JP4127387B2 - RPF calorific value estimation method and apparatus - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
TECHNICAL FIELD The present invention relates to a method and apparatus for managing the calorific value of RPF produced by crushing, mixing and molding waste paper and waste plastic, and in particular, RPF exotherm during production by removing vinyl chloride contained in waste plastic. The present invention relates to a quantity estimation method and apparatus.
[0002]
[Prior art]
RPF (refuse paper and plastic fuel) is a recycled fuel produced by crushing, mixing, and molding waste paper and waste plastic, and has features such as high calorie, adjustable calorific value, and good handling properties. Used in boilers as an alternative to oil. For existing boilers, etc., it is necessary to use an RPF that has a calorific value that meets the design specifications of each facility. In the RPF manufacturing plant, several types of RPF with different calorific values are manufactured by adjusting the content ratio of waste paper and waste plastic. ing.
[0003]
The calorific value of the product RPF can be obtained by a combustion experiment. For example, Patent Document 1 describes a process of producing a solid fuel from general waste, but here, a fuel quality determination device is provided and a combustion test is periodically performed to measure the calorific value of the fuel.
However, the amount of heat generated by the product RPF is determined by the ratio of waste plastic and waste paper contained in the RPF, so the speed of the waste plastic supply conveyor supplied as the raw material, the speed of the waste paper supply conveyor, and the average heat generation of the waste plastic and waste paper It can be estimated from the quantity.
[0004]
In addition, when a chlorine compound is contained in RPF, dioxin is generated upon combustion. Therefore, it is preferable to manufacture after removing vinyl chloride plastic contained in the waste plastic used as a raw material.
In order to remove the vinyl chloride plastics before the supply to the RPF manufacturing process, a device that detects and removes vinyl chloride from the amorphous waste plastic group is necessary, which also increases the equipment cost. I can not escape.
For this reason, the waste plastic is put into a crusher and made into a piece of an appropriate size, and then the conveyor that conveys it is equipped with a material sorter that discriminates and sorts the plastic, eliminating vinyl chloride plastic on the way. It is preferable to do so.
[0005]
Thus, when the vinyl chloride plastic is removed during the manufacturing process, the initial calorific value is different from the actual value. Therefore, the amount of removed vinyl chloride plastic is measured to determine the RPF. It is necessary to correct the calorific value.
However, if a new device for measuring the amount of vinyl chloride plastic removed is introduced, the equipment costs will rise.
[0006]
Patent Document 2 discloses a method for producing a solid fuel by treating waste paper and waste plastic, and removing chlorine-containing substances by heat-treating the waste plastic as a raw material at 250 ° C to 350 ° C. It is described to do. However, the method of heat-treating the raw material is problematic because it consumes extra energy. Patent Document 2 also describes that the calorific value is actually measured with a calorimeter in order to manage quality.
[0007]
[Patent Document 1]
Japanese Patent Laid-Open No. 7-242887 [Patent Document 2]
Japanese Patent Laid-Open No. 2001-220590
[Problems to be solved by the invention]
Therefore, the problem to be solved by the present invention is that vinyl chloride is eliminated without providing a new measuring device in the process of producing RPF (refuse paper and plastic fuel) by crushing and mixing waste paper and waste plastic. To provide an RPF heat generation amount estimation method and apparatus for estimating the amount of plastic and correcting the heat generation amount of a product RPF.
[0009]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, the method for estimating the calorific value of the product RPF according to the present invention is an RPF manufacturing facility in which a material sorter for sorting based on the type of plastic is provided after the crusher. Calculate the supply amount of both materials using the speed of the supply conveyor, determine the amount of vinyl chloride removed by the material sorter based on the measurement signal or operation signal of the material sorter, and subtract the removed vinyl chloride The amount of heat generated from the product RPF is estimated from the amount of waste plastic and the amount of waste paper.
[0010]
In addition, the average calorific value of waste paper and waste plastic, the average calorific value of vinyl chloride, and iron, aluminum other than plastic, or objects that are removed by hand sorting, etc., are necessary to determine the calorific value of the product RPF. It is desirable that the amount and the like can be set in advance as calculation parameters. The value may be easily changed on a GUI screen of a computer.
[0011]
According to the method of the present invention, since the vinyl chloride sorting and removing means already installed in the apparatus is used to detect the required vinyl chloride and evaluate the removal amount, it is newly expensive. The calorific value of the product RPF can be estimated very economically without installing a detection means for vinyl chlorides.
Conventional supply amounts of waste plastic and waste paper are managed, and the amount of heat generated when the total amount becomes RPF is grasped. Therefore, it is preferable to remove the chloride from the plastic raw material by providing a material sorter that detects and removes the chloride in the waste plastic of the raw material in the process in the middle of production so that no harmful substances such as dioxin are generated. .
[0012]
Such a material sorter determines a material by measuring a specific characteristic of waste plastic passing on a conveyor and outputs a judgment signal output. Eliminate from the flow. A conveyor that conveys the waste plastic may be guided to the waist tank, moved from the conveyor to the supply line when not chloride, and dropped into the waist tank as it is chloride.
In the material sorter, the material judgment unit and the actuator drive unit have different functions, so they are configured separately.The measurement output representing the judgment result is transmitted to the drive unit as an electrical signal, and the operation signal is transmitted to the actuator for driving. ing. Therefore, the amount of passage of chloride such as vinyl chloride passing through the conveyor or the amount of removal eliminated by the actuator can be estimated by taking in the measurement output or the operation signal and calculating.
[0013]
In particular, a material sorter detector that determines the type of plastic is provided above the conveyor, and when the detected chloride reaches the end of the conveyor, air is supplied to the air nozzle at the position corresponding to the detection position. When using a material sorter that blows away the chloride falling from the conveyor to the downstream conveyor and moves it away from the supply line, the amount of vinyl chloride excluded can be reduced by estimating the amount of plastic blown off by the air nozzle. Will be estimated.
[0014]
In the case of a simple structure, the type of plastic piece conveyed on the conveyor is determined at an appropriate time interval, and when the determined part reaches the end of the conveyor, the air nozzle is blown away toward the waist tank. It is like that. The air blowing duration is the time interval at the time of determination or the time obtained by subtracting the transition time at the time of air switching from the time interval.
Then, the amount of chloride blown is a value obtained by multiplying the number of activated air nozzles by the conveyor speed, the measurement time interval, and the thickness of the waste plastic on the conveyor. Therefore, the removal amount of vinyl chloride or the like can be represented by the number of air nozzles operated or the operation ratio and the conveyor speed under a predetermined condition.
By subtracting the estimated amount of chloride from the initial amount of waste plastic supplied, it is possible to estimate the amount of waste plastic present in the product RPF and to estimate the amount of heat generation. Or the calorific value of RPF can be estimated if the ratio of the excluded chloride to the waste plastic is known.
[0015]
In addition, if the sensor which judges the kind of waste plastics is a method of judging the material from the wavelength absorption characteristic using the fact that the reflectance varies by irradiating near infrared rays, and the absorbance varies depending on the substance. Highly accurate determination can be made. In addition, since it is possible to determine the types of various plastics as well as vinyl chloride, the amount of heat generated from the product RPF can be estimated more accurately by calculating the amount of heat generated for each type in consideration. .
A plastic sorter incorporating such a sensor and an air nozzle is commercially available, for example, under the trade name “Multi Sorter” by the applicant of the present application.
[0016]
In addition, the target heating value of the product RPF is input, and the amount of waste plastic from which chloride has been removed and the amount of waste paper supplied are adjusted by the conveyor speed to control the heating value of the product RPF so as to approach the target value. It is preferable to provide a function.
Compared with the target calorific value because it is possible to accurately estimate the calorific value of the waste plastic contained in the product RPF by accurately grasping the amount of vinyl chloride etc. excluded by the RPF calorific value estimation method of the present invention online. The calorific value can be automatically adjusted by calculating the amount of used paper supplied corresponding to the excess / deficiency calorific value obtained and adjusting the conveyor speed.
Since the calorific value can be automatically adjusted in this way, an RPF having a calorific value that changes in accordance with the specifications of a boiler or the like can be easily manufactured and supplied to the customer.
[0017]
Furthermore, in order to solve the above problems, the calorific value estimation device for product RPF according to the present invention is an RPF manufacturing process including a waste paper supply conveyor and a waste plastic supply conveyor, and a material sorter is provided on the waste plastic conveyor. It is used in the RPF manufacturing process that is installed to manufacture RPF by removing vinyl chloride, and inputs the result of measuring the amount of plastic for each type from the material sorter, used paper supply conveyor and waste plastic The conveyor speed is input from the control device for the supply conveyor, and the heat generation amount of the product RPF is calculated from the plastic amount and the conveyor speed for each type.
If the material and the amount of waste plastic mixed in the RPF can be determined, the heat generation amount of the product RPF can be estimated by giving the respective heat generation amounts.
[0018]
In addition, the product RPF calorific value estimation apparatus of the present invention inputs the target value of the calorific value of the product RPF, adjusts the conveyor speed by the waste paper supply conveyor and waste plastic supply conveyor control device, and the actual product. A controller for controlling the RPF heat generation amount so as to approach the target value may be provided.
By using the RPF calorific value estimation device of the present invention, it is possible to accurately calculate the RPF calorific value in consideration of the amount of waste plastic contained in the RPF and the amount of vinyl chloride to be removed without greatly changing existing equipment. Can be estimated. In addition, by forming a control loop using this RPF heat generation amount estimation device, a homogeneous RPF having a required heat generation amount can be manufactured.
[0019]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the present invention will be described in detail based on examples with reference to the drawings.
FIG. 1 is a block diagram of an RPF manufacturing plant to which the RPF heat generation amount estimation apparatus of the present embodiment is applied. 2 is a perspective view for explaining an actuator of a material sorter used in the present embodiment, FIG. 3 is a diagram for explaining a drive mechanism of the actuator, FIG. 4 is a drawing for explaining a calculation principle for estimating a vinyl chloride plastic amount, FIG. 5 is a block diagram of the RPF heat generation amount estimation apparatus of the present embodiment, and FIG. 6 is a block diagram of an apparatus to which an automatic adjustment function of the RPF heat generation amount is added in the present embodiment.
[0020]
The RPF manufacturing plant to which the RPF calorific value estimation apparatus of the present embodiment is applied is a plant that pulverizes and mixes waste plastic and waste paper to form RPF (refuse paper and plastic fuel). Waste plastic and waste paper use industrial waste or sorted waste with a clear history of generation as raw materials, simplifying the manufacturing process by omitting the drying process, which is essential when processing household waste, etc. Therefore, there is an advantage that a high-calorie RPF with low energy consumption and stable quality can be obtained.
Furthermore, by adjusting the ratio of the waste paper in the raw material, the calories of RPF can be adjusted according to the specifications of the boiler and the like.
[0021]
As shown in FIG. 1, waste plastic as one raw material is supplied to a waste plastic supply conveyor 1, transported to a crusher 2, becomes a predetermined size plastic piece, and is dropped onto a transport conveyor 3.
The amount Wpl of thrown-in waste plastics is obtained by multiplying the waste plastic supply conveyors amount conversion coefficient Kpl the speed Vpl waste plastic feed conveyor 1.
Wpl = Kpl × Vpl
A rim 4 is provided on the side of the conveyor 3 so that waste plastic pieces to be conveyed do not fall out. The waste plastic pieces are dropped onto the conveyor 3 so as to be almost equal in depth over the width, and are conveyed.
On the conveyor 3, there is provided a material sorter detector 5 that receives near-infrared rays, receives reflected light, analyzes the reflectance, and determines the material of the reflecting object, and detects at least vinyl chloride plastic. To output a determination signal.
[0022]
A chute 6 as shown in FIG. 2 is provided at the end of the conveyor 3 and a large number of air blowing holes 7 such as 64 are provided near the upper end of the chute so as to cross the chute. As shown in FIG. 3, an air nozzle 8 is disposed in the air blowing hole 7, and an electromagnetic valve 10 that controls supply of compressed air from the air header 9 is provided.
The detector 5 divides the width of the transport conveyor 3 into the number of air nozzles 8 and determines the material of the waste plastic transported for each divided section. When the determination result is a vinyl chloride plastic, when the vinyl chloride plastic reaches the air blowing hole 7 of the chute 6, the solenoid valve 10 of the air nozzle 8 located at the corresponding position is operated to operate the air blowing hole 7. Blow up air. Then, the waste plastic on the chute 6 is blown off beyond the partition plate 11 and sent into the vinyl chloride recovery box 12.
[0023]
When the waste plastic that can be mixed into the RPF reaches the position of the air blowing hole 7, the air nozzle 8 does not work and passes therethrough and falls onto the sorting line conveyor 13.
The material determination using near infrared absorption characteristics is based on the chemical characteristics of plastics, and can be detected by distinguishing not only vinyl chloride but also various plastics. Therefore, by determining the type of plastic for each detection unit of the sensor, the content ratio is estimated for each type of plastic, and the calorific value of the entire waste plastic mixed with various plastics is estimated using the average calorific value for each material. You can also
[0024]
The sorting line conveyor 13 removes inconvenient objects when mixed with RPF such as iron and aluminum other than waste plastic through a magnetic sorting machine, a wind sorting machine, or manual sorting by an operator on the way. .
Waste plastic from which vinyl chloride plastic or iron has been removed is fed into the mixing hopper 14.
[0025]
On the other hand, the used paper is supplied to the used paper crusher 16 by the used paper supply conveyor 15 and is supplied to the mixing hopper 14 in the same manner as the waste plastic by the used paper transport conveyor 17 in the form of small pieces.
The amount Wpp of thrown-in waste paper is determined by multiplying the paper feed conveyors weight conversion factor Kpp the speed Vpp of paper feed conveyor 15.
Wpp = Kpp × Vpp
Waste plastic and waste paper are evenly mixed in the mixing hopper 14, sent to a molding machine 18, compression-molded and deposited in a storage place 19 as pellets of a predetermined size, and shipped as necessary.
[0026]
FIG. 4 is a diagram for explaining the relationship between the determination output of the detector 5 and the operation output for operating the air nozzle 8. It is assumed that a vinyl chloride plastic region 21 having a certain size exists on the conveyor 3 at the conveyance speed V. The detector 5 measures every time interval Ts to determine whether vinyl chloride is present at the same interval dp as the interval of the air nozzle 8. When it is determined that there is vinyl chloride, an operation signal is generated to activate the air nozzle 8 at a position corresponding to the determination position when the portion reaches the position of the air nozzle 8. The air nozzle 8 is continuously operated during the determination time interval Ts, as hatched in the figure.
[0027]
Then, the waste plastic blown off by the air nozzle 8 substantially coincides with the vinyl chloride region 21, and the area of the region 22 blown off by the hatched air in the figure corresponds to the vinyl chloride amount Wvc.
Wvc = F (Ts, V, Tv, ρ)
Here, Tv represents the number of opening operation commands for the air nozzle 8, and ρ represents the bulk specific gravity of vinyl chloride. The air nozzle interval dp is a fixed value determined by the equipment. The determination time interval Ts and the conveyor speed V can be selected depending on conditions.
[0028]
In FIG. 4, if the solenoid valve Vi that drives the i-th air nozzle 8 receives Tv [i] opening operation commands within the data processing interval Tf, the chloride removed by the i-th air nozzle within Tf time. The area A [i] on the vinyl conveyor is
A [i] = aTv [i]
It becomes. Here, a is an area of vinyl chloride estimated to be removed when the air nozzle is operated once.
a = Ts × V × dp
[0029]
Therefore, the amount Wvc of the vinyl chloride plastic removed by the material sorter at Tf time is
Wvc = ΣA [i] × d × ρ / Tf
It becomes. However, (SIGMA) means the integration | accumulation about i = 1-64, d represents the average thickness of the vinyl chloride on a conveyor.
According to the above formula, the amount of waste plastic Wvc eliminated in the vinyl chloride recovery box 12 can be known by inputting the judgment output of the detector 5 or the operation signal of the air nozzle 8.
[0030]
Further, the amount Wrpf of the produced RPF can be calculated by grasping the amount Wfe, Wal of the metal such as iron or aluminum removed by the sorting line conveyor 13 and the amount Wmn of the object removed by manual sorting. .
Wrpf = Wpp + Wpl-Wfe-Wal-Wmn-Wvc
Furthermore, if the unit calorific values Hpp, Hpl, and Hvc of waste paper, waste plastic, and vinyl chloride are evaluated and input in advance, the unit calorific value Hrpf of the RPF that is produced by the following equation can be estimated.
Hrpf = η (HppWpp + HplWpl−HvcWvc) / Wrpf
Here, η is an adjustment coefficient based on the efficiency obtained experimentally.
[0031]
Although the vinyl chloride plastic can be separated upstream of the crusher 2, the discharge mechanism such as the air nozzle 8 cannot be simplified because the shape and size of the raw material plastic vary, and the detection area and discharge The relationship of operation tends to be complicated and result in the discharge of excess components. As in the above-described process, when the waste plastic as raw material is crushed by the crusher 2 and then separated into pieces having a predetermined size, the vinyl chloride that has passed the partition plate 11 by the air nozzle 8 having a predetermined structure is used. The recovery box 12 can be reliably blown off.
[0032]
FIG. 5 is a block diagram showing an example of a device configuration that enables the above calculation.
A conventional RPF manufacturing plant is provided with a plant control device 30, which gives speed commands to the used paper supply conveyor 15 and the waste plastic supply conveyor 1 to control the respective speeds and adjust the RPF raw material distribution.
In order to remove the vinyl chloride plastic, a material sorter 31 is provided. The material sorter 31 includes a material sensor 5, a control device 32, and an air blowing valve 8, detects vinyl chloride plastic contained in waste plastic passing by the material sensor 5, and a portion of vinyl chloride is the air blowing valve 8. The air is blown at the time when it reaches the position of, and the vinyl chloride component is blown off to the vinyl chloride recovery box 12. Components other than vinyl chloride are sent to the sorting line 13 where iron, aluminum and other non-combustible components are removed and carried into the molding machine 18. In the molding machine 18, the waste plastic and the waste paper are combined and compression molded into RPF pellets.
[0033]
The plant control device 30 collects various signals generated in the RPF manufacturing plant and transmits a signal used by the heat generation amount estimation device 33 to the heat generation amount estimation device 33.
The calorific value estimation device 33 includes a communication unit 34 connected to the plant control device 30, a database 35 for storing the obtained data, a calculation unit 36 that takes in the data and operates according to a calculation formula, and a display device 37 that displays the result. .
The calorific value estimation device 33 inputs the speed command of the used paper supply conveyor 15 and the waste plastic supply conveyor 1 and the operation signal of the air blowing valve 8, and calculates the RPF production amount and RPF unit calorific value by the above formula. The result is displayed on the display device 37 on the screen.
[0034]
Parameters necessary for the calculation can be input by an operator's hand from an input device such as a keyboard or a pointing device attached to the display device 37 and appropriately reflected in the calculation.
Further, if the calorific value estimation device 33 takes in the result of determining the type of plastic from the control device 32 of the material sorter 31 and calculates it, the calorific value of the product RPF can be estimated more precisely. .
[0035]
FIG. 6 is a block diagram showing an example of the configuration of an apparatus that receives an RPF quality request and manufactures an RPF having a quality that satisfies the request.
The difference from the apparatus configuration of FIG. 5 is that the supply conveyor speed command data is not transmitted from the plant control device 30 to the calorific value estimation device 33, but an appropriate supply conveyor speed is calculated by the calculation unit 36, and the speed command value is calculated. It is to transmit to the plant control unit 30 via the communication unit 34. In FIG. 6, portions different from FIG. 5 are indicated by thick arrows.
[0036]
The calorific value estimation device 33 receives the valve operation signal from the plant control device 30, accumulates it in the database 35, reads it together with past data in the calculation unit 36, substitutes it into the calculation formula, calculates it, and generates heat of the product RPF The amount is estimated and the result is displayed on the display device 37. Further, when the operator inputs the target value of the RPF heat generation amount via the input device attached to the display device 37, the difference between the estimated RPF heat generation amount and the estimated speed of the waste plastic supply conveyor and the used paper supply conveyor is evaluated. Is calculated.
[0037]
Since the heat generation amount of waste plastic is larger than the heat generation amount of waste paper, if the RPF heat generation amount is lower than the target value, the ratio of waste paper is decreased to increase the heat generation amount. If the RPF heat generation amount is higher than the target value, the ratio of waste paper It is necessary to suppress the calorific value by increasing.
The calculation unit 36 generates speed command values for the waste plastic supply conveyor and the used paper supply conveyor, and transmits them to the plant control device 30 via the communication unit 34.
By using the calorific value estimation device shown in FIG. 6, RPF pellets that realize the appropriate calorific value required for each boiler or the like can be manufactured almost automatically.
[0038]
【The invention's effect】
As described above, the RPF production plant according to the present invention estimates the amount of vinyl chloride plastic without providing a new complicated and expensive measuring instrument in the RPF production plant, and generates the heat of the product RPF. The amount can be estimated accurately, and the equipment and manufacturing process can be rationalized.
[Brief description of the drawings]
FIG. 1 is a block diagram of an RPF manufacturing plant to which one embodiment of an RPF calorific value estimation device of the present invention is applied.
FIG. 2 is a perspective view illustrating an actuator of a material sorter used in the present embodiment.
FIG. 3 is a diagram illustrating an actuator drive mechanism in the present embodiment.
FIG. 4 is a drawing for explaining the calculation principle for estimating the amount of vinyl chloride plastic in the present embodiment.
FIG. 5 is a configuration diagram of an RPF heat generation amount estimation apparatus of the present embodiment.
FIG. 6 is a configuration diagram of an apparatus to which an automatic adjustment function of an RPF calorific value is added in the present embodiment.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Waste plastic supply conveyor 2 Crusher 3 Conveyor 4 Rim 5 Material sorter detector, material sensor 6 Chute 7 Air blowing hole 8 Air nozzle, Air blowing valve 9 Air header 10 Solenoid valve 11 Partition plate 12 Vinyl chloride recovery box 13 Sorting line Conveyor 14 Mixing hopper 15 Used paper supply conveyor 16 Used paper crusher 17 Used paper transport conveyor 18 Molding machine 19 Storage location 21 Vinyl chloride region 22 Air blown region 30 Plant controller 31 Material sorter 32 Controller 33 Heat generation amount estimation device 34 Communication unit 35 Database 36 Calculation unit 37 Display device

Claims (7)

In the process of producing RPF (refuse paper and plastic fuel) by crushing and mixing waste paper and waste plastic, and forming a material sorter after the crusher to sort based on the type of plastic, speed The waste plastic supply conveyor and the waste paper supply conveyor are transported to the waste plastic supply conveyor and the waste paper supply conveyor, and the supply amounts of both materials are determined using the respective speeds of the waste plastic supply conveyor and the waste paper supply conveyor and the supply conveyor amount conversion factor. Calculate the amount of vinyl chloride removed by the material sorter on the basis of the measurement signal or operation signal of the material sorter, and calculate the amount of waste plastic and the waste paper supply by subtracting the vinyl chloride. A method for estimating the amount of heat generated by an RPF, wherein the amount of heat generated by the product RPF is estimated. The material sorter is provided with a material measuring device for determining the type of plastic above a conveyor that conveys waste plastic, and a large number of air nozzles that can be individually controlled to open and close across the traveling direction are arranged at the end of the conveyor, When the passage of vinyl chloride is detected by the material measuring device, when the vinyl chloride is carried to the position of the air nozzle, the air nozzle in the corresponding position is operated to blow out the vinyl chloride and eliminate the removal. 2. The RPF heat generation amount estimation method according to claim 1, wherein the amount of vinyl chloride is calculated based on the number of operated air nozzles and the speed of the conveyor. 3. The RPF calorific value estimation method according to claim 2, wherein the material measuring device is configured to irradiate a near infrared ray on a target and estimate the material from a wavelength distribution of reflected light. The said material measuring device detects the material of a plastic, It estimates the supply amount for every kind of plastic, and estimates the emitted-heat amount of the said product RPF, It is characterized by the above-mentioned. The RPF calorific value estimation method according to any one of the above. Further, the target value of the heat generation amount of the product RPF is inputted, and the conveyor speed is adjusted by the control device for the waste paper supply conveyor and the waste plastic supply conveyor so that the actual product RPF heat generation amount approaches the target value. 5. The RPF calorific value estimation method according to claim 1, wherein control is performed. A waste paper supply conveyor and a waste plastic supply conveyor that can adjust the speed are provided, and the waste plastic conveyor is provided with a material sorter to remove vinyl chloride and produce RPF to produce an RPF product RPF calorific value a estimation device, enter the result of measurement of the plastic of each type from said material quality sorter, said conveyor speed by entering the respective conveyor speed from the control device of the used paper feed conveyor waste plastic supply conveyor And a supply conveyor amount conversion coefficient to calculate the supply amount of both materials, and to calculate the heat generation amount of the product RPF from the plastic amount for each type and the supply amount of the both materials, . The product RPF calorific value estimation device further inputs a target value of the calorific value of the product RPF, and adjusts the conveyor speed by the waste paper supply conveyor and waste plastic supply conveyor control device to actually generate the product RPF heat generation. The RPF calorific value estimation device according to claim 6, further comprising a control device that controls the amount to approach the target value.

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