Coal mine solid waste powder calcining equipment and coal mine solid waste treatment system

Abstract

The utility model discloses coal mine solid waste powder calcining equipment and a coal mine solid waste treatment system. The coal mine solid waste powder calcining equipment comprises a calcining furnace, a first cyclone separator, a second cyclone separator, a third cyclone separator, a fourth cyclone separator and a fifth cyclone separator, wherein the first cyclone separator, the second cyclone separator, the third cyclone separator, the fourth cyclone separator and the fifth cyclone separator are sequentially arranged above the calcining furnace; the first cyclone separator, the third cyclone separator and the fifth cyclone separator are arranged in the vertical direction to form a first separator set, and the second cyclone separator and the fourth cyclone separator are arranged in the vertical direction to form a second separator set. And the calcining furnace is arranged between the first separator group and the second separator group. According to the scheme, the problems that the interior is insufficient, the exterior is overburnt and the energy consumption is high when the coal mine solid waste is calcined and activated can be solved, and meanwhile the layout of the calcining furnace and the multiple cyclone separators can be more reasonable.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of coal mine solid waste treatment, and particularly relates to a coal mine solid waste powder calcining device and a coal mine solid waste treatment system. BACKGROUND

[0002] In the process of raw coal mining, 100-250 kg of coal mine solid waste (coal series kaolin) is generated per ton of raw coal mined. A large amount of coal mine solid waste not only has the problem of land occupation, but also has the problem of resource waste. At present, the utilization rate of coal mine solid waste is relatively low, usually below 20%. At present, there is no large-scale successful application for a large amount of coal mine solid waste. A few scholars or enterprises attempt to prepare microcrystalline glass, silicon aluminum oxide, ceramic matrix material, aggregate, cement product, etc., but most of the coal mine solid waste has not been reused on a large scale because of the high disposal cost or the poor quality of the produced products.

[0003] The coal mine solid waste is inertized by itself. The inertization characteristics of the coal mine solid waste caused by the long generation age, weathering, deposition and other reactions of the minerals of the coal mine solid waste make the coal mine solid waste insoluble or hardly soluble in acid or alkaline solution. Therefore, in order to extract valuable minerals or chemicals in the coal mine solid waste, an activation process is needed to destroy the stable crystal structure and mineral structure of the coal mine solid waste, so as to make the crystal cell lack and develop the original characteristics of the coal mine solid waste, thereby extracting valuable mineral elements. Calcining the coal mine solid waste is a necessary means to realize activation.

[0004] Calcining and activating the coal mine solid waste is an important process for the reuse of the coal mine solid waste. In the related technology, the calcining is usually carried out in a stacked state. Generally, granular or blocky coal mine solid waste is used in the stacked state in the calcining kiln. However, the coal mine solid waste with a large particle size is in a stacked state, and the thermal conductivity coefficient of the coal mine solid waste is low. Not only is there a problem of small contact area between the coal mine solid waste and the hot gas flow and low heat exchange efficiency, but also there is a problem of large temperature difference between the inside and the outside of the blocky coal mine solid waste, which further leads to overburning of the outside and underburning of the inside of the blocky coal mine solid waste, thereby seriously affecting the quality and activity of the final calcined product. At the same time, since the contact area between the coal mine solid waste and the hot gas flow is small, the calcining and activation of the coal mine solid waste has the problem of high energy consumption. CONTENT OF THE INVENTION

[0005] The application discloses a coal mine solid waste powder calcining device and a coal mine solid waste treatment system to solve the problems of internal underburning and external overburning and high energy consumption in the calcining and activation of the coal mine solid waste in the related technology.

[0006] In order to solve the above technical problems, the application provides the following technical solutions:

[0007] In a first aspect, the utility model discloses a kind of coal mine solid waste powder calcining equipment, including calcining furnace and sequentially arranged in the first cyclone separator of the calcining furnace, second cyclone separator, third cyclone separator, fourth cyclone separator and fifth cyclone separator;

[0008] The air inlet of the first cyclone separator is communicated with the air outlet of the calcining furnace by the first connecting pipe, so that the high-temperature flue gas discharged from the calcining furnace enters the first cyclone separator;The powder outlet of the second cyclone separator is communicated with the powder inlet of the calcining furnace by the second connecting pipe, so that the coal mine solid waste powder flowing through the second cyclone separator is transported into the calcining furnace;

[0009] The powder outlet of the third cyclone separator is communicated with the powder inlet of the second cyclone separator by the third connecting pipe, so that the coal mine solid waste powder flowing through the third cyclone separator is transported into the second cyclone separator;The air outlet of the first cyclone separator is communicated with the third connecting pipe by the fourth connecting pipe, so that the coal mine solid waste powder is driven into the second cyclone separator by the high-temperature flue gas and preheated by the high-temperature flue gas;The powder outlet of the fourth cyclone separator is communicated with the powder inlet of the third cyclone separator by the fifth connecting pipe, so that the coal mine solid waste powder flowing through the fourth cyclone separator is transported into the third cyclone separator;

[0010] The air outlet of the second cyclone separator is communicated with the fifth connecting pipe by the sixth connecting pipe, so that the coal mine solid waste powder is driven into the third cyclone separator by the high-temperature flue gas and preheated by the high-temperature flue gas;The powder outlet of the fifth cyclone separator is communicated with the powder inlet of the fourth cyclone separator by the seventh connecting pipe, so that the coal mine solid waste powder flowing through the fifth cyclone separator is transported into the fourth cyclone separator;The air outlet of the third cyclone separator is communicated with the seventh connecting pipe by the eighth connecting pipe, so that the coal mine solid waste powder is driven into the fourth cyclone separator by the high-temperature flue gas and preheated by the high-temperature flue gas;The air outlet of the fourth cyclone separator is communicated with the air inlet of the fifth cyclone separator by the ninth connecting pipe, and the ninth connecting pipe is provided with a powder input port, the coal mine solid waste powder entering from the powder input port is driven into the fifth cyclone separator by the high-temperature flue gas and preheated by the high-temperature flue gas.

[0011] In the second aspect, the utility model discloses a coal mine solid waste processing system, including powder manufacturing equipment and the coal mine solid waste powder calcining equipment described above, powder manufacturing equipment with powder import passage.

[0012] In the embodiment of the utility model, coal mine solid waste powder calcining equipment carries out calcination activation to coal mine solid waste powder, because the particle size of coal mine solid waste powder is smaller, the heat transfer efficiency between powders is higher in the process of calcination activation, thereby make coal mine solid waste's hydroxyl group removal reaction speed be faster, reach higher efficiency's decomposition reaction, finally be favorable to improve calcination activation efficiency. At the same time, coal mine solid waste powder can be more evenly fully combusted, can effectively avoid the blocky structure of the lumped coal mine solid waste in the background art to appear internal underburning, external overburning and other adverse phenomena when stacking calcining. Moreover, because the heat transfer efficiency between powders is higher in the process of calcination activation, therefore can improve heat utilization efficiency, make calcination activation energy consumption reduce, coal mine solid waste powder suspension calcining equipment can be through the configuration separation preheating device, thereby realize the reuse of waste heat in the calcination process, separation preheating device fully utilizes the preheating of high-temperature flue gas to preheat the uncalcined coal mine solid waste powder to reduce the energy consumption in the subsequent calcination process, and the preheated coal mine solid waste powder can play more sufficient decomposition reaction, which is beneficial to improve the calcination activation effect. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 It is the structure schematic diagram of coal mine solid waste powder calcining equipment disclosed by the utility model embodiment.

[0014] Mark explanation:

[0015] 10-calcination furnace, 011-powder import, 012-outlet, 013-inlet,

[0016] 20-separation preheating device, 21-first cyclone separator, 211-inlet, 212-outlet, 213-powder outlet, 22-second cyclone separator, 221-powder outlet, 222-powder inlet, 223-outlet, 23-third cyclone separator, 231-powder outlet, 232-powder inlet, 233-outlet, 24-fourth cyclone separator, 241-powder outlet, 242-powder inlet, 243-outlet, 25-fifth cyclone separator, 251-powder outlet, 252-inlet, 261-first connecting pipe, 262-second connecting pipe, 2621-second vertical section, 2622-first inclined section, 263-third connecting pipe, 264-fourth connecting pipe, 265-fifth connecting pipe, 266-sixth connecting pipe, 267-seventh connecting pipe, 268-eighth connecting pipe, 269-ninth connecting pipe, 2691-powder input, 2692-first vertical section, 2693-first horizontal section, 2694-gas booster valve, 270-tenth connecting pipe,

[0017] 30-cooler, 31-outlet, 32-adapting pipe, 301-cooling module, 302-blower, 40-conveying device. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical scheme and advantages of the present application clearer, the technical scheme of the present application will be described clearly and completely below in combination with specific embodiments of the present application and corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0019] The technical scheme disclosed in each embodiment of the present application will be described in detail below in combination with the drawings.

[0020] Please refer to Figure 1 The disclosed coal mine solid waste treatment system comprises a coal mine solid waste powder calcining device and a powder manufacturing device.

[0021] The powder manufacturing device is used at least for manufacturing the coal mine solid waste into powder, i.e. forming the coal mine solid waste powder. The powder input 2691 of the coal mine solid waste powder calcining device is connected with the powder outlet of the powder manufacturing device, and the coal mine solid waste powder calcining device is used for suspending calcining the coal mine solid waste powder, so as to finally form the powder product.

[0022] The main component of the coal mine solid waste, kaolinite, can generate high-activity metakaolin after dehydroxylation at a proper temperature. In the present application, the powder product formed after calcination by the coal mine solid waste powder calcination device is essentially metakaolin powder. The calcination of the coal mine solid waste is an endothermic reaction. When the temperature rises to about 300 DEG C, kaolinite begins to decompose to generate metakaolin and water vapor. With the further increase of the temperature, the decomposition rate will accelerate, and the decomposition is basically completed above 800 DEG C. The decomposition reaction rate of the coal mine solid waste is mainly affected by the calcination temperature and the particle size. In the embodiment of the present application, the powder manufacturing device first makes the blocky coal mine solid waste into coal mine solid waste powder (i.e. powdered coal mine solid waste), and then the coal mine solid waste powder is calcined and activated by the coal mine solid waste powder calcination device. Since the particle size of the coal mine solid waste powder is small, the heat transfer efficiency between the powders is high during the calcination and activation, so that the dehydroxylation reaction rate of the coal mine solid waste is faster, the decomposition reaction is more efficient, and finally the calcination and activation efficiency is improved.

[0023] At the same time, the blocky coal mine solid waste is made into coal mine solid waste powder to realize suspension combustion, so that the coal mine solid waste powder can be uniformly and fully combusted during the calcination and activation, and the adverse phenomena such as internal under-burning and external over-burning of the blocky structure of the blocky coal mine solid waste during the calcination of the accumulation can be effectively avoided. Moreover, since the heat transfer efficiency between the powders is high during the calcination and activation, the heat utilization efficiency can be improved, and the energy consumption of the calcination and activation can be reduced.

[0024] In the embodiment of the present application, the coal mine solid waste powder calcination device can include a calcination furnace 10, a separation preheating device 20 and a cooler 30.

[0025] The separation preheating device 20 is at least used for preheating the coal mine solid waste powder. The powder inlet of the separation preheating device 20 is connected with the powder outlet of the powder manufacturing device, so as to receive and preheat the un-preheated coal mine solid waste powder. The powder inlet of the separation preheating device 20 is also the powder input port 2691 mentioned above.

[0026] The powder inlet 011 of the calcining furnace 10 is communicated with the first powder outlet of the separation preheating device 20, so as to calcine the preheated coal mine solid waste powder discharged from the first powder outlet. The calcining furnace 10 can be a smoldering calcining furnace. The calcining method adopted by the smoldering calcining furnace does not produce an open flame, which is beneficial to realize uniform heating and calcination of the coal mine solid waste powder and can improve the uniformity of calcination activation. The air outlet 012 of the calcining furnace 10 is communicated with the air inlet of the separation preheating device 20, so as to transport the high-temperature flue gas containing the calcined coal mine solid waste powder into the separation preheating device 20 for gas-solid separation. The gas after gas-solid separation enters the separation preheating device 20 to preheat the coal mine solid waste powder that has not been calcined and enters the separation preheating device 20, so that the coal mine solid waste powder that has not been calcined enters the calcining furnace 10 at a high temperature. Such preheating can be beneficial to calcination and can also reduce the energy consumption in the calcination process.

[0027] Therefore, in the coal mine solid waste treatment system disclosed in the embodiment of the present application, the coal mine solid waste powder calcining equipment can realize the reuse of waste heat in the calcination process by configuring the separation preheating device 20. The separation preheating device 20 utilizes the preheating of high-temperature flue gas to preheat the coal mine solid waste powder that has not been calcined, so as to reduce the energy consumption in the subsequent calcination process. Moreover, the preheated coal mine solid waste powder can fully perform decomposition reaction, which is beneficial to improve the calcination activation effect.

[0028] The separation preheating device 20 has a second powder outlet, which is communicated with the powder inlet of the cooler 30, so as to transport the coal mine solid waste powder after gas-solid separation into the cooler 30 for cooling. The coal mine solid waste powder after gas-solid separation enters the cooler 30 through the second powder outlet and is cooled by the cooler 30 to form a powder product. The cooler 30 is used for cooling the calcined coal mine solid waste. The cooler 30 can be of various types, for example, the cooler 30 can be a forced air cooling device, a liquid cooling device or other device that can realize cooling through heat exchange. The present application does not limit the specific type of the cooler 30.

[0029] The structure of the separation preheating device 20 can be various, as long as the high-temperature flue gas containing the calcined coal mine solid waste powder generated by the calcining furnace 10 can be gas-solid separated, and the gas generated by the gas-solid separation can preheat the coal mine solid waste powder entering the separation preheating device 20. For example, the separation preheating device 20 can be provided with a gas passage through which the high-temperature gas generated by the gas-solid separation flows, and can be provided with a powder passage through which the coal mine solid waste powder flows. After the high-temperature flue gas is gas-solid separated, the high-temperature gas enters the gas passage, and the unpreheated coal mine solid waste enters the powder passage. Heat exchange can be achieved through the separation preheating device 20 during the flow of the high-temperature gas and the flow of the unpreheated coal mine solid waste powder, so as to achieve the purpose of preheating the coal mine solid waste powder, and finally achieve the purposes of preheating utilization and improving the calcining efficiency.

[0030] The separation preheating device 20 disclosed in the embodiment of the utility model can comprise a first cyclone separator 21, a second cyclone separator 22, a third cyclone separator 23, a fourth cyclone separator 24 and a fifth cyclone separator 25 arranged in sequence above the calcining furnace 10.

[0031] The distribution mode is beneficial to the upward flow of the high-temperature flue gas discharged from the calcining furnace 10, and the gas formed after the high-temperature flue gas is gas-solid separated directly or indirectly enters the first cyclone separator 21, the second cyclone separator 22, the third cyclone separator 23, the fourth cyclone separator 24 and the fifth cyclone separator 25 in sequence.

[0032] Specifically, the air inlet 211 of the first cyclone separator 21 is communicated with the air outlet 012 of the calcining furnace 10 through the first connecting pipe 261, so that the high-temperature flue gas discharged from the calcining furnace 10 enters the first cyclone separator 21. The first cyclone separator 21 has a separation function, so that the gas-solid separation of the high-temperature flue gas can be achieved. The coal mine solid waste powder separated by the first cyclone separator 21 is the coal mine solid waste powder that has been calcined. It should be noted that the air inlet of the separation preheating device 20 is the air inlet 211 of the first cyclone separator 21. It should be noted that the air inlet 211 of the first cyclone separator 21 is the air inlet of the separation preheating device 20.

[0033] The powder outlet 221 of the second cyclone separator 22 is communicated with the powder inlet 011 of the calcining furnace 10 through the second connecting pipe 262 to transport the coal mine solid waste powder flowing through the second cyclone separator 22 into the calcining furnace 10. The second cyclone separator 22 also has a gas-solid separation function, and the coal mine solid waste powder separated from the powder outlet 221 of the second cyclone separator 22 is the coal mine solid waste powder that has been preheated by the separation preheating device 20 and finally discharged into the calcining furnace 10. It should be noted that the powder outlet 221 of the second cyclone separator 22 is the first powder outlet.

[0034] The third cyclone separator 23 has a gas-solid separation function, and the powder outlet 231 of the third cyclone separator 23 is communicated with the powder inlet 222 of the second cyclone separator 22 through the third connecting pipe 263 to transport the coal mine solid waste powder flowing through the third cyclone separator 23 into the second cyclone separator 22, and the air outlet 212 of the first cyclone separator 21 is communicated with the third connecting pipe 263 through the fourth connecting pipe 264 to drive the coal mine solid waste powder into the second cyclone separator 22 by gas and preheat the coal mine solid waste powder by high-temperature flue gas. In this case, the gas generated after the gas-solid separation of the first cyclone separator 21 can also be used to drive the coal mine solid waste powder into the second cyclone separator 22, and can be mixed with the coal mine solid waste powder in advance to exchange heat, and then enter the second cyclone separator 22 again to exchange heat again in the second cyclone separator 22 and finally be gas-solid separated by the second cyclone separator 22. Of course, the fourth connecting pipe 264 can also directly communicate the air outlet 212 of the first cyclone separator 21 with the second cyclone separator 22, so that the gas generated after the gas-solid separation of the first cyclone separator 21 is directly mixed and exchanged in the second cyclone separator 22 and finally gas-solid separated by the second cyclone separator 22.

[0035] The powder outlet 241 of the fourth cyclone separator 24 is communicated with the powder inlet 232 of the third cyclone separator 23 through the fifth connecting pipe 265 to transport the coal mine solid waste powder flowing through the fourth cyclone separator 24 into the third cyclone separator 23. The fourth cyclone separator 24 has a gas-solid separation function, and the coal mine solid waste powder separated by the fourth cyclone separator 24 is transported into the third cyclone separator 23 through the fifth connecting pipe 265.

[0036] The air outlet 223 of the second cyclone separator 22 is communicated with the fifth connecting pipe 265 through the sixth connecting pipe 266 to drive the coal mine solid waste powder into the third cyclone separator 23 by the gas and preheat the coal mine solid waste powder by the gas. In this case, the gas generated after the gas-solid separation of the second cyclone separator 22 can also be used to drive the coal mine solid waste powder into the third cyclone separator 23, and can be mixed with the coal mine solid waste powder in advance to exchange heat, and then enters the third cyclone separator 23 to exchange heat again in the third cyclone separator 23 and finally performs gas-solid separation through the third cyclone separator 23. Of course, the sixth connecting pipe 266 can also directly communicate the air outlet 223 of the second cyclone separator 22 and the third cyclone separator 23, so that the gas generated after the gas-solid separation of the second cyclone separator 22 is directly mixed with the coal mine solid waste powder in the third cyclone separator 23 to exchange heat and finally performs gas-solid separation through the third cyclone separator 23.

[0037] The powder outlet 251 of the fifth cyclone separator 25 is communicated with the powder inlet 242 of the fourth cyclone separator 24 through the seventh connecting pipe 267 to transport the coal mine solid waste powder flowing through the fifth cyclone separator 25 into the fourth cyclone separator 24, and the fifth cyclone separator 25 has a gas-solid separation function. The coal mine solid waste powder separated through the fifth cyclone separator 25 is transported into the fourth cyclone separator 24 through the seventh connecting pipe 267.

[0038] The air outlet 233 of the third cyclone separator 23 is communicated with the seventh connecting pipe 267 through the eighth connecting pipe 268 to drive the coal mine solid waste powder into the fourth cyclone separator 24 by the high-temperature flue gas and preheat the coal mine solid waste powder by the high-temperature flue gas. In this case, the gas generated after the gas-solid separation of the third cyclone separator 23 can also be used to drive the coal mine solid waste powder into the fourth cyclone separator 24, and can be mixed with the coal mine solid waste powder in advance to heat, and then enters the fourth cyclone separator 24 to exchange heat again in the fourth cyclone separator 24 and finally performs gas-solid separation through the fourth cyclone separator 24. Of course, the eighth connecting pipe 268 can also directly communicate the air outlet 233 of the third cyclone separator 23 and the fourth cyclone separator 24, so that the gas generated after the gas-solid separation of the third cyclone separator 23 is directly mixed with the coal mine solid waste powder in the fourth cyclone separator 24 to exchange heat and finally performs gas-solid separation through the fourth cyclone separator 24.

[0039] The air outlet 243 of the fourth cyclone separator 24 is communicated with the air inlet 252 of the fifth cyclone separator 25 through the ninth connecting pipe 269, and the ninth connecting pipe 269 is provided with a powder input port 2691 which is a powder inlet of the separation preheating device 20, so that the coal mine solid waste powder entering from the powder input port is driven by gas to enter the fifth cyclone separator 25, the powder outlet 213 of the first cyclone separator 21 is communicated with the cooler 30, and the coal mine solid waste powder after calcination generated after the high-temperature flue gas is subjected to gas-solid separation through the first cyclone separator 21 enters the cooler 30 for subsequent cooling. It should be noted that the powder outlet 213 of the first cyclone separator 21 is a second powder outlet.

[0040] The separation preheating device 20 disclosed in the embodiment of the utility model is in work, the coal mine solid waste powder will enter the separation preheating device 20 from the powder input port, and the gas separated out from the fourth cyclone separator 24 will preheat the coal mine solid waste powder entering the fifth cyclone separator 25, the coal mine solid waste powder separated out from the fifth cyclone separator 25 will enter the fourth cyclone separator 24 through the seventh connecting pipe 267, and the gas separated out from the third cyclone separator 23 will be input into the seventh connecting pipe 267 and preheat the coal mine solid waste powder. The coal mine solid waste powder separated out from the fourth cyclone separator 24 will enter the third cyclone separator 23 through the fifth connecting pipe 265, and the gas separated out from the second cyclone separator 22 will be input into the fifth connecting pipe 265 and preheat the coal mine solid waste powder. The coal mine solid waste powder separated out from the third cyclone separator 23 will enter the second cyclone separator 22 through the third connecting pipe 263, and the gas separated out from the first cyclone separator 21 will be input into the third connecting pipe 263 and preheat the coal mine solid waste powder. The coal mine solid waste separated out from the second cyclone separator 22 will be transported to the calcining furnace 10 for calcination.

[0041] Through the above work, the gas formed after the high-temperature flue gas discharged from the calcining furnace 10 is subjected to gas-solid separation by the first cyclone separator 21 will gradually go up, thereby preheating the coal mine solid waste powder entering the second cyclone separator 22, the third cyclone separator 23, the fourth cyclone separator 24 and the fifth cyclone separator 25 in turn, so that the coal mine solid waste powder input into the separation preheating device 20 from the powder input port is preheated multiple times in the process of descending, which can ultimately better improve the preheating effect and improve the waste heat utilization rate.

[0042] The structures and gas-solid separation principles of the first cyclone separator 21, the second cyclone separator 22, the third cyclone separator 23, the fourth cyclone separator 24 and the fifth cyclone separator 25 are known bases, and the technical improvement point of the embodiment of the utility model is not in the cyclone separator itself, therefore, details are not repeated here. In order to avoid the coal mine solid waste powder discharged from the powder outlet of the first cyclone separator 21, the second cyclone separator 22, the third cyclone separator 23, the fourth cyclone separator 24 and the fifth cyclone separator 25 backflow, the anti-backflow valve can be arranged on the powder outlet of the first cyclone separator 21, the second cyclone separator 22, the third cyclone separator 23, the fourth cyclone separator 24 and the fifth cyclone separator 25 or the corresponding connecting pipe, thereby ensuring that the coal mine solid waste powder discharged from the powder outlet flows in the required direction.

[0043] In the embodiment of the utility model, the first cyclone separator 21, the third cyclone separator 23 and the fifth cyclone separator 25 are arranged along the vertical direction to form a first separator group, the second cyclone separator 22 and the fourth cyclone separator 24 are arranged along the vertical direction to form a second separator group, and the calcining furnace 10 is arranged between the first separator group and the second separator group. This distribution mode can make the first cyclone separator 21, the second cyclone separator 22, the third cyclone separator 23, the fourth cyclone separator 24 and the fifth cyclone separator 25 fully utilize the space on both sides of the calcining furnace 10 for distribution, thereby realizing a more reasonable layout.

[0044] In the embodiment of the utility model, the shape of the ninth connecting pipe 269 can be various, in an embodiment, the ninth connecting pipe 269 can include a first vertical section 2692 and a first horizontal section 2693, the bottom end of the first vertical section 2692 is communicated with the air outlet 243 of the fourth cyclone separator 24. The top end of the first vertical section 2692 is communicated with one end of the first horizontal section 2693. The other end of the first horizontal section 2693 is communicated with the air inlet 252 of the fifth cyclone separator 25, and the powder input port 2691 is arranged on the first vertical section 2692. This structure can make the coal mine solid waste powder entering the ninth connecting pipe 269 through the powder input port 2691 be driven by the impact from bottom to top, thereby making the coal mine solid waste powder better enter the fifth cyclone separator 25.

[0045] Further, the coal mine solid waste powder calcination equipment disclosed by the embodiment of the utility model further can include gas booster valve 2694, gas booster valve 2694 is located between the air outlet 243 of fourth cyclone separator 24 and powder input port 2691, to improve the pressure of high-temperature flue gas blowing coal mine solid waste powder. Gas booster valve 2694 can improve the pressure of high-temperature flue gas by adjusting the gas flow, and then make high-temperature flue gas better impact the coal mine solid waste powder input from powder input port 2691.

[0046] In the embodiment of the utility model, the structure of the second connecting pipe 262 can be various, as long as the coal mine solid waste powder discharged from the powder outlet 221 of the second cyclone separator 22 can be transported into the calcination furnace 10. In order to better transport the coal mine solid waste powder, in an embodiment, the second connecting pipe 262 can include a second vertical section 2621 and a first inclined section 2622. The top end of the second vertical section 2621 is communicated with the powder outlet 221 of the second cyclone separator 22, the top end of the first inclined section 2622 is communicated with the bottom end of the second vertical section 721, and the bottom end of the first inclined section 2622 is communicated with the powder inlet 011 of the calcination furnace 10. In this structure, the coal mine solid waste powder flowing out of the powder outlet 221 of the second cyclone separator 22 can better move downward under the guidance of the second vertical section 2621. After the coal mine solid waste powder moves from the second vertical section 2621 into the first inclined section 2622, the first inclined section 2622 can better guide the coal mine solid waste powder to the central position of the calcination furnace 10 due to the inclined extension, thereby facilitating more sufficient calcination.

[0047] The coal mine solid waste powder calcination equipment disclosed by the embodiment of the utility model further can include a tenth connecting pipe 270, the top end of the tenth connecting pipe 270 is communicated with the powder outlet 213 of the first cyclone separator 21, the bottom end of the tenth connecting pipe 270 is connected with the powder inlet of the cooler 30, and the tenth connecting pipe 270 is used to transport the calcined coal mine solid waste powder separated by the first cyclone separator 21 into the cooler 30.

[0048] The coal mine solid waste powder cooled and cooled by the cooler 30 is a powder finished product. In order to facilitate immediate transportation, the coal mine solid waste powder calcination equipment disclosed by the embodiment of the utility model further can include a conveying device 40, the conveying device 40 is opposite to the powder outlet of the cooler 30 to transport the coal mine solid waste powder discharged by the cooler 30 away. The conveying device 40 can be a belt conveyor, a hopper conveyor, etc., and the embodiment of the utility model does not limit the specific type of the conveying device 40.

[0049] In the embodiment of the utility model, the type of cooler 30 can be various, for example, cooler 30 can be air cooling equipment, also can be liquid cooling equipment. In an embodiment, cooler 30 is air cooling equipment, and the air outlet 31 of cooler 30 can be communicated with the air inlet 013 of calcining furnace 10 through the adapter pipe 32. The adapter pipe 32 is used to deliver the cooling air of coal mine solid waste powder after heat exchange in cooler 30 to calcining furnace 10. In this structure, the cooling air in cooler 30 is heated after heat exchange with coal mine solid waste powder, and then is sent into calcining furnace 10 as combustion-supporting air, which can realize preheating utilization, and is also beneficial to improve the calcining efficiency of calcining furnace 10.

[0050] In the embodiment of the utility model, cooler 30 includes multiple cooling modules 301, and the multiple cooling modules 301 are connected in series, the inlet of the cooling module 301 close to calcining furnace 10 is communicated with the bottom end of the tenth connecting pipe 270, and the cooling module 301 close to calcining furnace 10 has the air outlet 31 of cooler 30; cooler 30 at least includes a blower 302, the blower 302 is connected with the cooling module 301, and is used to deliver cooling air to cooler 30 through the cooling module 301. In the specific cooling process, this structure can make the coal mine solid waste powder flow from the cooling module 301 close to calcining furnace 10 to the direction away from calcining furnace 10, so that multi-stage cooling is realized in the multiple cooling modules 301 in turn, which undoubtedly can improve the cooling effect. The cooling air flows from the cooling module 301 away from calcining furnace 10 to the cooling module 301 close to calcining furnace 10, and finally enters calcining furnace 10 for combustion after being heated, and this multi-stage cooling can heat the cooling air in stages, which is beneficial to improve the waste heat utilization efficiency.

[0051] In an embodiment, cooler 30 can include a blower 302, and the blower 302 can be connected with the cooling module 301 away from calcining furnace 10 and deliver cooling air to the cooling module 301. In order to improve the cooling effect, in another embodiment, cooler 30 can include multiple blowers 302, and the multiple cooling modules 301 and the multiple blowers 302 can be connected one by one, and each blower 302 can deliver cooling air to cooler 30 through the corresponding cooling module 301.

[0052] The embodiments of the application are described above in combination with the drawings, but the application is not limited to the above specific embodiments, and the above specific embodiments are only illustrative but not restrictive, and those skilled in the art can make many forms under the inspiration of the application without departing from the purpose of the application and the scope protected by the claims, which all belong to the protection of the application.

Claims

1. A coal mine solid waste powder calcining apparatus, characterized by, The calcinator (10) and the first cyclone separator (21), the second cyclone separator (22), the third cyclone separator (23), the fourth cyclone separator (24) and the fifth cyclone separator (25) arranged above the calcinator (10) in sequence are included; The air inlet (211) of the first cyclone separator (21) is communicated with the air outlet (012) of the calcinator (10) through the first connecting pipe (261), so that the high-temperature flue gas discharged from the calcinator (10) enters the first cyclone separator (21); the powder outlet (221) of the second cyclone separator (22) is communicated with the powder inlet (011) of the calcinator (10) through the second connecting pipe (262), so that the coal mine solid waste powder flowing through the second cyclone separator (22) is transported into the calcinator (10); The powder outlet (231) of the third cyclone separator (23) is communicated with the powder inlet (222) of the second cyclone separator (22) through the third connecting pipe (263), so that the coal mine solid waste powder flowing through the third cyclone separator (23) is transported into the second cyclone separator (22); the air outlet (212) of the first cyclone separator (21) is communicated with the third connecting pipe (263) through the fourth connecting pipe (264), so that the coal mine solid waste powder is driven into the second cyclone separator (22) by the high-temperature flue gas and the coal mine solid waste powder is preheated by the high-temperature flue gas; the powder outlet (241) of the fourth cyclone separator (24) is communicated with the powder inlet (232) of the third cyclone separator (23) through the fifth connecting pipe (265), so that the coal mine solid waste powder flowing through the fourth cyclone separator (24) is transported into the third cyclone separator (23); An air outlet (223) of the second cyclone separator (22) is communicated with the fifth connecting pipe (265) through a sixth connecting pipe (266) to drive the coal mine solid waste powder into the third cyclone separator (23) by the high-temperature flue gas and preheat the coal mine solid waste powder by the high-temperature flue gas; a powder outlet (251) of the fifth cyclone separator (25) is communicated with a powder inlet (242) of the fourth cyclone separator (24) through a seventh connecting pipe (267) to convey the coal mine solid waste powder flowing through the fifth cyclone separator (25) into the fourth cyclone separator (24), an air outlet (233) of the third cyclone separator (23) is communicated with the seventh connecting pipe (267) through an eighth connecting pipe (268) to drive the coal mine solid waste powder into the fourth cyclone separator (24) by the high-temperature flue gas and preheat the coal mine solid waste powder by the high-temperature flue gas; an air inlet (252) of the fifth cyclone separator (25) is communicated with an air outlet (243) of the fourth cyclone separator (24) through a ninth connecting pipe (269), the ninth connecting pipe (269) is provided with a powder input port (2691), the coal mine solid waste powder entering from the powder input port (2691) enters the fifth cyclone separator (25) under the driving of the high-temperature flue gas and is preheated by the high-temperature flue gas; The first cyclone separator (21), the third cyclone separator (23) and the fifth cyclone separator (25) are arranged in a vertical direction to form a first separator group, the second cyclone separator (22) and the fourth cyclone separator (24) are arranged in a vertical direction to form a second separator group, and the calcining furnace (10) is arranged between the first separator group and the second separator group.

2. The coal mine solid waste powder calcining apparatus according to claim 1, characterized in that, The ninth connecting pipe (269) comprises a first vertical section (2692) and a first horizontal section (2693); a bottom end of the first vertical section (2692) is communicated with the air outlet (243) of the fourth cyclone separator (24); a top end of the first vertical section (2692) is communicated with one end of the first horizontal section (2693), the other end of the first horizontal section (2693) is communicated with the air inlet (252) of the fifth cyclone separator (25), and the powder input port (2691) is arranged on the first vertical section (2692).

3. The coal mine solid waste powder calcining apparatus according to claim 2, characterized in that, The coal mine solid waste powder calcining equipment further comprises a gas booster valve (2694) arranged between the air outlet (243) of the fourth cyclone separator (24) and the powder input port (2691) to increase the pressure of the high-temperature flue gas blowing the coal mine solid waste powder.

4. The coal mine solid waste powder calcining apparatus according to claim 1, characterized in that, The second connecting pipe (262) comprises a second vertical section (2621) and a first inclined section (2622); the top end of the second vertical section (2621) is communicated with the powder outlet (221) of the second cyclone separator (22), the top end of the first inclined section (2622) is communicated with the bottom end of the second vertical section (2621), and the bottom end of the first inclined section (2622) is communicated with the powder inlet (011) of the calcining furnace (10).

5. The coal mine solid waste powder calcining apparatus according to claim 1, characterized in that, The coal mine solid waste powder calcining equipment further comprises a tenth connecting pipe (270) and a cooler (30); the top end of the tenth connecting pipe (270) is communicated with the powder outlet (213) of the first cyclone separator (21), and the bottom end of the tenth connecting pipe (270) is connected with the powder inlet of the cooler (30); the tenth connecting pipe (270) is used for conveying the calcined coal mine solid waste powder separated by the first cyclone separator (21) into the cooler (30).

6. The coal mine solid waste powder calcining apparatus according to claim 5, characterized in that, The coal mine solid waste powder calcining equipment further comprises a conveying device (40) opposite to the powder outlet of the cooler (30) and used for conveying away the coal mine solid waste powder discharged by the cooler (30).

7. The coal mine solid waste powder calcining apparatus according to claim 5, characterized in that, The cooler (30) is a wind cooling equipment, and an air outlet (31) of the cooler (30) is communicated with an air inlet (013) of the calcining furnace (10) through a connecting pipe (32); the connecting pipe (32) is used for conveying cooling air after heat exchange with the coal mine solid waste powder in the cooler (30) into the calcining furnace (10).

8. The coal mine solid waste powder calcining apparatus according to claim 7, characterized in that, The cooler (30) comprises a plurality of cooling modules (301) connected in series; the inlet of the cooling module (301) close to the calcining furnace (10) is communicated with the bottom end of the tenth connecting pipe (270), and the cooling module (301) close to the calcining furnace (10) has the air outlet (31) of the cooler (30); the cooler (30) further comprises a blower (302) connected with the cooling module (301) and used for conveying the cooling air into the cooler (30) through the cooling module (301).

9. The coal mine solid waste powder calcining apparatus according to claim 8, characterized in that, The cooler (30) comprises a plurality of the blower (302), and the plurality of cooling modules (301) are connected with the plurality of blowers (302) in one-to-one correspondence; each blower (302) conveys the cooling air into the cooler (30) through the corresponding cooling module (301).

10. A coal mine solid waste treatment system, characterized in that, The coal mine solid waste powder calcining equipment according to any one of claims 1-9 is used in a powder manufacturing equipment communicated with the powder inlet (2691).

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