A vertical low-temperature double-circulation upflow carbonization equipment and a method for treating sludge

Abstract

The present invention discloses a vertical low-temperature double-circulation upflow carbonization equipment and a method for sludge treatment. The sludge carbonization furnace includes a vertical kiln transmission circulation lifting furnace system, a spraying temperature control system and a feeding, discharging and exhaust system. Combined with the structural advantages of the vertical furnace body, it gives full play to the direct heating and co-combustion of the doped biomass, and efficiently converts the sludge into biochar resources under the premise of low waste gas emissions. The present invention is based on the principle of anaerobic carbonization, and has the following characteristics: the vertical structure greatly reduces the failure rate of the carbonization furnace, and the internal efficient heat cycle increases the thermal efficiency of carbonization by multiples; the circulation lifting makes the particles fully heated, and the sludge is more fully carbonized; the direct spraying heating method avoids the heat loss of indirect heating; the co-combustion of biomass and sludge fully increases the biochar yield, increases the calorific value of the sludge biochar, and forms a porous structure through the carbonization of biomass to adsorb the dust and harmful gases formed by the sintering, and reduces the waste gas emission by multiples.

Description

Technical Field

[0001] The invention relates to a vertical kiln sludge carbonization furnace, in particular to a vertical low-temperature double-circulation upflow carbonization device and a sludge treatment method. Background Art

[0002] Sludge has always been an extremely important source of heavy metal and toxic organic water pollution. It is rich in a large number of polycyclic aromatic hydrocarbons, heterocyclic compounds, organic pesticides and heavy metals, which are "three-hazard" (carcinogenic, teratogenic and mutagenic) pollutants. Improper treatment will cause serious ecological problems and even human health risk events. Sludge has always been treated as solid hazardous waste due to its high pollutant content and difficulty in separating sludge from sewage. Not only is the treatment cost high, but landfill and other treatment methods will also pose potential risks to the future ecological environment.

[0003] Oxygen-free carbonization of sludge has been widely recognized and promoted in the environmental protection industry due to its technical advantages such as heavy metal pollution fixation, organic pollutant reduction and waste resource utilization. In addition, the sludge biochar obtained after anaerobic carbonization can be used as a building material as an environmentally friendly material, which not only reduces the pressure on the ecological environment in terms of the difficulty in handling sludge accumulation, but also alleviates the waste of land resources formed in the process of making building materials, killing two birds with one stone.

[0004] However, the low efficiency, high failure rate and waste gas generation of sludge carbonization equipment during the anaerobic carbonization treatment of sludge have always been the pain points of sludge carbonization. China Patent (Patent No.: CN111704337A) A carbonization and pyrolysis device for industrial sludge treatment is a rotary kiln drum sludge carbonization device that achieves the purpose of sludge carbonization by indirectly heating the furnace wall. However, in fact, indirect heating will lead to heat loss and insufficient utilization. In addition, the rotary kiln drum sludge carbonization has a high failure rate, is difficult to operate stably at high temperatures, and often has problems such as odor leakage. China Utility Model Patent (Application Publication No.: CN210287221U) Carbonization furnace for harmless treatment of sludge, as a rotary kiln carbonization furnace, is similar to the above patents and is also plagued by incomplete heat utilization, high failure rate and odor problems. Although most sludge anaerobic carbonization devices have improved their carbonization efficiency through various means, none of them are simple and practical.

[0005] Developing a sludge anaerobic carbonization device with simple structure, wide application, low cost, easy disassembly and assembly, low maintenance difficulty and clean energy is a primary problem that needs to be solved urgently. The present invention is based on the principle of anaerobic carbonization and has the following characteristics: the vertical structure greatly reduces the failure rate of the carbonization furnace, and the internal high-efficiency heat cycle doubles the thermal efficiency of carbonization; the circulation lifting makes the particles fully heated and the sludge carbonization more complete; the direct spray heating method avoids the heat loss of indirect heating; the co-combustion of biomass and sludge fully improves the biochar yield and the calorific value of sludge biochar, and the porous structure formed by biomass carbonization absorbs the dust and harmful gases formed by the sintering, which doubles the exhaust gas emission. Summary of the invention

[0006] The main purpose of the present invention is to provide a vertical kiln sludge carbonization furnace, and the secondary purpose is to provide a method for using a vertical low-temperature double-circulation upflow carbonization device for sludge treatment.

[0007] The technical solution of the present invention is as follows.

[0008] A vertical low-temperature double-circulation upflow carbonization equipment, comprising a vertical kiln transmission circulation lifting furnace body system, a spraying temperature control system and a charging, discharging and exhausting system; the top and bottom of the vertical kiln transmission circulation lifting furnace body system are connected to the charging, discharging and exhausting system, and the spraying temperature control system is connected to the vertical kiln transmission circulation lifting furnace body system;

[0009] The vertical kiln transmission circulation lifting furnace body system includes a transmission shaft, a high temperature resistant crawler, an electric motor, a circulation lifting bowl-shaped fan blade, a vertical kiln barrel furnace chamber and a mixed gas interface; the high temperature resistant crawler is driven by the transmission shaft, and the transmission shaft is driven by the electric motor; a circulation lifting bowl-shaped fan blade is fixed on the high temperature resistant crawler; the high temperature resistant crawler is located inside the vertical kiln barrel furnace chamber; a mixed gas interface is opened on the vertical kiln barrel furnace chamber.

[0010] Furthermore, the spraying temperature control system includes a temperature measuring electronic spraying integrated device, a data transmission line and a temperature control central system; the temperature measuring electronic spraying integrated device is arranged on the mixed gas interface, and the temperature measuring electronic spraying integrated device is connected to the temperature control central system through a data transmission line.

[0011] Furthermore, the feeding, discharging and exhaust system includes a storage bin and a discharge bin; the storage bin is located above the barrel-type furnace cavity of the vertical kiln, and the discharge bin is located below the barrel-type furnace cavity of the vertical kiln; the storage bin is connected to the barrel-type furnace cavity of the vertical kiln through the feeding port of the furnace body; the discharge bin is connected to the barrel-type furnace cavity of the vertical kiln through the discharge port of the furnace body.

[0012] Furthermore, the present invention further comprises an external discharge port; the external discharge port is communicated with the discharge bin.

[0013] Furthermore, the present invention also includes an external feeding port and an external exhaust port; the external feeding port is arranged above the storage bin; the external exhaust port is arranged above the storage bin.

[0014] Furthermore, the high temperature resistant crawler belt is driven by an electric motor, which in turn drives the circulating lifting bowl-shaped fan blades to disperse and chain-burn the dry sludge and biomass mixture in the barrel furnace chamber of the vertical kiln.

[0015] Furthermore, the spraying temperature control system accurately detects the temperature of different levels through the temperature measuring electronic spraying integrated equipment, transmits the temperature information to the temperature control central system through the data transmission line, and then sprays and heats the furnace cavity through the temperature measuring electronic spraying integrated equipment to maintain the furnace cavity temperature of each level at 350~600℃.

[0016] Furthermore, the power used by the electric motor is 5.5~7.5kW.

[0017] A method for using a vertical low-temperature double-circulation upflow carbonization equipment, wherein a mixture of dry sludge and biomass enters a storage bin through an external feeding port, and then enters a vertical kiln transmission circulation lifting furnace system through a furnace body feeding port, undergoes 1 to 1.5 hours of oxygen-free carbonization treatment, and then enters a discharge bin through a furnace body discharge port, and is finally discharged through an external discharge port.

[0018] In the above method, after receiving the temperature increase command from the temperature control central system, the temperature measurement electronic spraying integrated equipment inputs the mixed gas of natural gas and air into the barrel furnace chamber of the vertical kiln in a ratio of 1:5~7.5, and simultaneously ignites the mixed gas by electronic ignition to achieve the purpose of spraying and heating.

[0019] In the above method, the mass of the dry sludge and biomass mixture added to the interlayer between each high-temperature resistant crawler and the circulating lifting bowl-shaped fan blade through the furnace body feeding port each time is 10-15 kg.

[0020] In the above method, during the operation of the vertical kiln transmission circulation lifting furnace system and the spray burning temperature control system, the external feeding port, the furnace body discharge port and the external discharge port are all sealed to ensure an oxygen-free environment in the vertical kiln barrel furnace chamber.

[0021] The above carbonization furnace assembly method is to assemble the various parts separately first, and assemble them from bottom to top.

[0022] A method for using a vertical low-temperature double-circulation upflow carbonization device comprises the following steps: turning on the power supply, the power of the motor is 5.5-7.5 kW, a mixture of natural gas and air is input into a barrel furnace chamber of a vertical kiln at a ratio of 1:5-7.5, the furnace chamber is heated by spraying through a temperature measuring electronic spraying integrated device, and the temperature of each layer of the furnace chamber is maintained at 350-600°C; a mixture of dried sludge and biomass enters a storage bin through an external feeding port, and then enters a transmission circulation lifting furnace system of the vertical kiln through a furnace body feeding port, 10-15 kg of the mixture of dried sludge and biomass is added through the furnace body feeding port to each high-temperature resistant crawler and circulation lifting bowl-shaped fan blade The interlayer is arranged between them; the high temperature resistant crawler and the circulating lifting bowl-shaped fan blades are driven by the motor to disperse and chain-burn the dry sludge and biomass mixture in the barrel furnace chamber of the vertical kiln; the burning temperature control system accurately detects the temperature of different layers through the temperature measurement electronic burning integrated equipment, injects and ignites the mixed gas at the right time, and burns and heats the furnace chamber; 1 to 1.5 hours of oxygen-free carbonization treatment is carried out, and during the working process of the vertical kiln transmission circulating lifting furnace system and the burning temperature control system, the external feeding port, the furnace body discharge port and the external discharge port are all closed to ensure the oxygen-free environment in the barrel furnace chamber of the vertical kiln; then the material enters the discharge bin through the furnace body discharge port and is finally discharged from the external discharge port.

[0023] The present invention is designed based on the principle of anaerobic carbonization, and has the following characteristics: 1. The vertical structure greatly reduces the failure rate of the carbonization furnace, and the internal high-efficiency heat cycle increases the thermal efficiency of carbonization by several times; 2. The circulation lifting makes the particles fully heated, and the sludge is carbonized more fully; 3. The direct spray heating method avoids the heat loss of indirect heating; 4. The co-combustion of biomass and sludge fully increases the biochar yield and the calorific value of sludge biochar, and the porous structure formed by biomass carbonization absorbs the dust and harmful gases formed by the sintering, thereby reducing the exhaust gas emission by several times.

[0024] Compared with the prior art, the advantages of the present invention are:

[0025] The vertical structure greatly reduces the failure rate of the carbonization furnace, and the internal efficient heat cycle increases the thermal efficiency of carbonization by several times; the circulation promotion makes the particles fully heated and the sludge carbonization more complete; the direct spray heating method avoids the heat loss of indirect heating; the co-combustion of biomass and sludge fully increases the biochar yield and the calorific value of sludge biochar, and the porous structure formed by biomass carbonization absorbs the dust and harmful gases formed by the sintering, which reduces the exhaust gas emission by several times. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the appearance structure of the vertical kiln high-efficiency biomass co-firing circulating lifting type sludge carbonization furnace of the present invention;

[0027] Figure 2It is a schematic diagram of the longitudinal section structure of the vertical kiln high-efficiency biomass co-combustion circulating lifting type sludge carbonization furnace of the present invention;

[0028] Figure 3 It is a cross-sectional structural schematic diagram of a vertical kiln high-efficiency biomass co-combustion circulating lifting type sludge carbonization furnace of the present invention;

[0029] Figure 4 This is a high-magnification electron microscope photo of the biochar in Example 1;

[0030] Figure 5 This is a high-magnification electron microscope photo of the biochar in Example 2;

[0031] Figure 6 This is a high-magnification electron microscope photo of the biochar in Example 3;

[0032] Figure 7 This is a high-magnification electron microscope photo of the biochar in Example 4.

[0033] The components in the figure are as follows: vertical kiln transmission circulation lifting furnace system 1, spraying temperature control system 2, feeding, discharging and exhaust system 3, transmission shaft 4, high temperature resistant crawler 5, motor 6, circulation lifting bowl-shaped fan blade 7, vertical kiln barrel furnace chamber 8 and mixed gas interface 9, temperature measurement electronic spraying integrated equipment 10, data transmission line 11, temperature control central system 12, external feeding port 13, external exhaust port 14, storage bin 15, furnace body feeding port 16, furnace body discharge port 17, discharge bin 18 and external discharge port 19. DETAILED DESCRIPTION

[0034] The present invention will be further described in detail below in conjunction with specific embodiments, but the embodiments of the present invention are not limited thereto. For process parameters not particularly noted, conventional techniques may be used.

[0035] like Figure 1~Figure 3As shown, a vertical low-temperature double-circulation upflow carbonization equipment includes a vertical kiln transmission circulation lifting furnace body system 1, a spraying temperature control system 2 and a charging, discharging and exhaust system 3; the vertical kiln transmission circulation lifting furnace body system 1 includes a transmission shaft 4, a high-temperature resistant crawler 5, a motor 6, a circulation lifting bowl-shaped fan blade 7, a vertical kiln barrel furnace chamber 8 and a mixed gas interface 9 from the inside to the outside; the vertical kiln transmission circulation lifting furnace body system 1 includes a transmission shaft 4, a high-temperature resistant crawler 5, a motor 6, a circulation lifting bowl-shaped fan blade 7, a vertical kiln barrel furnace chamber 8 and a mixed gas interface 9; the high-temperature resistant crawler 5 is driven by the transmission shaft 4, and the transmission shaft 4 is driven by the motor 6; the circulation lifting bowl-shaped fan blade 7 is fixed on the high-temperature resistant crawler 5; the high-temperature resistant crawler 5 is located inside the vertical kiln barrel furnace chamber 8; the vertical kiln barrel furnace chamber 8 is provided with a mixed gas interface 9. The spraying temperature control system 2 includes a temperature measurement electronic spraying integrated device 10, a data transmission line 11 and a temperature control central system 12; the temperature measurement electronic spraying integrated device 10 is arranged on the mixed gas interface 9, and the temperature measurement electronic spraying integrated device 10 is connected to the temperature control central system 12 through the data transmission line 11. The feeding, discharging and exhausting system 3 includes a storage bin 15 and a discharge bin 18; the storage bin 15 is located above the vertical kiln barrel furnace chamber 8, and the discharge bin 18 is located below the vertical kiln barrel furnace chamber 8; the storage bin 15 is connected to the vertical kiln barrel furnace chamber 8 through the furnace body feeding port 16; the discharge bin 18 is connected to the vertical kiln barrel furnace chamber 8 through the furnace body discharge port 17. This embodiment also includes an external discharge port 19; the external discharge port 19 is connected to the discharge bin 18. This embodiment also includes an external feeding port 13 and an external exhaust port 14; the external feeding port 13 is arranged above the storage bin 15; the external exhaust port 14 is arranged above the storage bin 15.

[0036] In this embodiment, the power of the motor 6 is 7.5 kW, the mixed gas of natural gas and air is input into the barrel furnace chamber 8 of the vertical kiln at a ratio of 1:7.5, and the mass of the dry sludge and biomass mixture added to each layer between the high temperature resistant crawler 5 and the circulating lifting bowl-shaped fan blade 7 through the furnace body feeding port 16 each time is 15 kg, and the furnace chamber temperature of each layer is 600°C;

[0037] Among them, the circulating lifting bowl-shaped fan blade 7 is supported and stably fixed on the high-temperature resistant crawler 5; the high-temperature resistant crawler 5 is driven by the motor 6, and then the circulating lifting bowl-shaped fan blade 7 is driven to disperse and chain-spray the dry sludge and biomass mixture in the barrel furnace chamber 8 of the vertical kiln; the spraying temperature control system 2 accurately detects the temperature of different levels through the temperature measuring electronic spraying integrated equipment 10, and transmits the temperature information to the temperature control central system 12 through the data transmission line 11, and then the furnace chamber is heated by spraying through the temperature measuring electronic spraying integrated equipment 10; the dry sludge and biomass mixture enters the storage bin 15 through the external feeding port 13, Then, it enters the vertical kiln transmission circulation lifting furnace system 1 through the furnace body feeding port 16, undergoes 1-1.5 hours of oxygen-free carbonization treatment, and then enters the discharge bin 18 through the furnace body discharge port 17, and is finally discharged from the external discharge port 19; after receiving the temperature increase instruction from the temperature control central system 12, the temperature measurement electronic spraying integrated equipment 10 simultaneously electronically ignites the mixed gas to achieve the purpose of spraying and heating; during the operation of the vertical kiln transmission circulation lifting furnace system 1 and the spraying temperature control system 2, the external feeding port 13, the furnace body discharge port 17 and the external discharge port 19 are all sealed to ensure an oxygen-free environment in the vertical kiln barrel furnace chamber 8;

[0038] Example 1

[0039] One ton of sludge from an industrial wastewater treatment plant collected by an organization was mixed with dry wood chips to a total weight of 1.2 tons. The moisture content was reduced to about 30% through drying and other methods.

[0040] Turn on the power, the power of the motor is 7.5kW, the mixed gas of natural gas and air is input into the barrel furnace chamber of the vertical kiln at a ratio of 1:7.5, and the furnace chamber is heated by spraying through the temperature measuring electronic spraying integrated equipment to maintain the temperature of each level of the furnace chamber at 600℃; the dry sludge and biomass mixture enters the storage bin through the external feeding port, and then enters the vertical kiln transmission circulation lifting furnace system through the furnace body feeding port, 15 kg of dry sludge and biomass mixture is added to the interlayer between each high-temperature resistant crawler and the circulating lifting bowl-shaped fan blade through the furnace body feeding port; the high-temperature resistant crawler and the circulating lifting bowl-shaped fan blade are driven by the motor to heat the dry sludge and biomass mixture in the barrel furnace chamber of the vertical kiln. The mixture of dry sludge and biomass is dispersed and chain-sprayed; the spraying temperature control system accurately detects the temperature of different layers through the temperature measuring electronic spraying integrated equipment, injects and ignites the mixed gas at the right time, and sprays and heats the furnace cavity; 1 hour of oxygen-free carbonization treatment is carried out, and during the operation of the vertical kiln transmission circulation lifting furnace system and the spraying temperature control system, the external feeding port, the furnace body discharge port and the external discharge port are all closed to ensure the oxygen-free environment in the vertical kiln barrel furnace cavity; then it enters the discharge bin through the furnace body discharge port and is finally discharged from the external discharge port.

[0041] Figure 4This is a high-magnification electron microscope photo of the vertical kiln high-efficiency biomass co-sintering circulating lifting sludge carbonization furnace of the present invention, which forms sludge biochar by anaerobic carbonization of a mixture of dry sludge and biomass. It can be seen that a relatively dense porous structure is formed on the surface of the sludge biochar, which is more suitable for adsorption. A rounded coating structure is formed at the microscopic level, which will fix the pollutants more firmly.

[0042] Example 2

[0043] One ton of printing and dyeing sludge collected by an organization was mixed with dry waste wood chips to a total weight of 1.15 tons. The moisture content was reduced to about 35% through drying and other methods.

[0044] Turn on the power, the power of the motor is 7.5kW, the mixed gas of natural gas and air is input into the barrel furnace chamber of the vertical kiln at a ratio of 1:7.5, and the furnace chamber is heated by spraying through the temperature measuring electronic spraying integrated equipment to maintain the temperature of each level of the furnace chamber at 600℃; the dry sludge and biomass mixture enters the storage bin through the external feeding port, and then enters the vertical kiln transmission circulation lifting furnace system through the furnace body feeding port, 15 kg of dry sludge and biomass mixture is added to the interlayer between each high-temperature resistant crawler and the circulating lifting bowl-shaped fan blade through the furnace body feeding port; the high-temperature resistant crawler and the circulating lifting bowl-shaped fan blade are driven by the motor to heat the dry sludge and biomass mixture in the barrel furnace chamber of the vertical kiln. The mixture of dry sludge and biomass is dispersed and chain-sprayed; the spraying temperature control system accurately detects the temperature of different layers through the temperature measuring electronic spraying integrated equipment, injects and ignites the mixed gas at the right time, and sprays and heats the furnace cavity; 1 hour of oxygen-free carbonization treatment is carried out, and during the operation of the vertical kiln transmission circulation lifting furnace system and the spraying temperature control system, the external feeding port, the furnace body discharge port and the external discharge port are all closed to ensure the oxygen-free environment in the vertical kiln barrel furnace cavity; then it enters the discharge bin through the furnace body discharge port and is finally discharged from the external discharge port.

[0045] Figure 5 This is a high-magnification electron microscope photo of the vertical kiln high-efficiency biomass co-sintering circulation lifting sludge carbonization furnace of the present invention, which forms sludge biochar by anaerobic carbonization of a mixture of printing and dyeing sludge and biomass. It can be seen that a relatively dense porous structure is formed on the surface of the sludge biochar, which is more suitable for adsorption. In addition, a rounded coating structure is formed at the microscopic level, which will fix the pollutants more firmly.

[0046] Example 3

[0047] One ton of papermaking sludge collected by an organization was mixed with dry waste wood chips to a total weight of 1.2 tons. The moisture content was reduced to about 37% through drying and other methods.

[0048] Turn on the power, the power of the motor is 7.5kW, and the mixed gas of natural gas and air is input into the barrel furnace chamber of the vertical kiln at a ratio of 1:7.5. The furnace chamber is heated by spraying through the temperature measuring electronic spraying integrated equipment to keep the temperature of each level of the furnace chamber at 600℃; the dry sludge and biomass mixture enters the storage bin through the external feeding port, and then enters the vertical kiln transmission circulation lifting furnace system through the furnace body feeding port. 15 kg of dry sludge and biomass mixture is added to the interlayer between each high-temperature resistant crawler and the circulating lifting bowl-shaped fan blade through the furnace body feeding port; the high-temperature resistant crawler and the circulating lifting bowl-shaped fan blade are driven by the motor to dry the sludge and biomass mixture in the barrel furnace chamber of the vertical kiln. The sludge and biomass mixture is dispersed and chain-sprayed; the spraying temperature control system accurately detects the temperature of different layers through the temperature measuring electronic spraying integrated equipment, injects and ignites the mixed gas at the right time, and sprays and heats the furnace cavity; 1.5 hours of oxygen-free carbonization treatment is carried out, and during the operation of the vertical kiln transmission circulation lifting furnace system and the spraying temperature control system, the external feeding port, the furnace body discharge port and the external discharge port are all closed to ensure an oxygen-free environment in the vertical kiln barrel furnace cavity; then it enters the discharge bin through the furnace body discharge port and is finally discharged from the external discharge port.

[0049] Figure 6 This is a high-magnification electron microscope photo of the vertical kiln high-efficiency biomass co-combustion circulating lifting sludge carbonization furnace of the present invention, which forms sludge biochar by anaerobic carbonization of papermaking sludge and biomass mixture. It can be seen that a relatively dense porous structure is formed on the surface of the sludge biochar, which is more suitable for adsorption. And a rounded coating structure is formed at the microscopic level, which will fix the pollutants more firmly.

[0050] Example 4

[0051] One ton of tannery sludge collected by a certain organization was mixed with dry waste wood chips to a total weight of 1.07 tons. The moisture content was reduced to about 39% through drying and other methods.

[0052] Turn on the power, the power of the motor is 7.5kW, and the mixed gas of natural gas and air is input into the barrel furnace chamber of the vertical kiln at a ratio of 1:7.5. The furnace chamber is heated by spraying through the temperature measuring electronic spraying integrated equipment to keep the temperature of each level of the furnace chamber at 600℃; the dry sludge and biomass mixture enters the storage bin through the external feeding port, and then enters the vertical kiln transmission circulation lifting furnace system through the furnace body feeding port. 15 kg of dry sludge and biomass mixture is added to the interlayer between each high-temperature resistant crawler and the circulating lifting bowl-shaped fan blade through the furnace body feeding port; the high-temperature resistant crawler and the circulating lifting bowl-shaped fan blade are driven by the motor to dry the sludge and biomass mixture in the barrel furnace chamber of the vertical kiln. The sludge and biomass mixture is dispersed and chain-sprayed; the spraying temperature control system accurately detects the temperature of different layers through the temperature measuring electronic spraying integrated equipment, injects and ignites the mixed gas at the right time, and sprays and heats the furnace cavity; 1.5 hours of oxygen-free carbonization treatment is carried out, and during the operation of the vertical kiln transmission circulation lifting furnace system and the spraying temperature control system, the external feeding port, the furnace body discharge port and the external discharge port are all closed to ensure an oxygen-free environment in the vertical kiln barrel furnace cavity; then it enters the discharge bin through the furnace body discharge port and is finally discharged from the external discharge port.

[0053] Figure 7 This is a high-magnification electron microscope photo of the vertical kiln high-efficiency biomass co-sintering cycle lifting sludge carbonization furnace of the present invention, which forms sludge biochar by oxygen-free carbonization of a mixture of tanning sludge and biomass. It can be seen that a relatively dense porous structure is formed on the surface of the sludge biochar, which is more suitable for adsorption. In addition, a rounded coating structure is formed at the microscopic level, which will fix the pollutants more firmly.

Claims

1. A vertical low-temperature double-circulation upflow carbonization equipment, It is characterized in that The invention comprises a vertical kiln transmission circulation lifting furnace body system (1), a spraying temperature control system (2) and a charging, discharging and exhausting system (3); the top and bottom of the vertical kiln transmission circulation lifting furnace body system (1) are connected to the charging, discharging and exhausting system (3), and the spraying temperature control system (2) is connected to the vertical kiln transmission circulation lifting furnace body system (1); The vertical kiln transmission circulation lifting furnace body system (1) comprises a transmission shaft (4), a high temperature resistant crawler (5), a motor (6), a circulation lifting bowl-shaped fan blade (7), a vertical kiln barrel furnace chamber (8) and a mixed gas interface (9); the high temperature resistant crawler (5) is driven by the transmission shaft (4), and the transmission shaft (4) is driven by the motor (6); the circulation lifting bowl-shaped fan blade (7) is fixed on the high temperature resistant crawler (5); the high temperature resistant crawler (5) is located inside the vertical kiln barrel furnace chamber (8); and the vertical kiln barrel furnace chamber (8) is provided with a mixed gas interface (9); The spraying temperature control system (2) comprises a temperature measuring electronic spraying integrated device (10), a data transmission line (11) and a temperature control central system (12); the temperature measuring electronic spraying integrated device (10) is arranged on the mixed gas interface (9), and the temperature measuring electronic spraying integrated device (10) is connected to the temperature control central system (12) via the data transmission line (11); The material charging, discharging and exhaust system (3) comprises a material storage bin (15) and a material discharge bin (18); the material storage bin (15) is located above the barrel-type furnace chamber (8) of the vertical kiln, and the material discharge bin (18) is located below the barrel-type furnace chamber (8) of the vertical kiln; the material storage bin (15) is connected to the barrel-type furnace chamber (8) of the vertical kiln through a furnace body charging port (16); and the material discharge bin (18) is connected to the barrel-type furnace chamber (8) of the vertical kiln through a furnace body discharge port (17).

2. According to the vertical low-temperature double-circulation upflow carbonization equipment of claim 1, It is characterized in that It also comprises an external discharge port (19); the external discharge port (19) is in communication with the discharge bin (18).

3. According to the vertical low-temperature double-circulation upflow carbonization equipment of claim 1, It is characterized in that It also comprises an external feeding port (13) and an external exhaust port (14); the external feeding port (13) is arranged above the material storage bin (15); and the external exhaust port (14) is arranged above the material storage bin (15).

4. According to the vertical low-temperature double-circulation upflow carbonization equipment of claim 1, It is characterized in that The power used by the electric motor (6) is 5.5-7.5 kW.

5. A method for using the vertical low-temperature double-circulation upflow carbonization equipment according to claim 1, It is characterized in that The dried sludge and biomass mixture enters the storage bin (15) through the external feeding port (13), and then enters the vertical kiln transmission circulation lifting furnace system (1) through the furnace body feeding port (16), undergoes 1 to 1.5 hours of oxygen-free carbonization treatment, and then enters the discharge bin (18) through the furnace body discharge port (17), and is finally discharged through the external discharge port (19).

6. The method of use according to claim 5, It is characterized in that After receiving a temperature increase instruction from the temperature control central system (12), the temperature measurement electronic spraying integrated device (10) inputs a mixture of natural gas and air into the vertical kiln barrel furnace chamber (8) at a ratio of 1:5 to 7.5, and simultaneously ignites the mixture by electronic ignition to achieve the purpose of spraying and heating.

7. The method of use according to claim 5, It is characterized in that Each time, the mass of the dry sludge and biomass mixture added to the interlayer between each high temperature resistant crawler (5) and the circulating lifting bowl-shaped fan blade (7) through the furnace body feeding port (16) is 10 to 15 kilograms.

8. The method of use according to claim 5, It is characterized in that The method comprises the following steps: turning on the power supply, the power of the motor is 5.5-7.5kW, a mixture of natural gas and air is input into the barrel furnace chamber of the vertical kiln at a ratio of 1:5-7.5, the furnace chamber is heated by spraying through the temperature measuring electronic spraying integrated equipment, and the temperature of each layer of the furnace chamber is maintained at 350-600°C; the dried sludge and biomass mixture enters the storage bin through the external feeding port, and then enters the vertical kiln transmission circulation lifting furnace system through the furnace body feeding port, 10-15 kg of the dried sludge and biomass mixture is added to the interlayer between each high-temperature resistant crawler and the circulation lifting bowl-shaped fan blade through the furnace body feeding port; the high-temperature resistant crawler and the circulation lifting bowl-shaped fan blade are driven by the motor to disperse and chain-spray the dried sludge and biomass mixture in the barrel furnace chamber of the vertical kiln; The spraying temperature control system accurately detects the temperature of different layers through the temperature measurement electronic spraying integrated equipment, injects and ignites the mixed gas at the right time, and sprays and heats the furnace cavity; The oxygen-free carbonization treatment is carried out for 1 to 1.5 hours. During the operation of the vertical kiln transmission circulation lifting furnace system and the spraying temperature control system, the external feeding port, the furnace body discharge port and the external discharge port are all closed to ensure an oxygen-free environment in the barrel furnace cavity of the vertical kiln; then the material enters the discharge bin through the furnace body discharge port and is finally discharged from the external discharge port.

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