CN110106068B - Large and medium-sized coal anaerobic fermentation layered heating experimental device and experimental method thereof - Google Patents
Large and medium-sized coal anaerobic fermentation layered heating experimental device and experimental method thereof Download PDFInfo
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- CN110106068B CN110106068B CN201910459193.XA CN201910459193A CN110106068B CN 110106068 B CN110106068 B CN 110106068B CN 201910459193 A CN201910459193 A CN 201910459193A CN 110106068 B CN110106068 B CN 110106068B
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- 238000000855 fermentation Methods 0.000 title claims abstract description 54
- 239000003245 coal Substances 0.000 title claims abstract description 27
- 238000010438 heat treatment Methods 0.000 title claims abstract description 18
- 238000002474 experimental method Methods 0.000 title claims abstract description 11
- 239000000463 material Substances 0.000 claims abstract description 56
- 230000000903 blocking effect Effects 0.000 claims abstract description 54
- 230000004151 fermentation Effects 0.000 claims abstract description 37
- 238000004519 manufacturing process Methods 0.000 claims abstract description 15
- 238000000605 extraction Methods 0.000 claims abstract description 11
- 238000003756 stirring Methods 0.000 claims abstract description 6
- 239000007789 gas Substances 0.000 claims description 55
- 239000007788 liquid Substances 0.000 claims description 46
- 238000005086 pumping Methods 0.000 claims description 21
- 239000000203 mixture Substances 0.000 claims description 14
- 241000894006 Bacteria Species 0.000 claims description 13
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 12
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 12
- 239000002817 coal dust Substances 0.000 claims description 12
- 230000000694 effects Effects 0.000 claims description 8
- 238000007789 sealing Methods 0.000 claims description 7
- 229910052786 argon Inorganic materials 0.000 claims description 6
- 238000005260 corrosion Methods 0.000 claims description 6
- 230000007797 corrosion Effects 0.000 claims description 6
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 6
- 229910052757 nitrogen Inorganic materials 0.000 claims description 6
- 238000012360 testing method Methods 0.000 claims description 6
- 230000001580 bacterial effect Effects 0.000 claims description 5
- 230000005540 biological transmission Effects 0.000 claims description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 3
- 239000003153 chemical reaction reagent Substances 0.000 claims description 3
- 239000003034 coal gas Substances 0.000 claims description 3
- 239000001257 hydrogen Substances 0.000 claims description 3
- 229910052739 hydrogen Inorganic materials 0.000 claims description 3
- 239000012774 insulation material Substances 0.000 claims description 3
- 238000004321 preservation Methods 0.000 claims description 2
- 238000013461 design Methods 0.000 abstract description 3
- 238000011161 development Methods 0.000 description 3
- 238000011160 research Methods 0.000 description 3
- 238000004140 cleaning Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000002146 bilateral effect Effects 0.000 description 1
- 238000005056 compaction Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009533 lab test Methods 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12M—APPARATUS FOR ENZYMOLOGY OR MICROBIOLOGY; APPARATUS FOR CULTURING MICROORGANISMS FOR PRODUCING BIOMASS, FOR GROWING CELLS OR FOR OBTAINING FERMENTATION OR METABOLIC PRODUCTS, i.e. BIOREACTORS OR FERMENTERS
- C12M21/00—Bioreactors or fermenters specially adapted for specific uses
- C12M21/04—Bioreactors or fermenters specially adapted for specific uses for producing gas, e.g. biogas
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- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12M—APPARATUS FOR ENZYMOLOGY OR MICROBIOLOGY; APPARATUS FOR CULTURING MICROORGANISMS FOR PRODUCING BIOMASS, FOR GROWING CELLS OR FOR OBTAINING FERMENTATION OR METABOLIC PRODUCTS, i.e. BIOREACTORS OR FERMENTERS
- C12M23/00—Constructional details, e.g. recesses, hinges
- C12M23/34—Internal compartments or partitions
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- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12M—APPARATUS FOR ENZYMOLOGY OR MICROBIOLOGY; APPARATUS FOR CULTURING MICROORGANISMS FOR PRODUCING BIOMASS, FOR GROWING CELLS OR FOR OBTAINING FERMENTATION OR METABOLIC PRODUCTS, i.e. BIOREACTORS OR FERMENTERS
- C12M23/00—Constructional details, e.g. recesses, hinges
- C12M23/36—Means for collection or storage of gas; Gas holders
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- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12M—APPARATUS FOR ENZYMOLOGY OR MICROBIOLOGY; APPARATUS FOR CULTURING MICROORGANISMS FOR PRODUCING BIOMASS, FOR GROWING CELLS OR FOR OBTAINING FERMENTATION OR METABOLIC PRODUCTS, i.e. BIOREACTORS OR FERMENTERS
- C12M27/00—Means for mixing, agitating or circulating fluids in the vessel
- C12M27/18—Flow directing inserts
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- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12M—APPARATUS FOR ENZYMOLOGY OR MICROBIOLOGY; APPARATUS FOR CULTURING MICROORGANISMS FOR PRODUCING BIOMASS, FOR GROWING CELLS OR FOR OBTAINING FERMENTATION OR METABOLIC PRODUCTS, i.e. BIOREACTORS OR FERMENTERS
- C12M29/00—Means for introduction, extraction or recirculation of materials, e.g. pumps
- C12M29/20—Degassing; Venting; Bubble traps
- C12M29/22—Oxygen discharge
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- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12M—APPARATUS FOR ENZYMOLOGY OR MICROBIOLOGY; APPARATUS FOR CULTURING MICROORGANISMS FOR PRODUCING BIOMASS, FOR GROWING CELLS OR FOR OBTAINING FERMENTATION OR METABOLIC PRODUCTS, i.e. BIOREACTORS OR FERMENTERS
- C12M39/00—Means for cleaning the apparatus or avoiding unwanted deposits of microorganisms
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- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12M—APPARATUS FOR ENZYMOLOGY OR MICROBIOLOGY; APPARATUS FOR CULTURING MICROORGANISMS FOR PRODUCING BIOMASS, FOR GROWING CELLS OR FOR OBTAINING FERMENTATION OR METABOLIC PRODUCTS, i.e. BIOREACTORS OR FERMENTERS
- C12M41/00—Means for regulation, monitoring, measurement or control, e.g. flow regulation
- C12M41/12—Means for regulation, monitoring, measurement or control, e.g. flow regulation of temperature
- C12M41/18—Heat exchange systems, e.g. heat jackets or outer envelopes
- C12M41/22—Heat exchange systems, e.g. heat jackets or outer envelopes in contact with the bioreactor walls
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- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12P—FERMENTATION OR ENZYME-USING PROCESSES TO SYNTHESISE A DESIRED CHEMICAL COMPOUND OR COMPOSITION OR TO SEPARATE OPTICAL ISOMERS FROM A RACEMIC MIXTURE
- C12P3/00—Preparation of elements or inorganic compounds except carbon dioxide
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- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12P—FERMENTATION OR ENZYME-USING PROCESSES TO SYNTHESISE A DESIRED CHEMICAL COMPOUND OR COMPOSITION OR TO SEPARATE OPTICAL ISOMERS FROM A RACEMIC MIXTURE
- C12P5/00—Preparation of hydrocarbons or halogenated hydrocarbons
- C12P5/02—Preparation of hydrocarbons or halogenated hydrocarbons acyclic
- C12P5/023—Methane
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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
Abstract
Large and medium-sized coal anaerobic fermentation layered heating experimental device comprises a tank body, wherein a blanking cylinder is arranged at the top of the tank body, a tank cover is arranged at the top of the blanking cylinder, a horizontal push-pull material blocking mechanism is arranged at the lower part of the blanking cylinder, an enrichment culture area is arranged inside the blanking cylinder, a plurality of gas conveying ports are arranged at the top of the tank body, a circulation guide cylinder which is concentric with the tank body is arranged inside the tank body, a mixed gas production area is arranged inside the tank body, and a first gas extraction port and a second gas extraction port are respectively arranged at the edge of the top of the tank body and on the upper part of the blanking cylinder. The invention also discloses an experimental method of the large and medium-sized coal anaerobic fermentation layered heating experimental device. The invention has scientific principle and reasonable design, and the whole fermentation process is kept uniformly heated; the mixed gas producing area and the enrichment culture area are combined into one, so that the interference of external air is avoided to the greatest extent; and a gas pressurizing circulating stirring device is adopted, so that a second guarantee is provided for uniform heating in the fermentation process.
Description
Technical Field
The invention belongs to the technical field of coal seam bioenergy development, and particularly relates to a large and medium-sized coal anaerobic fermentation layered heating experimental device and an experimental method thereof.
Background
The development of the biological energy of the coal bed has important significance for clean utilization of coal resources, effective improvement of coal and rock reservoirs and supplement of the gas content of the coal bed, and is an important research field of coal engineering. At present, static simulated gas production experiments of small samples under laboratory conditions are generally involved, but little research is still carried out on medium-to-large-scale fermentation simulation experiments. The medium-sized dynamic fermentation simulation experiment is an intermediate step and a necessary path for realizing large-scale commercial development of coal seam bioenergy, but the expansion of equipment can lead to the increase of research and development cost and research technical difficulty, and simultaneously, new requirements including temperature, experimental materials and the like are put forward for the reactor. The conventional static simulator can uniformly heat the whole reaction device and the reaction mixed sample in the constant-temperature culture tank due to small fermentation sample amount and shallow coal sample stacking compaction degree, but the existence of a large-capacity sample in a medium-sized or large-sized fermentation device is difficult to uniformly heat, so that the fermentation temperature of the upper, middle and lower areas of the mixed sample is inconsistent, and the experiment is difficult to effectively and stably run.
Disclosure of Invention
The invention aims to solve the defects in the prior art, and provides a large and medium-sized coal anaerobic fermentation layered heating experimental device and an experimental method thereof, which can realize uniform heating of mixed samples in a medium-sized or large-sized fermentation device and are beneficial to continuous and effective operation of fermentation reaction.
In order to solve the technical problems, the invention adopts the following technical scheme: the large and medium-sized coal anaerobic fermentation layered heating experimental device comprises a cylindrical tank body, wherein the central line of the tank body is arranged in the vertical direction, a blanking cylinder which is communicated with the inside of the tank body and is coaxial with the central line is fixedly arranged at the top of the tank body, a tank cover is arranged at the top of the blanking cylinder, a left horizontal push-pull type material blocking mechanism and a right horizontal push-pull type material blocking mechanism which are symmetrically arranged left and right are arranged at the lower part of the blanking cylinder, an enrichment culture area is arranged inside the blanking cylinder, a plurality of gas conveying ports are arranged at the top of the tank body in the circumferential direction, a bracket is arranged at the bottom of the tank body under the blanking cylinder, a circulating guide cylinder which is coaxial with the tank body is arranged on the bracket, and circulating through holes are respectively formed in the circumferences of an upper port and a lower port of the circulating guide cylinder and the top and the bottom of the tank body; a circulating channel is formed between the circumference of the side wall of the tank body and the outer circle of the circulating guide cylinder, the gas transmission port is positioned right above the circulating channel, a mixed gas production area is arranged in the tank body, and a first gas extraction port and a second gas extraction port are respectively arranged at the edge of the top of the tank body and on the upper part of the blanking cylinder.
The tank body bottom and the circumference lateral part are all bilayer structure, are provided with the tubular heater between bilayer structure, bilayer structure's outside is provided with thermal insulation material, and the circumference lateral part inner wall of the tank body is provided with infrared temperature monitor, and infrared temperature monitor passes through temperature control switch and is connected with the tubular heater.
The top and the upper side part in the tank body are provided with a plurality of high-pressure nozzles; the bottom of the tank body is provided with a supporting wheel;
the bottom of the tank body is provided with a liquid outlet, a gathering hopper with a thick upper part and a thin lower part is arranged in the liquid outlet, the top of the gathering hopper is provided with a uniformly distributed filter screen, the lower end of the gathering hopper is connected with a liquid outlet pipe, and a liquid outlet valve is arranged on the liquid outlet pipe.
The upper port of the circulation guide cylinder is of a horn mouth structure with a thick upper part and a thin lower part, and the lower port of the circulation guide cylinder is of a horn mouth structure with a thick lower part and a thin upper part.
The cross section of the blanking cylinder is of a rectangular structure, the left side and the right side of the lower part of the blanking cylinder are provided with long strip-shaped guide holes along the front-rear horizontal direction, and the two long strip-shaped guide holes are symmetrically arranged left and right;
the left horizontal push-pull type material blocking mechanism comprises a front support plate, a rear support plate and a baffle plate; the baffle level sets up and slides and wear to establish in left rectangular shape guide hole, preceding extension board and back extension board set up in the outside left side of feed cylinder and be located the front side and the rear side of baffle respectively, preceding extension board and back extension board lower extreme are fixed at jar body top, preceding extension board rear side and back extension board front side all rotate and are equipped with two upper and lower symmetrical arrangement's guide pulley, baffle upper surface and lower surface are respectively with the guide pulley roll connection of upper portion and lower part, the width of baffle along the fore-and-aft direction, the length of rectangular shape guide hole and the inside length of feed cylinder along the fore-and-aft horizontal direction of feed cylinder are equal, all be equipped with on the feed cylinder around rectangular shape guide hole with baffle sliding seal complex fixed corrosion-resistant sealing strip, baffle front side and rear side all are provided with respectively with feed cylinder front side inner wall and rear side inner wall sliding seal complex activity corrosion-resistant sealing strip, the left side of baffle is provided with the push handle.
The baffle right side edge of the left horizontal push-pull type material blocking mechanism is provided with a limiting rib with the thickness smaller than that of the baffle, the baffle left side edge of the right horizontal push-pull type material blocking mechanism is provided with a limiting groove along the length direction, the baffle right side edge of the left horizontal push-pull type material blocking mechanism and the baffle left side edge of the right horizontal push-pull type material blocking mechanism are correspondingly contacted in the enrichment culture area, and the limiting rib stretches into and is assembled in the limiting groove.
The experimental method of the large and medium-sized coal anaerobic fermentation layered heating experimental device comprises the following steps,
(1) Opening the tank cover, the left horizontal push-pull type material blocking mechanism and the right horizontal push-pull type material blocking mechanism, pouring the processed coal dust into a mixed gas production area in the tank body through an upper port of the blanking cylinder, and then closing the left horizontal push-pull type material blocking mechanism and the right horizontal push-pull type material blocking mechanism, wherein an enrichment culture area and the mixed gas production area are separated;
(2) Adding a reagent and a source bacterial source required by bacterial liquid enrichment into an enrichment culture area through an upper port of a blanking barrel, and then closing a tank cover;
(3) Air in the enrichment culture area is pumped out through the second pumping hole, when the air pressure in the enrichment culture area reaches 0.08 MPa, the pumping is finished, the second pumping hole is closed, and the gas-producing bacteria liquid is enriched and cultured for 4-5 days;
(4) Starting the tubular heater, when the temperature of the tubular heater at the bottom of the tank body reaches or exceeds a preset temperature value, the preset temperature value is 35 ℃, the temperature control switch is turned off and starts to keep constant temperature, and meanwhile the tubular heater at the bottom of the tank body is turned off, and the tubular heater at the circumferential side part of the tank body starts to be started;
(5) After the temperature between the upper area and the lower area in the fermentation tank reaches a preset value and is stable, opening a left horizontal push-pull type material blocking mechanism and a right horizontal push-pull type material blocking mechanism to enable enriched gas-producing bacteria liquid to smoothly flow into a mixed gas producing area, closing the left horizontal push-pull type material blocking mechanism and the right horizontal push-pull type material blocking mechanism, pumping out air in the mixed gas producing area through a first pumping hole, and closing the first pumping hole after pumping out air when the air pressure in the mixed gas producing area reaches 0.08 MPa;
(6) High-pressure nitrogen or argon is introduced into the tank body through a plurality of gas transmission ports formed in the top of the tank body along the circumferential direction, the high-pressure nitrogen or argon firstly blows coal downwards through a circulating channel formed between the circumference of the side wall of the tank body and the outer circle of the circulating guide cylinder, coal dust enters the circulating guide cylinder inwards through a through hole formed between the lower end of the circulating guide cylinder and the bottom of the tank body, then moves upwards along the circulating guide cylinder, and finally enters the circulating channel outwards through a circulating through hole formed between the upper end of the circulating guide cylinder and the top of the tank body, so that continuous or intermittent circulating stirring of coal dust and gas-producing bacteria liquid is realized, and the coal dust and the gas-producing bacteria are uniformly mixed to form a fermentation mixture;
(7) Continuously fermenting the fermentation mixture in the tank for 25-35 days, taking out the fermented gas through the first extraction opening every 1-3 days during the period, and testing the content of methane and hydrogen in the fermented gas; simultaneously opening a liquid discharge valve at intervals of 1-3 days, taking out fermentation liquid generated by fermentation through a liquid discharge pipe, and analyzing and testing the fermentation liquid;
(8) After anaerobic fermentation is completed, a liquid discharge valve is opened, high-pressure water is sprayed into the tank body through a high-pressure nozzle, and simultaneously, air is introduced into the tank body through a plurality of air delivery ports formed in the top of the tank body along the circumferential direction, so that fermentation mixture in the tank body and residues attached to the inner wall of the tank body are washed away and discharged through a liquid discharge pipe.
The specific process of opening the left horizontal push-pull type material blocking mechanism and the right horizontal push-pull type material blocking mechanism in the step (1) is that two operators hold a left push-pull handle and a right push-pull handle, pull the left push-pull handle leftwards and pull the right push-pull handle rightwards, a limit rib is separated from a limit groove, a left baffle moves leftwards and a right baffle moves rightwards and horizontally, so that a mixed gas production area and an enrichment culture area are communicated up and down, and a guide wheel at the upper part and a guide wheel at the lower part play a guide and support role in the process of horizontally moving the baffle.
By adopting the technical scheme, the invention has the following technical effects:
(1) The supporting wheel is provided with the locking structure, the supporting wheel can be locked in laboratory experiments, and the locking structure of the supporting wheel can be unlocked when the supporting wheel needs to move so as to push the tank body to move;
(2) The upper port of the circulation guide cylinder is of a horn mouth structure with a thick upper part and a thin lower part, and the lower port of the circulation guide cylinder is of a horn mouth structure with a thick lower part and a thin upper part, so that the structure plays a role in guiding air flow, and is convenient for carrying pulverized coal by high-pressure air flow to carry out high-speed circulation stirring operation;
(3) According to the invention, the blanking barrel and the tank body are designed into a whole, the design is more reasonable, the structure is more compact, and the left horizontal push-pull type material blocking mechanism and the right horizontal push-pull type material blocking mechanism are arranged to separate the tank body from the blanking barrel, namely, the enrichment culture area and the mixed gas production area are separated, so that the experimental time is shortened;
(4) The structure of the baffle plate in the blanking barrel is a cantilever structure, so that the guide wheel has good guiding and sliding effects, the baffle plate is positioned, and the matched structure of the limit rib and the limit groove has good sealing effect, and the baffle plate on the left side and the baffle plate on the right side are positioned and connected into a whole, so that the baffle plate has good supporting and compression resisting effects;
(5) The bottom and the circumferential side parts of the tank body are of double-layer structures, so that the tank is used for installing a tubular heater and has good heat preservation effect;
(6) Finally, when the fermentation mixture in the tank body is cleaned, air is introduced into the tank body through the air delivery port, so that the effect of cleaning is prevented from being influenced by accumulation of the fermentation mixture; the uniformly distributed filter screen can prevent a large amount of fermentation mixture from entering the hopper to block the liquid discharge pipe when the fermentation mixture is cleaned.
In conclusion, the principle of the invention is scientific and the design is reasonable, and the tubular heater adopts layered heating to keep the whole fermentation process heated uniformly; the mixed gas producing area and the enrichment culture area are combined into one, so that the interference of external air is avoided to the greatest extent; the gas pressurizing circulating stirring device is adopted, so that a second guarantee is provided for uniform heating in the fermentation process; when the fermentation mixture is cleaned, the high-pressure water is adopted to clean, so that residues on the inner wall of the tank body are washed and cleaned seamlessly, and meanwhile, the inconvenience and difficulty brought by manual cleaning are reduced.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a left side view of the left horizontal push-pull dam mechanism of FIG. 1;
fig. 3 is an enlarged view at a in fig. 1.
Detailed Description
As shown in fig. 1, 2 and 3, the large and medium-sized coal anaerobic fermentation layered heating experimental device comprises a cylindrical tank body 1, wherein the central line of the tank body 1 is arranged in the vertical direction, a blanking cylinder 2 which is communicated with the inside of the tank body 1 and is coaxial with the central line is fixedly arranged at the top of the tank body 1, a tank cover 3 is arranged at the top of the blanking cylinder 2, a left horizontal push-pull material blocking mechanism and a right horizontal push-pull material blocking mechanism which are arranged in a bilateral symmetry manner are arranged at the lower part of the blanking cylinder 2, an enrichment culture area 4 is arranged in the blanking cylinder 2, a plurality of gas conveying ports 5 are arranged at the top of the tank body 1 in the circumferential direction, a bracket 6 is arranged at the inner bottom of the tank body 1 under the blanking cylinder 2, a circulating guide cylinder 7 which is coaxial with the tank body 1 is arranged on the bracket 6, and circulating through holes are respectively arranged at the upper port and the lower port of the circulating guide cylinder 7 in the circumferential direction of the top and the bottom of the tank body 1; a circulation channel is formed between the circumference of the side wall of the tank body 1 and the outer circle of the circulation guide cylinder 7, the gas transmission port 5 is positioned right above the circulation channel, a mixed gas production area 28 is arranged in the tank body 1, and a first gas extraction port 8 and a second gas extraction port 9 are respectively arranged at the edge of the top of the tank body 1 and on the upper part of the blanking cylinder 2.
The tank body 1 bottom and circumference lateral part all bilayer structure is provided with tubular heater 10 between the bilayer structure, and bilayer structure's outside is provided with thermal insulation material, and the circumference lateral part inner wall of tank body 1 is provided with infrared temperature monitor 11, and infrared temperature monitor 11 passes through temperature control switch 12 and is connected with tubular heater 10.
A plurality of high-pressure nozzles 13 are arranged at the top and the upper side part in the tank body 1; the bottom of the tank body 1 is provided with a supporting wheel 14;
the bottom of the tank body 1 is provided with a liquid outlet 15, a collecting hopper 16 with thick upper part and thin lower part is arranged in the liquid outlet 15, a uniformly distributed filter screen 17 is arranged at the top of the collecting hopper 16, the lower end of the collecting hopper 16 is connected with a liquid outlet pipe 18, and a liquid outlet valve 19 is arranged on the liquid outlet pipe 18.
The upper port of the circulation guide cylinder 7 is a horn mouth structure 20 with a thick upper part and a thin lower part, and the lower port of the circulation guide cylinder 7 is a horn mouth structure 20 with a thick lower part and a thin upper part.
The cross section of the blanking barrel 2 is of a rectangular structure, the left side and the right side of the lower part of the blanking barrel 2 are provided with long strip-shaped guide holes along the front-back horizontal direction, and the two long strip-shaped guide holes are symmetrically arranged left and right;
the left horizontal push-pull type material blocking mechanism comprises a front support plate 21, a rear support plate 22 and a baffle plate 23; the baffle 23 is horizontally arranged and slides and wears to establish in left rectangular shape guide hole, preceding extension board 21 and back extension board 22 set up in the outside left side of feed cylinder 2 and are located the front side and the rear side of baffle 23 respectively, preceding extension board 21 and back extension board 22 lower extreme are fixed at jar body 1 top, preceding extension board 21 rear side and back extension board 22 front side all rotate and are equipped with two upper and lower symmetrical arrangement's guide pulley 24, baffle 23 upper surface and lower surface respectively with upper portion's guide pulley 24 and lower part's guide pulley 24 roll connection, the width of baffle 23 along the fore-and-aft direction, the length of rectangular shape guide hole and the inside length along the fore-and-aft horizontal direction of feed cylinder 2 are equal, all be equipped with the fixed corrosion-resistant sealing strip with baffle 23 sliding seal cooperation on feed cylinder 2 all around rectangular shape guide hole, baffle 23 front side and rear side all are provided with the movable corrosion-resistant sealing strip with feed cylinder 2 front side inner wall and rear side inner wall sliding seal cooperation respectively, the left side of baffle 23 is provided with pushing handle 25.
The right side edge of the baffle plate 23 of the left horizontal push-pull type material blocking mechanism is provided with a limiting rib 26 with the thickness smaller than that of the baffle plate 23, the left side edge of the baffle plate 23 of the right horizontal push-pull type material blocking mechanism is provided with a limiting groove 27 along the length direction, the right side edge of the baffle plate 23 of the left horizontal push-pull type material blocking mechanism and the left side edge of the baffle plate 23 of the right horizontal push-pull type material blocking mechanism are correspondingly contacted in the enrichment culture area 4, and the limiting rib 26 stretches into and is assembled in the limiting groove 27.
The experimental method of the large and medium-sized coal anaerobic fermentation layered heating experimental device comprises the following steps:
(1) Opening the tank cover 3, the left horizontal push-pull type material blocking mechanism and the right horizontal push-pull type material blocking mechanism, pouring the processed coal dust into the mixed gas production area 28 in the tank body 1 through the upper port of the blanking cylinder 2, and then closing the left horizontal push-pull type material blocking mechanism and the right horizontal push-pull type material blocking mechanism, wherein the enrichment culture area 4 and the mixed gas production area 28 are separated;
(2) Adding a reagent and a source bacteria source required by bacterial liquid enrichment into an enrichment culture area 4 through an upper port of a blanking barrel 2, and then closing a tank cover 3;
(3) Air in the enrichment culture area 4 is pumped out through the second pumping hole 9, when the air pressure in the enrichment culture area 4 reaches 0.08 MPa, the pumping is finished, the second pumping hole 9 is closed, and the gas-producing bacteria liquid is enriched and cultured for 4-5 days;
(4) Starting the tubular heater 10, when the temperature of the tubular heater 10 at the bottom of the tank body 1 reaches or exceeds a preset temperature value, the preset temperature value is 35 ℃, the temperature control switch 12 is turned off and starts to keep constant temperature, meanwhile, the tubular heater 10 at the bottom of the tank body 1 is turned off, and the tubular heater 10 at the circumferential side part of the tank body 1 starts to be started;
(5) After the temperature between the upper area and the lower area in the fermentation tank reaches a preset value and is stable, opening a left horizontal push-pull type material blocking mechanism and a right horizontal push-pull type material blocking mechanism to enable enriched gas-producing bacteria liquid to smoothly flow into the mixed gas producing area 28, closing the left horizontal push-pull type material blocking mechanism and the right horizontal push-pull type material blocking mechanism, pumping out air in the mixed gas producing area 28 through a first pumping hole 8, and closing the first pumping hole 8 after the pumping is finished when the air pressure in the mixed gas producing area 28 reaches 0.08 MPa;
(6) High-pressure nitrogen or argon is introduced into the tank body 1 through a plurality of air delivery ports 5 formed in the top of the tank body 1 along the circumferential direction, the high-pressure nitrogen or argon firstly blows coal downwards through a circulating channel formed between the circumference of the side wall of the tank body 1 and the outer circle of the circulating guide cylinder 7, coal dust enters the circulating guide cylinder 7 inwards through a through hole formed between the lower end of the circulating guide cylinder 7 and the bottom of the tank body 1, then moves upwards along the circulating guide cylinder 7, and finally enters the circulating channel outwards through a circulating through hole formed between the upper end of the circulating guide cylinder 7 and the top of the tank body 1, so that continuous or intermittent circulating stirring of coal dust and gas-producing bacteria liquid is realized, and the coal dust and the gas-producing bacteria are uniformly mixed to form a fermentation mixture; the arrows in fig. 1 point to the circulation direction when the pulverized coal is circularly stirred for the high-pressure air flow;
(7) Continuously fermenting the fermentation mixture in the tank body 1 for 25-35 days, taking out fermented gas through the first extraction opening 8 every 1-3 days during the period, and testing the content of methane and hydrogen in the fermented gas; simultaneously, a liquid discharge valve 19 is opened at intervals of 1-3 days, fermentation liquid generated by fermentation is taken out through a liquid discharge pipe 18, and analysis and test are carried out on the fermentation liquid;
(8) After anaerobic fermentation is completed, the liquid discharge valve 19 is opened, high-pressure water is sprayed into the tank body 1 through the high-pressure nozzle 13, and simultaneously, air is introduced into the tank body 1 through a plurality of air delivery ports 5 arranged at the top of the tank body 1 along the circumferential direction, so that fermentation mixture in the tank body 1 and residues attached to the inner wall of the tank body 1 are washed away and discharged through the liquid discharge pipe 18.
The specific process of opening the left horizontal push-pull type material blocking mechanism and the right horizontal push-pull type material blocking mechanism in the step (1) is that two operators hold the left push-pull handle 25 and the right push-pull handle 25, pull the left push-pull handle 25 leftwards and pull the right push-pull handle 25 rightwards, the limit ribs 26 are separated from the limit grooves 27, the left baffle 23 moves leftwards and horizontally, the right baffle 23 moves rightwards and horizontally, so that the mixed gas production area 28 is communicated with the enrichment culture area 4 up and down, and the upper guide wheel 24 and the lower guide wheel 24 play a guiding and supporting role in the horizontal movement process of the baffle 23.
The present embodiment is not limited in any way by the shape, material, structure, etc. of the present invention, and any simple modification, equivalent variation and modification made to the above embodiments according to the technical substance of the present invention are all included in the scope of protection of the technical solution of the present invention.
Claims (4)
1. Large and medium-sized coal anaerobic fermentation layered heating experimental device is characterized in that: the device comprises a cylindrical tank body, wherein the central line of the tank body is arranged along the vertical direction, a blanking cylinder which is communicated with the inside of the tank body and is coaxial with the central line is fixedly arranged at the top of the tank body, a tank cover is arranged at the top of the blanking cylinder, a left horizontal push-pull material blocking mechanism and a right horizontal push-pull material blocking mechanism which are symmetrically arranged left and right are arranged at the lower part of the blanking cylinder, an enrichment culture area is arranged inside the blanking cylinder, a plurality of gas conveying ports are arranged at the top of the tank body along the circumferential direction, a bracket is arranged at the bottom of the tank body right below the blanking cylinder, a circulating guide cylinder which is coaxial with the tank body is arranged on the bracket, and circulating through holes are respectively formed in the circumferential directions of an upper port and a lower port of the circulating guide cylinder and the top and the bottom of the tank body; a circulation channel is formed between the circumference of the side wall of the tank body and the outer circle of the circulation guide cylinder, the gas transmission port is positioned right above the circulation channel, a mixed gas production area is arranged in the tank body, and a first gas extraction port and a second gas extraction port are respectively arranged at the edge of the top of the tank body and the upper part of the blanking cylinder;
the bottom of the tank body and the side part of the circumference are of double-layer structures, a tubular heater is arranged between the double-layer structures, a heat preservation and insulation material is arranged outside the double-layer structures, an infrared temperature monitor is arranged on the inner wall of the side part of the circumference of the tank body, and the infrared temperature monitor is connected with the tubular heater through a temperature control switch;
the top and the upper side part in the tank body are provided with a plurality of high-pressure nozzles; the bottom of the tank body is provided with a supporting wheel;
the bottom of the tank body is provided with a liquid outlet, a gathering hopper with a thick upper part and a thin lower part is arranged in the liquid outlet, the top of the gathering hopper is provided with a uniformly distributed filter screen, the lower end of the gathering hopper is connected with a liquid outlet pipe, and a liquid outlet valve is arranged on the liquid outlet pipe;
the upper port of the circulation guide cylinder is of a horn mouth structure with a thick upper part and a thin lower part, and the lower port of the circulation guide cylinder is of a horn mouth structure with a thick lower part and a thin upper part;
the cross section of the blanking cylinder is of a rectangular structure, the left side and the right side of the lower part of the blanking cylinder are provided with long strip-shaped guide holes along the front-rear horizontal direction, and the two long strip-shaped guide holes are symmetrically arranged left and right;
the left horizontal push-pull type material blocking mechanism comprises a front support plate, a rear support plate and a baffle plate; the baffle level sets up and slides and wear to establish in left rectangular shape guide hole, preceding extension board and back extension board set up in the outside left side of feed cylinder and be located the front side and the rear side of baffle respectively, preceding extension board and back extension board lower extreme are fixed at jar body top, preceding extension board rear side and back extension board front side all rotate and are equipped with two upper and lower symmetrical arrangement's guide pulley, baffle upper surface and lower surface are respectively with the guide pulley roll connection of upper portion and lower part, the width of baffle along the fore-and-aft direction, the length of rectangular shape guide hole and the inside length of feed cylinder along the fore-and-aft horizontal direction of feed cylinder are equal, all be equipped with on the feed cylinder around rectangular shape guide hole with baffle sliding seal complex fixed corrosion-resistant sealing strip, baffle front side and rear side all are provided with respectively with feed cylinder front side inner wall and rear side inner wall sliding seal complex activity corrosion-resistant sealing strip, the left side of baffle is provided with the push handle.
2. The large and medium-sized coal anaerobic fermentation layered heating experimental device according to claim 1, wherein the experimental device is characterized in that: the baffle right side edge of the left horizontal push-pull type material blocking mechanism is provided with a limiting rib with the thickness smaller than that of the baffle, the baffle left side edge of the right horizontal push-pull type material blocking mechanism is provided with a limiting groove along the length direction, the baffle right side edge of the left horizontal push-pull type material blocking mechanism and the baffle left side edge of the right horizontal push-pull type material blocking mechanism are correspondingly contacted in the enrichment culture area, and the limiting rib stretches into and is assembled in the limiting groove.
3. The experimental method adopting the large and medium-sized coal anaerobic fermentation layered heating experimental device as claimed in claim 2, which is characterized in that: comprises the steps of,
(1) Opening the tank cover, the left horizontal push-pull type material blocking mechanism and the right horizontal push-pull type material blocking mechanism, pouring the processed coal dust into a mixed gas production area in the tank body through an upper port of the blanking cylinder, and then closing the left horizontal push-pull type material blocking mechanism and the right horizontal push-pull type material blocking mechanism, wherein an enrichment culture area and the mixed gas production area are separated;
(2) Adding a reagent and a source bacterial source required by bacterial liquid enrichment into an enrichment culture area through an upper port of a blanking barrel, and then closing a tank cover;
(3) Air in the enrichment culture area is pumped out through the second pumping hole, when the air pressure in the enrichment culture area reaches 0.08 MPa, the pumping is finished, the second pumping hole is closed, and the gas-producing bacteria liquid is enriched and cultured for 4-5 days;
(4) Starting the tubular heater, when the temperature of the tubular heater at the bottom of the tank body reaches or exceeds a preset temperature value, the preset temperature value is 35 ℃, the temperature control switch is turned off and starts to keep constant temperature, and meanwhile the tubular heater at the bottom of the tank body is turned off, and the tubular heater at the circumferential side part of the tank body starts to be started;
(5) After the temperature between the upper area and the lower area in the fermentation tank reaches a preset value and is stable, opening a left horizontal push-pull type material blocking mechanism and a right horizontal push-pull type material blocking mechanism to enable enriched gas-producing bacteria liquid to smoothly flow into a mixed gas producing area, closing the left horizontal push-pull type material blocking mechanism and the right horizontal push-pull type material blocking mechanism, pumping out air in the mixed gas producing area through a first pumping hole, and closing the first pumping hole after the pumping is finished when the air pressure in the mixed gas producing area reaches 0.08 MPa;
(6) High-pressure nitrogen or argon is introduced into the tank body through a plurality of gas transmission ports formed in the top of the tank body along the circumferential direction, the high-pressure nitrogen or argon firstly blows coal downwards through a circulating channel formed between the circumference of the side wall of the tank body and the outer circle of the circulating guide cylinder, coal dust enters the circulating guide cylinder inwards through a through hole formed between the lower end of the circulating guide cylinder and the bottom of the tank body, then moves upwards along the circulating guide cylinder, and finally enters the circulating channel outwards through a circulating through hole formed between the upper end of the circulating guide cylinder and the top of the tank body, so that continuous or intermittent circulating stirring of coal dust and gas-producing bacteria liquid is realized, and the coal dust and the gas-producing bacteria are uniformly mixed to form a fermentation mixture;
(7) Continuously fermenting the fermentation mixture in the tank body for 25-35 days, taking out the fermented gas through the first extraction opening every 1-3 days during the period, and testing the content of methane and hydrogen in the fermented gas; simultaneously opening a liquid discharge valve at intervals of 1-3 days, taking out fermentation liquid generated by fermentation through a liquid discharge pipe, and analyzing and testing the fermentation liquid;
(8) After anaerobic fermentation is completed, a liquid discharge valve is opened, high-pressure water is sprayed into the tank body through a high-pressure nozzle, and simultaneously, air is introduced into the tank body through a plurality of air delivery ports formed in the top of the tank body along the circumferential direction, so that fermentation mixture in the tank body and residues attached to the inner wall of the tank body are washed away and discharged through a liquid discharge pipe.
4. The experimental method of the large and medium-sized coal anaerobic fermentation layered heating experimental device according to claim 3, which is characterized in that: the specific process of opening the left horizontal push-pull type material blocking mechanism and the right horizontal push-pull type material blocking mechanism in the step (1) is that two operators hold a left push-pull handle and a right push-pull handle, pull the left push-pull handle leftwards and pull the right push-pull handle rightwards, a limit rib is separated from a limit groove, a left baffle moves leftwards and a right baffle moves rightwards and horizontally, so that a mixed gas production area and an enrichment culture area are communicated up and down, and a guide wheel at the upper part and a guide wheel at the lower part play a guide and support role in the process of horizontally moving the baffle.
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