JP2000018569A - Fuel supply quantity controller and cement production equipment utilizing the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fuel supply quantity controller which enables controlling of the supply quantity of a fuel in a real time corresponding to changes in the composition of the fuel. SOLUTION: This production equipment is provided with a kiln 18 wherein material supplied inside is baked by a flame 8 from a burner 18a in the burning of pulverized coal 7 to produce a clinker. In this case, a fuel supply quantity controller 30 is so arranged to comprise a fuel composition analyzer 31 which analyzes the composition of the pulverized coal 7 from a spectrum obtained by spectral analysis of a plasma light emitted from the pulverized coal 7 when the pulverized coal 7 fed to the burner 18a of the kiln 18 is irradiated with a laser light, an arithmetic device 32 which calculates a heating value per unit quantity of the pulverized coal 7 based on the results of the analysis with the fuel composition analyzer 31 to determine the quantity of the pulverized coal 7 to be fed per unit time and a controller 33 which controls a flow control valve 20a so as to regulate the quantity of the pulverized coal 7 to be fed to the burner 18a based on the results of the calculation at the arithmetic device 32.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fuel supply control device and a cement production facility using the same.

[0002]

2. Description of the Related Art FIG. 4 shows a schematic configuration of a conventional cement production facility for producing cement. In FIG. 4, 111 is a crusher, 112 to 114 are raw material hoppers, 115 is a raw material mill, 116 is a blending silo, 117 is a preheater, 118 is a kiln, 119 is a coal mill, 120 is a coal hopper, 121 is a cooler, and 122 is a clinker. Silos, 123 and 124 are hoppers, 125 is a cement mill,
126 is a cement silo and 127 is a packer.

[0003] The crusher 111 is made of limestone 1 as a raw material.
And clay 2 or silica stone 3 can be crushed for easy handling. Raw material hopper 112-114
The raw materials 1 to 3 from the crusher 111 are respectively charged into the inside, and the raw materials 1 to 3 can be respectively fed. Raw material mill 115
The raw materials 1 to 3 supplied from the hoppers 112 to 114 are supplied, and the raw materials 1 to 3 can be ground and mixed. In the blending silo 116, the raw materials 1 to 3 which are pulverized and mixed by the mill 115 are introduced into the inside, and the raw materials 1 to 3 can be stored.

[0004] The preheater 117 includes a kiln 11 described later.
At the same time as discharging the combustion gas 9 sent out from the outside to the outside, the combustion gas 9 preheats the raw materials 1 to 3 from the blending silo 116 from room temperature to a predetermined temperature (normally about 800 ° C.). You can do it. The kiln 118 is connected to the preheater 11.
The raw materials 1 to 3 preheated in Step 7 are supplied to the inside, and the raw materials 1 to 3 can be fired (about 1200 ° C.) by the flame 8 from the burner 118 a to produce the clinker (burned ingot) 4. It has become. The coal mill 119 is charged with coal as fuel therein, and can pulverize the coal to obtain the pulverized coal 7. In the coal hopper 120, the pulverized coal 7 pulverized by the coal mill 119 is introduced, and the pulverized coal 7 can be supplied to the burner 118a of the kiln 118. The cooler 121 gradually cools the clinker 4 from the kiln 118 (about 200 ° C.). The clinker silo 122 has a structure in which the clinker 4 cooled by the cooler 121 is put inside, and the clinker 4 can be stored inside.

[0005] The hopper 123 is provided with the clinker silo 12.
The clinker 4 from 2 is supplied, and the clinker 4 can be fed. Hopper 124
The gypsum 5 is put inside, and the gypsum 5 can be fed. In the cement mill 125, the clinker 4 and the gypsum 5 fed from the hoppers 123 and 124 are put into the inside, and the clinker 4 and the gypsum 5 can be pulverized and mixed to form the cement 6. ing. The cement silo 126 is configured such that the cement 6 produced by the cement mill 125 is put into the inside thereof and the cement 6 can be stored. The packer 127 packs the cement 6 stored in the cement silo 126 by a predetermined amount.

In such a cement production facility, the raw materials 1 to 3 are crushed by a crusher
To the raw material mill 115, pulverized into a powder, mixed and stored in the blending silo 116, and then the raw materials 1 to 3 are preheated at predetermined amounts.
The raw material 1 to 3 is burned by the flame 8 from the burner 118a in the kiln 118 to generate the clinker 4, and the clinker 4 is cooled by the cooler 121 and put into the clinker silo 122. When the clinker 4 is stored at room temperature, the clinker 4 is supplied to the hopper 123, the clinker 4 is supplied from the hopper 123, and the gypsum 5 is supplied from the hopper 124. Cement 6 can be obtained by pulverizing and mixing 5 with a cement mill 125.

[0007] The cement 6 thus obtained is stored in the cement silo 126, packed in a predetermined amount by the packer 127, and shipped.

[0008]

In the above-mentioned cement manufacturing facility, the calorific value of the flame 8 from the burner 118a of the kiln 118 is a very important factor in producing cement 6 of a constant quality. However,
Since the pulverized coal 7 as the fuel of the flame 8 is obtained by pulverizing natural coal, the composition of the pulverized coal 7 varies. Its supply must be constantly adjusted.

For this reason, as shown in FIG. 5, pulverized coal 7 supplied from the coal hopper 120 to the burner 118a of the kiln 118 is sampled sequentially, transported from the site to the test room, and sampled and adjusted. After analyzing the composition by the analysis, the calorific value based on the composition is calculated, and based on the calculation result, the coal hopper 120 sends the kiln 11
The amount of the pulverized coal 7 supplied to the burner 118a of No. 8 is controlled online by the flow control valve 120a.

However, in such an adjustment of the supply amount of the pulverized coal 7, it is not possible to grasp the composition of the pulverized coal 7 which fluctuates in real time. And it was difficult to produce high quality cement 6.

In view of the above, the present invention provides a fuel supply amount control device capable of controlling the fuel supply amount in real time in response to fuel composition fluctuations, and a cement production facility using the same. Aimed at.

[0012]

According to the present invention, there is provided a fuel supply control apparatus for irradiating a fuel with laser light to emit plasma light from the fuel.
A fuel composition analyzer for analyzing the composition of the fuel from a spectrum obtained by dispersing the plasma light, and a calorific value per unit amount of the fuel is calculated based on an analysis result by the fuel composition analyzer. Calculating means for calculating the amount of fuel supplied per unit time, and control means for controlling the amount of fuel supplied based on the calculation result of the calculating means. .

In the above-described fuel supply amount control device, the fuel composition analyzing means irradiates a laser beam toward the fuel, a laser light irradiating means, a plasma light dispersing means for dispersing plasma light from the fuel, It is characterized by comprising a detecting means for detecting the spectrum of the plasma light separated by the spectroscopic means, and an analyzing means for analyzing the composition of the fuel based on the value detected by the detecting means.

In the above-described fuel supply amount control device, the laser light irradiating means oscillates the laser light in a pulsed manner, and the detecting means detects a spectrum in synchronization with the oscillation of the laser light from the laser light irradiating means. It is characterized by the following.

[0015] In order to solve the above-mentioned problems, a cement manufacturing facility according to the present invention comprises a cement provided with a kiln for firing a raw material supplied therein to generate a clinker by a flame from a burner burning fuel. In a manufacturing facility, the fuel supplied to the burner of the kiln is irradiated with laser light to emit plasma light from the fuel, and the composition of the fuel is analyzed from a spectrum obtained by spectrally separating the plasma light. A fuel composition analysis unit, and a calculation unit that calculates a calorific value per unit amount of the fuel based on an analysis result of the fuel composition analysis unit to calculate a supply amount of the fuel per unit time, A fuel supply amount control device comprising: control means for controlling an amount of fuel supplied to the burner based on a calculation result by the calculation means.

In the above cement manufacturing equipment, the fuel composition analyzing means irradiates laser light to the fuel with laser light, plasma light spectral means for spectrally separating plasma light from the fuel, and the spectroscopic means. And a analyzing means for analyzing the composition of the fuel based on a value detected by the detecting means.

In the above-mentioned cement manufacturing equipment, it is preferable that the laser light irradiating means oscillates laser light in a pulsed manner, and the detecting means detects a spectrum in synchronization with the laser light oscillating from the laser light irradiating means. Features.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a fuel supply control device and a cement production facility using the same according to the present invention will be described with reference to FIGS. FIG. 1 is a schematic configuration diagram of the cement production facility, FIG. 2 is a schematic configuration diagram of a fuel supply amount control device, and FIG. 3 is a schematic configuration diagram of a fuel composition analyzer.

In FIG. 1, reference numeral 11 denotes a crusher;
14 is a raw material hopper, 15 is a raw material mill, 16 is a blending silo, 17 is a preheater, 18 is a kiln, 19 is a coal mill, 20 is a coal hopper, 21 is a cooler, 22 is a clinker silo, 23 and 24 are hoppers, 25 is A cement mill, 26 is a cement silo, 27 is a packer, and 30 is a fuel supply amount control device.

The crusher 11 can crush limestone 1, clay 2, silica stone 3 and the like, which are raw materials, so that they can be easily handled. The raw material hoppers 12 to 14 are configured such that the raw materials 1 to 3 from the crusher 11 are charged therein and can feed these raw materials 1 to 3. The raw material mill 15 is charged with the raw materials 1 to 3, which have been fed from the hoppers 12 to 14 by predetermined amounts,
The raw materials 1 to 3 can be ground and mixed. In the blending silo 16, the raw materials 1 to 3 pulverized and mixed by the mill 15 are introduced into the inside, and the raw materials 1 to 3 can be stored.

The preheater 17 discharges a combustion gas 9 sent from a kiln 18 to be described later to the outside, and at the same time, converts the raw materials 1 to 3 from the blending silo 16 from room temperature to a predetermined temperature by the combustion gas 9. (Usually about 800 ° C.). In the kiln 18, the raw materials 1 to 3 preheated by the preheater 17 are supplied to the inside, and the raw materials 1 to 3 are fired by the flame 8 from the burner 18 a (about 1200).
C.) to produce a clinker (burned ingot) 4. The coal mill 19 is charged with coal as fuel therein, and can pulverize the coal to obtain the pulverized coal 7. The coal hopper 20 is configured such that the pulverized coal 7 pulverized by the coal mill 19 is introduced into the inside, and the pulverized coal 7 can be supplied to the burner 18 a of the kiln 18. The cooler 21 gradually cools the clinker 4 from the kiln 18 (about 200 ° C.). The clinker silo 22 has a structure in which the clinker 4 cooled by the cooler 21 is put inside, and the clinker 4 can be stored inside.

The hopper 23 receives the clinker 4 from the clinker silo 22 and can feed the clinker 4. The gypsum 5 is put into the hopper 24, and the gypsum 5 can be fed. The cement mill 25 is provided with the hopper 2
The clinker 4 and the gypsum 5 fed from 3, 24 are put into the inside, and the clinker 4 and the gypsum 5 can be pulverized and mixed to form the cement 6. The cement silo 26 is filled with the cement 6 produced by the cement mill 25, and the cement 6
Can be stored. Packer 27
Is designed to pack the cement 6 stored in the cement silo 26 by a predetermined amount.

On the other hand, the fuel supply control device 30 is shown in FIG.
As shown in FIG. 2, a fuel composition analyzer 31 is connected to a pipe portion between the coal hopper 20 and the burner 18a of the kiln 18, and is a fuel composition analyzer for analyzing the composition of the pulverized coal 7 flowing through the pipe. And a calorific value per unit amount of the pulverized coal 7 based on the analysis result of the fuel composition analyzer 31 so that the calorific value per unit time of the flame 8 is set to a predetermined value. Pulverized coal 7 to burner 18a
A computing device 32 which is a computing means for calculating a feed amount per unit time of the pulverized coal 7 provided in the pipe portion.
Is connected to a flow control valve 20a for controlling the supply amount of the flow control valve 20a.
and a control device 33 which is a control means for controlling a.

Here, the fuel composition analyzer 31 will be described more specifically with reference to FIG. In FIG. 3, reference numeral 31a denotes a laser oscillator, which can oscillate the laser light 101 in a pulsed manner. 31
Reference numeral b denotes a lens which can finely adjust the direction of the laser beam 101 from the laser oscillator 31a. Reference numeral 31c denotes a measurement window, which includes the coal hopper 20 and the kiln 1
The laser beam 101 from the lens 31b is taken into the pipe, and the plasma light 102 generated in the pipe can be sent out. In this embodiment, the laser oscillator 31a, the lens 31b, the measurement window 31c, and the like constitute a laser beam irradiation unit.

In FIG. 3, reference numeral 31d denotes a mirror, and the plasma light 102 transmitted from the measurement window 31c is mirrored.
The direction of travel can be adjusted.
31e is a condenser lens, which can collect the plasma light 102 reflected by the mirror 31d. Reference numeral 31f denotes a spectroscope, which can separate the plasma light 102 condensed by the condensing lens 31e. Such mirror 31d, condenser lens 31
e, the spectroscope 31f and the measurement window 31c, etc.
In the present embodiment, a plasma light spectroscopy unit is configured.

In FIG. 3, reference numeral 31g denotes a CCD camera which is a detection means capable of high-speed gating.
The spectrum of the plasma light 102 separated by f can be detected. 31h is an analyzer which is an analysis means, and other components (Fe, Ca,
(Si, Al, etc.) can be analyzed. Reference numeral 31i denotes a synchronizing line, which oscillates a pulsed laser beam 101 by a laser oscillator 31a and a CCD
The detection by the camera 31g can be synchronized.

In a cement production facility equipped with such a fuel supply control device 30, the cement 6 is produced as follows.

The raw materials 1 to 3 are crushed by a crusher 11, thrown into raw material hoppers 12 to 14, fed to a raw material mill 15, pulverized and mixed, stored once in a blending silo 16, and then stored. The raw materials 1 to 3 are fed by a predetermined amount to the preheater 17 to be preheated, and the raw materials 1 to 3 are fired by the flame 8 from the burner 18 a in the kiln 18 to be clinker 4.
The clinker 4 is cooled by the cooler 21 and put into the clinker silo 22. When the clinker 4 is stored until it reaches room temperature, the clinker 4 is fed to the hopper 23, and the clinker 4 is transferred from the hopper 23 to the clinker 4. And send
The gypsum 5 is fed from the hopper 24, and the clinker 4 and the gypsum 5 are pulverized and mixed by the cement mill 25 to obtain the cement 6.

When manufacturing the cement 6 in this way,
When the fuel composition analyzer 31 of the fuel supply amount controller 30 is operated and the laser light 101 is pulsated from the laser oscillator 31a into the pipe via the lens 31b and the measurement window 31c, the pipe is Plasma light 102 is emitted from the pulverized coal 7 flowing through the inside,
02 denotes a measurement window 31c, a mirror 31d, and a condenser lens 3.
The light enters the spectroscope 31f via 1e and is dispersed, the spectrum is detected by the CCD camera 31g, the composition of the pulverized coal 7 is analyzed by the analyzer 31h, and the analysis result is transmitted to the arithmetic unit 32. You.

The arithmetic unit 32 calculates the calorific value per unit amount of the pulverized coal 7 based on the analysis result from the analysis unit 31h, and then, based on the calculation result, the kiln 18
The amount of pulverized coal 7 supplied to the burner 118a per unit time is calculated so that the heat value per unit time of the flame 8 of the burner 18a becomes a predetermined value, and the calculation result is transmitted to the control device 33. I do.

The control device 33 controls the flow control valve 2 so as to control the amount of pulverized coal 7 supplied to the burner 118a of the kiln 118 based on the calculation result from the arithmetic device 32.
0a is controlled.

Therefore, the flame 8 generated by the burner 18a of the kiln 18 can always maintain a target calorific value without being influenced by the composition fluctuation of the pulverized coal 7.

Therefore, according to the cement production equipment provided with such a fuel supply amount control device 30, it is possible to control the fuel supply amount in real time in response to a change in the composition of the fuel. 6 can be easily manufactured.

[0034]

The fuel supply control apparatus according to the present invention irradiates a laser beam to a fuel to emit plasma light from the fuel, and analyzes the composition of the fuel from a spectrum obtained by spectrally separating the plasma light. A fuel composition analyzing means, and a calculating means for calculating a calorific value per unit amount of the fuel based on an analysis result of the fuel composition analyzing means to calculate a supply amount per unit time of the fuel, Control means for controlling the supply amount of the fuel based on the calculation result of the calculation means, the fuel composition analysis means irradiates the fuel with laser light and emits plasma light from the fuel. Then, the composition of the fuel is analyzed from the spectrum obtained by dispersing the plasma light, and the calculating means calculates the calorific value per unit amount of the fuel based on the analysis result by the fuel composition analyzing means. This After calculating the fuel supply amount per unit time, the control means controls the fuel supply amount based on the calculation result by the arithmetic means, so that even if the fuel composition varies, the fuel Can always be supplied with the desired heat value.

The fuel composition analyzing means irradiates the fuel with a laser beam toward the fuel, a laser light irradiating means, and a plasma light dispersing means for dispersing plasma light from the fuel;
The fuel composition analyzer includes a detector configured to detect a spectrum of plasma light separated by the spectrometer, and an analyzer configured to analyze a composition of the fuel based on a value detected by the detector. Since the laser light irradiating means irradiates the laser light toward the fuel, the plasma light spectral means disperses the plasma light from the fuel, and the analyzing means analyzes the composition of the fuel based on the value detected by the detecting means, Fuel composition analysis can be performed quickly.

Further, the laser light irradiating means oscillates the laser light in a pulsed manner, and the detecting means detects the spectrum in synchronization with the oscillation of the laser light from the laser light irradiating means. , Detection accuracy can be improved.

Further, the cement manufacturing equipment according to the present invention
In a cement manufacturing facility provided with a kiln for firing a raw material supplied therein to generate a clinker by a flame from a burner that burns a fuel, the fuel supplied to the burner of the kiln is irradiated with laser light. Then, the fuel emits plasma light from the fuel, and a fuel composition analyzing means for analyzing the composition of the fuel from a spectrum obtained by dispersing the plasma light, based on an analysis result of the fuel composition analyzing means, Calculating means for calculating a calorific value per unit amount of fuel to calculate a feed amount per unit time of the fuel; and a feed amount of the fuel to the burner based on a calculation result by the calculating means. The fuel supply amount control device comprising a control means for controlling the fuel supply, the fuel composition analysis means irradiates the fuel to be supplied to the burner of the kiln with laser light and irradiates the fuel with a laser beam. Calculates the composition of the fuel from the spectrum obtained by emitting the plasma light and dispersing the plasma light, and the calculating means generates heat per unit amount of the fuel based on the analysis result by the fuel composition analyzing means. After calculating the fuel supply amount per unit time, the control means controls the fuel supply amount to the burner based on the calculation result by the calculation means, so that the fuel composition Even if there is variation, the calorific value of the flame by the burner of the kiln can always be maintained at a target value. As a result, the fuel supply amount can be controlled in real time in response to the fuel composition fluctuation, and high-quality cement can be easily manufactured.

The fuel composition analyzing means irradiates a laser beam toward the fuel; a laser beam irradiating means; a plasma light spectroscopic means for separating plasma light from the fuel;
The fuel composition analyzer includes a detector configured to detect a spectrum of plasma light separated by the spectrometer, and an analyzer configured to analyze a composition of the fuel based on a value detected by the detector. Since the laser light irradiating means irradiates the laser light toward the fuel, the plasma light spectral means disperses the plasma light from the fuel, and the analyzing means analyzes the composition of the fuel based on the value detected by the detecting means, Fuel composition analysis can be performed quickly.

Further, since the laser light irradiating means oscillates the laser light in a pulsed manner and the detecting means detects the spectrum in synchronization with the oscillation of the laser light from the laser light irradiating means, the SN ratio is improved. , Detection accuracy can be improved.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram of an embodiment of a cement production facility according to the present invention.

FIG. 2 is a schematic configuration diagram of an embodiment of a fuel supply amount control device according to the present invention.

FIG. 3 is a schematic configuration diagram of a fuel composition analyzer.

FIG. 4 is a schematic configuration diagram of an example of a conventional cement production facility.

FIG. 5 is an explanatory diagram of a conventional method of adjusting a fuel supply amount.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Limestone 2 Clay 3 Silica 4 Clinker 5 Gypsum 6 Cement 7 Pulverized coal 8 Flame 9 Combustion gas 11 Crusher 12-14 Raw material hopper 15 Raw material mill 16 Blending silo 17 Preheater 18 Kiln 18a Burner 19 Coal mill 20 Coal hopper 20 Coal hopper 20 Cooler 22 Clinker silo 23, 24 Hopper 25 Cement mill 26 Cement silo 27 Packer 30 Fuel supply control device 31 Fuel composition analyzer 31a Laser oscillator 31b Lens 31c Measurement window 31d Mirror 31e Condenser lens 31f Spectroscope 31g CCD camera 31h Analyzer 31i Synchronous line 32 Arithmetic unit 33 Control unit 101 Laser light 102 Plasma light

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Yoshihiro Deguchi 5-717-1, Fukabori-cho, Nagasaki-shi, Nagasaki F-term in the Nagasaki Research Laboratory, Mitsubishi Heavy Industries, Ltd. (Reference) 3K068 FA02 FB01 FC02 FC03 FC06 FD04 FD10 GA05 HA01 4G012 KA02 KA08

Claims (6)

[Claims] 1. A fuel composition analyzing means for irradiating a fuel with laser light to emit plasma light from the fuel, and analyzing the composition of the fuel from a spectrum obtained by spectrally separating the plasma light; A calculating means for calculating a calorific value per unit amount of the fuel based on an analysis result of the analyzing means to calculate a feed amount per unit time of the fuel; and And a control means for controlling the fuel supply amount. 2. The fuel composition analyzing unit irradiates a laser beam toward the fuel, a laser beam irradiating unit, a plasma light dispersing unit that disperses plasma light from the fuel, and a plasma separated by the dispersing unit. 2. The fuel supply amount control device according to claim 1, further comprising: a detection unit configured to detect a spectrum of light; and an analysis unit configured to analyze a composition of the fuel based on a value detected by the detection unit. 3. . 3. The apparatus according to claim 2, wherein said laser light irradiating means oscillates the laser light in a pulsed manner, and said detecting means detects a spectrum in synchronization with the oscillation of the laser light from said laser light irradiating means. 3. The fuel supply amount control device according to 2. 4. A cement manufacturing facility provided with a kiln for burning a raw material supplied therein to generate a clinker by a flame from a burner burning fuel, wherein the fuel supplied to the burner of the kiln is provided. Irradiating a laser beam to the fuel to emit plasma light from the fuel, and analyzing the composition of the fuel from a spectrum obtained by dispersing the plasma light; and a result of analysis by the fuel composition analyzing means. Calculating means for calculating a heat generation amount per unit amount of the fuel based on the fuel amount, and calculating a feed amount per unit time of the fuel; based on a calculation result of the calculating means, the burner of the fuel based on the calculation result. A cement production facility comprising a fuel supply amount control device including a control means for controlling a supply amount to the cement. 5. The fuel composition analyzing unit irradiates a laser beam to the fuel, a laser beam irradiating unit, a plasma light dispersing unit for dispersing plasma light from the fuel, and a plasma dispersing by the dispersing unit. The cement manufacturing equipment according to claim 4, further comprising: a detecting unit that detects a spectrum of light; and an analyzing unit that analyzes a composition of the fuel based on a value detected by the detecting unit. 6. The laser beam irradiating means oscillates laser light in a pulsed manner, and the detecting means detects a spectrum in synchronization with the oscillation of the laser light from the laser light irradiating means. 6. The cement production facility according to 5.