CN110981152A - Multi-stage integrated device and method for drying, catalytic pyrolysis and oxidation of oily sludge - Google Patents
Multi-stage integrated device and method for drying, catalytic pyrolysis and oxidation of oily sludge Download PDFInfo
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- CN110981152A CN110981152A CN201911284269.6A CN201911284269A CN110981152A CN 110981152 A CN110981152 A CN 110981152A CN 201911284269 A CN201911284269 A CN 201911284269A CN 110981152 A CN110981152 A CN 110981152A
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- 239000010802 sludge Substances 0.000 title claims abstract description 109
- 238000007254 oxidation reaction Methods 0.000 title claims abstract description 105
- 230000003647 oxidation Effects 0.000 title claims abstract description 85
- 238000001035 drying Methods 0.000 title claims abstract description 54
- 238000000034 method Methods 0.000 title claims abstract description 24
- 238000007233 catalytic pyrolysis Methods 0.000 title claims abstract description 19
- 238000000197 pyrolysis Methods 0.000 claims abstract description 118
- 239000007789 gas Substances 0.000 claims abstract description 57
- 239000007787 solid Substances 0.000 claims abstract description 33
- 238000010438 heat treatment Methods 0.000 claims abstract description 32
- 238000002485 combustion reaction Methods 0.000 claims abstract description 29
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 22
- 239000003546 flue gas Substances 0.000 claims abstract description 22
- 230000003197 catalytic effect Effects 0.000 claims abstract description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 18
- 238000000746 purification Methods 0.000 claims abstract description 10
- 238000002156 mixing Methods 0.000 claims abstract description 6
- 239000003921 oil Substances 0.000 claims description 98
- 230000007704 transition Effects 0.000 claims description 11
- 239000002912 waste gas Substances 0.000 claims description 11
- 238000001816 cooling Methods 0.000 claims description 10
- 238000007789 sealing Methods 0.000 claims description 7
- 239000003054 catalyst Substances 0.000 claims description 6
- 238000002791 soaking Methods 0.000 claims description 6
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims description 5
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 5
- 229910052791 calcium Inorganic materials 0.000 claims description 5
- 239000011575 calcium Substances 0.000 claims description 5
- 230000010354 integration Effects 0.000 claims description 5
- 239000007788 liquid Substances 0.000 claims description 5
- 238000011084 recovery Methods 0.000 claims description 5
- 238000000926 separation method Methods 0.000 claims description 5
- 229910052710 silicon Inorganic materials 0.000 claims description 5
- 239000010703 silicon Substances 0.000 claims description 5
- 238000006864 oxidative decomposition reaction Methods 0.000 claims description 4
- 238000005516 engineering process Methods 0.000 abstract description 7
- 238000005265 energy consumption Methods 0.000 abstract description 4
- 239000000203 mixture Substances 0.000 abstract 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000010336 energy treatment Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000005496 tempering Methods 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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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
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/13—Treatment of sludge; Devices therefor by de-watering, drying or thickening by heating
-
- 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
- C02F11/06—Treatment of sludge; Devices therefor by oxidation
-
- 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
- C02F11/14—Treatment of sludge; Devices therefor by de-watering, drying or thickening with addition of chemical agents
- C02F11/143—Treatment of sludge; Devices therefor by de-watering, drying or thickening with addition of chemical agents using inorganic substances
-
- 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
- C02F11/14—Treatment of sludge; Devices therefor by de-watering, drying or thickening with addition of chemical agents
- C02F11/143—Treatment of sludge; Devices therefor by de-watering, drying or thickening with addition of chemical agents using inorganic substances
- C02F11/145—Treatment of sludge; Devices therefor by de-watering, drying or thickening with addition of chemical agents using inorganic substances using calcium compounds
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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
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
- C02F2101/32—Hydrocarbons, e.g. oil
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/10—Nature of the water, waste water, sewage or sludge to be treated from quarries or from mining activities
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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
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/40—Valorisation of by-products of wastewater, sewage or sludge processing
Abstract
The invention relates to a multi-section integrated device and a method for drying, catalytic pyrolysis and oxidation of oily sludge. The method comprises the steps of uniformly mixing oil sludge and a catalytic medium, conveying the mixture to a drying chamber, drying until the water content is less than or equal to 15%, allowing the dried oil sludge to enter a pyrolysis chamber for pyrolysis, allowing high-temperature flue gas generated after combustion of generated pyrolysis gas to provide heat for the heating chamber, allowing pyrolysis solid generated by pyrolysis to enter an oxidation chamber for oxidation, directly providing heat for the heating chamber by heat generated by oxidation, allowing generated residues to be available inorganic components, and allowing the high-temperature flue gas to pass through the heating chamber, be subjected to purification treatment and be discharged after reaching the. According to the invention, the water-containing oil sludge is finally treated into available inorganic residues and clean gas, so that the problems that the high-water-content oil sludge is not easy to pyrolyze, the oil content of the pyrolysis residues does not reach the standard, the heat utilization efficiency is low, the energy consumption is high, the tail gas temperature is high and the like are solved, and the large-scale engineering popularization and application of the pyrolysis technology in the field of oil-containing sludge treatment are greatly promoted.
Description
Technical Field
The invention belongs to the technical field of oily sludge energy treatment, and particularly relates to an oily sludge drying-catalytic pyrolysis-oxidation multi-stage integrated device and method.
Background
With the continuous development and progress of economy and technology, the treatment of the oily sludge becomes a hotspot and a difficult point in the field of environmental protection, the oily sludge is listed in national records of dangerous wastes, and the oily sludge needs to be subjected to harmless treatment according to the requirements of the national clean production promotion law. The prior oily sludge treatment technology mainly comprises tempering, dehydration, heat treatment, biological treatment and the like. In recent years, the pyrolysis process in the heat treatment technology has the advantages of thorough treatment of complex oil and toxic and harmful substances in sludge, high treatment speed, recoverable energy, energy conservation, less generated smoke, small secondary pollution and the like compared with the traditional incineration, and the pyrolysis becomes one of the mainstream technologies for treating oil-containing sludge internationally. However, the pyrolysis method has high energy consumption and can not directly combust and utilize the generated oil gas with high steam content for direct pyrolysis of the oil sludge with high water content; because the pyrolysis is in a closed oxygen-free environment, residues generated by pyrolysis easily contain a small amount of oil, and the high discharge requirement is not easily met; the water-containing oil sludge also has the problems of high temperature of discharged tail gas, low heat utilization efficiency and the like in the pyrolysis treatment process. The method is difficult to popularize and apply in a large range, and pollution to the environment is increasingly prominent along with the increase of the oil sludge yield.
Disclosure of Invention
In order to promote the wide popularization and application of the pyrolysis technology in the field of oily sludge treatment, the invention provides an oily sludge drying-catalytic pyrolysis-oxidation multi-section integration device and method.
In order to achieve the purpose, the technical scheme provided by the invention is as follows:
a multi-section integrated device for drying, catalytic pyrolysis and oxidation of oily sludge comprises a closed oil sludge adjusting tank, a feeding bin, a drying, catalytic pyrolysis and oxidation multi-section integrated system, a residue storage bin, a pyrolysis liquid recovery and separation device, a combustible gas combustion chamber, a tail gas purification device, a chimney, a water vapor cooling and demisting device, an air blower and a combustor;
the drying-catalytic pyrolysis-oxidation multi-section integrated system comprises a drying chamber, a pyrolysis chamber, an oxidation chamber, a dried oil sludge storage bin, a pyrolysis solid transition bin, a heating chamber and a soaking plate, wherein the drying chamber, the pyrolysis chamber and the oxidation chamber are arranged in the same heating chamber in an upper-middle-lower multi-layer mode;
uniformly mixing the oil sludge and a catalytic heat transfer medium in a closed oil sludge adjusting tank to form mixed oil sludge, and conveying the mixed oil sludge to a feeding bin for storage and sealing; the mixed oil sludge is conveyed to a drying chamber, dried oil sludge and dried waste gas are generated after drying, the dried oil sludge enters a pyrolysis chamber after passing through a dried oil sludge storage bin, and the waste gas generated by drying enters a combustible gas combustion chamber for combustion to generate high-temperature flue gas after being washed and demisted by a water vapor cooling and demisting device; the dried oil sludge enters a pyrolysis chamber for pyrolysis after passing through a dried oil sludge storage bin, pyrolysis is carried out to generate pyrolysis gas and low-oil pyrolysis solid, the pyrolysis gas is introduced into a combustible gas combustion chamber for combustion to generate high-temperature flue gas, and the pyrolysis solid enters an oxidation chamber for oxidation through a pyrolysis solid transition bin; the low-oil pyrolysis solid is in contact oxidation with air after entering the oxidation chamber, low oil in the low-oil pyrolysis solid is subjected to oxidative decomposition, available inorganic residues generated after oxidation enter a residue storage bin after being cooled at the tail end of the oxidation chamber for storage, heat generated after oxidation directly provides heat for drying-pyrolysis in the heating chamber, and tail gas generated by the drying-catalytic pyrolysis-oxidation multi-stage integrated system is purified by a tail gas purification device and then is discharged out of the chimney after reaching the standard.
The temperature of the drying chamber is controlled to be 100-200 ℃, and the water content of the dried oil sludge is less than or equal to 15%.
The temperature of the pyrolysis chamber is controlled at 500-650 ℃.
The high-temperature flue gas provides heat for drying-pyrolysis in the heating chamber from bottom to top; the oxidation chamber is arranged at the lower part of the high-temperature flue gas heating inlet, and the upper part of the oxidation chamber is porous and is in contact oxidation with air.
The catalytic heat transfer medium is a calcium-based or silicon-based catalyst medium with the granularity of 3-8mm and low specific heat and low-temperature catalytic performance.
A multi-stage integration method for drying, catalytic pyrolysis and oxidation of oily sludge comprises the following steps:
a. uniformly mixing the oil sludge and a catalytic heat transfer medium in a closed oil sludge adjusting tank to form mixed oil sludge, and conveying the mixed oil sludge to a feeding bin for storage and sealing;
b. b, conveying the mixed oil sludge in the step a to a drying chamber, drying to generate dried oil sludge and dried waste gas, wherein the dried oil sludge enters a pyrolysis chamber after passing through a dried oil sludge storage bin, and the waste gas generated by drying enters a combustible gas combustion chamber to be combusted to generate high-temperature flue gas after being washed and demisted by a water vapor cooling demisting device;
c. the dried oil sludge in the step b enters a pyrolysis chamber for pyrolysis after passing through a dried oil sludge storage bin, pyrolysis is carried out to generate pyrolysis gas and low-oil pyrolysis solid, the pyrolysis gas is introduced into a combustible gas combustion chamber for combustion to generate high-temperature flue gas, and the pyrolysis solid enters an oxidation chamber for oxidation through a pyrolysis solid transition bin;
d. and c, after entering the oxidation chamber, the low-oil pyrolysis solid in the step c is subjected to contact oxidation with air, low oil in the low-oil pyrolysis solid is subjected to oxidative decomposition, available inorganic residues generated after oxidation enter a residue storage bin after being cooled at the tail end of the oxidation chamber for storage, heat generated after oxidation directly provides heat for drying-pyrolysis in the heating chamber, and tail gas generated by the drying-catalytic pyrolysis-oxidation multi-stage integrated system is purified by a tail gas purification device and then is discharged through a chimney after reaching the standard.
The temperature of the drying chamber is controlled to be 100-200 ℃, and the water content of the dried oil sludge is less than or equal to 15%.
The temperature of the pyrolysis chamber is controlled at 500-650 ℃.
The high-temperature flue gas provides heat for drying-pyrolysis in the heating chamber, the oxidation chamber is arranged at the lower part of the high-temperature flue gas heating inlet, and the upper part of the oxidation chamber is porous and is directly contacted and oxidized with air.
The catalytic heat transfer medium is a calcium-based or silicon-based catalyst medium with the granularity of 3-8mm and low specific heat and low-temperature catalytic performance.
Compared with the prior art, the multi-section integration device and the method for drying, catalytic pyrolysis and oxidation of the oily sludge have the following characteristics and beneficial effects:
1. the problem that the high-water-content oil sludge is not suitable for pyrolysis is solved by integrating drying and adding a catalyst for catalytic pyrolysis, the water content of the oil sludge is reduced to below 15% by drying treatment, so that the energy consumption of subsequent pyrolysis is reduced, meanwhile, heat can be provided for a heating chamber after waste gas generated by drying and pyrolysis gas generated by pyrolysis are combusted, and the heat utilization efficiency is improved;
2. the invention integrates pyrolysis and oxidation, the low-oil-quantity pyrolysis solid after the pyrolysis is oxidized by contacting with air in an oxidation chamber to remove residual trace oil, inorganic residues generated by the oxidation are available inorganic components, and heat generated by the oxidation directly provides heat for the heating chamber;
3. the catalytic heat transfer medium added in the invention improves the crushing efficiency and the heat conduction efficiency of the oil sludge in the drying section and the pyrolysis efficiency in the pyrolysis section;
4. the tail gas generated by the system can reach the standard after being purified by the tail gas purifying device, and the problem of high temperature of the tail gas is solved.
Drawings
FIG. 1 is a schematic diagram of an oily sludge drying-catalytic pyrolysis-oxidation multi-stage integrated apparatus and method according to an embodiment of the present invention;
FIG. 2 is a schematic top view of a drying-catalytic pyrolysis-oxidation multi-stage integrated system of an oily sludge drying-catalytic pyrolysis-oxidation multi-stage integrated apparatus and method according to an embodiment of the present invention;
fig. 3 is a schematic sectional view a-a of a drying-catalytic pyrolysis-oxidation multi-stage integrated system of an oily sludge drying-catalytic pyrolysis-oxidation multi-stage integrated apparatus and method according to an embodiment of the present invention.
1, sealing an oil sludge adjusting tank; 2, feeding a material bin; 3, a drying chamber; 4, a pyrolysis chamber; 5, an oxidation chamber; 6, drying an oil sludge transition bin; 7 pyrolyzing the solid transition bin; 8, a residue storage bin; 9, a pyrolysis liquid recovery and separation device; 10 a combustible gas combustion chamber; 11 a tail gas purification device; 12, a chimney; 13 a vapor cooling and demisting device; 14 a blower; 15 a burner; 16 drying, catalytic pyrolysis and oxidation multi-stage integrated system; 17 a heating chamber; and 18 soaking plates.
Detailed Description
The invention provides a multi-stage integrated device and a method for drying, catalytic pyrolysis and oxidation of oily sludge, and the detailed and complete description of the method and the device are combined with the accompanying drawings and the specific embodiment, and the specific embodiment is only a part of examples of the invention, but not all examples. All other examples obtained without inventive step by a person skilled in the art are within the scope of the invention.
As shown in fig. 1, fig. 2 and fig. 3, the multi-stage integrated device for drying, catalytic pyrolysis and oxidation of oily sludge comprises a closed oil sludge adjusting tank 1, a feeding bin 2, a drying, catalytic pyrolysis and oxidation multi-stage integrated system 16, a residue storage bin 8, a pyrolysis liquid recovery and separation device 9, a combustible gas combustion chamber 10, a tail gas purification device 11, a chimney 12, a vapor cooling and demisting device 13, an air blower 14 and a burner 15;
the drying-catalytic pyrolysis-oxidation multi-section integrated system 16 comprises a drying chamber 3, a pyrolysis chamber 4, an oxidation chamber 5, a dried oil sludge storage bin 6, a pyrolysis solid transition bin 7, a heating chamber 17 and a soaking plate 18, wherein the drying chamber 3, the pyrolysis chamber 4 and the oxidation chamber 5 are arranged in the same heating chamber 17 in a multi-layer mode from top to bottom;
the drying oil sludge storage bin 6 and the pyrolysis solid transition bin 7 are arranged outside the heating chamber 17, and spiral feeding and discharging are designed to play a role in isolating and sealing the drying chamber 3 and the pyrolysis chamber 4 and the oxidation chamber 5.
A multi-stage integration method for drying, catalytic pyrolysis and oxidation of oily sludge comprises the following steps:
a, evenly mixing oil sludge and a catalytic heat transfer medium in a closed oil sludge adjusting tank 1 to form mixed oil sludge, and conveying the mixed oil sludge to a feeding bin 2 for storage and sealing;
b, conveying the mixed oil sludge to a drying chamber 3, drying to generate dried oil sludge and dried waste gas, wherein the dried oil sludge enters a pyrolysis chamber 4 after passing through a dried oil sludge storage bin 6, and the waste gas generated by drying enters a combustible gas combustion chamber 10 to be combusted to generate high-temperature flue gas after being washed and demisted by a water vapor cooling demisting device 13;
c, the dried oil sludge passes through a dried oil sludge storage bin 6 and then enters a pyrolysis chamber 4 for pyrolysis, pyrolysis gas and low-oil pyrolysis solid are generated through pyrolysis, the pyrolysis gas is introduced into a combustible gas combustion chamber 10 for combustion to generate high-temperature flue gas, and the pyrolysis solid enters an oxidation chamber 5 through a pyrolysis solid transition bin 7 for oxidation;
d, after entering the oxidation chamber 5, the low-oil pyrolytic solid is in contact oxidation with air, low oil in the low-oil pyrolytic solid is oxidized and decomposed, available inorganic residues generated after oxidation are subjected to shower cooling at the tail end of the oxidation chamber 5 and enter the residue storage bin 8 for storage after being cooled by a water jacket, heat generated after oxidation directly provides heat for drying-pyrolysis in the heating chamber 17, and tail gas generated by the drying-catalytic pyrolysis-oxidation multi-stage integrated system 16 is purified by the tail gas purification device 11 and then is discharged to the standard through the chimney 12.
The temperature of the drying chamber 3 is controlled to be 100-200 ℃, and the water content of the dried oil sludge is below 15%.
The temperature of the pyrolysis chamber (4) is controlled at 500-650 ℃, and the pyrolysis retention time is 30-40 min.
The high-temperature flue gas provides heat for drying-pyrolysis in the heating chamber 17 from bottom to top; the oxidation chamber 5 is arranged at the lower part of the high-temperature flue gas heating inlet, and the upper part of the oxidation chamber 5 is porous and is directly contacted and oxidized with air.
The catalytic heat transfer medium is a calcium-based or silicon-based catalyst medium with the granularity of 3-8mm and low specific heat and low-temperature catalytic performance.
In the heating chamber 17, soaking plates 18 are arranged between the drying chamber 3 and the pyrolysis chamber 4 and between the pyrolysis chamber 4 and the oxidation chamber 5, and the soaking plates 18 can enable each reactor in the heating chamber 17 to be heated uniformly, so that the heat utilization efficiency is improved.
The blower 14 is mainly used for supplying air, promoting the full combustion of the gas in the gas combustion chamber 10 and the contact oxidation of the pyrolysis solid with air in the low oil amount in the oxidation chamber 5.
The burner 15 is used for ignition starting of the device, or is used as energy supply for supplying heat to the device when the heat is insufficient.
The pyrolysis gas is directly introduced into the combustible gas combustion chamber 10 for combustion or the residual non-condensable gas can be introduced into the combustible gas combustion chamber 10 for combustion after the condensed gas in the pyrolysis gas is liquefied and recovered by the pyrolysis liquid recovery and separation device 9.
According to the invention, drying, pyrolysis and oxidation are integrated, and a proper catalytic heat transfer medium is added to finally treat available inorganic residue and clean gas, so that the problems that high-water-content oil sludge is difficult to pyrolyze, pyrolysis residue oil content does not reach the standard, heat utilization efficiency is low, energy consumption is high, tail gas temperature is high and the like are solved, the large-scale engineering popularization and application of a pyrolysis technology in the field of oil-containing sludge treatment are greatly promoted, and the method has great significance for development of the oil field industry.
Claims (10)
1. A multi-section integrated device for drying, catalytic pyrolysis and oxidation of oily sludge is characterized in that: the device comprises a closed oil sludge adjusting tank (1), a feeding bin (2), a drying-catalytic pyrolysis-oxidation multi-section integrated system (16), a residue storage bin (8), a pyrolysis liquid recovery and separation device (9), a combustible gas combustion chamber (10), a tail gas purification device (11), a chimney (12), a water vapor cooling and demisting device (13), an air blower (14) and a combustor (15);
the drying-catalytic pyrolysis-oxidation multi-section integrated system (16) comprises a drying chamber (3), a pyrolysis chamber (4), an oxidation chamber (5), a dried oil sludge storage bin (6), a pyrolysis solid transition bin (7), a heating chamber (17) and a soaking plate (18), wherein the drying chamber (3), the pyrolysis chamber (4) and the oxidation chamber (5) are arranged in the same heating chamber (17) in a multi-layer mode from top to bottom;
evenly mixing oil sludge and a catalytic heat transfer medium in a closed oil sludge adjusting tank (1) to form mixed oil sludge, and conveying the mixed oil sludge to a feeding bin (2) for storage and sealing; the mixed oil sludge is conveyed to a drying chamber (3) and dried to generate dried oil sludge and dried waste gas, wherein the dried oil sludge enters a pyrolysis chamber (4) after passing through a dried oil sludge storage bin (6), and the waste gas generated by drying enters a combustible gas combustion chamber (10) for combustion to generate high-temperature flue gas after being washed and demisted by a water vapor cooling and demisting device (13); the dried oil sludge enters a pyrolysis chamber (4) for pyrolysis after passing through a dried oil sludge storage bin (6), pyrolysis gas and low-oil pyrolysis solid are generated through pyrolysis, the pyrolysis gas is introduced into a combustible gas combustion chamber (10) for combustion to generate high-temperature flue gas, and the pyrolysis solid enters an oxidation chamber (5) through a pyrolysis solid transition bin (7) for oxidation; the low-oil pyrolysis solid is subjected to contact oxidation with air after entering the oxidation chamber (5), low oil in the low-oil pyrolysis solid is subjected to oxidative decomposition, available inorganic residues generated after oxidation enter the residue storage bin (8) after being cooled at the tail end of the oxidation chamber (5) for storage, heat generated after oxidation directly provides heat for drying-pyrolysis in the heating chamber (17), and tail gas generated by the drying-catalytic pyrolysis-oxidation multi-section integrated system (16) is purified by the tail gas purification device (11) and then is discharged out after reaching the standard through the chimney (12).
2. The oily sludge drying-catalytic pyrolysis-oxidation multi-stage integrated device as claimed in claim 1, wherein: the temperature of the drying chamber (3) is controlled to be 100-200 ℃, and the water content of the dried oil sludge is less than or equal to 15%.
3. The oily sludge drying-catalytic pyrolysis-oxidation multi-stage integrated device as claimed in claim 1, wherein: the temperature of the pyrolysis chamber (4) is controlled at 500-650 ℃.
4. The oily sludge drying-catalytic pyrolysis-oxidation multi-stage integrated device as claimed in claim 1, wherein: the high-temperature flue gas provides heat for drying-pyrolysis in the heating chamber (17) from bottom to top; the oxidation chamber (5) is arranged at the lower part of the high-temperature flue gas heating inlet, and the upper part of the oxidation chamber (5) is porous and is in contact oxidation with air.
5. The oily sludge drying-catalytic pyrolysis-oxidation multi-stage integrated device as claimed in claim 1, wherein: the catalytic heat transfer medium is a calcium-based or silicon-based catalyst medium with the granularity of 3-8mm and low specific heat and low-temperature catalytic performance.
6. A multi-stage integration method for drying, catalytic pyrolysis and oxidation of oily sludge is characterized by comprising the following steps:
a. evenly mixing oil sludge and a catalytic heat transfer medium in a closed oil sludge adjusting tank (1) to form mixed oil sludge, and conveying the mixed oil sludge to a feeding bin (2) for storage and sealing;
b. the mixed oil sludge in the step a is conveyed to a drying chamber (3) and dried to generate dried oil sludge and dried waste gas, wherein the dried oil sludge enters a pyrolysis chamber (4) after passing through a dried oil sludge storage bin (6), and the waste gas generated by drying enters a combustible gas combustion chamber (10) for combustion to generate high-temperature flue gas after being washed and demisted by a water vapor cooling demisting device (13);
c. the dried oil sludge in the step b passes through a dried oil sludge storage bin (6) and then enters a pyrolysis chamber (4) for pyrolysis, pyrolysis generates pyrolysis gas and low-oil pyrolysis solid, the pyrolysis gas is introduced into a combustible gas combustion chamber (10) for combustion to generate high-temperature flue gas, and the pyrolysis solid enters an oxidation chamber (5) through a pyrolysis solid transition bin (7) for oxidation;
d. and c, after entering the oxidation chamber (5), the low-oil-amount pyrolysis solid in the step c is subjected to contact oxidation with air, the low oil content in the low-oil-amount pyrolysis solid is subjected to oxidative decomposition, available inorganic residues generated after oxidation enter the residue storage bin (8) after being cooled at the tail end of the oxidation chamber (5) for storage, heat generated after oxidation directly provides heat for drying-pyrolysis in the heating chamber (17), and tail gas generated by the drying-catalytic pyrolysis-oxidation multi-stage integrated system (16) is purified by the tail gas purification device (11) and then is discharged through the chimney (12) to reach the standard.
7. The multi-stage integrated method for drying, catalytic pyrolysis and oxidation of oily sludge according to claim 6, characterized in that: the temperature of the drying chamber (3) is controlled to be 100-200 ℃, and the water content of the dried oil sludge is less than or equal to 15%.
8. The multi-stage integrated method for drying, catalytic pyrolysis and oxidation of oily sludge according to claim 6, characterized in that: the temperature of the pyrolysis chamber (4) is controlled at 500-650 ℃.
9. The multi-stage integrated method for drying, catalytic pyrolysis and oxidation of oily sludge according to claim 6, characterized in that: the high-temperature flue gas provides heat for drying-pyrolysis in the heating chamber (17), the oxidation chamber (5) is arranged at the lower part of the high-temperature flue gas heating inlet, and the upper part of the oxidation chamber (5) is porous and is in contact oxidation with air.
10. The multi-stage integrated method for drying, catalytic pyrolysis and oxidation of oily sludge according to claim 6, characterized in that: the catalytic heat transfer medium is a calcium-based or silicon-based catalyst medium with the granularity of 3-8mm and low specific heat and low-temperature catalytic performance.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911284269.6A CN110981152A (en) | 2019-12-13 | 2019-12-13 | Multi-stage integrated device and method for drying, catalytic pyrolysis and oxidation of oily sludge |
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Cited By (3)
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| CN113429990A (en) * | 2021-06-22 | 2021-09-24 | 浙江宜可欧环保科技有限公司 | Method for treating organic pollutants by combining anaerobic pyrolysis and aerobic oxidation |
| CN113637491A (en) * | 2021-08-21 | 2021-11-12 | 浙江宜可欧环保科技有限公司 | Solid waste pyrolysis-oxidation cooperative disposal equipment |
| CN113717755A (en) * | 2021-08-21 | 2021-11-30 | 浙江宜可欧环保科技有限公司 | Method for treating organic waste by combining oxygen-free pyrolysis with oxygen-deficient gasification |
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