CN110643639A - High-concentration straw biogas fermentation method - Google Patents
High-concentration straw biogas fermentation method Download PDFInfo
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Abstract
The invention belongs to the technical field of biogas fermentation, in particular to a high-concentration straw biogas fermentation method, which comprises a biogas fermentation tank for fermenting biogas; according to the method, the steel wire mesh in the biogas fermentation tank moves to drive the fermentation liquor in the biogas fermentation tank to circularly flow, so that the raw materials are fully fermented, and crusts on the surface of the fermentation liquor are damaged, thereby being beneficial to releasing biogas and improving the fermentation effect of high-concentration straw biogas; in the method, the screw threads and the slip rings are arranged on the surface of the connecting shaft at intervals, so that the grids on the steel wire mesh can better cut and crush the scum crusts, the influence of the scum crusts on the surface of the biogas fermentation liquid on the fermentation quality is reduced, and the fermentation effect of the high-concentration straw biogas is improved.
Description
Technical Field
The invention belongs to the technical field of biogas fermentation, and particularly relates to a high-concentration straw biogas fermentation method.
Background
Biogas is a mixed gas produced by the fermentation of organic substances under anaerobic conditions. Biogas, as the name implies, is the gas in the marsh. People often see that bubbles emerge from marshland, sewage ditches or septic tanks, and if people scratch matches, the matches can be ignited, which is the natural marsh gas. This gas is called biogas because it was first found in marshes. Various organic matters such as human and animal excreta, straws, sewage and the like are fermented in a closed methane tank under the anaerobic (oxygen-free) condition and decomposed and converted by a plurality of methane fermentation microorganisms, thereby generating methane.
Biogas is a mixture of gases with properties similar to natural gas. Besides direct combustion for cooking, drying agricultural and sideline products, heating, lighting and gas welding, the marsh gas can also be used as fuel of internal combustion engine and chemical raw material for producing methanol, formalin, carbon tetrachloride and the like. The feed liquid and the sediments discharged after the fermentation of the biogas device contain rich nutrient substances and can be used as fertilizer and feed.
The crop straw is a byproduct with the largest quantity in agricultural production, is a large amount of persistent precious resources, and if the crop straw is comprehensively utilized, the crop straw can be changed into valuables, the ecological environment is protected, the sustainable development of agricultural production is promoted, and a large amount of cheap raw materials can be provided for fertilizers, livestock raising, edible fungi, energy sources, processing industry and the like, so that the revolution of rural industrial structures and even whole rural structures is driven, and the improvement of the life quality of farmers and the improvement of urban and rural environments are promoted. In the past, farmers can not recognize that the straws are a precious resource and discard or burn the straws, so that not only is the resource waste caused, but also serious environmental pollution is brought, and social problems such as traffic safety and the like are caused.
Although the phenomenon of straw burning is reduced under the enforcement of relevant policies, the waste of straw and the pollution to the environment can be only restrained to a certain extent by using the penalty measures for burning straw. The comprehensive utilization of the straw is enhanced, so that the problems of resource shortage and environmental pollution can be solved, the income of farmers is increased to a certain extent, and the problem of rural labor excess is reduced. It is worth noting that the comprehensive utilization of the straws needs to be developed for a long time, and the blockage is changed into the dredging function, for example, the technology for preparing the biogas by fermenting the straws converts the straws of the crops into clean, efficient and convenient cheap energy, and changes the innovation and the popularization of the utilization technology of the resource which is misplaced into real useful energy.
As can be seen from the laboratory model biogas digester, the biogas digester is obviously divided into four layers without stirring, and the four layers are a scum layer, a supernatant layer, an active layer and a sediment layer from top to bottom. Such a layered distribution is very disadvantageous for microorganisms and gas production. The raw materials and the microorganisms are unevenly distributed, a large number of microorganisms gather on the bottom layer to move, the inoculated sludge is large, the anaerobic condition is good, but the raw materials are lack, particularly, the straws are rich in carbon, and the raw materials are easy to float on the surface layer of the feed liquid, are not easy to be absorbed and decomposed by the microorganisms, form compact crusts at the same time, are not beneficial to the release of the biogas, and are further not beneficial to the fermentation effect of the high-concentration straw biogas.
In view of the above, the invention provides a high-concentration straw biogas fermentation method, wherein a moving steel wire mesh is added in a biogas fermentation tank, so that the fermentation liquid circularly flows and the crust on the surface of the fermentation liquid is damaged, thereby effectively improving the fermentation effect of the high-concentration straw biogas.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides the high-concentration straw biogas fermentation method, which is characterized in that a moving steel wire mesh is added in a biogas fermentation tank, so that the fermentation liquor circularly flows and the crust on the surface of the fermentation liquor is damaged, and the fermentation effect of the high-concentration straw biogas is effectively improved.
The technical scheme adopted by the invention for solving the technical problems is as follows: the invention relates to a high-concentration straw biogas fermentation method, which comprises the following steps:
s1: crushing straw raw materials to 7-10cm, putting the crushed straw raw materials into the shell through an inlet of an upper cover of a biogas fermentation tank to mix the straw in the shell with fermentation liquor, putting a steel wire mesh into the shell through a connecting shaft by passing through a slip ring, and closing the upper cover;
s2: after the upper cover is closed in S1, the electromagnet switch is started every 2-3 months through the time controller to attract the annular magnet to drive the steel wire mesh to move downwards, and after the time controller is closed, the spring drives the steel wire mesh to rebound upwards to stir the fermentation liquor;
s3: continuously stirring the fermentation liquor in S2 for 1-2 hours, standing for 7-10 days to obtain biogas;
s4: introducing the biogas obtained in the step S3 into a gas storage tank through a gas outlet pipe, purifying and filtering to obtain high-purity biogas, and conveying the biogas to residents;
the biogas fermentation tank used in the S1 comprises a shell, an upper cover, an air outlet pipe, a connecting shaft, a steel wire mesh and a connecting block; the upper cover is fixedly connected to the upper end of the shell through a bolt, and a convex part is arranged on the lower surface of the middle part of the upper cover; a cavity is arranged in the shell, and the shell is made of non-ferromagnetic materials; the annular magnet is arranged on the outer wall of the shell in a sliding mode, and the bottom end of the outer wall of the shell is provided with an electromagnet; the annular magnet is connected with the electromagnet through a first spring; the first spring is sleeved on the outer wall of the shell; the air outlet pipe is connected with the upper cover through a connecting block and penetrates through the protruding part of the upper cover to be communicated with the inside of the cavity; the top end of the connecting shaft is connected to the bottom end of the bulge, and the other end of the connecting shaft is connected to the bottom wall of the shell; the steel wire mesh is eccentrically arranged on the connecting shaft; a controller is arranged in the shell and controls the automatic operation of the biogas fermentation tank; during the operation, during the fermentation process of the straw biogas, the phenomena of raw material floating and layered crusting of the feed liquid are easily generated in the fermentation tank, and the formed dense crusting is not beneficial to the release of the biogas and the removal of the fermented material, and is further not beneficial to the fermentation effect of the high-concentration straw biogas; when the controller controls the electromagnet to be powered off so that the electromagnet does not apply external force to the annular magnet any more, the annular magnet drives the steel wire mesh to reset under the action of the resilience force of a spring, so that the steel wire mesh which moves back and forth cuts scum crusts fermented inside the shell, the circular flow of fermentation liquor can be promoted, and the influence of the scum crusts on the surface of the fermentation liquor on the fermentation quality of the biogas is reduced; the beneficial effects of the invention are as follows: the fermentation liquid inside the fermentation tank is driven to circularly flow by the up-and-down movement of the steel wire mesh in the fermentation tank, so that the microorganisms on the scum layer, the supernatant layer, the sediment layer and the active layer are uniformly distributed, the raw materials are fully fermented, the crusts on the surface of the fermentation liquid are damaged, the release of the biogas is facilitated, and the fermentation effect of the high-concentration straw biogas is improved.
Preferably, at least five groups of threads are arranged on the surface of the connecting shaft at intervals, and each group of threads has at least four turns; the bottom end of the connecting shaft is symmetrically provided with a convex block, and the bottom surface of the shell is provided with a boss; the lug boss is provided with a groove, and a limiting groove for limiting the rotation of the lug boss is arranged in the groove; the side wall of the limiting groove is connected with the lug through an arc second spring; a slip ring is arranged at the joint of the connecting shaft and the steel wire mesh; the slip ring is provided with internal threads; a gap of 1-3cm is arranged between the outer ring of the steel wire mesh and the inner wall of the shell; when the device works, when the size of the steel wire mesh is fixed, the steel wire mesh can not fully and effectively crush and cut crusts, at the moment, the connecting shaft is provided with the spaced threads, so that the slip ring generates corresponding torque force to the connecting shaft when passing through the threads on the connecting shaft, the lug at the bottom of the connecting shaft rotates in the limiting groove and generates friction, thereby leading the rotating connecting shaft to rotationally pull the middle part of the steel wire mesh and leading the grids to be forcibly drawn towards the middle part, and simultaneously, the meshes outside the steel wire mesh are elastically stretched under the attraction of the annular magnet, so that the sizes of the meshes of the steel wire mesh are gradually reduced from outside to inside, and then the grids moving on the steel wire mesh can better cut and crush the scum crusts, so that the influence of the scum crusts on the surface of the biogas fermentation liquid on the fermentation quality is reduced, and the fermentation effect of the high-concentration straw biogas is improved.
Preferably, a limiting fixture block is fixedly mounted on the inner wall of the shell, an included angle between the limiting fixture block and the horizontal plane is 120-145 degrees, and the position of the limiting fixture block is set to be a quarter of the distance from the bottom wall of the shell to the steel wire mesh; when the device works, the arranged limiting fixture block can limit the movement position of the steel wire mesh, so that the damage to the stability of a bottom slag layer in the process of moving the steel wire mesh up and down is reduced; and the wire net is contacted the striking each other with spacing fixture block when moving down, and the permanent motion can cause the wearing and tearing destruction of spacing fixture block, makes the wire net at the in-process with spacing fixture block contact striking through the angle that sets up spacing fixture block, and the net of wire net at first falls the top of spacing fixture block, through the toughness with the help of the net, reduces the impact of wire net to spacing fixture block, strengthens the life and the result of use of spacing fixture block to the fermentation effect of high concentration straw marsh gas has further been improved.
Preferably, the outer end of the limiting clamping block is connected with the inner wall of the shell through a torsion spring; when the device works, when a steel wire mesh moves downwards to be in contact with the limiting clamping block, the end part of the limiting clamping block is clamped in a grid of the steel wire mesh, and in the process that the steel wire mesh continues to press the limiting clamping block downwards, the limiting clamping block connected with a torsional spring is stressed to rotate, so that the clamped grid is extruded, the grid in the middle of the steel wire mesh is subjected to elastic deformation sunken downwards, the cutting effect of the steel wire mesh on scum crusting is enhanced, and the limiting clamping block connected with the torsional spring can play a role in buffering the steel wire mesh; and the limiting clamping block at one end which moves away from the steel wire mesh can return to reset under the action of the torsion spring, so that the shaking effect of the limiting clamping block on the steel wire mesh is enhanced, the shaking steel wire mesh can effectively improve the flowing effect of fermentation liquor, and the fermentation effect of straw methane is further improved.
Preferably, the top end of the limiting clamping block is arranged to be an arc surface; during operation, the effectual area of contact who reduces spacing fixture block top and wire net of the arc surface that sets up, reduced the atress wearing and tearing of spacing fixture block on the one hand, on the other hand also makes spacing fixture block top block in the net of wire net more easily, and more light breaks away from in the net when the wire net upward movement, reduces the emergence of spacing fixture block top card death in the wire net to the stability of spacing fixture block work has been strengthened, the fermentation effect of straw marsh gas has been improved.
Preferably, the number of the limiting clamping blocks is at least four, the limiting clamping blocks are annularly and uniformly distributed on the inner wall of the shell, and each limiting clamping block is at least composed of three limiting pieces; during operation, through changing the quantity and the constitution form that spacing fixture block distributes, the effectual area of contact who increases spacing fixture block and wire net has strengthened the supporting effect of spacing fixture block to the wire net on the one hand, has also increased the extrusion deformation effect of spacing fixture block to wire net middle part net on the one hand to make the wire net carry out more effectual cutting to the dross crust, further improvement the fermentation effect of straw marsh gas.
The invention has the technical effects and advantages that:
1. according to the high-concentration straw biogas fermentation method provided by the invention, the steel wire mesh in the biogas fermentation tank moves to drive the fermentation liquid in the biogas fermentation tank to circularly flow, so that the raw materials are fully fermented, and crusts on the surface of the fermentation liquid are damaged, therefore, the release of biogas is facilitated, and the fermentation effect of the high-concentration straw biogas is improved.
2. According to the manufacturing method of the rotor, the threads and the slip rings are arranged on the surface of the connecting shaft at intervals, so that the grids on the steel wire mesh can better cut and crush scum crusts, the influence of the scum crusts on the surface of biogas fermentation liquor on the fermentation quality is reduced, and the fermentation effect of high-concentration straw biogas is improved.
Drawings
The invention will be further explained with reference to the drawings.
FIG. 1 is a diagram of the steps of the present invention;
FIG. 2 is a perspective view of the biogas fermenter according to the present invention;
FIG. 3 is a schematic structural view of a biogas fermentation tank according to the present invention;
FIG. 4 is a schematic view of the relationship between the steel wire mesh and the connecting shaft in the present invention;
FIG. 5 is a cross-sectional view taken at A-A of FIG. 3;
FIG. 6 is an enlarged view at B in FIG. 3;
in the figure: the device comprises a shell 1, a first spring 11, a boss 12, a limiting groove 13, an upper cover 2, an air outlet pipe 3, a connecting block 31, a connecting shaft 4, a convex block 41, a second spring 42, a thread 43, an annular magnet 5, an electromagnet 6, a steel wire mesh 7, a sliding ring 71, a limiting clamping block 8, a torsion spring 81 and a limiting sheet 82.
Detailed Description
In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.
As shown in figures 1-6, the high concentration straw biogas fermentation method of the invention comprises the following steps:
s1: crushing straw raw materials to 7-10cm, putting the crushed straw raw materials into the shell through an inlet of an upper cover of a biogas fermentation tank to mix the straw in the shell with fermentation liquor, putting a steel wire mesh into the shell through a connecting shaft by passing through a slip ring, and closing the upper cover;
s2: after the upper cover is closed in S1, the electromagnet switch is started every 2-3 months through the time controller to attract the annular magnet to drive the steel wire mesh to move downwards, and after the time controller is closed, the spring drives the steel wire mesh to rebound upwards to stir the fermentation liquor;
s3: continuously stirring the fermentation liquor in S2 for 1-2 hours, standing for 7-10 days to obtain biogas;
s4: introducing the biogas obtained in the step S3 into a gas storage tank through a gas outlet pipe, purifying and filtering to obtain high-purity biogas, and conveying the biogas to residents;
the biogas fermentation tank used in the S1 comprises a shell 1, an upper cover 2, an air outlet pipe 3, a connecting shaft 4, a steel wire mesh 7 and a connecting block 31; the upper cover 2 is fixedly connected to the upper end of the shell through a bolt, and a convex part is arranged on the lower surface of the middle part of the upper cover 2; a cavity is arranged inside the shell 1, and the shell 1 is made of non-ferromagnetic materials; an annular magnet 5 is slidably mounted on the outer wall of the shell 1, and an electromagnet 6 is arranged at the bottom end of the outer wall of the shell 1; the annular magnet 5 is connected with the electromagnet 6 through a first spring 11; the first spring 11 is sleeved on the outer wall of the shell 1; the air outlet pipe 3 is connected with the upper cover 2 through a connecting block 31, and the air outlet pipe 3 penetrates through a convex part of the upper cover 2 to be communicated with the inside of the cavity; the top end of the connecting shaft 4 is connected to the bottom end of the boss, and the other end of the connecting shaft 4 is connected to the bottom wall of the shell 1; the steel wire mesh 7 is eccentrically arranged on the connecting shaft 4; a controller is arranged in the shell 1 and controls the automatic operation of the biogas fermentation tank; during the operation, during the fermentation process of the straw biogas, the phenomena of raw material floating and layered crusting of the feed liquid are easily generated in the fermentation tank, and the formed dense crusting is not beneficial to the release of the biogas and the removal of the fermented material, and is further not beneficial to the fermentation effect of the high-concentration straw biogas; when the biogas fermentation tank operates, the controller controls the electrification of the electromagnet 6 to attract the annular magnet 5 at the top, so that the annular magnet 5 is forced to move downwards and simultaneously attracts the steel wire mesh 7 in the shell 1 to synchronously slide downwards, when the electromagnet 6 is controlled by the controller to be powered off, so that the electromagnet does not apply external force to the annular magnet 5 any more, the annular magnet 5 drives the steel wire mesh 7 to reset under the action of the resilience force of the first spring 11, so that the steel wire mesh 7 which moves back and forth cuts scum crusts fermented in the shell 1, the circular flow of fermentation liquor can be promoted, and the influence of the scum crusts on the surface of the fermentation liquor on the biogas fermentation quality can be reduced; the beneficial effects of the invention are as follows: the fermentation liquid inside the fermentation tank is driven to circularly flow by the up-and-down movement of the steel wire mesh 7 in the fermentation tank, so that the microorganisms on the scum layer, the supernatant layer, the sediment layer and the active layer are uniformly distributed, the raw materials are fully fermented, the crusts on the surface of the fermentation liquid are damaged, the release of the biogas is facilitated, and the fermentation effect of the high-concentration straw biogas is improved.
As an embodiment of the present invention, the surface of the connecting shaft 4 is provided with at least five sets of threads 43 at intervals, and each set of threads 43 has at least four turns; the bottom end of the connecting shaft 4 is symmetrically provided with convex blocks 41, and the bottom surface of the shell 1 is provided with a boss 12; the boss 12 is provided with a groove, and a limiting groove 13 for limiting the rotation of the lug 41 is arranged in the groove; the side wall of the limiting groove 13 is connected with the lug 41 through an arc second spring 42; a slip ring 71 is arranged at the joint of the connecting shaft 4 and the steel wire mesh 7; the slip ring 71 is provided with an internal thread; a gap of 1-3cm is arranged between the outer ring of the steel wire mesh 7 and the inner wall of the shell 1; when the device works, when the size of the mesh of the steel wire mesh 7 is fixed, the mesh of the steel wire mesh 7 cannot sufficiently crush and cut crusts, at the moment, the spacing threads 43 are arranged on the connecting shaft 4, so that the slip ring 71 generates corresponding torque force to the connecting shaft 4 when passing through the threads 43 on the connecting shaft 4, the lug 41 at the bottom of the connecting shaft 4 rotates in the limiting groove 13 and generates friction, the rotating connecting shaft 4 rotates and pulls the middle part of the steel wire mesh 7, the mesh is forcibly pulled towards the middle part, and meanwhile, the mesh outside the steel wire mesh 7 elastically stretches under the attraction of the annular magnet 5, so that the size of the mesh of the steel wire mesh 7 is gradually reduced from outside to inside, the mesh moving on the steel wire mesh 7 can better cut and crush the scum crusts, and the influence of the scum crusts on the surface of biogas fermentation liquor on the fermentation quality is reduced, thereby improving the fermentation effect of the high-concentration straw biogas.
As an embodiment of the invention, a limiting fixture block 8 is fixedly mounted on the inner wall of the shell 1, an included angle between the limiting fixture block 8 and a horizontal plane is 120-145 degrees, and the position of the limiting fixture block 8 is set to be a position which is one fourth of the distance from the bottom wall of the shell to the steel wire mesh 7 upwards; when the device works, the arranged limiting fixture block 8 can limit the movement position of the steel wire mesh 7, so that the damage to the stability of a bottom slag layer in the process that the steel wire mesh 7 moves up and down is reduced; and wire net 7 during the downstream with spacing fixture block 8 mutual contact striking, permanent motion can cause the wearing and tearing destruction of spacing fixture block 8, make wire net 7 at the in-process with spacing fixture block 8 contact striking through the angle that sets up spacing fixture block 8, the net of wire net 7 falls the top of spacing fixture block 8 at first, through the toughness with the help of the net, reduce the impact of wire net 7 to spacing fixture block 8, strengthen the life and the result of use of spacing fixture block 8, thereby the fermentation effect of high concentration straw marsh gas has further been improved.
As an embodiment of the invention, the outer end of the limiting clamping block 8 is connected with the inner wall of the shell 1 through a torsion spring 81; when the device works, when the steel wire mesh 7 moves downwards to be in contact with the limiting fixture block 8, the end part of the limiting fixture block 8 is clamped in the grids of the steel wire mesh 7, and in the process that the steel wire mesh 7 continues to press the limiting fixture block 8 downwards, the limiting fixture block 8 connected with the torsion spring 81 is stressed to rotate, so that the clamped grids are extruded, the grids in the middle of the steel wire mesh 7 are subjected to elastic deformation sunken downwards, the cutting effect of the grids of the steel wire mesh 7 on floating slag crusting is enhanced, and the limiting fixture block 8 connected with the torsion spring 81 can play a role in buffering for the steel wire mesh 7; and the limiting fixture block 8 moving to one end away from the other end can return to reset under the action of the torsion spring 81, the shaking effect of the limiting fixture block 8 on the steel wire mesh 7 is enhanced, the shaking steel wire mesh 7 can effectively improve the flowing effect of fermentation liquor, and therefore the fermentation effect of straw biogas is improved in one step.
As an embodiment of the present invention, the top end of the limiting fixture block 8 is configured as an arc surface; during operation, the effectual area of contact who has reduced 8 tops of spacing fixture block and wire net 7 of arc surface that sets up, the atress wearing and tearing of spacing fixture block 8 have been reduced on the one hand, on the other hand also makes 8 easy blocks in the net of wire net 7 in spacing fixture block top, and break away from in the net from that the wire net is lighter when wire net 7 upward movement, reduce the emergence of 8 top card dies in wire net 7 of spacing fixture block, thereby the stability of 8 work of spacing fixture block has been strengthened, the fermentation effect of straw marsh gas has been improved.
As an embodiment of the present invention, the number of the limiting blocks 8 is at least four, and the limiting blocks 8 are annularly and uniformly distributed on the inner wall of the housing 1, and each limiting block 8 at least comprises three limiting pieces 82; during operation, through changing the quantity and the constitution form that spacing fixture block 8 distributes, the effectual area of contact who increases spacing fixture block 8 and wire net 7 has strengthened spacing fixture block 8 to wire net 7's supporting effect on the one hand, has also increased spacing fixture block 8 to the extrusion deformation effect of wire net 7 middle part net on the one hand to make wire net 7 carry out more effectual cutting to the dross crust, further improvement the fermentation effect of straw marsh gas.
When the device works, straw raw materials are crushed to be 7-10cm in length, the straw raw materials are thrown into the shell 1 through an inlet of an upper cover 2 of a biogas fermentation tank, the straw in the straw raw materials are mixed with fermentation liquor, the controller controls the electromagnet 6 to be electrified to attract the annular magnet 5 at the top, so that the annular magnet 5 is forced to move downwards and simultaneously attracts the steel wire mesh 7 in the shell 1 to synchronously slide downwards, when the controller controls the electromagnet 6 to be powered off so that the electromagnet does not apply external force to the annular magnet 5, the annular magnet 5 drives the steel wire mesh 7 to reset under the action of the rebound force of the first spring 11, and therefore the steel wire mesh 7 moving back and forth cuts scum crusts fermented in the shell 1, the circular flow of the fermentation liquor can be promoted, and the influence of the scum crusts on the biogas fermentation quality on the surface of the fermentation liquor is reduced; the beneficial effects of the invention are as follows: the up-and-down motion of steel wire net 7 drives its inside zymotic fluid circulation flow in through the fermentation cylinder for the microorganism evenly distributed of scum layer, supernatant layer, sediment layer and active layer, thereby make the raw materials fully ferment, and destroy the crust on zymotic fluid surface simultaneously, be favorable to the release of marsh gas, improve the fermentation effect of high concentration straw marsh gas, marsh gas passes through outlet duct 3 input gas holder afterwards, obtain high-purity marsh gas after the purification filters, carry the resident of family.
The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (6)
1. A high-concentration straw biogas fermentation method is characterized by comprising the following steps:
s1: crushing straw raw materials to 7-10cm, putting the crushed straw raw materials into the shell through an inlet of an upper cover of a biogas fermentation tank to mix the straw in the shell with fermentation liquor, putting a steel wire mesh into the shell through a connecting shaft by passing through a slip ring, and closing the upper cover;
s2: after the upper cover is closed in S1, the electromagnet switch is started every 2-3 months through the time controller to attract the annular magnet to drive the steel wire mesh to move downwards, and after the time controller is closed, the spring drives the steel wire mesh to rebound upwards to stir the fermentation liquor;
s3: continuously stirring the fermentation liquor in S2 for 1-2 hours, standing for 7-10 days to obtain biogas;
s4: introducing the biogas obtained in the step S3 into a gas storage tank through a gas outlet pipe, purifying and filtering to obtain high-purity biogas, and conveying the biogas to residents;
the biogas fermentation tank used in the S1 comprises a shell (1), an upper cover (2), an air outlet pipe (3), a connecting shaft (4), a steel wire mesh (7) and a connecting block (31); the upper cover (2) is fixedly connected to the upper end of the shell through a bolt, and a convex part is arranged on the lower surface of the middle part of the upper cover (2); a cavity is arranged in the shell (1), and the shell (1) is made of non-ferromagnetic materials; an annular magnet (5) is slidably mounted on the outer wall of the shell (1), and an electromagnet (6) is arranged at the bottom end of the outer wall of the shell (1); the annular magnet (5) is connected with the electromagnet (6) through a first spring (11); the first spring (11) is sleeved on the outer wall of the shell (1); the air outlet pipe (3) is connected with the upper cover (2) through a connecting block (31), and the air outlet pipe (3) penetrates through the convex part of the upper cover (2) to be communicated with the inside of the cavity; the top end of the connecting shaft (4) is connected to the bottom end of the protruding portion, and the other end of the connecting shaft (4) is connected to the bottom wall of the shell (1); the steel wire mesh (7) is eccentrically arranged on the connecting shaft (4); the shell (1) is internally provided with a controller which controls the automatic operation of the biogas fermentation tank.
2. The high-concentration straw biogas fermentation method according to claim 1, characterized in that: at least five groups of threads (43) are arranged on the surface of the connecting shaft (4) at intervals, and each group of threads (43) has at least four turns; the bottom end of the connecting shaft (4) is symmetrically provided with convex blocks (41), and the bottom surface of the shell (1) is provided with a boss (12); the lug boss (12) is provided with a groove, and a limiting groove (13) for limiting the rotation of the lug boss (41) is arranged in the groove; the side wall of the limiting groove (13) is connected with the lug (41) through an arc second spring (42); a slip ring (71) is arranged at the joint of the connecting shaft (4) and the steel wire mesh (7); the slip ring (71) is provided with an internal thread; a gap of 1-3cm is arranged between the outer ring of the steel wire mesh (7) and the inner wall of the shell (1); the position of the limiting fixture block (8) is set to be one fourth of the bottom wall of the shell upwards away from the steel wire mesh (7).
3. The high-concentration straw biogas fermentation method according to claim 2, characterized in that: a limiting clamping block (8) is fixedly mounted on the inner wall of the shell (1), and an included angle between the limiting clamping block (8) and the horizontal plane is 120-145 degrees.
4. The high-concentration straw biogas fermentation method according to claim 3, characterized in that: the outer end of the limiting clamping block (8) is connected with the inner wall of the shell (1) through a torsion spring (81).
5. The high-concentration straw biogas fermentation method according to claim 4, characterized in that: the top end of the limiting clamping block (8) is arranged to be an arc surface.
6. The high-concentration straw biogas fermentation method according to claim 5, characterized in that: the number of the limiting clamping blocks (8) is at least four, the limiting clamping blocks are annularly and uniformly distributed on the inner wall of the shell (1), and each group of limiting clamping blocks (8) at least comprises three limiting pieces (82).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910947262.1A CN110643639A (en) | 2019-09-29 | 2019-09-29 | High-concentration straw biogas fermentation method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910947262.1A CN110643639A (en) | 2019-09-29 | 2019-09-29 | High-concentration straw biogas fermentation method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112690370A (en) * | 2020-12-23 | 2021-04-23 | 刘大康 | Straw biological pig feed |
| CN114538611A (en) * | 2022-04-25 | 2022-05-27 | 山东省食品药品检验研究院 | Sewage treatment plant is used in biological medicine production |
-
2019
- 2019-09-29 CN CN201910947262.1A patent/CN110643639A/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112690370A (en) * | 2020-12-23 | 2021-04-23 | 刘大康 | Straw biological pig feed |
| CN114538611A (en) * | 2022-04-25 | 2022-05-27 | 山东省食品药品检验研究院 | Sewage treatment plant is used in biological medicine production |
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Application publication date: 20200103 |