CN114735920B - Horizontal stirring tempering cleaning method for oily sludge - Google Patents
Horizontal stirring tempering cleaning method for oily sludge Download PDFInfo
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- CN114735920B CN114735920B CN202210414720.7A CN202210414720A CN114735920B CN 114735920 B CN114735920 B CN 114735920B CN 202210414720 A CN202210414720 A CN 202210414720A CN 114735920 B CN114735920 B CN 114735920B
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- 238000003756 stirring Methods 0.000 title claims abstract description 109
- 239000010802 sludge Substances 0.000 title claims abstract description 84
- 238000005496 tempering Methods 0.000 title claims abstract description 48
- 238000004140 cleaning Methods 0.000 title claims abstract description 29
- 238000000034 method Methods 0.000 title claims abstract description 25
- 239000003921 oil Substances 0.000 claims abstract description 83
- 239000000463 material Substances 0.000 claims abstract description 20
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 20
- 238000000926 separation method Methods 0.000 claims abstract description 13
- 238000006243 chemical reaction Methods 0.000 claims abstract description 12
- 230000005540 biological transmission Effects 0.000 claims abstract description 9
- 238000007667 floating Methods 0.000 claims abstract description 9
- 238000004062 sedimentation Methods 0.000 claims abstract description 8
- 239000002002 slurry Substances 0.000 claims abstract description 8
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- 230000009471 action Effects 0.000 claims abstract description 4
- 239000012208 gear oil Substances 0.000 claims abstract description 4
- 238000001556 precipitation Methods 0.000 claims abstract description 4
- 239000007788 liquid Substances 0.000 claims description 37
- 239000007787 solid Substances 0.000 claims description 8
- 238000005273 aeration Methods 0.000 claims description 7
- 230000003750 conditioning effect Effects 0.000 claims description 7
- 238000002156 mixing Methods 0.000 claims description 6
- 238000005086 pumping Methods 0.000 claims description 5
- 230000001502 supplementing effect Effects 0.000 claims description 5
- 238000005192 partition Methods 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 13
- 230000008569 process Effects 0.000 abstract description 8
- 238000010438 heat treatment Methods 0.000 abstract description 7
- 230000008859 change Effects 0.000 abstract description 3
- 238000013461 design Methods 0.000 abstract description 3
- 230000005012 migration Effects 0.000 abstract description 2
- 238000013508 migration Methods 0.000 abstract description 2
- 238000005243 fluidization Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- 239000006185 dispersion Substances 0.000 description 3
- 239000013049 sediment Substances 0.000 description 3
- 238000005406 washing Methods 0.000 description 3
- 238000007599 discharging Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 238000007790 scraping Methods 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000010779 crude oil Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- -1 fluidization Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003020 moisturizing effect Effects 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 239000003209 petroleum derivative Substances 0.000 description 1
- 238000005191 phase separation Methods 0.000 description 1
- 238000011020 pilot scale process Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000005067 remediation Methods 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
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Classifications
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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
-
- 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
-
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/40—Valorisation of by-products of wastewater, sewage or sludge processing
Abstract
The invention provides a horizontal stirring tempering cleaning method for oily sludge, which comprises the following steps: firstly, quantitatively feeding oily sludge, water and a medicament into a stirring area A; secondly, starting a spiral belt stirrer a and a spiral propeller, and rapidly dispersing, fluidizing and reacting materials; thirdly, the materials treated in the second step enter a stirring area B under the slow pushing of a spiral propeller; fourthly, continuously stirring the materials treated in the third step under the action of a spiral propeller and a spiral belt stirrer b, and accelerating the tempering reaction and sedimentation separation of the oily sludge; fifthly, starting a belt oil wiper to scrape the floating oil after precipitation and separation into an oil collecting tank; and sixthly, starting the external transmission gear oil pump to periodically recycle the floating oil, and starting the external transmission slurry pump to periodically recycle the oil sludge. The invention has better effects in the aspects of automatic control, continuous tempering, high-efficiency stirring, rapid heating, rapid migration and the like, can adapt to the source diversity and property change of the oil sludge, and realizes the sectional process parameter design and the optimal combination of the oil sludge tempering.
Description
Technical Field
The invention relates to the technical fields of environmental protection, soil remediation, oil-containing sludge treatment and the like, in particular to a horizontal stirring tempering and cleaning method for oil-containing sludge.
Background
The oil sludge tempering realizes the processes of preheating materials, fluidization, medicament mixing, reaction and the like in an effective stirring mode. In order to achieve the optimal effect of the process, the conventional tempering technology generally adopts a 1-tank 1 tempering method, and two tempering tanks are used for supplying liquid to a centrifugal machine alternately. The traditional vertical stirrer is in a complete mixing and stirring mode, a plurality of reaction tanks are required to be connected in series for continuous reaction discharging, the characteristics of more sediment sedimentation in the oil sludge are considered, liquid cannot be discharged in an overflow mode after being connected in series, material circulation is realized by means of pumping, the pumping flow of the oil sludge is increased, the energy consumption is increased, and a liquid level control node is increased. Therefore, the traditional vertical stirring tempering equipment mainly adopts batch reaction.
The patent CN109647871A, a cleaning technology process of a complete set of equipment for thermal cleaning of petroleum hydrocarbon contaminated soil, adopts two horizontal double-helical-blade stirring water tank sleds to carry out oil sludge tempering and feed the oil sludge separation sleds.
The patent CN111922006A 'a horizontal triaxial stirring washing tank' provides a horizontal triaxial stirring washing tank, and the high self-control of the device is utilized to ensure that materials in the tank are uniformly stirred and completely reacted, so that the problems that the materials are incompletely reacted and cannot be washed for multiple times due to uneven stirring in the operation process of a traditional horizontal stirring system are solved.
When the 1-tank 1 tempering method is used for carrying out the service process of the oil sludge treatment technology, the connecting flow of the skid-mounted equipment pipeline valve is increased, the degree of automation is lower, and the dependence on technology and operators is larger.
Compared with the traditional stirrer, the novel horizontal triaxial stirring water-washing oil sludge conditioning system has realized great improvement in the aspects of automatic control, continuous conditioning, full stirring and the like. Along with the diversity and property change of the oil sludge sources, the new horizontal triaxial stirring system cannot realize the sectional process parameter design and the optimal combination of oil sludge tempering. If the stirring strength is high in the stage of heating, fluidization and reaction of the floor sludge with high sand content, a better fluidization tempering effect is realized; in the later period of oil sludge tempering, in order to reduce the sedimentation of the oil sludge and increase the sedimentation separation efficiency of the oil cement, the stirring intensity of the upper layer materials in the oil sludge tempering tank needs to be reduced, and the stirring intensity of the lower layer oil sludge is kept.
Therefore, the oil-containing sludge conditioning and cleaning device with high automation degree and conditioning and cleaning effects and the using method thereof are the technical problems in the technical field of oil-containing sludge treatment.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides the horizontal stirring tempering cleaning method for the oil-containing sludge, and the device adopts the combination of a plurality of stirring modes and has high automation degree.
A horizontal stirring tempering and cleaning method for oily sludge is characterized in that: comprising the following steps:
firstly, quantitatively feeding oily sludge, water and a medicament into a stirring area A;
secondly, starting a spiral belt stirrer a and a spiral propeller, and rapidly dispersing, fluidizing and reacting materials;
thirdly, the materials treated in the second step enter a stirring area B under the slow pushing of a spiral propeller;
fourthly, continuously stirring the materials treated in the third step under the action of a spiral propeller and a spiral belt stirrer b, and accelerating the tempering reaction and sedimentation separation of the oily sludge;
fifthly, starting a belt oil wiper to scrape the floating oil after precipitation and separation into an oil collecting tank;
and sixthly, starting the external transmission gear oil pump to periodically recycle the floating oil, and starting the external transmission slurry pump to periodically recycle the oil sludge.
Further, in the second step, the rotating speed of the ribbon blender a is more than or equal to 60r/min.
Further, in the fourth step, the rotating speed of the ribbon blender b is less than or equal to 60r/min.
Further, the rotating speed of the spiral propeller is 10-50 r/min.
Further, an aeration hole is arranged on the spiral propeller.
Further, in the first step, the method further comprises the step of quantitatively feeding steam into the horizontal stirring tank through the screw propeller.
Furthermore, the high-liquid-content oil-containing sludge which can be pumped by the oil-containing sludge is fed in a pumping mode, the solid oil-containing sludge is fed in a form of a grab bucket or a loader, and the solid oil-containing sludge is sent to a feeding hopper periodically and then added through a quantitative feeding device.
Further, according to experimental or empirical parameters in oil-containing sludge tempering, the mixing proportion of the oil-containing sludge and water and the addition concentration of the medicament are calculated, and the feed flow of the oil-containing sludge, the water supplementing flow of the water and the flow of the cleaning demulsifier are set in sequence.
Further, the stirring area A is provided with a high liquid level h, a high liquid level hh and a liquid level a, so that normal operation is controlled.
Furthermore, a control program is compiled in the PLC in advance, and a horizontal tempering and stirring system is started on a control cabinet by one key.
Advantageous effects
The invention has the beneficial effects that: 1. the mode that spiral belt stirrer, spiral stirring and air flow hydraulic stirring are combined enhances stirring tempering and cleaning effects, and ensures uniform and thorough stirring during cleaning of the oil sludge on the ground. 2. The spiral of device bottom accompanies steam or aerodynamic stirring, guarantees that the easy oily mud that subsides of agitator tank can upwards roll to impact cleaning to it, solve the unable effective abluent problem of subside oily mud. 3. The bottom spiral material has the stirring, cleaning and propelling functions on heavier sediment and the like, and sediment is prevented from accumulating at the bottom of the tank. 4. The device is arranged into two stirring areas, and the two stirring areas can be respectively provided with the intensity of spiral belt stirring and pneumatic stirring. When the materials just enter the stirring tank, strong stirring conditions are set, so that complete mixing and dispersion of the oil sludge are realized, the tempering effect is ensured, the steam inlet amount is enhanced, and the materials are quickly heated; and the stirring intensity is reduced in the next stirring area, proper steam or air is released at the bottom to help the crude oil washed out by tempering to float upwards for separation, and finally a scraping plate system is arranged at the top of the stirring area to realize the collection and separation of the floating oil. 5. The invention has better effects in the aspects of automatic control, continuous tempering, high-efficiency stirring, rapid heating, rapid migration and the like, can adapt to the source diversity and property change of the oil sludge, and realizes the sectional process parameter design and the optimal combination of the oil sludge tempering.
Description of the drawings:
fig. 1: the invention relates to a schematic diagram of a horizontal stirring tempering and cleaning device for oily sludge;
reference numerals: the device comprises a dosing pipeline 1, a water supplementing pipeline 2, a sludge feeding pipeline 3, a steam pipeline 4, a compressed air pipeline 5, an electromagnetic flowmeter a, an electromagnetic flowmeter B, an 8 mass flowmeter, a solid sludge feeding hopper 9, a 10 dosing device, a stirring area A, a 12 spiral belt stirrer a, a 13 spiral propeller, a 14 ultrasonic liquid level meter, a 15 stirring area B, a 16 spiral belt stirrer B, a 17-belt oil wiper, an 18 aeration hole, a 19 oil collecting tank, a 20 external transmission gear pump and a 21 external transmission slurry pump.
Detailed Description
For a clearer understanding of the objects, technical solutions and technical effects of the present invention, the present invention will be further described below, but the scope of the present invention is not limited to the following examples.
As shown in fig. 1, a horizontal stirring tempering and cleaning device for oil-containing sludge comprises: a spiral belt stirrer, a spiral propeller (13) and a horizontal stirring tank; the horizontal stirring tank comprises two different stirring areas, namely a stirring area A (11) and a stirring area B (15), wherein the bottoms of the two different stirring areas are communicated; the spiral belt stirrer comprises a spiral belt stirrer a (12) and a spiral belt stirrer B (16), wherein the spiral belt stirrer a (12) is arranged in the stirring zone A (11), and the spiral belt stirrer B (16) is arranged in the stirring zone B (15); the spiral propeller (13) is arranged at the bottom of the horizontal stirring tank and penetrates through the bottoms of the two different stirring areas.
The upper part of the stirring area A (11) is provided with a solid sludge feed hopper (9), and a quantitative feeding device (10) is arranged at the bottom of the solid sludge feed hopper (9); the upper part of the stirring area B (15) is provided with a belt oil wiper (17).
An aeration hole (18) is arranged on the spiral propeller (13); the aeration hole size on the screw is optimized, and different tempering effects can be realized.
One side of the stirring area A (11) which is different from the stirring area B (15) is also provided with a dosing pipeline (1), a water supplementing pipeline (2), an oil sludge feeding pipeline (3), and a steam pipeline (4) and a compressed air pipeline (5) which are connected with the spiral propeller. Be provided with electric-magnetic flow meter a (6) on dosing pipeline (1), be provided with electric-magnetic flow meter b (7) on moisturizing pipeline (2), fatlute material loading pipeline (3) are provided with mass flow meter (8), steam line (4) and compressed air (5) pass through the three-way valve with screw propeller (13) are connected.
The stirring zone B (15) is different from the stirring zone A (11), one side of the stirring zone A (11) is provided with an oil collecting groove (19), the oil collecting groove (19) is provided with two pipelines, and the two pipelines are respectively provided with an external gear pump (20) and an external slurry pump (21).
The stirring area A (11) and the stirring area B (15) are respectively provided with a temperature sensor.
An ultrasonic liquid level meter (14) is arranged on the stirring area A (11).
The stirring tempering system can be provided with a full-automatic programmable PLC control cabinet at any one side of the stirring tank.
Preferably, the middle of the horizontal stirring tank is separated by a partition plate.
Control parameters of the horizontal stirring tempering and cleaning device for oil-containing sludge are as follows:
the two spiral belt stirrers are driven by different variable frequency motors respectively, and can be provided with different stirring rotating speeds to obtain stirring intensity required by tempering. The stirring area A needs to strengthen the heating and fluidization reaction of the oil sludge, and the rotating speed of the spiral belt can be 60r/min or higher; in order to avoid the sedimentation of the oil sludge and increase the oil-water precipitation separation efficiency, the stirring intensity of the upper layer materials in the oil sludge conditioning tank needs to be reduced, and the stirring intensity of the lower layer oil sludge is kept. So the ribbon rotation speed can be 60r/min or less; the bottom spiral propeller can achieve normal propulsion of the oil sludge, and the rotating speed can be 10-50 r/min. The bottom spiral sets up suitable rotational speed, when promoting bottom fatlute, rotatory messenger's aeration hole sprays out the air current simultaneously and realizes 360 degrees impact and dispersion fatlute, strengthens the cleaning performance of bottom fatlute. Meanwhile, the size of aeration holes on the spiral is optimized from the feeding end to the discharging section of the bottom spiral, so that different tempering effects can be realized.
The preferred horizontal stirring tempering and cleaning method for the oily sludge comprises the following steps:
1. before starting work, the feeding mode is selected according to the characteristics of the oily sludge, the pumpable high-liquid-content oily sludge is fed in a pumping mode, the solid oily sludge is fed in a form of a grab bucket or a loader, and the solid oily sludge is sent to a feeding hopper periodically and then added through a quantitative feeding device.
2. According to pilot-scale experiments or experience parameters of oil-containing sludge conditioning, the mixing proportion of the oil-containing sludge and water is calculated, the adding concentration of the agent is calculated, and the feeding flow of the oil sludge, the water supplementing flow of the water and the flow of the cleaning demulsifier are set in sequence.
3. Heating temperature t, exceeding Wen Liang delta t, rotating speed of spiral belt stirrer a and spiral belt stirrer b are set according to oil-containing sludge tempering pilot experiment.
4. Setting liquid level values such as a high liquid level h, a high liquid level hh, a liquid level a and the like.
5. A control program is compiled in the PLC in advance, and a horizontal tempering and stirring system is started on a control cabinet by one key.
6. The oil sludge, water, medicament and steam are firstly quantitatively fed into a stirring zone A, and under the combined actions of a spiral belt stirrer rotating at high speed, rotary steam stirring at 360 ℃, spiral and the like, the materials are rapidly heated, dispersed, fluidized and reacted, so that the optimal reaction condition is created.
7. The oily sludge after preliminary dispersion, fluidization and heating enters a stirring area B under the slow propulsion of the spiral propeller, then the spiral, steam and spiral belt continue to heat and stir the oily sludge, and meanwhile, the steam has a floatation effect on the petroleum after cleaning and tempering, so that the tempering reaction and sedimentation separation effects of the oily sludge water are finally accelerated.
8. And then scraping the precipitated and separated floating oil into an oil collecting tank by a belt oil wiper, and periodically recovering the floating oil by an external transmission gear oil pump with liquid level control. And the oil sludge with qualified bottom quality is continuously conveyed to a two-phase horizontal decanter centrifuge through an external slurry conveying pump with liquid level control to further realize solid-liquid separation, or the three-phase horizontal decanter centrifuge realizes three-phase separation.
The specific control program is as follows:
the radar liquid level gauge firstly detects that the liquid level in the stirring tank is lower than a high liquid level h (delta h), and the system immediately starts a feeding system, a water pump and a dosing system; when the radar liquid level gauge detects that the liquid level exceeds a set high liquid level h (delta h), the feeding system, the water pump and the dosing system stop working; when the radar liquid level gauge detects that the liquid level exceeds the set high liquid level hh, the system alarms and stops in an emergency. Wherein δh may be set to 0.2 to 0.3m.
When the radar level gauge detects that the liquid level has reached the specified liquid level a, the liquid level can be set to be any liquid level between the submerged auger liquid level and the maximum liquid level (high liquid level h) of the stirring tank; the system automatically activates one of the screw propellers, ribbon stirrers, steam lines or ball valves for compressed air.
When the temperature of the temperature sensor in the stirring area A exceeds the set heating temperature by a certain amount, the system automatically closes the steam pipeline valve and opens the compressed air pipeline valve. The reaction temperature can be intelligently adjusted through feedback adjustment of a temperature sensor in the stirring zone A. When the temperature sensor in the stirring zone B detects that the outlet temperature reaches the set temperature, the system automatically starts the belt oil wiper and the external slurry pump.
When the radar liquid level gauge detects that the liquid level is lower than the designated liquid level a, the system automatically stops the belt oil wiper and the outer slurry conveying pump.
The above examples are only specific to the practical embodiments of the present invention, and are not intended to limit the scope of the invention, but all equivalent implementations or modifications that do not depart from the scope of the invention are included in the claims.
Claims (6)
1. A horizontal stirring tempering and cleaning method for oily sludge is characterized in that: comprising the following steps:
firstly, quantitatively feeding oily sludge, water and a medicament into a stirring area A; quantitatively feeding steam into a horizontal stirring tank through a horizontal spiral propeller (13), wherein an aeration hole is formed in the horizontal spiral propeller (13), and a steam pipeline (4) and compressed air (5) are connected with the horizontal spiral propeller (13) through a three-way valve;
secondly, starting a horizontal spiral ribbon stirrer a (12) and the horizontal spiral propeller (13), wherein the materials are rapidly dispersed, fluidized and reacted, and the rotating speed of the horizontal spiral ribbon stirrer a (12) is more than 60r/min;
thirdly, the materials treated in the second step enter a stirring area B under the slow pushing of a horizontal spiral propeller; the horizontal stirring tank comprises two different stirring areas, namely a stirring area A (11) and a stirring area B (15), wherein the bottoms of the two different stirring areas are communicated, and the middle of the two different stirring areas are separated by a partition plate;
fourthly, continuously stirring the materials treated in the third step under the action of a horizontal spiral propeller and a horizontal spiral ribbon stirrer b, and accelerating the tempering reaction and sedimentation separation of the oily sludge, wherein the rotating speed of the horizontal spiral ribbon stirrer b is less than or equal to 60r/min;
fifthly, starting a belt oil wiper to scrape the floating oil after precipitation and separation into an oil collecting tank;
and sixthly, starting the external transmission gear oil pump to periodically recycle the floating oil, and starting the external transmission slurry pump to periodically recycle the oil sludge.
2. The method for horizontally stirring, tempering and cleaning the oil-containing sludge according to claim 1, which is characterized in that: the rotating speed of the horizontal spiral propeller is 10-50 r/min.
3. The method for horizontally stirring, tempering and cleaning the oil-containing sludge according to claim 1, which is characterized in that: the oil-containing sludge can be pumped, and the high-liquid-content oil-containing sludge is fed in a pumping mode; solid oily sludge is fed in the form of a grab bucket and a loader, and is added through a quantitative feeding device.
4. The method for horizontally stirring, tempering and cleaning the oil-containing sludge according to claim 1, which is characterized in that: according to experimental or empirical parameters in the oil-containing sludge conditioning, the mixing proportion of the oil-containing sludge and water is calculated, the medicament addition concentration is calculated, and the oil sludge feeding amount, the water supplementing amount of water and the cleaning demulsifier flow are set in sequence.
5. The method for horizontally stirring, tempering and cleaning the oil-containing sludge according to claim 1, which is characterized in that: and a high liquid level h, a high liquid level hh and a liquid level a are arranged in the stirring zone A.
6. The horizontal stirring tempering cleaning method for oil-containing sludge according to any one of claims 1, 4 and 5, wherein: a control program is compiled in the PLC in advance, and a horizontal tempering and stirring system is started on a control cabinet by one key.
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| DE2750028A1 (en) * | 1977-11-09 | 1979-05-10 | Rolf Flach | METHOD FOR EXPRESSION OF CLAIMS AND DEVICE FOR CARRYING OUT THE METHOD |
| CN2558222Y (en) * | 2002-07-26 | 2003-07-02 | 刘堃 | Horizontal pushing stirring discharging device of vertical stirring tank for food freezing bulking |
| JP2008073627A (en) * | 2006-09-22 | 2008-04-03 | Nittetsu Kankyo Engineering Kk | Method of removing sludge in oil storage tank and system therefor |
| CN102992568B (en) * | 2012-12-07 | 2014-12-03 | 上海同济普兰德生物质能股份有限公司 | Slurrying and preheating device for high-dryness sludge |
| CN111560116B (en) * | 2020-05-26 | 2022-05-20 | 浙江恒澜科技有限公司 | Method for continuously producing high-viscosity polymer |
| CN215288453U (en) * | 2021-03-26 | 2021-12-24 | 盘锦宁泰能源科技有限公司 | Hot washing equipment for dirty oil sludge |
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Effective date of registration: 20220923 Address after: Xiliangwan Village, Yanchangbao Town, Dingbian County, Yulin City, Shaanxi Province 718600 Applicant after: Dingbian guanbo Environmental Protection Technology Co.,Ltd. Address before: No.57, Haike Road West Section, Chengdu cross strait science and Technology Industry Development Park, Wenjiang District, Chengdu City, Sichuan Province Applicant before: ZHENG SHENG ENVIRONMENTAL TECHNOLOGY Co.,Ltd. |
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Denomination of invention: A horizontal stirring and tempering cleaning method for oily sludge Granted publication date: 20230516 Pledgee: Zheshang Bank Co.,Ltd. Chengdu Branch Pledgor: Dingbian guanbo Environmental Protection Technology Co.,Ltd. Registration number: Y2024980003293 |