CN211645029U - Oily sludge drying-catalytic pyrolysis-oxidation multi-section integrated device - Google Patents
Oily sludge drying-catalytic pyrolysis-oxidation multi-section integrated device Download PDFInfo
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- CN211645029U CN211645029U CN201922238578.1U CN201922238578U CN211645029U CN 211645029 U CN211645029 U CN 211645029U CN 201922238578 U CN201922238578 U CN 201922238578U CN 211645029 U CN211645029 U CN 211645029U
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Abstract
The utility model discloses an oily sludge drying-catalytic pyrolysis-oxidation multistage integrated device mainly includes drying chamber, pyrolysis chamber, oxidizing chamber etc. of arranging same heating chamber upper and middle lower floor in. 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 standards. The utility model discloses be available inorganic residue and clean gas with aqueous fatlute final treatment, solved the difficult pyrolysis of high moisture content fatlute, pyrolysis residue oil content not up to standard, heat utilization efficiency is low, the energy consumption is high, tail gas temperature scheduling problem, greatly promoted the engineering popularization and application on a large scale of pyrolysis technique in the oily sludge field of handling.
Description
Technical Field
The utility model belongs to the technical field of oily sludge energy treatment, in particular to an oily sludge drying-catalytic pyrolysis-oxidation multistage integrated device.
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. But the high-water-content oil sludge is directly pyrolyzed, the energy consumption is high, and the generated high-steam-content oil gas cannot be directly combusted and utilized; 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.
SUMMERY OF THE UTILITY MODEL
In order to promote the pyrolysis technology and at the wide popularization and application in oily sludge treatment field, the utility model provides an oily sludge drying-catalytic pyrolysis-oxidation multistage integrated device, through with mummification-pyrolysis-oxidation integration an organic whole, add suitable catalytic heat transfer medium simultaneously, solve the difficult pyrolysis of high moisture content fatlute, pyrolysis residue oil content is not up to standard, the heat utilization efficiency is low, the energy consumption is high, tail gas temperature scheduling problem, very big promotion pyrolysis technology is in the engineering popularization and application on a large scale in oily sludge processing field, it is significant to the development of oil field trade.
In order to achieve the above purpose, the utility model provides a technical scheme 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.
Compared with the prior art, the oily sludge drying-catalytic pyrolysis-oxidation multi-section integrated device has 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 high oil gas atmosphere that produces in the airtight reactor of current external heating formula pyrolysis can lead to the pyrolysis solid of the low oil mass after dry pyrolysis to contain trace oil content, is difficult to discharge to reach standard, also can bring the too high, high scheduling problem of tail gas temperature of energy consumption, the utility model discloses integrate pyrolysis and oxidation, the pyrolysis solid of the low oil mass after pyrolysis removes residual trace oil content through oxidation with the air contact in the oxidizing chamber, and the inorganic residue that the oxidation produced is available inorganic component, and the heat that the oxidation produced directly provides the heat for the heating chamber;
3. the catalytic heat transfer medium added in the utility model improves the crushing efficiency and the heat transfer efficiency of the oil sludge in the drying section and the pyrolysis efficiency of the pyrolysis section;
4. the utility model discloses the tail gas that well system produced can reach the standard after tail gas cleanup unit purification treatment and arrange outward, does not have the high problem of tail gas temperature.
Drawings
FIG. 1 is a schematic diagram of an oily sludge drying-catalytic pyrolysis-oxidation multi-stage integrated device 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 device according to an embodiment of the present invention;
fig. 3 is a schematic sectional view of a section a-a of a drying-catalytic pyrolysis-oxidation multi-stage integrated system of an oily sludge drying-catalytic pyrolysis-oxidation multi-stage integrated device 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 utility model provides an oily sludge drying-catalytic pyrolysis-oxidation multistage integrated device, the following combines the attached drawing and the embodiment to carry out detailed, complete description to the utility model, and the embodiment that describes is only partial case of the utility model, and not all examples. All other examples obtained without inventive work by a person skilled in the art are within the scope of the present 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.
The specific operation steps are as follows:
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.
The utility model discloses an it is integrative with mummification-pyrolysis-oxidation integration, add suitable catalysis heat transfer medium simultaneously, final treatment is usable inorganic residue and clean gas, has solved that high moisture content fatlute is difficult for the pyrolysis, pyrolysis residue oil content is not up to standard, heat utilization efficiency is low, the energy consumption is high, tail gas temperature scheduling problem, very big promotion the pyrolysis technique handle the engineering popularization and application on a large scale in the field at oily sludge, and is significant to the development of oil field trade.
Claims (5)
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.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110981152A (en) * | 2019-12-13 | 2020-04-10 | 王凯军 | Multi-stage integrated device and method for drying, catalytic pyrolysis and oxidation of oily sludge |
| CN117003468A (en) * | 2023-09-28 | 2023-11-07 | 珙县华洁危险废物治理有限责任公司成都分公司 | Shale gas drilling oil sludge dry residue treatment device and system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110981152A (en) * | 2019-12-13 | 2020-04-10 | 王凯军 | Multi-stage integrated device and method for drying, catalytic pyrolysis and oxidation of oily sludge |
| CN117003468A (en) * | 2023-09-28 | 2023-11-07 | 珙县华洁危险废物治理有限责任公司成都分公司 | Shale gas drilling oil sludge dry residue treatment device and system |
| CN117003468B (en) * | 2023-09-28 | 2023-12-05 | 珙县华洁危险废物治理有限责任公司成都分公司 | Shale gas drilling oil sludge dry residue treatment device and system |
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