CN212833268U

CN212833268U - Kitchen garbage leachate grease extraction system

Info

Publication number: CN212833268U
Application number: CN202021658635.8U
Authority: CN
Inventors: 杜港; 甄胜利; 凌锦明; 齐长青; 陈君; 陈雨; 杨庆彬
Original assignee: Beijing Geoenviron Engineering and Technology Inc
Current assignee: Beijing Geoenviron Engineering and Technology Inc
Priority date: 2020-08-11
Filing date: 2020-08-11
Publication date: 2021-03-30
Anticipated expiration: 2030-08-11

Abstract

The utility model discloses a kitchen waste leachate grease extraction system, which comprises an impurity removing machine for filtering impurities in the kitchen waste leachate; a feed inlet of the heating tank is connected with a filtrate outlet of the impurity remover, and the heating pipe is used for heating the filtrate; a liquid inlet of the centrifuge is connected with a discharge port of the heater, and the centrifuge is used for centrifuging the filtrate; the liquid inlet of the oil-water separator is connected with the oil outlet and is used for extracting oil from the filtrate. Get rid of the impurity of kitchen garbage filtration liquid through the shaker, the heating jar gets into the heating to the filtrating behind the miscellaneous sieve, reduces the viscosity of filtrating, the filtrating centrifugation oil and water of being convenient for, centrifuge carries out centrifugal treatment to the filtrating, oil water separator is to the layering of stewing of fluid after the centrifugal treatment, draws the grease, this system operation is stable, the grease extraction rate is high, advantages such as crude oil content height, the grease of separating can directly be sold in the market and be used for biodiesel's preparation.

Description

Kitchen garbage leachate grease extraction system

Technical Field

The utility model relates to a kitchen garbage treatment facility field, more specifically relates to a kitchen garbage filtration liquid grease extraction system.

Background

Kitchen waste, commonly known as swill, also known as hogwash and swill, is mainly generated in catering industry, dining halls and families, and mainly refers to domestic sewage and waste which is easy to rot and deteriorate and is generated by eating behaviors of people. Compared with other garbage, the garbage has the characteristics of high water content, high grease content and high inorganic salt content. The kitchen waste accounts for a large proportion of municipal domestic waste, and is a high-quality harmful organism culture medium which is a byproduct of human beings, so that mosquito, fly and germ can be easily and spontaneously bred, toxic, stink and combustible gas can be generated, and fire-fighting hidden dangers and environmental protection and public health problems can be caused. The waste oil and swill pig which improperly utilize the kitchen waste have great harm, and the kitchen waste is an available resource due to rich oil and other organic matter content and higher heat value after dehydration.

At present, the kitchen waste treatment technology in China mainly comprises anaerobic digestion, aerobic treatment, synergistic incineration, feed conversion and the like. Anaerobic digestion is a mainstream technology, and is popular due to mature technology, but the requirements on pretreatment technology and debugging are high, the resource conversion rate is low, and the treatment burden of the kitchen waste cannot be really solved. The aerobic fermentation has the advantages of short treatment period, high recycling turnover rate of garbage, small occupied area of projects, reduction rate of more than 95 percent, safe treatment process and no secondary pollution to the environment. The synergistic incineration treatment is to dehydrate the kitchen waste and then mix the dehydrated kitchen waste and the household waste for incineration treatment.

Therefore, a kitchen waste leachate grease extraction system is needed to be provided, which can extract grease from kitchen waste leachate generated in the kitchen waste collaborative incineration treatment process.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a kitchen garbage filtration liquid grease extraction system can carry out the grease to the kitchen garbage filtration liquid that produces in the kitchen garbage incineration disposal process in coordination and draw.

In order to achieve the above object, the utility model provides a kitchen garbage leachate grease extraction system, include: the method comprises the following steps:

the impurity removing machine is used for filtering impurities of the kitchen waste leachate, and the filtrate of the kitchen waste leachate after impurity filtration is discharged from a filtrate outlet;

the feed inlet of the heating tank is connected with the filtrate outlet of the impurity remover, and the heating pipe is used for heating the filtrate;

a liquid inlet of the centrifuge is connected with a liquid outlet of the heater, the centrifuge is used for centrifuging the filtrate, and the centrifuge is provided with a first water outlet and an oil drain outlet;

and the liquid inlet of the oil-water separator is connected with the oil discharge port and used for extracting grease from the filtrate, and a second water outlet is formed in the bottom of the oil-water separator.

Preferably, the impurity removing machine comprises a screw shaft and a screen, the screw shaft is horizontally arranged, the screen is sleeved outside the screw shaft, a material inlet is formed in the upper portion of the screw shaft, the liquid phase outlet is formed in the lower portion of the screen, one end of the screw shaft is connected with a driving device, the driving device is used for driving the screw shaft to rotate around the axis of the screw shaft, and a solid-phase impurity outlet is formed in the other end of the screw shaft.

Preferably, the screw shaft includes a shaft body and a double helical blade provided around the shaft body, the double helical blade being symmetrically arranged around the shaft body.

Preferably, a plurality of connecting plates arranged along the helical blade are arranged between the double helical blade and the shaft body, and the double helical blade is connected with the shaft body through the plurality of connecting plates.

Preferably, still include the oil water pond, the inlet of oil water pond with the shaker liquid phase exit linkage, the oil water pond including the slope pond with set up in the pump pit of slope bottom of the pool portion, be equipped with heating tank charge pump in the pump pit, the liquid outlet of heating tank charge pump with the feed inlet of heating tank is connected.

Preferably, a rotary stirrer is arranged in the center of the oil-water tank, a first liquid level switch is arranged at the lower part of a blade of the rotary stirrer, and when the liquid level in the oil-water tank is lower than the blade, the first liquid level switch controls the stirrer to stop rotating;

the top in the oil water pond is equipped with the second liquid level switch, works as liquid level in the oil water pond is higher than during the second liquid level switch, second liquid level switch control shaker stop motion.

Preferably, the number of the heating tanks is two, and the first controller controls the two heating tanks to be opened and closed alternately in sequence, so that the heating tanks respectively and alternately complete feeding, heating and discharging;

the heating tank includes: a heating tank body, a stirrer and a steam heating pipeline; the top of the heating tank body is provided with a feeding hole, and the bottom of the heating tank body is provided with a discharging hole; the stirrer is arranged at the top of the heating tank body, a stirring shaft of the stirrer extends into the heating tank body, and stirring blades are arranged at the lower end part of the stirring shaft; the steam heating pipeline is arranged in the heating tank body and used for heating materials.

Preferably, the sewage treatment device further comprises a sewage pool, and the first water outlet and the second water outlet are respectively connected with the sewage pool.

Preferably, the oil-water separator comprises a tank body and a heating coil arranged on the outer wall of the tank body, and the heating coil is used for heating the tank body.

Preferably, heating coil is connected with steam conduit, still includes temperature sensor and second controller, temperature sensor is used for detecting the temperature in the tank body, the controller control according to temperature sensor's detection temperature control steam conduit's valve opens and closes.

The beneficial effects of the utility model reside in that: get rid of the impurity of kitchen garbage filtration liquid through the shaker, the heating jar gets into the heating to the filtrating behind the miscellaneous sieve, reduces the viscosity of filtrating, the filtrating centrifugation oil and water of being convenient for, centrifuge carries out centrifugal treatment to the filtrating, oil water separator is to the layering of stewing of fluid after the centrifugal treatment, draws the grease, this system operation is stable, the grease extraction rate is high, advantages such as crude oil content height, the grease of separating can directly be sold in the market and be used for biodiesel's preparation.

Other features and advantages of the present invention will be described in detail in the detailed description which follows.

Drawings

The above and other objects, features and advantages of the present invention will become more apparent by describing in more detail exemplary embodiments thereof with reference to the attached drawings. Wherein like reference numerals generally represent like parts throughout the exemplary embodiments.

Fig. 1 shows the structure schematic diagram of the kitchen waste leachate grease extraction system in an embodiment of the present invention.

Fig. 2 shows a schematic structural diagram of a trash remover in an embodiment of the present invention.

Fig. 3 shows a schematic structural view of the screw shaft according to an embodiment of the present invention.

Fig. 4 is a schematic diagram illustrating an internal structure of the oil-water separator according to an embodiment of the present invention.

Fig. 5 is a schematic diagram showing an external structure of the oil-water separator according to an embodiment of the present invention.

Fig. 6 shows a schematic structural view of a heating tank in an embodiment of the present invention.

Figure 7 shows a top view of a heating tank in an embodiment of the invention.

Fig. 8 shows a schematic piping connection diagram of the heating tank in an embodiment of the present invention.

Fig. 9 shows a schematic structural view of a main pipe for steam heating in an embodiment of the present invention.

Fig. 10 shows a schematic connection diagram of the main steam heating pipe and the steam heating pipe in an embodiment of the present invention.

Description of reference numerals:

1. a slurry tank; 2. a cleaner feed pump; 3. a trash remover; 4. an oil pool; 5. a heating tank feed pump; 6. a heating tank; 7. a screw pump 8 and a centrifuge; 9. a wastewater tank; 10. an oil-water separator; 11. a pipeline; 12. an oil transfer pump; 13. a liquid level meter; 21. a motor; 22. a material inlet; 23. screening a screen; 24. a solid phase impurity outlet; 25. a machine base; 26. a liquid phase outlet; 27. a screw shaft; 31. a helical blade; 32. a connecting plate; 33. a shaft body; 41. a tank body; 42. a temperature sensor; 43. a thermometer; 44. a pressure sensor; 45. an oil outlet; 46. a second water discharge port; 47. a pneumatic knife valve; 48. an oil transfer pump; 49. a manual ball valve; 50. a pneumatic ball valve; 51. a check valve; 52. a drain valve; 53. a heating coil; 54. a condensed water outlet; 55. a drainage ditch; 56. a steam inlet;

101. climbing a ladder; 102. a railing; 103. a stirrer; 104. a steam interface; 105. a platform; 106. heating the tank body; 107. a liquid level switch; 108. emptying the air; 109. a discharge port; 110. a manhole; 111. a steam heating pipeline; 112. a liquid level meter; 113. a thermometer; 114. a temperature sensor; 115. a feed inlet; 116. a deodorizing port; 117. a steam manual valve; 118. a steam automatic valve; 119. a steam feed line; 120. a feed automatic valve; 121. a feed pipe; 122. a manual discharge valve; 123. a discharge automatic valve; 124. a discharge pipe; 125. a steam heating main pipe; 126. the steam heats the sub-tubes.

Detailed Description

Preferred embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. While the preferred embodiments of the present invention have been illustrated in the accompanying drawings, it is to be understood that the invention may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.

According to the utility model discloses kitchen garbage filtration liquid grease extraction system, include:

the impurity removing machine is used for filtering impurities of the kitchen waste leachate, and the filtrate of the kitchen waste leachate after impurity filtering is discharged from a filtrate outlet; a feed inlet of the heating tank is connected with a filtrate outlet of the impurity remover, and the heating pipe is used for heating the filtrate; a liquid inlet of the centrifuge is connected with a liquid outlet of the heater, the centrifuge is used for centrifuging the filtrate, and the centrifuge is provided with a first water outlet and an oil drain outlet; and the liquid inlet of the oil-water separator is connected with the oil discharge port and is used for extracting grease from the filtrate, and a second water discharge port is arranged at the bottom of the oil-water separator.

As an example, the kitchen waste leachate is collected and mixed by the slurry tank, and the kitchen waste is conveyed to the impurity remover by the impurity remover feed pump, so that large-particle impurities in the kitchen waste leachate can be screened out. The filtrate after impurity screening is fed into a heating tank through a heating tank feeding pump, the filtrate is heated, the viscosity of the filtrate is reduced, and the centrifugal separation of oil and water is facilitated; and then conveying the heated filtrate to a centrifugal machine by a screw pump, carrying out oil and water centrifugal treatment on the filtrate by the centrifugal machine, separating oil in the filtrate, conveying the oil to an oil-water separator, conveying the separated wastewater to a wastewater pool through a first water discharge port, and conveying the separated waste residues to a specified position. Oil-water separation heats oil, oil is layered after standing for a period of time, oil on the upper layer is taken, and separated water is discharged from a second outlet at the bottom.

The system is suitable for treating kitchen waste leachate with the solid content of less than 10% and the material particle size of less than 10mm, extracts the grease in the kitchen waste leachate, and has the advantages of simple system, stable operation, high grease extraction rate, high crude oil content and the like, wherein the grease extraction rate is up to 2%, and the crude oil content is more than 97%.

As one example, the shaker feed pump is a submersible sewage pump and the heating tank feed pump is a submersible sewage pump. The submersible sewage pump is a submersible sewage pump which can tear and cut long fibers and other substances in sewage and then smoothly discharge the substances, and is particularly suitable for conveying liquid containing hard solids and fibrous substances and particularly dirty, sticky and slippery liquid.

As one example, the centrifuge is a horizontal centrifuge.

As a preferred scheme, the impurity removing machine comprises a screw shaft and a screen mesh, wherein the screw shaft is horizontally arranged, the screen mesh is sleeved outside the screw shaft, a feed inlet is formed in the upper portion of the screw shaft, a liquid phase outlet is formed in the lower portion of the screen mesh, one end of the screw shaft is connected with a driving device, the driving device is used for driving the screw shaft to rotate around the axis of the screw shaft, and a solid phase impurity outlet is formed in the other.

As an example, the screen is provided with a 15mmX2mm strip-shaped screen hole, and is suitable for filtering impurities in kitchen waste percolate.

The screw axis directly links with drive arrangement, and through fast-speed rotation, the centrifugal force that the filtrating produced can be stirred fast to double helix blade and connecting plate, can be filtered out through being less than 2 mm's filtrating in with kitchen garbage leachate through the screen cloth, and the solid phase impurity export is carried to the impurity in the screen cloth, through the thrust that the screw axis produced.

As an example, the helical blades, the connecting plates and the shaft body are made of stainless steel 304.

As preferred scheme, the screw axis includes the axis body and the double helix blade that sets up around the axis body, and double helix blade is around the axis body symmetrical arrangement, and double helix blade's the same to revolving, through symmetrical arrangement's double helix blade, can improve the speed of stirring to kitchen garbage leachate, improve impurity separation's effect.

As an example, the thickness of the connection plate is 10mm, the width is 30mm, the horizontal angle of the adjacent connection plate is 20 degrees, the pitch of the double helical blade is 25mm, and the rotation speed of the helical shaft is 1000 rpm.

As preferred scheme, be equipped with between double helix blade and the axis body along a plurality of connecting plates that helical blade arranged, double helix blade is through a plurality of connecting plates and shaft body coupling, and double helix blade is through a plurality of even boards and shaft body coupling that arrange along helical blade, improves the screw axis and stirs efficiency to kitchen garbage leachate.

As preferred scheme, still include the oil water pond, the inlet of oil water pond and the liquid phase exit linkage of shaker, the oil water pond includes the slope pond and sets up in the pump pit of slope bottom of the pool portion, is equipped with heating tank charge pump in the pump pit, and the liquid outlet of heating tank charge pump is connected with the feed inlet of heating tank.

As an example, the oil-water pool is of a concrete structure, the surface of the oil-water pool is provided with an asphalt anticorrosive layer for storing filtrate with solid content of 7-8%, the grain diameter of the material is less than 2mm, the PH is 2-7, a pump pit is arranged in the pool for placing a heating tank feeding pump, and the bottom of the oil-water pool is inclined towards the pump pit, and the inclination angle is more than 2 degrees.

As a preferred scheme, a rotary stirrer is arranged in the center of the oil water tank, a first liquid level switch is arranged on a blade of the rotary stirrer, and when the liquid level in the oil water tank is lower than that of the blade, the first liquid level switch controls the stirrer to stop rotating;

the top in the oil water pond is equipped with the second liquid level switch, and when the liquid level in the oil water pond was higher than second liquid level switch, the second liquid level switch control shaker stop motion.

As an example, the first liquid level switch and the second liquid level switch are radar liquid level meters and are used for measuring the filtrate liquid level in the oil-water pool, a rotary stirrer is arranged in the center of the oil-water pool, when the liquid level is 200mm above the blades of the rotary stirrer, the first liquid level switch controls the rotary stirrer to stop rotating, and when the filtrate liquid level is 200mm away from the top of the pool, the second liquid level switch controls the front-end equipment to operate and give an alarm.

As a preferred scheme, the number of the heating tanks is two, and the first controller controls the two heating tanks to be opened and closed alternately in sequence, so that the heating tanks respectively finish feeding, heating and discharging alternately;

the heating tank includes: a heating tank body, a stirrer and a steam heating pipeline; the top of the heating tank body is provided with a feeding hole, and the bottom of the heating tank body is provided with a discharging hole; the stirrer is arranged at the top of the heating tank body, a stirring shaft of the stirrer extends into the heating tank body, and the lower end part of the stirring shaft is provided with stirring blades; the steam heating pipeline is arranged in the heating tank body and used for heating the materials. The filter liquor enters the tank body through the feed inlet, the filter liquor in the tank body is heated through the steam heating pipeline, the filter liquor in the tank body is uniformly heated through the stirrer, so that the heating efficiency of the filter liquor is improved, and the filter liquor after being heated is conveyed to subsequent equipment from the discharge port to be subjected to oil separation.

As an example, two adding tanks are alternately used, the heating tank is made of stainless steel 304, the bottom of the heating tank is in a conical design, the taper is 30 degrees, steam is directly introduced into the heating tank to directly heat filtrate in the tank, the heating tank is provided with a stirrer, the stirrer is provided with three layers of blades, the distance between the lowest layer of blade and the bottom conical section is 150mm, so that the blockage of the material due to deposition is prevented, the stirrer is arranged eccentrically, the distance between the center of the stirrer and the center of the heating tank is 150mm, so that the nonuniform stirring caused by laminar flow is prevented, and the temperature of the filtrate after passing through the heating tank reaches 66-80 ℃.

As a preferred scheme, the filter screen further comprises a wastewater pool, and the first water outlet and the second water outlet are respectively connected with the wastewater pool and used for recovering the wastewater of the filtrate oil-water separation.

As an example, heated filtrate is sent into a horizontal centrifuge by a screw pump, a screw pump stator adopts nitrile rubber to meet the high temperature requirement of material temperature of 70-80 ℃, and the solid content is 7% -8%; the rotor is coated with a chromium coating by adopting a stainless steel 304 material, and the thickness of the chromium coating is not less than 20 mu m.

As preferred scheme, oil water separator includes the jar body and sets up in the heating coil of jar external wall, and heating coil is used for heating the jar body.

As preferred scheme, heating coil is connected with steam conduit, still includes temperature sensor and second controller, and temperature sensor is used for detecting the internal temperature of jar, and the valve that controller control steam conduit according to temperature sensor's detection temperature control is opened and is closed.

As an example, the oil-water separator is a cylindrical tank body, the bottom of the oil-water separator is designed to be conical, a heating coil is arranged outside the wall of the tank body, the heating coil is a seamless steel pipe with the diameter of 20mm and the thickness of 3mm, one end of the heating coil is connected with a steam pipeline through a check valve, a pneumatic ball valve and a manual ball valve, and a manual ball valve and a drain valve are arranged at the outlet of the coil.

When the temperature sensor of the oil-water separator detects that the temperature is lower than 20 ℃, a signal is transmitted by the temperature sensor, and the pneumatic ball valve is opened to lead the steam into the heating coil to heat the tank body.

Example 1

Fig. 1 shows the structural schematic diagram of kitchen garbage leachate grease extraction system in an embodiment of the utility model, fig. 2 shows the utility model discloses shaker structural schematic diagram in an embodiment, fig. 3 shows the screw axis in an embodiment of the utility model, fig. 4 shows the utility model discloses oil water separator's in an embodiment internal structure schematic diagram, fig. 5 shows the utility model discloses oil water separator's in an embodiment external structure schematic diagram, fig. 6 shows the structural schematic diagram of the heating tank in an embodiment of the utility model.

As shown in fig. 1 to 6, the kitchen waste leachate grease extraction system of this embodiment includes: the impurity removing machine 3 is used for filtering impurities of the kitchen waste leachate, and the filtrate of the kitchen waste leachate after impurity filtering is discharged from the liquid phase outlet 26; the filter comprises an oil water tank 4, wherein a liquid inlet of the oil water tank 4 is connected with a liquid phase outlet 26 of the impurity removing machine, the oil water tank 4 comprises an inclined tank and a pump pit arranged at the bottom of the inclined tank, a heating tank feeding pump 5 is arranged in the pump pit, a liquid outlet of the heating tank feeding pump 5 is connected with a feeding hole of a heating tank 6, and a heating pipe 6 is used for heating filtrate; a liquid inlet of the centrifuge 8 is connected with a liquid outlet of the heater 6, the centrifuge 8 is used for centrifuging the filtrate, and the centrifuge 8 is provided with a first water outlet and an oil drain outlet; the liquid inlet of the oil-water separator 10 is connected with the oil outlet, and is used for extracting grease from the filtrate, and the bottom of the oil-water separator 10 is provided with a second water outlet 46. The wastewater tank 9, the first drain port and the second drain port 46 are connected to the wastewater tank 9, respectively.

The slurry pool 1 collects and mixes the kitchen waste leachate, and the kitchen waste leachate is conveyed to the impurity remover 3 through the impurity remover feed pump 2, so that large-particle impurities in the kitchen waste leachate can be screened out. The filtrate after impurity screening enters an oil water tank 4, the materials are sent into a heating tank 6 through a heating tank feeding pump 5, the filtrate is heated, the viscosity of the filtrate is reduced, and the centrifugal separation of oil and water is facilitated; then the heated filtrate is conveyed to a centrifugal machine 8 by a screw pump 7 through a pipeline 11, the centrifugal machine 8 carries out oil and water centrifugal treatment on the filtrate, oil in the filtrate is separated, then the oil is conveyed to an oil-water separator 10, the separated wastewater is conveyed to a wastewater pool 9 through a first water discharge port, and the separated waste residue is conveyed to a designated position. The oil-water separator 10 heats oil, after standing for a period of time for layering, oil on the upper layer is taken, separated water is discharged from a second outlet at the bottom, and the oil is output through an oil transfer pump 12.

A rotary stirrer is arranged in the center of the oil-water pool 4, a liquid level meter 13 is arranged on the oil-water pool and used for detecting the liquid level height in the oil-water pool, a first liquid level switch is arranged at the lower part of a blade of the rotary stirrer, and when the liquid level in the oil-water pool 4 is lower than the blade, the first liquid level switch controls the rotary stirrer to stop rotating; the top in oil water pond 4 is equipped with the second liquid level switch, and when the liquid level in the oil water pond was higher than the second liquid level switch, the operation stop of second liquid level switch control shaker 3. As shown in fig. 2-3, the trash separator 3 includes a screw shaft 27 horizontally disposed and a screen 23 sleeved outside the screw shaft 27, the upper portion of the screw shaft 27 is provided with a material inlet 22, a liquid phase outlet 26 is disposed at the lower portion of the screen 23, one end of the screw shaft 27 is connected with a motor 21, the motor 21 is used for driving the screw shaft 27 to rotate around the axis thereof, and the other end of the screw shaft 27 is provided with a solid phase trash outlet 24.

The screw shaft 27 includes a shaft body 33 and a double helical blade 31 provided around the shaft body, the double helical blade 31 being symmetrically arranged around the shaft body 33. A plurality of connecting plates 32 arranged along the helical blade 31 are arranged between the double helical blade 31 and the shaft body 33, and the double helical blade 31 is connected with the shaft body 33 through the plurality of connecting plates 32. The number of the heating tanks 6 is two, and the first controller sequentially controls the two heating tanks 6 to be alternately opened and closed, so that the heating tanks 6 respectively and alternately complete feeding, heating and discharging;

the heating tank 6 includes: a heating pipe tank 106, a stirrer 103 and a steam heating pipeline 111; the top of the heating tube tank body 106 is provided with a feeding hole 115, and the bottom is provided with a discharging hole 109; the stirrer 103 is arranged at the top of the heating pipe tank 106, a stirring shaft of the stirrer 103 extends into the heating pipe tank 106, and the lower end part of the stirring shaft is provided with stirring blades; the steam heating pipeline 111 is disposed in the heating pipe tank 106 and used for heating the material.

As shown in fig. 4 and 5, the oil water separator 10 includes a tank 41 and a heating coil 53 provided on an outer wall of the tank 42, and the heating coil 53 is used to heat the tank 41.

The oil-water separator 10 is a cylindrical tank body, the bottom of the oil-water separator is designed to be conical, a heating coil 53 is arranged outside the tank body 41, one end of the heating coil 53 is connected with a steam pipeline through a check valve 51, a pneumatic ball valve 50 and a manual ball valve 49, a steam inlet 56 is provided with the manual ball valve 49 and a drain valve 52, and the drain valve 52 discharges condensed water into a drain 55 through a condensed water outlet 54.

The heating coil 53 is connected with the steam pipeline, the heating coil further comprises a temperature sensor 43, the temperature sensor 43 is used for detecting the temperature in the tank body 41, the second controller controls the opening and closing of a valve of the steam pipeline according to the temperature detected by the temperature sensor 43, when the temperature detected by the temperature sensor 43 of the oil-water separator 10 is lower than 20 ℃, the temperature sensor 43 sends out a signal, the pneumatic ball valve 47 is opened to lead steam into the heating coil 53 to heat the tank body 41, and the tank body 41 further comprises a temperature meter 43.

A pressure sensor 44 and a thermometer 43 are arranged at the bottom of the oil-water separator 10, an oil outlet 45 of the oil-water separator is connected with an oil transfer pump 48, a pneumatic knife gate valve is arranged in a pipeline, when the liquid level of the oil-water separator 10 is 150mm away from the top, the pressure sensor 44 outputs a signal, and a second controller stops the operation of the centrifuge; when the liquid level is 50mm away from the bottom, the pressure sensor 44 outputs a signal, and the second controller stops the pneumatic knife switch valve from opening and stops the oil transfer pump from running.

When the system is used, the impurity removing machine 3 is started firstly, and the feeding pump 2 of the impurity removing machine is started after the impurity removing machine 3 enters the normal rotating speed; the materials pass through an impurity removing machine and then enter an oil water tank 4; the materials are sent into a heating tank 6 by a heating tank feeding pump 5, the materials are sent into a centrifuge 8 by a screw pump 7 after being heated, and oil liquid separated by the centrifuge is sent into an oil-water separator 10; the separated waste water is fed into a waste water tank 9 by gravity flow.

Example 2

Fig. 6 shows a schematic structural diagram of a heating tank in an embodiment of the present invention, fig. 7 shows a top view of the heating tank in an embodiment of the present invention, fig. 8 shows a schematic piping connection diagram of the heating tank in an embodiment of the present invention, fig. 9 shows a schematic structural diagram of a main pipe for steam heating in an embodiment of the present invention, and fig. 10 shows a schematic connection diagram of a main pipe for steam heating and a steam heating pipe in an embodiment of the present invention.

As shown in fig. 6 to 10, the heating tank of the present embodiment includes: two heating tanks; the feed inlet 115 of each heating tank is connected with the feed pipe 121 through the automatic feed valve 120, the discharge outlet 109 of each heating tank is connected with the feed pipe through the automatic discharge valve 123, and the controller alternately controls the automatic feed valve 120, the automatic steam valve 118 and the automatic discharge valve 123 of the two heating tanks to be alternately opened and closed, so that the two heating tanks alternately complete the feeding, heating and discharging work. This kitchen garbage leachate heating device includes:

a heating tank body 106, wherein the top of the heating tank body 106 is provided with a feeding hole 115, the bottom of the heating tank body 106 is provided with a discharging hole 109, the diameter of the heating tank body 106 is 2200mm, the height of the heating tank body 106 is 2000mm, and the bottom of the heating tank body 106 is conical; the stirrer 103 is arranged at the top of the heating tank body 106, a stirring shaft of the stirrer 103 extends into the heating tank body 106, a stirring blade is arranged at the lower end part of the stirring shaft, and the axis of the stirring shaft is parallel to and does not coincide with the axis of the heating tank body 106; the steam heating pipeline 111 is arranged in the heating tank body 106, and the steam heating pipeline 111 is used for heating the material.

The steam heating pipeline 111 comprises four steam heating sub-pipes 126 and a steam heating main pipe 125 connected with the four steam heating sub-pipes 116, the steam heating main pipe 125 extends into the heating tank body 106 from the top of the heating tank body 106, the four steam heating sub-pipes 126 are arranged at the bottom of the heating tank body 106 and are perpendicular to the axis of the heating tank body 106, and a plurality of steam discharging holes are formed in the lower side wall of each steam heating sub-pipe 126; the top of the heating tank body 106 is provided with a steam interface 104, a main steam heating pipe 125 is connected with a steam feeding pipeline 119 through the steam interface 104, and the steam feeding pipeline 119 is provided with a steam automatic valve 118. The steam feed pipeline is also provided with a manual valve, the manual valve is in a normally open state, and when the automatic steam valve is damaged, the manual valve can be used for controlling the opening and closing of the steam feed pipeline, so that the automatic steam valve is convenient to replace or maintain.

The outer diameter of the steam heating sub-pipe is phi 2000mm, and the distance between the steam discharge holes which are uniformly distributed along the circumferential direction is 9 degrees. An included angle of 60 degrees is formed between the two rows of steam discharge holes, and the diameter of each steam discharge hole is phi 6 mm.

The steam heating sub-pipe 126 is a disk-shaped annular pipe, two rows of steam discharge holes 127 are arranged on the disk-shaped annular pipe, and the two rows of steam discharge holes 127 are symmetrically arranged along the diameter of the disk-shaped annular pipe. The steam feeding pipeline 119 is further provided with a manual steam valve 117, the manual steam valve 117 is in a normally open state, and when the automatic steam valve 118 is damaged, the manual steam valve 117 can be used for controlling the opening and closing of the steam feeding pipeline, so that the automatic steam valve can be conveniently replaced or maintained.

The feeding port 115 is provided with a feeding pipe 121, the discharging port 109 is provided with a discharging pipe 124, the feeding pipe 121 is provided with an automatic feeding valve 120, the discharging pipe 124 is provided with an automatic discharging valve 123, the discharging pipe 124 is provided with a manual discharging valve 122 in a normally open state, the manual discharging valve 22 is manually closed when the automatic discharging valve 123 is damaged, and the automatic discharging valve is convenient to replace or maintain.

The kitchen waste leachate heating device further comprises a temperature sensor 114 and a controller, wherein the temperature sensor 114 is used for detecting the material temperature in the heating tank body 106, and the controller controls the automatic discharging valve 123 to be opened and closed according to the material temperature detected by the temperature sensor 114. Still include liquid level switch 107, liquid level switch 107 sets up in the top of the heating tank jar body 106, and liquid level switch 107 is connected with automatic valve 120 of feeding, ejection of compact automatic valve 123, steam automatic valve 118 respectively, and when the liquid level height in the heating tank jar body 106 reached the liquid level upper limit of the heating tank jar body 106, liquid level switch 107 control automatic valve 120 of feeding, ejection of compact automatic valve 123, steam automatic valve 110 close.

This kitchen garbage leachate heating device still includes level gauge 112, and level gauge 112 sets up in the inner wall of the heating tank jar body 106 for detect the liquid level height in the heating tank jar body 106, the controller is according to the liquid level height control feeding automatic valve 120 that level gauge 112 detected and close and control steam automatic valve 118 and open.

This kitchen garbage leachate heating device still includes deodorization system, and the top of the heating jar body 106 is equipped with deodorization mouth 116, and deodorization system is connected with deodorization mouth 116 for dispel the foul smell gas in the jar body 106.

The top of the heating tank body 106 is provided with a ladder 101, a railing 102 and a platform 105, so that personnel can conveniently climb to the top of the heating tank body 106 for maintenance, the bottom of the heating tank body 106 is provided with a manhole 110 and a drain 108, so that after materials are drained from the drain 108, the personnel can conveniently enter the heating tank body 106 from the manhole 110 to maintain the interior of the heating tank body 106, and the heating tank body 106 is provided with a thermometer 13.

The heating device is applied to heating kitchen waste leachate squeezed by a screw extruder, the solid content of the kitchen waste leachate is not more than 10%, the particle size of the material is not more than 2mm, 5 tons of the kitchen waste leachate is heated per hour, 0.4Mpa and 144 ℃ saturated steam are required to be supplied to the outside, 0.6-0.7Mpa of industrial compressed air and-100 Kpa of 100m3/h of deodorizing air volume.

When the system works, materials enter a heating tank body 106 through a feeding pipe 121, the feeding time is set to be 15 minutes, and when the material liquid level is 300mm away from the tank top, a liquid level meter 112 sends a signal to close an automatic feeding valve 120; starting the automatic steam valve 118, introducing steam into the materials, starting the stirrer 103, heating the materials to 60-70 ℃ in 45 minutes, sending a signal by the temperature sensor 114, and opening the automatic discharging valve 123 for discharging; when the heating tank body 106 of one heating device is heated, the heating tank body 106 of the other device finishes feeding and starts heating, and the heating is alternately carried out, so that the heating efficiency of the material is improved.

While various embodiments of the present invention have been described above, the above description is intended to be illustrative, not exhaustive, and not limited to the disclosed embodiments. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments.

Claims

1. The utility model provides a kitchen garbage leachate grease extraction system which characterized in that includes:

the feed inlet of the heating tank is connected with the liquid phase outlet of the impurity remover, and the heating tank is used for heating the filtrate;

a liquid inlet of the centrifuge is connected with a discharge hole of the heating tank, the centrifuge is used for centrifuging the filtrate, and the centrifuge is provided with a first discharge hole and an oil discharge hole;

2. The kitchen garbage leachate grease extraction system of claim 1, wherein the impurity remover comprises a screw shaft and a screen, the screw shaft is horizontally arranged, the screen is sleeved outside the screw shaft, a material inlet is formed in the upper portion of the screw shaft, the liquid phase outlet is formed in the lower portion of the screen, one end of the screw shaft is connected with a driving device, the driving device is used for driving the screw shaft to rotate around the axis of the screw shaft, and a solid phase impurity outlet is formed in the other end of the screw shaft.

3. The kitchen waste leachate grease extraction system of claim 2, wherein the screw shaft comprises a shaft body and double helical blades arranged around the shaft body, and the double helical blades are symmetrically arranged around the shaft body.

4. The kitchen garbage leachate grease extraction system of claim 3, wherein a plurality of connecting plates arranged along the helical blade are arranged between the double helical blade and the shaft body, and the double helical blade is connected with the shaft body through the plurality of connecting plates.

5. The kitchen garbage leachate grease extraction system of claim 1, further comprising an oil water tank, wherein a liquid inlet of the oil water tank is connected with the liquid phase outlet of the impurity removal machine, the oil water tank comprises a tilting tank and a pump pit arranged at the bottom of the tilting tank, a heating tank feeding pump is arranged in the pump pit, and a liquid outlet of the heating tank feeding pump is connected with a feed inlet of the heating tank.

6. The kitchen garbage leachate grease extraction system as recited in claim 5, wherein a rotary stirrer is arranged in the center of the oil-water tank, a first liquid level switch is arranged on a blade of the rotary stirrer, and when the liquid level in the oil-water tank is lower than the blade, the first liquid level switch controls the stirrer to stop rotating;

7. The kitchen garbage leachate grease extraction system as claimed in claim 1, wherein the number of the heating tanks is two, and the first controller controls the two heating tanks to be alternately opened and closed in sequence, so that the heating tanks respectively and alternately complete feeding, heating and discharging;

8. The kitchen waste leachate grease extraction system of claim 1, further comprising a wastewater tank, wherein the first drain port and the second drain port are connected to the wastewater tank respectively.

9. The kitchen waste leachate grease extraction system of claim 1, wherein the oil-water separator comprises a tank body and a heating coil arranged on the outer wall of the tank body, and the heating coil is used for heating the tank body.

10. The kitchen waste leachate grease extraction system of claim 9, wherein the heating coil is connected to a steam pipeline, and further comprising a temperature sensor and a second controller, wherein the temperature sensor is used for detecting the temperature in the tank body, and the second controller controls the opening and closing of a valve of the steam pipeline according to the detection temperature of the temperature sensor.