Multi-fermentation-tank tail gas parallel exhaust system based on air pressure self-adaptive switching

Abstract

The utility model discloses a multi-fermentation tank tail gas parallel exhaust system based on air pressure adaptive switching, which comprises a DCS (Distributed Control System) controller and a plurality of fermentation tanks, the upper end of each fermentation tank is provided with a pressure gauge and an exhaust pipe, the exhaust pipe is connected with a first exhaust branch pipe and a second exhaust branch pipe, the first exhaust branch pipe is connected with a tail gas exhaust header pipe, and the second exhaust branch pipe is connected with the tail gas exhaust header pipe. The first discharge branch pipe is connected with the high-pressure steam discharge header pipe, the second discharge branch pipe is connected with the high-pressure steam discharge header pipe, a first manual valve and a first automatic valve are arranged on the first discharge branch pipe, a second manual valve, a proportional electromagnetic valve and a second automatic valve are arranged on the second discharge branch pipe, and the DCS controller is connected with the pressure gauge, the first automatic valve, the proportional electromagnetic valve and the second automatic valve. The first discharge branch pipe is used for discharging micro-positive pressure gas; and the second discharge branch pipe is used for discharging steam. The DCS controller automatically switches the first automatic valve and the second automatic valve according to the pressure value detected by the pressure gauge, parallel discharge of micro-positive pressure gas and steam is achieved, and the pressure fluctuation range is smaller than or equal to + / -5%.

Description

Technical Field

[0001] This utility model belongs to the technical field of biological fermentation equipment, specifically relating to a parallel exhaust gas system for multiple fermentation tanks based on adaptive gas pressure switching. Background Technology

[0002] like Figure 1 As shown, the existing multi-fermentation tank exhaust gas system in vaccine manufacturing plants uses a parallel branch design, with each branch connected to the main pipeline and exhaust gas treatment system via fixed valves. Before the upgrade, all branch valves were normally open, and emissions were only regulated by the main pipeline pressure, lacking adaptability to different operating conditions. When multiple units operate simultaneously, with high-pressure exhaust steam (0.2-0.3 MPa) and slightly positive pressure exhaust coexisting, the high-pressure steam can back-impact the low-pressure branch, causing pressure fluctuations in the slightly positive pressure exhaust equipment. The fixed valves cannot be dynamically adjusted, requiring manual intervention to switch branches, resulting in response delays and operational risks. Furthermore, the existing system lacks an independent high-pressure steam discharge channel, making the main pipeline prone to blockage by steam condensate. Utility Model Content

[0003] The purpose of this invention is to solve the problems of existing technologies and provide a parallel exhaust gas system for multiple fermenters based on adaptive pressure switching. The exhaust pipe is connected to a first and second exhaust branch pipe, which is connected to the main exhaust gas pipe. The first exhaust branch pipe is used to discharge slightly positive pressure gas. The second exhaust branch pipe is connected to the main high-pressure steam exhaust pipe and is used to discharge steam. Based on the pressure value detected by the pressure gauge, the DCS controller automatically switches between the first and second automatic valves to achieve parallel discharge of slightly positive pressure gas and steam, with a pressure fluctuation range ≤ ±5%.

[0004] This utility model is achieved through the following technical solution:

[0005] A multi-fermenter exhaust gas parallel emission system based on pressure adaptive switching includes a DCS controller and multiple fermenters. Each fermenter is equipped with a pressure gauge and an exhaust pipe at its upper end. The exhaust pipe is connected to a first exhaust branch pipe and a second exhaust branch pipe. The first exhaust branch pipe is connected to the exhaust gas main exhaust pipe, and the second exhaust branch pipe is connected to the high-pressure steam exhaust main exhaust pipe. The first exhaust branch pipe is equipped with a first manual valve and a first automatic valve, and the second exhaust branch pipe is equipped with a second manual valve, a proportional solenoid valve, and a second automatic valve. The DCS controller is connected to the pressure gauge, the first automatic valve, the proportional solenoid valve, and the second automatic valve.

[0006] Preferably, the first automatic valve and / or the second automatic valve are selected from pneumatic angle seat valves, electric angle seat valves, pneumatic ball valves, electric ball valves, pneumatic diaphragm valves, or electric diaphragm valves; wherein, from an economic point of view, pneumatic angle seat valves or electric angle seat valves are further preferred, and from an effectiveness point of view, pneumatic diaphragm valves or electric diaphragm valves are further preferred.

[0007] Preferably, the first manual valve and / or the second manual valve are manual diaphragm valves.

[0008] Preferably, a one-way valve is also provided on the second discharge branch pipe.

[0009] Preferably, a first manual valve and a first automatic valve are sequentially installed on the first discharge branch pipe.

[0010] Preferably, the second discharge branch pipe is provided with a second manual valve, a proportional solenoid valve and a second automatic valve in sequence.

[0011] Preferably, multiple fermenters are connected in parallel.

[0012] Compared with the prior art, this utility model has the following advantages and beneficial effects:

[0013] I. The present invention provides a parallel exhaust gas system for multiple fermenters based on adaptive pressure switching. The exhaust pipe is connected to a first exhaust branch pipe and a second exhaust branch pipe. The first exhaust branch pipe is connected to the exhaust gas main pipe and is used for discharging slightly positive pressure gas. The second exhaust branch pipe is connected to the high-pressure steam exhaust main pipe and is used for discharging steam. Based on the pressure value detected by the pressure gauge, the DCS controller automatically switches between the first and second automatic valves to achieve parallel discharge of slightly positive pressure gas and steam, with a pressure fluctuation range ≤ ±5%.

[0014] II. The parallel exhaust gas system for multiple fermenters based on adaptive pressure switching provided by this utility model has a one-way valve to prevent high-pressure steam from flowing back into the first exhaust branch pipe.

[0015] Third, the multi-fermentation tank exhaust gas parallel emission system based on gas pressure adaptive switching provided by this utility model has an automatic switching between the first automatic valve and the second automatic valve, which reduces the frequency of manual inspection from once every 2 hours to once every 8 hours, meeting the GMP unattended operation requirements.

[0016] IV. The parallel exhaust gas system for multi-fermentation tanks based on adaptive pressure switching provided by this utility model has a second exhaust branch pipe connected to the high-pressure steam exhaust main pipe, and the second exhaust branch pipe is used to exhaust steam; the steam condensate backflow is reduced by 30% through an independent pressure relief channel, thereby reducing heat loss. Attached Figure Description

[0017] Figure 1This is a schematic diagram of the existing technology;

[0018] Figure 2 This is a schematic diagram of the structure of this utility model.

[0019] The components include: 1. Fermentation tank; 2. Pressure gauge; 3. Exhaust pipe; 4. First exhaust branch pipe; 5. Second exhaust branch pipe; 6. Tail gas exhaust main pipe; 7. High-pressure steam exhaust main pipe; 8. First manual valve; 9. First automatic valve; 10. Second manual valve; 11. Proportional solenoid valve; 12. Second automatic valve; 13. Check valve. Detailed Implementation

[0020] The present invention will be further described in detail below with reference to the embodiments, but the implementation of the present invention is not limited thereto.

[0021] Example 1

[0022] This embodiment provides a parallel exhaust gas system for multiple fermenters based on adaptive pressure switching, including a DCS controller and multiple fermenters 1. Each fermenter 1 is equipped with a pressure gauge 2 and an exhaust pipe 3 at its upper end. The exhaust pipe 3 is connected to a first exhaust branch pipe 4 and a second exhaust branch pipe 5. The first exhaust branch pipe 4 is connected to the exhaust gas main exhaust pipe 6, and the second exhaust branch pipe 5 is connected to the high-pressure steam exhaust main exhaust pipe 7. The first exhaust branch pipe 4 is equipped with a first manual valve 8 and a first automatic valve 9, and the second exhaust branch pipe 5 is equipped with a second manual valve 10, a proportional solenoid valve 11, and a second automatic valve 12. The DCS controller is connected to the pressure gauge 2, the first automatic valve 9, the proportional solenoid valve 11, and the second automatic valve 12. The first manual valve 8 and the second manual valve 10 ensure the closure and opening of the pipeline in special circumstances such as power outages, gas outages, or pipeline maintenance. The first automatic valve 9 and / or the second automatic valve 12 can be selected from a pneumatic angle seat valve, an electric angle seat valve, a pneumatic ball valve, an electric ball valve, a pneumatic diaphragm valve, or an electric diaphragm valve. From an economic point of view, the pneumatic / electric angle seat valve is the best, while from an effectiveness point of view, the pneumatic / electric diaphragm valve is the best. The price and effectiveness of the ball valve are between those of the angle seat valve and the diaphragm valve, and can be selected as needed.

[0023] Example 2

[0024] Based on Example 1, this example makes the following optimizations, such as... Figure 2 As shown:

[0025] Both the first automatic valve 9 and the second automatic valve 12 are pneumatic angle seat valves.

[0026] Both the first manual valve 8 and the second manual valve 10 are manual diaphragm valves.

[0027] The second discharge branch pipe 5 is also equipped with a one-way valve 13.

[0028] The first discharge branch pipe 4 is provided with a first manual valve 8 and a first automatic valve 9 in sequence.

[0029] The second discharge branch pipe 5 is sequentially equipped with a second manual valve 10, a proportional solenoid valve 11, and a second automatic valve 12.

[0030] Multiple fermenters are connected in parallel.

[0031] The DCS controller, pressure gauge 2, pneumatic angle seat valve, manual diaphragm valve, proportional solenoid valve 11, and check valve 13 mentioned above are all existing technologies and will not be described in detail here.

[0032] When this utility model is in operation, it includes the following modes:

[0033] (1) Micro positive pressure exhaust mode: If the pressure value displayed by pressure gauge 2 is ≤0.15MPa, the DCS controller controls the first automatic valve 9 to open and the proportional solenoid valve 11 and the second automatic valve 12 to close.

[0034] (2) High-pressure steam exhaust mode: If the pressure value displayed by pressure gauge 2 is ≥0.2MPa, the DCS controller controls the first automatic valve 9 to close, the proportional solenoid valve 11 to open fully, and the second automatic valve 12 to open.

[0035] (3) Mixed mode: When the pressure value displayed by pressure gauge 2 is >0.15MPa and <0.2MPa, the first automatic valve 9 and the second automatic valve 12 remain open; at the same time, the proportional solenoid valve 11 opens and adjusts its opening according to the pressure value. When the exhaust reaches a suitable air pressure (≤0.15MPa), the proportional solenoid valve 11 closes the valve and closes the second automatic valve 12, thereby switching to the micro positive pressure exhaust mode.

[0036] Compared with the prior art, this utility model has the following advantages and beneficial effects:

[0037] I. The present invention provides a parallel exhaust gas system for multiple fermenters 1 based on pressure adaptive switching. The exhaust pipe 3 is connected to the first exhaust branch pipe 4 and the second exhaust branch pipe 5. The first exhaust branch pipe 4 is connected to the exhaust gas main pipe 6 and is used for discharging slightly positive pressure gas. The second exhaust branch pipe 5 is connected to the high-pressure steam exhaust main pipe 7 and is used for discharging steam. Based on the pressure value detected by the pressure gauge 2, the DCS controller automatically switches between the first automatic valve 9 and the second automatic valve 12 to achieve parallel discharge of slightly positive pressure gas and steam, with a pressure fluctuation range ≤ ±5%. The working time of the first automatic valve 9 and the second automatic valve 12 is <0.5s, and the control signal input time to the valves is typically less than 100ms. The advantages include: simple valve structure, no complex electronic components, low maintenance and high reliability, high cleanliness and easy cleaning, adaptability to high-precision control requirements, and prevention of cross-contamination.

[0038] II. The parallel exhaust gas system of the multi-fermentation tank 1 based on gas pressure adaptive switching provided by this utility model has a one-way valve 13 to prevent high-pressure steam from flowing back into the first exhaust branch pipe 4.

[0039] III. The multi-fermentation tank 1 exhaust gas parallel emission system based on gas pressure adaptive switching provided by this utility model has the first automatic valve 9 and the second automatic valve 12 automatically switching, reducing the frequency of manual inspection from once every 2 hours to once every 8 hours, which meets the GMP unattended operation requirements.

[0040] IV. The exhaust gas parallel emission system of the multi-fermentation tank 1 based on gas pressure adaptive switching provided by this utility model has a second emission branch pipe 5 connected to the high-pressure steam emission main pipe 7. The second emission branch pipe 5 is used to discharge steam. The steam condensate backflow is reduced by 30% through an independent pressure relief channel, thereby reducing heat energy loss.

[0041] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Any simple modifications or equivalent changes made to the above embodiments based on the technical essence of the present utility model shall fall within the protection scope of the present utility model.

Claims

1. A multi-fermenter off-gas parallel discharge system based on barometric self-adaptive switching, characterized in that: The system includes a DCS controller and multiple fermenters (1). Each fermenter (1) is equipped with a pressure gauge (2) and an exhaust pipe (3) at its upper end. The exhaust pipe (3) is connected to a first exhaust branch pipe (4) and a second exhaust branch pipe (5). The first exhaust branch pipe (4) is connected to a tail gas exhaust main pipe (6). The second exhaust branch pipe (5) is connected to a high-pressure steam exhaust main pipe (7). The first exhaust branch pipe (4) is equipped with a first manual valve (8) and a first automatic valve (9). The second exhaust branch pipe (5) is equipped with a second manual valve (10), a proportional solenoid valve (11), and a second automatic valve (12). The DCS controller is connected to the pressure gauge (2), the first automatic valve (9), the proportional solenoid valve (11), and the second automatic valve (12).

2. The multi-fermenter off-gas parallel venting system based on barometric pressure adaptive switching of claim 1, wherein: The first automatic valve (9) and / or the second automatic valve (12) are selected from pneumatic angle seat valves, electric angle seat valves, pneumatic ball valves, electric ball valves, pneumatic diaphragm valves or electric diaphragm valves.

3. The barometric pressure adaptive switching based multi-fermenter off-gas parallel venting system as claimed in claim 1, wherein: The first manual valve (8) and / or the second manual valve (10) are manual diaphragm valves.

4. The barometric pressure adaptive switching based multi-fermenter off-gas parallel venting system as claimed in claim 1, wherein: A one-way valve (13) is also installed on the second discharge branch pipe (5).

5. The barometric pressure adaptive switching based multi-fermenter off-gas parallel venting system as claimed in claim 1, wherein: The first discharge branch pipe (4) is provided with a first manual valve (8) and a first automatic valve (9) in sequence.

6. The barometric pressure adaptive switching based multi-fermenter off-gas parallel venting system as claimed in claim 1, wherein: The second discharge branch pipe (5) is provided with a second manual valve (10), a proportional solenoid valve (11), and a second automatic valve (12) in sequence.

7. The barometric pressure adaptive switching based multi-fermenter off-gas parallel venting system as claimed in claim 1, wherein: Multiple fermenters (1) are connected in parallel.

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