A granular coal pyrolysis carbonization device

Abstract

The present invention discloses a granular coal pyrolysis and carbonization device, which relates to the field of pyrolysis equipment. The device comprises a high-temperature pyrolysis system, comprising a plurality of carbonization chambers disposed within a furnace body, with a waste heat exchange system and a coke removal system sequentially disposed below the carbonization chambers. The high-temperature pyrolysis system is externally connected to a clean coal transportation and storage system for transporting granular coal to the high-temperature pyrolysis system for pyrolysis. The high-temperature pyrolysis system is also connected to a gas recovery and processing system capable of processing and recovering the gas generated by the pyrolysis of the granular coal. The granular coal pyrolysis and carbonization device provided by the present invention can improve coal pyrolysis efficiency and increase production capacity.

Description

Technical Field

[0001] The present invention relates to the technical field of pyrolysis equipment, in particular to a granular coal pyrolysis and carbonization device. Background Art

[0002] Coal is called "black gold". The Shenfu Coalfield in Yulin City, Shaanxi Province, has high quality advantages, such as low ash, low sulfur, low phosphorus, and high calorific value. Its content of harmful elements such as fluorine, chlorine, and arsenic is extremely low, which has been recognized by the market and has become a hot-selling coal in the market. Coal pyrolysis belongs to the coal chemical industry. The pyrolysis furnace is the core equipment of the coal chemical industry. The process of heating the raw coal to decompose it under the condition of isolating it from air and oxygen is collectively called pyrolysis. The pyrolysis products are semi-coke, coal gas, and coal tar. In recent years, our country has designed various forms of pyrolysis furnaces. The mature internal heating vertical furnace is the one in industrial operation. The full utilization of coal resources has become the focus of people's attention. However, the existing coal pyrolysis equipment has low production capacity and low working efficiency, which restricts the development of the industry. Summary of the Invention

[0003] The purpose of the present invention is to provide a granular coal pyrolysis and carbonization device to solve the problems existing in the above-mentioned prior art, thereby improving the coal pyrolysis efficiency and increasing the production capacity.

[0004] To achieve the above object, the present invention provides the following solutions:

[0005] The present invention provides a granular coal pyrolysis and carbonization device, including a high-temperature pyrolysis system, the high-temperature pyrolysis system including a plurality of carbonization chambers arranged in a furnace body, a waste heat exchange system and a coke discharge system are sequentially arranged below the carbonization chambers; the high-temperature pyrolysis system is externally connected to a clean coal transportation and storage system, the clean coal transportation and storage system is used to transport granular coal to the high-temperature pyrolysis system for pyrolysis, the high-temperature pyrolysis system is connected to a coal gas recovery and treatment system, the coal gas recovery and treatment system can process and recover the coal gas generated by the pyrolysis of granular coal; the present invention is also provided with a remote intelligent control system, which is used to start and stop the main equipment and VOCs equipment of the semi-coke furnace, adjust parameters, interlock, alarm, material level, temperature, pressure, and toxic and harmful gas detection, all of which are remotely controlled and displayed by DCS.

[0006] Optionally, the high-temperature pyrolysis system includes eight carbonization chambers arranged in the same furnace body, and every eight carbonization chambers form a furnace. Every four carbonization chambers form a group, and the carbonization chambers include a preheating zone, a high-temperature pyrolysis zone, and a low-temperature cooling zone arranged in sequence from top to bottom. The preheating zones of every four carbonization chambers form a common inner cavity, and a dust removal hood is provided at the common inner cavity to isolate the coal powder generated by the lower coal, and the pyrolysis coal gas is discharged from the outer side of the dust removal hood and the inner wall of the common inner cavity to be collected through a pipe, which effectively solves the problem of coal powder in the coal gas. The low-temperature zone is provided with a built-in water-cooled internal wind combustion aid, and the head of the water-cooled internal wind combustion aid is located at the lower part of the high-temperature zone, and can assist in the combustion and heating of the granular coal by adjusting the air volume, so that lignite is produced without recycled coal gas. The quality of lignite is guaranteed and the coal gas production is large.

[0007] Optionally, a first cooling water jacket and a second cooling water jacket are sequentially provided at the bottom of the furnace body, and a water-cooled straight beam is provided in the second cooling water jacket, so that the semi-coke formed by pyrolysis in the high-temperature pyrolysis system can enter the waste heat exchange system after passing through the inner cavity of the first cooling water jacket, the water-cooled straight beam and the inner cavity of the second cooling water jacket; the waste heat exchange system comprises an upper heat exchange module and a lower heat exchange module, and the center line of the tube row of the upper heat exchange module and the center line of the tube row of the lower heat exchange module are parallel and staggered by half of the tube row spacing; the bottom of the tube row of the upper heat exchange module and the bottom of the tube row of the lower heat exchange module are respectively provided with a medium inlet, the top of the tube row of the upper heat exchange module and the top of the tube row of the lower heat exchange module are respectively provided with a medium outlet, and heat exchange medium is respectively provided in the tube row of the upper heat exchange module and the tube row of the lower heat exchange module; during the pyrolysis process, the granular coal absorbs heat and slowly cools down through the waste heat exchange module, which not only solves the problem of uniform cooling in the coke powder production process, but also better solves the problem of waste of heat energy in quenching in the semi-coke production process. Each furnace is equipped with a heat exchange module with an evaporation capacity of 5t / h, a rated steam pressure of 4.2MPa, a rated steam temperature of 254.7°C (saturated steam), a feed water temperature of 60°C (provided by the power plant's deaerator), and a blowdown rate of 3%. The steam is then transported to the self-owned power plant, overheated in the superheater, and then generates electricity, achieving full utilization of thermal energy and reducing energy consumption.

[0008] Optionally, the coke discharge system includes a coke pushing box, a coke receiving port is provided on the top of the coke pushing box, a material distributor is provided in the coke pushing box, a coke pushing bed is provided below the coke pushing box, a cooling water pipe is connected to the coke pushing bed, an electro-hydraulic push rod is connected to one end of the coke pushing bed, and the electro-hydraulic push rod can drive the coke pushing bed to move horizontally back and forth, a closed coke receiving bin is provided below one side of the coke pushing bed, a closed scraper is provided at the bottom of the closed coke receiving bin, a spray device is provided on the top of the closed scraper, and the closed scraper is connected to the The system features an enclosed coke storage bin, which is connected to the enclosed coke discharge bin located at the top of the underground corridor via an enclosed explosion-proof electro-hydraulic flat valve. Below the enclosed coke discharge bin, an enclosed explosion-proof electro-hydraulic flat gate valve is installed, allowing the semi-coke coke from the enclosed coke discharge bin to be discharged onto the coke conveyor in the underground corridor at a predetermined time. A VOC gas collection hood is installed at the coke discharge port of the enclosed coke discharge bin. After heat exchange in the waste heat exchanger, the semi-coke enters the coke pusher, which is optimally configured with one electro-hydraulic pusher for every two carbonization chambers. Each pusher's pusher rod is cooled by circulating cooling water. Copper sleeves seal the front and rear of each pusher rod, and each pusher is equipped with a removable bearing pressure wheel, ensuring smooth horizontal reciprocating movement. A collection port and a material distributor are located above the pusher, and the water flow is controlled by a cooling circulating water valve, ensuring that the pusher rods do not deform due to heat within the pusher and further cooling the semi-coke. The coke pusher in the coke pushing box moves back and forth continuously, pushing the cooled lignite into the closed coke collecting bin, and then the closed scraper conveyor that falls into the bottom of the bin enters the coke storage box, where the VOCs gas is collected and processed.

[0009] Optionally, the coal gas recovery and processing system includes a coal gas branch pipe, and the coal gas generated by pyrolysis in the high-temperature pyrolysis system can enter the coal gas branch pipe through the inner wall of the common inner cavity and the outer wall of the dust removal hood; the gas branch pipe is provided with an electric turbine worm butterfly valve, one end of the gas branch pipe is connected to the furnace top coal gas collection single furnace pipeline, the output end of the furnace top coal gas collection single furnace pipeline is provided with a first electric blind plate valve, a first electric turbine worm butterfly valve and a furnace top gas explosion-proof plate, the end of the furnace top coal gas collection single furnace pipeline is connected to the coal gas main pipeline, the coal gas main pipeline is connected to the electric collector through the gas branch pipeline, the second electric blind plate valve and the second electric turbine worm butterfly valve, and the end of the electric collector is connected to the coal gas output pipeline , gas electric blind plate valve, gas electric turbine worm butterfly valve are connected to the gas main pipeline after electric capture; the gas main pipeline after electric capture is connected to the gas branch pipeline of the fan respectively, and is installed with manual butterfly valve and electric butterfly valve, and enters the air inlet of the volute centrifugal fan through the pipeline connection, is pressurized by the fan, and then outputted through the gas branch pipe, electric butterfly valve and manual butterfly valve at the air outlet, and respectively enters the gas output main pipeline to the metal magnesium plant and the gas output main pipeline to the self-contained power plant after electric capture, and a connecting valve is installed between the two gas output main pipelines; the mixed oil produced after purification and separation by each electric capture naturally flows into the water seal of each electric capture, flows into the mixed oil main pipeline, and then flows into the oil-water separation device for oil-water separation treatment. First, using the natural drop, the mixed oil enters the primary oil-water separator (multi-tank) for oil-water separation. Low-moisture coal tar is directly separated from the bottom and pumped into the tar storage tank through a tar pump and pipeline for export. The light oil separated from the upper surface of the ammonia water in the primary oil-water separator (multi-tank) is pumped into the light oil tank for export by the light oil pump. The ammonia water discharged from the primary oil-water separator is pumped into the ammonia water tank through a pipeline by the ammonia water pump and transported to a dedicated ammonia water collection tank for unified treatment. The entire oil-water separation device adopts a closed design, equipped with ventilation and VOCs gas collection, and is uniformly treated by a VOCs treatment tower. The condensed water in the coal gas and the ammonia water in the mixed oil enter the dedicated ammonia water collection tank through a pipeline and are transported to the self-contained power plant boiler by the ammonia water pump. They are then sent into the furnace for incineration by a high-pressure pump through an atomizing nozzle, and have a denitrification effect on the boiler flue gas.

[0010] Optionally, the end of the gas output main pipeline to the magnesium plant is equipped with an electric gas switching valve, the end of the gas output main pipeline to the self-contained power plant is equipped with an electric switching valve, and the gas main pipeline to the magnesium plant and the gas main pipeline to the self-contained power plant are both equipped with pneumatic regulating butterfly valves; the top of each furnace body is equipped with a vent branch pipe, a raw gas vent pneumatic quick-cut butterfly valve and a raw gas vent main pipe; a gas vent branch pipe and a gas vent pneumatic quick-cut butterfly valve are installed at the top of the initial end of the gas main pipeline to the self-contained power plant and the top of the initial end of the gas output main pipeline to the magnesium plant respectively, and the two gas vent branches are connected to the gas vent main pipeline, transported to a safe position of the gas vent pipe, and ignited and burned by an automatic igniter.

[0011] Optionally, the combustion-supporting gas of the water-cooled internal air combustion aid is a mixture of air and VOCs gas; a volute-type centrifugal blower is provided on one side of the furnace body, and the volute-type centrifugal blower delivers combustion-supporting air to the built-in water-cooled internal air combustion aid in each carbonization chamber through air ducts and electric regulating valves; every two furnaces (16 carbonization chambers) are equipped with three volute-type centrifugal blowers, forming two for use and one for backup, which are connected to the built-in water-cooled internal air combustion aid in each carbonization chamber through air ducts and electric regulating valves to deliver air for combustion in the high-temperature zone.

[0012] Optionally, a cooling water circulation system is provided in the carbonization chamber, and the cooling water circulation system includes a cooling circulating water pump, which is connected in sequence to a cooling circulating water pipeline and a sub-pipe cooling circulating water storage tank. The circulating water storage tank is equipped with a sewage manhole, a liquid level gauge, an exhaust pipe and a control valve, a sewage valve and pipeline, and a cooling circulating water storage tank base. The cooling circulating water branches of the cooling circulating water storage tank are respectively installed with control valves, which are respectively connected to the water inlet pipe at the bottom of the water-cooled internal wind combustion aid in the carbonization chamber.

[0013] The optional clean coal transportation and storage system includes a coal conveying corridor equipped with inspection robots. The belt conveyor uses robot inspections. The clean coal storage (washed granular coal) bin uses an enclosed coal bin with negative pressure dust collection, effectively solving the dust problem caused by manual inspections and coal dropping. The clean coal transportation and storage system is equipped with a coal conveyor belt robot inspection and alarm, effectively reducing manpower waste. Each carbonization chamber is equipped with a fixed-quantity coal bin to ensure uniform coal delivery to each carbonization chamber. The clean coal storage bin and fixed-quantity coal bin are equipped with closed electro-hydraulic flat gate valves. The double-chamber, double-gate valve effectively controls the escape of toxic and harmful gases. The top of the furnace body is equipped with a top platform, which is equipped with forward and return belt conveyors and a belt distribution machine. The end of the coal conveying corridor is located above the forward and return belt conveyors. A coal storage bin is located below the belt distribution machine. The bottom of the coal storage bin is equipped with a fully enclosed electro-hydraulic flat valve. Below the fully enclosed electro-hydraulic flat valve is a furnace feed fixed-quantity bin. According to production needs, the closed electro-hydraulic flat gate valves opened above and below the fixed-quantity bin can be used to discharge fixed quantities of coal into the furnace. It not only solves the problem of quantitative and uniform coal feeding, but also controls the overflow of toxic and harmful gases, meeting environmental protection needs. A fully enclosed electro-hydraulic flat valve is installed under the quantitative bin, and the bottom of the quantitative bin is connected to the carbonization chamber in the furnace body through a coal conveying box.

[0014] Compared with the prior art, the present invention has achieved the following technical effects:

[0015] In the present invention, the upper preheating zone of each of the four carbonization chambers forms a common inner cavity, which preheats the coal entering the device. A special dust collecting hood is provided on the top of each of the four carbonization chambers. During production operation, the coal powder generated by the lower coal is isolated, and the mixed gas generated during dry distillation and pyrolysis is divided for the first time. The pyrolysis mixed gas is collected from the exhaust pipe between the outside of the dust collecting hood and the inner wall of the common inner cavity. By interfering with the flue gas path and time, the separation of the mixed gas and coal powder in the furnace is better solved, and the dust content in the coal tar is better reduced. Each carbonization chamber is respectively provided with a high-temperature zone and a low-temperature cooling zone. The built-in water-cooled combustion aid in each chamber is used to assist the pyrolysis of granular coal, and the quality of the coke powder is effectively adjusted through the air supply system. In this way, lignite coke powder is produced without recycled coal gas, the quality of lignite coke powder is guaranteed, and the gas production is large, which is very suitable for supporting enterprises with large gas requirements. The present invention optimizes the design of the tube rows of the upper and lower waste heat exchange modules in the same direction. When the spacing between the tube rows of the upper and lower heat exchange modules remains unchanged and does not affect the material flow, the center line of the lower tube row is parallel to the center line of the upper tube row and each is offset by 1 / 2 of the tube row spacing. During the dry distillation and pyrolysis process of the semi-coke, the granular coal forms a natural alternation and uniform dry distillation temperature field in the inner cavity of the waste heat exchange module, which effectively changes the phenomenon of overburning or underburning that is prone to occur during the pyrolysis of the semi-coke, making the granular coal more fully utilized in the high-temperature pyrolysis process, thereby improving the quality of the semi-coke. By adjusting the speed of the coke pusher at the bottom of the waste heat exchange module to push the coke powder, the granular coal undergoes an endothermic reaction in the waste heat exchange module to slowly cool down the temperature, which effectively solves the problem of waste of heat energy from quenching during the cooling process of semi-coke production. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0017] Figure 1 This is a front view of the granular coal pyrolysis and carbonization device of the present invention;

[0018] Figure 2 This is a side view of the granular coal pyrolysis and carbonization device of the present invention;

[0019] Figure 3 This is a top view of the granular coal pyrolysis and carbonization device of the present invention;

[0020] Figure 4-1 This is a front view of the dust collecting hood of the present invention;

[0021] Figure 4-2 This is a top view of the dust collecting hood of the present invention;

[0022] Figure 5-1This is the front view of the waste heat exchange module of the present invention;

[0023] Figure 5-2 This is a side view of the waste heat exchange module of the present invention;

[0024] Figure 5-3 This is a top view of the waste heat exchange module of the present invention;

[0025] Figure 6-1 This is a front view of the focus pushing box of the present invention;

[0026] Figure 6-2 This is a side view of the focus pushing box of the present invention;

[0027] Figure 6-3 This is a top view of the focus pushing box of the present invention;

[0028] Figure 7 This is a schematic diagram of the arrangement of pipes and valves at the volute type centrifugal fan of the present invention;

[0029] Figure 8 This is a schematic diagram of the piping arrangement at the cooling circulating water inlet of the present invention;

[0030] Figure 9-1 This is a front view of the structure of the water-cooled internal wind combustion aid of the present invention;

[0031] Figure 9-2 This is a side view of the structure of the water-cooled internal wind combustion aid of the present invention;

[0032] Figure 9-3 This is a top view of the structure of the water-cooled internal air combustion aid of the present invention;

[0033] Figure 10 This is a schematic diagram of the cooling circulating water storage tank of the present invention;

[0034] Figure 11 This is a schematic diagram of the piping arrangement at the return point of the cooling circulating water of the present invention;

[0035] Figure 12 This is a schematic diagram of the cooling circulating water return manifold of the present invention;

[0036] Figure 13 This is a structural diagram of the guiding and positioning device of the present invention;

[0037] Figure 14 This is a schematic diagram of the guiding and positioning device structure from another angle of the present invention;

[0038] Explanation of the accompanying symbols: 1-coal conveying corridor, 2-inspection robot, 3-top platform, 4-forward and reverse belt conveyors, 5-belt feeding machine, 6-coal storage bin, 7-first fully enclosed electro-hydraulic flat valve, 8-quantitative bin, 9-second fully enclosed electro-hydraulic flat valve, 10-coal conveying box, 11-dust collection hood, 12-common inner cavity, 13-preheating zone, 14-high temperature pyrolysis zone, 15-water-cooled internal wind combustion aid, 16-low temperature cooling zone, 17-furnace body steel platform, 18-first cooling water jacket, 19-straight beam, 20-second cooling water jacket, 21-upper heat exchange module, 22-lower heat exchange module, 23-steam drum, 24-first expansion joint, 25-coke pushing box, 26-coke pushing bed, 27-copper sleeve seal, 28-coke support tray, 29- Guide positioning device, 30-electro-hydraulic push rod, 31-coke collection bin, 32-enclosed scraper, 33-enclosed coke storage bin, 34-enclosed explosion-proof electro-hydraulic flat valve, 35-coke discharge bin, 36-underground corridor, 37-enclosed explosion-proof electro-hydraulic flat gate valve, 38-guide positioning device base, 39-guide positioning wheel, 40-bearing, 41-gas branch pipe, 42-gas branch pipe electric turbine worm butterfly valve, 43-release branch pipe, 44-raw gas release pneumatic quick-cut butterfly valve, 45-raw gas release main pipe, 46-furnace top gas collection single furnace pipeline, 47-first electric blind plate valve, 48-first electric turbine worm butterfly valve, 49-furnace top gas explosion-proof plate, 50-gas main pipeline, 51-gas branch pipeline, 52-second electric blind Plate valve, 53-second electric turbine worm butterfly valve, 54-electric precipitator, 55-gas output pipeline of electric precipitator, 56-electric blind plate valve for gas, 57-electric turbine worm butterfly valve for gas, 58-gas main pipeline after electric precipitator, 59-gas branch pipeline of fan, 60-manual butterfly valve, 61-electric butterfly valve, 62-gas pipeline volute centrifugal fan, 63-motor, 64-pressure cover, 65-positioning ring, 66-shaft, 67-gas output main pipeline to magnesium plant, 68-electric gas switching valve, 69-gas main pipeline to magnesium plant, 70-first pneumatic regulating butterfly valve, 71-mixed coal tar main pipeline, 72-gas output main pipeline to self-supplied power plant, 73-electric switching valve, 74-gas main pipeline to self-supplied power plant Pipeline, 75-second pneumatic regulating butterfly valve, 76-first gas release branch pipe, 77-first gas release pneumatic quick-cut butterfly valve, 78-second gas release branch pipe, 79-second gas release pneumatic quick-cut butterfly valve, 80-positioning rod, 81-VOCs gas auxiliary pipeline, 82-VOCs gas branch pipeline, 83-air inlet expansion joint, 84-volute centrifugal fan, 85-permanent magnet servo motor, 86-second expansion joint, 87-air supply branch pipeline, 88-electric regulating butterfly valve, 89-air supply main pipeline, 90-air supply branch pipeline, 91-electric regulating valve, 92-manual gate valve, 93-air regulating valve, 94-air supply auxiliary pipeline, 95-VOCs gas main pipeline, 96-cooling cycle water inlet pipeline, 97-through auxiliary pipeline,98 - Cooling circulating water storage tank, 99 - Water inlet, 100 - Cooling circulating water branch pipe, 101 - Cooling circulating water control valve, 102 - Sewage cleaning manhole, 103 - Liquid level gauge, 104 - Exhaust pipe and control valve, 105 - Sewage discharge valve and pipe, 106 - Cooling circulating water storage tank base, 107 - Cooling circulating water outlet pipe, 108 - Return water pipe, 109 - Return water manifold, 110 - Carbonization chamber return water pipe, 111 - Temperature detection transmitter, 112 - Control valve, 113 - Return flow auxiliary pipe, 114 - Return water main pipe. DETAILED DESCRIPTION

[0039] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0040] The purpose of the present invention is to provide a granular coal pyrolysis and carbonization device to solve the problems existing in the above-mentioned prior art, thereby improving the coal pyrolysis efficiency and increasing the production capacity.

[0041] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0042] The present invention provides a granular coal pyrolysis and carbonization device, including a high-temperature pyrolysis system, the high-temperature pyrolysis system including a plurality of carbonization chambers arranged in a furnace body, and a waste heat exchange system and a coke discharge system are sequentially arranged below the carbonization chambers; the high-temperature pyrolysis system is externally connected to a clean coal transportation and storage system, the clean coal transportation and storage system is used to transport granular coal to the high-temperature pyrolysis system for pyrolysis, and the high-temperature pyrolysis system is connected to a gas recovery and processing system, which can process and recover the gas generated by the pyrolysis of the granular coal.

[0043] Specifically, such as Figure 1 、 Figure 2 、 Figure 3 、 Figure 4-1 、 Figure 4-2 、 Figure 5-1 、 Figure 5-2 、 Figure 5-3 、 Figure 6-1 、 Figure 6-2 、 Figure 6-3 、 Figure 7 、 Figure 8 、 Figure 9-1 、 Figure 9-2 、 Figure 9-3 、 Figure 10 、 Figure 11 、 Figure 12 、 Figure 13 、 Figure 14 As shown, the present invention deploys an inspection robot 2 in the upper granular coal conveyor corridor 1 to monitor the upper granular coal conveying process at all times. Monitoring cameras are installed at key locations, including the forward and return conveyors 4 on the top platform 3, the belt distributor 5 atop the coal storage bins 6, and monitoring of key areas such as the material level in each coal storage bin 6, control valves, and temperature, pressure, and water levels at each monitoring point. This effectively reduces the number of on-site inspections by employees and mitigates equipment and personnel safety incidents.

[0044] The furnace roof's coal storage bin 6, positioned for distribution to each carbonization chamber, is equipped with a first fully enclosed electro-hydraulic flat valve 7 at its bottom. Below this, a metering bin 8 is located, allowing coal to be deposited into the furnace at a specified time and quantity via a square coal conveyor box 10. A second fully enclosed electro-hydraulic flat valve 9 is installed below metering bin 8, implementing dual-chamber, dual-gate control to prevent the escape of dust and toxic and hazardous gases. The furnace roof is equipped with pressure and temperature detectors and alarms, and each furnace is equipped with a roof explosion-proof plate to ensure safe operation.

[0045] The eight carbonization chambers of the present invention form a furnace, with four carbonization chambers forming a group. Each furnace produces 150,000 tons of semi-coke annually. Each carbonization chamber is divided into three parts: a preheating zone, a high-temperature pyrolysis zone, and a low-temperature cooling zone. The upper preheating zone of each of the four carbonization chambers forms a common inner cavity 12 for preheating the coal entering the furnace. A dust collecting hood 11 is provided at the top of each of the four carbonization chambers to isolate the coal powder produced by the falling coal, and the pyrolysis gas is discharged from the outer side of the dust collecting hood and the inner wall of the common inner cavity to be collected. The coal powder produced by the falling coal and the coal gas produced by the pyrolysis are isolated. This is beneficial to coal gas purification and provides high coal tar quality. The lower part of the preheating zone 13 is the high-temperature pyrolysis zone 14. The high-temperature pyrolysis zone 14 has a built-in water-cooled internal wind combustion aid 15. The head of the water-cooled internal wind combustion aid 15 is located at the lower part of the high-temperature pyrolysis zone 14, and the granular coal is heated and combustion-assisted by adjusting the air volume. Temperature measuring thermocouples are installed in the middle and upper parts of the high-temperature zone for temperature monitoring. This type of furnace does not use recycled coal gas to produce semi-coke, so the quality of the semi-coke is guaranteed and the gas production is large. Below the high-temperature pyrolysis zone 14 is a low-temperature cooling zone 16. The water-cooled internal air combustion aid 15 is placed in the low-temperature cooling zone 16 and extends to the high-temperature pyrolysis zone 14. It is protected by water cooling. The entire device is built with refractory high-alumina bricks and thermal insulation materials. The outside is fully sealed and welded with steel plates and protected by protective furnace columns. The entire furnace body is located above the furnace body steel platform 17. There is a first cooling water jacket 18 at the bottom of the furnace body, and the first cooling water jacket 18 is lined with refractory and wear-resistant materials for protection. The semi-coke formed by pyrolysis enters the inner cavity of the water jacket through the furnace bottom, passes through the water-cooled straight beam 19, and the second cooling water jacket 20 (lined with refractory and wear-resistant materials for protection), and flows into the waste heat exchanger module.

[0046] The high-temperature semi-coke entering the waste heat exchanger module has extremely uneven temperatures. This was tested on the original furnace before the renovation. A 1.5-meter thermocouple was inserted through the inspection hole on the furnace's outer wall at depths of 1.5, 1.35, and 1.2 meters, with each test lasting five minutes. Tests were conducted at different time intervals, and the results are shown in the table below:

[0047]

[0048] Production practice has proven that coal pyrolysis temperatures vary depending on coal quality, furnace type, and production process. Testing has shown that at the same height within the furnace, the 1.5-meter radial level of pyrolyzed lignite is slightly cooler than the 1.35-meter radial level due to proximity to the water-cooled internal air burner 15. The 1.2-meter radial level, closer to the furnace wall, experiences a lower temperature due to water spraying from the scraper cavity, which generates steam, causing charring to fall in the center and escaping upward from all sides. To address this, a waste heat exchange module is employed, consisting of an upper heat exchange module 21, a lower heat exchange module 22, a steam drum 23, a first expansion joint 24, piping, valves, and instrumentation. The upper and lower heat exchange modules 21 and 22 are installed in the same plane, offset horizontally by 1 / 2 relative to each other, while maintaining a certain spacing from the water-cooled walls. After high-temperature pyrolysis, the lignite requires time to gradually cool, requiring a highly controlled process. This technology utilizes a staggered design for waste heat exchange, employing upper and lower heat exchange modules 21 and 22. This allows for natural alternation within the internal cavity, resulting in uniform heat exchange. This results in more efficient heat absorption by the heat exchange module, faster cooling of the blue char, and improved blue char quality. The main design parameters for this waste heat exchange module are: blue char mass flow rate: 20 t / h, blue char inlet temperature: 850°C, blue char outlet temperature: 120-330°C, heat exchange module evaporation capacity: 4.5-5 t / h, rated steam pressure: 4.2 MPa, rated steam temperature: 254.7°C (saturated steam), feedwater temperature: 60°C (provided by the power plant's deaerator), blowdown rate: 3%, and waste heat recovery efficiency: 67.72%. The waste heat is transported to the company's own power plant, where it is superheated in a superheater and then generates electricity. This waste heat utilization reduces the blue char temperature, achieving a dry quenching effect. This not only improves blue char quality but also fully utilizes thermal energy, saving energy and reducing consumption.

[0049] The semi-coke exits the semi-coke waste heat exchange module and enters the coke pusher 25. This technology optimizes the configuration of the coke pusher 25 in the coke discharge system. For every two carbonization chambers, an electro-hydraulic coke pusher is deployed, divided into front and rear coke pushers. Each coke pusher 25 consists of a coke receiving port, a material distributor, a ventilation beam, a copper sleeve seal 27, and a coke support tray 28. They share a coke pusher bed 26, a guide and positioning device 29, and an electro-hydraulic pusher 30. The coke receiving port and material distributor above the coke pusher 25 are protected by refractory insulation materials. The pusher bed is connected to cooling circulating water, and the cooling circulating water volume is regulated by a valve. This not only protects the pusher rods from thermal deformation but also further cools the semi-coke temperature. Each pusher rod is equipped with a copper sleeve seal 27 at the inlet and outlet, and each pusher is equipped with a guide and positioning device 29, which is designed as follows: a guide and positioning device base 38, a guide and positioning wheel 39, a bearing 40, a pressure cover 64, a positioning ring 65, a shaft 66, and a positioning rod 80. A remotely controlled electro-hydraulic push rod 30 is used to power the coke pushing bed 26. After heat exchange in the waste heat exchange module, the semi-coke enters the coke receiving port of the coke pushing box 25, where it is separated to the sides by a material divider. The semi-coke then enters the coke pushing bed 26. Driven by the electro-hydraulic push rod 30, the coke pushing bed 26 continuously reciprocates horizontally, pushing the semi-coke into the closed coke receiving bin 31 and onto the closed scraper 32 at the bottom of the bin. A spraying device is installed on top of the scraper 32. By adjusting the amount of water sprayed, the semi-coke product's moisture content is controlled to meet the product's requirements. The semi-coke is scraped into the closed coke storage bin 33 by the closed scraper 32 and unloaded into the closed coke discharge bin 35 through the closed explosion-proof electro-hydraulic flat valve 34. The coke discharge bin 35 is installed at the top of the underground corridor 36. A closed, explosion-proof electro-hydraulic flat gate valve 37 is installed beneath the coke bin 35. The semi-coke coke from the bin 35 is discharged into a coke conveyor in an underground corridor 36 at a predetermined time. Each coke discharge silo is configured as a dual-chamber, dual-gate system. A VOC gas collection hood is installed near each coke outlet, which pipes the VOCs to a treatment tower for treatment. The coke at the outlet is then transported by a belt conveyor to a coke vibrating screen for classification and delivery to the semi-coke storage. Gas collection and release pipes and valves are installed at the top of the semi-coke furnace in the carbonization chamber. Gas generated during operation is collected through a gas branch pipe 41 on the top of each furnace, which is regulated and controlled by an electric worm gear butterfly valve 42. Each furnace has ten gas collection branch pipes and valves, which merge into the single-furnace gas collection pipe 46 at the top of the furnace. The output end of the top gas collection pipeline 46 for each furnace is equipped with a first electric blind plate valve 47, a first electric worm-gear butterfly valve 48, and a top gas explosion-proof plate 49 to control the gas flow from each furnace. The system consists of four furnaces with an annual semi-coke production capacity of 600,000 tons. Eight electric precipitators are installed, and the purified gas from each of the four precipitators is supplied to two gas-using entities, the magnesium metal plant and the captive power plant. Four precipitators are used for every two furnaces, and each precipitator is equipped with a main gas inlet and outlet pipeline.The coal gas output from each furnace enters the corresponding electric precipitator 54 through the main gas pipeline 50. From there, it flows through the gas branch pipeline 51, passes through the second electric blind plate valve 52 and the second electric turbine worm butterfly valve 53, and enters the electric precipitator 54 at a lower level, where it is purified and coal tar is captured. The purified coal gas is then output through the electric precipitator's gas output pipeline 55, the electric blind plate valve 56, and the electric turbine worm butterfly valve 57 to the main gas pipeline 58 after the electric precipitator is captured. Three gas pipeline volute-type centrifugal fans 62 are installed for every four electric precipitators. The motors are permanent magnet servo-type motors 63, which offer 15% energy savings (two in use and one as a backup). The main gas pipeline after the electric precipitator is connected to the gas branch pipeline 59 of the fan and is equipped with a manual butterfly valve 60 and an electric butterfly valve 61. The gas enters the gas pipeline through the pipeline and enters the air inlet of the volute centrifugal fan 62. The gas is pressurized by the fan and then output through the gas branch pipe at the outlet, the electric butterfly valve at the outlet, and the manual butterfly valve at the outlet. It then enters the gas output main pipeline 67 to the magnesium metal plant and the gas output main pipeline 72 to the self-contained power plant after the electric precipitator. A connecting valve is installed between the two gas output main pipelines. The end of the gas output main pipeline 67 to the magnesium metal plant is equipped with an electric gas switching valve 68, and the end of the gas output main pipeline 72 to the self-contained power plant is equipped with an electric switching valve 73 to switch the gas. This ensures a continuous supply of gas to the magnesium metal plant. The main gas pipeline 69 to the magnesium plant is equipped with a first pneumatically controlled butterfly valve 70. Similarly, the main gas pipeline 74 to the self-contained power plant is equipped with a second pneumatically controlled butterfly valve 75. These are remotely controlled via electric valves to ensure stable gas supply to gas users. Semi-coke production requires raw gas venting during startup and shutdown. Each furnace roof is equipped with eight venting branch pipes 43, four pneumatically controlled quick-cut butterfly valves 44 for raw gas venting, and two raw gas venting main pipes 45 exiting the factory building roof. A first gas release branch pipe 76 and a pneumatically operated quick-cut butterfly valve 77 are installed at the top of the primary gas pipeline to the captive power plant. Similarly, a second gas release branch pipe 78 and a pneumatically operated quick-cut butterfly valve 79 are installed at the top of the primary gas output pipeline to the magnesium plant. These two gas release branches connect to the gas release main pipeline and are transported to a safe location on the gas release pipe, where they are ignited and incinerated by an automatic igniter. The mixed coal tar collected by the electrostatic precipitator is discharged from the mixed coal tar discharge port of the electrostatic precipitator. It then enters a dedicated mixed coal tar water seal for collection through pipes and valves. The collected mixed coal tar then enters the mixed coal tar main pipeline 71 through a pipe, naturally flowing to the mixed coal tar separation tank for dehydration and separation.

[0050] The carbonization room's semi-charcoal furnace's electrostatic precipitator oil-water separation system: After purification and separation by each electrostatic precipitator, the resulting mixed oil flows naturally into each unit's water seal, flows into the mixed oil main pipeline, and then into the oil-water separation unit for oil-water separation. First, utilizing natural head drop, the mixed oil enters a steam-heated oil-water separation tank. After multiple separations, the light oil produced on the upper surface is pumped into a light oil tank for export. The coal tar below the ammonia is pumped into a steam-heated coal tar tank for export. Ammonia produced during the coal tar dehydration process is pumped into a dedicated ammonia collection tank by an ammonia pump. From there, it is pumped into the captive power plant's boiler for incineration. The entire oil-water separation unit is a closed-loop design with ventilation and VOC gas collection, which is then treated in a VOC treatment tower. An ammonia storage tank is located at the captive power plant. Ammonia from the semi-charcoal plant's ammonia collection tank is transported via an ammonia pipeline to the captive power plant's ammonia storage tank for heating. The heat source is waste steam and condensate generated by the boilers, which are piped in from the top of the ammonia storage tanks and transported to the tank heaters. This heats the ammonia, which is then piped out from the top of the tanks, creating a closed-circuit heating system. The heated ammonia is pressurized by an ammonia booster pump on the pipes. The ammonia pipes are equipped with control valves, check valves, and pressure gauges. The ammonia is piped to the walls of Boiler 1 and Boiler 2, each located at a height of 11 meters and with an internal temperature of approximately 800°C. From there, it is injected into the furnaces via pipes and ammonia injection guns. Five ammonia injection guns are installed on each wall of each boiler, spraying the ammonia into the furnaces for incineration. During incineration, the injected ammonia reacts with NOx in the flue gas, contributing to a certain degree of denitrification.

[0051] The water-cooled internal wind combustion aid 15 built into the Muroran charcoal furnace needs to be provided with combustion-supporting gas. This device uses a mixture of air + VOCs gas for combustion-supporting. The volute centrifugal fan 84 has a strong negative pressure at the air inlet, and the treated VOCs gas is transported into the air inlet of the volute centrifugal fan 84, and then the suction pipe is sent to the water-cooled internal wind combustion aid 15 for combustion-supporting incineration. The air supply system is equipped with: a main pipeline 95 for treated VOCs gas, a sub-pipeline 81 for VOCs gas, and an air regulating valve 93 is installed on the VOCs gas branch pipeline 82, which is connected to the air inlet expansion joint 83 of the volute centrifugal fan 84. The installation of the air regulating valve 93 better solves the problem of supplementing the oxygen content when the oxygen content in the VOCs gas is insufficient. The volute centrifugal fan 84 is equipped with a permanent magnet servo motor 85, which can save 15% energy. The outlet of the volute centrifugal fan 84 is equipped with a second expansion joint 86, which connects to the air supply branch pipe 87 and is equipped with a motorized regulating butterfly valve 88. The branch pipes of the two volute centrifugal fans 84 are each integrated into the main air supply pipe 89. Due to the different locations of the air supply points, additional air supply branch pipes 94 are added to provide air to each air supply point. Each air supply branch pipe 90 is equipped with a check valve, a motorized regulating valve 91, and a manual gate valve 92, allowing for remote control based on production and operation conditions.

[0052] The cooling water provided by the semi-coke plant's cooling water pump enters the cooling water inlet pipe 96, passes through a secondary pipe 97, and connects to the water inlet 99 of a cooling water storage tank 98 mounted on a 16.57-meter platform. This tank 98 is equipped with a manhole 102 for cleaning, a level gauge 103, an exhaust pipe and control valve 104, a drain valve and pipe 105, and a cooling water storage tank base 106, providing water for furnace cooling. Each of the eight carbonization chambers has eight built-in water-cooled internal air combustion aids 15, each located above a straight beam 19 beneath the furnace's steel platform 17. The first cooling water jacket 18 is also located above the straight beam 19. Each beam 19 is sealed at both ends with steel plates, through which the ventilation ducts for the water-cooled internal air combustion aids 15 and the cooling water pipes pass. 1 / 2 of each straight beam 19 is blocked, and the second cooling water jacket 20 is welded to the straight beam 19 as a whole, forming two independent water inlet and outlet systems for one straight beam 19. Eight cooling circulating water branches 100 are installed at the bottom of the cooling circulating water storage tank 98, and cooling circulating water control valves 101 are installed on each of them. The eight cooling circulating water branches 100 are connected to the bottom water inlet pipes of the water-cooled internal wind combustion aids 15 of the eight carbonization chambers respectively. The return water coming out of the water outlet pipe at the top of the water-cooled internal wind combustion aid 15 enters the water inlet at the bottom of the first cooling water jacket 18 at the bottom of the furnace. The cooling circulating water coming out of the upper end of the bottom of the first cooling water jacket 18 enters the water inlet on the lower surface of the straight beam 19 and the second cooling water jacket 20, and exits from the upper surface of the straight beam 19 and the second cooling water jacket 20. The cooling circulating water discharged from the water outlet is continuously transported downward to the water inlet of each coke pushing bed 26 push rod to cool the push rod, and is discharged from the water outlet of the coke pushing bed 26 push rod, and is transported upward through the return water pipe 108 to the return water collection box 109 installed on the +11.182 meter platform. The return water collection box 109 is equipped with: return water pipes 110 of each carbonization chamber, temperature detection transmitters 111, and control valves 112. The water is collected and concentrated in the return water collection box and enters the return water main pipe 114 from the return auxiliary pipe 113 to be transported to the cooling tower of the semi-coke plant for cooling, forming a semi-closed cycle for reuse.

[0053] The present invention can realize intelligent remote video monitoring and control, reduce manual operation, and reduce safety accidents; all process equipment adopts fully enclosed design, production and installation to eliminate toxic and harmful spill points. After VOCs gas treatment, it is transported to the semi-coke furnace and incinerated in the boiler of the self-provided power plant to ensure that environmental protection indicators are met and clean production is achieved. The waste heat is fully utilized and the temperature of the semi-coke is reduced, which plays the role of dry quenching, reduces the use of new water, and saves energy. The use of variable frequency control and permanent magnet servo motor can save energy and achieve the purpose of energy saving and consumption reduction; the semi-coke furnace in the carbonization chamber does not require return gas, and the gas production volume is large and can be fully utilized. It is directly equipped with electric capture to purify the gas and recover gas, light oil, and coal tar, which can minimize water consumption. The small amount of ammonia water produced is transported to the boiler of the self-provided power plant for incineration treatment. The entire device adopts DCS centralized control and video monitoring of process parameters and on-site scenes. It also includes: toxic and harmful gas monitoring and alarm; oxygen content monitoring, alarm, VOCs gas control and monitoring.

[0054] In the description of the present invention, it should be noted that the terms "center," "top," "bottom," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the present invention. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0055] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only intended to help understand the method and core concept of the present invention. At the same time, those skilled in the art will find that the specific implementation methods and application scopes may vary based on the concept of the present invention. In summary, the contents of this specification should not be construed as limiting the present invention.

Claims

1. A granular coal pyrolysis and carbonization device, characterized by: It includes a high-temperature pyrolysis system, which includes a plurality of carbonization chambers arranged in the furnace body, and a waste heat exchange system and a coke discharge system are sequentially arranged below the carbonization chambers; the high-temperature pyrolysis system is externally connected to a clean coal transportation and storage system, which is used to transport granular coal to the high-temperature pyrolysis system for pyrolysis, and the clean coal transportation and storage system includes a coal transportation corridor, on which an inspection robot is arranged; a top platform is provided on the top of the furnace body, on which a forward and return belt conveyor and a belt distribution machine are arranged, the end of the coal transportation corridor is located above the forward and return belt conveyors, and a coal storage bin is provided below the belt distribution machine; the coal storage bin The bottom is respectively equipped with a fully enclosed electro-hydraulic flat valve, and a furnace feeding quantitative bin is arranged below the fully enclosed electro-hydraulic flat valve, and a fully enclosed electro-hydraulic flat valve is installed under the quantitative bin. The bottom of the quantitative bin is connected to the carbonization chamber in the furnace body through a coal conveying box; the high-temperature pyrolysis system is connected to a coal gas recovery and treatment system, and the coal gas recovery and treatment system can process and recover the coal gas generated by the pyrolysis of granular coal; the high-temperature pyrolysis system includes eight carbonization chambers arranged in the same furnace body, and the carbonization chamber includes a preheating zone, a high-temperature pyrolysis zone and a low-temperature cooling zone arranged in sequence from top to bottom, and each four carbonization chambers are connected. The preheating area of the chamber forms a common inner cavity, and a dust removal hood is provided at the common inner cavity. The low-temperature cooling area is provided with a built-in water-cooled internal wind combustion aid. The head of the water-cooled internal wind combustion aid is located at the lower part of the high-temperature pyrolysis zone, and can heat the granular coal by adjusting the air volume; the bottom of the furnace body is provided with a first cooling water jacket and a second cooling water jacket in sequence, and a water-cooled straight beam is provided in the second cooling water jacket. The semi-coke formed by pyrolysis in the high-temperature pyrolysis system can enter the waste heat exchange system after passing through the first cooling water jacket inner cavity, the water-cooled straight beam and the second cooling water jacket inner cavity; the waste heat exchange system includes It includes an upper heat exchange module and a lower heat exchange module, the center line of the tube row of the upper heat exchange module and the center line of the tube row of the lower heat exchange module are parallel and are staggered by half of the tube row spacing; the staggered design of the upper and lower heat exchange modules allows the high-temperature pyrolysis blue carbon to naturally alternate in the inner cavity to evenly exchange heat; the bottom of the tube row of the upper heat exchange module and the bottom of the tube row of the lower heat exchange module are respectively provided with a medium inlet, the top of the tube row of the upper heat exchange module and the top of the tube row of the lower heat exchange module are respectively provided with a medium outlet, and heat exchange medium is respectively provided in the tube row of the upper heat exchange module and the tube row of the lower heat exchange module.

2. The granular coal pyrolysis and carbonization device according to claim 1, characterized in that: The coke discharge system includes a coke pushing box, a coke receiving port is provided on the top of the coke pushing box, a material distributor is provided in the coke pushing box, a coke pushing bed is provided below the coke pushing box, a cooling water pipe is connected to the coke pushing bed, one end of the coke pushing bed is connected to an electro-hydraulic push rod, the electro-hydraulic push rod can drive the coke pushing bed to move horizontally back and forth, a closed coke receiving bin is provided below one side of the coke pushing bed, a closed scraper is provided at the bottom of the closed coke receiving bin, a spray device is provided on the top of the closed scraper, the closed scraper is connected to a closed coke storage bin, and the closed coke storage bin is connected to a closed coke discharge bin installed on the top of the underground corridor through a closed explosion-proof electro-hydraulic flat valve; a closed explosion-proof electro-hydraulic flat gate valve is provided under the closed coke discharge bin, which can unload the lignite coke powder in the closed coke discharge bin into the coke powder belt conveyor in the underground corridor for output according to a determined time, and a VOCs gas collection cover is installed at the coke outlet of the closed coke discharge bin.

3. The granular coal pyrolysis and carbonization device according to claim 1, characterized in that: The coal gas recovery and processing system includes a coal gas branch pipe, and the coal gas generated by pyrolysis in the high-temperature pyrolysis system can enter the coal gas branch pipe through the inner wall of the common inner cavity and the outer wall of the dust removal hood; the gas branch pipe is provided with an electric turbine worm butterfly valve, one end of the gas branch pipe is connected to the furnace top coal gas collection single furnace pipeline, the output end of the furnace top coal gas collection single furnace pipeline is equipped with a first electric blind plate valve, a first electric turbine worm butterfly valve and a furnace top coal gas explosion-proof plate, the end of the furnace top coal gas collection single furnace pipeline is connected to the gas main pipeline, and the gas main pipeline is connected to the gas branch pipeline, the second electric blind plate valve and the second electric The turbine worm butterfly valve is connected to the electric precipitator, and the end of the electric precipitator is connected to the main gas pipeline after the electric precipitator through the gas output pipeline, the gas electric blind plate valve, and the gas electric turbine worm butterfly valve; the main gas pipeline after the electric precipitator is connected to the gas branch pipeline of the fan respectively, and is installed with a manual butterfly valve and an electric butterfly valve. The gas enters the air inlet of the volute centrifugal fan through the pipeline connection, is pressurized by the fan, and is output through the gas branch pipe, electric butterfly valve, and manual butterfly valve at the outlet, respectively entering the gas output main pipeline to the metal magnesium plant and the gas output main pipeline to the self-contained power plant after the electric precipitator. A connecting valve is installed between the two gas output main pipelines.

4. The granular coal pyrolysis and carbonization device according to claim 3, characterized in that: The end of the gas output main pipeline to the magnesium plant is equipped with an electric gas switching valve, and the end of the gas output main pipeline to the self-contained power plant is equipped with an electric switching valve. The gas main pipeline to the magnesium plant and the gas main pipeline to the self-contained power plant are both equipped with pneumatic regulating butterfly valves; the top of each furnace body is equipped with a venting branch pipe, a pneumatic quick-cut butterfly valve for raw gas venting and a raw gas venting main pipe; a gas venting branch pipe and a gas venting pneumatic quick-cut butterfly valve are installed at the top of the initial end of the gas main pipeline to the self-contained power plant and the top of the initial end of the gas output main pipeline to the magnesium plant respectively. The two gas venting branches are connected to the gas venting main pipeline, transported to a safe position of the gas venting pipe, and ignited and burned by an automatic igniter.

5. The granular coal pyrolysis and carbonization device according to claim 1, characterized in that: The combustion-supporting gas of the water-cooled internal air combustion-supporting device is a mixture of air and VOCs gas; a volute-type centrifugal blower is provided on one side of the furnace body, and the volute-type centrifugal blower delivers combustion-supporting air to the built-in water-cooled internal air combustion-supporting device in each carbonization chamber through air ducts and electric regulating valves.

6. The granular coal pyrolysis and carbonization device according to claim 1, characterized in that: A cooling water circulation system is provided in the carbonization chamber, which includes a cooling circulating water pump. The cooling circulating water pump is connected in sequence to a cooling circulating water pipeline and a secondary pipeline cooling circulating water storage tank. The circulating water storage tank is equipped with a sewage manhole, a liquid level gauge, an exhaust pipe and a control valve, a sewage valve and pipeline, and a cooling circulating water storage tank base. The cooling circulating water branches of the cooling circulating water storage tank are respectively installed with control valves, which are respectively connected to the water inlet pipe at the bottom of the water-cooled internal wind combustion aid in the carbonization chamber.

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