Automatic control system and method for waste tin material smelting fuming furnace and readable storage medium

Abstract

The invention discloses an automatic control system and method for a waste tin material smelting fuming furnace and a readable storage medium, and the system comprises a fuming furnace material preparation control unit which is used for controlling five constant feeders to carry out material preparation; the fuming furnace feeding control unit is used for controlling the four constant feeders to feed; the circulating water safety interlocking control unit is used for ensuring the normal operation of the water pump in the field production process; the fuming furnace air supply control unit is used for supplying primary air to spray pulverized coal into the furnace and supplying secondary air to smelt; the fuming furnace tertiary fan automatic adjusting unit is used for providing tertiary air to adjust the concentration of carbon monoxide in a flue of the fuming furnace; and the DCS control module is used for automatic control. According to the method, a feasible scheme is provided for the practice process of automatic control over fuming furnace smelting of the waste tin materials, the participation links of manpower in the production process are greatly reduced, meanwhile, the operation efficiency is improved, and the smelting yield is further improved.

Description

Technical Field

[0001] The present invention relates to the field of smelting control technology, and more specifically, to an automated control system, method and readable storage medium for a waste tin smelting fuming furnace. Background Art

[0002] like Figure 1 As shown, it shows the process flow of tin smelting fuming furnace. At present, the batching process and feeding process of smelting waste tin fuming furnace in China are all manually operated.

[0003] Among them, the proportion of ingredients cannot be accurately controlled, and someone must be on duty on site in real time, which will cause unnecessary waste of manpower. Summary of the invention

[0004] The purpose of the present invention is to provide an automated control system, method and readable storage medium for a waste tin smelting fuming furnace, which provides a practical solution for the practical process of automated control of waste tin smelting in a fuming furnace, greatly reduces the human involvement in the production process, while improving operating efficiency and further increasing smelting output.

[0005] The first aspect of the present invention provides an automatic control system for a waste tin smelting fuming furnace, comprising:

[0006] The fumigation furnace material preparation and batching control unit is used to control five quantitative feeders for material preparation;

[0007] Fuming furnace feeding control unit, used to control four quantitative feeders to feed;

[0008] Circulating water safety interlock control unit, used to ensure the normal operation of the water pump during on-site production;

[0009] The air supply control unit of the fuming furnace is used to supply primary air to spray pulverized coal into the furnace and to supply secondary air for smelting;

[0010] The tertiary fan automatic adjustment unit of the fuming furnace is used to provide tertiary air to adjust the carbon monoxide concentration in the flue of the fuming furnace;

[0011] The DCS control module is used to automatically control the fuming furnace material preparation and batching control unit, the fuming furnace feeding control unit, the circulating water safety interlocking control unit, the fuming furnace air supply control unit and the fuming furnace tertiary fan automatic adjustment unit.

[0012] In this scheme, the five quantitative feeders are 1# quantitative feeder, 3# quantitative feeder, 5# quantitative feeder, 7# quantitative feeder and 9# quantitative feeder, wherein the material name corresponding to 1# quantitative feeder is electric furnace slag / pyrite, the material name corresponding to 3# quantitative feeder is tin-containing tailings, the material name corresponding to 5# quantitative feeder is flux, the material name corresponding to 7# quantitative feeder is spare, and the material name corresponding to 9# quantitative feeder is pyrite, and the fuming furnace material preparation and batching control unit also includes a disc feeder, a large-angle belt conveyor, and a Reverse belt conveyor, four material preparation bins, four radar level meters and two limit switches, wherein the high-angle belt conveyor is 3# belt conveyor, used to transport materials from the raw material warehouse to the fuming furnace plant; the reversible belt conveyor is 1# reversible belt conveyor with a walking trolley, used to deliver materials to different material preparation bins respectively; the four material preparation bins are used to store materials that have been mixed in proportion, specifically including 1# mixing bin, 5# mixing bin, 3# vulcanizing agent bin and 7# vulcanizing agent bin; the radar level meter is used to measure the material level of the material preparation bin; the limit switch includes Omron, which is used to limit the reversible belt conveyor.

[0013] In this solution, the four quantitative feeders correspond to the 1# quantitative feeder, the 3# quantitative feeder, the 5# quantitative feeder, and the 7# quantitative feeder, respectively, wherein the 1# quantitative feeder is connected to the 1# mixing bin, the 3# quantitative feeder is connected to the 3# vulcanizing agent bin, the 5# quantitative feeder is connected to the 5# mixing bin, the 7# quantitative feeder is connected to the 7# vulcanizing agent bin, and the fuming furnace feeding control unit also includes two mobile belt feeders and four limit switches, wherein the limit switches specifically include Omron, which is used to limit the mobile belt feeders.

[0014] In this solution, the circulating water safety interlock control unit includes three electric pumps and one diesel pump, wherein, during production, the three electric pumps include two circulating pumps and one standby pump, and the diesel pump is in hot standby state.

[0015] In this solution, the fuming furnace air supply control unit includes a fan PLC device and a coal injection PLC device, wherein the fan PLC device is used to receive the sum of the primary air and secondary air volumes issued by the DCS control module to control the fan guide vane opening value, and the coal injection PLC device is used to receive the air-coal ratio set value issued by the DCS control module to control the motor speed.

[0016] In this solution, the tertiary fan automatic adjustment unit of the fume furnace includes a main air duct, a variable frequency fan flow meter and an analyzer, wherein the analyzer includes a carbon monoxide and sulfur dioxide analyzer, the main air duct is connected to multiple air inlets, the flow meter is used to measure the air volume value corresponding to the main confluence of the main air duct, and the analyzer is used to online analyze the carbon monoxide concentration and sulfide concentration in the flue gas.

[0017] The second aspect of the present invention is a method for automatically controlling a fuming furnace for smelting tin waste, which is applied to the automatic control system for a fuming furnace for smelting tin waste as claimed in any one of the above claims, wherein the method comprises the following steps:

[0018] Control five quantitative feeders to prepare materials;

[0019] Control four quantitative feeders to add materials;

[0020] Ensure the normal operation of the water pump during on-site production;

[0021] Provide primary air to spray pulverized coal into the furnace and secondary air for smelting;

[0022] Tertiary air is provided to adjust the carbon monoxide concentration in the flue of the fuming furnace.

[0023] In this scheme, the five quantitative feeders are 1# quantitative feeder, 3# quantitative feeder, 5# quantitative feeder, 7# quantitative feeder and 9# quantitative feeder, wherein the material name corresponding to 1# quantitative feeder is electric furnace slag / pyrite, the material name corresponding to 3# quantitative feeder is tin-containing tailings, the material name corresponding to 5# quantitative feeder is flux, the material name corresponding to 7# quantitative feeder is spare, and the material name corresponding to 9# quantitative feeder is pyrite, and a high-angle belt conveyor is used to transport the materials from the raw material warehouse to the fuming furnace plant; and a reversible belt conveyor is used to deliver the materials to different preparation bins, wherein four preparation bins are used to store materials that have been prepared in proportion, specifically including 1# mixing bin, 5# mixing bin, 3# vulcanizing agent bin and 7# vulcanizing agent bin; and a radar level meter is used to measure the material level of the preparation bin; and a limit switch is used to limit the reversible belt conveyor.

[0024] In this solution, the four quantitative feeders correspond to the 1# quantitative feeder, the 3# quantitative feeder, the 5# quantitative feeder, and the 7# quantitative feeder, respectively, wherein the 1# quantitative feeder is connected to the 1# mixing bin, the 3# quantitative feeder is connected to the 3# vulcanizing agent bin, the 5# quantitative feeder is connected to the 5# mixing bin, and the 7# quantitative feeder is connected to the 7# vulcanizing agent bin. When feeding, two mobile belt feeders are used for feeding, and four limit switches are used to limit the mobile belt feeders.

[0025] A computer-readable storage medium, characterized in that the computer-readable storage medium includes a program for an automated control method for a waste tin material smelting fuming furnace, and when the program for the automated control method for a waste tin material smelting fuming furnace is executed by a processor, the steps of the automated control method for a waste tin material smelting fuming furnace as described in any one of the above items are implemented.

[0026] The invention discloses an automated control system, method and readable storage medium for a waste tin smelting fuming furnace, which provide a practical solution for the practice of automated control of waste tin smelting in a fuming furnace, greatly reduce the involvement of manpower in the production process, improve operating efficiency, and further increase smelting output. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 A schematic diagram showing the process flow of a tin smelting fuming furnace;

[0028] Figure 2 A block diagram of an automatic control system for a waste tin smelting fuming furnace according to the present invention is shown;

[0029] Figure 3 A schematic diagram of material preparation for an automatic control system of a waste tin smelting fuming furnace according to the present invention is shown;

[0030] Figure 4 A schematic diagram of feeding of an automatic control system for a waste tin smelting fuming furnace according to the present invention is shown;

[0031] Figure 5 A schematic diagram showing the application of an electric pump in an automatic control system of a waste tin smelting fuming furnace according to the present invention is shown;

[0032] Figure 6 The flowchart of the automatic control method of the waste tin smelting fuming furnace of the present invention is shown. DETAILED DESCRIPTION

[0033] In order to more clearly understand the above-mentioned purpose, features and advantages of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0034] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the protection scope of the present invention is not limited to the specific embodiments disclosed below.

[0035] like Figure 1As shown, the main process flow of the tin smelting fuming furnace includes the following steps: the tin-containing tailings are sent from the beneficiation workshop to the raw material warehouse for storage through a belt conveyor, and the hematite, return electric furnace slag, sulfurizing agent, etc. are sent to the raw material warehouse for storage by vehicles. After quantitative batching, they enter the batching bin and are then sent to the fuming furnace for sulfurization and volatilization; the fuming furnace operates in cycles, and each cycle includes melting, sulfurization and volatilization, and slag discharge processes; the flue gas of the fuming furnace is respectively sent to the desulfurization system for treatment after the waste heat boiler recovers waste heat and the dust collection system collects dust; the tin-containing smoke collected by the boiler and the dust collection system is sent to the zinc-containing smoke leaching workshop; the slag produced by the fuming furnace flows through the hot slag chute to the insulation electric furnace for sedimentation and separation, and the metallic copper and nickel are recovered in the form of matte. The discarded slag is harmless slag, which is sold after water quenching. To this end, how to provide an efficient and proportionally precise control scheme to reliably realize the operations of material preparation, batching, and feeding, and then obtain an intelligent automatic control system for the waste tin smelting fuming furnace, is a problem that needs to be solved urgently.

[0036] Figure 2 A block diagram of an automatic control system for a waste tin smelting fuming furnace of the present application is shown.

[0037] like Figure 2 As shown, the present application discloses an automatic control system for a waste tin smelting fuming furnace, comprising:

[0038] The fumigation furnace material preparation and batching control unit is used to control five quantitative feeders for material preparation;

[0039] Fuming furnace feeding control unit, used to control four quantitative feeders to feed;

[0040] Circulating water safety interlock control unit, used to ensure the normal operation of the water pump during on-site production;

[0041] The air supply control unit of the fuming furnace is used to supply primary air to spray pulverized coal into the furnace and to supply secondary air for smelting;

[0042] The tertiary fan automatic adjustment unit of the fuming furnace is used to provide tertiary air to adjust the carbon monoxide concentration in the flue of the fuming furnace;

[0043] The DCS control module is used to automatically control the fuming furnace material preparation and batching control unit, the fuming furnace feeding control unit, the circulating water safety interlocking control unit, the fuming furnace air supply control unit and the fuming furnace tertiary fan automatic adjustment unit.

[0044] It should be noted that, in this embodiment, the purpose of this application is to provide an efficient and proportionally precise control scheme to reliably realize operations such as material preparation and batching, material feeding, air supply, coal supply, etc., to achieve safe and orderly interlocking, improve production operation efficiency, reduce manual work, and thus obtain an intelligent waste tin smelting fuming furnace automatic control system, which is specifically controlled by a DCS control module, and is completed through the fuming furnace material preparation and batching control unit, the fuming furnace feeding control unit, the circulating water safety interlocking control unit, the fuming furnace air supply control unit and the fuming furnace tertiary fan automatic adjustment unit. Among them, the DCS control module is based on the Hollysys K series products, and the automatic control of each area is realized through the DCS system. It mainly includes: field monitoring station, field control station, operator station, engineer station, host computer, and communication network. Specifically, the field monitoring station is directly connected to the production process to realize data collection of non-controlled variables in the process to complete data collection and preprocessing, and further process the real-time data to provide data for the operation station, realize monitoring and printing of process variables and status, realize open-loop monitoring, or provide auxiliary data and information for control loop operations; the field control station is also directly connected to the production process, not only to detect and process the control variables, but also to output control signals to drive the actuators on site to independently realize closed-loop control of the production process; the operation station is the main equipment for operators to perform process monitoring and process control operations. The operation station provides a good human-machine interface to realize functions such as centralized display, centralized operation and centralized management; the engineer station is mainly used for offline configuration of DCS and online system supervision, control and maintenance. Engineers can use configuration software to configure the system offline and monitor the operation of each station on the DCS network in real time when the DCS is online; the host computer is used for information management and optimization control of the entire system; the communication network is the backbone of the distributed control system. By connecting the monitoring station and control station, operation station, engineer station, host computer and other parts of the DCS, it completes the transmission of data, instructions and other information between the parts, and shares data and information, thereby realizing coordinated and consistent operation of the entire system.

[0045] According to an embodiment of the present invention, the five quantitative feeders are respectively 1# quantitative feeder, 3# quantitative feeder, 5# quantitative feeder, 7# quantitative feeder and 9# quantitative feeder, wherein the material name corresponding to 1# quantitative feeder is electric furnace slag / pyrite, the material name corresponding to 3# quantitative feeder is tin-containing tailings, the material name corresponding to 5# quantitative feeder is flux, the material name corresponding to 7# quantitative feeder is spare, the material name corresponding to 9# quantitative feeder is pyrite, and the fuming furnace material preparation and batching control unit also includes a disc feeder, a large-angle belt conveyor, a A reversible belt conveyor, four material preparation bins, four radar level meters and two limit switches, wherein the high-angle belt conveyor is a 3# belt conveyor, which is used to transport materials from the raw material warehouse to the fuming furnace plant; the reversible belt conveyor is a 1# reversible belt conveyor with a walking trolley, which is used to deliver materials to different material preparation bins respectively; the four material preparation bins are used to store materials that have been mixed in proportion, specifically including a 1# mixing bin, a 5# mixing bin, a 3# vulcanizing agent bin and a 7# vulcanizing agent bin; the radar level meter is used to measure the material level of the material preparation bin; the limit switch includes an Omron, which is used to limit the reversible belt conveyor.

[0046] It should be noted that, in this embodiment, the five quantitative feeders are respectively 1# quantitative feeder, 3# quantitative feeder, 5# quantitative feeder, 7# quantitative feeder and 9# quantitative feeder, wherein the materials corresponding to 1#, 3#, 5#, 7# and 9# quantitative feeders are electric furnace slag / pyrite, tin-containing tailings, flux, spare and pyrite, respectively. In addition, the fuming furnace material preparation and batching control unit is also composed of a disc feeder, a large-angle belt conveyor (3# belt conveyor) and a 2# 2# 3# 4# 5# 7# 9# 1# 1# 2# 3# 5# 7# 9# 1# 1# 2# 3# 5# 7# 9# 1# 1# 2# 3# 3# 4 ... , transporting materials from the raw material warehouse to the fuming furnace plant), a reversible belt conveyor (1# reversible belt conveyor with a walking trolley to transport materials to different preparation bins), four preparation bins (1# and 5# are mixing bins, 3# and 7# are vulcanizing agent bins, which are used to store materials that have been prepared in proportion), in addition, it also includes four radar level meters (Siemens, "0-4.3m"; used to measure the material level in the preparation bin); two limit switches (Omron, used to limit the reversible belt conveyor).

[0047] Specifically, take the quantitative feeder for material preparation as an example. Figure 3As shown, before starting the batching and preparation program, the control mode of the quantitative feeder, the instantaneous flow setting value and the material level value of the silo should be selected according to actual needs. Taking mixing and batching as an example, after the preparation work is done and the site safety is confirmed, a pulse signal (batching allowed) is sent out on site. The user can click on the batching to start, and the 1# reversible belt conveyor with the walking trolley rotates forward until the limit switch is activated and stops moving (at this time, the discharge port rotates forward to align with the 1# mixing silo, and reverses to align with the 5# mixing silo). After "2s", the 1# reversible belt conveyor automatically rotates forward and starts, and after a delay of "2s", the high-angle belt conveyor automatically starts, and after another delay of "2s", the 1#, 3#, and 5# quantitative feeders automatically start at the same time, and after "2s", the disc feeder automatically starts, and the first batching start process is completed.

[0048] Among them, when the material level of 1# mixing bin reaches the set material level value, the disc feeder stops automatically, and after a delay of "2s", 1#, 3#, and 5# quantitative feeders stop automatically at the same time, and after a delay of "2s", the high-angle belt conveyor stops automatically, and after a delay of "2s", the reversible belt conveyor stops rotating automatically, and the preparation of 1# mixing bin is completed; and after the user confirms safety on site, a pulse signal is sent on site (batching is allowed), and after "2s", the reversible belt conveyor automatically reverses and starts (the discharge port reverses and aligns with 5# mixing bin), and after a delay of "2s", the high-angle belt conveyor starts automatically, and after another delay of "2s", 1#, 3#, and 5# quantitative feeders start automatically at the same time, and after "2s", the disc feeder starts automatically, and the second batching start-up process is completed.

[0049] When the material level in the 3# mixing bin reaches the set material level value, the disc feeder stops automatically, and after a delay of "2s", the 1#, 3#, and 5# quantitative feeders stop automatically at the same time. After a delay of "80s", the high-angle belt conveyor stops automatically, and after a delay of "15s", the reversible belt conveyor stops rotating forward automatically, and the material preparation in the 5# mixing bin is completed.

[0050] During operation, the quantitative feeder will compare data based on the instantaneous flow setting value and the instantaneous value of the real-time flow, and automatically adjust the speed of the quantitative feeder through the PID automatic adjustment function of the DCS control module, so that the proportion of ingredients is accurate and the materials are evenly mixed. In addition, this embodiment also has a chain function. When a belt fails or loses power during operation and stops, the DCS control module will pop up an alarm and the equipment in the front process will automatically stop to avoid a large amount of material accumulation.

[0051] According to an embodiment of the present invention, the four quantitative feeders correspond to the 1# quantitative feeder, the 3# quantitative feeder, the 5# quantitative feeder, and the 7# quantitative feeder, respectively, wherein the 1# quantitative feeder is connected to the 1# mixing bin, the 3# quantitative feeder is connected to the 3# vulcanizing agent bin, the 5# quantitative feeder is connected to the 5# mixing bin, the 7# quantitative feeder is connected to the 7# vulcanizing agent bin, and the fuming furnace feeding control unit also includes two mobile belt feeders and four limit switches, wherein the limit switches specifically include Omron, which is used to limit the mobile belt feeders.

[0052] It should be noted that, in this embodiment, the fumigation furnace feeding process is composed of four quantitative feeders (respectively 1#, 3#, 5#, and 7# quantitative feeders, corresponding to 1# mixing bin, 3# vulcanizing agent bin, 5# mixing bin, and 7# vulcanizing agent bin, respectively), and two mobile tape feeders. The main electrical components and instruments include four limit switches (Omron; used to limit the mobile tape feeders). Before the feeding program is started, the control mode and instantaneous flow set value of the quantitative feeder must be selected according to actual needs. Taking the mixing feeding as an example, after the preparation work is done and the safety of the site is confirmed, a pulse signal (feeding allowed) is sent out on site. Figure 4 As shown, after the feeding starts, the walking motors of the two mobile belt feeders rotate forward until the limit switch is activated and then stop (at this time, the unloading port rotates forward to the feeding port of the fuming furnace), and the feeding belt automatically rotates forward after "2s". After a delay of "2s", the 1# and 5# quantitative feeders are automatically started at the same time, and the feeding start process is completed. When the feeding is completed, click the feeding stop button, and after a delay of "2s", the 1# and 5# quantitative feeders are automatically stopped at the same time, and the feeding belt is automatically stopped after a delay of "15s". After a delay of "2s", the walking motors of the two mobile belt feeders are reversed to the original position limit switch and then stop. At this time, the mobile belt feeders return to their original positions, and the feeding process is completed. In addition, this embodiment is also provided with a chain function. If the ionic liquid fan of the rear process fails and stops during the feeding process, the on-site sound and light alarm will activate the alarm for "15s", and at the same time, the two mobile belt feeders will automatically stop and the walking motors will automatically return to their original positions to prevent the belt conveyor from burning due to high temperature.

[0053] According to an embodiment of the present invention, the circulating water safety interlock control unit includes three electric pumps and one diesel pump, wherein, during production, the three electric pumps include two circulating pumps and one standby pump, and the diesel pump is in hot standby state.

[0054] It should be noted that in this embodiment, in the tin smelting water supply system, the circulating cold water pump and the circulating hot water pump are the most important production equipment, which are directly related to the key process parameters such as water supply pressure and flow rate. Once the circulating water pump group fails, it often causes the water pressure and flow rate of the entire circulating water station to change dramatically, which will directly have a huge impact on the safe production and operation of the fuming furnace. Therefore, the circulating cold water pump and the circulating hot water pump of the fuming furnace circulating water station adopt a redundant configuration (two open and one standby), that is, when the water supply pump is operating normally, it is always guaranteed that there is a standby pump in a standby state. Once the operating pump fails, the standby pump will be automatically put into operation immediately. If the standby self-throwing function of the standby pump is controlled manually on site, the operation time is too long and the reliability is poor, which cannot meet the on-site production requirements; if the traditional relay control is used, it is not only costly, but also complicated in design and construction, and there are many hidden dangers of failure, poor reliability, and slow response speed. Therefore, it is necessary to propose an automatic control system to solve the current problems.

[0055] Specifically, the DCS controlled production equipment (DCS control module) used in this embodiment can realize remote centralized control, greatly improve the reliability and safety of on-site production, and the system control reliability is high and the response speed is fast. Therefore, the DCS realizes the backup automatic switching function of the circulating water pump, which can not only realize the full automation operation of the circulating water pump, but also has high reliability and fast response speed, ensuring the normal operation of the water pump during on-site production and reducing the occurrence of production accidents.

[0056] Among them, the cooling circulating water system of the fuming furnace is equipped with three 90KW electric pumps and one diesel pump. During normal production, two are in operation and one is in standby mode, and the diesel pump is in hot standby mode. The operation location of the two circulating electric pumps used in normal operation is selected to the remote manual mode, and the standby pump operation mode is remote, fault-free, and the DCS screen is put into automatic control and interlocking. Among them, the operation state of the running pump is in the remote manual mode to prevent switching back and forth after shutdown due to external faults.

[0057] Furthermore, if Figure 5 As shown in the figure, the process of automatic switching of the standby electric pump is as follows: after the operation signal of any one of the two running electric pumps or the two electric pumps is lost for "2s", the standby electric pump starts and automatically opens the standby pump outlet valve or opens to a certain degree (27%) after receiving the operation signal feedback for "2s". After the standby circulation pump outlet valve opens to "27%", the standby pump starts automatically. And when the three electric pumps lose power at the same time and then power on, the standby pump starts automatically; the original two running electric pumps do not start automatically.

[0058] Furthermore, the preparation conditions for the diesel pump standby automatic start-up correspond to: the diesel pump operation location is switched to remote, there is no fault, and the DCS screen is put into automatic control and interlocking. Among them, after the whole plant is powered off, the diesel generator is automatically started by the mains power loss signal. The two electric pumps stop working for more than "48s", and the diesel pump is automatically started. The operation signals of the three circulating pumps are lost at the same time for "5s", and the DCS considers that there is a power outage and automatically starts the diesel pump. And after the power supply of the circulating water distribution room section I and II is lost at the same time for "2s", the diesel pump is automatically started.

[0059] According to an embodiment of the present invention, the fuming furnace air supply control unit includes a fan PLC device and a coal injection PLC device, wherein the fan PLC device is used to receive the sum of the air volumes of the primary air and the secondary air issued by the DCS control module to control the fan guide vane opening value, and the coal injection PLC device is used to receive the air-coal ratio set value issued by the DCS control module to control the motor speed.

[0060] It should be noted that, in the present embodiment, the air supply of the fuming furnace includes primary air which is mainly used to spray coal powder into the furnace, and secondary air which is mainly smelting air. The primary air and secondary air are supplied by a centrifugal air compressor. Specifically, for a long time, the air supply fan of the fuming furnace for tin smelting has a large deviation from the air pressure and air volume parameters of the fan in the actual production process. During the smelting process, the secondary air inlet of the fuming furnace will automatically increase due to the reduction of the cross-sectional area of ​​the air inlet due to slag adhesion. The operating point of the fan is prone to enter the surge zone, causing the fan to surge and stop supplying air, and the fuming furnace is forced to stop production failures. In the present embodiment, the air pressure and air volume selected by the air supply fan of the fuming furnace are close to the actual ones and the air pressure surplus is large. In order to improve the automation level of the fuming furnace, the design in the present embodiment Automatic ratio control of air volume and coal volume (referred to as automatic air-coal ratio control), the specific control scheme is as follows: 1) Design a set of air-coal ratio control modules in the DCS of the fuming furnace. The operator manually and regularly modifies the coal volume setting value according to the different smelting stages of the fuming furnace. The DCS automatically calculates the total amount of primary air + secondary air according to the air-coal ratio. The total air volume value is automatically transmitted to the PLC control device of the air supply fan through communication, and then the fan guide vane opening is automatically adjusted to make the actual total air volume automatically track to the vicinity of the given value; 2) The manually modified given coal volume value of the DCS is automatically transmitted to the automatic coal injection device through communication, so that the coal volume automatically tracks the set value; 3) Through the above two automatic controls, the air-coal ratio is close to the design point, so that the smelting process of the fuming furnace is efficient and safe.

[0061] According to an embodiment of the present invention, the tertiary fan automatic adjustment unit of the fume furnace includes a main air duct, a variable frequency fan flow meter and an analyzer, wherein the analyzer includes a carbon monoxide and sulfur dioxide analyzer, the main air duct is connected to multiple air inlets, the flow meter is used to measure the air volume value corresponding to the main confluence of the main air duct, and the analyzer is used to online analyze the carbon monoxide concentration and sulfide concentration in the flue gas.

[0062] It should be noted that, in the present embodiment, the tertiary wind of the fuming furnace is mainly used to fully burn the CO and sulfide in the flue gas. For a long time, the tertiary wind of the domestic tin smelting fuming furnace has adopted natural suction, and the ventilation area of ​​the suction louver is manually adjusted to control the suction volume. This method has many problems. Under the same suction area, if the pressure in the furnace changes, the actual suction volume will change; if the pressure in the furnace is slightly high, the external wind cannot be replenished in time, and the flue gas in the furnace will spray out instead. On the one hand, the production cannot be normally regulated, and on the other hand, the low-altitude pollution around the furnace is serious. The new control scheme for the tertiary wind proposed in this embodiment is also original. Specifically, in the ascending flue of the furnace, the tertiary wind is controlled by the tertiary wind control method, and the tertiary wind is controlled by the tertiary wind control method. A number of air inlets are arranged at appropriate places around the furnace and surrounded by a main air duct. The main air duct is connected to a variable frequency low-pressure fan. A flow meter is installed at the main duct. The frequency of the fan motor is adjusted manually or automatically to make the fan output an adjustable air volume device. When starting and stopping production, the operator can fine-tune the frequency according to the actual situation in the furnace to make the tertiary air close to the air volume required for production. Among them, the analyzer is arranged at a suitable place in the flue of the fuming furnace outlet, specifically a set of online CO and SO2 analyzers, and a step-by-step control scheme can be set up inside the DCS. According to the change of CO concentration, the frequency value is adjusted step by step to control the CO concentration within the safe value.

[0063] like Figure 6 As shown, the present invention discloses an automatic control method for a waste tin smelting fuming furnace, which is applied to any of the automatic control systems for the waste tin smelting fuming furnace described above, wherein the method comprises the following steps:

[0064] S602, controlling five quantitative feeders to prepare materials;

[0065] S604, controlling four quantitative feeders to add materials;

[0066] S606, ensure the normal operation of the water pump during on-site production;

[0067] S608, supplying primary air to spray pulverized coal into the furnace and supplying secondary air for smelting;

[0068] S610, providing tertiary air to adjust the carbon monoxide concentration in the flue of the fuming furnace.

[0069] It should be noted that, in this embodiment, the specific control steps have been described in detail in the above embodiments and will not be repeated in this embodiment.

[0070] A third aspect of the present invention provides a computer-readable storage medium, which includes a program for an automated control method for a waste tin smelting fuming furnace. When the program for an automated control method for a waste tin smelting fuming furnace is executed by a processor, the steps of the automated control method for a waste tin smelting fuming furnace as described in any one of the above items are implemented.

[0071] The invention discloses an automated control system, method and readable storage medium for a waste tin smelting fuming furnace, which provide a practical solution for the practice of automated control of waste tin smelting in a fuming furnace, greatly reduce the involvement of manpower in the production process, improve operating efficiency, and further increase smelting output.

[0072] In the several embodiments provided in the present application, it should be understood that the disclosed devices and methods can be implemented in other ways. The device embodiments described above are only schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation, such as: multiple units or components can be combined, or can be integrated into another system, or some features can be ignored or not executed. In addition, the coupling, direct coupling, or communication connection between the components shown or discussed can be through some interfaces, and the indirect coupling or communication connection of the devices or units can be electrical, mechanical or other forms.

[0073] The units described above as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units; they may be located in one place or distributed on multiple network units; some or all of the units may be selected according to actual needs to achieve the purpose of the present embodiment.

[0074] In addition, all functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may be separately used as a unit, or two or more units may be integrated into one unit; the above-mentioned integrated units may be implemented in the form of hardware or in the form of hardware plus software functional units.

[0075] A person of ordinary skill in the art can understand that: all or part of the steps of implementing the above method embodiments can be completed by hardware related to program instructions, and the aforementioned program can be stored in a computer-readable storage medium. When the program is executed, it executes the steps of the above method embodiments; and the aforementioned storage medium includes: mobile storage devices, read-only memories (ROM, Read-Only Memory), random access memories (RAM, Random Access Memory), magnetic disks or optical disks, and other media that can store program codes.

[0076] Alternatively, if the above-mentioned integrated unit of the present invention is implemented in the form of a software function module and sold or used as an independent product, it can also be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the embodiment of the present invention can be essentially or partly reflected in the form of a software product that contributes to the prior art. The computer software product is stored in a storage medium and includes several instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the methods described in each embodiment of the present invention. The aforementioned storage medium includes: various media that can store program codes, such as mobile storage devices, ROM, RAM, magnetic disks or optical disks.

Claims

1. An automatic control system for a waste tin smelting fuming furnace, characterized in that: include: The fumigation furnace material preparation and batching control unit is used to control five quantitative feeders for material preparation; Fuming furnace feeding control unit, used to control four quantitative feeders to feed; Circulating water safety interlock control unit, used to ensure the normal operation of the water pump during on-site production; The air supply control unit of the fuming furnace is used to supply primary air to spray pulverized coal into the furnace and to supply secondary air for smelting; The tertiary fan automatic adjustment unit of the fuming furnace is used to provide tertiary air to adjust the carbon monoxide concentration in the flue of the fuming furnace; The DCS control module is used to automatically control the fuming furnace material preparation and batching control unit, the fuming furnace feeding control unit, the circulating water safety interlocking control unit, the fuming furnace air supply control unit and the fuming furnace tertiary fan automatic adjustment unit.

2. The automatic control system for the waste tin smelting fuming furnace according to claim 1 is characterized in that: The five quantitative feeders are respectively 1# quantitative feeder, 3# quantitative feeder, 5# quantitative feeder, 7# quantitative feeder and 9# quantitative feeder, wherein the material name corresponding to 1# quantitative feeder is electric furnace slag / pyrite, the material name corresponding to 3# quantitative feeder is tin-containing tailings, the material name corresponding to 5# quantitative feeder is flux, the material name corresponding to 7# quantitative feeder is spare, and the material name corresponding to 9# quantitative feeder is pyrite, and the fuming furnace material preparation and batching control unit also includes a disc feeder, a large-angle belt conveyor, and a reversible belt conveyor. Conveyor, four material preparation bins, four radar level meters and two limit switches, wherein the high-angle belt conveyor is a 3# belt conveyor, which is used to transport materials from the raw material warehouse to the fuming furnace plant; the reversible belt conveyor is a 1# reversible belt conveyor with a walking trolley, which is used to deliver materials to different material preparation bins respectively; the four material preparation bins are used to store materials that have been mixed in proportion, specifically including a 1# mixing bin, a 5# mixing bin, a 3# vulcanizing agent bin and a 7# vulcanizing agent bin; the radar level meter is used to measure the material level of the material preparation bin; the limit switch includes an Omron, which is used to limit the reversible belt conveyor.

3. The automatic control system for the waste tin smelting fuming furnace according to claim 2 is characterized in that: The four quantitative feeders correspond to the 1# quantitative feeder, the 3# quantitative feeder, the 5# quantitative feeder, and the 7# quantitative feeder, respectively, wherein the 1# quantitative feeder is connected to the 1# mixing bin, the 3# quantitative feeder is connected to the 3# vulcanizing agent bin, the 5# quantitative feeder is connected to the 5# mixing bin, the 7# quantitative feeder is connected to the 7# vulcanizing agent bin, and the fuming furnace feeding control unit also includes two mobile belt feeders and four limit switches, wherein the limit switches specifically include Omron, which is used to limit the mobile belt feeders.

4. The automatic control system for the waste tin smelting fuming furnace according to claim 3 is characterized in that: The circulating water safety interlock control unit includes three electric pumps and one diesel pump, wherein, during production, the three electric pumps include two circulating pumps and one standby pump, and the diesel pump is in hot standby state.

5. The automatic control system for the waste tin smelting fuming furnace according to claim 4 is characterized in that: The fuming furnace air supply control unit includes a fan PLC device and a coal injection PLC device, wherein the fan PLC device is used to receive the total air volume of the primary air and the secondary air issued by the DCS control module to control the fan guide vane opening value, and the coal injection PLC device is used to receive the air-coal ratio setting value issued by the DCS control module to control the motor speed.

6. The automatic control system for the waste tin smelting fuming furnace according to claim 5, characterized in that: The tertiary fan automatic adjustment unit of the fume furnace includes a main air duct, a variable frequency fan flow meter and an analyzer, wherein the analyzer includes a carbon monoxide and sulfur dioxide analyzer, the main air duct is connected to multiple air inlets, the flow meter is used to measure the air volume value corresponding to the main confluence of the main air duct, and the analyzer is used to online analyze the carbon monoxide concentration and sulfide concentration in the flue gas.

7. A method for automatically controlling a waste tin smelting fuming furnace, characterized in that: The method is applied to the automatic control system of the waste tin smelting fuming furnace according to any one of claims 1 to 6, wherein the method comprises the following steps: Control five quantitative feeders to prepare materials; Control four quantitative feeders to add materials; Ensure the normal operation of the water pump during on-site production; Provide primary air to spray pulverized coal into the furnace and secondary air for smelting; Tertiary air is provided to adjust the carbon monoxide concentration in the flue of the fuming furnace.

8. The method for automatically controlling a waste tin smelting fuming furnace according to claim 7, characterized in that: The five quantitative feeders are 1# quantitative feeder, 3# quantitative feeder, 5# quantitative feeder, 7# quantitative feeder and 9# quantitative feeder, wherein the material name corresponding to 1# quantitative feeder is electric furnace slag / pyrite, the material name corresponding to 3# quantitative feeder is tin-containing tailings, the material name corresponding to 5# quantitative feeder is flux, the material name corresponding to 7# quantitative feeder is spare, and the material name corresponding to 9# quantitative feeder is pyrite, and a high-angle belt conveyor is used to transport the materials from the raw material warehouse to the fuming furnace plant; and a reversible belt conveyor is used to deliver the materials to different preparation bins, wherein four preparation bins are used to store materials that have been prepared in proportion, specifically including 1# mixing bin, 5# mixing bin, 3# vulcanizing agent bin and 7# vulcanizing agent bin; and a radar level meter is used to measure the material level of the preparation bin; and a limit switch is used to limit the reversible belt conveyor.

9. The method for automatically controlling a waste tin smelting fuming furnace according to claim 8, characterized in that: The four quantitative feeders correspond to the 1# quantitative feeder, the 3# quantitative feeder, the 5# quantitative feeder, and the 7# quantitative feeder, respectively, wherein the 1# quantitative feeder is connected to the 1# mixing bin, the 3# quantitative feeder is connected to the 3# vulcanizing agent bin, the 5# quantitative feeder is connected to the 5# mixing bin, and the 7# quantitative feeder is connected to the 7# vulcanizing agent bin. When feeding, two mobile belt feeders are used for feeding, and four limit switches are used to limit the mobile belt feeders.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium includes a program for an automated control method for a waste tin smelting fuming furnace. When the program for an automated control method for a waste tin smelting fuming furnace is executed by a processor, the steps of an automated control method for a waste tin smelting fuming furnace as described in any one of claims 7 to 9 are implemented.

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