CN1944286A - Combined temperature increasing device and method by anaerobic degesting greenhouse and solar water heater - Google Patents
Combined temperature increasing device and method by anaerobic degesting greenhouse and solar water heater Download PDFInfo
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Abstract
The present invention is combined heating device and method with both greenhouse and solar water heater for anaerobic digesting, belongs to the field of anaerobic digesting technology, and aims at lowering the power consumption and raising the economic performance of anaerobic digesting. The anaerobic digesting apparatus includes greenhouse and solar water heater, and has digesting reactor set inside the greenhouse, temperature sensors set in the greenhouse and the solar water heater separately, controller, hot water pump and heat exchanger inside the digesting reactor. The present invention can utilize solar energy alone to maintain the anaerobic digesting reactor operating at medium temperature or high temperature.
Description
Technical field
The present invention relates to a kind of greenhouse-solar water heater combination heating device and method of utilizing, belong to the anaerobic digestion techniques field.
Background technology
Anaerobic digestion techniques is converted into renewable and clean energy resource one biogas to agricultural crop straw, feces of livestock and poultry, municipal sludge the like waste, is one of effective way that realizes organic waste harmless treatment and recovery energy.
Temperature is one of greatest factor that influences anaerobic digestion.Anaerobic digestion has two efficient digestion temperature sections, i.e. mesophilic digestion section (30～35 ℃) and thermophilic digestion section (50～55 ℃) (the Zhang Zijie chief editor. drainage system: volume two [M], 4 editions. Beijing: China Construction Industry Press, 1997,357.).At these two temperature sections, anaerobic digestion can obtain the highest digestive efficiency and gas production rate.Therefore, keeping anaerobic digestion is vital at this temperature section to realizing that efficient anaerobic digests.At present, adopt the method for extra energize mostly,, under efficient temperature section, move to guarantee reactor by anaerobic digestion reaction vessel is heated.Heating means commonly used have (Hamed M.El-Mashad such as Boiler Steam heating, electrically heated, gas-firing or biogas heating, Wilko K.P, Grietje Zeeman.van Loon.Design of ASolar Thermophilic Anaerobic Reactor for Small Farms[J] .BiosystemsEngineering, 2004,87 (3), 79～87.).Though these methods all have effect preferably, need the extra heat that increases; Sometimes (as the winter in cold) heating heats the heat of consumption even the heat that can contain above the biogas of output.Thereby cause the increase of running cost, even lose more than gain fully economically.
A kind of canonical form of conventional electric heating device: mainly comprise digestion reactor 3, controller 4, temperature sensor 5, power supply 13, electric heater 14 etc.Conventional connection is as follows: digestion reactor 3 is in the laboratory, and storage tank 11 connects fresh feed pumps 8, and fresh feed pump 8 connects digestion reactors 3.Gaseous diffuser 6 is placed in the digestion reactor 3, and gaseous diffuser 6 connects air pump 9, and air pump 9 forms a gas circulation loop by pipe connection to digestion reactor 3.Gaseous diffuser 6 is used to make that gas and mixing of materials in the digestion reactor 3 are even.Place electric heater 14 in digestion reactor 3, the outside power supply 13 that connects of this electric heater is used for energize.Temperature sensor 5 is put into digestion reactor 3, and connects controller 4, and controller 4 connects the power supply 13 of electric heater 14, and electric heater 14 is used for heat supplied.
This electrically heated is the heating unit of traditional energy, simultaneously can also be the Boiler Steam heating,, gas-firing or biogas heating etc.The main effect of air pump is for realizing that pneumatic stirring provides power, can also be mechanical stirring simultaneously, realizes by impeller and motor are installed.Traditional energy type of heating and alr mode can be according to the prior art adjustment.
Summary of the invention
For the energy consumption height that overcomes conventional heating means (Boiler Steam heating, electrically heated, gas-firing or biogas heating etc.), less economical shortcoming, the present invention proposes a greenhouse-solar water heater combination heating device and method, be used to improve anaerobic digestion temperature and digestion effect rate, the energy that saving consumes because of heat tracing, thus the production efficiency and the economy of anaerobic digestion improved.Under the situation of not using other any external heat source,, keep the interior temperature of anaerobic digestion reaction vessel near middle-temperature section and high temperature section, to move by utilizing sun power.
Invention comprises two heating units that utilize sun power, the one, greenhouse, the one, solar water heater.Its technological core is by utilizing the combination of the different separately accumulation of energy characteristic of glasshouse and solar water heater, to reach the purpose that heating heats.
The present invention is placed on anaerobic digestion reaction vessel in one glasshouse, at first utilizes the greenhouse heat-insulating effect to improve material temperature in indoor and the reactor, simultaneously, plays the effect that prevents to dispel the heat with heat-insulation and heat-preservation by the greenhouse.In addition, a solar water heater is set outside the greenhouse, utilizes the water in the solar heating solar water heater water tank, and keep stand-by.At night and overcast and rainy, because sunlight is not enough or when not having sunlight fully, the effect in greenhouse can reduce or completely lose, when the temperature of charge in the reactor is reduced to the temperature of setting, at this moment, utilize intelligent temperature-controlled process, the hot water that is accumulated in the solar water heater is pumped in the interior interchanger of reactor, with the material in the reactor heating, play the effect of additional heat, increase and equilibrium temperature.
The invention provides a kind of anaerobic digestion greenhouse-solar water heater combination heating device, comprise that storage tank (11) connects fresh feed pump (8), fresh feed pump (8) connects digestion reactor (3); Gaseous diffuser (6) is placed in the digestion reactor (3), and gaseous diffuser (6) connects air pump (9), and air pump (9) forms a gas circulation loop by pipe connection to digestion reactor (3); It is characterized in that, also include the two parts, the one, greenhouse (2), a solar water heater (1) is set outside greenhouse (2), digestion reactor (3) is placed in the greenhouse (2), temperature sensor (5) I puts into solar water heater (1), temperature sensor (5) II puts into digestion reactor (3), temperature sensor (5) I is connected controller (4) respectively with temperature sensor (5) II, controller (4) connects hot water pump (10), and hot water pump (10) connects solar water heater (1) respectively and is placed on the loop that interchanger (7) in the digestion reactor (3) forms a water and is used for heat supplied; Place interchanger (7) in digestion reactor (3), this interchanger connects hot water pump (10) and solar water heater (1) forms a hot water circulation loop.
Interchanger (7) connects solar water heater (1) and is used for energize, connects hot water pump (10) and is used to provide circulation power.
The invention provides a kind of anaerobic digestion greenhouse-solar water heater combination method for increasing temperature, it is characterized in that, may further comprise the steps:
1) beginning: connect hot water pump (10) power supply, the power supply of controller (4) is adjusted controller (4) program and is brought into operation;
2) temperature sensor (5) I and temperature sensor (5) II begin reading, data are sent and are stored in to controller (4), controller (4) judges whether the interior digestion reactor in greenhouse (2) (3) temperature reaches design temperature 1, and wherein 1 summer of design temperature is 50 ℃, 35 ℃ of spring and autumns;
3) if reach design temperature 1, EP (end of program); If not, judge whether the difference of solar water heater (1) temperature and the interior digestion reactor in greenhouse (2) (3) temperature reaches design temperature 2, wherein design temperature 2 is not less than 3 ℃ again, enough hot water is arranged and does not waste energy to guarantee interchanger (7) simultaneously;
4) if the difference of temperature does not reach design temperature 2, EP (end of program); If reach design temperature 2, hot water pump (10) starts;
5) after hot water pump (10) starts, judge whether the temperature of digestion reactor (3) reaches design temperature 3; Wherein: 3 summers of design temperature are 50-52 ℃, spring and autumn 35-37 ℃;
6) if the temperature of digestion reactor (3) reaches design temperature 3, EP (end of program); If not, judge again whether hot water pump (10) working hour reaches setting-up time 1; Wherein: the basis of design of setting-up time 1 is the required time of hot water that pump completely provides heat in interchanger (7), gets 30-40 second;
7) in setting-up time 1, hot water pump (10) is worked always, judges whether the temperature of digestion reactor (3) reaches design temperature 3; If, EP (end of program); If not, and hot water pump (10) work surpasses setting-up time 1, and hot water pump (10) temporarily stops setting-up time 2, returns step 2 then); Wherein: the basis of design of setting-up time 2 is to make hot water in the interchanger (7) and the abundant heat exchange of material in the digestion reactor (3); Got 4-6 minute; Setting-up time 2 too weak point can cause energy dissipation, oversizely is not enough to heat supply;
The instant always reading of temperature sensor in the whole process (5) I, II.
The invention has the beneficial effects as follows: (1) is under the situation of not using other any external heat sources, enforcement by the technical program, can make the anaerobic digestion temperature of reaction in Beijing and the areas to the south, guarantee 35 ± 5 ℃ of mesophilic digestion sections in spring, autumn, remain on 50 ± 5 ℃ of thermophilic digestion sections in summer.Near operation is compared with conventional heating means, but energy efficient improves anaerobic digestion efficient and economy; (2) utilize the greenhouse sun power to be accumulated the different of characteristic,, can guarantee to digest the temperature relative stability, help efficient anaerobic digestion by intelligent temperature-controlled process with water-heater.
Description of drawings
The present invention is further described below in conjunction with drawings and Examples.
Fig. 1 is a traditional electrical heating unit synoptic diagram.
Fig. 2 is the present device schema.
Among Fig. 1,2: 1 solar water heater; 2 greenhouses; 3 digestion reactors; 4 controllers; 5 temperature sensors (I, II); 6 gaseous diffusers; 7 interchanger; 8 fresh feed pumps; 9 air pumps; 10 hot water pumps; 11 storage tanks; 12 vacuum breaker; 13 power supplys; 14 electric heaters.
Fig. 3 is a control flow chart of the present invention.
Wen Wendu hourly variation among Fig. 4 embodiment 1
Fig. 5 embodiment 2 high-temperature temperature hourly variations
Wen Wendu daily variation diagram among Fig. 6 embodiment 1
Fig. 7 embodiment 2 high-temperature temperature daily variation diagrams
Embodiment
Example 1: example 1 is one of embodiment of the present invention example, but this patent is not limited only to this.
The total surface area 10.414m in the greenhouse that the present invention adopts
2Solar water heater adopts the vacuum-tube heat-pipe water-heater, 24 lighting tubes is arranged, power 840W, 160 liters of water tanks.Reactor is anaerobic sequencing batch reactor (ASBR), is processed by carbon steel, and run parameter is: water inlet 15min, reaction 20h, precipitation 3.5h, water outlet 15min; Be 24h the working time of one-period.With clear water simulation anaerobic digestion material.Adopt pneumatic stirring, by air pump the gas of reactor head is extracted into bottom 1 time every 1h, gas is diffused in the water by the gaseous diffuser that is installed in the bottom and forms bubble and play agitaion.In reactor, inside and outside the greenhouse, in the solar water heater, the interchanger inlet and outlet pipe all is equipped with temperature sensor.All temperature sensors all link to each other with CR23X Data Detection registering instrument, and the temperature data of each point collection is sent in the Data Detection registering instrument, and by hot water heat transfer tube round-robin beginning and ending time, perdurability etc. in reactor in its control solar water heater.
Solar energy greenhouse, solar water heater, stabilizing control system, anaerobic digestion reaction vessel are arranged according to equipment flowsheet (Fig. 1).Inject clear water in the anaerobic digestion reaction vessel.Spring and autumn is taked anaeration in normal temperature digestion simulation test, and temperature is set 35 ℃, controls according to control flow chart (Fig. 2).According to the operation of ASBR technology, be 24h the working time of one-period, and guarantee to stir.Monitor in real time and control when diurnal temperature changes in one day, temperature variations in the anaerobic digestion reaction vessel makes it to reach efficient anaerobic digestion temperature requirement.Monitor in real time and control under the interior different weather condition in one period, temperature variations in the anaerobic digestion reaction vessel makes it to reach efficient anaerobic digestion temperature requirement.
In changing in the time of in typical one day, medial temperature maintains 32～37 ℃ in the time of in the anaerobic digestion reaction vessel, average 35.27 ℃, heats respond well.When weather condition were better, controlled temperature had reached middle temperature efficient anaerobic digestion temperature requirement fully.In the daily variation, although because three significantly fluctuations have appearred in the climate reasons envrionment temperature, mean daily temperature remains on 31～37 ℃, average 34.05 ℃ in the anaerobic digestion reaction vessel in one period.This system has regulating and controlling ability preferably to the climate change of spring and autumn, still can stablize by holding chamber internal reaction actuator temperature warm efficient anaerobic digestion temperature requirement in reaching fully when variation of ambient temperature is big.
Example 2: example 2 is one of embodiment of the present invention example, but this patent is not limited only to this.
Take the thermophilic digestion simulation test summer, temperature is set 50 ℃, and other is with example 1.
In changing in the time of in typical one day, medial temperature maintains 33～36 ℃ in the time of in the anaerobic digestion reaction vessel, average 35.27 ℃, heats respond well.When weather condition were better, controlled temperature had reached middle temperature efficient anaerobic digestion temperature requirement fully.In the daily variation, although because three significantly fluctuations have appearred in the climate reasons envrionment temperature, temperature remains on 31～36 ℃, average 34.05 ℃ in the anaerobic digestion reaction vessel in one period.This system has regulating and controlling ability preferably to the climate change of spring and autumn, still can stablize by holding chamber internal reaction actuator temperature warm efficient anaerobic digestion temperature requirement in reaching fully when variation of ambient temperature is big.
The wide geographic area day and night temperature of northern China is bigger, so Changing Pattern can be described the concrete changing conditions of temperature in one day internal reaction device during temperature.According to typical test, obtain the inside and outside reactor of solar energy greenhouse, inside and outside, the interior variation of hot water temperature in 24h of solar water heater in greenhouse, change when embodiment 1 and 2 temperature respectively as Fig. 4 (temperature in the spring and autumn, on October 25th, 2005,15 ℃ of Beijing, fine, mean daily temperatures), Fig. 5 (summer high temperature, on June 16th, 2006,30 ℃ of Beijing, fine, mean daily temperatures) shown in.
Solar energy system is subjected to weather influence bigger.When fine day, sun altitude is big, the sunshine duration is long, atmospheric transparency is good, and solar radiation quantity is big, and it is many that solar energy system obtains energy, the temperature height; Otherwise the cloudy day is then low.Therefore temperature daily variation rule can be described one section interior variation of temperature situation of internal reaction device in period.According to test, obtain the inside and outside reactor of solar energy greenhouse, inside and outside, the interior variation of hot water temperature in 15d of solar water heater in greenhouse, embodiment 1 and 2 temperature daily variations are respectively as Fig. 6 (temperature in the spring and autumn, the 10-11 month in 2005, Beijing), shown in Fig. 7 (summer high temperature, in June, 2006, Beijing).
Analyze as can be known by Fig. 4-7: during gentle summer high temperature anaerobic digestion is tested in spring and autumn, the energy abundance that the solar heating system obtains, and be fully used.This system has regulating and controlling ability preferably to the climate change of spring and autumn.Still can stablize by holding chamber internal reaction actuator temperature when variation of ambient temperature is big, wherein the digestion trial of spring and autumn anaeration in normal temperature is at 31 ~ 37 ℃, and average 34 ℃, the summer high temperature anaerobic digestion is tested at 42 ~ 55 ℃, average 50 ℃, can reach efficient anaerobic digestion temperature requirement.
Claims (2)
1, a kind of anaerobic digestion greenhouse-solar water heater combination heating device comprises that storage tank (11) connects fresh feed pump (8), and fresh feed pump (8) connects digestion reactor (3); Gaseous diffuser (6) is placed in the digestion reactor (3), and gaseous diffuser (6) connects air pump (9), and air pump (9) forms a gas circulation loop by pipe connection to digestion reactor (3); It is characterized in that, also include the two parts, the one, greenhouse (2), a solar water heater (1) is set outside greenhouse (2), digestion reactor (3) is placed in the greenhouse (2), temperature sensor (5) I puts into solar water heater (1), temperature sensor (5) II puts into digestion reactor (3), temperature sensor (5) I is connected controller (4) respectively with temperature sensor (5) II, controller (4) connects hot water pump (10), and hot water pump (10) connects solar water heater (1) respectively and is placed on the loop that interchanger (7) in the digestion reactor (3) forms a water and is used for heat supplied; Place interchanger (7) in digestion reactor (3), this interchanger connects hot water pump (10) and solar water heater (1) forms a hot water circulation loop.
2, a kind of anaerobic digestion according to claim 1 greenhouse-solar water heater combination method for increasing temperature is characterized in that, may further comprise the steps:
1) beginning: connect hot water pump (10) power supply, the power supply of controller (4) is adjusted controller (4) program and is brought into operation;
2) temperature sensor (5) I and temperature sensor (5) II begin reading, data are sent and are stored in to controller (4), controller (4) judges whether the interior digestion reactor in greenhouse (2) (3) temperature reaches design temperature 1, and wherein 1 summer of design temperature is 50 ℃, 35 ℃ of spring and autumns;
3) if reach design temperature 1, EP (end of program); If not, judge whether the difference of solar water heater (1) temperature and the interior digestion reactor in greenhouse (2) (3) temperature reaches design temperature 2, wherein design temperature 2 is not less than 3 ℃ again;
4) if the difference of temperature does not reach design temperature 2, EP (end of program); If reach design temperature 2, hot water pump (10) starts;
5) after hot water pump (10) starts, judge whether the temperature of digestion reactor (3) reaches design temperature 3; Wherein: 3 summers of design temperature are 50-52 ℃, spring and autumn 35-37 ℃;
6) if the temperature of digestion reactor (3) reaches design temperature 3, EP (end of program); If not, judge again whether hot water pump (10) working hour reaches setting-up time 1; Wherein setting-up time 1 is got 30-40 second;
7) in setting-up time 1, hot water pump (10) is worked always, judges whether the temperature of digestion reactor (3) reaches design temperature 3; If, EP (end of program); If not, and hot water pump (10) work surpasses setting-up time 1, and hot water pump (10) temporarily stops setting-up time 2, returns step 2 then); Wherein: setting-up time 2 was got 4-6 minute;
The instant always reading of temperature sensor in the whole process (5) I, II.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101665304B (en) * | 2009-09-29 | 2011-05-04 | 河北农业大学 | Solar Anaerobic Granular Sludge Circulating Reactor |
| CN102070289A (en) * | 2010-12-10 | 2011-05-25 | 河南农业大学 | Solar auxiliary heating methane production device |
| CN102399691A (en) * | 2010-09-17 | 2012-04-04 | 刘贵堂 | Novel energy-saving methane pool |
| CN103831284A (en) * | 2014-03-11 | 2014-06-04 | 湖州铁佛耐火材料有限公司 | Fermentation system |
| CN104129849A (en) * | 2014-07-10 | 2014-11-05 | 陕西科技大学 | Anaerobic reactor treatment system |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2358081Y (en) * | 1998-08-06 | 2000-01-12 | 王晓凯 | Solar methane generator |
| KR100356146B1 (en) * | 2000-02-23 | 2002-10-19 | 손상목 | year-round anaerobic fermentation of organic waste treatment apparatus for methane gas production by heating water source from outside |
| CN2644431Y (en) * | 2003-07-30 | 2004-09-29 | 赵衍庚 | Solid fermentation production plant for feed yeast |
| CN2769276Y (en) * | 2005-02-07 | 2006-04-05 | 仁化县农业技术推广中心 | Temperature-sensing and electric control solar energy auxiliary fermenting methane apparatus |
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2006
- 2006-11-03 CN CNB2006101142560A patent/CN100457886C/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101665304B (en) * | 2009-09-29 | 2011-05-04 | 河北农业大学 | Solar Anaerobic Granular Sludge Circulating Reactor |
| CN102399691A (en) * | 2010-09-17 | 2012-04-04 | 刘贵堂 | Novel energy-saving methane pool |
| CN102070289A (en) * | 2010-12-10 | 2011-05-25 | 河南农业大学 | Solar auxiliary heating methane production device |
| CN103831284A (en) * | 2014-03-11 | 2014-06-04 | 湖州铁佛耐火材料有限公司 | Fermentation system |
| CN103831284B (en) * | 2014-03-11 | 2015-10-21 | 湖州铁佛耐火材料有限公司 | A kind of fermentation system |
| CN104129849A (en) * | 2014-07-10 | 2014-11-05 | 陕西科技大学 | Anaerobic reactor treatment system |
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| CN100457886C (en) | 2009-02-04 |
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