CN112062435A - Oil sludge pyrolysis treatment device and process thereof - Google Patents
Oil sludge pyrolysis treatment device and process thereof Download PDFInfo
- Publication number
- CN112062435A CN112062435A CN202010878650.1A CN202010878650A CN112062435A CN 112062435 A CN112062435 A CN 112062435A CN 202010878650 A CN202010878650 A CN 202010878650A CN 112062435 A CN112062435 A CN 112062435A
- Authority
- CN
- China
- Prior art keywords
- pyrolysis
- flue gas
- combustion
- outlet
- oil sludge
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
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
- C02F11/10—Treatment of sludge; Devices therefor by pyrolysis
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D50/00—Combinations of methods or devices for separating particles from gases or vapours
- B01D50/20—Combinations of devices covered by groups B01D45/00 and B01D46/00
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/38—Removing components of undefined structure
- B01D53/40—Acidic components
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/77—Liquid phase processes
- B01D53/78—Liquid phase processes with gas-liquid contact
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G7/00—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals
- F23G7/06—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste gases or noxious gases, e.g. exhaust gases
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- General Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biomedical Technology (AREA)
- Water Supply & Treatment (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Gasification And Melting Of Waste (AREA)
- Treatment Of Sludge (AREA)
Abstract
The invention discloses an oil sludge pyrolysis treatment device and a process thereof, wherein the treatment device comprises an oil sludge pyrolysis system, a pyrolysis gas circulation system, a flue gas waste heat recovery system and a flue gas treatment system; the oil sludge pyrolysis system comprises a pyrolysis kiln, an oil sludge feeding screw and a combustion chamber; the pyrolysis gas circulating system comprises a cyclone separator and a high-temperature pyrolysis gas circulating fan, and the high-temperature pyrolysis gas circulating fan is connected with the combustion chamber; the flue gas waste heat recovery system comprises a burnout chamber, a waste heat boiler and an air preheater; the air outlet of the air preheater is connected with a first combustion fan and a second combustion fan; the first combustion fan is connected with the combustion chamber, and the second combustion fan is connected with the burnout chamber; the flue gas treatment system comprises flue gas purification equipment and flue gas emission equipment. The oil sludge pyrolysis treatment device can effectively treat the oil-containing sludge, has the comprehensive advantages of low treatment cost, high treatment degree, low energy consumption and the like, and can reduce the content of petroleum in the oil-containing sludge to be less than 0.3 percent.
Description
Technical Field
The invention relates to the technical field of oil sludge treatment, in particular to an oil sludge pyrolysis treatment device and an oil sludge pyrolysis treatment process.
Background
The oily sludge refers to oily solid waste generated in the processes of oil exploitation, transportation, refining and oily sewage treatment. Oily sludge produced in the petrochemical industry often contains a large amount of petroleum, benzene, phenol, anthracene and other toxic and harmful substances, and if the oily sludge is not treated in time, the stacking or the landfill of the oily sludge not only occupies a large amount of cultivated land, but also causes serious pollution to surrounding soil, water and air. Meanwhile, as the oily sludge is listed as dangerous waste by the nation, if the oily sludge is not treated to eliminate the hazard factors, the oily sludge also has great influence on the sustainable development of enterprises. Therefore, there is a need for treatment of oily sludge, whether from a social environmental standpoint or from the sustainability development standpoint of the enterprise itself.
At present, the treatment method of the oily sludge mainly comprises the following methods:
(1) a landfill method: directly burying the oily sludge into a special sludge storage pit by selecting a proper geographical position, and then filling the oil-containing sludge by earthwork to restore the original landform;
(2) direct burning method: directly adopting high-temperature incineration in a special incinerator to reduce and harmlessly treat the oily sludge;
(3) the biological method comprises the following steps: the method is used for carrying out harmless treatment on oily sludge by a land cultivation method, a composting method, a sludge bioreactor method and the like.
The above schemes are comprehensively analyzed, and although the first scheme has the advantages of small investment, convenience, directness and the like, the soil and the environment around the landfill area are very easily polluted for a long time, so that the health and the sustainable development of human beings are seriously harmed finally; the second scheme has the advantages of high treatment speed, high reduction degree, thorough harmless degree and the like, but also has the defects of high treatment cost, high process energy consumption, easy ceramic coking of discharged dry soil and high technical requirement; the third scheme has the advantages of small one-time investment, low treatment cost, capability of effectively controlling pollutant transfer and the like, but also has the defects of great influence by environmental factors, long treatment time, high special selectivity of efficient microorganisms and no universal application.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides an oil sludge pyrolysis treatment device, which can be used for solving the traditional problems, can be used for effectively treating oil-containing sludge and has the comprehensive advantages of low treatment cost, high treatment degree, low energy consumption and the like.
The invention also provides an oil sludge pyrolysis treatment process.
The invention is realized by adopting the following technical scheme:
an oil sludge pyrolysis treatment device comprises an oil sludge pyrolysis system, a pyrolysis gas circulation system, a flue gas waste heat recovery system and a flue gas treatment system which are sequentially connected;
the oil sludge pyrolysis system comprises a pyrolysis kiln, an oil sludge feeding screw connected to the pyrolysis kiln and a combustion chamber; the pyrolysis kiln is provided with an oil sludge inlet, a high-temperature gas inlet and a pyrolysis gas outlet; the oil sludge inlet is connected with an outlet of the oil sludge feeding screw, and the high-temperature gas inlet is connected with a hot flue gas outlet of the combustion chamber;
the pyrolysis gas circulating system comprises a cyclone separator connected with the pyrolysis gas outlet and a high-temperature pyrolysis gas circulating fan connected with the outlet of the cyclone separator; the outlet of the high-temperature pyrolysis gas circulating fan is connected with the circulating pyrolysis gas inlet of the combustion chamber;
the flue gas waste heat recovery system comprises a burnout chamber connected with the outlet of the cyclone separator, a waste heat boiler connected with the flue gas outlet of the burnout chamber and an air preheater connected with the flue gas outlet of the waste heat boiler; a first combustion fan and a second combustion fan which are arranged in parallel are installed on an air outlet pipeline of the air preheater; the outlet of the first combustion fan is connected with the combustion air inlet of the combustion chamber, and the outlet of the second combustion fan is connected with the combustion air inlet of the burnout chamber;
the flue gas treatment system comprises flue gas purification equipment and flue gas emission equipment which are connected with a flue gas outlet of the air preheater.
Preferably, the oil sludge inlet is located at one end of the pyrolysis kiln close to the pyrolysis gas outlet, and the high-temperature gas inlet is located at one end of the pyrolysis kiln far away from the pyrolysis gas outlet.
Preferably, the combustion chamber is also connected with a first combustion-supporting fan and a first fuel inlet pipe; the inlet of the circulating pyrolysis gas and the outlet of the first combustion-supporting fan are both positioned on the body of the combustion chamber, and the outlet of the first fuel inlet pipe and the outlet of the first combustion-supporting fan are both connected with the combustor of the combustion chamber.
Preferably, the burnout chamber is further connected with a second combustion-supporting fan and a second fuel inlet pipe; the inlet of the second combustion-supporting fan and the inlet of the pyrolysis gas of the burnout chamber are respectively positioned at two sides of the burnout chamber, and the outlet of the second fuel inlet pipe and the outlet of the second combustion-supporting fan are both connected with the burner of the burnout chamber.
Preferably, a boiler ash discharge valve is arranged on an ash discharge port of the waste heat boiler; and a dry soil discharge hole is formed at one end of the pyrolysis kiln close to the combustion chamber.
Preferably, the flue gas purification equipment comprises a semi-dry deacidification tower and a bag-type dust collector which are connected in sequence; an alkali liquor spray gun and an emergency water supply spray gun are arranged on the semi-dry deacidification tower; the alkali liquor spray gun is connected with an alkali liquor input pipe and an atomized air pipe, and the atomized air pipe is used for atomizing alkali liquor in the alkali liquor input pipe; the emergency water supply spray gun is connected with a compressed air pipe and a water input pipe, wherein the compressed air pipe is used for pressurizing and atomizing water in the water input pipe and conveying the water to the emergency water supply spray gun.
Preferably, a bag dust discharging valve is arranged on a dust discharging port of the bag-type dust collector.
Preferably, the fume emission equipment with the sack cleaner links to each other, the fume emission equipment include the flue gas draught fan and with the chimney that the flue gas draught fan links to each other, the draught fan be used for with flue gas after the dust removal in the sack cleaner is taken out and is sent into carry out high altitude in the chimney and discharge.
The invention also provides an oil sludge pyrolysis treatment process, which comprises the following steps:
s1: oil-containing sludge is spirally fed to a pyrolysis kiln through oil sludge feeding; the combustion chamber supplies heat to the pyrolysis kiln, and hot flue gas generated by combustion in the combustion chamber is pyrolyzed with oil sludge in the pyrolysis kiln in a mode of countercurrent direct contact; discharging the dry soil after pyrolysis from the lower part of the pyrolysis kiln;
s2: pyrolysis gas generated after oil sludge is pyrolyzed is discharged into a cyclone separator through a pyrolysis gas outlet of a pyrolysis kiln, and dust removal treatment is carried out;
s3: the pyrolysis gas treated by the cyclone separator is divided into two parts; part of the pyrolysis gas is pumped to a combustion chamber by a high-temperature pyrolysis gas circulating fan to be used as fuel for combustion; the other part of the pyrolysis gas enters a burnout chamber for burning to obtain high-temperature flue gas;
s4: the high-temperature flue gas enters a waste heat boiler for heat recovery and is used for generating steam;
s5: high-temperature flue gas from the waste heat boiler enters an air preheater, and heat in the flue gas is continuously recovered for heating combustion air; the heated combustion air is divided into two paths, and one path of combustion air is conveyed to the combustion chamber through a first combustion fan; the other path of combustion air is conveyed to the burnout chamber through a second combustion fan;
s6: the flue gas after heat exchange is output to a flue gas treatment system and is discharged after purification treatment.
Preferably, in step S1, the temperature of the hot flue gas inlet of the pyrolysis kiln is controlled to be 600 ℃ to 1100 ℃, the temperature of the pyrolysis gas outlet of the pyrolysis kiln is controlled to be 200 ℃ to 400 ℃, and the operating pressure of the pyrolysis kiln is negative pressure; in step S3, the operation temperature of the burnout chamber is controlled to be 800-1200 ℃; in step S4, the flue gas outlet temperature of the exhaust-heat boiler is controlled to 200 to 400 ℃.
Compared with the prior art, the invention has the beneficial effects that:
(1) the oil sludge pyrolysis treatment device can effectively treat the oil-containing sludge, has the comprehensive advantages of low treatment cost, high treatment degree, low energy consumption and the like, and can reduce the content of petroleum in the oil-containing sludge to be less than 0.3 percent.
(2) The invention utilizes the pyrolyzability of the pyrolyzable substances in the oily sludge to remove toxic factors such as petroleum and organic matters in the oily sludge.
(3) The invention adopts a micro-negative pressure mode to carry out pyrolysis at a relatively low temperature, on one hand, the energy consumption is saved, on the other hand, the phenomena of ceramic agglomeration and the like of the oil sludge in the high-temperature pyrolysis or incineration time are prevented, and simultaneously, the secondary pollution caused by the leakage of harmful gas can also be prevented.
(4) The invention adopts the mode of partial backflow combustion of the flue gas containing combustible materials, so that on one hand, energy can be saved, and on the other hand, the stability of micro-negative pressure operation in the pyrolysis process can be ensured.
(5) The invention adopts the way of controlling the key point pressure drop of the system to automatically control the amount of the returned pyrolysis gas, thereby ensuring the stability and continuous operability of the system operation.
(6) The method can reduce the content of petroleum in the oily sludge to be below 0.3 percent, and simultaneously completely remove toxic and harmful organic substances, thereby reducing, harmlessly treating and recycling resources.
(7) The invention fully recycles the waste heat resources generated by the system, does not generate secondary pollution, and effectively reduces the operation cost of enterprises.
(8) Compared with other low oil-containing oil sludge treatment processes, the process disclosed by the invention can effectively shorten the treatment time of the oil sludge, and can save more than 10% of energy consumption compared with the same type of oil sludge treatment devices, so that the process has good economic and social benefits.
Drawings
Fig. 1 is a schematic process flow diagram of the oil sludge pyrolysis treatment device.
In the figure: 10. a pyrolysis kiln; 11. an oil sludge inlet; 12. a high temperature gas inlet; 13. a pyrolysis gas outlet; 20. oil sludge feeding screw; 21. a cyclone separator; 22. a high-temperature pyrolysis gas circulating fan; 30. a combustion chamber; 35. a first combustion fan; 36. a first fuel inlet pipe; 41. a burnout chamber; 410. a second combustion fan; 411. a second fuel inlet pipe; 42. a waste heat boiler; 43. an air preheater; 430. a first combustion fan; 431. a second combustion fan; 45. a semi-dry deacidification tower; 46. a bag-type dust collector; 47. a flue gas induced draft fan; 48. and (4) a chimney.
Detailed Description
The invention will be further described with reference to the accompanying drawings and the detailed description below:
please refer to fig. 1, which is a schematic process flow diagram of an oil sludge pyrolysis treatment apparatus according to the present invention, the oil sludge pyrolysis treatment apparatus includes an oil sludge pyrolysis system, a pyrolysis gas circulation system, a flue gas waste heat recovery system, and a flue gas treatment system, which are connected in sequence, and the oil sludge pyrolysis system is configured to perform pyrolysis in a manner that hot flue gas directly contacts with oil sludge; the pyrolysis gas circulating system is used for removing ash slag carried by pyrolysis gas and returning part of the pyrolysis gas to the oil sludge pyrolysis system for recycling; the flue gas waste heat recovery system is used for burning the pyrolysis gas again, removing inflammable and harmful substances contained in the flue gas, and recycling the heat of the generated high-temperature flue gas; the flue gas treatment system is used for purifying flue gas and removing acid substances in the flue gas so as to facilitate high-altitude emission. The oil sludge pyrolysis treatment device can effectively treat the oil-containing sludge, has the comprehensive advantages of low treatment cost, high treatment degree, low energy consumption and the like, and can reduce the content of petroleum in the oil-containing sludge to be less than 0.3%.
Specifically, the oil sludge pyrolysis system comprises a pyrolysis kiln 10, an oil sludge feeding screw 20 connected to the pyrolysis kiln 10, and a combustion chamber 30; the pyrolysis kiln 10 is provided with an oil sludge inlet 11, a high-temperature gas inlet 12 and a pyrolysis gas outlet 13; the oil sludge inlet 11 is connected with the outlet of the oil sludge feeding screw 20, and the high-temperature gas inlet 12 is connected with the hot flue gas outlet of the combustion chamber 30. The oil sludge inlet 11 is located at one end of the pyrolysis kiln 10 close to the pyrolysis gas outlet 13, and the high-temperature gas inlet 12 is located at one end of the pyrolysis kiln 10 far away from the pyrolysis gas outlet 13, so that hot flue gas generated by combustion in the combustion chamber 30 is pyrolyzed with oil sludge in the pyrolysis kiln 10 in a countercurrent direct contact manner. One end of the pyrolysis kiln 10 close to the combustion chamber 30 is provided with a dry soil discharge hole so as to facilitate the discharge of dry soil.
The pyrolysis gas circulating system comprises a cyclone separator 21 connected with the pyrolysis gas outlet 13 and a high-temperature pyrolysis gas circulating fan 22 connected with the outlet of the cyclone separator 21; the outlet of the high-temperature pyrolysis gas circulating fan 22 is connected with the circulating pyrolysis gas inlet of the combustion chamber 30. The cyclone separator 21 is used for removing ash entrained by pyrolysis gas, and the high-temperature pyrolysis gas circulating fan 22 is used for sending part of the pyrolysis gas to the combustion chamber 30 to be combusted as fuel, so that the pyrolysis gas can be reused.
The flue gas waste heat recovery system comprises a burnout chamber 41 connected with the outlet of the cyclone separator 21, a waste heat boiler 42 connected with the flue gas outlet of the burnout chamber 41 and an air preheater 43 connected with the flue gas outlet of the waste heat boiler 42; a first combustion fan 430 and a second combustion fan 431 which are arranged in parallel are arranged on an air outlet pipeline of the air preheater 43; the outlet of the first combustion fan 430 is connected to the combustion air inlet of the combustion chamber 30, the outlet of the second combustion fan 431 is connected to the combustion air inlet of the burnout chamber 41, and the combustion air heated by the residual heat is respectively delivered to the combustion chamber 30 and the burnout chamber 41 to be combusted in cooperation with the fuel. Wherein, the burnout chamber 41 is used for removing inflammable and harmful substances contained in the smoke; the waste heat boiler 42 and the air preheater 43 are used for recovering waste heat in flue gas, deoxygenated water is adopted as a heat exchange medium in the waste heat boiler 42, and a boiler ash discharge valve is mounted on an ash discharge port of the waste heat boiler 42 and used for discharging ash; the air inlet duct of the air preheater 43 is connected to a flue gas collection manifold to facilitate the reuse of the flue gas.
Further, a first combustion-supporting fan 35 and a first fuel inlet pipe 36 are connected to the combustion chamber 30; the outlet of the first combustion-supporting fan 35 and the inlet of the circulating pyrolysis gas of the combustion chamber 30 are both located on the body of the combustion chamber 30, and the outlet of the first fuel inlet pipe 36 and the outlet of the first combustion-supporting fan 430 are both connected with the burner of the combustion chamber 30, so that the fuel and the combustion air are firstly mixed and combusted in the burner, and the combustion in the combustion chamber 30 is more sufficient under the action of the first combustion-supporting fan 35 and the circulating pyrolysis gas.
The burnout chamber 41 is also connected with a second combustion-supporting fan 410 and a second fuel inlet pipe 411; the inlet of the second combustion-supporting fan 410 and the inlet of the pyrolysis gas of the burnout chamber 41 are respectively located at two sides of the burnout chamber 41, and the outlets of the second fuel inlet pipe 411 and the second combustion-supporting fan 431 are both connected with the burner of the burnout chamber 41.
In one embodiment, the flue gas treatment system comprises flue gas purification equipment and flue gas discharge equipment which are connected with a flue gas outlet of the air preheater 43, wherein the flue gas purification equipment comprises a semi-dry deacidification tower 45 and a bag-type dust collector 46 which are sequentially connected; an alkali liquor spray gun and an emergency water supply spray gun are arranged on the semi-dry deacidification tower 45; the alkali liquor spray gun is connected with an alkali liquor input pipe and an atomized air pipe, and the atomized air pipe is used for atomizing the alkali liquor in the alkali liquor input pipe so as to fully mix the alkali liquor with the flue gas; the emergency water supply spray gun is connected with a compressed air pipe and a water input pipe, wherein the compressed air pipe is used for pressurizing and atomizing water in the water input pipe and conveying the water to the emergency water supply spray gun. Wherein, a cloth bag ash discharging valve is arranged on the ash discharging port of the cloth bag dust remover 46 and is used for discharging ash.
The flue gas emission equipment include with flue gas draught fan 47 that sack cleaner 46 links to each other and with chimney 48 that flue gas draught fan 47 links to each other, flue gas draught fan 47 be used for with flue gas after the dust removal in sack cleaner 46 is taken out and is sent into carry out high altitude in the chimney 48 and discharge.
The working principle of the oil sludge pyrolysis treatment device is as follows: oil-containing sludge is spirally fed into the pyrolysis kiln 10 through feeding, and the oil sludge is in countercurrent high-temperature direct contact with hot flue gas from the combustion chamber 30 in the pyrolysis kiln 10 for pyrolysis; discharging the dry soil obtained after pyrolysis through a dry soil discharge port, wherein the petroleum mass fraction content in the dry soil after pyrolysis treatment is less than or equal to 0.3%; after most of ash residues of pyrolysis gas are removed by a cyclone separator 21, the pyrolysis gas obtained after pyrolysis is divided into two paths, one path of pyrolysis gas is sent to a combustion chamber 30 through a high-temperature pyrolysis gas circulating fan 22 to be used as fuel for combustion, the other path of pyrolysis gas directly enters a burnout chamber 41 to be subjected to secondary combustion, hot flue gas subjected to secondary combustion enters a waste heat boiler 42 to generate steam for recycling most of heat in the hot flue gas, and the steam can be used for power generation or heating other materials; the hot flue gas from the exhaust-heat boiler 42 is re-introduced into the air preheater 43 for heating the exhaust gas or air from the exhaust gas collecting manifold, thereby recycling the remaining part of the heat; the preheated exhaust gas or combustion air is respectively delivered to the combustion chamber 30 and the burnout chamber 41 through the first combustion fan 430 and the second combustion fan 431 to be mixed with the fuel for combustion; the flue gas from the air preheater 43 passes through a semi-dry deacidification tower 45 to remove acid substances in the flue gas, and then enters a bag-type dust remover 46 for further purification treatment; the purified flue gas is led out to a chimney 48 through a flue gas induced draft fan 47 for high-altitude emission treatment.
Wherein, the circulation volume of the high temperature circulation pyrolysis gas that high temperature pyrolysis gas circulating fan 22 carried is by the pressure drop control of system key point, by combustion chamber 30 promptly, pyrolysis kiln 10, the inner loop that cyclone 21 and high temperature pyrolysis gas circulating fan 22 constitute, constantly take out the gas in pyrolysis kiln 10 through high temperature pyrolysis gas circulating fan 22, make the interior micro-negative pressure that forms of pyrolysis kiln 10, pyrolysis kiln 10 and cyclone 21 have formed the pressure differential promptly, make fatlute carry out the pyrolysis under the relatively lower temperature, prevent that fatlute from appearing phenomenon such as ceramic caking at high temperature pyrolysis or burning time. In one embodiment, the pyrolysis kiln 10 and the cyclone 21 are each provided with a pressure monitor.
The consumption of the combustion air required by the combustion chamber 30 is controlled by the temperature of the flue gas at the outlet of the combustion chamber 30 and the oxygen content of the pyrolysis gas at the outlet of the pyrolysis kiln 10. In one embodiment, a temperature detector is disposed on the flue gas outlet of the combustion chamber 30, and an oxygen content detector is disposed on the pyrolysis gas outlet 13 of the pyrolysis kiln 10.
The hot flue gas outlet temperature and oxygen content of the burnout chamber 41 are controlled by a second combustion fan 410. In one embodiment, a temperature detector and an oxygen content detector are arranged on the hot flue gas outlet of the burnout chamber 41.
The temperature of the flue gas at the outlet of the waste heat boiler 42 is controlled by the operating temperature of the semi-dry deacidification tower 45, and the operating temperature of the semi-dry deacidification tower 45 is controlled by the highest operating temperature which can be borne by the filter bag of the bag-type dust collector 46. In one embodiment, the flue gas outlet of the exhaust-heat boiler 42, the semi-dry deacidification tower 45 and the bag-type dust collector 46 are all provided with temperature detectors.
Optionally, the temperature of the hot flue gas inlet of the pyrolysis kiln 10 is controlled between 600 ℃ and 1100 ℃: the temperature of the hot flue gas outlet of the pyrolysis kiln 10 is controlled between 200 ℃ and 400 ℃. The operating pressure of the pyrolysis kiln 10 is negative pressure operation; the temperature of the dry soil outlet of the pyrolysis kiln 10 is 400-600 ℃. The operation temperature of the burnout chamber 41 is between 800 ℃ and 1200 ℃, and the flue gas outlet temperature of the waste heat boiler 42 is between 200 ℃ and 400 ℃.
The invention also provides an oil sludge pyrolysis treatment process which comprises the following steps:
s1: the oily sludge is sent to a pyrolysis kiln 10 through an oil sludge feeding screw 20; the combustion chamber 30 supplies heat to the pyrolysis kiln 10, the heat supply temperature is 600-1100 ℃, hot smoke generated by combustion in the combustion chamber 30 is in direct countercurrent contact with oil sludge in the pyrolysis kiln 10, and pyrolysis is carried out at 400-800 ℃ under the condition of micro negative pressure (-90 KPa-70 KPa); the dry soil after pyrolysis is discharged from the lower part of the pyrolysis kiln 10; wherein, the oil content of the dry soil after pyrolysis is less than 0.3 percent, and the temperature is 400-600 ℃;
s2: pyrolysis gas generated after oil sludge is pyrolyzed is controlled at the temperature of 200-400 ℃, and is discharged into a cyclone separator 21 through a pyrolysis gas outlet 13 of a pyrolysis kiln 10 for dust removal treatment;
s3: the pyrolysis gas treated by the cyclone separator 21 is divided into two parts; part of the pyrolysis gas is pumped to the combustion chamber 30 by the high-temperature pyrolysis gas circulating fan 22 to be used as fuel for combustion, and the part of the combustion chamber 30 with insufficient combustion is supplied by additional fuel; the other part of the pyrolysis gas enters a burnout chamber 41, and is combusted at 800-1200 ℃ to remove toxic and harmful substances contained in the hot flue gas, so that high-temperature flue gas is obtained;
s4: the high-temperature flue gas enters a waste heat boiler 42 for heat recovery and is used for generating steam, and the steam can be used for power generation or heating;
s5: the high-temperature flue gas from the waste heat boiler 42 is controlled at 200-400 ℃, and then enters the air preheater 43 to continuously recover the heat in the flue gas for heating the combustion air to about 120 ℃; the heated combustion air is divided into two paths, and one path of combustion air is conveyed to the combustion chamber 30 through the first combustion fan 430 and is used for combusting fuel in the combustion chamber 30; the other path of combustion air is conveyed to the burnout chamber 41 through a second combustion fan 431 and is used for burning fuel in the burnout chamber 41;
s6: the flue gas after heat exchange is output to a flue gas treatment system and is discharged after purification treatment. Wherein, the flue gas from the air preheater 43 enters a semi-dry deacidification tower 45, the acid substances in the flue gas are removed by atomized alkaline water to be below the emission standard, and the deacidified flue gas passes through a bag-type dust remover 46 to remove the particulate substances in the flue gas to be below the emission standard; the flue gas treated by the bag-type dust collector 46 is introduced into a chimney 48 by a flue gas induced draft fan 47 and is discharged at high altitude by the chimney 48.
The pyrolysis gas circulation reflux process adopted in the oil sludge pyrolysis treatment process enables the energy consumption of the oil sludge pyrolysis treatment device to be saved by more than 10% compared with the energy consumption of similar oil sludge treatment devices.
The above embodiments are only preferred embodiments of the present invention, and the protection scope of the present invention is not limited thereby, and any insubstantial changes and substitutions made by those skilled in the art based on the present invention are within the protection scope of the present invention.
Various other modifications and changes may be made by those skilled in the art based on the above-described technical solutions and concepts, and all such modifications and changes should fall within the scope of the claims of the present invention.
Claims (10)
1. The oil sludge pyrolysis treatment device is characterized by comprising an oil sludge pyrolysis system, a pyrolysis gas circulation system, a flue gas waste heat recovery system and a flue gas treatment system which are sequentially connected;
the oil sludge pyrolysis system comprises a pyrolysis kiln, an oil sludge feeding screw connected to the pyrolysis kiln and a combustion chamber; the pyrolysis kiln is provided with an oil sludge inlet, a high-temperature gas inlet and a pyrolysis gas outlet; the oil sludge inlet is connected with an outlet of the oil sludge feeding screw, and the high-temperature gas inlet is connected with a hot flue gas outlet of the combustion chamber;
the pyrolysis gas circulating system comprises a cyclone separator connected with the pyrolysis gas outlet and a high-temperature pyrolysis gas circulating fan connected with the outlet of the cyclone separator; the outlet of the high-temperature pyrolysis gas circulating fan is connected with the circulating pyrolysis gas inlet of the combustion chamber;
the flue gas waste heat recovery system comprises a burnout chamber connected with the outlet of the cyclone separator, a waste heat boiler connected with the flue gas outlet of the burnout chamber and an air preheater connected with the flue gas outlet of the waste heat boiler; a first combustion fan and a second combustion fan which are arranged in parallel are installed on an air outlet pipeline of the air preheater; the outlet of the first combustion fan is connected with the combustion air inlet of the combustion chamber, and the outlet of the second combustion fan is connected with the combustion air inlet of the burnout chamber;
the flue gas treatment system comprises flue gas purification equipment and flue gas emission equipment which are connected with a flue gas outlet of the air preheater.
2. The sludge pyrolysis treatment apparatus of claim 1 wherein the sludge inlet is located at an end of the pyrolysis kiln proximate to the pyrolysis gas outlet and the hot gas inlet is located at an end of the pyrolysis kiln distal to the pyrolysis gas outlet.
3. The oil sludge pyrolysis treatment device of claim 1, wherein the combustion chamber is further connected with a first combustion fan and a first fuel inlet pipe; the inlet of the circulating pyrolysis gas and the outlet of the first combustion-supporting fan are both positioned on the body of the combustion chamber, and the outlet of the first fuel inlet pipe and the outlet of the first combustion-supporting fan are both connected with the combustor of the combustion chamber.
4. The oil sludge pyrolysis treatment device of claim 1, wherein a second combustion-supporting fan and a second fuel inlet pipe are further connected to the burnout chamber; the inlet of the second combustion-supporting fan and the inlet of the pyrolysis gas of the burnout chamber are respectively positioned at two sides of the burnout chamber, and the outlet of the second fuel inlet pipe and the outlet of the second combustion-supporting fan are both connected with the burner of the burnout chamber.
5. The oil sludge pyrolysis treatment device according to claim 1, wherein a boiler ash discharge valve is mounted on an ash discharge port of the waste heat boiler; and a dry soil discharge hole is formed at one end of the pyrolysis kiln close to the combustion chamber.
6. The oil sludge pyrolysis treatment device according to claim 1, wherein the flue gas purification equipment comprises a semi-dry deacidification tower and a bag-type dust remover which are connected in sequence; an alkali liquor spray gun and an emergency water supply spray gun are arranged on the semi-dry deacidification tower; the alkali liquor spray gun is connected with an alkali liquor input pipe and an atomized air pipe, and the atomized air pipe is used for atomizing alkali liquor in the alkali liquor input pipe; the emergency water supply spray gun is connected with a compressed air pipe and a water input pipe, wherein the compressed air pipe is used for pressurizing and atomizing water in the water input pipe and conveying the water to the emergency water supply spray gun.
7. The oil sludge pyrolysis treatment device according to claim 6, wherein a cloth bag ash discharge valve is mounted on an ash discharge port of the cloth bag dust remover.
8. The oil sludge pyrolysis treatment device according to claim 6, wherein the flue gas emission equipment is connected with the bag-type dust remover, the flue gas emission equipment comprises a flue gas induced draft fan and a chimney connected with the flue gas induced draft fan, and the induced draft fan is used for extracting flue gas subjected to dust removal in the bag-type dust remover and sending the flue gas into the chimney for high-altitude emission.
9. The oil sludge pyrolysis treatment process is characterized by comprising the following steps:
s1: oil-containing sludge is spirally fed to a pyrolysis kiln through oil sludge feeding; the combustion chamber supplies heat to the pyrolysis kiln, and hot flue gas generated by combustion in the combustion chamber is pyrolyzed with oil sludge in the pyrolysis kiln in a mode of countercurrent direct contact; discharging the dry soil after pyrolysis from the lower part of the pyrolysis kiln;
s2: pyrolysis gas generated after oil sludge is pyrolyzed is discharged into a cyclone separator through a pyrolysis gas outlet of a pyrolysis kiln, and dust removal treatment is carried out;
s3: the pyrolysis gas treated by the cyclone separator is divided into two parts; part of the pyrolysis gas is pumped to a combustion chamber by a high-temperature pyrolysis gas circulating fan to be used as fuel for combustion; the other part of the pyrolysis gas enters a burnout chamber for burning to obtain high-temperature flue gas;
s4: the high-temperature flue gas enters a waste heat boiler for heat recovery and is used for generating steam;
s5: high-temperature flue gas from the waste heat boiler enters an air preheater, and heat in the flue gas is continuously recovered for heating combustion air; the heated combustion air is divided into two paths, and one path of combustion air is conveyed to the combustion chamber through a first combustion fan; the other path of combustion air is conveyed to the burnout chamber through a second combustion fan;
s6: the flue gas after heat exchange is output to a flue gas treatment system and is discharged after purification treatment.
10. The oil sludge pyrolysis treatment process as claimed in claim 9, wherein in step S1, the temperature of the hot flue gas inlet of the pyrolysis kiln is controlled at 600-1100 ℃, the temperature of the pyrolysis gas outlet of the pyrolysis kiln is controlled at 200-400 ℃, and the operating pressure of the pyrolysis kiln is negative pressure; in step S3, the operation temperature of the burnout chamber is controlled to be 800-1200 ℃; in step S4, the flue gas outlet temperature of the exhaust-heat boiler is controlled to 200 to 400 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010878650.1A CN112062435B (en) | 2020-08-27 | 2020-08-27 | Oil sludge pyrolysis treatment device and process thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010878650.1A CN112062435B (en) | 2020-08-27 | 2020-08-27 | Oil sludge pyrolysis treatment device and process thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112062435A true CN112062435A (en) | 2020-12-11 |
| CN112062435B CN112062435B (en) | 2023-10-10 |
Family
ID=73659605
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010878650.1A Active CN112062435B (en) | 2020-08-27 | 2020-08-27 | Oil sludge pyrolysis treatment device and process thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112062435B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113636730A (en) * | 2021-08-26 | 2021-11-12 | 宜兴市智博环境设备有限公司 | Oil sludge pyrolysis treatment system |
| CN114031254A (en) * | 2021-10-13 | 2022-02-11 | 南方环境有限公司 | Pyrolysis waste material processing preliminary treatment discharging system |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102174331A (en) * | 2011-04-01 | 2011-09-07 | 浙江大学 | Integrated method and system for reclaiming fuel oil by pyrolyzing sludge |
| CN106746470A (en) * | 2017-02-09 | 2017-05-31 | 中国石油大学(华东) | A kind of oily sludge drying and incinerating integrated processing technique |
| CN109628150A (en) * | 2019-01-28 | 2019-04-16 | 大连科林能源工程技术开发有限公司 | A kind of greasy filth recirculating fluidized bed environment-friendly and energy-efficient recycling treatment system |
| CN109987813A (en) * | 2019-05-10 | 2019-07-09 | 马平 | Oily sludge pyrolysis treatment systems |
| US20200207653A1 (en) * | 2018-12-28 | 2020-07-02 | Hubei Green Development Technology Co., Ltd. | System for urban organic solid waste pyrolysis-gasification coupled with drying |
-
2020
- 2020-08-27 CN CN202010878650.1A patent/CN112062435B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102174331A (en) * | 2011-04-01 | 2011-09-07 | 浙江大学 | Integrated method and system for reclaiming fuel oil by pyrolyzing sludge |
| CN106746470A (en) * | 2017-02-09 | 2017-05-31 | 中国石油大学(华东) | A kind of oily sludge drying and incinerating integrated processing technique |
| US20200207653A1 (en) * | 2018-12-28 | 2020-07-02 | Hubei Green Development Technology Co., Ltd. | System for urban organic solid waste pyrolysis-gasification coupled with drying |
| CN109628150A (en) * | 2019-01-28 | 2019-04-16 | 大连科林能源工程技术开发有限公司 | A kind of greasy filth recirculating fluidized bed environment-friendly and energy-efficient recycling treatment system |
| CN109987813A (en) * | 2019-05-10 | 2019-07-09 | 马平 | Oily sludge pyrolysis treatment systems |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113636730A (en) * | 2021-08-26 | 2021-11-12 | 宜兴市智博环境设备有限公司 | Oil sludge pyrolysis treatment system |
| CN114031254A (en) * | 2021-10-13 | 2022-02-11 | 南方环境有限公司 | Pyrolysis waste material processing preliminary treatment discharging system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112062435B (en) | 2023-10-10 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109351754A (en) | A kind of method and solid waste treatment system of solid waste processing | |
| CN104876414A (en) | Method and device for pyrolytic carbonizing treatment of sludge | |
| CN109945211B (en) | Burning treatment method and system for semi-coke pyrolysis waste gas and waste liquid | |
| CN112062435B (en) | Oil sludge pyrolysis treatment device and process thereof | |
| CN110805906A (en) | Sludge and garbage drying carbonization pyrolysis combustion treatment system and method | |
| CN211419939U (en) | Oily sludge treatment device | |
| CN112111302A (en) | Low-order material gasification combustion and flue gas pollutant control integrated process and device and application | |
| CN102317687A (en) | Be used to handle the method and apparatus of solid waste | |
| JP3957737B1 (en) | Combustion system for flame-retardant high-viscosity waste such as PCB | |
| CN209550214U (en) | A kind of solid waste treatment system | |
| CN102031128A (en) | Coal gas-tar-semicoke cogeneration method | |
| CN103894412B (en) | A kind of soil remediation method for upgrading | |
| CN113234490A (en) | Gasification-based sludge comprehensive utilization system and treatment method | |
| CN210764947U (en) | Sludge drying, carbonizing and gasifying system | |
| CN111895424A (en) | Garbage disposal and generator set coupling power generation system | |
| KR100744813B1 (en) | Burner apparatus for harmful substance of waste carbonize system | |
| CN212770389U (en) | Oil sludge pyrolysis treatment device | |
| CN111059549A (en) | Hazardous waste incineration treatment system and process thereof | |
| CN211060139U (en) | Pressurized fluidized bed oily sludge incineration system | |
| CN202813394U (en) | Saline organic wastewater immersion-type combustion quenching processing device | |
| CN213746746U (en) | Harmless treatment equipment for hazardous waste | |
| CN210718694U (en) | Hazardous waste workshop waste gas cooperative disposal system | |
| CN210891659U (en) | Dry pyrolysis incineration power generation system for municipal solid waste | |
| CN211119367U (en) | Comprehensive treatment system for treating waste by using waste for domestic garbage and sludge | |
| CN112779057A (en) | Comprehensive oil sludge treatment system and comprehensive oil sludge treatment method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |