CN102515454A - Device and method for realizing thermal-hydrolysis fermentation treatment in rotation way - Google Patents
Device and method for realizing thermal-hydrolysis fermentation treatment in rotation way Download PDFInfo
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- CN102515454A CN102515454A CN2011104338776A CN201110433877A CN102515454A CN 102515454 A CN102515454 A CN 102515454A CN 2011104338776 A CN2011104338776 A CN 2011104338776A CN 201110433877 A CN201110433877 A CN 201110433877A CN 102515454 A CN102515454 A CN 102515454A
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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
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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Abstract
The invention provides a device and a method for realizing thermal-hydrolysis fermentation treatment in a rotation way. The device provided by the invention comprises a preheating unit, a rotary thermal-hydrolysis unit and a mixing fermentation unit. The method provided by the invention comprises the following steps that 1, an organic biomass raw material is preheated by flash-off steam in a preheating tank until a temperature of the organic biomass raw material is less than or equal to 105 DEG C, and then is orderly fed into all rotary thermal-hydrolysis reactors; 2, orderly through all the rotary thermal-hydrolysis reactors, the preheated organic biomass raw material is mixed with high pressure steam in a rotation way and is subjected to thermal hydrolysis; 3, organic biomass obtained by the thermal hydrolysis is subjected to flash evaporation in a flash evaporation tank; and 4, a digestive juice and the organic biomass subjected to flash evaporation are mixed and cooled and the cooled mixture is further cooled by a heat exchanger, wherein the organic biomass subjected to flash evaporation is digested by the digestive juice and produces biogas and slag. The device and the method provided by the invention have the characteristics of high heat exchange efficiency, short thermal-hydrolysis period and low energy consumption, and can be widely utilized for the field of organic biomass treatment.
Description
Technical field
The present invention relates to the thermal hydrolysis technology, particularly relate to a kind of apparatus and method that adopt rotation mode to realize the thermal hydrolysis fermentative processing.
Background technology
At present, about 1,400,000 tons of the annual sludge discharged dry weight of wastewater treatment in China factory, and annual to surpass 10% speed increment; And, contain objectionable impuritiess such as a large amount of heavy metals, pathogenic bacteria in the mud, bigger to the harm of environment; It is thus clear that the problem of environmental pollution that mud causes becomes increasingly conspicuous, for society has caused bigger potential safety hazard, environmental hazard and economical load.Thermal hydrolysis digestion process technology is a kind of treatment technology that mud is carried out minimizing, resource utilization, stabilization and safe.The thermal hydrolysis reactor drum is the core and the key equipment of mud thermal hydrolysis-anaerobic digester system, and it is not only determining the biogas effect of output, and is determining the energy consumption of whole sludge treatment equipment.Present stage, can reduce two kinds on the existing thermal hydrolysis overall reactor of China: a kind of is to adopt the autoclave of alr mode to comprise compositions such as reaction vessel, whisking appliance, transmission apparatus, cooling apparatus, safety equipment, process furnace; Another kind is that tubular type Continuous Heat hydrolysis reactor comprises apparatus for feeding, modified device, dehydration equipment, heat-exchange equipment, treating plant, adopts the catalyzer injection mode, adopts MP steam to the mud direct heating, and thermal hydrolysis under mesophilic condition.
This shows problem such as in the prior art, the heat exchange efficiency that thermal hydrolysis fermentative processing technology exists unit time or unit energy consumption is lower, the thermal hydrolysis cycle is long, energy consumption is bigger.
Summary of the invention
In view of this, main purpose of the present invention is to provide the apparatus and method of the employing rotation mode realization thermal hydrolysis fermentative processing that a kind of heat exchange efficiency is higher, the thermal hydrolysis cycle is short, energy-saving and cost-reducing.
In order to achieve the above object; Employing rotation mode of the present invention is realized the device of thermal hydrolysis fermentative processing; Comprise the preheating unit that adopts the unitary flash-off steam of spinning thermal hydrolysis that the organic-biological raw material of outside input is carried out preheating; The rotation thermal hydrolysis unit that carries out thermal hydrolysis, flash distillation successively after adopting HP steam that rotation mode makes outside input and the organic-biological raw material through preheating of preheating unit input mixing, organic-biological matter that is used for the process flash distillation is obtained and the mixed fermentation unit that lowers the temperature, digests and obtain biogas and thing slag after Digestive system mixes successively; Rotation thermal hydrolysis unit comprises the rotation thermal hydrolysis reactor drum that carries out thermal hydrolysis after one or more organic-biological raw material heat exchanges of adopting HP steam that rotation modes make outside input and the input of said preheating unit, the flash tank that being used for of one or more serial connections carried out flash distillation to the organic-biological matter that the process thermal hydrolysis obtains; Wherein, The material inlet of each rotation thermal hydrolysis reactor drum is all through the pipe connection material outlet of said preheating unit extremely; The HP steam inlet of each rotation thermal hydrolysis reactor drum is all extremely outside through pipe connection; Each rotation thermal hydrolysis reactor drum includes a pressure release steam inlet and a pressure release vapour outlet; The pressure release steam inlet of each rotation thermal hydrolysis reactor drum all passes through pipe connection with the pressure release vapour outlet that other rotate the thermal hydrolysis reactor drums; The pressure release vapour outlet of each rotation thermal hydrolysis reactor drum all passes through pipe connection with pressure release steam inlets that other rotate the thermal hydrolysis reactor drums, and the material outlet of each rotation thermal hydrolysis reactor drum is all through the material inlet of pipe connection to first flash tank of serial connection; In the flash tank of serial connection, the material outlet of previous flash tank connects the material inlet of a back flash tank, and the material outlet of last flash tank connects the unitary material inlet of said mixed fermentation; The flash-off steam outlet of each flash tank all enters the mouth through the flash-off steam of pipe connection to said preheating unit.
In order to achieve the above object, the present invention adopts rotation mode to realize that the method for thermal hydrolysis fermentative processing comprises the steps:
After step 1, the organic-biological raw material that adopts flash-off steam by preheating can the outside to be imported were preheated to and are less than or equal to 105 ℃, the thermal hydrolysis reactor drum was respectively rotated in input successively.
The pressure release steam that step 2, the rotation thermal hydrolysis reactor drum of just having accomplished thermal hydrolysis produce thermal hydrolysis exports the rotation thermal hydrolysis reactor drum of the organic-biological raw material of positive input preheating to; After each rotates the thermal hydrolysis reactor drum and accomplishes charging, carry out thermal hydrolysis after adopting rotation mode will pass through the organic-biological raw material of preheating and HP steam from the outside mixes successively.
Step 3, the organic-biological matter that is obtained after to thermal hydrolysis by flash tank are carried out flash distillation; If the pressure of the flash-off steam that flash distillation produces is less than the internal pressure of preheating can, then by squirt pump with the exert pressure of flash-off steam to internal pressure greater than preheating can, the flash-off steam after the pressurization is returned step 1; If the pressure of the flash-off steam that flash distillation produces then directly returns flash-off steam to step 1 greater than the internal pressure of preheating can; To the organic-biological matter through flash distillation, performing step 4.
Behind the hybrid cooling of the organic-biological matter of step 4, Digestive system and process flash distillation, obtain the mixture of lowering the temperature; Adopt heat exchanger that the cooling mixture is further lowered the temperature, afterwards, digest by the Digestive system pair organic-biological matter that mixes with it, and export biogas and the thing slag that digestion obtains to outside respectively.
Digestive system described in the step 4 is through the fermentation materials behind the anaerobically fermenting in the digester.
In sum; Employing rotation mode according to the invention is realized in the apparatus and method of thermal hydrolysis fermentative processing; Preheating unit carries out preheating to the organic-biological raw material of outside input; And adopt inner rotation mode to make the organic-biological raw material of preheating and HP steam fully carry out heat exchange by rotation thermal hydrolysis unit, and make the organic-biological raw material further heat, accelerated pyrohydrolysis process; Therefore, the heat exchanger effectiveness of apparatus of the present invention and method is higher and the thermal hydrolysis cycle is shorter.In addition, apparatus of the present invention and method utilize the flash-off steam that produces in the pyrohydrolysis process that the organic-biological raw material of outside input is heated, and since the thermal hydrolysis cycle shorter, so apparatus of the present invention and method also have energy-saving and cost-reducing characteristics.
Description of drawings
Fig. 1 is the composition structural representation that employing rotation mode according to the invention is realized the device of thermal hydrolysis fermentative processing.
Fig. 2 is the unitary composition structural representation of rotation thermal hydrolysis according to the invention.
Fig. 3 is the composition structural representation of rotation thermal hydrolysis reactor drum according to the invention.
Fig. 4 is the composition structural representation of preheating unit according to the invention.
Fig. 5 is the unitary composition structural representation of mixed fermentation according to the invention.
Fig. 6 is the schema of thermal hydrolysis fermentation processing method according to the invention.
Fig. 7 is the composition structural representation that employing rotation mode according to the invention is realized the apparatus and method embodiment of thermal hydrolysis fermentative processing.
Embodiment
For making the object of the invention, technical scheme and advantage clearer, will combine accompanying drawing and specific embodiment that the present invention is done to describe in detail further below.
Fig. 1 is the composition structural representation that employing rotation mode according to the invention is realized the device of thermal hydrolysis fermentative processing.As shown in Figure 1; Employing rotation mode according to the invention realizes that the device of thermal hydrolysis fermentative processing comprises the preheating unit 1 that the flash-off steam that adopts spinning thermal hydrolysis unit 2 carries out preheating to the organic-biological raw material of outside input; The rotation thermal hydrolysis unit 2 that carries out thermal hydrolysis, flash distillation successively after adopting HP steam that rotation mode makes outside input and the organic-biological raw material through preheating of preheating unit 1 input mixing, organic-biological matter that is used for the process flash distillation is obtained and the mixed fermentation unit 3 that lowers the temperature, digests and obtain biogas and thing slag after Digestive system mixes successively; Wherein, The material inlet of preheating unit 1 is connected to the outside; The flash-off steam inlet of preheating unit 1 connects the flash-off steam delivery port of rotation thermal hydrolysis unit 2; The material outlet of preheating unit 1 connects the material inlet of rotation thermal hydrolysis unit 2, and the HP steam import of rotation thermal hydrolysis unit 2 is connected with the peripheral equipment of carrying HP steam, and the material outlet of rotation thermal hydrolysis unit 2 connects the material inlet of mixed fermentation unit 3; The methane outlet of mixed fermentation unit 3 and the outlet of thing slag are connected to the outside respectively, and the mixed fermentation unit also is provided with an entrance of cooling water and a cooling water outlet.
Fig. 2 is the unitary composition structural representation of rotation thermal hydrolysis according to the invention.As shown in Figure 2; Rotation thermal hydrolysis unit 2 comprise the rotation thermal hydrolysis reactor drum 211 that carries out thermal hydrolysis after one or more organic-biological raw material heat exchanges of adopting HP steam that rotation modes make outside input and preheating unit 1 to import ..., 21i ..., 21n, one or more serial connections be used for to the organic-biological matter that obtains through thermal hydrolysis carry out flash distillation flash tank 221,222 ..., 22m; Wherein, M, n, i are the natural number more than or equal to 1; And 1≤i≤n; The material inlet of arbitrary rotation thermal hydrolysis reactor drum 21i is the material outlet through pipe connection to preheating unit 1 all; The HP steam inlet of arbitrary rotation thermal hydrolysis reactor drum 21i is all extremely outside through pipe connection, and arbitrary rotation thermal hydrolysis reactor drum 21i includes a pressure release steam inlet and a pressure release vapour outlet, and the pressure release steam inlet of arbitrary rotation thermal hydrolysis reactor drum 21i all passes through pipe connection with the pressure release vapour outlet that other rotate the thermal hydrolysis reactor drums; The pressure release vapour outlet of arbitrary rotation thermal hydrolysis reactor drum 21i all passes through pipe connection with pressure release steam inlets that other rotate the thermal hydrolysis reactor drums, and the material outlet of arbitrary rotation thermal hydrolysis reactor drum 21i is all through the material inlet of pipe connection to first flash tank 221 of serial connection; In the flash tank of serial connection, the material outlet of previous flash tank connects the material inlet of a back flash tank, and the material outlet of last flash tank 22m connects the material inlet of mixed fermentation unit 3; The flash-off steam outlet of each flash tank 221 ~ 22m all enters the mouth through the flash-off steam of pipe connection to preheating unit 1.
In the practical application; The organic-biological raw material that preheating unit 1 will pass through preheating is imported successively and is respectively rotated thermal hydrolysis reactor drum 211 ~ 21n in the rotation thermal hydrolysis unit 2, that is, preheating unit 1 is at first to first rotation thermal hydrolysis reactor drum 211 chargings; After first rotation thermal hydrolysis reactor drum 211 chargings are accomplished; To second rotation thermal hydrolysis reactor drum 212 ..., and the like; Accomplish charging until n rotation thermal hydrolysis reactor drum 21n; Therefore, many rotation thermal hydrolysis reactor drum 211 ~ 21n can realize the Continuous Heat hydrolysis to organic-biological matter, and the device of employing rotation mode realization thermal hydrolysis fermentative processing according to the invention like this can be handled more a large amount of organic-biological raw materials.
In the practical application; Each rotates thermal hydrolysis reactor drum 211 ~ 21n and when the organic-biological raw material carries out thermal hydrolysis, needn't rotate continuously; Only need in HP steam and organic-biological raw material through preheating carry out the process of heat exchange, to rotate; Impel the organic-biological raw material thorough mixing of HP steam and process preheating, accelerate the thermal hydrolysis of organic-biological raw material.
In the practical application; Pressure according to the different steps of rotating thermal hydrolysis reactor drum thermal hydrolysis is different; At thermal hydrolysis in the cycle; The rotation thermal hydrolysis reactor drum of having accomplished thermal hydrolysis does not need higher pressure, and for making full use of the energy that produces in the pyrohydrolysis process, the rotation thermal hydrolysis reactor drum of having accomplished thermal hydrolysis is also to just discharging pressure release steam at the rotation thermal hydrolysis reactor drum of charging; Reduce the thermosteresis that pressure release steam produces in pipeline is carried, just can reduce simultaneously at the rotation thermal hydrolysis reactor drum of charging consumption to HP steam.
In the practical application; The flash-off steam hypotony that each flash tank 221 ~ 22m discharges; Make when flash-off steam can't be advanced into preheating unit 1 certainly that can adopt injector or vapour compressor to be forced into needs pressure, such as; Adopt water-steam injector, steam-steam injector etc., get into preheating unit 1 to guarantee flash-off steam.
In the practical application, the internal pressure of each flash tank 221 ~ 22m is a little more than normal pressure.
In a word, employing rotation mode according to the invention is realized in the device of thermal hydrolysis fermentative processing, after the organic-biological raw material that preheating unit is imported the outside carries out preheating, gets into rotation thermal hydrolysis unit; Rotation thermal hydrolysis reactor drum in the rotation thermal hydrolysis unit adopts rotation mode to make the organic-biological raw material of preheating and HP steam fully carry out heat exchange; Make the organic-biological raw material further heat; Accelerated pyrohydrolysis process, the macrobead organic-biological is by degraded fast; Therefore, the heat exchanger effectiveness of apparatus of the present invention is higher and the thermal hydrolysis cycle is shorter, and compared with prior art, under organic-biological matter situation identical in quality, the thermal hydrolysis cycle can shorten 1/3 ~ 1/2.In addition; Apparatus of the present invention are under the situation of works better; The flash-off steam that each flash tank produces is used for the organic-biological raw material of the outside input of preheating, and the pressure release steam of just having accomplished a rotation thermal hydrolysis reactor drum generation of thermal hydrolysis is exported to the rotation thermal hydrolysis reactor drum of positive charging, and apparatus of the present invention have made full use of the energy that produces in the pyrohydrolysis process; Therefore, apparatus of the present invention also have the power consumption features of smaller.
Fig. 3 is the composition structural representation of rotation thermal hydrolysis reactor drum according to the invention.As shown in Figure 3, each rotation thermal hydrolysis reactor drum 2i comprise revolving reaction jar 2i1, feed-pipe 2i2, feed valve 2i3, the one or more first guiding tube 2i4,, pressure release steam inlet pipe 2i5, pressure release steam inlet valve 2i6, extraction line 2i7, the first bleeder valve 2i8, the second bleeder valve 2i9, HP steam inlet pipe 2i10, HP steam inlet valve 2i11, the one or more second guiding tube 2i12, pressure release steam outlet pipe 2i13, pressure release steam outlet valve 2i14; Wherein, The feed-pipe 2i2 of revolving reaction jar 2i1 will be installed in said revolving reaction jar 2i1 opening for feed through feed valve 2i3 the first guiding tube 2i4 is communicated with the discharge port of preheating unit 1; Pressure release steam inlet pipe 2i5 is communicated with the first guiding tube 2i4 through pressure release steam inlet valve 2i6, and extraction line 2i7 is communicated with the first guiding tube 2i4 through the first discharging valve 2i8, the second discharging valve 2i9 successively; The HP steam inlet pipe 2i10 of revolving reaction jar 2i1 will be installed in the import of said revolving reaction jar 2i1 HP steam through HP steam inlet valve 2i11 the second guiding tube 2i12 is communicated with the peripheral equipment of output HP steam, and pressure release steam outlet pipe 2i13 is communicated with the second guiding tube 2i12 through pressure release steam outlet valve 2i14.
In the practical application; Rotation thermal hydrolysis reactor drum 2i carries out thermal hydrolysis; Open the feed valve 2i3 of revolving reaction jar 2i1, close HP steam inlet valve 2i11, pressure release steam outlet valve 2i14, pressure release steam inlet valve 2i6, the first bleeder valve 2i8, the second bleeder valve 2i9 simultaneously, feed-pipe 2i2 begins by preheating unit 1 charging; Organic-biological raw material stream gets into revolving reaction jar 2i1 through the first guiding tube 2i4; After the organic-biological raw material integrated flow of input reached preset value, feed valve 2i3 closed, and accomplished charging.Simultaneously or lag behind for some time, open the pressure release steam valve inlet valve 2i6 of revolving reaction jar 2i1; Open the pressure release steam outlet valve that another has just accomplished the rotation thermal hydrolysis reactor drum of thermal hydrolysis; When another internal pressure of rotation thermal hydrolysis reactor drum of just having accomplished thermal hydrolysis during less than preset pressure 0.1MPa ~ 0.5MPa, close this another just accomplished the pressure release steam outlet valve of the rotation thermal hydrolysis reactor drum of thermal hydrolysis.Postpone certain hour; Open HP steam inlet valve 2i11; External high pressure steam is got into by HP steam inlet pipe 2i10, and revolving reaction jar 2i1 rotation is with the carrying out of impelling heat exchange and accelerate pyrohydrolysis process, when revolving reaction jar 2i1 internal pressure reaches 0.5MPa ~ 1.0MPa and inner organic-biological raw material and is in the non-boiling state; Close HP steam inlet valve 2i11, and revolving reaction jar 2i1 was kept this state 15-90 minute; After 15-90 minute; Open the pressure release steam outlet valve 2i14 of rotation thermal hydrolysis reactor drum 2i; 2i just discharges pressure release steam at the rotation thermal hydrolysis reactor drum of charging to another by rotation thermal hydrolysis reactor drum; When the revolving reaction jar 2i1 internal pressure of rotation thermal hydrolysis reactor drum 2i is reduced to 0.1MPa ~ 0.7MPa, close pressure release steam outlet valve 2i14.After pressure release steam outlet valve 2i14 closes; The first guiding tube 2i4 is threaded to revolving reaction jar 2i1 bottom; And the Time Delay Opening first bleeder valve 2i8, the second bleeder valve 2i9, export the organic-biological matter that obtains after the thermal hydrolysis reaction to first flash tank 221 through extraction line 2i7.Discharging is closed the first bleeder valve 2i8, the second bleeder valve 2i9 after accomplishing, and rotation thermal hydrolysis reactor drum 2i accomplishes a thermal hydrolysis circulation.
In the practical application, revolving reaction jar 2i1 is rotated under the driving of motor or other PWR PLT, and power consumption is less; Such as, when revolving reaction jar 2i1 drove 25 ~ 30 tons of organic-biological matter, the consumed power of motor was 5 ~ 7.5kW; Revolving reaction jar 2i1 rotational time accounts for 1/4 ~ 1/5 of the whole thermal hydrolysis cycle, and the organic-biological matter thermal hydrolysis power consumption of unit mass is 0.05-0.0625kW/t.
In the practical application, during rotation thermal hydrolysis reactor drum 2i discharging, the internal pressure of rotation thermal hydrolysis reactor drum 2i is bigger greater than the internal pressure and the pressure reduction of first flash tank 221, makes and rotates the whole emptyings of organic-biological matter that thermal hydrolysis reactor drum 2i thermal hydrolysis obtains.
In the practical application, revolving reaction jar 2i1 carries out horizontal direction rotation or vertical direction rotation or oblique rotation.
Fig. 4 is the composition structural representation of preheating unit according to the invention.As shown in Figure 4, preheating unit 1 comprises the preheating can 11 through the organic-biological raw material of preheating that is used for successively reclaiming through the organic-biological raw material of preheating, when respectively rotating thermal hydrolysis reactor drum 211 ~ 21n and all carry out thermal hydrolysis to each said rotation thermal hydrolysis reactor drum 211 ~ 21n output preheating unit 1 output; Wherein, The material inlet of preheating can 11 is connected to the outside; The flash-off steam inlet of preheating can 11 is communicated with the flash-off steam outlet of each flash tank 221 ~ 22m through pipeline, and the material outlet of preheating can 11 is connected to the material inlet that respectively rotates thermal hydrolysis reactor drum 211 ~ 21n through the 3rd bleeder valve; Preheating can 11 also is provided with a feed back inlet, and this feed back inlet is connected to the material outlet of preheating can 11 through material returning valve.
In the practical application; The organic-biological raw material that preheating can 11 employings are imported the outside from the flash-off steam of each flash tank 221 ~ 22m is heated to and is less than or equal to 105 ° of C, and the organic-biological raw material of preheating is squeezed into each rotation thermal hydrolysis reactor drum 211 ~ 21n successively by pump.
Fig. 5 is the unitary composition structural representation of mixed fermentation according to the invention.As shown in Figure 5; Mixed fermentation unit 3 comprises that the mixture of the Digestive system that is used for rotation thermal hydrolysis unit 2 output organic-biological matter and digester 32 are exported carries out refrigerative interchanger 31 through externally cooled water, the digester 32 that cooled organic-biological matter is digested by Digestive system; Wherein, The material inlet of interchanger 31 simultaneously with; The Digestive system outlet of the material outlet of the flash tank in back, digester 32 is communicated with, and the material outlet of interchanger 31 is connected with the material inlet of digester 32, and the methane outlet of digester 32, the outlet of thing slag are connected to the outside respectively.
In the practical application, the water coolant through heat exchange in the interchanger 31 can be used for the demand of the device of said employing rotation mode realization thermal hydrolysis fermentative processing to low-temperature water heating, such as, can be used for importing in the preheating can 11 with dilution organic-biological raw material.
Among the present invention, the organic-biological matter of last flash tank 22m output of rotation thermal hydrolysis unit 2 is mixed in pipeline through the Digestive system of topping-up pump with digester 32 outputs.Organic-biological matter is with before Digestive system mixes, and the temperature of Digestive system is 35-60 ° of C; Organic-biological matter is with after Digestive system mixes, and the temperature of the cooling mixture that obtains is 35-90 ° of C.The blending ratio value of the organic-biological matter of Digestive system and process flash distillation is more than or equal to 1.
In the practical application,, further,, destroy the bacterial activity in the Digestive system to avoid organic-biological matter self-temperature too high through interchanger 31 coolings through after the organic-biological matter and Digestive system hybrid cooling of flash distillation.Through after the organic-biological matter and Digestive system hybrid cooling of flash distillation, if the temperature of cooling mixture is lower than established standards, the mixture of then lowering the temperature does not need further heat exchange, digests but directly get into digester 32.
In apparatus of the present invention, said Digestive system digests cooled organic-biological matter and is anaerobically fermenting.
Fig. 6 is the schema that employing rotation mode according to the invention is realized the method for thermal hydrolysis fermentative processing.As shown in Figure 6, employing rotation mode according to the invention realizes that the method for thermal hydrolysis fermentative processing comprises the steps:
After step 1, the organic-biological raw material that adopts flash-off steam by preheating can the outside to be imported were preheated to and are less than or equal to 105 ℃, the thermal hydrolysis reactor drum was respectively rotated in input successively.
The pressure release steam that step 2, the rotation thermal hydrolysis reactor drum of just having accomplished thermal hydrolysis produce thermal hydrolysis exports the rotation thermal hydrolysis reactor drum of the organic-biological raw material of positive input preheating to; After each rotates the thermal hydrolysis reactor drum and accomplishes charging, carry out thermal hydrolysis after adopting rotation mode will pass through the organic-biological raw material of preheating and HP steam from the outside mixes successively.
Step 3, the organic-biological matter that is obtained after to thermal hydrolysis by flash tank are carried out flash distillation; If the pressure of the flash-off steam that flash distillation produces is less than the internal pressure of preheating can, then by squirt pump with the exert pressure of flash-off steam to internal pressure greater than preheating can, the flash-off steam after the pressurization is returned step 1; If the pressure of the flash-off steam that flash distillation produces then directly returns flash-off steam to step 1 greater than the internal pressure of preheating can; To the organic-biological matter through flash distillation, performing step 4.
After step 4, process the organic-biological matter and Digestive system hybrid cooling of flash distillation, obtain the mixture of lowering the temperature; Adopt heat exchanger that the cooling mixture is further lowered the temperature, afterwards, digest by the Digestive system pair organic-biological matter that mixes with it, and export biogas and the thing slag that digestion obtains to outside respectively.
In the inventive method, organic-biological matter is with before Digestive system mixes, and the temperature of Digestive system is 35-60 ° of C; Organic-biological matter is with after Digestive system mixes, and the temperature of cooling mixture is 35-90 ° of C.The Digestive system of process flash distillation and the mixing quality ratio value of organic-biological matter are more than or equal to 1.
In the practical application,,,, destroy the bacterial activity in the Digestive system to avoid organic-biological matter self-temperature too high further through the interchanger cooling through after the organic-biological matter and Digestive system hybrid cooling of flash distillation.Through after the organic-biological matter and Digestive system hybrid cooling of flash distillation, if the temperature of cooling mixture is lower than established standards, the mixture of then lowering the temperature does not need further heat exchange, but directly digests.
In a word, employing rotation mode according to the invention is realized in the method for thermal hydrolysis fermentative processing, the organic-biological raw material preheating that the pressure release steam that preheating can adopts the present invention in pyrohydrolysis process, to produce is imported the outside; Rotation thermal hydrolysis device adopts rotation mode to make the organic-biological raw material of preheating and HP steam fully carry out heat exchange, makes the organic-biological raw material further heat, and has accelerated pyrohydrolysis process, and the macrobead organic-biological is by degraded fast; Therefore, the heat exchanger effectiveness of the inventive method is higher and the thermal hydrolysis cycle is shorter, and compared with prior art, under the organic-biological situation identical in quality, the thermal hydrolysis cycle can shorten 1/3 ~ 1/2; Simultaneously, the inventive method has energy-saving and cost-reducing characteristics.
In the step 2; The organic-biological raw material of said process preheating is mixed into the HP steam from the outside: HP steam carries out heat exchange with the organic-biological raw material of process preheating, makes the organic-biological matter that obtains after the heat exchange be heated to 0.5Mpa ~ 1.0Mpa and be in the non-boiling state.
In the practical application, the said time length that makes the organic-biological matter that obtains after the heat exchange be heated to 0.5Mpa ~ 1.0Mpa and be in the non-boiling state is 15 ~ 90 minutes.
In the practical application,, adopt the different thermal hydrolysis time length according to different organic-biological raw materials.
Embodiment
Fig. 7 is the composition structural representation that employing rotation mode according to the invention is realized the apparatus and method embodiment of thermal hydrolysis fermentative processing.As shown in Figure 7, the said employing rotation mode of present embodiment realizes that the device of thermal hydrolysis fermentative processing comprises preheating can, rotation thermal hydrolysis reactor drum a, rotation thermal hydrolysis reactor drum b, a flash tank, an interchanger and a digester.Organic-biological raw material in the present embodiment is a mud, such as, municipal sludge.The said employing rotation mode of present embodiment is realized the method such as the above-mentioned content of thermal hydrolysis fermentative processing.
In sum, more than being merely preferred embodiment of the present invention, is not to be used to limit protection scope of the present invention.All within spirit of the present invention and principle, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (9)
1. device that adopts rotation mode to realize the thermal hydrolysis fermentative processing; It is characterized in that; The device of said thermal hydrolysis fermentative processing comprises the preheating unit that adopts the unitary flash-off steam of spinning thermal hydrolysis that the organic-biological raw material of outside input is carried out preheating; The rotation thermal hydrolysis unit that carries out thermal hydrolysis, flash distillation successively after adopting HP steam that rotation mode makes outside input and the organic-biological raw material through preheating of preheating unit input mixing, organic-biological matter that is used for the process flash distillation is obtained and the mixed fermentation unit that lowers the temperature, digests and obtain biogas and thing slag after Digestive system mixes successively; Rotation thermal hydrolysis unit comprises the rotation thermal hydrolysis reactor drum that carries out thermal hydrolysis after one or more organic-biological raw material heat exchanges of adopting HP steam that rotation modes make outside input and the input of said preheating unit, the flash tank that being used for of one or more serial connections carried out flash distillation to the organic-biological matter that the process thermal hydrolysis obtains; Wherein,
The material inlet of each rotation thermal hydrolysis reactor drum is all through the pipe connection material outlet of said preheating unit extremely; The HP steam inlet of each rotation thermal hydrolysis reactor drum is all extremely outside through pipe connection; Each rotation thermal hydrolysis reactor drum includes a pressure release steam inlet and a pressure release vapour outlet; The pressure release steam inlet of each rotation thermal hydrolysis reactor drum all passes through pipe connection with the pressure release vapour outlet that other rotate the thermal hydrolysis reactor drums; The pressure release vapour outlet of each rotation thermal hydrolysis reactor drum all passes through pipe connection with pressure release steam inlets that other rotate the thermal hydrolysis reactor drums, and the material outlet of each rotation thermal hydrolysis reactor drum is all through the material inlet of pipe connection to first flash tank of serial connection; In the flash tank of serial connection, the material outlet of previous flash tank connects the material inlet of a back flash tank, and the material outlet of last flash tank connects the unitary material inlet of said mixed fermentation; The flash-off steam outlet of each flash tank all enters the mouth through the flash-off steam of pipe connection to said preheating unit.
2. employing rotation mode according to claim 1 is realized the device of thermal hydrolysis fermentative processing; It is characterized in that each said rotation thermal hydrolysis reactor drum comprises revolving reaction jar, feed-pipe, feed valve, one or more first guiding tube, pressure release steam inlet pipe, pressure release steam inlet valve, extraction line, first bleeder valve, second bleeder valve, HP steam inlet pipe, HP steam inlet valve, one or more second guiding tube, pressure release steam outlet pipe, pressure release steam outlet valve; Wherein,
The feed-pipe of revolving reaction jar will be installed in said revolving reaction jar opening for feed through feed valve first guiding tube is communicated with the discharge port of said preheating unit; Pressure release steam inlet pipe is communicated with first guiding tube through pressure release steam inlet valve, and extraction line is communicated with first guiding tube through the first discharging valve, the second discharging valve successively; The HP steam inlet pipe of revolving reaction jar will be installed in the import of said revolving reaction jar HP steam through the HP steam inlet valve second guiding tube is communicated with the peripheral equipment of output HP steam, and the pressure release steam outlet pipe is communicated with second guiding tube through the pressure release steam outlet valve.
3. employing rotation mode according to claim 2 is realized the device of thermal hydrolysis fermentative processing, it is characterized in that, said revolving reaction jar carries out horizontal direction rotation or vertical direction rotation or oblique rotation.
4. employing rotation mode according to claim 1 is realized the device of thermal hydrolysis fermentative processing; It is characterized in that said preheating unit comprises and is used for exporting organic-biological raw material, each said rotation thermal hydrolysis reactor drum of passing through preheating reclaim the organic-biological raw material that passes through preheating of said preheating unit output when all carrying out thermal hydrolysis preheating can to each said rotation thermal hydrolysis reactor drum successively; Wherein,
The material inlet of preheating can is connected to the outside, and the flash-off steam inlet of preheating can is communicated with the flash-off steam outlet of each said flash tank through pipeline, and the material outlet of preheating can is connected to the material inlet of each said rotation thermal hydrolysis reactor drum through the 3rd bleeder valve; Preheating can also is provided with a feed back inlet, and this feed back inlet is connected to the material outlet of said preheating can through material returning valve.
5. employing rotation mode according to claim 1 is realized the device of thermal hydrolysis fermentative processing; It is characterized in that; Said mixed fermentation unit comprises that the mixture of the Digestive system that is used for said rotation thermal hydrolysis unit output organic-biological matter and digester 32 are exported carries out the refrigerative interchanger through externally cooled water, the digester that cooled organic-biological matter is digested by Digestive system; Wherein,
The material inlet of interchanger is communicated with the material outlet of said last flash tank, the Digestive system outlet of digester simultaneously, and the material outlet of interchanger is connected with the material inlet of digester, and the methane outlet of digester, the outlet of thing slag are connected to the outside respectively.
6. a method that adopts rotation mode to realize the thermal hydrolysis fermentative processing is characterized in that said thermal hydrolysis fermentation processing method comprises the steps:
After step 1, the organic-biological raw material that adopts flash-off steam by preheating can the outside to be imported were preheated to and are less than or equal to 105 ℃, the thermal hydrolysis reactor drum was respectively rotated in input successively;
The pressure release steam that step 2, the rotation thermal hydrolysis reactor drum of just having accomplished thermal hydrolysis produce thermal hydrolysis exports the rotation thermal hydrolysis reactor drum of the organic-biological raw material of positive input preheating to; After each rotates the thermal hydrolysis reactor drum and accomplishes charging, carry out thermal hydrolysis after adopting rotation mode will pass through the organic-biological raw material of preheating and HP steam from the outside mixes successively;
Step 3, the organic-biological matter that is obtained after to thermal hydrolysis by flash tank are carried out flash distillation; If the pressure of the flash-off steam that flash distillation produces is less than the internal pressure of preheating can, then by squirt pump with the exert pressure of flash-off steam to internal pressure greater than preheating can, the flash-off steam after the pressurization is returned step 1; If the pressure of the flash-off steam that flash distillation produces then directly returns flash-off steam to step 1 greater than the internal pressure of preheating can; To the organic-biological matter through flash distillation, performing step 4;
After step 4, process the organic-biological matter and Digestive system hybrid cooling of flash distillation, obtain the mixture of lowering the temperature; Adopt heat exchanger that the cooling mixture is further lowered the temperature, afterwards, digest by the Digestive system pair organic-biological matter that mixes with it, and export biogas and the thing slag that digestion obtains to outside respectively.
7. employing rotation mode according to claim 6 is realized the method for thermal hydrolysis fermentative processing; It is characterized in that; In the step 2; The organic-biological raw material of said process preheating is mixed into the HP steam from the outside: HP steam carries out heat exchange with the organic-biological raw material of process preheating, makes the organic-biological matter that obtains after the heat exchange be heated to 0.5Mpa ~ 1.0Mpa and be in the non-boiling state.
8. employing rotation mode according to claim 7 is realized the method for thermal hydrolysis fermentative processing, it is characterized in that, the said time length that makes the organic-biological matter that obtains after the heat exchange be heated to 0.5Mpa ~ 1.0Mpa and be in the non-boiling state is 15 ~ 90 minutes.
9. employing rotation mode according to claim 7 is realized the method for thermal hydrolysis fermentative processing, it is characterized in that the mixing quality ratio value of Digestive system and organic-biological matter is more than or equal to 1 in the step 4.
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