Preheating and predecomposing system

Abstract

The utility model relates to the technical field of cement preparation, in particular to a preheating and predecomposing system. The utility model provides a preheating and pre-decomposing system which comprises a first row of preheaters, a second row of preheaters, a feeding mechanism, a blanking mechanism and a material distributing mechanism, when raw materials are fed, the feeding mechanism is communicated with the first-row first-stage ascending pipeline and the second-row first-stage ascending pipeline through the discharging mechanism. Raw materials enter the first-row first-stage cyclone cylinder and the second-row first-stage cyclone cylinder respectively, and the lower ends of the first-row first-stage cyclone cylinder are communicated with the first-row first-stage ascending pipeline and the second-row first-stage ascending pipeline respectively through a material distributing mechanism. Materials can be directly fed into the first column of preheaters and the second column of preheaters through the feeding mechanism, the amount of raw materials entering the first column of preheaters and the second column of preheaters can be adjusted through the material distributing mechanism, then parameters such as outlet temperature, waste gas and pressure of the two columns of preheaters tend to be balanced, the working condition is stabilized, and the heat exchange efficiency is improved. Energy is saved and consumption is reduced.

Description

Technical Field

[0001] This utility model relates to the field of cement preparation technology, specifically to a preheating and pre-decomposition system. Background Technology

[0002] Currently, cement companies have widely adopted five-stage suspension preheating and pre-decomposition systems for cement clinker production. In the new dry process cement clinker manufacturing process, raw meal needs to undergo suspension and separation processes in the preheater and decomposition furnace before entering the rotary kiln, to achieve dehydration, preheating, and decomposition of calcium carbonate in the raw meal, and finally enter the rotary kiln for calcination.

[0003] The current five-stage dual-channel preheating and pre-decomposition system includes two rows of five-stage preheaters. Each row of five-stage preheaters includes five cyclones arranged from top to bottom. The first row of five-stage preheaters includes a first-stage cyclone, a first-stage cyclone, a first-stage cyclone, a first-stage cyclone, a first-stage cyclone, a first-stage cyclone, and a first-stage cyclone, arranged from top to bottom. The second row of five-stage preheaters includes a second-stage cyclone, a second-stage cyclone, a second-stage cyclone, a second-stage cyclone, a second-stage cyclone, and a second-stage cyclone, arranged from top to bottom. The second-stage first-stage cyclone includes a first cylinder and a second cylinder. Each row of adjacent cyclones is connected to an ascending pipe, and the lower end of the previous cyclone is connected to the next ascending pipe through a material pipe.

[0004] Currently, when feeding raw materials into the preheaters, the raw materials are fed into the uppermost rising pipes of the two preheater rows via feeders. However, the existing raw material feeding method has a fixed feeding ratio for the two preheater rows. Since there may be inconsistencies in the raw material temperature of each kiln, the temperature of the cyclone discharge, and the temperature of the uppermost cyclone, there will be significant deviations in the exhaust gas volume and temperature of the two preheater rows. This will result in differences in the solid-gas ratio between the two preheater rows and affect the heat exchange effect. Utility Model Content

[0005] (I) The technical problem to be solved by this utility model is that in the existing preheating and predecomposition system, the ratio of material to the two preheaters is fixed when raw materials are fed. However, due to the possible differences in environmental parameters of each row, there are obvious deviations in the exhaust gas volume and temperature at the outlet of the two preheaters, and the solid-gas ratio of the two preheaters is different, which affects the heat exchange effect.

[0006] (II) Technical Solution

[0007] To solve the above-mentioned technical problems, one embodiment of the present invention provides a preheating and pre-decomposition system, including: a feeding mechanism, a discharging mechanism and a distributing mechanism, a first row of preheaters and a second row of preheaters;

[0008] The first row of preheaters includes, from top to bottom, a first row of primary cyclone separators, a first row of secondary cyclone separators, a first row of tertiary cyclone separators, a first row of quaternary cyclone separators, and a first row of quinary cyclone separators;

[0009] The first column of primary cyclone separators and the first column of secondary cyclone separators are connected by the first column of primary rising pipes; the first column of secondary cyclone separators and the first column of tertiary cyclone separators are connected by the second column of secondary rising pipes; the first column of tertiary cyclone separators and the first column of quaternary cyclone separators are connected by the first column of tertiary rising pipes; and the first column of quaternary cyclone separators and the first column of quinary cyclone separators are connected by the first column of quaternary rising pipes.

[0010] The second row of preheaters includes, from top to bottom, a second row of primary cyclone separators, a second row of secondary cyclone separators, a second row of tertiary cyclone separators, a second row of quaternary cyclone separators, and a second row of quinary cyclone separators;

[0011] The second column of primary cyclone separators and the second column of secondary cyclone separators are connected through the second column of primary rising pipes; the second column of secondary cyclone separators and the second column of tertiary cyclone separators are connected through the second column of secondary rising pipes; the second column of tertiary cyclone separators and the second column of quaternary cyclone separators are connected through the second column of tertiary rising pipes; and the second column of quaternary cyclone separators and the second column of quinary cyclone separators are connected through the second column of quaternary rising pipes.

[0012] The feeding mechanism is connected to the first and second primary riser pipes via a feeding mechanism. The lower end of the first primary cyclone is connected to the distribution mechanism, which is connected to the first and second primary riser pipes via a material pipe.

[0013] According to one embodiment of the present invention, the second column of primary cyclone separators includes a first cylinder and a second cylinder;

[0014] The first cylinder and the second column of secondary cyclones are connected through the second column of primary riser pipes; the lower end of the first cylinder is connected to the first column of secondary riser pipes through a material pipe; the lower end of the second cylinder is connected to the second column of secondary riser pipes through a material pipe.

[0015] According to one embodiment of the present invention, a three-way material distribution valve is provided on the material pipe between the lower end of the first cylinder and the first column of secondary rising pipes, and the three-way material distribution valve has a first interface, a second interface and a third interface;

[0016] The first column of secondary riser pipes has a first inlet and a second inlet, the first inlet being connected to the feed pipe, the second inlet being connected to the first inlet, and the third inlet being connected to the second inlet; and / or,

[0017] A three-way material distribution valve is provided on the material pipe between the lower end of the second cylinder and the second column of secondary riser pipes. The three-way material distribution valve has a first interface, a second interface and a third interface.

[0018] The second column of secondary riser pipes has a first inlet and a second inlet. The first interface is connected to the feed pipe, the second interface is connected to the first inlet, and the third interface is connected to the second inlet.

[0019] According to one embodiment of the present invention, the first feed inlet is higher than the second feed inlet.

[0020] According to one embodiment of the present invention, the first column of secondary riser pipes includes a drag-reducing layer, a casting layer and a heat insulation layer arranged sequentially from the inside to the outside; and / or, the second column of secondary riser pipes includes a drag-reducing layer, a casting layer and a heat insulation layer arranged sequentially from the inside to the outside.

[0021] According to one embodiment of the present invention, the first column of secondary riser pipes includes a pipe body and a top cover, wherein the pipe body is vertically arranged and has an internal cavity; the top cover is disposed at the upper end of the pipe body;

[0022] The top cover and the upper end of the tube form a first opening communicating with the cavity, and the lower end of the tube forms a second opening; wherein the top cover includes a first plate, a second plate and a third plate;

[0023] The first plate is horizontally arranged, one end of the second plate is connected to the first plate, and the other end is connected to one end of the third plate. The other end of the third plate is connected to the upper end of the tube. The second plate and the third plate are inclined downward relative to the first plate.

[0024] According to one embodiment of the present invention, the second column of secondary riser pipes includes a pipe body and a top cover, wherein the pipe body is vertically arranged and has an internal cavity; the top cover is disposed at the upper end of the pipe body;

[0025] The top cover and the upper end of the tube form a first opening communicating with the cavity, and the lower end of the tube forms a second opening; wherein the top cover includes a first plate, a second plate and a third plate;

[0026] The first plate is horizontally arranged, one end of the second plate is connected to the first plate, and the other end is connected to one end of the third plate. The other end of the third plate is connected to the upper end of the tube. The second plate and the third plate are inclined downward relative to the first plate.

[0027] According to one embodiment of the present invention, the material dispensing mechanism includes a housing and a baffle;

[0028] The shell includes a first pipe section, a second pipe section, and a main pipe section, wherein a main channel is formed in the main pipe section, a first channel is formed in the first pipe section, and a second channel is formed in the second pipe section;

[0029] The first channel and the second channel are respectively connected to the main channel. The baffle is rotatably disposed at the connection between the first channel and the second channel. The baffle can rotate to adjust the opening degree of the connection between the first channel, the second channel and the main channel.

[0030] According to one embodiment of the present invention, an opening is provided on one side wall of the first pipe segment, and one end of the second pipe segment is connected to the opening;

[0031] The lower end of the baffle is connected to the inner wall of the opening on the lower side, and a first shielding part and a second shielding part are formed on the lower side of the main pipe section;

[0032] When the baffle is rotated to the first limit position, the first channel is connected to the main channel, and the other end of the baffle is located below the first blocking part;

[0033] When the baffle is rotated to the second limit position, the second channel is connected to the main channel, and the other end of the baffle is located below the second shielding part.

[0034] According to one embodiment of the present invention, the first blocking part is the inner wall on the upper side of the opening;

[0035] The outer wall of the main pipe section is connected to the inner wall of the first pipe section, and the lower end of the main pipe section forms the second shielding part.

[0036] The beneficial effects of this utility model are as follows: The preheating and pre-decomposition system provided by this utility model includes a first preheater, a second preheater, a feeding mechanism, a discharging mechanism, and a distributing mechanism. When feeding raw material, the feeding mechanism is connected to the first and second primary riser pipes respectively through the discharging mechanism. Under the suction of the high-temperature fan, the raw material enters the first and second primary cyclone separators respectively. At the same time, the lower end of the first primary cyclone separator is connected to the first and second primary riser pipes respectively through the distributing mechanism. In this way, in addition to the raw material directly fed into the first and second preheaters by the feeding mechanism, the amount of raw material entering the first and second preheaters can also be adjusted by the distributing mechanism. This achieves a more balanced output temperature, exhaust gas, and pressure parameters for the two preheaters, stabilizes the operating conditions, and improves heat exchange efficiency, thereby saving energy and reducing consumption. Attached Figure Description

[0037] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0038] Figure 1 A schematic diagram of a preheating and pre-decomposition system provided in one embodiment of this utility model;

[0039] Figure 2 A schematic diagram of the material distribution mechanism with the baffle in its first extreme position;

[0040] Figure 3 A schematic diagram showing the baffle of the material distribution mechanism in its second extreme position;

[0041] Figure 4 This is a schematic diagram of the structure of the first column of secondary ascending pipes.

[0042] Icon: 1 - Preheating and pre-decomposition system;

[0043] 11-First row of preheaters; 111-First row of primary cyclone separators; 112-First row of secondary cyclone separators; 113-First row of tertiary cyclone separators; 114-First row of quaternary cyclone separators; 115-First row of quinary cyclone separators; 116-First row of primary riser pipes; 117-First row of secondary riser pipes; 1171-Pipe body; 11711-First feed inlet; 11712-Second feed inlet; 1172-Top cover; 11721-First plate; 11722-Second plate; 11723-Third plate; 118-First row of tertiary riser pipes; 119-First row of quaternary riser pipes;

[0044] 12-Second row preheater; 121-Second row primary cyclone separator; 122-Second row secondary cyclone separator; 123-Second row tertiary cyclone separator; 124-Second row quaternary cyclone separator; 125-Second row quintuplet cyclone separator; 126-Second row primary riser pipe; 127-Second row secondary riser pipe; 128-Second row tertiary riser pipe; 129-Second row quaternary riser pipe;

[0045] 13-Feeding mechanism; 14-Discharge mechanism;

[0046] 15-Distribution mechanism; 151-Main pipe section; 1511-Second shielding part; 1512-Main channel; 152-First pipe section; 1521-Opening; 1522-First shielding part; 1523-First channel; 153-Second pipe section; 1531-Second channel; 154-Baffle; 16-Three-way distribution valve; 17-Decomposition furnace; 18-Rotary kiln; 19-Material pipe. Detailed Implementation

[0047] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. Unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0048] In existing preheating and predecomposition systems, materials are directly distributed to two rows of preheaters at a certain ratio via a feeding mechanism. Alternatively, the existing feeding mechanism feeds raw material into the first-stage cyclone separator of the first row through an ascending pipe, and then into the second-stage dual-channel cyclone separator via another ascending pipe, providing raw material to both the first and second preheaters. However, in both of these schemes, the ratio of raw material entering the two preheaters is fixed, making it impossible to adjust the ratio. In actual use, the raw material temperature in each kiln, the temperature of the cyclone feed, and the temperature of the first-stage cyclone separator may be inconsistent, leading to significant deviations in the exhaust gas volume and temperature of the two preheaters, resulting in differences in the solid-gas ratio and affecting the heat exchange effect. Therefore, this application designs a preheating and predecomposition system that can adjust the amount of raw material in the two preheaters according to actual operating conditions, as detailed below.

[0049] like Figure 1As shown, one embodiment of this utility model provides a preheating and pre-decomposition system 1, including: a feeding mechanism 13, a discharging mechanism 14, and a distributing mechanism 15; a first row of preheaters 11 and a second row of preheaters 12; the first row of preheaters 11 includes, from top to bottom, a first row of primary cyclone separators 111, a first row of secondary cyclone separators 112, a first row of tertiary cyclone separators 113, a first row of quaternary cyclone separators 114, and a first row of quinary cyclone separators; the first row of primary cyclone separators 111 and the first row of secondary cyclone separators 112... The first column of primary riser pipes 116 connects the first column of secondary cyclones 112 and 113, which are connected via the second column of secondary riser pipes 127. The first column of tertiary cyclones 113 and 114 are connected via the first column of tertiary riser pipes 118, and the first column of quaternary cyclones 114 and 115 are connected via the first column of quaternary riser pipes 119. The second column of preheaters 12 includes a second column of primary cyclones arranged sequentially from top to bottom. 121, 122, 123, 124, and 125 of the second-stage cyclone separator; the second-stage cyclone separator 121 and 122 are connected by the second-stage riser pipe 126; the second-stage cyclone separator 122 and 123 are connected by the second-stage riser pipe 127; the second-stage cyclone separator 123 and 124 are connected by the second-stage riser pipe 126. 8. The second column of fourth-stage cyclone 124 and the second column of fifth-stage cyclone 125 are connected by the second column of fourth-stage rising pipe 129; the feeding mechanism 13 is connected to the first column of first-stage rising pipe 116 and the second column of first-stage rising pipe 126 through a discharging mechanism 14 respectively; the lower end of the first column of first-stage cyclone 111 is connected to the distributing mechanism 15; the distributing mechanism 15 is connected to the first column of first-stage rising pipe 116 and the second column of first-stage rising pipe 126 through a material pipe 19 respectively.

[0050] The preheating and pre-decomposition system 1 provided in this embodiment includes a first row of preheaters 11, a second row of preheaters 12, a feeding mechanism 13, a discharging mechanism 14, and a distributing mechanism 15; wherein the first row of preheaters 11 includes five cyclones, and the second row of preheaters 12 includes five cyclones; when feeding raw materials, the feeding mechanism 13 is connected to the first row of primary riser pipes 116 and the second row of primary riser pipes 126 through the discharging mechanism 14 respectively; under the suction of the high-temperature fan, the raw materials enter the first row of primary cyclones 111 and the second row of primary cyclones 121 respectively, while the first row of preheaters 12... The lower end of a single-stage cyclone separator 111 is connected to the first-stage riser pipe 116 and the second-stage riser pipe 126 via a material distribution mechanism 15. In this way, the amount of raw material entering the first-stage preheater 11 and the second-stage preheater 12 can be adjusted by the material distribution mechanism 15, in addition to the amount of raw material directly fed into the first-stage preheater 11 and the second-stage preheater 12 by the proportion fed by the feeding mechanism 13. This allows the outlet temperature, exhaust gas, pressure and other parameters of the two preheaters to tend to be balanced, stabilize the operating conditions, and thus improve heat exchange efficiency and save energy.

[0051] Among them, such as Figure 1 As shown, the preheating and pre-decomposition system 1 provided in this embodiment includes an eight-layer structure. From bottom to top, the layers are: the first layer, the second layer, the third layer, the fourth layer, the fifth layer, the sixth layer, the seventh layer, and the eighth layer. The first layer contains a rotary kiln 18; the second layer contains the lower half of a decomposition furnace 17; the third layer contains a first row of five-stage cyclone separators 115, a second row of five-stage cyclone separators 125, and the upper half of a first-stage decomposition furnace 17; the fourth layer contains a first row of four-stage cyclone separators 114 and a second row of four-stage cyclone separators 124; the fifth layer contains a first row of three-stage cyclone separators 113 and a second row of three-stage cyclone separators 123; the sixth layer contains a first row of two-stage cyclone separators 112 and a second row of two-stage cyclone separators 122; the seventh layer contains a second row of first-stage cyclone separators 121, meaning the seventh layer contains both a first cylinder and a second cylinder; and the eighth layer contains a first row of first-stage cyclone separators 111. In this embodiment, without increasing the load on the preheater tower, raising the first-stage cyclone 111 is equivalent to adding a heat exchange stage, thus increasing the number of heat exchanges between the raw material and the stage, thereby improving the solid-gas ratio of the rising pipe. The solid-gas ratio of the second-stage rising pipe 126 can reach more than 2, significantly reducing the temperature of the exhaust gas at the preheater outlet and significantly improving the heat exchange efficiency.

[0052] According to one embodiment of the present invention, the second column of primary cyclone separators 121 includes a first cylinder and a second cylinder; the first cylinder and the second column of secondary cyclone separators 122 are connected through a second column of primary rising pipes 126; the lower end of the first cylinder is connected to the first column of secondary rising pipes 117 through a material pipe 19; the lower end of the second cylinder is connected to the second column of secondary rising pipes 127 through a material pipe 19.

[0053] In this embodiment, the raw material fed into the second-stage primary riser pipe 126 by the feeding mechanism 13 and the unloading mechanism 14 is drawn into the second-stage primary cyclone separator 121 by the high-temperature fan. The second-stage primary cyclone separator 121 includes a first cylinder and a second cylinder. The lower end of the first cylinder supplies raw material to the first preheater 11 through the feed pipe 19, and the lower end of the second cylinder supplies raw material to the second preheater 12 through the feed pipe 19. In this way, in addition to the raw material directly fed into the first preheater 11 and the second preheater 12 by the feeding mechanism 13, the amount of raw material entering the first preheater 11 and the second preheater 12 can also be adjusted by the distribution mechanism 15. This makes the outlet temperature, exhaust gas, pressure and other parameters of the two preheaters tend to be balanced, stabilizes the operating conditions, and improves the heat exchange efficiency, saving energy and reducing consumption.

[0054] The preheating and pre-decomposition system 1 provided in this embodiment can flexibly adjust the feeding ratio of the first row of preheaters 11 into the kiln within the range of 70% to 130%. The solid-gas ratio of the first row of primary riser pipes 116 and the second row of primary riser pipes 126 can be adjusted between 1.5 and 2.5 according to the adjustment of the distribution ratio. The outlet temperature of the first row of primary cyclone separators 111 is 200℃ to 280℃, the outlet temperature of the second row of primary cyclone separators 121 is 280℃ to 350℃, and the temperature of the preheater exhaust gas collection channel 1512 is 275℃ to 290℃.

[0055] In the above embodiments of this utility model, the feeding mechanism 13 includes a kiln elevator, and the discharging mechanism 14 includes a star-shaped feeder. The raw material entering the kiln elevator is fed into the first primary riser pipe 116 and the second primary riser pipe 126 through a star-shaped feeder to adjust the feeding amount. The star-shaped feeder can accurately adjust the feeding amount and can adjust the feeding amount in the first preheater 11 and the second preheater 12 according to the actual working conditions to ensure that the outlet temperature, exhaust gas volume, pressure and other parameters of the first preheater 11 and the second preheater 12 tend to be balanced and the working conditions are stable.

[0056] According to one embodiment of the present invention, such as Figure 1As shown, a three-way distribution valve 16 is provided on the material pipe 19 between the lower end of the first cylinder and the first column of secondary riser pipes 117. The three-way distribution valve 16 has a first interface, a second interface, and a third interface. The first column of secondary riser pipes 117 has a first inlet 11711 and a second inlet 11712. The first interface is connected to the material pipe 19, the second interface is connected to the first inlet 11711, and the third interface is connected to the second inlet 11712. In this embodiment, the material in the first cylinder enters the three-way distribution valve 16 through the material pipe 19 at the lower outlet, and then enters the first column of secondary riser pipes 117 through the second interface. In this embodiment, the material is divided into two streams by the three-way distribution valve 16 and enters the first column of secondary riser pipes 117, so that the material entering the first column of secondary riser pipes 117 is more uniform and the heat exchange efficiency between the material and the hot air is higher.

[0057] Optional, such as Figure 4 As shown, the first feed inlet 11711 and the second feed inlet 11712 are located on both sides of the first column of secondary riser pipes 117 to ensure uniform feeding. Figure 4 As shown, the first feed inlet 11711 is higher than the second feed inlet 11712; this is achieved by setting a high-level feed point and a low-level feed point. For example, as... Figure 4 As shown, the height from the first feed inlet 11711 to the bottom of the first secondary riser pipe 117 is 1200mm, and the height from the second feed inlet 11712 to the bottom of the first secondary riser pipe 117 is 800mm. This staggered feeding method creates different raw material feeding speeds, intensifying the turbulence of the material flow entering the first secondary riser pipe 117, resulting in more thorough mixing of material and airflow. It also allows for adjustment of the upstream material distribution ratio, improving the air-material heat exchange effect. Simultaneously, due to the double-sided feeding of material, the air velocity within the first secondary riser pipe 117 can be reduced to 12-14 m / s, lowering resistance. Furthermore, the reduced air velocity and resistance within the first secondary riser pipe 117, along with the reduced air velocity throughout the entire first preheater 11, lowers the cyclone resistance to 14-16 m / s.

[0058] like Figure 4As shown, a three-way distribution valve 16 is provided on the material pipe 19 between the lower end of the second cylinder and the second column of secondary riser pipes 127. The three-way distribution valve 16 has a first interface, a second interface, and a third interface. The second column of secondary riser pipes 127 has a first inlet 11711 and a second inlet 11712. The first interface is connected to the material pipe 19, the second interface is connected to the first inlet 11711, and the third interface is connected to the second inlet 11712. In this embodiment, the structure of the second column of secondary riser pipes 127 is the same as that of the first column of secondary riser pipes 117, which is also to make the material in the pipe more uniform, the material mixing more complete, and to improve the heat exchange efficiency.

[0059] It should be noted that in this application, the first column of primary riser pipe 116 and the second column of primary riser pipe 126 can also have the above structure, that is, the first column of primary riser pipe 116 and the second column of primary riser pipe 126 also include the first inlet 11711 and the second inlet 11712, and the first inlet 11711 and the second inlet are staggered in height.

[0060] According to one embodiment of this utility model, the first column of secondary riser pipes 117 includes a drag-reducing layer, a casting layer, and a heat insulation layer arranged sequentially from the inside to the outside; and / or, the second column of secondary riser pipes 127 includes a drag-reducing layer, a casting layer, and a heat insulation layer arranged sequentially from the inside to the outside; wherein the drag-reducing layer is made of heat-resistant steel, preferably 304 heat-resistant steel. By setting the drag-reducing layer, the pipe resistance coefficient in the riser pipe can be reduced, and the heat exchange efficiency between the material and the airflow can be improved. The casting layer is formed by castable material, such as concrete, and the heat insulation layer is a nano-insulation board. By setting the heat insulation layer, heat loss can be prevented, and the heat utilization rate can be improved. At the same time, since the inside of the drag-reducing layer is smooth, and the thermal shrinkage rates of the heat-resistant steel and the material on the surface of the drag-reducing layer are different, the skin on the surface of the drag-reducing layer will automatically fall off when the machine is started or stopped, which can self-clean the harmful skin attached to the surface of the drag-reducing layer and ensure that the pipe resistance remains in a good state.

[0061] According to one embodiment of the present invention, such as Figure 4As shown, the first column of secondary riser pipes 117 includes a pipe body 1171 and a top cover 1172. The pipe body 1171 is vertically arranged and has an internal cavity. The top cover 1172 is located at the upper end of the pipe body 1171. The top cover 1172 and the upper end of the pipe body 1171 form a first opening communicating with the cavity, and the lower end of the pipe body 1171 forms a second opening. The top cover 1172 includes a first plate 11721, a second plate 11722, and a third plate 11723. The first plate 11721 is horizontally arranged. One end of the second plate 11722 is connected to the first plate 11721, and the other end is connected to one end of the third plate 11723. The other end of the third plate 11723 is connected to the upper end of the pipe body 1171. The second plate 11722 and the third plate 11723 are inclined downward relative to the first plate 11721. In this embodiment, the top cover 1172 is constructed by splicing together a first plate 11721, a second plate 11722, and a third plate 11723. The second plate 11722 and the third plate 11723 are inclined relative to the first plate 11721. This reduces the pipe resistance inside the first row of secondary riser pipes 117, thereby reducing the system resistance of the first row of preheaters 11. Specifically, in this application, the angle between the second plate 11722 and the first plate 11721 is 15°, and the angle between the third plate 11723 and the pipe body 1171 is 60°.

[0062] According to another embodiment of the present invention, the second column of secondary ascending pipes 127 includes a pipe body 1171 and a top cover 1172. The pipe body 1171 is vertically arranged and has an internal cavity. The top cover 1172 is located at the upper end of the pipe body 1171. The top cover 1172 and the upper end of the pipe body 1171 form a first opening communicating with the cavity, and the lower end of the pipe body 1171 forms a second opening. The top cover 1172 includes a first plate 11721, a second plate 11722, and a third plate 11723. The first plate 11721 is horizontally arranged. One end of the second plate 11722 is connected to the first plate 11721, and the other end is connected to one end of the third plate 11723. The other end of the third plate 11723 is connected to the upper end of the pipe body 1171. The second plate 11722 and the third plate 11723 are inclined downward relative to the first plate 11721. The above structure can reduce the pipe resistance of the second preheater 12, thereby reducing the system resistance at the air inlet of the entire preheater.

[0063] In this embodiment, the first column of primary riser pipes 116 and the second column of primary riser pipes 126 can also have the same structure, that is, the first column of primary riser pipes 116 and the second column of primary riser pipes 126 also include a pipe body 1171 and a top cover 1172. The top cover 1172 is formed by splicing a first plate 11721, a second plate 11722, and a third plate 11723, and the second plate 11722 and the third plate 11723 are inclined relative to the first plate 11721. This arrangement can improve the system resistance of the preheater air inlet section. It should be noted that in this embodiment, all riser pipes can adopt the above structure.

[0064] According to one embodiment of the present invention, such as Figure 2 and Figure 3 As shown, the material distribution mechanism 15 includes a housing and a baffle 154. The housing includes a first pipe section 152, a second pipe section 153, and a main pipe section 151. A main channel 1512 is formed in the main pipe section 151, a first channel 1523 is formed in the first pipe section 152, and a second channel 1531 is formed in the second pipe section 153. The first channel 1523 and the second channel 1531 are respectively connected to the main channel 1512. The baffle 154 is rotatably disposed at the connection between the first channel 1523 and the second channel 1531. The baffle 154 can rotate to adjust the opening degree of the connection between the first channel 1523 and the second channel 1531 and the main channel 1512.

[0065] When the material in the first-stage riser pipe 116 is drawn into the first-stage cyclone separator 111 by the high-temperature fan, the material entering the first-stage cyclone separator 111 enters the material distribution mechanism 15. At this time, the opening between the first channel 1523 and the main channel 1512 can be adjusted by rotating the baffle 154, thereby adjusting the amount of material entering the first channel 1523. The first channel 1523 is connected to the second-stage riser pipe 126, so the amount of material entering the second-stage riser pipe 126 can be adjusted. Similarly, the opening between the second channel 1531 and the main channel 1512 can be adjusted by rotating the baffle 154. The second channel 1531 is connected to the first-stage riser pipe 116, thereby adjusting the amount of material entering the first-stage riser pipe 116. The opening between the first channel 1523 and the main channel 1512 is inversely correlated with the opening between the second channel 1531 and the main channel 1512; that is, a larger opening between the first channel 1523 and the main channel 1512 results in a smaller opening between the second channel 1531 and the main channel 1512. Therefore, the amount of material fed into the first preheater 11 and the second preheater 12 can be adjusted by considering actual environmental factors, such as the temperature of the raw material entering the kiln and the temperature of the material discharged from the cyclone separator, thereby achieving a balance in parameters such as the outlet temperature, exhaust gas, and pressure of the first preheater 11 and the second preheater 12.

[0066] According to one embodiment of the present invention, such as Figure 2 and Figure 3 As shown, an opening 1521 is provided on one side wall of the first pipe section 152, and one end of the second pipe section 153 is connected to the opening 1521; the lower end of the baffle 154 is connected to the inner wall of the opening 1521 located below it, and a first shielding part 1522 and a second shielding part 1511 are formed on the lower side of the main pipe section 151; when the baffle 154 is rotated to the first limit position, the first channel 1523 is connected to the main channel 1512, and the other end of the baffle 154 is located below the first shielding part 1522; when the baffle 154 is rotated to the second limit position, the second channel 1531 is connected to the main channel 1512, and the other end of the baffle 154 is located below the second shielding part 1511.

[0067] In this embodiment, the first pipe segment 152 and the main pipe segment 151 are both vertically arranged, the first channel 1523 and the main channel 1512 are upper and lower opening cavities, and one end of the second pipe segment 153 is connected to the opening 1521 of the first pipe segment 152, and the other end extends downward at an angle. At the same time, the lower end of the baffle 154 is rotatably connected to the inner wall of the opening 1521.

[0068] like Figure 2 As shown, when the baffle 154 rotates to the vertical position, the second pipe section 153 is not connected to the first pipe section 152 and the main pipe section 151, while the first pipe section 152 and the main pipe section 151 are fully connected. The amount of material entering the first pipe section 152 is the largest, which means the most material enters the second column of primary riser pipes 126. At this time, the baffle 154 rotates to the first limit position. Since the first shielding part 1522 is provided on the upper side of the baffle 154, the projection of the first shielding part 1522 in the vertical direction covers the free end of the baffle 154. The material entering from the main pipe section 151 falls directly onto the surface of the baffle 154 and will not leak from the gap between the free end of the baffle 154 and the inner wall of the main pipe section 151 or the first pipe section 152, thus ensuring the accuracy of material distribution.

[0069] like Figure 3As shown, when the baffle 154 rotates to the second limit position, the free end of the baffle 154 is located below the second blocking part 1511, the second pipe section 153 and the main pipe section 151 are completely connected, and the first pipe section 152 is not connected to the main pipe section 151 and the second pipe section 153. The amount of material entering the second pipe section 153 is the largest, which is also the largest amount of material entering the first column of primary riser pipes 116. Since the second blocking part 1511 is provided on the upper side of the baffle 154, the projection of the second blocking part 1511 in the vertical direction covers the free end of the baffle 154. The material entering from the main pipe section 151 falls directly on the surface of the baffle 154 and will not leak from the gap between the free end of the baffle 154 and the inner wall of the main pipe section 151 or the first pipe section 152, thus ensuring the accuracy of material distribution.

[0070] When the baffle 154 moves between the first and second extreme positions, both the first pipe section 152 and the second pipe section 153 are connected to the main pipe section 151, meaning that both the first channel 1523 and the second channel 1531 are connected to the main channel 1512. When the baffle 154 rotates from the first extreme position to the second extreme position, the opening between the first channel 1523 and the main channel 1512 gradually decreases, while the opening between the second channel 1531 and the main channel 1512 gradually increases. Conversely, when the baffle 154 rotates from the second extreme position to the first extreme position, the opening between the first channel 1523 and the main channel 1512 gradually increases, while the opening between the second channel 1531 and the main channel 1512 gradually decreases. Therefore, the amount of material entering the first row of primary riser pipes 116 and the second row of primary riser pipes 126 can be adjusted by adjusting the rotation angle of the baffle 154.

[0071] like Figure 2 and Figure 3 As shown, the first shielding portion 1522 is the inner wall of the upper side of the opening 1521; the outer wall of the main pipe section 151 is connected to the inner wall of the first pipe section 152, and the lower end of the main pipe section 151 forms the second shielding portion 1511. In this embodiment, the upper inner wall of the opening 1521 forms the first shielding portion 1522. When the free end of the baffle 154 is in the first extreme position, the free end of the baffle 154 is located below the upper inner wall of the opening 1521, and there is a very small gap between it and the inner wall of the opening 1521. When the free end of the baffle 154 is in the second extreme position, the baffle 154 is located at the lower end of the main pipe section 151, and the projection of the main pipe section 151 covers the free end of the baffle 154. Through the above structure, the leakage of material when the baffle 154 is in the free end can be reduced.

[0072] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. Furthermore, in the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0073] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A preheating and pre-decomposition system, characterized in that, include: Feeding mechanism, unloading mechanism and distributing mechanism, first preheater and second preheater; The first row of preheaters includes, from top to bottom, a first row of primary cyclone separators, a first row of secondary cyclone separators, a first row of tertiary cyclone separators, a first row of quaternary cyclone separators, and a first row of quinary cyclone separators; The first column of primary cyclone separators and the first column of secondary cyclone separators are connected through the first column of primary rising pipes; the first column of secondary cyclone separators and the first column of tertiary cyclone separators are connected through the first column of secondary rising pipes; the first column of tertiary cyclone separators and the first column of quaternary cyclone separators are connected through the first column of tertiary rising pipes; and the first column of quaternary cyclone separators and the first column of quinary cyclone separators are connected through the first column of quaternary rising pipes. The second row of preheaters includes, from top to bottom, a second row of primary cyclone separators, a second row of secondary cyclone separators, a second row of tertiary cyclone separators, a second row of quaternary cyclone separators, and a second row of quinary cyclone separators; The second column of primary cyclone separators and the second column of secondary cyclone separators are connected through the second column of primary rising pipes; the second column of secondary cyclone separators and the second column of tertiary cyclone separators are connected through the second column of secondary rising pipes; the second column of tertiary cyclone separators and the second column of quaternary cyclone separators are connected through the second column of tertiary rising pipes; and the second column of quaternary cyclone separators and the second column of quinary cyclone separators are connected through the second column of quaternary rising pipes. The feeding mechanism is connected to the first and second primary riser pipes via a feeding mechanism. The lower end of the first primary cyclone is connected to the distribution mechanism, which is connected to the first and second primary riser pipes via a material pipe.

2. The preheating and pre-decomposition system according to claim 1, characterized in that, The second column of primary cyclone separators includes a first cylinder and a second cylinder; The first cylinder and the second column of secondary cyclone separators are connected by the second column of primary riser pipes; The lower end of the first cylinder is connected to the first column of secondary riser pipes via a material pipe; the lower end of the second cylinder is connected to the second column of secondary riser pipes via a material pipe.

3. The preheating and pre-decomposition system according to claim 2, characterized in that, A three-way material distribution valve is provided on the material pipe between the lower end of the first cylinder and the first column of secondary riser pipes. The three-way material distribution valve has a first interface, a second interface and a third interface. The first column of secondary riser pipes has a first inlet and a second inlet, the first inlet being connected to the feed pipe, the second inlet being connected to the first inlet, and the third inlet being connected to the second inlet; and / or, A three-way material distribution valve is provided on the material pipe between the lower end of the second cylinder and the second column of secondary riser pipes. The three-way material distribution valve has a first interface, a second interface and a third interface. The second column of secondary riser pipes has a first inlet and a second inlet. The first interface is connected to the feed pipe, the second interface is connected to the first inlet, and the third interface is connected to the second inlet.

4. The preheating and pre-decomposition system according to claim 3, characterized in that, The first feed inlet is higher than the second feed inlet.

5. The preheating and pre-decomposition system according to claim 3, characterized in that, The first column of secondary riser pipes includes a drag-reducing layer, a casting layer, and a heat insulation layer arranged sequentially from the inside to the outside; and / or, the second column of secondary riser pipes includes a drag-reducing layer, a casting layer, and a heat insulation layer arranged sequentially from the inside to the outside.

6. The preheating and pre-decomposition system according to claim 3, characterized in that, The first column of secondary riser pipes includes a pipe body and a top cover. The pipe body is vertically arranged and has an internal cavity. The top cover is located at the upper end of the pipe body. The top cover and the upper end of the tube form a first opening communicating with the cavity, and the lower end of the tube forms a second opening; wherein the top cover includes a first plate, a second plate and a third plate; The first plate is horizontally arranged, one end of the second plate is connected to the first plate, and the other end is connected to one end of the third plate. The other end of the third plate is connected to the upper end of the tube. The second plate and the third plate are inclined downward relative to the first plate.

7. The preheating and pre-decomposition system according to claim 3, characterized in that, The second column of secondary riser pipes includes a pipe body and a top cover. The pipe body is vertically arranged and has an internal cavity. The top cover is located at the upper end of the pipe body. The top cover and the upper end of the tube form a first opening communicating with the cavity, and the lower end of the tube forms a second opening; wherein the top cover includes a first plate, a second plate and a third plate; The first plate is horizontally arranged, one end of the second plate is connected to the first plate, and the other end is connected to one end of the third plate. The other end of the third plate is connected to the upper end of the tube. The second plate and the third plate are inclined downward relative to the first plate.

8. The preheating and pre-decomposition system according to any one of claims 1 to 7, characterized in that, The material dispensing mechanism includes a housing and a baffle; The shell includes a first pipe section, a second pipe section, and a main pipe section, wherein a main channel is formed in the main pipe section, a first channel is formed in the first pipe section, and a second channel is formed in the second pipe section; The first channel and the second channel are respectively connected to the main channel. The baffle is rotatably disposed at the connection between the first channel and the second channel. The baffle can rotate to adjust the opening degree of the connection between the first channel, the second channel and the main channel.

9. The preheating and pre-decomposition system according to claim 8, characterized in that, An opening is provided on one side wall of the first pipe section, and one end of the second pipe section is connected to the opening; The lower end of the baffle is connected to the inner wall of the opening on the lower side, and a first shielding part and a second shielding part are formed on the lower side of the main pipe section; When the baffle is rotated to the first limit position, the first channel is connected to the main channel, and the other end of the baffle is located below the first blocking part; When the baffle is rotated to the second limit position, the second channel is connected to the main channel, and the other end of the baffle is located below the second shielding part.

10. The preheating and pre-decomposition system according to claim 9, characterized in that, The first blocking part is the inner wall on the upper side of the opening; The outer wall of the main pipe section is connected to the inner wall of the first pipe section, and the lower end of the main pipe section forms the second shielding part.

Images