A bionic rotary plug-flow organic solid waste anaerobic digestion reaction device

Abstract

The present invention discloses a bionic rotary plug-flow organic solid waste anaerobic digestion reaction device, comprising a reactor capable of reacting organic solid waste therein, wherein a corridor partition distributed along its length is provided in the inner cavity of the reactor, wherein the corridor partition divides the inner cavity of the reactor into an annular inner cavity, and a feed port for draining the organic solid waste into the annular inner cavity is provided at one end of the reactor, and a discharge port for draining the organic solid waste after anaerobic digestion from its annular inner cavity is provided at the other end of the reactor. The present invention adopts the above results and has a reasonable overall design, simple structure, and convenient operation. It can simulate the digestion process of the ruminant intestine through the slow rotation of the reactor, and realize the plug-flow operation of the anaerobic digestion of the organic solid waste in combination with the gravity of the organic solid waste itself, thereby forming a front-to-back separation of the acid-producing phase and the methane-producing phase in the anaerobic digestion process, effectively improving the anaerobic conversion efficiency of the organic solid waste.

Description

Technical Field

[0001] The invention relates to the technical field of anaerobic digestion treatment of organic solid waste, and in particular to a bionic rotary plug-flow type organic solid waste anaerobic digestion reaction device. Background Art

[0002] Organic solid waste (such as municipal sludge and livestock manure) has a complex structure and has both polluting and resource-intensive properties. Failure to properly treat and dispose of organic solid waste will result in serious environmental pollution and resource waste.

[0003] Anaerobic digestion is a treatment technology that can convert organic matter in organic solid waste into clean energy. The process includes four stages: hydrolysis, acidification, hydrogen and acetic acid production, and methane production. Each stage is completed by different microorganisms. For example, hydrolysis and acidification microorganisms use large-molecule organic matter as substrates and convert them into small-molecule organic matter. Methanogenic microorganisms continue to convert small-molecule organic matter such as acetic acid into methane, thereby achieving synergistic degradation of organic solid waste.

[0004] Continuous stirred-tank reactors (CSTRs) are currently the primary anaerobic digestion vessels used in engineering applications. These reactors enhance the contact between organic matter and microorganisms through the mixing action of the agitator, improving anaerobic digestion efficiency to a certain extent. However, the complete mixing of substrates within the reactor leads to non-functional collisions between microorganisms and substrates at different stages of anaerobic digestion, such as collisions between hydrolytic and acidifying microorganisms and small organic molecules, and collisions between methanogenic microorganisms and large organic molecules, thereby reducing the synergistic degradation efficiency of functional microorganisms. The organic loading of CSTRs used in existing projects is approximately 6 kg / m³·d, far below the organic loading of ruminant digestion systems in nature, which can withstand 100 kg / m³·d.

[0005] To address the above issues, researchers conducted an exploratory study on the plug-flow reactor (PFR) by simulating the digestion process of ruminants. They found that there were certain differences in the reaction substrates and functional microorganisms at the front and rear ends of the reactor: (1) the front end of the reactor mainly degraded large molecular organic matter to produce acid, while the rear end mainly degraded small molecular organic matter to produce methane; (2) the substrate concentration in the reactor was distributed in a gradient; (3) the front and rear ends of the reactor were enriched with hydrolytic acidifying microorganisms and methanogenic microorganisms, respectively.

[0006] Although similar studies can improve the efficiency of anaerobic digestion to a certain extent, there are still some problems. The main ones are that on the one hand, the substrate in the reactor is only pushed when feeding, and the continuous flow of the substrate cannot be achieved. On the other hand, the microorganisms in the reactor cannot efficiently contact and react with the substrate, and the effective separation of the hydrolysis and acidification phase and the methanogenesis phase during the anaerobic digestion process cannot be achieved, which reduces the anaerobic digestion efficiency of organic solid waste and brings great inconvenience to the anaerobic digestion of organic solid waste. Summary of the Invention

[0007] In order to solve the problems existing in the prior art, the present invention aims to provide a bionic rotary plug-flow organic solid waste anaerobic digestion reaction device. The overall design of the reaction device is reasonable, the structure is simple, and the operation is convenient. The device can simulate the digestion process of the ruminant intestine through the slow rotation of the reactor, and combine the gravity of the organic solid waste inside it to realize the plug-flow operation of the anaerobic digestion of organic solid waste, thereby forming the front and back separation of the acid-producing phase and the methane-producing phase in the anaerobic digestion process, and effectively improving the anaerobic conversion efficiency of organic solid waste.

[0008] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0009] A bionic rotary plug flow organic solid waste anaerobic digestion reaction device, characterized by comprising

[0010] A reactor capable of reacting organic solid waste within the reactor, wherein a corridor partition is provided within the reactor's inner cavity and distributed along its length, wherein the corridor partition divides the reactor's inner cavity into an annular inner cavity, wherein a feed port for directing the organic solid waste into the annular inner cavity is provided at one end of the reactor, and a discharge port for directing the organic solid waste after anaerobic digestion from the annular inner cavity is provided at the other end of the reactor;

[0011] A fixture that is generally cylindrical and hollow inside, wherein the reactor is fixedly installed inside the fixture and is coaxial with the fixture;

[0012] a biogas collection structure for collecting biogas generated after anaerobic digestion of organic solid waste in the reactor, wherein the biogas collection structure is in communication with the annular inner cavity of the reactor;

[0013] a drive motor for driving the fixing device to rotate and enabling the organic solid waste discharged into the reactor to simulate the digestion process in the intestines of ruminants to achieve anaerobic digestion of the organic solid waste by plug flow operation, wherein the output shaft of the drive motor is connected to the fixing device and is coaxial therewith;

[0014] a motor fixing device for fixing a drive motor, wherein the drive motor is fixedly mounted on the motor fixing device, and the motor fixing device is placed in an environment where anaerobic digestion of organic solid waste is required;

[0015] a control structure for controlling the working state of the drive motor, the control structure being disposed on the motor fixing device and being communicatively connected to the drive motor and the biogas collecting structure respectively;

[0016] A power supply module for providing power to the drive motor and the control structure, wherein the power supply module is electrically connected to the drive motor and the control structure respectively, and a power switch for controlling the working state of the power supply module is provided on the motor fixing device.

[0017] In a preferred embodiment of the present invention, the bionic rotary plug-flow organic solid waste anaerobic digestion reaction device further includes a water bath heating device for providing a temperature environment for anaerobic digestion of organic solid waste in the reactor, and the water bath heating device is communicatively connected to the control structure.

[0018] In a preferred embodiment of the present invention, the water bath heating device comprises

[0019] a water bath heating layer covering the outside of the reactor, wherein a water bath heating cavity for water bath heating is formed between the water bath heating layer and the outside of the reactor;

[0020] a water bath circulation device for providing a water source for water bath heating, the water bath circulation device being arranged on one side of the motor fixing device and being in communication connection with the control structure;

[0021] A water bath tube, wherein a water bath partition is provided inside the water bath tube and extends along the length direction of the water bath tube, the water bath partition divides the inner cavity of the water bath tube into two independent water inlet chambers and water outlet chambers, one end of the water bath tube is connected to a water bath circulation device, and the water inlet of the water inlet chamber is connected to the water outlet of the water bath circulation device, and the water outlet of the water outlet chamber is connected to the water inlet of the water bath circulation device, the other end of the water bath tube is connected to a water bath heating layer through a quick plug connector, and the water outlet of the water inlet chamber is connected to the water inlet of the water bath heating chamber, and the water inlet of the water outlet chamber is connected to the water outlet of the water bath heating chamber.

[0022] In a preferred embodiment of the present invention, the fixing device includes an iron circular plate made of iron material and a transparent circular plate made of organic glass, and a transparent circular ring made of organic glass is provided between the iron circular plate and the transparent circular plate.

[0023] In a preferred embodiment of the present invention, the biogas collection structure comprises

[0024] A biogas collection bag for collecting biogas generated after anaerobic digestion of organic solid waste in a reactor;

[0025] A biogas drainage pipe is used to drain the biogas in the annular inner cavity into the biogas collection bag. The air inlet end of the biogas drainage pipe is connected to the annular inner cavity of the reactor, and the air outlet end of the biogas drainage pipe is connected to the biogas collection bag. An electromagnetic one-way valve is provided at the air outlet end of the biogas drainage pipe, and the electromagnetic one-way valve is communicatively connected to the control structure.

[0026] In a preferred embodiment of the present invention, the motor fixing device includes a motor fixing column and a fixing base. The fixing base is placed in an environment where anaerobic digestion of organic solid waste is required. The motor fixing column is arranged at the upper end of the fixing base, and the drive motor is fixedly mounted on the motor fixing column.

[0027] In a preferred embodiment of the present invention, the control structure includes

[0028] a control module for controlling the drive motor, the water bath heating device, and the biogas collection structure, wherein the control module is communicatively connected to the drive motor, the water bath heating device, and the biogas collection structure respectively;

[0029] a display screen for displaying the motor speed, the display screen being disposed on the motor fixing device and being in communication connection with the control module;

[0030] A speed regulating knob for regulating the motor speed is provided on the motor fixing device and is in communication connection with the control module.

[0031] Compared with the prior art, the present invention adopts the above results and has a reasonable overall design, simple structure, and easy operation. It can simulate the digestion process of the ruminant intestine through the slow rotation of the reactor, and combine the gravity of the organic solid waste inside it to realize the plug flow operation of the anaerobic digestion of organic solid waste, thereby forming the front and back separation of the acid-producing phase and the methane-producing phase in the anaerobic digestion process, effectively improving the anaerobic conversion efficiency of organic solid waste. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0033] Figure 1 It is a structural schematic diagram of the present invention.

[0034] Figure 2 It is a transverse cross-sectional view of the present invention.

[0035] Figure 3 It is a longitudinal sectional view of the present invention. DETAILED DESCRIPTION

[0036] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below with reference to specific illustrations.

[0037] Reference Figure 1-Figure 3 As shown in the figure, a bionic rotary plug flow organic solid waste anaerobic digestion reaction device is provided, which includes a reactor 100, a fixing device 200, a biogas collection structure, a driving motor 400, a motor fixing device 500, a control structure 600 and a power module.

[0038] The reactor 100 is capable of allowing organic solid waste to react inside it. A corridor partition 1100 is provided in the inner cavity of the reactor 100 and distributed along its length. The corridor partition 1100 divides the inner cavity of the reactor 100 into an annular inner cavity 1200. A feed port 110 for draining the organic solid waste into the annular inner cavity is provided at one end of the reactor 100, and a discharge port 120 for draining the organic solid waste after anaerobic digestion from its annular inner cavity is provided at the other end of the reactor 100.

[0039] The volume of the organic solid waste drained into the reactor 100 accounts for half of the total volume of the reactor, avoiding contact and mixing between the large molecular organic matter and microorganisms at the front end of the organic solid waste and the small molecular organic matter and microorganisms at the end. When the reactor is rotated to a certain angle (such as 90°), some of the undegraded large molecular organic matter at the end of the reactor 100 can also flow back to the front end by gravity for further degradation.

[0040] The fixing device 200 is cylindrical as a whole and hollow inside. The reactor 100 is fixedly installed inside the fixing device 200 and is coaxial with it. The biogas collection structure is used to collect the biogas generated after anaerobic digestion of organic solid waste in the reactor 100. The biogas collection structure is connected to the annular inner cavity of the reactor 100.

[0041] The drive motor 400 is used to drive the fixing device to rotate and enable the organic solid waste drained into the reactor 100 to simulate the digestion process of the ruminant intestine to achieve the plug flow operation of the anaerobic digestion of organic solid waste. The output shaft 410 of the drive motor 400 is connected to the fixing device 200 and is coaxial with it.

[0042] The motor fixing device 500 is used to fix the drive motor 400, and the drive motor 400 is fixedly installed on the motor fixing device 500. The motor fixing device 500 is placed in an environment where anaerobic digestion of organic solid waste is required. The control structure 600 is used to control the working state of the drive motor. The control structure 600 is set on the motor fixing device 500 and is respectively communicated with the drive motor 400 and the biogas collection structure.

[0043] The power module is used to provide power to the drive motor 400 and the control structure 600. The power module is electrically connected to the drive motor 400 and the control structure 600 respectively, and a power switch 700 for controlling the working state of the power module is provided on the motor fixing device.

[0044] The bionic rotary plug-flow organic solid waste anaerobic digestion reaction device also includes a water bath heating device for providing a temperature environment for anaerobic digestion of the organic solid waste in the reactor, and can maintain the temperature of the organic solid waste at 35±2°C or 55±2°C. The temperature signal feedback can be correspondingly fed back through a temperature sensor, and the water bath heating device is communicatively connected to the control structure.

[0045] The water bath heating device includes a water bath heating layer 900, a water bath circulation device and a water bath tube 800. The water bath heating layer 900 is wrapped around the outside of the reactor 100. A water bath heating chamber 1000 for water bath heating is formed between the water bath heating layer 900 and the outside of the reactor 100.

[0046] The water bath circulation device is used to provide a water source for water bath heating. The water bath circulation device is arranged on one side of the motor fixing device 500 and is communicatively connected with the control structure 600 .

[0047] A water bath partition is provided inside the water bath tube 800 and extends along the length direction of the water bath tube. The water bath partition divides the inner cavity of the water bath tube into two independent water inlet chambers and water outlet chambers. One end of the water bath tube 800 is connected to the water bath circulation equipment, and the water inlet of the water inlet chamber is connected to the water outlet of the water bath circulation equipment, and the water outlet of the water outlet chamber is connected to the water inlet of the water bath circulation equipment.

[0048] The other end of the water bath tube 800 is connected to the water bath heating layer 900 through a quick connector 1300, and the water outlet of the water inlet cavity is connected to the water inlet of the water bath heating cavity 1000, and the water inlet of the water outlet cavity is connected to the water outlet of the water bath heating cavity.

[0049] The fixing device 200 includes an iron circular plate 210 made of iron material and a transparent circular plate 230 made of organic glass. A transparent ring 220 made of organic glass is provided between the iron circular plate 210 and the transparent circular plate 230 .

[0050] The biogas collection structure includes a biogas collection bag and a biogas drainage pipe 300. The biogas collection bag is used to collect biogas generated after anaerobic digestion of organic solid waste in the reactor.

[0051] The biogas drainage pipe 300 is used to drain the biogas in the annular inner cavity into the biogas collection bag. The air inlet end of the biogas drainage pipe 300 is connected to the annular inner cavity 1200 of the reactor 100, and the air outlet end of the biogas drainage pipe 300 is connected to the biogas collection bag. An electromagnetic one-way valve is provided at the air outlet end of the biogas drainage pipe 300, and the electromagnetic one-way valve is communicated with the control structure.

[0052] The motor fixing device 500 includes a motor fixing column 510 and a fixing base 520. The fixing base 520 is placed in an environment where anaerobic digestion of organic solid waste is required. The motor fixing column 510 is set at the upper end of the fixing base 520, and the driving motor 400 is fixedly installed on the motor fixing column 510.

[0053] The control structure 600 includes a control module, a display screen 610 and a speed control knob 620. The control module is used to control the drive motor 400, the water bath heating device and the biogas collection structure. The control module is communicated with the drive motor 400, the water bath heating device and the biogas collection structure respectively.

[0054] The display screen 610 is used to display the rotational speed of the drive motor 400. The display screen 610 is set on the motor fixing device 500 and is communicated with the control module. The speed control knob 620 is used to adjust the rotational speed of the drive motor 400. The speed control knob 620 is set on the fixed base 520 of the motor fixing device 500 and is communicated with the control module.

[0055] The speed knob 620 can control the output shaft speed of the drive motor 400 to be between 16.8 min and 28.8 min per revolution, and is used to simulate the digestion speed of ruminants.

[0056] The working process of the present invention is as follows:

[0057] During actual use, turn on the power switch and adjust the speed knob to control the drive motor to an appropriate speed. The control module controls the drive motor to work at the speed adjusted by the speed knob. The rotation of the motor output shaft drives the fixing device to rotate at the same speed, so that the reactor set in the fixing device also rotates at the same speed, thereby causing the organic solid waste in the reactor to move in the annular inner cavity of the reactor, and finally realizing the push flow operation of the organic solid waste in the reactor.

[0058] In summary, the present invention adopts the above results and has a reasonable overall design, simple structure, and easy operation. It can simulate the digestion process of the ruminant intestine through the slow rotation of the reactor, and combine the gravity of the organic solid waste inside it to realize the plug flow operation of the anaerobic digestion of organic solid waste, thereby forming the front and back separation of the acid-producing phase and the methane-producing phase in the anaerobic digestion process, effectively improving the anaerobic conversion efficiency of organic solid waste.

[0059] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A bionic rotary plug flow organic solid waste anaerobic digestion reaction device, characterized in that: The invention comprises a reactor capable of reacting organic solid waste therein, wherein a corridor partition is provided in the inner cavity of the reactor and distributed along the length thereof, wherein the corridor partition divides the inner cavity of the reactor into an annular inner cavity, a feed port for draining the organic solid waste into the annular inner cavity is provided at one end of the reactor, and a discharge port for draining the organic solid waste after anaerobic digestion from the annular inner cavity is provided at the other end of the reactor; A fixture that is generally cylindrical and hollow inside, wherein the reactor is fixedly installed inside the fixture and is coaxial with the fixture; a biogas collection structure for collecting biogas generated after anaerobic digestion of organic solid waste in the reactor, wherein the biogas collection structure is in communication with the annular inner cavity of the reactor; a drive motor for driving the fixing device to rotate and enabling the organic solid waste drained into the reactor to simulate the digestion process of the ruminant's intestines to achieve anaerobic digestion of the organic solid waste by plug flow operation, wherein the output shaft of the drive motor is connected to the fixing device and is coaxial therewith; a motor fixing device for fixing a drive motor, wherein the drive motor is fixedly mounted on the motor fixing device, and the motor fixing device is placed in an environment where anaerobic digestion of organic solid waste is required; a control structure for controlling the working state of the drive motor, the control structure being disposed on the motor fixing device and being communicatively connected to the drive motor and the biogas collecting structure respectively; A power supply module for providing power to the drive motor and the control structure, wherein the power supply module is electrically connected to the drive motor and the control structure respectively, and a power switch for controlling the working state of the power supply module is provided on the motor fixing device.

2. The bionic rotary plug-flow organic solid waste anaerobic digestion reaction device according to claim 1, characterized in that: The bionic rotary plug-flow organic solid waste anaerobic digestion reaction device further includes a water bath heating device for providing a temperature environment for anaerobic digestion of the organic solid waste in the reactor, and the water bath heating device is communicatively connected to the control structure.

3. The bionic rotary plug flow organic solid waste anaerobic digestion reaction device according to claim 2, characterized in that: The water bath heating device comprises a water bath heating layer covering the outside of the reactor, wherein a water bath heating cavity for water bath heating is formed between the water bath heating layer and the outside of the reactor; a water bath circulation device for providing a water source for water bath heating, the water bath circulation device being arranged on one side of the motor fixing device and being in communication connection with the control structure; A water bath tube, wherein a water bath partition is provided inside the water bath tube and extends along the length direction of the water bath tube, the water bath partition divides the inner cavity of the water bath tube into two independent water inlet chambers and water outlet chambers, one end of the water bath tube is connected to a water bath circulation device, and the water inlet of the water inlet chamber is connected to the water outlet of the water bath circulation device, and the water outlet of the water outlet chamber is connected to the water inlet of the water bath circulation device, the other end of the water bath tube is connected to a water bath heating layer through a quick plug connector, and the water outlet of the water inlet chamber is connected to the water inlet of the water bath heating chamber, and the water inlet of the water outlet chamber is connected to the water outlet of the water bath heating chamber.

4. The bionic rotary plug-flow organic solid waste anaerobic digestion reaction device according to claim 1, characterized in that: The fixing device comprises an iron circular plate made of iron material and a transparent circular plate made of organic glass. A transparent circular ring made of organic glass is arranged between the iron circular plate and the transparent circular plate.

5. The bionic rotary plug flow organic solid waste anaerobic digestion reaction device according to claim 1, characterized in that: The biogas collection structure includes A biogas collection bag for collecting biogas generated after anaerobic digestion of organic solid waste in a reactor; A biogas drainage pipe is used to drain the biogas in the annular inner cavity into the biogas collection bag. The air inlet end of the biogas drainage pipe is connected to the annular inner cavity of the reactor, and the air outlet end of the biogas drainage pipe is connected to the biogas collection bag. An electromagnetic one-way valve is provided at the air outlet end of the biogas drainage pipe, and the electromagnetic one-way valve is communicatively connected to the control structure.

6. The bionic rotary plug-flow organic solid waste anaerobic digestion reaction device according to claim 1, characterized in that: The motor fixing device includes a motor fixing column and a fixing base. The fixing base is placed in an environment where organic solid waste needs to be anaerobic digested. The motor fixing column is arranged on the upper end of the fixing base, and the drive motor is fixedly mounted on the motor fixing column.

7. The bionic rotary plug-flow organic solid waste anaerobic digestion reaction device according to claim 2, characterized in that: The control structure includes a control module for controlling the drive motor, the water bath heating device, and the biogas collection structure, wherein the control module is communicatively connected to the drive motor, the water bath heating device, and the biogas collection structure respectively; a display screen for displaying the motor speed, the display screen being disposed on the motor fixing device and being in communication connection with the control module; A speed regulating knob for regulating the motor speed is provided on the motor fixing device and is in communication connection with the control module.

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