CN212128146U - Methane pressure reducing device for anaerobic fermentation reactor - Google Patents
Methane pressure reducing device for anaerobic fermentation reactor Download PDFInfo
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- CN212128146U CN212128146U CN202020344388.8U CN202020344388U CN212128146U CN 212128146 U CN212128146 U CN 212128146U CN 202020344388 U CN202020344388 U CN 202020344388U CN 212128146 U CN212128146 U CN 212128146U
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Abstract
The utility model discloses a marsh gas pressure relief device for anaerobic fermentation reactor, wherein, the lower part of the clapboard is provided with a communicating hole to ensure that the bottoms of a first packing chamber and a second packing chamber are communicated to form a communicating vessel, the bottom of an air inlet guide pipe penetrates through the first packing chamber from bottom to top, the top of the second packing chamber is provided with an overflow marsh gas exhaust interface, the packing chamber is filled with liquid packing which is not lower than the communicating hole, and the part of the air inlet guide pipe, which is positioned in the first packing chamber, is provided with an opening; two air inlets of the exhaust device are respectively and correspondingly communicated with the methane exhaust interface and the overflow methane exhaust interface, the upper end of an air inlet pipe of the secondary pressure reducing device is fixed with a rupture disk through a flange interface, and the pressure in a methane hole directly acts on the rupture disk; the pressure limit of the secondary pressure relief device is greater than the pressure limit of the primary pressure relief device. Through the technical scheme of the utility model, effectively reduced anaerobic fermentation reactor biogas pressure to the safety of protection anaerobic fermentation reactor.
Description
Technical Field
The utility model relates to the technical field of anaerobic biogas production, in particular to a biogas pressure reducing device for an anaerobic fermentation reactor.
Background
Along with the construction development of big-and-middle-sized marsh gas engineering, the anaerobic fermentation reactor is constantly updated, and the shortcoming constantly obtains overcoming, and the material of anaerobic fermentation reactor gradually develops to steel jar body direction from the reinforced concrete pond gradually for the reactor design is more nimble, and construction speed promotes by a wide margin, has proposed higher requirement to the pressure control and the pressure protection of anaerobic fermentation reactor simultaneously, consequently needs the appearance that is fit for the pressure protection device of anaerobic fermentation reactor urgently.
SUMMERY OF THE UTILITY MODEL
To the weak point that exists in the above-mentioned problem, the utility model provides a marsh gas pressure relief device for anaerobic fermentation reactor through set up two-stage pressure relief device on anaerobic fermentation reactor, has two-stage pressure release decompression function, simple structure, sensitivity, accuracy, tight, do not have the leakage, discharge capacity is strong, can effectively reduce anaerobic fermentation reactor marsh gas pressure, prevent that anaerobic fermentation reactor from producing accidents such as damaged, tear, marsh gas reveals because of the pressure is too high to protection anaerobic fermentation reactor safety.
In order to achieve the above object, the present invention provides a biogas pressure reducing device for an anaerobic fermentation reactor, comprising: the device comprises a base, a primary pressure reducing device, a secondary pressure reducing device and an exhaust device; the base is hermetically connected with a biogas hole of the anaerobic fermentation reactor through a flange; the first-stage pressure reducing device comprises a packing chamber, a partition plate and an air inlet flow guide pipe, the edge of the bottom of the packing chamber is hermetically fixed on the base, the filling chamber is divided into a first filling chamber and a second filling chamber by the clapboard, the lower part of the clapboard is provided with a communication hole so that the first filling chamber is communicated with the bottom of the second filling chamber to form a communicating vessel, the bottom of the air inlet guide pipe penetrates through the first packing chamber from bottom to top, the base is provided with a first air inlet corresponding to the air inlet guide pipe, so that the bottom of the air inlet guide pipe is communicated with a biogas hole of the anaerobic fermentation reactor, the top of the air inlet guide pipe forms a methane exhaust interface, the top of the second packing chamber is provided with an overflow methane exhaust interface, liquid filler which is not lower than the communicating hole is filled in the filling chamber, and an opening is formed in the part, located in the first filling chamber, of the air inlet flow guide pipe; the exhaust device is provided with two air inlets and two air outlets, the two air inlets are respectively a methane air inlet interface and an overflow methane air inlet interface and are respectively correspondingly communicated with the methane exhaust interface and the overflow methane exhaust interface, the two air outlets are respectively a methane exhaust port and a first overflow methane exhaust port, the methane exhaust port is communicated with the methane air inlet interface through a pipeline, and the first overflow methane exhaust port is respectively communicated with the methane air inlet interface and the overflow methane air inlet interface through a pipeline; the second-stage pressure reducing device comprises an air inlet pipe and a rupture disk, the lower end of the air inlet pipe is hermetically fixed on the base, the upper end of the air inlet pipe is fixedly provided with the rupture disk through a flange interface, and the base is provided with a second air inlet corresponding to the position of the rupture disk, so that the pressure in a methane hole of the anaerobic fermentation reactor directly acts on the rupture disk; the pressure limit of the secondary pressure relief device is greater than the pressure limit of the primary pressure relief device.
In the above technical solution, preferably, when biogas enters the air intake flow guide pipe from the first air inlet, the biogas pressure acts on the upper surface of the liquid filler in the first filler chamber through the opening hole of the air intake flow guide pipe, so that the biogas pressure at which the liquid filler in the first filler chamber drops to the height of the communication hole is the pressure limit value of the primary pressure reduction device.
In the above technical solution, preferably, a gas pressure sensor is arranged at the top of the first filling chamber, a liquid level indicator is arranged at the upper part of the side wall of the second filling chamber, and a drain outlet is arranged at the lower part of the side wall of the second filling chamber.
In the above technical solution, preferably, the base is formed by processing a ribbed steel plate, and a sealing ring is arranged between the base and a biogas hole of the anaerobic fermentation reactor and is fastened by a bolt.
In the above technical solution, preferably, the stuffing chamber of the primary pressure reducing device and the air inlet pipe of the secondary pressure reducing device are welded and fixed to the upper surface of the base.
In the above technical solution, preferably, the secondary pressure reducing device further includes a protective cover, the protective cover is covered above the rupture disk, the protective cover is fixed on the flange interface, and the protective cover is a second overflow methane discharge port when the rupture disk is ruptured.
In the above technical solution, preferably, the methane pressure at which the rupture disk is ruptured is a pressure limit value of the secondary pressure reduction device.
In the above technical solution, preferably, the biogas outlet is communicated with a rear-end biogas utilization device, and the first overflow biogas discharge port is communicated with the atmosphere.
Compared with the prior art, the beneficial effects of the utility model are that: the anaerobic fermentation reactor is provided with the two-stage pressure reducing device, has two-stage pressure reducing function, is simple, sensitive, accurate and tight in structure, has no leakage and strong discharge capacity, effectively reduces the methane pressure of the anaerobic fermentation reactor, and prevents the anaerobic fermentation reactor from generating accidents of damage, tearing, methane leakage and the like due to overhigh pressure, thereby protecting the safety of the anaerobic fermentation reactor.
Drawings
FIG. 1 is a schematic view of a biogas pressure reducing device for an anaerobic fermentation reactor according to an embodiment of the present invention;
FIG. 2 is a top view of a biogas pressure reducing device for an anaerobic fermentation reactor according to an embodiment of the present invention;
FIG. 3 is a schematic view of the cross-sectional structure A-A of the embodiment shown in FIG. 2;
fig. 4 is a schematic structural view of a primary pressure reducing device according to an embodiment of the present invention;
fig. 5 is a schematic structural view of a two-stage pressure reducing device according to an embodiment of the present invention;
fig. 6 is a schematic structural view of an exhaust device according to an embodiment of the present invention;
fig. 7 is a schematic top view and a schematic front view of a base according to an embodiment of the present invention.
In the drawings, the correspondence between each component and the reference numeral is:
1. the anaerobic fermentation device comprises a base, 11, a first air inlet, 12, a second air inlet, 2, a primary pressure reducing device, 21, a filling chamber, 211, a first filling chamber, 212, a second filling chamber, 22, a partition plate, 221, a communication hole, 23, an air inlet guide pipe, 231, an opening, 232, a methane exhaust interface, 233, an overflow methane exhaust interface, 24, liquid filling, 25, a gas pressure sensor, 26, a liquid level indicator, 27, a sewage outlet, 3, a secondary pressure reducing device, 31, an air inlet pipe, 32, a rupture disc, 33, a flange interface, 34, a protective cover, 35, a second overflow methane discharge outlet, 4, an exhaust device, 41, a methane inlet interface, 42, an overflow methane inlet interface, 43, a methane discharge outlet, 44, a first overflow methane discharge outlet and 5, an anaerobic fermentation reactor.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. 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.
The invention is described in further detail below with reference to the accompanying drawings:
as shown in fig. 1 to 3, the biogas pressure reducing device for an anaerobic fermentation reactor according to the present invention comprises: the device comprises a base 1, a primary pressure reducing device 2, a secondary pressure reducing device 3 and an exhaust device 4; the base 1 is hermetically connected with a biogas hole of the anaerobic fermentation reactor 5 through a flange; the primary pressure reducing means 2 comprises a packing chamber 21, the packing chamber 21 is divided into a first packing chamber 211 and a second packing chamber 212 by the partition 22, a communicating hole 221 is formed in the lower portion of the partition 22, so that the first packing chamber 211 is communicated with the bottom of the second packing chamber 212 to form a communicating device, the bottom of the air inlet flow guide pipe 23 penetrates through the first packing chamber 211 from bottom to top, a first air inlet 11 is formed in the position, corresponding to the air inlet flow guide pipe 23, of the base 1, the bottom of the air inlet flow guide pipe 23 is communicated with a biogas hole of the anaerobic fermentation reactor 5, a biogas exhaust interface 232 is formed at the top of the air inlet flow guide pipe 23, an overflow biogas exhaust interface 233 is formed at the top of the second packing chamber 212, liquid packing 24 not lower than the communicating hole 221 is filled in the packing chamber 21, and an opening 231 is formed in the portion, located in the first packing chamber 211, of the; the exhaust device 4 is provided with two air inlets and two air outlets, the two air inlets are a biogas air inlet interface 41 and an overflow biogas air inlet interface 42 respectively and are correspondingly communicated with a biogas exhaust interface 232 and an overflow biogas air outlet interface 233 respectively, the two air outlets are a biogas exhaust port 43 and a first overflow biogas discharge port 44 respectively, the biogas exhaust port 43 is communicated with the biogas air inlet interface 41 through a pipeline, and the first overflow biogas discharge port 44 is communicated with the biogas air inlet interface 41 and the overflow biogas air inlet interface 42 through a pipeline respectively; the secondary pressure reducing device 3 comprises an air inlet pipe 31 and a rupture disk 32, the lower end of the air inlet pipe 31 is hermetically fixed on the base 1, the upper end of the air inlet pipe 31 is fixed with the rupture disk 32 through a flange connector 33, and the base 1 is provided with a second air inlet 12 corresponding to the position of the rupture disk 32 so that the pressure in a methane hole of the anaerobic fermentation reactor 5 directly acts on the rupture disk 32; the pressure limit of the secondary pressure relief device 3 is greater than the pressure limit of the primary pressure relief device 2.
As shown in fig. 4 to 6, in this embodiment, it is preferable that the shape of the horizontal cross section of the packing chamber 21 is trapezoidal and squareIn combination, the trapezoid part is a first filling chamber 211, the square part is a second filling chamber 212, the trapezoid part and the square part are separated by a partition plate 22, and a communication hole 221 in the partition plate 22 enables the first filling chamber 211 and the second filling chamber 212 to form a communicator. An air inlet guide pipe 23 is arranged in the trapezoidal packing chamber, the air inlet guide pipe 23 penetrates through the trapezoidal packing chamber from bottom to top, and an opening 231 in the upper part of the air inlet guide pipe 23 is communicated with the trapezoidal packing chamber. Biogas with certain pressure enters a biogas guide pipe of the primary pressure reducing device 2 from the anaerobic fermentation reactor 5 through the first air inlet 11, and the biogas enters the exhaust device 4 through the biogas guide pipe (trapezoid packing chamber). Due to the opening 231 on the methane draft tube, the methane draft tube is communicated with the trapezoidal packing chamber, and the liquid packing 24 with a certain volume is kept in the trapezoidal packing chamber. Preferably, when biogas enters the intake flow guide pipe 23 from the first air inlet 11, the biogas pressure acts on the upper surface of the liquid packing 24 in the first packing chamber 211 through the opening 231 on the intake flow guide pipe 23. Along with the rise of the biogas pressure, the liquid level of the trapezoidal packing chamber is gradually reduced under the action of the pressure, and the liquid level of the square packing chamber on the other side of the communicating vessel (consisting of the trapezoidal packing chamber and the square packing chamber) is gradually increased. When a certain pressure value is reached, the liquid level of the trapezoid filling chamber is lowered to the height of the communication hole 221 on the partition plate 22, so that the biogas pressure of the liquid filling 24 in the first filling chamber 211, which is lowered to the height of the communication hole 221, is the pressure limit value P of the primary pressure reducing device 21。
When the methane pressure value P is0≤P1During the process, the biogas is discharged from the biogas interface through the gas inlet guide pipe 23 (trapezoidal packing chamber), and the flow direction of the biogas is as follows: the first air inlet 11 → the air inlet flow guide pipe 23 → the methane gas outlet interface 232.
When the methane pressure value P is0＞P1During the process, the flow direction of the biogas is divided into two parts:
(1) the biogas is discharged from the biogas exhaust interface 232 through the intake draft tube 23 (trapezoidal packing chamber), and the biogas flows to: the first air inlet 11 → the air inlet flow guide pipe 23 → the methane gas outlet interface 232.
(2) The marsh gas is discharged from the overflow marsh gas exhaust interface 233 through the air inlet flow guide pipe 23 (trapezoid packing chamber) and the square packing chamber step by step, and the marsh gas flows to: first air inlet 11 → intake flow guide 23 →
According to the above embodiment, the primary pressure reducing device 2 reduces the pressure of the biogas in the anaerobic fermentation reactor 5 by discharging the biogas to the outside of the anaerobic fermentation reactor 5, thereby protecting the anaerobic fermentation reactor 5.
In the above embodiment, preferably, a gas pressure sensor 25 is disposed at the top of the first packing chamber 211 for detecting the biogas pressure in the first packing chamber 211. The upper part of the side wall of the second filling chamber 212 is provided with a liquid level indicator 26 for indicating the liquid level height of the liquid filling 24 in the second filling chamber 212, and the lower part of the side wall of the second filling chamber 212 is provided with a sewage draining outlet 27.
As shown in fig. 7, in the above embodiment, preferably, the base 1 is made of a ribbed steel plate, the periphery of the steel plate is perforated and is connected with the biogas holes of the anaerobic fermentation reactor 5 through flanges, a sealing ring is arranged between the base 1 and the biogas holes of the anaerobic fermentation reactor 5 and is fastened by bolts, so that the connection between the whole pressure reduction device and the anaerobic fermentation reactor 5 is realized, and the sealing ring is added to ensure that the connection is sealed and has no leakage.
In the above embodiment, preferably, the stuffing chamber 21 of the primary pressure reducer 2 and the air inlet pipe 31 of the secondary pressure reducer 3 are welded and fixed to the upper surface of the base 1. The base 1 is used as a supporting component of the methane pressure reducing device and supports a primary pressure reducing device 2, a secondary pressure reducing device 3 and an exhaust device 4 on the upper part of the base.
In the above embodiment, preferably, the biogas in the anaerobic fermentation reactor 5 directly acts on the rupture disk 32 of the secondary pressure reduction device 3 through the second air inlet 12, and when the biogas pressure in the anaerobic fermentation reactor 5 rises rapidly or the pressure continues to rise after the primary pressure reduction device 2 is started, a certain pressure value P is reached2When is, i.e. P0＞P2＞P1The rupture disk 32 is ruptured, and overflowed biogas is discharged out of the anaerobic fermentation reactor 5 through a second overflowed biogas discharge port, so that the biogas pressure P of the rupture disk 32 is ruptured2I.e. the pressure limit of the secondary pressure reducing means 3.
In the above embodiment, it is preferable that the secondary pressure reducing device 3 further includes a protective cover 34, the protective cover 34 is disposed over the rupture disk 32 to prevent the rupture disk 32 from being interfered by the outside, and the protective cover 34 is not used for sealing. The protective cover 34 is fixed on the flange interface 33, and when the rupture disk 32 is ruptured, the protective cover 34 is a second overflow methane discharge port.
In the above embodiment, preferably, the biogas exhaust port 43 is communicated with a rear biogas utilization device for resource utilization, the first overflow biogas discharge port 44 is communicated with the atmosphere, and biogas is guided to be discharged to high altitude organic tissues through the overflow biogas discharge port.
Specifically, the exhaust device 4 functions as: biogas guiding and discharging, biogas emptying and overflowing biogas discharging.
(1) Biogas guiding and exhausting: the biogas exhaust port 43 is connected with a biogas utilization pipeline, and biogas is guided and exhausted to a rear-end biogas utilization facility for resource utilization; the flow direction of the biogas is as follows: the first air inlet 11 → the primary pressure reducing device 2 → the air discharging device 4 → the methane air outlet 43 → the methane pipeline; at P0≤P1Or P is0＞P1Or P is0＞P2Under three working conditions, the methane can flow along the flow direction.
(2) And (3) methane evacuation: when the biogas utilization pipeline or a biogas facility at the rear end of the pipeline breaks down, the biogas is discharged outside the anaerobic fermentation reactor 5 and is organically discharged through the exhaust device 4; the flow direction of the biogas is as follows: the first air inlet 11 → the primary pressure reducing device 2 → the methane air inlet interface 41 → the first overflow methane discharge port 44.
(3) Discharging overflowing methane: when P is present0＞P1Or P0＞P2When the biogas is discharged, the primary pressure reducing device 2 works, and the overflowed biogas is discharged in an organized manner through the exhaust device 4; the flow direction of the biogas is as follows: the first air inlet 11 → the primary pressure reducing device 2 → the air discharging device 4 → the first overflow biogas discharge port 44.
According to the biogas pressure reduction device for the anaerobic fermentation reactor provided by the embodiment, the biogas pressure reduction device provides two-stage pressure reduction functions:
1. when the slowly-rising biogas pressure exceeds the pressure limit value of the primary pressure reducing device 2, the primary pressure reducing device 2 rapidly reacts, biogas overflows through the primary pressure reducing device 2, the pressure is released, and the anaerobic fermentation reactor 5 is protected to stably operate within a limited pressure range;
2. for the rapidly increased methane pressure, the pressure cannot be prevented from being continuously increased after the first-stage pressure reducing device 2 is opened, and after the pressure reaches the pressure limit value of the second-stage pressure reducing device 3, the second-stage pressure reducing device 3 is opened to rapidly release the pressure, so that the safety of the anaerobic fermentation reactor 5 is protected.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. A biogas pressure reduction device for an anaerobic fermentation reactor, comprising: the device comprises a base, a primary pressure reducing device, a secondary pressure reducing device and an exhaust device;
the base is hermetically connected with a biogas hole of the anaerobic fermentation reactor through a flange;
the first-stage pressure reducing device comprises a packing chamber, a partition plate and an air inlet flow guide pipe, the edge of the bottom of the packing chamber is hermetically fixed on the base, the filling chamber is divided into a first filling chamber and a second filling chamber by the clapboard, the lower part of the clapboard is provided with a communication hole so that the first filling chamber is communicated with the bottom of the second filling chamber to form a communicating vessel, the bottom of the air inlet guide pipe penetrates through the first packing chamber from bottom to top, the base is provided with a first air inlet corresponding to the air inlet guide pipe, so that the bottom of the air inlet guide pipe is communicated with a biogas hole of the anaerobic fermentation reactor, the top of the air inlet guide pipe forms a methane exhaust interface, the top of the second packing chamber is provided with an overflow methane exhaust interface, liquid filler which is not lower than the communicating hole is filled in the filling chamber, and an opening is formed in the part, located in the first filling chamber, of the air inlet flow guide pipe;
the exhaust device is provided with two air inlets and two air outlets, the two air inlets are respectively a methane air inlet interface and an overflow methane air inlet interface and are respectively correspondingly communicated with the methane exhaust interface and the overflow methane exhaust interface, the two air outlets are respectively a methane exhaust port and a first overflow methane exhaust port, the methane exhaust port is communicated with the methane air inlet interface through a pipeline, and the first overflow methane exhaust port is respectively communicated with the methane air inlet interface and the overflow methane air inlet interface through a pipeline;
the second-stage pressure reducing device comprises an air inlet pipe and a rupture disk, the lower end of the air inlet pipe is hermetically fixed on the base, the upper end of the air inlet pipe is fixedly provided with the rupture disk through a flange interface, and the base is provided with a second air inlet corresponding to the position of the rupture disk, so that the pressure in a methane hole of the anaerobic fermentation reactor directly acts on the rupture disk;
the pressure limit of the secondary pressure relief device is greater than the pressure limit of the primary pressure relief device.
2. The biogas pressure reducing device for the anaerobic fermentation reactor, as claimed in claim 1, wherein when biogas enters the gas inlet flow guide pipe from the first gas inlet, biogas pressure acts on the upper surface of the liquid filler in the first filler chamber through the opening of the gas inlet flow guide pipe, so that the biogas pressure of the liquid filler in the first filler chamber is reduced to the height of the communication hole, which is the pressure limit of the primary pressure reducing device.
3. The biogas pressure reducing device for the anaerobic fermentation reactor as claimed in claim 1 or 2, wherein a gas pressure sensor is arranged at the top of the first packing chamber, a liquid level indicator is arranged at the upper part of the side wall of the second packing chamber, and a sewage draining outlet is arranged at the lower part of the side wall of the second packing chamber.
4. The biogas pressure reducing device for the anaerobic fermentation reactor as claimed in claim 1, wherein the base is formed by processing a ribbed steel plate, and a sealing ring is arranged between the base and the biogas hole of the anaerobic fermentation reactor and is fastened by bolt connection.
5. The biogas pressure reducing device for the anaerobic fermentation reactor as claimed in claim 1, wherein the stuffing chamber of the primary pressure reducing device and the air inlet pipe of the secondary pressure reducing device are welded and fixed on the upper surface of the base.
6. The biogas pressure reducing device for the anaerobic fermentation reactor as claimed in claim 1, wherein the secondary pressure reducing device further comprises a protective cover, the protective cover is covered above the rupture disk, the protective cover is fixed on the flange joint, and the protective cover is a second overflow biogas discharge port when the rupture disk is ruptured.
7. The biogas pressure reduction device for the anaerobic fermentation reactor according to claim 1 or 6, wherein the biogas pressure at which the rupture disk is ruptured is the pressure limit value of the secondary pressure reduction device.
8. The biogas pressure reducing apparatus for the anaerobic fermentation reactor as claimed in claim 1, wherein the biogas exhaust port is communicated with a rear biogas utilization device, and the first overflow biogas discharge port is communicated with the atmosphere.
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| CN202020344388.8U CN212128146U (en) | 2020-03-18 | 2020-03-18 | Methane pressure reducing device for anaerobic fermentation reactor |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111218388A (en) * | 2020-03-18 | 2020-06-02 | 北京高能时代环境技术股份有限公司 | Methane pressure reducing device for anaerobic fermentation reactor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111218388A (en) * | 2020-03-18 | 2020-06-02 | 北京高能时代环境技术股份有限公司 | Methane pressure reducing device for anaerobic fermentation reactor |
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