CN210134036U - Sludge biological modification recycling treatment system - Google Patents
Sludge biological modification recycling treatment system Download PDFInfo
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- CN210134036U CN210134036U CN201920525782.9U CN201920525782U CN210134036U CN 210134036 U CN210134036 U CN 210134036U CN 201920525782 U CN201920525782 U CN 201920525782U CN 210134036 U CN210134036 U CN 210134036U
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Abstract
The utility model provides a sludge biological modification recycling treatment system, which comprises a first biological modifier, a second biological modifier, a filter pressing device, a crushing and granulating device, a carbonizing device and a sewage treatment device; the sludge with a novel structure is obtained by combining the internal structural characteristics of the sludge after biological modification in the process of pyrolysis and carbonization in a special mode of adding fine agricultural wastes and controlling corresponding preparation conditions, and the biological modified sludge has the advantages of large pores, high porosity, regular pores, light specific gravity and the like.
Description
Technical Field
The utility model relates to a fertile technical field of preparation of mud preparation charcoal base especially relates to a biological modified resourceful treatment system of mud.
Background
The excess sludge is solid, semi-solid and liquid waste generated by sewage treatment by an activated sludge method, and is a necessary product of a sewage treatment plant, generally speaking, the volume of the excess sludge accounts for about 0.5-2% of the volume of the treated sewage, the water content of the sludge after dehydration in the prior art still reaches about 80%, so that huge capital investment and operation cost are required for properly treating the huge sludge, and the operation cost of sludge treatment accounts for about 25-50% of the total operation cost of the sewage treatment plant, therefore, the existing established sludge treatment facilities in China run normally, and most of the sludge is not subjected to any treatment and is transported outside, discarded at will and is simply filled or used in agricultural land.
However, the water content of the sludge of the municipal sewage plant is high, the difficulty of transportation and centralized treatment is high, more than 60% of heavy metals in the sewage can be transferred to the sludge, the heavy metals such As Cr, Ni, Cu, Zn, Pb, As, Cd, and the like, which are enriched in the sludge, can pollute soil and surface water when being improperly treated, and in addition, the sludge contains a large amount of organic matters, pathogenic microorganisms, and the like which are difficult to degrade, and the sludge is easy to decay and deteriorate after being stacked for a long time and generate foul gas, so how to safely and effectively treat the sludge, the problem of sludge enclosure is solved, and the sludge enclosure becomes a hotspot problem of environmental protection and sustainable.
Patent document CN201710186154.8 discloses a method for preparing a slow-release phosphate fertilizer from sludge-based biochar, which comprises subjecting conditioned sludge to hydrothermal carbonization reaction to obtain biomass charcoal, and mixing with a phosphorus solution to obtain a slow-release phosphate fertilizer.
However, the above patents still have the following problems:
1. the biomass charcoal formed by hydrothermal carbonization has a common structure and general performance parameters, and cannot be used as an additive of a high-quality carbon-based fertilizer;
2. in the conditioning process, the heavy metal in the sludge is not completely removed, and the subsequently manufactured biomass charcoal still contains heavy metal elements.
SUMMERY OF THE UTILITY MODEL
To above problem, the utility model provides a biological modified resourceful treatment system of mud combines biological modified back mud inner structure characteristic through the special mode that adds agricultural discarded object in small, broken bits in a small, and the corresponding preparation condition of control obtains the mud base living beings of a novel structure, it has the hole big, the porosity is high, hole rule and specific weight advantage such as light, mix this mud base living beings and inorganic fertilizer into the biological charcoal base fertilizer of high economic value again, traditional mud preparation charcoal base fertilizer has been solved, the inferior technical problem of charcoal structural performance.
The technical solution of the utility model is as follows:
a sludge biological modification recycling treatment system comprises:
the first biological modifier is used for carrying out primary modification treatment on fresh sludge in the first biological modifier;
the second biological modifier is communicated with the discharge hole of the first biological modifier, receives the sludge treated by the first biological modifier and carries out secondary modification treatment;
the filter pressing device is communicated with a second discharge hole of the second biological modifier and is used for filter pressing the sludge output by the second biological modifier to form filter residue and filtrate;
the crushing and granulating device is communicated with a slag outlet of the filter pressing device, receives filter residues pressed and filtered by the filter pressing device, and performs crushing and granulating treatment on the filter residues;
the carbonization device is communicated with a third discharge port of the crushing and granulating device, a feeding and spraying mechanism is arranged on the carbonization device, and the carbonization device receives the sludge particles formed by the crushing and granulating device and heats the sludge particles; and
and the sewage treatment device is communicated with a liquid outlet in the filter pressing device and adsorbs heavy metal elements in the filtrate.
Wherein the reaction temperature in the first biological modifier is 20-35 ℃, and the reaction environment is aerobic environment; the reaction temperature of the second biological modifier is 10-35 ℃, and the reaction environment is aerobic.
The filter pressing device is a diaphragm box type filter press, the feeding time is 2 hours, the high-pressure water pressing is 1 hour, the feeding pressure is 0.8MPa, the diaphragm pressing force is 2.0MPa, and the water content of filter residue after dehydration is 45-50%.
The average grain diameter of the sludge particles formed by the crushing and granulating device is 1-3 mm.
The carbonization device is a rotary carbonization furnace, the carbonization temperature is 550-600 ℃, and the carbonization time is 0.5-2h, so that 2200m of the carbonization device with the specific surface area of 2000-2The porosity in unit volume is 70-85%, and the average pore diameter is 2-5 μm.
As an improvement, fresh sludge is pumped in by a spiral conveying pipeline arranged on the first biological modifier.
As an improvement, the sludge subjected to primary modification in the first biological modifier is conveyed into the second biological modifier through a conveying pipeline for communicating the first biological modifier with the second biological modifier to be subjected to secondary modification treatment.
As an improvement, filter residues pressed and filtered by the filter pressing device enter the crushing and granulating device through a second spiral conveying pipeline connected with the filter pressing device and the crushing and granulating device.
As an improvement, a heating jacket is arranged outside the crushing and granulating device, and the heating jacket dries filter residues in the crushing and granulating device.
As an improvement, the heating jacket is communicated with a smoke port on the carbonization device and receives hot smoke discharged by the carbonization device.
As an improvement, the feeding and spraying mechanism is arranged on the carbonization device and is close to a position communicated with a third discharge hole of the crushing and granulating device.
As an improvement, the sewage treatment device is provided with ion exchange resin which adsorbs heavy metal elements in the filtrate.
The beneficial effects of the utility model reside in that:
(1) the utility model combines the internal structure characteristics of the sludge after biological modification in the process of pyrolysis and carbonization by adding fine agricultural wastes and controlling the corresponding preparation conditions to obtain the sludge-based biomass with a novel structure, which has the advantages of large pores, high porosity, regular pores, light specific gravity and the like, and then mixes the sludge-based biomass and inorganic fertilizer into the biochar-based fertilizer with high economic value;
(2) the utility model discloses utilize the mud base living beings charcoal that the biological modified preparation charcoal method of above-mentioned mud prepared to mix, form the carbon base fertilizer after stirring with inorganic fertilizer, utilize the excellent water-holding capacity and the adsorptivity of the mud base living beings charcoal of preparing, when adsorbing the slowly-releasing to inorganic fertilizer, improve the water-holding capacity of soil, inherent heavy metal element in the passivation soil improves the growing environment of crop;
(3) the utility model discloses a set up first biological modifier and second biological modifier, utilize biological modification to replace the primary thallus in mud, make the volume of the thallus in the mud enlarge 5-10 times, rethread pyrolysis carbonization process, the thallus carbomorphism makes the inside of mud form the hole that the aperture is relatively great, the appearance is complete and regular, improve each item performance parameter of mud base living beings charcoal after the pyrolysis carbonization, make the mud base living beings charcoal of preparing be superior to the living beings charcoal that the existing method prepared;
(4) the feeding and spraying mechanism is arranged at the feeding port of the carbonization device to spray agricultural wastes, so that the coking condition of sludge on the wall of the carbonization furnace is avoided; on the other hand, when the sludge enters the carbonization furnace, the sludge has certain water content and viscosity, so that the agricultural wastes and the sludge are fully bonded, and the sludge-based biomass charcoal with a novel structure, which is formed by combining high-purity biomass charcoal formed by pyrolysis and carbonization of the agricultural wastes and charcoal formed by pyrolysis and carbonization of the sludge, is prepared.
Overall, the utility model has the advantages of design benefit, the fertile economic value of mud charcoal base of preparing is high, is particularly useful for mud preparation charcoal base fertile preparation facility technical field.
Drawings
The invention will be further explained with reference to the drawings:
FIG. 1 is a schematic view of the overall structure of a system for preparing carbon-based fertilizer by biological modification of sludge according to the present invention;
FIG. 2 is a diagram showing the spraying effect of the finely-divided agricultural waste according to the present invention;
FIG. 3 is an electron scanning electron microscope observation image of the sludge-based biomass charcoal of the present invention;
fig. 4 is a simulation diagram of the sludge-based biomass charcoal of the present invention.
Detailed Description
The technical solution in the embodiment of the present invention is clearly and completely described below with reference to the accompanying drawings.
Example (b):
as shown in fig. 1, a sludge biological modification and resource treatment system comprises:
the device comprises a first biological modifier 1, wherein a first spiral conveying pipeline 11 which is communicated with a sludge pool 10 and is used for spirally inputting fresh sludge is arranged on the first biological modifier 1;
a second biological modifier 2, wherein the second biological modifier 2 is communicated with the discharge port 12 of the first biological modifier 1 through a conveying pipeline 21 and receives the sludge treated by the first biological modifier 1;
the filter pressing device 3 is communicated with the discharge hole 22 of the second biological modifier 2, and is used for filter pressing the sludge output by the second biological modifier 2 to form filter residue and filtrate;
the crushing and granulating device 4 is communicated with the slag outlet 31 of the filter pressing device 3 through a second spiral conveying pipeline 41, and receives filter residues pressed and filtered by the filter pressing device 3;
the carbonizing device 5 is communicated with the discharge port 42 of the crushing and granulating device 4, is provided with a feeding and spraying mechanism 51, and receives sludge particles formed by the crushing and granulating device 4; and
and the sewage treatment device 6 is communicated with a liquid outlet 32 in the filter pressing device 3 and adsorbs heavy metal elements in the filtrate.
Wherein the reaction temperature in the first biological modifier 1 is 20-35 ℃, and the reaction environment is aerobic environment; the reaction temperature of the second biological modifier 2 is 10-35 ℃, and the reaction environment is aerobic.
Adding a first composite flora sludge inoculum into a first biological modifier 1 filled with fresh sludge according to 15-20% of the volume proportion of the fresh sludge, adding a microorganism modified nutrient according to 5-7% of the mass of dry matter of the sludge, and reacting for 1-2.5h at 20-35 ℃ under aerobic conditions; then a second composite flora sludge inoculum is inoculated into a second biological modifier 2 according to 30-40% of the sludge volume proportion, a microorganism growth promoter is added according to the proportion of 2-4% of the sludge dry matter mass, the reaction is carried out for 7-15h under the aerobic condition at 10-35 ℃, the average volume size of the first composite flora and the average volume size of the second composite flora are respectively increased by 5-10 times than that of the protobacteria in the sludge, wherein the first composite flora is composed of bacillus subtilis, pseudomonas aeruginosa, white rot fungi and alteromonas, and the second composite flora is composed of thiobacillus ferrooxidans and thiobacillus thiooxidans;
in the reaction process, in the reaction stage of the first compound flora, the first compound flora provides a suitable production environment for the second compound flora while fully degrading soluble micromolecular organic matters and persistent organic pollutants in the sludge, replaces the raw thalli in the sludge, and increases the average volume size of the thalli in the sludge from 0.5-1 mu m3 to 3-5 mu m3 in the reaction stage; simultaneously, surface active substances capable of promoting sludge dehydration and the growth of the sludge inoculum of the second compound flora are generated;
in the second reaction stage, the average volume of thalli in the sludge is reduced from 3-5 microns 3 to 2-3 microns 3 while the water in the sludge is released through biodegradation, biological wall breaking, biological surface active substance modification, biological oxidation and biological acidification of the sludge by the sludge inoculum of the second composite flora.
It is further explained that, the utility model discloses an add the agricultural discarded object in small, broken bits in the fresh sludge, utilize the agricultural discarded object to destroy fresh sludge's viscidity, make first compound fungus crowd and the compound fungus crowd of second carry out biological substitution effect in can be more quick entering into mud, replace original somatic cell, shorten reaction time, improve the growth rate of first compound fungus crowd and the compound fungus crowd of second, it is modified to realize mud at the process reaction front end, promote process rear end pyrolysis carbonization effect, optimize product property ability.
It is further illustrated that, in the biological modification stage of the present invention, the biological metabolism of the first complex flora and the second complex flora is uniformly dispersed in each part of the sludge, and in the subsequent sludge pyrolysis carbonization process, the uniformly dispersed pores formed in the sludge-based biomass charcoal by the first complex flora and the second complex flora are more uniform.
In a preferred embodiment, the filter pressing device 3 is a diaphragm box filter press, the feeding time is 2h, the high-pressure water pressing is 1h, the feeding pressure is 0.8MPa, the diaphragm pressing force is 2.0MPa, and the water content of the dehydrated filter residue is 45-50%.
In a preferred embodiment, a heating jacket 43 is provided outside the crushing and granulating device 4, and the heating jacket 43 dries the filter residue in the crushing and granulating device 4.
Further, the heating jacket 43 is communicated with a flue gas port 53 on the carbonization device 5, and receives high-temperature flue gas discharged from the carbonization device 5.
Furthermore, the average grain diameter of the sludge particles formed by the crushing and granulating device 4 is 1-3 mm.
It is noted that the heating jacket 43 is dried at 120-200 ℃ for 10-30mim, and the water content of the dried sludge particles is less than 30%.
Further explaining, the utility model discloses a drying at the granulation in-process, making the sludge drying, the appearance of fixed mud, later in the pyrolysis carbonization in-process, the temperature reaches 300 + 450 ℃, the carbonization of the inside first complex fungus crowd of mud and the carbonization of second complex fungus crowd to form regular, even hole, and the internal structure of mud base living beings charcoal is stable.
As shown in FIG. 4, as a preferred embodiment, the carbonization device 5 is a rotary carbonization furnace, the carbonization temperature is 550--2200m2The porosity in unit volume is 70-85%, and the average pore diameter is 2-5 μm.
As shown in fig. 2, further, a feeding spraying mechanism 51 is arranged at the feeding port of the carbonization device 5 to spray agricultural wastes, so that the sludge is prevented from coking on the furnace wall of the carbonization furnace; on the other hand, when the sludge enters the carbonization furnace, the sludge has certain water content and viscosity, so that the agricultural wastes are fully bonded with the sludge.
Here, it is emphatically explained that, because the pyrolysis carbonization temperature of agricultural waste is 300-.
As shown in fig. 3 and 4, it is further illustrated that the addition of the agricultural wastes enables the preparation of a sludge-based biomass charcoal with a novel structure in which a high-purity biomass charcoal formed by pyrolysis and carbonization of the agricultural wastes is combined with a charcoal formed by pyrolysis and carbonization of sludge, which has the advantages of light specific gravity, large pores, high porosity, and the like.
In addition, the utility model discloses in the preparation process of mud base living beings charcoal to do not add any polluted environment's chemical agent, what add is thallus and organic matter, and do not produce any harmful material to environmental pollution in mud.
In a preferred embodiment, the wastewater treatment device 6 is provided with an ion exchange resin 61, and the ion exchange resin 61 adsorbs heavy metal elements in the filtrate.
The ion exchange resin 61 may absorb one or a combination of a plurality of resins selected from Pb2+ ion, Hg2+ ion, Cu2+ ion, Zn2+ ion, Cr6+ ion, Ni2+ ion, and Cd2+ ion.
Wherein the chelating resin can effectively and selectively remove Pb2+, and the adsorption capacity for Pb2+ reaches 1.08-1.45mmol g < -1 >.
The macroporous structural styrene copolymer resin ImacTMR resin has thiol functional groups and acid sulfuric acid functional groups, and has strong affinity to Hg2 +.
One of Amberlite eIRC-718 chelating resin, Dowex50x8 strong acid cation resin, chelating resin DoweexXFS-4195 or chelating resin DoweexXFS-4196 is implanted into an adsorption reactor to remove Cu2+ from wastewater with pH of 1.5-7.0.
Ion exchange resin LewatitOC-1026, implanted in an adsorption reactor, can remove Zn2+ from wastewater having a ph of 1.5-7.0.
One or more of Amberlite IR-120Na type strong acid cation exchange resin, Amberlite IRA-420 strong base anion exchange resin, Amberlite IR-67RF weak base anion exchange resin, LewatitMP-500A macroporous strong base anion exchange resin and domestic D370 weak base anion exchange resin or 201 x 7 strong base anion exchange resin, wherein the selective adsorption capacity of the resin to Cr6+ reaches 1.08-2.35 mmol-g-1 resin in wastewater with the pH of 2.5-7.0.
One or more of WofatitCA-20 macroporous carboxyl Na type cation exchange resin, Chelex-100 chelating imino ion exchange resin or DoweexXFS-4195 resin is implanted into an adsorption reactor, and Ni2+ can be removed from wastewater with pH of 1.5-7.0.
One or two cation exchange resins of Dowex 50W-X4 or Purolites-950 are implanted into an adsorption reactor, and Cd2+ can be removed from wastewater with the pH value of 1.5-7.0.
And all the resins for absorbing metal ions can be regenerated by taking 0.5-1.5mol/L nitric acid solution as regeneration liquid to absorb saturated resins.
The working process is as follows:
about 10 tons of concentrated sludge containing 5% of solids is taken, and the organic matter content is measured to be 55%, and the pH value is 7.6. Adding the modified sludge into a first biological modifier 1 for modification, adding a first composite flora sludge inoculum into a biological modification reactor filled with fresh sludge according to 15-20% of the volume proportion of the fresh sludge, adding a microbial modified nutrient according to the proportion of 5-7% of the dry matter mass of the sludge, and reacting for 1-2.5 hours at the temperature of 20-35 ℃ under aerobic conditions; then, a second composite flora sludge inoculum is inoculated into a biological second biological modifier 2 according to 30-40% of the volume proportion of the sludge, a microorganism growth promoter is added according to the proportion of 2-4% of the mass of dry matter of the sludge, and the mixture reacts for 7-15 hours at the temperature of 10-35 ℃ under the aerobic condition; the sludge after biological modification is pressed for 1 hour by high pressure water through a filter pressing device 3 to form filter residue and filtrate, wherein the feeding time of the filter pressing device 3 is 2 hours, the feeding pressure is 0.8MPa, the diaphragm pressing force is 2.0MPa, the water content of a dewatered sludge cake is 47 percent, the filter residue obtained after filter pressing and dewatering is input into a crushing and granulating device 4 through a second spiral conveying pipeline 41, sludge particles with the average diameter of 1-3mm are obtained after physical crushing and granulation, in the granulating process, the sludge is synchronously dried, the drying temperature is 120-, under the conditions that the carbonization furnace is in an oxygen deficiency or anaerobic state, the carbonization temperature is 575-600 ℃, and the carbonization time is 0.5-1.25h, the sludge biochar is obtained; then, the sludge biochar can be mixed with an inorganic fertilizer to form a carbon-based fertilizer, and can also be used as a raw material of an adsorbing material, meanwhile, the filtrate in the filter pressing device 3 is input into the sewage treatment device 6, heavy metal ions in the filtrate are adsorbed by the ion exchange resin 61, and then the filtrate is discharged.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention should be covered by the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (8)
1. A sludge biological modification resourceful treatment system is characterized by comprising:
a first biological modifier (1), wherein the fresh sludge in the first biological modifier (1) is subjected to primary modification treatment;
the second biological modifier (2), the second biological modifier (2) is communicated with the discharge hole (12) of the first biological modifier (1), and receives the sludge treated by the first biological modifier (1) for secondary modification treatment;
the filter pressing device (3) is communicated with a second discharge hole (22) of the second biological modifier (2), and is used for filter pressing the sludge output by the second biological modifier (2) to form filter residue and filtrate;
the crushing and granulating device (4), the crushing and granulating device (4) is communicated with a slag outlet (31) of the filter pressing device (3), receives filter residues pressed and filtered by the filter pressing device (3), and performs crushing and granulating treatment on the filter residues;
the carbonization device (5) is communicated with a third discharge hole (42) of the crushing and granulating device (4), a feeding and spraying mechanism (51) is arranged on the carbonization device (5), and the carbonization device (5) receives the sludge particles formed by the crushing and granulating device (4) and heats the sludge particles; and
and the sewage treatment device (6) is communicated with a liquid outlet (32) in the filter pressing device (3) and adsorbs heavy metal elements in the filtrate.
2. The sludge biological modification and resource treatment system according to claim 1, which is characterized in that: fresh sludge is pumped in by a spiral conveying pipeline (11) arranged on the first biological modifier (1).
3. The sludge biological modification and resource treatment system according to claim 2, characterized in that: the sludge subjected to primary modification in the first biological modifier (1) is input into the second biological modifier (2) for secondary modification treatment through a conveying pipeline (21) for communicating the first biological modifier (1) and the second biological modifier (2).
4. The sludge biological modification and resource treatment system according to claim 1, which is characterized in that: and filter residues pressed and filtered by the filter pressing device (3) are pumped into the crushing and granulating device (4) through a second spiral conveying pipeline (41) which is connected with the filter pressing device (3) and the crushing and granulating device (4).
5. The sludge biological modification and resource treatment system according to claim 1, which is characterized in that: and a heating jacket (43) is arranged outside the crushing and granulating device (4), and the heating jacket (43) is used for drying filter residues in the crushing and granulating device (4).
6. The sludge biological modification and resource treatment system according to claim 5, characterized in that: the heating jacket (43) is communicated with a smoke port (53) on the carbonization device (5) and receives hot smoke discharged by the carbonization device (5).
7. The sludge biological modification and resource treatment system according to claim 1, which is characterized in that: the feeding and spraying mechanism (51) is arranged on the carbonization device (5) and is close to a position communicated with a third discharge hole (42) of the crushing and granulating device (4).
8. The sludge biological modification and resource treatment system according to claim 1, which is characterized in that: and the sewage treatment device (6) is internally provided with ion exchange resin (61), and the ion exchange resin (61) adsorbs heavy metal elements in the filtrate.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109942163A (en) * | 2019-04-18 | 2019-06-28 | 长兴瑷晟环保科技有限公司 | A kind of modified method and system for preparing charcoal of sludge organism |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109942163A (en) * | 2019-04-18 | 2019-06-28 | 长兴瑷晟环保科技有限公司 | A kind of modified method and system for preparing charcoal of sludge organism |
| CN109942163B (en) * | 2019-04-18 | 2024-04-02 | 长兴瑷晟环保科技有限公司 | Method and system for preparing carbon by biological modification of sludge |
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