JPS6222898A - Sterilizer control apparatus in palm oil mill - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] <Industrial Application Field> This invention is intended to facilitate separation of palm fruit from branches and leaves in a palm oil mill that squeezes edible oil from fibers in palm fruit. This relates to a steam heat treatment device (hereinafter referred to as Sterilizer) used in the pretreatment process of
When operating sequentially, a spike in the total steam load demand on all Sterilyzers due to delays in loading or unloading material to each Sterilyzer is avoided. This invention relates to improvements to the Sterilyzer control device.

<Prior Art> An example of the configuration of a typical palm oil mill is shown in FIG.

A cage operation field 2 is provided in front of a plurality of Sterilyzers (one of which is shown), and a cage 2a for carrying in the material to be treated is placed in a moving section. . A cage crane 3 is installed on the rear of Sterilyzer 1.
is provided, and a stripper 4 is arranged within its travel range.

Further to the rear of the stripper 4, a guijester 5 and a screw press 6 connected to the lower part thereof are arranged,
The stripper 4 and the screw press 6 are connected to each other via a fruit conveying device 7. A vibrating screen 9 is opened at the fruit juice outlet of the separation groove 8 extending below the screw press 6. A fruit juice tank 10 is provided, and an oil-water separator 11 is arranged behind it.

On the other hand, a fiber separating device 12 follows the nut fiber outlet of the separation groove 8, and its discharge pipe 13 branches into a nut conveying tube 13a and a fiber conveying tube 13b. It extends to cyclone 14. The outlet of the fiber cyclone 15 faces the inlet end of the fiber conveying device 15, and the outlet end of the fiber conveying device 15 faces the fuel supply port 16a of the boiler 16 as steam supply means.

A steam supply pipe 16b extends from the boiler 16 to a Sterilizer control device 17 provided for each Sterilizer 1,
Via this, it further extends to the Sterilizer I, and a control valve 17a is inserted therebetween. The steam supply pipe 18b is
It branches in the middle and is connected to the Guijesta 5, and further branches and extends to a hot water tank 18, and hot water 18a from the tank 8 is connected to the screw press 6.

During operation, palm fruits and leafy twigs (Fresh Fruits B) are used as materials to be treated.
unsfes) is mounted on the gauge 2a, arranged for each Sterilyzer to be distributed to a plurality of Sterilyzers 1 in the gauge operation field 2, and transported together with the gauge 2a into a predetermined Sterilyzer.

In this Stellizer I, the material to be treated that has been brought in is subjected to steam heat treatment according to a predetermined intermittent pattern that will be detailed later.
The fruit can be easily separated from leaves and twigs. In other words, the steam heating here makes the fruits easy to peel off from the branches, thereby increasing the yield when the fruits are separated in the subsequent stripper 4.

The material to be treated that has been steam-treated in the Stellizer 1 is taken out from here, lifted up by the crane 3 along with the gauge 2a, and carried above the stripper 4, where it is overturned so that only the material to be treated is transferred to the stripper. 4 will be introduced.

In stripper 4, the fruit is picked from the branch.

The remaining branches and leaves (E++pty Bunches) are discarded.

On the other hand, the picked fruit is carried above the digester 5 by the fruit conveying device 7 and thrown there.

Here, the fruit, which is the material to be treated, is subjected to wave sound by stirring.
The pulp, nuts (seeds) and fruit juice are dismantled and sent to the lower screw press 6, where the oil and fat components contained in the fibers in the pulp are squeezed out.

These fruit juices, oil and fat components, as well as squeezed residue fibers and remaining nuts fall further down into the separation groove 8.
Here, the fruit juice is separated for 1 minute, and the fruit juice containing a large amount of oil and fat components is taken out from the juice outlet (right end in the figure). After being gathered, Yuki Separation +J! Here, the oil and fat components are separated and extracted, and thus,
Palm oil is produced. This palm oil is then exclusively used for food.

On the other hand, the remaining nuts, remaining fibers and other solid matter are taken out from the nut/fiber outlet of the separation groove 8, and these are conveyed to the fiber separating device 12, where the fibers and nuts are separated. The fibers pass through the fiber conveying pipe 13b, collect a certain volume in the fiber cyclone 14, and then are sent by the fiber conveying device 15 and introduced as fuel into the fuel supply port lea of the boiler IC, which is a steam supply means.

On the other hand, the nuts separated by the fiber separating device 12 are discharged through the nut conveying pipe +3a and are processed separately.

In this way, the fibers, which are by-products of the palm oil production process, are burned in the boiler 16, and the steam generated here is supplied to the digester 5 through the steam supply pipe 16b, and is further transferred to the hot water tank 18 for heat exchange. This hot water is passed through the hot water pipe IEla to the screw press 6.
supplied to Furthermore, this nokj spirit is the Sterilyzer control device! 7, and is supplied to the Sterilyzer 1 via this, but at this time, the steam is introduced into the Sterilyzer 1.

It is controlled by the Sterilizer control device 17 to follow a predetermined intermittent pattern.

The intermittent pattern of introducing steam into the Sterilizer 1 is shown in (I), (K), and (M) in Figure 2, and the steam heat treatment in the Sterilizer 1 according to this intermittent pattern facilitates fruit separation. It is already known both empirically and experimentally that it is suitable (Tropical Agriculture J 20(2), Pl.
ot-110, 1976).

The Sterilizer control device 17 for executing the 7M heat treatment according to the intermittent pattern includes a valve control circuit 30 as shown in FIG. Controls the opening and closing of the valve 17a.

That is, in FIG. 3, the input terminal 31 has a metastable time tl. Connected to the input terminal of the first monostable multivibrator 32, this first monostable multivibrator 32 further includes a second monostable multivibrator 33 whose metastable time is t2; The third monostable multivibrator 34 whose metastable time is t3, the fourth monostable multivibrator 35 whose metastable time is t4, and the fifth monostable multivibrator 36 whose metastable time [111 is E5], Each is cascaded in the order listed to form a pulse distributor. And a fifth monostable multivibrator 38
The output terminal of the flip-flop 38 extends to the reset terminal of the flip-flop 38. The set terminal of this flip-flop 38 is connected to the input terminal 31, and the output terminal of the flip-flop extends via a buffer amplifier 39 to a loaded yE signal terminal 40.

Furthermore, the output terminal of the fourth monostable multivibrator 35) is branched off and also connected to the input terminal of a sixth monostable multivibrator 37 whose metastable time is 70, and the output terminal of the multivibrator 37 is The terminal is the buffer amplifier 41
It extends to the pressure holding state signal terminal 42 via.

On the other hand, each output terminal of each of the first, third, and fifth monostable multivibrators 32, 34, and 36 is connected to each input terminal of an OR gate 41, and the output terminal of the OR gate is connected via a buffer amplifier 42 to It extends to the control valve 17a.

In operation, when the control signal Sl is supplied 4, in response, the first monostable multi-occurrer 32 shifts to a metastable state, and a pulse that continues for a metastable time 11 is activated by one of the OR gates 41. is supplied to the input terminal (Figure 2 (
A)) When the first monostable multi-octobrator 32 returns to the stable state after the metastable time tl has elapsed, the second monostable multivibrator 33 shifts to the semi-stable state, and the metastable time tl elapses. It remains in that state for only t2 (Fig. 2 (B
)).

Thereafter, the same operation spreads to the subsequent monostable multi-by break group, and the third monostable multi-octibrator 34
is a pulse that lasts for a quasi-stable time t3)4
1 (see Figure 2 (C)), then the fourth rl
When the stable multivibrator 35 is metastable, it remains in the metastable state for only Ifnt4 (FIG. 2(D)).

Subsequently, the fifth monostable multi-occurrer 36 applies a pulse lasting a metastable time t5 to the Oagene I.41.
(Fig. 2 (E)).

Thus, from the output terminal of the OR gate 41, each of the first, third, and fifth monostable multivibrators 32, 34, 3
6 remains in a metastable state, and the second,
During the two periods in which each of the fourth monostable multi-halators 33, 35 is in a metastable state, a pulse is output which disappears and is supplied to the control valve 17a through the buffer amplifier 42, so that the control valve 17a is operated as shown in FIG. It opens and closes according to the intermittent button shown in (I). Then, the steam load demand in the first Sterilizer 1 which is operated intermittently according to this intermittent pattern is as shown in FIG. 2(G).

During this time, the flip-flop 38 is set to receive and recycle the control signal Sl, and is reset at the time when the fifth monostable multivibrator 36 returns to the stable state (FIG. 2(H)), so that each flip-flop The positive phase output signal of is supplied to the load state signal terminal 40 via the buffer amplifier 39 as a load state signal S2 representing a state in which a steam load demand is occurring in this Sterilizer.

Furthermore, the sixth monostable multivibrator 37
When the monostable multivibrator 35 returns to the stable time, the fifth monostable multivibrator 36 transitions to the stable state, that is, the control valve l
Beyond the point in time when ea is closed, the valve is continuously closed and remains in a stable state for a quasi-stable time t6 to define a pressure holding state period in which the sterizer l is kept in a pressure holding state, and its positive phase remains constant. The output signal is supplied as a holding pressure state signal S3 to a holding pressure state signal terminal 42 via a buffer amplifier 41,
Sterilyzer l by lighting up an indicator light (not shown), etc.
This will make it easier to transport the materials to be processed.

After that, a working time is set for carrying in and out the material to be processed into the Stellizer L, and in the case of the example, 100 minutes
The steaming work step of the cycle is completed.

On the other hand, a control signal S1 is transmitted to each of the four Sterilyzer control devices 2117 provided in each Sterilyzer l, for example, the second, third, and fourth Sterilyzers.
If supplied sequentially and alternatively with a phase time of 25 minutes, each sterizer l will have a phase time of 25 minutes.
The same intermittent pattern shifted by minutes (Fig. 2 (K) (M) (
0) ), and the load status signals 5) S2 at each Steririser 1 at that time are similarly shifted by 25 minutes ((J), (L), and (N) in FIG. 2). Regarding the total steam load demand of the four Sterilyzers that are operated intermittently according to the 25-minute pattern, the fluctuation over time is evened out due to the difference in the intermittent operation of each Sterilyzer. (FIG. 2(P)), load protrusion is avoided.

<Problems to be Solved by the Invention> However, as is clear from the operation example shown in FIG. 4, which corresponds to FIG. When this happens, the leveling effect of load fluctuations based on intermittent operation in each Steririser becomes inefficient, resulting in a noticeable jump in the total steam load demand, as shown in Figure 4 (P). There is.

In other words, during one cycle of the iris heat work process in each Sterilyzer l, the work time for carrying in and out of each Sterilyzer is dominated by the efficiency of manual labor. The working time of the cycle, in other words, the actual start point of the control button in each Sterilyzer (hereinafter referred to as the execution start point) is delayed due to the delay in the loading/unloading process mentioned above. Since the leveling effect of the load protrusion is impaired, a significant load protrusion appears as shown in FIG. 4(P).

Such an increase in the total steam load demand has led to an increase in the capacity of the boiler for supplying steam to the sterilizer and a more complex and sophisticated fuel control, which has resulted in an increase in equipment costs.

Means for Solving the Problems In view of the problems of the boiler capacity increasing and the fuel control becoming more complex and sophisticated in the above-mentioned conventional technology, the present invention solves the problems of the Steririser under load among the plurality of Steririsers. When it is determined that the number of units is greater than the set value, the supply of a new control signal to the Sterilyzer is stopped (3JI rL), and the configuration is configured so that another Sterilyzer does not newly enter the continuous operation state, thereby solving the problem described above. Even if one cycle of the steaming work process in the Sterilyzer is delayed in various ways due to delays in manual work by one person, there will be no spike in the total steam load demand. It is an object of the present invention to provide a sterilizer control device that can be driven by steam using a small boiler and simple fuel control.

Therefore, the configuration of the present invention is such that a control signal is sent from the control signal generation means to each start signal generation means for each Steririser in accordance with a predetermined order at the planned start time every lapse of a predetermined phase time. When supplied, each starting signal generating means:
In response to the simultaneous supply of the control signal supplied at that time and the *a completion signal issued when the ready state of each Sterilyzer is confirmed, a start signal is sent to each Sterilyzer at the start of execution. The steam is supplied to the steam control means, and each steam supply control means that receives the steam starts intermittent operation of the Rasterizer according to a predetermined intermittent pattern.Meanwhile, during this time, the load state determining means for each Rasterizer determines the load state. , outputs a load status signal for each Steririser, and based on these load status signals, the overload status determining means determines that the number of Steririsers in the loaded status exceeds a predetermined value, and outputs an overload status signal. and generates a control signal in response to this overload state signal +1111): The means prevents the control value generating means from generating a new control signal, thereby reducing the number of Sterilyzers that are in the load state at the same time. By limiting the steam load to a predetermined value or less, the total steam load demand of a plurality of Sterilizers is avoided from increasing.

<Embodiment> In FIG. 5 showing the configuration of a Sterilyzer control device which is an embodiment of the present invention, first to fourth Sterilyzer l-
Steam supply pipe 16b extending to 1, 1-2, 1-3, 1-4
-1, IEib-2, 18b-3, 18b-4,
A valve control circuit 30' as shown in FIG. 6 is included.

That is, one input terminal of the AND gate 41a is connected to the output terminal of the OR gate 41, and the other input terminal of the gate 41a is connected to the positive phase output terminal of the flip-flop 38.

Further, a delay circuit 38a is inserted between the start signal terminal 31 and the set terminal of the flip-flop 38, and its input terminal is connected to the
and extends to a second reset terminal of flip-flop 38. The other components are the same as those indicated by the same reference numerals in FIG.

In the valve control circuit 30', there are first to sixth monostable multi-habilators 32 to 37. The OR gate 41, the input gate 141a, the input gate 38b and the buffer amplifier 42 constitute the thin air supply control means 17A, while in each circuit 30', the free 2-flop 38, the delay circuit 38a
, and the buffer amplifier 39 constitute the load state determining means 17B.

Each starting signal terminal 31-1.31-2.32-3.31 of the air supply control device 17-1.17-2.17-3.17-4 including such a valve control circuit 30' −
4 includes a Nantes gate l 1 as a starting signal generating means.
The output terminals of 8-1.18-2.18-3.18-4 are connected.

One input terminal of each NAND game) 18-1, ~18-4 is connected to the opening/closing operation of the lids of Sterilyzer l-1, ~l-4, or by visual inspection to prepare for steaming treatment in Sterilyzer. A switch 19 that outputs a ready signal S4 in response to a manual operation by an operator who has confirmed the completion state.
-1.19-2.19-3.19-4, respectively, and the other input terminal f of the Nant gate is connected to each control value of the programmer pull sea fence controller 20 as a control signal generating means. ) terminals respectively.

Furthermore, each display signal terminal of this sea fence controller 20 has indicator lights 31-1 and 21- for guiding the carrying-in operation.
Connected to 2.21-3.21-4.

On the other hand, terminals 40-1.40-2.40-3.40-4 that transmit each load state of each steam supply control device 17-1-17-4
are the constant commercial switching elements 22-1 and 22-, respectively.
2.22-3.1 connected to each control terminal of 22-4, one end of the element is connected to a power supply, the other end is connected in common to the inverting input terminal of an operational amplifier 23 as a comparator,
Furthermore, via this, the non-inverting input of the amplifier, which is grounded via a resistor 24, extends to the connection point of a series-connected resistor 25, 26 formed in the bleeder.

Furthermore, the output terminal of the operational amplifier 23 is connected to the gate circuit 2 in the programmerful sea fence controller 20.
8 control terminals.

The constant current switching elements 22-1 to 22-4° operational amplifier 23. Resistor 24.25.2B constitutes overload condition determination means 29.

The operation of this configuration will be described below with reference to FIG. 7, which corresponds to FIG. 4.

In response to a clock pulse provided by the clock oscillator 27 through the gate circuit 28 in the open state, the Flora Maple Sea Fence Controller 200 starts walking, for example, in FIG.
"l" as the control signal S1 is supplied from the control signal terminal of the controller 20 to one input terminal of the Nant Kate 18-2 related to the second Sterilyzer 1-2. If the carrying-in work at 18-2 is completed and the switch 19-2 is operated, "1" as the ready signal S4 is supplied to the other input terminal of the NAND game 18-2. Therefore, the Nantes gate receives input signals simultaneously to the two input terminals, and sends the start signal S5, which is inverted from rlJ to "0" at the scheduled time of 25 minutes in FIG. 6, to the steam supply control devices 17-2. supply to.

Then, the first to sixth monostable multivibrators 32 to 37 in the valve control circuit 30' operate in the same manner as the conventional device in response to the inversion of the starting signal S5 to "0", and the OR gate 41 and the buffer In cooperation with the amplifier 42, the control valve 17a in the steam supply pipe 113b is turned on and off according to a predetermined on and off pattern, and the second Sterilizer 1-2 is operated intermittently (
Figure 6 (K)).

At this time, the inversion of the start signal S5 to rQJ is slightly delayed by the delay circuit 38a, and is transmitted to the set terminal of the flip-flop 38, which is set.
The inverted "0" of the starting signal S5 is inverted to rlJ by the inverter 38b, and this is supplied to the second reset terminal of the flip-flop 70 tube in advance, so that there is no problem in operation, and the flip-flop During the load state period in which the flip-flop 38 is set, the positive phase output signal rlJ of the flip-flop is supplied to one input terminal of the AND gate 41a, and the output signal of the gate 1-41a is the OR gate) 41 The presence of the gate 41a does not have any adverse effect on the operation under load conditions.

Thus, the flip-flop 38 outputs the load status signal S2, which changes to "1" during the period in which the Sterilizer 1-2 is in the loaded status, via the buffer amplifier path 38 to the load status signal terminal 40-2 ( 6(J)), this is supplied to the constant current switch element 22-2 and keeps only the element 22-2 in the operating state, so that one unit of constant current passes through the resistor 24 and across it. , the resulting one unit constant voltage is supplied to the inverting input terminal of the operational amplifier 23 as an input signal.

At this time, if the resistance values of the resistors 25 and 26 are appropriately selected and a constant voltage of 3 units is applied as a reference voltage to the non-inverting input terminal of the operational amplifier 23, the input signal of the operational amplifier 23 becomes Since the amplifier 23 supplies "l" to the control terminal of the gate circuit 28, the circuit 28 remains open and the clock pulse from the clock oscillator 27 passes through it. In response to the programmable sea fence controller 20
Progress continues.

During this time, a display signal S8 is sent from the display signal terminal of the controller 20 to the indicator light 21-3 of the third Sterilyzer 1-3, and the indicator light lights up, indicating that the next operation should be performed. It is displayed that it is the third Sterilyzer 13, which facilitates the carrying-in work.

The programmable Sea Fence Controller 20 to third Sterilyzer 1-3 (Nando game) +8-3
``1'' of the control signal Sl' is supplied to one input terminal of the switch 19-3, but for example, there has been a delay in the carrying-in operation, and by this point the ready signal S4 has not been set to ``1'' from the switch 19-3.
is not supplied to the other input terminal of the Nantes gate 1B-3, the start signal S5 is supplied from the gate 18-3 to the start signal terminal 31-3 of the steam supply control device 17-3. This is not carried out and is kept at rlJ, with the start of operation of the Sterilizer 1-3 being withheld.
? Waiting for the arrival of "1" as the F8 ready signal S4,
This has arrived.

Sometimes, for the first time, the output signal of the game) 18-3 becomes "0".
'', the start signal S5 is issued, thereby ensuring the start of operation of the third Sterilyzer 13 from the start of execution (FIG. 6 CM). In the middle, a failure that starts at the planned start time of 50 minutes starts later than the execution start time of 75 minutes. The third Sterilyzer 1- which started operation with a delay in this way
The load status signal S2 related to No. 3 is delayed by the delay in the start of operation, and reaches rlJ at the start of execution for 75 minutes in FIG.
(Fig. 6 (L)), the constant current switch element 22
-3 is kept in the operating state, but at this point, the load status signal S2 related to the second Steririser 1-2 has already changed to "0" (Fig. 6 (J)), and it is also in the operating state. Since there is only one constant current switching element, the operational amplifier 23 receives one unit of constant voltage as an input signal.

"1" is output, and the step in the programmable sea fence controller 20 continues. Subsequently, the controller 20 controls the indicator light 21 related to the fourth Sterilizer 1-4.
After sending the display signal S6 to -4 and lighting it up, the 6th
In the figure, at the start of the plan of 75 minutes, which is delayed by one phase time, the control signal Sl "1" is supplied to the control signal Sl of the third Sterilizer 1-3. Due to the delay in the delivery work, the 4th
The loading work at Sterilyzer 1-4 has also been delayed, and at this point, the readiness signal S4 from switch 19-4 has been delayed.
If "1" is not supplied as "1" and "l" of the signal S4 is supplied at the time of 80 minutes in FIG. (Fig. 6 (0)), and its load state j main signal S2 is also
It is delayed until this point and changes to rlJ (Fig. 6 (N))
, and, as is clear from the comparison between FIGS. 6(L) and (N), the supply period of the load state signal S2 related to this fourth Sterilizer 1-4 to the constant current switch element 22-4,
Since the supply period of the load-like 1-channel signal S2 related to the third Steririser 1-3 to the constant current element 22-3 overlaps, the period of supply of the load-like 1-channel signal S2 to the constant current switch element 22-3 regarding the third Steririser 1-3 overlaps. .22-4 are activated simultaneously, and a constant voltage of 2 units is supplied to the operational amplifier 23 as an input signal, but even so, the constant voltage of 3 units as a reference voltage is not reached. The operational amplifier 23 still outputs "1" and the step in the programmable sea fence controller 20 continues.

Subsequently, in order to start the steaming operation of the next cycle of the first Sterilizer l-1, after sending the display signal S6 to the indicator light 21-4 in advance, the programmable sea fence controller 20 controls the phase shift as shown in FIG. At the time when the plan starts at 0 minutes, which is delayed by the time, the control signal Sl is applied to one input terminal of the Nant gate 18-1 related to the first SteriLyzer 1-l.
1'' is supplied, and at this point, if rlJ of the ready signal S4 is supplied to the other input terminal of the Nantes gate, the steam supply control device 17-1 is supplied from the output terminal of the gate 18-1. Since the start signal S5 for switching to rOJ is once supplied to the start signal terminal 31-1 of is the steam supply control device 17
-1 is supplied from the load-like yE signal end 40-1 to the constant current switch element 22-1 to put it into an operating state.

Then, as is clear from the comparison of FIG. 6(H), (L), and (N), at this point, the third and fourth Sterilizers 1-3.1-4 have already remained in the loaded state. Therefore, when the first Sterilyzer 1-1 shifts to the loaded state, the three Sterilyzers simultaneously enter the loaded state, and the first, third, and fourth Sterilyzers 1-1, 1
-3.1-4 Steam supply control device 17-1.17-3.
Since the three constant current switching elements 22-1, 22-3, and 22-4 are activated in response to the load status signal S2 from 17-4, instantaneous interaction occurs during the activation period. , three units of constant voltage are supplied to the differential amplifier 23 as an input signal. Then, since this human power source reaches the reference voltage selected for the constant voltage of 3 units, the output signal of the amplifier 23 changes to rOJ representing the overload condition signal S7, which is applied to its control terminal. In response to this, the gate circuit 28 counts clock pulses and controls the steam supply control device 17-1 for the first Sterilizer 1-1 until the start of the next plan for the second Sterilizer 1-2. By blocking the supply of rlJ as the control signal St,
It operates so that it remains at 0. Therefore, at the point when the output signal of the operational amplifier 23 changes to rOJ, the starting signal S5 from the gate 1B-1 of the gate 18 also disappears and "l
'', the input signal 38b in the valve control circuit 30' shown in FIG.
is supplied with rlJ, where it is inverted and obtained “0
” is supplied to the second reset terminal of the flip-flop 38 to reset the flip-flop 38 and keep it in the /1 state until rOJ, which is the next starting signal S1, arrives at the starting signal terminal 31. to long.

While the flip-flop 38 is locked in the reset state, the positive phase output signal of the flip-flop remains at "0", and this rOJ is also supplied to one input terminal of the AND gate 41a, and the output signal from the OR gate 41 is '1
'' is blocked here, so the control valve 17a is never opened regardless of the operation of the first to fifth monostable multivibrators 32 to 36.

Therefore, in such a case, as shown in FIG. 7 (1), at the plan start time of 0 minutes, the first Sterilyzer 11 does not start operation and is left as it is, and after the phase time has elapsed, the next Sterilizer 11 is started. At the start of the 25-minute plan, the second Sterilyzer 1-2 is given an opportunity to start operation. As a result, at this point, the third. Fourth Sterilizer 1-3
, 1-4 will remain in the loaded state at the same time, and in that case, the total steam load demand supplied to the Steririser from the boiler 1B as a steam supply means is as shown in Fig. 6 (P
).

- In the embodiment described in (1), the load status signal obtained from the first stage of the load status 78 determination in the steam supply control device for each Sterilyzer (constant current switch element that becomes activated in response to each of S2) , refer to the voltage of the input value t-) based on the constant current determined by the number of constant current switch elements in the operating state. Overload condition with operational amplifier comparing W voltage! f4
Although this constitutes another means, it is not limited to this, and it is sufficient to count and manage the number of load status signals generated.
It is optional to adopt a configuration in which a microprocessor is used to read the status of each load status signal at each time and count and manage the number of occurrences of the signal, and such a configuration is also expressed in this specification. It is included in the overload state determination means.

Effects> As described above, according to the present invention, it is determined for each Sterilyzer that a plurality of Sterilyzers are in a loaded state, and each load state '! Based on the E signal, the overload condition determining means determines that there is an overload condition '8E, that is, a load condition! When it is determined that the number of Sterilyzers in the system is greater than or equal to a predetermined value, the control signal blocking means blocks generation of a new control signal and prevents new Sterilyzers from starting operation. , as was the case, when the execution start time of each Sterilyzer was delayed due to delays in manual labor such as loading and unloading work included in one cycle of steaming work in the Sterilyzer. , as shown in Fig. 4 (P), there is no protrusion in the total steam load demand of multiple Sterilyzers, and there is a difference in the start of execution of each Sterilyzer, and each Even if the leveling effect of the steam load demand in the Sterilyzer is impaired, the number of Sterilyzers that reach the loaded state at the same time is limited to a predetermined number or less, so as shown in FIG. 7(P), An excellent effect is achieved in that the total steam load demand is avoided, and the steam to each Sterilizer can be provided by a small-capacity boiler and a simple combustion control device.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram showing the configuration of a palm oil mill including a Sterilyzer control device, which is the object of the present invention. 2 to 4 relate to the prior art, and FIG. 2 shows the main waveforms (A) to (A) of the steam supply control means 17A.
F) and the intermittent slams of the four Sterilyzers (I) (K)
(L) (N), the load state period (H) (J) (L) (N) of the four Sterilyzers, and the steam load demand (G) corresponding to the intermittent slam (1) of the first Sterilyzer. and 4
3 is a block diagram showing the configuration of the valve control circuit 30 in the steam supply control device 17 for each Sterilyzer, and FIG. 4 is a time chart showing the total steam load reception (P) in each Sterilyzer. is a time chart corresponding to FIG. 2 when the execution start time of each Sterilyzer is delayed. 5 to 7 relate to one embodiment of the present invention, FIG. 5 is a block diagram showing the configuration of the main part, and FIG. 6 is a valve control circuit in the steam supply control device 17 for each Sterilyzer. 7 is a time chart corresponding to FIG. 4. 1-11 Sterilizer IEi---Boiler (steam supply means) 1? ---One steam supply control device +7A ---One steam supply control means 17B ---One load state determination means +8 --- Nantes gate (starting signal generation means) 19
--- Transient switch 20 --- 7' Grammable sea fence controller (control signal generation means) 28 --- Gate circuit (control signal generation prevention means) 29
--- Patent applicant for overload state determination means Ebara Corporation = r = Itouri Neichi j-E f material 1981 81
1271.1 Mr. Michibe Uga, Commissioner of the Japan Patent Office, 1. Indication of Patent Application No. 60-162509 2, Title of Invention: Sterilyzer Control Device in Palm Oil Mill 3, Supplementary 1F Person Who Operates 1 List. Relationship Patent applicant address: Tokyo Metropolitan University [11-1-4, Haneda Asahi-cho, H-ku, Agent]

Claims (1)

[Scope of Claims] A plurality of Sterilyzers 1 for heating objects to be processed with steam; a steam supply means 16 for supplying steam to the Sterilyzers 1; and a steam supplying means that starts a control operation in response to a start signal S5. Steam supply control means 17 for controlling the supply of steam from 16 to each Sterilizer 1 intermittently according to a specific intermittent pattern
In the Sterilyzer control device having the following, in response to the simultaneous supply of the ready signal S4 and the control signal S1, which are issued when the ready state of each Sterilyzer 1 is confirmed, the starting signal S5 is used to control the steam supply. Means 17A
a control signal generating means 20 that distributes and supplies a control signal S1 to each starting signal generating means 18 in accordance with a predetermined order every time a preset phase time elapses; A load state determining means 17B that determines the load state of the Sterilyzer 1 and outputs a load state signal S2, and each Sterilyzer 1 in a loaded state based on the load state signal S2 from each load state determining means 17B.
an overload state determining means 29 that determines that the number of vehicles exceeds a preset upper limit number and outputs an overload state signal S7; and a control signal generating means 20 in response to the overload state signal S7.
A control signal generation prevention means 28 for preventing the output of a new control signal S1 from a sterilizer control device.