CN103130388A - Sludge treatment and resource utilization method based on pyrohydrolysis and application thereof - Google Patents
Sludge treatment and resource utilization method based on pyrohydrolysis and application thereof Download PDFInfo
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- CN103130388A CN103130388A CN201210212062XA CN201210212062A CN103130388A CN 103130388 A CN103130388 A CN 103130388A CN 201210212062X A CN201210212062X A CN 201210212062XA CN 201210212062 A CN201210212062 A CN 201210212062A CN 103130388 A CN103130388 A CN 103130388A
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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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
- Y02A40/10—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in agriculture
- Y02A40/20—Fertilizers of biological origin, e.g. guano or fertilizers made from animal corpses
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- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E50/00—Technologies for the production of fuel of non-fossil origin
- Y02E50/10—Biofuels, e.g. bio-diesel
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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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E50/00—Technologies for the production of fuel of non-fossil origin
- Y02E50/30—Fuel from waste, e.g. synthetic alcohol or diesel
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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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/50—Improvements relating to the production of bulk chemicals
- Y02P20/54—Improvements relating to the production of bulk chemicals using solvents, e.g. supercritical solvents or ionic liquids
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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
- Y02W10/10—Biological treatment of water, waste water, or sewage
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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
- Y02W30/00—Technologies for solid waste management
- Y02W30/40—Bio-organic fraction processing; Production of fertilisers from the organic fraction of waste or refuse
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Abstract
The invention belongs to the technical field of sludge treatment, and discloses a sludge treatment and resource utilization method based on pyrohydrolysis and application of the sludge treatment and resource utilization method based on the pyrohydrolysis. The sludge treatment and resource utilization method based on the pyrohydrolysis comprises injecting sludge with moisture content of 75%-90% into a reaction kettle, then injecting saturated steam with pressure of 1.5MPa-2.5MPa into the reaction kettle, stopping injecting the saturated steam when the temperature of the sludge reaches 150DEG C-185DEG C, maintaining the state for 0-25min, and obtaining slurry of the pyrohydrolysis; carrying out mechanical dehydration on the slurry, and obtaining desorption liquid and dehydration mud cakes; and carrying out an anaerobic digestion reaction on the desorption liquid, and obtaining methane. Processing temperature of the pyrohydrolysis is low, heating time of the sludge and total processing time of the sludge treatment and resource utilization method can remarkably reduced, processing efficiency is improved, energy consumption is reduced, and cost is saved. The dehydration mud cakes obtained by the sludge treatment and resource utilization method can serve as raw materials of organic fertilizer, the obtained methane can be used for fuel of a boiler system, and finally reduction, harmless performance and recycling of the sludge are achieved.
Description
Technical field
The invention belongs to technical field of sludge treatment, and relate to a kind for the treatment of process of mud.More specifically, the present invention relates to a kind of sludge treatment based on thermal hydrolysis and resource utilization method and application thereof.
Background technology
Dewatered sludge is the Main By product that produces in sewage treatment process, it not only contains abundant moisture, organism and microorganism, and contain the multiple objectionable impuritiess that cause environmental pollution such as heavy metal, so the improper processing of mud probably causes secondary environmental pollution.For avoiding the generation of the problems referred to above, develop successively at present some method for sludge treatment and device, with the harmful substance contents in expectation reduction mud, and by sludge treatment, it is carried out the secondary recovery utilization.Wherein, the sludge disposal technology that comprises thermal hydrolysis processing, processed and remove the liquid reuse is a kind of effective method for sludge treatment.But existing method for sludge treatment mainly has the following disadvantages:
(1) need treat lignin-sludge before the thermal hydrolysis reaction and carry out as mixing the pre-treatment such as homogeneous, preheating pulp, need to adopt flash steam step-down and cooling after this reaction finishes; Complex process, and pre-treatment and the step-down process consuming time many, cause processing efficiency limited; Pre-treatment and step-down process all relate to the use of pressurized vessel, have increased equipment investment cost and maintenance cost;
(2) usually carry out long hydrolysis reaction under higher than the hot conditions of 190 ℃, steam consumption is large, energy consumption cost is high, and it is long to be heated to the heat-up time that the high temperature more than 190 ℃ consumes;
(3) usually adopt autoclave diaphragm formula pressure filter to dewater, cause dehydration equipment investment and maintenance cost to increase, and cause energy consumption to increase;
(4) moisture content of the cake that obtains after mechanical dehydration is still higher than 55%, the sludge calorific value of this water ratio is low, can't self-sustaining burning, if therefore need through further processed or other treatment process (for example adding the high additive of calorific value) as biomass fuel, reduced the comprehensive utilization value of sludge treatment.
Summary of the invention
The technical problem to be solved in the present invention is, energy consumption for method for sludge treatment of the prior art is large, length consuming time, processing efficiency is low, equipment cost is high and dehydrated sludge cake can't be directly as the defective of biomass fuel, provide a kind of energy consumption little, consuming time short, processing efficiency is high, equipment cost is low and can realize to greatest extent the mud integrated conduct method based on thermal hydrolysis that recycling sludge utilizes.
The technical problem to be solved in the present invention is achieved by the following technical programs: a kind of mud integrated conduct method based on thermal hydrolysis is provided, said method comprising the steps of:
S1, thermal hydrolysis step: be that 75～90% mud injects reactor with water ratio, with injecting the saturation steam of 1.5-2.5MPa in backward reactor, when the temperature of mud reaches 150～185 ℃, stop injecting saturation steam and keep after 0 ~ 25 minute obtaining the mud of thermal hydrolysis;
S2, mechanical dehydration step: described mud is carried out mechanical dehydration, obtain removing liquid and dehydrated sludge cake;
S3, anaerobic digestion producing methane step: the described liquid that removes makes biogas through the anaerobic digestion reaction.
In above-mentioned mud integrated conduct method based on thermal hydrolysis, described method also comprises:
S4, biogas recycling step: the biogas that makes in described step S3 is acted as a fuel to be returned to steam boiler and prepares saturation steam.
In above-mentioned mud integrated conduct method based on thermal hydrolysis, the water ratio that injects mud in described step S1 in the reactor is 80～85%.
In above-mentioned mud integrated conduct method based on thermal hydrolysis, in described step S1, inject the saturation steam of 1.8～2.3Mpa in the reactor.
In above-mentioned mud integrated conduct method based on thermal hydrolysis, in described step S1, when the temperature of described mud reaches 160～170 ℃, stop injecting saturation steam and kept 10～15 minutes.
In above-mentioned mud integrated conduct method based on thermal hydrolysis, in described step S1, the temperature of described mud is the temperature of cold zone in described reactor.
In above-mentioned mud integrated conduct method based on thermal hydrolysis, whipping appts is equipped with in described reactor inside, and described step S1 also is included in to inject and starts described whipping appts after described mud and stir mud.Stirring operation can promote fully contacting of mud and saturation steam, improves the thermal hydrolysis reaction of heat exchanger effectiveness, accelerate sludge.Explanation is in addition, although all start whipping appts after injecting mud herein and in subsequent embodiment, this mode that is not limited to is controlled in the use of whipping appts.In other words, start whipping appts after also can or beginning to inject saturation steam in the process of injecting mud.
In above-mentioned mud integrated conduct method based on thermal hydrolysis, further comprising the steps of between described step S1 and S2:
S11: the steam discharge pressure release is also discharged described mud; And
S12: make the described mud of discharge cooling.
In above-mentioned mud integrated conduct method based on thermal hydrolysis, in described step S2, the water ratio of described dewatered sludge is 30～50%.
According to an aspect of the present invention, provide a kind of above-mentioned application of mud integrated conduct method in processing organic solid castoff based on thermal hydrolysis.The organic solid castoff of this type includes but not limited to changing food waste, animal excrement and/or food-processing factory waste residue etc.
In the present invention, under the effect of heating power and pressure, the water holding of the solid matters such as the organic polymer structure in mud, colloid is destructurized, makes mud by the solid-state extremely strong liquid mud of mobility that is converted into of initial thickness.In addition, the high-temperature-hot-water solution is processed bacterium and the pathogenic agent that can thoroughly kill in mud, realizes the innoxious of mud.After thermal hydrolysis was processed, the water holding of mud was destructurized, being released in conjunction with water in mud, and dewatering is greatly improved, for follow-up processed creates favorable conditions; Simultaneously, the contained microorganism of mud is disintegrated, and the organic matter of microorganism cells fully discharges the one-step hydrolysis of going forward side by side, the dissolving of solid organic matters and hydrolysis in mud, the anaerobic digestion performance of mud is greatly improved, for follow-up Anaerobic Digestion creates favorable conditions.
In the present invention, adopt common filtering equipment to carry out mechanical dehydration; Adopt the embodiment of autoclave diaphragm pressure filter compared to existing technology, common filtering equipment can be saved equipment cost and the 20% above maintenance cost more than 30%.The resulting dehydrated sludge cake water ratio of this step is 30-50%, is rich in organism, therefore can be used as the fuel of steam boiler, or makes biomass fuel and sell outward, or sell outward as the organic fertilizer raw material.The resulting organic matter that removes after liquid is rich in hydrolysis of this step can make a large amount of biogas through anaerobic digestion, and the biogas of making can be used as the fuel of steam boiler, realize system's self heat balance, significantly reduce running cost, also can be for sale, create income.
Implement the present invention and can obtain following beneficial effect: (1) thermal hydrolysis treatment process of the present invention is applicable to the dewatered sludge of multiple water ratio, and need not before the thermal hydrolysis reaction, mud to be carried out any pre-treatment, and flow process is simple; (2) temperature that stops injecting saturation steam is reduced to 150～185 ℃, steam consumption reduces 10-30%, shortens 5-20 minute heat-up time, and the hold-time that stops injecting after saturation steam shortens 5-30 minute, processing efficiency improves more than 15%, and the relevant device investment reduces at least 15%; (3) after mechanical dehydration, the gained dehydrated sludge cake can be used as biomass fuel, remove liquid and can make biogas through anaerobic digestion, with above-mentioned both return to use as the fuel of boiler, not only can save the outsourcing energy cost fully, realize " with dirty pollution treatment ", reduce running cost, even can also have the energy more than needed to sell outward, create income; (4) integrated conduct method of the present invention is applicable to process other organic solid castoffs, has wide range of applications.
Description of drawings
Fig. 1 is the schema according to the mud integrated conduct method based on thermal hydrolysis of the present invention;
Fig. 2 is the schema based on the mud integrated conduct method of thermal hydrolysis according to the embodiment of the present invention 1;
Fig. 3 is the schema based on the mud integrated conduct method of thermal hydrolysis according to the embodiment of the present invention 2.
Embodiment
In order to make purpose of the present invention, technical scheme and advantage clearer, below in conjunction with the drawings and specific embodiments, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, is not intended to limit the present invention.
As shown in Figure 1, the invention provides a kind of mud integrated conduct method based on thermal hydrolysis, the mud that it is 75-90% to water ratio that the method adopts the saturation steam of 1.5-2.5MPa carries out thermal hydrolysis to be processed, the mud that hot-water cure is obtained carries out the dehydrated sludge cake that mechanical dehydration processing preparation can be used as biomass fuel, and the liquid that removes that adopts the mechanical dehydration process to obtain carries out the anaerobic digestion producing methane; Above-mentioned treatment step has not only been realized the minimizing of mud, has more realized the innoxious and resource utilization of mud.
Above-mentioned treating in the process that lignin-sludge heats, the present invention contact by mud and saturation steam (can be described as heating source) direct and mud between heat exchange realize heating.Those skilled in the art are understood that, are used as at present the reactor of sludge hot hydrolysis treatment mainly from its top injection saturation steam, and the minority reactor injects saturation steam from its top and bottom simultaneously.Front mud is thick, heat exchanging process is slow because thermal hydrolysis is processed, and in reactor, the mud of different zones does not wait apart from the position of heating source, and in heat-processed, the mud temperature of the interior different positions of reactor is not identical.
When using thermal hydrolysis treatment process provided by the present invention, at first vertically getting a little at inside reactor, by vertical third-class upper, middle, and lower part that is divided into, is namely top near 1/3 of top with reactor, be the bottom near 1/3 of bottom, 1/3 of centre is the middle part.When saturation steam injected from top, the bottom was cold zone; When injecting saturation steam simultaneously from the upper and lower, the middle part is cold zone.In other words, expression used herein " cold zone " means in reactor and therefore in heat-processed the zone at temperature relatively low mud place far away apart from heating source.
In a preferred embodiment of the invention, measure the temperature of mud in cold zone, and judge whether to need to continue to inject saturation steam take this temperature value as standard.The advantage of measuring the mud temperature at cold zone is: all the pending mud that can guarantee reactor all reach the essential temperature of carrying out the net heat hydrolysis treatment, shorten simultaneously the treatment time, reduce energy consumption and raise the efficiency.
Should be noted that the present invention preferably uses the reactor of prone configuration in order to improve rate of heating and therefore further to improve processing efficiency; In the type reaction unit, when using the saturation steam with equipressure, hot mass transfer speed is faster and efficient is higher, thereby in reactor, the thermal hydrolysis reaction of mud is also more rapid.Following specific embodiment also all launches to describe in detail in conjunction with horizontal reacting still (in an embodiment referred to as reactor).But the present invention is not limited to use the reaction unit of this structure, the distortion of the thermal hydrolysis reaction unit of any other structures of employing and be equal to replacement all within protection scope of the present invention.
Further describe the mud integrated conduct method based on thermal hydrolysis of the present invention below with reference to specific embodiment.
Embodiment 1:
As shown in Figure 2, the mud that is 75-80% with water ratio injects reactor, off-response still opening for feed, and start the interior whipping appts of reactor; Injected the saturation steam of 1.5-1.7MPa from steam boiler by reactor top in it, the mud in reactor is heated; The real time temperature of detection reaction still bottom mud when the mud temperature reaches 185 ℃, stops injecting saturation steam and kept 5-10 minute; Open subsequently pressure release valve and begin the steam discharge pressure release, open blow-off valve when the Pressure Drop in reactor is following to 0.05MPa, discharge thermal hydrolysis and process the mud that obtains; Enter pressure filter after mud is cooling and carry out mechanical dehydration, obtaining respectively removing liquid and water ratio is the dehydrated sludge cake of 45-50%; Remove liquid and further produce biogas through anaerobic digestion.Complete water ratio this moment is the comprehensive treating process of the mud of 75-80%, and prepared dehydrated sludge cake can be used as biomass fuel, and the biogas that produces is present known green energy resource.
Embodiment 2:
As shown in Figure 3, the mud that is 80-85% with water ratio injects reactor, off-response still opening for feed, and start the interior whipping appts of reactor; Injected the saturation steam of 1.8-2.0MPa from steam boiler by reactor top in it, the mud in reactor is heated; The real time temperature of detection reaction still bottom mud when the mud temperature reaches 170 ℃, stops injecting saturation steam and kept 15-20 minute; Open subsequently pressure release valve and begin the steam discharge pressure release, open blow-off valve when the Pressure Drop in reactor is following to 0.05MPa, discharge thermal hydrolysis and process the mud that obtains; Enter pressure filter after mud is cooling and carry out mechanical dehydration, obtaining respectively removing liquid and water ratio is the dehydrated sludge cake of 40-45%; Remove liquid and further produce biogas through the anaerobic digestion reaction, subsequently the biogas that produces is used for the heating steam boiler.Complete water ratio this moment is the comprehensive treating process of the mud of 80-85%, and prepared dehydrated sludge cake can be used as biomass fuel, and the biogas that produces reduces the outsourcing energy demand as the fuel of steam boiler, saves processing cost.
Embodiment 3:
The mud that is 85-90% with water ratio injects reactor, starts simultaneously the whipping appts in reactor, off-response still opening for feed; Injected simultaneously the saturation steam of 2.1-2.3MPa in it by the reactor upper and lower from steam boiler, the mud in reactor is heated; The real time temperature of detection reaction still middle part mud when the mud temperature reaches 165 ℃, stops injecting saturation steam and kept 0-5 minute; Open subsequently pressure release valve and begin the steam discharge pressure release, open blow-off valve when the Pressure Drop in reactor is following to 0.05MPa, discharge thermal hydrolysis and process the mud that obtains; Enter pressure filter after mud is cooling and carry out mechanical dehydration, obtaining respectively removing liquid and water ratio is the dehydrated sludge cake of 43-48%; Remove liquid and further enter anaerobic digestion equipment, and produce biogas through anaerobic digestion.Complete water ratio this moment is the comprehensive treating process of the mud of 85-90%, and prepared dehydrated sludge cake can be used as biomass fuel, and the biogas that produces is present known green energy resource.
Embodiment 4:
The mud that is 83-88% with water ratio injects reactor, off-response still opening for feed, and start the interior whipping appts of reactor; Injected the saturation steam of 2.2-2.5MPa from steam boiler by reactor top in it, the mud in reactor is heated; The real time temperature of detection reaction still bottom mud when the mud temperature reaches 160 ℃, stops injecting saturation steam and kept 5-12 minute; Open subsequently pressure release valve and begin the steam discharge pressure release, open blow-off valve when the Pressure Drop in reactor is following to 0.05MPa, discharge thermal hydrolysis and process the mud that obtains; Enter pressure filter after mud is cooling and carry out mechanical dehydration, obtaining respectively removing liquid and water ratio is the dehydrated sludge cake of 45-50%; Remove liquid and further produce biogas through the anaerobic digestion reaction, subsequently the biogas that produces is used for the heating steam boiler.Complete water ratio this moment is the comprehensive treating process of the mud of 83-88%, and prepared dehydrated sludge cake can be used as biomass fuel, and the biogas that produces reduces the outsourcing energy demand as the fuel of steam boiler, saves processing cost.
Embodiment 5:
The mud that is 80-85% with water ratio injects reactor, off-response still opening for feed, and start the interior whipping appts of reactor; Injected the saturation steam of 2.0-2.1MPa from steam boiler by reactor top in it, the mud in reactor is heated; The real time temperature of detection reaction still bottom mud when the mud temperature reaches 150 ℃, stops injecting saturation steam and kept 15-20 minute; Open subsequently pressure release valve and begin the steam discharge pressure release, open blow-off valve when the Pressure Drop in reactor is following to 0.05MPa, discharge thermal hydrolysis and process the mud that obtains; Enter pressure filter after mud is cooling and carry out mechanical dehydration, obtaining respectively removing liquid and water ratio is the dehydrated sludge cake of 30-35%; Remove liquid and further produce biogas through the anaerobic digestion reaction, subsequently the biogas that produces is used for the heating steam boiler.Complete water ratio this moment is the comprehensive treating process of the mud of 80-85%, and prepared dehydrated sludge cake can be used as biomass fuel, and the biogas that produces reduces the outsourcing energy demand as the fuel of steam boiler, saves processing cost.
By above embodiment 1-5 as can be known, the mud integrated conduct method based on thermal hydrolysis of the present invention has wide range of applications applicable to the mud (dewatered sludge) of multiple water ratio; And need not to treat lignin-sludge and carry out any pre-treatment before processing, not only save the treatment time, and be conducive to cost control.The temperature that stops injecting saturation steam is reduced to 150～185 ℃, can effectively shorten heat-up time, reduces energy consumption; The hold-time that stops injecting after saturation steam shortens, and has significantly improved processing efficiency, makes total operating cost reduce.Like this, can process more mud under equal energy consumption and time conditions, effectively promote total processing efficiency.Only need adopt common filtering equipment to carry out mechanical dehydration, significantly save equipment investment cost and maintenance cost.The dehydrated sludge cake that mud finally is converted into can be used as biomass fuel by method of the present invention and as the biogas of green energy resource as the fuel of steam boiler, reduces the outsourcing energy demand, saves processing cost.The minimizing of mud, innoxious and resource utilization have been realized.
Mud integrated conduct method based on thermal hydrolysis of the present invention can be applicable to process organic solid castoff, and the organic solid castoff of preferably treatment high-moisture percentage is more preferably processed the organic solid castoff that water ratio is 75-90%.The organic solid castoff of this type includes but not limited to changing food waste, animal excrement and/or food-processing factory waste residue etc.Below will describe by concrete example the application of this treatment process in detail, but it should be understood that following concrete example only is used for explaining the present invention, and scope of the present invention not consisted of any restriction.
Example 1:
The changing food waste that is 75-80% with water ratio injects reactor, off-response still opening for feed, and start the interior whipping appts of reactor; Injected the saturation steam of 1.5-1.7MPa from steam boiler by reactor top in it, the changing food waste in reactor is heated; The real time temperature of detection reaction still bottom changing food waste when the temperature of changing food waste reaches 185 ℃, stops injecting saturation steam and kept 20-25 minute; Open subsequently pressure release valve and begin the steam discharge pressure release, open blow-off valve when the Pressure Drop in reactor is following to 0.05MPa, discharge thermal hydrolysis and process the pulpous state changing food waste that obtains; Enter pressure filter after soup compound is cooling and carry out mechanical dehydration, obtaining respectively removing liquid and water ratio is the dewatered product of 45-50%; Remove liquid and further produce biogas through anaerobic digestion.Complete water ratio this moment is the comprehensive treating process of the changing food waste of 75-80%, and prepared dewatered product can be used as biomass fuel, and the biogas that produces is present known green energy resource.
Example 2:
Reactor is injected in the animal excrement that water ratio is 80-85%, off-response still opening for feed, and start the interior whipping appts of reactor; Injected the saturation steam of 1.8-2.0MPa from steam boiler by reactor top in it, the animal excrement in reactor are heated; The real time temperature of detection reaction still bottom animal excrement when the animal excrement temperature reaches 170 ℃, stops injecting saturation steam and kept 15-20 minute; Open subsequently pressure release valve and begin the steam discharge pressure release, open blow-off valve when the Pressure Drop in reactor is following to 0.05MPa, discharge thermal hydrolysis and process the pulpous state animal excrement that obtain; Enter pressure filter after soup compound is cooling and carry out mechanical dehydration, obtaining respectively removing liquid and water ratio is the dewatered product of 40-45%; Remove liquid and further produce biogas through the anaerobic digestion reaction, subsequently the biogas that produces is used for the heating steam boiler.Complete water ratio this moment is the comprehensive treating process of the animal excrement of 80-85%, and prepared dewatered product can be used as biomass fuel, and the biogas that produces reduces the outsourcing energy demand as the fuel of steam boiler, saves processing cost.
Example 3:
The food-processing factory waste residue that is 85-90% with water ratio injects reactor, starts simultaneously the whipping appts in reactor, off-response still opening for feed; Injected simultaneously the saturation steam of 2.1-2.3MPa in it by the reactor upper and lower from steam boiler, the food-processing factory waste residue in reactor is heated; The real time temperature of detection reaction still middle part food-processing factory waste residue when the temperature of food-processing factory waste residue reaches 165 ℃, stops injecting saturation steam and kept 10-15 minute; Open subsequently pressure release valve and begin the steam discharge pressure release, open blow-off valve when the Pressure Drop in reactor is following to 0.05MPa, discharge thermal hydrolysis and process the pasty food source mill waste residue that obtains; Enter pressure filter after soup compound is cooling and carry out mechanical dehydration, obtaining respectively removing liquid and water ratio is the dewatered product of 43-48%; Remove liquid and further enter anaerobic digestion equipment, and produce biogas through anaerobic digestion.Complete water ratio this moment is the comprehensive treating process of the food-processing factory waste residue of 85-90%, and prepared dewatered product can be used as biomass fuel, and the biogas that produces is present known green energy resource.
The above is only the preferred embodiments of the present invention, not in order to limiting the present invention, all any modifications of doing in the spirit and principles in the present invention, is equal to and replaces or improvement etc., all should be included in protection scope of the present invention.
Claims (9)
1. the mud integrated conduct method based on thermal hydrolysis, is characterized in that, said method comprising the steps of:
S1, thermal hydrolysis step: be that 75 ~ 90% mud injects reactor with water ratio, with injecting the saturation steam of 1.5-2.5MPa in backward reactor, when the temperature of mud reaches 150 ~ 185 ℃, stop injecting saturation steam and keep after 0 ~ 25 minute obtaining the mud of thermal hydrolysis;
S2, mechanical dehydration step: described mud is carried out mechanical dehydration, obtain removing liquid and dehydrated sludge cake;
S3, anaerobic digestion producing methane step: the described liquid that removes makes biogas through the anaerobic digestion reaction.
2. the mud integrated conduct method based on thermal hydrolysis according to claim 1, is characterized in that, described method also comprises:
S4, biogas recycling step: the biogas that makes in described step S3 is acted as a fuel to be returned to steam boiler and prepares saturation steam.
3. the mud integrated conduct method based on thermal hydrolysis according to claim 1 and 2, is characterized in that, the water ratio that injects mud in described step S1 in the reactor is 80 ~ 85%.
4. the mud integrated conduct method based on thermal hydrolysis according to claim 1 and 2, is characterized in that, in described step S1, injects the saturation steam of 1.8 ~ 2.3Mpa in the reactor.
5. the mud integrated conduct method based on thermal hydrolysis according to claim 1 and 2, is characterized in that, in described step S1, when the temperature of described mud reaches 160 ~ 170 ℃, stops injecting saturation steam and kept 10 ~ 15 minutes.
6. the mud integrated conduct method based on thermal hydrolysis according to claim 1 and 2, is characterized in that, whipping appts is equipped with in described reactor inside, and described step S1 also is included in to inject and starts described whipping appts after described mud and stir mud.
7. the mud integrated conduct method based on thermal hydrolysis according to claim 1 and 2, is characterized in that, and is further comprising the steps of between described step S1 and S2:
S11: the steam discharge pressure release is also discharged described mud; And
S12: make the described mud of discharge cooling.
8. the mud integrated conduct method based on thermal hydrolysis according to claim 1 and 2, is characterized in that, in described step S2, the water ratio of described dewatered sludge is 30 ~ 50%.
9. the application of mud integrated conduct method in processing organic solid castoff based on thermal hydrolysis of arbitrary claim in claim 1-8.
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103771679A (en) * | 2014-01-06 | 2014-05-07 | 浙江工业大学 | Synergetic treatment method of energy-saving dehydration and efficient heavy metal removal of sewage and sludge |
| CN105293854A (en) * | 2015-10-16 | 2016-02-03 | 深圳市环源科技发展有限公司 | Treatment system for organic solid waste |
| CN106755141A (en) * | 2016-12-21 | 2017-05-31 | 北京城市排水集团有限责任公司 | The method that pyrohydrolysis joint high temperature anaerobic acidifying improves acidogenesis of waste activated sludge amount |
| CN108002672A (en) * | 2016-10-28 | 2018-05-08 | 中国石油化工股份有限公司 | A kind of method handled using pyrohydrolysis pretreating process biochemical sludge |
| CN108862975A (en) * | 2018-09-20 | 2018-11-23 | 天津壹新环保工程有限公司 | Sludge anaerobic treatment method and system |
| CN110015828A (en) * | 2018-03-30 | 2019-07-16 | 长沙理工大学 | The two-stage anaerobic digestion processing method and processing system of activated sludge |
| CN110342769A (en) * | 2019-08-16 | 2019-10-18 | 深圳市环源科技发展有限公司 | A kind of energy-efficient sludge treatment equipment |
| CN110655298A (en) * | 2019-09-24 | 2020-01-07 | 清华大学深圳国际研究生院 | Method for treating sludge hydrolysate and recovering fungi thallus by using fungi |
| CN110902981A (en) * | 2018-09-10 | 2020-03-24 | 湖南军信环保股份有限公司 | Sludge treatment method |
| CN111646661A (en) * | 2020-05-25 | 2020-09-11 | 北京城市排水集团有限责任公司 | Energy recovery and fertilizer preparation process based on sludge pyrohydrolysis split-phase digestion |
| CN112094005A (en) * | 2020-09-08 | 2020-12-18 | 天津壹新环保工程有限公司 | Alkaline pyrohydrolysis treatment method and system for sludge |
| CN113769321A (en) * | 2021-01-19 | 2021-12-10 | 上海大学 | Degradation method of micro plastic in organic solid waste |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103771679A (en) * | 2014-01-06 | 2014-05-07 | 浙江工业大学 | Synergetic treatment method of energy-saving dehydration and efficient heavy metal removal of sewage and sludge |
| CN103771679B (en) * | 2014-01-06 | 2015-08-05 | 浙江工业大学 | A kind of sewage sludge energy-saving dewatering and heavy metal efficient removal cooperative processing method |
| CN105293854A (en) * | 2015-10-16 | 2016-02-03 | 深圳市环源科技发展有限公司 | Treatment system for organic solid waste |
| CN108002672A (en) * | 2016-10-28 | 2018-05-08 | 中国石油化工股份有限公司 | A kind of method handled using pyrohydrolysis pretreating process biochemical sludge |
| CN106755141A (en) * | 2016-12-21 | 2017-05-31 | 北京城市排水集团有限责任公司 | The method that pyrohydrolysis joint high temperature anaerobic acidifying improves acidogenesis of waste activated sludge amount |
| CN110015828A (en) * | 2018-03-30 | 2019-07-16 | 长沙理工大学 | The two-stage anaerobic digestion processing method and processing system of activated sludge |
| CN110902981A (en) * | 2018-09-10 | 2020-03-24 | 湖南军信环保股份有限公司 | Sludge treatment method |
| CN108862975A (en) * | 2018-09-20 | 2018-11-23 | 天津壹新环保工程有限公司 | Sludge anaerobic treatment method and system |
| CN110342769A (en) * | 2019-08-16 | 2019-10-18 | 深圳市环源科技发展有限公司 | A kind of energy-efficient sludge treatment equipment |
| CN110342769B (en) * | 2019-08-16 | 2024-03-12 | 深圳市环源科技发展有限公司 | Efficient and energy-saving sludge treatment device |
| CN110655298A (en) * | 2019-09-24 | 2020-01-07 | 清华大学深圳国际研究生院 | Method for treating sludge hydrolysate and recovering fungi thallus by using fungi |
| CN111646661A (en) * | 2020-05-25 | 2020-09-11 | 北京城市排水集团有限责任公司 | Energy recovery and fertilizer preparation process based on sludge pyrohydrolysis split-phase digestion |
| CN112094005A (en) * | 2020-09-08 | 2020-12-18 | 天津壹新环保工程有限公司 | Alkaline pyrohydrolysis treatment method and system for sludge |
| CN113769321A (en) * | 2021-01-19 | 2021-12-10 | 上海大学 | Degradation method of micro plastic in organic solid waste |
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