CN110143740A - Waste agronomic crop and Method for comprehensive treatment of sludge and its application - Google Patents
Waste agronomic crop and Method for comprehensive treatment of sludge and its application Download PDFInfo
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- CN110143740A CN110143740A CN201910491014.0A CN201910491014A CN110143740A CN 110143740 A CN110143740 A CN 110143740A CN 201910491014 A CN201910491014 A CN 201910491014A CN 110143740 A CN110143740 A CN 110143740A
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/02—Biological treatment
- C02F11/04—Anaerobic treatment; Production of methane by such processes
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/10—Treatment of sludge; Devices therefor by pyrolysis
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E50/00—Technologies for the production of fuel of non-fossil origin
- Y02E50/30—Fuel from waste, e.g. synthetic alcohol or diesel
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Hydrology & Water Resources (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Health & Medical Sciences (AREA)
- General Chemical & Material Sciences (AREA)
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- Chemical Kinetics & Catalysis (AREA)
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- Treatment Of Sludge (AREA)
Abstract
The present invention relates to a kind of waste agronomic crop and Method for comprehensive treatment of sludge and its application, waste agronomic crop and Method for comprehensive treatment of sludge obtain high-temperature-hot-water solution sludge the following steps are included: by sludge in the first temperature progress pyrohydrolysis；Waste agronomic crop is subjected to Anaerobic Digestion, wherein the thermal energy that waste agronomic crop carries out Anaerobic Digestion comes from thermal energy possessed by high-temperature-hot-water solution sludge.Thermal energy possessed by high-temperature-hot-water solution sludge is dexterously applied in the processing of waste agronomic crop by the above method, on the one hand can need additional heating to avoid waste agronomic crop and caused by energy consumption；On the other hand can also be needed to avoid high-temperature-hot-water solution sludge it is additional cooling equipment is set to cool down, caused by the wasting of resources, it is energy saving, processing cost is greatly lowered.
Description
Technical field
The present invention relates to Waste Disposal Technology field, in particular to waste agronomic crop and Method for comprehensive treatment of sludge and its
Using.
Background technique
China is that the crop yields such as large agricultural country, such as straw, wheat straw, corn stalk, sorghum and rape are huge, but utilize
Rate is not high, usually takes it and measures such as abandons, burns, and causes the serious wasting of resources.With resource circulation utilization idea
Reinforcement, many areas start to handle waste agronomic crop, apply more for Anaerobic Digestion, that is, utilize at present
Anaerobe decomposes organic matter in waste agronomic crop, generates the process of biogas etc., this method can will discard organic
The low-grade biological energy source of object is converted into the high-grade biogas that can directly utilize, and the waste through Anaerobic Digestion can be made
For agricultural fertilizer, feed or Composting raw material etc., the recycling rate of waterused of resource is significantly enhanced.Since Anaerobic Digestion is main
It is the degradation using microorganism, therefore temperature control is particularly important during this, therefore usually requires first discard
Crops are heated to predetermined temperature, calculate by general technology, and temperature is 10 DEG C or so after stalk pretreatment, solid content 10%,
Every processing 1t stalk, if digestion reaction needs to be warming up to 33 DEG C, required heat is 1176MJ/d, needs a large amount of energy
Consumption, processing cost are higher.
Summary of the invention
Based on this, it is necessary to provide a kind of environmentally protective and inexpensive waste agronomic crop and Method for comprehensive treatment of sludge
And its application.
A kind of waste agronomic crop processing method, comprising the following steps:
Sludge is subjected to pyrohydrolysis in the first temperature, obtains high-temperature-hot-water solution sludge；
The waste agronomic crop is subjected to Anaerobic Digestion, wherein the waste agronomic crop carries out the anaerobic digestion
The thermal energy of processing comes from thermal energy possessed by the high-temperature-hot-water solution sludge.
In one embodiment, by the waste agronomic crop carry out Anaerobic Digestion the step of the following steps are included:
The high-temperature-hot-water solution sludge and the waste agronomic crop are mixed by predetermined weight ratio, obtain temperature in the second temperature
The crops mud mixture of degree；The second temperature is lower than first temperature；
Crops mud mixture by the temperature in second temperature carries out Anaerobic Digestion.
In one embodiment, the high-temperature-hot-water solution sludge and the waste agronomic crop are mixed by predetermined weight ratio
Close, obtain temperature the crops mud mixture of second temperature the step of the following steps are included:
The waste agronomic crop and water are mixed, obtain temperature in the crops aqueous mixtures of third temperature；
The high-temperature-hot-water solution sludge and the crops aqueous mixtures are mixed, obtain temperature in the farming of second temperature
Object mud mixture；Wherein, the weight ratio of the high-temperature-hot-water solution sludge and the waste agronomic crop is the predetermined weight ratio；
Wherein, the second temperature is lower than first temperature, and is higher than the third temperature.
In one embodiment, the moisture content of the crops mud mixture is 3%-35%.
In one embodiment, the solid content of the crops aqueous mixtures is 2%-15%；The high-temperature-hot-water solution
The solid content of sludge is 15%-25%.
In one embodiment, first temperature is 90 DEG C -120 DEG C.
In one embodiment, the predetermined weight ratio is 1:(100-T2)/5(T2-T3)；
Wherein, T2For the second temperature, T3For the third temperature.
In one embodiment, the T2It is 35 DEG C -53 DEG C；The T3It is 0 DEG C -40 DEG C.
In one embodiment, the high-temperature-hot-water solution sludge and the waste agronomic crop are mixed by predetermined weight ratio
The step of before, it is further comprising the steps of:
The waste agronomic crop is crushed, the broken shape waste agronomic crop having a size of 1-30mm is obtained.
In one embodiment, the crops are stalk.
In one embodiment, generated biogas is returned after the waste agronomic crop being carried out Anaerobic Digestion
It receives, provides thermal energy for assisting to the pyrohydrolysis process of the sludge.
The biogas slurry obtained in above-mentioned waste agronomic crop and Method for comprehensive treatment of sludge through the Anaerobic Digestion and/or natural pond
Slag.
Above-mentioned biogas slurry and/or biogas residue are preparing the application in fertilizer.
The thermal energy of high-temperature-hot-water solution sludge is dexterously applied to useless by above-mentioned waste agronomic crop and Method for comprehensive treatment of sludge
Abandon in the processing of crops, on the one hand can need additional heating to avoid waste agronomic crop and caused by energy consumption；On the other hand
Can be needed to avoid high-temperature-hot-water solution sludge it is additional cooling equipment is set to cool down, caused by the wasting of resources, it is energy saving,
Processing cost is greatly lowered.
In addition, without being easier to reality while being additionally provided thermal energy in above-mentioned waste agronomic crop and Method for comprehensive treatment of sludge
Now the temperature of Anaerobic Digestion is controlled, and then guarantees treatment effeciency, and the biogas that processing obtains may be used as marsh gas power generation
It Deng investment industrial production, can also assist providing thermal energy to the pyrohydrolysis process of sludge using thermal energy entrained by biogas, realize
Heat recovery；And the biogas residue that processing obtains can make solid organic fertilizer, composite microbe fertilizer etc., biogas slurry can carry out liquid manure
Integration utilizes, or for producing the Liquid organic fertilizers such as liquid fertilizer, realizes veritably resource circulation utilization, environmentally protective.
Detailed description of the invention
Fig. 1 is the waste agronomic crop process flow diagram of an embodiment of the present invention.
Specific embodiment
To facilitate the understanding of the present invention, below will to invention is more fully described, and give it is of the invention compared with
Good embodiment.But the invention can be realized in many different forms, however it is not limited to embodiment described herein.Phase
Instead, purpose of providing these embodiments is makes the disclosure of the present invention more thorough and comprehensive.
Unless otherwise defined, all technical and scientific terms used herein and belong to technical field of the invention
The normally understood meaning of technical staff is identical.Term as used herein in the specification of the present invention is intended merely to description tool
The purpose of the embodiment of body, it is not intended that in the limitation present invention.Term as used herein "and/or" includes one or more phases
Any and all combinations of the listed item of pass.
The processing method of the waste agronomic crop of an embodiment of the present invention, comprising the following steps: by sludge in the first temperature
Pyrohydrolysis is carried out, high-temperature-hot-water solution sludge is obtained；Waste agronomic crop is subjected to Anaerobic Digestion, wherein waste agronomic crop into
The thermal energy of row Anaerobic Digestion comes from thermal energy possessed by high-temperature-hot-water solution sludge.
Intelligible, waste agronomic crop of the invention refers to that crops play remaining part after its script use value,
Such as the stalks crops such as straw, wheat straw, corn stalk, sorghum and rape, rape straw, fallen leaves, apoptosis rhizome etc..In an embodiment
In, waste agronomic crop is stalk.
Sludge of the invention can for this field routinely understand, the sludge of generations such as including domestic refuse, to its into
It needs first to carry out pyrohydrolysis during row processing, so that the microorganism wadding body in sludge disintegrates, microbial cell breakage, cell
In content release go forward side by side an one-step hydrolysis, be conducive to the process of subsequent anaerobic digestion.It is intelligible, it can be normal using this field
It advises pyrohydrolysis method and apparatus and carries out sludge pyrohydrolysis.
" high temperature " should be done it is generally understood that higher than room temperature, the temperature of room temperature in high-temperature-hot-water solution sludge of the invention, that is, be higher than
Sludge be not hydrolyzed before temperature.The temperature of pyrohydrolysis is higher, usually at 60 DEG C or more, therefore gained after sludge pyrohydrolysis
The high-temperature-hot-water solution sludge temperature arrived is higher.At such a temperature, digestion process directly can not be carried out to sludge, needs additionally to be arranged
Cooling device cools down it, results in waste of resources.
Anaerobic Digestion of the invention is the common meaning of this field, i.e., using anaerobe in waste agronomic crop
Organic matter is decomposed, and the process of biogas etc. is generated.Microorganism, reagent used by Anaerobic Digestion, instrument and equipment etc. can
The common selection for thinking this field, is not specially limited herein.
Intelligible, the thermal energy that waste agronomic crop carries out Anaerobic Digestion is had from the cooling of high-temperature-hot-water solution sludge
Thermal energy, i.e. thermal energy entrained by high-temperature-hot-water solution sludge applies it in the heating of waste agronomic crop, detests in favor of reaching
The target temperature of oxygen digestion process.Such as: heat-exchange apparatus is utilized, the had thermal energy of high-temperature-hot-water solution sludge is transmitted to discarded
Crops heat it, reach the target temperature of waste agronomic crop Anaerobic Digestion；It can also be dirty by high-temperature-hot-water solution
Mud and waste agronomic crop mixing, using heat transfer effect, reach the target temperature of Anaerobic Digestion.It is intelligible, discard farming
The temperature of object is possessed temperature under its usual state, can be had differences according to processing weather, environment etc., as long as can utilize
High-temperature-hot-water solution sludge reaches the target temperature of Anaerobic Digestion, it is thus understood that all within the scope of the present invention.
The present inventor has found in the course of the study, sludge and waste agronomic crop organic matter rich in, and equal energy
It is degraded, therefore the two can be combined using the method for Anaerobic Digestion, made full use of the thermal energy differential of the two, accomplish
The reasonable utilization of the energy.And it can be acted on using the transmitting of thermal energy using the method for directly mixing the two, pass through both control
Weight ratio etc., control mixture is in the suitable temperature of anaerobic digestion, improves the efficiency of anaerobic digestion.And inventor also sends out
Existing, in sludge and waste agronomic crop in addition to labile organic compound rich in, the two inorganic salts substance classes are not identical, mixing
After can play synergistic effect, promote the progress of anaerobic digestion, further enhance anaerobic digestion efficiency.In addition, usual crops
Lack nitrogen and other microelements in waste, and usual carbon hydrogen element content is relatively low in sludge, and the two is mixed
After can mutually make up, the biogas slurry and biogas residue constituent content made is richer, have higher nutritive value, particularly suitable for
As preparing fertilizer.
It is preferred that as shown in Figure 1, above-mentioned waste agronomic crop processing method the following steps are included:
S101: waste agronomic crop is pre-processed.
It should be noted that step S101 can be omitted, waste agronomic crop directly can be put into lower step and used, herein not
It is particularly limited to.
When used waste agronomic crop is stalk relatively large substance in equal volume, first it can be crushed,
To increase the surface area of waste agronomic crop, the reaction efficiency of subsequent anaerobic digestion reaction is improved.In one embodiment, step S101
In obtain the broken shape waste agronomic crop having a size of 1-30mm.
S102: waste agronomic crop and water are mixed, obtain temperature in the crops aqueous mixtures of third temperature.
It should be noted that step S102 can be omitted, waste agronomic crop directly can be put into lower step and used, herein not
It is particularly limited to.By the way that by a small amount of water and waste agronomic crop mixing, the crops aqueous mixtures with certain solid content first are made,
Be conducive to mix in subsequent step with pyrohydrolysis sludge, adjust the temperature of obtained mixture.In one embodiment, crops
The solid content of aqueous mixtures is 0-45%.In one embodiment, the solid content of crops aqueous mixtures is 2%-40%.It is real one
It applies in example, the solid content of crops aqueous mixtures is 5%-10%.
In addition, third temperature is not particularly limited, according to temperature of environment, the water of addition etc., there is some difference.It is real one
It applies in example, third temperature is 0 DEG C -40 DEG C.
S103: sludge is subjected to pyrohydrolysis in the first temperature, obtains high-temperature-hot-water solution sludge.
In one embodiment, the first temperature is 30 DEG C -140 DEG C, preferably 90 DEG C -120 DEG C.In one embodiment, Gao Wenre
The solid content of hydrolyzing sludge is more than or equal to 5%.In another embodiment, the solid content of high-temperature-hot-water solution sludge is 5%-
30%, preferably 3%-25%.
It is intelligible, water can be properly added, the temperature and solid content of high-temperature-hot-water solution sludge are adjusted.
S104: high-temperature-hot-water solution sludge and crops aqueous mixtures are mixed, obtain temperature in the crops of second temperature
Mud mixture；Wherein, the weight ratio of high-temperature-hot-water solution sludge and waste agronomic crop is predetermined weight ratio.
In step S104, the second temperature (T of Anaerobic Digestion2) can according to process object and microbe species etc. into
Row is adjusted.In one embodiment, T2It is 35 DEG C -53 DEG C.The control of digestion process temperature is usually with higher in the range
Reaction efficiency.
In addition, the water content of crops mud mixture can be adjusted according to the actual situation.In one embodiment, agriculture
The moisture content of crop mud mixture is 3%-35%, to improve anaerobic digestion reaction efficiency.It should be noted that can pass through
Add water to adjust the water content of mixture and temperature, is not specially limited herein.
The predetermined weight ratio of step S104 can be according to second temperature (the i.e. digestion reaction temperature of crops mud mixture
Degree) it is adjusted.In one embodiment, the predetermined weight ratio of pyrohydrolysis sludge and waste agronomic crop is 1:(T1-T2)/5(T2-
T3), wherein T1First temperature, T2Second temperature, T3For third temperature, in one embodiment, the first temperature is 90 DEG C -120 DEG C,
The predetermined weight ratio of pyrohydrolysis sludge and waste agronomic crop is 1:(100-T2)/5(T2-T3).Such as: when the temperature of pyrohydrolysis sludge
Degree is 90 DEG C -120 DEG C, and the solid content of crops aqueous mixtures is 2%-40%, and the solid content of high-temperature-hot-water solution sludge is 3%-
25%, T2It is 33 DEG C, T3It is 10 DEG C, the predetermined weight ratio of pyrohydrolysis sludge and waste agronomic crop is 1:0.443.By by hot water
The predetermined weight ratio for solving sludge and waste agronomic crop controls within the scope of above-mentioned formula, can guarantee anaerobic digestion reaction efficiently into
While row, thermal energy is fully utilized, and improves treatment effeciency, reduces processing cost, further increases economic value.
It is intelligible, it can also include the process of homogeneous samming after being mixed in step S104, that is, improve obtained mixing
The homogeneity of object is conducive to the progress of subsequent anaerobic digestion.
S105: the crops mud mixture by temperature in second temperature carries out Anaerobic Digestion.
Anaerobic Digestion can be carried out after crops mud mixture is adjusted to required temperature.Detesting in step S105
The instrument and equipment of oxygen digestion process can use this field routine instrument device, and details are not described herein.
The biogas obtained after anaerobic digestion may be used as the investment industrial production such as marsh gas power generation, can also be taken using biogas
The thermal energy of band assists providing thermal energy to sludge pyrohydrolysis process, realizes that heat recovery, such as biogas supply steam boiler produce
Then raw steam supplies sludge pyrohydrolysis and uses；And processing obtains solidliquid mixture and can be separated by solid-liquid separation, obtain biogas slurry and
Biogas residue, wherein biogas residue can make solid organic fertilizer, composite microbe fertilizer etc., and biogas slurry can carry out water-fertilizer integral utilization, or use
In Liquid organic fertilizers such as production liquid fertilizers, veritably resource circulation utilization is realized, it is environmentally protective.
Thermal energy possessed by high-temperature-hot-water solution sludge is dexterously applied to discarded agriculture by above-mentioned waste agronomic crop processing method
In the processing of crop, on the one hand can need additional heating to avoid waste agronomic crop and caused by energy consumption；It on the other hand can also be with
Avoid high-temperature-hot-water solution sludge need it is additional be arranged cooling equipment carry out it is cold and hot, and caused by the wasting of resources, it is energy saving.Specifically
Ground, the following table 1 are individually to carry out stalk processing, individually carry out Treatment of Sludge and stalk and the energy in charts and graphs of sludge collaboration processing:
Table 1
As it can be seen from table 1 compared to individually waste agronomic crop and sludge are handled and can be greatly lowered
Energy consumption has higher economic value and more excellent environmental benefit.
The biogas slurry handled the present invention also provides above-mentioned waste agronomic crop and Method for comprehensive treatment of sludge and or natural pond
Slag.
The present invention also provides above-mentioned biogas slurries and/or biogas residue to prepare the application in fertilizer.
The biogas slurry and biogas residue that the above method is prepared are richer compared to independent processing element content, have higher battalion
Value is supported, is particularly suitable for use as preparing fertilizer.And since the above method further improves the efficiency of anaerobic digestion, so that useless
The organic matter decomposition abandoned in crops and sludge is more thorough, is easier to be absorbed by crops etc., be prepared into compared to conventional method
The biogas slurry and/or biogas residue arrived is worth with higher fertilizer application.
Each technical characteristic of embodiment described above can be combined arbitrarily, for simplicity of description, not to above-mentioned reality
It applies all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, all should be considered as described in this specification.
The embodiments described above only express several embodiments of the present invention, and the description thereof is more specific and detailed, but simultaneously
It cannot therefore be construed as limiting the scope of the patent.It should be pointed out that coming for those of ordinary skill in the art
It says, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to protection of the invention
Range.Therefore, the scope of protection of the patent of the invention shall be subject to the appended claims.
Claims (10)
1. a kind of waste agronomic crop and Method for comprehensive treatment of sludge, which comprises the following steps:
Sludge is subjected to pyrohydrolysis in the first temperature, obtains high-temperature-hot-water solution sludge；
The waste agronomic crop is subjected to Anaerobic Digestion, wherein the waste agronomic crop carries out the Anaerobic Digestion
Thermal energy thermal energy possessed by the high-temperature-hot-water solution sludge.
2. waste agronomic crop according to claim 1 and Method for comprehensive treatment of sludge, which is characterized in that by the discarded agriculture
Crop carry out Anaerobic Digestion the step of the following steps are included:
The high-temperature-hot-water solution sludge and the waste agronomic crop are mixed by predetermined weight ratio, obtain temperature in second temperature
Crops mud mixture；The second temperature is lower than first temperature；
Crops mud mixture by the temperature in second temperature carries out Anaerobic Digestion.
3. waste agronomic crop according to claim 2 and Method for comprehensive treatment of sludge, which is characterized in that by the high warm
Hydrolyzing sludge and the waste agronomic crop are mixed by predetermined weight ratio, obtain temperature in the crops mud mixture of second temperature
The step of the following steps are included:
The waste agronomic crop and water are mixed, obtain temperature in the crops aqueous mixtures of third temperature；
The high-temperature-hot-water solution sludge and the crops aqueous mixtures are mixed, it is dirty in the crops of second temperature to obtain temperature
Mud mixture；Wherein, the weight ratio of the high-temperature-hot-water solution sludge and the waste agronomic crop is the predetermined weight ratio；
Wherein, the second temperature is lower than first temperature, and is higher than the third temperature.
4. waste agronomic crop according to claim 3 and Method for comprehensive treatment of sludge, which is characterized in that the crops are dirty
The moisture content of mud mixture is 8%-35%.
5. waste agronomic crop according to claim 3 and Method for comprehensive treatment of sludge, which is characterized in that the crops water
The solid content of mixture is 2%-40%；The solid content of the high-temperature-hot-water solution sludge is 8%-25%.
6. waste agronomic crop according to claim 5 and Method for comprehensive treatment of sludge, which is characterized in that first temperature
It is 90 DEG C -120 DEG C.
7. waste agronomic crop according to claim 6 and Method for comprehensive treatment of sludge, which is characterized in that the high-temperature-hot-water
The predetermined weight ratio for solving sludge and the waste agronomic crop is 1:(100-T2)/5(T2-T3)；
Wherein, T2For the second temperature, T3For the third temperature.
8. waste agronomic crop according to claim 7 and Method for comprehensive treatment of sludge, which is characterized in that the T2For 35 DEG C-
58℃；The T3It is 0 DEG C -40 DEG C.
9. waste agronomic crop according to claim 1-8 and Method for comprehensive treatment of sludge, which is characterized in that by institute
It states generated biogas after waste agronomic crop carries out Anaerobic Digestion to be recycled, for assisting the pyrohydrolysis to the sludge
Process provides thermal energy.
10. in the described in any item waste agronomic crops of claim 1-9 and Method for comprehensive treatment of sludge through the anaerobic digestion at
It manages obtained biogas slurry and/or biogas residue is preparing the application in fertilizer.
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Application publication date: 20190820 |