CN-121977244-A - Centralized energy supply optimizing system and method for chemical industry park production

CN121977244ACN 121977244 ACN121977244 ACN 121977244ACN-121977244-A

Abstract

The invention relates to the technical field of energy supply of chemical industry parks, and discloses a centralized energy supply optimizing system for chemical industry parks. The system comprises an energy conversion station, an energy supply pipeline, an intelligent energy management station, a central control room and a signal instruction transmission line. The energy conversion station is internally provided with a cogeneration device and a waste heat recovery device, an energy supply pipeline adopts a double-layer structure, the inner layer is made of corrosion-resistant alloy, the outer layer is made of high-strength alloy steel, a buffer heat insulation layer is arranged in the middle, a pressure transmitter, a shut-off valve and an emergency emptying valve are arranged on the pipeline and are connected with a central control room through signal lines, an energy sensor is arranged on the production device and is connected with an intelligent energy management station, and a regulating valve and a flowmeter are also arranged on the pipeline. The invention obviously improves the energy supply safety by combining a double-layer pipeline structure with a real-time pressure monitoring and emergency treatment mechanism, improves the comprehensive utilization rate of energy to 78-82% by cogeneration, waste heat recovery and intelligent energy distribution, ensures the production stability by accurate regulation and control, and effectively reduces the defective rate of products.

Inventors

LI YAWEN
ZHANG HONGCHANG
ZHOU JIANHUA
ZHU RUIJIE
LI TIANQI
LIU YING

Assignees

金川集团股份有限公司
金川集团化工新材料有限责任公司

Dates

Publication Date: 20260505
Application Date: 20251222

Claims (10)

1. Energy optimizing system is concentrated in chemical industry garden production, characterized in that includes: the energy conversion station is internally provided with a cogeneration device and a waste heat recovery device connected with the cogeneration device; The energy supply pipeline is led out from the energy conversion station and connected to at least one production device in the park, adopts a double-layer structure, the inner layer of the energy supply pipeline is made of corrosion-resistant alloy materials, the outer layer of the energy supply pipeline is made of high-strength alloy steel, and a buffer heat insulation layer is arranged between the inner layer and the outer layer; A plurality of pressure transmitters, shut-off valves and emergency vent valves disposed along the energy supply conduit; The intelligent energy management station is connected with an energy sensor arranged on the production device through a signal instruction transmission route; The central control chamber is connected with the pressure transmitter, the cut-off valve and the emergency emptying valve through the signal instruction transmission route; the energy supply pipeline is further provided with a regulating valve and a flowmeter, the regulating valve is connected with the intelligent energy management station, and the flowmeter is connected with the intelligent energy management station.
2. The centralized energy optimization system for chemical industrial park production of claim 1, wherein the number of pressure transmitters is 2-10 and is evenly distributed along the length of the energy supply pipeline.
3. The centralized energy supply optimization system for chemical industrial park production according to claim 1, wherein an intelligent analysis system is arranged in the central control room and is configured to receive pressure data of the pressure transmitter, determine whether a leakage or overpressure condition occurs based on a preset pressure threshold value, and send control instructions to the shut-off valve and the emergency vent valve when an abnormality is determined to occur.
4. The concentrated energy optimization system for chemical industrial park production of claim 1, wherein the cogeneration unit adopts a low nitrogen oxide burner, and the waste heat recovery unit comprises a flue gas heat exchanger and a device heat dissipation recoverer.
5. The centralized energy supply optimization system for chemical industrial park production of claim 1, wherein the intelligent energy management station comprises a data processing unit and an algorithm module, wherein the algorithm module outputs a command signal for controlling the regulating valve based on the demand data and the historical operation data collected by the energy sensor.
6. The centralized energy supply optimizing system for chemical industrial park production according to claim 1, wherein the production device is a PVC production device, and the energy sensor comprises a temperature sensor and an electric load sensor and is respectively arranged on the PVC polymerization reactor and the post-treatment equipment.
7. The centralized energy supply optimization system for chemical industrial park production of claim 1, wherein the flowmeter is an electromagnetic flowmeter or a vortex shedding flowmeter, and is installed at a position downstream of the regulating valve.
8. A method of using the chemical industry park production centralized energy supply optimizing system of any one of claims 1 to 7, comprising the steps of: s1, generating steam and electric power through the cogeneration device, and recovering flue gas and equipment heat dissipation waste heat through the waste heat recovery device; S2, conveying the generated energy to the production device through the energy supply pipeline with the double-layer structure; s3, acquiring pressure data of the energy supply pipeline in real time through the pressure transmitter, and transmitting the pressure data to the central control room through the signal instruction transmission route; s4, when the central control room judges that the pressure data exceeds a preset threshold value, controlling the cut-off valve to cut off medium flow, and simultaneously controlling the emergency vent valve to release pressure; S5, acquiring energy demand data of the production device in real time through the energy sensor, and transmitting the energy demand data to the intelligent energy management station through the signal instruction transmission route; S6, the intelligent energy management station generates a regulating instruction according to the received energy demand data and a preset algorithm, and sends the regulating instruction to the regulating valve so as to regulate the energy flow, and meanwhile, the flowmeter monitors the actual flow and performs feedback correction.
9. The method of optimizing energy supply in a chemical industrial park according to claim 8, wherein in step S1, the waste heat recovered by the waste heat recovery device is used for preheating feed water to the cogeneration device or for park hot water supply.
10. The method for optimizing energy supply in a chemical industrial park according to claim 8, wherein in step S6, the preset algorithm performs step distribution and dynamic scheduling of steam and power based on the temperature control requirement of the polymerization reaction stage and the power load characteristics of the post-treatment process in the PVC production process.

Description

Centralized energy supply optimizing system and method for chemical industry park production Technical Field The invention belongs to the technical field of energy supply of chemical industry parks, and particularly relates to a centralized energy supply optimizing system for production of a chemical industry park. Background The safety, the high efficiency and the stability of the energy supply system of the chemical industry park serving as an important carrier for the gathering and the development of the chemical industry are directly related to the continuity and the economy of the production process. Especially in the high energy consumption chemical industry garden that represents with PVC production, traditional dispersed energy supply mode leads to that the energy utilization is low, pipe network potential safety hazard is outstanding, and is difficult to satisfy the accurate requirement of complicated technology to energy parameter, and what need is urgent promotes whole efficiency and operational reliability through concentrated energy supply optimizing system. In the prior art, some improvements aiming at energy systems of chemical industry parks exist. For example, part of the schemes adopt supercritical back pressure generator sets and air separation devices for coupling, so that cascade utilization and waste heat recovery of steam are realized, but the safety design of an energy supply pipe network is weak, the pipelines are made of conventional materials, corrosion resistance and pressure resistance are poor, an effective pressure monitoring and emergency treatment mechanism is not integrated, and abnormal working conditions such as leakage or overpressure are difficult to respond quickly. In addition, a heat supply coordination control method based on an energy management system is provided, and load balance between a thermal power plant and a user is realized through data acquisition and algorithm optimization, however, the method focuses on scheduling on a software level, physical integration and hardware configuration for various energy forms (such as steam, hot water and electric power) are lacked, and particularly, the accurate adaptation capability for differentiated energy requirements of each link in PVC production is insufficient, so that energy distribution is not flexible enough, and comprehensive energy efficiency still has a room for improvement. Therefore, there is a need for an optimization system that can achieve energy safety, energy integration and accurate distribution to cope with the energy supply challenges in the complex production environment of the chemical industry park. Disclosure of Invention Aiming at the problems of serious energy waste, low comprehensive utilization rate, messy pipe network layout, high maintenance cost, high potential safety hazard caused by scattered energy supply, corrosion resistance, poor pressure resistance, easy leakage, lack of an efficient pressure monitoring and emergency treatment mechanism, unstable energy supply, influence on production quality and defective rate and the like of the traditional energy supply mode in the prior art, the invention provides a safe, efficient and stable centralized energy supply optimizing system and method for production of a chemical industrial park. Aiming at the problems, the technical scheme provided by the invention is as follows: The centralized energy supply optimizing system for the production of the chemical industry park comprises an energy conversion station, an energy supply pipeline, an intelligent energy management station, a central control room and an adjusting valve and a flowmeter, wherein the energy conversion station is internally provided with a cogeneration device and a waste heat recovery device connected with the cogeneration device, the energy supply pipeline is led out from the energy conversion station and is connected to at least one production device in the park, the energy supply pipeline adopts a double-layer structure, the inner layer is made of corrosion-resistant alloy materials, the outer layer is made of high-strength alloy steel, a buffer heat insulation layer is arranged between the inner layer and the outer layer, the pressure transmitters, the cut-off valves and the emergency emptying valves are arranged along the energy supply pipeline, the intelligent energy management station is connected with an energy sensor arranged on the production device through a signal instruction transmission route, the central control room is connected with the pressure transmitters, the cut-off valves and the emergency emptying valves through the signal instruction transmission route, the adjusting valve is further arranged on the energy supply pipeline and is connected with the intelligent energy management station, and the flowmeter is connected with the intelligent energy management station. Further, the number of the pressure transmitters is 2 to 10, and the pressure transmitter