CN115028492A - Aerobic composting methane emission reduction test device and use method thereof - Google Patents
Aerobic composting methane emission reduction test device and use method thereof Download PDFInfo
- Publication number
- CN115028492A CN115028492A CN202210635048.4A CN202210635048A CN115028492A CN 115028492 A CN115028492 A CN 115028492A CN 202210635048 A CN202210635048 A CN 202210635048A CN 115028492 A CN115028492 A CN 115028492A
- Authority
- CN
- China
- Prior art keywords
- methane
- compost
- composting
- gas
- temperature
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 title claims abstract description 224
- 238000009264 composting Methods 0.000 title claims abstract description 95
- 238000000034 method Methods 0.000 title claims abstract description 34
- 238000012360 testing method Methods 0.000 title claims abstract description 31
- 230000009467 reduction Effects 0.000 title claims abstract description 29
- 238000006243 chemical reaction Methods 0.000 claims abstract description 63
- 238000009423 ventilation Methods 0.000 claims abstract description 46
- 238000012544 monitoring process Methods 0.000 claims abstract description 35
- 238000004519 manufacturing process Methods 0.000 claims abstract description 11
- 239000002361 compost Substances 0.000 claims description 96
- 238000003756 stirring Methods 0.000 claims description 24
- 239000000463 material Substances 0.000 claims description 21
- 238000009833 condensation Methods 0.000 claims description 14
- 230000005494 condensation Effects 0.000 claims description 14
- 238000005192 partition Methods 0.000 claims description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 10
- 238000005070 sampling Methods 0.000 claims description 9
- 230000001186 cumulative effect Effects 0.000 claims description 5
- 238000007789 sealing Methods 0.000 claims description 5
- 230000007423 decrease Effects 0.000 claims description 4
- 238000002156 mixing Methods 0.000 claims description 4
- 230000032683 aging Effects 0.000 claims description 3
- 210000000416 exudates and transudate Anatomy 0.000 claims description 3
- 239000000523 sample Substances 0.000 claims description 3
- 238000005422 blasting Methods 0.000 claims description 2
- 238000004364 calculation method Methods 0.000 claims description 2
- 239000011810 insulating material Substances 0.000 claims description 2
- 229910001220 stainless steel Inorganic materials 0.000 claims description 2
- 239000010935 stainless steel Substances 0.000 claims description 2
- 230000008569 process Effects 0.000 abstract description 12
- 230000008878 coupling Effects 0.000 abstract 1
- 238000010168 coupling process Methods 0.000 abstract 1
- 238000005859 coupling reaction Methods 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 65
- 230000003068 static effect Effects 0.000 description 9
- 238000011160 research Methods 0.000 description 8
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- GQPLMRYTRLFLPF-UHFFFAOYSA-N Nitrous Oxide Chemical compound [O-][N+]#N GQPLMRYTRLFLPF-UHFFFAOYSA-N 0.000 description 4
- 238000000855 fermentation Methods 0.000 description 4
- 230000004151 fermentation Effects 0.000 description 4
- 239000010871 livestock manure Substances 0.000 description 4
- 229910002092 carbon dioxide Inorganic materials 0.000 description 3
- 239000001569 carbon dioxide Substances 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 3
- 210000003608 fece Anatomy 0.000 description 3
- 239000005431 greenhouse gas Substances 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 230000002829 reductive effect Effects 0.000 description 3
- 241000287828 Gallus gallus Species 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 239000003337 fertilizer Substances 0.000 description 2
- 230000004907 flux Effects 0.000 description 2
- 230000000670 limiting effect Effects 0.000 description 2
- 239000001272 nitrous oxide Substances 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 238000009395 breeding Methods 0.000 description 1
- 230000001488 breeding effect Effects 0.000 description 1
- YYRMJZQKEFZXMX-UHFFFAOYSA-L calcium bis(dihydrogenphosphate) Chemical compound [Ca+2].OP(O)([O-])=O.OP(O)([O-])=O YYRMJZQKEFZXMX-UHFFFAOYSA-L 0.000 description 1
- 229910000389 calcium phosphate Inorganic materials 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004817 gas chromatography Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000012774 insulation material Substances 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 230000000968 intestinal effect Effects 0.000 description 1
- 244000144972 livestock Species 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 235000019691 monocalcium phosphate Nutrition 0.000 description 1
- 230000020477 pH reduction Effects 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 238000009270 solid waste treatment Methods 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05F—ORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C, e.g. FERTILISERS FROM WASTE OR REFUSE
- C05F17/00—Preparation of fertilisers characterised by biological or biochemical treatment steps, e.g. composting or fermentation
- C05F17/90—Apparatus therefor
- C05F17/993—Arrangements for measuring process parameters, e.g. temperature, pressure or humidity
-
- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05F—ORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C, e.g. FERTILISERS FROM WASTE OR REFUSE
- C05F17/00—Preparation of fertilisers characterised by biological or biochemical treatment steps, e.g. composting or fermentation
- C05F17/90—Apparatus therefor
- C05F17/964—Constructional parts, e.g. floors, covers or doors
-
- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05F—ORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C, e.g. FERTILISERS FROM WASTE OR REFUSE
- C05F17/00—Preparation of fertilisers characterised by biological or biochemical treatment steps, e.g. composting or fermentation
- C05F17/90—Apparatus therefor
- C05F17/964—Constructional parts, e.g. floors, covers or doors
- C05F17/971—Constructional parts, e.g. floors, covers or doors for feeding or discharging materials to be treated; for feeding or discharging other material
- C05F17/979—Constructional parts, e.g. floors, covers or doors for feeding or discharging materials to be treated; for feeding or discharging other material the other material being gaseous
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K13/00—Thermometers specially adapted for specific purposes
-
- 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
- G01N33/0004—Gaseous mixtures, e.g. polluted air
-
- 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
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/40—Bio-organic fraction processing; Production of fertilisers from the organic fraction of waste or refuse
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Biochemistry (AREA)
- Organic Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Microbiology (AREA)
- Molecular Biology (AREA)
- Biotechnology (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Food Science & Technology (AREA)
- Medicinal Chemistry (AREA)
- Analytical Chemistry (AREA)
- General Health & Medical Sciences (AREA)
- Combustion & Propulsion (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Fertilizers (AREA)
Abstract
The invention belongs to the technical field of composting test equipment, and discloses an aerobic composting methane emission reduction test device and a using method thereof, wherein the upper end of a composting reaction chamber is communicated with a methane monitoring system, a temperature monitoring module and a pile turning module are arranged in the composting reaction chamber, and the lower end of the side surface of the composting reaction chamber is communicated with a ventilation module; through the data coupling of the online monitoring of the methane concentration and the online monitoring of the gas flow, the scientific problem of accurate, real-time and dynamic monitoring of the methane in the composting process is solved, the production data of the methane gas in different time periods can be obtained, and the methane emission change characteristics in the composting process can be conveniently researched.
Description
Technical Field
The invention belongs to the technical field of composting test equipment, and particularly relates to an aerobic composting methane emission reduction test device and a using method thereof.
Background
At present, high-temperature aerobic composting is a common solid waste treatment technology at present. However, a great amount of Green House Gas (GHG) is generated during the composting process, mainly including carbon dioxide, methane, nitrous oxide, and the like.
The problem of fertilizer efficiency reduction of compost products is caused, and environmental problems such as greenhouse effect, soil acidification and the like are aggravated, wherein although the production of methane is less than that of carbon dioxide, the infrared absorption capacity of methane is strong, and the greenhouse effect is 20-30 times that of carbon dioxide.
At present, researches on methane emission reduction of the livestock breeding industry mainly focus on intestinal fermentation processes, and the researches on methane emission reduction in the excrement management process are less. In few studies on methane emission reduction of livestock manure composts, a static box method is often adopted for monitoring the methane production, and the static box method is used for studying the greenhouse gas emission of farmlands in the early stage. In the research of compost methane emission reduction, a static box is generally of a cubic or cylindrical structure with an opening at the bottom, the static box is generally required to be corrosion-resistant and heat-insulating in material, and a material with the functions of light reflection and heat insulation is wrapped outside the static box. When in use, the fertilizer is buckled on the compost body, and the box body is ensured to be in sealed contact with the compost body. And finally, calculating the accumulated discharge according to the total surface area of the pile body and the methane discharge flux in different time periods.
For example, the influence of the addition of calcium superphosphate on the discharge of methane and nitrous oxide in the aerobic composting of pig manure is researched by adopting a static dark box-gas chromatography in the muggy process. The static camera bellows is composed of a PVC box body and a base with a groove, wherein the groove is filled with water for sealing.
The method has the advantages that: can be applied to both open and closed composting systems, and the determination steps are relatively simple. But has the disadvantages that: 1. the aerobic composting process requires ventilation and unscheduled turn-ups, which can affect the placement of static tanks and the collection of gases within the tanks. 2. Since the darkbox method uses the methane emission flux of limited sampling points to estimate the total emission, the error between the calculated value and the actual value is inevitable.
In the current aerobic composting methane emission reduction research, a more commonly adopted research method is that composting is directly carried out in a small-sized closed test device by reducing the composting scale (the total weight of composting materials is usually not more than 20kg), and gas generated by composting can be collected in full. However, such small scale test units result in slow compost warming due to the small volume of the compost and the high compost temperature is difficult to maintain. Operations such as turning and ventilation in the test process are mostly controlled manually, and accurate control of compost fermentation conditions cannot be realized. The methane production in the composting process is closely related to the condition control of the composting process. Therefore, the results of methane emissions obtained with such composting devices do not reflect the real situation.
Through the analysis, the current aerobic composting methane emission reduction research process mainly has the following problems:
(1) the open aerobic composting is susceptible to the external environment temperature. And the methane emission measured and calculated by adopting the static box method is an estimated value based on a limited measuring point, and certain errors may exist.
(2) The closed aerobic composting test device can not realize dynamic control on composting conditions, the release of methane is easily influenced by other accidental variable factors, and the authenticity of data is insufficient.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides an aerobic composting methane emission reduction test device and a using method thereof.
The invention is realized in this way, an aerobic composting methane emission reduction test device includes:
a composting reaction chamber and a gas sampling chamber;
the composting reaction chamber is internally provided with a temperature monitoring module and a pile turning module, the temperature monitoring module is used for detecting the temperature in the composting reaction chamber by using a temperature sensor, and the pile turning module is used for stirring the compost by using a compost stirring device;
the lower end of the side face of the composting reaction chamber is communicated with a ventilation module, the ventilation module is used for blasting air into the composting reaction chamber, and a first valve is arranged between the composting reaction chamber and the ventilation module;
the composting reaction chamber is characterized in that a gas circulation pipeline and a methane monitoring system are arranged above the composting reaction chamber, the gas pipeline is provided with a condensation chamber and a second valve, the valve is composed of a methane sensor and an electromagnetic valve controlled by the methane sensor, and the sensor can convert the gas concentration in the pipeline into an electric signal to control a steering valve. If methane is not detected, the gas channel in the valve is communicated upwards, and the gas flows upwards to the tail gas collecting device; if methane is detected, the valve is opened towards the methane monitoring system, and the gas flows to the methane monitoring system horizontally. The methane monitoring system is composed of a methane concentration on-line monitoring system, a temperature and pressure signal compensation gas flowmeter and a data processing center.
Further, the temperature sensor is arranged on the surface of the compost stirring device and is connected with a compost temperature acquisition device and a temperature control center outside the compost reaction chamber through a connecting circuit;
the lower end of the compost stirring device is connected with a pile turning motor, and the pile turning motor is connected with a temperature control center.
Further, the ventilation module includes air-blower, gas flowmeter, timing converter and gas pipeline, the air-blower passes through gas pipeline and compost reacting chamber intercommunication, gas flowmeter installs in the middle of the gas pipeline, the air-blower is connected with the timing converter.
Further, the outer wall of the composting reaction chamber is made of heat insulation materials, and the gas sampling chamber main body is made of stainless steel materials.
Further, a compost sampling hole is formed in the middle of the left side of the compost reaction chamber, and a compost exudate discharge valve is installed at the lower end of the right side of the compost reaction chamber.
Further, the bottom of the inner side of the composting reaction chamber is provided with a perforated partition plate, and the perforated partition plate is positioned on the upper side of the connecting position of the composting reaction chamber and the ventilation module.
The invention also aims to provide a using method of the aerobic composting methane emission reduction test device, which comprises the following steps:
step one, fully and uniformly mixing compost materials, transferring the compost materials into a compost reaction chamber, and sealing the compost reaction chamber;
secondly, fixing a temperature measuring device on the surface of the stirrer, acquiring the temperature of the compost by a probe of a temperature measuring device, transmitting temperature data to a temperature acquisition device in real time, and transmitting the temperature data to a temperature control center by the compost temperature acquisition device;
thirdly, the temperature control center controls the compost stirring device and the ventilation module according to the collected temperature data, and gas blown by the ventilation module enters the compost body through the perforated partition plate at the bottom of the compost reaction chamber;
and fourthly, allowing methane gas generated in the composting reaction chamber to flow through a methane monitoring system through a second valve, and obtaining the methane generation amount in any time period of the composting by the system through continuous acquisition of real-time methane concentration and gas flow and calculation of a data processing center.
Further, the temperature control center of step three controls the ventilation module and the compost stirring device according to the collected temperature data, including:
when the temperature of the compost rises to 50 ℃, the ventilation module is started, the ventilation quantity and the ventilation time are determined according to the volume and the quality of the materials, the ventilation quantity can be adjusted by using a gas flowmeter, and the ventilation time is set by using a timing converter. When the temperature begins to gradually decrease to the ambient temperature, the ventilation module is automatically closed, and the material enters an aging stage.
When the temperature of the pile body exceeds 65 ℃, the temperature control center automatically sends out an operation instruction, automatically starts the compost stirring device, and sets each stirring to last for 10 minutes;
further, the determination method for the cumulative methane production in the fourth step comprises the following steps:
the gas generated by composting flows to an air channel above the composting reaction chamber under the pushing of the ventilation system. After passing through the condensation chamber, the water vapor in the mixed gas is condensed and flows down along the condensation pipe. The gas flows upwards, and when methane is contained in the gas generated by composting, the gas flows through a methane monitoring system. The methane monitoring system is internally provided with a methane on-line monitor and a temperature and pressure signal compensation gas flowmeter, the methane on-line monitor measures the methane content (% VOL) in the pipeline every 2s, and the gas flowmeter monitors and records the gas flow in the pipeline in real time. Both parts of data are uploaded to a data processing center. The cumulative amount of methane produced was calculated by the software.
In combination with the technical solutions and the technical problems to be solved, please analyze the advantages and positive effects of the technical solutions to be protected in the present invention from the following aspects:
first, aiming at the technical problems existing in the prior art and the difficulty in solving the problems, the technical problems to be solved by the technical scheme of the present invention are closely combined with the technical scheme to be protected and the results and data in the research and development process, and some creative technical effects brought after the problems are solved are analyzed in detail and deeply. The specific description is as follows:
the invention adopts a closed composting device and is provided with a temperature-controlled composting system and a ventilation system, so that the influence of external environmental factors on the composting process can be reduced, and the automatic control system can reduce manual intervention and control composting reaction conditions more accurately and timely, so that the fermentation is more thorough, and test data is more real and credible.
The invention adopts the methane concentration on-line monitoring system and the gas flow on-line monitoring system, and carries out real-time operation on the data acquired by the methane concentration on-line monitoring system and the gas flow on-line monitoring system to obtain the accumulated methane generation amount, thereby saving the steps of gas acquisition and subsequent gas detection, greatly reducing the workload of the test, and reading the methane generation amount value in real time to be an accurate value rather than an estimated value.
In addition, the device of the invention is coupled with a temperature control system, a methane induction electromagnetic valve and a data operation platform, and the device and software are also protected by the invention.
Secondly, considering the technical scheme as a whole or from the perspective of products, the technical effect and advantages of the technical scheme to be protected by the invention are specifically described as follows:
the method has high intelligent degree and rapid and accurate measurement data, can greatly reduce the workload of compost methane emission reduction research tests, and improves the accuracy of research test results.
Thirdly, as the creative auxiliary evidence of the claims of the present invention, it is also reflected in that the technical solution of the present invention solves the technical problem which people have eagerly solved but have not succeeded all the time:
the device solves the contradiction between accurate measurement of methane production in the aerobic composting fermentation process and compost turning and ventilation. Meanwhile, composting and ventilation operations can be automatically controlled, and the methane production can be continuously monitored in real time. In addition, the closed device can recover the harmful gas generated by the compost in a full amount, and the adverse effect on the environment is reduced.
Drawings
FIG. 1 is a schematic structural diagram of an aerobic composting methane emission reduction test device provided by an embodiment of the invention.
FIG. 2 is a flow chart of a using method of the aerobic composting methane emission reduction testing device provided by the embodiment of the invention.
In the figure: 1. a compost sampling hole; 2. a composting reaction chamber; 3. a perforated partition plate; 4. a timing converter; 5. a blower; 6. a gas flow meter; 7. a first valve; 8. a compost stirring device; 9. a temperature measuring probe; 10. a compost leachate discharge valve; 11. a compost temperature acquisition device; 12. a temperature control center; 13. a pile turning motor; 14. a water circulation condensation chamber; 15. a second valve; 16. temperature and pressure signal compensation gas flowmeter; 17. a methane on-line monitor; 18. a data processing center.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
First, an embodiment is explained. This section is an explanatory embodiment expanding on the claims so as to fully understand how the present invention is embodied by those skilled in the art.
As shown in fig. 1, the aerobic composting methane emission reduction test device provided by the embodiment of the invention comprises a composting reaction chamber 2 and a subsequent methane monitoring system (13-17); the composting reaction chamber 2 is a sealed and heat-insulated composting reaction chamber.
A compost stirring device 7 and a temperature measuring device 8 are arranged in the compost reaction chamber 2, the temperature measuring device 8 is arranged on the surface of the compost stirring device 7, and the temperature measuring device 8 is connected with a compost temperature acquisition device 10 and a temperature control center 11 on the outer side of the compost reaction chamber 2 through a connecting circuit; the lower end of the compost stirring device 8 is connected with a pile turning motor 12, and the pile turning motor 12 is connected with a temperature control center 11.
The lower end of the side surface of the composting reaction chamber 2 is communicated with a blower 5 through a gas pipeline and a first valve 7, a gas flowmeter 6 is arranged in the middle of the gas pipeline, and the blower 5 is connected with a timing converter 4. The bottom of the inner side of the composting reaction chamber 2 is provided with a perforated partition plate 3, and the perforated partition plate 3 is positioned on the upper side of the connecting position of the composting reaction chamber 2 and the gas pipeline.
In the embodiment of the invention, a gas circulation pipeline and a methane monitoring system are arranged above the composting reaction chamber 2. The gaseous circulation pipe connection gas condensation chamber 14, the condensation chamber is through cooling water circulation to the condensation of vapor in the compost air current, in vapor meets the condensation and condenses backward flow to compost reacting chamber 2 after for the water droplet, the residual gas gets into second valve 15, the methane among the gas mixture can be responded to the second valve, output signal of telecommunication control valve turns to, make the gas that contains methane flow to methane monitoring system (16 ~ 18), if not detect methane in the gas, then directly release to tail gas collection device.
The outer wall of the composting reaction chamber 2 in the embodiment of the invention is made of heat insulating materials, and the rest of the gas pipelines are made of PPR materials except for the part of the condensing chamber which is made of glass materials.
In the embodiment of the invention, a compost sampling hole 1 is formed in the middle of the left side of a compost reaction chamber 2, and a compost exudate discharge valve 10 is installed at the lower end of the right side of the compost reaction chamber 2.
As shown in fig. 2, a method for using an aerobic composting methane emission reduction test device provided in an embodiment of the present invention includes:
s101, sufficiently and uniformly mixing the compost materials, transferring the compost materials to a composting reaction chamber, and sealing the composting reaction chamber;
s102, the temperature measuring device automatically identifies the temperature of the compost, uploads the temperature to a compost temperature collecting device through a data line, and then the temperature is transmitted to a temperature control center through the compost temperature collecting device;
s103, controlling the compost stirring device and the ventilation module by the temperature control center according to the acquired temperature data, wherein gas blown by the ventilation module enters a compost body through a perforated partition plate at the bottom of the compost reaction chamber;
and S104, allowing methane gas generated by composting to rise to an upper gas pipeline, and flowing through a methane monitoring system after condensation and a second valve.
In the embodiment of the present invention, the temperature control center in step S103 controls the compost stirring apparatus and the ventilation module according to the collected temperature data, including:
when the temperature of the compost rises to 50 ℃, the ventilation module is started, the ventilation quantity and the ventilation time are determined according to the volume and the quality of the materials, the ventilation quantity can be adjusted by using a gas flowmeter, and the ventilation time is set by using a timing converter. When the temperature begins to gradually decrease to the environmental temperature, the ventilation module is automatically closed, and the material enters an aging stage;
when the temperature of the pile body exceeds 65 ℃, the temperature control center automatically sends out an operation instruction, the compost stirring device is automatically started, and each stirring is set to last for 10 minutes.
The method for measuring the cumulative methane production in step S104 in the embodiment of the present invention includes:
the gas generated by composting and the gas blown in can rise to an air passage above the composting reaction chamber under the action of pressure, and the rising effect is more obvious because the density of methane is lower than that of air. The mixed gas passes through the condensation chamber, and the water vapor is cooled into water, so that the water vapor is prevented from interfering with further measurement. The gas continues to flow to a second valve, which is a methane-sensing control valve. If the mixed gas contains methane, the methane sensor can convert the gas concentration into an electric signal to control the valve to be upwards connected, and the gas containing methane enters a methane monitoring system to be quantitatively detected. If the compost does not produce methane gas, the valve is communicated leftwards, and the gas directly enters the waste gas collecting device. The valve is arranged to reduce the workload of the methane monitoring system and prolong the service life of the system.
And II, application embodiment. In order to prove the creativity and the technical value of the technical scheme of the invention, the part is the application example of the technical scheme of the claims on specific products or related technologies.
Fully mixing the chicken manure with the wood chips, wherein the total weight of the chicken manure is about 100kg, the water content of the materials is adjusted to about 60%, and the C/N is controlled to be about 25. Putting the uniformly mixed materials into a composting reaction chamber, and then covering and sealing. And starting an automatic temperature detection system in the composting reaction chamber. When the compost lasts for about 6 hours, the temperature of the compost body rises to 50 ℃, ventilation system parameters are manually set, the ventilation rate is set to be 3L/min, the timing conversion device is set to be opened for 30min, and the timing conversion device is closed for 30 min.
And (3) after the compost lasts for 12 hours, the temperature of the compost exceeds 65 ℃, the compost turning system is automatically started, and the turning device is stopped after running for 10 min.
Gas generated by composting enters an air passage above the reaction chamber, and water vapor in the mixed gas is condensed after passing through the condensation chamber. The residual gas enters the second valve, and the flow direction of the gas is controlled by the second valve. As composting proceeds, methane production peaks at the high temperature of the compost (55 ℃ C. to 70 ℃ C.) and then gradually decreases. Until the temperature of the stack body is reduced to the ambient temperature, the methane production approaches zero.
In the description of the present invention, "a plurality" means two or more unless otherwise specified; the terms "upper", "lower", "left", "right", "inner", "outer", "front", "rear", "head", "tail", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and to simplify the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
The above description is only for the purpose of illustrating the present invention and the appended claims are not to be construed as limiting the scope of the invention, which is intended to cover all modifications, equivalents and improvements that are within the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. The aerobic composting methane emission reduction test device is characterized by comprising:
a composting reaction chamber and a gas sampling chamber;
the temperature monitoring module is used for detecting the temperature in the composting reaction chamber by using a temperature sensor, and the pile turning module is used for stirring the compost by using a compost stirring device;
the lower end of the side face of the composting reaction chamber is communicated with a ventilation module, the ventilation module is used for blasting air into the composting reaction chamber, and a first valve is arranged between the composting reaction chamber and the ventilation module.
2. The aerobic compost methane emission reduction test device as claimed in claim 1, wherein a gas circulation pipeline and a methane monitoring system are arranged above the compost reaction chamber, the gas pipeline is provided with a condensation chamber and a second valve, the valve is composed of a methane sensor and an electromagnetic valve controlled by the methane sensor, and the sensor converts the gas concentration in the pipeline into an electric signal to control a steering valve; if methane is not detected, the gas channel in the valve is communicated upwards, and the gas flows upwards to the tail gas collecting device; if methane is detected, the valve is opened towards the methane monitoring system, and the gas horizontally flows to the methane monitoring system; the methane monitoring system is integrated with a methane concentration on-line monitoring system, a temperature and pressure signal compensation gas flowmeter and a data processing center.
3. The aerobic compost methane emission reduction testing device as claimed in claim 1, further comprising a temperature sensor installed on the surface of the compost stirring device, wherein the temperature sensor is connected with a compost temperature collecting device and a temperature control center outside the compost reaction chamber through a connecting circuit;
the lower end of the compost stirring device is connected with a pile turning motor, and the pile turning motor is connected with a temperature control center.
4. The aerobic compost methane emission reduction testing device as claimed in claim 1, further comprising a blower, a gas flow meter, a timing converter and a gas pipeline, wherein the blower is communicated with the compost reaction chamber through the gas pipeline, the gas flow meter is arranged in the middle of the gas pipeline, and the blower is connected with the timing converter.
5. The aerobic composting methane emission reduction test device of claim 1 wherein the outer wall of the composting reaction chamber is made of a heat insulating material, and the gas sampling chamber body is made of a stainless steel material;
and a compost sampling hole is formed in the middle of the left side of the compost reaction chamber, and a compost exudate discharge valve is installed at the lower end of the right side of the compost reaction chamber.
6. The aerobic composting methane emission reduction test device of claim 1 wherein the bottom of the inner side of the composting reaction chamber is provided with an opening partition plate, and the opening partition plate is positioned on the upper side of the connecting position of the composting reaction chamber and the ventilation module.
7. The use method of the aerobic composting methane emission reduction test device is characterized by comprising the following steps:
step one, fully and uniformly mixing compost materials, transferring the compost materials into a compost reaction chamber, and sealing the compost reaction chamber;
fixing a temperature measuring device on the surface of the stirrer, collecting the temperature of the compost by a probe of a temperature measuring device, transmitting the temperature data to a temperature collecting device in real time, and transmitting the temperature data to a temperature control center by the compost temperature collecting device;
thirdly, the temperature control center controls the compost stirring device and the ventilation module according to the collected temperature data, and gas blown by the ventilation module enters the compost body through the perforated partition plate at the bottom of the compost reaction chamber;
and fourthly, allowing methane gas generated in the composting reaction chamber to flow through a methane monitoring system through a second valve, and obtaining the methane generation amount in any time period of the composting by the system through continuous acquisition of real-time methane concentration and gas flow and calculation of a data processing center.
8. The use method of the aerobic composting methane emission reduction test device as claimed in claim 7, wherein the step three temperature control center controlling the ventilation module and the composting stirring device according to the collected temperature data comprises:
when the temperature of the compost rises to 50 ℃, starting a ventilation module, determining ventilation quantity and ventilation time according to the volume and the quality of the materials, wherein the ventilation quantity can be adjusted by using a gas flowmeter, and the ventilation time is set by using a timing converter; when the temperature begins to gradually decrease to the ambient temperature, the ventilation module is automatically closed, and the material enters an aging stage.
When the temperature of the pile body exceeds 65 ℃, the temperature control center automatically sends out an operation instruction, the compost stirring device is automatically started, and each stirring is set to last for 10 minutes.
9. The use method of the aerobic composting methane emission reduction test device as claimed in claim 7, wherein the determination method for the cumulative production of methane in the step four comprises the following steps:
the air generated by composting is pushed by the ventilation system, and the air flows to an air channel above the composting reaction chamber. After passing through the condensation chamber, water vapor in the mixed gas is condensed and flows down along the condensation pipe; the gas flows upwards, and when methane is contained in the gas generated by composting, the gas flows through a methane monitoring system.
10. The use method of the aerobic compost methane emission reduction test device as claimed in claim 9, characterized in that a methane on-line monitor and a temperature and pressure signal compensation gas flowmeter are arranged in the methane monitoring system, the methane on-line monitor measures the methane content in the pipeline every 2s, and the gas flowmeter monitors and records the gas flow in the pipeline in real time. Both parts of data are uploaded to a data processing center. The cumulative amount of methane produced was calculated by the software.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210635048.4A CN115028492A (en) | 2022-06-07 | 2022-06-07 | Aerobic composting methane emission reduction test device and use method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210635048.4A CN115028492A (en) | 2022-06-07 | 2022-06-07 | Aerobic composting methane emission reduction test device and use method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115028492A true CN115028492A (en) | 2022-09-09 |
Family
ID=83123281
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210635048.4A Pending CN115028492A (en) | 2022-06-07 | 2022-06-07 | Aerobic composting methane emission reduction test device and use method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115028492A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101062872A (en) * | 2007-04-17 | 2007-10-31 | 同济大学 | Bidirectional ventilation and pneumatic pile-turning composting process |
| CN105294187A (en) * | 2015-10-23 | 2016-02-03 | 杭州师范大学 | Aerobic composting stink in-situ monitoring device and operation method thereof |
| CN106747752A (en) * | 2017-03-09 | 2017-05-31 | 北京市农林科学院 | A kind of compost fermentation tank |
| CN206721058U (en) * | 2017-03-09 | 2017-12-08 | 北京市农林科学院 | A kind of compost fermentation tank |
| CN110713400A (en) * | 2019-11-21 | 2020-01-21 | 山东大学 | Aerobic composting waste heat power generation system and working method thereof |
-
2022
- 2022-06-07 CN CN202210635048.4A patent/CN115028492A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101062872A (en) * | 2007-04-17 | 2007-10-31 | 同济大学 | Bidirectional ventilation and pneumatic pile-turning composting process |
| CN105294187A (en) * | 2015-10-23 | 2016-02-03 | 杭州师范大学 | Aerobic composting stink in-situ monitoring device and operation method thereof |
| CN106747752A (en) * | 2017-03-09 | 2017-05-31 | 北京市农林科学院 | A kind of compost fermentation tank |
| CN206721058U (en) * | 2017-03-09 | 2017-12-08 | 北京市农林科学院 | A kind of compost fermentation tank |
| CN110713400A (en) * | 2019-11-21 | 2020-01-21 | 山东大学 | Aerobic composting waste heat power generation system and working method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1987421B (en) | Method and device for in-site detecting soil carbon dioxide flux | |
| CN106769978B (en) | Fermentation tank tail gas in-line analyzer | |
| CN108680551A (en) | Optical dissolved oxygen sensor original position self-calibrating device and method | |
| CN202814873U (en) | Detector for volatile sulphides in surface seawater and atmosphere | |
| CA2057473A1 (en) | System for measuring engine exhaust constituents | |
| CN111562355B (en) | Automatic monitoring system for soil greenhouse gas flux | |
| CN102466636A (en) | Device for detecting marine volatile sulfur compounds with ultraviolet fluorescence method and manufacture method of device | |
| CN102778445A (en) | Intelligent analyzer and detection method for standard state dry basis | |
| CN104730266A (en) | Method and instrument for synchronous and continuous real-time determination of total organic carbon and total nitrogen | |
| CN112816267A (en) | Collection and measuring device for anaerobic stabilization sludge release VSCs gas | |
| CN110095579A (en) | The method of the decomposed degree of material is judged by detection ferment tank tail gas variation | |
| CN105424134A (en) | Device and method for metering trace gas | |
| CN115028492A (en) | Aerobic composting methane emission reduction test device and use method thereof | |
| CN110320331A (en) | A kind of Atmosphere Environment Monitoring System Bases | |
| CN1995318B (en) | Anerobic type biological reactor tank | |
| CN112472069B (en) | Animal respiration heat measuring method and device | |
| CN104122374A (en) | Method and device for checking sulfur trioxide sampling test system | |
| CN204479597U (en) | A kind ofly realize sampling/calibration alternately air automatic monitoring the device that runs of equivalence | |
| CN103163178A (en) | Full-automatic intelligent tester of quick lime | |
| CN115349849A (en) | Breath heat measuring method and breath heat measuring device for animals | |
| CN214538820U (en) | Odor space multipoint sampling system | |
| CN205898218U (en) | Take marsh gas recognition function's ultrasonic wave gas flowmeter | |
| CN214895051U (en) | Compost carbon nitrogen conversion process gas acquisition and analysis system | |
| RU2477886C1 (en) | Method to determine and monitor value of massive emission of pollutants into environment from livestock room and system for its implementation | |
| CN107345186A (en) | A kind of leaven cultivating equipment and koji-making processing control method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20220909 |