Flash burning activation system

Abstract

The utility model relates to the technical field of cement preparation, in particular to a flash-burning activation system. The device specifically comprises a grinding module and a calcining module, a material firstly passes through the grinding module and then enters the calcining module; the grinding module comprises a vibrating screen, a crusher, a raw material bin I, a raw material bin II, a roller press and a combined efficient powder concentrator; the calcining module comprises a preheating cyclone cylinder, an oxygen-enriched combustion furnace, a cooling cyclone cylinder, an oxygen-poor combustion furnace and a material reduction area; and the activated material enters a finished product warehouse. The coal gangue activation device has the advantages that the activation of materials such as coal gangue can be met, and the problem that materials containing iron elements are red after being calcined can be avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of cement preparation, in particular to a flash activation system. Background Art

[0002] The production and use of cement will generate a lot of energy consumption and carbon emissions. Different occasions require cement with different properties. Therefore, different mineral materials need to be added in the production process of cement to reduce production costs and adjust the properties of cement.

[0003] The materials used to prepare active cement admixtures include clay, volcanic ash, fly ash, slag, coal gangue, etc. Some of these raw materials have poor activity if they are not calcined. During the calcination process, some materials need to be added with other materials to improve their performance. For example, if calcium is lacking, limestone needs to be added. Some materials need to be reduced and cooled after calcination. For example, materials containing iron will appear red after calcination, and need to be cooled in a reducing atmosphere to turn them gray.

[0004] Our company has developed a system for preparing active mixed materials using coal gangue, including an extrusion grinding module and a flash activation module. The two modules can fully activate the coal gangue, saving heat energy to activate the coal gangue. In the process of activating the coal gangue, the calcium oxide content in the coal gangue can be flexibly adjusted to make the coal gangue meet the use requirements. The technology applied for a utility model patent on July 11, 2023, and the patent announcement number is: CN 220265587 U.

[0005] At present, the above patented technology still turns red when calcining materials containing iron elements, which affects the later sales of cement products. At present, there is a need for a flash activation system that can not only meet the activation of materials such as coal gangue, but also solve the problem that materials containing iron elements turn red after calcination, which affects product sales. Utility Model Content

[0006] The utility model aims to solve the problems in the above-mentioned background technology and proposes a flash activation system.

[0007] The technical solution of the utility model is:

[0008] A flash activation system comprises a grinding module and a calcining module; the material first passes through the grinding module and then enters the calcining module; the grinding module comprises a vibrating screen, a crusher, a first raw material bin, a second raw material bin, a roller press, and a combined high-efficiency powder classifier; the calcining module comprises a preheating cyclone, an oxygen-enriched combustion furnace, a cooling cyclone, an oxygen-poor combustion furnace, and a material reduction zone; the activated material enters a finished product warehouse.

[0009] Furthermore, the vibrating screen is divided into an upper part and a lower part. The material enters the vibrating screen from the stockpile for screening, the material on the screen remains in the upper part of the vibrating screen, and the material under the screen remains in the lower part of the vibrating screen; the upper part of the vibrating screen is connected to a crusher, one end of the crusher is connected to the upper part of the vibrating screen and the other end is connected to a raw material bin one through a belt conveyor A; the lower part of the vibrating screen is also connected to a raw material bin one through a belt conveyor A.

[0010] Furthermore, the raw material bin 2 is arranged in parallel with the raw material bin 1, and two measuring scales are provided on the grinding module, and the measuring devices are respectively arranged at the outlet of the raw material bin 2 and the outlet of the raw material bin 1.

[0011] Furthermore, the discharge ports of the two weighing devices are respectively connected to the belt conveyor B, the discharge port of the belt conveyor B is connected to the feed port of the elevator 1, the discharge port of the elevator 1 is connected to the feed port of the buffer bin, and the discharge port of the buffer bin is connected to the feed port of the roller press; when the mixed material enters the roller press for extrusion and grinding, the ground material is sent to the combined high-efficiency powder classifier by the elevator 2; the combined high-efficiency powder classifier can separate coarse powder and fine powder, the coarse powder returns to the roller press, and the fine powder enters the calcination module.

[0012] Furthermore, the calcining module is provided with a gate valve, which divides the equipment on the calcining module into two parts, a reduction part and a non-reduction part; the non-reduction part includes a preheating cyclone, an oxygen-enriched combustion furnace and a cooling cyclone; the fine powder enters the preheating cyclone from the grinding module through a material pipe, the preheating cyclone is connected to the oxygen-enriched combustion furnace, the air inlet of the oxygen-enriched combustion furnace is connected to the cooling cyclone, the outlet of the oxygen-enriched combustion furnace is connected to a solid-gas separation device, the material cooled by the solid-gas separation device is sent to the finished product warehouse through a connected zipper machine, and the gas passes through the preheating cyclone and is discharged after exhaust gas treatment and dust removal.

[0013] Furthermore, the reduction section includes a preheating cyclone, an oxygen-rich combustion furnace, an oxygen-depleted combustion furnace, a cooling cyclone, and a material reduction zone; the fine powder enters the preheating cyclone from the grinding module, and enters the oxygen-rich combustion furnace after preheating. The air inlet of the oxygen-rich combustion furnace is connected to the cooling cyclone, and the oxygen-rich combustion furnace is also connected to the oxygen-depleted combustion furnace. When the fine powder burns in the oxygen-rich combustion furnace, the cooling cyclone provides air so that the fine powder is flash-burned and activated in the oxygen-rich combustion furnace. The activated fine powder is mixed with the gas from the oxygen-depleted combustion furnace, and the material enters the connected material reduction zone after passing through the solid-gas separation device, and is reduced and cooled in the material reduction zone; the reduction section outlet is connected to the solid-gas separation device, and after solid-gas separation, the material passes through the cooling cyclone and is sent to the finished product warehouse through a zipper machine. After the gas passes through the preheating cyclone, it is discharged after exhaust gas treatment and dust removal.

[0014] Furthermore, the solid-gas separation device is a cyclone having solid-gas separation and heat exchange functions.

[0015] The beneficial effects of the utility model are as follows: the utility model first grinds the raw materials, and then flash-burns and activates the raw materials, which can fully stimulate the activity of the finished product; the grinding module is provided with a raw material bin one and a raw material bin two, and other ingredients can be added to the raw materials according to different needs, and ground and activated at the same time; the grinding module is provided with a vibrating screen, a crusher and a roller press, which can screen, crush and grind the raw materials, and make the system adapt to raw materials of different particle sizes; two measuring scales are respectively provided under the two raw material bins, and different mixed materials can be prepared according to different raw material conditions, which is convenient for raw material mixing and subsequent calcination and activation; a combined high-efficiency powder classifier is provided in the grinding module, and the optimal fineness for stimulating the activity of different types of raw materials is different. The combined high-efficiency powder classifier can adjust the fineness of the raw materials at any time.

[0016] A gate valve is arranged in the calcining module, and the gate valve is adjusted to allow the ground material to enter the reduction section or the non-reduction section; when the material enters the reduction section, the activated high-temperature material can reduce harmful oxides and cool in the reducing atmosphere; the iron-containing material is reduced to gray after calcination, which does not affect the appearance of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the structure of the utility model;

[0018] In the figure:

[0019] 1. Vibrating screen; 2. Crusher; 3. Belt conveyor A;

[0020] 4-1, Raw material warehouse one; 4-2, Raw material warehouse two; 5-1, Weighing scale one;

[0021] 5-2, weighing scale 2; 6-1, diversion trough 1; 6-2, diversion trough 2;

[0022] 7. Belt conveyor B; 8. Elevator 1; 9. Buffer bin;

[0023] 10. Roller press; 11. Elevator 2; 12. Combined high-efficiency powder classifier;

[0024] 13. Gate valve; 14. Gate valve; 15. Gate valve;

[0025] 16. Gate valve; 17. Gate valve; 18. Gate valve;

[0026] 19. Gate valve; 20. Gate valve; 21. Zipper machine;

[0027] 22. Dust collector; 23. Chimney; 24. Finished product warehouse;

[0028] C1, cyclone one; C2, cyclone two; C5, cyclone five;

[0029] C6, cyclone six; C7, cyclone seven; C8, cyclone eight;

[0030] F, oxygen-rich combustion furnace; P, oxygen-poor combustion furnace; W, material reduction area;

[0031] Q. Exhaust gas treatment device; DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0033] Example 1

[0034] A flash activation system includes a grinding module and a calcining module; the material first passes through the grinding module and then enters the calcining module; the grinding module includes a vibrating screen 1, a crusher 2, a raw material bin 1 4-1, a raw material bin 2 4-2, a roller press 10, and a combined high-efficiency powder classifier 12; the calcining module includes a preheating cyclone 1 C1 and a preheating cyclone 2 C2, an oxygen-enriched combustion furnace F, a cooling cyclone 7 C7 and a cooling cyclone 8 C8, an oxygen-depleted combustion furnace P, and a material reduction zone W; the activated material enters a finished product warehouse 24.

[0035] When coal gangue is used to make active mixed materials, the coal gangue from the stockpile is transported to the vibrating screen 1. After screening, the large pieces of material fall into the crusher 2, and the small pieces of material after screening and the small pieces crushed by the crusher 2 fall into the raw material bin 1 4-1 through the belt conveyor A3; when coal gangue is used to make active mixed materials, calcium elements need to be supplemented. A raw material bin 2 4-2 is set at a position parallel to the raw material bin 1 4-1, and limestone is put into the raw material bin 2 4-2. There are meters under the raw material bin 1 4-1 and the raw material bin 2 4-2. Weighing scale 1 5 - 1 and weighing scale 2 5 - 2 are used to control the blending ratio of raw materials. The mixed materials are transported to buffer bin 9 through belt conveyor B7 and elevator 1 8. Buffer bin 9 is provided with two feeding ports, which are respectively connected to the discharging port from elevator 1 8 and the discharging port of combined high-efficiency powder classifier 12. The discharging port of buffer bin 9 is connected to the feeding port of roller press 10. The discharging port of roller press 10 is connected to the feeding port of elevator 2 11. The discharging port of elevator 2 11 is connected to the feeding port of combined high-efficiency powder classifier 12.

[0036] The feed port of the combined high-efficiency powder classifier 12 is connected to the discharge port of the elevator 11, and the discharge port of the combined high-efficiency powder classifier 12 is connected to a feed port of the buffer bin 9. The combined high-efficiency powder classifier 12 transports unqualified coarse powder back to the roller press 10 for repeated roller pressing; and the qualified fine powder screened by the high-efficiency powder classifier 12 is uniformly collected and transported to the calcination module.

[0037] The calcination module is divided into two parts, namely the reduction part and the non-reduction part, wherein the non-reduction part equipment includes preheating cyclone C1 and preheating cyclone C2, oxygen-enriched combustion furnace F and cooling cyclone C7 and cooling cyclone C8; reduction is not required in the process of activating coal gangue, so the fine powder after passing through the grinding module enters the non-reduction part; the gate valves provided on the non-reduction part equipment are opened: during operation, the gate valve 14 connected to the cyclone C5, the gate valve 16 connected to the exhaust gas treatment device Q and the gate valve 19 connected to the cooling cyclone C7 and the cooling cyclone C8 can be opened; the gate valves connected to the reduction part equipment are closed to close the material reduction function.

[0038] After the raw materials are preheated by the hot air from the oxygen-enriched combustion furnace F in the preheating cyclone C1 and the preheating cyclone C2, they enter the oxygen-enriched combustion furnace F for flash activation. The activated finished materials and the hot air are separated into solid and gas in the cyclone C5, and then the materials are cooled after passing through the cooling cyclone C7 and the cooling cyclone C8, and then enter the finished product warehouse through the zipper machine 21. The gas participating in the combustion in the oxygen-enriched combustion furnace F is air. When these air pass through the cooling cyclone C7 and the cooling cyclone C8, they complete heat exchange with the high-temperature finished materials and recover heat energy. The high-temperature gas generated after combustion in the oxygen-enriched combustion furnace F has a lower temperature after completing heat exchange in the preheating cyclone C1 and the preheating cyclone C2, and is discharged from the chimney 23 after passing through the tail gas treatment device Q and the dust collector 22. Among them, part of the material collected by the dust collector 22 is returned to the raw material warehouse.

[0039] Example 2

[0040] A flash activation system includes a grinding module and a calcining module; the material first passes through the grinding module and then enters the calcining module; the calcining module is divided into a reduction part and a non-reduction part, wherein the reduction part includes an oxygen-poor combustion furnace P and a material reduction zone W;

[0041] When clay is used to prepare active admixtures, the clay contains a variety of colored elements, such as iron, titanium and manganese, which will change color after calcination. In the existing activation system, the calcination usually shows red because of the iron content, which makes the final cement red, which is not conducive to sales. Therefore, it is necessary to reduce and cool the iron oxide in a reducing atmosphere after calcination. If it is only reduced without cooling, it will be oxidized when it encounters air. Therefore, it is necessary to turn on the reduction cooling function in the calcination module.

[0042] The clay ore from the stockpile is transported to the vibrating screen 1. After screening, the large pieces fall into the crusher 2. The small pieces after screening and the small pieces after crushing by the crusher fall into the raw material bin 1 4-1 through the belt conveyor A3. If no other materials are needed, the raw material bin 2 4-2 can be closed by the weighing scale 2 5-2. The clay raw material is transported to the buffer bin 9 through the belt conveyor B7 and the elevator 1 8. The buffer bin 9 is provided with two feed ports, which are respectively connected to the discharge port from the elevator 1 8 and the discharge port of the combined high-efficiency powder selector 12. The discharge port of the buffer bin 9 is connected to the feed port of the roller press 10, and the discharge port of the roller press 10 is connected to the feed port of the elevator 2 11. The discharge port of the elevator 2 11 is connected to the feed port of the combined high-efficiency powder selector 12.

[0043] The feed port of the combined high-efficiency powder classifier 12 is connected to the discharge port of the elevator 11, and the discharge port of the combined high-efficiency powder classifier 12 is connected to a feed port of the buffer bin 9, and the screened coarse powder is transported to the roller press 10 for repeated roller pressing; and the fine powder that passes the screening is uniformly collected and transported to the calcination module.

[0044] In the process of activating clay, reduction cooling is required. Open the reduction equipment and connect the gate valve to turn on the material reduction function.

[0045] During operation, the upper gate valve 13 and the lower gate valve 15 connected to the oxygen-depleted combustion furnace P, the gate valve 17 connected to the cyclone six C6, the air intake gate valve 18 and the feed gate valve 20 connected to the material reduction area W can be opened, the gate valve of the non-reduction part can be closed, and the material reduction function can be turned on.

[0046] After the material reduction function is turned on, the high-temperature gas from the oxygen-rich combustion furnace F will be sent to the oxygen-depleted combustion furnace P. The gas from the oxygen-rich combustion furnace F has a low oxygen content due to combustion, and will react with the fuel to generate reducing gas, such as carbon monoxide, in the oxygen-depleted combustion furnace P. These reducing gases exchange heat with the raw materials when passing through the preheating cyclone C1 and the preheating cyclone C2, and the temperature is reduced. Then, they enter the material reduction zone W and mix with the finished material that has been activated in the oxygen-rich combustion furnace F, so that the material is reduced and cooled.

[0047] The raw materials are preheated by preheating cyclone 1 C1 and preheating cyclone 2 C2, and then enter the oxygen-enriched combustion furnace F to be flash-burned and activated. The colored elements in the clay show color due to oxidation. The finished materials and high-temperature gas come out of the oxygen-enriched combustion furnace F and enter the cyclone 5 C5. The solid and gas are separated in the cyclone 5 C5. The materials enter the material reduction zone W, and the gas enters the oxygen-depleted combustion furnace P.

[0048] In the material reduction area, the oxide impurities in the finished material are reduced and cooled in a reducing atmosphere, such as carbon monoxide. The reducing gas is oxidized. Then the mixed gas of the material and the gas enters the cyclone six C6 to be separated into solid and gas, and the gas enters the tail gas treatment device. The material enters the cooling cyclone seven C7 and the cooling cyclone eight C8 and then enters the finished product warehouse 24 through the zipper machine 21.

[0049] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A flash activation system, characterized in that: It includes a grinding module and a calcining module; the material first passes through the grinding module and then enters the calcining module; the grinding module includes a vibrating screen, a crusher, a raw material bin one, a raw material bin two, a roller press, and a combined high-efficiency powder classifier; the calcining module includes a preheating cyclone, an oxygen-enriched combustion furnace, a cooling cyclone, an oxygen-depleted combustion furnace, and a material reduction area; the activated material enters the finished product warehouse.

2. A flash activation system according to claim 1, characterized in that: The vibrating screen is divided into two parts, an upper part and a lower part. The upper part of the vibrating screen is connected to a crusher. One end of the crusher is connected to the upper part of the vibrating screen and the other end is connected to a raw material bin 1 through a belt conveyor A. The lower part of the vibrating screen is also connected to a raw material bin 1 through a belt conveyor A.

3. A flash activation system according to claim 2, characterized in that: The raw material bin 2 is arranged in parallel with the raw material bin 1, and two weighing devices are also arranged on the grinding module, and the weighing devices are respectively arranged at the outlet of the raw material bin 2 and the outlet of the raw material bin 1.

4. A flash activation system according to claim 3, characterized in that: The discharge ports of the two weighing devices are respectively connected to the belt conveyor B, the discharge port of the belt conveyor B is connected to the feed port of the elevator 1, the discharge port of the elevator 1 is connected to the feed port of the buffer bin, and the discharge port of the buffer bin is connected to the feed port of the roller press; when the mixed material enters the roller press for extrusion and grinding, the ground material is sent to the combined high-efficiency powder selector by the elevator 2; The combined high-efficiency powder classifier can separate coarse powder and fine powder. The coarse powder returns to the roller press and the fine powder enters the calcining module.

5. A flash activation system according to claim 4, characterized in that: The equipment on the calcining module is divided into two parts: a reduction part and a non-reduction part; the equipment on the reduction part and the non-reduction part are respectively provided with a plurality of gate valves, and the operation of the equipment on the calcining module is started by opening and closing the gate valves.

6. A flash activation system according to claim 5, characterized in that: The non-reduction part includes a preheating cyclone, an oxygen-enriched combustion furnace and a cooling cyclone; fine powder enters the preheating cyclone from the grinding module through a material pipe, the preheating cyclone is connected to the oxygen-enriched combustion furnace, the air inlet of the oxygen-enriched combustion furnace is connected to the cooling cyclone, the outlet of the oxygen-enriched combustion furnace is connected to a solid-gas separation device, the material cooled by the solid-gas separation device is sent to the finished product warehouse through a connected zipper machine, and the gas passes through the preheating cyclone and is discharged after exhaust gas treatment and dust removal.

7. A flash activation system according to claim 5, characterized in that: The reduction section includes a preheating cyclone, an oxygen-rich combustion furnace, an oxygen-depleted combustion furnace, a cooling cyclone, and a material reduction zone; the fine powder enters the preheating cyclone from the grinding module, and enters the oxygen-rich combustion furnace after preheating. The air inlet of the oxygen-rich combustion furnace is connected to the cooling cyclone, and the oxygen-rich combustion furnace is also connected to the oxygen-depleted combustion furnace. When the fine powder is burned in the oxygen-rich combustion furnace, the cooling cyclone provides air, so that the fine powder is flash-burned and activated in the oxygen-rich combustion furnace. The activated fine powder is mixed with the gas from the oxygen-depleted combustion furnace, and the material enters the connected material reduction zone after passing through the solid-gas separation device, and is reduced and cooled in the material reduction zone; The outlet of the reduction section is connected to a solid-gas separation device. After solid-gas separation, the material passes through a cooling cyclone and is sent to a finished product warehouse through a zipper machine. The gas passes through a preheating cyclone and is discharged after exhaust gas treatment and dust removal.

8. A flash activation system according to claim 6 or 7, characterized in that: The solid-gas separation device is a cyclone with solid-gas separation and heat exchange functions.

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