CN108424936A - A kind of method and system of Chinese medicine slag hydro-thermal process combined anaerobic digestion methane phase - Google Patents
A kind of method and system of Chinese medicine slag hydro-thermal process combined anaerobic digestion methane phase Download PDFInfo
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- 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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- C12M21/00—Bioreactors or fermenters specially adapted for specific uses
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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Abstract
The present invention discloses a kind of method and system of Chinese medicine slag hydro-thermal process combined anaerobic digestion methane phase.Include the following steps：Step (1) carries out break process to Chinese medicine slag, obtains the Chinese medicine solid impurity particle of certain grain size；Step (2), to the Chinese medicine solid impurity particle hydro-thermal process of acquisition, obtains hydrolysate and the remaining dregs of a decoction using hydrothermal reactor；Step (3) carries out Anaerobic Digestion using anaerobic digestion reaction vessel to hydrolysate and the remaining dregs of a decoction, obtains biogas.The present invention utilizes the high reaction activity that water has under certain high-temperature and high-pressure conditions, the macromoleculars organic matters such as the higher and difficult to degrade cellulose of content in Chinese medicine slag, hemicellulose are hydrolyzed, and it is converted into degradable water soluble products, by carrying out hydro-thermal process to Chinese medicine slag, improve Chinese medicine slag anaerobic digestion performance, the hydraulic detention time for shortening anaerobic digestion, improves the organic loading of Chinese medicine slag, and the final biogas that improves generates rate and yield.
Description
Technical field
The present invention relates to the invention belongs to Solid Waste Treatment technical field more particularly to a kind of Chinese medicine slag hydro-thermal process connection
Close the method and system of anaerobic digestion methane phase.
Background technology
Chinese medicine production is China's tradition and a kind of distinctive industry, and by 2015, China, which has traditional Chinese medicine enterprise, 1636
Family accounts for the 32% of pharmaceuticals industry sum.Chinese medicine is in process of production by the techniques such as decoction and fermentation to extract pharmaceutical composition, most
It will produce a large amount of dregs of a decoction eventually, the annual dregs of a decoction yield in China is more than 30,000,000 tons.
Chinese medicine slag mainly has the characteristics that：1, moisture content is high, generally 70% or more；2, the content of organic matter is high, is rich in
N, the inorganic nutritive elements such as P, K；3, main component is not degradable and difficult to degrade big such as cellulose, hemicellulose and lignin
Molecular organic.The predominantly simple stacking of early stage domestic Chinese medicine slag method of disposal and landfill, but since rainwater drenches in stacking process
It is molten, easily cause periphery surface water, underground water and soil pollution.In addition, Chinese medicine slag is generally the higher biomass material of moisture content,
A large amount of VOCs can be discharged in perishable and putrefaction process, cause atmosphere pollution.In recent years, the processing method of Chinese medicine slag was gradually opened up
Exhibition is the methods of land use, burning, pyrolysis and anaerobic digestion.Although Chinese medicine slag is rich in the nutrients such as N, P, K, soil profit
With need to pass through broken, dehydration, sterilization, and medicament residue may be that crops and human body bring safety problem；According to
It burns and the processing of the heat treatment modes such as pyrolysis is disposed, need by dehydration and drying process, energy consumption is higher, and meeting in burning process
Generate SOxAnd NOxEqual pollutants.Anaerobic digestion techniques are that organic matter is lived by the metabolism of microorganism under anaerobic in the dregs of a decoction
Process that is dynamic and being converted into methane and carbon dioxide, and cellulose and hemicellulose are hard-degraded substance in the dregs of a decoction, are directly detested
The period of oxygen digestion is longer.
In conclusion if the recycling of the useless dregs of a decoction, innoxious and minimizing, need further to develop scientific and effective processing
Method and system.
Invention content
In view of the above-mentioned problems, the present invention provides a kind of method of dregs of a decoction hydro-thermal process combined anaerobic digestion methane phase and is
System.
In order to achieve the above objectives, a kind of method of Chinese medicine slag hydro-thermal process combined anaerobic digestion methane phase of the present invention, it is special
Sign is, includes the following steps：Step (1) carries out break process to Chinese medicine slag, obtains the Chinese medicine solid impurity particle of certain grain size；
Step (2), to the Chinese medicine solid impurity particle hydro-thermal process of acquisition, obtains hydrolysate and remaining medicine using hydrothermal reactor
Slag；
Step (3) carries out Anaerobic Digestion using anaerobic digestion reaction vessel to hydrolysate and the remaining dregs of a decoction, obtains natural pond
Gas.
Further, the particle size range of Chinese medicine solid impurity particle is 10-150mm in the step (1).
Further, when carrying out hydro-thermal process in the step (2), 60 are risen to the heating rate of 0.15~2.5 DEG C/s
~270 DEG C, and keep 10~30min；
When carrying out hydro-thermal process, the working pressure range of hydrothermal reactor is 0.4~1.6Mpa.
Further, further include that strong stirring processing is carried out to Chinese medicine slag particle, so that Chinese medicine slag homogenizes.
Further, further include that heat exchange processing is carried out so that Chinese medicine slag is cooled to 20~25 to Chinese medicine slag after hydro-thermal process
℃。
Further, when carrying out Anaerobic Digestion, anaerobic digestion temperature is 30~40 DEG C, and the residence time is 12~20d,
It is 20 that carbon source guarantee, which meets C/N,:1~30:1, pH is 7~8.
The method of Chinese medicine slag hydro-thermal process combined anaerobic digestion methane phase of the present invention, using water in certain high temperature and pressure item
The high reaction activity having under part, the macromoleculars such as the higher and difficult to degrade cellulose of content in Chinese medicine slag, hemicellulose are organic
Matter hydrolyzes, and is converted into degradable water soluble products.By carrying out hydro-thermal process to Chinese medicine slag, Chinese medicine slag anaerobic digestion can be improved
Performance shortens the hydraulic detention time of anaerobic digestion, improves the organic loading of Chinese medicine slag, and the final biogas that improves generates rate and production
Raw amount.
In order to achieve the above object, a kind of system of Chinese medicine slag hydro-thermal process combined anaerobic digestion methane phase of the present invention, including it is broken
Broken machine, batch mixer, hydrothermal reactor and anaerobic digestion reaction vessel；The crusher is used to carry out break process, institute to Chinese medicine slag
The discharge port for stating crusher is connected to by belt conveyor with the feed inlet of the batch mixer, and the discharge port of the batch mixer passes through
Belt conveyor is connected to the feed inlet of the hydrothermal reactor, and the discharge port of the hydrothermal reactor and the digestion anaerobic are anti-
The feed inlet of device is answered to be connected to.
Further, further include double film gas storage holder, the air inlet pipe of double film gas storage holders passes through air shooter and anaerobism
The gas outlet of digestion reactor is connected to.
Further, further include dehydration device and desulfurizer and generating set, the gas outlet of double film gas storage holders
It is connected to successively with dehydration device air inlet by pipeline, the air inlet that the gas outlet of the dehydration device passes through pipeline and desulfurizer
Mouth connection, the gas outlet of the desulfurizer is connected to the air inlet of generating set.
Further, further include deodorization device, exhaust outlet, the deodorization device are provided on the side wall of batch mixer containing tube
Air inlet be connected to the exhaust outlet.
Further, it is provided with relief valve at the gas outlet of the hydrothermal reactor.
The system treatment effeciency of Chinese medicine slag hydro-thermal process combined anaerobic digestion methane phase of the present invention is high, and equipment volume is small, this
Invention avoids the latent heat losses in drying process, can utmostly realize the recycling of Chinese medicine slag.
Specific implementation mode
Embodiment 1
A kind of method of Chinese medicine slag hydro-thermal process combined anaerobic digestion methane phase is provided in the present embodiment, including is walked as follows
Suddenly：Step (1) carries out break process to Chinese medicine slag, obtains the Chinese medicine solid impurity particle that particle size range is 10-150mm；Again by Chinese medicine slag
Particle is sent into through belt conveyor in mixing tank for coating colors, and material homogenizes under strong stirring；
Step (2) carries out hydro-thermal process using hydrothermal reactor to the Chinese medicine slag after homogenizing, and obtains hydrolysate and remains
The remaining dregs of a decoction；When hydro-thermal process, 60~270 DEG C are risen to the heating rate of 0.15~2.5 DEG C/s, and keep 10~30min；Into
Further include that high steam is passed through into hydrothermal reactor to improve hydrothermal reactor operating pressure extremely when row hydro-thermal process
1.6Mpa；
Step (3) carries out Anaerobic Digestion using anaerobic digestion reaction vessel to hydrolysate and the remaining dregs of a decoction, obtains first
Alkane；When carrying out Anaerobic Digestion, anaerobic digestion temperature is 30~40 DEG C, and the residence time is 12~20d, and carbon source guarantee meets C/
N is 20:1~30:1, pH is 7~8.
Specifically, further including to further including carrying out heat exchange processing to Chinese medicine slag after hydro-thermal process, so that Chinese medicine slag is cooled to
20~25 DEG C.
The method of Chinese medicine slag hydro-thermal process combined anaerobic digestion methane phase of the present invention, using water in certain high temperature and pressure item
The high reaction activity having under part, the macromoleculars such as the higher and difficult to degrade cellulose of content in Chinese medicine slag, hemicellulose are organic
Matter hydrolyzes, and is converted into degradable water soluble products.By carrying out hydro-thermal process to Chinese medicine slag, Chinese medicine slag anaerobic digestion can be improved
Performance shortens the hydraulic detention time of anaerobic digestion, improves the organic loading of Chinese medicine slag, the final generation rate for improving biogas and
Yield.
Embodiment 3
The present embodiment provides a kind of system of Chinese medicine slag hydro-thermal process combined anaerobic digestion methane phase, including it is crusher, mixed
Material machine, hydrothermal reactor, anaerobic digestion reaction vessel, double film gas storage holders, dehydration device, desulfurizer and generating set；It is broken
The charging that machine passes through belt conveyor and the batch mixer for the discharge port to Chinese medicine slag progress break process, the crusher
Mouth connection, the discharge port of the batch mixer are connected to by belt conveyor with the feed inlet of the hydrothermal reactor, the hydro-thermal
The discharge port of reactor is connected to the feed inlet of the digestion anaerobic reactor.
Wherein, the air inlet pipe of double film gas storage holders is connected to by air shooter with the gas outlet of anaerobic digestion reaction vessel.It is double
The gas outlet of film gas storage holder is connected to dehydration device air inlet successively by pipeline, and the gas outlet of the dehydration device passes through pipeline
It is connected to the air inlet of desulfurizer, the gas outlet of the desulfurizer is connected to the air inlet of generating set.
Preferably, further including deodorization device in the present embodiment, exhaust outlet is provided on the side wall of batch mixer containing tube, it is described
The air inlet of deodorization device is connected to the exhaust outlet.
The gas outlet of hydrothermal reactor goes out to be provided with relief valve in the present embodiment.Pass through the relief valve of setting, hydro-thermal process
React the predetermined time when valve open, Chinese medicine slag because pressure drop and rapid spatial expansion, intracellular vapor make cell
Wall bursts, while discharging organic matter, and Chinese medicine slag is further cooled to 20~25 DEG C after heat exchanger after hydro-thermal process.
The present embodiment, Chinese medicine slag is after the processing of hydrothermal reactor and anaerobic digestion reaction vessel, and organic matter is micro- in the dregs of a decoction
Methane, carbon dioxide, hydrogen sulfide and moisture are converted under biological effect, by dehydration device will wherein moisture removal, then through de-
Sulphur device will wherein hydrogen sulfide removal, be finally delivered in double film gas storage holders and store.
The system treatment effeciency of Chinese medicine slag hydro-thermal process combined anaerobic digestion methane phase of the present invention is high, and equipment volume is small, this
Invention avoids the latent heat losses in drying process, can utmostly realize the recycling of Chinese medicine slag.
More than, only presently preferred embodiments of the present invention, but scope of protection of the present invention is not limited thereto, and it is any to be familiar with sheet
In the technical scope disclosed by the present invention, the change or replacement that can be readily occurred in should all be covered those skilled in the art
Within protection scope of the present invention.Therefore, the scope of protection of the present invention shall be subject to the scope of protection defined by the claims.
Claims (7)
1. a kind of method of Chinese medicine slag hydro-thermal process combined anaerobic digestion methane phase, which is characterized in that include the following steps：Step
(1) break process is carried out to Chinese medicine slag, obtains the Chinese medicine solid impurity particle of certain grain size；
Step (2), to the Chinese medicine solid impurity particle hydro-thermal process of acquisition, obtains hydrolysate and the remaining dregs of a decoction using hydrothermal reactor；
Step (3) carries out Anaerobic Digestion using anaerobic digestion reaction vessel to hydrolysate and the remaining dregs of a decoction, obtains biogas.
2. a kind of method of Chinese medicine slag hydro-thermal process combined anaerobic digestion methane phase according to claim 1, feature exist
In the particle size range of Chinese medicine solid impurity particle is 10-150mm in the step (1).
3. a kind of method of Chinese medicine slag hydro-thermal process combined anaerobic digestion methane phase according to claim 1, feature exist
When carrying out hydro-thermal process in, the step (2), 60~270 DEG C are risen to the heating rate of 0.15~2.5 DEG C/s, and keep
10~30min；
When carrying out hydro-thermal process, the working pressure range of hydrothermal reactor is 0.4~1.6Mpa.
4. a kind of method of Chinese medicine slag hydro-thermal process combined anaerobic digestion methane phase according to claim 1, feature exist
In, further include to Chinese medicine slag particle carry out strong stirring processing so that Chinese medicine slag homogenizes.
5. a kind of method of Chinese medicine slag hydro-thermal process combined anaerobic digestion methane phase according to claim 1, feature exist
In, further include after hydro-thermal process to Chinese medicine slag carry out heat exchange processing so that Chinese medicine slag is cooled to 20~25 DEG C.
6. a kind of method of Chinese medicine slag hydro-thermal process combined anaerobic digestion methane phase according to claim 1, feature exist
In when carrying out Anaerobic Digestion, anaerobic digestion temperature is 30~40 DEG C, and the residence time is 12~20d, and carbon source guarantee meets C/
N is 20:1~30:1, pH is 7~8.
7. a kind of system of Chinese medicine slag hydro-thermal process combined anaerobic digestion methane phase according to claim 1, feature exist
In, including crusher, batch mixer, hydrothermal reactor and anaerobic digestion reaction vessel；The crusher is for breaking Chinese medicine slag
The discharge port of broken processing, the crusher is connected to by belt conveyor with the feed inlet of the batch mixer, the batch mixer
Discharge port is connected to by belt conveyor with the feed inlet of the hydrothermal reactor, the discharge port of the hydrothermal reactor with it is described
The feed inlet of digestion anaerobic reactor is connected to.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110779947A (en) * | 2019-11-25 | 2020-02-11 | 北京化工大学 | Method for evaluating anaerobic digestion performance of lignocellulose raw material by pretreatment intensity |
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Application publication date: 20180821 |