RTO oxidation furnace based on FF bus protocol

Abstract

The utility model discloses an RTO oxidation furnace based on an FF bus protocol, and particularly relates to the technical field of RTO furnaces, the RTO oxidation furnace comprises a furnace body system and a monitoring system, and the monitoring system transmits and receives signals between instruments and meters through the FF bus protocol; the furnace body system sequentially comprises a furnace body, a combustor, a combustion fan, an air mixing box, a flame arrester, a main fan, a buffer tank, a waste gas cyclone mixer, a demister, a reverse blowing fan, an activated carbon adsorption box and a plurality of filters. According to the utility model, an FF field bus type instrument is adopted, which is different from the conventional 4-20mA one-way transmission, the field bus can realize direct mutual access and control between instrument valves, noise interference in the transmission process can be reduced, the precision of the instrument can be improved, and field control can be really realized; an FF bus is selected through sensors such as an instrument, and the instrument can output multiple paths of signals.

Description

Technical Field

[0001] The utility model relates to the technical field of RTO furnaces, and more specifically, to an RTO oxidation furnace based on FF bus protocol. Background Art

[0002] The regenerative thermal waste gas incinerator is also called: regenerative thermal oxidizer, the English name is "Regenerative Thermal Oxidizer", abbreviated as "RTO".

[0003] The working principle of the thermal storage high temperature incineration equipment - RTO: heat the organic waste gas to above 760℃ with a residence time of >0.5sec, so that the VOC in the waste gas is oxidized and decomposed into harmless CO2 and H2O; the heat of the high temperature gas during oxidation is "stored" by the thermal storage body and used to preheat the newly entering organic waste gas, thereby saving the fuel consumption required for heating and reducing operating costs.

[0004] In traditional RTO projects, all instrument or valve signals are measured and controlled using 4-20mA or 0-10V analog input and output. During the signal transmission process, there is a certain amount of noise interference, which affects the accuracy of the instrument. Utility Model Content

[0005] In order to solve the above technical problems, the utility model provides an RTO oxidation furnace based on the FF bus protocol, including a furnace system and a monitoring system, wherein the monitoring system transmits and receives signals between instruments and meters through the FF bus protocol;

[0006] The furnace system comprises a furnace body, a burner, a combustion-supporting fan, an air mixing box, a flame arrester, a main fan, a buffer tank, an exhaust gas cyclone mixer, a demister, a back-purge fan, an activated carbon adsorption box and a plurality of filters in sequence.

[0007] In a preferred embodiment, the burner is installed on the top of the furnace body, the combustion-supporting fan is connected to the burner, the bottom of the furnace body is connected to the flame arrester, the main fan, the buffer tank, the exhaust gas cyclone mixer and the demister in sequence through pipelines, the back-purge fan is connected to the bottom of the furnace body through a pipeline, the bottom of the furnace body is connected to the air mixing box through a pipeline, and the air mixing box is connected to an external alkali washing tower.

[0008] In a preferred embodiment, the monitoring system includes a plurality of instrument valves and an FSG system, wherein the plurality of instrument valves are respectively installed on respective pipelines connected to the furnace body, and the plurality of instrument valves are intelligent valves with signal output and receiving functions. The signal output and reception between the plurality of instrument valves and the FSG system are based on the FF bus protocol, and the instrument valve transmission signal adopts Manchester encoding.

[0009] In a preferred embodiment, filters are installed at the combustion-supporting fan, the back-purge fan, the main fan and the exhaust gas cyclone mixer.

[0010] Technical effects and advantages of the utility model:

[0011] The utility model adopts FF fieldbus type instrument, which is different from the previous 4-20mA one-way transmission. The fieldbus can achieve direct mutual access and control between instrument valves, reduce noise interference in the transmission process, improve the accuracy of the instrument, and truly realize on-site control; by selecting the FF bus through the instrument and other sensors, the instrument can output multiple signals. In addition to the control signal, it can also output its own health signal, which is convenient for customers to realize system health management and life cycle management. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0013] Explanation of the reference numerals: 1 furnace body, 2 burner, 3 combustion-supporting fan, 4 air mixing box, 5 flame arrester, 6 main fan, 7 buffer tank, 8 exhaust gas cyclone mixer, 9 demister, 10 back-purge fan, 11 activated carbon adsorption box, 12 FSG system. DETAILED DESCRIPTION

[0014] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. The embodiments of the present invention are provided for the purpose of illustration and description, and are not intended to be exhaustive or to limit the present invention to the disclosed forms. Many modifications and variations are obvious to those of ordinary skill in the art. The embodiments are selected and described in order to better illustrate the principles and practical applications of the present invention, and to enable those of ordinary skill in the art to understand the present invention and thereby design various embodiments with various modifications suitable for specific purposes.

[0015] like Figure 1 The RTO oxidation furnace based on the FF bus protocol shown in the figure includes a furnace body 1 system and a monitoring system. The monitoring system transmits and receives signals between instruments and meters through the FF bus protocol.

[0016] The furnace body 1 system includes a furnace body 1, a burner 2, a combustion-supporting fan 3, an air mixing box 4, a flame arrester 5, a main fan 6, a buffer tank 7, an exhaust gas cyclone mixer 8, a demister 9, a back-purge fan 10, an activated carbon adsorption box 11 and a plurality of filters in sequence;

[0017] The burner 2 is installed on the top of the furnace body 1, the combustion-supporting fan 3 is connected to the burner 2, the bottom of the furnace body 1 is connected to the flame arrester 5, the main fan 6, the buffer tank 7, the exhaust gas cyclone mixer 8 and the demister 9 in sequence through pipelines, the back-purge fan 10 is connected to the bottom of the furnace body 1 through a pipeline, the bottom of the furnace body 1 is connected to the air mixing box 4 through a pipeline, the air mixing box 4 is connected to the external alkali washing tower, and filters are installed at the combustion-supporting fan 3, the back-purge fan 10, the main fan 6 and the exhaust gas cyclone mixer 8.

[0018] The monitoring system includes a plurality of instrument valves and an FSG system 12. The plurality of instrument valves are respectively installed on various pipelines connected to the furnace body 1. The plurality of instrument valves are FF fieldbus instrument valves with signal output and receiving functions. The signal output and reception between the plurality of instrument valves and the FSG system 12 are based on the FF bus protocol. The transmission signal of the instrument valve adopts Manchester coding.

[0019] Furthermore, the FF fieldbus completes the power supply and two-way digital communication of multiple furnace body 1 instrument valves on a shielded twisted pair cable. The network card equipped with the FSG system 12 is usually only responsible for the two-way communication with the furnace body 1 instrument valve, and the power supply of the bus needs to be completed by a dedicated FF distributor;

[0020] The bus is divided into segments. Each network card has two ports, each port connects to a segment, and each segment needs to be equipped with an FF distributor. Both ends of the bus also need to be equipped with a terminal resistor to eliminate the echo of high-frequency signals.

[0021] The FF fieldbus instrument is used. Different from the previous 4-20mA one-way transmission, the fieldbus can achieve direct mutual access and control between instrument valves, reduce noise interference during transmission, improve the accuracy of the instrument, and truly realize field control; by selecting the FF bus through instruments and other sensors, the instrument can output multiple signals. In addition to control signals, it can also output its own health signals, which is convenient for customers to achieve system health management and life cycle management. The FF communication protocol has open digital communication capabilities, giving the automation system network characteristics. It is based on the OSI open system interconnection model, taking its physical layer, data link layer, and application layer, and adding a user layer to the application layer. The FF fieldbus instrument valve transmission signal uses Manchester encoding, and the center position of each bit of sent data will jump to maintain time synchronization between the sender and the receiver;

[0022] On the basis of the above, the FF bus is selected to improve the accuracy of signal transmission and shorten the error and time of signal transmission, thereby improving the safety of the system (RTO open flame equipment has high safety requirements), integrating remote control, parameterization and fault diagnosis of field equipment. The field bus uses computer digital communication technology to connect intelligent field equipment. Therefore, the controller can obtain a large amount of information from the field equipment, realize the transmission of equipment status, fault, and parameter information, and complete the remote control, parameterization and fault diagnosis of the equipment.

[0023] Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field and related fields without creative work should fall within the scope of protection of the present invention. Structures, devices and operating methods not specifically described and explained in the present invention shall be implemented according to conventional means in the field unless otherwise specified and limited.

Claims

1. An RTO oxidation furnace based on FF bus protocol, characterized in that: It includes furnace system and monitoring system. The monitoring system transmits and receives signals between instruments through FF bus protocol. The furnace system includes a furnace body, a burner, a combustion-supporting fan, an air mixing box, a flame arrester, a main fan, a buffer tank, an exhaust gas cyclone mixer, a demister, a back-purge fan, an activated carbon adsorption box and a plurality of filters in sequence; The burner is installed on the top of the furnace body, the combustion-supporting fan is connected to the burner, the bottom of the furnace body is connected to the flame arrester, the main fan, the buffer tank, the exhaust gas cyclone mixer and the demister in sequence through pipelines, the back-purge fan is connected to the bottom of the furnace body through pipelines, the bottom of the furnace body is connected to the air mixing box through pipelines, and the air mixing box is connected to the external alkali washing tower; The monitoring system includes several instrument valves and FSG system. The several instrument valves are respectively installed on various pipelines connected to the furnace body. The several instrument valves are intelligent valves with signal output and receiving functions. The signal output and reception between the several instrument valves and the FSG system are based on the FF bus protocol, and the instrument valve transmission signal adopts Manchester encoding.

2. The RTO oxidation furnace based on the FF bus protocol according to claim 1, characterized in that: Filters are installed at the combustion-supporting fan, the back-purge fan, the main fan and the exhaust gas cyclone mixer.

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