CN110777066B - System and method for controlling concentration of carbon monoxide in fermentation air inlet - Google Patents

System and method for controlling concentration of carbon monoxide in fermentation air inlet Download PDF

Info

Publication number
CN110777066B
CN110777066B CN201911069235.5A CN201911069235A CN110777066B CN 110777066 B CN110777066 B CN 110777066B CN 201911069235 A CN201911069235 A CN 201911069235A CN 110777066 B CN110777066 B CN 110777066B
Authority
CN
China
Prior art keywords
fermentation
tail gas
concentration
gas
flow
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN201911069235.5A
Other languages
Chinese (zh)
Other versions
CN110777066A (en
Inventor
莫志朋
佟淑环
宋庆坤
陈超
蔺兴法
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Beijing Shougang Langze Technology Co ltd
Original Assignee
Beijing Shougang Langze Technology Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Beijing Shougang Langze Technology Co ltd filed Critical Beijing Shougang Langze Technology Co ltd
Priority to CN201911069235.5A priority Critical patent/CN110777066B/en
Publication of CN110777066A publication Critical patent/CN110777066A/en
Application granted granted Critical
Publication of CN110777066B publication Critical patent/CN110777066B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • C—CHEMISTRY; METALLURGY
    • C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
    • C12M—APPARATUS FOR ENZYMOLOGY OR MICROBIOLOGY; APPARATUS FOR CULTURING MICROORGANISMS FOR PRODUCING BIOMASS, FOR GROWING CELLS OR FOR OBTAINING FERMENTATION OR METABOLIC PRODUCTS, i.e. BIOREACTORS OR FERMENTERS
    • C12M21/00—Bioreactors or fermenters specially adapted for specific uses
    • C12M21/12—Bioreactors or fermenters specially adapted for specific uses for producing fuels or solvents
    • C—CHEMISTRY; METALLURGY
    • C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
    • C12M—APPARATUS FOR ENZYMOLOGY OR MICROBIOLOGY; APPARATUS FOR CULTURING MICROORGANISMS FOR PRODUCING BIOMASS, FOR GROWING CELLS OR FOR OBTAINING FERMENTATION OR METABOLIC PRODUCTS, i.e. BIOREACTORS OR FERMENTERS
    • C12M29/00—Means for introduction, extraction or recirculation of materials, e.g. pumps
    • C12M29/14—Pressurized fluid
    • C—CHEMISTRY; METALLURGY
    • C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
    • C12M—APPARATUS FOR ENZYMOLOGY OR MICROBIOLOGY; APPARATUS FOR CULTURING MICROORGANISMS FOR PRODUCING BIOMASS, FOR GROWING CELLS OR FOR OBTAINING FERMENTATION OR METABOLIC PRODUCTS, i.e. BIOREACTORS OR FERMENTERS
    • C12M29/00—Means for introduction, extraction or recirculation of materials, e.g. pumps
    • C12M29/24—Recirculation of gas
    • C—CHEMISTRY; METALLURGY
    • C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
    • C12M—APPARATUS FOR ENZYMOLOGY OR MICROBIOLOGY; APPARATUS FOR CULTURING MICROORGANISMS FOR PRODUCING BIOMASS, FOR GROWING CELLS OR FOR OBTAINING FERMENTATION OR METABOLIC PRODUCTS, i.e. BIOREACTORS OR FERMENTERS
    • C12M29/00—Means for introduction, extraction or recirculation of materials, e.g. pumps
    • C12M29/26—Conditioning fluids entering or exiting the reaction vessel
    • C—CHEMISTRY; METALLURGY
    • C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
    • C12M—APPARATUS FOR ENZYMOLOGY OR MICROBIOLOGY; APPARATUS FOR CULTURING MICROORGANISMS FOR PRODUCING BIOMASS, FOR GROWING CELLS OR FOR OBTAINING FERMENTATION OR METABOLIC PRODUCTS, i.e. BIOREACTORS OR FERMENTERS
    • C12M41/00—Means for regulation, monitoring, measurement or control, e.g. flow regulation
    • C—CHEMISTRY; METALLURGY
    • C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
    • C12M—APPARATUS FOR ENZYMOLOGY OR MICROBIOLOGY; APPARATUS FOR CULTURING MICROORGANISMS FOR PRODUCING BIOMASS, FOR GROWING CELLS OR FOR OBTAINING FERMENTATION OR METABOLIC PRODUCTS, i.e. BIOREACTORS OR FERMENTERS
    • C12M41/00—Means for regulation, monitoring, measurement or control, e.g. flow regulation
    • C12M41/30—Means for regulation, monitoring, measurement or control, e.g. flow regulation of concentration
    • C12M41/34—Means for regulation, monitoring, measurement or control, e.g. flow regulation of concentration of gas
    • C—CHEMISTRY; METALLURGY
    • C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
    • C12M—APPARATUS FOR ENZYMOLOGY OR MICROBIOLOGY; APPARATUS FOR CULTURING MICROORGANISMS FOR PRODUCING BIOMASS, FOR GROWING CELLS OR FOR OBTAINING FERMENTATION OR METABOLIC PRODUCTS, i.e. BIOREACTORS OR FERMENTERS
    • C12M41/00—Means for regulation, monitoring, measurement or control, e.g. flow regulation
    • C12M41/48—Automatic or computerized control
    • C—CHEMISTRY; METALLURGY
    • C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
    • C12Q—MEASURING OR TESTING PROCESSES INVOLVING ENZYMES, NUCLEIC ACIDS OR MICROORGANISMS; COMPOSITIONS OR TEST PAPERS THEREFOR; PROCESSES OF PREPARING SUCH COMPOSITIONS; CONDITION-RESPONSIVE CONTROL IN MICROBIOLOGICAL OR ENZYMOLOGICAL PROCESSES
    • C12Q3/00—Condition responsive control processes

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Zoology (AREA)
  • Bioinformatics & Cheminformatics (AREA)
  • Genetics & Genomics (AREA)
  • General Health & Medical Sciences (AREA)
  • Biotechnology (AREA)
  • Microbiology (AREA)
  • Biochemistry (AREA)
  • General Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Sustainable Development (AREA)
  • Analytical Chemistry (AREA)
  • Molecular Biology (AREA)
  • Computer Hardware Design (AREA)
  • Immunology (AREA)
  • Proteomics, Peptides & Aminoacids (AREA)
  • Treatment Of Sludge (AREA)

Abstract

The invention discloses a carbon monoxide concentration control system and a method in fermentation air inlet, wherein the system comprises the following components: raw material air inlet pipeline, fermentation tank, tail gas reflux pipeline, control terminal and concentration control device; a first detection port is arranged at the air inlet of the raw material air inlet pipeline; the air inlet of the fermentation tank is provided with a second detection port, and the air outlet of the fermentation tank is provided with a third detection port; the air outlet of the tail gas reflux pipeline is arranged between the first detection port and the second detection port; the first end of control terminal is connected with first detection mouth, second detection mouth and third detection mouth, and the second end of control terminal is connected with the concentration controlling means who locates on the tail gas back flow line. According to the invention, a flow demand signal is generated according to the concentration of the fermentation raw material gas, the concentration of the fermentation tail gas and the target concentration, the fermentation tail gas is controlled to flow back to the fermentation raw material gas at the demand flow according to the flow demand signal until the concentration of the fermentation inlet gas reaches the target concentration, so that the stability of the concentration of CO in the fermentation inlet gas is ensured.

Description

System and method for controlling concentration of carbon monoxide in fermentation air inlet
Technical Field
The invention relates to a carbon monoxide concentration control system and method in fermentation air inlet, belonging to the technical field of gas concentration control.
Background
The invention discloses a technology for producing ethanol by taking industrial tail gas containing carbon monoxide as a raw material through a fermentation method (application number CN201710352273.6, a method and a system for producing the ethanol by adopting the industrial tail gas fermentation method), and the technology discloses a technology for producing the ethanol by taking the industrial tail gas containing the carbon monoxide as the raw material through fermentation.
The fermentation inlet gas is gas entering the fermentation tank for fermentation, and the CO concentration in the fermentation inlet gas is different due to different sources of the fermentation inlet gas, so that the CO concentration of the fermentation inlet gas is unstable, the stability of fermentation operation can be influenced, production fluctuation is caused, and the system is seriously and possibly stopped directly. Therefore, a new utilization way needs to be developed to ensure the stability of the concentration of CO in the fermentation inlet gas.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a system and a method for controlling the concentration of carbon monoxide in fermentation inlet gas, so as to solve the technical problem of unstable concentration of the carbon monoxide in the fermentation inlet gas in the prior art.
To achieve the above object, an embodiment of the present invention provides a carbon monoxide concentration control system in fermentation intake air, the system including: raw material air inlet pipeline, fermentation tank, tail gas reflux pipeline, control terminal and concentration control device;
a first detection port is arranged at the air inlet of the raw material air inlet pipeline, and the air outlet of the raw material air inlet pipeline is connected with the air inlet of the fermentation tank;
a second detection port is formed in the air inlet of the fermentation tank, and a third detection port is formed in the air outlet of the fermentation tank;
the gas outlet of the fermentation tank is connected with the gas inlet of the tail gas reflux pipeline, and the gas outlet of the tail gas reflux pipeline is arranged between the first detection port and the second detection port;
the first end of the control terminal is connected with the first detection port, the second detection port and the third detection port respectively, the second end of the control terminal is connected with the concentration control device, and the concentration control device is arranged on the tail gas return pipeline.
Preferably, the system further comprises: the device comprises an air inlet buffer tank, an air inlet compressor, a pretreatment device and a tail gas washing tower;
an air outlet of the raw material air inlet pipeline is connected with an air inlet of the air inlet buffer tank;
An air outlet of the air inlet buffer tank is connected with an air inlet of the air inlet compressor;
the air outlet of the air inlet compressor is connected with the air inlet of the pretreatment device;
the air outlet of the pretreatment device is connected with the air inlet of the fermentation tank;
the gas outlet of the fermentation tank is connected with the gas inlet of the tail gas washing tower;
and an air outlet of the tail gas washing tower is connected with an air inlet of the tail gas reflux pipeline.
Preferably, the exhaust gas recirculation line comprises: the air inlet of the first backflow pipeline is connected with the air outlet of the fermentation tank, and the air outlet of the first backflow pipeline is arranged between the first detection port and the air inlet buffer tank;
the concentration control device includes: a first tail gas flow meter and a tail gas flow regulating valve;
the first tail gas flowmeter is arranged on the first return line and is connected with the second end of the control terminal;
the tail gas flow regulating valve is arranged on the first return line and is connected with the first tail gas flowmeter.
Preferably, the exhaust gas recirculation line further comprises: the air inlet of the second backflow pipeline is arranged on the first backflow pipeline, and the air outlet of the second backflow pipeline is arranged between the pretreatment device and the second detection port;
The concentration control apparatus further includes: a second tail gas flow meter and a tail gas compressor;
the second tail gas flowmeter is arranged on the second return line and is connected with the second end of the control terminal;
and the tail gas compressor is arranged on the second return line and is connected with the second tail gas flowmeter.
Preferably, the system further comprises: a tail gas discharge line, a tail gas treatment device and a chimney;
the air inlet of the tail gas discharge pipeline is arranged on the first return pipeline;
the air outlet of the tail gas discharge pipeline is connected with the air inlet of the tail gas treatment device;
and an air outlet of the tail gas treatment device is connected with an air inlet of the chimney.
In addition, in order to achieve the above object, an embodiment of the present invention further provides a method for controlling a carbon monoxide concentration in a fermentation intake air, based on the above carbon monoxide concentration control system in the fermentation intake air, the method comprising the steps of:
the first detection port detects the first CO concentration and the initial flow of the fermentation raw material gas;
the second detection port detects the second CO concentration of the fermentation intake air;
fermenting the fermentation inlet gas by a fermentation tank and discharging fermentation tail gas;
a third detection port detects a third CO concentration of the fermentation tail gas;
The control terminal sets a preset target CO concentration, receives the initial flow, the first CO concentration and the third CO concentration, calculates a required flow according to the initial flow, the first CO concentration, the third CO concentration and the preset target CO concentration, and generates a flow demand signal according to the required flow;
and the concentration control device receives a flow demand signal sent by the control terminal, and controls the fermentation tail gas to flow back to the fermentation raw material gas at the demand flow according to the flow demand signal until the second CO concentration reaches the preset target CO concentration.
Preferably, before the fermentation tank ferments the fermentation intake air and discharges fermentation tail gas, the method further comprises:
the inlet buffer tank buffers the fermentation raw material gas;
the air inlet compressor pressurizes the buffered fermentation raw material gas;
the pretreatment device is used for pretreating the pressurized fermentation raw material gas;
after the fermentation tank ferments the fermentation inlet gas and discharges fermentation tail gas, the method further comprises:
and washing the fermentation tail gas by a tail gas washing tower.
Preferably, the controlling the fermentation tail gas to flow back to the fermentation raw material gas according to the flow demand signal includes:
The first tail gas flowmeter generates a first flow control signal according to the flow demand signal and sends the first flow control signal to the tail gas flow regulating valve;
and the tail gas flow regulating valve controls the fermentation tail gas to flow back to the fermentation raw material gas at the required flow according to the first flow control signal.
Preferably, the controlling the fermentation tail gas to flow back to the fermentation raw material gas according to the flow demand signal includes:
the second tail gas flowmeter generates a second flow control signal according to the flow demand signal and sends the second flow control signal to a tail gas compressor;
and the tail gas compressor pressurizes the fermentation tail gas, and controls the pressurized fermentation tail gas to flow back to the pretreated fermentation raw gas at the required flow rate according to the second flow rate control signal.
Preferably, after controlling the fermentation tail gas to flow back to the fermentation raw material gas at the required flow rate according to the flow rate demand signal, the method further comprises:
the tail gas treatment device is used for purifying the unreflected fermentation tail gas;
and the chimney discharges the purified fermentation tail gas.
Compared with the prior art, the preparation method provided by the invention has the following advantages:
in this embodiment, the control terminal calculates the required flow according to the initial flow of the fermentation raw material gas, the first CO concentration, the third CO concentration of the fermentation tail gas and the preset target CO concentration, and generates a flow demand signal according to the required flow, and the concentration control device controls the fermentation tail gas to flow back into the fermentation raw material gas with the required flow according to the flow demand signal until the second CO concentration of the fermentation inlet gas reaches the preset target CO concentration, thereby ensuring the stability of the CO concentration in the fermentation inlet gas, effectively influencing the fermentation operation by the fluctuation of the CO concentration of the raw material gas, and realizing the stable operation of the fermentation production.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a system for controlling the concentration of carbon monoxide in a fermentation feed gas according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of another embodiment of a system for controlling the concentration of carbon monoxide in a fermentation intake air according to the present invention;
FIG. 3 is a logic diagram of the automatic control of the carbon monoxide concentration control system in the fermentation feed of the present invention.
FIG. 4 is a schematic flow chart of an embodiment of a method for controlling the concentration of carbon monoxide in a fermentation gas.
Reference numerals illustrate:
reference numerals Name of the name Reference numerals Name of the name
1 Raw material air inlet pipeline 13 Pressure regulating valve of tail gas washing tower
2 Intake flowmeter 14 First tail gas flowmeter
3 First detection port 15 Tail gas flow regulating valve
4 Air inlet buffer tank 16 Second tail gas flowmeter
5 Air inlet compressor 17 Tail gas compressor
6 Pretreatment device 18 First return line
7 Fermentation air inlet pipeline 19 Second return line
8 Second detection port 20 Tail gas treatment device
9 Fermentation tank 21 Chimney
10 Tail gas washing tower 22 Control terminal
11 Tail gas reflux pipeline 23 Concentration control device
12 Third detection port 24 Tail gas discharge pipeline
Detailed Description
The advantages and various effects of the present invention will be more clearly apparent from the following detailed description and examples. It will be understood by those skilled in the art that these specific embodiments and examples are intended to illustrate the invention, not to limit the invention.
Throughout the specification, unless specifically indicated otherwise, the terms used herein should be understood as meaning as commonly used in the art. Accordingly, unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. In case of conflict, the present specification will control.
Unless otherwise specifically indicated, the various raw materials, reagents, instruments, equipment and the like used in the present invention are commercially available or may be prepared by existing methods.
Referring to FIG. 1, an embodiment of the present invention provides a carbon monoxide concentration control system in a fermentation feed gas, the system comprising: a raw material inlet line 1, a fermenter 9, a tail gas return line 11, a control terminal 22 and a concentration control device 23.
The solution idea of the embodiment is as follows: the CO concentration of the fermentation raw material gas is high and unstable, the fermentation raw material gas is fermented to generate fermentation tail gas with low CO concentration, the fermentation tail gas is returned to the fermentation raw material gas at a certain flow, the mixed gas of the fermentation tail gas and the fermentation raw material gas is used as fermentation inlet gas for fermentation, and after a period of time, the CO concentration in the fermentation inlet gas is gradually stabilized at a preset target CO concentration.
The gas inlet of raw materials air inlet line 1 department is equipped with first detection mouth 3, the gas outlet of raw materials air inlet line 1 with the air inlet of fermentation cylinder 9 is connected.
The detection port includes: the sampling port, the gas pipe and the CO analyzer are used for obtaining the sample gas through the sampling port, and the sample gas is conveyed to the CO analyzer through the gas pipe for detection, so that the CO concentration of the sample gas is obtained. Various sources of fermentation raw material gas enter from the raw material gas inlet pipeline 1, the first CO concentration of the fermentation raw material gas is detected at the first detection port 3, and the first detection port 3 can be provided with: and an air inlet flowmeter for detecting the initial flow of the fermentation raw material gas.
The gas inlet of the fermentation tank 9 is provided with a second detection port 8, and the gas outlet of the fermentation tank 9 is provided with a third detection port 12.
The fermentation inlet gas is gas entering the fermentation tank 9, the fermentation tail gas is gas flowing out of the fermentation tank 9 after fermentation, and a second detection port 8 is arranged at the gas inlet of the fermentation tank 9 to detect the second CO concentration of the fermentation inlet gas; and a third detection port 12 is arranged at the air outlet of the fermentation tank 9 and is used for detecting the third CO concentration of the fermentation tail gas.
The gas outlet of fermentation cylinder 9 with the air inlet of tail gas return line 11 is connected, the gas outlet of tail gas return line 11 is located between the first detection mouth 3 and the second detection mouth 8.
The fermentation tail gas continuously flows back to the fermentation raw material gas through the tail gas return pipeline 11, and is mixed with the fermentation raw material gas to obtain fermentation inlet gas, and the concentration of CO in the fermentation inlet gas gradually reaches the preset target concentration, so that the stability of the fermentation production process can be ensured.
The gas outlet of the tail gas reflux pipeline 11 is arranged between the first detection port 3 and the second detection port 8, so that the first detection port 3 detects the first CO concentration of the fermentation raw material gas, and the second detection port 8 detects the second CO concentration of the fermentation gas inlet.
The first end of the control terminal 22 is respectively connected with the first detection port 3, the second detection port 8 and the third detection port 12, the second end of the control terminal 22 is connected with the concentration control device 23, and the concentration control device 23 is arranged on the exhaust gas reflux pipeline 11.
Specifically, a first end of the control terminal 22 is connected to the first detection port 3 to receive the first CO concentration of the fermentation feedstock gas and the initial flow rate of the fermentation feedstock gas; a first end of the control terminal 22 is connected to the second detection port 8 to receive a second CO concentration of the fermentation intake air; the first end of the control terminal 22 is connected to the third detection port 12 for receiving a third CO concentration of the fermentation tail gas.
The control terminal 22 will calculate a required flow rate according to the initial flow rate, the first CO concentration, the third CO concentration, and a preset target CO concentration, where the required flow rate refers to: and mixing the fermentation raw material gas with the first CO concentration and the initial flow with the fermentation tail gas with the third CO concentration, wherein the flow of the fermentation tail gas is required under the condition that the CO concentration in the obtained mixed gas reaches the preset target CO concentration.
The control terminal 22 generates a flow demand signal according to the demand flow, and sends the flow demand signal to the concentration control device 23, so that the concentration control device 23 controls the fermentation tail gas to flow back to the fermentation raw material gas at the demand flow until the second CO concentration of the fermentation inlet gas reaches the preset target CO concentration, thereby ensuring the stability of the CO concentration in the fermentation inlet gas.
The concentration control system of the present embodiment includes: a raw material inlet line 1, a fermentation tank 9, a tail gas reflux line 11, a control terminal 22 and a concentration control device 23; a first detection port 3 is arranged at the air inlet of the raw material air inlet pipeline 1, and the air outlet of the raw material air inlet pipeline 1 is connected with the air inlet of the fermentation tank 9; a second detection port 8 is arranged at the air inlet of the fermentation tank 9, and a third detection port 12 is arranged at the air outlet of the fermentation tank 9; the gas outlet of the fermentation tank 9 is connected with the gas inlet of the tail gas reflux pipeline 11, and the gas outlet of the tail gas reflux pipeline 11 is arranged between the first detection port 3 and the second detection port 8; the first end of the control terminal 22 is respectively connected with the first detection port 3, the second detection port 8 and the third detection port 12, the second end of the control terminal 22 is connected with the concentration control device 23, and the concentration control device 23 is arranged on the exhaust gas reflux pipeline 11. The control terminal 22 of this embodiment calculates the required flow according to the initial flow of the fermentation raw material gas, the first CO concentration, the third CO concentration of the fermentation tail gas and the preset target CO concentration, and generates a flow demand signal according to the required flow, and the concentration control device 23 controls the fermentation tail gas to flow back into the fermentation raw material gas at the required flow according to the flow demand signal until the second CO concentration of the fermentation inlet gas reaches the preset target CO concentration, thereby ensuring the stability of the CO concentration in the fermentation inlet gas, effectively influencing the fermentation operation due to the fluctuation of the CO concentration of the raw material gas, and realizing the stable operation of the fermentation production.
Referring to fig. 2, an embodiment of the present invention provides a carbon monoxide concentration control system in a fermentation feed gas, the system further comprising: an air inlet buffer tank 4, an air inlet compressor 5, a pretreatment device 6 and an exhaust gas washing tower 10;
the air outlet of the raw material air inlet pipeline 1 is connected with the air inlet of the air inlet buffer tank 4;
the air outlet of the air inlet buffer tank 4 is connected with the air inlet of the air inlet compressor 5;
the air outlet of the air inlet compressor 5 is connected with the air inlet of the pretreatment device 6;
the air outlet of the pretreatment device 6 is connected with the air inlet of the fermentation tank 9;
the gas outlet of the fermentation tank 9 is connected with the gas inlet of the tail gas washing tower 10;
the gas outlet of the tail gas washing tower 10 is connected with the gas inlet of the tail gas reflux pipeline 11.
Before entering the fermentation tank 9 for fermentation, the fermentation raw material gas is sequentially buffered, compressed and pretreated, specifically, the fermentation raw material gas is buffered through the air inlet buffer tank 4, so that the flow unevenness of a suction pipeline is reduced; pressurizing the buffered fermentation raw material gas through the air inlet compressor 5 to provide power for the system, wherein the air inlet compressor 5 is a centrifugal compressor or a reciprocating compressor; the pressurized fermentation raw material gas is pretreated by the pretreatment device 6, so that the fermentation raw material gas is purified, and finally, the fermentation inlet gas is obtained. Still be equipped with between preprocessing device 6 and the fermentation cylinder 9: a fermentation intake line 7, through which fermentation intake line 7 the fermentation intake enters the fermenter 9.
After the fermentation tank 9 ferments the fermentation intake air and discharges fermentation tail gas, the fermentation tail gas is further washed by the tail gas washing tower 10, so as to remove impurities such as dust in the fermentation tail gas, wherein the tail gas washing tower 10 consists of a tower body, a tower plate, a reboiler and a condenser.
Further, the first detecting port 3 may further be provided with: an inlet flow meter 2 for detecting an initial flow rate of the fermentation feedstock gas.
Further, the exhaust gas recirculation line 11 includes: the air inlet of the first reflux pipeline 18 is connected with the air outlet of the fermentation tank 9, and the air outlet of the first reflux pipeline 18 is arranged between the first detection port 3 and the air inlet buffer tank 4; the system further comprises: an exhaust gas scrubber pressure regulating valve 13, said exhaust gas scrubber pressure regulating valve 13 being arranged on said first return line 18;
the concentration control device 23 includes: a first exhaust flow meter 14 and an exhaust flow regulating valve 15;
the first tail gas flow meter 14 is disposed on the first return line 18 and connected to the second end of the control terminal 22;
the exhaust gas flow rate regulating valve 15 is disposed on the first return line 18 and connected to the first exhaust gas flow meter 14.
In this embodiment, the fermentation tail gas may flow back to the fermentation raw gas through two ways, wherein the first way is that the fermentation tail gas flows back to the space between the first detection port 3 and the air intake buffer tank 4 through the first backflow pipeline 18, and after being mixed with the fermentation raw gas, the fermentation tail gas sequentially passes through the air intake buffer tank 4, the air intake compressor 5 and the pretreatment device 6, so as to obtain fermentation air intake. After fermentation, the control terminal 22 will calculate a demand flow according to the initial flow, the first CO concentration, the third CO concentration and a preset target CO concentration, generate a flow demand signal according to the demand flow, and send the flow demand signal to the first tail gas flowmeter 14, and the first tail gas flowmeter 14 will generate a first flow control signal according to the flow demand signal, and send the first flow control signal to the tail gas flow regulating valve 15 to control the opening of the tail gas flow regulating valve 15, thereby controlling the fermentation tail gas to flow back into the fermentation raw gas at the demand flow to regulate the CO concentration of the fermentation intake air. The control terminal 22 is further connected to the second detection port 8 to obtain the second CO concentration of the fermentation intake air, and monitor the second CO concentration until the second CO concentration reaches the preset target CO concentration, thereby ensuring the stability of the CO concentration in the fermentation intake air.
Further, the exhaust gas recirculation line 11 further includes: a second backflow pipeline 19, wherein an air inlet of the second backflow pipeline 19 is arranged on the first backflow pipeline 18, and an air outlet of the second backflow pipeline 19 is arranged between the pretreatment device 6 and the second detection port 8;
the concentration control apparatus 23 further includes: a second tail gas flow meter 16 and a tail gas compressor 17;
the second tail gas flow meter 16 is arranged on the second return line 19 and is connected with the second end of the control terminal 22;
the exhaust gas compressor 17 is disposed on the second return line 19 and connected to the second exhaust gas flow meter 16, and the exhaust gas compressor 17 is a screw compressor or a reciprocating compressor.
The second way is that the returned fermentation tail gas is pressurized by the tail gas compressor 17 through the second return line 19 between the pretreatment device 6 and the second detection port 8, the control terminal 22 calculates a required flow according to the initial flow, the first CO concentration, the third CO concentration and a preset target CO concentration, generates a flow demand signal according to the required flow and sends the flow demand signal to the second tail gas flowmeter 16, and the second tail gas flowmeter 16 generates a second flow control signal according to the flow demand signal and sends the second flow control signal to the tail gas compressor 17 to control the opening degree of the tail gas compressor 17, so as to control the fermentation tail gas to flow back to the pretreated fermentation raw gas at the required flow to adjust the CO concentration of the fermentation inlet gas. The control terminal 22 is further connected to the second detection port 8 to obtain the second CO concentration of the fermentation intake air, and monitor the second CO concentration until the second CO concentration reaches the preset target CO concentration, thereby ensuring the stability of the CO concentration in the fermentation intake air.
Referring to fig. 3, fig. 3 is an automatic control logic diagram of a carbon monoxide concentration control system in a fermentation intake air according to the present invention, wherein a is a preset target CO concentration, a is a concentration signal corresponding to a second CO concentration, b is a flow signal corresponding to an initial flow rate, c is a concentration signal corresponding to a first CO concentration, d is a concentration signal corresponding to a third CO concentration, e is a flow demand signal, and f is a flow control signal. The control terminal 22 receives the signals b, c and d, calculates the required flow rate in combination with the signal a, generates a signal e according to the required flow rate, and sends the signal e to the first tail gas flow meter 14 or the second tail gas flow meter 16, so that the first tail gas flow meter 14 or the second tail gas flow meter 16 generates a signal f, and controls the corresponding tail gas flow regulating valve 15 or the tail gas compressor 17 to perform flow control according to the signal f.
Further, the system further comprises: an exhaust gas discharge line 24, an exhaust gas treatment device 20 and a stack 21;
the air inlet of the exhaust gas discharge line 24 is arranged on the first return line 18;
the air outlet of the exhaust gas discharge pipeline 24 is connected with the air inlet of the exhaust gas treatment device 20;
the air outlet of the tail gas treatment device 20 is connected with the air inlet of the chimney 21.
It will be appreciated that after the fermentation tail gas is refluxed at the required flow rate, the unreturned fermentation tail gas is discharged, and in order to reduce the emission pollution, the unreturned fermentation tail gas is purified by the tail gas treatment device 20, and the purified fermentation tail gas is discharged by the chimney 21.
In this embodiment, the fermentation tail gas is returned to the fermentation inlet through the first return line 18 and the second return line 19, so that the concentration of CO in the fermentation inlet can be gradually adjusted to the preset target concentration of CO, the stability of the concentration of CO in the fermentation inlet is ensured, and the stability of the fermentation process is further improved.
Referring to fig. 4, an embodiment of the present invention provides a method for controlling a carbon monoxide concentration in a fermentation intake air, based on the above-mentioned control system for a carbon monoxide concentration in a fermentation intake air, the system includes: raw material air inlet line, fermentation cylinder, tail gas return line, control terminal and concentration controlling means, the method includes:
step S10: the first detection port detects the first CO concentration and the initial flow of the fermentation raw material gas;
the solution idea of the embodiment is as follows: the CO concentration of the fermentation raw material gas is high and unstable, the fermentation raw material gas is fermented to generate fermentation tail gas with low CO concentration, the fermentation tail gas is returned to the fermentation raw material gas at a certain flow, the mixed gas of the fermentation tail gas and the fermentation raw material gas is used as fermentation inlet gas for fermentation, and after a period of time, the CO concentration in the fermentation inlet gas is gradually stabilized at a preset target CO concentration.
The gas inlet of raw materials air inlet line department is equipped with first detection mouth, the gas outlet of raw materials air inlet line with the air inlet of fermentation cylinder is connected.
Various sources of fermentation feed gas enter from the feed gas inlet line, the first CO concentration of the fermentation feed gas is detected at the first detection port, and the first detection port can be further provided with: and an air inlet flowmeter for detecting the initial flow of the fermentation raw material gas.
Step S20: the second detection port detects the second CO concentration of the fermentation intake air;
step S30: fermenting the fermentation inlet gas by a fermentation tank and discharging fermentation tail gas;
step S40: a third detection port detects a third CO concentration of the fermentation tail gas;
the gas inlet of the fermentation tank is provided with a second detection port, and the gas outlet of the fermentation tank is provided with a third detection port.
The fermentation inlet gas is gas entering the fermentation tank, the fermentation tail gas is gas flowing out of the fermentation tank after fermentation, and a second detection port is arranged at the gas inlet of the fermentation tank to detect the second CO concentration of the fermentation inlet gas; and a third detection port is arranged at the air outlet of the fermentation tank, and the third CO concentration of the fermentation tail gas is detected.
The gas outlet of the fermentation tank is connected with the gas inlet of the tail gas reflux pipeline, and the gas outlet of the tail gas reflux pipeline is arranged between the first detection port and the second detection port.
The fermentation tail gas continuously flows back to the fermentation raw material gas through the tail gas return pipeline and is mixed with the fermentation raw material gas to obtain fermentation inlet gas, and the concentration of CO in the fermentation inlet gas gradually reaches a preset target concentration, so that the stability of a fermentation production process can be ensured.
And an air outlet of the tail gas reflux pipeline is arranged between the first detection port and the second detection port, so that the first detection port detects the first CO concentration of the fermentation raw material gas, and the second detection port detects the second CO concentration of the fermentation air inlet.
Step S50: the control terminal sets a preset target CO concentration, receives the initial flow, the first CO concentration and the third CO concentration, calculates a required flow according to the initial flow, the first CO concentration, the third CO concentration and the preset target CO concentration, and generates a flow demand signal according to the required flow;
the first end of the control terminal is connected with the first detection port, the second detection port and the third detection port respectively, the second end of the control terminal is connected with the concentration control device, and the concentration control device is arranged on the tail gas return pipeline.
Specifically, a first end of the control terminal is connected with the first detection port so as to receive the first CO concentration of the fermentation raw material gas and the initial flow rate of the fermentation raw material gas; the first end of the control terminal is connected with the second detection port so as to receive the second CO concentration of the fermentation inlet gas; the first end of the control terminal is connected with the third detection port so as to receive the third CO concentration of the fermentation tail gas.
The control terminal calculates a required flow according to the initial flow, the first CO concentration, the third CO concentration and a preset target CO concentration, wherein the required flow refers to: and mixing the fermentation raw material gas with the first CO concentration and the initial flow with the fermentation tail gas with the third CO concentration, wherein the flow of the fermentation tail gas is required under the condition that the CO concentration in the obtained mixed gas reaches the preset target CO concentration.
Step S60: and the concentration control device receives a flow demand signal sent by the control terminal, and controls the fermentation tail gas to flow back to the fermentation raw material gas at the demand flow according to the flow demand signal until the second CO concentration reaches the preset target CO concentration.
The control terminal generates a flow demand signal according to the demand flow and sends the flow demand signal to the concentration control device, so that the concentration control device controls the fermentation tail gas to flow back to the fermentation raw material gas at the demand flow until the second CO concentration of the fermentation inlet gas reaches the preset target CO concentration, and the stability of the CO concentration in the fermentation inlet gas is ensured.
The control terminal of the embodiment calculates the required flow according to the initial flow of the fermentation raw material gas, the first CO concentration, the third CO concentration of the fermentation tail gas and the preset target CO concentration, generates a flow demand signal according to the required flow, and controls the fermentation tail gas to flow back to the fermentation raw material gas at the required flow according to the flow demand signal by the concentration control device until the second CO concentration of the fermentation inlet gas reaches the preset target CO concentration, so that the stability of the CO concentration in the fermentation inlet gas is ensured, the influence of the CO concentration fluctuation of the raw material gas on the fermentation operation is effectively realized, and the stable operation of the fermentation production is realized.
Further, an embodiment of the present invention provides a method for controlling a concentration of carbon monoxide in a fermentation intake air, before the step S30, the method further includes:
the inlet buffer tank buffers the fermentation raw material gas;
the air inlet compressor pressurizes the buffered fermentation raw material gas;
the pretreatment device is used for pretreating the pressurized fermentation raw material gas;
after the step S30, the method further includes:
and washing the fermentation tail gas by a tail gas washing tower.
The system further comprises: the device comprises an air inlet buffer tank, an air inlet compressor, a pretreatment device and a tail gas washing tower, wherein an air outlet of a raw material air inlet pipeline is connected with an air inlet of the air inlet buffer tank; an air outlet of the air inlet buffer tank is connected with an air inlet of the air inlet compressor; the air outlet of the air inlet compressor is connected with the air inlet of the pretreatment device; the air outlet of the pretreatment device is connected with the air inlet of the fermentation tank; the gas outlet of the fermentation tank is connected with the gas inlet of the tail gas washing tower; and an air outlet of the tail gas washing tower is connected with an air inlet of the tail gas reflux pipeline. Before entering a fermentation tank for fermentation, the fermentation raw material gas is sequentially buffered, compressed and pretreated, specifically, the fermentation raw material gas is buffered through the air inlet buffer tank, so that the flow non-uniformity of a suction pipeline is reduced; pressurizing the buffered fermentation raw material gas through the air inlet compressor, and providing power for the system, wherein the air inlet compressor is a centrifugal compressor or a reciprocating compressor; and the pressurized fermentation raw material gas is pretreated by the pretreatment device, so that the fermentation raw material gas is purified, and finally, the fermentation inlet gas is obtained. Still be equipped with between preprocessing device with the fermentation cylinder: and the fermentation air inlet pipeline is used for allowing the fermentation air to enter the fermentation tank.
After the fermentation tank ferments the fermentation air and discharges fermentation tail gas, the fermentation tail gas is washed by the tail gas washing tower to remove impurities such as dust in the fermentation tail gas, and the tail gas washing tower consists of a tower body, a tower plate, a reboiler and a condenser.
Further, the step S60 specifically includes:
the first tail gas flowmeter generates a first flow control signal according to the flow demand signal and sends the first flow control signal to the tail gas flow regulating valve;
and the tail gas flow regulating valve controls the fermentation tail gas to flow back to the fermentation raw material gas at the required flow according to the first flow control signal.
The exhaust gas recirculation line includes: the air inlet of the first backflow pipeline is connected with the air outlet of the fermentation tank, and the air outlet of the first backflow pipeline is arranged between the first detection port and the air inlet buffer tank; the system further comprises: the tail gas washing tower pressure regulating valve is arranged on the first return line; the concentration control device includes: a first tail gas flow meter and a tail gas flow regulating valve; the first tail gas flowmeter is arranged on the first return line and is connected with the second end of the control terminal; the tail gas flow regulating valve is arranged on the first return line and is connected with the first tail gas flowmeter.
In this embodiment, the fermentation tail gas may flow back to the fermentation raw gas through two ways, where the first way is that the fermentation tail gas flows back to the space between the first detection port and the air intake buffer tank through the first backflow pipeline, and after the returned fermentation tail gas is mixed with the fermentation raw gas, the fermentation air intake is obtained through the air intake buffer tank, the air intake compressor and the pretreatment device in sequence. After fermentation, the control terminal calculates a required flow according to the initial flow, the first CO concentration, the third CO concentration and a preset target CO concentration, generates a flow demand signal according to the required flow, and sends the flow demand signal to a first tail gas flowmeter, and the first tail gas flowmeter generates a first flow control signal according to the flow demand signal and sends the first flow control signal to a tail gas flow regulating valve to control the opening degree of the tail gas flow regulating valve, so that the fermentation tail gas is controlled to flow back to the fermentation raw gas at the required flow to regulate the CO concentration of fermentation inlet gas. And the control terminal is connected with the second detection port, so that the second CO concentration of the fermentation air inlet is obtained, and the second CO concentration is monitored until the second CO concentration reaches the preset target CO concentration, and the stability of the CO concentration in the fermentation air inlet is ensured.
Further, the step S60 specifically includes:
the second tail gas flowmeter generates a second flow control signal according to the flow demand signal and sends the second flow control signal to a tail gas compressor;
and the tail gas compressor pressurizes the fermentation tail gas, and controls the pressurized fermentation tail gas to flow back to the pretreated fermentation raw gas at the required flow rate according to the second flow rate control signal.
The exhaust gas recirculation line further comprises: the air inlet of the second backflow pipeline is arranged on the first backflow pipeline, and the air outlet of the second backflow pipeline is arranged between the pretreatment device and the second detection port;
the concentration control apparatus further includes: a second tail gas flow meter and a tail gas compressor;
the second tail gas flowmeter is arranged on the second return line and is connected with the second end of the control terminal;
the tail gas compressor is arranged on the second return line and connected with the second tail gas flow meter, and the tail gas compressor is a screw compressor or a reciprocating compressor.
The second way is that the returned fermentation tail gas is pressurized through a tail gas compressor through the second return pipeline flowing back between the pretreatment device and the second detection port, the control terminal calculates the required flow according to the initial flow, the first CO concentration, the third CO concentration and the preset target CO concentration, generates a flow demand signal according to the required flow and sends the flow demand signal to a second tail gas flowmeter, and the second tail gas flowmeter generates a second flow control signal according to the flow demand signal and sends the second flow control signal to the tail gas compressor so as to control the opening degree of the tail gas compressor, thereby controlling the fermentation tail gas to flow back to the pretreated fermentation raw gas with the required flow so as to adjust the CO concentration of fermentation air intake. And the control terminal is connected with the second detection port, so that the second CO concentration of the fermentation air inlet is obtained, and the second CO concentration is monitored until the second CO concentration reaches the preset target CO concentration, and the stability of the CO concentration in the fermentation air inlet is ensured.
Referring to fig. 3, fig. 3 is an automatic control logic diagram of a carbon monoxide concentration control system in a fermentation intake air according to the present invention, wherein a is a preset target CO concentration, a is a concentration signal corresponding to a second CO concentration, b is a flow signal corresponding to an initial flow rate, c is a concentration signal corresponding to a first CO concentration, d is a concentration signal corresponding to a third CO concentration, e is a flow demand signal, and f is a flow control signal. The control terminal receives signals b, c and d, calculates the required flow by combining with the signal A, generates a signal e according to the required flow, and sends the signal e to the first tail gas flowmeter or the second tail gas flowmeter so that the first tail gas flowmeter or the second tail gas flowmeter generates a signal f, and controls a corresponding tail gas flow regulating valve or a tail gas compressor to control the flow according to the signal f.
Further, after the step S60, the method further includes:
the tail gas treatment device is used for purifying the unreflected fermentation tail gas;
and the chimney discharges the purified fermentation tail gas.
The system further comprises: a tail gas discharge line, a tail gas treatment device and a chimney; the air inlet of the tail gas discharge pipeline is arranged on the first return pipeline; the air outlet of the tail gas discharge pipeline is connected with the air inlet of the tail gas treatment device; and an air outlet of the tail gas treatment device is connected with an air inlet of the chimney.
It is understood that after the fermentation tail gas flows back at the required flow, the unreflected fermentation tail gas is discharged, and in order to reduce the emission pollution, the unreflected fermentation tail gas is purified by the tail gas treatment device, and the purified fermentation tail gas is discharged by a chimney.
In this embodiment, the fermentation tail gas is refluxed into the fermentation inlet gas through the first reflux pipeline and the second reflux pipeline, so that the concentration of CO in the fermentation inlet gas can be gradually adjusted to the preset target concentration of CO, the stability of the concentration of CO in the fermentation inlet gas is ensured, and the stability of the fermentation process is further improved.
The present invention will be described in further detail with reference to the following examples for a clearer understanding of the objects, technical solutions and advantages of the present invention. The specific data set forth in the specific examples described herein are for purposes of illustration only and are not intended to be limiting.
Example 1
Detecting the first CO concentration of the fermentation raw material gas to be 60 percent (c), and initiallyThe initial flow rate is 20000Nm 3 And (b) pressurizing to 500kpa by an air inlet compressor, purifying by a pretreatment device, and then entering a fermentation tank, wherein the third CO concentration of the fermentation tail gas after washing by a washing tower is 15% (d). Setting the target CO concentration as 58% (A), and automatically calculating the required flow as 930Nm according to signals b, c, d and A by the control terminal 3 And (h (e)) and feeding back the signal (e) to the first tail gas flowmeter, wherein the first tail gas flowmeter feeds back the signal (f) to the tail gas flow regulating valve, and the tail gas flow regulating valve automatically regulates the gas flow to a target value. And (3) continuously approaching the target CO concentration along with the second CO concentration detection signal (a), automatically feeding back and adjusting the tail gas flow by a program, and finally enabling the second CO concentration (a) of the fermentation inlet gas to reach or approach the target CO concentration (A).
Example 2
Detecting that the first CO concentration of the fermentation raw material gas is 55% (c), and the initial flow is 30000Nm 3 And (b) pressurizing to 600kpa by an air inlet compressor, purifying by a pretreatment device, and then entering a fermentation tank, wherein the third CO concentration of the fermentation tail gas after washing by a washing tower is 12% (d). Setting target CO concentration 50% (A), and automatically calculating the required flow 2631Nm according to signals b, c, d and A by a control terminal 3 And (h (e)) and feeding back the signal (e) to a second tail gas flowmeter, and feeding back the signal (f) to a tail gas compressor, wherein the tail gas compressor automatically adjusts the air quantity to a target value in a variable frequency manner. And (3) continuously approaching the target CO concentration along with the second CO concentration detection signal (a), automatically feeding back and adjusting the tail gas flow by a program, and finally enabling the second CO concentration (a) of the fermentation inlet gas to reach or approach the target CO concentration (A).
Finally, it is also noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. It is therefore intended that the following claims be interpreted as including the preferred embodiments and all such alterations and modifications as fall within the scope of the invention.
It will be apparent to those skilled in the art that various modifications and variations can be made to the present invention without departing from the spirit or scope of the invention. Thus, it is intended that the present invention also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.

Claims (4)

1. A system for controlling the concentration of carbon monoxide in a fermentation feed gas, the system comprising: raw material air inlet pipeline, fermentation tank, tail gas reflux pipeline, control terminal and concentration control device;
A first detection port is arranged at the air inlet of the raw material air inlet pipeline, and the air outlet of the raw material air inlet pipeline is connected with the air inlet of the fermentation tank;
a second detection port is formed in the air inlet of the fermentation tank, and a third detection port is formed in the air outlet of the fermentation tank;
the gas outlet of the fermentation tank is connected with the gas inlet of the tail gas reflux pipeline, and the gas outlet of the tail gas reflux pipeline is arranged between the first detection port and the second detection port;
the first end of the control terminal is connected with the first detection port, the second detection port and the third detection port respectively, the second end of the control terminal is connected with the concentration control device, and the concentration control device is arranged on the tail gas return pipeline;
the system further comprises: the device comprises an air inlet buffer tank, an air inlet compressor, a pretreatment device and a tail gas washing tower; an air outlet of the raw material air inlet pipeline is connected with an air inlet of the air inlet buffer tank; an air outlet of the air inlet buffer tank is connected with an air inlet of the air inlet compressor; the air outlet of the air inlet compressor is connected with the air inlet of the pretreatment device; the air outlet of the pretreatment device is connected with the air inlet of the fermentation tank; the gas outlet of the fermentation tank is connected with the gas inlet of the tail gas washing tower; the air outlet of the tail gas washing tower is connected with the air inlet of the tail gas reflux pipeline;
The exhaust gas recirculation line includes: the air inlet of the first backflow pipeline is connected with the air outlet of the fermentation tank, and the air outlet of the first backflow pipeline is arranged between the first detection port and the air inlet buffer tank; the concentration control device includes: a first tail gas flow meter and a tail gas flow regulating valve; the first tail gas flowmeter is arranged on the first return line and is connected with the second end of the control terminal; the tail gas flow regulating valve is arranged on the first return line and is connected with the first tail gas flowmeter;
the exhaust gas recirculation line further comprises: the air inlet of the second backflow pipeline is arranged on the first backflow pipeline, and the air outlet of the second backflow pipeline is arranged between the pretreatment device and the second detection port; the concentration control apparatus further includes: a second tail gas flow meter and a tail gas compressor; the second tail gas flowmeter is arranged on the second return line and is connected with the second end of the control terminal; and the tail gas compressor is arranged on the second return line and is connected with the second tail gas flowmeter.
2. The system of claim 1, wherein the system further comprises: a tail gas discharge line, a tail gas treatment device and a chimney;
the air inlet of the tail gas discharge pipeline is arranged on the first return pipeline;
the air outlet of the tail gas discharge pipeline is connected with the air inlet of the tail gas treatment device;
and an air outlet of the tail gas treatment device is connected with an air inlet of the chimney.
3. A method for controlling the concentration of carbon monoxide in a fermentation feed gas, characterized in that the method comprises the steps of:
the first detection port detects the first CO concentration and the initial flow of the fermentation raw material gas;
the second detection port detects the second CO concentration of the fermentation intake air;
fermenting the fermentation inlet gas by a fermentation tank and discharging fermentation tail gas;
a third detection port detects a third CO concentration of the fermentation tail gas;
the control terminal sets a preset target CO concentration, receives the initial flow, the first CO concentration and the third CO concentration, calculates a required flow according to the initial flow, the first CO concentration, the third CO concentration and the preset target CO concentration, and generates a flow demand signal according to the required flow;
The concentration control device receives a flow demand signal sent by the control terminal and controls the fermentation tail gas to flow back to the fermentation raw material gas at the demand flow according to the flow demand signal until the second CO concentration reaches the preset target CO concentration;
the fermentation tank ferments the fermentation inlet gas and discharges fermentation tail gas, and the method further comprises: the inlet buffer tank buffers the fermentation raw material gas; the air inlet compressor pressurizes the buffered fermentation raw material gas; the pretreatment device is used for pretreating the pressurized fermentation raw material gas; after the fermentation tank ferments the fermentation inlet gas and discharges fermentation tail gas, the method further comprises: the tail gas washing tower washes the fermentation tail gas;
the method for controlling the fermentation tail gas to flow back to the fermentation raw material gas according to the flow demand signal comprises the following steps: the first tail gas flowmeter generates a first flow control signal according to the flow demand signal and sends the first flow control signal to the tail gas flow regulating valve; the tail gas flow regulating valve controls the fermentation tail gas to flow back to the fermentation raw material gas at the required flow according to the first flow control signal;
The method for controlling the fermentation tail gas to flow back to the fermentation raw material gas according to the flow demand signal comprises the following steps: the second tail gas flowmeter generates a second flow control signal according to the flow demand signal and sends the second flow control signal to a tail gas compressor; and the tail gas compressor pressurizes the fermentation tail gas, and controls the pressurized fermentation tail gas to flow back to the pretreated fermentation raw gas at the required flow rate according to the second flow rate control signal.
4. The method of claim 3, wherein after controlling the fermentation tail gas to flow back into the fermentation feed gas at the desired flow rate in accordance with the flow demand signal, the method further comprises:
the tail gas treatment device is used for purifying the unreflected fermentation tail gas;
and the chimney discharges the purified fermentation tail gas.
CN201911069235.5A 2019-11-05 2019-11-05 System and method for controlling concentration of carbon monoxide in fermentation air inlet Active CN110777066B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201911069235.5A CN110777066B (en) 2019-11-05 2019-11-05 System and method for controlling concentration of carbon monoxide in fermentation air inlet

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201911069235.5A CN110777066B (en) 2019-11-05 2019-11-05 System and method for controlling concentration of carbon monoxide in fermentation air inlet

Publications (2)

Publication Number Publication Date
CN110777066A CN110777066A (en) 2020-02-11
CN110777066B true CN110777066B (en) 2023-05-09

Family

ID=69388901

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201911069235.5A Active CN110777066B (en) 2019-11-05 2019-11-05 System and method for controlling concentration of carbon monoxide in fermentation air inlet

Country Status (1)

Country Link
CN (1) CN110777066B (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111258345B (en) * 2020-02-25 2021-01-15 北京首钢朗泽新能源科技有限公司 Gas concentration stabilizing device and control method thereof
CN112755743A (en) * 2021-01-11 2021-05-07 宁夏首朗吉元新能源科技有限公司 Tail gas recovery equipment and method for ferroalloy industrial tail gas fermentation
CN113773953A (en) * 2021-09-16 2021-12-10 宁夏首朗吉元新能源科技有限公司 Fermentation tail gas cyclic utilization device

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3752177T2 (en) * 1986-12-25 1998-07-02 Takeda Chemical Industries Ltd Device for cultivating microorganisms
JP2012147682A (en) * 2011-01-17 2012-08-09 Daicel Corp Method and apparatus for producing organic substance from gas resource
US8936927B2 (en) * 2011-09-23 2015-01-20 Coskata, Inc. Processes for starting up deep tank anaerobic fermentation reactors for making oxygenated organic compound from carbon monoxide and hydrogen
CN104906993B (en) * 2015-05-25 2017-03-15 北京扬德环境科技股份有限公司 A kind of automatic mixing device of methane gas and mixing method
EP3775242A1 (en) * 2018-03-30 2021-02-17 INVISTA Textiles (U.K.) Limited High hydrogen utilization and gas recycle

Also Published As

Publication number Publication date
CN110777066A (en) 2020-02-11

Similar Documents

Publication Publication Date Title
CN110777066B (en) System and method for controlling concentration of carbon monoxide in fermentation air inlet
CN107572482B (en) A kind of self elevation adaption oxygen generation system and method for producing oxygen through
CN108191052B (en) Intelligent carbon source adding system and application thereof in sewage treatment
CN103502903A (en) Dynamic gas blending
CN113062874A (en) Automatic control system for slurry amount of wet desulphurization slurry circulating pump
CN116099326A (en) Adsorbent management method based on hydrogen production purification and electronic equipment
CN113093820B (en) Gas concentration stabilizing device and control method thereof
CN112875830A (en) Automatic control method and system for pH value of inlet of secondary reverse osmosis system
CN110203895A (en) A kind of the circulatory purification system and circulatory purification method of helium
CN205823699U (en) Oxygen-enriched air blast system before blast furnace blower machine
CN203835687U (en) Material buffer system
CN214174904U (en) Intelligent aeration quantity calculation control system for sewage treatment
CN204437711U (en) A kind of fecder system network air inlet detecting and controlling system of methane station
CN108508162A (en) A kind of circulating air automatic detection discharge and live gas replenishment system
CN210427096U (en) Two-phase flow system sampling and recovering device
CN211098447U (en) Intelligent automatic hydrogen-nitrogen proportioning device
CN107632099A (en) A kind of intelligent online continuous sampling automatic analysis system and method
CN208313933U (en) A kind of circulating air automatic detection discharge and live gas replenishment system
CN113941257A (en) System and method for detecting oxygen utilization efficiency of MABR (moving active biofilm reactor) process
CN2861162Y (en) Flow process apparatus for liquid asphalt batching system
CN111505188A (en) Volatile organic compounds VOCs multichannel on-line monitoring system
CN110898650A (en) Slaked lime slurry concentration on-line monitoring and regulating system
JPH07171592A (en) Automatic control device for inflow amount of raw water to anaerobic waste water treatment equipment
CN108548423A (en) A kind of ITO target sintering furnace using system with circulating oxygen
CN114249415B (en) Accurate aeration device and method

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
CB02 Change of applicant information

Address after: Room 1601-6, 16th floor, building 1, yard 1, tianshunzhuang North Road, Shijingshan District, Beijing 100043

Applicant after: Beijing Shougang langze Technology Co.,Ltd.

Address before: 100043 room 1601-6, building 1, yard 1, tianshunzhuang North Road, Shijingshan District, Beijing

Applicant before: BEIJING SHOUGANG LANGZE NEW ENERGY TECHNOLOGY CO.,LTD.

CB02 Change of applicant information
GR01 Patent grant
GR01 Patent grant