalytic oxidation decomposition reaction, so that the ozone catalytic oxidation efficiency is high, and the sludge treatment and wastewater treatment effects are good; moreover, the sludge and wastewater treatment device 1000 has low treatment cost and wide applicability, the sludge and wastewater treatment device 1000 can be used for sludge reduction treatment, can be coupled with other processes for wastewater pretreatment, and improves wastewater biodegradability, so that the wastewater treatment efficiency of biochemical processes is improved, or the sludge and wastewater treatment device can be used for advanced treatment of biochemical effluent, further removes organic matters which are difficult to degrade in water, and is beneficial to standard-reaching discharge or regeneration and reuse of wastewater.
In the following, each unit of the sludge and wastewater treatment apparatus 1000, and the working principle and operation method thereof are explained in detail according to the embodiment of the present invention:
according to the embodiment of the present invention, the size of the housing 100 is not particularly limited, and those skilled in the art can flexibly select the size of the sludge or wastewater treatment site, the quality of the treated sludge or wastewater, the treatment amount, and the like. According to the embodiment of the present invention, the partition board 200 is disposed in the casing 100, the partition board 200 defines the feeding space 300 and the catalytic ozonation treatment space 400 in the casing 100, the top of the partition board 200 has the first through hole 210, and the bottom of the partition board 200 has the second through hole 220, that is, the top and the bottom of the feeding space 300 and the catalytic ozonation treatment space 400 are communicated. Specifically, the first through hole 210 and the second through hole 220 may be provided with a stop valve, so that the first through hole 210 and the second through hole 220 may be opened or closed as needed. Specifically, the side of the casing 100 close to the feeding space 300 is provided with the feeding hole 110, and more specifically, the feeding hole 110 may be arranged at the lower part of the side of the casing 100 close to the feeding space 300, so that the sludge or wastewater enters the ozone catalytic oxidation treatment space 400 through the second through hole 220 for treatment after entering the feeding space 300 through the feeding hole 110; moreover, the sludge or wastewater treated by the modular catalytic bed 500 can enter the feeding space 300 again through the first through hole 210 and enter the ozone catalytic oxidation treatment space 400 again for circular treatment, so that the sludge and wastewater treatment effect can be further improved.
According to the utility model discloses an embodiment can adopt the mode of preaeration, supply with ozone in ozone catalytic oxidation treatment space 400 through ozone exposure port 130 earlier promptly, mix ozone and waste water and form the ozone water, then let in the ozone water after will mixing in modularization catalytic bed 500, carry out ozone catalytic oxidation and handle. According to an embodiment of the present invention, referring to fig. 2, the sludge and wastewater treatment apparatus 1000 may further include an aeration pipeline 700, the aeration pipeline 700 is disposed below the modular catalyst bed 500, and the aeration pipeline 700 is connected to the ozone inlet 130. Therefore, after the sludge or the wastewater enters the catalytic ozonation treatment space 400, under the aeration action of the aeration pipeline 700, the mixture of ozone and sludge, ozone and wastewater can enter the modular catalytic bed 500 above in an up-flow manner, and under the action of the ozone catalyst 600, the catalytic ozonation treatment is efficiently performed.
According to the utility model discloses an embodiment, bottom surface 510 of modularization catalyst bed 500 is the inclined plane, and is more specific, refer to fig. 1, modularization catalyst bed 500 can be right trapezoid at the cross-sectional shape of perpendicular to first direction (perpendicular to paper direction promptly), right trapezoid's upper base and lower bottom along with first direction and the equal vertically second direction parallel arrangement of upper and lower direction, right trapezoid's upper base is close to casing 100, right trapezoid's lower bottom is close to baffle 200, and, the length of upper base is less than the length of going to the bottom, right trapezoid's hypotenuse corresponds modularization catalyst bed 500's bottom surface. Therefore, the modular catalytic bed layer 500 with the structure is beneficial to the accumulation of sludge, the blockage of the modular catalytic bed layer 500 can be well prevented, and the sludge treatment effect is further improved. Specifically, a triangular anti-clogging area can be formed between the bottom surface of the modular catalytic bed layer 500, the shell 100 and the partition board 200, that is, after sludge or wastewater enters the ozone catalytic oxidation treatment space 400, the sludge or wastewater can be mixed with ozone in the triangular anti-clogging area, under the aeration effect of the aeration pipeline 700, the mixture of ozone, sludge, ozone and wastewater can enter the modular catalytic bed layer 500 above in an up-flow manner, and under the effect of the ozone catalyst 600, the ozone catalytic oxidation treatment can be efficiently performed.
According to an embodiment of the present invention, the specific type of the modular catalyst bed 500 is not particularly limited, and specifically, the modular catalyst bed 500 may include at least one of a fixed bed, a fluidized bed, and an expanded bed. From this, this modularization catalytic bed 500's design is nimble, and this modularization catalytic bed 500's type etc. can with ozone catalyst 600's kind phase-match to richened the structure etc. of this mud and effluent treatment plant 1000, the range of application is more extensive, and can further improve ozone catalytic oxidation efficiency, further improve sludge treatment effect.
According to the embodiment of the present invention, the connection between the modular catalyst bed 500 and the shell 100, the modular catalyst bed 500 and the partition 200 can be detachable. From this, this modularization catalytic bed 500 can freely be changed, and this mud and effluent treatment plant 1000 can be built in a flexible way fast, and the dismouting and the maintenance of being convenient for have further improved this mud and effluent treatment plant 1000's performance.
According to the embodiment of the present invention, referring to fig. 2 and 3, the sludge and wastewater treatment apparatus 1000 may further include a guiding gutter 150, the guiding gutter 150 is disposed in the ozone catalytic oxidation treatment space 400, the guiding gutter 150 is disposed on one side of the casing 100, and the guiding gutter 150 is connected to at least one of the guiding opening 140 and the discharge opening 120. It should be noted that, referring to fig. 2, the casing 100 may further include a baffle 160, the baffle 160 is disposed in the catalytic ozonation treatment space 400, the baffle 160 and the casing 100 define a baffle groove 150, and through holes (not shown) are formed between the upper end of the baffle 160 and the casing 100 and between the lower end of the baffle 160 and the casing 100. That is, the top of the diversion trench 150 may be communicated with the discharge port 120, so that the sludge or wastewater in the diversion trench 150 is discharged through the discharge port 120, and the diversion baffle 160 does not affect the discharge of the water or sludge treated by the modular catalyst bed 500 through the discharge port 120; and, the bottom of the diversion trench 150 may also be communicated with the diversion port 140, so that the sludge or wastewater in the diversion trench 150 is discharged through the diversion port 140. Specifically, the through hole between the upper end of the baffle plate 160 and the housing 100 and the through hole between the lower end of the baffle plate 160 and the housing 100 may be opened or closed to perform different water treatment processes according to different requirements, for example, a valve or a baffle may be disposed at the through hole to control the opening or closing of the through hole. For example, referring to fig. 3, a bracket 170 may be disposed at the bottom of the baffle 160, and the bracket 170 may be opened or closed, so as to control the opening and closing between the bottom of the baffle 160 and the housing 100.
Specifically, when a normal water treatment process is performed, the bracket 170 may be closed (refer to the structure shown in fig. 3), at this time, sludge or wastewater enters a triangular area which may be formed by the bottom surface of the modular catalytic bed 500, between the housing 100 and the partition board 200, and under the aeration effect of the aeration pipeline 700, ozone and wastewater are mixed and enter the modular catalytic bed 500 for the catalytic ozonation treatment, and purified water and the like generated after the treatment may be discharged through the discharge port 120; specifically, when the amount of sludge accumulated in the triangular region formed by the bottom surface of the modular catalyst bed 500 and the space between the housing 100 and the partition 200 is large, which may easily cause blockage of the modular catalyst bed, the bracket 170 (refer to the structure shown in fig. 2) may be opened, and the excess sludge may be discharged from the diversion port 140 through the through hole between the diversion partition 160 and the bottom of the housing 100 or discharged from the discharge port 120 along the diversion trench 150, and the aeration pipeline 700 may be used to flush the bottom surface of the modular catalyst bed 500 and the region between the modular catalyst bed 500 and the diversion partition 160, thereby effectively preventing blockage of the modular catalyst bed 500 and further improving the usability of the sludge and wastewater treatment apparatus 1000. According to the utility model discloses an embodiment has ozone catalyst 600 in modularization catalytic bed 500, and this ozone catalyst 600 can be the stronger hydroxyl free radical of oxidizing nature with ozone catalysis, and then can oxidize microorganism, organic matter etc. in mud or the waste water, improves mud and waste water treatment effect. According to an embodiment of the present invention, a specific kind of the ozone catalyst 600 is not particularly limited, for example, the ozone catalyst 600 may include at least one of a metal-nonmetal complex type dual carrier catalyst, a carbon-based catalyst, and an alumina-based catalyst. Therefore, the ozone catalytic oxidation efficiency of the ozone catalyst 600 is high, and the sludge treatment and wastewater treatment effects are further improved.
Specifically, the support of the metal-nonmetal composite type dual carrier catalyst may include a composite support of a carbon-based material and alumina. Therefore, the composite carrier has good surface activity of the carbon-based material and good mechanical property of the aluminum oxide material, and the stability and the catalytic performance of the metal-nonmetal compound double-carrier catalyst are further improved. Specifically, the metal-nonmetal complex dual-carrier catalyst may include a first catalytic component and a second catalytic component, the first catalytic component may include a metal element, and the second catalytic component may include a nonmetal element. Therefore, the catalyst formed by combining the metal elements and the nonmetal elements has good catalytic performance, further improves the catalytic oxidation efficiency of ozone, and improves the sludge treatment and wastewater treatment efficiency. According to a specific embodiment of the present invention, the first catalytic component may include iron and the second catalytic component may include nitrogen. Through intensive research and a large number of experiments, the inventor discovers that the metal-nonmetal compound double-carrier catalyst formed by doping iron and nitrogen has excellent catalytic performance, can further improve the catalytic oxidation efficiency of ozone, and improves the sludge treatment and wastewater treatment efficiency.
For example, specifically, an iron-supported carbon-based dual-carrier catalyst may be used. The inventor finds that compared with other common catalytic metals such as Cu, Mn, Ce and the like, Fe in the Fe element-supported carbon-based dual-carrier catalyst can catalyze graphitization, so that more carbon grows on the carrier core in the form of graphite carbon. In addition, iron is used as a transition metal and can also be used as an ozone catalytic core to catalyze the ozone reaction process. Therefore, the iron-supported carbon-based dual-carrier catalyst has better catalytic performance. The inventor finds that the Ni element also has ozone catalytic performance and the performance of catalyzing the graphitization of the carbon element on the carrier, but the performance of the Fe element is more excellent: when other conditions are the same, compared with the Ni-loaded carbon-based dual-carrier catalyst, the Fe-loaded carbon-based dual-carrier catalyst has the degradation rate of oxalic acid for 30min which is 5% higher than that of the Ni-loaded carbon-based dual-carrier catalyst.
According to the embodiment of the present invention, the metal-nonmetal composite dual-carrier catalyst can be prepared by using a metal source and a nonmetal source through one-step in-situ doping. Specifically, an activated carbon precursor, a metal organic salt and a nonmetal organic salt can be dissolved in deionized water according to a proper proportion to form a precursor mixed solution; then soaking cleaned and dried gamma-alumina into the precursor mixed solution, inducing various precursors to the inside and the surface of a gamma-alumina pore channel through vacuum, roasting the dried precursors in a high-temperature atmosphere, graphitizing the activated carbon precursor under the catalysis of metal salt, and simultaneously realizing one-step in-situ doping of metal and nonmetal to form the metal-nonmetal compound dual-carrier catalyst. According to the metal-nonmetal compound type double-carrier catalyst prepared by the method, metal and nonmetal are effectively dispersed in a carbon framework as catalytic components, and the synergistic effect of the metal and the nonmetal enables the catalytic effect of the double-carrier catalyst to be remarkably enhanced, the ozone catalytic performance to be greatly improved, and meanwhile, the advantages of good mechanical performance, multiple catalytic sites and the like of the double-carrier catalyst are not changed, so that the ozone catalytic oxidation efficiency can be further improved, and the sludge treatment and wastewater treatment efficiency of the sludge and wastewater treatment device is improved.
For ease of understanding, the method of sludge or wastewater treatment using the aforementioned apparatus will be briefly described below. According to an embodiment of the present invention, referring to fig. 4, the method includes:
s100: feeding sludge or wastewater from a feed inlet into a feed space
In this step, the sludge or wastewater is supplied from the feed port into the feed space and supplied from the second through-hole in the bottom of the partition plate into the ozone catalytic oxidation treatment space. According to the utility model discloses an embodiment, as before, the feed inlet can be located the lower part of casing, consequently, mud or waste water from the feed inlet get into after the feeding space, can directly get into ozone catalytic oxidation treatment space through the second through-hole of baffle bottom, carry out ozone catalytic oxidation and handle.
S200: ozone supply to catalytic ozonation space using ozone inlet
In this step, ozone is supplied to the catalytic ozonation treatment space through the ozone inlet, and specifically, as described above, the catalytic ozonation treatment space may be aerated through the ozone inlet and the aeration pipeline, so that the sludge or the wastewater is sufficiently mixed with ozone and enters the modular catalytic bed, and microorganisms and organic matters in the sludge or the wastewater react under the action of ozone and the ozone catalyst in the modular catalytic bed, thereby achieving the purposes of sludge reduction and wastewater purification.
According to the utility model discloses an embodiment, as before, the bottom surface of modularization catalysis bed can be the inclined plane, and is more specific, and the cross sectional shape of modularization catalysis bed in the first direction of perpendicular to can be right trapezoid, and the modularization catalysis bed that has this structure is favorable to piling up of mud to can prevent the jam of modularization catalysis bed betterly, further improve sludge treatment effect. Specifically, the specific type of the modular catalyst bed is not particularly limited, and specifically, the modular catalyst bed may include at least one of a fixed bed, a fluidized bed, and an expanded bed. Specifically, the modular catalyst bed and the shell, and the modular catalyst bed and the partition plate can be detachably connected. From this, this modularization catalytic bed can freely be changed, and this mud and effluent treatment plant can be built in a flexible way fast, and the dismouting and the maintenance of being convenient for have further improved this mud and effluent treatment plant's performance.
According to an embodiment of the present invention, the specific kind of the ozone catalyst is not particularly limited, for example, the ozone catalyst may include at least one of a metal-nonmetal complex type dual carrier catalyst, a carbon-based catalyst, and an alumina-based catalyst. Specifically, the support of the metal-nonmetal composite type dual carrier catalyst may include a composite support of a carbon-based material and alumina. Therefore, the composite carrier has good surface activity of the carbon-based material and good mechanical property of the aluminum oxide material, and the stability and the catalytic performance of the metal-nonmetal compound double-carrier catalyst are further improved. Specifically, the metal-nonmetal complex dual-carrier catalyst may include a first catalytic component and a second catalytic component, the first catalytic component may include a metal element, and the second catalytic component may include a nonmetal element. Therefore, the catalyst formed by combining the metal elements and the nonmetal elements has good catalytic performance, further improves the catalytic oxidation efficiency of ozone, and improves the sludge treatment and wastewater treatment efficiency. According to a specific embodiment of the present invention, the first catalytic component may include iron and the second catalytic component may include nitrogen. Through intensive research and a large number of experiments, the inventor discovers that the metal-nonmetal compound double-carrier catalyst formed by doping iron and nitrogen has excellent catalytic performance, can further improve the catalytic oxidation efficiency of ozone, and improves the sludge treatment and wastewater treatment efficiency.
S300: the sludge or wastewater after the catalytic oxidation treatment of the ozone is discharged from a discharge hole
In the step, the sludge or wastewater after the catalytic oxidation treatment by ozone is discharged from a discharge hole. Specifically, as mentioned above, the discharge port may be disposed at the upper portion of the housing, microorganisms and organic matters in the sludge or wastewater react under the action of ozone and the ozone catalyst in the modular catalyst bed, and a product after the reaction may be discharged from the discharge port.
According to the utility model discloses an embodiment, after mud or waste water got into ozone catalytic oxidation treatment space by the second through-hole of baffle bottom, this method further includes: and the sludge or the wastewater which does not enter the modular catalytic bed layer is discharged from the diversion port. Specifically, the method for discharging the sludge or wastewater which does not enter the modular catalytic bed layer from the diversion port may be the same as that described above, and will not be described herein again. Therefore, the method can better prevent sludge deposition and catalytic bed layer blockage, and further improve the service performance of the sludge and wastewater treatment device.
According to the utility model discloses an embodiment, after microorganism and organic matter in mud or waste water take place the reaction under the effect of ozone and the ozone catalyst in the modularization catalytic bed, this method further includes: the sludge or wastewater after the ozone catalytic oxidation treatment enters the feeding space from the first through hole at the top of the partition board and enters the ozone catalytic oxidation treatment space again through the second through hole at the bottom of the partition board. Therefore, sludge or wastewater which is not completely treated can enter the feeding space through the first through hole and enter the ozone catalytic oxidation treatment space again for ozone catalytic oxidation treatment, and the sludge treatment effect and the water purification effect are further improved.
In conclusion, the method can better prevent sludge deposition and catalytic bed layer blockage, has high ozone catalytic oxidation efficiency, good sludge treatment and wastewater treatment effects, low cost and wide application range.
The solution of the present invention will be explained with reference to the following examples. It will be appreciated by those skilled in the art that the following examples are illustrative of the invention only and should not be taken as limiting the scope of the invention. The examples, where specific techniques or conditions are not indicated, are to be construed according to the techniques or conditions described in the literature in the art or according to the product specifications.
Example 1
Preparing a metal-nonmetal compound type dual-carrier catalyst, taking Fe-N co-doping as an example:
(1) weighing a certain amount of gamma-alumina carrier;
(2) weighing a certain amount of glucose and ammonium citrate powder at room temperature, adding a certain amount of deionized water, fully stirring and dissolving to prepare a precursor solution;
(3) vacuum-soaking the weighed gamma-alumina with a precursor solution (wherein the mass ratio of the gamma-alumina to the glucose to the ammonium citrate is 10: 1: 0.7), standing at room temperature for 6h, and placing the solid part in an oven at 60 ℃ for 6 h;
(4) and (3) placing the dried solid powder in a tubular furnace protected by argon or nitrogen, heating to 600 ℃ at the heating rate of 5 ℃/min, roasting at constant temperature for 4h, and then cooling to room temperature at the same speed of 5 ℃/min to obtain the Fe-N co-doped double-carrier catalyst.
Example 2
Construct according to the utility model discloses sludge and effluent treatment plant of embodiment.
Referring to fig. 2, the sludge and wastewater treatment apparatus 1000 includes: the device comprises a shell 100, a modular catalytic bed layer 500 and an aeration pipeline 700, wherein a partition plate 200 is arranged in the shell 100, the partition plate 200 defines a feeding space 300 and an ozone catalytic oxidation treatment space 400 in the shell 100, a first through hole 210 is arranged at the top of the partition plate 200, a second through hole 220 is arranged at the bottom of the partition plate 200, a feeding hole 110 is arranged at one side of the shell 100 close to the feeding space 300, a discharging hole 120 is arranged at the upper part of one side of the shell 100 close to the ozone catalytic oxidation treatment space 400, an ozone air inlet 130 and a diversion port 140 are arranged at the lower part of one side of the shell 100 close to the ozone catalytic oxidation treatment space 400, the diversion port 140 is arranged below the ozone air inlet 130, a diversion trench 150 is further arranged in the ozone catalytic oxidation treatment space 400, and the diversion; the modularized catalytic bed layer 500 is arranged in the middle of the ozone catalytic oxidation treatment space 300, the bottom surface 510 of the modularized catalytic bed layer 500 is an inclined surface, and an ozone catalyst 600 is arranged in the modularized catalytic bed layer 500; the aeration pipeline 700 is arranged below the modular catalytic bed layer 500, and the aeration pipeline 700 is connected with the ozone inlet 130. Wherein the modular catalyst bed 500 is an ozone fluidized bed, and the ozone catalyst 600 is the Fe-N co-doped dual-carrier catalyst (Fe-N-CAF/O) prepared in example 13)。
Example 3
The sludge and wastewater treatment apparatus constructed in this example has the same structure as that of example 2, except that the ozone catalyst used in this example is a Fe catalyst alone (Fe-CAF/O)3) And the other preparation method of the separate Fe catalyst was the same as example 1 except that only Fe was doped.
Example 4
The sludge and wastewater treatment apparatus constructed in this example has the same structure as that of example 2, except that the ozone catalyst used in this example is a single N catalyst (N-CAF/O)3) And the single N catalyzesThe other preparation of the agent was the same as in example 1, except that only N was used for doping.
Comparative example 1
The sludge and wastewater treatment apparatus constructed in this comparative example had the same structure as that of example 2, except that no ozone catalyst was used and oxidation was performed with ozone alone.
And (3) performance testing:
and (3) sludge reduction treatment test:
sludge reduction treatment was performed using the sludge and wastewater treatment apparatus constructed in example 2. Referring to fig. 1, sludge enters a feeding space 200 from a feeding hole 110, enters an ozone catalytic oxidation treatment space 400 through a second through hole 220 at the bottom of a partition plate 200, an aeration pipeline 700 is communicated with an ozone inlet 130 and an ozone generator, the sludge and ozone are fully contacted in a triangular anti-blocking area (namely, an area defined between a modular catalytic bed layer 500, a shell 100 and the partition plate 200), the sludge enters a modular catalytic bed layer 500 filled with a metal-nonmetal composite double-carrier catalyst in an up-flow manner, and the ozone generates hydroxyl radicals (· OH) with strong oxidizing property under the action of the catalyst, so that microbial cells in the sludge are decomposed and dissolved organic matters are mineralized, and sludge reduction is realized. The treated sludge flows out of the discharge 120 at the upper part of the ozone catalytic oxidation treatment space 400. The excess sludge flows into the diversion trench 150 along the hypotenuse of the triangular anti-clogging region and is discharged through the diversion port 140, preventing the sludge from depositing at the bottom of the ozone catalytic oxidation treatment space and preventing the aeration pipeline 700 or the modular catalytic bed 500 from clogging.
Through the utility model discloses a mud and effluent treatment plant, in ozone catalytic oxidation fluidized bed, mud can decrement 10% -50%, compares in the ozone catalytic oxidation reactor that is used for mud decrement of conventional, and during decrement the same amount mud, the ozone of consumption can be saved 50% -80%, and can prevent to block up. The biochemical property of the treated wastewater is also greatly improved, the wastewater is used as a carbon source to flow back to the biochemical pool, no secondary pollution is generated, and good economic and environmental benefits are achieved.
Wastewater purification treatment test:
wastewater purification treatment was performed using the sludge and wastewater treatment apparatus constructed in example 2. Referring to fig. 1, wastewater enters a feeding space 200 from a feeding hole 110, enters an ozone catalytic oxidation treatment space 400 through a second through hole 220 at the bottom of a partition plate 200, an aeration pipeline 700 is communicated with an ozone inlet 130 and an ozone generator, sludge and ozone are fully contacted in a triangular anti-blocking area (namely, an area defined between a modular catalytic bed layer 500, a shell 100 and the partition plate 200), and enter the modular catalytic bed layer 500 filled with a metal-nonmetal complex type double-carrier catalyst in an up-flow manner, and the ozone generates hydroxyl radicals (· OH) with strong oxidizing property under the action of the catalyst, so that microbial cells in the wastewater are decomposed and dissolved organic matters are mineralized, and wastewater purification is realized. The treated purified water flows out of the discharge 120 at the upper part of the ozone catalytic oxidation treatment space 400.
The sludge and wastewater treatment device can be coupled with other wastewater treatment processes, can be used as a pretreatment means to improve the biochemical property of wastewater, thereby improving the treatment efficiency of the biochemical process, and can also be used as an advanced treatment means to further treat refractory organic matters in biochemical effluent, thereby being beneficial to standard-reaching discharge or recycling of wastewater.
Calculating the sludge reduction treatment cost:
the volume of the reactor is 3m3The hydraulic retention time is 0.5h, and the sludge inlet amount is 144m3The concentration of suspended solids in the mixture was 5g/L, resulting in a dry matter of 720 kg/d. If the sludge is reduced by 10 percent, the dry matter is reduced by 72kg/d, and the corresponding wet sludge amount is 360kg/d, and the treatment cost per ton is 500 yuan, so that 180 yuan can be saved.
Testing the catalytic performance of the ozone catalyst:
wastewater treatment was performed using the sludge and wastewater treatment apparatuses of examples 2 to 4 and comparative example 1, and the Fe-N co-doped double carrier catalyst (Fe-N-CAF/O) of example 2 was used3) Fe catalyst alone (Fe-CAF/O) of example 33) N catalyst alone (N-CAF/O) from example 43) And ozone alone (O) in comparative example 13) The effect of removing COD in the wastewater is tested and compared:
firstly, the actual wastewater of coal gas production is used as inlet water for testing, the test result refers to fig. 5, and fig. 5 shows the removal efficiency of COD after 2.5 min. The inlet water is the actual wastewater of coal gas production, the dosage of the catalyst is 4g/L, the oxygen flow is 1L/min, and the ozone concentration is 10 mg/L. As shown in FIG. 5, the Fe-N co-doped dual-carrier catalyst can greatly improve the catalytic degradation performance of ozone, and Fe-N-CAF/O is obtained after 2.5min3The system can degrade 31 percent of COD in the wastewater and is single O38.15 times of the system. As can be seen from the test results of FIG. 5, the Fe-N co-doped dual carrier catalyst (Fe-N-CAF/O) prepared in example 13) The catalytic oxidation effect of the ozone is better.
Next, the test was performed using oxalic acid solution as the inlet water, and the test results refer to fig. 6, where fig. 6 shows the oxalic acid removal efficiency after 20 seconds. The catalyst dosage is 4g/L, the oxygen flow is 1L/min, and the ozone concentration is 10 mg/L. As can be seen from FIG. 6, the Fe or N doped dual-carrier catalyst can greatly improve the catalytic degradation performance of ozone on oxalic acid, and after 20s, Fe-N-CAF/O3The system can degrade 46 percent of oxalic acid and is O alone323 times of the system. As can be seen from the test results of FIG. 6, the Fe-N co-doped dual carrier catalyst (Fe-N-CAF/O) prepared in example 13) The catalytic ozonation effect of (2) is good, and the catalytic ozonation treatment efficiency is high by combining the catalyst with the sludge and wastewater treatment device in the embodiment 2, and the catalytic ozonation treatment device has good sludge reduction and wastewater treatment effects.
The embodiments of the present invention have been described in detail, but the present invention is not limited to the details of the above embodiments, and the technical idea of the present invention is within the scope of the present invention, which can be right to the technical solution of the present invention, and these simple modifications all belong to the protection scope of the present invention. It should be noted that the various features described in the above embodiments may be combined in any suitable manner without departing from the scope of the invention.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "top", "bottom", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus should not be construed as limiting the present invention.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Although embodiments of the present invention have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art without departing from the scope of the present invention.
Claims (8)
1. A sludge and wastewater treatment device is characterized by comprising:
the ozone catalytic oxidation treatment device comprises a shell, wherein a partition plate is arranged in the shell, a feeding space and an ozone catalytic oxidation treatment space are defined in the shell by the partition plate, a first through hole is formed in the top of the partition plate, a second through hole is formed in the bottom of the partition plate, the shell is provided with a feeding hole and a discharging hole, an ozone inlet and a flow guide hole are formed in one side, close to the ozone catalytic oxidation treatment space, of the shell, and the flow guide hole is formed below the ozone inlet;
the ozone catalytic oxidation treatment device comprises a modularized catalytic bed layer, wherein the modularized catalytic bed layer is arranged in the middle of an ozone catalytic oxidation treatment space, the bottom surface of the modularized catalytic bed layer is an inclined plane, and an ozone catalyst is arranged in the modularized catalytic bed layer.
2. The sludge and wastewater treatment apparatus as claimed in claim 1, wherein the cross-section of the modular catalyst bed perpendicular to the first direction is in the shape of a right trapezoid, the upper and lower bottoms of the right trapezoid are arranged in parallel along a second direction perpendicular to both the first direction and the up-down direction, the upper bottom of the right trapezoid is close to the housing, the lower bottom of the right trapezoid is close to the partition, the length of the upper bottom is smaller than that of the lower bottom, and the oblique side of the right trapezoid corresponds to the bottom surface of the modular catalyst bed.
3. The sludge and wastewater treatment plant of claim 1 wherein the modular catalytic bed comprises at least one of a fixed bed, a fluidized bed, and an expanded bed.
4. The sludge and wastewater treatment apparatus of claim 1 wherein the modular catalyst bed and the housing, the modular catalyst bed and the partition are removably attached.
5. The sludge and wastewater treatment apparatus as set forth in claim 1, further comprising:
and the aeration pipeline is arranged below the modular catalytic bed layer and is connected with the ozone inlet.
6. The sludge and wastewater treatment apparatus as set forth in claim 1, further comprising a diversion trench disposed in the ozone catalytic oxidation treatment space, the diversion trench being disposed at a side close to the housing, the diversion trench being connected to at least one of the diversion opening and the discharge opening.
7. The sludge and wastewater treatment apparatus as claimed in claim 1, wherein the ozone catalyst comprises a metal-nonmetal composite type dual carrier catalyst, a carbon-based catalyst, an alumina-based catalyst, a silica-based catalyst, an ore-based catalyst, a noble metal, a transition metal or a transition metal oxide-based catalyst.
8. The sludge and wastewater treatment apparatus as claimed in claim 7, wherein the carrier of the metal-nonmetal composite dual carrier catalyst comprises a composite carrier of carbon-based material or alumina.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111302478A (en) * | 2020-03-03 | 2020-06-19 | 清华大学 | Sludge and wastewater treatment device and sludge or wastewater treatment method |
| CN113908777A (en) * | 2021-10-29 | 2022-01-11 | 清华大学 | Multi-stage circulation ozone catalytic oxidation reaction device and catalytic oxidation method |
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2020
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111302478A (en) * | 2020-03-03 | 2020-06-19 | 清华大学 | Sludge and wastewater treatment device and sludge or wastewater treatment method |
| CN111302478B (en) * | 2020-03-03 | 2024-03-12 | 清华大学 | Sludge and wastewater treatment device and sludge or wastewater treatment method |
| CN113908777A (en) * | 2021-10-29 | 2022-01-11 | 清华大学 | Multi-stage circulation ozone catalytic oxidation reaction device and catalytic oxidation method |
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