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CN-122012224-A - Anaerobic biogas preparation device based on kitchen waste

CN122012224ACN 122012224 ACN122012224 ACN 122012224ACN-122012224-A

Abstract

The invention discloses an anaerobic methane preparation device based on kitchen waste, which relates to the technical field of kitchen waste treatment and comprises a squeezing box, wherein the upper end of the squeezing box is connected with a feeding mechanism capable of crushing and treating the kitchen waste, a separation mechanism used for separating solid and liquid of the kitchen waste is arranged in the squeezing box, a liquid draining mechanism capable of conducting grease liquid and non-grease liquid shunting and draining on kitchen waste filtrate is arranged below the separation mechanism, a conveying auger is arranged below the separation mechanism, a pyrolysis furnace is communicated with the inside of the pyrolysis furnace through a connecting pipe, and the high grease liquid is independently shunted by the liquid draining mechanism through the cooperation of the squeezing box, the conveying auger and the pyrolysis furnace, so that the inhibition of grease on methanogenic bacteria by grease is eliminated from the source, the pyrolysis condensate and the non-grease liquid are fermented in a cooperated mode, and the utilization rate of reaction substrates is further improved.

Inventors

  • PI MENG

Assignees

  • 北京朝阳环境集团有限公司

Dates

Publication Date
20260512
Application Date
20251229

Claims (10)

  1. 1. The anaerobic methane preparation device based on kitchen waste is characterized by comprising a squeezing box (1), wherein the upper end of the squeezing box (1) is connected with a feeding mechanism capable of crushing the kitchen waste, a separation mechanism used for separating solid from liquid of the kitchen waste is arranged in the squeezing box (1), a liquid draining mechanism capable of conducting grease liquid and non-grease liquid diversion liquid draining on kitchen waste filtrate is arranged below the separation mechanism, and a discharging pipe (6) used for draining the kitchen waste after squeezing is communicated with the other side of the squeezing box (1); The conveying auger (5) is obliquely arranged on one side of the pressing box (1) through a supporting mechanism (7), one end of the conveying auger (5) is communicated with the blanking pipe (6), and one end of the conveying auger (5) is communicated with the inside of the pressing box (1) through a liquid return pipe (16); Pyrolysis oven (8), the discharge end of carrying auger (5) is through the inside intercommunication of connecting pipe (20) with pyrolysis oven (8), pyrolysis oven (8) are used for carrying out even pyrolysis with pressing back rubbish, the upper end intercommunication of pyrolysis oven (8) has pyrolysis gas collecting pipe (9), the one end intercommunication of pyrolysis gas collecting pipe (9) has the condenser, the play liquid end intercommunication of condenser has anaerobic reactor, the discharged non-grease liquid of flowing back mechanism transmits to anaerobic reactor, discharge auger (25) that are used for the biochar row material after the pyrolysis are installed to the lower extreme of pyrolysis oven (8).
  2. 2. The anaerobic biogas preparation device based on kitchen waste according to claim 1, wherein the separation mechanism comprises a first filter screen (17) obliquely arranged in the pressing box (1) and a pressing mechanism (4) which is positioned above the first filter screen (17) and is used for pressing the kitchen waste, and the liquid draining mechanism is positioned on one side of the pressing box (1) below the first filter screen (17).
  3. 3. The anaerobic biogas preparation device based on kitchen waste according to claim 2, wherein the squeezing mechanism (4) comprises a hydraulic cylinder (41) arranged at the upper end of the squeezing box (1) and a squeezing plate (43) arranged above the first filter screen (17), an inclined plane which is in inclination matching with the first filter screen (17) is arranged at the lower end of the squeezing plate (43), the upper end of the squeezing plate (43) is connected with the telescopic end of the hydraulic cylinder (41), and two sides of the upper end of the squeezing plate (43) are connected with the inner top of the squeezing box (1) through telescopic rods (42).
  4. 4. The anaerobic biogas preparation device based on kitchen waste, as claimed in claim 3, characterized in that the feeding mechanism comprises a feeding hopper (2) and a crushing box (3) fixed below the feeding hopper (2) and provided with an opening at the upper end and the lower end, and a discharging hole (34) used for being communicated with the crushing box (3) is formed in the upper end of the pressing box (1).
  5. 5. The anaerobic biogas preparation device based on kitchen waste, as claimed in claim 4, wherein the drainage mechanism comprises a drainage pipe (14) for draining base fluid and an oil drainage pipe (13) for draining grease floating on the surface of the base fluid, flow valves are arranged on the drainage pipe (14) and the oil drainage pipe (13), a diversion mechanism (18) is arranged at the position of the drainage pipe (13) of the squeezing box (1), and a liquid level sensor (19) is arranged at one side of the diversion mechanism (18).
  6. 6. The anaerobic biogas preparation device based on kitchen waste according to claim 5, wherein the flow guiding mechanism (18) comprises a triangular plate (181) and stop blocks (182) positioned on two sides of the triangular plate (181), the triangular plate (181) is positioned at a position of 2-3mm of grease liquid separated from liquid in the squeezing box (1), and the stop blocks (182) are distributed at the oil drain pipe (13) in a splayed shape.
  7. 7. The anaerobic biogas preparation device based on kitchen waste according to claim 6, wherein a plurality of flushing pipes (15) are obliquely arranged above the flow guiding mechanism (18), a spray head (28) is arranged at one end of each flushing pipe (15), the spraying end of each spray head (28) faces to the lower surface of the first filter screen, and the other end of each flushing pipe (15) is communicated with a water source through a water pump.
  8. 8. The anaerobic biogas preparation device based on kitchen waste, as claimed in claim 7, characterized in that a second filter screen (22) capable of being heated is detachably arranged in the pyrolysis furnace (8), a bulk material mixing mechanism (10) for feeding and stirring kitchen waste on the second filter screen (22) is arranged in the pyrolysis furnace (8), a discharging auger (25) for discharging pyrolyzed biochar is arranged below the second filter screen (22), and a solid discharging pipe (12) communicated with the discharging auger (25) is arranged on one side of the pyrolysis furnace (8).
  9. 9. The anaerobic biogas preparation device based on kitchen waste, as claimed in claim 8, characterized in that the bulk mixing mechanism (10) comprises a rotating rod (102) rotatably mounted at the inner top of the pyrolysis furnace (8), an umbrella disc (103) is fixed at the lower end of the rotating rod (102), one side of the umbrella disc (103) is located at the outlet of the connecting pipe (20), a second motor (101) is mounted at the upper end of the rotating rod (102) penetrating through the upper end of the pyrolysis furnace (8), a connecting rod (104) is fixed at the center of the lower surface of the umbrella disc (103), a stirring rod (105) is fixed at the lower end of the connecting rod (104), and the stirring rod (105) is located above the second filter screen (22).
  10. 10. The anaerobic biogas preparation device based on kitchen waste, as claimed in claim 9, wherein the discharging auger (25) comprises a rotating shaft (253) rotatably mounted on the side wall of the pyrolysis furnace (8), a third motor (254) is mounted at one end of the rotating shaft (253), a spiral sheet (255) is fixed on the outer wall of the rotating shaft (253) in the pyrolysis furnace (8), a semi-arc-shaped bottom groove (251) is sleeved outside the spiral sheet (255), material guide plates (252) are obliquely arranged on two sides of the bottom groove (251), the upper ends of the material guide plates (252) are in contact with the lower surface of the second filter screen (22), one end of the solid discharge pipe (12) is communicated with one end of the bottom groove (251), and the other end of the rotating shaft (253) extends into the solid discharge pipe (12).

Description

Anaerobic biogas preparation device based on kitchen waste Technical Field The invention belongs to the technical field of kitchen waste treatment, and particularly relates to an anaerobic biogas preparation device based on kitchen waste. Background Along with the acceleration of town process and the improvement of living standard of residents, the production of kitchen waste is increased year by year, the kitchen waste has complex components and high recovery potential of resources, and at present, the recycling treatment mode of kitchen waste mainly comprises the steps of directly anaerobic fermentation to prepare methane, landfill, incineration, forage conversion and the like, wherein the conversion of waste and energy sources can be realized by the anaerobic fermentation to prepare methane, the main stream technical direction is one of the main stream technical directions, and the corresponding device adopts a single-stage or multi-stage anaerobic reactor to directly throw the crushed kitchen waste into the reactor for fermentation. However, because the content of grease in kitchen garbage is generally higher, after the grease directly enters the anaerobic reactor, the grease is easy to float and accumulate in the reactor to form an oil film to cover the surface of feed liquid, which hinders the gas-liquid mass transfer process, and simultaneously can destroy the cell membrane structure of anaerobic bacteria to inhibit the activity of methanogen, thus greatly reducing the yield of methane and even causing the acidification of the reactor to cause corrosion, thus affecting the service life of the reactor. Disclosure of Invention The invention aims to provide an anaerobic biogas preparation device based on kitchen waste, which can realize the quality-divided recycling of the kitchen waste, improve the biogas yield and prolong the service life of a reactor, so as to solve the problems in the prior art. In order to achieve the above purpose, the invention adopts the following technical scheme: the anaerobic biogas preparation device based on kitchen waste comprises a squeezing box, wherein the upper end of the squeezing box is connected with a feeding mechanism capable of crushing the kitchen waste, a separation mechanism used for separating solid from liquid of the kitchen waste is arranged in the squeezing box, a liquid draining mechanism capable of conducting grease liquid and non-grease liquid diversion liquid draining on kitchen waste filtrate is arranged below the separation mechanism, and the other side of the squeezing box is communicated with a discharging pipe used for draining the kitchen waste after squeezing; The conveying auger is obliquely arranged on one side of the pressing box through the supporting mechanism, one end of the conveying auger is communicated with the blanking pipe, and one end of the conveying auger is communicated with the inside of the pressing box through the liquid return pipe; The pyrolysis oven, the discharge end of carrying the auger passes through the inside intercommunication of connecting pipe and pyrolysis oven, the pyrolysis oven is used for carrying out even pyrolysis with squeezing the back rubbish, the upper end intercommunication of pyrolysis oven has the pyrolysis gas collecting pipe, the one end intercommunication of pyrolysis gas collecting pipe has the condenser, the liquid outlet end intercommunication of condenser has anaerobic reactor, the discharged non-grease liquid of flowing back mechanism transmits to anaerobic reactor, the discharge auger that is used for the biochar row material after the pyrolysis is installed to the lower extreme of pyrolysis oven. Preferably, the separating mechanism comprises a first filter screen obliquely arranged in the squeezing box and a squeezing mechanism which is positioned above the first filter screen and is used for squeezing kitchen waste, and the liquid draining mechanism is positioned on one side of the squeezing box below the first filter screen. Preferably, the squeezing mechanism comprises a hydraulic cylinder arranged at the upper end of the squeezing box and a squeezing plate arranged above the first filter screen, wherein an inclined plane matched with the inclination of the first filter screen is arranged at the lower end of the squeezing plate, the upper end of the squeezing plate is connected with the telescopic end of the hydraulic cylinder, and two sides of the upper end of the squeezing plate are connected with the inner top of the squeezing box through telescopic rods. Preferably, the feeding mechanism comprises a feeding hopper and a crushing box which is fixed below the feeding hopper and is arranged at the upper end and the lower end of the feeding hopper in an open mode, and a discharging hole which is communicated with the crushing box is formed in the upper end of the crushing box. Preferably, the liquid draining mechanism comprises a liquid draining pipe for draining the bottom liquid and an