CN214218342U - Oil-water separation device for oily waste water of kitchen garbage - Google Patents
Oil-water separation device for oily waste water of kitchen garbage Download PDFInfo
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- CN214218342U CN214218342U CN202022454134.4U CN202022454134U CN214218342U CN 214218342 U CN214218342 U CN 214218342U CN 202022454134 U CN202022454134 U CN 202022454134U CN 214218342 U CN214218342 U CN 214218342U
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Abstract
The utility model provides a device for separating oil from water in oily waste water of kitchen garbage, wherein an outer cavity is arranged outside a hydraulic centrifuge, a raw material inlet is arranged on the outer cavity, the top of the outer cavity is communicated with the hydraulic centrifuge, and a frustum is arranged at the inner bottom of the hydraulic centrifuge; a plurality of disc-shaped inclined plates are arranged in the outer cavity; the top of the hydraulic centrifuge is connected with the oil phase gravity settling device through a pipeline. The device utilizes the combination of the improved hydraulic centrifuge and the oil phase gravity settling device to realize the twice separation of oil and water, and improves the effect of oil-water separation. The equipment contained in the device is simple to manufacture, and the investment cost of the device is greatly reduced. Wherein only the hydrocentrifuge needs a pump to provide power and a low-power motor can be used. In addition, the equipment is non-high-speed rotating equipment, so that the operation is simple and the maintenance cost is low.
Description
Technical Field
The utility model relates to an oily waste water treatment technical field particularly, relates to a kitchen garbage oily waste water oil-water separation's device.
Background
Kitchen waste treatment plants are established in many cities, in order to meet the requirements of anaerobic fermentation processes at the rear ends of the treatment plants, oil-water separation is generally required to be carried out on kitchen waste liquid in the kitchen waste pretreatment process, the oil content in the separated liquid is controlled to be below 1%, and the water content of the separated oil phase is controlled to be below 2.0%.
In the oil-water separation process of kitchen slurry in the current kitchen waste treatment plant in China, almost all the oil is separated and extracted by adopting a mechanical high-speed centrifugation method (the main equipment is a horizontal spiral discharge sedimentation three-phase centrifuge and a disc type three-phase centrifuge).
The principle of the horizontal spiral discharge sedimentation three-phase centrifuge is as follows: the rotary drum and the screw rotate at a high speed in the same direction at a certain differential speed, materials are continuously introduced into the conveying screw inner cylinder through the feeding pipe, enter the rotary drum after being accelerated, and heavy solid-phase substances are deposited on the wall of the rotary drum to form a slag layer under the action of a centrifugal force field. The conveying screw continuously pushes the deposited solid-phase substances to the conical end of the rotary drum and discharges the solid-phase substances out of the machine through the slag discharge port. The lighter liquid phase (water phase and oil phase) forms an inner liquid ring, continuously and respectively overflows from the rotary drum through an overflow port at the large end of the rotary drum, and is discharged out of the machine through a liquid discharge port. Through the process, three-phase separation of oil, water and slag of the kitchen slurry is realized.
The principle of the disc type three-phase centrifuge is as follows: the rotary drum rotating at high speed is installed on the upper end of the vertical shaft and is driven by the motor through a transmission device to rotate at high speed. A group of disk-shaped parts, namely disks, which are mutually sleeved together are arranged in the rotary drum, a small gap is reserved between the disks, and kitchen slurry is added into the rotary drum through a feeding pipe positioned in the center of the rotary drum. When the heavy-phase solid particles flow through the gaps between the discs, the heavy-phase solid particles sink to the discs under the action of a centrifugal machine to form sediments, and the sediments slide along the surfaces of the discs to be separated from the discs, are accumulated at the position with the largest inner diameter of the rotary drum and are discharged out of the machine at a sediment area. The oil phase and the water phase with smaller specific gravity move upwards along the disc wall to the top of the rotary drum, the oil phase is discharged out of the machine by the oil phase centripetal pump, and the water phase is discharged out of the machine by the water phase centripetal pump. The solids accumulated in the drum are removed manually by disassembling the drum after the separator is shut down, or discharged from the drum through a slag discharge mechanism without shutting down the separator.
In the device, the horizontal spiral discharge sedimentation three-phase centrifuge generally adopts the centrifugal rotating speed of 2600-plus-3500 rpm to separate oil from water, the disc type three-phase centrifuge generally adopts the centrifugal rotating speed of 5000-plus-6000 rpm to separate oil from water, the oil content of the separated water phase can be basically controlled within 1 percent, the oil-water separation efficiency is improved, but the defects are very obvious:
1) because the drum is high-speed mechanical equipment, the manufacturing requirement is high, corrosion-resistant and torque-resistant dual-phase steel materials are required to be used as core components of the drum, and the one-time investment cost of the equipment is high.
2) In order to enable the equipment to reach high rotating speed and meet a certain processing load, a motor with larger power needs to be equipped, and the electricity charge is higher in the operating cost.
3) The kitchen slurry contains certain solid particles, under the condition of high-speed rotation, the equipment is large in abrasion, the blocking probability is high, the parts need to be regularly cleaned and irregularly replaced, and the maintenance cost is high.
4) When the kitchen slurry component entering the centrifuge equipment fluctuates, the equipment is difficult to stably maintain the oil-water separation effect, and the situation that the oil content of the separated water phase does not reach the standard is very likely to occur.
5) The centrifugal equipment is finer equipment, each part and part are more, and an operator and a maintainer need to master multi-disciplinary professional comprehensive knowledge such as materials, machinery, electricians, instruments, automatic control and the like.
In view of this, the present invention is especially provided.
SUMMERY OF THE UTILITY MODEL
The utility model provides a device of oily waste water oil-water separation of rubbish from cooking to solve above-mentioned problem totally or partially, utilize modified water centrifuge and oil phase gravity to subside the device combination and realize the separation of profit twice, improve oil-water separation's effect, the device equipment is made comparatively simply, investment cost reduces by a wide margin, wherein only water centrifuge needs the pump to supply power, can use low-power motor, because equipment is non-high-speed rotating equipment, and easy operation, the maintenance cost is low.
In order to realize the above purpose of the utility model, the following technical scheme is adopted:
a device for separating oil from water in oily waste water of kitchen garbage comprises a hydraulic centrifuge and an oil phase gravity settling device;
an outer cavity is arranged outside the hydraulic centrifuge, a raw material inlet is arranged on the outer cavity, and the outer cavity is communicated with the side wall of the top of the hydraulic centrifuge;
a frustum is arranged at the bottom in the hydraulic centrifuge;
a plurality of disc-shaped inclined plates are arranged in the outer cavity;
the top of the hydraulic centrifuge is connected with the oil phase gravity settling device through a pipeline.
Preferably, the oil-water separation device for oily wastewater of kitchen waste further comprises a raw material storage device, a first stirring device is arranged in the raw material storage device, and the raw material storage device is connected with the raw material inlet on the outer cavity through a pipeline.
Preferably, the bottom of the raw material storage device is provided with a steam heating perforated pipe; and/or; the outer side of the raw material storage device is wound with a first electromagnetic heating belt.
Preferably, the top of the raw material storage device is provided with an ultrasonic grease demulsifying device.
Preferably, a cut-off ball valve and a hydraulic cyclone pump are arranged on a pipeline between the raw material storage device and the raw material inlet on the outer cavity.
Preferably, the distance between the disc-shaped inclined plates is 2-5mm, and more preferably, the disc-shaped inclined plates are made of oleophylic and hydrophobic materials.
Preferably, the device for oil-water separation of oily wastewater of kitchen waste is further provided with a water phase recovery device, the water phase recovery device is respectively connected with the hydraulic centrifuge and the bottom of the oil phase gravity settling device, and a buoyancy device is arranged at the joint of the water phase recovery device and the oil phase gravity settling device.
Preferably, an automatic valve with adjustable opening degree is arranged at the joint of the water phase recovery device and the bottom of the hydraulic centrifuge.
Preferably, the hydrocyclone is arranged for multistage separation.
Preferably, a second stirring device is arranged in the water phase recovery device.
Preferably, a second electromagnetic heating belt is wound on the outer side of the oil phase gravity settling device.
Preferably, an oil phase discharge hole is formed in the top of the oil phase gravity settling device.
Preferably, the oil-water separation device for oily wastewater of kitchen waste is made of 304 stainless steel and/or carbon steel.
Compared with the prior art, the beneficial effects of the utility model are that:
(1) the utility model provides a kitchen remains rubbish oily waste water oil-water separation's device to follow-on hydrocentrifuge is the basis, on the basis of current hydrocentrifuge, has set up outer cavity, has formed two internal and external cavitys of hydrocentrifuge, and set up a plurality of dish swash plates in outer cavity, the little oil drips and the tiny oil drips after dish swash plate department coalescence, reentrants interior cavity, has improved whirl water oil separating efficiency. The device is simple in equipment manufacture and greatly reduces the investment cost. Wherein, only the hydraulic centrifuge needs the pump to supply power, can use the motor of low power, because equipment is not high-speed rotating equipment, easy operation, the maintenance cost is low.
(2) The utility model discloses set up the frustum in the inherent bottom of hydrocentrifuge, increased the reaction force of inside whirl back oil phase, improved whirl water oil separating efficiency.
(3) The utility model provides a device of oily waste water oil-water separation of rubbish from cooking has set up buoyant device in oil phase gravity settlement device internal connection department, has cancelled the manual operation step of oil phase settlement back profit layering drainage, has practiced thrift the operation cost.
(4) The utility model provides a kitchen garbage oily waste water oil-water separation's device, improved generation hydrocentrifuge lower part discharge gate have set up the automatic valve of adjustable aperture, can carry out the regulation of aperture according to the size of material oiliness rate, and whirl water oil separating efficiency has been guaranteed to the backpressure in control bottom export aqueous phase.
(5) The utility model provides a kitchen garbage oily waste water oil-water separation's device, power consumption is little, handles the material of same load, and configuration motor power is low, and the investment cost is low, and it is convenient to overhaul, and the maintenance cost is low.
(6) The utility model provides a kitchen garbage oily waste water oil-water separation's device, raw materials oil content scope that can use is wider, especially is high to the undulant tolerance of oiliness rate in the surplus thick liquid of raw materials kitchen.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a device for separating oil from water in oily waste water of kitchen waste provided by an embodiment of the utility model.
Reference numerals:
1-a raw material storage device; 2-a hydrocentrifuge; 3-an outer cavity;
4-frustum of a cone; 5-cutting off the ball valve; 6-a hydraulic cyclone pump;
7-a first stirring device; 8-a water phase recovery unit; 9-a first electromagnetic heating zone;
10-a second stirring device; 11-steam heating the perforated pipe; 12-a disc-shaped sloping plate;
13-oil phase gravity settling device; 14-a second electromagnetic heating belt; 15-buoyancy means.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings and detailed description, but those skilled in the art will understand that the following described embodiments are some, not all, of the embodiments of the present invention, and are only used for illustrating the present invention, and should not be construed as limiting the scope of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention. The examples, in which specific conditions are not specified, were conducted under conventional conditions or conditions recommended by the manufacturer. The reagents or instruments used are not indicated by the manufacturer, and are all conventional products available commercially.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Fig. 1 is a schematic structural diagram of a device for separating oil from water in oily wastewater in kitchen waste provided by an embodiment of the present invention, in which an improved hydraulic centrifuge 2 and an oil phase gravity settling device 13 are combined to realize twice oil-water separation, the hydraulic centrifuge 2 and the oil phase gravity settling device 13;
an outer cavity 3 is arranged outside the hydraulic centrifuge 2, a raw material inlet is arranged on the outer cavity 3, the outer cavity 3 is communicated with the side wall of the top of the hydraulic centrifuge 2, one or more communication ports, preferably three communication ports distributed uniformly, are arranged on the side wall at an angle of 120 degrees;
a frustum 4 is arranged at the bottom in the hydraulic centrifuge 2;
a plurality of disc-shaped inclined plates 12 are arranged in the outer cavity 3;
the top of the hydraulic centrifuge 2 is connected with the oil phase gravity settling device 13 through a pipeline.
The slurry fluid mixed with water and oil firstly enters the outer cavity 3, coalescence is carried out at the disk-shaped inclined plate 12 of the outer cavity 3, micro oil drops and small oil drops are coalesced into large oil drops, then the large oil drops enter the interior of the hydraulic centrifuge 2, the fluid spirally flows accelerated by the frustum 4 at the inner lower part of the hydraulic centrifuge 2 to form a larger centrifugal force, the oil phase with lighter density is gathered at the center of the hydraulic centrifuge 2 by the centrifugal force, the water phase with higher density is thrown to the side wall of the hydraulic centrifuge 2, when the conical size is smaller and smaller, the oil phase rises from the center under the reaction force of the frustum 4 at the bottommost part and then flows out from the discharge port at the top part of the hydraulic centrifuge 2 to enter the oil phase gravity settling device 13, and the water phase is heavier and flows out from the outlet at the bottom part, thereby realizing the primary oil-water separation. The arrangement of the frustum 4 at the bottom of the hydraulic centrifuge 2 reduces the possibility that the oil phase escapes from the discharge hole at the bottom of the hydraulic centrifuge 2, and improves the oil-water separation efficiency.
Further, kitchen garbage oily waste water oil-water separation's device still includes raw materials storage device 1, be provided with first agitating unit 7 in the raw materials storage device 1, improved the mixing degree of oil phase and aqueous phase, raw materials storage device 1 with on the outer cavity 3 the raw materials import is connected through the pipeline.
Further, a steam heating perforated pipe 11 is arranged at the bottom of the raw material storage device 1, the steam heating perforated pipe 11 is connected with a steam generating device, steam enters the raw material storage device 1 through the steam heating perforated pipe 11 and is uniformly mixed with the materials to achieve the effect of quickly heating the materials, and the temperature of the meal materials is controlled to be 80-90 ℃; when no steam is supplied, the first electromagnetic heating belt 9 is wound on the outer side of the raw material storage device 1, or the two heating modes are used simultaneously.
Furthermore, a cutting ball valve 5 and a hydraulic cyclone pump 6 are arranged on a pipeline between the raw material storage device 1 and the raw material inlet on the outer cavity 3.
Furthermore, the distance between the disc-shaped inclined plates 12 is 2-5mm, the angle between the disc-shaped inclined plates 12 and the horizontal line is 30-120 degrees, and further, the disc-shaped inclined plates 12 are made of oleophylic and hydrophobic materials, so that oil-water separation is easy.
Furthermore, the device for oil-water separation of oily wastewater of kitchen waste is further provided with a water phase recovery device 8, the water phase recovery device 8 is respectively connected with the hydraulic centrifuge 2 and the bottom of the oil phase gravity settling device 13, a buoyancy device 15 is arranged at the connection position of the water phase recovery device 8 and the oil phase gravity settling device 13, when the water phase at the lower part of gravity settling is accumulated to reach a set liquid level, the buoyancy device 15 automatically floats, an automatic valve linked between the water phase recovery device 8 and the oil phase gravity settling device 13 is opened, and the accumulated water phase is discharged to the water phase recovery device 8 after the automatic valve is opened. The manual operation step of oil-water layered drainage after the oil phase is settled is eliminated, the workload is reduced, and the operation cost is saved.
In addition, an automatic valve with adjustable opening degree can be arranged at the joint of the water phase recovery device 8 and the hydrocentrifuge 2, so that the opening degree can be adjusted according to the oil content of the material, the back pressure of the water phase at the bottom outlet of the hydrocentrifuge 2 is controlled, and the cyclone oil-water separation efficiency is ensured.
Further, a second stirring device 10 is arranged in the water phase recovery device 8 to ensure that the components of the material entering the water phase recovery device 8 are uniform.
Further, the second electromagnetic heating belt 14 is wound on the outer side of the oil phase gravity settling device 13, so that the oil phase is prevented from being solidified and the separation efficiency is prevented from being influenced.
Further, an oil phase discharge hole is formed in the top of the oil phase gravity settling device 13.
Furthermore, the device provided by the utility model has wide material selection range, and the material of the oily waste water oil-water separation device of the kitchen garbage is 304 stainless steel and/or carbon steel.
Further, when the content of oil in the oil-water mixture is more than 5 wt%, the hydrocyclone can be set to multi-stage separation in order to ensure the oil-water separation effect after separation.
Example 1
The method for oil-water separation provided by the embodiment comprises the following steps:
a. after the kitchen oil-containing slurry (with the oil content of 1%) enters the raw material storage device 1 through the feeding hole, steam is used for heating the slurry, the steam temperature is 120 ℃, the pressure is 0.10MPa, the steam is sprayed out through the steam heating perforated pipe 11 and directly contacts with the material, the effect of quickly heating the material is achieved, and the temperature of the kitchen slurry is controlled to be 80-90 ℃.
When no steam is supplied, the first electromagnetic heating belt 9 is arranged on the outer wall of the raw material storage device 1, and the raw material storage device 1 is made of 304 stainless steel, so that heat can be conducted quickly. In order to ensure the uniform heating effect of the material and the stable components of the material leading to the rear end, a first stirring device 7 is also arranged in the raw material storage device 1. The heated and stirred kitchen slurry enters an outer cavity 3 arranged outside the hydrocentrifuge 2 from the raw material storage device 1, and the pressure at the feed inlet is kept between 0.5 and 0.6 MPa.
A plurality of dish-shaped swash plates 12 that set up in outer cavity 3 department coalescence, dish-shaped swash plate 12 interval are 2mm, and tiny oil drips and little oil drip coalescence becomes big oil drip, and then the thick liquid is followed the three passageway tangential that is 120 evenly distributed of lateral wall at 2 tops of hydraulic centrifuge gets into hydraulic centrifuge 2's inside, forms the spiral through the rotation and flows, makes the center of hydraulic centrifuge 2 of gathering of the oil phase that density is lighter, and the aqueous phase that density is big has been got rid of on the lateral wall, realizes profit primary separation.
The outlet at the bottom end of the hydraulic centrifuge 2 is provided with a discharge pipeline and an electric valve, if the components of the oil-containing slurry change, the oil-water separation effect is ensured by adjusting the opening of the electric valve, when the oil content is higher, the opening of the adjusting valve is reduced, and when the oil content is lower, the opening of the adjusting valve is increased.
b. The oil phase of the hydraulic centrifuge 2 overflows from the top overflow port and then enters the oil phase gravity settling device 13 through the connector, the gravity settling is designed according to the hydraulic retention time of 30 minutes, after the retention time is met, the upper layer oil overflows from the discharge port and is discharged, the water content in the oil is enabled to be less than 1.0%, and the selling requirement is met.
In order to ensure the gravity settling effect of the grease, the oil phase tank is provided with a second electromagnetic heating belt 14, so that the temperature of the materials on two sides is kept between 80 ℃ and 90 ℃.
The bottom of the oil phase gravity settling device 13 is provided with a buoyancy device 15 and a discharge port, when the water phase at the lower part of the oil phase gravity settling device 13 is accumulated to reach a set liquid level due to gravity settling, the buoyancy device 15 automatically floats and is linked to the opening of an automatic valve between the water phase recovery device 8 and the oil phase gravity settling device 13, and the accumulated water phase is discharged to the water phase recovery device 8 after the automatic valve is opened.
In addition, the water phase discharged from the bottom end of the hydraulic centrifuge 2 enters the water phase recovery device 8 through the inlet port, in order to ensure that the components of the materials entering the rear end are uniform, the second stirring device 10 is arranged in the tank, after twice separation, the oil content in the water phase recovery device 8 is lower than 0.5%, and the water can be discharged and recycled.
The device with the treatment capacity of 10t/h in the method only needs to be provided with a motor with the total power of 28kW (622 kW of a hydraulic cyclone pump, 3kW of a raw material tank stirrer and 3kW of a water phase tank stirrer).
Example 2
The method for oil-water separation provided by the embodiment comprises the following steps:
a. after the kitchen oil-containing slurry (with the oil content of 5%) enters the raw material storage device 1 through the feeding hole, steam is used for heating the slurry, the steam temperature is 140 ℃, the pressure is 0.25MPa, the steam is sprayed out through the steam heating perforated pipe 11 and directly contacts with the material, the effect of quickly heating the material is achieved, and the temperature of the kitchen slurry is controlled to be 80-90 ℃.
When no steam supply, at the first electromagnetic heating area 9 that raw materials storage device 1 outer wall set up, raw materials storage device 1 adopts the carbon steel material, can conduct heat fast. In order to ensure the uniform heating effect of the material and the stable components of the material leading to the rear end, a first stirring device 7 is also arranged in the raw material storage device 1. The heated and stirred kitchen slurry enters an outer cavity 3 arranged outside the hydrocentrifuge 2 from the raw material storage device 1, and the pressure at the feed inlet is kept between 0.5 and 0.6 MPa.
The dish-shaped sloping plate 12 department that sets up in outer cavity 3 coalesces, and dish-shaped sloping plate 12 interval is 3mm, and tiny oil drop and little oil drop coalesce into big oil drop, then the thick liquid is followed the three passageway tangential that is 120 evenly distributed of lateral wall at 2 tops of hydraulic centrifuge gets into hydraulic centrifuge 2's inside, forms the spiral through the rotation and flows, makes the center of hydraulic centrifuge 2 of gathering of the lighter oil phase of density, and the aqueous phase that density is big has been got rid of on the lateral wall, realizes profit primary separation.
The outlet at the bottom end of the hydraulic centrifuge 2 is provided with a discharge pipeline and an electric valve, if the components of the oil-containing slurry change, the oil-water separation effect is ensured by adjusting the opening of the electric valve, when the oil content is higher, the opening of the adjusting valve is reduced, and when the oil content is lower, the opening of the adjusting valve is increased.
b. The oil phase of the hydraulic centrifuge 2 overflows from the top overflow port and then enters the oil phase gravity settling device 13 through the connector, the gravity settling is designed according to the hydraulic retention time of 30 minutes, after the retention time is met, the upper layer oil overflows from the discharge port and is discharged, the water content in the oil is enabled to be less than 1.0%, and the selling requirement is met.
In order to ensure the gravity settling effect of the grease, the oil phase tank is provided with a second electromagnetic heating belt 14, so that the temperature of the materials on two sides is kept between 80 ℃ and 90 ℃.
The bottom of the oil phase gravity settling device 13 is provided with a buoyancy device 15 and a discharge port, when the water phase at the lower part of the oil phase gravity settling device 13 is accumulated to reach a set liquid level due to gravity settling, the buoyancy device 15 automatically floats and is linked to the opening of an automatic valve between the water phase recovery device 8 and the oil phase gravity settling device 13, and the accumulated water phase is discharged to the water phase recovery device 8 after the automatic valve is opened.
In addition, the water phase discharged from the bottom end of the hydraulic centrifuge 2 enters the water phase recovery device 8 through the inlet port, in order to ensure that the components of the materials entering the rear end are uniform, the second stirring device 10 is arranged in the tank, after twice separation, the oil content in the water phase recovery device 8 is lower than 0.5%, and the water can be discharged and recycled.
Example 3
The method for oil-water separation provided by the embodiment comprises the following steps:
a. after the kitchen oil-containing slurry (with the oil content of 3%) enters the raw material storage device 1 through the feeding hole, steam is used for heating the slurry, the steam temperature is 130 ℃, the pressure is 0.20MPa, the steam is sprayed out through the steam heating perforated pipe 11 and directly contacts with the material, the effect of quickly heating the material is achieved, and the temperature of the kitchen slurry is controlled to be 80-90 ℃.
When no steam is supplied, the first electromagnetic heating belt 9 is arranged on the outer wall of the raw material storage device 1, and the raw material storage device 1 is made of 304 stainless steel, so that heat can be conducted quickly. In order to ensure the uniform heating effect of the material and the stable components of the material leading to the rear end, a first stirring device 7 is also arranged in the raw material storage device 1. The heated and stirred kitchen slurry enters an outer cavity 3 arranged outside a hydrocentrifuge 2 from a raw material storage device 1, the pressure at a feed inlet is kept between 0.5 and 0.6MPa, and an ultrasonic grease emulsion breaker is arranged at the top of the raw material storage device to eliminate the emulsification phenomenon.
The dish-shaped sloping plate 12 department that sets up in outer cavity 3 coalesces, and dish-shaped sloping plate 12 interval is 5mm, and tiny oil drop and little oil drop coalesce into big oil drop, then the thick liquid is followed the three passageway tangential that is 120 evenly distributed of lateral wall at 2 tops of hydraulic centrifuge gets into hydraulic centrifuge 2's inside, forms the spiral through the rotation and flows, makes the center of hydraulic centrifuge 2 of gathering of the lighter oil phase of density, and the aqueous phase that density is big has been got rid of on the lateral wall, realizes profit primary separation.
The outlet at the bottom end of the hydraulic centrifuge 2 is provided with a discharge pipeline and an electric valve, if the components of the oil-containing slurry change, the oil-water separation effect is ensured by adjusting the opening of the electric valve, when the oil content is higher, the opening of the adjusting valve is reduced, and when the oil content is lower, the opening of the adjusting valve is increased.
b. The oil phase of the hydraulic centrifuge 2 overflows from the top overflow port and then enters the oil phase gravity settling device 13 through the connector, the gravity settling is designed according to the hydraulic retention time of 30 minutes, after the retention time is met, the upper layer oil overflows from the discharge port and is discharged, the water content in the oil is enabled to be less than 1.0%, and the selling requirement is met.
In order to ensure the gravity settling effect of the grease, the oil phase tank is provided with a second electromagnetic heating belt 14, so that the temperature of the materials on two sides is kept between 80 ℃ and 90 ℃.
The bottom of the oil phase gravity settling device 13 is provided with a buoyancy device 15 and a discharge port, when the water phase at the lower part of the oil phase gravity settling device 13 is accumulated to reach a set liquid level due to gravity settling, the buoyancy device 15 automatically floats and is linked to the opening of an automatic valve between the water phase recovery device 8 and the oil phase gravity settling device 13, and the accumulated water phase is discharged to the water phase recovery device 8 after the automatic valve is opened.
In addition, the water phase discharged from the bottom end of the hydraulic centrifuge 2 enters the water phase recovery device 8 through the inlet port, in order to ensure that the components of the materials entering the rear end are uniform, the second stirring device 10 is arranged in the tank, after twice separation, the oil content in the water phase recovery device 8 is lower than 0.5%, and the water can be discharged and recycled.
While particular embodiments of the present invention have been illustrated and described, it will be appreciated that the above embodiments are merely illustrative of the technical solution of the present invention and are not restrictive; those of ordinary skill in the art will understand that: modifications may be made to the technical solutions described in the foregoing embodiments, or some or all of the technical features may be equivalently replaced without departing from the spirit and scope of the present invention; the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention; it is therefore intended to cover in the appended claims all such alternatives and modifications that are within the scope of the invention.
Claims (9)
1. A device for separating oil from water in oily wastewater of kitchen garbage is characterized by comprising a hydraulic centrifuge and an oil phase gravity settling device;
an outer cavity is arranged outside the hydraulic centrifuge, a raw material inlet is arranged on the outer cavity, and the outer cavity is communicated with the side wall of the top of the hydraulic centrifuge;
a frustum is arranged at the bottom in the hydraulic centrifuge;
a plurality of disc-shaped inclined plates are arranged in the outer cavity;
the top of the hydraulic centrifuge is connected with the oil phase gravity settling device through a pipeline.
2. The oil-water separation device for oily waste water of kitchen garbage according to claim 1, further comprising a raw material storage device, wherein a first stirring device is arranged in the raw material storage device, and the raw material storage device is connected with the raw material inlet on the outer cavity through a pipeline.
3. The oil-water separation device for oily wastewater of kitchen wastes according to claim 2, characterized in that the bottom of the raw material storage device is provided with a steam heating perforated pipe;
and/or;
a first electromagnetic heating belt is wound on the outer side of the raw material storage device;
and/or;
the top of the raw material storage device is provided with an ultrasonic grease demulsifying device.
4. The oil-water separation device for oily waste water of kitchen wastes according to claim 2, characterized in that a cut-off ball valve and a hydraulic cyclone pump are arranged on a pipeline between the raw material storage device and the raw material inlet on the outer cavity.
5. The oil-water separation device for oily wastewater of kitchen wastes according to claim 1, wherein the distance between the disc-shaped inclined plates is 2-5mm, and the disc-shaped inclined plates are made of oleophilic and hydrophobic materials.
6. The device for separating oil from water in oily waste water of kitchen garbage according to claim 1, further comprising a water phase recovery device, wherein the water phase recovery device is connected with the hydraulic centrifuge and the bottom of the oil phase gravity settling device respectively, and a buoyancy device is arranged at the connection position of the water phase recovery device and the oil phase gravity settling device;
an automatic valve with adjustable opening degree is arranged at the joint of the water phase recovery device and the bottom of the hydraulic centrifuge;
and a second stirring device is arranged in the water phase recovery device.
7. The oil-water separation device for oily waste water of kitchen garbage according to claim 1, wherein the hydrocyclone is configured for multi-stage separation.
8. The oil-water separation device for oily wastewater of kitchen wastes according to claim 1, wherein a second electromagnetic heating belt is wound around the outside of the oil phase gravity settling device.
9. The oil-water separation device for oily wastewater in kitchen waste according to claim 1, characterized in that the top of the oil phase gravity settling device is provided with an oil phase discharge hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022454134.4U CN214218342U (en) | 2020-10-29 | 2020-10-29 | Oil-water separation device for oily waste water of kitchen garbage |
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