Anaerobic fermentation reactor convenient for gas component detection

Abstract

The anaerobic fermentation reactor comprises a tank body, the tank body comprises a detection hole, a constant-temperature chamber is installed in the detection hole, a temperature sensor is arranged in the constant-temperature chamber, a chromatographic column is fixedly installed in the constant-temperature chamber, a gas carrying tank is arranged on the outer side of the tank body, and a six-way sample injector is fixedly installed in the constant-temperature chamber. The six-way sample injector is communicated with the chromatographic column and the exhaust end of the gas carrying tank, an injector and a driving push rod are fixedly installed in the constant temperature chamber, a detector is arranged on the outer side of the tank body, the detector is communicated with the chromatographic column, the detector is communicated with a gas tank and a combustion-supporting tank, and the gas tank and the combustion-supporting tank are arranged on the outer side of the tank body. According to the present invention, the six-way sample injector and the chromatographic column are arranged inside the tank body, such that the sample transfer gas path is reduced, and the capacity of the injector is not less than the two times of the quantitative loop of the six-way sample injector so as to wash the previous residue by the first half sample when the sample is pushed into the injector so as to reduce the influence of the residue sample on the detection result.

Description

Technical Field

[0001] The invention belongs to the technical field of anaerobic fermentation tanks and relates to an anaerobic fermentation reactor which is convenient for detecting gas components. Background Art

[0002] Anaerobic fermentation tank is a closed fermentation tank container used for fermentation in an oxygen-free or low-oxygen environment. Anaerobic fermentation tanks are mainly used in sewage treatment and the production of solvents such as alcohol. During the anaerobic fermentation process, it is necessary to observe the temperature, air pressure, pH value, etc. in the fermentation tank in real time, and it is also necessary to detect and analyze the gas generated during the fermentation process in order to understand the specific situation of the fermentation process.

[0003] A multi-channel anaerobic fermentation greenhouse gas fully automatic online detection method and device is disclosed in the patent document with publication number CN103954606A. A method for analyzing the gas in the fermentation tank by connecting the fermentation tank to a gas chromatograph is disclosed. The gas in the fermentation tank is input into the chromatograph through a conduit to realize fully automatic online detection of the gas in the fermentation tank. However, real-time detection is not possible, and the amount of sample required by the chromatograph is relatively small. The residual sample in the conduit may affect the next detection. Summary of the invention

[0004] In view of the above problems, the present invention proposes an anaerobic fermentation reactor which is convenient for gas component detection, and well solves the problems in the prior art.

[0005] In order to achieve the above object, the technical solution adopted by the present invention is as follows:

[0006] An anaerobic fermentation reactor for facilitating gas component detection, comprising:

[0007] A tank body, the tank body comprising a feed port, a discharge port, an exhaust port and a detection hole;

[0008] A stirring member, the stirring member is installed in the middle of the tank body;

[0009] Sensors, including a temperature sensor, an air pressure sensor and a PH sensor, and the sensors are installed in the tank;

[0010] A constant temperature chamber, the constant temperature chamber is installed in the detection hole, the outer edge of the constant temperature chamber is sealed and connected to the tank body, the temperature sensor is arranged in the constant temperature chamber, and the constant temperature chamber includes a temperature controller;

[0011] A chromatographic column, wherein the chromatographic column is fixedly installed in the constant temperature chamber;

[0012] A gas carrier tank, the exhaust end of which is connected to the constant temperature chamber, and the gas carrier tank is provided with an electric control valve;

[0013] A six-way injector, the six-way injector is connected to the chromatographic column and the exhaust end of the carrier gas tank;

[0014] An injector, the injector is in the shape of a syringe, the injector is provided with an air inlet and an injection port, the air inlet passes through the constant temperature chamber and is connected to the tank body, the injection port is connected to the air inlet end of the six-way injector, and the air inlet and the injection port are both provided with a one-way valve;

[0015] A driving push rod, the driving push rod is connected to the injector and is used to drive the injector;

[0016] A detector, the detector is arranged outside the tank body and connected to the chromatographic column;

[0017] A gas tank, wherein the exhaust end of the gas tank is connected to the detector, and the gas tank is provided with an electric control valve;

[0018] A combustion-supporting tank, the exhaust end of which is connected to the detector, and the gas tank is provided with an electric control valve;

[0019] A controller, wherein the sensor, the temperature controller, the electric control valve, the six-way injector, the driving push rod, the stirring element, and the detector are all connected to the controller by signals;

[0020] Wherein, the capacity of the injector is not less than twice the quantitative loop of the six-way injector, and the detector signal is connected to a computer.

[0021] Optionally, the constant temperature chamber includes a cavity, a heat exchange tube is spirally wrapped around the outside of the cavity, the heat exchange tube is connected to a water tank, a heater is provided in the water tank, a cooling fan is provided outside the water tank, the heat exchange tube is connected to a flow pump, and the heater, cooling fan and flow pump signals are connected to the temperature controller.

[0022] Optionally, an air mixing fan is provided in the cavity.

[0023] Optionally, the tail gas end of the six-port injector is located outside the tank body.

[0024] Optionally, a partition plate is fixedly installed on the inside of the cavity, a plurality of sliding grooves are opened in a circumferential array on the end face of the partition plate, a support member is slidably installed in the sliding groove, a threaded tube is coaxially fixedly installed on the center of the partition plate, the support member passes through the threaded tube, the support member is located at one end inside the threaded tube, a fastener is threadedly connected to the threaded tube, the fastener is provided with an inclined surface that fits the inclined surface of the support member, a return spring is provided between the support member and the threaded tube, the chromatographic column is installed on the outside of the support member array, and the six-way injector, injector, and driving push rod are installed on the end of the partition plate away from the chromatographic column.

[0025] Optionally, a cover is bolted to one end of the cavity located outside the tank body, and the detector is installed on the cover.

[0026] Optionally, a closing cover is hingedly connected to one side of the constant temperature chamber located inside the tank body, and the closing cover is connected to a closing drive. After the closing cover is sealed closed, the air inlet end of the injector is located inside the closing cover.

[0027] Compared with the prior art, the present invention has the following beneficial effects:

[0028] 1. By placing the six-way injector and the chromatographic column inside the tank, the gas path for sample transmission is reduced. By setting the injector capacity to be no less than twice the quantitative loop of the six-way injector, when the injector pushes the sample, the first half of the sample cleans the last residue, thereby reducing the impact of the residual sample on the test result, and facilitating online detection of the gas composition in the anaerobic fermentation reactor at a certain frequency;

[0029] 2. The chromatographic column is usually spirally wound on the column frame. By setting the support and fasteners, when the fasteners are screwed down, the inclined surface at the lower end of the fasteners drives the support to move outward to support the column frame, which is convenient for replacement and disassembly of the chromatographic column. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 is a schematic diagram of the overall structure of an embodiment of the present invention;

[0031] Figure 2 is a schematic structural diagram of a heat exchange tube portion of an embodiment of the present invention;

[0032] Figure 3 is a schematic structural diagram of a chromatographic column portion of an embodiment of the present invention;

[0033] Figure 4 is a schematic structural diagram of an injector portion of an embodiment of the present invention;

[0034] Figure 5 is a schematic structural diagram of a partition plate portion of an embodiment of the present invention;

[0035] Figure 6 is a schematic structural diagram of an air mixing fan part of an embodiment of the present invention;

[0036] Figure 7 yes Figure 6 Enlarged schematic diagram of part A.

[0037] Figure numerals: 1, tank body; 11, feed port; 12, discharge port; 13, exhaust port; 14, detection hole; 2, stirring element; 4, constant temperature chamber; 41, cavity; 411, partition plate; 412, sliding groove; 413, threaded pipe; 414, fastener; 415, return spring; 416, support member; 42, heat exchange tube; 43, water tank; 44, air mixing fan; 45, cover; 461, closed cover; 462, closed drive; 51, chromatographic column; 53, six-way injector; 54, injector; 55, drive push rod; 61, tester. DETAILED DESCRIPTION

[0038] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0039] See also Figure 1-Figure 4 , which is an anaerobic fermentation reactor for facilitating gas component detection disclosed in an embodiment of the present invention, comprises a tank body 1, the tank body 1 comprises a feed port 11, a discharge port 12, an exhaust port 13 and a detection hole 14, a stirring member 2 is installed in the middle of the tank body 1, a plurality of sensors are installed in the tank body 1, the sensors comprise a temperature sensor, an air pressure sensor and a PH sensor, a constant temperature chamber 4 is installed in the detection hole 14, the outer edge of the constant temperature chamber 4 is sealed and connected to the tank body 1, a temperature sensor is arranged in the constant temperature chamber 4, the constant temperature chamber 4 comprises a temperature controller, a chromatographic column 51 is fixedly installed in the constant temperature chamber 4, a gas carrier tank is arranged outside the tank body 1, the exhaust end of the gas carrier tank is connected to the constant temperature chamber 4, the gas carrier tank is provided with an electric control valve, a six-way injector 53 is fixedly installed in the constant temperature chamber 4, the six-way injector 53 is connected to the chromatographic column 51 and the exhaust end of the gas carrier tank, an injector 54 is fixedly installed in the constant temperature chamber 4 Together with the driving push rod 55, the injector 54 is in the shape of a syringe. The injector 54 is provided with an air inlet and an injection port. The air inlet passes through the constant temperature chamber 4 and is connected to the tank body 1. The injection port is connected to the air inlet end of the six-way injector 53. Both the air inlet and the injection port are provided with a one-way valve. The driving push rod 55 is connected to the injector 54 and is used to drive the injector 54. A tester 61 is provided on the outside of the tank body 1. The tester 61 is connected to the chromatographic column 51. The tester 61 is connected to the gas tank and the combustion-supporting tank. The gas tank and the combustion-supporting tank are arranged on the outside of the tank body 1. Both the gas tank and the combustion-supporting tank are provided with an electric control valve. A controller is also provided. The sensor, temperature controller, electric control valve, six-way injector 53, driving push rod 55, stirring element 2, and the tester 61 are all connected to the controller by signal. The capacity of the injector 54 is not less than twice the quantitative ring of the six-way injector 53. The tester 61 is connected to the computer by signal.

[0040] Specifically, a six-way sample injector 53 and a chromatographic column 51 are installed in the constant temperature chamber 4, and the constant temperature chamber 4 is partially set inside the tank body 1 through the detection hole 14. Samples are taken from the tank body 1 through the injector 54. A detector 61 is set on the outside of the tank body 1, and the chromatographic column 51, the gas tank and the combustion-supporting tank are connected to detect the gas, and the detection results are transmitted to the computer for analysis and recording.

[0041] In this way, by arranging the six-way injector 53 and the chromatographic column 51 inside the tank body 1, the gas path for sample transmission is reduced, and by setting the capacity of the injector 54 to be no less than twice the quantitative loop of the six-way injector 53, when the injector 54 pushes the sample, the first half of the sample cleans the previous residue, thereby reducing the impact of the residual sample on the test result, and facilitating online detection of the gas composition in the anaerobic fermentation reactor at a certain frequency.

[0042] In some feasible ways, the tank body 1, the stirring element 2, the sensor, and when the temperature needs to be controlled, the heater installed in the tank body 1 are all common components of the anaerobic fermentation reactor, which will not be described here. The controller can be set as an industrial controller such as a single-chip microcomputer or a PLC, which receives the sensor signal and performs logical control on the opening and closing of the electric control valve, the start of the stirring element 2, the temperature of the constant temperature chamber 4, the detector 61, the driving push rod 55, etc., wherein the electric control valve is an electric control valve that can control the flow rate, which is convenient for controlling the gas flow of the carrier gas tank, the gas tank and the combustion-supporting tank.

[0043] The detection hole 14 is a circular hole, and a flange is installed at one end of the detection hole 14 located outside the tank body 1. The constant temperature chamber 4 is cylindrical, and a flange is installed at one end of the constant temperature chamber 4 located outside the tank body 1, and is bolted to the detection hole 14. The chromatographic column 51 and the tester 61 are set in different models according to the different detection gases. The six-way injector 53, the chromatographic column 51 and the tester 61 are commonly used components of the chromatograph. A carrier gas tank, a fuel gas tank and a combustion-supporting tank are set outside the tank body 1. The carrier gas tank is connected to the chromatographic column 51 for transporting sample gas, which can usually be selected as high-purity nitrogen, etc. The tester 61 is a FID tester 61, and hydrogen and other gases are input through the fuel tank to mix and burn with the sample. Air is set in the combustion-supporting tank. In the space where the tank body 1 is located, there may be other gases that escape from the tank body 1 or other pipelines. By setting the combustion-supporting tank, the impact on the analysis result when the surrounding air is directly used is reduced.

[0044] The injector 54 is in the shape of a syringe, and the driving push rod 55 can be selected as an electric push rod. The injector 54 is provided with an air inlet and an injection port, and is also provided with a one-way valve. The air inlet is for one-way air intake, and the injection port is for one-way exhaust. The injection port gas and the carrier gas enter the chromatographic column 51 together for separation, and then enter the tester 61 for combustion test.

[0045] As a specific embodiment of an anaerobic fermentation reactor for convenient gas composition detection provided by the application, please refer to Figure 2 The constant temperature chamber 4 includes a cavity 41, a heat exchange tube 42 is spirally wound around the outside of the cavity 41, the heat exchange tube 42 is connected to a water tank 43, a heater is arranged in the water tank 43, a cooling fan is arranged outside the water tank 43, the heat exchange tube 42 is connected to a flow pump, and the heater, the cooling fan and the flow pump signals are connected to the temperature controller.

[0046] In general, when analyzing the gas, the chromatographic column 51 needs to be maintained at a relatively stable temperature. By setting up a constant temperature chamber 4, the temperature of the chromatographic column 51 can be maintained. During the fermentation process of the anaerobic fermentation reactor, the temperature is constantly changing. A temperature sensor is provided in the constant temperature chamber 4 to detect the temperature in the cavity 41 in real time.

[0047] In some feasible embodiments, the outer side of the cavity 41 is a double-layer shell, the heat exchange tube 42 is installed between the double-layer shell, and a circulating liquid is arranged in the water tank 43. When the temperature needs to be increased, it is heated by a heater, and when the temperature needs to be reduced, it is cooled by a cooling fan.

[0048] In some feasible ways, when performing gas analysis, the chromatographic column 51 should be kept at a stable and appropriate temperature, and the gas analysis should be performed after the constant temperature chamber 4 runs for a period of time to reach a stable state. At the same time, the constant temperature chamber 4 is set in the tank body 1. Compared with the outside, the temperature in the tank body 1 is stable in a shorter time, and has better heat preservation performance, which is conducive to temperature control.

[0049] For further information, see Figure 6 An air mixing fan 44 is provided in the cavity 41 , and the temperature in the cavity 41 is made uniform by providing the air mixing fan 44 .

[0050] As another specific embodiment of an anaerobic fermentation reactor that is convenient for gas composition detection provided in the application, the tail gas end of the six-way sample injector 53 is located outside the tank body 1.

[0051] In combination with specific usage scenarios, by setting the tail gas end of the six-way sample injector 53 outside the tank body 1, it is convenient to discharge the waste gas when cleaning the quantitative ring of the six-way sample injector 53.

[0052] As a specific embodiment of an anaerobic fermentation reactor for convenient gas composition detection provided by the application, please refer to Figure 3-Figure 5A partition plate 411 is fixedly installed on the inner side of the cavity 41, and a plurality of sliding grooves 412 are provided in a circumferential array on the end face of the partition plate 411. A support member 416 is slidably installed in the sliding groove 412. A threaded tube 413 is coaxially fixedly installed at the center of the partition plate 411. The support member 416 penetrates the threaded tube 413. The support member 416 is located at one end of the threaded tube 413. The threaded tube 413 is threadedly connected with a fastener 414. The fastener 414 is provided with an inclined surface that fits the inclined surface of the support member 416. A return spring 415 is provided between the support member 416 and the threaded tube 413. The chromatographic column 51 is installed on the outside of the support member 416 array, and the six-way injector 53, the injector 54, and the driving push rod 55 are installed on the end of the partition plate 411 away from the chromatographic column 51.

[0053] In combination with specific usage scenarios, the chromatographic column 51 is usually spirally wound on the columnar frame. By setting the support member 416 and the fastener 414, when the fastener 414 is screwed down, the inclined surface at the lower end of the fastener 414 drives the support member 416 to move outward, thereby supporting the columnar frame and facilitating the replacement and disassembly of the chromatographic column 51.

[0054] In some feasible modes, the sliding groove 412 can be set as a T-shaped groove, the middle part of the support member 416 is a rectangular plate, the bottom of the rectangular plate is a T-shaped block adapted to the sliding groove 412, one end of the rectangular plate supporting the column frame is an inverted L-shape for better fixation, and the lower end of the fastener 414 is conical. The six-way injector 53, the driving push rod 55, and the injector 54 are installed at the end of the partition plate 411 away from the chromatographic column 51, and the inner side of the cavity 41 is provided with a step surface, and the partition plate 411 is placed on the step surface and fixed with buckles or bolts.

[0055] In some feasible embodiments, a cover 45 is bolted to one end of the cavity 41 located outside the tank body 1, and the detector 61 is installed on the cover 45. The bolt connection is provided to facilitate disassembly and assembly.

[0056] As another specific embodiment of an anaerobic fermentation reactor for facilitating gas composition detection provided by the application, please refer to Figure 6-Figure 7 A closing cover 461 is hingedly connected to one side of the constant temperature chamber 4 located in the tank body 1 , and the closing cover 461 is connected to a closing drive 462 . After the closing cover 461 is sealed and closed, the air inlet end of the injector 54 is located in the closing cover 461 .

[0057] It should be understood that there will be a large change in the air pressure in the tank body 1 during the fermentation process. In the process of injecting gas into the chromatographic column 51 by the injector 54, the different air pressures in the tank body 1 cause the gas content in the quantitative loop of the six-way injector 53 to change. By setting the closing cover 461, after the air intake is completed, the closing cover 461 is used to seal the injector 54 so that it is connected to the atmosphere only through the tail gas end of the six-way injector 53, and the air pressure in the six-way injector 53 gradually approaches the atmospheric pressure, thereby stabilizing the gas content in the quantitative loop and improving the detection accuracy.

[0058] In some feasible embodiments, the closed drive 462 is an electric push rod, and the closed cover 461 is fixedly mounted with a sealing ring.

[0059] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An anaerobic fermentation reactor that is convenient for gas component detection, characterized in that: include: A tank body, the tank body comprising a feed port, a discharge port, an exhaust port and a detection hole; A stirring member, the stirring member is installed in the middle of the tank body; Sensors, including a temperature sensor, an air pressure sensor and a PH sensor, and the sensors are installed in the tank; A constant temperature chamber, the constant temperature chamber is installed in the detection hole, the outer edge of the constant temperature chamber is sealed and connected to the tank body, the temperature sensor is arranged in the constant temperature chamber, and the constant temperature chamber includes a temperature controller; A chromatographic column, wherein the chromatographic column is fixedly installed in the constant temperature chamber; A gas carrier tank, the exhaust end of which is connected to the constant temperature chamber, and the gas carrier tank is provided with an electric control valve; A six-way injector, the six-way injector is connected to the chromatographic column and the exhaust end of the carrier gas tank; An injector, the injector is in the shape of a syringe, the injector is provided with an air inlet and an injection port, the air inlet passes through the constant temperature chamber and is connected to the tank body, the injection port is connected to the air inlet end of the six-way injector, and the air inlet and the injection port are both provided with a one-way valve; A driving push rod, the driving push rod is connected to the injector and is used to drive the injector; A detector, the detector is arranged outside the tank body and connected to the chromatographic column; A gas tank, wherein the exhaust end of the gas tank is connected to the detector, and the gas tank is provided with an electric control valve; A combustion-supporting tank, the exhaust end of which is connected to the detector, and the gas tank is provided with an electric control valve; A controller, wherein the sensor, the temperature controller, the electric control valve, the six-way injector, the driving push rod, the stirring element, and the detector are all connected to the controller by signals; Wherein, the capacity of the injector is not less than twice the quantitative loop of the six-way injector, and the detector signal is connected to a computer.

2. The anaerobic fermentation reactor for facilitating gas component detection according to claim 1, characterized in that: The constant temperature room includes a cavity, a heat exchange tube is spirally wrapped around the outside of the cavity, the heat exchange tube is connected to a water tank, a heater is arranged in the water tank, a cooling fan is arranged outside the water tank, the heat exchange tube is connected to a flow pump, and the heater, cooling fan and flow pump signals are connected to the temperature controller.

3. An anaerobic fermentation reactor for facilitating gas component detection according to claim 2, characterized in that: An air mixing fan is arranged in the cavity.

4. The anaerobic fermentation reactor for facilitating gas component detection according to claim 1, characterized in that: The tail gas end of the six-way sample injector is located outside the tank body.

5. The anaerobic fermentation reactor for facilitating gas component detection according to claim 2, characterized in that: A partition plate is fixedly installed on the inside of the cavity, a plurality of sliding grooves are opened in a circumferential array on the end face of the partition plate, a support member is slidably installed in the sliding groove, a threaded tube is coaxially fixedly installed on the center of the partition plate, the support member passes through the threaded tube, one end of the support member is located in the threaded tube, a fastener is threadedly connected to the threaded tube, the fastener is provided with an inclined surface that fits the inclined surface of the support member, a return spring is provided between the support member and the threaded tube, the chromatographic column is installed on the outside of the support member array, and the six-way injector, the injector, and the driving push rod are installed on the end of the partition plate away from the chromatographic column.

6. The anaerobic fermentation reactor for facilitating gas component detection according to claim 5, characterized in that: The cavity is bolted and installed with a cover at one end located outside the tank body, and the detector is installed on the cover.

7. The anaerobic fermentation reactor for facilitating gas component detection according to claim 1, characterized in that: A closing cover is hingedly connected to one side of the constant temperature chamber located inside the tank body, and the closing cover is connected to a closing drive. After the closing cover is sealed and closed, the air inlet end of the injector is located inside the closing cover.

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