CN109459341B - Experimental device and method for organic matter biogas output - Google Patents
Experimental device and method for organic matter biogas output Download PDFInfo
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- CN109459341B CN109459341B CN201811587797.4A CN201811587797A CN109459341B CN 109459341 B CN109459341 B CN 109459341B CN 201811587797 A CN201811587797 A CN 201811587797A CN 109459341 B CN109459341 B CN 109459341B
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- 239000005416 organic matter Substances 0.000 title claims abstract description 23
- 238000000034 method Methods 0.000 title claims abstract description 21
- 239000007789 gas Substances 0.000 claims abstract description 118
- 238000006243 chemical reaction Methods 0.000 claims abstract description 96
- 239000011261 inert gas Substances 0.000 claims abstract description 53
- 239000007788 liquid Substances 0.000 claims abstract description 41
- 230000000813 microbial effect Effects 0.000 claims abstract description 37
- 238000003860 storage Methods 0.000 claims abstract description 32
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 30
- 244000005700 microbiome Species 0.000 claims abstract description 16
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims abstract description 12
- 230000001954 sterilising effect Effects 0.000 claims abstract description 11
- 238000007789 sealing Methods 0.000 claims description 59
- 238000004659 sterilization and disinfection Methods 0.000 claims description 6
- 238000011049 filling Methods 0.000 claims description 3
- 239000007858 starting material Substances 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 12
- 230000001276 controlling effect Effects 0.000 abstract description 6
- 238000011161 development Methods 0.000 abstract description 4
- 238000011065 in-situ storage Methods 0.000 abstract description 4
- 230000001105 regulatory effect Effects 0.000 abstract description 4
- 238000004088 simulation Methods 0.000 abstract description 4
- 238000002474 experimental method Methods 0.000 description 18
- 239000003245 coal Substances 0.000 description 10
- 230000008859 change Effects 0.000 description 8
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 6
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- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N7/00—Analysing materials by measuring the pressure or volume of a gas or vapour
- G01N7/14—Analysing materials by measuring the pressure or volume of a gas or vapour by allowing the material to emit a gas or vapour, e.g. water vapour, and measuring a pressure or volume difference
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/22—Fuels; Explosives
- G01N33/222—Solid fuels, e.g. coal
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/22—Fuels; Explosives
- G01N33/225—Gaseous fuels, e.g. natural gas
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/24—Earth materials
- G01N33/241—Earth materials for hydrocarbon content
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E50/00—Technologies for the production of fuel of non-fossil origin
- Y02E50/30—Fuel from waste, e.g. synthetic alcohol or diesel
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Abstract
The invention relates to the technical field of development of coalbed methane and shale gas, in particular to an experimental device and method for producing organic matter biogas. The invention is through controlling the experimental apparatus of the biological gas output of a kind of organic matter that the microbial reaction system, gas storage circulation system and pressure boost and exhaust system make up, through the apparatus sterilizing treatment, matching device, apparatus are installed, starting device, collect gas and liquid and detect six steps of gas and liquid, temperature, pressure and hydrodynamic force condition while the stratum in situ microorganism degrades; providing stratum reaction temperature through a water bath constant temperature system; regulating and simulating different stratum pressures through a pressure reducing valve of a high-pressure inert gas bottle; different water flow rates underground are simulated by means of the flow control of the advection pump. The core sample with the diameter of 42cm can be placed in the biological reaction tank body, the block sample or the powdery sample can also be placed in the biological reaction tank body, and the application range of the sample is wider. The method is simple in operation, low in economic cost and more approximate to the actual condition of the stratum in simulation result.
Description
Technical Field
The invention relates to the technical field of development of coalbed methane and shale gas, in particular to an experimental device and method for producing organic matter biogas.
Background
In the development field of coal bed gas and shale gas, the microbial gasification technology has the characteristics of yield increase, permeation increase and reutilization, so that the microbial gasification technology has unique advantages in the development of abandoned mining areas, low-rank coal and shale gas. The traditional point of view considers that reserved coal pillars in abandoned mining areas and low-rank coal beds with low coalbed methane content have no exploitation value, and partial organic matters of coal or shale can be converted into biogas by utilizing a microbial gasification technology, so that the gas saturation of a reservoir is improved; the microbial degradation of coal rock and shale organic matters also has the effect of increasing the permeability of the reservoir.
Microbial gasification technology has made great progress in improving crude oil recovery, heavy oil recovery, cracking of urban biochemical waste, etc., but has remained mainly in laboratory research stage in terms of bioconversion of coal and shale organic matter. At present, the biogas output experimental device is mainly divided into two types, one type is standing or shake culture biogas production in an anaerobic bottle, the method is simple to operate and low in cost, a plurality of samples can be cultured at the same time, and the method is a main stream method for simulating biogas output in a laboratory at present; a method for culturing the organic matter in the culture medium by stirring in fermentor features that a large number of organic matter samples can be put in it, but its cost is high.
Disclosure of Invention
The invention aims to provide an experimental device and method for simulating the temperature and pressure conditions of an original stratum, providing different water flow rate conditions, simulating the hydrocarbon production process and hydrocarbon production potential of organic matters such as coal rock, shale and the like under the geological conditions of different temperatures, pressures and water flow rates of a coal seam in situ, and deepening the output mechanism of the experimental device and method.
In order to achieve the above purpose, the invention adopts the following technical scheme:
an experimental device for producing organic matter biogas comprises a temperature control system, a microbial reaction system, a gas storage circulation system, a pressurizing and exhausting system, a first connecting pipe, a second connecting pipe and a fourth connecting pipe; the gas storage circulation system at least comprises a headspace container, one end of the microbial reaction system enters the headspace container through the upper surface of the headspace container through a fourth connecting pipe, and the other end of the microbial reaction system is connected with the bottom of the gas storage circulation system through a second connecting pipe; the pressurizing and exhausting system is connected to the second connecting pipe through the first connecting pipe; the microbial reaction system and the gas storage circulation system are arranged in the temperature control system.
The temperature control system adopts a water bath temperature control system.
The water bath temperature control system adopts a constant-temperature water bath box.
The microbial reaction system at least comprises a biological reaction tank body, one end of the biological reaction tank body is detachably connected with a second sealing cover through a second sealing gasket, the upper part of the second sealing cover is connected with one end of a third conduit through a second through hole, and the other end of the third conduit is connected with a fourth connecting pipe through a filter; the lower part of the second sealing cover is provided with a liquid outlet; the other end of the biological reaction tank body is detachably connected with a first sealing cover through a first sealing gasket, the upper part of the first sealing cover is connected with one end of a second connecting conduit through a first through hole, and the other end of the second connecting conduit is connected with the bottom of the headspace container through a advection pump.
The outside of the liquid outlet is connected with a second two-way valve.
The gas storage circulation system also comprises a pressure gauge, a fifth connecting conduit, a fourth two-way valve and a third two-way valve; the pressure gauge is connected to the upper surface of the headspace container through a third two-way valve, one end of the fifth connecting conduit penetrates through the lower bottom surface of the headspace container and extends into the headspace container, and the other end of the fifth connecting conduit is connected with the second connecting conduit; the upper surface of the headspace container is also provided with an air taking port and an air exhaust port, and the air exhaust port is connected with a fourth two-way valve.
The pressurizing and exhausting system comprises a high-pressure inert gas bottle, an inert gas bottle valve, a gas pressure reducing valve and a first two-way valve; the high-pressure inert gas bottle is connected with the input end of the gas pressure reducing valve, the output end of the gas pressure reducing valve is connected with the first connecting conduit, and the first two-way valve is connected to the first connecting conduit.
The gas in the high-pressure inert gas bottle is high-purity nitrogen.
The water bath temperature control system adopts a constant-temperature water bath box, the microbial reaction system at least comprises a biological reaction tank body, one end of the biological reaction tank body is detachably connected with a second sealing cover through a second sealing gasket, the upper part of the second sealing cover is connected with one end of a third conduit through a second through hole, and the other end of the third conduit is connected with a fourth connecting pipe through a filter; the lower part of the second sealing cover is provided with a liquid outlet; the other end of the biological reaction tank body is detachably connected with a first sealing cover through a first sealing gasket, the upper part of the first sealing cover is connected with one end of a second connecting conduit through a first through hole, and the other end of the second connecting conduit is connected with the bottom of the headspace container through a advection pump; the outer side of the liquid outlet is connected with a second two-way valve; the gas storage circulation system also comprises a pressure gauge, a fifth connecting conduit, a fourth two-way valve and a third two-way valve; the pressure gauge is connected to the upper surface of the headspace container through a third two-way valve, one end of the fifth connecting conduit penetrates through the lower bottom surface of the headspace container and extends into the headspace container, and the other end of the fifth connecting conduit is connected with the second connecting conduit; the upper surface of the headspace container is also provided with an air taking port and an air exhaust port, and the air exhaust port is connected with a fourth two-way valve; the pressurizing and exhausting system comprises a high-pressure inert gas bottle, an inert gas bottle valve, a gas pressure reducing valve and a first two-way valve; the high-pressure inert gas bottle is connected with the input end of the gas pressure reducing valve, the output end of the gas pressure reducing valve is connected with the first connecting conduit, and the first two-way valve is connected to the first connecting conduit.
A test method of an experimental device for producing organic matter biogas comprises the following steps of
Step one: implement sterilization treatment
Sterilizing the biological reaction tank body, the headspace container, the culture solution, the first sealing cover, the second sealing cover, the filter, the first connecting conduit, the second connecting conduit, the third connecting conduit, the fourth connecting conduit, the fifth connecting conduit, the first two-way valve, the second two-way valve, the third two-way valve and the fourth two-way valve;
step two: matching device
Placing an organic matter sample into the biological reaction tank body treated in the first step, and filling a culture solution into the headspace container treated in the first step;
step three: device mounting
Connecting all the parts processed in the first step and the second step;
step four: starter device
Sequentially opening an inert gas bottle valve, a gas pressure reducing valve, a first two-way valve and a fourth two-way valve in a pressurizing and exhausting system, continuously introducing high-purity inert gas for 10-20 minutes, removing residual air in a microbial reaction system and a gas storage circulating system, closing the fourth two-way valve, adjusting the gas pressure reducing valve to set formation pressure, closing the first two-way valve, the inert gas bottle valve and the gas pressure reducing valve, and then opening a temperature control system and a power switch of a advection pump to enable culture solution in a headspace container to circularly flow in a clockwise direction;
step five: collecting gas and liquid
Collecting top end gas in the headspace container from the gas-taking port in different time periods; collecting liquid in the bioreactor from the liquid outlet;
sixth, detecting gas and liquid
And (3) detecting the gas components and the methane concentration of the gas collected in the step five, and analyzing the microorganism diversity of the liquid.
The beneficial effects are that:
according to the experimental device for producing the organic matter biogas, which is composed of the temperature control system, the microbial reaction system, the gas storage circulation system and the pressurizing and exhausting system, the six steps of sterilizing the device, matching the device, installing the device, starting the device, collecting gas and liquid and detecting the gas and liquid are adopted, so that the temperature required by the reaction can be accurately controlled in the experimental process, and the cleaning work of the experimental instrument in the experimental preparation stage and the experimental ending stage is facilitated; the biological reaction tank body is connected with a filter, so that fine particles such as coal dust can be prevented from entering the headspace container; the pressurizing and exhausting system uses an external high-pressure inert gas bottle, a pressure reducing valve and a first two-way valve to independently control the initial pressure and anaerobic environment in the system, and when the pressure in the inert gas bottle is too low, the inert gas can be supplemented or replaced at any time, so that the operation is simple, the cost is low, and experimental consumables are saved. The gas storage circulation system can store generated gas; a pressure gauge is added on a headspace container in the gas storage circulation system, so that the initial pressure in the system and the pressure change in the experiment can be displayed to reflect the gas generation amount; and a advection pump is connected below the headspace container to provide circulating power for fluid in the system.
The invention simulates the temperature, pressure and hydrodynamic conditions of the stratum during in-situ microbial degradation; providing stratum reaction temperature through a water bath constant temperature system; regulating and simulating different stratum pressures through a pressure reducing valve of a high-pressure inert gas bottle; different water flow rates underground are simulated by means of the flow control of the advection pump.
The core sample with the diameter of 42cm can be placed in the biological reaction tank body, the block sample or the powdery sample can also be placed in the biological reaction tank body, and the application range of the sample is wider.
The instrument has simple operation method and low economic cost, and the simulation result is closer to the actual condition of the stratum.
The foregoing description is only an overview of the technical solution of the present invention, and in order to make the technical means of the present invention more clearly understood, it can be implemented according to the content of the specification, and the following detailed description of the preferred embodiments of the present invention will be given with reference to the accompanying drawings.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the embodiments will be briefly described below, and it is obvious 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 the structure of the present invention;
FIG. 2 is a schematic illustration of a bioreactor tank;
FIG. 3 is a schematic illustration of a headspace container;
FIG. 4 is a top plan view of the headspace container;
fig. 5 is a flow chart of the present invention.
In the figure: 1-a constant-temperature water bath box; 2-a biological reaction tank body; 3-headspace container; 4-a high-pressure inert gas bottle; 5-an inert gas bottle valve; 6-a gas pressure reducing valve; 7-a first connecting conduit; 8-a first two-way valve; 9-a second connecting conduit; 10-a first through hole; 11-a first sealing cover; 12-a first sealing gasket; 13-a second sealing gasket; 14-a second sealing cover; 15-a second through hole; 16-a second two-way valve; 17-a liquid outlet; 18-a third connecting conduit; 19-a filter; 20-fourth connecting conduit; 21-a pressure gauge; 22-a third two-way valve; 23-gas extraction port (containing sealing gasket); 24-exhaust port; 25-fourth two-way valve; 26-culture solution; 27-a advection pump; 28-fifth connecting duct.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Embodiment one:
an experimental device for the production of organic biogas shown in fig. 1-4 comprises a temperature control system, a microbial reaction system, a gas storage circulation system, a pressurizing and exhausting system, a first connecting pipe 7, a second connecting pipe 9 and a fourth connecting pipe 20; the gas storage circulation system at least comprises a headspace container 3, one end of the microbial reaction system enters the headspace container 3 through the upper surface of the headspace container 3 by a fourth connecting pipe 20, and the other end of the microbial reaction system is connected with the bottom of the gas storage circulation system by a second connecting pipe 9; the pressurizing and exhausting system is connected to the second connecting pipe 9 through the first connecting pipe 7; the microbial reaction system and the gas storage circulation system are arranged in the temperature control system.
In practical use, the microbial reaction system is a place for observing the reaction progress of microorganisms and organic matter samples. The microbial reaction system can be used for placing core samples with the diameter of 42mm, also can be used for placing block samples or powdery samples, and has wider application range. The gas storage circulation system is used for providing a place for storing the microorganism culture solution and the generated gas. The pressurizing and exhausting system is used for adjusting and controlling initial pressure in the experimental reaction in the system on one hand, and adjusting and controlling pressure change in the pressurizing and exhausting system before the experiment on the other hand, so that experimental safety is ensured. The temperature control system is used for controlling the experimental reaction temperature, and the influence of temperature factors on the biogas generation amount can be analyzed according to experimental data under different experimental conditions in the later stage.
The invention can obtain the influence of factors such as temperature, pressure, hydrodynamic force, microorganism type, microorganism quantity and the like on the output rate and total quantity of the biogas by controlling a variable method. The device can be repeatedly utilized for a plurality of times, so that the energy conservation and environmental protection are realized, and the efficiency maximization is achieved.
Embodiment two:
an experimental apparatus for biogas production of organic matter according to fig. 1 is different from the embodiment in that: the temperature control system adopts a water bath temperature control system.
Preferably, the water bath temperature control system adopts a constant-temperature water bath box 1.
In practical use, the water bath temperature control system consists of a large constant temperature water bath box 1. The water bath box is used for controlling the experimental reaction temperature, and the influence of temperature factors on the biogas generation amount can be analyzed according to experimental data under different experimental conditions in the later stage. The technical scheme of the constant-temperature water bath 1 is adopted, so that the connecting guide pipe is convenient to install and disassemble, the tightness (bubbles exist in the air leakage place) of the underwater inspectable device can be inspected by the biological reaction tank body and the headspace container in real time, and the temperature required by the reaction can be accurately controlled in the experimental process. The experiment is low in cost and good in temperature control effect. The model of the constant-temperature water bath box 1 adopted by the invention is SC-160, and a circulation system is arranged in the bath tank of the water bath box, so that the uniformity of a temperature field in the bath tank can be improved, and the temperature precision can reach 0.05 ℃ by adopting a PID temperature control technology. In practical use, other types of constant-temperature water bath boxes or temperature control devices can be adopted, so long as the temperature required by the reaction can be accurately controlled.
Embodiment III:
an experimental apparatus for biogas production from organic matter according to the embodiment shown in fig. 1 and 2 is different from the embodiment in that: the microbial reaction system at least comprises a biological reaction tank body 2, wherein one end of the biological reaction tank body 2 is detachably connected with a second sealing cover 14 through a second sealing gasket 13, the upper part of the second sealing cover 14 is connected with one end of a third conduit 18 through a second through hole 15 which is formed in the upper part of the second sealing cover 14, and the other end of the third conduit 18 is connected with a fourth connecting pipe 20 through a filter 19; the lower part of the second sealing cover 14 is provided with a liquid outlet 17; the other end of the biological reaction tank body 2 is detachably connected with a first sealing cover 11 through a first sealing gasket 12, the upper part of the first sealing cover 11 is connected with one end of a second connecting conduit 9 through a first through hole 10, and the other end of the second connecting conduit 9 is connected with the bottom of the headspace container 3 through a advection pump 27.
Preferably, a second two-way valve 16 is connected to the outside of the liquid outlet 17.
In practical use, the biological reaction tank 2 in the microbial reaction system is a place for observing the reaction progress of microorganisms and organic matter samples. The biological reaction tank body can be used for placing core samples with the diameter of 42mm, also can be used for placing block samples or powdery samples, and has wider application range. In the system, one side of the biological reaction tank body 2 is a sample inlet of a detachable first sealing cover 11 and a first sealing gasket 12, so that the reaction can be well sealed and convenient for sample exchange cleaning and recycling, and the other side is a detachable second sealing cover 14 and a second sealing gasket 13. The upper part of a first closed cover 11 on the biological reaction tank body 2 is provided with a first through hole 10 which is connected with a second connecting conduit 9, and a second through hole 15 which is arranged on the upper right side of the biological reaction tank body 2 is connected with a third conduit 18, so as to lead out reaction generated gas and microorganism culture solution. The third connecting duct 18 is connected to a filter 19 for filtering fine particles such as pulverized coal. The lower part of the biological reaction tank body 2 is provided with a liquid outlet 17, a second two-way valve 16 is added on the liquid outlet to control the sealing of the biological reaction tank body 2, and the liquid outlet is simultaneously used for taking liquid samples at any time during and after the experiment so as to detect the content change and the microbial activity change of the soluble substances in the process of degrading organic matters by the microorganisms. The two sides of the biological reaction tank body 2 are provided with the detachable sealing covers and the sealing gaskets, so that the tightness of experimental environment is ensured, and the cleaning work of experimental instruments in the preparation stage and the ending stage of the experiment is convenient; the right side of the biological reaction tank body is connected with a filter which can prevent fine particles such as coal dust and the like from entering the headspace container.
Embodiment four:
an experimental apparatus for biogas production of organic matter according to the embodiments shown in fig. 1, 3 and 4 is different from the embodiment in that: the gas storage circulation system also comprises a pressure gauge 21, a fifth connecting conduit 28, a fourth two-way valve 25 and a third two-way valve 22; the pressure gauge 21 is connected to the upper surface of the headspace container 3 through a third two-way valve 22, one end of the fifth connecting conduit 28 passes through the lower bottom surface of the headspace container 3 and extends into the headspace container 3, and the other end of the fifth connecting conduit 28 is connected with the second connecting conduit 9; the upper surface of the headspace container 3 is also provided with an air taking port 23 and an air exhausting port 24, and the air exhausting port 24 is connected with a fourth two-way valve 25.
In practical use, the headspace container 3 in the gas storage circulation system is a place for storing the microorganism culture solution and the generated gas, and in this embodiment, a cylindrical stainless steel container with a specification of 2L and an inner diameter of 100mm is used. In actual use, containers with different specifications can be adopted according to actual needs. Four openings are arranged at the upper part of the headspace container 3, and are respectively connected with a pressure gauge 21, a fourth connecting conduit 20, an air taking port 23 and an air exhaust port 24; the lower opening has a mouth for connection to the fifth connecting duct 28. The pressure gauge 21 is used for displaying the initial pressure of the experiment and detecting the volume change of the generated gas in the reaction process, so that the degree of the reaction and the gas generation amount can be known, and the influence of the influence factors such as the microorganism type, the content and the like on the generated gas rate can be obtained in the later stage. The fourth connecting conduit 20 is introduced into the culture solution in the headspace container 3 and is communicated with the microbial reaction system, so that on one hand, the connection pipeline and the air in the microbial culture solution are exhausted after the high-pressure inert gas bottle 4 is opened before an experiment, and on the other hand, the generation time and the quantity of the biogas are judged by observing the frequency of bubbles in the experiment process. The sealing gasket 23 arranged at the air taking port 23 is convenient for extracting the air in the headspace container through the injector in the experimental process. The exhaust port 24 is an air outlet for opening the high-pressure inert gas bottle to exhaust the air in the reaction system at the beginning of the experiment, and can also be used as an air collecting port for collecting a large amount of gas in the headspace container 3 by using an air collecting bag after the experiment is finished. The fifth connecting conduit 28 is internally connected with a advection pump 27, which can make the microorganism culture solution flow unidirectionally on the one hand, and can prevent inert gas from entering the headspace container when the inert gas is introduced in the preparation test stage. A fifth connecting conduit 28 opens into the microorganism culture liquid in the lower part of the headspace container. A headspace container 3 in the gas storage circulation system, which can store the generated gas; the pressure gauge is added on the headspace container 3, so that the initial pressure in the system and the pressure change in the experiment can be displayed to reflect the gas generation amount; and a advection pump is connected below the headspace container 3 to provide circulating power for fluid in the system.
Fifth embodiment:
an experimental apparatus for biogas production of organic matter according to fig. 1 is different from the embodiment in that: the pressurizing and exhausting system comprises a high-pressure inert gas bottle 4, an inert gas bottle valve 5, a gas pressure reducing valve 6 and a first two-way valve 8; the high-pressure inert gas bottle 4 is connected with the input end of the gas pressure reducing valve 6, the output end of the gas pressure reducing valve 6 is connected with the first connecting conduit 7, and the first two-way valve 8 is connected to the first connecting conduit 7.
It is preferable that the gas in the high-pressure inert gas bottle 4 is high-purity nitrogen.
In practical use, the gas in the high-pressure inert gas bottle 4 is high-purity inert gas, so as to remove air in the microbial reaction system, the gas storage circulation system and the second, third and fourth connecting pipes and create main gas of an anaerobic experiment environment. The gas pressure reducing valve 6 is used for adjusting the initial pressure of the experimental reaction in the control system on one hand and adjusting the pressure change of the high-pressure inert gas bottle 4 during the exhaust before the experiment on the other hand, so that the experimental safety is ensured. The first two-way valve 8 is connected to the first connecting conduit 7 on the side of the advection pump 27 for connecting the switches of the pressurization and exhaust system and other experimental systems. The pressurizing and exhausting system uses an external high-pressure inert gas bottle 4, a gas reducing valve 6 and a first two-way valve 8 to independently control the initial pressure and anaerobic environment in the system, and inert gas can be supplemented or replaced at any time when the pressure in the high-pressure inert gas bottle 4 is too low, so that the operation is simple, the cost is low, and experimental consumables are saved. The gas adopted in the high-pressure inert gas bottle 4 is high-purity nitrogen, so that the cost can be saved on the basis of no influence on experimental precision. In actual use, helium gas with high purity or other inert gases with high purity can be adopted according to the requirement, and the same experimental effect can be obtained.
Example six:
the experimental apparatus for biogas production from organic matter shown in fig. 1-4 is different from the second embodiment in that: the water bath temperature control system adopts a constant-temperature water bath box 1, the microbial reaction system at least comprises a biological reaction tank body 2, one end of the biological reaction tank body 2 is detachably connected with a second sealing cover 14 through a second sealing gasket 13, the upper part of the second sealing cover 14 is connected with one end of a third conduit 18 through a second through hole 15 which is arranged, and the other end of the third conduit 18 is connected with a fourth connecting pipe 20 through a filter 19; the lower part of the second sealing cover 14 is provided with a liquid outlet 17; the other end of the biological reaction tank body 2 is detachably connected with a first sealing cover 11 through a first sealing gasket 12, the upper part of the first sealing cover 11 is connected with one end of a second connecting conduit 9 through a first through hole 10, and the other end of the second connecting conduit 9 is connected with the bottom of the headspace container 3 through a advection pump 27; the outer side of the liquid outlet 17 is connected with a second two-way valve 16; the gas storage circulation system also comprises a pressure gauge 21, a fifth connecting conduit 28, a fourth two-way valve 25 and a third two-way valve 22; the pressure gauge 21 is connected to the upper surface of the headspace container 3 through a third two-way valve 22, one end of the fifth connecting conduit 28 passes through the lower bottom surface of the headspace container 3 and extends into the headspace container 3, and the other end of the fifth connecting conduit 28 is connected with the second connecting conduit 9; the upper surface of the headspace container 3 is also provided with an air taking port 23 and an air exhausting port 24, and the air exhausting port 24 is connected with a fourth two-way valve 25; the pressurizing and exhausting system comprises a high-pressure inert gas bottle 4, an inert gas bottle valve 5, a gas pressure reducing valve 6 and a first two-way valve 8; the high-pressure inert gas bottle 4 is connected with the input end of the gas pressure reducing valve 6, the output end of the gas pressure reducing valve 6 is connected with the first connecting conduit 7, and the first two-way valve 8 is connected to the first connecting conduit 7.
The invention simulates the temperature, pressure and hydrodynamic conditions of the stratum during in-situ microbial degradation; the water bath constant temperature system is used for providing stratum reaction temperature, the pressure reducing valve of the high-pressure inert gas bottle is used for adjusting and simulating different stratum pressures, and the advection pump flow control is used for simulating different underground water flow rates. The core sample with the diameter of 42cm can be placed in the biological reaction tank body, the block sample or the powdery sample can also be placed in the biological reaction tank body, and the application range of the sample is wider. The method is simple in operation, low in economic cost and more approximate to the actual condition of the stratum in simulation result.
Embodiment seven:
a method for testing the output of organic biological gas shown in figures 1 and 5 comprises the following steps of
Step one: implement sterilization treatment
Sterilizing the biological reaction tank 2, the headspace container 3, the culture solution 26, the detachable sealing covers 11 and 14, the filter 19, the first connecting conduit 7, the second connecting conduit 9, the third connecting conduit 18, the fourth connecting conduit 20, the fifth connecting conduit 28, the first two-way valve 8, the second two-way valve 16, the third two-way valve 22 and the fourth two-way valve 25;
step two: matching device
Placing the organic matter sample into the biological reaction tank body 2 treated in the first step, and filling the culture solution 26 into the headspace container 3 treated in the first step;
step three: device mounting
Connecting all the parts processed in the first step and the second step;
step four: starter device
Sequentially opening an inert gas bottle valve 5, a gas pressure reducing valve 6, a first two-way valve 8 and a fourth two-way valve 25 in a pressurizing and exhausting system, continuously introducing high-purity inert gas for 10-20 minutes, removing residual air in a microbial reaction system and a gas storage circulation system, closing the fourth two-way valve 25, regulating the gas pressure reducing valve 6 to set stratum pressure, closing the first two-way valve 8, the inert gas bottle valve 5 and the gas pressure reducing valve 6, and then opening a power switch of a constant-temperature water bath tank 1 and a advection pump 27 to enable a culture solution 26 in a headspace container 3 to circularly flow in a clockwise direction;
step five: collecting gas and liquid
Collecting the top end gas in the headspace container 3 from the gas-taking port 23 at different time periods; collecting the liquid in the bioreactor 2 from the liquid outlet 17;
sixth, detecting gas and liquid
And (3) detecting the gas components and the methane concentration of the gas collected in the step five, and analyzing the microorganism diversity of the liquid.
The invention well completes the microorganism gasification experiment through six steps of instrument sterilization treatment, matching device, device installation, starting device, gas and liquid collection and gas and liquid detection, and provides powerful technical support for experiments and researches.
Example eight:
a test method for the biogas production of organic matter as shown in figures 1 and 5,
firstly, a certain volume of culture solution 26 is prepared according to a methanogen culture solution method, a biological reaction tank 2, a headspace container 3, the culture solution 26, a first connecting conduit 7, a second connecting conduit 9, a third connecting conduit 18, a fourth connecting conduit 20, a fifth connecting conduit 28, a first two-way valve 8, a second two-way valve 16, a third two-way valve 22 and a fourth two-way valve 25 are placed into a high-temperature steam sterilization pot to be sterilized at 121 ℃ for 20 minutes, then the biological reaction tank is taken out after an experimental instrument is cooled, and the biological reaction tank is placed into a purification workbench to be loaded with samples and connected with each system.
Firstly, a core sample with the inner diameter of a certain mine being 42mm and the length being 300mm is put into a biological reaction tank body 2, then a detachable first sealing cover 11 and a second sealing cover 14 are respectively arranged on two sides of the biological reaction tank body 2, a filter 19 and a second through hole 15 are connected by a third connecting conduit 18, a pressure gauge 21, a sealing gasket 23, a third through valve and a fourth through valve of a headspace container are arranged, and finally a high-pressure inert gas bottle, the biological reaction tank body 2, the filter 19, the headspace container 3 and a advection pump 27 are connected by a first connecting conduit 7, a second connecting conduit 9, a third connecting conduit 18, a fourth connecting conduit 20 and a fifth connecting conduit 28 in sequence, so that the experimental device is assembled.
The specific experimental operation steps are as follows:
1. the fourth two-way valve 25, the first two-way valve 8, the inert gas bottle valve 5, and the gas pressure reducing valve 6 are opened in this order, and the inert gas is blown for 10 minutes by adjusting to an appropriate outlet flow pressure.
2. And exhausting the air in the microbial reaction system and the air storage circulation system, closing the fourth two-way valve 25, and regulating the outlet pressure of the gas reducing valve 6 to the stratum simulation pressure of 1MPa.
3. After the pressure in the system is balanced, the first two-way valve 8, the inert gas bottle valve 5 and the gas pressure reducing valve 6 are closed.
4. The water bath box switch adopted in the embodiment is opened, the temperature is adjusted to 35 ℃, the advection pump switch is opened, the flow speed is adjusted to 0.1ml/min, a certain amount of gas is extracted from the gas taking port 23 by using a syringe every 3-5 days for testing gas components, after the experimental device lasts for 60-90 days, the reaction is finished, the residual gas in the headspace container is collected from the gas outlet 24, and the residual liquid in the biological reaction tank body 2 is collected from the liquid outlet 17 for testing other projects.
5. After the experiment is finished, the water bath box and the power switch of the flow pump are sequentially closed, all experimental accessories are sequentially detached according to the steps of assembling an experimental instrument, and the experimental equipment is used for the next experiment after being cleaned.
In summary, according to the experimental device for producing the organic matter biogas, which is composed of the temperature control system, the microbial reaction system, the gas storage circulation system and the pressurizing and exhausting system, the experimental process can accurately control the temperature required by the reaction through six steps of instrument sterilization treatment, a matching device, device installation, a starting device, gas and liquid collection and gas and liquid detection, so that the experimental instrument cleaning work in the experimental preparation stage and the experimental instrument cleaning work in the ending stage are facilitated; the biological reaction tank body is connected with a filter, so that fine particles such as coal dust can be prevented from entering the headspace container; the pressurizing and exhausting system uses an external high-pressure inert gas bottle, a pressure reducing valve and a first two-way valve to independently control the initial pressure and anaerobic environment in the system, and when the pressure in the inert gas bottle is too low, the inert gas can be supplemented or replaced at any time, so that the operation is simple, the cost is low, and experimental consumables are saved. The gas storage circulation system can store generated gas; a pressure gauge is added on a headspace container in the gas storage circulation system, so that the initial pressure in the system and the pressure change in the experiment can be displayed to reflect the gas generation amount; and a advection pump is connected below the headspace container to provide circulating power for fluid in the system.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the invention.
It should be noted that all directional indications such as up, down, left, right, front, and rear … … in the embodiments of the present invention are merely used to explain the relative positional relationship, movement, etc. between the components in a particular posture such as that shown in the drawings, and if the particular posture is changed, the directional indication is changed accordingly.
Furthermore, the description of "first," "second," etc. in this disclosure is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature.
Under the condition of no conflict, the technical features related to the examples can be combined with each other according to actual situations by a person skilled in the art so as to achieve corresponding technical effects, and specific details of the combination situations are not described in detail herein.
While the preferred embodiments of the present invention have been described above, the present invention is not intended to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein. Any simple modification, equivalent variation and modification of the above embodiments according to the technical substance of the present invention still fall within the scope of the technical solution of the present invention.
Claims (1)
1. The experimental device comprises a temperature control system, a microbial reaction system, a gas storage circulation system, a pressurizing and exhausting system, a first connecting conduit (7), a second connecting conduit (9) and a fourth connecting conduit (20); the gas storage circulation system at least comprises a headspace container (3), one end of the microbial reaction system enters the headspace container (3) through the upper surface of the headspace container (3) by a fourth connecting conduit (20), and the other end of the microbial reaction system is connected with the bottom of the gas storage circulation system by a second connecting conduit (9); the supercharging and exhausting system is connected to the second connecting conduit (9) through the first connecting conduit (7); the microbial reaction system and the gas storage circulation system are arranged in the temperature control system; the temperature control system is a constant-temperature water bath box (1), the microbial reaction system at least comprises a biological reaction tank body (2), one end of the biological reaction tank body (2) is detachably connected with a second sealing cover (14) through a second sealing gasket (13), the upper part of the second sealing cover (14) is connected with one end of a third connecting conduit (18) through a second through hole (15) which is arranged on the upper part of the second sealing cover, and the other end of the third connecting conduit (18) is connected with a fourth connecting conduit (20) through a filter (19); the lower part of the second sealing cover (14) is provided with a liquid outlet (17); the other end of the biological reaction tank body (2) is detachably connected with a first sealing cover (11) through a first sealing gasket (12), the upper part of the first sealing cover (11) is connected with one end of a second connecting conduit (9) through a first through hole (10) arranged on the upper part of the first sealing cover, and the other end of the second connecting conduit (9) is connected with the bottom of the headspace container (3) through a advection pump (27); the outer side of the liquid outlet (17) is connected with a second two-way valve (16); the gas storage circulation system also comprises a pressure gauge (21), a fifth connecting conduit (28), a fourth two-way valve (25) and a third two-way valve (22); the pressure gauge (21) is connected to the upper surface of the headspace container (3) through a third two-way valve (22), one end of the fifth connecting conduit (28) penetrates through the lower bottom surface of the headspace container (3) and extends into the headspace container (3), and the other end of the fifth connecting conduit (28) is connected with the second connecting conduit (9); the upper surface of the top-empty container (3) is also provided with an air taking port (23) and an air exhaust port (24), and the air exhaust port (24) is connected with a fourth two-way valve (25); the pressurizing and exhausting system comprises a high-pressure inert gas bottle (4), an inert gas bottle valve (5), a gas pressure reducing valve (6) and a first two-way valve (8); the high-pressure inert gas bottle (4) is connected with the input end of the gas pressure reducing valve (6), the output end of the gas pressure reducing valve (6) is connected with the first connecting conduit (7), and the first two-way valve (8) is connected to the first connecting conduit (7); the method is characterized in that: comprises the following steps of
Step one: implement sterilization treatment
Sterilizing the biological reaction tank body (2), the headspace container (3), the culture solution (26), the first sealing cover (11), the second sealing cover (14), the filter (19), the first connecting conduit (7), the second connecting conduit (9), the third connecting conduit (18), the fourth connecting conduit (20), the fifth connecting conduit (28), the first two-way valve (8), the second two-way valve (16), the third two-way valve (22) and the fourth two-way valve (25);
step two: matching device
Placing an organic matter sample into the biological reaction tank body (2) treated in the first step, and filling a culture solution (26) into the headspace container (3) treated in the first step;
step three: device mounting
Connecting all the parts processed in the first step and the second step;
step four: starter device
Sequentially opening an inert gas bottle valve (5), a gas pressure reducing valve (6), a first two-way valve (8) and a fourth two-way valve (25) in the pressurizing and exhausting system, continuously introducing high-purity inert gas for 10-20 minutes, removing residual air in a microbial reaction system and a gas storage circulating system, closing the fourth two-way valve (25), adjusting the gas pressure reducing valve (6) to set stratum pressure, closing the first two-way valve (8), the inert gas bottle valve (5) and the gas pressure reducing valve (6), and then opening a power switch of a temperature control system and a advection pump (27) to enable a culture solution (26) in a headspace container (3) to circularly flow in a clockwise direction;
step five: collecting gas and liquid
Collecting the top end gas in the headspace container (3) from the gas outlet (23) at different time periods; collecting liquid in the biological reaction tank body (2) from a liquid outlet (17);
sixth, detecting gas and liquid
And (3) detecting the gas components and the methane concentration of the gas collected in the step five, and analyzing the microorganism diversity of the liquid.
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| CN110542018B (en) * | 2019-09-04 | 2024-05-07 | 北京国科环宇科技股份有限公司 | Pressurization experiment system and implementation method |
| CN110964661A (en) * | 2019-11-13 | 2020-04-07 | 西南石油大学 | Method for simulating early degradation of organic matters in microbial rock |
| CN114778792B (en) * | 2022-06-24 | 2022-09-23 | 中国煤炭地质总局勘查研究总院 | Biological yield increase experimental system for coal bed gas |
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