CN111909840A - Carbon dioxide utilization control system for preparing protein by fermentation method - Google Patents

Abstract

The invention provides a carbon dioxide utilization control system for protein production by fermentation, including a fermentation tank, an industrial exhaust gas inlet pipeline, a carbon dioxide gas inlet pipeline and a gas buffer tank. The fermentation tank is provided with a first gas inlet and a tail gas outlet. , the gas buffer tank is provided with a second air inlet and an air outlet, the industrial exhaust gas inlet line and the carbon dioxide gas inlet line are both connected to the second air inlet, and the air outlet is connected to the The first air inlet, the tail gas outlet is connected with a tail gas pipeline, and the control system makes full use of the effective gas in the factory tail gas to participate in the fermentation process, so that it can be converted into a product protein with high added value, and at the same time capture The set utilizes the CO2 in the factory and reduces carbon emissions.

Description

A carbon dioxide utilization control system for protein production by fermentation

technical field

The invention relates to the field of biotechnology, in particular to a carbon dioxide utilization control system for protein production by fermentation.

Background technique

Coal chemical, oil refining, steel mills, smelting, coking and other enterprises have a large amount of industrial exhaust gas. The exhaust gas is characterized by a certain component of H2, CO, CH4, CO2, N2, etc. The conventional treatment method is to send it to the boiler for combustion Part of the steam is produced by-product, and RTO (Regenerative Thermal Oxidizer, referred to as RTO) is also used due to its low calorific value. These methods cannot use the effective gases such as H2 and CO, but only generate H2O and CO2 through combustion, which are finally emitted to the atmosphere. A large amount of CO2 cannot solve the fundamental problem. In recent years, as the global warming has seriously affected people's health, carbon dioxide as a greenhouse gas is particularly prominent, causing the temperature to rise. If carbon dioxide emissions are not reduced, the resulting global warming will be catastrophic to human beings .  Therefore, the rational use of captured CO2 technology is particularly important.

SUMMARY OF THE INVENTION

The technical problem to be solved by the present invention is that the existing method for treating industrial exhaust gas cannot utilize the effective gases such as H2 and CO2, but only generates H2O and CO2 through combustion, and finally discharges a large amount of CO2 into the atmosphere, which has a certain impact on the environment. , The present invention provides a carbon dioxide utilization control system for protein production by fermentation to solve the above problems.

The technical scheme adopted by the present invention to solve the technical problem is as follows: a carbon dioxide utilization control system for protein production by fermentation method, comprising a fermentation tank, an industrial exhaust gas inlet pipeline, a carbon dioxide gas inlet pipeline and a gas buffer tank, and the fermentation tank is provided with There is a first air inlet and a tail gas outlet, the gas buffer tank is provided with a second air inlet and an air outlet, and the industrial tail gas inlet line and the carbon dioxide gas inlet line are both connected to the second inlet The air outlet is connected to the first air inlet, and the exhaust gas outlet is connected with an exhaust gas pipeline.

Further: the control system also includes a flow control module, a conversion rate calculation module and a precise calculation feedback module that are electrically connected to each other, and the flow control module collects the information in the industrial exhaust gas inlet pipeline and the exhaust gas pipeline, and send the collected information to the conversion rate calculation module, the conversion rate calculation module calculates the information to obtain the conversion rate, and sends the conversion rate to the precise calculation feedback module, the precise calculation The feedback module generates an instruction according to the conversion rate and sends it to the flow control module, and the flow control module executes the instruction.

Further: the information includes the gas flow rate and the concentration of H2, CO, and CO2 in the industrial exhaust gas inlet pipeline and the exhaust gas pipeline.

Further: the flow control module includes a first flow meter and a first analyzer arranged on the industrial exhaust gas intake pipeline, and the first analyzer is used to measure H H2 in the industrial exhaust gas intake pipeline, CO, CO2 concentration, the first flow meter is used to measure the flow of gas in the industrial exhaust gas inlet pipeline; the flow control module includes a second flow meter and a second analyzer arranged on the exhaust gas pipeline , the second flow meter is used to measure the flow rate of the gas in the exhaust gas pipeline, and the second analyzer is used to measure the concentrations of H2, CO, and CO2 in the exhaust gas pipeline; the flow control module also includes a set of The third control valve and the third flowmeter on the carbon dioxide gas inlet line; the third control valve and the third flowmeter are electrically connected, and the third flowmeter is used to execute the precision calculation feedback module. The opening degree of the third control valve is instructed and controlled to control the flow rate of the gas in the carbon dioxide gas inlet line into the gas buffer tank.

The beneficial effect of the present invention is that the carbon dioxide utilization control system for protein production by fermentation of the present invention makes full use of the effective gas in the exhaust gas of the factory to participate in the fermentation process, so that it can be converted into a product protein with high added value, and at the same time Capture utilizes CO2 in the factory, reducing carbon emissions;

The control system is based on the flow rate of the first flowmeter in the industrial exhaust gas intake line, the concentration of the first analyzer H2, CO, CO2, the concentration of the second analyzer H2, CO, CO2 in the exhaust gas line and the second flowmeter. Flow, calculate the flow value according to the demand and generate the flow demand command, the control system sends a signal to the third flowmeter of the carbon dioxide gas intake line according to the flow demand command, and the third flowmeter controls the third control valve on the carbon dioxide gas intake line The opening degree is used to control the flow of carbon dioxide involved in the fermentation to achieve stable operation of protein product production.

Description of drawings

The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

FIG. 1 is a schematic structural diagram of a carbon dioxide utilization control system for protein production by fermentation of the present invention.

In the figure, 1, fermentation tank, 2, industrial exhaust gas inlet pipeline, 3, carbon dioxide gas inlet pipeline, 4, gas buffer tank, 5, first gas inlet, 6, exhaust gas outlet, 7, second gas inlet, 8. Air outlet, 9. Tail gas pipeline, 10. Conversion rate calculation module, 11. Precision calculation feedback module, 13. First flowmeter, 14. First analyzer, 15, Second flowmeter, 16, Second analysis instrument, 17, the third control valve, 18, the third flow meter.

Detailed ways

The following describes in detail the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary, only used to explain the present invention, and should not be construed as a limitation of the present invention. On the contrary, embodiments of the present invention include all changes, modifications and equivalents falling within the spirit and scope of the appended claims.

In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", " Rear, Left, Right, Vertical, Horizontal, Top, Bottom, Inner, Outer, Axial, Radial, Circumferential, etc. The indicated orientation or positional relationship is based on the orientation or positional relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the indicated device or element must have a specific orientation or a specific orientation. construction and operation, and therefore should not be construed as limiting the invention.

Furthermore, the terms "first," "second," etc. are used for descriptive purposes only and should not be construed to indicate or imply relative importance. In the description of the present invention, it should be noted that, unless otherwise expressly specified and limited, the terms "connected" and "connected" should be understood in a broad sense, for example, it may be a fixed connection, a detachable connection, or an integral connection. Ground connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood in specific situations. Also, in the description of the present invention, unless otherwise specified, "plurality" means two or more.

Any description of a process or method in the flowcharts or otherwise described herein may be understood to represent a module, segment or portion of code comprising one or more executable instructions for implementing a specified logical function or step of the process , and the scope of the preferred embodiments of the invention includes alternative implementations in which the functions may be performed out of the order shown or discussed, including performing the functions substantially concurrently or in the reverse order depending upon the functions involved, which should It is understood by those skilled in the art to which the embodiments of the present invention belong.

As shown in Figure 1, the present invention provides a carbon dioxide utilization control system for protein production by fermentation, comprising a fermentation tank 1, an industrial exhaust gas inlet line 2, a carbon dioxide gas inlet line 3 and a gas buffer tank 4, the fermentation tank 1 A first air inlet 5 and a tail gas outlet 6 are provided on it, the gas buffer tank 4 is provided with a second air inlet 7 and an air outlet 8, the industrial exhaust gas inlet line 2 and the carbon dioxide gas inlet line 3 are connected to the second air inlet 7 , the air outlet 8 is connected to the first air inlet 5 , and the exhaust gas outlet 6 is connected with an exhaust gas pipeline 9 .

During operation, the factory exhaust gas transported by the industrial exhaust gas inlet line 2 and the carbon dioxide gas transported by the carbon dioxide gas inlet line 3 enter the gas buffer tank 4 at the same time, and enter the fermentation tank 1 after the pressure fluctuation of the buffer gas in the gas buffer tank 4 to participate in the fermentation tank 1. Fermentation work; since the main components in industrial exhaust gas are H2, CO, CH4, CO2, N2, the amount of CO in the industrial exhaust gas alone is insufficient, and the utilization rate of effective gas cannot be exerted. share CO2, so that it participates in fermentation together with industrial exhaust gas. The method makes full use of the effective gas in the exhaust gas of the factory to convert it into a high value-added product protein, and at the same time captures and utilizes the CO2 in the factory, reduces carbon emissions and produces high value-added products, gas The setting of the buffer tank 4 is to stabilize the pressure of the gas pipeline entering the first air inlet 5 in the fermenter 1, to weaken the influence of the fluctuation of the carbon dioxide flow on the system pressure, to help improve the conversion rate of effective gas, and to reduce the exhaust gas outlet 6. amount of gas.

The control system also includes a flow control module, a conversion rate calculation module 10 and a precise calculation feedback module 11 that are electrically connected to each other. The information in the pipeline 9 is collected, and the collected information is sent to the conversion rate calculation module 10, and the conversion rate calculation module 10 calculates the information to obtain the conversion rate, and sends the conversion rate to the conversion rate calculation module 10. The precise calculation feedback module 11, the precise calculation feedback module 11 generates an instruction according to the conversion rate and sends it to the flow control module, and the flow control module executes the instruction.

The information includes the gas flow rates and the concentrations of H2, CO, and CO2 in the industrial exhaust gas inlet line 2 and the exhaust gas line 9.

The flow control module includes a first flow meter 13 and a first analyzer 14 arranged on the industrial exhaust gas intake line 2, and the first analyzer 14 is used to measure H2 in the industrial exhaust gas intake line 2 , CO, CO2 concentration, the first flow meter 13 is used to measure the flow rate of the gas in the industrial exhaust gas inlet line 2; the flow control module includes a second flow meter 15 arranged on the exhaust gas line 9 and a second analyzer 16, the second flow meter 15 is used to measure the flow rate of the gas in the exhaust gas pipeline 9, and the second analyzer 16 is used to measure the concentration of H2, CO, CO2 in the exhaust gas pipeline 9 ; The flow control module also includes a third control valve 17 and a third flow meter 18 arranged on the carbon dioxide gas inlet line 3; the third control valve 17 and the third flow meter 18 are electrically connected, so The third flow meter 18 is used to execute the instructions of the precise calculation feedback module 11 and control the opening of the third control valve 17, so as to control the flow of the gas in the carbon dioxide gas inlet line 3 into the gas buffer tank 4. flow.

Example: The industrial exhaust gas containing H2, CO, CH4, CO2, N2 components, the pressure is about 0.8MPag, enters the fermentation tank 1 through the gas buffer tank 4, and the first flow meter 13 is used to measure the industrial exhaust gas inlet line 2. Raw material flow, the first analyzer 14 is used to measure the concentration of effective gases H2, CO, and CO2 entering the industrial exhaust gas inlet line 2; the carbon dioxide gas from the carbon dioxide gas inlet line 3, the pressure is about 0.8MPag, and the carbon dioxide gas inlet The pipeline 3 enters the fermentation tank 1 after passing through the gas buffer tank 4, and the third flow meter 18 is used to measure the flow rate of the carbon dioxide gas inlet pipeline 3, and the gas outlet of the gas buffer tank 4 is connected with the gas inlet of the fermentation tank 1; the fermentation tank 1 A second flow meter 15 and a second analyzer 16 are provided in the tail gas pipeline 9; the second flow meter 15 is used to measure the tail gas flow of the tail gas pipeline 9, and the second analyzer 16 is used to measure the H2, CO, CO2 of the tail gas pipeline 9 concentration. The conversion rate calculation module 10 is respectively connected with the first analyzer 14, the second analyzer 16, the first flow meter 13, and the second flow meter 15; it is used to calculate the conversion rate of the effective gas components H2, CO, CO2, and calculate The obtained conversion rate is sent to the precise calculation feedback module 11 to generate an instruction, and the instruction is sent to the third flow meter 18 to control the third control valve 17 to work to control the flow rate of the gas in the carbon dioxide gas inlet line 3 .

In the description of this specification, description with reference to the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples", etc., mean specific features described in connection with the embodiment or example , structure, material or feature is included in at least one embodiment or example of the present invention. In this specification, schematic representations of such terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Taking the above ideal embodiments according to the present invention as inspiration, and through the above description, relevant personnel can make various changes and modifications without departing from the technical idea of the present invention. The technical scope of the present invention is not limited to the contents in the specification, and the technical scope must be determined according to the scope of the claims.

Claims (4)

1. A carbon dioxide utilization control system for preparing protein by a fermentation method is characterized in that: including fermentation cylinder (1), industry tail gas pipeline (2) that admits air, carbon dioxide gas pipeline (3) and gas buffer tank (4), be provided with first air inlet (5) and tail gas outlet (6) on fermentation cylinder (1), be provided with second air inlet (7) and gas outlet (8) on gas buffer tank (4), industry tail gas pipeline (2) that admits air with carbon dioxide gas pipeline (3) that admits air all communicates second air inlet (7), gas outlet (8) intercommunication first air inlet (5), tail gas outlet (6) are connected with tail gas pipeline (9).

2. The system for controlling carbon dioxide utilization in a fermentation process for producing protein according to claim 1, wherein: the control system further comprises a flow control module, a conversion rate calculation module (10) and a precision calculation feedback module (11) which are electrically connected with each other, the flow control module collects information in the industrial tail gas inlet pipeline (2) and the tail gas pipeline (9), the collected information is sent to the conversion rate calculation module (10), the conversion rate calculation module (10) calculates the information to obtain a conversion rate, the conversion rate is sent to the precision calculation feedback module (11), the precision calculation feedback module (11) sends a conversion rate generation instruction to the flow control module, and the flow control module executes the instruction.

3. The system for controlling carbon dioxide utilization in a fermentation process for producing protein according to claim 2, wherein: the information comprises the gas flow and the concentration of H2, CO2 in the industrial exhaust gas intake line (2) and the exhaust gas line (9).

4. The system for controlling carbon dioxide utilization in a fermentation process for producing protein according to claim 2, wherein: the flow control module comprises a first flow meter (13) and a first analyzer (14) which are arranged on the industrial tail gas intake line (2), the first analyzer (14) is used for measuring the concentration of H2, CO, CO2 in the industrial tail gas intake line (2), and the first flow meter (13) is used for metering the flow of gas in the industrial tail gas intake line (2);

the flow control module comprises a second flow meter (15) and a second analyzer (16) arranged on the exhaust line (9), the second flow meter (15) being adapted to meter the flow of gas in the exhaust line (9), the second analyzer (16) being adapted to measure the concentration of H2, CO, CO2 in the exhaust line (9);

the flow control module further comprises a third control valve (17) and a third flow meter (18) arranged on the carbon dioxide gas inlet line (3); the third control valve (17) is electrically connected with a third flow meter (18), and the third flow meter (18) is used for executing the instruction of the precise calculation feedback module (11) and controlling the opening of the third control valve (17) so as to control the flow of the gas in the carbon dioxide gas inlet pipeline (3) entering the gas buffer tank (4).

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