CN108640458A - Greasy filth innoxious thermal desorption processing system and processing method - Google Patents
Greasy filth innoxious thermal desorption processing system and processing method Download PDFInfo
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- CN108640458A CN108640458A CN201810582895.2A CN201810582895A CN108640458A CN 108640458 A CN108640458 A CN 108640458A CN 201810582895 A CN201810582895 A CN 201810582895A CN 108640458 A CN108640458 A CN 108640458A
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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
- C02F11/14—Treatment of sludge; Devices therefor by de-watering, drying or thickening with addition of chemical agents
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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
- C02F11/10—Treatment of sludge; Devices therefor by pyrolysis
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- 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
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- Environmental & Geological Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
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- General Chemical & Material Sciences (AREA)
- Treatment Of Sludge (AREA)
Abstract
The invention discloses a kind of thermal desorption processing systems and processing method that greasy filth is innoxious, the processing system includes greasy filth pretreatment system, feed system, thermal desorption system, high-temperature burning system, exhaust treatment system and discharge system, and the discharge port of greasy filth pretreatment system is connected with the feed end of feed system；The discharge end of feed system is connected with the feed inlet of thermal desorption system, the exhanst gas outlet of thermal desorption system is connected with the air inlet of high temperature combustors, the discharge port of thermal desorption system is connected with discharge system, the offgas outlet of high temperature combustors connects exhaust treatment system, and tail gas is after processing is up to standard by smoke stack emission to air.The present invention has good control in thermal desorption to temperature, realizes energy-saving consumption-reducing；Chain-plate type crawler belt is used in the indoor transport of thermal desorption, greasy filth stirring at high operating temperatures is avoided, extends the service life of refractory material, while effectively reducing the generation of dust amount in tail gas, mitigate the formation of secondary pollution.
Description
Technical field
The present invention relates to greasy filth, technical field of soil remediation containing oil, at the innoxious thermal desorption of specifically a kind of greasy filth
Reason system and processing method.
Background technology
As a kind of chemical energy source, oil inevitably results from big during exploitation, transport, storage, processing etc.
Waste residue, waste water and the exhaust gas of amount bring huge potential threat to social environment and human security.The especially pollution of greasy filth,
Due to its unique property and huge quantity, a large amount of soils are not only occupied, the value that efficiently uses in soil is made to reduce, and
Since intractability is big, processing time is long, threatens to the health of human lives, increases difficulty, to warp to the processing of environment
The development of Ji causes obstacle.The mixture that greasy filth refers to oil to be formed with soil or other impurity contains oil, hydro carbons and non-
Hydrocarbons pollutant, wherein hydrocarbon component include alkane, cycloalkane and aromatic hydrocarbon；Non-hydrocarbons component includes aphthenic acids, phenol, heterocyclic nitrogen
With sulfide etc., great difficulty is brought to the improvement of greasy filth.
It carries out harmless treatment for greasy filth at present to focus mostly in microbiological treatment, but the petroleum hydrocarbon that microorganism can be handled is dense
Degree is too low, and long processing period, efficiency are low, it is more difficult to promote in practice.Thermal desorption treatment process is because its is simple for process, processing
Efficient, the advantages that process cycle is short, has been more and more widely used in organic polluted soil processing.But it is presently available for
The thermal desorption system of oil-sludge treatment is also less, and to there is desorption efficiency low for rotary kiln thermal desorption processes, and Dust Capacity is big, refractory material
The shortcomings of being easily lost.
Invention content
Technical problem to be solved by the invention is to provide a kind of thermal desorption processing system that greasy filth is innoxious and processing sides
Method quickly and efficiently can carry out harmless treatment to greasy filth, solve that current thermal desorption system treatment effeciency is low, Dust Capacity is big etc. and ask
Topic.
The present invention solves above-mentioned technical problem with following technical solution：
The innoxious thermal desorption processing system of greasy filth of the present invention, it includes greasy filth pretreatment system, feed system, thermal desorption
System, high-temperature burning system, exhaust treatment system and discharge system, the greasy filth pretreatment system are made of the quenched slot of sludge,
The discharge port of the quenched slot of sludge is connected with the feed end of feed system；The discharge end of feed system and the charging of thermal desorption system
Mouthful be connected, the exhanst gas outlet of thermal desorption system is connected with the air inlet of high temperature combustors, the discharge port of thermal desorption system with
Discharge system is connected, and the offgas outlet of high temperature combustors connects exhaust treatment system, and tail gas passes through chimney after processing is up to standard
It is discharged into air.
The feed system is made of charging feed bin 21, Shaftless screw conveyor 2 and batch meter 3, and charging feed bin 21 is installed
In the input end of Shaftless screw conveyor 2, batch meter 3 is mounted on the outlet end of Shaftless screw conveyor 2.
The thermal desorption system is by the board-like conveyer belt 42 of STAINLESS STEEL CHAINS, a series of burners 46 and the heat for being coated with refractory material
Desorption chamber 4 is constituted, and the board-like conveyer belt 42 of STAINLESS STEEL CHAINS is mounted in thermal desorption room 4, and Stainless Steel Chain Board is driven by driving roller bearing 41
Formula conveyer belt 42 is continuously run, and driving roller bearing 41 provides power source by the first hydraulic fluid tank 43 and the second hydraulic fluid tank 44, a series of
Burner 46 is mounted on 4 top of thermal desorption room, and a series of burners 46 are made of the burner of independent temperature control, by the way that temperature is arranged
Gradient makes to form different temperature regions in thermal desorption room 4, and the top of thermal desorption room 4 is equipped with exhanst gas outlet 45, thermal desorption room 4
Bottom is equipped with dregs discharge port 47.
The discharge system is made of discharging feed bin 10, discharging spiral conveyor 11 and discharging warehouse 12, and discharge spiral transferring
It send and is wrapped in recirculated cooling water around machine, discharging warehouse is hermetic type warehouse, and is equipped with sprinkling equipment at the top of discharging warehouse and drops
Warm dedusting.
The high-temperature burning system is by high temperature combustors 5, First air entrance 51, Secondary Air entrance 52, air inlet 53, high temperature
Burner 54, offgas outlet 55 and emergency vent 56 form, and high temperature combustors 5 are horizontally mounted and are around coated with indoors resistance to
Fiery material, high-temperature burner 54, First air entrance 51, Secondary Air entrance 52 and air inlet 53 are mounted on the one of high temperature combustors 5
End, the other end setting offgas outlet 55 and emergency vent 56 of high temperature combustors 5, air inlet 53 connect the cigarette of thermal desorption system
Gas exports.
The exhaust treatment system is by the cooling down tower 6, shaped Venturi dedusting system 7, air-introduced machine 9, the chimney 8 that connect successively
Composition, the top of cooling down tower 6 connect with the offgas outlet of high-temperature burning system, and the water inlet end of cooling down tower 6 passes through drop
Warm spray pump 18 is connected with clean water tank 14, water outlet and the buck baffle-box 15 of cooling down tower 6 and shaped Venturi dedusting system 7
Connect, buck baffle-box 15 connects through buck elevator pump 13 with the water inlet end of inclined-plate clarifying basin 16, the water outlet of inclined-plate clarifying basin 16
End connects with return water intermediate box 17, and the water outlet of return water intermediate box 17 is with the water inlet end of shaped Venturi dedusting system 7 and discharging
The sprinkling equipment of system connects.
The innoxious thermal desorption processing method of greasy filth of the present invention, including following processing step：
(1) quantitative continuous conveying greasy filth：Pretreated greasy filth is continuously and uniformly sent to batch meter, by adjusting material
Transmission speed control the follow-up treating capacity for entering thermal desorption room；
(2) greasy filth is sent into thermal desorption system processing：The thermal desorption room temperature that thermal desorption system uses for 200~800 DEG C,
Residence time is 10~60min；The board-like conveyer belt of STAINLESS STEEL CHAINS is equipped in thermal desorption room, it will by the board-like conveyer belt of STAINLESS STEEL CHAINS
A series of lower section of the greasy filth at the uniform velocity continuously across burners, the burner of use are uniformly distributed, and the independent temperature control of energy, pass through control
Burner makes to form basic, normal, high different temperature region in thermal desorption room；Thermal desorption room acts on forming tiny structure by exhaust fan
State makes the organic pollution in greasy filth be desorbed out in anoxic condition of negative pressure, avoids escaping for pollutant；
(3) will through thermal desorption system, treated that dregs is transported to discharging feed bin using screw conveyor, while spraying drop
Discharging warehouse is deposited in after temperature, and timing is transported outward；The flue gas that thermal desorption system processing generates is sent into high-temperature burning system, high temperature
The high-temp combustion room temperature that combustion system uses is maintained at 900~1200 DEG C, and gas residence time is 1~2s, and pollutant is filling
It thoroughly burns under sufficient excess air, becomes carbon dioxide and water vapour, it is net that combustion tail gas enters exhaust treatment system cooling dedusting
Change it is up to standard after by smoke stack emission to air.
Before step (1) quantitatively conveys greasy filth, modifier treatment first is carried out to greasy filth, greasy filth is sent into the quenched slot of sludge
In, the moisture content of greasy filth, dispersibility are adjusted by adding medicament, so that the grain diameter of greasy filth is less than 30mm, moisture content is less than
25%.
Step (3), the exhaust treatment system is by the cooling down tower 6, shaped Venturi dedusting system 7, the air inducing that connect successively
Machine 9 and chimney 8 are constituted, and exhaust treatment system connects with water circulation system, and water circulation system includes clean water tank 14, buck baffle-box
15, inclined-plate clarifying basin 16 and return water intermediate box 17, the water inlet end phase that clean water tank 14 passes through cool down spray pump 18 and cooling down tower 6
It connects, the water outlet of cooling down tower 6 and the water outlet of shaped Venturi dedusting system 7 connect with buck baffle-box 15, buck buffering
Case 15 connects through buck elevator pump 13 with the water inlet end of inclined-plate clarifying basin 16, water outlet and the return water intermediate box of inclined-plate clarifying basin 16
17 connect, the sprinkling equipment phase of the water outlet of return water intermediate box 17 and the water inlet end of shaped Venturi dedusting system 7 and the feed bin that discharges
It connects.
Compared with prior art, the present invention has the following advantages：
(1) the thermal desorption room of thermal desorption system of the invention is heated by the way of Multi-point combustion, by thermal desorption room
It is divided into basic, normal, high temperature region, realizes the good control to temperature, it is more more energy efficient than common thermal desorption technology.
(2) greasy filth is carried out in the indoor transport of thermal desorption using the board-like conveyer belt of STAINLESS STEEL CHAINS, can avoid greasy filth with it is resistance to
The friction of fiery material, extends the service life of refractory material, while avoiding greasy filth stirring at high operating temperatures, effectively reduces in tail gas
The generation of dust amount mitigates the formation of secondary pollution.
(3) present invention realizes that the thermal desorption that continuous operation is carried out to greasy filth is handled, and solves traditional greasy filth thermal desorption efficiency
Low, the problems such as energy consumption is big, dust is more, by thermal desorption system, treated that dregs oil content is less than 0.3%, and organic pollution is gone
Except rate is up to 99.99%, thermal desorption tail gas is less than 0.1TEQng/Nm3 through high-temp combustion purifying smoke Zhong content of dioxin, through tail gas
Each index reaches after processing system processing《Discharge standard of air pollutants》Discharge standard.
(4) processing system of the present invention is widely portable to various oil-based drill cuttings, ground sludge, clear tank greasy filth, tank bottom oil sludge
Equal oily sludges object processing.
Description of the drawings
Fig. 1 is the innoxious thermal desorption processing technological flow figure of greasy filth of the present invention.
Fig. 2 is the innoxious thermal desorption processing system structural schematic diagram of greasy filth of the present invention.
In figure：The quenched slot 1 of sludge, Shaftless screw conveyor 2 feed feed bin 21, batch meter 3, thermal desorption room 4, driving rolling
Axis 41, the board-like conveyer belt 42 of STAINLESS STEEL CHAINS, the first hydraulic fluid tank 43, the second hydraulic fluid tank 44, exhanst gas outlet 45, burner 46, dregs
Discharge port 47, high temperature combustors 5, First air entrance 51, Secondary Air entrance 52, air inlet 53, high-temperature burner 54, offgas outlet
55, emergency vent 56, cooling down tower 6, diffusing air-hole 61, ash water tank 62, atomization sprayer 63, shaped Venturi dedusting system
7, venturi scrubber 71, spray column 72, sedimentation tower 73, spray head 74, chimney 8, air-introduced machine 9, discharge feed bin 10, and discharge spiral
Conveyer 11, discharge warehouse 12, buck elevator pump 13, clean water tank 14, buck baffle-box 15, inclined-plate clarifying basin 16, among return water
Case 17, cool down spray pump 18.
Specific implementation mode
Technical scheme of the present invention is further described below in conjunction with the accompanying drawings.
As shown in Figure 1, the thermal desorption processing method that greasy filth of the present invention is innoxious, including following processing step：
(1) greasy filth modifier treatment：By greasy filth be sent into the quenched slot of sludge in, by add medicament adjust greasy filth moisture content,
Dispersibility, makes the grain diameter of greasy filth be less than 30mm, and moisture content is less than 25%；
(2) quantitative continuous conveying greasy filth：Pretreated greasy filth is continuously and uniformly sent to batch meter, by adjusting material
Transmission speed control the follow-up treating capacity for entering thermal desorption room；
(3) greasy filth is sent into thermal desorption system and carries out thermal desorption processing：Thermal desorption system setting thermal desorption room temperature be
300~800 DEG C, the residence time is 10~60min；It is equipped with the board-like conveyer belt of STAINLESS STEEL CHAINS in thermal desorption room, passes through STAINLESS STEEL CHAINS
A series of lower section of the board-like conveyer belt by greasy filth at the uniform velocity continuously across burners, the burner of use are uniformly distributed, and can be independent
Temperature control makes to form basic, normal, high different temperature region in thermal desorption room by controlling burner；Thermal desorption room passes through exhaust fan
Effect forms micro-vacuum state, and the organic pollution in greasy filth is made to be desorbed out in anoxic condition of negative pressure, avoids the outer of pollutant
Ease；
(4) will through thermal desorption system, treated that dregs is transported to discharging feed bin using screw conveyor, while spraying drop
Discharging warehouse is deposited in after temperature, and timing is transported outward；The flue gas that thermal desorption system processing generates is sent into high-temperature burning system, high temperature
The high-temp combustion room temperature that combustion system uses is maintained at 900~1300 DEG C, and gas residence time is 1~2s, and pollutant is filling
It thoroughly burns under sufficient excess air, becomes carbon dioxide and water vapour, it is net that combustion tail gas enters exhaust treatment system cooling dedusting
Change it is up to standard after by smoke stack emission to air.
Preferably, the processing system structure that the innoxious thermal desorption processing method of greasy filth of the present invention uses is as shown in Figure 2：
The innoxious thermal desorption processing system of greasy filth of the present invention includes greasy filth pretreatment system, feed system, thermal desorption system
System, high-temperature burning system, exhaust treatment system and discharge system.The greasy filth pretreatment system is made of the quenched slot of sludge 1, dirty
The discharge port of the quenched slot of mud 1 is connected with the feed end of feed system；The discharge end of feed system and the charging of thermal desorption system
Mouthful be connected, the exhanst gas outlet of thermal desorption system is connected with the air inlet of high temperature combustors 5, the discharge port of thermal desorption system and
Discharge system is connected, and the offgas outlet of high temperature combustors connects exhaust treatment system, and tail gas passes through chimney after processing is up to standard
It is discharged into air.
The feed system is made of charging feed bin 21, Shaftless screw conveyor 2 and batch meter 3, and charging feed bin 21 is installed
In the input end of Shaftless screw conveyor 2, batch meter 3 is mounted on the outlet end of Shaftless screw conveyor 2, Shaftless screw conveyor
2 inclined upward arrangements installations, the discharge end for feeding the quenched slot of the feed end of feed bin 21 and sludge 1 connect.
The thermal desorption system is by the board-like conveyer belt 42 of STAINLESS STEEL CHAINS, a series of burners 46 and the heat for being coated with refractory material
Desorption chamber 4 is constituted, and the board-like conveyer belt 42 of STAINLESS STEEL CHAINS is mounted in thermal desorption room 4, and Stainless Steel Chain Board is driven by driving roller bearing 41
Formula conveyer belt 42 makees continuous uniform operating, and driving roller bearing 41 is by the first hydraulic fluid tank 43 and second mounted on 4 bottom of thermal desorption room
Hydraulic fluid tank 44 provides power source, and a series of burners 46 are mounted on 4 top of thermal desorption room, and a series of burners 46 are by independent temperature control
Burner composition, make to form basic, normal, high different temperature region, thermal desorption room in thermal desorption room 4 by the way that temperature gradient is arranged
4 top is equipped with exhanst gas outlet 45, and the discharge end of thermal desorption room 4 is equipped with dregs discharge port 47.
The discharge system is made of discharging feed bin 10, discharging spiral conveyor 11 and discharging warehouse 12, and discharge spiral transferring
It sending and is wrapped in recirculated cooling water around machine, discharging feed bin 10 connects with dregs discharge port 47, and discharging warehouse 12 is hermetic type warehouse,
And it is equipped with sprinkling equipment cooling dedusting at 12 top of discharging warehouse.
The high-temperature burning system is by high temperature combustors 5, First air entrance 51, Secondary Air entrance 52, air inlet 53, high temperature
Burner 54, offgas outlet 55 and emergency vent 56 form, and high temperature combustors 5 are horizontally mounted and are around coated with indoors resistance to
Fiery material, high-temperature burner 54, First air entrance 51, Secondary Air entrance 52 and air inlet 53 are mounted on the one of high temperature combustors 5
End, the other end setting offgas outlet 55 and emergency vent 56 of high temperature combustors 5, air inlet 53 connect the cigarette of thermal desorption system
Gas outlet 45.
The exhaust treatment system is by the cooling down tower 6, shaped Venturi dedusting system 7, air-introduced machine 9, the chimney 8 that connect successively
Composition, the top of cooling down tower 6 connect with the offgas outlet 55 of high-temperature burning system, and the water inlet end of cooling down tower 6 is equipped with
The water inlet end of diffusing air-hole 61 and atomization sprayer 63, atomization sprayer 63 passes through spray pump 18 and 14 phase of clean water tank of cooling down
The bottom water outlet of connection, cooling down tower 6 is equipped with ash water tank 62；Shaped Venturi dedusting system 7 includes venturi scrubber 71, spray
Drench tower 72 and sedimentation tower 73, be equipped in spray column 72 spray head 74, the water outlet of shaped Venturi dedusting system 7 and ash water tank 62 with
Buck baffle-box 15 connects, and buck baffle-box 15 connects through buck elevator pump 13 with the water inlet end of inclined-plate clarifying basin 16, and inclined plate is heavy
The water outlet in shallow lake pond 16 connects with return water intermediate box 17, the water inlet of the water outlet and shaped Venturi dedusting system 7 of return water intermediate box 17
The sprinkling equipment of end and discharge system connects.
The course of work of present system is as follows：
Greasy filth is placed in the quenched slot of sludge 1, the work of pretreatment system is determined according to the practical oil content of greasy filth, water content
Skill, when greasy filth moisture content is higher, oil content is not high, can add the medicaments such as dispersant or drier adjust greasy filth moisture content,
Dispersibility reduces the toughness of greasy filth.
Pretreated greasy filth will be passed through by feeding feed bin 21 to enter inside Shaftless screw conveyor 2, shaftless screw conveying
Machine can mitigate adhesiveness of the greasy filth in equipment, mitigate the load of equipment；Under the action of Shaftless screw conveyor, greasy filth is fallen into
In batch meter 3 at 4 feed inlet of thermal desorption room, and the treating capacity into thermal desorption room is controlled by batch meter 3；In batch meter 3
Equipped with double-shaft spiral conveyer, entrance has small to big, and the continuous feed of greasy filth plays the role of thermal desorption room to lock gas, avoids outer
The air in face enters in thermal desorption room.
The greasy filth on stainless steel band chain-plate type conveyer belt 42 in thermal desorption room 4 is fallen, it is even under the rotation of driving roller bearing 41
Speed is advanced from the feed inlet of thermal desorption room to discharge port direction, during which passes through being formed by a series of burner 46 of independent temperature controls
Basic, normal, high different temperature region makes the control of thermal desorption room temperature at 300~800 DEG C.Greasy filth from low temperature to high-temperature region slowly
Advance, so that the low-boiling pollutant desorption that takes the lead in is come out, desorption comes out after high boiling pollutant, has not only saved fuel, but also protects
The abundant desorption time of pollutant is demonstrate,proved.The pollutant flue gas that thermal desorption comes out is under the action of exhaust fan, before being heated with greasy filth
Into direction on the contrary, hot-air is reversely contacted with soil, being sufficiently mixed for hot-air and contaminated soil can be realized, improve thermal desorption effect
Rate, while the transmission mode of the board-like conveyer belt of STAINLESS STEEL CHAINS 42 avoid greasy filth stirring at high operating temperatures, effectively reduce cigarette
The generation of dust quantity is efficiently removed conducive to the pollutant in tail gas, mitigates the formation of secondary pollution.
The flue gas that thermal desorption comes out enters high temperature combustion under the action of exhaust fan, from the exhanst gas outlet 45 of thermal desorption room 4
The temperature of the air inlet 53 of burning system, high temperature combustors 5 is maintained between 900~1300 DEG C, and flue gas stops high temperature combustors 5
It is 1~2s to stay the time, and the pollutants such as petroleum hydrocarbon fully burn in high temperature combustors 5 under excessive air conditions, are converted into
Carbon dioxide and vapor finally enter exhaust treatment system from the offgas outlet of high temperature combustors 55.
The exhaust temperature come out from high-temperature burning system is higher, carries a small amount of dust secretly, needing to be further processed could arrange
It puts.Tail gas is entered from 6 top of cooling down tower in tower, and cooling spray pump 18, which is pumped clean water to atomization by clean water tank 14, to be sprayed
Device 63 is drenched, clean water is atomized by atomization sprayer 63, high-temperature tail gas is dropped to 200 DEG C hereinafter, avoiding in 1~2s
The formation of bioxin.Period has in a small amount of dust and wet-laid to ash water tank 62, and collects into buck baffle-box 15.
Tail gas after cooling enter venturi dust settler 71 carry out rough dusting, enter back into spray column 72 carry out it is secondary
Dedusting reduces the load of spray column.When containing sour gas in tail gas, the water of spray column 72 can be changed into the alkalinity such as lime
Liquid further neutralizes sour gas.By the tail gas of final dusting using 73 dedusting of sedimentation tower with vortex function, most
Tail gas after end is up to standard pumps to 8 China and foreign countries of chimney by air-introduced machine 9 and is discharged in air.
The buck that venturi scrubber 71 and spray column 72 generate is collected into buck baffle-box 15, and buck is using inclined plate
The precipitation of sedimentation basin 16, the clear liquid in upper layer enter return water intermediate box 17 and are recycled, sedimentation basin bottom
Sludge carries out outer row.
It is the application example of the present invention below：
Example one：
It is to deal with objects with the oil-based drill cuttings in certain oil field, moisture content 17%, oil content 12%, particle relatively dispersion,
Average particle size is less than 10mm, enters charging feed bin after preprocessed system processing, and control is conveyed by the double-shaft spiral of batch meter
System is into the treating capacity of thermal desorption room, and thickness of the greasy filth in Stainless Steel Chain Board is 10 centimetres, and control greasy filth is in thermal desorption room
Temperature range is 200~500 DEG C, residence time 20min, and the temperature control of high temperature combustors stops 1.5s at 1000 DEG C.Heat
Dregs oil content after desorption is 180mg/kg, and removal rate is up to 99.85%, and thermal desorption tail gas is through in high-temp combustion purifying smoke two
Evil English contents are less than 0.1TEQng/Nm3, and each index reaches after exhaust treatment system is handled《Atmosphere pollution comprehensive discharge mark
It is accurate》Discharge standard.
Example two：
With the ground sludge in certain oil field be process object, moisture content 20%, oil content 13%, particle a little glue
It is thick.Enter charging feed bin after preprocessed system processing, is controlled into thermal desorption room by the double-shaft spiral conveying of batch meter
Reason amount, thickness of the greasy filth in Stainless Steel Chain Board are 8 centimetres, and temperature range of the control greasy filth in thermal desorption room is 200~600
DEG C, the temperature control of residence time 35min, high temperature combustors stop 1.5s at 1000 DEG C.Dregs oil content after thermal desorption
For 200mg/kg, up to 99.85%, thermal desorption tail gas is less than removal rate through high-temp combustion purifying smoke Zhong content of dioxin
0.1TEQng/Nm3, each index reaches after exhaust treatment system is handled《Discharge standard of air pollutants》Discharge mark
It is accurate.
Example three：
It is process object with the tank bottom oil sludge in certain oil field, moisture content 35%, oil content 18%, particle is more sticky,
Migration is low.Enter charging feed bin after preprocessed system processing reduction water content is quenched, is conveyed by the double-shaft spiral of batch meter
Control is into the treating capacity of thermal desorption room, and thickness of the greasy filth in Stainless Steel Chain Board is 5 centimetres, and control greasy filth is in thermal desorption room
Temperature range is 200~700 DEG C, residence time 30min, and the temperature control of high temperature combustors stops 2s at 900 DEG C.Thermal desorption
Dregs oil content afterwards is 300mg/kg, and removal rate is up to 99.83%, and thermal desorption tail gas is through high-temp combustion purifying smoke Zhong bioxin
Content is less than 0.1TEQng/Nm3, and each index reaches after exhaust treatment system is handled《Discharge standard of air pollutants》's
Discharge standard.
Claims (9)
1. the innoxious thermal desorption processing system of greasy filth, which is characterized in that it includes greasy filth pretreatment system, feed system, heat
Desorption system, high-temperature burning system, exhaust treatment system and discharge system, the greasy filth pretreatment system is by the quenched slot group of sludge
At the discharge port of the quenched slot of sludge is connected with the feed end of feed system；The discharge end of feed system and thermal desorption system
Feed inlet is connected, and the exhanst gas outlet of thermal desorption system is connected with the air inlet of high temperature combustors, the discharging of thermal desorption system
Mouth is connected with discharge system, and the offgas outlet of high temperature combustors connects exhaust treatment system, and tail gas passes through after processing is up to standard
In smoke stack emission to air.
2. the innoxious thermal desorption processing system of greasy filth according to claim 1, which is characterized in that the feed system by into
Expect that feed bin 21, Shaftless screw conveyor 2 and batch meter 3 are constituted, charging feed bin 21 is mounted on the import of Shaftless screw conveyor 2
End, batch meter 3 are mounted on the outlet end of Shaftless screw conveyor 2.
3. the innoxious thermal desorption processing system of greasy filth according to claim 1, which is characterized in that the thermal desorption system by
The board-like conveyer belt 42 of STAINLESS STEEL CHAINS, a series of burners 46 and the composition of thermal desorption room 4 for being coated with refractory material, STAINLESS STEEL CHAINS are board-like
Conveyer belt 42 is mounted in thermal desorption room 4, drives the board-like conveyer belt of STAINLESS STEEL CHAINS 42 to continuously run by driving roller bearing 41, driving
Roller bearing 41 provides power source by the first hydraulic fluid tank 43 and the second hydraulic fluid tank 44, and a series of burners 46 are pushed up mounted on thermal desorption room 4
Portion, a series of burners 46 are made of the burner of independent temperature control, make to form difference in thermal desorption room 4 by the way that temperature gradient is arranged
Temperature region, the top of thermal desorption room 4 is equipped with exhanst gas outlet 45, and the bottom of thermal desorption room 4 is equipped with dregs discharge port 47.
4. the innoxious thermal desorption processing system of greasy filth according to claim 1, which is characterized in that the discharge system is by going out
Expect that feed bin 10, discharging spiral conveyor 11 and discharging warehouse 12 form, recirculated cooling water be wrapped in around discharging spiral conveyor,
Discharging warehouse is hermetic type warehouse, and sprinkling equipment cooling dedusting is equipped at the top of discharging warehouse.
5. the innoxious thermal desorption processing system of greasy filth according to claim 1, which is characterized in that the high-temperature burning system
By high temperature combustors 5, First air entrance 51, Secondary Air entrance 52, air inlet 53, high-temperature burner 54, offgas outlet 55 and answer
Anxious blow vent 56 forms, and high temperature combustors 5 are horizontally mounted and surrounding is coated with refractory material, high-temperature burner 54, one indoors
Secondary wind entrance 51, Secondary Air entrance 52 and air inlet 53 are mounted on one end of high temperature combustors 5, the other end of high temperature combustors 5
Offgas outlet 55 and emergency vent 56 are set, and air inlet 53 connects the exhanst gas outlet of thermal desorption system.
6. according to the innoxious thermal desorption processing system of the greasy filth of claim 1 or 4, which is characterized in that the vent gas treatment
System is made of cooling down tower 6, shaped Venturi dedusting system 7, air-introduced machine 9, the chimney 8 to connect successively, the top of cooling down tower 6
Portion connects with the offgas outlet of high-temperature burning system, and the water inlet end of cooling down tower 6 is connected with clean water tank 14, cooling down tower
6 and the water outlet of shaped Venturi dedusting system 7 connect with buck baffle-box 15, buck baffle-box 15 is through buck elevator pump 13 and inclined plate
The water inlet end of sedimentation basin 16 connects, and the water outlet of inclined-plate clarifying basin 16 connects with return water intermediate box 17, and return water intermediate box 17 goes out
Water end (W.E.) connects with the sprinkling equipment of the water inlet end of shaped Venturi dedusting system 7 and discharge system.
7. the innoxious thermal desorption processing method of greasy filth, which is characterized in that it includes following processing step：
(1) quantitative continuous conveying greasy filth：Pretreated greasy filth is continuously and uniformly sent to batch meter, by adjusting the biography of material
Defeated speed subsequently enters the treating capacity of thermal desorption room to control；
(2) greasy filth is sent into thermal desorption system processing：The thermal desorption room temperature of thermal desorption system setting is 300~800 DEG C, is stopped
Time is 10~60min；The board-like conveyer belt of STAINLESS STEEL CHAINS is equipped in thermal desorption room, by the board-like conveyer belt of STAINLESS STEEL CHAINS by greasy filth
At the uniform velocity continuously across a series of lower section of burners, the burner of use is uniformly distributed, and the independent temperature control of energy, is passed through to control and be burnt
Device makes to form basic, normal, high different temperature region in thermal desorption room；Thermal desorption room acts on forming tiny structure shape by exhaust fan
State makes the organic pollution in greasy filth be desorbed out in anoxic condition of negative pressure, avoids escaping for pollutant；
(3) will through thermal desorption system, treated that dregs is transported to discharging feed bin using screw conveyor, while after spraying cooling
It is deposited in discharging warehouse, and timing is transported outward；The flue gas that thermal desorption system processing generates is sent into high-temperature burning system, high-temp combustion
The high-temp combustion room temperature that system uses is maintained at 900~1300 DEG C, and gas residence time is 1~2s, and pollutant is in sufficient mistake
It thoroughly burns under amount air, becomes carbon dioxide and water vapour, combustion tail gas enters exhaust treatment system cooling dust separation and reaches
By in smoke stack emission to air after mark.
8. the innoxious thermal desorption processing method of greasy filth according to claim 7, which is characterized in that quantitative defeated in step (1)
Before sending greasy filth, modifier treatment first is carried out to greasy filth, greasy filth is sent into the quenched slot of sludge, greasy filth is adjusted by adding medicament
Moisture content, dispersibility, make the grain diameter of greasy filth be less than 30mm, and moisture content is less than 25%.
9. the innoxious thermal desorption processing method of greasy filth according to claim 7, which is characterized in that step (3), the tail gas
Processing system is made of cooling down tower 6, shaped Venturi dedusting system 7, air-introduced machine 9 and the chimney 8 to connect successively, vent gas treatment system
System connects with water circulation system, and water circulation system includes among clean water tank 14, buck baffle-box 15, inclined-plate clarifying basin 16 and return water
Case 17, clean water tank 14 by cool down spray pump 18 connect with the water inlet end of cooling down tower 6, the water outlet of cooling down tower 6 with
The water outlet of shaped Venturi dedusting system 7 connects with buck baffle-box 15, and buck baffle-box 15 is through buck elevator pump 13 and inclined plate
The water inlet end of sedimentation basin 16 connects, and the water outlet of inclined-plate clarifying basin 16 connects with return water intermediate box 17, and return water intermediate box 17 goes out
Water end (W.E.) connects with the sprinkling equipment of the water inlet end of shaped Venturi dedusting system 7 and the feed bin that discharges.
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| CN109720901A (en) * | 2018-11-20 | 2019-05-07 | 中科鼎实环境工程有限公司 | Modularization thermal desorption equipment |
| CN110743905A (en) * | 2019-11-22 | 2020-02-04 | 江苏国瑞特环保工程技术有限公司 | Pyrolysis oil-containing solid waste treatment method and system |
| CN110976501A (en) * | 2019-12-20 | 2020-04-10 | 纳琦绿能工程有限公司 | Thermal desorption remediation treatment method for organic matter contaminated soil |
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Application publication date: 20181012 |