Intelligent energy-saving carbonization device based on thermal desorption secondary combustion waste heat and intelligent control system

Abstract

The invention provides an intelligent energy-saving carbonization device based on thermal desorption secondary combustion waste heat and an intelligent control system, the intelligent energy-saving carbonization device comprises a rotary kiln used for heating and carbonizing raw materials; the adjusting bin is used for controlling gas entering the rotary kiln, and the gas type and the ventilation capacity are included; the end, close to the adjusting bin, of the rotary kiln is connected with the raw material bin and the auxiliary material bin, and the quench tower is used for being connected with a gas outlet of the rotary kiln and cooling gas; the thermal desorption tail gas treatment module is used for performing innocent treatment on gas discharged from the quench tower; and the secondary combustion tail gas switching pipeline comprises a regulating valve, a first secondary combustion tail gas passage, a second secondary combustion tail gas passage and a third secondary combustion tail gas passage. Recycling and secondary combustion of secondary combustion tail gas are achieved through the secondary combustion tail gas switching pipeline, and the energy-saving effect is achieved by combining thermal desorption secondary combustion waste heat utilization.

Description

Technical Field

[0001] The present invention relates to an energy-saving intelligent biochar preparation device and an intelligent control system, belonging to the technical field of waste resource utilization equipment. Background Art

[0002] Thermal desorption is commonly used in the treatment of soil at organic contaminated sites and can be used to dispose of contaminated soil containing organic pollutants such as BTEX, petroleum hydrocarbons, and polycyclic aromatic hydrocarbons. However, extremely toxic dioxin / furan compounds may be generated during the heating process of organic contaminated soil. Therefore, these secondary pollutants are generally removed by secondary combustion at about 1200°C. The flue gas temperature after secondary combustion can reach about 1100°C, and the temperature is directly reduced by a quenching tower, resulting in a large amount of wasted heat energy. To achieve waste heat recovery, CN201510494401.1 stores the heat energy in a regenerator using a heat exchanger after secondary combustion and recycles it to the thermal desorption device. However, there is still heat energy loss during the heat exchange and heat storage processes, and the waste heat recovery efficiency needs to be improved.

[0003] Secondly, in contaminated sites involving remediation and redevelopment, the land usually needs to be leveled, and a large amount of garden waste such as trees and shrubs needs to be disposed of. Generally, it is transported to a designated garden waste treatment agency for harmless treatment. The main methods include landfill, composting, and biomass energy utilization. Among them, landfill cannot achieve resource utilization; due to the low nitrogen content of garden waste, the composting efficiency is poor; biomass energy utilization generally involves co-incineration with domestic waste or being transported alone to a special kiln for garden waste disposal for power generation. However, the volume of garden waste is large, and the transportation cost is high.

[0004] Biochar is an important form of waste resource utilization. Due to its large specific surface area, special pore structure, excellent redox properties, and numerous surface active sites, biochar materials are both an ideal adsorbent and an ideal advanced oxidation catalyst, capable of effectively activating advanced oxidants. At the same time, biochar can also provide an ideal growth site and shelter for microorganisms, facilitating the aggregation and reproduction of microorganisms. Immobilizing microorganisms with biochar can reduce biomass inactivation and enhance biological activity. As an important form of waste resource utilization, biochar has the benefits of carbon sequestration and emission reduction, and its green application will become an important path to achieve the "carbon neutral" concept of sustainable development in the 21st century. The structure, function, and other properties of biochar are closely related to the preparation process parameters (gas composition, temperature, etc.). Existing research shows that biochar materials fired at high temperatures have a higher pyridine content and a strong ability to catalytically generate persistent environmental free radicals, enabling the degradation of organic pollutants. Carbonizing biochar under different parameters is an efficient method for the resource utilization of biomass waste. Nevertheless, biochar generally needs to be fired at 300 - 600 °C, consuming a large amount of energy, and currently, batch firing is mainly used, making it difficult to achieve stable and continuous production. During the treatment and remediation of polluted sites, using the waste heat of thermal desorption to carbonize the site's garden waste and surrounding biomass at high temperatures can not only stably realize the resource utilization of waste biomass but also effectively improve the thermal energy utilization rate, achieving efficient and green sustainable soil pollution remediation. Summary of the Invention

[0005] The present invention provides an intelligent energy-saving carbonization device and an intelligent control system based on the waste heat of thermal desorption secondary combustion to achieve energy-saving carbonization and intelligent control.

[0006] The present invention discloses an intelligent energy-saving carbonization device based on the waste heat of thermal desorption secondary combustion, comprising:

[0007] A rotary kiln for heating and carbonizing raw materials;

[0008] A regulating bin for controlling the gas entering the rotary kiln, including gas type and ventilation volume;

[0009] A raw material bin and an auxiliary material bin, with one end of the rotary kiln close to the regulating bin connected to the raw material bin and the auxiliary material bin,

[0010] A quenching tower for connecting to the gas outlet of the rotary kiln and cooling the gas;

[0011] A thermal desorption tail gas treatment module for harmlessly treating the gas discharged from the quenching tower;

[0012] Secondary combustion tail gas switching pipeline, the secondary combustion tail gas switching pipeline includes a regulating valve, a first secondary combustion tail gas passage, a second secondary combustion tail gas passage, and a third secondary combustion tail gas passage. The first secondary combustion tail gas passage is connected to the second secondary combustion tail gas passage through the regulating valve. The first secondary combustion tail gas passage is also connected to the quench tower. The second secondary combustion tail gas passage is connected to the air inlet of the regulating chamber. The third secondary combustion tail gas passage is connected to the raw material bin, used for drying and preheating the raw materials, improving the carbonization efficiency of the rotary kiln and the waste heat utilization efficiency.

[0013] Further, the intelligent energy-saving carbonization device further includes a first tail gas recovery pipeline, and the first tail gas recovery pipeline is respectively connected to the raw material bin and the rotary kiln.

[0014] Further, temperature sensors and air pressure sensors are provided in both the regulating chamber and the rotary kiln, and a discharge bin is also provided at one end of the rotary kiln close to the quench tower.

[0015] Further, a high-temperature resistant filter screen is provided at one end of the regulating chamber close to the second secondary combustion tail gas passage, and a cleaning bin is also provided at one end of the regulating chamber close to the rotary kiln.

[0016] Even further, the intelligent energy-saving carbonization device further includes a nitrogen gas bin, and the nitrogen gas bin is connected to one end of the regulating chamber close to the second secondary combustion tail gas passage.

[0017] Even further, the first secondary combustion tail gas passage, the second secondary combustion tail gas passage, the third secondary combustion tail gas passage, and the tail gas recovery pipeline are all provided with a double-layer jacket heat preservation structure.

[0018] Further, the thermal desorption tail gas treatment module is a dry acid removal and activated carbon injection device.

[0019] Further, at the tail gas outlet of the thermal rotary kiln, a one-way valve is provided to prevent the gas from flowing back into the kiln and interfering with the thermal desorption process of the contaminated soil in the rotary kiln.

[0020] On the other hand, the present invention also discloses an intelligent control system applying the above intelligent energy-saving carbonization device, and the intelligent control system includes:

[0021] Intelligent parameter recommendation module, the intelligent parameter recommendation module is used to obtain the raw material type and recommend carbonization parameters based on the raw material type;

[0022] Operation control module, the operation control module is used to control the intelligent energy-saving carbonization device to carry out the carbonization process based on specific carbonization parameters;

[0023] Real-time monitoring module, the real-time monitoring module is used to monitor the specific working conditions of the intelligent energy-saving carbonization device during the carbonization process.

[0024] Further, the operation process of the intelligent control system includes:

[0025] S101: Obtain raw material matrix information;

[0026] S102: Based on the raw material matrix information, extract keywords, and obtain the processing parameters and sources matching the keywords, and use the processing parameters as the recommended carbonization parameters;

[0027] S103: Provide the recommended carbonization parameters to the staff, and confirm the operating parameters based on the staff's selection;

[0028] S104: Control the regulating valve so that the secondary combustion tail gas can enter the regulating chamber through the second path of the secondary combustion tail gas; control the regulating chamber and the rotary kiln to work based on the operating parameters;

[0029] S105: Obtain the temperature parameters and pressure parameters at the air inlet and outlet of the rotary kiln, control and adjust the regulating chamber, and save the adjustment process as process parameters;

[0030] S106: Run until the firing is completed and discharge the material;

[0031] S107: Start the next batch of firing, and repeat S101 - S106 until all batches are completed, then switch to connect the secondary combustion tail gas to the first path of the secondary combustion tail gas and perform post-treatment through the quenching tower.

[0032] Compared with the prior art, the present invention realizes the recycling and secondary combustion of the secondary combustion tail gas through the switching pipeline of the secondary combustion tail gas, and utilizes the regulating valve, the first path of the secondary combustion tail gas, the second path of the secondary combustion tail gas, and the third path of the secondary combustion tail gas. Combined with the waste heat utilization of the secondary combustion of thermal desorption, the energy-saving effect is achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a schematic structural diagram of the intelligent energy-saving carbonization device according to the embodiment of the present invention;

[0034] Figure 2 It is a schematic structural diagram of another intelligent energy-saving carbonization device according to the embodiment of the present invention;

[0035] Figure 3 It is a schematic structural diagram of the intelligent energy-saving carbonization device with a second tail gas recovery pipeline according to the embodiment of the present invention;

[0036] Figure 4 It is an operation block diagram of the intelligent control system according to the embodiment of the present invention;

[0037] Figure 5 It is an operation flow chart of the intelligent control system according to the embodiment of the present invention.

[0038] 1. Rotary kiln; 11. Discharge bin; 2. Regulation bin; 21. Cleaning and pollution removal bin; 22. High-temperature resistant filter screen; 3. Raw material bin; 4. Auxiliary material bin; 5. Quenching tower; 6. Thermal desorption equipment module; 71. First regulating valve; 72. Second regulating valve; 73. Check valve; 81. First path of secondary combustion exhaust gas; 82. Second path of secondary combustion exhaust gas; 83. Third path of secondary combustion exhaust gas; 91. First exhaust gas recovery pipeline; 92. Second exhaust gas recovery pipeline; 10. Nitrogen bin. Detailed implementation mode

[0039] In order to enable those skilled in the art to better understand the solution of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0040] The embodiment of the present invention discloses an intelligent energy-saving carbonization device based on the waste heat of secondary combustion of thermal desorption, as Figure 1 shown, including:

[0041] Rotary kiln, which is used for heating and carbonizing raw materials;

[0042] Regulation bin, which is used to control the gas entering the rotary kiln, including gas type and ventilation volume;

[0043] Raw material bin and auxiliary material bin, one end of the rotary kiln close to the regulation bin is connected to the raw material bin and the auxiliary material bin;

[0044] Quenching tower, which is used to be connected to the gas outlet of the rotary kiln and cool the gas;

[0045] Thermal desorption equipment module, which is used to harmlessly treat the gas discharged from the quenching tower;

[0046] Secondary combustion exhaust gas switching pipeline, which includes regulating valves, the first path of secondary combustion exhaust gas, the second path of secondary combustion exhaust gas, and the third path of secondary combustion exhaust gas. The first path of secondary combustion exhaust gas is connected to the second path of secondary combustion exhaust gas through a regulating valve. The first path of secondary combustion exhaust gas is also connected to the quenching tower. The second path of secondary combustion exhaust gas is connected to the air inlet of the regulation bin. The third path of secondary combustion exhaust gas is connected to the raw material bin and is used for drying and preheating the raw materials, improving the carbonization efficiency of the rotary kiln and the waste heat utilization efficiency.

[0047] Among them, the regulating valve is specifically a three-way valve, and there are multiple regulating valves, including the first valve and the second valve, as Figure 1As shown, the first valve is respectively connected to the second valve and the second passage of the secondary combustion exhaust gas. The first valve is also connected to an air inlet (not shown in the figure), and the air inlet can specifically be an air inlet for the secondary combustion exhaust gas to introduce the exhaust gas of the thermal desorption rotary kiln. The second valve is also connected to the first passage and the third passage of the secondary combustion exhaust gas. When starting to burn biochar, the second passage of the secondary combustion exhaust gas can be connected to the air inlet for the secondary combustion exhaust gas to allow the secondary combustion exhaust gas to flow in and be heated through the adjustment bin and the rotary kiln. After the burning is completed, the first passage of the secondary combustion exhaust gas and the air inlet for the secondary combustion exhaust gas can be connected to allow the secondary combustion exhaust gas to enter the subsequent cooling and treatment steps through the first passage of the secondary combustion exhaust gas. This solution enables the secondary combustion exhaust gas to flow to the adjustment bin and the rotary kiln, reusing the heat of the exhaust gas. After the waste heat of the high-temperature exhaust gas is utilized, it can enter the quench tower for cooling, and the thermal desorption exhaust gas treatment module can harmlessly treat the gas discharged from the quench tower.

[0048] When the temperature of the raw materials in the raw material bin is insufficient or the humidity is relatively high, the third passage of the secondary combustion exhaust gas and the air inlet for the secondary combustion exhaust gas can be connected to allow the secondary combustion exhaust gas to enter the raw material bin along the third passage of the secondary combustion exhaust gas to preheat the raw materials. The heated hot air then enters the quench tower from the top of the raw material bin through a pipeline.

[0049] In the embodiment of the present invention, through the switching pipeline of the secondary combustion exhaust gas, by using the regulating valve, the first passage, the second passage, and the third passage of the secondary combustion exhaust gas, the recycling and secondary combustion of the secondary combustion exhaust gas are realized. Combined with the utilization of the waste heat of the secondary combustion in thermal desorption, the energy-saving effect is achieved.

[0050] Optionally, the intelligent energy-saving carbonization device further includes a first exhaust gas recovery pipeline, and the first exhaust gas recovery pipeline is respectively connected to the raw material bin and the rotary kiln.

[0051] Among them, the high-temperature exhaust gas after combustion in the rotary kiln can enter the raw material bin through the first exhaust gas recovery pipeline to preheat and dry the raw materials in the raw material bin.

[0052] Particularly, the intelligent energy-saving carbonization device further includes a second exhaust gas recovery pipeline, and the second exhaust gas recovery pipeline is respectively connected to the first valve and the rotary kiln.

[0053] Among them, the high-temperature tail gas after combustion in the rotary kiln can enter the adjustment bin again through the second tail gas recovery pipeline. When the combustion in the rotary kiln is still insufficient, it can be introduced into the rotary kiln again through the second tail gas recovery pipeline for combustion, so that the entire intelligent energy-saving carbonization device does not need to be externally connected to other thermal desorption rotary kilns, and only by using the rotary kiln structure of the present application, multiple combustions can be carried out. For example, natural gas and air are introduced into the rotary kiln from the adjustment bin, and a primary combustion is carried out in the rotary kiln. The tail gas after combustion can be introduced into the raw material bin through the first tail gas recovery pipeline to preheat and dry the raw materials. After the raw materials reach the combustion conditions, they can be added to the rotary kiln. After that, the tail gas formed after the combustion in the rotary kiln can flow into the first path of the secondary combustion tail gas through the second tail gas recovery pipeline, and then enter the rotary kiln for secondary combustion, improving the utilization efficiency of the tail gas.

[0054] Specifically, a temperature sensor is provided at the tail gas outlet of the rotary kiln in the embodiment of the present invention to collect temperature sensor data, so as to reuse the tail gas of the rotary kiln.

[0055] Specifically, (1) if the temperature is higher than 300 °C, it can be reused in the rotary kiln through the second tail gas recovery pipeline; (2) if the temperature is between 100-300 °C, it can be introduced into the raw material bin for drying through the first tail gas recovery pipeline; (3) if the temperature is relatively low, lower than 100 °C, it can be introduced into the quench tower according to the composition of the tail gas (the fuel in the tail gas has reached the emission conditions), or introduced into the adjustment bin to adjust the temperature of the gas entering the kiln, and then enter the rotary kiln again for secondary heating.

[0056] Optionally, the first path of the secondary combustion tail gas, the second path of the secondary combustion tail gas, the third path of the secondary combustion tail gas, the first tail gas recovery pipeline, and the second tail gas recovery pipeline are all provided with a double-layer jacket heat preservation structure.

[0057] By adopting the double-layer jacket heat preservation structure in the embodiment of the present invention, the heat preservation effect of each path and pipeline can be effectively improved, the heat loss during the working process can be reduced, and the heat utilization rate can be improved.

[0058] Optionally, a one-way valve is provided at the tail gas outlet of the thermal rotary kiln to prevent the gas from flowing back into the kiln and interfering with the thermal desorption process of the polluted soil in the rotary kiln.

[0059] Among them, the one-way valve is also a three-way valve, which can make the tail gas of the rotary kiln flow into the quench tower or the first tail gas recovery pipeline and the second tail gas recovery pipeline.

[0060] Specifically, the one-way valve, the first valve, and the second valve are all equipped with a flow distribution device, which can intelligently distribute the secondary combustion tail gas in the three paths according to the temperature situation.

[0061] Optionally, a temperature sensor and a pressure sensor are also provided in the rotary kiln.

[0062] Among them, temperature sensors and air pressure sensors are provided at both ends of the rotary kiln, which can effectively analyze the gas conditions of the gas entering and leaving the rotary kiln.

[0063] In the embodiment of the present invention, by setting temperature sensors and air pressure sensors, effective monitoring of the gas conditions in the rotary kiln is realized, and the monitoring effect is improved.

[0064] Optionally, a discharge bin is further provided at one end of the rotary kiln close to the quench tower.

[0065] Among them, a discharge bin is provided at the lower part of one end of the rotary kiln close to the quench tower, and the carbonized product can be discharged through the discharge bin.

[0066] Optionally, a high-temperature resistant filter screen is further provided at one end of the adjustment bin close to the second passage of the secondary combustion tail gas.

[0067] Among them, a high-temperature resistant filter screen is arranged in the adjustment bin, which can filter the particles in the gas to avoid solid particles from mixing into the rotary kiln. For the secondary combustion tail gas, the particles in the tail gas can be effectively reduced, and the subsequent treatment pressure of the tail gas particles can be slowed down.

[0068] Particularly, a cleaning bin is further provided at one end of the adjustment bin close to the rotary kiln.

[0069] Among them, the cleaning bin is arranged at the lower part of one end of the adjustment bin close to the rotary kiln, and can be controlled by the staff to clean the dirt in the adjustment bin through the cleaning bin.

[0070] Optionally, the intelligent energy-saving carbonization device further includes a nitrogen gas bin, and the nitrogen gas bin is connected to one end of the adjustment bin close to the second passage of the secondary combustion tail gas.

[0071] Among them, the nitrogen gas bin is connected to one end of the adjustment bin close to the second passage of the secondary combustion tail gas, and nitrogen gas can be used as a carrier gas to reduce the oxygen content in the thermal desorption tail gas to meet the carbonization conditions.

[0072] Optionally, the thermal desorption equipment module is a dry acid removal and activated carbon injection device.

[0073] Among them, the thermal desorption equipment module is a dry acid removal and activated carbon injection device, which can perform thermal desorption treatment on the tail gas to realize tail gas treatment.

[0074] The embodiment of the present invention also discloses an intelligent control system of the above-mentioned intelligent energy-saving carbonization device, including:

[0075] An intelligent parameter recommendation module, which is used to obtain the raw material type and recommend carbonization parameters based on the raw material type;

[0076] Among them, the staff can input the information of the raw material type into the intelligent parameter recommendation module, and the intelligent parameter recommendation module conducts relevant analysis to obtain the recommended carbonization parameters;

[0077] An operation control module, which is used to control the intelligent energy-saving carbonization device to carry out the carbonization process based on specific carbonization parameters;

[0078] Among them, the operation control module controls the intelligent energy-saving carbonization device to carry out carbonization based on the recommended carbonization parameters or the specific carbonization parameters adjusted by the staff;

[0079] A real-time monitoring module, which is used to monitor the specific working conditions of the intelligent energy-saving carbonization device during the carbonization process.

[0080] Among them, the real-time monitoring module can effectively monitor the carbonization process in the rotary kiln based on the temperature sensor and air pressure sensor of the rotary kiln.

[0081] During the actual carbonization process, as Figure 2 shown, first, the intelligent parameter recommendation module obtains the carbonization parameters based on the raw material type; the operation control module conducts the carbonization process based on the carbonization parameters, and the real-time monitoring module conducts real-time monitoring. During the carbonization process, the operation control module makes fine adjustments to the intelligent energy-saving carbonization device to ensure the stable temperature in the rotary kiln.

[0082] Optionally, the operation process of the intelligent control system includes:

[0083] S101: Obtain the raw material matrix information;

[0084] Among them, in particular, the raw material matrix information includes at least one of matrix type, matrix property, usage target, and object medium. The staff can input relevant information such as matrix type, matrix property, usage target, object medium, and planned production quantity into the intelligent parameter recommendation module according to the actual situation. For specific content, please refer to Table 1 below.

[0085] Table 1 Input parameters such as biochar matrix and usage target according to actual requirements

[0086]

[0087] The staff can input the matrix information in the above table form.

[0088] S102: Based on the raw material matrix information, extract keywords, and obtain the processing parameters and sources that match the keywords, and use the processing parameters as the recommended carbonization parameters;

[0089] Among them, the intelligent parameter recommendation module can synthesize the above-mentioned matrix information, extract it into several keywords to form a keyword combination, and retrieve it in relevant databases such as Chinese and English libraries and patent retrieval groups (or a relevant parameter database can be set by itself for the intelligent parameter recommendation module to perform relevant retrievals), obtain the recommended operating parameters and applicable parameters for producing biochar, list the references, and the specific output recommended parameters are shown in Table 2 below.

[0090] Table 2 Suggestions for output parameters

[0091]

[0092] S103: Provide the recommended carbonization parameters to the staff, and confirm the operating parameters based on the staff's selection;

[0093] Among them, after obtaining the recommended carbonization parameters, the staff can directly select the recommended carbonization parameters as the operating parameters, or the staff can customize the operating parameters, or call the historical carbonization parameters and perform the carbonization process based on the obtained historical carbonization parameters.

[0094] S104: Control the regulating valve so that the secondary combustion tail gas can enter the regulation chamber through the second secondary combustion tail gas passage; control the regulation chamber and the rotary kiln to work based on the operating parameters;

[0095] Among them, the operation control module takes the operating parameters as the standard, sets the initial operating parameters, and obtains the temperature and air pressure parameters in real time through the sensors at the inlet and outlet of the rotary kiln during the operation process, and feeds them back to the regulation chamber control module to fine-tune the parameters in time for the carbonization process;

[0096] S105: Obtain the temperature parameters and air pressure parameters at the inlet and outlet of the rotary kiln, control and regulate the regulation chamber, and save the regulation process as process parameters;

[0097] Among them, the real-time monitoring module obtains the temperature and air pressure parameters through the sensors at the inlet and outlet of the rotary kiln and feeds them back to the operation control module to perform fine-tuning of the corresponding parameters to ensure that the carbonization process remains under appropriate conditions.

[0098] S106: Run until the firing is completed and discharge the material;

[0099] S107: Start the next batch of firing, repeat S101 - S106 until all batches are completed, switch to connect the secondary combustion tail gas to the first secondary combustion tail gas passage, and perform post-treatment through the quench tower.

[0100] Among them, after the previous batch of materials is discharged, if the firing of the next batch is required, the valve is opened and the raw materials and auxiliary materials of the matrix are put in, and the initial and real-time adjusted operating parameters are called to complete the firing of this batch. If the current production is ended, the first passage of the secondary combustion tail gas is switched by adjusting the valve, so that the secondary combustion tail gas directly enters the quench tower and the thermal desorption equipment module through the first passage of the secondary combustion tail gas for tail gas treatment.

[0101] Optionally, as Figure 5 shown, the carbonization process after calling the initial operating parameters specifically includes:

[0102] S201. Call the initial operating parameters to determine whether the moisture content of the materials in the raw material bin meets the requirements. If not, switch the third passage of the secondary combustion tail gas and introduce air to dry and preheat the materials in the raw material bin;

[0103] Among them, temperature and humidity sensors are set in the raw material bin, which are connected to the real-time monitoring module to control whether to partially open the third passage of the secondary combustion tail gas and introduce air to realize the drying and preheating of the raw materials; at the same time, the raw materials can also be directly dried by introducing air through the third passage of the secondary combustion tail gas, and the carbonization program is started when carbonization is required; specifically, the temperature of the gas introduced into the raw material bin needs to be controlled at 100-300 °C;

[0104] S202. If the moisture content of the materials in the raw material bin meets the requirements, switch the second passage of the secondary combustion tail gas so that the tail gas enters the rotary kiln through the regulating bin;

[0105] S203. Determine whether real-time parameter adjustment is required during operation. If no adjustment is required, continue until the end of this batch of operation; if adjustment is required, call the real-time adjusted parameters according to the actual adjustment requirements until the end of this batch of operation;

[0106] S204. Determine whether to produce the next batch. If the next batch is to be produced continuously, repeat steps S201-S203; if production is not continued, switch the first passage of the secondary combustion tail gas.

[0107] Among them, it should be noted that if the temperature or air pressure in the secondary combustion tail gas switching pipeline, rotary kiln, and raw material bin is too high, the tail gas is urgently depressurized to the first passage of the secondary combustion tail gas.

[0108] The embodiment of the present invention realizes the intelligent and energy-saving continuous production of biochar by setting an intelligent energy-saving carbonization device and a remote control system based on the waste heat of secondary combustion of thermal desorption, specifically including:

[0109] 1. The high-temperature waste heat of secondary combustion is directly used for the continuous production of biochar, efficiently utilizing heat energy and reducing the overall energy consumption and carbon emissions;

[0110] 2 Eliminate the long-distance transportation of garden waste, and realize the resource treatment of garden waste in and around the polluted treatment plot nearby, further saving social resources, energy consumption and carbon emissions;

[0111] 3 Use the remote control system to intelligently screen the applicable biochar preparation parameters and improve the biochar preparation efficiency;

[0112] 4 The equipment module does not require a power device or a fire prevention device, and the combustion exhaust gas can be directly harmlessly treated by relying on the thermal desorption equipment. The equipment is simple, and the installation and disassembly are convenient;

[0113] 5 In addition to garden waste, it can also be extended to treat pressure-filtered domestic wastewater sludge, agricultural waste (peanut shells, fruit peels, straw (rice, corn, hemp), coffee grounds), livestock and poultry waste (cow dung, sheep dung, chicken dung, pig dung), etc.

[0114] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them. Although the present invention has been described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that after reading the specification of this application, the technical personnel can still modify the specific implementation manners of the present invention or make equivalent replacements, but these modifications or changes are all within the protection scope of the pending claims of this invention application.

Claims

1. An intelligent energy-saving carbonization device based on the waste heat of secondary combustion by thermal desorption, characterized in that, Including: A rotary kiln for heating and carbonizing raw materials; A regulating bin for controlling the gas entering the rotary kiln, including gas type and ventilation volume; A raw material bin and an auxiliary material bin, with one end of the rotary kiln close to the regulating bin connected to the raw material bin and the auxiliary material bin; A quenching tower for connecting to the gas outlet of the rotary kiln and cooling the gas; A thermal desorption tail gas treatment module for harmless treatment of the gas discharged from the quenching tower; A secondary combustion tail gas switching pipeline, which includes a regulating valve, a first secondary combustion tail gas passage, a second secondary combustion tail gas passage, and a third secondary combustion tail gas passage. The first secondary combustion tail gas passage is connected to the second secondary combustion tail gas passage through the regulating valve. The first secondary combustion tail gas passage is also connected to the quenching tower. The second secondary combustion tail gas passage is connected to the air inlet of the regulating bin. The third secondary combustion tail gas passage is connected to the raw material bin for drying and preheating the raw materials, improving the carbonization efficiency of the rotary kiln and the waste heat utilization efficiency.

2. The intelligent energy-saving carbonization device according to claim 1, wherein The intelligent energy-saving carbonization device further includes a first tail gas recovery pipeline, which is respectively connected to the raw material bin and the rotary kiln.

3. The intelligent energy-saving carbonization device according to claim 1, characterized in that Temperature sensors and air pressure sensors are provided in both the regulating bin and the rotary kiln. An outlet bin is also provided at one end of the rotary kiln close to the quenching tower.

4. The intelligent energy-saving carbonization device according to claim 1, wherein A high-temperature resistant filter screen is provided at one end of the regulating bin close to the second secondary combustion tail gas passage, and a cleaning bin is also provided at one end of the regulating bin close to the rotary kiln.

5. The intelligent energy-saving carbonization device according to claim 4, wherein, The intelligent energy-saving carbonization device further includes a nitrogen bin, which is connected to one end of the regulating bin close to the second secondary combustion tail gas passage.

6. The intelligent energy-saving carbonization device according to claim 2, wherein, Double-layer jacket heat insulation structures are provided in the first secondary combustion tail gas passage, the second secondary combustion tail gas passage, the third secondary combustion tail gas passage, and the tail gas recovery pipeline.

7. The intelligent energy-saving carbonization device according to claim 1, wherein The thermal desorption tail gas treatment module is a dry acid removal and activated carbon injection device.

8. The intelligent energy-saving carbonization device according to claim 1, characterized in that, A one-way valve is provided at the tail gas outlet of the thermal rotary kiln to prevent gas from flowing back into the kiln and interfering with the thermal desorption process of contaminated soil in the rotary kiln.

9. The intelligent control system of the intelligent energy-saving carbonization device according to any one of claims 1-8, characterized in that, The intelligent control system includes: An intelligent parameter recommendation module for obtaining the raw material type and recommending carbonization parameters based on the raw material type; An operation control module for controlling the intelligent energy-saving carbonization device to carry out the carbonization process based on specific carbonization parameters; A real-time monitoring module for monitoring the specific working conditions of the intelligent energy-saving carbonization device during the carbonization process.

10. The intelligent control system according to claim 9, characterized in that, The operation process of the intelligent control system includes: S101: Obtain raw material matrix information; S102: Based on the raw material matrix information, extract keywords and obtain the processing parameters and sources matching the keywords, and use these processing parameters as the recommended carbonization parameters; S103: Provide the recommended carbonization parameters to the staff, and confirm the operation parameters based on the staff's selection; S104: Control the regulating valve to enable the secondary combustion tail gas to enter the regulating bin through the second secondary combustion tail gas passage; control the regulating bin and the rotary kiln to work based on the operation parameters; S105: Obtain the temperature parameters and air pressure parameters at the air inlet and outlet of the rotary kiln, control and adjust the regulating bin, and save the adjustment process as process parameters. S106: Run until firing is completed and discharge the material; S107: Start firing the next batch, and repeat S101 - S106 until all batches are completed. Then switch to connect the secondary combustion tail gas to the first path of the secondary combustion tail gas, and conduct post-treatment through the quench tower.

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