JP2010230185A - Crane control device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To uniform properties of burned objects when inputting the burned objects to an incinerator by a crane, in a crane control device adapted to the incinerator for burning selection residue and dehydration residue etc. generated from a methane gasification facility as the burned objects. <P>SOLUTION: The crane control device includes a pit 2, the crane 3, a selector detection means 4, a dehydrator detection means 5 and a control means 6. In particular, the selector detection means 4 detects the operating state of a selector 51, the dehydrator detection means 5 detects the operating state of a dehydrator 52, and the control means 6 calculates the mixing ratio R of the selection residue B and dehydration residue C based on each operating state from the both detection means 4, 5 and stirs and mixes the selection residue B and dehydration residue C in the pit 2 by controlling the crane 3 based on the mixing ratio R. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention is applied to an incinerator that incinerates, for example, sorting residue or dehydrated residue generated from a methane gasification facility as an incinerator, and a crane for making the properties uniform when the incinerator is charged into the incinerator by a crane. It is related with improvement of a control device.

In the case of the pit-and-crane method, the incinerator is typified by the incinerator represented by the waste incinerator, but the incinerator can be made uniform in order to stabilize the operation of the incinerator. It was important.
In the case of incinerated materials such as garbage, the properties vary, and in order to make them uniform, they were handled by stirring and mixing in the pits. Stirring / mixing is performed depending on the operation of the crane, but the control is performed based on the state of the incinerated material in the pit including the pit storage height of the incinerated material (see Patent Documents 1 and 2). ).

On the other hand, in the facility (incinerator) that incinerates the residue generated from the methane gasification facility, the type of the residue was discharged from the remaining sorted residue or methane gasification facility selected as the supply suitable for the methane gasification facility While there are a plurality of dehydrated residues obtained by dehydrating the residue, the properties such as the calorific value are greatly different.
For this reason, as in the case where the incinerated material is garbage, the properties of the incinerated material cannot be made uniform only by the stirring and mixing of the crane using the pit storage height as an index.
Therefore, in order to compensate for this, conventionally, for example, a crane is used to measure the weights of the sorting residue and the dewatering residue, and the crane operator grasps the weight before stirring and mixing. It was.

JP-A-9-178141 JP 2002-295821 A

  As described above, in the conventional one, the properties of the incinerated material supplied to the incinerator cannot be made uniform unless the crane is manually operated.

  The present invention was devised in view of the above-mentioned problems, and was devised in order to solve this problem. The problem to be solved is that of the incinerated material supplied to the incinerator while minimizing the manual operation of the crane. The object of the present invention is to provide a crane control device that can make the properties uniform.

  The crane control device according to the present invention includes a pit for storing the sorting residue from the sorter and the dewatering residue from the dehydrator, and stirring and mixing the sorting residue and the dewatering residue from the pit to make an incinerated product, and incinerate the incinerated product. A crane to be put into the furnace, a detector for the sorter for detecting the operating state of the sorter, a detecting means for the dehydrator for detecting the operating state of the dehydrator, and a sorting residue depending on each operating state from both detecting means. It is characterized by comprising a control means for agitating and mixing the pit sorting residue and the dewatering residue by calculating the mixing ratio of the dewatering residue and controlling the crane based on this.

  The sorting residue from the sorter and the dewatering residue from the dehydrator are supplied to the pit and stored. The operation state of the sorter is detected by the detection unit for the sorter, and the operation state of the dehydrator is detected by the detection unit for the dehydrator. In the control means, the mixing ratio of the sorting residue and the dewatering residue is calculated according to the operating states from both detection means. Then, the crane is controlled based on this mixing ratio, so that the pit sorting residue and the dewatering residue are stirred and mixed, and the stirred and mixed incinerated product is put into the incinerator.

  The control means preferably includes correction means for correcting the mixing ratio of the sorted residue and the dehydrated residue based on the property data of the sorted residue and the dehydrated residue. In this way, the mixing accuracy of the sorting residue and the dehydrated residue is greatly improved, and the properties of the incinerated product can be made more uniform.

According to the present invention, the following excellent effects can be achieved.
(1) A pit, a crane, a sorter detection means, a dehydrator detection means, and a control means, and in particular, a sorter detection means for detecting the operation state of the sorter, and an operation state of the dehydrator. Based on the detection means for the dehydrator and the operating conditions from both detection means, the mixing ratio of the sorted residue and the dehydrated residue is calculated, and the crane is controlled based on this to control the pit sorted residue and the dehydrated residue. The control means for mixing is provided, so that the characteristics of the incinerators in the pits can be made uniform by minimizing the manual operation of the crane for incinerators with different properties such as sorting residue and dewatering residue from the methane gasification facility. I can do it.
(2) Since the properties of the pit incinerator are uniform, the operation in the incinerator can be stabilized.

The schematic diagram showing the crane control device concerning the present invention. The graph which shows the example of a relationship between the operation time of a sorter, and an operation load. The graph which shows the example of a relationship between the operation time of a dehydrator and an operation load. The top view of the pit which shows the point of the mixing and storage of a sorting residue and a dewatering residue.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a schematic diagram showing a crane control device according to the present invention. FIG. 2 is a graph showing an example of the relationship between the operation time of the sorter and the operation load. FIG. 3 is a graph showing an example of the relationship between the operating time of the dehydrator and the operating load. FIG. 4 is a plan view of a pit showing a procedure for mixing and storing the sorting residue and the dewatering residue.

  The crane control device 1 is composed of a pit 2, a crane 3, a sorter detection means 4, a dehydrator detection means 5, and a control means 6, and the main part thereof is provided in a methane gasification facility 50 equipped with an incineration facility. Applied.

  The methane gasification facility 50 is for subjecting the feed A to methane fermentation, a sorter 51 that sorts the feed A and supplies only the appropriate one to the methane gasification facility 50, and the residue discharged from the methane gasification facility 50. The dewatering machine 52 for dewatering, the pit 2 for storing the sorting residue B from the sorting machine 51 and the dewatering residue C from the dewatering machine 52, the sorting residue B and the dewatering residue C in the pit 2 are agitated and mixed, and incinerated. And a crane 3 for charging the incinerated product D into the incinerator 53 and an incinerator 53 for incinerating the incinerated product D from the crane 3.

  The crane 3 includes a bucket 7 that can hold the sorting residue B, the dewatered residue C, and the incinerated material D, and driving means 8 for moving the bucket 7 to an arbitrary position in the pit 2.

  The sorter detection means 4 detects the operation state (run / stop, run time, run load, etc.) of the sorter 51.

  Similar to the sorter 51, the dehydrator detection means 5 detects the operation state (operation / stop, operation time, operation load, etc.) of the dehydrator 52.

  The control means 6 calculates the mixing ratio R of the sorting residue B and the dewatering residue C according to the respective operating states from the sorting machine detection means 4 and the dehydrator detection means 5 and controls the crane 3 based on this. Therefore, the sorting residue B and the dewatering residue C in the pit 2 are stirred and mixed.

  The control unit 6 includes a correcting unit 9 that corrects the mixing ratio R of the sorted residue B and the dehydrated residue C based on the property data (heat generation amount, apparent specific gravity, etc.) of the sorted residue B and the dehydrated residue C.

Next, the operation will be described based on such a configuration.
The supply A to be supplied to the methane gasification facility 50 is sorted by the sorter 51 and only those suitable for methane gasification are supplied to the methane gasification facility 50. The remaining sorting residue B sorted by the sorter 51 is sent to the pit 2 and stored. The residue discharged from the methane gasification facility 50 is dehydrated by the dehydrator 52, and the dehydrated residue C is sent to the pit 2 and stored.
The operation state of the sorter 51 is detected by the sorter detection means 4, and the operation state of the dehydrator 52 is detected by the dehydrator detection means 5.
In the control means 6, the mixing ratio R of the sorting residue B and the dewatering residue C is calculated according to each operation state (operation / stop, operation time, operation load, etc.) from the detection means 4, 5, and the correction means 9. The mixing ratio R is corrected based on the property data (the amount of heat generated, the apparent specific gravity, etc.) of the sorting residue B and the dewatering residue C from.
Based on the mixing ratio R obtained in this way, the crane 3 is controlled by the control means 6 so that the sorting residue B and the dewatering residue C in the pit 2 are stirred and mixed, and the stirred and mixed incineration product. D is put into the incinerator 53.

In other words, the operating states of the sorter 51 and the dehydrator 52 are taken out as state signals by the sorter detection means 4 and the dehydrator detection means 5, and this is sent to the control means 6 for stirring, mixing and charging of the crane 2. It is input as a variable for operation control.
By recognizing each operation state of the sorter 51 and the dehydrator 52, it becomes possible to always grasp the state of the pit 2 from the change of each amount of the sorting residue B and the dewatering residue C supplied to the pit 2. Furthermore, by inputting the property data (calorific value, apparent specific gravity, etc.) of the sorting residue B and the dewatering residue C into the control means 6 and calculating, the optimum mixing ratio R of the sorting residue B and the dewatering residue C is obtained. Stirring / mixing of the pits 2 necessary for obtaining the uniformity of the incinerated material D, and controlling the loading of the crane 3 after grasping the properties of the incinerated material D from the agitated / mixed state can be performed.
As a result, it is possible to operate the crane 3 with no or minimal human operation. Also, the operation state of the incinerator 53 can be continued and stabilized accordingly.

Hereinafter, specific examples thereof will be described.
Table 1 shows typical physical property values of garbage (incinerator) waste and methane gasification facility residue (sorting residue, dehydrated residue).

As shown in Table 1, the properties of the sorting residue B and the dewatering residue C of the methane gasification facility 50 are greatly different from those of ordinary waste incinerated by the incinerator 53.
For this reason, it is not suitable to incinerate the sorting residue B or the dewatering residue C alone because it causes abnormal combustion or insufficient combustion in the incinerator 53. This is because there is a risk that burning of the incinerator 53, generation of clinker, and abnormal generation of dioxins may be caused by abnormal combustion or defective combustion.
Therefore, in order to stabilize the operation of the incinerator 53, it is very important how to properly mix the sorting residue B and the dewatering residue C to maintain the properties suitable for incineration similar to general waste. .

2 and 3 show an example of the relationship between the operation time and the operation load as an example of the operation state of the sorter 51 and the dehydrator 52.
The operation state of the sorter 51 is determined depending on the supply amount of the feed A, and the operation state of the dehydrator 52 is determined depending on the operation state of the methane gasification facility 50. Similarly, there is no correlation between the operation states of the sorter 51 and the dehydrator 52.
Accordingly, the amount of each of the sorting residue B and the dewatering residue C supplied to the pit 2 also varies with time regardless of the individual amount.

Here, the operation loads of the sorter 51 and the dehydrator 52 in the unit time t ₁ handled by the control means 6 of the crane 3 are totaled, and the amounts are defined as Q _S1 and Q _D1 , respectively. Assuming that H _B is the optimum lower heating value for the incinerated product D to be incinerated in the incinerator 53, the optimum mixing ratio R for stirring and mixing the dehydrated residue Q _D1 into the selected residue Q _S1 is expressed by the following equation (1). Desired.

H _B = (H _S × Q _S1 + R × α × H _D × Q _D1 ) / (Q _S1 + Q _D1 ) (1)

H _S = representative value of lower calorific value of selected residue H _D = representative value of lower calorific value of dehydrated residue α = correction coefficient of dehydrated residue

By inputting a correction value (correction coefficient) that reflects a change in state such as the water content of the dehydrated residue in α, an optimal mixing ratio R is obtained.

Further, depending on the operating state of the dehydrator 52, like the t ₂ h 3, operating load 0, or even extremely low case occurs. In that case, since a stirring / mixing state suitable for combustion in the incinerator 53 cannot be obtained, the residue of the sorting machine 51 temporarily remaining in the pit 2 is stored, and the operation load of the dehydrator 52 is increased. In the increased stage (after the elapse of t ₃ hours), the mixing ratio R for stirring and mixing the stored sorting residue and dewatering residue is obtained from the above formula (1), and stirring and mixing are performed in the incinerator 53. Get a state suitable for incineration.

Using the obtained mixing ratio R, the actual storage and stirring / mixing method of the pit 2 is performed as follows.
First, as shown in FIG. 4, the sorting residue B from the sorter 51 and the dewatering residue C from the dehydrator 52 are supplied to the pit 2.

The supplied dehydration residue C is transferred to the sorting residue B by the crane 3 by the required amount R · Q _D for stirring and mixing obtained from the obtained mixing ratio R, and stirred and mixed with the sorting residue B. After that, it is temporarily stored in the storage area of the pit 2 as an incinerator D suitable for being put into the incinerator 53. Here, Q _D is the supply amount of the dewatering residue C from the dehydrator 52 to the pit 2.
The incinerator 53 is supplied with only the incinerated material D that has been appropriately stirred and mixed and temporarily stored, so that it is possible to continue a stable operation state.
By moving the required amount R · Q _D of the dewatering residue C by the crane 3 according to this method, the sorting residue B can be stirred and mixed.
Conventionally, for example, the crane 3 was used to measure the weights of the sorting residue B and the dewatering residue C, and the crane operator grasped the work to stir and mix, but the work process became unnecessary, The equipment cost of the crane 3 can be reduced and the power consumption can be reduced by reducing the operation process.

In addition, although the crane control apparatus 1 was applied to the methane gasification facility 50 in the previous example, it is not limited thereto, and may be applied to other facilities, for example.
In the previous example, the control means 6 was provided with the correction means 9, but it is not limited to this. For example, this may be omitted.
In the previous example, the control means 6 temporarily stores the incinerated material D obtained by stirring and mixing the sorting residue B and the dewatering residue C in a part of the pit 2. You may make it throw the mixed thing into the incinerator 53 as it is.

  DESCRIPTION OF SYMBOLS 1 ... Crane control apparatus, 2 ... Pit, 3 ... Crane, 4 ... Sorting machine detection means, 5 ... Dehydrator detection means, 6 ... Control means, 7 ... Bucket, 8 ... Drive means, 9 ... Correction means, 50 ... methane gasification facility, 51 ... sorter, 52 ... dehydrator, 53 ... incinerator, A ... feed, B ... sorter residue, C ... dehydrated residue, D ... incinerator, R ... mixing ratio.

Claims (2)

  A pit that stores the sorting residue from the sorter and the dehydration residue from the dehydrator, a crane that stirs and mixes the pit sorting residue and the dehydration residue into an incinerator, and throws the incinerator into the incinerator, and sorts Sorter detection means for detecting the operation state of the machine, dehydrator detection means for detecting the operation state of the dehydrator, and calculating the mixing ratio of the sorting residue and the dehydration residue according to the operation states from both detection means. A crane control device characterized by comprising control means for stirring and mixing the pit sorting residue and dewatering residue by controlling the crane based on this.   The crane control device according to claim 1, wherein the control means includes a correcting means for correcting a mixing ratio of the sorted residue and the dehydrated residue based on property data of the sorted residue and the dehydrated residue.

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