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**Bid Announcement for PID Optimization and Tuning of the Methanol Branch of Ningxia Coal Industry Co., Ltd., part of Energy Group Author/Source: Date: 2022-10-27 Clicks: 10 1. Bidding Conditions The name of this bidding project is: Public Bid for PID Optimization and Tuning of the Methanol Branch of Ningxia Coal Industry. The project’s bidding number is CEZB220409191. The bidder is **Energy Group Ningxia Coal Industry Co., Ltd., while the project owner is the Methanol Branch of Guoneng Ningxia Coal Industry. The funding for this project comes from internal sources. *The project has met the conditions for bidding; therefore, a public tender with post-qualification review within China is being conducted for this project. 2. Project Overview and Scope of Bidding 2.1 Project overview, scope of bidding, and division into bid sections (packages): 2.1.1 Project overview: The plant control systems for the PID optimization and tuning projects carried out by the Methanol Branch are the Honeywell PKS C200 control system, version R301.2, the Foxboro I/A SERIES control system, version 8.7, and the Zhejiang Zhongkong ECS700 system, version V4.5. A total of 784 PID loops need to be optimized this time; among them, there are 441 loops in the methanol plant and 343 loops in the polyoxymethylene plant. The current control method used is the PID control algorithm based on error control ； The main processes in the methanol plant include the four-nozzle gasification technology developed by East China University of Science and Technology, the Lurgi process for methanol synthesis and distillation, and the sulfur recovery unit based on the Shell process ； The polyoxymethylene plant adopts a rich-technology process, mainly including formaldehyde production, trioxymethylene, dioxolane, polymerization and utility systems, as well as exhaust gas incineration sections. To further enhance the overall level of automation in the production units, improve their operational stability, a PID optimization system is implemented to boost the automation across the entire process of these units, enable precise control over them, and increase their stability and safety. This also reduces the workload associated with production operations, while laying a solid foundation for future project developments. 2.1.2 Scope of the tender and division of bid sections (packages): Only 1 bid section is designated for this project. The scope of the tender involves the PID optimization and tuning for Ningxia Coal Industry’s methanol production facility. The scope includes: (1) Establishing two dedicated PID control systems that are independent of the DCS system, to collect in real time data related to the PID control loops of the devices; the hardware configuration is detailed in the attachment. (2) The PID self-tuning algorithm is used to adjust the parameters of the 784 PID loops across the entire company in real time, while monitoring the operating status of these loops, thereby enabling real-time online monitoring of the stability level of the automatic control systems throughout the company. (3) Responsible for equipment supply, installation, system commissioning, and evaluation after operation; the security level meets the requirements of Level 2 for industrial control network security. (4) Complete system operation training, project assessment and acceptance, as well as the delivery of relevant documents. (5) Technical requirements: ① Achieve a real-time automatic control rate of ≥95% ； ②Real-time control stability rate ≥ 96% ； ③The average daily number of operations for the device control circuits is reduced to 30% of the level before implementation, or ≤100 operations per 100 control circuits ； ④The performance of 784 control loops is monitored, and relevant indicators such as the automatic control rate, stability rate, performance score, and performance level of these loops are generated automatically. This enables the assessment of factors that affect the performance of control loops and provides guidance on measures to improve their performance ； ⑤Perform batch monitoring and evaluation of the PID control loop performance in production units to quickly and accurately identify faults within the control loops ； ⑥PID tuning features intelligent automatic tuning, providing reasonable parameter suggestions ； ⑦For real-time optimization of PID parameters, the system must provide both manual and automatic methods for entering these parameters; the switch between the two methods should be done manually without any interference, and automatic switching by the system is not allowed ； ⑧Diagnose the health status of the control loop by taking into account factors such as its stability, speed, accuracy, as well as various performance indicators; determine whether the loop is stable and whether its control performance meets the required standards. Based on the operating condition of the control loop, different colors are used to indicate excellent, good, medium, poor performance ； ⑨PID maintenance features functions such as diagnosis of changes in the characteristics of the controlled objects in the loop, intelligent evaluation of controller performance, and assistance in making maintenance decisions ； ⑩Other technical requirements are listed in the attachment. 2.1.3 Project location: Ningxia Coal Industry Methanol Branch. 2.1.4 Service period: 5 months from the date of contract signing; planned start date: November 30, 2022. 2.2 Others: / 3. Bidder Qualification Requirements 3.1 Qualification and Experience Requirements: [1] Qualification Requirement: The bidder must be an independently registered legal entity or other organization, and must provide valid proof documents. 【2】Financial requirements: / 【3】Performance requirements: From October 2017 to the deadline for bid submission (subject to the contract signing date), the bidder must have at least two completed individual contracts, each involving PID tuning services for chemical plants with a contract value of no less than 1.5 million yuan. Bidders must provide scanned copies of contracts that demonstrate compliance with the performance requirements for this tender, along with corresponding customer verification documents. The scanned contract copies must include at least the pages bearing the signatures of both parties to the contract, the date the contract was signed, and the key information specified in the performance requirements ； The user certification must be stamped by the end-user; it can be an acceptance certificate, a usage certificate, follow-up records, or other documents that can prove the completion of the subject matter of the contract. 【4】Credit requirements: / 【5】Qualification requirements for the project leader: / 【6】Requirements for other key personnel: / 【7】Equipment requirements: / 【8】Other requirements: / Note: Qualifications and performance records of parent and subsidiary companies cannot be used interchangeably. 3.2 Joint bids are not accepted for this project. 4. Obtaining of tender documents 4.1* The sale of tender documents commences at 09:00:00 on October 27, 2022, and the deadline for purchasing them is 16:30:00 on November 1, 2022. *The price per set of the bidding documents is 500.0 RMB per bid section (package); this amount is non-refundable after purchase. * *The deadline for submitting bid documents (the bid closing time, hereinafter the same) and the time for opening bids is 2022-11-16 09:00:00 (Beijing Time)*.