CN113969230A - Sand and scum removing and breaking device for anaerobic fermentation tank and sand and scum removing and breaking method - Google Patents
Sand and scum removing and breaking device for anaerobic fermentation tank and sand and scum removing and breaking method Download PDFInfo
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- CN113969230A CN113969230A CN202010721086.2A CN202010721086A CN113969230A CN 113969230 A CN113969230 A CN 113969230A CN 202010721086 A CN202010721086 A CN 202010721086A CN 113969230 A CN113969230 A CN 113969230A
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- C12M—APPARATUS FOR ENZYMOLOGY OR MICROBIOLOGY; APPARATUS FOR CULTURING MICROORGANISMS FOR PRODUCING BIOMASS, FOR GROWING CELLS OR FOR OBTAINING FERMENTATION OR METABOLIC PRODUCTS, i.e. BIOREACTORS OR FERMENTERS
- C12M21/00—Bioreactors or fermenters specially adapted for specific uses
- C12M21/04—Bioreactors or fermenters specially adapted for specific uses for producing gas, e.g. biogas
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- C12M27/00—Means for mixing, agitating or circulating fluids in the vessel
- C12M27/02—Stirrer or mobile mixing elements
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- C12M29/00—Means for introduction, extraction or recirculation of materials, e.g. pumps
- C12M29/06—Nozzles; Sprayers; Spargers; Diffusers
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- C12M29/00—Means for introduction, extraction or recirculation of materials, e.g. pumps
- C12M29/18—External loop; Means for reintroduction of fermented biomass or liquid percolate
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- C12M33/00—Means for introduction, transport, positioning, extraction, harvesting, peeling or sampling of biological material in or from the apparatus
- C12M33/04—Means for introduction, transport, positioning, extraction, harvesting, peeling or sampling of biological material in or from the apparatus by injection or suction, e.g. using pipettes, syringes, needles
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- C12M41/00—Means for regulation, monitoring, measurement or control, e.g. flow regulation
Abstract
The invention belongs to the technical field of solid waste treatment equipment, and particularly relates to a sand-removing and scum-breaking device of an anaerobic fermentation tank, which comprises: a plurality of sand sucking and settling sub-devices, sand sucking pumps (4), cyclone desanders (5), high-pressure water pumps (7), backflow sub-devices and scum pushing sub-devices which are arranged at the bottom of the anaerobic fermentation tank (14); the sand sucking and settling sub-devices are respectively connected to a sand sucking pipe main pipe (32) which is enclosed into a circle through sand sucking port pipes (33) which are respectively connected, and are communicated with a sand sucking pump (4) which is arranged outside the bottom of the anaerobic fermentation tank (14) through the sand sucking pipe main pipe (32); the sand suction pump (4) is connected with the cyclone desander (5), the cyclone desander (5) is connected with the high-pressure water pump (7), and the high-pressure water pump (7) is respectively connected with the reflux sub-device arranged at the middle part outside the anaerobic fermentation tank (14) and the scum pushing sub-device arranged at the top outside the anaerobic fermentation tank (14), so that the problems of scum and sand sedimentation of the anaerobic fermentation tank (14) can be effectively solved.
Description
Technical Field
The invention belongs to the technical field of solid waste treatment equipment, and particularly relates to a sand and scum removing and breaking device and a sand and scum removing and breaking method for an anaerobic fermentation tank.
Background
During the anaerobic fermentation treatment process of the biomass fermentation raw materials, the fermentation raw materials are easy to float on the liquid surface to form scum, especially non-degradable plastic sheets and foams in municipal garbage, and crop straws and other fermentation systems taking lignocellulose as main components. There are two main reasons for scum formation: firstly, the fermentation raw materials contain light plastics and cellulose raw materials, and naturally float upwards in the anaerobic fermentation process; secondly, the surface of the cellulose fermentation raw material is easy to absorb the methane generated by fermentation and floats up passively. After the scum layer is formed, if the scum layer is not cleaned or broken in time, the phenomenon of top filling and crusting is very easy to occur, the thicker scum layer is formed, the effective volume of the reactor is reduced, the methane is difficult to discharge, and even the problem of blocking the discharge pipe orifice is caused.
In addition, fermentation raw materials all can sneak into partial silt more or less at receipts transportation in-process, anaerobic fermentation's front end pretreatment process, the desanding efficiency also can not reach 100%, if do not set up the desanding device in the anaerobic fermentation jar 14, long-term operation back, the sand setting phenomenon can appear at anaerobic fermentation jar 14's tank bottoms, cause jar effective volume of body to reduce, the increase of jar internal wear, agitator output torque increases, serious can arouse the agitator moment of torsion too high, lead to disconnected axle or jar body to collapse.
Currently, the prior art does not place the desliming and descumming in the anaerobic fermentation tank 14 at the same time, resulting in high work efficiency and increased cost.
Set up central agitator at anaerobic fermentation tank's top, this central agitator during operation can form certain internal flow field in anaerobic fermentation tank, is close to the mid portion of central agitator, because the effect of agitator, can the downward flow form middle swirl, is close to the peripheral part of jar wall, can the upflow form whole closed loop that flows. In addition, when the central stirrer works, a plurality of water flow static areas can be formed, and flow vortexes cannot be formed. The problems that accumulated sand is easily formed in a flowing static area at the bottom of the tank, and a scum layer is easily formed in the flowing static area on the liquid surface are caused.
Disclosure of Invention
In order to solve the defects in the prior art, the invention provides a sand-removing and scum-breaking device for an anaerobic fermentation tank, which is characterized by comprising the following components:
a plurality of sand sucking and settling device, a sand sucking pump, a rotational flow desander, a high-pressure water pump, a backflow device and a scum pushing device which are arranged at the bottom of the anaerobic fermentation tank;
the sand sucking and settling sub-devices are respectively connected to a sand sucking pipe main pipe which is encircled into a circle through sand sucking port pipes which are respectively connected, and are communicated with a sand sucking pump arranged outside the bottom of the anaerobic fermentation tank through the sand sucking pipe main pipe; the sand suction pump is connected with the cyclone desander, the cyclone desander is connected with the high-pressure water pump, and the high-pressure water pump is respectively connected with the reflux sub-device arranged in the middle outside the anaerobic fermentation tank and the scum pushing sub-device arranged at the top outside the anaerobic fermentation tank.
As one improvement of the technical scheme, a central stirrer is arranged at the top part in the anaerobic fermentation tank, and a flowing vortex is formed at a position close to the central stirrer, so that the liquid or scum nearby is driven to flow downwards;
the liquid level in the anaerobic fermentation tank is close to the inner wall of the anaerobic fermentation tank, the bottom of the anaerobic fermentation tank is close to the inner wall of the anaerobic fermentation tank, and a first static area, a second static area and a third static area are respectively and correspondingly formed under the central stirrer.
As one improvement of the technical scheme, the first static area is symmetrically provided with a plurality of sand suction ports, each sand suction port is arranged at the bottom of the anaerobic fermentation tank, and each sand suction port is provided with a corresponding sand suction settling sub-device;
the sand sucking and settling device comprises: the sand suction main pipe, the sand suction opening pipe and the sand suction pipe valve; one end of the sand suction port pipe penetrates through the sand suction port and is communicated with a sand suction pipe main pipe arranged on the periphery of the anaerobic fermentation tank, and a sand suction pipe valve is arranged at the joint of the sand suction pipe main pipe and each sand suction port pipe; the other end of the sand suction port pipe is communicated with one end of a sand suction and sedimentation pipe arranged at the bottom in the anaerobic fermentation tank; the other end of the sand suction and sedimentation pipe is communicated with a central sand suction port arranged right below the central stirrer.
As one improvement of the technical scheme, the end part of the sand suction opening pipe is in a wedge-shaped structure.
As one improvement of the technical scheme, the sand suction pump is a wear-resistant slurry pump.
As an improvement of the above technical solution, the cyclone desander comprises: the device comprises a buffer tank, a delivery pump, a hydrocyclone, a sand collecting tank, a spiral sand extracting machine and a liquid level meter;
the top of the buffer tank is provided with a buffer tank feeding hole and a desanded material outlet, the bottom of the buffer tank is provided with a bottom discharging hole, and a liquid level meter is arranged in the buffer tank;
the delivery pump is respectively connected with the bottom discharge outlet and the feed inlet of the hydrocyclone through pipelines;
the top of the hydrocyclone is provided with a hydrocyclone feed inlet which is connected with the buffer tank through a circulating pipeline, and the bottom of the hydrocyclone is provided with a heavy material outlet which is used for discharging separated sand phase to the sand collecting tank; a sand collecting tank is arranged below the hydrocyclone;
a cleaning water inlet is formed in the bottom of the sand collecting tank, and the sand collecting tank is cleaned by an externally arranged cleaning water device;
the spiral sand lifting machine is connected with the sand collecting tank, and the separated sand phase in the sand collecting tank is discharged through the sand discharge pipe.
As an improvement of the above technical solution, the backflow sub-device includes: a return conduit and a return valve; the high-pressure water pump is communicated with the return pipe through a pipeline, one end of the return pipe is arranged at a return inlet positioned at one side, the other end of the return pipe is arranged at a return inlet positioned at the other side, and a return valve is arranged at the joint of the return pipe and the pipeline connected with the high-pressure water pump.
As an improvement of the above technical solution, the scum pushing device includes: the device comprises a plurality of nozzles, a plurality of scum pushing valves and scum pushing pipes; each nozzle is arranged at a sand removing opening formed in the top of the anaerobic fermentation tank, a water outlet of each nozzle faces the inside of the anaerobic fermentation tank, a scum pushing pipe is connected with a water inlet of each nozzle through a pipeline, and a scum pushing valve is arranged at the joint of the pipeline and the scum pushing pipe.
As an improvement of the above technical solution, the apparatus further includes: a controller; the controller is respectively connected with the sand sucking and settling device, the sand sucking pump, the cyclone desander, the high-pressure water pump, the backflow device and the scum pushing device and controls the sand sucking and settling device, the sand sucking pump, the cyclone desander, the high-pressure water pump, the backflow device and the scum pushing device.
The invention also provides a sand and scum removing and breaking method based on the sand and scum removing and breaking device of the anaerobic fermentation tank, which comprises the following steps:
a central stirrer arranged at the top in the anaerobic fermentation tank forms a middle flowing vortex in the stirring process, and the sand-containing liquid flows downwards to a central sand suction port;
pumping the sand-containing liquid from the anaerobic fermentation tank into a cyclone desander outside the anaerobic fermentation tank by a sand suction pump through a sand suction port pipe and a sand suction settling pipe, and performing hydraulic cyclone treatment and sand-water separation to obtain a liquid phase and a sand phase;
the separated sand phase is discharged through a sand discharge pipe, the mode is switched into a backflow mode according to a control instruction of a controller, a backflow valve is opened, the separated liquid phase is pumped into the anaerobic fermentation tank through a high-pressure water pump through a backflow pipe and is mixed with biogas slurry in the anaerobic fermentation tank to form an internal circulation flow field, and the internal circulation flow field continuously flows downwards along with the flowing vortex to form closed circulation desanding;
according to the control instruction of the controller, the mode is switched into a scum breaking mode, a scum pushing valve is opened, and the separated liquid phase is pumped into each nozzle through a scum pushing pipe by a high-pressure water pump;
each nozzle sprays liquid phase to push scum on the biogas liquid level in the anaerobic fermentation tank to the central stirrer, and in the stirring process of the central stirrer, the floating vortex formed in the middle of the central stirrer can downwards flow the pushed scum together to break the scum.
Compared with the prior art, the invention has the beneficial effects that:
(1) the dead zone formed when the central stirrer works is analyzed, a sand suction point and a backflow and slag pushing port are scientifically arranged, and the sand suction and scum breaking efficiency is high;
(2) the scum is driven by the vortex generated by stirring to enter the liquid level again and fully contact with microorganisms for fermentation treatment, so that the utilization efficiency of raw materials is improved, the specific gravity of the scum of the biomass soaked by multiple cycles is increased, the floating performance is weakened, and the scum is discharged along with the biogas slurry during final discharge;
(3) compared with the common independently arranged sand and scum removing and breaking device, the device saves the investment and the operating cost.
Drawings
FIG. 1 is a schematic structural diagram of a sand and scum removing device of an anaerobic fermentation tank of the present invention;
FIG. 2 is a schematic structural diagram of a first static area, a second static area and a third static area of a sand-removing and scum-breaking device of an anaerobic fermentation tank of the present invention;
FIG. 3 is a schematic structural diagram of a sand sucker of the sand-removing and scum-breaking device of the anaerobic fermentation tank, which is arranged at the bottom of the anaerobic fermentation tank 14;
FIG. 4 is a schematic structural view of a cyclone desander 5 of the sand and scum removing device for an anaerobic fermentation tank.
Reference numerals:
1. sand suction port 2 and central sand suction port
3. Sand suction pipe valve 4 and sand suction pump
5. Cyclone sand remover 6 and sand discharge pipe
7. High-pressure water pump 8, return valve
9. Scum pushing valve 10 and nozzle
11. Return pipe 12, central mixer
13. Sand suction pipe 14 and anaerobic fermentation tank
15. A first static area 16 and a second static area
17. Third static area 18, buffer tank
19. Buffer tank feed inlet 20 and material outlet after sand removal
21. Bottom discharge opening 22, circulation conduit
23. Delivery pump 24, hydrocyclone
25. Hydrocyclone inlet 26, heavy material outlet
27. Top discharge port 28 and sand collecting tank
29. Cleaning water inlet 30 and spiral sand lifting machine
31. Level gauge 32 and sand suction header pipe
33. Sand suction pipe 34 and reflux inlet
35. Scum pushing pipe
Detailed Description
The invention will now be further described with reference to the accompanying drawings.
The invention provides a sand-removing and scum-breaking device of an anaerobic fermentation tank, which aims at the problem of settled sand and scum generated by the existing anaerobic fermentation tank 14 in the anaerobic fermentation process, and is provided with a plurality of sand suction ports 1, scum-pushing ports and biogas slurry return ports by combining the flow field characteristics of materials in the tank when a central stirrer 12 arranged at the top in the anaerobic fermentation tank works, so that the two functions of sucking sand and pushing scum are efficiently combined together, and the whole device can be automatically controlled and continuously operated by controlling through a controller, and the problem of scum and settled sand of the anaerobic fermentation tank 14 can be effectively solved.
As shown in fig. 1 and 3, the apparatus includes:
a plurality of sand sucking and settling sub-devices, a sand sucking pump 4, a rotational flow desander 5, a high-pressure water pump 7, a backflow sub-device and a scum pushing sub-device which are arranged at the bottom of the anaerobic fermentation tank 14;
the sand sucking and settling sub-devices are respectively connected to a sand sucking pipe main pipe 32 which is enclosed into a round shape through sand sucking port pipes 33 which are respectively connected, and are communicated with a sand sucking pump 4 which is arranged outside the bottom of the anaerobic fermentation tank 14 through the sand sucking pipe main pipe 32; the sand suction pump 4 is connected with the cyclone desander 5, the cyclone desander 5 is connected with the high-pressure water pump 7, and the high-pressure water pump 7 is respectively connected with the reflux sub-device arranged in the middle outside the anaerobic fermentation tank 14 and the scum pushing sub-device arranged at the top outside the anaerobic fermentation tank 14.
The central stirrer 12 is arranged at the top in the anaerobic fermentation tank 14, and a flowing vortex is formed at a position close to the central stirrer 12, so that the liquid or scum nearby is driven to flow downwards;
as shown in FIG. 2, the liquid level in the anaerobic fermentation tank 14 near the inner wall of the anaerobic fermentation tank 14 and the liquid level in the anaerobic fermentation tank 14 directly below the central agitator 12 form a first static zone 15, a second static zone 16 and a third static zone 17, respectively.
As shown in fig. 3, the first static area 15 is symmetrically provided with a plurality of sand sucking ports 1, each sand sucking port 1 is provided at the bottom of the anaerobic fermentation tank 14, and each sand sucking port 1 is provided with a corresponding sand sucking and settling sub-device, and the sand sucking and settling sub-device comprises: a sand suction pipe main pipe 32, a sand suction port pipe 33 and a sand suction pipe valve 3; one end of the sand suction pipe 33 penetrates through the sand suction port 1 and is communicated with a sand suction pipe main pipe 32 arranged on the periphery of the anaerobic fermentation tank 14, namely, the sand suction pipe main pipe 32 which is to be enclosed into a round shape is provided with a plurality of connecting ports, each connecting port is connected with one end of the sand suction pipe 33, a sand suction pipe valve 3 is arranged at the connecting part of the sand suction pipe main pipe 32 and each sand suction pipe 33, and the sand suction pipe valve 3 is arranged outside the anaerobic fermentation tank 14; the other end of the sand suction port pipe 33 is communicated with one end of a sand suction and sedimentation pipe 13 arranged at the bottom in the anaerobic fermentation tank 14; the other end of the sand suction and setting pipe 13 is communicated with a central sand suction port 2 arranged right below the central stirrer 12.
The end of the sand suction pipe 33 is in a wedge-shaped structure, and the end is communicated with the end of the sand suction and settling pipe 13 to increase the sand suction area.
The sand suction pump 4 is a wear-resistant slurry pump and is used for pumping the sand-containing liquid into the cyclone desander 5.
As shown in fig. 4, the cyclone desander 5 includes: the device comprises a buffer tank 18, a delivery pump 23, a hydrocyclone 24, a sand collecting tank 28, a spiral sand extractor 30 and a liquid level meter 31;
the top of the buffer tank 18 is provided with a buffer tank feeding hole 19 and a desanded material outlet 20, the bottom of the buffer tank is provided with a bottom discharging hole 21, and a liquid level meter 31 is arranged in the buffer tank 18;
the delivery pump 23 is respectively connected with the bottom discharge outlet 21 and the feed inlet 25 of the hydrocyclone through pipelines;
the top of the hydrocyclone 24 is provided with a hydrocyclone feed inlet 25, the hydrocyclone 24 is connected with the buffer tank 18 through the circulating pipeline 22, and the bottom of the hydrocyclone 24 is provided with a heavy material outlet 26 for discharging a sand phase to a sand collecting tank 28; a sand collecting tank 28 is arranged below the hydrocyclone 24;
a cleaning water inlet 29 is arranged at the bottom of the sand collecting tank 28, and the sand collecting tank 28 is cleaned by an externally arranged cleaning water device;
the spiral sand extractor 30 is connected with the sand collection tank 28, discharges sand phase in the sand collection tank 28 from an external sand discharge pipe 6, and reflows the obtained liquid phase after the hydraulic cyclone treatment to the top of the anaerobic fermentation tank 14 through a reflux sub-device for breaking scum. Wherein the sand phase and the liquid phase are obtained after the sand-containing liquid is subjected to hydrocyclone treatment of the hydrocyclone 24.
Wherein, the upper part of the buffer tank is provided with a buffer tank feed inlet 19 and a desanded material outlet 20, the bottom of the buffer tank is provided with a bottom discharge outlet 21 which is connected with a delivery pump 23 through a pipeline, a liquid level meter 31 is arranged in the buffer tank 18 and used for adjusting the delivery capacity of the delivery pump 23, and a circulating pipeline 22 is also connected with a hydrocyclone 24 and the buffer tank 18. The bottom of the buffer tank 18 is designed to be a conical bottom and is made of stainless steel, the tank body is subjected to heat preservation treatment, and the heat preservation treatment method comprises the steps of arranging a heat preservation layer outside the tank body or arranging a heating device and the like. The mixed slurry after primary impurity removal enters the buffer tank 18 to form primary sedimentation so as to enhance the sand removal effect. The top of buffer tank 18 is designed with the foul gas interface of arranging, connects tail gas processing system, prevents secondary pollution.
The delivery pump 23 is connected with the bottom discharge opening 21 arranged at the bottom of the buffer tank 18 and the feed opening of the hydrocyclone 24 through pipelines. The transfer pump 23 is controlled by a variable frequency control by a level gauge 31 in the buffer tank 18. The conveying speed of the conveying pump 23 is higher than the speed of the sand-containing liquid entering the buffer tank 18, so that the sand-containing liquid in the buffer tank 18 can be circularly desanded for a plurality of times through the cyclone desander 5 to enhance the desanding effect.
The hydrocyclone 24 has a top outlet 27 connected to the buffer tank 18 via the recirculation conduit 22 and a bottom heavy matter outlet 26 for discharging heavy matter impurities such as sand into a sand trap 28. The feed opening size of the hydrocyclone 24, the heavy matter outlet 26 size and the design of the top discharge opening 27 are matched to one another. The ratio of the diameter of the feed inlet to the barrel diameter of the cyclone is about 0.5: 1; the ratio of the height of the cylindrical portion of the swirler to the height of the conical portion is about 0.7: 1. The cross-sectional area ratio of the feed inlet of hydrocyclone 24, heavy material outlet 26 and top discharge 27 is 3: 1: 1.2.
the high-pressure water pump 7 pumps the liquid phase into the reflux sub-device to form circulating liquid, and the circulating liquid is mixed with the biogas slurry subjected to anaerobic fermentation treatment in the anaerobic fermentation tank 14, and the anaerobic fermentation is continued to prepare biogas. The backflow sub-device comprises: a return pipe 11 and a return valve 8; the high pressure water pump 7 is communicated with the return pipe 11 through a pipeline, as shown in fig. 1, one end of the return pipe 11 is arranged at the return inlet 34 at the left side, the other end of the return pipe 11 is arranged at the return inlet 34 at the right side, and a return valve 8 is arranged at the connection of the return pipe 11 and the pipeline connected with the high pressure water pump 7 and used for opening or closing the return pipe 11.
The high pressure water pump 7 pumps the liquid phase into the scum pushing device, sprays the liquid phase into the anaerobic fermentation tank 14 through the nozzle 10 arranged at the top of the anaerobic fermentation tank 14, blows scum on the liquid surface in the anaerobic fermentation tank 14 to the central stirrer 12 from the tank wall, flows downwards along with the flowing vortex in the middle, and removes the scum on the liquid surface at the top in the anaerobic fermentation tank 14 through the central sand sucking port 2 positioned right below the central stirrer 12 and through the sand sucking settling pipe 13, the sand sucking port pipe 33, the sand sucking pump 4 and the cyclone sand remover 5. The dross pusher includes: a plurality of nozzles 10, a plurality of dross push valves 9, and a dross push pipe 35; each nozzle 10 is arranged at a sand removing opening formed at the top of the anaerobic fermentation tank 14, the water outlet of each nozzle 10 faces the anaerobic fermentation tank 14, the water inlet of each nozzle 10 is connected with a scum pushing pipe 35 through a pipeline, and a scum pushing valve 9 is arranged at the connection position of the pipeline and the scum pushing pipe 35.
The scum pushing pipe 35 is horizontally arranged, and the scum pushing pipe 35 and the biogas liquid level in the anaerobic fermentation tank 14 are in the same horizontal plane; the end of the nozzle 10 extending into the anaerobic fermentation tank is in a circular arc structure, and a plurality of symmetrical holes are arranged on a circular arc pipeline side by side. Wherein, the nozzles 10 can be symmetrically provided with a plurality of nozzles 10 according to the diameter of the anaerobic fermentation tank 14 by correspondingly increasing the number of the nozzles 10 until the slag pushing requirement is met.
The device further comprises: a controller; the controller is respectively connected with the sand suction and setting sub device, the sand suction pump 4, the cyclone desander 5, the high-pressure water pump 7, the backflow sub device and the scum pushing sub device and is used for controlling the sand suction and setting sub device, the sand suction pump 4, the cyclone desander 5, the high-pressure water pump 7, the backflow sub device and the scum pushing sub device to realize the automatic operation of real-time online sand removal and online scum breaking. Specifically, the controller is respectively connected with the sand suction pipe valve 3, the sand suction pump 4, the cyclone desander 5, the high-pressure water pump 7, the reflux valve 8 and the scum pushing valve 9, and is used for controlling the sand suction pipe valve 3, the sand suction pump 4, the cyclone desander 5, the high-pressure water pump 7, the reflux valve 8 and the scum pushing valve 9, so that sand and scum can be automatically removed and broken. In this embodiment, the controller is a PLC controller.
The sand suction pipe valve 3, the sand suction pump 4, the cyclone desander 5, the high-pressure water pump 7, the reflux valve 8, the scum pushing valve 9 and the joints among the components are all made of wear-resistant and corrosion-resistant materials.
The invention also provides a sand and scum removing and breaking method based on the sand and scum removing and breaking device of the anaerobic fermentation tank 14, which comprises the following steps:
the central stirrer 12 arranged at the top in the anaerobic fermentation tank 14 forms a middle flowing vortex in the stirring process, and the sand-containing liquid flows downwards to the central sand suction port 2;
the sand suction pump 4 pumps the sand-containing liquid from the anaerobic fermentation tank 14 into the cyclone sand remover 5 positioned outside the anaerobic fermentation tank 14 through the sand suction port 1 pipe 33 and the sand suction settling pipe 13, and performs hydraulic cyclone treatment and sand-water separation to obtain a liquid phase and a sand phase;
the separated sand phase is discharged through a sand discharge pipe 6, the mode is switched to a backflow mode according to a control instruction of a controller, a backflow valve 8 is opened, the separated liquid phase is pumped into an anaerobic fermentation tank 14 through a high-pressure water pump 7 and a backflow pipe 11 and is mixed with biogas slurry in the anaerobic fermentation tank 14 to form an internal circulation flow field, and the internal circulation flow field continuously flows downwards along with the flowing vortex to form closed circulation desanding; the flow direction of the separated liquid phase is the same as the flow field flow direction of the flow vortex formed by the central stirrer 12 in the stirring process, so that the internal circulation flow field is enhanced, and the uniformity of biogas slurry in the anaerobic fermentation tank 14 is enhanced;
according to the control instruction of the controller, the mode is switched to a scum breaking mode, a scum pushing valve 9 is opened, and the separated liquid phase passes through a high-pressure water pump 7 and is pumped into each nozzle 10 through a scum pushing pipe 35;
each nozzle 10 sprays liquid phase, scum on the liquid level of biogas slurry in the anaerobic fermentation tank 14 is pushed to the central stirrer 12, and when the central stirrer 12 starts to stir, the floating vortex formed in the middle part of the central stirrer can downwards flow the pushed scum together, so that anaerobic fermentation treatment is continued to prepare biogas, and the utilization rate of raw materials is improved while the scum is broken.
The device has high automation degree, can realize online desanding and scum breaking in the anaerobic fermentation process, and is favorable for improving the operation efficiency of preparing the biogas by anaerobic fermentation.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and are not limited. Although the present invention has been described in detail with reference to the embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (10)
1. The utility model provides an anaerobic fermentation jar degritting broken dross device which characterized in that, the device includes:
a plurality of sand sucking and settling sub-devices, sand sucking pumps (4), cyclone desanders (5), high-pressure water pumps (7), backflow sub-devices and scum pushing sub-devices which are arranged at the bottom of the anaerobic fermentation tank (14);
the sand sucking and settling sub-devices are respectively connected to a sand sucking pipe main pipe (32) which is enclosed into a circle through sand sucking port pipes (33) which are respectively connected, and are communicated with a sand sucking pump (4) which is arranged outside the bottom of the anaerobic fermentation tank (14) through the sand sucking pipe main pipe (32); the sand suction pump (4) is connected with the cyclone desander (5), the cyclone desander (5) is connected with the high-pressure water pump (7), and the high-pressure water pump (7) is respectively connected with a reflux sub-device arranged at the middle part outside the anaerobic fermentation tank (14) and a scum pushing sub-device arranged at the top outside the anaerobic fermentation tank (14).
2. The sand-removing and scum-breaking device for the anaerobic fermentation tank as claimed in claim 1, wherein a central stirrer (12) is arranged at the top inside the anaerobic fermentation tank (14), and a flowing vortex is formed at a position close to the central stirrer (12), so that liquid or scum nearby is driven to flow downwards;
the liquid level in the anaerobic fermentation tank (14) is close to the inner wall of the anaerobic fermentation tank (14), the bottom of the anaerobic fermentation tank (14) is close to the inner wall of the tank, and a first static area (15), a second static area (16) and a third static area (17) are respectively and correspondingly formed under the central stirrer (12).
3. The sand and scum removing and breaking device of the anaerobic fermentation tank as claimed in claim 2, wherein the first static area (15) is symmetrically provided with a plurality of sand suction ports (1), each sand suction port (1) is arranged at the bottom of the anaerobic fermentation tank (14), and each sand suction port (1) is provided with a corresponding sand suction and deposition device;
the sand sucking and settling device comprises: a sand suction main pipe (32), a sand suction opening pipe (33) and a sand suction pipe valve (3); one end of the sand suction port pipe (33) penetrates through the sand suction port (1) and is communicated with a sand suction pipe main pipe (32) arranged on the periphery of the anaerobic fermentation tank (14), and a sand suction pipe valve (3) is arranged at the joint of the sand suction pipe main pipe (32) and each sand suction port pipe (33); the other end of the sand suction port pipe (33) is communicated with one end of a sand suction and sedimentation pipe (13) arranged at the bottom in the anaerobic fermentation tank (14); the other end of the sand suction and sedimentation pipe (13) is communicated with a central sand suction port (2) arranged right below the central stirrer (12).
4. The anaerobic fermentation tank sand and scum removal device according to claim 3, wherein the end of the sand suction pipe (33) is in a wedge-shaped structure.
5. The sand and slag removing device for the anaerobic fermentation tank as claimed in claim 1, wherein the sand pump (4) is a wear-resistant slurry pump.
6. The anaerobic fermenter sand-removing and dross-breaking apparatus of claim 1, wherein the cyclone desander (5) comprises: the device comprises a buffer tank (18), a delivery pump (23), a hydrocyclone (24), a sand collecting tank (28), a spiral sand lifting machine (30) and a liquid level meter (31);
a buffer tank feeding hole (19) and a desanded material outlet (20) are formed in the top of the buffer tank (18), a bottom discharging hole (21) is formed in the bottom of the buffer tank (18), and a liquid level meter (31) is arranged in the buffer tank (18);
the delivery pump (23) is respectively connected with the bottom discharge outlet (21) and the feed inlet (25) of the hydrocyclone through pipelines;
the top of the hydrocyclone (24) is provided with a hydrocyclone feed inlet (25), the hydrocyclone (24) is connected with the buffer tank (18) through a circulating pipeline (22), and the bottom of the hydrocyclone (24) is provided with a heavy material outlet (26) for discharging separated sand phase to a sand collecting tank (28); a sand collecting tank (28) is arranged below the hydraulic cyclone (24);
a cleaning water inlet (29) is arranged at the bottom of the sand collecting tank (28), and the sand collecting tank (28) is cleaned by an externally arranged cleaning water device;
the spiral sand extractor (30) is connected with the sand collecting tank (28), and the separated sand phase in the sand collecting tank (28) is discharged through the sand discharge pipe (6).
7. The anaerobic fermenter sand-removing and scum-breaking apparatus according to claim 1, wherein the backflow sub-apparatus comprises: a return pipe (11) and a return valve (8); the high-pressure water pump (7) is communicated with the return pipe (11) through a pipeline, one end of the return pipe (11) is arranged at the position of the return inlet (34) positioned at one side, the other end of the return pipe (11) is arranged at the position of the return inlet (34) positioned at the other side, and a return valve (8) is arranged at the connecting position of the return pipe (11) and the pipeline connected with the high-pressure water pump (7).
8. The anaerobic fermentation tank degritting and scumming device of claim 1, wherein the scumming device comprises: a plurality of nozzles (10), a plurality of scum pushing valves (9) and a scum pushing pipe (35); each nozzle (10) is arranged at a sand removing opening formed in the top of the anaerobic fermentation tank (14), the water outlet of each nozzle (10) faces the inside of the anaerobic fermentation tank (14), the water inlet of each nozzle (10) is connected with a scum pushing pipe (35) through a pipeline, and a scum pushing valve (9) is arranged at the connection position of the pipeline and the scum pushing pipe (35).
9. The anaerobic fermenter sand-removing and scum-breaking apparatus according to claim 1, further comprising: a controller; the controller is respectively connected with the sand suction and setting sub device, the sand suction pump (4), the cyclone desander (5), the high-pressure water pump (7), the backflow sub device and the scum pushing sub device, and controls the sand suction and setting sub device, the sand suction pump (4), the cyclone desander (5), the high-pressure water pump (7), the backflow sub device and the scum pushing sub device.
10. A sand and scum removing and breaking method based on a sand and scum removing and breaking device of an anaerobic fermentation tank comprises the following steps:
a central stirrer (12) arranged at the top in the anaerobic fermentation tank (14) forms a middle flowing vortex in the stirring process, and the sand-containing liquid flows downwards to the central sand suction port (2);
the sand suction pump (4) pumps the sand-containing liquid from the anaerobic fermentation tank (14) into a cyclone desander (5) positioned outside the anaerobic fermentation tank (14) through a sand suction port pipe (33) and a sand suction settling pipe (13) to carry out hydraulic cyclone treatment and sand-water separation so as to obtain a liquid phase and a sand phase;
the separated sand phase is discharged through a sand discharge pipe (6), the mode is switched into a backflow mode according to a control instruction of a controller, a backflow valve (8) is opened, the separated liquid phase passes through a high-pressure water pump (7), is pumped into an anaerobic fermentation tank (14) through a backflow pipe (11), is mixed with biogas slurry in the anaerobic fermentation tank (14), forms an internal circulation flow field, and continues to flow downwards along with flowing vortex to form closed circulation desanding;
according to a control instruction of the controller, the scum breaking mode is switched to, the scum pushing valve (9) is opened, and the separated liquid phase passes through the high-pressure water pump (7) and is pumped into each nozzle (10) through the scum pushing pipe (35);
each nozzle (10) sprays liquid phase, scum on the liquid level of biogas slurry in the anaerobic fermentation tank (14) is pushed to the central stirrer (12), and in the process that the central stirrer (12) starts to stir, the flowing vortex formed in the middle of the central stirrer and the pushed scum flow downwards together to break the scum.
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| CN202010721086.2A CN113969230A (en) | 2020-07-24 | 2020-07-24 | Sand and scum removing and breaking device for anaerobic fermentation tank and sand and scum removing and breaking method |
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| CN202010721086.2A CN113969230A (en) | 2020-07-24 | 2020-07-24 | Sand and scum removing and breaking device for anaerobic fermentation tank and sand and scum removing and breaking method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115873686A (en) * | 2022-12-21 | 2023-03-31 | 山东利宇环境工程技术有限公司 | Online desanding device of anaerobic fermentation tank |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102888429A (en) * | 2012-09-27 | 2013-01-23 | 北京时代桃源环境科技有限公司 | Pre-processing technology for anaerobic fermentation of kitchen waste |
| CN202823589U (en) * | 2012-07-23 | 2013-03-27 | 北京时代桃源环境科技有限公司 | Kitchen waste rotational flow grit removing system |
| CN103695472A (en) * | 2012-09-27 | 2014-04-02 | 北京时代桃源环境科技有限公司 | Two-phase anaerobic fermentation method for kitchen waste |
| CN204265746U (en) * | 2014-12-07 | 2015-04-15 | 深圳市朗坤环保有限公司 | For combining the desanding device in anaerobism in CSTR retort |
| CN104789467A (en) * | 2015-04-17 | 2015-07-22 | 郑州宇通环保科技有限公司 | Anaerobic-digestion treatment device for food wastes |
| CN205275600U (en) * | 2015-12-29 | 2016-06-01 | 重庆市环卫控股（集团）有限公司 | Kitchen garbage anaerobic jar degritting reflux unit |
| CN106085837A (en) * | 2016-06-29 | 2016-11-09 | 上海浦东环保发展有限公司 | A kind of equipment for changing food waste wet type anaerobism producing methane |
| CN106367334A (en) * | 2016-11-08 | 2017-02-01 | 英普（北京）环境科技有限公司 | Anaerobic jar desanding and scum-removing device and method |
| CN206244781U (en) * | 2016-10-27 | 2017-06-13 | 威德环境科技股份有限公司 | A kind of kitchen rubbish high temperature anaerobic ferment devices |
| CN206985829U (en) * | 2017-07-20 | 2018-02-09 | 光大环保技术研究院（南京）有限公司 | A kind of anaerobic jar desanding device |
| CN208844075U (en) * | 2018-07-17 | 2019-05-10 | 北京首创环境科技有限公司 | A kind of anaerobic fermentation system with desanding function |
| CN216584674U (en) * | 2021-11-23 | 2022-05-24 | 中国华电科工集团有限公司 | Anaerobic fermentation device with sand discharging structure |
-
2020
- 2020-07-24 CN CN202010721086.2A patent/CN113969230A/en active Pending
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202823589U (en) * | 2012-07-23 | 2013-03-27 | 北京时代桃源环境科技有限公司 | Kitchen waste rotational flow grit removing system |
| CN102888429A (en) * | 2012-09-27 | 2013-01-23 | 北京时代桃源环境科技有限公司 | Pre-processing technology for anaerobic fermentation of kitchen waste |
| CN103695472A (en) * | 2012-09-27 | 2014-04-02 | 北京时代桃源环境科技有限公司 | Two-phase anaerobic fermentation method for kitchen waste |
| CN204265746U (en) * | 2014-12-07 | 2015-04-15 | 深圳市朗坤环保有限公司 | For combining the desanding device in anaerobism in CSTR retort |
| CN104789467A (en) * | 2015-04-17 | 2015-07-22 | 郑州宇通环保科技有限公司 | Anaerobic-digestion treatment device for food wastes |
| CN205275600U (en) * | 2015-12-29 | 2016-06-01 | 重庆市环卫控股（集团）有限公司 | Kitchen garbage anaerobic jar degritting reflux unit |
| CN106085837A (en) * | 2016-06-29 | 2016-11-09 | 上海浦东环保发展有限公司 | A kind of equipment for changing food waste wet type anaerobism producing methane |
| CN206244781U (en) * | 2016-10-27 | 2017-06-13 | 威德环境科技股份有限公司 | A kind of kitchen rubbish high temperature anaerobic ferment devices |
| CN106367334A (en) * | 2016-11-08 | 2017-02-01 | 英普（北京）环境科技有限公司 | Anaerobic jar desanding and scum-removing device and method |
| CN206985829U (en) * | 2017-07-20 | 2018-02-09 | 光大环保技术研究院（南京）有限公司 | A kind of anaerobic jar desanding device |
| CN208844075U (en) * | 2018-07-17 | 2019-05-10 | 北京首创环境科技有限公司 | A kind of anaerobic fermentation system with desanding function |
| CN216584674U (en) * | 2021-11-23 | 2022-05-24 | 中国华电科工集团有限公司 | Anaerobic fermentation device with sand discharging structure |
Non-Patent Citations (1)
| Title |
|---|
| 芦汉超: "机械搅拌厌氧消化池流态研究", 中国优秀硕士学位论文库-工程科技I辑 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115873686A (en) * | 2022-12-21 | 2023-03-31 | 山东利宇环境工程技术有限公司 | Online desanding device of anaerobic fermentation tank |
| CN115873686B (en) * | 2022-12-21 | 2023-12-29 | 山东利宇环境工程技术有限公司 | Online sand removal device of anaerobic fermentation tank |
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