CN102835261A - Application of residual waste gas after biogas purification as gas fertilizer - Google Patents
Application of residual waste gas after biogas purification as gas fertilizer Download PDFInfo
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- CN102835261A CN102835261A CN2012103420053A CN201210342005A CN102835261A CN 102835261 A CN102835261 A CN 102835261A CN 2012103420053 A CN2012103420053 A CN 2012103420053A CN 201210342005 A CN201210342005 A CN 201210342005A CN 102835261 A CN102835261 A CN 102835261A
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- gas
- biogas
- carbonic acid
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- artificial cultivation
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Abstract
The invention discloses an application of residual carbon dioxide-enriched waste gas after biogas purification as a gas fertilizer for an artificial cultivation system. The application provided by the invention solves the treatment problem of the waste gas produced during biogas purification, and provides a way for solving insufficient carbon source for plant photosynthesis in the artificial cultivation system.
Description
Technical field
The invention belongs to the comprehensive utilization category of biogas energy in the biomass energy, be specifically related to a kind of waste gas that is rich in carbonic acid gas that biogas purification back is remaining as the fertile purposes of artificial cultivation system gas.
Background technology
In recent years, along with to energy quality and the raising that utilizes mode to require, change has been taken place also for the mode of utilizing of biogas, biogas is purified important all the more.The biogas purification technique is about to the technology that methane separates with gases such as carbonic acid gas, water, hydrogen sulphide in the biogas; It is that the higher value application that is directed against this new forms of energy of biogas grows up; Through separation and concentration, the methane content in the biogas can reach 97%-99%, and its calorific value significantly improves.Main biogas purification technique comprises at present: chemical absorption method, WATER-WASHING METHOD, pressure swing adsorption method, membrane separation process.
Chinese scholars is directed against the biogas purification technique and has carried out a large amount of research, utilizes problem again but remain the waste gas that is rich in carbonic acid gas after in research raising fire damp purity, having ignored the biogas purification.Chemical absorption method, WATER-WASHING METHOD, membrane separation process carry out the biogas Study on Purification and all do not mention the enrichment of carbonic acid gas and utilize in existing research; Although pressure swing adsorption technique can be realized the enrichment of carbonic acid gas; And purity can reach 99.5%, but most with it as waste discharge.For example publication number is in the patent of invention of CN101837227A, only with carbon dioxide enriched in absorption liquid, and in the not mentioned recovery tower carbonic acid gas collection with utilize problem.These exhaust gas discharging had both caused the waste of carbonic acid gas resource, had increased the weight of greenhouse effect again.
Along with country's agricultural organic waste suddenly pending utilization increasingly high and a large amount of to the attention degree of new forms of energy; Biogas industry in the biomass energy is fast-developing; The biogas purification technique will obtain significant progress; The carbonic acid gas resource that thereupon produces is very huge and valuable, should further strengthen about the utilization of these carbon resources.
On the other hand, the effect of industrialized agriculture in national life is produced is important all the more, and particularly the artificial cultivation system has played critical effect to the increasing both production and income that guarantees agricultural.But in airtight relatively artificial cultivation system and since plant when carrying out photosynthesis to a large amount of absorption and assimilation of carbonic acid gas, make that carbon source is not enough in the system, badly influenced the growth of plant.To execute carbonic acid gas very obvious to the production-increasing function of crop and in green house of vegetables, artificial greenhouse or plant factor, increase; Generally can reach 30%; Can be for agricultural production bring considerable economic well-being of workers and staff, so carbon-dioxide gasfertilizer increases the technology of executing and has obtained development faster.
Carbon-dioxide gasfertilizer increases applying method at present roughly has following several kinds:
(1) chemical reaction method: chemical reaction method is a method comparatively commonly used, and its principle is to utilize carbonate and strong acid reaction to generate carbonic acid gas.And this method exists that cost is high, gas concentration lwevel duration short (having only 1-2 h usually), defective such as when taking a lot of work, thereby has limited extensive popularization and the application in agricultural production.
(2) pure carbon dioxide increases and excutes a law: this method generally is to utilize the bottled carbonic acid gas of high pressure to increase to execute, and can control concentration and changes in flow rate preferably, but with high costs.
(3) soil chemistry method: this method generally is through apply fertilizer such as carbon ammonium in the field; Utilize its natural decomposition release of carbon dioxide; The method is easy and simple to handle, cost is low; Also increase in the time of release of carbon dioxide and executed nitrogenous fertilizer, but gas concentration lwevel is wayward, and cause ammonia to poison easily.
(4) the simple and easy fermentation method of debirs: publication number is that the patent of invention of CN1582623A proposes this method; Promptly agricultural organic waste is directly fermented in booth through simple and easy installation for fermenting; Produce carbonic acid gas and release; Can fully utilize agricultural wastes, but also produce gases such as methane, hydrogen sulphide, ammonia during release of carbon dioxide in the fermentation process, the growth of crop is exerted an influence.
(5) other: except that said method; Also have firing method, ventilation method etc.; Firing method is through the debirs release of carbon dioxide of directly burning; This method not only is difficult to the control concentration of carbon dioxide, and in combustion process, can produce air pollutant such as sulphur dioxide, flying dust, influences plant growth; The ventilation method is with low cost, but is difficult to the control gas concentration lwevel, more is difficult to reach 800 μ LL
-1, also can influence variation of temperature in the greenhouse simultaneously.
Through above-mentioned two aspect analyses, can find out with the biogas remaining waste gas that is rich in carbonic acid gas in back of purifying fertilely as gas, not only effectively utilized the biogas remaining waste gas in back of purifying, and new source of the gas is provided for chamber crop cultivation.
Summary of the invention
The invention provides the remaining waste gas that is rich in carbonic acid gas in a kind of back of will purifying as the fertile purposes of artificial cultivation system gas; Its concrete steps are: the waste gas that contains carbonic acid gas that is produced in the biogas purification process is carried out enrichment and is stored in the air accumulator; When hydrogen sulfide content is greater than 10ppm in this remainder of exhaust gas, remainder of exhaust gas is fed the desulfurization treatment fluid carry out the desulfurization processing; When ammonia level during, carry out deamination in the deamination device during gas fed and handle greater than 5ppm; The gas that will pass through at last after the desulfurization deamination is handled feeds gas distribution system, and cloth imposes on (like green house of vegetables, artificial greenhouse or plant factor etc.) in the artificial cultivation system.Adjust gas concentration lwevel in the artificial cultivation system according to the mode of crop stabilizing carbon dioxide in the artificial cultivation system, compensation point of carbon dioxide and the saturation point of crop, to guarantee carbon supplied sufficient in the photosynthesis of plant process.
The gas concentration lwevel controlling value is mainly confirmed by the mode of crop stabilizing carbon dioxide in the artificial cultivation system, compensation point of carbon dioxide and the saturation point that crop is had under Current Temperatures, illumination, moisture condition in the artificial cultivation system.To C3 crops such as tomato, cucumber, capsicums, the gas concentration lwevel control range is generally 400ppm-1400ppm.
Wherein said biogas, its preparation method comprise wet type anaerobic digestion, dry anaerobic digestion method, single-phase anaerobic digestion, TPAD method etc., and the above-mentioned NM method of utilizing the biomass waste anaerobic digestion to produce biogas.
Wherein said biogas method of purification comprises that WATER-WASHING METHOD, pressure swing adsorption method, membrane separation process etc. can be with methane isolated methods from biogas.
Wherein said waste gas is meant biogas remaining gas behind the removal methane of purifying, and key component is carbonic acid gas (30%-60%), and other components comprise nitrogen, methane, hydrogen sulphide, ammonia, hydrogen, water, oxygen, carbon monoxide etc.
Wherein said gas distribution system comprises even distributing gas distribution system, centralized gas distribution system etc., and is wherein best with even distributing gas distribution system effect.
Carbonic acid gas gas distribution gas flow in the wherein said uniformly dispersing formula gas distribution system is counted 0.5 m with carbonic acid gas
3/ h-1m
3/ h, average every 10.8m
3-21 m
3The space lay a cloth gas port.
Wherein said artificial cultivation system comprises green house of vegetables, artificial greenhouse, plant factor etc.
The present invention has following advantage:
(1) will be used as residual gas after the biogas purification of being rich in carbonic acid gas of toxic emission in the past, it will be carried out the carbon fertilising as carbon source, comprehensively realize the comprehensive utilization of biogas.
(2) the reasonable utilization of carbonic acid gas has reduced the discharging of greenhouse gases, has realized carbon cycle.
Embodiment
(1) waste gas resource: employed biogas derives from the changing food waste two-phase anaerobic digestion system in the present embodiment; The waste gas that uses comes from transformation WATER-WASHING METHOD methane purification system, and carbon dioxide content is that 38%-45%, nitrogen are that 25%-30%, methane are that 1%-3%, oxygen are that 20%-35%, hydrogen sulphide are that 3ppm-5ppm, ammonia are 1ppm-2ppm, hydrogen 1%-2% in the waste gas.
(2) crop genetics system: select two cover fluorescent lamp chamber crop cultivation systems (system A and the B of system) for use, every cover greenhouse system space is of a size of 3m * 3.2m * 3.5m, and the gas distribution pipeline at system top is used to discharge the waste gas that is fed.Term harmonizations such as temperature, humidity, intensity of illumination, resh air requirement in system A and the B of system, day temperature are that 26 ± 3 ℃, nocturnal temperature are that 19 ± 2 ℃, humidity are 60% ± 20%.
(3) gas distribution system: laid four cloth gas ports in the present embodiment in each cultivation system respectively, two-layer about being divided into, the upper strata terrain clearance is 2m, and following layer height terrain clearance is 0.75m, and gas distribution implication amount flow is 0.8 m
3/ h.
(4) carbonic acid gas increases and executes effect: through the work of gas concentration lwevel probe, magnetic valve and computer software control gas distribution system; Thereby concentration of carbon dioxide in the control greenhouse system, wherein the gas concentration lwevel fluctuation range is 400 ± 50ppm (μ LL among the A of system
-1), among the system B 800 ± 50ppm (μ LL
-1).
(5) crop yield effect: investigating crop in this enforcement is tomato, and kind mixes 105 in being.Increase and execute the quality that carbonic acid gas can improve tomato, the soluble sugar content under 800ppm concentration is handled in the tomato has improved 28% under handling than 400ppm concentration, and Vitamin C content, soluble solid content have improved 16%, 34% respectively.Organic acid content then reduces by 25%.800ppm concentration is handled down, and the tomato gross yield increases by 16% than 400ppm.
When being understood that; Specific embodiment of the present invention only is a property illustrative purposes presented for purpose of illustration; It limits protection scope of the present invention never in any form; Those skilled in the art can improve or conversion according to above-mentioned explanation, and all these improvement and conversion all should belong to the protection domain of accompanying claims of the present invention.
Claims (9)
1. biogas is purified the remaining waste gas that is rich in carbonic acid gas in back as the fertile purposes of artificial cultivation system gas, it is characterized in that biogas is separated the methane of purifying out, and remaining waste gas is stored in the air accumulator through enrichment; Remainder of exhaust gas is fed the desulfurization treatment fluid to carry out desulfurization and handles and to make that hydrogen sulfide content is less than 10ppm in the remainder of exhaust gas; Gas fed carry out deamination in the deamination device and handle and to make that ammonia level is less than 5ppm in the remainder of exhaust gas; The gas that will pass through after the desulfurization deamination is handled feeds gas distribution system, and cloth imposes in the artificial cultivation system.
2. according to claims 1 described purposes, the preparation method of biogas is selected from wet type anaerobic digestion, dry anaerobic digestion method, single-phase anaerobic digestion, TPAD method and utilizes the biomass waste anaerobic digestion to produce one or more methods in the method for biogas.
3. according to claims 1 described purposes, it is characterized in that gas concentration lwevel is between 400ppm-1400ppm in the artificial cultivation system.
4. according to claims 1 described purposes, it is characterized in that the biogas method of purification is selected from one or more the combination in WATER-WASHING METHOD, pressure swing adsorption method, the membrane separation process.
5. according to claims 1 described purposes; It is characterized in that waste gas is meant biogas remaining gas behind the removal methane of purifying; Key component is carbonic acid gas (30%-60%), and other components comprise nitrogen, methane, hydrogen sulphide, ammonia, hydrogen, water, oxygen, carbon monoxide.
6. according to claims 1 described purposes, it is characterized in that gas distribution system comprises even distributing gas distribution system, centralized gas distribution system.
7. according to claims 6 described purposes, it is characterized in that gas distribution system is even distributing gas distribution system, the carbonic acid gas gas distribution gas flow in the uniformly dispersing formula gas distribution system is counted 0.5 m with carbonic acid gas
3/ h-1m
3/ h, average every 10.8m
3-21 m
3The space lay a cloth gas port.
8. according to claims 1 described purposes, it is characterized in that the artificial cultivation system is selected from green house of vegetables, artificial greenhouse, plant factor.
9. biogas is purified the back remaining waste gas that is rich in carbonic acid gas as the purposes of artificial cultivation system gas fertilizer in improving tomato yield and/or Vitamin C content.
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| CN2012103420053A CN102835261A (en) | 2012-09-17 | 2012-09-17 | Application of residual waste gas after biogas purification as gas fertilizer |
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|---|---|---|---|
| CN2012103420053A CN102835261A (en) | 2012-09-17 | 2012-09-17 | Application of residual waste gas after biogas purification as gas fertilizer |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106268236A (en) * | 2016-09-30 | 2017-01-04 | 扬州大学 | A kind of compost reaction fuel gas efficient purifying, collecting device |
| CN107266141A (en) * | 2017-05-24 | 2017-10-20 | 沈阳富碳农业科技有限公司 | A kind of inorganic organic carbon dioxide is combined gas fertilizer and its application |
| CN108753843A (en) * | 2018-06-27 | 2018-11-06 | 中节能绿碳（遵义）环保有限公司 | A kind of preparation method and administration system of carbon-dioxide gasfertilizer |
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| CN108753843A (en) * | 2018-06-27 | 2018-11-06 | 中节能绿碳（遵义）环保有限公司 | A kind of preparation method and administration system of carbon-dioxide gasfertilizer |
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Application publication date: 20121226 |