A cement kiln bypass system

Abstract

The utility model discloses a cement kiln bypass air release system, be equipped with in the connection cement kiln system, and the cement kiln system includes preheater system and with the kiln head grid cooler of preheater system connection, and preheater system includes kiln tail smoke chamber and decomposing furnace, including cyclone separator, grinding system, alternative fuel drying device, dust catcher and bypass system fan, and the inside of kiln tail smoke chamber is linked together with cyclone separator, and the discharge end of cyclone separator is linked together with the feeding end of grinding system, and the inside of decomposing furnace is linked together with the discharge end, and the inside of kiln head grid cooler is linked together with the discharge end of alternative fuel drying device, and the discharge end of dust catcher is linked together with the gas outlet of cyclone separator, and the gas outlet is linked together with the inside of alternative fuel drying device with the gas inlet of bypass system fan, and the gas outlet, for introducing the waste gas in dust catcher into alternative fuel drying device. The utility model can solve the problem that the water content of alternative fuel is high.

Description

Technical Field

[0001] This utility model relates to the field of alternative fuel technology in the cement industry, specifically to a bypass ventilation system for cement kilns. Background Technology

[0002] Under the current foreseeable technological conditions, carbon emission reduction in the cement industry through fuel substitution technology is one of the effective measures. In order to save on the operating costs of waste gas treatment, the waste gas is usually collected and sent to the kiln head grate cooler for incineration.

[0003] For example, Chinese utility model patent publication number CN222231321U, entitled "A Bypass Venting System for Co-processing VOCs Exhaust Gas from an Environmentally Friendly Workshop Replacing Raw Materials and Fuels," includes an exhaust gas collection system connected to the environmentally friendly workshop replacing raw materials and fuels. This system is connected to both a primary cooling source VOCs exhaust gas supply system and a secondary cooling source VOCs exhaust gas supply system. The primary cooling source VOCs exhaust gas supply system is sequentially connected to a cyclone separator, a bag filter, a bypass system fan, a mixing chamber, a kiln head air supply system, a kiln head grate cooler, a rotary kiln, a kiln tail flue, a cement kiln denitrification and desulfurization system, a kiln tail dust collection system, and a chimney. The kiln tail flue is connected to the cyclone separator, and the secondary cooling source VOCs exhaust gas supply system is connected to the mixing chamber. This system reduces harmful elements within the cement kiln system, mitigates the risk of scale formation in the preheater system, achieves co-processing of VOCs exhaust gas, completes the separation of coarse and fine ash in the bypass, alleviates the emission pressure on cement enterprises, and saves on their operating costs.

[0004] However, alternative fuels often contain high levels of moisture, which leads to problems such as uneven flame concentration, poor stability, reduced thermal efficiency, and increased system energy consumption during combustion. These issues affect the normal operation of cement kiln systems and prevent large-scale, large-volume applications. Utility Model Content

[0005] The purpose of this utility model is to overcome the above-mentioned technical deficiencies and propose a bypass ventilation system for cement kilns, which solves the technical problems in the prior art where the alternative fuels often contain high moisture content, resulting in flame dispersion, poor stability, reduced thermal efficiency, and increased system energy consumption during combustion.

[0006] To achieve the above-mentioned technical objectives, the present invention adopts the following technical solution: This utility model provides a bypass venting system for a cement kiln, configured to connect to a cement kiln system. The cement kiln system includes a preheater system and a kiln head grate cooler, the kiln head grate cooler being connected to the preheater system. The preheater system includes a kiln tail flue and a decomposition furnace, comprising: The cyclone separator is connected to the interior of the kiln tail flue chamber; The grinding system has its feed end connected to the discharge end of the cyclone separator and its discharge end connected to the interior of the decomposition furnace. An alternative fuel drying device, wherein the discharge end is connected to the interior of the decomposition furnace and the gas outlet end is connected to the interior of the kiln head grate cooler; The dust collector is connected to the outlet of the cyclone separator; and The bypass system fan has its inlet end connected to the outlet end of the dust collector and its outlet end connected to the interior of the alternative fuel drying device, and is used to introduce the waste gas in the dust collector into the alternative fuel drying device. In some embodiments, the cement kiln bypass ventilation system further includes a high-temperature air volume regulating device, wherein the air inlet of the high-temperature air volume regulating device is connected to the interior of the cyclone separator and the air outlet is connected to the interior of the alternative fuel drying device.

[0007] In some embodiments, the cement kiln bypass ventilation system further includes an alternative fuel feeding system connected to the alternative fuel drying device for quantitatively supplying alternative fuel into the alternative fuel drying device.

[0008] In some embodiments, the cement kiln bypass ventilation system further includes an alternative fuel gas-solid separation system, which has a feed end, a solid discharge end, and a gas discharge end. The feed end of the alternative fuel gas-solid separation system is connected to the discharge end of the alternative fuel drying device. The solid discharge end of the alternative fuel gas-solid separation system is connected to the interior of the decomposition furnace, and the gas discharge end is connected to the interior of the kiln head grate cooler.

[0009] In some embodiments, the cement kiln bypass ventilation system further includes a first power fan, which is located at the gas outlet of the alternative fuel gas-solid separation system and is connected to both the gas outlet of the alternative fuel gas-solid separation system and the interior of the kiln head grate cooler.

[0010] In some embodiments, the first power fan has a first air outlet and a second air outlet. The first air outlet of the first power fan is connected to the interior of the kiln head grate cooler, and the second air outlet of the first power fan is connected to the interior of the cyclone separator.

[0011] In some embodiments, the cement kiln bypass ventilation system further includes a waste gas collection system, which is connected to the interior of the cyclone separator and the second outlet of the first power fan.

[0012] In some embodiments, the cement kiln bypass ventilation system further includes a pneumatic conveying device, which is connected to the interior of the grinding system and the interior of the decomposition furnace.

[0013] In some embodiments, the cement kiln bypass ventilation system further includes a second power fan, which is disposed on the pneumatic conveying device.

[0014] In some embodiments, the cement kiln bypass ventilation system further includes a water washing and salt extraction system, which is connected to the interior of the dust collector and is used to wash and extract salt from the solid materials inside the dust collector.

[0015] Compared with the prior art, the beneficial effects of the cement kiln bypass ventilation system provided by this utility model include: the feed end of the grinding system is connected to the discharge end of the cyclone separator and the discharge end is connected to the interior of the decomposition furnace; the discharge end of the alternative fuel drying device is connected to the interior of the decomposition furnace and the air outlet is connected to the interior of the kiln head grate cooler; the bypass system fan has its air inlet connected to the air outlet of the dust collector and its air outlet connected to the interior of the alternative fuel drying device, and is used to dry the alternative fuel. Compared to existing technologies, this method separates the high-temperature exhaust gas in the kiln tail flue chamber using a bypass system fan. The separated gas is then used to utilize residual heat and is supplied to the alternative fuel drying device to dry the moisture in the alternative fuel. Simultaneously, the separated solids can be mixed with the dried alternative fuel and sent to the decomposition furnace of the cement kiln system for combustion. This not only recovers and utilizes the waste heat of the cement kiln system and reduces the moisture content in the alternative fuel, but also enables the absorption of bypass exhaust gas. This solves the technical problems in existing technologies where the alternative fuel often contains high moisture content, resulting in flame dispersion, poor stability, reduced thermal efficiency, and increased system energy consumption during combustion. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of a cement kiln bypass ventilation system provided in one embodiment of the present invention.

[0017] Explanation of reference numerals in the attached figures: 1. Preheater system; 2. Kiln head grate cooler; 3. Kiln tail flue; 4. Decomposition furnace; 5. Cyclone separator; 6. Grinding system; 7. Alternative fuel drying device; 8. Dust collector; 9. Bypass system fan; 10. High-temperature gate valve; 11. High-temperature air volume regulating device; 12. Alternative fuel feeding system; 13. Alternative fuel gas-solid separation system; 14. First power fan; 15. Grate cooler air volume regulating device; 16. Waste gas collection system; 17. Pneumatic conveying device; 18. Second power fan; 19. Water washing and salt extraction system; 20. Cement kiln terminal flue gas treatment and exhaust device. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0019] To address the technical problems of uneven flame concentration, poor stability, reduced thermal efficiency, and increased system energy consumption caused by the high moisture content in alternative fuels, this invention provides a cement kiln bypass ventilation system. This system separates the high-temperature exhaust gas from the kiln tail flue chamber 3 using a bypass system fan 9. The separated gas utilizes residual heat and is used by the alternative fuel drying device 7 to dry the moisture in the alternative fuel. Simultaneously, the separated solids are mixed with the dried alternative fuel and sent to the decomposition furnace 4 of the cement kiln system for combustion. This not only recovers and utilizes the waste heat of the cement kiln system and reduces the moisture content in the alternative fuel, but also enables the utilization of bypass ventilation exhaust gas.

[0020] Please see Figure 1 , Figure 1 This is a schematic diagram of a bypass ventilation system for a cement kiln according to an embodiment of the present invention. The bypass ventilation system is configured to connect to a cement kiln system, which includes a preheater system 1 and a kiln head grate cooler 2. The kiln head grate cooler 2 is connected to the preheater system 1. The preheater system 1 includes a kiln tail flue chamber 3 and a decomposition furnace 4, and includes: a cyclone separator 5, a grinding system 6, an alternative fuel drying device 7, a dust collector 8, and a bypass system fan 9. The cyclone separator 5 is connected to the interior of the kiln tail flue chamber 3. The feed end of the grinding system 6 is connected to the discharge end of the cyclone separator 5, and the discharge end is connected to the interior of the decomposition furnace 4. The discharge end of the alternative fuel drying device 7 is connected to the interior of the decomposition furnace 4, and the air outlet end is connected to the interior of the kiln head grate cooler 2. The dust collector 8 is connected to the air outlet end of the cyclone separator 5. The air inlet end of the bypass system fan 9 is connected to the air outlet end of the dust collector 8, and the air outlet end is connected to the interior of the alternative fuel drying device 7. It is used to introduce the waste gas in the dust collector 8 into the alternative fuel drying device 7.

[0021] In this device, compared with the prior art, the high-temperature exhaust gas in the kiln tail flue 3 is separated by the bypass system fan 9. The separated gas is used to utilize the residual heat and is used by the alternative fuel drying device 7 to dry the moisture in the alternative fuel. At the same time, the separated solids can be mixed with the dried alternative fuel and sent to the decomposition furnace 4 of the cement kiln system for combustion. This not only recovers and utilizes the residual heat of the cement kiln system and reduces the moisture content in the alternative fuel, but also realizes the absorption of bypass exhaust gas. It can solve the technical problems in the prior art where the alternative fuel often contains high moisture content, resulting in flame non-concentration, poor stability, reduced thermal efficiency and increased system energy consumption during combustion.

[0022] Furthermore, the cement kiln system includes, but is not limited to, the preheater system 1 and the kiln head grate cooler 2. The kiln head grate cooler 2 is connected to the preheater system 1. The preheater system 1 includes, but is not limited to, the kiln tail smoke chamber 3 and the decomposition furnace 4. The cement kiln system composed of the preheater system 1, the kiln head grate cooler 2, the kiln tail smoke chamber 3 and the decomposition furnace 4 is a conventional setup known to those skilled in the art, and will not be described in detail here.

[0023] Furthermore, the solid materials generated by the grinding system 6 here include, but are not limited to, being conveyed to the decomposition furnace 4, and can also be conveyed to other components in the preheater system 1 for processing. This is a conventional setting known to those skilled in the art and will not be described in detail here.

[0024] Furthermore, such as Figure 1 As shown, a high-temperature slide gate valve 10 is also installed between the kiln tail flue chamber 3 and the cyclone separator 5. The high-temperature slide gate valve 10 can play the roles of material flow control, equipment isolation, high-temperature medium treatment, dust sealing and system protection. The high-temperature slide gate valve 10 is a conventional setting known to those skilled in the art, and will not be described in detail here.

[0025] Furthermore, an airlock and conveying system is provided between the cyclone separator 5 and the grinding system 6. This airlock and conveying system is a conventional setting known to those skilled in the art and will not be described in detail here.

[0026] Furthermore, the system also includes a cement kiln terminal flue gas treatment and exhaust device 20, which is used to treat the tail end exhaust gas. The cement kiln terminal flue gas treatment and exhaust device 20 is a conventional setting known to those skilled in the art, and will not be described in detail here.

[0027] In one embodiment, please refer to Figure 1 The cement kiln bypass ventilation system also includes a high-temperature air volume regulating device 11. The air inlet of the high-temperature air volume regulating device 11 is connected to the interior of the cyclone separator 5, and the air outlet is connected to the interior of the alternative fuel drying device 7.

[0028] By setting up a high-temperature air volume regulating device 11 to classify and utilize the high-temperature gas generated by the cyclone separator 5, it is not only beneficial for drying alternative fuels, but also helps to purify the flue gas of the cement kiln, thus achieving efficient utilization of the waste heat from the bypass venting and saving operating costs for cement enterprises.

[0029] Furthermore, the high-temperature air volume regulating device 11 here is a conventional setting known to those skilled in the art, and will not be described in detail here.

[0030] In this device, such as Figure 1 As shown, the cement kiln bypass ventilation system also includes a feed system 12 for alternative fuels. The feed system 12 for alternative fuels is connected to the alternative fuel drying device 7 and is used to quantitatively deliver alternative fuels into the alternative fuel drying device 7.

[0031] The alternative fuel feeding system 12 can feed the alternative fuel into the alternative fuel drying device 7 in a quantitative and timed manner, thereby realizing automated production.

[0032] Furthermore, the alternative fuel feeding system 12 here consists of a crushing and pretreatment system, a screening system, a conveying device and a feeder arranged sequentially and interconnected, used to realize the automated feeding of alternative fuels. This is a conventional setup known to those skilled in the art and will not be described in detail here.

[0033] In one embodiment, please refer to Figure 1 The cement kiln bypass ventilation system also includes an alternative fuel gas-solid separation system 13. The alternative fuel gas-solid separation system 13 has a feed end, a solid discharge end and a gas discharge end. The feed end of the alternative fuel gas-solid separation system 13 is connected to the discharge end of the alternative fuel drying device 7. The solid discharge end of the alternative fuel gas-solid separation system 13 is connected to the interior of the decomposition furnace 4 and the gas discharge end is connected to the interior of the kiln head grate cooler 2.

[0034] By setting up an alternative fuel gas-solid separation system 13, and connecting the feed end of the alternative fuel gas-solid separation system 13 to the discharge end of the alternative fuel drying device 7, the solid discharge end of the alternative fuel gas-solid separation system 13 is connected to the interior of the decomposition furnace 4, and the gas discharge end is connected to the interior of the kiln head grate cooler 2, so that the solids in the alternative fuel are efficiently transported to the decomposition furnace 4, and the gas in the alternative fuel is efficiently transported to the kiln head grate cooler 2.

[0035] Furthermore, the alternative fuel gas-solid separation system 13 here can be a cyclone separator, bag filter, or multi-cylinder dust collector that is common and readily available on the market, which can achieve gas-solid separation of alternative fuels. This is a conventional setup known to those skilled in the art and will not be described in detail here.

[0036] In one embodiment, please refer to Figure 1 The cement kiln bypass ventilation system also includes a first power fan 14, which is located at the gas outlet of the alternative fuel gas-solid separation system 13 and is connected to both the gas outlet of the alternative fuel gas-solid separation system 13 and the interior of the kiln head grate cooler 2.

[0037] By setting up a first power fan 14, the gas produced by the alternative fuel gas-solid separation system 13 is efficiently introduced into the interior of the kiln head grate cooler 2.

[0038] Furthermore, the first power fan 14 here is a common induced draft device on the market, such as an induced draft fan. This is a conventional setting known to those skilled in the art, and will not be described in detail here.

[0039] In one embodiment, please refer to Figure 1 The first power blower 14 has a first air outlet and a second air outlet. The first air outlet of the first power blower 14 is connected to the interior of the kiln head grate cooler 2, and the second air outlet of the first power blower 14 is connected to the interior of the cyclone separator 5.

[0040] The first outlet of the first power fan 14 is connected to the interior of the kiln head grate cooler 2, so that the exhaust gas after passing through the alternative fuel drying device 7 can be utilized.

[0041] Furthermore, some of the exhaust gas generated after passing through the alternative fuel drying device 7 can also enter the cyclone separator 5 through the second exhaust end for reuse.

[0042] Furthermore, in some embodiments, such as Figure 1 As shown, a grate cooler air volume regulating device 15 is also provided between the kiln head grate cooler 2 and the first air outlet of the first power fan 14, which can realize the automatic and intelligent regulation of the grate cooler air volume. The grate cooler air volume regulating device 15 is a conventional setting known to those skilled in the art, and will not be described in detail here.

[0043] In one embodiment, please refer to Figure 1 The cement kiln bypass ventilation system also includes a waste gas collection system 16, which is connected to the interior of the cyclone separator 5 and the second outlet of the first power fan 14.

[0044] The exhaust gas collection system 16 can filter and treat the exhaust gas used for secondary use, which helps to purify the flue gas of cement kiln, reduces harmful elements in the cement kiln system, and alleviates the risk of scaling and blockage in the preheater system 1.

[0045] Furthermore, the exhaust gas collection system 16 here includes a gas collection system, a cooling system, and a purification system, which are conventional settings known to those skilled in the art and will not be described in detail here.

[0046] In this embodiment, as Figure 1 As shown, the cement kiln bypass ventilation system also includes a pneumatic conveying device 17, which is connected to the interior of the grinding system 6 and the interior of the decomposition furnace 4.

[0047] By setting up a pneumatic conveying device 17, the solid materials generated by the grinding system 6 can be efficiently conveyed to the interior of the decomposition furnace 4.

[0048] Furthermore, the pneumatic conveying device 17 here conveys the solid materials generated by the grinding system 6 to the decomposition furnace 4, and can also convey them to other components in the preheater system 1 for processing. This is a conventional setting known to those skilled in the art and will not be described in detail here.

[0049] In one embodiment, please refer to Figure 1 The cement kiln bypass ventilation system also includes a second power fan 18, which is installed on the pneumatic conveying device 17.

[0050] The second power blower 18 can assist the pneumatic conveying device 17 in efficiently conveying the solid materials generated by the grinding system 6 to the interior of the decomposition furnace 4.

[0051] Furthermore, the second power blower 18 here is a common blower device on the market, such as a blower, Roots blower, or compressor. This is a conventional setting known to those skilled in the art, and will not be described in detail here.

[0052] In this embodiment, as Figure 1 As shown, the cement kiln bypass ventilation system also includes a water washing and salt extraction system 19, which is connected to the interior of the dust collector 8 and is used for the solid materials inside the water washing and salt extraction dust collector 8.

[0053] By setting up the water washing and salt extraction system 19, the solid materials separated in the dust collector 8 can be processed, and the efficiency of water washing and salt extraction can be improved by setting up the dust collector 8.

[0054] Furthermore, the water washing and salt extraction system 19 here is a conventional setting known to those skilled in the art. For reference, please refer to the Chinese utility model patent with publication number CN222231321U, entitled "A bypass ventilation system for replacing raw material and fuel VOCs exhaust gas in an environmentally friendly workshop with synergistic treatment". It will not be described in detail here.

[0055] To better understand this utility model, the following is combined with... Figure 1The technical solution of this utility model is described in detail below: The feed end of the grinding system 6 is connected to the discharge end of the cyclone separator 5 and the discharge end is connected to the interior of the decomposition furnace 4. The discharge end of the alternative fuel drying device 7 is connected to the interior of the decomposition furnace 4 and the air outlet is connected to the interior of the kiln head grate cooler 2. The bypass system fan 9 has its air inlet connected to the air outlet of the dust collector 8 and its air outlet connected to the interior of the alternative fuel drying device 7, and is used to dry alternative fuels. Compared to existing technologies, the high-temperature exhaust gas in the kiln tail flue chamber 3 is separated by the bypass system fan 9. The separated gas is used to utilize the residual heat and is used by the alternative fuel drying device 7 to dry the moisture in the alternative fuel. At the same time, the separated solids can be mixed with the dried alternative fuel and sent to the decomposition furnace 4 of the cement kiln system for combustion. This not only recovers and utilizes the residual heat of the cement kiln system and reduces the moisture content in the alternative fuel, but also enables the absorption of bypass exhaust gas. This solves the technical problems in existing technologies where the alternative fuel often contains high moisture content, resulting in flame dispersion, poor stability, reduced thermal efficiency, and increased system energy consumption during combustion.

[0056] In the specific working process of this utility model, when in use, the fans and other equipment along each air duct are first turned on. Under the action of the bypass system fan 9, a certain amount of high-temperature flue gas (1050~1250℃) is extracted from the kiln tail flue chamber 3 through the high-temperature air duct and comes into contact with the alternative fuel, which plays the role of drying the alternative fuel. During this process, the waste gas in the kiln tail flue chamber 3 is fully mixed and undergoes rapid heat exchange. Part of the waste gas enters the cyclone separator 5 for gas-solid separation. The coarse dust collected at the bottom of the cyclone separator 5 is sent to the grinding system 6 for processing by the conveying device. After being processed to a certain particle size, it is injected into the decomposition furnace 4 of the preheater system 1 by the pneumatic conveying system for flue gas desulfurization.

[0057] The flue gas, after rapid cooling and particle size separation, is introduced into the dust collector 8 through a pipeline for further gas-solid separation. Temperature sensors (no less than two, and they cannot be installed on the same side) are installed at the inlet of the dust collector 8. Fine dust particles in the ash hopper of the dust collector 8 are sent to the water washing and salt extraction system 19 for further processing through a conveying device.

[0058] Furthermore, the two flue gases before and after the dust collector 8 are mixed in a quantitative and proportional manner and enter the alternative fuel drying system. The drying system removes moisture from the alternative fuel through counter-current heat exchange. The dried exhaust gas passes through the alternative fuel gas-solid separation system 13. The separated solids and the dried material are combined and sent to the decomposition furnace 4 for combustion through the kiln feeding facility. Part of the separated gas is sent to the high-temperature section of the grate cooler for incineration in the kiln. It is then further treated by the cement kiln denitrification and desulfurization system, and then passes through the kiln tail dust collection system before finally being discharged through the kiln tail chimney in compliance with standards.

[0059] Furthermore, after passing through the alternative fuel drying device 7, another portion is used as a refrigerant to cool the high-temperature flue gas extracted from the smoke chamber.

[0060] This system reduces harmful elements in the cement kiln system, alleviates the risk of scaling and blockage in preheater system 1, improves the efficiency of water washing and salt extraction, achieves complete absorption of bypass exhaust gas, reduces the moisture content of alternative fuels, helps purify cement kiln flue gas, completes the efficient utilization of bypass exhaust waste heat, and saves operating costs for cement enterprises.

[0061] The specific embodiments of this utility model described above do not constitute a limitation on the scope of protection of this utility model. Any other corresponding changes and modifications made based on the technical concept of this utility model should be included within the scope of protection of the claims of this utility model.

Claims

1. A bypass venting system for a cement kiln, configured to connect to a cement kiln system, the cement kiln system including a preheater system and a kiln head grate cooler, the kiln head grate cooler being connected to the preheater system, the preheater system including a kiln tail flue and a decomposition furnace, characterized in that, include: The cyclone separator is connected to the interior of the kiln tail flue chamber; The grinding system has its feed end connected to the discharge end of the cyclone separator and its discharge end connected to the interior of the decomposition furnace. The alternative fuel drying device has its discharge end connected to the interior of the decomposition furnace and its gas outlet end connected to the interior of the kiln head grate cooler. The dust collector is connected to the outlet of the cyclone separator; and The bypass system fan has its inlet end connected to the outlet end of the dust collector and its outlet end connected to the interior of the alternative fuel drying device, and is used to introduce the waste gas in the dust collector into the alternative fuel drying device.

2. The cement kiln bypass ventilation system according to claim 1, characterized in that, The cement kiln bypass ventilation system also includes a high-temperature air volume regulating device. The air inlet of the high-temperature air volume regulating device is connected to the interior of the cyclone separator, and the air outlet is connected to the interior of the alternative fuel drying device.

3. The cement kiln bypass ventilation system according to claim 1, characterized in that, The cement kiln bypass ventilation system also includes an alternative fuel feeding system, which is connected to the alternative fuel drying device and is used to quantitatively deliver alternative fuel into the alternative fuel drying device.

4. The cement kiln bypass ventilation system according to claim 3, characterized in that, The cement kiln bypass ventilation system also includes an alternative fuel gas-solid separation system. The alternative fuel gas-solid separation system has a feed end, a solid discharge end, and a gas discharge end. The feed end of the alternative fuel gas-solid separation system is connected to the discharge end of the alternative fuel drying device. The solid discharge end of the alternative fuel gas-solid separation system is connected to the interior of the decomposition furnace, and the gas discharge end is connected to the interior of the kiln head grate cooler.

5. The cement kiln bypass ventilation system according to claim 4, characterized in that, The cement kiln bypass ventilation system also includes a first power fan, which is located at the gas outlet of the alternative fuel gas-solid separation system and is connected to both the gas outlet of the alternative fuel gas-solid separation system and the interior of the kiln head grate cooler.

6. The cement kiln bypass ventilation system according to claim 5, characterized in that, The first power blower has a first air outlet and a second air outlet. The first air outlet of the first power blower is connected to the interior of the kiln head grate cooler, and the second air outlet of the first power blower is connected to the interior of the cyclone separator.

7. The cement kiln bypass ventilation system according to claim 6, characterized in that, The cement kiln bypass ventilation system also includes a waste gas collection system, which is connected to the interior of the cyclone separator and the second outlet of the first power fan.

8. The cement kiln bypass ventilation system according to claim 1, characterized in that, The cement kiln bypass ventilation system also includes a pneumatic conveying device, which is connected to the interior of the grinding system and the interior of the decomposition furnace.

9. The cement kiln bypass ventilation system according to claim 8, characterized in that, The cement kiln bypass ventilation system also includes a second power fan, which is installed in the pneumatic conveying device.

10. The cement kiln bypass ventilation system according to claim 1, characterized in that, The cement kiln bypass ventilation system also includes a water washing and salt extraction system, which is connected to the interior of the dust collector and is used to wash and extract salt from the solid materials inside the dust collector.

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