Denitration method and system based on biomass particle combustion

Abstract

The invention relates to the technical field of biomass particle heavy metal detection, in particular to a denitration method and system based on biomass particle combustion, and the denitration method comprises the following steps: performing combustion operation on unburned biomass particles to obtain biomass ash, screening the biomass ash to obtain biomass coarse ash and biomass fine ash, performing heavy metal detection on the biomass coarse ash, and screening the biomass fine ash to obtain the biomass fine ash and the biomass coarse ash. Carrying out heavy metal detection on the biomass fine ash to obtain a fine ash heavy metal value, if the heavy metal value of the coarse slag or the heavy metal value of the fine ash is determined to be greater than a preset standard threshold value, carrying out heavy metal separation to obtain separated biomass and heavy metal, and carrying out acid pickling on the heavy metal to obtain a neutralized solution; and detecting the gas safety index of the combustion gas, and based on the comprehensive combustion characteristic index value, separating the biomass, safely combusting the gas and neutralizing the solution to complete denitration based on biomass particle combustion. According to the invention, heavy metals can be effectively separated and recovered from biomass ash.

Description

Technical Field

[0001] The present invention relates to the technical field of heavy metal detection of biomass particles, and in particular to a denitration method, system, electronic equipment and computer-readable storage medium based on the combustion of biomass particles. Background Art

[0002] Biomass pellets are a specially treated solid biofuel, mainly made from various biomass raw materials, including but not limited to crop straw, forestry waste, garden waste, animal manure and other organic matter. Denitrification is a technical method to reduce nitrogen oxide emissions during the combustion process.

[0003] Traditional biomass pellet combustion technology can improve combustion efficiency, but it is often accompanied by higher nitrogen oxide emissions. In addition, the ash produced by biomass combustion may contain harmful substances such as heavy metals. If not handled properly, it may cause soil and water pollution. Therefore, how to effectively separate and recover heavy metals from biomass ash is a technical problem that needs to be solved urgently. Summary of the invention

[0004] The present invention provides a denitration method based on biomass particle combustion and a computer-readable storage medium, the main purpose of which is to effectively separate and recover heavy metals from biomass ash and reduce environmental pollution.

[0005] To achieve the above object, the present invention provides a denitrification method based on biomass particle combustion, comprising: Obtaining a biomass raw material and a vacuum combustion chamber, obtaining biomass particles according to the biomass raw material, and introducing the biomass particles into the vacuum combustion chamber to obtain unburned biomass particles; Receiving a biomass particle burning instruction, performing a combustion operation on unburned biomass particles according to the biomass particle burning instruction, and delivering pre-constructed oxygen to the vacuum combustion chamber using a preset gas ratio to obtain biomass ash and combustion gas; Obtaining a comprehensive combustion characteristic index value of biomass pellets based on biomass ash and unburned biomass pellets; Screening the biomass ash using a preset screening size to obtain biomass coarse ash and biomass fine ash, wherein the diameter of the biomass coarse ash is greater than the screening size, and the diameter of the biomass fine ash is less than or equal to the screening size; Perform heavy metal detection on biomass coarse ash to obtain the coarse slag heavy metal value, and perform heavy metal detection on biomass fine ash to obtain the fine ash heavy metal value; Determine whether there is a heavy metal value greater than a preset standard threshold value in the coarse slag heavy metal value and the fine ash heavy metal value; If it is confirmed that the heavy metal value of the coarse slag or the heavy metal value of the fine ash is greater than the preset standard threshold, heavy metal separation is performed on the biomass coarse ash slag corresponding to the coarse slag metal value or the biomass fine ash corresponding to the fine ash heavy metal value greater than the preset standard threshold to obtain separated biomass and heavy metals; Obtain the type of heavy metals according to the heavy metals, and perform acid washing on the heavy metals according to the type of heavy metals to obtain a neutralization solution; Detect the gas safety index of combustion gas; If the gas safety index is less than the preset first gas threshold, the combustion gas is confirmed as safe combustion gas; If the gas safety index is greater than or equal to a preset first gas threshold and less than a preset second gas threshold, denitration or desulfurization operation is performed on the combustion gas until the gas safety index is less than the preset first gas threshold to obtain safe combustion gas; If the gas safety index is greater than or equal to the second gas threshold, a denitration operation is performed on the combustion gas to obtain an initial combustion gas, and a desulfurization operation is performed on the initial combustion gas to obtain an optimized combustion gas, the optimized combustion gas is used as the combustion gas, and the process returns to the step of detecting the gas safety index of the combustion gas until the gas safety index is less than the preset first gas threshold to obtain a safe combustion gas; Denitrification based on biomass particle combustion is completed based on the comprehensive combustion characteristic index value, separated biomass, safe combustion gas and neutralization solution.

[0006] Optionally, obtaining the comprehensive combustion characteristic index value of the biomass particles according to the biomass ash and unburned biomass particles includes: Obtain the mass of unburned biomass particles and the mass of biomass ash; The ignition temperature of the unburned biomass particles and the temperature of the biomass ash are obtained by using a pre-built thermocouple, wherein the thermocouple includes: a hot junction and a cold junction; The comprehensive combustion characteristic index value of the biomass particles is calculated using the pre-constructed comprehensive combustion characteristic index formula, the mass of the unburned biomass particles, the mass of the biomass ash, the ignition temperature of the unburned biomass particles and the temperature of the biomass ash. The calculation formula is as follows: ; in, Indicates the comprehensive combustion characteristic index value, represents the maximum burning rate, represents the ignition temperature of unburned biomass particles, represents the temperature of biomass ash, represents the heating rate, represents the mass of unburned biomass particles, Indicates the mass of biomass ash, Indicates the mass change of unburned biomass particles during the combustion process. Indicates the time change corresponding to the mass change.

[0007] Optionally, the method of obtaining the ignition temperature of unburned biomass particles and the temperature of biomass ash by using a pre-built thermocouple comprises: Acquiring electromotive force data of unburned biomass particles using the hot junction and a preset temperature detection time, wherein the hot junction is located inside the unburned biomass particles, wherein the electromotive force data includes a plurality of electromotive force values; Acquiring outdoor temperature data using the cold junction, a pre-built temperature measuring instrument and a preset temperature detection time, wherein the outdoor temperature data includes a plurality of outdoor temperature values, and the outdoor temperature values ​​correspond to the electromotive force values ​​one by one; The electromotive force values ​​are extracted from the electromotive force data in sequence, and the following operations are performed on the extracted electromotive force values: The combustion temperature value is calculated using the pre-built temperature-electromotive force formula, the outdoor temperature value corresponding to the extracted electromotive force, and the electromotive force value; Summarize the combustion temperature values ​​to obtain combustion temperature data; The ignition temperature of the unburned biomass pellets and the temperature of the biomass ash are confirmed based on the combustion temperature data.

[0008] Optionally, the temperature-electromotive force formula includes: ; in, Indicates the combustion temperature value, Indicates the outdoor temperature value. represents the electromotive force value, Represents the Seebeck coefficient of the thermocouple.

[0009] Optionally, the performing heavy metal detection on the biomass coarse ash to obtain the coarse ash heavy metal value includes: Grinding the biomass coarse ash using a pre-built grinder and a preset coarse particle grinding time to obtain initial biomass powder; Extracting target biomass powder from the initial biomass powder according to a preset extraction weight, and digesting the target biomass powder using a pre-constructed digestion tank and pre-constructed concentrated nitric acid to obtain a pre-digestion solution; The pre-digestion solution is heated until the target biomass powder in the pre-digestion solution is completely dissolved to obtain a digestion solution; Using a pre-constructed constant volume solvent to adjust the volume of the digestion solution to obtain a constant volume solution; According to a preset solution detection ratio, extracting a sample ratio solution from the fixed volume solution, obtaining the absorbance of the standard solution, and obtaining a standard absorbance curve based on the absorbance of the standard solution, wherein the horizontal axis of the standard absorbance curve is the concentration and the vertical axis of the standard absorbance curve is the absorbance; Obtaining the sample absorbance of the sample ratio solution, and extracting the sample concentration corresponding to the sample absorbance from the standard absorbance curve; The sample heavy metal value is obtained according to the sample concentration and the pre-constructed heavy metal content formula, and the sample heavy metal value is confirmed as the coarse slag heavy metal value.

[0010] Optionally, the heavy metal content formula is as follows: ; in, Indicates the heavy metal value of the sample, represents the sample concentration, represents the volume of the fixed solution, represents the dilution factor, represents the volume of the sample ratio solution, and H represents the recovery factor.

[0011] Optionally, the step of acid washing the heavy metals according to the types of the heavy metals to obtain a neutralized solution comprises: A pickling solution is prepared according to the type of heavy metals, and the pickling solution is poured into a pre-constructed pickling tank to obtain a pre-pickling solution, deionized water is obtained according to a preset dilution volume, and a pickling agent is obtained according to the pre-pickling solution and the deionized water; According to a preset standard weight, standard heavy metals are extracted from heavy metals, the standard heavy metals are pickled with a pickling agent to obtain an initial pickling solution, and a pH value of the solution is obtained according to the initial pickling solution and a pre-built pH tester; Obtain a standard pH threshold, and obtain a pH difference value according to the pH value of the solution and the standard pH threshold; Determining whether the pH difference is within a preset pH difference range; If it is confirmed that the pH difference is not within the preset pH difference interval, determine whether the pH difference is positive or negative; if the pH difference is positive, acidify the initial pickling solution with a pre-constructed acidic substance to obtain a first pH value solution, obtain a first pH value of the first pH value solution, take the first pH value as the solution pH value, return to the step of obtaining the pH difference according to the solution pH value and the standard pH threshold value, until the pH difference is within the preset pH difference interval, and obtain a neutralized solution; If the pH difference is a negative value, the initial pickling solution is alkalized by a pre-constructed alkaline substance to obtain a second pH value solution, and the second pH value of the second pH value solution is obtained. The second pH value is used as the solution pH value, and the step of obtaining the pH difference according to the solution pH value and the standard pH threshold is returned until the pH difference is within the preset pH difference range to obtain a neutralized solution.

[0012] Optionally, the detecting of the gas safety index of the combustion gas includes: Obtaining a composite gas concentration based on the combustion gas and a pre-constructed integrated gas collection device, wherein the composite gas concentration includes one or more gas concentrations, and wherein the integrated gas collection device includes multiple gas collection devices; Obtain nitrogen oxide concentration and sulfur dioxide concentration according to the gas composite concentration, and obtain safe nitrogen oxide concentration threshold and safe sulfur dioxide concentration threshold; The gas safety index of the combustion gas is calculated using the pre-built gas safety index formula, nitrogen oxide concentration, sulfur dioxide concentration, safe nitrogen oxide concentration threshold, and safe sulfur dioxide concentration threshold.

[0013] Optionally, the gas safety index formula is as follows: ; in, Indicates the gas safety index, represents the weight coefficient of nitrogen oxides, is the concentration of nitrogen oxides, Indicates the safe nitrogen oxide concentration threshold, represents the weight coefficient of sulfur dioxide, represents the sulfur dioxide concentration, Indicates the safe sulfur dioxide concentration threshold.

[0014] To achieve the above object, the present invention also provides a denitrification system based on biomass particle combustion, comprising: A biomass particle combustion module is used to obtain a biomass raw material and a vacuum combustion chamber, obtain biomass particles according to the biomass raw material, and introduce the biomass particles into the vacuum combustion chamber to obtain unburned biomass particles, receive a biomass particle combustion instruction, perform a combustion operation on the unburned biomass particles according to the biomass particle combustion instruction, and use a preset gas ratio to transport pre-constructed oxygen to the vacuum combustion chamber to obtain biomass ash and combustion gas, and obtain a comprehensive combustion characteristic index value of the biomass particles according to the biomass ash and the unburned biomass particles; a biomass ash processing module, for screening the biomass ash using a preset screening size to obtain biomass coarse ash and biomass fine ash, wherein the diameter of the biomass coarse ash is greater than the screening size, and the diameter of the biomass fine ash is less than or equal to the screening size, performing heavy metal detection on the biomass coarse ash to obtain a coarse slag heavy metal value, performing heavy metal detection on the biomass fine ash to obtain a fine ash heavy metal value, judging whether there is a heavy metal value greater than a preset standard threshold value in the coarse slag heavy metal value and the fine ash heavy metal value, and if it is confirmed that the coarse slag heavy metal value or the fine ash heavy metal value is greater than the preset standard threshold value, then performing heavy metal separation on the biomass coarse ash corresponding to the coarse slag metal value greater than the preset standard threshold value or the biomass fine ash corresponding to the fine ash heavy metal value to obtain separated biomass and heavy metals, obtaining the type of heavy metal according to the heavy metal, and acid-washing the heavy metal according to the type of heavy metal to obtain a neutralization solution; a combustion gas detection module, for detecting a gas safety index of the combustion gas; if the gas safety index is less than a preset first gas threshold, the combustion gas is confirmed as a safe combustion gas; if the gas safety index is greater than or equal to the preset first gas threshold and less than a preset second gas threshold, a denitration or desulfurization operation is performed on the combustion gas until the gas safety index is less than the preset first gas threshold to obtain a safe combustion gas; if the gas safety index is greater than or equal to the second gas threshold, a denitration operation is performed on the combustion gas to obtain an initial combustion gas, and a desulfurization operation is performed on the initial combustion gas to obtain an optimized combustion gas, the optimized combustion gas is used as the combustion gas, and the step of detecting the gas safety index of the combustion gas is returned to until the gas safety index is less than the preset first gas threshold to obtain a safe combustion gas; The denitrification process completion module is used to complete the denitrification based on the combustion of biomass particles based on the comprehensive combustion characteristic index value, separated biomass, safe combustion gas and neutralization solution.

[0015] In order to solve the above problem, the present invention further provides an electronic device, the electronic device comprising: A memory storing at least one instruction; The processor executes the instructions stored in the memory to implement the above-mentioned denitrification method based on biomass particle combustion.

[0016] In order to solve the above problems, the present invention also provides a computer-readable storage medium, in which at least one instruction is stored. The at least one instruction is executed by a processor in an electronic device to implement the above-mentioned denitrification method based on biomass particle combustion.

[0017] The present invention is to solve the problems described in the background technology. The present invention obtains biomass raw materials and a vacuum combustion chamber, obtains biomass particles according to the biomass raw materials, and introduces the biomass particles into the vacuum combustion chamber to obtain unburned biomass particles. The present invention uses the vacuum combustion chamber to ensure that the combustion process is carried out in a controllable environment, avoids interference with combustion by external factors, improves combustion efficiency and safety, receives instructions for burning biomass particles, performs combustion operations on unburned biomass particles according to the instructions for burning biomass particles, and uses a preset gas ratio to transport pre-constructed oxygen to the vacuum combustion chamber to obtain biomass ash and combustion gas. The present invention accurately controls the supply of oxygen to avoid excessive combustion and nitrogen oxide generation caused by excessive oxygen, and at the same time improves combustion efficiency. The present invention obtains the comprehensive combustion characteristic index value of biomass particles from the biomass ash and unburned biomass particles. The present invention monitors the combustion efficiency and environmental protection through the comprehensive combustion characteristic index value, provides data support for optimizing the combustion conditions, and screens the biomass ash with a preset screening size to obtain biomass coarse ash and biomass fine ash, wherein the diameter of the biomass coarse ash is greater than the screening size, and the diameter of the biomass fine ash is less than or equal to the screening size. The present invention classifies the biomass ash to facilitate subsequent heavy metal detection and separation, improve resource utilization efficiency and reduce time, perform heavy metal detection on the biomass coarse ash to obtain the coarse ash heavy metal value, perform heavy metal detection on the biomass fine ash to obtain the fine ash heavy metal value, and the present invention detects the heavy metal content in the ash. Ensure that the pollution to the environment during the combustion process is controllable, determine whether there is a heavy metal value greater than a preset standard threshold in the coarse slag heavy metal value and the fine ash heavy metal value. The present invention controls heavy metal emissions by setting a standard threshold to avoid harm to the environment and human health. If it is confirmed that the coarse slag heavy metal value or the fine ash heavy metal value is greater than the preset standard threshold, then the biomass coarse ash slag corresponding to the coarse slag metal value greater than the preset standard threshold or the biomass fine ash corresponding to the fine ash heavy metal value is subjected to heavy metal separation to obtain separated biomass and heavy metals. The separated biomass and heavy metals in the present invention can be used separately to realize resource utilization. The type of heavy metal is obtained according to the heavy metal, and the heavy metal is acid-washed according to the type of heavy metal to obtain a neutralization solution. The present invention uses acid Wash away heavy metals to reduce pollution to the environment, detect the gas safety index of the combustion gas, the present invention evaluates the pollutant content of the combustion gas through the gas safety index to ensure that the combustion process meets environmental protection standards, if the gas safety index is less than the preset first gas threshold, the combustion gas is confirmed as safe combustion gas, if the gas safety index is greater than or equal to the preset first gas threshold and less than the preset second gas threshold, then perform denitrification or desulfurization operations on the combustion gas until the gas safety index is less than the preset first gas threshold to obtain safe combustion gas, the present invention selects a suitable pollutant treatment method such as denitrification or desulfurization according to the level of the gas safety index, ensures safe gas discharge, avoids unnecessary treatment of low-pollution gas, and improves efficiency,If the gas safety index is greater than or equal to the second gas threshold, a denitrification operation is performed on the combustion gas to obtain an initial combustion gas, and a desulfurization operation is performed on the initial combustion gas to obtain an optimized combustion gas. The optimized combustion gas is used as the combustion gas, and the step of detecting the gas safety index of the combustion gas is returned until the gas safety index is less than the preset first gas threshold to obtain a safe combustion gas. The present invention completely removes nitrogen oxides and sulfur dioxide from the combustion gas through a combined operation of denitrification and desulfurization to ensure that emissions meet standards. Denitrification based on biomass particle combustion is completed based on a comprehensive combustion characteristic index value, separated biomass, safe combustion gas, and a neutralization solution. The present invention ensures that the denitrification process is efficiently completed through full-process optimization and pollutant treatment. Therefore, the present invention can effectively separate and recover heavy metals from biomass ash and reduce environmental pollution. , BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A schematic flow chart of a denitrification method based on biomass particle combustion provided in one embodiment of the present invention; Figure 2 A functional module diagram of a denitration system based on biomass particle combustion provided by an embodiment of the present invention; Figure 3 A schematic diagram of the structure of an electronic device for implementing the denitration method based on biomass particle combustion provided in one embodiment of the present invention.

[0019] Description of reference numerals: 1. Electronic device; 10. Processor; 11. Memory; 12. Bus.

[0020] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0021] It should be understood that the specific embodiments described herein are only used to explain the present invention, and are not used to limit the present invention.

[0022] The embodiment of the present application provides a denitration method based on the combustion of biomass particles. The execution subject of the denitration method based on the combustion of biomass particles includes but is not limited to at least one of the electronic devices such as a server and a terminal that can be configured to execute the method provided in the embodiment of the present application. In other words, the denitration method based on the combustion of biomass particles can be executed by software or hardware installed in a terminal device or a server device, and the software can be a blockchain platform. The server includes but is not limited to: a single server, a server cluster, a cloud server or a cloud server cluster, etc.

[0023] Reference Figure 1FIG. 1 is a flow chart of a denitration method based on combustion of biomass particles provided by an embodiment of the present invention. In this embodiment, the denitration method based on combustion of biomass particles includes: S1. Obtain a biomass raw material and a vacuum combustion chamber, obtain biomass particles according to the biomass raw material, and introduce the biomass particles into the vacuum combustion chamber to obtain unburned biomass particles.

[0024] It should be explained that the steps of obtaining biomass raw materials and vacuum combustion chambers are: collecting agricultural and forestry wastes from farmland, woodland or farms, identifying agricultural and forestry wastes as biomass raw materials, and using vacuum equipment to construct the environment in the combustion chamber into a vacuum environment to obtain a vacuum combustion chamber. The steps of obtaining biomass particles based on biomass raw materials are: drying the collected biomass raw materials, crushing the dried raw materials, and using a pelletizer to compress the raw materials into regular particles through high temperature and high pressure to obtain biomass particles. Unburned biomass particles refer to biomass particles that have been prepared but have not yet been burned.

[0025] S2. Receive a biomass particle burning instruction, perform a combustion operation on the unburned biomass particles according to the biomass particle burning instruction, and use a preset gas ratio to deliver pre-constructed oxygen to the vacuum combustion chamber to obtain biomass ash and combustion gas.

[0026] It should be explained that the biomass particle burning instruction refers to an instruction for instructing the start of the combustion operation of the unburned biomass particles. The step of performing the combustion operation on the unburned biomass particles according to the biomass particle burning instruction is: while delivering pre-constructed oxygen to the vacuum combustion chamber, after igniting the unburned biomass particles by using an ignition device, the biomass particles are burned. The gas ratio refers to a preset ratio for the ratio of oxygen delivered to the vacuum combustion chamber during the combustion process. The combustion gas refers to the gas product generated during the combustion process.

[0027] S3. Obtaining a comprehensive combustion characteristic index value of the biomass particles according to the biomass ash and unburned biomass particles.

[0028] It should be explained that biomass ash refers to the solid matter remaining after complete or incomplete combustion of biomass particles.

[0029] In detail, the method of obtaining the comprehensive combustion characteristic index value of the biomass particles according to the biomass ash and the unburned biomass particles includes: Obtain the mass of unburned biomass particles and the mass of biomass ash; The ignition temperature of the unburned biomass particles and the temperature of the biomass ash are obtained by using a pre-built thermocouple, wherein the thermocouple includes: a hot junction and a cold junction; The comprehensive combustion characteristic index value of the biomass particles is calculated using the pre-constructed comprehensive combustion characteristic index formula, the mass of the unburned biomass particles, the mass of the biomass ash, the ignition temperature of the unburned biomass particles and the temperature of the biomass ash. The calculation formula is as follows: ; in, Indicates the comprehensive combustion characteristic index value, represents the maximum burning rate, represents the ignition temperature of unburned biomass particles, represents the temperature of biomass ash, represents the heating rate, represents the mass of unburned biomass particles, Indicates the mass of biomass ash, Indicates the mass change of unburned biomass particles during the combustion process. Indicates the time change corresponding to the mass change.

[0030] It should be explained that the steps of obtaining the mass of the unburned biomass particles and the mass of the biomass ash are: using a weighing device to weigh the unburned biomass particles and the biomass ash to obtain the mass of the unburned biomass particles and the mass of the biomass ash. A thermocouple is a temperature measurement sensor that measures temperature by utilizing the thermoelectric effect at the contact point of two different metal conductors.

[0031] It should be explained that the hot junction refers to the contact point of two different metal conductors of the thermocouple, which is located at the position of the measured temperature. The cold junction refers to the other contact point of the thermocouple, which is located at room temperature. The maximum combustion rate refers to the maximum value of the combustion rate of the biomass particles during the combustion process. The maximum combustion rate described in the embodiment of the present invention refers to the maximum combustion rate of the biomass particles detected during combustion in the historical time period. The ignition temperature indicates the temperature at which the unburned biomass particles begin to burn. The heating rate refers to the rate of change of temperature over time during the combustion process.

[0032] In detail, the method of obtaining the ignition temperature of unburned biomass particles and the temperature of biomass ash by using a pre-built thermocouple includes: Acquiring electromotive force data of unburned biomass particles using the hot junction and a preset temperature detection time, wherein the hot junction is located inside the unburned biomass particles, wherein the electromotive force data includes a plurality of electromotive force values; Acquiring outdoor temperature data using the cold junction, a pre-built temperature measuring instrument and a preset temperature detection time, wherein the outdoor temperature data includes a plurality of outdoor temperature values, and the outdoor temperature values ​​correspond to the electromotive force values ​​one by one; The electromotive force values ​​are extracted from the electromotive force data in sequence, and the following operations are performed on the extracted electromotive force values: The combustion temperature value is calculated using the pre-built temperature-electromotive force formula, the outdoor temperature value corresponding to the extracted electromotive force, and the electromotive force value; Summarize the combustion temperature values ​​to obtain combustion temperature data; The ignition temperature of the unburned biomass pellets and the temperature of the biomass ash are confirmed based on the combustion temperature data.

[0033] It should be explained that the temperature detection time refers to the time interval for temperature measurement using a thermocouple during the combustion process. The electromotive force value refers to the voltage generated by the thermocouple during the measurement process. The temperature measuring instrument refers to the equipment used to measure the room temperature. The outdoor temperature data refers to the ambient temperature outside the combustion chamber measured by the temperature measuring instrument and the cold junction during the combustion process.

[0034] Furthermore, the temperature-electromotive force formula includes: ; in, Indicates the combustion temperature value, Indicates the outdoor temperature value. represents the electromotive force value, Represents the Seebeck coefficient of the thermocouple.

[0035] It should be explained that the combustion temperature value refers to the actual temperature value at the hot junction of the thermocouple. The outdoor temperature value refers to the value of the outdoor ambient temperature of the vacuum combustion. The Seebeck coefficient of the thermocouple refers to the characteristic parameter of the thermocouple material, which describes the coefficient of the electromotive force generated under a unit temperature difference.

[0036] S4. Screening the biomass ash using a preset screening size to obtain biomass coarse ash and biomass fine ash.

[0037] Specifically, the diameter of the biomass coarse ash is larger than the screening size, and the diameter of the biomass fine ash is less than or equal to the screening size.

[0038] It should be explained that screening refers to a device used to screen biomass ash, which is an operation to separate biomass ash of different particle sizes by the size of the sieve holes. Biomass coarse ash refers to the ash of larger particles separated from biomass ash during the combustion process, and the diameter of the biomass coarse ash is larger than the screening size. Biomass fine ash refers to the remaining material after the biomass ash is screened.

[0039] S5. Perform heavy metal detection on the biomass coarse ash to obtain the coarse slag heavy metal value, and perform heavy metal detection on the biomass fine ash to obtain the fine ash heavy metal value.

[0040] In detail, the heavy metal detection of biomass coarse ash residue to obtain the heavy metal value of the coarse ash residue includes: Grinding the biomass coarse ash using a pre-built grinder and a preset coarse particle grinding time to obtain initial biomass powder; Extracting target biomass powder from the initial biomass powder according to a preset extraction weight, and digesting the target biomass powder using a pre-constructed digestion tank and pre-constructed concentrated nitric acid to obtain a pre-digestion solution; The pre-digestion solution is heated until the target biomass powder in the pre-digestion solution is completely dissolved to obtain a digestion solution; Using a pre-constructed constant volume solvent to adjust the volume of the digestion solution to obtain a constant volume solution; According to a preset solution detection ratio, extracting a sample ratio solution from the fixed volume solution, obtaining the absorbance of the standard solution, and obtaining a standard absorbance curve based on the absorbance of the standard solution, wherein the horizontal axis of the standard absorbance curve is the concentration and the vertical axis of the standard absorbance curve is the absorbance; Obtaining the sample absorbance of the sample ratio solution, and extracting the sample concentration corresponding to the sample absorbance from the standard absorbance curve; The sample heavy metal value is obtained according to the sample concentration and the pre-constructed heavy metal content formula, and the sample heavy metal value is confirmed as the coarse slag heavy metal value.

[0041] It should be explained that a grinder refers to a mechanical device used to grind biomass coarse ash into fine powder. Coarse particle grinding time refers to the time required to grind biomass coarse ash using a grinder. Initial biomass powder refers to biomass coarse ash after being processed by a grinder. Target biomass powder refers to the initial biomass powder extracted from the initial biomass powder according to a preset extraction weight. A digestion tank refers to a container specially used for chemical digestion, which is used to hold target biomass powder and digestion reagents.

[0042] It should be explained that concentrated nitric acid is a strong acid, which is often used in the chemical digestion process to help decompose the target biomass powder and dissolve the target biomass powder in the solution. The pre-digestion solution refers to the incompletely dissolved mixed solution obtained by mixing the target biomass powder with concentrated nitric acid. The digestion solution refers to the final solution obtained by heating the pre-digestion solution to completely dissolve the target biomass powder. The sample proportion solution refers to a part of the solution extracted from the fixed volume solution according to the preset solution detection ratio, which is used for heavy metal detection. The sample concentration refers to the concentration of heavy metal ions in the sample proportion solution.

[0043] It is understandable that obtaining the absorbance of a standard solution refers to the absorbance value of a standard solution of known concentration at a specific wavelength, and the absorbance of a standard solution described in an embodiment of the present invention refers to the absorbance of a standard solution obtained from historical detection. The step of obtaining a standard absorbance curve based on the absorbance of a standard solution is as follows: the concentration of each standard solution and the corresponding absorbance value are recorded, and a standard absorbance curve is drawn with the concentration as the horizontal axis and the absorbance as the vertical axis. The heavy metal value of the crude slag refers to the concentration of heavy metals in the biomass crude ash residue detected by the above steps. A constant volume solution refers to a solution in which a constant volume solvent is added to a digestion solution to dilute the digestion solution to a fixed volume.

[0044] Importantly, the steps of performing heavy metal detection on biomass fine ash and obtaining the heavy metal value of the fine ash described in the embodiment of the present invention are the same as the steps of performing heavy metal detection on biomass coarse ash, and will not be repeated here.

[0045] In detail, the heavy metal content formula is as follows: ; in, Indicates the heavy metal value of the sample, represents the sample concentration, represents the volume of the fixed solution, represents the dilution factor, represents the volume of the sample ratio solution, and H represents the recovery factor.

[0046] It should be explained that the sample heavy metal value refers to the value calculated by the heavy metal content formula, which represents the heavy metal content detected in the sample. The dilution factor refers to a correction factor used to correct the result of diluting the sample during the test. For example, Xiao Zhang took out 100 ml of sample ratio solution from the fixed volume solution and diluted the 100 ml sample ratio solution to 1000 ml. The dilution factor calculation process is as follows: ; in, Indicates the dilution factor.

[0047] Importantly, the recovery factor is a correction factor used to correct for the heavy metal loss that may occur during sample processing. For example, the heavy metal content in the pre-digestion solution is 10 mg. After digestion and volume adjustment, the actual detected heavy metal content is 9.5 mg. The calculation process of the recovery factor is as follows: ; in, Represents the recovery rate factor.

[0048] S6. Determine whether there is a heavy metal value greater than a preset standard threshold value in the coarse slag heavy metal value and the fine ash heavy metal value. If it is confirmed that the coarse slag heavy metal value or the fine ash heavy metal value is greater than the preset standard threshold value, perform heavy metal separation on the biomass coarse ash slag corresponding to the coarse slag metal value greater than the preset standard threshold value or the biomass fine ash corresponding to the fine ash heavy metal value to obtain separated biomass and heavy metals.

[0049] It should be explained that the coarse slag heavy metal value refers to the content of heavy metals in the biomass coarse ash slag produced after the combustion of unburned biomass particles. The fine ash heavy metal value refers to the content of heavy metals in the biomass fine ash produced by the combustion of biomass. The preset standard threshold refers to the maximum allowable content of heavy metals in slag or fine ash specified by a preset national or regional environmental protection law. The step of separating heavy metals from biomass slag or fine ash with a heavy metal value greater than the preset standard threshold is: using physical, chemical or biological methods to separate the heavy metals in the slag or fine ash from the biomass to reduce the environmental impact of heavy metals.

[0050] It can be understood that separated biomass means that in the heavy metal separation process, the heavy metal value of biomass ash or fine ash is separated from the heavy metals to obtain biomass materials with no or low heavy metal content. Heavy metals refer to metal elements with a density greater than 5g / cm³.

[0051] S7. Obtain the type of heavy metals according to the heavy metals, and perform acid washing on the heavy metals according to the type of heavy metals to obtain a neutralization solution.

[0052] In detail, the process of acid washing the heavy metals according to the types of the heavy metals to obtain a neutralized solution comprises: A pickling solution is prepared according to the type of heavy metals, and the pickling solution is poured into a pre-constructed pickling tank to obtain a pre-pickling solution, deionized water is obtained according to a preset dilution volume, and a pickling agent is obtained according to the pre-pickling solution and the deionized water; According to a preset standard weight, standard heavy metals are extracted from heavy metals, the standard heavy metals are pickled with a pickling agent to obtain an initial pickling solution, and a pH value of the solution is obtained according to the initial pickling solution and a pre-built pH tester; Obtain a standard pH threshold, and obtain a pH difference value according to the pH value of the solution and the standard pH threshold; Determining whether the pH difference is within a preset pH difference range; If it is confirmed that the pH difference is not within the preset pH difference interval, determine whether the pH difference is positive or negative; if the pH difference is positive, acidify the initial pickling solution with a pre-constructed acidic substance to obtain a first pH value solution, obtain a first pH value of the first pH value solution, take the first pH value as the solution pH value, return to the step of obtaining the pH difference according to the solution pH value and the standard pH threshold value, until the pH difference is within the preset pH difference interval, and obtain a neutralized solution; If the pH difference is a negative value, the initial pickling solution is alkalized by a pre-constructed alkaline substance to obtain a second pH value solution, and the second pH value of the second pH value solution is obtained. The second pH value is used as the solution pH value, and the step of obtaining the pH difference according to the solution pH value and the standard pH threshold is returned until the pH difference is within the preset pH difference range to obtain a neutralized solution.

[0053] It should be explained that the step of preparing the pickling solution according to the type of heavy metal is: according to the chemical properties of the heavy metal to be treated, a suitable acid or acid mixture is selected to prepare the pickling solution. The pickling tank refers to a device used to contain the pickling solution and the heavy metal to be treated, and to carry out a pickling reaction on the heavy metal to be treated. The pre-pickling solution refers to a solution prepared for pickling by pouring the prepared pickling solution into the pickling tank before the formal pickling. The pickling agent refers to the solution after deionized water is added to the pre-pickling solution. Deionized water refers to a liquid used to adjust the pH value of the pickling solution. Standard weight refers to a pre-set weight.

[0054] Importantly, standard heavy metals refer to heavy metal samples extracted according to a preset standard weight for pickling test. Initial pickling solution refers to a solution obtained by reacting a pickling agent with a standard heavy metal. A pH tester is an instrument for measuring the pH value of a solution. The pH tester described in the embodiment of the present invention is an instrument for measuring the pH value of an initial pickling solution. The standard pH threshold refers to a target pH value pre-set during the pickling process. The pH difference refers to the difference between the actually measured pH value and the standard pH threshold.

[0055] It is understood that the first pH value solution refers to a solution adjusted by adding an acidic substance when the pH difference is a positive value. The first pH value refers to the pH value of the first pH value solution. The second pH value solution refers to a solution adjusted by adding an alkaline substance when the pH difference is a negative value. The second pH value refers to the pH value of the second pH value solution.

[0056] S8. Detect the gas safety index of the combustion gas. If the gas safety index is less than a preset first gas threshold, the combustion gas is confirmed as a safe combustion gas. If the gas safety index is greater than or equal to the preset first gas threshold and less than a preset second gas threshold, a denitration or desulfurization operation is performed on the combustion gas until the gas safety index is less than the preset first gas threshold to obtain safe combustion gas. If the gas safety index is greater than or equal to the second gas threshold, a denitration operation is performed on the combustion gas to obtain an initial combustion gas, and a desulfurization operation is performed on the initial combustion gas to obtain an optimized combustion gas. The optimized combustion gas is the combustion gas, and the process returns to the step of detecting the gas safety index of the combustion gas until the gas safety index is less than the preset first gas threshold to obtain a safe combustion gas.

[0057] In detail, the gas safety index of the combustion gas is detected, including: Obtaining a composite gas concentration based on the combustion gas and a pre-constructed integrated gas collection device, wherein the composite gas concentration includes one or more gas concentrations, and wherein the integrated gas collection device includes multiple gas collection devices; Obtain nitrogen oxide concentration and sulfur dioxide concentration according to the gas composite concentration, and obtain safe nitrogen oxide concentration threshold and safe sulfur dioxide concentration threshold; The gas safety index of the combustion gas is calculated using the pre-built gas safety index formula, nitrogen oxide concentration, sulfur dioxide concentration, safe nitrogen oxide concentration threshold, and safe sulfur dioxide concentration threshold.

[0058] It should be explained that the integrated gas collection device refers to a device used to collect multiple gas components in the combustion gas. The steps of obtaining the safe nitrogen oxide concentration threshold and the safe sulfur dioxide concentration threshold are: obtaining the safe nitrogen oxide concentration threshold and the safe sulfur dioxide concentration threshold according to national or industry emission standards.

[0059] The gas safety index is a comprehensive indicator used to assess whether the concentrations of nitrogen oxides and sulfur dioxide in combustion gases are safe.

[0060] In detail, the gas safety index formula is as follows: ; in, Indicates the gas safety index, represents the weight coefficient of nitrogen oxides, is the concentration of nitrogen oxides, Indicates the safe nitrogen oxide concentration threshold, represents the weight coefficient of sulfur dioxide, represents the sulfur dioxide concentration, Indicates the safe sulfur dioxide concentration threshold.

[0061] It should be explained that the weight coefficient of nitrogen oxides refers to a parameter used to measure the importance of nitrogen oxides in the calculation of the gas safety index. The weight coefficient of sulfur dioxide refers to a parameter used to measure the importance of sulfur dioxide in the calculation of the gas safety index. The safe nitrogen oxide concentration threshold refers to the maximum concentration of nitrogen oxides allowed during the combustion process. The safe sulfur dioxide concentration threshold refers to the maximum concentration of sulfur dioxide allowed during the combustion process.

[0062] S9. Based on the comprehensive combustion characteristic index value, separated biomass, safe combustion gas and neutralization solution, denitrification based on biomass particle combustion is completed.

[0063] It should be explained that safe combustion gas refers to combustion gas that has been tested and processed to ensure that the gas safety index is lower than the preset first gas threshold. Neutralization solution refers to a solution that has been repeatedly adjusted and the pH difference is within a preset range.

[0064] The present invention is to solve the problems described in the background technology. The present invention obtains biomass raw materials and a vacuum combustion chamber, obtains biomass particles according to the biomass raw materials, and introduces the biomass particles into the vacuum combustion chamber to obtain unburned biomass particles. The present invention uses the vacuum combustion chamber to ensure that the combustion process is carried out in a controllable environment, avoids interference with combustion by external factors, improves combustion efficiency and safety, receives instructions for burning biomass particles, performs combustion operations on unburned biomass particles according to the instructions for burning biomass particles, and uses a preset gas ratio to transport pre-constructed oxygen to the vacuum combustion chamber to obtain biomass ash and combustion gas. The present invention accurately controls the supply of oxygen to avoid excessive combustion and nitrogen oxide generation caused by excessive oxygen, and at the same time improves combustion efficiency. The present invention obtains the comprehensive combustion characteristic index value of biomass particles from the biomass ash and unburned biomass particles. The present invention monitors the combustion efficiency and environmental protection through the comprehensive combustion characteristic index value, provides data support for optimizing the combustion conditions, and screens the biomass ash with a preset screening size to obtain biomass coarse ash and biomass fine ash, wherein the diameter of the biomass coarse ash is greater than the screening size, and the diameter of the biomass fine ash is less than or equal to the screening size. The present invention classifies the biomass ash to facilitate subsequent heavy metal detection and separation, improve resource utilization efficiency and reduce time, perform heavy metal detection on the biomass coarse ash to obtain the coarse ash heavy metal value, perform heavy metal detection on the biomass fine ash to obtain the fine ash heavy metal value, and the present invention detects the heavy metal content in the ash. Ensure that the pollution to the environment during the combustion process is controllable, determine whether there is a heavy metal value greater than a preset standard threshold in the coarse slag heavy metal value and the fine ash heavy metal value. The present invention controls heavy metal emissions by setting a standard threshold to avoid harm to the environment and human health. If it is confirmed that the coarse slag heavy metal value or the fine ash heavy metal value is greater than the preset standard threshold, then the biomass coarse ash slag corresponding to the coarse slag metal value greater than the preset standard threshold or the biomass fine ash corresponding to the fine ash heavy metal value is subjected to heavy metal separation to obtain separated biomass and heavy metals. The separated biomass and heavy metals in the present invention can be used separately to realize resource utilization. The type of heavy metal is obtained according to the heavy metal, and the heavy metal is acid-washed according to the type of heavy metal to obtain a neutralization solution. The present invention uses acid Wash away heavy metals to reduce pollution to the environment, detect the gas safety index of the combustion gas, the present invention evaluates the pollutant content of the combustion gas through the gas safety index to ensure that the combustion process meets environmental protection standards, if the gas safety index is less than the preset first gas threshold, the combustion gas is confirmed as safe combustion gas, if the gas safety index is greater than or equal to the preset first gas threshold and less than the preset second gas threshold, then perform denitrification or desulfurization operations on the combustion gas until the gas safety index is less than the preset first gas threshold to obtain safe combustion gas, the present invention selects a suitable pollutant treatment method such as denitrification or desulfurization according to the level of the gas safety index, ensures safe gas discharge, avoids unnecessary treatment of low-pollution gas, and improves efficiency,If the gas safety index is greater than or equal to the second gas threshold, a denitrification operation is performed on the combustion gas to obtain an initial combustion gas, and a desulfurization operation is performed on the initial combustion gas to obtain an optimized combustion gas. The optimized combustion gas is used as the combustion gas, and the step of detecting the gas safety index of the combustion gas is returned until the gas safety index is less than the preset first gas threshold to obtain a safe combustion gas. The present invention completely removes nitrogen oxides and sulfur dioxide from the combustion gas through a combined operation of denitrification and desulfurization to ensure that emissions meet standards. Denitrification based on biomass particle combustion is completed based on a comprehensive combustion characteristic index value, separated biomass, safe combustion gas, and a neutralization solution. The present invention ensures that the denitrification process is efficiently completed through full-process optimization and pollutant treatment. Therefore, the present invention can effectively separate and recover heavy metals from biomass ash and reduce environmental pollution. ,

[0065] like Figure 2 , which is a functional module diagram of a denitrification system based on biomass particle combustion provided by one embodiment of the present invention.

[0066] The denitration system 100 based on biomass particle combustion of the present invention can be installed in an electronic device. According to the functions to be implemented, the denitration system 100 based on biomass particle combustion can include a biomass particle combustion module 101, a biomass ash treatment module 102, a combustion gas detection module 103 and a denitration process completion module 104. The module of the present invention can also be referred to as a unit, which refers to a series of computer program segments that can be executed by an electronic device processor and can complete fixed functions, which are stored in the memory of the electronic device; The biomass particle combustion module 101 is used to obtain a biomass raw material and a vacuum combustion chamber, obtain biomass particles according to the biomass raw material, and introduce the biomass particles into the vacuum combustion chamber to obtain unburned biomass particles, receive a biomass particle combustion instruction, perform a combustion operation on the unburned biomass particles according to the biomass particle combustion instruction, and use a preset gas ratio to transport pre-constructed oxygen to the vacuum combustion chamber to obtain biomass ash and combustion gas, and obtain a comprehensive combustion characteristic index value of the biomass particles according to the biomass ash and the unburned biomass particles; The biomass ash processing module 102 is used to screen the biomass ash using a preset screening size to obtain biomass coarse ash and biomass fine ash, wherein the diameter of the biomass coarse ash is greater than the screening size, and the diameter of the biomass fine ash is less than or equal to the screening size, perform heavy metal detection on the biomass coarse ash to obtain a coarse slag heavy metal value, perform heavy metal detection on the biomass fine ash to obtain a fine ash heavy metal value, determine whether there is a heavy metal value greater than a preset standard threshold in the coarse slag heavy metal value and the fine ash heavy metal value, if it is confirmed that the coarse slag heavy metal value or the fine ash heavy metal value is greater than the preset standard threshold, then perform heavy metal separation on the biomass coarse ash corresponding to the coarse slag metal value greater than the preset standard threshold or the biomass fine ash corresponding to the fine ash heavy metal value to obtain separated biomass and heavy metals, obtain the type of heavy metal according to the heavy metal, and acid wash the heavy metal according to the type of heavy metal to obtain a neutralization solution; The combustion gas detection module 103 is used to detect the gas safety index of the combustion gas. If the gas safety index is less than a preset first gas threshold, the combustion gas is confirmed as a safe combustion gas. If the gas safety index is greater than or equal to the preset first gas threshold and less than a preset second gas threshold, a denitration or desulfurization operation is performed on the combustion gas until the gas safety index is less than the preset first gas threshold to obtain a safe combustion gas. If the gas safety index is greater than or equal to the second gas threshold, a denitration operation is performed on the combustion gas to obtain an initial combustion gas, and a desulfurization operation is performed on the initial combustion gas to obtain an optimized combustion gas, the optimized combustion gas is the combustion gas, and the step of detecting the gas safety index of the combustion gas is returned until the gas safety index is less than the preset first gas threshold to obtain a safe combustion gas. The denitration process completion module 104 is used to complete denitration based on the combustion of biomass particles based on the comprehensive combustion characteristic index value, separated biomass, safe combustion gas and neutralization solution.

[0067] In detail, each module in the biomass particle combustion-based denitrification system 100 of the embodiment of the present invention is used in the same manner as described above. Figure 1 The denitrification method based on biomass particle combustion described in the invention has the same technical means and can produce the same technical effects, so it will not be repeated here.

[0068] like Figure 3 , which is a schematic diagram of the structure of an electronic device for implementing a denitrification method based on biomass particle combustion provided by an embodiment of the present invention.

[0069] The electronic device 1 may include a processor 10, a memory 11 and a bus 12, and may also include a computer program stored in the memory 11 and executable on the processor 10, such as a denitrification method program based on biomass particle combustion.

[0070] The memory 11 includes at least one type of readable storage medium, including flash memory, mobile hard disk, multimedia card, card-type memory (e.g., SD or DX memory, etc.), magnetic memory, disk, optical disk, etc. In some embodiments, the memory 11 may be an internal storage unit of the electronic device 1, such as a mobile hard disk of the electronic device 1. In other embodiments, the memory 11 may also be an external storage device of the electronic device 1, such as a plug-in mobile hard disk, a smart memory card (Smart Media Card, SMC), a secure digital (SecureDigital, SD) card, a flash card (Flash Card), etc. equipped on the electronic device 1. Further, the memory 11 also includes an internal storage unit of the electronic device 1 and an external storage device. The memory 11 can not only be used to store application software and various types of data installed in the electronic device 1, such as the code of the denitrification method program based on biomass particle combustion, but also can be used to temporarily store data that has been output or is to be output.

[0071] The processor 10 may be composed of an integrated circuit in some embodiments, for example, a single packaged integrated circuit, or a plurality of packaged integrated circuits with the same or different functions, including one or more central processing units (CPUs), microprocessors, digital processing chips, graphics processors, and combinations of various control chips, etc. The processor 10 is the control core (Control Unit) of the electronic device, and uses various interfaces and lines to connect various components of the entire electronic device, and executes or executes programs or modules (such as a denitrification method program based on biomass particle combustion, etc.) stored in the memory 11, and calls data stored in the memory 11 to execute various functions of the electronic device 1 and process data.

[0072] The bus 12 may be a peripheral component interconnect (PCI) bus or an extended industry standard architecture (EISA) bus, etc. The bus 12 may be divided into an address bus, a data bus, a control bus, etc. The bus 12 is configured to realize connection and communication between the memory 11 and at least one processor 10, etc.

[0073] Figure 3 Only an electronic device with components is shown, and those skilled in the art will understand that Figure 3The structure shown does not constitute a limitation on the electronic device 1, and may include fewer or more components than shown in the figure, or combine certain components, or arrange the components differently.

[0074] For example, although not shown, the electronic device 1 may also include a power source (such as a battery) for supplying power to various components. Preferably, the power source may be logically connected to the at least one processor 10 through a power management device, so that the power management device can realize functions such as charging management, discharging management, and power consumption management. The power source may also include one or more DC or AC power sources, recharging devices, power failure detection circuits, power converters or inverters, power status indicators, and other arbitrary components. The electronic device 1 may also include a variety of sensors, Bluetooth modules, Wi-Fi modules, etc., which will not be repeated here.

[0075] Furthermore, the electronic device 1 may also include a network interface. Optionally, the network interface may include a wired interface and / or a wireless interface (such as a WI-FI interface, a Bluetooth interface, etc.), which is generally used to establish a communication connection between the electronic device 1 and other electronic devices.

[0076] Optionally, the electronic device 1 may further include a user interface, which may be a display, an input unit (such as a keyboard), or a standard wired interface or a wireless interface. Optionally, in some embodiments, the display may be an LED display, a liquid crystal display, a touch-sensitive liquid crystal display, and an OLED (Organic Light-Emitting Diode) touch device. The display may also be appropriately referred to as a display screen or a display unit, which is used to display information processed in the electronic device 1 and to display a visual user interface.

[0077] The denitration method program based on biomass particle combustion stored in the memory 11 of the electronic device 1 is a combination of multiple instructions. When running in the processor 10, it can achieve: Obtaining a biomass raw material and a vacuum combustion chamber, obtaining biomass particles according to the biomass raw material, and introducing the biomass particles into the vacuum combustion chamber to obtain unburned biomass particles; Receiving a biomass particle burning instruction, performing a combustion operation on unburned biomass particles according to the biomass particle burning instruction, and delivering pre-constructed oxygen to the vacuum combustion chamber using a preset gas ratio to obtain biomass ash and combustion gas; Obtaining a comprehensive combustion characteristic index value of biomass pellets based on biomass ash and unburned biomass pellets; Screening the biomass ash using a preset screening size to obtain biomass coarse ash and biomass fine ash, wherein the diameter of the biomass coarse ash is greater than the screening size, and the diameter of the biomass fine ash is less than or equal to the screening size; Perform heavy metal detection on biomass coarse ash to obtain the coarse slag heavy metal value, and perform heavy metal detection on biomass fine ash to obtain the fine ash heavy metal value; Determine whether there is a heavy metal value greater than a preset standard threshold value in the coarse slag heavy metal value and the fine ash heavy metal value; If it is confirmed that the heavy metal value of the coarse slag or the heavy metal value of the fine ash is greater than the preset standard threshold, heavy metal separation is performed on the biomass coarse ash slag corresponding to the coarse slag metal value or the biomass fine ash corresponding to the fine ash heavy metal value greater than the preset standard threshold to obtain separated biomass and heavy metals; Obtain the type of heavy metals according to the heavy metals, and perform acid washing on the heavy metals according to the type of heavy metals to obtain a neutralization solution; Detect the gas safety index of combustion gas; If the gas safety index is less than the preset first gas threshold, the combustion gas is confirmed as safe combustion gas; If the gas safety index is greater than or equal to a preset first gas threshold and less than a preset second gas threshold, denitration or desulfurization operation is performed on the combustion gas until the gas safety index is less than the preset first gas threshold to obtain safe combustion gas; If the gas safety index is greater than or equal to the second gas threshold, a denitration operation is performed on the combustion gas to obtain an initial combustion gas, and a desulfurization operation is performed on the initial combustion gas to obtain an optimized combustion gas, the optimized combustion gas is used as the combustion gas, and the process returns to the step of detecting the gas safety index of the combustion gas until the gas safety index is less than the preset first gas threshold to obtain a safe combustion gas; Denitrification based on biomass particle combustion is completed based on the comprehensive combustion characteristic index value, separated biomass, safe combustion gas and neutralization solution.

[0078] Specifically, the specific implementation method of the processor 10 for the above instructions can refer to Figures 1 to 3 The description of the relevant steps in the corresponding embodiments will not be repeated here.

[0079] Furthermore, if the module / unit integrated in the electronic device 1 is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. The computer-readable storage medium can be volatile or non-volatile. For example, the computer-readable medium can include: any entity or device capable of carrying the computer program code, a recording medium, a USB flash drive, a mobile hard disk, a magnetic disk, an optical disk, a computer memory, and a read-only memory (ROM).

[0080] The present invention further provides a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program, and when the computer program is executed by a processor of an electronic device, the computer program can implement: Obtaining a biomass raw material and a vacuum combustion chamber, obtaining biomass particles according to the biomass raw material, and introducing the biomass particles into the vacuum combustion chamber to obtain unburned biomass particles; Receiving a biomass particle burning instruction, performing a combustion operation on unburned biomass particles according to the biomass particle burning instruction, and delivering pre-constructed oxygen to the vacuum combustion chamber using a preset gas ratio to obtain biomass ash and combustion gas; Obtaining a comprehensive combustion characteristic index value of biomass pellets based on biomass ash and unburned biomass pellets; Screening the biomass ash using a preset screening size to obtain biomass coarse ash and biomass fine ash, wherein the diameter of the biomass coarse ash is greater than the screening size, and the diameter of the biomass fine ash is less than or equal to the screening size; Perform heavy metal detection on biomass coarse ash to obtain the coarse slag heavy metal value, and perform heavy metal detection on biomass fine ash to obtain the fine ash heavy metal value; Determine whether there is a heavy metal value greater than a preset standard threshold value in the coarse slag heavy metal value and the fine ash heavy metal value; If it is confirmed that the heavy metal value of the coarse slag or the heavy metal value of the fine ash is greater than the preset standard threshold, heavy metal separation is performed on the biomass coarse ash slag corresponding to the coarse slag metal value or the biomass fine ash corresponding to the fine ash heavy metal value greater than the preset standard threshold to obtain separated biomass and heavy metals; Obtain the type of heavy metals according to the heavy metals, and perform acid washing on the heavy metals according to the type of heavy metals to obtain a neutralization solution; Detect the gas safety index of combustion gas; If the gas safety index is less than the preset first gas threshold, the combustion gas is confirmed as safe combustion gas; If the gas safety index is greater than or equal to a preset first gas threshold and less than a preset second gas threshold, denitration or desulfurization operation is performed on the combustion gas until the gas safety index is less than the preset first gas threshold to obtain safe combustion gas; If the gas safety index is greater than or equal to the second gas threshold, a denitration operation is performed on the combustion gas to obtain an initial combustion gas, and a desulfurization operation is performed on the initial combustion gas to obtain an optimized combustion gas, the optimized combustion gas is used as the combustion gas, and the process returns to the step of detecting the gas safety index of the combustion gas until the gas safety index is less than the preset first gas threshold to obtain a safe combustion gas; Denitrification based on biomass particle combustion is completed based on the comprehensive combustion characteristic index value, separated biomass, safe combustion gas and neutralization solution.

[0081] In the several embodiments provided by the present invention, it should be understood that the disclosed devices, systems and methods can be implemented in other ways. For example, the system embodiments described above are only illustrative, and actual implementation may have other division methods.

[0082] The modules described as separate components may or may not be physically separated, and the components shown as modules may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0083] In addition, each functional module in each embodiment of the present invention may be integrated into one processing unit, each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of hardware plus software functional modules.

[0084] It is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention.

[0085] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the present invention.

Claims

1. A denitrification method based on biomass particle combustion, characterized in that: The method comprises: Obtaining a biomass raw material and a vacuum combustion chamber, obtaining biomass particles according to the biomass raw material, and introducing the biomass particles into the vacuum combustion chamber to obtain unburned biomass particles; Receiving a biomass particle burning instruction, performing a combustion operation on unburned biomass particles according to the biomass particle burning instruction, and delivering pre-constructed oxygen to the vacuum combustion chamber using a preset gas ratio to obtain biomass ash and combustion gas; Obtaining a comprehensive combustion characteristic index value of biomass pellets based on biomass ash and unburned biomass pellets; Screening the biomass ash using a preset screening size to obtain biomass coarse ash and biomass fine ash, wherein the diameter of the biomass coarse ash is greater than the screening size, and the diameter of the biomass fine ash is less than or equal to the screening size; Perform heavy metal detection on biomass coarse ash to obtain the coarse slag heavy metal value, and perform heavy metal detection on biomass fine ash to obtain the fine ash heavy metal value; Determine whether there is a heavy metal value greater than a preset standard threshold value in the coarse slag heavy metal value and the fine ash heavy metal value; If it is confirmed that the heavy metal value of the coarse slag or the heavy metal value of the fine ash is greater than the preset standard threshold, heavy metal separation is performed on the biomass coarse ash slag corresponding to the coarse slag metal value or the biomass fine ash corresponding to the fine ash heavy metal value greater than the preset standard threshold to obtain separated biomass and heavy metals; Obtain the type of heavy metals according to the heavy metals, and perform acid washing on the heavy metals according to the type of heavy metals to obtain a neutralization solution; Detect the gas safety index of combustion gas; If the gas safety index is less than the preset first gas threshold, the combustion gas is confirmed as safe combustion gas; If the gas safety index is greater than or equal to a preset first gas threshold and less than a preset second gas threshold, denitration or desulfurization operation is performed on the combustion gas until the gas safety index is less than the preset first gas threshold to obtain safe combustion gas; If the gas safety index is greater than or equal to the second gas threshold, a denitration operation is performed on the combustion gas to obtain an initial combustion gas, and a desulfurization operation is performed on the initial combustion gas to obtain an optimized combustion gas, the optimized combustion gas is used as the combustion gas, and the process returns to the step of detecting the gas safety index of the combustion gas until the gas safety index is less than the preset first gas threshold to obtain a safe combustion gas; Denitrification based on biomass particle combustion is completed based on the comprehensive combustion characteristic index value, separated biomass, safe combustion gas and neutralization solution.

2. The denitrification method based on biomass particle combustion according to claim 1, characterized in that: The method of obtaining the comprehensive combustion characteristic index value of the biomass particles according to the biomass ash and the unburned biomass particles includes: Obtain the mass of unburned biomass particles and the mass of biomass ash; The ignition temperature of the unburned biomass particles and the temperature of the biomass ash are obtained by using a pre-built thermocouple, wherein the thermocouple includes: a hot junction and a cold junction; The comprehensive combustion characteristic index value of the biomass particles is calculated using the pre-constructed comprehensive combustion characteristic index formula, the mass of the unburned biomass particles, the mass of the biomass ash, the ignition temperature of the unburned biomass particles and the temperature of the biomass ash. The calculation formula is as follows: ； in, Indicates the comprehensive combustion characteristic index value, represents the maximum burning rate, represents the ignition temperature of unburned biomass particles, represents the temperature of biomass ash, represents the heating rate, represents the mass of unburned biomass particles, Indicates the mass of biomass ash, Indicates the mass change of unburned biomass particles during the combustion process. Indicates the time change corresponding to the mass change.

3. The denitrification method based on biomass particle combustion according to claim 2, characterized in that: The method of obtaining the ignition temperature of unburned biomass particles and the temperature of biomass ash by using a pre-built thermocouple includes: Acquiring electromotive force data of unburned biomass particles using the hot junction and a preset temperature detection time, wherein the hot junction is located inside the unburned biomass particles, wherein the electromotive force data includes a plurality of electromotive force values; Acquiring outdoor temperature data using the cold junction, a pre-built temperature measuring instrument and a preset temperature detection time, wherein the outdoor temperature data includes a plurality of outdoor temperature values, and the outdoor temperature values ​​correspond to the electromotive force values ​​one by one; The electromotive force values ​​are extracted from the electromotive force data in sequence, and the following operations are performed on the extracted electromotive force values: The combustion temperature value is calculated using the pre-built temperature-electromotive force formula, the outdoor temperature value corresponding to the extracted electromotive force, and the electromotive force value; Summarize the combustion temperature values ​​to obtain combustion temperature data; The ignition temperature of the unburned biomass pellets and the temperature of the biomass ash are confirmed based on the combustion temperature data.

4. The denitrification method based on biomass particle combustion according to claim 3, characterized in that: The temperature-electromotive force formula includes: ； in, Indicates the combustion temperature value, Indicates the outdoor temperature value. represents the electromotive force value, Represents the Seebeck coefficient of the thermocouple.

5. The denitrification method based on biomass particle combustion according to claim 4, characterized in that: The method of performing heavy metal detection on the biomass coarse ash to obtain the heavy metal value of the coarse ash includes: Grinding the biomass coarse ash using a pre-built grinder and a preset coarse particle grinding time to obtain initial biomass powder; Extracting target biomass powder from the initial biomass powder according to a preset extraction weight, and digesting the target biomass powder using a pre-constructed digestion tank and pre-constructed concentrated nitric acid to obtain a pre-digestion solution; The pre-digestion solution is heated until the target biomass powder in the pre-digestion solution is completely dissolved to obtain a digestion solution; Using a pre-constructed constant volume solvent to adjust the volume of the digestion solution to obtain a constant volume solution; According to a preset solution detection ratio, extracting a sample ratio solution from the fixed volume solution, obtaining the absorbance of the standard solution, and obtaining a standard absorbance curve based on the absorbance of the standard solution, wherein the horizontal axis of the standard absorbance curve is the concentration and the vertical axis of the standard absorbance curve is the absorbance; Obtaining the sample absorbance of the sample ratio solution, and extracting the sample concentration corresponding to the sample absorbance from the standard absorbance curve; The sample heavy metal value is obtained according to the sample concentration and the pre-constructed heavy metal content formula, and the sample heavy metal value is confirmed as the coarse slag heavy metal value.

6. The denitrification method based on biomass particle combustion according to claim 5, characterized in that: The heavy metal content formula is as follows: ； in, Indicates the heavy metal value of the sample, represents the sample concentration, represents the volume of the fixed solution, represents the dilution factor, represents the volume of the sample ratio solution, and H represents the recovery factor.

7. The denitrification method based on biomass particle combustion according to claim 6, characterized in that: The process of acid washing the heavy metals according to the types of the heavy metals to obtain a neutralized solution comprises: A pickling solution is prepared according to the type of heavy metals, and the pickling solution is poured into a pre-constructed pickling tank to obtain a pre-pickling solution, deionized water is obtained according to a preset dilution volume, and a pickling agent is obtained according to the pre-pickling solution and the deionized water; According to a preset standard weight, standard heavy metals are extracted from heavy metals, the standard heavy metals are pickled with a pickling agent to obtain an initial pickling solution, and a pH value of the solution is obtained according to the initial pickling solution and a pre-built pH tester; Obtain a standard pH threshold, and obtain a pH difference value according to the pH value of the solution and the standard pH threshold; Determining whether the pH difference is within a preset pH difference range; If it is confirmed that the pH difference is not within the preset pH difference interval, determine whether the pH difference is positive or negative; if the pH difference is positive, acidify the initial pickling solution with a pre-constructed acidic substance to obtain a first pH value solution, obtain a first pH value of the first pH value solution, take the first pH value as the solution pH value, return to the step of obtaining the pH difference according to the solution pH value and the standard pH threshold value, until the pH difference is within the preset pH difference interval, and obtain a neutralized solution; If the pH difference is a negative value, the initial pickling solution is alkalized by a pre-constructed alkaline substance to obtain a second pH value solution, and the second pH value of the second pH value solution is obtained. The second pH value is used as the solution pH value, and the step of obtaining the pH difference according to the solution pH value and the standard pH threshold is returned until the pH difference is within the preset pH difference range to obtain a neutralized solution.

8. The denitrification method based on biomass particle combustion according to claim 7, characterized in that: The gas safety index of the combustion gas is detected, including: Obtaining a composite gas concentration based on the combustion gas and a pre-constructed integrated gas collection device, wherein the composite gas concentration includes one or more gas concentrations, and wherein the integrated gas collection device includes multiple gas collection devices; Obtain nitrogen oxide concentration and sulfur dioxide concentration according to the gas composite concentration, and obtain safe nitrogen oxide concentration threshold and safe sulfur dioxide concentration threshold; The gas safety index of the combustion gas is calculated using the pre-built gas safety index formula, nitrogen oxide concentration, sulfur dioxide concentration, safe nitrogen oxide concentration threshold, and safe sulfur dioxide concentration threshold.

9. The denitrification method based on biomass particle combustion according to claim 8, characterized in that: The gas safety index formula is as follows: ； in, Indicates the gas safety index, represents the weight coefficient of nitrogen oxides, is the concentration of nitrogen oxides, Indicates the safe nitrogen oxide concentration threshold, represents the weight coefficient of sulfur dioxide, represents the sulfur dioxide concentration, Indicates the safe sulfur dioxide concentration threshold.

10. A denitrification system based on biomass particle combustion, characterized in that: The system comprises: A biomass particle combustion module is used to obtain a biomass raw material and a vacuum combustion chamber, obtain biomass particles according to the biomass raw material, and introduce the biomass particles into the vacuum combustion chamber to obtain unburned biomass particles, receive a biomass particle combustion instruction, perform a combustion operation on the unburned biomass particles according to the biomass particle combustion instruction, and use a preset gas ratio to transport pre-constructed oxygen to the vacuum combustion chamber to obtain biomass ash and combustion gas, and obtain a comprehensive combustion characteristic index value of the biomass particles according to the biomass ash and the unburned biomass particles; a biomass ash processing module, for screening the biomass ash using a preset screening size to obtain biomass coarse ash and biomass fine ash, wherein the diameter of the biomass coarse ash is greater than the screening size, and the diameter of the biomass fine ash is less than or equal to the screening size, performing heavy metal detection on the biomass coarse ash to obtain a coarse slag heavy metal value, performing heavy metal detection on the biomass fine ash to obtain a fine ash heavy metal value, judging whether there is a heavy metal value greater than a preset standard threshold value in the coarse slag heavy metal value and the fine ash heavy metal value, and if it is confirmed that the coarse slag heavy metal value or the fine ash heavy metal value is greater than the preset standard threshold value, then performing heavy metal separation on the biomass coarse ash corresponding to the coarse slag metal value greater than the preset standard threshold value or the biomass fine ash corresponding to the fine ash heavy metal value to obtain separated biomass and heavy metals, obtaining the type of heavy metal according to the heavy metal, and acid-washing the heavy metal according to the type of heavy metal to obtain a neutralization solution; a combustion gas detection module, for detecting a gas safety index of the combustion gas; if the gas safety index is less than a preset first gas threshold, the combustion gas is confirmed as a safe combustion gas; if the gas safety index is greater than or equal to the preset first gas threshold and less than a preset second gas threshold, a denitration or desulfurization operation is performed on the combustion gas until the gas safety index is less than the preset first gas threshold to obtain a safe combustion gas; if the gas safety index is greater than or equal to the second gas threshold, a denitration operation is performed on the combustion gas to obtain an initial combustion gas, and a desulfurization operation is performed on the initial combustion gas to obtain an optimized combustion gas, the optimized combustion gas is used as the combustion gas, and the step of detecting the gas safety index of the combustion gas is returned to until the gas safety index is less than the preset first gas threshold to obtain a safe combustion gas; The denitrification process completion module is used to complete the denitrification based on the combustion of biomass particles based on the comprehensive combustion characteristic index value, separated biomass, safe combustion gas and neutralization solution.

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