阅读说明：本技术 餐厨废弃油脂自动化粗精二次分离装置及其提纯工艺 (Automatic coarse-fine secondary separation device for kitchen waste grease and purification process thereof ) 是由 陈鑫 任杰 李洋洋 陈涛 于 2019-06-13 设计创作，主要内容包括：本发明提供了一种餐厨废弃油脂自动化粗精二次分离装置,它解决了餐厨废弃油脂分离不佳的问题。本餐厨废弃油脂自动化粗精二次分离装置包括：粗分离罐,容纳有粗油脂,内部设置第一加热器,粗分离罐底部安装一级排油阀、一级排水阀、一级排渣阀,密度计分别控制一级排油阀、一级排水阀、一级排渣阀的开启与关闭；精分离罐,接收由一级排油阀输出的油脂,安装搅拌器,环绕搅拌器设置第二加热器,精分离罐底部安装二级排油阀、二级排水阀,第一电导率检测仪控制二级排油阀、二级排水阀的开启与关闭；成品油罐,接收由二级排油阀输出的油脂,进一步向外输送。本发明具有分离效果好的特点。本发明还公开了一种餐厨废弃油脂自动化粗精二次分离提纯工艺。(The invention provides an automatic coarse-fine secondary separation device for kitchen waste grease, which solves the problem of poor separation of the kitchen waste grease. This meal kitchen waste grease automatic coarse and fine secondary separation device includes: the crude separation tank contains crude grease, a first heater is arranged in the crude separation tank, a first-stage oil discharge valve, a first-stage water discharge valve and a first-stage slag discharge valve are arranged at the bottom of the crude separation tank, and a densimeter controls the opening and closing of the first-stage oil discharge valve, the first-stage water discharge valve and the first-stage slag discharge valve respectively; the fine separation tank is used for receiving the grease output by the primary oil discharge valve, a stirrer is installed, a second heater is arranged around the stirrer, a secondary oil discharge valve and a secondary water discharge valve are installed at the bottom of the fine separation tank, and the first conductivity detector controls the opening and closing of the secondary oil discharge valve and the secondary water discharge valve; and the finished oil tank is used for receiving the grease output by the secondary oil discharge valve and further conveying the grease outwards. The invention has the characteristic of good separation effect. The invention also discloses an automatic coarse-fine secondary separation and purification process for the kitchen waste oil.)

1. The utility model provides an automatic coarse and fine secondary separator of meal kitchen discarded grease which characterized in that includes:

the top and the bottom of the coarse separation tank are respectively provided with a first feed inlet and a first discharge outlet, coarse grease is contained in the coarse separation tank, a first heater is arranged in the coarse separation tank, the bottom of the coarse separation tank is provided with a first-stage oil discharge valve, a first-stage drain valve and a first-stage slag discharge valve, and the first discharge outlet is also provided with a densimeter which can respectively control the opening and closing of the first-stage oil discharge valve, the first-stage drain valve and the first-stage slag discharge valve;

the top and the bottom of the fine separation tank are respectively provided with a second feeding hole and a second discharging hole, the second feeding hole can receive grease output by the primary oil discharge valve, a stirrer is arranged in the fine separation tank, a second heater is arranged around the stirrer, the bottom of the fine separation tank is provided with a secondary oil discharge valve and a secondary water discharge valve, a first conductivity detector is arranged at the second discharging hole and can control the opening and closing of the secondary oil discharge valve and the secondary water discharge valve;

and the top and the bottom of the finished oil tank are respectively provided with a third feed port and a third discharge port, the third feed port can receive the grease output by the secondary oil drain valve, and the grease is further conveyed outwards from the third discharge port.

2. The automatic coarse-fine secondary separation device for the kitchen waste grease as claimed in claim 1, wherein a feed pump is installed on one side of the coarse separation tank, and the first feed port is communicated with the feed pump through a material valve.

3. The automatic coarse and fine secondary separation device for the kitchen waste oil and fat as claimed in claim 1, characterized in that a feed pump and a feed valve are sequentially connected to the secondary oil drain valve, the feed valve is communicated with a finished oil tank and the feed valve is communicated with the fine separation tank through a primary reflux valve.

4. The automatic coarse and fine secondary separation device for the kitchen waste grease, as recited in claim 1, characterized in that temperature transmitters are respectively installed at the bottoms of the coarse separation tank and the fine separation tank, the first heater and the second heater are respectively externally connected with steam valves, and each steam valve is connected with a corresponding temperature transmitter.

5. The automatic coarse-fine secondary separation device for the kitchen waste grease as claimed in claim 1, wherein an external delivery valve and an external delivery pump are sequentially arranged at the third discharge port, a three-stage oil discharge valve and a three-stage drain valve are connected to the external delivery pump, and a second conductivity detector is arranged between the external delivery valve and the external delivery pump and can control the opening or closing of the three-stage oil discharge valve and the three-stage drain valve.

6. The automatic coarse-fine secondary separation device for the kitchen waste grease as claimed in claim 5, wherein a secondary reflux valve is further connected to the external delivery pump and is communicated with a finished oil tank.

7. The automatic coarse-fine secondary separation device for the kitchen waste grease as claimed in claim 1, wherein an auxiliary valve is further installed at the bottom of the finished product oil tank, the auxiliary valve is located below the outward conveying valve, and the auxiliary valve is communicated with the outward conveying pump.

8. The automatic coarse-fine secondary separation and purification process for the kitchen waste oil is characterized by comprising the following steps of:

conveying the crude oil into a crude separation tank through a feeding pump, feeding back information through a material level switch at a first feeding port when the tank is full, closing a material valve, and stopping conveying by the feeding pump;

opening a steam valve on the first heater, allowing steam to enter the first heater to heat crude grease, standing and layering the crude grease, and outputting the crude grease outwards through a first discharge port;

the densimeter detects the density of the grease component output by the first discharge port and controls to open a first-stage slag discharge valve or a first-stage drain valve or a first-stage oil discharge valve;

the oil output by the first-stage oil discharge valve enters the fine separation tank from the second feed port, and when the tank is full, the material level switch at the second feed port feeds back information, so that the oil stops being input;

opening a steam valve on the second heater, allowing steam to enter the second heater to heat the grease, allowing a stirrer to work to stir the grease, and allowing the grease to stand for layering and then outputting the grease outwards through a second discharge hole;

the first conductivity detector detects the conductivity of the grease component output by the second discharge port and controls to open the second-stage drain valve or the second-stage oil drain valve;

the feeding pump conveys the grease output by the secondary oil discharge valve to the feeding valve and further conveys the grease into a finished oil tank, and when the tank is full, a material level switch at a third feeding port feeds back information, and the grease stops being input;

after standing in the finished oil tank, the grease is conveyed outwards through a third discharge hole, an external conveying valve, an external conveying pump and a three-stage oil discharge valve in sequence;

and the second conductivity detector detects the conductivity of the grease component output by the feed valve and controls the opening of the three-stage drain valve or the three-stage oil drain valve.

9. The automatic coarse and fine secondary separation and purification process for the kitchen waste oil and fat as claimed in claim 8, characterized in that the seventh step further comprises a primary oil and fat reflux operation, wherein the oil and fat reflux to the fine separation tank through a feed valve and a primary reflux valve.

10. The automatic coarse-fine secondary separation and purification process for the kitchen waste oil according to claim 8, characterized by further comprising a secondary reflux operation of the oil in the eighth step, wherein the oil is refluxed to a finished oil tank through an external delivery pump and a secondary reflux valve.

Technical Field

The invention belongs to the technical field of environmental protection detection, and relates to an automatic coarse-fine secondary separation device for kitchen waste grease.

Background

Kitchen waste grease, which refers to various inferior oils existing in life, such as recovered edible oil, repeatedly used frying oil and the like, mainly comes from kitchen waste treatment (kitchen waste treatment), namely oily floating materials in a sewer or oil obtained by simply processing and refining leftovers, leftovers and the like of hotels and restaurants.

The oil return dining table can cause great harm to human bodies, so that the aims of solving urban kitchen waste fundamentally, saving energy, reducing emission and recycling waste are fulfilled, the harmless treatment and recycling technology of the kitchen waste must be deeply researched, the resource recovery efficiency and the product attached value are greatly improved, the kitchen waste is recycled, and waste is changed into valuable.

However, the existing equipment for treating the kitchen waste oil usually performs solid-liquid-oil three-phase separation on the kitchen waste oil, most of operations need manual operation, the automation degree is low, the problems of roof fall, uneven heating, no reference for layered discharge of oil, water and slag and the like often occur, and the problem of non-ideal treatment effect of the kitchen waste oil is easy to occur; in addition, different devices need to be converted in the manual operation process, peculiar smell is easily emitted, the air environment is affected, and long-term operation is not facilitated.

In summary, in order to solve the technical problems of the existing kitchen waste oil treatment, the invention designs the automatic coarse and fine secondary separation device for the kitchen waste oil, which is reasonable in arrangement and good in separation effect.

Disclosure of Invention

The invention provides an automatic coarse-fine secondary separation device for waste kitchen grease, which is reasonable in arrangement and good in separation effect and solves the problems in the prior art.

The purpose of the invention can be realized by the following technical scheme: the utility model provides an automatic coarse and fine secondary separator of meal kitchen discarded grease, includes:

the top and the bottom of the coarse separation tank are respectively provided with a first feed inlet and a first discharge outlet, coarse grease is contained in the coarse separation tank, a first heater is arranged in the coarse separation tank, the bottom of the coarse separation tank is provided with a first-stage oil discharge valve, a first-stage drain valve and a first-stage slag discharge valve, and the first discharge outlet is also provided with a densimeter which can respectively control the opening and closing of the first-stage oil discharge valve, the first-stage drain valve and the first-stage slag discharge valve;

the top and the bottom of the fine separation tank are respectively provided with a second feeding hole and a second discharging hole, the second feeding hole can receive grease output by the primary oil discharge valve, a stirrer is arranged in the fine separation tank, a second heater is arranged around the stirrer, the bottom of the fine separation tank is provided with a secondary oil discharge valve and a secondary water discharge valve, a first conductivity detector is arranged at the second discharging hole and can control the opening and closing of the secondary oil discharge valve and the secondary water discharge valve;

and the top and the bottom of the finished oil tank are respectively provided with a third feed port and a third discharge port, the third feed port can receive the grease output by the secondary oil drain valve, and the grease is further conveyed outwards from the third discharge port.

As a further improvement of the scheme, a feeding pump is installed on one side of the rough separation tank, and the first feeding port is communicated with the feeding pump through a material valve.

As a further improvement of the scheme, a feeding pump and a feeding valve are sequentially connected to the secondary oil discharge valve, the feeding valve is communicated with the finished oil tank, and the feeding valve is communicated with the fine separation tank through a primary reflux valve.

As a further improvement of the scheme, temperature transmitters are arranged at the bottoms of the rough separation tank and the fine separation tank, steam valves are externally connected to the first heater and the second heater respectively, and each steam valve is connected with the corresponding temperature transmitter.

As another improvement of the scheme, an external delivery valve and an external delivery pump are sequentially arranged at the third discharge port, the external delivery pump is connected with a three-stage oil discharge valve and a three-stage water discharge valve, and a second conductivity detector is arranged between the external delivery valve and the external delivery pump and can control the opening or closing of the three-stage oil discharge valve and the three-stage water discharge valve.

As a further improvement of the scheme, the external delivery pump is also connected with a secondary return valve which is communicated with the finished oil tank.

As a further improvement of the scheme, the bottom of the finished oil tank is also provided with an auxiliary valve which is positioned below the output valve and is communicated with the output pump.

As a further improvement of the scheme, material level switches are respectively arranged at the first feeding hole, the second feeding hole and the third feeding hole.

An automatic coarse-fine secondary separation and purification process for kitchen waste oil comprises the following specific steps:

conveying the crude oil into a crude separation tank through a feeding pump, feeding back information through a material level switch at a first feeding port when the tank is full, closing a material valve, and stopping conveying by the feeding pump;

opening a steam valve on the first heater, allowing steam to enter the first heater to heat crude grease, standing and layering the crude grease, and outputting the crude grease outwards through a first discharge port;

the densimeter detects the density of the grease component output by the first discharge port and controls to open a first-stage slag discharge valve or a first-stage drain valve or a first-stage oil discharge valve;

the oil output by the first-stage oil discharge valve enters the fine separation tank from the second feed port, and when the tank is full, the material level switch at the second feed port feeds back information, so that the oil stops being input;

opening a steam valve on the second heater, allowing steam to enter the second heater to heat the grease, allowing a stirrer to work to stir the grease, and allowing the grease to stand for layering and then outputting the grease outwards through a second discharge hole;

the first conductivity detector detects the conductivity of the grease component output by the second discharge port and controls to open the second-stage drain valve or the second-stage oil drain valve;

the feeding pump conveys the grease output by the secondary oil discharge valve to the feeding valve and further conveys the grease into a finished oil tank, and when the tank is full, a material level switch at a third feeding port feeds back information, and the grease stops being input;

after standing in the finished oil tank, the grease is conveyed outwards through a third discharge hole, an external conveying valve, an external conveying pump and a three-stage oil discharge valve in sequence;

and the second conductivity detector detects the conductivity of the grease component output by the feed valve and controls the opening of the three-stage drain valve or the three-stage oil drain valve.

As a further improvement of the scheme, the seventh step also comprises a first-stage backflow operation of the grease, and the grease flows back to the fine separation tank through the feeding valve and the first-stage backflow valve.

As a further improvement of the scheme, step eight also comprises a secondary backflow operation of the grease, and the grease flows back to the finished product oil tank through the external delivery pump and the secondary backflow valve.

Compared with the prior art, the kitchen waste oil recovery device is reasonable in structural arrangement, and through the matched use of the rough separation tank, the fine separation tank and the finished oil tank, the kitchen waste oil is subjected to rough and fine secondary separation and purification, so that the recovery rate of the kitchen waste oil is improved, and the resource recycling is facilitated; the density meter and the conductivity detector can enhance the separation effect of the kitchen waste grease, and the purification rate is high; in addition, through material level on-off control feeding, temperature transmitter cooperation steam heating system and automatic valve switch etc. carry out long-range automatic chain operation such as digital signal acquisition and processing, degree of automation is high, and the treatment effect is obvious, realizes the automated control that the discarded grease of kitchen handled.

Drawings

Fig. 1 is a schematic structural view of the present invention.

FIG. 2 is a schematic view of the construction of the crude separation tank of the present invention.

FIG. 3 is a schematic diagram of the fine separation tank of the present invention.

Fig. 4 is a schematic structural diagram of the product oil tank of the present invention.

In the figure, 10, a crude separation tank; 11. a first feed port; 12. a first discharge port; 13. a first heater; 14. a primary oil drain valve; 15. a first-stage drain valve; 16. a first-stage slag discharge valve; 17. a densitometer; 20. a fine separation tank; 21. a second feed port; 22. a second discharge port; 23. a second heater; 24. a secondary oil drain valve; 25. a second stage drain valve; 26. a stirrer; 27. a first conductivity detector; 30. a finished oil tank; 31. A third feed inlet; 32. a third discharge port; 33. a second conductivity detector; 34. a third-stage oil drain valve; 35. a three-stage drain valve; 41. a charge pump; 42. a feed pump; 43. an output pump; 51. a material valve; 52. a feed valve; 53. an output valve; 54. an auxiliary valve; 61. a primary reflux valve; 62. a secondary reflux valve; 70. a temperature transmitter; 80. a steam valve; 90. a material level switch.

Detailed Description

The technical solution of the present invention is further described below with reference to the following embodiments and the accompanying drawings.

As shown in fig. 1, this automatic coarse and fine secondary separator of meal kitchen waste grease includes:

the system comprises a coarse separation tank 10, a first feed inlet 11 and a first discharge outlet 12 are respectively formed in the top and the bottom of the coarse separation tank 10, coarse grease is contained in the coarse separation tank 10, a first heater 13 is arranged in the coarse separation tank 10, a first-stage oil discharge valve 14, a first-stage drain valve 15 and a first-stage slag discharge valve 16 are arranged at the bottom of the coarse separation tank 10, a densimeter 17 is further arranged at the first discharge outlet 12, and the densimeter 17 can respectively control the opening and closing of the first-stage oil discharge valve 14, the first-stage drain valve 15 and the first-stage slag discharge valve 16;

a second feed inlet 21 and a second discharge outlet 22 are respectively formed in the top and the bottom of the fine separation tank 20, the second feed inlet 21 can receive the grease output by the primary oil discharge valve 14, a stirrer 26 is installed in the fine separation tank 20, a second heater 23 is arranged around the stirrer 26, a secondary oil discharge valve 24 and a secondary water discharge valve 25 are installed at the bottom of the fine separation tank 20, a first conductivity detector 27 is arranged at the second discharge outlet 22, and the first conductivity detector 27 can control the opening and closing of the secondary oil discharge valve 24 and the secondary water discharge valve 25;

the top and the bottom of the product oil tank 30 are respectively provided with a third feed port 31 and a third discharge port 32, the third feed port 31 can receive the grease output by the second-stage oil drain valve 24, and the grease is further conveyed outwards from the third discharge port 32.

Most of the existing equipment for treating the kitchen waste grease needs manual operation, has low automation degree, often has the problems of roof fall, uneven heating, no reference for layered discharge of oil, water and slag and the like, and easily has the problem of unsatisfactory treatment effect of the kitchen waste grease; in addition, different devices need to be converted in the manual operation process, peculiar smell is easily emitted, the air environment is affected, and long-term operation is not facilitated.

Therefore, the invention provides an automatic coarse-fine secondary separation device for kitchen waste oil, which is used for performing coarse-fine secondary separation and purification on the kitchen waste oil through the cooperation of the coarse separation tank 10, the fine separation tank 20 and the product oil tank 30, so that the recovery rate of the kitchen waste oil is improved, meanwhile, an automatic valve switch is adopted for performing remote automatic interlocking operation, the degree of automation is high, the treatment effect is obvious, and the automatic control of the treatment of the kitchen waste oil is realized.

Specifically, the crude oil obtained after the kitchen waste oil is subjected to impurity removal is input into a crude separation tank 10 to be subjected to preliminary separation of oil, water and slag, the crude oil is kept stand in the crude separation tank 10 and then forms three layers of solid matter, water and oil from bottom to top, when the crude oil is output to a first discharge port 12, density real-time detection and judgment are performed on output substances through a densimeter 17, and corresponding solid matter, water and oil are sequentially output by controlling a first-stage residue discharge valve 16, a first-stage drain valve 15 and a first-stage oil discharge valve 14 according to different densities.

Grease of one-level oil drain valve 14 output further gets into smart knockout drum 20 and carries out the secondary separation work of oil, water, carries out intensive mixing heating to the grease in the smart knockout drum 20, and the grease stews the back and forms two-layer upper and lower material, when exporting to second discharge gate 22, adopts first conductivity detector 27 to carry out the measuring of conductivity to the output material, and the accuracy is higher, according to the difference of water and grease conductivity, controls second grade drain valve 25, second grade drain valve 24 and exports water, grease in proper order.

The grease output by the secondary oil drain valve 24 enters the finished product oil tank 30 for storage and is finally output outwards for reuse.

As shown in fig. 2 and 3, it is preferable that a feed pump 41 is installed at one side of the rough separation tank 10, and the first feed port 11 is communicated with the feed pump 41 through a material valve 51. Wherein the crude oil enters the crude separation tank 10 under the power of the feed pump 41, and a material valve 51 is arranged at the first feed port 11, so that the input of the crude oil is convenient to control.

Further, the feed pump 42 and the feed valve 52 are sequentially connected to the secondary oil drain valve 24, the feed valve 52 is communicated with the product oil tank 30, and the feed valve 52 is communicated with the fine separation tank 20 through the primary reflux valve 61.

The output of the interior grease of smart knockout drum 20 is actually provided power by feed pump 42, the drive grease gets into finished product oil tank 30 through feed valve 52, preferred feed valve 52 in this embodiment communicates with smart knockout drum 20 through one-level return valve 61, the grease carries certain time or a certain amount back toward finished product oil tank 30, for guaranteeing the purity of output grease, can flow back to smart knockout drum 20 through one-level return valve 61, further separate, in the time of the actual work, can pass through the time switch of program control one-level return valve 61, also can pass through the work of manual control one-level return valve 61, can specifically operate according to the production effect of reality, do not injectly here.

Preferably, temperature transmitters 70 are installed at the bottoms of the rough separation tank 10 and the fine separation tank 20, steam valves 80 are externally connected to the first heater 13 and the second heater 23, and each steam valve 80 is connected to the corresponding temperature transmitter 70.

When separating grease, for the effect of guaranteeing the separation, set up the heater respectively in two knockout drums, heat grease through steam valve 80 input steam simultaneously, the preferred every knockout drum bottom of this place all sets up temperature transmitter 70, and when the temperature reachd the certain limit, control steam valve 80 stopped to carry steam, real-time control, excellent in use effect and degree of automation height.

As shown in fig. 4, an external delivery valve 53 and an external delivery pump 43 are sequentially disposed at the third discharge port 32, a three-stage oil drain valve 34 and a three-stage water drain valve 35 are connected to the external delivery pump 43, and a second conductivity detector 33 is installed between the external delivery valve 53 and the external delivery pump 43, wherein the second conductivity detector 33 can control the opening or closing of the three-stage oil drain valve 34 and the three-stage water drain valve 35.

The external conveying pump 43 works to drive the grease to be conveyed outwards through the external conveying valve 53, the external conveying pump 43 and the three-stage oil discharge valve 34, the output substance is detected by the second conductivity detector 33 in the process to ensure the purity of the output grease, if the content of more water is detected, the three-stage drain valve 35 is controlled to be opened, otherwise, the grease is output through the three-stage oil discharge valve 34 to obtain the purified grease.

Preferably, a secondary return valve 62 is also connected to the external delivery pump 43, and the secondary return valve 62 is in communication with the product tank 30. The secondary reflux valve 62 is arranged, so that in the process of outward conveying of the grease, the output grease can be controlled to reflux to the finished product oil tank 30 for further sedimentation, the purity of the output grease is ensured, and the reflux operation is carried out according to the requirement of set time or output quantity during actual work.

Preferably, the bottom of the product oil tank 30 is also provided with an auxiliary valve 54, the auxiliary valve 54 is positioned below the output valve 53, and the auxiliary valve 54 is communicated with the output pump 43.

It is worth mentioning that, supplementary discharge gate has still been seted up to product oil tank 30 bottom third discharge gate 32 below, set up auxiliary valve 54 in supplementary discharge gate department, the interior high-order grease of product oil tank 30 passes through third discharge gate 32, outer defeated valve 53, outer defeated pump 43 is outwards carried, after a period of use, can deposit some remaining substances in the product oil tank 30, then can pass through supplementary discharge gate this moment, auxiliary valve 54, outer defeated pump 43 is outwards carried, can ensure the purity of output grease on the one hand, on the other hand is convenient for the washing of product oil tank 30, excellent in use effect.

As shown in fig. 2 to 4, a level switch 90 is respectively installed at the first feed opening 11, the second feed opening 21 and the third feed opening 31.

In this embodiment, it is preferable that the level switches 90 are installed at the first feed opening 11, the second feed opening 21, and the third feed opening 31, so as to control the input amount of the grease, where the level switches 90 are node signals, the full tank is 0, and the non-full tank is 1, and when the material is conveyed to the full tank, the output of the level switches 90 is 0, so as to control the input of the grease in the corresponding process.

The invention also provides an automatic coarse-fine secondary separation and purification process for the kitchen waste oil, which comprises the following specific steps:

the first step is as follows: conveying the crude oil into a crude separation tank 10 through a feeding pump 41, feeding back information through a material level switch 90 at a first feeding hole 11 when the tank is full, stopping conveying through the feeding pump 41, and closing a material valve 51;

the second step is that: opening a steam valve 80 on the first heater 13, allowing steam to enter the first heater 13 to heat crude grease, standing and layering the crude grease, and outputting the crude grease outwards through a first discharge hole 12;

the crude oil enters the crude separation tank 10 to be heated and layered, wherein the crude oil, the water and the solid matters are sequentially discharged from top to bottom, and when the crude oil is discharged outwards through the first discharge hole 12, the solid matters are discharged firstly, then the water is discharged, and finally the crude oil is discharged.

The third step: the densimeter 17 detects the density of the grease component output by the first discharge port 12 and controls to open the first-stage deslagging valve 16 or the first-stage drain valve 15 or the first-stage oil discharge valve 14;

at the moment, the densimeter 17 carries out density detection on output substances, the first-stage residue discharge valve 16 is controlled to be opened when solid substances are detected, the first-stage drain valve 15 is controlled to be opened when water is detected, the first-stage oil discharge valve 14 is controlled to be opened when grease is detected, the steps are sequentially carried out, when one valve is opened, the rest two valves are in a closed state, the densimeter 17 is arranged to facilitate the judgment of the boundary of the two substances, and the accurate three-phase separation is ensured.

The fourth step: the grease output by the first-stage oil discharge valve 14 enters the fine separation tank 20 from the second feed port 21, when the tank is full, the material level switch 90 at the second feed port 21 feeds back information, and the grease stops being input;

the fifth step: opening a steam valve 80 on the second heater 23, allowing steam to enter the second heater 23 to heat the grease, allowing the stirrer 26 to work to stir the grease, and allowing the grease to stand for layering and then being discharged from the second discharge port 22;

the grease output by the first-stage oil discharge valve 14 enters the fine separation tank 20 to further separate oil from water, wherein besides the grease is heated, a stirrer 26 is arranged for stirring in a memorable manner, the grease and the water are thoroughly separated and are separated into an upper layer and a lower layer, and finally the substances are conveyed outwards through the second discharge hole 22.

And a sixth step: the first conductivity detector 27 detects the conductivity of the grease component output from the second discharge port 22, and controls to open the second-stage drain valve 25 or the second-stage oil drain valve 24;

in this embodiment, it is preferable that the first conductivity detector 27 is disposed at the second discharge port 22 to detect conductivity of the grease, water is first output, the second-stage drain valve 25 is controlled to be opened after the first conductivity detector 27 detects the grease, the second-stage drain valve 24 is controlled to be opened when the first conductivity detector 27 detects the grease, the corresponding second-stage drain valve 25 is closed, and the grease is output.

The seventh step: the feeding pump 42 conveys the grease output by the secondary oil discharge valve 24 to the feeding valve 52 and further conveys the grease into the finished oil tank 30, when the tank is full, the material level switch 90 at the third feeding port 31 feeds back information, and the grease stops being input;

the grease output by the secondary oil drain valve 24 is conveyed to the product oil tank 30, preferably, in actual operation, after the grease is output for a certain time or after a certain amount of grease is input into the product oil tank 30, the grease is controlled to flow back into the fine separation tank 20 through the feed pump 42 and the feed valve 52 and the primary reflux valve 61 for further separation, so as to ensure high grease separation degree.

Eighth step: after standing still in the finished oil tank 30, the grease is conveyed outwards through a third discharge hole 32, an external conveying valve 53, an external conveying pump 43 and a third-stage oil discharge valve 34 in sequence;

after standing still in the finished oil tank 30, the grease is conveyed outwards through the third discharge port 32, the outward conveying valve 53, the outward conveying pump 43 and the third-stage oil drain valve 34 in sequence, and after a certain time or a certain amount of grease is output, the grease is controlled to flow back to the finished oil tank 30 through the outward conveying pump 43 and the second-stage return valve 62 for further precipitation, and the specific operation is determined according to the actual production effect.

The ninth step: the second conductivity detector 33 detects the conductivity of the grease component output from the feed valve 52, and controls to open the three-stage drain valve 35 or the three-stage drain valve 34.

In order to ensure the purity of the finally output grease, in the embodiment, a second conductivity detector 33 is further arranged between the output valve 53 and the output pump 43, and when the normal output grease is detected, the third-stage oil drain valve 34 is controlled to be opened to output the purified grease; when more water quality is detected in the output grease, the three-stage drain valve 35 is controlled to be opened, and the water quality is output outwards through the outward delivery pump 43 and the three-stage drain valve 35.

It should be noted that, after the separation and purification are performed for a plurality of times, some residual substances are inevitably deposited in the product oil tank 30, in this embodiment, it is preferable to provide an auxiliary valve 54 at the bottom of the product oil tank 30, so that the residual substances are conveniently discharged through the outward-conveying pump 43, and the cleaning of the product oil tank 30 at a later stage is facilitated.

The automatic coarse-fine secondary separation device for the kitchen waste oil is reasonable in structure arrangement, and through the matched use of the coarse separation tank 10, the fine separation tank 20 and the finished oil tank 30, the kitchen waste oil is subjected to coarse-fine secondary separation and purification, so that the recovery rate of the kitchen waste oil is improved, and the reutilization of resources is facilitated; the density meter 17 and the conductivity detector are arranged to enhance the separation effect of the kitchen waste grease, and the purification rate is high; in addition, through material level switch 90 control feeding, temperature transmitter 70 cooperation steam heating system and automatic valve switch etc. carry out long-range automatic chain operation such as digital signal acquisition and processing, degree of automation is high, and the treatment effect is obvious, realizes the automated control that the abandoned grease of kitchen cabinet handled.

What has been described herein is merely a preferred embodiment of the invention, and the scope of the invention is not limited thereto. Modifications, additions, or substitutions by those skilled in the art to the specific embodiments described herein are intended to be within the scope of the invention.