CN114963000A - Intelligent natural gas odorization control system and control method - Google Patents

Abstract

The invention discloses an intelligent natural gas odorization control system and a control method, wherein the intelligent natural gas odorization control system comprises a PLC (programmable logic controller) control module, a data acquisition module, a calculation module and an odorization module; the odorizing module consists of an odorizing pump, an odorizing agent storage tank and a natural gas pipeline, and the calculating module comprises an upper computer and an odorizing agent accurate feeding algorithm module carried on the upper computer; the PLC control module is electrically connected with the upper computer and the odorizing pump. The invention can adjust the filling speed in real time according to the content of the odorizing agent at the tail end of the natural gas pipeline, thereby ensuring the instantaneity of the instrument, and further ensuring that the concentration of the odorizing agent continuously reaches the national standard without waste; the invention has high control accuracy, avoids the phenomenon that odorizing agent in the natural gas is excessive and harmful gases such as carbon monoxide, hydrogen sulfide, sulfur oxide and the like can be generated after incomplete combustion, and ensures the use safety of the natural gas.

Description

Translated fromChinese

一种智慧化天然气加臭控制系统及控制方法A kind of intelligent natural gas odorization control system and control method

技术领域technical field

本发明涉及智能化加臭技术领域，具体涉及一种智慧化天然气加臭控制系统及控制方法。The invention relates to the technical field of intelligent odorization, in particular to an intelligent natural gas odorization control system and a control method.

背景技术Background technique

在天然气行业中，加臭是必不可少的部分。加臭剂是一类含硫或无硫的具有刺激性警示气味的气体，通常用于对泄漏燃气起警示作用。但加臭剂用量在应用中由于不能精确控制，存在明显不足。加臭剂浓度较低时，不能在燃气泄漏时起警示作用，加臭剂浓度较高时，不仅会让使用天然气人员感到不适，而且会造成经济浪费，影响企业成本。通常，天然气加臭装置采用闭环加臭模式，控制器通过对加臭剂的输出量与实际浓度做对比，调整参数，从而保证天然气中加臭剂浓度达到国家标准。In the natural gas industry, odorization is an essential part. Odorants are a class of sulfur-containing or sulfur-free gases with a pungent warning odor, usually used to warn of gas leaks. However, the dosage of odorant is obviously insufficient because it cannot be precisely controlled in application. When the concentration of odorant is low, it cannot act as a warning when gas leaks. When the concentration of odorant is high, it will not only make natural gas users feel uncomfortable, but also cause economic waste and affect the cost of enterprises. Usually, the natural gas odorizing device adopts the closed-loop odorizing mode, and the controller adjusts the parameters by comparing the output of the odorant with the actual concentration, so as to ensure that the concentration of the odorant in the natural gas reaches the national standard.

现目前，现有技术中也有通过补偿执行机构控制加臭机对天然气管道中加臭剂浓度进行补偿。但现有技术中未考虑到温度、压力等参数，只通过单一流量以及天然气管道中加臭剂浓度作为参补，在算法上不够全面，在这种控制方式下，系统不能特别准确的注入加臭剂浓度，从而无法保证实时精确控制天然气官网末端实际的加臭剂浓度达到国家标准。浓度低会造成天然气用户存在天然气泄漏未查觉安全隐患，浓度高会增加企业运营成本，造成资源浪费。At present, in the prior art, the odorizer is controlled by the compensation actuator to compensate the concentration of the odorant in the natural gas pipeline. However, parameters such as temperature and pressure are not considered in the prior art, and only a single flow rate and the concentration of odorant in the natural gas pipeline are used as parameters, which is not comprehensive enough in algorithm. Therefore, it is impossible to ensure real-time and precise control of the actual odorant concentration at the end of the natural gas plant to meet the national standard. Low concentration will cause natural gas users to have natural gas leakage and fail to detect potential safety hazards, while high concentration will increase the operating cost of enterprises and cause waste of resources.

发明内容SUMMARY OF THE INVENTION

为解决现有技术中存在的问题，本发明提供了一种智慧化天然气加臭控制系统及控制方法，通过考虑多方面参数包括温度、压力、流量等，能实时精确控制天然气管网末端实际的加臭剂浓度达到国家标准，解决了上述背景技术中提到的问题。In order to solve the problems existing in the prior art, the present invention provides an intelligent natural gas odorization control system and control method. By considering various parameters including temperature, pressure, flow rate, etc., it can accurately control the actual situation at the end of the natural gas pipeline network in real time. The concentration of the odorant reaches the national standard, which solves the problems mentioned in the above background technology.

为实现上述目的，本发明提供如下技术方案：一种智慧化天然气加臭控制系统，所述控制系统包括PLC控制模块(2)、数据采集模块、计算模块、加臭模块；所述加臭模块由加臭泵(3)、加臭剂存储罐和天然气管道(5)构成，所述的计算模块包括上位机(1)及上位机上搭载的加臭剂精准投放算法模块；所述PLC控制模块(2)与上位机(1)电气连接，所述PLC控制模块将数据采集模块采集的信号数据发送给上位机，上位机上搭载的加臭剂精准投放算法模块开始计算，上位机将计算后得到的加注速度指令发送给PLC控制模块；所述PLC控制模块与加臭泵电气连接，将加注速度指令发送至加臭泵。In order to achieve the above purpose, the present invention provides the following technical solutions: an intelligent natural gas odorization control system, the control system includes a PLC control module (2), a data acquisition module, a calculation module, and an odorization module; the odorization module It consists of an odorant pump (3), an odorant storage tank and a natural gas pipeline (5), and the calculation module includes a host computer (1) and an odorant precise delivery algorithm module mounted on the host computer; the PLC control module (2) It is electrically connected with the host computer (1), the PLC control module sends the signal data collected by the data acquisition module to the host computer, and the odorant precise delivery algorithm module mounted on the host computer starts to calculate, and the host computer obtains after calculation The filling speed command of the odorant is sent to the PLC control module; the PLC control module is electrically connected with the odorizing pump, and sends the filling speed command to the odorizing pump.

优选的，所述的数据采集模块包括用于采集温度信号的温度变送器(4)、用于采集压力信号的压力变送器(6)、用于采集流量信号的流量变送器(7)和用于采集天然气管道末端加臭剂浓度的加臭剂浓度检测装置(8)。Preferably, the data acquisition module includes a temperature transmitter (4) for acquiring temperature signals, a pressure transmitter (6) for acquiring pressure signals, and a flow transmitter (7) for acquiring flow signals ) and an odorant concentration detection device (8) for collecting the odorant concentration at the end of a natural gas pipeline.

优选的，所述数据采集模块中的温度变送器、压力变送器、流量变送器均设置在天然气管道中，用于采集对应的数据信号。Preferably, the temperature transmitter, the pressure transmitter, and the flow transmitter in the data acquisition module are all set in the natural gas pipeline for collecting corresponding data signals.

优选的，所述的加臭剂浓度检测装置设置于天然气管道的末端，采集天然气管道末端加臭剂的实际浓度。Preferably, the odorant concentration detection device is arranged at the end of the natural gas pipeline to collect the actual concentration of the odorant at the end of the natural gas pipeline.

优选的，所述的PLC控制模块包括温度信号输入端、压力信号输入端、流量信号输入端以及加臭剂浓度信号输入端；所述PLC控制模块的温度信号输入端与温度变送器相连，所述压力信号输入端与压力变送器相连，所述流量信号输入端与流量变送器相连，所述加臭剂浓度信号输入端与加臭剂浓度检测装置相连。Preferably, the PLC control module includes a temperature signal input end, a pressure signal input end, a flow signal input end and an odorant concentration signal input end; the temperature signal input end of the PLC control module is connected to a temperature transmitter, The pressure signal input end is connected with the pressure transmitter, the flow signal input end is connected with the flow transmitter, and the odorant concentration signal input end is connected with the odorant concentration detection device.

另外，为实现上述目的，本发明还提供如下技术方案：一种智慧化天然气加臭控制系统的控制方法，包括如下步骤：In addition, in order to achieve the above purpose, the present invention also provides the following technical solutions: a control method for an intelligent natural gas odorizing control system, comprising the following steps:

S1、通过数据采集模块采集对应的数据；S1. Collect corresponding data through a data acquisition module;

S2、数据采集模块将采集的数据传递至PLC控制模块；S2. The data acquisition module transmits the collected data to the PLC control module;

S3、PLC控制模块将数据发送给上位机；S3. The PLC control module sends the data to the upper computer;

S4、在上位机界面输入当前加臭设备中的加臭剂密度、当前天然气管道管径、当前目标加臭剂浓度；S4. Input the odorant density in the current odorizing equipment, the current natural gas pipeline diameter, and the current target odorant concentration on the host computer interface;

S5、上位机上搭载的加臭剂精准投放算法模块开始计算，计算得到加注速度；S5. The odorant precise delivery algorithm module mounted on the host computer starts to calculate, and the filling speed is calculated;

S6、上位机通过PLC控制模块电气连接，将加注速度指令传输至PLC控制模块；S6. The host computer is electrically connected through the PLC control module, and transmits the filling speed command to the PLC control module;

S7、PLC控制模块将接收到的加注速度指令发送给加臭泵，加臭泵按照接收到的加注速度开始工作；S7. The PLC control module sends the received filling speed instruction to the odorizing pump, and the odorizing pump starts to work according to the received filling speed;

S8、通过加臭剂浓度检测装置获取天然气管道末端加臭剂的实际浓度；S8. Obtain the actual concentration of the odorant at the end of the natural gas pipeline through the odorant concentration detection device;

S9、若检测到的天然气管道末端加臭剂实际浓度与目标加臭剂浓度不一致，则通过比例系数调整上位机中目标加臭剂浓度数值，获得K值，通过K值修正步骤S5中的加注速度，控制系统重新按照步骤S5-S7开始工作。S9. If the detected actual concentration of the odorant at the end of the natural gas pipeline is inconsistent with the target odorant concentration, adjust the target odorant concentration value in the upper computer through the proportional coefficient to obtain the K value, and correct the addition in step S5 by the K value. Note the speed, and the control system starts to work again according to steps S5-S7.

优选的，所述步骤S1中通过数据采集模块采集对应的数据具体是指：通过温度变送器采集天然气管道中的温度值；通过压力变送器采集天然气管道中的压力值；通过流量变送器采集天然气管道中的流量值。Preferably, collecting the corresponding data through the data acquisition module in the step S1 specifically refers to: collecting the temperature value in the natural gas pipeline through a temperature transmitter; collecting the pressure value in the natural gas pipeline through a pressure transmitter; The device collects the flow value in the natural gas pipeline.

优选的，所述步骤S9中的比例系数具体是天然气管道末端加臭剂实际浓度与目标加臭剂浓度的偏差；所述的K值＝目标加臭剂浓度/天然气管道末端加臭剂实际浓度。Preferably, the proportional coefficient in the step S9 is specifically the deviation between the actual concentration of the odorant at the end of the natural gas pipeline and the target odorant concentration; the K value = the target odorant concentration/the actual concentration of the odorant at the end of the natural gas pipeline .

优选的，所述步骤S9中通过K值修正步骤S5中的加注速度具体是：将步骤S5的加注速度乘以K值，得到修正后的加注速度。Preferably, the correction of the filling speed in the step S5 by the K value in the step S9 is specifically: multiplying the filling speed in the step S5 by the K value to obtain the corrected filling speed.

本发明的有益效果是：The beneficial effects of the present invention are:

1)本发明的天然气加臭控制系统具有温度、压力、流量数据采集装置，上位机通过搭载算法计算出加臭机加注速度传递给PLC控制模块，PLC控制模块再传递给加臭泵，从而实现天然气精准加臭系统中算法的应用，精准控制末端加臭剂浓度，从实现控制天然气管道末端加臭剂浓度达到国家标准，并保证天然气中加臭剂混合均匀；1) The natural gas odorizing control system of the present invention has a temperature, pressure, and flow data acquisition device, and the upper computer calculates the odorizing machine filling speed through the carrying algorithm and transmits it to the PLC control module, and the PLC control module transmits it to the odorizing pump, thereby. Realize the application of the algorithm in the natural gas precise odorization system, precisely control the concentration of the odorant at the end of the natural gas pipeline, and ensure that the concentration of the odorant at the end of the natural gas pipeline reaches the national standard, and ensure that the odorant in the natural gas is mixed evenly;

2)本发明可根据天然气管道末端加臭剂含量实时调整加注速度，从而保证仪器的实时性，从而从而让加臭剂浓度持续达到在国家标准之上且不浪费；2) The present invention can adjust the filling speed in real time according to the content of the odorant at the end of the natural gas pipeline, thereby ensuring the real-time performance of the instrument, so that the concentration of the odorant can continue to reach above the national standard without waste;

3)本发明的控制精确度高，避免了天然气中的加臭剂过量，在不完全燃烧之后会产生一氧化碳、硫化氢、氧化硫等有害气体，保证了天然气的使用安全性。3) The control accuracy of the present invention is high, avoids excessive odorant in natural gas, and produces harmful gases such as carbon monoxide, hydrogen sulfide, sulfur oxide after incomplete combustion, and ensures the use safety of natural gas.

附图说明Description of drawings

图1为本发明系统结构框架示意图；1 is a schematic diagram of the system structure framework of the present invention;

图2为本发明控制方法步骤原理示意图；Fig. 2 is the schematic diagram of the step principle of the control method of the present invention;

图中，1-上位机；2-PLC控制模块；3-加臭泵；4-温度变送器；5-天然气管道；6-压力变送器；7-流量变送器；8-加臭剂浓度检测装置。In the figure, 1-host computer; 2-PLC control module; 3-odorization pump; 4-temperature transmitter; 5-natural gas pipeline; 6-pressure transmitter; 7-flow transmitter; 8-odorization Dosage concentration detection device.

具体实施方式Detailed ways

下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

请参阅图1-图2，本发明提供一种技术方案：一种智慧化天然气加臭控制系统，如图1所示，所述控制系统包括PLC控制模块2、数据采集模块、计算模块、加臭模块；1-2, the present invention provides a technical solution: an intelligent natural gas odorization control system, as shown in FIG. 1, the control system includes a PLC control module 2, a data acquisition module, a calculation module, a smelly module;

所述加臭模块由加臭泵3、加臭剂存储罐和天然气管道5构成，The odorizing module is composed of anodorizing pump 3, an odorant storage tank and anatural gas pipeline 5,

所述的计算模块包括上位机1及上位机上搭载的加臭剂精准投放算法模块；The computing module includes the host computer 1 and the odorant precise delivery algorithm module mounted on the host computer;

所述PLC控制模块2与上位机1电气连接，所述PLC控制模块将数据采集模块采集的信号数据发送给上位机，上位机上搭载的加臭剂精准投放算法模块开始计算，上位机将计算后得到的加注速度指令发送给PLC控制模块；所述PLC控制模块与加臭泵电气连接，将加注速度指令发送至加臭泵。The PLC control module 2 is electrically connected with the host computer 1, and the PLC control module sends the signal data collected by the data acquisition module to the host computer. The obtained filling speed instruction is sent to the PLC control module; the PLC control module is electrically connected with the odorizing pump, and sends the filling speed instruction to the odorizing pump.

进一步的，所述的数据采集模块包括用于采集温度信号的温度变送器4、用于采集压力信号的压力变送器6、用于采集流量信号的流量变送器7和用于采集天然气管道末端加臭剂浓度的加臭剂浓度检测装置8。Further, the data acquisition module includes atemperature transmitter 4 for acquiring temperature signals, a pressure transmitter 6 for acquiring pressure signals, a flow transmitter 7 for acquiring flow signals, and a flow transmitter 7 for acquiring natural gas. The odorantconcentration detection device 8 of the odorant concentration at the end of the pipeline.

进一步的，所述数据采集模块中的温度变送器、压力变送器、流量变送器均设置在天然气管道中，用于采集对应的数据信号。Further, the temperature transmitter, the pressure transmitter and the flow transmitter in the data acquisition module are all set in the natural gas pipeline for collecting corresponding data signals.

加臭剂浓度检测装置设置于天然气管道的末端，采集天然气管道末端加臭剂的实际浓度。The odorant concentration detection device is arranged at the end of the natural gas pipeline to collect the actual concentration of the odorant at the end of the natural gas pipeline.

进一步的，所述的PLC控制模块包括温度信号输入端、压力信号输入端、流量信号输入端以及加臭剂浓度信号输入端；所述PLC控制模块的温度信号输入端与温度变送器相连，所述压力信号输入端与压力变送器相连，所述流量信号输入端与流量变送器相连，所述加臭剂浓度信号输入端与加臭剂浓度检测装置相连。Further, the PLC control module includes a temperature signal input end, a pressure signal input end, a flow signal input end and an odorant concentration signal input end; the temperature signal input end of the PLC control module is connected with a temperature transmitter, The pressure signal input end is connected with the pressure transmitter, the flow signal input end is connected with the flow transmitter, and the odorant concentration signal input end is connected with the odorant concentration detection device.

一种智慧化天然气加臭控制系统的控制方法，如图2所示，包括如下步骤：A control method for an intelligent natural gas odorization control system, as shown in Figure 2, includes the following steps:

S1、通过数据采集模块采集对应的数据；S1. Collect corresponding data through a data acquisition module;

S2、数据采集模块将采集的数据传递至PLC控制模块；S2. The data acquisition module transmits the collected data to the PLC control module;

S3、PLC控制模块将数据发送给上位机；S3. The PLC control module sends the data to the upper computer;

S4、在上位机界面输入当前加臭设备中的加臭剂密度、当前天然气管道管径、当前目标加臭剂浓度；S4. Input the odorant density in the current odorizing equipment, the current natural gas pipeline diameter, and the current target odorant concentration on the host computer interface;

S5、上位机上搭载的加臭剂精准投放算法模块开始计算，计算得到加注速度；S5. The odorant precise delivery algorithm module mounted on the host computer starts to calculate, and the filling speed is calculated;

S6、上位机通过PLC控制模块电气连接，将加注速度指令传输至PLC控制模块；S6. The host computer is electrically connected through the PLC control module, and transmits the filling speed command to the PLC control module;

S7、PLC控制模块将接收到的加注速度指令发送给加臭泵，加臭泵按照接收到的加注速度开始工作；S7. The PLC control module sends the received filling speed instruction to the odorizing pump, and the odorizing pump starts to work according to the received filling speed;

S8、通过加臭剂浓度检测装置获取天然气管道末端加臭剂的实际浓度；S8. Obtain the actual concentration of the odorant at the end of the natural gas pipeline through the odorant concentration detection device;

S9、若检测到的天然气管道末端加臭剂实际浓度与目标加臭剂浓度不一致，则通过比例系数调整上位机中目标加臭剂浓度数值，获得K值，通过K值修正步骤S5中的加注速度，控制系统重新按照步骤S5-S7开始工作。S9. If the detected actual concentration of the odorant at the end of the natural gas pipeline is inconsistent with the target odorant concentration, adjust the target odorant concentration value in the upper computer through the proportional coefficient to obtain the K value, and correct the addition in step S5 by the K value. Note the speed, and the control system starts to work again according to steps S5-S7.

进一步的，所述步骤S1中通过数据采集模块采集对应的数据具体是指：通过温度变送器采集天然气管道中的温度值；通过压力变送器采集天然气管道中的压力值；通过流量变送器采集天然气管道中的流量值。Further, collecting the corresponding data through the data acquisition module in the step S1 specifically refers to: collecting the temperature value in the natural gas pipeline through a temperature transmitter; collecting the pressure value in the natural gas pipeline through a pressure transmitter; The device collects the flow value in the natural gas pipeline.

进一步的，所述步骤S9中的比例系数具体是天然气管道末端加臭剂实际浓度与目标加臭剂浓度的偏差；所述的K值＝目标加臭剂浓度/天然气管道末端加臭剂实际浓度。Further, the proportional coefficient in the step S9 is specifically the deviation between the actual concentration of the odorant at the end of the natural gas pipeline and the target odorant concentration; the K value=the target odorant concentration/the actual concentration of the odorant at the end of the natural gas pipeline .

进一步的，所述步骤S9中通过K值修正步骤S5中的加注速度具体是：将步骤S5的加注速度乘以K值，得到修正后的加注速度。Further, in the step S9, correcting the filling speed in the step S5 by the K value is specifically: multiplying the filling speed in the step S5 by the K value to obtain the corrected filling speed.

本发明的天然气加臭控制系统具有温度、压力、流量数据采集装置，上位机通过搭载算法计算出加臭机加注速度传递给PLC控制模块，PLC控制模块再传递给加臭泵，从而实现天然气精准加臭系统中算法的应用，精准控制末端加臭剂浓度，从实现控制天然气管道末端加臭剂浓度达到国家标准，并保证天然气中加臭剂混合均匀。The natural gas odorizing control system of the present invention has a temperature, pressure and flow data acquisition device. The upper computer calculates the filling speed of the odorizing machine through the carrying algorithm and transmits it to the PLC control module, and the PLC control module transmits it to the odorizing pump, so as to realize the natural gas The application of the algorithm in the precise odorization system can precisely control the concentration of the odorant at the end of the natural gas pipeline, from which the concentration of the odorant at the end of the natural gas pipeline can be controlled to meet the national standard and ensure that the odorant in the natural gas is mixed evenly.

本发明可根据天然气管道末端加臭剂含量实时调整加注速度，从而保证仪器的实时性，从而从而让加臭剂浓度持续达到在国家标准之上且不浪费；本发明的控制精确度高，避免了天然气中的加臭剂过量，在不完全燃烧之后会产生一氧化碳、硫化氢、氧化硫等有害气体，保证了天然气的使用安全性。The invention can adjust the filling speed in real time according to the content of the odorant at the end of the natural gas pipeline, so as to ensure the real-time performance of the instrument, so that the concentration of the odorant can continue to reach the national standard without waste; the control accuracy of the invention is high, and the It avoids the excess of odorant in natural gas, and will produce harmful gases such as carbon monoxide, hydrogen sulfide, sulfur oxide and so on after incomplete combustion, which ensures the safety of natural gas in use.

尽管参照前述实施例对本发明进行了详细的说明，对于本领域的技术人员来说，其依然可以对前述各实施例所记载的技术方案进行修改，或者对其中部分技术特征进行等同替换,凡在本发明的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本发明的保护范围之内。Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, it is still possible to modify the technical solutions described in the foregoing embodiments, or to perform equivalent replacements for some of the technical features. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims (9)

1. An intelligent natural gas odorization control system is characterized by comprising a PLC control module (2), a data acquisition module, a calculation module and an odorization module; the odorizing module consists of an odorizing pump (3), an odorizing agent storage tank and a natural gas pipeline (5), and the calculating module comprises an upper computer (1) and an odorizing agent accurate feeding algorithm module carried on the upper computer; the system comprises a PLC control module (2), a data acquisition module, an odorizing agent accurate feeding algorithm module, a PLC control module (1), a PLC control module and a PLC control module, wherein the PLC control module is electrically connected with the upper computer (1), the PLC control module sends signal data acquired by the data acquisition module to the upper computer, the odorizing agent accurate feeding algorithm module carried on the upper computer starts to calculate, and the upper computer sends a filling speed instruction obtained after calculation to the PLC control module; and the PLC control module is electrically connected with the odorizing pump and sends the filling speed instruction to the odorizing pump.

2. The intelligent natural gas odorization control system of claim 1, wherein: the data acquisition module include temperature transmitter (4) that are used for gathering temperature signal, pressure transmitter (6) that are used for gathering pressure signal, flow transmitter (7) that are used for gathering flow signal and odorizing agent concentration detection device (8) that are used for gathering the terminal odorizing agent concentration of natural gas line.

3. The intelligent natural gas odorization control system of claim 2, wherein: and the temperature transmitter, the pressure transmitter and the flow transmitter in the data acquisition module are all arranged in the natural gas pipeline and used for acquiring corresponding data signals.

4. The intelligent natural gas odorization control system of claim 2, wherein: the odorizing agent concentration detection device is arranged at the tail end of the natural gas pipeline and used for collecting the actual concentration of the odorizing agent at the tail end of the natural gas pipeline.

5. The intelligent natural gas odorization control system of claim 1, wherein: the PLC control module comprises a temperature signal input end, a pressure signal input end, a flow signal input end and an odorizing agent concentration signal input end; the temperature signal input end of the PLC control module is connected with the temperature transmitter, the pressure signal input end is connected with the pressure transmitter, the flow signal input end is connected with the flow transmitter, and the odorizing agent concentration signal input end is connected with the odorizing agent concentration detection device.

6. A control method of the intelligent natural gas odorization control system according to any one of claims 1 to 5, characterized in that: the method comprises the following steps:

s1, acquiring corresponding data through a data acquisition module;

s2, the data acquisition module transmits the acquired data to the PLC control module;

s3, the PLC control module sends the data to an upper computer;

s4, inputting the density of the odorizing agent in the current odorizing equipment, the current pipe diameter of the natural gas pipeline and the current target odorizing agent concentration on the upper computer interface;

s5, starting calculation by an odorizing agent accurate feeding algorithm module carried on the upper computer, and calculating to obtain a feeding speed;

s6, electrically connecting the upper computer through the PLC control module, and transmitting the filling speed instruction to the PLC control module;

s7, the PLC control module sends the received filling speed instruction to the odorizing pump, and the odorizing pump starts to work according to the received filling speed;

s8, acquiring the actual concentration of the odorizing agent at the tail end of the natural gas pipeline through an odorizing agent concentration detection device;

s9, if the detected actual concentration of the odorizing agent at the tail end of the natural gas pipeline is inconsistent with the target odorizing agent concentration, adjusting the target odorizing agent concentration value in the upper computer through the proportionality coefficient to obtain a K value, correcting the filling speed in the step S5 through the K value, and enabling the control system to start working again according to the steps S5-S7.

7. The control method of the intelligent natural gas odorization control system according to claim 6, wherein: the step S1 of acquiring the corresponding data through the data acquisition module specifically includes: collecting a temperature value in a natural gas pipeline through a temperature transmitter; collecting a pressure value in the natural gas pipeline through a pressure transmitter; and collecting the flow value in the natural gas pipeline through a flow transmitter.

8. The control method of the intelligent natural gas odorization control system according to claim 6, wherein: the proportionality coefficient in step S9 is specifically a deviation of the actual odorizing agent concentration at the end of the natural gas pipe from the target odorizing agent concentration; and K is equal to the target odorizing agent concentration/the actual odorizing agent concentration at the tail end of the natural gas pipeline.

9. The control method of the intelligent natural gas odorization control system according to claim 6, wherein: the step S9 of correcting the filling speed in the step S5 by the K value is specifically: multiplying the filling speed of the step S5 by the K value to obtain the corrected filling speed.

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