Sludge cyclone pyrolysis device and method

Abstract

The invention discloses a rotational flow pyrolysis device and method, activated sludge particles are blown into a rotational flow pyrolyzer through carrier gas nitrogen, the rotational flow pyrolyzer is heated through a pyrolyzing furnace, the pyrolyzing temperature is controlled to be 600-1000 DEG C, the pyrolyzing time is 1.5-2 h, the pyrolyzing time is 2-3 h, and the pyrolyzing time is 2-3 h; the gas inlet speed of nitrogen is adjusted, so that the sludge particles can keep suspended motion in the rotational flow pyrolyzer, and self-revolution-suspension recycling coupling pyrolysis of the particles is realized at the same time; after pyrolysis is completed, the flow rate of nitrogen is adjusted, and solid products, pyrolysis gas and tar are subjected to cyclone separation in the cyclone pyrolyzer and then discharged out of the cyclone pyrolyzer to be collected; according to the rotational flow pyrolysis device and method, sufficient and efficient pyrolysis of sludge particles can be achieved, the process energy consumption is low, and sludge activated carbon with high adsorbability and pure pyrolysis gas and tar can be obtained.

Description

Technical Field

[0001] The invention relates to the technical field of sludge resource utilization, and in particular to a sludge cyclone pyrolysis device and method. Background Art

[0002] In recent years, with the rapid improvement of my country's sewage treatment capacity, the amount of sludge has also increased significantly. In 2019, the amount of urban wet sludge produced was close to 50 million tons, nearly twice that of 2010, and the average compound growth rate in the 10 years from 2010 to 2019 reached 7.3%. Sewage treatment is an industry that cannot be ignored in achieving carbon emission control, and the sludge treatment and disposal process is an important link that affects the carbon emissions of the sewage treatment industry.

[0003] The resource utilization of sludge is the key to sludge disposal. At present, the resource utilization of sludge in my country mainly includes sludge land use, building materials and sludge digestion capacity; however, sludge not only contains pathogens and parasites, but also heavy metals such as zinc, copper, mercury and some difficult-to-degrade organic pollutants. If the harmful components in the sludge are not treated accordingly, it will cause great harm to the natural environment and human physical and mental health.

[0004] Sludge pyrolysis technology has attracted much attention due to its advantages of "reduction, harmlessness, and resource utilization". Pyrolysis can significantly reduce the amount of sludge, no dioxin generation, solidify heavy metals, low cost, less pollution, and has a wide range of applications.

[0005] Currently commonly used sludge pyrolysis devices such as fixed bed reactors, plasma reactors, tubular furnaces, etc. often have problems such as large cylinder diameter, difficult sealing, poor pyrolysis effect, low pyrolysis efficiency, high dust content at the pyrolysis gas outlet, and poor quality of pyrolysis products.

[0006] Therefore, how to achieve efficient pyrolysis of sludge and improve the quality of pyrolysis products is the key to achieving "reduction, harmlessness and resource utilization" in sludge treatment and disposal.

[0007] CN205773992U discloses a device for producing biochar by pyrolysis of sludge. The sludge raw material enters a stainless steel pyrolysis furnace through an air intake device and a feeding device, and is pyrolyzed in a nitrogen atmosphere provided by the air intake device. The device has a simple structure and is easy to operate. However, after the sludge raw material enters the pyrolysis furnace, a long pyrolysis time is required and there are problems such as insufficient pyrolysis and poor pyrolysis efficiency.

[0008] CN110066083A discloses a sludge pyrolysis method, which conducts heat to the sludge by adding a heat carrier quartz sand or solid porcelain balls into a pyrolysis reactor, and simultaneously prepares spiral blades and stirring blades to mix the sludge and the heat carrier, thereby achieving sufficient pyrolysis of the sludge and recovering the pyrolysis product; however, the process has increased process costs due to the addition of the heat carrier, and there are problems such as difficulty in separating the subsequent heat carrier from the pyrolysis coke, and the spiral blades and stirring blades in the pyrolysis reactor increase the energy consumption of the equipment and the complexity of operation.

[0009] CN206278920U discloses a rotary pyrolysis system for domestic sludge, which realizes rotary pyrolysis of sludge by installing a tray and a combustion chamber in the pyrolysis furnace, and is equipped with a fluidized bed to activate the activated carbon after pyrolysis. However, the internal structure of the pyrolysis furnace is relatively complex, and it is difficult to achieve deep pyrolysis of sludge particles and to completely remove tar in the activated carbon, resulting in low quality of the activated carbon.

[0010] CN111153576A discloses a rotary oily sludge treatment system and method, which includes a feed screw conveyor, a rotary pyrolysis furnace and a discharge screw conveyor. The rotary pyrolysis furnace includes five parts in the length direction, namely, a feed section, a first transmission section, a pyrolysis section, a second transmission section and a discharge section; a plurality of fixed lifting plates and a plurality of stirring chains are provided in the pyrolysis chamber to stir the sludge, and a pyrolysis furnace is used outside the chamber to heat the sludge. The device pyrolyzes the sludge in the chamber by rotating the pyrolysis furnace. However, the sludge pyrolysis system is cumbersome, the overall structure of the device is complex, and the operation process is complex; in addition, the sludge pyrolysis efficiency of the process is not high due to the limitation of the sludge filling rate of the pyrolysis furnace cylinder (15-20%), and the pyrolysis efficiency is not high due to the closed pyrolysis furnace, which cannot be carried out continuously. Summary of the invention

[0011] In order to solve the defects existing in the existing sludge pyrolysis technology, the present invention provides a sludge cyclone pyrolysis device and method which has high pyrolysis efficiency and can produce high-quality sludge activated carbon as well as pyrolysis gas and tar.

[0012] To achieve the above object, the present invention adopts the following technical solutions:

[0013] The first aspect of the present invention is to provide a sludge cyclone pyrolysis method, comprising the following steps:

[0014] S1. Activated sludge feeding: The activated sludge particles are brought into the cyclone pyrolyzer along the tangential direction of the cyclone pyrolyzer by nitrogen gas flow;

[0015] S2. Heating the cyclone pyrolyzer: heating the cyclone pyrolyzer by a heating device so that the inner cavity temperature of the cyclone pyrolyzer is 600°C to 1000°C;

[0016] S3. Cyclone pyrolysis of sludge: after the activated sludge particles enter the cyclone pyrolyzer along the tangential direction, the nitrogen inlet speed is adjusted so that the activated sludge particles maintain suspension motion in the cyclone pyrolyzer, and the self-revolution-suspension recirculation coupled pyrolysis of the particles is achieved;

[0017] S4. Cyclone separation and collection of pyrolysis products: After the pyrolysis is completed, the nitrogen intake rate is gradually adjusted to 0, so that the solid products of sludge pyrolysis flow to the bottom of the cyclone pyrolyzer for collection, and the pyrolysis gas and pyrolysis tar are discharged from the top of the cyclone pyrolyzer for collection.

[0018] The present invention adopts nitrogen as a carrier gas (the nitrogen intake speed of the present invention is achieved by controlling the nitrogen intake volume of the air inlet, and the nitrogen intake speed = nitrogen intake volume / inlet cross-sectional area). While maintaining an inert atmosphere, a cyclone field is formed by tangentially blowing nitrogen. The cyclone flow and tangential velocity gradient generated by the cyclone field continuously update the heat reaction layer on the surface of the sludge particles, thereby realizing efficient pyrolysis of the sludge particles layer by layer. At the same time, the tar and pyrolysis gas generated by the pyrolysis also migrate from the particle pores to the particle surface and are blown out by the nitrogen. After the pyrolysis is completed, the nitrogen flow rate is adjusted so that the pyrolysis solid phase product flows to the bottom of the cyclone pyrolyzer for collection, and the pyrolysis gas and tar are discharged from the top of the cyclone pyrolyzer for collection, thereby obtaining pure pyrolysis gas and tar.

[0019] According to an embodiment of the present invention, in step S1, 1.5 mol / L to 2 mol / L potassium hydroxide solution is used as an activating agent for sludge activation, and the sludge is activated by immersion for 20 to 30 hours.

[0020] According to an embodiment of the present invention, in step S1, the particle size of the sludge particles is 1 to 5 mm.

[0021] According to an embodiment of the present invention, the intake gas volume of nitrogen in step S1 and step S2 is 0.6m 3 / h~1.2m 3 / h, the air inlet cross-sectional area is 100mm 2 ~500mm 2 .

[0022] The present invention controls the speed of the nitrogen gas flow by controlling the intake volume of nitrogen, so that the sludge particles are in a high-speed rotating cyclone field during the pyrolysis process. The rotation speed of the sludge particles can reach tens of thousands of revolutions per minute. The cyclone flow and tangential velocity gradient generated by the cyclone field continuously renew the heat reaction layer on the surface of the sludge particles, thereby realizing efficient pyrolysis of the sludge particles layer by layer. At the same time, the high-speed shear force and mechanical stripping effect on the sludge in the cyclone field are utilized to enhance the centrifugal removal of the pyrolysis gas phase products and tar in the particles, thereby realizing a more thorough separation of the three-phase products after pyrolysis.

[0023] According to an embodiment of the present invention, in step S2, the heating rate of the cyclone pyrolyzer is controlled at 5°C / min to 10°C / min.

[0024] According to an embodiment of the present invention, the cyclone pyrolysis time in step S3 is 1.5 to 2 hours.

[0025] The second aspect of the present invention is to provide a sludge cyclone pyrolysis device, comprising:

[0026] A pyrolysis furnace, comprising a furnace shell and a heating chamber formed in the furnace shell, wherein an upper side wall of the furnace shell is provided with a pyrolysis furnace inlet, a top outlet of the pyrolysis furnace is provided at the top, and a bottom outlet of the pyrolysis furnace is provided at the bottom; the pyrolysis furnace is also provided with a pyrolysis furnace control unit for controlling the pyrolysis process;

[0027] A cyclone pyrolyzer, comprising a cyclone pyrolysis chamber, wherein the cyclone pyrolysis chamber is located in a heating chamber of a pyrolysis furnace; an overflow pipe is arranged at the top of the cyclone pyrolysis chamber, an underflow pipe is arranged at the bottom, and a tangential inlet is opened at a position near the top of the chamber side wall; the underflow pipe passes through the bottom outlet of the pyrolysis furnace, the overflow pipe passes through the top outlet of the pyrolysis furnace, and the tangential inlet passes through the inlet of the pyrolysis furnace;

[0028] A feed assembly, comprising a feed pipe and a feed funnel whose bottom is connected to the top wall of the feed pipe; wherein the feed pipe is sealedly connected to the tangential inlet for the introduction of nitrogen gas flow into the cyclone pyrolyzer and the activated sludge feeding, and the feed funnel is used to store the activated sludge particles;

[0029] An oil-gas separator, which is sealed and connected to the outlet end of the overflow pipe through a pipeline, and is used to receive and separate the tar and pyrolysis gas produced by pyrolysis;

[0030] The storage hopper is arranged at the lower end of the underflow pipe and is sealedly connected to the underflow pipe, and is used for collecting the solid products generated by the pyrolysis.

[0031] According to an embodiment of the present invention, the cyclone pyrolyzer is made of quartz.

[0032] According to an embodiment of the present invention, the upper half of the cavity of the cyclone pyrolysis cavity is a columnar structure, and the lower half is a tapered conical structure.

[0033] The cyclone pyrolysis chamber of the cyclone pyrolyzer of the present invention adopts this structure (the upper part is a columnar structure, and the lower part is a conical structure). During the pyrolysis process, the sludge particles can enhance the swirl at the interface between the column and the cone. Under the action of the rotating airflow, the sludge particles perform high-speed self-revolution-suspension recirculation coupled motion along the wall of the cyclone self-rotation pyrolyzer at the interface between the column and the cone, so that the sludge particles can be pyrolyzed more fully and efficiently. After the pyrolysis is completed, the pyrolysis products can be effectively separated in the cyclone pyrolyzer, and the pyrolysis reaction of the sludge particles and the separation of the pyrolysis products are carried out in the same device. The pyrolysis gas and pyrolysis tar are discharged from the top of the cyclone pyrolyzer into the oil-gas separator, and are further separated in the oil-gas separator to obtain pure pyrolysis tar and pyrolysis gas.

[0034] According to an embodiment of the present invention, the pyrolysis furnace is a vertical pyrolysis furnace, and the shape of the heating chamber of the pyrolysis furnace is consistent with the outer surface of the cyclone pyrolysis device.

[0035] The present invention adopts a vertical pyrolysis furnace to heat the cyclone pyrolyzer, which can provide a uniform pyrolysis space and a heat preservation environment for the sludge cyclone pyrolysis process, which is beneficial to the separation of subsequent pyrolysis products; the cavity shape of the heating furnace cavity of the vertical pyrolysis furnace is consistent with the cyclone pyrolyzer, ensuring that there is no dead angle in heating.

[0036] Compared with the prior art, the present invention has at least the following beneficial effects:

[0037] 1. The present invention uses nitrogen gas as carrier gas, utilizes the self-revolution-suspension recirculation coupled motion of the sludge particles themselves in the cyclone field, and combines the particle pyrolysis unreacted shrinking core model to accelerate the real-time renewal of the mass transfer and heat transfer surface of the particle surface. Convective heat exchange and radiation heat exchange continuously transfer heat to the renewed particle surface. The reaction interface of the particle surface can be renewed in real time, and the residence time in the cyclone reactor is also increased, thereby achieving full and efficient pyrolysis of the sludge particles.

[0038] 2. The present invention utilizes the high-speed shear force and mechanical stripping effect on the sludge in the cyclone field to strengthen the centrifugal removal of pyrolysis gas products and tar in particles. Compared with the traditional pyrolysis process, the pyrolysis of sludge and the separation of pyrolysis products in the present invention are carried out in the same device (cyclone pyrolyzer), achieving a more thorough separation of the three-phase products after pyrolysis; in addition, the improvement of sludge dehydration and pyrolysis efficiency and the saving of separation equipment correspondingly reduce process energy consumption;

[0039] 3. The three-phase product after pyrolysis of the present invention, activated carbon can be used as an adsorption material, the gas product is rich in hydrogen and can be made into high-grade gas or synthesis gas, and tar can also be used as a potential energy product. The present invention can not only alleviate environmental pollution problems, but also provide clean energy, and is an effective way to utilize sludge resources. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 It is a schematic structural diagram of the rotary pyrolysis device of the present invention.

[0041] Figure 2 It is a structural schematic diagram of the pyrolysis furnace of the present invention.

[0042] Figure 3 It is a schematic diagram of the structure of the cyclone pyrolyzer of the present invention.

[0043] Figure 4 The present invention is a process flow chart for preparing activated carbon and hydrogen-rich gas by pyrolysis of municipal sludge according to a preferred embodiment of the present invention.

[0044] In the figure: 10-pyrolysis furnace; 11-furnace shell; 12-heating chamber; 13-pyrolysis furnace inlet; 14-pyrolysis furnace top outlet; 15-pyrolysis furnace bottom outlet; 16-pyrolysis furnace control unit;

[0045] 20-cyclone pyrolyzer; 21-cyclone pyrolysis chamber; 22-overflow pipe; 23-underflow pipe; 24-tangential inlet;

[0046] 30-feeding assembly; 31-feeding pipe; 32-feeding funnel;

[0047] 40-Oil and gas separator;

[0048] 50-storage hopper;

[0049] 61- gravity sedimentation tank; 62- plate and frame filter press; 63- sludge crusher; 64- pulsating airflow generator; 65- pipe heater; 66- primary cyclone self-rotating dehydrator; 67- oscillating drying column; 68- secondary cyclone self-rotating dehydrator; 69- sludge activation tank; 610- water-gas separator DETAILED DESCRIPTION

[0050] The present invention is further described in detail below in conjunction with specific embodiments and examples. It should be understood that the following examples are only used to further illustrate the present invention and should not be construed as limiting the scope of protection of the present invention. Some non-substantial improvements and adjustments made by professionals and technicians in this field based on the content of the present invention still belong to the scope of protection of the present invention. The test methods for which specific conditions are not specified in the following examples are usually based on conventional conditions or the conditions recommended by the manufacturer. Unless otherwise stated, all percentages and parts are by weight.

[0051] The existing sludge pyrolysis methods are difficult to achieve sufficient pyrolysis inside the sludge particles, and the pyrolysis tar exists inside the sludge activated carbon product after pyrolysis, resulting in low quality of the pyrolysis product. In order to effectively solve the above technical problems, the present invention provides a sludge pyrolysis device and method with high pyrolysis efficiency, low process energy consumption and effective sludge resource utilization.

[0052] See also Figures 1 to 3 The sludge cyclone pyrolysis device of the present invention comprises

[0053] The pyrolysis furnace 10 includes a furnace shell 11 and a heating chamber 12 formed in the furnace shell 11. The upper side wall of the furnace shell 11 is provided with a pyrolysis furnace inlet 13, the top is provided with a pyrolysis furnace top outlet 14, and the bottom is provided with a pyrolysis furnace bottom outlet 15. The pyrolysis furnace 10 is also equipped with a pyrolysis furnace control unit 16 for controlling the pyrolysis process.

[0054] The cyclone pyrolyzer 20 has a cyclone pyrolysis chamber 21, which is located in the heating chamber 12 of the pyrolysis furnace 10; an overflow pipe 22 is provided at the top of the cyclone pyrolysis chamber 21, an underflow pipe 23 is provided at the bottom, and a tangential inlet 24 is provided at a position near the top of the chamber side wall; the overflow pipe 22 passes through the top outlet 14 of the pyrolysis furnace, the underflow pipe 23 passes through the bottom outlet 15 of the pyrolysis furnace, and the tangential inlet 24 passes through the inlet 13 of the pyrolysis furnace;

[0055] The feed assembly 30 includes a feed pipe 31 and a feed hopper 32 whose bottom is connected to the top wall of the feed pipe; wherein the feed pipe 31 is sealedly connected to the tangential inlet 24 for the introduction of nitrogen gas flow into the cyclone pyrolyzer 20 and the activated sludge feeding, and the feed hopper 32 is used to store the activated sludge particles;

[0056] The oil-gas separator 40 is sealedly connected to the outlet end of the overflow pipe 22 through a pipeline, and is used to receive and separate the tar and pyrolysis gas produced by pyrolysis;

[0057] The storage hopper 50 is disposed at the lower end of the underflow pipe 23 and is sealedly connected to the underflow pipe 23 for collecting the solid products generated by the pyrolysis.

[0058] When in use, the activated sludge particles are stored in the feed hopper 32; nitrogen is passed through the inlet of the feed pipe 31 (the nitrogen intake speed of the present invention is achieved by controlling the nitrogen intake volume of the feed pipe, and the nitrogen intake speed = nitrogen intake volume / feed pipe cross-sectional area), and the sludge particles enter the cyclone pyrolyzer 20 along the tangential direction through the feed pipe 31 under the action of the carrier gas nitrogen; the pyrolysis process is controlled by the pyrolysis furnace control unit 16; after the activated sludge particles enter the cyclone pyrolysis chamber 21 along the tangential direction, the nitrogen gas flow rate is adjusted so that The activated sludge particles are kept in suspended motion in the cyclone pyrolysis chamber 21, while achieving self-revolution-suspension recycling coupled pyrolysis of the particles; after the pyrolysis is completed, the nitrogen flow rate is gradually adjusted to 0, so that the solid product flows to the underflow pipe 23 at the bottom of the cyclone pyrolysis chamber 21, and is finally collected in the storage hopper 50; the pyrolysis gas and pyrolysis tar are discharged from the overflow pipe 22 at the top of the cyclone pyrolyzer 20 into the oil-gas separator 40, and the pyrolysis gas and pyrolysis tar are further separated in the oil-gas separator 40, and finally pure pyrolysis tar and pyrolysis gas are obtained.

[0059] Preferably, the cyclone pyrolyzer 20 is made of quartz material, which can withstand extremely high temperatures and is suitable for high temperature environments during the pyrolysis process.

[0060] Preferably, the upper half of the cyclone pyrolysis chamber 21 is a columnar structure, and the lower half is a tapered conical structure.

[0061] The cyclone pyrolysis chamber 21 of the cyclone pyrolyzer 20 of the present invention adopts this structure (the upper part is a columnar structure, and the lower part is a conical structure). During the pyrolysis process, the sludge particles can enhance the swirl at the interface between the column and the cone. Under the action of the rotating airflow, the sludge particles perform high-speed self-revolution-suspension recycling coupled motion along the wall of the cyclone self-rotation pyrolyzer at the interface between the column and the cone, so that the sludge particles can be fully and efficiently pyrolyzed; after the pyrolysis is completed, the pyrolysis products can be effectively separated in the cyclone pyrolyzer, and the pyrolysis reaction of the sludge particles and the separation of the pyrolysis products are carried out in the same device. The pyrolysis gas and pyrolysis tar are discharged from the top of the cyclone pyrolyzer into the oil-gas separator to obtain pure tar and pyrolysis gas.

[0062] Preferably, the pyrolysis furnace 10 is a vertical pyrolysis furnace, and the shape of the heating chamber 12 thereof matches the outer surface of the cyclone pyrolysis device 20 .

[0063] The present invention adopts a vertical pyrolysis furnace to heat the cyclone pyrolyzer 20, which can provide a uniform pyrolysis space and a heat preservation environment for the sludge cyclone pyrolysis process, which is beneficial to the subsequent separation of pyrolysis products; the cavity shape of the heating chamber 12 of the vertical pyrolysis furnace is consistent with the external shape of the cyclone pyrolyzer, ensuring that there is no dead angle in the heating.

[0064] The present invention also provides a sludge cyclone pyrolysis method, comprising the following steps:

[0065] S1. Activated sludge feeding: The activated sludge particles are brought into the cyclone pyrolyzer along the tangential direction of the cyclone pyrolyzer by nitrogen gas flow;

[0066] S2. Heating of the cyclone pyrolyzer: The cyclone pyrolyzer is heated by a heating device so that the inner cavity temperature of the cyclone pyrolyzer is 600°C to 1000°C;

[0067] S3. Sludge cyclone pyrolysis: After the activated sludge particles enter the cyclone pyrolyzer along the tangential direction, the nitrogen intake speed is adjusted so that the activated sludge particles maintain suspension motion in the cyclone pyrolyzer, and the particles achieve self-revolution-suspension recirculation coupled pyrolysis;

[0068] S4. Cyclone separation and collection of pyrolysis products: After the pyrolysis is completed, the nitrogen intake rate is adjusted to gradually 0, so that the solid products of sludge pyrolysis flow to the bottom of the cyclone pyrolyzer for collection, and the pyrolysis gas and pyrolysis tar are discharged from the top of the cyclone pyrolyzer for collection.

[0069] The present invention adopts nitrogen as a carrier gas (the nitrogen intake speed of the present invention is achieved by controlling the nitrogen intake volume of the air inlet, and the nitrogen intake speed = nitrogen intake volume / inlet cross-sectional area). While maintaining an inert atmosphere, a cyclone field is formed by tangentially blowing nitrogen. The cyclone flow and tangential velocity gradient generated by the cyclone field continuously update the heat reaction layer on the surface of the sludge particles, thereby realizing efficient pyrolysis of the sludge particles layer by layer. At the same time, the tar and pyrolysis gas generated by the pyrolysis also migrate from the particle pores to the particle surface and are blown out by the nitrogen. After the pyrolysis is completed, the nitrogen flow rate is adjusted so that the pyrolysis solid phase product flows to the bottom of the cyclone pyrolyzer for collection, and the pyrolysis gas and tar are discharged from the top of the cyclone pyrolyzer for collection, thereby obtaining pure pyrolysis gas and tar.

[0070] Preferably, in step S1, 1.5 mol / L to 2 mol / L potassium hydroxide solution is used as an activating agent for sludge activation, and the sludge is activated by immersion for 20 to 30 hours.

[0071] Preferably, in step S1, the particle size of the sludge particles is 1 to 5 mm.

[0072] Preferably, the intake volume of nitrogen in step S1 and step S2 is 0.6 m 3 / h~1.2m 3 / h, the air inlet cross-sectional area is 100mm 2 ~500mm 2 .

[0073] The present invention controls the speed of the nitrogen gas flow by controlling the intake volume of nitrogen, so that the sludge particles are in a high-speed rotating cyclone field during the pyrolysis process. The rotation speed of the sludge particles can reach tens of thousands of revolutions per minute. The cyclone flow and tangential velocity gradient generated by the cyclone field continuously renew the heat reaction layer on the surface of the sludge particles, thereby realizing efficient pyrolysis of the sludge particles layer by layer. At the same time, the high-speed shear force and mechanical stripping effect on the sludge in the cyclone field are utilized to enhance the centrifugal removal of the pyrolysis gas phase products and tar in the particles, thereby realizing a more thorough separation of the three-phase products after pyrolysis.

[0074] Preferably, in step S2, the heating rate of the cyclone pyrolyzer is controlled at 5°C / min to 10°C / min.

[0075] According to an embodiment of the present invention, the cyclone pyrolysis time in step S3 is 1.5 to 2 hours (the pyrolysis time is calculated from the time when the temperature reaches the pyrolysis temperature).

[0076] See also Figure 4 , a process flow chart of preparing activated carbon and hydrogen-rich gas by pyrolysis of municipal sludge in a preferred embodiment of the present invention; Figure 4 As shown, municipal sludge passes through a gravity settling tank 61 and is sent to a plate-and-frame filter press 62 for physical dehydration, and is then crushed into sludge particles of 1 to 5 mm by a sludge crusher 63; a pulsating airflow generator 64 and a pipe heater 65 generate a 60°C pulsating airflow with a sine-cosine waveform, and the sludge particles enter the primary cyclone self-rotating dehydrator 66, the oscillating drying column 67 and the secondary cyclone self-rotating dehydrator 68 in turn for deep dehydration, thereby finally achieving sludge drying and reduction; the sludge particles discharged from the bottom flow outlet of the secondary cyclone self-rotating dehydrator 68 enter the sludge activation tank 69, and are activated by a 1.5 mol / L~2mol / L potassium hydroxide solution is used as an activator, and the immersion activation is carried out for 20~30h. The waste gas discharged from the overflow port of the secondary cyclone self-rotating dehydrator 68 enters the water-gas separator 610, and the condensed water is collected from the bottom. The overflow port sends the airflow to the pulsating airflow generator 64 for recycling; the activated sludge particles are stored in the feed hopper 32 of the cyclone pyrolysis device; nitrogen is passed through the inlet of the feed pipe 31, and the sludge particles enter the cyclone pyrolyzer 20 through the feed pipe 31 located at the bottom of the feed funnel 32 under the action of the carrier gas nitrogen. The cross-sectional area of ​​the feed pipe 31 is 100~500mm 2 , adjust the nitrogen intake volume to 0.6m through the valve on the nitrogen storage tank 3 / h~1.2m 3 / h, the pyrolysis furnace control unit 16 controls the vertical pyrolysis furnace to heat the cyclone pyrolysis device 20, and sets the heating rate to 5℃ / min~10℃ / min, the pyrolysis temperature to 600℃~1000℃, and the pyrolysis time to 1.5h~2h. After the activated sludge particles enter the cyclone pyrolysis chamber 2 along the tangential direction, the nitrogen intake volume is adjusted to 0.6m 3 / h~1.2m 3 / h, so that the activated sludge particles can maintain suspended motion in the cyclone pyrolysis chamber 21, while achieving self-revolution-suspension recirculation coupled pyrolysis of the particles; after the pyrolysis is completed, the nitrogen flow rate is gradually adjusted to 0, so that the solid product flows to the storage hopper 50 through the bottom flow pipe 23, and finally collected in the storage hopper 50; the pyrolysis gas and pyrolysis tar are discharged from the overflow pipe 22 at the top of the cyclone pyrolysis chamber 21 into the oil-gas separator 40, and are further separated in the oil-gas separator 40 to obtain pure pyrolysis tar and pyrolysis gas. Among them, the primary cyclone self-rotation dehydrator 66, the oscillation drying column 67, the secondary cyclone self-rotation dehydrator 68 and the cyclone pyrolysis device can be connected in parallel.

[0077] In a municipal sludge resource utilization device, the dehydrated and dried sludge is pyrolyzed according to the method and device of the present invention, and the specific operation process and effect are described as follows:

[0078] 1. Source and nature of sludge

[0079] The municipal sludge used in the experiment of the present invention was taken from the secondary sedimentation tank of a sewage treatment plant in Shanghai. Before the experiment, the sludge after plate and frame filter pressing was pretreated and its properties were measured. Table 1 is the industrial analysis of the sludge; Table 2 is the elemental analysis of the sludge; Table 3 is the specific surface area and pore size analysis of the sludge.

[0080] Table 1 Industrial analysis of sludge

[0081] Components Moisture content (%) Volatile matter (%) Ash content (%) Density(g / L) sludge 63.2 55.9 42.8 1.01

[0082] Table 2 Sludge element analysis (dry basis, %)

[0083] element C H O N S sludge 25.18 4.8535 31.855 4.34 0.966

[0084] Table 3 Sludge specific surface area-pore size analysis

[0085]

[0086] 2. Preparation of sludge activated carbon by pyrolysis

[0087] (1) Sample processing

[0088] After passing through the gravity sedimentation tank 61, the municipal sludge is sent to the plate and frame filter press 62 for physical dehydration, and then crushed into sludge particles of 1 to 5 mm by the sludge crusher 63; the pulsating airflow generator 64 and the pipeline heater 65 generate the air into a 60°C pulsating airflow with a sine and cosine waveform. Under the action of the pulsating airflow, the sludge particles enter the primary cyclone self-rotating dehydrator 66, the oscillation drying column 67 and the secondary cyclone self-rotating dehydrator 68 in turn for deep dehydration, and finally the sludge is dried and reduced; the sludge particles discharged from the bottom flow outlet of the secondary cyclone self-rotating dehydrator 68 enter the sludge activation tank 69, and a 2 mol / L potassium hydroxide solution is used as an activator. The sludge particles are immersed and activated for 24 hours for standby use.

[0089] (2) Preparation of activated carbon from sewage sludge by cyclone pyrolysis

[0090] Example 1

[0091] S1. Activated sludge feeding: The activated sludge particles are stored in the feed hopper 32 of the cyclone pyrolysis device; nitrogen is passed through the inlet of the feed pipe 31, and the sludge particles enter the cyclone pyrolysis device 20 through the feed pipe 31 under the action of the carrier gas nitrogen. The cross-sectional area of ​​the feed pipe is 100mm 2 , adjust the nitrogen intake volume to 1m through the valve on the nitrogen storage tank 3 / h;

[0092] S2. Heating of the cyclone pyrolyzer: The pyrolysis furnace control unit 16 controls the vertical pyrolysis furnace to heat the cyclone pyrolyzer 20, setting the heating rate to 5°C / min, the pyrolysis temperature to 500°C, and the pyrolysis time to 2h;

[0093] S3. Sludge cyclone pyrolysis: After the activated sludge particles enter the cyclone pyrolysis chamber 21 along the tangential direction, the nitrogen intake volume is controlled to be 1m 3 / h, so that the activated sludge particles are kept in suspension in the cyclone pyrolysis chamber 21, while achieving self-revolution-suspension recirculation coupled pyrolysis of the particles;

[0094] S4. Cyclone separation and collection of pyrolysis products: After the pyrolysis is completed, the nitrogen flow rate is gradually adjusted to 0, so that the solid product (sludge activated carbon) flows into the bottom storage hopper 50 through the underflow pipe 23, and the pyrolysis gas and pyrolysis tar are discharged from the overflow pipe 22 at the top of the cyclone pyrolyzer 20 into the oil-gas separator 40, and are further separated in the oil-gas separator 40 to obtain pure pyrolysis tar and pyrolysis gas; the specific surface area and pore size of the obtained sludge activated carbon are analyzed, and the data obtained are shown in Table 4.

[0095] Example 2

[0096] S1. Activated sludge feeding: The activated sludge particles are stored in the feed hopper 32 of the cyclone pyrolysis device; nitrogen is passed through the inlet of the feed pipe 31, and the sludge particles enter the cyclone pyrolysis device 20 through the feed pipe 31 under the action of the carrier gas nitrogen. The cross-sectional area of ​​the feed pipe is 100mm 2 , adjust the nitrogen intake volume to 1m through the valve on the nitrogen storage tank 3 / h;

[0097] S2. Heating of the cyclone pyrolyzer: The pyrolysis furnace control unit 16 controls the vertical pyrolysis furnace to heat the cyclone pyrolyzer 20, setting the heating rate to 5°C / min, the pyrolysis temperature to 550°C, and the pyrolysis time to 2h;

[0098] S3. Sludge cyclone pyrolysis: After the activated sludge particles enter the cyclone pyrolysis chamber 21 along the tangential direction, the nitrogen intake volume is controlled to be 1m 3 / h, so that the activated sludge particles are kept in suspension in the cyclone pyrolysis chamber 21, while achieving self-revolution-suspension recirculation coupled pyrolysis of the particles;

[0099] S4. Cyclone separation and collection of pyrolysis products: After the pyrolysis is completed, the nitrogen flow rate is gradually adjusted to 0, so that the solid product (sludge activated carbon) flows into the bottom storage hopper 50 through the underflow pipe 23, and the pyrolysis gas and pyrolysis tar are discharged from the overflow pipe 22 at the top of the cyclone pyrolyzer 20 into the oil-gas separator 40, and are further separated in the oil-gas separator 40 to obtain pure pyrolysis tar and pyrolysis gas; the specific surface area and pore size of the obtained sludge activated carbon are analyzed, and the data obtained are shown in Table 4.

[0100] Example 3

[0101] S1. Activated sludge feeding: The activated sludge particles are stored in the feed hopper 32 of the cyclone pyrolysis device; nitrogen is passed through the inlet of the feed pipe 31, and the sludge particles enter the cyclone pyrolysis device 20 through the feed pipe 31 under the action of the carrier gas nitrogen. The cross-sectional area of ​​the feed pipe is 100mm 2 , adjust the nitrogen intake volume to 1m through the valve on the nitrogen storage tank 3 / h;

[0102] S2. Heating of the cyclone pyrolyzer: The pyrolysis furnace control unit 16 controls the vertical pyrolysis furnace to heat the cyclone pyrolyzer 20, setting the heating rate to 5°C / min, the pyrolysis temperature to 600°C, and the pyrolysis time to 2h;

[0103] S3. Sludge cyclone pyrolysis: After the activated sludge particles enter the cyclone pyrolysis chamber 21 along the tangential direction, the nitrogen intake volume is controlled to be 1m 3 / h, so that the activated sludge particles are kept in suspension in the cyclone pyrolysis chamber 21, while achieving self-revolution-suspension recirculation coupled pyrolysis of the particles;

[0104] S4. Cyclone separation and collection of pyrolysis products: After the pyrolysis is completed, the nitrogen flow rate is gradually adjusted to 0, so that the solid product (sludge activated carbon) flows into the bottom storage hopper 50 through the underflow pipe 23, and the pyrolysis gas and pyrolysis tar are discharged from the overflow pipe 22 at the top of the cyclone pyrolyzer 20 into the oil-gas separator 40, and are further separated in the oil-gas separator 40 to obtain pure pyrolysis tar and pyrolysis gas; the specific surface area and pore size of the obtained sludge activated carbon are analyzed, and the data obtained are shown in Table 4.

[0105] Example 4

[0106] S1. Activated sludge feeding: The activated sludge particles are stored in the feed hopper 32 of the cyclone pyrolysis device; nitrogen is passed through the inlet of the feed pipe 31, and the sludge particles enter the cyclone pyrolysis device 20 through the feed pipe 31 under the action of the carrier gas nitrogen. The cross-sectional area of ​​the feed pipe is 100mm 2 , adjust the nitrogen intake volume to 1m through the valve on the nitrogen storage tank 3 / h;

[0107] S2. Heating of the cyclone pyrolyzer: The pyrolysis furnace control unit 16 controls the vertical pyrolysis furnace to heat the cyclone pyrolyzer 20, setting the heating rate to 5°C / min, the pyrolysis temperature to 650°C, and the pyrolysis time to 2h;

[0108] S3. Sludge cyclone pyrolysis: After the activated sludge particles enter the cyclone pyrolysis chamber 21 along the tangential direction, the nitrogen intake volume is controlled to be 1m 3 / h, so that the activated sludge particles are kept in suspension in the cyclone pyrolysis chamber 21, while achieving self-revolution-suspension recirculation coupled pyrolysis of the particles;

[0109] S4. Cyclone separation and collection of pyrolysis products: After the pyrolysis is completed, the nitrogen flow rate is gradually adjusted to 0, so that the solid product (sludge activated carbon) flows into the bottom storage hopper 50 through the underflow pipe 23, and the pyrolysis gas and pyrolysis tar are discharged from the overflow pipe 22 at the top of the cyclone pyrolyzer 20 into the oil-gas separator 40, and are further separated in the oil-gas separator 40 to obtain pure pyrolysis tar and pyrolysis gas; the specific surface area and pore size of the obtained sludge activated carbon are analyzed, and the data obtained are shown in Table 4.

[0110] (3) Preparation of activated carbon by conventional pyrolysis

[0111] Comparative Example 1

[0112] The activated sludge particles were pyrolyzed by conventional pyrolysis method, and the specific surface area and pore size of the obtained sludge activated carbon were analyzed. The data are shown in Table 4.

[0113] Table 4 Specific surface area-pore size analysis of activated carbon from sludge prepared by different pyrolysis methods and pyrolysis temperatures

[0114]

[0115] From the specific surface area and pore size analysis results of the sludge activated carbon in Table 4, it can be seen that the cyclone pyrolysis method of the present invention has greatly improved the specific surface area and micropore volume compared with the conventional pyrolysis method. When pyrolysis is used to prepare sludge activated carbon, temperature is the most important parameter. When the pyrolysis temperature is 600°C, the specific surface area of ​​the sludge activated carbon prepared by conventional tubular furnace pyrolysis is only 105.2207 m 2 / g, while the specific surface area of ​​sludge activated carbon prepared by cyclone pyrolysis method reached 132.5391m 2 / g and the micropore volume is 0.006036cm 3 / g increased to 0.010080cm 3 / g; It can be seen that the sludge activated carbon prepared by the method of the present invention has a better adsorption capacity.

[0116] 3. Preparation of hydrogen-rich gas by pyrolysis

[0117] (1) Sample processing

[0118] After passing through the gravity settling tank, the municipal sludge is sent to the plate and frame filter press for physical dehydration. Subsequently, the sludge raw material is treated by the dispersion medium mixing-cyclone self-rotation drying technology to form spherical sludge particles. By adjusting the operating parameters in the drying process, sludge particles with a moisture content of 30% are obtained; the dried sludge particles enter the sludge activation tank 23, and a 2 mol / L potassium hydroxide solution is used as an activator, and the sludge particles are immersed and activated for 24 hours for standby use;

[0119] (2) Preparation of hydrogen-rich gas by cyclone pyrolysis

[0120] Example 5

[0121] S1. Activated sludge feeding: The activated sludge particles are stored in the feed hopper 32 of the cyclone pyrolysis device; nitrogen is passed through the inlet of the feed pipe 31, and the sludge particles enter the cyclone pyrolysis device 20 through the feed pipe 31 under the action of the carrier gas nitrogen. The cross-sectional area of ​​the feed pipe is 100mm 2 , adjust the nitrogen intake volume to 1m through the valve on the nitrogen storage tank 3 / h;

[0122] S2. Heating of the cyclone pyrolyzer: The pyrolysis furnace control unit 16 controls the vertical pyrolysis furnace to heat the cyclone pyrolyzer 20, setting the heating rate to 10°C / min, the pyrolysis temperature to 900°C, and the pyrolysis time to 2h;

[0123] S3. Sludge cyclone pyrolysis: After the activated sludge particles enter the cyclone pyrolysis chamber 21 along the tangential direction, the nitrogen intake volume is controlled to be 1m 3 / h, so that the activated sludge particles are kept in suspension in the cyclone pyrolysis chamber 21, while achieving self-revolution-suspension recirculation coupled pyrolysis of the particles;

[0124] S4. Cyclone separation and collection of pyrolysis products: After the pyrolysis is completed, the nitrogen flow rate is gradually adjusted to 0, so that the solid product (sludge activated carbon) flows into the bottom storage hopper 50 through the underflow pipe 23, and the pyrolysis gas and pyrolysis tar are discharged from the overflow pipe 22 at the top of the cyclone pyrolyzer 20 into the oil-gas separator 40, and are further separated in the oil-gas separator 40 to obtain pure pyrolysis tar and pyrolysis gas; the gas in the cyclone pyrolysis process is collected by a gas collecting bag to obtain sludge cyclone pyrolysis gas, which is detected by a gas chromatograph to obtain the hydrogen production data shown in Table 5; the obtained pyrolysis gas components are shown in Table 7.

[0125] Comparative Example 2

[0126] The activated sludge particles were pyrolyzed at 900°C in a fixed bed reactor, and the gas during the pyrolysis process was collected by a gas collecting bag to obtain sludge cyclone pyrolysis gas, which was detected by a gas chromatograph and the data obtained are shown in Table 5.

[0127] Table 5 Preparation of hydrogen-rich gas by different pyrolysis methods

[0128] Pyrolysis materials Pyrolysis equipment Pyrolysis temperature(℃) Hydrogen production (mL / g) Sewage sludge Cyclone pyrolyzer 900 265.78 Sewage sludge Fixed bed reactor 900 106.624

[0129] Fixed bed reactor is currently a common means of sludge pyrolysis. The material is placed in a tube furnace and fixed. The heat transfer efficiency between particles during the pyrolysis process is poor, and the sludge material is easily heated unevenly. It takes a long pyrolysis time to completely pyrolyze the material. In contrast, the cyclonic pyrolysis technology allows the sludge particles to move along the inner wall of the reactor at a high speed of suspension and self-revolution under the action of the rotating airflow. The heat transfer surface area between the particles and the airflow increases due to the self-revolution of the particles, which accelerates the mass transfer rate during the pyrolysis process and directly increases the pyrolysis cycle of the sludge material. At the same time, the self-revolution coupled centrifugal force initially separates the pyrolysis gas, tar and pyrolysis carbon particles, thus presenting a higher pyrolysis efficiency. As can be seen from the table, under the same experimental materials and pyrolysis temperature, the unit sludge hydrogen production of the sludge pyrolysis in a fixed bed tube furnace is only 106.624mL / g; while the unit sludge hydrogen production of the cyclonic suspension self-rotation pyrolysis technology in this study is as high as 265.78mL / g, which is 2.49 times the hydrogen production of the fixed bed reactor.

[0130] Example 6

[0131] Compared with Example 5, the moisture content of the sample sludge in this example is 20%, and the other aspects are the same. The components of the collected pyrolysis gas are tested, and the data obtained are shown in Table 6.

[0132] Example 7

[0133] Compared with Example 5, the moisture content of the sample sludge in this example is 35%, and the other parameters are the same. The collected pyrolysis gas is subjected to component detection, and the data obtained are shown in Table 6.

[0134] Example 8

[0135] Compared with Example 5, the moisture content of the sample sludge in this example is 50%, and the other aspects are the same. The components of the collected pyrolysis gas are tested, and the data obtained are shown in Table 6.

[0136] Table 6 Pyrolysis gas components obtained from sludge particles with different moisture contents

[0137] Moisture content (%) <![CDATA[CO 2 (%)]]> CO(%) <![CDATA[CH 4 (%)]]> <![CDATA[H 2 (%)]]> 20 30.16 35.1 0.12 34.62 35 21.15 41.67 0.05 37.13 50 16.16 42.32 0.04 41.38

[0138] Example 9

[0139] Compared with Example 5, the pyrolysis temperature of this example is 700° C., and the other parameters are the same. The components of the collected pyrolysis gas are detected, and the data obtained are shown in Table 7.

[0140] Example 10

[0141] Compared with Example 5, the pyrolysis temperature of this example is 800° C., and the other parameters are the same. The components of the collected pyrolysis gas are detected, and the data obtained are shown in Table 7.

[0142] Table 7 Pyrolysis gas components obtained under different temperature conditions

[0143] Pyrolysis temperature(℃) <![CDATA[CO 2 (%)]]> CO(%) <![CDATA[CH 4 (%)]]> <![CDATA[H 2 (%)]]> 700 34.42 37.26 0.24 28.07 800 14.46 49.28 0.14 36.12 900 21.15 41.67 0.05 37.13

[0144] It can be seen from Tables 6 and 7 that when preparing hydrogen-rich gas by cyclone pyrolysis, the higher the moisture content of the sludge particles, the higher the hydrogen content in the prepared pyrolysis gas; the higher the pyrolysis temperature, the higher the hydrogen content in the prepared pyrolysis gas.

[0145] The cyclone pyrolysis technology in the present invention has unique advantages. While greatly shortening the pyrolysis time, it improves the pyrolysis efficiency of sludge particles and obtains higher quality activated carbon, which is in line with the "reduction, harmlessness, and resource utilization" in the field of sludge treatment.

[0146] The above-listed embodiments are only preferred embodiments of the present invention and are not intended to limit the scope of implementation of the present invention. That is, all equivalent changes and modifications made according to the content of the patent application scope of the present invention should be within the technical scope of the present invention.

[0147] All documents mentioned in the present invention are cited as references in this application, just as each document is cited as reference individually. In addition, it should be understood that after reading the above teachings of the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms also fall within the scope defined by the claims assigned to this application.

Claims

1. A sludge cyclone pyrolysis method, characterized in that: The following steps are involved: S1. Activated sludge feeding: The activated sludge particles are brought into the cyclone pyrolyzer along the tangential direction of the cyclone pyrolyzer by nitrogen gas flow; S2. Heating the cyclone pyrolyzer: heating the cyclone pyrolyzer by a heating device so that the inner cavity temperature of the cyclone pyrolyzer is 600°C to 1000°C; S3. Cyclone pyrolysis of sludge: after the activated sludge particles enter the cyclone pyrolyzer along the tangential direction, the nitrogen inlet speed is adjusted so that the activated sludge particles maintain suspension motion in the cyclone pyrolyzer, and the self-revolution-suspension recirculation coupled pyrolysis of the particles is achieved; S4. Cyclone separation and collection of pyrolysis products: After the pyrolysis is completed, the nitrogen intake rate is gradually adjusted to 0, so that the solid products of sludge pyrolysis flow to the bottom of the cyclone pyrolyzer for collection, and the pyrolysis gas and pyrolysis tar are discharged from the top of the cyclone pyrolyzer for collection.

2. The sludge cyclone pyrolysis method according to claim 1, characterized in that: In the step S1, 1.5 mol / L to 2 mol / L potassium hydroxide solution is used as an activating agent for sludge activation, and the sludge is activated by immersion for 20 to 30 hours.

3. The sludge cyclone pyrolysis method according to claim 1, characterized in that: In the step S1, the particle size of the sludge particles is 1 to 5 mm.

4. The sludge cyclone pyrolysis method according to claim 1, characterized in that: The nitrogen intake volume in step S1 and step S2 is 0.6m 3 / h~1.2m 3 / h, the air inlet cross-sectional area is 100mm 2 ~500mm 2 .

5. The sludge cyclone pyrolysis method according to claim 1, characterized in that: In the step S2, the heating rate of the cyclone pyrolyzer is controlled at 5°C / min to 10°C / min.

6. The sludge cyclone pyrolysis method according to claim 1, characterized in that: The cyclone pyrolysis time in step S3 is 1.5 to 2 hours.

7. A sludge cyclone pyrolysis device, characterized in that: include A pyrolysis furnace, comprising a furnace shell and a heating chamber formed in the furnace shell, wherein an upper side wall of the furnace shell is provided with a pyrolysis furnace inlet, a top outlet of the pyrolysis furnace is provided at the top, and a bottom outlet of the pyrolysis furnace is provided at the bottom; the pyrolysis furnace is also provided with a pyrolysis furnace control unit for controlling the pyrolysis process; A cyclone pyrolyzer, comprising a cyclone pyrolysis chamber, wherein the cyclone pyrolysis chamber is located in a heating chamber of a pyrolysis furnace; an overflow pipe is arranged at the top of the cyclone pyrolysis chamber, an underflow pipe is arranged at the bottom, and a tangential inlet is opened at a position near the top of the chamber side wall; the underflow pipe passes through the bottom outlet of the pyrolysis furnace, the overflow pipe passes through the top outlet of the pyrolysis furnace, and the tangential inlet passes through the inlet of the pyrolysis furnace; A feed assembly, comprising a feed pipe and a feed funnel whose bottom is connected to the top wall of the feed pipe; wherein the feed pipe is sealedly connected to the tangential inlet for the introduction of nitrogen gas flow into the cyclone pyrolyzer and the activated sludge feeding, and the feed funnel is used to store the activated sludge particles; An oil-gas separator, which is sealed and connected to the outlet end of the overflow pipe through a pipeline, and is used to receive and separate the tar and pyrolysis gas produced by pyrolysis; The storage hopper is arranged at the lower end of the underflow pipe and is sealedly connected to the underflow pipe, and is used for collecting the solid products generated by the pyrolysis.

8. The sludge cyclone pyrolysis device according to claim 7, characterized in that: The cyclone pyrolyzer is made of quartz.

9. The sludge cyclone pyrolysis device according to claim 7, characterized in that: The upper half of the cyclone pyrolysis chamber is a columnar structure, and the lower half is a tapered conical structure.

10. The sludge cyclone pyrolysis device according to claim 7, characterized in that: The pyrolysis furnace is a vertical pyrolysis furnace, and the shape of the heating chamber thereof matches the outer surface of the cyclone pyrolysis device.

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