CN213506967U - Integrated controllable positive and negative pressure protector - Google Patents
Integrated controllable positive and negative pressure protector Download PDFInfo
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- CN213506967U CN213506967U CN202021583985.2U CN202021583985U CN213506967U CN 213506967 U CN213506967 U CN 213506967U CN 202021583985 U CN202021583985 U CN 202021583985U CN 213506967 U CN213506967 U CN 213506967U
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Abstract
An integrated controllable positive and negative voltage protector belongs to the field of protectors. Comprises an exhaust port (1), a heat preservation layer (2), a fermentation tank connecting port (3), an inner cavity (4), a first outer cavity (5), an antifreeze solution (6), a second outer cavity (7), a hydraulic cylinder (8), a connecting rod (9), a movable cover plate (10), a liquid level meter connecting pipe (11) and an air inlet (12); can maintain fermentation cylinder internal pressure and atmospheric pressure balanced, when atmospheric pressure was too big, the air increased jar internal pressure through positive negative pressure protector entering fermentation cylinder, until inside and outside pressure balance. When the internal pressure is overlarge, the biogas is discharged through the positive and negative pressure protector, the pressure in the tank is reduced until the internal pressure and the external pressure are balanced.
Description
Technical Field
The utility model relates to a positive and negative pressure protection device of an anaerobic bioreactor in biogas fermentation engineering, in particular to a positive and negative pressure protector, belonging to the field of protectors.
Background
With the gradual maturity and large-scale application of the anaerobic fermentation production technology, the problem of environmental pollution caused by treatment of crop straws and livestock manure is solved to a great extent. The waste can generate methane which can be used as energy after anaerobic treatment, thereby realizing resource recycling. The anaerobic fermentation technology can realize the reduction, harmlessness and reclamation of pollutants, and has important significance for the development of society and economy. The anaerobic fermentation tank is a key device of biogas engineering, the pressure in the tank can be changed by the generation of biogas and the quality change of digestive juice in the tank, the pressure of the tank body has upper and lower bearing limits, and if the internal pressure of the tank body exceeds the upper limit, serious safety accidents of tank body burst are likely to occur. For example, when the tank is fed and stirred, the gas production is suddenly increased, and a large amount of methane is rapidly enriched in the tank, so that very high pressure is generated. If the pressure of the tank body can not be released in time, the tank body is burst. If the pressure in the tank is too low, the external atmospheric pressure will be greater than the internal pressure of the tank, and the tank will be subjected to a compressive force from the atmospheric pressure. If the pressure difference between the inside and the outside reaches a certain value, the tank body is flattened by the atmospheric pressure.
SUMMERY OF THE UTILITY MODEL
For solving the inside and outside pressure balance problem of fermentation cylinder, the utility model provides a positive negative pressure protection device can be when the fermentation cylinder internal pressure takes place undulant, through exhausting or introducing external atmosphere, internal and external pressure in the balancing tank.
Positive negative pressure protector includes: the device comprises an exhaust port (1), a heat preservation layer (2), a fermentation tank connecting port (3), an inner cavity (4), a first outer cavity (5), antifreeze liquid (6), a second outer cavity (7), a hydraulic cylinder (8), a connecting rod (9), a movable cover plate (10), a liquid level meter connecting pipe (11) and an air inlet (12);
a relatively small second cylindrical cavity (17) which is coaxially nested is arranged at the upper part in the first cylindrical cavity (16), an annular gap between the lower end of the second cylindrical cavity (17) and the inner wall of the first cylindrical cavity (16) is sealed and fixed by a first sealing plate (18), a first antifreezing solution (6) is arranged between the outer side of the second cylindrical cavity (17) and the inner side of the first cylindrical cavity (16), and a liquid level meter connecting pipe (11) is communicated with the first antifreezing solution (6) from the first sealing plate (18); an inverted U-shaped fixing structure (19) is arranged at the upper end opening of the second cylindrical cavity (17), gaps are reserved between the inner side surface of the inverted U-shaped fixing structure (19) and the end part and the side surface of the upper end opening of the second cylindrical cavity (17), the lower end opening of the inverted U-shaped fixing structure (19) extends into the first antifreezing solution (6), and the inside and outside air of the inverted U-shaped fixing structure (19) is not communicated; the part of the corresponding first cylindrical cavity (16) below the first sealing plate (18) is marked as an inner cavity (4), and the side surface of the inner cavity (4) is provided with a fermentation tank connecting port (3); a third cylindrical cavity (20) is coaxially nested at the inner lower part of the first cylindrical cavity (16), an annular gap between the lower port of the third cylindrical cavity (20) and the lower port of the first cylindrical cavity (16) is sealed and fixed by a second sealing plate (21), and second antifreezing fluid (22) is filled in annular gaps between the third cylindrical cavity (20) and the first cylindrical cavity (16) and above the second sealing plate (21); a movable cover plate (10) is arranged at the upper end opening of the third cylindrical cavity (20), a sealing ring which is bent downwards is arranged on the periphery of the movable cover plate (10), the sealing ring extends into the second antifreezing solution (22), and a gap is formed between the sealing ring and the outer side surface of the third cylindrical cavity (20); the lower surface of the movable cover plate (10) is fixedly connected with the hydraulic cylinder (8) through a connecting rod (9), and the connecting rod (9) axially and parallelly penetrates through a cavity of the third cylindrical cavity (20);
the upper port of the first cylindrical cavity (16) is sealed and only provided with an exhaust port (1); an insulating layer (2) is arranged outside the first cylindrical cavity (16);
the second antifreezing solution (22) is connected with the outside through a hose, and is used for supplementing the second antifreezing solution (22) when the second antifreezing solution (22) is insufficient.
A space between the first cylindrical cavity (16) and the inverted U-shaped fixed structure (19) and above the first antifreezing solution (6) is a first outer cavity (5), namely a positive pressure protection area (13); a negative pressure protection area (14) is arranged between the first cylindrical cavity (16) and the sealing ring which is bent downwards on the periphery of the movable cover plate (10) and above the second antifreezing solution (22);
the cavity of the third cylindrical cavity (20) is a second outer cavity (7) and is also used as an air inlet (12);
furthermore, the first cylindrical cavity (16) is divided into two independent cylindrical cavities between the fermentation tank connecting port (3) and the movable cover plate (10), and the two independent cylindrical cavities are connected by a connecting flange (15).
The diameter of the third cylindrical cavity (20) is larger than the diameter of the second cylindrical cavity (17).
The positive and negative pressure protector is communicated with the fermentation tank through a fermentation tank connecting port in a gas phase manner, methane enters an inner cavity (4) of the positive and negative pressure protector, and the pressure on the inner cavity and a first antifreezing liquid level in the U-shaped fixed structure (19) is equal to the pressure in the fermentation tank; the pressure on the contact surface of the antifreeze in the positive pressure protection area is equal to the atmospheric pressure of the environment.
When the pressure in the inner cavity (4) is higher than the atmospheric pressure, the first antifreezing fluid level between the inverted U-shaped fixed structure (19) and the second cylindrical cavity (17) continuously drops, the first antifreezing fluid level in the positive pressure protection area (13) continuously rises until the first antifreezing fluid completely enters the positive pressure protection area (13) or the liquid level of the first antifreezing fluid level in the positive pressure protection area (13) is flush with the lower end part of the inverted U-shaped fixed structure (19), and high-pressure gas in the inner cavity (4) bubbles out from the first antifreezing fluid; when the air pressure is balanced, the first antifreezing solution is restored to the original position;
when the pressure in the inner cavity (4) is smaller than the atmospheric pressure, the liquid level of the second antifreezing solution (22) between the third cylindrical cavity (20) and the sealing rings which are bent downwards on the periphery of the movable cover plate (10) continuously descends, the liquid level of the second antifreezing solution (22) in the negative pressure protection area (14) continuously ascends until the second antifreezing solution (22) completely enters the negative pressure protection area (14) or the liquid level of the second antifreezing solution (22) between the third cylindrical cavity (20) and the sealing rings which are bent downwards on the periphery of the movable cover plate (10) is flush with the lower ends of the sealing rings which are bent downwards on the periphery of the movable cover plate (10), and atmospheric gas continuously bubbles from the second antifreezing solution (22) and enters the negative pressure protection area (14); when the air pressure is balanced, the second antifreezing solution is restored to the original position; if the pressure in the inner cavity (4) is very small (pressure data can be read from the pressure gauge according to preset pressure), the hydraulic cylinder (8) can be started manually to drive the movable cover plate (10) to move upwards, so that the sealing ring which is bent downwards around the movable cover plate (10) is separated from the second antifreezing solution (22), and the external atmosphere directly enters the inner cavity (4) to balance the pressure quickly.
The utility model is characterized in that:
1. the positive and negative pressure protector can maintain the balance between the internal pressure of the fermentation tank and the atmospheric pressure, and when the atmospheric pressure is too large, air enters the fermentation tank through the positive and negative pressure protector, so that the internal pressure of the tank is increased until the internal pressure and the external pressure are balanced. When the internal pressure is overlarge, the biogas is discharged through the positive and negative pressure protector, the pressure in the tank is reduced until the internal pressure and the external pressure are balanced.
2. The utility model provides a positive negative pressure protector has integrateed malleation protect function and negative pressure protect function simultaneously. The floor area and the installation difficulty of the equipment are reduced.
3. The utility model provides a positive negative pressure protector provides a manual intervention selection, when fermentation cylinder internal pressure is in too high or cross the low state for a long time, removable cover can be opened when the unable work needs that satisfy of conventional pressure balance mode, makes jar interior and atmosphere direct intercommunication to the internal and external pressure of rapid balance.
Drawings
FIG. 1 is a schematic view of the positive/negative pressure protector provided by the present invention
The anti-freezing device comprises an exhaust port (1), a heat preservation layer (2), a fermentation tank connecting port (3), an inner cavity (4), a first outer cavity (5), anti-freezing solution (6), a second outer cavity (7), a hydraulic cylinder (8), a connecting rod (9), a movable cover plate (10), a liquid level meter connecting pipe (11), an air inlet (12), a positive pressure protection area (13), a negative pressure protection area (14), a connecting flange (15), a first cylindrical cavity (16), a second cylindrical cavity (17), a first sealing plate (18), an inverted U-shaped fixing structure (19), a third cylindrical cavity (20), a second sealing plate (21) and second anti-freezing solution (22).
Detailed Description
In order to make the technical solution of the present invention better understood by those skilled in the art, the following description is made with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1: the positive and negative pressure protector comprises an exhaust port (1), a heat preservation layer (2), a fermentation tank connecting port (3), an inner cavity (4), a first outer cavity (5), antifreeze (6), a second outer cavity (7), a hydraulic cylinder (8), a connecting rod (9), a movable cover plate (10), a liquid level meter connecting pipe (11), an air inlet (12), a positive pressure protection area (13), a negative pressure protection area (14), a connecting flange (15), a first cylindrical cavity (16), a second cylindrical cavity (17), a first sealing plate (18), an inverted U-shaped fixed structure (19), a third cylindrical cavity (20), a second sealing plate (21) and second antifreeze (22).
The part filled with gas in the tank is called an inner cavity, and the part filled with air is called an outer cavity. The cross section area and the submerging height of the inner cavity and the outer cavity in the anti-freezing liquid are determined according to the protection pressure range. The positive and negative pressure protector is cylindrical as a whole, and the inner cavity and the outer cavity are symmetrical about the axis.
The anti-freezing liquid is connected with a liquid level meter outside the protector through a connecting hose arranged at the bottom, the height of the liquid level meter can reflect the pressure inside the methane tank, and when the anti-freezing liquid is insufficient, the anti-freezing liquid can be supplemented into the positive and negative pressure protector through the connecting hose.
The fermentation tank gas phase is communicated with the positive and negative pressure protector through a fermentation tank connecting port 3. When the pressure in the tank is positive pressure, the liquid level in the inner cavity of the positive pressure protection area is reduced until the liquid level in the inner cavity is reduced to the edge, and the gas in the tank escapes to the outer cavity through the communicating pipe and is discharged to the atmosphere through the exhaust port 1, so that the purpose of pressure relief is achieved. Along with the continuous reduction of the pressure in the tank, the liquid level of the inner cavity gradually rises until the liquid level is higher than the edge, and the liquid seal structure is restored again. When the pressure in the tank is negative pressure, the liquid level of an outer cavity (between the third cylindrical cavity and the sealing ring which is bent downwards on the periphery of the movable cover plate) of the negative pressure protection area is lowered, the liquid level of an inner cavity (the negative pressure protection area) is raised, and when the liquid level in the outer cavity is lowered to the edge, the external atmosphere enters the inner cavity through the second antifreezing solution and finally enters the fermentation tank, so that the purpose of pressurization is achieved. Along with the continuous rising of the pressure in the tank, the liquid level of the outer cavity gradually rises until the liquid level is higher than the edge, and the liquid seal structure is restored again.
When the internal and external pressure fluctuates greatly or the positive and negative pressure protector fails, the internal and external pressure in the tank is in an unbalanced state for a long time, the movable cover plate can be pushed upwards under the action of the air cylinder, the bottom edge of the movable cover plate is separated from the antifreeze solution, and therefore the fermentation tank is directly communicated with the external atmosphere, and the purpose of rapid pressure balance is achieved.
Claims (5)
1. A positive and negative voltage protector, comprising: the device comprises an exhaust port (1), a heat preservation layer (2), a fermentation tank connecting port (3), an inner cavity (4), a first outer cavity (5), a first antifreezing solution (6), a second outer cavity (7), a hydraulic cylinder (8), a connecting rod (9), a movable cover plate (10), a liquid level meter connecting pipe (11) and an air inlet (12);
a relatively small second cylindrical cavity (17) which is coaxially nested is arranged at the upper part in the first cylindrical cavity (16), an annular gap between the lower end of the second cylindrical cavity (17) and the inner wall of the first cylindrical cavity (16) is sealed and fixed by a first sealing plate (18), a first antifreezing solution (6) is arranged between the outer side of the second cylindrical cavity (17) and the inner side of the first cylindrical cavity (16), and a liquid level meter connecting pipe (11) is communicated with the first antifreezing solution (6) from the first sealing plate (18); an inverted U-shaped fixing structure (19) is arranged at the upper end opening of the second cylindrical cavity (17), gaps are reserved between the inner side surface of the inverted U-shaped fixing structure (19) and the end part and the side surface of the upper end opening of the second cylindrical cavity (17), the lower end opening of the inverted U-shaped fixing structure (19) extends into the first antifreezing solution (6), and the inside and outside air of the inverted U-shaped fixing structure (19) is not communicated; the part of the corresponding first cylindrical cavity (16) below the first sealing plate (18) is marked as an inner cavity (4), and the side surface of the inner cavity (4) is provided with a fermentation tank connecting port (3); a third cylindrical cavity (20) is coaxially nested at the inner lower part of the first cylindrical cavity (16), an annular gap between the lower port of the third cylindrical cavity (20) and the lower port of the first cylindrical cavity (16) is sealed and fixed by a second sealing plate (21), and second antifreezing fluid (22) is filled in annular gaps between the third cylindrical cavity (20) and the first cylindrical cavity (16) and above the second sealing plate (21); a movable cover plate (10) is arranged at the upper end opening of the third cylindrical cavity (20), a sealing ring which is bent downwards is arranged on the periphery of the movable cover plate (10), the sealing ring extends into the second antifreezing solution (22), and a gap is formed between the sealing ring and the outer side surface of the third cylindrical cavity (20); the lower surface of the movable cover plate (10) is fixedly connected with the hydraulic cylinder (8) through a connecting rod (9), and the connecting rod (9) axially and parallelly penetrates through a cavity of the third cylindrical cavity (20);
the upper port of the first cylindrical cavity (16) is sealed and only provided with an exhaust port (1); an insulating layer (2) is arranged outside the first cylindrical cavity (16);
the second antifreezing solution (22) is connected with the outside through a hose and is used for supplementing the second antifreezing solution (22) when the second antifreezing solution (22) is insufficient;
a space between the first cylindrical cavity (16) and the inverted U-shaped fixed structure (19) and above the first antifreezing solution (6) is a first outer cavity (5), namely a positive pressure protection area (13); a negative pressure protection area (14) is arranged between the first cylindrical cavity (16) and the sealing ring which is bent downwards on the periphery of the movable cover plate (10) and above the second antifreezing solution (22);
the cavity of the third cylindrical cavity (20) is a second outer cavity (7) and also serves as an air inlet (12).
2. A positive and negative pressure protector according to claim 1, characterized in that the first cylindrical cavity (16) is divided into two separate and independent cylindrical cavities between the fermenter connecting port (3) and the removable lid (10), and the two independent cylindrical cavities are connected by a connecting flange (15).
3. A positive and negative pressure protector according to claim 1, wherein the diameter of the third cylindrical cavity (20) is greater than the diameter of the second cylindrical cavity (17).
4. The positive-negative pressure protector according to claim 1, characterized in that the positive-negative pressure protector is in gas phase communication with the fermentation tank through the fermentation tank connection port, biogas enters the inner cavity (4) of the positive-negative pressure protector, and the pressure on the inner cavity and the first antifreeze liquid level in the U-shaped fixed structure (19) is equal to the pressure in the fermentation tank; the pressure on the contact surface of the antifreeze in the positive pressure protection area is equal to the atmospheric pressure of the environment.
5. A positive and negative pressure protector according to claim 1, wherein when the pressure in the internal chamber (4) is greater than atmospheric pressure, the first antifreeze liquid level between the inverted U-shaped fixed structure (19) and the second cylindrical cavity (17) is continuously lowered, the first antifreeze liquid level in the positive pressure protection zone (13) is continuously raised until the first antifreeze liquid completely enters the positive pressure protection zone (13) or the first antifreeze liquid level in the positive pressure protection zone (13) is flush with the lower end of the inverted U-shaped fixed structure (19), and the high pressure gas in the internal chamber (4) bubbles out of the first antifreeze liquid; when the air pressure is balanced, the first antifreezing solution is restored to the original position;
when the pressure in the inner cavity (4) is smaller than the atmospheric pressure, the liquid level of the second antifreezing solution (22) between the third cylindrical cavity (20) and the sealing rings which are bent downwards on the periphery of the movable cover plate (10) continuously descends, the liquid level of the second antifreezing solution (22) in the negative pressure protection area (14) continuously ascends until the second antifreezing solution (22) completely enters the negative pressure protection area (14) or the liquid level of the second antifreezing solution (22) between the third cylindrical cavity (20) and the sealing rings which are bent downwards on the periphery of the movable cover plate (10) is flush with the lower ends of the sealing rings which are bent downwards on the periphery of the movable cover plate (10), and atmospheric gas continuously bubbles from the second antifreezing solution (22) and enters the negative pressure protection area (14); when the air pressure is balanced, the second antifreezing solution is restored to the original position; when the inner cavity (4) is lower than the atmospheric pressure, the hydraulic cylinder (8) is manually started to drive the movable cover plate (10) to move upwards, so that the sealing rings which are bent downwards around the movable cover plate (10) are separated from the second antifreezing solution (22), the external atmosphere directly enters the inner cavity (4), and the pressure is rapidly balanced.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021583985.2U CN213506967U (en) | 2020-08-03 | 2020-08-03 | Integrated controllable positive and negative pressure protector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021583985.2U CN213506967U (en) | 2020-08-03 | 2020-08-03 | Integrated controllable positive and negative pressure protector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213506967U true CN213506967U (en) | 2021-06-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021583985.2U Active CN213506967U (en) | 2020-08-03 | 2020-08-03 | Integrated controllable positive and negative pressure protector |
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| Country | Link |
|---|---|
| CN (1) | CN213506967U (en) |
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2020
- 2020-08-03 CN CN202021583985.2U patent/CN213506967U/en active Active
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