CN106765200A - Oilfield drilling mud castoff processing system - Google Patents
Oilfield drilling mud castoff processing system Download PDFInfo
- Publication number
- CN106765200A CN106765200A CN201611050955.3A CN201611050955A CN106765200A CN 106765200 A CN106765200 A CN 106765200A CN 201611050955 A CN201611050955 A CN 201611050955A CN 106765200 A CN106765200 A CN 106765200A
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- Prior art keywords
- drilling mud
- processing system
- outlet
- combustion chamber
- air
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Classifications
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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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J15/00—Arrangements of devices for treating smoke or fumes
- F23J15/02—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material
- F23J15/04—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material using washing fluids
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G2204/00—Supplementary heating arrangements
- F23G2204/10—Supplementary heating arrangements using auxiliary fuel
- F23G2204/101—Supplementary heating arrangements using auxiliary fuel solid fuel
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G2209/00—Specific waste
- F23G2209/12—Sludge, slurries or mixtures of liquids
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J2217/00—Intercepting solids
- F23J2217/50—Intercepting solids by cleaning fluids (washers or scrubbers)
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Treatment Of Sludge (AREA)
Abstract
The invention discloses a kind of oilfield drilling mud castoff processing system, including base, Pulverized Coal Bin is sequentially installed with base, material bin, combustion chamber, dust removing purifier and tail gas purification tower, the outlet of Pulverized Coal Bin is connected by power transportation pipe with the coal dust import of combustion chamber, the outlet of material bin is connected by material conveying pipe with the material inlet of combustion chamber, the gas outlet of combustion chamber is connected with the air inlet of dust removing purifier, air-introduced machine is provided between dust removing purifier and tail gas purification tower, the gas outlet of dust removing purifier is connected with the air inlet of air-introduced machine, the gas outlet of air-introduced machine is connected with the air inlet of tail gas purification tower, the top of tail gas purification tower is provided with gas discharge outlet up to standard.Treatment effeciency of the present invention is high, and good stability is simple to operate, and floor space is small, convenient transfer；Equipment can be produced to realize docking completely with drilling mud discarded object, it is ensured that not landing completely for mud discarded object, protect drillng operation surrounding environment, meet discharging standards.
Description
Technical field
The invention belongs to oilfield drilling waste remediation technical field, and in particular to a kind of oilfield drilling mud is discarded
Thing processing system.
Background technology
Drilling mud discarded object is a kind of extremely complex dispersion, is that drilling waste water, drilling mud and landwaste etc. are more
Plant the mixture of material.Drilling mud discarded object is a kind of colloidal suspension system of quite stable, containing clay, weighting material,
Various chemical treatments, sewage, oil-free and drilling cuttings etc., wherein, environmentally hazardous main chemical compositions have hydro carbons, salt, all kinds of
The modifiers such as debris and pitch in polymer, heavy metal ion, barite.These pollutants have high chroma, petroleum-type high,
The characteristics such as high chemical oxygen demand, high suspended matter, high salinity, are the major pollutants of generation in petroleum exploration and development process.Oil
Gas field is often bunged down, and a mud pit will be dug near well head, due to discarding for the processes such as storage drilling well, completion, well workover
Thing is highly contaminating thing seepage and excessive, and underground water and Soil Surrounding are polluted, and prevents land occupation from second ploughing
It is uncultivated.
Drilling waste water, mud and landwaste etc. are continuously generated with drilling process, though total amount is less, due to its table
Face is stained with many drilling muds, is difficult to convey and clears up.At present, drilling process and terminate after all mud and its discarded object
Mud pit is emitted into, then by a certain amount of curing agent is added in mud and its discarded object, being run through chemical reaction
The solid (false soil) as soil is changed into, landfill is in original place or transports to certain appointed place.The consumption of curing agent is about
1/3 or so of discarded object total amount is accounted for, curing agent mainly has：Flyash, lime, cement, waterglass etc., this is greatly increased
The total amount and processing cost of discarded object；The leachate of discarded object still can produce serious to underground water after more seriously burying
Pollution.
In addition, in oilfield drilling field, either new environmental law is to oil field operation requirement, or oil field equipment pendulum
Put, pass in and out be required for realizing drilling mud discarded object do not land treatment, while reducing drilling mud discarded object to drilling well periphery
The pollution of environment.Therefore, it is badly in need of wanting a kind of colleges and universities' treatment oilfield drilling mud discarded object not land processing system, effectively will
Mud discarded object is converted into the product of environmental sound.
The content of the invention
It is an object of the invention to overcome above-mentioned deficiency of the prior art, there is provided a kind of oilfield drilling mud discarded object
Processing system, its treatment effeciency is high, and good stability is simple to operate, and floor space is small, convenient transfer；Can be discarded with drilling mud
Produce generating apparatus are realized docking completely, it is ensured that not landing completely for mud discarded object, protect drillng operation surrounding environment, meet state
Family's discharge standard, facilitates the schedule of situ of drilling well equipment.
To achieve the above object, the technical solution adopted by the present invention is：A kind of oilfield drilling mud offal treatment system
System, it is characterised in that：Including base, be sequentially installed with the base Pulverized Coal Bin, material bin, combustion chamber, dust removing purifier and
Tail gas purification tower, the outlet of the Pulverized Coal Bin is connected by power transportation pipe with the coal dust import of the combustion chamber, the thing
The outlet of feed bin is connected by material conveying pipe with the material inlet of the combustion chamber, the gas outlet of the combustion chamber and dedusting
The air inlet connection of clarifier, is provided with air-introduced machine, the dust removing purifier between the dust removing purifier and tail gas purification tower
Gas outlet be connected with the air inlet of air-introduced machine, the gas outlet of the air-introduced machine is connected with the air inlet of tail gas purification tower, described
The top of tail gas purification tower is provided with gas discharge outlet up to standard.
Above-mentioned oilfield drilling mud castoff processing system, it is characterised in that：The combustion chamber include burning cavity,
Cooling cavity and air channel, the cooling cavity are arranged on the lower section of the burning cavity, and the bottom of the cooling cavity is provided with
Material outlet, the air channel is arranged on the top of the burning cavity；The burning cavity includes outer burning cavity and interior burning
Cavity, the interior burning cavity is arranged in outer burning cavity, and the top of the outer burning cavity is provided with crater, it is described go out fire
Mouth is communicated with air channel, and the top in the air channel is provided with and passage is arranged outside hot gas, and hot gas gas outlet, the heat are provided with the air channel
Gas gas outlet is communicated with row's passage outside hot gas, and the interior burning cavity is communicated with air channel and cooling cavity；The combustion chamber
Gas outlet is arranged on outside hot gas and arranges on passage, and the material inlet is arranged on air channel.
Above-mentioned oilfield drilling mud castoff processing system, it is characterised in that：Pacify outside the top of the cooling cavity
Equipped with annular coal dust channel, the bottom of the outer burning cavity is provided with exocoel shower nozzle, and the bottom of the interior burning cavity is installed
There is inner chamber shower nozzle, the exocoel shower nozzle and inner chamber shower nozzle are communicated with annular coal dust channel.
Above-mentioned oilfield drilling mud castoff processing system, it is characterised in that：Support base is installed on the base,
The cooling cavity is arranged on support base.
Above-mentioned oilfield drilling mud castoff processing system, it is characterised in that：The top of passage is arranged outside the hot gas
It is provided with observation panel.
Above-mentioned oilfield drilling mud castoff processing system, it is characterised in that：The dust removing purifier includes dedusting
Purifying box, is provided with water mist sprinkling pipeline, the gas outlet of the combustion chamber and the udst separation case in the udst separation case
On air inlet connection, the gas outlet on the udst separation case is connected with the air inlet of air-introduced machine.
Above-mentioned oilfield drilling mud castoff processing system, it is characterised in that：The quantity of the water mist sprinkling pipeline
It it is many, many water mist sprinkling pipelines are uniformly laid.
Above-mentioned oilfield drilling mud castoff processing system, it is characterised in that：Set vertically in the udst separation case
Baffle plate is equipped with, the lower end of the baffle plate is fixed on the lower wall of the udst separation case, the upper end of the baffle plate and the dedusting
Distance is left between the upper wall of purifying box.
Above-mentioned oilfield drilling mud castoff processing system, it is characterised in that：The quantity of the baffle plate is polylith, many
Baffle plate is uniformly laid described in block, and the baffle plate and water mist sprinkling pipeline enclosure are every laying.
Above-mentioned oilfield drilling mud castoff processing system, it is characterised in that：The base is bridge base.
The present invention has advantages below compared with prior art：
1st, treatment effeciency of the present invention is high, and good stability is simple to operate；Pulverized Coal Bin, material bin, combustion chamber, dust removing purifier
It is installed on base with tail gas purification tower, base uses bridge structure, overall floor space is small, convenient transfer.
2nd, the present invention can with drilling mud discarded object produce equipment realize dock completely, it is ensured that mud discarded object completely not
Landing, protects drillng operation surrounding environment, facilitates the schedule of situ of drilling well equipment.
3rd, processing system of the invention be to mud discarded object the mixtures such as drilling waste water, drilling mud and landwaste unify into
Row treatment, processing system is simple, high treating effect.
4th, the present invention is modular system design, and unit can be set up in parallel multiple, can be according to well site and discarded object
Situation and scale assemble each equipment.
5th, after the present invention is to oilfield drilling offal treatment, harmless to environment, minimizing, resource requirement be can reach.
6th, processing system of the present invention will not produce any pollutant, final material residue can to recycle, final row
Put and meet discharging standards.
Below by drawings and Examples, the present invention is described in further detail.
Brief description of the drawings
Fig. 1 is structural representation of the invention.
Description of reference numerals:
1-Pulverized Coal Bin；2-base；3-power transportation pipe；
4-material bin；5-material conveying pipe；6-material inlet；
7-air channel；8-outer burning cavity；9-observation panel；
10-annular coal dust channel；11-exocoel shower nozzle；12-gas discharge outlet up to standard；
13-crater；14-inner chamber shower nozzle；The import of 15-coal dust；
16-material outlet；17-support base；18-dust removing purifier；
19-baffle plate；20-water mist sprinkling pipeline；21-hot gas gas outlet；
22-air-introduced machine；23-tail gas purification tower；24-interior burning cavity；
25-cooling cavity；Passage is arranged outside 26-hot gas.
Specific embodiment
As shown in figure 1, the present invention includes base 2, Pulverized Coal Bin 1, material bin 4, burning are sequentially installed with the base 2
Room, dust removing purifier 18 and tail gas purification tower 23, the outlet of the Pulverized Coal Bin 1 pass through power transportation pipe 3 and the combustion chamber
Coal dust import 15 connect, the outlet of the material bin 4 is connected by material conveying pipe 5 with the material inlet 6 of the combustion chamber
Connect, the gas outlet of the combustion chamber is connected with the air inlet of dust removing purifier 18, the dust removing purifier 18 and tail gas purification tower
Air-introduced machine 22 is provided between 23, the gas outlet of the dust removing purifier 18 is connected with the air inlet of air-introduced machine 22, the air inducing
The gas outlet of machine 22 is connected with the air inlet of tail gas purification tower 23, and the top of the tail gas purification tower 23 is provided with gas row up to standard
Put mouth 12.
In oilfield drilling mud castoff processing system of the present invention, Pulverized Coal Bin, material bin, combustion chamber, dust removing purifier
It is installed on base with tail gas purification tower, base uses bridge structure, overall floor space is small, convenient transfer.Combustion chamber
Temperature is high, can carry out fully calcined, drying and other treatment to oilfield drilling mud (material), and treatment effeciency is high；Material is subsequently entered
Cooling cavity 25 is lowered the temperature, and the material after cooling discharges burning outdoor by material outlet 16, can recycle, final thing
Material residue discharge meets discharging standards.The gas produced in material calcining, drying process, sequentially passes through dust removing purifier
18 and after tail gas purification tower 23 processes, tail gas can qualified discharge, therefore the processing system vent gas treatment effect is good.
As shown in figure 1, the combustion chamber includes burning cavity, cooling cavity 25 and air channel 7, the cooling cavity 25 is set
In the lower section of the burning cavity, the bottom of the cooling cavity 25 is provided with material outlet 16, and the air channel 7 is arranged on described
The top of burning cavity；The burning cavity includes outer burning cavity 8 and interior burning cavity 24, and the interior burning cavity 24 is set
In outer burning cavity 8, the top of the outer burning cavity 8 is provided with crater 13, and the crater 13 is communicated with air channel 7, institute
The top for stating air channel 7 is provided with row's passage 26 outside hot gas, and hot gas gas outlet 21, the hot gas gas outlet are provided with the air channel 7
21 are communicated with row's passage 26 outside hot gas, and the interior burning cavity 24 is communicated with air channel 7 and cooling cavity 25；The combustion chamber
Gas outlet is arranged on outside hot gas and arranges on passage 26, and the material inlet 6 is arranged on air channel 7.
24 two cavitys of outer burning cavity 8 and interior burning cavity are designed as by by burning cavity so that material can fill
Divided combustion, it is proposed that to material calcining, the treatment effect of desiccation；Cooling cavity 25 can enter to the rear material of calcining, drying and other treatment
Row cooling, prevents directly outer row from causing danger to operator.
As shown in figure 1, being provided with annular coal dust channel 10, the outer burning cavity 8 outside the top of the cooling cavity 25
Bottom exocoel shower nozzle 11 is installed, the bottom of the interior burning cavity 24 is provided with inner chamber shower nozzle 14, the exocoel shower nozzle 11
Communicated with annular coal dust channel 10 with inner chamber shower nozzle 14.
In the present embodiment, support base 17 is installed on the base 2, the cooling cavity 25 is arranged on support base 17.
In the present embodiment, outside the hot gas arrange passage 26 top be provided with observation panel 9, can check at any time material calcining,
Desiccation situation.
As shown in figure 1, the dust removing purifier 18 includes udst separation case, water smoke spray is installed in the udst separation case
Shower pipe road 20, the gas outlet of the combustion chamber is connected with the air inlet on the udst separation case, on the udst separation case
Gas outlet is connected with the air inlet of air-introduced machine 22.
In the present embodiment, the quantity of the water mist sprinkling pipeline 20 is many, and many water mist sprinkling pipelines 20 are uniform
Lay.
As shown in figure 1, be vertically arranged with baffle plate 19 in the udst separation case, the lower end of the baffle plate 19 is fixed on described
On the lower wall of udst separation case, distance is left between the upper wall of the upper end of the baffle plate 19 and the udst separation case；Baffle plate 19
Barrier effect is played to gas, it is ensured that gas is by abundant udst separation.
In the present embodiment, the quantity of the baffle plate 19 is polylith, and baffle plate 19 described in polylith is uniformly laid, the He of the baffle plate 19
Lay at the interval of water mist sprinkling pipeline 20.
In the present embodiment, the base 2 is bridge base, is easy to processing system integrally to carry.
Operation principle of the invention is：In the presence of air blower, coal dust enters annular coal dust by power transportation pipe 3
In passage 10, then sprayed into interior burning cavity 24 respectively through inner chamber shower nozzle 14, outer combustion chamber is sprayed into by exocoel shower nozzle 11
Burnt in body 8, produced thermal-flame and high-temperature gas, thermal-flame and high-temperature gas are entered air channel by crater 13
In 7.Now material is injected into air channel 7 in the presence of product pump by material conveying pipe 5, and material fills in air channel 7
Divide and contacted with thermal-flame and high-temperature gas, promote material quick burning, desiccation；In the material after desiccation is entered into
Desiccation is carried out in burning cavity 24 again, subsequent material enters cooling cavity 25 and lowered the temperature, and the material after cooling passes through material
The discharge burning of outlet 16 is outdoor.
At the same time, the vapours that material is produced during calcining, desiccation enters into heat by hot gas gas outlet 21
Arranged in passage 26 outside gas, hot gas carries out gas purification treatment into dust removing purifier 18 is interior.Water smoke spray in dust removing purifier 18
Shower pipe road 20 sprays out water smoke, and the hot gas and dust of entrance are contacted with water smoke, and water smoke is lowered the temperature and dust removal process to hot gas, heat
Gas is moved rearwards by the presence of air-introduced machine 22；Acted on by baffle plate 19, hot gas is carried out in dust removing purifier 18 with water smoke
Fully, multiple contact, promotes hot gas to reach more preferable purifying and dedusting and processes.The effect that gas after treatment passes through air-introduced machine 22
The purified treatment again of tail gas purification tower 23 is entered into, last gas up to standard is discharged by gas discharge outlet up to standard 12.
The above, is only presently preferred embodiments of the present invention, and not the present invention is imposed any restrictions, every according to the present invention
Any simple modification, change and equivalent structure transformation that technical spirit is made to above example, still fall within skill of the present invention
In the protection domain of art scheme.
Claims (10)
1. oilfield drilling mud castoff processing system, it is characterised in that：Including base (2), pacify successively on the base (2)
Equipped with Pulverized Coal Bin (1), material bin (4), combustion chamber, dust removing purifier (18) and tail gas purification tower (23), the Pulverized Coal Bin (1)
Outlet is connected by power transportation pipe (3) with the coal dust import (15) of the combustion chamber, and the outlet of the material bin (4) passes through
Material conveying pipe (5) is connected with the material inlet (6) of the combustion chamber, the gas outlet of the combustion chamber and dust removing purifier
(18) air inlet connection, is provided with air-introduced machine (22) between the dust removing purifier (18) and tail gas purification tower (23), described
The gas outlet of dust removing purifier (18) is connected with the air inlet of air-introduced machine (22), and the gas outlet of the air-introduced machine (22) is net with tail gas
Change the air inlet connection of tower (23), the top of the tail gas purification tower (23) is provided with gas discharge outlet up to standard (12).
2. according to the oilfield drilling mud castoff processing system described in claim 1, it is characterised in that：The combustion chamber bag
Burning cavity, cooling cavity (25) and air channel (7) are included, cooling cavity (25) is arranged on the lower section of the burning cavity, institute
The bottom for stating cooling cavity (25) is provided with material outlet (16), and the air channel (7) is installed in the top of the burning cavity；Institute
Stating burning cavity includes outer burning cavity (8) and interior burning cavity (24), and the interior burning cavity (24) is arranged on outer combustion chamber
In body (8), the top of the outer burning cavity (8) is provided with crater (13), and the crater (13) communicates with air channel (7), institute
The top for stating air channel (7) is provided with outside hot gas and arranges passage (26), and hot gas gas outlet (21), the heat are provided with the air channel (7)
Gas gas outlet (21) communicates with passage (26) is arranged outside hot gas, the interior burning cavity (24) and air channel (7) and cavity (25) of lowering the temperature
Communicate；The gas outlet of the combustion chamber is arranged on outside hot gas arranges on passage (26), and the material inlet (6) is arranged on air channel
(7) on.
3. according to the oilfield drilling mud castoff processing system described in claim 2, it is characterised in that：The cooling cavity
(25) annular coal dust channel (10) is installed, the bottom of the outer burning cavity (8) is provided with exocoel shower nozzle (11) outside top,
The bottom of the interior burning cavity (24) is provided with inner chamber shower nozzle (14), the exocoel shower nozzle (11) and inner chamber shower nozzle (14) with
Annular coal dust channel (10) communicates.
4. according to the oilfield drilling mud castoff processing system described in Claims 2 or 3, it is characterised in that：The base
(2) support base (17) is installed, cooling cavity (25) is on support base (17) on.
5. according to the oilfield drilling mud castoff processing system described in Claims 2 or 3, it is characterised in that：The hot gas
The top of outer row's passage (26) is provided with observation panel (9).
6. according to the oilfield drilling mud castoff processing system described in claim 1, it is characterised in that：The udst separation
Device (18) includes udst separation case, and water mist sprinkling pipeline (20), the outlet of the combustion chamber are provided with the udst separation case
Mouth is connected with the air inlet on the udst separation case, the air inlet of the gas outlet on the udst separation case and air-introduced machine (22)
Connection.
7. according to the oilfield drilling mud castoff processing system described in claim 6, it is characterised in that：The water mist sprinkling
The quantity of pipeline (20) is many, and many water mist sprinkling pipelines (20) are uniformly laid.
8. according to the oilfield drilling mud castoff processing system described in claim 6 or 7, it is characterised in that：The dedusting
Baffle plate (19) is vertically arranged with purifying box, the lower end of the baffle plate (19) is fixed on the lower wall of the udst separation case, institute
State and leave distance between the upper end of baffle plate (19) and the upper wall of the udst separation case.
9. according to the oilfield drilling mud castoff processing system described in claim 6, it is characterised in that：The baffle plate (19)
Quantity be polylith, baffle plate (19) described in polylith uniformly lay, the baffle plate (19) and water mist sprinkling pipeline (20) interval laying.
10. according to the oilfield drilling mud castoff processing system described in claim 1 or 2, it is characterised in that：The base
(2) it is bridge base.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611050955.3A CN106765200B (en) | 2016-11-24 | 2016-11-24 | Oilfield drilling mud castoff processing system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611050955.3A CN106765200B (en) | 2016-11-24 | 2016-11-24 | Oilfield drilling mud castoff processing system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106765200A true CN106765200A (en) | 2017-05-31 |
| CN106765200B CN106765200B (en) | 2018-12-21 |
Family
ID=58910659
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611050955.3A Active CN106765200B (en) | 2016-11-24 | 2016-11-24 | Oilfield drilling mud castoff processing system |
Country Status (1)
| Country | Link |
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| CN (1) | CN106765200B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111701985A (en) * | 2020-06-27 | 2020-09-25 | 商洛市海蓝科技有限公司 | Oil field solid waste microwave degradation processing unit |
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| CN105888614A (en) * | 2016-05-27 | 2016-08-24 | 商洛市海蓝科技有限公司 | Oil-gas field well drilling waste sludge treatment device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPH01288387A (en) * | 1988-05-13 | 1989-11-20 | Kobe Steel Ltd | Melting furnace for industrial waste |
| CN1372103A (en) * | 2001-02-28 | 2002-10-02 | 吴中兴 | Incinerator for maize cob |
| CN101397517A (en) * | 2007-09-29 | 2009-04-01 | 中国石油天然气股份有限公司 | Method for preparing oil-containing sludge fuel |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111701985A (en) * | 2020-06-27 | 2020-09-25 | 商洛市海蓝科技有限公司 | Oil field solid waste microwave degradation processing unit |
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| Publication number | Publication date |
|---|---|
| CN106765200B (en) | 2018-12-21 |
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