CN212451117U - Biochemical sludge treatment system - Google Patents
Biochemical sludge treatment system Download PDFInfo
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- CN212451117U CN212451117U CN202020382796.2U CN202020382796U CN212451117U CN 212451117 U CN212451117 U CN 212451117U CN 202020382796 U CN202020382796 U CN 202020382796U CN 212451117 U CN212451117 U CN 212451117U
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Abstract
The utility model relates to a processing system of biochemical mud, include: the system comprises an intelligent control unit, a pretreatment unit, a hydrolysis heat treatment unit and a filter-pressing dehydration unit; the intelligent control unit is respectively in control connection with the pretreatment unit, the hydrolysis heat treatment unit and the filter-pressing dehydration 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; a pretreatment unit and a hydrolysis heat treatment unit which 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 the innoxious sludge to obtain mud cakes and filter residues. The utility model provides a processing system can carry out innocent treatment through hydrothermal reaction and biochemical reaction to mud.
Description
Technical Field
The utility model belongs to the technical field of sludge treatment, especially, relate to a processing system 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 above problems in the prior art, the utility model provides a biochemical sludge treatment system.
(II) technical scheme
In order to achieve the above object, the utility model discloses a main technical scheme include:
a system for treating biochemical sludge, comprising: the system comprises an intelligent control unit, a pretreatment unit, a hydrolysis heat treatment unit and a filter-pressing dehydration unit;
the intelligent control unit is respectively in control connection with the pretreatment unit, the hydrolysis heat treatment unit and the filter-pressing dehydration 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 innoxious sludge to obtain mud cakes and filter residues.
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.
Preferably, a feeding hole and a discharging hole are formed in the feeding 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, 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 and the air compressor.
The technical scheme also provides a sludge treatment method based on the biochemical sludge treatment system, which comprises the following steps:
s1, intelligent homogenizing pretreatment: putting biochemical sludge to be treated into a pretreatment unit, and removing impurities, crushing, homogenizing and slurrying the biochemical sludge 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: and conveying the harmless sludge into a filter-pressing dehydration unit for filter-pressing dehydration to obtain mud cakes and filter residues.
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 detoxified sludge in the step S2 is 80%.
Preferably, 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.
(III) advantageous effects
The utility model has the advantages that: the utility model provides a biochemical sludge's processing system has following beneficial effect:
biochemical sludge (containing about 80% of water) is subjected to harmless treatment through hydrothermal reaction (without process water) and biochemical reaction at a certain temperature and pressure (180-200 ℃), solid phase residue is dehydrated and reduced through plate-and-frame filter pressing dehydration, and the reduced solid waste can achieve deodorization, pest and disease 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.
Drawings
Fig. 1 is a schematic structural diagram of a biochemical sludge treatment system provided by 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 and a filter-pressing dehydration unit.
The intelligent control unit is respectively in control connection with the pretreatment unit, the hydrolysis heat treatment unit and the filter-pressing dehydration 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 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.
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 and the air compressor.
The embodiment also provides a sludge treatment method based on the biochemical sludge treatment system, which comprises the following steps:
s1, intelligent homogenizing pretreatment: putting biochemical sludge to be treated into a pretreatment unit, and removing impurities, crushing, homogenizing and slurrying the biochemical sludge 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: and conveying the harmless sludge into a filter-pressing dehydration unit for filter-pressing dehydration to obtain mud cakes and filter residues.
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.
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.
Claims (7)
1. A biochemical sludge treatment system, comprising: the system comprises an intelligent control unit, a pretreatment unit, a hydrolysis heat treatment unit and a filter-pressing dehydration unit;
the intelligent control unit is respectively in control connection with the pretreatment unit, the hydrolysis heat treatment unit and the filter-pressing dehydration 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 innoxious sludge to obtain mud cakes and filter residues.
2. The biochemical sludge treatment system according to claim 1, wherein the hydrolysis heat treatment unit includes: 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.
3. The system for biochemical sludge treatment according to claim 2,
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.
4. The biochemical sludge treatment system according to claim 3,
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.
5. The biochemical sludge treatment system according to claim 4,
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.
6. The biochemical sludge treatment system according to claim 5,
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.
7. The biochemical sludge treatment system 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 and the air compressor.
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| CN202020382796.2U CN212451117U (en) | 2020-03-23 | 2020-03-23 | Biochemical sludge treatment system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111362546A (en) * | 2020-03-23 | 2020-07-03 | 广东象博生态科技有限公司 | Treatment system and treatment method of biochemical sludge |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111362546A (en) * | 2020-03-23 | 2020-07-03 | 广东象博生态科技有限公司 | Treatment system and treatment method of biochemical sludge |
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