CN212476487U - Biochemical sludge harmless nutrient soil preparation system - Google Patents
Biochemical sludge harmless nutrient soil preparation system Download PDFInfo
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- CN212476487U CN212476487U CN202020382775.0U CN202020382775U CN212476487U CN 212476487 U CN212476487 U CN 212476487U CN 202020382775 U CN202020382775 U CN 202020382775U CN 212476487 U CN212476487 U CN 212476487U
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Abstract
The utility model relates to a nutrient soil system is made to innoxious of biochemical mud, include: the system comprises an intelligent control unit, a pretreatment unit, a hydrolysis heat treatment unit, a filter-pressing dehydration unit and a nutrient soil preparation unit; the intelligent control unit is respectively in control connection with the pretreatment unit, the hydrolysis heat treatment unit, the filter-pressing dehydration unit and the nutrient soil preparation unit; the pretreatment unit can be controlled by the intelligent control unit to carry out intelligent homogeneous pretreatment on biochemical sludge to be treated to respectively obtain organic sludge and inorganic garbage; the hydrolysis heat treatment unit can carry out hydrolysis heat treatment on the organic sludge to obtain harmless sludge; the filter-pressing dehydration unit can treat harmless sludge to obtain sludge cakes; the filter-pressing dehydration unit can convey the obtained mud cakes to the nutrient soil preparation unit. The system provided by the utility model realizes the treatment of mud and handles and comprehensive utilization under the prerequisite of safety, environmental protection and economy to reach energy saving and emission reduction and development circular economy's purpose.
Description
Technical Field
The utility model belongs to the technical field of sludge treatment, especially, relate to a nutrient soil system is made to innoxious of biochemical mud.
Background
With the acceleration of the urbanization process in China and the continuous improvement of the sewage treatment rate, the yield of sludge of urban sewage treatment plants is greatly increased, and according to statistics, the amount of sludge generated in China every year exceeds 5000 million (calculated by 80 percent of water content). The proper treatment of municipal sludge has become a difficult problem in every city in China and has become a bottleneck restricting the further development of sewage treatment plants. The municipal sludge is considered as a potential and available energy resource due to the characteristics of high organic matter content, rich nutrient elements and the like. The sludge treatment aims at realizing reduction, stabilization and harmlessness of sludge, encouraging recovery and utilization of energy and resources in the sludge, and realizing treatment and comprehensive utilization of the sludge on the premise of safety, environmental protection and economy so as to achieve the aims of energy conservation, emission reduction and development of circular economy.
SUMMERY OF THE UTILITY MODEL
Technical problem to be solved
In order to solve the problems in the prior art, the utility model provides a nutrient soil system is made to biochemical mud's innoxious.
(II) technical scheme
In order to achieve the above object, the utility model discloses a main technical scheme include:
a system for harmless preparation of nutrient soil from biochemical sludge comprises: the system comprises an intelligent control unit, a pretreatment unit, a hydrolysis heat treatment unit, a filter-pressing dehydration unit and a nutrient soil preparation unit;
the intelligent control unit is respectively in control connection with the pretreatment unit, the hydrolysis heat treatment unit, the filter-pressing dehydration unit and the nutrient soil preparation unit;
the pretreatment unit can be controlled by the intelligent control unit to carry out intelligent homogeneous pretreatment on biochemical sludge to be treated so as to respectively obtain organic sludge and inorganic garbage;
the pretreatment unit and the hydrolysis heat treatment unit can convey the obtained organic sludge to the hydrolysis heat treatment unit;
the hydrolysis heat treatment unit can carry out hydrothermal treatment on the organic sludge to obtain harmless sludge;
the hydrolysis heat treatment unit can convey harmless sludge to the filter-pressing dehydration unit;
the filter-pressing dehydration unit can treat harmless sludge to obtain mud cakes and filter residues;
the filter-pressing dehydration unit can convey obtained mud cakes and filter residues to the nutrient soil preparation unit for preparing and obtaining nutrient soil.
Preferably, the hydrolysis heat treatment unit comprises: the device comprises a feeding bin, a feeding tank, a heating tank and a steam generator;
the feeding bin is used for storing biochemical sludge and can transmit the internally stored biochemical sludge to the feeding tank according to the requirement;
the feeding tank is used for storing biochemical sludge to be treated and can transmit the internally stored biochemical sludge to the heating tank as required;
the steam generator is used for generating steam and guiding the generated steam into the heating tank according to requirements so as to heat biochemical sludge in the heating tank;
the biochemical sludge in the heating tank can achieve the purpose of harmless treatment through hydrothermal reaction and biochemical reaction;
a feed inlet and a discharge outlet are formed in the feed bin;
the feed inlet is communicated with the pretreatment unit;
the discharge port is communicated with the feeding tank.
Preferably, a first conveying pipeline is arranged between the feeding tank and the heating tank;
a second conveying pipeline is arranged between the steam generator and the heating tank;
the feed tank conveys organic sludge into the heating tank through the first conveying pipeline;
the steam generator can deliver steam into the heating tank through the second delivery pipe.
Preferably, the hydrolysis heat treatment unit further comprises: a diaphragm pump;
the diaphragm pump is located on the first conveying pipe between the feed tank and the heating tank;
the feed tank delivers organic sludge into the heating tank by means of the power of the diaphragm pump.
Preferably, the press filtration dewatering unit comprises: plate-and-frame filter presses, hydraulic pumps and air compressors;
a third conveying pipeline is arranged between the heating tank and the plate-and-frame filter press;
the hydraulic pump with the air compressor machine homoenergetic is for the plate and frame filter press provides drive power for accomplish and carry out the filter-pressing to innoxious mud and handle.
Preferably, the nutrient soil preparation unit includes: the device comprises a mud cake conveying device, a mud cake crusher, a biological bacterium blending agent storage device and a mixing and stirring device;
the mud cake conveying device is in butt joint with the plate-and-frame filter press and can convey mud cakes and filter residues prepared in the plate-and-frame filter press to the mud cake crusher;
the mud cake crusher can crush and polish mud cakes and filter residues into mud powder and can convey the mud powder into the mixing and stirring tank;
the biological bacteria blender storage tank can provide a biological bacteria blender for the mixing and stirring device to prepare nutrient soil.
Preferably, a first intelligent control valve, a second intelligent control valve and a third intelligent control valve are respectively arranged on the first conveying pipeline, the second conveying pipeline and the third conveying pipeline;
the first intelligent control valve, the second intelligent control valve and the third intelligent control valve are respectively used for controlling the opening and closing of the first conveying pipeline, the second conveying pipeline and the third conveying pipeline;
the intelligent control unit is also respectively in control connection with the first intelligent control valve, the second intelligent control valve, the third intelligent control valve, the diaphragm pump, the plate-and-frame filter press, the hydraulic pump, the air compressor, the mud cake conveying device, the mud cake crusher, the biological bacterium blending and storing device and the mixing and stirring device.
The technical scheme also provides a preparation method of nutrient soil of a nutrient soil system prepared by innocent treatment of biochemical sludge based on any one of the schemes, which is characterized by comprising the following steps:
s1, intelligent homogenizing pretreatment: putting biochemical sludge to be treated into a pretreatment unit, and performing impurity removal, crushing, homogenizing and slurrying in an integrated process to obtain organic sludge;
s2, carrying out hydrothermal decomposition treatment: putting the organic sludge in the S1 into a feeding bin, starting an intelligent control unit, and conveying the organic sludge in the feeding bin into a heating tank through a feeding tank for hydrothermal treatment to obtain harmless sludge;
s3, filter pressing dehydration treatment: conveying the harmless sludge to a filter-pressing dehydration unit for filter-pressing dehydration to obtain mud cakes and filter residues, and conveying the obtained mud cakes and filter residues to a mud cake crushing device through a mud cake conveying device;
s4, crushing treatment: the mud cake crushing device crushes and polishes the obtained mud cakes and filter residues into mud powder, and conveys the mud powder into a mixing and stirring tank;
s5, mixing and stirring treatment: the biological bacterium blending agent storage tank is controlled by the intelligent control unit to convey the biological bacterium blending agent into the mixing and stirring tank according to a proper proportion, and the mixing and stirring tank can uniformly stir the mud powder and the biological bacterium blending agent to obtain the nutrient soil.
Preferably, the temperature of the hydrothermolysis reaction in the step S2 is 180-200 ℃;
the cycle of the hydrothermolysis reaction in the step S2 is 4 hours;
the water content of the harmless sludge in the step S2 is 80%;
the step S3 further includes: cooling the sludge input into the filter-pressing dehydration unit to below 90 ℃, then starting a hydraulic pump, pressing a plate frame of a plate-frame filter press to a compact state, and then closing the hydraulic pump; and starting the diaphragm pump, keeping corresponding feeding pressure, pumping the sludge into the filter press, closing the diaphragm pump after the sludge is completely pressed in, starting the air compressor, performing secondary squeezing, starting the hydraulic pump, slowly loosening the filter frame of the filter press, and unloading sludge cakes and filter residues.
Preferably, the biological bacteria blending agent in the step S5 includes: one or more of rhizobium inoculant, azotobacter inoculant, phosphorus dissolving inoculant, silicate inoculant, mycorrhizal inoculant, photosynthetic inoculant, organic material decomposing inoculant, composite inoculant and soil remediation inoculant.
(III) advantageous effects
The utility model has the advantages that: the utility model provides a nutrient soil system is made to innoxious of biochemical mud has following beneficial effect:
the sludge is subjected to harmless treatment through hydrothermal reaction and biochemical reaction, solid phase residue is dehydrated and reduced after plate-frame filter pressing dehydration, and the reduced solid waste can achieve deodorization, plant diseases and insect pests killing and pollutant content reduction. Pathogenic microorganisms in the sludge are thoroughly killed under the high-temperature and high-pressure environment; through the dissolution and passivation of heavy metal at high temperature, the content of heavy metal in the dehydrated mud cake can be obviously reduced, so that the resource utilization can be realized.
The utility model discloses the nutrient soil who makes combines inorganic nutrient element, organic matter, microorganism fungus organic whole, embodies inorganic chemical fertilizer, organic fertilizer and microbial manure's comprehensive effect, is the soil hardening phenomenon of dissolving, restores and takes care of soil, improves chemical fertilizer utilization ratio, improves fruit quality and output's the fertilizer of pushing away first.
Drawings
FIG. 1 is a schematic structural diagram of a system for harmless preparation of nutrient soil from biochemical sludge according to the present invention.
Detailed Description
For a better understanding of the present invention, reference will now be made in detail to the present invention, examples of which are illustrated in the accompanying drawings.
As shown in fig. 1: the embodiment discloses a biochemical sludge treatment system, which comprises: the device comprises an intelligent control unit, a pretreatment unit, a hydrolysis heat treatment unit, a filter-pressing dehydration unit and a nutrient soil preparation unit.
The intelligent control unit is respectively in control connection with the pretreatment unit, the hydrolysis heat treatment unit, the filter-pressing dehydration unit and the nutrient soil preparation unit.
It should be noted that: the intelligent control unit can be a remote PC or other control terminal, such as a remote computer room, and the sensors and monitoring equipment are reasonably arranged in the system plant to collect data.
The pretreatment unit can be controlled by the intelligent control unit to carry out intelligent homogeneous pretreatment on biochemical sludge to be treated so as to respectively obtain organic sludge and inorganic garbage;
specifically, the pretreatment unit and the hydrolysis heat treatment unit can be used for conveying the obtained organic sludge to the hydrolysis heat treatment unit.
The hydrolysis heat treatment unit can carry out hydrothermal treatment on the organic sludge to obtain harmless sludge.
The hydrolysis heat treatment unit can convey harmless sludge to the filter-pressing dehydration unit.
The filter-pressing dehydration unit can treat innoxious sludge to obtain mud cakes and filter residues.
The filter-pressing dehydration unit can convey obtained mud cakes and filter residues to the nutrient soil preparation unit for preparing and obtaining nutrient soil.
The hydrolysis heat treatment unit described in this embodiment includes: feed bin, feed tank, heating jar and steam generator.
The feeding bin is used for storing biochemical sludge and can transmit the internally stored biochemical sludge to the feeding tank according to the requirement.
The feeding tank is used for storing biochemical sludge to be treated and can transmit the internally stored biochemical sludge to the heating tank as required;
the steam generator is used for generating steam and guiding the generated steam into the heating tank according to requirements so as to heat biochemical sludge in the heating tank.
It should be noted that: the steam generator is controlled by the intelligent control unit to generate the required steam for heating the sludge in the heating tank.
The biochemical sludge in the heating tank can achieve the purpose of harmless treatment through hydrothermal reaction and biochemical reaction.
The hydrothermal reaction is a technology that sludge is placed in a closed reaction kettle and heated to a certain temperature for hydrolysis reaction, colloid structures in microbial cells in the sludge are destroyed and viscous organic matters are hydrolyzed under the combined action of the process and pressure, the binding effect of sludge particles on water molecules is reduced, the water distribution in the sludge is fundamentally changed, and therefore the dehydration performance and the anaerobic digestion performance are improved, and the technology is also called thermal conditioning.
The feeding bin is provided with a feeding hole and a discharging hole.
The feed inlet is communicated with the pretreatment unit; the discharge port is communicated with the feeding tank.
In detail, a first conveying pipeline is arranged between the feeding tank and the heating tank; a second conveying pipeline is arranged between the steam generator and the heating tank; the feed tank conveys organic sludge into the heating tank through the first conveying pipeline.
The steam generator can deliver steam into the heating tank through the second delivery pipe.
The hydrolysis heat treatment unit in this embodiment further includes: a diaphragm pump.
The diaphragm pump is located on the first conveying pipe between the feed tank and the heating tank;
the feed tank delivers organic sludge into the heating tank by means of the power of the diaphragm pump.
The press filtration dewatering unit described in this embodiment comprises: plate and frame filter press, hydraulic pump and air compressor machine.
And a third conveying pipeline is arranged between the heating tank and the plate-and-frame filter press. The hydraulic pump with the air compressor machine homoenergetic is for the plate and frame filter press provides drive power for accomplish and carry out the filter-pressing to innoxious mud and handle.
The nutrient soil preparation unit in this embodiment includes: the device comprises a mud cake conveying device, a mud cake crusher, a biological bacterium blending agent storage device and a mixing and stirring device;
the mud cake conveying device is in butt joint with the plate-and-frame filter press and can convey mud cakes and filter residues prepared in the plate-and-frame filter press to the mud cake crusher;
the mud cake crusher can crush and polish mud cakes and filter residues into mud powder and can convey the mud powder into the mixing and stirring tank;
the biological bacteria blender storage tank can provide a biological bacteria blender for the mixing and stirring device to prepare nutrient soil.
In this embodiment, the first conveying pipeline, the second conveying pipeline and the third conveying pipeline are respectively provided with a first intelligent control valve, a second intelligent control valve and a third intelligent control valve.
The first intelligent control valve, the second intelligent control valve and the third intelligent control valve are respectively used for controlling the opening and closing of the first conveying pipeline, the second conveying pipeline and the third conveying pipeline.
The intelligent control unit is also respectively in control connection with the first intelligent control valve, the second intelligent control valve, the third intelligent control valve, the diaphragm pump, the plate-and-frame filter press, the hydraulic pump, the air compressor, the mud cake conveying device, the mud cake crusher, the biological bacterium blending and storing device and the mixing and stirring device.
The embodiment also provides a method for preparing nutrient soil based on the nutrient soil system prepared by harmless biochemical sludge in the embodiment, which comprises the following steps:
s1, intelligent homogenizing pretreatment: putting biochemical sludge to be treated into a pretreatment unit, and performing impurity removal, crushing, homogenizing and slurrying in an integrated process to obtain organic sludge;
s2, carrying out hydrothermal decomposition treatment: putting the organic sludge in the S1 into a feeding bin, starting an intelligent control unit, and conveying the organic sludge in the feeding bin into a heating tank through a feeding tank for hydrothermal treatment to obtain harmless sludge;
s3, filter pressing dehydration treatment: conveying the harmless sludge to a filter-pressing dehydration unit for filter-pressing dehydration to obtain mud cakes and filter residues, and conveying the obtained mud cakes and filter residues to a mud cake crushing device through a mud cake conveying device;
s4, crushing treatment: the mud cake crushing device crushes and polishes the obtained mud cakes and filter residues into mud powder, and conveys the mud powder into a mixing and stirring tank;
s5, mixing and stirring treatment: the biological bacterium blending agent storage tank is controlled by the intelligent control unit to convey the biological bacterium blending agent into the mixing and stirring tank according to a proper proportion, and the mixing and stirring tank can uniformly stir the mud powder and the biological bacterium blending agent to obtain the nutrient soil.
The temperature of the hydrothermal hydrolysis reaction in the step S2 in this example is 180 ℃ to 200 ℃;
the cycle of the hydrothermolysis reaction in the step S2 is 4 hours;
the water content of the detoxified sludge in the step S2 is 80%.
In this embodiment, the step S3 further includes:
cooling the sludge input into the filter-pressing dehydration unit to below 90 ℃, then starting a hydraulic pump, pressing a plate frame of a plate-frame filter press to a compact state, and then closing the hydraulic pump;
and starting the diaphragm pump, keeping corresponding feeding pressure, pumping the sludge into the filter press, closing the diaphragm pump after the sludge is completely pressed in, starting the air compressor, performing secondary squeezing, starting the hydraulic pump, slowly loosening the filter frame of the filter press, and unloading sludge cakes and filter residues.
The biological bacteria blending agent in step S5 in this embodiment includes: one or more of rhizobium inoculant, azotobacter inoculant, phosphorus dissolving inoculant, silicate inoculant, mycorrhizal inoculant, photosynthetic inoculant, organic material decomposing inoculant, composite inoculant and soil remediation inoculant.
In this example, 3 batches of sludge (water content of 80%) of about 0.6t were selected for system debugging. The system parameters are adjusted by detecting the change of the water content before and after the sludge treatment, and finally, the optimized process parameters under the stable and efficient operation condition of the system are obtained.
The best operating parameters of the system are obtained by the debugging: (1) the water content of the sludge is about 80%, the sludge is uniform, the sludge enters a heating tank after mechanical homogenization, and the sludge is kept for a certain time after the steam valve parameters are set and the sludge is automatically heated to the set temperature; (2) cooling the sludge to below 90 ℃; (3) the hydraulic pump is started, the plate frame of the plate-and-frame filter press is pressed to a compact state, the hydraulic pump is closed, the diaphragm pump is started, corresponding feeding pressure is kept, the sludge is pumped into the filter press, after the sludge is completely pressed in, the diaphragm pump is closed, the air compressor is started, secondary squeezing is carried out, the hydraulic pump is started, and the filter frame of the filter press is slowly loosened and the sludge cake is discharged.
Sludge reduction and resource effect
A total of 7 batches of sludge were reduced. The test data are shown in the table.
TABLE 1 sludge weight change of moisture content and contaminant content before and after sludge treatment in 7-family sewage plant in test stage
As can be seen from Table 1, the sludge treatment technique is widely applicable to the direct treatment of dewatered sludge in large-scale Foshan sewage plants. The water content of the treated sludge is reduced to below 50 percent, and the dewatering decrement proportion is 70 to 80 percent. The concentration of the sludge residue pollutants reaches the corresponding regulation of GB4284-2018, and the requirements of sludge stabilization treatment are met. The dewatering and reducing effects of the four municipal sludge and the two printing and dyeing mill sludge are very obvious.
According to the initial data detected by a third party, all the pollutants of the sludge residue reach the GB 4284-2018A-level argillaceous requirement for removing arsenic.
The nutrient soil prepared in the embodiment can be applied to flowers, lawns and the like, can be far away from a food chain, can digest biochemical sludge nearby, and can reduce the dosage of chemical fertilizers. The nutrient soil can also be used for application of forest land, and experiments show that: after a period of application, the height and diameter of the forest trees increase with the amount of the nutrient soil applied.
Claims (7)
1. A nutrient soil system is prepared in innoxious of biochemical mud, its characterized in that includes: the system comprises an intelligent control unit, a pretreatment unit, a hydrolysis heat treatment unit, a filter-pressing dehydration unit and a nutrient soil preparation unit;
the intelligent control unit is respectively in control connection with the pretreatment unit, the hydrolysis heat treatment unit, the filter-pressing dehydration unit and the nutrient soil preparation unit;
the pretreatment unit can be controlled by the intelligent control unit to carry out intelligent homogeneous pretreatment on biochemical sludge to be treated so as to respectively obtain organic sludge and inorganic garbage;
the pretreatment unit and the hydrolysis heat treatment unit can convey the obtained organic sludge to the hydrolysis heat treatment unit;
the hydrolysis heat treatment unit can carry out hydrothermal treatment on the organic sludge to obtain harmless sludge;
the hydrolysis heat treatment unit can convey harmless sludge to the filter-pressing dehydration unit;
the filter-pressing dehydration unit can treat harmless sludge to obtain mud cakes and filter residues;
the filter-pressing dehydration unit can convey obtained mud cakes and filter residues to the nutrient soil preparation unit for preparing and obtaining nutrient soil.
2. The nutrient soil system for harmless preparation of biochemical sludge according to claim 1, wherein the hydrolysis heat treatment unit comprises: the device comprises a feeding bin, a feeding tank, a heating tank and a steam generator;
the feeding bin is used for storing biochemical sludge and can transmit the internally stored biochemical sludge to the feeding tank according to the requirement;
the feeding tank is used for storing biochemical sludge to be treated and can transmit the internally stored biochemical sludge to the heating tank as required;
the steam generator is used for generating steam and guiding the generated steam into the heating tank according to requirements so as to heat biochemical sludge in the heating tank;
the biochemical sludge in the heating tank can achieve the purpose of harmless treatment through hydrothermal reaction and biochemical reaction;
a feed inlet and a discharge outlet are formed in the feed bin;
the feed inlet is communicated with the pretreatment unit;
the discharge port is communicated with the feeding tank.
3. The nutrient soil system for harmless production of biochemical sludge according to claim 2,
a first conveying pipeline is arranged between the feeding tank and the heating tank;
a second conveying pipeline is arranged between the steam generator and the heating tank;
the feed tank conveys organic sludge into the heating tank through the first conveying pipeline;
the steam generator can deliver steam into the heating tank through the second delivery pipe.
4. The nutrient soil system for harmless production of biochemical sludge according to claim 3,
the hydrolysis heat treatment unit further includes: a diaphragm pump;
the diaphragm pump is located on the first conveying pipe between the feed tank and the heating tank;
the feed tank delivers organic sludge into the heating tank by means of the power of the diaphragm pump.
5. The nutrient soil system prepared by innocent treatment of biochemical sludge according to claim 4,
the filter-pressing dehydration unit comprises: plate-and-frame filter presses, hydraulic pumps and air compressors;
a third conveying pipeline is arranged between the heating tank and the plate-and-frame filter press;
the hydraulic pump with the air compressor machine homoenergetic is for the plate and frame filter press provides drive power for accomplish and carry out the filter-pressing to innoxious mud and handle.
6. The nutrient soil system prepared by innocent treatment of biochemical sludge according to claim 5,
the nutrient soil preparation unit comprises: the device comprises a mud cake conveying device, a mud cake crusher, a biological bacterium blending agent storage device and a mixing and stirring device;
the mud cake conveying device is in butt joint with the plate-and-frame filter press and can convey mud cakes and filter residues prepared in the plate-and-frame filter press to the mud cake crusher;
the mud cake crusher can crush and polish mud cakes and filter residues into mud powder and can convey the mud powder to the mixing and stirring device;
the biological bacteria blender storage tank can provide a biological bacteria blender for the mixing and stirring device to prepare nutrient soil.
7. The nutrient soil system prepared by innocent treatment of biochemical sludge according to claim 6,
a first intelligent control valve, a second intelligent control valve and a third intelligent control valve are respectively arranged on the first conveying pipeline, the second conveying pipeline and the third conveying pipeline;
the first intelligent control valve, the second intelligent control valve and the third intelligent control valve are respectively used for controlling the opening and closing of the first conveying pipeline, the second conveying pipeline and the third conveying pipeline;
the intelligent control unit is also respectively in control connection with the first intelligent control valve, the second intelligent control valve, the third intelligent control valve, the diaphragm pump, the plate-and-frame filter press, the hydraulic pump, the air compressor, the mud cake conveying device, the mud cake crusher, the biological bacterium blending and storing device and the mixing and stirring device.
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| CN202020382775.0U CN212476487U (en) | 2020-03-23 | 2020-03-23 | Biochemical sludge harmless nutrient soil preparation system |
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| CN202020382775.0U CN212476487U (en) | 2020-03-23 | 2020-03-23 | Biochemical sludge harmless nutrient soil preparation system |
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