Distributed Control System for Waste Incineration Plant

Abstract

The present application provides a decentralized control system for a waste incineration plant, which is provided with a main DCS controller and a backup DCS controller, and is provided with a main power supply device and a backup power supply device. When the main DCS controller fails, the backup DCS controller can be automatically put into use and continue to perform signal acquisition and collaborative control to achieve control function redundancy. At the same time, both the main power supply device and the backup power supply device can supply power to each component in the decentralized control system, thereby achieving dual power supply. When the main power supply device fails, the backup power supply device can be automatically put into use and continue to supply power to the decentralized control system of the waste incineration plant to achieve power supply function redundancy. In this way, the impact of the failure of the DCS controller and the power supply device on the operation of each system / unit can be reduced, so that each system / unit can operate more safely and stably.

Description

Technical Field

[0001] The present application relates to the field of electronic circuit technology, and in particular to a distributed control system for a waste incineration plant. Background Art

[0002] A DCS (Distributed Control System) is installed inside the waste incineration plant to coordinate and uniformly control the various systems / units in the waste incineration plant, including the incineration boiler, steam turbine, flue gas purification, small dry deacidification, large dry deacidification, ammonia area, pulse soot blowing, steam soot blowing, bag dust removal, etc., so as to reduce the pollution of waste incineration to the environment and generate electricity efficiently based on the resources and energy obtained from burning waste.

[0003] However, the current decentralized control systems of waste incineration plants have the defect of poor functional redundancy, which easily affects the safe and stable operation of various systems / units in the waste incineration plants. Utility Model Content

[0004] The purpose of this application is to solve at least one of the above-mentioned technical defects, especially the technical defect of poor functional redundancy in the prior art.

[0005] In one embodiment, the present application provides a distributed control system for a waste incineration plant, including:

[0006] Host computer;

[0007] A main DCS controller, connected to the host computer;

[0008] A standby DCS controller, connected to the host computer and the main DCS controller respectively;

[0009] A main power supply device, connected to the host computer, the main DCS controller and the standby DCS controller respectively;

[0010] A backup power supply device, connected to the host computer, the main DCS controller, the backup DCS controller and the main power supply device respectively;

[0011] The incineration boiler local control system is respectively connected to the main DCS controller, the backup DCS controller, the main power supply device and the backup power supply device;

[0012] A boiler automatic combustion control system, connected to the main DCS controller, the backup DCS controller, the main power supply device and the backup power supply device respectively;

[0013] A steam turbine control system, connected to the main DCS controller, the backup DCS controller, the main power supply device and the backup power supply device respectively;

[0014] The public control system is respectively connected to the main DCS controller, the backup DCS controller, the main power supply device and the backup power supply device.

[0015] In one embodiment, the incineration boiler local control system includes an incineration boiler local controller, the boiler automatic combustion control system includes an automatic combustion controller, the steam turbine control system includes a steam turbine controller, and the public control system includes a public controller;

[0016] The incineration boiler local controller, the automatic combustion controller, the steam turbine controller, the common controller, the main DCS controller and the standby DCS controller are all controllers of the same model.

[0017] In one embodiment, the main DCS controller and the backup DCS controller are both ECS-700 model controllers.

[0018] In one embodiment, the incineration boiler local control system is connected to the main DCS controller and the backup DCS controller respectively through a 6-core multi-single-mode optical fiber;

[0019] The boiler automatic combustion control system is connected to the main DCS controller and the standby DCS controller respectively through a 6-core multi-single-mode optical fiber;

[0020] The turbine control system is connected to the main DCS controller and the standby DCS controller respectively through a 6-core multi-single-mode optical fiber;

[0021] The public control system is connected to the main DCS controller and the standby DCS controller respectively through a 6-core multi-single-mode optical fiber.

[0022] In one of the embodiments, the distributed control system further comprises an IO module base, an IO module and a host cabinet;

[0023] The main cabinet has a first accommodating cavity and a second accommodating cavity, the first accommodating cavity is located above the second accommodating cavity, and the main DCS controller and the standby DCS controller are arranged in the first accommodating cavity;

[0024] The main DCS controller is connected to the incineration boiler local control system, the boiler automatic combustion control system, the steam turbine control system and the public control system through the IO module, and the standby DCS controller is connected to the incineration boiler local control system, the boiler automatic combustion control system, the steam turbine control system and the public control system through the IO module;

[0025] The IO module is inserted into the IO module base; at least a portion of the IO module base is disposed in the second accommodating cavity and is fixed by a snap-fit ​​structure.

[0026] In one embodiment, a plurality of the IO module bases are arranged in rows and columns in the second accommodating cavity.

[0027] In one of the embodiments, the main cabinet further includes a third accommodating cavity, and the main power supply device and the backup power supply device are arranged in the third accommodating cavity.

[0028] In one of the embodiments, the distributed control system further includes an expansion cabinet, and the expansion cabinet is formed with a fourth accommodating cavity; part of the IO module base is disposed in the fourth accommodating cavity and fixed by a snap-fit ​​structure.

[0029] In one embodiment, a plurality of the IO module bases are arranged in rows and columns in the fourth accommodation cavity.

[0030] In one embodiment, the host computer includes an operator station, an engineer station and a history station.

[0031] In the distributed control system of the waste incineration plant provided in some embodiments of the present application, a main DCS controller and a backup DCS controller are provided at the same time, and a main power supply device and a backup power supply device are provided at the same time. The main DCS controller and the backup DCS controller are respectively connected to the host computer, the incineration boiler local control system, the boiler automatic combustion control system, the steam turbine control system and the public control system. When the main DCS controller fails, the backup DCS controller can be automatically put into use and continue to perform signal acquisition and collaborative control to achieve control function redundancy. At the same time, both the main power supply device and the backup power supply device can supply power to each component in the distributed control system, thereby realizing dual power supply. When the main power supply device fails, the backup power supply device can be automatically put into use and continue to supply power to the distributed control system of the waste incineration plant to achieve power supply function redundancy. In this way, the impact of the failure of the DCS controller and the power supply device on the operation of each system / unit can be reduced, so that each system / unit can operate more safely and stably. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0033] Figure 1A schematic diagram of the system structure of a distributed control system of a waste incineration plant in one embodiment;

[0034] Figure 2 A main view of a main cabinet in one embodiment;

[0035] Figure 3 A rear view of a main cabinet in one embodiment. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0037] In one embodiment, the present application provides a distributed control system for a waste incineration plant. Figure 1 As shown, the distributed control system of the waste incineration plant includes: a host computer, a main DCS controller, a backup DCS controller, a main power supply device, a backup power supply device, an incineration boiler local control system, a boiler automatic combustion control (Automatic Combustion Control, referred to as ACC) system, a steam turbine control system and a common control system. In one example, the host computer may include an operator station, an engineer station and a history station, wherein the operator station refers to a device for interacting with an operator, the engineer station refers to a device for interacting with an engineer, and the history station may be a device for storing historical data of the waste incineration plant. For example, the operator station, the engineer station and the history station may all be implemented using computer equipment.

[0038] The specific number of incineration boiler local control systems can be determined according to the number of incineration boilers in the waste incineration plant. In one example, if the waste incineration plant includes three groups of incineration boilers, the decentralized control system of the waste incineration plant may include three incineration boiler local control systems, namely the first incineration boiler local control system, the second incineration boiler local control system and the third incineration boiler local control system. The first incineration boiler local control system is the local control system of the first waste incineration boiler, the second incineration boiler local control system is the local control system of the second waste incineration boiler, and the third incineration boiler local control system is the local control system of the third waste incineration boiler.

[0039] The boiler automatic combustion control system refers to a system that automatically and accurately controls the combustion process of garbage incineration based on the combustion parameters such as temperature, pressure, and oxygen content in the garbage incinerator. It can be understood that the specific number can be determined based on the number of incineration boilers in the garbage incineration plant. In an example, if the garbage incineration plant includes 3 groups of incineration boilers, the decentralized control system of the garbage incineration plant may include 3 boiler automatic combustion control systems, namely the first boiler automatic combustion control system, the second boiler automatic combustion control system, and the third boiler automatic combustion control system, and the 3 boiler automatic combustion control systems correspond to the 3 incineration boilers one by one.

[0040] The steam turbine control system may be a control system for a power generation steam turbine, and the specific number of the steam turbine control systems may be determined according to the number of power generation steam turbines in the waste incineration plant. In one example, when the waste incineration plant includes two groups of power generation steam turbines, the distributed control system of the present application may include two steam turbine control systems, namely a first steam turbine control system and a second steam turbine control system.

[0041] The common control system may include a SNCR (Selective Non-catalytic Reduction) system, a deacidification system and / or a large dry process system, etc.

[0042] In this application, the main DCS controller is respectively connected to the host computer, the main power supply equipment, the backup power supply equipment, the incineration boiler local control system, the boiler automatic combustion control system, the steam turbine control system and the public control system. The backup DCS controller is respectively connected to the host computer, the main DCS controller, the main power supply equipment, the backup power supply equipment, the incineration boiler local control system, the boiler automatic combustion control system, the steam turbine control system and the public control system. Both the main DCS controller and the backup DCS controller can receive information reported by each auxiliary system and perform collaborative control. Both the main DCS controller and the backup DCS controller can exchange data with the host computer. When the main DCS controller fails, the backup DCS controller can be automatically put into use, thereby achieving control function redundancy.

[0043] It can be understood that the DCS controller can be connected to the incineration boiler local control system, boiler automatic combustion control system, steam turbine control system and public control system in any way. In one example, the main DCS controller can be connected to the incineration boiler local control system, boiler automatic combustion control system, steam turbine control system and public control system through 6-core multi-single-mode optical fiber. The standby DCS controller can be connected to the incineration boiler local control system, boiler automatic combustion control system, steam turbine control system and public control system through 6-core multi-single-mode optical fiber. In this way, the communication performance can be improved.

[0044] Both the main power supply equipment and the backup power supply equipment can supply power to the distributed control system. Specifically, the main power supply equipment can be connected to the host computer, the main DCS controller, the backup DCS controller, the local control system of the incineration boiler, the boiler automatic combustion control system, the steam turbine control system and the public control system. The backup power supply equipment can be connected to the host computer, the main power supply equipment, the main DCS controller, the backup DCS controller, the local control system of the incineration boiler, the boiler automatic combustion control system, the steam turbine control system and the public control system. In this way, when the main power supply equipment fails, the backup power supply equipment can be put into use immediately to supply power to the distributed control system of the waste incineration plant, realize power supply function redundancy, and thus avoid the distributed control system from stopping operation due to power failure. In this way, the impact of the failure of the DCS controller and the power supply equipment on the operation of each system / unit can be reduced, so that each system / unit can operate more safely and stably.

[0045] In one embodiment, the incineration boiler local control system, boiler automatic combustion control system, steam turbine control system and public control system can be regarded as auxiliary control systems of the distributed control system. Since the waste incineration plant occupies a large area and has many components, an auxiliary control system can be set between the DCS controller and the operating equipment to collect, summarize and report operating parameters through the auxiliary control system and control the operating status of the operating equipment according to the instructions issued by the DCS controller.

[0046] Among them, the incineration boiler local control system may include an incineration boiler local controller, the boiler automatic combustion control system may include an automatic combustion controller, the steam turbine control system may include a steam turbine controller, and the public control system includes a public controller. The main DCS controller may be connected to the incineration boiler local controller, the automatic combustion controller, the steam turbine controller and the public controller respectively to achieve information interaction with the incineration boiler local control system, the boiler automatic combustion control system, the steam turbine control system and the public control system. Similarly, the standby DCS controller may be connected to the incineration boiler local controller, the automatic combustion controller, the steam turbine controller and the public controller respectively to achieve information interaction with the incineration boiler local control system, the boiler automatic combustion control system, the steam turbine control system and the public control system.

[0047] The incineration boiler local controller, automatic combustion controller, turbine controller, common controller, main DCS controller and standby DCS controller can all be the same model of controller. In this way, the DCS controller does not need to communicate frequently with the third-party PLC (Programmable Logic Controller), thereby improving the communication rate and data response efficiency.

[0048] It can be understood that the specific device models selected for the incineration boiler local controller, automatic combustion controller, steam turbine controller, common controller, main DCS controller and standby DCS controller can be determined according to actual conditions. In one example, each controller can be an ECS-700 model controller to increase the control point capacity, realize the modern unit operation big data management function and application adaptability, avoid being restricted by parameter bottlenecks such as DCS load, network load, and controller load, so as to further improve the operation safety and stability of each system / unit in the distributed control system.

[0049] In one embodiment, the distributed control system may further include an IO (Input / Output) base, an IO module 30 and a host cabinet 10. Figure 2 As shown, the main cabinet 10 has a first accommodating cavity 101 and a second accommodating cavity 102 . The first accommodating cavity 101 is located above the second accommodating cavity 102 . The main DCS controller and the standby DCS controller are both arranged in the first accommodating cavity 101 .

[0050] The IO module 30 may be an input / output module, and may be connected between the DCS controller and various auxiliary systems. In other words, the DCS controller (including the main DCS controller and the standby DCS controller) may be connected to the incineration boiler local control system, the boiler automatic combustion control system, the steam turbine control system, and the public control system through the IO module 30.

[0051] It can be understood that the IO module 30 can be selected according to the actual situation. In one example, the present application can use the IO module 30 of the AI713-S11, AI731-S11, AO713-S11, DI716-S11 and / or DO711-S11 model. Considering that the waste incineration plant involves both the input and output of digital signals and the input and output of analog signals, the present application can use the IO modules 30 of the aforementioned models at the same time.

[0052] The IO module 30 is inserted into the IO module base 20, at least part of the IO module base 20 is disposed in the second accommodation cavity 102, and is fixed in the main cabinet 10 by a buckle structure. Compared with the traditional screw fixing method, the buckle structure used in this solution to fix the card can facilitate subsequent disassembly, replacement and maintenance, thereby improving convenience.

[0053] In one embodiment, the IO module bases 20 may be arranged in rows and columns in the second accommodating cavity 102, so as to achieve compact distribution and save space. Figure 2 As shown, the IO module bases 20 may be arranged in one row and two columns in the second accommodation cavity 102 .

[0054] In one embodiment, the main cabinet 10 may further include a third accommodating chamber 103. It is understood that the specific location of the third accommodating chamber 103 may be determined according to actual conditions, and this document does not specifically limit this. Figure 3 As shown, the first accommodating cavity 101 and the second accommodating cavity 102 may be located in front of the main cabinet 10, and the third accommodating cavity 103 may be located at the back of the main cabinet 10. The main power supply device and the backup power supply device may be arranged in the third accommodating cavity 103. In one example, the main cabinet 10 may further include a fifth accommodating cavity 105, which is located below the third accommodating cavity 103, and the central control relay input terminal board 40 of the distributed control system may also be arranged in rows and columns in the fifth accommodating cavity 105.

[0055] In one embodiment, the distributed control system may further include an expansion cabinet to place the IO modules 30 of the distributed control system through the expansion cabinet. The expansion cabinet may be formed with a fourth accommodating cavity, and part of the IO module base 20 is arranged in the fourth accommodating cavity and fixed by a snap-fit ​​structure, thereby improving convenience. Further, in one example, multiple IO module bases 20 may be arranged in rows and columns in the fourth accommodating cavity, thereby achieving compact distribution and saving space.

[0056] Finally, it should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that there is any such actual relationship or order between these entities or operations. Moreover, the term "include", "comprise" or any other variant thereof is intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements not only includes those elements, but also includes other elements not clearly listed, or also includes elements inherent to such process, method, article or equipment. In the absence of more restrictions, the elements defined by the sentence "including one..." do not exclude the existence of other identical elements in the process, method, article or equipment including the elements. Herein, "one", "one", "said", "the" and "it" may also include plural forms, unless the context clearly indicates another way. A plurality refers to at least two cases, such as 2, 3, 5 or 8, etc. "And / or" includes any and all combinations of the relevant listed items.

[0057] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The various embodiments can be combined as needed, and the same or similar parts can refer to each other.

[0058] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A distributed control system for a waste incineration plant, characterized in that: include: Host computer; A main DCS controller, connected to the host computer; A standby DCS controller, connected to the host computer and the main DCS controller respectively; A main power supply device, connected to the host computer, the main DCS controller and the standby DCS controller respectively; A backup power supply device, connected to the host computer, the main DCS controller, the backup DCS controller and the main power supply device respectively; The incineration boiler local control system is respectively connected to the main DCS controller, the backup DCS controller, the main power supply device and the backup power supply device; A boiler automatic combustion control system, connected to the main DCS controller, the backup DCS controller, the main power supply device and the backup power supply device respectively; A steam turbine control system, connected to the main DCS controller, the backup DCS controller, the main power supply device and the backup power supply device respectively; The public control system is respectively connected to the main DCS controller, the backup DCS controller, the main power supply device and the backup power supply device.

2. The distributed control system of a waste incineration plant according to claim 1, characterized in that: The incineration boiler local control system includes an incineration boiler local controller, the boiler automatic combustion control system includes an automatic combustion controller, the steam turbine control system includes a steam turbine controller, and the public control system includes a public controller; The incineration boiler local controller, the automatic combustion controller, the steam turbine controller, the common controller, the main DCS controller and the standby DCS controller are all controllers of the same model.

3. The distributed control system of a waste incineration plant according to claim 2, characterized in that: The main DCS controller and the standby DCS controller are both ECS-700 model controllers.

4. The distributed control system of a waste incineration plant according to any one of claims 1 to 3, characterized in that: The incineration boiler local control system is connected to the main DCS controller and the standby DCS controller respectively through a 6-core multi-single-mode optical fiber; The boiler automatic combustion control system is connected to the main DCS controller and the standby DCS controller respectively through a 6-core multi-single-mode optical fiber; The turbine control system is connected to the main DCS controller and the standby DCS controller respectively through a 6-core multi-single-mode optical fiber; The public control system is connected to the main DCS controller and the standby DCS controller respectively through a 6-core multi-single-mode optical fiber.

5. The distributed control system of a waste incineration plant according to claim 1, characterized in that: The distributed control system also includes an IO module base, an IO module and a host cabinet; The main cabinet has a first accommodating cavity and a second accommodating cavity, the first accommodating cavity is located above the second accommodating cavity, and the main DCS controller and the standby DCS controller are arranged in the first accommodating cavity; The main DCS controller is connected to the incineration boiler local control system, the boiler automatic combustion control system, the steam turbine control system and the public control system through the IO module, and the standby DCS controller is connected to the incineration boiler local control system, the boiler automatic combustion control system, the steam turbine control system and the public control system through the IO module; The IO module is inserted into the IO module base; at least a portion of the IO module base is disposed in the second accommodating cavity and is fixed by a snap-fit ​​structure.

6. The distributed control system of a waste incineration plant according to claim 5, characterized in that: A plurality of the IO module bases are arranged in rows and columns in the second accommodating cavity.

7. The distributed control system of a waste incineration plant according to claim 5, characterized in that: The main cabinet also includes a third accommodating cavity, and the main power supply device and the backup power supply device are arranged in the third accommodating cavity.

8. The distributed control system of a waste incineration plant according to claim 5, characterized in that: The distributed control system further includes an expansion cabinet, which is formed with a fourth accommodating cavity; part of the IO module base is disposed in the fourth accommodating cavity and is fixed by a snap-fit ​​structure.

9. The distributed control system of a waste incineration plant according to claim 8, characterized in that: The plurality of IO module bases are arranged in rows and columns in the fourth accommodation cavity.

10. The distributed control system of a waste incineration plant according to any one of claims 1 to 3 and 5 to 9, characterized in that: The host computer includes an operator station, an engineer station and a history station.

Images