A device and method for promoting methane production based on carbon materials

Abstract

The present invention discloses a device and a method for using carbon material to promote methane production. The device includes a device body, a stirring assembly, a screening assembly and a monitoring assembly. The device body includes a shell, and an upper cover plate is installed on the shell; the stirring assembly includes a stirring shaft, and the stirring shaft is rotatably connected to the upper cover plate. The lower end of the stirring shaft is placed in the shell, and the stirring shaft is placed on the side wall of the shell with multiple installation shells installed. A carbon material containing box is installed in each of the multiple installation shells, and a plurality of screens are installed in the carbon material containing box, and the carbon material containing box is loaded with carbon material. The present invention improves the efficiency of anaerobic sludge in producing methane by shortening the anaerobic sludge cycle, so as to improve the recovery rate of energy in the sludge, realize the efficient resource utilization of the sludge, and has good environmental and economic benefits. At the same time, the process cost of its methane production is low, the equipment is practical, and it is easy to promote.

Description

Technical Field

[0001] The present invention belongs to the technical field of anaerobic microbial methane production, and specifically relates to a device for promoting methane production based on carbon materials and a method for using the device. Background Art

[0002] With the widespread application of wastewater biological treatment technology, the output of excess sludge is increasing, and the sludge disposal costs in sewage treatment plants often account for more than 50% of the total operating costs. The efficient resource utilization of excess sludge has become one of the focuses of sludge treatment. Anaerobic digestion technology can efficiently convert organic matter in sludge into methane with a high calorific value, and has been widely used in wastewater treatment and sludge treatment. This technology realizes the efficient recovery of energy in sludge, has good environmental and economic benefits, and is a biotechnology with great development prospects.

[0003] In the traditional anaerobic digestion process, the conversion of organic matter in sludge into methane includes several stages: hydrolysis, acidification, acetic acid production, hydrogen production, and methane production. In order to improve the conversion efficiency of organic matter in sludge, conductive materials are used as electron conduits for direct electron exchange between bacterial species to promote the DIET process. Carbon materials are commonly used conductive materials.

[0004] Although the DIET process mediated by carbon-based materials can greatly increase the rate of methanogenesis, the process cannot directly utilize the complex organic matter in the sludge for cometabolism to produce methane. The complex organic matter must first be hydrolyzed and acidified before it can be effectively utilized by electroactive symbiotic microorganisms to produce methane. Since the hydrolysis and acidification process greatly prolongs the cycle of methanogenesis from organic matter in the sludge, the efficiency of methanogenesis from organic matter in the sludge is reduced.

[0005] The information disclosed in this background technology section is only intended to enhance the understanding of the overall background of the invention and should not be regarded as an acknowledgment or any form of suggestion that the information constitutes the prior art already known to a person skilled in the art. Summary of the invention

[0006] The object of the present invention is to provide a device and a method for promoting methane production based on carbon materials, which can solve the problem of low efficiency caused by the long methane production cycle of sludge through anaerobic digestion.

[0007] In order to achieve the above object, a technical solution provided by a specific embodiment of the present invention is as follows:

[0008] A device for promoting methanogenesis based on carbon materials, comprising:

[0009] The equipment body includes a shell, which is used to provide a place for anaerobic sludge digestion. The shell is equipped with an upper cover plate, which is designed to facilitate the disassembly and assembly of the upper end of the shell, so as to facilitate the maintenance and replacement of the internal equipment during operation.

[0010] The stirring assembly comprises a stirring shaft, which is rotatably connected to the upper cover plate, and the rotation of the stirring shaft drives the rotating part to rotate; the lower end of the stirring shaft is placed in a shell, and a plurality of mounting shells are installed on the side wall of the stirring shaft placed in the shell, and a carbon material containing box is installed in each of the plurality of mounting shells, and the rotation of the stirring shaft drives the mounting shell to rotate, and when the mounting shell rotates, the carbon material containing box can be driven to rotate; a plurality of screens are installed in the carbon material containing box, and the carbon material is loaded in the carbon material containing box, and the carbon material is used to contact with the sludge, so that the conductive material in the carbon material is used as an electron tube for electron exchange between bacteria, thereby promoting the DIET process, thereby improving the efficiency of anaerobic sludge in producing methane; at the same time, the rotation of the carbon material containing box will stir the anaerobic sludge, so that the complex organic matter in the anaerobic sludge is decomposed into simple organic matter under the action of acidic putrefactive bacteria or acid-producing bacteria, thereby effectively shortening the time used for the hydrolysis, acidification and acetic acid and hydrogen production processes of the anaerobic sludge, thereby shortening the cycle of anaerobic sludge methane production. The carbon material is arranged between the outer side walls of the plurality of screens, and the screen allows the sludge to contact the carbon material when passing through, so that the conductive material and the bacteria are in contact; heating plates are installed on the inner side walls of the upper and lower wall panels of the carbon material holding box, and the heating plates are used to adjust the temperature of the sludge so that the sludge is in an optimal temperature environment in the shell, so as to promote the digestion process of the anaerobic sludge.

[0011] The screening assembly comprises a centrifugal drum, which is used to screen the sludge so as to limit the particle size of the sludge particles entering the shell, so that the sludge particles are suitable for anaerobic sludge digestion; the bottom wall plate of the centrifugal drum is fixedly connected to the side wall of the stirring shaft so that the centrifugal drum can be driven to rotate by the rotation of the stirring shaft to realize centrifugal separation of the sludge.

[0012] The monitoring components include a temperature control system, a pH control system and a pH detector. Since the digestion process of anaerobic sludge has extremely strict requirements on pH and temperature, only when the pH and temperature are within the required range can the digestion process of anaerobic sludge be promoted, thereby promoting the production of methane.

[0013] In one or more embodiments of the present invention, a connecting ring is integrally formed at the upper end of the shell, the upper cover is installed on the connecting ring, and a plurality of fixing bolts are installed between the upper cover and the connecting ring. Since the fixing bolts are easy to disassemble and assemble, the upper cover is easy to disassemble and assemble.

[0014] In one or more embodiments of the present invention, a pretreatment device is installed on the upper cover plate, and the sludge is filtered and ground by the pretreatment device before entering the shell, so as to filter out large particles of impurities in the sludge, and grind the filtered sludge to make the particle size of the sludge particles smaller. A conveying pipe is installed between the discharge port of the pretreatment device and the upper cover plate, and the sludge treated by the pretreatment device is transported through the conveying pipe. A sewage outlet is installed at the bottom of the shell, and after the sludge completes the production of methane in the shell, it is discharged from the shell through the sewage outlet.

[0015] In one or more embodiments of the present invention, the carbon material is one or more combinations of biochar, graphite, carbon-carbon composite material, porous activated carbon and graphene, and these carbon materials have excellent performance, so that when the carbon material contacts the sludge, the conductive material acts as an electron tube for electron exchange between bacteria, further promoting the DIET process, thereby effectively improving the efficiency of anaerobic sludge digestion to produce methane. The specific surface area of ​​the carbon material is 30-450m2 / g, which is used to further promote the DIET process.

[0016] In one or more embodiments of the present invention, the aperture of the mesh on the screen is smaller than the particle size of the carbon material, so that the carbon material will not flow out through the screen, so as to ensure that the carbon material can contact the sludge without causing the screen to overflow. A through hole is formed between the screen and the front and rear side walls of the stirring shaft. The through hole formed by the screen allows the anaerobic sludge to contact the carbon material in the process of passing through the through hole. Since the carbon material holding box can be rotated during use to drive the screen to rotate, the sludge in the shell is constantly in contact with the carbon material, thereby greatly improving the efficiency of the conductive material as an electron tube for electron exchange between strains, thereby promoting the DIET process, thereby effectively shortening the anaerobic sludge digestion cycle and improving the efficiency of anaerobic sludge in producing methane. A feed port is provided on the front and rear side walls of the mounting shell so that the sludge can enter the screen through the feed port when the stirring shaft stirs the sludge. The upper side wall of the carbon material container box is provided with a plurality of carbon material adding ports. Since the carbon material is a consumable material, it needs to be replaced regularly during use to ensure the performance of the carbon material. The carbon material container box in the carbon material container box can be discharged through the carbon material adding port, and then new carbon material can be added. At the same time, a plurality of carbon material adding ports are provided, so that the carbon material is easy to discharge, and the carbon material after addition is evenly distributed in the carbon material container box. The inner walls of the upper and lower wall plates of the mounting shell are fixedly connected with a slide groove, and the upper and lower side walls of the carbon material container box are fixedly connected with a slider, and the slider is slidably connected in the slide groove. Through the cooperation between the slider and the slide groove, the carbon material container box is easy to disassemble and assemble in the mounting shell. When the carbon material container box is installed in the mounting shell, the connection needs to be sealed to ensure that the sludge will only flow into the screen through the feed port. A cover plate is installed on one side of the opening of the mounting shell, and a fixing screw is threadedly connected between the mounting shell and the cover plate. The cover plate limits the movement of the carbon material containing box installed in the mounting shell, and the fixing screw facilitates the disassembly and assembly of the cover plate, so that the carbon material containing box is easy to disassemble and assemble in the mounting shell, thereby facilitating the replacement of the carbon material.

[0017] In one or more embodiments of the present invention, a connecting block is fixedly connected between the stirring shaft and the mounting shell, and the mounting shell is stably rotated by the connecting block under the drive of the stirring shaft. A receiving groove is provided in the stirring shaft, and a power cord is provided in the receiving groove, and external power is introduced through the power cord. An electrode is installed at one end of the heating plate, and the end of the electrode away from the heating plate is installed on the side wall of the power cord. The power introduced by the power cord is transmitted to the heating plate through the electrode, so that the heating plate generates heat. Since the carbon material has excellent thermal conductivity, the heat generated by the heating plate will be quickly transferred through the carbon material, so that the carbon material can transfer heat when it comes into contact with the sludge.

[0018] In one or more embodiments of the present invention, the upper end of the centrifuge cylinder is installed on the bottom of the upper cover plate, and the lower end of the feed pipe is connected to the centrifuge cylinder so that the feed pipe introduces the sludge into the centrifuge cylinder for screening. A plurality of screening holes are provided on the side wall of the centrifuge cylinder, and the aperture of the screening holes is set to 0.5~1mm. An auxiliary agent feeding port is installed on the upper cover plate, and the lower end of the auxiliary agent feeding port is connected to the centrifuge cylinder. The auxiliary agent is added into the centrifuge cylinder through the auxiliary agent feeding port, so that the auxiliary agent is mixed with the sludge in the centrifuge cylinder, thereby improving the effect of the auxiliary agent after addition.

[0019] In one or more embodiments of the present invention, the temperature adjustment system, the pH adjustment system and the pH detector are connected by signals. Since the pH detector can detect not only the pH but also the temperature, the data detected by the pH detector can be transmitted to the temperature adjustment system and the pH adjustment system, so as to adjust the temperature and pH of the sludge in the shell in real time. The pH detector is provided with a pair, and a pair of sampling tubes are provided on the side wall of the shell. The ends of the pair of sampling tubes away from the shell are installed on the feed ports of the pair of pH detectors. By providing a pair of pH detectors, the temperature and pH of the sludge at different positions in the shell can be detected to ensure that the temperature and pH of the sludge are within the corresponding range.

[0020] A method for using a device for promoting methanogenesis based on carbon materials, the method comprising:

[0021] S1. Put the sludge into the pretreatment equipment, filter and grind the sludge to obtain mixed sludge;

[0022] S2. The mixed sludge is transported to the centrifuge drum through the feed pipe, and the sludge is screened by the centrifugal action of the centrifuge drum. At the same time, an auxiliary agent is added to the centrifuge drum through the auxiliary agent feeding port, so that the auxiliary agent is mixed with the sludge in the centrifuge drum;

[0023] S3. The sieved sludge enters the housing, and when the agitator shaft drives the mounting housing to rotate, the carbon material container is driven to rotate, so that the sludge passes through the screen and contacts the carbon material, thereby promoting DIET through the carbon material; at the same time, the heat generated by the heating plate contacts the sludge, so as to adjust the ambient temperature of the sludge;

[0024] S4. The pH and temperature of the sludge in different parts of the shell are monitored in real time by a pH detector, and the data are transmitted to the temperature regulation system and the pH regulation system. The pH in the shell is regulated by the pH regulation system, and the temperature in the shell is regulated by the temperature regulation system, so that the pH and temperature in the shell are within corresponding ranges.

[0025] In one or more embodiments of the present invention, the rotation speed of the stirring shaft is 120-240 rpm, the temperature of the sludge in the shell is controlled at 35-40° C., and the pH of the sludge in the shell is controlled at 7-8.

[0026] Compared with the prior art, the present invention has the following advantages:

[0027] The present invention stirs the anaerobic sludge by rotating the stirring component, thereby promoting the decomposition of complex organic matter in the anaerobic sludge, thereby effectively shortening the decomposition cycle of the complex organic matter, and further improving the efficiency of methane production by the anaerobic sludge;

[0028] When the stirring assembly of the present invention stirs the sludge, the sludge will continuously contact the carbon material by passing through the screen, thereby greatly improving the efficiency of the conductive material as an electron tube for electron exchange between bacteria, thereby promoting the DIET process, thereby effectively shortening the anaerobic sludge digestion cycle and improving the efficiency of anaerobic sludge in producing methane;

[0029] The present invention adjusts the temperature and pH of anaerobic sludge in real time through a temperature adjustment system and a pH adjustment system, so that the anaerobic sludge is in a stable temperature and pH environment, thereby effectively improving the efficiency of anaerobic sludge in producing methane;

[0030] The present invention improves the efficiency of anaerobic sludge in producing methane by shortening the anaerobic sludge cycle, thereby improving the recovery rate of energy in the sludge, achieving efficient resource utilization of the sludge, and having good environmental and economic benefits. At the same time, the process cost of methane production is low, the equipment is practical, and it is easy to promote. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0032] Figure 1 It is a front view of a device for promoting methanogenesis based on carbon materials in one embodiment of the present invention;

[0033] Figure 2 A three-dimensional diagram of a device for promoting methane production based on carbon materials in one embodiment of the present invention;

[0034] Figure 3 A cross-sectional view of a device for promoting methane production based on carbon materials in one embodiment of the present invention;

[0035] Figure 4A cross-sectional view of a device for promoting methane production based on carbon materials in one embodiment of the present invention;

[0036] Figure 5 This is a schematic diagram of the interior of a device for promoting methanogenesis based on carbon materials in one embodiment of the present invention;

[0037] Figure 6 An exploded view of the installation shell and the carbon material containing box in one embodiment of the present invention;

[0038] Figure 7 In one embodiment of the present invention Figure 3 Schematic diagram at A in the middle;

[0039] Figure 8 In one embodiment of the present invention Figure 4 Schematic diagram of point B in the figure.

[0040] Description of main reference numerals:

[0041] 1-equipment body, 11-shell, 12-upper cover, 13-connecting ring, 14-fixing bolt, 15-pretreatment equipment, 16-feeding pipe, 17-drainage outlet, 2-stirring assembly, 21-stirring shaft, 22-mounting shell, 23-carbon material containing box, 24-carbon material, 25-screen, 26-heating plate, 27-electrode, 28-containing tank, 29-power cord, 210-feeding port, 211-connecting block, 212-carbon material adding port, 213-cover, 214-fixing screw, 215-bearing, 216-motor, 217-slider, 218-slide, 3-screening assembly, 31-centrifuge cylinder, 32-screening hole, 33-auxiliary agent adding port, 4-monitoring assembly, 41-sampling tube, 42-pH detector. DETAILED DESCRIPTION

[0042] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0043] like Figure 1~Figure 4 As shown, a device for promoting methane production based on carbon materials in one embodiment of the present invention includes a device body 1, a stirring component 2, a screening component 3 and a monitoring component 4.

[0044] like Figure 1~Figure 4As shown, the equipment body 1 includes a shell 11, which is used to provide a place for digestion of anaerobic sludge. An upper cover plate 12 is installed on the shell 11. The upper cover plate 12 is for the convenience of disassembly and assembly of the upper end of the shell 11, so as to facilitate maintenance and replacement of the internal equipment during operation.

[0045] like Figure 1~Figure 4 As shown, a connecting ring 13 is integrally formed at the upper end of the shell 11, and the upper cover plate 12 is installed on the connecting ring 13. A plurality of fixing bolts 14 are installed between the upper cover plate 12 and the connecting ring 13. Since the fixing bolts 14 are easy to disassemble and assemble, the upper cover plate 12 is easy to disassemble and assemble.

[0046] like Figure 1~Figure 4 As shown, a pretreatment device 15 is installed on the upper cover plate 12. Before the sludge enters the shell 11, the sludge is filtered and ground by the pretreatment device 15 to filter out large particles of impurities in the sludge, and the filtered sludge is ground to make the particle size of the sludge particles smaller. A conveying pipe 16 is installed between the discharge port of the pretreatment device 15 and the upper cover plate 12, and the sludge treated by the pretreatment device 15 is transported through the conveying pipe 16. A sewage outlet 17 is installed at the bottom of the shell 11. After the sludge completes the production of methane in the shell 11, it is discharged from the shell 11 through the sewage outlet 17.

[0047] like Figure 1~Figure 4 As shown, the stirring assembly 2 includes a stirring shaft 21, which is rotatably connected to the upper cover plate 12, and the rotation of the stirring shaft 21 drives the rotating component to rotate; the lower end of the stirring shaft 21 is placed in the shell 11, and the stirring shaft 21 is placed on the side wall of the shell 11 and is installed with a plurality of mounting shells 22, and a carbon material containing box 23 is installed in each of the plurality of mounting shells 22, and the rotation of the stirring shaft 21 drives the mounting shell 22 to rotate, and when the mounting shell 22 rotates, it can drive the carbon material containing box 23 to rotate; a plurality of screens 25 are installed in the carbon material containing box 23, and the carbon material containing box 23 is loaded with carbon material 24, and the carbon material 24 is used to contact with the sludge so that the conductive material in the carbon material 24 can be used as an electron tube for electron exchange between bacterial species, thereby promoting the DIET process, and then improving the efficiency of anaerobic sludge in producing methane.

[0048] Furthermore, the carbon material 24 is arranged between the outer walls of multiple screens 25, and the sludge can contact the carbon material 24 through the screen 25 so that the conductive material and the bacteria are in contact; heating plates 26 are installed on the inner walls of the upper and lower wall panels of the carbon material holding box 23, and the heating plates 26 are used to adjust the temperature of the sludge so that the sludge is in an optimal temperature environment in the shell 11, so as to promote the digestion process of the anaerobic sludge.

[0049] Preferably, the rotation of the mounting shell 22 and the carbon material containing box 23 will stir the anaerobic sludge, so that the complex organic matter in the anaerobic sludge is decomposed into simple organic matter under the action of acidic putrefactive bacteria or acid-producing bacteria, thereby effectively shortening the time taken for the anaerobic sludge hydrolysis, acidification and acetic acid and hydrogen production processes, thereby shortening the cycle of anaerobic sludge methane production.

[0050] Preferably, the carbon material 24 is one or more combinations of biochar, graphite, carbon-carbon composites, porous activated carbon and graphene. These carbon materials have excellent properties, so that when the carbon material contacts the sludge, the conductive material acts as an electron tube for electron exchange between bacterial species, further promoting the DIET process, thereby effectively improving the efficiency of anaerobic sludge digestion to produce methane.

[0051] Furthermore, the specific surface area of ​​the carbon material 24 is 30-450 m2 / g, which is used to further promote the DIET process.

[0052] like Figure 3 , Figure 6 and Figure 7 As shown, the aperture of the mesh 25 is smaller than the particle size of the carbon material 24, so that the carbon material 24 does not flow out through the mesh 25, so as to ensure that the carbon material 24 can contact with the sludge without causing the mesh 25 to overflow. A through hole is formed between the mesh 25 and the front and rear side walls of the stirring shaft 21, and the anaerobic sludge contacts the carbon material 24 when passing through the through hole formed by the mesh 25.

[0053] Preferably, since the carbon material containing box 23 can rotate during use so as to drive the screen 25 to rotate, the sludge in the shell 11 is constantly in contact with the carbon material 24, thereby greatly improving the efficiency of the conductive material as an electron tube for electron exchange between bacterial species, thereby promoting the DIET process, thereby effectively shortening the anaerobic sludge digestion cycle and improving the efficiency of anaerobic sludge in producing methane.

[0054] like Figure 5 and Figure 6 As shown, a feed port 210 is provided on the front and rear side walls of the mounting shell 22, so that when the stirring shaft 21 stirs the sludge, the sludge can enter the screen 25 through the feed port 210. A plurality of carbon material adding ports 212 are provided on the upper side wall plate of the carbon material holding box 23. Since the carbon material 24 is a consumable material, it needs to be replaced regularly during use to ensure the performance of the carbon material 24. The carbon material 24 in the carbon material holding box 23 can be discharged from the holding box 23 through the carbon material adding port 212, and then new carbon material 24 can be added. At the same time, a plurality of carbon material adding ports 212 are provided, so that the carbon material 24 is easy to be discharged, and the carbon material 24 after addition is evenly distributed in the carbon material holding box 23.

[0055] Further, such as Figure 6 As shown, the inner side walls of the upper and lower wall plates of the mounting shell 22 are fixedly connected with a slide groove 218, and the upper and lower side walls of the carbon material containing box 23 are fixedly connected with a slider 217, and the slider 217 is slidably connected in the slide groove 218. Through the cooperation between the slider 217 and the slide groove 218, the carbon material containing box 23 is easy to be disassembled and assembled in the mounting shell 22. When the carbon material containing box 23 is installed in the mounting shell 22, the connection needs to be sealed to ensure that the sludge will only flow into the screen 25 through the feed port 210. A cover plate 213 is installed on one side of the opening of the mounting shell 22, and a fixing screw 214 is threadedly connected between the mounting shell 22 and the cover plate 213. The cover plate 213 limits the movement of the carbon material containing box 23 installed in the mounting shell 22, and the fixing screw 214 makes the cover plate 213 easy to be disassembled and assembled, so as to facilitate the disassembly and assembly of the carbon material containing box 23 in the mounting shell 22, thereby facilitating the replacement of the carbon material 24.

[0056] like Figure 5 , Figure 7 and Figure 8 As shown, a connecting block 211 is fixedly connected between the stirring shaft 21 and the mounting shell 22, and the mounting shell 22 can rotate stably under the drive of the stirring shaft 21 through the connecting block 211. A receiving groove 28 is provided in the stirring shaft 21, and a power cord 29 is arranged in the receiving groove 28, and external power is introduced through the power cord 29. An electrode 27 is installed at one end of the heating plate 26, and the end of the electrode 27 away from the heating plate 26 is installed on the side wall of the power cord 29. The power introduced by the power cord 29 is transmitted to the heating plate 26 through the electrode 27, so that the heating plate 26 generates heat. Since the carbon material 24 has excellent thermal conductivity, the heat generated by the heating plate 26 will be quickly transferred through the carbon material 24, so that the carbon material 24 can transfer heat when it contacts the sludge.

[0057] like Figure 2 and Figure 5 As shown, a bearing 215 is installed on the upper cover plate 12, and the stirring shaft 21 is installed in the bearing 215, so that the stirring shaft 21 can rotate when in use under the action of the bearing 215. At the same time, a motor 216 is installed on the upper end of the rotating shaft 21, and the rotating shaft 21 is driven to rotate by the motor 216, so that the rotating shaft 21 drives the rotating parts to rotate.

[0058] like Figure 3~Figure 5 As shown, the screening assembly 3 includes a centrifugal drum 31, which is used to screen the sludge so as to limit the particle size of the sludge particles entering the shell 11, so that the sludge particles are suitable for anaerobic sludge digestion; the bottom wall plate of the centrifugal drum 31 is fixedly connected to the side wall of the stirring shaft 21, so that the centrifugal drum 31 can be driven to rotate by the rotation of the stirring shaft 21 to achieve centrifugal separation of the sludge.

[0059] like Figure 3~Figure 5 As shown, the upper end of the centrifugal cylinder 31 is installed at the bottom of the upper cover plate 12, and the lower end of the feed pipe 16 is connected to the centrifugal cylinder 31, so that the feed pipe 16 introduces the sludge into the centrifugal cylinder 31 for screening. A plurality of screening holes 32 are provided on the side wall of the centrifugal cylinder 31, and the aperture of the screening holes 32 is set to 0.5~1mm. An auxiliary agent feeding port 33 is installed on the upper cover plate 12, and the lower end of the auxiliary agent feeding port 33 is connected to the centrifugal cylinder 31. The auxiliary agent is added into the centrifugal cylinder 31 through the auxiliary agent feeding port 33, so that the auxiliary agent is mixed with the sludge in the centrifugal cylinder 31, thereby improving the effect of the auxiliary agent after addition.

[0060] Preferably, the auxiliary agent is a substance for adjusting the pH of sludge and a component necessary for the decomposition of anaerobic sludge, so as to accelerate the decomposition of anaerobic sludge.

[0061] like Figure 3 and Figure 4 As shown, the monitoring component 4 includes a temperature adjustment system, a pH adjustment system and a pH detector 42. Since the digestion process of anaerobic sludge has extremely strict requirements on pH and temperature, the digestion process of anaerobic sludge can be promoted only when the pH and temperature are within the required range, thereby promoting the production of methane.

[0062] like Figure 3 and Figure 4 As shown, the temperature adjustment system, the pH adjustment system and the pH detector 42 are connected by signals. Since the pH detector 42 can detect not only the pH but also the temperature, the data detected by the pH detector 42 can be transmitted to the temperature adjustment system and the pH adjustment system, so as to adjust the temperature and pH of the sludge in the housing 11 in real time. The pH detector 42 is provided with a pair of sampling tubes 41, and the end of the sampling tubes 41 away from the housing 11 is installed on the feed port of the pair of pH detectors 42. By providing a pair of pH detectors 42, the temperature and pH of the sludge at different positions in the housing 11 can be detected to ensure that the temperature and pH of the sludge are within the corresponding range.

[0063] Optionally, the monitoring component 4 uses a PLC control system.

[0064] When in use, the sludge is put into the pretreatment device 15, and the sludge is filtered and ground by the pretreatment device 15, so that the impurities in the sludge are filtered and the sludge particles are ground. The treated sludge is transported to the centrifugal drum 31 through the feeding pipe 16. When the centrifugal drum 31 rotates, the sludge can be screened under the action of centrifugal force, and the screened sludge will enter the housing 11;

[0065] When the stirring shaft 21 rotates to drive the mounting shell 22 and the carbon material containing box 23 to rotate, the mounting shell 22 and the carbon material containing box 23 will stir the sludge, and the sludge will pass through the screen 25, so that the sludge is constantly in contact with the carbon material 24, thereby greatly improving the efficiency of the conductive material as an electron tube for electron exchange between bacteria, thereby promoting the DIET process;

[0066] At the same time, the pH detector 42 will detect the pH and temperature of the sludge in real time, and adjust the temperature and pH of the sludge through the temperature adjustment system and the pH adjustment system so that the temperature and pH are controlled within the required range.

[0067] A method for using a device for promoting methanogenesis based on carbon materials in one embodiment of the present invention comprises:

[0068] S1, putting the sludge into the pretreatment equipment 15, filtering and grinding the sludge to obtain mixed sludge;

[0069] S2, the mixed sludge is transported to the centrifugal drum 31 through the feed pipe 16, the sludge is screened by the centrifugal action of the centrifugal drum 31, and an auxiliary agent is added to the centrifugal drum 31 through the auxiliary agent feeding port 33, so that the auxiliary agent is mixed with the sludge in the centrifugal drum 31;

[0070] S3, the sieved sludge enters the housing 11, and when the stirring shaft 21 drives the mounting shell 22 to rotate, it drives the carbon material containing box 23 to rotate, so that the sludge passes through the screen 25 and contacts the carbon material 24, thereby promoting DIET through the carbon material 24; at the same time, the heat generated by the heating plate 26 contacts the sludge, so as to adjust the ambient temperature of the sludge;

[0071] S4. The pH and temperature of the sludge in different parts of the shell 11 are monitored in real time by the pH detector 42, and the data are transmitted to the temperature adjustment system and the pH adjustment system. The pH in the shell 11 is adjusted by the pH adjustment system, and the temperature in the shell 11 is adjusted by the temperature adjustment system, so that the pH and temperature in the shell 11 are within the corresponding range.

[0072] Preferably, the rotation speed of the stirring shaft 21 is 120-240 rpm, the temperature of the sludge in the shell 11 is controlled at 35-40° C., and the pH of the sludge in the shell 11 is controlled at 7-8.

[0073] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0074] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A device for promoting methanogenesis based on carbon materials, characterized in that: include: The equipment body comprises a shell, an upper cover plate is installed on the shell, a pretreatment device is installed on the upper cover plate, a material delivery pipe is installed between the discharge port of the pretreatment device and the upper cover plate, and a sewage outlet is installed at the bottom of the shell; A stirring assembly, comprising a stirring shaft, the stirring shaft is rotatably connected to the upper cover plate, the lower end of the stirring shaft is placed in a shell, a plurality of mounting shells are installed on the side wall of the stirring shaft, a carbon material containing box is installed in each of the plurality of mounting shells, the rotation of the stirring shaft drives the mounting shell to rotate, and the rotation of the mounting shell can drive the carbon material containing box to rotate, a plurality of screens are installed in the carbon material containing box, the carbon material is loaded in the carbon material containing box, the carbon material is arranged between the outer side walls of the plurality of screens, and a heating plate is installed on the inner side walls of the upper and lower wall plates of the carbon material containing box; The screening component comprises a centrifugal cylinder, which is used to screen the sludge. The screened sludge will enter the shell so as to limit the particle size of the sludge particles entering the shell, so that the sludge particles are suitable for anaerobic sludge digestion; the bottom wall plate of the centrifugal cylinder is fixedly connected to the side wall of the stirring shaft so as to drive the centrifugal cylinder to rotate by the rotation of the stirring shaft to achieve centrifugal separation of the sludge; the upper end of the centrifugal cylinder is installed at the bottom of the upper cover plate, the lower end of the feed pipe is connected to the centrifugal cylinder, a plurality of screening holes are arranged on the side wall of the centrifugal cylinder, an auxiliary agent feeding port is installed on the upper cover plate, and the lower end of the auxiliary agent feeding port is connected to the centrifugal cylinder; Monitoring components include temperature regulation system, pH regulation system and pH detector.

2. The device for promoting methanogenesis based on carbon materials according to claim 1, characterized in that: A connecting ring is integrally formed at the upper end of the shell, the upper cover plate is mounted on the connecting ring, and a plurality of fixing bolts are installed between the upper cover plate and the connecting ring.

3. The device for promoting methanogenesis based on carbon materials according to claim 1, characterized in that: The carbon material is one or more combinations of biochar, graphite, carbon-carbon composite material, porous activated carbon and graphene, and the specific surface area of ​​the carbon material is 30-450m 2 / g.

4. The device for promoting methanogenesis based on carbon materials according to claim 1, characterized in that: The aperture of the sieve holes on the screen is smaller than the particle size of the carbon material, a through hole is formed between the screen and the front and rear side walls of the stirring shaft, a feed port is provided on the front and rear side walls of the mounting shell, a plurality of carbon material adding ports are provided on the upper side wall plate of the carbon material containing box, a slide groove is fixedly connected to the inner side walls of the upper and lower wall plates of the mounting shell, a slider is fixedly connected to the upper and lower side walls of the carbon material containing box, the slider is slidably connected in the slide groove, a cover plate is installed on one side of the opening of the mounting shell, and a fixing screw is threadedly connected between the mounting shell and the cover plate.

5. The device for promoting methanogenesis based on carbon materials according to claim 4, characterized in that: A connecting block is fixedly connected between the stirring shaft and the mounting shell, a receiving groove is provided in the stirring shaft, a power line is arranged in the receiving groove, an electrode is installed at one end of the heating plate, and the end of the electrode away from the heating plate is installed on the side wall.

6. The device for promoting methanogenesis based on carbon materials according to claim 1, characterized in that: The pH adjustment system, the temperature adjustment system and the pH detector are signal-connected. The pH detector is provided with a pair of them. A pair of sampling tubes are provided on the side wall of the shell. One end of the pair of sampling tubes away from the shell is installed on the feed port of the pair of pH detectors.

7. A method for using a device for promoting methanogenesis based on carbon materials as described in any one of claims 1 to 6, characterized in that: The method of use includes: S1. Put the sludge into the pretreatment equipment, filter and grind the sludge to obtain mixed sludge; S2. The mixed sludge is transported to the centrifuge drum through the feed pipe, and the sludge is screened by the centrifugal action of the centrifuge drum. At the same time, an auxiliary agent is added to the centrifuge drum through the auxiliary agent feeding port, so that the auxiliary agent is mixed with the sludge in the centrifuge drum; S3. The sieved sludge enters the housing, and when the stirring shaft drives the mounting housing to rotate, the carbon material containing box will be driven to rotate, so that the sludge passes through the screen and contacts the carbon material, thereby promoting DIET through the carbon material; at the same time, the heat generated by the heating plate will contact the sludge, so as to adjust the ambient temperature of the sludge; S4. The pH and temperature of the sludge in different parts of the shell are monitored in real time by a pH detector, and the data are transmitted to the temperature regulation system and the pH regulation system. The pH in the shell is regulated by the pH regulation system, and the temperature in the shell is regulated by the temperature regulation system.

8. The method for using a device for promoting methanogenesis based on carbon materials according to claim 7, characterized in that: The rotation speed of the stirring shaft is 120-240 rpm, the temperature of the sludge in the shell is controlled at 35-40° C., and the pH of the sludge in the shell is controlled at 7-8.

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