CN213738771U - Floating type membrane cover device for collecting methane - Google Patents
Floating type membrane cover device for collecting methane Download PDFInfo
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- CN213738771U CN213738771U CN202022562718.3U CN202022562718U CN213738771U CN 213738771 U CN213738771 U CN 213738771U CN 202022562718 U CN202022562718 U CN 202022562718U CN 213738771 U CN213738771 U CN 213738771U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E50/00—Technologies for the production of fuel of non-fossil origin
- Y02E50/30—Fuel from waste, e.g. synthetic alcohol or diesel
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Abstract
The utility model discloses a floating membrane lid device for collecting marsh gas relates to marsh gas and collects processing technology field. The utility model is arranged at the top of the anaerobic reactor, and the floating type membrane cover device comprises a floating type membrane cover formed by compounding an outer membrane cover, a heat insulation interlayer of a middle layer and an inner insulation membrane, a rainwater collection and falling back structure, a sampling port structure, a buoy structure and a fixed plastic pipe chain; the fixed plastic pipe chain is pressed down on the upper part of the floating type membrane cover to form a rainwater drainage groove facing to the direction of a rainwater collection and falling structure; a biogas collecting and storing space is formed between the floating membrane cover and the inner liquid level of the anaerobic reactor and on the lower periphery side of the connecting position. The utility model discloses a floating type membrane cover can prevent the rainwater collection and the back fall device that marsh gas reveals, prevent effectively that rainwater from forming irregular recess above the membrane cover, also need not use rainwater pump suction rainwater, easy operation, safety; and the sampling and measurement of the wastewater and the sludge in the anaerobic reactor are convenient.
Description
Technical Field
The utility model belongs to the technical field of marsh gas is collected and is handled, especially relate to a floating membrane lid device for collecting marsh gas.
Background
The anaerobic process is widely applied to anaerobic treatment of high-concentration organic wastewater in China, the structural form of the anaerobic reactor can be divided into a square or rectangular civil structure, and the tank body generally adopts a circular structure. According to different designs of the anaerobic reactors, the top of the anaerobic reactor can be designed to be completely closed, can be closed by adopting a concrete structure or a steel structure, and can also be designed to be opened according to different anaerobic technologies, and at the moment, a cover plate or a closed structure is usually required to be added to collect and treat waste gas generated by water flowing out of the top. When the anaerobic reactor with a concrete structure and a completely closed form is adopted, the top of the reactor is completely closed by adopting concrete, so that the problems of high construction cost and inconvenient maintenance exist. In addition, with the improvement of the requirements of domestic environmental protection discharge standards, the treatment of the feces in domestic livestock and poultry breeding industry increasingly becomes an urgent problem facing domestic. At present, the domestic treatment and treatment of the excrement in the livestock and poultry breeding industry generally adopt the following treatment modes: (1) separating solid manure, carrying out anaerobic treatment and then composting, or directly carrying out aerobic composting, treating sewage by adopting a conventional UASB (upflow anaerobic sludge blanket) anaerobic process, building a large-scale stable storage pool with the retention time of 6-12 months for the wastewater after anaerobic treatment, and returning the wastewater to the field in a proper season; (2) the separated sewage is directly treated by anaerobic treatment and methane storage by a large pit-type black film methane tank and returned to the field in a proper season.
In recent years, the black film methane tank has low investment, so that the black film methane tank becomes a large-scale domestic breeding enterprise at present, particularly a large-scale pig raising enterprise with large wastewater generation amount, and a large amount of pig raising wastewater anaerobic treatment storage tanks of the black film methane tank are built. A common black film methane tank is usually in a 'soil pit' form with a slope, namely, a soil pit with the shape shown in figure 1 is dug on the land, HDPE impermeable films are laid at the bottom of the soil pit and on the slope, a wastewater inlet pipe, a wastewater and sludge discharge pipe are arranged after penetrating through the soil pit, a single-layer HDPE impermeable film is adopted at the upper part of the wastewater, and a methane storage space is arranged inside the methane storage space after being bonded with the impermeable film laid at the bottom on the slope, and the methane storage space can be discharged or utilized through a methane discharge pipe 9. The black film methane anaerobic tank in the form has simple structure and low cost, but has the following obvious disadvantages: (1) the bottom adopts a single-layer HDPE film for seepage prevention, when the water amount in the tank is large, the seepage prevention film at the bottom is difficult to maintain a flat state due to the self gravity of the wastewater, and when a certain place is sunken or penetrated by a hard object, the risk of wastewater leakage and groundwater pollution is caused; (2) the top adopts the prevention of seepage membrane of individual layer HDPE to carry out marsh gas collection, when HDPE marsh gas collection membrane is not by marsh gas swell, if there is the rainwater, the rainwater can form a large amount of rainwater recesses at random on the HDPE membrane, can form inhomogeneous, the marsh gas storage space that swells in the middle of these rainwater recesses, the rainwater needs to be pumped with the rainwater pump, and anomalous marsh gas package is difficult to be collected marsh gas delivery pipe all around. Meanwhile, the black film methane tank is very large in area, so that the operation of manually pumping water on the film is very dangerous. (3) Poor heat preservation effect: the cross section area of the black film methane anaerobic tank is often very large, and the single-layer HDPE film is adopted for methane collection, so that the temperature of wastewater in the anaerobic reactor is easy to decrease greatly, which is also a common problem of the black film methane in China at present, so that the treatment effect of the black film methane anaerobic tank is low, and especially under the winter condition, the anaerobic treatment effect is lower.
To the great anaerobic reactor of cross-sectional area (including low-load anaerobic reactor and black membrane marsh gas anaerobism pond), the utility model provides a heat preservation is effectual, conveniently collect rainwater, high floating membrane lid device of security, can be used to the marsh gas of this type of anaerobic reactor and collect.
SUMMERY OF THE UTILITY MODEL
The utility model provides a floating membrane lid device for collecting marsh gas, which solves the problems.
In order to solve the technical problem, the utility model discloses a realize through following technical scheme:
the utility model discloses a floating type membrane cover device for collecting marsh gas, which is arranged at the top of an anaerobic reactor, and comprises a floating type membrane cover formed by compounding an outer layer membrane cover, a heat insulation interlayer of an intermediate layer and an inner layer insulation membrane, a rainwater collection and falling back structure arranged on the floating type membrane cover, a sampling port structure arranged on the floating type membrane cover, a floating barrel structure arranged on the floating type membrane cover and a fixed plastic pipe chain;
one end of the fixed plastic pipe chain is connected with the rainwater collecting and falling structure, and the other end of the fixed plastic pipe chain is connected with the side wall or the buoy structure of the anaerobic reactor, so that the fixed plastic pipe chain is pressed down on the upper part of the floating type membrane cover to form a rainwater drainage groove facing the direction of the rainwater collecting and falling structure;
the rainwater collecting and falling structure is used for guiding the rainwater around to the anaerobic reactor; the sampling port structure is used for collecting the effluent of the anaerobic reactor and evaluating the treatment performance of the anaerobic reactor through detection; the floating drum structure is used for heightening the height of a specific position of the floating type membrane cover, providing fixed support for the fixed plastic pipe chain in the middle of the floating type membrane cover and enabling rainwater to diffuse around the floating drum structure and enter the rainwater drainage groove; and a biogas collecting and storing space is formed between the floating membrane cover and the inner liquid level of the anaerobic reactor and on the lower periphery side of the connecting position.
Furthermore, the rainwater collecting and falling structure comprises a first fixed flange plate, a second fixed flange plate, a first rainwater collecting opening, a rainwater inflow port, a first inclined biogas baffle and an arc-shaped baffle, wherein the first fixed flange plate penetrates through the floating type membrane cover, the rainwater collecting and falling pipe is arranged above the floating type membrane cover, the second fixed flange plate is arranged below the floating type membrane cover, the first rainwater collecting opening is arranged at the top of the rainwater collecting and falling pipe, the rainwater inflow port is arranged at the lower side part of the rainwater collecting and falling pipe, the first inclined biogas baffle is arranged at the bottom of the rainwater collecting and falling pipe, and the arc-shaped baffle is arranged in the rainwater collecting and falling pipe and provided with a second rainwater inflow port on the surface; the rainwater collecting and falling pipe is fixed with the floating type membrane cover through the first upper and lower fixing bolts through the first fixing flange plate and the second fixing flange plate.
Furthermore, the height between the bottom of the rainwater collecting and dropping pipe and the bottom of the isolation membrane is 300mm, and the height between the top of the rainwater collecting and dropping pipe and the membrane cover is 20 mm; the first inclined methane baffle is a closed plug with an inclined plane of 45 degrees; the first rainwater inflow port is a square water passing groove, the height between the top of the first rainwater inflow port and the bottom of the isolation membrane is 50mm, and rainwater enters the anaerobic reactor through the first rainwater inflow port and the second rainwater inflow port.
Furthermore, the sampling port structure comprises a sampling port pipe penetrating through the floating type membrane cover, a third fixed flange plate arranged above the floating type membrane cover, a fourth fixed flange plate arranged below the floating type membrane cover, a sampling pipe orifice arranged above the sampling port pipe, a wastewater inflow port arranged at the lower side part of the sampling port pipe, a second inclined biogas baffle arranged at the bottom of the sampling port pipe, and a waterproof cap arranged at the top of the sampling port pipe through a transverse bolt; and the sampling port pipe is fixed with the floating membrane cover through a third fixed flange and a fourth fixed flange by a second upper and lower fixed bolt.
Further, the distance between the sampling pipe orifice and the floating membrane cover is 200mm, and the height of the sampling pipe orifice below the isolation membrane is 300 mm; the second inclined methane baffle is a closed plug with an inclined plane of 45 degrees; the wastewater inlet is a square water passing groove, and the height between the top of the wastewater inlet and the bottom of the isolation membrane is 50 mm.
Furthermore, the buoy structure comprises a rigid plastic foam disc body arranged between the membrane cover and the isolation membrane, a stainless steel fixed disc arranged on the outer surface of the membrane cover, and a bolt penetrating through the stainless steel fixed disc and the membrane cover and then connected with a bolt hole on the surface of the rigid plastic foam disc body; the bottom of the rigid plastic foam disc body is fixedly bonded with the isolation film; the stainless steel fixing disc is welded with a fixing ring connected with the fixed plastic pipe chain.
Further, fixed type pipe chain of moulding forms after connecting through the nylon rope by a plurality of UPVC counter weight pipe, fill with the concrete in the UPVC counter weight pipe, the pipe both sides are provided with the block, link to each other through the go-between on the block between the two adjacent UPVC counter weight pipes through the nylon rope.
Further, the film cover is a high-strength ultraviolet-resistant ethylene copolymer mixture (EIA) fabric film material.
Furthermore, the heat insulation interlayer of the middle layer is an EPE pearl wool heat insulation interlayer.
Further, the inner-layer isolation film is a HEPE (high efficiency particulate exchange) impermeable film with the thickness of 2 mm.
Compared with the prior art, the utility model following beneficial effect including:
1. the utility model relates to a floating membrane lid device for collecting marsh gas adopts high strength, ultraviolet resistance ethylene copolymerization mixture (EIA) fabric membrane material, and this membrane material compares in HDPE prevention of seepage membrane, has the outstanding advantage that high ultraviolet resistance, high strength, high puncture resistance ability, high leakproofness, adhesion can be good, and the adventitia advantage as floating membrane lid is obvious; meanwhile, because the strength of the membrane cover made of the material is high, an operator can safely perform relevant operations such as sampling and the like on the membrane cover.
2. The utility model discloses an inner membrance adopts conventional HDPE prevention of seepage membrane, and contact waste water has good airtight, heat preservation and anticorrosion effect, and the convention adopts thickness 2 mm's HEPE prevention of seepage membrane.
3. The utility model discloses be located in the middle of adventitia and the inner membrance to with the cotton heat preservation intermediate layer that insulates against heat of inner membrance bonding EPE pearl as an organic whole, play the important effect that prevents heat scattering and disappearing in the anaerobic reactor, for the reaction temperature in the guarantee anaerobic reactor is very important, however the use of this type internal is very few, adopts the cotton foam interlayer of pearl 12 ~ 20mm thick under the conventional design condition.
4. The utility model discloses a floating type membrane cover sets up the rainwater collection and the fall-back device that specially designed, can prevent marsh gas from revealing, collect a plurality of rainwater collection and fall-back mouths through fixing the rainwater of moulding the counter weight pipe chain above the membrane cover, and flow into anaerobic reactor, can prevent effectively that the rainwater from forming irregular recess above the membrane cover, also need not use rainwater pump to suck the rainwater, easy operation, safety;
5. the utility model discloses a floating membrane covers the sample connection that sets up, still can conveniently take a sample and measure waste water and mud in the anaerobic reactor, and this is that current conventional black membrane methane-generating pit anaerobic reactor can't accomplish.
Of course, it is not necessary for any particular product to achieve all of the above-described advantages at the same time.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural view of a floating membrane cover device for collecting biogas of the present invention;
FIG. 2 is a schematic view of a layer structure of the floating membrane cover of FIG. 1 according to the present invention;
FIG. 3 is a diagram illustrating installation of a floating membrane cover of a square anaerobic reactor in example 1 of the present invention;
FIG. 4 is a diagram illustrating installation of a floating membrane cover of the rectangular anaerobic reactor in example 2 of the present invention;
FIG. 5 is a diagram illustrating installation of a floating membrane cover of the circular anaerobic reactor according to embodiment 3 of the present invention;
FIG. 6 is a diagram showing the structure and installation relationship between the rain water collecting and falling structure and the floating membrane cover;
FIG. 7 is a left side view of the structure of FIG. 6;
fig. 8 is a top view of the rainwater collecting and falling structure of the present invention;
FIG. 9 is a diagram showing the structure and installation relationship between the sampling port and the floating membrane cover;
FIG. 10 is a left side view of the structure of FIG. 9;
FIG. 11 is a diagram showing the structure and installation relationship between the floating drum structure and the floating membrane cover according to the present invention;
FIG. 12 is a structural view of a black film methane tank for treating wastewater of a pig farm in the prior art;
in the drawings, the components represented by the respective reference numerals are listed below:
1-an anaerobic reactor, 101-a biogas collecting and storing space, 2-an inner liquid level, 3-a buoy structure, 301-a rigid plastic foam disc body, 302-a stainless steel fixing disc, 303-bolts, 304-bolt holes, 305-a fixing ring, 4-a film cover, 5-a heat insulation interlayer, 6-an isolation film, 7-a fixed molding pipe chain, 8-a rainwater collecting and falling structure, 801-a rainwater collecting and falling pipe, 802-a first fixing flange, 803-a second fixing flange, 804-a rainwater collecting opening, 805-a first inclined biogas baffle, 806-an arc baffle, 807-a second rainwater inlet, 808-a first rainwater inlet, 809-a first upper and lower fixing bolt and 9-a sampling port structure, 901-sampling port pipe, 902-third fixed flange plate, 903-fourth fixed flange plate, 904-sampling pipe orifice, 905-second inclined methane baffle plate, 906-wastewater inflow port, 907-waterproof cap, 908-transverse bolt, 909-second upper and lower fixed bolt and 10-floating membrane cover.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "top", "outer", "intermediate layer", "one end", "side wall", "upper part", and the like, indicate positional or positional relationships for convenience of description only and to simplify the description, and do not indicate or imply that the referenced components or elements must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.
The conventional common pig raising wastewater anaerobic treatment storage pool for the black film methane tank is shown in fig. 12, and the structure specifically comprises wastewater 31 in the black film methane tank, a slope 32 of the black film methane tank, a liquid level 33 in the black film methane tank, a shape 34 of an HDPE (high-density polyethylene) sealed membrane cover under the condition of small methane storage amount, a shape 35 of the HDPE sealed membrane cover swelled by methane under the condition of large methane storage amount, a local rainwater water collection groove 36 of the HDPE sealed methane membrane cover due to the influence of a heavy object (mainly rainwater), and a local biogas bulge groove 37 of the HDPE sealed methane membrane cover due to the influence of a heavy object (mainly rainwater);
the adopted black film methane tank usually adopts a 'soil pit' form with a slope, namely, a soil pit with the shape shown in figure 12 is dug on the land, HDPE impermeable films are laid at the bottom of the soil pit and on the slope, a wastewater inlet pipe, a wastewater and sludge discharge pipe are arranged after penetrating through the soil pit, and a methane storage space is arranged in the upper part of the wastewater after the monolayer HDPE impermeable film is bonded with the impermeable film laid at the bottom of the slope, and the methane can be discharged or utilized through the methane discharge pipe. The black film methane anaerobic tank in the form has simple structure and low cost, but has the following obvious disadvantages: the bottom of the tank is impervious by adopting a single-layer HDPE film, when the water amount in the tank is large, the impervious film at the bottom is difficult to maintain a flat state due to the self gravity of wastewater, and when a certain place is sunken or penetrated by a hard object, the risk of polluting underground water due to the leakage of the wastewater is caused; (2) the top adopts the prevention of seepage membrane of individual layer HDPE to carry out marsh gas collection, when HDPE marsh gas collection membrane is not by marsh gas swell, if there is the rainwater, the rainwater can form a large amount of rainwater recesses at random on the HDPE membrane, can form inhomogeneous, the marsh gas storage space that swells in the middle of these rainwater recesses, the rainwater needs to be pumped with the rainwater pump, and anomalous marsh gas package is difficult to be collected marsh gas delivery pipe all around. Meanwhile, the black film methane tank is very large in area, so that the operation of manually pumping water on the film is very dangerous. (3) Poor heat preservation effect: the cross section area of the black film methane anaerobic tank is often very large, and the single-layer HDPE film is adopted for methane collection, so that the temperature of wastewater in the anaerobic reactor is easy to decrease greatly, which is also a common problem of the black film methane in China at present, so that the treatment effect of the black film methane anaerobic tank is low, and especially under the winter condition, the anaerobic treatment effect is lower.
To the great anaerobic reactor of cross-sectional area (including low-load anaerobic reactor and black membrane marsh gas anaerobism pond), the utility model provides a heat preservation is effectual, conveniently collect rainwater, high floating membrane lid system and device of security can be used to the marsh gas of this type of anaerobic reactor to collect, and concrete scheme is as follows.
Specific example 1:
referring to fig. 1-3 and 6-11, the floating membrane cover device for collecting biogas of the present invention comprises a floating membrane cover 10 formed by compounding an outer membrane cover 4, a middle heat insulation interlayer 5, and an inner isolation membrane 6, a rainwater collection and falling back structure 8 disposed on the floating membrane cover 10, a sampling port structure 9 disposed on the floating membrane cover 10, a float bowl structure 3 mounted on the floating membrane cover 10, and a fixed plastic pipe chain 7, wherein the floating membrane cover is disposed on the top of an anaerobic reactor 1; the periphery of the floating membrane cover 10 is bonded, sealed and fixed with the inner side wall of the anaerobic reactor 1 by angle steel and adhesive;
one end of the fixed plastic pipe chain 7 is connected with the rainwater collection and falling structure 8, and the other end is connected with the side wall of the anaerobic reactor 1 or the floating drum structure 3, so that the fixed plastic pipe chain 7 is pressed down on the upper part of the floating type membrane cover 10 to form a rainwater drainage groove facing the direction of the rainwater collection and falling structure 8;
the rainwater collecting and falling structure 8 is used for guiding the rainwater around to the anaerobic reactor 1; the sampling port structure 9 is used for collecting the effluent of the anaerobic reactor 1 and evaluating the treatment performance of the anaerobic reactor 1 through detection; the floating drum structure 3 is used for heightening the height of a specific position of the floating type membrane cover 10, providing a fixed support for the fixed plastic pipe chain 7 in the middle of the floating type membrane cover 10 and enabling rainwater to diffuse around the floating drum structure 3 and enter the rainwater drainage groove; a biogas collecting and storing space 101 is formed between the floating type membrane cover 10 and the inner liquid level 2 of the anaerobic reactor 1 and is positioned at the lower peripheral side of the connecting position.
The rainwater collecting and falling structure 8 comprises a rainwater collecting and falling pipe 801 penetrating through the floating type membrane cover 10, a first fixed flange plate 802 arranged above the floating type membrane cover 10, a second fixed flange plate 803 arranged below the floating type membrane cover 10, a rainwater collecting opening 804 arranged at the top of the rainwater collecting and falling pipe 801, a first rainwater inflow port 808 arranged at the lower side part of the rainwater collecting and falling pipe 801, a first inclined biogas baffle 805 arranged at the bottom of the rainwater collecting and falling pipe 801, and an arc baffle 806 arranged in the rainwater collecting and falling pipe 801 and provided with a second rainwater inflow port 807 on the surface; the rainwater collecting and falling pipe 801 is fixed with the floating membrane cover 10 through the first upper and lower fixing bolts 809 by the first fixing flange 802 and the second fixing flange 803.
Wherein, the height between the bottom of the rainwater collecting and dropping pipe 801 and the bottom of the isolation membrane 6 is 300mm, and the height between the top of the rainwater collecting and dropping pipe 801 and the membrane cover 4 is 20 mm; the first inclined biogas baffle 805 is a closed plug with an inclined surface of 45 degrees; the first rainwater inlet 808 is a square water passing groove, the height between the top of the first rainwater inlet 808 and the bottom of the isolation membrane 6 is 50mm, and rainwater enters the anaerobic reactor 1 through the first rainwater inlet 808 and the second rainwater inlet 807.
The sampling port structure 9 comprises a sampling port pipe 901 penetrating through the floating membrane cover 10, a third fixed flange plate 902 arranged above the floating membrane cover 10, a fourth fixed flange plate 903 arranged below the floating membrane cover 10, a sampling pipe orifice 904 arranged above the sampling port pipe 901, a wastewater inlet 906 arranged at the lower side part of the sampling port pipe 901, a second inclined methane baffle 905 arranged at the bottom of the sampling port pipe 901, and a waterproof cap 907 arranged at the top of the sampling port pipe 901 through a transverse bolt 908; the sampling port 901 is fixed to the floating cover 10 via a third fixing flange 902 and a fourth fixing flange 903 by second upper and lower fixing bolts 909.
The diameter DN200 of the sampling port pipe 901, the height above water (above a membrane cover outer membrane) of 200mm and the depth under water (below the membrane cover inner membrane) of 300mm are respectively arranged, and the sampling port device is fixed on the floating membrane cover through a flange positioned on one side of the inner membrane and a flange positioned on one side of the outer membrane. The bottom of the sampling port device is provided with a closed plug with a 45-degree inclined plane, the upper part of the plug is provided with a square water passing groove with the width of 60mm on a pipe under water, and the top of the water passing groove is 50mm away from the inner membrane. Biogas generated at the lower part of the sampling port in the anaerobic reactor 1 is guided to the periphery of the underwater part of the sampling pipe by the inclined plug and rises to the lower part of the inner membrane of the floating membrane cover, and because the top of the water passing groove is 50mm away from the inner membrane, the rising biogas cannot overflow from the water passing groove, but diffuses towards the periphery of the reactor and is collected into a biogas storage chamber at the periphery of the anaerobic reactor; the second inclined biogas baffle 905 is a closed plug with an inclined plane of 45 degrees; the wastewater inlet 906 is a square water passing groove, and the height between the top of the wastewater inlet 906 and the bottom of the isolation membrane 6 is 50 mm; the sampling pipe 901 can directly collect the waste water in the pipe (i.e. the effluent of the anaerobic reactor), and through detecting to evaluate the treatment performance of the anaerobic reactor, it can penetrate the water tank through the special sludge sampling pipe and go deep into the anaerobic reactor, and can collect the anaerobic sludge concentration at different heights in the anaerobic reactor, thereby calculating the total sludge amount of the whole body in the anaerobic reactor, and evaluating whether the treatment capacity of the anaerobic reactor meets the requirement of the total amount of the influent pollutants.
The buoy structure 3 comprises a rigid plastic foam disc body 301 arranged between a membrane cover 4 and an isolation membrane 6, a stainless steel fixing disc 302 arranged on the outer surface of the membrane cover 4, and a bolt 303 penetrating through the stainless steel fixing disc 302 and the membrane cover 4 and connected with a bolt hole 304 on the surface of the rigid plastic foam disc body 301; the bottom of the rigid plastic foam disc body 301 is fixedly bonded with the isolation film 6; a fixed ring 305 connected with the fixed plastic pipe chain 7 is welded on the stainless steel fixed disc 302; the diameter of the rigid plastic foam disc body 301 is 1.5-2 mm conventionally, and the height is 300-500 mm.
Wherein, fixed type pipe chain 7 of moulding forms after connecting through the nylon rope by a plurality of UPVC counter weight pipe, and the intraductal concrete that fills up of UPVC counter weight, the pipe both sides are provided with the block, and the go-between that passes through on the block between the two adjacent UPVC counter weight pipes links to each other through the nylon rope.
Wherein, the membrane cover 4 is made of XR-5 material with high strength and ultraviolet resistance, and the outer membrane is made of ethylene copolymer mixture (EIA) fabric membrane material produced by SEAMAN company of America; compared with an HDPE anti-seepage membrane, the membrane material has the outstanding advantages of high ultraviolet resistance, high strength, high puncture resistance, high leakproofness and good bonding performance, and has obvious advantages as an outer membrane of a floating membrane cover; meanwhile, because the strength of the membrane cover made of the material is high, an operator can safely perform relevant operations (such as sampling and the like) on the membrane cover.
Wherein, the heat insulation interlayer 5 of the middle layer is an EPE pearl cotton heat insulation interlayer; playing an important role in preventing heat dissipation in the anaerobic reactor, being very important for guaranteeing the reaction temperature in the anaerobic reactor, however, the use of the type in China is very little, and a 12-20 mm thick pearl wool foam interlayer is adopted under the conventional design condition. According to different sizes of the tank walls or the tank walls of different projects, the inner film and the middle heat-insulation interlayer are spliced and bonded into a whole in advance in a factory, the outer film is a single layer, and the three layers of films are rolled into a whole so as to be convenient for field installation. In case of the design with the buoys, the buoys need to be fixed at the designed positions in advance. When in installation, the integrated membrane cover is unfolded on the water surface, and the periphery of the membrane cover is fixed on the periphery of the pool wall or the tank wall
Wherein, the inner layer of the isolation film 6 is a HEPE (high efficiency particulate exchange) anti-seepage film with the thickness of 2mm, contacts with wastewater, and has good sealing, heat preservation and anti-corrosion effects;
wherein, the anaerobic reactor 1 adopts a square anaerobic reactor, the floating type membrane cover 10 adopts a square structure corresponding to the square anaerobic reactor, the float bowl structure 3 is arranged in the middle position, and sampling port structures 9 are symmetrically arranged at two sides of the float bowl structure 3; rainwater collecting and falling structures 8 are respectively arranged above and below the sampling port structure 9, and the rainwater collecting and falling structures 8 are respectively connected with the side wall of the anaerobic reactor 1 and the buoy structure 3 through fixed molding pipe chains 7;
the design quantity of the rainwater collecting and falling structure 8 is different according to the size and the shape of the anaerobic reactor 1, the conventional square or circular reactor is provided with a floating barrel in the middle, the quantity of rainwater collecting openings is 4, and the positions of 4 rainwater openings are positioned between the floating barrel and the pool wall and are positioned at the distance from the floating barrel 1/3. After the rainwater collecting and falling-back device is installed, the fixed plastic pipe chain 7 is arranged and fixed on the pool wall or the tank wall along the pipe chain included angle connected with the buoy structure 3 at the position of 120 degrees, and under the weight action of the fixed plastic pipe chain, a concave groove capable of overflowing rainwater is formed on the floating type film cover along the fixed plastic pipe chain 7, and the surrounding rainwater is drained to a rainwater port and flows into the anaerobic reactor 1.
The number and the installation place of the sampling port structures 9 are not fixed, and the sampling port devices can be installed at the positions needing monitoring and sampling according to different designs of the anaerobic reactor 1, and the sampling port devices can be omitted if the sampling at the top is not needed. The fixed plastic pipe chain 7 is placed on the membrane cover and forms a rainwater drainage groove on the membrane cover through the weight of the fixed plastic pipe chain, is heavy, can prevent the membrane cover system from being swelled by biogas, and is beneficial to diffusing the biogas below the membrane cover to the tank wall or the tank wall along the membrane cover.
Specific example 2:
this embodiment differs from embodiment 1 in that,
the anaerobic reactor 1 adopts a rectangular anaerobic reactor, the floating type membrane cover 10 adopts a rectangular structure corresponding to the rectangular anaerobic reactor, a rainwater collecting and falling back structure 8 and a sampling port structure 9 are arranged between the two inner side walls of the anaerobic reactor 1, and the rainwater collecting and falling back structure 8 is connected with the two side walls of the rectangular anaerobic reactor through a fixed molding pipe chain 7; under the condition of a rectangular anaerobic reactor, the plastic-molded fixed counterweight pipe chains are arranged in the anaerobic width direction, so that the rainwater can be drained into the anaerobic reactor by designing the rainwater collecting port to a certain position on the linear pipe chain without arranging a floating barrel; the floating drum structure 3 is used for heightening the height of a floating type membrane cover at a certain position in the anaerobic reactor, provides fixed support for fixing the plastic pipe chain 7 in the middle of the membrane cover, and enables rainwater to diffuse around the floating drum instead of forming a groove.
Specific example 3:
this embodiment differs from embodiment 1 in that,
the anaerobic reactor 1 adopts a circular anaerobic reactor, the floating type membrane cover 10 adopts a circular structure corresponding to the circular anaerobic reactor, the floating cylinder structure 3 is arranged in the middle, and a rainwater collecting and falling structure 8 and a sampling port structure 9 are arranged around the periphery of the floating cylinder structure 3; the rainwater collecting and falling structure 8 is respectively connected with the peripheral side wall of the circular anaerobic reactor and the float structure 3 through a fixed molding pipe chain 7.
The implementation steps of the technical scheme are as follows:
under the conventional condition, the combined floating membrane cover system is used as a methane collecting membrane cover at the top of an anaerobic reactor, the liquid level in the anaerobic reactor is a constant value, the liquid level in the anaerobic reactor keeps a height difference of 0.5-1 m with the peripheral tank wall or tank wall of the reactor, after the periphery of the combined floating membrane cover system is connected, sealed and fixed with the peripheral tank wall or tank wall of the reactor, except that a certain space can be formed by the peripheral membrane cover system and the tank wall or tank wall of the anaerobic reactor, other parts of the membrane cover system can float on the liquid level of the anaerobic reactor, and due to the buoyancy of liquid, the membrane cover can bear certain pressure, so that an operator or an installer can conveniently operate on the membrane cover. According to different use scenes, whether a middle floating drum needs to be arranged on the floating type membrane cover system or not can be determined to facilitate rainwater drainage, the diameter of the floating drum is generally 1.5-2 m, the floating drum needs to be positioned in advance and bonded with an HDPE (high-density polyethylene) membrane, and the upper part of the floating drum can be fixed with an outer membrane by bolts by adopting a stainless steel disc with a handle.
After the membrane lid is fixed to be accomplished, can collect and fall back the device according to the rainwater drainage mouth position installation rainwater that sets up, the device adopts stainless steel SS216L material preparation, pipe diameter 200 mm. Then the fixed plastic type counterweight pipe chain is arranged along three directions of the rainwater collecting and falling back device to the outside and is fixed at a set position. The concrete is filled in the balance weight pipe, under the action of the fixed plastic type balance weight pipe chain, the collected rainwater on the floating type membrane cover is drained to each rainwater collection and fall back port, and falls back to the interior of the anaerobic reactor, so that the problem that the rainwater needs to be pumped by a water suction pump to be collected on the membrane cover is avoided. Simultaneously, a sampling opening is arranged at a place, which is required to collect wastewater and sludge in the anaerobic reactor, on the floating type membrane cover system, and the sampling opening is tightly covered with a waterproof cap at the upper part after sampling is completed so as to prevent rainwater and sundries from entering and overflow of waste gas.
By using the floating membrane cover system and the anaerobic reactor of the device, the generated biogas is guided to the space around the anaerobic reactor, namely the biogas collecting and storing space 101. The biogas in the biogas collection and storage space 101 is pumped out by an external biogas blower for treatment or utilization, so that the biogas pressure in the biogas storage chamber is maintained at a certain negative pressure condition. The biogas storage chamber is internally provided with a pressure sensor, the set pressure range is usually-300 Pa to +20Pa, and biogas is pumped by a variable-frequency biogas pumping fan. The pressure in the methane storage chamber is maintained at-80 Pa-0 Pa under the normal operation condition, when the pressure in the methane storage chamber is lower than-300 Pa, the methane suction fan needs to be closed, and when the pressure in the methane storage chamber exceeds 20Pa, the suction capacity of the methane needs to be increased through frequency conversion or a standby fan needs to be started to increase the suction capacity of the methane.
This membrane lid system and device are collected to neotype floating marsh gas not only can effectively collect the marsh gas that anaerobic system produced, still makes anaerobic reactor's maintenance become simpler, can conveniently tear open the membrane lid in order to carry out the maintenance and the maintenance of anaerobic reactor internals (like three-phase separator etc.), long service life. By adding the biogas drainage groove, the device can also be used for collecting biogas of an anaerobic reactor with constantly changing liquid level, such as a black film biogas anaerobic tank, and has wide application prospect.
Has the advantages that:
1. the utility model relates to a floating membrane lid device for collecting marsh gas adopts high strength, ultraviolet resistance ethylene copolymerization mixture (EIA) fabric membrane material, and this membrane material compares in HDPE prevention of seepage membrane, has the outstanding advantage that high ultraviolet resistance, high strength, high puncture resistance ability, high leakproofness, adhesion can be good, and the adventitia advantage as floating membrane lid is obvious; meanwhile, because the strength of the membrane cover made of the material is high, an operator can safely perform relevant operations such as sampling and the like on the membrane cover.
2. The utility model discloses an inner membrance adopts conventional HDPE prevention of seepage membrane, and contact waste water has good airtight, heat preservation and anticorrosion effect, and the convention adopts thickness 2 mm's HEPE prevention of seepage membrane.
3. The utility model discloses be located in the middle of adventitia and the inner membrance to with the cotton heat preservation intermediate layer that insulates against heat of inner membrance bonding EPE pearl as an organic whole, play the important effect that prevents heat scattering and disappearing in the anaerobic reactor, for the reaction temperature in the guarantee anaerobic reactor is very important, however the use of this type internal is very few, adopts the cotton foam interlayer of pearl 12 ~ 20mm thick under the conventional design condition.
4. The utility model discloses a floating type membrane cover sets up the rainwater collection and the fall-back device that specially designed, can prevent marsh gas from revealing, collect a plurality of rainwater collection and fall-back mouths through fixing the rainwater of moulding the counter weight pipe chain above the membrane cover, and flow into anaerobic reactor, can prevent effectively that the rainwater from forming irregular recess above the membrane cover, also need not use rainwater pump to suck the rainwater, easy operation, safety;
5. the utility model discloses a floating membrane covers the sample connection that sets up, still can conveniently take a sample and measure waste water and mud in the anaerobic reactor, and this is that current conventional black membrane methane-generating pit anaerobic reactor can't accomplish.
The preferred embodiments of the present invention disclosed above are intended only to help illustrate the present invention. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and its practical applications, to thereby enable others skilled in the art to best understand the invention for and utilize the invention. The present invention is limited only by the claims and their full scope and equivalents.
Claims (10)
1. A floating type membrane cover device for collecting methane is arranged at the top of an anaerobic reactor (1) and is characterized by comprising a floating type membrane cover (10) formed by compounding an outer layer membrane cover (4), a middle layer heat insulation interlayer (5) and an inner layer isolation membrane (6), a rainwater collecting and falling back structure (8) arranged on the floating type membrane cover (10), a sampling port structure (9) arranged on the floating type membrane cover (10), a floating barrel structure (3) arranged on the floating type membrane cover (10) and a fixed plastic pipe chain (7);
one end of the fixed plastic pipe chain (7) is connected with the rainwater collecting and falling structure (8), and the other end of the fixed plastic pipe chain is connected with the side wall of the anaerobic reactor (1) or the buoy structure (3), so that the fixed plastic pipe chain (7) is pressed down on the upper part of the floating type membrane cover (10) to form a rainwater drainage groove facing the direction of the rainwater collecting and falling structure (8); and a biogas collection and storage space (101) is formed between the floating membrane cover (10) and the inner liquid level (2) of the anaerobic reactor (1) and is positioned at the lower peripheral side of the connecting position.
2. The floating membrane cover device for collecting biogas as recited in claim 1, wherein the rainwater collecting and falling structure (8) comprises a rainwater collecting and falling pipe (801) penetrating the floating membrane cover (10), a first fixing flange (802) disposed above the floating membrane cover (10), a second fixing flange (803) disposed below the floating membrane cover (10), a rainwater collecting opening (804) disposed at the top of the rainwater collecting and falling pipe (801), a first rainwater inflow port (808) disposed at the lower side of the rainwater collecting and falling pipe (801), a first inclined biogas baffle (805) disposed at the bottom of the rainwater collecting and falling pipe (801), and an arc baffle (806) disposed in the rainwater collecting and falling pipe (801) and having a second rainwater inflow port (807) formed on the surface thereof; the rainwater collecting and dropping pipe (801) is fixed with the floating type membrane cover (10) through a first upper fixing bolt (809) and a second upper fixing bolt (809) through a first fixing flange plate (802) and a second fixing flange plate (803).
3. A floating membrane cover device for collecting biogas, according to claim 2, characterized in that the height between the bottom of the rainwater collection and drop pipe (801) and the bottom of the insulating membrane (6) is 300mm, the height between the top of the rainwater collection and drop pipe (801) and the membrane cover (4) is 20 mm; the first inclined methane baffle (805) is a closed plug with an inclined plane of 45 degrees; the first rainwater inflow port (808) is a square water passing groove, the height between the top of the first rainwater inflow port (808) and the bottom of the isolation membrane (6) is 50mm, and rainwater enters the anaerobic reactor (1) through the first rainwater inflow port (808) and the second rainwater inflow port (807).
4. The floating membrane cover device for collecting biogas as recited in claim 1, wherein the sampling port structure (9) comprises a sampling port pipe (901) penetrating the floating membrane cover (10), a third fixed flange (902) disposed above the floating membrane cover (10), a fourth fixed flange (903) disposed below the floating membrane cover (10), a sampling port pipe orifice (904) disposed above the sampling port pipe (901), a wastewater inlet (906) disposed at the lower side of the sampling port pipe (901), a second inclined biogas baffle (905) disposed at the bottom of the sampling port pipe (901), and a waterproof cap (907) mounted at the top of the sampling port pipe (901) by a transverse bolt (908); the sampling port pipe (901) is fixed with the floating membrane cover (10) through a third fixed flange plate (902) and a fourth fixed flange plate (903) by second upper and lower fixed bolts (909).
5. A floating membrane cover device for collecting biogas according to claim 4, characterized in that the sampling pipe orifice (904) is 200mm from the floating membrane cover (10), the sampling pipe orifice (901) is 300mm in height below the isolation membrane (6); the second inclined methane baffle (905) is a closed plug with an inclined plane of 45 degrees; the wastewater inlet (906) is a square water passing groove, and the height between the top of the wastewater inlet (906) and the bottom of the isolation membrane (6) is 50 mm.
6. A floating membrane cover device for collecting biogas according to claim 1, characterized in that the pontoon structure (3) comprises a rigid plastic foam disc body (301) arranged between the membrane cover (4) and the insulating membrane (6), a stainless steel fixed disc (302) arranged on the outer surface of the membrane cover (4), bolts (303) penetrating through the stainless steel fixed disc (302) and the membrane cover (4) and then connected with bolt holes (304) on the surface of the rigid plastic foam disc body (301); the bottom of the rigid plastic foam disc body (301) is fixedly bonded with the isolation film (6); the stainless steel fixing disc (302) is welded with a fixing ring (305) connected with the fixed molding pipe chain (7).
7. The floating type membrane cover device for collecting methane as claimed in claim 1, wherein the fixed plastic pipe chain (7) is formed by connecting a plurality of UPVC counter weight pipes through nylon ropes, the UPVC counter weight pipes are filled with concrete, caps are arranged on two sides of each pipe, and two adjacent UPVC counter weight pipes are connected through connecting rings on the caps through the nylon ropes.
8. A floating membrane cover device for collecting biogas according to claim 1, characterized in that the membrane cover (4) is a high strength uv resistant ethylene co-polymer (EIA) fabric membrane.
9. A floating membrane cover device for collecting biogas as claimed in claim 1, characterized in that the heat insulating interlayer (5) of the intermediate layer is an EPE pearl wool heat insulating interlayer.
10. A floating membrane cover device for collecting biogas according to claim 1, characterized in that the inner insulating membrane (6) is a HEPE impermeable membrane with a thickness of 2 mm.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112320943A (en) * | 2020-11-09 | 2021-02-05 | 上海复森环境科技发展有限公司 | Floating type membrane cover device for collecting methane |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112320943A (en) * | 2020-11-09 | 2021-02-05 | 上海复森环境科技发展有限公司 | Floating type membrane cover device for collecting methane |
| CN112320943B (en) * | 2020-11-09 | 2025-05-16 | 上海复森环境科技发展有限公司 | A floating membrane cover device for collecting biogas |
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