Adjustable fuel gas odorization system

Abstract

The utility model belongs to the field of fuel gas conveying, and relates to an adjustable fuel gas odorizing system, which comprises an odorizing tank connected with a fuel gas main pipeline through a filling pipeline and used for filling odorant into the fuel gas main pipeline; the regulating valve is arranged on the filling pipeline and is used for regulating the filling amount of the odorant; the detection device comprises an odorant detection sensor and a flow meter, the odorant detection sensor is arranged at the downstream of the gas main pipeline and used for detecting the odorant concentration in the gas main pipeline, and the flow meter is arranged at the upstream of the gas main pipeline and used for detecting the gas amount in the gas main pipeline; the controller is electrically connected with the adjusting valve and the detection device; and the controller is used for controlling the opening degree of the regulating valve according to an electric signal of the detection device. The problems that an odorization system is poor in safety and low in reliability are solved.

Description

Technical Field

[0001] This utility model belongs to the field of gas transmission, and in particular relates to an adjustable gas odorization system. Background Technology

[0002] As a key node in the urban gas transmission and distribution system, the gas gate station is responsible for receiving natural gas from upstream high-pressure pipelines, regulating and metering it, and distributing it to downstream medium- and low-pressure pipelines. To ensure the safe use of gas, odorization devices are installed in the gate station. These devices add strongly odorous chemicals (such as tetrahydrothiophene (THT) or ethanethiol) to odorless or slightly odorless natural gas to facilitate leak detection. By mixing a specific concentration of odorant into the natural gas stream, even minor leaks can be quickly detected, allowing for timely intervention to prevent serious accidents such as explosions.

[0003] Currently, gas-fired odorization systems have several limitations and potential risks: First, flow rate changes occur during odorization, and a fixed odorization ratio may cause the actual odorant concentration to deviate from the standard range; both excessively high and low concentrations can affect safety. Second, the odorization system has poor adaptability, lacking online adjustment capabilities and unable to flexibly adjust parameters based on the actual environment of the gate station and temperature changes, resulting in poor control accuracy. Third, the monitoring function of the odorization system is incomplete, unable to dynamically track various indicators during the odorization process, making it difficult to ensure a continuous and stable odorant concentration and to timely and comprehensively monitor the operation of odorization systems at unattended gate stations. With increasing public concern for the safety of public facilities and increasingly stringent environmental protection requirements, existing odorization systems need further improvement to meet higher safety standards and enhance their accuracy and reliability. Especially in unattended intelligent gate station environments, ensuring the odorization system can operate stably and reliably under various conditions, providing comprehensive monitoring, and responding quickly to abnormal situations has become an urgent problem to be solved. Summary of the Invention

[0004] The technical problem solved by this utility model is to provide an adjustable gas odorization system, which solves the problems of poor safety and low reliability of odorization systems.

[0005] The basic solution provided by this utility model is: an adjustable gas odorization system, comprising:

[0006] Odor-adding tanks are connected to the main gas pipeline via filling pipelines and are used to add odorant to the main gas pipeline;

[0007] A regulating valve, installed on the injection pipeline, is used to regulate the injection volume of the odorant;

[0008] The detection device includes an odorant detection sensor and a flow meter. The odorant detection sensor is located downstream of the main gas pipeline and is used to detect the odorant concentration in the main gas pipeline. The flow meter is located upstream of the main gas pipeline and is used to detect the gas flow rate in the main gas pipeline.

[0009] The controller is electrically connected to both the regulating valve and the detection device; the controller is used to control the opening degree of the regulating valve according to the electrical signal from the detection device.

[0010] The principle and advantages of this invention are as follows: By installing an odorant detection sensor downstream of the main gas pipeline, the concentration of odorant in the gas after odorization treatment is monitored in real time, and the concentration of odorant in the gas is fed back in real time. The controller can adjust the opening of the regulating valve in a timely manner according to the actual situation to ensure that the odorant concentration always meets the preset standard, avoiding over- or under-addition of odorant and ensuring the accuracy and stability of gas odorization. By installing a flow meter upstream of the main gas pipeline to accurately measure the flow rate of gas in the pipeline, the system can dynamically adjust the amount of odorant added according to the actual gas flow rate. When the gas flow rate is high, the amount of odorant added is increased; when the gas flow rate is low, the amount of odorant added is reduced accordingly, achieving precise matching between odorant addition and gas flow rate. The setting of the regulating valve allows the system to flexibly adjust the amount of odorant added according to different gas types, flow rates, and users' specific requirements for odorant concentration, adapting to various working conditions and application scenarios. The controller can acquire the current odorant concentration and flow rate data in the gas, calculate the amount of odorant required to reach the preset standard in order to make the odorant concentration in the gas reach the preset standard, and then send a control signal to the regulating valve to adjust the opening of the regulating valve in order to precisely control the flow rate of odorant added from the odorant tank to the main gas pipeline through the filling pipeline, so that the odorant concentration in the gas is always kept within a suitable range.

[0011] The system can automatically complete a series of operations such as odorant concentration detection, preliminary data processing, and control of valve opening, without frequent manual intervention. This greatly reduces errors and workload caused by manual operation and lowers labor costs. The automated operation mode makes the gas odorization process more efficient and smooth, and can quickly respond to changes in gas flow and odorant concentration, adjust the odorization amount in a timely manner, and improve the overall efficiency and quality of gas supply.

[0012] The detection devices and controllers in the system can monitor the entire odorization process in real time. Once an abnormality is detected, such as the odorant concentration continuously deviating from the preset value or the regulating valve malfunctioning, an alarm can be issued in a timely manner to remind staff to carry out maintenance, thereby improving the safety and reliability of the system.

[0013] The system's components, such as odor tanks, regulating valves, and detection devices, have good compatibility and versatility, and can be easily integrated and connected with existing gas supply systems without requiring large-scale modifications to the entire gas system.

[0014] Preferably, the system also includes a backend server and a monitoring terminal. Both the controller and the monitoring terminal are network-connected to the backend server. The controller sends data collected by the detection device to the backend server. The backend server generates operating status information for the odorization system based on the data collected by the detection device. The monitoring terminal retrieves and displays the operating status information of the odorization system from the backend server. By connecting the backend server, controller, and monitoring terminal via the network, the backend server monitors the information collected by the sensors and displays it on the monitoring terminal, allowing staff to fully understand the operating status of the odorization system. The monitoring terminal displays the sensor information sent by the backend server, facilitating staff to monitor the operating status of the odorization system and respond promptly, further improving the reliability and safety of the odorization system.

[0015] Preferably, the detection device further includes a temperature sensor installed on the odorization tank to detect the ambient temperature of the odorization system. By monitoring the ambient temperature of the odorization system, the odorization process is ensured to operate within an optimal working range, thereby improving odorization efficiency and ensuring that the odor is added to the gas at a predetermined ratio, achieving effective odor addition without wasting resources. Simultaneously, monitoring the operating environment of the odorization system helps prevent equipment failures caused by overheating or overcooling, extending the equipment's service life.

[0016] Preferably, the filling pipeline is equipped with a mixer for mixing the odorant and the gas. This ensures the odorant is evenly mixed with the gas before entering the main gas pipeline, preventing corrosion or other damage to the pipeline and other equipment due to excessively high local concentrations of the odorant. This helps extend the service life of various equipment in the gas delivery system and ensures stable system operation. Furthermore, when the gas flow rate changes, the mixer can adaptively mix the odorant and gas, ensuring the odorization effect is unaffected by fluctuations in gas flow rate and guaranteeing the safety of gas use.

[0017] Preferably, the detection device includes an odorant level sensor, installed on the odorant tank, for detecting the odorant level inside the tank. By monitoring the odorant level in the tank in real time, staff can clearly understand the remaining amount of odorant. When the level drops to a certain point, a timely reminder to replenish the odorant can be issued, ensuring that the odorant tank does not stop working due to depletion of odorant. This guarantees the continuous and stable operation of the gas odorization system, avoids odorless gas due to odorant supply interruptions, and reduces safety risks. Simultaneously, staff can rationally schedule the procurement and replenishment of odorant based on the rate and pattern of level decline, improving work efficiency and reducing unnecessary waste of manpower and resources.

[0018] Preferably, the device also includes an alarm, which is electrically connected to a controller. The controller is used to control the alarm to open and close based on signals from the detection device. When the detection device detects abnormal data, the controller can quickly trigger the alarm based on these signals, alerting staff to take timely measures to prevent safety accidents from occurring. Attached Figure Description

[0019] Figure 1 This is a system block diagram of the present invention. Detailed Implementation

[0020] The following detailed description illustrates the specific implementation method:

[0021] The specific implementation process is as follows: (See details) Figure 1 An adjustable gas odorization system, comprising:

[0022] An odorant filling tank is connected to the main gas pipeline via a filling pipeline and is used to add odorant to the main gas pipeline. The filling pipeline is equipped with a mixer for mixing the odorant and the gas. The odorant is tetrahydrothiophene. The odorant filling tank adds odorant to the main gas pipeline using pressure difference or gravity as the filling power. In this embodiment, the odorant filling tank is located higher than the branch pipeline, and the odorant enters the branch pipeline by gravity.

[0023] A regulating valve is installed on the injection pipeline to regulate the injection amount of odorant. The regulating valve is an electric needle valve. In this embodiment, the regulating valve model is J911Y.

[0024] The detection device includes an odorant detection sensor and a flow meter. The odorant detection sensor is located downstream of the main gas pipeline and is used to detect the odorant concentration in the main gas pipeline. The flow meter is located upstream of the main gas pipeline and is used to detect the gas flow rate in the main gas pipeline. The detection device also includes a temperature sensor located on the odorization tank and is used to detect the ambient temperature of the odorization system. The detection device also includes an odorant level sensor located on the odorization tank and is used to detect the odorant level in the odorization tank.

[0025] The controller is electrically connected to both the regulating valve and the detection device. The controller controls the opening degree of the regulating valve based on the electrical signal from the detection device. The controller uses a microcontroller as the main control chip; in this embodiment, a 51 microcontroller is preferred.

[0026] It also includes an alarm, which is electrically connected to a controller. The controller is used to control the alarm to open or close according to the signal from the detection device. The alarm can be a light alarm or an audible alarm.

[0027] It also includes a backend server and a monitoring terminal. Both the controller and the monitoring terminal are connected to the backend server via a network. The controller is used to send the data collected by the detection device to the backend server. The backend server is used to generate odorization system working status information based on the data collected by the detection device. The monitoring terminal is used to obtain and display the odorization system working status information from the backend server.

[0028] The operating status information of the odorization system includes the opening degree of the regulating valve, the amount of gas entering the main gas pipeline, the amount of odorant added, the liquid level of the odorization tank, the ambient temperature of the odorization system, the real-time value and trend of the odorant concentration in the gas after the addition of odorant.

[0029] The backend server is also used to generate low-risk information on the amount of odorant used in the dosing tank based on the odorant level sensor signal. The monitoring terminal issues an alarm message based on the low-risk information, which is either highlighted in color or accompanied by an audible alarm. The backend server sets a threshold for the odorant level in the dosing tank. When the liquid level in the tank detected by the odorant level sensor is lower than the threshold, the backend server generates low-risk information on the amount of odorant used and sends it to the monitoring terminal. The monitoring terminal can be a monitoring center for monitoring multiple gate stations, or a portable terminal for staff, such as a mobile app.

[0030] The backend server generates temperature risk information based on signals monitored by the temperature sensor and sends it to the monitoring terminal. The monitoring terminal then issues an alarm based on this information, either as a highlighted display or an audible alarm. The backend server sets a temperature threshold for the odorization system. When the signal monitored by the temperature sensor exceeds this threshold, temperature risk information is generated. This prevents excessively high or low temperatures from affecting the odorization effect and safety, while ensuring the odorization system operates within a safe temperature range.

[0031] In this embodiment, the preferred model of the odorant level sensor is Siemens Sitrans LUT400, the preferred model of the flow meter is Krohne Optimass 7000, the preferred model of the temperature sensor is DS18B20, and the preferred model of the odorant detection sensor is City Technology TGS2602.

[0032] Working Principle: An odorization tank is installed and connected to a filling pipeline. Odorant in the tank enters the filling pipeline due to pressure difference or gravity, odorizing the gas entering the main gas pipeline. A regulating valve on the filling pipeline controls the odorization amount. A flow meter monitors the gas flow rate before odorization, and the controller calculates the target odorization amount based on the flow meter signal. Automatic odorization is achieved by controlling the regulating valve. The odorization amount varies with the gas flow rate into the main gas pipeline, ensuring the odorant level in the gas remains within specified requirements, guaranteeing stable and reliable odorization. Furthermore, an odorant detection sensor is installed downstream of the main gas pipeline to monitor the odorant level after odorization. The controller regulates the concentration of the odorant by adjusting the regulating valve in a timely manner when the concentration is too high or too low, further improving the reliability of the odorization system. Odorant level and temperature sensors monitor the dosage of odorant in the tank and the ambient temperature, respectively, ensuring the safe operation of the odorization system. The backend server processes the information collected by the sensors, generates risk information, and then generates alarm information to remind staff to take appropriate measures in a timely manner to ensure the safety of the odorization system. In addition, the monitoring terminal displays the collected information, allowing staff to fully understand the working status of the odorization system and facilitating management.

[0033] The above are merely embodiments of this utility model, and the utility model is not limited to the field covered by this embodiment. Commonly known structures and characteristics in the solutions are not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the structure of this utility model, and these should also be considered within the scope of protection of this utility model. These modifications will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. An adjustable gas odorization system, characterized in that: include: Odor-adding tanks are connected to the main gas pipeline via filling pipelines and are used to add odorant to the main gas pipeline; A regulating valve, installed on the injection pipeline, is used to regulate the injection volume of the odorant; The detection device includes an odorant detection sensor and a flow meter. The odorant detection sensor is located downstream of the main gas pipeline and is used to detect the odorant concentration in the main gas pipeline. The flow meter is located upstream of the main gas pipeline and is used to detect the gas flow rate in the main gas pipeline. The controller is electrically connected to both the regulating valve and the detection device; the controller is used to control the opening degree of the regulating valve according to the electrical signal from the detection device.

2. The adjustable gas odorization system according to claim 1, characterized in that: It also includes a backend server and a monitoring terminal. Both the controller and the monitoring terminal are connected to the backend server via a network. The controller is used to send the data collected by the detection device to the backend server. The backend server is used to generate odorization system working status information based on the data collected by the detection device. The monitoring terminal is used to obtain and display the odorization system working status information from the backend server.

3. The adjustable gas odorization system according to claim 1, characterized in that: The detection device also includes a temperature sensor, which is installed on the odorization tank to detect the ambient temperature of the odorization system.

4. The adjustable gas odorization system according to claim 1, characterized in that: The filling pipeline is equipped with a mixer for mixing the odorant and the fuel gas.

5. The adjustable gas odorization system according to claim 1, characterized in that: The detection device includes an odorant level sensor, which is installed on the odorant tank to detect the odorant level inside the tank.

6. The adjustable gas odorization system according to claim 1, characterized in that: It also includes an alarm, which is electrically connected to a controller, which controls the alarm to open or close based on a signal from the detection device.

7. The adjustable gas odorization system according to claim 1, characterized in that: The odorizing tank injects odorant into the gas main pipe using pressure difference or gravity as the injection power.

8. The adjustable gas odorization system according to claim 1, characterized in that: The regulating valve is an electric needle valve.

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