CN219260001U

CN219260001U - Anaerobic fermentation reactor with overpressure protection

Info

Publication number: CN219260001U
Application number: CN202223520123.7U
Authority: CN
Inventors: 李长沙; 周堃; 郁岚; 刘金课
Original assignee: Zhongbang Carbon Energy Jiangsu Technology Co ltd
Current assignee: Zhongbang Carbon Energy Jiangsu Technology Co ltd
Priority date: 2022-12-28
Filing date: 2022-12-28
Publication date: 2023-06-27
Anticipated expiration: 2032-12-28

Abstract

The utility model relates to the technical field of anaerobic fermentation reactors, in particular to an anaerobic fermentation reactor with overpressure protection, which comprises a tank body, wherein the tank body comprises a stirring device and an overpressure protection device which are arranged on the tank body, the overpressure protection device comprises a connecting pipe which is hermetically connected with the tank body, the connecting pipe is provided with a bursting piece with the highest bearing pressure smaller than that of the tank body, the connecting pipe is connected with a conduit for releasing gas or liquid, and the conduit is connected with a gas collecting device.

Description

Anaerobic fermentation reactor with overpressure protection

Technical Field

The utility model relates to the technical field of anaerobic fermentation reactors, in particular to an anaerobic fermentation reactor with overpressure protection.

Background

The whole traditional stirring type fermentation device is composed of stainless steel, and air is introduced into a fermentation tank during operation, so that fermentation liquor is uniformly stirred and reacts with oxygen in the air to generate a target product. The air is usually low-pressure air with the pressure slightly higher than the standard atmospheric pressure, and the problem that the pressure continuously passes through the overload to cause explosion of the fermentation tank is generally avoided. In recent years, some new reaction systems have been developed, for example, using synthesis gas formed by mixing carbon monoxide, carbon dioxide, hydrogen and inert gases, and fermenting the synthesis gas in the presence of anaerobic bacteria to produce target products such as ethanol. The system needs to be filled with synthetic gas with certain pressure, and the pressure is usually higher, so that the synthetic gas system with the high pressure needs to be protected with certain pressure in consideration of the inflammable, explosive and toxic characteristics of the synthetic gas, otherwise accidents or unnecessary waste are easily caused.

Chinese patent publication No. CN111218388A discloses a biogas depressurizing device for an anaerobic fermentation reactor, which protects the safety of the anaerobic fermentation reactor, and has the defect that after rupture of a rupture disc of a secondary depressurizing device when the biogas is over-pressurized, the biogas is discharged into the surrounding air, and the biogas in the discharged air is easy to harm staff near the reactor due to certain harm of the biogas to human body.

Disclosure of Invention

In order to solve the technical defects in the background art, the utility model aims to provide an anaerobic fermentation reactor with overpressure protection, which has the function of overpressure protection for the anaerobic fermentation reactor and can not cause toxic and harmful gas to harm surrounding staff.

The utility model adopts the following technical scheme:

the anaerobic fermentation reactor with the overpressure protection comprises a tank body, wherein a stirring device is arranged in the tank body, one side of the tank body is provided with the overpressure protection device, the overpressure protection device comprises a connecting pipe which is sealed with the tank body and is connected in a conducting manner, the connecting pipe is provided with a bursting piece with the highest bearing pressure smaller than that of the tank body, the connecting pipe is connected with a conduit for releasing gas or liquid, and the conduit is connected with a gas collecting device.

By adopting the scheme: when the air pressure in the tank body is too high and exceeds the bearing pressure of the bursting piece, the bursting piece bursts, gas flows into the gas collecting device through the guide pipe to realize the pressure relief function, the gas collecting device can conduct secondary treatment on leaked gas or transfer the leaked gas to other treatment units, the fact that the inside of the gas collecting device cannot be over-pressurized is guaranteed, and due to the fact that the leaked gas is collected by the gas collecting device and cannot be released into the atmosphere, staff around the tank body cannot be affected.

The connecting pipe is divided into a ventilation end and a liquid ventilation end, the ventilation end and the liquid ventilation end are both connected with the tank body, the bursting piece is detachably arranged between the ventilation end and the liquid ventilation end, and the guide pipe is provided with a closed door.

By adopting the scheme: one end of the connecting pipe is connected with the gas part in the tank body and used for exhausting gas, the other end of the connecting pipe is connected with the liquid part in the tank body and used for exhausting liquid, the bursting piece can be arranged in a detachable mode, when the bursting piece needs to be replaced, the airtight door is only required to be opened, and then the bursting piece is replaced, so that the novel tank is very convenient.

The guide pipe is connected with a liquid storage tank, a first liquid leakage valve is arranged between the guide pipe and the liquid storage tank, and a second liquid leakage valve is arranged at the liquid passing end.

By adopting the scheme: when the air pressure in the tank is suddenly increased so that the air collection device cannot be timely released, the first liquid discharge valve and the second liquid discharge valve are simultaneously opened, and liquid in the tank is transferred to the liquid storage tank through the guide pipe, so that unnecessary waste caused by damage of the tank body due to overpressure is prevented, and when the bursting piece bursts due to the fact that the air pressure is too high but the first liquid discharge valve is not opened, the first liquid discharge valve is closed, so that leaked air cannot enter the liquid storage tank.

The gas collecting device comprises a gas collecting tank and a gas guide pipe, one end of the gas guide pipe is connected with the guide pipe, and the other end of the gas guide pipe is connected with the gas collecting tank.

By adopting the scheme: the leaked gas flows through the gas duct into a gas collection tank which has a certain pressure-carrying capacity and can store or transfer the gas or secondary process gas to other process units.

Preferably, the stirring device comprises an axial flow stirrer, a radial flow stirrer and a stirring motor, wherein the axial flow stirrer and the radial flow stirrer are arranged on the main shaft, and the stirring motor is used for driving the axial flow stirrer and the radial flow stirrer to rotate.

By adopting the scheme: the axial flow stirrer makes the fluid flow direction parallel to the stirring shaft, the fluid is pushed by the blade to make the fluid flow downwards, and then turns upwards when encountering the bottom surface of the container to form an up-and-down circulation flow, the radial flow stirrer makes the fluid flow direction perpendicular to the stirring shaft and flows along the radial direction, and the fluid which encounters the wall surface of the container is divided into two flows which flow upwards and downwards respectively and then return to the blade end without passing through the blade to form an up-and-down circulation flow, and the axial flow stirrer and the radial flow stirrer are matched to make stirring more sufficient.

In summary, the beneficial effects of the utility model are as follows:

1. the gas collecting device is provided with an overpressure protection device, when the gas pressure in the tank body is overlarge, the bursting piece bursts, and gas flows to the gas collecting device through the guide pipe, so that the pressure relief function is realized.

2. When the air pressure in the tank body is suddenly increased, the first liquid discharge valve and the second liquid discharge valve are simultaneously opened, and liquid in the tank is transferred to the liquid storage tank through the guide pipe, so that unnecessary waste caused by damage to the tank body due to overpressure is prevented.

3. The burst piece can be detached and arranged, the guide pipe is provided with a closed door, and the burst piece can be replaced by opening the door, so that the device is very convenient.

4. The axial flow stirrer and the radial flow stirrer are arranged to be matched so as to ensure that stirring is more sufficient.

The foregoing description is only an overview of the technical solution of the present utility model, and may be implemented according to the content of the specification in order to make the technical means of the present utility model more clearly understood, and in order to make the above and other objects, features and advantages of the present utility model more clearly understood, the following specific preferred embodiment is given by way of the following detailed description in conjunction with the accompanying drawings.

Drawings

FIG. 1 is an overall schematic of an anaerobic fermentation reactor with overpressure protection according to the utility model;

FIG. 2 is an overall sectional view of an anaerobic fermentation reactor with overpressure protection according to the utility model.

Reference numerals in the drawings illustrate: 1. a tank body; 2. an air inlet hole; 3. a feed inlet; 4. a discharge port; 5. a stirring device; 6. a stirring motor; 7. a main shaft; 8. an axial flow stirrer; 9. a radial flow stirrer; 10 baffle plates; 11. an overvoltage protection device; 12. a connecting pipe; 13. a ventilation end; 14. a liquid passing end; 15. a second drain valve; 16. a bursting piece; 17. a conduit; 18. closing and opening a door; 19. a liquid outlet; 20. a gas collection device; 21. a gas collection tank; 22. an air duct; 23. a transfer outlet; 24. a liquid storage tank; 25. a first drain valve; 26 gas outlet.

Detailed Description

In order that the utility model may be more readily understood, a further description of the utility model will be rendered by reference to specific embodiments that are illustrated in the appended drawings.

It should be noted that, as used herein, the terms "center," "upper," "lower," "front," "rear," "left," "right," "inner," "outer," and the like indicate an orientation or a positional relationship based on that shown in the drawings, and are merely for convenience of description and to simplify the description, and do not indicate or imply that the apparatus or element in question must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the utility model. Unless otherwise indicated, the meaning of "a plurality" is two or more.

Unless specifically stated or limited otherwise, the terms "mounted," "connected," and "coupled" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art in a specific case.

As shown in fig. 1 to 2, an anaerobic fermentation reactor with overpressure protection comprises a stainless steel tank body 1, wherein an air inlet hole 2 is formed in the side surface of the tank body 1, synthesis gas is introduced into the tank body 1 from the air inlet hole 2, and a gas pressure sensor is arranged in the tank body 1 and used for monitoring the change of the gas pressure in the tank body 1 in the fermentation process; the upper portion of the tank body 1 is provided with a feed inlet 3, the bottom of the tank body 1 is provided with a discharge outlet 4, the main effect is feeding and discharging, the inside stirring device 5 that is provided with of the tank body 1, the stirring device 5 is including installing in the stirring motor 6 at the top of the tank body 1, the stirring motor 6 is connected with a main shaft 7 in a linkage manner, an axial flow stirrer 8 and a radial flow stirrer 9 are installed on the main shaft 7, the stirring motor 6 drives the main shaft 7 to rotate so as to drive the axial flow stirrer 8 and the radial flow stirrer 9 to rotate, the axial flow stirrer 8 and the radial flow stirrer 9 enable stirred liquid to generate axial flow and radial flow, a baffle 10 is arranged inside the tank body 1, and therefore the flowing direction of the liquid can be changed, and the concave vortex generated in the central part of the page is eliminated.

The tank body 1 is provided with an overpressure protection device 11, the overpressure protection device 11 comprises a connecting pipe 12 arranged on the side wall of the tank body 1, the connecting pipe 12 is divided into a ventilation end 13 and a liquid-passing end 14, the ventilation end 13 is connected with the upper part of the tank body 1, the liquid-passing end 14 is connected with the lower part of the tank body 1, the liquid-passing end 14 is provided with a second liquid-discharging valve 15, the connecting pipe 12 is provided with a bursting piece 16 made of PC material, the two ends of the bursting piece 16 are provided with threads, the bursting piece 16 is arranged between the ventilation end 13 and the liquid-passing end 14 through threads, a sealing ring can be arranged at the threaded connection position of the bursting piece 16 and the connecting pipe 12 to ensure the tightness of the tank body 1, the connecting pipe 12 is connected with a conduit 17 for releasing gas or liquid, the conduit 17 is arranged between the ventilation end 13 and the liquid-passing end 14 and surrounds the bursting piece 16, the conduit 17 is provided with a closed door 18, when the bursting piece 16 needs to be replaced, the closed door 18 is directly opened, the old bursting piece 16 is replaced and then a new bursting piece 16 is replaced, because the detachable design and replacement of the bursting piece 16 are more convenient, the guide pipe 17 is provided with the gas outlet 26 and the liquid outlet 19, the gas outlet 26 is connected with the gas collecting device 20, the gas collecting device 20 comprises a gas collecting tank 21 and a gas guide pipe 22, one end of the gas guide pipe 22 is connected with the gas outlet 26 of the guide pipe 17, the other end of the gas guide pipe 22 is connected with the gas collecting tank 21, the gas collecting tank 21 is provided with a transferring outlet 23 for transferring gas, when the gas pressure in the tank body 1 exceeds the maximum pressure born by the bursting piece 16, the bursting piece 16 bursts, the gas in the tank body 1 flows out of the connecting pipe 12 and flows out of the gas outlet 26 of the guide pipe 17, finally flows to the gas collecting tank 21, the pressure relief function is realized, the internal gas pressure of the tank body 1 is not excessively high, and the tank body 1 is damaged, the gas collecting tank 21 can carry out secondary treatment on leaked gas or transfer the leaked gas to other gas treatment units so as to ensure that the gas collecting tank 21 cannot be overpressured, due to the arrangement of the gas collecting device 20, the leaked gas cannot affect surrounding staff, a liquid outlet 19 of the conduit 17 is connected with a liquid storage tank 24, a first liquid leakage valve 25 is arranged between the conduit 17 and the liquid storage tank 24, when the pressure of the gas in the tank 1 is too high to cause the bursting piece 16 to be burst but not enough to damage the tank 1, the first liquid leakage valve 25 is in a closed state so as to prevent the leaked gas from flowing into the liquid storage tank 24, and when the pressure sensor detects that the internal gas pressure of the tank 1 is suddenly increased, the first liquid leakage valve 25 and the second liquid leakage valve 15 are simultaneously opened, and liquid in the tank 1 is timely transferred into the liquid storage tank 24 through the conduit 17 so as to prevent unnecessary waste caused by damage of the tank 1 due to overpressure.

The principle of the embodiment of the application is as follows: during normal operation, raw materials are put into the tank body 1 from the feed inlet 3, synthesis gas is introduced into the tank body 1 from the air inlet, the raw materials are stirred by the stirring device 5, the first liquid release valve 25 and the second liquid release valve 15 are closed, gas in the tank body 1 has certain pressure but is insufficient to damage the bursting element 16, when the air pressure in the tank body 1 is too high, the maximum pressure bearing value of the bursting element 16 is exceeded, the bursting element 16 bursts, the gas flows to the gas collecting device 20 through the guide pipe 17, thereby realizing the pressure relief function, ensuring that the tank body 1 cannot be damaged due to the too high internal gas pressure, when the air pressure sensor detects that the internal gas pressure of the tank body 1 is suddenly increased so that the gas collecting device 20 cannot timely relieve pressure, the first liquid release valve 25 and the second liquid release valve 15 are simultaneously opened, the internal liquid in the tank body 1 is timely transferred into the liquid storage tank 24 through the guide pipe 17, unnecessary waste is prevented, the sealing 18 on the guide pipe 17 can be directly opened when the pipe 17 needs to be replaced, the bursting element 16 is replaced, and then a new bursting element 16 can be replaced.

The embodiments of this embodiment are all preferred embodiments of the present application, and are not intended to limit the scope of the present application, in which like parts are denoted by like reference numerals. Therefore: all equivalent changes in structure, shape and principle of this application should be covered in the protection scope of this application.

Claims

1. The anaerobic fermentation reactor with the overpressure protection comprises a tank body and is characterized in that: the tank body is internally provided with a stirring device, one side of the tank body is provided with an overpressure protection device, the overpressure protection device comprises a connecting pipe which is sealed with the tank body and is connected in a conducting way, the connecting pipe is provided with a bursting piece with the highest bearing pressure smaller than that of the tank body, the connecting pipe is connected with a conduit for releasing gas or liquid, and the conduit is connected with a gas collecting device.

2. The anaerobic fermentation reactor with overpressure protection according to claim 1, wherein: the connecting pipe is divided into a ventilation end and a liquid ventilation end, the ventilation end and the liquid ventilation end are both connected with the tank body, the bursting piece is detachably arranged between the ventilation end and the liquid ventilation end, and the guide pipe is provided with a closed door.

3. An anaerobic fermentation reactor with overpressure protection according to claim 2, characterized in that: the guide pipe is connected with a liquid storage tank, a first liquid leakage valve is arranged between the guide pipe and the liquid storage tank, and a second liquid leakage valve is arranged at the liquid passing end.

4. An anaerobic fermentation reactor with overpressure protection according to claim 2, characterized in that: the gas collecting device comprises a gas collecting tank and a gas guide pipe, one end of the gas guide pipe is connected with the guide pipe, and the other end of the gas guide pipe is connected with the gas collecting tank.

5. The anaerobic fermentation reactor with overpressure protection according to claim 1, wherein: the stirring device comprises an axial flow stirrer, a radial flow stirrer and a stirring motor, wherein the axial flow stirrer and the radial flow stirrer are arranged on the main shaft, the stirring motor is used for driving the axial flow stirrer and the radial flow stirrer to rotate, and the axial flow stirrer and the radial flow stirrer are connected with an output shaft of the stirring motor in a linkage way through the main shaft.