JPH09191864A - Roasting control for grain or the like and system therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a high-quality roasted product by detecting the temperature of a roasting medium such as sand in a roasting drum and by finely controlling the heating level of a heating means such as a burner so as to stably control medium temperature optimally based on the temperature detected above, and to provide a system for obtaining the high-quality roasted product. SOLUTION: A roasting drum 9 set up in a hot oven 5 and being in low-speed revolution is charged with a roasting medium B such as sand subject to circulatory heating and grains K, etc., which are then heated and roasted, and the roasted grains, etc., and the roasting medium B are discharged via the outlet on the other end of the drum 9. In this process, at least the temperature T1 of the roasting medium B in the drum 9 is detected and the medium is subjected to heating control so as to bring the temperature of the medium B to an optimum roasting temperature set value TB.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to cereals (barley, wheat, soybeans, brown rice) and roasted tea using roasting media such as sand.
Regarding the technology for manufacturing roasted products such as barley tea, the temperature of the roasting medium such as sand in the roasting cylinder is detected so that the roasting temperature is accurately and stably controlled, and the heating amount of the heating means such as burners is adjusted. It is finely controlled so that high quality roasted products can be produced.

[0002]

2. Description of the Related Art Conventionally, as a roasting machine for grains and the like, for example,
As seen in Jitsuko Sho 61-78, a rotary sand bath type grain roaster for roasting grains and the like with sand using a roasting drum that rotates around a horizontal axis placed in a furnace, It is provided that the sand identified as the roasted grains is transferred to the outer periphery of the stirrer. Then, the sand returning transfer pipe is heated by the combustion heat of the burner, and the sand flowing inside is heated to a predetermined roasting temperature, and then mixed with the grains into the roasting drum and roasted. Is.

The heating means for sand in the above-mentioned conventional grain roasting machine includes (1) means for adjusting the exhaust gas temperature discharged from the furnace to a target value by adjusting the combustion heat quantity of the burner, and (2)
There is a method of detecting the roasted product temperature and adjusting this to a target value. In both cases, the heating temperature of sand is indirectly controlled to a target value. A method of controlling the sand temperature for adjusting the exhaust temperature to the target value is shown in FIG. That is, it takes about 20 minutes to heat the inside of the furnace with a predetermined combustion amount of a predetermined burner to raise the exhaust temperature to a target value (around 500 ° C.) before roasting the grains. Roast the sand inside (2
It has been empirically required to require a heating time of about 40 minutes in order to raise the temperature to about 50 ° C.), so heating in the furnace is performed only for this time. The roastable temperature range (200
(-300 ° C.) When considering the timing of Y, a predetermined amount of grains is put into the roasting drum together with sand, and roasting proceeds at an appropriate temperature (about 250 ° C. for barley tea).

As shown in FIG. 10, the above roasting operation indirectly assumes that the sand in the roasting cylinder is within the roastable temperature range Y after a heating time of about 40 minutes by the burner. Start roasting operation. First, the grain feed rate is at least around 25% of the maximum value for test roasting. Then, the supply amount of 50 to 70% of cereals is intermittently increased several times, and finally the supply amount is 100%. At this time, the roasting temperature fluctuates up and down, but it is performed within the roastable temperature range (200 to 300 ° C.) Y.

[0005]

However, in the control method for setting the exhaust temperature to the target value (about 500 ° C.),
The roasting temperature is 250 with the burner for about 40 minutes.
When it is assumed that the temperature has reached around ℃ or slightly above that temperature, 25% or more of the test grains must be supplied together with sand into the roasting cylinder. That is, if there is a time delay in the supply of cereals, the sand temperature in the roasting cylinder will reach the proper roasting temperature (around 250 ° C.) within a short time as shown in FIG.
There is a problem that the temperature rises to 15 ° C. and greatly exceeds the temperature, resulting in roasting treatment in an overheated state. Also, when the amount of grains supplied to the roasting cylinder is as small as 25% or less of the maximum value, the roasting process in the overheated state is performed similarly to the above. Furthermore, if the supply of cereals is extremely small or if the supply is suddenly stopped from the operating state, there is a risk of overheating the inside of the furnace and igniting the cereals. Then, as shown in FIG. 10, when the amount of cereals supplied to the roasting cylinder fluctuates from a predetermined amount, the sand temperature fluctuates and easily deviates from the appropriate temperature for roasting. There is a problem in that the degree of roasting changes and the quality of roasted products deteriorates. In order to obtain a high quality roasted product, it is desired that the roasting temperature (for example, 250 ° C.) is within ± 1 ° C. within a deviation.

The above problems also occur during test roasting. That is, since a small amount of grain is roasted in a superheated state, it is inevitable to supply 25% or more of the maximum grain as test roast. Therefore, there is a problem that a large number of defective products are produced during the test roasting.

Further, in the control method for heating the exhaust gas temperature to the target value (about 500 ° C.), the proper roasting temperature (about 250 ° C.) of the sand temperature in the roasting barrel is controlled by the heating time. It is not possible to control and control the heating time when reheating immediately after the roaster is stopped and the furnace is not cold. It has been found that at the time of starting operation, unless the temperature in the furnace is the same under a predetermined condition every time, it causes a large error and is not suitable for practical use. In addition, the time required for the sand to reach the roasting temperature greatly changes depending on the amount of sand held, but the amount of sand held cannot be grasped, and it changes because it is discharged to the outside every day together with the roasted product although it is a small amount. . Therefore, there is a problem that the heating time cannot be controlled accurately. Further, in the method of detecting the temperature of the roasted product, when the flow of the product is stopped, it cannot be detected and cannot be put to practical use. As described above, the conventional roasting machine is poor in operation operability and can be used only by an expert.

The present invention has been developed in view of various problems found in the above-mentioned conventional grain roasting machine, and at least the temperature of the roasting medium such as sand in the roasting drum is detected and detected. Method and apparatus for producing a high quality roasted product by finely controlling the heating amount of a heating means such as a burner so that the sand temperature is stably controlled to an optimum value (deviation of ± 1 ° C or less) based on the temperature The purpose is to provide.

[0009]

In order to achieve the above object, the method for controlling roasting of grains and the like according to claim 1 according to the present invention comprises:
A grain is mixed with a roasting medium such as sand that is circulated and heated in a roasting cylinder that is placed in a heating furnace and rotates at a low speed, and is roasted by heating, and roasted from the other end outlet of the roasting cylinder. In the roasting control method of discharging the grains and the like and the roasting medium, at least the temperature of the roasting medium in the roasting cylinder is detected so that the temperature of the roasting medium becomes the optimum roasting temperature set value. It is characterized in that the roasting medium is heated and controlled.

According to the above control method, first, the temperature of the roasting medium in the roasting cylinder is detected. The heating amount of the heating means such as a burner is quickly adjusted so that this temperature becomes the optimum roasting setting temperature. With this, the heating temperature of the roasting medium can be accurately and responsively maintained at the target value of the optimum roasting set temperature, and a high quality roasted product can be produced under a simple operation operation.

A second aspect of the present invention for achieving the above object.
The roasting control device for grains and the like described includes a roasting cylinder that is placed in a heating furnace and rotates at a low speed, and a roasting medium such as sand that is heated and circulated by a heating means such as a burner outside the roasting cylinder and a roasting medium. A roasting control device that mixes grains and the like into the roasting barrel from one end inlet and discharges the roasted grains and the like and the roasting medium from the other end outlet while being heated and roasted in the movement process inside the roasting barrel In, the temperature detection means of the roasting medium in the roasting cylinder, the roasting temperature setting means for setting the roasting medium to the optimum roasting temperature set value, and the detection temperature of the roasting medium to the optimum roasting temperature And a heating amount control means for adjusting the heating amount of the heating means for the roasting medium so that the roasting medium reaches a set value.

First, the temperature of the roasting medium in the roasting cylinder is detected by the temperature detecting means. The heating amount of the heating unit such as a burner is quickly adjusted by the heating amount control unit so that this temperature becomes the optimum roasting setting temperature determined by the roasting temperature setting unit. With this, the heating temperature of the roasting medium is accurately and responsively maintained at the target value of the optimum roasting set temperature. Therefore, it becomes a manufacturing apparatus for manufacturing a high-quality roasted product under a simple operation operation.

A third aspect of the present invention for achieving the above object.
The roasting control method for the grains and the like described is a roasting drum which is placed in a heating furnace and rotates at a low speed, and the grains and the like are mixed with a roasting medium such as sand to be heated and circulated, and the roasted and roasted. In the roasting control method of discharging the roasted grains and the roasting medium from the other end outlet of the roasting drum, the exhaust gas temperature in the heating furnace is heated to a temporary target value and the exhaust gas temperature is detected, In addition, the temperature of the roasting medium in the roasting cylinder is detected, and the target value of the exhaust temperature is set in a direction in which the deviation between the temperature detection value of the roasting medium and the preset optimum roasting temperature set value decreases. It is characterized in that the roasting medium is heated and controlled by adjusting the amount.

First, the temperature of the exhaust gas itself is controlled according to a target value that is temporarily set in advance. Subsequently, the target value of the exhaust temperature is updated in a direction to reduce the deviation between the detection temperature of the sand as the roasting medium and the optimum roasting set temperature, and is updated so as to reach the optimum roasting set temperature. The heating amount of the heating means such as a burner is quickly adjusted with the target value of the exhaust temperature.
With this, the heating temperature of the roasting medium can be accurately maintained at the target value of the optimum roasting set temperature, and a high-quality roasted product can be manufactured under a safe and simple operation operation.

In order to achieve the above-mentioned object, claim 4 of the present invention
The roasting control device for grains and the like described includes a roasting cylinder that is placed in a heating furnace and rotates at a low speed, and a roasting medium such as sand that is heated and circulated by a heating means such as a burner outside the roasting cylinder and a roasting medium. In a roasting control device that mixes grains and the like into the roasting barrel from one end inlet and discharges roasted grains and the like and the roasting medium from the other end outlet while being roasted in the movement process in the roasting barrel , Exhaust temperature detecting means for exhaust temperature in the heating furnace, temperature detecting means for the roasting medium in the roasting barrel, roasting temperature setting means for setting an optimum roasting temperature value, and roasting medium for the roasting medium. Exhaust temperature setting means for updating the target value of the exhaust temperature in the direction of decreasing the deviation between the detection value of the temperature detecting means and the optimum roasting temperature value, and the exhaust temperature to be the updated target value of the exhaust temperature. Heating amount control means for adjusting the heating amount of the heating means.

First, the exhaust gas temperature itself is temperature-controlled according to a target value which is temporarily set by the exhaust gas temperature setting means.
Subsequently, the target value of the exhaust temperature is updated by the result of the deviation calculation in the direction of decreasing the deviation between the detected temperature of the sand as the roasting medium and the optimum roasting set temperature. The heating amount of the heating unit such as a burner is quickly adjusted by the heating amount control unit so that the optimum target roasting temperature is reached by the updated target value of the exhaust gas temperature. With this, the heating temperature of the roasting medium can be accurately maintained at the target value of the optimum roasting set temperature, and it is possible to provide a manufacturing apparatus that manufactures high-quality roasted products under safe and simple operation operation. .

[0017]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to FIGS. FIG. 1 is a sectional view of a roasting apparatus for carrying out the roasting control method of the present invention, FIG. 2 is a sectional view of the entire system showing a first embodiment of the roasting control method and apparatus of the present invention, and FIG. It is a flowchart figure for implementing embodiment. FIG. 4 is a sectional view of the entire system showing the second embodiment. FIG. 5 is a flow chart for implementing the second embodiment. FIG. 6 is a heating characteristic curve diagram of sand, and FIGS. 7 and 8 are roasting characteristic curve diagrams according to the present invention.

First, a roasting apparatus 100 to which the present invention is applied.
As shown in FIG. 1, a combustion chamber 5A is formed in a lower space of a heating furnace 5 surrounded by a heat insulating heat insulating material 3 in a frame body 1, and a burner 7 as a heating means is arranged at a lower corner of the combustion chamber 5A. There is. An exhaust pipe 5B is provided in the upper part of the heating furnace 5, and an exhaust damper 5C is provided inside the exhaust pipe 5B. Further, in the heating furnace 5, a roasting cylinder 9 of the grain K that rotates around the horizontal axis 2 and an outer cylinder 15 of a jacket that heats sand such as silica sand or ceramic grains that is the roasting medium B, It is integrally provided on the outer circumference of the roasting cylinder 9. The horizontal shaft 2 is composed of two heat resistant bearings 11 on the frame body 1,
A sprocket 17, which is rotatably supported by 13 and is fitted to one side of the horizontal shaft 2, is connected to a sprocket 19 of a drive motor M with a reduction gear and a chain 21. By the drive of the drive motor M, the roasting cylinder 9 and the outer cylinder 15 are integrally rotated at a low speed. The roasting drum 9 is held by a support rod 20 in the middle abdomen and a support piece 22 on the left end side with respect to the horizontal shaft 2.

The roasting barrel 9 and the outer barrel 15 form a conical surface in which the inner peripheral walls are enlarged in opposite directions, and the inner wall of the roasting barrel 9 has a small diameter. It is equipped with a raw material guide tube 23 in the shape of a cylinder, and is attached to a horizontal shaft by a support piece 21. Further, a raw material guide hopper 25 for feeding the grain K into the raw material guide pipe 23 is arranged on the frame body 1. The grain K is supplied from the raw material guiding hopper 25 through the raw material guiding pipe 23 by being naturally dropped to the inner peripheral wall of the roasting drum 9 on the small diameter side. Then, due to the low speed rotation of the roasting cylinder 9, the grain K is slowly transferred from the small diameter side of the roasting cylinder 9 to the large diameter side. The roasted grains K include wheat, barley, soybean, brown rice, roasted green tea, barley tea and the like.

Further, a wire mesh cylinder 27 for separating the roasting medium B and the grain K is detachably connected to the large-diameter end of the roasting drum 9 by a bolt fastening means, and the size of the wire mesh is smaller than that of the wire mesh. The roasting medium B falls on the inner peripheral wall surface of the outer barrel 15 on the small diameter side, and the grain K larger than the mesh is discharged from the open end of the separation wire mesh cylinder 27 to the product hopper 29. The roasting medium B in the outer barrel 15 is transferred to the large diameter side by the low speed rotation of the roasting barrel 9 and the outer barrel 15 while being heated by the burner 7 and is deposited on the roasting medium B.
Is sent into the roasting drum 9 by a recovery bucket 31 attached to the outer peripheral wall of the roasting drum 9. The roaster is placed in a heating furnace and is rotated at a low speed. A roasting medium such as sand that is circulated and heated is mixed with grains and the like to heat and roast the roasting cylinder. Any structure may be used as long as the roasted grains and the roasting medium are discharged from the other end outlet, and the structure is not limited to the illustrated embodiment. For example, the roasting medium and the grains may be discharged from the roasting drum, and then the roasting medium and the grains may be sieved to return the roasting medium to the outer barrel of the roasting machine.

Therefore, the roasting device 100 includes the roasting barrel 9,
The outer barrel 15 rotates at a low speed, and the roasting medium B in the outer barrel 15 heated to an appropriate temperature by the burner 7 is supplied into the roasting barrel 9 together with the grain K. While the grain K is being transferred in the roasting drum 9,
The roasting medium B heated to an appropriate temperature receives a roasting action, and the roasted grains K are discharged from the open end of the separation wire netting cylinder 27 to the product hopper 29. The roasting medium B has a circulation path in which it is returned to the outer case 15 and heated again.

The roasting control method and apparatus according to the first embodiment of the present invention will be described with reference to FIG. The roasting device 100 is the same as that shown in FIG. 1, and the exhaust gas temperature detecting means 40 for detecting the exhaust gas temperature heated by the burner 7 is the heating furnace 5.
It is arranged in the inner exhaust stack 5B. Further, the temperature detecting means 50 for the roasting medium B is arranged in the roasting cylinder 9 in the vicinity of the mounting portion of the separation wire netting cylinder 27 so as not to disturb this rotation. As the temperature detecting means 40 and 50, for example, thermocouple temperature sensors are adopted.

Next, the temperature controller 80 will be described.
First, the roasting temperature controller 55 sets the sand temperature detection value T1 of the roasting medium B detected by the sand temperature detecting means 50 and the roasting temperature setting means 53 so as to control the roasting temperature at a constant temperature. The operation amount MV1 is calculated and output in the direction of decreasing the deviation α from the optimum roasting temperature set value TB. Further, the exhaust gas temperature control unit 45 at the next stage is configured to control the exhaust gas temperature itself to a constant temperature, and the exhaust gas temperature T2 detected by the exhaust gas temperature detecting unit 40 and the exhaust gas temperature provisional target provided by the exhaust gas temperature setting unit 43. In the direction of decreasing the deviation β from the value TH, the manipulated variable MV
2 is calculated and output. The combustion amount control unit 47 controls the fuel control valve V to adjust the combustion amount of the burner 7 according to the operation amount MV2 output from the exhaust gas temperature control unit 45. A fuel supply pump may be adopted instead of the fuel control valve V.

The target value TH of the exhaust temperature control unit 45 is changed by the output MV1 of the roasting temperature control unit 55 in the preceding stage.
That is, the exhaust temperature target value TH is controlled so that the sand temperature detection value T1 of the roasting medium B is constantly controlled to the optimum roasting temperature set value TB, and the heating temperature of the roasting medium B is optimum. The deviation α from the temperature value TB is precisely controlled to ± 1 ° C or less.

Next, the roasting control method according to the first embodiment will be described with reference to the control flow chart shown in FIG. At the "start" (1), a start command is issued to the temperature control unit 80 and the drive motor M to rotate the roasting drum 9, and each unit (40 to 55, V, etc.) of the temperature control unit 80 simultaneously functions. .
With this, first, the "exhaust temperature detection T2" (3) and the "sand temperature detection T1" (4) are performed by the respective detection means 40, 50. At the time of start-up, the exhaust temperature control process is made to function, and the “temporarily set target value TH” determined in advance by the exhaust temperature setting means 43 is set.
The "exhaust temperature control unit 45" (6) calculates the combustion amount MV2 with (5) as the target value, the "combustion amount control unit 47" (7) controls the fuel supply amount of the fuel control valve V, and the burner 7 The temperature is controlled toward the "temporarily set target value TH" (5) by adjusting the combustion amount of.

Then, the sand temperature control process operates to "detect the sand temperature" of the sand which is the roasting medium B (4) and "set sand temperature TB" which is the optimum roasting temperature of this grain K ( The deviation α from 8) is calculated by the “roasting temperature controller 55” (9), and the manipulated variable MV1 is calculated and output so that the deviation α approaches 0.
The "exhaust temperature control unit 45" (6) in the next stage has this manipulated variable MV1
Is taken as the “exhaust temperature target value TH”, the deviation β from the “exhaust temperature detection value T2” (3) is calculated, and the combustion amount MV2 is calculated and output so that the deviation β approaches 0. Based on the combustion amount MV2, the "combustion amount control unit 47" (7) controls the fuel supply amount of the fuel control valve V to increase or decrease the combustion amount of the burner 7. By controlling the exhaust gas temperature to the target value of the exhaust gas temperature updated by the roasting temperature control unit 55, the sand temperature is set to the optimum roasting set temperature. Simply put,
The roasting temperature control unit 55 issues a command (MV1) to set the temperature of the exhaust gas to the optimum roasting set temperature, and the exhaust gas temperature control unit 45 becomes constant at the commanded exhaust gas temperature. So that the temperature is controlled.

FIG. 6 shows a heating characteristic curve of sand as the roasting medium B based on the above control method. Predetermined "sand temperature set value TB", "exhaust temperature target value TH", and exhaust temperature detection T2
And the sand temperature detection T1 to control the combustion amount of the burner 7 to temporarily raise the exhaust gas temperature to 600 ° C., and the sand temperature is delayed to rise to the roasting temperature (around 250 ° C.) to reach the target value. The heating characteristics are such that the exhaust temperature is stable (around 300 ° C.). After this, as shown in FIG. 6, the combustion amount of the burner 4 is controlled so as to maintain the exhaust temperature at a stable target value (around 300 ° C.).

Then, after the above warming up,
As shown in FIG. 3, the "grain supply" (12) is performed into the roasting drum 9 including the grain roasting operation, and the finished grain K is "grain discharged" (15). The roasting operation of the grain K proceeds as shown in the roasting characteristic curve diagrams shown in FIGS.
This situation is caused by the disturbance (variation in grain supply, etc.) that occurs in the “sand temperature process” (14) in the flowchart of FIG.
Is output as the calculation result of the deviation α from the “sand temperature set value TB” (8) by the “sand temperature detected value T1” (4) in the first loop. This output calculates the deviation β of the disturbance (fuel fluctuation or ambient temperature fluctuation) that occurs in the “exhaust temperature process” (13) from the exhaust temperature detection value that is the second loop, and calculates the target value TH as a new “target value”. TH ”(11). The combustion amount of the burner 7 is adjusted by the combustion amount control unit 47 so that the updated target value of the exhaust temperature reaches the optimum roasting setting temperature (around 250 ° C.) of the “sand temperature setting value TB” (8). To be done. Then, when the operation is stopped, the function of the temperature control unit 80 is stopped to extinguish the burner, and the rotation of the roasting cylinder 9 is stopped.

Therefore, when the "grain supply" (12) of the grain K is continuously increased, the roasting characteristic curve diagram shown in FIG. 7 is obtained.
Test roasting can be performed accurately even with a few percent grain supply, so high quality roasted products can be confirmed. After that, a full-scale roasting operation of the grain K is performed by continuously increasing the amount of the grain from about 10% to 100%. The combustion amount control unit 47 adjusts the combustion amount of the burner so that the optimum roasting set temperature (around 250 ° C.) is maintained at the target value of the exhaust temperature that is sequentially updated to the high temperature side in accordance with the continuous increase of the grain K. Adjusted. The roasting operation is similarly performed in the roasting characteristic curve diagram of FIG. 8 showing the case where the “grain supply” (12) of the grain K is stepwise increased.

As described above, according to the roasting control method and the apparatus therefor of the first embodiment, the following effects can be obtained. First, it prevents the fluctuations in fuel pressure to the burner, large fluctuations in the supply of roasted grains (eg, wheat), fluctuations in outside temperature and the effects of other disturbances such as the temperature inside the furnace at startup on sand temperature, There is an effect that the temperature of the roasted sand B can always be accurately controlled to the optimum set value. Thereby, there is an effect that a high-quality roasted product can be provided in the range from the case where the amount of grains such as wheat is small to the case where the amount thereof is large. In addition, test roasting requires only a very small amount of grain, and it is a high quality roasted product.
It has the effect of suppressing the occurrence of defective roasted products. Further, there is an effect on safety that there is no danger of igniting the grain even when the amount of input of the grain is extremely small or the operation state is suddenly stopped. Therefore, a high-quality roasted product can be manufactured with high safety and simple operation.

Next, a roasting control method and apparatus according to the second embodiment of the present invention will be described with reference to FIG. Roasting device 100
Is the same as that shown in FIG. 1, and the temperature detecting means 40 for the exhaust temperature T2 and the target setting means 43 in the first embodiment are omitted. Therefore, only the temperature detecting means 50 for the roasting medium B in the roasting cylinder 9 is provided, and this is arranged near the attachment portion of the separation wire netting cylinder 27 of the roasting cylinder 9. In addition, the temperature control unit 90 detects the temperature detection value T of the roasting medium B.
A roasting temperature setting means 53 for setting 1 to be the optimum roasting temperature value TB, and a roasting temperature control section 55 for calculating a deviation α between the detection value T1 of the temperature detecting means 50 of the roasting medium B. ,
The fuel control valve V is composed of a heat quantity control unit 47 for adjusting the combustion quantity of the heating means 7 in the direction of decreasing the deviation α.

Next, a roasting control method according to the second embodiment will be described with reference to the control flow chart shown in FIG. At the "start" (1), a start command is issued to the temperature control unit 90 and the drive motor M to rotate the roasting drum 9, and each unit (40 to 55, V, etc.) of the temperature control unit 90 simultaneously functions. .
First, the "sand temperature detection" (4) is performed by the temperature detection means 50. The combustion start of the burner 7 is controlled by the "combustion amount control means 47" (7) which controls the fuel supply amount of the fuel control valve V with a predetermined "combustion amount adjustment value at startup" (A). Increase or decrease the amount of combustion. Next, the difference α between the “sand temperature detection” (4) of the sand that is the roasting medium B and the “sand temperature set value TB” (8) that is the optimum roasting temperature of this grain K is calculated for the “roasting”. The "combustion amount control means 47" (7) controls the fuel supply amount to the burner 7 via the fuel control valve V in the direction of decreasing the deviation, based on the processing result from the roasting temperature control unit 55 "(9), The combustion amount of the burner 7 is adjusted to control the temperature toward the "sand temperature set value TB" (8).

The heating characteristic curve of sand for controlling the temperature of the roasting medium B is also as shown in FIG. The combustion amount of the burner 7 is controlled by a predetermined "sand temperature set value TB" and "sand temperature T1" to temporarily raise the exhaust gas temperature to 600 ° C, and the sand temperature is delayed, resulting in a roasting temperature (250 ° C). The heating characteristics are such that the exhaust temperature is stabilized to a target value (around 300 ° C.) as the temperature rises up to around.

By the above control method, the roasting medium B has a deviation α of ± 1 from the “sand temperature set value TB” (8) of the optimum roasting temperature.
It is controlled below ℃. After the above warming-up, the "grain supply" (12) is performed inside the roasting barrel 9, and the roasting operation of the grain K is performed with high precision. The roasting operation of the grain K also proceeds as shown in the roasting characteristic curve diagrams shown in FIGS. 7 and 8 as in the first embodiment.

According to the roasting control method and apparatus according to the second embodiment of the present invention, the temperature fluctuation in the roasting cylinder set to the optimum roasting set temperature can be suppressed to a small level, as in the first embodiment, and as a result, There is an effect that a high quality roasted product can be provided in the range from the case where the amount of grains such as wheat is small to the case where the amount is large. Also, test roasting requires only a very small amount of grains, and
Since it is a high-quality roasted product, it has the effect of suppressing the generation of defective roasted products. Further, there is an effect on safety that there is no danger of igniting the grain even when the amount of input of the grain is extremely small or the operation state is suddenly stopped. Therefore, a high-quality roasted product can be manufactured with high safety and simple operation.

The present invention is not limited to the above embodiments,
Design changes are possible within the gist of the invention. For example, the method of the temperature detecting means 40, 50 can be changed from a thermocouple to a sensor for measuring temperature of another method, and other members 43, 4 can be used.
5, 47, 53, 55, V, etc. can be appropriately changed.
In addition to the burner, the heating means 7 can be changed to an electric heater or a steam heating method. Further, it is possible to install various alarm members in the roasting device 100 of the present invention. For example, it is desirable to appropriately install an alarm for notifying the temperature variation of the roasting medium B, a fire detection alarm, and the like. Further, an alarm may be provided to notify the reduction, interruption, and stop of the raw material generated during the operation, and the stop of the burner.

[0037]

As described in detail above, according to claim 1 of the present invention, the temperature of the roasting medium in the roasting cylinder is detected, and the heating means such as a burner is used so that this temperature becomes the optimum roasting set temperature. Since the heating amount is adjusted rapidly, the heating temperature of the roasting medium can be maintained accurately and responsively to the target value of the optimum roasting set temperature, and high quality roasted products are manufactured based on simple operation. The effect that can be achieved is exhibited.

According to the second aspect of the present invention, the temperature of the roasting medium in the roasting cylinder is detected by the temperature detecting means, and this temperature becomes the optimum roasting set temperature determined by the roasting temperature setting means. Since the heating amount of the heating means such as a burner is quickly adjusted by the heating amount control means, there is an effect that it is possible to provide a manufacturing apparatus capable of keeping the heating temperature of the roasting medium at the target value of the optimum roasting set temperature with good responsiveness. .

Further, according to claim 3 of the present invention, the exhaust gas temperature itself is temperature-controlled to a target value which is provisionally set in advance, and the deviation between the detected temperature of the sand as the roasting medium and this optimum roasting set temperature is reduced. The target value of the exhaust temperature is updated in the direction of the roasting, and the heating amount of the heating means such as the burner is quickly adjusted with the updated target value of the exhaust temperature so that the optimum roasting set temperature is reached. The heating temperature of can be maintained accurately and responsively to the target value of the optimum roasting set temperature, and it is effective in producing high quality roasted products under safe and simple operation. .

Further, according to claim 4 of the present invention, the exhaust gas temperature itself is temperature-controlled to a target value which is temporarily set in advance by the exhaust gas temperature setting means, and subsequently, the detection temperature of the sand as the roasting medium and the optimum roasting temperature are detected. In order to reduce the deviation from the roast set temperature, the target value of the exhaust temperature is heated by the heating means such as a burner so that the target value of the exhaust temperature updated by the result of the deviation calculation will be the optimum roast set temperature. Since the amount is quickly adjusted by the heating amount control means, the heating temperature of the roasting medium can be accurately maintained at the target value of the optimum roasting set temperature, and high quality is achieved under safe and simple operation. It is possible to provide a manufacturing apparatus for manufacturing various roasted products.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a roasting device for carrying out a roasting control method according to an embodiment of the present invention.

FIG. 2 is a view showing an embodiment of the present invention, and is a sectional view of the entire system showing a first embodiment of a roasting control method and apparatus.

FIG. 3 is a view showing an embodiment of the present invention, and is a flow chart for operating the first embodiment.

FIG. 4 is a view showing an embodiment of the present invention and is a sectional view of the entire system showing a second embodiment of the roasting control method and apparatus.

FIG. 5 is a diagram showing an embodiment of the present invention, and is a flow chart diagram for operating the second embodiment.

FIG. 6 is a diagram showing an embodiment of the present invention and is a heating characteristic curve diagram of sand.

FIG. 7 is a diagram showing an embodiment of the present invention and is a roasting characteristic curve diagram.

FIG. 8 is a diagram showing an embodiment of the present invention and is a roasting characteristic curve diagram.

FIG. 9 is a diagram showing a conventional example, which is a heating characteristic curve diagram of sand.

FIG. 10 is a diagram showing a conventional example and is a roasting characteristic curve diagram.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Frame 3 Insulating heat insulating material 5 Heating furnace 7 Burner (heating means) 9 Roasting barrel B Roasting medium (sand) K Grains 15 Outer barrel 27 Separation wire mesh cylinder 40 Temperature detecting means 50 Temperature detecting means 43 Exhaust temperature setting means 45 Exhaust temperature control unit 47 Heating amount control unit 53 Roasting temperature setting unit 55 Roasting temperature control unit 80,90 Temperature control unit 100 Roasting device T1 Sand temperature detection value T2 Exhaust temperature TB Optimum roasting temperature value TH Exhaust temperature target Value V Fuel control valve α, β deviation

Claims (4)

[Claims] 1. A roasting cylinder, which is placed in a heating furnace and rotates at a low speed, mixes grains and the like together with a roasting medium such as sand that is circulated and heated, and heats and roasts the other end of the roasting cylinder. In a roasting control method of discharging roasted grains and the like from an outlet and a roasting medium, at least the temperature of the roasting medium in the roasting cylinder is detected, and the temperature of the roasting medium is set to the optimum roasting temperature. A method for controlling roasting of cereals and the like, which comprises heating and controlling the roasting medium so that the value becomes a value. 2. A roasting cylinder arranged in a heating furnace and rotating at a low speed, wherein a roasting medium such as sand and grains which are heated and circulated outside the roasting cylinder by a heating means such as a burner and the like are roasted. In the roasting control device, which mixes into the barrel from one end and is heated and roasted during the movement process in the roasting barrel and discharges the roasted grains and the roasting medium from the other end outlet, A roasting medium temperature detecting means, a roasting temperature setting means for setting the roasting medium to an optimum roasting temperature set value, and a roasting medium detection temperature for setting the roasting medium detection temperature to an optimum roasting temperature set value. A roasting control device for grains and the like, comprising: a heating amount control means for adjusting the heating amount of the heating means for the roasting medium. 3. A roasting drum, which is placed in a heating furnace and rotates at a low speed, is mixed with grains and the like together with a roasting medium such as sand to be heated and circulated for heating and roasting, and the other end outlet of the roasting drum. In a roasting control method for discharging roasted grains and the like from a roasting medium,
The exhaust temperature in the heating furnace is heated to a temporary target value and the exhaust temperature is detected, and the temperature of the roasting medium in the roasting cylinder is detected, and the temperature detection value of the roasting medium and the temperature are detected in advance. A roasting control method for cereals and the like, wherein the target value of the exhaust gas temperature is adjusted so as to decrease the deviation from the set optimum roasting temperature setting value to control the heating of the roasting medium. 4. A roasting cylinder arranged in a heating furnace and rotating at a low speed, and a roasting medium such as sand and a grain which are heated and circulated by a heating means such as a burner outside the roasting cylinder and the grain are roasted. In the roasting control device that mixes from the one end inlet into the body and discharges the roasted grains and the roasting medium from the other end outlet while being roasted in the movement process in the roasting body, Exhaust temperature detecting means for exhaust temperature, temperature detecting means for roasting medium in the roasting cylinder, roasting temperature setting means for setting an optimum roasting temperature value, and detection value for the roasting medium temperature detecting means Exhaust temperature setting means for updating the target value of the exhaust temperature in the direction of decreasing the deviation between the set temperature and the optimum roasting temperature, and the heating amount of the heating means so that the exhaust temperature becomes the updated target value of the exhaust temperature. A roasting control device for grains and the like, which comprises: