Belt type roasting system adopting solid fuel

Abstract

The invention provides a belt type roasting system adopting solid fuel, which comprises a heat supply device used for combusting the solid fuel to generate high-temperature flue gas, and a heat supply assembly is provided with a flue gas output end used for outputting the high-temperature flue gas; the roasting device comprises a belt type conveying part and a furnace body part, the furnace body part is provided with a drying section, a preheating section and a roasting section, the drying section, the preheating section and the roasting section are arranged in the conveying direction of the belt type conveying part, the preheating section is located between the drying section and the roasting section, and the smoke inlet end of the preheating section and the smoke inlet end of the roasting section are both communicated with the smoke output end. And the smoke exhaust end of the roasting section is communicated with the smoke inlet end of the drying section. The belt type roasting system adopting the solid fuel is suitable for being applied to areas with rich solid fuel resources, the use cost of the belt type roasting system in the areas can be reduced, and the application range of the belt type roasting system is expanded.

Description

Technical Field

[0001] The present disclosure relates to the technical field of pellet roasting, and in particular, to a belt roasting system using solid fuel. Background Art

[0002] In related technologies, most belt roasting equipment provides heat for material roasting by burning gaseous fuel. Therefore, in regions where gaseous fuel resources are relatively scarce while solid fuel resources are relatively abundant, the use cost of belt roasting equipment is relatively high, severely limiting the application scope of belt roasting equipment and being unfavorable for the wide application of belt roasting equipment. Summary of the Invention

[0003] The present disclosure aims to at least solve one of the technical problems existing in the prior art or related technologies.

[0004] In view of this, according to an embodiment of the present disclosure, a belt roasting system using solid fuel is provided, including:

[0005] A heat supply device for burning solid fuel to generate high-temperature flue gas, the heat supply assembly having a flue gas output end for outputting high-temperature flue gas;

[0006] A roasting device including a belt conveying part and a furnace body part, the furnace body part having a drying section, a preheating section, and a roasting section, the drying section, the preheating section, and the roasting section being arranged along the conveying direction of the belt conveying part, the preheating section being located between the drying section and the roasting section, the flue gas inlet end of the preheating section and the flue gas inlet end of the roasting section both being communicated with the flue gas output end, and the flue gas outlet end of the roasting section being communicated with the flue gas inlet end of the drying section.

[0007] In a feasible embodiment, the heat supply device includes:

[0008] A powder making part for processing solid fuel into powdery fuel to be burned;

[0009] A hot blast stove having a flue gas output end and a combustion chamber communicated with the flue gas output end;

[0010] A combustion part arranged in the hot blast stove for burning the fuel to be burned to generate high-temperature flue gas in the combustion chamber;

[0011] A blowing part connected between the powder making part and the combustion part for blowing the fuel to be burned to the combustion part.

[0012] In a feasible embodiment, the heat supply device further includes:

[0013] A first gas supply part for supplying protective gas to the powder making part, the combustion part, and the blowing part.

[0014] In a feasible embodiment, the heat supply device further includes:

[0015] The second gas supply part is connected to the combustion part and is used for supplying combustion-supporting gas to the combustion part.

[0016] In a feasible implementation manner, the second air supply unit includes:

[0017] First fan;

[0018] a first pipeline, connected between the first fan and the combustion part, the first fan is used to supply air to the combustion part through the first pipeline;

[0019] The second pipeline is used to communicate between the combustion part and the oxygen supply system.

[0020] In a feasible implementation, the furnace body further comprises a soaking section, and along the conveying direction of the belt conveyor, the soaking section is located on the side of the roasting section away from the preheating section, and the belt roasting system using solid fuel further comprises:

[0021] A third pipeline is connected between the smoke output end and the smoke inlet end of the preheating section;

[0022] The fourth pipeline is connected between the smoke output end and the smoke inlet end of the roasting section;

[0023] The fifth pipeline, the smoke exhaust end of the roasting section and the smoke exhaust end of the soaking section are both connected to the smoke inlet end of the drying section through the fifth pipeline;

[0024] a sixth pipeline connected between the fifth pipeline and the third pipeline;

[0025] The heat exchange device is connected with the first pipeline and the sixth pipeline by heat transfer through the heat exchange device.

[0026] In a feasible embodiment, the belt roasting system using solid fuel further includes:

[0027] The air supply device is used to supply air to the third pipeline and the fourth pipeline.

[0028] In a feasible implementation manner, the gas supply device includes:

[0029] Second fan;

[0030] a seventh pipeline connected between the second fan and the third pipeline;

[0031] The eighth pipeline is connected between the second fan and the fourth pipeline.

[0032] In a feasible embodiment, the belt roasting system using solid fuel further includes:

[0033] The dust removal device is connected to the smoke exhaust end of the drying section and the smoke exhaust end of the preheating section.

[0034] In a feasible implementation manner, the dust removal device includes:

[0035] The ninth pipeline, the smoke exhaust ends of both the drying section and the preheating section are used to communicate with the flue gas treatment system through the ninth pipeline;

[0036] The dust removal part is arranged in the ninth pipeline and is used for dust removal treatment of the flue gas in the ninth pipeline;

[0037] The third fan is arranged in the ninth pipeline and is used to drive the flue gas in the ninth pipeline to flow in the direction from the smoke inlet end of the dust removal part to the smoke exhaust end of the dust removal part.

[0038] The above description is only an overview of the technical solution provided by the present disclosure. In order to be able to understand the technical means of the present disclosure more clearly, it can be implemented according to the content of the specification. And in order to make the above and other features and effects of the present disclosure more obvious and understandable, the following specifically gives the embodiments of the present disclosure. Description of the Drawings

[0039] By reading the detailed description of the exemplary embodiments below, various other advantages and benefits will become clear to those of ordinary skill in the art. The drawings are only for the purpose of showing the exemplary embodiments and are not considered to be a limitation of the present disclosure. And throughout the drawings, the same reference numerals are used to represent the same components. In the drawings:

[0040] Figure 1 It is a schematic structural diagram of a belt roasting system using solid fuel according to an embodiment provided by the present disclosure.

[0041] Among them, Figure 1 The corresponding relationship between the reference numerals in the drawings and the component names is as follows:

[0042] 100 Heating device; 110 Coal pulverizing section; 120 Hot blast stove; 130 Combustion section; 140 Blowing section; 150 First air supply section; 151 Tenth pipeline; 152 First butterfly valve; 160 Second air supply section; 161 First fan; 162 First pipeline; 163 Second pipeline; 164 Second butterfly valve;

[0043] 200 Roasting device; 210 Belt conveying section; 211 Feeding area; 212 Discharging area; 220 Furnace body section; 221 Drying end; 222 Drying section; 223 Preheating section; 224 Roasting section; 225 Soaking section; 226 First cooling section; 227 Second cooling section;

[0044] 300 Third pipeline; 301 Third butterfly valve;

[0045] 400 Fourth pipeline; 401 Fourth butterfly valve;

[0046] 500 Fifth pipeline; 501 Fifth butterfly valve; 502 Fourth fan;

[0047] 600 The sixth pipeline; 601 The sixth butterfly valve;

[0048] 700 Heat exchange device;

[0049] 800 Gas supply device; 810 The second fan; 820 The seventh pipeline; 8201 The seventh butterfly valve; 830 The eighth pipeline; 8301 The eighth butterfly valve;

[0050] 900 Dust removal device; 910 The ninth pipeline; 920 Dust removal part; 930 The third fan. Detailed implementation mode

[0051] Hereinafter, exemplary embodiments of the present disclosure will be described in more detail with reference to the accompanying drawings. Although the exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided so that the present disclosure can be more thoroughly understood and the scope of the present disclosure can be completely conveyed to those skilled in the art.

[0052] As Figure 1 shown, according to an embodiment of the present disclosure, a belt roasting system using solid fuel is proposed, including: a heating device 100 for burning solid fuel to generate high-temperature flue gas, the heating assembly having a flue gas output end for outputting high-temperature flue gas; a roasting device 200 including a belt conveying part 210 and a furnace body part 220, the furnace body part 220 having a drying section 222, a preheating section 223 and a roasting section 224, the drying section 222, the preheating section 223 and the roasting section 224 being arranged along the conveying direction of the belt conveying part 210, the preheating section 223 being located between the drying section 222 and the roasting section 224, the smoke inlet ends of the preheating section 223 and the roasting section 224 being both connected to the flue gas output end, and the smoke exhaust end of the roasting section 224 being connected to the smoke inlet end of the drying section 222.

[0053] The belt roasting system using solid fuel provided by the present disclosure includes the aforementioned heating device 100 and the aforementioned roasting device 200. Based on the foregoing settings, the belt roasting system can utilize the roasting device 200 to provide a space for the roasting process of the material to be roasted. Correspondingly, the belt conveying part 210 of the roasting device 200 can be used to convey the aforementioned material to be roasted, so that the material to be roasted passes through multiple process sections of the furnace body part 220 in sequence. The aforementioned multiple process sections include but are not limited to the aforementioned drying section 222, preheating section 223, and roasting section 224, thereby facilitating the material to be roasted to receive different process treatments in a relatively continuous manner; the heating device 100 can be used to burn solid fuel to generate high-temperature flue gas, and can supply the high-temperature flue gas to the preheating section 223 and roasting section 224 of the furnace body part 220 through the aforementioned flue gas output end, so as to preheat and roast the material to be roasted by using the heat of the high-temperature flue gas. Moreover, the heating device 100 can generate the aforementioned high-temperature flue gas by burning solid fuel, so it is suitable for application in areas rich in solid fuel resources, which is beneficial to reducing the use cost of the belt roasting system in the aforementioned areas, and further expanding the application scope of the belt roasting system; the smoke exhaust end of the aforementioned roasting section 224 can be connected to the smoke inlet end of the drying section 222, so that the flue gas discharged from the roasting section 224 can be supplied to the drying section 222, and the flue gas of the roasting section 224 can be reused to dry the material to be roasted in the drying section 222 by using the waste heat of the flue gas of the roasting section 224, which is beneficial to improving the heat utilization efficiency of the belt roasting system, reducing the heat loss and fuel consumption of the belt roasting system, enhancing the energy-saving and environmental protection performance of the belt roasting system, and further saving the use cost of the belt roasting system.

[0054] It can be understood that the aforementioned solid fuel can include but is not limited to one or more of solid fuels such as coal, coke, and biofuels.

[0055] It can be understood that the aforementioned material to be roasted can be but is not limited to green balls.

[0056] It can be understood that the foregoing belt conveying section 210 may include a belt conveyor, which has a feeding area 211 and a discharging area 212. The foregoing feeding area 211 and the foregoing discharging area 212 respectively correspond to two ends in the extending direction of the belt conveyor, and the conveying direction of the belt conveying section 210 may be from the foregoing feeding area 211 to the foregoing discharging area 212. In practical applications, the foregoing furnace body section 220 may be a cover structure arranged above the belt conveyor. The interior of the cover is divided into a plurality of the foregoing process sections by partition walls. The plurality of the foregoing process sections may further include a drying section 221, a soaking section 225, a first cooling section 226, and a second cooling section 227. Along the foregoing conveying direction, the drying section 221, the draining section 222, the preheating section 223, the roasting section 224, the soaking section 225, the first cooling section 226, and the second cooling section 227 are arranged in sequence; the material to be roasted can receive blowing drying treatment and suction drying treatment in the drying section 221 and the draining section 222 respectively during the process of moving along the conveying direction, and then be preheated in the preheating section 223, and then receive roasting treatment and soaking treatment in the roasting section 224 and the soaking section 225 respectively, and finally be cooled through the first cooling section 226 and the second cooling section 227 in sequence to obtain roasted pellets.

[0057] As Figure 1 shown, in some examples, the heating device 100 includes: a powder making section 110 for processing solid fuel into powdery fuel to be burned; a hot blast stove 120 having a flue gas output end and a combustion chamber communicated with the flue gas output end; a combustion section 130 arranged in the hot blast stove 120 for burning the fuel to be burned to generate high-temperature flue gas in the combustion chamber; a blowing section 140 connected between the powder making section 110 and the combustion section 130 for blowing the fuel to be burned to the combustion section 130.

[0058] In this technical solution, the heating device 100 may include the foregoing powder making section 110, hot blast stove 120, combustion section 130, and blowing section 140; based on the foregoing settings, the heating device 100 can use the powder making section 110 to make relatively large-scale blocky or granular solid fuel into powdery fuel to be burned that is continuously relatively fine, thereby facilitating the full combustion of the fuel and improving the utilization rate of solid fuel. Correspondingly, the fuel to be burned produced by the powder making section 110 can be blown by the blowing section 140 to the combustion section 130. During the blowing process, the fuel to be burned can be mixed and dispersed with gas, which is conducive to the full combustion of the fuel to be burned by the combustion section 130. The combustion chamber of the hot blast stove 120 can provide space for the combustion of the foregoing fuel to be burned to accommodate the foregoing high-temperature flue gas generated by combustion, and can supply the foregoing high-temperature flue gas to the foregoing preheating section 223 and the foregoing roasting section 224 to provide the heat required for preheating treatment and roasting treatment.

[0059] As Figure 1As shown, in some examples, the heating device 100 further includes: a first gas supply unit 150 for supplying a protective gas to the pulverizing unit 110, the combustion unit 130, and the blowing unit 140.

[0060] In this technical solution, the heating device 100 may further include the aforementioned first gas supply unit 150; based on the aforementioned arrangement, the heating device 100 can use the first gas supply unit 150 to transport the protective gas to the pulverizing unit 110, the combustion unit 130, and the blowing unit 140, so as to reduce the risk of combustion or explosion of the powder to be burned during preparation or transfer, and improve the safety and reliability of the heating device 100.

[0061] Exemplarily, the aforementioned protective gas may be nitrogen.

[0062] Exemplarily, the first gas supply unit 150 may include a tenth pipeline 151 and a first butterfly valve 152; wherein, the tenth pipeline 151 may include a main protective gas pipeline and a plurality of protective gas branch pipelines. One end of the main protective gas pipeline is used to connect to the protective gas supply system, and a plurality of protective gas branch pipelines are all communicated with the other end of the main protective gas pipeline. The aforementioned pulverizing unit 110, combustion unit 130, and blowing unit 140 are respectively communicated with at least one of the aforementioned protective gas branch pipelines, and a first butterfly valve 152 is provided on each of the aforementioned protective gas branch pipelines. The first butterfly valve 152 is used to adjust the gas flow rate in the protective gas branch pipeline. The aforementioned first butterfly valve 152 may be an electric butterfly valve.

[0063] As Figure 1 shown, in some examples, the heating device 100 further includes: a second gas supply unit 160 communicated with the combustion unit 130 for supplying a combustion-supporting gas to the combustion unit 130.

[0064] In this technical solution, the heating device 100 may further include the aforementioned second gas supply unit 160; based on the aforementioned arrangement, the heating device 100 can use the second gas supply unit 160 to transport the protective gas to the combustion unit 130, so as to ensure the combustion efficiency and combustion effect of the powder to be burned, which is beneficial to ensuring the full combustion of the powder to be burned, and then ensuring the generation amount of the aforementioned high-temperature flue gas and improving the heat output efficiency of the heating device 100.

[0065] It can be understood that the aforementioned combustion-supporting gas may be, but is not limited to, air and / or oxygen.

[0066] As Figure 1 shown, in some examples, the second gas supply unit 160 includes: a first blower 161; a first pipeline 162 communicated between the first blower 161 and the combustion unit 130, and the first blower 161 is used to supply air to the combustion unit 130 through the first pipeline 162; a second pipeline 163 for communicating between the combustion unit 130 and the oxygen supply system.

[0067] In this technical solution, the second air supply part 160 may include the aforementioned first blower 161, the first pipeline 162 and the second pipeline 163; based on the aforementioned settings, the second air supply part 160 can be connected to the oxygen supply system through the second pipeline 163, and the oxygen output by the oxygen supply system can be supplied to the combustion part 130 through the second pipeline 163, so that the powder to be burned is mixed with oxygen, which is conducive to realizing the oxygen-enriched combustion of the powder to be burned, increasing the upper limit of the fuel temperature, providing a reliable guarantee for the full combustion and utilization of solid fuel, and further improving the roasting heat supply effect; the first blower 161 can convey air to the combustion part 130 through the first pipeline 162, so as to balance the oxygen content during fuel combustion while using air to assist the combustion of the powder to be burned, which is conducive to ensuring the stable and efficient combustion of the powder to be burned.

[0068] Exemplarily, a second butterfly valve 164 may further be provided on the aforementioned first pipeline 162, so that the air flow rate in the second pipeline 163 can be regulated by using the second butterfly valve 164, which is conducive to adjusting the oxygen content during the combustion of the powder to be burned; the aforementioned oxygen content may be greater than or equal to 35% and less than or equal to 40%, which is conducive to ensuring the full combustion of the powder to be burned and increasing the upper limit temperature of the fuel to 1500 °C. The aforementioned second butterfly valve 164 may be an electric butterfly valve.

[0069] As Figure 1 shown, in some examples, the furnace body part 220 further has a soaking section 225. Along the conveying direction of the belt conveying part 210, the soaking section 225 is located on the side of the roasting section 224 away from the preheating section 223. The belt roasting system using solid fuel further includes: a third pipeline 300, which is communicated between the flue gas output end and the smoke inlet end of the preheating section 223; a fourth pipeline 400, which is communicated between the flue gas output end and the smoke inlet end of the roasting section 224; a fifth pipeline 500, the smoke exhaust ends of the roasting section 224 and the soaking section 225 are both communicated with the smoke inlet end of the drying section 222 through the fifth pipeline 500; a sixth pipeline 600, which is communicated between the fifth pipeline 500 and the third pipeline 300; a heat exchange device 700, the first pipeline 162 and the sixth pipeline 600 are heat transfer connected through the heat exchange device 700.

[0070] In this technical solution, the furnace body part 220 may further have the aforementioned soaking section 225. The belt roasting system using solid fuel may further include the aforementioned third pipeline 300, fourth pipeline 400, fifth pipeline 500, sixth pipeline 600 and heat exchange device 700; based on the aforementioned settings, the flue gas output end of the hot blast stove 120 can respectively transport high-temperature flue gas to the aforementioned preheating section 223 and the aforementioned roasting section 224 through the third pipeline 300 and the fourth pipeline 400, so as to provide heat for the preheating and roasting treatment of the materials to be roasted; after the flue gas in the roasting section 224 and the soaking section 225 is discharged, it can be transported to the drying section 222 through the aforementioned fifth pipeline 500, so as to dry the materials to be roasted in the drying section 222, thereby reducing the humidity of the materials to be roasted, facilitating the subsequent preheating of the materials to be roasted, and by using the waste heat of the flue gas in the roasting section 224 and the preheating section 223 for material drying, it is beneficial to reduce the energy consumed in the drying process and further save the use cost of the belt roasting system; a part of the flue gas in the fifth pipeline 500 can flow into the third pipeline 300 through the sixth pipeline 600, and the sixth pipeline 600 and the first pipeline 162 of the second air supply part can exchange heat through a heat exchanger, so that the heat of the flue gas in the sixth pipeline 600 can be used to heat the air in the first pipeline 162, so as to increase the temperature of the air, improve the combustion-supporting effect on the powder to be burned, and can reduce the temperature of the flue gas in the sixth pipeline 600, so that after the flue gas in the sixth pipeline 600 is mixed with the high-temperature flue gas in the third pipeline 300, the temperature of the flue gas in the third pipeline 300 can be adjusted, thus facilitating the realization of the waste heat temperature control of the preheating section 223 and being beneficial to further improving the preheating effect.

[0071] Exemplarily, a third butterfly valve 301 may be provided on the foregoing third pipeline 300. The third butterfly valve 301 is located between one end where the sixth pipeline 600 is connected to the third pipeline 300 and the flue gas output end. A fourth butterfly valve 401 may be provided on the foregoing fourth pipeline 400. A fifth butterfly valve 501 and a fourth fan 502 may be provided on the foregoing fifth pipeline 500. The fifth butterfly valve 501 is located between one end where the sixth pipeline 600 is connected to the fifth pipeline 500 and the flue gas inlet end of the drying section 222. The fourth fan 502 is located upstream of one end where the sixth pipeline 600 is connected to the fifth pipeline 500, and is used to drive the flue gas in the fifth pipeline 500 to flow from the flue gas exhaust ends of the roasting section 224 and the soaking section 225 towards the fifth butterfly valve 501 and the sixth pipeline 600. A sixth butterfly valve 601 may be provided on the sixth pipeline 600. Based on the foregoing settings, it is convenient to regulate the flue gas flow in the corresponding pipelines respectively through the third butterfly valve 301, the fourth butterfly valve 401, the fifth butterfly valve 501 and the sixth butterfly valve 601, so as to facilitate the regulation of the flue gas temperature in the third pipeline 300, the regulation of the heat supply amount to the roasting section 224, the regulation of the flue gas supply amount to the drying section 222, and the regulation of the heat exchange efficiency between the first pipeline 162 and the sixth pipeline 600, thereby improving the use flexibility and control convenience of the belt roasting system.

[0072] Exemplarily, the foregoing third butterfly valve 301, fourth butterfly valve 401 and fifth butterfly valve 501 may be high-temperature electric butterfly valves; the foregoing sixth butterfly valve 601 may be an electric butterfly valve.

[0073] Exemplarily, the flow rates of the first pipeline 162 and the sixth pipeline 600 may be regulated by adjusting the foregoing second butterfly valve 164 and the foregoing sixth butterfly valve 601, so that the temperature of the air in the first pipeline 162 after heat exchange is about 300 °C, for example, within the range of 290 °C - 310 °C, thereby improving the combustion-supporting effect on the powder to be burned. It can be understood that in practical applications, the flue gas temperature discharged from the roasting section 224 and the soaking section 225 is usually about 400 °C, which can provide the required heat for increasing the temperature of the air in the first pipeline 162 through the heat exchange device 700, and can be mixed with the high-temperature flue gas in the third pipeline 300 after heat exchange to lower the flue gas temperature supplied from the third pipeline 300 to the preheating section 223.

[0074] Exemplarily, the foregoing third pipeline 300 may include a main smoke supply pipeline and a preheating smoke supply branch pipeline. One end of the main smoke supply pipeline is communicated with the foregoing flue gas output end. The preheating smoke supply branch pipeline is connected between the other end of the main smoke supply pipeline and the smoke inlet end of the preheating section 223. The number of the preheating smoke supply branch pipelines may be multiple, and may be specifically set according to actual requirements. The foregoing fourth pipeline 400 may include roasting smoke supply branch pipelines. The number of the roasting smoke supply branch pipelines may be multiple, and may be specifically set according to actual requirements. The foregoing third butterfly valve 301 may correspond to the foregoing preheating smoke supply branch pipelines one by one. The foregoing fourth butterfly valve 401 may correspond to the foregoing roasting smoke supply branch pipelines one by one. The foregoing sixth pipeline 600 may include a main smoke return pipeline and a smoke return branch pipeline. One end of the main smoke return pipeline is communicated with the fifth pipeline 500. The smoke return branch pipeline is connected between the other end of the main smoke return pipeline and the preheating smoke supply branch pipelines. The foregoing smoke return branch pipelines correspond to the foregoing preheating smoke supply branch pipelines one by one. The foregoing main smoke return pipeline is heat-transfer connected to the first pipeline 162 through a heat exchange device 700. The foregoing sixth butterfly valve 601 may be arranged on the foregoing main smoke return pipeline.

[0075] As Figure 1 shown, in some examples, the belt roasting system using solid fuel further includes: a gas supply device 800 for supplying air to the third pipeline 300 and the fourth pipeline 400.

[0076] In this technical solution, the belt roasting system using solid fuel may further include the foregoing gas supply device 800. Based on the foregoing setting, the foregoing belt roasting system may inject air into the third pipeline 300 and the fourth pipeline 400 through the gas supply device 800, so as to adjust the flue gas temperature in the third pipeline 300 and the fourth pipeline 400 by mixing air into the high-temperature flue gas, thereby facilitating the adjustment of the heat supply amount to the preheating section 223 and the roasting section 224, and further improving the use flexibility and control convenience of the belt roasting system.

[0077] As Figure 1 shown, in some examples, the gas supply device 800 includes: a second blower 810; a seventh pipeline 820 communicated between the second blower 810 and the third pipeline 300; an eighth pipeline 830 communicated between the second blower 810 and the fourth pipeline 400.

[0078] In this technical solution, the gas supply device 800 may include the foregoing second blower 810, seventh pipeline 820 and eighth pipeline 830. Based on the foregoing setting, the gas supply device 800 may use the second blower 810 to inhale air in the external environment and inject air into the foregoing third pipeline 300 and the fourth pipeline 400 through the foregoing seventh pipeline 820 and eighth pipeline 830 respectively, so as to adjust the flue gas temperature in the third pipeline 300 and the fourth pipeline 400, thereby facilitating the adjustment of the heat supply amount to the preheating section 223 and the roasting section 224.

[0079] Exemplarily, one end of the seventh pipeline 820 connected to the third pipeline 300 may be located between the end of the aforementioned sixth pipeline 600 connected to the third pipeline 300 and the flue gas inlet end of the preheating section 223, and one end of the eighth pipeline 830 connected to the fourth pipeline 400 may be located between the aforementioned fourth butterfly valve 401 and the flue gas inlet end of the roasting section 224. Accordingly, a seventh butterfly valve 8201 is provided on the seventh pipeline 820, and an eighth butterfly valve 8301 is provided on the eighth pipeline 830. Based on the aforementioned settings, it is convenient to adjust the flue gas temperature of the third pipeline 300 flowing into the preheating section 223 by adjusting the third butterfly valve 301, the sixth butterfly valve 601 and the seventh butterfly valve 8201, and it is convenient to adjust the flue gas temperature of the fourth pipeline 400 flowing into the roasting section 224 by adjusting the fourth butterfly valve 401 and the eighth butterfly valve 8301, which is conducive to realizing the control of the heat supply to the preheating section 223 and the roasting section 224.

[0080] Exemplarily, the aforementioned seventh pipeline 820 may include an air supply main pipe and a first air supply branch pipe. One end of the air supply main pipe communicates with the aforementioned second blower 810. The first air branch pipe is connected between the other end of the air supply main pipe and the aforementioned third pipeline 300. The aforementioned first air supply branch pipe may have the same number as and correspond one-to-one with the preheating flue gas supply branch pipes. The aforementioned seventh butterfly valve 8201 is provided on the first air supply branch pipe and corresponds one-to-one with the first air supply branch pipe. The aforementioned eighth pipeline 830 may include a second air branch pipe. The second air branch pipe is connected between the other end of the air supply main pipe and the aforementioned fourth pipeline 400. The aforementioned second air supply branch pipe may have the same number as and correspond one-to-one with the roasting flue gas supply branch pipes. The aforementioned eighth butterfly valve 8301 is provided on the second air supply branch pipe and corresponds one-to-one with the second air supply branch pipe.

[0081] Exemplarily, the aforementioned seventh butterfly valve 8201 and the aforementioned eighth butterfly valve 8301 may be electric butterfly valves.

[0082] As Figure 1 shown, in some examples, the belt roasting system using solid fuel further includes: a dust removal device 900. The flue gas outlet ends of the drying section 222 and the preheating section 223 are both communicated with the dust removal device 900.

[0083] In this technical solution, the belt roasting system using solid fuel may further include the aforementioned dust removal device 900. Based on the aforementioned settings, after the flue gas in the drying section 222 and the preheating section 223 is discharged, it can be treated by the dust removal device 900, thereby reducing the dust content of the flue gas, which is conducive to subsequent purification treatment of the flue gas and improving the cleanliness and environmental protection of the belt roasting system.

[0084] As Figure 1 shown, in some examples, the dust removal device 900 includes:

[0085] The ninth pipeline 910, the smoke exhaust ends of the drying section 222 and the preheating section 223 are both used to communicate with the flue gas treatment system through the ninth pipeline 910;

[0086] The dust removal part 920 is arranged in the ninth pipeline 910 and is used for dust removal treatment of the flue gas in the ninth pipeline 910;

[0087] The third fan 930 is arranged in the ninth pipeline 910 and is used to drive the flue gas in the ninth pipeline 910 to flow in the direction from the smoke inlet end of the dust removal part 920 to the smoke exhaust end of the dust removal part 920.

[0088] In this technical solution, the dust removal device 900 may include the aforementioned ninth pipeline 910, the dust removal part 920 and the third fan 930; based on the aforementioned settings, the dust removal device 900 can use the third fan 930 to provide power for the discharge of the flue gas in the drying section 222 and the preheating section 223, so that the flue gas flows into the dust removal part 920, which is beneficial to improving the flue gas discharge efficiency in the drying section 222 and the preheating section 223, and enhancing the dust removal efficiency of the flue gas in the drying section 222 and the preheating section 223. Correspondingly, the ninth pipeline 910 can be used to communicate with the flue gas treatment system to facilitate the supply of the dust-removed flue gas to the flue gas treatment system for further purification treatment.

[0089] Exemplarily, the aforementioned dust removal cloth may include a filter.

[0090] In the present disclosure, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance; the term "plurality" means two or more, unless otherwise clearly defined. Terms such as "installed", "connected", "connected to", "fixed" and other terms should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; "connected" can be a direct connection or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present disclosure can be understood according to specific circumstances.

[0091] In the description of the present disclosure, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "front", "rear", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present disclosure and simplifying the description, rather than indicating or implying that the device or unit referred to must have a specific direction, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation of the present disclosure.

[0092] In the description of this specification, the descriptions of the terms "one embodiment", "some embodiments", "specific embodiments", etc. mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present disclosure. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or instance. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0093] The above are only the preferred embodiments of the present disclosure and are not intended to limit the present disclosure. For those skilled in the art, various changes and modifications can be made to the present disclosure. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present disclosure shall be included within the protection scope of the present disclosure.

Claims

1. A belt roasting system using solid fuel, characterized in that: include: A heating device, used for burning solid fuel to generate high-temperature flue gas, the heating component having a flue gas output end, the flue gas output end being used for outputting the high-temperature flue gas; A roasting device comprises a belt conveyor portion and a furnace body portion, wherein the furnace body portion comprises a draining section, a preheating section and a roasting section, wherein the draining section, the preheating section and the roasting section are arranged along the conveying direction of the belt conveyor portion, the preheating section is located between the draining section and the roasting section, the smoke inlet end of the preheating section and the smoke inlet end of the roasting section are both connected to the smoke output end, and the smoke exhaust end of the roasting section is connected to the smoke inlet end of the draining section.

2. The belt roasting system using solid fuel according to claim 1, characterized in that: The heating device comprises: A powder making section, used for processing the solid fuel into powdered material to be burned; A hot blast stove having the smoke output end and a combustion chamber connected to the smoke output end; A combustion unit, arranged in the hot blast furnace, for burning the powder to be burned to generate the high-temperature flue gas in the combustion chamber; The blowing part is connected between the powder making part and the combustion part, and is used for blowing the powder to be burned to the combustion part.

3. The belt roasting system using solid fuel according to claim 2, characterized in that: The heating device also includes: The first gas supply part is used to supply protective gas to the powder making part, the combustion part and the blowing part.

4. The belt roasting system using solid fuel according to claim 2, characterized in that: The heating device also includes: The second gas supply part is connected to the combustion part and is used for supplying combustion-supporting gas to the combustion part.

5. The belt roasting system using solid fuel according to claim 4, characterized in that: The second air supply unit comprises: First fan; a first pipeline, connected between the first fan and the combustion part, the first fan is used to supply air to the combustion part through the first pipeline; The second pipeline is used to communicate between the combustion part and the oxygen supply system.

6. The belt roasting system using solid fuel according to claim 5, characterized in that: The furnace body also has a soaking section, and along the conveying direction of the belt conveyor, the soaking section is located on a side of the roasting section away from the preheating section. The belt roasting system using solid fuel also includes: A third pipeline is connected between the smoke output end and the smoke inlet end of the preheating section; a fourth pipeline connected between the smoke output end and the smoke inlet end of the roasting section; A fifth pipeline, through which the smoke exhaust end of the roasting section and the smoke exhaust end of the soaking section are both connected to the smoke inlet end of the extraction section; a sixth pipeline, connected between the fifth pipeline and the third pipeline; A heat exchange device, wherein the first pipeline and the sixth pipeline are connected in heat transfer via the heat exchange device.

7. The belt roasting system using solid fuel according to claim 6, characterized in that: Also includes: An air supply device is used to supply air to the third pipeline and the fourth pipeline.

8. The belt roasting system using solid fuel according to claim 7, characterized in that: The gas supply device comprises: Second fan; a seventh pipeline, connected between the second fan and the third pipeline; An eighth pipeline is connected between the second fan and the fourth pipeline.

9. The belt roasting system using solid fuel according to any one of claims 1 to 8, characterized in that: Also includes: A dust removal device, wherein the smoke exhaust end of the drying section and the smoke exhaust end of the preheating section are both connected to the dust removal device.

10. The belt roasting system using solid fuel according to claim 9, characterized in that: The dust removal device comprises: A ninth pipeline, the smoke exhaust end of the exhaust section and the smoke exhaust end of the preheating section are both used to be connected to the smoke treatment system through the ninth pipeline; A dust removal unit, arranged in the ninth pipeline, for performing dust removal on the flue gas in the ninth pipeline; The third fan is arranged in the ninth pipeline, and is used for driving the smoke in the ninth pipeline to flow in the direction from the smoke inlet end of the dust removal part to the smoke exhaust end of the dust removal part.

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