JP5295343B2 - Method and apparatus for monitoring and controlling furnace pressure of combustor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a monitoring control method and device capable of monitoring an internal pressure in a combustion furnace of a combustor. <P>SOLUTION: A monitoring control device includes a pressure detecting member 2 mounted to s combustion furnace 11 to detect a furnace internal pressure of the combustion furnace 11; a temperature detecting member 3 mounted to an exhaust gas pipe 12 to detect a pipe internal temperature of the exhaust gas pipe 12; an electronic switch 4 mounted to an exhaust pipe 16 and triggered by air flow in the exhaust pipe 16 to send an electric signal; and a control module in which a furnace pressure set value for monitoring the furnace internal pressure and a temperature set value for monitoring the pipe internal temperature of the exhaust gas pipe 12 are predetermined, the control module 5 being provided to be intercommunicable with the pressure detecting member 2, the temperature detecting member 3 and the electronic switch 4 to transmit a first notification signal when the furnace internal pressure reaches the furnace pressure set value, to transmit a second notification signal when the pipe internal temperature reaches the temperature set value and to send a third notification signal when the electric signal is not received. <P>COPYRIGHT: (C)2013,JPO&amp;INPIT

Description

  The present invention relates to a monitoring control device for monitoring the furnace pressure of a combustion furnace in a combustor that generates heat energy by burning combustible waste such as shells discharged in the production process of grains such as rice and wheat. It relates to a control method.

  In the production process of agricultural products and grains, various harvested wastes such as rice husks and sawdust are generated in large quantities and are very bulky. Some attempts have been made with regard to the treatment method and effective utilization method. For example, a combustor in which harvested waste such as rice husk is used as fuel and heat generated by combustion can be used has been proposed (see, for example, Patent Documents 1 and 2).

Taiwan registered utility model No. M304628 Taiwan registered utility model No. M304629

  The heat generated by incineration of these wastes can be used as thermal energy. However, combustion ash and high-temperature gas of several thousand degrees are generated during combustion, which may cause a gas explosion accident. In order to prevent this, it is conceivable that a gas discharge mechanism is installed so that the gas in the combustor is effectively derived and the pressure does not increase, but in order to improve safety, only the gas is discharged. In addition, a predetermined combustion temperature must be maintained. In addition, since there was no means for confirming whether gas was effectively discharged in the combustor, the effect of preventing a gas explosion accident was not certain, and this point also hindered improvement in combustion efficiency. It was.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a monitoring control method and a monitoring control apparatus capable of monitoring the pressure inside the combustion furnace of the combustor.

In order to achieve the above object, according to one aspect, the present invention provides a combustion furnace that burns combustible waste as a fuel to generate thermal energy, and is generated at the time of combustion communicated with the upper end of the combustion furnace. An exhaust gas pipe for deriving high-temperature gas, a heat exchange unit that communicates with the external air through the exhaust gas pipe, and an exhaust pipe that exhausts the heat exchanged through the heat exchange unit. A monitoring control method using a monitoring control device for monitoring the pressure in the combustion furnace in a combustor comprising:
Predetermining a furnace pressure setting value for monitoring the furnace pressure in the monitoring control device and a temperature setting value for monitoring the temperature in the exhaust gas pipe;
Detecting the pressure in the combustion furnace, the temperature of the exhaust gas pipe, and the electrical signal triggered by the air flow in the exhaust pipe by the monitoring control device;
Comparing the in-furnace pressure value with the furnace pressure set value by the monitoring controller, and issuing a first notification signal when the in-furnace pressure reaches the furnace pressure set value;
Comparing the temperature value of the exhaust gas pipe with the temperature set value by the monitoring control device, and issuing a second notification signal when the temperature in the exhaust gas pipe reaches the temperature set value;
It is determined whether or not the electrical signal is received by the supervisory control device, and when the electrical signal is not received, a step of issuing a third notification signal is provided.

According to another aspect, the present invention provides a combustion furnace that generates thermal energy by burning combustible waste as a fuel, and a high-temperature gas that is communicated with the upper end of the combustion furnace and generated during combustion. A combustor comprising: an exhaust gas pipe to be led out; a heat exchange unit that communicates with the external air through the exhaust gas pipe; and an exhaust pipe that discharges the air through the heat exchange through the heat exchange unit In the monitoring control device for monitoring the pressure in the combustion furnace in
A pressure detection member attached to the combustion furnace for detecting an in-furnace pressure of the combustion furnace;
A temperature detection member attached to the exhaust gas pipe for detecting the temperature inside the exhaust gas pipe;
An electronic switch attached to the exhaust pipe and triggered by an air flow in the exhaust pipe to send an electrical signal;
A furnace pressure setting value for monitoring the furnace pressure and a temperature setting value for monitoring the exhaust gas pipe temperature are determined in advance, and when the furnace pressure reaches the furnace pressure setting value, a first value is set. The pressure detection member and the temperature detection member are configured to issue a notification signal, issue a second notification signal when the temperature in the pipe reaches the temperature set value, and send a third notification signal when the electrical signal is not received. And a control module provided so as to be communicable with the electronic switch.

  The monitoring control device and monitoring control method for monitoring the furnace pressure of the combustion furnace according to the present invention monitors and controls the furnace pressure of the combustion furnace and the temperature inside the exhaust pipe, and whether or not the operation of the exhaust pipe is normal. By monitoring and controlling, the exhaust of the combustor can be normally performed and the occurrence of a gas explosion accident can be prevented. Therefore, the combustor can maintain a predetermined combustion temperature in the combustion furnace, can normally discharge the gas, and can improve the combustion efficiency.

It is a front view showing roughly one embodiment of a supervisory control device used for a combustor concerning the present invention. It is a block diagram which shows the structure of the monitoring control apparatus which concerns on this invention. It is a flowchart of the monitoring control method which concerns on this invention.

DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments according to the present invention will be described with reference to the accompanying drawings. The embodiment described below is an example of the present invention, and the present invention is not limited to the following embodiment.
1 and 2 show an embodiment in which a monitoring control device according to the present invention is applied to a combustor 1. The combustor 1 includes a combustion furnace 11 that burns combustible waste as a fuel to generate thermal energy, an exhaust pipe 12 that communicates with the upper end of the combustion furnace 11 and derives a high-temperature gas generated during combustion, A heat exchange unit 13 that communicates with the external air through the exhaust gas pipe 12, an air guide pipe 15 that guides the air heated by heat exchange to the drying unit 14, and the heat exchange unit 13, respectively. And an exhaust pipe 16 for discharging the heat-exchanged gas to the outside.

The monitoring control device according to the present invention is a monitoring control device that monitors the pressure in the combustion furnace 11 in the combustor 1, and includes a pressure detection member 2, a temperature detection member 3, an electronic switch 4, a control module 5, and a notification member 6. And.
The pressure detection member 2 is attached to the combustion furnace 11 and detects the furnace pressure P of the combustion furnace 11.
The temperature detection member 3 is attached to the exhaust gas pipe 12 and detects the internal temperature T of the exhaust gas pipe 12.
The electronic switch 4 is attached to the exhaust pipe 16 and is triggered by a fan (not shown) that is moved by the airflow in the exhaust pipe 16 to transmit an electrical signal. As an example of the electronic switch 4, a non-contact switch is used.

The control module 5 is provided so as to be able to communicate with the pressure detection member 2, the temperature detection member 3, and the electronic switch 4, and monitors the furnace pressure set value P ₀ for monitoring the furnace pressure P and the temperature inside the exhaust gas pipe 12. A preset temperature value T ₀ and a furnace pressure warning value P ₁ smaller than the furnace pressure set value P ₀ are determined in advance.
The notification member 6 is controlled by the control module 5 to issue a first notification signal when the furnace pressure P reaches the furnace pressure set value P ₀ , and when the tube temperature T reaches the temperature set value T ₀ , the second notification. It emits a signal, when the electric signal is not received, issues a third broadcast signal, when the inner pressure P reaches the furnace pressure vigilance value P _1, and sends it to generate a clean signal. Note that sound, light, text, or the like may be used as the notification signal.

Next, a furnace pressure monitoring control method using the furnace pressure monitoring control apparatus for the combustion furnace 11 according to the present invention will be described with reference to FIGS.
In step S71, the combustor 1 is started.
In step S72, the combustor 1 starts an automatic combustion process.
In step S73, the control module 5 calculates the required amount of combustible waste to be supplied to the combustion furnace 11 in the combustion process according to the required amount of thermal energy.
In step S74, an exhaust control process is performed by the control module 5, and at the same time, the process proceeds to step S75, step S76, and step S77.

  In step S75, it is determined whether or not the control module 5 has received an electrical signal from the electronic switch 4. If it is determined that the electrical signal has been received, the process proceeds to step S78. On the other hand, if it is determined that the electrical signal is not received, the process proceeds to step S79.

In step S76, the pressure detection member 2 detects the in-furnace pressure P of the combustion furnace 11 and sends it to the control module 5 before proceeding to step S80.
In step S77, the temperature detection member 3 detects the in-pipe temperature T of the exhaust gas pipe 12 and sends it to the control module 5 before proceeding to step S84.

In step S78, the control module 5 confirms that the operation of the exhaust pipe 16 is normal, and proceeds to step S73.
In step S79, the control module 5 issues one third notification signal such as sound, light, or character from the notification member 6 to notify the worker that the operation of the exhaust pipe 16 is abnormal.

In step S80, the control module 5 determines whether furnace pressure P of the combustion furnace 11 reaches the furnace pressure vigilance value P _1. If furnace pressure P is determined to reach the furnace pressure vigilance value P ₁ in step S80, the process proceeds to step S81. On the other hand, if the furnace pressure P does not reach the furnace pressure alarm value P _1, the process proceeds to step S73.
In step S <b> 81, the control module 5 generates and sends a cleaning signal via the notification member 6 to notify the worker to clean the combustion furnace 11.
At step S82, the control module 5 determines whether furnace pressure P of the combustion furnace 11 reaches the furnace pressure set value P _0. If it is determined that the furnace pressure P of the combustion furnace 11 has reached the furnace pressure set value P ₀ , the process proceeds to step S83. On the other hand, when the furnace pressure P of the combustion furnace 11 is determined not to reach the furnace pressure set value P _0, the process proceeds to step S73.
In step S83, the control module 5 generates a first notification signal from the notification member 6 to notify the worker that the pressure in the furnace of the combustion furnace 11 is abnormal.

In step S84, the control module 5 determines whether or not the in-pipe temperature T of the exhaust gas pipe 12 reaches the temperature set value T ₀ . If it is determined that the tube temperature T has reached the temperature set value T ₀ , the process proceeds to step S85. On the other hand, if it is determined that the tube temperature T does not reach the temperature set value T ₀ , the process proceeds to step S73.
In step S85, the control module 5 generates and sends a second notification signal via the notification member 6, and notifies the operator that the temperature in the exhaust pipe 12 is abnormal.

  Thus, the exhaust pressure of the combustor 1 is controlled by monitoring and controlling the furnace pressure P of the combustion furnace 11 and the temperature T of the exhaust gas pipe 12 and whether or not the operation of the exhaust pipe 16 is normal. This is done normally and can prevent gas explosion accidents. Therefore, the gas can be discharged normally in the combustor 1, and a predetermined combustion temperature can be maintained in the combustion furnace 11, so that the combustion efficiency can be improved.

  The monitoring control device and the monitoring control method according to the present invention prevent the occurrence of a gas explosion accident in a combustor that generates heat energy by burning combustible waste such as shells discharged in the production process of grains such as rice and wheat. Useful to prevent.

DESCRIPTION OF SYMBOLS 1 Combustor 11 Combustion furnace 12 Exhaust gas pipe 13 Heat exchange unit 14 Drying unit 15 Air guide pipe 16 Exhaust pipe 2 Pressure detection member 3 Temperature detection member 4 Electronic switch 5 Control module 6 Notification member P Furnace pressure P ₀ Furnace pressure setting value P ₁ furnace pressure warning value T Pipe temperature T ₀ Temperature setting value

Claims (5)

A combustion furnace that burns combustible waste as fuel to generate thermal energy; an exhaust pipe that communicates with the upper end of the combustion furnace to derive high-temperature gas generated during combustion; and communicates with the exhaust pipe A monitoring control device for monitoring the pressure in the combustion furnace in a combustor comprising a heat exchanging unit for exchanging heat with external air and an exhaust pipe for discharging the air exchanged with the heat exchanging unit. A monitoring control method using
Predetermining a furnace pressure setting value for monitoring the furnace pressure in the monitoring control device and a temperature setting value for monitoring the temperature in the exhaust gas pipe;
Detecting the pressure in the combustion furnace, the temperature of the exhaust gas pipe, and the electrical signal triggered by the air flow in the exhaust pipe by the monitoring control device;
Comparing the in-furnace pressure value with the furnace pressure set value by the monitoring controller, and issuing a first notification signal when the in-furnace pressure reaches the furnace pressure set value;
Comparing the temperature value of the exhaust gas pipe with the temperature set value by the monitoring control device, and issuing a second notification signal when the temperature in the exhaust gas pipe reaches the temperature set value;
Determining whether or not the electrical signal has been received by the monitoring control device, and issuing a third notification signal if the electrical signal is not received, monitoring furnace pressure of the combustor Control method. Set a furnace pressure warning value smaller than the furnace pressure set value in the monitoring control device,
Prior to the comparison between the furnace pressure value and the furnace pressure set value by the monitoring control device, the furnace pressure value and the furnace pressure warning value are compared, and the furnace pressure becomes the furnace pressure warning value. The method for monitoring and controlling a furnace pressure of a combustor according to claim 1, further comprising a step of sending a cleaning signal when the temperature reaches. A combustion furnace that burns combustible waste as fuel to generate thermal energy; an exhaust pipe that communicates with the upper end of the combustion furnace to derive high-temperature gas generated during combustion; and communicates with the exhaust pipe A monitoring control device for monitoring the pressure in the combustion furnace in a combustor comprising a heat exchanging unit for exchanging heat with external air and an exhaust pipe for discharging heat exchanged with the heat exchanging unit. Because
A pressure detection member attached to the combustion furnace for detecting an in-furnace pressure of the combustion furnace;
A temperature detection member attached to the exhaust gas pipe for detecting the temperature inside the exhaust gas pipe;
An electronic switch attached to the exhaust pipe and triggered by an air flow in the exhaust pipe to send an electrical signal;
A furnace pressure setting value for monitoring the furnace pressure and a temperature setting value for monitoring the exhaust gas pipe temperature are determined in advance, and when the furnace pressure reaches the furnace pressure setting value, a first value is set. The pressure detection member and the temperature detection member are configured to issue a notification signal, issue a second notification signal when the temperature in the pipe reaches the temperature set value, and send a third notification signal when the electrical signal is not received. And a control module provided to be communicable with the electronic switch. A furnace pressure monitoring and control device for a combustor. A furnace pressure warning value smaller than the furnace pressure set value is further set in the control module,
Prior to the comparison between the furnace pressure value and the furnace pressure set value by the control module, the furnace pressure value and the furnace pressure warning value are compared, and the furnace pressure reaches the furnace pressure warning value. Then, a cleaning signal is sent out, and the furnace pressure monitoring and control device of the combustor according to claim 3.   The said electronic switch is a non-contact-type switch, The furnace pressure monitoring control apparatus of the combustor of Claim 3 characterized by the above-mentioned.

Images