CN104109632B - A kind of large-scale outer driving Integral horizontal type rotates continuous biogas dry fermentation device and method - Google Patents

Abstract

A kind of large-scale outer driving Integral horizontal type rotates continuous biogas dry fermentation device and method, belongs to dry fermentation technical field。Adopting and built-in be fixed on fermentation cabin inwall, run through the principal screw wing and the parts transversely fin in whole fermentation cabin, when tank body rotates, built-in fin rotates with tank body, in order to realize fermentation materials stirring and overall to the propelling of discharging opening。Main rotor flight is fixed by interval fixing point with inner tank wall, and helical wing plate is with forming certain gap between inner tank wall, it is ensured that mixing of materials, inoculation and fermentation and discharge。Present invention achieves the not batch mixing of whole course of reaction, make fermentation more thorough。

Description

A large-scale external drive overall horizontal rotary continuous biogas dry fermentation device and method

technical field

The invention belongs to the technical field of dry fermentation, and in particular relates to a large externally driven integral horizontal rotary continuous biogas dry fermentation device and method.

Background technique

"National Medium and Long-Term Science and Technology Development Plan (2006-2020)" focuses on the urgent needs of building a resource-saving and environment-friendly society in response to the outstanding problems that restrict sustainable development such as resource shortages, single energy structures, and environmental degradation in my country , proposed to vigorously strengthen the development and integrated application of a series of technologies such as the combination of clean energy production and environmental protection, to enhance the support and leadership of science and technology for sustainable development, and to cultivate and develop strategies such as clean energy production, resource recycling, and environmental pollution control As one of the overall arrangements for the development of science and technology in my country in the future, strengthening technology research and development, integrated application and industrialization demonstration is one of the overall plans for the development of science and technology. Part of the core content is the efficient use of biomass resources and the effective control of pollution caused by these substances. The technological improvement and large-scale realization of the biomass new energy industry require the development of advanced and efficient bio-fermentation technology, as well as the development of large-scale biogas fermentation equipment around the core fermentation technology.

Dry anaerobic fermentation usually means that the dry matter content of the fermentation raw material is 20% to 40%, the raw material is solid or semi-solid, the fermentation biogas slurry sewage is produced during the treatment process, and the fermentation residue can be made into organic fertilizer, which basically realizes Zero pollutant emission, dry fermentation with high methane content (60%) and low sulfur content.

Traditional biogas fermentation has the following problems: 1) Biogas fermentation cannot truly achieve continuous production, and most large-scale devices can only use intermittent; 2) Large-scale dry-type fermentation bins are bulky, with high dry matter content and uneven mixing of materials; 3) The time period of biogas fermentation is long, and incomplete fermentation occurs due to the back-mixing of (new and old) materials during stirring; 4) Large-scale biogas fermentation mostly adopts the method of backflow of fermentation liquid for inoculation, which is difficult to do for large amounts of materials 5) According to the theoretical curve of organic biogas fermentation gas production, a large amount of biogas is produced in the early stage of fermentation (especially high-temperature fermentation). Fermentation is carried out at the natural temperature of the fermented material.

This invention is a device suitable for large-scale biogas production developed based on the above-mentioned background combined with the development of biomass resources in my country.

Invention content:

The large-scale external drive overall horizontal rotary continuous biogas dry fermentation device and method adopts a two-phase anaerobic fermentation process, and the whole system is divided into a hydrolysis acidification fermentation part and a methane fermentation part.

A large-scale externally driven overall horizontal rotary continuous biogas dry fermentation device, characterized in that it mainly includes a methane fermentation cabin, a hydrolysis fermentation cabin, a feed bin, a hydrolysis feed screw pump, a hydrolysis feed steam heating heat exchanger, a hydrolysis feed Discharge and material adjustment bin, methane fermentation chamber feed screw pump, methane feed steam heating heat exchanger;

Both the methane fermentation cabin and the hydrolysis fermentation cabin are cylindrical cabins, and the main screw fins are fixed in the cylindrical cabins. The radial sheets of the structure are parallel to each other and basically perpendicular to the central axis of the helical structure. The main helical fins extend from the bottom of the cylindrical cabin to the top of the cylindrical cabin. There is a gap between the main helical fins and the inner surface of the cylindrical cabin. The sheet on the radially outer side of the main helical fin is fixed to the inner surface of the cylindrical cabin through dispersed helical fin fixing columns; the main helical fin is also provided with transverse fins, which are composed of a group of parallel long round rods , the long round rods are parallel to the central axis of the main screw fins, there are gaps between the long round rods, and there are long round rods distributed between the inner diameter and the outer diameter of the main screw fins, and the oblong circles of the transverse fins on the radial surface of the main screw fins The rods are arranged in a straight line or an arc. It is preferable that there is a deviation angle between the radius of the transverse fin and the main spiral fin, that is, the long round rods at both ends of the transverse fin are not on the same diameter of the main spiral fin, and the long round rods of the transverse fin are not on the same diameter of the main spiral fin. Transverse and fixed on the sheets of the main spiral fins; the main spiral fins at a certain height from the bottom to the middle of the cylindrical cabin are equipped with transverse fins, and there are no transverse fins on the main spiral fins at the top of the cylindrical cabin; A plurality of transverse fins are distributed on the radial surface of the main spiral fin; the bottom opening of the cylindrical cabin is sealed by a mechanical sealing disc, and the cylindrical cabin can rotate relative to the mechanical sealing disc, and a feed port is provided on the mechanical sealing disc seal; the cylindrical cabin The top opening of the body is sealed by the discharge mechanical seal plate, and the discharge mechanical seal plate is provided with an exhaust pipe and a discharge pipe;

The feed bin (8) is equipped with stirring equipment through the mixer (7). The feed bin (8) passes through the hydrolysis feed screw pump (9) and the hydrolysis acidification feed steam heating heat exchanger (10) sequentially. The feed steam heating heat exchanger (10) is connected to the inlet of the hydrolysis fermentation cabin feed mechanical seal plate (26) through the feed pipe (20) of the hydrolysis fermentation cabin; the outlet of the hydrolysis fermentation cabin discharge mechanical seal plate (27) is The feed pipe is connected to the hydrolysis fermentation chamber discharge pipe (22) and the hydrolysis discharge and material adjustment chamber (14). The hydrolysis discharge and material adjustment chamber (14) is sequentially connected to the methane fermentation chamber feed screw pump (15) and the methane feed steam heating. The heat exchanger (16) is connected, and the methane feed steam heating heat exchanger (16) is connected with the feed port of the methane fermentation cabin feed mechanical seal plate (28) by the methane fermentation cabin feed pipe (23);

The hydrolysis fermentation cabin and the methane fermentation cabin are placed obliquely, and the exhaust pipes of the hydrolysis fermentation cabin and the methane fermentation cabin are located above the discharge pipe; the external surface of the hydrolysis fermentation cabin is provided with a driving gear (12) outside the hydrolysis fermentation cabin. The driving gear (12) cooperates with the low-level external drive device (11) of the hydrolysis fermentation cabin and the high-level external drive device (13) of the hydrolysis fermentation cabin to drive the rotation of the hydrolysis fermentation cabin; the external surface of the methane fermentation cabin is provided with a methane fermentation external drive gear ( 18), the driving gear (18) outside the methane fermentation cabin cooperates with the low-level external driving device (17) of the methane fermentation cabin and the high-level external driving device (19) of the methane fermentation cabin, and can drive the rotation of the methane fermentation cabin.

The method for continuous fermentation using the above-mentioned device is characterized in that, comprising the following steps:

The fermented biomass mixture is put into the feeding bin (8) in proportion, and the material is homogenized under the stirring of the feeding mixer 7, and the material is pressurized by the hydrolysis feeding screw pump (9) and heated by the hydrolysis and acidification feed steam for heat exchange The device (10) is heated and enters the hydrolysis fermentation cabin through the hydrolysis and acidification feed pipe (20). The hydrolysis fermentation cabin (4) rotates at a slower speed while the hydrolysis fermentation cabin feeding mechanical sealing disc (26) does not rotate. The hydrolysis fermentation sealing turntable (26) and the hydrolysis fermentation cabin (4) realize the dynamic and static sealing connection through the mechanical seal; the materials entering the hydrolysis fermentation cabin (4) are pushed by the main spiral fins (5) Under continuous stirring with the transverse fins (6) of the hydrolysis fermentation cabin, it slowly advances along the central axis of the hydrolysis fermentation cabin (4) toward the outlet of the hydrolysis fermentation cabin; during the hydrolysis fermentation process, due to the entire hydrolysis fermentation cabin (4) placed in an inclined horizontal position, the fermentation liquid produced during the fermentation process will flow to the hydrolysis fermentation cabin ( 4) The lower part, the fermentation broth flowing to the lower part of the hydrolysis fermentation cabin (4), under the joint stirring action of the rotating hydrolysis fermentation main spiral fin (5) and the hydrolysis fermentation cabin transverse fin (6), completes the fermentation broth Stirring and mixing with new materials, this process realizes uniform inoculation of materials and stirring in the process of hydrolysis and fermentation; materials that have been hydrolyzed and fermented are pushed to the hydrolysis and fermentation discharge pipe (22) by the main screw fins (5) of hydrolysis and fermentation The location of the hydrolysis fermentation cabin discharge sealing plate is fixedly connected with the hydrolysis fermentation cabin discharge pipe (22) and the hydrolysis fermentation cabin exhaust pipe (21); during operation, the hydrolysis fermentation cabin (4) rotates, and the hydrolysis fermentation cabin outlet The material sealing plate (27) does not rotate, and the two are in the same way as the mechanical sealing method of the feeding material, and the leak-free pressure-bearing connection is realized through the mechanical seal; the material leaves the hydrolysis fermentation cabin (4) along the discharge pipe (22) of the hydrolysis fermentation cabin, and enters the hydrolysis fermentation cabin. The discharge and material adjustment chamber (14), where the material is adjusted for pH, is then pressurized by the methane fermentation chamber feed screw pump (15) and heated by the methane fermentation chamber feed steam heating heat exchanger (16), and then is fed by the methane fermentation chamber The feed pipe (23) enters the methane fermentation cabin (1), and the methane fermentation cabin (1) rotates at a relatively slow speed while the methane fermentation cabin feeding mechanical sealing disc (28) does not rotate, and the methane fermentation cabin feeds The mechanical seal between the turntable (28) and the methane fermentation cabin (1) is also sealed and connected by a mechanical seal. The materials entering the methane fermentation cabin (1) are pushed by the main screw fins (2) of the methane fermentation cabin and methane fermentation. Under the continuous stirring of the transverse fins (3) of the cabin, it slowly advances along the central axis of the methane fermentation cabin (1) toward the outlet of the methane fermentation cabin. During the methane fermentation process, the entire methane fermentation cabin (1) Placed in an inclined horizontal position, the fermentation liquid produced during the fermentation process will flow to the methane fermentation cabin (1) along the gap (33) set by the main spiral fin (2) of the methane fermentation cabin and the inner wall of the methane fermentation cabin (1) The lower part, the fermentation broth flowing to the lower part of the methane fermentation cabin (1) is rotating Under the stirring action of the main spiral piece (2) of the methane fermentation cabin and the transverse vane (3) of the methane fermentation cabin, the stirring with the new material is completed. This process realizes the uniform inoculation of the material and the stirring of the methane fermentation process. , the material that has undergone methane fermentation is pushed to the position of the methane fermentation discharge pipe (25) by the main screw (2) of the methane fermentation cabin, and the material leaves the methane fermentation cabin (1) along the methane fermentation discharge pipe (25), and the methane fermentation The generated biogas will enter the biogas storage tank through the exhaust pipe (24) of the methane fermentation cabin. The sealing of the discharge part of the methane fermentation cabin is carried out in the same way as that of the hydrolysis fermentation tank.

The invention can realize continuous fermentation.

During the continuous fermentation process, the material is heated to 33±2°C after passing through the hydrolysis acidification feed steam heating heat exchanger (10); the hydrolysis fermentation residence time is 5 days; the material passes through the methane fermentation cabin feed steam heating heat exchanger After (16), the material is heated to 55±2°C, and the methane fermentation residence time is 20 days.

The main screw fins and transverse fins of the hydrolysis fermentation cabin and the methane fermentation cabin of the present invention can be adjusted as required.

The present invention has the following advantages: 1) It truly realizes continuous fermentation without mixing materials; 2) Due to the low overall rotation speed, the fermentation liquid is accumulated at the bottom of the fermentation chamber. And local high-intensity stirring to achieve high-efficiency inoculation. 3) Two-phase anaerobic (first-phase medium-temperature hydrolytic acidification, second-phase high-temperature biogas fermentation), which effectively maintains the reaction environment of each fermentation stage, and the high-temperature stage effectively inhibits the activity of hydrolytic acidification bacteria; 4) Driven outside the fermentation chamber The overall rotation greatly reduces the stirring and mixing power, and the overall stirring is more uniform; 5) Through the overall rotation of the fermentation chamber, uniform discharge and overall push-flow material flow are realized, and no mixing of materials during the entire reaction process is realized, making the fermentation more thorough.

In order to achieve the above goals, the present invention first adopts a steel horizontal tank body in the overall design of the biogas fermentation cabin. The entire cylindrical tank body presents an inclined setting with a low feed port end and a high discharge port end. The central axis of the fermentation cabin and The angle between the horizontal line is (5-30°). This setting method can make the fermentation liquid in the cabin continuously flow back to the bottom of the fermentation cabin (that is, the initial end of the reaction) by gravity flow. Driven by the external driving force, the whole tank rotates around the central axis of the tank during operation.

The tank material stirring and propulsion design adopts the main screw wing fixed on the inner wall of the fermentation cabin and runs through the entire fermentation cabin. When the tank rotates, the built-in fins rotate with the tank to realize the stirring of the fermentation material and the overall direction to the outlet. advance. The main rotor screw and the inner wall of the tank are fixed by fixed points at intervals, and a certain gap (5-10mm) is formed between the screw wing and the inner wall of the tank, so that the fermentation liquid can flow back to the bottom of the fermentation tank along the bulkhead. The main spiral fins in the main reaction area are equipped with small transverse fins to increase the stirring intensity of the main reaction area, so as to facilitate the mixing of the biogas fermentation liquid and materials that flow back to the main reaction area along the bulkhead.

The material inlet and outlet are mechanically sealed, and the material is heated by steam in the inlet pipe.

Description of drawings

Figure 1. Schematic diagram of a large-scale external drive overall horizontal rotary continuous biogas dry fermentation device;

Fig. 2 The axial view of the main spiral fins of the hydrolysis fermentation cabin and the transverse fins of the hydrolysis fermentation cabin (1-1 sectional view);

Fig. 3 Axial view of the main spiral fins of the methane fermentation cabin and the transverse fins of the methane fermentation cabin (section 2-2);

The structural representation of Fig. 4 main helical fin and transverse fin;

Among them: 1 methane fermentation cabin body; 2 methane fermentation cabin main spiral wings; 3 methane fermentation cabin transverse wings; 4 hydrolysis fermentation cabin body; 5 hydrolysis fermentation cabin main spiral wings; 6 hydrolysis fermentation cabin transverse wings; 7 Feed bin mixer; 8 Feed bin; 9 Hydrolysis feed screw pump; 10 Hydrolysis feed steam heating heat exchanger; 11 Hydrolysis fermentation cabin low external driving device; 12 Hydrolysis fermentation cabin external drive gear; 13 Hydrolysis fermentation cabin high External drive device; 14 Hydrolysis discharge and material adjustment bin; 15 Methane fermentation cabin feed screw pump; 16 Methane feed steam heating heat exchanger; 17 Methane fermentation cabin low external drive device; 18 Methane fermentation cabin external drive gear; 19 Methane 20 Hydrolysis fermentation cabin feed pipe; 21 Hydrolysis fermentation cabin exhaust pipe; 22 Hydrolysis fermentation cabin discharge pipe; 23 Methane fermentation cabin feed pipe; 24 Methane fermentation cabin exhaust pipe (connected to biogas storage Gas tank); 25 Methane fermentation cabin discharge pipe; 26 Hydrolysis fermentation cabin feed mechanical seal plate; 27 Hydrolysis fermentation cabin discharge mechanical seal plate; 28 Methane fermentation cabin feed mechanical seal plate; 29 Methane fermentation cabin discharge mechanical seal Plate; 30 methane fermentation cabin main screw wing fixed column; 31 hydrolysis fermentation cabin main screw wing fixed column; 32 hydrolysis fermentation cabin main screw wing and fermentation cabin inner wall gap; 33 methane fermentation cabin main screw wing and fermentation cabin inner wall gap.

detailed description

The present invention will be further described below in conjunction with the examples, but the present invention is not limited to the following examples. The overall device of the following embodiments is shown in Figure 1, and the structure of each part can be seen in Figures 2-4.

The fermented biomass mixture is put into the feeding bin 8 in proportion, and the material is homogenized under the stirring of the feeding mixer 7, and the material is pressurized by the hydrolysis feeding screw pump 9, and the hydrolysis and acidification feed pipe 20 is used to enter the hydrolysis fermentation cabin . During this process, the material is heated to 33±2° C. through the hydrolysis and acidification feed steam heating heat exchanger 10 . The hydrolysis and acidification fermentation cabin 4 rotates at a relatively slow speed while the hydrolysis fermentation cabin feeding mechanical sealing disc 26 does not rotate, and the hydrolysis fermentation sealing turntable 26 and the hydrolysis fermentation cabin 4 realize dynamic and static sealing connections through mechanical seals. The material entering the hydrolysis fermentation cabin 4 is driven by the main screw fins 5 of the hydrolysis fermentation cabin and continuously stirred by the transverse wings 6 of the hydrolysis fermentation cabin, along the direction of the central axis of the fermentation cabin 4, to the outlet of the hydrolysis fermentation cabin. The direction is advancing slowly, and the process takes 5 days. During the hydrolysis fermentation process, since the entire hydrolysis fermentation cabin 4 is placed in an inclined horizontal position, the fermentation liquid produced in the fermentation process will flow to the hydrolysis fermentation cabin along the gap 32 provided by the main spiral fin 5 and the inner wall of the hydrolysis fermentation cabin 4 The lower part of 4, the fermentation liquid flowing to the lower part of the hydrolysis fermentation cabin 4, under the agitation of the rotating hydrolysis fermentation main spiral piece 5 and the transverse wing 6, completes the stirring of the fermentation liquid with the material, and this process realizes the uniformity of the material Agitation during inoculation and hydrolytic fermentation. After 5 days of hydrolysis and fermentation, the material is pushed to the position of the hydrolysis fermentation discharge pipe 22 by the main screw blade 5, and the discharge sealing plate of the hydrolysis fermentation cabin is fixedly connected with the hydrolysis discharge pipe 22 and the hydrolysis fermentation exhaust pipe 21 . During operation, the hydrolysis fermentation chamber 4 rotates, while the hydrolysis discharge sealing disc 27 does not rotate. The two are the same as the feeding mechanical sealing method, and realize no-leakage pressure-bearing connection through the mechanical seal. The material leaves the hydrolysis fermentation chamber 4 along the discharge pipe and enters the hydrolysis discharge and material adjustment chamber 14, where the material completes pH adjustment, and then is pressurized by the feeding screw pump 15 of the methane fermentation chamber and enters the methane fermentation chamber through the feed pipe 23 of the methane fermentation chamber. In fermentation cabin 1. During this process, the material passes through the feed steam heating heat exchanger 16 in the methane fermentation cabin, and the material is heated to 55±2°C. The methane fermentation cabin 1 rotates at a relatively slow speed during operation, while the feed mechanical seal disc 28 of the methane fermentation cabin does not rotate, and the mechanical seal between the methane fermentation cabin feed mechanical seal turntable 28 and the methane fermentation cabin 1 is also sealed by a mechanical seal. . The materials entering the methane fermentation cabin 1 are driven by the main spiral fins 2 of the methane fermentation cabin and continuously stirred by the transverse fins 3 of the methane fermentation cabin, and flow out to the methane fermentation cabin along the central axis of the methane fermentation cabin 1. The direction of the feed port is slowly advanced, and the process takes 20 days. During the methane fermentation process, since the entire methane fermentation cabin 1 is placed in an inclined horizontal position, the fermentation liquid produced during the fermentation process will flow to the methane fermentation cabin along the gap 33 provided by the main spiral fin 2 and the inner wall of the methane fermentation cabin 1 1, the fermentation liquid flowing to the lower part of the methane fermentation cabin 1, under the agitation of the main screw 2 and the transverse fin 3 of the methane fermentation cabin in a rotating state, completes the mixing of the fermentation liquid and the material, and this process realizes the material Uniform inoculation and agitation during methane fermentation. After 20 days of methane fermentation, the material is pushed by the main screw blade 2 to the position of the methane fermentation discharge pipe mouth 25, and the material leaves the methane fermentation chamber 1 along the discharge pipe 25, and the biogas produced by methane fermentation will pass through the methane fermentation chamber The exhaust pipe 24 enters the biogas holder. The sealing of the discharge part of the methane fermentation cabin is carried out in the same way as that of the hydrolysis fermentation tank.

Example 1

1. Cabin

Made of stainless steel, the effective volume of the hydrolysis fermentation cabin is 3.0m ³ , and the effective volume of the methane fermentation cabin is 10m ³ . The angle between the fermentation cabin and the horizontal plane is 14°.

2. Main screw and attached fins

For hydrolysis fermentation, the pitch of the main spiral fins is 200mm, with additional transverse fins, the length of which is 200mm, and only in the last 1/5 area of the hydrolysis acidification reaction chamber without additional transverse fins; for methane fermentation, the pitch of the main spiral fins is 400mm, with additional Small transverse fins, the length of the transverse fins is 400mm, and no transverse small fins are installed in the last 1/3 area of the methane fermentation tank.

3. Volume of fermentation chamber

The hydrolysis fermentation cabin has a diameter of 1.2m, a length of 4.0m, an overall volume of 4.5m ³ and an effective volume of 3.2m ³ . The diameter of the methane fermentation cabin is 1.6m, the length is 8.0m, the overall volume is 16.0m ³ , and the effective volume is 11.2m ³ .

4. Reaction conditions

The hydrolytic acidification fermentation temperature is 33±2°C; the methane fermentation temperature is 55±2°C; the heating steam temperature is 65°C.

5. Raw material

The raw material is 70% dewatered sludge from urban sewage plants with a moisture content of 80%, plus 30% crushed corn stalks (particle size 5.0mm-15.0mm) and water to adjust the moisture content to 80%.

6. Device capacity

The feed rate is 0.5m ³ /d, the residence time of hydrolysis fermentation is 5d, and the residence time of methane fermentation is 20d. The gas output of the fermentation unit is 102.5m ³ /d.

Claims (8)

1. one kind large-scale outer driving Integral horizontal type rotates continuous biogas dry fermentation device, it is characterized in that, mainly include methane fermentation cabin, hydrolysed ferment cabin, feeding warehouse, hydrolysis feed auger pump, hydrolysis feed vapors heating heat exchanger, hydrolysis discharging and material surge bunker, methane fermentation cabin feed auger pump, methane feed steam heating heat exchanger；

Methane fermentation cabin, hydrolysed ferment cabin are column type nacelle, principal screw fin it is fixed with in cylindrical compartment body, principal screw fin is the helical structure that the tablet with width spirals around cylinder nacelle central shaft, the central shaft of and substantially vertical helical structure parallel to each other at helical structure tablet radially, principal screw fin extends to the top of cylinder nacelle from the bottom of cylinder nacelle, principal screw fin has gap with surface in cylindrical compartment body, and the tablet of principal screw fin radial outside is fixed with surface in cylindrical compartment body by the fixing post of scattered helical wing plate；Principal screw fin is additionally provided with transverse fin, transverse fin is made up of oval bar one group parallel, oval bar is parallel with principal screw longitudinal centerline axle, space is all had between oval bar, the internal diameter of principal screw fin is distributed between external diameter oval bar, on the diametric plane of principal screw fin, the oval bar of transverse fin is straight configuration or camber line layout, between the radius of transverse fin and principal screw fin, there is deviation angle, namely the oval bar at transverse fin two ends not principal screw fin same diametrically, the oval bar of transverse fin crosses and is fixed on the tablet of principal screw fin；Cylinder nacelle is furnished with transverse fin on the principal screw fin of bottom to middle part height, and the principal screw fin at cylinder nacelle top does not have layout transverse fin；The diametric plane of principal screw fin is distributed multiple transverse fin；The bottom opening of cylinder nacelle is sealed by mechanical seal dish, and cylinder nacelle relative mechanical seal disc can rotate, and mechanical seal dish seals and is provided with charging aperture；The open top of cylinder nacelle is sealed by discharging machinery seal disc, and discharging machinery seal disc is provided with exhaustor and discharge nozzle；

It is provided with mixing plant by blender (7) in feeding warehouse (8), feeding warehouse (8) is successively via hydrolysis feed auger pump (9), hydrolysis acidification feed vapors heating heat exchanger (10), and hydrolysis acidification feed vapors heating heat exchanger (10) charging aperture through hydrolysed ferment cabin feed pipe (20) with hydrolysed ferment cabin charging machinery seal disc (26) is connected；The discharge nozzle of hydrolysed ferment cabin discharging machinery seal disc (27) is connected with hydrolysis discharging and material surge bunker (14) by hydrolysed ferment cabin discharge nozzle (22) and is hydrolyzed discharging and material surge bunker (14) and is connected with methane fermentation cabin feed auger pump (15), methane feed steam heating heat exchanger (16) successively, and methane feed steam heating heat exchanger (16) is connected by the charging aperture in methane fermentation cabin feed pipe (23) with methane fermentation cabin charging machinery seal disc (28)；

Hydrolysed ferment cabin, the equal slant setting in methane fermentation cabin, hydrolysed ferment cabin, methane fermentation cabin exhaustor be positioned at the top of discharge nozzle；Hydrolysed ferment surface out of my cabin is provided with hydrolysed ferment and drives gear (12) out of my cabin, hydrolysed ferment drives the outer driving device (11) of gear (12) and hydrolysed ferment cabin low level and the outer driving device (13) of a hydrolysed ferment cabin high position to coordinate out of my cabin, it is possible to drive hydrolysed ferment cabin to rotate；Methane fermentation surface out of my cabin is provided with methane fermentation and drives gear (18) out of my cabin, methane fermentation drives the outer driving device (17) of gear (18) and methane fermentation cabin low level and the outer driving device (19) of a methane fermentation cabin high position to coordinate out of my cabin, it is possible to drive methane fermentation cabin to rotate。

2. according to the device of claim 1, it is characterised in that central axis and the horizontal angle in hydrolysed ferment cabin and methane fermentation cabin are 5-30 °。

3. according to the device of claim 1, it is characterised in that forming interstitial gap width between inwall and the principal screw fin in hydrolysed ferment cabin and methane fermentation cabin is 5-10mm。

4. adopt the method that the device of claim 1 carries out continuous fermentation, it is characterised in that comprise the following steps:

Fermentation of biomass compound is put in proportion in feeding warehouse (8), material homogenizing is made under feed paddle machine (7) stirs, material enters in hydrolysed ferment cabin through hydrolysis feed auger pump (9) pressurization and hydrolysis acidification feed vapors heating heat exchanger (10) heating through hydrolysed ferment cabin feed pipe (20), rotate with slower speed during the work of hydrolysed ferment cabin (4), and hydrolysed ferment cabin charging machinery seal disc (26) does not rotate, hydrolysed ferment cabin charging machinery seal disc (26) is with being realized dynamic and quiet being tightly connected between hydrolysed ferment cabin (4) by mechanical seal；Enter the material in hydrolysed ferment cabin (4), under promotion in hydrolysed ferment cabin principal screw fin (5) and being stirred continuously in hydrolysed ferment cabin transverse fin (6), along the central axis direction of hydrolysed ferment cabin (4), it is slowly advanced to discharging opening direction, hydrolysed ferment cabin；In hydrolysed ferment process, due to the whole inclined horizontal placement of hydrolysed ferment cabin (4), the fermentation liquid produced in sweat will flow to hydrolysed ferment cabin (4) bottom along the gap (32) set by hydrolysed ferment cabin principal screw fin (5) and hydrolysed ferment cabin (4) inwall, it flow to the fermentation liquid of hydrolysed ferment cabin (4) bottom, it is stirred together under effect in hydrolysed ferment principal screw fin (5) in rotation status and hydrolysed ferment cabin transverse fin (6), complete fermentation liquid with the stirring mixing newly entering material, this process achieves the stirring of uniformly inoculation and the hydrolysed ferment process of material；Through the material that hydrolysed ferment completes, being hydrolyzed fermentation principal screw fin (5) and push to the position of hydrolysed ferment discharge nozzle (22), discharging seal disc in hydrolysed ferment cabin is fixedly connected hydrolysed ferment cabin discharge nozzle (22) and hydrolysed ferment cabin exhaustor (21)；During operation, hydrolysed ferment cabin (4) rotate, and hydrolysed ferment cabin discharging seal disc (27) does not rotate, and both are the same with charging machinery sealing means, realize No leakage pressure-bearing by mechanical seal and connect；Material leaves hydrolysed ferment cabin (4) along hydrolysed ferment cabin discharge nozzle (22), enter hydrolysis discharging and material surge bunker (14), material completes pH regulator at this, then entered in methane fermentation cabin (1) by methane fermentation cabin feed pipe (23) after methane fermentation cabin feed auger pump (15) pressurization and methane fermentation cabin feed vapors heating heat exchanger (16) heating, rotate with slower speed during the work of methane fermentation cabin (1), and methane fermentation cabin charging machinery seal disc (28) does not rotate, methane fermentation cabin charging machinery seal disc (28) is with between methane fermentation cabin (1), realize being tightly connected again by mechanical seal, enter the material in methane fermentation cabin (1), under promotion in methane fermentation cabin principal screw fin (2) and being stirred continuously in methane fermentation cabin transverse fin (3), central axis direction along methane fermentation cabin (1), it is slowly advanced to discharging opening direction, methane fermentation cabin, in methane fermentation process, due to the whole inclined horizontal placement of methane fermentation cabin (1), the fermentation liquid produced in sweat, to flow to methane fermentation cabin (1) bottom along the gap (33) set by methane fermentation cabin principal screw fin (2) and methane fermentation cabin (1) inwall, the fermentation liquid flowing to methane fermentation cabin (1) bottom is mixed under effect in methane fermentation cabin principal screw fin (2) in rotation status and stirring of methane fermentation cabin transverse fin (3) jointly, complete with the stirring newly entering material, this process achieves the stirring of uniformly inoculation and the methane fermentation process of material, the material completed through methane fermentation is pushed to the position of methane fermentation discharge nozzle (25) by methane fermentation cabin principal screw fin (2), material leaves methane fermentation cabin (1) along methane fermentation discharge nozzle (25), biogas produced by methane fermentation will enter methane holder through methane fermentation cabin exhaustor (24)；Output section, methane fermentation cabin seals to adopt implements with the mode that hydrolysed ferment cabin is same。

5. according to the method for claim 4, it is characterised in that in carrying out Continuous Fermentation Processes, material is after hydrolysis acidification feed vapors heating heat exchanger (10), and material is heated to 33 ± 2 DEG C。

6. according to the method for claim 4, it is characterised in that 5 days hydrolysed ferment time of staying。

7. according to the method for claim 4, it is characterised in that material is behind methane fermentation cabin feed vapors heating heat exchanger (16), and material is heated to 55 ± 2 DEG C。

8. according to the method for claim 4, it is characterised in that 20 days methane fermentation time of staying。