CN107475081B

CN107475081B - Biogas generation control method and system

Info

Publication number: CN107475081B
Application number: CN201710673843.1A
Authority: CN
Inventors: 张军; 王古超; 汤红梅; 李宪华; 张泽宇; 赵义; 黎俊楠; 袁翔; 陆俊峰; 张继明
Original assignee: Anhui University of Science and Technology
Current assignee: Anhui University of Science and Technology
Priority date: 2017-08-09
Filing date: 2017-08-09
Publication date: 2023-07-04
Anticipated expiration: 2037-08-09
Also published as: CN107475081A

Abstract

The invention relates to a biogas generation control method and system, wherein the system comprises a pretreatment system, a feeding system, an exhaust system, a heating system, a checking system, a liquid discharging system, a deslagging system A, a deslagging system B and the like for biogas raw materials; the biogas raw material pretreatment system comprises the steps of precipitation, mixing, dosing and neutralization of raw materials, and the pretreatment of the biogas raw materials is completed in a pretreatment tank; the biogas generation system designed by the invention adopts high-temperature fermentation, and a first-stage biogas anaerobic generation device, a second-stage first biogas anaerobic generation device, a second-stage second biogas anaerobic generation device and a second-stage third biogas anaerobic generation device which are adopted are all provided with stirring systems; the invention has simple structure, each biogas anaerobic generating device generates biogas in an anaerobic environment by heating the biogas generating device by the heating station, and a set of stirring device can fully ferment biogas materials, so that the system can ferment at high temperature and the biogas production efficiency is improved.

Description

Biogas generation control method and system

Technical Field

The invention relates to the technical field of biogas processing, in particular to a biogas generation control method and system.

Background

The biogas fermentation is a complex microbiological process, the number of microorganisms participating in the fermentation is huge and various, the activity rule, the survival condition and the action of various microorganisms participating in the biogas fermentation are known, a biogas digester is built according to the living condition and the activity rule requirements of the microorganisms, fermentation raw materials are collected and daily management is carried out, so that various microorganisms participating in the fermentation can obtain the optimal growth condition, more gas production and biogas fertilizers can be obtained, and the production and living needs are met.

Biogas fermentation is also called anaerobic digestion, which refers to the process of decomposing and converting various organic matters such as human and animal feces, straw, sewage and the like by various biogas fermentation microorganisms under the anaerobic (without oxygen) condition in a closed biogas tank to finally generate biogas. In this process, microorganisms are the most active factors, and they decompose and convert various solid or dissolved complex organic matters according to the respective nutritional requirements, so as to finally generate biogas.

In the existing biogas generation system, normal-temperature fermentation or medium-temperature fermentation is generally adopted because of the limitation of conditions, the temperature of a biogas digester is low in winter, and the gas production is low, so that the biogas generation system designed by the invention adopts high-temperature fermentation, and a stirring system and a heating system are additionally arranged in a primary biogas anaerobic generation device (109), a secondary first biogas anaerobic generation device (101), a secondary second biogas anaerobic generation device (102) and a secondary third biogas anaerobic generation device (103);

In order to fully play a role of biogas materials, the invention discloses a biogas generation control method and a biogas generation control system. The invention heats through the heating station and is provided with a set of stirring device, so that the biogas material can be fully fermented, and the biogas production efficiency is improved.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provides a biogas generation control method and system.

The invention is realized by the following technical scheme:

as a preferable technical scheme of the invention, the system adopted by the biogas generation control method comprises a pretreatment system (90) of biogas raw materials, a feeding system (91), an exhaust system (92), a heating system (93), a checking system (94), a liquid discharging system (95), a slag discharging system A (96), a slag discharging system B (97) and the like; the biogas raw material pretreatment system (90) comprises the steps of precipitation, mixing, dosing and neutralization of raw materials, and the pretreatment of the biogas raw materials is completed in a pretreatment tank (100);

the first stirring assembly (4) comprises a first driving roller (6), a first Y-shaped connecting frame (8), a first crushing assembly A (20), a second crushing assembly A (21), a third crushing assembly A (22), a fourth crushing assembly A (23), a fifth crushing assembly A (24), a sixth crushing assembly A (25), a first short shaft A (26), a second short shaft A (27), a third short shaft A (28), a fourth short shaft A (29), a fifth short shaft A (30), a sixth short shaft A (31), a first flat key (32) and a first motor shaft (33); the first driving roller (6) is connected with a first motor shaft (33) through a first flat key (32), and the first Y-shaped connecting frame (8) is fixedly connected to the first driving roller (6);

As a preferable technical scheme of the invention, the second stirring assembly (5) comprises a second driving roller (7), a second Y-shaped connecting frame (9), a first crushing assembly B (40), a second crushing assembly B (41), a third crushing assembly B (42), a fourth crushing assembly B (43), a fifth crushing assembly B (44), a sixth crushing assembly B (45), a first short shaft B (46), a second short shaft B (47), a third short shaft B (48), a fourth short shaft B (49), a fifth short shaft B (50), a sixth short shaft B (51), a second flat key (52) and a second motor shaft (53); the second driving roller (7) is connected with a second motor shaft (53) through a second flat key (52), and the second Y-shaped connecting frame (9) is fixedly connected to the second driving roller (7);

as a preferred technical scheme of the invention, the first crushing assembly A (20) is arranged at the position A of the first Y-shaped connecting frame (8) through a first short shaft A (26), and a rotating piece of the first crushing assembly A (20) can rotate around the first short shaft A (26); the second crushing assembly A (21) is arranged at the position B of the first Y-shaped connecting frame (8) through a second short shaft A (27), and a rotating piece of the second crushing assembly A (21) can rotate around the second short shaft A (27); the third crushing assembly A (22) is arranged at the position C of the first Y-shaped connecting frame (8) through a third short shaft A (28), and a rotating piece of the third crushing assembly A (22) can rotate around the third short shaft A (28); the fourth crushing assembly A (23) is arranged at the position D of the first Y-shaped connecting frame (8) through a fourth short shaft A (29), and a rotating piece of the fourth crushing assembly (23) A can rotate around the fourth short shaft A (29); the fifth crushing assembly A (24) is arranged at the position E of the first Y-shaped connecting frame (8) through a fifth short shaft A (30), and a rotating piece of the fifth crushing assembly A (24) can rotate around the fifth short shaft A (30); the sixth crushing assembly A (25) is arranged at the position F of the first Y-shaped connecting frame (8) through a sixth short shaft A (31), and a rotating piece of the sixth crushing assembly A (25) can rotate around the sixth short shaft A (31);

As a preferred technical scheme of the invention, the first crushing assembly B (40) is arranged at the position a of the second Y-shaped connecting frame (9) through a first short shaft B (46), and a rotating piece of the first crushing assembly B (40) can rotate around the first short shaft B (46); the eighth crushing assembly B (41) is arranged at the position B of the second Y-shaped connecting frame (9) through a second short shaft B (47), and a rotating piece of the second crushing assembly B (41) can rotate around the second short shaft B (47); the third crushing assembly B (42) is arranged at the position c of the second Y-shaped connecting frame (9) through a third short shaft B (48), and a rotating piece of the third crushing assembly B (42) can rotate around the third short shaft B (48); the fourth crushing assembly B (43) is arranged at the position d of the second Y-shaped connecting frame (9) through a fourth short shaft B (49), and a rotating piece of the fourth crushing assembly B (43) can rotate around the fourth short shaft B (49); the fifth crushing assembly B (44) is arranged at the position e of the second Y-shaped connecting frame (9) through a fifth short shaft B (50), and a rotating piece of the fifth crushing assembly B (44) can rotate around the fifth short shaft B (50); the sixth crushing assembly B (45) is arranged at the position f of the second Y-shaped connecting frame (9) through a sixth short shaft B (51), and a rotating piece of the sixth crushing assembly B (45) can rotate around the sixth short shaft B (51);

compared with the prior art, the invention has the beneficial effects that: the invention has simple structure, reasonable design and high methane fermentation efficiency, and comprises the following steps: a pretreatment system (90), a feeding system (91), an exhaust system (92), a heating system (93), a checking system (94), a liquid discharging system (95), a slag discharging system A (96), a slag discharging system B (97) and the like.

According to the invention, the first-stage biogas anaerobic generating device (109), the second-stage first biogas anaerobic generating device (101), the second-stage second biogas anaerobic generating device (102) and the second-stage third biogas anaerobic generating device (103) are designed, and the stirring assembly, the heating system and the detection system are designed, so that biogas materials are contacted more fully, fermentation can be performed at high temperature, and biogas production efficiency of biogas is improved.

Drawings

Fig. 1 is: a schematic diagram of a biogas generation system, fig. 2 is: a schematic diagram of a primary feed system (98), fig. 3 is: a schematic diagram of a secondary feed system (99), fig. 4 is: a schematic diagram of a biogas heating system (93), fig. 5 is: a schematic diagram of a biogas exhaust system (92), fig. 6 is: schematic diagram of biogas drainage system (95), fig. 7 is: schematic diagram of biogas residue removal system a (96), fig. 8 is: schematic diagram of biogas residue removal system B (97), fig. 9 is: a schematic diagram of a biogas inspection system (94), diagram 10 is: the schematic diagram of the second-stage first biogas anaerobic regenerating device A is shown in FIG. 11: a schematic structural diagram of a first stirring assembly, fig. 12 is: a second stirring assembly structure schematic diagram.

1. A housing; 2. sealing the cover plate; 3. a charging barrel; 4. a first stirring assembly; 5. a second stirring assembly; 6. a first driving roller; 7. a second driving roller; 8. a first Y-shaped connecting frame; 9. a second Y-shaped connecting frame; 10. a heat preservation layer; 11. an O-shaped sealing ring; 12. heating pipes; 13. a slag discharging cavity; 14. self-moving trolley; 15. a feed pump; 20. a first crushing assembly; 21. a second crushing assembly a; 22. a third crushing assembly a; 23. a fourth crushing assembly a; 24. a fifth crushing assembly a; 25. a sixth crushing assembly a; 26. a first minor axis a; 27. a second minor axis A; 28. a third minor axis A; 29. a fourth minor axis A; 30. a fifth minor axis A; 31. a sixth minor axis a; 32. a first flat key; 33. a first motor shaft; 39. a methane generation cabin; 40. a first crushing assembly B; 41. a second crushing assembly B; 42. a third crushing assembly B; 43. a fourth crushing assembly B; 44. a fifth crushing assembly B; 45. a sixth crushing assembly B; 46. a first minor axis B; 47. a second minor axis B; 48. a third minor axis B; 49. a fourth minor axis B; 50. a fifth minor axis B; 51. a sixth minor axis B; 52. a second flat key; 53. a second motor shaft; 60. a second-stage first exhaust port; 61. a second-stage first biogas slurry outlet; 62. a second-stage first feed inlet; 63. a second-stage first slag discharge port A; 64. a second-stage first slag discharge port B; 90. a pretreatment system; 91. a feeding system; 92. an exhaust system; 93. a heating system; 94. an inspection system; 95. a liquid discharge system; 96. a slag discharging system A; 97. a slag discharging system B; 98. a primary feeding system; 99. a secondary feeding system; 100. a pretreatment pool; 101. a second-stage first biogas anaerobic generating device; 102. a second-stage second biogas anaerobic generating device; 103. a second-stage third biogas anaerobic generating device; 104. a biogas purifying and purifying system; 105. a biogas storage tank; 106. a biogas slurry pond; 107. a biogas residue pool; 108. a heating station; 109. a first-stage biogas anaerobic generating device; 110. a first transfer pump; 111. a second transfer pump; 112. heating the metering pump; 113. a primary feed valve; 115. a first biogas residue discharging pump A; 116. a second biogas residue discharge pump A; 117. a third biogas residue discharging pump A; 120. a first feed valve; 121. a second feed valve; 122. a third feed valve; 123. a first exhaust valve; 124. a second exhaust valve; 125. a third exhaust valve; 126. a fourth exhaust valve; 127. a second heat supply inlet valve; 128. a third heat supply water inlet valve; 129. a fourth heat supply water inlet valve; 130. a first biogas residue discharging valve A; 131. a second biogas residue discharging valve A; 132. a third biogas residue discharging valve A; 133. a second heating water return valve; 134. a third heat supply water return valve; 135. a fourth heating water return valve; 139. a second biogas slurry discharge valve; 140. a third biogas slurry discharging valve; 141. a fourth biogas slurry discharging valve; 142. a first heat supply inlet valve; 143. a first heating water return valve; 144. a primary slag discharging valve A; 145. a primary slag discharging valve B; 146. a first biogas slurry discharge valve; 147. a temperature detection system; 148. the biogas slurry concentration detection system; 152. a first temperature sensor; 153. a second temperature sensor; 154. a third temperature sensor; 155. a fourth temperature sensor; 156. a first manual switching valve; 157. a second manual switching valve; 158. a third manual switching valve; 159. a fourth manual switch valve (159).

Detailed Description

The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.

Please refer to fig. 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12.

The system adopted by the biogas generation control method comprises a pretreatment system (90), a feeding system (91), an exhaust system (92), a heating system (93), a checking system (94), a liquid discharging system (95), a slag discharging system A (96), a slag discharging system B (97) and the like; the biogas raw material pretreatment system (90) comprises the steps of precipitation, mixing, dosing and neutralization of raw materials, and the pretreatment of the biogas raw materials is completed in a pretreatment tank (100);

the feed system (91) comprises a primary feed system (98) and a secondary feed system (99), the primary feed system (98) comprising: the device comprises a pretreatment tank (100), a first delivery pump (110), a first-stage feeding valve (113) and a first-stage biogas anaerobic generating device (109); the outlet of the pretreatment tank (100) is connected with the inlet of the primary biogas anaerobic generating device (109) through a first delivery pump (110), and a primary feeding valve (113);

The secondary feed system (99) comprises: a first-stage biogas anaerobic generating device (109), a second-stage first biogas anaerobic generating device (101), a second-stage second biogas anaerobic generating device (102), a second-stage third biogas anaerobic generating device (103), a first-stage slag discharging valve A (144), a first-stage slag discharging valve B (145), a second conveying pump (111), a first feeding valve (120), a second feeding valve (121) and a third feeding valve (122);

the slag discharge port B of the primary biogas anaerobic generating device (109) is respectively connected with the first feeding valve (120) and the feeding port of the secondary first biogas anaerobic generating device (101) through the primary slag discharge valve B (145) and the second conveying pump (111); the slag discharge port B of the primary biogas anaerobic generating device (109) is respectively connected with the second feeding valve (121) and the feeding port of the secondary second biogas anaerobic generating device (102) through the primary slag discharge valve B (145) and the second conveying pump (111); the slag discharge port B of the primary biogas anaerobic generating device (109) is respectively connected with the third feeding valve (122) and the feeding port of the secondary third biogas anaerobic generating device (101) through the primary slag discharge valve B (145) and the second conveying pump (111);

the exhaust system (92) includes: a first-stage biogas anaerobic generating device (109), a second-stage first biogas anaerobic generating device (101), a second-stage second biogas anaerobic generating device (102), a second-stage third biogas anaerobic generating device (103), a biogas purifying and purifying system (104), a biogas storage tank (105), a first exhaust valve (123), a second exhaust valve (124), a third exhaust valve (125) and a fourth exhaust valve (126); the exhaust port of the first-stage biogas anaerobic generating device (109) is connected with an exhaust system (92) through a first exhaust valve (123); the exhaust port of the second-stage first biogas anaerobic generating device (101) is connected with the exhaust system (92) through a second exhaust valve (124), the exhaust port of the second-stage second biogas anaerobic generating device (102) is connected with the exhaust system (92) through a third exhaust valve (125), and the exhaust port of the second-stage third biogas anaerobic generating device (103) is connected with the exhaust system (92) through a fourth exhaust valve (126);

The heating system (93) includes: the system comprises a heating station (108), a heating metering pump (112), a first-stage biogas anaerobic generating device (109), a second-stage first biogas anaerobic generating device (101), a second-stage second biogas anaerobic generating device (102), a second-stage third biogas anaerobic generating device (103), a first heat supply water inlet valve (142), a first heat supply water return valve (143), a second heat supply water inlet valve (127), a third heat supply water inlet valve (128), a fourth heat supply water inlet valve (129), a second heat supply water return valve (133), a third heat supply water return valve (134) and a fourth heat supply water return valve (135); the hot water of the heating station (108) is respectively connected with a first-stage biogas anaerobic generating device (109), a second-stage first biogas anaerobic generating device (101), a second-stage second biogas anaerobic generating device (102) and an inlet of a heating pipe of a second-stage third biogas anaerobic generating device (103) through a heating metering pump (112); the water return port of the heating pipe is connected with a water return pipe of the heating system (93); the inlet and outlet of a heating pipe of the primary biogas anaerobic generating device (109) are respectively provided with a first heat supply water inlet valve (142) and a first heat supply water return valve (143); the inlet and outlet of the heating pipe of the second-stage first biogas anaerobic generating device (101) are respectively provided with a second heat supply water inlet valve (127) and a second heat supply water return valve (133); the inlet and outlet of the heating pipe of the second-stage second biogas anaerobic generating device (102) are respectively provided with a third heat supply water inlet valve (128) and a third heat supply water return valve (134); a fourth heat supply water inlet valve (129) and a fourth heat supply water return valve (135) are respectively arranged at the inlet and the outlet of a heating pipe of the second-stage third biogas anaerobic generating device (103);

The inspection system (94) includes: a temperature detection system (147) and a biogas slurry concentration detection system (148), wherein the temperature detection system (147) comprises a first temperature sensor (152), a second temperature sensor (153), a third temperature sensor (154) and a fourth temperature sensor (155); a first temperature sensor (152) is arranged at the upper part of an inner cavity shell of the first-stage biogas anaerobic generating device (109), a second temperature sensor (153) is arranged at the upper part of an inner cavity shell of the second-stage first biogas anaerobic generating device (101), a third temperature sensor (154) is arranged at the upper part of an inner cavity shell of the second-stage second biogas anaerobic generating device (102), and a fourth temperature sensor (155) is arranged at the upper part of an inner cavity shell of the second-stage third biogas anaerobic generating device (103);

the biogas slurry concentration detection system (148) comprises a first manual switch valve (156), a second manual switch valve (157), a third manual switch valve (158) and a fourth manual switch valve (159); the first manual switch valve (156) is communicated with a liquid outlet of the primary biogas anaerobic generating device (109) through a tee joint; the second manual switch valve (157) is communicated with a liquid outlet of the second-stage first biogas anaerobic generating device (101) through a tee joint; the third manual switch valve (158) is communicated with a liquid outlet of the second-stage second biogas anaerobic generating device (102) through a tee joint; the fourth manual switch valve (159) is communicated with a liquid outlet of the second-stage third biogas anaerobic generating device (103) through a tee joint;

The liquid discharge system (95) includes: the biogas slurry tank (106), the fourth conveying pump (114), the first-stage biogas anaerobic generating device (109), the second-stage first biogas anaerobic generating device (101), the second-stage second biogas anaerobic generating device (102), the second-stage third biogas anaerobic generating device (103), the first biogas slurry discharging valve (146), the second biogas slurry discharging valve (139), the third biogas slurry discharging valve (140) and the fourth biogas slurry discharging valve (141); the biogas slurry discharging ports of the first-stage biogas anaerobic generating device (109), the second-stage first biogas anaerobic generating device (101), the second-stage second biogas anaerobic generating device (102) and the second-stage third biogas anaerobic generating device (103) are respectively connected with a biogas slurry discharging valve system through a first biogas slurry discharging valve (146), a second biogas slurry discharging valve (139), a third biogas slurry discharging valve (140) and a fourth biogas slurry discharging valve (141);

the slag discharging system A (96) comprises: the biogas residue pond (107), a second-stage first biogas anaerobic generating device (101), a second-stage second biogas anaerobic generating device (102), a second-stage third biogas anaerobic generating device (103), a first biogas residue discharging valve A (130), a second biogas residue discharging valve A (131), a third biogas residue discharging valve A (132), a first biogas residue discharging pump A (115), a second biogas residue discharging pump A (116) and a third biogas residue discharging pump A (117); the slag discharge port A of the second-stage first biogas anaerobic generation device (101) is connected with a slag discharge system A (96) through a first biogas residue discharge valve A (130) and a first biogas residue discharge pump A (115) respectively; the slag discharge port A of the second-stage second biogas anaerobic generating device (102) is connected with a slag discharge system A (96) through a second biogas residue discharge valve A (131) and a second biogas residue discharge pump A (116) respectively; the slag discharge port A of the second-stage third biogas anaerobic generating device (103) is connected with a slag discharge system A (96) through a third biogas residue discharge valve A (132) and a third biogas residue discharge pump A (117) respectively;

The slag discharging system B (97) comprises: the biogas residue pond (107), a second-stage first biogas anaerobic generating device (101), a second-stage second biogas anaerobic generating device (102), a second-stage third biogas anaerobic generating device (103), a first biogas residue discharging valve B (136), a second biogas residue discharging valve B (137), a third biogas residue discharging valve B (138), a first biogas residue discharging pump A (115), a second biogas residue discharging pump A (116) and a third biogas residue discharging pump A (117); the slag discharge port B of the second-stage first biogas anaerobic generation device (101) is respectively connected with a slag discharge system A (96) through a first biogas residue discharge valve B (136) and a first biogas residue discharge pump A (115); the slag discharge port B of the second-stage second biogas anaerobic generating device (102) is respectively connected with a slag discharge system A (96) through a second biogas residue discharge valve B (137) and a second biogas residue discharge pump A (116); the slag discharge port B of the second-stage third biogas anaerobic generating device (103) is respectively connected with a slag discharge system A (96) through a third biogas residue discharge valve B (138) and a third biogas residue discharge pump A (117);

the first-stage biogas anaerobic generating device (109), the second-stage first biogas anaerobic generating device (101), the second-stage second biogas anaerobic generating device (102) and the second-stage third biogas anaerobic generating device (103) have the same structure, and the second-stage first biogas anaerobic generating device (101) is taken as an example for illustration;

The secondary first biogas anaerobic generation device (101) comprises a shell (1), an insulating layer (10) is packaged outside the shell (1), a sealing cover plate (2) is arranged at the upper end of the shell (1), the sealing cover plate (2) is connected with the shell (1) through a bolt assembly, the top of the shell (1) is sealed with the sealing cover plate (2) through an O-shaped sealing ring (11), a biogas generation cabin (39) is formed in the middle of the shell (1), and a slag discharging cavity (13) is formed in the lower portion of the shell (1); the top of the shell (1) is provided with a second-stage first exhaust port (60), and the second-stage first exhaust port (60) is connected with an exhaust system (92) through an exhaust valve (124); the middle left part of the shell (1) is provided with a second-stage first feeding hole (62), and the second-stage first feeding hole (62) is connected with a second-stage feeding system (99) through a feeding valve (120); the upper part of the shell (1) is provided with a second temperature sensor (153), the middle right part of the shell (1) is provided with a second-stage first biogas slurry discharging port (61), the second-stage first biogas slurry discharging port (61) is communicated with a biogas slurry discharging valve (139) and a liquid discharging system (95) through one end of a tee joint, and the second-stage first biogas slurry discharging port (61) is communicated with a second manual biogas slurry discharging valve (157) through the other end of the tee joint; the bottom of the shell (1) is provided with a heating pipe (12), the heating pipe (12) is fixed at the bottom of the shell (1), a water inlet of the heating pipe (12) is connected with a water inlet pipe of a heating system (93) through a heating water inlet valve (127), and a water outlet of the heating pipe (12) is connected with a water return pipe of the heating system (93) through a heating water return valve (133); the bottom of the shell (1) is provided with a slag discharging cavity (13), the bottom of the slag discharging cavity (13) is provided with a second-stage first slag discharging port A (63) and a slag discharging port B (64), the second-stage first slag discharging port A (63) is connected with a slag discharging system A (96) through a first slag discharging valve A (130), and the slag discharging port B (64) is connected with a slag discharging system B (97) through a slag discharging valve B (136);

A first stirring assembly (4) is arranged at one side of the interior of the shell (1), and a second stirring assembly (5) is arranged at the other side of the interior of the shell;

the second stirring assembly (5) comprises a second driving roller (7), a second Y-shaped connecting frame (9), a first crushing assembly B (40), a second crushing assembly B (41), a third crushing assembly B (42), a fourth crushing assembly B (43), a fifth crushing assembly B (44), a sixth crushing assembly B (45), a first short shaft B (46), a second short shaft B (47), a third short shaft B (48), a fourth short shaft B (49), a fifth short shaft B (50), a sixth short shaft B (51), a second flat key (52) and a second motor shaft (53); the second driving roller (7) is connected with a second motor shaft (53) through a second flat key (52), and the second Y-shaped connecting frame (9) is fixedly connected to the second driving roller (7);

The first crushing assembly A (20) is arranged at the position A of the first Y-shaped connecting frame (8) through a first short shaft A (26), and a rotating piece of the first crushing assembly A (20) can rotate around the first short shaft A (26); the second crushing assembly A (21) is arranged at the position B of the first Y-shaped connecting frame (8) through a second short shaft A (27), and a rotating piece of the second crushing assembly A (21) can rotate around the second short shaft A (27); the third crushing assembly A (22) is arranged at the position C of the first Y-shaped connecting frame (8) through a third short shaft A (28), and a rotating piece of the third crushing assembly A (22) can rotate around the third short shaft A (28); the fourth crushing assembly A (23) is arranged at the position D of the first Y-shaped connecting frame (8) through a fourth short shaft A (29), and a rotating piece of the fourth crushing assembly (23) A can rotate around the fourth short shaft A (29); the fifth crushing assembly A (24) is arranged at the position E of the first Y-shaped connecting frame (8) through a fifth short shaft A (30), and a rotating piece of the fifth crushing assembly A (24) can rotate around the fifth short shaft A (30); the sixth crushing assembly A (25) is arranged at the position F of the first Y-shaped connecting frame (8) through a sixth short shaft A (31), and a rotating piece of the sixth crushing assembly A (25) can rotate around the sixth short shaft A (31);

the first crushing assembly B (40) is arranged at the position a of the second Y-shaped connecting frame (9) through a first short shaft B (46), and a rotating piece of the first crushing assembly B (40) can rotate around the first short shaft B (46); the eighth crushing assembly B (41) is arranged at the position B of the second Y-shaped connecting frame (9) through a second short shaft B (47), and a rotating piece of the second crushing assembly B (41) can rotate around the second short shaft B (47); the third crushing assembly B (42) is arranged at the position c of the second Y-shaped connecting frame (9) through a third short shaft B (48), and a rotating piece of the third crushing assembly B (42) can rotate around the third short shaft B (48); the fourth crushing assembly B (43) is arranged at the position d of the second Y-shaped connecting frame (9) through a fourth short shaft B (49), and a rotating piece of the fourth crushing assembly B (43) can rotate around the fourth short shaft B (49); the fifth crushing assembly B (44) is arranged at the position e of the second Y-shaped connecting frame (9) through a fifth short shaft B (50), and a rotating piece of the fifth crushing assembly B (44) can rotate around the fifth short shaft B (50); the sixth crushing assembly B (45) is arranged at the position f of the second Y-shaped connecting frame (9) through a sixth short shaft B (51), and a rotating piece of the sixth crushing assembly B (45) can rotate around the sixth short shaft B (51);

The primary biogas anaerobic generating device (109), the secondary first biogas anaerobic generating device (101), the secondary second biogas anaerobic generating device (102) and the secondary third biogas anaerobic generating device (103) of the biogas generating system are respectively provided with three specifications of 10 tons, 15 tons and 20 tons, and the 15 tons biogas generating system is taken as an example:

the biogas generation control method comprises the following processing steps:

1) The step of adding materials for the first time by the biogas anaerobic generating device:

A. the new biogas head needs to be filled once to inoculate materials, a biogas residue and biogas slurry suction and discharge vehicle is used for conveying 5 tons of biogas fermentation residue water from other biogas stations, the residue water is injected into a pretreatment tank (100), then 10 tons of anaerobic fermentation raw materials are added, the mixture is fully stirred, the PH value is tested, the acidification treatment is carried out, and the PH value of the raw materials is kept within the range of 0.65-0.7;

B. the method comprises the steps that materials are sent into a first-stage biogas anaerobic generation device (109) through a first-stage feeding system (98), the first-stage feeding valve (113) is opened, a first conveying pump (110) is started, the materials in a pretreatment tank (100) are sent into the first-stage biogas anaerobic generation device (109), and after conveying is finished, the first-stage feeding valve (113) is closed; a stirring system of the primary biogas anaerobic generating device (109) is opened to fully stir the materials;

C. Feeding the material from the primary biogas anaerobic generating device (109) to the secondary first biogas anaerobic generating device (101) through the secondary feeding system (99); starting a heating system (93) of the second-stage first biogas anaerobic generating device (101) until the temperature reaches 60 ℃; opening a stirring system of the second-stage first biogas anaerobic generating device (101) to automatically stir the stirring system for 24 times per day for 5 minutes each time;

D. continuously conveying 5 tons of biogas fermentation slag water from other biogas stations, injecting the slag water into a pretreatment tank (100), adding 10 tons of anaerobic fermentation raw materials, fully stirring, testing the pH value, acidizing, and keeping the pH value of the raw materials within the range of 0.65-0.7;

E. the method comprises the steps that materials are sent into a first-stage biogas anaerobic generation device (109) through a first-stage feeding system (98), the first-stage feeding valve (113) is opened, a first conveying pump (110) is started, the materials in a pretreatment tank (100) are sent into the first-stage biogas anaerobic generation device (109), and after conveying is finished, the first-stage feeding valve (113) is closed; a stirring system of the primary biogas anaerobic generating device (109) is opened to fully stir the materials;

F. feeding the material from the first biogas anaerobic generating device (109) to the second biogas anaerobic generating device (102) through the second feeding system (99); starting a heating system (93) of the second-stage second biogas anaerobic generating device (102) until the temperature reaches 60 ℃; opening a stirring system of the second-stage second biogas anaerobic generating device (102), and enabling the stirring system to stir for 24 times each day automatically, wherein each stirring time is 5 minutes;

G. Continuously conveying 5 tons of biogas fermentation slag water from other biogas stations, injecting the slag water into a pretreatment tank (100), adding 10 tons of anaerobic fermentation raw materials, fully stirring, testing the pH value, acidizing, and keeping the pH value of the raw materials within the range of 0.65-0.7;

H. the method comprises the steps that materials are sent into a first-stage biogas anaerobic generation device (109) through a first-stage feeding system (98), the first-stage feeding valve (113) is opened, a first conveying pump (110) is started, the materials in a pretreatment tank (100) are sent into the first-stage biogas anaerobic generation device (109), and after conveying is finished, the first-stage feeding valve (113) is closed; a stirring system of the primary biogas anaerobic generating device (109) is opened to fully stir the materials;

I. feeding the material from the first-stage biogas anaerobic generating device (109) to the second-stage third biogas anaerobic generating device (103) through a second-stage feeding system (99); starting a heating system (93) of the second-stage third biogas anaerobic generating device (103) until the temperature reaches 60 ℃; opening a stirring system of the second-stage third biogas anaerobic generating device (103) to automatically stir the stirring system for 24 times per day for 5 minutes each time;

J. continuously conveying 5 tons of biogas fermentation slag water from other biogas stations, injecting the slag water into a pretreatment tank (100), adding 10 tons of anaerobic fermentation raw materials, fully stirring, testing the pH value, acidizing, and keeping the pH value of the raw materials within the range of 0.65-0.7;

K. The method comprises the steps that materials are sent into a first-stage biogas anaerobic generation device (109) through a first-stage feeding system (98), the first-stage feeding valve (113) is opened, a first conveying pump (110) is started, the materials in a pretreatment tank (100) are sent into the first-stage biogas anaerobic generation device (109), and after conveying is finished, the first-stage feeding valve (113) is closed; a stirring system of the primary biogas anaerobic generating device (109) is opened to fully stir the materials; starting a heating system (93) of a primary biogas anaerobic generating device (109) until the temperature reaches 60 ℃; opening a stirring system of the primary biogas anaerobic generating device (109) to automatically stir the stirring system for 24 times a day for 5 minutes each time;

2) The heating system (93) automatically heats the primary biogas anaerobic generating device (109), the secondary first biogas anaerobic generating device (101), the secondary second biogas anaerobic generating device (102) and the secondary third biogas anaerobic generating device (103) through signals of the first temperature sensor (152), the second temperature sensor (153), the third temperature sensor (154) and the fourth temperature sensor (155), so that the temperatures in the cavities of the primary biogas anaerobic generating device (109), the secondary first biogas anaerobic generating device (101), the secondary second biogas anaerobic generating device (102) and the secondary third biogas anaerobic generating device (103) are controlled within the range of 46-60 ℃;

3) The second manual switch valve (157) is opened once every day, and the concentration and the PH value of the chemical oxygen demand CODcr of the biogas slurry are respectively checked; discharging about 500ml of biogas slurry, and taking a biogas slurry sample; when the concentration of CODcr is less than 500mg/L and the PH value of biogas slurry is more than 7.4, starting a liquid discharge system (95) to discharge the biogas slurry from the second-stage first biogas anaerobic generating device (101); starting a slag discharging system A (96) to discharge biogas residues to a second-stage first biogas anaerobic generating device (101); starting a secondary feeding system (99) to supplement materials for the secondary first biogas anaerobic generating device (101); when the pH value is found to be more than 8 or less than 6, the acid or alkali adding treatment is needed, and the method is as follows: firstly calculating the amount of acid or alkali to be added, adding the required acid or alkali into a feeding barrel (3), opening a self-moving trolley (14) to the vicinity of a second manual switch valve (157) of a second-stage first biogas anaerobic generating device (101), communicating an outlet of a feeding pump (15) and an outlet of the second manual switch valve (157) through a hose, starting the feeding pump (15), and finishing the acid or alkali addition of the second-stage first biogas anaerobic generating device (101) and simultaneously starting a stirring system of the second-stage first biogas anaerobic generating device (101) for 10 minutes;

4) The third manual switch valve (158) is opened once every day to respectively check the concentration and the PH value of the chemical oxygen demand CODcr of the biogas slurry; discharging about 500ml of biogas slurry, and taking a biogas slurry sample; when the concentration of CODcr is less than 500mg/L and the PH value of biogas slurry is more than 7.4, starting a liquid discharge system (95) to discharge the biogas slurry from the second-stage second biogas anaerobic generating device (102); starting a slag discharging system A (96) to discharge biogas residues to a second-stage second biogas anaerobic generating device (102); starting a secondary feeding system (99) to supplement materials for the secondary second biogas anaerobic generating device (102); when the pH value is found to be more than 8 or less than 6, the acid or alkali adding treatment is needed, and the method is as follows: firstly calculating the amount of acid or alkali to be added, adding the required acid or alkali into a feeding barrel (3), opening a self-moving trolley (14) to the vicinity of a third manual switch valve (158) of a second-stage second biogas anaerobic generating device (102), communicating an outlet of a feeding pump (15) and an outlet of the third manual switch valve (158) through a hose, opening the feeding pump (15), completing the acid or alkali addition of the second-stage second biogas anaerobic generating device (102), and simultaneously opening a stirring system of the second-stage second biogas anaerobic generating device (102) for 10 minutes;

5) The third manual switch valve (159) is opened once every day to respectively check the concentration and the PH value of the chemical oxygen demand CODcr of the biogas slurry; discharging about 500ml of biogas slurry, and taking a biogas slurry sample; when the concentration of CODcr is less than 500mg/L and the PH value of biogas slurry is more than 7.4, a liquid discharge system (95) is started to discharge the biogas slurry from the second-stage third biogas anaerobic generating device (103); starting a slag discharging system A (96) to discharge biogas residues to a second-stage third biogas anaerobic generating device (103); starting a secondary feeding system (99) to supplement materials for a secondary third biogas anaerobic generating device (103); when the pH value is found to be more than 8 or less than 6, the acid or alkali adding treatment is needed, and the method is as follows: firstly calculating the amount of acid or alkali to be added, adding the required acid or alkali into a feeding barrel (3), opening a self-moving trolley (14) to the vicinity of a fourth manual switch valve (159) of a second-stage third biogas anaerobic generating device (103), communicating outlets of a feeding pump (15) and the fourth manual switch valve (159) through a hose, opening the feeding pump (15), and completing the acid or alkali addition of the second-stage third biogas anaerobic generating device (103) and simultaneously opening a stirring system of the second-stage third biogas anaerobic generating device (103) for 10 minutes;

6) The secondary first biogas anaerobic generating device (101), the secondary second biogas anaerobic generating device (102) and the secondary third biogas anaerobic generating device (103) are opened with a slag discharging system B (97) once a month, and solid sediment in the secondary first biogas anaerobic generating device (101), the secondary second biogas anaerobic generating device (102) and the secondary third biogas anaerobic generating device (103) is discharged.

The biogas generation control method is characterized by comprising the following steps of: the rotation directions of the first stirring component (4) and the second stirring component (5) are opposite.

The biogas generation control method is characterized by comprising the following steps of: the primary feeding valve (113) is a normally-closed electromagnetic reversing valve; the primary slag discharging valve A (144) and the primary slag discharging valve B (145) are normally closed electromagnetic directional valves; the first feeding valve (120), the second feeding valve (121) and the third feeding valve (122) are normally closed electromagnetic reversing valves; the first exhaust valve (123), the second exhaust valve (124), the third exhaust valve (125) and the fourth exhaust valve (126) are electromagnetic normally open reversing valves; the first heat supply water inlet valve (142), the second heat supply water inlet valve (127), the third heat supply water inlet valve (128), the fourth heat supply water inlet valve (129), the first heat supply water return valve (143), the second heat supply water return valve (133), the third heat supply water return valve (134) and the fourth heat supply water return valve (135) are normally closed electromagnetic reversing valves; the first biogas slurry discharge valve (146), the second biogas slurry discharge valve (139), the third biogas slurry discharge valve (140) and the fourth biogas slurry discharge valve (141) are all normally closed electromagnetic directional valves; the first biogas residue discharging valve A (130), the second biogas residue discharging valve A (131) and the third biogas residue discharging valve A (132) are normally closed electromagnetic directional valves; the first biogas residue discharging valve B (136), the second biogas residue discharging valve B (137) and the third biogas residue discharging valve B (138) are normally closed electromagnetic directional valves.

The device adopted by the biogas generation control method comprises a pretreatment system (90), a feeding system (91), an exhaust system (92), a heating system (93), a checking system (94), a liquid discharging system (95), a slag discharging system A (96), a slag discharging system B (97) and the like of biogas raw materials; the biogas raw material pretreatment system (90) comprises the steps of precipitation, mixing, dosing and neutralization of raw materials, and the pretreatment of the biogas raw materials is completed in a pretreatment tank (100);

The slag discharge port B of the primary biogas anaerobic generating device (109) is respectively connected with the first feeding valve (120) and the feeding port of the secondary first biogas anaerobic generating device (101) through the primary slag discharge valve B (145) and the second conveying pump (111); the slag discharge port B of the primary biogas anaerobic generating device (109) is respectively connected with the second feeding valve (121) and the feeding port of the secondary second biogas anaerobic generating device (102) through the primary slag discharge valve B (145) and the second conveying pump (111); the slag discharge port B of the primary biogas anaerobic generating device (109) is respectively connected with the third feeding valve (122) and the feeding port of the secondary third biogas anaerobic generating device (103) through the primary slag discharge valve B (145) and the second conveying pump (111);

The secondary first biogas anaerobic generation device (101) comprises a shell (1), an insulating layer (10) is packaged outside the shell (1), a sealing cover plate (2) is arranged at the upper end of the shell (1), the sealing cover plate (2) is connected with the shell (1) through a bolt assembly, the top of the shell (1) is sealed with the sealing cover plate (2) through an O-shaped sealing ring (11), a biogas generation cabin (39) is formed in the middle of the shell (1), and a slag discharging cavity (13) is formed in the lower portion of the shell (1); the top of the shell (1) is provided with a second-stage first exhaust port (60), and the second-stage first exhaust port (60) is connected with an exhaust system (92) through an exhaust valve (124); the middle left part of the shell (1) is provided with a second-stage first feeding hole (62), and the second-stage first feeding hole (62) is connected with a feeding system through a feeding valve (120); the upper part of the shell (1) is provided with a second temperature sensor (153), the middle right part of the shell (1) is provided with a second-stage first biogas slurry discharging port (61), the second-stage first biogas slurry discharging port (61) is communicated with a biogas slurry discharging valve (139) and a liquid discharging system (95) through one end of a tee joint, and the second-stage first biogas slurry discharging port (61) is communicated with a second manual biogas slurry discharging valve (157) through the other end of the tee joint; the bottom of the shell (1) is provided with a heating pipe (12), the heating pipe (12) is fixed at the bottom of the shell (1), a water inlet of the heating pipe (12) is connected with a water inlet pipe of a heating system (93) through a heating water inlet valve (127), and a water outlet of the heating pipe (12) is connected with a water return pipe of the heating system (93) through a heating water return valve (133); the bottom of the shell (1) is provided with a slag discharging cavity (13), the bottom of the slag discharging cavity (13) is provided with a second-stage first slag discharging port A (63) and a slag discharging port B (64), the second-stage first slag discharging port A (63) is connected with a slag discharging system A (96) through a first slag discharging valve A (130), and the slag discharging port B (64) is connected with a slag discharging system B (97) through a slag discharging valve B (136);

the first crushing assembly B (40) is arranged at the position a of the second Y-shaped connecting frame (9) through a first short shaft B (46), and a rotating piece of the first crushing assembly B (40) can rotate around the first short shaft B (46); the eighth crushing assembly B (41) is arranged at the position B of the second Y-shaped connecting frame (9) through a second short shaft B (47), and a rotating piece of the second crushing assembly B (41) can rotate around the second short shaft B (47); the third crushing assembly B (42) is arranged at the position c of the second Y-shaped connecting frame (9) through a third short shaft B (48), and a rotating piece of the third crushing assembly B (42) can rotate around the third short shaft B (48); the fourth crushing assembly B (43) is arranged at the position d of the second Y-shaped connecting frame (9) through a fourth short shaft B (49), and a rotating piece of the fourth crushing assembly B (43) can rotate around the fourth short shaft B (49); the fifth crushing assembly B (44) is arranged at the position e of the second Y-shaped connecting frame (9) through a fifth short shaft B (50), and a rotating piece of the fifth crushing assembly B (44) can rotate around the fifth short shaft B (50); the sixth crushing assembly B (45) is mounted at a position f of the second Y-shaped connecting frame (9) by a sixth stub shaft B (51), the turning member of the sixth crushing assembly B (45) being rotatable about the sixth stub shaft B (51).

The biogas generation system is characterized in that: the rotation directions of the first stirring component (4) and the second stirring component (5) are opposite.

The biogas generation system is characterized in that: the primary feeding valve (113) is a normally-closed electromagnetic reversing valve; the primary slag discharging valve A (144) and the primary slag discharging valve B (145) are normally closed electromagnetic directional valves; the first feeding valve (120), the second feeding valve (121) and the third feeding valve (122) are normally closed electromagnetic reversing valves; the first exhaust valve (123), the second exhaust valve (124), the third exhaust valve (125) and the fourth exhaust valve (126) are electromagnetic normally open reversing valves; the first heat supply water inlet valve (142), the second heat supply water inlet valve (127), the third heat supply water inlet valve (128), the fourth heat supply water inlet valve (129), the first heat supply water return valve (143), the second heat supply water return valve (133), the third heat supply water return valve (134) and the fourth heat supply water return valve (135) are normally closed electromagnetic reversing valves; the first biogas slurry discharge valve (146), the second biogas slurry discharge valve (139), the third biogas slurry discharge valve (140) and the fourth biogas slurry discharge valve (141) are all normally closed electromagnetic directional valves; the first biogas residue discharging valve A (130), the second biogas residue discharging valve A (131) and the third biogas residue discharging valve A (132) are normally closed electromagnetic directional valves; the first biogas residue discharging valve B (136), the second biogas residue discharging valve B (137) and the third biogas residue discharging valve B (138) are normally closed electromagnetic directional valves.

The foregoing has shown and described the basic principles, principal features and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present invention, and various changes and modifications may be made without departing from the spirit and scope of the invention, which is defined in the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. A biogas generation control method is characterized in that: the system adopted by the biogas generation control method comprises a pretreatment system (90), a feeding system (91), an exhaust system (92), a heating system (93), a checking system (94), a liquid discharging system (95), a slag discharging system A (96) and a slag discharging system B (97) of biogas raw materials; the biogas raw material pretreatment system (90) comprises the steps of precipitation, mixing, dosing and neutralization of raw materials, and the pretreatment of the biogas raw materials is completed in a pretreatment tank (100);

the slag discharge port B of the primary biogas anaerobic generating device (109) is respectively connected with the first feeding valve (120) and the feeding port of the secondary first biogas anaerobic generating device (101) through the primary slag discharge valve B (145) and the second conveying pump (111); the slag discharge port B of the primary biogas anaerobic generating device (109) is respectively connected with the second feeding valve (121) and the feeding port of the secondary second biogas anaerobic generating device (102) through the primary slag discharge valve B (145) and the second conveying pump (111); the slag discharge port B of the primary biogas anaerobic generating device (109) is respectively connected with the feed ports of the first feed valve (120) and the secondary third biogas anaerobic generating device (103) through a primary slag discharge valve B (145) and a second feed pump (111);

The secondary first biogas anaerobic generation device (101) comprises a shell (1), an insulating layer (10) is packaged outside the shell (1), a sealing cover plate (2) is arranged at the upper end of the shell (1), the sealing cover plate (2) is connected with the shell (1) through a bolt assembly, the top of the shell (1) is sealed with the sealing cover plate (2) through an O-shaped sealing ring (11), a biogas generation cabin (39) is formed in the middle of the shell (1), and a slag discharging cavity (13) is formed in the lower portion of the shell (1); the top of the shell (1) is provided with a second-stage first exhaust port (60), and the second-stage first exhaust port (60) is connected with an exhaust system (92) through a second exhaust valve (124); the middle left part of the shell (1) is provided with a second-stage first feeding hole (62), and the second-stage first feeding hole (62) is connected with a second-stage feeding system (99) through a first feeding valve (120); the upper part of the shell (1) is provided with a second temperature sensor (153), the middle right part of the shell (1) is provided with a second-stage first biogas slurry outlet (61), the second-stage first biogas slurry outlet (61) is communicated with a second biogas slurry outlet valve (139) and a liquid discharge system (95) through one end of a tee joint, and the second-stage first biogas slurry outlet (61) is communicated with a second manual switch valve (157) through the other end of the tee joint; the bottom of the shell (1) is provided with a heating pipe (12), the heating pipe (12) is fixed at the bottom of the shell (1), a water inlet of the heating pipe (12) is connected with a water inlet pipe of a heating system (93) through a second heat supply water inlet valve (127), and a water outlet of the heating pipe (12) is connected with a water return pipe of the heating system (93) through a second heat supply water return valve (133); the bottom of the shell (1) is provided with a slag discharging cavity (13), the bottom of the slag discharging cavity (13) is provided with a second-stage first slag discharging port A (63) and a slag discharging port B (64), the second-stage first slag discharging port A (63) is connected with a slag discharging system A (96) through a first biogas residue discharging valve A (130), and the slag discharging port B (64) is connected with a slag discharging system B (97) through a first biogas residue discharging valve B (136);

The first crushing assembly A (20) is arranged at the position A of the first Y-shaped connecting frame (8) through a first short shaft A (26), and a rotating piece of the first crushing assembly A (20) can rotate around the first short shaft A (26); the second crushing assembly A (21) is arranged at the position B of the first Y-shaped connecting frame (8) through a second short shaft A (27), and a rotating piece of the second crushing assembly A (21) can rotate around the second short shaft A (27); the third crushing assembly A (22) is arranged at the position C of the first Y-shaped connecting frame (8) through a third short shaft A (28), and a rotating piece of the third crushing assembly A (22) can rotate around the third short shaft A (28); the fourth crushing assembly A (23) is arranged at the position D of the first Y-shaped connecting frame (8) through a fourth short shaft A (29), and a rotating piece of the fourth crushing assembly A (23) can rotate around the fourth short shaft A (29); the fifth crushing assembly A (24) is arranged at the position E of the first Y-shaped connecting frame (8) through a fifth short shaft A (30), and a rotating piece of the fifth crushing assembly A (24) can rotate around the fifth short shaft A (30); the sixth crushing assembly A (25) is arranged at the position F of the first Y-shaped connecting frame (8) through a sixth short shaft A (31), and a rotating piece of the sixth crushing assembly A (25) can rotate around the sixth short shaft A (31);

the first crushing assembly B (40) is arranged at the position a of the second Y-shaped connecting frame (9) through a first short shaft B (46), and a rotating piece of the first crushing assembly B (40) can rotate around the first short shaft B (46); the second crushing assembly B (41) is arranged at the position B of the second Y-shaped connecting frame (9) through a second short shaft B (47), and a rotating piece of the second crushing assembly B (41) can rotate around the second short shaft B (47); the third crushing assembly B (42) is arranged at the position c of the second Y-shaped connecting frame (9) through a third short shaft B (48), and a rotating piece of the third crushing assembly B (42) can rotate around the third short shaft B (48); the fourth crushing assembly B (43) is arranged at the position d of the second Y-shaped connecting frame (9) through a fourth short shaft B (49), and a rotating piece of the fourth crushing assembly B (43) can rotate around the fourth short shaft B (49); the fifth crushing assembly B (44) is arranged at the position e of the second Y-shaped connecting frame (9) through a fifth short shaft B (50), and a rotating piece of the fifth crushing assembly B (44) can rotate around the fifth short shaft B (50); the sixth crushing assembly B (45) is arranged at the position f of the second Y-shaped connecting frame (9) through a sixth short shaft B (51), and a rotating piece of the sixth crushing assembly B (45) can rotate around the sixth short shaft B (51);

The loading tonnage of a primary biogas anaerobic generating device (109), a secondary first biogas anaerobic generating device (101), a secondary second biogas anaerobic generating device (102) and a secondary third biogas anaerobic generating device (103) of the biogas generating system is 15 tons;

the biogas generation control method comprises the following processing steps:

3) The second manual switch valve (157) is opened once every day, and the concentration and the PH value of the chemical oxygen demand CODcr of the biogas slurry are respectively checked; discharging 500ml of biogas slurry, and taking a biogas slurry sample; when the concentration of CODcr is less than 500mg/L and the PH value of biogas slurry is more than 7.4, starting a liquid discharge system (95) to discharge the biogas slurry from the second-stage first biogas anaerobic generating device (101); starting a slag discharging system A (96) to discharge biogas residues to a second-stage first biogas anaerobic generating device (101); starting a secondary feeding system (99) to supplement materials for the secondary first biogas anaerobic generating device (101); when the pH value is found to be more than 8 or less than 6, the acid or alkali adding treatment is needed, and the method is as follows: firstly calculating the amount of acid or alkali to be added, adding the required acid or alkali into a feeding barrel (3), opening a self-moving trolley (14) to the vicinity of a second manual switch valve (157) of a second-stage first biogas anaerobic generating device (101), communicating an outlet of a feeding pump (15) and an outlet of the second manual switch valve (157) through a hose, starting the feeding pump (15), and finishing the acid or alkali addition of the second-stage first biogas anaerobic generating device (101) and simultaneously starting a stirring system of the second-stage first biogas anaerobic generating device (101) for 10 minutes;

4) The third manual switch valve (158) is opened once every day to respectively check the concentration and the PH value of the chemical oxygen demand CODcr of the biogas slurry; discharging 500ml of biogas slurry, and taking a biogas slurry sample; when the concentration of CODcr is less than 500mg/L and the PH value of biogas slurry is more than 7.4, starting a liquid discharge system (95) to discharge the biogas slurry from the second-stage second biogas anaerobic generating device (102); starting a slag discharging system A (96) to discharge biogas residues to a second-stage second biogas anaerobic generating device (102); starting a secondary feeding system (99) to supplement materials for the secondary second biogas anaerobic generating device (102); when the pH value is found to be more than 8 or less than 6, the acid or alkali adding treatment is needed, and the method is as follows: firstly calculating the amount of acid or alkali to be added, adding the required acid or alkali into a feeding barrel (3), opening a self-moving trolley (14) to the vicinity of a third manual switch valve (158) of a second-stage second biogas anaerobic generating device (102), communicating an outlet of a feeding pump (15) and an outlet of the third manual switch valve (158) through a hose, opening the feeding pump (15), completing the acid or alkali addition of the second-stage second biogas anaerobic generating device (102), and simultaneously opening a stirring system of the second-stage second biogas anaerobic generating device (102) for 10 minutes;

5) The fourth manual switch valve (159) is opened once every day to respectively check the concentration and the PH value of the chemical oxygen demand CODcr of the biogas slurry; discharging 500ml of biogas slurry, and taking a biogas slurry sample; when the concentration of CODcr is less than 500mg/L and the PH value of biogas slurry is more than 7.4, a liquid discharge system (95) is started to discharge the biogas slurry from the second-stage third biogas anaerobic generating device (103); starting a slag discharging system A (96) to discharge biogas residues to a second-stage third biogas anaerobic generating device (103); starting a secondary feeding system (99) to supplement materials for a secondary third biogas anaerobic generating device (103); when the pH value is found to be more than 8 or less than 6, the acid or alkali adding treatment is needed, and the method is as follows: firstly calculating the amount of acid or alkali to be added, adding the required acid or alkali into a feeding barrel (3), opening a self-moving trolley (14) to the vicinity of a fourth manual switch valve (159) of a second-stage third biogas anaerobic generating device (103), communicating outlets of a feeding pump (15) and the fourth manual switch valve (159) through a hose, opening the feeding pump (15), and completing the acid or alkali addition of the second-stage third biogas anaerobic generating device (103) and simultaneously opening a stirring system of the second-stage third biogas anaerobic generating device (103) for 10 minutes;

2. The biogas generation control method according to claim 1, wherein: the rotation directions of the first stirring component (4) and the second stirring component (5) are opposite.

3. The biogas generation control method according to claim 1, wherein: the primary feeding valve (113) is a normally-closed electromagnetic reversing valve; the primary slag discharging valve A (144) and the primary slag discharging valve B (145) are normally closed electromagnetic directional valves; the first feeding valve (120), the second feeding valve (121) and the third feeding valve (122) are normally closed electromagnetic reversing valves; the first exhaust valve (123), the second exhaust valve (124), the third exhaust valve (125) and the fourth exhaust valve (126) are electromagnetic normally open reversing valves; the first heat supply water inlet valve (142), the second heat supply water inlet valve (127), the third heat supply water inlet valve (128), the fourth heat supply water inlet valve (129), the first heat supply water return valve (143), the second heat supply water return valve (133), the third heat supply water return valve (134) and the fourth heat supply water return valve (135) are normally closed electromagnetic reversing valves; the first biogas slurry discharge valve (146), the second biogas slurry discharge valve (139), the third biogas slurry discharge valve (140) and the fourth biogas slurry discharge valve (141) are all normally closed electromagnetic directional valves; the first biogas residue discharging valve A (130), the second biogas residue discharging valve A (131) and the third biogas residue discharging valve A (132) are normally closed electromagnetic directional valves; the first biogas residue discharging valve B (136), the second biogas residue discharging valve B (137) and the third biogas residue discharging valve B (138) are normally closed electromagnetic directional valves.

4. The biogas generation system adopted by the biogas generation control method according to claim 1 comprises a pretreatment system (90), a feeding system (91), an exhaust system (92), a heating system (93), a checking system (94), a liquid discharging system (95), a slag discharging system A (96) and a slag discharging system B (97) of biogas raw materials; the biogas raw material pretreatment system (90) comprises the steps of precipitation, mixing, dosing and neutralization of raw materials, and the pretreatment of the biogas raw materials is completed in a pretreatment tank (100);

the first crushing assembly B (40) is arranged at the position a of the second Y-shaped connecting frame (9) through a first short shaft B (46), and a rotating piece of the first crushing assembly B (40) can rotate around the first short shaft B (46); the second crushing assembly B (41) is arranged at the position B of the second Y-shaped connecting frame (9) through a second short shaft B (47), and a rotating piece of the second crushing assembly B (41) can rotate around the second short shaft B (47); the third crushing assembly B (42) is arranged at the position c of the second Y-shaped connecting frame (9) through a third short shaft B (48), and a rotating piece of the third crushing assembly B (42) can rotate around the third short shaft B (48); the fourth crushing assembly B (43) is arranged at the position d of the second Y-shaped connecting frame (9) through a fourth short shaft B (49), and a rotating piece of the fourth crushing assembly B (43) can rotate around the fourth short shaft B (49); the fifth crushing assembly B (44) is arranged at the position e of the second Y-shaped connecting frame (9) through a fifth short shaft B (50), and a rotating piece of the fifth crushing assembly B (44) can rotate around the fifth short shaft B (50); the sixth crushing assembly B (45) is mounted at a position f of the second Y-shaped connecting frame (9) by a sixth stub shaft B (51), the turning member of the sixth crushing assembly B (45) being rotatable about the sixth stub shaft B (51).

5. A biogas generation system according to claim 4, wherein: the rotation directions of the first stirring component (4) and the second stirring component (5) are opposite.

6. A biogas generation system according to claim 4, wherein: the primary feeding valve (113) is a normally-closed electromagnetic reversing valve; the primary slag discharging valve A (144) and the primary slag discharging valve B (145) are normally closed electromagnetic directional valves; the first feeding valve (120), the second feeding valve (121) and the third feeding valve (122) are normally closed electromagnetic reversing valves; the first exhaust valve (123), the second exhaust valve (124), the third exhaust valve (125) and the fourth exhaust valve (126) are electromagnetic normally open reversing valves; the first heat supply water inlet valve (142), the second heat supply water inlet valve (127), the third heat supply water inlet valve (128), the fourth heat supply water inlet valve (129), the first heat supply water return valve (143), the second heat supply water return valve (133), the third heat supply water return valve (134) and the fourth heat supply water return valve (135) are normally closed electromagnetic reversing valves; the first biogas slurry discharge valve (146), the second biogas slurry discharge valve (139), the third biogas slurry discharge valve (140) and the fourth biogas slurry discharge valve (141) are all normally closed electromagnetic directional valves; the first biogas residue discharging valve A (130), the second biogas residue discharging valve A (131) and the third biogas residue discharging valve A (132) are normally closed electromagnetic directional valves; the first biogas residue discharging valve B (136), the second biogas residue discharging valve B (137) and the third biogas residue discharging valve B (138) are normally closed electromagnetic directional valves.