CN109970064A - A kind of urban mud anaerobic digestion biogas residue reduction prepares the device of silicon carbide - Google Patents
A kind of urban mud anaerobic digestion biogas residue reduction prepares the device of silicon carbide Download PDFInfo
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- CN109970064A CN109970064A CN201910121295.0A CN201910121295A CN109970064A CN 109970064 A CN109970064 A CN 109970064A CN 201910121295 A CN201910121295 A CN 201910121295A CN 109970064 A CN109970064 A CN 109970064A
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- silicon carbide
- biogas residue
- anaerobic digestion
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B32/00—Carbon; Compounds thereof
- C01B32/40—Carbon monoxide
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B32/00—Carbon; Compounds thereof
- C01B32/90—Carbides
- C01B32/914—Carbides of single elements
- C01B32/956—Silicon carbide
- C01B32/963—Preparation from compounds containing silicon
- C01B32/97—Preparation from SiO or SiO2
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Abstract
The invention discloses the devices that a kind of urban mud anaerobic digestion biogas residue reduction prepares silicon carbide, including vacuum pump, gas collection tank and the vacuum pyrolysis tank being sequentially connected, ultrasonic ball grinder and vacuum carbon reduction reactor tank, ultrasonic generator is installed on the tank skin of ultrasonic ball grinder, having heaters is installed, the bottom of vacuum carbon reduction reactor tank is equipped with silicon carbide discharge port on the tank skin of vacuum carbon reduction reactor tank；Vacuum pump is connected by gas pipeline with the top of vacuum carbon reduction reactor tank, and the tail portion of vacuum pump is equipped with gas collection tank, is also equipped with vacuum meter on gas pipeline.Carbofrax material is prepared using the anaerobic digestion biogas residue of municipal sludge in the present invention, without adding other chemical reagent, realizes the high added value resource utilization of municipal sludge, has significant economic benefit and environmental benefit.
Description
Technical field
The present invention relates to Sewage Sludge Treatment Techniques fields, are related specifically to a kind of urban mud anaerobic digestion biogas residue reduction
Prepare the device of silicon carbide.
Background technique
With the popularization and application of Wastewater Treated by Activated Sludge Process sanitary sewage, excess sludge production is sharply increased, and sludge yield is
Reached 43,000,000 tons/year (in terms of moisture content 80%), excess sludge processing disposition situation is increasingly serious.Therefore, to city dirt
Mud carries out processing disposition and realizes that its high added value resource utilization has become an important scientific problems.Anaerobic sludge digestion
As a kind of sludge disposal technology of great potential, the energy is recycled while reducing amount of sludge, is become at present in the world most
Welcome sludge reduction and resource treatment technique.But organic matter and SiO in mud granule2Particle mixes,
Organic matter can not be contacted effectively with anaerobic digestion bacterium, cause organic matter that cannot be fully utilized methane phase.So anaerobic digestion
Journey can only utilize a part of organic matter in sludge.Biogas slurry is digested by being dehydrated available digestive juice, digestion biogas residue.Digest natural pond
It is not still recycled there are also a large amount of organic matter in slag.
Simultaneously it can be noted that still there are also a large amount of organic matters, SiO for sludge biogas residue after digestion2And heavy metal, if arbitrarily filled out
It is earthed or is used as biological carbon soil, not only waste large amount of biomass energy source, can also heavy metal be made to enter water and soil environment.
Therefore, a large amount of waste sludge digestion biogas residue needs are effectively handled and resource utilization.A kind of sludge digestion natural pond is needed at present
Slag utilizes device, realizes the high added value resource utilization of urban mud anaerobic digestion biogas residue.
The prior art mainly carries out biogas residue, the solid-liquid separation treatment of biogas slurry to sludge-digestion liquid, then carries out from biogas slurry
Recovery of nitrogen and phosphorus, the processing for less focusing on digestion biogas residue utilize.A kind of entitled method of anaerobic sludge digestion biogas residue brickmaking of patent
(CN107056238A) in then postdigestive sludge biogas residue desiccation will be squeezed into adobe, and is fired into finished bricks after dry；But
Be finished bricks added value it is lower, the ingredients such as heavy metal remain in finished bricks, cause potential hazard.The entitled one kind of patent is detested
Only the biogas residue after deep dehydration is passed through in biogas residue deep dehydration and the method for desiccation (CN108439743A) after oxygen digestion
Screw conveyor enters solar energy desiccation factory, its moisture content is made to be down to 40% after solar energy desiccation；Also no pair of the patent
Sludge digestion biogas residue is efficiently utilized.
Therefore, a large amount of sludge digestion biogas residue how is efficiently used, realizes its high added value resource utilization, is current urgency
Major issue to be solved.
Summary of the invention
It is an object of the invention to aiming at the shortcomings in the prior art, provide a kind of urban mud anaerobic digestion biogas residue reduction
The device of silicon carbide is prepared, to solve the above problems.
Technical problem solved by the invention can be realized using following technical scheme:
A kind of urban mud anaerobic digestion biogas residue reduction prepare the device of silicon carbide, including vacuum pump, gas collection tank with
And vacuum pyrolysis tank, ultrasonic ball grinder and the vacuum carbon reduction reactor tank being sequentially connected, it is equipped on the tank skin of ultrasonic ball grinder
Ultrasonic generator, having heaters is installed on the tank skin of vacuum carbon reduction reactor tank, and the bottom of vacuum carbon reduction reactor tank is equipped with carbon
SiClx discharge port；Vacuum pump is connected by gas pipeline with the top of vacuum carbon reduction reactor tank, and the tail portion of vacuum pump is equipped with
Gas collection tank is also equipped with vacuum meter on gas pipeline.
Further, the first ultrasonic generator and the second ultrasound hair are respectively equipped on the side wall of the ultrasonic ball grinder two sides
The generation frequency that raw device, the first ultrasonic generator and the second ultrasonic generator generate is not identical.
Further, it is equipped with mill ball in the ultrasonic ball grinder, the material of ultrasonic ball grinder and mill ball is agate.
Further, if the mill ball includes the first mill ball, the second mill ball and the third grinding of dry-mixing setting
Ball, the diameter of the first mill ball, the second mill ball and third mill ball are respectively Φ 6mm, Φ 9mm, Φ 12mm, the first grinding
The mass ratio of ball, the second mill ball and third mill ball is 5:3:2.
Further, the heater is used to the temperature in vacuum carbon reduction reactor tank maintaining 1300 DEG C.
Further, the vacuum pump is used to the pressure in vacuum carbon reduction reactor tank maintaining≤100Pa.
Further, the residue particles after being pyrolyzed in the vacuum carbon reduction reactor tank carry out ultrasound in ultrasonic ball grinder
Carbon simple substance is added before ball milling.
Further, vacuum carbon reduction reaction is protruded into from the top of vacuum carbon reduction reactor tank in one end of the gas pipeline
Pipe plug is installed in tank and on its inserting end.
Compared with prior art, beneficial effects of the present invention are as follows:
(1) present invention is for the low problem of city sewage sludge reclamation utility value, innovatively propose combined vacuum pyrolysis,
Ultrasonic ball milling, vacuum carbon reduction technology realize the high added value resource utilization of excess sludge anaerobic digestion biogas residue.
(2) silicon carbide is prepared using urban mud anaerobic digestion biogas residue in the present apparatus, and production process is without adding other
Chemical reagent has significant economic benefit and environmental benefit, realizes the high added value resource utilization of municipal sludge.
Detailed description of the invention
Fig. 1 is the structural representation for the device that urban mud anaerobic digestion biogas residue reduction of the present invention prepares silicon carbide
Figure.
Fig. 2 is the structural schematic diagram of ultrasonic ball grinder of the present invention.
Fig. 3 is the structural schematic diagram of vacuum carbon reduction reactor tank of the present invention.
Specific embodiment
To be easy to understand the technical means, the creative features, the aims and the efficiencies achieved by the present invention, below with reference to
Specific embodiment, the present invention is further explained.
Referring to FIG. 1 to FIG. 3, a kind of urban mud anaerobic digestion biogas residue reduction of the present invention prepares the dress of silicon carbide
It sets, including vacuum pump 15, gas collection tank 16 and the vacuum pyrolysis tank 1 being sequentially connected, ultrasonic ball grinder 2 and vacuum carbon reduction
Reactor tank 3.Ultrasonic generator is installed on the tank skin of ultrasonic ball grinder 2, is equipped with and adds on the tank skin of vacuum carbon reduction reactor tank 3
Hot device 9.The bottom of vacuum carbon reduction reactor tank 3 is equipped with silicon carbide discharge port 11, the top of vacuum carbon reduction reactor tank 3 be equipped with into
Material mouth 8, ultrasonic ball grinder 2 are connected by the feed inlet 8 of vacuum carbon reduction reactor tank 3 with vacuum carbon reduction reactor tank 3.Vacuum
Pump 15 is connected by gas pipeline 13 with the top of vacuum carbon reduction reactor tank 3, and the tail portion of vacuum pump 15 is equipped with gas collection
Tank 16 is also equipped with vacuum meter 14 on gas pipeline.Vacuum pyrolysis tank 1, ultrasonic ball grinder 2 and vacuum carbon reduction reactor tank 3 it
Between respectively by corresponding connecting tube be connected, corresponding switching control pilot is separately installed in connecting tube and gas pipeline.
It is respectively equipped with the first ultrasonic generator 4 and the second ultrasonic generator 5 on the side wall of ultrasonic 2 two sides of ball grinder, first
The generation frequency that ultrasonic generator 4 and the second ultrasonic generator 5 generate is not identical.
Mill ball 7 is equipped in ultrasonic ball grinder 2, the material of ultrasonic ball grinder 2 and mill ball 7 is agate.
If mill ball 7 includes the first mill ball, the second mill ball and the third mill ball of dry-mixing setting, the first grinding
The diameter of ball, the second mill ball and third mill ball is respectively Φ 6mm, Φ 9mm, Φ 12mm.First mill ball, the second mill ball
Mass ratio with third mill ball is 5:3:2.
Heater is used to the temperature in vacuum carbon reduction reactor tank 3 maintaining 1300 DEG C.
Vacuum pump 15 is used to the pressure in vacuum carbon reduction reactor tank 3 maintaining≤100Pa.
Residue particles 6 after being pyrolyzed in vacuum carbon reduction reactor tank 3 need before carrying out ultrasonic ball milling in ultrasonic ball grinder 2
Carbon simple substance is added.It needs to do some analysis means to residue particles before treatment, such as EDS energy spectrum analysis, hand-held XRF instrument
Deng the Si content in residue can be measured.
One end of gas pipeline is protruded into vacuum carbon reduction reactor tank 3 and at it from the top of vacuum carbon reduction reactor tank 3
Pipe plug 12 is installed on inserting end.
Steps are as follows for the present apparatus specifically used: sludge digestion biogas residue being sent into vacuum pyrolysis tank 1 first, by temperature liter
Height avoids moisture to the influence of biological oil product to 100 DEG C of progress vacuum high-temperature dehydrations, then proceedes to be warming up to 500 DEG C of progress
The vacuum pyrolysis process of biogas residue, sludge digestion biogas residue are reacted in vacuum pyrolysis tank 1, and bio oil and residue particles is prepared；
Carbon simple substance is added into the pyrolysis residue particle 6 being collected into adjust Si:C element ratio, control the elements Si in residue: C rubs
Your quantitative proportion is 1:4, then enters back into ultrasonic ball grinder 2 and carries out ultrasonic ball milling processing, makes carbon and SiO2It comes into full contact with；It is super
The supersonic frequency that two ultrasonic generators of 2 two sides of sound ball grinder generate is different, and avoids the mutual weakening of ultrasonic wave；Ball milling
Residue particles 10 carry out vacuum carbon reduction reaction under the conditions of 1300 DEG C, 100Pa afterwards, and silicon carbide, the gas of generation is prepared
The mainly energy gas based on CO, gas are extracted out and be stored in gas collection tank 16 by vacuum pumps 15.
Generally contain a large amount of metal ions in the excess sludge digestion biogas residue in China, is translated into high-temperature vacuum pyrolysis
Metal oxide, with SiO2Reproducibility carbon is competed, the purity of silicon carbide product is reduced.Therefore, biogas residue is removed by vacuum pyrolysis
After organic matter, the metal oxide in pyrolysis residue is removed by addition dust technology or dilute hydrochloric acid solution, improves carbon and SiO2's
Purity.
In high-temperature vacuum CARBON REDUCTION PROCESS OF TANTALUM, according to carbon and SiO2Relative amount it is different, carbon and SiO2Different go back can occur
Former reaction process, such as following formula:
SiO2(s)+C (s, insufficient) → Si (s)+CO2(g)
SiO2(s)+2C (s, excessive) → Si (s)+2CO (g)
Si(s)+C(s)→SiC(s)
Total reaction process such as following formula:
SiO2(s)+3C(s)→SiC(s)+2CO(g)
In high-temperature vacuum CARBON REDUCTION PROCESS OF TANTALUM, according to carbon and SiO2Relative amount it is different, carbon and SiO2Different go back can occur
Former reaction process.It can be seen that SiO2Carbon reduction reaction to need the condition that meets be the atomic molar quantity ratio of Si:C element
≤ 1:3, CO2Reaction between C is also required to the participation of carbon, it is therefore desirable to control the atomic molar quantity ratio of Si:C element
At least 1:4 can meet carbon and SiO in sludge digestion biogas residue2Reaction, and collect obtain SiC material and CO can source gas
Body.
Device that above-mentioned urban mud anaerobic digestion biogas residue reduction prepares silicon carbide or above-mentioned processing method are in municipal sludge
The application of anaerobic digestion biogas residue use aspects also all should be within protection scope of the present invention.
The basic principles, main features and advantages of the present invention have been shown and described above.The technology of the industry
Personnel are it should be appreciated that the present invention is not limited to the above embodiments, and the above embodiments and description only describe this
The principle of invention, without departing from the spirit and scope of the present invention, various changes and improvements may be made to the invention, these changes
Change and improvement all fall within the protetion scope of the claimed invention.The claimed scope of the invention by appended claims and its
Equivalent thereof.
Claims (8)
1. the device that a kind of urban mud anaerobic digestion biogas residue reduction prepares silicon carbide, it is characterised in that: including vacuum pump, gas
Collecting tank and the vacuum pyrolysis tank being sequentially connected, ultrasonic ball grinder and vacuum carbon reduction reactor tank, the tank skin of ultrasonic ball grinder
On ultrasonic generator is installed, having heaters, the bottom of vacuum carbon reduction reactor tank are installed on the tank skin of vacuum carbon reduction reactor tank
Portion is equipped with silicon carbide discharge port；Vacuum pump is connected by gas pipeline with the top of vacuum carbon reduction reactor tank, vacuum pump
Tail portion is equipped with gas collection tank, is also equipped with vacuum meter on gas pipeline.
2. the device that urban mud anaerobic digestion biogas residue reduction according to claim 1 prepares silicon carbide, it is characterised in that:
The first ultrasonic generator and the second ultrasonic generator are respectively equipped on the side wall of the ultrasound ball grinder two sides, the first ultrasound occurs
The generation frequency that device and the second ultrasonic generator generate is not identical.
3. the device that urban mud anaerobic digestion biogas residue reduction according to claim 1 prepares silicon carbide, it is characterised in that:
It is equipped with mill ball in the ultrasound ball grinder, the material of ultrasonic ball grinder and mill ball is agate.
4. the device that urban mud anaerobic digestion biogas residue reduction according to claim 3 prepares silicon carbide, it is characterised in that:
If the mill ball includes the first mill ball, the second mill ball and the third mill ball of dry-mixing setting, the first mill ball, second
The diameter of mill ball and third mill ball is respectively Φ 6mm, Φ 9mm, Φ 12mm, the first mill ball, the second mill ball and third
The mass ratio of mill ball is 5:3:2.
5. the device that urban mud anaerobic digestion biogas residue reduction according to claim 1 prepares silicon carbide, it is characterised in that:
The heater is used to the temperature in vacuum carbon reduction reactor tank maintaining 1300 DEG C.
6. the device that urban mud anaerobic digestion biogas residue reduction according to claim 1 prepares silicon carbide, it is characterised in that:
The vacuum pump is used to the pressure in vacuum carbon reduction reactor tank maintaining≤100Pa.
7. the device that urban mud anaerobic digestion biogas residue reduction according to claim 1 prepares silicon carbide, it is characterised in that:
Carbon simple substance is added before carrying out ultrasonic ball milling in ultrasonic ball grinder in residue particles after being pyrolyzed in the vacuum carbon reduction reactor tank.
8. the device that urban mud anaerobic digestion biogas residue reduction according to claim 1 prepares silicon carbide, it is characterised in that:
One end of the gas pipeline is protruded into from the top of vacuum carbon reduction reactor tank in vacuum carbon reduction reactor tank and in its inserting end
On pipe plug is installed.
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Cited By (2)
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| CN114634278A (en) * | 2022-02-16 | 2022-06-17 | 广东春和景明环保科技有限公司 | Ammonia nitrogen removal process for landfill leachate |
| CN114644428A (en) * | 2022-02-16 | 2022-06-21 | 广东春和景明环保科技有限公司 | Treatment process of leachate of waste incineration power plant |
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