CN114873836A - Kitchen slurry oil extraction system and processing method - Google Patents
Kitchen slurry oil extraction system and processing method Download PDFInfo
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- CN114873836A CN114873836A CN202210246298.9A CN202210246298A CN114873836A CN 114873836 A CN114873836 A CN 114873836A CN 202210246298 A CN202210246298 A CN 202210246298A CN 114873836 A CN114873836 A CN 114873836A
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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
- C02F9/00—Multistage treatment of water, waste water or sewage
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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
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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
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/02—Treatment of water, waste water, or sewage by heating
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/38—Treatment of water, waste water, or sewage by centrifugal separation
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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
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/40—Devices for separating or removing fatty or oily substances or similar floating material
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
- C02F2301/04—Flow arrangements
- C02F2301/043—Treatment of partial or bypass streams
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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
- C02F2301/00—General aspects of water treatment
- C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
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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
- C02F2303/00—Specific treatment goals
- C02F2303/10—Energy recovery
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/28—Anaerobic digestion processes
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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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- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Wood Science & Technology (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Physical Water Treatments (AREA)
Abstract
The invention discloses a kitchen slurry oil extraction system and a processing method, wherein the kitchen slurry oil extraction system comprises the following steps: the oil extraction system comprises an oil separation tank, wherein the oil separation tank consists of a tank body A and a tank body B, and a steam ejector is arranged in the oil separation tank; the outside of the tank body is sequentially connected with a delivery pump, a three-phase separation centrifugal machine, a screw conveyor, a slurry tank, a grease buffer tank, a grease delivery pump, a heat exchange pump, a heat exchanger and a reflux circulating pump through pipelines. The invention avoids heat loss caused by heat exchange through the circulating cooling tower, thereby improving the heat utilization rate of the system; through set up the partition wall in oil interceptor, carry out the oil removal in cell body A and handle once more in cell body B to the heat consumption has been reduced.
Description
The technical field is as follows:
the invention relates to a kitchen waste pretreatment process, in particular to a kitchen slurry oil extraction system and a processing method, and belongs to the technical field of environmental engineering kitchen waste treatment.
Background art:
when the kitchen waste is treated in a centralized manner, the common process at present is to carry out anaerobic fermentation treatment after pretreatment, wherein the first step of the main pretreatment process is to firstly remove non-organic matters (mainly plastics, metals, gravels and the like) in the kitchen waste and then obtain oily kitchen organic slurry; secondly, carrying out oil extraction treatment on the kitchen slurry; most of the prior art is kitchen slurry, the kitchen slurry directly enters a three-phase centrifuge for separation and oil extraction, and the problems of large treatment capacity, high power consumption, low heat utilization rate and high steam energy consumption exist.
The invention content is as follows:
the technical problem to be solved by the invention is as follows: the kitchen slurry oil extraction system and the processing technology overcome the defects of the prior art, reduce the amount of materials entering a three-phase separation centrifugal machine, improve the utilization efficiency of heat and reduce heat loss.
The technical scheme adopted by the invention for solving the technical problem is as follows:
a kitchen slurry oil extraction system comprises an oil separation tank, wherein the oil separation tank consists of a tank body A and a tank body B, and a steam ejector is arranged in the oil separation tank; the outer part of the pool body B is sequentially connected with a delivery pump and a three-phase separation centrifugal machine through pipelines, the three-phase separation centrifugal machine is sequentially connected with a screw conveyor, a slurry tank and a grease buffer tank through pipelines, the lower part of the right side of the grease buffer tank is connected with a grease collecting pool through a pipeline, and the pipeline between the grease buffer tank and the grease collecting pool is provided with the grease delivery pump; the slurry tank is connected with a heat exchange pump through a pipeline, the heat exchange pump is connected with a heat exchanger through an overrunning pipeline, the heat exchanger is connected with the anaerobic tank through a pipeline, one side of the tank body A is connected with a backflow circulating pump through a pipeline, and the backflow circulating pump is connected with the heat exchanger through a pipeline.
The steam ejector is two, is provided with one in cell body A and the cell body B respectively, and two steam ejectors pass through the support and set up on the partition wall between two cell bodies.
A partition wall is arranged between the pool body A and the pool body B, a through hole is formed in the upper portion of the partition wall, and a plug is arranged at the end, located in the pool body B, of the through hole.
Guide seats are correspondingly arranged on two sides of the top of the tank body B respectively, a displacement frame penetrates through the guide seats, and the displacement frame is connected with the guide seats in a sliding manner; the lower part of the middle part of the left side of the displacement frame is provided with a vertical plate, and the lower part of the vertical plate is provided with a plug which is distributed in a conical shape.
And stirrers are respectively arranged in the tank body B and the slurry tank.
The processing method of the kitchen slurry oil extraction system comprises the following steps:
s1: pouring the kitchen waste slurry into the tank body A, wherein the amount of the slurry exceeds the position of the through hole on the partition wall, raising the temperature of the slurry in the tank body A to 45 ℃, and standing for 20 minutes to obtain the slurry A;
s2: pushing the displacement frame to move the plug and the plug away from the through hole, so that the slurry A flows into the tank body B along the through hole; heating the slurry in the tank body B to 90 degrees to obtain slurry B;
s3: solid slag generated after entering a three-phase separation centrifugal machine enters a screw conveyer to be delivered outside, generated grease enters a grease buffer tank and is delivered outside through a grease conveying pump, generated water enters a slurry tank and is subjected to heat exchange through a heat exchange pump and a reflux circulating pump, and finally generated slurry C enters a tank body A.
The temperature in the slurry tank is 85 ℃, the temperature in the reflux circulating pump is 40 ℃, and the temperature in the anaerobic tank is 35 ℃.
The invention has the following positive beneficial effects:
1. when the oil separation tank is used, slurry is firstly led into the tank body A, oil separation treatment is carried out at the temperature of 45 ℃, upper grease enters the tank body B through the through hole, and the slurry in the tank body B is heated to 90 ℃ and then extracted, so that the heat consumption can be greatly reduced.
2. According to the invention, the heat exchanger is arranged, so that the slurry after oil extraction of the three-phase separation centrifuge enters the slurry tank and then exchanges heat with the reflux circulating pump through the heat exchange pump, wherein the reflux circulating pump is used for carrying out reflux washing on the first step of kitchen treatment by utilizing the water phase after oil separation, so that grease in the kitchen flows into the oil separation tank after entering the liquid phase as completely as possible; because the temperature of the slurry in the slurry tank is 85 ℃, the subsequent anaerobic temperature needs to be reduced at 35 ℃, the temperature of the liquid in the reflux circulating pump is reduced to 40 ℃ after the liquid is washed by the liquid, the heat exchanger is adopted to heat the slurry at the outlet of the reflux circulating pump, the temperature reduction of the slurry in the slurry pipe and the temperature rise of the slurry at the outlet of the reflux circulating pump are realized simultaneously, the internal circulation of heat is realized, the heat loss caused by the heat exchange of a circulating cooling tower arranged in the slurry tank in the traditional process is avoided, and the heat utilization rate of the system is improved.
Description of the drawings:
FIG. 1 is a schematic structural view of the present invention;
fig. 2 is a schematic structural view of the displacement bracket and the block of the present invention.
The specific implementation mode is as follows:
the invention will be further explained and explained with reference to the drawings, in which:
example 1: referring to fig. 1-2, a kitchen slurry oil extraction system comprises an oil separation tank 1, wherein the oil separation tank 1 is composed of a tank body a and a tank body B, and a steam ejector 2 is arranged in the oil separation tank 1; the outside of the pool body B is sequentially connected with a delivery pump 3 and a three-phase separation centrifugal machine 6 through pipelines, the three-phase separation centrifugal machine 6 is sequentially connected with a screw conveyor 9, a slurry tank 7 and a grease buffer tank 10 through pipelines, the lower part of the right side of the grease buffer tank 10 is connected with a grease collecting pool through a pipeline, and a grease delivery pump 11 is arranged on the pipeline between the grease buffer tank 10 and the grease collecting pool; slurry tank 7 is connected with heat exchange pump 8 through the pipeline, and heat exchange pump 8 is connected with heat exchanger 4 through the pipeline, and heat exchanger 4 is connected with the anaerobic jar through surmounting the pipeline, and there is backflow circulating pump 5 one side of cell body A through the pipe connection, and backflow circulating pump 5 links together through pipeline and heat exchanger 4.
Two steam ejectors 2 are arranged, one is respectively arranged in the tank body A and the tank body B, and the two steam ejectors 2 are arranged on a partition wall 101 between the two tank bodies through a support.
A partition wall 101 is arranged between the tank body A and the tank body B, a through hole 102 is arranged at the upper part of the partition wall 101, and a plug 106 is arranged at the end of the through hole in the tank body B.
The tank body B and the slurry tank 7 are respectively provided with a stirrer 12.
In the above description, the small end of the plug has a size smaller than that of the through-hole, but the large end of the plug has a size larger than that of the through-hole.
In the above description, the steam ejector 2 is provided with a temperature and automatic valve interlocking regulation control system for regulating the temperature in the tank body.
In the above description, the slurry is provided to the rear anaerobic fermentor beyond the pipeline when entering the heat exchanger pump and entering the heat exchanger through the pipeline.
Through a plurality of experiments, we know that: if not set up the oil interceptor and then need to eat kitchen thick liquid and all heat to 90 ℃ and set up the difference of partition wall and be: oil separation treatment is carried out at the temperature of 45 ℃ in the tank body 1 by arranging an oil separation tank, slurry in the tank body A is heated by a steam ejector, grease on the upper part enters the tank body B through overflow, the liquid in the tank body B is heated to 90 ℃ by the steam ejector and then enters a three-phase separation centrifugal machine, and then grease extraction is carried out; the oil content of 100 tons of slurry entering the tank body 1 is 3 percent, the oil content of the slurry entering the tank body 2 can reach 20 percent, the kitchen slurry of the direct three-phase separation centrifugal machine 6 is 15 tons, and compared with the slurry which needs to be heated to 90 ℃ and enters the three-phase separation centrifugal machine, the kitchen slurry is reduced by 85 tons, so that the heat consumption is greatly reduced.
Example 2: the processing method of the kitchen slurry oil extraction system comprises the following steps:
s1: pouring kitchen waste slurry into the tank body A, wherein the amount of the slurry exceeds the position of the through hole 102 in the partition wall 101, and heating the slurry by using a steam ejector 2 in the tank body A until the temperature in the tank rises to 45 degrees, and standing the tank for 20 minutes to obtain slurry A;
s2: pushing the displacement frame 104 to move the plug 106 away from the through hole, so that the slurry A flows into the tank body B along the through hole; heating by a steam ejector 2 in the tank body B until the temperature of the serous fluid A in the tank rises to 90 degrees to obtain serous fluid B;
s3: solid slag generated after entering a three-phase separation centrifugal machine 6 enters a screw conveyor 9 to be conveyed outside, generated grease enters a grease buffer tank 10 and is conveyed outside through a grease conveying pump 11, generated water enters a slurry tank 7 and is subjected to heat exchange through a heat exchange pump 8 and a reflux circulating pump 5, and finally generated slurry C enters a tank body A.
Wherein: the temperature in the slurry tank 7 was 85 ℃, the temperature in the reflux circulation pump 5 was 40 ℃, and the temperature in the anaerobic tank was 35 ℃.
In the above description, the reflux circulation pump is connected to the pipes between the left side of the heat exchange pump and the right side of the heat exchanger through the pipes, and the branch pipes are provided outside the pipes between the heat exchange pump and the heat exchanger and connected to the heat exchanger.
In the above description, the heat exchanger is arranged, the slurry after oil extraction of the three-phase separation centrifuge 6 enters the slurry tank 7, and then heat exchange is performed between the heat exchanger 8 and the slurry at the outlet of the reflux circulation pump 5 arranged in the oil separation tank 1, wherein the reflux circulation pump 5 is used for performing reflux flushing on the first step of kitchen treatment by using the water phase after oil separation, so that the grease in the kitchen flows into the oil separation tank after entering the liquid phase as completely as possible. Because the temperature of the slurry in the slurry tank 7 is 85 ℃, the subsequent anaerobic temperature needs to be reduced at 35 ℃, the temperature of the liquid in the reflux circulating pump 5 is reduced to 40 ℃ after the liquid is washed by a flushing process, the heat exchanger is adopted to heat the slurry at the outlet of the reflux circulating pump 5, the temperature reduction of the slurry in the slurry tank 7 and the temperature rise of the slurry at the outlet of the reflux circulating pump 5 are realized simultaneously, the thermal internal circulation is realized, the heat loss caused by the heat exchange of a circulating cooling tower arranged on the slurry tank 7 is avoided, and the heat utilization rate of the system is improved.
The invention avoids the heat loss caused by heat exchange through the circulating cooling tower, thereby improving the heat utilization rate of the system; through set up the partition wall in oil interceptor, carry out the oil removal in cell body A and handle once more in cell body B to the heat consumption has been reduced.
Claims (7)
1. The utility model provides a meal kitchen thick liquid system of extracting oil, includes oil interceptor (1), its characterized in that: the oil separation tank (1) consists of a tank body A and a tank body B, and a steam ejector (2) is arranged in the oil separation tank (1); the device is characterized in that the outside of the pool body (B) is sequentially connected with a delivery pump (3) and a three-phase separation centrifugal machine (6) through pipelines, the three-phase separation centrifugal machine (6) is sequentially connected with a screw conveyor (9), a slurry tank (7) and a grease buffer tank (10) through pipelines, the lower part of the right side of the grease buffer tank (10) is connected with a grease collecting pool through a pipeline, and a grease delivery pump (11) is arranged on the pipeline between the grease buffer tank (10) and the grease collecting pool; the slurry tank (7) is connected with a heat exchange pump (8) through a pipeline, the heat exchange pump (8) is connected with a heat exchanger (4) through a pipeline, the heat exchanger (4) is connected with an anaerobic tank through an overrunning pipeline, one side of the tank body A is connected with a backflow circulating pump (5) through a pipeline, and the backflow circulating pump (5) is connected with the heat exchanger (4) through a pipeline.
2. The kitchen slurry oil extraction system according to claim 1, characterized in that: the number of the steam ejectors (2) is two, one steam ejector (2) is respectively arranged in the tank body A and the tank body B, and the two steam ejectors (2) are arranged on a partition wall (101) between the two tank bodies through a support.
3. The kitchen slurry oil extraction system according to claim 1, characterized in that: a partition wall (101) is arranged between the pool body A and the pool body B, a through hole (102) is arranged at the upper part of the partition wall (101), and a plug (106) is arranged at the end of the through hole positioned in the pool body B.
4. The kitchen slurry oil extraction system according to claim 3, characterized in that: guide seats (103) are correspondingly arranged on two sides of the top of the pool body B respectively, a displacement frame (104) penetrates through the guide seats (103), and the displacement frame (104) is connected with the guide seats (103) in a sliding manner; a vertical plate (105) is arranged below the middle part of the left side of the displacement frame (104), and plugs (106) are arranged below the vertical plate (105), wherein the plugs (106) are distributed in a conical shape.
5. The kitchen slurry oil extraction system according to claim 1, characterized in that: and stirrers (12) are respectively arranged in the tank body B and the slurry tank (7).
6. The processing method of the kitchen slurry oil extraction system, which is disclosed by the claims 1-5, is characterized by comprising the following steps of:
s1: pouring kitchen waste slurry into the tank body A, wherein the slurry amount exceeds the position of a through hole (102) in a partition wall (101), and heating by a steam ejector (2) in the tank body A until the temperature in the tank rises to 45 ℃, and standing for 20 minutes to obtain slurry A;
s2: pushing the displacement frame (104) to move the plug (106) away from the through hole, so that the slurry A flows into the tank body B along the through hole; heating by a steam ejector (2) in the tank body B until the temperature of the serous fluid A in the tank rises to 90 degrees to obtain serous fluid B;
s3: solid slag generated after entering a three-phase separation centrifugal machine (6) enters a screw conveyor (9) to be conveyed outside, generated grease enters a grease buffer tank (10) and is conveyed outside through a grease conveying pump (11), generated water enters a slurry tank (7) and is subjected to heat exchange through a heat exchange pump (8) and a reflux circulating pump (5), and finally generated slurry C enters a tank body A.
7. The processing method of the kitchen slurry oil extraction system according to claim 6, characterized by comprising the following steps: the temperature in the slurry tank (7) is 85 ℃, the temperature in the reflux circulating pump (5) is 40 ℃, and the temperature in the anaerobic tank is 35 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210246298.9A CN114873836A (en) | 2022-03-14 | 2022-03-14 | Kitchen slurry oil extraction system and processing method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210246298.9A CN114873836A (en) | 2022-03-14 | 2022-03-14 | Kitchen slurry oil extraction system and processing method |
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| Publication Number | Publication Date |
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| CN114873836A true CN114873836A (en) | 2022-08-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202210246298.9A Pending CN114873836A (en) | 2022-03-14 | 2022-03-14 | Kitchen slurry oil extraction system and processing method |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6315903B1 (en) * | 2000-03-24 | 2001-11-13 | Downstream Environmental, Llc | Method for processing liquid waste |
| CN103785671A (en) * | 2014-01-27 | 2014-05-14 | 普拉克环保***（北京）有限公司 | Oil recovery system and method used for kitchen waste treatment |
| CN111099781A (en) * | 2019-12-31 | 2020-05-05 | 北京嘉博文生物科技有限公司 | Pretreatment device and method for kitchen waste leachate |
| CN112608006A (en) * | 2020-12-14 | 2021-04-06 | 中国市政工程华北设计研究总院有限公司 | System for cooperative treatment of food waste and municipal sludge and operation process |
| CN213436277U (en) * | 2020-09-22 | 2021-06-15 | 苏州恺利尔环保科技有限公司 | Kitchen waste washing pretreatment system |
| CN114085013A (en) * | 2022-01-21 | 2022-02-25 | 北京中源创能工程技术有限公司 | A multistage preprocessing device for kitchen garbage high concentration waste water |
-
2022
- 2022-03-14 CN CN202210246298.9A patent/CN114873836A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6315903B1 (en) * | 2000-03-24 | 2001-11-13 | Downstream Environmental, Llc | Method for processing liquid waste |
| CN103785671A (en) * | 2014-01-27 | 2014-05-14 | 普拉克环保***（北京）有限公司 | Oil recovery system and method used for kitchen waste treatment |
| CN111099781A (en) * | 2019-12-31 | 2020-05-05 | 北京嘉博文生物科技有限公司 | Pretreatment device and method for kitchen waste leachate |
| CN213436277U (en) * | 2020-09-22 | 2021-06-15 | 苏州恺利尔环保科技有限公司 | Kitchen waste washing pretreatment system |
| CN112608006A (en) * | 2020-12-14 | 2021-04-06 | 中国市政工程华北设计研究总院有限公司 | System for cooperative treatment of food waste and municipal sludge and operation process |
| CN114085013A (en) * | 2022-01-21 | 2022-02-25 | 北京中源创能工程技术有限公司 | A multistage preprocessing device for kitchen garbage high concentration waste water |
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