Gas reuse type in-furnace waste gas pretreatment method and melting device

Abstract

The invention relates to a gas reuse type in-furnace waste gas pretreatment method and a melting device, and relates to the technical field of in-furnace waste gas melting treatment.The method comprises the steps that the corresponding oxygen flow in a preset oxygen consumption database is matched according to the raw material filling amount; oxygen is introduced into the first smelting furnace based on the oxygen flow, the raw materials are evenly heated, and the in-furnace waste gas concentration of the first smelting furnace is detected; when the concentration of the waste gas in the furnace is equal to or greater than the reference treatment concentration, transferring the waste gas and the melt into a preset second smelting furnace at a constant speed, and detecting intermediate waste gas in the second smelting furnace; a corresponding neutralization oxygen flow in a preset gas neutralization database is matched, and oxygen is introduced into a preset second smelting furnace according to the neutralization oxygen flow; and the third preset smelting furnace receives the melt and the residual amount of the middle waste gas in the second preset smelting furnace, and when the residual amount of the middle waste gas is within the preset standard residual range, the melt and the residual gas are discharged. The device has the effect of improving the reaction stability of waste gas in the furnace and air.

Description

Technical Field

[0001] This application relates to the technical field of in-furnace waste gas melting treatment, and particularly relates to a method for pre-treating in-furnace waste gas with gas reuse and a melting device. Background Technique

[0002] The melting process mainly involves putting a certain proportion of raw materials into a melting furnace, heating the raw materials to a molten state, allowing the molten material to stay in the melting furnace for a sufficient time and then discharging it. During melting, air needs to be continuously introduced into the melting furnace to discharge the waste gas generated during the melting heating process.

[0003] In related technologies, a large amount of waste gas is generated during the process of heating raw materials to a molten state, and the waste gas contains various unstable gases. When the waste gas reacts with the introduced air, it is difficult to control the stability of the reaction, resulting in the presence of waste gas that is difficult to treat in the discharged gas.

[0004] In view of the above-mentioned related technologies, when the reaction stability between the waste gas and air is poor and there is too much residual waste gas, further waste gas treatment steps need to be added, increasing the waste gas treatment process and treatment time. Summary of the Invention

[0005] In order to improve the stability of the reaction between waste gas and air in the furnace and reduce the residual amount of waste gas in the discharged gas, this application provides a method for pre-treating in-furnace waste gas with gas reuse and a melting device.

[0006] In a first aspect, this application provides a method for pre-treating in-furnace waste gas with gas reuse, adopting the following technical solution: A method for pre-treating in-furnace waste gas with gas reuse includes: Collecting the raw material filling completion instruction issued by a preset first melting furnace, and matching the corresponding oxygen flow rate in the preset oxygen consumption database according to the raw material filling amount; Injecting oxygen into the first melting furnace based on the oxygen flow rate and uniformly heating the raw materials. When the raw materials in the furnace are in a molten state, detecting the concentration of waste gas in the first melting furnace; When the waste gas concentration in the furnace is equal to or greater than the reference treatment concentration, uniformly transferring the waste gas and the molten material in the first melting furnace to a preset second melting furnace, and detecting the gas in the second melting furnace to determine the intermediate waste gas; Matching the corresponding neutralizing oxygen flow rate in the preset gas neutralization database based on the intermediate waste gas, and injecting oxygen into the preset second melting furnace according to the neutralizing oxygen flow rate; Instructing a preset third melting furnace to receive the molten material and the intermediate waste gas in the preset second melting furnace, and detecting the residual amount of the intermediate waste gas. When the residual amount of the intermediate waste gas is within the preset standard residual range, discharging the molten material and the residual gas.

[0007] Optionally, when introducing oxygen into the first furnace and uniformly heating the raw materials, it includes: Collect the heating temperature and air pressure intensity inside the first furnace for analysis to determine the air pressure intensity increase rate and temperature increase rate; When the air pressure intensity increase rate is greater than the preset uniform exhaust pressure rate, match the corresponding temperature adjustment value in the preset feedback adjustment database according to the temperature increase rate; Based on the temperature adjustment value, perform feedback adjustment on the heating temperature of the first furnace, and collect the gas flow velocity output from the first furnace to the second furnace; When the gas flow velocity is greater than the preset effective reaction gas flow velocity, generate an oxygen introduction adjustment instruction to perform feedback adjustment on the introduced oxygen flow rate.

[0008] Optionally, when introducing oxygen into the preset second furnace according to the neutralizing oxygen flow rate, it further includes: Instruct the preset gas introduction pipeline to uniformly introduce oxygen along the inner wall of the circumference of the preset second furnace, and detect the gas flow velocity inside the preset second furnace; Based on the calculation of the preset good reaction gas flow velocity and the gas flow velocity, determine the gas flow velocity adjustment difference; Adjust the gas flow velocity inside the preset second furnace according to the gas flow velocity adjustment difference, and detect and analyze the gas components inside the furnace. When the gas components inside the furnace are the same as the preset gas composition components, perform oxygen flow rate adjustment according to the preset oxygen adjustment strategy.

[0009] Optionally, the oxygen adjustment strategy includes: Instruct the preset second furnace to increase the heating temperature according to the preset unit heating temperature value, and analyze the gas components inside the furnace to determine the oxygen consumption and waste gas increase amount; Based on the analysis of the second furnace temperature and waste gas increase amount of the preset second furnace, determine the optimal heating temperature with the optimal waste gas increase rate; Instruct the preset second furnace to maintain the optimal heating temperature, and calculate according to the oxygen consumption and the neutralizing oxygen flow rate to determine the oxygen remaining amount inside the second furnace; When the oxygen remaining amount inside the second furnace is less than the preset minimum oxygen remaining amount, supplement oxygen to the preset second furnace.

[0010] Optionally, when instructing the preset third furnace to receive the melt and intermediate waste gas inside the preset second furnace, it includes: Perform gas detection on the second furnace to determine the waste gas concentration inside the second furnace; When the waste gas concentration inside the second furnace is at the preset secondary reference treatment concentration, instruct the preset third furnace to perform preheating treatment; Detect the temperature inside the preset third furnace to determine the temperature inside the third furnace. When the temperature inside the third furnace is within the preset optimal reaction temperature range for waste gas, send a receiving instruction. After controlling the preset third furnace to receive the molten material based on the receiving instruction, output the waste gas in the preset second furnace to the preset third furnace.

[0011] Optionally, when the waste gas in the second furnace is output to the preset third furnace, it further includes: Analyze the gas composition inside the preset second furnace to determine the remaining amount of waste gas in the second furnace and match the corresponding adjustment pressure in the preset gas cleaning database. Instruct the preset second furnace to close the preset connecting valve and adjust the air pressure intensity inside the furnace according to the adjustment pressure. When the air pressure intensity inside the furnace is equal to the preset adjustment pressure, open the preset connecting valve and monitor the remaining amount of waste gas in the second furnace of the second furnace. Based on the comparative analysis of the remaining amount of waste gas in the second furnace and the preset standard cleaning remaining amount, when the remaining amount of waste gas in the second furnace is equal to the standard cleaning remaining amount, send a cleaning end prompt.

[0012] In a second aspect, the present application provides a melting device, adopting the following technical solution: A melting device applying the above gas reuse type in-furnace waste gas pretreatment method, including: A first furnace, provided with a feeding pipe for raw materials to be input, and provided with a first diversion pipe and a first ventilation pipe. The first diversion pipe is for discharging the molten material, and the first ventilation pipe receives oxygen and integrates it into the first furnace to react with the waste gas. A second furnace, arranged adjacent to the first furnace. The second furnace is connected to the first diversion pipe and is used to receive the molten material. The second furnace is provided with a second ventilation pipe and a second diversion pipe. The second container pipe allows oxygen to enter the second furnace to react with the waste gas, and the second diversion pipe discharges the molten material.

[0013] Optionally, it further includes a third furnace, which is connected to the second diversion pipe to receive the molten material and perform re-melting treatment. The third furnace is also provided with a third ventilation pipe for introducing oxygen into the third furnace to react with the waste gas.

[0014] In summary, the present application includes at least one of the following beneficial technical effects: 1. Uniformly and stably transmit the waste gas generated during the raw material melting treatment of the first furnace, and then disturb the air flow of the waste gas transmitted into the second furnace, so as to increase the reaction rate of the waste gas and oxygen, thereby greatly reducing the waste gas content transmitted into the third furnace, which helps the third furnace to absorb and treat the waste gas to meet the emission standards. 2. By analyzing the oxygen consumption rate and adjusting the melting temperature of the second furnace, the waste gas generated by the molten material in the second furnace can be quickly processed, and the corresponding oxygen input amount can be adjusted to maintain the stable reaction of the waste gas. 3. After the first furnace melts the raw materials, the generated molten material and waste gas can react with oxygen preliminarily and then be introduced into the second furnace for secondary in-depth waste gas treatment, so as to increase the contact reaction time between oxygen and waste gas, and make the waste gas fully treated and then enter the third furnace for residual tail gas treatment, so that the discharged gas is not likely to pollute the air. Brief Description of the Drawings

[0015] Figure 1 It is a flowchart of the method in steps S100 to S104 of the present application.

[0016] Figure 2 It is a flowchart of the method in steps S200 to S203 of the present application.

[0017] Figure 3 It is a flowchart of the method in steps S300 to S302 of the present application.

[0018] Figure 4 It is a flowchart of the method in steps S400 to S403 of the present application.

[0019] Figure 5 It is a flowchart of the method in steps S500 to S503 of the present application.

[0020] Figure 6 It is a flowchart of the method in steps S600 to S603 of the present application.

[0021] Figure 7 It is a schematic diagram of the overall structure of the melting device in the present application.

[0022] Description of the reference numerals: 1, the first furnace; 11, the first diversion pipe; 12, the first ventilation pipe; 2, the second furnace; 21, the second ventilation pipe; 22, the second diversion pipe; 3, the third furnace; 31, the third ventilation pipe. Detailed Embodiments

[0023] In order to make the purpose, technical solutions and advantages of the present application clearer, the following will further describe the present application in detail with reference to the attached Figure 1-7 drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0024] The following further describes the embodiments of the present invention in detail with reference to the drawings of the specification.

[0025] An embodiment of the present application discloses a method for pre-treating waste gas in a furnace with gas reuse. By stabilizing the transmission control of the waste gas generated in the first furnace, the waste gas is stably transported to the second furnace for secondary combustion treatment, and the oxygen input flow rate is adaptively adjusted according to the generation amount of the waste gas, so as to increase the reaction rate of the waste gas and oxygen, so that less residual waste gas can be fully treated in the third furnace and is not likely to pollute the air.

[0026] Referring to Figure 1 , the method flow of a method for pre-treating waste gas in a furnace with gas reuse includes the following steps: Step S100: Collect the raw material filling completion instruction sent by the preset first furnace, and match the corresponding oxygen flow rate in the preset oxygen consumption database according to the raw material filling amount; A raw material filling sensor is set in the first furnace, and when it detects that the raw material filling amount reaches the set weight, it sends a filling completion prompt instruction. The oxygen consumption database is a pre-established oxygen flow rate matching database, which stores different raw material filling amounts and the corresponding oxygen flow rates. When the raw material filling amount is input, it automatically matches and outputs the oxygen flow rate for subsequent calling.

[0027] Step S101: Introduce oxygen into the first furnace based on the oxygen flow rate and uniformly heat the raw materials. When the raw materials in the furnace are in a molten state, detect the concentration of waste gas in the first furnace; An oxygen flow rate control pump is set outside the first furnace. The oxygen flow rate control pump is connected between the first furnace and the oxygen cylinder, and is used to receive the oxygen flow rate signal and introduce oxygen into the first furnace, so that the raw materials undergoing melting treatment can meet the oxygen demand.

[0028] By detecting the temperature of the raw materials, when the temperature of the raw materials is in the molten state, the gas concentration is detected by the waste gas sensor, and it can be known whether waste gas is generated during the melting treatment of the raw materials at this time.

[0029] Step S102: When the waste gas concentration in the furnace is equal to or greater than the reference treatment concentration, uniformly transfer the waste gas and the melt in the first furnace to the preset second furnace, and detect the gas in the second furnace to determine the intermediate waste gas; The reference treatment concentration is the waste gas concentration value generated when the raw materials in the first furnace are in a molten state and react with oxygen during continuous reaction. When the waste gas concentration in the furnace is equal to or greater than the reference treatment concentration, it means that the waste gas is uniformly and continuously generated at a certain rate. At this time, the waste gas and the melt in the first furnace are transferred to the second furnace, so that the second furnace continues to heat the molten material and detects the flow rate of the waste gas in the second furnace, and the flow rate value can be known as the intermediate waste gas.

[0030] Step S103: Based on the intermediate waste gas, match the corresponding neutralizing oxygen flow rate in the preset gas neutralization database, and introduce oxygen into the preset second melting furnace according to the neutralizing oxygen flow rate; By matching the intermediate waste gas with the preset neutralization database, the oxygen flow rate required to remove the waste gas can be obtained, and the adjustment is made according to the required oxygen flow rate, so that the oxygen introduced into the second melting furnace can effectively reduce the waste gas surplus generated during the melting reaction process. Among them, the gas neutralization database is established in advance by the staff and stores different oxygen flow rates and the corresponding intermediate waste gas values for the oxygen flow rates.

[0031] Step S104: Instruct the preset third melting furnace to receive the melt and intermediate waste gas in the preset second melting furnace, and detect the residual amount of the intermediate waste gas. When the residual amount of the intermediate waste gas is within the preset standard residual range, discharge the molten material and the residual gas.

[0032] The third melting furnace receives the melt and intermediate waste gas remaining after the reaction in the second melting furnace, and conducts a detection of the waste gas production surplus, so that the waste gas in the second melting furnace is discharged only when it reaches the emission standard, without causing pollution to the air.

[0033] Refer to Figure 2 , when introducing oxygen into the first melting furnace and uniformly heating the raw materials, it includes: Step S200: Collect and analyze the heating temperature and air pressure intensity in the first melting furnace to determine the air pressure intensity increase rate and the temperature increase rate; A temperature sensor and an air pressure intensity detector are set in the first melting furnace to collect the heating temperature and air pressure intensity in the first furnace, and calculate the change of the heating temperature within a unit time, so that the temperature increase rate can be obtained. By calculating the change value of the air pressure intensity within the set unit time, the air pressure intensity increase rate can be obtained. The purpose of calculating the air pressure intensity increase rate and the temperature increase rate is to be called when analyzing the raw material reaction situation in the first furnace.

[0034] Step S201: When the air pressure intensity increase rate is greater than the preset uniform exhaust air pressure rate, match the corresponding temperature adjustment value in the preset feedback adjustment database according to the temperature increase rate; The uniform exhaust air intensity rate represents the rate when the waste gas is exhausted at a set uniform speed. When the waste gas in the first furnace is uniformly exhausted to the second melting furnace, controlling the waste gas to be in a uniform exhaust state helps the waste gas and oxygen to be in a stable state during the reaction, so that the control of the oxygen flow rate is not likely to change too much, and the reaction treatment effect of the waste gas is further improved.

[0035] The feedback adjustment database is a temperature adjustment database pre-established by the staff, which stores different temperature adjustment values and the corresponding temperature increase rates. When the temperature increase rate is input, the corresponding temperature adjustment value can be searched and output on the screen for subsequent use in temperature adjustment.

[0036] Among them, when the increase rate of air pressure intensity is too high, the exhaust gas will tend to be unstable when discharged. Therefore, it is necessary to adjust the temperature accordingly so that the temperature at which the molten material generates exhaust gas and the exhaust gas and oxygen undergo a neutralization reaction is not too high.

[0037] Step S202: Perform feedback adjustment on the heating temperature of the first furnace based on the temperature adjustment value, and collect the gas flow rate output from the first furnace to the second furnace; Perform temperature feedback adjustment on the first furnace according to the matched temperature adjustment value, so that the first furnace maintains a good reaction temperature and air pressure intensity. At the same time, continuously collect the gas flow rate output from the first furnace to the second furnace through a flow rate sensor.

[0038] Step S203: When the gas flow rate is greater than the preset effective reaction gas flow rate, generate an oxygen inlet adjustment instruction to perform feedback adjustment on the oxygen inlet flow rate.

[0039] The effective reaction gas flow rate represents the flow rate demarcation value during the exhaust gas transmission process. The gas flow rate below this demarcation value can enable the exhaust gas and oxygen to undergo an effective neutralization reaction. When exceeding this demarcation value, it is easy to cause insufficient reaction rate and excessive oxygen inlet, resulting in an increase in residual exhaust gas. Therefore, by further performing feedback adjustment on the oxygen flow rate, on the premise of temperature control, further adjust the oxygen flow rate so that too much exhaust gas is not easily generated in the second furnace.

[0040] Refer to Figure 3 , when introducing oxygen into the preset second furnace according to the neutralization oxygen flow rate, it further includes: Step S300: Instruct the preset gas inlet pipe to uniformly introduce oxygen along the inner wall of the circumference of the preset second furnace, and detect the gas flow rate in the preset second furnace; When introducing the oxygen required for the neutralization reaction into the second furnace according to the oxygen flow rate, since the distribution of exhaust gas in the furnace is relatively irregular, uniformly introducing oxygen along the inner wall of the circumference is beneficial to improving the mixing effect of the exhaust gas and oxygen and increasing the reaction rate.

[0041] Step S301: Calculate based on the preset good reaction gas flow rate and the gas flow rate to determine the gas flow rate adjustment difference; The good reaction gas flow rate represents the gas flow rate when the waste gas and oxygen are well mixed, which is obtained and recorded by the staff. The gas flow rate adjustment difference is calculated by taking the difference between the good reaction gas flow rate and the gas flow rate.

[0042] Step S302: Adjust the gas flow rate in the preset second furnace according to the gas flow rate adjustment difference, and detect and analyze the gas components in the furnace. When the gas components in the furnace are the same as the preset gas composition, adjust the oxygen flow rate according to the preset oxygen adjustment strategy.

[0043] Adjust the gas flow rate in the second furnace according to the gas flow rate adjustment difference, so that the introduced oxygen and the waste gas in the furnace are better mixed and react. At the same time, analyze the gas components in the furnace. When it is detected that the waste gas corresponds to the moving gas component, adjust the oxygen flow rate according to the set oxygen adjustment strategy to further accelerate the reaction rate. Among them, when oxygen is introduced into the furnace, the raw materials and oxygen react during the temperature increase process and generate waste gas, thereby increasing the furnace pressure and increasing the gas flow rate. Therefore, at this time, adjusting the oxygen flow rate through the oxygen adjustment strategy can further improve the neutralization treatment efficiency of the waste gas. The specific oxygen adjustment strategy will be further described in the subsequent steps.

[0044] Refer to Figure 4 , the oxygen adjustment strategy includes: Step S400: Instruct the preset second furnace to increase the heating temperature according to the preset unit heating temperature value, and analyze the gas components in the furnace to determine the oxygen consumption and the increase in waste gas; The unit heating temperature value is the heating temperature gradient value preset by the staff. When increasing the heating temperature in the second furnace according to the unit heating temperature value, it is not easy to cause too rapid temperature change and affect the waste gas generation amount, thus helping to maintain the stability of the neutralization reaction.

[0045] Step S401: Analyze based on the temperature in the second furnace of the preset second furnace and the increase in waste gas to determine the optimal heating temperature with the optimal waste gas increase rate; By continuously adjusting the temperature in the second furnace, it can be known that on the premise that the oxygen flow rate is kept feedback-adjusted with the temperature change, by monitoring and calculating the waste gas flow rate, it can be known that the heating temperature value with the highest increase in waste gas during the monitoring process is defined as the optimal heating temperature for subsequent calling.

[0046] Step S402: Instruct the preset second furnace to maintain the optimal heating temperature, and calculate based on the oxygen consumption and the neutralization oxygen flow rate to determine the oxygen surplus in the second furnace; When the second furnace is heated at the optimal heating temperature, further detect the oxygen surplus in the furnace to facilitate subsequent supplementary adjustment of the introduced oxygen.

[0047] Step S403: When the oxygen remaining in the second furnace is less than the preset minimum oxygen remaining, oxygen is supplied to the preset second melting furnace.

[0048] By timely supplying oxygen to the second furnace, it is ensured that the waste gas in the furnace is not easily caused to react out of balance due to lack of oxygen during the neutralization reaction.

[0049] Refer to Figure 5 , when instructing the preset third melting furnace to receive the melt and intermediate waste gas in the preset second melting furnace, it includes: Step S500: Perform gas detection on the second melting furnace to determine the concentration of waste gas in the second furnace; Detecting the concentration of waste gas in the second melting furnace is for subsequent further analysis when calling the intermediate waste gas.

[0050] Step S501: When the concentration of waste gas in the second furnace is at the preset secondary reference treatment concentration, instruct the preset third melting furnace to perform preheating treatment; The secondary reference treatment concentration represents the concentration when the concentration of waste gas in the second melting furnace is close to meeting the emission standard. At this time, preheating treatment is performed on the third melting furnace, so that the temperature in the third melting furnace is increased to the required temperature for the neutralization reaction of waste gas and oxygen, and at the same time, the waste gas is discharged to the third melting furnace for secondary neutralization treatment, which can effectively control the waste gas in the third melting furnace to be eliminated to the required standard harmless gas.

[0051] Step S502: Detect the temperature inside the preset third melting furnace to determine the temperature inside the third furnace. When the temperature inside the third furnace is within the preset optimal reaction temperature range of the waste gas, send a receiving instruction; The temperature inside the third melting furnace is detected by a temperature sensor to obtain the temperature inside the third furnace, and the temperature inside the third furnace is compared and analyzed with the preset optimal reaction range of the waste gas. When the temperature inside the third furnace is within the optimal reaction temperature range of the waste gas, it indicates that the residual waste gas can be better neutralized at this time, and a receiving instruction signal is sent at this time.

[0052] Step S503: Based on the receiving instruction, after controlling the preset third melting furnace to receive the melt, output the waste gas in the preset second melting furnace to the preset third melting furnace.

[0053] Based on the receiving instruction signal, control the third melting furnace to receive the melt of the second melting furnace, and at the same time output the waste gas in the second melting furnace to the third melting furnace to remove the residual waste gas.

[0054] Refer to Figure 6 , when the waste gas in the second melting furnace is output to the preset third melting furnace, it further includes: Step S600: Analyze the gas composition inside the preset second furnace to determine the remaining waste gas in the second furnace and match the corresponding adjustment pressure in the preset gas cleaning database; When the waste gas of the second furnace is output to the third furnace, by analyzing the gas composition through the gas sensor in the second furnace, the remaining gas volume of the waste gas composition in the second furnace can be known. Thus, by increasing the pressure in the second furnace, the waste gas can be transported to the third furnace for treatment to the greatest extent as the pressure increases. Among them, the gas cleaning database is pre-established by the staff and stores different adjustment pressures and the remaining waste gas in the second furnace corresponding to the adjustment pressures. When the remaining waste gas in the second furnace is input, the adjustment pressure is automatically matched and output. For example, when the remaining waste gas in the second furnace is 3 cubic meters, the corresponding adjustment pressure is 15 MPa.

[0055] Step S601: Instruct the preset second furnace to close the preset connection valve and adjust the gas pressure intensity in the furnace according to the adjustment pressure; After the second furnace closes the connection valve, the second furnace is kept airtight. Thus, when adjusting the gas pressure intensity in the furnace according to the adjustment pressure, the adjustment can be quickly completed to facilitate subsequent control of the waste gas discharge.

[0056] Step S602: When the gas pressure intensity in the furnace is equal to the preset adjustment pressure, open the preset connection valve and monitor the remaining waste gas in the second furnace of the second furnace; When the gas pressure intensity in the furnace is equal to the preset adjustment pressure, it means that the gas pressure intensity of the second furnace has reached the required standard at this time, and the waste gas in the second furnace can be effectively discharged towards the third furnace. Then open the connection valve so that the waste gas can be output towards the third furnace with a lower pressure, and at the same time monitor the remaining waste gas in the second furnace to facilitate knowing whether the waste gas discharge has been completed.

[0057] Step S603: Based on the comparative analysis of the remaining waste gas in the second furnace and the preset standard cleaning margin, when the remaining waste gas in the second furnace is equal to the standard cleaning margin, send a cleaning end prompt.

[0058] When the remaining waste gas in the second furnace reaches the preset standard cleaning margin, it means that the waste gas has been completely transported into the third furnace. Then a cleaning end prompt signal is sent at this time to facilitate stopping the redundant control of the second furnace.

[0059] Refer to Figure 7 , based on the same inventive concept, an embodiment of the present invention provides a melting device, including: a first furnace 1, a second furnace 2 and a third furnace 3. Among them, the first furnace 1 is provided with a feeding pipe for raw materials to be put in, and is provided with a first diversion pipe 11 and a first ventilation pipe 12. The first diversion pipe is for the molten material to be discharged, and the first ventilation pipe receives oxygen to be incorporated into the first furnace 1 to react with the waste gas.

[0060] The second furnace 2 is arranged adjacent to the first furnace 1. The second furnace 2 is connected to the first draft tube 11 and is used to receive molten material. The second furnace 2 is provided with a second ventilation tube 21 and a second draft tube 22. Oxygen is introduced into the second furnace 2 through the second ventilation tube 21 to react with the waste gas, and the molten material is discharged through the second draft tube 22.

[0061] The third furnace 3 is connected to the second draft tube 22 to receive the molten material and perform re-melting treatment. The third furnace 3 is also provided with a third ventilation tube 31 for introducing oxygen into the third furnace 3 to react with the waste gas.

[0062] The implementation principle of a melting device is as follows: When the feedstock enters the first furnace 1 for melting treatment, by controlling the oxygen flow rate introduced into the first furnace 1 and performing corresponding waste gas concentration detection, and sequentially transferring the generated melt to the second furnace 2 and the third furnace 3. At the same time, by detecting the residual amount of waste gas in the second furnace 2 and the third furnace 3, the oxygen introduced into the second furnace 2 and the third furnace 3 can be dynamically adjusted, so that the finally discharged residual gas meets the standard requirements and is not likely to pollute the air.

[0063] Those skilled in the art can clearly understand that, for the convenience and simplicity of description, only the above-mentioned division of each functional module is used as an example. In practical applications, the above functions can be allocated to different functional modules as needed, that is, the internal structure of the device is divided into different functional modules to complete all or part of the functions described above. The specific working processes of the systems, devices, and units described above can refer to the corresponding processes in the foregoing method embodiments and will not be elaborated here.

[0064] An embodiment of the present invention provides a computer-readable storage medium storing a computer program that can be loaded and executed by a processor for the waste gas pretreatment method in the furnace with gas reuse.

[0065] Computer storage media include, for example: various media such as USB flash drives, mobile hard disks, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical discs that can store program codes.

[0066] Based on the same inventive concept, an embodiment of the present invention provides an intelligent terminal, including a memory and a processor. A computer program that can be loaded and executed by the processor for the waste gas pretreatment method in the furnace with gas reuse is stored on the memory.

[0067] Those skilled in the art can clearly understand that for the convenience and conciseness of description, only the division of the above-mentioned functional modules is used as an example. In actual applications, the above-mentioned functions can be allocated to different functional modules as needed, that is, the internal structure of the device can be divided into different functional modules to complete all or part of the functions described above. For the specific working processes of the system, device, and unit described above, reference can be made to the corresponding processes in the foregoing method embodiments, which will not be elaborated herein.

[0068] The above are all preferred embodiments of the present application. The protection scope of the present application is not limited by this. Any feature disclosed in this specification (including the abstract and drawings), unless specifically described, can be replaced by other equivalent or similar-purpose alternative features. That is, unless specifically described, each feature is only an example of a series of equivalent or similar features.

Claims

1. A method for pre-treating waste gas in a furnace with gas reuse, characterized in that, Including: Collect the raw material filling completion instruction issued by the preset first furnace, and match the corresponding oxygen flow rate in the preset oxygen consumption database according to the raw material filling amount; Inject oxygen into the first furnace based on the oxygen flow rate and uniformly heat the raw materials. When the raw materials in the furnace are in a molten state, detect the concentration of waste gas in the first furnace; When the concentration of waste gas in the furnace is equal to or greater than the reference treatment concentration, transfer the waste gas and the melt in the first furnace to the preset second furnace at a constant speed, and detect the gas in the second furnace to determine the intermediate waste gas; Match the corresponding neutralizing oxygen flow rate in the preset gas neutralization database based on the intermediate waste gas, and inject oxygen into the preset second furnace according to the neutralizing oxygen flow rate; Instruct the preset third furnace to receive the melt and the intermediate waste gas in the preset second furnace, and detect the residual amount of the intermediate waste gas. When the residual amount of the intermediate waste gas is within the preset standard residual range, discharge the molten material and the residual gas; 2. The gas reuse type in-furnace waste gas pretreatment method according to claim 1, characterized in that, When injecting oxygen into the first furnace and uniformly heating the raw materials, it includes: Collect and analyze the heating temperature and air pressure intensity in the first furnace to determine the air pressure intensity increase rate and the temperature increase rate; When the air pressure intensity increase rate is greater than the preset constant speed exhaust pressure rate, match the corresponding temperature adjustment value in the preset feedback adjustment database according to the temperature increase rate; Perform feedback adjustment on the heating temperature of the first furnace based on the temperature adjustment value, and collect the gas flow rate output from the first furnace to the second furnace; When the gas flow rate is greater than the preset effective reaction gas flow rate, generate an oxygen injection adjustment instruction to perform feedback adjustment on the injected oxygen flow rate; 3. The gas reuse type in-furnace waste gas pretreatment method according to claim 1, characterized in that, When injecting oxygen into the preset second furnace according to the neutralizing oxygen flow rate, it further includes: Instruct the preset gas injection pipeline to uniformly inject oxygen along the inner wall of the circumference of the preset second furnace, and detect the gas flow rate in the preset second furnace; Calculate based on the preset good reaction gas flow rate and the gas flow rate to determine the gas flow rate adjustment difference; Adjust the gas flow rate in the preset second furnace according to the gas flow rate adjustment difference, and detect and analyze the gas components in the furnace. When the gas components in the furnace are the same as the preset gas composition components, perform oxygen flow rate adjustment with the preset oxygen adjustment strategy; 4. The gas reuse type in-furnace waste gas pretreatment method according to claim 3, wherein, The oxygen adjustment strategy includes: Instruct the preset second furnace to increase the heating temperature according to the preset unit heating temperature value, and analyze the gas components in the furnace to determine the oxygen consumption and the waste gas increase amount; Analyze based on the second furnace temperature and the waste gas increase amount of the preset second furnace to determine the optimal heating temperature with the best waste gas increase rate; Instruct the preset second furnace to maintain the optimal heating temperature, and calculate based on the oxygen consumption and the neutralizing oxygen flow rate to determine the oxygen surplus in the second furnace; When the oxygen surplus in the second furnace is less than the preset minimum oxygen surplus, supplement oxygen to the preset second furnace; 5. The gas reuse type in-furnace waste gas pretreatment method according to claim 1, wherein When instructing the preset third furnace to receive the melt and the intermediate waste gas in the preset second furnace, it includes: Perform gas detection on the second furnace to determine the waste gas concentration in the second furnace; When the waste gas concentration in the second furnace is at the preset secondary reference treatment concentration, instruct the preset third furnace to perform preheating treatment; Detect the temperature inside the preset third furnace to determine the temperature inside the third furnace. When the temperature inside the third furnace is within the preset optimal reaction temperature range of the waste gas, send a receiving instruction. Based on the receiving instruction, after controlling the preset third furnace to receive the molten material, output the waste gas in the preset second furnace to the preset third furnace.

6. The method for pre-treating waste gas in a furnace with gas reuse according to claim 5, characterized in that, When the waste gas in the second furnace is output to the preset third furnace, it also includes: Analyze the gas composition inside the preset second furnace to determine the remaining amount of waste gas in the second furnace and match the corresponding adjusted pressure in the preset gas cleaning database. Instruct the preset second furnace to close the preset connecting valve and adjust the air pressure intensity inside the furnace according to the adjusted pressure. When the air pressure intensity inside the furnace is equal to the preset adjusted pressure, open the preset connecting valve and monitor the remaining amount of waste gas in the second furnace of the second furnace. Based on the comparative analysis of the remaining amount of waste gas in the second furnace and the preset standard cleaning remaining amount, when the remaining amount of waste gas in the second furnace is equal to the standard cleaning remaining amount, send a cleaning end prompt.

7. A melting device that applies the gas reuse type in-furnace waste gas pretreatment method according to any one of claims 1-6, characterized in that, It includes: The first furnace (1) is provided with a feeding pipe for raw materials to be put in, and is provided with a first diversion pipe (11) and a first ventilation pipe (12). The first diversion pipe (11) is for discharging the molten material, and the first ventilation pipe (12) receives oxygen to be incorporated into the first furnace (1) to react with the waste gas. The second furnace (2) is arranged adjacent to the first furnace (1). The second furnace (2) is connected to the first diversion pipe (11) and is used to receive the molten material. The second furnace (2) is provided with a second ventilation pipe (21) and a second diversion pipe (22). The second container pipe allows oxygen to enter the second furnace (2) to react with the waste gas, and the second diversion pipe (22) discharges the molten material.

8. A melting device according to claim 7, characterized in that, It further includes a third furnace (3). The third furnace (3) is connected to the second diversion pipe to receive the molten material and perform re-melting treatment. The third furnace (3) is also provided with a third ventilation pipe (31) for introducing oxygen into the third furnace (3) to react with the waste gas.

Images