CN215587463U - Efficient sand and impurity removing and oil extracting system for kitchen waste - Google Patents

Abstract

The utility model relates to a high-efficiency sand and impurity removing and oil extracting system for kitchen waste, which comprises a material receiving bin, a roller screening machine, a screw extruder, a slurry pool, an impurity removing machine, a sand removing machine, a heating tank and a three-phase centrifuge. After separation, the produced oil phase can be used as raw materials of products such as biodiesel, organic residues can be used as raw materials of compost, insect culture and anaerobic fermentation, water is directly subjected to anaerobic fermentation, and fermented biogas can be used for generating power or purifying to prepare natural gas. After treatment, the water content of the kitchen waste is reduced to 60 percent from the original water content of about 80 percent, and the oil content is reduced to below 0.1 percent from 3 to 5 percent.

Description

Efficient sand and impurity removing and oil extracting system for kitchen waste

Technical Field

The utility model belongs to the technical field of kitchen waste treatment, and particularly relates to a high-efficiency sand and impurity removing and oil extracting system for kitchen waste.

Background

The prior invention patent number: CN201620807091.4 is a complete sets for kitchen garbage preliminary treatment edulcoration, oil extraction and slurrying, is a complete sets through kitchen garbage preliminary treatment edulcoration, oil extraction and slurrying, and it includes receiving hopper, big material sorting machine, subdivision selection all-in-one, thick liquids storage tank, slurrying and light material separation all-in-one, thick liquids buffer tank, screw press, whirl degritting machine, damp and hot hydrolysis jar, two-phase centrifuge, three-phase centrifuge. Carry out the multiple edulcoration of meticulous layering to kitchen garbage step by step through each equipment cooperation, set up two-phase centrifuge before three-phase centrifuge, reduce three-phase centrifuge work load, reduce three-phase centrifuge's wearing and tearing, increased its life, improved three-phase centrifuge simultaneously and carried the purity of oil.

In the existing kitchen waste treatment process, a large amount of grease is taken away by sundries, the oil extraction rate is low, the purpose of treating and recycling kitchen waste cannot be realized, and a water phase generated in the treatment of the kitchen waste cannot be reused, so that great resource waste is caused.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a method and a system for efficiently removing sand, impurities and oil from kitchen waste, which aim to solve the problems that in the prior art, in the treatment process of the kitchen waste, a large amount of grease is taken away by impurities, the oil extraction rate is low, the aim of recycling the kitchen waste is not realized, and in addition, the water phase generated in the treatment of the kitchen waste cannot be repeatedly utilized, so that the great resource waste is caused.

In order to achieve the purpose, the utility model provides the following technical scheme:

the utility model provides a high-efficient edulcoration system of carrying oil that removes sand of kitchen garbage, includes multiple filter assembly, three-phase centrifuge, multiple filter assembly is equipped with debris export and filtrating export, the debris export be used for with the filterable debris of multiple filter assembly are discharged, filtrating exit linkage three-phase centrifuge, three-phase centrifuge is equipped with water phase export, slag phase export and oil phase export, oil phase exit linkage oil storage tank, the slag phase export is connected with external compost device, water phase exit linkage anaerobism feeding buffer memory pond, the water phase export still is equipped with backflow pipeline, backflow pipeline with multiple filter assembly connects.

Preferably, the multiple filtering component comprises a material receiving bin, a roller screening machine, a screw extruder, an impurity removing machine and a sand removing machine which are sequentially connected, wherein the sand removing machine is connected with the three-phase centrifugal machine, and a heating tank is further connected between the sand removing machine and the three-phase centrifugal machine.

Preferably, a first slurry pool is connected between the screw extruder and the impurity removing machine, the material receiving bin is provided with a filtrate outlet and a kitchen waste outlet, the filtrate outlet is connected with the first slurry pool, the kitchen waste outlet is connected with the rotary screening machine, and the kitchen waste outlet is used for discharging kitchen waste after water filtration.

Preferably, a fourth slurry pool is arranged between the three-phase centrifuge and the anaerobic feeding buffer pool, the backflow pipeline is arranged in the fourth slurry pool, and the backflow pipeline is connected with the material receiving bin.

Preferably, the roller screening machine is further provided with a large-substance sundry outlet, the screw extruder is further provided with an organic-substance sundry outlet, the impurity removing machine is further provided with a light-floating sundry outlet, the sand removing machine is further provided with a heavy-substance sundry outlet, and the large-substance sundry outlet, the organic-substance sundry outlet, the light-floating sundry outlet and the heavy-substance sundry outlet jointly form the sundry outlet.

Preferably, the large-substance impurity outlet, the organic matter impurity outlet, the light-floating impurity outlet and the heavy-substance impurity outlet are all connected to the external incinerator.

Preferably, a regulating valve is arranged between the three-phase centrifuge and the heating tank and used for regulating the feeding amount of the three-phase centrifuge.

Preferably, a second slurry pool is connected between the impurity removing machine and the sand removing machine, and a third slurry pool is connected between the sand removing machine and the heating tank.

The utility model has the advantages that: the utility model discloses a high-efficiency sand-removing impurity-removing oil-extracting system for kitchen waste, which is characterized in that a material receiving bin, a roller screening machine, a screw extruder, a slurry pool, an impurity-removing machine, a sand-removing machine, a heating tank, a three-phase centrifuge and other equipment are used in a combined manner to realize the steps of material receiving and conveying, roller screening, extruding, impurity-removing, sand-removing, oil-extracting and the like for the kitchen waste to remove moisture, impurities and sand in the kitchen waste, the kitchen waste is pretreated, the produced oil phase can be used as the raw materials of biodiesel and other products after separation, organic residues can be used as the raw materials of composting, insect-nourishing and anaerobic fermentation, water is directly subjected to anaerobic fermentation, the fermented methane can be used for generating electricity or purifying natural gas, and the water phase in the operation process can be recycled by refluxing to the roller, so that the maximum resource utilization of the kitchen waste is achieved.

Drawings

FIG. 1 is a flow chart of a process provided by the present invention;

FIG. 2 is a process flow for treatment provided by the present invention;

FIG. 3 illustrates a processing method according to the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

The following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The utility model provides a high-efficiency sand and impurity removing and oil extracting method for kitchen waste, which comprises the following steps:

s1, filtering the kitchen waste by a material receiving bin and arranging a filter screen at the bottom of the material receiving bin to filter oil and water in the kitchen waste;

s2, screening and extruding the kitchen waste, and sequentially removing large substance impurities and inorganic substance impurities in the kitchen waste to obtain slurry;

s3, removing impurities and sand from the slurry, and removing light floating substances and heavy substances in the slurry in sequence;

s4, heating the second slurry to 85-90 ℃, and then carrying out three-phase centrifugation to separate the second slurry into a water phase substance, an oil phase substance and a slag phase substance;

s5, storing the separated oil phase substances into an oil storage tank to serve as raw materials of products such as biodiesel, performing composting, insect feeding and anaerobic fermentation on the separated slag phase substances, and feeding the separated water phase substances into an anaerobic feeding cache tank to ensure the anaerobic fermentation temperature, so that the kitchen waste is treated and recycled;

and refluxing a part of the separated water phase substances to a drum screening machine for recycling.

And carrying out centralized outward incineration on the separated large substance impurities, organic matter impurities, light floating substances and heavy substances.

According to the efficient sand and impurity removing and oil extracting method for the kitchen waste, the utility model also provides an efficient sand and impurity removing and oil extracting system for the kitchen waste, which comprises a material receiving bin 1, a rotary screen 2, a screw extruder 3, a slurry pool, an impurity remover 5, a sand remover 6, a heating tank 7 and a three-phase centrifuge 8, wherein the kitchen waste truck discharges materials into the material receiving bin 1, a water filtering device is arranged at the bottom of the material receiving bin 1 to filter liquid of the kitchen waste, and filtrate flows into the first slurry pool 41 through a pipeline. Kitchen garbage after the drainage, through connecing the bottom spiral of feed bin 1 to send into drum screen 2, drum screen 2 is the mesh size and is 50mm screen cloth and be furnished with the guide plate, gets rid of the bulky material impurity in the kitchen garbage for example: impurities such as glass bottles, plastic bottles, cloth pieces and the like are sprayed back to the drum screen by hot water after oil extraction, so that the impurities containing grease are washed into undersize; the undersize material after passing through the drum screening machine 2 enters a screw extruder 3 to strongly extrude organic matters, the screw extruder 3 is provided with a front end water filtering section with 6mm meshes and a rear end extruding section with 3mm meshes, impurities in the kitchen waste are further removed, the extruding efficiency is improved due to the backflow of hot water, and the filtered liquid after extrusion is sent to a first slurry pool 41; the first slurry pool 41 slurry enters the automatic impurity removing machine 5 by pumping, the upper part of the equipment is rectangular, the lower half part of the equipment is a buffer storage bin with an inverted trapezoidal structure, a scum baffle is arranged in the buffer storage bin, a shaftless spiral is arranged at the bottom, a hydraulic scum push plate is arranged on the side surface, the first slurry pool 41 slurry is separated in the buffer storage bin by self weight, sand sinks at the bottom of the buffer storage bin and is removed by shaftless spiral conveying, scum is blocked behind the baffle and is discharged by the push plate, water phase bypasses the scum push plate and is discharged from an outlet, light floating substances such as fibers, plastics and heavy substance sediment and the like in the slurry are removed by the automatic impurity removing machine 5, and the slurry automatically flows into the second slurry pool 42; the second slurry pool 42 is pumped into the automatic sand remover 6, the equipment is provided with a feeding buffer tank for feeding and mixing with materials after sand removal, the mixed materials pass through a sand setting box and then enter a front sand remover through a pump for sand-water separation, then enter a cyclone sand remover for sand removal again, the water after cyclone enters a rear sand remover for sand removal again, then enter a feeding buffer tank, the buffer tank is discharged with water outwards 1/3, the rest 2/3 continues to circulate inside, the sand in the sand setting box, the front sand remover, the cyclone sand remover and the rear sand remover is all discharged into a cyclone sand remover sand collecting device and is sent into a cleaning workshop through a screw, the automatic sand remover 6 removes heavy materials such as sand stones, egg shells and the like in the slurry, the removal rate is high, and the slurry automatically flows into the third slurry pool 43; the third slurry tank 43 slurry enters the heating tank 7 through the pumping, a steam direct injection device is arranged in the heating tank 7, the heating efficiency is improved, an overflow pipeline is arranged, the overflow enters the first slurry tank 41, the materials are heated to 85-90 degrees in the heating tank 7, the materials are pumped to the three-phase centrifuge 8 for oil extraction, and the oil phase enters the temporary oil storage tank for temporary storage.

The kitchen waste receiving, conveying and solid-liquid coarse separation system comprises a waste receiving hopper and a hopper bottom conveying spiral, wherein the hopper bottom conveying spiral is provided with two spirals with the inner diameter of 500mm for standby use, the spiral is obliquely arranged at an angle of 15-30 degrees, a filter screen is arranged at the bottom of the spiral, a water phase enters a first pool through the filter screen, a water isolation cabin is arranged at the bottom of the spiral for tail drainage, and the highest liquid level of a storage bin is lower than the height of a spiral outlet by 0.5 degrees.

The barrel screening machine is internally provided with a spacing guide plate to ensure that the materials are uniformly conveyed forwards, the diameter of a sieve pore is 40mm, the upper half part of the drum screen is provided with a spraying device, hot water is sprayed back to extract oil, oil content adhered to the materials is washed into a liquid phase, the oil extraction rate of the kitchen waste is improved, and the effect of cleaning the screen is achieved.

Screw extruder 3, the screw axis adopts the stainless steel plate of low alloy steel outer cladding, stainless steel plate is 304 materials, thickness 3mm, with the ring dress welding on the axle, the ring width is not more than 30mm, the discharge end welding wear-resisting alloy steel ZG40CrMnMoNiRe of axle, the stainless steel ring is referred to the size, helical blade welds on the stainless steel ring of screw axis, helical blade sheet matter stainless steel 304, blade thickness 20-40mm, discharge end helical blade surface installs wear-resisting alloy steel ZG40CrMnMoNiRe piece additional, increase spiral life, the width becomes gradually-changed structure from the left end to the right-hand member, gradually-changed size 51-24mm, in order to satisfy the moment of torsion demand that mechanical extrusion produced.

The screw extruder 3 is characterized in that a screen of a screw press is divided into two sections, and the mesh of a first section screen is 6 mm; the mesh of the second section of screen cloth is 3mm, the screen cloth is 500x6mm for the first section size of grid-type screen cloth, and the second section size is 500x3mm, and the screen cloth adopts 5 x 5 square steel, and the first section screen cloth mainly uses to filter for giving first place to, and the second section screen cloth is mainly used to filter and extrudeing, and the screen cloth adopts wafer formula installation, conveniently overhauls, and the design can be with high improvement extrusion efficiency like this.

The thick liquid pond adopts concrete structure, and the surface sets up the anticorrosive coating, sets up the pump pit, and thick liquid pond bottom of the pool inclines to the pump pit, and inclination is greater than 2, and thick liquid pond top sets up radar level gauge and agitator for measure thick liquid level and mixing material, prevent that fine sand deposit and light material from floating, the material is at the thick liquid pond layering. The stirrer is designed in a large flow mode, two layers of blades are arranged on the lower portion, the middle portion and the upper portion, the stirrer blades are in a special-shaped shape, and the shape of the stirrer blades is shown in drawings, so that the stirrer is guaranteed to be large in pushing flow, low in rotating speed and stable in operation.

The upper part of the impurity removing machine 5 is rectangular, the lower half part of the impurity removing machine is of an inverted trapezoidal structure, an impurity baffle is arranged in the impurity removing machine, a shaftless spiral is arranged at the bottom of the impurity removing machine, a hydraulic impurity pushing plate is arranged on the side face of the impurity removing machine, supplied materials are separated in the impurity removing machine through dead weight, heavy objects sink to the bottom of the impurity removing machine and are removed through shaftless spiral conveying, the light floating impurities are blocked behind the baffle and are discharged through the pushing plate, and a water phase bypasses the impurity pushing plate and is discharged from an outlet. The device is simple, easy to operate, occupies a small area, does not need to increase washing water independently, and greatly reduces the power consumption and the water consumption compared with the prior equipment and the prior art.

The sand remover 6 is provided with a feeding buffer tank, a delivery pump, a sand setting tank, a front sand remover, a rotational flow sand remover, a rear cyclone and a drain pipe, the feeding of the device enters the feeding buffer tank, and then passes through the sand setting tank and the front sand remover by pumping to remove sand and stone, the water phase passes through the rear cyclone, after sand removal is carried out again, water 1/3 is discharged after sand removal, the circulation is continued in 2/3, and the sand removal rate is more than 95%.

Three-phase centrifuge 8 can be according to the feeding condition, and the design has adjusting device in feed inlet department, guarantees that the oil yield is more than 98%, and it has carbide to inlay on this three-phase oil extraction device helical blade, makes this three-phase centrifuge 8's life improve 30%.

All equipment control adopts DCS control, and each thick liquid pond is furnished with the level gauge, and each pump export is equipped with the flowmeter, and heating tank 7 has the thermometer, and each equipment remote monitoring and fault alarm device, each equipment remote operation of system, chain control, degree of automation is high.

The utility model provides a high-efficiency sand and impurity removing and oil extracting method for kitchen waste, which comprises the following steps:

the method comprises the following steps: the kitchen waste truck discharges materials into a material receiving bin, the material receiving bin is provided with a water filtering device for filtering liquid of the kitchen waste, and filtrate flows into a first slurry pool through a pipeline;

step two: kitchen garbage after the drainage is sent into drum screening machine through the bucket end spiral, and the impurity of drum screening machine in with kitchen garbage is got rid of for example: glass bottles, plastic bottles, cloth pieces and other impurities;

step three: feeding the materials passing through the roller screening machine into a screw extruder, strongly extruding organic matters to remove water in the kitchen waste, and feeding the filtrate into a first slurry pool;

step four: the slurry in the first slurry pool enters an automatic impurity removing machine through a pump to remove light floating substances such as fibers, plastics and the like in the slurry, and the slurry automatically flows into the second slurry pool;

step five: the slurry in the second slurry pool enters an automatic sand remover through a pump to remove heavy substances such as sand stones, egg shells and the like in the slurry, and the slurry automatically flows into a third slurry pool;

step six: and the third slurry pool slurry enters a heating tank through a pump, is heated to 85-90 ℃ in the heating tank, is sent to a three-phase centrifuge for oil extraction, an oil phase enters a temporary grease storage tank for temporary storage, a water phase enters a fourth tank, part of the oil phase flows back to a drum screening machine for raw material washing, part of the oil phase enters an anaerobic feed buffer tank, and a slag phase can be used as raw materials for composting, insect culture and anaerobic fermentation.

Step seven: the sundries sorted by the roller screening machine, the extrusion screw, the impurity removing machine and the sand removing machine are transported together and then enter an incineration plant for incineration.

After oil is extracted in the sixth step, part of hot water in the fourth tank is sprayed back to the drum screening machine to wash materials in the drum screening machine, so that the oil extraction rate is improved; one part of the mixture enters an anaerobic feeding buffer tank to ensure the anaerobic fermentation temperature; the three-phase separated slag phase can be used as raw materials for composting, insect breeding and anaerobic fermentation, and the recycling rate of the kitchen waste is improved.

The utility model has the beneficial effects that:

1. the method provided by the utility model is used for pretreating the kitchen waste in the modes of filtering, sorting large substances, extruding, removing impurities, removing sand and extracting oil, so that the maximum resource utilization of the kitchen waste is achieved. After separation, the produced oil phase can be used as raw materials of products such as biodiesel, organic residues can be used as raw materials of compost, insect culture and anaerobic fermentation, water is directly subjected to anaerobic fermentation, and fermented biogas can be used for generating power or purifying to prepare natural gas. After treatment, the water content of the kitchen waste is reduced to 60 percent from the original water content of about 80 percent, and the oil content is reduced to below 0.1 percent from 3 to 5 percent.

2. The utility model has the characteristics of good solid-liquid separation effect, high solid-phase solid content, high oil extraction efficiency, simple system, low energy consumption, safe and reliable operation, simple and convenient maintenance and operation, high system stability, long service life of equipment and the like.

The above disclosure is only for a few specific embodiments of the present invention, but the present invention is not limited thereto, and any variations that can be made by those skilled in the art are intended to fall within the scope of the present invention.

Claims (8)

1. The utility model provides a high-efficient edulcoration system of carrying oil that removes sand of kitchen garbage, a serial communication port, including multiple filter assembly, three-phase centrifuge, multiple filter assembly is equipped with debris export and filtrating export, the debris export be used for with the filterable debris of multiple filter assembly are discharged, the filtrating exit linkage three-phase centrifuge, three-phase centrifuge is equipped with aqueous phase export, slag phase export and oil phase export, oil phase exit linkage oil storage tank, the slag phase export is connected with external compost device, the anaerobic feed buffer pool is connected in the aqueous phase export, the aqueous phase export still is equipped with backflow pipeline, backflow pipeline with multiple filter assembly connects.

2. The efficient sand and impurity removing and oil extracting system for kitchen waste according to claim 1, wherein the multiple filtering assemblies comprise a material receiving bin, a roller screening machine, a screw extruder, an impurity removing machine and a sand removing machine which are sequentially connected, the sand removing machine is connected with the three-phase centrifugal machine, and a heating tank is further connected between the sand removing machine and the three-phase centrifugal machine.

3. The efficient sand and impurity removing and oil extracting system for the kitchen waste according to claim 2 is characterized in that a first slurry pool is connected between the screw extruder and the impurity removing machine, a filter liquor outlet and a kitchen waste outlet are formed in the material receiving bin, the filter liquor outlet is connected with the first slurry pool, the kitchen waste outlet is connected with the drum screening machine, and the kitchen waste outlet is used for discharging the kitchen waste after water filtration.

4. The efficient sand and impurity removing and oil extracting system for kitchen waste according to claim 2, wherein a fourth slurry pool is arranged between the three-phase centrifuge and the anaerobic feeding buffer pool, the backflow pipeline is arranged in the fourth slurry pool, and the backflow pipeline is connected with the material receiving bin.

5. The efficient sand and impurity removing and oil extracting system for kitchen waste as claimed in claim 2, wherein the roller screening machine is further provided with a large-substance impurity outlet, the screw extruder is further provided with an organic matter impurity outlet, the impurity removing machine is further provided with a light-floating impurity outlet, the sand removing machine is further provided with a heavy-substance impurity outlet, and the large-substance impurity outlet, the organic matter impurity outlet, the light-floating impurity outlet and the heavy-substance impurity outlet jointly form the impurity outlet.

6. The efficient sand and impurity removing and oil extracting system for the kitchen waste according to claim 5, wherein the large-substance impurity outlet, the organic-substance impurity outlet, the light-floating impurity outlet and the heavy-substance impurity outlet are all connected to an outward-conveying incinerator.

7. The efficient sand and impurity removing and oil extracting system for the kitchen waste according to claim 1, wherein a regulating valve is arranged between the three-phase centrifuge and the heating tank and used for regulating the feeding amount of the three-phase centrifuge.

8. The efficient sand and impurity removing and oil extracting system for kitchen waste according to claim 2, wherein a second slurry pool is connected between the impurity removing machine and the sand removing machine, and a third slurry pool is connected between the sand removing machine and the heating tank.

Images