Natural gas flow monitoring circuit and flow regulation device

Abstract

This application belongs to the field of natural gas technology and provides a natural gas flow monitoring circuit and flow regulation device. The natural gas flow monitoring circuit includes: a calorific value detection module, a first signal distribution module, a second signal distribution module, and a signal transmission module. The calorific value detection module is used to generate a calorific value detection signal; the first signal distribution module generates multiple first calorific value distribution signals based on the calorific value detection signal; the second signal distribution module is used to generate multiple second calorific value distribution signals based on the first calorific value distribution signals; the signal transmission module is used to generate a calorific value amplification signal and output the amplified calorific value signal to a second control module. This application introduces the calorific value of natural gas into the natural gas flow control, controlling the flow rate of natural gas in the kiln, so that the natural gas flow rate can be automatically compensated according to the change of natural gas calorific value, making rational use of natural gas, reducing resource waste, and ensuring complete combustion of natural gas, thus reducing air pollution.

Description

Technical Field

[0001] This application belongs to the field of natural gas technology, and in particular relates to a natural gas flow monitoring circuit and flow regulation device. Background Technology

[0002] The main combustion media used in kilns are natural gas and heavy oil, followed by pulverized coal, coal tar, and coal gas. Regardless of the combustion medium used, energy conservation and consumption reduction are the survival rules for every enterprise. The precision of the combustion medium flow control, and whether the air-fuel ratio and calorific value of the combustion medium are automatically compensated for in the flow control, determine the kiln's temperature stability, minimal fluctuations in the glass melt level, no bubble boundary drift, and low kiln pressure amplitude. Currently, most kilns use a method of filling the combustion medium with air in a certain ratio. However, the calorific value of the combustion medium usually varies, and different batches of combustion medium have different calorific values. Therefore, problems often arise with too much or too little combustion medium (flow rate). Excessive combustion medium is likely to result in incomplete combustion, wasting resources, while insufficient flow rate affects the melting volume and glass quality.

[0003] In summary, existing methods for filling kilns with combustion media can easily lead to incomplete combustion of the combustion media, resulting in resource waste or affecting product quality. Summary of the Invention

[0004] To address the aforementioned technical problems, this application provides a natural gas flow monitoring circuit and flow regulation device, which can solve the problem that existing methods of filling combustion media into kilns can easily lead to incomplete combustion of the combustion media, resulting in resource waste or affecting product quality.

[0005] A first aspect of this application provides a natural gas flow monitoring circuit, the natural gas flow monitoring circuit comprising:

[0006] The calorific value detection module is installed inside the main natural gas pipeline to detect the calorific value of natural gas and generate a calorific value detection signal.

[0007] The first signal distribution module is connected to the calorific value detection module and is used to receive the calorific value detection signal and generate multiple first calorific value distribution signals according to the calorific value detection signal, one of which is output to the first control module.

[0008] The second signal distribution module is connected to the first signal distribution module and is used to receive the first heat value distribution signal and generate multiple second heat value distribution signals according to the first heat value distribution signal.

[0009] The signal transmission module, connected to the second signal distribution module, is used to connect the received second calorific value distribution signal in parallel with a 120-ohm mother resistor and then process it through radio power amplification to generate a calorific value amplified signal, and output the calorific value amplified signal to the second control module.

[0010] In one embodiment, the calorific value detection module is a natural gas calorific value meter.

[0011] In one embodiment, the natural gas calorimeter is model OHC-800.

[0012] In one embodiment, the first signal allocation module includes:

[0013] The first signal distribution input interface is connected to the calorific value detection module and is used to receive the calorific value detection signal;

[0014] The first signal distribution unit is connected to the first signal distribution input interface and is used to perform copy distribution processing on the calorific value detection signal to generate multiple first calorific value distribution signals.

[0015] Multiple first signal distribution output interfaces are provided, each of which is connected to the first signal distribution unit to output the multiple first heat value distribution signals one by one.

[0016] In one embodiment, the signal transmission module includes:

[0017] A signal input unit, connected to the second signal distribution module, is used to receive the second heat value distribution signal;

[0018] A signal amplification unit, connected to the signal input unit, is used to amplify the second calorific value distribution signal to generate the calorific value amplification signal;

[0019] A signal output unit, connected to the signal amplification unit, is used to output the calorific value amplification signal to the second control module.

[0020] A second aspect of this application provides a natural gas flow regulating device, comprising: a kiln, characterized in that it further comprises:

[0021] Natural gas flow monitoring circuit as described in any of the above;

[0022] The first control module, connected to the first signal distribution module, is used to receive the first calorific value distribution signal and generate a first flow release signal according to the first calorific value distribution signal, so as to control the magnitude of the natural gas flow in the corresponding kiln.

[0023] The second control module, connected to the second signal distribution module, is used to receive the second calorific value distribution signal and generate a second flow release signal based on the second calorific value distribution signal, so as to control the magnitude of the natural gas flow in the corresponding kiln.

[0024] In one embodiment, the first control module includes:

[0025] The first decoding unit is connected to the first signal allocation module and is used to receive the first heat value allocation signal, decode the first heat value allocation signal, generate a first heat value decoding signal and output it.

[0026] The first control unit is connected to the first decoding unit and is used to receive the first calorific value decoding signal and generate the first flow release signal according to the first calorific value decoding signal, so as to control the magnitude of the natural gas flow in the corresponding kiln.

[0027] In one embodiment, the first decoding unit outputs the first heat value decoding signal at a first frequency and maintains the same output of the first heat value decoding signal within a first time threshold. If the first time threshold is exceeded, the first heat value decoding signal is refreshed and output.

[0028] In one embodiment, if the first decoding unit fails to refresh the first heat value decoding signal for more than the first time threshold, it continues to output the first heat value decoding signal before the refresh and outputs a heat value alarm signal.

[0029] In one embodiment, the first control unit calculates the first flow release signal according to a first calculation formula;

[0030] The first calculation formula is:

[0031]

[0032] Wherein, A is the first flow release signal, B is the preset flow value of the kiln, C is the preset standard natural gas calorific value, and D is the first calorific value decoding signal.

[0033] The beneficial effects of this application embodiment compared with the prior art are as follows: The main concept of this application is that by setting a calorific value detection module in the natural gas monitoring circuit, the calorific value of natural gas can be detected in real time, and then the calorific value of natural gas is sent to the corresponding control module. The corresponding control module controls the flow rate of natural gas in the corresponding kiln according to the calorific value of natural gas. This application introduces the calorific value of natural gas into the flow control of natural gas, controls the flow rate of natural gas in the kiln, so that natural gas can be used rationally according to its calorific value, reducing resource waste, and at the same time, it can make natural gas burn completely, reducing air pollution. Attached Figure Description

[0034] Figure 1 This is a schematic diagram of the structure of a natural gas flow monitoring circuit provided in one embodiment of this application;

[0035] Figure 2 This is a schematic diagram of the structure of a first signal distribution module provided in one embodiment of this application;

[0036] Figure 3 This is a schematic diagram of the structure of a second signal distribution module provided in one embodiment of this application;

[0037] Figure 4 This is a schematic diagram of the structure of a signal transmission module provided in one embodiment of this application;

[0038] Figure 5 This is a schematic diagram showing the connection between the calorific value detection module and the first signal distribution module according to one embodiment of this application;

[0039] Figure 6 This is a schematic diagram of the specific structure of the second signal distribution module provided in one embodiment of this application;

[0040] Figure 7 This is a schematic diagram of the specific structure of a signal transmission module provided in one embodiment of this application;

[0041] Figure 8 This is a schematic diagram of the specific structure of the first decoding unit provided in one embodiment of this application. Detailed Implementation

[0042] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0043] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0044] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0045] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means one or more, unless otherwise explicitly specified.

[0046] In the building materials industry, kilns are one of the essential thermal equipment. The main combustion media for kilns are natural gas and heavy oil, followed by pulverized coal, coal tar, and coal gas. Regardless of the combustion medium used, energy conservation and consumption reduction are the survival rules for every enterprise. The accuracy of the combustion medium flow control, and whether the air-fuel ratio and calorific value of the combustion medium are automatically compensated for in the flow control, determine the kiln's temperature stability, minimal fluctuations in the glass melt level, no bubble boundary drift, and low kiln pressure amplitude. Currently, most kilns use a method of filling the combustion medium by mixing air and combustion medium in a certain ratio. However, the calorific value of the combustion medium usually varies, and different batches of combustion medium have different calorific values. Therefore, the problem of overfilling or underfilling the combustion medium often occurs. Excessive combustion medium is very likely to result in incomplete combustion, leading to wasted resources.

[0047] To solve the above technical problems, refer to Figure 1 As shown in the figure, this application embodiment provides a natural gas flow monitoring circuit, which includes: a calorific value detection module 10, a first signal distribution module 20, a second signal distribution module 30, and a signal transmission module 40.

[0048] Specifically, the calorific value detection module 10 is installed inside the natural gas main pipeline. The calorific value detection module 10 is used to detect the calorific value of natural gas and generate a calorific value detection signal. A first signal distribution module 20 is connected to the calorific value detection module 10. The first signal distribution module 20 receives the calorific value detection signal and generates multiple first calorific value distribution signals based on the calorific value detection signal, one of which is output to the first control module 50. A second signal distribution module 30 is connected to the first signal distribution module 20. The second signal distribution module 30 receives the first calorific value distribution signal and generates multiple second calorific value distribution signals based on the first calorific value distribution signal. A signal transmission module 40 is connected to the second signal distribution module 30. The signal transmission module 40 connects the received second calorific value distribution signal in parallel with a 120-ohm resistor and then amplifies it through a radio power amplifier to generate a calorific value amplified signal, which is then output to the second control module 60. Here, the calorific value of natural gas refers to the calorific value per unit volume of natural gas.

[0049] In this embodiment, the calorific value detection module 10 is used to detect the calorific value of the natural gas in the main natural gas pipeline and generate a calorific value detection signal. Specifically, the calorific value detection module 10 is used to detect the calorific value of the natural gas in the main natural gas pipeline in real time. For example, the calorific value detection module 10 can detect the calorific value of the natural gas in the main natural gas pipeline at regular intervals or at a certain frequency, and generate a calorific value detection signal. By setting the calorific value detection module 10 to detect the calorific value of natural gas at regular intervals or at a certain frequency, the calorific value of natural gas can be detected in real time, because the calorific value of different batches of natural gas may be different. Through the calorific value detection module 10, a more comprehensive understanding of the calorific value of natural gas can be obtained, laying the foundation for setting the natural gas flow rate based on the calorific value of natural gas in the future.

[0050] In this embodiment, the first signal distribution module 20 generates multiple first calorific value distribution signals based on the calorific value detection signal. One first calorific value signal is sent to the first control module 50, and another first calorific value signal is sent to the second signal distribution module 30. It can be understood that the first control module 50 is used to control the flow rate of natural gas on a production line that is relatively close to the first signal distribution module 20. When one first calorific value signal is output to the first control module 50, the first control module 50 uses the first calorific value distribution signal as a reference to control the flow rate of natural gas on its production line.

[0051] In this embodiment, the second signal distribution module 30 generates multiple second calorific value distribution signals based on the first calorific value distribution signal and outputs them to the second control module 60 via the signal transmission module 40. It can be understood that the second control module 60 is used to control the flow rate of natural gas in a production line located far from the second signal distribution module 30. Therefore, the signal transmission module 40 needs to amplify the power of the second calorific value distribution signals to facilitate better transmission to the second control module 60. Once a second calorific value signal is output to the second control module 60, the second control module 60 uses the second calorific value distribution signal as a reference to control the flow rate of natural gas on its production line.

[0052] In this embodiment, the signal transmission module 40 is connected to the second signal distribution module 30. The signal transmission module 40 is used to connect the received second thermal value distribution signal in parallel with a 120-ohm resistor and then process it through radio power amplification to generate a thermal value amplification signal, and output the thermal value amplification signal to the second control module 60. Specifically, the 120Ω resistor in parallel with the second thermal value distribution signal is mainly used to convert the current type signal into a voltage type signal. For example, the 120Ω resistor in parallel is used to process the current type second thermal value distribution signal into a voltage type signal, and then process it through radio power amplification to generate a thermal value amplification signal, and output the thermal value amplification signal to the second control module 60.

[0053] This embodiment of the application, by setting up a first signal distribution module 20, a second signal distribution module 30, and a signal transmission module 40, enables production lines closer to the first signal distribution module to directly output signals from the first signal distribution module 20 to the corresponding control module, such as the first control module 50, to control the corresponding production line to adjust the natural gas flow rate according to the calorific value of the natural gas. Production lines farther from the first signal distribution module 20 and the second signal distribution module 30 output signals from the signal transmission module 40 to the corresponding control module, such as the second control module 60, to control the corresponding production line to adjust the natural gas flow rate according to the calorific value of the natural gas. This allows all production lines to adjust the natural gas flow rate according to the calorific value of the natural gas, thereby saving energy, enabling more complete combustion of natural gas, and further reducing air pollution.

[0054] In one embodiment, the calorific value detection module 10 is a natural gas calorific value meter.

[0055] Specifically, a natural gas calorific value analyzer is installed inside the main natural gas pipeline. It can periodically or at a certain frequency detect the calorific value of the natural gas in the pipeline and generate a calorific value detection signal. By setting the natural gas calorific value analyzer to detect the calorific value of natural gas periodically or at a certain frequency, the calorific value of natural gas can be detected in real time, because the calorific value of different batches of natural gas may be different. The natural gas calorific value analyzer provides a more comprehensive understanding of the calorific value of natural gas, laying the foundation for subsequently setting the natural gas flow rate based on the calorific value.

[0056] In one embodiment, the natural gas calorimeter is model OHC-800. The OHC-800 natural gas calorimeter uses an independently developed Optsonic calculation method, which can remove the influence of gases that do not have the heat of fuel gas (N2, O2, CO2, etc.), thus enabling accurate and reliable measurement of the heat of fuel gas.

[0057] In one embodiment, reference Figure 2 As shown, the first signal distribution module 20 includes: a first signal distribution input interface 21, a first signal distribution unit 22, and multiple first signal distribution output interfaces 23.

[0058] Specifically, the first signal distribution input interface 21 is connected to the calorific value detection module 10, and the first signal distribution input interface 21 is used to receive the calorific value detection signal; the first signal distribution unit 22 is connected to the first signal distribution input interface 21, and the first signal distribution unit 22 is used to perform copy distribution processing on the calorific value detection signal to generate multiple first calorific value distribution signals; each first signal distribution output interface 23 is connected to the first signal distribution unit 22, and the multiple first signal distribution output interfaces 23 are used to output the multiple first calorific value distribution signals one by one.

[0059] In this embodiment, the first signal distribution input interface 21 receives the calorific value detection signal and outputs it to the first signal distribution unit 22. The first signal distribution unit 22 copies the calorific value detection signal into multiple first calorific value distribution signals, and then outputs them one by one through multiple first signal distribution output interfaces 23. The main function of the first signal distribution unit 22 is to copy the calorific value detection signal into multiple first calorific value distribution signals to meet the needs of multiple production lines. One of the multiple first signal distribution output interfaces 23 outputs the first calorific value distribution signal to the first control module 50, and another interface outputs the first calorific value distribution signal to the second signal distribution module 30, thereby meeting the needs of multiple production lines.

[0060] In one embodiment, reference Figure 3 As shown, the second signal distribution module 30 includes: a second signal distribution input interface 31, a second signal distribution unit 32, and multiple second signal distribution output interfaces 33.

[0061] Specifically, the second signal distribution input interface 31 is connected to the first signal distribution module 20, and the second signal distribution input interface 31 is used to receive the first calorific value distribution signal; the second signal distribution unit 32 is connected to the second signal distribution input interface 31, and the second signal distribution unit 32 is used to perform copy distribution processing on the first calorific value distribution signal to generate multiple second calorific value distribution signals; each second signal distribution output interface 33 is connected to the second signal distribution unit 32, and the multiple second signal distribution output interfaces 33 are used to output the multiple second calorific value distribution signals one by one.

[0062] In this embodiment, the second signal distribution input interface 31 receives the first calorific value distribution signal and outputs it to the second signal distribution unit 32. The second signal distribution unit 32 copies the calorific value detection signal into multiple second calorific value distribution signals, and then outputs them one by one through multiple second signal distribution output interfaces 33. The main function of the second signal distribution unit 32 is to copy the calorific value detection signal into multiple second calorific value distribution signals to meet the needs of multiple production lines. One of the multiple second signal distribution output interfaces 33 outputs the second calorific value distribution signal to multiple control modules, such as the second control module 60, thereby meeting the needs of multiple production lines.

[0063] In one embodiment, reference Figure 4 As shown, the signal transmission module 40 includes a signal input unit 41, a signal amplification unit 42, and a signal output unit 43.

[0064] Specifically, the signal input unit 41 is connected to the second signal distribution module 30, and the signal input unit 41 is used to receive the second calorific value distribution signal; the signal amplification unit 42 is connected to the signal input unit 41, and the signal amplification unit 42 is used to amplify the second calorific value distribution signal to generate a calorific value amplified signal; the signal output unit 43 is connected to the signal amplification unit 42, and the signal output unit 43 is used to output the calorific value amplified signal to the second control module 60.

[0065] In this embodiment, the second calorific value allocation signal enters the signal transmission module 40 through the signal input unit 41, is amplified by the signal amplification unit 42, and then outputs through the signal output unit 43. It can be understood that the first calorific value allocation signal is directly output to the control module on the production line closer to the first signal allocation module 20, such as the first control module 50. For production lines farther from the first signal allocation module 20, the first calorific value allocation signal is output to the second signal allocation module 30. The second signal allocation module 30 generates multiple second calorific value allocation signals after replication processing. These second calorific value allocation signals are amplified by the signal transmission module 40 and output to the more distant production lines, thus enabling different production lines to receive either the first or second calorific value allocation signal. This allows different production lines to control the flow rate based on the calorific value of natural gas, reducing resource waste, ensuring more complete combustion of natural gas, and reducing pollutant emissions.

[0066] In this embodiment, the signal transmission module 40 can output the calorific value amplified signal at a maximum distance of 10KM by setting the signal input unit 41, the signal amplification unit 42, and the signal output unit 43. For example, the signal transmission module 40 can output the calorific value amplified signal to the second control module 10 kilometers away.

[0067] In one embodiment, the signal transmission module 40 outputs the second calorific value allocation signal at a frequency of 234.375 and a rate of 1200, averaging once every 1.5 seconds to the second control module 60, with a cycle of 60 seconds. The same second calorific value allocation signal is output to the second control module 60 in each cycle. After one cycle, a new second calorific value allocation signal is output to the second control module 60. If no new second calorific value allocation signal is output to the second control module 60 after one cycle, it indicates a communication failure in the signal transmission module 40. By setting the frequency, rate, and transmission cycle of the signal transmission module 40, the second calorific value allocation signal output by the signal transmission module 40 can be generated based on the real-time detected calorific value of the natural gas, ensuring the accuracy of the second calorific value allocation signal.

[0068] In one embodiment, reference Figure 5As shown, the calorific value detection module 10 is an OHC-800 natural gas calorific value meter. The output pins 6 and 7 of the OHC-800 natural gas calorific value meter output the calorific value detection signal to pins 3 and 4 of the first signal distribution module 20. Pin 1 of the first signal distribution module 20 is a power input pin, used to connect to a 24V, 10A power supply. Pin 2 of the first signal distribution module 20 is grounded. The output pins 5 and 6 of the first signal distribution module 20 are connected to the first control module 50. The output pins 7 and 8 of the first signal distribution module 20 are connected to the second signal distribution module 30. The output pins 9 and 10 of the first signal distribution module 20 are spare pins, which can be connected to another first control module 50 or another second signal distribution module 30 as needed.

[0069] In one embodiment, reference Figure 6 As shown, the second signal distribution module 30 has the same structure as the first signal distribution module 20. Specifically, pins 3 and 4 of the second signal distribution module 30 are connected to the output pins 7 and 8 of the first signal distribution module 20. Pin 1 of the second signal distribution module 30 is a power input pin used to connect to a 24V, 10A power supply. Pin 2 of the second signal distribution module 30 is grounded. The output pins 5 and 6, pins 7 and 8, and pins 9 and 10 of the second signal distribution module 30 are connected to the second control module 60.

[0070] In one embodiment, reference Figure 7 As shown, the signal transmission module 40 includes a signal input unit 41, a signal amplification unit 42, and a signal output unit 43. Specifically, the signal input unit 41 includes a first resistor R1. The signal amplification unit 42 includes a signal amplification chip U1. The first resistor R1 is connected in parallel with the signal amplification unit 42 and is used to filter the second heat value distribution signal. Specifically, the first end of the first resistor R1 is connected to the VIN0- pin of the signal amplification chip U1, and the second end of the first resistor R1 is connected to the VIN0+ pin of the signal amplification chip U1. The GND pin of the signal amplification chip U1 is grounded, and the +VS pin of the signal amplification chip U1 is connected to the 12V first power supply interface JP1. The signal output unit 43 includes an output serial port JP2. Specifically, the DATA+ pin of the signal amplifier chip U1 is connected to the A / RX pin of the output serial port JP2, the DATA- pin of the signal amplifier chip U1 is connected to the B / TX pin of the output serial port JP2, the GND pin of the output serial port JP2 is grounded, the 12V pin of the output serial port JP2 is connected to the 12V first power supply interface JP1, and the other pins of the signal amplifier chip U1 are left floating.

[0071] In one embodiment, reference Figure 7 , Figure 8As shown, the first control module 50 and the second control module 60 have the same structure. Specifically, the first decoding unit includes: an input interface JP3, a power interface JP4, and a decoding chip U2. Specifically, the input interface JP3 and the output serial port JP2 are connected one-to-one. For example, the RXD pin of the input interface JP3 is connected to the A / RX pin of the output serial port JP2, the TXD pin of the input interface JP3 is connected to the B / TX pin of the output serial port JP2, the GND pin of the input interface JP3 is grounded, the 12V pin of the input interface JP3 is connected to the 12V power supply JP4, the GND pin of the 12V power supply JP4 is grounded, the RXD pin of the input interface JP3 is connected to the DATA+ pin of the decoding chip U2, the TXD pin of the input interface JP3 is connected to the DATA- pin of the decoding chip U2, the +VS pin of the decoding chip U2 is connected to the 12V power supply JP4, and the GND pin of the decoding chip U2 is grounded. Pins -IOUT1 and +IOUT1, as well as pins -IOUT2 ​​and +IOUT2 ​​in the decoding chip U2, are used to output the corresponding first thermal value decoding signal, while the other pins in the decoding chip U2 are left floating.

[0072] This application embodiment also provides a natural gas flow regulating device, including: a kiln, and further including: a natural gas flow monitoring circuit as described above; a first control module 50 connected to a first signal distribution module 20, the first control module 50 being used to receive a first calorific value distribution signal and generate a first flow release signal according to the first calorific value distribution signal to control the magnitude of the natural gas flow in the corresponding kiln; a second control module 60 connected to a second signal distribution module 30, the second control module 60 being used to receive a second calorific value distribution signal and generate a second flow release signal according to the second calorific value distribution signal to control the magnitude of the natural gas flow in the corresponding kiln.

[0073] In this embodiment, the first control module 50 is connected to the first signal distribution module 20 and the kiln. The first control module 50 receives a first calorific value distribution signal and generates a first flow release signal based on the first calorific value distribution signal to control the natural gas flow rate in the corresponding kiln. The second control module 60 is connected to the second signal distribution module 30 and the corresponding kiln. The second control module 60 receives a second calorific value distribution signal and generates a second flow release signal based on the second calorific value distribution signal to control the natural gas flow rate in the corresponding kiln. By setting the first control module 50 and the second control module 60, the corresponding calorific value distribution signals can be received, and the natural gas flow rate in the corresponding kiln can be controlled according to the corresponding calorific value distribution signals, reducing resource waste, making natural gas combustion more complete, and reducing the emission of polluting gases.

[0074] In one embodiment, the first control module 50 includes a first decoding unit and a first control unit.

[0075] Specifically, the first decoding unit is connected to the first signal distribution module 20. The first decoding unit is used to receive the first calorific value distribution signal, decode the first calorific value distribution signal, generate the first calorific value decoding signal, and output it. The first control unit is connected to the first decoding unit. The first control unit is used to receive the first calorific value decoding signal and generate the first flow release signal according to the first calorific value decoding signal to control the magnitude of the natural gas flow in the corresponding kiln.

[0076] In this embodiment, the first decoding unit receives and decodes the first calorific value allocation signal. Since the first calorific value allocation signal undergoes encoding before being output to the first control module 50, the first control module 50 decodes it upon receipt to generate a signal recognizable by the first control unit—the first calorific value decoding signal. The first control unit is connected to the first decoding unit and the kiln, and receives the first calorific value decoding signal. It then calculates the first flow release signal based on the first calorific value decoding signal and sends it to the corresponding kiln to control the natural gas flow rate in the kiln. This allows the natural gas flow rate in the kiln to be adjusted according to the first flow release signal.

[0077] Furthermore, the second control module 60 has the same structure as the first control module 50. It can be understood that the second control module 60 also includes a second decoding unit and a second control unit. Specifically, the second decoding unit is connected to the signal transmission module 40, and is used to receive the second calorific value allocation signal, decode the signal, generate a second calorific value decoded signal, and output it. The second control unit is connected to the second decoding unit, and is used to receive the second calorific value decoded signal and generate a second flow release signal based on it to control the flow rate of natural gas in the corresponding kiln.

[0078] In a specific application, the second decoding unit receives and decodes the second calorific value allocation signal. Because the second calorific value allocation signal undergoes encoding before being output to the second control module 60, the second control module 60 decodes it upon receipt to generate a signal recognizable by the second control unit—the second calorific value decoding signal. The second control unit, connected to the second decoding unit and the kiln, receives the second calorific value decoding signal and calculates the second flow release signal based on it, sending it to the corresponding kiln to control the natural gas flow rate within the kiln. This allows the natural gas flow rate in the kiln to be adjusted according to the second flow release signal.

[0079] In one embodiment, the first decoding unit outputs a first thermal value decoding signal at a first frequency and maintains the same first thermal value decoding signal within a first time threshold. If the first time threshold is exceeded, the first thermal value decoding signal is refreshed and output.

[0080] Specifically, the first decoding unit stably outputs a fixed first calorific value decoding signal within a first time threshold. This means that the first calorific value decoding signal output at a first frequency within the first time threshold is the same. Then, when the first time threshold is exceeded, the first calorific value decoding signal is refreshed, and the refreshed first calorific value decoding signal is output again within the first time threshold. In this embodiment, by outputting a constant first calorific value decoding signal within a certain time period (e.g., within the first time threshold), the natural gas flow regulating device can be made more stable, avoiding frequent adjustments to the natural gas flow rate and thus extending its service life.

[0081] In one embodiment, the first decoding unit outputs a first calorific value allocation signal at a frequency of 234.375 and a rate of 1200, averaging once every 1.5 seconds to the first control module 50. Each cycle lasts 60 seconds, and the same first calorific value allocation signal is output to the first control module 50 in each cycle. After one cycle, a new first calorific value allocation signal is output to the first control module 50. If no new first calorific value allocation signal is output to the first control module 50 after one cycle, it indicates a communication failure in the signal transmission module 40. By setting the frequency, rate, and transmission cycle of the signal transmission module 40, the first calorific value allocation signal output by the signal transmission module 40 can be generated based on the real-time detected calorific value of the natural gas, ensuring the accuracy of the first calorific value allocation signal.

[0082] In one embodiment, if the first decoding unit fails to refresh the first heat value decoding signal for more than a first time threshold, it continues to output the first heat value decoding signal before the refresh and outputs a heat value alarm signal.

[0083] In this embodiment, when the first calorific value decoding unit exceeds a first time threshold, such as failing to refresh the first calorific value decoding signal for more than 60 seconds, or when a refresh failure occurs, such as the refreshed first calorific value decoding signal significantly exceeding its range, the unit continues to output the original first calorific value decoding signal and outputs a calorific value alarm signal to notify personnel to check the fault. This operation ensures that the first control unit receives the correct real-time first calorific value decoding signal, enabling it to promptly receive the signal and calculate the first flow release signal, which is then sent to the corresponding kiln to control the natural gas flow rate within the kiln. Thus, the natural gas flow rate within the kiln can be adjusted according to the first flow release signal.

[0084] In one embodiment, the natural gas flow regulating device further includes an alarm module, which, together with a first decoding unit, is used to receive a calorific value alarm signal and trigger an alarm based on the calorific value alarm signal.

[0085] In this embodiment, when the first thermal value decoding unit exceeds a first time threshold, such as failing to refresh the first thermal value decoding signal for more than 60 seconds, or when a refresh failure occurs, such as the refreshed first thermal value decoding signal significantly exceeding the range of the first thermal value decoding signal, the unit continues to output the first thermal value decoding signal before the refresh and outputs a thermal value alarm signal to notify personnel to perform fault inspection. The alarm module may include a buzzer alarm and RGB tri-color lights. When the alarm module receives the thermal value alarm signal, the buzzer alarm sounds, and the red light in the RGB tri-color lights illuminates to remind personnel to perform fault inspection.

[0086] In one embodiment, the first control unit calculates the first flow release signal according to a first calculation formula;

[0087] The first calculation formula is:

[0088]

[0089] Wherein, A is the first flow release signal, B is the preset kiln flow value, C is the preset standard natural gas calorific value, and D is the first calorific value decoding signal.

[0090] Specifically, in one application, the preset kiln flow rate is 1000 m³ / h. 3 / H, preset standard natural gas calorific value 38MJ / NM 3 The first calorific value decoded signal is 38.2 MJ / NM. 3 Therefore, the first flow release signal calculated according to the first calculation formula is 995 NM. 3 Conversely, if the calorific value of natural gas is not involved in the regulation, the first calorific value decoding signal is 38.2 MJ / NM.3 Replace with the actual value of 37.7 MJ / NM. 3 The flow rate is 1008 NM. 3 Compared to using the calorific value of natural gas to regulate flow rate, this method wastes a significant amount of natural gas, resulting in resource waste. Furthermore, excessive natural gas may cause incomplete combustion, thereby polluting the environment.

[0091] In one embodiment, the method by which the first control unit controls the flow rate of natural gas entering the kiln according to the first flow release signal is any one of manual control, automatic control, and cascade control.

[0092] Specifically, manual control involves manually controlling the flow rate of natural gas entering the kiln based on the first flow release signal. This requires staff to monitor the first flow release signal in real time. Automatic control, on the other hand, uses a controller to control the flow rate of natural gas entering the kiln based on the first flow release signal, significantly reducing labor costs. Cascade control uses a controller to control the flow rate of natural gas entering the kiln based on the first flow release signal, while simultaneously controlling the flow rate of combustion aids such as air entering the kiln. Cascade control makes the natural gas flow regulation device more intelligent, reduces labor costs, significantly reduces natural gas waste, reduces resource waste, and avoids environmental pollution.

[0093] In the above embodiments, the descriptions of each embodiment have different focuses. For parts that are not described in detail or recorded in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0094] In the embodiments provided in this application, it should be understood that the disclosed apparatus / terminal devices and methods can be implemented in other ways. For example, the apparatus / terminal device embodiments described above are merely illustrative. For instance, the division of modules or units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection between the displayed data or discussed mutuals may be through some interfaces; the indirect coupling or communication connection between devices or units may be electrical, mechanical, or other forms.

[0095] The units described as separate components may or may not be physically separate. The components that display data may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment, depending on actual needs.

[0096] The above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be included within the protection scope of this application.

Claims

1. A natural gas flow regulating device, comprising: The kiln, characterized in that it further includes: Natural gas flow monitoring circuit; the natural gas flow monitoring circuit includes: The calorific value detection module is installed inside the main natural gas pipeline to detect the calorific value of natural gas and generate a calorific value detection signal. A first signal distribution module, connected to the calorific value detection module, is used to receive the calorific value detection signal and generate multiple first calorific value distribution signals based on the calorific value detection signal, one of which is output to a first control module; the first control module is used to control the flow rate of natural gas in a production line that is closer to the first signal distribution module. The second signal distribution module, connected to the first signal distribution module, is used to receive the first calorific value distribution signal and generate multiple second calorific value distribution signals based on the first calorific value distribution signal; the signal transmission module, connected to the second signal distribution module, is used to connect the received second calorific value distribution signal in parallel with a 120-ohm resistor and then process it through radio power amplification to generate a calorific value amplified signal, and output the calorific value amplified signal to the second control module; the second control module is used to control the flow rate of natural gas in a production line that is far away from the second signal distribution module; The first control module, connected to the first signal distribution module, is used to receive the first calorific value distribution signal and generate a first flow release signal according to the first calorific value distribution signal, so as to control the magnitude of the natural gas flow in the corresponding kiln. The second control module, connected to the second signal distribution module, is used to receive the second calorific value distribution signal and generate a second flow release signal according to the second calorific value distribution signal, so as to control the magnitude of the natural gas flow in the corresponding kiln. The first control module includes: The first decoding unit is connected to the first signal allocation module and is used to receive the first heat value allocation signal, decode the first heat value allocation signal, generate a first heat value decoding signal and output it. The first control unit is connected to the first decoding unit and is used to receive the first calorific value decoding signal and generate the first flow release signal according to the first calorific value decoding signal to control the magnitude of the natural gas flow in the corresponding kiln. The first control unit calculates the first flow release signal according to the first calculation formula; The first calculation formula is: ； Wherein, A is the first flow release signal, B is the preset flow value of the kiln, C is the preset standard natural gas calorific value, and D is the first calorific value decoding signal.

2. The natural gas flow regulating device as described in claim 1, characterized in that, The calorific value detection module is a natural gas calorific value meter.

3. The natural gas flow regulating device as described in claim 2, characterized in that, The natural gas calorimeter is model OHC-800.

4. The natural gas flow regulating device as described in claim 1, characterized in that, The first signal allocation module includes: The first signal distribution input interface is connected to the calorific value detection module and is used to receive the calorific value detection signal; The first signal distribution unit is connected to the first signal distribution input interface and is used to perform copy distribution processing on the calorific value detection signal to generate multiple first calorific value distribution signals. Multiple first signal distribution output interfaces are provided, each of which is connected to the first signal distribution unit to output the multiple first heat value distribution signals one by one.

5. The natural gas flow regulating device as described in claim 1, characterized in that, The signal transmission module includes: A signal input unit, connected to the second signal distribution module, is used to receive the second heat value distribution signal; A signal amplification unit, connected to the signal input unit, is used to amplify the second calorific value distribution signal to generate the calorific value amplification signal; A signal output unit, connected to the signal amplification unit, is used to output the calorific value amplification signal to the second control module.

6. The natural gas flow regulating device as described in claim 1, characterized in that, The first decoding unit outputs the first heat value decoding signal at a first frequency, and maintains the same output of the first heat value decoding signal within a first time threshold. If the first time threshold is exceeded, the first heat value decoding signal is refreshed and output.

7. The natural gas flow regulating device as described in claim 6, characterized in that, If the first decoding unit fails to refresh the first heat value decoding signal within the first time threshold, it continues to output the first heat value decoding signal before the refresh and outputs a heat value alarm signal.

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