Energy consumption metering system for low-voltage and high-power equipment of lime kiln and detection method

Abstract

The invention relates to an energy consumption metering system and detection method for low-voltage and high-power equipment of a lime kiln, and the energy consumption metering system comprises at least one intelligent electric meter and a PLC control system. The intelligent electric meter is arranged on the lime kiln configuration equipment and is connected with the PLC control system through the switch; the intelligent electric meter is used for collecting electric energy signals of lime kiln configuration equipment; the detection process comprises the following steps: acquiring a signal; controlling the operation frequency of the frequency converter by the PLC according to the received signal; the intelligent electric meter is arranged so that electric energy signals of the lime kiln configuration equipment can be conveniently detected in real time to know the energy consumption condition, operation of the lime kiln configuration equipment is controlled and optimized through the PLC control system, and therefore the purpose of saving energy consumption is achieved, energy waste is avoided, and economic benefits are improved.

Description

Technical Field

[0001] This invention relates to the field of industrial lime kiln technology, and in particular to an energy consumption metering system and detection method for low-pressure, high-power equipment in lime kilns. Background Technology

[0002] Currently, lime kilns are used to calcine limestone to produce quicklime. During production, limestone and fuel are loaded into the lime kiln, preheated to 850 degrees Celsius to begin decomposition, and calcined to 1200 degrees Celsius to complete the process. After cooling, the limestone is unloaded from the kiln, thus completing the production of quicklime.

[0003] Lime kilns primarily rely on the heat released from gas combustion to calcine lime. The gaseous fuel used in lime kilns is converter gas or a mixture of blast furnace and coke oven gas. In the past, lime calcination was mainly based on the theoretical process parameters provided by the original design unit and the actual experience of the workers on site. By adjusting various process parameters, qualified quicklime was produced. However, in this process, there was a lack of real-time monitoring of energy consumption. Energy consumption could only be understood during monthly settlements, resulting in fluctuating energy consumption and a significant waste of energy, failing to meet the requirements for energy conservation. Summary of the Invention

[0004] To address the shortcomings of existing technologies, the purpose of this invention is to provide an energy consumption metering system and detection method for low-pressure, high-power equipment in lime kilns. Its advantages include the ability to monitor energy consumption in real time, save energy, avoid energy waste, and improve economic efficiency.

[0005] The above-mentioned objective of this invention is achieved through the following technical solution: On one hand, this invention provides an energy consumption metering system for low-voltage, high-power equipment in a lime kiln, comprising at least one smart meter and a PLC control system; the smart meter is installed on the lime kiln equipment, and the smart meter is connected to the PLC control system via a switch; the smart meter is used to collect the power signal of the lime kiln equipment.

[0006] Preferably, in the energy consumption metering system for low-pressure, high-power equipment in lime kilns provided by the present invention, the smart meter is equipped with an RJ45 communication interface, and the RJ45 communication interface adopts the standard Modbus TCP communication protocol.

[0007] Preferably, in the energy consumption metering system for low-pressure, high-power equipment in lime kilns provided by the present invention, the interactive machine is a 24-port interactive machine.

[0008] Preferably, the energy consumption metering system for low-pressure, high-power equipment in lime kilns provided by the present invention includes at least one of the following: a combustion fan, a lime cooling fan, a waste gas dust removal fan, a winch, a belt conveyor, a raw material dust removal fan, a finished product dust removal fan, and a gas pressurizing fan.

[0009] Preferably, the energy consumption metering system for low-pressure, high-power equipment in lime kilns provided by the present invention further includes an exhaust gas detection component. The exhaust gas detection component is installed at the waste exhaust port of the lime kiln and is connected to the PLC control system. The exhaust gas detection component is used to collect the CO and O2 content in the exhaust gas of the lime kiln in real time.

[0010] Preferably, the energy consumption metering system for low-pressure, high-power equipment in lime kilns provided by the present invention includes a carbon monoxide gas alarm and an oxygen gas alarm in the exhaust gas detection component. Both the carbon monoxide gas alarm and the oxygen gas alarm are installed at the waste exhaust port of the lime kiln, and both the carbon monoxide gas alarm and the oxygen gas alarm are connected to the PLC control system.

[0011] On the other hand, the present invention provides a detection method for an energy consumption metering system for low-pressure, high-power equipment in a lime kiln as described above, comprising the following steps: The smart meter collects the electrical energy signal of the lime kiln equipment in real time, and transmits the collected electrical energy signal to the PLC control system through the interactive machine and / or collects the CO and O2 content information in the lime kiln exhaust gas in real time through the exhaust gas detection component, and transmits the collected information to the PLC control system. The PLC control system controls the operating frequency of the frequency converter based on the received electrical energy signal and / or the received information on the CO and O2 content in the lime kiln exhaust gas.

[0012] Preferably, the detection method for the energy consumption metering system of a low-pressure, high-power lime kiln provided by the present invention, wherein the PLC control system controls the operating frequency of the frequency converter based on the received electrical energy signal and / or the received information on the CO and O2 content in the lime kiln exhaust gas, includes: The PLC control system controls the operating frequency of the frequency converter according to the received electrical energy signal to control the operation of the combustion fan and / or gas pressurizing fan; And / or the PLC control system controls the operating frequency of the frequency converter based on the received information on the CO and O2 content in the lime kiln exhaust gas in order to control the operation of the combustion fan and / or the gas pressurizing fan.

[0013] Preferably, the detection method for the energy consumption metering system of a low-pressure, high-power equipment in a lime kiln provided by the present invention, wherein the PLC control system controls the operating frequency of the frequency converter according to the received electrical energy signal to control the operation of the combustion fan and / or gas pressurizing fan, includes: Based on the lime kiln's 600TPD capacity and the gas calorific value, the gas volume is calculated, and the PLC control system sends a signal to the frequency converter to start the No. 1 gas pressurizing fan and the No. 2 gas pressurizing fan. The combustion air volume is configured according to the gas volume. The PLC control system sends a signal to the frequency converter to start the combustion fans 1# to 3# respectively to achieve complete combustion. If there is any deviation, the air volume of the combustion fans is adjusted by the frequency converter.

[0014] Preferably, the detection method of the energy consumption metering system for low-pressure high-power equipment in lime kilns provided by the present invention, wherein the PLC control system controls the operating frequency of the frequency converter according to the received information on the CO and O2 content in the lime kiln exhaust gas to control the operation of the combustion fan and / or gas pressurizing fan, includes: the PLC control system determines the operating frequency output to the frequency converter according to the received information on the CO and O2 content in the lime kiln exhaust gas; when the CO or O2 content in the lime kiln exhaust gas is low, the PLC control system performs corresponding calculations to control the operating frequency of the frequency converter to decrease, thereby controlling the speed of the combustion fan to decrease.

[0015] In summary, the beneficial technical effects of this invention are as follows: The energy consumption metering system and detection method for low-voltage, high-power equipment in lime kilns provided in this application include at least one smart meter and a PLC control system; the smart meter is installed on the lime kiln equipment and connected to the PLC control system via a switch; the smart meter is used to collect the electrical energy signals of the lime kiln equipment; the detection process is as follows: signal acquisition - PLC controls the inverter operating frequency according to the received signal; by setting up a smart meter, the electrical energy signals of the lime kiln equipment can be detected in real time to understand the energy consumption, and the operation of the lime kiln equipment can be optimized through the PLC control system, thereby achieving the purpose of saving energy, avoiding energy waste, and improving economic efficiency. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the energy consumption metering system for low-pressure, high-power equipment in lime kilns provided in an embodiment of the present invention.

[0017] Figure 2 This is a schematic diagram of the detection circuit for detecting the CO and O2 content in the exhaust gas of a lime kiln in the detection method of the energy consumption metering system for low-pressure high-power equipment in a lime kiln provided in an embodiment of the present invention.

[0018] Figure 3 This is a control circuit diagram of the PLC system for adjusting the speed of the combustion fan and the pressurizing fan in the detection method of the energy consumption metering system for low-pressure high-power equipment in lime kilns provided in the embodiments of the present invention.

[0019] Figure 4 This is a flowchart of a detection method for an energy consumption metering system for low-pressure, high-power equipment in a lime kiln, provided in another embodiment of the present invention. Detailed Implementation

[0020] The present invention will be further described in detail below with reference to the accompanying drawings.

[0021] Reference Figure 1 This invention discloses an energy consumption metering system for low-voltage, high-power equipment in a lime kiln, comprising at least one smart meter and a PLC control system. The smart meter is installed on the lime kiln equipment and connected to the PLC control system via a switch. The smart meter is used to collect the electrical energy signal of the lime kiln equipment. By setting up the smart meter, the energy consumption of the lime kiln equipment can be monitored in real time, and the operation of the lime kiln equipment can be optimized through the PLC control system, thereby achieving the purpose of saving energy, avoiding energy waste, and improving economic efficiency.

[0022] It should be noted that the lime kiln is equipped with main energy-consuming equipment exceeding 100KW.

[0023] The smart meter is equipped with an RJ45 communication interface, which uses the standard Modbus TCP communication protocol. This configuration allows the smart meter to be integrated into any power monitoring system for data acquisition and control.

[0024] During use, the power signal is collected through the RJ45 communication interface on the smart meter and transmitted to the PLC control system through the switch.

[0025] The lime kiln is equipped with at least one of the following: a combustion fan, a lime cooling fan, a waste gas dust removal fan, a winch, a belt conveyor, a raw material dust removal fan, a finished product dust removal fan, and a gas pressurizing fan.

[0026] Specifically, smart meters are installed on the combustion blower, lime cooling blower, exhaust gas dust removal blower, winch, belt conveyor, raw material dust removal blower, finished product dust removal blower, and gas pressurizing blower. Each smart meter is connected to the PLC control system. This setup allows for unified collection of electrical energy and transmission to the PLC control system. By controlling the operation of the gas pressurizing blower and / or combustion blower, energy conservation is achieved, thereby improving economic efficiency.

[0027] The facility includes 3 combustion-supporting blowers and 2 gas pressurizing blowers. The 3 combustion-supporting blowers are No. 1, No. 2 and No. 3; the 2 gas pressurizing blowers are No. 1 and No. 2.

[0028] For example, the interactive machine is a 24-port interactive machine.

[0029] In this embodiment, the PLC system communicates with the frequency converter via Profinet communication and sends frequency conversion (4~20mA signal) adjustment commands to the frequency converter for the gas pressurizing fan and the combustion fan. That is, by controlling the operating frequency of the frequency converter, the operation of the gas pressurizing fan and / or the combustion fan is controlled.

[0030] Furthermore, the energy consumption metering system for low-pressure, high-power equipment in lime kilns provided in this embodiment also includes an exhaust gas detection component. The exhaust gas detection component is installed at the waste exhaust port of the lime kiln and is connected to the PLC control system. The exhaust gas detection component is used to collect the CO and O2 content in the exhaust gas of the lime kiln in real time.

[0031] Continue to refer to Figure 2-3 In this embodiment, the exhaust gas detection component includes a carbon monoxide alarm and an oxygen alarm. Both the carbon monoxide alarm and the oxygen alarm are installed at the exhaust port of the lime kiln and are connected to the PLC control system. This configuration allows for real-time collection of CO and O2 content information of the lime kiln exhaust gas, and the collection of CO and O2 content information is sent to the PLC control system to adjust the speed of the combustion fan and the pressurizing fan, control the air volume, achieve complete combustion (no excess CO), and achieve a suitable coal-oxygen ratio (no excess O2), thereby realizing energy saving.

[0032] Specifically, during use, the carbon monoxide and oxygen gas alarms on site transmit signals to the PLC control system via 4-20mA.

[0033] Continue to refer to Figure 4 Another embodiment of the present invention provides a detection method for an energy consumption metering system for low-pressure, high-power equipment in a lime kiln as described above, comprising the following steps: S101. The power signal of the lime kiln configuration equipment is collected in real time by a smart meter and transmitted to the PLC control system through an interactive machine and / or the CO and O2 content information in the lime kiln exhaust gas is collected in real time by an exhaust gas detection component and transmitted to the PLC control system. S102. The PLC control system controls the operating frequency of the frequency converter based on the received electrical energy signal and / or the CO and O2 content information in the lime kiln exhaust gas. With this setting, the PLC control system controls the operating frequency of the frequency converter, thereby controlling the operation of the lime kiln equipment, so as to achieve the purpose of saving energy, avoiding energy waste, and improving economic efficiency.

[0034] Among them, S102, the PLC control system controls the operating frequency of the frequency converter based on the received electrical energy signal and / or the received information on the CO and O2 content in the lime kiln exhaust gas, including: S1021, The PLC control system controls the operating frequency of the frequency converter according to the received power signal to control the operation of the combustion fan and / or gas pressurizing fan.

[0035] Specifically, the S1021 and PLC control system control the operating frequency of the frequency converter based on the received electrical energy signal to control the operation of the combustion fan and / or gas pressurizing fan, including: S10211. Based on the lime kiln's 600TPD capacity and the gas calorific value, calculate the gas volume and send the start-up command for No. 1 gas pressurizing blower and No. 2 gas pressurizing blower to the frequency converter through the PLC control system. S10212. Configure the combustion air volume according to the gas volume, and send the PLC control system to the frequency converter to start the combustion fans 1#~3# respectively to achieve complete combustion. If there is any deviation, adjust the air volume of the combustion fans through the frequency converter.

[0036] Specifically, based on the lime kiln's 600TPD capacity and the gas's calorific value, the program calculates the required gas volume.

[0037] It should be noted that the above-mentioned calculation process is well known to those skilled in the art, and the calculation process will not be described in detail here.

[0038] Specifically, based on the lime kiln's 600TPD capacity and the gas's calorific value, the program calculates the required gas volume and starts the No. 1 and No. 2 gas pressurizing blowers; then, based on the gas volume, it configures the combustion air volume and starts the No. 1 to No. 3 combustion air blowers respectively to achieve complete combustion.

[0039] If there is a deviation, the air volume of the combustion fan is adjusted by the frequency converter to maximize energy saving. That is, if high CO or high O2 is detected in the exhaust gas, the speed of the combustion fan is adjusted by the frequency converter controlled by the PLC.

[0040] The S1022 and / or PLC control system controls the operating frequency of the frequency converter based on the received information on the CO and O2 content in the lime kiln exhaust gas, thereby controlling the operation of the combustion fan and / or gas pressurizing fan.

[0041] Among them, the S1022 PLC control system controls the operating frequency of the frequency converter based on the received information on the CO and O2 content in the lime kiln exhaust gas to control the operation of the combustion fan and / or gas pressurizing fan. This includes: the PLC control system determines the operating frequency to be output to the frequency converter based on the received information on the CO and O2 content in the lime kiln exhaust gas. When the CO or O2 content in the lime kiln exhaust gas is low, the PLC control system performs corresponding calculations and controls the operating frequency of the frequency converter to decrease, thereby controlling the speed of the combustion fan to decrease. This setting achieves the purpose of energy saving.

[0042] Specifically, the PLC control system determines the operating frequency to be output to the frequency converter through logical operations based on the CO and O2 content information received in the lime kiln exhaust gas.

[0043] Logical operations are processes well known to those skilled in the art, and will not be described in detail here.

[0044] This application provides an energy consumption metering system and detection method for low-voltage, high-power equipment in lime kilns. The energy consumption metering system includes at least one smart meter and a PLC control system. The smart meter is installed on the lime kiln equipment and connected to the PLC control system via a switch. The smart meter is used to collect the electrical energy signals from the lime kiln equipment. The detection process is as follows: signal acquisition – the PLC controls the inverter's operating frequency based on the received signal. By setting up the smart meter, the electrical energy signals of the lime kiln equipment can be detected in real time to understand energy consumption. The PLC control system can then optimize the operation of the lime kiln equipment, thereby achieving energy savings, avoiding energy waste, and improving economic efficiency.

[0045] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0046] Finally, it should be noted that the above embodiments are merely examples for clearly illustrating the present invention and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. An energy consumption metering system for low-pressure, high-power equipment in a lime kiln, characterized in that: Includes at least one smart meter and PLC control system; The smart meter is installed on the lime kiln configuration equipment, and the smart meter is connected to the PLC control system through a switch; The smart meter is used to collect the electrical energy signals of the equipment configured in the lime kiln.

2. The energy consumption metering system for low-pressure, high-power equipment in a lime kiln according to claim 2, characterized in that: The smart meter is equipped with an RJ45 communication interface, which uses the standard Modbus TCP communication protocol.

3. The energy consumption metering system for low-pressure, high-power equipment in a lime kiln according to claim 1, characterized in that: The interactive machine is a 24-port interactive machine.

4. The energy consumption metering system for low-pressure, high-power equipment in a lime kiln according to claim 1, characterized in that: The lime kiln equipment includes at least one of the following: combustion fan, lime cooling fan, exhaust gas dust removal fan, winch, belt conveyor, raw material dust removal fan, finished product dust removal fan, and gas pressurizing fan.

5. The energy consumption metering system for low-pressure, high-power equipment in a lime kiln according to claim 1, characterized in that: It also includes an exhaust gas detection component, which is installed at the waste exhaust port of the lime kiln and is connected to the PLC control system; The exhaust gas detection component is used to collect the CO and O2 content in the exhaust gas of the lime kiln in real time.

6. The energy consumption metering system for low-pressure, high-power equipment in a lime kiln according to claim 5, characterized in that: The exhaust gas detection component includes a carbon monoxide gas alarm and an oxygen gas alarm. Both the carbon monoxide gas alarm and the oxygen gas alarm are installed at the waste exhaust port of the lime kiln and are connected to the PLC control system.

7. A detection method for an energy consumption metering system for low-pressure, high-power equipment in a lime kiln as described in any one of claims 1 to 6, characterized in that: Includes the following steps: The smart meter collects the electrical energy signal of the lime kiln equipment in real time, and transmits the collected electrical energy signal to the PLC control system through the interactive machine and / or collects the CO and O2 content information in the lime kiln exhaust gas in real time through the exhaust gas detection component, and transmits the collected information to the PLC control system. The PLC control system controls the operating frequency of the frequency converter based on the received electrical energy signal and / or the received information on the CO and O2 content in the lime kiln exhaust gas.

8. The detection method for the energy consumption metering system for low-pressure, high-power equipment in a lime kiln according to claim 7, characterized in that: The PLC control system controls the operating frequency of the frequency converter based on the received electrical energy signal and / or the received information on the CO and O2 content in the lime kiln exhaust gas, including: The PLC control system controls the operating frequency of the frequency converter according to the received electrical energy signal to control the operation of the combustion fan and / or gas pressurizing fan; And / or the PLC control system controls the operating frequency of the frequency converter based on the received information on the CO and O2 content in the lime kiln exhaust gas in order to control the operation of the combustion fan and / or the gas pressurizing fan.

9. The detection method for the energy consumption metering system for low-pressure, high-power equipment in a lime kiln according to claim 8, characterized in that: The PLC control system controls the operating frequency of the frequency converter according to the received electrical energy signal to control the operation of the combustion fan and / or gas pressurizing fan, including: Based on the lime kiln's 600TPD capacity and the gas calorific value, the gas volume is calculated, and the PLC control system sends a signal to the frequency converter to start the No. 1 gas pressurizing fan and the No. 2 gas pressurizing fan. The combustion air volume is configured according to the gas volume. The PLC control system sends a signal to the frequency converter to start the combustion fans 1# to 3# respectively to achieve complete combustion. If there is any deviation, the air volume of the combustion fans is adjusted by the frequency converter.

10. The detection method for the energy consumption metering system of low-pressure high-power equipment in a lime kiln according to claim 9, characterized in that: The PLC control system controls the operating frequency of the frequency converter based on the received information on the CO and O2 content in the lime kiln exhaust gas, thereby controlling the operation of the combustion fan and / or gas pressurizing fan, including: The PLC control system determines the operating frequency of the frequency converter based on the received information on the CO and O2 content in the lime kiln exhaust gas. When the CO or O2 content in the lime kiln exhaust gas is low, the PLC control system performs corresponding calculations to control the frequency converter to reduce its operating frequency, thereby reducing the speed of the combustion fan.

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