WO2021098034A1

WO2021098034A1 - Salt floating equipment and method for removing lifting grip or handle of waste edible oil bottle (can)

Info

Publication number: WO2021098034A1
Application number: PCT/CN2020/071944
Authority: WO
Inventors: 陈浩; 冯善华; 顾跃中; 干卫新; 杨芬中; 蒋国新; 徐盛明; 吴金涛; 钱春燕
Original assignee: 浙江海利环保科技股份有限公司
Priority date: 2019-11-22
Filing date: 2020-01-14
Publication date: 2021-05-27
Also published as: CN110815647A

Abstract

A method for removing a lifting grip or a handle of a waste edible oil bottle (can) using salt floating equipment, comprising: crushing a lifting grip or a handle of an edible oil bottle (can), mixing same with a salt floating liquid, placing the mixture in a floating separation pool, dispersing same by a material dispersing device, and performing sinking-floating separation to obtain a sinking material and a floating material, the salt floating liquid comprising water and industrial salt in a mass ratio of 100:28; pushing the sinking material to a sinking material discharging auger conveyor by a sinking material pushing auger conveyor driven by a sinking material pushing motor for discharging and recycling; and pushing the floating material to a floating material discharging auger conveyor by a floating material pushing auger conveyor driven by a floating material pushing motor for discharging. By using the specific salt floating equipment in combination with a salt floating liquid to perform sinking-floating separation on PET and non-PET materials in lifting grips or handles of edible oil bottles (cans), a good separation effect can be achieved; the present method is convenient to use, nonharmful, pollution-free, and low in separation cost.

Description

Salt bleaching device and method for removing handles and handles of waste edible oil bottles (pots)

This application requires a Chinese patent application filed with the Chinese Patent Office on November 22, 2019, the application number is 201911154433.1, and the invention title is "a salt bleaching device and a method for removing the handle and handle of a waste edible oil bottle (kettle)". Priority, the entire content of which is incorporated in this application by reference.

Technical field

The invention relates to the technical field of food packaging, in particular to a salt bleaching device and a method for removing handles and handles of waste edible oil bottles (pots).

Background technique

Polyester (PET) bottles are the main force in food and beverage packaging. The world's annual production of polyester bottles is about 30 million tons, of which China is about 6 million tons. The old polyester bottles after consumption are extremely chemically inert and difficult to degrade under natural conditions, which not only causes a great burden on the global environment, but also causes a great waste of resources. Recycling polyester waste is of great significance for solving resource shortages, reducing the development of primary resources, reducing waste emissions, and achieving sustainable development.

At present, the recycling and reuse of old polyester bottles is first to clean and process them to produce recycled polyester bottle flakes, which are then used as raw materials for reuse, such as spinning recycled polyester fibers, food packaging, and so on. However, because the old polyester bottles have passed the market circulation, they have been polluted to a certain extent, mixed with impurities such as metal and sand; the old polyester bottles themselves have mixed colors, and most of the bottle attachments such as caps, handles, handles, and labels are non-polymerized. Ester material: PVC and PP plastic bottles are easily mixed in polyester (PET) bottles because of the same shape and color, and there are many difficulties in cleaning and processing. The recycled polyester bottle flakes produced have low product grades, poor quality stability, and low product quality: affecting subsequent recycling and reuse.

Cleaning and processing the old polyester bottles to become the raw material for the production of recycled polyester fibers is currently the most important resource reuse method. In China, due to eating habits, the proportion of edible oil bottles (pots) in old polyester bottles is relatively large, accounting for about 15-20%.

Edible oil bottles (pots), including vegetable oils such as golden dragon oil, soy sauce packaging bottles (pots), etc., are all equipped with handles or handles. The material of the bottle (pot) is mainly polyester (PET), and the materials of the handle and handle are ABS, PE, PP, PS, etc. The materials are complex and the density varies, and there is no certain rule for selection. And the handle is embedded in the bottle (pot), which is very difficult to handle.

At present, in the process of processing waste edible oil bottles (pots), it is necessary to completely separate the handle, handle and bottle (pot). The existing operation method is mainly to manually pry off the handle and cut the handle with scissors. It is time-consuming and labor-intensive, and the handling is not clean, which affects the quality of recycled polyester bottle flakes.

Summary of the invention

In view of this, the technical problem to be solved by the present invention is to provide a method for removing handles and handles of waste edible oil bottles (pots). The method provided by the present invention can separate polyester materials (bottle flakes) without manual separation. The handles, handles and other non-polyester materials are effectively separated, and the separation effect is good.

The present invention provides a salt bleaching device, including:

Flotation separation tank;

Feeding auger for feeding materials into the flotation separation tank;

A material dispersing device used to disperse the materials sent into the flotation separation tank and a dispersing motor driving the device;

Floating material advancing hinge used to push the floating material in the flotation separation tank to the floating material discharging hinge, and a floating material advancing motor used to drive the floating material advancing hinge;

Floating material discharging hinge used to send the floating material out of the device and the floating material discharging motor used to drive the floating material discharging hinge;

The sinker advancing hinge used to push the sinking material in the flotation separation tank to the sinker discharging hinge, and the sinker advancing motor used to drive the sinker advancing hinge;

A sinking material discharging hinge used to send the sinking material out of the device and a sinking material discharging motor used to drive the sinking material discharging hinge.

Preferably, the discharge end of the feed auger is connected with the material inlet of the flotation separation tank, and is obliquely pressed on the top edge of the flotation separation tank.

Preferably, the floating material propelling hinged dragons are arranged side by side on the upper part of the flotation separation tank; the floating material propelling hinged dragons are in three rows; the rotation direction of the spiral blades of the floating material propelling hinged dragons in the middle row and the direction of both sides in contrast.

Preferably, the floating material propelling motor is arranged on the side wall of the flotation separation tank; the floating material discharging hinge is connected with the floating material outlet of the flotation separation tank, and is arranged obliquely on the side wall of the flotation separation tank.

Preferably, both sides of the top of the flotation separation tank are respectively provided with a material inlet and a float outlet, and the bottom is provided with a sinker outlet.

Preferably, the sinking material propelling motor and the floating material advancing motor are arranged on opposite sides; the sinking material advancing hinged dragon is in a row; the sinking material advancing hinged dragon pushes the sinking material to the sinking material outlet; the sinking material The discharging hinge dragon is connected with the sinking material outlet.

The present invention provides a method for removing handles and handles of waste edible oil bottles (jugs) by using the salt bleaching device according to any one of the above technical solutions, including:

The handle and handle of the edible oil bottle (pot) are crushed and the salt bleaching liquid is mixed and placed in the flotation separation tank, and the material is dispersed by the material dispersing device, and the sinking and floating separation is carried out to obtain the sinking material and the floating material; the salt bleaching liquid is The mass ratio of water and industrial salt is 100:28;

The sinking material is pushed to the sinking material discharging hinge through the sinking material advancing hinge driven by the sinking material advancing motor for discharging and recycling;

The floating material is pushed to the floating material discharging hinged dragon for discharging by the floating material advancing hinge driven by the floating material advancing motor.

Preferably, the power of the material dispersing motor is 1.5kw, the power of the sinking propulsion motor is 2.2kw; the power of the float propulsion motor is 2.2kw; the power of the float discharging motor is 2.2kw; The power of the sinking discharging motor is 1.5kw.

Preferably, the sink-float separation temperature is 25-35°C.

Preferably, the density of the salt bleaching liquid is 1.15-1.16.

Compared with the prior art, the present invention provides a method for removing the handle and handle of a waste edible oil bottle (kettle) by using the salt bleaching device according to any one of the above technical solutions, which includes: putting the edible oil bottle (kettle) The handle and handle are crushed and the salt bleaching liquid is mixed and placed in the flotation separation tank, and the material is scattered by the material dispersing device, and the sinking and floating separation is carried out to obtain the sinking material and the floating material; the salt bleaching liquid is water and the mass ratio of industrial salt is 100:28; the sinking material is pushed to the sinking discharging hinged dragon by the sinking material advancing hinged dragon driven by the sinking material advancing motor for discharging and recycling; the floating material is pushed to the floating material by the floating material advancing hinged dragon driven by the floating material advancing motor The discharging hinge dragon carries out discharging. The invention adopts a specific salt bleaching device combined with salt bleaching liquid to separate the PET and non-PET in the handle and handle of the edible oil bottle (kettle), which can achieve a good separation effect. The method is convenient to use, has no harm, and no pollution. , The separation cost is low.

Description of the drawings

Figure 1 is a side view of the salt bleaching device of the present invention;

Figure 2 is a front view of the salt bleaching device of the present invention;

Figure 3 is a top view of the salt bleaching device of the present invention.

Detailed ways

The present invention provides a salt bleaching device and a method for removing handles and handles of waste edible oil bottles (jugs). Those skilled in the art can learn from the content of this article and appropriately improve the process parameters. In particular, it should be pointed out that all similar replacements and modifications are obvious to those skilled in the art, and they all fall within the protection scope of the present invention. The method and application of the present invention have been described through the preferred embodiments. It is obvious that relevant personnel can modify or appropriately change and combine the methods and applications herein without departing from the content, spirit and scope of the present invention to realize and apply the present invention. Invent technology.

The present invention provides a salt bleaching device, including:

Flotation separation tank;

Feeding auger for feeding materials into the flotation separation tank;

The salt bleaching device provided by the present invention includes a flotation separation tank.

The flotation separation tank of the present invention is the core component of the salt bleaching device, and is a place for salt bleaching and separation.

The material of the flotation separation cell of the present invention is preferably stainless steel, and the length of the separation cell is 470 cm to 490; the width is 120 to 140 cm; and the height is 150 to 170 cm.

The two sides of the top of the flotation separation tank of the present invention are respectively provided with a material inlet and a float outlet, and the bottom is provided with a sinking outlet.

The salt bleaching device provided by the invention includes a material feeding auger for feeding the material into the flotation separation tank.

The present invention does not limit the feed-in material hinged dragon, as long as the material is separated to the flotation separation tank conveyor belt; the feed-in material hinged dragon is at the bottom and the discharge end is at the top. Wherein, the discharge end of the feed auger is connected with the material inlet of the flotation separation tank, and the discharge end is obliquely pressed on the top edge of the flotation separation tank.

The salt bleaching device provided by the present invention includes a material dispersing device for dispersing the materials sent into the flotation separation tank and a dispersing motor for driving the device.

The present invention does not limit the dispersing motor that drives the device, as long as it is well known to those skilled in the art. The power of the material dispersing motor of the present invention is preferably 1.5kw.

The material dispersing device of the present invention disperses the materials entering the salt bleaching device, which can improve the ups and downs effect.

The salt bleaching device provided by the present invention includes a floating material propelling hinge used to push the floating material in the flotation separation tank to the floating material discharging hinge and a floating material propelling motor used to drive the floating material propelling hinge.

The floating material propelling hinges of the present invention are arranged side by side on the upper part of the flotation separation tank; the floating material propelling hinges are preferably in three rows; the rotation direction of the spiral blades of the floating material propelling hinges in the middle row and the direction on both sides in contrast. That is, the materials in the flotation tank reciprocate in the flotation separation tank through the floating material propelling hinged dragon, and finally from the floating material outlet to the floating material discharging hinged dragon.

The spiral direction of the blades on the hinged dragon of the present invention is determined by the direction of material travel, the pipe axis is flat, and the tolerance perpendicular to the axis is not more than 1mm, the blades are welded firmly, and the welds are uniform, and the left and right shaft heads are modulated and processed HB230-250, left and right The shaft head is processed after welding.

The floating material propelling hinged dragon can transfer the material that enters the sink and float separation tank with a density less than that of the salt floating on the surface. At the same time, the teeth of the hinged dragon can be further agitated to further help the sinking and floating separation.

The floating material propelling motor used for driving the floating material propelling hinged dragon of the present invention is arranged on the side wall of the flotation separation tank. The power of the floating material propulsion motor of the present invention is preferably 2.2kw.

The salt bleaching device provided by the present invention includes a floating material discharging hinge used to send the floating material out of the device and a floating material discharging motor used to drive the floating material discharging hinge.

The floating material discharging hinge of the present invention is connected with the floating material outlet of the flotation separation tank, and is arranged obliquely on the side wall of the flotation separation tank.

The power of the floating material discharging motor of the present invention is preferably 2.2kw.

The floating material discharging hinged dragon of the present invention sends the floating material separated by salt bleaching out of the machine to go to the next process, which is a non-PET component.

The salt bleaching device provided by the present invention includes a sinker advancing hinge used to push the sinking material in the flotation separation tank to the sinking material discharging hinge and a sinking material advancing motor used to drive the sinking advancing hinge.

The sinking material propelling motor and the floating material propelling motor of the present invention are arranged on opposite sides. They are respectively arranged on both sides of the flotation separation tank, and the height does not need to be the same, it can be according to actual needs.

The sinking material propelling hinged dragon of the present invention is preferably one row; it is arranged at the bottom of the flotation separation tank. The sinker advancing hinge dragon pushes the sinker to the sinker outlet.

The sinking material propelling hinge of the present invention sinks the materials that enter the sink and float separation tank, and the materials with a density greater than the salt float density into the bottom of the machine for material transportation, and at the same time, the teeth of the hinge screw can be further agitated to further help the sink and float separation.

The power of the sinker propulsion motor of the present invention is preferably 2.2kw.

The salt bleaching device provided by the present invention includes a sinking material discharging hinge used to send the sinking material out of the device and a sinking material discharging motor used to drive the sinking material discharging hinge.

The sinker discharge hinge of the present invention is connected with the sinker outlet. The power of the sinking material discharging motor of the present invention is preferably 1.5kw.

The sinking and discharging hinge of the present invention can preferably be arranged obliquely from bottom to top, and the feeding end is set at the sinking outlet at the bottom of the flotation separation tank.

The sinking material discharging hinge of the invention sends the sinking material after salt bleaching and separation out of the machine to go to the next process, which is a PET component and can be recycled.

The inventor creatively provides a new salt bleaching device for the existing manual removal of oil can handles and handles, which can be used for the separation of oil cans and the recycling of PET. The ups and downs of PET and non-PET can be separated, which can achieve good results. This method is convenient to use, has no harm, no pollution, and low separation cost.

The salt bleaching device in some of the preferred embodiments of the present invention is shown in Figures 1 to 3, wherein Figure 1 is a side view, Figure 2 is a front view, and Figure 3 is a top view.

Among them, 1 is the material feeding hinge dragon and motor, 2 is the material dispersing motor and dispersing device, 3 is the sinking propulsion motor, 4 is the floating material propelling and dispersing motor, and 5 is the floating material discharging hinge and floating device. Material discharging motor, 6 is sinking discharging hinged dragon and sinking motor, 7 flotation separation tank, 8 floating material advancing hinged dragon, 9 sinking material advancing hinged dragon.

The invention provides a method for removing the handle and handle of a waste edible oil bottle (kettle) by a salt bleaching device. First, the handle and handle of the edible oil bottle (kettle) are crushed.

The existing cleaning oiler bottles are separated from other polyester bottles in different materials. Ordinary polyester bottles are mainly separated from PET and bottle cap PE and a small amount of label paper PVC. And the oil can bottle, there are PE, PVC, ABS, PP, PS, etc. to be separated. The density of each material that needs to be separated is different.

The present invention first also includes pretreatment of the purchased oil bottle, and the pretreatment is preferably: unpacking, cleaning of the entire bottle, manual sorting, crushing, and cleaning into the hot pot.

The present invention does not limit the unpacking, cleaning of the whole bottle, manual sorting, crushing, and cleaning into the hot pot, as long as those skilled in the art are well-known, the cleaning time of the whole bottle is preferably 8-10 minutes; The whole bottle cleaning temperature is preferably 85-95°C; more preferably 88-92°C; the hot washing time of the broken bottle flakes is preferably 20-25 min; the hot washing temperature of the broken bottle flakes is preferably 25-35°C; Hot-washing temperature of sheet hot pot: 88～90℃ (the temperature in the middle of hot-washing pot). The liquid level of the cleaning liquid of the whole bottle cleaning machine of the present invention: 1/6; the filling level of the cleaning liquid of the hot washing machine: 3/5.

The mesh size of the crushing is preferably 12-14 mm.

After the pretreatment is completed, after crushing, it is mixed with the salt bleaching liquid and placed in the flotation separation tank.

According to the present invention, the mass ratio of the salt bleaching liquid to water and industrial salt is 100:28; the density of the salt bleaching liquid is 1.15-1.16.

The concentration of salt bleaching solution is formulated within the standard range (1.15-1.16) to keep the content of active ingredients stable, effectively improving and stabilizing the quality of regenerated bottle flakes. The PVC content of recycled bottle flakes is below 50PPM, a drop of about 100PPM, the label paper content is about 20PPM, a drop of 100PPM, and the PE content is about 30, a drop of 100PPM.

In the experiment of the present invention, industrial salt is used to adjust the density. Add water to the appropriate amount of industrial salt, and the density of the configured separation liquid can achieve the separation effect. It is easy to use, non-hazardous, low in price, 500 yuan per ton, and the cost of finished materials is reduced. Meet the separation liquid density requirement of PET and non-PET separation effect.

In the flotation separation tank, the material is scattered by the material dispersing device, and the ups and downs are separated to obtain the sinking material and the floating material.

The power of the material dispersing motor of the present invention is 1.5kw. Break up the materials entering the sink-floating machine to improve the sink-floating effect.

According to the present invention, the power of the sinker propulsion motor is 2.2kw; the power of the sinker discharge motor is 1.5kw.

The sink-float separation temperature is preferably 25-35°C.

The materials entering the sink-floating separator, the materials with the density of the material greater than the density of the liquid sink into the bottom of the flotation tank, and are driven by the screw auger driven by the motor to transport the sinking material forward; the sinking material is discharged by the screw auger, and the sinking and floating are separated. The sinking material is sent out of the machine, which is the PET component.

The power of the floating material propulsion motor of the present invention is 2.2kw; the power of the floating material discharging motor is 2.2kw.

The material that enters the sink-floating separator of the present invention, the material whose material density is less than the liquid density floats on the surface of the liquid, and is driven by the auger driven by the motor, so that the floating material is conveyed in the direction of the outlet; the floating material is discharged by the auger, and the floating material is separated after the sinking and floating The floating material is sent out of the machine to the next process.

That is: in the present invention, the crushed edible oil bottle (pot) together with its handle, handle and other materials are introduced into the salt bleaching tank (sinking and floating separation tank), and the salt bleaching liquid is evenly dispersed and pushed forward. The hand and handle materials float out, and the polyester material higher than this density is led out through the sinking discharge screw into the right process for cleaning and processing, and recycled polyester bottle flakes are obtained. Effectively separate the handles and handles of polyester materials (bottle flakes) and other non-polyester materials in the pulverized mixture. The quality of recycled polyester flakes is significantly improved, and the non-PET content is reduced from more than 200ppm to less than 100ppm. Improve labor productivity. Each ton of used edible oil bottles (pots) can save 15 yuan in labor costs.

The present invention provides a method for removing the handle and handle of a waste edible oil bottle (kettle) by using the salt bleaching device according to any one of the above technical solutions. The method includes: crushing the handle and handle of the edible oil bottle (kettle) with salt. The bleaching liquid is mixed and placed in the flotation separation tank, and is dispersed by the material dispersing device, and the sinking and floating separation is carried out to obtain the sinking material and the floating material; the salt bleaching solution is water and industrial salt in a mass ratio of 100:28; The sinking material advancing hinged dragon driven by the sinking material advancing motor is pushed to the sinking material discharging hinge for discharging for recycling; the floating material is pushed to the floating material discharging hinged dragon for discharging by the floating material advancing hinge driven by the floating material advancing motor . The invention uses a specific salt bleaching device combined with salt bleaching liquid to separate the PET and non-PET in the handle and handle of the edible oil bottle (kettle), which can achieve a good separation effect. The method is convenient to use, non-hazardous, and pollution-free. , The separation cost is low.

In order to further illustrate the present invention, a salt bleaching device and a method for removing the handle and handle of a waste edible oil bottle (kettle) provided by the present invention will be described in detail below with reference to embodiments.

Example 1

According to the connection device of the present invention:

Flotation separation tank; both sides of the top of the flotation separation tank are respectively provided with a material inlet and a float outlet, and the bottom is provided with a sinking outlet. A feed auger for feeding materials into the flotation separation tank; the discharge end of the feed auger is connected with the material inlet of the flotation separation tank, and is inclined and pressed on the top edge of the flotation separation tank; A material dispersing device for dispersing materials sent into the flotation separation tank and a dispersing motor driving the device; a floating material advancing hinge used to push the floating material in the flotation separation tank to the floating material discharging hinge And a floating material propulsion motor for driving the floating material propelling hinged dragon; the floating material propelling hinged dragon is arranged side by side on the upper part of the flotation separation tank; the floating material propelling hinged dragon has 3 rows; the floating material is discharged in the middle The direction of rotation of the spiral blades of the propelling dragon is opposite to the direction on both sides. The floating material propulsion motor is arranged on the side wall of the flotation separation tank; the floating material discharging hinge is connected with the floating material outlet of the flotation separation tank, and is arranged obliquely on the side wall of the flotation separation tank; The floating material discharging hinge of the floating material discharging device and the floating material discharging motor used to drive the floating material discharging hinge; it is used to advance the sinking material in the flotation separation tank to the sinking material discharging hinge of the sinking material discharging hinge. A sinking dragon and a sinking propulsion motor for driving the sinking propulsion hinged dragon; the sinking propulsion motor and the floating material propelling motor are arranged on opposite sides; the sinking propelling hinged dragon is in a row; The propelling hinged dragon pushes the sinking material to the sinking material outlet; the sinking material discharging hinged dragon is connected with the sinking material outlet. A sinking material discharging hinge used to send the sinking material out of the device and a sinking material discharging motor used to drive the sinking material discharging hinge.

Example 2

Unpack the purchased oiler bottle, clean the whole bottle, manual sorting, crushing, cleaning into the hot pot, and brine rinsing after cleaning for deep separation

Every 100 kg of water contains 28 kg of salt, and it is formulated into a salt bleaching liquid with a density (1.15-1.16)

That is, when cleaning the bottle flakes, the concentration of the salt bleaching solution is: water: salt: = 100:28

1) Residence time

Washing time of the whole bottle: 8～10min

Hot washing time for broken bottle flakes: 25min

2) Cleaning temperature

Whole bottle cleaning temperature: 90℃±2℃

Crusher temperature: room temperature

Hot washing temperature for broken bottle flakes: 88～90℃ (the temperature in the middle of the hot washing pot).

3) Liquid level

Washing liquid level of the whole bottle washing machine: 1/6

The filling level of the cleaning fluid of the hot washer: 3/5.

The feeding frequency is 18Hz, and the discharging frequency of each pot is separately controlled to 16HZ to obtain the soaking and cleaning effect of the bottle flakes. The added agent is recycled to dehydrate and rinse the bottle flakes, and the density is separated, dehydrated, rinsed, scrubbed, and dehydrated. , The finished bottle flakes.

4) Salt bleaching:

Mixing the handle and handle of the edible oil bottle (jug) treated above with the salt bleaching liquid in the flotation separation tank, and disperse the material through the material dispersing device, and carry out sinking and floating separation to obtain sinking material and floating material; The mass ratio of salt bleaching liquid to water and industrial salt is 100:28; the density of salt bleaching liquid is 1.15～1.16; the sinking material is pushed to the sinking material discharging hinged dragon by the sinking material propulsion hinge dragon driven by the sinking material propulsion motor for discharging. Recycling; the floating material is pushed to the floating material discharging hinged dragon for discharging by the floating material advancing hinge driven by the floating material advancing motor. The power of the material dispersing motor is 1.5kw, the power of the sinking propulsion motor is 2.2kw; the power of the floating material propulsion motor is 2.2kw; the power of the floating material discharging motor is 2.2kw; the sinking material is discharged The power of the feed motor is 1.5kw. Salt water rinsing time of broken bottles and flakes: 30min; salt water rinsing and separation tank temperature of broken bottles: normal temperature; liquid level of flotation separation tank: to overflow (water recycling).

5) Test results: The content of non-PET is less than 100ppm, the cap material and the bottle flakes are fully separated; the PVC content of the recycled bottle flakes is below 50PPM, a drop of about 100PPM, the label paper content is about 20PPM, a drop of 100PPM, and the PE content is about 30. Drop 100PPM.

Comparative example 1

Unpacking, material sorting, whole bottle cleaning, manual sorting, crushing, cleaning into the hot pot, and brine rinsing after cleaning for deep separation

Every 100 kg of water contains 20 kg of salt, and it is formulated into a salt bleaching liquid with a density (1.12-1.14)

That is, when cleaning the bottle flakes, the concentration of the salt bleaching solution is: water: salt: = 100:20

1) Residence time

Washing time of the whole bottle: 8～10min

Hot washing time for broken bottle flakes: 25min

Salt water rinsing time of broken bottle flakes: 30min

2) Cleaning temperature

Whole bottle cleaning temperature: 90℃±2℃

Crusher temperature: room temperature

3) Liquid level

Washing liquid level of the whole bottle washing machine: 1/6

The filling level of the cleaning fluid of the hot washer: 3/5.

The feeding frequency is 18Hz, and the discharging frequency of each pot is separately controlled to 16HZ to obtain the soaking and cleaning effect of the bottle flakes. The added agent is recycled to dehydrate and rinse the bottle flakes, and the density is separated, dehydrated, rinsed, scrubbed, and dehydrated. , Finished bottle flakes

4) Salt bleaching:

The handle and handle of the edible oil bottle (jug) treated above are mixed with the salt bleaching liquid and mixed and placed in the flotation separation tank, and dispersed by the material dispersing device, and the sinking and floating are separated to obtain the sinking material and the floating material; The density of the salt bleaching liquid is 1.12-1.14; the sinking material is pushed to the sinking material discharging hinged dragon by the sinking material advancing hinge driven by the sinking material advancing motor for discharging and recycling; the floating material is propelled by the floating material driven by the floating material advancing motor The hinge dragon pushes to the floating material discharging hinge dragon for discharging. The power of the material dispersing motor is 1.5kw, the power of the sinking propulsion motor is 2.2kw; the power of the floating material propulsion motor is 2.2kw; the power of the floating material discharging motor is 2.2kw; the sinking material is discharged The power of the feed motor is 1.5kw. Salt water rinsing time of broken bottles and flakes: 30min; salt water rinsing and separation tank temperature of broken bottles: normal temperature; liquid level of flotation separation tank: to overflow (water recycling).

4) Test result: The non-PET content reaches above 100ppm and below 300ppm, and a small amount of bottle cap material sinks into the bottle flake material. The PVC content of recycled bottle flakes is more than 50PPM, the label paper content is more than 20PPM, and the PE content is more than 30ppm.

Comparative example 2

Every 100 kg of water contains 35 kg of salt, which is formulated into a salt bleaching liquid with a density (1.17-1.18)

That is, when cleaning the bottle flakes, the concentration of the salt bleaching liquid is: water: salt: = 100:35

1) Residence time

Washing time of the whole bottle: 8～10min

Hot washing time for broken bottle flakes: 25min

2) Cleaning temperature

Whole bottle cleaning temperature: 90℃±2℃

Crusher temperature: room temperature

3) Liquid level

Washing liquid level of the whole bottle washing machine: 1/6

The filling level of the cleaning fluid of the hot washer: 3/5.

The feeding frequency is 18Hz, and the discharging frequency of each pot is separately controlled to 16HZ to obtain the soaking and cleaning effect of the bottle flakes. The added agent is recycled to dehydrate and rinse the bottle flakes, and the density is separated, dehydrated, rinsed, scrubbed, and dehydrated. , The finished bottle flakes;

4) Salt bleaching:

The handle and handle of the edible oil bottle (jug) treated above are mixed with the salt bleaching liquid and mixed and placed in the flotation separation tank, and dispersed by the material dispersing device, and the sinking and floating are separated to obtain the sinking material and the floating material; The density of the salt bleaching liquid is 1.17-1.18; the sinking material is pushed to the sinking material discharging hinged dragon by the sinking material advancing hinged dragon driven by the sinking material advancing motor for discharging and recycling; the floating material is propelled by the floating material driven by the floating material advancing motor The hinge dragon pushes to the floating material discharging hinge dragon for discharging. The power of the material dispersing motor is 1.5kw, the power of the sinking propulsion motor is 2.2kw; the power of the floating material propulsion motor is 2.2kw; the power of the floating material discharging motor is 2.2kw; the sinking material is discharged The power of the feed motor is 1.5kw. Salt water rinsing time of broken bottles and flakes: 30min; salt water rinsing and separation tank temperature of broken bottles: normal temperature; liquid level of flotation separation tank: to overflow (water recycling).

5) Test result: The non-PET content is below 110ppm, but a small amount of flakes do not sink, and they enter the cap discharge screw together with the cap. That is: the bottle flakes cannot sink to the bottom of the salt bleaching liquid, causing difficulty in discharging at the bottom. A small number of flakes do not sink and enter the cap discharge screw together with the bottle cap, resulting in bottle flakes in the bottle cap material.

Comparative example 3～5

Water as flotation fluid: adjust the density by adjusting the temperature of the water. The density of water changes with temperature. Lowering the temperature can increase the density to increase the buoyancy for separation. However, through experiments, the temperature of the water changes, and the density changes little, especially for some non-PET materials, the density is 1.05, and the density is only 0.999 when the water temperature is zero. In the production process, the normal temperature of the water exceeds zero degrees. As a result, the above-mentioned flotation separation of PET and non-PET cannot be achieved.

Sodium hydroxide is used as the flotation liquid: Sodium hydroxide is used to adjust the density. Through experiments, the density formulated with sodium hydroxide can achieve the effect of specific gravity separation. But the disadvantages: Sodium hydroxide is highly corrosive to equipment, unsafe for personnel to operate, and costly (7,000 yuan per ton), and it will increase the alkalinity of cleaning wastewater and increase the cost of sewage treatment.

Using potassium carbonate as the flotation fluid: Potassium carbonate is highly hygroscopic, and can absorb carbon dioxide and moisture when exposed to the air, making it difficult to store and use. The cost is also high, the price is 6,500 yuan per ton.

The above are only the preferred embodiments of the present invention. It should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and modifications can be made, and these improvements and modifications are also It should be regarded as the protection scope of the present invention.

Claims

A salt bleaching device is characterized in that it comprises:

Flotation separation tank;

Feeding auger for feeding materials into the flotation separation tank;

A material dispersing device used to disperse the materials sent into the flotation separation tank and a dispersing motor driving the device;

Floating material advancing hinge used to push the floating material in the flotation separation tank to the floating material discharging hinge, and a floating material advancing motor used to drive the floating material advancing hinge;

Floating material discharging hinge used to send the floating material out of the device and the floating material discharging motor used to drive the floating material discharging hinge;

The sinker advancing hinge used to push the sinking material in the flotation separation tank to the sinker discharging hinge, and the sinker advancing motor used to drive the sinker advancing hinge;

A sinking material discharging hinge used to send the sinking material out of the device and a sinking material discharging motor used to drive the sinking material discharging hinge.
The device according to claim 1, characterized in that the discharge end of the feed auger is connected with the material inlet of the flotation separation tank, and is obliquely pressed on the top edge of the flotation separation tank.
The device according to claim 1, wherein the floating material propelling hinged dragons are arranged side by side on the upper part of the flotation separation tank; the floating material propelling hinged dragons are in three rows; the floating material propelling hinged dragons of the middle row are arranged side by side. The direction of rotation of the spiral blade is opposite to the direction on both sides.
The device according to claim 1, wherein the floating material propulsion motor is arranged on the side wall of the flotation separation tank; the floating material discharging hinge is connected with the floating material outlet of the flotation separation tank, and is arranged obliquely On the side wall of the flotation separation tank.
The device according to claim 1, wherein the two sides of the top of the flotation separation tank are respectively provided with a material inlet and a floating material outlet, and the bottom is provided with a sinking material outlet.
The device according to claim 1, wherein the sinking material propulsion motor and the floating material advancing motor are arranged on opposite sides; the sinking material advancing hinged dragon is in a row; the sinking material advancing hinged dragon will sink the material Push to the sinker outlet; the sinker discharge hinge is connected with the sinker outlet.
A method for removing handles and handles of waste edible oil bottles (jugs) by using the salt bleaching device according to any one of claims 1 to 6, characterized in that it comprises:

The handle and handle of the edible oil bottle (pot) are crushed and the salt bleaching liquid is mixed and placed in the flotation separation tank, and the material is dispersed by the material dispersing device, and the sinking and floating separation is carried out to obtain the sinking material and the floating material; the salt bleaching liquid is The mass ratio of water and industrial salt is 100:28;

The sinking material is pushed to the sinking material discharging hinge through the sinking material advancing hinge driven by the sinking material advancing motor for discharging and recycling;

The floating material is pushed to the floating material discharging hinged dragon for discharging by the floating material advancing hinge driven by the floating material advancing motor.
The method according to claim 7, wherein the power of the material feeding motor is 2.2kw; the power of the material dispersing motor is 1.5kw, and the power of the sinking propulsion motor is 2.2kw; the floating material propulsion motor The power of the floating material discharge motor is 2.2kw; the power of the floating material discharge motor is 2.2kw; the power of the sinking material discharge motor is 1.5kw.
The method according to claim 7, wherein the sink-float separation temperature is 25-35°C.
The method according to claim 7, wherein the density of the salt bleaching liquid is 1.15-1.16.