CN113415962A - Rapid hydrothermal cracking treatment method and device for sludge - Google Patents
Rapid hydrothermal cracking treatment method and device for sludge Download PDFInfo
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- CN113415962A CN113415962A CN202110822406.8A CN202110822406A CN113415962A CN 113415962 A CN113415962 A CN 113415962A CN 202110822406 A CN202110822406 A CN 202110822406A CN 113415962 A CN113415962 A CN 113415962A
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- 239000010802 sludge Substances 0.000 title claims abstract description 116
- 238000000034 method Methods 0.000 title claims abstract description 40
- 238000005336 cracking Methods 0.000 title claims abstract description 27
- 238000003756 stirring Methods 0.000 claims abstract description 121
- 239000003814 drug Substances 0.000 claims abstract description 59
- 239000000843 powder Substances 0.000 claims abstract description 53
- 239000010902 straw Substances 0.000 claims abstract description 46
- 229920002521 macromolecule Polymers 0.000 claims abstract description 8
- 239000000203 mixture Substances 0.000 claims abstract description 8
- 230000001681 protective effect Effects 0.000 claims description 58
- 230000032683 aging Effects 0.000 claims description 44
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 42
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 28
- 230000018044 dehydration Effects 0.000 claims description 20
- 238000006297 dehydration reaction Methods 0.000 claims description 20
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims description 16
- 238000000354 decomposition reaction Methods 0.000 claims description 15
- 238000007599 discharging Methods 0.000 claims description 15
- PNEYBMLMFCGWSK-UHFFFAOYSA-N Alumina Chemical compound [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 14
- 235000019738 Limestone Nutrition 0.000 claims description 14
- 239000006028 limestone Substances 0.000 claims description 14
- 239000000395 magnesium oxide Substances 0.000 claims description 14
- GNRSAWUEBMWBQH-UHFFFAOYSA-N oxonickel Chemical compound [Ni]=O GNRSAWUEBMWBQH-UHFFFAOYSA-N 0.000 claims description 14
- 235000011121 sodium hydroxide Nutrition 0.000 claims description 14
- 238000004321 preservation Methods 0.000 claims description 13
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 claims description 12
- 230000005540 biological transmission Effects 0.000 claims description 8
- 229920006395 saturated elastomer Polymers 0.000 claims description 8
- 241000209140 Triticum Species 0.000 claims description 7
- 235000021307 Triticum Nutrition 0.000 claims description 7
- 240000008042 Zea mays Species 0.000 claims description 7
- 235000005824 Zea mays ssp. parviglumis Nutrition 0.000 claims description 7
- 235000002017 Zea mays subsp mays Nutrition 0.000 claims description 7
- 235000005822 corn Nutrition 0.000 claims description 7
- 238000010438 heat treatment Methods 0.000 claims description 7
- 238000007789 sealing Methods 0.000 claims description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 7
- 238000000197 pyrolysis Methods 0.000 claims 4
- 239000003795 chemical substances by application Substances 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 9
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 abstract description 5
- 239000000463 material Substances 0.000 abstract description 3
- WQZGKKKJIJFFOK-GASJEMHNSA-N Glucose Natural products OC[C@H]1OC(O)[C@H](O)[C@@H](O)[C@@H]1O WQZGKKKJIJFFOK-GASJEMHNSA-N 0.000 abstract description 2
- 102000015636 Oligopeptides Human genes 0.000 abstract description 2
- 108010038807 Oligopeptides Proteins 0.000 abstract description 2
- 150000001413 amino acids Chemical class 0.000 abstract description 2
- WQZGKKKJIJFFOK-VFUOTHLCSA-N beta-D-glucose Chemical compound OC[C@H]1O[C@@H](O)[C@H](O)[C@@H](O)[C@@H]1O WQZGKKKJIJFFOK-VFUOTHLCSA-N 0.000 abstract description 2
- 239000003054 catalyst Substances 0.000 abstract description 2
- 210000002421 cell wall Anatomy 0.000 abstract description 2
- 235000014113 dietary fatty acids Nutrition 0.000 abstract description 2
- 230000007613 environmental effect Effects 0.000 abstract description 2
- 239000000194 fatty acid Substances 0.000 abstract description 2
- 229930195729 fatty acid Natural products 0.000 abstract description 2
- 150000004665 fatty acids Chemical class 0.000 abstract description 2
- 239000008103 glucose Substances 0.000 abstract description 2
- 235000001014 amino acid Nutrition 0.000 abstract 1
- 239000003344 environmental pollutant Substances 0.000 abstract 1
- 235000001727 glucose Nutrition 0.000 abstract 1
- 235000011187 glycerol Nutrition 0.000 abstract 1
- 239000005416 organic matter Substances 0.000 abstract 1
- 231100000719 pollutant Toxicity 0.000 abstract 1
- 238000000746 purification Methods 0.000 abstract 1
- 238000004227 thermal cracking Methods 0.000 description 8
- 239000000126 substance Substances 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000011038 discontinuous diafiltration by volume reduction Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 150000003384 small molecules Chemical class 0.000 description 1
Images
Classifications
-
- 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
-
- 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
- C02F11/004—Sludge detoxification
-
- 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
-
- 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
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
-
- 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
- C02F11/18—Treatment of sludge; Devices therefor by thermal conditioning
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/06—Sludge reduction, e.g. by lysis
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- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Treatment Of Sludge (AREA)
Abstract
The invention belongs to the field of environmental protection, in particular to a method and a device for rapid hydrothermal cracking treatment of sludge, which aims at the problems of long time consumption and poor effect of the existing method and provides the following scheme, and the method comprises the following steps: leading-in agitated vessel with the mud of moisture content above 80%, the straw powder that accounts for mud 20% -25% is added to the inside of equipment, then start agitating unit and stir mud and straw powder and mix, and inject a certain amount of steam, the inside mud of agitated vessel intensifies and steps up, the churning time is 10 minutes ~ 15 minutes, carry out the release finally, utilize the straw powder as the auxiliary material, utilize medicament and No. two medicaments as the catalyst, can let the cell wall break, macromolecule organic matter decomposes into the micromolecule, the material in the mud decomposes into the oligopeptide, amino acid, fatty acid, glycerine and glucose etc. can effectual purification mud, promote the treatment effect, decompose and reduce the pollutant, make things convenient for the subsequent use of mud.
Description
Technical Field
The invention relates to the technical field of environmental protection, in particular to a rapid hydrothermal cracking treatment method and a rapid hydrothermal cracking treatment device for sludge.
Background
The sludge treatment has become one of the key points of research of various large sewage treatment plants, and the treatment methods are different, for example, the patent with the application number of CN201010118759.1 discloses a sludge thermal cracking treatment method, which has the advantages of high efficiency, low energy consumption, oxygen-free low-temperature cracking, high heat value of the recovered sludge, and the effects of maximum volume reduction and resource utilization of the sludge.
However, the thermal cracking treatment method for sludge has some problems, such as that thermal cracking is performed only by temperature and pressure, a large amount of time is needed to wait for completion of thermal cracking in the actual treatment process, the thermal cracking speed is slow, the thermal cracking effect is poor, thermal cracking cannot be completed completely, the content of harmful substances in sludge is high, and the environment is still easily polluted.
Disclosure of Invention
Based on the problems of long time consumption and poor effect in the background technology, the invention provides a rapid hydrothermal cracking treatment method and a rapid hydrothermal cracking treatment device for sludge.
The invention provides a rapid hydrothermal cracking treatment method for sludge, which comprises the following steps:
s1: introducing sludge with the water content of more than 80% into stirring equipment, adding straw powder accounting for 20% -25% of the sludge into the equipment, starting a stirring device to stir and mix the sludge and the straw powder, injecting a certain amount of steam, raising the temperature and the pressure of the sludge in the stirring equipment, stirring for 10-15 minutes, and finally releasing the pressure;
s2: then, sequentially adding a first medicament which accounts for 5-20% of the sludge and a second medicament which accounts for 2-5% of the sludge into the stirring equipment, wherein the first medicament comprises activated carbon, nano aluminum oxide, caustic soda and magnesium oxide, the second medicament comprises limestone powder and nickelous oxide powder, the stirring equipment continuously stirs in the adding process, a certain amount of saturated steam is injected after the addition of the medicaments is finished, the temperature and the pressure in the stirring equipment are raised, organic matters of the sludge and straws start to hydrolyze under the action of the medicaments, macromolecules are hydrolyzed into micromolecules, and the decomposition reaction lasts for 1-1.5 hours;
s3: then, maintaining the pressure for 30-50 minutes, discharging the gas, and discharging the decomposed sludge into a dewatering device;
s4: and (4) after the dehydration is finished, introducing the sludge into an aging container, sealing the aging container, and then heating, preserving heat and aging to obtain the treated sludge.
Preferably, in S1, the straw powder is one of wheat straw and corn straw.
Preferably, in S1, the pressure of the injected steam is controlled to be 1.3MPa to 1.6MPa, and the temperature inside the apparatus is 110 ℃ to 150 ℃.
Preferably, in S2, the ratio of the activated carbon, the nano-alumina, the caustic soda and the magnesia in the first medicament is 100: 15: 20: 5.
preferably, in S2, the ratio of the limestone powder to the nickelous oxide powder in the second medicament is 10: 2.
Preferably, in S2, the steam is injected in an amount of 15% to 25% of the sludge, and the pressure is controlled to be 1.2MPa to 1.5 MPa.
Preferably, in S2, the decomposition temperature inside the apparatus is controlled to 150 to 190 ℃.
Preferably, in S4, the temperature for heat preservation and aging is controlled to be 60-80 ℃, and the time for heat preservation and aging is 5-6 hours.
A sludge rapid hydrothermal cracking treatment device comprises a stirring device, a dewatering device communicated with the bottom of the stirring device and an aging container communicated with the right side of the dewatering device, wherein rotating shafts are rotatably sleeved on two sides of the inside of the stirring device, stirring rods are bolted on the surfaces of the rotating shafts, a protective shell is bolted on the front side of the stirring device, the front end of each rotating shaft penetrates through a hole in the rear side of the protective shell and is fixedly sleeved with a driving wheel, the top of each driving wheel is meshed with a power wheel, the axis of each power wheel is rotatably sleeved with the inside of the protective shell, sliding frames are bolted on two sides of the middle end of the inside of the protective shell, a toothed plate is slidably connected to the side of each sliding frame and is meshed with the power wheel, a connecting frame is bolted on the bottom of each toothed plate, a hinged rod is hinged to the bottom of the middle end of the inside of the protective shell, and two ends of the hinged rods are respectively slidably connected with the insides of the two connecting frames, the inside middle-end of protective housing rotates and has cup jointed the fifth wheel, the surface transmission of fifth wheel is connected with the chain, the both ends of chain respectively with the both sides bolt of hinge bar top middle-end, the top bolt of fifth wheel has the connecting rod, the top of connecting rod articulates there is the slide bar, the surperficial sliding connection of slide bar has the sliding sleeve, the top bolt of sliding sleeve has the guide pole, the equal sliding connection in both ends on guide pole surface has the slide cartridge, the rear side of slide cartridge and the inside bolt of protective housing, the inside top bolt of protective housing has the hydraulic stem, the output of hydraulic stem and the top bolt of guide pole.
Preferably, the left side of agitated vessel communicates with a steam pipe, the left side of agitated vessel top communicates with an exhaust pipe, the middle-end of agitated vessel top communicates with a feed pipe, and the right side of agitated vessel top communicates with a pressure reducing valve.
The invention has the beneficial effects that:
1. straw powder is used as an auxiliary material, a first medicament and a second medicament are used as catalysts, so that cell wall breaking can be realized, macromolecular organic matters are decomposed into small molecules, substances in sludge are decomposed into oligopeptides, amino acids, fatty acids, glycerol, glucose and the like, sludge can be effectively purified, the treatment effect is improved, the treatment speed is accelerated, the content of harmful substances is low, and the subsequent utilization of the sludge is facilitated;
2. the hydraulic rod is utilized to drive the guide rod to move, the guide rod drives the slide rod to move through the sliding sleeve, the slide rod drives the connecting wheel to rotate through the connecting rod, the connecting wheel drives the hinge rod to rotate through the chain, the hinge rod drives the toothed plates on two sides to move reversely through the connecting frame, the two toothed plates drive the two driving wheels to rotate through the power wheel, the driving wheels drive the two groups of stirring rods to rotate through the rotating shaft, the two groups of stirring rods are utilized to stir the sludge, and the stirring effect is improved;
the invention has the advantages of good treatment effect and high speed, the treated sludge is clean and pollution-free, can be used for municipal greening, returning to fields and the like, and has very high economic value.
Drawings
FIG. 1 is a flow chart of the present invention;
FIG. 2 is a schematic front view of the structure of the present invention;
fig. 3 is a schematic view of an internal structure of the protective case according to the present invention.
In the figure: stirring equipment 1, dewatering equipment 2, an aging container 3, a rotating shaft 4, a stirring rod 5, a protective shell 6, a transmission wheel 7, a power wheel 8, a sliding frame 9, a toothed plate 10, a connecting frame 11, a hinged rod 12, a connecting wheel 13, a chain 14, a connecting rod 15, a sliding rod 16, a sliding sleeve 17, a guide rod 18, a sliding cylinder 19, a hydraulic rod 20, a steam pipe 21, an exhaust pipe 22, a feeding pipe 23 and a pressure reducing valve 24.
Detailed Description
The present invention will be further illustrated with reference to the following specific examples.
Referring to FIGS. 1-3, embodiment one
The embodiment provides a rapid hydrothermal cracking treatment method for sludge, which comprises the following steps:
s1: introducing sludge with the water content of more than 80% into stirring equipment, adding straw powder accounting for 20% of the sludge into the equipment, finally relieving pressure, wherein the straw powder is one of wheat straw and corn straw, starting a stirring device to stir and mix the sludge and the straw powder, injecting a certain amount of steam, controlling the pressure of the injected steam to be 1.3-1.6 MPa, controlling the temperature inside the equipment to be 110-150 ℃, raising the temperature and boosting the pressure of the sludge inside the stirring equipment, and stirring for 10-15 minutes;
s2: then, adding a first medicament accounting for 5% of sludge and a second medicament accounting for 2% of sludge into the stirring equipment in sequence, wherein the first medicament comprises activated carbon, nano alumina, caustic soda and magnesium oxide, and the ratio of the activated carbon to the nano alumina to the caustic soda to the magnesium oxide in the first medicament is 100: 15: 20: 5, the second medicament comprises limestone powder and nickelous oxide powder, the proportion of the limestone powder to the nickelous oxide powder in the second medicament is 10:2, stirring equipment is continuously stirred in the adding process, a certain amount of saturated steam is injected after the medicament is added, the amount of the injected steam is 15% -25% of that of sludge, the pressure is controlled to be 1.2-1.5 MPa, the temperature and the pressure in the stirring equipment are increased, organic matters start to hydrolyze under the action of the medicament in the sludge and the straws, macromolecules are hydrolyzed into micromolecules, the decomposition reaction lasts for 1-1.5 hours, and the decomposition temperature in the equipment is controlled to be 150-190 ℃;
s3: then, maintaining the pressure for 30-50 minutes, discharging the gas, and discharging the decomposed sludge into a dewatering device;
s4: and (3) after the dehydration is finished, introducing the sludge into an aging container, sealing the aging container, and then heating, preserving heat and aging, wherein the temperature for heat preservation and aging is controlled at 60-80 ℃, and the time for heat preservation and aging is 5-6 hours, so that the treated sludge is obtained.
A rapid hydrothermal cracking treatment device for sludge comprises a stirring device 1, a dehydration device 2 communicated with the bottom of the stirring device 1 and an aging container 3 communicated with the right side of the dehydration device 2, a steam pipe 21 is communicated with the left side of the stirring device 1, an exhaust pipe 22 is communicated with the left side of the top of the stirring device 1, a feed pipe 23 is communicated with the middle end of the top of the stirring device 1, a pressure reducing valve 24 is communicated with the right side of the top of the stirring device 1, a rotating shaft 4 is rotatably sleeved on both sides of the inside of the stirring device 1, a stirring rod 5 is bolted on the surface of the rotating shaft 4, a protective shell 6 is bolted on the front side of the stirring device 1, the front end of the rotating shaft 4 penetrates through a hole on the rear side of the protective shell 6 and is fixedly sleeved with a driving wheel 7, a power wheel 8 is meshed on the top of the driving wheel 7, the axis of the power wheel 8 is rotatably sleeved with the inside of the protective shell 6, and a sliding frame 9 is bolted on both sides of the middle end of the inside of the protective shell 6, the side sliding connection of balladeur train 9 has pinion rack 10, pinion rack 10 meshes with power wheel 8, the bottom bolt of pinion rack 10 has link 11, the bottom of the inside middle-end of protective housing 6 articulates there is hinge rod 12, the both ends of hinge rod 12 respectively with the inside sliding connection of two link 11, the middle-end rotation of the inside of protective housing 6 has cup jointed connecting wheel 13, the surface transmission of connecting wheel 13 is connected with chain 14, the both ends of chain 14 respectively with the both sides bolt of hinge rod 12 top middle-end, the top bolt of connecting wheel 13 has connecting rod 15, the top of connecting rod 15 articulates there is slide bar 16, the sliding surface connection of slide bar 16 has sliding sleeve 17, the top bolt of sliding sleeve 17 has guide bar 18, the equal sliding connection in both ends on guide bar 18 surface has slide tube 19, the rear side of slide tube 19 and the inside bolt of protective housing 6, the inside top bolt of protective housing 6 has hydraulic stem 20, the output of hydraulic stem 20 and the top bolt of guide bar 18.
Referring to FIGS. 1-3, example II
The embodiment provides a rapid hydrothermal cracking treatment method and a device for sludge, and the method comprises the following steps:
s1: introducing sludge with the water content of more than 80% into stirring equipment, adding straw powder which accounts for 21% of the sludge into the equipment, finally relieving pressure, wherein the straw powder is one of wheat straw and corn straw, starting a stirring device to stir and mix the sludge and the straw powder, injecting a certain amount of steam, controlling the pressure of the injected steam to be 1.3-1.6 MPa, controlling the temperature inside the equipment to be 110-150 ℃, raising the temperature and boosting the pressure of the sludge inside the stirring equipment, and stirring for 10-15 minutes;
s2: then, adding a first medicament accounting for 10% of sludge and a second medicament accounting for 3% of sludge into the stirring equipment in sequence, wherein the first medicament comprises activated carbon, nano alumina, caustic soda and magnesium oxide, and the ratio of the activated carbon to the nano alumina to the caustic soda to the magnesium oxide in the first medicament is 100: 15: 20: 5, the second medicament comprises limestone powder and nickelous oxide powder, the proportion of the limestone powder to the nickelous oxide powder in the second medicament is 10:2, stirring equipment is continuously stirred in the adding process, a certain amount of saturated steam is injected after the medicament is added, the amount of the injected steam is 15% -25% of that of sludge, the pressure is controlled to be 1.2-1.5 MPa, the temperature and the pressure in the stirring equipment are increased, organic matters start to hydrolyze under the action of the medicament in the sludge and the straws, macromolecules are hydrolyzed into micromolecules, the decomposition reaction lasts for 1-1.5 hours, and the decomposition temperature in the equipment is controlled to be 150-190 ℃;
s3: then, maintaining the pressure for 30-50 minutes, discharging the gas, and discharging the decomposed sludge into a dewatering device;
s4: and (3) after the dehydration is finished, introducing the sludge into an aging container, sealing the aging container, and then heating, preserving heat and aging, wherein the temperature for heat preservation and aging is controlled at 60-80 ℃, and the time for heat preservation and aging is 5-6 hours, so that the treated sludge is obtained.
A rapid hydrothermal cracking treatment device for sludge comprises a stirring device 1, a dehydration device 2 communicated with the bottom of the stirring device 1 and an aging container 3 communicated with the right side of the dehydration device 2, a steam pipe 21 is communicated with the left side of the stirring device 1, an exhaust pipe 22 is communicated with the left side of the top of the stirring device 1, a feed pipe 23 is communicated with the middle end of the top of the stirring device 1, a pressure reducing valve 24 is communicated with the right side of the top of the stirring device 1, a rotating shaft 4 is rotatably sleeved on both sides of the inside of the stirring device 1, a stirring rod 5 is bolted on the surface of the rotating shaft 4, a protective shell 6 is bolted on the front side of the stirring device 1, the front end of the rotating shaft 4 penetrates through a hole on the rear side of the protective shell 6 and is fixedly sleeved with a driving wheel 7, a power wheel 8 is meshed on the top of the driving wheel 7, the axis of the power wheel 8 is rotatably sleeved with the inside of the protective shell 6, and a sliding frame 9 is bolted on both sides of the middle end of the inside of the protective shell 6, the side sliding connection of balladeur train 9 has pinion rack 10, pinion rack 10 meshes with power wheel 8, the bottom bolt of pinion rack 10 has link 11, the bottom of the inside middle-end of protective housing 6 articulates there is hinge rod 12, the both ends of hinge rod 12 respectively with the inside sliding connection of two link 11, the middle-end rotation of the inside of protective housing 6 has cup jointed connecting wheel 13, the surface transmission of connecting wheel 13 is connected with chain 14, the both ends of chain 14 respectively with the both sides bolt of hinge rod 12 top middle-end, the top bolt of connecting wheel 13 has connecting rod 15, the top of connecting rod 15 articulates there is slide bar 16, the sliding surface connection of slide bar 16 has sliding sleeve 17, the top bolt of sliding sleeve 17 has guide bar 18, the equal sliding connection in both ends on guide bar 18 surface has slide tube 19, the rear side of slide tube 19 and the inside bolt of protective housing 6, the inside top bolt of protective housing 6 has hydraulic stem 20, the output of hydraulic stem 20 and the top bolt of guide bar 18.
Referring to FIGS. 1-3, example III
The embodiment provides a rapid hydrothermal cracking treatment method and a device for sludge, and the method comprises the following steps:
s1: introducing sludge with the water content of more than 80% into stirring equipment, adding straw powder accounting for 23% of the sludge into the equipment, finally relieving pressure, wherein the straw powder is one of wheat straw and corn straw, starting a stirring device to stir and mix the sludge and the straw powder, injecting a certain amount of steam, controlling the pressure of the injected steam to be 1.3-1.6 MPa, controlling the temperature inside the equipment to be 110-150 ℃, raising the temperature and boosting the pressure of the sludge inside the stirring equipment, and stirring for 10-15 minutes;
s2: and then sequentially adding a first medicament accounting for 15% of the sludge and a second medicament accounting for 4% of the sludge into the stirring equipment, wherein the first medicament comprises activated carbon, nano alumina, caustic soda and magnesium oxide, and the ratio of the activated carbon to the nano alumina to the caustic soda to the magnesium oxide in the first medicament is 100: 15: 20: 5, the second medicament comprises limestone powder and nickelous oxide powder, the proportion of the limestone powder to the nickelous oxide powder in the second medicament is 10:2, stirring equipment is continuously stirred in the adding process, a certain amount of saturated steam is injected after the medicament is added, the amount of the injected steam is 15% -25% of that of sludge, the pressure is controlled to be 1.2-1.5 MPa, the temperature and the pressure in the stirring equipment are increased, organic matters start to hydrolyze under the action of the medicament in the sludge and the straws, macromolecules are hydrolyzed into micromolecules, the decomposition reaction lasts for 1-1.5 hours, and the decomposition temperature in the equipment is controlled to be 150-190 ℃;
s3: then, maintaining the pressure for 30-50 minutes, discharging the gas, and discharging the decomposed sludge into a dewatering device;
s4: and (3) after the dehydration is finished, introducing the sludge into an aging container, sealing the aging container, and then heating, preserving heat and aging, wherein the temperature for heat preservation and aging is controlled at 60-80 ℃, and the time for heat preservation and aging is 5-6 hours, so that the treated sludge is obtained.
A rapid hydrothermal cracking treatment device for sludge comprises a stirring device 1, a dehydration device 2 communicated with the bottom of the stirring device 1 and an aging container 3 communicated with the right side of the dehydration device 2, a steam pipe 21 is communicated with the left side of the stirring device 1, an exhaust pipe 22 is communicated with the left side of the top of the stirring device 1, a feed pipe 23 is communicated with the middle end of the top of the stirring device 1, a pressure reducing valve 24 is communicated with the right side of the top of the stirring device 1, a rotating shaft 4 is rotatably sleeved on both sides of the inside of the stirring device 1, a stirring rod 5 is bolted on the surface of the rotating shaft 4, a protective shell 6 is bolted on the front side of the stirring device 1, the front end of the rotating shaft 4 penetrates through a hole on the rear side of the protective shell 6 and is fixedly sleeved with a driving wheel 7, a power wheel 8 is meshed on the top of the driving wheel 7, the axis of the power wheel 8 is rotatably sleeved with the inside of the protective shell 6, and a sliding frame 9 is bolted on both sides of the middle end of the inside of the protective shell 6, the side sliding connection of balladeur train 9 has pinion rack 10, pinion rack 10 meshes with power wheel 8, the bottom bolt of pinion rack 10 has link 11, the bottom of the inside middle-end of protective housing 6 articulates there is hinge rod 12, the both ends of hinge rod 12 respectively with the inside sliding connection of two link 11, the middle-end rotation of the inside of protective housing 6 has cup jointed connecting wheel 13, the surface transmission of connecting wheel 13 is connected with chain 14, the both ends of chain 14 respectively with the both sides bolt of hinge rod 12 top middle-end, the top bolt of connecting wheel 13 has connecting rod 15, the top of connecting rod 15 articulates there is slide bar 16, the sliding surface connection of slide bar 16 has sliding sleeve 17, the top bolt of sliding sleeve 17 has guide bar 18, the equal sliding connection in both ends on guide bar 18 surface has slide tube 19, the rear side of slide tube 19 and the inside bolt of protective housing 6, the inside top bolt of protective housing 6 has hydraulic stem 20, the output of hydraulic stem 20 and the top bolt of guide bar 18.
Referring to FIGS. 1-3, example No. four
The embodiment provides a rapid hydrothermal cracking treatment method and a device for sludge, and the method comprises the following steps:
s1: introducing sludge with the water content of more than 80% into stirring equipment, adding straw powder accounting for 24% of the sludge into the equipment, finally relieving pressure, wherein the straw powder is one of wheat straw and corn straw, starting a stirring device to stir and mix the sludge and the straw powder, injecting a certain amount of steam, controlling the pressure of the injected steam to be 1.3-1.6 MPa, controlling the temperature inside the equipment to be 110-150 ℃, raising the temperature and boosting the pressure of the sludge inside the stirring equipment, and stirring for 10-15 minutes;
s2: and then sequentially adding a first medicament accounting for 18% of the sludge and a second medicament accounting for 4% of the sludge into the stirring equipment, wherein the first medicament comprises activated carbon, nano alumina, caustic soda and magnesium oxide, and the ratio of the activated carbon to the nano alumina to the caustic soda to the magnesium oxide in the first medicament is 100: 15: 20: 5, the second medicament comprises limestone powder and nickelous oxide powder, the proportion of the limestone powder to the nickelous oxide powder in the second medicament is 10:2, stirring equipment is continuously stirred in the adding process, a certain amount of saturated steam is injected after the medicament is added, the amount of the injected steam is 15% -25% of that of sludge, the pressure is controlled to be 1.2-1.5 MPa, the temperature and the pressure in the stirring equipment are increased, organic matters start to hydrolyze under the action of the medicament in the sludge and the straws, macromolecules are hydrolyzed into micromolecules, the decomposition reaction lasts for 1-1.5 hours, and the decomposition temperature in the equipment is controlled to be 150-190 ℃;
s3: then, maintaining the pressure for 30-50 minutes, discharging the gas, and discharging the decomposed sludge into a dewatering device;
s4: and (3) after the dehydration is finished, introducing the sludge into an aging container, sealing the aging container, and then heating, preserving heat and aging, wherein the temperature for heat preservation and aging is controlled at 60-80 ℃, and the time for heat preservation and aging is 5-6 hours, so that the treated sludge is obtained.
A rapid hydrothermal cracking treatment device for sludge comprises a stirring device 1, a dehydration device 2 communicated with the bottom of the stirring device 1 and an aging container 3 communicated with the right side of the dehydration device 2, a steam pipe 21 is communicated with the left side of the stirring device 1, an exhaust pipe 22 is communicated with the left side of the top of the stirring device 1, a feed pipe 23 is communicated with the middle end of the top of the stirring device 1, a pressure reducing valve 24 is communicated with the right side of the top of the stirring device 1, a rotating shaft 4 is rotatably sleeved on both sides of the inside of the stirring device 1, a stirring rod 5 is bolted on the surface of the rotating shaft 4, a protective shell 6 is bolted on the front side of the stirring device 1, the front end of the rotating shaft 4 penetrates through a hole on the rear side of the protective shell 6 and is fixedly sleeved with a driving wheel 7, a power wheel 8 is meshed on the top of the driving wheel 7, the axis of the power wheel 8 is rotatably sleeved with the inside of the protective shell 6, and a sliding frame 9 is bolted on both sides of the middle end of the inside of the protective shell 6, the side sliding connection of balladeur train 9 has pinion rack 10, pinion rack 10 meshes with power wheel 8, the bottom bolt of pinion rack 10 has link 11, the bottom of the inside middle-end of protective housing 6 articulates there is hinge rod 12, the both ends of hinge rod 12 respectively with the inside sliding connection of two link 11, the middle-end rotation of the inside of protective housing 6 has cup jointed connecting wheel 13, the surface transmission of connecting wheel 13 is connected with chain 14, the both ends of chain 14 respectively with the both sides bolt of hinge rod 12 top middle-end, the top bolt of connecting wheel 13 has connecting rod 15, the top of connecting rod 15 articulates there is slide bar 16, the sliding surface connection of slide bar 16 has sliding sleeve 17, the top bolt of sliding sleeve 17 has guide bar 18, the equal sliding connection in both ends on guide bar 18 surface has slide tube 19, the rear side of slide tube 19 and the inside bolt of protective housing 6, the inside top bolt of protective housing 6 has hydraulic stem 20, the output of hydraulic stem 20 and the top bolt of guide bar 18.
Referring to FIGS. 1-3, example V
The embodiment provides a rapid hydrothermal cracking treatment method and a device for sludge, and the method comprises the following steps:
s1: introducing sludge with the water content of more than 80% into stirring equipment, adding straw powder accounting for 25% of the sludge into the equipment, finally relieving pressure, wherein the straw powder is one of wheat straw and corn straw, starting a stirring device to stir and mix the sludge and the straw powder, injecting a certain amount of steam, controlling the pressure of the injected steam to be 1.3-1.6 MPa, controlling the temperature inside the equipment to be 110-150 ℃, raising the temperature and boosting the pressure of the sludge inside the stirring equipment, and stirring for 10-15 minutes;
s2: and then sequentially adding a first medicament accounting for 20% of the sludge and a second medicament accounting for 5% of the sludge into the stirring equipment, wherein the first medicament comprises activated carbon, nano alumina, caustic soda and magnesium oxide, and the ratio of the activated carbon to the nano alumina to the caustic soda to the magnesium oxide in the first medicament is 100: 15: 20: 5, the second medicament comprises limestone powder and nickelous oxide powder, the proportion of the limestone powder to the nickelous oxide powder in the second medicament is 10:2, stirring equipment is continuously stirred in the adding process, a certain amount of saturated steam is injected after the medicament is added, the amount of the injected steam is 15% -25% of that of sludge, the pressure is controlled to be 1.2-1.5 MPa, the temperature and the pressure in the stirring equipment are increased, organic matters start to hydrolyze under the action of the medicament in the sludge and the straws, macromolecules are hydrolyzed into micromolecules, the decomposition reaction lasts for 1-1.5 hours, and the decomposition temperature in the equipment is controlled to be 150-190 ℃;
s3: then, maintaining the pressure for 30-50 minutes, discharging the gas, and discharging the decomposed sludge into a dewatering device;
s4: and (3) after the dehydration is finished, introducing the sludge into an aging container, sealing the aging container, and then heating, preserving heat and aging, wherein the temperature for heat preservation and aging is controlled at 60-80 ℃, and the time for heat preservation and aging is 5-6 hours, so that the treated sludge is obtained.
A rapid hydrothermal cracking treatment device for sludge comprises a stirring device 1, a dehydration device 2 communicated with the bottom of the stirring device 1 and an aging container 3 communicated with the right side of the dehydration device 2, a steam pipe 21 is communicated with the left side of the stirring device 1, an exhaust pipe 22 is communicated with the left side of the top of the stirring device 1, a feed pipe 23 is communicated with the middle end of the top of the stirring device 1, a pressure reducing valve 24 is communicated with the right side of the top of the stirring device 1, a rotating shaft 4 is rotatably sleeved on both sides of the inside of the stirring device 1, a stirring rod 5 is bolted on the surface of the rotating shaft 4, a protective shell 6 is bolted on the front side of the stirring device 1, the front end of the rotating shaft 4 penetrates through a hole on the rear side of the protective shell 6 and is fixedly sleeved with a driving wheel 7, a power wheel 8 is meshed on the top of the driving wheel 7, the axis of the power wheel 8 is rotatably sleeved with the inside of the protective shell 6, and a sliding frame 9 is bolted on both sides of the middle end of the inside of the protective shell 6, the side sliding connection of balladeur train 9 has pinion rack 10, pinion rack 10 meshes with power wheel 8, the bottom bolt of pinion rack 10 has link 11, the bottom of the inside middle-end of protective housing 6 articulates there is hinge rod 12, the both ends of hinge rod 12 respectively with the inside sliding connection of two link 11, the middle-end rotation of the inside of protective housing 6 has cup jointed connecting wheel 13, the surface transmission of connecting wheel 13 is connected with chain 14, the both ends of chain 14 respectively with the both sides bolt of hinge rod 12 top middle-end, the top bolt of connecting wheel 13 has connecting rod 15, the top of connecting rod 15 articulates there is slide bar 16, the sliding surface connection of slide bar 16 has sliding sleeve 17, the top bolt of sliding sleeve 17 has guide bar 18, the equal sliding connection in both ends on guide bar 18 surface has slide tube 19, the rear side of slide tube 19 and the inside bolt of protective housing 6, the inside top bolt of protective housing 6 has hydraulic stem 20, the output of hydraulic stem 20 and the top bolt of guide bar 18.
The working principle is as follows: the hydraulic rod 20 is connected with the power control equipment, the hydraulic rod 20 drives the guide rod 18 to move leftwards, the guide rod 18 slides and limits in the sliding cylinder 19, the guide rod 18 drives the sliding sleeve 17 to move leftwards, the sliding sleeve 17 drives the sliding rod 16 to move leftwards, the sliding rod 16 drives the connecting rod 15 to rotate leftwards, the connecting rod 15 drives the connecting wheel 13 to rotate anticlockwise, the connecting wheel 13 drives the hinged rod 12 to rotate anticlockwise through the chain 14, at the moment, the left end of the hinged rod 12 moves downwards and the right end moves upwards, the left end of the hinged rod 12 drives the left connecting frame 11 to move downwards, the left connecting frame 11 drives the left toothed plate 10 to slide downwards on the side surface of the sliding frame 9, the left power wheel 8 drives the left driving wheel 8 to rotate clockwise, the left driving wheel 7 drives the left driving wheel 7 to rotate anticlockwise through the rotating shaft 4, the right end of the hinged rod 12 drives the right connecting frame 11 to move upwards, the connecting frame 11 on the right side drives the toothed plate 10 on the right side to slide and move upwards on the side face of the sliding frame 9, the toothed plate 10 on the right side drives the power wheel 8 on the right side to rotate clockwise, the power wheel 8 on the right side drives the driving wheel 7 on the right side to rotate anticlockwise, the driving wheel 7 on the right side drives the stirring rod 5 to rotate anticlockwise through the rotating shaft 4, when the hydraulic rod 20 moves rightwards, conduction is realized according to the steps, the steam pipe 21 is used for injecting saturated steam, the exhaust pipe 22 is used for discharging decomposed gas, the feed pipe 23 is used for feeding, the pressure reducing valve 24 is used for reducing the air pressure inside the stirring equipment 1, the dehydration equipment 2 is conventional dehydration equipment and is used for dehydration, and the aging container 3 is a conventional aging container.
Comparing the conventional fast hydrothermal cracking treatment method for sludge with the fast hydrothermal cracking treatment methods for sludge of examples one to five, the fast hydrothermal cracking treatment methods for sludge of examples one to five are as follows:
from the above table, the treatment speed, completion degree and thermal cracking effect of the rapid hydrothermal cracking treatment method for sludge provided by the invention are obviously improved, the content of harmful substances is greatly reduced, and the third embodiment is the best embodiment.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (10)
1. A rapid hydrothermal cracking treatment method for sludge is characterized by comprising the following steps:
s1: introducing sludge with the water content of more than 80% into stirring equipment, adding straw powder accounting for 20% -25% of the sludge into the equipment, starting a stirring device to stir and mix the sludge and the straw powder, injecting a certain amount of steam, raising the temperature and the pressure of the sludge in the stirring equipment, stirring for 10-15 minutes, and finally releasing the pressure;
s2: then, sequentially adding a first medicament which accounts for 5-20% of the sludge and a second medicament which accounts for 2-5% of the sludge into the stirring equipment, wherein the first medicament comprises activated carbon, nano aluminum oxide, caustic soda and magnesium oxide, the second medicament comprises limestone powder and nickelous oxide powder, the stirring equipment continuously stirs in the adding process, a certain amount of saturated steam is injected after the addition of the medicaments is finished, the temperature and the pressure in the stirring equipment are raised, organic matters of the sludge and straws start to hydrolyze under the action of the medicaments, macromolecules are hydrolyzed into micromolecules, and the decomposition reaction lasts for 1-1.5 hours;
s3: then, maintaining the pressure for 30-50 minutes, discharging the gas, and discharging the decomposed sludge into a dewatering device;
s4: and (4) after the dehydration is finished, introducing the sludge into an aging container, sealing the aging container, and then heating, preserving heat and aging to obtain the treated sludge.
2. The rapid hydrothermal sludge pyrolysis treatment method as claimed in claim 1, wherein in S1, the straw powder is one of wheat straw and corn straw.
3. The fast hydrothermal sludge pyrolysis treatment method as claimed in claim 1, wherein in S1, the pressure of injected steam is controlled to be 1.3MPa-1.6MPa, and the temperature inside the device is 110 ℃ to 150 ℃.
4. The rapid hydrothermal cracking treatment method for sludge according to claim 1, wherein in S2, the ratio of activated carbon, nano alumina, caustic soda and magnesia in the first medicament is 100: 15: 20: 5.
5. the method according to claim 1, wherein in S2, the ratio of limestone powder to nickelous oxide powder in the agent II is 10: 2.
6. The rapid hydrothermal decomposition treatment method for sludge according to claim 1, wherein in S2, the amount of steam injected is 15% -25% of the sludge, and the pressure is controlled to be 1.2 MPa-1.5 MPa.
7. The method according to claim 1, wherein the decomposition temperature in the apparatus is controlled to 150 ℃ to 190 ℃ in S2.
8. The fast hydrothermal sludge pyrolysis treatment method as claimed in claim 1, wherein in S4, the temperature for heat preservation and aging is controlled at 60-80 ℃ for 5-6 hours.
9. The utility model provides a quick hydrothermal cracking processing apparatus of mud, includes dewatering equipment (2) and the ageing container (3) of dewatering equipment (2) right side intercommunication of agitated vessel (1), agitated vessel (1) bottom intercommunication, its characterized in that, the inside both sides of agitated vessel (1) are all rotated and are cup jointed pivot (4), the surperficial bolt joint of pivot (4) has puddler (5), the front side bolt joint of agitated vessel (1) has protective housing (6), the front end of pivot (4) runs through the hole of protective housing (6) rear side and the fixed drive wheel (7) that has cup jointed, the top meshing of drive wheel (7) has power wheel (8), the axle center department of power wheel (8) is cup jointed with the inside rotation of protective housing (6), the both sides of the inside middle-end of protective housing (6) all have been bolted carriage (9), the side sliding connection of carriage (9) has pinion rack (10), the toothed plate (10) is meshed with the power wheel (8), the connecting frames (11) are bolted at the bottom of the toothed plate (10), the hinged rod (12) is hinged at the bottom of the middle end inside the protective shell (6), the two ends of the hinged rod (12) are respectively in sliding connection with the inside of the two connecting frames (11), the connecting wheel (13) is rotatably sleeved at the middle end inside the protective shell (6), the surface of the connecting wheel (13) is in transmission connection with the chain (14), the two ends of the chain (14) are respectively in bolting connection with the two sides of the middle end at the top of the hinged rod (12), the connecting rod (15) is bolted at the top of the connecting wheel (13), the sliding rod (16) is hinged at the top end of the connecting rod (15), the sliding sleeve (17) is in sliding connection with the surface of the sliding rod (16), the guide rod (18) is bolted at the top of the sliding sleeve (17), the sliding sleeves (19) are in sliding connection with the two ends of the surface of the guide rod (18), the rear side of the sliding cylinder (19) is bolted with the inside of the protective shell (6), the top end of the inside of the protective shell (6) is bolted with a hydraulic rod (20), and the output end of the hydraulic rod (20) is bolted with the top end of the guide rod (18).
10. The rapid hydrothermal sludge pyrolysis treatment device according to claim 9, wherein a steam pipe (21) is communicated with the left side of the stirring device (1), an exhaust pipe (22) is communicated with the left side of the top of the stirring device (1), a feeding pipe (23) is communicated with the middle end of the top of the stirring device (1), and a pressure reducing valve (24) is communicated with the right side of the top of the stirring device (1).
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