CN107189863B - Pollution-free treatment process and equipment for waste carclazyte - Google Patents
Pollution-free treatment process and equipment for waste carclazyte Download PDFInfo
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- CN107189863B CN107189863B CN201710531599.5A CN201710531599A CN107189863B CN 107189863 B CN107189863 B CN 107189863B CN 201710531599 A CN201710531599 A CN 201710531599A CN 107189863 B CN107189863 B CN 107189863B
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- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11B—PRODUCING, e.g. BY PRESSING RAW MATERIALS OR BY EXTRACTION FROM WASTE MATERIALS, REFINING OR PRESERVING FATS, FATTY SUBSTANCES, e.g. LANOLIN, FATTY OILS OR WAXES; ESSENTIAL OILS; PERFUMES
- C11B13/00—Recovery of fats, fatty oils or fatty acids from waste materials
- C11B13/04—Recovery of fats, fatty oils or fatty acids from waste materials from spent adsorption materials
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- 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
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/74—Recovery of fats, fatty oils, fatty acids or other fatty substances, e.g. lanolin or waxes
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Abstract
The invention discloses a nuisanceless treatment process and equipment for waste clay, wherein the nuisanceless treatment process for waste clay comprises the steps of firstly adopting a low-temperature thermal distillation method to dry and dehydrate the waste clay, treating water and volatile matters generated in the dehydration process, recycling the water and volatile matters, separating oil products in the waste clay by a high-temperature calcination method from the dehydrated waste clay, and treating and recycling the generated oil products to obtain nuisanceless clay; the waste carclazyte pollution-free treatment equipment comprises a low-temperature rotary heating furnace and a high-temperature rotary heating furnace, wherein the discharge end of the low-temperature rotary heating furnace is communicated with a low-temperature sealing bin through a low-temperature discharge screw conveyor, and the low-temperature sealing bin is divided into an upper part and a lower part; the inlet end of the high-temperature rotary heating furnace is connected with a high-temperature sealing bin, and the outlet end of the high-temperature rotary heating furnace is communicated with the cooler through a high-temperature discharging screw conveyor. The treatment equipment has the advantages of high recovery rate of oil, high automation degree, easy operation, low investment cost and no pollution to the environment.
Description
Technical Field
The invention belongs to the technical field of waste clay treatment generated in the refining process of lubricating oil and paraffin in the chemical industry, and mainly relates to a pollution-free treatment process and equipment for waste clay, which are suitable for pollution-free treatment of waste clay generated in the refining process of lubricating oil and paraffin.
Background
In the refining process of lubricating oil and paraffin, activated clay is generally used for adsorbing impurities in the lubricating oil and paraffin to achieve the aim of refining, and the clay with the impurities adsorbed after the refining is finished simultaneously adsorbs a large amount of lubricating oil and paraffin, so that the waste clay containing lubricating oil or paraffin is changed into a waste clay containing lubricating oil or paraffin; the produced spent bleaching clay not only pollutes the environment but also has the risk of fire, and causes the waste of petroleum resources.
At present, a plurality of treatment methods for the spent bleaching clay mainly comprise a hot water washing method, a surfactant water washing method, an extraction method, an ultrasonic oil removal method, a supercritical treatment method and the like. However, the treatment method has the defects of complex process, secondary pollution, high equipment investment cost, high energy consumption and the like.
Disclosure of Invention
The invention provides a process and equipment for nuisanceless treatment of waste clay, which aims at improving the recovery oil rate, reducing the investment cost, simplifying the production process and realizing nuisanceless treatment of waste clay.
The technical scheme adopted by the invention for achieving the purpose is as follows: firstly, drying and dehydrating the waste clay by adopting a low-temperature thermal distillation method, treating and recycling moisture and volatile matters generated in the dehydration process, separating oil products in the waste clay by adopting a high-temperature calcination method from the dehydrated waste clay, and treating and recycling the generated oil products to obtain the pollution-free clay. The specific implementation steps are as follows:
1) The low temperature thermal distillation method is to add inert atmosphere or vacuum atmosphere to heat to 250-400 deg.c in a low temperature rotary heating furnace to maintain the temperature for 1-2 hr to produce water vapor and partial organic matter, and to obtain oil product, waste water and waste gas through condensation and oil-water separation.
2) The high temperature calcination method is to heat the waste gas to 360-800 deg.c in a high temperature rotary heating furnace in sealed air or nitrogen atmosphere for 1-2 hr, and to condense, alkali wash and recover the produced oil product after cooling.
The invention relates to equipment for a pollution-free treatment process of waste carclazyte, which comprises a low-temperature rotary heating furnace and a high-temperature rotary heating furnace, wherein a feeding end of the low-temperature rotary heating furnace is communicated with a raw material bin, a discharging end of the low-temperature rotary heating furnace is communicated with a low-temperature sealing bin through a low-temperature discharging screw conveyor, the low-temperature sealing bin is divided into an upper part and a lower part, wherein the upper part sealing bin is connected with a low-temperature condenser and a low-temperature alkaline washing device through pipelines, the lower part of the condenser is connected with an oil storage device through pipelines, an exhaust port end of the low-temperature alkaline washing device is communicated with a combustion system of the low-temperature rotary heating furnace, and the lower part sealing bin is communicated with an inlet of the high-temperature rotary heating furnace; the high-temperature rotary heating furnace comprises a high-temperature rotary heating furnace, a high-temperature condenser and a high-temperature alkaline washing device, wherein the high-temperature rotary heating furnace is characterized in that the inlet end of the high-temperature rotary heating furnace is connected with the high-temperature sealing bin, the high-temperature sealing bin is connected with the high-temperature condenser and the high-temperature alkaline washing device through pipelines, the lower part of the condenser is connected with the oil storage device through pipelines, the exhaust port end of the high-temperature alkaline washing device is communicated with a combustion system of the high-temperature rotary heating furnace, and the outlet end of the high-temperature rotary heating furnace is communicated with a cooler through a high-temperature discharge screw conveyor.
Further, a low-temperature feeding screw conveyor is connected to the feeding port end of the low-temperature rotary heating furnace, a secondary raw material bin is connected to the low-temperature feeding screw conveyor, and the secondary raw material bin is communicated with the raw material screw conveyor and the raw material bin through a front-end bucket elevator.
Further, the inlet end of the high-temperature rotary heating furnace and the outlet end of the low-temperature rotary heating furnace are connected with a middle screw conveyor, one end of the middle screw conveyor is communicated with the lower sealing bin of the low-temperature rotary heating furnace, and the other end of the middle screw conveyor is communicated with the high-temperature feeding screw conveyor.
Further, a high-temperature feeding screw conveyor is connected to the inlet end of the high-temperature rotary heating furnace, and a high-temperature sealing bin is communicated above the high-temperature feeding screw conveyor.
Further, a cooler communicated with the outlet end of the high-temperature rotary heating furnace is communicated with a tail end bucket elevator, the tail end of the tail end bucket elevator is communicated with a finished product bin, and a dust remover is arranged above the finished product bin.
Further, three temperature sensors are arranged in the low-temperature rotary heating furnace and the high-temperature rotary heating furnace.
Further, upper, middle and lower material level sensors are arranged in the lower sealing bin of the raw material bin and the low-temperature sealing bin.
The invention has the following beneficial effects:
1) The pollution-free treatment process of the waste clay is simple, the lubricating oil or paraffin in the waste clay is gasified and collected and utilized by heating, the oil in the waste clay is recovered as high as possible, the process is simple and easy to realize, and the pollution to the environment is avoided.
2) The waste carclazyte pollution-free treatment equipment has the advantages of simple integral structure, low investment cost, high automation degree, easy operation and high recovery rate of oil products, and can realize pollution-free treatment of the waste carclazyte.
Drawings
FIG. 1 is a schematic view of a pollution-free treatment apparatus for spent bleaching clay according to the present invention
In the figure: 1. raw material bin, 2, raw material screw conveyor, 3, front end bucket elevator, 4, second grade raw material bin, 5, low temperature feeding screw conveyor, 6, low temperature rotary furnace, 7, low temperature ejection of compact screw conveyor, 8, low temperature seal storehouse, 9, middle screw conveyor, 10, high temperature feeding screw conveyor, 11, high temperature seal storehouse, 12, high temperature rotary furnace, 13, high temperature ejection of compact screw conveyor, 14, cooler, 15, terminal bucket elevator, 16, finished product storehouse, 17, dust remover, 18, low temperature condenser, 19, low temperature alkaline cleaning device, 20, high temperature condenser, 21, high temperature alkaline cleaning device, 22, oil storage device.
Description of the embodiments
The invention will be described in detail with reference to the accompanying drawings and specific embodiments:
the pollution-free treatment process of the spent bleaching clay comprises a low-temperature thermal distillation method and a high-temperature calcination method, and comprises the following specific implementation steps:
1) The low temperature thermal distillation method is to add inert atmosphere or vacuum atmosphere to heat to 250-400 deg.c in a low temperature rotary heating furnace to maintain the temperature for 1-2 hr to produce water vapor and partial organic matter, and to obtain oil product, waste water and waste gas through condensation and oil-water separation.
Heating to 400 ℃ in a low-temperature rotary heating furnace in inert atmosphere or vacuum atmosphere, wherein the oil removal rate can reach 39% in the process of heat preservation for 2 hours, wherein non-condensable gas (CH 4 、NH 3 、N 2 H 4 、C 3 H 8 C (C) 4 H 10 Etc.) approximately 15% and the recovered oil content approximately 24%.
2) The high temperature calcination method is to heat the waste gas to 360-800 deg.c in a high temperature rotary heating furnace in sealed air or nitrogen atmosphere for 1-2 hr, and to condense, alkali wash and recover the produced oil product after cooling.
In the process of high-temperature calcination at 800 ℃ in an air atmosphere and heat preservation for 2 hours, the oil removal rate can reach 7.54 percent, wherein the gas (H) 2 O，H 2 S or H 2 O 2 ，C 3 H 4 ，C 3 H 8 C (C) 3 H 6 ) And (3) generating. Air is blown in by a blower, and air and generated gas are completely collected and desulfurization treatment is performed.White pollution-free clay can be obtained after the high-temperature calcination process treatment, wherein carbon is removed cleanly.
In the process of calcining at high temperature of 800 ℃ in nitrogen atmosphere and preserving heat for 2h, the oil removal rate can reach 7.47%, wherein the gas (C) 3 H 8 ，CH 4 And other small amount of hydrocarbon), the gas can be recycled, and the waste clay is black due to carbon after being treated by the high-temperature calcination process.
As shown in fig. 1, the equipment of the pollution-free treatment process of the spent bleaching clay comprises a low-temperature rotary heating furnace 6 and a high-temperature rotary heating furnace 12, wherein the feeding end of the low-temperature rotary heating furnace is communicated with a raw material bin 1, the discharging end of the low-temperature rotary heating furnace is communicated with a low-temperature sealing bin 8 through a low-temperature discharging screw conveyor 7, the low-temperature sealing bin is divided into an upper part and a lower part, wherein the upper part sealing bin is connected with a low-temperature condenser 18 and a low-temperature alkaline washing device 19 through pipelines, the lower part of the condenser is connected with an oil storage device 22 through pipelines, the exhaust port end of the low-temperature alkaline washing device is communicated with a combustion system of the low-temperature rotary heating furnace, and the lower part sealing bin is communicated with an inlet of the high-temperature rotary heating furnace; the high-temperature rotary heating furnace is characterized in that a high-temperature sealing bin 11 is connected to the inlet end of the high-temperature rotary heating furnace, the high-temperature sealing bin is connected with a high-temperature condenser 20 and a high-temperature alkaline washing device 21 through pipelines, the lower part of the condenser is connected with an oil storage device 22 through pipelines, the exhaust port end of the high-temperature alkaline washing device is communicated with the combustion system of the high-temperature rotary heating furnace, and the outlet end of the high-temperature rotary heating furnace is communicated with a cooler 14 through a high-temperature discharge screw conveyor 13.
Further, a low-temperature feeding screw conveyor 5 is connected to the feeding port end of the low-temperature rotary heating furnace, a secondary raw material bin 4 is connected to the low-temperature feeding screw conveyor, and the secondary raw material bin is communicated with the raw material screw conveyor 2 and the raw material bin 1 through a front-end bucket elevator 3.
Further, the inlet end of the high-temperature rotary heating furnace and the outlet end of the low-temperature rotary heating furnace are connected with a middle screw conveyor 9, one end of the middle screw conveyor is communicated with the lower sealing bin of the low-temperature rotary heating furnace, and the other end of the middle screw conveyor is communicated with a high-temperature feeding screw conveyor 10.
Further, a high-temperature feeding screw conveyor is connected to the inlet end of the high-temperature rotary heating furnace, and a high-temperature sealing bin 11 is communicated above the high-temperature feeding screw conveyor.
Further, a cooler communicated with the outlet end of the high-temperature rotary heating furnace is communicated with a tail end bucket elevator 15, the tail end of the tail end bucket elevator is communicated with a finished product bin 16, and a dust remover 17 is arranged above the finished product bin.
Further, three temperature sensors are arranged in the low-temperature rotary heating furnace and the high-temperature rotary heating furnace.
Further, upper, middle and lower material level sensors are arranged in the lower sealing bin of the raw material bin and the low-temperature sealing bin.
The working flow of the waste carclazyte pollution-free treatment equipment is as follows: loading an oil-containing waste clay raw material into a raw material bin by a pre-existing loader, and then conveying the oil-containing waste clay raw material into a secondary raw material bin by a raw material screw conveyor and a front-end bucket elevator, wherein the secondary raw material bin can be used as a system feeding buffer to store 2 tons of waste clay raw material; then the low-temperature front-end feeding screw conveyor conveys raw materials into a low-temperature rotary heating furnace at a speed of 1.2 tons to 1.5 tons per hour, and the raw materials are heated to 250 ℃ to 400 ℃ and kept at the temperature for 1 to 2 hours under the inert atmosphere or the vacuum atmosphere in the low-temperature rotary heating furnace to carry out thermal distillation treatment on the waste clay raw materials; after the thermal distillation is finished, the low-temperature discharging screw conveyor feeds the waste clay after the thermal distillation into a lower low-temperature sealing bin at a speed of more than 0.8 ton to 1 ton per hour, and the generated vapor and part of organic matters are discharged from the upper low-temperature sealing bin, treated by a low-temperature condenser and a low-temperature alkaline washing device, and the oil product is recovered to an oil storage device for recycling and burning the combustible gas; feeding the material into a high-temperature rotary heating furnace through a middle screw conveyor and a high-temperature feeding screw conveyor, heating to 360-800 ℃ in a closed air atmosphere or nitrogen atmosphere, and preserving heat for 1-2 hours for calcination treatment; after the calcination is finished, the generated waste gas is discharged through a high-temperature sealing bin, is treated through a high-temperature condenser and a high-temperature alkaline washing device, and oil products are recovered to an oil storage device, and combustible gas is recovered for combustion and utilization; the obtained pollution-free clay is sent to a cooler through a high-temperature discharge screw conveyor at the speed of 0.75 ton per hour, cooled, and then sent to a finished product waiting package through a tail end bucket elevator.
Claims (6)
1. A pollution-free treatment process for waste carclazyte is characterized in that: the method comprises the steps of firstly adopting a low-temperature thermal distillation method to dry and dehydrate the waste clay, treating and recycling moisture and volatile matters generated in the dehydration process, separating oil products in the waste clay after dehydration through a high-temperature calcination method, and treating and recycling the generated oil products to obtain pollution-free clay;
the low-temperature thermal distillation method is to add inert atmosphere or vacuum atmosphere into a low-temperature rotary heating furnace to heat to 250-400 ℃, keep the temperature for 1-2 hours, generate water vapor and partial organic matters, and obtain oil products, waste water and waste gas through condensation and oil-water separation;
the high-temperature calcination method is to heat the waste gas to 360-800 ℃ in a high-temperature rotary heating furnace through airtight air atmosphere or nitrogen atmosphere, keep the temperature for 1-2 hours, and recover the produced oil after condensation and alkali washing treatment.
2. The process for pollution-free treatment of spent bleaching clay according to claim 1, wherein the process comprises the steps of: and the waste gas from the low-temperature rotary heating furnace and the high-temperature rotary heating furnace is subjected to condensation cooling alkaline washing treatment and then is sent to a combustion system for combustion utilization by an induced draft fan.
3. An apparatus for carrying out the process for nuisanceless treatment of spent bleaching earth as defined in claim 1, wherein: the low-temperature rotary heating furnace comprises a low-temperature rotary heating furnace (6) and a high-temperature rotary heating furnace (12), wherein the feeding end of the low-temperature rotary heating furnace (6) is communicated with a raw material bin, the discharging end of the low-temperature rotary heating furnace is communicated with a low-temperature sealing bin (8) through a low-temperature discharging screw conveyor (7), the low-temperature sealing bin is divided into an upper part and a lower part, the upper part of the low-temperature sealing bin is connected with a low-temperature condenser (18) and a low-temperature alkaline washing device (19) through pipelines, the lower part of the low-temperature condenser is connected with an oil storage device (22) through pipelines, and the exhaust port end of the low-temperature alkaline washing device is communicated with a combustion system of the low-temperature rotary heating furnace (6), and the lower part of the low-temperature sealing bin is communicated with an inlet of the high-temperature rotary heating furnace (12); the high-temperature rotary heating furnace is characterized in that a high-temperature sealing bin (11) is connected to the inlet end of the high-temperature rotary heating furnace (12), the high-temperature sealing bin (11) is connected with a high-temperature condenser (20) and a high-temperature alkaline washing device (21) through pipelines, the lower part of the condenser is connected with an oil storage device (22) through pipelines, the exhaust port end of the high-temperature alkaline washing device is communicated with a combustion system of the high-temperature rotary heating furnace (12), and the outlet end of the high-temperature rotary heating furnace (12) is communicated with a cooler (14) through a high-temperature discharge screw conveyor (13);
three temperature sensors are arranged in the low-temperature rotary heating furnace (6) and the high-temperature rotary heating furnace (12); upper, middle and lower material level sensors are arranged in the lower sealing bin of the raw material bin (1) and the lower sealing bin of the low-temperature sealing bin (8).
4. A waste clay pollution-free treatment apparatus according to claim 3, wherein: the feeding port end of the low-temperature rotary heating furnace (6) is connected with a low-temperature feeding screw conveyor (5), the low-temperature feeding screw conveyor (5) is connected with a secondary raw material bin (4), and the secondary raw material bin (4) is communicated with the raw material bin (1) through a front-end bucket elevator (3).
5. A waste clay pollution-free treatment apparatus according to claim 3, wherein: the inlet end of the high-temperature rotary heating furnace (12) and the outlet end of the low-temperature rotary heating furnace (6) are connected with a middle screw conveyor (9), one end of the middle screw conveyor (9) is positioned at the lower part of a lower sealing bin of the low-temperature rotary heating furnace, and the other end of the middle screw conveyor is communicated with the high-temperature feeding screw conveyor.
6. A waste clay pollution-free treatment apparatus according to claim 3, wherein: the inlet end of the high-temperature rotary heating furnace (12) is connected with a high-temperature feeding screw conveyor (10), and a high-temperature sealing bin (11) is communicated above the high-temperature feeding screw conveyor.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710531599.5A CN107189863B (en) | 2017-07-03 | 2017-07-03 | Pollution-free treatment process and equipment for waste carclazyte |
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| CN201710531599.5A CN107189863B (en) | 2017-07-03 | 2017-07-03 | Pollution-free treatment process and equipment for waste carclazyte |
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| CN107189863A CN107189863A (en) | 2017-09-22 |
| CN107189863B true CN107189863B (en) | 2023-05-26 |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111454771A (en) * | 2019-01-18 | 2020-07-28 | 河北鑫德工业设备有限公司 | Waste clay recycling device |
| CN109759016A (en) * | 2019-02-26 | 2019-05-17 | 河南工业大学 | Method of preparation and use for the renewable spent bleaching clay matrix activated carbon of antibiotic in Adsorption water |
| CN111117694A (en) * | 2019-12-11 | 2020-05-08 | 广元市众鑫环保科技有限公司 | Regeneration treatment system and process for waste mineral oil |
| CN113636580B (en) * | 2021-07-21 | 2023-07-25 | 四川金象赛瑞化工股份有限公司 | Clay recycling process |
| CN114479910A (en) * | 2021-12-31 | 2022-05-13 | 内蒙古伊泰煤基新材料研究院有限公司 | Waste clay regeneration method and regeneration device |
| CN115739058A (en) * | 2022-12-22 | 2023-03-07 | 内蒙古伊泰煤基新材料研究院有限公司 | Waste clay continuous regeneration device and method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106811290A (en) * | 2015-11-30 | 2017-06-09 | 周子童 | A kind of spent bleaching clay utilization process |
| CN106635428A (en) * | 2017-02-24 | 2017-05-10 | 兰州石化职业技术学院 | Method and device for extracting oils from oil-containing spent bleaching clay dregs by water slurry heating flash method |
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