CN216273661U - Sludge homogenizing and pyrolyzing system - Google Patents
Sludge homogenizing and pyrolyzing system Download PDFInfo
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- CN216273661U CN216273661U CN202122945864.9U CN202122945864U CN216273661U CN 216273661 U CN216273661 U CN 216273661U CN 202122945864 U CN202122945864 U CN 202122945864U CN 216273661 U CN216273661 U CN 216273661U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/40—Valorisation of by-products of wastewater, sewage or sludge processing
Abstract
The utility model discloses a sludge homogenizing and pyrolyzing system and a sludge homogenizing and antipyretic method.A sludge storage bin and a medicament slurrying tank are respectively connected with an input port of a homogenizing and pyrolyzing device through pipelines; the homogeneous pyrolysis device, the multistage flash evaporator, the first filtering and caching device and the solid-liquid separation device are sequentially connected, a liquid phase outlet of the solid-liquid separation device is connected with the precipitation and filtering device through a pipeline, and a solid phase output port of the solid-liquid separation device is connected with the residue bin; the evaporator and a finished product storage warehouse are connected in series after the precipitation filtering device. The utility model carries out the homogeneous pyrolysis treatment on the sludge, leads the sludge and the medicament to be evenly mixed and then carries out the pyrolysis reaction after the treatment, destroys the microbial micelle in the sludge, and breaks and decomposes the microbial cells and extracellular polymeric substances in the microbial micelle to form resource utilization products which mainly comprise active polypeptide and amino acid.
Description
Technical Field
The utility model relates to the technical field of sludge treatment and disposal of municipal sewage plants, in particular to a sludge homogenizing and pyrolyzing system.
Background
The sludge in sewage plants is a byproduct of sewage treatment, and the current mainstream process of town sewage treatment is basically revolutionary and improved mainly by an early activated sludge biochemical method. With the continuous development of the nation and the urbanization, the urban industrial wastewater and the domestic wastewater are increased continuously, the treatment scale of municipal sewage treatment plants specially used for treating the domestic wastewater in cities is increased, the construction and the operation of sewage treatment plants are accompanied by the generation of a large amount of excess sludge, and the sludge treatment situation is very severe. Due to the particularity of the generation mode of the sludge, the sludge has complex physicochemical and biological characteristics, a large amount of pathogenic bacteria, microbial populations, organic pollutants, heavy metals and the like exist in the sludge, and the sludge cannot be properly treated and disposed, so that secondary pollution and greater risk are caused to the environment.
The sludge treatment and disposal requirements are to achieve the reduction, stabilization, harmlessness and reclamation of sludge. At present, the final treatment mode of sludge treatment aims at obtaining the maximum recycling of resources after the reduction, stabilization and harmlessness of the front-end treatment of sludge are completed. The treatment modes and measures for sludge treatment are different at home and abroad, and the treatment target of sludge resource recycling is the mainstream of future development by combining the green development advocated in China and the actual national situation of double-carbon economy. At present, the commonly used method and technology for sludge treatment in China are mainly used for landfill after stabilization and harmless treatment, or treatment by anaerobic digestion and aerobic fermentation, and the treatment mode for relatively completing resource utilization is drying incineration. However, the reduction of sludge treatment is not thorough, the resource utilization is not sufficient, and the unstable and unsmooth production operation is still a bottleneck restricting the application and development of corresponding technologies.
Chinese patent 200910245146.1 discloses a system and method for extracting microbial protein by hydrolyzing sludge, which mainly extracts microbial protein from sludge and utilizes the good foaming performance of the microbial protein, but the microbial protein has relatively low output quality and output rate and is unstable; the sludge and the medicament are mixed in the mixing device and then enter the reaction kettle, and the defects are that the integral action time of the sludge and the medicament is prolonged, and the centralized utilization of heat is not utilized; the sludge is subjected to solid-liquid separation after passing through the hydrolysis reaction device and the flash evaporation device, and the solid-liquid separation effect has an unstable condition, so that the extraction effect of microbial protein is influenced.
SUMMERY OF THE UTILITY MODEL
Aiming at the problems, the utility model provides a sludge homogenizing pyrolysis system and a sludge homogenizing and heat-clearing method, so that a resource utilization product mainly comprising active polypeptide and amino acid is obtained, and the yield is stable, high in yield quality and high in yield through process route control.
In order to achieve the purpose, the technical scheme adopted by the utility model is as follows:
a mud homogeneous pyrolysis system, a mud storage bin and a medicament slurrying tank are respectively connected with an input port of a homogeneous pyrolysis device through pipelines; the homogeneous pyrolysis device, the multistage flash evaporator, the first filtering and caching device and the solid-liquid separation device are sequentially connected, a liquid phase outlet of the solid-liquid separation device is connected with the precipitation and filtering device through a pipeline, and a solid phase output port of the solid-liquid separation device is connected with the residue bin; the evaporator and a finished product storage warehouse are connected in series after the precipitation filtering device;
the multistage flash evaporator is connected with a heat exchange condenser, and the heat exchange condenser is connected to the medicament slurrying tank through a pipeline;
the first filtering cache device is connected with a medicament adding device, and a filter aid is stored in the medicament adding device.
As a further improvement of the above technical solution:
the medicament in the medicament slurrying tank is one or a combination of more of active calcium oxide, calcium hydroxide, inorganic calcium salt and a catalyst.
The filter aid of the agent adding device is organic composite flocculant or wood dust.
A second filtering and caching device is arranged between the precipitation filtering device and the evaporator.
Be equipped with the plunger pump between storage mud storehouse and the homogeneity pyrolysis device, be equipped with the screw pump between medicament pulp jar and the homogeneity pyrolysis device, air power source has between multistage flash vessel and the first buffer memory device that filters, is equipped with the screw pump between first buffer memory device and the solid-liquid separation device, and solid-liquid separation device and deposit are filtered out and are equipped with the pump between the device, are equipped with screw conveyor between solid-liquid separation device and the residue feed bin.
The homogeneous pyrolysis device is provided with a stirring device and a heating device; a stirrer is arranged in the first filtering cache device; the solid-liquid separation device is a plate-and-frame filter press, a high-pressure belt filter or a screw stacking machine; the precipitation filtering device is an inclined plate precipitation device or a gravity rotational flow precipitation device.
The utility model has the following beneficial effects:
the sludge is subjected to homogeneous pyrolysis treatment, the sludge and the medicament are uniformly mixed after the treatment, then the pyrolysis reaction is carried out, microbial micelles in the sludge are destroyed, and microbial cells and extracellular polymers in the microbial micelles are broken and decomposed to form resource utilization products which mainly comprise active polypeptide and amino acid; the adding amount proportion of the pyrolysis medicament is 3-5%, the change of the internal structure of the process device is avoided, the pyrolysis effect is maintained, and the resource utilization product with stable quality and high yield is obtained; the filter aid is added before the sludge pyrolysis liquid-solid separation, and the liquid phase part and the solid phase part of the sludge pyrolysis liquid are fully separated, so that the liquid phase part is recycled to the greatest extent, and the quality of the resource utilization product is improved.
Drawings
FIG. 1 is a schematic diagram of the system of the present invention.
Reference numerals: 1. a sludge storage bin; 2. a medicament slurrying tank; 3. a homogeneous pyrolysis device; 4. a multi-stage flash evaporator; 5. a heat exchange condenser; 6. a first filtering cache device; 7. a solid-liquid separation device; 8. a precipitation filtering device; 9. an evaporator; 10. a finished product repository; 11. a residue bin; 12. a medicament adding device; 13. and the second filtering and caching device.
Detailed Description
The following describes embodiments of the present invention with reference to the drawings.
As shown in fig. 1, a sludge storage bin 1 and a reagent slurrying tank 2 of the sludge homogeneous pyrolysis system are respectively connected with an input port of a homogeneous pyrolysis device 3 through a pipeline; an output port of the homogeneous pyrolysis device 3 is connected with an input port of the multi-stage flash evaporator 4 through a pipeline, the multi-stage flash evaporator 4 is connected with a heat exchange condenser 5, the heat exchange condenser 5 is connected to the reagent slurrying tank 2 through a pipeline, and hot steam after heat exchange of the heat exchange condenser 5 can return to the reagent slurrying tank 2 for recycling; an output port of the multi-stage flash evaporator 4 is connected with an input port of the first filtering cache device 6 through a pipeline, the first filtering cache device 6 is connected with a medicament adding device 12, and the medicament adding device 12 can add a filter aid into the first filtering cache device 6; an output port of the first filtering and caching device 6 is connected with an input port of the solid-liquid separation device 7 through a pipeline, a liquid phase output port of the solid-liquid separation device 7 is connected with an input port of the precipitation and filtration device 8 through a pipeline, and a solid phase output port of the solid-liquid separation device 7 is connected to the residue bin 11; the sedimentation filtering device 8 is sequentially connected with a second filtering and caching device 13, an evaporator 9 and a finished product storage warehouse 10 in series.
A plunger pump is arranged between the sludge storage bin 1 and the homogeneous pyrolysis device 3, and the sludge in the sludge storage bin 1 is conveyed to the sludge homogeneous pyrolysis device 3 through the plunger pump. And a screw pump is arranged between the agent slurrying tank 2 and the homogeneous pyrolysis device 3, and the agent in the agent slurrying tank 2 is conveyed to the sludge homogeneous pyrolysis device 3 through the screw pump.
An air power source is arranged between the multistage flash evaporator 4 and the first filtering cache device 6, and the sludge pyrolysis liquid after flash evaporation and cracking are completed in the multistage flash evaporator 4 is conveyed to the first filtering cache device 6 through the air power source.
A stirrer is arranged in the first filtering and caching device 6.
A screw pump is arranged between the first filtering cache device 6 and the solid-liquid separation device 7, and sludge pyrolysis liquid in the first filtering cache device 6 is uniformly conveyed to the solid-liquid separation device 7 through the screw pump.
The solid-liquid separation device 7 can be a plate-and-frame filter press, a high-pressure belt filter and a screw stacking machine.
A pump is arranged between the solid-liquid separation device 7 and the precipitation filtering device 8.
The precipitation filtering device 8 is an inclined plate precipitation device or a gravity cyclone precipitation device.
A screw conveying device is arranged between the solid-liquid separation device 7 and the residue bin 11.
The specific method for the sludge pyrolysis treatment by the sludge homogeneous pyrolysis system comprises the following steps:
s10, carrying out homogeneous pyrolysis on the sludge, conveying the sludge with the water content of about 80-90% in the sludge storage bin 1 to the sludge homogeneous pyrolysis device 3 through a plunger pump, synchronously conveying the medicament in the medicament slurrying tank 2 to the sludge homogeneous pyrolysis device 3 through a screw pump, forming a homogeneous material through efficient stirring, closing all valves of the homogeneous pyrolysis device 3, gradually heating the mixed material to a pyrolysis temperature, controlling the pyrolysis temperature at 120-180 ℃, carrying out heat preservation and pressure maintenance for 1-4 hours, and maintaining the pressure within 1MPa to complete the homogeneous pyrolysis reaction. The medicament in the medicament slurrying tank 2 is one or a combination of more of active calcium oxide, calcium hydroxide, inorganic calcium salt and a catalyst, the addition proportion of the medicament is 3-5%, the change of the internal structure of a process device can be avoided, the pyrolysis effect is kept, and the resource utilization product with stable quality and high yield is obtained.
S20, carrying out flash evaporation cracking heat exchange on the sludge, forming a mixed material after a homogeneous pyrolysis process, inputting the mixed material into the multi-stage flash evaporator 4, finishing flash evaporation cracking through instant pressure release to form sludge pyrolysis liquid, and simultaneously carrying out heat exchange condensation on the sludge pyrolysis liquid synchronously by the heat exchange condenser 5 to reduce the temperature of the sludge pyrolysis liquid to be below 80 ℃; the hot steam after heat exchange in the heat exchange condenser 5 returns to the medicament slurrying tank 2 for recycling.
S30, performing solid-liquid separation on the sludge, conveying the sludge pyrolysis liquid subjected to flash evaporation cracking to the first filtering cache device 6 through an air power source, uniformly mixing the sludge pyrolysis liquid with the stirrer in the first filtering cache device 6, uniformly stirring the sludge pyrolysis liquid in the first filtering cache device 6, and then uniformly conveying the sludge pyrolysis liquid into the solid-liquid separation device 7 through a screw pump for solid-liquid separation to obtain pyrolysis filtrate and pyrolysis residues. After the sludge pyrolysis liquid is conveyed into the first filtering and caching device 6, the filter aid can be added into the first filtering and caching device 6 through the medicament adding device 12, the added filter aid can be an organic composite flocculant or wood chips, and the filter aid sufficiently separates the liquid phase and the solid phase part of the sludge pyrolysis liquid, so that the liquid phase part is recycled to the greatest extent, and the quality of resource utilization products is improved.
S40, recovering pyrolysis filtrate, filtering and precipitating the pyrolysis filtrate generated in the solid-liquid separation device 7 through a precipitation filtering device 8, then pumping the pyrolysis filtrate to a second filtering cache device 13 for reprocessing, collecting clear liquid filtered by the second filtering cache device 13, then concentrating the clear liquid through an evaporator 9, concentrating the clear liquid by 20-25 times to form organic chelated calcium concentrated solution, and conveying the obtained concentrated solution to a finished product storage warehouse 10 for storage; the concentrated solution mainly contains active polypeptide chelated calcium, amino acid and the like, and the functional organic liquid fertilizer is formed after further production and compounding.
Pyrolysis residues generated in the S50 pyrolysis residue recycling solid-liquid separation device 7 enter the conical residue bin 11 through the spiral conveying device to be collected in a centralized mode, the collected pyrolysis residues can be further composted and decomposed to form a soil conditioner for recycling, and the pyrolysis residues can also enter a garbage power plant or a thermal power plant to be used as auxiliary fuel for co-combustion.
Analyzing the nutrient components and properties of the organic chelated calcium concentrated solution obtained in the step S40, wherein the organic chelated calcium concentrated solution comprises free amino acids, medium trace elements and the like, the content of the free amino acids can exceed 60g/L, the concentrations of glycine, alanine and glutamic acid are higher, the glycine has a unique effect on crop photosynthesis, the growth of crops is facilitated, and the content of crop sugar is increased; alanine is beneficial to increasing the synthesis of chlorophyll, regulating and opening stomata and resisting virus invasion; glutamic acid effectively reduces the content of nitrate in crops, improves the germination rate of seeds, promotes the photosynthesis of leaves and increases the biosynthesis of chlorophyll. The organic chelated calcium concentrated solution contains rich medium and trace elements, wherein the content of calcium, iron, magnesium, zinc and other elements is higher, and particularly, the calcium element far exceeds the national medium element water soluble fertilizer industry standard.
And analyzing the nutrient components and properties of the pyrolysis residue obtained in the step S50, wherein the analysis results comprise water content, acidity and alkalinity, EC value, total nitrogen, total phosphorus, total potassium, medium elements and the like, the water content is 32.9%, the pH value is 12.06, the organic matter content is 21.58%, the total nutrient is 4.03%, the calcium content is 17.9%, the magnesium content is 1.0%, and the zinc content is 369.3 mg/kg. After composting and decomposition are finished after certain treatment, all indexes can reach the requirements of related national indexes.
And analyzing the physical and chemical properties of the pyrolysis residue obtained in the step S50, wherein the physical and chemical properties comprise water content, organic matters, heat value and the like, the water content is 31.2%, the organic matter content is 58%, and the low-grade heat value is 6324kJ/kg, so that the pyrolysis residue is favorable for being used as a combustion auxiliary material for co-combustion.
The utility model carries out the homogeneous pyrolysis treatment on the sludge, leads the sludge and the medicament to be evenly mixed and then carries out the pyrolysis reaction after the treatment, destroys the microbial micelle in the sludge, and breaks and decomposes the microbial cells and extracellular polymeric substances in the microbial micelle to form resource utilization products which mainly comprise active polypeptide and amino acid.
The foregoing description is illustrative of the present invention and is not to be construed as limiting thereof, as the utility model may be modified in any manner without departing from the spirit thereof.
Claims (5)
1. The utility model provides a mud homogeneity pyrolysis system which characterized in that: the mud storage bin (1) and the medicament slurrying tank (2) are respectively connected with an input port of the homogeneous pyrolysis device (3) through pipelines; the homogeneous pyrolysis device (3), the multistage flash evaporator (4), the first filtering and caching device (6) and the solid-liquid separation device (7) are sequentially connected, a liquid-phase outlet of the solid-liquid separation device (7) is connected with the precipitation and filtration device (8) through a pipeline, and a solid-phase outlet of the solid-liquid separation device (7) is connected with the residue bin (11); the rear part of the precipitation filtering device (8) is connected in series with an evaporator (9) and a finished product storage warehouse (10);
the multistage flash evaporator (4) is connected with a heat exchange condenser (5), and the heat exchange condenser (5) is connected to the medicament slurrying tank (2) through a pipeline;
the first filtering cache device (6) is connected with a medicament adding device (12), and a filter aid is stored in the medicament adding device (12).
2. The system for homogenous pyrolysis of sludge according to claim 1, wherein: the filter aid of the agent adding device (12) is an organic composite flocculant or wood chips.
3. The system for homogenous pyrolysis of sludge according to claim 1, wherein: a second filtering and buffering device (13) is arranged between the precipitation filtering device (8) and the evaporator (9).
4. The system for homogenous pyrolysis of sludge according to claim 1, wherein: store up and be equipped with the plunger pump between mud storehouse (1) and homogeneity pyrolysis device (3), be equipped with the screw pump between medicament slurrying jar (2) and homogeneity pyrolysis device (3), air power source has between multistage flash vessel (4) and first filtration buffer memory device (6), be equipped with the screw pump between first filtration buffer memory device (6) and solid-liquid separation device (7), solid-liquid separation device (7) and deposit filter out and be equipped with the pump between device (8), be equipped with screw conveyor between solid-liquid separation device (7) and residue feed bin (11).
5. The system for homogenous pyrolysis of sludge according to claim 1, wherein: the homogeneous pyrolysis device (3) is provided with a stirring device and a heating device; a stirrer is arranged in the first filtering cache device (6); the solid-liquid separation device (7) is a plate-and-frame filter press, a high-pressure belt filter or a screw stacking machine; the sedimentation filtering device (8) is an inclined plate sedimentation device or a gravity rotational flow sedimentation device.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202122945864.9U CN216273661U (en) | 2021-11-29 | 2021-11-29 | Sludge homogenizing and pyrolyzing system |
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| CN202122945864.9U CN216273661U (en) | 2021-11-29 | 2021-11-29 | Sludge homogenizing and pyrolyzing system |
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| CN216273661U true CN216273661U (en) | 2022-04-12 |
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